44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
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/* Deletes and closes file that is mapped into memory
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and verifies that it can still be read through the mapping. */
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#include <string.h>
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#include <syscall.h>
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#include "tests/vm/sample.inc"
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#include "tests/lib.h"
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#include "tests/main.h"
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void
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test_main (void)
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{
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char *actual = (char *) 0x10000000;
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int handle;
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mapid_t map;
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size_t i;
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/* Map file. */
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CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
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CHECK ((map = mmap (handle, actual)) != MAP_FAILED, "mmap \"sample.txt\"");
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/* Close file and delete it. */
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close (handle);
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CHECK (remove ("sample.txt"), "remove \"sample.txt\"");
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CHECK (open ("sample.txt") == -1, "try to open \"sample.txt\"");
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/* Create a new file in hopes of overwriting data from the old
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one, in case the file system has incorrectly freed the
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file's data. */
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CHECK (create ("another", 4096 * 10), "create \"another\"");
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/* Check that mapped data is correct. */
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if (memcmp (actual, sample, strlen (sample)))
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fail ("read of mmap'd file reported bad data");
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/* Verify that data is followed by zeros. */
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for (i = strlen (sample); i < 4096; i++)
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if (actual[i] != 0)
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fail ("byte %zu of mmap'd region has value %02hhx (should be 0)",
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i, actual[i]);
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munmap (map);
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}
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