1/* Test program for libdwfl file decriptors leakage.
2   Copyright (C) 2007, 2008 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#include <config.h>
19#include <assert.h>
20#include <inttypes.h>
21#include <stdio.h>
22#include <stdio_ext.h>
23#include <locale.h>
24#include <dirent.h>
25#include <stdlib.h>
26#include <errno.h>
27#include <error.h>
28#include <unistd.h>
29#include <dwarf.h>
30
31#ifndef __linux__
32int
33main (void)
34{
35  return 77; /* dwfl_linux_proc_report is linux specific.  */
36}
37#else
38
39#include <sys/resource.h>
40#include ELFUTILS_HEADER(dwfl)
41
42
43static Dwfl *
44elfutils_open (pid_t pid, Dwarf_Addr address)
45{
46  static char *debuginfo_path;
47  static const Dwfl_Callbacks proc_callbacks =
48    {
49      .find_debuginfo = dwfl_standard_find_debuginfo,
50      .debuginfo_path = &debuginfo_path,
51
52      .find_elf = dwfl_linux_proc_find_elf,
53    };
54  Dwfl *dwfl = dwfl_begin (&proc_callbacks);
55  if (dwfl == NULL)
56    error (2, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
57
58  int result = dwfl_linux_proc_report (dwfl, pid);
59  if (result < 0)
60    error (2, 0, "dwfl_linux_proc_report: %s", dwfl_errmsg (-1));
61  else if (result > 0)
62    error (2, result, "dwfl_linux_proc_report");
63
64  if (dwfl_report_end (dwfl, NULL, NULL) != 0)
65    error (2, 0, "dwfl_report_end: %s", dwfl_errmsg (-1));
66
67  Dwarf_Addr bias;
68  Dwarf *dbg = dwfl_addrdwarf (dwfl, address, &bias);
69  if (dbg != NULL)
70    {
71      Elf *elf = dwarf_getelf (dbg);
72      if (elf == NULL)
73	error (2, 0, "dwarf_getelf: %s", dwarf_errmsg (-1));
74    }
75  else
76    {
77      Dwfl_Module *module = dwfl_addrmodule (dwfl, address);
78      if (module == NULL)
79	error (2, 0, "dwfl_addrmodule: no module available for 0x%" PRIx64 "",
80	       address);
81      Elf *elf = dwfl_module_getelf (module, &bias);
82      if (elf == NULL)
83	error (2, 0, "dwfl_module_getelf: %s", dwfl_errmsg (-1));
84    }
85
86  return dwfl;
87}
88
89static void
90elfutils_close (Dwfl *dwfl)
91{
92  dwfl_end (dwfl);
93}
94
95int
96main (void)
97{
98  /* We use no threads here which can interfere with handling a stream.  */
99  (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER);
100
101  /* Set locale.  */
102  (void) setlocale (LC_ALL, "");
103
104  struct rlimit fd_limit = { .rlim_cur = 32, .rlim_max = 32 };
105  if (setrlimit (RLIMIT_NOFILE, &fd_limit) < 0)
106    error (2, errno, "setrlimit");
107
108  for (int i = 0; i < 5000; ++i)
109    {
110      Dwfl *dwfl = elfutils_open (getpid (), (Dwarf_Addr) (uintptr_t) &main);
111      elfutils_close (dwfl);
112    }
113
114  return 0;
115}
116#endif
117