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 <unistd.h>
28 #include <dwarf.h>
29 #include "system.h"
30
31 #ifndef __linux__
32 int
main(void)33 main (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
43 static Dwfl *
elfutils_open(pid_t pid,Dwarf_Addr address)44 elfutils_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
89 static void
elfutils_close(Dwfl * dwfl)90 elfutils_close (Dwfl *dwfl)
91 {
92 dwfl_end (dwfl);
93 }
94
95 int
main(void)96 main (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