From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Making Emacs Lisp easier to debug Date: Sat, 11 Nov 2023 11:04:01 +0000 Message-ID: References: <838r74ye77.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26188"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 11 12:04:49 2023 Return-path: Envelope-to: ged-emacs-devel@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 1r1lnE-0006Tm-Ek for ged-emacs-devel@m.gmane-mx.org; Sat, 11 Nov 2023 12:04:48 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r1lmc-0008IJ-LH; Sat, 11 Nov 2023 06:04:10 -0500 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 1r1lmZ-0008IB-Ix for emacs-devel@gnu.org; Sat, 11 Nov 2023 06:04:07 -0500 Original-Received: from mail.muc.de ([193.149.48.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r1lmX-0003OU-Kg for emacs-devel@gnu.org; Sat, 11 Nov 2023 06:04:07 -0500 Original-Received: (qmail 89532 invoked by uid 3782); 11 Nov 2023 12:04:02 +0100 Original-Received: from acm.muc.de (p4fe151aa.dip0.t-ipconnect.de [79.225.81.170]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Sat, 11 Nov 2023 12:04:02 +0100 Original-Received: (qmail 5018 invoked by uid 1000); 11 Nov 2023 11:04:01 -0000 Content-Disposition: inline In-Reply-To: <838r74ye77.fsf@gnu.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:312538 Archived-At: Hello, Eli. On Sat, Nov 11, 2023 at 08:52:12 +0200, Eli Zaretskii wrote: > > Date: Fri, 10 Nov 2023 20:56:54 +0000 > > From: Alan Mackenzie > > (ii) Edebugging font locking code. It would be nice to be able to debug > > font locking code which is being called from redisplay, as well as other > > hooks which are also called from redisplay. At the moment this isn't > > possible. To make it possible would require redisplay to become > > reentrant, so that a frame or window in the inner redisplay call > > could be where debugging of the outer redisplay call happens. I don't > > know how practicable it would be to enhance redisplay for this (it is > > certainly possible). Has anybody ever looked into this before? > Yes, see jit-lock-debug-mode. (It's described in the ELisp manual.) :-) I really meant has anybody looked into making redisplay reentrant. As for jit-lock-debug-mode, it doesn't work in my setup. It just disables font-lock totally. I suspect its timer isn't triggering for some reason. I haven't actually tried it yet in emacs -Q. -- Alan Mackenzie (Nuremberg, Germany).