From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-384399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 5866 invoked by alias); 23 Feb 2012 15:50:32 -0000
Received: (qmail 5838 invoked by uid 22791); 23 Feb 2012 15:50:30 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00,TW_FN
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, 23 Feb 2012 15:50:17 +0000
From: "howarth at nitro dot med.uc.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
Date: Thu, 23 Feb 2012 15:53:00 -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: NEW
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-52179-4-haRaviQyNw@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-52179-4@http.gcc.gnu.org/bugzilla/>
References: <bug-52179-4@http.gcc.gnu.org/bugzilla/>
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: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-02/txt/msg02333.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179

--- Comment #15 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-02-23 15:49:06 UTC ---
I notice in boehm-gc/include/private/gcconfig.h we are already setting...

#   ifdef DARWIN
#     define OS_TYPE "DARWIN"
#     define DYNAMIC_LOADING
#     if defined(__ppc64__)
#       define ALIGNMENT 8
#       define CPP_WORDSZ 64
#       define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
#       define CACHE_LINE_SIZE 64
#       ifndef HBLKSIZE
#         define HBLKSIZE 4096
#       endif
#     else
#       define ALIGNMENT 4
#       define STACKBOTTOM ((ptr_t) 0xc0000000)
#     endif

so I guess we just want to append

#ifdef HAVE_PTHREAD_GET_STACKADDR_NP
#define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self())
#endif

at the end of those lines