From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Contributing LLVM.org patches to gud.el Date: Wed, 11 Feb 2015 17:42:14 +0200 Message-ID: <83fvac78vd.fsf@gnu.org> References: <87mw4rxkzv.fsf@fencepost.gnu.org> <87y4oavxcy.fsf@fencepost.gnu.org> <87d25juy8m.fsf@fencepost.gnu.org> <83iofa8lu2.fsf@gnu.org> <87wq3qrvjz.fsf@fencepost.gnu.org> <83386d92ox.fsf@gnu.org> <874mqtsoqy.fsf@fencepost.gnu.org> <83y4o57lfj.fsf@gnu.org> <87oap1nmef.fsf@uwakimon.sk.tsukuba.ac.jp> <54DAD0C3.9040103@dancol.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1423669365 32609 80.91.229.3 (11 Feb 2015 15:42:45 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 11 Feb 2015 15:42:45 +0000 (UTC) Cc: stephen@xemacs.org, emacs-devel@gnu.org To: Daniel Colascione Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Feb 11 16:42:34 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YLZQs-0003Ph-CY for ged-emacs-devel@m.gmane.org; Wed, 11 Feb 2015 16:42:30 +0100 Original-Received: from localhost ([::1]:45586 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YLZQr-0007Qu-Pd for ged-emacs-devel@m.gmane.org; Wed, 11 Feb 2015 10:42:29 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47889) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YLZQp-0007Qp-9y for emacs-devel@gnu.org; Wed, 11 Feb 2015 10:42:28 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YLZQl-0003oy-6l for emacs-devel@gnu.org; Wed, 11 Feb 2015 10:42:27 -0500 Original-Received: from mtaout25.012.net.il ([80.179.55.181]:37664) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YLZQk-0003ns-Us for emacs-devel@gnu.org; Wed, 11 Feb 2015 10:42:23 -0500 Original-Received: from conversion-daemon.mtaout25.012.net.il by mtaout25.012.net.il (HyperSendmail v2007.08) id <0NJM006005QCCN00@mtaout25.012.net.il> for emacs-devel@gnu.org; Wed, 11 Feb 2015 17:37:12 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout25.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NJM00MU3620OT90@mtaout25.012.net.il>; Wed, 11 Feb 2015 17:37:12 +0200 (IST) In-reply-to: <54DAD0C3.9040103@dancol.org> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.181 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:182892 Archived-At: > Date: Tue, 10 Feb 2015 19:47:15 -0800 > From: Daniel Colascione > CC: emacs-devel@gnu.org > > What exactly are the DWARF deficiencies that prevent a debugger from > unwinding caller-saved registers to their original values? The > specification seems more than powerful enough for the task. In a recent enough GDB, those cases where you see are not about caller-saved registers. They are about variables whose location at the current value of PC is not recorded in DWARF info in a way that a debugger can use to glean their values. You can read more about this in the discussion which started here: http://cygwin.com/ml/gdb/2014-09/msg00068.html