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

base/allocator/allocated_type.h

Index: base/allocator/allocated_type.h
diff --git a/base/allocator/allocated_type.h b/base/allocator/allocated_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..8b3063f6180cc12bf23e01e082966c360a6ffc7f
--- /dev/null
+++ b/base/allocator/allocated_type.h
@@ -0,0 +1,23 @@
+// Copyright (c) 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_ALLOCATED_TYPE_H_
+#define BASE_ALLOCATOR_ALLOCATED_TYPE_H_
+
+#include <cstddef>
+#include <typeinfo>
+
+// These functions are inserted around all 'new' and 'delete' expressions by

[jar (doing other things), 2012/08/08 23:21:04]

Can you indicate that this is only done or Clang? (assuming I correctly
understood that you only hacked that compiler).

Is it possible to clarify this further by either naming the file for the
platform (android?), or by surrounding the declarations in an ifdef for that
platform?

[Dai Mikurube (NOT FULLTIME), 2012/08/09 10:23:54]

Added a comment and #if defined(__linux__) && defined(__clang__).

I chose #if (not filename) since we can extend it easily to other platforms,
e.g. Mac, though I haven't tested on other platforms.

+// the compiler option '-fintercept-allocation-functions' introduced in
+// http://crrev.com/149572.
+
+void* __op_new_intercept__(void* ptr,
+                           size_t size,
+                           const std::type_info& type);
+
+void* __op_delete_intercept__(void* ptr,
+                              size_t size,
+                              const std::type_info& type);
+
+#endif   // BASE_ALLOCATOR_ALLOCATED_TYPE_H_