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-rw-r--r--string/stratcliff.c19
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 */