From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26644 invoked by alias); 13 Nov 2013 11:03:54 -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 26586 invoked by uid 48); 13 Nov 2013 11:03:50 -0000 From: "glider at google dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/58994] asan.exp regressions on x86_64 darwin at -m64 but not -m32 at r204372 Date: Wed, 13 Nov 2013 11:03:00 -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: X-Bugzilla-Severity: normal X-Bugzilla-Who: glider at google dot com X-Bugzilla-Status: NEW 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: 2013-11/txt/msg01221.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58994 --- Comment #6 from Alexander Potapenko --- The problem is caused by _NSGetEnviron() being called before libSystem is initialized. This happens because some initialization code calls __cxa_atexit() before libSystem_initialize(), and __cxa_atexit() calls __asan_init() and _NSGetEnviron(). The fix is trivial (call the real __cxa_atexit() if asan_inited == 0 instead of calling __asan_init()), but before landing it I'll check why the crash doesn't happen on LLVM (I suspect different linkage order).