libc/private/bionic_systrace.h

/*
 * Copyright (C) 2014 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.
 */

#pragma once

#include <cutils/trace.h>  // For ATRACE_TAG_BIONIC.

#include "platform/bionic/macros.h"

static constexpr char kTraceTagsProp[] = "debug.atrace.tags.enableflags";

// Tracing class for bionic. To begin a trace at a specified point:
//   ScopedTrace("Trace message");
// The trace will end when the contructor goes out of scope.

class __LIBC_HIDDEN__ ScopedTrace {
 public:
  explicit ScopedTrace(const char* message);
  ~ScopedTrace();

  void End();
 private:
  bool called_end_;
  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedTrace);
};

int get_trace_marker_fd();
bool should_trace(const uint64_t enable_tags = ATRACE_TAG_BIONIC);
void output_trace(const char* message, const char event = 'B');

void bionic_trace_begin(const char* message);
void bionic_trace_end();