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// Copyright 2010 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
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// 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.
//
// Tests of the circular queue.
#include "src/init/v8.h"
#include "src/profiler/circular-queue-inl.h"
#include "test/cctest/cctest.h"
using i::SamplingCircularQueue;
TEST(SamplingCircularQueue) {
typedef v8::base::AtomicWord Record;
const int kMaxRecordsInQueue = 4;
SamplingCircularQueue<Record, kMaxRecordsInQueue> scq;
// Check that we are using non-reserved values.
// Fill up the first chunk.
CHECK(!scq.Peek());
for (Record i = 1; i < 1 + kMaxRecordsInQueue; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.StartEnqueue());
CHECK(rec);
*rec = i;
scq.FinishEnqueue();
}
// The queue is full, enqueue is not allowed.
CHECK(!scq.StartEnqueue());
// Try to enqueue when the the queue is full. Consumption must be available.
CHECK(scq.Peek());
for (int i = 0; i < 10; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.StartEnqueue());
CHECK(!rec);
CHECK(scq.Peek());
}
// Consume all records.
for (Record i = 1; i < 1 + kMaxRecordsInQueue; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.Peek());
CHECK(rec);
CHECK_EQ(static_cast<int64_t>(i), static_cast<int64_t>(*rec));
CHECK_EQ(rec, reinterpret_cast<Record*>(scq.Peek()));
scq.Remove();
CHECK_NE(rec, reinterpret_cast<Record*>(scq.Peek()));
}
// The queue is empty.
CHECK(!scq.Peek());
CHECK(!scq.Peek());
for (Record i = 0; i < kMaxRecordsInQueue / 2; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.StartEnqueue());
CHECK(rec);
*rec = i;
scq.FinishEnqueue();
}
// Consume all available kMaxRecordsInQueue / 2 records.
CHECK(scq.Peek());
for (Record i = 0; i < kMaxRecordsInQueue / 2; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.Peek());
CHECK(rec);
CHECK_EQ(static_cast<int64_t>(i), static_cast<int64_t>(*rec));
CHECK_EQ(rec, reinterpret_cast<Record*>(scq.Peek()));
scq.Remove();
CHECK_NE(rec, reinterpret_cast<Record*>(scq.Peek()));
}
// The queue is empty.
CHECK(!scq.Peek());
}
namespace {
typedef v8::base::AtomicWord Record;
typedef SamplingCircularQueue<Record, 12> TestSampleQueue;
class ProducerThread: public v8::base::Thread {
public:
ProducerThread(TestSampleQueue* scq, int records_per_chunk, Record value,
v8::base::Semaphore* finished)
: Thread(Options("producer")),
scq_(scq),
records_per_chunk_(records_per_chunk),
value_(value),
finished_(finished) {}
void Run() override {
for (Record i = value_; i < value_ + records_per_chunk_; ++i) {
Record* rec = reinterpret_cast<Record*>(scq_->StartEnqueue());
CHECK(rec);
*rec = i;
scq_->FinishEnqueue();
}
finished_->Signal();
}
private:
TestSampleQueue* scq_;
const int records_per_chunk_;
Record value_;
v8::base::Semaphore* finished_;
};
} // namespace
TEST(SamplingCircularQueueMultithreading) {
// Emulate multiple VM threads working 'one thread at a time.'
// This test enqueues data from different threads. This corresponds
// to the case of profiling under Linux, where signal handler that
// does sampling is called in the context of different VM threads.
const int kRecordsPerChunk = 4;
TestSampleQueue scq;
v8::base::Semaphore semaphore(0);
ProducerThread producer1(&scq, kRecordsPerChunk, 1, &semaphore);
ProducerThread producer2(&scq, kRecordsPerChunk, 10, &semaphore);
ProducerThread producer3(&scq, kRecordsPerChunk, 20, &semaphore);
CHECK(!scq.Peek());
producer1.Start();
semaphore.Wait();
for (Record i = 1; i < 1 + kRecordsPerChunk; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.Peek());
CHECK(rec);
CHECK_EQ(static_cast<int64_t>(i), static_cast<int64_t>(*rec));
CHECK_EQ(rec, reinterpret_cast<Record*>(scq.Peek()));
scq.Remove();
CHECK_NE(rec, reinterpret_cast<Record*>(scq.Peek()));
}
CHECK(!scq.Peek());
producer2.Start();
semaphore.Wait();
for (Record i = 10; i < 10 + kRecordsPerChunk; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.Peek());
CHECK(rec);
CHECK_EQ(static_cast<int64_t>(i), static_cast<int64_t>(*rec));
CHECK_EQ(rec, reinterpret_cast<Record*>(scq.Peek()));
scq.Remove();
CHECK_NE(rec, reinterpret_cast<Record*>(scq.Peek()));
}
CHECK(!scq.Peek());
producer3.Start();
semaphore.Wait();
for (Record i = 20; i < 20 + kRecordsPerChunk; ++i) {
Record* rec = reinterpret_cast<Record*>(scq.Peek());
CHECK(rec);
CHECK_EQ(static_cast<int64_t>(i), static_cast<int64_t>(*rec));
CHECK_EQ(rec, reinterpret_cast<Record*>(scq.Peek()));
scq.Remove();
CHECK_NE(rec, reinterpret_cast<Record*>(scq.Peek()));
}
CHECK(!scq.Peek());
}