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 <err.h>
25 #include <signal.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30 #include <unistd.h>
31
32 #define MEM_SIZE (1024 * 1024 * 100)
33
sigusr_handler(int signo)34 void sigusr_handler(int __attribute__ ((unused)) signo)
35 {
36 char *p;
37
38 p = mmap(NULL, MEM_SIZE, PROT_READ | PROT_WRITE,
39 MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
40 if (p == MAP_FAILED) {
41 err(1, "failed to allocate memory!");
42 }
43
44 memset(p, 'z', MEM_SIZE);
45 }
46
main(void)47 int main(void)
48 {
49 struct sigaction sigusr_action;
50
51 memset(&sigusr_action, 0, sizeof(sigusr_action));
52 sigusr_action.sa_handler = &sigusr_handler;
53 sigaction(SIGUSR1, &sigusr_action, NULL);
54
55 while (1)
56 sleep(1);
57
58 return 0;
59 }
60