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//===-- tsan_flags.cpp ----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_flags.h"
#include "sanitizer_common/sanitizer_flag_parser.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "tsan_interface.h"
#include "tsan_mman.h"
#include "tsan_rtl.h"
#include "ubsan/ubsan_flags.h"
#if SANITIZER_APPLE
namespace __sanitizer {
template <>
inline bool FlagHandler<LockDuringWriteSetting>::Parse(const char *value) {
if (internal_strcmp(value, "on") == 0) {
*t_ = kLockDuringAllWrites;
return true;
}
if (internal_strcmp(value, "disable_for_current_process") == 0) {
*t_ = kNoLockDuringWritesCurrentProcess;
return true;
}
if (internal_strcmp(value, "disable_for_all_processes") == 0) {
*t_ = kNoLockDuringWritesAllProcesses;
return true;
}
Printf("ERROR: Invalid value for signal handler option: '%s'\n", value);
return false;
}
template <>
inline bool FlagHandler<LockDuringWriteSetting>::Format(char *buffer,
uptr size) {
switch (*t_) {
case kLockDuringAllWrites:
return FormatString(buffer, size, "on");
case kNoLockDuringWritesCurrentProcess:
return FormatString(buffer, size, "disable_for_current_process");
case kNoLockDuringWritesAllProcesses:
return FormatString(buffer, size, "disable_for_all_processes");
}
}
} // namespace __sanitizer
#endif
namespace __tsan {
// Can be overriden in frontend.
#ifdef TSAN_EXTERNAL_HOOKS
extern "C" const char *__tsan_default_options();
#else
SANITIZER_WEAK_DEFAULT_IMPL
const char *__tsan_default_options() {
return "";
}
#endif
void Flags::SetDefaults() {
#define TSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
#include "tsan_flags.inc"
#undef TSAN_FLAG
// DDFlags
second_deadlock_stack = false;
}
void RegisterTsanFlags(FlagParser *parser, Flags *f) {
#define TSAN_FLAG(Type, Name, DefaultValue, Description) \
RegisterFlag(parser, #Name, Description, &f->Name);
#include "tsan_flags.inc"
#undef TSAN_FLAG
// DDFlags
RegisterFlag(parser, "second_deadlock_stack",
"Report where each mutex is locked in deadlock reports",
&f->second_deadlock_stack);
}
void InitializeFlags(Flags *f, const char *env, const char *env_option_name) {
SetCommonFlagsDefaults();
{
// Override some common flags defaults.
CommonFlags cf;
cf.CopyFrom(*common_flags());
cf.external_symbolizer_path = GetEnv("TSAN_SYMBOLIZER_PATH");
cf.allow_addr2line = true;
if (SANITIZER_GO) {
// Does not work as expected for Go: runtime handles SIGABRT and crashes.
cf.abort_on_error = false;
// Go does not have mutexes.
cf.detect_deadlocks = false;
}
cf.print_suppressions = false;
cf.stack_trace_format = " #%n %f %S %M";
cf.exitcode = 66;
cf.intercept_tls_get_addr = true;
OverrideCommonFlags(cf);
}
f->SetDefaults();
FlagParser parser;
RegisterTsanFlags(&parser, f);
RegisterCommonFlags(&parser);
#if TSAN_CONTAINS_UBSAN
__ubsan::Flags *uf = __ubsan::flags();
uf->SetDefaults();
FlagParser ubsan_parser;
__ubsan::RegisterUbsanFlags(&ubsan_parser, uf);
RegisterCommonFlags(&ubsan_parser);
#endif
// Let a frontend override.
parser.ParseString(__tsan_default_options());
#if TSAN_CONTAINS_UBSAN
const char *ubsan_default_options = __ubsan_default_options();
ubsan_parser.ParseString(ubsan_default_options);
#endif
// Override from command line.
parser.ParseString(env, env_option_name);
#if TSAN_CONTAINS_UBSAN
ubsan_parser.ParseStringFromEnv("UBSAN_OPTIONS");
#endif
// Check flags.
if (!f->report_bugs) {
f->report_thread_leaks = false;
f->report_destroy_locked = false;
f->report_signal_unsafe = false;
}
InitializeCommonFlags();
if (Verbosity()) ReportUnrecognizedFlags();
if (common_flags()->help) parser.PrintFlagDescriptions();
if (f->io_sync < 0 || f->io_sync > 2) {
Printf("ThreadSanitizer: incorrect value for io_sync"
" (must be [0..2])\n");
Die();
}
}
} // namespace __tsan
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