From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27546 invoked by alias); 15 May 2006 20:05:54 -0000 Received: (qmail 27521 invoked by uid 22791); 15 May 2006 20:05:53 -0000 X-Spam-Check-By: sourceware.org Received: from nevyn.them.org (HELO nevyn.them.org) (66.93.172.17) by sourceware.org (qpsmtpd/0.31.1) with ESMTP; Mon, 15 May 2006 20:05:51 +0000 Received: from drow by nevyn.them.org with local (Exim 4.54) id 1FfjK7-000286-66; Mon, 15 May 2006 16:05:47 -0400 Date: Mon, 15 May 2006 20:09:00 -0000 From: Daniel Jacobowitz To: Bob Rossi Cc: PAUL GILLIAM , gdb@sourceware.org Subject: Re: invoking GDB from FE and signals Message-ID: <20060515200547.GA8151@nevyn.them.org> Mail-Followup-To: Bob Rossi , PAUL GILLIAM , gdb@sourceware.org References: <20060513141920.GC10678@brasko.net> <20060513145421.GA3664@nevyn.them.org> <20060513151026.GD10678@brasko.net> <20060513151057.GA4112@nevyn.them.org> <20060513152021.GE10678@brasko.net> <20060513154816.GA5022@nevyn.them.org> <1147712871.3672.153.camel@dufur.beaverton.ibm.com> <20060515181821.GA18932@brasko.net> <20060515191714.GA5918@nevyn.them.org> <20060515194313.GA21608@brasko.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060515194313.GA21608@brasko.net> User-Agent: Mutt/1.5.11+cvs20060403 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: 2006-05/txt/msg00219.txt.bz2 On Mon, May 15, 2006 at 03:43:14PM -0400, Bob Rossi wrote: > On Mon, May 15, 2006 at 03:17:14PM -0400, Daniel Jacobowitz wrote: > > On Mon, May 15, 2006 at 02:18:21PM -0400, Bob Rossi wrote: > > > OK, here's what happens from the FE perspective though. You type ^c. The > > > FE get's the signal (which is in a different process group than GDB), > > > and passes the signal to GDB with 'kill (gdb_pid, SIGINT)'. > > > > Jim just explained this, but it may not have been clear: that is the > > wrong way to forward the signal. If you are running GDB on a > > pseudo-tty, you need to forward the job control signal to that TTY, not > > to the GDB process itself. > > > > I don't really know how to do that. Is it by setting BRKING in > > termios? There's something about TIOCSIGNAL too. Lots of code for > > this in emacs. > > I'm totally confused. I'm certainly not an expert, but sending a signal > can only be done to a pid using kill. What other ways are there? Read it again :-) You don't want to send the signal to a specific process. You want to cause the pseudo-terminal to signal the correct process group. (Also, process group != pid; you can kill negative pids, see a POSIX reference). -- Daniel Jacobowitz CodeSourcery