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#70914: 29.3; Crashes often on Windows Date: Mon, 20 May 2024 21:20:16 +0300 Message-ID: <861q5w9wgv.fsf@gnu.org> References: <86msouxamh.fsf@gnu.org> <86h6f0wsbv.fsf@gnu.org> <86seyjtgvd.fsf@gnu.org> <86ttizjdwm.fsf@gnu.org> <86h6eykiuk.fsf@gnu.org> <86cypmji2l.fsf@gnu.org> <865xvadhsg.fsf@gnu.org> <861q5ycpv1.fsf@gnu.org> <86ed9yb2cg.fsf@gnu.org> <86y185ac0w.fsf@gnu.org> <86bk50a938.fsf@gnu.org> 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="29366"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 70914@debbugs.gnu.org, corwin@bru.st To: Simen =?UTF-8?Q?Endsj=C3=B8?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon May 20 20:21:25 2024 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 1s97dT-0007RQ-KC for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 20 May 2024 20:21:23 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s97dD-0004a4-M8; Mon, 20 May 2024 14:21:07 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s97d6-0004Zd-10 for bug-gnu-emacs@gnu.org; Mon, 20 May 2024 14:21:00 -0400 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1s97d4-0001at-0j for bug-gnu-emacs@gnu.org; Mon, 20 May 2024 14:20:58 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1s97d8-0005Om-Aq for bug-gnu-emacs@gnu.org; Mon, 20 May 2024 14:21:02 -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, 20 May 2024 18:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 70914 X-GNU-PR-Package: emacs Original-Received: via spool by 70914-submit@debbugs.gnu.org id=B70914.171622925120735 (code B ref 70914); Mon, 20 May 2024 18:21:02 +0000 Original-Received: (at 70914) by debbugs.gnu.org; 20 May 2024 18:20:51 +0000 Original-Received: from localhost ([127.0.0.1]:44052 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1s97cw-0005ON-HT for submit@debbugs.gnu.org; Mon, 20 May 2024 14:20:50 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:39688) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1s97cr-0005OH-Q7 for 70914@debbugs.gnu.org; Mon, 20 May 2024 14:20:49 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s97cg-0001Yo-Pv; Mon, 20 May 2024 14:20:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=Zb4rNbEkzxZLJL4R+UonudS4KxMlZ2Ru41zQ04cMxS8=; b=FkYx5kGu+fWDAZY5A07b 33NkRmKxNwvc3ENg+F0uqQpS3BC6sdT52cxJX8oR+gazbKGT2P2HUe8Jkmz4K0nnWG97MwdlzDpEN Tw8EpjDYSLJDHcLXarrVUSlmWf7mht0tQtz15n6OnAJXPnpRAQ2W5fOZUuB2d7aEAXbV5TFILkfID 39CUwt9Kz8mJWj9BAjCsQwa0Ma9UZnr64ZfnMTj0odHJoskt3X62JJNGUa2w0TegVMRPAdi5IGkOB o+o0RQ/aFTpLcWYBUh/NtkAPBKtpjx1zIau59j9QTuL/UqMeUMnhqfaXadQmyPMjeRKzkYIdtFx53 PLnnNQpQ8mmNJg==; In-Reply-To: (message from Simen =?UTF-8?Q?Endsj=C3=B8?= on Mon, 20 May 2024 19:54:38 +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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:285491 Archived-At: > From: Simen Endsjø > Date: Mon, 20 May 2024 19:54:38 +0200 > Cc: 70914@debbugs.gnu.org, corwin@bru.st > > > Please try this with a healthy Emacs process before you do it after > > the crash, to make sure this procedure works. Here's my attempt to > > validate this technique: > > Looks like I needed a binary with debugging symbols, so I used my previous > build. It's as good as any other. But looks like there are two stack frames with > zero pointers, so the technique doesn't work? > > Thread 1 received signal SIGSEGV, Segmentation fault. > 0x0000000000000000 in ?? () > (gdb) thread 1 > [Switching to thread 1 (Thread 19884.0x7bf8)] > #0 0x0000000000000000 in ?? () > (gdb) p/x *(uintptr_t *)$sp > $1 = 0x0 > (gdb) list *$ > (gdb) bt > #0 0x0000000000000000 in ?? () > #1 0x0000000000000000 in ?? () > (gdb) There are two zeros on the stack. Bummer. What does this produce: (gdb) p/x *(uintptr_t *)($sp + 8) If the value is non-zero, try listing it: (gdb) list *$ If the above yields zero, try $sp+16, $sp+24, etc., until you get a non-zero value.