1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <stdio.h>
33 #include <stdint.h>
34 #include <signal.h>
35 #include <time.h>
36 #include <sys/time.h>
37
38 int
main(void)39 main(void)
40 {
41 #if defined __x86_64__ && defined __ILP32__
42 /*
43 * x32 is broken from the beginning:
44 * https://lkml.org/lkml/2015/11/30/790
45 */
46 return 77;
47 #else
48 const sigset_t set = {};
49 const struct sigaction act = { .sa_handler = SIG_IGN };
50 const struct itimerval itv = { .it_value.tv_usec = 111111 };
51 struct timespec req = { .tv_nsec = 222222222 }, rem;
52
53 if (sigaction(SIGALRM, &act, NULL))
54 return 77;
55 if (sigprocmask(SIG_SETMASK, &set, NULL))
56 return 77;
57 if (setitimer(ITIMER_REAL, &itv, NULL))
58 return 77;
59 if (nanosleep(&req, &rem))
60 return 0;
61
62 printf("nanosleep\\(\\{%jd, %jd\\}, \\{%jd, %jd\\}\\)"
63 " = \\? ERESTART_RESTARTBLOCK \\(Interrupted by signal\\)\n",
64 (intmax_t) req.tv_sec, (intmax_t) req.tv_nsec,
65 (intmax_t) rem.tv_sec, (intmax_t) rem.tv_nsec);
66 puts("--- SIGALRM \\{si_signo=SIGALRM, si_code=SI_KERNEL\\} ---");
67 #ifdef __arm__
68 /* old kernels used to overwrite ARM_r0 with -EINTR */
69 # define ALTERNATIVE_NANOSLEEP_REQ "0xfffffffc|"
70 #else
71 # define ALTERNATIVE_NANOSLEEP_REQ ""
72 #endif
73 printf("(nanosleep\\((%s\\{%jd, %jd\\}), %p|restart_syscall\\(<\\.\\.\\."
74 " resuming interrupted nanosleep \\.\\.\\.>)\\) = 0\n",
75 ALTERNATIVE_NANOSLEEP_REQ,
76 (intmax_t) req.tv_sec, (intmax_t) req.tv_nsec, &rem);
77
78 puts("\\+\\+\\+ exited with 0 \\+\\+\\+");
79 return 0;
80 #endif
81 }
82