From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Revisit patch for Bug#11935? Date: Mon, 5 Dec 2016 09:08:06 -0800 Organization: UCLA Computer Science Department Message-ID: <4dc47b62-7cfb-09c9-e036-e11c857c76f3@cs.ucla.edu> References: <661e36f7-2a24-d7f3-f7d2-f1ef98216f5b@cs.ucla.edu> <8337i2l6ns.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1480958023 26750 195.159.176.226 (5 Dec 2016 17:13:43 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 5 Dec 2016 17:13:43 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 Cc: ravi@ravidesai.com, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Dec 05 18:13:37 2016 Return-path: Envelope-to: ged-emacs-devel@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 1cDwpd-0006GH-G3 for ged-emacs-devel@m.gmane.org; Mon, 05 Dec 2016 18:13:37 +0100 Original-Received: from localhost ([::1]:43416 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDwph-0004Mr-Gz for ged-emacs-devel@m.gmane.org; Mon, 05 Dec 2016 12:13:41 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53786) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDwkU-0000v6-Ai for emacs-devel@gnu.org; Mon, 05 Dec 2016 12:08:22 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cDwkQ-0007KX-FI for emacs-devel@gnu.org; Mon, 05 Dec 2016 12:08:18 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:58904) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cDwkK-0007Hc-Tp; Mon, 05 Dec 2016 12:08:09 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id A3C08160161; Mon, 5 Dec 2016 09:08:07 -0800 (PST) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id ehrfT0QGPkAm; Mon, 5 Dec 2016 09:08:06 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id B655C160168; Mon, 5 Dec 2016 09:08:06 -0800 (PST) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Sok3QPUCX8yh; Mon, 5 Dec 2016 09:08:06 -0800 (PST) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 9D0F1160167; Mon, 5 Dec 2016 09:08:06 -0800 (PST) In-Reply-To: <8337i2l6ns.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:210074 Archived-At: On 12/05/2016 07:47 AM, Eli Zaretskii wrote: > -Og still makes debugging more > difficult compared to -O0. For example, many values appear as > "optimized out" in the backtraces, which sometimes requires me to go > up the stack very far to find the value. If those "optimized out"s are an obstacle we should report them to the GCC developers. I debugged Emacs with -Og, found an instance of "optimized out", turned it into a small test case, and filed a bug report with the GCC developers here: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78685 Please feel free to add to it, or to report more bugs in this area.