1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <log/log.h>
20#include <backtrace/Backtrace.h>
21#include <memory>
22
23class CallStack {
24public:
25    // Create a callstack with the current thread's stack trace.
26    // Immediately dump it to logcat using the given logtag.
27    static void log(const char* logtag) noexcept {
28        std::unique_ptr<Backtrace> backtrace(
29                Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
30        if (backtrace->Unwind(2)) {
31            for (size_t i = 0, c = backtrace->NumFrames(); i < c; i++) {
32                __android_log_print(ANDROID_LOG_DEBUG, logtag, "%s",
33                        backtrace->FormatFrameData(i).c_str());
34            }
35        }
36    }
37};
38
39