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 <unwindstack/AndroidUnwinder.h> 21 22 #include <memory> 23 24 class CallStack { 25 public: 26 // Create a callstack with the current thread's stack trace. 27 // Immediately dump it to logcat using the given logtag. log(const char * logtag)28 static void log(const char* logtag) noexcept { 29 unwindstack::AndroidLocalUnwinder unwinder; 30 unwindstack::AndroidUnwinderData data; 31 if (unwinder.Unwind(data)) { 32 for (size_t i = 2, c = data.frames.size(); i < c; i++) { 33 auto& frame = data.frames[i]; 34 // Trim the first two frames. 35 frame.num -= 2; 36 __android_log_print(ANDROID_LOG_DEBUG, logtag, "%s", 37 unwinder.FormatFrame(frame).c_str()); 38 } 39 } 40 } 41 }; 42