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: [Emacs-diffs] trunk r116836: Avoid GC crashes. Date: Thu, 27 Mar 2014 19:47:28 +0200 Message-ID: <83ha6jy1n3.fsf@gnu.org> References: <532CE5CE.8090607@dancol.org> <2641004.l0IPvBSXvE@descartes> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE X-Trace: ger.gmane.org 1395942456 5363 80.91.229.3 (27 Mar 2014 17:47:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 27 Mar 2014 17:47:36 +0000 (UTC) Cc: lekktu@gmail.com, dancol@dancol.org, rms@gnu.org, emacs-devel@gnu.org To: =?utf-8?Q?R=C3=BCdiger?= Sonderfeld Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Mar 27 18:47:45 2014 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 1WTEP2-000327-SR for ged-emacs-devel@m.gmane.org; Thu, 27 Mar 2014 18:47:44 +0100 Original-Received: from localhost ([::1]:55217 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WTEP2-0000Y0-IS for ged-emacs-devel@m.gmane.org; Thu, 27 Mar 2014 13:47:44 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:43273) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WTEOu-0000Xs-6J for emacs-devel@gnu.org; Thu, 27 Mar 2014 13:47:41 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WTEOp-00043n-97 for emacs-devel@gnu.org; Thu, 27 Mar 2014 13:47:36 -0400 Original-Received: from mtaout27.012.net.il ([80.179.55.183]:50562) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WTEOp-00043c-0v; Thu, 27 Mar 2014 13:47:31 -0400 Original-Received: from conversion-daemon.mtaout27.012.net.il by mtaout27.012.net.il (HyperSendmail v2007.08) id <0N3300F00VMD3X00@mtaout27.012.net.il>; Thu, 27 Mar 2014 19:44:37 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout27.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N3300D2LVYDJL30@mtaout27.012.net.il>; Thu, 27 Mar 2014 19:44:37 +0200 (IST) In-reply-to: <2641004.l0IPvBSXvE@descartes> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.183 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:171043 Archived-At: > From: R=C3=BCdiger Sonderfeld > Date: Wed, 26 Mar 2014 15:42:03 +0100 > Cc: lekktu@gmail.com, Daniel Colascione >=20 > On Saturday 22 March 2014 19:57:02 Richard Stallman wrote: > > Thanks. Am I missing something, or is there still no reliable= repro? I > > feel like gdb's reverse debugging support would be helpful he= re. > >=20 > > I don't know how much time passes between the vector gets freed > > and when the symbol gets marked. I suspect it is the time > > between one GC and the next, which would be millions of instructi= ons. > > Can reverse execution handle that? >=20 > Maybe Mozilla's new rr project could help here >=20 > * http://robert.ocallahan.org/2014/03/introducing-rr.html > * http://rr-project.org/ >=20 > It records the execution and allows replays It's x86 specific, so will most probably not work on Richard's machine.