Re: [patch][rfc] Allow GDB to search for the right libthread_db.so.1

[Pedro Alves <pedro@codesourcery.com>]

On Monday 11 May 2009 19:08:46, Paul Pluzhnikov wrote:
> On Mon, May 11, 2009 at 6:12 AM, Pedro Alves <pedro@codesourcery.com> wrote:
> 
> >> handle = dlopen (library, RTLD_NOW);
> >
> > I wonder if making this RTLD_LAZY until you found the correct one
> > wouldn't make sense?
> 
> I don't believe so.
> 
> AFAICT, the reason for RTLD_NOW is to make sure that this
> libthread_db is really compatible with this GDB (doesn't require
> any symbols GDB doesn't provide); and also to prevent GDB from
> dying half way through with "unable to resolve symbol ...".

Yeah.

> Both of these still apply to whatever the "final" libthread_db is
> going to be.
> 
> Why would we want to dlopen(... RTLD_LAZY) and try to initialize
> libthread_db if we are going to reject it as unusable in the end?

To avoid immediate binding of random libc's, but yeah, brain f*rt.

-- 
Pedro Alves