rt/tst-timer-sigmask.c

   1 /* Check resulting signal mask from POSIX timer using SIGEV_THREAD.
   2    Copyright (C) 2020-2021 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>