| /* Copyright (C) 2011 Red Hat, Inc. |
| This file is part of Red Hat elfutils. |
| Written by Marek Polacek <mpolacek@redhat.com>, 2011. |
| |
| Red Hat elfutils 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; version 2 of the License. |
| |
| Red Hat 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 Red Hat elfutils; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| |
| Red Hat elfutils is an included package of the Open Invention Network. |
| An included package of the Open Invention Network is a package for which |
| Open Invention Network licensees cross-license their patents. No patent |
| license is granted, either expressly or impliedly, by designation as an |
| included package. Should you wish to participate in the Open Invention |
| Network licensing program, please visit www.openinventionnetwork.com |
| <http://www.openinventionnetwork.com>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include ELFUTILS_HEADER(dwfl) |
| #include <assert.h> |
| #include <dwarf.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| int cnt; |
| |
| for (cnt = 1; cnt < argc; ++cnt) |
| { |
| Dwarf_Off offset = 0; |
| size_t len; |
| |
| int fd = open64 (argv[cnt], O_RDONLY); |
| if (fd == -1) |
| { |
| printf ("cannot open '%s': %m\n", argv[cnt]); |
| return 1; |
| } |
| |
| Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ); |
| if (dbg == NULL) |
| { |
| printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1)); |
| close (fd); |
| return 1; |
| } |
| |
| /* Try to use NULL Dwarf object. */ |
| const char *str = dwarf_getstring (NULL, offset, &len); |
| assert (str == NULL); |
| |
| /* Use insane offset. */ |
| str = dwarf_getstring (dbg, ~0UL, &len); |
| assert (str == NULL); |
| |
| /* Now do some real work. */ |
| for (int i = 0; i < 100; ++i) |
| { |
| str = dwarf_getstring (dbg, offset, &len); |
| puts (str); |
| |
| /* Advance. */ |
| offset += len + 1; |
| } |
| |
| close (fd); |
| } |
| |
| return 0; |
| } |