From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#9273: 23.3; malloc initialization should (sometimes) happen at runtime Date: Sat, 13 Aug 2011 11:07:48 -0400 Message-ID: References: <4E41940C.2010605@cornell.edu> <83zkjhxnty.fsf@gnu.org> <4E444D85.4090907@cornell.edu> <838vqzxgq1.fsf@gnu.org> <4E44FC1B.9010207@cornell.edu> <831uwqyidi.fsf@gnu.org> <4E451A1F.4060409@cornell.edu> <4E458BF4.9080108@cornell.edu> <83fwl5wxbz.fsf@gnu.org> <4E4680C4.6040605@cornell.edu> <83d3g9weza.fsf@gnu.org> <4E468FE5.100@cornell.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1313248121 11218 80.91.229.12 (13 Aug 2011 15:08:41 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sat, 13 Aug 2011 15:08:41 +0000 (UTC) Cc: "9273@debbugs.gnu.org" <9273@debbugs.gnu.org> To: Ken Brown Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Aug 13 17:08:35 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QsFpD-0004W2-Jr for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Aug 2011 17:08:35 +0200 Original-Received: from localhost ([::1]:35246 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFpD-0002Kz-3u for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Aug 2011 11:08:35 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:60652) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFpA-0002Ks-IO for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 11:08:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QsFp9-00039t-JL for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 11:08:32 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:49328) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFp9-00039l-Hi for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 11:08:31 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QsFqc-0000z1-3v; Sat, 13 Aug 2011 11:10:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 13 Aug 2011 15:10:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 9273 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 9273-submit@debbugs.gnu.org id=B9273.13132481623728 (code B ref 9273); Sat, 13 Aug 2011 15:10:02 +0000 Original-Received: (at 9273) by debbugs.gnu.org; 13 Aug 2011 15:09:22 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QsFpy-0000y5-NT for submit@debbugs.gnu.org; Sat, 13 Aug 2011 11:09:22 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.183] helo=ironport2-out.pppoe.ca) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QsFpx-0000xy-50 for 9273@debbugs.gnu.org; Sat, 13 Aug 2011 11:09:21 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EALOSRk5FxKeo/2dsb2JhbABBDqdpeIFAAQEFViMQCw4mEhQYDSTBKIZHBJ9ug2FU X-IronPort-AV: E=Sophos;i="4.67,367,1309752000"; d="scan'208";a="131001511" Original-Received: from 69-196-167-168.dsl.teksavvy.com (HELO ceviche.home) ([69.196.167.168]) by ironport2-out.pppoe.ca with ESMTP/TLS/ADH-AES256-SHA; 13 Aug 2011 11:07:48 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 26540660CF; Sat, 13 Aug 2011 11:07:48 -0400 (EDT) In-Reply-To: <4E468FE5.100@cornell.edu> (Ken Brown's message of "Sat, 13 Aug 2011 10:53:25 -0400") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Sat, 13 Aug 2011 11:10:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:50049 Archived-At: >>> _heapinfo is indeed consistent with the current heap. But the pointer >>> that was passed to realloc points into the old heap. So applying BLOCK >>> to that pointer yields an absurd result. I can easily catch such cases >>> by testing for ptr< _heapbase, as in my patch to _free_internal_nolock, >>> but I have to figure out the best way to handle them once I've caught >>> them. >> malloc a buffer, then copy the contents of the old one to the new >> one. You will have to know the size of the old block, which means you >> will have to access the old copy of _heapinfo. > Thanks! That's much easier than what I was trying to do. Wouldn't it be easier to try and convince malloc to keep using the old _heapinfo? Stefan