1 files changed, 108 insertions, 0 deletions
diff --git a/test/core/util/memory_counters.cc b/test/core/util/memory_counters.cc
new file mode 100644
index 0000000000..ff85a63803
--- /dev/null
+++ b/test/core/util/memory_counters.cc
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/sync.h>
+
+#include "test/core/util/memory_counters.h"
+
+static struct grpc_memory_counters g_memory_counters;
+static gpr_allocation_functions g_old_allocs;
+
+static void* guard_malloc(size_t size);
+static void* guard_realloc(void* vptr, size_t size);
+static void guard_free(void* vptr);
+
+#ifdef GPR_LOW_LEVEL_COUNTERS
+/* hide these from the microbenchmark atomic stats */
+#define NO_BARRIER_FETCH_ADD(x, sz) \
+  __atomic_fetch_add((x), (sz), __ATOMIC_RELAXED)
+#define NO_BARRIER_LOAD(x) __atomic_load_n((x), __ATOMIC_RELAXED)
+#else
+#define NO_BARRIER_FETCH_ADD(x, sz) gpr_atm_no_barrier_fetch_add(x, sz)
+#define NO_BARRIER_LOAD(x) gpr_atm_no_barrier_load(x)
+#endif
+
+static void* guard_malloc(size_t size) {
+  size_t* ptr;
+  if (!size) return NULL;
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_absolute, (gpr_atm)size);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_relative, (gpr_atm)size);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_allocs_absolute, (gpr_atm)1);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_allocs_relative, (gpr_atm)1);
+  ptr = (size_t*)g_old_allocs.malloc_fn(size + sizeof(size));
+  *ptr++ = size;
+  return ptr;
+}
+
+static void* guard_realloc(void* vptr, size_t size) {
+  size_t* ptr = (size_t*)vptr;
+  if (vptr == NULL) {
+    return guard_malloc(size);
+  }
+  if (size == 0) {
+    guard_free(vptr);
+    return NULL;
+  }
+  --ptr;
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_absolute, (gpr_atm)size);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_relative, -(gpr_atm)*ptr);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_relative, (gpr_atm)size);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_allocs_absolute, (gpr_atm)1);
+  ptr = (size_t*)g_old_allocs.realloc_fn(ptr, size + sizeof(size));
+  *ptr++ = size;
+  return ptr;
+}
+
+static void guard_free(void* vptr) {
+  size_t* ptr = (size_t*)vptr;
+  if (!vptr) return;
+  --ptr;
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_size_relative, -(gpr_atm)*ptr);
+  NO_BARRIER_FETCH_ADD(&g_memory_counters.total_allocs_relative, -(gpr_atm)1);
+  g_old_allocs.free_fn(ptr);
+}
+
+struct gpr_allocation_functions g_guard_allocs = {guard_malloc, NULL,
+                                                  guard_realloc, guard_free};
+
+void grpc_memory_counters_init() {
+  memset(&g_memory_counters, 0, sizeof(g_memory_counters));
+  g_old_allocs = gpr_get_allocation_functions();
+  gpr_set_allocation_functions(g_guard_allocs);
+}
+
+void grpc_memory_counters_destroy() {
+  gpr_set_allocation_functions(g_old_allocs);
+}
+
+struct grpc_memory_counters grpc_memory_counters_snapshot() {
+  struct grpc_memory_counters counters;
+  counters.total_size_relative =
+      NO_BARRIER_LOAD(&g_memory_counters.total_size_relative);
+  counters.total_size_absolute =
+      NO_BARRIER_LOAD(&g_memory_counters.total_size_absolute);
+  counters.total_allocs_relative =
+      NO_BARRIER_LOAD(&g_memory_counters.total_allocs_relative);
+  counters.total_allocs_absolute =
+      NO_BARRIER_LOAD(&g_memory_counters.total_allocs_absolute);
+  return counters;
+}