21 lines
551 B
C
21 lines
551 B
C
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/* Verifies that overlapping memory mappings are disallowed. */
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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 *start = (char *) 0x10000000;
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int fd[2];
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CHECK ((fd[0] = open ("zeros")) > 1, "open \"zeros\" once");
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CHECK (mmap (fd[0], start) != MAP_FAILED, "mmap \"zeros\"");
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CHECK ((fd[1] = open ("zeros")) > 1 && fd[0] != fd[1],
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"open \"zeros\" again");
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CHECK (mmap (fd[1], start + 4096) == MAP_FAILED,
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"try to mmap \"zeros\" again");
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}
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