From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27065 invoked by alias); 21 Feb 2003 01:20:14 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 27055 invoked from network); 21 Feb 2003 01:20:13 -0000 Received: from unknown (HELO nick.uklinux.net) (194.247.49.69) by 172.16.49.205 with SMTP; 21 Feb 2003 01:20:13 -0000 Received: by nick.uklinux.net (Postfix, from userid 501) id 3CAA276037; Fri, 21 Feb 2003 01:17:26 +0000 (GMT) From: Nick Roberts MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15957.32294.506214.978988@nick.uklinux.net> Date: Fri, 21 Feb 2003 01:20:00 -0000 To: gdb@sources.redhat.com Subject: GDB/MI X-SW-Source: 2003-02/txt/msg00454.txt.bz2 The debugger mode that uses GDB/MI which I am trying to write for Emacs uses a queue but I can't get it initialised properly. This is why: If I start with gdb -interp=mi mytest, I get ~"GNU gdb 2003-02-04-cvs\n" ~"Copyright 2003 Free Software Foundation, Inc.\n" ~"GDB is free software, covered by the GNU General Public License, and you are\n" ~"welcome to change it and/or distribute copies of it under certain conditions.\n" ~"Type \"show copying\" to see the conditions.\n" ~"There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n" ~"This GDB was configured as \"i586-pc-linux-gnu\"..." ~"\n" (gdb) I see that the text is now escaped with ~ so I know this is output for the console. However, Emacs don't know that GDB is ready for input. With level 2 annotations, I get: GNU gdb 2003-02-04-cvs Copyright 2003 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i586-pc-linux-gnu"... breakpoints-invalid ^Z^Zframes-invalid ^Z^Zpre-prompt (gdb) ^Z^Zprompt and the prompt annotation tells Emacs that GDB is ready for input. Since Emacs' interaction is asynchronous, the timing is wrong if I assume GDB is ready for input immediately after its invocation. I think the initial output should be: ~"GNU gdb 2003-02-04-cvs\n" ~"Copyright 2003 Free Software Foundation, Inc.\n" ~"GDB is free software, covered by the GNU General Public License, and you are\n" ~"welcome to change it and/or distribute copies of it under certain conditions.\n" ~"Type \"show copying\" to see the conditions.\n" ~"There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n" ~"This GDB was configured as \"i586-pc-linux-gnu\"..." ~"\n" ^done (gdb) i.e GDB should notify its status with the ^done record. I could look for the prompt (gdb) for notification and I imagine this is what gvd does but the idea presumably is to have a machine interface and not rely on output intended for the (human) user. For example this could be defeated with `set prompt'. I will file a bug report if someone agrees with my analysis. Nick Incidently, the string (gdb) that is output here is not the prompt but an imposter as I get: -gdb-set prompt (hec) ^done (gdb) -gdb-show prompt ^done,value="(hec)" (gdb)