1/* Copyright (C) 2011 Red Hat, Inc.
2   This file is part of elfutils.
3   Written by Marek Polacek <mpolacek@redhat.com>, 2011.
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 ELFUTILS_HEADER(dwfl)
23#include <assert.h>
24#include <dwarf.h>
25#include <fcntl.h>
26#include <stdio.h>
27#include <unistd.h>
28
29
30int
31main (int argc, char *argv[])
32{
33  int cnt;
34
35  for (cnt = 1; cnt < argc; ++cnt)
36    {
37      Dwarf_Off offset = 0;
38      size_t len;
39
40      int fd = open64 (argv[cnt], O_RDONLY);
41      if (fd == -1)
42	{
43	  printf ("cannot open '%s': %m\n", argv[cnt]);
44	  return 1;
45	}
46
47      Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
48      if (dbg == NULL)
49	{
50	  printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));
51	  close (fd);
52	  return 1;
53	}
54
55      /* Try to use NULL Dwarf object.  */
56      const char *str = dwarf_getstring (NULL, offset, &len);
57      assert (str == NULL);
58
59      /* Use insane offset.  */
60      str = dwarf_getstring (dbg, ~0UL, &len);
61      assert (str == NULL);
62
63      /* Now do some real work.  */
64      for (int i = 0; i < 100; ++i)
65	{
66	  str = dwarf_getstring (dbg, offset, &len);
67	  puts (str);
68
69	  /* Advance.  */
70	  offset += len + 1;
71	}
72
73      close (fd);
74    }
75
76  return 0;
77}
78