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https://github.com/encounter/engine.git
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Adam Barth
6d1228a2f3
This CL teaches shelldb how to trace SkyShell. R=eseidel@chromium.org Review URL: https://codereview.chromium.org/1027903002
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sky/shell/tracing_controller.h"
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#include "base/android/jni_android.h"
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#include "base/android/jni_string.h"
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#include "base/files/file_util.h"
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#include "base/macros.h"
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#include "base/trace_event/trace_event.h"
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#include "jni/TracingController_jni.h"
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namespace sky {
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namespace shell {
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namespace {
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const char kStart[] = "{\"traceEvents\":[";
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const char kEnd[] = "]}";
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static FILE* g_file = NULL;
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void Write(const std::string& data) {
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ignore_result(fwrite(data.data(), data.length(), 1, g_file));
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}
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void HandleChunk(const scoped_refptr<base::RefCountedString>& chunk,
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bool has_more_events) {
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Write(chunk->data());
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if (has_more_events)
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Write(",");
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if (!has_more_events) {
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Write(kEnd);
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base::CloseFile(g_file);
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g_file = NULL;
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LOG(INFO) << "Trace complete";
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}
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}
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} // namespace
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static void StartTracing(JNIEnv* env, jclass clazz) {
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LOG(INFO) << "Starting trace";
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base::trace_event::TraceLog::GetInstance()->SetEnabled(
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base::trace_event::CategoryFilter("*"),
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base::trace_event::TraceLog::RECORDING_MODE,
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base::trace_event::TraceOptions(base::trace_event::RECORD_UNTIL_FULL));
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}
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static void StopTracing(JNIEnv* env, jclass clazz, jstring path) {
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base::trace_event::TraceLog::GetInstance()->SetDisabled();
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base::FilePath file_path(base::android::ConvertJavaStringToUTF8(env, path));
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g_file = base::OpenFile(file_path, "w");
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CHECK(g_file) << "Failed to open file " << file_path.LossyDisplayName();
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LOG(INFO) << "Saving trace to " << file_path.LossyDisplayName();
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Write(kStart);
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base::trace_event::TraceLog::GetInstance()->Flush(base::Bind(&HandleChunk));
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}
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bool RegisterTracingController(JNIEnv* env) {
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return RegisterNativesImpl(env);
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}
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} // namespace shell
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} // namespace sky
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