From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#28630: 27.0.50; C-g while a non-main thread is sitting crashes Emacs Date: Mon, 09 Oct 2017 14:01:05 +0300 Message-ID: <834lr8shzi.fsf@gnu.org> References: <87efqri8x9.fsf@gmail.com> <874lrjy2rz.fsf@gmail.com> <831smm52v4.fsf@gnu.org> <87d166rb6n.fsf@gmail.com> <83o9pq3eix.fsf@gnu.org> <838tgt352c.fsf@gnu.org> <83fuazz7ja.fsf@gnu.org> <83a817z5sd.fsf@gnu.org> <834lrfz2pk.fsf@gnu.org> <83infuxdk4.fsf@gnu.org> <838tgksol2.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1507546948 6796 195.159.176.226 (9 Oct 2017 11:02:28 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 9 Oct 2017 11:02:28 +0000 (UTC) Cc: 28630@debbugs.gnu.org, tom@tromey.com, agrambot@gmail.com To: mituharu@math.s.chiba-u.ac.jp Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 09 13:02:19 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e1VpA-0008FU-53 for geb-bug-gnu-emacs@m.gmane.org; Mon, 09 Oct 2017 13:02:16 +0200 Original-Received: from localhost ([::1]:57134 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e1VpC-0003an-F1 for geb-bug-gnu-emacs@m.gmane.org; Mon, 09 Oct 2017 07:02:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52872) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e1Vp2-0003af-3H for bug-gnu-emacs@gnu.org; Mon, 09 Oct 2017 07:02:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e1Vow-0003Vi-Hh for bug-gnu-emacs@gnu.org; Mon, 09 Oct 2017 07:02:08 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:48503) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e1Vow-0003Vc-EU for bug-gnu-emacs@gnu.org; Mon, 09 Oct 2017 07:02:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1e1Vow-0003VS-5T for bug-gnu-emacs@gnu.org; Mon, 09 Oct 2017 07:02:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 09 Oct 2017 11:02:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28630 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 28630-submit@debbugs.gnu.org id=B28630.150754691213458 (code B ref 28630); Mon, 09 Oct 2017 11:02:02 +0000 Original-Received: (at 28630) by debbugs.gnu.org; 9 Oct 2017 11:01:52 +0000 Original-Received: from localhost ([127.0.0.1]:57184 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e1Vom-0003V0-Aa for submit@debbugs.gnu.org; Mon, 09 Oct 2017 07:01:52 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:33586) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e1Vok-0003Uo-QH for 28630@debbugs.gnu.org; Mon, 09 Oct 2017 07:01:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e1Vob-0003Og-Bq for 28630@debbugs.gnu.org; Mon, 09 Oct 2017 07:01:45 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:55287) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e1VoE-0003Et-5b; Mon, 09 Oct 2017 07:01:18 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:4872 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1e1VoC-0002PG-W9; Mon, 09 Oct 2017 07:01:17 -0400 In-reply-to: (mituharu@math.s.chiba-u.ac.jp) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:138110 Archived-At: > Date: Mon, 9 Oct 2017 19:34:28 +0900 > From: mituharu@math.s.chiba-u.ac.jp > Cc: agrambot@gmail.com, > 28630@debbugs.gnu.org, > tom@tromey.com > > In both Examples, the main thread is not blocking at pselect, but > thread-join (sys_cond_wait internally), i.e., without monitoring > the keyboard descriptor. The secondary one is blocking at pselect > in sit-for (Example 1) or sleep-for (Example 2). So "none of > other threads is monitoring the keyboard input channel" part > becomes true for the secondary thread after returning from > pselect. OK, with thread-join this is so. Sorry for missing that part. In any case, on TTY frames C-g triggers SIGINT, and we always deliver signals to the main thread. If we want to be able to handle keyboard input in non-main threads, we should change how signals are handled in Emacs.