1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2004-2020 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
25static volatile int done;
26
27#ifdef SA_SIGINFO
28static void /* HANDLER */
29handler (int sig, siginfo_t *info, void *context)
30{
31  done = 1;
32} /* handler */
33#else
34static void
35handler (int sig)
36{
37  done = 1;
38} /* handler */
39#endif
40
41int
42main ()
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 */
70