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#50319: 27.2; crash Date: Wed, 01 Sep 2021 17:04:25 +0300 Message-ID: <837dg0qtna.fsf@gnu.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31622"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 50319@debbugs.gnu.org To: Devon Sean McCullough Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Sep 01 16:05:30 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 1mLQrp-0007xP-MO for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 01 Sep 2021 16:05:29 +0200 Original-Received: from localhost ([::1]:59818 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mLQro-0007Ar-Ad for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 01 Sep 2021 10:05:28 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59290) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mLQrO-0007Ae-5K for bug-gnu-emacs@gnu.org; Wed, 01 Sep 2021 10:05:04 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:55413) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mLQrN-0008Sr-Pe for bug-gnu-emacs@gnu.org; Wed, 01 Sep 2021 10:05:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mLQrN-0001tI-Ko for bug-gnu-emacs@gnu.org; Wed, 01 Sep 2021 10:05:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 01 Sep 2021 14:05:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 50319 X-GNU-PR-Package: emacs Original-Received: via spool by 50319-submit@debbugs.gnu.org id=B50319.16305050877244 (code B ref 50319); Wed, 01 Sep 2021 14:05:01 +0000 Original-Received: (at 50319) by debbugs.gnu.org; 1 Sep 2021 14:04:47 +0000 Original-Received: from localhost ([127.0.0.1]:38726 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mLQr5-0001si-W1 for submit@debbugs.gnu.org; Wed, 01 Sep 2021 10:04:47 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:43058) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mLQqw-0001sL-9b for 50319@debbugs.gnu.org; Wed, 01 Sep 2021 10:04:43 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50504) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mLQqq-0007tn-QP; Wed, 01 Sep 2021 10:04:28 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4412 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 1mLQqq-0002BE-D9; Wed, 01 Sep 2021 10:04:28 -0400 In-Reply-To: (message from Devon Sean McCullough on Wed, 1 Sep 2021 09:30:57 -0400) 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:213192 Archived-At: > From: Devon Sean McCullough > Date: Wed, 1 Sep 2021 09:30:57 -0400 > > Launch Emacs, attach a debugger, use it routinely for many weeks, > switching between various apps, until it dereferences a bad pointer > upon switching from some other app: > > (lldb) process attach --pid 24105 > ⋮ > Executable module set to "/Applications/Emacs.app/Contents/MacOS/Emacs-x86_64-10_14". > Architecture set to: x86_64h-apple-macosx-. > ⋮ > (lldb) Process 24105 stopped > * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x172505fec) > frame #0: 0x000000010cdcb104 Emacs-x86_64-10_14`redisplay_window + 4244 > Emacs-x86_64-10_14`redisplay_window: > -> 0x10cdcb104 <+4244>: movq -0x14(%rbx), %rcx > 0x10cdcb108 <+4248>: addq $-0x100, %rbx > 0x10cdcb10f <+4255>: testl $0x100000, %ecx ; imm = 0x100000 > 0x10cdcb115 <+4261>: je 0x10cdcb0a0 ; <+4144> > Target 0: (Emacs-x86_64-10_14) stopped. > (lldb) bt all > * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x172505fec) > * frame #0: 0x000000010cdcb104 Emacs-x86_64-10_14`redisplay_window + 4244 Can you show where is this place in xdisp.c? I'm afraid I cannot figure that out from the disassembly alone. Also, what did you do when it segfaulted? just clicked on an Emacs frame with a mouse? The backtrace doesn't look like a frame redraw, it looks like a routine redisplay when Emacs becomes idle. Thanks.