Ulrich Drepper | 6258e74 | 2007-03-13 06:22:40 +0000 | [diff] [blame^] | 1 | /* Test program for libdwfl file decriptors leakage. |
| 2 | Copyright (C) 2007 Red Hat, Inc. |
| 3 | This file is part of Red Hat elfutils. |
| 4 | |
| 5 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by the |
| 7 | Free Software Foundation; version 2 of the License. |
| 8 | |
| 9 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 10 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License along |
| 15 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 17 | |
| 18 | Red Hat elfutils is an included package of the Open Invention Network. |
| 19 | An included package of the Open Invention Network is a package for which |
| 20 | Open Invention Network licensees cross-license their patents. No patent |
| 21 | license is granted, either expressly or impliedly, by designation as an |
| 22 | included package. Should you wish to participate in the Open Invention |
| 23 | Network licensing program, please visit www.openinventionnetwork.com |
| 24 | <http://www.openinventionnetwork.com>. */ |
| 25 | |
| 26 | #include <config.h> |
| 27 | #include <assert.h> |
| 28 | #include <inttypes.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdio_ext.h> |
| 31 | #include <locale.h> |
| 32 | #include <dirent.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <errno.h> |
| 35 | #include <error.h> |
| 36 | #include <unistd.h> |
| 37 | #include <dwarf.h> |
| 38 | #include <sys/resource.h> |
| 39 | #include ELFUTILS_HEADER(dwfl) |
| 40 | |
| 41 | |
| 42 | static Dwfl * |
| 43 | elfutils_open (pid_t pid, Dwarf_Addr address) |
| 44 | { |
| 45 | static char *debuginfo_path; |
| 46 | static const Dwfl_Callbacks proc_callbacks = |
| 47 | { |
| 48 | .find_debuginfo = dwfl_standard_find_debuginfo, |
| 49 | .debuginfo_path = &debuginfo_path, |
| 50 | |
| 51 | .find_elf = dwfl_linux_proc_find_elf, |
| 52 | }; |
| 53 | Dwfl *dwfl = dwfl_begin (&proc_callbacks); |
| 54 | if (dwfl == NULL) |
| 55 | error (2, 0, "dwfl_begin: %s", dwfl_errmsg (-1)); |
| 56 | |
| 57 | int result = dwfl_linux_proc_report (dwfl, pid); |
| 58 | if (result < 0) |
| 59 | error (2, 0, "dwfl_linux_proc_report: %s", dwfl_errmsg (-1)); |
| 60 | else if (result > 0) |
| 61 | error (2, result, "dwfl_linux_proc_report"); |
| 62 | |
| 63 | if (dwfl_report_end (dwfl, NULL, NULL) != 0) |
| 64 | error (2, 0, "dwfl_report_end: %s", dwfl_errmsg (-1)); |
| 65 | |
| 66 | Dwarf_Addr bias; |
| 67 | Dwarf *dbg = dwfl_addrdwarf (dwfl, address, &bias); |
| 68 | if (dbg != NULL) |
| 69 | { |
| 70 | Elf *elf = dwarf_getelf (dbg); |
| 71 | if (elf == NULL) |
| 72 | error (2, 0, "dwarf_getelf: %s", dwarf_errmsg (-1)); |
| 73 | } |
| 74 | else |
| 75 | { |
| 76 | Elf *elf = dwfl_module_getelf (dwfl_addrmodule (dwfl, address), &bias); |
| 77 | if (elf == NULL) |
| 78 | error (2, 0, "dwfl_module_getelf: %s", dwfl_errmsg (-1)); |
| 79 | } |
| 80 | |
| 81 | return dwfl; |
| 82 | } |
| 83 | |
| 84 | static void |
| 85 | elfutils_close (Dwfl *dwfl) |
| 86 | { |
| 87 | dwfl_end (dwfl); |
| 88 | } |
| 89 | |
| 90 | int |
| 91 | main (void) |
| 92 | { |
| 93 | /* We use no threads here which can interfere with handling a stream. */ |
| 94 | (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER); |
| 95 | |
| 96 | /* Set locale. */ |
| 97 | (void) setlocale (LC_ALL, ""); |
| 98 | |
| 99 | struct rlimit fd_limit = { .rlim_cur = 32, .rlim_max = 32 }; |
| 100 | if (setrlimit (RLIMIT_NOFILE, &fd_limit) < 0) |
| 101 | error (2, errno, "setrlimit"); |
| 102 | |
| 103 | for (int i = 0; i < 5000; ++i) |
| 104 | { |
| 105 | Dwfl *dwfl = elfutils_open (getpid (), (Dwarf_Addr) main); |
| 106 | elfutils_close (dwfl); |
| 107 | } |
| 108 | |
| 109 | return 0; |
| 110 | } |