runtime/base/systrace.h

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ART_RUNTIME_BASE_SYSTRACE_H_
#define ART_RUNTIME_BASE_SYSTRACE_H_

#define ATRACE_TAG ATRACE_TAG_DALVIK
#include <cutils/trace.h>
#include <utils/Trace.h>

#include <string>

#include "android-base/stringprintf.h"

namespace art {

class ScopedTrace {
 public:
  explicit ScopedTrace(const char* name) {
    ATRACE_BEGIN(name);
  }
  template <typename Fn>
  explicit ScopedTrace(Fn fn) {
    if (ATRACE_ENABLED()) {
      ATRACE_BEGIN(fn().c_str());
    }
  }

  explicit ScopedTrace(const std::string& name) : ScopedTrace(name.c_str()) {}

  ~ScopedTrace() {
    ATRACE_END();
  }
};

#define SCOPED_TRACE(fmtstr, ...) \
  ::art::ScopedTrace trace ## __LINE__([&]() { \
    return ::android::base::StringPrintf((fmtstr), __VA_ARGS__); \
  })

}  // namespace art

#endif  // ART_RUNTIME_BASE_SYSTRACE_H_