From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-return-26644-listarch-gdb=sources.redhat.com@sourceware.org>
Received: (qmail 17408 invoked by alias); 22 Oct 2006 23:18:53 -0000
Received: (qmail 17400 invoked by uid 22791); 22 Oct 2006 23:18:52 -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; Sun, 22 Oct 2006 23:18:50 +0000
Received: from drow by nevyn.them.org with local (Exim 4.54) 	id 1Gbmad-0008K8-Ke; Sun, 22 Oct 2006 19:18:47 -0400
Date: Sun, 22 Oct 2006 23:18:00 -0000
From: Daniel Jacobowitz <drow@false.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: dewar@adacore.com, rodney.bates@wichita.edu, gdb@sourceware.org
Subject: Re: breakpoint for accessing memory location
Message-ID: <20061022231847.GA31942@nevyn.them.org>
Mail-Followup-To: Eli Zaretskii <eliz@gnu.org>, dewar@adacore.com, 	rodney.bates@wichita.edu, gdb@sourceware.org
References: <ufydhpu0o.fsf@gnu.org> <20061021155125.GA9177@nevyn.them.org> <uejt1pdhp.fsf@gnu.org> <20061021223200.GA21012@nevyn.them.org> <u8xj9oufd.fsf@gnu.org> <20061022042230.GA28995@nevyn.them.org> <453B61AD.7030605@adacore.com> <uejt0vvsl.fsf@gnu.org> <20061022222142.GA30437@nevyn.them.org> <ubqo4vvbq.fsf@gnu.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <ubqo4vvbq.fsf@gnu.org>
User-Agent: Mutt/1.5.13 (2006-08-11)
X-IsSubscribed: yes
Mailing-List: contact gdb-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Subscribe: <mailto:gdb-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb/>
List-Post: <mailto:gdb@sourceware.org>
List-Help: <mailto:gdb-help@sourceware.org>, <http://sourceware.org/ml/#faqs>
Sender: gdb-owner@sourceware.org
X-SW-Source: 2006-10/txt/msg00206.txt.bz2

On Mon, Oct 23, 2006 at 12:28:57AM +0200, Eli Zaretskii wrote:
> > Date: Sun, 22 Oct 2006 18:21:43 -0400
> > From: Daniel Jacobowitz <drow@false.org>
> > Cc: Robert Dewar <dewar@adacore.com>, rodney.bates@wichita.edu,
> > 	gdb@sourceware.org
> > 
> > >    Warning: attempt to watch constant expression.
> > 
> > I think that would be a useful warning, but that we shouldn't go to the
> > trouble of making it catch things like "p-p" where you would need an
> > optimizer to figure it out.
> 
> Trouble? what trouble?  Just sample the value of the expression for
> several random values of the variables, and if the value doesn't
> change, consider it constant.

Was this sarcasm?  If not, please consider "watch p != 42" for a couple
of random values of p.

-- 
Daniel Jacobowitz
CodeSourcery