From: Daniel Jacobowitz <drow@mvista.com>
To: Doug Evans <dje@transmeta.com>
Cc: Matt Thomas <matt@3am-software.com>,
Michael Snyder <msnyder@redhat.com>,
gdb@sources.redhat.com
Subject: Re: breakpoint commands and finish
Date: Thu, 17 Apr 2003 20:50:00 -0000 [thread overview]
Message-ID: <20030417204953.GA26080@nevyn.them.org> (raw)
In-Reply-To: <16031.4562.644834.479261@casey.transmeta.com>
On Thu, Apr 17, 2003 at 01:42:58PM -0700, Doug Evans wrote:
> Daniel Jacobowitz writes:
> > > rbreak (or ebreak). I find I often was to place a breakpoint at the
> > > end of a function; it'd be nice if gdb could do that automaticly.
> >
> > It's too darned hard :) Debug info does not represent the exit point
> > of the function. It's not always at the end; modern gcc's can emit
> > multiple exit edges, too.
>
> And if a tail-call optimization has been done, it gets even harder.
>
> OTOH, if one stops at the first instruction of a function,
> presumably it'd then be easy to set a breakpoint at the return address.
> I wonder if gdb's macro facility is sufficient to write a macro
> that would make this almost user-friendly: it would set a
> breakpoint at the start of the function (pre-prologue) then have
> commands that first sets a tbreak breakpoint at the return address
> and then continues. You couldn't already be in the function of
> course (but if you were presumably you'd use "finish").
>
> ?
The macro facility isn't, but a command could be added to do this
without much trouble. I would rather us discuss the semantics of
commands lists containing commands which resume the inferior. There
must be a more user-useful way to approach it than we do now.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
next prev parent reply other threads:[~2003-04-17 20:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-14 20:56 Matt Thomas
2003-04-14 21:00 ` Joel Brobecker
2003-04-14 21:04 ` Joel Brobecker
2003-04-14 21:11 ` Doug Evans
2003-04-14 21:33 ` Joel Brobecker
2003-04-14 22:27 ` Doug Evans
2003-04-14 21:23 ` Matt Thomas
2003-04-17 17:47 ` Michael Snyder
2003-04-17 18:48 ` Matt Thomas
2003-04-17 20:19 ` Daniel Jacobowitz
2003-04-17 20:44 ` Doug Evans
2003-04-17 20:50 ` Daniel Jacobowitz [this message]
2003-04-17 21:19 ` Doug Evans
2003-04-17 21:44 ` Daniel Jacobowitz
2003-04-17 23:11 ` return value of a gdb command Smita
2003-04-17 23:13 ` Daniel Jacobowitz
2003-04-18 12:10 ` Bob Rossi
2003-04-18 13:38 ` Daniel Jacobowitz
2003-04-21 20:55 ` Andrew Cagney
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