42 lines
835 B
C
42 lines
835 B
C
/* Test object-spanning accesses. This is most conveniently done with
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mmap, thus the config.h specificity here. */
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#include "../config.h"
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#include <unistd.h>
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#include <string.h>
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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int main ()
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{
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#ifndef MAP_ANONYMOUS
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#ifdef HAVE_MMAP
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void *p;
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unsigned pg = getpagesize ();
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int rc;
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p = mmap (NULL, 4 * pg, PROT_READ|PROT_WRITE,
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MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
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if (p == NULL)
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return 1;
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memset (p, 0, 4*pg);
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rc = munmap (p, pg);
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if (rc < 0) return 1;
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memset (p+pg, 0, 3*pg);
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rc = munmap (p+pg, pg);
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if (rc < 0) return 1;
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memset (p+2*pg, 0, 2*pg);
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rc = munmap (p+2*pg, pg);
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if (rc < 0) return 1;
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memset (p+3*pg, 0, pg);
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rc = munmap (p+3*pg, pg);
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if (rc < 0) return 1;
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#endif
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return 0;
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}
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