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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Copyright (C) 2006-2008 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#ifdef HAVE_DLADDR
# include <dlfcn.h>
#endif /* HAVE_DLADDR */
#ifdef HAVE_BACKTRACE
# include <execinfo.h>
#endif /* HAVE_BACKTRACE */
#include <string.h>
#include "backtrace.h"
typedef struct private_backtrace_t private_backtrace_t;
/**
* Private data of an backtrace_t object.
*/
struct private_backtrace_t {
/**
* Public backtrace_t interface.
*/
backtrace_t public;
/**
* Number of stacks frames obtained in stack_frames
*/
int frame_count;
/**
* Recorded stack frames.
*/
void *frames[];
};
/**
* Implementation of backtrace_t.log
*/
static void log_(private_backtrace_t *this, FILE *file)
{
#ifdef HAVE_BACKTRACE
size_t i;
char **strings;
strings = backtrace_symbols(this->frames, this->frame_count);
fprintf(file, " dumping %d stack frame addresses:\n", this->frame_count);
for (i = 0; i < this->frame_count; i++)
{
#ifdef HAVE_DLADDR
Dl_info info;
if (dladdr(this->frames[i], &info))
{
char cmd[1024];
FILE *output;
int c;
void *ptr = this->frames[i];
if (strstr(info.dli_fname, ".so"))
{
ptr = (void*)(this->frames[i] - info.dli_fbase);
}
snprintf(cmd, sizeof(cmd), "addr2line -e %s %p", info.dli_fname, ptr);
if (info.dli_sname)
{
fprintf(file, " \e[33m%s\e[0m @ %p (\e[31m%s\e[0m+0x%x) [%p]\n",
info.dli_fname, info.dli_fbase, info.dli_sname,
this->frames[i] - info.dli_saddr, this->frames[i]);
}
else
{
fprintf(file, " \e[33m%s\e[0m @ %p [%p]\n", info.dli_fname,
info.dli_fbase, this->frames[i]);
}
fprintf(file, " -> \e[32m");
output = popen(cmd, "r");
if (output)
{
while (TRUE)
{
c = getc(output);
if (c == '\n' || c == EOF)
{
break;
}
fputc(c, file);
}
pclose(output);
}
else
{
#endif /* HAVE_DLADDR */
fprintf(file, " %s\n", strings[i]);
#ifdef HAVE_DLADDR
}
fprintf(file, "\n\e[0m");
}
else
{
fprintf(file, " %s\n", strings[i]);
}
#endif /* HAVE_DLADDR */
}
free (strings);
#else /* !HAVE_BACKTRACE */
fprintf(file, "C library does not support backtrace().\n");
#endif /* HAVE_BACKTRACE */
}
/**
* Implementation of backtrace_t.contains_function
*/
static bool contains_function(private_backtrace_t *this, char *function)
{
#ifdef HAVE_DLADDR
int i;
for (i = 0; i< this->frame_count; i++)
{
Dl_info info;
if (dladdr(this->frames[i], &info) && info.dli_sname)
{
if (streq(info.dli_sname, function))
{
return TRUE;
}
}
}
#endif /* HAVE_DLADDR */
return FALSE;
}
/**
* Implementation of backtrace_t.destroy.
*/
static void destroy(private_backtrace_t *this)
{
free(this);
}
/**
* See header
*/
backtrace_t *backtrace_create(int skip)
{
private_backtrace_t *this;
void *frames[50];
int frame_count = 0;
#ifdef HAVE_BACKTRACE
frame_count = backtrace(frames, countof(frames));
#endif /* HAVE_BACKTRACE */
frame_count = max(frame_count - skip, 0);
this = malloc(sizeof(private_backtrace_t) + frame_count * sizeof(void*));
memcpy(this->frames, frames + skip, frame_count * sizeof(void*));
this->frame_count = frame_count;
this->public.log = (void(*)(backtrace_t*,FILE*))log_;
this->public.contains_function = (bool(*)(backtrace_t*, char *function))contains_function;
this->public.destroy = (void(*)(backtrace_t*))destroy;
return &this->public;
}
|
