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//===-- sanitizer_mutex_test.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/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_common/sanitizer_mutex.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_pthread_wrappers.h"
#include "gtest/gtest.h"
#include <string.h>
namespace __sanitizer {
template<typename MutexType>
class TestData {
public:
explicit TestData(MutexType *mtx)
: mtx_(mtx) {
for (int i = 0; i < kSize; i++)
data_[i] = 0;
}
void Write() {
Lock l(mtx_);
T v0 = data_[0];
for (int i = 0; i < kSize; i++) {
mtx_->CheckLocked();
CHECK_EQ(data_[i], v0);
data_[i]++;
}
}
void TryWrite() {
if (!mtx_->TryLock())
return;
T v0 = data_[0];
for (int i = 0; i < kSize; i++) {
mtx_->CheckLocked();
CHECK_EQ(data_[i], v0);
data_[i]++;
}
mtx_->Unlock();
}
void Read() {
ReadLock l(mtx_);
T v0 = data_[0];
for (int i = 0; i < kSize; i++) {
mtx_->CheckReadLocked();
CHECK_EQ(data_[i], v0);
}
}
void Backoff() {
volatile T data[kSize] = {};
for (int i = 0; i < kSize; i++) {
data[i]++;
CHECK_EQ(data[i], 1);
}
}
private:
typedef GenericScopedLock<MutexType> Lock;
typedef GenericScopedReadLock<MutexType> ReadLock;
static const int kSize = 64;
typedef u64 T;
MutexType *mtx_;
char pad_[kCacheLineSize];
T data_[kSize];
};
const int kThreads = 8;
#if SANITIZER_DEBUG
const int kIters = 16*1024;
#else
const int kIters = 64*1024;
#endif
template<typename MutexType>
static void *lock_thread(void *param) {
TestData<MutexType> *data = (TestData<MutexType>*)param;
for (int i = 0; i < kIters; i++) {
data->Write();
data->Backoff();
}
return 0;
}
template<typename MutexType>
static void *try_thread(void *param) {
TestData<MutexType> *data = (TestData<MutexType>*)param;
for (int i = 0; i < kIters; i++) {
data->TryWrite();
data->Backoff();
}
return 0;
}
template <typename MutexType>
static void *read_write_thread(void *param) {
TestData<MutexType> *data = (TestData<MutexType> *)param;
for (int i = 0; i < kIters; i++) {
if ((i % 10) == 0)
data->Write();
else
data->Read();
data->Backoff();
}
return 0;
}
template<typename MutexType>
static void check_locked(MutexType *mtx) {
GenericScopedLock<MutexType> l(mtx);
mtx->CheckLocked();
}
TEST(SanitizerCommon, SpinMutex) {
SpinMutex mtx;
mtx.Init();
TestData<SpinMutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, lock_thread<SpinMutex>, &data);
for (int i = 0; i < kThreads; i++)
PTHREAD_JOIN(threads[i], 0);
}
TEST(SanitizerCommon, SpinMutexTry) {
SpinMutex mtx;
mtx.Init();
TestData<SpinMutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, try_thread<SpinMutex>, &data);
for (int i = 0; i < kThreads; i++)
PTHREAD_JOIN(threads[i], 0);
}
TEST(SanitizerCommon, Mutex) {
Mutex mtx;
TestData<Mutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, read_write_thread<Mutex>, &data);
for (int i = 0; i < kThreads; i++) PTHREAD_JOIN(threads[i], 0);
}
TEST(SanitizerCommon, MutexTry) {
Mutex mtx;
TestData<Mutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, try_thread<Mutex>, &data);
for (int i = 0; i < kThreads; i++) PTHREAD_JOIN(threads[i], 0);
}
struct SemaphoreData {
Semaphore *sem;
bool done;
};
void *SemaphoreThread(void *arg) {
auto data = static_cast<SemaphoreData *>(arg);
data->sem->Wait();
data->done = true;
return nullptr;
}
TEST(SanitizerCommon, Semaphore) {
Semaphore sem;
sem.Post(1);
sem.Wait();
sem.Post(3);
sem.Wait();
sem.Wait();
sem.Wait();
SemaphoreData data = {&sem, false};
pthread_t thread;
PTHREAD_CREATE(&thread, nullptr, SemaphoreThread, &data);
internal_sleep(1);
CHECK(!data.done);
sem.Post(1);
PTHREAD_JOIN(thread, nullptr);
}
} // namespace __sanitizer
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