From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25684 invoked by alias); 17 Apr 2014 05:04:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 25606 invoked by uid 48); 17 Apr 2014 05:03:55 -0000 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/60861] out of bounds access of global var in .rodata/.bss not detected Date: Thu, 17 Apr 2014 05:04:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: sanitizer X-Bugzilla-Version: 4.8.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-04/txt/msg01245.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60861 --- Comment #4 from Andrew Pinski --- (In reply to Yury Gribov from comment #3) > I can reproduce this in trunk. Looks like Asan pass works correctly but gcc > reduces test() to 'return 1;' very early for some reason. I'll debug further. Most likely due to GCC optimizing the code as it knows the only value it could be is 1. Try it with a two element constant array and you most likely get the result you want.