From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#36609: 27.0.50; Possible race-condition in threading implementation Date: Thu, 10 Jun 2021 18:39:50 +0300 Message-ID: <83mtrxbuex.fsf@gnu.org> References: <87muhks3b5.fsf@hochschule-trier.de> <87fsxv8182.fsf@dick> <83wnr7gdd8.fsf@gnu.org> <875yyqg66k.fsf@dick> <83k0n6hjym.fsf@gnu.org> <87wnr2lnsj.fsf@dick> <83h7i6cj3z.fsf@gnu.org> <87bl8e2aya.fsf@dick> <8335tpdcq9.fsf@gnu.org> <8735tpivfp.fsf@igel.home> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1327"; mail-complaints-to="usenet@ciao.gmane.io" Cc: dick.r.chiang@gmail.com, 36609@debbugs.gnu.org To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jun 10 17:41:07 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lrMnr-0000A7-D9 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 10 Jun 2021 17:41:07 +0200 Original-Received: from localhost ([::1]:40290 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lrMnq-0005Ma-AK for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 10 Jun 2021 11:41:06 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57876) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrMnm-0005MM-7N for bug-gnu-emacs@gnu.org; Thu, 10 Jun 2021 11:41:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:54300) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lrMnl-0002Mh-Ve for bug-gnu-emacs@gnu.org; Thu, 10 Jun 2021 11:41:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lrMnl-000439-UJ for bug-gnu-emacs@gnu.org; Thu, 10 Jun 2021 11:41:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 10 Jun 2021 15:41:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36609 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: fixed Original-Received: via spool by 36609-submit@debbugs.gnu.org id=B36609.162333960915493 (code B ref 36609); Thu, 10 Jun 2021 15:41:01 +0000 Original-Received: (at 36609) by debbugs.gnu.org; 10 Jun 2021 15:40:09 +0000 Original-Received: from localhost ([127.0.0.1]:37613 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lrMmv-00041p-2E for submit@debbugs.gnu.org; Thu, 10 Jun 2021 11:40:09 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:59784) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lrMmt-00041b-Kq for 36609@debbugs.gnu.org; Thu, 10 Jun 2021 11:40:08 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:55382) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lrMmn-0001ly-Pi; Thu, 10 Jun 2021 11:40:01 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1281 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrMmn-0007gm-9Q; Thu, 10 Jun 2021 11:40:01 -0400 In-Reply-To: <8735tpivfp.fsf@igel.home> (message from Andreas Schwab on Thu, 10 Jun 2021 17:35:54 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:208330 Archived-At: > From: Andreas Schwab > Cc: dick.r.chiang@gmail.com, 36609@debbugs.gnu.org > Date: Thu, 10 Jun 2021 17:35:54 +0200 > > On Jun 10 2021, Eli Zaretskii wrote: > > > The idea is that a variable that is modified in a single machine > > instruction will always have the value assigned by the last thread > > which set that. > > You cannot have that without explicit atomic operations. We can do that if it turns out to be an issue.