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
|
/* A variant of get-lines that uses dwarf_next_lines.
Copyright (C) 2002, 2004, 2018 Red Hat, Inc.
This file is part of elfutils.
This file 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 3 of the License, or
(at your option) any later version.
elfutils 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <fcntl.h>
#include <inttypes.h>
#include <libelf.h>
#include ELFUTILS_HEADER(dw)
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
main (int argc, char *argv[])
{
int result = 0;
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));
close (fd);
continue;
}
Dwarf_Off off;
Dwarf_Off next_off = 0;
Dwarf_CU *cu = NULL;
Dwarf_Lines *lb;
size_t nlb;
int res;
while ((res = dwarf_next_lines (dbg, off = next_off, &next_off, &cu,
NULL, NULL, &lb, &nlb)) == 0)
{
printf ("off = %" PRIu64 "\n", off);
printf (" %zu lines\n", nlb);
for (size_t i = 0; i < nlb; ++i)
{
Dwarf_Line *l = dwarf_onesrcline (lb, i);
if (l == NULL)
{
printf ("%s: cannot get individual line\n", argv[cnt]);
result = 1;
break;
}
Dwarf_Addr addr;
if (dwarf_lineaddr (l, &addr) != 0)
addr = 0;
const char *file = dwarf_linesrc (l, NULL, NULL);
int line;
if (dwarf_lineno (l, &line) != 0)
line = 0;
printf ("%" PRIx64 ": %s:%d:", (uint64_t) addr,
file ?: "???", line);
/* Getting the file path through the Dwarf_Files should
result in the same path. */
Dwarf_Files *files;
size_t idx;
if (dwarf_line_file (l, &files, &idx) != 0)
{
printf ("%s: cannot get file from line (%zd): %s\n",
argv[cnt], i, dwarf_errmsg (-1));
result = 1;
break;
}
const char *path = dwarf_filesrc (files, idx, NULL, NULL);
if ((path == NULL && file != NULL)
|| (path != NULL && file == NULL)
|| (strcmp (file, path) != 0))
{
printf ("%s: line %zd srcline (%s) != file srcline (%s)\n",
argv[cnt], i, file ?: "???", path ?: "???");
result = 1;
break;
}
int column;
if (dwarf_linecol (l, &column) != 0)
column = 0;
if (column >= 0)
printf ("%d:", column);
bool is_stmt;
if (dwarf_linebeginstatement (l, &is_stmt) != 0)
is_stmt = false;
bool end_sequence;
if (dwarf_lineendsequence (l, &end_sequence) != 0)
end_sequence = false;
bool basic_block;
if (dwarf_lineblock (l, &basic_block) != 0)
basic_block = false;
bool prologue_end;
if (dwarf_lineprologueend (l, &prologue_end) != 0)
prologue_end = false;
bool epilogue_begin;
if (dwarf_lineepiloguebegin (l, &epilogue_begin) != 0)
epilogue_begin = false;
printf (" is_stmt:%s, end_seq:%s, bb:%s, prologue:%s, epilogue:%s\n",
is_stmt ? "yes" : "no", end_sequence ? "yes" : "no",
basic_block ? "yes" : "no", prologue_end ? "yes" : "no",
epilogue_begin ? "yes" : "no");
}
}
if (res < 0)
{
printf ("dwarf_next_lines failed: %s\n", dwarf_errmsg (-1));
result = 1;
}
dwarf_end (dbg);
close (fd);
}
return result;
}
|
