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// Copyright 2014 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"
#if defined(ADDRESS_SANITIZER) && defined(OS_MACOSX)
#include <crt_externs.h> // for _NSGetArgc, _NSGetArgv
#include <string.h>
#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
// 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() { }
// The callbacks we define here will be called from the sanitizer runtime, but
// aren't referenced from the Chrome executable. We must ensure that those
// callbacks are not sanitizer-instrumented, and that they aren't stripped by
// the linker.
extern "C" \
__attribute__((no_sanitize_address)) \
__attribute__((no_sanitize_memory)) \
__attribute__((no_sanitize_thread)) \
__attribute__((visibility("default"))) \
// Default options for AddressSanitizer in various configurations:
// strict_memcmp=1 - disable the strict memcmp() checking
// ( and
// 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
// 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 using the obsolete API, see
// 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 (ASan report in OpenCL on Mac).
// check_printf=1 - check the memory accesses to printf (and other formatted
// output routines) arguments.
// use_sigaltstack=1 - handle signals on an alternate signal stack. Useful
// for stack overflow detection.
// strip_path_prefix=Release/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports
// (if symbolize=true, which is set when running with LeakSanitizer).
// fast_unwind_on_fatal=1 - use the fast (frame-pointer-based) stack unwinder
// to print error reports. V8 doesn't generate debug info for the JIT code,
// so the slow unwinder may not work properly.
// detect_stack_use_after_return=1 - use fake stack to delay the reuse of
// stack allocations and detect stack-use-after-return errors.
#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.
const char kAsanDefaultOptions[] =
"legacy_pthread_cond=1 malloc_context_size=5 strict_memcmp=0 "
"symbolize=false check_printf=1 use_sigaltstack=1 detect_leaks=0 "
"strip_path_prefix=Release/../../ fast_unwind_on_fatal=1";
// Default AddressSanitizer options for buildbots and non-official builds.
const char *kAsanDefaultOptions =
"strict_memcmp=0 symbolize=false check_printf=1 use_sigaltstack=1 "
"detect_leaks=0 strip_path_prefix=Release/../../ fast_unwind_on_fatal=1 "
"detect_stack_use_after_return=1 ";
#elif defined(OS_MACOSX)
const char *kAsanDefaultOptions =
"strict_memcmp=0 replace_intrin=0 check_printf=1 use_sigaltstack=1 "
"strip_path_prefix=Release/../../ fast_unwind_on_fatal=1 "
"detect_stack_use_after_return=1 detect_odr_violation=0 ";
static const char kNaClDefaultOptions[] = "handle_segv=0";
static const char kNaClFlag[] = "--type=nacl-loader";
#endif // OS_LINUX
#if defined(OS_LINUX) || defined(OS_MACOSX)
SANITIZER_HOOK_ATTRIBUTE const char *__asan_default_options() {
#if defined(OS_MACOSX)
char*** argvp = _NSGetArgv();
int* argcp = _NSGetArgc();
if (!argvp || !argcp) return kAsanDefaultOptions;
char** argv = *argvp;
int argc = *argcp;
for (int i = 0; i < argc; ++i) {
if (strcmp(argv[i], kNaClFlag) == 0) {
return kNaClDefaultOptions;
return kAsanDefaultOptions;
#endif // OS_LINUX || OS_MACOSX
#if defined(THREAD_SANITIZER) && defined(OS_LINUX)
// Default options for ThreadSanitizer in various configurations:
// detect_deadlocks=1 - enable deadlock (lock inversion) detection.
// second_deadlock_stack=1 - more verbose deadlock reports.
// report_signal_unsafe=0 - do not report async-signal-unsafe functions
// called from signal handlers.
// report_thread_leaks=0 - do not report unjoined threads at the end of
// the program execution.
// print_suppressions=1 - print the list of matched suppressions.
// history_size=7 - make the history buffer proportional to 2^7 (the maximum
// value) to keep more stack traces.
// strip_path_prefix=Release/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports.
const char kTsanDefaultOptions[] =
"detect_deadlocks=1 second_deadlock_stack=1 report_signal_unsafe=0 "
"report_thread_leaks=0 print_suppressions=1 history_size=7 "
"strip_path_prefix=Release/../../ ";
SANITIZER_HOOK_ATTRIBUTE const char *__tsan_default_options() {
return kTsanDefaultOptions;
extern "C" char kTSanDefaultSuppressions[];
SANITIZER_HOOK_ATTRIBUTE const char *__tsan_default_suppressions() {
return kTSanDefaultSuppressions;
#if defined(LEAK_SANITIZER)
// Default options for LeakSanitizer:
// print_suppressions=1 - print the list of matched suppressions.
// strip_path_prefix=Release/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports.
const char kLsanDefaultOptions[] =
"print_suppressions=1 strip_path_prefix=Release/../../ ";
SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_options() {
return kLsanDefaultOptions;
extern "C" char kLSanDefaultSuppressions[];
SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_suppressions() {
return kLSanDefaultSuppressions;