1 /* A variant of get-lines that uses dwarf_next_lines.
2 Copyright (C) 2002, 2004, 2018 Red Hat, Inc.
3 This file is part of elfutils.
4
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 elfutils is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21
22 #include <fcntl.h>
23 #include <inttypes.h>
24 #include <libelf.h>
25 #include ELFUTILS_HEADER(dw)
26 #include <stdio.h>
27 #include <string.h>
28 #include <unistd.h>
29
30
31 int
main(int argc,char * argv[])32 main (int argc, char *argv[])
33 {
34 int result = 0;
35 int cnt;
36
37 for (cnt = 1; cnt < argc; ++cnt)
38 {
39 int fd = open (argv[cnt], O_RDONLY);
40
41 Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
42 if (dbg == NULL)
43 {
44 printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));
45 close (fd);
46 continue;
47 }
48
49 Dwarf_Off off;
50 Dwarf_Off next_off = 0;
51 Dwarf_CU *cu = NULL;
52 Dwarf_Lines *lb;
53 size_t nlb;
54 int res;
55 while ((res = dwarf_next_lines (dbg, off = next_off, &next_off, &cu,
56 NULL, NULL, &lb, &nlb)) == 0)
57 {
58 printf ("off = %" PRIu64 "\n", off);
59 printf (" %zu lines\n", nlb);
60
61 for (size_t i = 0; i < nlb; ++i)
62 {
63 Dwarf_Line *l = dwarf_onesrcline (lb, i);
64 if (l == NULL)
65 {
66 printf ("%s: cannot get individual line\n", argv[cnt]);
67 result = 1;
68 break;
69 }
70
71 Dwarf_Addr addr;
72 if (dwarf_lineaddr (l, &addr) != 0)
73 addr = 0;
74 const char *file = dwarf_linesrc (l, NULL, NULL);
75 int line;
76 if (dwarf_lineno (l, &line) != 0)
77 line = 0;
78
79 printf ("%" PRIx64 ": %s:%d:", (uint64_t) addr,
80 file ?: "???", line);
81
82 /* Getting the file path through the Dwarf_Files should
83 result in the same path. */
84 Dwarf_Files *files;
85 size_t idx;
86 if (dwarf_line_file (l, &files, &idx) != 0)
87 {
88 printf ("%s: cannot get file from line (%zd): %s\n",
89 argv[cnt], i, dwarf_errmsg (-1));
90 result = 1;
91 break;
92 }
93 const char *path = dwarf_filesrc (files, idx, NULL, NULL);
94 if ((path == NULL && file != NULL)
95 || (path != NULL && file == NULL)
96 || (strcmp (file, path) != 0))
97 {
98 printf ("%s: line %zd srcline (%s) != file srcline (%s)\n",
99 argv[cnt], i, file ?: "???", path ?: "???");
100 result = 1;
101 break;
102 }
103
104 int column;
105 if (dwarf_linecol (l, &column) != 0)
106 column = 0;
107 if (column >= 0)
108 printf ("%d:", column);
109
110 bool is_stmt;
111 if (dwarf_linebeginstatement (l, &is_stmt) != 0)
112 is_stmt = false;
113 bool end_sequence;
114 if (dwarf_lineendsequence (l, &end_sequence) != 0)
115 end_sequence = false;
116 bool basic_block;
117 if (dwarf_lineblock (l, &basic_block) != 0)
118 basic_block = false;
119 bool prologue_end;
120 if (dwarf_lineprologueend (l, &prologue_end) != 0)
121 prologue_end = false;
122 bool epilogue_begin;
123 if (dwarf_lineepiloguebegin (l, &epilogue_begin) != 0)
124 epilogue_begin = false;
125
126 printf (" is_stmt:%s, end_seq:%s, bb:%s, prologue:%s, epilogue:%s\n",
127 is_stmt ? "yes" : "no", end_sequence ? "yes" : "no",
128 basic_block ? "yes" : "no", prologue_end ? "yes" : "no",
129 epilogue_begin ? "yes" : "no");
130 }
131 }
132
133 if (res < 0)
134 {
135 printf ("dwarf_next_lines failed: %s\n", dwarf_errmsg (-1));
136 result = 1;
137 }
138
139 dwarf_end (dbg);
140 close (fd);
141 }
142
143 return result;
144 }
145