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// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "test/cctest/cctest.h"
#include "src/thread-id.h"
namespace v8 {
namespace internal {
// {ThreadId} must be trivially copyable to be stored in {std::atomic}.
ASSERT_TRIVIALLY_COPYABLE(i::ThreadId);
using AtomicThreadId = std::atomic<i::ThreadId>;
class ThreadIdValidationThread : public base::Thread {
public:
ThreadIdValidationThread(base::Thread* thread_to_start, AtomicThreadId* refs,
unsigned int thread_no, base::Semaphore* semaphore)
: Thread(Options("ThreadRefValidationThread")),
refs_(refs),
thread_no_(thread_no),
thread_to_start_(thread_to_start),
semaphore_(semaphore) {}
void Run() override {
i::ThreadId thread_id = i::ThreadId::Current();
CHECK(thread_id.IsValid());
for (int i = 0; i < thread_no_; i++) {
CHECK_NE(refs_[i].load(std::memory_order_relaxed), thread_id);
}
refs_[thread_no_].store(thread_id, std::memory_order_relaxed);
if (thread_to_start_ != nullptr) {
thread_to_start_->Start();
}
semaphore_->Signal();
}
private:
AtomicThreadId* const refs_;
const int thread_no_;
base::Thread* const thread_to_start_;
base::Semaphore* const semaphore_;
};
TEST(ThreadIdValidation) {
constexpr int kNThreads = 100;
std::unique_ptr<ThreadIdValidationThread> threads[kNThreads];
AtomicThreadId refs[kNThreads];
base::Semaphore semaphore(0);
for (int i = kNThreads - 1; i >= 0; i--) {
ThreadIdValidationThread* prev =
i == kNThreads - 1 ? nullptr : threads[i + 1].get();
threads[i] =
base::make_unique<ThreadIdValidationThread>(prev, refs, i, &semaphore);
}
threads[0]->Start();
for (int i = 0; i < kNThreads; i++) {
semaphore.Wait();
}
}
} // namespace internal
} // namespace v8
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