1 /*
2  * Copyright (c) 2022-2024 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 DFX_FAULT_STACK_H
16 #define DFX_FAULT_STACK_H
17 
18 #include <memory>
19 #include <vector>
20 
21 #include "dfx_frame.h"
22 #include "dfx_regs.h"
23 #include "dfx_maps.h"
24 
25 namespace OHOS {
26 namespace HiviewDFX {
27 struct MemoryBlockInfo {
28     uintptr_t startAddr;
29     uintptr_t nameAddr;
30     uintptr_t size;
31     std::vector<uintptr_t> content;
32     std::string name;
33 };
34 
35 // Only print first three frame stack
36 class FaultStack {
37 public:
FaultStack(int32_t tid)38     explicit FaultStack(int32_t tid) : tid_(tid) {};
39     ~FaultStack() = default;
40 
41     void Print() const;
42     void PrintRegisterMemory() const;
43     bool CollectStackInfo(const std::vector<DfxFrame>& frames, bool needParseStack = false);
44     bool CreateBlockForCorruptedStack(const std::vector<DfxFrame>& frames, uintptr_t prevEndAddr, uintptr_t size);
45     void CollectRegistersBlock(std::shared_ptr<DfxRegs> regs, std::shared_ptr<DfxMaps> maps);
46     bool ParseUnwindStack(std::shared_ptr<DfxMaps> maps, std::vector<DfxFrame>& frames);
47 
48 private:
49     bool ReadTargetMemory(uintptr_t addr, uintptr_t &value) const;
50     uintptr_t AdjustAndCreateMemoryBlock(size_t index, uintptr_t prevSp, uintptr_t prevEndAddr, uintptr_t size);
51     uintptr_t PrintMemoryBlock(const MemoryBlockInfo& info, uintptr_t stackStartAddr) const;
52     MemoryBlockInfo CreateMemoryBlock(uintptr_t addr, uintptr_t offset, uintptr_t size, const std::string& name) const;
53 
54 private:
55     int32_t tid_;
56     std::vector<MemoryBlockInfo> blocks_;
57     std::vector<MemoryBlockInfo> registerBlocks_;
58     mutable int prevErrno_ = 0;
59 };
60 } // namespace HiviewDFX
61 } // namespace OHOS
62 #endif
63