memcg_test_4.c revision 354ebb48db8e66a853a58379a4808d5dcd1ceac3 
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
34void 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
47int 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