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Date:      Wed, 26 Jun 2013 23:45:21 +0300
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Dimitry Andric <dim@FreeBSD.org>
Cc:        Matthias Andree <mandree@FreeBSD.org>, Brooks Davis <brooks@FreeBSD.org>, David Chisnall <theraven@freebsd.org>, "freebsd-ports@freebsd.org Ports" <freebsd-ports@freebsd.org>, Michael Gmelin <freebsd@grem.de>
Subject:   Re: Global destructor order problems (was: Re: Are ports supposed to build and run on 10-CURRENT?)
Message-ID:  <20130626204521.GU91021@kib.kiev.ua>
In-Reply-To: <7CD9075C-F8D6-41C1-8D21-8B10DF866ECE@FreeBSD.org>
References:  <20130613031535.4087d7f9@bsd64.grem.de> <EF830CD7-00F1-4628-8515-76133BBE85E7@FreeBSD.org> <C1CC40FC-4489-4164-96B7-5E1A25DCB37F@FreeBSD.org> <20130626015508.426ab5b9@bsd64.grem.de> <51CAADB8.7090603@FreeBSD.org> <20130626133149.4835f14a@bsd64.grem.de> <7CD9075C-F8D6-41C1-8D21-8B10DF866ECE@FreeBSD.org>

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On Wed, Jun 26, 2013 at 09:26:09PM +0200, Dimitry Andric wrote:
> This revision is not in 9.1-RELEASE, but it is in 9-STABLE, so the
> problem can also be reproduced there.
...
> This is roughly gcc 4.3.0 and later.  For example, gcc 4.8 generates:
I just tested the thing with gcc 4.8 on up to date stable/9 and HEAD.
In both cases, major tom did not fail, at least not in the peculiar way.
The gcc-generated code passed the PLT address of the corresponding
destructor.

The r211706 intent is indeed to prevent a situation when the libc calls
the atexit(3)-registered termination function from dso which is already
unloaded.  This is apparently epidemic with PHP and similar environments.


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