mmap-close.c

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/** Verifies that memory mappings persist after file close. */
 
#include <string.h>
#include <syscall.h>
#include "tests/vm/sample.inc"
#include "tests/arc4.h"
#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\"");
 
  close (handle);
 
  if (memcmp (ACTUAL, sample, strlen (sample)))
    fail ("read of mmap'd file reported bad data");
 
  munmap (map);
}