granicus.if.org Git - strace/blob - tests/restart_syscall.c

   1 /*
   2  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2015-2017 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #include "tests.h"
  10 #include <assert.h>
  11 #include <stdio.h>
  12 #include <stdint.h>
  13 #include <signal.h>
  14 #include <time.h>
  15 #include <sys/time.h>
  16
  17 int
  18 main(void)
  19 {
  20 #if defined __x86_64__ && defined __ILP32__
  21         /*
  22          * x32 is broken from the beginning:
  23          * https://lkml.org/lkml/2015/11/30/790
  24          */
  25         error_msg_and_skip("x32 is broken");
  26 #else
  27         const sigset_t set = {};
  28         const struct sigaction act = { .sa_handler = SIG_IGN };
  29         const struct itimerval itv = { .it_value.tv_usec = 111111 };
  30         struct timespec req = { .tv_nsec = 222222222 }, rem;
  31
  32         assert(sigaction(SIGALRM, &act, NULL) == 0);
  33         assert(sigprocmask(SIG_SETMASK, &set, NULL) == 0);
  34         if (setitimer(ITIMER_REAL, &itv, NULL))
  35                 perror_msg_and_skip("setitimer");
  36         if (nanosleep(&req, &rem))
  37                 perror_msg_and_fail("nanosleep");
  38
  39         printf("nanosleep\\(\\{tv_sec=%lld, tv_nsec=%llu\\}"
  40                ", \\{tv_sec=%lld, tv_nsec=%llu\\}\\)"
  41                " = \\? ERESTART_RESTARTBLOCK \\(Interrupted by signal\\)\n",
  42                (long long) req.tv_sec, zero_extend_signed_to_ull(req.tv_nsec),
  43                (long long) rem.tv_sec, zero_extend_signed_to_ull(rem.tv_nsec));
  44         puts("--- SIGALRM \\{si_signo=SIGALRM, si_code=SI_KERNEL\\} ---");
  45 #ifdef __arm__
  46 /* old kernels used to overwrite ARM_r0 with -EINTR */
  47 # define ALTERNATIVE_NANOSLEEP_REQ "0xfffffffc|"
  48 #else
  49 # define ALTERNATIVE_NANOSLEEP_REQ ""
  50 #endif
  51         printf("(nanosleep\\((%s\\{tv_sec=%lld, tv_nsec=%llu\\})"
  52                ", %p|restart_syscall\\(<\\.\\.\\."
  53                " resuming interrupted nanosleep \\.\\.\\.>)\\) = 0\n",
  54                ALTERNATIVE_NANOSLEEP_REQ,
  55                (long long) req.tv_sec, zero_extend_signed_to_ull(req.tv_nsec),
  56                &rem);
  57
  58         puts("\\+\\+\\+ exited with 0 \\+\\+\\+");
  59         return 0;
  60 #endif
  61 }