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
|
/*
* 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_ELF_H
#define _LIBUNWINDSTACK_ELF_H
#include <stddef.h>
#include <memory>
#include <mutex>
#include <string>
#include <unordered_map>
#include <utility>
#include <unwindstack/ElfInterface.h>
#include <unwindstack/Memory.h>
#if !defined(EM_AARCH64)
#define EM_AARCH64 183
#endif
namespace unwindstack {
// Forward declaration.
struct MapInfo;
class Regs;
enum ArchEnum : uint8_t {
ARCH_UNKNOWN = 0,
ARCH_ARM,
ARCH_ARM64,
ARCH_X86,
ARCH_X86_64,
ARCH_MIPS,
ARCH_MIPS64,
};
class Elf {
public:
Elf(Memory* memory) : memory_(memory) {}
virtual ~Elf() = default;
bool Init();
void InitGnuDebugdata();
void Invalidate();
std::string GetSoname();
bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
bool GetGlobalVariable(const std::string& name, uint64_t* memory_address);
uint64_t GetRelPc(uint64_t pc, const MapInfo* map_info);
bool StepIfSignalHandler(uint64_t rel_pc, Regs* regs, Memory* process_memory);
bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory, bool* finished);
ElfInterface* CreateInterfaceFromMemory(Memory* memory);
std::string GetBuildID();
uint64_t GetLoadBias() { return load_bias_; }
bool IsValidPc(uint64_t pc);
void GetLastError(ErrorData* data);
ErrorCode GetLastErrorCode();
uint64_t GetLastErrorAddress();
bool valid() { return valid_; }
uint32_t machine_type() { return machine_type_; }
uint8_t class_type() { return class_type_; }
ArchEnum arch() { return arch_; }
Memory* memory() { return memory_.get(); }
ElfInterface* interface() { return interface_.get(); }
ElfInterface* gnu_debugdata_interface() { return gnu_debugdata_interface_.get(); }
static bool IsValidElf(Memory* memory);
static bool GetInfo(Memory* memory, uint64_t* size);
static uint64_t GetLoadBias(Memory* memory);
static std::string GetBuildID(Memory* memory);
static void SetCachingEnabled(bool enable);
static bool CachingEnabled() { return cache_enabled_; }
static void CacheLock();
static void CacheUnlock();
static void CacheAdd(MapInfo* info);
static bool CacheGet(MapInfo* info);
static bool CacheAfterCreateMemory(MapInfo* info);
protected:
bool valid_ = false;
uint64_t load_bias_ = 0;
std::unique_ptr<ElfInterface> interface_;
std::unique_ptr<Memory> memory_;
uint32_t machine_type_;
uint8_t class_type_;
ArchEnum arch_;
// Protect calls that can modify internal state of the interface object.
std::mutex lock_;
std::unique_ptr<Memory> gnu_debugdata_memory_;
std::unique_ptr<ElfInterface> gnu_debugdata_interface_;
static bool cache_enabled_;
static std::unordered_map<std::string, std::pair<std::shared_ptr<Elf>, bool>>* cache_;
static std::mutex* cache_lock_;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_ELF_H
|
