[deliverable/linux.git] / tools / testing / selftests / vm / on-fault-limit.c

#include <sys/mman.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>

#ifndef MCL_ONFAULT
#define MCL_ONFAULT (MCL_FUTURE << 1)
#endif

static int test_limit(void)
{
	int ret = 1;
	struct rlimit lims;
	void *map;

	if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
		perror("getrlimit");
		return ret;
	}

	if (mlockall(MCL_ONFAULT | MCL_FUTURE)) {
		perror("mlockall");
		return ret;
	}

	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, 0, 0);
	if (map != MAP_FAILED)
		printf("mmap should have failed, but didn't\n");
	else {
		ret = 0;
		munmap(map, 2 * lims.rlim_max);
	}

	munlockall();
	return ret;
}

int main(int argc, char **argv)
{
	int ret = 0;

	ret += test_limit();
	return ret;
}
Commit	Line	Data
b3b0d09c EM	1	#include <sys/mman.h>
	2	#include <stdio.h>
	3	#include <unistd.h>
	4	#include <string.h>
	5	#include <sys/time.h>
	6	#include <sys/resource.h>
	7
	8	#ifndef MCL_ONFAULT
	9	#define MCL_ONFAULT (MCL_FUTURE << 1)
	10	#endif
	11
	12	static int test_limit(void)
	13	{
	14	int ret = 1;
	15	struct rlimit lims;
	16	void *map;
	17
	18	if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
	19	perror("getrlimit");
	20	return ret;
	21	}
	22
bff12468	23	if (mlockall(MCL_ONFAULT \| MCL_FUTURE)) {
b3b0d09c EM	24	perror("mlockall");
	25	return ret;
	26	}
	27
	28	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ \| PROT_WRITE,
	29	MAP_PRIVATE \| MAP_ANONYMOUS \| MAP_POPULATE, 0, 0);
	30	if (map != MAP_FAILED)
	31	printf("mmap should have failed, but didn't\n");
	32	else {
	33	ret = 0;
	34	munmap(map, 2 * lims.rlim_max);
	35	}
	36
	37	munlockall();
	38	return ret;
	39	}
	40
	41	int main(int argc, char **argv)
	42	{
	43	int ret = 0;
	44
	45	ret += test_limit();
	46	return ret;
	47	}