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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [testsuite/] [gdb.base/] [sigstep.c] - Blame information for rev 842

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Line No. Rev Author Line
1 227 jeremybenn
/* This testcase is part of GDB, the GNU debugger.
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   Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <errno.h>
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static volatile int done;
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static void
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handler (int sig)
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{
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  done = 1;
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} /* handler */
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struct itimerval itime;
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struct sigaction action;
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/* The enum is so that GDB can easily see these macro values.  */
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enum {
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  itimer_real = ITIMER_REAL,
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  itimer_virtual = ITIMER_VIRTUAL
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} itimer = ITIMER_VIRTUAL;
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int
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main ()
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{
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  int res;
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  /* Set up the signal handler.  */
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  memset (&action, 0, sizeof (action));
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  action.sa_handler = handler;
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  sigaction (SIGVTALRM, &action, NULL);
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  sigaction (SIGALRM, &action, NULL);
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  /* The values needed for the itimer.  This needs to be at least long
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     enough for the setitimer() call to return.  */
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  memset (&itime, 0, sizeof (itime));
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  itime.it_value.tv_usec = 250 * 1000;
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  /* Loop for ever, constantly taking an interrupt.  */
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  while (1)
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    {
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      /* Set up a one-off timer.  A timer, rather than SIGSEGV, is
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         used as after a timer handler finishes the interrupted code
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         can safely resume.  */
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      res = setitimer (itimer, &itime, NULL);
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      if (res == -1)
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        {
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          printf ("First call to setitimer failed, errno = %d\r\n",errno);
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          itimer = ITIMER_REAL;
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          res = setitimer (itimer, &itime, NULL);
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          if (res == -1)
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            {
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              printf ("Second call to setitimer failed, errno = %d\r\n",errno);
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              return 1;
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            }
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        }
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      /* Wait.  */
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      while (!done);
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      done = 0;
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    }
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  return 0;
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}

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