/* Maps and unmaps a file and verifies that the mapped region is
inaccessible afterward. */
#include
#include “tests/vm/sample.inc”
#include “tests/lib.h”
#include “tests/main.h”
#define ACTUAL ((void *) 0x10000000)
void
test_main (void)
{
int handle;
mapid_t map;
CHECK ((handle = open (“sample.txt”)) > 1, “open \”sample.txt\””);
CHECK ((map = mmap (handle, ACTUAL)) != MAP_FAILED, “mmap \”sample.txt\””);
munmap (map);
fail (“unmapped memory is readable (%d)”, *(int *) ACTUAL);
}