Files
mckernel/test/issues/1181/mmap_large.c
Ken Sato dfd23c3ebe prctl: Add support for PR_SET_THP_DISABLE and PR_GET_THP_DISABLE
Change-Id: I04c5568a9eb78bcac632b734f34bba49cf602c4d
Refs: #1181
2019-01-22 05:40:56 +00:00

33 lines
514 B
C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/mman.h>
#define MAP_SIZE (16 << 20)
int main(int argc, char **argv)
{
int ret = 0;
void *mem = NULL;
mem = mmap(NULL, MAP_SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (!mem) {
printf("mmap failed\n");
ret = -1;
goto out;
}
printf("mmap to %p, size: %ldM\n", mem, MAP_SIZE / 1024 / 1024);
memset(mem, 0, MAP_SIZE);
out:
if (mem) {
munmap(mem, MAP_SIZE);
}
return 0;
}