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 int
count_open_fds(void)45 count_open_fds(void)
46 {
47 DIR *dir;
48 struct dirent *ent;
49 int count = 0;
50
51 dir = opendir("/proc/self/fd");
52 assert(dir && "opening /proc/self/fd failed.");
53
54 errno = 0;
55 while ((ent = readdir(dir))) {
56 const char *s = ent->d_name;
57 if (s[0] == '.' && (s[1] == 0 || (s[1] == '.' && s[2] == 0)))
58 continue;
59 count++;
60 }
61 assert(errno == 0 && "reading /proc/self/fd failed.");
62
63 closedir(dir);
64
65 return count;
66 }
67
68 void
exec_fd_leak_check(int nr_expected_fds)69 exec_fd_leak_check(int nr_expected_fds)
70 {
71 const char *exe = "exec-fd-leak-checker";
72 char number[16] = { 0 };
73 const char *test_build_dir = getenv("TEST_BUILD_DIR");
74 char exe_path[256] = { 0 };
75
76 if (test_build_dir == NULL || test_build_dir[0] == 0) {
77 test_build_dir = ".";
78 }
79
80 snprintf(exe_path, sizeof exe_path - 1, "%s/%s", test_build_dir, exe);
81
82 snprintf(number, sizeof number - 1, "%d", nr_expected_fds);
83 execl(exe_path, exe, number, (char *)NULL);
84 assert(0 && "execing fd leak checker failed");
85 }
86
87 #define USEC_TO_NSEC(n) (1000 * (n))
88
89 /* our implementation of usleep and sleep functions that are safe to use with
90 * timeouts (timeouts are implemented using alarm(), so it is not safe use
91 * usleep and sleep. See man pages of these functions)
92 */
93 void
test_usleep(useconds_t usec)94 test_usleep(useconds_t usec)
95 {
96 struct timespec ts = {
97 .tv_sec = 0,
98 .tv_nsec = USEC_TO_NSEC(usec)
99 };
100
101 assert(nanosleep(&ts, NULL) == 0);
102 }
103
104 /* we must write the whole function instead of
105 * wrapping test_usleep, because useconds_t may not
106 * be able to contain such a big number of microseconds */
107 void
test_sleep(unsigned int sec)108 test_sleep(unsigned int sec)
109 {
110 struct timespec ts = {
111 .tv_sec = sec,
112 .tv_nsec = 0
113 };
114
115 assert(nanosleep(&ts, NULL) == 0);
116 }
117
118 /** Try to disable coredumps
119 *
120 * Useful for tests that crash on purpose, to avoid creating a core file
121 * or launching an application crash handler service or cluttering coredumpctl.
122 *
123 * NOTE: Calling this may make the process undebuggable.
124 */
125 void
test_disable_coredumps(void)126 test_disable_coredumps(void)
127 {
128 struct rlimit r;
129
130 if (getrlimit(RLIMIT_CORE, &r) == 0) {
131 r.rlim_cur = 0;
132 setrlimit(RLIMIT_CORE, &r);
133 }
134
135 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
136 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
137 #endif
138 }
139