How to have a separate I/O window (xterm) with GDB and Emacs?

How to have a separate I/O window (xterm) with GDB and Emacs?

[Joachim Nilsson]

Hi!

I'm running the latest bleeding edge GNU Emacs from CVS.  I'm
no beginner so I'm not shy for bisarre elisp or C hacks to
solve my current problem.  I'm posting here because I'm really
stuck.

So, if someone could please tell me how I can have a separate
"execution window" a la DDD when using GDB in Emacs I would be
eternally grateful.

It should be possible somehow by spawning say an xterm and
redirect all program I/O using "gdb -tty=device" ...

Why now would I want to do this and *not* use a native Emacs
buffer like everyone else, am I nuts?  No, I have an ncurses
application that I cannot debug inside Emacs because the
output is completely garbled and on top of that it does not
respond to keyboard input either.

I'd like to run the latest (very nice) GDB-UI in Emacs but I'm
stuck with DDD and its separate execution window for now.


Regards
 /Jocke

-- 
Joachim Nilsson :: <joachim AT vmlinux DOT org> 
+46(0)21-123348 :: <http://vmlinux.org/joachim/>

Re: How to have a separate I/O window (xterm) with GDB and Emacs?

[David Kastrup]

Joachim Nilsson <joachim.nilsson@vmlinux.org> writes:

> I'm running the latest bleeding edge GNU Emacs from CVS.  I'm
> no beginner so I'm not shy for bisarre elisp or C hacks to
> solve my current problem.  I'm posting here because I'm really
> stuck.
> 
> So, if someone could please tell me how I can have a separate
> "execution window" a la DDD when using GDB in Emacs I would be
> eternally grateful.
> 
> It should be possible somehow by spawning say an xterm and
> redirect all program I/O using "gdb -tty=device" ...

You know that gdb can easily attach to running processes with the
`attach' command?  Or by specifying the process id as a second
command line argument to gdb?

So you can easily start your program in an xterm and hook Emacs gdb
session into it.

Heck, you can even start your program inside of Emacs with
M-x term
and do that.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: How to have a separate I/O window (xterm) with GDB and Emacs?

[Joachim Nilsson]

On Wed, 2004-07-07 at 19:04, David Kastrup wrote:
> Joachim Nilsson <joachim.nilsson@vmlinux.org> writes:
> > So, if someone could please tell me how I can have a separate
> > "execution window" a la DDD when using GDB in Emacs I would be
> > eternally grateful.
> > It should be possible somehow by spawning say an xterm and
> > redirect all program I/O using "gdb -tty=device" ...
> You know that gdb can easily attach to running processes with the
> `attach' command?  Or by specifying the process id as a second
> command line argument to gdb?

Ouch, why didn't I come to think of that?  It's a very good
interim solution for me, thank you David!


Regards
 /Jocke

Re: How to have a separate I/O window (xterm) with GDB and Emacs?

[Matthieu Moy]

Joachim Nilsson <joachim.nilsson@vmlinux.org> writes:

> It should be possible somehow by spawning say an xterm and
> redirect all program I/O using "gdb -tty=device" ...

You could write a 2 lines script calling xterm+gdb, and call it from
the prompt of M-x gdb RET. Don't forget to pass the -fullname option
to gdb, Emacs needs it.

> I'd like to run the latest (very nice) GDB-UI in Emacs but I'm
> stuck with DDD and its separate execution window for now.

Do you know you can do

M-x gdb RET ddd --tty <program> RET

To start ddd as a separate window, in addition to the *gud* buffer ?

-- 
Matthieu