From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: 64-bit emacs crashes a lot Date: Fri, 16 Aug 2013 16:31:43 +0300 Message-ID: <83txipn4n4.fsf@gnu.org> References: <51F3151D.7040000@cs.utoronto.ca> <51F33565.1090406@cornell.edu> <51F33F52.4060405@cs.utoronto.ca> <51FB1D9E.5090102@cs.utoronto.ca> <20130802080211.GA18054@calimero.vinschen.de> <51FB9228.2020309@cornell.edu> <51FBA100.90005@cs.utoronto.ca> <51FD5462.5020400@cs.utoronto.ca> <51FFBDFF.7040501@cornell.edu> <51FFC4F2.8080909@cs.utoronto.ca> <5203D89E.6030801@cornell.edu> <5203DCCA.1010105@cs.utoronto.ca> <5205B364.8090007@cs.utoronto.ca> <52064730.50404@cornell.edu> <"52065B3C.6060104@cs.utoronto <520CCA41.3000107"@cs.utoronto.ca> <520D089A.1020806@cornell.edu> <83ioz6op5v.fsf@gnu.org> <520D4036.8010303@cs.utoronto.ca> <520D900A.8000907@cornell.edu> <834naqnh9t.fsf@gnu.org> <520E0FF8.1070709@cs.utoronto.ca> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1376659883 10464 80.91.229.3 (16 Aug 2013 13:31:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 16 Aug 2013 13:31:23 +0000 (UTC) Cc: emacs-devel@gnu.org To: Ryan Johnson Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Aug 16 15:31:25 2013 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VAK7g-0007LB-UP for ged-emacs-devel@m.gmane.org; Fri, 16 Aug 2013 15:31:25 +0200 Original-Received: from localhost ([::1]:59061 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VAK7g-0006bs-GN for ged-emacs-devel@m.gmane.org; Fri, 16 Aug 2013 09:31:24 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33980) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VAK7Z-0006at-KA for emacs-devel@gnu.org; Fri, 16 Aug 2013 09:31:22 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VAK7U-0001cB-Ps for emacs-devel@gnu.org; Fri, 16 Aug 2013 09:31:17 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:35430) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VAK7U-0001c3-Hw for emacs-devel@gnu.org; Fri, 16 Aug 2013 09:31:12 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0MRM00I00LI3CM00@a-mtaout20.012.net.il> for emacs-devel@gnu.org; Fri, 16 Aug 2013 16:31:10 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MRM00IJ5LJY2650@a-mtaout20.012.net.il>; Fri, 16 Aug 2013 16:31:10 +0300 (IDT) In-reply-to: <520E0FF8.1070709@cs.utoronto.ca> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.166 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:162811 Archived-At: > Date: Fri, 16 Aug 2013 07:41:44 -0400 > From: Ryan Johnson > > On 16/08/2013 4:58 AM, Eli Zaretskii wrote: > > Again, please move this discussion to emacs-devel. > Back pointer: http://cygwin.com/ml/cygwin/2013-08/msg00273.html > > >> Date: Thu, 15 Aug 2013 22:35:54 -0400 > >> From: Ken Brown > >> > >> 1. Invoke 'emacs-nox -Q' in mintty. > >> > >> 2. M-x compile C-a C-k ls RET > >> > >> 3. C-x o > >> > >> 4. Hit 'g' repeatedly. > >> > >> I got it to abort with Fatal error 6 after slightly over 100 repetitions. > >> > >> I then tried the same thing with emacs-X11 (running under X, not in > >> mintty). I hit 'g' 200 times without a problem. I repeated this with > >> emacs-w32, again 200 times without a problem. > >> > >> So there's a bug somewhere. But if it's an emacs bug, it's strange that > >> it only occurs with emacs-nox and not with either of the GUI versions of > >> emacs. > > I suspect that buffer relocation might be the reason. Can you show a > > backtrace from the fatal error in an unoptimized build, with the above > > recipe? > I'll try to get one. Meanwhile, is there a quick way to disable buffer > relocation as a sanity test? I don't think so, but maybe it's already disabled in your build. What do you see on these two lines when configure finishes: Should Emacs use a relocating allocator for buffers? yes Should Emacs use mmap(2) for buffer allocation? no In any case, you could configure with --enable-checking=all, it might catch the problem earlier. > If the optimized build still crashes reliably without it, the real > problem is probably something else. Maybe, but not necessarily.