From: Eli Zaretskii <eliz@gnu.org>
To: Joel Brobecker <brobecker@adacore.com>
Cc: pedro@codesourcery.com, gdb-patches@sourceware.org
Subject: Re: Watching expressions that don't involve memory (e.g., watch $regfoo)
Date: Thu, 04 Mar 2010 07:40:00 -0000 [thread overview]
Message-ID: <E1Nn5ez-0006BG-5a@fencepost.gnu.org> (raw)
In-Reply-To: <20100304053017.GH2832@adacore.com> (message from Joel Brobecker on Thu, 4 Mar 2010 09:30:17 +0400)
> Date: Thu, 4 Mar 2010 09:30:17 +0400
> From: Joel Brobecker <brobecker@adacore.com>
> Cc: gdb-patches@sourceware.org
>
> > Anyone else things this is useful? Here's a 5 minute hack at it.
> > +* Watchpoints on expressions not involving memory
> > +
> > + GDB now supports watching expressions that don't involve memory.
> > + This allows, for example, watching for register changes.
> > + E.g. "watch $pc" will do the right thing.
>
> I think that this might be very useful, indeed. For instance, if
> a variable is stored in a register instead of memory.
What would be _really_ nice is if GDB would automatically put a
watchpoint on the register that hold the variable, when the debug info
tells that. In optimized programs, watching the memory alone will
frequently miss value changes.
prev parent reply other threads:[~2010-03-04 7:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-04 1:57 Pedro Alves
2010-03-04 2:05 ` Michael Snyder
2010-03-04 2:13 ` Pedro Alves
2010-03-04 4:12 ` Eli Zaretskii
2010-03-04 13:16 ` Pedro Alves
2010-03-04 14:11 ` Eli Zaretskii
2010-03-04 15:39 ` Pedro Alves
2010-03-04 5:30 ` Joel Brobecker
2010-03-04 7:40 ` Eli Zaretskii [this message]
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