1 /*
2 * Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
3 *
4 * Based on futextest (futext_wait_uninitialized_heap.c)
5 * written by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
6 *
7 * Licensed under the GNU GPLv2 or later.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22 /*
23 * Wait on uninitialized heap. It shold be zero and FUTEX_WAIT should return
24 * immediately. This test tests zero page handling in futex code.
25 */
26
27 #include <errno.h>
28
29 #include "test.h"
30 #include "safe_macros.h"
31 #include "futextest.h"
32
33 const char *TCID="futex_wait04";
34 const int TST_TOTAL=1;
35 static struct timespec to = {.tv_sec = 0, .tv_nsec = 10000};
36
verify_futex_wait(void)37 static void verify_futex_wait(void)
38 {
39 int res;
40 void *buf;
41 size_t pagesize = getpagesize();
42 buf = SAFE_MMAP(NULL, NULL, pagesize, PROT_READ|PROT_WRITE,
43 MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
44
45 res = futex_wait(buf, 1, &to, 0);
46
47 if (res == -1 && errno == EWOULDBLOCK)
48 tst_resm(TPASS | TERRNO, "futex_wait() returned %i", res);
49 else
50 tst_resm(TFAIL | TERRNO, "futex_wait() returned %i", res);
51
52 SAFE_MUNMAP(NULL, buf, pagesize);
53 }
54
main(int argc,char * argv[])55 int main(int argc, char *argv[])
56 {
57 int lc;
58
59 tst_parse_opts(argc, argv, NULL, NULL);
60
61 for (lc = 0; TEST_LOOPING(lc); lc++)
62 verify_futex_wait();
63
64 tst_exit();
65 }
66