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.devel Subject: Re: Making Emacs Lisp easier to debug Date: Sat, 11 Nov 2023 08:52:12 +0200 Message-ID: <838r74ye77.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="19710"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Nov 11 07:53:08 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 1r1hrf-0004vg-R7 for ged-emacs-devel@m.gmane-mx.org; Sat, 11 Nov 2023 07:53:07 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r1hqw-0006kJ-TF; Sat, 11 Nov 2023 01:52:24 -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 1r1hqt-0006jt-Jp for emacs-devel@gnu.org; Sat, 11 Nov 2023 01:52:19 -0500 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 1r1hqs-0005Ad-NQ; Sat, 11 Nov 2023 01:52:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=jxD9su4cMM+10WVYaQY85qY4y84la9/hH0kuZTEPGFw=; b=OxUJBNdlvmT1 mYbi8nPSBewaQEPr2D33Jt96GV2lN8PYgmpgQ8cG+oGu7EzSpn3G8VaSs48N/eqlvuIVnCk9lsCad 54nk9olV1bleytyPAoFUnXJ2WwbPhXYXFBd2diKB89Kihfh5rIaJr726Wh3MJPOnHfvW53TAghepM 2v8Y5GF/zZdhqwxPOQ7vwFmZP54NJqwu9aqSf702vQFpTeoO/iZKD8ivuDpUK61fF6MCuFUbgQkd5 VMb1qeHca9VTgjmWVs1Poyru7TMVbgxhP7u0KRz55Mz4V8R1qHb3/Lrv+ifrTSugbiJOmKP7K/sok AkK2fOAQZq38T5rHh7nnOA==; In-Reply-To: (message from Alan Mackenzie on Fri, 10 Nov 2023 20:56:54 +0000) 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:312530 Archived-At: > 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.)