From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2129 invoked by alias); 9 Feb 2012 00:35:07 -0000 Received: (qmail 1914 invoked by uid 22791); 9 Feb 2012 00:35:05 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 09 Feb 2012 00:34:51 +0000 From: "howarth at nitro dot med.uc.edu" To: gcc-bugs@gcc.gnu.org Subject: [Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11 Date: Thu, 09 Feb 2012 00:35:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: boehm-gc X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: howarth at nitro dot med.uc.edu X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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 X-SW-Source: 2012-02/txt/msg00915.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #2 from Jack Howarth 2012-02-09 00:34:19 UTC --- Rebuilding x86_64-apple-darwin11.3.0/boehm-gc with -g -O0 -DDARWIN_DEBUG and the failing gctest at -m64 with the same allows the following backtrace to be obtained with aslr active under Lion... # gdb ./gctest GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared libraries .... done (gdb) set disable-aslr off (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/gctest Reading symbols for shared libraries + done Reading symbols for shared libraries ++++........................ done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x00007fff690f63d8 GC_mark_from (mark_stack_top=0x10953f000, mark_stack=0x10953f000, mark_stack_limit=0x10954f000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) bt #0 GC_mark_from (mark_stack_top=0x10953f000, mark_stack=0x10953f000, mark_stack_limit=0x10954f000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 #1 0x0000000109498947 in GC_mark_some (cold_gc_frame=0x7fff6907164c "\001") at ../../../gcc-4.7-20120207/boehm-gc/mark.c:361 #2 0x00000001094906ae in GC_stopped_mark (stop_func=0x10948fb88 ) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:531 #3 0x000000010949026a in GC_try_to_collect_inner (stop_func=0x10948fb88 ) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:378 #4 0x000000010949c222 in GC_init_inner () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:789 #5 0x000000010949bdbd in GC_init () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:493 #6 0x00000001094758ec in main () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.c/gctest.c:1803 (gdb)