4 files changed, 23 insertions, 21 deletions

diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 0ca7688ca4..b32e8e7d4c 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -198,11 +198,6 @@ void grpc_transport_destroy_stream(grpc_exec_ctx *exec_ctx,
                                     then_schedule_closure);
 }
 
-char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
-                              grpc_transport *transport) {
-  return transport->vtable->get_peer(exec_ctx, transport);
-}
-
 grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
                                            grpc_transport *transport) {
   return transport->vtable->get_endpoint(exec_ctx, transport);
@@ -215,24 +210,24 @@ grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
 // is a function that must always unref cancel_error
 // though it lives in lib, it handles transport stream ops sure
 // it's grpc_transport_stream_op_batch_finish_with_failure
-
 void grpc_transport_stream_op_batch_finish_with_failure(
     grpc_exec_ctx *exec_ctx, grpc_transport_stream_op_batch *batch,
-    grpc_error *error) {
+    grpc_error *error, grpc_call_combiner *call_combiner) {
   if (batch->send_message) {
     grpc_byte_stream_destroy(exec_ctx,
                              batch->payload->send_message.send_message);
   }
   if (batch->recv_message) {
-    GRPC_CLOSURE_SCHED(exec_ctx,
-                       batch->payload->recv_message.recv_message_ready,
-                       GRPC_ERROR_REF(error));
+    GRPC_CALL_COMBINER_START(exec_ctx, call_combiner,
+                             batch->payload->recv_message.recv_message_ready,
+                             GRPC_ERROR_REF(error),
+                             "failing recv_message_ready");
   }
   if (batch->recv_initial_metadata) {
-    GRPC_CLOSURE_SCHED(
-        exec_ctx,
+    GRPC_CALL_COMBINER_START(
+        exec_ctx, call_combiner,
         batch->payload->recv_initial_metadata.recv_initial_metadata_ready,
-        GRPC_ERROR_REF(error));
+        GRPC_ERROR_REF(error), "failing recv_initial_metadata_ready");
   }
   GRPC_CLOSURE_SCHED(exec_ctx, batch->on_complete, error);
   if (batch->cancel_stream) {
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index 099138ea14..fbf5dcb8b5 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -22,6 +22,7 @@
 #include <stddef.h>
 
 #include "src/core/lib/channel/context.h"
+#include "src/core/lib/iomgr/call_combiner.h"
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/polling_entity.h"
 #include "src/core/lib/iomgr/pollset.h"
@@ -152,6 +153,9 @@ struct grpc_transport_stream_op_batch_payload {
     /** Iff send_initial_metadata != NULL, flags associated with
         send_initial_metadata: a bitfield of GRPC_INITIAL_METADATA_xxx */
     uint32_t send_initial_metadata_flags;
+    // If non-NULL, will be set by the transport to the peer string
+    // (a char*, which the caller takes ownership of).
+    gpr_atm *peer_string;
   } send_initial_metadata;
 
   struct {
@@ -176,6 +180,9 @@ struct grpc_transport_stream_op_batch_payload {
     // immediately available.  This may be a signal that we received a
     // Trailers-Only response.
     bool *trailing_metadata_available;
+    // If non-NULL, will be set by the transport to the peer string
+    // (a char*, which the caller takes ownership of).
+    gpr_atm *peer_string;
   } recv_initial_metadata;
 
   struct {
@@ -293,7 +300,7 @@ void grpc_transport_destroy_stream(grpc_exec_ctx *exec_ctx,
 
 void grpc_transport_stream_op_batch_finish_with_failure(
     grpc_exec_ctx *exec_ctx, grpc_transport_stream_op_batch *op,
-    grpc_error *error);
+    grpc_error *error, grpc_call_combiner *call_combiner);
 
 char *grpc_transport_stream_op_batch_string(grpc_transport_stream_op_batch *op);
 char *grpc_transport_op_string(grpc_transport_op *op);
@@ -332,10 +339,6 @@ void grpc_transport_close(grpc_transport *transport);
 /* Destroy the transport */
 void grpc_transport_destroy(grpc_exec_ctx *exec_ctx, grpc_transport *transport);
 
-/* Get the transports peer */
-char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
-                              grpc_transport *transport);
-
 /* Get the endpoint used by \a transport */
 grpc_endpoint *grpc_transport_get_endpoint(grpc_exec_ctx *exec_ctx,
                                            grpc_transport *transport);
diff --git a/src/core/lib/transport/transport_impl.h b/src/core/lib/transport/transport_impl.h
index fc772c6dd1..bbae69c223 100644
--- a/src/core/lib/transport/transport_impl.h
+++ b/src/core/lib/transport/transport_impl.h
@@ -59,9 +59,6 @@ typedef struct grpc_transport_vtable {
   /* implementation of grpc_transport_destroy */
   void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_transport *self);
 
-  /* implementation of grpc_transport_get_peer */
-  char *(*get_peer)(grpc_exec_ctx *exec_ctx, grpc_transport *self);
-
   /* implementation of grpc_transport_get_endpoint */
   grpc_endpoint *(*get_endpoint)(grpc_exec_ctx *exec_ctx, grpc_transport *self);
 } grpc_transport_vtable;
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index 7b18229ba6..409a6c4103 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -112,6 +112,13 @@ char *grpc_transport_stream_op_batch_string(
     gpr_strvec_add(&b, tmp);
   }
 
+  if (op->collect_stats) {
+    gpr_strvec_add(&b, gpr_strdup(" "));
+    gpr_asprintf(&tmp, "COLLECT_STATS:%p",
+                 op->payload->collect_stats.collect_stats);
+    gpr_strvec_add(&b, tmp);
+  }
+
   out = gpr_strvec_flatten(&b, NULL);
   gpr_strvec_destroy(&b);