#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>


int
main(int argc, char * argv[])
{
    int   virt_size, fd;
    void *addr;

    addr      = NULL;
    virt_size = 0x18000000;
    addr = mmap(addr, virt_size, (PROT_READ|PROT_WRITE),
		(MAP_NORESERVE|MAP_PRIVATE|MAP_ANON), -1, 0);
    if (addr == MAP_FAILED)
    {
	perror("mapping VM scratch space");
	return -1;
    }

    fd = open("/proc/self/exe", O_RDONLY);
    if (fd < 0)
    {
	perror("open self");
	return -1;
    }

#ifdef PRE_TOUCH
    memset(addr, -1, sysconf(_SC_PAGESIZE));
#endif

    if (read(fd, addr, sysconf(_SC_PAGESIZE)) < 0)
    {
	perror("read");
	close(fd);
	return -1;
    }

    close(fd);

    return 0;
}