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From: Neil Ludban (nludban_at_[hidden])
Date: 2006-06-01 12:42:41


> Date: Tue, 30 May 2006 18:34:41 -0400 (EDT)
> From: "Brian W. Barrett" <brbarret_at_[hidden]>
> Subject: Re: [OMPI devel] memory_malloc_hooks.c and dlclose()
> To: Open MPI Developers <devel_at_[hidden]>
> Message-ID: <Pine.LNX.4.64.0605301833150.21880_at_[hidden]>
> Content-Type: text/plain; charset="us-ascii"
>
> On Mon, 22 May 2006, Neil Ludban wrote:
>
> > I'm getting a core dump when using openmpi-1.0.2 with the MPI extensions
> > we're developing for the MATLAB interpreter. This same build of openmpi
> > is working great with C programs and our extensions for gnu octave. The
> > machine is AMD64 running Linux:
> >
> > Linux kodos 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:29:47 EST 2005 x86_64 x86_64 x86_64 GNU/Linux
> >
> > I believe there's a bug in that opal_memory_malloc_hooks_init() links
> > itself into the __free_hook chain during initialization, but then it
> > never unlinks itself at shutdown. In the interpreter environment,
> > libopal.so is dlclose()d and unmapped from memory long before the
> > interpreter is done with dynamic memory. A quick check of the nightly
> > trunk snapshot reveals some function name changes, but no new shutdown
> > code.
>
> Can you try the attached patch and see if it solves your problem? I think
> it will, but I don't have a great way of testing your exact situation.
>
> Thanks,
>
> Brian
>
> --
> Brian Barrett
> Graduate Student, Open Systems Lab, Indiana University
> http://www.osl.iu.edu/~brbarret/

Problem solved!

Thanks-

-Neil