gdb/testsuite/gdb.threads/attach-into-signal.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2008-2022 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 <signal.h>
  19 #include <unistd.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #ifdef USE_THREADS
  24 #include <pthread.h>
  25 #endif
  26
  27 void action(int sig, siginfo_t * info, void *uc)
  28 {
  29   raise (SIGALRM);
  30 }
  31
  32 static void *func (void *arg)
  33 {
  34   struct sigaction act;
  35
  36   memset (&act, 0, sizeof(struct sigaction));
  37   act.sa_sigaction = action;
  38   act.sa_flags = SA_RESTART;
  39   sigaction (SIGALRM, &act, 0);
  40
  41   raise (SIGALRM);
  42
  43   /* We must not get past this point, either in a free standing or debugged
  44      state.  */
  45
  46   abort ();
  47   /* NOTREACHED */
  48   return NULL;
  49 }
  50
  51 int main ()
  52 {
  53
  54 #ifndef USE_THREADS
  55
  56   func (NULL);
  57
  58 #else
  59
  60   pthread_t th;
  61   pthread_create (&th, NULL, func, NULL);
  62   pthread_join (th, NULL);
  63
  64 #endif
  65
  66   return 0;
  67 }