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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(LEAK_SANITIZER) || \
defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
defined(UNDEFINED_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.
#define SANITIZER_HOOK_ATTRIBUTE \
extern "C" \
__attribute__((no_sanitize("address", "memory", "thread", "undefined"))) \
__attribute__((visibility("default"))) \
__attribute__((used))
#endif
#if defined(ADDRESS_SANITIZER)
// Default options for AddressSanitizer in various configurations:
// 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=/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports
// 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.
// symbolize=1 - enable in-process symbolization.
// external_symbolizer_path=... - provides the path to llvm-symbolizer
// relative to the main executable
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
const char kAsanDefaultOptions[] =
"check_printf=1 use_sigaltstack=1 strip_path_prefix=/../../ "
"fast_unwind_on_fatal=1 detect_stack_use_after_return=1 "
"symbolize=1 detect_leaks=0 allow_user_segv_handler=1 "
"external_symbolizer_path=%d/../../third_party/llvm-build/Release+Asserts/"
"bin/llvm-symbolizer";
#elif defined(OS_APPLE)
const char* kAsanDefaultOptions =
"check_printf=1 use_sigaltstack=1 strip_path_prefix=/../../ "
"fast_unwind_on_fatal=1 detect_stack_use_after_return=1 ";
#elif defined(OS_WIN)
const char* kAsanDefaultOptions =
"check_printf=1 use_sigaltstack=1 strip_path_prefix=\\..\\..\\ "
"fast_unwind_on_fatal=1 detect_stack_use_after_return=1 "
"symbolize=1 external_symbolizer_path=%d/../../third_party/"
"llvm-build/Release+Asserts/bin/llvm-symbolizer.exe";
#endif // defined(OS_LINUX) || defined(OS_CHROMEOS)
#if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_APPLE) || \
defined(OS_WIN)
// Allow NaCl to override the default asan options.
extern const char* kAsanDefaultOptionsNaCl;
__attribute__((weak)) const char* kAsanDefaultOptionsNaCl = nullptr;
SANITIZER_HOOK_ATTRIBUTE const char *__asan_default_options() {
if (kAsanDefaultOptionsNaCl)
return kAsanDefaultOptionsNaCl;
return kAsanDefaultOptions;
}
extern char kASanDefaultSuppressions[];
SANITIZER_HOOK_ATTRIBUTE const char *__asan_default_suppressions() {
return kASanDefaultSuppressions;
}
#endif // defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_APPLE) ||
// defined(OS_WIN)
#endif // ADDRESS_SANITIZER
#if defined(THREAD_SANITIZER) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
// 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=/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports.
// external_symbolizer_path=... - provides the path to llvm-symbolizer
// relative to the main executable
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=/../../ external_symbolizer_path=%d/../../third_party/"
"llvm-build/Release+Asserts/bin/llvm-symbolizer";
SANITIZER_HOOK_ATTRIBUTE const char *__tsan_default_options() {
return kTsanDefaultOptions;
}
extern char kTSanDefaultSuppressions[];
SANITIZER_HOOK_ATTRIBUTE const char *__tsan_default_suppressions() {
return kTSanDefaultSuppressions;
}
#endif // defined(THREAD_SANITIZER) && (defined(OS_LINUX) ||
// defined(OS_CHROMEOS))
#if defined(MEMORY_SANITIZER)
// Default options for MemorySanitizer:
// strip_path_prefix=/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports.
// external_symbolizer_path=... - provides the path to llvm-symbolizer
// relative to the main executable
const char kMsanDefaultOptions[] =
"strip_path_prefix=/../../ "
#if !defined(OS_APPLE)
"external_symbolizer_path=%d/../../third_party/llvm-build/Release+Asserts/"
"bin/llvm-symbolizer"
#endif
;
SANITIZER_HOOK_ATTRIBUTE const char *__msan_default_options() {
return kMsanDefaultOptions;
}
#endif // MEMORY_SANITIZER
#if defined(LEAK_SANITIZER)
// Default options for LeakSanitizer:
// print_suppressions=1 - print the list of matched suppressions.
// strip_path_prefix=/../../ - prefixes up to and including this
// substring will be stripped from source file paths in symbolized reports.
// external_symbolizer_path=... - provides the path to llvm-symbolizer
// relative to the main executable
// use_poisoned=1 - Scan poisoned memory. This is useful for Oilpan (C++
// garbage collection) which wants to exclude its managed memory from being
// reported as leaks (through root regions) and also temporarily poisons
// memory regions before calling destructors of objects to avoid destructors
// cross-referencing memory in other objects. Main thread termination in
// Blink is not graceful and leak checks may be emitted at any time, which
// means that the garbage collector may be in a state with poisoned memory,
// leading to false-positive reports.
const char kLsanDefaultOptions[] =
"print_suppressions=1 strip_path_prefix=/../../ "
"use_poisoned=1 "
#if !defined(OS_APPLE)
"external_symbolizer_path=%d/../../third_party/llvm-build/Release+Asserts/"
"bin/llvm-symbolizer "
#endif
#if defined(ARCH_CPU_64_BITS)
// When pointer compression in V8 is enabled the external pointers in the
// heap are guaranteed to be only 4 bytes aligned. So we need this option
// in order to ensure that LSAN will find all the external pointers.
// TODO(crbug.com/328552): see updates from 2019.
"use_unaligned=1 "
#endif // ARCH_CPU_64_BITS
;
SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_options() {
return kLsanDefaultOptions;
}
extern char kLSanDefaultSuppressions[];
SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_suppressions() {
return kLSanDefaultSuppressions;
}
#endif // LEAK_SANITIZER
#if defined(UNDEFINED_SANITIZER)
// Default options for UndefinedBehaviorSanitizer:
// print_stacktrace=1 - print the stacktrace when UBSan reports an error.
const char kUbsanDefaultOptions[] =
"print_stacktrace=1 strip_path_prefix=/../../ "
#if !defined(OS_APPLE)
"external_symbolizer_path=%d/../../third_party/llvm-build/Release+Asserts/"
"bin/llvm-symbolizer"
#endif
;
SANITIZER_HOOK_ATTRIBUTE const char* __ubsan_default_options() {
return kUbsanDefaultOptions;
}
#endif // UNDEFINED_SANITIZER
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