From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jorgen Schaefer Newsgroups: gmane.emacs.bugs Subject: bug#17561: Emacs can forget processes Date: Thu, 29 May 2014 21:06:59 +0200 Message-ID: <20140529210659.793b3b37@forcix.jorgenschaefer.de> References: <537F773C.8060202@cs.ucla.edu> <20140523184419.70fe136d@forcix.jorgenschaefer.de> <538124C0.8080107@cs.ucla.edu> <20140525095735.6cfac9af@forcix.jorgenschaefer.de> <53837516.3070508@cs.ucla.edu> <20140526204952.1dba664e@forcix.jorgenschaefer.de> <5383D535.2000407@cs.ucla.edu> <20140527202756.7bade0ce@forcix.jorgenschaefer.de> <538506AB.3090201@cs.ucla.edu> <20140528001641.190b7ada@forcix.jorgenschaefer.de> <5385322D.7030406@cs.ucla.edu> <20140528225346.227e166d@forcix.jorgenschaefer.de> <53866A97.9030404@cs.ucla.edu> <20140529013505.65346321@forcix.jorgenschaefer.de> <5386B4E4.4070100@cs.ucla.edu> <20140529133927.3570a795@forcix.jorgenschaefer.de> <53874D9F.5030107@cs.ucla.edu> <87iooo4njq.fsf@igel.home> <538751A7.1020201@cs.ucla.edu> <20140529190326.177fb39b@forcix.jorgenschaefer.de> <87a9a04ghj.fsf@igel.home> <20140529202300.78dd9e2e@forcix.jorgenschaefer.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1401390506 20720 80.91.229.3 (29 May 2014 19:08:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 29 May 2014 19:08:26 +0000 (UTC) Cc: Paul Eggert , Andreas Schwab To: 17561@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu May 29 21:08:19 2014 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 1Wq5gY-0005bb-SN for geb-bug-gnu-emacs@m.gmane.org; Thu, 29 May 2014 21:08:18 +0200 Original-Received: from localhost ([::1]:49803 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wq5gY-0001in-8T for geb-bug-gnu-emacs@m.gmane.org; Thu, 29 May 2014 15:08:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:36526) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wq5gP-0001ca-PJ for bug-gnu-emacs@gnu.org; Thu, 29 May 2014 15:08:16 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wq5gI-00021i-W7 for bug-gnu-emacs@gnu.org; Thu, 29 May 2014 15:08:09 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:37552) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wq5gI-00021e-TM for bug-gnu-emacs@gnu.org; Thu, 29 May 2014 15:08:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Wq5gI-0006e8-MD for bug-gnu-emacs@gnu.org; Thu, 29 May 2014 15:08:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Jorgen Schaefer Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 29 May 2014 19:08:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 17561 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 17561-submit@debbugs.gnu.org id=B17561.140139042625420 (code B ref 17561); Thu, 29 May 2014 19:08:02 +0000 Original-Received: (at 17561) by debbugs.gnu.org; 29 May 2014 19:07:06 +0000 Original-Received: from localhost ([127.0.0.1]:36425 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wq5fO-0006bw-5g for submit@debbugs.gnu.org; Thu, 29 May 2014 15:07:06 -0400 Original-Received: from loki.jorgenschaefer.de ([87.230.15.51]:59639) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wq5fM-0006bk-2b for 17561@debbugs.gnu.org; Thu, 29 May 2014 15:07:04 -0400 Original-Received: by loki.jorgenschaefer.de (Postfix, from userid 998) id 4429D2030D8; Thu, 29 May 2014 21:07:02 +0200 (CEST) Original-Received: from forcix.jorgenschaefer.de (port-13271.pppoe.wtnet.de [84.46.52.11]) by loki.jorgenschaefer.de (Postfix) with ESMTPSA id D34192030AF; Thu, 29 May 2014 21:07:00 +0200 (CEST) In-Reply-To: <20140529202300.78dd9e2e@forcix.jorgenschaefer.de> X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.23; i486-pc-linux-gnu) 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:89717 Archived-At: On Thu, 29 May 2014 20:23:00 +0200 Jorgen Schaefer wrote: > See the attached trace. I spared you the few megs of read/select loop > this time. > > I don't understand it, though. > > Line 4685 has a SIGCHLD. The next rt_sigprocmask that mentions CHLD is > in line 4726, where SIGCHLD is in the oldset. It wasn't at 4714/4715. > Huh? How did it get there? I do not see the rt_sigreturn corresponding to the SIGINT in line 4724. Which would mean that the signals blocked in a signal handler (which I guess includes SIGCHLD, according to the SIG_BLOCK in line 4726) won't get restored. I see the same sequence a few times in the full (21M) strace output: SIGINT, then SIG_UNBLOCK for [INT], SIG_BLOCK for [WINCH IO] with oldmask [QUIT ALRM CHILD PROF WINCH IO], then two calls to write(), and then SIG_UNBLOCK with [WINCH IO], then a SIGIO, but no rt_sigreturn for the SIGINT.