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: Dynamic modules: MODULE_HANDLE_SIGNALS etc. Date: Mon, 04 Jan 2016 17:24:55 +0200 Message-ID: <83d1th8j08.fsf@gnu.org> References: <83mvu1x6t3.fsf@gnu.org> <56772054.8010401@cs.ucla.edu> <83zix4scgf.fsf@gnu.org> <5677DBC9.6030307@cs.ucla.edu> <83io3rst2r.fsf@gnu.org> <567841A6.4090408@cs.ucla.edu> <567844B9.2050308@dancol.org> <5678CD07.8080209@cs.ucla.edu> <5678D3AF.7030101@dancol.org> <5678D620.6070000@cs.ucla.edu> <83mvt2qxm1.fsf@gnu.org> <56797CD9.8010706@cs.ucla.edu> <8337uuqsux.fsf@gnu.org> <5679DC83.70405@cs.ucla.edu> <83oadhp2mj.fsf@gnu.org> <567AD556.6020202@cs.ucla.edu> <567AD766.3060608@dancol.org> <567B5DAB.2000900@cs.ucla.edu> <83fuyromig.fsf@gnu.org> <567C25B1.3020101@dancol.org> <56892FD6.8040708@dancol.org> <56894CE7.7090301@cs.ucla.edu> <568950C5.2030306@dancol.org> <56896359.4020309@cs.ucla.edu> <568966D4.5080707@dancol.org> <56898C6F.4010303@cs.ucla.edu> <56898EBD.2000000@dancol.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1451921215 29651 80.91.229.3 (4 Jan 2016 15:26:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 4 Jan 2016 15:26:55 +0000 (UTC) Cc: eggert@cs.ucla.edu, Emacs-devel@gnu.org To: Daniel Colascione Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Jan 04 16:26:55 2016 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 1aG724-0001ED-G5 for ged-emacs-devel@m.gmane.org; Mon, 04 Jan 2016 16:26:52 +0100 Original-Received: from localhost ([::1]:45387 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG723-0008Q4-GZ for ged-emacs-devel@m.gmane.org; Mon, 04 Jan 2016 10:26:51 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45190) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG70F-0005nP-RM for Emacs-devel@gnu.org; Mon, 04 Jan 2016 10:25:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aG70A-0007M0-Ro for Emacs-devel@gnu.org; Mon, 04 Jan 2016 10:24:59 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:34583) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG70A-0007Lw-KB; Mon, 04 Jan 2016 10:24:54 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3001 helo=HOME-C4E4A596F7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1aG707-0001ds-3i; Mon, 04 Jan 2016 10:24:54 -0500 In-reply-to: <56898EBD.2000000@dancol.org> (message from Daniel Colascione on Sun, 3 Jan 2016 13:12:29 -0800) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e 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:197577 Archived-At: > From: Daniel Colascione > Date: Sun, 3 Jan 2016 13:12:29 -0800 > > > I think something along that lines would suffice, yes. Admittedly I > > didn't quite follow what you wrote (perhaps some text got elided?). But > > the main point, as I understand it, is that we needn't worry about > > having a stack-overflow check inside the stack-overflow handler, because > > we can insist that the stack-overflow handler be tightly-enough > > controlled so that it won't recurse indefinitely. > > Yes: do as little as possible in the segfault handler and signal an > error the normal way at the next safe opportunity, if one arises before > we fully exhaust the stack. You cannot do that when the stack is exhausted. You will almost certainly crash if you try.