Add a postbuild action for executables built with ASan on Mac OS.

build/mac/asan.gyp

+# 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.
+
+{
+   'targets': [
+     {
+       'target_name': 'asan_dynamic_runtime',
+       'type': 'none',
+       'variables': {
+         # Every target is going to depend on asan_dynamic_runtime, so allow
+         # this one to depend on itself.
+         'prune_self_dependency': 1,
+         # Path is relative to this GYP file.
+         'asan_rtl_mask_path':
+             '../../third_party/llvm-build/Release+Asserts/lib/clang/*/lib/darwin/libclang_rt.asan_osx_dynamic.dylib',

[Mark Mentovai, 2013/03/06 17:03:19]

I don’t like this at all.

How often does the clang version number change? Can you just hard-code it? Or
can we talk someone who deals with the clang rolls (like Nico?) to give us a
“current” symbolic link or something?

+       },
+
+       'copies': [
+         {
+           'destination': '<(PRODUCT_DIR)',
+           'files': [
+             '<!(/bin/ls <(asan_rtl_mask_path))',
+           ],
+         },
+       ],
+     },
+   ],
+}