This makes sure not to free() memory we have mprotected to PROT_NONE
by calling mprotect again with PROT_READ|PROT_WRITE. This avoids
crashing the allocator when in debug mode.
Tested on x86_64-unknown-linux-gnu.
OK?
2020-11-16 Richard Biener <rguent...@suse.de>
PR testsuite/98002
* gcc.dg/strncmp-2.c: Call mprotect again before free.
---
gcc/testsuite/gcc.dg/strncmp-2.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/gcc/testsuite/gcc.dg/strncmp-2.c b/gcc/testsuite/gcc.dg/strncmp-2.c
index 6818b304b36..0d84f932767 100644
--- a/gcc/testsuite/gcc.dg/strncmp-2.c
+++ b/gcc/testsuite/gcc.dg/strncmp-2.c
@@ -40,6 +40,7 @@ static void test_driver_strncmp (void (test_strncmp)(const
char *, const char *,
e = lib_memcmp(buf1,p2,sz);
(*test_memcmp)(buf1,p2,e);
}
+ mprotect (buf2+pgsz,pgsz,PROT_READ|PROT_WRITE);
free(buf2);
}
--
2.26.2
