1  /* Check resulting signal mask from POSIX timer using SIGEV_THREAD.
       2     Copyright (C) 2020-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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 the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <stdio.h>
      20  #include <time.h>
      21  #include <signal.h>
      22  #include <stdbool.h>
      23  
      24  #include <support/check.h>
      25  #include <support/test-driver.h>
      26  #include <support/xthread.h>
      27  
      28  #include <internal-signals.h>
      29  
      30  static pthread_barrier_t barrier;
      31  
      32  static void
      33  thread_handler (union sigval sv)
      34  {
      35    sigset_t ss;
      36    sigprocmask (SIG_BLOCK, NULL, &ss);
      37    if (test_verbose > 0)
      38      printf ("%s: blocked signal mask = { ", __func__);
      39    for (int sig = 1; sig < NSIG; sig++)
      40      {
      41        /* POSIX timers threads created to handle SIGEV_THREAD block all
      42  	 signals except SIGKILL, SIGSTOP and glibc internals ones.  */
      43        if (sigismember (&ss, sig))
      44  	{
      45  	  TEST_VERIFY (sig != SIGKILL && sig != SIGSTOP);
      46  	  TEST_VERIFY (!is_internal_signal (sig));
      47  	}
      48        if (test_verbose && sigismember (&ss, sig))
      49  	printf ("%d, ", sig);
      50      }
      51    if (test_verbose > 0)
      52      printf ("}\n");
      53  
      54    xpthread_barrier_wait (&barrier);
      55  }
      56  
      57  static int
      58  do_test (void)
      59  {
      60    struct sigevent sev = { 0 };
      61    sev.sigev_notify = SIGEV_THREAD;
      62    sev.sigev_notify_function = &thread_handler;
      63  
      64    timer_t timerid;
      65    TEST_COMPARE (timer_create (CLOCK_REALTIME, &sev, &timerid), 0);
      66  
      67    xpthread_barrier_init (&barrier, NULL, 2);
      68  
      69    struct itimerspec trigger = { 0 };
      70    trigger.it_value.tv_nsec = 1000000;
      71    TEST_COMPARE (timer_settime (timerid, 0, &trigger, NULL), 0);
      72  
      73    xpthread_barrier_wait (&barrier);
      74  
      75    return 0;
      76  }
      77  
      78  #include <support/test-driver.c>