blob: 5f7444d99b7a25ccc8260d0d9cd6e05a95c287d5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
/* Deletes and closes file that is mapped into memory
and verifies that it can still be read through the mapping. */
#include <string.h>
#include <syscall.h>
#include "tests/vm/sample.inc"
#include "tests/lib.h"
#include "tests/main.h"
void
test_main (void)
{
char *actual = (char *) 0x10000000;
int handle;
mapid_t map;
size_t i;
/* Map file. */
CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
CHECK ((map = mmap (handle, actual)) != MAP_FAILED, "mmap \"sample.txt\"");
/* Close file and delete it. */
close (handle);
CHECK (remove ("sample.txt"), "remove \"sample.txt\"");
CHECK (open ("sample.txt") == -1, "try to open \"sample.txt\"");
/* Create a new file in hopes of overwriting data from the old
one, in case the file system has incorrectly freed the
file's data. */
CHECK (create ("another", 4096 * 10), "create \"another\"");
/* Check that mapped data is correct. */
if (memcmp (actual, sample, strlen (sample)))
fail ("read of mmap'd file reported bad data");
/* Verify that data is followed by zeros. */
for (i = strlen (sample); i < 4096; i++)
if (actual[i] != 0)
fail ("byte %zu of mmap'd region has value %02hhx (should be 0)",
i, actual[i]);
munmap (map);
}
|
