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 18:00:20 +0200 Message-ID: <83k2np72sr.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> <83d1th8j08.fsf@gnu.org> <568A8F87.8080007@dancol.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1451923229 31090 80.91.229.3 (4 Jan 2016 16:00:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 4 Jan 2016 16:00:29 +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 17:00:25 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 1aG7YW-0008Ro-2t for ged-emacs-devel@m.gmane.org; Mon, 04 Jan 2016 17:00:24 +0100 Original-Received: from localhost ([::1]:45601 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG7YV-0007T5-LW for ged-emacs-devel@m.gmane.org; Mon, 04 Jan 2016 11:00:23 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60460) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG7YS-0007R8-Im for Emacs-devel@gnu.org; Mon, 04 Jan 2016 11:00:21 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aG7YP-0001bx-Bj for Emacs-devel@gnu.org; Mon, 04 Jan 2016 11:00:20 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:35346) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aG7YP-0001bt-8W; Mon, 04 Jan 2016 11:00:17 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:3034 helo=HOME-C4E4A596F7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1aG7YO-0004zX-I6; Mon, 04 Jan 2016 11:00:16 -0500 In-reply-to: <568A8F87.8080007@dancol.org> (message from Daniel Colascione on Mon, 4 Jan 2016 07:28:07 -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:197603 Archived-At: > Cc: eggert@cs.ucla.edu, Emacs-devel@gnu.org > From: Daniel Colascione > Date: Mon, 4 Jan 2016 07:28:07 -0800 > > >> 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. > > That's why we have the alternate signal stack. Which is also quite small, and from which you cannot run Lisp safely (AFAIU).