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

base/allocator/allocated_type_log.cc

Index: base/allocator/allocated_type_log.cc
diff --git a/base/allocator/allocated_type_log.cc b/base/allocator/allocated_type_log.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ffdec7c0d3ba2040093523fc80ec4a8db94984b7
--- /dev/null
+++ b/base/allocator/allocated_type_log.cc
@@ -0,0 +1,32 @@
+// 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.
+
+#include "allocated_type.h"
+#include <iostream>
+
+void* __op_new_intercept__(
+    void* ptr, size_t size, const std::type_info& type) {

[jar (doing other things), 2012/08/02 23:38:30]

nit: one arg per line; indent to paren

[Dai Mikurube (NOT FULLTIME), 2012/08/03 10:01:50]

Done.

+  std::cerr << "Allocated "

[Alexander Potapenko, 2012/08/02 14:57:12]

Have you tried to run this already?
I'm afraid an allocation may occur while you're logging.

[Dai Mikurube (NOT FULLTIME), 2012/08/02 16:14:35]

Actually, it is not called by default common.gypi.  I sometimes turn on them
instead of allocated_type_ignore.cc for debugging.

When I used it, it didn't break anything.  I'm planning to fix it when it
breaks.

+            << size
+            << "bytes as an instance of \""
+            << type.name()
+            << "\" at "
+            << ptr
+            << "."
+            << std::endl;
+  return ptr;
+}
+
+void* __op_delete_intercept__(
+    void* ptr, size_t size, const std::type_info &type) {
+  std::cerr << "Dellocated "
+            << size
+            << "bytes of an instance of \""
+            << type.name()
+            << "\" at "
+            << ptr
+            << "."
+            << std::endl;
+  return ptr;
+}