From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.bugs Subject: bug#15794: Core dump after SIGTERM during GC marking Date: Sun, 03 Nov 2013 23:22:31 +0100 Message-ID: <8738nd2kig.fsf@igel.home> References: <87k3gq2dpr.fsf@igel.home> <83d2mh9ydm.fsf@gnu.org> <877gcp2wiz.fsf@igel.home> <83a9hl9sau.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1383517398 14954 80.91.229.3 (3 Nov 2013 22:23:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 3 Nov 2013 22:23:18 +0000 (UTC) Cc: 15794@debbugs.gnu.org, gundaetiapo@gmail.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Nov 03 23:23:21 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1Vd64m-0000Ve-PO for geb-bug-gnu-emacs@m.gmane.org; Sun, 03 Nov 2013 23:23:20 +0100 Original-Received: from localhost ([::1]:47016 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vd64m-0005OK-A9 for geb-bug-gnu-emacs@m.gmane.org; Sun, 03 Nov 2013 17:23:20 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38663) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vd64d-0005N1-TM for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2013 17:23:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Vd64W-0007XL-7x for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2013 17:23:11 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47405) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vd64W-0007XH-4L for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2013 17:23:04 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Vd64V-0002vF-0R for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2013 17:23:03 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Andreas Schwab Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 03 Nov 2013 22:23:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15794 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 15794-submit@debbugs.gnu.org id=B15794.138351735811179 (code B ref 15794); Sun, 03 Nov 2013 22:23:02 +0000 Original-Received: (at 15794) by debbugs.gnu.org; 3 Nov 2013 22:22:38 +0000 Original-Received: from localhost ([127.0.0.1]:33187 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vd646-0002uE-GN for submit@debbugs.gnu.org; Sun, 03 Nov 2013 17:22:38 -0500 Original-Received: from mail-out.m-online.net ([212.18.0.9]:60027) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vd642-0002td-FN for 15794@debbugs.gnu.org; Sun, 03 Nov 2013 17:22:35 -0500 Original-Received: from frontend1.mail.m-online.net (unknown [192.168.8.180]) by mail-out.m-online.net (Postfix) with ESMTP id 3dCWpx0zpZz4KK2X; Sun, 3 Nov 2013 23:22:32 +0100 (CET) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.68]) by mail.m-online.net (Postfix) with ESMTP id 3dCWpw1zZDzbbfx; Sun, 3 Nov 2013 23:22:32 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.180]) by localhost (dynscan1.mail.m-online.net [192.168.6.68]) (amavisd-new, port 10024) with ESMTP id DuyL80mY-ddW; Sun, 3 Nov 2013 23:22:31 +0100 (CET) X-Auth-Info: H1uBKRlVkJpHeBHxoW2kFc6aRfB4isvDzfi56y6ldFU= Original-Received: from igel.home (ppp-88-217-122-174.dynamic.mnet-online.de [88.217.122.174]) by mail.mnet-online.de (Postfix) with ESMTPA; Sun, 3 Nov 2013 23:22:31 +0100 (CET) Original-Received: by igel.home (Postfix, from userid 1000) id 159C82C0371; Sun, 3 Nov 2013 23:22:31 +0100 (CET) X-Yow: Is something VIOLENT going to happen to a GARBAGE CAN? In-Reply-To: <83a9hl9sau.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 03 Nov 2013 21:52:25 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x 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:79937 Archived-At: Eli Zaretskii writes: >> From: Andreas Schwab >> Cc: 15794@debbugs.gnu.org, gundaetiapo@gmail.com >> Date: Sun, 03 Nov 2013 19:03:00 +0100 >> >> >> The signal was received during GC. Shouldn't its handling be postponed >> >> then? >> > >> > Maybe. But then it would be impossible to kill Emacs during a runaway >> > GC in a way that would cause Emacs to auto-save, wouldn't it? >> >> Even auto-save is a no-no in a signal handler. > > I don't see why. Auto-save takes care to do only predictable things. A lot of things that are a no-no in a signal handler, like calling auto-save-hook. > Not to mention that Emacs has been doing this for many years, and that > it's a valuable feature that it does. That's the nice thing about undefined behaviour, it can take a long time until you see its ugly head. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."