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..39d0310f692ea120c41225f522d2ba6f2e29a505
--- /dev/null
+++ b/base/allocator/allocated_type_log.cc
@@ -0,0 +1,34 @@
+// 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,

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

Is there a reason why you don't put all viable implementations in one file, and
have an ifdef flag select between them?  Do you need to have all code available
for run-time switching??

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

The implementations must be switched in common.gypi for each target binary at
the linking phase.

Multiple implementations are required in one build sequence: _ignore for protoc,
_tcmalloc for chrome.  But, only one viable implementation in one target binary.

We may be able to generate multiple lib* files from a single cc file by #ifdef
and gyp settings, but separated files are easier to understand the situation.

+                           size_t size,
+                           const std::type_info& type) {
+  std::cerr << "Allocated "
+            << 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;
+}