1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LIBUNWINDSTACK_DWARF_SECTION_H
#define _LIBUNWINDSTACK_DWARF_SECTION_H
#include <stdint.h>
#include <iterator>
#include <unordered_map>
#include <unwindstack/DwarfLocation.h>
#include <unwindstack/DwarfMemory.h>
#include <unwindstack/DwarfStructs.h>
namespace unwindstack {
// Forward declarations.
enum DwarfError : uint8_t;
class Memory;
class Regs;
class DwarfSection {
public:
DwarfSection(Memory* memory);
virtual ~DwarfSection() = default;
class iterator : public std::iterator<std::bidirectional_iterator_tag, DwarfFde*> {
public:
iterator(DwarfSection* section, size_t index) : section_(section), index_(index) {}
iterator& operator++() {
index_++;
return *this;
}
iterator& operator++(int increment) {
index_ += increment;
return *this;
}
iterator& operator--() {
index_--;
return *this;
}
iterator& operator--(int decrement) {
index_ -= decrement;
return *this;
}
bool operator==(const iterator& rhs) { return this->index_ == rhs.index_; }
bool operator!=(const iterator& rhs) { return this->index_ != rhs.index_; }
const DwarfFde* operator*() { return section_->GetFdeFromIndex(index_); }
private:
DwarfSection* section_ = nullptr;
size_t index_ = 0;
};
iterator begin() { return iterator(this, 0); }
iterator end() { return iterator(this, fde_count_); }
DwarfError last_error() { return last_error_; }
virtual bool Init(uint64_t offset, uint64_t size) = 0;
virtual bool Eval(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*) = 0;
virtual bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) = 0;
virtual bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) = 0;
virtual const DwarfFde* GetFdeFromIndex(size_t index) = 0;
const DwarfFde* GetFdeFromPc(uint64_t pc);
virtual const DwarfFde* GetFdeFromOffset(uint64_t fde_offset) = 0;
virtual bool GetCfaLocationInfo(uint64_t pc, const DwarfFde* fde, dwarf_loc_regs_t* loc_regs) = 0;
virtual bool IsCie32(uint32_t value32) = 0;
virtual bool IsCie64(uint64_t value64) = 0;
virtual uint64_t GetCieOffsetFromFde32(uint32_t pointer) = 0;
virtual uint64_t GetCieOffsetFromFde64(uint64_t pointer) = 0;
virtual uint64_t AdjustPcFromFde(uint64_t pc) = 0;
bool Step(uint64_t pc, Regs* regs, Memory* process_memory);
protected:
DwarfMemory memory_;
DwarfError last_error_;
uint64_t fde_count_;
std::unordered_map<uint64_t, DwarfFde> fde_entries_;
std::unordered_map<uint64_t, DwarfCie> cie_entries_;
std::unordered_map<uint64_t, dwarf_loc_regs_t> cie_loc_regs_;
};
template <typename AddressType>
class DwarfSectionImpl : public DwarfSection {
public:
DwarfSectionImpl(Memory* memory) : DwarfSection(memory) {}
virtual ~DwarfSectionImpl() = default;
bool Eval(const DwarfCie* cie, Memory* regular_memory, const dwarf_loc_regs_t& loc_regs,
Regs* regs) override;
const DwarfCie* GetCie(uint64_t offset);
bool FillInCie(DwarfCie* cie);
const DwarfFde* GetFdeFromOffset(uint64_t offset) override;
bool FillInFde(DwarfFde* fde);
bool GetCfaLocationInfo(uint64_t pc, const DwarfFde* fde, dwarf_loc_regs_t* loc_regs) override;
bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) override;
protected:
bool EvalExpression(const DwarfLocation& loc, uint8_t version, Memory* regular_memory,
AddressType* value);
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_DWARF_SECTION_H
|
