1*11efff7fSkettenis /* This testcase is part of GDB, the GNU debugger.
2*11efff7fSkettenis
3*11efff7fSkettenis Copyright 2004 Free Software Foundation, Inc.
4*11efff7fSkettenis
5*11efff7fSkettenis This program is free software; you can redistribute it and/or modify
6*11efff7fSkettenis it under the terms of the GNU General Public License as published by
7*11efff7fSkettenis the Free Software Foundation; either version 2 of the License, or
8*11efff7fSkettenis (at your option) any later version.
9*11efff7fSkettenis
10*11efff7fSkettenis This program is distributed in the hope that it will be useful,
11*11efff7fSkettenis but WITHOUT ANY WARRANTY; without even the implied warranty of
12*11efff7fSkettenis MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13*11efff7fSkettenis GNU General Public License for more details.
14*11efff7fSkettenis
15*11efff7fSkettenis You should have received a copy of the GNU General Public License
16*11efff7fSkettenis along with this program; if not, write to the Free Software
17*11efff7fSkettenis Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18*11efff7fSkettenis
19*11efff7fSkettenis */
20*11efff7fSkettenis
21*11efff7fSkettenis #include <stdio.h>
22*11efff7fSkettenis #include <string.h>
23*11efff7fSkettenis #include <signal.h>
24*11efff7fSkettenis #include <sys/time.h>
25*11efff7fSkettenis
26*11efff7fSkettenis static volatile int done;
27*11efff7fSkettenis
28*11efff7fSkettenis static void
handler(int sig)29*11efff7fSkettenis handler (int sig)
30*11efff7fSkettenis {
31*11efff7fSkettenis done = 1;
32*11efff7fSkettenis } /* handler */
33*11efff7fSkettenis
34*11efff7fSkettenis struct itimerval itime;
35*11efff7fSkettenis struct sigaction action;
36*11efff7fSkettenis
37*11efff7fSkettenis /* The enum is so that GDB can easily see these macro values. */
38*11efff7fSkettenis enum {
39*11efff7fSkettenis itimer_real = ITIMER_REAL,
40*11efff7fSkettenis itimer_virtual = ITIMER_VIRTUAL
41*11efff7fSkettenis } itimer = ITIMER_VIRTUAL;
42*11efff7fSkettenis
main()43*11efff7fSkettenis main ()
44*11efff7fSkettenis {
45*11efff7fSkettenis
46*11efff7fSkettenis /* Set up the signal handler. */
47*11efff7fSkettenis memset (&action, 0, sizeof (action));
48*11efff7fSkettenis action.sa_handler = handler;
49*11efff7fSkettenis sigaction (SIGVTALRM, &action, NULL);
50*11efff7fSkettenis sigaction (SIGALRM, &action, NULL);
51*11efff7fSkettenis
52*11efff7fSkettenis /* The values needed for the itimer. This needs to be at least long
53*11efff7fSkettenis enough for the setitimer() call to return. */
54*11efff7fSkettenis memset (&itime, 0, sizeof (itime));
55*11efff7fSkettenis itime.it_value.tv_usec = 250 * 1000;
56*11efff7fSkettenis
57*11efff7fSkettenis /* Loop for ever, constantly taking an interrupt. */
58*11efff7fSkettenis while (1)
59*11efff7fSkettenis {
60*11efff7fSkettenis /* Set up a one-off timer. A timer, rather than SIGSEGV, is
61*11efff7fSkettenis used as after a timer handler finishes the interrupted code
62*11efff7fSkettenis can safely resume. */
63*11efff7fSkettenis setitimer (itimer, &itime, NULL);
64*11efff7fSkettenis /* Wait. */
65*11efff7fSkettenis while (!done);
66*11efff7fSkettenis done = 0;
67*11efff7fSkettenis }
68*11efff7fSkettenis }
69