From: Richard Biener <rguenther@suse.de>
Date: Thu, 26 Nov 2020 09:07:06 +0000 (+0100)
Subject: testsuite/98002 - fix gcc.dg/strncmp-2.c
X-Git-Tag: releases/gcc-10.3.0~565
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af7bd9c22e114de74fa86ec6f40e336ca1319a50;p=thirdparty%2Fgcc.git

testsuite/98002 - fix gcc.dg/strncmp-2.c

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.

2020-11-16  Richard Biener  <rguenther@suse.de>

	PR testsuite/98002
	* gcc.dg/strncmp-2.c: Call mprotect again before free.

(cherry picked from commit 5b3a8fad18324cd38c221bdb0ae2b690fc82ede0)
---

diff --git a/gcc/testsuite/gcc.dg/strncmp-2.c b/gcc/testsuite/gcc.dg/strncmp-2.c
index 6818b304b36f..0d84f9327676 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);
 }