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f0fd9238 AC |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
7b6bb8da | 3 | Copyright 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
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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 | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
f0fd9238 AC |
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. | |
a9762ec7 | 14 | |
f0fd9238 | 15 | You should have received a copy of the GNU General Public License |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 | |
18 | */ | |
19 | ||
20 | #include <stdio.h> | |
e425eb2b | 21 | #include <string.h> |
f0fd9238 AC |
22 | #include <signal.h> |
23 | #include <sys/time.h> | |
501b79c1 | 24 | #include <errno.h> |
f0fd9238 AC |
25 | |
26 | static volatile int done; | |
27 | ||
28 | static void | |
29 | handler (int sig) | |
30 | { | |
31 | done = 1; | |
32 | } /* handler */ | |
33 | ||
b04e311d AC |
34 | struct itimerval itime; |
35 | struct sigaction action; | |
36 | ||
37 | /* The enum is so that GDB can easily see these macro values. */ | |
38 | enum { | |
39 | itimer_real = ITIMER_REAL, | |
40 | itimer_virtual = ITIMER_VIRTUAL | |
41 | } itimer = ITIMER_VIRTUAL; | |
42 | ||
501b79c1 | 43 | int |
f0fd9238 AC |
44 | main () |
45 | { | |
b04e311d | 46 | |
501b79c1 | 47 | int res; |
f0fd9238 | 48 | /* Set up the signal handler. */ |
b04e311d AC |
49 | memset (&action, 0, sizeof (action)); |
50 | action.sa_handler = handler; | |
51 | sigaction (SIGVTALRM, &action, NULL); | |
52 | sigaction (SIGALRM, &action, NULL); | |
53 | ||
54 | /* The values needed for the itimer. This needs to be at least long | |
55 | enough for the setitimer() call to return. */ | |
56 | memset (&itime, 0, sizeof (itime)); | |
57 | itime.it_value.tv_usec = 250 * 1000; | |
58 | ||
59 | /* Loop for ever, constantly taking an interrupt. */ | |
60 | while (1) | |
61 | { | |
62 | /* Set up a one-off timer. A timer, rather than SIGSEGV, is | |
63 | used as after a timer handler finishes the interrupted code | |
64 | can safely resume. */ | |
501b79c1 PM |
65 | res = setitimer (itimer, &itime, NULL); |
66 | if (res == -1) | |
67 | { | |
68 | printf ("First call to setitimer failed, errno = %d\r\n",errno); | |
69 | itimer = ITIMER_REAL; | |
70 | res = setitimer (itimer, &itime, NULL); | |
71 | if (res == -1) | |
72 | { | |
73 | printf ("Second call to setitimer failed, errno = %d\r\n",errno); | |
74 | return 1; | |
75 | } | |
76 | } | |
b04e311d AC |
77 | /* Wait. */ |
78 | while (!done); | |
79 | done = 0; | |
80 | } | |
501b79c1 | 81 | return 0; |
b04e311d | 82 | } |