Annotate benign race

include/grpc/impl/codegen/port_platform.h

@@ -409,4 +409,10 @@ typedef unsigned __int64 uint64_t;
 #define CENSUSAPI GRPCAPI
 #endif
 
+#if defined(__has_feature)
+#if __has_feature(thread_sanitizer)
+#define GPR_ATTRIBUTE_NO_TSAN __attribute__((no_sanitize("thread")))
+#endif
+#endif
+
 #endif /* GRPC_IMPL_CODEGEN_PORT_PLATFORM_H */

test/cpp/microbenchmarks/bm_fullstack_trickle.cc

@@ -105,7 +105,7 @@ class TrickledCHTTP2 : public EndpointPairFixture {
             (double)state.iterations());
   }
 
-  void Log(int64_t iteration) {
+  void Log(int64_t iteration) GPR_ATTRIBUTE_NO_TSAN {
     auto now = gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), start_);
     grpc_chttp2_transport* client =
         reinterpret_cast<grpc_chttp2_transport*>(client_transport_);