s/realloc/gpr_realloc to fix mem bug

src/core/lib/iomgr/error.c

@@ -210,7 +210,7 @@ static uint8_t get_placement(grpc_error **err, size_t size) {
   uint8_t slots = (uint8_t)(size / sizeof(intptr_t));
   if ((*err)->arena_size + slots > (*err)->arena_capacity) {
     (*err)->arena_capacity = (uint8_t)(3 * (*err)->arena_capacity / 2);
-    *err = realloc(
+    *err = gpr_realloc(
         *err, sizeof(grpc_error) + (*err)->arena_capacity * sizeof(intptr_t));
   }
   uint8_t placement = (*err)->arena_size;

test/cpp/microbenchmarks/bm_error.cc

@@ -72,12 +72,14 @@ static void BM_ErrorCreateAndSetStatus(benchmark::State& state) {
 BENCHMARK(BM_ErrorCreateAndSetStatus);
 
 static void BM_ErrorCreateAndSetIntAndStr(benchmark::State& state) {
+  TrackCounters track_counters;
   while (state.KeepRunning()) {
     GRPC_ERROR_UNREF(grpc_error_set_str(
         grpc_error_set_int(GRPC_ERROR_CREATE("GOAWAY received"),
                            GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)0),
         GRPC_ERROR_STR_RAW_BYTES, "raw bytes"));
   }
+  track_counters.Finish(state);
 }
 BENCHMARK(BM_ErrorCreateAndSetIntAndStr);