From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Dmitry Antipov Newsgroups: gmane.emacs.devel Subject: Broken !GC_MARK_STACK [Re: conservative stack scanning] Date: Sat, 12 Jan 2013 06:15:57 +0400 Message-ID: <50F0C75D.1040607@yandex.ru> References: <50EFC75B.3000308@cs.ucla.edu> <83hamoulkj.fsf@gnu.org> <50F063DD.2040504@cs.ucla.edu> <50F0C1A4.40309@cs.ucla.edu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1357956922 20992 80.91.229.3 (12 Jan 2013 02:15:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 12 Jan 2013 02:15:22 +0000 (UTC) Cc: gpion@lfdj.com, Eli Zaretskii , Stefan Monnier , emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jan 12 03:15:39 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 1TtqdH-0005Ti-9p for ged-emacs-devel@m.gmane.org; Sat, 12 Jan 2013 03:15:39 +0100 Original-Received: from localhost ([::1]:60984 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ttqd1-0005oa-2S for ged-emacs-devel@m.gmane.org; Fri, 11 Jan 2013 21:15:23 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:52450) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ttqcw-0005nb-Pj for emacs-devel@gnu.org; Fri, 11 Jan 2013 21:15:22 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ttqcs-0005Ux-CG for emacs-devel@gnu.org; Fri, 11 Jan 2013 21:15:18 -0500 Original-Received: from forward13.mail.yandex.net ([95.108.130.120]:60764) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ttqcm-0005Ok-FU; Fri, 11 Jan 2013 21:15:08 -0500 Original-Received: from smtp13.mail.yandex.net (smtp13.mail.yandex.net [95.108.130.68]) by forward13.mail.yandex.net (Yandex) with ESMTP id E24BA140BC1; Sat, 12 Jan 2013 06:15:03 +0400 (MSK) Original-Received: from smtp13.mail.yandex.net (localhost [127.0.0.1]) by smtp13.mail.yandex.net (Yandex) with ESMTP id 84352E405AB; Sat, 12 Jan 2013 06:15:03 +0400 (MSK) Original-Received: from unknown (unknown [37.139.80.10]) by smtp13.mail.yandex.net (nwsmtp/Yandex) with ESMTP id F3eKq6c4-F3eK2seB; Sat, 12 Jan 2013 06:15:03 +0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1357956903; bh=079Pb+Fm3xFAFkrLVu8RCI4MO8Q+wwR6LKF6K3fpMZw=; h=Message-ID:Date:From:User-Agent:MIME-Version:To:CC:Subject: References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=q/GBAJ+cLjJuZewtHrzTJ35jJ6Qvnn+OWLhbuIhZl1KoRhPGFWCYlnqZvhS2KUDa4 8B53w722LPEq6OOEsXWmED1/7tFMqiG4bvpv67uwH3A+s8MKCVh4QJgOE+GQs9ivLx eIcjV09SvNmwUcwD1SqC0R6B0XG2FV7M/5VNR3x0= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 In-Reply-To: <50F0C1A4.40309@cs.ucla.edu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 95.108.130.120 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:156244 Archived-At: On 01/12/2013 05:51 AM, Paul Eggert wrote: > On 01/11/2013 11:51 AM, Stefan Monnier wrote: >> Shouldn't we just enable conservative stack scanning for >> all architectures? > > Yes, we should give it a try. If it doesn't work we can revert. > If it does work, we can simplify Emacs and this will help prevent > future bugs like Bug#13408. Argh, current trunk is broken with !GC_MARK_STACK anyway: 1) I don't know why this isn't in the trunk: http://lists.gnu.org/archive/html/emacs-devel/2011-11/txtjY_VzSBijo.txt 2) My stuff from commit 111073 breaks !GC_MARK_STACK because Lisp_Objects referenced from Lisp_Misc_Save_Value are marked only if GC_MARK_STACK :-(. Dmitry