// 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/execution/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) { CHECK(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] = std::make_unique<ThreadIdValidationThread>(prev, refs, i, &semaphore); } CHECK(threads[0]->Start()); for (int i = 0; i < kNThreads; i++) { semaphore.Wait(); } } } // namespace internal } // namespace v8