1 /* 2 * Copyright (c) 2023 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 #ifndef FP_UNWINDER_H 16 #define FP_UNWINDER_H 17 18 #include <memory> 19 #include <vector> 20 #include <link.h> 21 #include <unistd.h> 22 #include <libunwind.h> 23 #include "dfx_frame.h" 24 #include "dfx_regs.h" 25 26 namespace OHOS { 27 namespace HiviewDFX { 28 class FpUnwinder { 29 public: 30 FpUnwinder(); 31 ~FpUnwinder(); 32 33 bool UnwindWithContext(unw_context_t& context, size_t skipFrameNum); 34 bool Unwind(size_t skipFrameNum); 35 bool Unwind(const std::shared_ptr<DfxRegs> &dfxregs, size_t skipFrameNum); 36 37 void UpdateFrameInfo(); 38 const std::vector<DfxFrame>& GetFrames() const; 39 private: 40 bool Step(uintptr_t& fp, uintptr_t& pc); IsValidFrame(uintptr_t frame,uintptr_t stackTop,uintptr_t stackBottom)41 inline bool IsValidFrame(uintptr_t frame, uintptr_t stackTop, uintptr_t stackBottom) 42 { 43 return ((frame > stackBottom) && (frame < stackTop - sizeof(uintptr_t))); 44 } 45 static int DlIteratePhdrCallback(struct dl_phdr_info *info, size_t size, void *data); 46 47 private: 48 std::vector<DfxFrame> frames_; 49 uintptr_t stackBottom_; 50 uintptr_t stackTop_; 51 }; 52 } // namespace HiviewDFX 53 } // namespace OHOS 54 #endif 55