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

base/allocator/type_profiler.h

Index: base/allocator/type_profiler.h
diff --git a/base/allocator/type_profiler.h b/base/allocator/type_profiler.h
new file mode 100644
index 0000000000000000000000000000000000000000..9bddb280806119010d1d79510dc1fd9667cbd382
--- /dev/null
+++ b/base/allocator/type_profiler.h
@@ -0,0 +1,40 @@
+// 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.
+
+#ifndef BASE_ALLOCATOR_TYPE_PROFILER_H_
+#define BASE_ALLOCATOR_TYPE_PROFILER_H_
+
+#if defined(TYPE_PROFILING)
+
+#include <cstddef>  // for size_t

[Ryan Sleevi, 2012/09/13 09:13:25]

Change this to <stddef.h>

<cstddef> is only required to declare std::size_t, which you're not using here

[Dai Mikurube (NOT FULLTIME), 2012/09/13 10:45:04]

Done.

+#include <typeinfo>  // for std::typeinfo
+
+namespace base {
+namespace type_profiler {
+
+typedef void* InterceptFunction(void*, size_t, const std::type_info&);
+
+class InterceptFunctions {
+ public:
+  // It must be called only once in a process while it is in single-thread.
+  // For now, ContentMainRunnerImpl::Initialize is the only supposed caller
+  // of this function except for single-threaded unit tests.
+  static void SetFunctions(InterceptFunction* new_intercept,
+                           InterceptFunction* delete_intercept);
+
+ private:
+  friend class TypeProfilerTest;
+
+  // These functions are not thread safe.
+  // They must be used only from single-threaded unit tests.
+  static void ResetFunctions();
+  static bool IsAvailable();
+};
+
+}  // namespace type_profiler
+}  // namespace base
+
+#endif  // defined(TYPE_PROFILING)
+
+#endif  // BASE_ALLOCATOR_TYPE_PROFILER_H_