/* Maps a file into memory and runs child-inherit to verify that
mappings are not inherited. */
#include
#include
#include “tests/vm/sample.inc”
#include “tests/lib.h”
#include “tests/main.h”
void
test_main (void)
{
char *actual = (char *) 0x54321000;
int handle;
pid_t child;
/* Open file, map, verify data. */
CHECK ((handle = open (“sample.txt”)) > 1, “open \”sample.txt\””);
CHECK (mmap (handle, actual) != MAP_FAILED, “mmap \”sample.txt\””);
if (memcmp (actual, sample, strlen (sample)))
fail (“read of mmap’d file reported bad data”);
/* Spawn child and wait. */
CHECK ((child = exec (“child-inherit”)) != -1, “exec \”child-inherit\””);
quiet = true;
CHECK (wait (child) == -1, “wait for child (should return -1)”);
quiet = false;
/* Verify data again. */
CHECK (!memcmp (actual, sample, strlen (sample)),
“checking that mmap’d file still has same data”);
}