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

base/debug/sanitizer_options.cc

+// 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)
+// Default options for AddressSanitizer in various configurations:
+//   strict_memcmp=1 - disable the strict memcmp() checking
+//     (http://crbug.com/178677 and http://crbug.com/178404).
+//   malloc_context_size=5 - limit the size of stack traces collected by ASan
+//     for each malloc/free by 5 frames. 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
+//   symbolize=false - disable the in-process symbolization, which isn't 100%
+//     compatible with the existing sandboxes and doesn't make much sense for
+//     stripped official binaries.
+//   legacy_pthread_cond=1 - run in the libpthread 2.2.5 compatibility mode to
+//     work around libGL.so using the obsolete API, see
+//     http://crbug.com/341805. This may break if pthread_cond_t objects are
+//     accessed by both instrumented and non-instrumented binaries (e.g. if
+//     they reside in shared memory). This option is going to be deprecated in
+//     upstream AddressSanitizer and must not be used anywhere except the
+//     official builds.
+//   replace_intrin=0 - do not intercept memcpy(), memmove() and memset() to
+//     work around http://crbug.com/162461 (ASan report in OpenCL on Mac).
+#if defined(OS_LINUX)
+#if defined(GOOGLE_CHROME_BUILD)
+// 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.
+const char kAsanDefaultOptions[] =
+    "legacy_pthread_cond=1 malloc_context_size=5 strict_memcmp=0 "
+    "symbolize=false";
+#else
+// Default AddressSanitizer options for buildbots and non-official builds.
+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