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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/test/base/tracing.h"
#include <memory>
#include <utility>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/singleton.h"
#include "base/strings/string_util.h"
#include "base/timer/timer.h"
#include "base/trace_event/trace_event.h"
#include "base/values.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/test/test_utils.h"
#include "services/tracing/public/mojom/constants.mojom.h"
namespace {
using content::BrowserThread;
class StringTraceEndpoint
: public content::TracingController::TraceDataEndpoint {
public:
StringTraceEndpoint(std::string* result,
const base::RepeatingClosure& callback)
: result_(result), completion_callback_(callback) {}
StringTraceEndpoint(const StringTraceEndpoint&) = delete;
StringTraceEndpoint& operator=(const StringTraceEndpoint&) = delete;
void ReceiveTraceChunk(std::unique_ptr<std::string> chunk) override {
*result_ += result_->empty() ? "[" : "";
DCHECK(chunk);
*result_ += *chunk;
}
void ReceivedTraceFinalContents() override {
if (!result_->empty())
*result_ += "]";
completion_callback_.Run();
}
private:
~StringTraceEndpoint() override = default;
raw_ptr<std::string> result_;
base::RepeatingClosure completion_callback_;
};
class InProcessTraceController {
public:
static InProcessTraceController* GetInstance() {
return base::Singleton<InProcessTraceController>::get();
}
InProcessTraceController() = default;
InProcessTraceController(const InProcessTraceController&) = delete;
InProcessTraceController& operator=(const InProcessTraceController&) = delete;
virtual ~InProcessTraceController() = default;
bool BeginTracing(
const base::trace_event::TraceConfig& trace_config,
tracing::StartTracingDoneCallback start_tracing_done_callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return content::TracingController::GetInstance()->StartTracing(
trace_config, std::move(start_tracing_done_callback));
}
bool EndTracing(std::string* json_trace_output) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!content::TracingController::GetInstance()->StopTracing(
new StringTraceEndpoint(
json_trace_output,
base::BindRepeating(
&InProcessTraceController::OnTracingComplete,
base::Unretained(this))),
tracing::mojom::kChromeTraceEventLabel)) {
return false;
}
// Wait for OnEndTracingComplete() to quit the message loop.
message_loop_runner_ = new content::MessageLoopRunner;
message_loop_runner_->Run();
return true;
}
private:
friend struct base::DefaultSingletonTraits<InProcessTraceController>;
void OnEnableTracingComplete() {
message_loop_runner_->Quit();
}
void OnTracingComplete() { message_loop_runner_->Quit(); }
scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
base::OneShotTimer timer_;
};
} // namespace
namespace tracing {
bool BeginTracing(const std::string& category_patterns) {
return InProcessTraceController::GetInstance()->BeginTracing(
base::trace_event::TraceConfig(category_patterns, ""),
tracing::StartTracingDoneCallback());
}
bool BeginTracingWithTraceConfig(
const base::trace_event::TraceConfig& trace_config) {
return InProcessTraceController::GetInstance()->BeginTracing(
trace_config, tracing::StartTracingDoneCallback());
}
bool BeginTracingWithTraceConfig(
const base::trace_event::TraceConfig& trace_config,
tracing::StartTracingDoneCallback start_tracing_done_callback) {
return InProcessTraceController::GetInstance()->BeginTracing(
trace_config, std::move(start_tracing_done_callback));
}
bool EndTracing(std::string* json_trace_output) {
return InProcessTraceController::GetInstance()->EndTracing(json_trace_output);
}
} // namespace tracing
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