Merge remote-tracking branch 'upstream/master' into packet-coalescing-objc

772 files changed, 9029 insertions, 2782 deletions

diff --git a/test/core/bad_client/BUILD b/test/core/bad_client/BUILD
new file mode 100644
index 0000000000..6b06955efe
--- /dev/null
+++ b/test/core/bad_client/BUILD
@@ -0,0 +1,34 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load(":generate_tests.bzl", "grpc_bad_client_tests")
+
+grpc_bad_client_tests()
diff --git a/test/core/bad_client/bad_client.c b/test/core/bad_client/bad_client.c
index 07fcd995d7..fdedfe284e 100644
--- a/test/core/bad_client/bad_client.c
+++ b/test/core/bad_client/bad_client.c
@@ -33,15 +33,18 @@
 
 #include "test/core/bad_client/bad_client.h"
 
+#include <stdio.h>
+
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/thd.h>
-#include <stdio.h>
+
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_stack.h"
 #include "src/core/lib/channel/http_server_filter.h"
 #include "src/core/lib/iomgr/endpoint_pair.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/support/murmur_hash.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/completion_queue.h"
@@ -117,7 +120,7 @@ void grpc_run_bad_client_test(
   grpc_resource_quota *resource_quota =
       grpc_resource_quota_create("bad_client_test");
   sfd = grpc_iomgr_create_endpoint_pair("fixture", resource_quota, 65536);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
 
   /* Create server, completion events */
   a.server = grpc_server_create(NULL, NULL);
@@ -148,7 +151,8 @@ void grpc_run_bad_client_test(
 
   grpc_slice_buffer_init(&outgoing);
   grpc_slice_buffer_add(&outgoing, slice);
-  grpc_closure_init(&done_write_closure, done_write, &a);
+  grpc_closure_init(&done_write_closure, done_write, &a,
+                    grpc_schedule_on_exec_ctx);
 
   /* Write data */
   grpc_endpoint_write(&exec_ctx, sfd.client, &outgoing, &done_write_closure);
@@ -156,16 +160,17 @@ void grpc_run_bad_client_test(
 
   /* Await completion */
   GPR_ASSERT(
-      gpr_event_wait(&a.done_write, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5)));
+      gpr_event_wait(&a.done_write, grpc_timeout_seconds_to_deadline(5)));
 
   if (flags & GRPC_BAD_CLIENT_DISCONNECT) {
-    grpc_endpoint_shutdown(&exec_ctx, sfd.client);
+    grpc_endpoint_shutdown(&exec_ctx, sfd.client,
+                           GRPC_ERROR_CREATE("Forced Disconnect"));
     grpc_endpoint_destroy(&exec_ctx, sfd.client);
     grpc_exec_ctx_finish(&exec_ctx);
     sfd.client = NULL;
   }
 
-  GPR_ASSERT(gpr_event_wait(&a.done_thd, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5)));
+  GPR_ASSERT(gpr_event_wait(&a.done_thd, grpc_timeout_seconds_to_deadline(5)));
 
   if (sfd.client != NULL) {
     // Validate client stream, if requested.
@@ -175,26 +180,28 @@ void grpc_run_bad_client_test(
       grpc_slice_buffer_init(&args.incoming);
       gpr_event_init(&args.read_done);
       grpc_closure read_done_closure;
-      grpc_closure_init(&read_done_closure, read_done, &args);
+      grpc_closure_init(&read_done_closure, read_done, &args,
+                        grpc_schedule_on_exec_ctx);
       grpc_endpoint_read(&exec_ctx, sfd.client, &args.incoming,
                          &read_done_closure);
       grpc_exec_ctx_finish(&exec_ctx);
       GPR_ASSERT(
-          gpr_event_wait(&args.read_done, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5)));
-      grpc_slice_buffer_destroy(&args.incoming);
+          gpr_event_wait(&args.read_done, grpc_timeout_seconds_to_deadline(5)));
+      grpc_slice_buffer_destroy_internal(&exec_ctx, &args.incoming);
     }
     // Shutdown.
-    grpc_endpoint_shutdown(&exec_ctx, sfd.client);
+    grpc_endpoint_shutdown(&exec_ctx, sfd.client,
+                           GRPC_ERROR_CREATE("Test Shutdown"));
     grpc_endpoint_destroy(&exec_ctx, sfd.client);
     grpc_exec_ctx_finish(&exec_ctx);
   }
   grpc_server_shutdown_and_notify(a.server, a.cq, NULL);
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 a.cq, NULL, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), NULL)
+                 a.cq, NULL, grpc_timeout_seconds_to_deadline(1), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(a.server);
   grpc_completion_queue_destroy(a.cq);
-  grpc_slice_buffer_destroy(&outgoing);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
 
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/bad_client/generate_tests.bzl b/test/core/bad_client/generate_tests.bzl
new file mode 100755
index 0000000000..694ddeeab6
--- /dev/null
+++ b/test/core/bad_client/generate_tests.bzl
@@ -0,0 +1,68 @@
+#!/usr/bin/env python2.7
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+"""Generates the appropriate build.json data for all the bad_client tests."""
+
+
+def test_options():
+  return struct()
+
+
+# maps test names to options
+BAD_CLIENT_TESTS = {
+    'badreq': test_options(),
+    'connection_prefix': test_options(),
+    'headers': test_options(),
+    'initial_settings_frame': test_options(),
+    'head_of_line_blocking': test_options(),
+    'large_metadata': test_options(),
+    'server_registered_method': test_options(),
+    'simple_request': test_options(),
+    'window_overflow': test_options(),
+    'unknown_frame': test_options(),
+}
+
+def grpc_bad_client_tests():
+  native.cc_library(
+      name = 'bad_client_test',
+      srcs = ['bad_client.c'],
+      hdrs = ['bad_client.h'],
+      copts = ['-std=c99'],
+      deps = ['//test/core/util:grpc_test_util', '//:grpc', '//:gpr', '//test/core/end2end:cq_verifier']
+  )
+  for t, topt in BAD_CLIENT_TESTS.items():
+    native.cc_test(
+        name = '%s_bad_client_test' % t,
+        srcs = ['tests/%s.c' % t],
+        deps = [':bad_client_test'],
+        copts = ['-std=c99'],
+    )
+
diff --git a/test/core/bad_client/tests/badreq.c b/test/core/bad_client/tests/badreq.c
index 5d9ffef3f2..7b22f880ab 100644
--- a/test/core/bad_client/tests/badreq.c
+++ b/test/core/bad_client/tests/badreq.c
@@ -46,7 +46,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/connection_prefix.c b/test/core/bad_client/tests/connection_prefix.c
index bc5ed2e393..42787ab90d 100644
--- a/test/core/bad_client/tests/connection_prefix.c
+++ b/test/core/bad_client/tests/connection_prefix.c
@@ -38,7 +38,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/headers.c b/test/core/bad_client/tests/headers.c
index f872e5006a..ab47821760 100644
--- a/test/core/bad_client/tests/headers.c
+++ b/test/core/bad_client/tests/headers.c
@@ -42,7 +42,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/initial_settings_frame.c b/test/core/bad_client/tests/initial_settings_frame.c
index b84b67a7e5..890efd8924 100644
--- a/test/core/bad_client/tests/initial_settings_frame.c
+++ b/test/core/bad_client/tests/initial_settings_frame.c
@@ -41,7 +41,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/large_metadata.c b/test/core/bad_client/tests/large_metadata.c
index 9c804e78c1..f672776a9f 100644
--- a/test/core/bad_client/tests/large_metadata.c
+++ b/test/core/bad_client/tests/large_metadata.c
@@ -126,8 +126,8 @@ static void server_verifier(grpc_server *server, grpc_completion_queue *cq,
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
   cq_verify(cqv);
 
-  GPR_ASSERT(0 == strcmp(call_details.host, "localhost"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo/bar"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.host, "localhost"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo/bar"));
 
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
@@ -153,16 +153,14 @@ static void server_verifier_sends_too_much_metadata(grpc_server *server,
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
   cq_verify(cqv);
 
-  GPR_ASSERT(0 == strcmp(call_details.host, "localhost"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo/bar"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.host, "localhost"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo/bar"));
 
   const size_t metadata_value_size = 16 * 1024;
   grpc_metadata meta;
-  meta.key = "key";
-  meta.value = gpr_malloc(metadata_value_size + 1);
-  memset((char *)meta.value, 'a', metadata_value_size);
-  ((char *)meta.value)[metadata_value_size] = 0;
-  meta.value_length = metadata_value_size;
+  meta.key = grpc_slice_from_static_string("key");
+  meta.value = grpc_slice_malloc(metadata_value_size);
+  memset(GRPC_SLICE_START_PTR(meta.value), 'a', metadata_value_size);
 
   grpc_op op;
   memset(&op, 0, sizeof(op));
@@ -176,7 +174,7 @@ static void server_verifier_sends_too_much_metadata(grpc_server *server,
   CQ_EXPECT_COMPLETION(cqv, tag(102), 0);  // Operation fails.
   cq_verify(cqv);
 
-  gpr_free((char *)meta.value);
+  grpc_slice_unref(meta.value);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
   grpc_call_destroy(s);
@@ -190,29 +188,26 @@ static void client_validator(grpc_slice_buffer *incoming) {
   grpc_slice_buffer_trim_end(incoming, 13, &last_frame_buffer);
   GPR_ASSERT(last_frame_buffer.count == 1);
   grpc_slice last_frame = last_frame_buffer.slices[0];
-  // Construct expected frame.
-  grpc_slice expected = grpc_slice_malloc(13);
-  uint8_t *p = GRPC_SLICE_START_PTR(expected);
-  // Length.
-  *p++ = 0;
-  *p++ = 0;
-  *p++ = 4;
-  // Frame type (RST_STREAM).
-  *p++ = 3;
-  // Flags.
-  *p++ = 0;
+  const uint8_t *p = GRPC_SLICE_START_PTR(last_frame);
+  // Length = 4
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 4);
+  // Frame type (RST_STREAM)
+  GPR_ASSERT(*p++ == 3);
+  // Flags
+  GPR_ASSERT(*p++ == 0);
   // Stream ID.
-  *p++ = 0;
-  *p++ = 0;
-  *p++ = 0;
-  *p++ = 1;
-  // Payload (error code).
-  *p++ = 0;
-  *p++ = 0;
-  *p++ = 0;
-  *p++ = 11;
-  // Compare actual and expected.
-  GPR_ASSERT(grpc_slice_cmp(last_frame, expected) == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 1);
+  // Payload (error code)
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p++ == 0);
+  GPR_ASSERT(*p == 0 || *p == 11);
+
   grpc_slice_buffer_destroy(&last_frame_buffer);
 }
 
diff --git a/test/core/bad_client/tests/simple_request.c b/test/core/bad_client/tests/simple_request.c
index c08aa40a0a..608b849d41 100644
--- a/test/core/bad_client/tests/simple_request.c
+++ b/test/core/bad_client/tests/simple_request.c
@@ -117,8 +117,8 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
   cq_verify(cqv);
 
-  GPR_ASSERT(0 == strcmp(call_details.host, "localhost"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo/bar"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.host, "localhost"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo/bar"));
 
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
@@ -130,7 +130,7 @@ static void failure_verifier(grpc_server *server, grpc_completion_queue *cq,
                              void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/unknown_frame.c b/test/core/bad_client/tests/unknown_frame.c
index 4f483d21f2..1d04699422 100644
--- a/test/core/bad_client/tests/unknown_frame.c
+++ b/test/core/bad_client/tests/unknown_frame.c
@@ -42,7 +42,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_client/tests/window_overflow.c b/test/core/bad_client/tests/window_overflow.c
index 0d17dbe448..7db85906f9 100644
--- a/test/core/bad_client/tests/window_overflow.c
+++ b/test/core/bad_client/tests/window_overflow.c
@@ -61,7 +61,7 @@ static void verifier(grpc_server *server, grpc_completion_queue *cq,
                      void *registered_method) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
-                   cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(20), NULL)
+                   cq, grpc_timeout_milliseconds_to_deadline(20), NULL)
                    .type == GRPC_QUEUE_TIMEOUT);
   }
 }
diff --git a/test/core/bad_ssl/BUILD b/test/core/bad_ssl/BUILD
new file mode 100644
index 0000000000..288788a52d
--- /dev/null
+++ b/test/core/bad_ssl/BUILD
@@ -0,0 +1,34 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load(":generate_tests.bzl", "grpc_bad_ssl_tests")
+
+grpc_bad_ssl_tests()
diff --git a/test/core/bad_ssl/bad_ssl_test.c b/test/core/bad_ssl/bad_ssl_test.c
index f8a9fe6cac..bd85585706 100644
--- a/test/core/bad_ssl/bad_ssl_test.c
+++ b/test/core/bad_ssl/bad_ssl_test.c
@@ -57,11 +57,10 @@ static void run_test(const char *target, size_t nops) {
 
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_status_code status;
   grpc_call_error error;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(5);
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
   cq_verifier *cqv = cq_verifier_create(cq);
 
@@ -80,9 +79,10 @@ static void run_test(const char *target, size_t nops) {
   grpc_metadata_array_init(&trailing_metadata_recv);
 
   channel = grpc_secure_channel_create(ssl_creds, target, &args, NULL);
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr:1234");
   c = grpc_channel_create_call(channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+                               grpc_slice_from_static_string("/foo"), &host,
+                               deadline, NULL);
 
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -95,12 +95,11 @@ static void run_test(const char *target, size_t nops) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -117,7 +116,7 @@ static void run_test(const char *target, size_t nops) {
   GPR_ASSERT(status != GRPC_STATUS_OK);
 
   grpc_call_destroy(c);
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
diff --git a/test/core/bad_ssl/generate_tests.bzl b/test/core/bad_ssl/generate_tests.bzl
new file mode 100755
index 0000000000..78474bc1ca
--- /dev/null
+++ b/test/core/bad_ssl/generate_tests.bzl
@@ -0,0 +1,52 @@
+#!/usr/bin/env python2.7
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+def test_options():
+  return struct()
+
+
+# maps test names to options
+BAD_SSL_TESTS = ['cert', 'alpn']
+
+def grpc_bad_ssl_tests():
+  native.cc_library(
+      name = 'bad_ssl_test_server',
+      srcs = ['server_common.c'],
+      hdrs = ['server_common.h'],
+      deps = ['//test/core/util:grpc_test_util', '//:grpc', '//test/core/end2end:ssl_test_data']
+  )
+  for t in BAD_SSL_TESTS:
+    native.cc_test(
+        name = 'bad_ssl_%s_server' % t,
+        srcs = ['servers/%s.c' % t],
+        deps = [':bad_ssl_test_server'],
+    )
+
diff --git a/test/core/bad_ssl/server_common.c b/test/core/bad_ssl/server_common.c
index 14b1892c2e..6a4313eafd 100644
--- a/test/core/bad_ssl/server_common.c
+++ b/test/core/bad_ssl/server_common.c
@@ -84,7 +84,7 @@ void bad_ssl_run(grpc_server *server) {
       gpr_log(GPR_INFO, "Shutting down due to SIGINT");
       grpc_server_shutdown_and_notify(server, cq, NULL);
       GPR_ASSERT(grpc_completion_queue_pluck(
-                     cq, NULL, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                     cq, NULL, grpc_timeout_seconds_to_deadline(5), NULL)
                      .type == GRPC_OP_COMPLETE);
       grpc_completion_queue_shutdown(cq);
       shutdown_started = 1;
diff --git a/test/core/census/data/context_full.pb b/test/core/census/data/context_full.pb
index 80ebcf280b..7b5895cbf1 100644
--- a/test/core/census/data/context_full.pb
+++ b/test/core/census/data/context_full.pb
diff --git a/test/core/census/data/context_full.txt b/test/core/census/data/context_full.txt
index 7901a10c33..7d8df37ea1 100644
--- a/test/core/census/data/context_full.txt
+++ b/test/core/census/data/context_full.txt
@@ -1,3 +1,4 @@
-trace_id { hi : 5; lo : 1 }
+trace_id_hi : 5
+trace_id_lo : 1
 span_id : 7
-is_sampled : true
+span_options : 1
diff --git a/test/core/census/data/context_no_sample.pb b/test/core/census/data/context_no_sample.pb
deleted file mode 100644
index ab7ad7d109..0000000000
--- a/test/core/census/data/context_no_sample.pb
+++ /dev/null
diff --git a/test/core/census/data/context_no_sample.txt b/test/core/census/data/context_no_sample.txt
deleted file mode 100644
index 150298002f..0000000000
--- a/test/core/census/data/context_no_sample.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-trace_id { hi : 5; lo : 1 }
-span_id : 7
diff --git a/test/core/census/data/context_no_span_options.pb b/test/core/census/data/context_no_span_options.pb
new file mode 100644
index 0000000000..4b3425ac01
--- /dev/null
+++ b/test/core/census/data/context_no_span_options.pb
diff --git a/test/core/census/data/context_no_span_options.txt b/test/core/census/data/context_no_span_options.txt
new file mode 100644
index 0000000000..4c8398ffd0
--- /dev/null
+++ b/test/core/census/data/context_no_span_options.txt
@@ -0,0 +1,3 @@
+trace_id_hi : 5
+trace_id_lo : 1
+span_id : 7
diff --git a/test/core/census/data/context_span_only.pb b/test/core/census/data/context_span_only.pb
index 2a9527a75a..a9315be91a 100644
--- a/test/core/census/data/context_span_only.pb
+++ b/test/core/census/data/context_span_only.pb
diff --git a/test/core/census/data/context_span_only.txt b/test/core/census/data/context_span_only.txt
index d90de2e614..4e473fce53 100644
--- a/test/core/census/data/context_span_only.txt
+++ b/test/core/census/data/context_span_only.txt
@@ -1,2 +1,2 @@
 span_id : 7
-is_sampled : true
+span_options : 1
diff --git a/test/core/census/data/context_trace_only.pb b/test/core/census/data/context_trace_only.pb
index 7fdf6f61a3..aabb325f92 100644
--- a/test/core/census/data/context_trace_only.pb
+++ b/test/core/census/data/context_trace_only.pb
diff --git a/test/core/census/data/context_trace_only.txt b/test/core/census/data/context_trace_only.txt
index 9b68a6aa92..e48a6d7457 100644
--- a/test/core/census/data/context_trace_only.txt
+++ b/test/core/census/data/context_trace_only.txt
@@ -1,2 +1,3 @@
-trace_id { hi : 5; lo : 1 }
-is_sampled : true
+trace_id_hi : 5
+trace_id_lo : 1
+span_options : 1
diff --git a/test/core/census/mlog_test.c b/test/core/census/mlog_test.c
index 36e8a492fd..e2605d1291 100644
--- a/test/core/census/mlog_test.c
+++ b/test/core/census/mlog_test.c
@@ -185,7 +185,7 @@ static void writer_thread(void* arg) {
             "written\n",
             args->index, records_written, args->num_records);
       }
-      gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10));
+      gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(10));
     }
   }
   // Done. Decrement count and signal.
diff --git a/test/core/census/trace_context_test.c b/test/core/census/trace_context_test.c
index ee409e8d1a..5963b1a246 100644
--- a/test/core/census/trace_context_test.c
+++ b/test/core/census/trace_context_test.c
@@ -59,7 +59,6 @@ bool validate_encode_decode_context(google_trace_TraceContext *ctxt1,
                                     uint8_t *buffer, size_t buf_size) {
   google_trace_TraceContext ctxt2 = google_trace_TraceContext_init_zero;
   size_t msg_length;
-  GPR_ASSERT(ctxt1->has_trace_id && ctxt1->has_span_id);
 
   msg_length = encode_trace_context(ctxt1, buffer, buf_size);
   if (msg_length == 0) {
@@ -70,16 +69,17 @@ bool validate_encode_decode_context(google_trace_TraceContext *ctxt1,
     return false;
   }
 
-  if (!ctxt2.has_trace_id || !ctxt2.has_span_id) {
+  if (!ctxt2.has_trace_id_hi || !ctxt2.has_trace_id_lo || !ctxt2.has_span_id) {
     return false;
   }
 
-  GPR_ASSERT(
-      ctxt1->trace_id.hi == ctxt2.trace_id.hi &&
-      ctxt1->trace_id.lo == ctxt2.trace_id.lo &&
-      ctxt1->span_id == ctxt2.span_id &&
-      ctxt1->has_is_sampled == ctxt2.has_is_sampled &&
-      (ctxt1->has_is_sampled ? ctxt1->is_sampled == ctxt2.is_sampled : true));
+  GPR_ASSERT(ctxt1->trace_id_hi == ctxt2.trace_id_hi &&
+             ctxt1->trace_id_lo == ctxt2.trace_id_lo &&
+             ctxt1->span_id == ctxt2.span_id &&
+             ctxt1->has_span_options == ctxt2.has_span_options &&
+             (ctxt1->has_span_options
+                  ? ctxt1->span_options == ctxt2.span_options
+                  : true));
 
   return true;
 }
@@ -94,7 +94,7 @@ bool validate_decode_context(google_trace_TraceContext *ctxt, uint8_t *buffer,
     return false;
   }
 
-  if (!ctxt->has_trace_id || !ctxt->has_span_id) {
+  if (!ctxt->has_trace_id_hi || !ctxt->has_trace_id_lo || !ctxt->has_span_id) {
     return false;
   }
 
@@ -144,49 +144,48 @@ static void test_span_only() {
       &ctxt, "test/core/census/data/context_span_only.pb", false);
 }
 
-// Test proto-buffer without is_sampled value.
-static void test_no_sample() {
+// Test proto-buffer without span_options value.
+static void test_no_span_options() {
   google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero;
   read_and_validate_context_from_file(
-      &ctxt, "test/core/census/data/context_no_sample.pb", true);
-  GPR_ASSERT(ctxt.has_is_sampled == false && ctxt.is_sampled == false);
+      &ctxt, "test/core/census/data/context_no_span_options.pb", true);
+  GPR_ASSERT(ctxt.has_span_options == false && ctxt.span_options == 0);
 }
 
 static void test_encode_decode() {
   uint8_t buffer[BUF_SIZE] = {0};
 
   google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero;
-  ctxt1.has_trace_id = true;
-  ctxt1.trace_id.has_hi = true;
-  ctxt1.trace_id.has_lo = true;
-  ctxt1.trace_id.lo = 1;
-  ctxt1.trace_id.hi = 2;
+  ctxt1.has_trace_id_hi = true;
+  ctxt1.has_trace_id_lo = true;
+  ctxt1.trace_id_lo = 1;
+  ctxt1.trace_id_hi = 2;
   ctxt1.has_span_id = true;
   ctxt1.span_id = 3;
   validate_encode_decode_context(&ctxt1, buffer, sizeof(buffer));
 
+  // Missing trace_id. This should fail.
   google_trace_TraceContext ctxt2 = google_trace_TraceContext_init_zero;
-  ctxt2.has_trace_id = true;
-  ctxt2.trace_id.has_hi = false;
-  ctxt2.trace_id.has_lo = false;
+  ctxt2.has_trace_id_hi = false;
+  ctxt2.has_trace_id_lo = false;
   ctxt2.has_span_id = true;
   validate_encode_decode_context(&ctxt2, buffer, sizeof(buffer));
 }
 
-// Test a corrupted proto-buffer.
+// Test a corrupted proto-buffer. This should fail.
 static void test_corrupt() {
   uint8_t buffer[BUF_SIZE] = {0};
   google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero;
   size_t msg_length;
 
-  ctxt1.has_trace_id = true;
-  ctxt1.trace_id.has_hi = true;
-  ctxt1.trace_id.has_lo = true;
-  ctxt1.trace_id.lo = 1;
-  ctxt1.trace_id.hi = 2;
+  ctxt1.has_trace_id_hi = true;
+  ctxt1.has_trace_id_lo = true;
+  ctxt1.trace_id_lo = 1;
+  ctxt1.trace_id_hi = 2;
   ctxt1.has_span_id = true;
   ctxt1.span_id = 3;
-  ctxt1.is_sampled = true;
+  ctxt1.has_span_options = true;
+  ctxt1.span_options = SPAN_OPTIONS_IS_SAMPLED;
   msg_length = encode_trace_context(&ctxt1, buffer, sizeof(buffer));
 
   /* Corrupt some bytes.  255 (0xFF) should be illegal for the first byte of the
@@ -198,19 +197,19 @@ static void test_corrupt() {
 }
 
 static void test_buffer_size() {
-  // This buffer is too small, so the encode should fail.
+  // This buffer is too small. This should fail.
   uint8_t buffer[16] = {0};
   google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero;
   size_t msg_length;
 
-  ctxt1.has_trace_id = true;
-  ctxt1.trace_id.has_hi = true;
-  ctxt1.trace_id.has_lo = true;
-  ctxt1.trace_id.lo = 1;
-  ctxt1.trace_id.hi = 2;
+  ctxt1.has_trace_id_hi = true;
+  ctxt1.has_trace_id_lo = true;
+  ctxt1.trace_id_lo = 1;
+  ctxt1.trace_id_hi = 2;
   ctxt1.has_span_id = true;
   ctxt1.span_id = 3;
-  ctxt1.is_sampled = true;
+  ctxt1.has_span_options = true;
+  ctxt1.span_options = SPAN_OPTIONS_IS_SAMPLED;
   msg_length = encode_trace_context(&ctxt1, buffer, sizeof(buffer));
 
   GPR_ASSERT(msg_length == 0);
@@ -224,7 +223,7 @@ int main(int argc, char **argv) {
   test_span_only();
   test_encode_decode();
   test_corrupt();
-  test_no_sample();
+  test_no_span_options();
   test_buffer_size();
 
   return 0;
diff --git a/test/core/channel/channel_args_test.c b/test/core/channel/channel_args_test.c
index d3eb969f09..b2c41652a4 100644
--- a/test/core/channel/channel_args_test.c
+++ b/test/core/channel/channel_args_test.c
@@ -37,10 +37,12 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/channel/channel_args.h"
-
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "test/core/util/test_config.h"
 
 static void test_create(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
   grpc_arg arg_int;
   grpc_arg arg_string;
   grpc_arg to_add[2];
@@ -68,10 +70,12 @@ static void test_create(void) {
   GPR_ASSERT(strcmp(ch_args->args[1].value.string, arg_string.value.string) ==
              0);
 
-  grpc_channel_args_destroy(ch_args);
+  grpc_channel_args_destroy(&exec_ctx, ch_args);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_set_compression_algorithm(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_channel_args *ch_args;
 
   ch_args =
@@ -81,10 +85,12 @@ static void test_set_compression_algorithm(void) {
                     GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM) == 0);
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_INTEGER);
 
-  grpc_channel_args_destroy(ch_args);
+  grpc_channel_args_destroy(&exec_ctx, ch_args);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_compression_algorithm_states(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_channel_args *ch_args, *ch_args_wo_gzip, *ch_args_wo_gzip_deflate;
   unsigned states_bitset;
   size_t i;
@@ -100,10 +106,10 @@ static void test_compression_algorithm_states(void) {
 
   /* disable gzip and deflate */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &ch_args, GRPC_COMPRESS_GZIP, 0);
+      &exec_ctx, &ch_args, GRPC_COMPRESS_GZIP, 0);
   GPR_ASSERT(ch_args == ch_args_wo_gzip);
   ch_args_wo_gzip_deflate = grpc_channel_args_compression_algorithm_set_state(
-      &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
+      &exec_ctx, &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -118,7 +124,7 @@ static void test_compression_algorithm_states(void) {
 
   /* re-enabled gzip only */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
+      &exec_ctx, &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -131,7 +137,8 @@ static void test_compression_algorithm_states(void) {
     }
   }
 
-  grpc_channel_args_destroy(ch_args);
+  grpc_channel_args_destroy(&exec_ctx, ch_args);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_set_socket_mutator(void) {
@@ -144,7 +151,11 @@ static void test_set_socket_mutator(void) {
   GPR_ASSERT(strcmp(ch_args->args[0].key, GRPC_ARG_SOCKET_MUTATOR) == 0);
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_POINTER);
 
-  grpc_channel_args_destroy(ch_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, ch_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/channel/channel_stack_test.c b/test/core/channel/channel_stack_test.c
index b43d05eec3..dd9c544524 100644
--- a/test/core/channel/channel_stack_test.c
+++ b/test/core/channel/channel_stack_test.c
@@ -39,6 +39,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
 static grpc_error *channel_init_func(grpc_exec_ctx *exec_ctx,
@@ -120,7 +121,7 @@ static void test_create_channel_stack(void) {
   int *channel_data;
   int *call_data;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdstr *path = grpc_mdstr_from_string("/service/method");
+  grpc_slice path = grpc_slice_from_static_string("/service/method");
 
   arg.type = GRPC_ARG_INTEGER;
   arg.key = "test_key";
@@ -157,8 +158,8 @@ static void test_create_channel_stack(void) {
 
   GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done");
 
+  grpc_slice_unref_internal(&exec_ctx, path);
   grpc_exec_ctx_finish(&exec_ctx);
-  GRPC_MDSTR_UNREF(path);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/client_channel/lb_policies_test.c b/test/core/client_channel/lb_policies_test.c
index 016610763c..057b90ec84 100644
--- a/test/core/client_channel/lb_policies_test.c
+++ b/test/core/client_channel/lb_policies_test.c
@@ -157,8 +157,7 @@ static void kill_server(const servers_fixture *f, size_t i) {
 typedef struct request_data {
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
-  char *details;
-  size_t details_capacity;
+  grpc_slice details;
   grpc_status_code status;
   grpc_call_details *call_details;
 } request_data;
@@ -272,8 +271,6 @@ static request_sequences perform_request(servers_fixture *f,
 
   for (iter_num = 0; iter_num < spec->num_iters; iter_num++) {
     cq_verifier *cqv = cq_verifier_create(f->cq);
-    rdata->details = NULL;
-    rdata->details_capacity = 0;
     was_cancelled = 2;
 
     for (i = 0; i < f->num_servers; i++) {
@@ -294,8 +291,9 @@ static request_sequences perform_request(servers_fixture *f,
     }
     memset(s_valid, 0, f->num_servers * sizeof(int));
 
+    grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
     c = grpc_channel_create_call(client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
-                                 "/foo", "foo.test.google.fr",
+                                 grpc_slice_from_static_string("/foo"), &host,
                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
     GPR_ASSERT(c);
     completed_client = 0;
@@ -312,7 +310,8 @@ static request_sequences perform_request(servers_fixture *f,
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_RECV_INITIAL_METADATA;
-    op->data.recv_initial_metadata = &rdata->initial_metadata_recv;
+    op->data.recv_initial_metadata.recv_initial_metadata =
+        &rdata->initial_metadata_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -321,8 +320,6 @@ static request_sequences perform_request(servers_fixture *f,
         &rdata->trailing_metadata_recv;
     op->data.recv_status_on_client.status = &rdata->status;
     op->data.recv_status_on_client.status_details = &rdata->details;
-    op->data.recv_status_on_client.status_details_capacity =
-        &rdata->details_capacity;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -330,9 +327,10 @@ static request_sequences perform_request(servers_fixture *f,
                grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL));
 
     s_idx = -1;
-    while ((ev = grpc_completion_queue_next(
-                f->cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(RETRY_TIMEOUT), NULL))
-               .type != GRPC_QUEUE_TIMEOUT) {
+    while (
+        (ev = grpc_completion_queue_next(
+             f->cq, grpc_timeout_milliseconds_to_deadline(RETRY_TIMEOUT), NULL))
+            .type != GRPC_QUEUE_TIMEOUT) {
       GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
       read_tag = ((int)(intptr_t)ev.tag);
       const grpc_connectivity_state conn_state =
@@ -365,7 +363,8 @@ static request_sequences perform_request(servers_fixture *f,
       op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
       op->data.send_status_from_server.trailing_metadata_count = 0;
       op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-      op->data.send_status_from_server.status_details = "xyz";
+      grpc_slice status_details = grpc_slice_from_static_string("xyz");
+      op->data.send_status_from_server.status_details = &status_details;
       op->flags = 0;
       op->reserved = NULL;
       op++;
@@ -384,12 +383,12 @@ static request_sequences perform_request(servers_fixture *f,
       }
       cq_verify(cqv);
 
-      gpr_log(GPR_DEBUG, "status=%d; %s", rdata->status, rdata->details);
       GPR_ASSERT(rdata->status == GRPC_STATUS_UNIMPLEMENTED);
-      GPR_ASSERT(0 == strcmp(rdata->details, "xyz"));
-      GPR_ASSERT(0 == strcmp(rdata->call_details[s_idx].method, "/foo"));
+      GPR_ASSERT(0 == grpc_slice_str_cmp(rdata->details, "xyz"));
       GPR_ASSERT(0 ==
-                 strcmp(rdata->call_details[s_idx].host, "foo.test.google.fr"));
+                 grpc_slice_str_cmp(rdata->call_details[s_idx].method, "/foo"));
+      GPR_ASSERT(0 == grpc_slice_str_cmp(rdata->call_details[s_idx].host,
+                                         "foo.test.google.fr"));
       GPR_ASSERT(was_cancelled == 1);
 
       grpc_call_destroy(f->server_calls[s_idx]);
@@ -408,9 +407,10 @@ static request_sequences perform_request(servers_fixture *f,
       }
     }
 
-    GPR_ASSERT(grpc_completion_queue_next(
-                   f->cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(RETRY_TIMEOUT), NULL)
-                   .type == GRPC_QUEUE_TIMEOUT);
+    GPR_ASSERT(
+        grpc_completion_queue_next(
+            f->cq, grpc_timeout_milliseconds_to_deadline(RETRY_TIMEOUT), NULL)
+            .type == GRPC_QUEUE_TIMEOUT);
 
     grpc_metadata_array_destroy(&rdata->initial_metadata_recv);
     grpc_metadata_array_destroy(&rdata->trailing_metadata_recv);
@@ -422,7 +422,7 @@ static request_sequences perform_request(servers_fixture *f,
     for (i = 0; i < f->num_servers; i++) {
       grpc_call_details_destroy(&rdata->call_details[i]);
     }
-    gpr_free(rdata->details);
+    grpc_slice_unref(rdata->details);
   }
 
   gpr_free(s_valid);
@@ -454,10 +454,12 @@ static grpc_call **perform_multirequest(servers_fixture *f,
   op->flags = 0;
   op->reserved = NULL;
 
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
   for (i = 0; i < concurrent_calls; i++) {
-    calls[i] = grpc_channel_create_call(
-        client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq, "/foo",
-        "foo.test.google.fr", gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+    calls[i] =
+        grpc_channel_create_call(client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
+                                 grpc_slice_from_static_string("/foo"), &host,
+                                 gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
     GPR_ASSERT(calls[i]);
     GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(calls[i], ops,
                                                      (size_t)(op - ops), tag(1),
@@ -515,7 +517,7 @@ static grpc_channel *create_client(const servers_fixture *f) {
   grpc_channel *client;
   char *client_hostport;
   char *servers_hostports_str;
-  grpc_arg arg_array[2];
+  grpc_arg arg_array[3];
   grpc_channel_args args;
 
   servers_hostports_str = gpr_strjoin_sep((const char **)f->servers_hostports,
@@ -528,7 +530,10 @@ static grpc_channel *create_client(const servers_fixture *f) {
   arg_array[1].type = GRPC_ARG_STRING;
   arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
   arg_array[1].value.string = "ROUND_ROBIN";
-  args.num_args = 2;
+  arg_array[2].type = GRPC_ARG_INTEGER;
+  arg_array[2].key = GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS;
+  arg_array[2].value.integer = 0;
+  args.num_args = GPR_ARRAY_SIZE(arg_array);
   args.args = arg_array;
 
   client = grpc_insecure_channel_create(client_hostport, &args, NULL);
@@ -563,7 +568,7 @@ static void test_ping() {
      READY is reached */
   while (state != GRPC_CHANNEL_READY) {
     grpc_channel_watch_connectivity_state(
-        client, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), f->cq, tag(99));
+        client, state, grpc_timeout_seconds_to_deadline(3), f->cq, tag(99));
     CQ_EXPECT_COMPLETION(cqv, tag(99), 1);
     cq_verify(cqv);
     state = grpc_channel_check_connectivity_state(client, 0);
@@ -645,7 +650,11 @@ static void test_get_channel_info() {
   arg.value.string = "{\"loadBalancingPolicy\": \"ROUND_ROBIN\"}";
   grpc_channel_args *args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   channel = grpc_insecure_channel_create("ipv4:127.0.0.1:1234", args, NULL);
-  grpc_channel_args_destroy(args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   // Ensures that resolver returns.
   grpc_channel_check_connectivity_state(channel, true /* try_to_connect */);
   // Now request the service config again.
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
index b421720492..cfd37052de 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
@@ -86,7 +86,7 @@ static void on_done(grpc_exec_ctx *exec_ctx, void *ev, grpc_error *error) {
 static bool wait_loop(int deadline_seconds, gpr_event *ev) {
   while (deadline_seconds) {
     gpr_log(GPR_DEBUG, "Test: waiting for %d more seconds", deadline_seconds);
-    if (gpr_event_wait(ev, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1))) return true;
+    if (gpr_event_wait(ev, grpc_timeout_seconds_to_deadline(1))) return true;
     deadline_seconds--;
 
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -108,21 +108,23 @@ int main(int argc, char **argv) {
   grpc_resolver *resolver = create_resolver(&exec_ctx, "dns:test");
   gpr_event ev1;
   gpr_event_init(&ev1);
-  grpc_resolver_next(&exec_ctx, resolver, &result,
-                     grpc_closure_create(on_done, &ev1));
+  grpc_resolver_next(
+      &exec_ctx, resolver, &result,
+      grpc_closure_create(on_done, &ev1, grpc_schedule_on_exec_ctx));
   grpc_exec_ctx_flush(&exec_ctx);
   GPR_ASSERT(wait_loop(5, &ev1));
   GPR_ASSERT(result == NULL);
 
   gpr_event ev2;
   gpr_event_init(&ev2);
-  grpc_resolver_next(&exec_ctx, resolver, &result,
-                     grpc_closure_create(on_done, &ev2));
+  grpc_resolver_next(
+      &exec_ctx, resolver, &result,
+      grpc_closure_create(on_done, &ev2, grpc_schedule_on_exec_ctx));
   grpc_exec_ctx_flush(&exec_ctx);
   GPR_ASSERT(wait_loop(30, &ev2));
   GPR_ASSERT(result != NULL);
 
-  grpc_channel_args_destroy(result);
+  grpc_channel_args_destroy(&exec_ctx, result);
   GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test");
   grpc_exec_ctx_finish(&exec_ctx);
 
diff --git a/test/core/client_channel/resolvers/sockaddr_resolver_test.c b/test/core/client_channel/resolvers/sockaddr_resolver_test.c
index a9fd85aea1..10df78537c 100644
--- a/test/core/client_channel/resolvers/sockaddr_resolver_test.c
+++ b/test/core/client_channel/resolvers/sockaddr_resolver_test.c
@@ -49,7 +49,7 @@ typedef struct on_resolution_arg {
 
 void on_resolution_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   on_resolution_arg *res = arg;
-  grpc_channel_args_destroy(res->resolver_result);
+  grpc_channel_args_destroy(exec_ctx, res->resolver_result);
 }
 
 static void test_succeeds(grpc_resolver_factory *factory, const char *string) {
@@ -68,8 +68,8 @@ static void test_succeeds(grpc_resolver_factory *factory, const char *string) {
   on_resolution_arg on_res_arg;
   memset(&on_res_arg, 0, sizeof(on_res_arg));
   on_res_arg.expected_server_name = uri->path;
-  grpc_closure *on_resolution =
-      grpc_closure_create(on_resolution_cb, &on_res_arg);
+  grpc_closure *on_resolution = grpc_closure_create(
+      on_resolution_cb, &on_res_arg, grpc_schedule_on_exec_ctx);
 
   grpc_resolver_next(&exec_ctx, resolver, &on_res_arg.resolver_result,
                      on_resolution);
diff --git a/test/core/client_channel/set_initial_connect_string_test.c b/test/core/client_channel/set_initial_connect_string_test.c
index 11e57439d5..a0a33667cc 100644
--- a/test/core/client_channel/set_initial_connect_string_test.c
+++ b/test/core/client_channel/set_initial_connect_string_test.c
@@ -81,7 +81,9 @@ static void handle_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
           state.incoming_buffer.length, strlen(magic_connect_string));
   if (state.incoming_buffer.length > strlen(magic_connect_string)) {
     gpr_atm_rel_store(&state.done_atm, 1);
-    grpc_endpoint_shutdown(exec_ctx, state.tcp);
+    grpc_endpoint_shutdown(
+        exec_ctx, state.tcp,
+        GRPC_ERROR_CREATE("Incoming buffer longer than magic_connect_string"));
     grpc_endpoint_destroy(exec_ctx, state.tcp);
   } else {
     grpc_endpoint_read(exec_ctx, state.tcp, &state.temp_incoming_buffer,
@@ -94,7 +96,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
                        grpc_tcp_server_acceptor *acceptor) {
   gpr_free(acceptor);
   test_tcp_server *server = arg;
-  grpc_closure_init(&on_read, handle_read, NULL);
+  grpc_closure_init(&on_read, handle_read, NULL, grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&state.incoming_buffer);
   grpc_slice_buffer_init(&state.temp_incoming_buffer);
   state.tcp = tcp;
@@ -141,9 +143,11 @@ static void start_rpc(int use_creds, int target_port) {
   } else {
     state.channel = grpc_insecure_channel_create(state.target, NULL, NULL);
   }
+  grpc_slice host = grpc_slice_from_static_string("localhost");
   state.call = grpc_channel_create_call(
-      state.channel, NULL, GRPC_PROPAGATE_DEFAULTS, state.cq, "/Service/Method",
-      "localhost", gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+      state.channel, NULL, GRPC_PROPAGATE_DEFAULTS, state.cq,
+      grpc_slice_from_static_string("/Service/Method"), &host,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   memset(&state.op, 0, sizeof(state.op));
   state.op.op = GRPC_OP_SEND_INITIAL_METADATA;
   state.op.data.send_initial_metadata.count = 0;
@@ -158,7 +162,7 @@ static void cleanup_rpc(void) {
   grpc_event ev;
   grpc_slice_buffer_destroy(&state.incoming_buffer);
   grpc_slice_buffer_destroy(&state.temp_incoming_buffer);
-  grpc_channel_credentials_unref(state.creds);
+  grpc_channel_credentials_release(state.creds);
   grpc_call_destroy(state.call);
   grpc_completion_queue_shutdown(state.cq);
   do {
@@ -207,8 +211,7 @@ static void match_initial_magic_string(grpc_slice_buffer *buffer) {
   size_t magic_length = strlen(magic_connect_string);
   GPR_ASSERT(buffer->length >= magic_length);
   for (i = 0, j = 0; i < state.incoming_buffer.count && j < magic_length; i++) {
-    char *dump =
-        grpc_dump_slice(state.incoming_buffer.slices[i], GPR_DUMP_ASCII);
+    char *dump = grpc_slice_to_c_string(state.incoming_buffer.slices[i]);
     cmp_length = GPR_MIN(strlen(dump), magic_length - j);
     GPR_ASSERT(strncmp(dump, magic_connect_string + j, cmp_length) == 0);
     j += cmp_length;
diff --git a/test/core/compression/algorithm_test.c b/test/core/compression/algorithm_test.c
index bdee748ae6..37397ced8d 100644
--- a/test/core/compression/algorithm_test.c
+++ b/test/core/compression/algorithm_test.c
@@ -40,6 +40,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/transport/static_metadata.h"
 #include "test/core/util/test_config.h"
 
@@ -51,29 +52,33 @@ static void test_algorithm_mesh(void) {
   for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
     char *name;
     grpc_compression_algorithm parsed;
-    grpc_mdstr *mdstr;
-    grpc_mdelem *mdelem;
+    grpc_slice mdstr;
+    grpc_mdelem mdelem;
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     GPR_ASSERT(
         grpc_compression_algorithm_name((grpc_compression_algorithm)i, &name));
-    GPR_ASSERT(grpc_compression_algorithm_parse(name, strlen(name), &parsed));
+    GPR_ASSERT(grpc_compression_algorithm_parse(
+        grpc_slice_from_static_string(name), &parsed));
     GPR_ASSERT((int)parsed == i);
-    mdstr = grpc_mdstr_from_string(name);
-    GPR_ASSERT(mdstr == grpc_compression_algorithm_mdstr(parsed));
-    GPR_ASSERT(parsed == grpc_compression_algorithm_from_mdstr(mdstr));
+    mdstr = grpc_slice_from_copied_string(name);
+    GPR_ASSERT(grpc_slice_eq(mdstr, grpc_compression_algorithm_slice(parsed)));
+    GPR_ASSERT(parsed == grpc_compression_algorithm_from_slice(mdstr));
     mdelem = grpc_compression_encoding_mdelem(parsed);
-    GPR_ASSERT(mdelem->value == mdstr);
-    GPR_ASSERT(mdelem->key == GRPC_MDSTR_GRPC_ENCODING);
-    GRPC_MDSTR_UNREF(mdstr);
-    GRPC_MDELEM_UNREF(mdelem);
+    GPR_ASSERT(grpc_slice_eq(GRPC_MDVALUE(mdelem), mdstr));
+    GPR_ASSERT(grpc_slice_eq(GRPC_MDKEY(mdelem), GRPC_MDSTR_GRPC_ENCODING));
+    grpc_slice_unref_internal(&exec_ctx, mdstr);
+    GRPC_MDELEM_UNREF(&exec_ctx, mdelem);
+    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   /* test failure */
-  GPR_ASSERT(NULL ==
-             grpc_compression_encoding_mdelem(GRPC_COMPRESS_ALGORITHMS_COUNT));
+  GPR_ASSERT(GRPC_MDISNULL(
+      grpc_compression_encoding_mdelem(GRPC_COMPRESS_ALGORITHMS_COUNT)));
 }
 
 static void test_algorithm_failure(void) {
-  grpc_mdstr *mdstr;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_slice mdstr;
 
   gpr_log(GPR_DEBUG, "test_algorithm_failure");
 
@@ -81,14 +86,17 @@ static void test_algorithm_failure(void) {
                                              NULL) == 0);
   GPR_ASSERT(grpc_compression_algorithm_name(GRPC_COMPRESS_ALGORITHMS_COUNT + 1,
                                              NULL) == 0);
-  mdstr = grpc_mdstr_from_string("this-is-an-invalid-algorithm");
-  GPR_ASSERT(grpc_compression_algorithm_from_mdstr(mdstr) ==
+  mdstr = grpc_slice_from_static_string("this-is-an-invalid-algorithm");
+  GPR_ASSERT(grpc_compression_algorithm_from_slice(mdstr) ==
              GRPC_COMPRESS_ALGORITHMS_COUNT);
-  GPR_ASSERT(grpc_compression_algorithm_mdstr(GRPC_COMPRESS_ALGORITHMS_COUNT) ==
-             NULL);
-  GPR_ASSERT(grpc_compression_algorithm_mdstr(GRPC_COMPRESS_ALGORITHMS_COUNT +
-                                              1) == NULL);
-  GRPC_MDSTR_UNREF(mdstr);
+  GPR_ASSERT(grpc_slice_eq(
+      grpc_compression_algorithm_slice(GRPC_COMPRESS_ALGORITHMS_COUNT),
+      grpc_empty_slice()));
+  GPR_ASSERT(grpc_slice_eq(
+      grpc_compression_algorithm_slice(GRPC_COMPRESS_ALGORITHMS_COUNT + 1),
+      grpc_empty_slice()));
+  grpc_slice_unref_internal(&exec_ctx, mdstr);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/compression/compression_test.c b/test/core/compression/compression_test.c
index 4c43746e33..7b2e56dc01 100644
--- a/test/core/compression/compression_test.c
+++ b/test/core/compression/compression_test.c
@@ -54,7 +54,7 @@ static void test_compression_algorithm_parse(void) {
     const char *valid_name = valid_names[i];
     grpc_compression_algorithm algorithm;
     const int success = grpc_compression_algorithm_parse(
-        valid_name, strlen(valid_name), &algorithm);
+        grpc_slice_from_static_string(valid_name), &algorithm);
     GPR_ASSERT(success != 0);
     GPR_ASSERT(algorithm == valid_algorithms[i]);
   }
@@ -64,7 +64,7 @@ static void test_compression_algorithm_parse(void) {
     grpc_compression_algorithm algorithm;
     int success;
     success = grpc_compression_algorithm_parse(
-        invalid_name, strlen(invalid_name), &algorithm);
+        grpc_slice_from_static_string(invalid_name), &algorithm);
     GPR_ASSERT(success == 0);
     /* the value of "algorithm" is undefined upon failure */
   }
diff --git a/test/core/compression/message_compress_test.c b/test/core/compression/message_compress_test.c
index fc53cd9d36..246a2b3a71 100644
--- a/test/core/compression/message_compress_test.c
+++ b/test/core/compression/message_compress_test.c
@@ -40,6 +40,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/support/murmur_hash.h"
 #include "test/core/util/slice_splitter.h"
 #include "test/core/util/test_config.h"
@@ -82,7 +83,12 @@ static void assert_passthrough(grpc_slice value,
 
   grpc_split_slices_to_buffer(uncompressed_split_mode, &value, 1, &input);
 
-  was_compressed = grpc_msg_compress(algorithm, &input, &compressed_raw);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    was_compressed =
+        grpc_msg_compress(&exec_ctx, algorithm, &input, &compressed_raw);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   GPR_ASSERT(input.count > 0);
 
   switch (compress_result_check) {
@@ -99,11 +105,16 @@ static void assert_passthrough(grpc_slice value,
 
   grpc_split_slice_buffer(compressed_split_mode, &compressed_raw, &compressed);
 
-  GPR_ASSERT(grpc_msg_decompress(
-      was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed, &output));
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    GPR_ASSERT(grpc_msg_decompress(
+        &exec_ctx, was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed,
+        &output));
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   final = grpc_slice_merge(output.slices, output.count);
-  GPR_ASSERT(0 == grpc_slice_cmp(value, final));
+  GPR_ASSERT(grpc_slice_eq(value, final));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&compressed);
@@ -160,7 +171,9 @@ static void test_tiny_data_compress(void) {
 
   for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
     if (i == GRPC_COMPRESS_NONE) continue;
-    GPR_ASSERT(0 == grpc_msg_compress(i, &input, &output));
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    GPR_ASSERT(0 == grpc_msg_compress(&exec_ctx, i, &input, &output));
+    grpc_exec_ctx_finish(&exec_ctx);
     GPR_ASSERT(1 == output.count);
   }
 
@@ -180,8 +193,9 @@ static void test_bad_decompression_data_crc(void) {
   grpc_slice_buffer_init(&output);
   grpc_slice_buffer_add(&input, create_test_value(ONE_MB_A));
 
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   /* compress it */
-  grpc_msg_compress(GRPC_COMPRESS_GZIP, &input, &corrupted);
+  grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_GZIP, &input, &corrupted);
   /* corrupt the output by smashing the CRC */
   GPR_ASSERT(corrupted.count > 1);
   GPR_ASSERT(GRPC_SLICE_LENGTH(corrupted.slices[1]) > 8);
@@ -189,7 +203,9 @@ static void test_bad_decompression_data_crc(void) {
   memcpy(GRPC_SLICE_START_PTR(corrupted.slices[1]) + idx, &bad, 4);
 
   /* try (and fail) to decompress the corrupted compresed buffer */
-  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_GZIP, &corrupted, &output));
+  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_GZIP, &corrupted,
+                                      &output));
+  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&corrupted);
@@ -208,7 +224,10 @@ static void test_bad_decompression_data_trailing_garbage(void) {
                   "\x78\xda\x63\x60\x60\x60\x00\x00\x00\x04\x00\x01\x99", 13));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
+                                      &output));
+  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -224,7 +243,10 @@ static void test_bad_decompression_data_stream(void) {
                         grpc_slice_from_copied_buffer("\x78\xda\xff\xff", 4));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
+                                      &output));
+  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -239,13 +261,16 @@ static void test_bad_compression_algorithm(void) {
   grpc_slice_buffer_init(&output);
   grpc_slice_buffer_add(
       &input, grpc_slice_from_copied_string("Never gonna give you up"));
-  was_compressed =
-      grpc_msg_compress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
+
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  was_compressed = grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT,
+                                     &input, &output);
   GPR_ASSERT(0 == was_compressed);
 
-  was_compressed =
-      grpc_msg_compress(GRPC_COMPRESS_ALGORITHMS_COUNT + 123, &input, &output);
+  was_compressed = grpc_msg_compress(
+      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT + 123, &input, &output);
   GPR_ASSERT(0 == was_compressed);
+  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -261,13 +286,15 @@ static void test_bad_decompression_algorithm(void) {
   grpc_slice_buffer_add(&input,
                         grpc_slice_from_copied_string(
                             "I'm not really compressed but it doesn't matter"));
-  was_decompressed =
-      grpc_msg_decompress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  was_decompressed = grpc_msg_decompress(
+      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_decompressed);
 
-  was_decompressed = grpc_msg_decompress(GRPC_COMPRESS_ALGORITHMS_COUNT + 123,
-                                         &input, &output);
+  was_decompressed = grpc_msg_decompress(
+      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT + 123, &input, &output);
   GPR_ASSERT(0 == was_decompressed);
+  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
diff --git a/test/core/end2end/BUILD b/test/core/end2end/BUILD
new file mode 100644
index 0000000000..a40fb8e083
--- /dev/null
+++ b/test/core/end2end/BUILD
@@ -0,0 +1,80 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load(":generate_tests.bzl", "grpc_end2end_tests")
+
+cc_library(
+  name = 'cq_verifier',
+  srcs = ['cq_verifier.c'],
+  hdrs = ['cq_verifier.h'],
+  deps = ['//:gpr', '//:grpc', '//test/core/util:grpc_test_util'],
+  copts = ['-std=c99'],
+  visibility = ["//test:__subpackages__"],
+)
+
+cc_library(
+  name = 'ssl_test_data',
+  visibility = ["//test:__subpackages__"],
+  hdrs = ['data/ssl_test_data.h'],
+  copts = ['-std=c99'],
+  srcs = [
+    "data/client_certs.c",
+    "data/server1_cert.c",
+    "data/server1_key.c",
+    "data/test_root_cert.c",
+  ]
+)
+
+cc_library(
+  name = 'fake_resolver',
+  hdrs = ['fake_resolver.h'],
+  srcs = ['fake_resolver.c'],
+  copts = ['-std=c99'],
+  deps = ['//:gpr', '//:grpc', '//test/core/util:grpc_test_util']
+)
+
+cc_library(
+  name = 'http_proxy',
+  hdrs = ['fixtures/http_proxy.h'],
+  srcs = ['fixtures/http_proxy.c'],
+  copts = ['-std=c99'],
+  deps = ['//:gpr', '//:grpc', '//test/core/util:grpc_test_util']
+)
+
+cc_library(
+  name = 'proxy',
+  hdrs = ['fixtures/proxy.h'],
+  srcs = ['fixtures/proxy.c'],
+  copts = ['-std=c99'],
+  deps = ['//:gpr', '//:grpc', '//test/core/util:grpc_test_util']
+)
+
+grpc_end2end_tests()
diff --git a/test/core/end2end/bad_server_response_test.c b/test/core/end2end/bad_server_response_test.c
index 30468558e8..42d960c428 100644
--- a/test/core/end2end/bad_server_response_test.c
+++ b/test/core/end2end/bad_server_response_test.c
@@ -47,6 +47,7 @@
 #include <grpc/support/thd.h>
 
 #include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
@@ -134,7 +135,7 @@ static void handle_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 
   gpr_log(GPR_DEBUG, "got %" PRIuPTR " bytes, expected %" PRIuPTR " bytes",
           state.incoming_data_length, EXPECTED_INCOMING_DATA_LENGTH);
-  if (state.incoming_data_length > EXPECTED_INCOMING_DATA_LENGTH) {
+  if (state.incoming_data_length >= EXPECTED_INCOMING_DATA_LENGTH) {
     handle_write(exec_ctx);
   } else {
     grpc_endpoint_read(exec_ctx, state.tcp, &state.temp_incoming_buffer,
@@ -147,8 +148,8 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
                        grpc_tcp_server_acceptor *acceptor) {
   gpr_free(acceptor);
   test_tcp_server *server = arg;
-  grpc_closure_init(&on_read, handle_read, NULL);
-  grpc_closure_init(&on_write, done_write, NULL);
+  grpc_closure_init(&on_read, handle_read, NULL, grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&on_write, done_write, NULL, grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&state.temp_incoming_buffer);
   grpc_slice_buffer_init(&state.outgoing_buffer);
   state.tcp = tcp;
@@ -171,16 +172,17 @@ static void start_rpc(int target_port, grpc_status_code expected_status,
   grpc_status_code status;
   grpc_call_error error;
   cq_verifier *cqv;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   state.cq = grpc_completion_queue_create(NULL);
   cqv = cq_verifier_create(state.cq);
   gpr_join_host_port(&state.target, "127.0.0.1", target_port);
   state.channel = grpc_insecure_channel_create(state.target, NULL, NULL);
+  grpc_slice host = grpc_slice_from_static_string("localhost");
   state.call = grpc_channel_create_call(
-      state.channel, NULL, GRPC_PROPAGATE_DEFAULTS, state.cq, "/Service/Method",
-      "localhost", gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+      state.channel, NULL, GRPC_PROPAGATE_DEFAULTS, state.cq,
+      grpc_slice_from_static_string("/Service/Method"), &host,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 
   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
@@ -197,7 +199,7 @@ static void start_rpc(int target_port, grpc_status_code expected_status,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -205,7 +207,6 @@ static void start_rpc(int target_port, grpc_status_code expected_status,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -217,20 +218,20 @@ static void start_rpc(int target_port, grpc_status_code expected_status,
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
   cq_verify(cqv);
 
-  gpr_log(GPR_DEBUG, "Rpc status: %d, details: %s", status, details);
   GPR_ASSERT(status == expected_status);
-  GPR_ASSERT(NULL != strstr(details, expected_detail));
+  GPR_ASSERT(-1 != grpc_slice_slice(details, grpc_slice_from_static_string(
+                                                 expected_detail)));
 
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
   cq_verifier_destroy(cqv);
 }
 
-static void cleanup_rpc(void) {
+static void cleanup_rpc(grpc_exec_ctx *exec_ctx) {
   grpc_event ev;
-  grpc_slice_buffer_destroy(&state.temp_incoming_buffer);
-  grpc_slice_buffer_destroy(&state.outgoing_buffer);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &state.temp_incoming_buffer);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &state.outgoing_buffer);
   grpc_call_destroy(state.call);
   grpc_completion_queue_shutdown(state.cq);
   do {
@@ -297,10 +298,11 @@ static void run_test(const char *response_payload,
   gpr_event_wait(&ev, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   /* clean up */
-  grpc_endpoint_shutdown(&exec_ctx, state.tcp);
+  grpc_endpoint_shutdown(&exec_ctx, state.tcp,
+                         GRPC_ERROR_CREATE("Test Shutdown"));
   grpc_endpoint_destroy(&exec_ctx, state.tcp);
+  cleanup_rpc(&exec_ctx);
   grpc_exec_ctx_finish(&exec_ctx);
-  cleanup_rpc();
   test_tcp_server_destroy(&test_server);
 
   grpc_shutdown();
diff --git a/test/core/end2end/connection_refused_test.c b/test/core/end2end/connection_refused_test.c
index 728d6dca59..16a3005539 100644
--- a/test/core/end2end/connection_refused_test.c
+++ b/test/core/end2end/connection_refused_test.c
@@ -40,6 +40,7 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/service_config.h"
 
@@ -52,15 +53,14 @@ static void *tag(intptr_t i) { return (void *)i; }
 static void run_test(bool wait_for_ready, bool use_service_config) {
   grpc_channel *chan;
   grpc_call *call;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(2);
   grpc_completion_queue *cq;
   cq_verifier *cqv;
   grpc_op ops[6];
   grpc_op *op;
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   gpr_log(GPR_INFO, "TEST: wait_for_ready=%d use_service_config=%d",
           wait_for_ready, use_service_config);
@@ -97,9 +97,10 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
   gpr_join_host_port(&addr, "127.0.0.1", port);
   gpr_log(GPR_INFO, "server: %s", addr);
   chan = grpc_insecure_channel_create(addr, args, NULL);
-  call = grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                                  "/service/method", "nonexistant", deadline,
-                                  NULL);
+  grpc_slice host = grpc_slice_from_static_string("nonexistant");
+  call = grpc_channel_create_call(
+      chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+      grpc_slice_from_static_string("/service/method"), &host, deadline, NULL);
 
   gpr_free(addr);
 
@@ -116,7 +117,6 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -142,10 +142,14 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
   grpc_channel_destroy(chan);
   cq_verifier_destroy(cqv);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
-  if (args != NULL) grpc_channel_args_destroy(args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    if (args != NULL) grpc_channel_args_destroy(&exec_ctx, args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   grpc_shutdown();
 }
diff --git a/test/core/end2end/cq_verifier.c b/test/core/end2end/cq_verifier.c
index 57373970c4..9b0106ec84 100644
--- a/test/core/end2end/cq_verifier.c
+++ b/test/core/end2end/cq_verifier.c
@@ -92,8 +92,8 @@ static int has_metadata(const grpc_metadata *md, size_t count, const char *key,
                         const char *value) {
   size_t i;
   for (i = 0; i < count; i++) {
-    if (0 == strcmp(key, md[i].key) && strlen(value) == md[i].value_length &&
-        0 == memcmp(md[i].value, value, md[i].value_length)) {
+    if (0 == grpc_slice_str_cmp(md[i].key, key) &&
+        0 == grpc_slice_str_cmp(md[i].value, value)) {
       return 1;
     }
   }
@@ -105,6 +105,22 @@ int contains_metadata(grpc_metadata_array *array, const char *key,
   return has_metadata(array->metadata, array->count, key, value);
 }
 
+static int has_metadata_slices(const grpc_metadata *md, size_t count,
+                               grpc_slice key, grpc_slice value) {
+  size_t i;
+  for (i = 0; i < count; i++) {
+    if (grpc_slice_eq(md[i].key, key) && grpc_slice_eq(md[i].value, value)) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
+int contains_metadata_slices(grpc_metadata_array *array, grpc_slice key,
+                             grpc_slice value) {
+  return has_metadata_slices(array->metadata, array->count, key, value);
+}
+
 static grpc_slice merge_slices(grpc_slice *slices, size_t nslices) {
   size_t i;
   size_t len = 0;
@@ -233,7 +249,7 @@ static void fail_no_event_received(cq_verifier *v) {
 }
 
 void cq_verify(cq_verifier *v) {
-  const gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+  const gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   while (v->first_expectation != NULL) {
     grpc_event ev = grpc_completion_queue_next(v->cq, deadline, NULL);
     if (ev.type == GRPC_QUEUE_TIMEOUT) {
diff --git a/test/core/end2end/cq_verifier.h b/test/core/end2end/cq_verifier.h
index b754de9bbe..035aa270e4 100644
--- a/test/core/end2end/cq_verifier.h
+++ b/test/core/end2end/cq_verifier.h
@@ -71,5 +71,7 @@ int byte_buffer_eq_slice(grpc_byte_buffer *bb, grpc_slice b);
 int byte_buffer_eq_string(grpc_byte_buffer *byte_buffer, const char *string);
 int contains_metadata(grpc_metadata_array *array, const char *key,
                       const char *value);
+int contains_metadata_slices(grpc_metadata_array *array, grpc_slice key,
+                             grpc_slice value);
 
 #endif /* GRPC_TEST_CORE_END2END_CQ_VERIFIER_H */
diff --git a/test/core/end2end/cq_verifier_native.c b/test/core/end2end/cq_verifier_native.c
index b1fcb4beed..e0f1d79e83 100644
--- a/test/core/end2end/cq_verifier_native.c
+++ b/test/core/end2end/cq_verifier_native.c
@@ -67,7 +67,7 @@ void cq_verifier_set_first_expectation(cq_verifier *v, expectation *e) {
 
 grpc_event cq_verifier_next_event(cq_verifier *v, int timeout_seconds) {
   const gpr_timespec deadline =
-      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(timeout_seconds);
+      grpc_timeout_seconds_to_deadline(timeout_seconds);
   return grpc_completion_queue_next(v->cq, deadline, NULL);
 }
 
diff --git a/test/core/end2end/data/ssl_test_data.h b/test/core/end2end/data/ssl_test_data.h
index 4a64af1e27..0b274e0d95 100644
--- a/test/core/end2end/data/ssl_test_data.h
+++ b/test/core/end2end/data/ssl_test_data.h
@@ -34,6 +34,10 @@
 #ifndef GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H
 #define GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern const char test_root_cert[];
 extern const char test_server1_cert[];
 extern const char test_server1_key[];
@@ -42,4 +46,8 @@ extern const char test_self_signed_client_key[];
 extern const char test_signed_client_cert[];
 extern const char test_signed_client_key[];
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H */
diff --git a/test/core/end2end/dualstack_socket_test.c b/test/core/end2end/dualstack_socket_test.c
index 11e8604f56..3623bd7be8 100644
--- a/test/core/end2end/dualstack_socket_test.c
+++ b/test/core/end2end/dualstack_socket_test.c
@@ -57,7 +57,7 @@
 static void *tag(intptr_t i) { return (void *)i; }
 
 static gpr_timespec ms_from_now(int ms) {
-  return GRPC_TIMEOUT_MILLIS_TO_DEADLINE(ms);
+  return grpc_timeout_milliseconds_to_deadline(ms);
 }
 
 static void drain_cq(grpc_completion_queue *cq) {
@@ -88,8 +88,7 @@ void test_connect(const char *server_host, const char *client_host, int port,
   grpc_metadata_array request_metadata_recv;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   grpc_call_details call_details;
   char *peer;
@@ -135,7 +134,7 @@ void test_connect(const char *server_host, const char *client_host, int port,
     grpc_slice_split(uri_slice, ",", &uri_parts);
     hosts_with_port = gpr_malloc(sizeof(char *) * uri_parts.count);
     for (i = 0; i < uri_parts.count; i++) {
-      char *uri_part_str = grpc_dump_slice(uri_parts.slices[i], GPR_DUMP_ASCII);
+      char *uri_part_str = grpc_slice_to_c_string(uri_parts.slices[i]);
       gpr_asprintf(&hosts_with_port[i], "%s:%d", uri_part_str, port);
       gpr_free(uri_part_str);
     }
@@ -168,8 +167,10 @@ void test_connect(const char *server_host, const char *client_host, int port,
   }
 
   /* Send a trivial request. */
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
   c = grpc_channel_create_call(client, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+                               grpc_slice_from_static_string("/foo"), &host,
+                               deadline, NULL);
   GPR_ASSERT(c);
 
   memset(ops, 0, sizeof(ops));
@@ -184,7 +185,7 @@ void test_connect(const char *server_host, const char *client_host, int port,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -192,7 +193,6 @@ void test_connect(const char *server_host, const char *client_host, int port,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -216,7 +216,8 @@ void test_connect(const char *server_host, const char *client_host, int port,
     op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
     op->data.send_status_from_server.trailing_metadata_count = 0;
     op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-    op->data.send_status_from_server.status_details = "xyz";
+    grpc_slice status_details = grpc_slice_from_static_string("xyz");
+    op->data.send_status_from_server.status_details = &status_details;
     op->flags = 0;
     op++;
     op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
@@ -235,9 +236,10 @@ void test_connect(const char *server_host, const char *client_host, int port,
     gpr_free(peer);
 
     GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-    GPR_ASSERT(0 == strcmp(details, "xyz"));
-    GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-    GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+    GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+    GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
+    GPR_ASSERT(0 ==
+               grpc_slice_str_cmp(call_details.host, "foo.test.google.fr"));
     GPR_ASSERT(was_cancelled == 1);
 
     grpc_call_destroy(s);
@@ -259,7 +261,7 @@ void test_connect(const char *server_host, const char *client_host, int port,
   /* Destroy server. */
   grpc_server_shutdown_and_notify(server, cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(server);
   grpc_completion_queue_shutdown(cq);
@@ -271,7 +273,7 @@ void test_connect(const char *server_host, const char *client_host, int port,
   grpc_metadata_array_destroy(&request_metadata_recv);
 
   grpc_call_details_destroy(&call_details);
-  gpr_free(details);
+  grpc_slice_unref(details);
   if (picked_port) {
     grpc_recycle_unused_port(port);
   }
diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index 663489082f..fdfa31b5fb 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -41,6 +41,8 @@
 
 #include <grpc/support/log.h>
 
+#include "test/core/util/debugger_macros.h"
+
 static bool g_pre_init_called = false;
 
 extern void authority_not_supported(grpc_end2end_test_config config);
@@ -135,10 +137,15 @@ extern void streaming_error_response(grpc_end2end_test_config config);
 extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
+extern void write_buffering(grpc_end2end_test_config config);
+extern void write_buffering_pre_init(void);
+extern void write_buffering_at_end(grpc_end2end_test_config config);
+extern void write_buffering_at_end_pre_init(void);
 
 void grpc_end2end_tests_pre_init(void) {
   GPR_ASSERT(!g_pre_init_called);
   g_pre_init_called = true;
+  grpc_summon_debugger_macros();
   authority_not_supported_pre_init();
   bad_hostname_pre_init();
   binary_metadata_pre_init();
@@ -185,6 +192,8 @@ void grpc_end2end_tests_pre_init(void) {
   simple_request_pre_init();
   streaming_error_response_pre_init();
   trailing_metadata_pre_init();
+  write_buffering_pre_init();
+  write_buffering_at_end_pre_init();
 }
 
 void grpc_end2end_tests(int argc, char **argv,
@@ -240,6 +249,8 @@ void grpc_end2end_tests(int argc, char **argv,
     simple_request(config);
     streaming_error_response(config);
     trailing_metadata(config);
+    write_buffering(config);
+    write_buffering_at_end(config);
     return;
   }
 
@@ -428,6 +439,14 @@ void grpc_end2end_tests(int argc, char **argv,
       trailing_metadata(config);
       continue;
     }
+    if (0 == strcmp("write_buffering", argv[i])) {
+      write_buffering(config);
+      continue;
+    }
+    if (0 == strcmp("write_buffering_at_end", argv[i])) {
+      write_buffering_at_end(config);
+      continue;
+    }
     gpr_log(GPR_DEBUG, "not a test: '%s'", argv[i]);
     abort();
   }
diff --git a/test/core/end2end/end2end_test.sh b/test/core/end2end/end2end_test.sh
new file mode 100755
index 0000000000..f2309acc88
--- /dev/null
+++ b/test/core/end2end/end2end_test.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# Test runner for end2end tests from bazel
+
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+$1 $2
diff --git a/test/core/end2end/end2end_test_utils.c b/test/core/end2end/end2end_test_utils.c
index 46fb4ec1af..8783d8451b 100644
--- a/test/core/end2end/end2end_test_utils.c
+++ b/test/core/end2end/end2end_test_utils.c
@@ -39,13 +39,27 @@
 
 const char *get_host_override_string(const char *str,
                                      grpc_end2end_test_config config) {
-  return (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER ? str
-                                                                       : NULL);
+  if (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER) {
+    return str;
+  } else {
+    return NULL;
+  }
+}
+
+const grpc_slice *get_host_override_slice(const char *str,
+                                          grpc_end2end_test_config config) {
+  const char *r = get_host_override_string(str, config);
+  if (r != NULL) {
+    static grpc_slice ret;
+    ret = grpc_slice_from_static_string(r);
+    return &ret;
+  }
+  return NULL;
 }
 
-void validate_host_override_string(const char *pattern, const char *str,
+void validate_host_override_string(const char *pattern, grpc_slice str,
                                    grpc_end2end_test_config config) {
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER) {
-    GPR_ASSERT(0 == strcmp(str, pattern));
+    GPR_ASSERT(0 == grpc_slice_str_cmp(str, pattern));
   }
 }
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.c
index 25c7c62fde..f529d6a899 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.c
@@ -41,6 +41,8 @@
 
 #include <grpc/support/log.h>
 
+#include "test/core/util/debugger_macros.h"
+
 static bool g_pre_init_called = false;
 
 extern void authority_not_supported(grpc_end2end_test_config config);
@@ -137,10 +139,15 @@ extern void streaming_error_response(grpc_end2end_test_config config);
 extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
+extern void write_buffering(grpc_end2end_test_config config);
+extern void write_buffering_pre_init(void);
+extern void write_buffering_at_end(grpc_end2end_test_config config);
+extern void write_buffering_at_end_pre_init(void);
 
 void grpc_end2end_tests_pre_init(void) {
   GPR_ASSERT(!g_pre_init_called);
   g_pre_init_called = true;
+  grpc_summon_debugger_macros();
   authority_not_supported_pre_init();
   bad_hostname_pre_init();
   binary_metadata_pre_init();
@@ -188,6 +195,8 @@ void grpc_end2end_tests_pre_init(void) {
   simple_request_pre_init();
   streaming_error_response_pre_init();
   trailing_metadata_pre_init();
+  write_buffering_pre_init();
+  write_buffering_at_end_pre_init();
 }
 
 void grpc_end2end_tests(int argc, char **argv,
@@ -244,6 +253,8 @@ void grpc_end2end_tests(int argc, char **argv,
     simple_request(config);
     streaming_error_response(config);
     trailing_metadata(config);
+    write_buffering(config);
+    write_buffering_at_end(config);
     return;
   }
 
@@ -436,6 +447,14 @@ void grpc_end2end_tests(int argc, char **argv,
       trailing_metadata(config);
       continue;
     }
+    if (0 == strcmp("write_buffering", argv[i])) {
+      write_buffering(config);
+      continue;
+    }
+    if (0 == strcmp("write_buffering_at_end", argv[i])) {
+      write_buffering_at_end(config);
+      continue;
+    }
     gpr_log(GPR_DEBUG, "not a test: '%s'", argv[i]);
     abort();
   }
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index f25e90b5f6..cb0afd9cd9 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -72,8 +72,12 @@ void grpc_end2end_tests(int argc, char **argv, grpc_end2end_test_config config);
 
 const char *get_host_override_string(const char *str,
                                      grpc_end2end_test_config config);
+/* Returns a pointer to a statically allocated slice: future invocations
+   overwrite past invocations, not threadsafe, etc... */
+const grpc_slice *get_host_override_slice(const char *str,
+                                          grpc_end2end_test_config config);
 
-void validate_host_override_string(const char *pattern, const char *str,
+void validate_host_override_string(const char *pattern, grpc_slice str,
                                    grpc_end2end_test_config config);
 
 #endif /* GRPC_TEST_CORE_END2END_END2END_TESTS_H */
diff --git a/test/core/end2end/fake_resolver.c b/test/core/end2end/fake_resolver.c
index ed85030797..4f05f69f01 100644
--- a/test/core/end2end/fake_resolver.c
+++ b/test/core/end2end/fake_resolver.c
@@ -48,6 +48,7 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
@@ -76,8 +77,8 @@ typedef struct {
 static void fake_resolver_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
   fake_resolver* r = (fake_resolver*)gr;
   gpr_mu_destroy(&r->mu);
-  grpc_channel_args_destroy(r->channel_args);
-  grpc_lb_addresses_destroy(r->addresses);
+  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_lb_addresses_destroy(exec_ctx, r->addresses);
   gpr_free(r);
 }
 
@@ -87,7 +88,7 @@ static void fake_resolver_shutdown(grpc_exec_ctx* exec_ctx,
   gpr_mu_lock(&r->mu);
   if (r->next_completion != NULL) {
     *r->target_result = NULL;
-    grpc_exec_ctx_sched(exec_ctx, r->next_completion, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = NULL;
   }
   gpr_mu_unlock(&r->mu);
@@ -100,7 +101,7 @@ static void fake_resolver_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
     grpc_arg arg = grpc_lb_addresses_create_channel_arg(r->addresses);
     *r->target_result =
         grpc_channel_args_copy_and_add(r->channel_args, &arg, 1);
-    grpc_exec_ctx_sched(exec_ctx, r->next_completion, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = NULL;
   }
 }
@@ -153,30 +154,57 @@ static grpc_resolver* fake_resolver_create(grpc_exec_ctx* exec_ctx,
       grpc_uri_get_query_arg(args->uri, "lb_enabled");
   const bool lb_enabled =
       lb_enabled_qpart != NULL && strcmp("0", lb_enabled_qpart) != 0;
+
+  // Get the balancer's names.
+  const char* balancer_names =
+      grpc_uri_get_query_arg(args->uri, "balancer_names");
+  grpc_slice_buffer balancer_names_parts;
+  grpc_slice_buffer_init(&balancer_names_parts);
+  if (balancer_names != NULL) {
+    const grpc_slice balancer_names_slice =
+        grpc_slice_from_copied_string(balancer_names);
+    grpc_slice_split(balancer_names_slice, ",", &balancer_names_parts);
+    grpc_slice_unref(balancer_names_slice);
+  }
+
   // Construct addresses.
   grpc_slice path_slice =
       grpc_slice_new(args->uri->path, strlen(args->uri->path), do_nothing);
   grpc_slice_buffer path_parts;
   grpc_slice_buffer_init(&path_parts);
   grpc_slice_split(path_slice, ",", &path_parts);
+  if (balancer_names_parts.count > 0 &&
+      path_parts.count != balancer_names_parts.count) {
+    gpr_log(GPR_ERROR,
+            "Balancer names present but mismatched with number of addresses: "
+            "%lu balancer names != %lu addresses",
+            (unsigned long)balancer_names_parts.count,
+            (unsigned long)path_parts.count);
+    return NULL;
+  }
   grpc_lb_addresses* addresses =
       grpc_lb_addresses_create(path_parts.count, NULL /* user_data_vtable */);
   bool errors_found = false;
   for (size_t i = 0; i < addresses->num_addresses; i++) {
     grpc_uri ith_uri = *args->uri;
-    char* part_str = grpc_dump_slice(path_parts.slices[i], GPR_DUMP_ASCII);
+    char* part_str = grpc_slice_to_c_string(path_parts.slices[i]);
     ith_uri.path = part_str;
     if (!parse_ipv4(&ith_uri, &addresses->addresses[i].address)) {
       errors_found = true;
     }
     gpr_free(part_str);
-    addresses->addresses[i].is_balancer = lb_enabled;
     if (errors_found) break;
+    addresses->addresses[i].is_balancer = lb_enabled;
+    addresses->addresses[i].balancer_name =
+        balancer_names_parts.count > 0
+            ? grpc_dump_slice(balancer_names_parts.slices[i], GPR_DUMP_ASCII)
+            : NULL;
   }
-  grpc_slice_buffer_destroy(&path_parts);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &path_parts);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &balancer_names_parts);
   grpc_slice_unref(path_slice);
   if (errors_found) {
-    grpc_lb_addresses_destroy(addresses);
+    grpc_lb_addresses_destroy(exec_ctx, addresses);
     return NULL;
   }
   // Instantiate resolver.
diff --git a/test/core/end2end/fixtures/h2_census.c b/test/core/end2end/fixtures/h2_census.c
index c52d7660f5..8e60123ed6 100644
--- a/test/core/end2end/fixtures/h2_census.c
+++ b/test/core/end2end/fixtures/h2_census.c
@@ -85,7 +85,11 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
   client_args = grpc_channel_args_copy_and_add(client_args, &arg, 1);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
-  grpc_channel_args_destroy(client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
@@ -97,7 +101,11 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
   }
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, NULL);
-  grpc_channel_args_destroy(server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
   grpc_server_start(f->server);
diff --git a/test/core/end2end/fixtures/h2_compress.c b/test/core/end2end/fixtures/h2_compress.c
index fedd2ebc46..c01e45664b 100644
--- a/test/core/end2end/fixtures/h2_compress.c
+++ b/test/core/end2end/fixtures/h2_compress.c
@@ -78,7 +78,9 @@ void chttp2_init_client_fullstack_compression(grpc_end2end_test_fixture *f,
                                               grpc_channel_args *client_args) {
   fullstack_compression_fixture_data *ffd = f->fixture_data;
   if (ffd->client_args_compression != NULL) {
-    grpc_channel_args_destroy(ffd->client_args_compression);
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
+    grpc_exec_ctx_finish(&exec_ctx);
   }
   ffd->client_args_compression = grpc_channel_args_set_compression_algorithm(
       client_args, GRPC_COMPRESS_GZIP);
@@ -90,7 +92,9 @@ void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture *f,
                                               grpc_channel_args *server_args) {
   fullstack_compression_fixture_data *ffd = f->fixture_data;
   if (ffd->server_args_compression != NULL) {
-    grpc_channel_args_destroy(ffd->server_args_compression);
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
+    grpc_exec_ctx_finish(&exec_ctx);
   }
   ffd->server_args_compression = grpc_channel_args_set_compression_algorithm(
       server_args, GRPC_COMPRESS_GZIP);
@@ -104,11 +108,13 @@ void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack_compression(grpc_end2end_test_fixture *f) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   fullstack_compression_fixture_data *ffd = f->fixture_data;
-  grpc_channel_args_destroy(ffd->client_args_compression);
-  grpc_channel_args_destroy(ffd->server_args_compression);
+  grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
+  grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* All test configurations */
diff --git a/test/core/end2end/fixtures/h2_full+trace.c b/test/core/end2end/fixtures/h2_full+trace.c
index 11a102a576..01316376e0 100644
--- a/test/core/end2end/fixtures/h2_full+trace.c
+++ b/test/core/end2end/fixtures/h2_full+trace.c
@@ -117,9 +117,9 @@ int main(int argc, char **argv) {
   gpr_setenv("GRPC_TRACE", "doesnt-exist,http,all");
 
 #ifdef GRPC_POSIX_SOCKET
-  g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10.0 : 1.0;
+  g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10 : 1;
 #else
-  g_fixture_slowdown_factor = 10.0;
+  g_fixture_slowdown_factor = 10;
 #endif
 
   grpc_test_init(argc, argv);
diff --git a/test/core/end2end/fixtures/h2_load_reporting.c b/test/core/end2end/fixtures/h2_load_reporting.c
index 7a76489b44..38321f34db 100644
--- a/test/core/end2end/fixtures/h2_load_reporting.c
+++ b/test/core/end2end/fixtures/h2_load_reporting.c
@@ -88,7 +88,11 @@ void chttp2_init_server_load_reporting(grpc_end2end_test_fixture *f,
   }
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, NULL);
-  grpc_channel_args_destroy(server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
   grpc_server_start(f->server);
diff --git a/test/core/end2end/fixtures/h2_oauth2.c b/test/core/end2end/fixtures/h2_oauth2.c
index 6122f4f2f9..3351652858 100644
--- a/test/core/end2end/fixtures/h2_oauth2.c
+++ b/test/core/end2end/fixtures/h2_oauth2.c
@@ -59,8 +59,8 @@ static const grpc_metadata *find_metadata(const grpc_metadata *md,
                                           const char *value) {
   size_t i;
   for (i = 0; i < md_count; i++) {
-    if (strcmp(key, md[i].key) == 0 && strlen(value) == md[i].value_length &&
-        memcmp(md[i].value, value, md[i].value_length) == 0) {
+    if (grpc_slice_str_cmp(md[i].key, key) == 0 &&
+        grpc_slice_str_cmp(md[i].value, value) == 0) {
       return &md[i];
     }
   }
@@ -74,7 +74,7 @@ static void process_oauth2_success(void *state, grpc_auth_context *ctx,
                                    grpc_process_auth_metadata_done_cb cb,
                                    void *user_data) {
   const grpc_metadata *oauth2 =
-      find_metadata(md, md_count, "Authorization", oauth2_md);
+      find_metadata(md, md_count, "authorization", oauth2_md);
   test_processor_state *s;
 
   GPR_ASSERT(state != NULL);
@@ -93,7 +93,7 @@ static void process_oauth2_failure(void *state, grpc_auth_context *ctx,
                                    grpc_process_auth_metadata_done_cb cb,
                                    void *user_data) {
   const grpc_metadata *oauth2 =
-      find_metadata(md, md_count, "Authorization", oauth2_md);
+      find_metadata(md, md_count, "authorization", oauth2_md);
   test_processor_state *s;
   GPR_ASSERT(state != NULL);
   s = (test_processor_state *)state;
@@ -154,7 +154,7 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL, NULL);
   grpc_call_credentials *oauth2_creds =
-      grpc_md_only_test_credentials_create("Authorization", oauth2_md, 1);
+      grpc_md_only_test_credentials_create("authorization", oauth2_md, 1);
   grpc_channel_credentials *ssl_oauth2_creds =
       grpc_composite_channel_credentials_create(ssl_creds, oauth2_creds, NULL);
   grpc_arg ssl_name_override = {GRPC_ARG_STRING,
@@ -163,7 +163,11 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_oauth2_creds);
-  grpc_channel_args_destroy(new_client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, new_client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   grpc_channel_credentials_release(ssl_creds);
   grpc_call_credentials_release(oauth2_creds);
 }
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.c b/test/core/end2end/fixtures/h2_sockpair+trace.c
index 726ed8735c..edf42a4070 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.c
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.c
@@ -154,9 +154,9 @@ int main(int argc, char **argv) {
      code paths in trace.c to be taken */
   gpr_setenv("GRPC_TRACE", "doesnt-exist,http,all");
 #ifdef GRPC_POSIX_SOCKET
-  g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10.0 : 1.0;
+  g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10 : 1;
 #else
-  g_fixture_slowdown_factor = 10.0;
+  g_fixture_slowdown_factor = 10;
 #endif
 
   grpc_test_init(argc, argv);
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.c b/test/core/end2end/fixtures/h2_sockpair_1byte.c
index 11af7bee1e..6f9cf8fe26 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.c
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.c
@@ -144,7 +144,7 @@ static grpc_end2end_test_config configs[] = {
 int main(int argc, char **argv) {
   size_t i;
 
-  g_fixture_slowdown_factor = 2.0;
+  g_fixture_slowdown_factor = 2;
 
   grpc_test_init(argc, argv);
   grpc_end2end_tests_pre_init();
diff --git a/test/core/end2end/fixtures/h2_ssl.c b/test/core/end2end/fixtures/h2_ssl.c
index bbd522cf30..cf44cd093c 100644
--- a/test/core/end2end/fixtures/h2_ssl.c
+++ b/test/core/end2end/fixtures/h2_ssl.c
@@ -118,7 +118,11 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
-  grpc_channel_args_destroy(new_client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, new_client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 static int fail_server_auth_check(grpc_channel_args *server_args) {
diff --git a/test/core/end2end/fixtures/h2_ssl_cert.c b/test/core/end2end/fixtures/h2_ssl_cert.c
index e39cb491de..f62331eea3 100644
--- a/test/core/end2end/fixtures/h2_ssl_cert.c
+++ b/test/core/end2end/fixtures/h2_ssl_cert.c
@@ -186,7 +186,11 @@ typedef enum { NONE, SELF_SIGNED, SIGNED, BAD_CERT_PAIR } certtype;
     grpc_channel_args *new_client_args =                                     \
         grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);  \
     chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);      \
-    grpc_channel_args_destroy(new_client_args);                              \
+    {                                                                        \
+      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;                           \
+      grpc_channel_args_destroy(&exec_ctx, new_client_args);                 \
+      grpc_exec_ctx_finish(&exec_ctx);                                       \
+    }                                                                        \
   }
 
 CLIENT_INIT(NONE)
@@ -271,7 +275,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -287,7 +291,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -317,9 +321,10 @@ static void simple_request_body(grpc_end2end_test_fixture f,
   grpc_op *op;
   grpc_call_error error;
 
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr:1234");
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr:1234", deadline,
-                               NULL);
+                               grpc_slice_from_static_string("/foo"), &host,
+                               deadline, NULL);
   GPR_ASSERT(c);
 
   memset(ops, 0, sizeof(ops));
diff --git a/test/core/end2end/fixtures/h2_ssl_proxy.c b/test/core/end2end/fixtures/h2_ssl_proxy.c
index 27cf3ebf32..740b075bf6 100644
--- a/test/core/end2end/fixtures/h2_ssl_proxy.c
+++ b/test/core/end2end/fixtures/h2_ssl_proxy.c
@@ -79,7 +79,11 @@ static grpc_channel *create_proxy_client(const char *target,
   channel =
       grpc_secure_channel_create(ssl_creds, target, new_client_args, NULL);
   grpc_channel_credentials_release(ssl_creds);
-  grpc_channel_args_destroy(new_client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, new_client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   return channel;
 }
 
@@ -151,7 +155,11 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
-  grpc_channel_args_destroy(new_client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, new_client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 static int fail_server_auth_check(grpc_channel_args *server_args) {
diff --git a/test/core/end2end/fixtures/http_proxy.c b/test/core/end2end/fixtures/http_proxy.c
index 80865fc7a6..6fdc86fc12 100644
--- a/test/core/end2end/fixtures/http_proxy.c
+++ b/test/core/end2end/fixtures/http_proxy.c
@@ -59,6 +59,7 @@
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/iomgr/tcp_server.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/port.h"
 
 struct grpc_end2end_http_proxy {
@@ -110,12 +111,14 @@ static void proxy_connection_unref(grpc_exec_ctx* exec_ctx,
     if (conn->server_endpoint != NULL)
       grpc_endpoint_destroy(exec_ctx, conn->server_endpoint);
     grpc_pollset_set_destroy(conn->pollset_set);
-    grpc_slice_buffer_destroy(&conn->client_read_buffer);
-    grpc_slice_buffer_destroy(&conn->client_deferred_write_buffer);
-    grpc_slice_buffer_destroy(&conn->client_write_buffer);
-    grpc_slice_buffer_destroy(&conn->server_read_buffer);
-    grpc_slice_buffer_destroy(&conn->server_deferred_write_buffer);
-    grpc_slice_buffer_destroy(&conn->server_write_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_read_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx,
+                                       &conn->client_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_write_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_read_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx,
+                                       &conn->server_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_write_buffer);
     grpc_http_parser_destroy(&conn->http_parser);
     grpc_http_request_destroy(&conn->http_request);
     gpr_free(conn);
@@ -129,10 +132,13 @@ static void proxy_connection_failed(grpc_exec_ctx* exec_ctx,
                                     const char* prefix, grpc_error* error) {
   const char* msg = grpc_error_string(error);
   gpr_log(GPR_INFO, "%s: %s", prefix, msg);
-  grpc_error_free_string(msg);
-  grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint);
-  if (conn->server_endpoint != NULL)
-    grpc_endpoint_shutdown(exec_ctx, conn->server_endpoint);
+
+  grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint,
+                         GRPC_ERROR_REF(error));
+  if (conn->server_endpoint != NULL) {
+    grpc_endpoint_shutdown(exec_ctx, conn->server_endpoint,
+                           GRPC_ERROR_REF(error));
+  }
   proxy_connection_unref(exec_ctx, conn);
 }
 
@@ -376,15 +382,20 @@ static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
   gpr_ref_init(&conn->refcount, 1);
   conn->pollset_set = grpc_pollset_set_create();
   grpc_pollset_set_add_pollset(exec_ctx, conn->pollset_set, proxy->pollset);
-  grpc_closure_init(&conn->on_read_request_done, on_read_request_done, conn);
-  grpc_closure_init(&conn->on_server_connect_done, on_server_connect_done,
-                    conn);
-  grpc_closure_init(&conn->on_write_response_done, on_write_response_done,
-                    conn);
-  grpc_closure_init(&conn->on_client_read_done, on_client_read_done, conn);
-  grpc_closure_init(&conn->on_client_write_done, on_client_write_done, conn);
-  grpc_closure_init(&conn->on_server_read_done, on_server_read_done, conn);
-  grpc_closure_init(&conn->on_server_write_done, on_server_write_done, conn);
+  grpc_closure_init(&conn->on_read_request_done, on_read_request_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_server_connect_done, on_server_connect_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_write_response_done, on_write_response_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_client_read_done, on_client_read_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_client_write_done, on_client_write_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_server_read_done, on_server_read_done, conn,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&conn->on_server_write_done, on_server_write_done, conn,
+                    grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&conn->client_read_buffer);
   grpc_slice_buffer_init(&conn->client_deferred_write_buffer);
   grpc_slice_buffer_init(&conn->client_write_buffer);
@@ -469,9 +480,10 @@ void grpc_end2end_http_proxy_destroy(grpc_end2end_http_proxy* proxy) {
   grpc_tcp_server_shutdown_listeners(&exec_ctx, proxy->server);
   grpc_tcp_server_unref(&exec_ctx, proxy->server);
   gpr_free(proxy->proxy_name);
-  grpc_channel_args_destroy(proxy->channel_args);
+  grpc_channel_args_destroy(&exec_ctx, proxy->channel_args);
   grpc_closure destroyed;
-  grpc_closure_init(&destroyed, destroy_pollset, proxy->pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, proxy->pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, proxy->pollset, &destroyed);
   gpr_free(proxy);
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/test/core/end2end/fixtures/proxy.c b/test/core/end2end/fixtures/proxy.c
index beed80df81..cee053e8c5 100644
--- a/test/core/end2end/fixtures/proxy.c
+++ b/test/core/end2end/fixtures/proxy.c
@@ -80,8 +80,7 @@ typedef struct {
 
   grpc_metadata_array p2s_trailing_metadata;
   grpc_status_code p2s_status;
-  char *p2s_status_details;
-  size_t p2s_status_details_capacity;
+  grpc_slice p2s_status_details;
 
   int c2p_server_cancelled;
 } proxy_call;
@@ -112,6 +111,7 @@ grpc_end2end_proxy *grpc_end2end_proxy_create(const grpc_end2end_proxy_def *def,
   grpc_server_register_completion_queue(proxy->server, proxy->cq, NULL);
   grpc_server_start(proxy->server);
 
+  grpc_call_details_init(&proxy->new_call_details);
   gpr_thd_options_set_joinable(&opt);
   GPR_ASSERT(gpr_thd_new(&proxy->thd, thread_main, proxy, &opt));
 
@@ -153,7 +153,7 @@ static void unrefpc(proxy_call *pc, const char *reason) {
     grpc_metadata_array_destroy(&pc->c2p_initial_metadata);
     grpc_metadata_array_destroy(&pc->p2s_initial_metadata);
     grpc_metadata_array_destroy(&pc->p2s_trailing_metadata);
-    gpr_free(pc->p2s_status_details);
+    grpc_slice_unref(pc->p2s_status_details);
     gpr_free(pc);
   }
 }
@@ -203,7 +203,7 @@ static void on_p2s_sent_message(void *arg, int success) {
     op.op = GRPC_OP_RECV_MESSAGE;
     op.flags = 0;
     op.reserved = NULL;
-    op.data.recv_message = &pc->c2p_msg;
+    op.data.recv_message.recv_message = &pc->c2p_msg;
     refpc(pc, "on_c2p_recv_msg");
     err = grpc_call_start_batch(pc->c2p, &op, 1,
                                 new_closure(on_c2p_recv_msg, pc), NULL);
@@ -228,7 +228,7 @@ static void on_c2p_recv_msg(void *arg, int success) {
       op.op = GRPC_OP_SEND_MESSAGE;
       op.flags = 0;
       op.reserved = NULL;
-      op.data.send_message = pc->c2p_msg;
+      op.data.send_message.send_message = pc->c2p_msg;
       refpc(pc, "on_p2s_sent_message");
       err = grpc_call_start_batch(pc->p2s, &op, 1,
                                   new_closure(on_p2s_sent_message, pc), NULL);
@@ -259,7 +259,7 @@ static void on_c2p_sent_message(void *arg, int success) {
     op.op = GRPC_OP_RECV_MESSAGE;
     op.flags = 0;
     op.reserved = NULL;
-    op.data.recv_message = &pc->p2s_msg;
+    op.data.recv_message.recv_message = &pc->p2s_msg;
     refpc(pc, "on_p2s_recv_msg");
     err = grpc_call_start_batch(pc->p2s, &op, 1,
                                 new_closure(on_p2s_recv_msg, pc), NULL);
@@ -278,7 +278,7 @@ static void on_p2s_recv_msg(void *arg, int success) {
     op.op = GRPC_OP_SEND_MESSAGE;
     op.flags = 0;
     op.reserved = NULL;
-    op.data.send_message = pc->p2s_msg;
+    op.data.send_message.send_message = pc->p2s_msg;
     refpc(pc, "on_c2p_sent_message");
     err = grpc_call_start_batch(pc->c2p, &op, 1,
                                 new_closure(on_c2p_sent_message, pc), NULL);
@@ -309,7 +309,7 @@ static void on_p2s_status(void *arg, int success) {
     op.data.send_status_from_server.trailing_metadata =
         pc->p2s_trailing_metadata.metadata;
     op.data.send_status_from_server.status = pc->p2s_status;
-    op.data.send_status_from_server.status_details = pc->p2s_status_details;
+    op.data.send_status_from_server.status_details = &pc->p2s_status_details;
     refpc(pc, "on_c2p_sent_status");
     err = grpc_call_start_batch(pc->c2p, &op, 1,
                                 new_closure(on_c2p_sent_status, pc), NULL);
@@ -339,7 +339,7 @@ static void on_new_call(void *arg, int success) {
     pc->c2p = proxy->new_call;
     pc->p2s = grpc_channel_create_call(
         proxy->client, pc->c2p, GRPC_PROPAGATE_DEFAULTS, proxy->cq,
-        proxy->new_call_details.method, proxy->new_call_details.host,
+        proxy->new_call_details.method, &proxy->new_call_details.host,
         proxy->new_call_details.deadline, NULL);
     gpr_ref_init(&pc->refs, 1);
 
@@ -347,7 +347,8 @@ static void on_new_call(void *arg, int success) {
 
     op.op = GRPC_OP_RECV_INITIAL_METADATA;
     op.flags = 0;
-    op.data.recv_initial_metadata = &pc->p2s_initial_metadata;
+    op.data.recv_initial_metadata.recv_initial_metadata =
+        &pc->p2s_initial_metadata;
     refpc(pc, "on_p2s_recv_initial_metadata");
     err = grpc_call_start_batch(
         pc->p2s, &op, 1, new_closure(on_p2s_recv_initial_metadata, pc), NULL);
@@ -364,7 +365,7 @@ static void on_new_call(void *arg, int success) {
 
     op.op = GRPC_OP_RECV_MESSAGE;
     op.flags = 0;
-    op.data.recv_message = &pc->c2p_msg;
+    op.data.recv_message.recv_message = &pc->c2p_msg;
     refpc(pc, "on_c2p_recv_msg");
     err = grpc_call_start_batch(pc->c2p, &op, 1,
                                 new_closure(on_c2p_recv_msg, pc), NULL);
@@ -372,7 +373,7 @@ static void on_new_call(void *arg, int success) {
 
     op.op = GRPC_OP_RECV_MESSAGE;
     op.flags = 0;
-    op.data.recv_message = &pc->p2s_msg;
+    op.data.recv_message.recv_message = &pc->p2s_msg;
     refpc(pc, "on_p2s_recv_msg");
     err = grpc_call_start_batch(pc->p2s, &op, 1,
                                 new_closure(on_p2s_recv_msg, pc), NULL);
@@ -384,8 +385,6 @@ static void on_new_call(void *arg, int success) {
         &pc->p2s_trailing_metadata;
     op.data.recv_status_on_client.status = &pc->p2s_status;
     op.data.recv_status_on_client.status_details = &pc->p2s_status_details;
-    op.data.recv_status_on_client.status_details_capacity =
-        &pc->p2s_status_details_capacity;
     refpc(pc, "on_p2s_status");
     err = grpc_call_start_batch(pc->p2s, &op, 1, new_closure(on_p2s_status, pc),
                                 NULL);
@@ -401,6 +400,9 @@ static void on_new_call(void *arg, int success) {
 
     request_call(proxy);
 
+    grpc_call_details_destroy(&proxy->new_call_details);
+    grpc_call_details_init(&proxy->new_call_details);
+
     unrefpc(pc, "init");
   } else {
     GPR_ASSERT(proxy->new_call == NULL);
diff --git a/test/core/end2end/fuzzers/BUILD b/test/core/end2end/fuzzers/BUILD
new file mode 100644
index 0000000000..4d98aa0725
--- /dev/null
+++ b/test/core/end2end/fuzzers/BUILD
@@ -0,0 +1,56 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
+
+grpc_fuzzer(
+  name = "api_fuzzer",
+  srcs = ["api_fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util", "//test/core/end2end:ssl_test_data"],
+  corpus = "api_fuzzer_corpus",
+  copts = ["-std=c99"],
+)
+
+grpc_fuzzer(
+  name = "client_fuzzer",
+  srcs = ["client_fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "client_fuzzer_corpus",
+  copts = ["-std=c99"],
+)
+
+grpc_fuzzer(
+  name = "server_fuzzer",
+  srcs = ["server_fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "server_fuzzer_corpus",
+  copts = ["-std=c99"],
+)
diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.c
index 746134c85b..0de8b9459a 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.c
@@ -44,6 +44,7 @@
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/surface/server.h"
 #include "src/core/lib/transport/metadata.h"
 #include "test/core/end2end/data/ssl_test_data.h"
@@ -90,7 +91,7 @@ static uint8_t next_byte(input_stream *inp) {
 
 static void end(input_stream *inp) { inp->cur = inp->end; }
 
-static char *read_string(input_stream *inp) {
+static char *read_string(input_stream *inp, bool *special) {
   char *str = NULL;
   size_t cap = 0;
   size_t sz = 0;
@@ -102,18 +103,56 @@ static char *read_string(input_stream *inp) {
     }
     c = (char)next_byte(inp);
     str[sz++] = c;
-  } while (c != 0);
+  } while (c != 0 && c != 1);
+  if (special != NULL) {
+    *special = (c == 1);
+  }
+  if (c == 1) {
+    str[sz - 1] = 0;
+  }
   return str;
 }
 
-static void read_buffer(input_stream *inp, char **buffer, size_t *length) {
+static void read_buffer(input_stream *inp, char **buffer, size_t *length,
+                        bool *special) {
   *length = next_byte(inp);
+  if (*length == 255) {
+    if (special != NULL) *special = true;
+    *length = next_byte(inp);
+  } else {
+    if (special != NULL) *special = false;
+  }
   *buffer = gpr_malloc(*length);
   for (size_t i = 0; i < *length; i++) {
     (*buffer)[i] = (char)next_byte(inp);
   }
 }
 
+static grpc_slice maybe_intern(grpc_slice s, bool intern) {
+  grpc_slice r = intern ? grpc_slice_intern(s) : grpc_slice_ref(s);
+  grpc_slice_unref(s);
+  return r;
+}
+
+static grpc_slice read_string_like_slice(input_stream *inp) {
+  bool special;
+  char *s = read_string(inp, &special);
+  grpc_slice r = maybe_intern(grpc_slice_from_copied_string(s), special);
+  gpr_free(s);
+  return r;
+}
+
+static grpc_slice read_buffer_like_slice(input_stream *inp) {
+  char *buffer;
+  size_t length;
+  bool special;
+  read_buffer(inp, &buffer, &length, &special);
+  grpc_slice r =
+      maybe_intern(grpc_slice_from_copied_buffer(buffer, length), special);
+  gpr_free(buffer);
+  return r;
+}
+
 static uint32_t read_uint22(input_stream *inp) {
   uint8_t b = next_byte(inp);
   uint32_t x = b & 0x7f;
@@ -170,12 +209,12 @@ static grpc_channel_args *read_args(input_stream *inp) {
     switch (next_byte(inp)) {
       case 1:
         args[i].type = GRPC_ARG_STRING;
-        args[i].key = read_string(inp);
-        args[i].value.string = read_string(inp);
+        args[i].key = read_string(inp, NULL);
+        args[i].value.string = read_string(inp, NULL);
         break;
       case 2:
         args[i].type = GRPC_ARG_INTEGER;
-        args[i].key = read_string(inp);
+        args[i].key = read_string(inp, NULL);
         args[i].value.integer = read_int(inp);
         break;
       case 3:
@@ -217,7 +256,7 @@ static const char *read_cred_artifact(cred_artifact_ctx *ctx, input_stream *inp,
                                       size_t num_builtins) {
   uint8_t b = next_byte(inp);
   if (b == 0) return NULL;
-  if (b == 1) return ctx->release[ctx->num_release++] = read_string(inp);
+  if (b == 1) return ctx->release[ctx->num_release++] = read_string(inp, NULL);
   if (b >= num_builtins + 1) {
     end(inp);
     return NULL;
@@ -349,11 +388,11 @@ static void finish_resolve(grpc_exec_ctx *exec_ctx, void *arg,
     addrs->addrs = gpr_malloc(sizeof(*addrs->addrs));
     addrs->addrs[0].len = 0;
     *r->addrs = addrs;
-    grpc_exec_ctx_sched(exec_ctx, r->on_done, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, r->on_done, GRPC_ERROR_NONE);
   } else {
-    grpc_exec_ctx_sched(
+    grpc_closure_sched(
         exec_ctx, r->on_done,
-        GRPC_ERROR_CREATE_REFERENCING("Resolution failed", &error, 1), NULL);
+        GRPC_ERROR_CREATE_REFERENCING("Resolution failed", &error, 1));
   }
 
   gpr_free(r->addr);
@@ -369,10 +408,11 @@ void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;
   r->addrs = addresses;
-  grpc_timer_init(exec_ctx, &r->timer,
-                  gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
-                               gpr_time_from_seconds(1, GPR_TIMESPAN)),
-                  finish_resolve, r, gpr_now(GPR_CLOCK_MONOTONIC));
+  grpc_timer_init(
+      exec_ctx, &r->timer, gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                                        gpr_time_from_seconds(1, GPR_TIMESPAN)),
+      grpc_closure_create(finish_resolve, r, grpc_schedule_on_exec_ctx),
+      gpr_now(GPR_CLOCK_MONOTONIC));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -398,11 +438,11 @@ static void do_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   future_connect *fc = arg;
   if (error != GRPC_ERROR_NONE) {
     *fc->ep = NULL;
-    grpc_exec_ctx_sched(exec_ctx, fc->closure, GRPC_ERROR_REF(error), NULL);
+    grpc_closure_sched(exec_ctx, fc->closure, GRPC_ERROR_REF(error));
   } else if (g_server != NULL) {
     grpc_endpoint *client;
     grpc_endpoint *server;
-    grpc_passthru_endpoint_create(&client, &server, g_resource_quota);
+    grpc_passthru_endpoint_create(&client, &server, g_resource_quota, NULL);
     *fc->ep = client;
 
     grpc_transport *transport =
@@ -410,7 +450,7 @@ static void do_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
     grpc_server_setup_transport(exec_ctx, g_server, transport, NULL, NULL);
     grpc_chttp2_transport_start_reading(exec_ctx, transport, NULL);
 
-    grpc_exec_ctx_sched(exec_ctx, fc->closure, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, fc->closure, GRPC_ERROR_NONE);
   } else {
     sched_connect(exec_ctx, fc->closure, fc->ep, fc->deadline);
   }
@@ -421,8 +461,8 @@ static void sched_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
                           grpc_endpoint **ep, gpr_timespec deadline) {
   if (gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) < 0) {
     *ep = NULL;
-    grpc_exec_ctx_sched(exec_ctx, closure,
-                        GRPC_ERROR_CREATE("Connect deadline exceeded"), NULL);
+    grpc_closure_sched(exec_ctx, closure,
+                       GRPC_ERROR_CREATE("Connect deadline exceeded"));
     return;
   }
 
@@ -430,10 +470,11 @@ static void sched_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
   fc->closure = closure;
   fc->ep = ep;
   fc->deadline = deadline;
-  grpc_timer_init(exec_ctx, &fc->timer,
-                  gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
-                               gpr_time_from_millis(1, GPR_TIMESPAN)),
-                  do_connect, fc, gpr_now(GPR_CLOCK_MONOTONIC));
+  grpc_timer_init(
+      exec_ctx, &fc->timer, gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                                         gpr_time_from_millis(1, GPR_TIMESPAN)),
+      grpc_closure_create(do_connect, fc, grpc_schedule_on_exec_ctx),
+      gpr_now(GPR_CLOCK_MONOTONIC));
 }
 
 static void my_tcp_client_connect(grpc_exec_ctx *exec_ctx,
@@ -506,8 +547,7 @@ typedef struct call_state {
   grpc_status_code status;
   grpc_metadata_array recv_initial_metadata;
   grpc_metadata_array recv_trailing_metadata;
-  char *recv_status_details;
-  size_t recv_status_details_capacity;
+  grpc_slice recv_status_details;
   int cancelled;
   int pending_ops;
   grpc_call_details call_details;
@@ -521,6 +561,11 @@ typedef struct call_state {
   size_t cap_to_free;
   void **to_free;
 
+  // array of slices to unref
+  size_t num_slices_to_unref;
+  size_t cap_slices_to_unref;
+  grpc_slice **slices_to_unref;
+
   struct call_state *next;
   struct call_state *prev;
 } call_state;
@@ -556,13 +601,18 @@ static call_state *maybe_delete_call_state(call_state *call) {
   call->next->prev = call->prev;
   grpc_metadata_array_destroy(&call->recv_initial_metadata);
   grpc_metadata_array_destroy(&call->recv_trailing_metadata);
-  gpr_free(call->recv_status_details);
+  grpc_slice_unref(call->recv_status_details);
   grpc_call_details_destroy(&call->call_details);
 
+  for (size_t i = 0; i < call->num_slices_to_unref; i++) {
+    grpc_slice_unref(*call->slices_to_unref[i]);
+    gpr_free(call->slices_to_unref[i]);
+  }
   for (size_t i = 0; i < call->num_to_free; i++) {
     gpr_free(call->to_free[i]);
   }
   gpr_free(call->to_free);
+  gpr_free(call->slices_to_unref);
 
   gpr_free(call);
 
@@ -578,6 +628,19 @@ static void add_to_free(call_state *call, void *p) {
   call->to_free[call->num_to_free++] = p;
 }
 
+static grpc_slice *add_slice_to_unref(call_state *call, grpc_slice s) {
+  if (call->num_slices_to_unref == call->cap_slices_to_unref) {
+    call->cap_slices_to_unref = GPR_MAX(8, 2 * call->cap_slices_to_unref);
+    call->slices_to_unref =
+        gpr_realloc(call->slices_to_unref,
+                    sizeof(*call->slices_to_unref) * call->cap_slices_to_unref);
+  }
+  call->slices_to_unref[call->num_slices_to_unref] =
+      gpr_malloc(sizeof(grpc_slice));
+  *call->slices_to_unref[call->num_slices_to_unref++] = s;
+  return call->slices_to_unref[call->num_slices_to_unref - 1];
+}
+
 static void read_metadata(input_stream *inp, size_t *count,
                           grpc_metadata **metadata, call_state *cs) {
   *count = next_byte(inp);
@@ -585,12 +648,11 @@ static void read_metadata(input_stream *inp, size_t *count,
     *metadata = gpr_malloc(*count * sizeof(**metadata));
     memset(*metadata, 0, *count * sizeof(**metadata));
     for (size_t i = 0; i < *count; i++) {
-      (*metadata)[i].key = read_string(inp);
-      read_buffer(inp, (char **)&(*metadata)[i].value,
-                  &(*metadata)[i].value_length);
+      (*metadata)[i].key = read_string_like_slice(inp);
+      (*metadata)[i].value = read_buffer_like_slice(inp);
       (*metadata)[i].flags = read_uint32(inp);
-      add_to_free(cs, (void *)(*metadata)[i].key);
-      add_to_free(cs, (void *)(*metadata)[i].value);
+      add_slice_to_unref(cs, (*metadata)[i].key);
+      add_slice_to_unref(cs, (*metadata)[i].value);
     }
   } else {
     *metadata = gpr_malloc(1);
@@ -654,7 +716,7 @@ static validator *make_finished_batch_validator(call_state *cs,
 }
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  grpc_test_only_set_metadata_hash_seed(0);
+  grpc_test_only_set_slice_hash_seed(0);
   if (squelch) gpr_set_log_function(dont_log);
   input_stream inp = {data, data + size};
   grpc_resolve_address = my_resolve_address;
@@ -740,13 +802,17 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       // create an insecure channel
       case 2: {
         if (g_channel == NULL) {
-          char *target = read_string(&inp);
+          char *target = read_string(&inp, NULL);
           char *target_uri;
           gpr_asprintf(&target_uri, "dns:%s", target);
           grpc_channel_args *args = read_args(&inp);
           g_channel = grpc_insecure_channel_create(target_uri, args, NULL);
           GPR_ASSERT(g_channel != NULL);
-          grpc_channel_args_destroy(args);
+          {
+            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+            grpc_channel_args_destroy(&exec_ctx, args);
+            grpc_exec_ctx_finish(&exec_ctx);
+          }
           gpr_free(target_uri);
           gpr_free(target);
         } else {
@@ -770,7 +836,11 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
           grpc_channel_args *args = read_args(&inp);
           g_server = grpc_server_create(args, NULL);
           GPR_ASSERT(g_server != NULL);
-          grpc_channel_args_destroy(args);
+          {
+            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+            grpc_channel_args_destroy(&exec_ctx, args);
+            grpc_exec_ctx_finish(&exec_ctx);
+          }
           grpc_server_register_completion_queue(g_server, cq, NULL);
           grpc_server_start(g_server);
           server_shutdown = false;
@@ -861,8 +931,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
           parent_call = g_active_call->call;
         }
         uint32_t propagation_mask = read_uint32(&inp);
-        char *method = read_string(&inp);
-        char *host = read_string(&inp);
+        grpc_slice method = read_string_like_slice(&inp);
+        grpc_slice host = read_string_like_slice(&inp);
         gpr_timespec deadline =
             gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                          gpr_time_from_micros(read_uint32(&inp), GPR_TIMESPAN));
@@ -871,12 +941,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
           call_state *cs = new_call(g_active_call, CLIENT);
           cs->call =
               grpc_channel_create_call(g_channel, parent_call, propagation_mask,
-                                       cq, method, host, deadline, NULL);
+                                       cq, method, &host, deadline, NULL);
         } else {
           end(&inp);
         }
-        gpr_free(method);
-        gpr_free(host);
+        grpc_slice_unref(method);
+        grpc_slice_unref(host);
         break;
       }
       // switch the 'current' call
@@ -923,8 +993,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                 ok = false;
               } else {
                 has_ops |= 1 << GRPC_OP_SEND_MESSAGE;
-                g_active_call->send_message = op->data.send_message =
-                    read_message(&inp);
+                g_active_call->send_message =
+                    op->data.send_message.send_message = read_message(&inp);
               }
               break;
             case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
@@ -941,18 +1011,19 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                   g_active_call);
               op->data.send_status_from_server.status = next_byte(&inp);
               op->data.send_status_from_server.status_details =
-                  read_string(&inp);
+                  add_slice_to_unref(g_active_call,
+                                     read_buffer_like_slice(&inp));
               break;
             case GRPC_OP_RECV_INITIAL_METADATA:
               op->op = GRPC_OP_RECV_INITIAL_METADATA;
               has_ops |= 1 << GRPC_OP_RECV_INITIAL_METADATA;
-              op->data.recv_initial_metadata =
+              op->data.recv_initial_metadata.recv_initial_metadata =
                   &g_active_call->recv_initial_metadata;
               break;
             case GRPC_OP_RECV_MESSAGE:
               op->op = GRPC_OP_RECV_MESSAGE;
               has_ops |= 1 << GRPC_OP_RECV_MESSAGE;
-              op->data.recv_message = &g_active_call->recv_message;
+              op->data.recv_message.recv_message = &g_active_call->recv_message;
               break;
             case GRPC_OP_RECV_STATUS_ON_CLIENT:
               op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
@@ -961,8 +1032,6 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                   &g_active_call->recv_trailing_metadata;
               op->data.recv_status_on_client.status_details =
                   &g_active_call->recv_status_details;
-              op->data.recv_status_on_client.status_details_capacity =
-                  &g_active_call->recv_status_details_capacity;
               break;
             case GRPC_OP_RECV_CLOSE_ON_SERVER:
               op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
@@ -990,22 +1059,6 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
           grpc_byte_buffer_destroy(g_active_call->send_message);
           g_active_call->send_message = NULL;
         }
-        for (i = 0; i < num_ops; i++) {
-          op = &ops[i];
-          switch (op->op) {
-            case GRPC_OP_SEND_STATUS_FROM_SERVER:
-              gpr_free((void *)op->data.send_status_from_server.status_details);
-              break;
-            case GRPC_OP_SEND_MESSAGE:
-            case GRPC_OP_SEND_INITIAL_METADATA:
-            case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
-            case GRPC_OP_RECV_INITIAL_METADATA:
-            case GRPC_OP_RECV_MESSAGE:
-            case GRPC_OP_RECV_STATUS_ON_CLIENT:
-            case GRPC_OP_RECV_CLOSE_ON_SERVER:
-              break;
-          }
-        }
         gpr_free(ops);
 
         break;
@@ -1050,14 +1103,14 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       }
       // enable a tracer
       case 17: {
-        char *tracer = read_string(&inp);
+        char *tracer = read_string(&inp, NULL);
         grpc_tracer_set_enabled(tracer, 1);
         gpr_free(tracer);
         break;
       }
       // disable a tracer
       case 18: {
-        char *tracer = read_string(&inp);
+        char *tracer = read_string(&inp, NULL);
         grpc_tracer_set_enabled(tracer, 0);
         gpr_free(tracer);
         break;
@@ -1099,14 +1152,18 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       // create a secure channel
       case 22: {
         if (g_channel == NULL) {
-          char *target = read_string(&inp);
+          char *target = read_string(&inp, NULL);
           char *target_uri;
           gpr_asprintf(&target_uri, "dns:%s", target);
           grpc_channel_args *args = read_args(&inp);
           grpc_channel_credentials *creds = read_channel_creds(&inp);
           g_channel = grpc_secure_channel_create(creds, target_uri, args, NULL);
           GPR_ASSERT(g_channel != NULL);
-          grpc_channel_args_destroy(args);
+          {
+            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+            grpc_channel_args_destroy(&exec_ctx, args);
+            grpc_exec_ctx_finish(&exec_ctx);
+          }
           gpr_free(target_uri);
           gpr_free(target);
           grpc_channel_credentials_release(creds);
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/008d276f01f9371a5956cccf2eeeadb790728a84 b/test/core/end2end/fuzzers/api_fuzzer_corpus/008d276f01f9371a5956cccf2eeeadb790728a84
new file mode 100644
index 0000000000..88f358cf9a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/008d276f01f9371a5956cccf2eeeadb790728a84
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/00ba96baafa4595f2d41c2fcf0a27f4e9be5c44d b/test/core/end2end/fuzzers/api_fuzzer_corpus/00ba96baafa4595f2d41c2fcf0a27f4e9be5c44d
new file mode 100644
index 0000000000..6945952ac5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/00ba96baafa4595f2d41c2fcf0a27f4e9be5c44d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0163bae995fe67a902eabf9f2644726d4767184c b/test/core/end2end/fuzzers/api_fuzzer_corpus/0163bae995fe67a902eabf9f2644726d4767184c
new file mode 100644
index 0000000000..b0583e0b7d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0163bae995fe67a902eabf9f2644726d4767184c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0242a9f4d4fafc96ee9ed762b610e3c68d6efdec b/test/core/end2end/fuzzers/api_fuzzer_corpus/0242a9f4d4fafc96ee9ed762b610e3c68d6efdec
new file mode 100644
index 0000000000..392ad08c09
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0242a9f4d4fafc96ee9ed762b610e3c68d6efdec
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/039c25bc070936901fc95f63ce9cc3058158fb6d b/test/core/end2end/fuzzers/api_fuzzer_corpus/039c25bc070936901fc95f63ce9cc3058158fb6d
new file mode 100644
index 0000000000..fd96a32975
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/039c25bc070936901fc95f63ce9cc3058158fb6d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/03eb66a763e065772bbb09e9a55baf081814ff25 b/test/core/end2end/fuzzers/api_fuzzer_corpus/03eb66a763e065772bbb09e9a55baf081814ff25
new file mode 100644
index 0000000000..c54a6b4028
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/03eb66a763e065772bbb09e9a55baf081814ff25
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/053b47093c2145d00b8d53ea58b80afcc876109b b/test/core/end2end/fuzzers/api_fuzzer_corpus/053b47093c2145d00b8d53ea58b80afcc876109b
new file mode 100644
index 0000000000..e08913c002
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/053b47093c2145d00b8d53ea58b80afcc876109b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/06a298ad14533924c9fcb2df0d462c44a206f64b b/test/core/end2end/fuzzers/api_fuzzer_corpus/06a298ad14533924c9fcb2df0d462c44a206f64b
new file mode 100644
index 0000000000..cf961eb403
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/06a298ad14533924c9fcb2df0d462c44a206f64b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/06d20c59bcbeb0deff39619455a713691191bccd b/test/core/end2end/fuzzers/api_fuzzer_corpus/06d20c59bcbeb0deff39619455a713691191bccd
new file mode 100644
index 0000000000..87426c9da6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/06d20c59bcbeb0deff39619455a713691191bccd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/070aca38b5cd06626dfc98126ef1225595800427 b/test/core/end2end/fuzzers/api_fuzzer_corpus/070aca38b5cd06626dfc98126ef1225595800427
new file mode 100644
index 0000000000..0be853bf97
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/070aca38b5cd06626dfc98126ef1225595800427
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/07867ad24a27ff8675dc36a1d8da833f9ee9434b b/test/core/end2end/fuzzers/api_fuzzer_corpus/07867ad24a27ff8675dc36a1d8da833f9ee9434b
new file mode 100644
index 0000000000..06986fe7ae
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/07867ad24a27ff8675dc36a1d8da833f9ee9434b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/08398518b9b4e98d4625dfb063ab0b6d9399a239 b/test/core/end2end/fuzzers/api_fuzzer_corpus/08398518b9b4e98d4625dfb063ab0b6d9399a239
new file mode 100644
index 0000000000..fc5719382d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/08398518b9b4e98d4625dfb063ab0b6d9399a239
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/08455b3ef9d516deb8155d8db7d51c43ce0ff07a b/test/core/end2end/fuzzers/api_fuzzer_corpus/08455b3ef9d516deb8155d8db7d51c43ce0ff07a
new file mode 100644
index 0000000000..4b698ba9ee
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/08455b3ef9d516deb8155d8db7d51c43ce0ff07a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0914e4f6ee18c9d15b8df1858a7745b86d875970 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0914e4f6ee18c9d15b8df1858a7745b86d875970
new file mode 100644
index 0000000000..489deadb23
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0914e4f6ee18c9d15b8df1858a7745b86d875970
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/091f02cc858a89253748b7d1051b8728d0e34015 b/test/core/end2end/fuzzers/api_fuzzer_corpus/091f02cc858a89253748b7d1051b8728d0e34015
new file mode 100644
index 0000000000..4435741946
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/091f02cc858a89253748b7d1051b8728d0e34015
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/095e3fa32a271ef9326d4dcd59fbd003977fdcfa b/test/core/end2end/fuzzers/api_fuzzer_corpus/095e3fa32a271ef9326d4dcd59fbd003977fdcfa
new file mode 100644
index 0000000000..d9b1ae3fce
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/095e3fa32a271ef9326d4dcd59fbd003977fdcfa
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/096f9413b1bf712e092cf8bd70754014d6242f12 b/test/core/end2end/fuzzers/api_fuzzer_corpus/096f9413b1bf712e092cf8bd70754014d6242f12
new file mode 100644
index 0000000000..c04f03c9ea
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/096f9413b1bf712e092cf8bd70754014d6242f12
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/097f758de0f31691fac6637bf8ac5ac946d5b079 b/test/core/end2end/fuzzers/api_fuzzer_corpus/097f758de0f31691fac6637bf8ac5ac946d5b079
new file mode 100644
index 0000000000..17554b479a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/097f758de0f31691fac6637bf8ac5ac946d5b079
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/099cc7faaaa2620df22c9bcd6e6d49730e4788b3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/099cc7faaaa2620df22c9bcd6e6d49730e4788b3
new file mode 100644
index 0000000000..f16a04a177
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/099cc7faaaa2620df22c9bcd6e6d49730e4788b3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0a3f1f614446ded112775bbbc5c61513ad78e12e b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a3f1f614446ded112775bbbc5c61513ad78e12e
new file mode 100644
index 0000000000..c8d28f8d07
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a3f1f614446ded112775bbbc5c61513ad78e12e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0a4b84c2a50ba66f06c99e945912972cdcfc96be b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a4b84c2a50ba66f06c99e945912972cdcfc96be
new file mode 100644
index 0000000000..d0f43e9d91
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a4b84c2a50ba66f06c99e945912972cdcfc96be
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0a85889229b729883f4c0420d1a13d9f0a2ca7c2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a85889229b729883f4c0420d1a13d9f0a2ca7c2
new file mode 100644
index 0000000000..dd537e387d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0a85889229b729883f4c0420d1a13d9f0a2ca7c2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0ab436006cb2ecd8ecb2400fed982886e4589360 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0ab436006cb2ecd8ecb2400fed982886e4589360
new file mode 100644
index 0000000000..f6e83c8a5b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0ab436006cb2ecd8ecb2400fed982886e4589360
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0c26c7da58087406c491efb8f8f721eb934e6a5a b/test/core/end2end/fuzzers/api_fuzzer_corpus/0c26c7da58087406c491efb8f8f721eb934e6a5a
new file mode 100644
index 0000000000..e6a2e760bb
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0c26c7da58087406c491efb8f8f721eb934e6a5a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0cd9696699bd190463ecef91968624601b64cd8b b/test/core/end2end/fuzzers/api_fuzzer_corpus/0cd9696699bd190463ecef91968624601b64cd8b
new file mode 100644
index 0000000000..92125efaa5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0cd9696699bd190463ecef91968624601b64cd8b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0d19e60f4eb1b729e272dd5dec68e8b67f03a5f4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0d19e60f4eb1b729e272dd5dec68e8b67f03a5f4
new file mode 100644
index 0000000000..2889e7040e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0d19e60f4eb1b729e272dd5dec68e8b67f03a5f4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0d25b57b2ac671377f8042015896619c09a2f9b5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0d25b57b2ac671377f8042015896619c09a2f9b5
new file mode 100644
index 0000000000..5312ff2ddd
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0d25b57b2ac671377f8042015896619c09a2f9b5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0dfc84a6703bdbe9a6acb72e178353d5d69f5814 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0dfc84a6703bdbe9a6acb72e178353d5d69f5814
new file mode 100644
index 0000000000..119f151676
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0dfc84a6703bdbe9a6acb72e178353d5d69f5814
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0e7a05178db60007ff4a8dea0e22b60825976c51 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0e7a05178db60007ff4a8dea0e22b60825976c51
new file mode 100644
index 0000000000..ac4d9dc1ed
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0e7a05178db60007ff4a8dea0e22b60825976c51
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0ec11a92c1830b4c2f56a0979dd9e3c7162bd624 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0ec11a92c1830b4c2f56a0979dd9e3c7162bd624
new file mode 100644
index 0000000000..cdd1a44c89
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0ec11a92c1830b4c2f56a0979dd9e3c7162bd624
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0f01df12331467c4eed400465254eda05eaeb110 b/test/core/end2end/fuzzers/api_fuzzer_corpus/0f01df12331467c4eed400465254eda05eaeb110
new file mode 100644
index 0000000000..09bf4db585
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0f01df12331467c4eed400465254eda05eaeb110
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/0feaff8d6ad28109f35d6c6080504456b242c8ce b/test/core/end2end/fuzzers/api_fuzzer_corpus/0feaff8d6ad28109f35d6c6080504456b242c8ce
new file mode 100644
index 0000000000..40ae0b5137
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/0feaff8d6ad28109f35d6c6080504456b242c8ce
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/10b47823e11c988222f5f778146f9cf922b286bf b/test/core/end2end/fuzzers/api_fuzzer_corpus/10b47823e11c988222f5f778146f9cf922b286bf
new file mode 100644
index 0000000000..d0412a2385
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/10b47823e11c988222f5f778146f9cf922b286bf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/122b6fc72956541812dd653b726b073b77ca33be b/test/core/end2end/fuzzers/api_fuzzer_corpus/122b6fc72956541812dd653b726b073b77ca33be
new file mode 100644
index 0000000000..e6eb181351
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/122b6fc72956541812dd653b726b073b77ca33be
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/128a7ef7f9b87c4f299d3cafe2dfdb9b161756bd b/test/core/end2end/fuzzers/api_fuzzer_corpus/128a7ef7f9b87c4f299d3cafe2dfdb9b161756bd
new file mode 100644
index 0000000000..9be7c77a7b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/128a7ef7f9b87c4f299d3cafe2dfdb9b161756bd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/14064ac4844c709b247a4345a92d8be9766785c4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/14064ac4844c709b247a4345a92d8be9766785c4
new file mode 100644
index 0000000000..fa731d4a05
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/14064ac4844c709b247a4345a92d8be9766785c4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/14ee9fbfe5284650e3a3de83ecc3e09abdc48c16 b/test/core/end2end/fuzzers/api_fuzzer_corpus/14ee9fbfe5284650e3a3de83ecc3e09abdc48c16
new file mode 100644
index 0000000000..54d8626e79
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/14ee9fbfe5284650e3a3de83ecc3e09abdc48c16
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/163cf93cebfb32d617830aa4e69e8b5f59bd3a08 b/test/core/end2end/fuzzers/api_fuzzer_corpus/163cf93cebfb32d617830aa4e69e8b5f59bd3a08
new file mode 100644
index 0000000000..0a02d52bc2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/163cf93cebfb32d617830aa4e69e8b5f59bd3a08
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/174ea33060bccea880dfdcfa12c5349e8eb4cb2a b/test/core/end2end/fuzzers/api_fuzzer_corpus/174ea33060bccea880dfdcfa12c5349e8eb4cb2a
new file mode 100644
index 0000000000..da32e95013
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/174ea33060bccea880dfdcfa12c5349e8eb4cb2a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/17582452219fc4a27058a789f416a56631461296 b/test/core/end2end/fuzzers/api_fuzzer_corpus/17582452219fc4a27058a789f416a56631461296
new file mode 100644
index 0000000000..80a59659e1
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/17582452219fc4a27058a789f416a56631461296
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1776f4c32c11490c65b81d0b7ae2ece4a3d1e9a7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1776f4c32c11490c65b81d0b7ae2ece4a3d1e9a7
new file mode 100644
index 0000000000..64ceda1e16
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1776f4c32c11490c65b81d0b7ae2ece4a3d1e9a7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/17a1354d2bfe982e9db1bac550fe01dd105f81c3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/17a1354d2bfe982e9db1bac550fe01dd105f81c3
new file mode 100644
index 0000000000..6918b8a498
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/17a1354d2bfe982e9db1bac550fe01dd105f81c3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/17bc3a2ae619ef05ad35b147f4916c0453ebacf1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/17bc3a2ae619ef05ad35b147f4916c0453ebacf1
new file mode 100644
index 0000000000..c7c2613e75
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/17bc3a2ae619ef05ad35b147f4916c0453ebacf1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/17e562d437fd283e58a5621c33b13191333b279f b/test/core/end2end/fuzzers/api_fuzzer_corpus/17e562d437fd283e58a5621c33b13191333b279f
new file mode 100644
index 0000000000..28b70b3cff
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/17e562d437fd283e58a5621c33b13191333b279f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1847f224b543fd0592e9cf365b8eddb61c140d82 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1847f224b543fd0592e9cf365b8eddb61c140d82
new file mode 100644
index 0000000000..f8c75b573c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1847f224b543fd0592e9cf365b8eddb61c140d82
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1901234bd7c9cb6ee19ff8b17179c481bdc7c5f2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1901234bd7c9cb6ee19ff8b17179c481bdc7c5f2
new file mode 100644
index 0000000000..ef09a0eaf5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1901234bd7c9cb6ee19ff8b17179c481bdc7c5f2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/19fdd6cdeee7a5cbc991d0e3242c23d5aaff2fbf b/test/core/end2end/fuzzers/api_fuzzer_corpus/19fdd6cdeee7a5cbc991d0e3242c23d5aaff2fbf
new file mode 100644
index 0000000000..38d23faffd
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/19fdd6cdeee7a5cbc991d0e3242c23d5aaff2fbf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1b331dfc1d9d535063f0cc6f7a709499a5f8cb59 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1b331dfc1d9d535063f0cc6f7a709499a5f8cb59
new file mode 100644
index 0000000000..b67ad3729d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1b331dfc1d9d535063f0cc6f7a709499a5f8cb59
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1b50ba2e44a359f37205ae476682495cff96838d b/test/core/end2end/fuzzers/api_fuzzer_corpus/1b50ba2e44a359f37205ae476682495cff96838d
new file mode 100644
index 0000000000..bc8e2331a5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1b50ba2e44a359f37205ae476682495cff96838d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1c0dc85faed94bb89bc90f87799d7383cf9907cf b/test/core/end2end/fuzzers/api_fuzzer_corpus/1c0dc85faed94bb89bc90f87799d7383cf9907cf
new file mode 100644
index 0000000000..c83ac858d6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1c0dc85faed94bb89bc90f87799d7383cf9907cf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1c968074e9dcd8e9922e6c01ecfedcaf7b2fe5a3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1c968074e9dcd8e9922e6c01ecfedcaf7b2fe5a3
new file mode 100644
index 0000000000..2591059a44
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1c968074e9dcd8e9922e6c01ecfedcaf7b2fe5a3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1ca16103f5175b0607b579e0c3734b59843e27b0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1ca16103f5175b0607b579e0c3734b59843e27b0
new file mode 100644
index 0000000000..006d8e8437
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1ca16103f5175b0607b579e0c3734b59843e27b0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1cae148c387cd20a1742d902543c2c8396589479 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1cae148c387cd20a1742d902543c2c8396589479
new file mode 100644
index 0000000000..3869d83f4f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1cae148c387cd20a1742d902543c2c8396589479
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1cfd4875b6708b439f1db655abfdd57c1141348a b/test/core/end2end/fuzzers/api_fuzzer_corpus/1cfd4875b6708b439f1db655abfdd57c1141348a
new file mode 100644
index 0000000000..37a9bcf9d3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1cfd4875b6708b439f1db655abfdd57c1141348a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1d10780f4cb83cb9f6762548ae133d2115c4354f b/test/core/end2end/fuzzers/api_fuzzer_corpus/1d10780f4cb83cb9f6762548ae133d2115c4354f
new file mode 100644
index 0000000000..a4c1921b5e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1d10780f4cb83cb9f6762548ae133d2115c4354f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1dba0d6c34b03b19e648e2fc9cb3aa7a13e713a2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1dba0d6c34b03b19e648e2fc9cb3aa7a13e713a2
new file mode 100644
index 0000000000..ffa1c18aa7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1dba0d6c34b03b19e648e2fc9cb3aa7a13e713a2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1de191d81c4c7bf0e026bff0a040165c084fd630 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1de191d81c4c7bf0e026bff0a040165c084fd630
new file mode 100644
index 0000000000..52fdbc5c47
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1de191d81c4c7bf0e026bff0a040165c084fd630
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1e1f1e0230004479b502603a1b60552192559679 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1e1f1e0230004479b502603a1b60552192559679
new file mode 100644
index 0000000000..18b642caa2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1e1f1e0230004479b502603a1b60552192559679
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/1f3f61bbe6ea0c7e9b447f134742b3e7909b9198 b/test/core/end2end/fuzzers/api_fuzzer_corpus/1f3f61bbe6ea0c7e9b447f134742b3e7909b9198
new file mode 100644
index 0000000000..27491bad75
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/1f3f61bbe6ea0c7e9b447f134742b3e7909b9198
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/20ff1f8d5d34cb01d58aa334dc46a6644e6e1d12 b/test/core/end2end/fuzzers/api_fuzzer_corpus/20ff1f8d5d34cb01d58aa334dc46a6644e6e1d12
new file mode 100644
index 0000000000..fc747d4a72
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/20ff1f8d5d34cb01d58aa334dc46a6644e6e1d12
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/224b2255a1bd250102481abc3e823090650e231e b/test/core/end2end/fuzzers/api_fuzzer_corpus/224b2255a1bd250102481abc3e823090650e231e
new file mode 100644
index 0000000000..6dee8f3e8d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/224b2255a1bd250102481abc3e823090650e231e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/22c7bfb3460529c77255e9cb82ef8f7d8381f8f3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/22c7bfb3460529c77255e9cb82ef8f7d8381f8f3
new file mode 100644
index 0000000000..b5f6a8572c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/22c7bfb3460529c77255e9cb82ef8f7d8381f8f3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/23746fe5e477430aec8b12e9d7de0f86f6a6e191 b/test/core/end2end/fuzzers/api_fuzzer_corpus/23746fe5e477430aec8b12e9d7de0f86f6a6e191
new file mode 100644
index 0000000000..735003e24e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/23746fe5e477430aec8b12e9d7de0f86f6a6e191
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2378c3f1206f20711468391ce739116ffe58374b b/test/core/end2end/fuzzers/api_fuzzer_corpus/2378c3f1206f20711468391ce739116ffe58374b
new file mode 100644
index 0000000000..ca3ce31cbe
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2378c3f1206f20711468391ce739116ffe58374b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/247a7d3e0061dd0f32c3f6b2fc43a08e2cc8cf72 b/test/core/end2end/fuzzers/api_fuzzer_corpus/247a7d3e0061dd0f32c3f6b2fc43a08e2cc8cf72
new file mode 100644
index 0000000000..667761ed63
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/247a7d3e0061dd0f32c3f6b2fc43a08e2cc8cf72
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/25c05b84c4b4f1a93f0f72d368c3c3644b564881 b/test/core/end2end/fuzzers/api_fuzzer_corpus/25c05b84c4b4f1a93f0f72d368c3c3644b564881
new file mode 100644
index 0000000000..0cde771ff9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/25c05b84c4b4f1a93f0f72d368c3c3644b564881
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/26794761df5dc7f093d2395b81a32af5e6b54392 b/test/core/end2end/fuzzers/api_fuzzer_corpus/26794761df5dc7f093d2395b81a32af5e6b54392
new file mode 100644
index 0000000000..1eaa5be9ee
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/26794761df5dc7f093d2395b81a32af5e6b54392
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/268d8763bb7846f4c9ebb4fbea476a5bc8fcc389 b/test/core/end2end/fuzzers/api_fuzzer_corpus/268d8763bb7846f4c9ebb4fbea476a5bc8fcc389
new file mode 100644
index 0000000000..abf4177944
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/268d8763bb7846f4c9ebb4fbea476a5bc8fcc389
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/289c2b6211858aa4a46b5b489bc4c9dd47828d21 b/test/core/end2end/fuzzers/api_fuzzer_corpus/289c2b6211858aa4a46b5b489bc4c9dd47828d21
new file mode 100644
index 0000000000..3e05110d4d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/289c2b6211858aa4a46b5b489bc4c9dd47828d21
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/28cbfc7c1b760d216cc592a273088b31833ee707 b/test/core/end2end/fuzzers/api_fuzzer_corpus/28cbfc7c1b760d216cc592a273088b31833ee707
new file mode 100644
index 0000000000..17031bab65
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/28cbfc7c1b760d216cc592a273088b31833ee707
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/28fc3136371b5bcac84045ab6cc93e77298760e2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/28fc3136371b5bcac84045ab6cc93e77298760e2
new file mode 100644
index 0000000000..c31dfa7807
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/28fc3136371b5bcac84045ab6cc93e77298760e2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2a4fc709f61977f0f6c75760af2b33007ecd5941 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2a4fc709f61977f0f6c75760af2b33007ecd5941
new file mode 100644
index 0000000000..8c978ebb5e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2a4fc709f61977f0f6c75760af2b33007ecd5941
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2bb76eff88c5af98c4b8828047837fe97b50cfeb b/test/core/end2end/fuzzers/api_fuzzer_corpus/2bb76eff88c5af98c4b8828047837fe97b50cfeb
new file mode 100644
index 0000000000..0e8dcdbec1
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2bb76eff88c5af98c4b8828047837fe97b50cfeb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2ce3268455c461a30eb30f4792087df411548c13 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2ce3268455c461a30eb30f4792087df411548c13
new file mode 100644
index 0000000000..366221f79b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2ce3268455c461a30eb30f4792087df411548c13
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2d03c424dd0677a68f28bb94536f49844d79d00a b/test/core/end2end/fuzzers/api_fuzzer_corpus/2d03c424dd0677a68f28bb94536f49844d79d00a
new file mode 100644
index 0000000000..a4fb251542
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2d03c424dd0677a68f28bb94536f49844d79d00a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2d743ec0a0826177cfa7ffb335c0034f482e70e5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2d743ec0a0826177cfa7ffb335c0034f482e70e5
new file mode 100644
index 0000000000..5449b346c0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2d743ec0a0826177cfa7ffb335c0034f482e70e5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2dbe958ef23ade1b8bbb9669e590fa99454970b4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2dbe958ef23ade1b8bbb9669e590fa99454970b4
new file mode 100644
index 0000000000..e03e3b8346
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2dbe958ef23ade1b8bbb9669e590fa99454970b4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2df7ea9c0c488fc8f79d33b6bce5667a2f051a65 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2df7ea9c0c488fc8f79d33b6bce5667a2f051a65
new file mode 100644
index 0000000000..61278e101f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2df7ea9c0c488fc8f79d33b6bce5667a2f051a65
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/2feac28b1f508d6086f4cb0972800a77e1d01201 b/test/core/end2end/fuzzers/api_fuzzer_corpus/2feac28b1f508d6086f4cb0972800a77e1d01201
new file mode 100644
index 0000000000..da5b4523d4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/2feac28b1f508d6086f4cb0972800a77e1d01201
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/30738789e20323323196dd3e6435fa278e73279e b/test/core/end2end/fuzzers/api_fuzzer_corpus/30738789e20323323196dd3e6435fa278e73279e
new file mode 100644
index 0000000000..a85ff98407
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/30738789e20323323196dd3e6435fa278e73279e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/307aaef3b3982cf8d4780a1f896d5392037c5db2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/307aaef3b3982cf8d4780a1f896d5392037c5db2
new file mode 100644
index 0000000000..f38bf0e0cb
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/307aaef3b3982cf8d4780a1f896d5392037c5db2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3082fa77cc2942ae425a6577d1f9c0dddd2949be b/test/core/end2end/fuzzers/api_fuzzer_corpus/3082fa77cc2942ae425a6577d1f9c0dddd2949be
new file mode 100644
index 0000000000..380f2805f0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3082fa77cc2942ae425a6577d1f9c0dddd2949be
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/308fbf16b3f3747423b2ff69ef5930b01ca9b728 b/test/core/end2end/fuzzers/api_fuzzer_corpus/308fbf16b3f3747423b2ff69ef5930b01ca9b728
new file mode 100644
index 0000000000..3cd23c5d8e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/308fbf16b3f3747423b2ff69ef5930b01ca9b728
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/30d2e4b3cac45cbcfe76459c90c49e085914c154 b/test/core/end2end/fuzzers/api_fuzzer_corpus/30d2e4b3cac45cbcfe76459c90c49e085914c154
new file mode 100644
index 0000000000..1fbfcfe3b2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/30d2e4b3cac45cbcfe76459c90c49e085914c154
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/315d27e12f2214a56fb9901dacff14852ff2ac0f b/test/core/end2end/fuzzers/api_fuzzer_corpus/315d27e12f2214a56fb9901dacff14852ff2ac0f
new file mode 100644
index 0000000000..379a1576a9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/315d27e12f2214a56fb9901dacff14852ff2ac0f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/31d8226b1d767fc895e87d7feede0e2d7c6c0b66 b/test/core/end2end/fuzzers/api_fuzzer_corpus/31d8226b1d767fc895e87d7feede0e2d7c6c0b66
new file mode 100644
index 0000000000..7ace4ffc84
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/31d8226b1d767fc895e87d7feede0e2d7c6c0b66
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/33252c0d4edb12370235c0179abd87a5efb59d29 b/test/core/end2end/fuzzers/api_fuzzer_corpus/33252c0d4edb12370235c0179abd87a5efb59d29
new file mode 100644
index 0000000000..378afc002f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/33252c0d4edb12370235c0179abd87a5efb59d29
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/33d926a04c1868c3393b3129968ffd32049a1c64 b/test/core/end2end/fuzzers/api_fuzzer_corpus/33d926a04c1868c3393b3129968ffd32049a1c64
new file mode 100644
index 0000000000..dc8950f16f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/33d926a04c1868c3393b3129968ffd32049a1c64
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/33e01fe9738c887b159ca5add342b22c13e526cf b/test/core/end2end/fuzzers/api_fuzzer_corpus/33e01fe9738c887b159ca5add342b22c13e526cf
new file mode 100644
index 0000000000..9b3060c517
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/33e01fe9738c887b159ca5add342b22c13e526cf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/33f0e1b78dd158df720604cbb4c9a0c90eece435 b/test/core/end2end/fuzzers/api_fuzzer_corpus/33f0e1b78dd158df720604cbb4c9a0c90eece435
new file mode 100644
index 0000000000..df5e44292e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/33f0e1b78dd158df720604cbb4c9a0c90eece435
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/34e2445f42fd82c5ce229782a93764def3aae0e7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/34e2445f42fd82c5ce229782a93764def3aae0e7
new file mode 100644
index 0000000000..74452235d9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/34e2445f42fd82c5ce229782a93764def3aae0e7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/352599b2850ac5a96ec656788c897c4b36114cc4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/352599b2850ac5a96ec656788c897c4b36114cc4
new file mode 100644
index 0000000000..4e28b817e4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/352599b2850ac5a96ec656788c897c4b36114cc4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/35d6503b48b5acc5486a158696ae98a98f46e1a4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/35d6503b48b5acc5486a158696ae98a98f46e1a4
new file mode 100644
index 0000000000..348387f6fe
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/35d6503b48b5acc5486a158696ae98a98f46e1a4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/35ea066b0fc90521bd8401ef4c52cdc9897d35d4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/35ea066b0fc90521bd8401ef4c52cdc9897d35d4
new file mode 100644
index 0000000000..e56a34bb71
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/35ea066b0fc90521bd8401ef4c52cdc9897d35d4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/35f172b0168cd0b2da4509c3463c2502274e01a6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/35f172b0168cd0b2da4509c3463c2502274e01a6
new file mode 100644
index 0000000000..f3798b48a0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/35f172b0168cd0b2da4509c3463c2502274e01a6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3698d88414f52b7c4759bfdadb53161b226faf8c b/test/core/end2end/fuzzers/api_fuzzer_corpus/3698d88414f52b7c4759bfdadb53161b226faf8c
new file mode 100644
index 0000000000..945061292d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3698d88414f52b7c4759bfdadb53161b226faf8c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/36dd4f4239b63b9cf379b354de0dc72e6356fba5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/36dd4f4239b63b9cf379b354de0dc72e6356fba5
new file mode 100644
index 0000000000..214d1b660d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/36dd4f4239b63b9cf379b354de0dc72e6356fba5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/38259d219a41c1bc60e3867dc60e3473f98cef64 b/test/core/end2end/fuzzers/api_fuzzer_corpus/38259d219a41c1bc60e3867dc60e3473f98cef64
new file mode 100644
index 0000000000..22707d973f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/38259d219a41c1bc60e3867dc60e3473f98cef64
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/390daee799863cdd0533f35b15b5c0a4f5d79a79 b/test/core/end2end/fuzzers/api_fuzzer_corpus/390daee799863cdd0533f35b15b5c0a4f5d79a79
new file mode 100644
index 0000000000..6feaf9e8d0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/390daee799863cdd0533f35b15b5c0a4f5d79a79
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3a3346314bb9ddaf14877b653cfd506b6ad34fab b/test/core/end2end/fuzzers/api_fuzzer_corpus/3a3346314bb9ddaf14877b653cfd506b6ad34fab
new file mode 100644
index 0000000000..1695b94414
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3a3346314bb9ddaf14877b653cfd506b6ad34fab
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3c942f9491b1e8b5bb9761a4dbb1bc7165850dfc b/test/core/end2end/fuzzers/api_fuzzer_corpus/3c942f9491b1e8b5bb9761a4dbb1bc7165850dfc
new file mode 100644
index 0000000000..a53d26dead
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3c942f9491b1e8b5bb9761a4dbb1bc7165850dfc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3c9a414ad8fcc53c3271bbc8375086d8d1fa450c b/test/core/end2end/fuzzers/api_fuzzer_corpus/3c9a414ad8fcc53c3271bbc8375086d8d1fa450c
new file mode 100644
index 0000000000..e46e0ab65b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3c9a414ad8fcc53c3271bbc8375086d8d1fa450c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3cac506501825fadf2e4adf7619d16f72cfd8832 b/test/core/end2end/fuzzers/api_fuzzer_corpus/3cac506501825fadf2e4adf7619d16f72cfd8832
new file mode 100644
index 0000000000..62447e4f08
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3cac506501825fadf2e4adf7619d16f72cfd8832
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3cc56c99c6046f0d66c50c4062d90608064fd742 b/test/core/end2end/fuzzers/api_fuzzer_corpus/3cc56c99c6046f0d66c50c4062d90608064fd742
new file mode 100644
index 0000000000..4dbb2b9544
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3cc56c99c6046f0d66c50c4062d90608064fd742
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3d929a8f8e77e038ddaecf9d149189cfeeec30fc b/test/core/end2end/fuzzers/api_fuzzer_corpus/3d929a8f8e77e038ddaecf9d149189cfeeec30fc
new file mode 100644
index 0000000000..b6363011f3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3d929a8f8e77e038ddaecf9d149189cfeeec30fc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3de19989758b5b68b29af3dfc6c0e55d414dca32 b/test/core/end2end/fuzzers/api_fuzzer_corpus/3de19989758b5b68b29af3dfc6c0e55d414dca32
new file mode 100644
index 0000000000..e51ac9d8a9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3de19989758b5b68b29af3dfc6c0e55d414dca32
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3e82319f1a44ea9224d65feb07ee0ef622709dac b/test/core/end2end/fuzzers/api_fuzzer_corpus/3e82319f1a44ea9224d65feb07ee0ef622709dac
new file mode 100644
index 0000000000..26735fe923
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3e82319f1a44ea9224d65feb07ee0ef622709dac
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/3f2429e3255ae36fecb57559b57d2b0cb88f5dd1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/3f2429e3255ae36fecb57559b57d2b0cb88f5dd1
new file mode 100644
index 0000000000..83419944d4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/3f2429e3255ae36fecb57559b57d2b0cb88f5dd1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4004d9ccc668572796770fb3401376844e1574ae b/test/core/end2end/fuzzers/api_fuzzer_corpus/4004d9ccc668572796770fb3401376844e1574ae
new file mode 100644
index 0000000000..81687230a1
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4004d9ccc668572796770fb3401376844e1574ae
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/40640a91fda4e4e42d3063a28b9ffbba1b8c3701 b/test/core/end2end/fuzzers/api_fuzzer_corpus/40640a91fda4e4e42d3063a28b9ffbba1b8c3701
new file mode 100644
index 0000000000..f11821acc9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/40640a91fda4e4e42d3063a28b9ffbba1b8c3701
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/409d7e2c0173b5a00a475f79e2fbdbe596d8368a b/test/core/end2end/fuzzers/api_fuzzer_corpus/409d7e2c0173b5a00a475f79e2fbdbe596d8368a
new file mode 100644
index 0000000000..75d8f1c0a6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/409d7e2c0173b5a00a475f79e2fbdbe596d8368a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/41bda7ff09175f821992adf4314a8ec3007ffe55 b/test/core/end2end/fuzzers/api_fuzzer_corpus/41bda7ff09175f821992adf4314a8ec3007ffe55
new file mode 100644
index 0000000000..a89e88e48f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/41bda7ff09175f821992adf4314a8ec3007ffe55
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/421feb3fe383541082a65a447a51b4af991ceb7e b/test/core/end2end/fuzzers/api_fuzzer_corpus/421feb3fe383541082a65a447a51b4af991ceb7e
new file mode 100644
index 0000000000..45223cd69a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/421feb3fe383541082a65a447a51b4af991ceb7e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/42231300ca5cf30d18f55b66020926882c64248c b/test/core/end2end/fuzzers/api_fuzzer_corpus/42231300ca5cf30d18f55b66020926882c64248c
new file mode 100644
index 0000000000..0119532390
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/42231300ca5cf30d18f55b66020926882c64248c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4239c3636053665277d07bafda37ee84c114b13a b/test/core/end2end/fuzzers/api_fuzzer_corpus/4239c3636053665277d07bafda37ee84c114b13a
new file mode 100644
index 0000000000..04acde15fe
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4239c3636053665277d07bafda37ee84c114b13a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/424b6a20be32318d920d83aa2a292a0aba013a1b b/test/core/end2end/fuzzers/api_fuzzer_corpus/424b6a20be32318d920d83aa2a292a0aba013a1b
new file mode 100644
index 0000000000..00026e71b9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/424b6a20be32318d920d83aa2a292a0aba013a1b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/426b7f180ab26cf276a223246d4d6bd972ccf55a b/test/core/end2end/fuzzers/api_fuzzer_corpus/426b7f180ab26cf276a223246d4d6bd972ccf55a
new file mode 100644
index 0000000000..3e0a69e059
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/426b7f180ab26cf276a223246d4d6bd972ccf55a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/428cce92c42645f4cc4060a8cb9cef3a803c0341 b/test/core/end2end/fuzzers/api_fuzzer_corpus/428cce92c42645f4cc4060a8cb9cef3a803c0341
new file mode 100644
index 0000000000..39faa0d693
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/428cce92c42645f4cc4060a8cb9cef3a803c0341
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/43cdc82b082bbdc4d7d23437a7f761f1ca32ca73 b/test/core/end2end/fuzzers/api_fuzzer_corpus/43cdc82b082bbdc4d7d23437a7f761f1ca32ca73
new file mode 100644
index 0000000000..c8250c8ccf
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/43cdc82b082bbdc4d7d23437a7f761f1ca32ca73
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/43f8e0abe3f647350ab1d8d368cca9af6ca47729 b/test/core/end2end/fuzzers/api_fuzzer_corpus/43f8e0abe3f647350ab1d8d368cca9af6ca47729
new file mode 100644
index 0000000000..344491e610
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/43f8e0abe3f647350ab1d8d368cca9af6ca47729
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/448fc1dc939aa7f398f1577e418630abecc0a1d7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/448fc1dc939aa7f398f1577e418630abecc0a1d7
new file mode 100644
index 0000000000..d5f631429e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/448fc1dc939aa7f398f1577e418630abecc0a1d7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4523e89844538d8de502907f143c35624182f76c b/test/core/end2end/fuzzers/api_fuzzer_corpus/4523e89844538d8de502907f143c35624182f76c
new file mode 100644
index 0000000000..9f89f26778
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4523e89844538d8de502907f143c35624182f76c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/453861de5ab948236f13ebff66c8e82e4e789db6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/453861de5ab948236f13ebff66c8e82e4e789db6
new file mode 100644
index 0000000000..9ebd8ae533
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/453861de5ab948236f13ebff66c8e82e4e789db6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/46171f477d11338f4cc948915350772d54319200 b/test/core/end2end/fuzzers/api_fuzzer_corpus/46171f477d11338f4cc948915350772d54319200
new file mode 100644
index 0000000000..df032667c6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/46171f477d11338f4cc948915350772d54319200
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/46e1492e19d0cffdadc1050cc22d505b4e057759 b/test/core/end2end/fuzzers/api_fuzzer_corpus/46e1492e19d0cffdadc1050cc22d505b4e057759
new file mode 100644
index 0000000000..34bdf1fc73
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/46e1492e19d0cffdadc1050cc22d505b4e057759
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4725b858491e1517af1032efba6bb198f39fd62d b/test/core/end2end/fuzzers/api_fuzzer_corpus/4725b858491e1517af1032efba6bb198f39fd62d
new file mode 100644
index 0000000000..860a36c6dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4725b858491e1517af1032efba6bb198f39fd62d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/48062d4824e8ba697cdd16a46b85d82ff445e649 b/test/core/end2end/fuzzers/api_fuzzer_corpus/48062d4824e8ba697cdd16a46b85d82ff445e649
new file mode 100644
index 0000000000..f472b3ba56
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/48062d4824e8ba697cdd16a46b85d82ff445e649
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4857011f92ceaed4fee4d7612e1c46930903c95b b/test/core/end2end/fuzzers/api_fuzzer_corpus/4857011f92ceaed4fee4d7612e1c46930903c95b
new file mode 100644
index 0000000000..e94c7cb43c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4857011f92ceaed4fee4d7612e1c46930903c95b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/48c1691a919f1055f748e43cd799770f00c1c38a b/test/core/end2end/fuzzers/api_fuzzer_corpus/48c1691a919f1055f748e43cd799770f00c1c38a
new file mode 100644
index 0000000000..3f0b5edf14
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/48c1691a919f1055f748e43cd799770f00c1c38a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/49254390bbc7e7b9eb58ddb1ac54a1e7eacee168 b/test/core/end2end/fuzzers/api_fuzzer_corpus/49254390bbc7e7b9eb58ddb1ac54a1e7eacee168
new file mode 100644
index 0000000000..b5418cf46d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/49254390bbc7e7b9eb58ddb1ac54a1e7eacee168
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/49d0085058d7fa81247f51b802c0f4206854b4dc b/test/core/end2end/fuzzers/api_fuzzer_corpus/49d0085058d7fa81247f51b802c0f4206854b4dc
new file mode 100644
index 0000000000..052fa854ee
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/49d0085058d7fa81247f51b802c0f4206854b4dc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/49f564289c79de9e0342f8b0821a167bc8c5ec00 b/test/core/end2end/fuzzers/api_fuzzer_corpus/49f564289c79de9e0342f8b0821a167bc8c5ec00
new file mode 100644
index 0000000000..c846377f0a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/49f564289c79de9e0342f8b0821a167bc8c5ec00
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4a5a1abe7b402338c625013caa9bc8464a3d0bf2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/4a5a1abe7b402338c625013caa9bc8464a3d0bf2
new file mode 100644
index 0000000000..7ad87be818
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4a5a1abe7b402338c625013caa9bc8464a3d0bf2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4ad1a61051d0db46638b774c61392b9d1c360410 b/test/core/end2end/fuzzers/api_fuzzer_corpus/4ad1a61051d0db46638b774c61392b9d1c360410
new file mode 100644
index 0000000000..08cdf0e22e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4ad1a61051d0db46638b774c61392b9d1c360410
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4aecde7ffaea881f42e693858b25c334df711b27 b/test/core/end2end/fuzzers/api_fuzzer_corpus/4aecde7ffaea881f42e693858b25c334df711b27
new file mode 100644
index 0000000000..651d85f44b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4aecde7ffaea881f42e693858b25c334df711b27
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4b0e9a84edc3eb0e6c377e860f5ecfca1bf64baa b/test/core/end2end/fuzzers/api_fuzzer_corpus/4b0e9a84edc3eb0e6c377e860f5ecfca1bf64baa
new file mode 100644
index 0000000000..23a36273dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4b0e9a84edc3eb0e6c377e860f5ecfca1bf64baa
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/4b303d7f245a569f507013af0b3afb2f033b6741 b/test/core/end2end/fuzzers/api_fuzzer_corpus/4b303d7f245a569f507013af0b3afb2f033b6741
new file mode 100644
index 0000000000..47d9819eec
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/4b303d7f245a569f507013af0b3afb2f033b6741
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5035db01a56a34061837c4d0214f6e5112d81ff3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5035db01a56a34061837c4d0214f6e5112d81ff3
new file mode 100644
index 0000000000..a2e1b259bf
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/5035db01a56a34061837c4d0214f6e5112d81ff3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/503649137cea18ced8a57e7c644162bee8885ed1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/503649137cea18ced8a57e7c644162bee8885ed1
new file mode 100644
index 0000000000..58fba3d841
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/503649137cea18ced8a57e7c644162bee8885ed1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/507865c4a5ce880b80400d93fa85def2682581cb b/test/core/end2end/fuzzers/api_fuzzer_corpus/507865c4a5ce880b80400d93fa85def2682581cb
new file mode 100644
index 0000000000..c4473eacbb
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/507865c4a5ce880b80400d93fa85def2682581cb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/51716d5683d5c762298fdfa6b57ecf17d6892fe6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/51716d5683d5c762298fdfa6b57ecf17d6892fe6
new file mode 100644
index 0000000000..a8d3674c7e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/51716d5683d5c762298fdfa6b57ecf17d6892fe6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/51adadd4662ab165a203afdbdbc470b62ac24d36 b/test/core/end2end/fuzzers/api_fuzzer_corpus/51adadd4662ab165a203afdbdbc470b62ac24d36
new file mode 100644
index 0000000000..c27014a928
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/51adadd4662ab165a203afdbdbc470b62ac24d36
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/51ea84d5a790d3d2495be453f5341c41b6153644 b/test/core/end2end/fuzzers/api_fuzzer_corpus/51ea84d5a790d3d2495be453f5341c41b6153644
new file mode 100644
index 0000000000..df8ee081bf
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/51ea84d5a790d3d2495be453f5341c41b6153644
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/52ac4e5a6c433b7e135e817b797f9bc85d4c619a b/test/core/end2end/fuzzers/api_fuzzer_corpus/52ac4e5a6c433b7e135e817b797f9bc85d4c619a
new file mode 100644
index 0000000000..44746e47bd
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/52ac4e5a6c433b7e135e817b797f9bc85d4c619a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/536b5c0bf942c03bf9d4a4cc27c97c1230128ede b/test/core/end2end/fuzzers/api_fuzzer_corpus/536b5c0bf942c03bf9d4a4cc27c97c1230128ede
new file mode 100644
index 0000000000..f6d08b9b92
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/536b5c0bf942c03bf9d4a4cc27c97c1230128ede
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/53e7030d5de06dcf80e1a60aa467e6e31bec6515 b/test/core/end2end/fuzzers/api_fuzzer_corpus/53e7030d5de06dcf80e1a60aa467e6e31bec6515
new file mode 100644
index 0000000000..dd161f0425
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/53e7030d5de06dcf80e1a60aa467e6e31bec6515
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/54168e5030c8a7cdd58162dee7c2583bb4caaf64 b/test/core/end2end/fuzzers/api_fuzzer_corpus/54168e5030c8a7cdd58162dee7c2583bb4caaf64
new file mode 100644
index 0000000000..459a76b114
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/54168e5030c8a7cdd58162dee7c2583bb4caaf64
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5547a3544fc5c634024d546366704547dd72cc2b b/test/core/end2end/fuzzers/api_fuzzer_corpus/5547a3544fc5c634024d546366704547dd72cc2b
new file mode 100644
index 0000000000..9e6f5b687d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/5547a3544fc5c634024d546366704547dd72cc2b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5559428fa9a1f1701e81eec11a3571be403bf627 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5559428fa9a1f1701e81eec11a3571be403bf627
new file mode 100644
index 0000000000..180929895c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/5559428fa9a1f1701e81eec11a3571be403bf627
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/559d537675dd3fc5e0c6d40e94133e9016014f6c b/test/core/end2end/fuzzers/api_fuzzer_corpus/559d537675dd3fc5e0c6d40e94133e9016014f6c
new file mode 100644
index 0000000000..25327f398f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/559d537675dd3fc5e0c6d40e94133e9016014f6c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/55a71f74f233ea8ce88967c5660aaa532fbc985c b/test/core/end2end/fuzzers/api_fuzzer_corpus/55a71f74f233ea8ce88967c5660aaa532fbc985c
new file mode 100644
index 0000000000..d02a29d612
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/55a71f74f233ea8ce88967c5660aaa532fbc985c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/55da9fe903905e9852dedf6b664a4a589efeeec5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/55da9fe903905e9852dedf6b664a4a589efeeec5
new file mode 100644
index 0000000000..8118bbbbb5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/55da9fe903905e9852dedf6b664a4a589efeeec5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/567026bafbad3be6a7bd430577e7d39ec3d56af6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/567026bafbad3be6a7bd430577e7d39ec3d56af6
new file mode 100644
index 0000000000..1d6e37a6e4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/567026bafbad3be6a7bd430577e7d39ec3d56af6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/56f240463ef197b49c7e271e74412f62909974dc b/test/core/end2end/fuzzers/api_fuzzer_corpus/56f240463ef197b49c7e271e74412f62909974dc
new file mode 100644
index 0000000000..4f77004c7f
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/57b087d753a6af79c0b58ca2c9aa5c92bc18a6a5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/57b087d753a6af79c0b58ca2c9aa5c92bc18a6a5
new file mode 100644
index 0000000000..af1031c03f
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/59b547627a6b1aef96f6c5e3b7dc08c3e1244368 b/test/core/end2end/fuzzers/api_fuzzer_corpus/59b547627a6b1aef96f6c5e3b7dc08c3e1244368
new file mode 100644
index 0000000000..efc8af908d
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5ac0e42338f7b064f5c23697f1174a10b42e7ed8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5ac0e42338f7b064f5c23697f1174a10b42e7ed8
new file mode 100644
index 0000000000..1cce5cecff
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5ac8cb08604c86b9e8ca24482ca963eddac2efbe b/test/core/end2end/fuzzers/api_fuzzer_corpus/5ac8cb08604c86b9e8ca24482ca963eddac2efbe
new file mode 100644
index 0000000000..9a2cafda5f
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5bc4eddc2a2881d4b6b4f9532f4fb381e4cc9529 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5bc4eddc2a2881d4b6b4f9532f4fb381e4cc9529
new file mode 100644
index 0000000000..9fa502fe69
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5be0001be32d9e619769c7cc6cb9f541efe4996c b/test/core/end2end/fuzzers/api_fuzzer_corpus/5be0001be32d9e619769c7cc6cb9f541efe4996c
new file mode 100644
index 0000000000..c42fa29f51
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5c6debdb92eb9089773cc8d092d7f62d521ae029 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5c6debdb92eb9089773cc8d092d7f62d521ae029
new file mode 100644
index 0000000000..ee6dfef51a
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5cfdc00a568d97b09e720a72eac7e5fbbf76247b b/test/core/end2end/fuzzers/api_fuzzer_corpus/5cfdc00a568d97b09e720a72eac7e5fbbf76247b
new file mode 100644
index 0000000000..6a74f12ef6
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5da1a1a4ee88d2a2b6e9470dd7be9e2dd9eecc4d b/test/core/end2end/fuzzers/api_fuzzer_corpus/5da1a1a4ee88d2a2b6e9470dd7be9e2dd9eecc4d
new file mode 100644
index 0000000000..65b8542d2b
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5e0c4179d297f5bafe86b9e256bf75d54cfd1fb0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5e0c4179d297f5bafe86b9e256bf75d54cfd1fb0
new file mode 100644
index 0000000000..e8de3ad562
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5eeb786fa5735ef9b98c40e205f2eba24223acfd b/test/core/end2end/fuzzers/api_fuzzer_corpus/5eeb786fa5735ef9b98c40e205f2eba24223acfd
new file mode 100644
index 0000000000..783110dd22
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5f2fdb01d8ff632803ca2b732a7c088c6843d7d3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5f2fdb01d8ff632803ca2b732a7c088c6843d7d3
new file mode 100644
index 0000000000..b91a052534
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5f3a4ed52525d1db60b45d79057a6e276395e562 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5f3a4ed52525d1db60b45d79057a6e276395e562
new file mode 100644
index 0000000000..25d6cdac55
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/5fbffd9d324ad078bf6f5fdd39e5e4a27afd5965 b/test/core/end2end/fuzzers/api_fuzzer_corpus/5fbffd9d324ad078bf6f5fdd39e5e4a27afd5965
new file mode 100644
index 0000000000..2f4a3d9f34
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/5fbffd9d324ad078bf6f5fdd39e5e4a27afd5965
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6042b1bbaf3ceac51c11a472ea07a75e822b7bc5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6042b1bbaf3ceac51c11a472ea07a75e822b7bc5
new file mode 100644
index 0000000000..1a4e8afff3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/6042b1bbaf3ceac51c11a472ea07a75e822b7bc5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/60b4c79213b97204d1e4f6819ad1ed5f6e191789 b/test/core/end2end/fuzzers/api_fuzzer_corpus/60b4c79213b97204d1e4f6819ad1ed5f6e191789
new file mode 100644
index 0000000000..2c44e5da5c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/60b4c79213b97204d1e4f6819ad1ed5f6e191789
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/60eec02f3b3aa23b12261ed00163d122b24ab5af b/test/core/end2end/fuzzers/api_fuzzer_corpus/60eec02f3b3aa23b12261ed00163d122b24ab5af
new file mode 100644
index 0000000000..5db740469d
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6108ac96de85e973db42982eff9d2f877a36699d b/test/core/end2end/fuzzers/api_fuzzer_corpus/6108ac96de85e973db42982eff9d2f877a36699d
new file mode 100644
index 0000000000..8959111a05
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/614dbc86b17270ef1d5ab705ecbe88c742815ce7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/614dbc86b17270ef1d5ab705ecbe88c742815ce7
new file mode 100644
index 0000000000..8fdff18222
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/61de97a9d6c4b082602c02277d8d763921f5f95b b/test/core/end2end/fuzzers/api_fuzzer_corpus/61de97a9d6c4b082602c02277d8d763921f5f95b
new file mode 100644
index 0000000000..a24008b1d4
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/62515c0e559e40838126e5be6ede5440875a3f70 b/test/core/end2end/fuzzers/api_fuzzer_corpus/62515c0e559e40838126e5be6ede5440875a3f70
new file mode 100644
index 0000000000..3dc4c18fd4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/62515c0e559e40838126e5be6ede5440875a3f70
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/62b039b8a318cc08471f13629da08c68c414d8e7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/62b039b8a318cc08471f13629da08c68c414d8e7
new file mode 100644
index 0000000000..e5e218acc3
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/63f1e7c7eb4d0ee635c3794993d2e2132cba72d4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/63f1e7c7eb4d0ee635c3794993d2e2132cba72d4
new file mode 100644
index 0000000000..722c8a67d3
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/641739453f7d4d3b55a1c7b79bed7da6dfd62ae0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/641739453f7d4d3b55a1c7b79bed7da6dfd62ae0
new file mode 100644
index 0000000000..9dcc5c578c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/641739453f7d4d3b55a1c7b79bed7da6dfd62ae0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/64656ddf81738f914ead8003c19d0148c54f34d6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/64656ddf81738f914ead8003c19d0148c54f34d6
new file mode 100644
index 0000000000..daf5bc14b1
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/64d1666dc1b1126bb99e3792040dff64b336ae36 b/test/core/end2end/fuzzers/api_fuzzer_corpus/64d1666dc1b1126bb99e3792040dff64b336ae36
new file mode 100644
index 0000000000..f5a526ce37
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/64d410e245db26eb7996c20bee1e3dfd77c43ebc b/test/core/end2end/fuzzers/api_fuzzer_corpus/64d410e245db26eb7996c20bee1e3dfd77c43ebc
new file mode 100644
index 0000000000..dd97b425ed
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6589505362ffb5164a3c7cb1b9feadcddfba44e9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6589505362ffb5164a3c7cb1b9feadcddfba44e9
new file mode 100644
index 0000000000..10625da2ff
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/671d63b9968444308d4908eb6a26bccdf32e5e29 b/test/core/end2end/fuzzers/api_fuzzer_corpus/671d63b9968444308d4908eb6a26bccdf32e5e29
new file mode 100644
index 0000000000..38c69c7893
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6757865ccfef9bf8f1ba4302be9767758390fa92 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6757865ccfef9bf8f1ba4302be9767758390fa92
new file mode 100644
index 0000000000..4c2914d3ac
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/681b758cad3bbce4bde2d1a78a2ec4600c59b05c b/test/core/end2end/fuzzers/api_fuzzer_corpus/681b758cad3bbce4bde2d1a78a2ec4600c59b05c
new file mode 100644
index 0000000000..d54a2af33d
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/68359027351be494040cc9ae6d4ccfc248fe6fcd b/test/core/end2end/fuzzers/api_fuzzer_corpus/68359027351be494040cc9ae6d4ccfc248fe6fcd
new file mode 100644
index 0000000000..554a83bf46
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6951632faa6eee58b6480b7cae00ee8ea1223658 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6951632faa6eee58b6480b7cae00ee8ea1223658
new file mode 100644
index 0000000000..76d8c7dacd
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/6951632faa6eee58b6480b7cae00ee8ea1223658
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/69c6c28a67fe1b5ea32cab0f06564c59ec3fcbab b/test/core/end2end/fuzzers/api_fuzzer_corpus/69c6c28a67fe1b5ea32cab0f06564c59ec3fcbab
new file mode 100644
index 0000000000..1d17649497
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6a2b1a1222017169ff83695bb42bf760c8126a2d b/test/core/end2end/fuzzers/api_fuzzer_corpus/6a2b1a1222017169ff83695bb42bf760c8126a2d
new file mode 100644
index 0000000000..f25505780b
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6a3dee1cefadc15954dafe424c73b78a3b5c1b22 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6a3dee1cefadc15954dafe424c73b78a3b5c1b22
new file mode 100644
index 0000000000..3dee8d06ce
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/6a3dee1cefadc15954dafe424c73b78a3b5c1b22
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6ad3a1170ef884a884a6f340101549df624bf5a4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6ad3a1170ef884a884a6f340101549df624bf5a4
new file mode 100644
index 0000000000..27cea9ee0c
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6ae25d59c9f771291edddc6c71d01c855883b99b b/test/core/end2end/fuzzers/api_fuzzer_corpus/6ae25d59c9f771291edddc6c71d01c855883b99b
new file mode 100644
index 0000000000..dede6d1ece
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6cb17148d52be437332b6fd6f2fc8328bfb63fb0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6cb17148d52be437332b6fd6f2fc8328bfb63fb0
new file mode 100644
index 0000000000..36d98fea76
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6ea192b1d4c4577ca7511f8ce5027b31b2e0d75d b/test/core/end2end/fuzzers/api_fuzzer_corpus/6ea192b1d4c4577ca7511f8ce5027b31b2e0d75d
new file mode 100644
index 0000000000..a31fcf596c
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6ed943877a76ab6b17443e5b194012d9008612ad b/test/core/end2end/fuzzers/api_fuzzer_corpus/6ed943877a76ab6b17443e5b194012d9008612ad
new file mode 100644
index 0000000000..35078764b7
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/6eef551288136e9fb2d9de210b14148746203472 b/test/core/end2end/fuzzers/api_fuzzer_corpus/6eef551288136e9fb2d9de210b14148746203472
new file mode 100644
index 0000000000..8f838a4410
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/70cf4c8bdd833f8c62d8c89ef50d50008457f5ac b/test/core/end2end/fuzzers/api_fuzzer_corpus/70cf4c8bdd833f8c62d8c89ef50d50008457f5ac
new file mode 100644
index 0000000000..f40f24f06a
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/71403746b8e54a5f9b6fa1882a7ff5322180dd01 b/test/core/end2end/fuzzers/api_fuzzer_corpus/71403746b8e54a5f9b6fa1882a7ff5322180dd01
new file mode 100644
index 0000000000..ce9f217b99
--- /dev/null
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diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/71961e53698b07bfd57e9ea37067e0dd52298a3d b/test/core/end2end/fuzzers/api_fuzzer_corpus/71961e53698b07bfd57e9ea37067e0dd52298a3d
new file mode 100644
index 0000000000..21a263f870
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/71961e53698b07bfd57e9ea37067e0dd52298a3d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/71a0dd688553c753919c58d00c8e8db130726b3b b/test/core/end2end/fuzzers/api_fuzzer_corpus/71a0dd688553c753919c58d00c8e8db130726b3b
new file mode 100644
index 0000000000..940e57971f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/71a0dd688553c753919c58d00c8e8db130726b3b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/71cbd5e4e98344dd16df8b21546439cdb0879e0f b/test/core/end2end/fuzzers/api_fuzzer_corpus/71cbd5e4e98344dd16df8b21546439cdb0879e0f
new file mode 100644
index 0000000000..3ca83e18fd
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/71cbd5e4e98344dd16df8b21546439cdb0879e0f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/72031f24261c32d2e3bb2c7909a9315227172730 b/test/core/end2end/fuzzers/api_fuzzer_corpus/72031f24261c32d2e3bb2c7909a9315227172730
new file mode 100644
index 0000000000..b02f72e6be
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/72031f24261c32d2e3bb2c7909a9315227172730
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/724f5400f19e5a0be97022341c39eeaaaffeb390 b/test/core/end2end/fuzzers/api_fuzzer_corpus/724f5400f19e5a0be97022341c39eeaaaffeb390
new file mode 100644
index 0000000000..1dbc538192
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/724f5400f19e5a0be97022341c39eeaaaffeb390
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7254b9ff59ab3fcf345effdabbc25ebd2e907b23 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7254b9ff59ab3fcf345effdabbc25ebd2e907b23
new file mode 100644
index 0000000000..92371e031f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7254b9ff59ab3fcf345effdabbc25ebd2e907b23
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/746477e7e8f093f87cb6924ab6476cda9689607d b/test/core/end2end/fuzzers/api_fuzzer_corpus/746477e7e8f093f87cb6924ab6476cda9689607d
new file mode 100644
index 0000000000..e348c19028
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/746477e7e8f093f87cb6924ab6476cda9689607d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/750668bd25d3c4d5c8ff863185749d31978b88e5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/750668bd25d3c4d5c8ff863185749d31978b88e5
new file mode 100644
index 0000000000..7d4f440256
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/750668bd25d3c4d5c8ff863185749d31978b88e5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/755e5b679c1bb2720590e166d5047588a0e2f8b0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/755e5b679c1bb2720590e166d5047588a0e2f8b0
new file mode 100644
index 0000000000..35af128410
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/755e5b679c1bb2720590e166d5047588a0e2f8b0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/75af1ed0b83b24a1d5201038a4b382d0ace6222f b/test/core/end2end/fuzzers/api_fuzzer_corpus/75af1ed0b83b24a1d5201038a4b382d0ace6222f
new file mode 100644
index 0000000000..7040b2fc20
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/75af1ed0b83b24a1d5201038a4b382d0ace6222f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/75cd5b751f530f494c224304b4024d490032e65a b/test/core/end2end/fuzzers/api_fuzzer_corpus/75cd5b751f530f494c224304b4024d490032e65a
new file mode 100644
index 0000000000..34240388e5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/75cd5b751f530f494c224304b4024d490032e65a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/75f9b79cacbfef018bb131af2e2ba0735b2640ec b/test/core/end2end/fuzzers/api_fuzzer_corpus/75f9b79cacbfef018bb131af2e2ba0735b2640ec
new file mode 100644
index 0000000000..0bbc39c9c6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/75f9b79cacbfef018bb131af2e2ba0735b2640ec
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/76116b26156d91b16a70f28a126ed5f05ce55548 b/test/core/end2end/fuzzers/api_fuzzer_corpus/76116b26156d91b16a70f28a126ed5f05ce55548
new file mode 100644
index 0000000000..97890454d6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/76116b26156d91b16a70f28a126ed5f05ce55548
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/766995b9faa25c3b2c825413e5e9a702721de7fa b/test/core/end2end/fuzzers/api_fuzzer_corpus/766995b9faa25c3b2c825413e5e9a702721de7fa
new file mode 100644
index 0000000000..4c281a8555
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/766995b9faa25c3b2c825413e5e9a702721de7fa
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7752153d87017b85112a49ea95aa25ca78d24431 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7752153d87017b85112a49ea95aa25ca78d24431
new file mode 100644
index 0000000000..8e9b21a777
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7752153d87017b85112a49ea95aa25ca78d24431
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/77f4f436f910c45f216fe4d3f9b631612ed09cf6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/77f4f436f910c45f216fe4d3f9b631612ed09cf6
new file mode 100644
index 0000000000..8e31ee64e0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/77f4f436f910c45f216fe4d3f9b631612ed09cf6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/780fc96dea7f78bb9d1a074efbd966b03d78d653 b/test/core/end2end/fuzzers/api_fuzzer_corpus/780fc96dea7f78bb9d1a074efbd966b03d78d653
new file mode 100644
index 0000000000..56d52f326d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/780fc96dea7f78bb9d1a074efbd966b03d78d653
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/783484ad9e15085e9039c7504aac71af1ad549a2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/783484ad9e15085e9039c7504aac71af1ad549a2
new file mode 100644
index 0000000000..cdee9cfeb9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/783484ad9e15085e9039c7504aac71af1ad549a2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/784ca396c157df8ba93bbe1e12c6d32609ef05a1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/784ca396c157df8ba93bbe1e12c6d32609ef05a1
new file mode 100644
index 0000000000..d601edf985
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/784ca396c157df8ba93bbe1e12c6d32609ef05a1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/784d6f5c093ab5360670173ce001e1a446f95822 b/test/core/end2end/fuzzers/api_fuzzer_corpus/784d6f5c093ab5360670173ce001e1a446f95822
new file mode 100644
index 0000000000..79885b7f2a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/784d6f5c093ab5360670173ce001e1a446f95822
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/78e43d163fc8226d72b979c0fe6e1593ef3cb542 b/test/core/end2end/fuzzers/api_fuzzer_corpus/78e43d163fc8226d72b979c0fe6e1593ef3cb542
new file mode 100644
index 0000000000..e3470adec6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/78e43d163fc8226d72b979c0fe6e1593ef3cb542
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/79163c87e1c3340d05799cf27f1e898a932d1001 b/test/core/end2end/fuzzers/api_fuzzer_corpus/79163c87e1c3340d05799cf27f1e898a932d1001
new file mode 100644
index 0000000000..705aef2998
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/79163c87e1c3340d05799cf27f1e898a932d1001
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/79328fdc89d0af0e38da089dab062fd3ea5aae59 b/test/core/end2end/fuzzers/api_fuzzer_corpus/79328fdc89d0af0e38da089dab062fd3ea5aae59
new file mode 100644
index 0000000000..4a5cbfd654
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/79328fdc89d0af0e38da089dab062fd3ea5aae59
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/795912f4ca380c73a3a3c956b1cba1e9051d92bf b/test/core/end2end/fuzzers/api_fuzzer_corpus/795912f4ca380c73a3a3c956b1cba1e9051d92bf
new file mode 100644
index 0000000000..2972f6c0c5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/795912f4ca380c73a3a3c956b1cba1e9051d92bf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7a2569f4daf4480ad142cb4ee7c675bed82db74c b/test/core/end2end/fuzzers/api_fuzzer_corpus/7a2569f4daf4480ad142cb4ee7c675bed82db74c
new file mode 100644
index 0000000000..75b55e7e10
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7a2569f4daf4480ad142cb4ee7c675bed82db74c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7b3a99b69df9931fe12dfce5d8c5153f43bf4fd9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7b3a99b69df9931fe12dfce5d8c5153f43bf4fd9
new file mode 100644
index 0000000000..561c5f7e2c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7b3a99b69df9931fe12dfce5d8c5153f43bf4fd9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7b5a71e770bf9eed928f5e552a7659f8ad8a8b84 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7b5a71e770bf9eed928f5e552a7659f8ad8a8b84
new file mode 100644
index 0000000000..3b5933e3c9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7b5a71e770bf9eed928f5e552a7659f8ad8a8b84
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7cae7e5c67636a72a00785e04cc55af57b9e1318 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7cae7e5c67636a72a00785e04cc55af57b9e1318
new file mode 100644
index 0000000000..be188e6cbc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7cae7e5c67636a72a00785e04cc55af57b9e1318
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7e75ea44aa7347c2f827beecb27e3bf5b1907b8a b/test/core/end2end/fuzzers/api_fuzzer_corpus/7e75ea44aa7347c2f827beecb27e3bf5b1907b8a
new file mode 100644
index 0000000000..c5963737d3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7e75ea44aa7347c2f827beecb27e3bf5b1907b8a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7fb64b5785ebe699ca50327c88c1d8b99432fa23 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7fb64b5785ebe699ca50327c88c1d8b99432fa23
new file mode 100644
index 0000000000..21802ec5ee
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7fb64b5785ebe699ca50327c88c1d8b99432fa23
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/7ff449b555102deaeea7245b5a370dd0820d2691 b/test/core/end2end/fuzzers/api_fuzzer_corpus/7ff449b555102deaeea7245b5a370dd0820d2691
new file mode 100644
index 0000000000..d0e0587e49
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/7ff449b555102deaeea7245b5a370dd0820d2691
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8005d0a23f43613949321e9fc761180cdcd569c8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8005d0a23f43613949321e9fc761180cdcd569c8
new file mode 100644
index 0000000000..1a2385c7ed
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8005d0a23f43613949321e9fc761180cdcd569c8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/807a48bd33ce375438dbc158c1531891c5b54a51 b/test/core/end2end/fuzzers/api_fuzzer_corpus/807a48bd33ce375438dbc158c1531891c5b54a51
new file mode 100644
index 0000000000..4fd3b4cdc0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/807a48bd33ce375438dbc158c1531891c5b54a51
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/80d4266aee0b8b7dca74696dde949ebfaa052535 b/test/core/end2end/fuzzers/api_fuzzer_corpus/80d4266aee0b8b7dca74696dde949ebfaa052535
new file mode 100644
index 0000000000..26585324a8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/80d4266aee0b8b7dca74696dde949ebfaa052535
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/817570ac3bbeab63961d78aa2fef496e87c7e056 b/test/core/end2end/fuzzers/api_fuzzer_corpus/817570ac3bbeab63961d78aa2fef496e87c7e056
new file mode 100644
index 0000000000..36adfeb2a2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/817570ac3bbeab63961d78aa2fef496e87c7e056
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/823ef8523d3d3d90578d32e09e6822eb9ed42ecf b/test/core/end2end/fuzzers/api_fuzzer_corpus/823ef8523d3d3d90578d32e09e6822eb9ed42ecf
new file mode 100644
index 0000000000..530dd554b7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/823ef8523d3d3d90578d32e09e6822eb9ed42ecf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/826c36b53a0f249c139de4aec6fb113a70af3b6a b/test/core/end2end/fuzzers/api_fuzzer_corpus/826c36b53a0f249c139de4aec6fb113a70af3b6a
new file mode 100644
index 0000000000..108f7150b0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/826c36b53a0f249c139de4aec6fb113a70af3b6a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/82731abc38788755495b1bac7b58bc0f12e4bdd1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/82731abc38788755495b1bac7b58bc0f12e4bdd1
new file mode 100644
index 0000000000..20c7c70f83
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/82731abc38788755495b1bac7b58bc0f12e4bdd1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/835062d78983dae5747ab4e207d227869ce90733 b/test/core/end2end/fuzzers/api_fuzzer_corpus/835062d78983dae5747ab4e207d227869ce90733
new file mode 100644
index 0000000000..1422c0640f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/835062d78983dae5747ab4e207d227869ce90733
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/83776278a4997b0d178602c8419f3e6481dec01d b/test/core/end2end/fuzzers/api_fuzzer_corpus/83776278a4997b0d178602c8419f3e6481dec01d
new file mode 100644
index 0000000000..2570ea8bc6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/83776278a4997b0d178602c8419f3e6481dec01d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/837db5272d730107ae362fcd3cb2c21e5f1ea53e b/test/core/end2end/fuzzers/api_fuzzer_corpus/837db5272d730107ae362fcd3cb2c21e5f1ea53e
new file mode 100644
index 0000000000..53d45b5aa5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/837db5272d730107ae362fcd3cb2c21e5f1ea53e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/83a2a19743bb77278aba8cce1d04529d2cb0a744 b/test/core/end2end/fuzzers/api_fuzzer_corpus/83a2a19743bb77278aba8cce1d04529d2cb0a744
new file mode 100644
index 0000000000..3bf333b82b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/83a2a19743bb77278aba8cce1d04529d2cb0a744
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/853a546c5435e9eb9f2d13898755abeaf93d51b1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/853a546c5435e9eb9f2d13898755abeaf93d51b1
new file mode 100644
index 0000000000..6464ace91f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/853a546c5435e9eb9f2d13898755abeaf93d51b1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8644486ad9579f43b8c6f34b423c2c1159b20a9a b/test/core/end2end/fuzzers/api_fuzzer_corpus/8644486ad9579f43b8c6f34b423c2c1159b20a9a
new file mode 100644
index 0000000000..2bc1290ab6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8644486ad9579f43b8c6f34b423c2c1159b20a9a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/86906b52f5fdad0955f5a93dd26ff420e4a58078 b/test/core/end2end/fuzzers/api_fuzzer_corpus/86906b52f5fdad0955f5a93dd26ff420e4a58078
new file mode 100644
index 0000000000..17b1b02f69
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/86906b52f5fdad0955f5a93dd26ff420e4a58078
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/87a300cd25d2e57745bd00499d4d2352a10a2fa1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a300cd25d2e57745bd00499d4d2352a10a2fa1
new file mode 100644
index 0000000000..c8f79862bc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a300cd25d2e57745bd00499d4d2352a10a2fa1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/87a34188d51bc8b43bd7d9097958097e70154960 b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a34188d51bc8b43bd7d9097958097e70154960
new file mode 100644
index 0000000000..a90fb52338
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a34188d51bc8b43bd7d9097958097e70154960
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/87a4605e106399e71e689468a23ba11e7f17de2b b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a4605e106399e71e689468a23ba11e7f17de2b
new file mode 100644
index 0000000000..c9a66bd9f6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/87a4605e106399e71e689468a23ba11e7f17de2b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/89cdf2f9a9682277284c24819a0cd336bbb04d60 b/test/core/end2end/fuzzers/api_fuzzer_corpus/89cdf2f9a9682277284c24819a0cd336bbb04d60
new file mode 100644
index 0000000000..9501a65404
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/89cdf2f9a9682277284c24819a0cd336bbb04d60
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8a1c629910280f8beebb88687696de98da988ecc b/test/core/end2end/fuzzers/api_fuzzer_corpus/8a1c629910280f8beebb88687696de98da988ecc
new file mode 100644
index 0000000000..ce3377fdc1
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8a1c629910280f8beebb88687696de98da988ecc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8adec341bcbd14fb0bee52926141a4a5b3a885e2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8adec341bcbd14fb0bee52926141a4a5b3a885e2
new file mode 100644
index 0000000000..270c4babd8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8adec341bcbd14fb0bee52926141a4a5b3a885e2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8b43d6ab6c1034fba9757ce801e237da089f1898 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8b43d6ab6c1034fba9757ce801e237da089f1898
new file mode 100644
index 0000000000..782654efba
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8b43d6ab6c1034fba9757ce801e237da089f1898
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8c00268431d8fb83ee306f0a49bee4af8728c0b0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8c00268431d8fb83ee306f0a49bee4af8728c0b0
new file mode 100644
index 0000000000..95211f0f25
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8c00268431d8fb83ee306f0a49bee4af8728c0b0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8c5d9191880e9753a747e7ccd7824483bcd7568a b/test/core/end2end/fuzzers/api_fuzzer_corpus/8c5d9191880e9753a747e7ccd7824483bcd7568a
new file mode 100644
index 0000000000..de4f90e72f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8c5d9191880e9753a747e7ccd7824483bcd7568a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8cbb67da0e40816cf4bedf4fa6ce176563fc0487 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8cbb67da0e40816cf4bedf4fa6ce176563fc0487
new file mode 100644
index 0000000000..aaded62452
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8cbb67da0e40816cf4bedf4fa6ce176563fc0487
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8d54be1edc097b319d26ee1a08b1da06bafd0bbc b/test/core/end2end/fuzzers/api_fuzzer_corpus/8d54be1edc097b319d26ee1a08b1da06bafd0bbc
new file mode 100644
index 0000000000..020792a956
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8d54be1edc097b319d26ee1a08b1da06bafd0bbc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8dfdb04ef558fba84dcbfa65a6aa318b10988fa9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8dfdb04ef558fba84dcbfa65a6aa318b10988fa9
new file mode 100644
index 0000000000..7e71dc66d4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8dfdb04ef558fba84dcbfa65a6aa318b10988fa9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8e49b880f6e9514963c8f82bc6c7131ab104200f b/test/core/end2end/fuzzers/api_fuzzer_corpus/8e49b880f6e9514963c8f82bc6c7131ab104200f
new file mode 100644
index 0000000000..944d3e76a7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8e49b880f6e9514963c8f82bc6c7131ab104200f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8e6332b7d5234f6a1a153f91131ea33f0a5535d8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8e6332b7d5234f6a1a153f91131ea33f0a5535d8
new file mode 100644
index 0000000000..c790e8c799
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8e6332b7d5234f6a1a153f91131ea33f0a5535d8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8ea9969bced02fd855c7de7edb12f074226f6dab b/test/core/end2end/fuzzers/api_fuzzer_corpus/8ea9969bced02fd855c7de7edb12f074226f6dab
new file mode 100644
index 0000000000..531ba64f2e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8ea9969bced02fd855c7de7edb12f074226f6dab
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8efa9ad7c934a3c3cc01470ee1c21d7063f7b209 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8efa9ad7c934a3c3cc01470ee1c21d7063f7b209
new file mode 100644
index 0000000000..c2dcd010c0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8efa9ad7c934a3c3cc01470ee1c21d7063f7b209
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8f332e450d6a489fed2627f387cf0d0db7bacd37 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f332e450d6a489fed2627f387cf0d0db7bacd37
new file mode 100644
index 0000000000..740dd57a72
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f332e450d6a489fed2627f387cf0d0db7bacd37
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8f71f51eba1aba1d839b19801c594eab968a892e b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f71f51eba1aba1d839b19801c594eab968a892e
new file mode 100644
index 0000000000..ef4b4e1a15
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f71f51eba1aba1d839b19801c594eab968a892e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8f840f0a04cce56098d395939b446589ee67da0c b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f840f0a04cce56098d395939b446589ee67da0c
new file mode 100644
index 0000000000..d72b78c939
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8f840f0a04cce56098d395939b446589ee67da0c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8fba35a2ec8e2eb182eeacd23592c92932c64200 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8fba35a2ec8e2eb182eeacd23592c92932c64200
new file mode 100644
index 0000000000..351f16a946
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8fba35a2ec8e2eb182eeacd23592c92932c64200
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/8ff7b1568d2da2e4196c2e28617e1911d62021e6 b/test/core/end2end/fuzzers/api_fuzzer_corpus/8ff7b1568d2da2e4196c2e28617e1911d62021e6
new file mode 100644
index 0000000000..321520b870
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/8ff7b1568d2da2e4196c2e28617e1911d62021e6
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/902ad49db6c0518017e8438d1ee61e0841fda6e7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/902ad49db6c0518017e8438d1ee61e0841fda6e7
new file mode 100644
index 0000000000..586cd39a23
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/902ad49db6c0518017e8438d1ee61e0841fda6e7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/91236da3b95886937ab487700d8c72b40e6b9477 b/test/core/end2end/fuzzers/api_fuzzer_corpus/91236da3b95886937ab487700d8c72b40e6b9477
new file mode 100644
index 0000000000..da27462e8a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/91236da3b95886937ab487700d8c72b40e6b9477
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/91491f410776eb726c8a5face925c703737ed916 b/test/core/end2end/fuzzers/api_fuzzer_corpus/91491f410776eb726c8a5face925c703737ed916
new file mode 100644
index 0000000000..5adc9504b0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/91491f410776eb726c8a5face925c703737ed916
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/91980bd25cd4827c2e0c9ebb028d03ef226d0e73 b/test/core/end2end/fuzzers/api_fuzzer_corpus/91980bd25cd4827c2e0c9ebb028d03ef226d0e73
new file mode 100644
index 0000000000..8510caabe2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/91980bd25cd4827c2e0c9ebb028d03ef226d0e73
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/92c816d98f9f8669f43b46b22d5da21464d9ef41 b/test/core/end2end/fuzzers/api_fuzzer_corpus/92c816d98f9f8669f43b46b22d5da21464d9ef41
new file mode 100644
index 0000000000..c000647a86
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/92c816d98f9f8669f43b46b22d5da21464d9ef41
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/939a61533db8868591c514fc41c7dfb4232e3e4f b/test/core/end2end/fuzzers/api_fuzzer_corpus/939a61533db8868591c514fc41c7dfb4232e3e4f
new file mode 100644
index 0000000000..c21081b541
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/939a61533db8868591c514fc41c7dfb4232e3e4f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/943924f902d02a4358ba2ae693087033d30e862b b/test/core/end2end/fuzzers/api_fuzzer_corpus/943924f902d02a4358ba2ae693087033d30e862b
new file mode 100644
index 0000000000..c879d782a4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/943924f902d02a4358ba2ae693087033d30e862b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/946f3ee9686789790301935574f412b9cf5cdeec b/test/core/end2end/fuzzers/api_fuzzer_corpus/946f3ee9686789790301935574f412b9cf5cdeec
new file mode 100644
index 0000000000..a627547b9a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/946f3ee9686789790301935574f412b9cf5cdeec
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/958d48d95d2c2ff8b177ebd2149b9d9a89908f48 b/test/core/end2end/fuzzers/api_fuzzer_corpus/958d48d95d2c2ff8b177ebd2149b9d9a89908f48
new file mode 100644
index 0000000000..14d8c6a492
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/958d48d95d2c2ff8b177ebd2149b9d9a89908f48
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/95e73caecc0ab06beaa9b84125adcb2e6eee2eff b/test/core/end2end/fuzzers/api_fuzzer_corpus/95e73caecc0ab06beaa9b84125adcb2e6eee2eff
new file mode 100644
index 0000000000..67fecc095d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/95e73caecc0ab06beaa9b84125adcb2e6eee2eff
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9625913195b7d7a5337016e8f9a29c8f3d6ad435 b/test/core/end2end/fuzzers/api_fuzzer_corpus/9625913195b7d7a5337016e8f9a29c8f3d6ad435
new file mode 100644
index 0000000000..26233fc403
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9625913195b7d7a5337016e8f9a29c8f3d6ad435
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/963c2fa0d8197bb8b6c7bbfcb43a9ae1ec29f2c7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/963c2fa0d8197bb8b6c7bbfcb43a9ae1ec29f2c7
new file mode 100644
index 0000000000..3420d46065
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/963c2fa0d8197bb8b6c7bbfcb43a9ae1ec29f2c7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/973f74081ad8c1d91ad1b0bfc10061de72d1b1bc b/test/core/end2end/fuzzers/api_fuzzer_corpus/973f74081ad8c1d91ad1b0bfc10061de72d1b1bc
new file mode 100644
index 0000000000..ae0e4e378f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/973f74081ad8c1d91ad1b0bfc10061de72d1b1bc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/974be67fe5188cfa77f7db943dfdaa0a4a2c4e82 b/test/core/end2end/fuzzers/api_fuzzer_corpus/974be67fe5188cfa77f7db943dfdaa0a4a2c4e82
new file mode 100644
index 0000000000..c6f1c5a8d7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/974be67fe5188cfa77f7db943dfdaa0a4a2c4e82
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/976ed70e538943fc60d5b339528c70a69161d6a1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/976ed70e538943fc60d5b339528c70a69161d6a1
new file mode 100644
index 0000000000..21c265de57
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/976ed70e538943fc60d5b339528c70a69161d6a1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/97b87b4a9d1846c2f2277f7291c545be955257e3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/97b87b4a9d1846c2f2277f7291c545be955257e3
new file mode 100644
index 0000000000..90c4026f1e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/97b87b4a9d1846c2f2277f7291c545be955257e3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/97d261c920f2802c97343e07847c98afa3ff46a3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/97d261c920f2802c97343e07847c98afa3ff46a3
new file mode 100644
index 0000000000..2861755d6d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/97d261c920f2802c97343e07847c98afa3ff46a3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/97f7a51a0bb869d09f9f1bd7a4f93c5d859c89eb b/test/core/end2end/fuzzers/api_fuzzer_corpus/97f7a51a0bb869d09f9f1bd7a4f93c5d859c89eb
new file mode 100644
index 0000000000..1bb271fbb1
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/97f7a51a0bb869d09f9f1bd7a4f93c5d859c89eb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/982f375b183d984958667461c7767206062eb4cb b/test/core/end2end/fuzzers/api_fuzzer_corpus/982f375b183d984958667461c7767206062eb4cb
new file mode 100644
index 0000000000..01d07d6408
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/982f375b183d984958667461c7767206062eb4cb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/98739af631223fa05ad88f1e63a52052a9bb4b1c b/test/core/end2end/fuzzers/api_fuzzer_corpus/98739af631223fa05ad88f1e63a52052a9bb4b1c
new file mode 100644
index 0000000000..a4adb7aee6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/98739af631223fa05ad88f1e63a52052a9bb4b1c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/98a661d328f1ad6277c802604126d91965d6fda8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/98a661d328f1ad6277c802604126d91965d6fda8
new file mode 100644
index 0000000000..ee68d203dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/98a661d328f1ad6277c802604126d91965d6fda8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9916b65305d28acf75a17495b9f44d7b839b948f b/test/core/end2end/fuzzers/api_fuzzer_corpus/9916b65305d28acf75a17495b9f44d7b839b948f
new file mode 100644
index 0000000000..40a6dacd7d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9916b65305d28acf75a17495b9f44d7b839b948f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/99789b6e9a0932dc95b686cf380872175603918f b/test/core/end2end/fuzzers/api_fuzzer_corpus/99789b6e9a0932dc95b686cf380872175603918f
new file mode 100644
index 0000000000..fe02035525
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/99789b6e9a0932dc95b686cf380872175603918f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/99bb7db7244a6cb2bc0e6c275739f051f83b335a b/test/core/end2end/fuzzers/api_fuzzer_corpus/99bb7db7244a6cb2bc0e6c275739f051f83b335a
new file mode 100644
index 0000000000..c14b6d8e45
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/99bb7db7244a6cb2bc0e6c275739f051f83b335a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9b922c2b47217bbc8c91fce66fc666d626cee86a b/test/core/end2end/fuzzers/api_fuzzer_corpus/9b922c2b47217bbc8c91fce66fc666d626cee86a
new file mode 100644
index 0000000000..1295369cb7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9b922c2b47217bbc8c91fce66fc666d626cee86a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9c052499ada417d5038f8cc7da62e6acae9ba9ae b/test/core/end2end/fuzzers/api_fuzzer_corpus/9c052499ada417d5038f8cc7da62e6acae9ba9ae
new file mode 100644
index 0000000000..ccee196ca3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9c052499ada417d5038f8cc7da62e6acae9ba9ae
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9c78f9e53f09be45b2dac44dc8452880e7bed04b b/test/core/end2end/fuzzers/api_fuzzer_corpus/9c78f9e53f09be45b2dac44dc8452880e7bed04b
new file mode 100644
index 0000000000..ae93ae8e84
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9c78f9e53f09be45b2dac44dc8452880e7bed04b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9ca8f5c67662fa6726db2680978e443d80785a9f b/test/core/end2end/fuzzers/api_fuzzer_corpus/9ca8f5c67662fa6726db2680978e443d80785a9f
new file mode 100644
index 0000000000..4954b7255c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9ca8f5c67662fa6726db2680978e443d80785a9f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9cc4eeecbb2df8b130cca5e455a0f6b8a6e00660 b/test/core/end2end/fuzzers/api_fuzzer_corpus/9cc4eeecbb2df8b130cca5e455a0f6b8a6e00660
new file mode 100644
index 0000000000..86f991ed00
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9cc4eeecbb2df8b130cca5e455a0f6b8a6e00660
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9d43466b9c4b8736cde82e337d9a9f881db82d11 b/test/core/end2end/fuzzers/api_fuzzer_corpus/9d43466b9c4b8736cde82e337d9a9f881db82d11
new file mode 100644
index 0000000000..065698222e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9d43466b9c4b8736cde82e337d9a9f881db82d11
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9d5d9a28271a6d21850feb249cfe27aa0a31130c b/test/core/end2end/fuzzers/api_fuzzer_corpus/9d5d9a28271a6d21850feb249cfe27aa0a31130c
new file mode 100644
index 0000000000..c99b47eeae
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9d5d9a28271a6d21850feb249cfe27aa0a31130c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9e273a94bf3c60f1c7875874c81d0b9309428752 b/test/core/end2end/fuzzers/api_fuzzer_corpus/9e273a94bf3c60f1c7875874c81d0b9309428752
new file mode 100644
index 0000000000..8c91bb1f0d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9e273a94bf3c60f1c7875874c81d0b9309428752
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/9f1c4ea38c9fb86a62693f202b26b1be3c7b2d37 b/test/core/end2end/fuzzers/api_fuzzer_corpus/9f1c4ea38c9fb86a62693f202b26b1be3c7b2d37
new file mode 100644
index 0000000000..8f11fb518f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/9f1c4ea38c9fb86a62693f202b26b1be3c7b2d37
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a1f59f79257ae56e6e6039d3fe838ca050f40385 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a1f59f79257ae56e6e6039d3fe838ca050f40385
new file mode 100644
index 0000000000..79bc6c9469
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a1f59f79257ae56e6e6039d3fe838ca050f40385
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a2180525f267c6d6b8f7501b100b97aef0d87f83 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a2180525f267c6d6b8f7501b100b97aef0d87f83
new file mode 100644
index 0000000000..4a6f0c64b5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a2180525f267c6d6b8f7501b100b97aef0d87f83
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a270e4304cc0dcd2c67b78c0495dedb10419f0af b/test/core/end2end/fuzzers/api_fuzzer_corpus/a270e4304cc0dcd2c67b78c0495dedb10419f0af
new file mode 100644
index 0000000000..733f4cc62a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a270e4304cc0dcd2c67b78c0495dedb10419f0af
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a2d2b12575edfb559872c4f2ce63e95fdf68b774 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a2d2b12575edfb559872c4f2ce63e95fdf68b774
new file mode 100644
index 0000000000..b948759f44
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a2d2b12575edfb559872c4f2ce63e95fdf68b774
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a31a10de37eda6db8ecc2270b6a368985a38a44b b/test/core/end2end/fuzzers/api_fuzzer_corpus/a31a10de37eda6db8ecc2270b6a368985a38a44b
new file mode 100644
index 0000000000..3df44fd224
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a31a10de37eda6db8ecc2270b6a368985a38a44b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a4da7f4642cfaf355445834075d3b4d04cf8b218 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a4da7f4642cfaf355445834075d3b4d04cf8b218
new file mode 100644
index 0000000000..5c306ad98f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a4da7f4642cfaf355445834075d3b4d04cf8b218
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a5be9b0f094ec76d5f082f4e06dafb5a01c066c1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a5be9b0f094ec76d5f082f4e06dafb5a01c066c1
new file mode 100644
index 0000000000..e64aae2e01
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a5be9b0f094ec76d5f082f4e06dafb5a01c066c1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a62651154d1e5c33e154ea4b57f042be89feed9c b/test/core/end2end/fuzzers/api_fuzzer_corpus/a62651154d1e5c33e154ea4b57f042be89feed9c
new file mode 100644
index 0000000000..56535f1ef5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a62651154d1e5c33e154ea4b57f042be89feed9c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a65bda38b60ae084a5dcc3b616660aa338feef17 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a65bda38b60ae084a5dcc3b616660aa338feef17
new file mode 100644
index 0000000000..cd7537592c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a65bda38b60ae084a5dcc3b616660aa338feef17
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a6a11f05565197ecb9cbf3a2ddf826564b425e74 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a6a11f05565197ecb9cbf3a2ddf826564b425e74
new file mode 100644
index 0000000000..2203ea0268
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a6a11f05565197ecb9cbf3a2ddf826564b425e74
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a71ab47d9ad32e10acc8b9772a331cae045fb424 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a71ab47d9ad32e10acc8b9772a331cae045fb424
new file mode 100644
index 0000000000..0dd072b2f5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a71ab47d9ad32e10acc8b9772a331cae045fb424
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a78bca1ef8829d720dd5dedac3a9d4d12684da34 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a78bca1ef8829d720dd5dedac3a9d4d12684da34
new file mode 100644
index 0000000000..322d4ae019
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a78bca1ef8829d720dd5dedac3a9d4d12684da34
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a881a2dcd16f595644c1543ccf047b7ae5bb7fa4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a881a2dcd16f595644c1543ccf047b7ae5bb7fa4
new file mode 100644
index 0000000000..cd6c17b10b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a881a2dcd16f595644c1543ccf047b7ae5bb7fa4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a8c0a166004ee637f22f5838960c8f4320738694 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a8c0a166004ee637f22f5838960c8f4320738694
new file mode 100644
index 0000000000..c654a53fcb
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a8c0a166004ee637f22f5838960c8f4320738694
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/a9e6f164e912d8964ae28f383dca6d980dcd4b94 b/test/core/end2end/fuzzers/api_fuzzer_corpus/a9e6f164e912d8964ae28f383dca6d980dcd4b94
new file mode 100644
index 0000000000..121daf9a6c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/a9e6f164e912d8964ae28f383dca6d980dcd4b94
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa05527f894960d22773d0e1c96e8ad9293e3910 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa05527f894960d22773d0e1c96e8ad9293e3910
new file mode 100644
index 0000000000..6362b42992
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa05527f894960d22773d0e1c96e8ad9293e3910
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa103991d1d90adf0af592c050c1d39532690f73 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa103991d1d90adf0af592c050c1d39532690f73
new file mode 100644
index 0000000000..abf072f382
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa103991d1d90adf0af592c050c1d39532690f73
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa26dbb6bb031702e07e82a70162de89e31dbb60 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa26dbb6bb031702e07e82a70162de89e31dbb60
new file mode 100644
index 0000000000..e5a844355d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa26dbb6bb031702e07e82a70162de89e31dbb60
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa2b2a1240b9ddfba14035695084096f93a4eea5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa2b2a1240b9ddfba14035695084096f93a4eea5
new file mode 100644
index 0000000000..ba0fbcea36
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa2b2a1240b9ddfba14035695084096f93a4eea5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa58c60840b27f80a9779d2f4fc76154e12b7dc5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa58c60840b27f80a9779d2f4fc76154e12b7dc5
new file mode 100644
index 0000000000..6dafb63709
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa58c60840b27f80a9779d2f4fc76154e12b7dc5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa682b09b1e785fe0ed7edc6b14a4e8e5282e043 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa682b09b1e785fe0ed7edc6b14a4e8e5282e043
new file mode 100644
index 0000000000..28028a3bbe
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa682b09b1e785fe0ed7edc6b14a4e8e5282e043
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aa7e9b09e36bec073300d107795b7dc63eafbeb9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa7e9b09e36bec073300d107795b7dc63eafbeb9
new file mode 100644
index 0000000000..2209278cb9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aa7e9b09e36bec073300d107795b7dc63eafbeb9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/abd5de7b5e9218d19a57c47d2ccd6a1bc022c7fb b/test/core/end2end/fuzzers/api_fuzzer_corpus/abd5de7b5e9218d19a57c47d2ccd6a1bc022c7fb
new file mode 100644
index 0000000000..5d8ebd3c76
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/abd5de7b5e9218d19a57c47d2ccd6a1bc022c7fb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ac763d89466ebfad676e75be0076831c03fe2a5d b/test/core/end2end/fuzzers/api_fuzzer_corpus/ac763d89466ebfad676e75be0076831c03fe2a5d
new file mode 100644
index 0000000000..64c9720c9b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ac763d89466ebfad676e75be0076831c03fe2a5d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/acb33ec3207ddd5f641f8f989faa888bcc70385c b/test/core/end2end/fuzzers/api_fuzzer_corpus/acb33ec3207ddd5f641f8f989faa888bcc70385c
new file mode 100644
index 0000000000..4d14b561ff
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/acb33ec3207ddd5f641f8f989faa888bcc70385c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/adc78556e789c046d7f82b77e967a9e7fdf6cdac b/test/core/end2end/fuzzers/api_fuzzer_corpus/adc78556e789c046d7f82b77e967a9e7fdf6cdac
new file mode 100644
index 0000000000..1934f3b981
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/adc78556e789c046d7f82b77e967a9e7fdf6cdac
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/adf88d50a752961142e1a3fc4eeba380e6089a5f b/test/core/end2end/fuzzers/api_fuzzer_corpus/adf88d50a752961142e1a3fc4eeba380e6089a5f
new file mode 100644
index 0000000000..74f1f0c31a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/adf88d50a752961142e1a3fc4eeba380e6089a5f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/aed35edde0a0395829c43b45a34f537b9c6fc23a b/test/core/end2end/fuzzers/api_fuzzer_corpus/aed35edde0a0395829c43b45a34f537b9c6fc23a
new file mode 100644
index 0000000000..1592e17701
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/aed35edde0a0395829c43b45a34f537b9c6fc23a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/af9d0bbc10db557c0ef9ab55a6f217b4f76a87db b/test/core/end2end/fuzzers/api_fuzzer_corpus/af9d0bbc10db557c0ef9ab55a6f217b4f76a87db
new file mode 100644
index 0000000000..de43084835
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/af9d0bbc10db557c0ef9ab55a6f217b4f76a87db
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b09e64aa807db006a219bd1b9faf1a2e00dc6d33 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b09e64aa807db006a219bd1b9faf1a2e00dc6d33
new file mode 100644
index 0000000000..50548fa35d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b09e64aa807db006a219bd1b9faf1a2e00dc6d33
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b0c9bc430c79f064b61d8cad076b072c9c014804 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b0c9bc430c79f064b61d8cad076b072c9c014804
new file mode 100644
index 0000000000..3b751711e7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b0c9bc430c79f064b61d8cad076b072c9c014804
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b165523f699e6ae9b2ad15873b9d56465d1af546 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b165523f699e6ae9b2ad15873b9d56465d1af546
new file mode 100644
index 0000000000..b0b7452924
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b165523f699e6ae9b2ad15873b9d56465d1af546
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b233e6287f4208a2ae8f89fe25caf0a33b7b4e51 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b233e6287f4208a2ae8f89fe25caf0a33b7b4e51
new file mode 100644
index 0000000000..6ff2926ccf
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b233e6287f4208a2ae8f89fe25caf0a33b7b4e51
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b2a5ec3ef40c68d594638218e3c943a479f82215 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b2a5ec3ef40c68d594638218e3c943a479f82215
new file mode 100644
index 0000000000..ac2b154407
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b2a5ec3ef40c68d594638218e3c943a479f82215
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b36c3e5841c6aed7b0d439bd3b9c6d922d56c70b b/test/core/end2end/fuzzers/api_fuzzer_corpus/b36c3e5841c6aed7b0d439bd3b9c6d922d56c70b
new file mode 100644
index 0000000000..4c5fc29e71
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b36c3e5841c6aed7b0d439bd3b9c6d922d56c70b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b39f27387a256019038cddb91f65651c01afb825 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b39f27387a256019038cddb91f65651c01afb825
new file mode 100644
index 0000000000..a1e335bd01
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b39f27387a256019038cddb91f65651c01afb825
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b4b0f04d9a771ea9575d9cc484947fcadf4ef5bd b/test/core/end2end/fuzzers/api_fuzzer_corpus/b4b0f04d9a771ea9575d9cc484947fcadf4ef5bd
new file mode 100644
index 0000000000..02e99acac8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b4b0f04d9a771ea9575d9cc484947fcadf4ef5bd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b501cbf4c085ce0b75e4031810bf99f91905fb06 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b501cbf4c085ce0b75e4031810bf99f91905fb06
new file mode 100644
index 0000000000..6c4e46a26f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b501cbf4c085ce0b75e4031810bf99f91905fb06
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b53a90f0ad5e8026e0354e149ed8b4782fda00ad b/test/core/end2end/fuzzers/api_fuzzer_corpus/b53a90f0ad5e8026e0354e149ed8b4782fda00ad
new file mode 100644
index 0000000000..59ba6f05ab
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b53a90f0ad5e8026e0354e149ed8b4782fda00ad
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b55d66dbf3f2b795062e5a53379c2f63cab17062 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b55d66dbf3f2b795062e5a53379c2f63cab17062
new file mode 100644
index 0000000000..c0464c3f20
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b55d66dbf3f2b795062e5a53379c2f63cab17062
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b6f721156f8dc6a353555929e459e61bab8b394a b/test/core/end2end/fuzzers/api_fuzzer_corpus/b6f721156f8dc6a353555929e459e61bab8b394a
new file mode 100644
index 0000000000..43986eae54
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b6f721156f8dc6a353555929e459e61bab8b394a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b8845fbdf002c64053d7fa3e60add56f0a030992 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b8845fbdf002c64053d7fa3e60add56f0a030992
new file mode 100644
index 0000000000..b6823a113a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b8845fbdf002c64053d7fa3e60add56f0a030992
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b88619bb22a3b2585cad3ace194fcdd8c6b63104 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b88619bb22a3b2585cad3ace194fcdd8c6b63104
new file mode 100644
index 0000000000..903049d9a9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b88619bb22a3b2585cad3ace194fcdd8c6b63104
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b8bc377e53ca54ae4e30f437b69e270040c35f65 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b8bc377e53ca54ae4e30f437b69e270040c35f65
new file mode 100644
index 0000000000..44934bbb99
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b8bc377e53ca54ae4e30f437b69e270040c35f65
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b92b1c5e0dba009a9516e7185f5df019c62c5cc9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b92b1c5e0dba009a9516e7185f5df019c62c5cc9
new file mode 100644
index 0000000000..3d542f38ec
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b92b1c5e0dba009a9516e7185f5df019c62c5cc9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b94e1db2cd1236075bb8772b72c64991d442e584 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b94e1db2cd1236075bb8772b72c64991d442e584
new file mode 100644
index 0000000000..154e8b8d5f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b94e1db2cd1236075bb8772b72c64991d442e584
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b9a7faa77ddf3a7e206e4d06f5d9d8de7d9c7df8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b9a7faa77ddf3a7e206e4d06f5d9d8de7d9c7df8
new file mode 100644
index 0000000000..e17d915c54
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b9a7faa77ddf3a7e206e4d06f5d9d8de7d9c7df8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/b9d799eb148e4d8a8a235e385ca8302a8acc3896 b/test/core/end2end/fuzzers/api_fuzzer_corpus/b9d799eb148e4d8a8a235e385ca8302a8acc3896
new file mode 100644
index 0000000000..fb5a09d134
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/b9d799eb148e4d8a8a235e385ca8302a8acc3896
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/baee7b89cd2017f450c37137628688f25979b3bb b/test/core/end2end/fuzzers/api_fuzzer_corpus/baee7b89cd2017f450c37137628688f25979b3bb
new file mode 100644
index 0000000000..aea662cd91
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/baee7b89cd2017f450c37137628688f25979b3bb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/baf7b33805daf027e037e406d3442b3444108ac0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/baf7b33805daf027e037e406d3442b3444108ac0
new file mode 100644
index 0000000000..230c450902
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/baf7b33805daf027e037e406d3442b3444108ac0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bb426bb115461f351e57f64c0378e331f74ed5fc b/test/core/end2end/fuzzers/api_fuzzer_corpus/bb426bb115461f351e57f64c0378e331f74ed5fc
new file mode 100644
index 0000000000..12c6be1a45
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bb426bb115461f351e57f64c0378e331f74ed5fc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bbb2429766a7c4ef9cb7110d567fd48cd6507dc5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bbb2429766a7c4ef9cb7110d567fd48cd6507dc5
new file mode 100644
index 0000000000..017a4775f8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bbb2429766a7c4ef9cb7110d567fd48cd6507dc5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bc330aa616a792ff22a8c7428dcdb4d99accbe4b b/test/core/end2end/fuzzers/api_fuzzer_corpus/bc330aa616a792ff22a8c7428dcdb4d99accbe4b
new file mode 100644
index 0000000000..a046eae7b3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bc330aa616a792ff22a8c7428dcdb4d99accbe4b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bc42e00a7d67fb68df3cb5893908c04884b6ad5e b/test/core/end2end/fuzzers/api_fuzzer_corpus/bc42e00a7d67fb68df3cb5893908c04884b6ad5e
new file mode 100644
index 0000000000..af4a3481d8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bc42e00a7d67fb68df3cb5893908c04884b6ad5e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bcc655cbb7334db02fc7fe9d29bd49fd6ee4ee91 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bcc655cbb7334db02fc7fe9d29bd49fd6ee4ee91
new file mode 100644
index 0000000000..7d914ef5ea
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bcc655cbb7334db02fc7fe9d29bd49fd6ee4ee91
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bd4f7f4d43ceaec0429ddc248cd438284813cc64 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bd4f7f4d43ceaec0429ddc248cd438284813cc64
new file mode 100644
index 0000000000..f5098854fb
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bd4f7f4d43ceaec0429ddc248cd438284813cc64
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bed4e119b86e8dd0a6c60cb96cc2f9e66d0a8857 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bed4e119b86e8dd0a6c60cb96cc2f9e66d0a8857
new file mode 100644
index 0000000000..ad1a13706c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bed4e119b86e8dd0a6c60cb96cc2f9e66d0a8857
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bfafd0d497ccd035d6ef1478509c93a9d2443513 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bfafd0d497ccd035d6ef1478509c93a9d2443513
new file mode 100644
index 0000000000..579f28c1ac
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bfafd0d497ccd035d6ef1478509c93a9d2443513
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/bfb3ae60341e80c10de105fa0f9a01f134033225 b/test/core/end2end/fuzzers/api_fuzzer_corpus/bfb3ae60341e80c10de105fa0f9a01f134033225
new file mode 100644
index 0000000000..c5fdc4cf40
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/bfb3ae60341e80c10de105fa0f9a01f134033225
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c1e5524945b3e3eabedfbb675be9e9ea99a36b94 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c1e5524945b3e3eabedfbb675be9e9ea99a36b94
new file mode 100644
index 0000000000..12bb8f2d64
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c1e5524945b3e3eabedfbb675be9e9ea99a36b94
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c29f3256e632a713aeb3ef647fff014a9be01a8d b/test/core/end2end/fuzzers/api_fuzzer_corpus/c29f3256e632a713aeb3ef647fff014a9be01a8d
new file mode 100644
index 0000000000..000e18c44b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c29f3256e632a713aeb3ef647fff014a9be01a8d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c41f43520da236f84dd0e2157644d316ca6fac37 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c41f43520da236f84dd0e2157644d316ca6fac37
new file mode 100644
index 0000000000..17026cce93
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c41f43520da236f84dd0e2157644d316ca6fac37
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c5535d6d801d315d78792c9956a82711d0d5a803 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c5535d6d801d315d78792c9956a82711d0d5a803
new file mode 100644
index 0000000000..1f779a6356
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c5535d6d801d315d78792c9956a82711d0d5a803
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c5cd7af16e7bc0049445d5a0b92a3d4b7e5e3533 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c5cd7af16e7bc0049445d5a0b92a3d4b7e5e3533
new file mode 100644
index 0000000000..c8fca17ad3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c5cd7af16e7bc0049445d5a0b92a3d4b7e5e3533
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c6ec8562082eda6ea9ae1cc27f33b920b93589e4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c6ec8562082eda6ea9ae1cc27f33b920b93589e4
new file mode 100644
index 0000000000..1b8ebd047b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c6ec8562082eda6ea9ae1cc27f33b920b93589e4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c6f9e7ce30494ccbf3a1f49bed7107d976e3cc4e b/test/core/end2end/fuzzers/api_fuzzer_corpus/c6f9e7ce30494ccbf3a1f49bed7107d976e3cc4e
new file mode 100644
index 0000000000..0091fd27d3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c6f9e7ce30494ccbf3a1f49bed7107d976e3cc4e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c71747c667c94062a03ec0f0468212e7ac222c57 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c71747c667c94062a03ec0f0468212e7ac222c57
new file mode 100644
index 0000000000..cde0a42fa3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c71747c667c94062a03ec0f0468212e7ac222c57
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c767f1416feb8d7a2899ab276a4846e10f59531c b/test/core/end2end/fuzzers/api_fuzzer_corpus/c767f1416feb8d7a2899ab276a4846e10f59531c
new file mode 100644
index 0000000000..7c1932f552
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c767f1416feb8d7a2899ab276a4846e10f59531c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c8b448134c9d165968599402c9633719573afd8d b/test/core/end2end/fuzzers/api_fuzzer_corpus/c8b448134c9d165968599402c9633719573afd8d
new file mode 100644
index 0000000000..c13b0965b6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c8b448134c9d165968599402c9633719573afd8d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c955c8f169185554e8e1d45ded89db29c3164917 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c955c8f169185554e8e1d45ded89db29c3164917
new file mode 100644
index 0000000000..0eb3d9c1f5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c955c8f169185554e8e1d45ded89db29c3164917
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/c9f81864507c264369dd22c72aeb16f1cb1742b0 b/test/core/end2end/fuzzers/api_fuzzer_corpus/c9f81864507c264369dd22c72aeb16f1cb1742b0
new file mode 100644
index 0000000000..0331bad1a6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/c9f81864507c264369dd22c72aeb16f1cb1742b0
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/cb4f23427bca81db8ccf5f03bdb0c60418a20a74 b/test/core/end2end/fuzzers/api_fuzzer_corpus/cb4f23427bca81db8ccf5f03bdb0c60418a20a74
new file mode 100644
index 0000000000..39eb594be2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/cb4f23427bca81db8ccf5f03bdb0c60418a20a74
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/cce1a22e2c3532ddb85af19d2f17cc7a11ca1050 b/test/core/end2end/fuzzers/api_fuzzer_corpus/cce1a22e2c3532ddb85af19d2f17cc7a11ca1050
new file mode 100644
index 0000000000..f2685ffe9c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/cce1a22e2c3532ddb85af19d2f17cc7a11ca1050
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/cd2b1fed5910041aca30e39210ee21d4ebb80469 b/test/core/end2end/fuzzers/api_fuzzer_corpus/cd2b1fed5910041aca30e39210ee21d4ebb80469
new file mode 100644
index 0000000000..92e009a4dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/cd2b1fed5910041aca30e39210ee21d4ebb80469
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/cd4ccfa79f65f31716296e690f3a76007edde2e3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/cd4ccfa79f65f31716296e690f3a76007edde2e3
new file mode 100644
index 0000000000..2a19daf6c7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/cd4ccfa79f65f31716296e690f3a76007edde2e3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ce4a157481d32f9c2ec106f257278d3159e6bd21 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ce4a157481d32f9c2ec106f257278d3159e6bd21
new file mode 100644
index 0000000000..dc0a837819
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ce4a157481d32f9c2ec106f257278d3159e6bd21
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ceb98039ba87c5c326c904f275490b25c7d90f1c b/test/core/end2end/fuzzers/api_fuzzer_corpus/ceb98039ba87c5c326c904f275490b25c7d90f1c
new file mode 100644
index 0000000000..e6ac3a837a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ceb98039ba87c5c326c904f275490b25c7d90f1c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/cee29e303670fdd259d375da8345d6e49ba971b4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/cee29e303670fdd259d375da8345d6e49ba971b4
new file mode 100644
index 0000000000..246dec486a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/cee29e303670fdd259d375da8345d6e49ba971b4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-177af631195e806f4056847cea4d09b5eb28cf8a b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-177af631195e806f4056847cea4d09b5eb28cf8a
new file mode 100644
index 0000000000..344825c571
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-177af631195e806f4056847cea4d09b5eb28cf8a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-373224be81ff98db60e9f81536f16a9ef92792d5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-373224be81ff98db60e9f81536f16a9ef92792d5
new file mode 100644
index 0000000000..bebaf9c8ba
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-373224be81ff98db60e9f81536f16a9ef92792d5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-59b587d15c0bcdb985417cd7a133cecfcc232698 b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-59b587d15c0bcdb985417cd7a133cecfcc232698
new file mode 100644
index 0000000000..3fa801139e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-59b587d15c0bcdb985417cd7a133cecfcc232698
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5d73de981fb75553a7b2606e111716ee9f2af844 b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5d73de981fb75553a7b2606e111716ee9f2af844
new file mode 100644
index 0000000000..6c25c18eae
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5d73de981fb75553a7b2606e111716ee9f2af844
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5fc15c2ee9c70fd834588cbd256cfb52cdcbcb8d b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5fc15c2ee9c70fd834588cbd256cfb52cdcbcb8d
new file mode 100644
index 0000000000..ce2ffbb6d5
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-5fc15c2ee9c70fd834588cbd256cfb52cdcbcb8d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-60a3f7ed4abddaa6a7c837ace86d048fa15e288b b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-60a3f7ed4abddaa6a7c837ace86d048fa15e288b
new file mode 100644
index 0000000000..3e441c97c7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-60a3f7ed4abddaa6a7c837ace86d048fa15e288b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b208a1eb5ef9f229f309492329323f485768fa74 b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b208a1eb5ef9f229f309492329323f485768fa74
new file mode 100644
index 0000000000..e7a6aedd9f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b208a1eb5ef9f229f309492329323f485768fa74
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b5ae6881c767a7769bb957ac379f22aafe4ef05e b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b5ae6881c767a7769bb957ac379f22aafe4ef05e
new file mode 100644
index 0000000000..3518dffafc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-b5ae6881c767a7769bb957ac379f22aafe4ef05e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-da39a3ee5e6b4b0d3255bfef95601890afd80709 b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-da39a3ee5e6b4b0d3255bfef95601890afd80709
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/crash-da39a3ee5e6b4b0d3255bfef95601890afd80709
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d0a8deab4d26bc005d022184c311c1ce4d5327bb b/test/core/end2end/fuzzers/api_fuzzer_corpus/d0a8deab4d26bc005d022184c311c1ce4d5327bb
new file mode 100644
index 0000000000..e6490ffa1f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d0a8deab4d26bc005d022184c311c1ce4d5327bb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d0d622fa3916e800e959a3fc2c90e213d518e5f4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d0d622fa3916e800e959a3fc2c90e213d518e5f4
new file mode 100644
index 0000000000..0de93e6a0d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d0d622fa3916e800e959a3fc2c90e213d518e5f4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d123c89b3cafd995bf401032699fc7dba60f8de4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d123c89b3cafd995bf401032699fc7dba60f8de4
new file mode 100644
index 0000000000..0c90e71f90
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d123c89b3cafd995bf401032699fc7dba60f8de4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d263d6004c2cc33cd9d157dd31ff604870c4d6fb b/test/core/end2end/fuzzers/api_fuzzer_corpus/d263d6004c2cc33cd9d157dd31ff604870c4d6fb
new file mode 100644
index 0000000000..ca1f987170
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d263d6004c2cc33cd9d157dd31ff604870c4d6fb
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d29859445bfeff04ca22b20408f9aa0e2e161abc b/test/core/end2end/fuzzers/api_fuzzer_corpus/d29859445bfeff04ca22b20408f9aa0e2e161abc
new file mode 100644
index 0000000000..9177f89f7a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d29859445bfeff04ca22b20408f9aa0e2e161abc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d2ba1c23045223aa6f4c107f91d57786befae604 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2ba1c23045223aa6f4c107f91d57786befae604
new file mode 100644
index 0000000000..94600a7167
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2ba1c23045223aa6f4c107f91d57786befae604
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d2e66d1fdf0110212c632268aec5b06130db3e21 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2e66d1fdf0110212c632268aec5b06130db3e21
new file mode 100644
index 0000000000..e4fec6c9d4
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2e66d1fdf0110212c632268aec5b06130db3e21
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d2f7c85e3c87ad5b71ad423aa4a9d97a8191d867 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2f7c85e3c87ad5b71ad423aa4a9d97a8191d867
new file mode 100644
index 0000000000..4b5d54318f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d2f7c85e3c87ad5b71ad423aa4a9d97a8191d867
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d4bd740db31b0e9925ce331c9c7d2fae5c1d15f2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d4bd740db31b0e9925ce331c9c7d2fae5c1d15f2
new file mode 100644
index 0000000000..91e28514f0
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d4bd740db31b0e9925ce331c9c7d2fae5c1d15f2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d5dad7a599e22cff371d595a5014475301670892 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d5dad7a599e22cff371d595a5014475301670892
new file mode 100644
index 0000000000..20b04ddb83
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d5dad7a599e22cff371d595a5014475301670892
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d6b689f1b878d6914ced5d24f21c599c203594d4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/d6b689f1b878d6914ced5d24f21c599c203594d4
new file mode 100644
index 0000000000..b26a7a7b76
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d6b689f1b878d6914ced5d24f21c599c203594d4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/d716fb79cd7dd78d2ff66dc8a0e2acef9a93f98a b/test/core/end2end/fuzzers/api_fuzzer_corpus/d716fb79cd7dd78d2ff66dc8a0e2acef9a93f98a
new file mode 100644
index 0000000000..1006f60613
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/d716fb79cd7dd78d2ff66dc8a0e2acef9a93f98a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/da57f06258c4f0de07611263dfba8be669dd780c b/test/core/end2end/fuzzers/api_fuzzer_corpus/da57f06258c4f0de07611263dfba8be669dd780c
new file mode 100644
index 0000000000..c6435f7f95
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/da57f06258c4f0de07611263dfba8be669dd780c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/da97ec2d11daf27fe924513c463810c867b88983 b/test/core/end2end/fuzzers/api_fuzzer_corpus/da97ec2d11daf27fe924513c463810c867b88983
new file mode 100644
index 0000000000..b293ff0565
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/da97ec2d11daf27fe924513c463810c867b88983
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/daed40229642eab256927f3bfb0288e036eab89f b/test/core/end2end/fuzzers/api_fuzzer_corpus/daed40229642eab256927f3bfb0288e036eab89f
new file mode 100644
index 0000000000..a9903db045
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/daed40229642eab256927f3bfb0288e036eab89f
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/db25df0fa146d02874114b8605000e0135ff12dd b/test/core/end2end/fuzzers/api_fuzzer_corpus/db25df0fa146d02874114b8605000e0135ff12dd
new file mode 100644
index 0000000000..841f40f342
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/db25df0fa146d02874114b8605000e0135ff12dd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/dcaa24f054af09a755c794ac4c3485ee682437a9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/dcaa24f054af09a755c794ac4c3485ee682437a9
new file mode 100644
index 0000000000..975d9460e6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/dcaa24f054af09a755c794ac4c3485ee682437a9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/dcc039d81106cd60cd611ff540d4669ebd10fe68 b/test/core/end2end/fuzzers/api_fuzzer_corpus/dcc039d81106cd60cd611ff540d4669ebd10fe68
new file mode 100644
index 0000000000..8c1536af0d
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/dcc039d81106cd60cd611ff540d4669ebd10fe68
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/dd229da166c3bec675e882d17092238cf7d245f3 b/test/core/end2end/fuzzers/api_fuzzer_corpus/dd229da166c3bec675e882d17092238cf7d245f3
new file mode 100644
index 0000000000..2a994d9dda
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/dd229da166c3bec675e882d17092238cf7d245f3
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/dda7f9e8860f0e132312f57e3640402f33df308a b/test/core/end2end/fuzzers/api_fuzzer_corpus/dda7f9e8860f0e132312f57e3640402f33df308a
new file mode 100644
index 0000000000..f530f36b97
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/dda7f9e8860f0e132312f57e3640402f33df308a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ddd34e967b1460902af2d01818605e208c5c7524 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ddd34e967b1460902af2d01818605e208c5c7524
new file mode 100644
index 0000000000..c3d7d78386
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ddd34e967b1460902af2d01818605e208c5c7524
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/de45c55043f63ec680e990b1edf1f0cc60ebbf4e b/test/core/end2end/fuzzers/api_fuzzer_corpus/de45c55043f63ec680e990b1edf1f0cc60ebbf4e
new file mode 100644
index 0000000000..fab7ebbb2f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/de45c55043f63ec680e990b1edf1f0cc60ebbf4e
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/df29cf0d3cd5cfd27a98b506fffee64476398bba b/test/core/end2end/fuzzers/api_fuzzer_corpus/df29cf0d3cd5cfd27a98b506fffee64476398bba
new file mode 100644
index 0000000000..d40b23c032
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/df29cf0d3cd5cfd27a98b506fffee64476398bba
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e13344aeec0694c50eed41ae1b78e6d2ac4a4c6c b/test/core/end2end/fuzzers/api_fuzzer_corpus/e13344aeec0694c50eed41ae1b78e6d2ac4a4c6c
new file mode 100644
index 0000000000..3be56d333e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e13344aeec0694c50eed41ae1b78e6d2ac4a4c6c
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e28ffd8c2816f12f6395805199c792d1718191df b/test/core/end2end/fuzzers/api_fuzzer_corpus/e28ffd8c2816f12f6395805199c792d1718191df
new file mode 100644
index 0000000000..a867a8b0be
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e28ffd8c2816f12f6395805199c792d1718191df
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e37b4c7b64414d4705d934f8a723a50dcbf42571 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e37b4c7b64414d4705d934f8a723a50dcbf42571
new file mode 100644
index 0000000000..bc13609991
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e37b4c7b64414d4705d934f8a723a50dcbf42571
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e4068f14a046ce3ee7f1920cbd210b6e876c07ec b/test/core/end2end/fuzzers/api_fuzzer_corpus/e4068f14a046ce3ee7f1920cbd210b6e876c07ec
new file mode 100644
index 0000000000..6ddb7d618c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e4068f14a046ce3ee7f1920cbd210b6e876c07ec
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e452ab01690d7e326f5ef52f4a312d066c087a24 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e452ab01690d7e326f5ef52f4a312d066c087a24
new file mode 100644
index 0000000000..ff74e958c6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e452ab01690d7e326f5ef52f4a312d066c087a24
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e52ac2e3cad2e544488a01822115cb37d10a76ce b/test/core/end2end/fuzzers/api_fuzzer_corpus/e52ac2e3cad2e544488a01822115cb37d10a76ce
new file mode 100644
index 0000000000..b3bb2405d8
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e52ac2e3cad2e544488a01822115cb37d10a76ce
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e609da99f76fa36e4b9060650cbc3597af458b01 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e609da99f76fa36e4b9060650cbc3597af458b01
new file mode 100644
index 0000000000..9dac9955f6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e609da99f76fa36e4b9060650cbc3597af458b01
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e6b74f64e8bdfdf98177aee58b8729ff2aa7ffb2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e6b74f64e8bdfdf98177aee58b8729ff2aa7ffb2
new file mode 100644
index 0000000000..cc011513d3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e6b74f64e8bdfdf98177aee58b8729ff2aa7ffb2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e709e8861c09e29cdae73e337587a63fb0ccf76d b/test/core/end2end/fuzzers/api_fuzzer_corpus/e709e8861c09e29cdae73e337587a63fb0ccf76d
new file mode 100644
index 0000000000..a481542791
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e709e8861c09e29cdae73e337587a63fb0ccf76d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e839090caa1b1bfa8898eea683f5d5c9f1ed6dd1 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e839090caa1b1bfa8898eea683f5d5c9f1ed6dd1
new file mode 100644
index 0000000000..af332baf9a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e839090caa1b1bfa8898eea683f5d5c9f1ed6dd1
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e97beccbdbb6e29eb476efec4ea2c96c310e6615 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e97beccbdbb6e29eb476efec4ea2c96c310e6615
new file mode 100644
index 0000000000..1c33e4fd5a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e97beccbdbb6e29eb476efec4ea2c96c310e6615
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e9932127668f9de0743fc639dca31acedbfc68fd b/test/core/end2end/fuzzers/api_fuzzer_corpus/e9932127668f9de0743fc639dca31acedbfc68fd
new file mode 100644
index 0000000000..62fe8fd03e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e9932127668f9de0743fc639dca31acedbfc68fd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/e9d470cdf421f6c6c9eefd7f84bd09df6a8994b2 b/test/core/end2end/fuzzers/api_fuzzer_corpus/e9d470cdf421f6c6c9eefd7f84bd09df6a8994b2
new file mode 100644
index 0000000000..3d19da0697
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/e9d470cdf421f6c6c9eefd7f84bd09df6a8994b2
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/eacf4905e489566a3e5fcaaeac9fe91cbf916e06 b/test/core/end2end/fuzzers/api_fuzzer_corpus/eacf4905e489566a3e5fcaaeac9fe91cbf916e06
new file mode 100644
index 0000000000..44f3e00f98
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/eacf4905e489566a3e5fcaaeac9fe91cbf916e06
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/eaddce3919388311104c50b9089461ff59c8ac14 b/test/core/end2end/fuzzers/api_fuzzer_corpus/eaddce3919388311104c50b9089461ff59c8ac14
new file mode 100644
index 0000000000..d81c34e934
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/eaddce3919388311104c50b9089461ff59c8ac14
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ec55cbebe6db506acf7af9e5d26386630319623d b/test/core/end2end/fuzzers/api_fuzzer_corpus/ec55cbebe6db506acf7af9e5d26386630319623d
new file mode 100644
index 0000000000..14ebab0cf3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ec55cbebe6db506acf7af9e5d26386630319623d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ec823f4018389e64a99f6580277fba28df6bd136 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ec823f4018389e64a99f6580277fba28df6bd136
new file mode 100644
index 0000000000..2e6d409d39
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ec823f4018389e64a99f6580277fba28df6bd136
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ed47f70f76dadbb6744ede3eb7016f585c9fe59a b/test/core/end2end/fuzzers/api_fuzzer_corpus/ed47f70f76dadbb6744ede3eb7016f585c9fe59a
new file mode 100644
index 0000000000..be50868c61
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ed47f70f76dadbb6744ede3eb7016f585c9fe59a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ed7d0b055e59602ec752162db7afc2b36ac7800a b/test/core/end2end/fuzzers/api_fuzzer_corpus/ed7d0b055e59602ec752162db7afc2b36ac7800a
new file mode 100644
index 0000000000..73c5db3098
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ed7d0b055e59602ec752162db7afc2b36ac7800a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/edecc59c5809796f266abd8df4d5ecf6aae304ca b/test/core/end2end/fuzzers/api_fuzzer_corpus/edecc59c5809796f266abd8df4d5ecf6aae304ca
new file mode 100644
index 0000000000..805106a4fc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/edecc59c5809796f266abd8df4d5ecf6aae304ca
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ee2c1ac1e668f22836cf25a59495e778b0e2c7a8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee2c1ac1e668f22836cf25a59495e778b0e2c7a8
new file mode 100644
index 0000000000..f1990ac231
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee2c1ac1e668f22836cf25a59495e778b0e2c7a8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ee42f876c500996016a9f4a989147e5c2b5019fa b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee42f876c500996016a9f4a989147e5c2b5019fa
new file mode 100644
index 0000000000..79770813f9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee42f876c500996016a9f4a989147e5c2b5019fa
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ee6855178435d2046d8763ecae46e1e0a71a95f4 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee6855178435d2046d8763ecae46e1e0a71a95f4
new file mode 100644
index 0000000000..6badaf36dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee6855178435d2046d8763ecae46e1e0a71a95f4
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ee90aa84710c6a218a84b49ca6bc5d0e7a324220 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee90aa84710c6a218a84b49ca6bc5d0e7a324220
new file mode 100644
index 0000000000..095b25464a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ee90aa84710c6a218a84b49ca6bc5d0e7a324220
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/eeb310d91038cb02862e187e68c5d6578233485b b/test/core/end2end/fuzzers/api_fuzzer_corpus/eeb310d91038cb02862e187e68c5d6578233485b
new file mode 100644
index 0000000000..1b05cfb036
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/eeb310d91038cb02862e187e68c5d6578233485b
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ef20d859b09ca00a80782df7097881ec4299cd25 b/test/core/end2end/fuzzers/api_fuzzer_corpus/ef20d859b09ca00a80782df7097881ec4299cd25
new file mode 100644
index 0000000000..f4077be7de
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ef20d859b09ca00a80782df7097881ec4299cd25
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/ef24beeeff80ec8ad728919794e9de4a06cf7daa b/test/core/end2end/fuzzers/api_fuzzer_corpus/ef24beeeff80ec8ad728919794e9de4a06cf7daa
new file mode 100644
index 0000000000..39b8ac4cc3
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/ef24beeeff80ec8ad728919794e9de4a06cf7daa
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/efa40f9e7f8a5ba4649dbad1a66ff9cc6bc699b8 b/test/core/end2end/fuzzers/api_fuzzer_corpus/efa40f9e7f8a5ba4649dbad1a66ff9cc6bc699b8
new file mode 100644
index 0000000000..8927909b7c
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/efa40f9e7f8a5ba4649dbad1a66ff9cc6bc699b8
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f07bc2907c95f2aeb79ca60e2ad826e13b848f45 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f07bc2907c95f2aeb79ca60e2ad826e13b848f45
new file mode 100644
index 0000000000..313d456262
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f07bc2907c95f2aeb79ca60e2ad826e13b848f45
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f09c5cabe569b5c22a16d7d584074d54d9343edc b/test/core/end2end/fuzzers/api_fuzzer_corpus/f09c5cabe569b5c22a16d7d584074d54d9343edc
new file mode 100644
index 0000000000..58644e12ae
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f09c5cabe569b5c22a16d7d584074d54d9343edc
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f1b2889ae7091d6a14332343fe7a2bffd81039a7 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f1b2889ae7091d6a14332343fe7a2bffd81039a7
new file mode 100644
index 0000000000..e7f28070f6
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f1b2889ae7091d6a14332343fe7a2bffd81039a7
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f2b838edb5715e9f0f73897ed74eddaede87a43a b/test/core/end2end/fuzzers/api_fuzzer_corpus/f2b838edb5715e9f0f73897ed74eddaede87a43a
new file mode 100644
index 0000000000..bcffbae085
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f2b838edb5715e9f0f73897ed74eddaede87a43a
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f3b3769d79f1d9586c575c27dff353f343ceacaf b/test/core/end2end/fuzzers/api_fuzzer_corpus/f3b3769d79f1d9586c575c27dff353f343ceacaf
new file mode 100644
index 0000000000..034f1983a9
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f3b3769d79f1d9586c575c27dff353f343ceacaf
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f3cad6a2ea4ebfd40568d4992d68784e82de2b20 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f3cad6a2ea4ebfd40568d4992d68784e82de2b20
new file mode 100644
index 0000000000..7a5e86bda7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f3cad6a2ea4ebfd40568d4992d68784e82de2b20
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f503f8d526eaec9bab6cae97d09207deefa85d8d b/test/core/end2end/fuzzers/api_fuzzer_corpus/f503f8d526eaec9bab6cae97d09207deefa85d8d
new file mode 100644
index 0000000000..6bdb2b0436
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f503f8d526eaec9bab6cae97d09207deefa85d8d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f575224a90d142bcd971b4f1634f4dc4988f8b15 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f575224a90d142bcd971b4f1634f4dc4988f8b15
new file mode 100644
index 0000000000..b4e7db949f
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f575224a90d142bcd971b4f1634f4dc4988f8b15
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f7623c34b3b5fb243fe589d881e4e8489f578f21 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f7623c34b3b5fb243fe589d881e4e8489f578f21
new file mode 100644
index 0000000000..46076b5f94
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f7623c34b3b5fb243fe589d881e4e8489f578f21
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f875ad5830cb0b5d387a267e0200eb3027d025d5 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f875ad5830cb0b5d387a267e0200eb3027d025d5
new file mode 100644
index 0000000000..dccc89ba77
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f875ad5830cb0b5d387a267e0200eb3027d025d5
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f9048c4c18e729b6f49e929876ec30866deb16a9 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f9048c4c18e729b6f49e929876ec30866deb16a9
new file mode 100644
index 0000000000..7c90edad4e
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f9048c4c18e729b6f49e929876ec30866deb16a9
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/f92897ee60bd24634aa1582f162c1c8f4b249148 b/test/core/end2end/fuzzers/api_fuzzer_corpus/f92897ee60bd24634aa1582f162c1c8f4b249148
new file mode 100644
index 0000000000..758adafd3b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/f92897ee60bd24634aa1582f162c1c8f4b249148
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fb17c3fec47ab446ee737ab4c7fa8cb85688d5be b/test/core/end2end/fuzzers/api_fuzzer_corpus/fb17c3fec47ab446ee737ab4c7fa8cb85688d5be
new file mode 100644
index 0000000000..2deefec71b
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fb17c3fec47ab446ee737ab4c7fa8cb85688d5be
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fb655905396b768cf3ff015afdb0b564dae2cdfd b/test/core/end2end/fuzzers/api_fuzzer_corpus/fb655905396b768cf3ff015afdb0b564dae2cdfd
new file mode 100644
index 0000000000..b02dabe03a
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fb655905396b768cf3ff015afdb0b564dae2cdfd
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fc824337cead8b9e5229119c85c284fdd8e2d391 b/test/core/end2end/fuzzers/api_fuzzer_corpus/fc824337cead8b9e5229119c85c284fdd8e2d391
new file mode 100644
index 0000000000..20ca7b5262
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fc824337cead8b9e5229119c85c284fdd8e2d391
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fd05ad1a9d183c2a25d820aca9940caacbaa0660 b/test/core/end2end/fuzzers/api_fuzzer_corpus/fd05ad1a9d183c2a25d820aca9940caacbaa0660
new file mode 100644
index 0000000000..3261a7bfda
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fd05ad1a9d183c2a25d820aca9940caacbaa0660
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fd4f7d5d3d21c75ccb5cde9491bf952bae753390 b/test/core/end2end/fuzzers/api_fuzzer_corpus/fd4f7d5d3d21c75ccb5cde9491bf952bae753390
new file mode 100644
index 0000000000..fc7226b8e7
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fd4f7d5d3d21c75ccb5cde9491bf952bae753390
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fdb038087233cd176746558875932029f779221d b/test/core/end2end/fuzzers/api_fuzzer_corpus/fdb038087233cd176746558875932029f779221d
new file mode 100644
index 0000000000..017fdbf661
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fdb038087233cd176746558875932029f779221d
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/fe786c056e1e068e9cb9a94d7e10cee1593436bc b/test/core/end2end/fuzzers/api_fuzzer_corpus/fe786c056e1e068e9cb9a94d7e10cee1593436bc
new file mode 100644
index 0000000000..28b1302d47
--- /dev/null
+++ b/test/core/end2end/fuzzers/api_fuzzer_corpus/fe786c056e1e068e9cb9a94d7e10cee1593436bc
diff --git a/test/core/end2end/fuzzers/client_fuzzer.c b/test/core/end2end/fuzzers/client_fuzzer.c
index c5260cd287..e7e7dbefd0 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.c
+++ b/test/core/end2end/fuzzers/client_fuzzer.c
@@ -37,6 +37,7 @@
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/surface/channel.h"
 #include "test/core/util/memory_counters.h"
 #include "test/core/util/mock_endpoint.h"
@@ -51,7 +52,7 @@ static void *tag(int n) { return (void *)(uintptr_t)n; }
 static void dont_log(gpr_log_func_args *args) {}
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  grpc_test_only_set_metadata_hash_seed(0);
+  grpc_test_only_set_slice_hash_seed(0);
   struct grpc_memory_counters counters;
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
@@ -62,7 +63,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       grpc_resource_quota_create("client_fuzzer");
   grpc_endpoint *mock_endpoint =
       grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
 
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
   grpc_transport *transport =
@@ -71,9 +72,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 
   grpc_channel *channel = grpc_channel_create(
       &exec_ctx, "test-target", NULL, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-  grpc_call *call =
-      grpc_channel_create_call(channel, NULL, 0, cq, "/foo", "localhost",
-                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  grpc_slice host = grpc_slice_from_static_string("localhost");
+  grpc_call *call = grpc_channel_create_call(
+      channel, NULL, 0, cq, grpc_slice_from_static_string("/foo"), &host,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -81,8 +83,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   grpc_metadata_array trailing_metadata_recv;
   grpc_metadata_array_init(&trailing_metadata_recv);
   grpc_status_code status;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details = grpc_empty_slice();
 
   grpc_op ops[6];
   memset(ops, 0, sizeof(ops));
@@ -97,12 +98,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -110,7 +111,6 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -155,7 +155,7 @@ done:
   grpc_completion_queue_destroy(cq);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_channel_destroy(channel);
   if (response_payload_recv != NULL) {
     grpc_byte_buffer_destroy(response_payload_recv);
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/175f16901997fdee41ac9ec88f7e018d46d774e7 b/test/core/end2end/fuzzers/client_fuzzer_corpus/175f16901997fdee41ac9ec88f7e018d46d774e7
new file mode 100644
index 0000000000..1cf81515f3
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/175f16901997fdee41ac9ec88f7e018d46d774e7
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/26f250ae38865f030176a8801ce992536351a326 b/test/core/end2end/fuzzers/client_fuzzer_corpus/26f250ae38865f030176a8801ce992536351a326
new file mode 100644
index 0000000000..6c970a4a05
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/26f250ae38865f030176a8801ce992536351a326
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/3233f2ab3b6c9431289ef7dc4f40676d0128bcad b/test/core/end2end/fuzzers/client_fuzzer_corpus/3233f2ab3b6c9431289ef7dc4f40676d0128bcad
new file mode 100644
index 0000000000..64eef0085c
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/3233f2ab3b6c9431289ef7dc4f40676d0128bcad
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/3656614c7b0dc11d4dd7e1826f77fa96a88c420f b/test/core/end2end/fuzzers/client_fuzzer_corpus/3656614c7b0dc11d4dd7e1826f77fa96a88c420f
new file mode 100644
index 0000000000..fb9667c5a2
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/3656614c7b0dc11d4dd7e1826f77fa96a88c420f
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/3dec1981e8677ec6ad2517feba29869d53f8d884 b/test/core/end2end/fuzzers/client_fuzzer_corpus/3dec1981e8677ec6ad2517feba29869d53f8d884
new file mode 100644
index 0000000000..92ff8bcb26
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/3dec1981e8677ec6ad2517feba29869d53f8d884
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/4bed84590a55b06d7eb30d8faa4b00a881ba9b2c b/test/core/end2end/fuzzers/client_fuzzer_corpus/4bed84590a55b06d7eb30d8faa4b00a881ba9b2c
new file mode 100644
index 0000000000..3e3365e861
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/4bed84590a55b06d7eb30d8faa4b00a881ba9b2c
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/591d46b83d2e6babc0ce3c753c4606a10c46d7ce b/test/core/end2end/fuzzers/client_fuzzer_corpus/591d46b83d2e6babc0ce3c753c4606a10c46d7ce
new file mode 100644
index 0000000000..addaccb045
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/591d46b83d2e6babc0ce3c753c4606a10c46d7ce
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/5a52d683c9342dd301b0e699db36175aad715e1d b/test/core/end2end/fuzzers/client_fuzzer_corpus/5a52d683c9342dd301b0e699db36175aad715e1d
new file mode 100644
index 0000000000..e9e09a1b0d
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/5a52d683c9342dd301b0e699db36175aad715e1d
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/5b7ff7c113c2bcf125271d22c937f758a0cd2ee4 b/test/core/end2end/fuzzers/client_fuzzer_corpus/5b7ff7c113c2bcf125271d22c937f758a0cd2ee4
new file mode 100644
index 0000000000..2ccc02dcc6
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/5b7ff7c113c2bcf125271d22c937f758a0cd2ee4
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/616e55354ba3517ce6762d6cd56600f97915e646 b/test/core/end2end/fuzzers/client_fuzzer_corpus/616e55354ba3517ce6762d6cd56600f97915e646
new file mode 100644
index 0000000000..ccaeedbac6
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/616e55354ba3517ce6762d6cd56600f97915e646
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/7a9a12b15c798b88f1a599779f52d14edf9f4ef5 b/test/core/end2end/fuzzers/client_fuzzer_corpus/7a9a12b15c798b88f1a599779f52d14edf9f4ef5
new file mode 100644
index 0000000000..05e8c3952c
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/7a9a12b15c798b88f1a599779f52d14edf9f4ef5
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/8f05b8da748cc04e64b688c4b435fe64699bd481 b/test/core/end2end/fuzzers/client_fuzzer_corpus/8f05b8da748cc04e64b688c4b435fe64699bd481
new file mode 100644
index 0000000000..53a44036f4
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/8f05b8da748cc04e64b688c4b435fe64699bd481
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/8fd758e2603f1e3772cfcd295ff0f951988d7648 b/test/core/end2end/fuzzers/client_fuzzer_corpus/8fd758e2603f1e3772cfcd295ff0f951988d7648
new file mode 100644
index 0000000000..33a7bd8b82
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/8fd758e2603f1e3772cfcd295ff0f951988d7648
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/9018925b5e791ae4b3ae9c84b8a4d47d86671c2d b/test/core/end2end/fuzzers/client_fuzzer_corpus/9018925b5e791ae4b3ae9c84b8a4d47d86671c2d
new file mode 100644
index 0000000000..fccac2a4ae
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/9018925b5e791ae4b3ae9c84b8a4d47d86671c2d
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/9912de197918ac0e305f0c0107f863823e8ae818 b/test/core/end2end/fuzzers/client_fuzzer_corpus/9912de197918ac0e305f0c0107f863823e8ae818
new file mode 100644
index 0000000000..5304b1e5b6
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/9912de197918ac0e305f0c0107f863823e8ae818
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/ab90bebd4c017827a6d5de61511445df81169eb6 b/test/core/end2end/fuzzers/client_fuzzer_corpus/ab90bebd4c017827a6d5de61511445df81169eb6
new file mode 100644
index 0000000000..3cdcdf9e6f
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/ab90bebd4c017827a6d5de61511445df81169eb6
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/b26a3a83d0b319ce13a9ae164e90fa6da1b05a57 b/test/core/end2end/fuzzers/client_fuzzer_corpus/b26a3a83d0b319ce13a9ae164e90fa6da1b05a57
new file mode 100644
index 0000000000..908355a681
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/b26a3a83d0b319ce13a9ae164e90fa6da1b05a57
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/ba25be123c630bd3e4aeb9bda6304dd1a7e51365 b/test/core/end2end/fuzzers/client_fuzzer_corpus/ba25be123c630bd3e4aeb9bda6304dd1a7e51365
new file mode 100644
index 0000000000..1f1b88ac8d
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/ba25be123c630bd3e4aeb9bda6304dd1a7e51365
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/c77ee0b6cb21ab7b7cf222c7f6563b3b1b1b6eed b/test/core/end2end/fuzzers/client_fuzzer_corpus/c77ee0b6cb21ab7b7cf222c7f6563b3b1b1b6eed
new file mode 100644
index 0000000000..3f14a28a44
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/c77ee0b6cb21ab7b7cf222c7f6563b3b1b1b6eed
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/c7b17d6ae5f3b155532a5a9bf0239c098c35eec1 b/test/core/end2end/fuzzers/client_fuzzer_corpus/c7b17d6ae5f3b155532a5a9bf0239c098c35eec1
new file mode 100644
index 0000000000..e0d5825270
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/c7b17d6ae5f3b155532a5a9bf0239c098c35eec1
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/ccc36ee2c6a0daad65a4d929599fda5cd38b8fd1 b/test/core/end2end/fuzzers/client_fuzzer_corpus/ccc36ee2c6a0daad65a4d929599fda5cd38b8fd1
new file mode 100644
index 0000000000..e612b05fb5
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/ccc36ee2c6a0daad65a4d929599fda5cd38b8fd1
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/crash-133500314833c9037b34a4c34ad779dd78a0fa8d b/test/core/end2end/fuzzers/client_fuzzer_corpus/crash-133500314833c9037b34a4c34ad779dd78a0fa8d
new file mode 100644
index 0000000000..e475765eef
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/crash-133500314833c9037b34a4c34ad779dd78a0fa8d
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/d3141a71cdaa7a0915c8c55abf2c940b0fd00172 b/test/core/end2end/fuzzers/client_fuzzer_corpus/d3141a71cdaa7a0915c8c55abf2c940b0fd00172
new file mode 100644
index 0000000000..e2881dae02
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/d3141a71cdaa7a0915c8c55abf2c940b0fd00172
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/de9b9a35e1e7040e842b597b8d2fe4cd602e67f1 b/test/core/end2end/fuzzers/client_fuzzer_corpus/de9b9a35e1e7040e842b597b8d2fe4cd602e67f1
new file mode 100644
index 0000000000..7b8d43ea27
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/de9b9a35e1e7040e842b597b8d2fe4cd602e67f1
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/e5319a8570a762bbdd67135b49579097324e369a b/test/core/end2end/fuzzers/client_fuzzer_corpus/e5319a8570a762bbdd67135b49579097324e369a
new file mode 100644
index 0000000000..128aef0fd5
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/e5319a8570a762bbdd67135b49579097324e369a
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/e5e276acd665ccb47f868fe3bc36e647bbb840bd b/test/core/end2end/fuzzers/client_fuzzer_corpus/e5e276acd665ccb47f868fe3bc36e647bbb840bd
new file mode 100644
index 0000000000..05b14a7035
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/e5e276acd665ccb47f868fe3bc36e647bbb840bd
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/f69aa5666fd60c1b6814198f12d049abb0e9f148 b/test/core/end2end/fuzzers/client_fuzzer_corpus/f69aa5666fd60c1b6814198f12d049abb0e9f148
new file mode 100644
index 0000000000..380bac227a
--- /dev/null
+++ b/test/core/end2end/fuzzers/client_fuzzer_corpus/f69aa5666fd60c1b6814198f12d049abb0e9f148
diff --git a/test/core/end2end/fuzzers/hpack.dictionary b/test/core/end2end/fuzzers/hpack.dictionary
index 12db0ff024..81a2419d12 100644
--- a/test/core/end2end/fuzzers/hpack.dictionary
+++ b/test/core/end2end/fuzzers/hpack.dictionary
@@ -1,24 +1,62 @@
 # hpack fuzzing dictionary
+"\x05:path"
+"\x07:method"
+"\x07:status"
+"\x0A:authority"
+"\x07:scheme"
+"\x02te"
+"\x0Cgrpc-message"
+"\x0Bgrpc-status"
+"\x10grpc-payload-bin"
+"\x0Dgrpc-encoding"
+"\x14grpc-accept-encoding"
+"\x0Ccontent-type"
+"\x1Egrpc-internal-encoding-request"
+"\x0Auser-agent"
+"\x04host"
+"\x08lb-token"
+"\x0Blb-cost-bin"
+"\x0Cgrpc-timeout"
+"\x10grpc-tracing-bin"
+"\x0Egrpc-stats-bin"
+"\x00"
+"\x13grpc.wait_for_ready"
+"\x0Cgrpc.timeout"
+"\x1Egrpc.max_request_message_bytes"
+"\x1Fgrpc.max_response_message_bytes"
+"$/grpc.lb.v1.LoadBalancer/BalanceLoad"
 "\x010"
 "\x011"
 "\x012"
+"\x08identity"
+"\x04gzip"
+"\x07deflate"
+"\x08trailers"
+"\x10application/grpc"
+"\x04POST"
 "\x03200"
+"\x03404"
+"\x04http"
+"\x05https"
+"\x04grpc"
+"\x03GET"
+"\x03PUT"
+"\x01/"
+"\x0B/index.html"
 "\x03204"
 "\x03206"
 "\x03304"
 "\x03400"
-"\x03404"
 "\x03500"
-"\x06accept"
 "\x0Eaccept-charset"
 "\x0Faccept-encoding"
+"\x0Dgzip, deflate"
 "\x0Faccept-language"
 "\x0Daccept-ranges"
+"\x06accept"
 "\x1Baccess-control-allow-origin"
 "\x03age"
 "\x05allow"
-"\x10application/grpc"
-"\x0A:authority"
 "\x0Dauthorization"
 "\x0Dcache-control"
 "\x13content-disposition"
@@ -27,81 +65,71 @@
 "\x0Econtent-length"
 "\x10content-location"
 "\x0Dcontent-range"
-"\x0Ccontent-type"
 "\x06cookie"
 "\x04date"
-"\x07deflate"
-"\x0Cdeflate,gzip"
-"\x00"
 "\x04etag"
 "\x06expect"
 "\x07expires"
 "\x04from"
-"\x03GET"
-"\x04grpc"
-"\x14grpc-accept-encoding"
-"\x0Dgrpc-encoding"
-"\x1Egrpc-internal-encoding-request"
-"\x0Cgrpc-message"
-"\x10grpc-payload-bin"
-"\x0Egrpc-stats-bin"
-"\x0Bgrpc-status"
-"\x0Cgrpc-timeout"
-"\x10grpc-tracing-bin"
-"\x04gzip"
-"\x0Dgzip, deflate"
-"\x04host"
-"\x04http"
-"\x05https"
-"\x08identity"
-"\x10identity,deflate"
-"\x15identity,deflate,gzip"
-"\x0Didentity,gzip"
 "\x08if-match"
 "\x11if-modified-since"
 "\x0Dif-none-match"
 "\x08if-range"
 "\x13if-unmodified-since"
 "\x0Dlast-modified"
-"\x0Blb-cost-bin"
-"\x08lb-token"
 "\x04link"
 "\x08location"
 "\x0Cmax-forwards"
-"\x07:method"
-"\x05:path"
-"\x04POST"
 "\x12proxy-authenticate"
 "\x13proxy-authorization"
-"\x03PUT"
 "\x05range"
 "\x07referer"
 "\x07refresh"
 "\x0Bretry-after"
-"\x07:scheme"
 "\x06server"
 "\x0Aset-cookie"
-"\x01/"
-"\x0B/index.html"
-"\x07:status"
 "\x19strict-transport-security"
-"\x02te"
-"\x08trailers"
 "\x11transfer-encoding"
-"\x0Auser-agent"
 "\x04vary"
 "\x03via"
 "\x10www-authenticate"
+"\x10identity,deflate"
+"\x0Didentity,gzip"
+"\x0Cdeflate,gzip"
+"\x15identity,deflate,gzip"
+"\x00\x0Bgrpc-status\x010"
+"\x00\x0Bgrpc-status\x011"
+"\x00\x0Bgrpc-status\x012"
+"\x00\x0Dgrpc-encoding\x08identity"
+"\x00\x0Dgrpc-encoding\x04gzip"
+"\x00\x0Dgrpc-encoding\x07deflate"
+"\x00\x02te\x08trailers"
+"\x00\x0Ccontent-type\x10application/grpc"
+"\x00\x07:method\x04POST"
+"\x00\x07:status\x03200"
+"\x00\x07:status\x03404"
+"\x00\x07:scheme\x04http"
+"\x00\x07:scheme\x05https"
+"\x00\x07:scheme\x04grpc"
+"\x00\x0A:authority\x00"
+"\x00\x07:method\x03GET"
+"\x00\x07:method\x03PUT"
+"\x00\x05:path\x01/"
+"\x00\x05:path\x0B/index.html"
+"\x00\x07:status\x03204"
+"\x00\x07:status\x03206"
+"\x00\x07:status\x03304"
+"\x00\x07:status\x03400"
+"\x00\x07:status\x03500"
 "\x00\x0Eaccept-charset\x00"
-"\x00\x06accept\x00"
 "\x00\x0Faccept-encoding\x00"
 "\x00\x0Faccept-encoding\x0Dgzip, deflate"
 "\x00\x0Faccept-language\x00"
 "\x00\x0Daccept-ranges\x00"
+"\x00\x06accept\x00"
 "\x00\x1Baccess-control-allow-origin\x00"
 "\x00\x03age\x00"
 "\x00\x05allow\x00"
-"\x00\x0A:authority\x00"
 "\x00\x0Dauthorization\x00"
 "\x00\x0Dcache-control\x00"
 "\x00\x13content-disposition\x00"
@@ -110,7 +138,6 @@
 "\x00\x0Econtent-length\x00"
 "\x00\x10content-location\x00"
 "\x00\x0Dcontent-range\x00"
-"\x00\x0Ccontent-type\x10application/grpc"
 "\x00\x0Ccontent-type\x00"
 "\x00\x06cookie\x00"
 "\x00\x04date\x00"
@@ -118,19 +145,6 @@
 "\x00\x06expect\x00"
 "\x00\x07expires\x00"
 "\x00\x04from\x00"
-"\x00\x14grpc-accept-encoding\x07deflate"
-"\x00\x14grpc-accept-encoding\x0Cdeflate,gzip"
-"\x00\x14grpc-accept-encoding\x04gzip"
-"\x00\x14grpc-accept-encoding\x08identity"
-"\x00\x14grpc-accept-encoding\x10identity,deflate"
-"\x00\x14grpc-accept-encoding\x15identity,deflate,gzip"
-"\x00\x14grpc-accept-encoding\x0Didentity,gzip"
-"\x00\x0Dgrpc-encoding\x07deflate"
-"\x00\x0Dgrpc-encoding\x04gzip"
-"\x00\x0Dgrpc-encoding\x08identity"
-"\x00\x0Bgrpc-status\x010"
-"\x00\x0Bgrpc-status\x011"
-"\x00\x0Bgrpc-status\x012"
 "\x00\x04host\x00"
 "\x00\x08if-match\x00"
 "\x00\x11if-modified-since\x00"
@@ -138,38 +152,29 @@
 "\x00\x08if-range\x00"
 "\x00\x13if-unmodified-since\x00"
 "\x00\x0Dlast-modified\x00"
-"\x00\x0Blb-cost-bin\x00"
 "\x00\x08lb-token\x00"
+"\x00\x0Blb-cost-bin\x00"
 "\x00\x04link\x00"
 "\x00\x08location\x00"
 "\x00\x0Cmax-forwards\x00"
-"\x00\x07:method\x03GET"
-"\x00\x07:method\x04POST"
-"\x00\x07:method\x03PUT"
-"\x00\x05:path\x01/"
-"\x00\x05:path\x0B/index.html"
 "\x00\x12proxy-authenticate\x00"
 "\x00\x13proxy-authorization\x00"
 "\x00\x05range\x00"
 "\x00\x07referer\x00"
 "\x00\x07refresh\x00"
 "\x00\x0Bretry-after\x00"
-"\x00\x07:scheme\x04grpc"
-"\x00\x07:scheme\x04http"
-"\x00\x07:scheme\x05https"
 "\x00\x06server\x00"
 "\x00\x0Aset-cookie\x00"
-"\x00\x07:status\x03200"
-"\x00\x07:status\x03204"
-"\x00\x07:status\x03206"
-"\x00\x07:status\x03304"
-"\x00\x07:status\x03400"
-"\x00\x07:status\x03404"
-"\x00\x07:status\x03500"
 "\x00\x19strict-transport-security\x00"
-"\x00\x02te\x08trailers"
 "\x00\x11transfer-encoding\x00"
 "\x00\x0Auser-agent\x00"
 "\x00\x04vary\x00"
 "\x00\x03via\x00"
 "\x00\x10www-authenticate\x00"
+"\x00\x14grpc-accept-encoding\x08identity"
+"\x00\x14grpc-accept-encoding\x07deflate"
+"\x00\x14grpc-accept-encoding\x10identity,deflate"
+"\x00\x14grpc-accept-encoding\x04gzip"
+"\x00\x14grpc-accept-encoding\x0Didentity,gzip"
+"\x00\x14grpc-accept-encoding\x0Cdeflate,gzip"
+"\x00\x14grpc-accept-encoding\x15identity,deflate,gzip"
diff --git a/test/core/end2end/fuzzers/server_fuzzer.c b/test/core/end2end/fuzzers/server_fuzzer.c
index 164022ec79..186542d4b2 100644
--- a/test/core/end2end/fuzzers/server_fuzzer.c
+++ b/test/core/end2end/fuzzers/server_fuzzer.c
@@ -34,6 +34,7 @@
 #include <grpc/grpc.h>
 
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/surface/server.h"
 #include "test/core/util/memory_counters.h"
 #include "test/core/util/mock_endpoint.h"
@@ -49,7 +50,7 @@ static int detag(void *p) { return (int)(uintptr_t)p; }
 static void dont_log(gpr_log_func_args *args) {}
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  grpc_test_only_set_metadata_hash_seed(0);
+  grpc_test_only_set_slice_hash_seed(0);
   struct grpc_memory_counters counters;
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
@@ -60,7 +61,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       grpc_resource_quota_create("server_fuzzer");
   grpc_endpoint *mock_endpoint =
       grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_mock_endpoint_put_read(
       &exec_ctx, mock_endpoint,
       grpc_slice_from_copied_buffer((const char *)data, size));
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/084e9e02b8f2ed41ff9c22fef80e522e491227c5 b/test/core/end2end/fuzzers/server_fuzzer_corpus/084e9e02b8f2ed41ff9c22fef80e522e491227c5
new file mode 100644
index 0000000000..dceac8308d
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/084e9e02b8f2ed41ff9c22fef80e522e491227c5
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/0c129f78eacfb0d0d3c89dd4e578724096a3cea0 b/test/core/end2end/fuzzers/server_fuzzer_corpus/0c129f78eacfb0d0d3c89dd4e578724096a3cea0
new file mode 100644
index 0000000000..98fcc6d4f0
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/0c129f78eacfb0d0d3c89dd4e578724096a3cea0
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/129382aa11fa2922053fa47ba691dddb98901260 b/test/core/end2end/fuzzers/server_fuzzer_corpus/129382aa11fa2922053fa47ba691dddb98901260
new file mode 100644
index 0000000000..aaab7408d6
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/129382aa11fa2922053fa47ba691dddb98901260
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/1353e447b7b10fb3eabb02863a1fc5bc9bb50460 b/test/core/end2end/fuzzers/server_fuzzer_corpus/1353e447b7b10fb3eabb02863a1fc5bc9bb50460
new file mode 100644
index 0000000000..80c050952b
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/1353e447b7b10fb3eabb02863a1fc5bc9bb50460
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/3b55d09b98e3982d6f80913a792463c3974766db b/test/core/end2end/fuzzers/server_fuzzer_corpus/3b55d09b98e3982d6f80913a792463c3974766db
new file mode 100644
index 0000000000..ef3d868d27
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/3b55d09b98e3982d6f80913a792463c3974766db
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/416160124b3b64fc9355f24dd789b3d1fd097b8b b/test/core/end2end/fuzzers/server_fuzzer_corpus/416160124b3b64fc9355f24dd789b3d1fd097b8b
new file mode 100644
index 0000000000..896d760dc4
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/416160124b3b64fc9355f24dd789b3d1fd097b8b
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/47563391b73b6ef4bf987014c3e631fe2555a377 b/test/core/end2end/fuzzers/server_fuzzer_corpus/47563391b73b6ef4bf987014c3e631fe2555a377
new file mode 100644
index 0000000000..ed9f1c8645
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/47563391b73b6ef4bf987014c3e631fe2555a377
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/6c0ec181e81b915071766762f5d78e9b1ccc9128 b/test/core/end2end/fuzzers/server_fuzzer_corpus/6c0ec181e81b915071766762f5d78e9b1ccc9128
new file mode 100644
index 0000000000..e373c1e20b
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/6c0ec181e81b915071766762f5d78e9b1ccc9128
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/6c66271b74a11f4e7065a6acbc86e4611e7e0dcc b/test/core/end2end/fuzzers/server_fuzzer_corpus/6c66271b74a11f4e7065a6acbc86e4611e7e0dcc
new file mode 100644
index 0000000000..c4a5dd5e7a
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/6c66271b74a11f4e7065a6acbc86e4611e7e0dcc
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/72db978194609ac138bca393650740a3eae8f448 b/test/core/end2end/fuzzers/server_fuzzer_corpus/72db978194609ac138bca393650740a3eae8f448
new file mode 100644
index 0000000000..8d3023a33c
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/72db978194609ac138bca393650740a3eae8f448
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/7df75412d12894fc501bd2d8493fe9e5a753ad88 b/test/core/end2end/fuzzers/server_fuzzer_corpus/7df75412d12894fc501bd2d8493fe9e5a753ad88
new file mode 100644
index 0000000000..d2200a2378
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/7df75412d12894fc501bd2d8493fe9e5a753ad88
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/92f1df2266f34a097e96dd22188d8633832d37b1 b/test/core/end2end/fuzzers/server_fuzzer_corpus/92f1df2266f34a097e96dd22188d8633832d37b1
new file mode 100644
index 0000000000..16a928deee
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/92f1df2266f34a097e96dd22188d8633832d37b1
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/947f53c0978672e59be452395670fa949a33cb4f b/test/core/end2end/fuzzers/server_fuzzer_corpus/947f53c0978672e59be452395670fa949a33cb4f
new file mode 100644
index 0000000000..1c1f163af3
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/947f53c0978672e59be452395670fa949a33cb4f
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/a40c3ba87b4206142b134f67485859b7c9b7c75c b/test/core/end2end/fuzzers/server_fuzzer_corpus/a40c3ba87b4206142b134f67485859b7c9b7c75c
new file mode 100644
index 0000000000..6cc09b4dc2
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/a40c3ba87b4206142b134f67485859b7c9b7c75c
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/a8305e9bb4a544eaef27e8bd21b4faabf524a84e b/test/core/end2end/fuzzers/server_fuzzer_corpus/a8305e9bb4a544eaef27e8bd21b4faabf524a84e
new file mode 100644
index 0000000000..9476948e84
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/a8305e9bb4a544eaef27e8bd21b4faabf524a84e
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/ac4e19c9fe290afc54bbb1e5f6cfe84a9c1f3c29 b/test/core/end2end/fuzzers/server_fuzzer_corpus/ac4e19c9fe290afc54bbb1e5f6cfe84a9c1f3c29
new file mode 100644
index 0000000000..6fb218b891
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/ac4e19c9fe290afc54bbb1e5f6cfe84a9c1f3c29
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/ae297426638eb5a0611324f403c3189515274f1b b/test/core/end2end/fuzzers/server_fuzzer_corpus/ae297426638eb5a0611324f403c3189515274f1b
new file mode 100644
index 0000000000..9540cb54e3
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/ae297426638eb5a0611324f403c3189515274f1b
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/b74dcd9c2780f145e09a27d2e03119576889a301 b/test/core/end2end/fuzzers/server_fuzzer_corpus/b74dcd9c2780f145e09a27d2e03119576889a301
new file mode 100644
index 0000000000..ffe5b3b6b6
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/b74dcd9c2780f145e09a27d2e03119576889a301
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/c39c0192d0d4f2b24f05c25a9e669cc091bff9e9 b/test/core/end2end/fuzzers/server_fuzzer_corpus/c39c0192d0d4f2b24f05c25a9e669cc091bff9e9
new file mode 100644
index 0000000000..0da037829f
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/c39c0192d0d4f2b24f05c25a9e669cc091bff9e9
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-73923add5066617ae08f187b79d2639b4fd96138 b/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-73923add5066617ae08f187b79d2639b4fd96138
new file mode 100644
index 0000000000..a06f3ce0d1
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-73923add5066617ae08f187b79d2639b4fd96138
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-901723090ff2042ecc5a008ccd7ae0845c1681cb b/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-901723090ff2042ecc5a008ccd7ae0845c1681cb
new file mode 100644
index 0000000000..9f909839dc
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/crash-901723090ff2042ecc5a008ccd7ae0845c1681cb
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/d297b3f84e3dee9f74bf1162718aff66a11a7f5c b/test/core/end2end/fuzzers/server_fuzzer_corpus/d297b3f84e3dee9f74bf1162718aff66a11a7f5c
new file mode 100644
index 0000000000..e619ae5434
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/d297b3f84e3dee9f74bf1162718aff66a11a7f5c
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/e021c5b9815f02ee9d1e5a003cbf3500e19db13c b/test/core/end2end/fuzzers/server_fuzzer_corpus/e021c5b9815f02ee9d1e5a003cbf3500e19db13c
new file mode 100644
index 0000000000..a3ae8221c9
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/e021c5b9815f02ee9d1e5a003cbf3500e19db13c
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/fc162db40f87facb73cff20751e23af2e1f5296e b/test/core/end2end/fuzzers/server_fuzzer_corpus/fc162db40f87facb73cff20751e23af2e1f5296e
new file mode 100644
index 0000000000..d63d69c2c3
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/fc162db40f87facb73cff20751e23af2e1f5296e
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/fcb1dea251d1ce74e30351f13a3f71e3debec3d2 b/test/core/end2end/fuzzers/server_fuzzer_corpus/fcb1dea251d1ce74e30351f13a3f71e3debec3d2
new file mode 100644
index 0000000000..84d6c210b7
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/fcb1dea251d1ce74e30351f13a3f71e3debec3d2
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/fe740f8c4ffd07f79456c8cee24ef556ee348f55 b/test/core/end2end/fuzzers/server_fuzzer_corpus/fe740f8c4ffd07f79456c8cee24ef556ee348f55
new file mode 100644
index 0000000000..3391a8399e
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/fe740f8c4ffd07f79456c8cee24ef556ee348f55
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-03c6f209b2f144734c83d81ed452839d9e244fe9 b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-03c6f209b2f144734c83d81ed452839d9e244fe9
new file mode 100644
index 0000000000..f9ce44a3c2
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-03c6f209b2f144734c83d81ed452839d9e244fe9
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-129ecb5e7b80616f36791e3580844e520f2ba7d3 b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-129ecb5e7b80616f36791e3580844e520f2ba7d3
new file mode 100644
index 0000000000..b11defdbe2
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-129ecb5e7b80616f36791e3580844e520f2ba7d3
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-30408c9d13f29804168fc62a0818cc894c6375ae b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-30408c9d13f29804168fc62a0818cc894c6375ae
new file mode 100644
index 0000000000..0eff0f19f7
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-30408c9d13f29804168fc62a0818cc894c6375ae
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-33d8bf197de7131be78244e10fbb0da5055cf266 b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-33d8bf197de7131be78244e10fbb0da5055cf266
new file mode 100644
index 0000000000..170119f265
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-33d8bf197de7131be78244e10fbb0da5055cf266
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-51cdbfa3e97a46ceefde405e6ab087a109c26907 b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-51cdbfa3e97a46ceefde405e6ab087a109c26907
new file mode 100644
index 0000000000..aeecff3c4d
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-51cdbfa3e97a46ceefde405e6ab087a109c26907
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-523cb1bca5ad56690c618b4ceac7fceca1113b9d b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-523cb1bca5ad56690c618b4ceac7fceca1113b9d
new file mode 100644
index 0000000000..b725ec18f0
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-523cb1bca5ad56690c618b4ceac7fceca1113b9d
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-a877fe99fd0e92721d162bc252bf72a4f67ba1ea b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-a877fe99fd0e92721d162bc252bf72a4f67ba1ea
new file mode 100644
index 0000000000..718794aa0e
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-a877fe99fd0e92721d162bc252bf72a4f67ba1ea
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-bd9d24f5c7c915174b6ca9d1a3573e16e0edee12 b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-bd9d24f5c7c915174b6ca9d1a3573e16e0edee12
new file mode 100644
index 0000000000..fa1e6fab82
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-bd9d24f5c7c915174b6ca9d1a3573e16e0edee12
diff --git a/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-f3c688876395bf7a529f29f7b91532726cf5cbce b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-f3c688876395bf7a529f29f7b91532726cf5cbce
new file mode 100644
index 0000000000..b66722c90c
--- /dev/null
+++ b/test/core/end2end/fuzzers/server_fuzzer_corpus/slow-unit-f3c688876395bf7a529f29f7b91532726cf5cbce
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 201a92a1fd..bcb7136eaa 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -143,6 +143,8 @@ END2END_TESTS = {
     'streaming_error_response': default_test_options,
     'trailing_metadata': default_test_options,
     'authority_not_supported': default_test_options,
+    'write_buffering': default_test_options,
+    'write_buffering_at_end': default_test_options,
 }
 
 
diff --git a/test/core/end2end/generate_tests.bzl b/test/core/end2end/generate_tests.bzl
new file mode 100755
index 0000000000..95c06de73f
--- /dev/null
+++ b/test/core/end2end/generate_tests.bzl
@@ -0,0 +1,194 @@
+#!/usr/bin/env python2.7
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+"""Generates the appropriate build.json data for all the end2end tests."""
+
+
+def fixture_options(fullstack=True, includes_proxy=False, dns_resolver=True,
+                    secure=True, tracing=False,
+                    platforms=['windows', 'linux', 'mac', 'posix']):
+  return struct(
+    fullstack=fullstack,
+    includes_proxy=includes_proxy,
+    dns_resolver=dns_resolver,
+    secure=secure,
+    tracing=tracing,
+    #platforms=platforms
+  )
+
+
+# maps fixture name to whether it requires the security library
+END2END_FIXTURES = {
+    'h2_compress': fixture_options(),
+    'h2_census': fixture_options(),
+    'h2_load_reporting': fixture_options(),
+    'h2_fakesec': fixture_options(),
+    'h2_fd': fixture_options(dns_resolver=False, fullstack=False,
+                             platforms=['linux', 'mac', 'posix']),
+    'h2_full': fixture_options(),
+    'h2_full+pipe': fixture_options(platforms=['linux']),
+    'h2_full+trace': fixture_options(tracing=True),
+    'h2_http_proxy': fixture_options(),
+    'h2_oauth2': fixture_options(),
+    'h2_proxy': fixture_options(includes_proxy=True),
+    'h2_sockpair_1byte': fixture_options(fullstack=False, dns_resolver=False),
+    'h2_sockpair': fixture_options(fullstack=False, dns_resolver=False),
+    'h2_sockpair+trace': fixture_options(fullstack=False, dns_resolver=False,
+                                         tracing=True),
+    'h2_ssl': fixture_options(secure=True),
+    'h2_ssl_cert': fixture_options(secure=True),
+    'h2_ssl_proxy': fixture_options(secure=True),
+    'h2_uds': fixture_options(dns_resolver=False,
+                              platforms=['linux', 'mac', 'posix']),
+}
+
+
+def test_options(needs_fullstack=False, needs_dns=False, proxyable=True,
+                 secure=False, traceable=False):
+  return struct(
+    needs_fullstack=needs_fullstack,
+    needs_dns=needs_dns,
+    proxyable=proxyable,
+    secure=secure,
+    traceable=traceable
+  )
+
+
+# maps test names to options
+END2END_TESTS = {
+    'bad_hostname': test_options(),
+    'binary_metadata': test_options(),
+    'resource_quota_server': test_options(proxyable=False),
+    'call_creds': test_options(secure=True),
+    'cancel_after_accept': test_options(),
+    'cancel_after_client_done': test_options(),
+    'cancel_after_invoke': test_options(),
+    'cancel_before_invoke': test_options(),
+    'cancel_in_a_vacuum': test_options(),
+    'cancel_with_status': test_options(),
+    'compressed_payload': test_options(),
+    'connectivity': test_options(needs_fullstack=True, proxyable=False),
+    'default_host': test_options(needs_fullstack=True, needs_dns=True),
+    'disappearing_server': test_options(needs_fullstack=True),
+    'empty_batch': test_options(),
+    'filter_causes_close': test_options(),
+    'filter_call_init_fails': test_options(),
+    'graceful_server_shutdown': test_options(),
+    'hpack_size': test_options(proxyable=False, traceable=False),
+    'high_initial_seqno': test_options(),
+    'idempotent_request': test_options(),
+    'invoke_large_request': test_options(),
+    'large_metadata': test_options(),
+    'max_concurrent_streams': test_options(proxyable=False),
+    'max_message_length': test_options(),
+    'negative_deadline': test_options(),
+    'network_status_change': test_options(),
+    'no_logging': test_options(traceable=False),
+    'no_op': test_options(),
+    'payload': test_options(),
+    'load_reporting_hook': test_options(),
+    'ping_pong_streaming': test_options(),
+    'ping': test_options(proxyable=False),
+    'registered_call': test_options(),
+    'request_with_flags': test_options(proxyable=False),
+    'request_with_payload': test_options(),
+    'server_finishes_request': test_options(),
+    'shutdown_finishes_calls': test_options(),
+    'shutdown_finishes_tags': test_options(),
+    'simple_cacheable_request': test_options(),
+    'simple_delayed_request': test_options(needs_fullstack=True),
+    'simple_metadata': test_options(),
+    'simple_request': test_options(),
+    'streaming_error_response': test_options(),
+    'trailing_metadata': test_options(),
+    'authority_not_supported': test_options(),
+    'filter_latency': test_options(),
+    'write_buffering': test_options(),
+    'write_buffering_at_end': test_options(),
+}
+
+
+def compatible(fopt, topt):
+  if topt.needs_fullstack:
+    if not fopt.fullstack:
+      return False
+  if topt.needs_dns:
+    if not fopt.dns_resolver:
+      return False
+  if not topt.proxyable:
+    if fopt.includes_proxy:
+      return False
+  if not topt.traceable:
+    if fopt.tracing:
+      return False
+  return True
+
+
+def grpc_end2end_tests():
+  native.cc_library(
+    name = 'end2end_tests',
+    srcs = ['end2end_tests.c', 'end2end_test_utils.c'] + [
+             'tests/%s.c' % t
+             for t in sorted(END2END_TESTS.keys())],
+    hdrs = [
+      'tests/cancel_test_helpers.h',
+      'end2end_tests.h'
+    ],
+    copts = ['-std=c99'],
+    deps = [
+      ':cq_verifier',
+      ':ssl_test_data',
+      ':fake_resolver',
+      ':http_proxy',
+      ':proxy',
+      '//test/core/util:grpc_test_util',
+      '//:grpc',
+      '//test/core/util:gpr_test_util',
+      '//:gpr',
+    ]
+  )
+
+  for f, fopt in END2END_FIXTURES.items():
+    native.cc_binary(
+      name = '%s_test' % f,
+      srcs = ['fixtures/%s.c' % f],
+      copts = ['-std=c99'],
+      deps = [':end2end_tests']
+    )
+    for t, topt in END2END_TESTS.items():
+      #print(compatible(fopt, topt), f, t, fopt, topt)
+      if not compatible(fopt, topt): continue
+      native.sh_test(
+        name = '%s_test@%s' % (f, t),
+        srcs = ['end2end_test.sh'],
+        args = ['$(location %s_test)' % f, t],
+        data = [':%s_test' % f],
+      )
diff --git a/test/core/end2end/goaway_server_test.c b/test/core/end2end/goaway_server_test.c
index cd68b390bb..c67c1f145a 100644
--- a/test/core/end2end/goaway_server_test.c
+++ b/test/core/end2end/goaway_server_test.c
@@ -101,8 +101,7 @@ int main(int argc, char **argv) {
   grpc_metadata_array request_metadata1;
   grpc_call_details request_details1;
   grpc_status_code status1;
-  char *details1 = NULL;
-  size_t details_capacity1 = 0;
+  grpc_slice details1;
   grpc_metadata_array_init(&trailing_metadata_recv1);
   grpc_metadata_array_init(&request_metadata1);
   grpc_call_details_init(&request_details1);
@@ -111,8 +110,7 @@ int main(int argc, char **argv) {
   grpc_metadata_array request_metadata2;
   grpc_call_details request_details2;
   grpc_status_code status2;
-  char *details2 = NULL;
-  size_t details_capacity2 = 0;
+  grpc_slice details2;
   grpc_metadata_array_init(&trailing_metadata_recv2);
   grpc_metadata_array_init(&request_metadata2);
   grpc_call_details_init(&request_details2);
@@ -137,9 +135,11 @@ int main(int argc, char **argv) {
   /* create a channel that picks first amongst the servers */
   grpc_channel *chan = grpc_insecure_channel_create("test", &client_args, NULL);
   /* and an initial call to them */
-  grpc_call *call1 = grpc_channel_create_call(
-      chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq, "/foo", "127.0.0.1",
-      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20), NULL);
+  grpc_slice host = grpc_slice_from_static_string("127.0.0.1");
+  grpc_call *call1 =
+      grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+                               grpc_slice_from_static_string("/foo"), &host,
+                               grpc_timeout_seconds_to_deadline(20), NULL);
   /* send initial metadata to probe connectivity */
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -158,7 +158,6 @@ int main(int argc, char **argv) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
   op->data.recv_status_on_client.status = &status1;
   op->data.recv_status_on_client.status_details = &details1;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity1;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -213,9 +212,10 @@ int main(int argc, char **argv) {
   cq_verify_empty(cqv);
 
   /* and a new call: should go through to server2 when we start it */
-  grpc_call *call2 = grpc_channel_create_call(
-      chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq, "/foo", "127.0.0.1",
-      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20), NULL);
+  grpc_call *call2 =
+      grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+                               grpc_slice_from_static_string("/foo"), &host,
+                               grpc_timeout_seconds_to_deadline(20), NULL);
   /* send initial metadata to probe connectivity */
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -234,7 +234,6 @@ int main(int argc, char **argv) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
   op->data.recv_status_on_client.status = &status2;
   op->data.recv_status_on_client.status_details = &details2;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity2;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -300,11 +299,11 @@ int main(int argc, char **argv) {
   grpc_metadata_array_destroy(&trailing_metadata_recv1);
   grpc_metadata_array_destroy(&request_metadata1);
   grpc_call_details_destroy(&request_details1);
-  gpr_free(details1);
+  grpc_slice_unref(details1);
   grpc_metadata_array_destroy(&trailing_metadata_recv2);
   grpc_metadata_array_destroy(&request_metadata2);
   grpc_call_details_destroy(&request_details2);
-  gpr_free(details2);
+  grpc_slice_unref(details2);
 
   cq_verifier_destroy(cqv);
   grpc_completion_queue_destroy(cq);
diff --git a/test/core/end2end/invalid_call_argument_test.c b/test/core/end2end/invalid_call_argument_test.c
index d974d2c8ff..2a9072570d 100644
--- a/test/core/end2end/invalid_call_argument_test.c
+++ b/test/core/end2end/invalid_call_argument_test.c
@@ -56,8 +56,7 @@ struct test_state {
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
-  char *details;
-  size_t details_capacity;
+  grpc_slice details;
   grpc_call *server_call;
   grpc_server *server;
   grpc_metadata_array server_initial_metadata_recv;
@@ -73,20 +72,20 @@ static void prepare_test(int is_client) {
   g_state.is_client = is_client;
   grpc_metadata_array_init(&g_state.initial_metadata_recv);
   grpc_metadata_array_init(&g_state.trailing_metadata_recv);
-  g_state.deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2);
+  g_state.deadline = grpc_timeout_seconds_to_deadline(2);
   g_state.cq = grpc_completion_queue_create(NULL);
   g_state.cqv = cq_verifier_create(g_state.cq);
-  g_state.details = NULL;
-  g_state.details_capacity = 0;
+  g_state.details = grpc_empty_slice();
   memset(g_state.ops, 0, sizeof(g_state.ops));
 
   if (is_client) {
     /* create a call, channel to a non existant server */
     g_state.chan =
         grpc_insecure_channel_create("nonexistant:54321", NULL, NULL);
+    grpc_slice host = grpc_slice_from_static_string("nonexistant");
     g_state.call = grpc_channel_create_call(
-        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq, "/Foo",
-        "nonexistant", g_state.deadline, NULL);
+        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq,
+        grpc_slice_from_static_string("/Foo"), &host, g_state.deadline, NULL);
   } else {
     g_state.server = grpc_server_create(NULL, NULL);
     grpc_server_register_completion_queue(g_state.server, g_state.cq, NULL);
@@ -97,9 +96,10 @@ static void prepare_test(int is_client) {
     gpr_join_host_port(&server_hostport, "localhost", port);
     g_state.chan = grpc_insecure_channel_create(server_hostport, NULL, NULL);
     gpr_free(server_hostport);
+    grpc_slice host = grpc_slice_from_static_string("bar");
     g_state.call = grpc_channel_create_call(
-        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq, "/Foo", "bar",
-        g_state.deadline, NULL);
+        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq,
+        grpc_slice_from_static_string("/Foo"), &host, g_state.deadline, NULL);
     grpc_metadata_array_init(&g_state.server_initial_metadata_recv);
     grpc_call_details_init(&g_state.call_details);
     op = g_state.ops;
@@ -126,7 +126,7 @@ static void cleanup_test() {
   grpc_call_destroy(g_state.call);
   cq_verifier_destroy(g_state.cqv);
   grpc_channel_destroy(g_state.chan);
-  gpr_free(g_state.details);
+  grpc_slice_unref(g_state.details);
   grpc_metadata_array_destroy(&g_state.initial_metadata_recv);
   grpc_metadata_array_destroy(&g_state.trailing_metadata_recv);
 
@@ -134,7 +134,7 @@ static void cleanup_test() {
     grpc_call_destroy(g_state.server_call);
     grpc_server_shutdown_and_notify(g_state.server, g_state.cq, tag(1000));
     GPR_ASSERT(grpc_completion_queue_pluck(g_state.cq, tag(1000),
-                                           GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5),
+                                           grpc_timeout_seconds_to_deadline(5),
                                            NULL)
                    .type == GRPC_OP_COMPLETE);
     grpc_server_destroy(g_state.server);
@@ -237,7 +237,7 @@ static void test_send_null_message() {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = NULL;
+  op->data.send_message.send_message = NULL;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -263,12 +263,12 @@ static void test_send_messages_at_the_same_time() {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = tag(2);
+  op->data.send_message.send_message = tag(2);
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -289,7 +289,8 @@ static void test_send_server_status_from_client() {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -306,7 +307,8 @@ static void test_receive_initial_metadata_twice_at_client() {
   prepare_test(1);
   op = g_state.ops;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &g_state.initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &g_state.initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -317,7 +319,8 @@ static void test_receive_initial_metadata_twice_at_client() {
   cq_verify(g_state.cqv);
   op = g_state.ops;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &g_state.initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &g_state.initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -335,7 +338,7 @@ static void test_receive_message_with_invalid_flags() {
   prepare_test(1);
   op = g_state.ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &payload;
+  op->data.recv_message.recv_message = &payload;
   op->flags = 1;
   op->reserved = NULL;
   op++;
@@ -353,12 +356,12 @@ static void test_receive_two_messages_at_the_same_time() {
   prepare_test(1);
   op = g_state.ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &payload;
+  op->data.recv_message.recv_message = &payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &payload;
+  op->data.recv_message.recv_message = &payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -398,8 +401,6 @@ static void test_recv_status_on_client_twice() {
       &g_state.trailing_metadata_recv;
   op->data.recv_status_on_client.status = &g_state.status;
   op->data.recv_status_on_client.status_details = &g_state.details;
-  op->data.recv_status_on_client.status_details_capacity =
-      &g_state.details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -414,7 +415,6 @@ static void test_recv_status_on_client_twice() {
   op->data.recv_status_on_client.trailing_metadata = NULL;
   op->data.recv_status_on_client.status = NULL;
   op->data.recv_status_on_client.status_details = NULL;
-  op->data.recv_status_on_client.status_details_capacity = NULL;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -453,8 +453,6 @@ static void test_recv_status_on_client_from_server() {
       &g_state.trailing_metadata_recv;
   op->data.recv_status_on_client.status = &g_state.status;
   op->data.recv_status_on_client.status_details = &g_state.details;
-  op->data.recv_status_on_client.status_details_capacity =
-      &g_state.details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -474,7 +472,8 @@ static void test_send_status_from_server_with_invalid_flags() {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 1;
   op->reserved = NULL;
   op++;
@@ -495,7 +494,8 @@ static void test_too_many_trailing_metadata() {
   op->data.send_status_from_server.trailing_metadata_count =
       (size_t)INT_MAX + 1;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -515,14 +515,15 @@ static void test_send_server_status_twice() {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -577,9 +578,8 @@ static void test_invalid_initial_metadata_reserved_key() {
   gpr_log(GPR_INFO, "test_invalid_initial_metadata_reserved_key");
 
   grpc_metadata metadata;
-  metadata.key = ":start_with_colon";
-  metadata.value = "value";
-  metadata.value_length = 6;
+  metadata.key = grpc_slice_from_static_string(":start_with_colon");
+  metadata.value = grpc_slice_from_static_string("value");
 
   grpc_op *op;
   prepare_test(1);
@@ -599,6 +599,7 @@ static void test_invalid_initial_metadata_reserved_key() {
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   grpc_init();
+  test_invalid_initial_metadata_reserved_key();
   test_non_null_reserved_on_start_batch();
   test_non_null_reserved_on_op();
   test_send_initial_metadata_more_than_once();
@@ -618,7 +619,6 @@ int main(int argc, char **argv) {
   test_send_server_status_twice();
   test_recv_close_on_server_with_invalid_flags();
   test_recv_close_on_server_twice();
-  test_invalid_initial_metadata_reserved_key();
   grpc_shutdown();
 
   return 0;
diff --git a/test/core/end2end/no_server_test.c b/test/core/end2end/no_server_test.c
index 03ff70a188..26d26d8f7a 100644
--- a/test/core/end2end/no_server_test.c
+++ b/test/core/end2end/no_server_test.c
@@ -45,15 +45,14 @@ static void *tag(intptr_t i) { return (void *)i; }
 int main(int argc, char **argv) {
   grpc_channel *chan;
   grpc_call *call;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(2);
   grpc_completion_queue *cq;
   cq_verifier *cqv;
   grpc_op ops[6];
   grpc_op *op;
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   grpc_test_init(argc, argv);
   grpc_init();
@@ -65,8 +64,10 @@ int main(int argc, char **argv) {
 
   /* create a call, channel to a non existant server */
   chan = grpc_insecure_channel_create("nonexistant:54321", NULL, NULL);
+  grpc_slice host = grpc_slice_from_static_string("nonexistant");
   call = grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                                  "/Foo", "nonexistant", deadline, NULL);
+                                  grpc_slice_from_static_string("/Foo"), &host,
+                                  deadline, NULL);
 
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -79,7 +80,6 @@ int main(int argc, char **argv) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -101,7 +101,7 @@ int main(int argc, char **argv) {
   grpc_channel_destroy(chan);
   cq_verifier_destroy(cqv);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
   grpc_shutdown();
diff --git a/test/core/end2end/tests/authority_not_supported.c b/test/core/end2end/tests/authority_not_supported.c
index 705970f6ca..7db2fd6b27 100644
--- a/test/core/end2end/tests/authority_not_supported.c
+++ b/test/core/end2end/tests/authority_not_supported.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -103,9 +103,14 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
   grpc_byte_buffer *request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
-  grpc_metadata meta_c[2] = {
-      {"key1", "val1", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key2", "val2", 4, 0, {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_c[2] = {{grpc_slice_from_static_string("key1"),
+                              grpc_slice_from_static_string("val1"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key2"),
+                              grpc_slice_from_static_string("val2"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
   grpc_end2end_test_fixture f =
       begin_test(config, "test_with_authority_header", NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
@@ -116,11 +121,12 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+                               grpc_slice_from_static_string("/foo"), &host,
+                               deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -135,7 +141,7 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -144,12 +150,12 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -157,7 +163,6 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -169,7 +174,7 @@ static void test_with_authority_header(grpc_end2end_test_config config) {
 
   GPR_ASSERT(status == GRPC_STATUS_CANCELLED);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
diff --git a/test/core/end2end/tests/bad_hostname.c b/test/core/end2end/tests/bad_hostname.c
index e0c7ac7c02..f50a5805a2 100644
--- a/test/core/end2end/tests/bad_hostname.c
+++ b/test/core/end2end/tests/bad_hostname.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_client(&f, client_args);
   config.init_server(&f, server_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -109,11 +109,12 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
+  grpc_slice host = grpc_slice_from_static_string("slartibartfast.local");
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "slartibartfast.local", deadline, NULL);
+                               grpc_slice_from_static_string("/foo"), &host,
+                               deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -133,7 +134,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -141,7 +142,6 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -153,7 +153,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
 
   GPR_ASSERT(status == GRPC_STATUS_INTERNAL);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/binary_metadata.c b/test/core/end2end/tests/binary_metadata.c
index dd7a8a9ad3..7fb60f4495 100644
--- a/test/core/end2end/tests/binary_metadata.c
+++ b/test/core/end2end/tests/binary_metadata.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -110,25 +110,25 @@ static void test_request_response_with_metadata_and_payload(
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
   grpc_metadata meta_c[2] = {
-      {"key1-bin",
-       "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc",
-       13,
+      {grpc_slice_from_static_string("key1-bin"),
+       grpc_slice_from_static_string(
+           "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc"),
        0,
        {{NULL, NULL, NULL, NULL}}},
-      {"key2-bin",
-       "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d",
-       14,
+      {grpc_slice_from_static_string("key2-bin"),
+       grpc_slice_from_static_string(
+           "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d"),
        0,
        {{NULL, NULL, NULL, NULL}}}};
   grpc_metadata meta_s[2] = {
-      {"key3-bin",
-       "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee",
-       15,
+      {grpc_slice_from_static_string("key3-bin"),
+       grpc_slice_from_static_string(
+           "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee"),
        0,
        {{NULL, NULL, NULL, NULL}}},
-      {"key4-bin",
-       "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff",
-       16,
+      {grpc_slice_from_static_string("key4-bin"),
+       grpc_slice_from_static_string(
+           "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"),
        0,
        {{NULL, NULL, NULL, NULL}}}};
   grpc_end2end_test_fixture f = begin_test(
@@ -144,13 +144,13 @@ static void test_request_response_with_metadata_and_payload(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -168,7 +168,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -177,12 +177,12 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -190,7 +190,6 @@ static void test_request_response_with_metadata_and_payload(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -213,7 +212,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -231,14 +230,14 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details =
+  grpc_slice status_string = grpc_slice_from_static_string(
       "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12"
       "\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24"
       "\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30\x31\x32\x33\x34\x35\x36"
@@ -253,7 +252,8 @@ static void test_request_response_with_metadata_and_payload(
       "\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8"
       "\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea"
       "\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc"
-      "\xfd\xfe\xff";
+      "\xfd\xfe\xff");
+  op->data.send_status_from_server.status_details = &status_string;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -267,24 +267,25 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(status == GRPC_STATUS_OK);
   GPR_ASSERT(
       0 ==
-      strcmp(details,
-             "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10"
-             "\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20"
-             "\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30"
-             "\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40"
-             "\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50"
-             "\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f\x60"
-             "\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70"
-             "\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f\x80"
-             "\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90"
-             "\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0"
-             "\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0"
-             "\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0"
-             "\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0"
-             "\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0"
-             "\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0"
-             "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+      grpc_slice_str_cmp(
+          details,
+          "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10"
+          "\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20"
+          "\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30"
+          "\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40"
+          "\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50"
+          "\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f\x60"
+          "\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70"
+          "\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f\x80"
+          "\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90"
+          "\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0"
+          "\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0"
+          "\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0"
+          "\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0"
+          "\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0"
+          "\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0"
+          "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
@@ -303,7 +304,7 @@ static void test_request_response_with_metadata_and_payload(
       &initial_metadata_recv, "key4-bin",
       "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/call_creds.c b/test/core/end2end/tests/call_creds.c
index 606938fff6..38cba50e12 100644
--- a/test/core/end2end/tests/call_creds.c
+++ b/test/core/end2end/tests/call_creds.c
@@ -59,7 +59,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             const char *test_name,
                                             int fail_server_auth_check) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(NULL, NULL);
   config.init_client(&f, NULL);
   if (fail_server_auth_check) {
@@ -76,7 +76,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -92,7 +92,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -156,8 +156,7 @@ static void request_response_with_payload_and_call_creds(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   grpc_call_credentials *creds = NULL;
   grpc_auth_context *s_auth_context = NULL;
@@ -167,8 +166,9 @@ static void request_response_with_payload_and_call_creds(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
   creds = grpc_google_iam_credentials_create(iam_token, iam_selector, NULL);
@@ -203,7 +203,7 @@ static void request_response_with_payload_and_call_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -212,12 +212,12 @@ static void request_response_with_payload_and_call_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -225,7 +225,6 @@ static void request_response_with_payload_and_call_creds(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -259,7 +258,7 @@ static void request_response_with_payload_and_call_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -277,14 +276,15 @@ static void request_response_with_payload_and_call_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -296,8 +296,8 @@ static void request_response_with_payload_and_call_creds(
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
@@ -337,7 +337,7 @@ static void request_response_with_payload_and_call_creds(
       break;
   }
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -391,8 +391,7 @@ static void test_request_with_server_rejecting_client_creds(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_slice request_payload_slice =
       grpc_slice_from_copied_string("hello world");
@@ -404,8 +403,9 @@ static void test_request_with_server_rejecting_client_creds(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -425,7 +425,6 @@ static void test_request_with_server_rejecting_client_creds(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -435,7 +434,7 @@ static void test_request_with_server_rejecting_client_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -444,12 +443,12 @@ static void test_request_with_server_rejecting_client_creds(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -468,7 +467,7 @@ static void test_request_with_server_rejecting_client_creds(
 
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(response_payload_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_call_destroy(c);
 
diff --git a/test/core/end2end/tests/cancel_after_accept.c b/test/core/end2end/tests/cancel_after_accept.c
index e582c59f2d..1a92aa4837 100644
--- a/test/core/end2end/tests/cancel_after_accept.c
+++ b/test/core/end2end/tests/cancel_after_accept.c
@@ -43,6 +43,7 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/service_config.h"
 
@@ -56,7 +57,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -64,7 +65,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -80,7 +81,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -118,8 +119,7 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *request_payload_recv = NULL;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_slice request_payload_slice =
@@ -154,8 +154,9 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   cq_verifier *cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/service/method",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/service/method"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -170,7 +171,6 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -180,17 +180,17 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -206,7 +206,7 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -216,7 +216,7 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -246,12 +246,16 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   grpc_byte_buffer_destroy(response_payload);
   grpc_byte_buffer_destroy(request_payload_recv);
   grpc_byte_buffer_destroy(response_payload_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_call_destroy(c);
   grpc_call_destroy(s);
 
-  if (args != NULL) grpc_channel_args_destroy(args);
+  if (args != NULL) {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   cq_verifier_destroy(cqv);
   end_test(&f);
diff --git a/test/core/end2end/tests/cancel_after_client_done.c b/test/core/end2end/tests/cancel_after_client_done.c
index 7742f9d179..0afeecb037 100644
--- a/test/core/end2end/tests/cancel_after_client_done.c
+++ b/test/core/end2end/tests/cancel_after_client_done.c
@@ -51,7 +51,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -59,7 +59,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -75,7 +75,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -113,8 +113,7 @@ static void test_cancel_after_accept_and_writes_closed(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *request_payload_recv = NULL;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_slice request_payload_slice =
@@ -128,8 +127,9 @@ static void test_cancel_after_accept_and_writes_closed(
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,7 +144,6 @@ static void test_cancel_after_accept_and_writes_closed(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -154,7 +153,7 @@ static void test_cancel_after_accept_and_writes_closed(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -163,12 +162,12 @@ static void test_cancel_after_accept_and_writes_closed(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -184,7 +183,7 @@ static void test_cancel_after_accept_and_writes_closed(
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -199,7 +198,7 @@ static void test_cancel_after_accept_and_writes_closed(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -224,7 +223,7 @@ static void test_cancel_after_accept_and_writes_closed(
   grpc_byte_buffer_destroy(response_payload);
   grpc_byte_buffer_destroy(request_payload_recv);
   grpc_byte_buffer_destroy(response_payload_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_call_destroy(c);
   grpc_call_destroy(s);
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.c
index c3c5418f20..8a96ef2f89 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.c
@@ -52,7 +52,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s/%s", test_name, config.name, mode.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s/%s", test_name, config.name,
+          mode.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +61,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +77,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -113,8 +114,7 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_slice request_payload_slice =
       grpc_slice_from_copied_string("hello world");
@@ -122,8 +122,9 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -138,7 +139,6 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -148,7 +148,7 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -157,12 +157,12 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -183,7 +183,7 @@ static void test_cancel_after_invoke(grpc_end2end_test_config config,
 
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(response_payload_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_call_destroy(c);
 
diff --git a/test/core/end2end/tests/cancel_before_invoke.c b/test/core/end2end/tests/cancel_before_invoke.c
index d4842829c0..586aa7ead3 100644
--- a/test/core/end2end/tests/cancel_before_invoke.c
+++ b/test/core/end2end/tests/cancel_before_invoke.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,8 +111,7 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_slice request_payload_slice =
       grpc_slice_from_copied_string("hello world");
@@ -120,8 +119,9 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -138,7 +138,6 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -148,7 +147,7 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -157,12 +156,12 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -181,7 +180,7 @@ static void test_cancel_before_invoke(grpc_end2end_test_config config,
 
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(response_payload_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_call_destroy(c);
 
diff --git a/test/core/end2end/tests/cancel_in_a_vacuum.c b/test/core/end2end/tests/cancel_in_a_vacuum.c
index 5be850b6ea..bc462ddcf5 100644
--- a/test/core/end2end/tests/cancel_in_a_vacuum.c
+++ b/test/core/end2end/tests/cancel_in_a_vacuum.c
@@ -51,7 +51,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -59,7 +59,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -75,7 +75,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -106,8 +106,9 @@ static void test_cancel_in_a_vacuum(grpc_end2end_test_config config,
   cq_verifier *v_client = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
diff --git a/test/core/end2end/tests/cancel_with_status.c b/test/core/end2end/tests/cancel_with_status.c
index 3aecaf7159..7d03fe5580 100644
--- a/test/core/end2end/tests/cancel_with_status.c
+++ b/test/core/end2end/tests/cancel_with_status.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -108,14 +108,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   gpr_log(GPR_DEBUG, "test with %" PRIuPTR " ops", num_ops);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -128,12 +128,11 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -156,9 +155,9 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.c
index 81fc7091f8..7dd8c112d1 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.c
@@ -48,6 +48,7 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/call_test_only.h"
+#include "src/core/lib/transport/static_metadata.h"
 #include "test/core/end2end/cq_verifier.h"
 
 static void *tag(intptr_t t) { return (void *)t; }
@@ -57,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -65,7 +66,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -81,7 +82,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -125,8 +126,7 @@ static void request_for_disabled_algorithm(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   cq_verifier *cqv;
   char str[1024];
@@ -140,15 +140,20 @@ static void request_for_disabled_algorithm(
       NULL, requested_client_compression_algorithm);
   server_args =
       grpc_channel_args_set_compression_algorithm(NULL, GRPC_COMPRESS_NONE);
-  server_args = grpc_channel_args_compression_algorithm_set_state(
-      &server_args, algorithm_to_disable, false);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    server_args = grpc_channel_args_compression_algorithm_set_state(
+        &exec_ctx, &server_args, algorithm_to_disable, false);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   f = begin_test(config, test_name, client_args, server_args);
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -170,7 +175,7 @@ static void request_for_disabled_algorithm(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = send_flags_bitmask;
   op->reserved = NULL;
   op++;
@@ -179,7 +184,7 @@ static void request_for_disabled_algorithm(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -187,7 +192,6 @@ static void request_for_disabled_algorithm(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -208,7 +212,7 @@ static void request_for_disabled_algorithm(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -241,13 +245,13 @@ static void request_for_disabled_algorithm(
   gpr_asprintf(&expected_details, "Compression algorithm '%s' is disabled.",
                algo_name);
   /* and we expect a specific reason for it */
-  GPR_ASSERT(0 == strcmp(details, expected_details));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, expected_details));
   gpr_free(expected_details);
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -262,8 +266,12 @@ static void request_for_disabled_algorithm(
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(request_payload_recv);
 
-  grpc_channel_args_destroy(client_args);
-  grpc_channel_args_destroy(server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, client_args);
+    grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   end_test(&f);
   config.tear_down_data(&f);
@@ -297,8 +305,7 @@ static void request_with_payload_template(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   cq_verifier *cqv;
   char request_str[1024];
@@ -323,8 +330,9 @@ static void request_with_payload_template(
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -346,7 +354,7 @@ static void request_with_payload_template(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -354,7 +362,6 @@ static void request_with_payload_template(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -404,12 +411,12 @@ static void request_with_payload_template(
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = request_payload;
+    op->data.send_message.send_message = request_payload;
     op->flags = client_send_flags_bitmask;
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &response_payload_recv;
+    op->data.recv_message.recv_message = &response_payload_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -419,7 +426,7 @@ static void request_with_payload_template(
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &request_payload_recv;
+    op->data.recv_message.recv_message = &request_payload_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -436,7 +443,7 @@ static void request_with_payload_template(
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = response_payload;
+    op->data.send_message.send_message = response_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -481,7 +488,8 @@ static void request_with_payload_template(
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -495,13 +503,13 @@ static void request_with_payload_template(
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -512,8 +520,12 @@ static void request_with_payload_template(
 
   cq_verifier_destroy(cqv);
 
-  grpc_channel_args_destroy(client_args);
-  grpc_channel_args_destroy(server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, client_args);
+    grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   end_test(&f);
   config.tear_down_data(&f);
@@ -557,17 +569,14 @@ static void test_invoke_request_with_compressed_payload_md_override(
   grpc_metadata gzip_compression_override;
   grpc_metadata identity_compression_override;
 
-  gzip_compression_override.key = GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY;
-  gzip_compression_override.value = "gzip";
-  gzip_compression_override.value_length =
-      strlen(gzip_compression_override.value);
+  gzip_compression_override.key = GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST;
+  gzip_compression_override.value = grpc_slice_from_static_string("gzip");
   memset(&gzip_compression_override.internal_data, 0,
          sizeof(gzip_compression_override.internal_data));
 
-  identity_compression_override.key = GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY;
-  identity_compression_override.value = "identity";
-  identity_compression_override.value_length =
-      strlen(identity_compression_override.value);
+  identity_compression_override.key = GRPC_MDSTR_GRPC_INTERNAL_ENCODING_REQUEST;
+  identity_compression_override.value =
+      grpc_slice_from_static_string("identity");
   memset(&identity_compression_override.internal_data, 0,
          sizeof(identity_compression_override.internal_data));
 
diff --git a/test/core/end2end/tests/connectivity.c b/test/core/end2end/tests/connectivity.c
index 42475c7331..979419a100 100644
--- a/test/core/end2end/tests/connectivity.c
+++ b/test/core/end2end/tests/connectivity.c
@@ -89,7 +89,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
   /* channels should start life in IDLE, and stay there */
   GPR_ASSERT(grpc_channel_check_connectivity_state(f.client, 0) ==
              GRPC_CHANNEL_IDLE);
-  gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(100));
+  gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(100));
   GPR_ASSERT(grpc_channel_check_connectivity_state(f.client, 0) ==
              GRPC_CHANNEL_IDLE);
 
@@ -106,7 +106,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
              GRPC_CHANNEL_IDLE);
   /* start watching for a change */
   grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_IDLE,
-                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        grpc_timeout_seconds_to_deadline(3),
                                         f.cq, tag(2));
 
   /* and now the watch should trigger */
@@ -118,7 +118,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
 
   /* quickly followed by a transition to TRANSIENT_FAILURE */
   grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_CONNECTING,
-                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        grpc_timeout_seconds_to_deadline(3),
                                         f.cq, tag(3));
   CQ_EXPECT_COMPLETION(cqv, tag(3), 1);
   cq_verify(cqv);
@@ -137,7 +137,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
      READY is reached */
   while (state != GRPC_CHANNEL_READY) {
     grpc_channel_watch_connectivity_state(
-        f.client, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), f.cq, tag(4));
+        f.client, state, grpc_timeout_seconds_to_deadline(3), f.cq, tag(4));
     CQ_EXPECT_COMPLETION(cqv, tag(4), 1);
     cq_verify(cqv);
     state = grpc_channel_check_connectivity_state(f.client, 0);
@@ -151,7 +151,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
   gpr_log(GPR_DEBUG, "*** SHUTTING DOWN SERVER ***");
 
   grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_READY,
-                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        grpc_timeout_seconds_to_deadline(3),
                                         f.cq, tag(5));
 
   grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
diff --git a/test/core/end2end/tests/default_host.c b/test/core/end2end/tests/default_host.c
index 208e31697e..bc1829b24b 100644
--- a/test/core/end2end/tests/default_host.c
+++ b/test/core/end2end/tests/default_host.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_client(&f, client_args);
   config.init_server(&f, server_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -110,13 +110,13 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   char *peer;
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", NULL, deadline, NULL);
+                               grpc_slice_from_static_string("/foo"), NULL,
+                               deadline, NULL);
   GPR_ASSERT(c);
 
   peer = grpc_call_get_peer(c);
@@ -141,7 +141,7 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -149,7 +149,6 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -182,7 +181,8 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -199,12 +199,12 @@ static void simple_request_body(grpc_end2end_test_fixture f) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
-  GPR_ASSERT(0 == strncmp(call_details.host, "localhost", 9));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
+  GPR_ASSERT(grpc_slice_buf_start_eq(call_details.host, "localhost", 9));
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/disappearing_server.c b/test/core/end2end/tests/disappearing_server.c
index 8ebf7e643e..05440a6f56 100644
--- a/test/core/end2end/tests/disappearing_server.c
+++ b/test/core/end2end/tests/disappearing_server.c
@@ -46,7 +46,7 @@
 static void *tag(intptr_t t) { return (void *)t; }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -93,13 +93,13 @@ static void do_request_and_shutdown_server(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -120,7 +120,7 @@ static void do_request_and_shutdown_server(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -128,7 +128,6 @@ static void do_request_and_shutdown_server(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -156,7 +155,8 @@ static void do_request_and_shutdown_server(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -174,13 +174,13 @@ static void do_request_and_shutdown_server(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -194,7 +194,8 @@ static void disappearing_server_test(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
 
-  gpr_log(GPR_INFO, "%s/%s", "disappearing_server_test", config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", "disappearing_server_test",
+          config.name);
 
   config.init_client(&f, NULL);
   config.init_server(&f, NULL);
diff --git a/test/core/end2end/tests/empty_batch.c b/test/core/end2end/tests/empty_batch.c
index dc8e52a60f..50bb6b849e 100644
--- a/test/core/end2end/tests/empty_batch.c
+++ b/test/core/end2end/tests/empty_batch.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -106,8 +106,9 @@ static void empty_batch_body(grpc_end2end_test_config config,
   grpc_op *op = NULL;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
diff --git a/test/core/end2end/tests/filter_call_init_fails.c b/test/core/end2end/tests/filter_call_init_fails.c
index 6d9351ed8c..7e189164b2 100644
--- a/test/core/end2end/tests/filter_call_init_fails.c
+++ b/test/core/end2end/tests/filter_call_init_fails.c
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -66,7 +66,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -82,7 +82,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -125,12 +125,12 @@ static void test_request(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -148,7 +148,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -157,7 +157,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -165,7 +165,6 @@ static void test_request(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -181,9 +180,9 @@ static void test_request(grpc_end2end_test_config config) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_PERMISSION_DENIED);
-  GPR_ASSERT(0 == strcmp(details, "access denied"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "access denied"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -243,7 +242,8 @@ static const grpc_channel_filter test_filter = {
  * Registration
  */
 
-static bool maybe_add_filter(grpc_channel_stack_builder *builder, void *arg) {
+static bool maybe_add_filter(grpc_exec_ctx *exec_ctx,
+                             grpc_channel_stack_builder *builder, void *arg) {
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
     // sure that all of the filters work well together.  However, we
diff --git a/test/core/end2end/tests/filter_causes_close.c b/test/core/end2end/tests/filter_causes_close.c
index 21905b98fa..308b4de71b 100644
--- a/test/core/end2end/tests/filter_causes_close.c
+++ b/test/core/end2end/tests/filter_causes_close.c
@@ -55,7 +55,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -63,7 +63,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -79,7 +79,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -121,12 +121,12 @@ static void test_request(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,7 +144,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -153,7 +153,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -161,7 +161,6 @@ static void test_request(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -177,9 +176,10 @@ static void test_request(grpc_end2end_test_config config) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_PERMISSION_DENIED);
-  GPR_ASSERT(0 == strcmp(details, "Failure that's not preventable."));
+  GPR_ASSERT(0 ==
+             grpc_slice_str_cmp(details, "Failure that's not preventable."));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -208,18 +208,12 @@ static void recv_im_ready(grpc_exec_ctx *exec_ctx, void *arg,
                           grpc_error *error) {
   grpc_call_element *elem = arg;
   call_data *calld = elem->call_data;
-  if (error == GRPC_ERROR_NONE) {
-    // close the stream with an error.
-    grpc_slice message =
-        grpc_slice_from_copied_string("Failure that's not preventable.");
-    grpc_transport_stream_op *op = grpc_make_transport_stream_op(NULL);
-    grpc_transport_stream_op_add_close(op, GRPC_STATUS_PERMISSION_DENIED,
-                                       &message);
-    grpc_call_next_op(exec_ctx, elem, op);
-  }
-  grpc_exec_ctx_sched(
+  grpc_closure_sched(
       exec_ctx, calld->recv_im_ready,
-      GRPC_ERROR_CREATE_REFERENCING("Forced call to close", &error, 1), NULL);
+      grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING(
+                             "Failure that's not preventable.", &error, 1),
+                         GRPC_ERROR_INT_GRPC_STATUS,
+                         GRPC_STATUS_PERMISSION_DENIED));
 }
 
 static void start_transport_stream_op(grpc_exec_ctx *exec_ctx,
@@ -228,7 +222,8 @@ static void start_transport_stream_op(grpc_exec_ctx *exec_ctx,
   call_data *calld = elem->call_data;
   if (op->recv_initial_metadata != NULL) {
     calld->recv_im_ready = op->recv_initial_metadata_ready;
-    op->recv_initial_metadata_ready = grpc_closure_create(recv_im_ready, elem);
+    op->recv_initial_metadata_ready =
+        grpc_closure_create(recv_im_ready, elem, grpc_schedule_on_exec_ctx);
   }
   grpc_call_next_op(exec_ctx, elem, op);
 }
@@ -270,7 +265,8 @@ static const grpc_channel_filter test_filter = {
  * Registration
  */
 
-static bool maybe_add_filter(grpc_channel_stack_builder *builder, void *arg) {
+static bool maybe_add_filter(grpc_exec_ctx *exec_ctx,
+                             grpc_channel_stack_builder *builder, void *arg) {
   if (g_enable_filter) {
     return grpc_channel_stack_builder_prepend_filter(builder, &test_filter,
                                                      NULL, NULL);
diff --git a/test/core/end2end/tests/filter_latency.c b/test/core/end2end/tests/filter_latency.c
index e10204863b..13d2ae012c 100644
--- a/test/core/end2end/tests/filter_latency.c
+++ b/test/core/end2end/tests/filter_latency.c
@@ -62,7 +62,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -70,7 +70,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -86,7 +86,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -128,8 +128,7 @@ static void test_request(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   gpr_mu_lock(&g_mu);
@@ -138,8 +137,10 @@ static void test_request(grpc_end2end_test_config config) {
   gpr_mu_unlock(&g_mu);
   const gpr_timespec start_time = gpr_now(GPR_CLOCK_MONOTONIC);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/foo", "foo.test.google.fr", deadline, NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr", config), deadline, NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -156,7 +157,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -165,7 +166,7 @@ static void test_request(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -173,7 +174,6 @@ static void test_request(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -198,7 +198,8 @@ static void test_request(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_string = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_string;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -215,9 +216,9 @@ static void test_request(grpc_end2end_test_config config) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -322,7 +323,8 @@ static const grpc_channel_filter test_server_filter = {
  * Registration
  */
 
-static bool maybe_add_filter(grpc_channel_stack_builder *builder, void *arg) {
+static bool maybe_add_filter(grpc_exec_ctx *exec_ctx,
+                             grpc_channel_stack_builder *builder, void *arg) {
   grpc_channel_filter *filter = arg;
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
diff --git a/test/core/end2end/tests/graceful_server_shutdown.c b/test/core/end2end/tests/graceful_server_shutdown.c
index 5fecadbe44..a3ad260cc2 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.c
+++ b/test/core/end2end/tests/graceful_server_shutdown.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -107,13 +107,13 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -135,7 +135,7 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -143,7 +143,6 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -171,7 +170,8 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -191,12 +191,12 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   grpc_call_destroy(s);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/high_initial_seqno.c b/test/core/end2end/tests/high_initial_seqno.c
index 01a4909ccd..cca8532b0e 100644
--- a/test/core/end2end/tests/high_initial_seqno.c
+++ b/test/core/end2end/tests/high_initial_seqno.c
@@ -54,7 +54,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -62,7 +62,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -78,7 +78,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -113,13 +113,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -140,7 +140,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -148,7 +148,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -172,7 +171,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -189,13 +189,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -233,7 +233,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
   f = begin_test(config, name, &client_args, NULL);
   for (i = 0; i < 10; i++) {
     simple_request_body(config, f);
-    gpr_log(GPR_INFO, "Passed simple request %d", i);
+    gpr_log(GPR_INFO, "Running test: Passed simple request %d", i);
   }
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/hpack_size.c b/test/core/end2end/tests/hpack_size.c
index cec8b2faae..7601722dee 100644
--- a/test/core/end2end/tests/hpack_size.c
+++ b/test/core/end2end/tests/hpack_size.c
@@ -194,7 +194,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -202,7 +202,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -218,7 +218,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -254,24 +254,24 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_status_code status;
   grpc_call_error error;
   grpc_metadata extra_metadata[3];
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   memset(extra_metadata, 0, sizeof(extra_metadata));
-  extra_metadata[0].key = "hobbit-first-name";
-  extra_metadata[0].value = hobbits[index % GPR_ARRAY_SIZE(hobbits)][0];
-  extra_metadata[0].value_length = strlen(extra_metadata[0].value);
-  extra_metadata[1].key = "hobbit-second-name";
-  extra_metadata[1].value = hobbits[index % GPR_ARRAY_SIZE(hobbits)][1];
-  extra_metadata[1].value_length = strlen(extra_metadata[1].value);
-  extra_metadata[2].key = "dragon";
-  extra_metadata[2].value = dragons[index % GPR_ARRAY_SIZE(dragons)];
-  extra_metadata[2].value_length = strlen(extra_metadata[2].value);
+  extra_metadata[0].key = grpc_slice_from_static_string("hobbit-first-name");
+  extra_metadata[0].value = grpc_slice_from_static_string(
+      hobbits[index % GPR_ARRAY_SIZE(hobbits)][0]);
+  extra_metadata[1].key = grpc_slice_from_static_string("hobbit-second-name");
+  extra_metadata[1].value = grpc_slice_from_static_string(
+      hobbits[index % GPR_ARRAY_SIZE(hobbits)][1]);
+  extra_metadata[2].key = grpc_slice_from_static_string("dragon");
+  extra_metadata[2].value =
+      grpc_slice_from_static_string(dragons[index % GPR_ARRAY_SIZE(dragons)]);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -293,7 +293,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -301,7 +301,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -325,7 +324,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -342,13 +342,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/idempotent_request.c b/test/core/end2end/tests/idempotent_request.c
index 4f6d3bb808..cef2e100be 100644
--- a/test/core/end2end/tests/idempotent_request.c
+++ b/test/core/end2end/tests/idempotent_request.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,14 +111,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   char *peer;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,7 +144,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -152,7 +152,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -185,7 +184,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -202,14 +202,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.c
index 24abfa2ea0..d799bd8ccf 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.c
@@ -51,7 +51,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -59,7 +59,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static void drain_cq(grpc_completion_queue *cq) {
@@ -73,7 +73,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -140,13 +140,13 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -163,7 +163,7 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -172,12 +172,12 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -185,7 +185,6 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -207,7 +206,7 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -225,14 +224,15 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -244,13 +244,13 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/large_metadata.c b/test/core/end2end/tests/large_metadata.c
index 69b4b24b06..ac4c0e7f3b 100644
--- a/test/core/end2end/tests/large_metadata.c
+++ b/test/core/end2end/tests/large_metadata.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -122,21 +122,19 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
-  meta.key = "key";
-  meta.value = gpr_malloc(large_size + 1);
-  memset((char *)meta.value, 'a', large_size);
-  ((char *)meta.value)[large_size] = 0;
-  meta.value_length = large_size;
+  meta.key = grpc_slice_from_static_string("key");
+  meta.value = grpc_slice_malloc(large_size);
+  memset(GRPC_SLICE_START_PTR(meta.value), 'a', large_size);
 
   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
@@ -153,7 +151,7 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -162,7 +160,7 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -170,7 +168,6 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -194,7 +191,7 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -216,7 +213,8 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -228,15 +226,17 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
-  GPR_ASSERT(contains_metadata(&request_metadata_recv, "key", meta.value));
+  GPR_ASSERT(contains_metadata_slices(&request_metadata_recv,
+                                      grpc_slice_from_static_string("key"),
+                                      meta.value));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -250,7 +250,7 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(request_payload_recv);
 
-  gpr_free((char *)meta.value);
+  grpc_slice_unref(meta.value);
 
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/load_reporting_hook.c b/test/core/end2end/tests/load_reporting_hook.c
index 5b75f26bd2..085a563fb8 100644
--- a/test/core/end2end/tests/load_reporting_hook.c
+++ b/test/core/end2end/tests/load_reporting_hook.c
@@ -74,7 +74,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
 
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
@@ -84,7 +84,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -100,7 +100,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -146,13 +146,13 @@ static void request_response_with_payload(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, method_name,
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string(method_name),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -171,7 +171,7 @@ static void request_response_with_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -180,12 +180,12 @@ static void request_response_with_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -193,7 +193,6 @@ static void request_response_with_payload(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -215,7 +214,7 @@ static void request_response_with_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -233,7 +232,7 @@ static void request_response_with_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -242,7 +241,8 @@ static void request_response_with_payload(
   op->data.send_status_from_server.trailing_metadata_count = 1;
   op->data.send_status_from_server.trailing_metadata = trailing_lr_metadata;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -255,7 +255,7 @@ static void request_response_with_payload(
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -295,15 +295,13 @@ static void test_load_reporting_hook(grpc_end2end_test_config config) {
   grpc_metadata initial_lr_metadata;
   grpc_metadata trailing_lr_metadata;
 
-  initial_lr_metadata.key = GRPC_LB_TOKEN_MD_KEY;
-  initial_lr_metadata.value = "client-token";
-  initial_lr_metadata.value_length = strlen(initial_lr_metadata.value);
+  initial_lr_metadata.key = GRPC_MDSTR_LB_TOKEN;
+  initial_lr_metadata.value = grpc_slice_from_static_string("client-token");
   memset(&initial_lr_metadata.internal_data, 0,
          sizeof(initial_lr_metadata.internal_data));
 
-  trailing_lr_metadata.key = GRPC_LB_COST_MD_KEY;
-  trailing_lr_metadata.value = "server-token";
-  trailing_lr_metadata.value_length = strlen(trailing_lr_metadata.value);
+  trailing_lr_metadata.key = GRPC_MDSTR_LB_COST_BIN;
+  trailing_lr_metadata.value = grpc_slice_from_static_string("server-token");
   memset(&trailing_lr_metadata.internal_data, 0,
          sizeof(trailing_lr_metadata.internal_data));
 
@@ -311,7 +309,11 @@ static void test_load_reporting_hook(grpc_end2end_test_config config) {
                                 response_msg, &initial_lr_metadata,
                                 &trailing_lr_metadata);
   end_test(&f);
-  grpc_channel_args_destroy(lr_server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, lr_server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   config.tear_down_data(&f);
 }
 
diff --git a/test/core/end2end/tests/max_concurrent_streams.c b/test/core/end2end/tests/max_concurrent_streams.c
index 9338bc5f0d..e81a628944 100644
--- a/test/core/end2end/tests/max_concurrent_streams.c
+++ b/test/core/end2end/tests/max_concurrent_streams.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -109,13 +109,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -136,7 +136,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -144,7 +144,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -168,7 +167,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -185,13 +185,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -223,11 +223,9 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   grpc_metadata_array trailing_metadata_recv2;
   grpc_status_code status1;
   grpc_call_error error;
-  char *details1 = NULL;
-  size_t details_capacity1 = 0;
+  grpc_slice details1;
   grpc_status_code status2;
-  char *details2 = NULL;
-  size_t details_capacity2 = 0;
+  grpc_slice details2;
   grpc_op ops[6];
   grpc_op *op;
   int was_cancelled;
@@ -261,13 +259,15 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
      the first completes */
   deadline = n_seconds_time(1000);
   c1 = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/alpha",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/alpha"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c1);
   c2 = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/beta",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/beta"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c2);
 
@@ -295,12 +295,12 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
   op->data.recv_status_on_client.status = &status1;
   op->data.recv_status_on_client.status_details = &details1;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity1;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv1;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv1;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -327,12 +327,12 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
   op->data.recv_status_on_client.status = &status2;
   op->data.recv_status_on_client.status_details = &details2;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity2;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv1;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv1;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -343,7 +343,7 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   got_server_start = 0;
   live_call = -1;
   while (!got_client_start || !got_server_start) {
-    ev = grpc_completion_queue_next(f.cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+    ev = grpc_completion_queue_next(f.cq, grpc_timeout_seconds_to_deadline(3),
                                     NULL);
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
     GPR_ASSERT(ev.success);
@@ -378,7 +378,8 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -392,6 +393,8 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   CQ_EXPECT_COMPLETION(cqv, tag(live_call + 1), 1);
   cq_verify(cqv);
 
+  grpc_call_details_destroy(&call_details);
+
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
                                  f.server, &s2, &call_details,
                                  &request_metadata_recv, f.cq, f.cq, tag(201)));
@@ -413,7 +416,7 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -431,8 +434,394 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   grpc_call_destroy(c2);
   grpc_call_destroy(s2);
 
-  gpr_free(details1);
-  gpr_free(details2);
+  grpc_slice_unref(details1);
+  grpc_slice_unref(details2);
+  grpc_metadata_array_destroy(&initial_metadata_recv1);
+  grpc_metadata_array_destroy(&trailing_metadata_recv1);
+  grpc_metadata_array_destroy(&initial_metadata_recv2);
+  grpc_metadata_array_destroy(&trailing_metadata_recv2);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+static void test_max_concurrent_streams_with_timeout_on_first(
+    grpc_end2end_test_config config) {
+  grpc_end2end_test_fixture f;
+  grpc_arg server_arg;
+  grpc_channel_args server_args;
+  grpc_call *c1;
+  grpc_call *c2;
+  grpc_call *s1;
+  grpc_call *s2;
+  cq_verifier *cqv;
+  grpc_call_details call_details;
+  grpc_metadata_array request_metadata_recv;
+  grpc_metadata_array initial_metadata_recv1;
+  grpc_metadata_array trailing_metadata_recv1;
+  grpc_metadata_array initial_metadata_recv2;
+  grpc_metadata_array trailing_metadata_recv2;
+  grpc_status_code status1;
+  grpc_call_error error;
+  grpc_slice details1 = grpc_empty_slice();
+  grpc_status_code status2;
+  grpc_slice details2 = grpc_empty_slice();
+  grpc_op ops[6];
+  grpc_op *op;
+  int was_cancelled;
+
+  server_arg.key = GRPC_ARG_MAX_CONCURRENT_STREAMS;
+  server_arg.type = GRPC_ARG_INTEGER;
+  server_arg.value.integer = 1;
+
+  server_args.num_args = 1;
+  server_args.args = &server_arg;
+
+  f = begin_test(config, "test_max_concurrent_streams_with_timeout_on_first",
+                 NULL, &server_args);
+  cqv = cq_verifier_create(f.cq);
+
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_metadata_array_init(&initial_metadata_recv1);
+  grpc_metadata_array_init(&trailing_metadata_recv1);
+  grpc_metadata_array_init(&initial_metadata_recv2);
+  grpc_metadata_array_init(&trailing_metadata_recv2);
+  grpc_call_details_init(&call_details);
+
+  /* perform a ping-pong to ensure that settings have had a chance to round
+     trip */
+  simple_request_body(config, f);
+  /* perform another one to make sure that the one stream case still works */
+  simple_request_body(config, f);
+
+  /* start two requests - ensuring that the second is not accepted until
+     the first completes */
+  c1 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/alpha"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
+      n_seconds_time(3), NULL);
+  GPR_ASSERT(c1);
+  c2 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/beta"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
+      n_seconds_time(1000), NULL);
+  GPR_ASSERT(c2);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s1, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
+  op->data.recv_status_on_client.status = &status1;
+  op->data.recv_status_on_client.status_details = &details1;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv1;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(301), 1);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
+  op->data.recv_status_on_client.status = &status2;
+  op->data.recv_status_on_client.status_details = &details2;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv2;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(402), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  grpc_call_details_destroy(&call_details);
+  grpc_call_details_init(&call_details);
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s2, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(201)));
+
+  CQ_EXPECT_COMPLETION(cqv, tag(302), 1);
+  /* first request is finished, we should be able to start the second */
+  CQ_EXPECT_COMPLETION(cqv, tag(401), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(201), 1);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s2, ops, (size_t)(op - ops), tag(202), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(402), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(202), 1);
+  cq_verify(cqv);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_call_destroy(c1);
+  grpc_call_destroy(s1);
+  grpc_call_destroy(c2);
+  grpc_call_destroy(s2);
+
+  grpc_slice_unref(details1);
+  grpc_slice_unref(details2);
+  grpc_metadata_array_destroy(&initial_metadata_recv1);
+  grpc_metadata_array_destroy(&trailing_metadata_recv1);
+  grpc_metadata_array_destroy(&initial_metadata_recv2);
+  grpc_metadata_array_destroy(&trailing_metadata_recv2);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+static void test_max_concurrent_streams_with_timeout_on_second(
+    grpc_end2end_test_config config) {
+  grpc_end2end_test_fixture f;
+  grpc_arg server_arg;
+  grpc_channel_args server_args;
+  grpc_call *c1;
+  grpc_call *c2;
+  grpc_call *s1;
+  cq_verifier *cqv;
+  grpc_call_details call_details;
+  grpc_metadata_array request_metadata_recv;
+  grpc_metadata_array initial_metadata_recv1;
+  grpc_metadata_array trailing_metadata_recv1;
+  grpc_metadata_array initial_metadata_recv2;
+  grpc_metadata_array trailing_metadata_recv2;
+  grpc_status_code status1;
+  grpc_call_error error;
+  grpc_slice details1 = grpc_empty_slice();
+  grpc_status_code status2;
+  grpc_slice details2 = grpc_empty_slice();
+  grpc_op ops[6];
+  grpc_op *op;
+  int was_cancelled;
+
+  server_arg.key = GRPC_ARG_MAX_CONCURRENT_STREAMS;
+  server_arg.type = GRPC_ARG_INTEGER;
+  server_arg.value.integer = 1;
+
+  server_args.num_args = 1;
+  server_args.args = &server_arg;
+
+  f = begin_test(config, "test_max_concurrent_streams_with_timeout_on_second",
+                 NULL, &server_args);
+  cqv = cq_verifier_create(f.cq);
+
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_metadata_array_init(&initial_metadata_recv1);
+  grpc_metadata_array_init(&trailing_metadata_recv1);
+  grpc_metadata_array_init(&initial_metadata_recv2);
+  grpc_metadata_array_init(&trailing_metadata_recv2);
+  grpc_call_details_init(&call_details);
+
+  /* perform a ping-pong to ensure that settings have had a chance to round
+     trip */
+  simple_request_body(config, f);
+  /* perform another one to make sure that the one stream case still works */
+  simple_request_body(config, f);
+
+  /* start two requests - ensuring that the second is not accepted until
+     the first completes , and the second request will timeout in the
+     concurrent_list */
+  c1 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/alpha"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
+      n_seconds_time(1000), NULL);
+  GPR_ASSERT(c1);
+  c2 = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/beta"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
+      n_seconds_time(3), NULL);
+  GPR_ASSERT(c2);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s1, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv1;
+  op->data.recv_status_on_client.status = &status1;
+  op->data.recv_status_on_client.status_details = &details1;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv1;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(301), 1);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv2;
+  op->data.recv_status_on_client.status = &status2;
+  op->data.recv_status_on_client.status_details = &details2;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv2;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(402), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  /* the second request is time out*/
+  CQ_EXPECT_COMPLETION(cqv, tag(401), 0);
+  CQ_EXPECT_COMPLETION(cqv, tag(402), 1);
+  cq_verify(cqv);
+
+  /* second request is finished because of time out, so destroy the second call
+   */
+  grpc_call_destroy(c2);
+
+  /* now reply the first call */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s1, ops, (size_t)(op - ops), tag(102), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(302), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
+  cq_verify(cqv);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_call_destroy(c1);
+  grpc_call_destroy(s1);
+
+  grpc_slice_unref(details1);
+  grpc_slice_unref(details2);
   grpc_metadata_array_destroy(&initial_metadata_recv1);
   grpc_metadata_array_destroy(&trailing_metadata_recv1);
   grpc_metadata_array_destroy(&initial_metadata_recv2);
@@ -445,6 +834,8 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
 }
 
 void max_concurrent_streams(grpc_end2end_test_config config) {
+  test_max_concurrent_streams_with_timeout_on_first(config);
+  test_max_concurrent_streams_with_timeout_on_second(config);
   test_max_concurrent_streams(config);
 }
 
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.c
index c222d9dfae..b15d30f58c 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.c
@@ -43,6 +43,7 @@
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/service_config.h"
 
@@ -55,7 +56,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   // We intentionally do not pass the client and server args to
   // create_fixture(), since we don't want the limit enforced on the
   // proxy, only on the backend server.
@@ -66,7 +67,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -82,7 +83,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -108,9 +109,12 @@ static void end_test(grpc_end2end_test_fixture *f) {
 // recv limit on server.
 static void test_max_message_length_on_request(grpc_end2end_test_config config,
                                                bool send_limit,
-                                               bool use_service_config) {
-  gpr_log(GPR_INFO, "testing request with send_limit=%d use_service_config=%d",
-          send_limit, use_service_config);
+                                               bool use_service_config,
+                                               bool use_string_json_value) {
+  gpr_log(GPR_INFO,
+          "testing request with send_limit=%d use_service_config=%d "
+          "use_string_json_value=%d",
+          send_limit, use_service_config, use_string_json_value);
 
   grpc_end2end_test_fixture f;
   grpc_call *c = NULL;
@@ -129,8 +133,7 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   grpc_channel_args *client_args = NULL;
@@ -142,14 +145,23 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
     arg.type = GRPC_ARG_STRING;
     arg.key = GRPC_ARG_SERVICE_CONFIG;
     arg.value.string =
-        "{\n"
-        "  \"methodConfig\": [ {\n"
-        "    \"name\": [\n"
-        "      { \"service\": \"service\", \"method\": \"method\" }\n"
-        "    ],\n"
-        "    \"maxRequestMessageBytes\": \"5\"\n"
-        "  } ]\n"
-        "}";
+        use_string_json_value
+            ? "{\n"
+              "  \"methodConfig\": [ {\n"
+              "    \"name\": [\n"
+              "      { \"service\": \"service\", \"method\": \"method\" }\n"
+              "    ],\n"
+              "    \"maxRequestMessageBytes\": \"5\"\n"
+              "  } ]\n"
+              "}"
+            : "{\n"
+              "  \"methodConfig\": [ {\n"
+              "    \"name\": [\n"
+              "      { \"service\": \"service\", \"method\": \"method\" }\n"
+              "    ],\n"
+              "    \"maxRequestMessageBytes\": 5\n"
+              "  } ]\n"
+              "}";
     client_args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   } else {
     // Set limit via channel args.
@@ -168,14 +180,19 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
 
   f = begin_test(config, "test_max_request_message_length", client_args,
                  server_args);
-  if (client_args != NULL) grpc_channel_args_destroy(client_args);
-  if (server_args != NULL) grpc_channel_args_destroy(server_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    if (client_args != NULL) grpc_channel_args_destroy(&exec_ctx, client_args);
+    if (server_args != NULL) grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/service/method",
-      get_host_override_string("foo.test.google.fr:1234", config),
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/service/method"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
       gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(c);
 
@@ -192,7 +209,7 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -201,7 +218,7 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -209,7 +226,6 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -237,7 +253,7 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &recv_payload;
+  op->data.recv_message.recv_message = &recv_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -248,19 +264,20 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
   cq_verify(cqv);
 
-  GPR_ASSERT(0 == strcmp(call_details.method, "/service/method"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/service/method"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
 done:
   GPR_ASSERT(status == GRPC_STATUS_INVALID_ARGUMENT);
-  GPR_ASSERT(strcmp(details,
-                    send_limit
-                        ? "Sent message larger than max (11 vs. 5)"
-                        : "Received message larger than max (11 vs. 5)") == 0);
+  GPR_ASSERT(
+      grpc_slice_str_cmp(
+          details, send_limit
+                       ? "Sent message larger than max (11 vs. 5)"
+                       : "Received message larger than max (11 vs. 5)") == 0);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -282,9 +299,12 @@ done:
 // recv limit on client.
 static void test_max_message_length_on_response(grpc_end2end_test_config config,
                                                 bool send_limit,
-                                                bool use_service_config) {
-  gpr_log(GPR_INFO, "testing response with send_limit=%d use_service_config=%d",
-          send_limit, use_service_config);
+                                                bool use_service_config,
+                                                bool use_string_json_value) {
+  gpr_log(GPR_INFO,
+          "testing response with send_limit=%d use_service_config=%d "
+          "use_string_json_value=%d",
+          send_limit, use_service_config, use_string_json_value);
 
   grpc_end2end_test_fixture f;
   grpc_call *c = NULL;
@@ -303,8 +323,7 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   grpc_channel_args *client_args = NULL;
@@ -316,14 +335,23 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
     arg.type = GRPC_ARG_STRING;
     arg.key = GRPC_ARG_SERVICE_CONFIG;
     arg.value.string =
-        "{\n"
-        "  \"methodConfig\": [ {\n"
-        "    \"name\": [\n"
-        "      { \"service\": \"service\", \"method\": \"method\" }\n"
-        "    ],\n"
-        "    \"maxResponseMessageBytes\": \"5\"\n"
-        "  } ]\n"
-        "}";
+        use_string_json_value
+            ? "{\n"
+              "  \"methodConfig\": [ {\n"
+              "    \"name\": [\n"
+              "      { \"service\": \"service\", \"method\": \"method\" }\n"
+              "    ],\n"
+              "    \"maxResponseMessageBytes\": \"5\"\n"
+              "  } ]\n"
+              "}"
+            : "{\n"
+              "  \"methodConfig\": [ {\n"
+              "    \"name\": [\n"
+              "      { \"service\": \"service\", \"method\": \"method\" }\n"
+              "    ],\n"
+              "    \"maxResponseMessageBytes\": 5\n"
+              "  } ]\n"
+              "}";
     client_args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   } else {
     // Set limit via channel args.
@@ -342,14 +370,19 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
 
   f = begin_test(config, "test_max_response_message_length", client_args,
                  server_args);
-  if (client_args != NULL) grpc_channel_args_destroy(client_args);
-  if (server_args != NULL) grpc_channel_args_destroy(server_args);
-
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    if (client_args != NULL) grpc_channel_args_destroy(&exec_ctx, client_args);
+    if (server_args != NULL) grpc_channel_args_destroy(&exec_ctx, server_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   cqv = cq_verifier_create(f.cq);
 
-  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
-                               "/service/method", "foo.test.google.fr:1234",
-                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/service/method"),
+      get_host_override_slice("foo.test.google.fr:1234", config),
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
@@ -369,12 +402,12 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &recv_payload;
+  op->data.recv_message.recv_message = &recv_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -382,7 +415,6 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -409,14 +441,15 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -427,16 +460,18 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
   cq_verify(cqv);
 
-  GPR_ASSERT(0 == strcmp(call_details.method, "/service/method"));
-  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/service/method"));
+  GPR_ASSERT(0 ==
+             grpc_slice_str_cmp(call_details.host, "foo.test.google.fr:1234"));
 
   GPR_ASSERT(status == GRPC_STATUS_INVALID_ARGUMENT);
-  GPR_ASSERT(strcmp(details,
-                    send_limit
-                        ? "Sent message larger than max (11 vs. 5)"
-                        : "Received message larger than max (11 vs. 5)") == 0);
+  GPR_ASSERT(
+      grpc_slice_str_cmp(
+          details, send_limit
+                       ? "Sent message larger than max (11 vs. 5)"
+                       : "Received message larger than max (11 vs. 5)") == 0);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -455,17 +490,29 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
 
 void max_message_length(grpc_end2end_test_config config) {
   test_max_message_length_on_request(config, false /* send_limit */,
-                                     false /* use_service_config */);
+                                     false /* use_service_config */,
+                                     false /* use_string_json_value */);
   test_max_message_length_on_request(config, true /* send_limit */,
-                                     false /* use_service_config */);
+                                     false /* use_service_config */,
+                                     false /* use_string_json_value */);
   test_max_message_length_on_response(config, false /* send_limit */,
-                                      false /* use_service_config */);
+                                      false /* use_service_config */,
+                                      false /* use_string_json_value */);
   test_max_message_length_on_response(config, true /* send_limit */,
-                                      false /* use_service_config */);
+                                      false /* use_service_config */,
+                                      false /* use_string_json_value */);
+  test_max_message_length_on_request(config, true /* send_limit */,
+                                     true /* use_service_config */,
+                                     false /* use_string_json_value */);
   test_max_message_length_on_request(config, true /* send_limit */,
-                                     true /* use_service_config */);
+                                     true /* use_service_config */,
+                                     true /* use_string_json_value */);
+  test_max_message_length_on_response(config, false /* send_limit */,
+                                      true /* use_service_config */,
+                                      false /* use_string_json_value */);
   test_max_message_length_on_response(config, false /* send_limit */,
-                                      true /* use_service_config */);
+                                      true /* use_service_config */,
+                                      true /* use_string_json_value */);
 }
 
 void max_message_length_pre_init(void) {}
diff --git a/test/core/end2end/tests/negative_deadline.c b/test/core/end2end/tests/negative_deadline.c
index 929777d39e..0b61efbac9 100644
--- a/test/core/end2end/tests/negative_deadline.c
+++ b/test/core/end2end/tests/negative_deadline.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -108,14 +108,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
 
   gpr_log(GPR_DEBUG, "test with %" PRIuPTR " ops", num_ops);
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -128,12 +128,11 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -155,7 +154,7 @@ static void simple_request_body(grpc_end2end_test_config config,
 
   GPR_ASSERT(status == GRPC_STATUS_DEADLINE_EXCEEDED);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
index 2ebda2ccb8..9cef02b2b3 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.c
@@ -53,7 +53,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -61,7 +61,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(500); }
@@ -77,7 +77,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -119,13 +119,13 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -142,7 +142,7 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -151,7 +151,7 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -159,7 +159,6 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -179,7 +178,7 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -201,7 +200,8 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -214,11 +214,11 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
 
   // Expected behavior of a RPC when network is lost.
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/no_logging.c b/test/core/end2end/tests/no_logging.c
index 54614cb029..56e48a88a8 100644
--- a/test/core/end2end/tests/no_logging.c
+++ b/test/core/end2end/tests/no_logging.c
@@ -80,7 +80,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -88,7 +88,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -104,7 +104,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -139,14 +139,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   char *peer;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -171,7 +171,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -179,7 +179,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -210,7 +209,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -227,14 +227,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(0 == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/no_op.c b/test/core/end2end/tests/no_op.c
index 8b29c219dc..62fc728c3e 100644
--- a/test/core/end2end/tests/no_op.c
+++ b/test/core/end2end/tests/no_op.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
diff --git a/test/core/end2end/tests/payload.c b/test/core/end2end/tests/payload.c
index 4a88c5f2a8..b04ee5705c 100644
--- a/test/core/end2end/tests/payload.c
+++ b/test/core/end2end/tests/payload.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -138,13 +138,13 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -161,7 +161,7 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -170,12 +170,12 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -183,7 +183,6 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -205,7 +204,7 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -223,14 +222,15 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -242,8 +242,8 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
@@ -251,7 +251,7 @@ static void request_response_with_payload(grpc_end2end_test_config config,
   GPR_ASSERT(
       byte_buffer_eq_slice(response_payload_recv, response_payload_slice));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/ping.c b/test/core/end2end/tests/ping.c
index 5e5169dedc..f5bfac2255 100644
--- a/test/core/end2end/tests/ping.c
+++ b/test/core/end2end/tests/ping.c
@@ -37,6 +37,7 @@
 #include <grpc/support/sync.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
+#include <grpc/support/useful.h>
 
 #include "test/core/end2end/cq_verifier.h"
 
@@ -48,7 +49,15 @@ static void test_ping(grpc_end2end_test_config config) {
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   int i;
 
-  config.init_client(&f, NULL);
+  grpc_arg a[] = {{.type = GRPC_ARG_INTEGER,
+                   .key = GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS,
+                   .value.integer = 0},
+                  {.type = GRPC_ARG_INTEGER,
+                   .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
+                   .value.integer = 20}};
+  grpc_channel_args client_args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+
+  config.init_client(&f, &client_args);
   config.init_server(&f, NULL);
 
   grpc_channel_ping(f.client, f.cq, tag(0), NULL);
@@ -61,7 +70,7 @@ static void test_ping(grpc_end2end_test_config config) {
      READY is reached */
   while (state != GRPC_CHANNEL_READY) {
     grpc_channel_watch_connectivity_state(
-        f.client, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), f.cq, tag(99));
+        f.client, state, grpc_timeout_seconds_to_deadline(3), f.cq, tag(99));
     CQ_EXPECT_COMPLETION(cqv, tag(99), 1);
     cq_verify(cqv);
     state = grpc_channel_check_connectivity_state(f.client, 0);
diff --git a/test/core/end2end/tests/ping_pong_streaming.c b/test/core/end2end/tests/ping_pong_streaming.c
index 0a1566e9c2..848f76018d 100644
--- a/test/core/end2end/tests/ping_pong_streaming.c
+++ b/test/core/end2end/tests/ping_pong_streaming.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -112,8 +112,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   grpc_byte_buffer *request_payload;
   grpc_byte_buffer *request_payload_recv;
@@ -126,8 +125,9 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
       grpc_slice_from_copied_string("hello you");
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,7 +144,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -152,7 +152,6 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -188,12 +187,12 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = request_payload;
+    op->data.send_message.send_message = request_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &response_payload_recv;
+    op->data.recv_message.recv_message = &response_payload_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -203,7 +202,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &request_payload_recv;
+    op->data.recv_message.recv_message = &request_payload_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -215,7 +214,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = response_payload;
+    op->data.send_message.send_message = response_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -248,7 +247,8 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -270,7 +270,7 @@ static void test_pingpong_streaming(grpc_end2end_test_config config,
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/registered_call.c b/test/core/end2end/tests/registered_call.c
index 6594b420b9..9c8ce89c83 100644
--- a/test/core/end2end/tests/registered_call.c
+++ b/test/core/end2end/tests/registered_call.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,8 +111,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_registered_call(
@@ -136,7 +135,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -144,7 +143,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -168,7 +166,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -185,13 +184,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/request_with_flags.c b/test/core/end2end/tests/request_with_flags.c
index 9c18e155f3..329359e08b 100644
--- a/test/core/end2end/tests/request_with_flags.c
+++ b/test/core/end2end/tests/request_with_flags.c
@@ -51,7 +51,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -59,7 +59,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -75,7 +75,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -117,13 +117,13 @@ static void test_invoke_request_with_flags(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_call_error expectation;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -140,7 +140,7 @@ static void test_invoke_request_with_flags(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = flags_for_op[op->op];
   op->reserved = NULL;
   op++;
@@ -149,7 +149,7 @@ static void test_invoke_request_with_flags(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = flags_for_op[op->op];
   op->reserved = NULL;
   op++;
@@ -157,7 +157,6 @@ static void test_invoke_request_with_flags(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = flags_for_op[op->op];
   op->reserved = NULL;
   op++;
@@ -168,9 +167,9 @@ static void test_invoke_request_with_flags(
   if (expectation == GRPC_CALL_OK) {
     CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
     cq_verify(cqv);
+    grpc_slice_unref(details);
   }
 
-  gpr_free(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/request_with_payload.c b/test/core/end2end/tests/request_with_payload.c
index c84e3ac5b5..f71f92bbb8 100644
--- a/test/core/end2end/tests/request_with_payload.c
+++ b/test/core/end2end/tests/request_with_payload.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -116,13 +116,13 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -139,7 +139,7 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -148,7 +148,7 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -156,7 +156,6 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -177,7 +176,7 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -197,7 +196,8 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -209,14 +209,14 @@ static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/resource_quota_server.c b/test/core/end2end/tests/resource_quota_server.c
index c919faea89..4f9ed7a3a1 100644
--- a/test/core/end2end/tests/resource_quota_server.c
+++ b/test/core/end2end/tests/resource_quota_server.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -149,8 +149,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
   grpc_call_details *call_details =
       malloc(sizeof(grpc_call_details) * NUM_CALLS);
   grpc_status_code *status = malloc(sizeof(grpc_status_code) * NUM_CALLS);
-  char **details = malloc(sizeof(char *) * NUM_CALLS);
-  size_t *details_capacity = malloc(sizeof(size_t) * NUM_CALLS);
+  grpc_slice *details = malloc(sizeof(grpc_slice) * NUM_CALLS);
   grpc_byte_buffer **request_payload_recv =
       malloc(sizeof(grpc_byte_buffer *) * NUM_CALLS);
   int *was_cancelled = malloc(sizeof(int) * NUM_CALLS);
@@ -161,6 +160,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
   int pending_server_end_calls = 0;
   int cancelled_calls_on_client = 0;
   int cancelled_calls_on_server = 0;
+  int deadline_exceeded = 0;
 
   grpc_byte_buffer *request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
@@ -173,8 +173,6 @@ void resource_quota_server(grpc_end2end_test_config config) {
     grpc_metadata_array_init(&trailing_metadata_recv[i]);
     grpc_metadata_array_init(&request_metadata_recv[i]);
     grpc_call_details_init(&call_details[i]);
-    details[i] = NULL;
-    details_capacity[i] = 0;
     request_payload_recv[i] = NULL;
     was_cancelled[i] = 0;
   }
@@ -190,8 +188,10 @@ void resource_quota_server(grpc_end2end_test_config config) {
 
   for (int i = 0; i < NUM_CALLS; i++) {
     client_calls[i] = grpc_channel_create_call(
-        f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-        "foo.test.google.fr", n_seconds_time(60), NULL);
+        f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+        grpc_slice_from_static_string("/foo"),
+        get_host_override_slice("foo.test.google.fr", config),
+        n_seconds_time(60), NULL);
 
     memset(ops, 0, sizeof(ops));
     op = ops;
@@ -201,7 +201,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = request_payload;
+    op->data.send_message.send_message = request_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -210,7 +210,8 @@ void resource_quota_server(grpc_end2end_test_config config) {
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_RECV_INITIAL_METADATA;
-    op->data.recv_initial_metadata = &initial_metadata_recv[i];
+    op->data.recv_initial_metadata.recv_initial_metadata =
+        &initial_metadata_recv[i];
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -219,8 +220,6 @@ void resource_quota_server(grpc_end2end_test_config config) {
         &trailing_metadata_recv[i];
     op->data.recv_status_on_client.status = &status[i];
     op->data.recv_status_on_client.status_details = &details[i];
-    op->data.recv_status_on_client.status_details_capacity =
-        &details_capacity[i];
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -249,6 +248,9 @@ void resource_quota_server(grpc_end2end_test_config config) {
         case GRPC_STATUS_RESOURCE_EXHAUSTED:
           cancelled_calls_on_client++;
           break;
+        case GRPC_STATUS_DEADLINE_EXCEEDED:
+          deadline_exceeded++;
+          break;
         case GRPC_STATUS_OK:
           break;
         default:
@@ -260,7 +262,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
       grpc_metadata_array_destroy(&initial_metadata_recv[call_id]);
       grpc_metadata_array_destroy(&trailing_metadata_recv[call_id]);
       grpc_call_destroy(client_calls[call_id]);
-      gpr_free(details[call_id]);
+      grpc_slice_unref(details[call_id]);
 
       pending_client_calls--;
     } else if (ev_tag < SERVER_RECV_BASE_TAG) {
@@ -277,7 +279,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
       op->reserved = NULL;
       op++;
       op->op = GRPC_OP_RECV_MESSAGE;
-      op->data.recv_message = &request_payload_recv[call_id];
+      op->data.recv_message.recv_message = &request_payload_recv[call_id];
       op->flags = 0;
       op->reserved = NULL;
       op++;
@@ -317,7 +319,8 @@ void resource_quota_server(grpc_end2end_test_config config) {
       op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
       op->data.send_status_from_server.trailing_metadata_count = 0;
       op->data.send_status_from_server.status = GRPC_STATUS_OK;
-      op->data.send_status_from_server.status_details = "xyz";
+      grpc_slice status_details = grpc_slice_from_static_string("xyz");
+      op->data.send_status_from_server.status_details = &status_details;
       op->flags = 0;
       op->reserved = NULL;
       op++;
@@ -344,24 +347,19 @@ void resource_quota_server(grpc_end2end_test_config config) {
     }
   }
 
-  gpr_log(
-      GPR_INFO,
-      "Done. %d total calls: %d cancelled at server, %d cancelled at client.",
-      NUM_CALLS, cancelled_calls_on_server, cancelled_calls_on_client);
-
-  /* The call may be cancelled after the server has sent its status but before
-   * the client has received it. This means that we should see strictly more
-   * failures on the client than on the server. */
-  GPR_ASSERT(cancelled_calls_on_client >= cancelled_calls_on_server);
-  /* However, we shouldn't see radically more... 0.9 is a guessed bound on what
-   * we'd want that ratio to be... to at least trigger some investigation should
-   * that ratio become much higher. */
-  GPR_ASSERT(cancelled_calls_on_server >= 0.9 * cancelled_calls_on_client);
+  gpr_log(GPR_INFO,
+          "Done. %d total calls: %d cancelled at server, %d cancelled at "
+          "client, %d timed out.",
+          NUM_CALLS, cancelled_calls_on_server, cancelled_calls_on_client,
+          deadline_exceeded);
 
   grpc_byte_buffer_destroy(request_payload);
   grpc_slice_unref(request_payload_slice);
   grpc_resource_quota_unref(resource_quota);
 
+  end_test(&f);
+  config.tear_down_data(&f);
+
   free(client_calls);
   free(server_calls);
   free(initial_metadata_recv);
@@ -370,12 +368,8 @@ void resource_quota_server(grpc_end2end_test_config config) {
   free(call_details);
   free(status);
   free(details);
-  free(details_capacity);
   free(request_payload_recv);
   free(was_cancelled);
-
-  end_test(&f);
-  config.tear_down_data(&f);
 }
 
 void resource_quota_server_pre_init(void) {}
diff --git a/test/core/end2end/tests/server_finishes_request.c b/test/core/end2end/tests/server_finishes_request.c
index 3bb25fd924..b42d17002e 100644
--- a/test/core/end2end/tests/server_finishes_request.c
+++ b/test/core/end2end/tests/server_finishes_request.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,13 +111,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -134,7 +134,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -142,7 +142,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -166,7 +165,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -183,13 +183,13 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.c b/test/core/end2end/tests/shutdown_finishes_calls.c
index b80a2e35f2..c019682ea6 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.c
+++ b/test/core/end2end/tests/shutdown_finishes_calls.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -100,13 +100,13 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -128,7 +128,7 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -136,7 +136,6 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -172,12 +171,12 @@ static void test_early_server_shutdown_finishes_inflight_calls(
   grpc_server_destroy(f.server);
 
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/shutdown_finishes_tags.c b/test/core/end2end/tests/shutdown_finishes_tags.c
index 1d110a74ea..5540d2aab9 100644
--- a/test/core/end2end/tests/shutdown_finishes_tags.c
+++ b/test/core/end2end/tests/shutdown_finishes_tags.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
diff --git a/test/core/end2end/tests/simple_cacheable_request.c b/test/core/end2end/tests/simple_cacheable_request.c
index 2c229b08fe..4eef02e9ee 100644
--- a/test/core/end2end/tests/simple_cacheable_request.c
+++ b/test/core/end2end/tests/simple_cacheable_request.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,12 +111,22 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
-  grpc_metadata meta_c[2] = {
-      {"key1", "val1", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key2", "val2", 4, 0, {{NULL, NULL, NULL, NULL}}}};
-  grpc_metadata meta_s[2] = {
-      {"key3", "val3", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key4", "val4", 4, 0, {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_c[2] = {{grpc_slice_from_static_string("key1"),
+                              grpc_slice_from_static_string("val1"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key2"),
+                              grpc_slice_from_static_string("val2"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_s[2] = {{grpc_slice_from_static_string("key3"),
+                              grpc_slice_from_static_string("val3"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key4"),
+                              grpc_slice_from_static_string("val4"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
   grpc_end2end_test_fixture f = begin_test(
       config, "test_cacheable_request_response_with_metadata_and_payload", NULL,
       NULL);
@@ -131,13 +141,13 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -155,7 +165,7 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -164,12 +174,12 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -177,7 +187,6 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -200,7 +209,7 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -218,14 +227,15 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -237,8 +247,8 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_REQUEST_PROXYING) {
@@ -254,7 +264,7 @@ static void test_cacheable_request_response_with_metadata_and_payload(
   GPR_ASSERT(contains_metadata(&initial_metadata_recv, "key3", "val3"));
   GPR_ASSERT(contains_metadata(&initial_metadata_recv, "key4", "val4"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.c
index 414a03d98b..e3b6aee783 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.c
@@ -46,7 +46,7 @@
 static void *tag(intptr_t t) { return (void *)t; }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -62,7 +62,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -100,15 +100,16 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   config.init_client(f, client_args);
+  config.init_server(f, server_args);
 
   c = grpc_channel_create_call(
-      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f->client, NULL, GRPC_PROPAGATE_DEFAULTS, f->cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -129,7 +130,7 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -137,15 +138,12 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
-  config.init_server(f, server_args);
-
   error =
       grpc_server_request_call(f->server, &s, &call_details,
                                &request_metadata_recv, f->cq, f->cq, tag(101));
@@ -163,7 +161,8 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -180,13 +179,13 @@ static void simple_delayed_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -208,7 +207,8 @@ static void test_simple_delayed_request_short(grpc_end2end_test_config config) {
   client_args.args = arg_array;
   client_args.num_args = 1;
 
-  gpr_log(GPR_INFO, "%s/%s", "test_simple_delayed_request_short", config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", "test_simple_delayed_request_short",
+          config.name);
   f = config.create_fixture(NULL, NULL);
 
   simple_delayed_request_body(config, &f, &client_args, NULL, 100000);
@@ -226,7 +226,8 @@ static void test_simple_delayed_request_long(grpc_end2end_test_config config) {
   client_args.args = arg_array;
   client_args.num_args = 1;
 
-  gpr_log(GPR_INFO, "%s/%s", "test_simple_delayed_request_long", config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", "test_simple_delayed_request_long",
+          config.name);
   f = config.create_fixture(NULL, NULL);
   /* This timeout should be longer than a single retry */
   simple_delayed_request_body(config, &f, &client_args, NULL, 1500000);
diff --git a/test/core/end2end/tests/simple_metadata.c b/test/core/end2end/tests/simple_metadata.c
index 5490cc2b75..7ab5563cfa 100644
--- a/test/core/end2end/tests/simple_metadata.c
+++ b/test/core/end2end/tests/simple_metadata.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -109,12 +109,22 @@ static void test_request_response_with_metadata_and_payload(
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
-  grpc_metadata meta_c[2] = {
-      {"key1", "val1", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key2", "val2", 4, 0, {{NULL, NULL, NULL, NULL}}}};
-  grpc_metadata meta_s[2] = {
-      {"key3", "val3", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key4", "val4", 4, 0, {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_c[2] = {{grpc_slice_from_static_string("key1"),
+                              grpc_slice_from_static_string("val1"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key2"),
+                              grpc_slice_from_static_string("val2"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_s[2] = {{grpc_slice_from_static_string("key3"),
+                              grpc_slice_from_static_string("val3"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key4"),
+                              grpc_slice_from_static_string("val4"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
   grpc_end2end_test_fixture f = begin_test(
       config, "test_request_response_with_metadata_and_payload", NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
@@ -128,13 +138,13 @@ static void test_request_response_with_metadata_and_payload(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -152,7 +162,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -161,12 +171,12 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -174,7 +184,6 @@ static void test_request_response_with_metadata_and_payload(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -197,7 +206,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -215,14 +224,15 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -234,8 +244,8 @@ static void test_request_response_with_metadata_and_payload(
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 0);
@@ -246,7 +256,7 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(contains_metadata(&initial_metadata_recv, "key3", "val3"));
   GPR_ASSERT(contains_metadata(&initial_metadata_recv, "key4", "val4"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.c
index 2dea5d6af2..af5d74959e 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.c
@@ -52,7 +52,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -111,14 +111,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
   char *peer;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,7 +144,7 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -152,7 +152,6 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -185,7 +184,8 @@ static void simple_request_body(grpc_end2end_test_config config,
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -202,14 +202,14 @@ static void simple_request_body(grpc_end2end_test_config config,
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(0 == call_details.flags);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
@@ -236,7 +236,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config) {
       begin_test(config, "test_invoke_10_simple_requests", NULL, NULL);
   for (i = 0; i < 10; i++) {
     simple_request_body(config, f);
-    gpr_log(GPR_INFO, "Passed simple request %d", i);
+    gpr_log(GPR_INFO, "Running test: Passed simple request %d", i);
   }
   end_test(&f);
   config.tear_down_data(&f);
diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.c
index 583bc9268f..42055907c8 100644
--- a/test/core/end2end/tests/streaming_error_response.c
+++ b/test/core/end2end/tests/streaming_error_response.c
@@ -51,8 +51,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *server_args,
                                             bool request_status_early) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s/request_status_early=%s", test_name, config.name,
-          request_status_early ? "true" : "false");
+  gpr_log(GPR_INFO, "Running test: %s/%s/request_status_early=%s", test_name,
+          config.name, request_status_early ? "true" : "false");
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -60,7 +60,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -76,7 +76,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -121,13 +121,13 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -144,17 +144,16 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload1_recv;
+  op->data.recv_message.recv_message = &response_payload1_recv;
   op++;
   if (request_status_early) {
     op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
     op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
     op->data.recv_status_on_client.status = &status;
     op->data.recv_status_on_client.status_details = &details;
-    op->data.recv_status_on_client.status_details_capacity = &details_capacity;
     op++;
   }
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
@@ -172,7 +171,7 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload1;
+  op->data.send_message.send_message = response_payload1;
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
@@ -183,7 +182,7 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload2;
+  op->data.send_message.send_message = response_payload2;
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
@@ -202,7 +201,8 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_FAILED_PRECONDITION;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
@@ -211,7 +211,7 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
     memset(ops, 0, sizeof(ops));
     op = ops;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &response_payload2_recv;
+    op->data.recv_message.recv_message = &response_payload2_recv;
     op++;
     error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
     GPR_ASSERT(GRPC_CALL_OK == error);
@@ -232,7 +232,6 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
     op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
     op->data.recv_status_on_client.status = &status;
     op->data.recv_status_on_client.status_details = &details;
-    op->data.recv_status_on_client.status_details_capacity = &details_capacity;
     op++;
     error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
     GPR_ASSERT(GRPC_CALL_OK == error);
@@ -245,13 +244,13 @@ static void test(grpc_end2end_test_config config, bool request_status_early) {
   }
 
   GPR_ASSERT(status == GRPC_STATUS_FAILED_PRECONDITION);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(was_cancelled == 1);
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/trailing_metadata.c b/test/core/end2end/tests/trailing_metadata.c
index 9fd4fbc052..dbbda505bc 100644
--- a/test/core/end2end/tests/trailing_metadata.c
+++ b/test/core/end2end/tests/trailing_metadata.c
@@ -50,7 +50,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             grpc_channel_args *client_args,
                                             grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
@@ -58,7 +58,7 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
 }
 
 static gpr_timespec n_seconds_time(int n) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+  return grpc_timeout_seconds_to_deadline(n);
 }
 
 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
@@ -74,7 +74,7 @@ static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
@@ -109,15 +109,30 @@ static void test_request_response_with_metadata_and_payload(
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
-  grpc_metadata meta_c[2] = {
-      {"key1", "val1", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key2", "val2", 4, 0, {{NULL, NULL, NULL, NULL}}}};
-  grpc_metadata meta_s[2] = {
-      {"key3", "val3", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key4", "val4", 4, 0, {{NULL, NULL, NULL, NULL}}}};
-  grpc_metadata meta_t[2] = {
-      {"key5", "val5", 4, 0, {{NULL, NULL, NULL, NULL}}},
-      {"key6", "val6", 4, 0, {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_c[2] = {{grpc_slice_from_static_string("key1"),
+                              grpc_slice_from_static_string("val1"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key2"),
+                              grpc_slice_from_static_string("val2"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_s[2] = {{grpc_slice_from_static_string("key3"),
+                              grpc_slice_from_static_string("val3"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key4"),
+                              grpc_slice_from_static_string("val4"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
+  grpc_metadata meta_t[2] = {{grpc_slice_from_static_string("key5"),
+                              grpc_slice_from_static_string("val5"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}},
+                             {grpc_slice_from_static_string("key6"),
+                              grpc_slice_from_static_string("val6"),
+                              0,
+                              {{NULL, NULL, NULL, NULL}}}};
   grpc_end2end_test_fixture f = begin_test(
       config, "test_request_response_with_metadata_and_payload", NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
@@ -131,13 +146,13 @@ static void test_request_response_with_metadata_and_payload(
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   int was_cancelled = 2;
 
   c = grpc_channel_create_call(
-      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq, "/foo",
-      get_host_override_string("foo.test.google.fr:1234", config), deadline,
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
       NULL);
   GPR_ASSERT(c);
 
@@ -155,7 +170,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = request_payload;
+  op->data.send_message.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -164,12 +179,12 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -177,7 +192,6 @@ static void test_request_response_with_metadata_and_payload(
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -200,7 +214,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -218,7 +232,7 @@ static void test_request_response_with_metadata_and_payload(
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = response_payload;
+  op->data.send_message.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -226,7 +240,8 @@ static void test_request_response_with_metadata_and_payload(
   op->data.send_status_from_server.trailing_metadata_count = 2;
   op->data.send_status_from_server.trailing_metadata = meta_t;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -238,8 +253,8 @@ static void test_request_response_with_metadata_and_payload(
   cq_verify(cqv);
 
   GPR_ASSERT(status == GRPC_STATUS_OK);
-  GPR_ASSERT(0 == strcmp(details, "xyz"));
-  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   validate_host_override_string("foo.test.google.fr:1234", call_details.host,
                                 config);
   GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
@@ -251,7 +266,7 @@ static void test_request_response_with_metadata_and_payload(
   GPR_ASSERT(contains_metadata(&trailing_metadata_recv, "key5", "val5"));
   GPR_ASSERT(contains_metadata(&trailing_metadata_recv, "key6", "val6"));
 
-  gpr_free(details);
+  grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
diff --git a/test/core/end2end/tests/write_buffering.c b/test/core/end2end/tests/write_buffering.c
new file mode 100644
index 0000000000..abf90ca6e0
--- /dev/null
+++ b/test/core/end2end/tests/write_buffering.c
@@ -0,0 +1,291 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/end2end/cq_verifier.h"
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
+  f = config.create_fixture(client_args, server_args);
+  config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_time(int n) {
+  return grpc_timeout_seconds_to_deadline(n);
+}
+
+static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
+                 .type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->cq);
+  drain_cq(f->cq);
+  grpc_completion_queue_destroy(f->cq);
+}
+
+/* Client sends a request with payload, server reads then returns status. */
+static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
+  grpc_call *c;
+  grpc_call *s;
+  grpc_slice request_payload_slice1 =
+      grpc_slice_from_copied_string("hello world");
+  grpc_byte_buffer *request_payload1 =
+      grpc_raw_byte_buffer_create(&request_payload_slice1, 1);
+  grpc_slice request_payload_slice2 = grpc_slice_from_copied_string("abc123");
+  grpc_byte_buffer *request_payload2 =
+      grpc_raw_byte_buffer_create(&request_payload_slice2, 1);
+  gpr_timespec deadline = five_seconds_time();
+  grpc_end2end_test_fixture f =
+      begin_test(config, "test_invoke_request_with_payload", NULL, NULL);
+  cq_verifier *cqv = cq_verifier_create(f.cq);
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv1 = NULL;
+  grpc_byte_buffer *request_payload_recv2 = NULL;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  grpc_slice details = grpc_empty_slice();
+  int was_cancelled = 2;
+
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
+      NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+  CQ_EXPECT_COMPLETION(cqv, tag(1), true); /* send message is buffered */
+  CQ_EXPECT_COMPLETION(cqv, tag(101), true);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message.send_message = request_payload1;
+  op->flags = GRPC_WRITE_BUFFER_HINT;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  /* recv message should not succeed yet - it's buffered at the client still */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &request_payload_recv1;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(2), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(3), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(102), true);
+  cq_verify(cqv);
+
+  /* send another message, this time not buffered */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message.send_message = request_payload2;
+  op->flags = 0;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  /* now the first send should match up with the first recv */
+  CQ_EXPECT_COMPLETION(cqv, tag(103), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(4), true);
+  cq_verify(cqv);
+
+  /* and the next recv should be ready immediately also */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &request_payload_recv2;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(104), true);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), NULL);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(105), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(105), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(4), 1);
+  cq_verify(cqv);
+
+  GPR_ASSERT(status == GRPC_STATUS_OK);
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
+  GPR_ASSERT(was_cancelled == 0);
+  GPR_ASSERT(byte_buffer_eq_string(request_payload_recv1, "hello world"));
+  GPR_ASSERT(byte_buffer_eq_string(request_payload_recv2, "abc123"));
+
+  grpc_slice_unref(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_byte_buffer_destroy(request_payload1);
+  grpc_byte_buffer_destroy(request_payload_recv1);
+  grpc_byte_buffer_destroy(request_payload2);
+  grpc_byte_buffer_destroy(request_payload_recv2);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+void write_buffering(grpc_end2end_test_config config) {
+  test_invoke_request_with_payload(config);
+}
+
+void write_buffering_pre_init(void) {}
diff --git a/test/core/end2end/tests/write_buffering_at_end.c b/test/core/end2end/tests/write_buffering_at_end.c
new file mode 100644
index 0000000000..8c02b425ba
--- /dev/null
+++ b/test/core/end2end/tests/write_buffering_at_end.c
@@ -0,0 +1,280 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/end2end/cq_verifier.h"
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
+  f = config.create_fixture(client_args, server_args);
+  config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_time(int n) {
+  return grpc_timeout_seconds_to_deadline(n);
+}
+
+static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(
+                 f->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
+                 .type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->cq);
+  drain_cq(f->cq);
+  grpc_completion_queue_destroy(f->cq);
+}
+
+/* Client sends a request with payload, server reads then returns status. */
+static void test_invoke_request_with_payload(grpc_end2end_test_config config) {
+  grpc_call *c;
+  grpc_call *s;
+  grpc_slice request_payload_slice =
+      grpc_slice_from_copied_string("hello world");
+  grpc_byte_buffer *request_payload =
+      grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+  gpr_timespec deadline = five_seconds_time();
+  grpc_end2end_test_fixture f =
+      begin_test(config, "test_invoke_request_with_payload", NULL, NULL);
+  cq_verifier *cqv = cq_verifier_create(f.cq);
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv1 = NULL;
+  grpc_byte_buffer *request_payload_recv2 = NULL;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  grpc_slice details = grpc_empty_slice();
+  int was_cancelled = 2;
+
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
+      NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+  CQ_EXPECT_COMPLETION(cqv, tag(1), true); /* send message is buffered */
+  CQ_EXPECT_COMPLETION(cqv, tag(101), true);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message.send_message = request_payload;
+  op->flags = GRPC_WRITE_BUFFER_HINT;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  /* recv message should not succeed yet - it's buffered at the client still */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &request_payload_recv1;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(2), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(3), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(102), true);
+  cq_verify(cqv);
+
+  /* send end of stream: should release the buffering */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  /* now the first send should match up with the first recv */
+  CQ_EXPECT_COMPLETION(cqv, tag(103), true);
+  CQ_EXPECT_COMPLETION(cqv, tag(4), true);
+  cq_verify(cqv);
+
+  /* and the next recv should be ready immediately also (and empty) */
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &request_payload_recv2;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(104), true);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), NULL);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(105), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(105), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(4), 1);
+  cq_verify(cqv);
+
+  GPR_ASSERT(status == GRPC_STATUS_OK);
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
+  GPR_ASSERT(was_cancelled == 0);
+  GPR_ASSERT(byte_buffer_eq_string(request_payload_recv1, "hello world"));
+  GPR_ASSERT(request_payload_recv2 == NULL);
+
+  grpc_slice_unref(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_byte_buffer_destroy(request_payload);
+  grpc_byte_buffer_destroy(request_payload_recv1);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+void write_buffering_at_end(grpc_end2end_test_config config) {
+  test_invoke_request_with_payload(config);
+}
+
+void write_buffering_at_end_pre_init(void) {}
diff --git a/test/core/fling/client.c b/test/core/fling/client.c
index e717b7f7fe..85bab6d431 100644
--- a/test/core/fling/client.c
+++ b/test/core/fling/client.c
@@ -57,8 +57,7 @@ static grpc_metadata_array initial_metadata_recv;
 static grpc_metadata_array trailing_metadata_recv;
 static grpc_byte_buffer *response_payload_recv = NULL;
 static grpc_status_code status;
-static char *details = NULL;
-static size_t details_capacity = 0;
+static grpc_slice details;
 static grpc_op *op;
 
 static void init_ping_pong_request(void) {
@@ -72,29 +71,30 @@ static void init_ping_pong_request(void) {
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message = the_buffer;
+  op->data.send_message.send_message = the_buffer;
   op++;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &response_payload_recv;
+  op->data.recv_message.recv_message = &response_payload_recv;
   op++;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op++;
 }
 
 static void step_ping_pong_request(void) {
   GPR_TIMER_BEGIN("ping_pong", 1);
-  call = grpc_channel_create_call(channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                                  "/Reflector/reflectUnary", "localhost",
-                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  grpc_slice host = grpc_slice_from_static_string("localhost");
+  call = grpc_channel_create_call(
+      channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+      grpc_slice_from_static_string("/Reflector/reflectUnary"), &host,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(call, ops,
                                                    (size_t)(op - ops),
                                                    (void *)1, NULL));
@@ -109,13 +109,16 @@ static void init_ping_pong_stream(void) {
   grpc_metadata_array_init(&initial_metadata_recv);
 
   grpc_call_error error;
-  call = grpc_channel_create_call(channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                                  "/Reflector/reflectStream", "localhost",
-                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  grpc_slice host = grpc_slice_from_static_string("localhost");
+  call = grpc_channel_create_call(
+      channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+      grpc_slice_from_static_string("/Reflector/reflectStream"), &host,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   stream_init_ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
   stream_init_ops[0].data.send_initial_metadata.count = 0;
   stream_init_ops[1].op = GRPC_OP_RECV_INITIAL_METADATA;
-  stream_init_ops[1].data.recv_initial_metadata = &initial_metadata_recv;
+  stream_init_ops[1].data.recv_initial_metadata.recv_initial_metadata =
+      &initial_metadata_recv;
   error = grpc_call_start_batch(call, stream_init_ops, 2, (void *)1, NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
   grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
@@ -123,9 +126,9 @@ static void init_ping_pong_stream(void) {
   grpc_metadata_array_init(&initial_metadata_recv);
 
   stream_step_ops[0].op = GRPC_OP_SEND_MESSAGE;
-  stream_step_ops[0].data.send_message = the_buffer;
+  stream_step_ops[0].data.send_message.send_message = the_buffer;
   stream_step_ops[1].op = GRPC_OP_RECV_MESSAGE;
-  stream_step_ops[1].data.recv_message = &response_payload_recv;
+  stream_step_ops[1].data.recv_message.recv_message = &response_payload_recv;
 }
 
 static void step_ping_pong_stream(void) {
@@ -211,9 +214,9 @@ int main(int argc, char **argv) {
 
   sc.init();
 
-  gpr_timespec end_warmup = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(warmup_seconds);
+  gpr_timespec end_warmup = grpc_timeout_seconds_to_deadline(warmup_seconds);
   gpr_timespec end_profiling =
-      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(warmup_seconds + benchmark_seconds);
+      grpc_timeout_seconds_to_deadline(warmup_seconds + benchmark_seconds);
 
   while (gpr_time_cmp(gpr_now(end_warmup.clock_type), end_warmup) < 0) {
     sc.do_one_step();
diff --git a/test/core/fling/server.c b/test/core/fling/server.c
index fd446f1128..7ea54b1167 100644
--- a/test/core/fling/server.c
+++ b/test/core/fling/server.c
@@ -107,18 +107,18 @@ static void handle_unary_method(void) {
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &terminal_buffer;
+  op->data.recv_message.recv_message = &terminal_buffer;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
   if (payload_buffer == NULL) {
     gpr_log(GPR_INFO, "NULL payload buffer !!!");
   }
-  op->data.send_message = payload_buffer;
+  op->data.send_message.send_message = payload_buffer;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
   op->data.send_status_from_server.trailing_metadata_count = 0;
-  op->data.send_status_from_server.status_details = "";
+  op->data.send_status_from_server.status_details = NULL;
   op++;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
@@ -144,7 +144,7 @@ static void start_read_op(int t) {
   grpc_call_error error;
   /* Starting read at server */
   read_op.op = GRPC_OP_RECV_MESSAGE;
-  read_op.data.recv_message = &payload_buffer;
+  read_op.data.recv_message.recv_message = &payload_buffer;
   error = grpc_call_start_batch(call, &read_op, 1, tag(t), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 }
@@ -157,7 +157,7 @@ static void start_write_op(void) {
   if (payload_buffer == NULL) {
     gpr_log(GPR_INFO, "NULL payload buffer !!!");
   }
-  write_op.data.send_message = payload_buffer;
+  write_op.data.send_message.send_message = payload_buffer;
   error = grpc_call_start_batch(call, &write_op, 1, tagarg, NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
 }
@@ -168,7 +168,7 @@ static void start_send_status(void) {
   status_op[0].op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   status_op[0].data.send_status_from_server.status = GRPC_STATUS_OK;
   status_op[0].data.send_status_from_server.trailing_metadata_count = 0;
-  status_op[0].data.send_status_from_server.status_details = "";
+  status_op[0].data.send_status_from_server.status_details = NULL;
   status_op[1].op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   status_op[1].data.recv_close_on_server.cancelled = &was_cancelled;
 
@@ -244,7 +244,7 @@ int main(int argc, char **argv) {
       gpr_log(GPR_INFO, "Shutting down due to SIGINT");
       grpc_server_shutdown_and_notify(server, cq, tag(1000));
       GPR_ASSERT(grpc_completion_queue_pluck(
-                     cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                     cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                      .type == GRPC_OP_COMPLETE);
       grpc_completion_queue_shutdown(cq);
       shutdown_started = 1;
@@ -259,8 +259,8 @@ int main(int argc, char **argv) {
         switch ((intptr_t)s) {
           case FLING_SERVER_NEW_REQUEST:
             if (call != NULL) {
-              if (0 ==
-                  strcmp(call_details.method, "/Reflector/reflectStream")) {
+              if (0 == grpc_slice_str_cmp(call_details.method,
+                                          "/Reflector/reflectStream")) {
                 /* Received streaming call. Send metadata here. */
                 start_read_op(FLING_SERVER_READ_FOR_STREAMING);
                 send_initial_metadata();
diff --git a/test/core/handshake/client_ssl.c b/test/core/handshake/client_ssl.c
index 24281e0b41..a22133e629 100644
--- a/test/core/handshake/client_ssl.c
+++ b/test/core/handshake/client_ssl.c
@@ -104,7 +104,8 @@ static int alpn_select_cb(SSL *ssl, const uint8_t **out, uint8_t *out_len,
   bool grpc_exp_seen = false;
   bool h2_seen = false;
   const char *inp = (const char *)in;
-  for (int i = 0; i < (int)in_len; ++i) {
+  const char *in_end = inp + in_len;
+  while (inp < in_end) {
     const size_t length = (size_t)*inp++;
     if (length == strlen("grpc-exp") && strncmp(inp, "grpc-exp", length) == 0) {
       grpc_exp_seen = true;
@@ -117,6 +118,7 @@ static int alpn_select_cb(SSL *ssl, const uint8_t **out, uint8_t *out_len,
     inp += length;
   }
 
+  GPR_ASSERT(inp == in_end);
   GPR_ASSERT(grpc_exp_seen);
   GPR_ASSERT(h2_seen);
 
@@ -272,8 +274,8 @@ static bool client_ssl_test(char *server_alpn_preferred) {
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
   while (state != GRPC_CHANNEL_READY && retries-- > 0) {
     grpc_channel_watch_connectivity_state(
-        channel, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), cq, NULL);
-    gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5);
+        channel, state, grpc_timeout_seconds_to_deadline(3), cq, NULL);
+    gpr_timespec cq_deadline = grpc_timeout_seconds_to_deadline(5);
     grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
     state =
diff --git a/test/core/handshake/server_ssl.c b/test/core/handshake/server_ssl.c
index f39b0040a6..0bd5a03cff 100644
--- a/test/core/handshake/server_ssl.c
+++ b/test/core/handshake/server_ssl.c
@@ -113,7 +113,7 @@ static void server_thread(void *arg) {
   // sleeping between polls.
   int retries = 10;
   while (!gpr_event_get(&client_handshake_complete) && retries-- > 0) {
-    const gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1);
+    const gpr_timespec cq_deadline = grpc_timeout_seconds_to_deadline(1);
     grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
     GPR_ASSERT(ev.type == GRPC_QUEUE_TIMEOUT);
   }
@@ -122,7 +122,7 @@ static void server_thread(void *arg) {
   grpc_server_shutdown_and_notify(server, cq, NULL);
   grpc_completion_queue_shutdown(cq);
 
-  const gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5);
+  const gpr_timespec cq_deadline = grpc_timeout_seconds_to_deadline(5);
   grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
   GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
 
diff --git a/test/core/http/BUILD b/test/core/http/BUILD
new file mode 100644
index 0000000000..037ede3cd1
--- /dev/null
+++ b/test/core/http/BUILD
@@ -0,0 +1,49 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
+
+grpc_fuzzer(
+  name = "response_fuzzer",
+  srcs = ["response_fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "response_corpus",
+  copts = ["-std=c99"],
+)
+
+grpc_fuzzer(
+  name = "request_fuzzer",
+  srcs = ["request_fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "request_corpus",
+  copts = ["-std=c99"],
+)
+
diff --git a/test/core/http/httpcli_test.c b/test/core/http/httpcli_test.c
index 3e312c1dde..6cc00f871d 100644
--- a/test/core/http/httpcli_test.c
+++ b/test/core/http/httpcli_test.c
@@ -51,7 +51,7 @@ static gpr_mu *g_mu;
 static grpc_polling_entity g_pops;
 
 static gpr_timespec n_seconds_time(int seconds) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(seconds);
+  return grpc_timeout_seconds_to_deadline(seconds);
 }
 
 static void on_finish(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
@@ -90,10 +90,11 @@ static void test_get(int port) {
   grpc_http_response response;
   memset(&response, 0, sizeof(response));
   grpc_resource_quota *resource_quota = grpc_resource_quota_create("test_get");
-  grpc_httpcli_get(&exec_ctx, &g_context, &g_pops, resource_quota, &req,
-                   n_seconds_time(15),
-                   grpc_closure_create(on_finish, &response), &response);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_httpcli_get(
+      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      grpc_closure_create(on_finish, &response, grpc_schedule_on_exec_ctx),
+      &response);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker *worker = NULL;
@@ -130,10 +131,12 @@ static void test_post(int port) {
   grpc_http_response response;
   memset(&response, 0, sizeof(response));
   grpc_resource_quota *resource_quota = grpc_resource_quota_create("test_post");
-  grpc_httpcli_post(&exec_ctx, &g_context, &g_pops, resource_quota, &req,
-                    "hello", 5, n_seconds_time(15),
-                    grpc_closure_create(on_finish, &response), &response);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_httpcli_post(
+      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
+      n_seconds_time(15),
+      grpc_closure_create(on_finish, &response, grpc_schedule_on_exec_ctx),
+      &response);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker *worker = NULL;
@@ -207,7 +210,8 @@ int main(int argc, char **argv) {
   test_post(port);
 
   grpc_httpcli_context_destroy(&g_context);
-  grpc_closure_init(&destroyed, destroy_pops, &g_pops);
+  grpc_closure_init(&destroyed, destroy_pops, &g_pops,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                         &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/test/core/http/httpscli_test.c b/test/core/http/httpscli_test.c
index d06035149e..e1a26d91e9 100644
--- a/test/core/http/httpscli_test.c
+++ b/test/core/http/httpscli_test.c
@@ -51,7 +51,7 @@ static gpr_mu *g_mu;
 static grpc_polling_entity g_pops;
 
 static gpr_timespec n_seconds_time(int seconds) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(seconds);
+  return grpc_timeout_seconds_to_deadline(seconds);
 }
 
 static void on_finish(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
@@ -91,10 +91,11 @@ static void test_get(int port) {
   grpc_http_response response;
   memset(&response, 0, sizeof(response));
   grpc_resource_quota *resource_quota = grpc_resource_quota_create("test_get");
-  grpc_httpcli_get(&exec_ctx, &g_context, &g_pops, resource_quota, &req,
-                   n_seconds_time(15),
-                   grpc_closure_create(on_finish, &response), &response);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_httpcli_get(
+      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      grpc_closure_create(on_finish, &response, grpc_schedule_on_exec_ctx),
+      &response);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker *worker = NULL;
@@ -132,10 +133,12 @@ static void test_post(int port) {
   grpc_http_response response;
   memset(&response, 0, sizeof(response));
   grpc_resource_quota *resource_quota = grpc_resource_quota_create("test_post");
-  grpc_httpcli_post(&exec_ctx, &g_context, &g_pops, resource_quota, &req,
-                    "hello", 5, n_seconds_time(15),
-                    grpc_closure_create(on_finish, &response), &response);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_httpcli_post(
+      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
+      n_seconds_time(15),
+      grpc_closure_create(on_finish, &response, grpc_schedule_on_exec_ctx),
+      &response);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker *worker = NULL;
@@ -210,7 +213,8 @@ int main(int argc, char **argv) {
   test_post(port);
 
   grpc_httpcli_context_destroy(&g_context);
-  grpc_closure_init(&destroyed, destroy_pops, &g_pops);
+  grpc_closure_init(&destroyed, destroy_pops, &g_pops,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
                         &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/test/core/internal_api_canaries/iomgr.c b/test/core/internal_api_canaries/iomgr.c
index de03c47c13..d73d5c175c 100644
--- a/test/core/internal_api_canaries/iomgr.c
+++ b/test/core/internal_api_canaries/iomgr.c
@@ -48,7 +48,7 @@
 static void test_code(void) {
   /* iomgr.h */
   grpc_iomgr_init();
-  grpc_iomgr_shutdown();
+  grpc_iomgr_shutdown(NULL);
 
   /* closure.h */
   grpc_closure closure;
@@ -60,9 +60,9 @@ static void test_code(void) {
   closure_list.head = NULL;
   closure_list.tail = NULL;
 
-  grpc_closure_init(&closure, NULL, NULL);
+  grpc_closure_init(&closure, NULL, NULL, grpc_schedule_on_exec_ctx);
 
-  grpc_closure_create(NULL, NULL);
+  grpc_closure_create(NULL, NULL, grpc_schedule_on_exec_ctx);
 
   grpc_closure_list_move(NULL, NULL);
   grpc_closure_list_append(NULL, NULL, GRPC_ERROR_CREATE("Foo"));
@@ -72,8 +72,8 @@ static void test_code(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_exec_ctx_flush(&exec_ctx);
   grpc_exec_ctx_finish(&exec_ctx);
-  grpc_exec_ctx_sched(&exec_ctx, &closure, GRPC_ERROR_CREATE("Foo"), NULL);
-  grpc_exec_ctx_enqueue_list(&exec_ctx, &closure_list, NULL);
+  grpc_closure_sched(&exec_ctx, &closure, GRPC_ERROR_CREATE("Foo"));
+  grpc_closure_list_sched(&exec_ctx, &closure_list);
 
   /* endpoint.h */
   grpc_endpoint endpoint;
@@ -92,15 +92,14 @@ static void test_code(void) {
   grpc_endpoint_read(&exec_ctx, &endpoint, NULL, NULL);
   grpc_endpoint_get_peer(&endpoint);
   grpc_endpoint_write(&exec_ctx, &endpoint, NULL, NULL);
-  grpc_endpoint_shutdown(&exec_ctx, &endpoint);
+  grpc_endpoint_shutdown(&exec_ctx, &endpoint, GRPC_ERROR_CANCELLED);
   grpc_endpoint_destroy(&exec_ctx, &endpoint);
   grpc_endpoint_add_to_pollset(&exec_ctx, &endpoint, NULL);
   grpc_endpoint_add_to_pollset_set(&exec_ctx, &endpoint, NULL);
 
   /* executor.h */
   grpc_executor_init();
-  grpc_executor_push(&closure, GRPC_ERROR_CREATE("Phi"));
-  grpc_executor_shutdown();
+  grpc_executor_shutdown(NULL);
 
   /* pollset.h */
   grpc_pollset_size();
diff --git a/test/core/iomgr/combiner_test.c b/test/core/iomgr/combiner_test.c
index f7d5809be7..4c9275a673 100644
--- a/test/core/iomgr/combiner_test.c
+++ b/test/core/iomgr/combiner_test.c
@@ -59,9 +59,10 @@ static void test_execute_one(void) {
   grpc_combiner *lock = grpc_combiner_create(NULL);
   bool done = false;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_combiner_execute(&exec_ctx, lock,
-                        grpc_closure_create(set_bool_to_true, &done),
-                        GRPC_ERROR_NONE, false);
+  grpc_closure_sched(&exec_ctx,
+                     grpc_closure_create(set_bool_to_true, &done,
+                                         grpc_combiner_scheduler(lock, false)),
+                     GRPC_ERROR_NONE);
   grpc_exec_ctx_flush(&exec_ctx);
   GPR_ASSERT(done);
   grpc_combiner_destroy(&exec_ctx, lock);
@@ -94,14 +95,15 @@ static void execute_many_loop(void *a) {
       ex_args *c = gpr_malloc(sizeof(*c));
       c->ctr = &args->ctr;
       c->value = n++;
-      grpc_combiner_execute(&exec_ctx, args->lock,
-                            grpc_closure_create(check_one, c), GRPC_ERROR_NONE,
-                            false);
+      grpc_closure_sched(
+          &exec_ctx, grpc_closure_create(check_one, c, grpc_combiner_scheduler(
+                                                           args->lock, false)),
+          GRPC_ERROR_NONE);
       grpc_exec_ctx_flush(&exec_ctx);
     }
     // sleep for a little bit, to test a combiner draining and another thread
     // picking it up
-    gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(100));
+    gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(100));
   }
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -134,9 +136,10 @@ static void in_finally(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 }
 
 static void add_finally(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  grpc_combiner_execute_finally(exec_ctx, arg,
-                                grpc_closure_create(in_finally, NULL),
-                                GRPC_ERROR_NONE, false);
+  grpc_closure_sched(exec_ctx, grpc_closure_create(
+                                   in_finally, NULL,
+                                   grpc_combiner_finally_scheduler(arg, false)),
+                     GRPC_ERROR_NONE);
 }
 
 static void test_execute_finally(void) {
@@ -144,8 +147,10 @@ static void test_execute_finally(void) {
 
   grpc_combiner *lock = grpc_combiner_create(NULL);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_combiner_execute(&exec_ctx, lock, grpc_closure_create(add_finally, lock),
-                        GRPC_ERROR_NONE, false);
+  grpc_closure_sched(&exec_ctx,
+                     grpc_closure_create(add_finally, lock,
+                                         grpc_combiner_scheduler(lock, false)),
+                     GRPC_ERROR_NONE);
   grpc_exec_ctx_flush(&exec_ctx);
   GPR_ASSERT(got_in_finally);
   grpc_combiner_destroy(&exec_ctx, lock);
diff --git a/test/core/iomgr/endpoint_pair_test.c b/test/core/iomgr/endpoint_pair_test.c
index 2a257a7cea..f02171f2ef 100644
--- a/test/core/iomgr/endpoint_pair_test.c
+++ b/test/core/iomgr/endpoint_pair_test.c
@@ -81,7 +81,8 @@ int main(int argc, char **argv) {
   g_pollset = gpr_malloc(grpc_pollset_size());
   grpc_pollset_init(g_pollset, &g_mu);
   grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/iomgr/endpoint_tests.c b/test/core/iomgr/endpoint_tests.c
index 8186ea7e85..94067a8ca4 100644
--- a/test/core/iomgr/endpoint_tests.c
+++ b/test/core/iomgr/endpoint_tests.c
@@ -41,6 +41,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
+
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
 /*
@@ -185,7 +187,7 @@ static void read_and_write_test(grpc_endpoint_test_config config,
                                 size_t num_bytes, size_t write_size,
                                 size_t slice_size, bool shutdown) {
   struct read_and_write_test_state state;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(20);
   grpc_endpoint_test_fixture f =
       begin_test(config, "read_and_write_test", slice_size);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -211,9 +213,10 @@ static void read_and_write_test(grpc_endpoint_test_config config,
   state.write_done = 0;
   state.current_read_data = 0;
   state.current_write_data = 0;
-  grpc_closure_init(&state.done_read, read_and_write_test_read_handler, &state);
+  grpc_closure_init(&state.done_read, read_and_write_test_read_handler, &state,
+                    grpc_schedule_on_exec_ctx);
   grpc_closure_init(&state.done_write, read_and_write_test_write_handler,
-                    &state);
+                    &state, grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&state.outgoing);
   grpc_slice_buffer_init(&state.incoming);
 
@@ -230,9 +233,11 @@ static void read_and_write_test(grpc_endpoint_test_config config,
 
   if (shutdown) {
     gpr_log(GPR_DEBUG, "shutdown read");
-    grpc_endpoint_shutdown(&exec_ctx, state.read_ep);
+    grpc_endpoint_shutdown(&exec_ctx, state.read_ep,
+                           GRPC_ERROR_CREATE("Test Shutdown"));
     gpr_log(GPR_DEBUG, "shutdown write");
-    grpc_endpoint_shutdown(&exec_ctx, state.write_ep);
+    grpc_endpoint_shutdown(&exec_ctx, state.write_ep,
+                           GRPC_ERROR_CREATE("Test Shutdown"));
   }
   grpc_exec_ctx_flush(&exec_ctx);
 
@@ -249,8 +254,8 @@ static void read_and_write_test(grpc_endpoint_test_config config,
   grpc_exec_ctx_flush(&exec_ctx);
 
   end_test(config);
-  grpc_slice_buffer_destroy(&state.outgoing);
-  grpc_slice_buffer_destroy(&state.incoming);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.outgoing);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
   grpc_endpoint_destroy(&exec_ctx, state.read_ep);
   grpc_endpoint_destroy(&exec_ctx, state.write_ep);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -290,21 +295,26 @@ static void multiple_shutdown_test(grpc_endpoint_test_config config) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
   grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
-                     grpc_closure_create(inc_on_failure, &fail_count));
+                     grpc_closure_create(inc_on_failure, &fail_count,
+                                         grpc_schedule_on_exec_ctx));
   wait_for_fail_count(&exec_ctx, &fail_count, 0);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep);
+  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+                         GRPC_ERROR_CREATE("Test Shutdown"));
   wait_for_fail_count(&exec_ctx, &fail_count, 1);
   grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
-                     grpc_closure_create(inc_on_failure, &fail_count));
+                     grpc_closure_create(inc_on_failure, &fail_count,
+                                         grpc_schedule_on_exec_ctx));
   wait_for_fail_count(&exec_ctx, &fail_count, 2);
   grpc_slice_buffer_add(&slice_buffer, grpc_slice_from_copied_string("a"));
   grpc_endpoint_write(&exec_ctx, f.client_ep, &slice_buffer,
-                      grpc_closure_create(inc_on_failure, &fail_count));
+                      grpc_closure_create(inc_on_failure, &fail_count,
+                                          grpc_schedule_on_exec_ctx));
   wait_for_fail_count(&exec_ctx, &fail_count, 3);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep);
+  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+                         GRPC_ERROR_CREATE("Test Shutdown"));
   wait_for_fail_count(&exec_ctx, &fail_count, 3);
 
-  grpc_slice_buffer_destroy(&slice_buffer);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &slice_buffer);
 
   grpc_endpoint_destroy(&exec_ctx, f.client_ep);
   grpc_endpoint_destroy(&exec_ctx, f.server_ep);
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 564b05d7f4..5b05ea3338 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -45,6 +45,7 @@
 #include <grpc/support/log.h>
 
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/workqueue.h"
 #include "test/core/util/test_config.h"
 
 typedef struct test_pollset {
@@ -60,6 +61,22 @@ typedef struct test_fd {
 /* num_fds should be an even number */
 static void test_fd_init(test_fd *tfds, int *fds, int num_fds) {
   int i;
+  int r;
+
+  /* Create some dummy file descriptors. Currently using pipe file descriptors
+   * for this test but we could use any other type of file descriptors. Also,
+   * since pipe() used in this test creates two fds in each call, num_fds should
+   * be an even number */
+  GPR_ASSERT((num_fds % 2) == 0);
+  for (i = 0; i < num_fds; i = i + 2) {
+    r = pipe(fds + i);
+    if (r != 0) {
+      gpr_log(GPR_ERROR, "Error in creating pipe. %d (%s)", errno,
+              strerror(errno));
+      return;
+    }
+  }
+
   for (i = 0; i < num_fds; i++) {
     tfds[i].inner_fd = fds[i];
     tfds[i].fd = grpc_fd_create(fds[i], "test_fd");
@@ -72,7 +89,8 @@ static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *tfds,
   int i;
 
   for (i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, tfds[i].fd);
+    grpc_fd_shutdown(exec_ctx, tfds[i].fd,
+                     GRPC_ERROR_CREATE("test_fd_cleanup"));
     grpc_exec_ctx_flush(exec_ctx);
 
     grpc_fd_orphan(exec_ctx, tfds[i].fd, NULL, &release_fd, "test_fd_cleanup");
@@ -102,7 +120,8 @@ static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
   int i;
 
   for (i = 0; i < num_pollsets; i++) {
-    grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].pollset);
+    grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].pollset,
+                      grpc_schedule_on_exec_ctx);
     grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed);
 
     grpc_exec_ctx_flush(exec_ctx);
@@ -110,8 +129,80 @@ static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
   }
 }
 
-#define NUM_FDS 8
-#define NUM_POLLSETS 4
+static void increment(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
+  ++*(int *)arg;
+}
+
+/*
+ * Validate that merging two workqueues preserves the closures in each queue.
+ * This is a regression test for a bug in
+ * polling_island_merge()[ev_epoll_linux.c], where the parent relationship was
+ * inverted.
+ */
+static void test_pollset_queue_merge_items() {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  const int num_fds = 2;
+  const int num_pollsets = 2;
+  const int num_closures = 4;
+  test_fd tfds[num_fds];
+  int fds[num_fds];
+  test_pollset pollsets[num_pollsets];
+  grpc_closure closures[num_closures];
+  int i;
+  int result = 0;
+
+  test_fd_init(tfds, fds, num_fds);
+  test_pollset_init(pollsets, num_pollsets);
+
+  /* Two distinct polling islands, each with their own FD and pollset. */
+  for (i = 0; i < num_fds; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[i].pollset, tfds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* Enqeue the closures, 3 to polling island 0 and 1 to polling island 1. */
+  grpc_closure_init(
+      closures, increment, &result,
+      grpc_workqueue_scheduler(grpc_fd_get_polling_island(tfds[0].fd)));
+  grpc_closure_init(
+      closures + 1, increment, &result,
+      grpc_workqueue_scheduler(grpc_fd_get_polling_island(tfds[0].fd)));
+  grpc_closure_init(
+      closures + 2, increment, &result,
+      grpc_workqueue_scheduler(grpc_fd_get_polling_island(tfds[0].fd)));
+  grpc_closure_init(
+      closures + 3, increment, &result,
+      grpc_workqueue_scheduler(grpc_fd_get_polling_island(tfds[1].fd)));
+  for (i = 0; i < num_closures; ++i) {
+    grpc_closure_sched(&exec_ctx, closures + i, GRPC_ERROR_NONE);
+  }
+
+  /* Merge the two polling islands. */
+  grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, tfds[1].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /*
+   * Execute the closures, verify we see each one execute when executing work on
+   * the merged polling island.
+   */
+  grpc_pollset_worker *worker = NULL;
+  for (i = 0; i < num_closures; ++i) {
+    const gpr_timespec deadline = gpr_time_add(
+        gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(2, GPR_TIMESPAN));
+    gpr_mu_lock(pollsets[1].mu);
+    GRPC_LOG_IF_ERROR(
+        "grpc_pollset_work",
+        grpc_pollset_work(&exec_ctx, pollsets[1].pollset, &worker,
+                          gpr_now(GPR_CLOCK_MONOTONIC), deadline));
+    gpr_mu_unlock(pollsets[1].mu);
+  }
+  GPR_ASSERT(result == num_closures);
+
+  test_fd_cleanup(&exec_ctx, tfds, num_fds);
+  test_pollset_cleanup(&exec_ctx, pollsets, num_pollsets);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
 /*
  * Cases to test:
  *  case 1) Polling islands of both fd and pollset are NULL
@@ -124,28 +215,16 @@ static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
  * */
 static void test_add_fd_to_pollset() {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_fd tfds[NUM_FDS];
-  int fds[NUM_FDS];
-  test_pollset pollsets[NUM_POLLSETS];
+  const int num_fds = 8;
+  const int num_pollsets = 4;
+  test_fd tfds[num_fds];
+  int fds[num_fds];
+  test_pollset pollsets[num_pollsets];
   void *expected_pi = NULL;
   int i;
-  int r;
 
-  /* Create some dummy file descriptors. Currently using pipe file descriptors
-   * for this test but we could use any other type of file descriptors. Also,
-   * since pipe() used in this test creates two fds in each call, NUM_FDS should
-   * be an even number */
-  for (i = 0; i < NUM_FDS; i = i + 2) {
-    r = pipe(fds + i);
-    if (r != 0) {
-      gpr_log(GPR_ERROR, "Error in creating pipe. %d (%s)", errno,
-              strerror(errno));
-      return;
-    }
-  }
-
-  test_fd_init(tfds, fds, NUM_FDS);
-  test_pollset_init(pollsets, NUM_POLLSETS);
+  test_fd_init(tfds, fds, num_fds);
+  test_pollset_init(pollsets, num_pollsets);
 
   /*Step 1.
    * Create three polling islands (This will exercise test case 1 and 2) with
@@ -206,19 +285,19 @@ static void test_add_fd_to_pollset() {
 
   /* Compare Fd:0's polling island with that of all other Fds */
   expected_pi = grpc_fd_get_polling_island(tfds[0].fd);
-  for (i = 1; i < NUM_FDS; i++) {
+  for (i = 1; i < num_fds; i++) {
     GPR_ASSERT(grpc_are_polling_islands_equal(
         expected_pi, grpc_fd_get_polling_island(tfds[i].fd)));
   }
 
   /* Compare Fd:0's polling island with that of all other pollsets */
-  for (i = 0; i < NUM_POLLSETS; i++) {
+  for (i = 0; i < num_pollsets; i++) {
     GPR_ASSERT(grpc_are_polling_islands_equal(
         expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
   }
 
-  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
-  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
+  test_fd_cleanup(&exec_ctx, tfds, num_fds);
+  test_pollset_cleanup(&exec_ctx, pollsets, num_pollsets);
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
@@ -230,13 +309,19 @@ int main(int argc, char **argv) {
   poll_strategy = grpc_get_poll_strategy_name();
   if (poll_strategy != NULL && strcmp(poll_strategy, "epoll") == 0) {
     test_add_fd_to_pollset();
+    test_pollset_queue_merge_items();
   } else {
     gpr_log(GPR_INFO,
             "Skipping the test. The test is only relevant for 'epoll' "
             "strategy. and the current strategy is: '%s'",
             poll_strategy);
   }
-  grpc_iomgr_shutdown();
+
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_iomgr_shutdown(&exec_ctx);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   return 0;
 }
 #else /* defined(GRPC_LINUX_EPOLL) */
diff --git a/test/core/iomgr/fd_conservation_posix_test.c b/test/core/iomgr/fd_conservation_posix_test.c
index 652b37eb6f..3dffa02c3c 100644
--- a/test/core/iomgr/fd_conservation_posix_test.c
+++ b/test/core/iomgr/fd_conservation_posix_test.c
@@ -65,6 +65,10 @@ int main(int argc, char **argv) {
 
   grpc_resource_quota_unref(resource_quota);
 
-  grpc_iomgr_shutdown();
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_iomgr_shutdown(&exec_ctx);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   return 0;
 }
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index 6166699fe6..4726e935d8 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -132,7 +132,8 @@ static void session_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
   grpc_fd_orphan(exec_ctx, se->em_fd, NULL, NULL, "a");
   gpr_free(se);
   /* Start to shutdown listen fd. */
-  grpc_fd_shutdown(exec_ctx, sv->em_fd);
+  grpc_fd_shutdown(exec_ctx, sv->em_fd,
+                   GRPC_ERROR_CREATE("session_shutdown_cb"));
 }
 
 /* Called when data become readable in a session. */
@@ -219,8 +220,8 @@ static void listen_cb(grpc_exec_ctx *exec_ctx, void *arg, /*=sv_arg*/
   se->sv = sv;
   se->em_fd = grpc_fd_create(fd, "listener");
   grpc_pollset_add_fd(exec_ctx, g_pollset, se->em_fd);
-  se->session_read_closure.cb = session_read_cb;
-  se->session_read_closure.cb_arg = se;
+  grpc_closure_init(&se->session_read_closure, session_read_cb, se,
+                    grpc_schedule_on_exec_ctx);
   grpc_fd_notify_on_read(exec_ctx, se->em_fd, &se->session_read_closure);
 
   grpc_fd_notify_on_read(exec_ctx, listen_em_fd, &sv->listen_closure);
@@ -249,8 +250,8 @@ static int server_start(grpc_exec_ctx *exec_ctx, server *sv) {
   sv->em_fd = grpc_fd_create(fd, "server");
   grpc_pollset_add_fd(exec_ctx, g_pollset, sv->em_fd);
   /* Register to be interested in reading from listen_fd. */
-  sv->listen_closure.cb = listen_cb;
-  sv->listen_closure.cb_arg = sv;
+  grpc_closure_init(&sv->listen_closure, listen_cb, sv,
+                    grpc_schedule_on_exec_ctx);
   grpc_fd_notify_on_read(exec_ctx, sv->em_fd, &sv->listen_closure);
 
   return port;
@@ -333,8 +334,8 @@ static void client_session_write(grpc_exec_ctx *exec_ctx, void *arg, /*client */
   if (errno == EAGAIN) {
     gpr_mu_lock(g_mu);
     if (cl->client_write_cnt < CLIENT_TOTAL_WRITE_CNT) {
-      cl->write_closure.cb = client_session_write;
-      cl->write_closure.cb_arg = cl;
+      grpc_closure_init(&cl->write_closure, client_session_write, cl,
+                        grpc_schedule_on_exec_ctx);
       grpc_fd_notify_on_write(exec_ctx, cl->em_fd, &cl->write_closure);
       cl->client_write_cnt++;
     } else {
@@ -459,10 +460,10 @@ static void test_grpc_fd_change(void) {
   grpc_closure second_closure;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
-  first_closure.cb = first_read_callback;
-  first_closure.cb_arg = &a;
-  second_closure.cb = second_read_callback;
-  second_closure.cb_arg = &b;
+  grpc_closure_init(&first_closure, first_read_callback, &a,
+                    grpc_schedule_on_exec_ctx);
+  grpc_closure_init(&second_closure, second_read_callback, &b,
+                    grpc_schedule_on_exec_ctx);
 
   init_change_data(&a);
   init_change_data(&b);
@@ -546,11 +547,13 @@ int main(int argc, char **argv) {
   grpc_pollset_init(g_pollset, &g_mu);
   test_grpc_fd();
   test_grpc_fd_change();
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_exec_ctx_flush(&exec_ctx);
   gpr_free(g_pollset);
-  grpc_iomgr_shutdown();
+  grpc_iomgr_shutdown(&exec_ctx);
+  grpc_exec_ctx_finish(&exec_ctx);
   return 0;
 }
 
diff --git a/test/core/iomgr/pollset_set_test.c b/test/core/iomgr/pollset_set_test.c
new file mode 100644
index 0000000000..40fa858602
--- /dev/null
+++ b/test/core/iomgr/pollset_set_test.c
@@ -0,0 +1,467 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include "src/core/lib/iomgr/port.h"
+
+/* This test only relevant on linux systems where epoll is available */
+#ifdef GRPC_LINUX_EPOLL
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "test/core/util/test_config.h"
+
+/*******************************************************************************
+ * test_pollset_set
+ */
+
+typedef struct test_pollset_set { grpc_pollset_set *pss; } test_pollset_set;
+
+void init_test_pollset_sets(test_pollset_set *pollset_sets, const int num_pss) {
+  for (int i = 0; i < num_pss; i++) {
+    pollset_sets[i].pss = grpc_pollset_set_create();
+  }
+}
+
+void cleanup_test_pollset_sets(test_pollset_set *pollset_sets,
+                               const int num_pss) {
+  for (int i = 0; i < num_pss; i++) {
+    grpc_pollset_set_destroy(pollset_sets[i].pss);
+    pollset_sets[i].pss = NULL;
+  }
+}
+
+/*******************************************************************************
+ * test_pollset
+ */
+
+typedef struct test_pollset {
+  grpc_pollset *ps;
+  gpr_mu *mu;
+} test_pollset;
+
+static void init_test_pollsets(test_pollset *pollsets, const int num_pollsets) {
+  for (int i = 0; i < num_pollsets; i++) {
+    pollsets[i].ps = gpr_malloc(grpc_pollset_size());
+    grpc_pollset_init(pollsets[i].ps, &pollsets[i].mu);
+  }
+}
+
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
+                            grpc_error *error) {
+  grpc_pollset_destroy(p);
+}
+
+static void cleanup_test_pollsets(grpc_exec_ctx *exec_ctx,
+                                  test_pollset *pollsets,
+                                  const int num_pollsets) {
+  grpc_closure destroyed;
+  for (int i = 0; i < num_pollsets; i++) {
+    grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].ps,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(exec_ctx, pollsets[i].ps, &destroyed);
+
+    grpc_exec_ctx_flush(exec_ctx);
+    gpr_free(pollsets[i].ps);
+    pollsets[i].ps = NULL;
+  }
+}
+
+/*******************************************************************************
+ * test_fd
+ */
+
+typedef struct test_fd {
+  grpc_fd *fd;
+  grpc_wakeup_fd wakeup_fd;
+
+  bool is_on_readable_called; /* Is on_readable closure is called ? */
+  grpc_closure on_readable;   /* Closure to call when this fd is readable */
+} test_fd;
+
+void on_readable(grpc_exec_ctx *exec_ctx, void *tfd, grpc_error *error) {
+  ((test_fd *)tfd)->is_on_readable_called = true;
+}
+
+static void reset_test_fd(grpc_exec_ctx *exec_ctx, test_fd *tfd) {
+  tfd->is_on_readable_called = false;
+
+  grpc_closure_init(&tfd->on_readable, on_readable, tfd,
+                    grpc_schedule_on_exec_ctx);
+  grpc_fd_notify_on_read(exec_ctx, tfd->fd, &tfd->on_readable);
+}
+
+static void init_test_fds(grpc_exec_ctx *exec_ctx, test_fd *tfds,
+                          const int num_fds) {
+  for (int i = 0; i < num_fds; i++) {
+    GPR_ASSERT(GRPC_ERROR_NONE == grpc_wakeup_fd_init(&tfds[i].wakeup_fd));
+    tfds[i].fd = grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&tfds[i].wakeup_fd),
+                                "test_fd");
+    reset_test_fd(exec_ctx, &tfds[i]);
+  }
+}
+
+static void cleanup_test_fds(grpc_exec_ctx *exec_ctx, test_fd *tfds,
+                             const int num_fds) {
+  int release_fd;
+
+  for (int i = 0; i < num_fds; i++) {
+    grpc_fd_shutdown(exec_ctx, tfds[i].fd, GRPC_ERROR_CREATE("fd cleanup"));
+    grpc_exec_ctx_flush(exec_ctx);
+
+    /* grpc_fd_orphan frees the memory allocated for grpc_fd. Normally it also
+     * calls close() on the underlying fd. In our case, we are using
+     * grpc_wakeup_fd and we would like to destroy it ourselves (by calling
+     * grpc_wakeup_fd_destroy). To prevent grpc_fd from calling close() on the
+     * underlying fd, call it with a non-NULL 'release_fd' parameter */
+    grpc_fd_orphan(exec_ctx, tfds[i].fd, NULL, &release_fd, "test_fd_cleanup");
+    grpc_exec_ctx_flush(exec_ctx);
+
+    grpc_wakeup_fd_destroy(&tfds[i].wakeup_fd);
+  }
+}
+
+static void make_test_fds_readable(test_fd *tfds, const int num_fds) {
+  for (int i = 0; i < num_fds; i++) {
+    GPR_ASSERT(GRPC_ERROR_NONE == grpc_wakeup_fd_wakeup(&tfds[i].wakeup_fd));
+  }
+}
+
+static void verify_readable_and_reset(grpc_exec_ctx *exec_ctx, test_fd *tfds,
+                                      const int num_fds) {
+  for (int i = 0; i < num_fds; i++) {
+    /* Verify that the on_readable callback was called */
+    GPR_ASSERT(tfds[i].is_on_readable_called);
+
+    /* Reset the tfd[i] structure */
+    GPR_ASSERT(GRPC_ERROR_NONE ==
+               grpc_wakeup_fd_consume_wakeup(&tfds[i].wakeup_fd));
+    reset_test_fd(exec_ctx, &tfds[i]);
+  }
+}
+
+/*******************************************************************************
+ * Main tests
+ */
+
+/* Test some typical scenarios in pollset_set */
+static void pollset_set_test_basic() {
+  /* We construct the following structure for this test:
+   *
+   *        +---> FD0 (Added before PSS1, PS1 and PS2 are added to PSS0)
+   *        |
+   *        +---> FD5 (Added after PSS1, PS1 and PS2 are added to PSS0)
+   *        |
+   *        |
+   *        |           +---> FD1 (Added before PSS1 is added to PSS0)
+   *        |           |
+   *        |           +---> FD6 (Added after PSS1 is added to PSS0)
+   *        |           |
+   *        +---> PSS1--+           +--> FD2 (Added before PS0 is added to PSS1)
+   *        |           |           |
+   *        |           +---> PS0---+
+   *        |                       |
+   * PSS0---+                       +--> FD7 (Added after PS0 is added to PSS1)
+   *        |
+   *        |
+   *        |           +---> FD3 (Added before PS1 is added to PSS0)
+   *        |           |
+   *        +---> PS1---+
+   *        |           |
+   *        |           +---> FD8 (Added after PS1 added to PSS0)
+   *        |
+   *        |
+   *        |           +---> FD4 (Added before PS2 is added to PSS0)
+   *        |           |
+   *        +---> PS2---+
+   *                    |
+   *                    +---> FD9 (Added after PS2 is added to PSS0)
+   */
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_pollset_worker *worker;
+  gpr_timespec deadline;
+
+  test_fd tfds[10];
+  test_pollset pollsets[3];
+  test_pollset_set pollset_sets[2];
+  const int num_fds = GPR_ARRAY_SIZE(tfds);
+  const int num_ps = GPR_ARRAY_SIZE(pollsets);
+  const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
+
+  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_pollsets(pollsets, num_ps);
+  init_test_pollset_sets(pollset_sets, num_pss);
+
+  /* Construct the pollset_set/pollset/fd tree (see diagram above) */
+
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+
+  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[2].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[3].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[4].fd);
+
+  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
+                                   pollset_sets[1].pss);
+
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
+
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
+
+  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[7].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[8].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[9].fd);
+
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* Test that if any FD in the above structure is readable, it is observable by
+   * doing grpc_pollset_work on any pollset
+   *
+   *   For every pollset, do the following:
+   *     - (Ensure that all FDs are in reset state)
+   *     - Make all FDs readable
+   *     - Call grpc_pollset_work() on the pollset
+   *     - Flush the exec_ctx
+   *     - Verify that on_readable call back was called for all FDs (and
+   *       reset the FDs)
+   * */
+  for (int i = 0; i < num_ps; i++) {
+    make_test_fds_readable(tfds, num_fds);
+
+    gpr_mu_lock(pollsets[i].mu);
+    deadline = grpc_timeout_milliseconds_to_deadline(2);
+    GPR_ASSERT(GRPC_ERROR_NONE ==
+               grpc_pollset_work(&exec_ctx, pollsets[i].ps, &worker,
+                                 gpr_now(GPR_CLOCK_MONOTONIC), deadline));
+    gpr_mu_unlock(pollsets[i].mu);
+
+    grpc_exec_ctx_flush(&exec_ctx);
+
+    verify_readable_and_reset(&exec_ctx, tfds, num_fds);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* Test tear down */
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
+
+  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
+                                   pollset_sets[1].pss);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  cleanup_test_fds(&exec_ctx, tfds, num_fds);
+  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+/* Same FD added multiple times to the pollset_set tree */
+void pollset_set_test_dup_fds() {
+  /* We construct the following structure for this test:
+   *
+   *        +---> FD0
+   *        |
+   *        |
+   * PSS0---+
+   *        |           +---> FD0 (also under PSS0)
+   *        |           |
+   *        +---> PSS1--+           +--> FD1 (also under PSS1)
+   *                    |           |
+   *                    +---> PS ---+
+   *                    |           |
+   *                    |           +--> FD2
+   *                    +---> FD1
+   */
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_pollset_worker *worker;
+  gpr_timespec deadline;
+
+  test_fd tfds[3];
+  test_pollset pollset;
+  test_pollset_set pollset_sets[2];
+  const int num_fds = GPR_ARRAY_SIZE(tfds);
+  const int num_ps = 1;
+  const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
+
+  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_pollsets(&pollset, num_ps);
+  init_test_pollset_sets(pollset_sets, num_pss);
+
+  /* Construct the structure */
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+
+  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[1].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[2].fd);
+
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
+                                   pollset_sets[1].pss);
+
+  /* Test. Make all FDs readable and make sure that can be observed by doing a
+   * grpc_pollset_work on the pollset 'PS' */
+  make_test_fds_readable(tfds, num_fds);
+
+  gpr_mu_lock(pollset.mu);
+  deadline = grpc_timeout_milliseconds_to_deadline(2);
+  GPR_ASSERT(GRPC_ERROR_NONE ==
+             grpc_pollset_work(&exec_ctx, pollset.ps, &worker,
+                               gpr_now(GPR_CLOCK_MONOTONIC), deadline));
+  gpr_mu_unlock(pollset.mu);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* Tear down */
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
+                                   pollset_sets[1].pss);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  cleanup_test_fds(&exec_ctx, tfds, num_fds);
+  cleanup_test_pollsets(&exec_ctx, &pollset, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+/* Pollset_set with an empty pollset */
+void pollset_set_test_empty_pollset() {
+  /* We construct the following structure for this test:
+   *
+   *        +---> PS0 (EMPTY)
+   *        |
+   *        +---> FD0
+   *        |
+   * PSS0---+
+   *        |          +---> FD1
+   *        |          |
+   *        +---> PS1--+
+   *                   |
+   *                   +---> FD2
+   */
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_pollset_worker *worker;
+  gpr_timespec deadline;
+
+  test_fd tfds[3];
+  test_pollset pollsets[2];
+  test_pollset_set pollset_set;
+  const int num_fds = GPR_ARRAY_SIZE(tfds);
+  const int num_ps = GPR_ARRAY_SIZE(pollsets);
+  const int num_pss = 1;
+
+  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_pollsets(pollsets, num_ps);
+  init_test_pollset_sets(&pollset_set, num_pss);
+
+  /* Construct the structure */
+  grpc_pollset_set_add_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[1].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[2].fd);
+
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
+
+  /* Test. Make all FDs readable and make sure that can be observed by doing
+   * grpc_pollset_work on the empty pollset 'PS0' */
+  make_test_fds_readable(tfds, num_fds);
+
+  gpr_mu_lock(pollsets[0].mu);
+  deadline = grpc_timeout_milliseconds_to_deadline(2);
+  GPR_ASSERT(GRPC_ERROR_NONE ==
+             grpc_pollset_work(&exec_ctx, pollsets[0].ps, &worker,
+                               gpr_now(GPR_CLOCK_MONOTONIC), deadline));
+  gpr_mu_unlock(pollsets[0].mu);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* Tear down */
+  grpc_pollset_set_del_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  cleanup_test_fds(&exec_ctx, tfds, num_fds);
+  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
+  cleanup_test_pollset_sets(&pollset_set, num_pss);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char **argv) {
+  const char *poll_strategy = grpc_get_poll_strategy_name();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_test_init(argc, argv);
+  grpc_iomgr_init();
+
+  if (poll_strategy != NULL && strcmp(poll_strategy, "epoll") == 0) {
+    pollset_set_test_basic();
+    pollset_set_test_dup_fds();
+    pollset_set_test_empty_pollset();
+  } else {
+    gpr_log(GPR_INFO,
+            "Skipping the test. The test is only relevant for 'epoll' "
+            "strategy. and the current strategy is: '%s'",
+            poll_strategy);
+  }
+
+  grpc_iomgr_shutdown(&exec_ctx);
+  grpc_exec_ctx_finish(&exec_ctx);
+  return 0;
+}
+#else /* defined(GRPC_LINUX_EPOLL) */
+int main(int argc, char **argv) { return 0; }
+#endif /* !defined(GRPC_LINUX_EPOLL) */
diff --git a/test/core/iomgr/resolve_address_posix_test.c b/test/core/iomgr/resolve_address_posix_test.c
new file mode 100644
index 0000000000..a4feff8b00
--- /dev/null
+++ b/test/core/iomgr/resolve_address_posix_test.c
@@ -0,0 +1,188 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/resolve_address.h"
+
+#include <string.h>
+#include <sys/un.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr.h"
+#include "test/core/util/test_config.h"
+
+static gpr_timespec test_deadline(void) {
+  return grpc_timeout_seconds_to_deadline(100);
+}
+
+typedef struct args_struct {
+  gpr_event ev;
+  grpc_resolved_addresses *addrs;
+  gpr_atm done_atm;
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  grpc_pollset_set *pollset_set;
+} args_struct;
+
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
+
+void args_init(grpc_exec_ctx *exec_ctx, args_struct *args) {
+  gpr_event_init(&args->ev);
+  args->pollset = gpr_malloc(grpc_pollset_size());
+  grpc_pollset_init(args->pollset, &args->mu);
+  args->pollset_set = grpc_pollset_set_create();
+  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  args->addrs = NULL;
+}
+
+void args_finish(grpc_exec_ctx *exec_ctx, args_struct *args) {
+  GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
+  grpc_resolved_addresses_destroy(args->addrs);
+  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
+  grpc_closure do_nothing_cb;
+  grpc_closure_init(&do_nothing_cb, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
+  grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
+  // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
+  grpc_exec_ctx_flush(exec_ctx);
+  grpc_pollset_destroy(args->pollset);
+  gpr_free(args->pollset);
+}
+
+static gpr_timespec n_sec_deadline(int seconds) {
+  return gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                      gpr_time_from_seconds(seconds, GPR_TIMESPAN));
+}
+
+static void actually_poll(void *argsp) {
+  args_struct *args = argsp;
+  gpr_timespec deadline = n_sec_deadline(10);
+  while (true) {
+    bool done = gpr_atm_acq_load(&args->done_atm) != 0;
+    if (done) {
+      break;
+    }
+    gpr_timespec time_left =
+        gpr_time_sub(deadline, gpr_now(GPR_CLOCK_REALTIME));
+    gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRId64 ".%09d", done,
+            time_left.tv_sec, time_left.tv_nsec);
+    GPR_ASSERT(gpr_time_cmp(time_left, gpr_time_0(GPR_TIMESPAN)) >= 0);
+    grpc_pollset_worker *worker = NULL;
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    gpr_mu_lock(args->mu);
+    GRPC_LOG_IF_ERROR(
+        "pollset_work",
+        grpc_pollset_work(&exec_ctx, args->pollset, &worker,
+                          gpr_now(GPR_CLOCK_REALTIME), n_sec_deadline(1)));
+    gpr_mu_unlock(args->mu);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
+  gpr_event_set(&args->ev, (void *)1);
+}
+
+static void poll_pollset_until_request_done(args_struct *args) {
+  gpr_atm_rel_store(&args->done_atm, 0);
+  gpr_thd_id id;
+  gpr_thd_new(&id, actually_poll, args, NULL);
+}
+
+static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
+                         grpc_error *err) {
+  args_struct *args = argsp;
+  GPR_ASSERT(err == GRPC_ERROR_NONE);
+  GPR_ASSERT(args->addrs != NULL);
+  GPR_ASSERT(args->addrs->naddrs > 0);
+  gpr_atm_rel_store(&args->done_atm, 1);
+}
+
+static void must_fail(grpc_exec_ctx *exec_ctx, void *argsp, grpc_error *err) {
+  args_struct *args = argsp;
+  GPR_ASSERT(err != GRPC_ERROR_NONE);
+  gpr_atm_rel_store(&args->done_atm, 1);
+}
+
+static void test_unix_socket(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  args_struct args;
+  args_init(&exec_ctx, &args);
+  poll_pollset_until_request_done(&args);
+  grpc_resolve_address(
+      &exec_ctx, "unix:/path/name", NULL, args.pollset_set,
+      grpc_closure_create(must_succeed, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
+  args_finish(&exec_ctx, &args);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void test_unix_socket_path_name_too_long(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  args_struct args;
+  args_init(&exec_ctx, &args);
+  const char prefix[] = "unix:/path/name";
+  size_t path_name_length =
+      GPR_ARRAY_SIZE(((struct sockaddr_un *)0)->sun_path) + 6;
+  char *path_name = gpr_malloc(sizeof(char) * path_name_length);
+  memset(path_name, 'a', path_name_length);
+  memcpy(path_name, prefix, strlen(prefix) - 1);
+  path_name[path_name_length - 1] = '\0';
+
+  poll_pollset_until_request_done(&args);
+  grpc_resolve_address(
+      &exec_ctx, path_name, NULL, args.pollset_set,
+      grpc_closure_create(must_fail, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
+  gpr_free(path_name);
+  args_finish(&exec_ctx, &args);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  grpc_executor_init();
+  grpc_iomgr_init();
+  test_unix_socket();
+  test_unix_socket_path_name_too_long();
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_executor_shutdown(&exec_ctx);
+    grpc_iomgr_shutdown(&exec_ctx);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
+  return 0;
+}
diff --git a/test/core/iomgr/resolve_address_test.c b/test/core/iomgr/resolve_address_test.c
index e4136a7a7a..54de9a20e1 100644
--- a/test/core/iomgr/resolve_address_test.c
+++ b/test/core/iomgr/resolve_address_test.c
@@ -42,7 +42,7 @@
 #include "test/core/util/test_config.h"
 
 static gpr_timespec test_deadline(void) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(100);
+  return grpc_timeout_seconds_to_deadline(100);
 }
 
 typedef struct args_struct {
@@ -71,7 +71,8 @@ void args_finish(grpc_exec_ctx *exec_ctx, args_struct *args) {
   grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
   grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure do_nothing_cb;
-  grpc_closure_init(&do_nothing_cb, do_nothing, NULL);
+  grpc_closure_init(&do_nothing_cb, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
   grpc_exec_ctx_flush(exec_ctx);
@@ -136,8 +137,10 @@ static void test_localhost(void) {
   args_struct args;
   args_init(&exec_ctx, &args);
   poll_pollset_until_request_done(&args);
-  grpc_resolve_address(&exec_ctx, "localhost:1", NULL, args.pollset_set,
-                       grpc_closure_create(must_succeed, &args), &args.addrs);
+  grpc_resolve_address(
+      &exec_ctx, "localhost:1", NULL, args.pollset_set,
+      grpc_closure_create(must_succeed, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
   args_finish(&exec_ctx, &args);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -147,8 +150,10 @@ static void test_default_port(void) {
   args_struct args;
   args_init(&exec_ctx, &args);
   poll_pollset_until_request_done(&args);
-  grpc_resolve_address(&exec_ctx, "localhost", "1", args.pollset_set,
-                       grpc_closure_create(must_succeed, &args), &args.addrs);
+  grpc_resolve_address(
+      &exec_ctx, "localhost", "1", args.pollset_set,
+      grpc_closure_create(must_succeed, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
   args_finish(&exec_ctx, &args);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -158,8 +163,10 @@ static void test_missing_default_port(void) {
   args_struct args;
   args_init(&exec_ctx, &args);
   poll_pollset_until_request_done(&args);
-  grpc_resolve_address(&exec_ctx, "localhost", NULL, args.pollset_set,
-                       grpc_closure_create(must_fail, &args), &args.addrs);
+  grpc_resolve_address(
+      &exec_ctx, "localhost", NULL, args.pollset_set,
+      grpc_closure_create(must_fail, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
   args_finish(&exec_ctx, &args);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -169,8 +176,10 @@ static void test_ipv6_with_port(void) {
   args_struct args;
   args_init(&exec_ctx, &args);
   poll_pollset_until_request_done(&args);
-  grpc_resolve_address(&exec_ctx, "[2001:db8::1]:1", NULL, args.pollset_set,
-                       grpc_closure_create(must_succeed, &args), &args.addrs);
+  grpc_resolve_address(
+      &exec_ctx, "[2001:db8::1]:1", NULL, args.pollset_set,
+      grpc_closure_create(must_succeed, &args, grpc_schedule_on_exec_ctx),
+      &args.addrs);
   args_finish(&exec_ctx, &args);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -185,8 +194,10 @@ static void test_ipv6_without_port(void) {
     args_struct args;
     args_init(&exec_ctx, &args);
     poll_pollset_until_request_done(&args);
-    grpc_resolve_address(&exec_ctx, kCases[i], "80", args.pollset_set,
-                         grpc_closure_create(must_succeed, &args), &args.addrs);
+    grpc_resolve_address(
+        &exec_ctx, kCases[i], "80", args.pollset_set,
+        grpc_closure_create(must_succeed, &args, grpc_schedule_on_exec_ctx),
+        &args.addrs);
     args_finish(&exec_ctx, &args);
     grpc_exec_ctx_finish(&exec_ctx);
   }
@@ -202,8 +213,10 @@ static void test_invalid_ip_addresses(void) {
     args_struct args;
     args_init(&exec_ctx, &args);
     poll_pollset_until_request_done(&args);
-    grpc_resolve_address(&exec_ctx, kCases[i], NULL, args.pollset_set,
-                         grpc_closure_create(must_fail, &args), &args.addrs);
+    grpc_resolve_address(
+        &exec_ctx, kCases[i], NULL, args.pollset_set,
+        grpc_closure_create(must_fail, &args, grpc_schedule_on_exec_ctx),
+        &args.addrs);
     args_finish(&exec_ctx, &args);
     grpc_exec_ctx_finish(&exec_ctx);
   }
@@ -219,8 +232,10 @@ static void test_unparseable_hostports(void) {
     args_struct args;
     args_init(&exec_ctx, &args);
     poll_pollset_until_request_done(&args);
-    grpc_resolve_address(&exec_ctx, kCases[i], "1", args.pollset_set,
-                         grpc_closure_create(must_fail, &args), &args.addrs);
+    grpc_resolve_address(
+        &exec_ctx, kCases[i], "1", args.pollset_set,
+        grpc_closure_create(must_fail, &args, grpc_schedule_on_exec_ctx),
+        &args.addrs);
     args_finish(&exec_ctx, &args);
     grpc_exec_ctx_finish(&exec_ctx);
   }
@@ -237,7 +252,11 @@ int main(int argc, char **argv) {
   test_ipv6_without_port();
   test_invalid_ip_addresses();
   test_unparseable_hostports();
-  grpc_iomgr_shutdown();
-  grpc_executor_shutdown();
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_executor_shutdown(&exec_ctx);
+    grpc_iomgr_shutdown(&exec_ctx);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   return 0;
 }
diff --git a/test/core/iomgr/resource_quota_test.c b/test/core/iomgr/resource_quota_test.c
index a82d44f7f8..a5b28f210d 100644
--- a/test/core/iomgr/resource_quota_test.c
+++ b/test/core/iomgr/resource_quota_test.c
@@ -36,6 +36,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
 static void inc_int_cb(grpc_exec_ctx *exec_ctx, void *a, grpc_error *error) {
@@ -45,7 +46,9 @@ static void inc_int_cb(grpc_exec_ctx *exec_ctx, void *a, grpc_error *error) {
 static void set_bool_cb(grpc_exec_ctx *exec_ctx, void *a, grpc_error *error) {
   *(bool *)a = true;
 }
-grpc_closure *set_bool(bool *p) { return grpc_closure_create(set_bool_cb, p); }
+grpc_closure *set_bool(bool *p) {
+  return grpc_closure_create(set_bool_cb, p, grpc_schedule_on_exec_ctx);
+}
 
 typedef struct {
   size_t size;
@@ -67,7 +70,7 @@ grpc_closure *make_reclaimer(grpc_resource_user *resource_user, size_t size,
   a->size = size;
   a->resource_user = resource_user;
   a->then = then;
-  return grpc_closure_create(reclaimer_cb, a);
+  return grpc_closure_create(reclaimer_cb, a, grpc_schedule_on_exec_ctx);
 }
 
 static void unused_reclaimer_cb(grpc_exec_ctx *exec_ctx, void *arg,
@@ -76,7 +79,8 @@ static void unused_reclaimer_cb(grpc_exec_ctx *exec_ctx, void *arg,
   grpc_closure_run(exec_ctx, arg, GRPC_ERROR_NONE);
 }
 grpc_closure *make_unused_reclaimer(grpc_closure *then) {
-  return grpc_closure_create(unused_reclaimer_cb, then);
+  return grpc_closure_create(unused_reclaimer_cb, then,
+                             grpc_schedule_on_exec_ctx);
 }
 
 static void destroy_user(grpc_resource_user *usr) {
@@ -631,7 +635,11 @@ static void test_one_slice(void) {
     GPR_ASSERT(num_allocs == start_allocs + 1);
   }
 
-  grpc_slice_buffer_destroy(&buffer);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   destroy_user(usr);
   grpc_resource_quota_unref(q);
 }
@@ -667,7 +675,11 @@ static void test_one_slice_deleted_late(void) {
   }
 
   grpc_resource_quota_unref(q);
-  grpc_slice_buffer_destroy(&buffer);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index 5fab826fb7..dcdff8efb1 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -57,7 +57,7 @@ static int g_connections_complete = 0;
 static grpc_endpoint *g_connecting = NULL;
 
 static gpr_timespec test_deadline(void) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+  return grpc_timeout_seconds_to_deadline(10);
 }
 
 static void finish_connection() {
@@ -72,7 +72,8 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *arg,
                          grpc_error *error) {
   GPR_ASSERT(g_connecting != NULL);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_endpoint_shutdown(exec_ctx, g_connecting);
+  grpc_endpoint_shutdown(exec_ctx, g_connecting,
+                         GRPC_ERROR_CREATE("must_succeed called"));
   grpc_endpoint_destroy(exec_ctx, g_connecting);
   g_connecting = NULL;
   finish_connection();
@@ -113,7 +114,7 @@ void test_succeeds(void) {
   /* connect to it */
   GPR_ASSERT(getsockname(svr_fd, (struct sockaddr *)addr,
                          (socklen_t *)&resolved_addr.len) == 0);
-  grpc_closure_init(&done, must_succeed, NULL);
+  grpc_closure_init(&done, must_succeed, NULL, grpc_schedule_on_exec_ctx);
   grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set, NULL,
                           &resolved_addr, gpr_inf_future(GPR_CLOCK_REALTIME));
 
@@ -134,7 +135,7 @@ void test_succeeds(void) {
         "pollset_work",
         grpc_pollset_work(&exec_ctx, g_pollset, &worker,
                           gpr_now(GPR_CLOCK_MONOTONIC),
-                          GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5))));
+                          grpc_timeout_seconds_to_deadline(5))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_flush(&exec_ctx);
     gpr_mu_lock(g_mu);
@@ -163,7 +164,7 @@ void test_fails(void) {
   gpr_mu_unlock(g_mu);
 
   /* connect to a broken address */
-  grpc_closure_init(&done, must_fail, NULL);
+  grpc_closure_init(&done, must_fail, NULL, grpc_schedule_on_exec_ctx);
   grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set, NULL,
                           &resolved_addr, gpr_inf_future(GPR_CLOCK_REALTIME));
 
@@ -207,7 +208,8 @@ int main(int argc, char **argv) {
   gpr_log(GPR_ERROR, "End of first test");
   test_fails();
   grpc_pollset_set_destroy(g_pollset_set);
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.c
index 5eafa570bb..99ecd581c6 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.c
@@ -50,6 +50,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
+
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/iomgr/endpoint_tests.h"
 #include "test/core/util/test_config.h"
 
@@ -173,7 +175,7 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   grpc_endpoint *ep;
   struct read_socket_state state;
   size_t written_bytes;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(20);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_INFO, "Read test of size %" PRIuPTR ", slice size %" PRIuPTR,
@@ -184,7 +186,7 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   grpc_resource_quota *resource_quota = grpc_resource_quota_create("read_test");
   ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), resource_quota,
                        slice_size, "test");
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
@@ -194,7 +196,7 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   state.read_bytes = 0;
   state.target_read_bytes = written_bytes;
   grpc_slice_buffer_init(&state.incoming);
-  grpc_closure_init(&state.read_cb, read_cb, &state);
+  grpc_closure_init(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
   grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
 
@@ -212,7 +214,7 @@ static void read_test(size_t num_bytes, size_t slice_size) {
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy(&state.incoming);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
   grpc_endpoint_destroy(&exec_ctx, ep);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -224,7 +226,7 @@ static void large_read_test(size_t slice_size) {
   grpc_endpoint *ep;
   struct read_socket_state state;
   ssize_t written_bytes;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(20);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_INFO, "Start large read test, slice size %" PRIuPTR, slice_size);
@@ -235,7 +237,7 @@ static void large_read_test(size_t slice_size) {
       grpc_resource_quota_create("large_read_test");
   ep = grpc_tcp_create(grpc_fd_create(sv[1], "large_read_test"), resource_quota,
                        slice_size, "test");
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
 
   written_bytes = fill_socket(sv[0]);
@@ -245,7 +247,7 @@ static void large_read_test(size_t slice_size) {
   state.read_bytes = 0;
   state.target_read_bytes = (size_t)written_bytes;
   grpc_slice_buffer_init(&state.incoming);
-  grpc_closure_init(&state.read_cb, read_cb, &state);
+  grpc_closure_init(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
   grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
 
@@ -263,7 +265,7 @@ static void large_read_test(size_t slice_size) {
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy(&state.incoming);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
   grpc_endpoint_destroy(&exec_ctx, ep);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -328,7 +330,7 @@ void drain_socket_blocking(int fd, size_t num_bytes, size_t read_size) {
         "pollset_work",
         grpc_pollset_work(&exec_ctx, g_pollset, &worker,
                           gpr_now(GPR_CLOCK_MONOTONIC),
-                          GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10))));
+                          grpc_timeout_milliseconds_to_deadline(10))));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(&exec_ctx);
     do {
@@ -361,7 +363,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   uint8_t current_data = 0;
   grpc_slice_buffer outgoing;
   grpc_closure write_done_closure;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(20);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_INFO,
@@ -374,7 +376,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
       grpc_resource_quota_create("write_test");
   ep = grpc_tcp_create(grpc_fd_create(sv[1], "write_test"), resource_quota,
                        GRPC_TCP_DEFAULT_READ_SLICE_SIZE, "test");
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
 
   state.ep = ep;
@@ -384,7 +386,8 @@ static void write_test(size_t num_bytes, size_t slice_size) {
 
   grpc_slice_buffer_init(&outgoing);
   grpc_slice_buffer_addn(&outgoing, slices, num_blocks);
-  grpc_closure_init(&write_done_closure, write_done, &state);
+  grpc_closure_init(&write_done_closure, write_done, &state,
+                    grpc_schedule_on_exec_ctx);
 
   grpc_endpoint_write(&exec_ctx, ep, &outgoing, &write_done_closure);
   drain_socket_blocking(sv[0], num_bytes, num_bytes);
@@ -404,7 +407,7 @@ static void write_test(size_t num_bytes, size_t slice_size) {
   }
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy(&outgoing);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
   grpc_endpoint_destroy(&exec_ctx, ep);
   gpr_free(slices);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -425,11 +428,12 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   struct read_socket_state state;
   size_t written_bytes;
   int fd;
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(20);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(20);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_closure fd_released_cb;
   int fd_released_done = 0;
-  grpc_closure_init(&fd_released_cb, &on_fd_released, &fd_released_done);
+  grpc_closure_init(&fd_released_cb, &on_fd_released, &fd_released_done,
+                    grpc_schedule_on_exec_ctx);
 
   gpr_log(GPR_INFO,
           "Release fd read_test of size %" PRIuPTR ", slice size %" PRIuPTR,
@@ -442,7 +446,7 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), resource_quota,
                        slice_size, "test");
   GPR_ASSERT(grpc_tcp_fd(ep) == sv[1] && sv[1] >= 0);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
@@ -452,7 +456,7 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   state.read_bytes = 0;
   state.target_read_bytes = written_bytes;
   grpc_slice_buffer_init(&state.incoming);
-  grpc_closure_init(&state.read_cb, read_cb, &state);
+  grpc_closure_init(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
   grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
 
@@ -472,7 +476,7 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy(&state.incoming);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
   grpc_tcp_destroy_and_release_fd(&exec_ctx, ep, &fd, &fd_released_cb);
   grpc_exec_ctx_flush(&exec_ctx);
   gpr_mu_lock(g_mu);
@@ -534,7 +538,7 @@ static grpc_endpoint_test_fixture create_fixture_tcp_socketpair(
                                 resource_quota, slice_size, "test");
   f.server_ep = grpc_tcp_create(grpc_fd_create(sv[1], "fixture:server"),
                                 resource_quota, slice_size, "test");
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
   grpc_endpoint_add_to_pollset(&exec_ctx, f.server_ep, g_pollset);
 
@@ -561,7 +565,8 @@ int main(int argc, char **argv) {
   grpc_pollset_init(g_pollset, &g_mu);
   grpc_endpoint_tests(configs[0], g_pollset, g_mu);
   run_tests();
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index 9a7810e227..7122cd1e86 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -104,7 +104,7 @@ static void server_weak_ref_shutdown(grpc_exec_ctx *exec_ctx, void *arg,
 static void server_weak_ref_init(server_weak_ref *weak_ref) {
   weak_ref->server = NULL;
   grpc_closure_init(&weak_ref->server_shutdown, server_weak_ref_shutdown,
-                    weak_ref);
+                    weak_ref, grpc_schedule_on_exec_ctx);
 }
 
 /* Make weak_ref->server_shutdown a shutdown_starting cb on server.
@@ -121,7 +121,7 @@ static void server_weak_ref_set(server_weak_ref *weak_ref,
 static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
                        grpc_pollset *pollset,
                        grpc_tcp_server_acceptor *acceptor) {
-  grpc_endpoint_shutdown(exec_ctx, tcp);
+  grpc_endpoint_shutdown(exec_ctx, tcp, GRPC_ERROR_CREATE("Connected"));
   grpc_endpoint_destroy(exec_ctx, tcp);
 
   on_connect_result temp_result;
@@ -202,7 +202,7 @@ static void test_no_op_with_port_and_start(void) {
 
 static void tcp_connect(grpc_exec_ctx *exec_ctx, const struct sockaddr *remote,
                         socklen_t remote_len, on_connect_result *result) {
-  gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+  gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   int clifd = socket(remote->sa_family, SOCK_STREAM, 0);
   int nconnects_before;
 
@@ -366,7 +366,8 @@ int main(int argc, char **argv) {
   test_connect(1);
   test_connect(10);
 
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/iomgr/timer_list_test.c b/test/core/iomgr/timer_list_test.c
index be8988ab75..8d7ac3fdaa 100644
--- a/test/core/iomgr/timer_list_test.c
+++ b/test/core/iomgr/timer_list_test.c
@@ -57,17 +57,20 @@ static void add_test(void) {
 
   /* 10 ms timers.  will expire in the current epoch */
   for (i = 0; i < 10; i++) {
-    grpc_timer_init(&exec_ctx, &timers[i],
-                    gpr_time_add(start, gpr_time_from_millis(10, GPR_TIMESPAN)),
-                    cb, (void *)(intptr_t)i, start);
+    grpc_timer_init(
+        &exec_ctx, &timers[i],
+        gpr_time_add(start, gpr_time_from_millis(10, GPR_TIMESPAN)),
+        grpc_closure_create(cb, (void *)(intptr_t)i, grpc_schedule_on_exec_ctx),
+        start);
   }
 
   /* 1010 ms timers.  will expire in the next epoch */
   for (i = 10; i < 20; i++) {
     grpc_timer_init(
         &exec_ctx, &timers[i],
-        gpr_time_add(start, gpr_time_from_millis(1010, GPR_TIMESPAN)), cb,
-        (void *)(intptr_t)i, start);
+        gpr_time_add(start, gpr_time_from_millis(1010, GPR_TIMESPAN)),
+        grpc_closure_create(cb, (void *)(intptr_t)i, grpc_schedule_on_exec_ctx),
+        start);
   }
 
   /* collect timers.  Only the first batch should be ready. */
@@ -125,16 +128,26 @@ void destruction_test(void) {
   grpc_timer_list_init(gpr_time_0(GPR_CLOCK_REALTIME));
   memset(cb_called, 0, sizeof(cb_called));
 
-  grpc_timer_init(&exec_ctx, &timers[0], tfm(100), cb, (void *)(intptr_t)0,
-                  gpr_time_0(GPR_CLOCK_REALTIME));
-  grpc_timer_init(&exec_ctx, &timers[1], tfm(3), cb, (void *)(intptr_t)1,
-                  gpr_time_0(GPR_CLOCK_REALTIME));
-  grpc_timer_init(&exec_ctx, &timers[2], tfm(100), cb, (void *)(intptr_t)2,
-                  gpr_time_0(GPR_CLOCK_REALTIME));
-  grpc_timer_init(&exec_ctx, &timers[3], tfm(3), cb, (void *)(intptr_t)3,
-                  gpr_time_0(GPR_CLOCK_REALTIME));
-  grpc_timer_init(&exec_ctx, &timers[4], tfm(1), cb, (void *)(intptr_t)4,
-                  gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_timer_init(
+      &exec_ctx, &timers[0], tfm(100),
+      grpc_closure_create(cb, (void *)(intptr_t)0, grpc_schedule_on_exec_ctx),
+      gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_timer_init(
+      &exec_ctx, &timers[1], tfm(3),
+      grpc_closure_create(cb, (void *)(intptr_t)1, grpc_schedule_on_exec_ctx),
+      gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_timer_init(
+      &exec_ctx, &timers[2], tfm(100),
+      grpc_closure_create(cb, (void *)(intptr_t)2, grpc_schedule_on_exec_ctx),
+      gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_timer_init(
+      &exec_ctx, &timers[3], tfm(3),
+      grpc_closure_create(cb, (void *)(intptr_t)3, grpc_schedule_on_exec_ctx),
+      gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_timer_init(
+      &exec_ctx, &timers[4], tfm(1),
+      grpc_closure_create(cb, (void *)(intptr_t)4, grpc_schedule_on_exec_ctx),
+      gpr_time_0(GPR_CLOCK_REALTIME));
   GPR_ASSERT(1 == grpc_timer_check(&exec_ctx, tfm(2), NULL));
   grpc_exec_ctx_finish(&exec_ctx);
   GPR_ASSERT(1 == cb_called[4][1]);
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.c
index 9bea229466..ba572017a2 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.c
@@ -58,6 +58,7 @@
 static grpc_pollset *g_pollset;
 static gpr_mu *g_mu;
 static int g_number_of_reads = 0;
+static int g_number_of_writes = 0;
 static int g_number_of_bytes_read = 0;
 static int g_number_of_orphan_calls = 0;
 
@@ -78,7 +79,16 @@ static void on_read(grpc_exec_ctx *exec_ctx, grpc_fd *emfd,
   gpr_mu_unlock(g_mu);
 }
 
-static void on_fd_orphaned(grpc_fd *emfd) {
+static void on_write(grpc_exec_ctx *exec_ctx, grpc_fd *emfd) {
+  gpr_mu_lock(g_mu);
+  g_number_of_writes++;
+
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
+  gpr_mu_unlock(g_mu);
+}
+
+static void on_fd_orphaned(grpc_exec_ctx *exec_ctx, grpc_fd *emfd) {
   gpr_log(GPR_INFO, "gRPC FD about to be orphaned: %d",
           grpc_fd_wrapped_fd(emfd));
   g_number_of_orphan_calls++;
@@ -111,8 +121,8 @@ static void test_no_op_with_port(void) {
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   resolved_addr.len = sizeof(struct sockaddr_in);
   addr->sin_family = AF_INET;
-  GPR_ASSERT(
-      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
+  GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
+                                      on_fd_orphaned));
 
   grpc_udp_server_destroy(&exec_ctx, s, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -132,8 +142,8 @@ static void test_no_op_with_port_and_start(void) {
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   resolved_addr.len = sizeof(struct sockaddr_in);
   addr->sin_family = AF_INET;
-  GPR_ASSERT(
-      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
+  GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
+                                      on_fd_orphaned));
 
   grpc_udp_server_start(&exec_ctx, s, NULL, 0, NULL);
 
@@ -164,8 +174,8 @@ static void test_receive(int number_of_clients) {
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   resolved_addr.len = sizeof(struct sockaddr_storage);
   addr->ss_family = AF_INET;
-  GPR_ASSERT(
-      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
+  GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
+                                      on_fd_orphaned));
 
   svrfd = grpc_udp_server_get_fd(s, 0);
   GPR_ASSERT(svrfd >= 0);
@@ -179,7 +189,7 @@ static void test_receive(int number_of_clients) {
   gpr_mu_lock(g_mu);
 
   for (i = 0; i < number_of_clients; i++) {
-    deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+    deadline = grpc_timeout_seconds_to_deadline(10);
 
     number_of_reads_before = g_number_of_reads;
     /* Create a socket, send a packet to the UDP server. */
@@ -212,6 +222,9 @@ static void test_receive(int number_of_clients) {
   /* The server had a single FD, which is orphaned once in *
    * deactivated_all_ports, and once in grpc_udp_server_destroy. */
   GPR_ASSERT(g_number_of_orphan_calls == 2);
+
+  /* The write callback should have fired a few times. */
+  GPR_ASSERT(g_number_of_writes > 0);
 }
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
@@ -234,11 +247,12 @@ int main(int argc, char **argv) {
   test_receive(1);
   test_receive(10);
 
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   gpr_free(g_pollset);
-  grpc_iomgr_shutdown();
+  grpc_shutdown();
   return 0;
 }
 
diff --git a/test/core/json/BUILD b/test/core/json/BUILD
new file mode 100644
index 0000000000..05d4c6e0c5
--- /dev/null
+++ b/test/core/json/BUILD
@@ -0,0 +1,41 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
+
+grpc_fuzzer(
+  name = "json_fuzzer",
+  srcs = ["fuzzer.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "corpus",
+  copts = ["-std=c99"],
+)
+
diff --git a/test/core/memory_usage/client.c b/test/core/memory_usage/client.c
new file mode 100644
index 0000000000..09f0e2d867
--- /dev/null
+++ b/test/core/memory_usage/client.c
@@ -0,0 +1,315 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/lib/support/string.h"
+#include "test/core/util/memory_counters.h"
+#include "test/core/util/test_config.h"
+
+static grpc_channel *channel;
+static grpc_completion_queue *cq;
+static grpc_op metadata_ops[2];
+static grpc_op status_ops[2];
+static grpc_op snapshot_ops[6];
+static grpc_op *op;
+
+typedef struct {
+  grpc_call *call;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_status_code status;
+  grpc_slice details;
+  grpc_metadata_array trailing_metadata_recv;
+} fling_call;
+
+// Statically allocate call data structs. Enough to accomodate 10000 ping-pong
+// calls and 1 extra for the snapshot calls.
+static fling_call calls[10001];
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+// A call is intentionally divided into two steps. First step is to initiate a
+// call (i.e send and recv metadata). A call is outstanding after we initated,
+// so we can measure the call memory usage.
+static void init_ping_pong_request(int call_idx) {
+  grpc_metadata_array_init(&calls[call_idx].initial_metadata_recv);
+
+  memset(metadata_ops, 0, sizeof(metadata_ops));
+  op = metadata_ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = GRPC_INITIAL_METADATA_WAIT_FOR_READY;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &calls[call_idx].initial_metadata_recv;
+  op++;
+
+  grpc_slice hostname = grpc_slice_from_static_string("localhost");
+  calls[call_idx].call = grpc_channel_create_call(
+      channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+      grpc_slice_from_static_string("/Reflector/reflectUnary"), &hostname,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(calls[call_idx].call,
+                                                   metadata_ops,
+                                                   (size_t)(op - metadata_ops),
+                                                   tag(call_idx), NULL));
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+}
+
+// Second step is to finish the call (i.e recv status) and destroy the call.
+static void finish_ping_pong_request(int call_idx) {
+  grpc_metadata_array_init(&calls[call_idx].trailing_metadata_recv);
+
+  memset(status_ops, 0, sizeof(status_ops));
+  op = status_ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata =
+      &calls[call_idx].trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &calls[call_idx].status;
+  op->data.recv_status_on_client.status_details = &calls[call_idx].details;
+  op++;
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(calls[call_idx].call,
+                                                   status_ops,
+                                                   (size_t)(op - status_ops),
+                                                   tag(call_idx), NULL));
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  grpc_metadata_array_destroy(&calls[call_idx].initial_metadata_recv);
+  grpc_metadata_array_destroy(&calls[call_idx].trailing_metadata_recv);
+  grpc_slice_unref(calls[call_idx].details);
+  grpc_call_destroy(calls[call_idx].call);
+  calls[call_idx].call = NULL;
+}
+
+static struct grpc_memory_counters send_snapshot_request(int call_idx,
+                                                         grpc_slice call_type) {
+  grpc_metadata_array_init(&calls[call_idx].initial_metadata_recv);
+  grpc_metadata_array_init(&calls[call_idx].trailing_metadata_recv);
+
+  grpc_byte_buffer *response_payload_recv = NULL;
+  memset(snapshot_ops, 0, sizeof(snapshot_ops));
+  op = snapshot_ops;
+
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = GRPC_INITIAL_METADATA_WAIT_FOR_READY;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata =
+      &calls[call_idx].initial_metadata_recv;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &response_payload_recv;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata =
+      &calls[call_idx].trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &calls[call_idx].status;
+  op->data.recv_status_on_client.status_details = &calls[call_idx].details;
+  op++;
+
+  grpc_slice hostname = grpc_slice_from_static_string("localhost");
+  calls[call_idx].call = grpc_channel_create_call(
+      channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq, call_type, &hostname,
+      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(
+                                 calls[call_idx].call, snapshot_ops,
+                                 (size_t)(op - snapshot_ops), (void *)0, NULL));
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, response_payload_recv);
+  grpc_slice response = grpc_byte_buffer_reader_readall(&reader);
+
+  struct grpc_memory_counters snapshot;
+  snapshot.total_size_absolute =
+      ((struct grpc_memory_counters *)GRPC_SLICE_START_PTR(response))
+          ->total_size_absolute;
+  snapshot.total_allocs_absolute =
+      ((struct grpc_memory_counters *)GRPC_SLICE_START_PTR(response))
+          ->total_allocs_absolute;
+  snapshot.total_size_relative =
+      ((struct grpc_memory_counters *)GRPC_SLICE_START_PTR(response))
+          ->total_size_relative;
+  snapshot.total_allocs_relative =
+      ((struct grpc_memory_counters *)GRPC_SLICE_START_PTR(response))
+          ->total_allocs_relative;
+
+  grpc_metadata_array_destroy(&calls[call_idx].initial_metadata_recv);
+  grpc_metadata_array_destroy(&calls[call_idx].trailing_metadata_recv);
+  grpc_slice_unref(response);
+  grpc_byte_buffer_reader_destroy(&reader);
+  grpc_byte_buffer_destroy(response_payload_recv);
+  grpc_slice_unref(calls[call_idx].details);
+  calls[call_idx].details = grpc_empty_slice();
+  grpc_call_destroy(calls[call_idx].call);
+  calls[call_idx].call = NULL;
+
+  return snapshot;
+}
+
+int main(int argc, char **argv) {
+  grpc_memory_counters_init();
+  grpc_slice slice = grpc_slice_from_copied_string("x");
+  char *fake_argv[1];
+
+  char *target = "localhost:443";
+  gpr_cmdline *cl;
+  grpc_event event;
+
+  grpc_init();
+
+  GPR_ASSERT(argc >= 1);
+  fake_argv[0] = argv[0];
+  grpc_test_init(1, fake_argv);
+
+  int warmup_iterations = 100;
+  int benchmark_iterations = 1000;
+
+  cl = gpr_cmdline_create("memory profiling client");
+  gpr_cmdline_add_string(cl, "target", "Target host:port", &target);
+  gpr_cmdline_add_int(cl, "warmup", "Warmup iterations", &warmup_iterations);
+  gpr_cmdline_add_int(cl, "benchmark", "Benchmark iterations",
+                      &benchmark_iterations);
+  gpr_cmdline_parse(cl, argc, argv);
+  gpr_cmdline_destroy(cl);
+
+  for (size_t k = 0; k < GPR_ARRAY_SIZE(calls); k++) {
+    calls[k].details = grpc_empty_slice();
+  }
+
+  cq = grpc_completion_queue_create(NULL);
+
+  struct grpc_memory_counters client_channel_start =
+      grpc_memory_counters_snapshot();
+  channel = grpc_insecure_channel_create(target, NULL, NULL);
+
+  int call_idx = 0;
+
+  struct grpc_memory_counters before_server_create = send_snapshot_request(
+      0, grpc_slice_from_static_string("Reflector/GetBeforeSvrCreation"));
+  struct grpc_memory_counters after_server_create = send_snapshot_request(
+      0, grpc_slice_from_static_string("Reflector/GetAfterSvrCreation"));
+
+  // warmup period
+  for (call_idx = 0; call_idx < warmup_iterations; ++call_idx) {
+    init_ping_pong_request(call_idx + 1);
+  }
+
+  struct grpc_memory_counters server_benchmark_calls_start =
+      send_snapshot_request(
+          0, grpc_slice_from_static_string("Reflector/SimpleSnapshot"));
+
+  struct grpc_memory_counters client_benchmark_calls_start =
+      grpc_memory_counters_snapshot();
+
+  // benchmark period
+  for (; call_idx < warmup_iterations + benchmark_iterations; ++call_idx) {
+    init_ping_pong_request(call_idx + 1);
+  }
+
+  struct grpc_memory_counters client_calls_inflight =
+      grpc_memory_counters_snapshot();
+
+  struct grpc_memory_counters server_calls_inflight = send_snapshot_request(
+      0, grpc_slice_from_static_string("Reflector/DestroyCalls"));
+
+  do {
+    event = grpc_completion_queue_next(
+        cq, gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                         gpr_time_from_micros(10000, GPR_TIMESPAN)),
+        NULL);
+  } while (event.type != GRPC_QUEUE_TIMEOUT);
+
+  // second step - recv status and destroy call
+  for (call_idx = 0; call_idx < warmup_iterations + benchmark_iterations;
+       ++call_idx) {
+    finish_ping_pong_request(call_idx + 1);
+  }
+
+  struct grpc_memory_counters server_calls_end = send_snapshot_request(
+      0, grpc_slice_from_static_string("Reflector/SimpleSnapshot"));
+
+  struct grpc_memory_counters client_channel_end =
+      grpc_memory_counters_snapshot();
+
+  grpc_channel_destroy(channel);
+  grpc_completion_queue_shutdown(cq);
+
+  do {
+    event = grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME),
+                                       NULL);
+  } while (event.type != GRPC_QUEUE_SHUTDOWN);
+  grpc_slice_unref(slice);
+
+  grpc_completion_queue_destroy(cq);
+  grpc_shutdown();
+
+  gpr_log(GPR_INFO, "---------client stats--------");
+  gpr_log(GPR_INFO, "client call memory usage: %f bytes per call",
+          (double)(client_calls_inflight.total_size_relative -
+                   client_benchmark_calls_start.total_size_relative) /
+              benchmark_iterations);
+  gpr_log(GPR_INFO, "client channel memory usage %zi bytes",
+          client_channel_end.total_size_relative -
+              client_channel_start.total_size_relative);
+
+  gpr_log(GPR_INFO, "---------server stats--------");
+  gpr_log(GPR_INFO, "server create: %zi bytes",
+          after_server_create.total_size_relative -
+              before_server_create.total_size_relative);
+  gpr_log(GPR_INFO, "server call memory usage: %f bytes per call",
+          (double)(server_calls_inflight.total_size_relative -
+                   server_benchmark_calls_start.total_size_relative) /
+              benchmark_iterations);
+  gpr_log(GPR_INFO, "server channel memory usage %zi bytes",
+          server_calls_end.total_size_relative -
+              after_server_create.total_size_relative);
+
+  grpc_memory_counters_destroy();
+  return 0;
+}
diff --git a/test/core/memory_usage/memory_usage_test.c b/test/core/memory_usage/memory_usage_test.c
new file mode 100644
index 0000000000..7e7a9d050d
--- /dev/null
+++ b/test/core/memory_usage/memory_usage_test.c
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/subprocess.h>
+#include "src/core/lib/support/string.h"
+#include "test/core/util/port.h"
+
+int main(int argc, char **argv) {
+  char *me = argv[0];
+  char *lslash = strrchr(me, '/');
+  char root[1024];
+  int port = grpc_pick_unused_port_or_die();
+  char *args[10];
+  int status;
+  gpr_subprocess *svr, *cli;
+  /* figure out where we are */
+  if (lslash) {
+    memcpy(root, me, (size_t)(lslash - me));
+    root[lslash - me] = 0;
+  } else {
+    strcpy(root, ".");
+  }
+  /* start the server */
+  gpr_asprintf(&args[0], "%s/memory_profile_server%s", root,
+               gpr_subprocess_binary_extension());
+  args[1] = "--bind";
+  gpr_join_host_port(&args[2], "::", port);
+  args[3] = "--no-secure";
+  svr = gpr_subprocess_create(4, (const char **)args);
+  gpr_free(args[0]);
+  gpr_free(args[2]);
+
+  /* start the client */
+  gpr_asprintf(&args[0], "%s/memory_profile_client%s", root,
+               gpr_subprocess_binary_extension());
+  args[1] = "--target";
+  gpr_join_host_port(&args[2], "127.0.0.1", port);
+  args[3] = "--warmup=1000";
+  args[4] = "--benchmark=9000";
+  cli = gpr_subprocess_create(5, (const char **)args);
+  gpr_free(args[0]);
+  gpr_free(args[2]);
+
+  /* wait for completion */
+  printf("waiting for client\n");
+  if ((status = gpr_subprocess_join(cli))) {
+    gpr_subprocess_destroy(cli);
+    gpr_subprocess_destroy(svr);
+    return status;
+  }
+  gpr_subprocess_destroy(cli);
+
+  gpr_subprocess_interrupt(svr);
+  status = gpr_subprocess_join(svr);
+  gpr_subprocess_destroy(svr);
+  return status;
+}
diff --git a/test/core/memory_usage/server.c b/test/core/memory_usage/server.c
new file mode 100644
index 0000000000..ab059c25b8
--- /dev/null
+++ b/test/core/memory_usage/server.c
@@ -0,0 +1,325 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#ifndef _WIN32
+/* This is for _exit() below, which is temporary. */
+#include <unistd.h>
+#endif
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include "test/core/end2end/data/ssl_test_data.h"
+#include "test/core/util/memory_counters.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+static grpc_completion_queue *cq;
+static grpc_server *server;
+static grpc_op metadata_ops[2];
+static grpc_op snapshot_ops[5];
+static grpc_op status_op;
+static int got_sigint = 0;
+static grpc_byte_buffer *payload_buffer = NULL;
+static grpc_byte_buffer *terminal_buffer = NULL;
+static int was_cancelled = 2;
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+typedef enum {
+  FLING_SERVER_NEW_REQUEST = 1,
+  FLING_SERVER_SEND_INIT_METADATA,
+  FLING_SERVER_WAIT_FOR_DESTROY,
+  FLING_SERVER_SEND_STATUS_FLING_CALL,
+  FLING_SERVER_SEND_STATUS_SNAPSHOT,
+  FLING_SERVER_BATCH_SEND_STATUS_FLING_CALL
+} fling_server_tags;
+
+typedef struct {
+  fling_server_tags state;
+  grpc_call *call;
+  grpc_call_details call_details;
+  grpc_metadata_array request_metadata_recv;
+  grpc_metadata_array initial_metadata_send;
+} fling_call;
+
+// hold up to 10000 calls and 6 snaphost calls
+static fling_call calls[100006];
+
+static void request_call_unary(int call_idx) {
+  if (call_idx == (int)(sizeof(calls) / sizeof(fling_call))) {
+    gpr_log(GPR_INFO, "Used all call slots (10000) on server. Server exit.");
+    _exit(0);
+  }
+  grpc_metadata_array_init(&calls[call_idx].request_metadata_recv);
+  grpc_server_request_call(
+      server, &calls[call_idx].call, &calls[call_idx].call_details,
+      &calls[call_idx].request_metadata_recv, cq, cq, &calls[call_idx]);
+}
+
+static void send_initial_metadata_unary(void *tag) {
+  grpc_metadata_array_init(&(*(fling_call *)tag).initial_metadata_send);
+  metadata_ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
+  metadata_ops[0].data.send_initial_metadata.count = 0;
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch((*(fling_call *)tag).call,
+                                                   metadata_ops, 1, tag, NULL));
+}
+
+static void send_status(void *tag) {
+  status_op.op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  status_op.data.send_status_from_server.status = GRPC_STATUS_OK;
+  status_op.data.send_status_from_server.trailing_metadata_count = 0;
+  grpc_slice details = grpc_slice_from_static_string("");
+  status_op.data.send_status_from_server.status_details = &details;
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch((*(fling_call *)tag).call,
+                                                   &status_op, 1, tag, NULL));
+}
+
+static void send_snapshot(void *tag, struct grpc_memory_counters *snapshot) {
+  grpc_op *op;
+
+  grpc_slice snapshot_slice =
+      grpc_slice_new(snapshot, sizeof(*snapshot), gpr_free);
+  payload_buffer = grpc_raw_byte_buffer_create(&snapshot_slice, 1);
+  grpc_metadata_array_init(&(*(fling_call *)tag).initial_metadata_send);
+
+  op = snapshot_ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message.recv_message = &terminal_buffer;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  if (payload_buffer == NULL) {
+    gpr_log(GPR_INFO, "NULL payload buffer !!!");
+  }
+  op->data.send_message.send_message = payload_buffer;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  grpc_slice details = grpc_slice_from_static_string("");
+  op->data.send_status_from_server.status_details = &details;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op++;
+
+  GPR_ASSERT(GRPC_CALL_OK ==
+             grpc_call_start_batch((*(fling_call *)tag).call, snapshot_ops,
+                                   (size_t)(op - snapshot_ops), tag, NULL));
+}
+/* We have some sort of deadlock, so let's not exit gracefully for now.
+   When that is resolved, please remove the #include <unistd.h> above. */
+static void sigint_handler(int x) { _exit(0); }
+
+int main(int argc, char **argv) {
+  grpc_memory_counters_init();
+  grpc_event ev;
+  char *addr_buf = NULL;
+  gpr_cmdline *cl;
+  int shutdown_started = 0;
+  int shutdown_finished = 0;
+
+  int secure = 0;
+  char *addr = NULL;
+
+  char *fake_argv[1];
+
+  GPR_ASSERT(argc >= 1);
+  fake_argv[0] = argv[0];
+  grpc_test_init(1, fake_argv);
+
+  grpc_init();
+  srand((unsigned)clock());
+
+  cl = gpr_cmdline_create("fling server");
+  gpr_cmdline_add_string(cl, "bind", "Bind host:port", &addr);
+  gpr_cmdline_add_flag(cl, "secure", "Run with security?", &secure);
+  gpr_cmdline_parse(cl, argc, argv);
+  gpr_cmdline_destroy(cl);
+
+  if (addr == NULL) {
+    gpr_join_host_port(&addr_buf, "::", grpc_pick_unused_port_or_die());
+    addr = addr_buf;
+  }
+  gpr_log(GPR_INFO, "creating server on: %s", addr);
+
+  cq = grpc_completion_queue_create(NULL);
+
+  struct grpc_memory_counters before_server_create =
+      grpc_memory_counters_snapshot();
+  if (secure) {
+    grpc_ssl_pem_key_cert_pair pem_key_cert_pair = {test_server1_key,
+                                                    test_server1_cert};
+    grpc_server_credentials *ssl_creds = grpc_ssl_server_credentials_create(
+        NULL, &pem_key_cert_pair, 1, 0, NULL);
+    server = grpc_server_create(NULL, NULL);
+    GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr, ssl_creds));
+    grpc_server_credentials_release(ssl_creds);
+  } else {
+    server = grpc_server_create(NULL, NULL);
+    GPR_ASSERT(grpc_server_add_insecure_http2_port(server, addr));
+  }
+
+  grpc_server_register_completion_queue(server, cq, NULL);
+  grpc_server_start(server);
+
+  struct grpc_memory_counters after_server_create =
+      grpc_memory_counters_snapshot();
+
+  gpr_free(addr_buf);
+  addr = addr_buf = NULL;
+
+  // initialize call instances
+  for (int i = 0; i < (int)(sizeof(calls) / sizeof(fling_call)); i++) {
+    grpc_call_details_init(&calls[i].call_details);
+    calls[i].state = FLING_SERVER_NEW_REQUEST;
+  }
+
+  int next_call_idx = 0;
+  struct grpc_memory_counters current_snapshot;
+
+  request_call_unary(next_call_idx);
+
+  signal(SIGINT, sigint_handler);
+
+  while (!shutdown_finished) {
+    if (got_sigint && !shutdown_started) {
+      gpr_log(GPR_INFO, "Shutting down due to SIGINT");
+      grpc_server_shutdown_and_notify(server, cq, tag(1000));
+      GPR_ASSERT(grpc_completion_queue_pluck(
+                     cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
+                     .type == GRPC_OP_COMPLETE);
+      grpc_completion_queue_shutdown(cq);
+      shutdown_started = 1;
+    }
+    ev = grpc_completion_queue_next(
+        cq, gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                         gpr_time_from_micros(1000000, GPR_TIMESPAN)),
+        NULL);
+    fling_call *s = ev.tag;
+    switch (ev.type) {
+      case GRPC_OP_COMPLETE:
+        switch (s->state) {
+          case FLING_SERVER_NEW_REQUEST:
+            request_call_unary(++next_call_idx);
+            if (0 == grpc_slice_str_cmp(s->call_details.method,
+                                        "/Reflector/reflectUnary")) {
+              s->state = FLING_SERVER_SEND_INIT_METADATA;
+              send_initial_metadata_unary(s);
+            } else if (0 ==
+                       grpc_slice_str_cmp(s->call_details.method,
+                                          "Reflector/GetBeforeSvrCreation")) {
+              s->state = FLING_SERVER_SEND_STATUS_SNAPSHOT;
+              send_snapshot(s, &before_server_create);
+            } else if (0 ==
+                       grpc_slice_str_cmp(s->call_details.method,
+                                          "Reflector/GetAfterSvrCreation")) {
+              s->state = FLING_SERVER_SEND_STATUS_SNAPSHOT;
+              send_snapshot(s, &after_server_create);
+            } else if (0 == grpc_slice_str_cmp(s->call_details.method,
+                                               "Reflector/SimpleSnapshot")) {
+              s->state = FLING_SERVER_SEND_STATUS_SNAPSHOT;
+              current_snapshot = grpc_memory_counters_snapshot();
+              send_snapshot(s, &current_snapshot);
+            } else if (0 == grpc_slice_str_cmp(s->call_details.method,
+                                               "Reflector/DestroyCalls")) {
+              s->state = FLING_SERVER_BATCH_SEND_STATUS_FLING_CALL;
+              current_snapshot = grpc_memory_counters_snapshot();
+              send_snapshot(s, &current_snapshot);
+            } else {
+              gpr_log(GPR_ERROR, "Wrong call method");
+            }
+            break;
+          case FLING_SERVER_SEND_INIT_METADATA:
+            s->state = FLING_SERVER_WAIT_FOR_DESTROY;
+            break;
+          case FLING_SERVER_WAIT_FOR_DESTROY:
+            break;
+          case FLING_SERVER_SEND_STATUS_FLING_CALL:
+            grpc_call_destroy(s->call);
+            grpc_call_details_destroy(&s->call_details);
+            grpc_metadata_array_destroy(&s->initial_metadata_send);
+            grpc_metadata_array_destroy(&s->request_metadata_recv);
+            break;
+          case FLING_SERVER_BATCH_SEND_STATUS_FLING_CALL:
+            for (int k = 0; k < (int)(sizeof(calls) / sizeof(fling_call));
+                 ++k) {
+              if (calls[k].state == FLING_SERVER_WAIT_FOR_DESTROY) {
+                calls[k].state = FLING_SERVER_SEND_STATUS_FLING_CALL;
+                send_status(&calls[k]);
+              }
+            }
+          // no break here since we want to continue to case
+          // FLING_SERVER_SEND_STATUS_SNAPSHOT to destroy the snapshot call
+          case FLING_SERVER_SEND_STATUS_SNAPSHOT:
+            grpc_byte_buffer_destroy(payload_buffer);
+            grpc_byte_buffer_destroy(terminal_buffer);
+            grpc_call_destroy(s->call);
+            grpc_call_details_destroy(&s->call_details);
+            grpc_metadata_array_destroy(&s->initial_metadata_send);
+            grpc_metadata_array_destroy(&s->request_metadata_recv);
+            terminal_buffer = NULL;
+            payload_buffer = NULL;
+            break;
+        }
+        break;
+      case GRPC_QUEUE_SHUTDOWN:
+        GPR_ASSERT(shutdown_started);
+        shutdown_finished = 1;
+        break;
+      case GRPC_QUEUE_TIMEOUT:
+        break;
+    }
+  }
+
+  grpc_server_destroy(server);
+  grpc_completion_queue_destroy(cq);
+  grpc_shutdown();
+  grpc_memory_counters_destroy();
+  return 0;
+}
diff --git a/test/core/nanopb/BUILD b/test/core/nanopb/BUILD
new file mode 100644
index 0000000000..b02d750f32
--- /dev/null
+++ b/test/core/nanopb/BUILD
@@ -0,0 +1,49 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
+
+grpc_fuzzer(
+  name = "fuzzer_response",
+  srcs = ["fuzzer_response.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "corpus_response",
+  copts = ["-std=c99"],
+)
+
+grpc_fuzzer(
+  name = "fuzzer_serverlist",
+  srcs = ["fuzzer_serverlist.c"],
+  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "corpus_serverlist",
+  copts = ["-std=c99"],
+)
+
diff --git a/test/core/security/b64_test.c b/test/core/security/b64_test.c
index af883f51e9..28af48075e 100644
--- a/test/core/security/b64_test.c
+++ b/test/core/security/b64_test.c
@@ -38,6 +38,8 @@
 #include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
 static int buffers_are_equal(const unsigned char *buf1,
@@ -57,12 +59,14 @@ static void test_simple_encode_decode_b64(int url_safe, int multiline) {
   const char *hello = "hello";
   char *hello_b64 =
       grpc_base64_encode(hello, strlen(hello), url_safe, multiline);
-  grpc_slice hello_slice = grpc_base64_decode(hello_b64, url_safe);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_slice hello_slice = grpc_base64_decode(&exec_ctx, hello_b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_LENGTH(hello_slice) == strlen(hello));
   GPR_ASSERT(strncmp((const char *)GRPC_SLICE_START_PTR(hello_slice), hello,
                      GRPC_SLICE_LENGTH(hello_slice)) == 0);
 
-  grpc_slice_unref(hello_slice);
+  grpc_slice_unref_internal(&exec_ctx, hello_slice);
+  grpc_exec_ctx_finish(&exec_ctx);
   gpr_free(hello_b64);
 }
 
@@ -75,13 +79,15 @@ static void test_full_range_encode_decode_b64(int url_safe, int multiline) {
 
   /* Try all the different paddings. */
   for (i = 0; i < 3; i++) {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     b64 = grpc_base64_encode(orig, sizeof(orig) - i, url_safe, multiline);
-    orig_decoded = grpc_base64_decode(b64, url_safe);
+    orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
     GPR_ASSERT(GRPC_SLICE_LENGTH(orig_decoded) == (sizeof(orig) - i));
     GPR_ASSERT(buffers_are_equal(orig, GRPC_SLICE_START_PTR(orig_decoded),
                                  sizeof(orig) - i));
-    grpc_slice_unref(orig_decoded);
+    grpc_slice_unref_internal(&exec_ctx, orig_decoded);
     gpr_free(b64);
+    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -117,7 +123,7 @@ static void test_full_range_encode_decode_b64_urlsafe_multiline(void) {
   test_full_range_encode_decode_b64(1, 1);
 }
 
-static void test_url_safe_unsafe_mismtach_failure(void) {
+static void test_url_safe_unsafe_mismatch_failure(void) {
   unsigned char orig[256];
   size_t i;
   char *b64;
@@ -125,17 +131,19 @@ static void test_url_safe_unsafe_mismtach_failure(void) {
   int url_safe = 1;
   for (i = 0; i < sizeof(orig); i++) orig[i] = (uint8_t)i;
 
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   b64 = grpc_base64_encode(orig, sizeof(orig), url_safe, 0);
-  orig_decoded = grpc_base64_decode(b64, !url_safe);
+  orig_decoded = grpc_base64_decode(&exec_ctx, b64, !url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref(orig_decoded);
+  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
 
   b64 = grpc_base64_encode(orig, sizeof(orig), !url_safe, 0);
-  orig_decoded = grpc_base64_decode(b64, url_safe);
+  orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref(orig_decoded);
+  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_rfc4648_test_vectors(void) {
@@ -173,38 +181,40 @@ static void test_rfc4648_test_vectors(void) {
 static void test_unpadded_decode(void) {
   grpc_slice decoded;
 
-  decoded = grpc_base64_decode("Zm9vYmFy", 0);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmFy", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foobar") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("Zm9vYmE", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmE", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fooba") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("Zm9vYg", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foob") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("Zm9v", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "Zm9v", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("Zm8", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "Zm8", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("Zg", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "Zg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "f") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode("", 0);
+  decoded = grpc_base64_decode(&exec_ctx, "", 0);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(decoded));
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
@@ -217,7 +227,7 @@ int main(int argc, char **argv) {
   test_full_range_encode_decode_b64_multiline();
   test_full_range_encode_decode_b64_urlsafe_no_multiline();
   test_full_range_encode_decode_b64_urlsafe_multiline();
-  test_url_safe_unsafe_mismtach_failure();
+  test_url_safe_unsafe_mismatch_failure();
   test_rfc4648_test_vectors();
   test_unpadded_decode();
   return 0;
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index d4c755088d..c0933c64a6 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -166,24 +166,29 @@ static grpc_httpcli_response http_response(int status, const char *body) {
 /* -- Tests. -- */
 
 static void test_empty_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(0);
   GPR_ASSERT(store->num_entries == 0);
   GPR_ASSERT(store->allocated == 0);
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_ref_unref_empty_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(0);
   grpc_credentials_md_store_ref(store);
   grpc_credentials_md_store_ref(store);
   GPR_ASSERT(store->num_entries == 0);
   GPR_ASSERT(store->allocated == 0);
-  grpc_credentials_md_store_unref(store);
-  grpc_credentials_md_store_unref(store);
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_add_to_empty_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(0);
   const char *key_str = "hello";
   const char *value_str = "there blah blah blah blah blah blah blah";
@@ -191,14 +196,16 @@ static void test_add_to_empty_md_store(void) {
   grpc_slice value = grpc_slice_from_copied_string(value_str);
   grpc_credentials_md_store_add(store, key, value);
   GPR_ASSERT(store->num_entries == 1);
-  GPR_ASSERT(grpc_slice_cmp(key, store->entries[0].key) == 0);
-  GPR_ASSERT(grpc_slice_cmp(value, store->entries[0].value) == 0);
+  GPR_ASSERT(grpc_slice_eq(key, store->entries[0].key));
+  GPR_ASSERT(grpc_slice_eq(value, store->entries[0].value));
   grpc_slice_unref(key);
   grpc_slice_unref(value);
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_add_cstrings_to_empty_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(0);
   const char *key_str = "hello";
   const char *value_str = "there blah blah blah blah blah blah blah";
@@ -206,18 +213,22 @@ static void test_add_cstrings_to_empty_md_store(void) {
   GPR_ASSERT(store->num_entries == 1);
   GPR_ASSERT(grpc_slice_str_cmp(store->entries[0].key, key_str) == 0);
   GPR_ASSERT(grpc_slice_str_cmp(store->entries[0].value, value_str) == 0);
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_empty_preallocated_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(4);
   GPR_ASSERT(store->num_entries == 0);
   GPR_ASSERT(store->allocated == 4);
   GPR_ASSERT(store->entries != NULL);
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_add_abunch_to_md_store(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *store = grpc_credentials_md_store_create(4);
   size_t num_entries = 1000;
   const char *key_str = "hello";
@@ -230,16 +241,19 @@ static void test_add_abunch_to_md_store(void) {
     GPR_ASSERT(grpc_slice_str_cmp(store->entries[i].key, key_str) == 0);
     GPR_ASSERT(grpc_slice_str_cmp(store->entries[i].value, value_str) == 0);
   }
-  grpc_credentials_md_store_unref(store);
+  grpc_credentials_md_store_unref(&exec_ctx, store);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_ok(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response =
       http_response(200, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) == GRPC_CREDENTIALS_OK);
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+             GRPC_CREDENTIALS_OK);
   GPR_ASSERT(token_lifetime.tv_sec == 3599);
   GPR_ASSERT(token_lifetime.tv_nsec == 0);
   GPR_ASSERT(token_md->num_entries == 1);
@@ -248,32 +262,38 @@ static void test_oauth2_token_fetcher_creds_parsing_ok(void) {
   GPR_ASSERT(grpc_slice_str_cmp(token_md->entries[0].value,
                                 "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_") ==
              0);
-  grpc_credentials_md_store_unref(token_md);
+  grpc_credentials_md_store_unref(&exec_ctx, token_md);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_bad_http_status(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response =
       http_response(401, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_empty_http_body(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response = http_response(200, "");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_invalid_json(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response =
@@ -282,12 +302,14 @@ static void test_oauth2_token_fetcher_creds_parsing_invalid_json(void) {
                     " \"expires_in\":3599, "
                     " \"token_type\":\"Bearer\"");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response = http_response(200,
@@ -295,12 +317,14 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token(void) {
                                                  " \"expires_in\":3599, "
                                                  " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_type(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response =
@@ -309,13 +333,15 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token_type(void) {
                     " \"expires_in\":3599, "
                     "}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime(
     void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_credentials_md_store *token_md = NULL;
   gpr_timespec token_lifetime;
   grpc_httpcli_response response =
@@ -323,9 +349,10 @@ static void test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime(
                     "{\"access_token\":\"ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_\","
                     " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &response, &token_md, &token_lifetime) ==
+                 &exec_ctx, &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void check_metadata(expected_md *expected, grpc_credentials_md *md_elems,
@@ -361,7 +388,7 @@ static void check_google_iam_metadata(grpc_exec_ctx *exec_ctx, void *user_data,
   GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 2);
   check_metadata(emd, md_elems, num_md);
-  grpc_call_credentials_unref(c);
+  grpc_call_credentials_unref(exec_ctx, c);
 }
 
 static void test_google_iam_creds(void) {
@@ -385,7 +412,7 @@ static void check_access_token_metadata(
   GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 1);
   check_metadata(emd, md_elems, num_md);
-  grpc_call_credentials_unref(c);
+  grpc_call_credentials_unref(exec_ctx, c);
 }
 
 static void test_access_token_creds(void) {
@@ -401,9 +428,10 @@ static void test_access_token_creds(void) {
 }
 
 static grpc_security_status check_channel_oauth2_create_security_connector(
-    grpc_channel_credentials *c, grpc_call_credentials *call_creds,
-    const char *target, const grpc_channel_args *args,
-    grpc_channel_security_connector **sc, grpc_channel_args **new_args) {
+    grpc_exec_ctx *exec_ctx, grpc_channel_credentials *c,
+    grpc_call_credentials *call_creds, const char *target,
+    const grpc_channel_args *args, grpc_channel_security_connector **sc,
+    grpc_channel_args **new_args) {
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != NULL);
   GPR_ASSERT(strcmp(call_creds->type, GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
@@ -411,6 +439,7 @@ static grpc_security_status check_channel_oauth2_create_security_connector(
 }
 
 static void test_channel_oauth2_composite_creds(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_channel_args *new_args;
   grpc_channel_credentials_vtable vtable = {
       NULL, check_channel_oauth2_create_security_connector, NULL};
@@ -424,9 +453,10 @@ static void test_channel_oauth2_composite_creds(void) {
   grpc_channel_credentials_release(channel_creds);
   grpc_call_credentials_release(oauth2_creds);
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 channel_oauth2_creds, NULL, NULL, NULL, &new_args) ==
-             GRPC_SECURITY_OK);
+                 &exec_ctx, channel_oauth2_creds, NULL, NULL, NULL,
+                 &new_args) == GRPC_SECURITY_OK);
   grpc_channel_credentials_release(channel_oauth2_creds);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void check_oauth2_google_iam_composite_metadata(
@@ -443,7 +473,7 @@ static void check_oauth2_google_iam_composite_metadata(
   GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 3);
   check_metadata(emd, md_elems, num_md);
-  grpc_call_credentials_unref(c);
+  grpc_call_credentials_unref(exec_ctx, c);
 }
 
 static void test_oauth2_google_iam_composite_creds(void) {
@@ -459,8 +489,8 @@ static void test_oauth2_google_iam_composite_creds(void) {
   grpc_call_credentials *composite_creds =
       grpc_composite_call_credentials_create(oauth2_creds, google_iam_creds,
                                              NULL);
-  grpc_call_credentials_unref(oauth2_creds);
-  grpc_call_credentials_unref(google_iam_creds);
+  grpc_call_credentials_unref(&exec_ctx, oauth2_creds);
+  grpc_call_credentials_unref(&exec_ctx, google_iam_creds);
   GPR_ASSERT(
       strcmp(composite_creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0);
   creds_array =
@@ -478,9 +508,10 @@ static void test_oauth2_google_iam_composite_creds(void) {
 
 static grpc_security_status
 check_channel_oauth2_google_iam_create_security_connector(
-    grpc_channel_credentials *c, grpc_call_credentials *call_creds,
-    const char *target, const grpc_channel_args *args,
-    grpc_channel_security_connector **sc, grpc_channel_args **new_args) {
+    grpc_exec_ctx *exec_ctx, grpc_channel_credentials *c,
+    grpc_call_credentials *call_creds, const char *target,
+    const grpc_channel_args *args, grpc_channel_security_connector **sc,
+    grpc_channel_args **new_args) {
   const grpc_call_credentials_array *creds_array;
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != NULL);
@@ -495,6 +526,7 @@ check_channel_oauth2_google_iam_create_security_connector(
 }
 
 static void test_channel_oauth2_google_iam_composite_creds(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_channel_args *new_args;
   grpc_channel_credentials_vtable vtable = {
       NULL, check_channel_oauth2_google_iam_create_security_connector, NULL};
@@ -517,10 +549,11 @@ static void test_channel_oauth2_google_iam_composite_creds(void) {
   grpc_call_credentials_release(google_iam_creds);
 
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 channel_oauth2_iam_creds, NULL, NULL, NULL, &new_args) ==
-             GRPC_SECURITY_OK);
+                 &exec_ctx, channel_oauth2_iam_creds, NULL, NULL, NULL,
+                 &new_args) == GRPC_SECURITY_OK);
 
   grpc_channel_credentials_release(channel_oauth2_iam_creds);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void on_oauth2_creds_get_metadata_success(
@@ -565,7 +598,7 @@ static int compute_engine_httpcli_get_success_override(
     grpc_httpcli_response *response) {
   validate_compute_engine_http_request(request);
   *response = http_response(200, valid_oauth2_json_response);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -575,7 +608,7 @@ static int compute_engine_httpcli_get_failure_override(
     grpc_httpcli_response *response) {
   validate_compute_engine_http_request(request);
   *response = http_response(403, "Not Authorized.");
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -619,7 +652,7 @@ static void test_compute_engine_creds_success(void) {
       on_oauth2_creds_get_metadata_success, (void *)test_user_data);
   grpc_exec_ctx_finish(&exec_ctx);
 
-  grpc_call_credentials_unref(compute_engine_creds);
+  grpc_call_credentials_unref(&exec_ctx, compute_engine_creds);
   grpc_httpcli_set_override(NULL, NULL);
 }
 
@@ -634,7 +667,7 @@ static void test_compute_engine_creds_failure(void) {
   grpc_call_credentials_get_request_metadata(
       &exec_ctx, compute_engine_creds, NULL, auth_md_ctx,
       on_oauth2_creds_get_metadata_failure, (void *)test_user_data);
-  grpc_call_credentials_unref(compute_engine_creds);
+  grpc_call_credentials_unref(&exec_ctx, compute_engine_creds);
   grpc_httpcli_set_override(NULL, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -668,7 +701,7 @@ static int refresh_token_httpcli_post_success(
     grpc_closure *on_done, grpc_httpcli_response *response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(200, valid_oauth2_json_response);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -678,7 +711,7 @@ static int refresh_token_httpcli_post_failure(
     grpc_closure *on_done, grpc_httpcli_response *response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(403, "Not Authorized.");
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -706,7 +739,7 @@ static void test_refresh_token_creds_success(void) {
       on_oauth2_creds_get_metadata_success, (void *)test_user_data);
   grpc_exec_ctx_flush(&exec_ctx);
 
-  grpc_call_credentials_unref(refresh_token_creds);
+  grpc_call_credentials_unref(&exec_ctx, refresh_token_creds);
   grpc_httpcli_set_override(NULL, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -723,7 +756,7 @@ static void test_refresh_token_creds_failure(void) {
   grpc_call_credentials_get_request_metadata(
       &exec_ctx, refresh_token_creds, NULL, auth_md_ctx,
       on_oauth2_creds_get_metadata_failure, (void *)test_user_data);
-  grpc_call_credentials_unref(refresh_token_creds);
+  grpc_call_credentials_unref(&exec_ctx, refresh_token_creds);
   grpc_httpcli_set_override(NULL, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -832,7 +865,7 @@ static void test_jwt_creds_success(void) {
   grpc_exec_ctx_flush(&exec_ctx);
 
   gpr_free(json_key_string);
-  grpc_call_credentials_unref(jwt_creds);
+  grpc_call_credentials_unref(&exec_ctx, jwt_creds);
   grpc_jwt_encode_and_sign_set_override(NULL);
 }
 
@@ -851,7 +884,7 @@ static void test_jwt_creds_signing_failure(void) {
       on_jwt_creds_get_metadata_failure, (void *)test_user_data);
 
   gpr_free(json_key_string);
-  grpc_call_credentials_unref(jwt_creds);
+  grpc_call_credentials_unref(&exec_ctx, jwt_creds);
   grpc_jwt_encode_and_sign_set_override(NULL);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -870,6 +903,7 @@ static void set_google_default_creds_env_var_with_file_contents(
 }
 
 static void test_google_default_creds_auth_key(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_service_account_jwt_access_credentials *jwt;
   grpc_composite_channel_credentials *creds;
   char *json_key = test_json_key_str();
@@ -885,11 +919,13 @@ static void test_google_default_creds_auth_key(void) {
       strcmp(jwt->key.client_id,
              "777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent.com") ==
       0);
-  grpc_channel_credentials_unref(&creds->base);
+  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_google_default_creds_refresh_token(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_google_refresh_token_credentials *refresh;
   grpc_composite_channel_credentials *creds;
   grpc_flush_cached_google_default_credentials();
@@ -901,8 +937,9 @@ static void test_google_default_creds_refresh_token(void) {
   refresh = (grpc_google_refresh_token_credentials *)creds->call_creds;
   GPR_ASSERT(strcmp(refresh->refresh_token.client_id,
                     "32555999999.apps.googleusercontent.com") == 0);
-  grpc_channel_credentials_unref(&creds->base);
+  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int default_creds_gce_detection_httpcli_get_success_override(
@@ -917,7 +954,7 @@ static int default_creds_gce_detection_httpcli_get_success_override(
   response->hdrs = headers;
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -975,7 +1012,7 @@ static int default_creds_gce_detection_httpcli_get_failure_override(
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
   *response = http_response(200, "");
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -1028,9 +1065,8 @@ static void plugin_get_metadata_success(void *state,
   *s = PLUGIN_GET_METADATA_CALLED_STATE;
   for (i = 0; i < GPR_ARRAY_SIZE(plugin_md); i++) {
     memset(&md[i], 0, sizeof(grpc_metadata));
-    md[i].key = plugin_md[i].key;
-    md[i].value = plugin_md[i].value;
-    md[i].value_length = strlen(plugin_md[i].value);
+    md[i].key = grpc_slice_from_copied_string(plugin_md[i].key);
+    md[i].value = grpc_slice_from_copied_string(plugin_md[i].value);
   }
   cb(user_data, md, GPR_ARRAY_SIZE(md), GRPC_STATUS_OK, NULL);
 }
@@ -1142,6 +1178,8 @@ static void test_get_well_known_google_credentials_file_path(void) {
 }
 
 static void test_channel_creds_duplicate_without_call_creds(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
   grpc_channel_credentials *channel_creds =
       grpc_fake_transport_security_credentials_create();
 
@@ -1149,21 +1187,23 @@ static void test_channel_creds_duplicate_without_call_creds(void) {
       grpc_channel_credentials_duplicate_without_call_credentials(
           channel_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(dup);
+  grpc_channel_credentials_unref(&exec_ctx, dup);
 
   grpc_call_credentials *call_creds =
       grpc_access_token_credentials_create("blah", NULL);
   grpc_channel_credentials *composite_creds =
       grpc_composite_channel_credentials_create(channel_creds, call_creds,
                                                 NULL);
-  grpc_call_credentials_unref(call_creds);
+  grpc_call_credentials_unref(&exec_ctx, call_creds);
   dup = grpc_channel_credentials_duplicate_without_call_credentials(
       composite_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(dup);
+  grpc_channel_credentials_unref(&exec_ctx, dup);
 
-  grpc_channel_credentials_unref(channel_creds);
-  grpc_channel_credentials_unref(composite_creds);
+  grpc_channel_credentials_unref(&exec_ctx, channel_creds);
+  grpc_channel_credentials_unref(&exec_ctx, composite_creds);
+
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/security/json_token_test.c b/test/core/security/json_token_test.c
index 201655881f..5cebb09bb2 100644
--- a/test/core/security/json_token_test.c
+++ b/test/core/security/json_token_test.c
@@ -44,6 +44,7 @@
 #include "src/core/lib/json/json.h"
 #include "src/core/lib/security/credentials/oauth2/oauth2_credentials.h"
 #include "src/core/lib/security/util/b64.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
 /* This JSON key was generated with the GCE console and revoked immediately.
@@ -220,6 +221,7 @@ static void test_parse_json_key_failure_no_private_key(void) {
 
 static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
                                            char **scratchpad) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   char *b64;
   char *decoded;
   grpc_json *json;
@@ -227,7 +229,7 @@ static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
   b64 = gpr_malloc(len + 1);
   strncpy(b64, str, len);
   b64[len] = '\0';
-  slice = grpc_base64_decode(b64, 1);
+  slice = grpc_base64_decode(&exec_ctx, b64, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(slice));
   decoded = gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1);
   strncpy(decoded, (const char *)GRPC_SLICE_START_PTR(slice),
@@ -237,6 +239,7 @@ static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
   gpr_free(b64);
   *scratchpad = decoded;
   grpc_slice_unref(slice);
+  grpc_exec_ctx_finish(&exec_ctx);
   return json;
 }
 
@@ -338,10 +341,12 @@ static void check_jwt_claim(grpc_json *claim, const char *expected_audience,
 static void check_jwt_signature(const char *b64_signature, RSA *rsa_key,
                                 const char *signed_data,
                                 size_t signed_data_size) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
   EVP_MD_CTX *md_ctx = EVP_MD_CTX_create();
   EVP_PKEY *key = EVP_PKEY_new();
 
-  grpc_slice sig = grpc_base64_decode(b64_signature, 1);
+  grpc_slice sig = grpc_base64_decode(&exec_ctx, b64_signature, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   GPR_ASSERT(GRPC_SLICE_LENGTH(sig) == 128);
 
@@ -355,9 +360,11 @@ static void check_jwt_signature(const char *b64_signature, RSA *rsa_key,
   GPR_ASSERT(EVP_DigestVerifyFinal(md_ctx, GRPC_SLICE_START_PTR(sig),
                                    GRPC_SLICE_LENGTH(sig)) == 1);
 
-  grpc_slice_unref(sig);
+  grpc_slice_unref_internal(&exec_ctx, sig);
   if (key != NULL) EVP_PKEY_free(key);
   if (md_ctx != NULL) EVP_MD_CTX_destroy(md_ctx);
+
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static char *service_account_creds_jwt_encode_and_sign(
diff --git a/test/core/security/jwt_verifier_test.c b/test/core/security/jwt_verifier_test.c
index 9a21814adc..a9bd976a39 100644
--- a/test/core/security/jwt_verifier_test.c
+++ b/test/core/security/jwt_verifier_test.c
@@ -224,7 +224,8 @@ static void test_claims_success(void) {
   grpc_json *json = grpc_json_parse_string_with_len(
       (char *)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != NULL);
-  claims = grpc_jwt_claims_from_json(json, s);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
   GPR_ASSERT(claims != NULL);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -233,7 +234,8 @@ static void test_claims_success(void) {
   GPR_ASSERT(strcmp(grpc_jwt_claims_id(claims), "jwtuniqueid") == 0);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_OK);
-  grpc_jwt_claims_destroy(claims);
+  grpc_jwt_claims_destroy(&exec_ctx, claims);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_expired_claims_failure(void) {
@@ -245,7 +247,8 @@ static void test_expired_claims_failure(void) {
   gpr_timespec exp_exp = {120, 0, GPR_CLOCK_REALTIME};
   gpr_timespec exp_nbf = {60, 0, GPR_CLOCK_REALTIME};
   GPR_ASSERT(json != NULL);
-  claims = grpc_jwt_claims_from_json(json, s);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
   GPR_ASSERT(claims != NULL);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -258,14 +261,17 @@ static void test_expired_claims_failure(void) {
 
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE);
-  grpc_jwt_claims_destroy(claims);
+  grpc_jwt_claims_destroy(&exec_ctx, claims);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_invalid_claims_failure(void) {
   grpc_slice s = grpc_slice_from_copied_string(invalid_claims);
   grpc_json *json = grpc_json_parse_string_with_len(
       (char *)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
-  GPR_ASSERT(grpc_jwt_claims_from_json(json, s) == NULL);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GPR_ASSERT(grpc_jwt_claims_from_json(&exec_ctx, json, s) == NULL);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_bad_audience_claims_failure(void) {
@@ -274,11 +280,13 @@ static void test_bad_audience_claims_failure(void) {
   grpc_json *json = grpc_json_parse_string_with_len(
       (char *)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != NULL);
-  claims = grpc_jwt_claims_from_json(json, s);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
   GPR_ASSERT(claims != NULL);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://bar.com") ==
              GRPC_JWT_VERIFIER_BAD_AUDIENCE);
-  grpc_jwt_claims_destroy(claims);
+  grpc_jwt_claims_destroy(&exec_ctx, claims);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_bad_subject_claims_failure(void) {
@@ -287,11 +295,13 @@ static void test_bad_subject_claims_failure(void) {
   grpc_json *json = grpc_json_parse_string_with_len(
       (char *)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != NULL);
-  claims = grpc_jwt_claims_from_json(json, s);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
   GPR_ASSERT(claims != NULL);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_BAD_SUBJECT);
-  grpc_jwt_claims_destroy(claims);
+  grpc_jwt_claims_destroy(&exec_ctx, claims);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static char *json_key_str(const char *last_part) {
@@ -346,18 +356,18 @@ static int httpcli_get_google_keys_for_email(
                     "/robot/v1/metadata/x509/"
                     "777-abaslkan11hlb6nmim3bpspl31ud@developer."
                     "gserviceaccount.com") == 0);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
-static void on_verification_success(void *user_data,
+static void on_verification_success(grpc_exec_ctx *exec_ctx, void *user_data,
                                     grpc_jwt_verifier_status status,
                                     grpc_jwt_claims *claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_OK);
   GPR_ASSERT(claims != NULL);
   GPR_ASSERT(user_data == (void *)expected_user_data);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), expected_audience) == 0);
-  grpc_jwt_claims_destroy(claims);
+  grpc_jwt_claims_destroy(exec_ctx, claims);
 }
 
 static void test_jwt_verifier_google_email_issuer_success(void) {
@@ -390,7 +400,7 @@ static int httpcli_get_custom_keys_for_email(
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "keys.bar.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/jwk/foo@bar.com") == 0);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -424,7 +434,7 @@ static int httpcli_get_jwk_set(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/oauth2/v3/certs") == 0);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -439,7 +449,7 @@ static int httpcli_get_openid_config(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(strcmp(request->http.path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
   grpc_httpcli_set_override(httpcli_get_jwk_set,
                             httpcli_post_should_not_be_called);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -465,7 +475,8 @@ static void test_jwt_verifier_url_issuer_success(void) {
   grpc_httpcli_set_override(NULL, NULL);
 }
 
-static void on_verification_key_retrieval_error(void *user_data,
+static void on_verification_key_retrieval_error(grpc_exec_ctx *exec_ctx,
+                                                void *user_data,
                                                 grpc_jwt_verifier_status status,
                                                 grpc_jwt_claims *claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR);
@@ -479,7 +490,7 @@ static int httpcli_get_bad_json(grpc_exec_ctx *exec_ctx,
                                 grpc_httpcli_response *response) {
   *response = http_response(200, gpr_strdup("{\"bad\": \"stuff\"}"));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
-  grpc_exec_ctx_sched(exec_ctx, on_done, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -535,7 +546,11 @@ static void corrupt_jwt_sig(char *jwt) {
   uint8_t *sig_bytes;
   char *last_dot = strrchr(jwt, '.');
   GPR_ASSERT(last_dot != NULL);
-  sig = grpc_base64_decode(last_dot + 1, 1);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    sig = grpc_base64_decode(&exec_ctx, last_dot + 1, 1);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   sig_bytes = GRPC_SLICE_START_PTR(sig);
   (*sig_bytes)++; /* Corrupt first byte. */
@@ -546,7 +561,8 @@ static void corrupt_jwt_sig(char *jwt) {
   grpc_slice_unref(sig);
 }
 
-static void on_verification_bad_signature(void *user_data,
+static void on_verification_bad_signature(grpc_exec_ctx *exec_ctx,
+                                          void *user_data,
                                           grpc_jwt_verifier_status status,
                                           grpc_jwt_claims *claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_SIGNATURE);
@@ -587,7 +603,7 @@ static int httpcli_get_should_not_be_called(grpc_exec_ctx *exec_ctx,
   return 1;
 }
 
-static void on_verification_bad_format(void *user_data,
+static void on_verification_bad_format(grpc_exec_ctx *exec_ctx, void *user_data,
                                        grpc_jwt_verifier_status status,
                                        grpc_jwt_claims *claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_FORMAT);
diff --git a/test/core/security/oauth2_utils.c b/test/core/security/oauth2_utils.c
index 44a209258d..ff77af908a 100644
--- a/test/core/security/oauth2_utils.c
+++ b/test/core/security/oauth2_utils.c
@@ -92,7 +92,8 @@ char *grpc_test_fetch_oauth2_token_with_credentials(
   request.pops = grpc_polling_entity_create_from_pollset(pollset);
   request.is_done = 0;
 
-  grpc_closure_init(&do_nothing_closure, do_nothing, NULL);
+  grpc_closure_init(&do_nothing_closure, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
 
   grpc_call_credentials_get_request_metadata(
       &exec_ctx, creds, &request.pops, null_ctx, on_oauth2_response, &request);
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 2b74690bc3..ea136fbdcf 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -63,7 +63,7 @@ static void on_metadata_response(grpc_exec_ctx *exec_ctx, void *user_data,
   } else {
     char *token;
     GPR_ASSERT(num_md == 1);
-    token = grpc_dump_slice(md_elems[0].value, GPR_DUMP_ASCII);
+    token = grpc_slice_to_c_string(md_elems[0].value);
     printf("\nGot token: %s\n\n", token);
     gpr_free(token);
   }
diff --git a/test/core/security/secure_endpoint_test.c b/test/core/security/secure_endpoint_test.c
index b5d95004fe..97e9c3d6db 100644
--- a/test/core/security/secure_endpoint_test.c
+++ b/test/core/security/secure_endpoint_test.c
@@ -42,6 +42,7 @@
 #include "src/core/lib/iomgr/endpoint_pair.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/security/transport/secure_endpoint.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/tsi/fake_transport_security.h"
 #include "test/core/util/test_config.h"
 
@@ -59,7 +60,7 @@ static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
   grpc_resource_quota *resource_quota =
       grpc_resource_quota_create("secure_endpoint_test");
   tcp = grpc_iomgr_create_endpoint_pair("fixture", resource_quota, slice_size);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_endpoint_add_to_pollset(&exec_ctx, tcp.client, g_pollset);
   grpc_endpoint_add_to_pollset(&exec_ctx, tcp.server, g_pollset);
 
@@ -158,20 +159,22 @@ static void test_leftover(grpc_endpoint_test_config config, size_t slice_size) {
   gpr_log(GPR_INFO, "Start test left over");
 
   grpc_slice_buffer_init(&incoming);
-  grpc_closure_init(&done_closure, inc_call_ctr, &n);
+  grpc_closure_init(&done_closure, inc_call_ctr, &n, grpc_schedule_on_exec_ctx);
   grpc_endpoint_read(&exec_ctx, f.client_ep, &incoming, &done_closure);
   grpc_exec_ctx_finish(&exec_ctx);
   GPR_ASSERT(n == 1);
   GPR_ASSERT(incoming.count == 1);
-  GPR_ASSERT(0 == grpc_slice_cmp(s, incoming.slices[0]));
+  GPR_ASSERT(grpc_slice_eq(s, incoming.slices[0]));
 
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep);
-  grpc_endpoint_shutdown(&exec_ctx, f.server_ep);
+  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+                         GRPC_ERROR_CREATE("test_leftover end"));
+  grpc_endpoint_shutdown(&exec_ctx, f.server_ep,
+                         GRPC_ERROR_CREATE("test_leftover end"));
   grpc_endpoint_destroy(&exec_ctx, f.client_ep);
   grpc_endpoint_destroy(&exec_ctx, f.server_ep);
   grpc_exec_ctx_finish(&exec_ctx);
-  grpc_slice_unref(s);
-  grpc_slice_buffer_destroy(&incoming);
+  grpc_slice_unref_internal(&exec_ctx, s);
+  grpc_slice_buffer_destroy_internal(&exec_ctx, &incoming);
 
   clean_up();
 }
@@ -191,7 +194,8 @@ int main(int argc, char **argv) {
   grpc_pollset_init(g_pollset, &g_mu);
   grpc_endpoint_tests(configs[0], g_pollset, g_mu);
   test_leftover(configs[1], 1);
-  grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
+  grpc_closure_init(&destroyed, destroy_pollset, g_pollset,
+                    grpc_schedule_on_exec_ctx);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
diff --git a/test/core/security/security_connector_test.c b/test/core/security/security_connector_test.c
index 8872cbe278..4219b134f2 100644
--- a/test/core/security/security_connector_test.c
+++ b/test/core/security/security_connector_test.c
@@ -370,7 +370,7 @@ static void test_default_ssl_roots(void) {
   gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, "");
   grpc_set_ssl_roots_override_callback(override_roots_success);
   grpc_slice roots = grpc_get_default_ssl_roots_for_testing();
-  char *roots_contents = grpc_dump_slice(roots, GPR_DUMP_ASCII);
+  char *roots_contents = grpc_slice_to_c_string(roots);
   grpc_slice_unref(roots);
   GPR_ASSERT(strcmp(roots_contents, roots_for_override_api) == 0);
   gpr_free(roots_contents);
@@ -379,7 +379,7 @@ static void test_default_ssl_roots(void) {
      instead. */
   gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, roots_env_var_file_path);
   roots = grpc_get_default_ssl_roots_for_testing();
-  roots_contents = grpc_dump_slice(roots, GPR_DUMP_ASCII);
+  roots_contents = grpc_slice_to_c_string(roots);
   grpc_slice_unref(roots);
   GPR_ASSERT(strcmp(roots_contents, roots_for_env_var) == 0);
   gpr_free(roots_contents);
@@ -388,7 +388,7 @@ static void test_default_ssl_roots(void) {
      the api. */
   gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, "");
   roots = grpc_get_default_ssl_roots_for_testing();
-  roots_contents = grpc_dump_slice(roots, GPR_DUMP_ASCII);
+  roots_contents = grpc_slice_to_c_string(roots);
   grpc_slice_unref(roots);
   GPR_ASSERT(strcmp(roots_contents, roots_for_override_api) == 0);
   gpr_free(roots_contents);
diff --git a/test/core/security/ssl_server_fuzzer.c b/test/core/security/ssl_server_fuzzer.c
index 8673225fef..f789278add 100644
--- a/test/core/security/ssl_server_fuzzer.c
+++ b/test/core/security/ssl_server_fuzzer.c
@@ -79,7 +79,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
       grpc_resource_quota_create("ssl_server_fuzzer");
   grpc_endpoint *mock_endpoint =
       grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
 
   grpc_mock_endpoint_put_read(
       &exec_ctx, mock_endpoint,
@@ -103,7 +103,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   // Create security connector
   grpc_server_security_connector *sc = NULL;
   grpc_security_status status =
-      grpc_server_credentials_create_security_connector(creds, &sc);
+      grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
   GPR_ASSERT(status == GRPC_SECURITY_OK);
   gpr_timespec deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
                                        gpr_time_from_seconds(1, GPR_TIMESPAN));
@@ -121,14 +121,15 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   // server will wait for more data. Explicitly fail the server by shutting down
   // the endpoint.
   if (!state.done_callback_called) {
-    grpc_endpoint_shutdown(&exec_ctx, mock_endpoint);
+    grpc_endpoint_shutdown(&exec_ctx, mock_endpoint,
+                           GRPC_ERROR_CREATE("Explicit close"));
     grpc_exec_ctx_flush(&exec_ctx);
   }
 
   GPR_ASSERT(state.done_callback_called);
 
   grpc_handshake_manager_destroy(&exec_ctx, handshake_mgr);
-  GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "test");
+  GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "test");
   grpc_server_credentials_release(creds);
   grpc_slice_unref(cert_slice);
   grpc_slice_unref(key_slice);
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.c
index ccc85c9f32..bbd4a67ac1 100644
--- a/test/core/security/verify_jwt.c
+++ b/test/core/security/verify_jwt.c
@@ -59,7 +59,7 @@ static void print_usage_and_exit(gpr_cmdline *cl, const char *argv0) {
   exit(1);
 }
 
-static void on_jwt_verification_done(void *user_data,
+static void on_jwt_verification_done(grpc_exec_ctx *exec_ctx, void *user_data,
                                      grpc_jwt_verifier_status status,
                                      grpc_jwt_claims *claims) {
   synchronizer *sync = user_data;
@@ -72,7 +72,7 @@ static void on_jwt_verification_done(void *user_data,
         grpc_json_dump_to_string((grpc_json *)grpc_jwt_claims_json(claims), 2);
     printf("Claims: \n\n%s\n", claims_str);
     gpr_free(claims_str);
-    grpc_jwt_claims_destroy(claims);
+    grpc_jwt_claims_destroy(exec_ctx, claims);
   } else {
     GPR_ASSERT(claims == NULL);
     fprintf(stderr, "Verification failed with error %s\n",
diff --git a/test/core/slice/percent_encode_fuzzer.c b/test/core/slice/percent_encode_fuzzer.c
index 9698e796b4..0d440c5bb2 100644
--- a/test/core/slice/percent_encode_fuzzer.c
+++ b/test/core/slice/percent_encode_fuzzer.c
@@ -55,8 +55,8 @@ static void test(const uint8_t *data, size_t size, const uint8_t *dict) {
   grpc_slice permissive_decoded_output =
       grpc_permissive_percent_decode_slice(output);
   // and decoded output must always match the input
-  GPR_ASSERT(grpc_slice_cmp(input, decoded_output) == 0);
-  GPR_ASSERT(grpc_slice_cmp(input, permissive_decoded_output) == 0);
+  GPR_ASSERT(grpc_slice_eq(input, decoded_output));
+  GPR_ASSERT(grpc_slice_eq(input, permissive_decoded_output));
   grpc_slice_unref(input);
   grpc_slice_unref(output);
   grpc_slice_unref(decoded_output);
diff --git a/test/core/slice/percent_encoding_test.c b/test/core/slice/percent_encoding_test.c
index d71c99f54c..222e695fd4 100644
--- a/test/core/slice/percent_encoding_test.c
+++ b/test/core/slice/percent_encoding_test.c
@@ -81,9 +81,9 @@ static void test_vector(const char *raw, size_t raw_length, const char *encoded,
   gpr_free(encoded2raw_msg);
   gpr_free(encoded2raw_permissive_msg);
 
-  GPR_ASSERT(0 == grpc_slice_cmp(raw_slice, encoded2raw_slice));
-  GPR_ASSERT(0 == grpc_slice_cmp(raw_slice, encoded2raw_permissive_slice));
-  GPR_ASSERT(0 == grpc_slice_cmp(encoded_slice, raw2encoded_slice));
+  GPR_ASSERT(grpc_slice_eq(raw_slice, encoded2raw_slice));
+  GPR_ASSERT(grpc_slice_eq(raw_slice, encoded2raw_permissive_slice));
+  GPR_ASSERT(grpc_slice_eq(encoded_slice, raw2encoded_slice));
 
   grpc_slice_unref(encoded2raw_slice);
   grpc_slice_unref(encoded2raw_permissive_slice);
@@ -123,8 +123,8 @@ static void test_nonconformant_vector(const char *encoded,
           encoded2raw_permissive_msg);
   gpr_free(encoded2raw_permissive_msg);
 
-  GPR_ASSERT(0 == grpc_slice_cmp(permissive_unencoded_slice,
-                                 encoded2raw_permissive_slice));
+  GPR_ASSERT(
+      grpc_slice_eq(permissive_unencoded_slice, encoded2raw_permissive_slice));
 
   grpc_slice_unref(permissive_unencoded_slice);
   grpc_slice_unref(encoded2raw_permissive_slice);
diff --git a/test/core/slice/slice_test.c b/test/core/slice/slice_test.c
index ca44becfd0..f68a953261 100644
--- a/test/core/slice/slice_test.c
+++ b/test/core/slice/slice_test.c
@@ -35,8 +35,12 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/transport/static_metadata.h"
 #include "test/core/util/test_config.h"
 
 #define LOG_TEST_NAME(x) gpr_log(GPR_INFO, "%s", x);
@@ -61,8 +65,10 @@ static void test_slice_malloc_returns_something_sensible(void) {
     GPR_ASSERT(GRPC_SLICE_LENGTH(slice) == length);
     /* If the slice has a refcount, it must be destroyable. */
     if (slice.refcount) {
-      GPR_ASSERT(slice.refcount->ref != NULL);
-      GPR_ASSERT(slice.refcount->unref != NULL);
+      GPR_ASSERT(slice.refcount->vtable != NULL);
+      GPR_ASSERT(slice.refcount->vtable->ref != NULL);
+      GPR_ASSERT(slice.refcount->vtable->unref != NULL);
+      GPR_ASSERT(slice.refcount->vtable->hash != NULL);
     }
     /* We must be able to write to every byte of the data */
     for (i = 0; i < length; i++) {
@@ -249,6 +255,55 @@ static void test_slice_from_copied_string_works(void) {
   grpc_slice_unref(slice);
 }
 
+static void test_slice_interning(void) {
+  LOG_TEST_NAME("test_slice_interning");
+
+  grpc_init();
+  grpc_slice src1 = grpc_slice_from_copied_string("hello123456789123456789");
+  grpc_slice src2 = grpc_slice_from_copied_string("hello123456789123456789");
+  GPR_ASSERT(GRPC_SLICE_START_PTR(src1) != GRPC_SLICE_START_PTR(src2));
+  grpc_slice interned1 = grpc_slice_intern(src1);
+  grpc_slice interned2 = grpc_slice_intern(src2);
+  GPR_ASSERT(GRPC_SLICE_START_PTR(interned1) ==
+             GRPC_SLICE_START_PTR(interned2));
+  GPR_ASSERT(GRPC_SLICE_START_PTR(interned1) != GRPC_SLICE_START_PTR(src1));
+  GPR_ASSERT(GRPC_SLICE_START_PTR(interned2) != GRPC_SLICE_START_PTR(src2));
+  grpc_slice_unref(src1);
+  grpc_slice_unref(src2);
+  grpc_slice_unref(interned1);
+  grpc_slice_unref(interned2);
+  grpc_shutdown();
+}
+
+static void test_static_slice_interning(void) {
+  LOG_TEST_NAME("test_static_slice_interning");
+
+  // grpc_init/grpc_shutdown deliberately omitted: they should not be necessary
+  // to intern a static slice
+
+  for (size_t i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) {
+    GPR_ASSERT(grpc_slice_is_equivalent(
+        grpc_static_slice_table[i],
+        grpc_slice_intern(grpc_static_slice_table[i])));
+  }
+}
+
+static void test_static_slice_copy_interning(void) {
+  LOG_TEST_NAME("test_static_slice_copy_interning");
+
+  grpc_init();
+
+  for (size_t i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) {
+    grpc_slice copy = grpc_slice_dup(grpc_static_slice_table[i]);
+    GPR_ASSERT(grpc_static_slice_table[i].refcount != copy.refcount);
+    GPR_ASSERT(grpc_static_slice_table[i].refcount ==
+               grpc_slice_intern(copy).refcount);
+    grpc_slice_unref(copy);
+  }
+
+  grpc_shutdown();
+}
+
 int main(int argc, char **argv) {
   unsigned length;
   grpc_test_init(argc, argv);
@@ -262,5 +317,8 @@ int main(int argc, char **argv) {
     test_slice_split_tail_works(length);
   }
   test_slice_from_copied_string_works();
+  test_slice_interning();
+  test_static_slice_interning();
+  test_static_slice_copy_interning();
   return 0;
 }
diff --git a/test/core/statistics/census_log_tests.c b/test/core/statistics/census_log_tests.c
index 8646a2fdf1..0f96f014ea 100644
--- a/test/core/statistics/census_log_tests.c
+++ b/test/core/statistics/census_log_tests.c
@@ -199,7 +199,7 @@ static void writer_thread(void *arg) {
          This should never happen for circular logs. */
       printf("   Writer stalled due to out-of-space: %d out of %d written\n",
              records_written, args->num_records);
-      gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10));
+      gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(10));
     }
   }
   /* Done. Decrement count and signal. */
diff --git a/test/core/support/BUILD b/test/core/support/BUILD
new file mode 100644
index 0000000000..dfe952eb37
--- /dev/null
+++ b/test/core/support/BUILD
@@ -0,0 +1,154 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+cc_test(
+    name = "alloc_test",
+    srcs = ["alloc_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "avl_test",
+    srcs = ["avl_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "backoff_test",
+    srcs = ["backoff_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "cmdline_test",
+    srcs = ["cmdline_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "cpu_test",
+    srcs = ["cpu_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "env_test",
+    srcs = ["env_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "histogram_test",
+    srcs = ["histogram_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "host_port_test",
+    srcs = ["host_port_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "log_test",
+    srcs = ["log_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "mpscq_test",
+    srcs = ["mpscq_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "murmur_hash_test",
+    srcs = ["murmur_hash_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "stack_lockfree_test",
+    srcs = ["stack_lockfree_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "string_test",
+    srcs = ["string_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "sync_test",
+    srcs = ["sync_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "thd_test",
+    srcs = ["thd_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "time_test",
+    srcs = ["time_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "tls_test",
+    srcs = ["tls_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
+
+cc_test(
+    name = "useful_test",
+    srcs = ["useful_test.c"],
+    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
+    copts = ['-std=c99']
+)
diff --git a/test/core/support/cpu_test.c b/test/core/support/cpu_test.c
index a5c52442ad..ca0fe0ccb5 100644
--- a/test/core/support/cpu_test.c
+++ b/test/core/support/cpu_test.c
@@ -81,9 +81,9 @@ static void worker_thread(void *arg) {
   uint32_t cpu;
   unsigned r = 12345678;
   unsigned i, j;
-  for (i = 0; i < 1000 / GRPC_TEST_SLOWDOWN_FACTOR; i++) {
+  for (i = 0; i < 1000 / grpc_test_slowdown_factor(); i++) {
     /* run for a bit - just calculate something random. */
-    for (j = 0; j < 1000000 / GRPC_TEST_SLOWDOWN_FACTOR; j++) {
+    for (j = 0; j < 1000000 / grpc_test_slowdown_factor(); j++) {
       r = (r * 17) & ((r - i) | (r * i));
     }
     cpu = gpr_cpu_current_cpu();
diff --git a/test/core/surface/alarm_test.c b/test/core/surface/alarm_test.c
index 054c328389..4afe357c27 100644
--- a/test/core/surface/alarm_test.c
+++ b/test/core/surface/alarm_test.c
@@ -64,9 +64,9 @@ static void test_alarm(void) {
     grpc_event ev;
     void *tag = create_test_tag();
     grpc_alarm *alarm =
-        grpc_alarm_create(cc, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), tag);
+        grpc_alarm_create(cc, grpc_timeout_seconds_to_deadline(1), tag);
 
-    ev = grpc_completion_queue_next(cc, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2),
+    ev = grpc_completion_queue_next(cc, grpc_timeout_seconds_to_deadline(2),
                                     NULL);
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
     GPR_ASSERT(ev.tag == tag);
@@ -78,10 +78,10 @@ static void test_alarm(void) {
     grpc_event ev;
     void *tag = create_test_tag();
     grpc_alarm *alarm =
-        grpc_alarm_create(cc, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2), tag);
+        grpc_alarm_create(cc, grpc_timeout_seconds_to_deadline(2), tag);
 
     grpc_alarm_cancel(alarm);
-    ev = grpc_completion_queue_next(cc, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1),
+    ev = grpc_completion_queue_next(cc, grpc_timeout_seconds_to_deadline(1),
                                     NULL);
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
     GPR_ASSERT(ev.tag == tag);
diff --git a/test/core/surface/byte_buffer_reader_test.c b/test/core/surface/byte_buffer_reader_test.c
index d8d7a52d15..2f1f72f0e0 100644
--- a/test/core/surface/byte_buffer_reader_test.c
+++ b/test/core/surface/byte_buffer_reader_test.c
@@ -40,9 +40,10 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include "test/core/util/test_config.h"
 
 #include "src/core/lib/compression/message_compress.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "test/core/util/test_config.h"
 
 #include <string.h>
 
@@ -145,7 +146,12 @@ static void read_compressed_slice(grpc_compression_algorithm algorithm,
   input_slice = grpc_slice_malloc(input_size);
   memset(GRPC_SLICE_START_PTR(input_slice), 'a', input_size);
   grpc_slice_buffer_add(&sliceb_in, input_slice); /* takes ownership */
-  GPR_ASSERT(grpc_msg_compress(algorithm, &sliceb_in, &sliceb_out));
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    GPR_ASSERT(
+        grpc_msg_compress(&exec_ctx, algorithm, &sliceb_in, &sliceb_out));
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 
   buffer = grpc_raw_compressed_byte_buffer_create(sliceb_out.slices,
                                                   sliceb_out.count, algorithm);
diff --git a/test/core/surface/completion_queue_test.c b/test/core/surface/completion_queue_test.c
index 1486d2508f..b8ea90921a 100644
--- a/test/core/surface/completion_queue_test.c
+++ b/test/core/surface/completion_queue_test.c
@@ -232,7 +232,7 @@ static void test_too_many_plucks(void) {
   }
 
   /* wait until all other threads are plucking */
-  gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(1000));
+  gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(1000));
 
   ev = grpc_completion_queue_pluck(cc, create_test_tag(),
                                    gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
@@ -266,7 +266,7 @@ typedef struct test_thread_options {
 } test_thread_options;
 
 gpr_timespec ten_seconds_time(void) {
-  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+  return grpc_timeout_seconds_to_deadline(10);
 }
 
 static void free_completion(grpc_exec_ctx *exec_ctx, void *arg,
diff --git a/test/core/surface/concurrent_connectivity_test.c b/test/core/surface/concurrent_connectivity_test.c
index 93a4794222..4f7a25ab93 100644
--- a/test/core/surface/concurrent_connectivity_test.c
+++ b/test/core/surface/concurrent_connectivity_test.c
@@ -70,11 +70,13 @@ void create_loop_destroy(void *addr) {
     grpc_channel *chan = grpc_insecure_channel_create((char *)addr, NULL, NULL);
 
     for (int j = 0; j < NUM_INNER_LOOPS; ++j) {
-      gpr_timespec later_time = GRPC_TIMEOUT_MILLIS_TO_DEADLINE(DELAY_MILLIS);
+      gpr_timespec later_time =
+          grpc_timeout_milliseconds_to_deadline(DELAY_MILLIS);
       grpc_connectivity_state state =
           grpc_channel_check_connectivity_state(chan, 1);
       grpc_channel_watch_connectivity_state(chan, state, later_time, cq, NULL);
-      gpr_timespec poll_time = GRPC_TIMEOUT_MILLIS_TO_DEADLINE(POLL_MILLIS);
+      gpr_timespec poll_time =
+          grpc_timeout_milliseconds_to_deadline(POLL_MILLIS);
       GPR_ASSERT(grpc_completion_queue_next(cq, poll_time, NULL).type ==
                  GRPC_OP_COMPLETE);
     }
@@ -107,7 +109,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *vargs, grpc_endpoint *tcp,
                        grpc_tcp_server_acceptor *acceptor) {
   gpr_free(acceptor);
   struct server_thread_args *args = (struct server_thread_args *)vargs;
-  grpc_endpoint_shutdown(exec_ctx, tcp);
+  grpc_endpoint_shutdown(exec_ctx, tcp, GRPC_ERROR_CREATE("Connected"));
   grpc_endpoint_destroy(exec_ctx, tcp);
   GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, NULL));
 }
@@ -229,9 +231,9 @@ int main(int argc, char **argv) {
   gpr_atm_rel_store(&args.stop, 1);
   gpr_thd_join(server);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_pollset_shutdown(
-      &exec_ctx, args.pollset,
-      grpc_closure_create(done_pollset_shutdown, args.pollset));
+  grpc_pollset_shutdown(&exec_ctx, args.pollset,
+                        grpc_closure_create(done_pollset_shutdown, args.pollset,
+                                            grpc_schedule_on_exec_ctx));
   grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_shutdown();
diff --git a/test/core/surface/lame_client_test.c b/test/core/surface/lame_client_test.c
index 6afcefca92..9deb50bb04 100644
--- a/test/core/surface/lame_client_test.c
+++ b/test/core/surface/lame_client_test.c
@@ -62,7 +62,8 @@ void test_transport_op(grpc_channel *channel) {
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
-  grpc_closure_init(&transport_op_cb, verify_connectivity, &state);
+  grpc_closure_init(&transport_op_cb, verify_connectivity, &state,
+                    grpc_schedule_on_exec_ctx);
 
   op = grpc_make_transport_op(NULL);
   op->on_connectivity_state_change = &transport_op_cb;
@@ -71,7 +72,8 @@ void test_transport_op(grpc_channel *channel) {
   elem->filter->start_transport_op(&exec_ctx, elem, op);
   grpc_exec_ctx_finish(&exec_ctx);
 
-  grpc_closure_init(&transport_op_cb, do_nothing, NULL);
+  grpc_closure_init(&transport_op_cb, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
   op = grpc_make_transport_op(&transport_op_cb);
   elem->filter->start_transport_op(&exec_ctx, elem, op);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -88,8 +90,7 @@ int main(int argc, char **argv) {
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   char *peer;
 
   grpc_test_init(argc, argv);
@@ -109,9 +110,10 @@ int main(int argc, char **argv) {
 
   cq = grpc_completion_queue_create(NULL);
 
+  grpc_slice host = grpc_slice_from_static_string("anywhere");
   call = grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
-                                  "/Foo", "anywhere",
-                                  GRPC_TIMEOUT_SECONDS_TO_DEADLINE(100), NULL);
+                                  grpc_slice_from_static_string("/Foo"), &host,
+                                  grpc_timeout_seconds_to_deadline(100), NULL);
   GPR_ASSERT(call);
   cqv = cq_verifier_create(cq);
 
@@ -123,7 +125,7 @@ int main(int argc, char **argv) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -140,7 +142,6 @@ int main(int argc, char **argv) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -162,7 +163,7 @@ int main(int argc, char **argv) {
 
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
 
   grpc_shutdown();
 
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index d4cfa25d44..e0a2c94216 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -42,6 +42,8 @@
 #include <grpc/impl/codegen/byte_buffer_reader.h>
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/connectivity_state.h>
+#include <grpc/impl/codegen/exec_ctx_fwd.h>
+#include <grpc/impl/codegen/gpr_slice.h>
 #include <grpc/impl/codegen/gpr_types.h>
 #include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/impl/codegen/port_platform.h>
diff --git a/test/core/surface/secure_channel_create_test.c b/test/core/surface/secure_channel_create_test.c
index 444ebdc093..567f8ae16e 100644
--- a/test/core/surface/secure_channel_create_test.c
+++ b/test/core/surface/secure_channel_create_test.c
@@ -43,43 +43,44 @@
 #include "test/core/util/test_config.h"
 
 void test_unknown_scheme_target(void) {
-  grpc_channel *chan;
-  grpc_channel_credentials *creds;
   grpc_resolver_registry_shutdown();
   grpc_resolver_registry_init();
-
-  creds = grpc_fake_transport_security_credentials_create();
-  chan = grpc_secure_channel_create(creds, "blah://blah", NULL, NULL);
-  GPR_ASSERT(chan == NULL);
-  grpc_channel_credentials_unref(creds);
+  grpc_channel_credentials *creds =
+      grpc_fake_transport_security_credentials_create();
+  grpc_channel *chan =
+      grpc_secure_channel_create(creds, "blah://blah", NULL, NULL);
+  grpc_channel_element *elem =
+      grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
+  GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
+  grpc_channel_credentials_unref(&exec_ctx, creds);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_security_connector_already_in_arg(void) {
-  grpc_channel *chan;
-  grpc_channel_element *elem;
-  grpc_channel_args args;
   grpc_arg arg;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-
   arg.type = GRPC_ARG_POINTER;
   arg.value.pointer.p = NULL;
-  arg.key = GRPC_SECURITY_CONNECTOR_ARG;
+  arg.key = GRPC_ARG_SECURITY_CONNECTOR;
+  grpc_channel_args args;
   args.num_args = 1;
   args.args = &arg;
-  chan = grpc_secure_channel_create(NULL, NULL, &args, NULL);
-  elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
+  grpc_channel *chan = grpc_secure_channel_create(NULL, NULL, &args, NULL);
+  grpc_channel_element *elem =
+      grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_null_creds(void) {
-  grpc_channel *chan;
-  grpc_channel_element *elem;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  chan = grpc_secure_channel_create(NULL, NULL, NULL, NULL);
-  elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
+  grpc_channel *chan = grpc_secure_channel_create(NULL, NULL, NULL, NULL);
+  grpc_channel_element *elem =
+      grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
   grpc_exec_ctx_finish(&exec_ctx);
 }
diff --git a/test/core/surface/sequential_connectivity_test.c b/test/core/surface/sequential_connectivity_test.c
index fe87f119f2..5f66f90037 100644
--- a/test/core/surface/sequential_connectivity_test.c
+++ b/test/core/surface/sequential_connectivity_test.c
@@ -39,6 +39,7 @@
 #include <grpc/support/thd.h>
 
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "test/core/end2end/data/ssl_test_data.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
@@ -90,7 +91,7 @@ static void run_test(const test_fixture *fixture) {
   for (size_t i = 0; i < NUM_CONNECTIONS; i++) {
     channels[i] = fixture->create_channel(addr);
 
-    gpr_timespec connect_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(30);
+    gpr_timespec connect_deadline = grpc_timeout_seconds_to_deadline(30);
     grpc_connectivity_state state;
     while ((state = grpc_channel_check_connectivity_state(channels[i], 1)) !=
            GRPC_CHANNEL_READY) {
@@ -162,7 +163,11 @@ static grpc_channel *secure_test_create_channel(const char *addr) {
       grpc_channel_args_copy_and_add(NULL, &ssl_name_override, 1);
   grpc_channel *channel =
       grpc_secure_channel_create(ssl_creds, addr, new_client_args, NULL);
-  grpc_channel_args_destroy(new_client_args);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args_destroy(&exec_ctx, new_client_args);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
   grpc_channel_credentials_release(ssl_creds);
   return channel;
 }
diff --git a/test/core/transport/bdp_estimator_test.c b/test/core/transport/bdp_estimator_test.c
new file mode 100644
index 0000000000..f55a3ca643
--- /dev/null
+++ b/test/core/transport/bdp_estimator_test.c
@@ -0,0 +1,153 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/transport/bdp_estimator.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/useful.h>
+#include <limits.h>
+#include "src/core/lib/support/string.h"
+#include "test/core/util/test_config.h"
+
+static void test_noop(void) {
+  gpr_log(GPR_INFO, "test_noop");
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+}
+
+static void test_get_estimate_no_samples(void) {
+  gpr_log(GPR_INFO, "test_get_estimate_no_samples");
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+  int64_t estimate;
+  grpc_bdp_estimator_get_estimate(&est, &estimate);
+}
+
+static void add_samples(grpc_bdp_estimator *estimator, int64_t *samples,
+                        size_t n) {
+  GPR_ASSERT(grpc_bdp_estimator_add_incoming_bytes(estimator, 1234567) == true);
+  grpc_bdp_estimator_schedule_ping(estimator);
+  grpc_bdp_estimator_start_ping(estimator);
+  for (size_t i = 0; i < n; i++) {
+    GPR_ASSERT(grpc_bdp_estimator_add_incoming_bytes(estimator, samples[i]) ==
+               false);
+  }
+  grpc_bdp_estimator_complete_ping(estimator);
+}
+
+static void add_sample(grpc_bdp_estimator *estimator, int64_t sample) {
+  add_samples(estimator, &sample, 1);
+}
+
+static void test_get_estimate_1_sample(void) {
+  gpr_log(GPR_INFO, "test_get_estimate_1_sample");
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+  add_sample(&est, 100);
+  int64_t estimate;
+  grpc_bdp_estimator_get_estimate(&est, &estimate);
+}
+
+static void test_get_estimate_2_samples(void) {
+  gpr_log(GPR_INFO, "test_get_estimate_2_samples");
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+  add_sample(&est, 100);
+  add_sample(&est, 100);
+  int64_t estimate;
+  grpc_bdp_estimator_get_estimate(&est, &estimate);
+}
+
+static int64_t get_estimate(grpc_bdp_estimator *estimator) {
+  int64_t out;
+  GPR_ASSERT(grpc_bdp_estimator_get_estimate(estimator, &out));
+  return out;
+}
+
+static void test_get_estimate_3_samples(void) {
+  gpr_log(GPR_INFO, "test_get_estimate_3_samples");
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+  add_sample(&est, 100);
+  add_sample(&est, 100);
+  add_sample(&est, 100);
+  int64_t estimate;
+  grpc_bdp_estimator_get_estimate(&est, &estimate);
+}
+
+static int64_t next_pow_2(int64_t v) {
+  v--;
+  v |= v >> 1;
+  v |= v >> 2;
+  v |= v >> 4;
+  v |= v >> 8;
+  v |= v >> 16;
+  v |= v >> 32;
+  v++;
+  return v;
+}
+
+static void test_get_estimate_random_values(size_t n) {
+  gpr_log(GPR_INFO, "test_get_estimate_random_values(%" PRIdPTR ")", n);
+  grpc_bdp_estimator est;
+  grpc_bdp_estimator_init(&est, "test");
+  int min = INT_MAX;
+  int max = 65535;  // Windows rand() has limited range, make sure the ASSERT
+                    // passes
+  for (size_t i = 0; i < n; i++) {
+    int sample = rand();
+    if (sample < min) min = sample;
+    if (sample > max) max = sample;
+    add_sample(&est, sample);
+    if (i >= 3) {
+      gpr_log(GPR_DEBUG, "est:%" PRId64 " min:%d max:%d", get_estimate(&est),
+              min, max);
+      GPR_ASSERT(get_estimate(&est) <= 2 * next_pow_2(max));
+    }
+  }
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  test_noop();
+  test_get_estimate_no_samples();
+  test_get_estimate_1_sample();
+  test_get_estimate_2_samples();
+  test_get_estimate_3_samples();
+  for (size_t i = 3; i < 1000; i = i * 3 / 2) {
+    test_get_estimate_random_values(i);
+  }
+  return 0;
+}
diff --git a/test/core/transport/chttp2/BUILD b/test/core/transport/chttp2/BUILD
new file mode 100644
index 0000000000..94b4830138
--- /dev/null
+++ b/test/core/transport/chttp2/BUILD
@@ -0,0 +1,40 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
+
+grpc_fuzzer(
+  name = "hpack_parser_fuzzer",
+  srcs = ["hpack_parser_fuzzer_test.c"],
+  deps = ["//:grpc", "//test/core/util:grpc_test_util"],
+  corpus = "hpack_parser_corpus"
+)
+
diff --git a/test/core/transport/chttp2/bin_decoder_test.c b/test/core/transport/chttp2/bin_decoder_test.c
index 7ddc30291a..a8b0a75137 100644
--- a/test/core/transport/chttp2/bin_decoder_test.c
+++ b/test/core/transport/chttp2/bin_decoder_test.c
@@ -38,14 +38,15 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 
 static int all_ok = 1;
 
-static void expect_slice_eq(grpc_slice expected, grpc_slice slice, char *debug,
-                            int line) {
-  if (0 != grpc_slice_cmp(slice, expected)) {
+static void expect_slice_eq(grpc_exec_ctx *exec_ctx, grpc_slice expected,
+                            grpc_slice slice, char *debug, int line) {
+  if (!grpc_slice_eq(slice, expected)) {
     char *hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     gpr_log(GPR_ERROR, "FAILED:%d: %s\ngot:  %s\nwant: %s", line, debug, hs,
@@ -54,92 +55,104 @@ static void expect_slice_eq(grpc_slice expected, grpc_slice slice, char *debug,
     gpr_free(he);
     all_ok = 0;
   }
-  grpc_slice_unref(expected);
-  grpc_slice_unref(slice);
+  grpc_slice_unref_internal(exec_ctx, expected);
+  grpc_slice_unref_internal(exec_ctx, slice);
 }
 
-static grpc_slice base64_encode(const char *s) {
+static grpc_slice base64_encode(grpc_exec_ctx *exec_ctx, const char *s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
   grpc_slice out = grpc_chttp2_base64_encode(ss);
-  grpc_slice_unref(ss);
+  grpc_slice_unref_internal(exec_ctx, ss);
   return out;
 }
 
-static grpc_slice base64_decode(const char *s) {
+static grpc_slice base64_decode(grpc_exec_ctx *exec_ctx, const char *s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out = grpc_chttp2_base64_decode(ss);
-  grpc_slice_unref(ss);
+  grpc_slice out = grpc_chttp2_base64_decode(exec_ctx, ss);
+  grpc_slice_unref_internal(exec_ctx, ss);
   return out;
 }
 
-static grpc_slice base64_decode_with_length(const char *s,
+static grpc_slice base64_decode_with_length(grpc_exec_ctx *exec_ctx,
+                                            const char *s,
                                             size_t output_length) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out = grpc_chttp2_base64_decode_with_length(ss, output_length);
-  grpc_slice_unref(ss);
+  grpc_slice out =
+      grpc_chttp2_base64_decode_with_length(exec_ctx, ss, output_length);
+  grpc_slice_unref_internal(exec_ctx, ss);
   return out;
 }
 
-#define EXPECT_SLICE_EQ(expected, slice)                                    \
-  expect_slice_eq(                                                          \
-      grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), slice, \
-      #slice, __LINE__);
+#define EXPECT_SLICE_EQ(exec_ctx, expected, slice)                             \
+  expect_slice_eq(                                                             \
+      exec_ctx, grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), \
+      slice, #slice, __LINE__);
 
-#define ENCODE_AND_DECODE(s) \
-  EXPECT_SLICE_EQ(           \
-      s, grpc_chttp2_base64_decode_with_length(base64_encode(s), strlen(s)));
+#define ENCODE_AND_DECODE(exec_ctx, s)                   \
+  EXPECT_SLICE_EQ(exec_ctx, s,                           \
+                  grpc_chttp2_base64_decode_with_length( \
+                      exec_ctx, base64_encode(exec_ctx, s), strlen(s)));
 
 int main(int argc, char **argv) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
   /* ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
      takes encoded base64 strings without pad chars, but output length is
      required. */
   /* Base64 test vectors from RFC 4648 */
-  ENCODE_AND_DECODE("");
-  ENCODE_AND_DECODE("f");
-  ENCODE_AND_DECODE("foo");
-  ENCODE_AND_DECODE("fo");
-  ENCODE_AND_DECODE("foob");
-  ENCODE_AND_DECODE("fooba");
-  ENCODE_AND_DECODE("foobar");
+  ENCODE_AND_DECODE(&exec_ctx, "");
+  ENCODE_AND_DECODE(&exec_ctx, "f");
+  ENCODE_AND_DECODE(&exec_ctx, "foo");
+  ENCODE_AND_DECODE(&exec_ctx, "fo");
+  ENCODE_AND_DECODE(&exec_ctx, "foob");
+  ENCODE_AND_DECODE(&exec_ctx, "fooba");
+  ENCODE_AND_DECODE(&exec_ctx, "foobar");
 
-  ENCODE_AND_DECODE("\xc0\xc1\xc2\xc3\xc4\xc5");
+  ENCODE_AND_DECODE(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5");
 
   /* Base64 test vectors from RFC 4648, with pad chars */
   /* BASE64("") = "" */
-  EXPECT_SLICE_EQ("", base64_decode(""));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, ""));
   /* BASE64("f") = "Zg==" */
-  EXPECT_SLICE_EQ("f", base64_decode("Zg=="));
+  EXPECT_SLICE_EQ(&exec_ctx, "f", base64_decode(&exec_ctx, "Zg=="));
   /* BASE64("fo") = "Zm8=" */
-  EXPECT_SLICE_EQ("fo", base64_decode("Zm8="));
+  EXPECT_SLICE_EQ(&exec_ctx, "fo", base64_decode(&exec_ctx, "Zm8="));
   /* BASE64("foo") = "Zm9v" */
-  EXPECT_SLICE_EQ("foo", base64_decode("Zm9v"));
+  EXPECT_SLICE_EQ(&exec_ctx, "foo", base64_decode(&exec_ctx, "Zm9v"));
   /* BASE64("foob") = "Zm9vYg==" */
-  EXPECT_SLICE_EQ("foob", base64_decode("Zm9vYg=="));
+  EXPECT_SLICE_EQ(&exec_ctx, "foob", base64_decode(&exec_ctx, "Zm9vYg=="));
   /* BASE64("fooba") = "Zm9vYmE=" */
-  EXPECT_SLICE_EQ("fooba", base64_decode("Zm9vYmE="));
+  EXPECT_SLICE_EQ(&exec_ctx, "fooba", base64_decode(&exec_ctx, "Zm9vYmE="));
   /* BASE64("foobar") = "Zm9vYmFy" */
-  EXPECT_SLICE_EQ("foobar", base64_decode("Zm9vYmFy"));
+  EXPECT_SLICE_EQ(&exec_ctx, "foobar", base64_decode(&exec_ctx, "Zm9vYmFy"));
 
-  EXPECT_SLICE_EQ("\xc0\xc1\xc2\xc3\xc4\xc5", base64_decode("wMHCw8TF"));
+  EXPECT_SLICE_EQ(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5",
+                  base64_decode(&exec_ctx, "wMHCw8TF"));
 
   // Test illegal input length in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ("", base64_decode("a"));
-  EXPECT_SLICE_EQ("", base64_decode("ab"));
-  EXPECT_SLICE_EQ("", base64_decode("abc"));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "a"));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "ab"));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "abc"));
 
   // Test illegal charactors in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ("", base64_decode("Zm:v"));
-  EXPECT_SLICE_EQ("", base64_decode("Zm=v"));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm:v"));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm=v"));
 
   // Test output_length longer than max possible output length in
   // grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ("", base64_decode_with_length("Zg", 2));
-  EXPECT_SLICE_EQ("", base64_decode_with_length("Zm8", 3));
-  EXPECT_SLICE_EQ("", base64_decode_with_length("Zm9v", 4));
+  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode_with_length(&exec_ctx, "Zg", 2));
+  EXPECT_SLICE_EQ(&exec_ctx, "",
+                  base64_decode_with_length(&exec_ctx, "Zm8", 3));
+  EXPECT_SLICE_EQ(&exec_ctx, "",
+                  base64_decode_with_length(&exec_ctx, "Zm9v", 4));
 
   // Test illegal charactors in grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ("", base64_decode_with_length("Zm:v", 3));
-  EXPECT_SLICE_EQ("", base64_decode_with_length("Zm=v", 3));
+  EXPECT_SLICE_EQ(&exec_ctx, "",
+                  base64_decode_with_length(&exec_ctx, "Zm:v", 3));
+  EXPECT_SLICE_EQ(&exec_ctx, "",
+                  base64_decode_with_length(&exec_ctx, "Zm=v", 3));
+
+  grpc_exec_ctx_finish(&exec_ctx);
 
   return all_ok ? 0 : 1;
 }
diff --git a/test/core/transport/chttp2/bin_encoder_test.c b/test/core/transport/chttp2/bin_encoder_test.c
index 53b55a301e..bd10a1e211 100644
--- a/test/core/transport/chttp2/bin_encoder_test.c
+++ b/test/core/transport/chttp2/bin_encoder_test.c
@@ -48,7 +48,7 @@ static int all_ok = 1;
 
 static void expect_slice_eq(grpc_slice expected, grpc_slice slice, char *debug,
                             int line) {
-  if (0 != grpc_slice_cmp(slice, expected)) {
+  if (!grpc_slice_eq(slice, expected)) {
     char *hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     gpr_log(GPR_ERROR, "FAILED:%d: %s\ngot:  %s\nwant: %s", line, debug, hs,
@@ -84,8 +84,8 @@ static void expect_combined_equiv(const char *s, size_t len, int line) {
   grpc_slice input = grpc_slice_from_copied_buffer(s, len);
   grpc_slice base64 = grpc_chttp2_base64_encode(input);
   grpc_slice expect = grpc_chttp2_huffman_compress(base64);
-  grpc_slice got = grpc_chttp2_base64_encode_and_huffman_compress_impl(input);
-  if (0 != grpc_slice_cmp(expect, got)) {
+  grpc_slice got = grpc_chttp2_base64_encode_and_huffman_compress(input);
+  if (!grpc_slice_eq(expect, got)) {
     char *t = grpc_dump_slice(input, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *e = grpc_dump_slice(expect, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *g = grpc_dump_slice(got, GPR_DUMP_HEX | GPR_DUMP_ASCII);
@@ -106,7 +106,7 @@ static void expect_combined_equiv(const char *s, size_t len, int line) {
   expect_combined_equiv(x, sizeof(x) - 1, __LINE__)
 
 static void expect_binary_header(const char *hdr, int binary) {
-  if (grpc_is_binary_header(hdr, strlen(hdr)) != binary) {
+  if (grpc_is_binary_header(grpc_slice_from_static_string(hdr)) != binary) {
     gpr_log(GPR_ERROR, "FAILED: expected header '%s' to be %s", hdr,
             binary ? "binary" : "not binary");
     all_ok = 0;
diff --git a/test/core/transport/chttp2/hpack_encoder_test.c b/test/core/transport/chttp2/hpack_encoder_test.c
index 91421e18f4..d572d79a7f 100644
--- a/test/core/transport/chttp2/hpack_encoder_test.c
+++ b/test/core/transport/chttp2/hpack_encoder_test.c
@@ -41,6 +41,7 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/ext/transport/chttp2/transport/hpack_parser.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/slice/slice_string_helpers.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/metadata.h"
@@ -59,8 +60,9 @@ size_t cap_to_delete = 0;
 
 /* verify that the output generated by encoding the stream matches the
    hexstring passed in */
-static void verify(size_t window_available, int eof, size_t expect_window_used,
-                   const char *expected, size_t nheaders, ...) {
+static void verify(grpc_exec_ctx *exec_ctx, size_t window_available, int eof,
+                   size_t expect_window_used, const char *expected,
+                   size_t nheaders, ...) {
   grpc_slice_buffer output;
   grpc_slice merged;
   grpc_slice expect = parse_hexstring(expected);
@@ -79,7 +81,9 @@ static void verify(size_t window_available, int eof, size_t expect_window_used,
       e[i - 1].next = &e[i];
       e[i].prev = &e[i - 1];
     }
-    e[i].md = grpc_mdelem_from_strings(key, value);
+    e[i].md = grpc_mdelem_from_slices(
+        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
+        grpc_slice_intern(grpc_slice_from_static_string(value)));
   }
   e[0].prev = NULL;
   e[nheaders - 1].next = NULL;
@@ -87,6 +91,7 @@ static void verify(size_t window_available, int eof, size_t expect_window_used,
 
   b.list.head = &e[0];
   b.list.tail = &e[nheaders - 1];
+  b.list.count = nheaders;
 
   if (cap_to_delete == num_to_delete) {
     cap_to_delete = GPR_MAX(2 * cap_to_delete, 1000);
@@ -98,13 +103,13 @@ static void verify(size_t window_available, int eof, size_t expect_window_used,
 
   grpc_transport_one_way_stats stats;
   memset(&stats, 0, sizeof(stats));
-  grpc_chttp2_encode_header(&g_compressor, 0xdeadbeef, &b, eof, 16384, &stats,
-                            &output);
+  grpc_chttp2_encode_header(exec_ctx, &g_compressor, 0xdeadbeef, &b, eof, 16384,
+                            &stats, &output);
   merged = grpc_slice_merge(output.slices, output.count);
-  grpc_slice_buffer_destroy(&output);
-  grpc_metadata_batch_destroy(&b);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
+  grpc_metadata_batch_destroy(exec_ctx, &b);
 
-  if (0 != grpc_slice_cmp(merged, expect)) {
+  if (!grpc_slice_eq(merged, expect)) {
     char *expect_str = grpc_dump_slice(expect, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *got_str = grpc_dump_slice(merged, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     gpr_log(GPR_ERROR, "mismatched output for %s", expected);
@@ -115,31 +120,32 @@ static void verify(size_t window_available, int eof, size_t expect_window_used,
     g_failure = 1;
   }
 
-  grpc_slice_unref(merged);
-  grpc_slice_unref(expect);
+  grpc_slice_unref_internal(exec_ctx, merged);
+  grpc_slice_unref_internal(exec_ctx, expect);
 }
 
-static void test_basic_headers(void) {
+static void test_basic_headers(grpc_exec_ctx *exec_ctx) {
   int i;
 
-  verify(0, 0, 0, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
-  verify(0, 0, 0, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(0, 0, 0, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(0, 0, 0, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a", "b",
+  verify(exec_ctx, 0, 0, 0, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
+  verify(exec_ctx, 0, 0, 0, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(exec_ctx, 0, 0, 0, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(exec_ctx, 0, 0, 0, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a",
+         "b", "c");
+  verify(exec_ctx, 0, 0, 0, "000002 0104 deadbeef bf be", 2, "a", "a", "b",
          "c");
-  verify(0, 0, 0, "000002 0104 deadbeef bf be", 2, "a", "a", "b", "c");
-  verify(0, 0, 0, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
+  verify(exec_ctx, 0, 0, 0, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
 
   /* flush out what's there to make a few values look very popular */
   for (i = 0; i < 350; i++) {
-    verify(0, 0, 0, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b", "c", "a",
-           "d");
+    verify(exec_ctx, 0, 0, 0, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b",
+           "c", "a", "d");
   }
 
-  verify(0, 0, 0, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a", "k",
-         "v");
+  verify(exec_ctx, 0, 0, 0, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a",
+         "k", "v");
   /* this could be 000004 0104 deadbeef 0f 30 0176 also */
-  verify(0, 0, 0, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
+  verify(exec_ctx, 0, 0, 0, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
 }
 
 static void encode_int_to_str(int i, char *p) {
@@ -150,7 +156,7 @@ static void encode_int_to_str(int i, char *p) {
   p[2] = 0;
 }
 
-static void test_decode_table_overflow(void) {
+static void test_decode_table_overflow(grpc_exec_ctx *exec_ctx) {
   int i;
   char key[3], value[3];
   char *expect;
@@ -173,22 +179,26 @@ static void test_decode_table_overflow(void) {
     }
 
     if (i > 0) {
-      verify(0, 0, 0, expect, 2, "aa", "ba", key, value);
+      verify(exec_ctx, 0, 0, 0, expect, 2, "aa", "ba", key, value);
     } else {
-      verify(0, 0, 0, expect, 1, key, value);
+      verify(exec_ctx, 0, 0, 0, expect, 1, key, value);
     }
     gpr_free(expect);
   }
 
   /* if the above passes, then we must have just knocked this pair out of the
      decoder stack, and so we'll be forced to re-encode it */
-  verify(0, 0, 0, "000007 0104 deadbeef 40 026161 026261", 1, "aa", "ba");
+  verify(exec_ctx, 0, 0, 0, "000007 0104 deadbeef 40 026161 026261", 1, "aa",
+         "ba");
 }
 
-static void verify_table_size_change_match_elem_size(const char *key,
+static void verify_table_size_change_match_elem_size(grpc_exec_ctx *exec_ctx,
+                                                     const char *key,
                                                      const char *value) {
   grpc_slice_buffer output;
-  grpc_mdelem *elem = grpc_mdelem_from_strings(key, value);
+  grpc_mdelem elem = grpc_mdelem_from_slices(
+      exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
+      grpc_slice_intern(grpc_slice_from_static_string(value)));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem);
   size_t initial_table_size = g_compressor.table_size;
   grpc_linked_mdelem *e = gpr_malloc(sizeof(*e));
@@ -199,34 +209,37 @@ static void verify_table_size_change_match_elem_size(const char *key,
   e[0].next = NULL;
   b.list.head = &e[0];
   b.list.tail = &e[0];
+  b.list.count = 1;
   grpc_slice_buffer_init(&output);
 
   grpc_transport_one_way_stats stats;
   memset(&stats, 0, sizeof(stats));
-  grpc_chttp2_encode_header(&g_compressor, 0xdeadbeef, &b, 0, 16384, &stats,
-                            &output);
-  grpc_slice_buffer_destroy(&output);
-  grpc_metadata_batch_destroy(&b);
+  grpc_chttp2_encode_header(exec_ctx, &g_compressor, 0xdeadbeef, &b, 0, 16384,
+                            &stats, &output);
+  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
+  grpc_metadata_batch_destroy(exec_ctx, &b);
 
   GPR_ASSERT(g_compressor.table_size == elem_size + initial_table_size);
   gpr_free(e);
 }
 
-static void test_encode_header_size(void) {
-  verify_table_size_change_match_elem_size("hello", "world");
-  verify_table_size_change_match_elem_size("hello-bin", "world");
+static void test_encode_header_size(grpc_exec_ctx *exec_ctx) {
+  verify_table_size_change_match_elem_size(exec_ctx, "hello", "world");
+  verify_table_size_change_match_elem_size(exec_ctx, "hello-bin", "world");
 }
 
-static void run_test(void (*test)(), const char *name) {
+static void run_test(void (*test)(grpc_exec_ctx *exec_ctx), const char *name) {
   gpr_log(GPR_INFO, "RUN TEST: %s", name);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_chttp2_hpack_compressor_init(&g_compressor);
-  test();
-  grpc_chttp2_hpack_compressor_destroy(&g_compressor);
+  test(&exec_ctx);
+  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &g_compressor);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
   size_t i;
-  grpc_test_only_set_metadata_hash_seed(0);
+  grpc_test_only_set_slice_hash_seed(0);
   grpc_test_init(argc, argv);
   grpc_init();
   TEST(test_basic_headers);
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/051268ade45dbed0aab896d7d9f4d10ba89d3b09 b/test/core/transport/chttp2/hpack_parser_corpus/051268ade45dbed0aab896d7d9f4d10ba89d3b09
new file mode 100644
index 0000000000..70967ff47f
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/051268ade45dbed0aab896d7d9f4d10ba89d3b09
@@ -0,0 +1 @@
+*¤¤¤ð¤-bin‹c[)(ð¤-bin-'bin	!!?¤Ûð!ð{(-binð	!\	!å7é;?Gí([(!!\ð*¤¤Ûð
\ No newline at end of file
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/5278e3581c069624157fd9176eddf52c0e58df67 b/test/core/transport/chttp2/hpack_parser_corpus/5278e3581c069624157fd9176eddf52c0e58df67
new file mode 100644
index 0000000000..8f3d4a9d34
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/5278e3581c069624157fd9176eddf52c0e58df67
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/bc4263a92952d56168b354f723eaa43a33cd0b35 b/test/core/transport/chttp2/hpack_parser_corpus/bc4263a92952d56168b354f723eaa43a33cd0b35
new file mode 100644
index 0000000000..d62e767643
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/bc4263a92952d56168b354f723eaa43a33cd0b35
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/crash-5ac3e1ea7764cfb6383629574262f82dc7b3cada b/test/core/transport/chttp2/hpack_parser_corpus/crash-5ac3e1ea7764cfb6383629574262f82dc7b3cada
new file mode 100644
index 0000000000..44984f3362
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/crash-5ac3e1ea7764cfb6383629574262f82dc7b3cada
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/d6d8b478e6d13945f7a6f7d27f424ff57ca12f7f b/test/core/transport/chttp2/hpack_parser_corpus/d6d8b478e6d13945f7a6f7d27f424ff57ca12f7f
new file mode 100644
index 0000000000..ace84afe5b
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/d6d8b478e6d13945f7a6f7d27f424ff57ca12f7f
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/e67c79d0ed89ab2d5e8d81127df22876e636ac44 b/test/core/transport/chttp2/hpack_parser_corpus/e67c79d0ed89ab2d5e8d81127df22876e636ac44
new file mode 100644
index 0000000000..600b6cd000
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/e67c79d0ed89ab2d5e8d81127df22876e636ac44
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/f4b48c4f3f310ed767755267210f212dd62bd715 b/test/core/transport/chttp2/hpack_parser_corpus/f4b48c4f3f310ed767755267210f212dd62bd715
new file mode 100644
index 0000000000..49ea9081b8
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/f4b48c4f3f310ed767755267210f212dd62bd715
diff --git a/test/core/transport/chttp2/hpack_parser_corpus/fcc06696e641a7743bfd2f3b7ecd88e7b727e00a b/test/core/transport/chttp2/hpack_parser_corpus/fcc06696e641a7743bfd2f3b7ecd88e7b727e00a
new file mode 100644
index 0000000000..f79c824bd1
--- /dev/null
+++ b/test/core/transport/chttp2/hpack_parser_corpus/fcc06696e641a7743bfd2f3b7ecd88e7b727e00a
@@ -0,0 +1 @@
+;?'cð[(!	ð[N!\	!åGý!acceptý.:¤cA)(!)í!¼ª)ågÝI)(Ù;)Š
\ No newline at end of file
diff --git a/test/core/transport/chttp2/hpack_parser_fuzzer_test.c b/test/core/transport/chttp2/hpack_parser_fuzzer_test.c
index 95acbf1a68..e9ac16df2d 100644
--- a/test/core/transport/chttp2/hpack_parser_fuzzer_test.c
+++ b/test/core/transport/chttp2/hpack_parser_fuzzer_test.c
@@ -39,27 +39,28 @@
 #include <grpc/support/log.h>
 
 #include "src/core/ext/transport/chttp2/transport/hpack_parser.h"
+#include "src/core/lib/slice/slice_internal.h"
 
 bool squelch = true;
 bool leak_check = true;
 
-static void onhdr(grpc_exec_ctx *exec_ctx, void *ud, grpc_mdelem *md) {
-  GRPC_MDELEM_UNREF(md);
+static void onhdr(grpc_exec_ctx *exec_ctx, void *ud, grpc_mdelem md) {
+  GRPC_MDELEM_UNREF(exec_ctx, md);
 }
 static void dont_log(gpr_log_func_args *args) {}
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  grpc_test_only_set_metadata_hash_seed(0);
+  grpc_test_only_set_slice_hash_seed(0);
   if (squelch) gpr_set_log_function(dont_log);
   grpc_init();
   grpc_chttp2_hpack_parser parser;
-  grpc_chttp2_hpack_parser_init(&parser);
-  parser.on_header = onhdr;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_ERROR_UNREF(
-      grpc_chttp2_hpack_parser_parse(&exec_ctx, &parser, data, data + size));
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  parser.on_header = onhdr;
+  GRPC_ERROR_UNREF(grpc_chttp2_hpack_parser_parse(
+      &exec_ctx, &parser, grpc_slice_from_static_buffer(data, size)));
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
   grpc_exec_ctx_finish(&exec_ctx);
-  grpc_chttp2_hpack_parser_destroy(&parser);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/chttp2/hpack_parser_test.c b/test/core/transport/chttp2/hpack_parser_test.c
index e2813df70c..01789c4fb4 100644
--- a/test/core/transport/chttp2/hpack_parser_test.c
+++ b/test/core/transport/chttp2/hpack_parser_test.c
@@ -45,16 +45,16 @@
 
 typedef struct { va_list args; } test_checker;
 
-static void onhdr(grpc_exec_ctx *exec_ctx, void *ud, grpc_mdelem *md) {
+static void onhdr(grpc_exec_ctx *exec_ctx, void *ud, grpc_mdelem md) {
   const char *ekey, *evalue;
   test_checker *chk = ud;
   ekey = va_arg(chk->args, char *);
   GPR_ASSERT(ekey);
   evalue = va_arg(chk->args, char *);
   GPR_ASSERT(evalue);
-  GPR_ASSERT(grpc_slice_str_cmp(md->key->slice, ekey) == 0);
-  GPR_ASSERT(grpc_slice_str_cmp(md->value->slice, evalue) == 0);
-  GRPC_MDELEM_UNREF(md);
+  GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(md), ekey) == 0);
+  GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(md), evalue) == 0);
+  GRPC_MDELEM_UNREF(exec_ctx, md);
 }
 
 static void test_vector(grpc_chttp2_hpack_parser *parser,
@@ -76,9 +76,8 @@ static void test_vector(grpc_chttp2_hpack_parser *parser,
 
   for (i = 0; i < nslices; i++) {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(
-                   &exec_ctx, parser, GRPC_SLICE_START_PTR(slices[i]),
-                   GRPC_SLICE_END_PTR(slices[i])) == GRPC_ERROR_NONE);
+    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(&exec_ctx, parser, slices[i]) ==
+               GRPC_ERROR_NONE);
     grpc_exec_ctx_finish(&exec_ctx);
   }
 
@@ -94,8 +93,9 @@ static void test_vector(grpc_chttp2_hpack_parser *parser,
 
 static void test_vectors(grpc_slice_split_mode mode) {
   grpc_chttp2_hpack_parser parser;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
-  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
   /* D.2.1 */
   test_vector(&parser, mode,
               "400a 6375 7374 6f6d 2d6b 6579 0d63 7573"
@@ -111,9 +111,9 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "password", "secret", NULL);
   /* D.2.4 */
   test_vector(&parser, mode, "82", ":method", "GET", NULL);
-  grpc_chttp2_hpack_parser_destroy(&parser);
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
 
-  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
   /* D.3.1 */
   test_vector(&parser, mode,
               "8286 8441 0f77 7777 2e65 7861 6d70 6c65"
@@ -131,9 +131,9 @@ static void test_vectors(grpc_slice_split_mode mode) {
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&parser);
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
 
-  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
   /* D.4.1 */
   test_vector(&parser, mode,
               "8286 8441 8cf1 e3c2 e5f2 3a6b a0ab 90f4"
@@ -151,11 +151,11 @@ static void test_vectors(grpc_slice_split_mode mode) {
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&parser);
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
 
-  grpc_chttp2_hpack_parser_init(&parser);
-  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
   /* D.5.1 */
   test_vector(&parser, mode,
               "4803 3330 3258 0770 7269 7661 7465 611d"
@@ -185,11 +185,11 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&parser);
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
 
-  grpc_chttp2_hpack_parser_init(&parser);
-  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
   /* D.6.1 */
   test_vector(&parser, mode,
               "4882 6402 5885 aec3 771a 4b61 96d0 7abe"
@@ -216,7 +216,9 @@ static void test_vectors(grpc_slice_split_mode mode) {
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&parser);
+  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/transport/chttp2/hpack_table_test.c b/test/core/transport/chttp2/hpack_table_test.c
index 1a7e2442ca..d2f6d5dc5b 100644
--- a/test/core/transport/chttp2/hpack_table_test.c
+++ b/test/core/transport/chttp2/hpack_table_test.c
@@ -46,22 +46,23 @@
 
 #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x)
 
-static void assert_str(const grpc_chttp2_hptbl *tbl, grpc_mdstr *mdstr,
+static void assert_str(const grpc_chttp2_hptbl *tbl, grpc_slice mdstr,
                        const char *str) {
-  GPR_ASSERT(grpc_slice_str_cmp(mdstr->slice, str) == 0);
+  GPR_ASSERT(grpc_slice_str_cmp(mdstr, str) == 0);
 }
 
 static void assert_index(const grpc_chttp2_hptbl *tbl, uint32_t idx,
                          const char *key, const char *value) {
-  grpc_mdelem *md = grpc_chttp2_hptbl_lookup(tbl, idx);
-  assert_str(tbl, md->key, key);
-  assert_str(tbl, md->value, value);
+  grpc_mdelem md = grpc_chttp2_hptbl_lookup(tbl, idx);
+  assert_str(tbl, GRPC_MDKEY(md), key);
+  assert_str(tbl, GRPC_MDVALUE(md), value);
 }
 
 static void test_static_lookup(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_chttp2_hptbl tbl;
 
-  grpc_chttp2_hptbl_init(&tbl);
+  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
 
   LOG_TEST("test_static_lookup");
   assert_index(&tbl, 1, ":authority", "");
@@ -126,7 +127,8 @@ static void test_static_lookup(void) {
   assert_index(&tbl, 60, "via", "");
   assert_index(&tbl, 61, "www-authenticate", "");
 
-  grpc_chttp2_hptbl_destroy(&tbl);
+  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_many_additions(void) {
@@ -137,15 +139,18 @@ static void test_many_additions(void) {
 
   LOG_TEST("test_many_additions");
 
-  grpc_chttp2_hptbl_init(&tbl);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
 
   for (i = 0; i < 100000; i++) {
-    grpc_mdelem *elem;
+    grpc_mdelem elem;
     gpr_asprintf(&key, "K:%d", i);
     gpr_asprintf(&value, "VALUE:%d", i);
-    elem = grpc_mdelem_from_strings(key, value);
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(elem);
+    elem =
+        grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
+                                grpc_slice_from_copied_string(value));
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(&exec_ctx, elem);
     assert_index(&tbl, 1 + GRPC_CHTTP2_LAST_STATIC_ENTRY, key, value);
     gpr_free(key);
     gpr_free(value);
@@ -158,37 +163,48 @@ static void test_many_additions(void) {
     }
   }
 
-  grpc_chttp2_hptbl_destroy(&tbl);
+  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static grpc_chttp2_hptbl_find_result find_simple(grpc_chttp2_hptbl *tbl,
                                                  const char *key,
                                                  const char *value) {
-  grpc_mdelem *md = grpc_mdelem_from_strings(key, value);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_mdelem md =
+      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
+                              grpc_slice_from_copied_string(value));
   grpc_chttp2_hptbl_find_result r = grpc_chttp2_hptbl_find(tbl, md);
-  GRPC_MDELEM_UNREF(md);
+  GRPC_MDELEM_UNREF(&exec_ctx, md);
+  grpc_exec_ctx_finish(&exec_ctx);
   return r;
 }
 
 static void test_find(void) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_chttp2_hptbl tbl;
   uint32_t i;
   char buffer[32];
-  grpc_mdelem *elem;
+  grpc_mdelem elem;
   grpc_chttp2_hptbl_find_result r;
 
   LOG_TEST("test_find");
 
-  grpc_chttp2_hptbl_init(&tbl);
-  elem = grpc_mdelem_from_strings("abc", "xyz");
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(elem);
-  elem = grpc_mdelem_from_strings("abc", "123");
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(elem);
-  elem = grpc_mdelem_from_strings("x", "1");
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(elem);
+  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
+  elem =
+      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
+                              grpc_slice_from_static_string("xyz"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(&exec_ctx, elem);
+  elem =
+      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
+                              grpc_slice_from_static_string("123"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(&exec_ctx, elem);
+  elem = grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("x"),
+                                 grpc_slice_from_static_string("1"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(&exec_ctx, elem);
 
   r = find_simple(&tbl, "abc", "123");
   GPR_ASSERT(r.index == 2 + GRPC_CHTTP2_LAST_STATIC_ENTRY);
@@ -237,9 +253,11 @@ static void test_find(void) {
   /* overflow the string buffer, check find still works */
   for (i = 0; i < 10000; i++) {
     int64_ttoa(i, buffer);
-    elem = grpc_mdelem_from_strings("test", buffer);
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(elem);
+    elem = grpc_mdelem_from_slices(&exec_ctx,
+                                   grpc_slice_from_static_string("test"),
+                                   grpc_slice_from_copied_string(buffer));
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(&exec_ctx, elem);
   }
 
   r = find_simple(&tbl, "abc", "123");
@@ -267,7 +285,8 @@ static void test_find(void) {
   GPR_ASSERT(r.index != 0);
   GPR_ASSERT(r.has_value == 0);
 
-  grpc_chttp2_hptbl_destroy(&tbl);
+  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/transport/chttp2/varint_test.c b/test/core/transport/chttp2/varint_test.c
index e29be4b056..f12c340a4b 100644
--- a/test/core/transport/chttp2/varint_test.c
+++ b/test/core/transport/chttp2/varint_test.c
@@ -49,7 +49,7 @@ static void test_varint(uint32_t value, uint32_t prefix_bits, uint8_t prefix_or,
   slice = grpc_slice_malloc(nbytes);
   GRPC_CHTTP2_WRITE_VARINT(value, prefix_bits, prefix_or,
                            GRPC_SLICE_START_PTR(slice), nbytes);
-  GPR_ASSERT(grpc_slice_cmp(expect, slice) == 0);
+  GPR_ASSERT(grpc_slice_eq(expect, slice));
   grpc_slice_unref(expect);
   grpc_slice_unref(slice);
 }
diff --git a/test/core/transport/connectivity_state_test.c b/test/core/transport/connectivity_state_test.c
index 1050059eff..3520ef0a80 100644
--- a/test/core/transport/connectivity_state_test.c
+++ b/test/core/transport/connectivity_state_test.c
@@ -86,7 +86,8 @@ static void test_check(void) {
 
 static void test_subscribe_then_unsubscribe(void) {
   grpc_connectivity_state_tracker tracker;
-  grpc_closure *closure = grpc_closure_create(must_fail, THE_ARG);
+  grpc_closure *closure =
+      grpc_closure_create(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_log(GPR_DEBUG, "test_subscribe_then_unsubscribe");
@@ -109,7 +110,8 @@ static void test_subscribe_then_unsubscribe(void) {
 
 static void test_subscribe_then_destroy(void) {
   grpc_connectivity_state_tracker tracker;
-  grpc_closure *closure = grpc_closure_create(must_succeed, THE_ARG);
+  grpc_closure *closure =
+      grpc_closure_create(must_succeed, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_log(GPR_DEBUG, "test_subscribe_then_destroy");
@@ -128,7 +130,8 @@ static void test_subscribe_then_destroy(void) {
 
 static void test_subscribe_with_failure_then_destroy(void) {
   grpc_connectivity_state_tracker tracker;
-  grpc_closure *closure = grpc_closure_create(must_fail, THE_ARG);
+  grpc_closure *closure =
+      grpc_closure_create(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_SHUTDOWN;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_log(GPR_DEBUG, "test_subscribe_with_failure_then_destroy");
diff --git a/test/core/transport/metadata_test.c b/test/core/transport/metadata_test.c
index 5c89d8530a..92e58f2375 100644
--- a/test/core/transport/metadata_test.c
+++ b/test/core/transport/metadata_test.c
@@ -42,114 +42,198 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/lib/slice/slice_internal.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/static_metadata.h"
 #include "test/core/util/test_config.h"
 
-#define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x)
-
 /* a large number */
 #define MANY 10000
 
 static void test_no_op(void) {
-  LOG_TEST("test_no_op");
+  gpr_log(GPR_INFO, "test_no_op");
   grpc_init();
   grpc_shutdown();
 }
 
-static void test_create_string(void) {
-  grpc_mdstr *s1, *s2, *s3;
-
-  LOG_TEST("test_create_string");
+static grpc_slice maybe_intern(grpc_slice in, bool intern) {
+  grpc_slice out = intern ? grpc_slice_intern(in) : grpc_slice_ref(in);
+  grpc_slice_unref(in);
+  return out;
+}
 
-  grpc_init();
-  s1 = grpc_mdstr_from_string("hello");
-  s2 = grpc_mdstr_from_string("hello");
-  s3 = grpc_mdstr_from_string("very much not hello");
-  GPR_ASSERT(s1 == s2);
-  GPR_ASSERT(s3 != s1);
-  GPR_ASSERT(grpc_slice_str_cmp(s1->slice, "hello") == 0);
-  GPR_ASSERT(grpc_slice_str_cmp(s3->slice, "very much not hello") == 0);
-  GRPC_MDSTR_UNREF(s1);
-  GRPC_MDSTR_UNREF(s2);
-  GRPC_MDSTR_UNREF(s3);
-  grpc_shutdown();
+static grpc_slice maybe_dup(grpc_slice in, bool dup) {
+  grpc_slice out = dup ? grpc_slice_dup(in) : grpc_slice_ref(in);
+  grpc_slice_unref(in);
+  return out;
 }
 
-static void test_create_metadata(void) {
-  grpc_mdelem *m1, *m2, *m3;
+static void test_create_metadata(bool intern_keys, bool intern_values) {
+  grpc_mdelem m1, m2, m3;
 
-  LOG_TEST("test_create_metadata");
+  gpr_log(GPR_INFO, "test_create_metadata: intern_keys=%d intern_values=%d",
+          intern_keys, intern_values);
 
   grpc_init();
-  m1 = grpc_mdelem_from_strings("a", "b");
-  m2 = grpc_mdelem_from_strings("a", "b");
-  m3 = grpc_mdelem_from_strings("a", "c");
-  GPR_ASSERT(m1 == m2);
-  GPR_ASSERT(m3 != m1);
-  GPR_ASSERT(m3->key == m1->key);
-  GPR_ASSERT(m3->value != m1->value);
-  GPR_ASSERT(grpc_slice_str_cmp(m1->key->slice, "a") == 0);
-  GPR_ASSERT(grpc_slice_str_cmp(m1->value->slice, "b") == 0);
-  GPR_ASSERT(grpc_slice_str_cmp(m3->value->slice, "c") == 0);
-  GRPC_MDELEM_UNREF(m1);
-  GRPC_MDELEM_UNREF(m2);
-  GRPC_MDELEM_UNREF(m3);
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  m1 = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("b"), intern_values));
+  m2 = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("b"), intern_values));
+  m3 = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("c"), intern_values));
+  GPR_ASSERT(grpc_mdelem_eq(m1, m2));
+  GPR_ASSERT(!grpc_mdelem_eq(m3, m1));
+  GPR_ASSERT(grpc_slice_eq(GRPC_MDKEY(m3), GRPC_MDKEY(m1)));
+  GPR_ASSERT(!grpc_slice_eq(GRPC_MDVALUE(m3), GRPC_MDVALUE(m1)));
+  GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(m1), "a") == 0);
+  GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m1), "b") == 0);
+  GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m3), "c") == 0);
+  GRPC_MDELEM_UNREF(&exec_ctx, m1);
+  GRPC_MDELEM_UNREF(&exec_ctx, m2);
+  GRPC_MDELEM_UNREF(&exec_ctx, m3);
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
-static void test_create_many_ephemeral_metadata(void) {
+static void test_create_many_ephemeral_metadata(bool intern_keys,
+                                                bool intern_values) {
   char buffer[GPR_LTOA_MIN_BUFSIZE];
   long i;
 
-  LOG_TEST("test_create_many_ephemeral_metadata");
+  gpr_log(
+      GPR_INFO,
+      "test_create_many_ephemeral_metadata: intern_keys=%d intern_values=%d",
+      intern_keys, intern_values);
 
   grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   /* add, and immediately delete a bunch of different elements */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    GRPC_MDELEM_UNREF(grpc_mdelem_from_strings("a", buffer));
+    GRPC_MDELEM_UNREF(
+        &exec_ctx,
+        grpc_mdelem_from_slices(
+            &exec_ctx,
+            maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+            maybe_intern(grpc_slice_from_copied_string(buffer),
+                         intern_values)));
   }
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
 static void test_create_many_persistant_metadata(void) {
   char buffer[GPR_LTOA_MIN_BUFSIZE];
   long i;
-  grpc_mdelem **created = gpr_malloc(sizeof(grpc_mdelem *) * MANY);
-  grpc_mdelem *md;
+  grpc_mdelem *created = gpr_malloc(sizeof(grpc_mdelem) * MANY);
+  grpc_mdelem md;
 
-  LOG_TEST("test_create_many_persistant_metadata");
+  gpr_log(GPR_INFO, "test_create_many_persistant_metadata");
 
   grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   /* add phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    created[i] = grpc_mdelem_from_strings("a", buffer);
+    created[i] = grpc_mdelem_from_slices(
+        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string(buffer)));
   }
   /* verify phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    md = grpc_mdelem_from_strings("a", buffer);
-    GPR_ASSERT(md == created[i]);
-    GRPC_MDELEM_UNREF(md);
+    md = grpc_mdelem_from_slices(
+        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string(buffer)));
+    GPR_ASSERT(grpc_mdelem_eq(md, created[i]));
+    GRPC_MDELEM_UNREF(&exec_ctx, md);
   }
   /* cleanup phase */
   for (i = 0; i < MANY; i++) {
-    GRPC_MDELEM_UNREF(created[i]);
+    GRPC_MDELEM_UNREF(&exec_ctx, created[i]);
   }
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 
   gpr_free(created);
 }
 
-static void test_spin_creating_the_same_thing(void) {
-  LOG_TEST("test_spin_creating_the_same_thing");
+static void test_spin_creating_the_same_thing(bool intern_keys,
+                                              bool intern_values) {
+  gpr_log(GPR_INFO,
+          "test_spin_creating_the_same_thing: intern_keys=%d intern_values=%d",
+          intern_keys, intern_values);
+
+  grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_mdelem a, b, c;
+  GRPC_MDELEM_UNREF(
+      &exec_ctx,
+      a = grpc_mdelem_from_slices(
+          &exec_ctx,
+          maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+          maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
+  GRPC_MDELEM_UNREF(
+      &exec_ctx,
+      b = grpc_mdelem_from_slices(
+          &exec_ctx,
+          maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+          maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
+  GRPC_MDELEM_UNREF(
+      &exec_ctx,
+      c = grpc_mdelem_from_slices(
+          &exec_ctx,
+          maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+          maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
+  if (intern_keys && intern_values) {
+    GPR_ASSERT(a.payload == b.payload);
+    GPR_ASSERT(a.payload == c.payload);
+  }
+  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_shutdown();
+}
+
+static void test_identity_laws(bool intern_keys, bool intern_values) {
+  gpr_log(GPR_INFO, "test_identity_laws: intern_keys=%d intern_values=%d",
+          intern_keys, intern_values);
 
   grpc_init();
-  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings("a", "b"));
-  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings("a", "b"));
-  GRPC_MDELEM_UNREF(grpc_mdelem_from_strings("a", "b"));
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_mdelem a, b, c;
+  a = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("b"), intern_values));
+  b = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("b"), intern_values));
+  c = grpc_mdelem_from_slices(
+      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("b"), intern_values));
+  GPR_ASSERT(grpc_mdelem_eq(a, a));
+  GPR_ASSERT(grpc_mdelem_eq(b, b));
+  GPR_ASSERT(grpc_mdelem_eq(c, c));
+  GPR_ASSERT(grpc_mdelem_eq(a, b));
+  GPR_ASSERT(grpc_mdelem_eq(b, c));
+  GPR_ASSERT(grpc_mdelem_eq(a, c));
+  GPR_ASSERT(grpc_mdelem_eq(b, a));
+  GPR_ASSERT(grpc_mdelem_eq(c, b));
+  GPR_ASSERT(grpc_mdelem_eq(c, a));
+  if (intern_keys && intern_values) {
+    GPR_ASSERT(a.payload == b.payload);
+    GPR_ASSERT(a.payload == c.payload);
+  } else {
+    GPR_ASSERT(a.payload != b.payload);
+    GPR_ASSERT(a.payload != c.payload);
+    GPR_ASSERT(b.payload != c.payload);
+  }
+  GRPC_MDELEM_UNREF(&exec_ctx, a);
+  GRPC_MDELEM_UNREF(&exec_ctx, b);
+  GRPC_MDELEM_UNREF(&exec_ctx, c);
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
@@ -157,24 +241,25 @@ static void test_things_stick_around(void) {
   size_t i, j;
   char *buffer;
   size_t nstrs = 1000;
-  grpc_mdstr **strs = gpr_malloc(sizeof(grpc_mdstr *) * nstrs);
+  grpc_slice *strs = gpr_malloc(sizeof(grpc_slice) * nstrs);
   size_t *shuf = gpr_malloc(sizeof(size_t) * nstrs);
-  grpc_mdstr *test;
+  grpc_slice test;
 
-  LOG_TEST("test_things_stick_around");
+  gpr_log(GPR_INFO, "test_things_stick_around");
 
   grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   for (i = 0; i < nstrs; i++) {
     gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x", i);
-    strs[i] = grpc_mdstr_from_string(buffer);
+    strs[i] = grpc_slice_intern(grpc_slice_from_static_string(buffer));
     shuf[i] = i;
     gpr_free(buffer);
   }
 
   for (i = 0; i < nstrs; i++) {
-    GRPC_MDSTR_REF(strs[i]);
-    GRPC_MDSTR_UNREF(strs[i]);
+    grpc_slice_ref_internal(strs[i]);
+    grpc_slice_unref_internal(&exec_ctx, strs[i]);
   }
 
   for (i = 0; i < nstrs; i++) {
@@ -186,143 +271,147 @@ static void test_things_stick_around(void) {
   }
 
   for (i = 0; i < nstrs; i++) {
-    GRPC_MDSTR_UNREF(strs[shuf[i]]);
+    grpc_slice_unref_internal(&exec_ctx, strs[shuf[i]]);
     for (j = i + 1; j < nstrs; j++) {
       gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x",
                    shuf[j]);
-      test = grpc_mdstr_from_string(buffer);
-      GPR_ASSERT(test == strs[shuf[j]]);
-      GRPC_MDSTR_UNREF(test);
+      test = grpc_slice_intern(grpc_slice_from_static_string(buffer));
+      GPR_ASSERT(grpc_slice_is_equivalent(test, strs[shuf[j]]));
+      grpc_slice_unref_internal(&exec_ctx, test);
       gpr_free(buffer);
     }
   }
 
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(strs);
   gpr_free(shuf);
 }
 
-static void test_slices_work(void) {
-  /* ensure no memory leaks when switching representation from mdstr to slice */
-  grpc_mdstr *str;
-  grpc_slice slice;
-
-  LOG_TEST("test_slices_work");
-
-  grpc_init();
-
-  str = grpc_mdstr_from_string(
-      "123456789012345678901234567890123456789012345678901234567890");
-  slice = grpc_slice_ref(str->slice);
-  GRPC_MDSTR_UNREF(str);
-  grpc_slice_unref(slice);
-
-  str = grpc_mdstr_from_string(
-      "123456789012345678901234567890123456789012345678901234567890");
-  slice = grpc_slice_ref(str->slice);
-  grpc_slice_unref(slice);
-  GRPC_MDSTR_UNREF(str);
-
-  grpc_shutdown();
-}
-
-static void test_base64_and_huffman_works(void) {
-  grpc_mdstr *str;
-  grpc_slice slice1;
-  grpc_slice slice2;
-
-  LOG_TEST("test_base64_and_huffman_works");
-
-  grpc_init();
-  str = grpc_mdstr_from_string("abcdefg");
-  slice1 = grpc_mdstr_as_base64_encoded_and_huffman_compressed(str);
-  slice2 = grpc_chttp2_base64_encode_and_huffman_compress(str->slice);
-  GPR_ASSERT(0 == grpc_slice_cmp(slice1, slice2));
-
-  grpc_slice_unref(slice2);
-  GRPC_MDSTR_UNREF(str);
-  grpc_shutdown();
-}
-
 static void test_user_data_works(void) {
   int *ud1;
   int *ud2;
-  grpc_mdelem *md;
-  LOG_TEST("test_user_data_works");
+  grpc_mdelem md;
+  gpr_log(GPR_INFO, "test_user_data_works");
 
   grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   ud1 = gpr_malloc(sizeof(int));
   *ud1 = 1;
   ud2 = gpr_malloc(sizeof(int));
   *ud2 = 2;
-  md = grpc_mdelem_from_strings("abc", "123");
+  md = grpc_mdelem_from_slices(
+      &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+      grpc_slice_intern(grpc_slice_from_static_string("123")));
   grpc_mdelem_set_user_data(md, gpr_free, ud1);
   grpc_mdelem_set_user_data(md, gpr_free, ud2);
   GPR_ASSERT(grpc_mdelem_get_user_data(md, gpr_free) == ud1);
-  GRPC_MDELEM_UNREF(md);
+  GRPC_MDELEM_UNREF(&exec_ctx, md);
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
-static void verify_ascii_header_size(const char *key, const char *value) {
-  grpc_mdelem *elem = grpc_mdelem_from_strings(key, value);
+static void verify_ascii_header_size(grpc_exec_ctx *exec_ctx, const char *key,
+                                     const char *value, bool intern_key,
+                                     bool intern_value) {
+  grpc_mdelem elem = grpc_mdelem_from_slices(
+      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_string(value), intern_value));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem);
   size_t expected_size = 32 + strlen(key) + strlen(value);
   GPR_ASSERT(expected_size == elem_size);
-  GRPC_MDELEM_UNREF(elem);
+  GRPC_MDELEM_UNREF(exec_ctx, elem);
 }
 
-static void verify_binary_header_size(const char *key, const uint8_t *value,
-                                      size_t value_len) {
-  grpc_mdelem *elem = grpc_mdelem_from_string_and_buffer(key, value, value_len);
-  GPR_ASSERT(grpc_is_binary_header(key, strlen(key)));
+static void verify_binary_header_size(grpc_exec_ctx *exec_ctx, const char *key,
+                                      const uint8_t *value, size_t value_len,
+                                      bool intern_key, bool intern_value) {
+  grpc_mdelem elem = grpc_mdelem_from_slices(
+      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_buffer(value, value_len),
+                   intern_value));
+  GPR_ASSERT(grpc_is_binary_header(GRPC_MDKEY(elem)));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem);
   grpc_slice value_slice =
       grpc_slice_from_copied_buffer((const char *)value, value_len);
   grpc_slice base64_encoded = grpc_chttp2_base64_encode(value_slice);
   size_t expected_size = 32 + strlen(key) + GRPC_SLICE_LENGTH(base64_encoded);
   GPR_ASSERT(expected_size == elem_size);
-  grpc_slice_unref(value_slice);
-  grpc_slice_unref(base64_encoded);
-  GRPC_MDELEM_UNREF(elem);
+  grpc_slice_unref_internal(exec_ctx, value_slice);
+  grpc_slice_unref_internal(exec_ctx, base64_encoded);
+  GRPC_MDELEM_UNREF(exec_ctx, elem);
 }
 
 #define BUFFER_SIZE 64
-static void test_mdelem_sizes_in_hpack(void) {
-  LOG_TEST("test_mdelem_size");
+static void test_mdelem_sizes_in_hpack(bool intern_key, bool intern_value) {
+  gpr_log(GPR_INFO, "test_mdelem_size: intern_key=%d intern_value=%d",
+          intern_key, intern_value);
   grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   uint8_t binary_value[BUFFER_SIZE] = {0};
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
     binary_value[i] = i;
   }
 
-  verify_ascii_header_size("hello", "world");
-  verify_ascii_header_size("hello", "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
-  verify_ascii_header_size(":scheme", "http");
+  verify_ascii_header_size(&exec_ctx, "hello", "world", intern_key,
+                           intern_value);
+  verify_ascii_header_size(&exec_ctx, "hello",
+                           "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", intern_key,
+                           intern_value);
+  verify_ascii_header_size(&exec_ctx, ":scheme", "http", intern_key,
+                           intern_value);
 
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
-    verify_binary_header_size("hello-bin", binary_value, i);
+    verify_binary_header_size(&exec_ctx, "hello-bin", binary_value, i,
+                              intern_key, intern_value);
   }
 
-  const char *static_metadata = grpc_static_metadata_strings[0];
-  memcpy(binary_value, static_metadata, strlen(static_metadata));
-  verify_binary_header_size("hello-bin", binary_value, strlen(static_metadata));
+  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_shutdown();
+}
 
+static void test_copied_static_metadata(bool dup_key, bool dup_value) {
+  gpr_log(GPR_INFO, "test_static_metadata: dup_key=%d dup_value=%d", dup_key,
+          dup_value);
+  grpc_init();
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+  for (size_t i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) {
+    grpc_mdelem p = GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[i],
+                                     GRPC_MDELEM_STORAGE_STATIC);
+    grpc_mdelem q =
+        grpc_mdelem_from_slices(&exec_ctx, maybe_dup(GRPC_MDKEY(p), dup_key),
+                                maybe_dup(GRPC_MDVALUE(p), dup_value));
+    GPR_ASSERT(grpc_mdelem_eq(p, q));
+    if (dup_key || dup_value) {
+      GPR_ASSERT(p.payload != q.payload);
+    } else {
+      GPR_ASSERT(p.payload == q.payload);
+    }
+    GRPC_MDELEM_UNREF(&exec_ctx, p);
+    GRPC_MDELEM_UNREF(&exec_ctx, q);
+  }
+
+  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   test_no_op();
-  test_create_string();
-  test_create_metadata();
-  test_create_many_ephemeral_metadata();
+  for (int k = 0; k <= 1; k++) {
+    for (int v = 0; v <= 1; v++) {
+      test_create_metadata(k, v);
+      test_create_many_ephemeral_metadata(k, v);
+      test_identity_laws(k, v);
+      test_spin_creating_the_same_thing(k, v);
+      test_mdelem_sizes_in_hpack(k, v);
+      test_copied_static_metadata(k, v);
+    }
+  }
   test_create_many_persistant_metadata();
-  test_spin_creating_the_same_thing();
   test_things_stick_around();
-  test_slices_work();
-  test_base64_and_huffman_works();
   test_user_data_works();
-  test_mdelem_sizes_in_hpack();
   return 0;
 }
diff --git a/test/core/transport/pid_controller_test.c b/test/core/transport/pid_controller_test.c
index 9614983b00..831343c815 100644
--- a/test/core/transport/pid_controller_test.c
+++ b/test/core/transport/pid_controller_test.c
@@ -33,6 +33,7 @@
 
 #include "src/core/lib/transport/pid_controller.h"
 
+#include <float.h>
 #include <math.h>
 
 #include <grpc/support/alloc.h>
@@ -45,7 +46,14 @@
 static void test_noop(void) {
   gpr_log(GPR_INFO, "test_noop");
   grpc_pid_controller pid;
-  grpc_pid_controller_init(&pid, 1, 1, 1);
+  grpc_pid_controller_init(
+      &pid, (grpc_pid_controller_args){.gain_p = 1,
+                                       .gain_i = 1,
+                                       .gain_d = 1,
+                                       .initial_control_value = 1,
+                                       .min_control_value = DBL_MIN,
+                                       .max_control_value = DBL_MAX,
+                                       .integral_range = DBL_MAX});
 }
 
 static void test_simple_convergence(double gain_p, double gain_i, double gain_d,
@@ -55,16 +63,24 @@ static void test_simple_convergence(double gain_p, double gain_i, double gain_d,
           "start=%lf",
           gain_p, gain_i, gain_d, dt, set_point, start);
   grpc_pid_controller pid;
-  grpc_pid_controller_init(&pid, 0.2, 0.1, 0.1);
+  grpc_pid_controller_init(
+      &pid, (grpc_pid_controller_args){.gain_p = gain_p,
+                                       .gain_i = gain_i,
+                                       .gain_d = gain_d,
+                                       .initial_control_value = start,
+                                       .min_control_value = DBL_MIN,
+                                       .max_control_value = DBL_MAX,
+                                       .integral_range = DBL_MAX});
 
-  double current = start;
-
-  for (int i = 0; i < 1000; i++) {
-    current += grpc_pid_controller_update(&pid, set_point - current, 1);
+  for (int i = 0; i < 100000; i++) {
+    grpc_pid_controller_update(&pid, set_point - grpc_pid_controller_last(&pid),
+                               1);
   }
 
-  GPR_ASSERT(fabs(set_point - current) < 0.1);
-  GPR_ASSERT(fabs(pid.error_integral) < 0.1);
+  GPR_ASSERT(fabs(set_point - grpc_pid_controller_last(&pid)) < 0.1);
+  if (gain_i > 0) {
+    GPR_ASSERT(fabs(pid.error_integral) < 0.1);
+  }
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/transport/chttp2/status_conversion_test.c b/test/core/transport/status_conversion_test.c
index f5a5cd1395..65f840b1e2 100644
--- a/test/core/transport/chttp2/status_conversion_test.c
+++ b/test/core/transport/status_conversion_test.c
@@ -31,50 +31,50 @@
  *
  */
 
-#include "src/core/ext/transport/chttp2/transport/status_conversion.h"
+#include "src/core/lib/transport/status_conversion.h"
 #include <grpc/support/log.h>
 #include "test/core/util/test_config.h"
 
 #define GRPC_STATUS_TO_HTTP2_ERROR(a, b) \
-  GPR_ASSERT(grpc_chttp2_grpc_status_to_http2_error(a) == (b))
+  GPR_ASSERT(grpc_status_to_http2_error(a) == (b))
 #define HTTP2_ERROR_TO_GRPC_STATUS(a, deadline, b) \
-  GPR_ASSERT(grpc_chttp2_http2_error_to_grpc_status(a, deadline) == (b))
+  GPR_ASSERT(grpc_http2_error_to_grpc_status(a, deadline) == (b))
 #define GRPC_STATUS_TO_HTTP2_STATUS(a, b) \
-  GPR_ASSERT(grpc_chttp2_grpc_status_to_http2_status(a) == (b))
+  GPR_ASSERT(grpc_status_to_http2_status(a) == (b))
 #define HTTP2_STATUS_TO_GRPC_STATUS(a, b) \
-  GPR_ASSERT(grpc_chttp2_http2_status_to_grpc_status(a) == (b))
+  GPR_ASSERT(grpc_http2_status_to_grpc_status(a) == (b))
 
 int main(int argc, char **argv) {
   int i;
 
   grpc_test_init(argc, argv);
 
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_OK, GRPC_CHTTP2_NO_ERROR);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_CANCELLED, GRPC_CHTTP2_CANCEL);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_UNKNOWN, GRPC_CHTTP2_INTERNAL_ERROR);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_OK, GRPC_HTTP2_NO_ERROR);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_CANCELLED, GRPC_HTTP2_CANCEL);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_UNKNOWN, GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_INVALID_ARGUMENT,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_DEADLINE_EXCEEDED, GRPC_CHTTP2_CANCEL);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_NOT_FOUND, GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_DEADLINE_EXCEEDED, GRPC_HTTP2_CANCEL);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_NOT_FOUND, GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_ALREADY_EXISTS,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_PERMISSION_DENIED,
-                             GRPC_CHTTP2_INADEQUATE_SECURITY);
+                             GRPC_HTTP2_INADEQUATE_SECURITY);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_UNAUTHENTICATED,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_RESOURCE_EXHAUSTED,
-                             GRPC_CHTTP2_ENHANCE_YOUR_CALM);
+                             GRPC_HTTP2_ENHANCE_YOUR_CALM);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_FAILED_PRECONDITION,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_ABORTED, GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_ABORTED, GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_OUT_OF_RANGE,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_UNIMPLEMENTED,
-                             GRPC_CHTTP2_INTERNAL_ERROR);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_INTERNAL, GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_INTERNAL_ERROR);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_INTERNAL, GRPC_HTTP2_INTERNAL_ERROR);
   GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_UNAVAILABLE,
-                             GRPC_CHTTP2_REFUSED_STREAM);
-  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_DATA_LOSS, GRPC_CHTTP2_INTERNAL_ERROR);
+                             GRPC_HTTP2_REFUSED_STREAM);
+  GRPC_STATUS_TO_HTTP2_ERROR(GRPC_STATUS_DATA_LOSS, GRPC_HTTP2_INTERNAL_ERROR);
 
   GRPC_STATUS_TO_HTTP2_STATUS(GRPC_STATUS_OK, 200);
   GRPC_STATUS_TO_HTTP2_STATUS(GRPC_STATUS_CANCELLED, 200);
@@ -95,59 +95,59 @@ int main(int argc, char **argv) {
   GRPC_STATUS_TO_HTTP2_STATUS(GRPC_STATUS_DATA_LOSS, 200);
 
   const gpr_timespec before_deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_NO_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_NO_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_PROTOCOL_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_PROTOCOL_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_INTERNAL_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_INTERNAL_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_FLOW_CONTROL_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_FLOW_CONTROL_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_SETTINGS_TIMEOUT, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_SETTINGS_TIMEOUT, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_STREAM_CLOSED, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_STREAM_CLOSED, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_FRAME_SIZE_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_FRAME_SIZE_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_REFUSED_STREAM, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_REFUSED_STREAM, before_deadline,
                              GRPC_STATUS_UNAVAILABLE);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_CANCEL, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_CANCEL, before_deadline,
                              GRPC_STATUS_CANCELLED);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_COMPRESSION_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_COMPRESSION_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_CONNECT_ERROR, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_CONNECT_ERROR, before_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_ENHANCE_YOUR_CALM, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_ENHANCE_YOUR_CALM, before_deadline,
                              GRPC_STATUS_RESOURCE_EXHAUSTED);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_INADEQUATE_SECURITY, before_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_INADEQUATE_SECURITY, before_deadline,
                              GRPC_STATUS_PERMISSION_DENIED);
 
   const gpr_timespec after_deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_NO_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_NO_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_PROTOCOL_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_PROTOCOL_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_INTERNAL_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_INTERNAL_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_FLOW_CONTROL_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_FLOW_CONTROL_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_SETTINGS_TIMEOUT, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_SETTINGS_TIMEOUT, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_STREAM_CLOSED, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_STREAM_CLOSED, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_FRAME_SIZE_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_FRAME_SIZE_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_REFUSED_STREAM, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_REFUSED_STREAM, after_deadline,
                              GRPC_STATUS_UNAVAILABLE);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_CANCEL, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_CANCEL, after_deadline,
                              GRPC_STATUS_DEADLINE_EXCEEDED);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_COMPRESSION_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_COMPRESSION_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_CONNECT_ERROR, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_CONNECT_ERROR, after_deadline,
                              GRPC_STATUS_INTERNAL);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_ENHANCE_YOUR_CALM, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_ENHANCE_YOUR_CALM, after_deadline,
                              GRPC_STATUS_RESOURCE_EXHAUSTED);
-  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_CHTTP2_INADEQUATE_SECURITY, after_deadline,
+  HTTP2_ERROR_TO_GRPC_STATUS(GRPC_HTTP2_INADEQUATE_SECURITY, after_deadline,
                              GRPC_STATUS_PERMISSION_DENIED);
 
   HTTP2_STATUS_TO_GRPC_STATUS(200, GRPC_STATUS_OK);
@@ -165,7 +165,7 @@ int main(int argc, char **argv) {
 
   /* check all status values can be converted */
   for (i = 0; i <= 999; i++) {
-    grpc_chttp2_http2_status_to_grpc_status(i);
+    grpc_http2_status_to_grpc_status(i);
   }
 
   return 0;
diff --git a/test/core/transport/timeout_encoding_test.c b/test/core/transport/timeout_encoding_test.c
index b6004af7b4..10e1804995 100644
--- a/test/core/transport/timeout_encoding_test.c
+++ b/test/core/transport/timeout_encoding_test.c
@@ -88,7 +88,8 @@ void test_encoding(void) {
 static void assert_decodes_as(const char *buffer, gpr_timespec expected) {
   gpr_timespec got;
   gpr_log(GPR_INFO, "check decoding '%s'", buffer);
-  GPR_ASSERT(1 == grpc_http2_decode_timeout(buffer, &got));
+  GPR_ASSERT(1 == grpc_http2_decode_timeout(
+                      grpc_slice_from_static_string(buffer), &got));
   GPR_ASSERT(0 == gpr_time_cmp(got, expected));
 }
 
@@ -134,18 +135,23 @@ void test_decoding(void) {
   assert_decodes_as("9999999999S", gpr_inf_future(GPR_TIMESPAN));
 }
 
-void test_decoding_fails(void) {
+static void assert_decoding_fails(const char *s) {
   gpr_timespec x;
+  GPR_ASSERT(0 ==
+             grpc_http2_decode_timeout(grpc_slice_from_static_string(s), &x));
+}
+
+void test_decoding_fails(void) {
   LOG_TEST("test_decoding_fails");
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout(" ", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("x", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("1", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("1x", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("1ux", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("!", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("n1", &x));
-  GPR_ASSERT(0 == grpc_http2_decode_timeout("-1u", &x));
+  assert_decoding_fails("");
+  assert_decoding_fails(" ");
+  assert_decoding_fails("x");
+  assert_decoding_fails("1");
+  assert_decoding_fails("1x");
+  assert_decoding_fails("1ux");
+  assert_decoding_fails("!");
+  assert_decoding_fails("n1");
+  assert_decoding_fails("-1u");
 }
 
 int main(int argc, char **argv) {
diff --git a/test/core/util/BUILD b/test/core/util/BUILD
new file mode 100644
index 0000000000..5c90f1db44
--- /dev/null
+++ b/test/core/util/BUILD
@@ -0,0 +1,89 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+licenses(["notice"])  # 3-clause BSD
+
+cc_library(
+    name = "gpr_test_util",
+    srcs = [
+        "test_config.c",
+        "memory_counters.c",
+    ],
+    hdrs = [
+        "test_config.h",
+        "memory_counters.h",
+    ],
+    deps = ["//:gpr"],
+    visibility = ["//:__subpackages__"],
+)
+
+cc_library(
+    name = "grpc_test_util",
+    srcs = [
+        "debugger_macros.c",
+        "grpc_profiler.c",
+        "mock_endpoint.c",
+        "parse_hexstring.c",
+        "passthru_endpoint.c",
+        "port_posix.c",
+        "port_server_client.c",
+        "port_windows.c",
+        "reconnect_server.c",
+        "slice_splitter.c",
+        "test_tcp_server.c",
+    ],
+    hdrs = [
+        "debugger_macros.h",
+        "grpc_profiler.h",
+        "mock_endpoint.h",
+        "parse_hexstring.h",
+        "passthru_endpoint.h",
+        "port.h",
+        "port_server_client.h",
+        "reconnect_server.h",
+        "slice_splitter.h",
+        "test_tcp_server.h",
+    ],
+    deps = [":gpr_test_util", "//:grpc"],
+    visibility = ["//test:__subpackages__"],
+    copts = ["-std=c99"],
+)
+
+cc_library(
+  name = "one_corpus_entry_fuzzer",
+  srcs = ["one_corpus_entry_fuzzer.c"],
+  deps = [":gpr_test_util", "//:grpc"],
+  visibility = ["//test:__subpackages__"],
+)
+
+sh_library(
+  name = "fuzzer_one_entry_runner",
+  srcs = ["fuzzer_one_entry_runner.sh"],
+  visibility = ["//test:__subpackages__"],
+)
diff --git a/test/core/util/debugger_macros.c b/test/core/util/debugger_macros.c
new file mode 100644
index 0000000000..de6a2f38a7
--- /dev/null
+++ b/test/core/util/debugger_macros.c
@@ -0,0 +1,71 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * A collection of 'macros' that help navigating the grpc object hierarchy
+ * Not intended to be robust for main-line code, often cuts across abstraction
+ * boundaries.
+ */
+
+#include <stdio.h>
+
+#include "src/core/ext/client_channel/client_channel.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
+#include "src/core/lib/channel/connected_channel.h"
+#include "src/core/lib/surface/call.h"
+
+void grpc_summon_debugger_macros() {}
+
+grpc_stream *grpc_transport_stream_from_call(grpc_call *call) {
+  grpc_call_stack *cs = grpc_call_get_call_stack(call);
+  for (;;) {
+    grpc_call_element *el = grpc_call_stack_element(cs, cs->count - 1);
+    if (el->filter == &grpc_client_channel_filter) {
+      grpc_subchannel_call *scc = grpc_client_channel_get_subchannel_call(el);
+      if (scc == NULL) {
+        fprintf(stderr, "No subchannel-call");
+        return NULL;
+      }
+      cs = grpc_subchannel_call_get_call_stack(scc);
+    } else if (el->filter == &grpc_connected_filter) {
+      return grpc_connected_channel_get_stream(el);
+    } else {
+      fprintf(stderr, "Unrecognized filter: %s", el->filter->name);
+      return NULL;
+    }
+  }
+}
+
+grpc_chttp2_stream *grpc_chttp2_stream_from_call(grpc_call *call) {
+  return (grpc_chttp2_stream *)grpc_transport_stream_from_call(call);
+}
diff --git a/test/cpp/qps/limit_cores.h b/test/core/util/debugger_macros.h
index 5482904a3c..6369ca6c97 100644
--- a/test/cpp/qps/limit_cores.h
+++ b/test/core/util/debugger_macros.h
@@ -31,19 +31,9 @@
  *
  */
 
-#ifndef TEST_QPS_LIMIT_CORES_H
-#define TEST_QPS_LIMIT_CORES_H
+#ifndef GRPC_TEST_CORE_UTIL_DEBUGGER_MACROS_H
+#define GRPC_TEST_CORE_UTIL_DEBUGGER_MACROS_H
 
-namespace grpc {
-namespace testing {
-/// LimitCores: allow this worker to only run on the cores specified in the
-/// array \a cores, which is of length \a cores_size.
-///
-/// LimitCores takes array and size arguments (instead of vector) for direct
-/// conversion from repeated field of protobuf. Use a cores_size of 0 to remove
-/// existing limits (from an empty repeated field)
-int LimitCores(const int *cores, int cores_size);
-}  // namespace testing
-}  // namespace grpc
+void grpc_summon_debugger_macros();
 
-#endif  // TEST_QPS_LIMIT_CORES_H
+#endif /* GRPC_TEST_CORE_UTIL_DEBUGGER_MACROS_H */
diff --git a/test/core/util/fuzzer_one_entry_runner.sh b/test/core/util/fuzzer_one_entry_runner.sh
new file mode 100755
index 0000000000..a0558a9c09
--- /dev/null
+++ b/test/core/util/fuzzer_one_entry_runner.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# Test runner for fuzzer tests from bazel
+
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+$1 $2
diff --git a/test/core/util/grpc_fuzzer.bzl b/test/core/util/grpc_fuzzer.bzl
new file mode 100644
index 0000000000..2f552a9fdb
--- /dev/null
+++ b/test/core/util/grpc_fuzzer.bzl
@@ -0,0 +1,43 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+def grpc_fuzzer(name, corpus, srcs = [], deps = [], **kwargs):
+  native.cc_binary(
+    name = '%s/one_entry.bin' % name,
+    srcs = srcs,
+    deps = deps + ["//test/core/util:one_corpus_entry_fuzzer"],
+    **kwargs
+  )
+  for entry in native.glob(['%s/*' % corpus]):
+    native.sh_test(
+      name = '%s/one_entry/%s' % (name, entry),
+      data = [':%s/one_entry.bin' % name, entry],
+      srcs = ['//test/core/util:fuzzer_one_entry_runner'],
+      args = ['$(location :%s/one_entry.bin)' % name, '$(location %s)' % entry]
+    )
diff --git a/test/core/util/memory_counters.h b/test/core/util/memory_counters.h
index f332816501..b9b2b3adda 100644
--- a/test/core/util/memory_counters.h
+++ b/test/core/util/memory_counters.h
@@ -34,6 +34,8 @@
 #ifndef GRPC_TEST_CORE_UTIL_MEMORY_COUNTERS_H
 #define GRPC_TEST_CORE_UTIL_MEMORY_COUNTERS_H
 
+#include <stddef.h>
+
 struct grpc_memory_counters {
   size_t total_size_relative;
   size_t total_size_absolute;
diff --git a/test/core/util/mock_endpoint.c b/test/core/util/mock_endpoint.c
index bf6d85252a..d531ec6031 100644
--- a/test/core/util/mock_endpoint.c
+++ b/test/core/util/mock_endpoint.c
@@ -55,7 +55,7 @@ static void me_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   gpr_mu_lock(&m->mu);
   if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    grpc_exec_ctx_sched(exec_ctx, cb, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -69,7 +69,7 @@ static void me_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   for (size_t i = 0; i < slices->count; i++) {
     m->on_write(slices->slices[i]);
   }
-  grpc_exec_ctx_sched(exec_ctx, cb, GRPC_ERROR_NONE, NULL);
+  grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_NONE);
 }
 
 static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
@@ -78,16 +78,18 @@ static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 static void me_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
                                   grpc_pollset_set *pollset) {}
 
-static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+                        grpc_error *why) {
   grpc_mock_endpoint *m = (grpc_mock_endpoint *)ep;
   gpr_mu_lock(&m->mu);
   if (m->on_read) {
-    grpc_exec_ctx_sched(exec_ctx, m->on_read,
-                        GRPC_ERROR_CREATE("Endpoint Shutdown"), NULL);
+    grpc_closure_sched(exec_ctx, m->on_read, GRPC_ERROR_CREATE_REFERENCING(
+                                                 "Endpoint Shutdown", &why, 1));
     m->on_read = NULL;
   }
   gpr_mu_unlock(&m->mu);
   grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  GRPC_ERROR_UNREF(why);
 }
 
 static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
@@ -144,7 +146,7 @@ void grpc_mock_endpoint_put_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   gpr_mu_lock(&m->mu);
   if (m->on_read != NULL) {
     grpc_slice_buffer_add(m->on_read_out, slice);
-    grpc_exec_ctx_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE);
     m->on_read = NULL;
   } else {
     grpc_slice_buffer_add(&m->read_buffer, slice);
diff --git a/test/core/util/passthru_endpoint.c b/test/core/util/passthru_endpoint.c
index b3405f02e9..1e82c737c6 100644
--- a/test/core/util/passthru_endpoint.c
+++ b/test/core/util/passthru_endpoint.c
@@ -34,11 +34,14 @@
 #include "test/core/util/passthru_endpoint.h"
 
 #include <inttypes.h>
+#include <string.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 #include "src/core/lib/iomgr/sockaddr.h"
 
+#include "src/core/lib/slice/slice_internal.h"
+
 typedef struct passthru_endpoint passthru_endpoint;
 
 typedef struct {
@@ -53,6 +56,9 @@ typedef struct {
 struct passthru_endpoint {
   gpr_mu mu;
   int halves;
+  grpc_passthru_endpoint_stats *stats;
+  grpc_passthru_endpoint_stats
+      dummy_stats;  // used if constructor stats == NULL
   bool shutdown;
   half client;
   half server;
@@ -63,11 +69,10 @@ static void me_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   half *m = (half *)ep;
   gpr_mu_lock(&m->parent->mu);
   if (m->parent->shutdown) {
-    grpc_exec_ctx_sched(exec_ctx, cb, GRPC_ERROR_CREATE("Already shutdown"),
-                        NULL);
+    grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_CREATE("Already shutdown"));
   } else if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    grpc_exec_ctx_sched(exec_ctx, cb, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -85,13 +90,14 @@ static void me_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   half *m = other_half((half *)ep);
   gpr_mu_lock(&m->parent->mu);
   grpc_error *error = GRPC_ERROR_NONE;
+  m->parent->stats->num_writes++;
   if (m->parent->shutdown) {
     error = GRPC_ERROR_CREATE("Endpoint already shutdown");
   } else if (m->on_read != NULL) {
     for (size_t i = 0; i < slices->count; i++) {
       grpc_slice_buffer_add(m->on_read_out, grpc_slice_ref(slices->slices[i]));
     }
-    grpc_exec_ctx_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE, NULL);
+    grpc_closure_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE);
     m->on_read = NULL;
   } else {
     for (size_t i = 0; i < slices->count; i++) {
@@ -99,7 +105,7 @@ static void me_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
     }
   }
   gpr_mu_unlock(&m->parent->mu);
-  grpc_exec_ctx_sched(exec_ctx, cb, error, NULL);
+  grpc_closure_sched(exec_ctx, cb, error);
 }
 
 static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
@@ -108,23 +114,25 @@ static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
 static void me_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
                                   grpc_pollset_set *pollset) {}
 
-static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
+                        grpc_error *why) {
   half *m = (half *)ep;
   gpr_mu_lock(&m->parent->mu);
   m->parent->shutdown = true;
   if (m->on_read) {
-    grpc_exec_ctx_sched(exec_ctx, m->on_read, GRPC_ERROR_CREATE("Shutdown"),
-                        NULL);
+    grpc_closure_sched(exec_ctx, m->on_read,
+                       GRPC_ERROR_CREATE_REFERENCING("Shutdown", &why, 1));
     m->on_read = NULL;
   }
   m = other_half(m);
   if (m->on_read) {
-    grpc_exec_ctx_sched(exec_ctx, m->on_read, GRPC_ERROR_CREATE("Shutdown"),
-                        NULL);
+    grpc_closure_sched(exec_ctx, m->on_read,
+                       GRPC_ERROR_CREATE_REFERENCING("Shutdown", &why, 1));
     m->on_read = NULL;
   }
   gpr_mu_unlock(&m->parent->mu);
   grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  GRPC_ERROR_UNREF(why);
 }
 
 static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
@@ -133,8 +141,8 @@ static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
   if (0 == --p->halves) {
     gpr_mu_unlock(&p->mu);
     gpr_mu_destroy(&p->mu);
-    grpc_slice_buffer_destroy(&p->client.read_buffer);
-    grpc_slice_buffer_destroy(&p->server.read_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &p->client.read_buffer);
+    grpc_slice_buffer_destroy_internal(exec_ctx, &p->server.read_buffer);
     grpc_resource_user_unref(exec_ctx, p->client.resource_user);
     grpc_resource_user_unref(exec_ctx, p->server.resource_user);
     gpr_free(p);
@@ -144,7 +152,9 @@ static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
 }
 
 static char *me_get_peer(grpc_endpoint *ep) {
-  return gpr_strdup("fake:mock_endpoint");
+  passthru_endpoint *p = ((half *)ep)->parent;
+  return ((half *)ep) == &p->client ? gpr_strdup("fake:mock_client_endpoint")
+                                    : gpr_strdup("fake:mock_server_endpoint");
 }
 
 static int me_get_fd(grpc_endpoint *ep) { return -1; }
@@ -185,10 +195,13 @@ static void half_init(half *m, passthru_endpoint *parent,
 
 void grpc_passthru_endpoint_create(grpc_endpoint **client,
                                    grpc_endpoint **server,
-                                   grpc_resource_quota *resource_quota) {
+                                   grpc_resource_quota *resource_quota,
+                                   grpc_passthru_endpoint_stats *stats) {
   passthru_endpoint *m = gpr_malloc(sizeof(*m));
   m->halves = 2;
   m->shutdown = 0;
+  m->stats = stats == NULL ? &m->dummy_stats : stats;
+  memset(m->stats, 0, sizeof(*m->stats));
   half_init(&m->client, m, resource_quota, "client");
   half_init(&m->server, m, resource_quota, "server");
   gpr_mu_init(&m->mu);
diff --git a/test/core/util/passthru_endpoint.h b/test/core/util/passthru_endpoint.h
index b81ac5571c..9199925aa0 100644
--- a/test/core/util/passthru_endpoint.h
+++ b/test/core/util/passthru_endpoint.h
@@ -36,8 +36,11 @@
 
 #include "src/core/lib/iomgr/endpoint.h"
 
+typedef struct { int num_writes; } grpc_passthru_endpoint_stats;
+
 void grpc_passthru_endpoint_create(grpc_endpoint **client,
                                    grpc_endpoint **server,
-                                   grpc_resource_quota *resource_quota);
+                                   grpc_resource_quota *resource_quota,
+                                   grpc_passthru_endpoint_stats *stats);
 
 #endif
diff --git a/test/core/util/port_server_client.c b/test/core/util/port_server_client.c
index b2342feeb4..6d722ffc88 100644
--- a/test/core/util/port_server_client.c
+++ b/test/core/util/port_server_client.c
@@ -92,7 +92,8 @@ void grpc_free_port_using_server(char *server, int port) {
   grpc_pollset *pollset = gpr_malloc(grpc_pollset_size());
   grpc_pollset_init(pollset, &pr.mu);
   pr.pops = grpc_polling_entity_create_from_pollset(pollset);
-  shutdown_closure = grpc_closure_create(destroy_pops_and_shutdown, &pr.pops);
+  shutdown_closure = grpc_closure_create(destroy_pops_and_shutdown, &pr.pops,
+                                         grpc_schedule_on_exec_ctx);
 
   req.host = server;
   gpr_asprintf(&path, "/drop/%d", port);
@@ -102,9 +103,11 @@ void grpc_free_port_using_server(char *server, int port) {
   grpc_resource_quota *resource_quota =
       grpc_resource_quota_create("port_server_client/free");
   grpc_httpcli_get(&exec_ctx, &context, &pr.pops, resource_quota, &req,
-                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10),
-                   grpc_closure_create(freed_port_from_server, &pr), &rsp);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+                   grpc_timeout_seconds_to_deadline(10),
+                   grpc_closure_create(freed_port_from_server, &pr,
+                                       grpc_schedule_on_exec_ctx),
+                   &rsp);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   gpr_mu_lock(pr.mu);
   while (!pr.done) {
     grpc_pollset_worker *worker = NULL;
@@ -112,7 +115,7 @@ void grpc_free_port_using_server(char *server, int port) {
             "pollset_work",
             grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
                               &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                              GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1)))) {
+                              grpc_timeout_seconds_to_deadline(1)))) {
       pr.done = 1;
     }
   }
@@ -149,7 +152,7 @@ static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
     failed = 1;
     const char *msg = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "failed port pick from server: retrying [%s]", msg);
-    grpc_error_free_string(msg);
+
   } else if (response->status != 200) {
     failed = 1;
     gpr_log(GPR_DEBUG, "failed port pick from server: status=%d",
@@ -173,10 +176,11 @@ static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
     grpc_resource_quota *resource_quota =
         grpc_resource_quota_create("port_server_client/pick_retry");
     grpc_httpcli_get(exec_ctx, pr->ctx, &pr->pops, resource_quota, &req,
-                     GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10),
-                     grpc_closure_create(got_port_from_server, pr),
+                     grpc_timeout_seconds_to_deadline(10),
+                     grpc_closure_create(got_port_from_server, pr,
+                                         grpc_schedule_on_exec_ctx),
                      &pr->response);
-    grpc_resource_quota_internal_unref(exec_ctx, resource_quota);
+    grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
     return;
   }
   GPR_ASSERT(response);
@@ -208,7 +212,8 @@ int grpc_pick_port_using_server(char *server) {
   grpc_pollset *pollset = gpr_malloc(grpc_pollset_size());
   grpc_pollset_init(pollset, &pr.mu);
   pr.pops = grpc_polling_entity_create_from_pollset(pollset);
-  shutdown_closure = grpc_closure_create(destroy_pops_and_shutdown, &pr.pops);
+  shutdown_closure = grpc_closure_create(destroy_pops_and_shutdown, &pr.pops,
+                                         grpc_schedule_on_exec_ctx);
   pr.port = -1;
   pr.server = server;
   pr.ctx = &context;
@@ -219,11 +224,12 @@ int grpc_pick_port_using_server(char *server) {
   grpc_httpcli_context_init(&context);
   grpc_resource_quota *resource_quota =
       grpc_resource_quota_create("port_server_client/pick");
-  grpc_httpcli_get(&exec_ctx, &context, &pr.pops, resource_quota, &req,
-                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10),
-                   grpc_closure_create(got_port_from_server, &pr),
-                   &pr.response);
-  grpc_resource_quota_internal_unref(&exec_ctx, resource_quota);
+  grpc_httpcli_get(
+      &exec_ctx, &context, &pr.pops, resource_quota, &req,
+      grpc_timeout_seconds_to_deadline(10),
+      grpc_closure_create(got_port_from_server, &pr, grpc_schedule_on_exec_ctx),
+      &pr.response);
+  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
   grpc_exec_ctx_finish(&exec_ctx);
   gpr_mu_lock(pr.mu);
   while (pr.port == -1) {
@@ -232,7 +238,7 @@ int grpc_pick_port_using_server(char *server) {
             "pollset_work",
             grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
                               &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                              GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1)))) {
+                              grpc_timeout_seconds_to_deadline(1)))) {
       pr.port = 0;
     }
   }
diff --git a/test/core/util/reconnect_server.c b/test/core/util/reconnect_server.c
index 7bf83a74a1..7fbd0ca6aa 100644
--- a/test/core/util/reconnect_server.c
+++ b/test/core/util/reconnect_server.c
@@ -80,7 +80,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
   timestamp_list *new_tail;
   peer = grpc_endpoint_get_peer(tcp);
-  grpc_endpoint_shutdown(exec_ctx, tcp);
+  grpc_endpoint_shutdown(exec_ctx, tcp, GRPC_ERROR_CREATE("Connected"));
   grpc_endpoint_destroy(exec_ctx, tcp);
   if (peer) {
     last_colon = strrchr(peer, ':');
diff --git a/test/core/util/test_config.c b/test/core/util/test_config.c
index d86ed94637..94aab27253 100644
--- a/test/core/util/test_config.c
+++ b/test/core/util/test_config.c
@@ -45,8 +45,8 @@
 #include "src/core/lib/support/env.h"
 #include "src/core/lib/support/string.h"
 
-double g_fixture_slowdown_factor = 1.0;
-double g_poller_slowdown_factor = 1.0;
+int64_t g_fixture_slowdown_factor = 1;
+int64_t g_poller_slowdown_factor = 1;
 
 #if GPR_GETPID_IN_UNISTD_H
 #include <unistd.h>
@@ -278,19 +278,109 @@ static void install_crash_handler() {
 static void install_crash_handler() {}
 #endif
 
+bool BuiltUnderValgrind() {
+#ifdef RUNNING_ON_VALGRIND
+  return true;
+#else
+  return false;
+#endif
+}
+
+bool BuiltUnderTsan() {
+#if defined(__has_feature)
+#if __has_feature(thread_sanitizer)
+  return true;
+#else
+  return false;
+#endif
+#else
+#ifdef THREAD_SANITIZER
+  return true;
+#else
+  return false;
+#endif
+#endif
+}
+
+bool BuiltUnderAsan() {
+#if defined(__has_feature)
+#if __has_feature(address_sanitizer)
+  return true;
+#else
+  return false;
+#endif
+#else
+#ifdef ADDRESS_SANITIZER
+  return true;
+#else
+  return false;
+#endif
+#endif
+}
+
+bool BuiltUnderMsan() {
+#if defined(__has_feature)
+#if __has_feature(memory_sanitizer)
+  return true;
+#else
+  return false;
+#endif
+#else
+#ifdef MEMORY_SANITIZER
+  return true;
+#else
+  return false;
+#endif
+#endif
+}
+
+int64_t grpc_test_sanitizer_slowdown_factor() {
+  int64_t sanitizer_multiplier = 1;
+  if (BuiltUnderValgrind()) {
+    sanitizer_multiplier = 20;
+  } else if (BuiltUnderTsan()) {
+    sanitizer_multiplier = 5;
+  } else if (BuiltUnderAsan()) {
+    sanitizer_multiplier = 3;
+  } else if (BuiltUnderMsan()) {
+    sanitizer_multiplier = 4;
+  }
+  return sanitizer_multiplier;
+}
+
+int64_t grpc_test_slowdown_factor() {
+  return grpc_test_sanitizer_slowdown_factor() * g_fixture_slowdown_factor *
+         g_poller_slowdown_factor;
+}
+
+gpr_timespec grpc_timeout_seconds_to_deadline(int64_t time_s) {
+  return gpr_time_add(
+      gpr_now(GPR_CLOCK_MONOTONIC),
+      gpr_time_from_millis(grpc_test_slowdown_factor() * (int64_t)1e3 * time_s,
+                           GPR_TIMESPAN));
+}
+
+gpr_timespec grpc_timeout_milliseconds_to_deadline(int64_t time_ms) {
+  return gpr_time_add(
+      gpr_now(GPR_CLOCK_MONOTONIC),
+      gpr_time_from_micros(grpc_test_slowdown_factor() * (int64_t)1e3 * time_ms,
+                           GPR_TIMESPAN));
+}
+
 void grpc_test_init(int argc, char **argv) {
   install_crash_handler();
   { /* poll-cv poll strategy runs much more slowly than anything else */
     char *s = gpr_getenv("GRPC_POLL_STRATEGY");
     if (s != NULL && 0 == strcmp(s, "poll-cv")) {
-      g_poller_slowdown_factor = 5.0;
+      g_poller_slowdown_factor = 5;
     }
     gpr_free(s);
   }
-  gpr_log(GPR_DEBUG, "test slowdown: machine=%f build=%f poll=%f total=%f",
-          (double)GRPC_TEST_SLOWDOWN_MACHINE_FACTOR,
-          (double)GRPC_TEST_SLOWDOWN_BUILD_FACTOR, g_poller_slowdown_factor,
-          (double)GRPC_TEST_SLOWDOWN_FACTOR);
+  gpr_log(GPR_DEBUG,
+          "test slowdown factor: sanitizer=%" PRId64 ", fixture=%" PRId64
+          ", poller=%" PRId64 ", total=%" PRId64,
+          grpc_test_sanitizer_slowdown_factor(), g_fixture_slowdown_factor,
+          g_poller_slowdown_factor, grpc_test_slowdown_factor());
   /* seed rng with pid, so we don't end up with the same random numbers as a
      concurrently running test binary */
   srand(seed());
diff --git a/test/core/util/test_config.h b/test/core/util/test_config.h
index c13fe86a64..491f011fc8 100644
--- a/test/core/util/test_config.h
+++ b/test/core/util/test_config.h
@@ -40,32 +40,17 @@
 extern "C" {
 #endif /*  __cplusplus */
 
-#ifndef GRPC_TEST_SLOWDOWN_BUILD_FACTOR
-#define GRPC_TEST_SLOWDOWN_BUILD_FACTOR 1.0
-#endif
-
-#ifndef GRPC_TEST_SLOWDOWN_MACHINE_FACTOR
-#define GRPC_TEST_SLOWDOWN_MACHINE_FACTOR 1.0
-#endif
-
-extern double g_fixture_slowdown_factor;
-extern double g_poller_slowdown_factor;
+extern int64_t g_fixture_slowdown_factor;
+extern int64_t g_poller_slowdown_factor;
 
-#define GRPC_TEST_SLOWDOWN_FACTOR                                        \
-  (GRPC_TEST_SLOWDOWN_BUILD_FACTOR * GRPC_TEST_SLOWDOWN_MACHINE_FACTOR * \
-   g_fixture_slowdown_factor * g_poller_slowdown_factor)
+/* Returns an appropriate scaling factor for timeouts. */
+int64_t grpc_test_slowdown_factor();
 
-#define GRPC_TIMEOUT_SECONDS_TO_DEADLINE(x)                                  \
-  gpr_time_add(                                                              \
-      gpr_now(GPR_CLOCK_MONOTONIC),                                          \
-      gpr_time_from_millis((int64_t)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
-                           GPR_TIMESPAN))
+/* Converts a given timeout (in seconds) to a deadline. */
+gpr_timespec grpc_timeout_seconds_to_deadline(int64_t time_s);
 
-#define GRPC_TIMEOUT_MILLIS_TO_DEADLINE(x)                                   \
-  gpr_time_add(                                                              \
-      gpr_now(GPR_CLOCK_MONOTONIC),                                          \
-      gpr_time_from_micros((int64_t)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
-                           GPR_TIMESPAN))
+/* Converts a given timeout (in milliseconds) to a deadline. */
+gpr_timespec grpc_timeout_milliseconds_to_deadline(int64_t time_ms);
 
 #ifndef GRPC_TEST_CUSTOM_PICK_PORT
 #define GRPC_TEST_PICK_PORT
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.c
index 16df91d968..2338b81ab1 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.c
@@ -57,7 +57,8 @@ void test_tcp_server_init(test_tcp_server *server,
                           grpc_tcp_server_cb on_connect, void *user_data) {
   grpc_init();
   server->tcp_server = NULL;
-  grpc_closure_init(&server->shutdown_complete, on_server_destroyed, server);
+  grpc_closure_init(&server->shutdown_complete, on_server_destroyed, server,
+                    grpc_schedule_on_exec_ctx);
   server->shutdown = 0;
   server->pollset = gpr_malloc(grpc_pollset_size());
   grpc_pollset_init(server->pollset, &server->mu);
@@ -111,7 +112,8 @@ void test_tcp_server_destroy(test_tcp_server *server) {
   gpr_timespec shutdown_deadline;
   grpc_closure do_nothing_cb;
   grpc_tcp_server_unref(&exec_ctx, server->tcp_server);
-  grpc_closure_init(&do_nothing_cb, do_nothing, NULL);
+  grpc_closure_init(&do_nothing_cb, do_nothing, NULL,
+                    grpc_schedule_on_exec_ctx);
   shutdown_deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
                                    gpr_time_from_seconds(5, GPR_TIMESPAN));
   while (!server->shutdown &&
diff --git a/test/cpp/codegen/codegen_test_full.cc b/test/cpp/codegen/codegen_test_full.cc
index d6e2416b55..bc19fc9669 100644
--- a/test/cpp/codegen/codegen_test_full.cc
+++ b/test/cpp/codegen/codegen_test_full.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2016, Google Inc.
+ * Copyright 2017, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/test/cpp/codegen/proto_utils_test.cc b/test/cpp/codegen/proto_utils_test.cc
new file mode 100644
index 0000000000..1daa142b50
--- /dev/null
+++ b/test/cpp/codegen/proto_utils_test.cc
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/impl/codegen/proto_utils.h>
+#include <grpc++/impl/grpc_library.h>
+#include <gtest/gtest.h>
+
+namespace grpc {
+namespace internal {
+
+static GrpcLibraryInitializer g_gli_initializer;
+
+// Provide access to GrpcBufferWriter internals.
+class GrpcBufferWriterPeer {
+ public:
+  explicit GrpcBufferWriterPeer(internal::GrpcBufferWriter* writer)
+      : writer_(writer) {}
+  bool have_backup() const { return writer_->have_backup_; }
+  const grpc_slice& backup_slice() const { return writer_->backup_slice_; }
+  const grpc_slice& slice() const { return writer_->slice_; }
+
+ private:
+  GrpcBufferWriter* writer_;
+};
+
+class ProtoUtilsTest : public ::testing::Test {};
+
+// Regression test for a memory corruption bug where a series of
+// GrpcBufferWriter Next()/Backup() invocations could result in a dangling
+// pointer returned by Next() due to the interaction between grpc_slice inlining
+// and GRPC_SLICE_START_PTR.
+TEST_F(ProtoUtilsTest, BackupNext) {
+  // Ensure the GrpcBufferWriter internals are initialized.
+  g_gli_initializer.summon();
+
+  grpc_byte_buffer* bp;
+  GrpcBufferWriter writer(&bp, 8192);
+  GrpcBufferWriterPeer peer(&writer);
+
+  void* data;
+  int size;
+  // Allocate a slice.
+  ASSERT_TRUE(writer.Next(&data, &size));
+  EXPECT_EQ(8192, size);
+  // Return a single byte. Before the fix that this test acts as a regression
+  // for, this would have resulted in an inlined backup slice.
+  writer.BackUp(1);
+  EXPECT_TRUE(!peer.have_backup());
+  // On the next allocation, the slice is non-inlined.
+  ASSERT_TRUE(writer.Next(&data, &size));
+  EXPECT_TRUE(peer.slice().refcount != NULL);
+
+  // Cleanup.
+  g_core_codegen_interface->grpc_byte_buffer_destroy(bp);
+}
+
+}  // namespace internal
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/cpp/common/alarm_cpp_test.cc b/test/cpp/common/alarm_cpp_test.cc
index a05ac30b1c..41085174a4 100644
--- a/test/cpp/common/alarm_cpp_test.cc
+++ b/test/cpp/common/alarm_cpp_test.cc
@@ -43,12 +43,12 @@ namespace {
 TEST(AlarmTest, RegularExpiry) {
   CompletionQueue cq;
   void* junk = reinterpret_cast<void*>(1618033);
-  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), junk);
+  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(1), junk);
 
   void* output_tag;
   bool ok;
   const CompletionQueue::NextStatus status = cq.AsyncNext(
-      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2));
+      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(2));
 
   EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
   EXPECT_TRUE(ok);
@@ -65,7 +65,7 @@ TEST(AlarmTest, RegularExpiryChrono) {
   void* output_tag;
   bool ok;
   const CompletionQueue::NextStatus status = cq.AsyncNext(
-      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2));
+      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(2));
 
   EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
   EXPECT_TRUE(ok);
@@ -75,12 +75,12 @@ TEST(AlarmTest, RegularExpiryChrono) {
 TEST(AlarmTest, ZeroExpiry) {
   CompletionQueue cq;
   void* junk = reinterpret_cast<void*>(1618033);
-  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0), junk);
+  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(0), junk);
 
   void* output_tag;
   bool ok;
   const CompletionQueue::NextStatus status = cq.AsyncNext(
-      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0));
+      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(0));
 
   EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
   EXPECT_TRUE(ok);
@@ -90,12 +90,12 @@ TEST(AlarmTest, ZeroExpiry) {
 TEST(AlarmTest, NegativeExpiry) {
   CompletionQueue cq;
   void* junk = reinterpret_cast<void*>(1618033);
-  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(-1), junk);
+  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(-1), junk);
 
   void* output_tag;
   bool ok;
   const CompletionQueue::NextStatus status = cq.AsyncNext(
-      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0));
+      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(0));
 
   EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
   EXPECT_TRUE(ok);
@@ -105,13 +105,13 @@ TEST(AlarmTest, NegativeExpiry) {
 TEST(AlarmTest, Cancellation) {
   CompletionQueue cq;
   void* junk = reinterpret_cast<void*>(1618033);
-  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2), junk);
+  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(2), junk);
   alarm.Cancel();
 
   void* output_tag;
   bool ok;
   const CompletionQueue::NextStatus status = cq.AsyncNext(
-      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
+      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(1));
 
   EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
   EXPECT_FALSE(ok);
diff --git a/test/cpp/common/channel_arguments_test.cc b/test/cpp/common/channel_arguments_test.cc
index 60d3215265..190d32ce06 100644
--- a/test/cpp/common/channel_arguments_test.cc
+++ b/test/cpp/common/channel_arguments_test.cc
@@ -37,7 +37,11 @@
 #include <grpc/grpc.h>
 #include <grpc/support/useful.h>
 #include <gtest/gtest.h>
+
+extern "C" {
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/iomgr/socket_mutator.h"
+}
 
 namespace grpc {
 namespace testing {
@@ -228,7 +232,11 @@ TEST_F(ChannelArgumentsTest, SetSocketMutator) {
   EXPECT_FALSE(HasArg(arg0));
 
   // arg0 is destroyed by grpc_socket_mutator_to_arg(mutator1)
-  arg1.value.pointer.vtable->destroy(arg1.value.pointer.p);
+  {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    arg1.value.pointer.vtable->destroy(&exec_ctx, arg1.value.pointer.p);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
 }
 
 TEST_F(ChannelArgumentsTest, SetUserAgentPrefix) {
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 8e385d100c..32e8a41795 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -42,6 +42,7 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <grpc/support/tls.h>
@@ -228,12 +229,7 @@ class TestScenario {
       : disable_blocking(non_block),
         credentials_type(creds_type),
         message_content(content) {}
-  void Log() const {
-    gpr_log(
-        GPR_INFO,
-        "Scenario: disable_blocking %d, credentials %s, message size %" PRIuPTR,
-        disable_blocking, credentials_type.c_str(), message_content.size());
-  }
+  void Log() const;
   bool disable_blocking;
   // Although the below grpc::string's are logically const, we can't declare
   // them const because of a limitation in the way old compilers (e.g., gcc-4.4)
@@ -242,6 +238,20 @@ class TestScenario {
   grpc::string message_content;
 };
 
+static std::ostream& operator<<(std::ostream& out,
+                                const TestScenario& scenario) {
+  return out << "TestScenario{disable_blocking="
+             << (scenario.disable_blocking ? "true" : "false")
+             << ", credentials='" << scenario.credentials_type
+             << "', message_size=" << scenario.message_content.size() << "}";
+}
+
+void TestScenario::Log() const {
+  std::ostringstream out;
+  out << *this;
+  gpr_log(GPR_DEBUG, "%s", out.str().c_str());
+}
+
 class AsyncEnd2endTest : public ::testing::TestWithParam<TestScenario> {
  protected:
   AsyncEnd2endTest() { GetParam().Log(); }
@@ -254,7 +264,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<TestScenario> {
 
     // Setup server
     ServerBuilder builder;
-    auto server_creds = GetServerCredentials(GetParam().credentials_type);
+    auto server_creds = GetCredentialsProvider()->GetServerCredentials(
+        GetParam().credentials_type);
     builder.AddListeningPort(server_address_.str(), server_creds);
     builder.RegisterService(&service_);
     cq_ = builder.AddCompletionQueue();
@@ -283,8 +294,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<TestScenario> {
 
   void ResetStub() {
     ChannelArguments args;
-    auto channel_creds =
-        GetChannelCredentials(GetParam().credentials_type, &args);
+    auto channel_creds = GetCredentialsProvider()->GetChannelCredentials(
+        GetParam().credentials_type, &args);
     std::shared_ptr<Channel> channel =
         CreateCustomChannel(server_address_.str(), channel_creds, args);
     stub_ = grpc::testing::EchoTestService::NewStub(channel);
@@ -892,8 +903,8 @@ TEST_P(AsyncEnd2endTest, ServerCheckDone) {
 
 TEST_P(AsyncEnd2endTest, UnimplementedRpc) {
   ChannelArguments args;
-  auto channel_creds =
-      GetChannelCredentials(GetParam().credentials_type, &args);
+  auto channel_creds = GetCredentialsProvider()->GetChannelCredentials(
+      GetParam().credentials_type, &args);
   std::shared_ptr<Channel> channel =
       CreateCustomChannel(server_address_.str(), channel_creds, args);
   std::unique_ptr<grpc::testing::UnimplementedEchoService::Stub> stub;
@@ -1404,11 +1415,15 @@ std::vector<TestScenario> CreateTestScenarios(bool test_disable_blocking,
   std::vector<grpc::string> credentials_types;
   std::vector<grpc::string> messages;
 
-  credentials_types.push_back(kInsecureCredentialsType);
-  auto sec_list = GetSecureCredentialsTypeList();
+  if (GetCredentialsProvider()->GetChannelCredentials(kInsecureCredentialsType,
+                                                      nullptr) != nullptr) {
+    credentials_types.push_back(kInsecureCredentialsType);
+  }
+  auto sec_list = GetCredentialsProvider()->GetSecureCredentialsTypeList();
   for (auto sec = sec_list.begin(); sec != sec_list.end(); sec++) {
     credentials_types.push_back(*sec);
   }
+  GPR_ASSERT(!credentials_types.empty());
 
   messages.push_back("Hello");
   for (int sz = 1; sz < test_big_limit; sz *= 2) {
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 9bb892c694..47e5c5bd77 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -209,10 +209,7 @@ class TestScenario {
  public:
   TestScenario(bool proxy, const grpc::string& creds_type)
       : use_proxy(proxy), credentials_type(creds_type) {}
-  void Log() const {
-    gpr_log(GPR_INFO, "Scenario: proxy %d, credentials %s", use_proxy,
-            credentials_type.c_str());
-  }
+  void Log() const;
   bool use_proxy;
   // Although the below grpc::string is logically const, we can't declare
   // them const because of a limitation in the way old compilers (e.g., gcc-4.4)
@@ -220,6 +217,19 @@ class TestScenario {
   grpc::string credentials_type;
 };
 
+static std::ostream& operator<<(std::ostream& out,
+                                const TestScenario& scenario) {
+  return out << "TestScenario{use_proxy="
+             << (scenario.use_proxy ? "true" : "false") << ", credentials='"
+             << scenario.credentials_type << "'}";
+}
+
+void TestScenario::Log() const {
+  std::ostringstream out;
+  out << *this;
+  gpr_log(GPR_DEBUG, "%s", out.str().c_str());
+}
+
 class End2endTest : public ::testing::TestWithParam<TestScenario> {
  protected:
   End2endTest()
@@ -242,7 +252,8 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
     // Setup server
     ServerBuilder builder;
     ConfigureServerBuilder(&builder);
-    auto server_creds = GetServerCredentials(GetParam().credentials_type);
+    auto server_creds = GetCredentialsProvider()->GetServerCredentials(
+        GetParam().credentials_type);
     if (GetParam().credentials_type != kInsecureCredentialsType) {
       server_creds->SetAuthMetadataProcessor(processor);
     }
@@ -270,8 +281,8 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
     }
     EXPECT_TRUE(is_server_started_);
     ChannelArguments args;
-    auto channel_creds =
-        GetChannelCredentials(GetParam().credentials_type, &args);
+    auto channel_creds = GetCredentialsProvider()->GetChannelCredentials(
+        GetParam().credentials_type, &args);
     if (!user_agent_prefix_.empty()) {
       args.SetUserAgentPrefix(user_agent_prefix_);
     }
@@ -635,7 +646,7 @@ TEST_P(End2endServerTryCancelTest, BidiStreamServerCancelAfter) {
   TestBidiStreamServerCancel(CANCEL_AFTER_PROCESSING, 5);
 }
 
-TEST_P(End2endTest, SimpleRpcWithCustomeUserAgentPrefix) {
+TEST_P(End2endTest, SimpleRpcWithCustomUserAgentPrefix) {
   user_agent_prefix_ = "custom_prefix";
   ResetStub();
   EchoRequest request;
@@ -890,6 +901,8 @@ TEST_P(End2endTest, RpcMaxMessageSize) {
   EchoRequest request;
   EchoResponse response;
   request.set_message(string(kMaxMessageSize_ * 2, 'a'));
+  // cancelled is not guaranteed to appear before the end of the service handler
+  request.mutable_param()->set_skip_cancelled_check(true);
 
   ClientContext context;
   Status s = stub_->Echo(&context, request, &response);
@@ -1292,6 +1305,7 @@ TEST_P(SecureEnd2endTest, BlockingAuthMetadataPluginAndProcessorFailure) {
   EXPECT_FALSE(s.ok());
   EXPECT_EQ(s.error_code(), StatusCode::UNAUTHENTICATED);
 }
+
 TEST_P(SecureEnd2endTest, SetPerCallCredentials) {
   ResetStub();
   EchoRequest request;
@@ -1520,11 +1534,18 @@ std::vector<TestScenario> CreateTestScenarios(bool use_proxy,
   std::vector<TestScenario> scenarios;
   std::vector<grpc::string> credentials_types;
   if (test_secure) {
-    credentials_types = GetSecureCredentialsTypeList();
+    credentials_types =
+        GetCredentialsProvider()->GetSecureCredentialsTypeList();
   }
   if (test_insecure) {
-    credentials_types.push_back(kInsecureCredentialsType);
+    // Only add insecure credentials type when it is registered with the
+    // provider. User may create providers that do not have insecure.
+    if (GetCredentialsProvider()->GetChannelCredentials(
+            kInsecureCredentialsType, nullptr) != nullptr) {
+      credentials_types.push_back(kInsecureCredentialsType);
+    }
   }
+  GPR_ASSERT(!credentials_types.empty());
   for (auto it = credentials_types.begin(); it != credentials_types.end();
        ++it) {
     scenarios.emplace_back(false, *it);
@@ -1541,7 +1562,7 @@ INSTANTIATE_TEST_CASE_P(End2end, End2endTest,
 
 INSTANTIATE_TEST_CASE_P(End2endServerTryCancel, End2endServerTryCancelTest,
                         ::testing::ValuesIn(CreateTestScenarios(false, true,
-                                                                false)));
+                                                                true)));
 
 INSTANTIATE_TEST_CASE_P(ProxyEnd2end, ProxyEnd2endTest,
                         ::testing::ValuesIn(CreateTestScenarios(true, true,
diff --git a/test/cpp/end2end/shutdown_test.cc b/test/cpp/end2end/shutdown_test.cc
index 5b52b1fc1a..bd68e851d3 100644
--- a/test/cpp/end2end/shutdown_test.cc
+++ b/test/cpp/end2end/shutdown_test.cc
@@ -49,6 +49,7 @@
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
+#include "test/cpp/util/test_credentials_provider.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -72,7 +73,7 @@ class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
   gpr_event* ev_;
 };
 
-class ShutdownTest : public ::testing::Test {
+class ShutdownTest : public ::testing::TestWithParam<string> {
  public:
   ShutdownTest() : shutdown_(false), service_(&ev_) { gpr_event_init(&ev_); }
 
@@ -85,7 +86,9 @@ class ShutdownTest : public ::testing::Test {
     grpc::string server_address = "localhost:" + to_string(port);
 
     ServerBuilder builder;
-    builder.AddListeningPort(server_address, InsecureServerCredentials());
+    auto server_creds =
+        GetCredentialsProvider()->GetServerCredentials(GetParam());
+    builder.AddListeningPort(server_address, server_creds);
     builder.RegisterService(&service_);
     std::unique_ptr<Server> server = builder.BuildAndStart();
     return server;
@@ -95,7 +98,10 @@ class ShutdownTest : public ::testing::Test {
 
   void ResetStub() {
     string target = "dns:localhost:" + to_string(port_);
-    channel_ = CreateChannel(target, InsecureChannelCredentials());
+    ChannelArguments args;
+    auto channel_creds =
+        GetCredentialsProvider()->GetChannelCredentials(GetParam(), &args);
+    channel_ = CreateCustomChannel(target, channel_creds, args);
     stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
@@ -125,8 +131,31 @@ class ShutdownTest : public ::testing::Test {
   TestServiceImpl service_;
 };
 
+std::vector<string> GetAllCredentialsTypeList() {
+  std::vector<grpc::string> credentials_types;
+  if (GetCredentialsProvider()->GetChannelCredentials(kInsecureCredentialsType,
+                                                      nullptr) != nullptr) {
+    credentials_types.push_back(kInsecureCredentialsType);
+  }
+  auto sec_list = GetCredentialsProvider()->GetSecureCredentialsTypeList();
+  for (auto sec = sec_list.begin(); sec != sec_list.end(); sec++) {
+    credentials_types.push_back(*sec);
+  }
+  GPR_ASSERT(!credentials_types.empty());
+
+  std::string credentials_type_list("credentials types:");
+  for (const string& type : credentials_types) {
+    credentials_type_list.append(" " + type);
+  }
+  gpr_log(GPR_INFO, "%s", credentials_type_list.c_str());
+  return credentials_types;
+}
+
+INSTANTIATE_TEST_CASE_P(End2EndShutdown, ShutdownTest,
+                        ::testing::ValuesIn(GetAllCredentialsTypeList()));
+
 // TODO(ctiller): leaked objects in this test
-TEST_F(ShutdownTest, ShutdownTest) {
+TEST_P(ShutdownTest, ShutdownTest) {
   ResetStub();
 
   // send the request in a background thread
diff --git a/test/cpp/grpclb/grpclb_api_test.cc b/test/cpp/grpclb/grpclb_api_test.cc
index 191d729a9e..82ccf436f8 100644
--- a/test/cpp/grpclb/grpclb_api_test.cc
+++ b/test/cpp/grpclb/grpclb_api_test.cc
@@ -63,7 +63,7 @@ grpc::string PackedStringToIp(const grpc_grpclb_ip_address& pb_ip) {
   } else {
     abort();
   }
-  GPR_ASSERT(inet_ntop(af, pb_ip.bytes, ip_str, 46) != NULL);
+  GPR_ASSERT(inet_ntop(af, (void*)pb_ip.bytes, ip_str, 46) != NULL);
   return ip_str;
 }
 
diff --git a/test/cpp/grpclb/grpclb_test.cc b/test/cpp/grpclb/grpclb_test.cc
index de304b9f89..89ed9249ad 100644
--- a/test/cpp/grpclb/grpclb_test.cc
+++ b/test/cpp/grpclb/grpclb_test.cc
@@ -52,8 +52,10 @@
 #include <grpc++/impl/codegen/config.h>
 extern "C" {
 #include "src/core/ext/client_channel/client_channel.h"
+#include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/channel_stack.h"
 #include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/security/credentials/fake/fake_credentials.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/support/tmpfile.h"
 #include "src/core/lib/surface/channel.h"
@@ -110,6 +112,7 @@ typedef struct server_fixture {
   grpc_call *server_call;
   grpc_completion_queue *cq;
   char *servers_hostport;
+  const char *balancer_name;
   int port;
   const char *lb_token_prefix;
   gpr_thd_id tid;
@@ -170,7 +173,7 @@ static grpc_slice build_response_payload_slice(
 static void drain_cq(grpc_completion_queue *cq) {
   grpc_event ev;
   do {
-    ev = grpc_completion_queue_next(cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5),
+    ev = grpc_completion_queue_next(cq, grpc_timeout_seconds_to_deadline(5),
                                     NULL);
   } while (ev.type != GRPC_QUEUE_SHUTDOWN);
 }
@@ -201,10 +204,12 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
                                    &request_metadata_recv, sf->cq, sf->cq,
                                    tag(200));
   GPR_ASSERT(GRPC_CALL_OK == error);
-  gpr_log(GPR_INFO, "LB Server[%s] up", sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) up", sf->servers_hostport,
+          sf->balancer_name);
   CQ_EXPECT_COMPLETION(cqv, tag(200), 1);
   cq_verify(cqv);
-  gpr_log(GPR_INFO, "LB Server[%s] after tag 200", sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) after tag 200", sf->servers_hostport,
+          sf->balancer_name);
 
   // make sure we've received the initial metadata from the grpclb request.
   GPR_ASSERT(request_metadata_recv.count > 0);
@@ -213,7 +218,7 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   // receive request for backends
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message = &request_payload_recv;
+  op->data.recv_message.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -221,7 +226,8 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(202), 1);
   cq_verify(cqv);
-  gpr_log(GPR_INFO, "LB Server[%s] after RECV_MSG", sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) after RECV_MSG", sf->servers_hostport,
+          sf->balancer_name);
 
   // validate initial request.
   grpc_byte_buffer_reader bbr;
@@ -250,7 +256,8 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(201), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
-  gpr_log(GPR_INFO, "LB Server[%s] after tag 201", sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) after tag 201", sf->servers_hostport,
+          sf->balancer_name);
 
   for (int i = 0; i < 2; i++) {
     if (i == 0) {
@@ -268,7 +275,7 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
     response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = response_payload;
+    op->data.send_message.send_message = response_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -276,19 +283,21 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(203), 1);
     cq_verify(cqv);
-    gpr_log(GPR_INFO, "LB Server[%s] after SEND_MESSAGE, iter %d",
-            sf->servers_hostport, i);
+    gpr_log(GPR_INFO, "LB Server[%s](%s) after SEND_MESSAGE, iter %d",
+            sf->servers_hostport, sf->balancer_name, i);
 
     grpc_byte_buffer_destroy(response_payload);
     grpc_slice_unref(response_payload_slice);
   }
-  gpr_log(GPR_INFO, "LB Server[%s] shutting down", sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) shutting down", sf->servers_hostport,
+          sf->balancer_name);
 
   op = ops;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_OK;
-  op->data.send_status_from_server.status_details = "xyz";
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -298,8 +307,8 @@ static void start_lb_server(server_fixture *sf, int *ports, size_t nports,
   CQ_EXPECT_COMPLETION(cqv, tag(201), 1);
   CQ_EXPECT_COMPLETION(cqv, tag(204), 1);
   cq_verify(cqv);
-  gpr_log(GPR_INFO, "LB Server[%s] after tag 204. All done. LB server out",
-          sf->servers_hostport);
+  gpr_log(GPR_INFO, "LB Server[%s](%s) after tag 204. All done. LB server out",
+          sf->servers_hostport, sf->balancer_name);
 
   grpc_call_destroy(s);
 
@@ -335,7 +344,7 @@ static void start_backend_server(server_fixture *sf) {
     GPR_ASSERT(GRPC_CALL_OK == error);
     gpr_log(GPR_INFO, "Server[%s] up", sf->servers_hostport);
     ev = grpc_completion_queue_next(sf->cq,
-                                    GRPC_TIMEOUT_SECONDS_TO_DEADLINE(60), NULL);
+                                    grpc_timeout_seconds_to_deadline(60), NULL);
     if (!ev.success) {
       gpr_log(GPR_INFO, "Server[%s] being torn down", sf->servers_hostport);
       cq_verifier_destroy(cqv);
@@ -372,14 +381,14 @@ static void start_backend_server(server_fixture *sf) {
     while (!exit) {
       op = ops;
       op->op = GRPC_OP_RECV_MESSAGE;
-      op->data.recv_message = &request_payload_recv;
+      op->data.recv_message.recv_message = &request_payload_recv;
       op->flags = 0;
       op->reserved = NULL;
       op++;
       error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
       GPR_ASSERT(GRPC_CALL_OK == error);
       ev = grpc_completion_queue_next(
-          sf->cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), NULL);
+          sf->cq, grpc_timeout_seconds_to_deadline(3), NULL);
       if (ev.type == GRPC_OP_COMPLETE && ev.success) {
         GPR_ASSERT(ev.tag = tag(102));
         if (request_payload_recv == NULL) {
@@ -401,7 +410,7 @@ static void start_backend_server(server_fixture *sf) {
             grpc_raw_byte_buffer_create(&response_payload_slice, 1);
         op = ops;
         op->op = GRPC_OP_SEND_MESSAGE;
-        op->data.send_message = response_payload;
+        op->data.send_message.send_message = response_payload;
         op->flags = 0;
         op->reserved = NULL;
         op++;
@@ -409,7 +418,7 @@ static void start_backend_server(server_fixture *sf) {
             grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
         GPR_ASSERT(GRPC_CALL_OK == error);
         ev = grpc_completion_queue_next(
-            sf->cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), NULL);
+            sf->cq, grpc_timeout_seconds_to_deadline(3), NULL);
         if (ev.type == GRPC_OP_COMPLETE && ev.success) {
           GPR_ASSERT(ev.tag = tag(103));
         } else {
@@ -433,7 +442,9 @@ static void start_backend_server(server_fixture *sf) {
     op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
     op->data.send_status_from_server.trailing_metadata_count = 0;
     op->data.send_status_from_server.status = GRPC_STATUS_OK;
-    op->data.send_status_from_server.status_details = "Backend server out a-ok";
+    grpc_slice status_details =
+        grpc_slice_from_static_string("Backend server out a-ok");
+    op->data.send_status_from_server.status_details = &status_details;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -462,8 +473,7 @@ static void perform_request(client_fixture *cf) {
   grpc_metadata_array trailing_metadata_recv;
   grpc_status_code status;
   grpc_call_error error;
-  char *details = NULL;
-  size_t details_capacity = 0;
+  grpc_slice details;
   grpc_byte_buffer *request_payload;
   grpc_byte_buffer *response_payload_recv;
   int i;
@@ -472,9 +482,11 @@ static void perform_request(client_fixture *cf) {
   grpc_slice request_payload_slice =
       grpc_slice_from_copied_string("hello world");
 
+  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr:1234");
   c = grpc_channel_create_call(cf->client, NULL, GRPC_PROPAGATE_DEFAULTS,
-                               cf->cq, "/foo", "foo.test.google.fr:1234",
-                               GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL);
+                               cf->cq, grpc_slice_from_static_string("/foo"),
+                               &host, grpc_timeout_seconds_to_deadline(5),
+                               NULL);
   gpr_log(GPR_INFO, "Call 0x%" PRIxPTR " created", (intptr_t)c);
   GPR_ASSERT(c);
   char *peer;
@@ -489,7 +501,7 @@ static void perform_request(client_fixture *cf) {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -497,7 +509,6 @@ static void perform_request(client_fixture *cf) {
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
-  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
@@ -509,12 +520,12 @@ static void perform_request(client_fixture *cf) {
 
     op = ops;
     op->op = GRPC_OP_SEND_MESSAGE;
-    op->data.send_message = request_payload;
+    op->data.send_message.send_message = request_payload;
     op->flags = 0;
     op->reserved = NULL;
     op++;
     op->op = GRPC_OP_RECV_MESSAGE;
-    op->data.recv_message = &response_payload_recv;
+    op->data.recv_message.recv_message = &response_payload_recv;
     op->flags = 0;
     op->reserved = NULL;
     op++;
@@ -553,15 +564,43 @@ static void perform_request(client_fixture *cf) {
 
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
-  gpr_free(details);
+  grpc_slice_unref(details);
   gpr_log(GPR_INFO, "Client call (peer %s) DESTROYED.", peer);
   gpr_free(peer);
 }
 
-static void setup_client(const char *server_hostport, client_fixture *cf) {
+#define BALANCERS_NAME "lb.name"
+static void setup_client(const server_fixture *lb_server,
+                         const server_fixture *backends, client_fixture *cf) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  char *lb_uri;
+  // The grpclb LB policy will be automatically selected by virtue of
+  // the fact that the returned addresses are balancer addresses.
+  gpr_asprintf(&lb_uri, "test:///%s?lb_enabled=1&balancer_names=%s",
+               lb_server->servers_hostport, lb_server->balancer_name);
+
+  grpc_arg expected_target_arg;
+  expected_target_arg.type = GRPC_ARG_STRING;
+  expected_target_arg.key =
+      const_cast<char *>(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS);
+
+  char *expected_target_names = NULL;
+  const char *backends_name = lb_server->servers_hostport;
+  gpr_asprintf(&expected_target_names, "%s;%s", backends_name, BALANCERS_NAME);
+
+  expected_target_arg.value.string = const_cast<char *>(expected_target_names);
+  grpc_channel_args *args =
+      grpc_channel_args_copy_and_add(NULL, &expected_target_arg, 1);
+  gpr_free(expected_target_names);
+
   cf->cq = grpc_completion_queue_create(NULL);
-  cf->server_uri = gpr_strdup(server_hostport);
-  cf->client = grpc_insecure_channel_create(cf->server_uri, NULL, NULL);
+  cf->server_uri = lb_uri;
+  grpc_channel_credentials *fake_creds =
+      grpc_fake_transport_security_credentials_create();
+  cf->client =
+      grpc_secure_channel_create(fake_creds, cf->server_uri, args, NULL);
+  grpc_channel_credentials_unref(&exec_ctx, fake_creds);
+  grpc_channel_args_destroy(&exec_ctx, args);
 }
 
 static void teardown_client(client_fixture *cf) {
@@ -588,10 +627,14 @@ static void setup_server(const char *host, server_fixture *sf) {
     gpr_join_host_port(&sf->servers_hostport, host, sf->port);
   }
 
+  grpc_server_credentials *server_creds =
+      grpc_fake_transport_security_server_credentials_create();
+
   sf->server = grpc_server_create(NULL, NULL);
   grpc_server_register_completion_queue(sf->server, sf->cq, NULL);
-  GPR_ASSERT((assigned_port = grpc_server_add_insecure_http2_port(
-                  sf->server, sf->servers_hostport)) > 0);
+  GPR_ASSERT((assigned_port = grpc_server_add_secure_http2_port(
+                  sf->server, sf->servers_hostport, server_creds)) > 0);
+  grpc_server_credentials_release(server_creds);
   GPR_ASSERT(sf->port == assigned_port);
   grpc_server_start(sf->server);
 }
@@ -602,7 +645,7 @@ static void teardown_server(server_fixture *sf) {
   gpr_log(GPR_INFO, "Server[%s] shutting down", sf->servers_hostport);
   grpc_server_shutdown_and_notify(sf->server, sf->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
-                 sf->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 sf->cq, tag(1000), grpc_timeout_seconds_to_deadline(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(sf->server);
   gpr_thd_join(sf->tid);
@@ -653,17 +696,10 @@ static test_fixture setup_test_fixture(int lb_server_update_delay_ms) {
   }
 
   tf.lb_server.lb_token_prefix = LB_TOKEN_PREFIX;
+  tf.lb_server.balancer_name = BALANCERS_NAME;
   setup_server("127.0.0.1", &tf.lb_server);
   gpr_thd_new(&tf.lb_server.tid, fork_lb_server, &tf.lb_server, &options);
-
-  char *server_uri;
-  // The grpclb LB policy will be automatically selected by virtue of
-  // the fact that the returned addresses are balancer addresses.
-  gpr_asprintf(&server_uri, "test:///%s?lb_enabled=1",
-               tf.lb_server.servers_hostport);
-  setup_client(server_uri, &tf.client);
-  gpr_free(server_uri);
-
+  setup_client(&tf.lb_server, tf.lb_backends, &tf.client);
   return tf;
 }
 
@@ -708,8 +744,9 @@ TEST(GrpclbTest, Updates) {
   // batch 1. All subsequent picks will come from the second half of the
   // backends, those coming in the LB update.
   tf_result = grpc::test_update(800);
-  GPR_ASSERT(tf_result.lb_backends[0].num_calls_serviced == 1);
-  GPR_ASSERT(tf_result.lb_backends[1].num_calls_serviced == 0);
+  GPR_ASSERT(tf_result.lb_backends[0].num_calls_serviced +
+                 tf_result.lb_backends[1].num_calls_serviced ==
+             1);
   GPR_ASSERT(tf_result.lb_backends[2].num_calls_serviced +
                  tf_result.lb_backends[3].num_calls_serviced >
              0);
@@ -725,8 +762,9 @@ TEST(GrpclbTest, Updates) {
   // update. In any case, the total number of serviced calls must again be equal
   // to four across all the backends.
   tf_result = grpc::test_update(2500);
-  GPR_ASSERT(tf_result.lb_backends[0].num_calls_serviced >= 1);
-  GPR_ASSERT(tf_result.lb_backends[1].num_calls_serviced == 1);
+  GPR_ASSERT(tf_result.lb_backends[0].num_calls_serviced +
+                 tf_result.lb_backends[1].num_calls_serviced >=
+             2);
   GPR_ASSERT(tf_result.lb_backends[2].num_calls_serviced +
                  tf_result.lb_backends[3].num_calls_serviced >
              0);
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index c58910abc3..8a00b61cef 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -32,8 +32,7 @@
  */
 
 #include <memory>
-
-#include <unistd.h>
+#include <unordered_map>
 
 #include <gflags/gflags.h>
 #include <grpc++/channel.h>
@@ -49,6 +48,7 @@
 #include "test/cpp/util/test_config.h"
 
 DEFINE_bool(use_tls, false, "Whether to use tls.");
+DEFINE_string(custom_credentials_type, "", "User provided credentials type.");
 DEFINE_bool(use_test_ca, false, "False to use SSL roots for google");
 DEFINE_int32(server_port, 0, "Server port.");
 DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
@@ -107,119 +107,78 @@ int main(int argc, char** argv) {
   grpc::testing::InteropClient client(CreateChannelForTestCase(FLAGS_test_case),
                                       true,
                                       FLAGS_do_not_abort_on_transient_failures);
-  if (FLAGS_test_case == "empty_unary") {
-    client.DoEmpty();
-  } else if (FLAGS_test_case == "large_unary") {
-    client.DoLargeUnary();
-  } else if (FLAGS_test_case == "server_compressed_unary") {
-    client.DoServerCompressedUnary();
-  } else if (FLAGS_test_case == "client_compressed_unary") {
-    client.DoClientCompressedUnary();
-  } else if (FLAGS_test_case == "client_streaming") {
-    client.DoRequestStreaming();
-  } else if (FLAGS_test_case == "server_streaming") {
-    client.DoResponseStreaming();
-  } else if (FLAGS_test_case == "server_compressed_streaming") {
-    client.DoServerCompressedStreaming();
-  } else if (FLAGS_test_case == "client_compressed_streaming") {
-    client.DoClientCompressedStreaming();
-  } else if (FLAGS_test_case == "slow_consumer") {
-    client.DoResponseStreamingWithSlowConsumer();
-  } else if (FLAGS_test_case == "half_duplex") {
-    client.DoHalfDuplex();
-  } else if (FLAGS_test_case == "ping_pong") {
-    client.DoPingPong();
-  } else if (FLAGS_test_case == "cancel_after_begin") {
-    client.DoCancelAfterBegin();
-  } else if (FLAGS_test_case == "cancel_after_first_response") {
-    client.DoCancelAfterFirstResponse();
-  } else if (FLAGS_test_case == "timeout_on_sleeping_server") {
-    client.DoTimeoutOnSleepingServer();
-  } else if (FLAGS_test_case == "empty_stream") {
-    client.DoEmptyStream();
-  } else if (FLAGS_test_case == "compute_engine_creds") {
-    client.DoComputeEngineCreds(FLAGS_default_service_account,
-                                FLAGS_oauth_scope);
-  } else if (FLAGS_test_case == "jwt_token_creds") {
-    grpc::string json_key = GetServiceAccountJsonKey();
-    client.DoJwtTokenCreds(json_key);
-  } else if (FLAGS_test_case == "oauth2_auth_token") {
-    client.DoOauth2AuthToken(FLAGS_default_service_account, FLAGS_oauth_scope);
-  } else if (FLAGS_test_case == "per_rpc_creds") {
-    grpc::string json_key = GetServiceAccountJsonKey();
-    client.DoPerRpcCreds(json_key);
-  } else if (FLAGS_test_case == "status_code_and_message") {
-    client.DoStatusWithMessage();
-  } else if (FLAGS_test_case == "custom_metadata") {
-    client.DoCustomMetadata();
-  } else if (FLAGS_test_case == "unimplemented_method") {
-    client.DoUnimplementedMethod();
-  } else if (FLAGS_test_case == "unimplemented_service") {
-    client.DoUnimplementedService();
-  } else if (FLAGS_test_case == "cacheable_unary") {
-    client.DoCacheableUnary();
-  } else if (FLAGS_test_case == "all") {
-    client.DoEmpty();
-    client.DoLargeUnary();
-    client.DoClientCompressedUnary();
-    client.DoServerCompressedUnary();
-    client.DoRequestStreaming();
-    client.DoResponseStreaming();
-    client.DoClientCompressedStreaming();
-    client.DoServerCompressedStreaming();
-    client.DoHalfDuplex();
-    client.DoPingPong();
-    client.DoCancelAfterBegin();
-    client.DoCancelAfterFirstResponse();
-    client.DoTimeoutOnSleepingServer();
-    client.DoEmptyStream();
-    client.DoStatusWithMessage();
-    client.DoCustomMetadata();
-    client.DoUnimplementedMethod();
-    client.DoUnimplementedService();
-    client.DoCacheableUnary();
-    // service_account_creds and jwt_token_creds can only run with ssl.
-    if (FLAGS_use_tls) {
-      grpc::string json_key = GetServiceAccountJsonKey();
-      client.DoJwtTokenCreds(json_key);
-      client.DoOauth2AuthToken(FLAGS_default_service_account,
-                               FLAGS_oauth_scope);
-      client.DoPerRpcCreds(json_key);
+
+  std::unordered_map<grpc::string, std::function<bool()>> actions;
+  actions["empty_unary"] =
+      std::bind(&grpc::testing::InteropClient::DoEmpty, &client);
+  actions["large_unary"] =
+      std::bind(&grpc::testing::InteropClient::DoLargeUnary, &client);
+  actions["server_compressed_unary"] = std::bind(
+      &grpc::testing::InteropClient::DoServerCompressedUnary, &client);
+  actions["client_compressed_unary"] = std::bind(
+      &grpc::testing::InteropClient::DoClientCompressedUnary, &client);
+  actions["client_streaming"] =
+      std::bind(&grpc::testing::InteropClient::DoRequestStreaming, &client);
+  actions["server_streaming"] =
+      std::bind(&grpc::testing::InteropClient::DoResponseStreaming, &client);
+  actions["server_compressed_streaming"] = std::bind(
+      &grpc::testing::InteropClient::DoServerCompressedStreaming, &client);
+  actions["client_compressed_streaming"] = std::bind(
+      &grpc::testing::InteropClient::DoClientCompressedStreaming, &client);
+  actions["slow_consumer"] = std::bind(
+      &grpc::testing::InteropClient::DoResponseStreamingWithSlowConsumer,
+      &client);
+  actions["half_duplex"] =
+      std::bind(&grpc::testing::InteropClient::DoHalfDuplex, &client);
+  actions["ping_pong"] =
+      std::bind(&grpc::testing::InteropClient::DoPingPong, &client);
+  actions["cancel_after_begin"] =
+      std::bind(&grpc::testing::InteropClient::DoCancelAfterBegin, &client);
+  actions["cancel_after_first_response"] = std::bind(
+      &grpc::testing::InteropClient::DoCancelAfterFirstResponse, &client);
+  actions["timeout_on_sleeping_server"] = std::bind(
+      &grpc::testing::InteropClient::DoTimeoutOnSleepingServer, &client);
+  actions["empty_stream"] =
+      std::bind(&grpc::testing::InteropClient::DoEmptyStream, &client);
+  if (FLAGS_use_tls) {
+    actions["compute_engine_creds"] =
+        std::bind(&grpc::testing::InteropClient::DoComputeEngineCreds, &client,
+                  FLAGS_default_service_account, FLAGS_oauth_scope);
+    actions["jwt_token_creds"] =
+        std::bind(&grpc::testing::InteropClient::DoJwtTokenCreds, &client,
+                  GetServiceAccountJsonKey());
+    actions["oauth2_auth_token"] =
+        std::bind(&grpc::testing::InteropClient::DoOauth2AuthToken, &client,
+                  FLAGS_default_service_account, FLAGS_oauth_scope);
+    actions["per_rpc_creds"] =
+        std::bind(&grpc::testing::InteropClient::DoPerRpcCreds, &client,
+                  GetServiceAccountJsonKey());
+  }
+  actions["status_code_and_message"] =
+      std::bind(&grpc::testing::InteropClient::DoStatusWithMessage, &client);
+  actions["custom_metadata"] =
+      std::bind(&grpc::testing::InteropClient::DoCustomMetadata, &client);
+  actions["unimplemented_method"] =
+      std::bind(&grpc::testing::InteropClient::DoUnimplementedMethod, &client);
+  actions["unimplemented_service"] =
+      std::bind(&grpc::testing::InteropClient::DoUnimplementedService, &client);
+  // actions["cacheable_unary"] =
+  //    std::bind(&grpc::testing::InteropClient::DoCacheableUnary, &client);
+
+  if (FLAGS_test_case == "all") {
+    for (const auto& action : actions) {
+      action.second();
     }
-    // compute_engine_creds only runs in GCE.
+  } else if (actions.find(FLAGS_test_case) != actions.end()) {
+    actions.find(FLAGS_test_case)->second();
   } else {
-    const char* testcases[] = {"all",
-                               "cacheable_unary",
-                               "cancel_after_begin",
-                               "cancel_after_first_response",
-                               "client_compressed_streaming",
-                               "client_compressed_unary",
-                               "client_streaming",
-                               "compute_engine_creds",
-                               "custom_metadata",
-                               "empty_stream",
-                               "empty_unary",
-                               "half_duplex",
-                               "jwt_token_creds",
-                               "large_unary",
-                               "oauth2_auth_token",
-                               "oauth2_auth_token",
-                               "per_rpc_creds",
-                               "per_rpc_creds",
-                               "ping_pong",
-                               "server_compressed_streaming",
-                               "server_compressed_unary",
-                               "server_streaming",
-                               "status_code_and_message",
-                               "timeout_on_sleeping_server",
-                               "unimplemented_method",
-                               "unimplemented_service"};
-    char* joined_testcases =
-        gpr_strjoin_sep(testcases, GPR_ARRAY_SIZE(testcases), "\n", NULL);
-
+    grpc::string test_cases;
+    for (const auto& action : actions) {
+      if (!test_cases.empty()) test_cases += "\n";
+      test_cases += action.first;
+    }
     gpr_log(GPR_ERROR, "Unsupported test case %s. Valid options are\n%s",
-            FLAGS_test_case.c_str(), joined_testcases);
-    gpr_free(joined_testcases);
+            FLAGS_test_case.c_str(), test_cases.c_str());
     ret = 1;
   }
 
diff --git a/test/cpp/interop/client_helper.cc b/test/cpp/interop/client_helper.cc
index c171969e14..d3192ad0c9 100644
--- a/test/cpp/interop/client_helper.cc
+++ b/test/cpp/interop/client_helper.cc
@@ -33,8 +33,6 @@
 
 #include "test/cpp/interop/client_helper.h"
 
-#include <unistd.h>
-
 #include <fstream>
 #include <memory>
 #include <sstream>
@@ -50,8 +48,10 @@
 #include "src/cpp/client/secure_credentials.h"
 #include "test/core/security/oauth2_utils.h"
 #include "test/cpp/util/create_test_channel.h"
+#include "test/cpp/util/test_credentials_provider.h"
 
 DECLARE_bool(use_tls);
+DECLARE_string(custom_credentials_type);
 DECLARE_bool(use_test_ca);
 DECLARE_int32(server_port);
 DECLARE_string(server_host);
@@ -114,8 +114,12 @@ std::shared_ptr<Channel> CreateChannelForTestCase(
     creds = AccessTokenCredentials(raw_token);
     GPR_ASSERT(creds);
   }
-  return CreateTestChannel(host_port, FLAGS_server_host_override, FLAGS_use_tls,
-                           !FLAGS_use_test_ca, creds);
+  if (FLAGS_custom_credentials_type.empty()) {
+    return CreateTestChannel(host_port, FLAGS_server_host_override,
+                             FLAGS_use_tls, !FLAGS_use_test_ca, creds);
+  } else {
+    return CreateTestChannel(host_port, FLAGS_custom_credentials_type, creds);
+  }
 }
 
 }  // namespace testing
diff --git a/test/cpp/interop/http2_client.cc b/test/cpp/interop/http2_client.cc
new file mode 100644
index 0000000000..38aee43b26
--- /dev/null
+++ b/test/cpp/interop/http2_client.cc
@@ -0,0 +1,272 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <thread>
+
+#include <gflags/gflags.h>
+#include <grpc++/channel.h>
+#include <grpc++/client_context.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/transport/byte_stream.h"
+#include "src/proto/grpc/testing/messages.grpc.pb.h"
+#include "src/proto/grpc/testing/test.grpc.pb.h"
+#include "test/cpp/interop/http2_client.h"
+
+#include "src/core/lib/support/string.h"
+#include "test/cpp/util/create_test_channel.h"
+#include "test/cpp/util/test_config.h"
+
+namespace grpc {
+namespace testing {
+
+namespace {
+const int kLargeRequestSize = 271828;
+const int kLargeResponseSize = 314159;
+}  // namespace
+
+Http2Client::ServiceStub::ServiceStub(std::shared_ptr<Channel> channel)
+    : channel_(channel) {
+  stub_ = TestService::NewStub(channel);
+}
+
+TestService::Stub* Http2Client::ServiceStub::Get() { return stub_.get(); }
+
+Http2Client::Http2Client(std::shared_ptr<Channel> channel)
+    : serviceStub_(channel), channel_(channel) {}
+
+bool Http2Client::AssertStatusCode(const Status& s, StatusCode expected_code) {
+  if (s.error_code() == expected_code) {
+    return true;
+  }
+
+  gpr_log(GPR_ERROR, "Error status code: %d (expected: %d), message: %s",
+          s.error_code(), expected_code, s.error_message().c_str());
+  abort();
+}
+
+bool Http2Client::DoRstAfterHeader() {
+  gpr_log(GPR_DEBUG, "Sending RPC and expecting reset stream after header");
+
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+  Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::UNKNOWN);
+  GPR_ASSERT(!response.has_payload());  // no data should be received
+
+  gpr_log(GPR_DEBUG, "Done testing reset stream after header");
+  return true;
+}
+
+bool Http2Client::DoRstAfterData() {
+  gpr_log(GPR_DEBUG, "Sending RPC and expecting reset stream after data");
+
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+  Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::UNKNOWN);
+  GPR_ASSERT(response.has_payload());  // data should be received
+
+  gpr_log(GPR_DEBUG, "Done testing reset stream after data");
+  return true;
+}
+
+bool Http2Client::DoRstDuringData() {
+  gpr_log(GPR_DEBUG, "Sending RPC and expecting reset stream during data");
+
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+  Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::UNKNOWN);
+  GPR_ASSERT(!response.has_payload());  // no data should be received
+
+  gpr_log(GPR_DEBUG, "Done testing reset stream during data");
+  return true;
+}
+
+bool Http2Client::DoGoaway() {
+  gpr_log(GPR_DEBUG, "Sending two RPCs and expecting goaway");
+
+  int numCalls = 2;
+  for (int i = 0; i < numCalls; i++) {
+    ClientContext context;
+    SimpleRequest request;
+    SimpleResponse response;
+    request.set_response_size(kLargeResponseSize);
+    grpc::string payload(kLargeRequestSize, '\0');
+    request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+    Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+    AssertStatusCode(s, grpc::StatusCode::OK);
+    GPR_ASSERT(response.payload().body() ==
+               grpc::string(kLargeResponseSize, '\0'));
+  }
+
+  gpr_log(GPR_DEBUG, "Done testing goaway");
+  return true;
+}
+
+bool Http2Client::DoPing() {
+  gpr_log(GPR_DEBUG, "Sending RPC and expecting ping");
+
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+  Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::OK);
+  GPR_ASSERT(response.payload().body() ==
+             grpc::string(kLargeResponseSize, '\0'));
+
+  gpr_log(GPR_DEBUG, "Done testing ping");
+  return true;
+}
+
+void Http2Client::MaxStreamsWorker(std::shared_ptr<grpc::Channel> channel) {
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+  Status s =
+      TestService::NewStub(channel)->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::OK);
+  GPR_ASSERT(response.payload().body() ==
+             grpc::string(kLargeResponseSize, '\0'));
+}
+
+bool Http2Client::DoMaxStreams() {
+  gpr_log(GPR_DEBUG, "Testing max streams");
+
+  // Make an initial call on the channel to ensure the server's max streams
+  // setting is received
+  ClientContext context;
+  SimpleRequest request;
+  SimpleResponse response;
+  request.set_response_size(kLargeResponseSize);
+  grpc::string payload(kLargeRequestSize, '\0');
+  request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+  Status s =
+      TestService::NewStub(channel_)->UnaryCall(&context, request, &response);
+  AssertStatusCode(s, grpc::StatusCode::OK);
+  GPR_ASSERT(response.payload().body() ==
+             grpc::string(kLargeResponseSize, '\0'));
+
+  std::vector<std::thread> test_threads;
+
+  for (int i = 0; i < 10; i++) {
+    test_threads.emplace_back(
+        std::thread(&Http2Client::MaxStreamsWorker, this, channel_));
+  }
+
+  for (auto it = test_threads.begin(); it != test_threads.end(); it++) {
+    it->join();
+  }
+
+  gpr_log(GPR_DEBUG, "Done testing max streams");
+  return true;
+}
+
+}  // namespace testing
+}  // namespace grpc
+
+DEFINE_int32(server_port, 0, "Server port.");
+DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
+DEFINE_string(test_case, "rst_after_header",
+              "Configure different test cases. Valid options are:\n\n"
+              "goaway\n"
+              "max_streams\n"
+              "ping\n"
+              "rst_after_data\n"
+              "rst_after_header\n"
+              "rst_during_data\n");
+
+int main(int argc, char** argv) {
+  grpc::testing::InitTest(&argc, &argv, true);
+  GPR_ASSERT(FLAGS_server_port);
+  const int host_port_buf_size = 1024;
+  char host_port[host_port_buf_size];
+  snprintf(host_port, host_port_buf_size, "%s:%d", FLAGS_server_host.c_str(),
+           FLAGS_server_port);
+  grpc::testing::Http2Client client(grpc::CreateTestChannel(host_port, false));
+  gpr_log(GPR_INFO, "Testing case: %s", FLAGS_test_case.c_str());
+  int ret = 0;
+  if (FLAGS_test_case == "rst_after_header") {
+    client.DoRstAfterHeader();
+  } else if (FLAGS_test_case == "rst_after_data") {
+    client.DoRstAfterData();
+  } else if (FLAGS_test_case == "rst_during_data") {
+    client.DoRstDuringData();
+  } else if (FLAGS_test_case == "goaway") {
+    client.DoGoaway();
+  } else if (FLAGS_test_case == "ping") {
+    client.DoPing();
+  } else if (FLAGS_test_case == "max_streams") {
+    client.DoMaxStreams();
+  } else {
+    const char* testcases[] = {
+        "goaway",         "max_streams",      "ping",
+        "rst_after_data", "rst_after_header", "rst_during_data"};
+    char* joined_testcases =
+        gpr_strjoin_sep(testcases, GPR_ARRAY_SIZE(testcases), "\n", NULL);
+
+    gpr_log(GPR_ERROR, "Unsupported test case %s. Valid options are\n%s",
+            FLAGS_test_case.c_str(), joined_testcases);
+    gpr_free(joined_testcases);
+    ret = 1;
+  }
+
+  return ret;
+}
diff --git a/test/cpp/qps/limit_cores.cc b/test/cpp/interop/http2_client.h
index b5c222542b..6a315f5abb 100644
--- a/test/cpp/qps/limit_cores.cc
+++ b/test/cpp/interop/http2_client.h
@@ -31,57 +31,50 @@
  *
  */
 
-#include "test/cpp/qps/limit_cores.h"
+#ifndef GRPC_TEST_CPP_INTEROP_HTTP2_CLIENT_H
+#define GRPC_TEST_CPP_INTEROP_HTTP2_CLIENT_H
 
-#include <grpc/support/cpu.h>
-#include <grpc/support/log.h>
-#include <grpc/support/port_platform.h>
+#include <memory>
 
-#ifdef GPR_CPU_LINUX
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-#include <sched.h>
+#include <grpc++/channel.h>
+#include <grpc/grpc.h>
+#include "src/proto/grpc/testing/messages.grpc.pb.h"
+#include "src/proto/grpc/testing/test.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
 
-int LimitCores(const int* cores, int cores_size) {
-  const int num_cores = gpr_cpu_num_cores();
-  int cores_set = 0;
+class Http2Client {
+ public:
+  explicit Http2Client(std::shared_ptr<Channel> channel);
+  ~Http2Client() {}
 
-  cpu_set_t* cpup = CPU_ALLOC(num_cores);
-  GPR_ASSERT(cpup);
-  const size_t size = CPU_ALLOC_SIZE(num_cores);
-  CPU_ZERO_S(size, cpup);
+  bool DoRstAfterHeader();
+  bool DoRstAfterData();
+  bool DoRstDuringData();
+  bool DoGoaway();
+  bool DoPing();
+  bool DoMaxStreams();
 
-  if (cores_size > 0) {
-    for (int i = 0; i < cores_size; i++) {
-      if (cores[i] < num_cores) {
-        CPU_SET_S(cores[i], size, cpup);
-        cores_set++;
-      }
-    }
-  } else {
-    for (int i = 0; i < num_cores; i++) {
-      CPU_SET_S(i, size, cpup);
-      cores_set++;
-    }
-  }
-  bool affinity_set = (sched_setaffinity(0, size, cpup) == 0);
-  CPU_FREE(cpup);
-  return affinity_set ? cores_set : num_cores;
-}
+ private:
+  class ServiceStub {
+   public:
+    ServiceStub(std::shared_ptr<Channel> channel);
 
-}  // namespace testing
-}  // namespace grpc
-#else
-namespace grpc {
-namespace testing {
+    TestService::Stub* Get();
+
+   private:
+    std::unique_ptr<TestService::Stub> stub_;
+    std::shared_ptr<Channel> channel_;
+  };
 
-// LimitCores is not currently supported for non-Linux platforms
-int LimitCores(const int*, int) { return gpr_cpu_num_cores(); }
+  void MaxStreamsWorker(std::shared_ptr<grpc::Channel> channel);
+  bool AssertStatusCode(const Status& s, StatusCode expected_code);
+  ServiceStub serviceStub_;
+  std::shared_ptr<Channel> channel_;
+};
 
 }  // namespace testing
 }  // namespace grpc
-#endif
+
+#endif  // GRPC_TEST_CPP_INTEROP_HTTP2_CLIENT_H
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index d1242627ef..b7f2723c39 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -31,7 +31,6 @@
  *
  */
 
-#include <unistd.h>
 #include <cinttypes>
 #include <fstream>
 #include <memory>
@@ -43,6 +42,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/transport/byte_stream.h"
@@ -109,7 +109,10 @@ TestService::Stub* InteropClient::ServiceStub::Get() {
 
 UnimplementedService::Stub*
 InteropClient::ServiceStub::GetUnimplementedServiceStub() {
-  return UnimplementedService::NewStub(channel_).get();
+  if (unimplemented_service_stub_ == nullptr) {
+    unimplemented_service_stub_ = UnimplementedService::NewStub(channel_);
+  }
+  return unimplemented_service_stub_.get();
 }
 
 void InteropClient::ServiceStub::Reset(std::shared_ptr<Channel> channel) {
@@ -615,7 +618,9 @@ bool InteropClient::DoResponseStreamingWithSlowConsumer() {
     GPR_ASSERT(response.payload().body() ==
                grpc::string(kResponseMessageSize, '\0'));
     gpr_log(GPR_DEBUG, "received message %d", i);
-    usleep(kReceiveDelayMilliSeconds * 1000);
+    gpr_sleep_until(gpr_time_add(
+        gpr_now(GPR_CLOCK_REALTIME),
+        gpr_time_from_millis(kReceiveDelayMilliSeconds, GPR_TIMESPAN)));
     ++i;
   }
 
@@ -943,7 +948,7 @@ bool InteropClient::DoCustomMetadata() {
     const auto& server_initial_metadata = context.GetServerInitialMetadata();
     auto iter = server_initial_metadata.find(kEchoInitialMetadataKey);
     GPR_ASSERT(iter != server_initial_metadata.end());
-    GPR_ASSERT(iter->second.data() == kInitialMetadataValue);
+    GPR_ASSERT(iter->second == kInitialMetadataValue);
     const auto& server_trailing_metadata = context.GetServerTrailingMetadata();
     iter = server_trailing_metadata.find(kEchoTrailingBinMetadataKey);
     GPR_ASSERT(iter != server_trailing_metadata.end());
@@ -994,7 +999,7 @@ bool InteropClient::DoCustomMetadata() {
     const auto& server_initial_metadata = context.GetServerInitialMetadata();
     auto iter = server_initial_metadata.find(kEchoInitialMetadataKey);
     GPR_ASSERT(iter != server_initial_metadata.end());
-    GPR_ASSERT(iter->second.data() == kInitialMetadataValue);
+    GPR_ASSERT(iter->second == kInitialMetadataValue);
     const auto& server_trailing_metadata = context.GetServerTrailingMetadata();
     iter = server_trailing_metadata.find(kEchoTrailingBinMetadataKey);
     GPR_ASSERT(iter != server_trailing_metadata.end());
diff --git a/test/cpp/interop/interop_client.h b/test/cpp/interop/interop_client.h
index 7ec7ebee20..74f4db6b78 100644
--- a/test/cpp/interop/interop_client.h
+++ b/test/cpp/interop/interop_client.h
@@ -107,6 +107,7 @@ class InteropClient {
 
    private:
     std::unique_ptr<TestService::Stub> stub_;
+    std::unique_ptr<UnimplementedService::Stub> unimplemented_service_stub_;
     std::shared_ptr<Channel> channel_;
     bool new_stub_every_call_;  // If true, a new stub is returned by every
                                 // Get() call
diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index 67456ce18b..5a810b45ef 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -31,8 +31,6 @@
  *
  */
 
-#include <unistd.h>
-
 #include <fstream>
 #include <memory>
 #include <sstream>
@@ -45,6 +43,7 @@
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/support/string.h"
@@ -56,6 +55,7 @@
 #include "test/cpp/util/test_config.h"
 
 DEFINE_bool(use_tls, false, "Whether to use tls.");
+DEFINE_string(custom_credentials_type, "", "User provided credentials type.");
 DEFINE_int32(port, 0, "Server port.");
 DEFINE_int32(max_send_message_size, -1, "The maximum send message size.");
 
@@ -90,7 +90,9 @@ void MaybeEchoMetadata(ServerContext* context) {
 
   auto iter = client_metadata.find(kEchoInitialMetadataKey);
   if (iter != client_metadata.end()) {
-    context->AddInitialMetadata(kEchoInitialMetadataKey, iter->second.data());
+    context->AddInitialMetadata(
+        kEchoInitialMetadataKey,
+        grpc::string(iter->second.begin(), iter->second.end()));
   }
   iter = client_metadata.find(kEchoTrailingBinMetadataKey);
   if (iter != client_metadata.end()) {
@@ -104,7 +106,9 @@ void MaybeEchoMetadata(ServerContext* context) {
   if (iter != client_metadata.end()) {
     iter = client_metadata.find("user-agent");
     if (iter != client_metadata.end()) {
-      context->AddInitialMetadata(kEchoUserAgentKey, iter->second.data());
+      context->AddInitialMetadata(
+          kEchoUserAgentKey,
+          grpc::string(iter->second.begin(), iter->second.end()));
     }
   }
 }
@@ -345,6 +349,7 @@ void grpc::testing::interop::RunServer(
   std::unique_ptr<Server> server(builder.BuildAndStart());
   gpr_log(GPR_INFO, "Server listening on %s", server_address.str().c_str());
   while (!gpr_atm_no_barrier_load(&g_got_sigint)) {
-    sleep(5);
+    gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                                 gpr_time_from_seconds(5, GPR_TIMESPAN)));
   }
 }
diff --git a/test/cpp/interop/interop_server_bootstrap.cc b/test/cpp/interop/interop_server_bootstrap.cc
index 99518c6943..7cbf221a03 100644
--- a/test/cpp/interop/interop_server_bootstrap.cc
+++ b/test/cpp/interop/interop_server_bootstrap.cc
@@ -32,7 +32,6 @@
  */
 
 #include <signal.h>
-#include <unistd.h>
 
 #include "test/cpp/interop/server_helper.h"
 #include "test/cpp/util/test_config.h"
diff --git a/test/cpp/interop/reconnect_interop_server.cc b/test/cpp/interop/reconnect_interop_server.cc
index 53d51e80e7..634d0a90fc 100644
--- a/test/cpp/interop/reconnect_interop_server.cc
+++ b/test/cpp/interop/reconnect_interop_server.cc
@@ -34,7 +34,6 @@
 // Test description at doc/connection-backoff-interop-test-description.md
 
 #include <signal.h>
-#include <unistd.h>
 
 #include <condition_variable>
 #include <memory>
diff --git a/test/cpp/interop/server_helper.cc b/test/cpp/interop/server_helper.cc
index 8b0b511bcb..d395f50fa5 100644
--- a/test/cpp/interop/server_helper.cc
+++ b/test/cpp/interop/server_helper.cc
@@ -39,23 +39,23 @@
 #include <grpc++/security/server_credentials.h>
 
 #include "src/core/lib/surface/call_test_only.h"
-#include "test/core/end2end/data/ssl_test_data.h"
+#include "test/cpp/util/test_credentials_provider.h"
 
 DECLARE_bool(use_tls);
+DECLARE_string(custom_credentials_type);
 
 namespace grpc {
 namespace testing {
 
 std::shared_ptr<ServerCredentials> CreateInteropServerCredentials() {
-  if (FLAGS_use_tls) {
-    SslServerCredentialsOptions::PemKeyCertPair pkcp = {test_server1_key,
-                                                        test_server1_cert};
-    SslServerCredentialsOptions ssl_opts;
-    ssl_opts.pem_root_certs = "";
-    ssl_opts.pem_key_cert_pairs.push_back(pkcp);
-    return SslServerCredentials(ssl_opts);
+  if (!FLAGS_custom_credentials_type.empty()) {
+    return GetCredentialsProvider()->GetServerCredentials(
+        FLAGS_custom_credentials_type);
+  } else if (FLAGS_use_tls) {
+    return GetCredentialsProvider()->GetServerCredentials(kTlsCredentialsType);
   } else {
-    return InsecureServerCredentials();
+    return GetCredentialsProvider()->GetServerCredentials(
+        kInsecureCredentialsType);
   }
 }
 
diff --git a/test/cpp/interop/stress_test.cc b/test/cpp/interop/stress_test.cc
index 97e658869f..fdc0a613f3 100644
--- a/test/cpp/interop/stress_test.cc
+++ b/test/cpp/interop/stress_test.cc
@@ -45,9 +45,9 @@
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
 #include "src/proto/grpc/testing/metrics.pb.h"
-#include "test/cpp/interop/client_helper.h"
 #include "test/cpp/interop/interop_client.h"
 #include "test/cpp/interop/stress_interop_client.h"
+#include "test/cpp/util/create_test_channel.h"
 #include "test/cpp/util/metrics_server.h"
 #include "test/cpp/util/test_config.h"
 
@@ -67,9 +67,7 @@ DEFINE_int32(test_duration_secs, -1,
              " forcefully terminated.");
 
 DEFINE_string(server_addresses, "localhost:8080",
-              "The list of server"
-              "addresses. This option is ignored if either\n"
-              "server_port or server_host is specified. The format is: \n"
+              "The list of server addresses. The format is: \n"
               " \"<name_1>:<port_1>,<name_2>:<port_1>...<name_N>:<port_N>\"\n"
               " Note: <name> can be servername or IP address.");
 
@@ -80,34 +78,6 @@ DEFINE_int32(num_stubs_per_channel, 1,
              "indicates the max number of parallel RPC calls on each channel "
              "at any given time.");
 
-DEFINE_string(test_case, "",
-              "Configure different test cases. Valid options are:\n\n"
-              "all : all test cases;\n"
-              "cancel_after_begin : cancel stream after starting it;\n"
-              "cancel_after_first_response: cancel on first response;\n"
-              "client_compressed_streaming : compressed request streaming with "
-              "client_compressed_unary : single compressed request;\n"
-              "client_streaming : request streaming with single response;\n"
-              "compute_engine_creds: large_unary with compute engine auth;\n"
-              "custom_metadata: server will echo custom metadata;\n"
-              "empty_stream : bi-di stream with no request/response;\n"
-              "empty_unary : empty (zero bytes) request and response;\n"
-              "half_duplex : half-duplex streaming;\n"
-              "jwt_token_creds: large_unary with JWT token auth;\n"
-              "large_unary : single request and (large) response;\n"
-              "oauth2_auth_token: raw oauth2 access token auth;\n"
-              "per_rpc_creds: raw oauth2 access token on a single rpc;\n"
-              "ping_pong : full-duplex streaming;\n"
-              "response streaming;\n"
-              "server_compressed_streaming : single request with compressed "
-              "server_compressed_unary : single compressed response;\n"
-              "server_streaming : single request with response streaming;\n"
-              "slow_consumer : single request with response streaming with "
-              "slow client consumer;\n"
-              "status_code_and_message: verify status code & message;\n"
-              "timeout_on_sleeping_server: deadline exceeds on stream;\n"
-              "unimplemented_method: client calls an unimplemented_method;\n");
-
 // TODO(sreek): Add more test cases here in future
 DEFINE_string(test_cases, "",
               "List of test cases to call along with the"
@@ -148,12 +118,8 @@ DEFINE_bool(do_not_abort_on_transient_failures, true,
 // TODO(sreek): Consolidate overlapping options
 DEFINE_bool(use_tls, false, "Whether to use tls.");
 DEFINE_bool(use_test_ca, false, "False to use SSL roots for google");
-DEFINE_int32(server_port, 0, "Server port.");
-DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
 DEFINE_string(server_host_override, "foo.test.google.fr",
               "Override the server host which is sent in HTTP header");
-DEFINE_string(service_account_key_file, "",
-              "Path to service account json key file.");
 
 using grpc::testing::kTestCaseList;
 using grpc::testing::MetricsService;
@@ -240,8 +206,6 @@ bool ParseTestCasesString(const grpc::string& test_cases,
 void LogParameterInfo(const std::vector<grpc::string>& addresses,
                       const std::vector<std::pair<TestCaseType, int>>& tests) {
   gpr_log(GPR_INFO, "server_addresses: %s", FLAGS_server_addresses.c_str());
-  gpr_log(GPR_INFO, "server_host: %s", FLAGS_server_host.c_str());
-  gpr_log(GPR_INFO, "server_port: %d", FLAGS_server_port);
   gpr_log(GPR_INFO, "test_cases : %s", FLAGS_test_cases.c_str());
   gpr_log(GPR_INFO, "sleep_duration_ms: %d", FLAGS_sleep_duration_ms);
   gpr_log(GPR_INFO, "test_duration_secs: %d", FLAGS_test_duration_secs);
@@ -285,24 +249,11 @@ int main(int argc, char** argv) {
 
   // Parse the server addresses
   std::vector<grpc::string> server_addresses;
-  if (FLAGS_server_port != 0) {
-    // We are using interop_client style cmdline options.
-    const int host_port_buf_size = 1024;
-    char host_port[host_port_buf_size];
-    snprintf(host_port, host_port_buf_size, "%s:%d", FLAGS_server_host.c_str(),
-             FLAGS_server_port);
-    std::string host_port_str(host_port);
-    ParseCommaDelimitedString(host_port_str, server_addresses);
-  } else {
-    ParseCommaDelimitedString(FLAGS_server_addresses, server_addresses);
-  }
+  ParseCommaDelimitedString(FLAGS_server_addresses, server_addresses);
 
   // Parse test cases and weights
   if (FLAGS_test_cases.length() == 0) {
-    // We are using interop_client style test_case option
-    FLAGS_test_cases = FLAGS_test_case + ":100";
-  } else if (FLAGS_test_case != "") {
-    gpr_log(GPR_ERROR, "specify --test_case or --test_cases but not both.");
+    gpr_log(GPR_ERROR, "No test cases supplied");
     return 1;
   }
 
@@ -340,12 +291,8 @@ int main(int argc, char** argv) {
          channel_idx++) {
       gpr_log(GPR_INFO, "Starting test with %s channel_idx=%d..", it->c_str(),
               channel_idx);
-      std::shared_ptr<grpc::Channel> channel;
-      if (FLAGS_use_tls) {
-        channel = grpc::testing::CreateChannelForTestCase(FLAGS_test_case);
-      } else {
-        channel = grpc::CreateChannel(*it, grpc::InsecureChannelCredentials());
-      }
+      std::shared_ptr<grpc::Channel> channel = grpc::CreateTestChannel(
+          *it, FLAGS_server_host_override, FLAGS_use_tls, !FLAGS_use_test_ca);
 
       // Create stub(s) for each channel
       for (int stub_idx = 0; stub_idx < FLAGS_num_stubs_per_channel;
diff --git a/test/cpp/microbenchmarks/bm_fullstack.cc b/test/cpp/microbenchmarks/bm_fullstack.cc
index 6c0bf80488..9d883e68d7 100644
--- a/test/cpp/microbenchmarks/bm_fullstack.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack.cc
@@ -54,9 +54,11 @@ extern "C" {
 #include "src/core/lib/surface/channel.h"
 #include "src/core/lib/surface/completion_queue.h"
 #include "src/core/lib/surface/server.h"
+#include "test/core/util/memory_counters.h"
 #include "test/core/util/passthru_endpoint.h"
 #include "test/core/util/port.h"
 }
+#include "src/core/lib/profiling/timers.h"
 #include "src/cpp/client/create_channel_internal.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "third_party/benchmark/include/benchmark/benchmark.h"
@@ -67,6 +69,7 @@ namespace testing {
 static class InitializeStuff {
  public:
   InitializeStuff() {
+    grpc_memory_counters_init();
     init_lib_.init();
     rq_ = grpc_resource_quota_create("bm");
   }
@@ -84,15 +87,63 @@ static class InitializeStuff {
  * FIXTURES
  */
 
-class FullstackFixture {
+static void ApplyCommonServerBuilderConfig(ServerBuilder* b) {
+  b->SetMaxReceiveMessageSize(INT_MAX);
+  b->SetMaxSendMessageSize(INT_MAX);
+}
+
+static void ApplyCommonChannelArguments(ChannelArguments* c) {
+  c->SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, INT_MAX);
+  c->SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, INT_MAX);
+}
+
+#ifdef GPR_MU_COUNTERS
+extern "C" gpr_atm grpc_mu_locks;
+#endif
+
+class BaseFixture {
+ public:
+  void Finish(benchmark::State& s) {
+    std::ostringstream out;
+    this->AddToLabel(out, s);
+#ifdef GPR_MU_COUNTERS
+    out << " locks/iter:" << ((double)(gpr_atm_no_barrier_load(&grpc_mu_locks) -
+                                       mu_locks_at_start_) /
+                              (double)s.iterations());
+#endif
+    grpc_memory_counters counters_at_end = grpc_memory_counters_snapshot();
+    out << " allocs/iter:"
+        << ((double)(counters_at_end.total_allocs_absolute -
+                     counters_at_start_.total_allocs_absolute) /
+            (double)s.iterations());
+    auto label = out.str();
+    if (label.length() && label[0] == ' ') {
+      label = label.substr(1);
+    }
+    s.SetLabel(label);
+  }
+
+  virtual void AddToLabel(std::ostream& out, benchmark::State& s) = 0;
+
+ private:
+#ifdef GPR_MU_COUNTERS
+  const size_t mu_locks_at_start_ = gpr_atm_no_barrier_load(&grpc_mu_locks);
+#endif
+  grpc_memory_counters counters_at_start_ = grpc_memory_counters_snapshot();
+};
+
+class FullstackFixture : public BaseFixture {
  public:
   FullstackFixture(Service* service, const grpc::string& address) {
     ServerBuilder b;
     b.AddListeningPort(address, InsecureServerCredentials());
     cq_ = b.AddCompletionQueue(true);
     b.RegisterService(service);
+    ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
-    channel_ = CreateChannel(address, InsecureChannelCredentials());
+    ChannelArguments args;
+    ApplyCommonChannelArguments(&args);
+    channel_ = CreateCustomChannel(address, InsecureChannelCredentials(), args);
   }
 
   virtual ~FullstackFixture() {
@@ -117,6 +168,8 @@ class TCP : public FullstackFixture {
  public:
   TCP(Service* service) : FullstackFixture(service, MakeAddress()) {}
 
+  void AddToLabel(std::ostream& out, benchmark::State& state) {}
+
  private:
   static grpc::string MakeAddress() {
     int port = grpc_pick_unused_port_or_die();
@@ -130,6 +183,8 @@ class UDS : public FullstackFixture {
  public:
   UDS(Service* service) : FullstackFixture(service, MakeAddress()) {}
 
+  void AddToLabel(std::ostream& out, benchmark::State& state) override {}
+
  private:
   static grpc::string MakeAddress() {
     int port = grpc_pick_unused_port_or_die();  // just for a unique id - not a
@@ -140,12 +195,13 @@ class UDS : public FullstackFixture {
   }
 };
 
-class EndpointPairFixture {
+class EndpointPairFixture : public BaseFixture {
  public:
   EndpointPairFixture(Service* service, grpc_endpoint_pair endpoints) {
     ServerBuilder b;
     cq_ = b.AddCompletionQueue(true);
     b.RegisterService(service);
+    ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
 
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
@@ -174,6 +230,7 @@ class EndpointPairFixture {
     {
       ChannelArguments args;
       args.SetString(GRPC_ARG_DEFAULT_AUTHORITY, "test.authority");
+      ApplyCommonChannelArguments(&args);
 
       grpc_channel_args c_args = args.c_channel_args();
       grpc_transport* transport =
@@ -213,6 +270,8 @@ class SockPair : public EndpointPairFixture {
       : EndpointPairFixture(service, grpc_iomgr_create_endpoint_pair(
                                          "test", initialize_stuff.rq(), 8192)) {
   }
+
+  void AddToLabel(std::ostream& out, benchmark::State& state) {}
 };
 
 class InProcessCHTTP2 : public EndpointPairFixture {
@@ -220,10 +279,18 @@ class InProcessCHTTP2 : public EndpointPairFixture {
   InProcessCHTTP2(Service* service)
       : EndpointPairFixture(service, MakeEndpoints()) {}
 
+  void AddToLabel(std::ostream& out, benchmark::State& state) {
+    out << " writes/iter:"
+        << ((double)stats_.num_writes / (double)state.iterations());
+  }
+
  private:
+  grpc_passthru_endpoint_stats stats_;
+
   grpc_endpoint_pair MakeEndpoints() {
     grpc_endpoint_pair p;
-    grpc_passthru_endpoint_create(&p.client, &p.server, initialize_stuff.rq());
+    grpc_passthru_endpoint_create(&p.client, &p.server, initialize_stuff.rq(),
+                                  &stats_);
     return p;
   }
 };
@@ -343,6 +410,12 @@ static void BM_UnaryPingPong(benchmark::State& state) {
   EchoRequest send_request;
   EchoResponse send_response;
   EchoResponse recv_response;
+  if (state.range(0) > 0) {
+    send_request.set_message(std::string(state.range(0), 'a'));
+  }
+  if (state.range(1) > 0) {
+    send_response.set_message(std::string(state.range(1), 'a'));
+  }
   Status recv_status;
   struct ServerEnv {
     ServerContext ctx;
@@ -365,6 +438,8 @@ static void BM_UnaryPingPong(benchmark::State& state) {
   std::unique_ptr<EchoTestService::Stub> stub(
       EchoTestService::NewStub(fixture->channel()));
   while (state.KeepRunning()) {
+    GPR_TIMER_SCOPE("BenchmarkCycle", 0);
+    recv_response.Clear();
     ClientContext cli_ctx;
     ClientContextMutator cli_ctx_mut(&cli_ctx);
     std::unique_ptr<ClientAsyncResponseReader<EchoResponse>> response_reader(
@@ -393,56 +468,429 @@ static void BM_UnaryPingPong(benchmark::State& state) {
     service.RequestEcho(&senv->ctx, &senv->recv_request, &senv->response_writer,
                         fixture->cq(), fixture->cq(), tag(slot));
   }
+  fixture->Finish(state);
   fixture.reset();
   server_env[0]->~ServerEnv();
   server_env[1]->~ServerEnv();
+  state.SetBytesProcessed(state.range(0) * state.iterations() +
+                          state.range(1) * state.iterations());
+}
+
+// Repeatedly makes Streaming Bidi calls (exchanging a configurable number of
+// messages in each call) in a loop on a single channel
+//
+//  First parmeter (i.e state.range(0)):  Message size (in bytes) to use
+//  Second parameter (i.e state.range(1)): Number of ping pong messages.
+//      Note: One ping-pong means two messages (one from client to server and
+//      the other from server to client):
+template <class Fixture, class ClientContextMutator, class ServerContextMutator>
+static void BM_StreamingPingPong(benchmark::State& state) {
+  const int msg_size = state.range(0);
+  const int max_ping_pongs = state.range(1);
+
+  EchoTestService::AsyncService service;
+  std::unique_ptr<Fixture> fixture(new Fixture(&service));
+  {
+    EchoResponse send_response;
+    EchoResponse recv_response;
+    EchoRequest send_request;
+    EchoRequest recv_request;
+
+    if (msg_size > 0) {
+      send_request.set_message(std::string(msg_size, 'a'));
+      send_response.set_message(std::string(msg_size, 'b'));
+    }
+
+    std::unique_ptr<EchoTestService::Stub> stub(
+        EchoTestService::NewStub(fixture->channel()));
+
+    while (state.KeepRunning()) {
+      ServerContext svr_ctx;
+      ServerContextMutator svr_ctx_mut(&svr_ctx);
+      ServerAsyncReaderWriter<EchoResponse, EchoRequest> response_rw(&svr_ctx);
+      service.RequestBidiStream(&svr_ctx, &response_rw, fixture->cq(),
+                                fixture->cq(), tag(0));
+
+      ClientContext cli_ctx;
+      ClientContextMutator cli_ctx_mut(&cli_ctx);
+      auto request_rw = stub->AsyncBidiStream(&cli_ctx, fixture->cq(), tag(1));
+
+      // Establish async stream between client side and server side
+      void* t;
+      bool ok;
+      int need_tags = (1 << 0) | (1 << 1);
+      while (need_tags) {
+        GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+        GPR_ASSERT(ok);
+        int i = (int)(intptr_t)t;
+        GPR_ASSERT(need_tags & (1 << i));
+        need_tags &= ~(1 << i);
+      }
+
+      // Send 'max_ping_pongs' number of ping pong messages
+      int ping_pong_cnt = 0;
+      while (ping_pong_cnt < max_ping_pongs) {
+        request_rw->Write(send_request, tag(0));   // Start client send
+        response_rw.Read(&recv_request, tag(1));   // Start server recv
+        request_rw->Read(&recv_response, tag(2));  // Start client recv
+
+        need_tags = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3);
+        while (need_tags) {
+          GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+          GPR_ASSERT(ok);
+          int i = (int)(intptr_t)t;
+
+          // If server recv is complete, start the server send operation
+          if (i == 1) {
+            response_rw.Write(send_response, tag(3));
+          }
+
+          GPR_ASSERT(need_tags & (1 << i));
+          need_tags &= ~(1 << i);
+        }
+
+        ping_pong_cnt++;
+      }
+
+      request_rw->WritesDone(tag(0));
+      response_rw.Finish(Status::OK, tag(1));
+
+      Status recv_status;
+      request_rw->Finish(&recv_status, tag(2));
+
+      need_tags = (1 << 0) | (1 << 1) | (1 << 2);
+      while (need_tags) {
+        GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+        int i = (int)(intptr_t)t;
+        GPR_ASSERT(need_tags & (1 << i));
+        need_tags &= ~(1 << i);
+      }
+
+      GPR_ASSERT(recv_status.ok());
+    }
+  }
+
+  fixture->Finish(state);
+  fixture.reset();
+  state.SetBytesProcessed(msg_size * state.iterations() * max_ping_pongs * 2);
+}
+
+// Repeatedly sends ping pong messages in a single streaming Bidi call in a loop
+//     First parmeter (i.e state.range(0)):  Message size (in bytes) to use
+template <class Fixture, class ClientContextMutator, class ServerContextMutator>
+static void BM_StreamingPingPongMsgs(benchmark::State& state) {
+  const int msg_size = state.range(0);
+
+  EchoTestService::AsyncService service;
+  std::unique_ptr<Fixture> fixture(new Fixture(&service));
+  {
+    EchoResponse send_response;
+    EchoResponse recv_response;
+    EchoRequest send_request;
+    EchoRequest recv_request;
+
+    if (msg_size > 0) {
+      send_request.set_message(std::string(msg_size, 'a'));
+      send_response.set_message(std::string(msg_size, 'b'));
+    }
+
+    std::unique_ptr<EchoTestService::Stub> stub(
+        EchoTestService::NewStub(fixture->channel()));
+
+    ServerContext svr_ctx;
+    ServerContextMutator svr_ctx_mut(&svr_ctx);
+    ServerAsyncReaderWriter<EchoResponse, EchoRequest> response_rw(&svr_ctx);
+    service.RequestBidiStream(&svr_ctx, &response_rw, fixture->cq(),
+                              fixture->cq(), tag(0));
+
+    ClientContext cli_ctx;
+    ClientContextMutator cli_ctx_mut(&cli_ctx);
+    auto request_rw = stub->AsyncBidiStream(&cli_ctx, fixture->cq(), tag(1));
+
+    // Establish async stream between client side and server side
+    void* t;
+    bool ok;
+    int need_tags = (1 << 0) | (1 << 1);
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      GPR_ASSERT(ok);
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+
+    while (state.KeepRunning()) {
+      request_rw->Write(send_request, tag(0));   // Start client send
+      response_rw.Read(&recv_request, tag(1));   // Start server recv
+      request_rw->Read(&recv_response, tag(2));  // Start client recv
+
+      need_tags = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3);
+      while (need_tags) {
+        GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+        GPR_ASSERT(ok);
+        int i = (int)(intptr_t)t;
+
+        // If server recv is complete, start the server send operation
+        if (i == 1) {
+          response_rw.Write(send_response, tag(3));
+        }
+
+        GPR_ASSERT(need_tags & (1 << i));
+        need_tags &= ~(1 << i);
+      }
+    }
+
+    request_rw->WritesDone(tag(0));
+    response_rw.Finish(Status::OK, tag(1));
+    Status recv_status;
+    request_rw->Finish(&recv_status, tag(2));
+
+    need_tags = (1 << 0) | (1 << 1) | (1 << 2);
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+
+    GPR_ASSERT(recv_status.ok());
+  }
+
+  fixture->Finish(state);
+  fixture.reset();
+  state.SetBytesProcessed(msg_size * state.iterations() * 2);
+}
+
+template <class Fixture>
+static void BM_PumpStreamClientToServer(benchmark::State& state) {
+  EchoTestService::AsyncService service;
+  std::unique_ptr<Fixture> fixture(new Fixture(&service));
+  {
+    EchoRequest send_request;
+    EchoRequest recv_request;
+    if (state.range(0) > 0) {
+      send_request.set_message(std::string(state.range(0), 'a'));
+    }
+    Status recv_status;
+    ServerContext svr_ctx;
+    ServerAsyncReaderWriter<EchoResponse, EchoRequest> response_rw(&svr_ctx);
+    service.RequestBidiStream(&svr_ctx, &response_rw, fixture->cq(),
+                              fixture->cq(), tag(0));
+    std::unique_ptr<EchoTestService::Stub> stub(
+        EchoTestService::NewStub(fixture->channel()));
+    ClientContext cli_ctx;
+    auto request_rw = stub->AsyncBidiStream(&cli_ctx, fixture->cq(), tag(1));
+    int need_tags = (1 << 0) | (1 << 1);
+    void* t;
+    bool ok;
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      GPR_ASSERT(ok);
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+    response_rw.Read(&recv_request, tag(0));
+    while (state.KeepRunning()) {
+      GPR_TIMER_SCOPE("BenchmarkCycle", 0);
+      request_rw->Write(send_request, tag(1));
+      while (true) {
+        GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+        if (t == tag(0)) {
+          response_rw.Read(&recv_request, tag(0));
+        } else if (t == tag(1)) {
+          break;
+        } else {
+          GPR_ASSERT(false);
+        }
+      }
+    }
+    request_rw->WritesDone(tag(1));
+    need_tags = (1 << 0) | (1 << 1);
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+  }
+  fixture->Finish(state);
+  fixture.reset();
+  state.SetBytesProcessed(state.range(0) * state.iterations());
+}
+
+template <class Fixture>
+static void BM_PumpStreamServerToClient(benchmark::State& state) {
+  EchoTestService::AsyncService service;
+  std::unique_ptr<Fixture> fixture(new Fixture(&service));
+  {
+    EchoResponse send_response;
+    EchoResponse recv_response;
+    if (state.range(0) > 0) {
+      send_response.set_message(std::string(state.range(0), 'a'));
+    }
+    Status recv_status;
+    ServerContext svr_ctx;
+    ServerAsyncReaderWriter<EchoResponse, EchoRequest> response_rw(&svr_ctx);
+    service.RequestBidiStream(&svr_ctx, &response_rw, fixture->cq(),
+                              fixture->cq(), tag(0));
+    std::unique_ptr<EchoTestService::Stub> stub(
+        EchoTestService::NewStub(fixture->channel()));
+    ClientContext cli_ctx;
+    auto request_rw = stub->AsyncBidiStream(&cli_ctx, fixture->cq(), tag(1));
+    int need_tags = (1 << 0) | (1 << 1);
+    void* t;
+    bool ok;
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      GPR_ASSERT(ok);
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+    request_rw->Read(&recv_response, tag(0));
+    while (state.KeepRunning()) {
+      GPR_TIMER_SCOPE("BenchmarkCycle", 0);
+      response_rw.Write(send_response, tag(1));
+      while (true) {
+        GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+        if (t == tag(0)) {
+          request_rw->Read(&recv_response, tag(0));
+        } else if (t == tag(1)) {
+          break;
+        } else {
+          GPR_ASSERT(false);
+        }
+      }
+    }
+    response_rw.Finish(Status::OK, tag(1));
+    need_tags = (1 << 0) | (1 << 1);
+    while (need_tags) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      int i = (int)(intptr_t)t;
+      GPR_ASSERT(need_tags & (1 << i));
+      need_tags &= ~(1 << i);
+    }
+  }
+  fixture->Finish(state);
+  fixture.reset();
+  state.SetBytesProcessed(state.range(0) * state.iterations());
 }
 
 /*******************************************************************************
  * CONFIGURATIONS
  */
 
-BENCHMARK_TEMPLATE(BM_UnaryPingPong, TCP, NoOpMutator, NoOpMutator);
-BENCHMARK_TEMPLATE(BM_UnaryPingPong, UDS, NoOpMutator, NoOpMutator);
-BENCHMARK_TEMPLATE(BM_UnaryPingPong, SockPair, NoOpMutator, NoOpMutator);
-BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator, NoOpMutator);
+static void SweepSizesArgs(benchmark::internal::Benchmark* b) {
+  b->Args({0, 0});
+  for (int i = 1; i <= 128 * 1024 * 1024; i *= 8) {
+    b->Args({i, 0});
+    b->Args({0, i});
+    b->Args({i, i});
+  }
+}
+
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, TCP, NoOpMutator, NoOpMutator)
+    ->Apply(SweepSizesArgs);
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, UDS, NoOpMutator, NoOpMutator)
+    ->Args({0, 0});
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, SockPair, NoOpMutator, NoOpMutator)
+    ->Args({0, 0});
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator, NoOpMutator)
+    ->Apply(SweepSizesArgs);
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomBinaryMetadata<10>, 1>,
-                   NoOpMutator);
+                   Client_AddMetadata<RandomBinaryMetadata<10>, 1>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomBinaryMetadata<31>, 1>,
-                   NoOpMutator);
+                   Client_AddMetadata<RandomBinaryMetadata<31>, 1>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
                    Client_AddMetadata<RandomBinaryMetadata<100>, 1>,
-                   NoOpMutator);
+                   NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomBinaryMetadata<10>, 2>,
-                   NoOpMutator);
+                   Client_AddMetadata<RandomBinaryMetadata<10>, 2>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomBinaryMetadata<31>, 2>,
-                   NoOpMutator);
+                   Client_AddMetadata<RandomBinaryMetadata<31>, 2>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
                    Client_AddMetadata<RandomBinaryMetadata<100>, 2>,
-                   NoOpMutator);
+                   NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomBinaryMetadata<10>, 1>);
+                   Server_AddInitialMetadata<RandomBinaryMetadata<10>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomBinaryMetadata<31>, 1>);
+                   Server_AddInitialMetadata<RandomBinaryMetadata<31>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomBinaryMetadata<100>, 1>);
+                   Server_AddInitialMetadata<RandomBinaryMetadata<100>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomAsciiMetadata<10>, 1>, NoOpMutator);
+                   Client_AddMetadata<RandomAsciiMetadata<10>, 1>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomAsciiMetadata<31>, 1>, NoOpMutator);
+                   Client_AddMetadata<RandomAsciiMetadata<31>, 1>, NoOpMutator)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2,
-                   Client_AddMetadata<RandomAsciiMetadata<100>, 1>,
-                   NoOpMutator);
+                   Client_AddMetadata<RandomAsciiMetadata<100>, 1>, NoOpMutator)
+    ->Args({0, 0});
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
+                   Server_AddInitialMetadata<RandomAsciiMetadata<10>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomAsciiMetadata<10>, 1>);
+                   Server_AddInitialMetadata<RandomAsciiMetadata<31>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomAsciiMetadata<31>, 1>);
+                   Server_AddInitialMetadata<RandomAsciiMetadata<100>, 1>)
+    ->Args({0, 0});
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
-                   Server_AddInitialMetadata<RandomAsciiMetadata<100>, 1>);
+                   Server_AddInitialMetadata<RandomAsciiMetadata<10>, 100>)
+    ->Args({0, 0});
+
+BENCHMARK_TEMPLATE(BM_PumpStreamClientToServer, TCP)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamClientToServer, UDS)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamClientToServer, SockPair)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamClientToServer, InProcessCHTTP2)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamServerToClient, TCP)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamServerToClient, UDS)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamServerToClient, SockPair)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_PumpStreamServerToClient, InProcessCHTTP2)
+    ->Range(0, 128 * 1024 * 1024);
+
+// Generate Args for StreamingPingPong benchmarks. Currently generates args for
+// only "small streams" (i.e streams with 0, 1 or 2 messages)
+static void StreamingPingPongArgs(benchmark::internal::Benchmark* b) {
+  int msg_size = 0;
+
+  b->Args({0, 0});  // spl case: 0 ping-pong msgs (msg_size doesn't matter here)
+
+  for (msg_size = 0; msg_size <= 128 * 1024 * 1024;
+       msg_size == 0 ? msg_size++ : msg_size *= 8) {
+    b->Args({msg_size, 1});
+    b->Args({msg_size, 2});
+  }
+}
+
+BENCHMARK_TEMPLATE(BM_StreamingPingPong, InProcessCHTTP2, NoOpMutator,
+                   NoOpMutator)
+    ->Apply(StreamingPingPongArgs);
+BENCHMARK_TEMPLATE(BM_StreamingPingPong, TCP, NoOpMutator, NoOpMutator)
+    ->Apply(StreamingPingPongArgs);
+
+BENCHMARK_TEMPLATE(BM_StreamingPingPongMsgs, InProcessCHTTP2, NoOpMutator,
+                   NoOpMutator)
+    ->Range(0, 128 * 1024 * 1024);
+BENCHMARK_TEMPLATE(BM_StreamingPingPongMsgs, TCP, NoOpMutator, NoOpMutator)
+    ->Range(0, 128 * 1024 * 1024);
 
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/cpp/performance/writes_per_rpc_test.cc b/test/cpp/performance/writes_per_rpc_test.cc
new file mode 100644
index 0000000000..7a914c1547
--- /dev/null
+++ b/test/cpp/performance/writes_per_rpc_test.cc
@@ -0,0 +1,268 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/channel.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/impl/grpc_library.h>
+#include <grpc++/security/credentials.h>
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc/support/log.h>
+#include <gtest/gtest.h>
+
+extern "C" {
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/endpoint_pair.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/surface/completion_queue.h"
+#include "src/core/lib/surface/server.h"
+#include "test/core/util/passthru_endpoint.h"
+#include "test/core/util/port.h"
+}
+#include "src/cpp/client/create_channel_internal.h"
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc {
+namespace testing {
+
+static void* tag(intptr_t x) { return reinterpret_cast<void*>(x); }
+
+static void ApplyCommonServerBuilderConfig(ServerBuilder* b) {
+  b->SetMaxReceiveMessageSize(INT_MAX);
+  b->SetMaxSendMessageSize(INT_MAX);
+}
+
+static void ApplyCommonChannelArguments(ChannelArguments* c) {
+  c->SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, INT_MAX);
+  c->SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, INT_MAX);
+}
+
+static class InitializeStuff {
+ public:
+  InitializeStuff() {
+    init_lib_.init();
+    rq_ = grpc_resource_quota_create("bm");
+  }
+
+  ~InitializeStuff() { init_lib_.shutdown(); }
+
+  grpc_resource_quota* rq() { return rq_; }
+
+ private:
+  internal::GrpcLibrary init_lib_;
+  grpc_resource_quota* rq_;
+} initialize_stuff;
+
+class EndpointPairFixture {
+ public:
+  EndpointPairFixture(Service* service, grpc_endpoint_pair endpoints) {
+    ServerBuilder b;
+    cq_ = b.AddCompletionQueue(true);
+    b.RegisterService(service);
+    ApplyCommonServerBuilderConfig(&b);
+    server_ = b.BuildAndStart();
+
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+    /* add server endpoint to server_ */
+    {
+      const grpc_channel_args* server_args =
+          grpc_server_get_channel_args(server_->c_server());
+      grpc_transport* transport = grpc_create_chttp2_transport(
+          &exec_ctx, server_args, endpoints.server, 0 /* is_client */);
+
+      grpc_pollset** pollsets;
+      size_t num_pollsets = 0;
+      grpc_server_get_pollsets(server_->c_server(), &pollsets, &num_pollsets);
+
+      for (size_t i = 0; i < num_pollsets; i++) {
+        grpc_endpoint_add_to_pollset(&exec_ctx, endpoints.server, pollsets[i]);
+      }
+
+      grpc_server_setup_transport(&exec_ctx, server_->c_server(), transport,
+                                  NULL, server_args);
+      grpc_chttp2_transport_start_reading(&exec_ctx, transport, NULL);
+    }
+
+    /* create channel */
+    {
+      ChannelArguments args;
+      args.SetString(GRPC_ARG_DEFAULT_AUTHORITY, "test.authority");
+      ApplyCommonChannelArguments(&args);
+
+      grpc_channel_args c_args = args.c_channel_args();
+      grpc_transport* transport =
+          grpc_create_chttp2_transport(&exec_ctx, &c_args, endpoints.client, 1);
+      GPR_ASSERT(transport);
+      grpc_channel* channel = grpc_channel_create(
+          &exec_ctx, "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+      grpc_chttp2_transport_start_reading(&exec_ctx, transport, NULL);
+
+      channel_ = CreateChannelInternal("", channel);
+    }
+
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
+
+  virtual ~EndpointPairFixture() {
+    server_->Shutdown();
+    cq_->Shutdown();
+    void* tag;
+    bool ok;
+    while (cq_->Next(&tag, &ok)) {
+    }
+  }
+
+  ServerCompletionQueue* cq() { return cq_.get(); }
+  std::shared_ptr<Channel> channel() { return channel_; }
+
+ private:
+  std::unique_ptr<Server> server_;
+  std::unique_ptr<ServerCompletionQueue> cq_;
+  std::shared_ptr<Channel> channel_;
+};
+
+class InProcessCHTTP2 : public EndpointPairFixture {
+ public:
+  InProcessCHTTP2(Service* service)
+      : EndpointPairFixture(service, MakeEndpoints()) {}
+
+  int writes_performed() const { return stats_.num_writes; }
+
+ private:
+  grpc_passthru_endpoint_stats stats_;
+
+  grpc_endpoint_pair MakeEndpoints() {
+    grpc_endpoint_pair p;
+    grpc_passthru_endpoint_create(&p.client, &p.server, initialize_stuff.rq(),
+                                  &stats_);
+    return p;
+  }
+};
+
+static double UnaryPingPong(int request_size, int response_size) {
+  const int kIterations = 10000;
+
+  EchoTestService::AsyncService service;
+  std::unique_ptr<InProcessCHTTP2> fixture(new InProcessCHTTP2(&service));
+  EchoRequest send_request;
+  EchoResponse send_response;
+  EchoResponse recv_response;
+  if (request_size > 0) {
+    send_request.set_message(std::string(request_size, 'a'));
+  }
+  if (response_size > 0) {
+    send_response.set_message(std::string(response_size, 'a'));
+  }
+  Status recv_status;
+  struct ServerEnv {
+    ServerContext ctx;
+    EchoRequest recv_request;
+    grpc::ServerAsyncResponseWriter<EchoResponse> response_writer;
+    ServerEnv() : response_writer(&ctx) {}
+  };
+  uint8_t server_env_buffer[2 * sizeof(ServerEnv)];
+  ServerEnv* server_env[2] = {
+      reinterpret_cast<ServerEnv*>(server_env_buffer),
+      reinterpret_cast<ServerEnv*>(server_env_buffer + sizeof(ServerEnv))};
+  new (server_env[0]) ServerEnv;
+  new (server_env[1]) ServerEnv;
+  service.RequestEcho(&server_env[0]->ctx, &server_env[0]->recv_request,
+                      &server_env[0]->response_writer, fixture->cq(),
+                      fixture->cq(), tag(0));
+  service.RequestEcho(&server_env[1]->ctx, &server_env[1]->recv_request,
+                      &server_env[1]->response_writer, fixture->cq(),
+                      fixture->cq(), tag(1));
+  std::unique_ptr<EchoTestService::Stub> stub(
+      EchoTestService::NewStub(fixture->channel()));
+  for (int iteration = 0; iteration < kIterations; iteration++) {
+    recv_response.Clear();
+    ClientContext cli_ctx;
+    std::unique_ptr<ClientAsyncResponseReader<EchoResponse>> response_reader(
+        stub->AsyncEcho(&cli_ctx, send_request, fixture->cq()));
+    void* t;
+    bool ok;
+    GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+    GPR_ASSERT(ok);
+    GPR_ASSERT(t == tag(0) || t == tag(1));
+    intptr_t slot = reinterpret_cast<intptr_t>(t);
+    ServerEnv* senv = server_env[slot];
+    senv->response_writer.Finish(send_response, Status::OK, tag(3));
+    response_reader->Finish(&recv_response, &recv_status, tag(4));
+    for (int i = (1 << 3) | (1 << 4); i != 0;) {
+      GPR_ASSERT(fixture->cq()->Next(&t, &ok));
+      GPR_ASSERT(ok);
+      int tagnum = (int)reinterpret_cast<intptr_t>(t);
+      GPR_ASSERT(i & (1 << tagnum));
+      i -= 1 << tagnum;
+    }
+    GPR_ASSERT(recv_status.ok());
+
+    senv->~ServerEnv();
+    senv = new (senv) ServerEnv();
+    service.RequestEcho(&senv->ctx, &senv->recv_request, &senv->response_writer,
+                        fixture->cq(), fixture->cq(), tag(slot));
+  }
+
+  double writes_per_iteration =
+      (double)fixture->writes_performed() / (double)kIterations;
+
+  fixture.reset();
+  server_env[0]->~ServerEnv();
+  server_env[1]->~ServerEnv();
+
+  return writes_per_iteration;
+}
+
+TEST(WritesPerRpcTest, UnaryPingPong) {
+  EXPECT_LT(UnaryPingPong(0, 0), 2.05);
+  EXPECT_LT(UnaryPingPong(1, 0), 2.05);
+  EXPECT_LT(UnaryPingPong(0, 1), 2.05);
+  EXPECT_LT(UnaryPingPong(4096, 0), 2.2);
+  EXPECT_LT(UnaryPingPong(0, 4096), 2.2);
+}
+
+}  // namespace testing
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/cpp/qps/client.h b/test/cpp/qps/client.h
index fdd78ebb89..baa9304cc2 100644
--- a/test/cpp/qps/client.h
+++ b/test/cpp/qps/client.h
@@ -51,7 +51,6 @@
 
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/interarrival.h"
-#include "test/cpp/qps/limit_cores.h"
 #include "test/cpp/qps/usage_timer.h"
 #include "test/cpp/util/create_test_channel.h"
 
@@ -374,7 +373,7 @@ class ClientImpl : public Client {
   ClientImpl(const ClientConfig& config,
              std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
                  create_stub)
-      : cores_(LimitCores(config.core_list().data(), config.core_list_size())),
+      : cores_(gpr_cpu_num_cores()),
         channels_(config.client_channels()),
         create_stub_(create_stub) {
     for (int i = 0; i < config.client_channels(); i++) {
@@ -409,6 +408,7 @@ class ClientImpl : public Client {
       // old compilers happy with using this in std::vector
       ChannelArguments args;
       args.SetInt("shard_to_ensure_no_subchannel_merges", shard);
+      set_channel_args(config, &args);
       channel_ = CreateTestChannel(
           target, config.security_params().server_host_override(),
           config.has_security_params(), !config.security_params().use_test_ca(),
@@ -423,6 +423,18 @@ class ClientImpl : public Client {
     StubType* get_stub() { return stub_.get(); }
 
    private:
+    void set_channel_args(const ClientConfig& config, ChannelArguments* args) {
+      for (auto channel_arg : config.channel_args()) {
+        if (channel_arg.value_case() == ChannelArg::kStrValue) {
+          args->SetString(channel_arg.name(), channel_arg.str_value());
+        } else if (channel_arg.value_case() == ChannelArg::kIntValue) {
+          args->SetInt(channel_arg.name(), channel_arg.int_value());
+        } else {
+          gpr_log(GPR_ERROR, "Empty channel arg value.");
+        }
+      }
+    }
+
     std::shared_ptr<Channel> channel_;
     std::unique_ptr<StubType> stub_;
   };
diff --git a/test/cpp/qps/client_sync.cc b/test/cpp/qps/client_sync.cc
index b1e61865e7..498416c64a 100644
--- a/test/cpp/qps/client_sync.cc
+++ b/test/cpp/qps/client_sync.cc
@@ -153,7 +153,6 @@ class SynchronousStreamingClient final : public SynchronousClient {
       if (*stream) {
         (*stream)->WritesDone();
         Status s = (*stream)->Finish();
-        EXPECT_TRUE(s.ok());
         if (!s.ok()) {
           gpr_log(GPR_ERROR, "Stream %zu received an error %s", i,
                   s.error_message().c_str());
@@ -173,7 +172,11 @@ class SynchronousStreamingClient final : public SynchronousClient {
       entry->set_value((UsageTimer::Now() - start) * 1e9);
       return true;
     }
-    return false;
+    auto* stub = channels_[thread_idx % channels_.size()].get_stub();
+    context_[thread_idx].~ClientContext();
+    new (&context_[thread_idx]) ClientContext();
+    stream_[thread_idx] = stub->StreamingCall(&context_[thread_idx]);
+    return true;
   }
 
  private:
diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index 93ef32db77..74fe3662c1 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -76,30 +76,6 @@ static std::string get_host(const std::string& worker) {
   return s;
 }
 
-static std::unordered_map<string, std::deque<int>> get_hosts_and_cores(
-    const deque<string>& workers) {
-  std::unordered_map<string, std::deque<int>> hosts;
-  for (auto it = workers.begin(); it != workers.end(); it++) {
-    const string host = get_host(*it);
-    if (hosts.find(host) == hosts.end()) {
-      auto stub = WorkerService::NewStub(
-          CreateChannel(*it, InsecureChannelCredentials()));
-      grpc::ClientContext ctx;
-      ctx.set_wait_for_ready(true);
-      CoreRequest dummy;
-      CoreResponse cores;
-      grpc::Status s = stub->CoreCount(&ctx, dummy, &cores);
-      GPR_ASSERT(s.ok());
-      std::deque<int> dq;
-      for (int i = 0; i < cores.cores(); i++) {
-        dq.push_back(i);
-      }
-      hosts[host] = dq;
-    }
-  }
-  return hosts;
-}
-
 static deque<string> get_workers(const string& env_name) {
   char* env = gpr_getenv(env_name.c_str());
   if (!env) {
@@ -210,7 +186,7 @@ std::unique_ptr<ScenarioResult> RunScenario(
     const ClientConfig& initial_client_config, size_t num_clients,
     const ServerConfig& initial_server_config, size_t num_servers,
     int warmup_seconds, int benchmark_seconds, int spawn_local_worker_count,
-    const char* qps_server_target_override, bool configure_core_lists) {
+    const char* qps_server_target_override) {
   // Log everything from the driver
   gpr_set_log_verbosity(GPR_LOG_SEVERITY_DEBUG);
 
@@ -279,9 +255,6 @@ std::unique_ptr<ScenarioResult> RunScenario(
   std::vector<ServerData> servers(num_servers);
   std::unordered_map<string, std::deque<int>> hosts_cores;
 
-  if (configure_core_lists) {
-    hosts_cores = get_hosts_and_cores(workers);
-  }
   for (size_t i = 0; i < num_servers; i++) {
     gpr_log(GPR_INFO, "Starting server on %s (worker #%" PRIuPTR ")",
             workers[i].c_str(), i);
@@ -289,37 +262,9 @@ std::unique_ptr<ScenarioResult> RunScenario(
         CreateChannel(workers[i], InsecureChannelCredentials()));
 
     ServerConfig server_config = initial_server_config;
-    int server_core_limit = initial_server_config.core_limit();
-    int client_core_limit = initial_client_config.core_limit();
-
-    if (configure_core_lists) {
-      string host_str(get_host(workers[i]));
-      if (server_core_limit == 0 && client_core_limit > 0) {
-        // In this case, limit the server cores if it matches the
-        // same host as one or more clients
-        const auto& dq = hosts_cores.at(host_str);
-        bool match = false;
-        int limit = dq.size();
-        for (size_t cli = 0; cli < num_clients; cli++) {
-          if (host_str == get_host(workers[cli + num_servers])) {
-            limit -= client_core_limit;
-            match = true;
-          }
-        }
-        if (match) {
-          GPR_ASSERT(limit > 0);
-          server_core_limit = limit;
-        }
-      }
-      if (server_core_limit > 0) {
-        auto& dq = hosts_cores.at(host_str);
-        GPR_ASSERT(dq.size() >= static_cast<size_t>(server_core_limit));
-        gpr_log(GPR_INFO, "Setting server core_list");
-        for (int core = 0; core < server_core_limit; core++) {
-          server_config.add_core_list(dq.front());
-          dq.pop_front();
-        }
-      }
+    if (server_config.core_limit() != 0) {
+      gpr_log(GPR_ERROR,
+              "server config core limit is set but ignored by driver");
     }
 
     ServerArgs args;
@@ -364,33 +309,8 @@ std::unique_ptr<ScenarioResult> RunScenario(
         CreateChannel(worker, InsecureChannelCredentials()));
     ClientConfig per_client_config = client_config;
 
-    int server_core_limit = initial_server_config.core_limit();
-    int client_core_limit = initial_client_config.core_limit();
-    if (configure_core_lists &&
-        ((server_core_limit > 0) || (client_core_limit > 0))) {
-      auto& dq = hosts_cores.at(get_host(worker));
-      if (client_core_limit == 0) {
-        // limit client cores if it matches a server host
-        bool match = false;
-        int limit = dq.size();
-        for (size_t srv = 0; srv < num_servers; srv++) {
-          if (get_host(worker) == get_host(workers[srv])) {
-            match = true;
-          }
-        }
-        if (match) {
-          GPR_ASSERT(limit > 0);
-          client_core_limit = limit;
-        }
-      }
-      if (client_core_limit > 0) {
-        GPR_ASSERT(dq.size() >= static_cast<size_t>(client_core_limit));
-        gpr_log(GPR_INFO, "Setting client core_list");
-        for (int core = 0; core < client_core_limit; core++) {
-          per_client_config.add_core_list(dq.front());
-          dq.pop_front();
-        }
-      }
+    if (initial_client_config.core_limit() != 0) {
+      gpr_log(GPR_ERROR, "client config core limit set but ignored");
     }
 
     // Reduce channel count so that total channels specified is held regardless
diff --git a/test/cpp/qps/driver.h b/test/cpp/qps/driver.h
index b5c8152e1b..e72d30a4ef 100644
--- a/test/cpp/qps/driver.h
+++ b/test/cpp/qps/driver.h
@@ -46,8 +46,7 @@ std::unique_ptr<ScenarioResult> RunScenario(
     const grpc::testing::ClientConfig& client_config, size_t num_clients,
     const grpc::testing::ServerConfig& server_config, size_t num_servers,
     int warmup_seconds, int benchmark_seconds, int spawn_local_worker_count,
-    const char* qps_server_target_override = "",
-    bool configure_core_lists = true);
+    const char* qps_server_target_override = "");
 
 bool RunQuit();
 }  // namespace testing
diff --git a/test/cpp/qps/gen_build_yaml.py b/test/cpp/qps/gen_build_yaml.py
index 188d6196e5..2f035abedd 100755
--- a/test/cpp/qps/gen_build_yaml.py
+++ b/test/cpp/qps/gen_build_yaml.py
@@ -92,7 +92,8 @@ print yaml.dump({
       'defaults': 'boringssl',
       'cpu_cost': guess_cpu(scenario_json, False),
       'exclude_configs': ['tsan', 'asan'],
-      'timeout_seconds': 6*60
+      'timeout_seconds': 6*60,
+      'excluded_poll_engines': scenario_json.get('EXCLUDED_POLL_ENGINES', [])
     }
     for scenario_json in scenario_config.CXXLanguage().scenarios()
     if 'scalable' in scenario_json.get('CATEGORIES', [])
@@ -109,8 +110,9 @@ print yaml.dump({
       'defaults': 'boringssl',
       'cpu_cost': guess_cpu(scenario_json, True),
       'exclude_configs': sorted(c for c in configs_from_yaml if c not in ('tsan', 'asan')),
-      'timeout_seconds': 6*60
-    }
+      'timeout_seconds': 6*60,
+      'excluded_poll_engines': scenario_json.get('EXCLUDED_POLL_ENGINES', [])
+   }
     for scenario_json in scenario_config.CXXLanguage().scenarios()
     if 'scalable' in scenario_json.get('CATEGORIES', [])
   ]
diff --git a/test/cpp/qps/qps_json_driver.cc b/test/cpp/qps/qps_json_driver.cc
index da835b995a..ddaaa7ca75 100644
--- a/test/cpp/qps/qps_json_driver.cc
+++ b/test/cpp/qps/qps_json_driver.cc
@@ -70,9 +70,6 @@ DEFINE_double(error_tolerance, 0.01,
 DEFINE_string(qps_server_target_override, "",
               "Override QPS server target to configure in client configs."
               "Only applicable if there is a single benchmark server.");
-DEFINE_bool(configure_core_lists, true,
-            "Provide 'core_list' parameters to workers. Value determined "
-            "by cores available and 'core_limit' parameters of the scenarios.");
 
 namespace grpc {
 namespace testing {
@@ -80,12 +77,12 @@ namespace testing {
 static std::unique_ptr<ScenarioResult> RunAndReport(const Scenario& scenario,
                                                     bool* success) {
   std::cerr << "RUNNING SCENARIO: " << scenario.name() << "\n";
-  auto result = RunScenario(
-      scenario.client_config(), scenario.num_clients(),
-      scenario.server_config(), scenario.num_servers(),
-      scenario.warmup_seconds(), scenario.benchmark_seconds(),
-      scenario.spawn_local_worker_count(),
-      FLAGS_qps_server_target_override.c_str(), FLAGS_configure_core_lists);
+  auto result =
+      RunScenario(scenario.client_config(), scenario.num_clients(),
+                  scenario.server_config(), scenario.num_servers(),
+                  scenario.warmup_seconds(), scenario.benchmark_seconds(),
+                  scenario.spawn_local_worker_count(),
+                  FLAGS_qps_server_target_override.c_str());
 
   // Amend the result with scenario config. Eventually we should adjust
   // RunScenario contract so we don't need to touch the result here.
@@ -212,6 +209,7 @@ static bool QpsDriver() {
             SearchOfferedLoad(FLAGS_initial_search_value,
                               FLAGS_targeted_cpu_load, scenario, &success);
         gpr_log(GPR_INFO, "targeted_offered_load %f", targeted_offered_load);
+        GetCpuLoad(scenario, targeted_offered_load, &success);
       } else {
         gpr_log(GPR_ERROR, "Unimplemented search param");
       }
diff --git a/test/cpp/qps/qps_openloop_test.cc b/test/cpp/qps/qps_openloop_test.cc
index 8dc50ac6d8..70e2709ac0 100644
--- a/test/cpp/qps/qps_openloop_test.cc
+++ b/test/cpp/qps/qps_openloop_test.cc
@@ -56,7 +56,7 @@ static void RunQPS() {
   client_config.set_async_client_threads(8);
   client_config.set_rpc_type(STREAMING);
   client_config.mutable_load_params()->mutable_poisson()->set_offered_load(
-      1000.0 / GRPC_TEST_SLOWDOWN_FACTOR);
+      1000.0 / grpc_test_slowdown_factor());
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
diff --git a/test/cpp/qps/server.h b/test/cpp/qps/server.h
index c3d18e5789..821d5935be 100644
--- a/test/cpp/qps/server.h
+++ b/test/cpp/qps/server.h
@@ -42,7 +42,6 @@
 #include "src/proto/grpc/testing/messages.grpc.pb.h"
 #include "test/core/end2end/data/ssl_test_data.h"
 #include "test/core/util/port.h"
-#include "test/cpp/qps/limit_cores.h"
 #include "test/cpp/qps/usage_timer.h"
 
 namespace grpc {
@@ -51,7 +50,7 @@ namespace testing {
 class Server {
  public:
   explicit Server(const ServerConfig& config) : timer_(new UsageTimer) {
-    cores_ = LimitCores(config.core_list().data(), config.core_list_size());
+    cores_ = gpr_cpu_num_cores();
     if (config.port()) {
       port_ = config.port();
 
diff --git a/test/cpp/qps/usage_timer.cc b/test/cpp/qps/usage_timer.cc
index c6697fbdfd..70ef26e82a 100644
--- a/test/cpp/qps/usage_timer.cc
+++ b/test/cpp/qps/usage_timer.cc
@@ -39,8 +39,15 @@
 
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
+#ifdef __linux__
 #include <sys/resource.h>
 #include <sys/time.h>
+
+static double time_double(struct timeval* tv) {
+  return tv->tv_sec + 1e-6 * tv->tv_usec;
+}
+#endif
+
 UsageTimer::UsageTimer() : start_(Sample()) {}
 
 double UsageTimer::Now() {
@@ -48,8 +55,16 @@ double UsageTimer::Now() {
   return ts.tv_sec + 1e-9 * ts.tv_nsec;
 }
 
-static double time_double(struct timeval* tv) {
-  return tv->tv_sec + 1e-6 * tv->tv_usec;
+static void get_resource_usage(double* utime, double* stime) {
+#ifdef __linux__
+  struct rusage usage;
+  getrusage(RUSAGE_SELF, &usage);
+  *utime = time_double(&usage.ru_utime);
+  *stime = time_double(&usage.ru_stime);
+#else
+  *utime = 0;
+  *stime = 0;
+#endif
 }
 
 static void get_cpu_usage(unsigned long long* total_cpu_time,
@@ -74,15 +89,9 @@ static void get_cpu_usage(unsigned long long* total_cpu_time,
 }
 
 UsageTimer::Result UsageTimer::Sample() {
-  struct rusage usage;
-  struct timeval tv;
-  gettimeofday(&tv, NULL);
-  getrusage(RUSAGE_SELF, &usage);
-
   Result r;
-  r.wall = time_double(&tv);
-  r.user = time_double(&usage.ru_utime);
-  r.system = time_double(&usage.ru_stime);
+  r.wall = Now();
+  get_resource_usage(&r.user, &r.system);
   r.total_cpu_time = 0;
   r.idle_cpu_time = 0;
   get_cpu_usage(&r.total_cpu_time, &r.idle_cpu_time);
diff --git a/test/cpp/qps/worker.cc b/test/cpp/qps/worker.cc
index 2068b7c213..e88d0647dd 100644
--- a/test/cpp/qps/worker.cc
+++ b/test/cpp/qps/worker.cc
@@ -31,7 +31,7 @@
  *
  */
 
-#include <sys/signal.h>
+#include <signal.h>
 
 #include <chrono>
 #include <thread>
diff --git a/test/cpp/test/server_context_test_spouse_test.cc b/test/cpp/test/server_context_test_spouse_test.cc
index e0d6a2ff67..eb279e2401 100644
--- a/test/cpp/test/server_context_test_spouse_test.cc
+++ b/test/cpp/test/server_context_test_spouse_test.cc
@@ -36,11 +36,14 @@
 #include <cstring>
 #include <vector>
 
+#include <grpc++/impl/grpc_library.h>
 #include <gtest/gtest.h>
 
 namespace grpc {
 namespace testing {
 
+static internal::GrpcLibraryInitializer g_initializer;
+
 const char key1[] = "metadata-key1";
 const char key2[] = "metadata-key2";
 const char val1[] = "metadata-val1";
diff --git a/test/cpp/thread_manager/thread_manager_test.cc b/test/cpp/thread_manager/thread_manager_test.cc
index 284761c53a..35c8d5d088 100644
--- a/test/cpp/thread_manager/thread_manager_test.cc
+++ b/test/cpp/thread_manager/thread_manager_test.cc
@@ -31,6 +31,7 @@
  *is % allowed in string
  */
 
+#include <ctime>
 #include <memory>
 #include <string>
 
diff --git a/test/cpp/util/cli_call.cc b/test/cpp/util/cli_call.cc
index a02a8b2ee2..041cc0e4c3 100644
--- a/test/cpp/util/cli_call.cc
+++ b/test/cpp/util/cli_call.cc
@@ -37,8 +37,6 @@
 
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
-#include <grpc++/completion_queue.h>
-#include <grpc++/generic/generic_stub.h>
 #include <grpc++/support/byte_buffer.h>
 #include <grpc/grpc.h>
 #include <grpc/slice.h>
@@ -56,55 +54,172 @@ Status CliCall::Call(std::shared_ptr<grpc::Channel> channel,
                      const OutgoingMetadataContainer& metadata,
                      IncomingMetadataContainer* server_initial_metadata,
                      IncomingMetadataContainer* server_trailing_metadata) {
-  std::unique_ptr<grpc::GenericStub> stub(new grpc::GenericStub(channel));
-  grpc::ClientContext ctx;
+  CliCall call(channel, method, metadata);
+  call.Write(request);
+  call.WritesDone();
+  if (!call.Read(response, server_initial_metadata)) {
+    fprintf(stderr, "Failed to read response.\n");
+  }
+  return call.Finish(server_trailing_metadata);
+}
+
+CliCall::CliCall(std::shared_ptr<grpc::Channel> channel,
+                 const grpc::string& method,
+                 const OutgoingMetadataContainer& metadata)
+    : stub_(new grpc::GenericStub(channel)) {
+  gpr_mu_init(&write_mu_);
+  gpr_cv_init(&write_cv_);
   if (!metadata.empty()) {
     for (OutgoingMetadataContainer::const_iterator iter = metadata.begin();
          iter != metadata.end(); ++iter) {
-      ctx.AddMetadata(iter->first, iter->second);
+      ctx_.AddMetadata(iter->first, iter->second);
     }
   }
-  grpc::CompletionQueue cq;
-  std::unique_ptr<grpc::GenericClientAsyncReaderWriter> call(
-      stub->Call(&ctx, method, &cq, tag(1)));
+  call_ = stub_->Call(&ctx_, method, &cq_, tag(1));
   void* got_tag;
   bool ok;
-  cq.Next(&got_tag, &ok);
+  cq_.Next(&got_tag, &ok);
   GPR_ASSERT(ok);
+}
+
+CliCall::~CliCall() {
+  gpr_cv_destroy(&write_cv_);
+  gpr_mu_destroy(&write_mu_);
+}
+
+void CliCall::Write(const grpc::string& request) {
+  void* got_tag;
+  bool ok;
 
   grpc_slice s = grpc_slice_from_copied_string(request.c_str());
   grpc::Slice req_slice(s, grpc::Slice::STEAL_REF);
   grpc::ByteBuffer send_buffer(&req_slice, 1);
-  call->Write(send_buffer, tag(2));
-  cq.Next(&got_tag, &ok);
-  GPR_ASSERT(ok);
-  call->WritesDone(tag(3));
-  cq.Next(&got_tag, &ok);
+  call_->Write(send_buffer, tag(2));
+  cq_.Next(&got_tag, &ok);
   GPR_ASSERT(ok);
+}
+
+bool CliCall::Read(grpc::string* response,
+                   IncomingMetadataContainer* server_initial_metadata) {
+  void* got_tag;
+  bool ok;
+
   grpc::ByteBuffer recv_buffer;
-  call->Read(&recv_buffer, tag(4));
-  cq.Next(&got_tag, &ok);
-  if (!ok) {
-    std::cout << "Failed to read response." << std::endl;
+  call_->Read(&recv_buffer, tag(3));
+
+  if (!cq_.Next(&got_tag, &ok) || !ok) {
+    return false;
   }
-  grpc::Status status;
-  call->Finish(&status, tag(5));
-  cq.Next(&got_tag, &ok);
+  std::vector<grpc::Slice> slices;
+  GPR_ASSERT(recv_buffer.Dump(&slices).ok());
+
+  response->clear();
+  for (size_t i = 0; i < slices.size(); i++) {
+    response->append(reinterpret_cast<const char*>(slices[i].begin()),
+                     slices[i].size());
+  }
+  if (server_initial_metadata) {
+    *server_initial_metadata = ctx_.GetServerInitialMetadata();
+  }
+  return true;
+}
+
+void CliCall::WritesDone() {
+  void* got_tag;
+  bool ok;
+
+  call_->WritesDone(tag(4));
+  cq_.Next(&got_tag, &ok);
   GPR_ASSERT(ok);
+}
 
-  if (status.ok()) {
-    std::vector<grpc::Slice> slices;
-    (void)recv_buffer.Dump(&slices);
+void CliCall::WriteAndWait(const grpc::string& request) {
+  grpc_slice s = grpc_slice_from_copied_string(request.c_str());
+  grpc::Slice req_slice(s, grpc::Slice::STEAL_REF);
+  grpc::ByteBuffer send_buffer(&req_slice, 1);
+
+  gpr_mu_lock(&write_mu_);
+  call_->Write(send_buffer, tag(2));
+  write_done_ = false;
+  while (!write_done_) {
+    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+  }
+  gpr_mu_unlock(&write_mu_);
+}
+
+void CliCall::WritesDoneAndWait() {
+  gpr_mu_lock(&write_mu_);
+  call_->WritesDone(tag(4));
+  write_done_ = false;
+  while (!write_done_) {
+    gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_REALTIME));
+  }
+  gpr_mu_unlock(&write_mu_);
+}
 
-    response->clear();
-    for (size_t i = 0; i < slices.size(); i++) {
-      response->append(reinterpret_cast<const char*>(slices[i].begin()),
-                       slices[i].size());
+bool CliCall::ReadAndMaybeNotifyWrite(
+    grpc::string* response,
+    IncomingMetadataContainer* server_initial_metadata) {
+  void* got_tag;
+  bool ok;
+  grpc::ByteBuffer recv_buffer;
+
+  call_->Read(&recv_buffer, tag(3));
+  bool cq_result = cq_.Next(&got_tag, &ok);
+
+  while (got_tag != tag(3)) {
+    gpr_mu_lock(&write_mu_);
+    write_done_ = true;
+    gpr_cv_signal(&write_cv_);
+    gpr_mu_unlock(&write_mu_);
+
+    cq_result = cq_.Next(&got_tag, &ok);
+    if (got_tag == tag(2)) {
+      GPR_ASSERT(ok);
     }
   }
 
-  *server_initial_metadata = ctx.GetServerInitialMetadata();
-  *server_trailing_metadata = ctx.GetServerTrailingMetadata();
+  if (!cq_result || !ok) {
+    // If the RPC is ended on the server side, we should still wait for the
+    // pending write on the client side to be done.
+    if (!ok) {
+      gpr_mu_lock(&write_mu_);
+      if (!write_done_) {
+        cq_.Next(&got_tag, &ok);
+        GPR_ASSERT(got_tag != tag(2));
+        write_done_ = true;
+        gpr_cv_signal(&write_cv_);
+      }
+      gpr_mu_unlock(&write_mu_);
+    }
+    return false;
+  }
+
+  std::vector<grpc::Slice> slices;
+  GPR_ASSERT(recv_buffer.Dump(&slices).ok());
+  response->clear();
+  for (size_t i = 0; i < slices.size(); i++) {
+    response->append(reinterpret_cast<const char*>(slices[i].begin()),
+                     slices[i].size());
+  }
+  if (server_initial_metadata) {
+    *server_initial_metadata = ctx_.GetServerInitialMetadata();
+  }
+  return true;
+}
+
+Status CliCall::Finish(IncomingMetadataContainer* server_trailing_metadata) {
+  void* got_tag;
+  bool ok;
+  grpc::Status status;
+
+  call_->Finish(&status, tag(5));
+  cq_.Next(&got_tag, &ok);
+  GPR_ASSERT(ok);
+  if (server_trailing_metadata) {
+    *server_trailing_metadata = ctx_.GetServerTrailingMetadata();
+  }
+
   return status;
 }
 
diff --git a/test/cpp/util/cli_call.h b/test/cpp/util/cli_call.h
index 65da86bd4e..91f0dbc9ed 100644
--- a/test/cpp/util/cli_call.h
+++ b/test/cpp/util/cli_call.h
@@ -37,23 +37,74 @@
 #include <map>
 
 #include <grpc++/channel.h>
+#include <grpc++/completion_queue.h>
+#include <grpc++/generic/generic_stub.h>
 #include <grpc++/support/status.h>
 #include <grpc++/support/string_ref.h>
 
 namespace grpc {
+
+class ClientContext;
+
 namespace testing {
 
+// CliCall handles the sending and receiving of generic messages given the name
+// of the remote method. This class is only used by GrpcTool. Its thread-safe
+// and thread-unsafe methods should not be used together.
 class CliCall final {
  public:
   typedef std::multimap<grpc::string, grpc::string> OutgoingMetadataContainer;
   typedef std::multimap<grpc::string_ref, grpc::string_ref>
       IncomingMetadataContainer;
+
+  CliCall(std::shared_ptr<grpc::Channel> channel, const grpc::string& method,
+          const OutgoingMetadataContainer& metadata);
+  ~CliCall();
+
+  // Perform an unary generic RPC.
   static Status Call(std::shared_ptr<grpc::Channel> channel,
                      const grpc::string& method, const grpc::string& request,
                      grpc::string* response,
                      const OutgoingMetadataContainer& metadata,
                      IncomingMetadataContainer* server_initial_metadata,
                      IncomingMetadataContainer* server_trailing_metadata);
+
+  // Send a generic request message in a synchronous manner. NOT thread-safe.
+  void Write(const grpc::string& request);
+
+  // Send a generic request message in a synchronous manner. NOT thread-safe.
+  void WritesDone();
+
+  // Receive a generic response message in a synchronous manner.NOT thread-safe.
+  bool Read(grpc::string* response,
+            IncomingMetadataContainer* server_initial_metadata);
+
+  // Thread-safe write. Must be used with ReadAndMaybeNotifyWrite. Send out a
+  // generic request message and wait for ReadAndMaybeNotifyWrite to finish it.
+  void WriteAndWait(const grpc::string& request);
+
+  // Thread-safe WritesDone. Must be used with ReadAndMaybeNotifyWrite. Send out
+  // WritesDone for gereneric request messages and wait for
+  // ReadAndMaybeNotifyWrite to finish it.
+  void WritesDoneAndWait();
+
+  // Thread-safe Read. Blockingly receive a generic response message. Notify
+  // writes if they are finished when this read is waiting for a resposne.
+  bool ReadAndMaybeNotifyWrite(
+      grpc::string* response,
+      IncomingMetadataContainer* server_initial_metadata);
+
+  // Finish the RPC.
+  Status Finish(IncomingMetadataContainer* server_trailing_metadata);
+
+ private:
+  std::unique_ptr<grpc::GenericStub> stub_;
+  grpc::ClientContext ctx_;
+  std::unique_ptr<grpc::GenericClientAsyncReaderWriter> call_;
+  grpc::CompletionQueue cq_;
+  gpr_mu write_mu_;
+  gpr_cv write_cv_;  // Protected by write_mu_;
+  bool write_done_;  // Portected by write_mu_;
 };
 
 }  // namespace testing
diff --git a/test/cpp/util/create_test_channel.cc b/test/cpp/util/create_test_channel.cc
index fe8b5d5423..ad62e03490 100644
--- a/test/cpp/util/create_test_channel.cc
+++ b/test/cpp/util/create_test_channel.cc
@@ -35,11 +35,37 @@
 
 #include <grpc++/create_channel.h>
 #include <grpc++/security/credentials.h>
+#include <grpc/support/log.h>
 
-#include "test/core/end2end/data/ssl_test_data.h"
+#include "test/cpp/util/test_credentials_provider.h"
 
 namespace grpc {
 
+namespace {
+
+const char kProdTlsCredentialsType[] = "prod_ssl";
+
+class SslCredentialProvider : public testing::CredentialTypeProvider {
+ public:
+  std::shared_ptr<ChannelCredentials> GetChannelCredentials(
+      grpc::ChannelArguments* args) override {
+    return SslCredentials(SslCredentialsOptions());
+  }
+  std::shared_ptr<ServerCredentials> GetServerCredentials() override {
+    return nullptr;
+  }
+};
+
+gpr_once g_once_init_add_prod_ssl_provider = GPR_ONCE_INIT;
+// Register ssl with non-test roots type to the credentials provider.
+void AddProdSslType() {
+  testing::GetCredentialsProvider()->AddSecureType(
+      kProdTlsCredentialsType, std::unique_ptr<testing::CredentialTypeProvider>(
+                                   new SslCredentialProvider));
+}
+
+}  // namespace
+
 // When ssl is enabled, if server is empty, override_hostname is used to
 // create channel. Otherwise, connect to server and override hostname if
 // override_hostname is provided.
@@ -61,16 +87,22 @@ std::shared_ptr<Channel> CreateTestChannel(
     const std::shared_ptr<CallCredentials>& creds,
     const ChannelArguments& args) {
   ChannelArguments channel_args(args);
+  std::shared_ptr<ChannelCredentials> channel_creds;
   if (enable_ssl) {
-    const char* roots_certs = use_prod_roots ? "" : test_root_cert;
-    SslCredentialsOptions ssl_opts = {roots_certs, "", ""};
-
-    std::shared_ptr<ChannelCredentials> channel_creds =
-        SslCredentials(ssl_opts);
-
-    if (!server.empty() && !override_hostname.empty()) {
-      channel_args.SetSslTargetNameOverride(override_hostname);
+    if (use_prod_roots) {
+      gpr_once_init(&g_once_init_add_prod_ssl_provider, &AddProdSslType);
+      channel_creds = testing::GetCredentialsProvider()->GetChannelCredentials(
+          kProdTlsCredentialsType, &channel_args);
+      if (!server.empty() && !override_hostname.empty()) {
+        channel_args.SetSslTargetNameOverride(override_hostname);
+      }
+    } else {
+      // override_hostname is discarded as the provider handles it.
+      channel_creds = testing::GetCredentialsProvider()->GetChannelCredentials(
+          testing::kTlsCredentialsType, &channel_args);
     }
+    GPR_ASSERT(channel_creds != nullptr);
+
     const grpc::string& connect_to =
         server.empty() ? override_hostname : server;
     if (creds.get()) {
@@ -103,4 +135,18 @@ std::shared_ptr<Channel> CreateTestChannel(const grpc::string& server,
   return CreateTestChannel(server, "foo.test.google.fr", enable_ssl, false);
 }
 
+std::shared_ptr<Channel> CreateTestChannel(
+    const grpc::string& server, const grpc::string& credential_type,
+    const std::shared_ptr<CallCredentials>& creds) {
+  ChannelArguments channel_args;
+  std::shared_ptr<ChannelCredentials> channel_creds =
+      testing::GetCredentialsProvider()->GetChannelCredentials(credential_type,
+                                                               &channel_args);
+  GPR_ASSERT(channel_creds != nullptr);
+  if (creds.get()) {
+    channel_creds = CompositeChannelCredentials(channel_creds, creds);
+  }
+  return CreateCustomChannel(server, channel_creds, channel_args);
+}
+
 }  // namespace grpc
diff --git a/test/cpp/util/create_test_channel.h b/test/cpp/util/create_test_channel.h
index 4ff666dc1b..ce71a97edb 100644
--- a/test/cpp/util/create_test_channel.h
+++ b/test/cpp/util/create_test_channel.h
@@ -59,6 +59,10 @@ std::shared_ptr<Channel> CreateTestChannel(
     const std::shared_ptr<CallCredentials>& creds,
     const ChannelArguments& args);
 
+std::shared_ptr<Channel> CreateTestChannel(
+    const grpc::string& server, const grpc::string& credential_type,
+    const std::shared_ptr<CallCredentials>& creds);
+
 }  // namespace grpc
 
 #endif  // GRPC_TEST_CPP_UTIL_CREATE_TEST_CHANNEL_H
diff --git a/test/cpp/util/grpc_cli.cc b/test/cpp/util/grpc_cli.cc
index fe248601ee..a78bed4b90 100644
--- a/test/cpp/util/grpc_cli.cc
+++ b/test/cpp/util/grpc_cli.cc
@@ -83,10 +83,10 @@ DEFINE_string(outfile, "", "Output file (default is stdout)");
 static bool SimplePrint(const grpc::string& outfile,
                         const grpc::string& output) {
   if (outfile.empty()) {
-    std::cout << output;
+    std::cout << output << std::endl;
   } else {
-    std::ofstream output_file(outfile, std::ios::trunc | std::ios::binary);
-    output_file << output;
+    std::ofstream output_file(outfile, std::ios::app | std::ios::binary);
+    output_file << output << std::endl;
     output_file.close();
   }
   return true;
diff --git a/test/cpp/util/grpc_tool.cc b/test/cpp/util/grpc_tool.cc
index b9900ca1b7..856cd32c3c 100644
--- a/test/cpp/util/grpc_tool.cc
+++ b/test/cpp/util/grpc_tool.cc
@@ -33,12 +33,13 @@
 
 #include "test/cpp/util/grpc_tool.h"
 
-#include <unistd.h>
+#include <cstdio>
 #include <fstream>
 #include <iostream>
 #include <memory>
 #include <sstream>
 #include <string>
+#include <thread>
 
 #include <gflags/gflags.h>
 #include <grpc++/channel.h>
@@ -47,12 +48,19 @@
 #include <grpc++/security/credentials.h>
 #include <grpc++/support/string_ref.h>
 #include <grpc/grpc.h>
+#include <grpc/support/port_platform.h>
 
 #include "test/cpp/util/cli_call.h"
 #include "test/cpp/util/proto_file_parser.h"
 #include "test/cpp/util/proto_reflection_descriptor_database.h"
 #include "test/cpp/util/service_describer.h"
 
+#if GPR_WINDOWS
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+
 namespace grpc {
 namespace testing {
 
@@ -159,6 +167,36 @@ void PrintMetadata(const T& m, const grpc::string& message) {
   }
 }
 
+void ReadResponse(CliCall* call, const grpc::string& method_name,
+                  GrpcToolOutputCallback callback, ProtoFileParser* parser,
+                  gpr_mu* parser_mu, bool print_mode) {
+  grpc::string serialized_response_proto;
+  std::multimap<grpc::string_ref, grpc::string_ref> server_initial_metadata;
+
+  for (bool receive_initial_metadata = true; call->ReadAndMaybeNotifyWrite(
+           &serialized_response_proto,
+           receive_initial_metadata ? &server_initial_metadata : nullptr);
+       receive_initial_metadata = false) {
+    fprintf(stderr, "got response.\n");
+    if (!FLAGS_binary_output) {
+      gpr_mu_lock(parser_mu);
+      serialized_response_proto = parser->GetTextFormatFromMethod(
+          method_name, serialized_response_proto, false /* is_request */);
+      if (parser->HasError() && print_mode) {
+        fprintf(stderr, "Failed to parse response.\n");
+      }
+      gpr_mu_unlock(parser_mu);
+    }
+    if (receive_initial_metadata) {
+      PrintMetadata(server_initial_metadata,
+                    "Received initial metadata from server:");
+    }
+    if (!callback(serialized_response_proto) && print_mode) {
+      fprintf(stderr, "Failed to output response.\n");
+    }
+  }
+}
+
 struct Command {
   const char* command;
   std::function<bool(GrpcTool*, int, const char**, const CliCredentials&,
@@ -416,85 +454,191 @@ bool GrpcTool::CallMethod(int argc, const char** argv,
   grpc::string server_address(argv[0]);
   grpc::string method_name(argv[1]);
   grpc::string formatted_method_name;
-  std::unique_ptr<grpc::testing::ProtoFileParser> parser;
+  std::unique_ptr<ProtoFileParser> parser;
   grpc::string serialized_request_proto;
+  bool print_mode = false;
 
-  if (argc == 3) {
-    request_text = argv[2];
-    if (!FLAGS_infile.empty()) {
-      fprintf(stderr, "warning: request given in argv, ignoring --infile\n");
-    }
+  std::shared_ptr<grpc::Channel> channel =
+      FLAGS_remotedb
+          ? grpc::CreateChannel(server_address, cred.GetCredentials())
+          : nullptr;
+
+  parser.reset(new grpc::testing::ProtoFileParser(channel, FLAGS_proto_path,
+                                                  FLAGS_protofiles));
+
+  if (FLAGS_binary_input) {
+    formatted_method_name = method_name;
   } else {
-    std::stringstream input_stream;
+    formatted_method_name = parser->GetFormattedMethodName(method_name);
+  }
+
+  if (parser->HasError()) {
+    return false;
+  }
+
+  if (parser->IsStreaming(method_name, true /* is_request */)) {
+    std::istream* input_stream;
+    std::ifstream input_file;
+
+    if (argc == 3) {
+      request_text = argv[2];
+    }
+
+    std::multimap<grpc::string, grpc::string> client_metadata;
+    ParseMetadataFlag(&client_metadata);
+    PrintMetadata(client_metadata, "Sending client initial metadata:");
+
+    CliCall call(channel, formatted_method_name, client_metadata);
+
     if (FLAGS_infile.empty()) {
-      if (isatty(STDIN_FILENO)) {
-        fprintf(stderr, "reading request message from stdin...\n");
+      if (isatty(fileno(stdin))) {
+        print_mode = true;
+        fprintf(stderr, "reading streaming request message from stdin...\n");
       }
-      input_stream << std::cin.rdbuf();
+      input_stream = &std::cin;
     } else {
-      std::ifstream input_file(FLAGS_infile, std::ios::in | std::ios::binary);
-      input_stream << input_file.rdbuf();
+      input_file.open(FLAGS_infile, std::ios::in | std::ios::binary);
+      input_stream = &input_file;
+    }
+
+    gpr_mu parser_mu;
+    gpr_mu_init(&parser_mu);
+    std::thread read_thread(ReadResponse, &call, method_name, callback,
+                            parser.get(), &parser_mu, print_mode);
+
+    std::stringstream request_ss;
+    grpc::string line;
+    while (!request_text.empty() ||
+           (!input_stream->eof() && getline(*input_stream, line))) {
+      if (!request_text.empty()) {
+        if (FLAGS_binary_input) {
+          serialized_request_proto = request_text;
+          request_text.clear();
+        } else {
+          gpr_mu_lock(&parser_mu);
+          serialized_request_proto = parser->GetSerializedProtoFromMethod(
+              method_name, request_text, true /* is_request */);
+          request_text.clear();
+          if (parser->HasError()) {
+            if (print_mode) {
+              fprintf(stderr, "Failed to parse request.\n");
+            }
+            gpr_mu_unlock(&parser_mu);
+            continue;
+          }
+          gpr_mu_unlock(&parser_mu);
+        }
+
+        call.WriteAndWait(serialized_request_proto);
+        if (print_mode) {
+          fprintf(stderr, "Request sent.\n");
+        }
+      } else {
+        if (line.length() == 0) {
+          request_text = request_ss.str();
+          request_ss.str(grpc::string());
+          request_ss.clear();
+        } else {
+          request_ss << line << ' ';
+        }
+      }
+    }
+    if (input_file.is_open()) {
       input_file.close();
     }
-    request_text = input_stream.str();
-  }
 
-  std::shared_ptr<grpc::Channel> channel =
-      grpc::CreateChannel(server_address, cred.GetCredentials());
-  if (!FLAGS_binary_input || !FLAGS_binary_output) {
-    parser.reset(
-        new grpc::testing::ProtoFileParser(FLAGS_remotedb ? channel : nullptr,
-                                           FLAGS_proto_path, FLAGS_protofiles));
-    if (parser->HasError()) {
+    call.WritesDoneAndWait();
+    read_thread.join();
+
+    std::multimap<grpc::string_ref, grpc::string_ref> server_trailing_metadata;
+    Status status = call.Finish(&server_trailing_metadata);
+    PrintMetadata(server_trailing_metadata,
+                  "Received trailing metadata from server:");
+
+    if (status.ok()) {
+      fprintf(stderr, "Stream RPC succeeded with OK status\n");
+      return true;
+    } else {
+      fprintf(stderr, "Rpc failed with status code %d, error message: %s\n",
+              status.error_code(), status.error_message().c_str());
       return false;
     }
-  }
 
-  if (FLAGS_binary_input) {
-    serialized_request_proto = request_text;
-    formatted_method_name = method_name;
-  } else {
-    formatted_method_name = parser->GetFormattedMethodName(method_name);
-    serialized_request_proto = parser->GetSerializedProtoFromMethod(
-        method_name, request_text, true /* is_request */);
-    if (parser->HasError()) {
-      return false;
+  } else {  // parser->IsStreaming(method_name, true /* is_request */)
+    if (argc == 3) {
+      request_text = argv[2];
+      if (!FLAGS_infile.empty()) {
+        fprintf(stderr, "warning: request given in argv, ignoring --infile\n");
+      }
+    } else {
+      std::stringstream input_stream;
+      if (FLAGS_infile.empty()) {
+        if (isatty(fileno(stdin))) {
+          fprintf(stderr, "reading request message from stdin...\n");
+        }
+        input_stream << std::cin.rdbuf();
+      } else {
+        std::ifstream input_file(FLAGS_infile, std::ios::in | std::ios::binary);
+        input_stream << input_file.rdbuf();
+        input_file.close();
+      }
+      request_text = input_stream.str();
     }
-  }
-  fprintf(stderr, "connecting to %s\n", server_address.c_str());
 
-  grpc::string serialized_response_proto;
-  std::multimap<grpc::string, grpc::string> client_metadata;
-  std::multimap<grpc::string_ref, grpc::string_ref> server_initial_metadata,
-      server_trailing_metadata;
-  ParseMetadataFlag(&client_metadata);
-  PrintMetadata(client_metadata, "Sending client initial metadata:");
-  grpc::Status status = grpc::testing::CliCall::Call(
-      channel, formatted_method_name, serialized_request_proto,
-      &serialized_response_proto, client_metadata, &server_initial_metadata,
-      &server_trailing_metadata);
-  PrintMetadata(server_initial_metadata,
-                "Received initial metadata from server:");
-  PrintMetadata(server_trailing_metadata,
-                "Received trailing metadata from server:");
-  if (status.ok()) {
-    fprintf(stderr, "Rpc succeeded with OK status\n");
-    if (FLAGS_binary_output) {
-      output_ss << serialized_response_proto;
+    if (FLAGS_binary_input) {
+      serialized_request_proto = request_text;
+      // formatted_method_name = method_name;
     } else {
-      grpc::string response_text = parser->GetTextFormatFromMethod(
-          method_name, serialized_response_proto, false /* is_request */);
+      // formatted_method_name = parser->GetFormattedMethodName(method_name);
+      serialized_request_proto = parser->GetSerializedProtoFromMethod(
+          method_name, request_text, true /* is_request */);
       if (parser->HasError()) {
         return false;
       }
-      output_ss << "Response: \n " << response_text << std::endl;
     }
-  } else {
-    fprintf(stderr, "Rpc failed with status code %d, error message: %s\n",
-            status.error_code(), status.error_message().c_str());
+    fprintf(stderr, "connecting to %s\n", server_address.c_str());
+
+    grpc::string serialized_response_proto;
+    std::multimap<grpc::string, grpc::string> client_metadata;
+    std::multimap<grpc::string_ref, grpc::string_ref> server_initial_metadata,
+        server_trailing_metadata;
+    ParseMetadataFlag(&client_metadata);
+    PrintMetadata(client_metadata, "Sending client initial metadata:");
+
+    CliCall call(channel, formatted_method_name, client_metadata);
+    call.Write(serialized_request_proto);
+    call.WritesDone();
+
+    for (bool receive_initial_metadata = true; call.Read(
+             &serialized_response_proto,
+             receive_initial_metadata ? &server_initial_metadata : nullptr);
+         receive_initial_metadata = false) {
+      if (!FLAGS_binary_output) {
+        serialized_response_proto = parser->GetTextFormatFromMethod(
+            method_name, serialized_response_proto, false /* is_request */);
+        if (parser->HasError()) {
+          return false;
+        }
+      }
+      if (receive_initial_metadata) {
+        PrintMetadata(server_initial_metadata,
+                      "Received initial metadata from server:");
+      }
+      if (!callback(serialized_response_proto)) {
+        return false;
+      }
+    }
+    Status status = call.Finish(&server_trailing_metadata);
+    if (status.ok()) {
+      fprintf(stderr, "Rpc succeeded with OK status\n");
+      return true;
+    } else {
+      fprintf(stderr, "Rpc failed with status code %d, error message: %s\n",
+              status.error_code(), status.error_message().c_str());
+      return false;
+    }
   }
-
-  return callback(output_ss.str());
+  GPR_UNREACHABLE_CODE(return false);
 }
 
 bool GrpcTool::ParseMessage(int argc, const char** argv,
@@ -531,7 +675,7 @@ bool GrpcTool::ParseMessage(int argc, const char** argv,
   } else {
     std::stringstream input_stream;
     if (FLAGS_infile.empty()) {
-      if (isatty(STDIN_FILENO)) {
+      if (isatty(fileno(stdin))) {
         fprintf(stderr, "reading request message from stdin...\n");
       }
       input_stream << std::cin.rdbuf();
diff --git a/test/cpp/util/grpc_tool_test.cc b/test/cpp/util/grpc_tool_test.cc
index 33ce611a60..26e2b1f502 100644
--- a/test/cpp/util/grpc_tool_test.cc
+++ b/test/cpp/util/grpc_tool_test.cc
@@ -102,6 +102,8 @@ DECLARE_bool(l);
 
 namespace {
 
+const int kNumResponseStreamsMsgs = 3;
+
 class TestCliCredentials final : public grpc::testing::CliCredentials {
  public:
   std::shared_ptr<grpc::ChannelCredentials> GetCredentials() const override {
@@ -137,6 +139,71 @@ class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
     response->set_message(request->message());
     return Status::OK;
   }
+
+  Status RequestStream(ServerContext* context,
+                       ServerReader<EchoRequest>* reader,
+                       EchoResponse* response) override {
+    EchoRequest request;
+    response->set_message("");
+    if (!context->client_metadata().empty()) {
+      for (std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator
+               iter = context->client_metadata().begin();
+           iter != context->client_metadata().end(); ++iter) {
+        context->AddInitialMetadata(ToString(iter->first),
+                                    ToString(iter->second));
+      }
+    }
+    context->AddTrailingMetadata("trailing_key", "trailing_value");
+    while (reader->Read(&request)) {
+      response->mutable_message()->append(request.message());
+    }
+
+    return Status::OK;
+  }
+
+  Status ResponseStream(ServerContext* context, const EchoRequest* request,
+                        ServerWriter<EchoResponse>* writer) override {
+    if (!context->client_metadata().empty()) {
+      for (std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator
+               iter = context->client_metadata().begin();
+           iter != context->client_metadata().end(); ++iter) {
+        context->AddInitialMetadata(ToString(iter->first),
+                                    ToString(iter->second));
+      }
+    }
+    context->AddTrailingMetadata("trailing_key", "trailing_value");
+
+    EchoResponse response;
+    for (int i = 0; i < kNumResponseStreamsMsgs; i++) {
+      response.set_message(request->message() + grpc::to_string(i));
+      writer->Write(response);
+    }
+
+    return Status::OK;
+  }
+
+  Status BidiStream(
+      ServerContext* context,
+      ServerReaderWriter<EchoResponse, EchoRequest>* stream) override {
+    EchoRequest request;
+    EchoResponse response;
+    if (!context->client_metadata().empty()) {
+      for (std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator
+               iter = context->client_metadata().begin();
+           iter != context->client_metadata().end(); ++iter) {
+        context->AddInitialMetadata(ToString(iter->first),
+                                    ToString(iter->second));
+      }
+    }
+    context->AddTrailingMetadata("trailing_key", "trailing_value");
+
+    while (stream->Read(&request)) {
+      response.set_message(request.message());
+      stream->Write(response);
+    }
+
+    return Status::OK;
+  }
 };
 
 }  // namespace
@@ -347,6 +414,132 @@ TEST_F(GrpcToolTest, CallCommand) {
   ShutdownServer();
 }
 
+TEST_F(GrpcToolTest, CallCommandRequestStream) {
+  // Test input: grpc_cli call localhost:<port> RequestStream "message:
+  // 'Hello0'"
+  std::stringstream output_stream;
+
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(),
+                        "RequestStream", "message: 'Hello0'"};
+
+  // Mock std::cin input "message: 'Hello1'\n\n message: 'Hello2'\n\n"
+  std::streambuf* orig = std::cin.rdbuf();
+  std::istringstream ss("message: 'Hello1'\n\n message: 'Hello2'\n\n");
+  std::cin.rdbuf(ss.rdbuf());
+
+  EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv, TestCliCredentials(),
+                                   std::bind(PrintStream, &output_stream,
+                                             std::placeholders::_1)));
+
+  // Expected output: "message: \"Hello0Hello1Hello2\""
+  EXPECT_TRUE(NULL != strstr(output_stream.str().c_str(),
+                             "message: \"Hello0Hello1Hello2\""));
+  std::cin.rdbuf(orig);
+  ShutdownServer();
+}
+
+TEST_F(GrpcToolTest, CallCommandRequestStreamWithBadRequest) {
+  // Test input: grpc_cli call localhost:<port> RequestStream "message:
+  // 'Hello0'"
+  std::stringstream output_stream;
+
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(),
+                        "RequestStream", "message: 'Hello0'"};
+
+  // Mock std::cin input "bad_field: 'Hello1'\n\n message: 'Hello2'\n\n"
+  std::streambuf* orig = std::cin.rdbuf();
+  std::istringstream ss("bad_field: 'Hello1'\n\n message: 'Hello2'\n\n");
+  std::cin.rdbuf(ss.rdbuf());
+
+  EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv, TestCliCredentials(),
+                                   std::bind(PrintStream, &output_stream,
+                                             std::placeholders::_1)));
+
+  // Expected output: "message: \"Hello0Hello2\""
+  EXPECT_TRUE(NULL !=
+              strstr(output_stream.str().c_str(), "message: \"Hello0Hello2\""));
+  std::cin.rdbuf(orig);
+  ShutdownServer();
+}
+
+TEST_F(GrpcToolTest, CallCommandResponseStream) {
+  // Test input: grpc_cli call localhost:<port> ResponseStream "message:
+  // 'Hello'"
+  std::stringstream output_stream;
+
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(),
+                        "ResponseStream", "message: 'Hello'"};
+
+  EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv, TestCliCredentials(),
+                                   std::bind(PrintStream, &output_stream,
+                                             std::placeholders::_1)));
+
+  // Expected output: "message: \"Hello{n}\""
+  for (int i = 0; i < kNumResponseStreamsMsgs; i++) {
+    grpc::string expected_response_text =
+        "message: \"Hello" + grpc::to_string(i) + "\"\n";
+    EXPECT_TRUE(NULL != strstr(output_stream.str().c_str(),
+                               expected_response_text.c_str()));
+  }
+
+  ShutdownServer();
+}
+
+TEST_F(GrpcToolTest, CallCommandBidiStream) {
+  // Test input: grpc_cli call localhost:<port> BidiStream "message: 'Hello0'"
+  std::stringstream output_stream;
+
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(),
+                        "BidiStream", "message: 'Hello0'"};
+
+  // Mock std::cin input "message: 'Hello1'\n\n message: 'Hello2'\n\n"
+  std::streambuf* orig = std::cin.rdbuf();
+  std::istringstream ss("message: 'Hello1'\n\n message: 'Hello2'\n\n");
+  std::cin.rdbuf(ss.rdbuf());
+
+  EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv, TestCliCredentials(),
+                                   std::bind(PrintStream, &output_stream,
+                                             std::placeholders::_1)));
+
+  // Expected output: "message: \"Hello0\"\nmessage: \"Hello1\"\nmessage:
+  // \"Hello2\"\n\n"
+  EXPECT_TRUE(NULL != strstr(output_stream.str().c_str(),
+                             "message: \"Hello0\"\nmessage: "
+                             "\"Hello1\"\nmessage: \"Hello2\"\n"));
+  std::cin.rdbuf(orig);
+  ShutdownServer();
+}
+
+TEST_F(GrpcToolTest, CallCommandBidiStreamWithBadRequest) {
+  // Test input: grpc_cli call localhost:<port> BidiStream "message: 'Hello0'"
+  std::stringstream output_stream;
+
+  const grpc::string server_address = SetUpServer();
+  const char* argv[] = {"grpc_cli", "call", server_address.c_str(),
+                        "BidiStream", "message: 'Hello0'"};
+
+  // Mock std::cin input "message: 'Hello1'\n\n message: 'Hello2'\n\n"
+  std::streambuf* orig = std::cin.rdbuf();
+  std::istringstream ss("message: 1.0\n\n message: 'Hello2'\n\n");
+  std::cin.rdbuf(ss.rdbuf());
+
+  EXPECT_TRUE(0 == GrpcToolMainLib(ArraySize(argv), argv, TestCliCredentials(),
+                                   std::bind(PrintStream, &output_stream,
+                                             std::placeholders::_1)));
+
+  // Expected output: "message: \"Hello0\"\nmessage: \"Hello1\"\nmessage:
+  // \"Hello2\"\n\n"
+  EXPECT_TRUE(NULL != strstr(output_stream.str().c_str(),
+                             "message: \"Hello0\"\nmessage: \"Hello2\"\n"));
+  std::cin.rdbuf(orig);
+
+  ShutdownServer();
+}
+
 TEST_F(GrpcToolTest, ParseCommand) {
   // Test input "grpc_cli parse localhost:<port> grpc.testing.EchoResponse
   // ECHO_RESPONSE_MESSAGE"
diff --git a/test/cpp/util/proto_file_parser.cc b/test/cpp/util/proto_file_parser.cc
index bc8a6083f4..5dd1b00e8a 100644
--- a/test/cpp/util/proto_file_parser.cc
+++ b/test/cpp/util/proto_file_parser.cc
@@ -81,7 +81,8 @@ class ErrorPrinter : public protobuf::compiler::MultiFileErrorCollector {
 ProtoFileParser::ProtoFileParser(std::shared_ptr<grpc::Channel> channel,
                                  const grpc::string& proto_path,
                                  const grpc::string& protofiles)
-    : has_error_(false) {
+    : has_error_(false),
+      dynamic_factory_(new protobuf::DynamicMessageFactory()) {
   std::vector<grpc::string> service_list;
   if (channel) {
     reflection_db_.reset(new grpc::ProtoReflectionDescriptorDatabase(channel));
@@ -127,7 +128,6 @@ ProtoFileParser::ProtoFileParser(std::shared_ptr<grpc::Channel> channel,
   }
 
   desc_pool_.reset(new protobuf::DescriptorPool(desc_db_.get()));
-  dynamic_factory_.reset(new protobuf::DynamicMessageFactory(desc_pool_.get()));
 
   for (auto it = service_list.begin(); it != service_list.end(); it++) {
     if (known_services.find(*it) == known_services.end()) {
@@ -144,6 +144,11 @@ ProtoFileParser::~ProtoFileParser() {}
 
 grpc::string ProtoFileParser::GetFullMethodName(const grpc::string& method) {
   has_error_ = false;
+
+  if (known_methods_.find(method) != known_methods_.end()) {
+    return known_methods_[method];
+  }
+
   const protobuf::MethodDescriptor* method_descriptor = nullptr;
   for (auto it = service_desc_list_.begin(); it != service_desc_list_.end();
        it++) {
@@ -169,6 +174,8 @@ grpc::string ProtoFileParser::GetFullMethodName(const grpc::string& method) {
     return "";
   }
 
+  known_methods_[method] = method_descriptor->full_name();
+
   return method_descriptor->full_name();
 }
 
@@ -205,6 +212,25 @@ grpc::string ProtoFileParser::GetMessageTypeFromMethod(
                     : method_desc->output_type()->full_name();
 }
 
+bool ProtoFileParser::IsStreaming(const grpc::string& method, bool is_request) {
+  has_error_ = false;
+
+  grpc::string full_method_name = GetFullMethodName(method);
+  if (has_error_) {
+    return false;
+  }
+
+  const protobuf::MethodDescriptor* method_desc =
+      desc_pool_->FindMethodByName(full_method_name);
+  if (!method_desc) {
+    LogError("Method not found");
+    return false;
+  }
+
+  return is_request ? method_desc->client_streaming()
+                    : method_desc->server_streaming();
+}
+
 grpc::string ProtoFileParser::GetSerializedProtoFromMethod(
     const grpc::string& method, const grpc::string& text_format_proto,
     bool is_request) {
diff --git a/test/cpp/util/proto_file_parser.h b/test/cpp/util/proto_file_parser.h
index c1070a37b5..23d311ef8f 100644
--- a/test/cpp/util/proto_file_parser.h
+++ b/test/cpp/util/proto_file_parser.h
@@ -84,6 +84,8 @@ class ProtoFileParser {
       const grpc::string& message_type_name,
       const grpc::string& serialized_proto);
 
+  bool IsStreaming(const grpc::string& method, bool is_request);
+
   bool HasError() const { return has_error_; }
 
   void LogError(const grpc::string& error_msg);
@@ -104,6 +106,7 @@ class ProtoFileParser {
   std::unique_ptr<protobuf::DynamicMessageFactory> dynamic_factory_;
   std::unique_ptr<grpc::protobuf::Message> request_prototype_;
   std::unique_ptr<grpc::protobuf::Message> response_prototype_;
+  std::unordered_map<grpc::string, grpc::string> known_methods_;
   std::vector<const protobuf::ServiceDescriptor*> service_desc_list_;
 };
 
diff --git a/test/cpp/util/test_credentials_provider.cc b/test/cpp/util/test_credentials_provider.cc
index 0456b96667..909b02a701 100644
--- a/test/cpp/util/test_credentials_provider.cc
+++ b/test/cpp/util/test_credentials_provider.cc
@@ -43,25 +43,9 @@
 #include "test/core/end2end/data/ssl_test_data.h"
 
 namespace grpc {
+namespace testing {
 namespace {
 
-using grpc::testing::CredentialTypeProvider;
-
-// Provide test credentials. Thread-safe.
-class CredentialsProvider {
- public:
-  virtual ~CredentialsProvider() {}
-
-  virtual void AddSecureType(
-      const grpc::string& type,
-      std::unique_ptr<CredentialTypeProvider> type_provider) = 0;
-  virtual std::shared_ptr<ChannelCredentials> GetChannelCredentials(
-      const grpc::string& type, ChannelArguments* args) = 0;
-  virtual std::shared_ptr<ServerCredentials> GetServerCredentials(
-      const grpc::string& type) = 0;
-  virtual std::vector<grpc::string> GetSecureCredentialsTypeList() = 0;
-};
-
 class DefaultCredentialsProvider : public CredentialsProvider {
  public:
   ~DefaultCredentialsProvider() override {}
@@ -145,37 +129,21 @@ class DefaultCredentialsProvider : public CredentialsProvider {
       added_secure_type_providers_;
 };
 
-gpr_once g_once_init_provider = GPR_ONCE_INIT;
 CredentialsProvider* g_provider = nullptr;
 
-void CreateDefaultProvider() { g_provider = new DefaultCredentialsProvider; }
-
-CredentialsProvider* GetProvider() {
-  gpr_once_init(&g_once_init_provider, &CreateDefaultProvider);
-  return g_provider;
-}
-
 }  // namespace
 
-namespace testing {
-
-void AddSecureType(const grpc::string& type,
-                   std::unique_ptr<CredentialTypeProvider> type_provider) {
-  GetProvider()->AddSecureType(type, std::move(type_provider));
-}
-
-std::shared_ptr<ChannelCredentials> GetChannelCredentials(
-    const grpc::string& type, ChannelArguments* args) {
-  return GetProvider()->GetChannelCredentials(type, args);
-}
-
-std::shared_ptr<ServerCredentials> GetServerCredentials(
-    const grpc::string& type) {
-  return GetProvider()->GetServerCredentials(type);
+CredentialsProvider* GetCredentialsProvider() {
+  if (g_provider == nullptr) {
+    g_provider = new DefaultCredentialsProvider;
+  }
+  return g_provider;
 }
 
-std::vector<grpc::string> GetSecureCredentialsTypeList() {
-  return GetProvider()->GetSecureCredentialsTypeList();
+void SetCredentialsProvider(CredentialsProvider* provider) {
+  // For now, forbids overriding provider.
+  GPR_ASSERT(g_provider == nullptr);
+  g_provider = provider;
 }
 
 }  // namespace testing
diff --git a/test/cpp/util/test_credentials_provider.h b/test/cpp/util/test_credentials_provider.h
index 1fb311e556..0bc52ebe4d 100644
--- a/test/cpp/util/test_credentials_provider.h
+++ b/test/cpp/util/test_credentials_provider.h
@@ -59,23 +59,39 @@ class CredentialTypeProvider {
   virtual std::shared_ptr<ServerCredentials> GetServerCredentials() = 0;
 };
 
-// Add a secure type in addition to the defaults above
-// (kInsecureCredentialsType, kTlsCredentialsType) that can be returned from the
-// functions below.
-void AddSecureType(const grpc::string& type,
-                   std::unique_ptr<CredentialTypeProvider> type_provider);
-
-// Provide channel credentials according to the given type. Alter the channel
-// arguments if needed.
-std::shared_ptr<ChannelCredentials> GetChannelCredentials(
-    const grpc::string& type, ChannelArguments* args);
-
-// Provide server credentials according to the given type.
-std::shared_ptr<ServerCredentials> GetServerCredentials(
-    const grpc::string& type);
-
-// Provide a list of secure credentials type.
-std::vector<grpc::string> GetSecureCredentialsTypeList();
+// Provide test credentials. Thread-safe.
+class CredentialsProvider {
+ public:
+  virtual ~CredentialsProvider() {}
+
+  // Add a secure type in addition to the defaults. The default provider has
+  // (kInsecureCredentialsType, kTlsCredentialsType).
+  virtual void AddSecureType(
+      const grpc::string& type,
+      std::unique_ptr<CredentialTypeProvider> type_provider) = 0;
+
+  // Provide channel credentials according to the given type. Alter the channel
+  // arguments if needed. Return nullptr if type is not registered.
+  virtual std::shared_ptr<ChannelCredentials> GetChannelCredentials(
+      const grpc::string& type, ChannelArguments* args) = 0;
+
+  // Provide server credentials according to the given type.
+  // Return nullptr if type is not registered.
+  virtual std::shared_ptr<ServerCredentials> GetServerCredentials(
+      const grpc::string& type) = 0;
+
+  // Provide a list of secure credentials type.
+  virtual std::vector<grpc::string> GetSecureCredentialsTypeList() = 0;
+};
+
+// Get the current provider. Create a default one if not set.
+// Not thread-safe.
+CredentialsProvider* GetCredentialsProvider();
+
+// Set the global provider. Takes ownership. The previous set provider will be
+// destroyed.
+// Not thread-safe.
+void SetCredentialsProvider(CredentialsProvider* provider);
 
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/http2_test/http2_base_server.py b/test/http2_test/http2_base_server.py
index ee7719b1a8..8de028ceb1 100644
--- a/test/http2_test/http2_base_server.py
+++ b/test/http2_test/http2_base_server.py
@@ -73,7 +73,6 @@ class H2ProtocolBaseServer(twisted.internet.protocol.Protocol):
 
   def on_connection_lost(self, reason):
     logging.info('Disconnected %s' % reason)
-    twisted.internet.reactor.callFromThread(twisted.internet.reactor.stop)
 
   def dataReceived(self, data):
     try:
diff --git a/test/http2_test/http2_test_server.py b/test/http2_test/http2_test_server.py
index 44e36d34b6..abde3433ad 100644
--- a/test/http2_test/http2_test_server.py
+++ b/test/http2_test/http2_test_server.py
@@ -73,18 +73,32 @@ class H2Factory(twisted.internet.protocol.Factory):
     else:
       return t().get_base_server()
 
+def parse_arguments():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--base_port', type=int, default=8080,
+    help='base port to run the servers (default: 8080). One test server is '
+    'started on each incrementing port, beginning with base_port, in the '
+    'following order: goaway,max_streams,ping,rst_after_data,rst_after_header,'
+    'rst_during_data'
+    )
+  return parser.parse_args()
+
+def start_test_servers(base_port):
+  """ Start one server per test case on incrementing port numbers
+  beginning with base_port """
+  index = 0
+  for test_case in sorted(_TEST_CASE_MAPPING.keys()):
+    portnum = base_port + index
+    logging.warning('serving on port %d : %s'%(portnum, test_case))
+    endpoint = twisted.internet.endpoints.TCP4ServerEndpoint(
+      twisted.internet.reactor, portnum, backlog=128)
+    endpoint.listen(H2Factory(test_case))
+    index += 1
+
 if __name__ == '__main__':
   logging.basicConfig(
     format='%(levelname) -10s %(asctime)s %(module)s:%(lineno)s | %(message)s',
     level=logging.INFO)
-  parser = argparse.ArgumentParser()
-  parser.add_argument('--test_case', choices=sorted(_TEST_CASE_MAPPING.keys()),
-    help='test case to run', required=True)
-  parser.add_argument('--port', type=int, default=8080,
-    help='port to run the server (default: 8080)')
-  args = parser.parse_args()
-  logging.info('Running test case %s on port %d' % (args.test_case, args.port))
-  endpoint = twisted.internet.endpoints.TCP4ServerEndpoint(
-    twisted.internet.reactor, args.port, backlog=128)
-  endpoint.listen(H2Factory(args.test_case))
+  args = parse_arguments()
+  start_test_servers(args.base_port)
   twisted.internet.reactor.run()