forked from OSchip/llvm-project
127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
//===-- tsan_mutex_test.cc ------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_atomic.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_mutex.h"
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#include "tsan_mutex.h"
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#include "gtest/gtest.h"
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namespace __tsan {
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template<typename MutexType>
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class TestData {
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public:
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explicit TestData(MutexType *mtx)
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: mtx_(mtx) {
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for (int i = 0; i < kSize; i++)
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data_[i] = 0;
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}
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void Write() {
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Lock l(mtx_);
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T v0 = data_[0];
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for (int i = 0; i < kSize; i++) {
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CHECK_EQ(data_[i], v0);
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data_[i]++;
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}
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}
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void Read() {
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ReadLock l(mtx_);
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T v0 = data_[0];
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for (int i = 0; i < kSize; i++) {
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CHECK_EQ(data_[i], v0);
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}
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}
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void Backoff() {
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volatile T data[kSize] = {};
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for (int i = 0; i < kSize; i++) {
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data[i]++;
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CHECK_EQ(data[i], 1);
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}
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}
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private:
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typedef GenericScopedLock<MutexType> Lock;
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static const int kSize = 64;
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typedef u64 T;
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MutexType *mtx_;
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char pad_[kCacheLineSize];
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T data_[kSize];
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};
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const int kThreads = 8;
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const int kWriteRate = 1024;
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#if SANITIZER_DEBUG
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const int kIters = 16*1024;
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#else
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const int kIters = 64*1024;
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#endif
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template<typename MutexType>
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static void *write_mutex_thread(void *param) {
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TestData<MutexType> *data = (TestData<MutexType>*)param;
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for (int i = 0; i < kIters; i++) {
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data->Write();
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data->Backoff();
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}
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return 0;
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}
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template<typename MutexType>
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static void *read_mutex_thread(void *param) {
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TestData<MutexType> *data = (TestData<MutexType>*)param;
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for (int i = 0; i < kIters; i++) {
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if ((i % kWriteRate) == 0)
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data->Write();
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else
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data->Read();
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data->Backoff();
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}
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return 0;
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}
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TEST(Mutex, Write) {
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Mutex mtx(MutexTypeAnnotations, StatMtxAnnotations);
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TestData<Mutex> data(&mtx);
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pthread_t threads[kThreads];
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for (int i = 0; i < kThreads; i++)
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pthread_create(&threads[i], 0, write_mutex_thread<Mutex>, &data);
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for (int i = 0; i < kThreads; i++)
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pthread_join(threads[i], 0);
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}
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TEST(Mutex, ReadWrite) {
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Mutex mtx(MutexTypeAnnotations, StatMtxAnnotations);
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TestData<Mutex> data(&mtx);
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pthread_t threads[kThreads];
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for (int i = 0; i < kThreads; i++)
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pthread_create(&threads[i], 0, read_mutex_thread<Mutex>, &data);
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for (int i = 0; i < kThreads; i++)
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pthread_join(threads[i], 0);
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}
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TEST(Mutex, SpinWrite) {
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SpinMutex mtx;
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TestData<SpinMutex> data(&mtx);
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pthread_t threads[kThreads];
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for (int i = 0; i < kThreads; i++)
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pthread_create(&threads[i], 0, write_mutex_thread<SpinMutex>, &data);
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for (int i = 0; i < kThreads; i++)
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pthread_join(threads[i], 0);
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}
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} // namespace __tsan
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