Re: [RFC] multi-process gdb (forks, checkpoints)

[Daniel Jacobowitz <drow@false.org>]

On Tue, Nov 29, 2005 at 05:58:43PM -0800, Michael Snyder wrote:
> Jim Blandy wrote:
> >What happens if we fork, and then one of the forks unloads or loads a
> >shared library?
> >
> >We're really crippled by our symtab data structures.
> 
> Hmmm... unload would be the bigger problem, I suppose.

Yes.  Eventually we just need to improve the symtab interface enough to
permit this.  I think it's not an unreachable goal.  The user interface
is going to get thornier and thornier, though.

> I'd look at it this way -- this is really a subset of "debugging
> separate processes".  The subset is, processes that share the same
> symbol set.  What you suggest is crowding that boundary.   ;-)
> 
> We know that the set of programs that can be debugged this way
> is prescribed.  Can't do multi-threaded programs, for instance.

Right - we can't duplicate them - we could more or less fake it, but
they know too much about their TIDs, and their TLS, et cetera.

-- 
Daniel Jacobowitz
CodeSourcery, LLC