Re: GDB server and threaded application

[Vladimir Gurevich <vag at paulidav dot org>]

Hi Kalpesh!

Kalpesh Jasapara wrote:
> I am having a problem with remote gdb debugging
> using gdbserver to work with multi threads.
> The command "info threads" shows only one thread.

Here is a relevant excerpt from Wolfgang Denk's
posting from ppc-embedded:

> Dear Owen,
>
> in message <20020820144703 dot 16442 dot qmail at web20107 dot mail dot yahoo dot com> you wrote:
>
> > I`m trying to debug a multi-threaded application using
> > gdbserver on the remote/target side and I`m having
> > some problems, the output I got is depicted below:
>
>
> I'm not surprised. This is broken in most versions of GDB / gdbserver
> floating around.
>
>
> > I`m using gdbserver5.2.1 (I tried the one from HHL-2.0
> > Journeyman and didn`t worked too) compiled by myself
> > using Mvista HHL 2.0 tools and gdb 5.2.1 on my i386.
> > Am I doing something wrong or remote thread debugging
> > is not supported by gdb? I have read something about
>
>
> Let's say the support is incomplete :-)
>
> > problems with multi-thread application debugging but I
> > thought that it may be OK at this time...
> > Could someone explain to me what`s happening?
>
>
> Check out our ELDK  (see  http://www.denx.de/ELDK);  it  contains  an
> extended  /  bug  fixed  version  of  GDB  / gdbserver; remote target
> debugging of MT applications was one of the areas where we spend some
> work.
>
> If you're just looking for the patches: these can be found on our FTP
> server; the README including description of the test procedure is at
> ftp://ftp.denx.de/pub/ppc/patches/README-GDB-MT-Support

I hope this helps.

Cheers,
Vladimir