From 958f4535c435796286432272d7a066a42c3c03a9 Mon Sep 17 00:00:00 2001
From: Yash Tibrewal <yashkt@google.com>
Date: Mon, 21 Jan 2019 19:15:35 -0800
Subject: [PATCH] Fix TSAN issue in filter_status_code test

---
 test/core/end2end/tests/filter_status_code.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/core/end2end/tests/filter_status_code.cc b/test/core/end2end/tests/filter_status_code.cc
index 5ffc3d00a3f..6d85c1b0724 100644
--- a/test/core/end2end/tests/filter_status_code.cc
+++ b/test/core/end2end/tests/filter_status_code.cc
@@ -260,6 +260,7 @@ typedef struct final_status_data {
 static void server_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   auto* data = static_cast<final_status_data*>(elem->call_data);
+  gpr_mu_lock(&g_mu);
   if (data->call == g_server_call_stack) {
     if (op->send_initial_metadata) {
       auto* batch = op->payload->send_initial_metadata.send_initial_metadata;
@@ -270,6 +271,7 @@ static void server_start_transport_stream_op_batch(
       }
     }
   }
+  gpr_mu_unlock(&g_mu);
   grpc_call_next_op(elem, op);
 }