From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#9273: 23.3; malloc initialization should (sometimes) happen at runtime Date: Sat, 13 Aug 2011 17:41:45 +0300 Message-ID: <83d3g9weza.fsf@gnu.org> 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> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1313246565 3299 80.91.229.12 (13 Aug 2011 14:42:45 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sat, 13 Aug 2011 14:42:45 +0000 (UTC) Cc: 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 16:42:37 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 1QsFQ4-0006pg-91 for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Aug 2011 16:42:36 +0200 Original-Received: from localhost ([::1]:53123 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFQ3-0007OG-GJ for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Aug 2011 10:42:35 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:57251) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFQ1-0007OA-Ao for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 10:42:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QsFQ0-0007hh-Bg for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 10:42:33 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:48570) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QsFQ0-0007hd-AE for bug-gnu-emacs@gnu.org; Sat, 13 Aug 2011 10:42:32 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QsFRS-0000Px-CQ; Sat, 13 Aug 2011 10:44:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii 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 14:44:02 +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=B9273.13132465981548 (code B ref 9273); Sat, 13 Aug 2011 14:44:02 +0000 Original-Received: (at 9273) by debbugs.gnu.org; 13 Aug 2011 14:43:18 +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 1QsFQk-0000Ou-3c for submit@debbugs.gnu.org; Sat, 13 Aug 2011 10:43:18 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QsFQg-0000Ok-5o for 9273@debbugs.gnu.org; Sat, 13 Aug 2011 10:43:15 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0LPV00600FCN8Y00@a-mtaout20.012.net.il> for 9273@debbugs.gnu.org; Sat, 13 Aug 2011 17:41:41 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.229.155.132]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0LPV0047JFHGKTP0@a-mtaout20.012.net.il>; Sat, 13 Aug 2011 17:41:41 +0300 (IDT) In-reply-to: <4E4680C4.6040605@cornell.edu> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Sat, 13 Aug 2011 10:44:02 -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:50047 Archived-At: > Date: Sat, 13 Aug 2011 09:48:52 -0400 > From: Ken Brown > CC: "9273@debbugs.gnu.org" <9273@debbugs.gnu.org> > > _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.