chromium/v8/test/unittests/objects/concurrent-feedback-vector-unittest.cc

// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <atomic>
#include <unordered_set>

#include "src/api/api.h"
#include "src/base/platform/semaphore.h"
#include "src/handles/handles-inl.h"
#include "src/handles/local-handles-inl.h"
#include "src/handles/persistent-handles.h"
#include "src/heap/heap.h"
#include "src/heap/local-heap.h"
#include "src/heap/parked-scope.h"
#include "test/unittests/test-utils.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace v8 {

using ConcurrentFeedbackVectorTest = TestWithContext;

namespace internal {

namespace {

// kCycles is large enough to ensure we see every state we are interested in.
const int kCycles = …;
static std::atomic<bool> all_states_seen{ … };

class FeedbackVectorExplorationThread final : public v8::base::Thread { … };

static void CheckedWait(base::Semaphore& semaphore) { … }

// Verify that a LoadIC can be cycled through different states and safely
// read on a background thread.
TEST_F(ConcurrentFeedbackVectorTest, CheckLoadICStates) { … }

}  // anonymous namespace

}  // namespace internal
}  // namespace v8