Set the default ASan options for executables built with ASan on Linux.

base/debug/sanitizer_options.cc

Index: base/debug/sanitizer_options.cc
diff --git a/base/debug/sanitizer_options.cc b/base/debug/sanitizer_options.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2d8ca3220b7dc45046834c3bef9f37fa9f5a3a66
--- /dev/null
+++ b/base/debug/sanitizer_options.cc
@@ -0,0 +1,49 @@
+// Copyright (c) 2011 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.
+//
+// This file contains the default options for various compiler-based dynamic
+// tools.
+
+#include "build/build_config.h"
+
+// Functions returning default options are declared weak in the tools' runtime
+// libraries. To make the linker pick the strong replacements for those
+// functions from this module, we explicitly force its inclusion by passing
+// -Wl,-u_sanitizer_options_link_helper
+extern "C"
+void _sanitizer_options_link_helper() { }
+
+#if defined(ADDRESS_SANITIZER)
+#if defined(OS_LINUX)
+// Default AddressSanitizer options for the official build. These do not affect
+// tests on buildbots (which don't set GOOGLE_CHROME_BUILD) or non-official
+// Chromium builds.
+//  - disable the strict memcmp() checking (http://crbug.com/178677 and
+//    http://crbug.com/178404).
+//  - set the malloc_context_size (i.e. the size of stack traces collected by
+//    ASan for each malloc/free) to 5. These stack traces tend to accumulate
+//    very fast in applications using JIT (v8 in Chrome's case), see
+//    https://code.google.com/p/address-sanitizer/issues/detail?id=177
+//  - disable the in-process symbolization, which isn't 100% compatible with
+//    the existing sandboxes and doesn't make much sense for stripped official
+//    binaries.
+#if defined(GOOGLE_CHROME_BUILD)
+const char kAsanDefaultOptions[] =
+    "malloc_context_size=5 strict_memcmp=0 symbolize=false";
+#else
+const char *kAsanDefaultOptions = "strict_memcmp=0 symbolize=false";
+#endif  // GOOGLE_CHROME_BUILD
+
+#elif defined(OS_MACOSX)
+const char *kAsanDefaultOptions = "strict_memcmp=0 replace_intrin=0";
+#endif  // OS_LINUX
+
+#if defined(OS_LINUX) || defined(OS_MACOSX)
+extern "C"
+__attribute__((no_sanitize_address))
+const char *__asan_default_options() {
+  return kAsanDefaultOptions;
+}
+#endif  // OS_LINUX || OS_MACOSX
+#endif  // ADDRESS_SANITIZER