1 /* 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 /* This files contains process dump hrader. */ 17 18 #ifndef DFX_RING_BUFFER_WRAPPER_H 19 #define DFX_RING_BUFFER_WRAPPER_H 20 21 #include <cinttypes> 22 #include <condition_variable> 23 #include <memory> 24 #include <mutex> 25 #include <string> 26 #include <thread> 27 #include "dfx_define.h" 28 #include "dfx_ring_buffer.h" 29 #include "nocopyable.h" 30 31 typedef int (*RingBufferWriteFunc) (int32_t fd, const char *buf, const int len); 32 33 namespace OHOS { 34 namespace HiviewDFX { 35 class DfxRingBufferWrapper final { 36 public: 37 static DfxRingBufferWrapper &GetInstance(); 38 ~DfxRingBufferWrapper() = default; 39 40 void StartThread(); 41 void StopThread(); 42 43 void SetWriteBufFd(int32_t fd); 44 void SetWriteFunc(RingBufferWriteFunc func); 45 46 void AppendMsg(const std::string& msg); 47 int AppendBuf(const char *format, ...); 48 private: 49 static void LoopPrintRingBuffer(); 50 static int DefaultWrite(int32_t fd, const char *buf, const int len); 51 52 DfxRingBufferWrapper() = default; 53 DISALLOW_COPY_AND_MOVE(DfxRingBufferWrapper); 54 55 RingBufferWriteFunc writeFunc_ = nullptr; 56 57 std::thread thread_; 58 DfxRingBuffer<BACK_TRACE_RING_BUFFER_SIZE, std::string> ringBuffer_; 59 int32_t fd_ = -1; 60 volatile bool hasFinished_ = false; 61 62 static std::condition_variable printCV_; 63 static std::mutex printMutex_; 64 }; 65 } // namespace HiviewDFX 66 } // namespace OHOS 67 68 #endif // DFX_PROCESSDUMP_H 69