finally getting gdb to work?

finally getting gdb to work?

[Andrea Crotti]

I don't understand what happens here, yesterday for the first time I saw
how I should be supposed to debug in emacs (with gdb).

It was great, jumping, easily set breakpoints and so on.
By default this  "gdb-many-windows" is nil and until I didn't set it to
"t" I thought that text-mode stuff was all I was getting.

After some other time and trying also out pdb then nothing works
anymore!

When I run
M-x gdb test
I don't anymore the windows set, and if I call gdb-restore-windows I
don't get a working debug environment anyway (only the windows set).
Here is my very simple conf

--8<---------------cut here---------------start------------->8---
#+begin_src emacs-lisp :tangle yes
   (setq gdb-show-main nil)
   (setq gdb-many-windows t)

#+end_src 

*** Some advices for pdb
#+begin_src emacs-lisp :tangle yes
  (defadvice pdb (before gud-query-cmdline activate)
    "Provide a better default command line when called interactively."
    (interactive
     (list (gud-query-cmdline 'pdb.py
                              (file-name-nondirectory buffer-file-name)))))
#+end_src
--8<---------------cut here---------------end--------------->8---

Anyone has an idea?

Ah another thing, I also have to debug some code which compiles only on
a virtual machine, which I can access via ssh.

Now I work on it via sshfs, but I would like to debug it directly.
Is there some way to automate the debugging process from another
machine (with gdbserver or tramp maybe?)?

Thanks a lot

Re: finally getting gdb to work?

[Michael Albinus]

Andrea Crotti <andrea.crotti.0@gmail.com> writes:

> Ah another thing, I also have to debug some code which compiles only on
> a virtual machine, which I can access via ssh.
>
> Now I work on it via sshfs, but I would like to debug it directly.
> Is there some way to automate the debugging process from another
> machine (with gdbserver or tramp maybe?)?

It should run with Emacs 23.1 + Tramp. See
<http://www.gnu.org/software/tramp/#Remote-processes>.

Unfortunately, this is broken in Emacs 23.2, because the package
gdb-mi.el needs pty support, which is not possible with Tramp (yet).

> Thanks a lot

Best regards, Michael.

Re: finally getting gdb to work?

[Andrea Crotti]

>
> It should run with Emacs 23.1 + Tramp. See
> <http://www.gnu.org/software/tramp/#Remote-processes>.
>
> Unfortunately, this is broken in Emacs 23.2, because the package
> gdb-mi.el needs pty support, which is not possible with Tramp (yet).
>

Amazing, it works like a charm!
Now I get back all the windows set up correctly by the way, I don't
understand why sometime it doesn't work...

To me it works also on emacs 23.2 anyway, with
GNU Emacs 23.2.1 (x86_64-apple-darwin10.3.0, NS apple-appkit-1038.29) of
2010-05-09 on linc
and tramp:
2.1.18-23.2

It would also be nice some kind of autodiscovery of what to debug (well
I can also use the history), but maybe if I put some file with some data
in some directories it's looked up automatically...

Re: finally getting gdb to work?

[Andrea Crotti]

I think I was doing a stupid mistake, just forgetting the --annotate.
Which I don't understand what it does by the way, because it's not in
the manual of gdb but apparently does something...

Re: finally getting gdb to work?

[Bastian Beischer]

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From the info pages of GDB:

`-annotate LEVEL'
     This option sets the "annotation level" inside GDB.  Its effect is
     identical to using `set annotate LEVEL' (*note Annotations::).
     The annotation LEVEL controls how much information GDB prints
     together with its prompt, values of expressions, source lines, and
     other types of output.  Level 0 is the normal, level 1 is for use
     when GDB is run as a subprocess of GNU Emacs, level 3 is the
     maximum annotation suitable for programs that control GDB, and
     level 2 has been deprecated.

     The annotation mechanism has largely been superseded by GDB/MI
     (*note GDB/MI::).


On Thu, Jul 22, 2010 at 1:20 PM, Andrea Crotti <andrea.crotti.0@gmail.com>wrote:

>
> I think I was doing a stupid mistake, just forgetting the --annotate.
> Which I don't understand what it does by the way, because it's not in
> the manual of gdb but apparently does something...
>
>
>


-- 
Bastian Beischer

I. Physikalisches Institut B (RWTH Aachen)
Sommerfeldstr. 14
52074 Aachen
GERMANY

Office: 28-C-203
Phone: +49 241 - 8027205

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Re: finally getting gdb to work?

[Michael Albinus]

Andrea Crotti <andrea.crotti.0@gmail.com> writes:

> To me it works also on emacs 23.2 anyway, with
> GNU Emacs 23.2.1 (x86_64-apple-darwin10.3.0, NS apple-appkit-1038.29) of
> 2010-05-09 on linc
> and tramp:
> 2.1.18-23.2

I stay corrected. gdb-mi.el was introduced with Emacs 24.0.50.

Best regards, Michael.

Re: finally getting gdb to work?

[Andrea Crotti]

Michael Albinus <michael.albinus@gmx.de> writes:

>
> I stay corrected. gdb-mi.el was introduced with Emacs 24.0.50.
>
> Best regards, Michael.

Ah right I understood that the remote thing was not working...
gdb-mi is pretty cool, but for now also the normal gdb is great