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 UNWIND_CONTEXT_H
16 #define UNWIND_CONTEXT_H
17 
18 #include <memory>
19 #if is_ohos
20 #include <ucontext.h>
21 #endif
22 
23 #include "byte_order.h"
24 #include "dfx_errors.h"
25 #include "unwind_define.h"
26 #include "unwind_loc.h"
27 
28 namespace OHOS {
29 namespace HiviewDFX {
30 class DfxMap;
31 class DfxMaps;
32 class DfxRegs;
33 
34 struct UnwindTableInfo {
35     uintptr_t startPc = 0;
36     uintptr_t endPc = 0;
37     uintptr_t gp = 0; /* global-pointer in effect for this entry */
38     int format = -1;
39     bool isLinear = false;
40     uintptr_t namePtr = 0;
41     uintptr_t segbase = 0;
42     uintptr_t tableLen = 0;
43     uintptr_t tableData = 0;
44 };
45 
46 struct UnwindEntryInfo {
47     uintptr_t startPc;
48     uintptr_t endPc;
49     uintptr_t lsda;
50     uintptr_t handler;
51     uintptr_t gp;
52     int format = -1;
53     int unwindInfoSize;
54     void *unwindInfo;
55 };
56 
57 struct UnwindAccessors {
58     int (*FindUnwindTable)(uintptr_t, UnwindTableInfo &, void *);
59     int (*AccessMem)(uintptr_t, uintptr_t *, void *);
60     int (*AccessReg)(int, uintptr_t *, void *);
61     int (*GetMapByPc)(uintptr_t, std::shared_ptr<DfxMap> &, void *);
62 };
63 
64 struct UnwindContext {
65     bool stackCheck = false;
66     uintptr_t stackBottom = 0;
67     uintptr_t stackTop = 0;
68     int pid;
69     std::shared_ptr<DfxRegs> regs = nullptr;
70     std::shared_ptr<DfxMaps> maps = nullptr;
71     std::shared_ptr<DfxMap> map = nullptr;
72     struct UnwindTableInfo di;
73 };
74 } // namespace HiviewDFX
75 } // namespace OHOS
76 #endif
77