gdb/testsuite/gdb.base/siginfo.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2004-2015 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 */
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <signal.h>
  23 #include <sys/time.h>
  24
  25 static volatile int done;
  26
  27 #ifdef SA_SIGINFO
  28 static void /* HANDLER */
  29 handler (int sig, siginfo_t *info, void *context)
  30 {
  31   done = 1;
  32 } /* handler */
  33 #else
  34 static void
  35 handler (int sig)
  36 {
  37   done = 1;
  38 } /* handler */
  39 #endif
  40
  41 int
  42 main ()
  43 {
  44   /* Set up the signal handler.  */
  45   {
  46     struct sigaction action;
  47     memset (&action, 0, sizeof (action));
  48 #ifdef SA_SIGINFO
  49     action.sa_sigaction = handler;
  50     action.sa_flags |= SA_SIGINFO;
  51 #else
  52     action.sa_handler = handler;
  53 #endif
  54     sigaction (SIGVTALRM, &action, NULL);
  55   }
  56
  57   /* Set up a one-off timer.  A timer, rather than SIGSEGV, is used as
  58      after a timer handler finishes the interrupted code can safely
  59      resume.  */
  60   {
  61     struct itimerval itime;
  62     memset (&itime, 0, sizeof (itime));
  63     itime.it_value.tv_usec = 250 * 1000;
  64     setitimer (ITIMER_VIRTUAL, &itime, NULL);
  65   }
  66   /* Wait.  */
  67   while (!done);
  68   return 0;
  69 } /* main */