From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22584 invoked by alias); 11 Feb 2014 14:20:27 -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 22510 invoked by uid 48); 11 Feb 2014 14:20:24 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/60142] [4.9 Regression][asan] -fsanitize=address breaks debugging - stepping into functions no longer possible Date: Tue, 11 Feb 2014 14:20:00 -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: 4.9.0 X-Bugzilla-Keywords: wrong-debug X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub 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: 4.9.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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: 2014-02/txt/msg01046.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60142 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jkratoch at gcc dot gnu.org, | |tromey at gcc dot gnu.org --- Comment #2 from Jakub Jelinek --- Works also with -O1 -fsanitize=address -g or -O0 -fsanitize=address -g --param asan-use-after-return=0. My guess is that for -O0 gdb has some code to detect function prologues/epilogues and get's upset by the conditionals in use-after-return prologue (or epilogue?) instrumentation. CCing some GDB folks to find out if it isn't just a GDB bug, or what exactly would they like to see from GCC in this case, so that they can handle it.