Introduce a clock type field onto gpr_timespec.

Use it to validate that arithmetic on time types makes even some vague
kind of sense.

22 files changed, 157 insertions, 126 deletions

diff --git a/test/core/end2end/multiple_server_queues_test.c b/test/core/end2end/multiple_server_queues_test.c
index e291e4e6d3..208d42e6e7 100644
--- a/test/core/end2end/multiple_server_queues_test.c
+++ b/test/core/end2end/multiple_server_queues_test.c
@@ -49,11 +49,12 @@ int main(int argc, char **argv) {
   grpc_server_register_completion_queue(server, cq2);
   grpc_server_start(server);
   grpc_server_shutdown_and_notify(server, cq2, NULL);
-  grpc_completion_queue_next(cq2, gpr_inf_future); /* cue queue hang */
+  grpc_completion_queue_next(
+      cq2, gpr_inf_future(GPR_CLOCK_REALTIME)); /* cue queue hang */
   grpc_completion_queue_shutdown(cq1);
   grpc_completion_queue_shutdown(cq2);
-  grpc_completion_queue_next(cq1, gpr_inf_future);
-  grpc_completion_queue_next(cq2, gpr_inf_future);
+  grpc_completion_queue_next(cq1, gpr_inf_future(GPR_CLOCK_REALTIME));
+  grpc_completion_queue_next(cq2, gpr_inf_future(GPR_CLOCK_REALTIME));
   grpc_server_destroy(server);
   grpc_completion_queue_destroy(cq1);
   grpc_completion_queue_destroy(cq2);
diff --git a/test/core/end2end/no_server_test.c b/test/core/end2end/no_server_test.c
index 35b837b7b5..79797f9375 100644
--- a/test/core/end2end/no_server_test.c
+++ b/test/core/end2end/no_server_test.c
@@ -85,8 +85,8 @@ int main(int argc, char **argv) {
   GPR_ASSERT(status == GRPC_STATUS_DEADLINE_EXCEEDED);
 
   grpc_completion_queue_shutdown(cq);
-  while (grpc_completion_queue_next(cq, gpr_inf_future).type !=
-         GRPC_QUEUE_SHUTDOWN)
+  while (grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME))
+             .type != GRPC_QUEUE_SHUTDOWN)
     ;
   grpc_completion_queue_destroy(cq);
   grpc_call_destroy(call);
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.c
index 9d716f1135..ea59a9385f 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.c
@@ -129,7 +129,8 @@ static void test_max_message_length(grpc_end2end_test_config config) {
   cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, f.cq, "/foo",
-                               "foo.test.google.fr:1234", gpr_inf_future);
+                               "foo.test.google.fr:1234",
+                               gpr_inf_future(GPR_CLOCK_REALTIME));
   GPR_ASSERT(c);
 
   grpc_metadata_array_init(&initial_metadata_recv);
diff --git a/test/core/fling/client.c b/test/core/fling/client.c
index 6741a9dec8..2b19654379 100644
--- a/test/core/fling/client.c
+++ b/test/core/fling/client.c
@@ -89,24 +89,26 @@ static void init_ping_pong_request(void) {
 }
 
 static void step_ping_pong_request(void) {
-  call = grpc_channel_create_call(channel, cq, "/Reflector/reflectUnary",
-                                  "localhost", gpr_inf_future);
+  call =
+      grpc_channel_create_call(channel, cq, "/Reflector/reflectUnary",
+                               "localhost", gpr_inf_future(GPR_CLOCK_REALTIME));
   GPR_ASSERT(GRPC_CALL_OK ==
              grpc_call_start_batch(call, ops, op - ops, (void *)1));
-  grpc_completion_queue_next(cq, gpr_inf_future);
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME));
   grpc_call_destroy(call);
   grpc_byte_buffer_destroy(response_payload_recv);
   call = NULL;
 }
 
 static void init_ping_pong_stream(void) {
-  call = grpc_channel_create_call(channel, cq, "/Reflector/reflectStream",
-                                  "localhost", gpr_inf_future);
+  call =
+      grpc_channel_create_call(channel, cq, "/Reflector/reflectStream",
+                               "localhost", gpr_inf_future(GPR_CLOCK_REALTIME));
   stream_init_op.op = GRPC_OP_SEND_INITIAL_METADATA;
   stream_init_op.data.send_initial_metadata.count = 0;
   GPR_ASSERT(GRPC_CALL_OK ==
              grpc_call_start_batch(call, &stream_init_op, 1, (void *)1));
-  grpc_completion_queue_next(cq, gpr_inf_future);
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   grpc_metadata_array_init(&initial_metadata_recv);
 
@@ -119,7 +121,7 @@ static void init_ping_pong_stream(void) {
 static void step_ping_pong_stream(void) {
   GPR_ASSERT(GRPC_CALL_OK ==
              grpc_call_start_batch(call, stream_step_ops, 2, (void *)1));
-  grpc_completion_queue_next(cq, gpr_inf_future);
+  grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME));
   grpc_byte_buffer_destroy(response_payload_recv);
 }
 
@@ -208,8 +210,8 @@ int main(int argc, char **argv) {
 
   grpc_channel_destroy(channel);
   grpc_completion_queue_shutdown(cq);
-  while (grpc_completion_queue_next(cq, gpr_inf_future).type !=
-         GRPC_QUEUE_SHUTDOWN)
+  while (grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME))
+             .type != GRPC_QUEUE_SHUTDOWN)
     ;
   grpc_completion_queue_destroy(cq);
   grpc_byte_buffer_destroy(the_buffer);
diff --git a/test/core/iomgr/alarm_heap_test.c b/test/core/iomgr/alarm_heap_test.c
index b3e1e64d0f..66b6e4cb64 100644
--- a/test/core/iomgr/alarm_heap_test.c
+++ b/test/core/iomgr/alarm_heap_test.c
@@ -44,6 +44,7 @@ static gpr_timespec random_deadline(void) {
   gpr_timespec ts;
   ts.tv_sec = rand();
   ts.tv_nsec = rand();
+  ts.clock_type = GPR_CLOCK_REALTIME;
   return ts;
 }
 
@@ -101,7 +102,7 @@ static int *all_top(grpc_alarm_heap *pq, int *n) {
 
 static void check_pq_top(grpc_alarm *elements, grpc_alarm_heap *pq,
                          gpr_uint8 *inpq, int num_elements) {
-  gpr_timespec max_deadline = gpr_inf_past;
+  gpr_timespec max_deadline = gpr_inf_past(GPR_CLOCK_REALTIME);
   int *max_deadline_indices = gpr_malloc(num_elements * sizeof(int));
   int *top_elements;
   int num_max_deadline_indices = 0;
diff --git a/test/core/iomgr/alarm_list_test.c b/test/core/iomgr/alarm_list_test.c
index 225c449d4b..2d7cf6c3ec 100644
--- a/test/core/iomgr/alarm_list_test.c
+++ b/test/core/iomgr/alarm_list_test.c
@@ -107,24 +107,30 @@ static void add_test(void) {
   grpc_alarm_list_shutdown();
 }
 
+static gpr_timespec tfm(int m) {
+  gpr_timespec t = gpr_time_from_millis(m);
+  t.clock_type = GPR_CLOCK_REALTIME;
+  return t;
+}
+
 /* Cleaning up a list with pending alarms. */
 void destruction_test(void) {
   grpc_alarm alarms[5];
 
-  grpc_alarm_list_init(gpr_time_0);
+  grpc_alarm_list_init(gpr_time_0(GPR_CLOCK_REALTIME));
   memset(cb_called, 0, sizeof(cb_called));
 
-  grpc_alarm_init(&alarms[0], gpr_time_from_millis(100), cb,
-                  (void *)(gpr_intptr)0, gpr_time_0);
-  grpc_alarm_init(&alarms[1], gpr_time_from_millis(3), cb,
-                  (void *)(gpr_intptr)1, gpr_time_0);
-  grpc_alarm_init(&alarms[2], gpr_time_from_millis(100), cb,
-                  (void *)(gpr_intptr)2, gpr_time_0);
-  grpc_alarm_init(&alarms[3], gpr_time_from_millis(3), cb,
-                  (void *)(gpr_intptr)3, gpr_time_0);
-  grpc_alarm_init(&alarms[4], gpr_time_from_millis(1), cb,
-                  (void *)(gpr_intptr)4, gpr_time_0);
-  GPR_ASSERT(1 == grpc_alarm_check(NULL, gpr_time_from_millis(2), NULL));
+  grpc_alarm_init(&alarms[0], tfm(100), cb, (void *)(gpr_intptr)0,
+                  gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_alarm_init(&alarms[1], tfm(3), cb, (void *)(gpr_intptr)1,
+                  gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_alarm_init(&alarms[2], tfm(100), cb, (void *)(gpr_intptr)2,
+                  gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_alarm_init(&alarms[3], tfm(3), cb, (void *)(gpr_intptr)3,
+                  gpr_time_0(GPR_CLOCK_REALTIME));
+  grpc_alarm_init(&alarms[4], tfm(1), cb, (void *)(gpr_intptr)4,
+                  gpr_time_0(GPR_CLOCK_REALTIME));
+  GPR_ASSERT(1 == grpc_alarm_check(NULL, tfm(2), NULL));
   GPR_ASSERT(1 == cb_called[4][1]);
   grpc_alarm_cancel(&alarms[0]);
   grpc_alarm_cancel(&alarms[3]);
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index fe08ec495f..cd268661db 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -249,7 +249,7 @@ static int server_start(server *sv) {
 static void server_wait_and_shutdown(server *sv) {
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   while (!sv->done) {
-    grpc_pollset_work(&g_pollset, gpr_inf_future);
+    grpc_pollset_work(&g_pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
 }
@@ -356,7 +356,7 @@ static void client_start(client *cl, int port) {
 static void client_wait_and_shutdown(client *cl) {
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   while (!cl->done) {
-    grpc_pollset_work(&g_pollset, gpr_inf_future);
+    grpc_pollset_work(&g_pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
 }
@@ -445,7 +445,7 @@ static void test_grpc_fd_change(void) {
   /* And now wait for it to run. */
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   while (a.cb_that_ran == NULL) {
-    grpc_pollset_work(&g_pollset, gpr_inf_future);
+    grpc_pollset_work(&g_pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   GPR_ASSERT(a.cb_that_ran == first_read_callback);
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
@@ -463,7 +463,7 @@ static void test_grpc_fd_change(void) {
 
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   while (b.cb_that_ran == NULL) {
-    grpc_pollset_work(&g_pollset, gpr_inf_future);
+    grpc_pollset_work(&g_pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   /* Except now we verify that second_read_callback ran instead */
   GPR_ASSERT(b.cb_that_ran == second_read_callback);
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index 710cd725df..36b1d6c939 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -95,7 +95,8 @@ void test_succeeds(void) {
   /* connect to it */
   GPR_ASSERT(getsockname(svr_fd, (struct sockaddr *)&addr, &addr_len) == 0);
   grpc_tcp_client_connect(must_succeed, NULL, &g_pollset_set,
-                          (struct sockaddr *)&addr, addr_len, gpr_inf_future);
+                          (struct sockaddr *)&addr, addr_len,
+                          gpr_inf_future(GPR_CLOCK_REALTIME));
 
   /* await the connection */
   do {
@@ -128,7 +129,8 @@ void test_fails(void) {
 
   /* connect to a broken address */
   grpc_tcp_client_connect(must_fail, NULL, &g_pollset_set,
-                          (struct sockaddr *)&addr, addr_len, gpr_inf_future);
+                          (struct sockaddr *)&addr, addr_len,
+                          gpr_inf_future(GPR_CLOCK_REALTIME));
 
   gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
 
diff --git a/test/core/security/fetch_oauth2.c b/test/core/security/fetch_oauth2.c
index 767f724b62..e4d422ccc2 100644
--- a/test/core/security/fetch_oauth2.c
+++ b/test/core/security/fetch_oauth2.c
@@ -181,7 +181,8 @@ int main(int argc, char **argv) {
   grpc_credentials_get_request_metadata(creds, &sync.pollset, "", on_oauth2_response, &sync);
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
-  while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
+  while (!sync.is_done)
+    grpc_pollset_work(&sync.pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
 
   grpc_pollset_destroy(&sync.pollset);
diff --git a/test/core/security/json_token_test.c b/test/core/security/json_token_test.c
index b43e0425ee..da57cef15c 100644
--- a/test/core/security/json_token_test.c
+++ b/test/core/security/json_token_test.c
@@ -269,8 +269,8 @@ static void check_jwt_header(grpc_json *header) {
 
 static void check_jwt_claim(grpc_json *claim, const char *expected_audience,
                             const char *expected_scope) {
-  gpr_timespec expiration = {0, 0};
-  gpr_timespec issue_time = {0, 0};
+  gpr_timespec expiration = gpr_time_0(GPR_CLOCK_REALTIME);
+  gpr_timespec issue_time = gpr_time_0(GPR_CLOCK_REALTIME);
   gpr_timespec parsed_lifetime;
   grpc_json *iss = NULL;
   grpc_json *scope = NULL;
diff --git a/test/core/security/jwt_verifier_test.c b/test/core/security/jwt_verifier_test.c
index 46b96d9ecb..98db56c0ef 100644
--- a/test/core/security/jwt_verifier_test.c
+++ b/test/core/security/jwt_verifier_test.c
@@ -1,35 +1,35 @@
 /*
- *
- * 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.
- *
- */
+*
+*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 "src/core/security/jwt_verifier.h"
 
@@ -115,7 +115,7 @@ static const char good_jwk_set[] =
     " ]"
     "}";
 
-static gpr_timespec expected_lifetime = {3600, 0};
+static gpr_timespec expected_lifetime = {3600, 0, GPR_TIMESPAN};
 
 static const char good_google_email_keys_part1[] =
     "{\"e6b5137873db8d2ef81e06a47289e6434ec8a165\": \"-----BEGIN "
@@ -201,9 +201,9 @@ static void test_expired_claims_failure(void) {
   gpr_slice s = gpr_slice_from_copied_string(expired_claims);
   grpc_json *json = grpc_json_parse_string_with_len(
       (char *)GPR_SLICE_START_PTR(s), GPR_SLICE_LENGTH(s));
-  gpr_timespec exp_iat = {100, 0};
-  gpr_timespec exp_exp = {120, 0};
-  gpr_timespec exp_nbf = {60, 0};
+  gpr_timespec exp_iat = {100, 0, GPR_CLOCK_REALTIME};
+  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);
   GPR_ASSERT(claims != NULL);
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 5b55a4da13..0875cfb4fb 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -95,7 +95,8 @@ int main(int argc, char **argv) {
                                         on_metadata_response, &sync);
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
-  while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
+  while (!sync.is_done)
+    grpc_pollset_work(&sync.pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
 
   grpc_credentials_release(creds);
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.c
index e90be5de98..cb073f19c7 100644
--- a/test/core/security/verify_jwt.c
+++ b/test/core/security/verify_jwt.c
@@ -109,7 +109,8 @@ int main(int argc, char **argv) {
                            on_jwt_verification_done, &sync);
 
   gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
-  while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
+  while (!sync.is_done)
+    grpc_pollset_work(&sync.pollset, gpr_inf_future(GPR_CLOCK_REALTIME));
   gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
 
   grpc_jwt_verifier_destroy(verifier);
diff --git a/test/core/statistics/census_log_tests.c b/test/core/statistics/census_log_tests.c
index a34dcf07c4..0f326d28e2 100644
--- a/test/core/statistics/census_log_tests.c
+++ b/test/core/statistics/census_log_tests.c
@@ -310,7 +310,7 @@ static void multiple_writers_single_reader(int circular_log) {
   /* Wait for writers to finish. */
   gpr_mu_lock(&writers_mu);
   while (writers_count != 0) {
-    gpr_cv_wait(&writers_done, &writers_mu, gpr_inf_future);
+    gpr_cv_wait(&writers_done, &writers_mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(&writers_mu);
   gpr_mu_destroy(&writers_mu);
@@ -323,7 +323,7 @@ static void multiple_writers_single_reader(int circular_log) {
   }
   /* wait for reader to finish */
   while (reader.running) {
-    gpr_cv_wait(&reader_done, &reader_mu, gpr_inf_future);
+    gpr_cv_wait(&reader_done, &reader_mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   if (circular_log) {
     /* Assert that there were no out-of-space errors. */
diff --git a/test/core/statistics/trace_test.c b/test/core/statistics/trace_test.c
index b13fd03f70..187884d90f 100644
--- a/test/core/statistics/trace_test.c
+++ b/test/core/statistics/trace_test.c
@@ -136,7 +136,7 @@ static void test_concurrency(void) {
   gpr_mu_lock(&arg.mu);
   while (arg.num_done < NUM_THREADS) {
     gpr_log(GPR_INFO, "num done %d", arg.num_done);
-    gpr_cv_wait(&arg.done, &arg.mu, gpr_inf_future);
+    gpr_cv_wait(&arg.done, &arg.mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(&arg.mu);
   census_tracing_shutdown();
diff --git a/test/core/statistics/window_stats_test.c b/test/core/statistics/window_stats_test.c
index 1c66a87407..9e637ccce9 100644
--- a/test/core/statistics/window_stats_test.c
+++ b/test/core/statistics/window_stats_test.c
@@ -290,8 +290,8 @@ void infinite_interval_test(void) {
   int i;
   const int count = 100000;
   gpr_timespec increment = {0, 0};
-  struct census_window_stats* stats =
-      census_window_stats_create(1, &gpr_inf_future, 10, &kMyStatInfo);
+  struct census_window_stats* stats = census_window_stats_create(
+      1, &gpr_inf_future(GPR_CLOCK_REALTIME), 10, &kMyStatInfo);
   srand(gpr_now(GPR_CLOCK_REALTIME).tv_nsec);
   for (i = 0; i < count; i++) {
     increment.tv_sec = rand() % 21600; /* 6 hours */
diff --git a/test/core/support/cancellable_test.c b/test/core/support/cancellable_test.c
index 2f4b67a785..ca206bd839 100644
--- a/test/core/support/cancellable_test.c
+++ b/test/core/support/cancellable_test.c
@@ -55,7 +55,8 @@ struct test {
 static void thd_body(void *v) {
   struct test *t = v;
   gpr_mu_lock(&t->mu);
-  while (!gpr_cv_cancellable_wait(&t->cv, &t->mu, gpr_inf_future, &t->cancel)) {
+  while (!gpr_cv_cancellable_wait(
+      &t->cv, &t->mu, gpr_inf_future(GPR_CLOCK_REALTIME), &t->cancel)) {
   }
   t->n--;
   if (t->n == 0) {
@@ -125,7 +126,7 @@ static void test(void) {
   GPR_ASSERT(gpr_cancellable_is_cancelled(&t.cancel));
 
   /* Wait for threads to finish. */
-  gpr_event_wait(&t.done, gpr_inf_future);
+  gpr_event_wait(&t.done, gpr_inf_future(GPR_CLOCK_REALTIME));
   GPR_ASSERT(t.n == 0);
 
   /* Test timeout on cv wait for cancelled gpr_cancellable */
diff --git a/test/core/support/sync_test.c b/test/core/support/sync_test.c
index 99be5cdc90..73dd06c96f 100644
--- a/test/core/support/sync_test.c
+++ b/test/core/support/sync_test.c
@@ -81,13 +81,14 @@ void queue_destroy(queue *q) {
 void queue_append(queue *q, int x) {
   gpr_mu_lock(&q->mu);
   /* To wait for a predicate without a deadline, loop on the negation of the
-     predicate, and use gpr_cv_wait(..., gpr_inf_future) inside the loop
+     predicate, and use gpr_cv_wait(..., gpr_inf_future(GPR_CLOCK_REALTIME))
+     inside the loop
      to release the lock, wait, and reacquire on each iteration.  Code that
      makes the condition true should use gpr_cv_broadcast() on the
      corresponding condition variable.  The predicate must be on state
      protected by the lock.  */
   while (q->length == N) {
-    gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future);
+    gpr_cv_wait(&q->non_full, &q->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   if (q->length == 0) { /* Wake threads blocked in queue_remove(). */
     /* It's normal to use gpr_cv_broadcast() or gpr_signal() while
@@ -209,7 +210,7 @@ static void test_create_threads(struct test *m, void (*body)(void *arg)) {
 static void test_wait(struct test *m) {
   gpr_mu_lock(&m->mu);
   while (m->done != 0) {
-    gpr_cv_wait(&m->done_cv, &m->mu, gpr_inf_future);
+    gpr_cv_wait(&m->done_cv, &m->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(&m->mu);
 }
@@ -306,7 +307,7 @@ static void inc_by_turns(void *v /*=m*/) {
   for (i = 0; i != m->iterations; i++) {
     gpr_mu_lock(&m->mu);
     while ((m->counter % m->threads) != id) {
-      gpr_cv_wait(&m->cv, &m->mu, gpr_inf_future);
+      gpr_cv_wait(&m->cv, &m->mu, gpr_inf_future(GPR_CLOCK_REALTIME));
     }
     m->counter++;
     gpr_cv_broadcast(&m->cv);
@@ -379,7 +380,7 @@ static void consumer(void *v /*=m*/) {
   gpr_int64 i;
   int value;
   for (i = 0; i != n; i++) {
-    queue_remove(&m->q, &value, gpr_inf_future);
+    queue_remove(&m->q, &value, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_lock(&m->mu);
   m->counter = n;
@@ -426,7 +427,8 @@ static void refcheck(void *v /*=m*/) {
   struct test *m = v;
   gpr_int64 n = m->iterations * m->threads;
   gpr_int64 i;
-  GPR_ASSERT(gpr_event_wait(&m->event, gpr_inf_future) == (void *)1);
+  GPR_ASSERT(gpr_event_wait(&m->event, gpr_inf_future(GPR_CLOCK_REALTIME)) ==
+             (void *)1);
   GPR_ASSERT(gpr_event_get(&m->event) == (void *)1);
   for (i = 1; i != n; i++) {
     GPR_ASSERT(!gpr_unref(&m->refcount));
diff --git a/test/core/support/thd_test.c b/test/core/support/thd_test.c
index bb3d54a262..7232cd9f5b 100644
--- a/test/core/support/thd_test.c
+++ b/test/core/support/thd_test.c
@@ -79,7 +79,7 @@ static void test(void) {
   }
   gpr_mu_lock(&t.mu);
   while (!t.is_done) {
-    gpr_cv_wait(&t.done_cv, &t.mu, gpr_inf_future);
+    gpr_cv_wait(&t.done_cv, &t.mu, gpr_inf_future(GPR_CLOCK_REALTIME));
   }
   gpr_mu_unlock(&t.mu);
   GPR_ASSERT(t.n == 0);
diff --git a/test/core/support/time_test.c b/test/core/support/time_test.c
index c1dce777b0..29908744ae 100644
--- a/test/core/support/time_test.c
+++ b/test/core/support/time_test.c
@@ -91,10 +91,10 @@ static void ts_to_s(gpr_timespec t,
 static void test_values(void) {
   int i;
 
-  gpr_timespec x = gpr_time_0;
+  gpr_timespec x = gpr_time_0(GPR_CLOCK_REALTIME);
   GPR_ASSERT(x.tv_sec == 0 && x.tv_nsec == 0);
 
-  x = gpr_inf_future;
+  x = gpr_inf_future(GPR_CLOCK_REALTIME);
   fprintf(stderr, "far future ");
   u_to_s(x.tv_sec, 16, 16, &to_fp, stderr);
   fprintf(stderr, "\n");
@@ -103,7 +103,7 @@ static void test_values(void) {
   ts_to_s(x, &to_fp, stderr);
   fprintf(stderr, "\n");
 
-  x = gpr_inf_past;
+  x = gpr_inf_past(GPR_CLOCK_REALTIME);
   fprintf(stderr, "far past   ");
   u_to_s(x.tv_sec, 16, 16, &to_fp, stderr);
   fprintf(stderr, "\n");
@@ -184,51 +184,61 @@ static void test_overflow(void) {
   gpr_timespec x = gpr_time_from_micros(1);
   do {
     x = gpr_time_add(x, x);
-  } while (gpr_time_cmp(x, gpr_inf_future) < 0);
-  GPR_ASSERT(gpr_time_cmp(x, gpr_inf_future) == 0);
+  } while (gpr_time_cmp(x, gpr_inf_future(GPR_TIMESPAN)) < 0);
+  GPR_ASSERT(gpr_time_cmp(x, gpr_inf_future(GPR_TIMESPAN)) == 0);
   x = gpr_time_from_micros(-1);
   do {
     x = gpr_time_add(x, x);
-  } while (gpr_time_cmp(x, gpr_inf_past) > 0);
-  GPR_ASSERT(gpr_time_cmp(x, gpr_inf_past) == 0);
+  } while (gpr_time_cmp(x, gpr_inf_past(GPR_TIMESPAN)) > 0);
+  GPR_ASSERT(gpr_time_cmp(x, gpr_inf_past(GPR_TIMESPAN)) == 0);
 }
 
 static void test_sticky_infinities(void) {
   int i;
   int j;
   int k;
-  static const gpr_timespec *infinity[] = {&gpr_inf_future, &gpr_inf_past};
-  static const gpr_timespec *addend[] = {&gpr_inf_future, &gpr_inf_past,
-                                         &gpr_time_0, NULL};
+  gpr_timespec infinity[2];
+  gpr_timespec addend[3];
+  infinity[0] = gpr_inf_future(GPR_TIMESPAN);
+  infinity[1] = gpr_inf_past(GPR_TIMESPAN);
+  addend[0] = gpr_inf_future(GPR_TIMESPAN);
+  addend[1] = gpr_inf_past(GPR_TIMESPAN);
+  addend[2] = gpr_time_0(GPR_TIMESPAN);
 
   /* Infinities are sticky */
   for (i = 0; i != sizeof(infinity) / sizeof(infinity[0]); i++) {
     for (j = 0; j != sizeof(addend) / sizeof(addend[0]); j++) {
-      if (addend[j] == NULL) {
-        for (k = -200; k <= 200; k++) {
-          gpr_timespec y = gpr_time_from_micros(k * 100000);
-          gpr_timespec x = gpr_time_add(*infinity[i], y);
-          GPR_ASSERT(gpr_time_cmp(x, *infinity[i]) == 0);
-          x = gpr_time_sub(*infinity[i], y);
-          GPR_ASSERT(gpr_time_cmp(x, *infinity[i]) == 0);
-        }
-      } else {
-        gpr_timespec x = gpr_time_add(*infinity[i], *addend[j]);
-        GPR_ASSERT(gpr_time_cmp(x, *infinity[i]) == 0);
-        x = gpr_time_sub(*infinity[i], *addend[j]);
-        GPR_ASSERT(gpr_time_cmp(x, *infinity[i]) == 0);
-      }
+      gpr_timespec x = gpr_time_add(infinity[i], addend[j]);
+      GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
+      x = gpr_time_sub(infinity[i], addend[j]);
+      GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
+    }
+    for (k = -200; k <= 200; k++) {
+      gpr_timespec y = gpr_time_from_micros(k * 100000);
+      gpr_timespec x = gpr_time_add(infinity[i], y);
+      GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
+      x = gpr_time_sub(infinity[i], y);
+      GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
     }
   }
 }
 
 static void test_similar(void) {
-  GPR_ASSERT(1 == gpr_time_similar(gpr_inf_future, gpr_inf_future, gpr_time_0));
-  GPR_ASSERT(1 == gpr_time_similar(gpr_inf_past, gpr_inf_past, gpr_time_0));
-  GPR_ASSERT(0 == gpr_time_similar(gpr_inf_past, gpr_inf_future, gpr_time_0));
-  GPR_ASSERT(0 == gpr_time_similar(gpr_inf_future, gpr_inf_past, gpr_time_0));
+  GPR_ASSERT(1 == gpr_time_similar(gpr_inf_future(GPR_TIMESPAN),
+                                   gpr_inf_future(GPR_TIMESPAN),
+                                   gpr_time_0(GPR_TIMESPAN)));
+  GPR_ASSERT(1 == gpr_time_similar(gpr_inf_past(GPR_TIMESPAN),
+                                   gpr_inf_past(GPR_TIMESPAN),
+                                   gpr_time_0(GPR_TIMESPAN)));
+  GPR_ASSERT(0 == gpr_time_similar(gpr_inf_past(GPR_TIMESPAN),
+                                   gpr_inf_future(GPR_TIMESPAN),
+                                   gpr_time_0(GPR_TIMESPAN)));
+  GPR_ASSERT(0 == gpr_time_similar(gpr_inf_future(GPR_TIMESPAN),
+                                   gpr_inf_past(GPR_TIMESPAN),
+                                   gpr_time_0(GPR_TIMESPAN)));
   GPR_ASSERT(1 == gpr_time_similar(gpr_time_from_micros(10),
-                                   gpr_time_from_micros(10), gpr_time_0));
+                                   gpr_time_from_micros(10),
+                                   gpr_time_0(GPR_TIMESPAN)));
   GPR_ASSERT(1 == gpr_time_similar(gpr_time_from_micros(10),
                                    gpr_time_from_micros(15),
                                    gpr_time_from_micros(10)));
diff --git a/test/core/surface/completion_queue_test.c b/test/core/surface/completion_queue_test.c
index 66136cfe5e..a00e1efb4c 100644
--- a/test/core/surface/completion_queue_test.c
+++ b/test/core/surface/completion_queue_test.c
@@ -52,7 +52,7 @@ static void *create_test_tag(void) {
 static void shutdown_and_destroy(grpc_completion_queue *cc) {
   grpc_event ev;
   grpc_completion_queue_shutdown(cc);
-  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME));
   GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
   grpc_completion_queue_destroy(cc);
 }
@@ -86,7 +86,7 @@ static void test_cq_end_op(void) {
   grpc_cq_begin_op(cc, NULL);
   grpc_cq_end_op(cc, tag, NULL, 1);
 
-  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME));
   GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
   GPR_ASSERT(ev.tag == tag);
   GPR_ASSERT(ev.success);
@@ -100,8 +100,8 @@ static void test_shutdown_then_next_polling(void) {
 
   cc = grpc_completion_queue_create();
   grpc_completion_queue_shutdown(cc);
-  GPR_ASSERT(grpc_completion_queue_next(cc, gpr_inf_past).type ==
-             GRPC_QUEUE_SHUTDOWN);
+  GPR_ASSERT(grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME))
+                 .type == GRPC_QUEUE_SHUTDOWN);
   grpc_completion_queue_destroy(cc);
 }
 
@@ -111,8 +111,8 @@ static void test_shutdown_then_next_with_timeout(void) {
 
   cc = grpc_completion_queue_create();
   grpc_completion_queue_shutdown(cc);
-  GPR_ASSERT(grpc_completion_queue_next(cc, gpr_inf_future).type ==
-             GRPC_QUEUE_SHUTDOWN);
+  GPR_ASSERT(grpc_completion_queue_next(cc, gpr_inf_future(GPR_CLOCK_REALTIME))
+                 .type == GRPC_QUEUE_SHUTDOWN);
   grpc_completion_queue_destroy(cc);
 }
 
@@ -139,7 +139,8 @@ static void test_pluck(void) {
   }
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
-    ev = grpc_completion_queue_pluck(cc, tags[i], gpr_inf_past);
+    ev = grpc_completion_queue_pluck(cc, tags[i],
+                                     gpr_inf_past(GPR_CLOCK_REALTIME));
     GPR_ASSERT(ev.tag == tags[i]);
   }
 
@@ -150,7 +151,7 @@ static void test_pluck(void) {
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
     ev = grpc_completion_queue_pluck(cc, tags[GPR_ARRAY_SIZE(tags) - i - 1],
-                                     gpr_inf_past);
+                                     gpr_inf_past(GPR_CLOCK_REALTIME));
     GPR_ASSERT(ev.tag == tags[GPR_ARRAY_SIZE(tags) - i - 1]);
   }
 
diff --git a/test/core/transport/chttp2/timeout_encoding_test.c b/test/core/transport/chttp2/timeout_encoding_test.c
index 5bfb9cf0ec..b5ab26768b 100644
--- a/test/core/transport/chttp2/timeout_encoding_test.c
+++ b/test/core/transport/chttp2/timeout_encoding_test.c
@@ -124,7 +124,8 @@ void test_decoding(void) {
   decode_suite('S', gpr_time_from_seconds);
   decode_suite('M', gpr_time_from_minutes);
   decode_suite('H', gpr_time_from_hours);
-  assert_decodes_as("1000000000000000000000u", gpr_inf_future);
+  assert_decodes_as("1000000000000000000000u",
+                    gpr_inf_future(GPR_CLOCK_REALTIME));
 }
 
 void test_decoding_fails(void) {