Re: [RFC] solib for darwin

[Tristan Gingold <gingold@adacore.com>]

On Dec 4, 2008, at 4:38 PM, Ulrich Weigand wrote:

> Interesting; I've been running into the same problem with supporting
> SPU contexts as libraries in the context of the multi-architecture
> Cell debugger.

Fun!  We have common interest to improve the multi-arch support in gdb.

> However, instead of just overriding the bfd_check_format call (which
> b.t.w. does a lot more than just checking the format, no matter its
> name :-/), I've allowed the solib implementation to override the
> whole solib_bfd_open call; this seems to provide more options for
> future changes ...

Right, your approach is more generic that mine.  However with your  
approach,
we need to also create a more generic version of solib_bfd_open so  
that the
overriders don't have to duplicate all the features of the current  
solib_bfd_open
(handling remotes, pathes...)

I think that with your patch I don't need anymore to change non-Darwin  
files.

> I've been wondering about the two bfds as well; note that solib simply
> mirrors what is being done for the main executable file (where we have
> one bfd for the exec file and one for the symbol file).  With my
> patch I've kept two bfds, but call the solib override implementation
> to open each of them.

My concern was speed and memory resources as the number of shared  
libraries might be
large and access to them are slower (search path, ...)
Anyway, this can be addressed later.

> Maybe you can have a look at my patch:
> http://sourceware.org/ml/gdb-patches/2008-09/msg00136.html
> and see whether this would solve your problem as well (or if we can
> come up with a joint approach to solve both problems).

I think it does.  Do you plan to commit it ?

Thanks,
Tristan.