Type profiler by intercepting 'new' and 'delete' expressions.

base/allocator/allocated_type_profiler.cc

Index: base/allocator/allocated_type_profiler.cc
diff --git a/base/allocator/allocated_type_profiler.cc b/base/allocator/allocated_type_profiler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c614f6d90baa2a6982a3ec869df4593430568603
--- /dev/null
+++ b/base/allocator/allocated_type_profiler.cc
@@ -0,0 +1,54 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/allocator/allocated_type_profiler.h"
+
+#if defined(PROFILING_ALLOCATED_TYPE)
+
+namespace base {
+namespace allocated_type_profiler {
+
+static InterceptFunction* g_new_intercept = NULL;
+static InterceptFunction* g_delete_intercept = NULL;
+
+void SetNewInterceptFunction(InterceptFunction* new_intercept) {
+  g_new_intercept = new_intercept;
+}
+
+void SetDeleteInterceptFunction(InterceptFunction* delete_intercept) {
+  g_delete_intercept = delete_intercept;
+}
+
+void SetInterceptFunctions(InterceptFunction* new_intercept,
+                           InterceptFunction* delete_intercept) {
+  SetNewInterceptFunction(new_intercept);
+  SetDeleteInterceptFunction(delete_intercept);
+}
+
+}  // namespace allocated_type_profiler
+}  // namespace base
+
+void* __op_new_intercept__(void* ptr,
+                           size_t size,
+                           const std::type_info& type) {
+  base::allocated_type_profiler::InterceptFunction* new_intercept =
+      base::allocated_type_profiler::g_new_intercept;
+  if (new_intercept) {
+    return new_intercept(ptr, size, type);
+  }
+  return ptr;
+}
+
+void* __op_delete_intercept__(void* ptr,
+                              size_t size,
+                              const std::type_info& type) {
+  base::allocated_type_profiler::InterceptFunction* delete_intercept =
+      base::allocated_type_profiler::g_delete_intercept;
+  if (delete_intercept) {
+    return delete_intercept(ptr, size, type);
+  }
+  return ptr;
+}
+
+#endif  // defined(PROFILING_ALLOCATED_TYPE)