gdb/testsuite/gdb.threads/signal-delivered-right-thread.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2014-2023 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <pthread.h>
  22 #include <signal.h>
  23
  24 pthread_barrier_t barrier;
  25
  26 void
  27 handler (int sig)
  28 {
  29 }
  30
  31 void *
  32 thread_function (void *arg)
  33 {
  34   pthread_barrier_wait (&barrier);
  35
  36   while (1)
  37     usleep (1);
  38 }
  39
  40 int
  41 main (void)
  42 {
  43   pthread_t child_thread[2];
  44   int i;
  45
  46   signal (SIGUSR1, handler);
  47
  48   pthread_barrier_init (&barrier, NULL, 3);
  49
  50   for (i = 0; i < 2; i++)
  51     pthread_create (&child_thread[i], NULL, thread_function, NULL);
  52
  53   pthread_barrier_wait (&barrier);
  54
  55   pthread_kill (child_thread[0], SIGUSR1);
  56
  57   for (i = 0; i < 2; i++)
  58     pthread_join (child_thread[i], NULL);
  59
  60   return 0;
  61 }