1 /******************************************************************************/
2 /* */
3 /* Copyright (c) 2009 FUJITSU LIMITED */
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 2 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 */
13 /* the 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, write to the Free Software */
17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
18 /* */
19 /* Author: Li Zefan <lizf@cn.fujitsu.com> */
20 /* */
21 /******************************************************************************/
22
23 #include <sys/mman.h>
24 #include <signal.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <unistd.h>
28
sigusr_handler(int signo)29 void sigusr_handler(int __attribute__ ((unused)) signo)
30 {
31 char *p;
32 int size = getpagesize() * 2;
33
34 p = mmap(NULL, size, PROT_READ | PROT_WRITE,
35 MAP_PRIVATE | MAP_ANONYMOUS | MAP_LOCKED, 0, 0);
36 if (p == MAP_FAILED)
37 exit(1);
38 }
39
main(void)40 int main(void)
41 {
42 struct sigaction sigusr_action;
43
44 memset(&sigusr_action, 0, sizeof(sigusr_action));
45 sigusr_action.sa_handler = &sigusr_handler;
46 sigaction(SIGUSR1, &sigusr_action, NULL);
47
48 while (1)
49 sleep(1);
50
51 return 0;
52 }
53