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// Copyright (c) 2014 The Chromium 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 <stddef.h>
#include "base/json/json_reader.h"
#include "base/memory/ref_counted_memory.h"
#include "base/run_loop.h"
#include "base/trace_event/trace_buffer.h"
#include "base/trace_event/trace_event.h"
#include "content/public/test/render_view_test.h"
#include "content/renderer/devtools/v8_sampling_profiler.h"
using base::DictionaryValue;
using base::ListValue;
using base::Value;
using base::trace_event::TraceConfig;
using base::trace_event::TraceLog;
using base::trace_event::TraceResultBuffer;
namespace content {
class V8SamplingProfilerTest : public RenderViewTest {
public:
void SetUp() override {
RenderViewTest::SetUp();
sampling_profiler_.reset(new V8SamplingProfiler(true));
trace_buffer_.SetOutputCallback(json_output_.GetCallback());
}
void TearDown() override {
sampling_profiler_.reset();
RenderViewTest::TearDown();
}
void KickV8() { ExecuteJavaScriptForTests("1"); }
void SyncFlush(TraceLog* trace_log) {
base::WaitableEvent flush_complete_event(false, false);
trace_log->Flush(
base::Bind(&V8SamplingProfilerTest::OnTraceDataCollected,
base::Unretained(static_cast<V8SamplingProfilerTest*>(this)),
base::Unretained(&flush_complete_event)));
base::RunLoop().RunUntilIdle();
flush_complete_event.Wait();
}
void OnTraceDataCollected(
base::WaitableEvent* flush_complete_event,
const scoped_refptr<base::RefCountedString>& events_str,
bool has_more_events) {
base::AutoLock lock(lock_);
json_output_.json_output.clear();
trace_buffer_.Start();
trace_buffer_.AddFragment(events_str->data());
trace_buffer_.Finish();
std::unique_ptr<Value> root;
root = base::JSONReader::Read(
json_output_.json_output,
base::JSON_PARSE_RFC | base::JSON_DETACHABLE_CHILDREN);
if (!root.get()) {
LOG(ERROR) << json_output_.json_output;
}
ListValue* root_list = NULL;
ASSERT_TRUE(root.get());
ASSERT_TRUE(root->GetAsList(&root_list));
// Move items into our aggregate collection
while (root_list->GetSize()) {
std::unique_ptr<Value> item;
root_list->Remove(0, &item);
trace_parsed_.Append(item.release());
}
if (!has_more_events)
flush_complete_event->Signal();
}
void CollectTrace(int code_added_events, int sample_events) {
TraceLog* trace_log = TraceLog::GetInstance();
sampling_profiler_->EnableSamplingEventForTesting(code_added_events,
sample_events);
trace_log->SetEnabled(
TraceConfig(TRACE_DISABLED_BY_DEFAULT("v8.cpu_profile"), ""),
TraceLog::RECORDING_MODE);
base::RunLoop().RunUntilIdle();
KickV8(); // Make a call to V8 so it can invoke interrupt request
// callbacks.
base::RunLoop().RunUntilIdle();
sampling_profiler_->WaitSamplingEventForTesting();
trace_log->SetDisabled();
SyncFlush(trace_log);
}
int CountEvents(const std::string& name) const {
size_t trace_parsed_count = trace_parsed_.GetSize();
int events_count = 0;
for (size_t i = 0; i < trace_parsed_count; i++) {
const DictionaryValue* dict;
if (!trace_parsed_.GetDictionary(i, &dict))
continue;
std::string value;
if (!dict->GetString("cat", &value) ||
value != TRACE_DISABLED_BY_DEFAULT("v8.cpu_profile"))
continue;
if (!dict->GetString("name", &value) || value != name)
continue;
++events_count;
}
return events_count;
}
std::unique_ptr<V8SamplingProfiler> sampling_profiler_;
base::Lock lock_;
ListValue trace_parsed_;
TraceResultBuffer trace_buffer_;
TraceResultBuffer::SimpleOutput json_output_;
};
TEST_F(V8SamplingProfilerTest, V8SamplingEventFired) {
sampling_profiler_->EnableSamplingEventForTesting(0, 0);
TraceLog::GetInstance()->SetEnabled(
TraceConfig(TRACE_DISABLED_BY_DEFAULT("v8.cpu_profile"), ""),
TraceLog::RECORDING_MODE);
base::RunLoop().RunUntilIdle();
sampling_profiler_->WaitSamplingEventForTesting();
TraceLog::GetInstance()->SetDisabled();
base::RunLoop().RunUntilIdle();
}
TEST_F(V8SamplingProfilerTest, V8SamplingJitCodeEventsCollected) {
CollectTrace(1, 0);
int jit_code_added_events_count = CountEvents("JitCodeAdded");
CHECK_LT(0, jit_code_added_events_count);
base::RunLoop().RunUntilIdle();
}
TEST_F(V8SamplingProfilerTest, V8SamplingSamplesCollected) {
CollectTrace(0, 1);
int sample_events_count = CountEvents("V8Sample");
CHECK_LT(0, sample_events_count);
base::RunLoop().RunUntilIdle();
}
} // namespace content
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