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..6649b972df7ec6b14c2e9fbe83bdc7ea220c6402
--- /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
+// 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,

[Alexander Potapenko, 2012/08/07 12:05:21]

BTW why do you need |size| and |type| in __op_delete_intercept__?

[Dai Mikurube (NOT FULLTIME), 2012/08/08 06:16:23]

I implemented it with these arguments in the modified Clang.  

They make it easy to manage a simple map from type to total size.  All we should
do is only "map[type] -= size" for object deletion.

We use another map from address to (size, type) in Chromium.  But, they are
reasonable in the Clang compiler.

+                              const std::type_info & type);

[Alexander Potapenko, 2012/08/07 11:56:56]

Please fix the space.

[Dai Mikurube (NOT FULLTIME), 2012/08/08 06:16:23]

Done.

+
+#endif   // BASE_ALLOCATOR_ALLOCATED_TYPE_H_