1 /*
2 * Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
3 *
4 * Licensed under the GNU GPLv2 or later.
5 * This program 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 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the 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, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 /*
20 * Block on a futex and wait for wakeup.
21 *
22 * This tests uses shared memory page to store the mutex variable.
23 */
24
25 #include <sys/mman.h>
26 #include <sys/wait.h>
27 #include <errno.h>
28
29 #include "test.h"
30 #include "safe_macros.h"
31 #include "futextest.h"
32 #include "futex_common.h"
33
34 const char *TCID="futex_wait02";
35 const int TST_TOTAL=1;
36
do_child(void)37 static void do_child(void)
38 {
39 int ret;
40
41 tst_process_state_wait2(getppid(), 'S');
42
43 ret = futex_wake(futex, 1, 0);
44
45 if (ret != 1)
46 tst_brkm(TFAIL, NULL, "futex_wake() returned %i", ret);
47
48 exit(TPASS);
49 }
50
verify_futex_wait(void)51 static void verify_futex_wait(void)
52 {
53 int res;
54 int pid;
55
56 pid = tst_fork();
57
58 switch (pid) {
59 case 0:
60 do_child();
61 break;
62 case -1:
63 tst_brkm(TBROK | TERRNO, NULL, "fork() failed");
64 break;
65 default:
66 break;
67 }
68
69 res = futex_wait(futex, *futex, NULL, 0);
70
71 if (res) {
72 tst_resm(TFAIL, "futex_wait() returned %i, errno %s",
73 res, tst_strerrno(errno));
74 }
75
76 SAFE_WAIT(NULL, &res);
77
78 if (WIFEXITED(res) && WEXITSTATUS(res) == TPASS)
79 tst_resm(TPASS, "futex_wait() woken up");
80 else
81 tst_resm(TFAIL, "child failed");
82 }
83
main(int argc,char * argv[])84 int main(int argc, char *argv[])
85 {
86 int lc;
87
88 tst_parse_opts(argc, argv, NULL, NULL);
89
90 setup();
91
92 for (lc = 0; TEST_LOOPING(lc); lc++)
93 verify_futex_wait();
94
95 tst_exit();
96 }
97