1 /*
2 * Copyright © 2012 Collabora, Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial
14 * portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26 #include "config.h"
27
28 #include <assert.h>
29 #include <errno.h>
30 #include <dirent.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <time.h>
35 #include <sys/time.h>
36 #include <sys/resource.h>
37
38 #ifdef HAVE_SYS_PRCTL_H
39 #include <sys/prctl.h>
40 #endif
41
42 #include "test-runner.h"
43
44 #if defined(__FreeBSD__)
45 #include <sys/sysctl.h>
46
47 /*
48 * On FreeBSD, get file descriptor information using sysctl() since that does
49 * not depend on a mounted fdescfs (which provides /dev/fd/N for N > 2).
50 */
51 int
count_open_fds(void)52 count_open_fds(void)
53 {
54 int error;
55 int nfds;
56 int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_NFDS, 0 };
57 size_t len;
58
59 len = sizeof(nfds);
60 error = sysctl(mib, 4, &nfds, &len, NULL, 0);
61 assert(error == 0 && "sysctl KERN_PROC_NFDS failed.");
62 return nfds;
63 }
64 #else
65 int
count_open_fds(void)66 count_open_fds(void)
67 {
68 DIR *dir;
69 struct dirent *ent;
70 int count = 0;
71
72 /*
73 * Using /dev/fd instead of /proc/self/fd should allow this code to
74 * work on non-Linux operating systems.
75 */
76 dir = opendir("/dev/fd");
77 assert(dir && "opening /dev/fd failed.");
78
79 errno = 0;
80 while ((ent = readdir(dir))) {
81 const char *s = ent->d_name;
82 if (s[0] == '.' && (s[1] == 0 || (s[1] == '.' && s[2] == 0)))
83 continue;
84 count++;
85 }
86 assert(errno == 0 && "reading /dev/fd failed.");
87
88 closedir(dir);
89
90 return count;
91 }
92 #endif
93
94 void
exec_fd_leak_check(int nr_expected_fds)95 exec_fd_leak_check(int nr_expected_fds)
96 {
97 const char *exe = "exec-fd-leak-checker";
98 char number[16] = { 0 };
99 const char *test_build_dir = getenv("TEST_BUILD_DIR");
100 char exe_path[256] = { 0 };
101
102 if (test_build_dir == NULL || test_build_dir[0] == 0) {
103 test_build_dir = ".";
104 }
105
106 snprintf(exe_path, sizeof exe_path - 1, "%s/%s", test_build_dir, exe);
107
108 snprintf(number, sizeof number - 1, "%d", nr_expected_fds);
109 execl(exe_path, exe, number, (char *)NULL);
110 assert(0 && "execing fd leak checker failed");
111 }
112
113 #define USEC_TO_NSEC(n) (1000 * (n))
114
115 /* our implementation of usleep and sleep functions that are safe to use with
116 * timeouts (timeouts are implemented using alarm(), so it is not safe use
117 * usleep and sleep. See man pages of these functions)
118 */
119 void
test_usleep(useconds_t usec)120 test_usleep(useconds_t usec)
121 {
122 struct timespec ts = {
123 .tv_sec = 0,
124 .tv_nsec = USEC_TO_NSEC(usec)
125 };
126
127 assert(nanosleep(&ts, NULL) == 0);
128 }
129
130 /* we must write the whole function instead of
131 * wrapping test_usleep, because useconds_t may not
132 * be able to contain such a big number of microseconds */
133 void
test_sleep(unsigned int sec)134 test_sleep(unsigned int sec)
135 {
136 struct timespec ts = {
137 .tv_sec = sec,
138 .tv_nsec = 0
139 };
140
141 assert(nanosleep(&ts, NULL) == 0);
142 }
143
144 /** Try to disable coredumps
145 *
146 * Useful for tests that crash on purpose, to avoid creating a core file
147 * or launching an application crash handler service or cluttering coredumpctl.
148 *
149 * NOTE: Calling this may make the process undebuggable.
150 */
151 void
test_disable_coredumps(void)152 test_disable_coredumps(void)
153 {
154 struct rlimit r;
155
156 if (getrlimit(RLIMIT_CORE, &r) == 0) {
157 r.rlim_cur = 0;
158 setrlimit(RLIMIT_CORE, &r);
159 }
160
161 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
162 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
163 #endif
164 }
165