From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 704 invoked by alias); 18 Feb 2015 09:47:37 -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 631 invoked by uid 55); 18 Feb 2015 09:47:33 -0000 From: "mpolacek at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/65081] -fsanitize=object-size fails with simple pointer arithm Date: Wed, 18 Feb 2015 09:47:00 -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: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mpolacek at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: mpolacek at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 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: 2015-02/txt/msg01967.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65081 --- Comment #5 from Marek Polacek --- Author: mpolacek Date: Wed Feb 18 09:46:59 2015 New Revision: 220784 URL: https://gcc.gnu.org/viewcvs?rev=220784&root=gcc&view=rev Log: PR sanitizer/65081 * ubsan.c (OBJSZ_MAX_OFFSET): Define. (ubsan_expand_objsize_ifn): Don't emit run-time check if the offset is in range [-16K, -1]. Don't issue run-time error if (ptr > ptr + offset). * c-c++-common/ubsan/pr65081.c: New test. Added: trunk/gcc/testsuite/c-c++-common/ubsan/pr65081.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/ubsan.c