This is the mail archive of the
gdb@sources.redhat.com
mailing list for the GDB project.
Re: Nonblocking GDB stub
- From: Michael Snyder <msnyder at redhat dot com>
- To: gdb at sources dot redhat dot com
- Date: Tue, 05 Mar 2002 20:52:11 -0800
- Subject: Re: Nonblocking GDB stub
- Newsgroups: cygnus.gdb
- Organization: Red Hat, Inc.
- References: <3C80203E.49EFDC35@acc.com>
Mattias Wildeman wrote:
>
> Hello!
>
> I've been using GDB for a while, running it with a ARM based board and a
>
> serial connection (remote debugging).
>
> To activate GDB, i'll install a breakpoint on the target and connect GDB
> throught that.
> Standard behavior.
>
> Now, what i would like to do is to have GDB interact with the target
> without the target being stopped.
> Yes, this breaks some of the purpose of the debugger, but i would like
> to use GDB to analyze memory and datastructures without freezing the
> program. The OS i am running do support task-switching, so i was
> thinking about making the stub exception_handler non-blocking (e.g.
> remove the while(1==1) statement that makes it accept commands until i
> kill it), and instead have a call scheduled for it regularly.
>
> Has anyone had experience with doing this? Or know of any place were i
> could get more information on this? Is it even feasible?
>
> I looked through Google, but was unable to find anything on this level.
>
> Thank you for your time!
>
> Regards,
> Mattias Wildeman
I did do this once, a number of years ago, so I know it's possible.
You have to watch out for a few things, of course. It makes no sense
to talk about register values, for instance, nor to say run, step, or
continue.