diff options
Diffstat (limited to 'string/stratcliff.c')
| -rw-r--r-- | string/stratcliff.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/string/stratcliff.c b/string/stratcliff.c index 5f6a467..10c1f1f 100644 --- a/string/stratcliff.c +++ b/string/stratcliff.c @@ -14,12 +14,14 @@ int main (int argc, char *argv[]) { size_t size = sysconf (_SC_PAGESIZE); - char *adr; + char *adr, *dest; int result = 0; - adr = (char *) mmap (NULL, size, PROT_READ|PROT_WRITE, - MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); - if (adr == NULL) + adr = (char *) mmap (NULL, 3 * size, PROT_READ|PROT_WRITE, + MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); + dest = (char *) mmap (NULL, 3*size, PROT_READ|PROT_WRITE, + MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); + if (adr == (char *)-1L || dest == (char *)-1L) { if (errno == ENOSYS) puts ("No test, mmap not available."); @@ -31,9 +33,16 @@ main (int argc, char *argv[]) } else { - char dest[size]; int inner, middle, outer; + mprotect(adr, size, PROT_NONE); + mprotect(adr+2*size, size, PROT_NONE); + adr += size; + + mprotect(dest, size, PROT_NONE); + mprotect(dest+2*size, size, PROT_NONE); + dest += size; + memset (adr, 'T', size); /* strlen test */ |