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 
16 #ifndef DFX_DWARF_INSTRUCTIONS_H
17 #define DFX_DWARF_INSTRUCTIONS_H
18 
19 #include <cinttypes>
20 #include <memory>
21 #include <stack>
22 #include "dwarf_define.h"
23 #include "dfx_memory.h"
24 #include "dfx_regs.h"
25 #include "unwind_context.h"
26 
27 namespace OHOS {
28 namespace HiviewDFX {
29 class DwarfCfaInstructions {
30 public:
DwarfCfaInstructions(std::shared_ptr<DfxMemory> memory)31     DwarfCfaInstructions(std::shared_ptr<DfxMemory> memory) : memory_(memory) {};
32     virtual ~DwarfCfaInstructions() = default;
33 
34     bool Parse(uintptr_t pc, FrameDescEntry fde, RegLocState& rsState);
35 
36 private:
37     bool Iterate(uintptr_t pc, FrameDescEntry fde, uintptr_t instStart, uintptr_t instEnd, RegLocState &rsState);
38     bool DecodeDwCfa(uint8_t op, CommonInfoEntry cie, uintptr_t& pcOffset, uintptr_t& instPtr, RegLocState &rsState);
39 
40 private:
41     std::shared_ptr<DfxMemory> memory_;
42     RegLocState backupRsState_;
43     std::stack<RegLocState> saveRsStates_;
44 };
45 } // nameapace HiviewDFX
46 } // nameapace OHOS
47 #endif
48