From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29507 invoked by alias); 16 Mar 2006 23:23:16 -0000 Received: (qmail 29495 invoked by uid 22791); 16 Mar 2006 23:23:15 -0000 X-Spam-Check-By: sourceware.org Received: from adsl-67-116-42-147.dsl.sntc01.pacbell.net (HELO avtrex.com) (67.116.42.147) by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 16 Mar 2006 23:23:12 +0000 Received: from [192.168.7.26] ([192.168.7.26]) by avtrex.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 16 Mar 2006 15:23:09 -0800 Message-ID: <4419F35D.6000907@avtrex.com> Date: Thu, 16 Mar 2006 23:25:00 -0000 From: David Daney User-Agent: Mozilla Thunderbird 1.0.7-1.1.fc3 (X11/20050929) MIME-Version: 1.0 To: Daniel Jacobowitz CC: Nick Roberts , Vladimir Prus , gdb@sources.redhat.com Subject: Re: MI: changing breakpoint location References: <17433.61359.500131.182453@kahikatea.snap.net.nz> <20060316231215.GA25222@nevyn.them.org> In-Reply-To: <20060316231215.GA25222@nevyn.them.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2006-03/txt/msg00107.txt.bz2 Daniel Jacobowitz wrote: > On Fri, Mar 17, 2006 at 12:07:27PM +1300, Nick Roberts wrote: > >> > Now, I have to delete the old breakpoint and create the new one, which is >> > workable, but not convenient. >> >>I don't find a problem with that, but it would be nice if when a program is >>edited and recompiled that GDB could track the line number. So, for example >>if the breakpoint is on line 10, say, and lines 4 and 5 are deleted, then >>after recompiling and restarting, its on line 8. I think Visual Stuio has >>this feature. I have no idea how easy/hard it would be to implement. > > > Hard. RMS once asked for a simpler version of this, which is to track > breakpoints by line number relative to the start of the function; but > really we ought to be able to do this very well. > > I'm thinking something like "remember a couple lines of context, if you > can find the same context, adjust the breakpoint and warn the user". > But there's some risk of it landing in the wrong place; I don't know > how to do it reliably but I bet a motivated developer would come up > with something :-) > > Of course, then we'd have to let the MI interpreter know about the > change too, so that the editor could refresh. I have no idea whether > GUIs would want this behavior or not; wouldn't they want to track it > themselves assuming you used the GUI's editor? > I can't see why you would want to do it anyplace *other* than the editor. It would know for sure which lines had been added and deleted. Anything else would just be guessing. David Daney.