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
142
143
144
145
146
|
//===-- sanitizer_symbolizer_libbacktrace.cc ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
// Libbacktrace implementation of symbolizer parts.
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"
#include "sanitizer_internal_defs.h"
#include "sanitizer_symbolizer.h"
#include "sanitizer_symbolizer_libbacktrace.h"
#if SANITIZER_LIBBACKTRACE
# include "backtrace-supported.h"
# if SANITIZER_POSIX && BACKTRACE_SUPPORTED && !BACKTRACE_USES_MALLOC
# include "backtrace.h"
# else
# define SANITIZER_LIBBACKTRACE 0
# endif
#endif
namespace __sanitizer {
#if SANITIZER_LIBBACKTRACE
namespace {
struct SymbolizeCodeData {
AddressInfo *frames;
uptr n_frames;
uptr max_frames;
const char *module_name;
uptr module_offset;
};
extern "C" {
static int SymbolizeCodePCInfoCallback(void *vdata, uintptr_t addr,
const char *filename, int lineno,
const char *function) {
SymbolizeCodeData *cdata = (SymbolizeCodeData *)vdata;
if (function) {
AddressInfo *info = &cdata->frames[cdata->n_frames++];
info->Clear();
info->FillAddressAndModuleInfo(addr, cdata->module_name,
cdata->module_offset);
info->function = internal_strdup(function);
if (filename)
info->file = internal_strdup(filename);
info->line = lineno;
if (cdata->n_frames == cdata->max_frames)
return 1;
}
return 0;
}
static void SymbolizeCodeCallback(void *vdata, uintptr_t addr,
const char *symname, uintptr_t, uintptr_t) {
SymbolizeCodeData *cdata = (SymbolizeCodeData *)vdata;
if (symname) {
AddressInfo *info = &cdata->frames[0];
info->Clear();
info->FillAddressAndModuleInfo(addr, cdata->module_name,
cdata->module_offset);
info->function = internal_strdup(symname);
cdata->n_frames = 1;
}
}
static void SymbolizeDataCallback(void *vdata, uintptr_t, const char *symname,
uintptr_t symval, uintptr_t symsize) {
DataInfo *info = (DataInfo *)vdata;
if (symname && symval) {
info->name = internal_strdup(symname);
info->start = symval;
info->size = symsize;
}
}
static void ErrorCallback(void *, const char *, int) {}
} // extern "C"
} // namespace
LibbacktraceSymbolizer *LibbacktraceSymbolizer::get(LowLevelAllocator *alloc) {
// State created in backtrace_create_state is leaked.
void *state = (void *)(backtrace_create_state("/proc/self/exe", 0,
ErrorCallback, NULL));
if (!state)
return 0;
return new(*alloc) LibbacktraceSymbolizer(state);
}
uptr LibbacktraceSymbolizer::SymbolizeCode(uptr addr, AddressInfo *frames,
uptr max_frames,
const char *module_name,
uptr module_offset) {
SymbolizeCodeData data;
data.frames = frames;
data.n_frames = 0;
data.max_frames = max_frames;
data.module_name = module_name;
data.module_offset = module_offset;
backtrace_pcinfo((backtrace_state *)state_, addr, SymbolizeCodePCInfoCallback,
ErrorCallback, &data);
if (data.n_frames)
return data.n_frames;
backtrace_syminfo((backtrace_state *)state_, addr, SymbolizeCodeCallback,
ErrorCallback, &data);
return data.n_frames;
}
bool LibbacktraceSymbolizer::SymbolizeData(DataInfo *info) {
backtrace_syminfo((backtrace_state *)state_, info->address,
SymbolizeDataCallback, ErrorCallback, info);
return true;
}
#else // SANITIZER_LIBBACKTRACE
LibbacktraceSymbolizer *LibbacktraceSymbolizer::get(LowLevelAllocator *alloc) {
return 0;
}
uptr LibbacktraceSymbolizer::SymbolizeCode(uptr addr, AddressInfo *frames,
uptr max_frames,
const char *module_name,
uptr module_offset) {
(void)state_;
return 0;
}
bool LibbacktraceSymbolizer::SymbolizeData(DataInfo *info) {
return false;
}
#endif // SANITIZER_LIBBACKTRACE
} // namespace __sanitizer
|
