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From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: [PATCH v3] move the definition of __pthread_tsd_main to the only compilation unit that references it
Date: Mon, 11 Feb 2013 13:51:11 +0100	[thread overview]
Message-ID: <20130211125111.GD6181@port70.net> (raw)
In-Reply-To: <1360585447.9132.70.camel@eris.loria.fr>

* Jens Gustedt <jens.gustedt@inria.fr> [2013-02-11 13:24:07 +0100]:
> 
> In case of dynamic linking, this sounds a bit dangerous to me. Suppose
> I have a program that runs fine, without linking to the key stuff. Say
> it launches a new thread which then has the key table invalid.
> 
> Then I dynamically load a module that uses keys. The thread that has
> an invalid table jumps into a function of that module that calles
> pthread_key_get() ?
> 
> In such a scenario everything would simply crash, wouldn't it?
> 

this weak alias magic only works for static linking
since the .so has non-weak version of the symbols

(the non-weak symbols will take precedence and only
those will be added to the .so, but in .a there will
be objects with weak symbols and objects with non-weak
ones and linker will do the right thing)


      reply	other threads:[~2013-02-11 12:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-11 10:44 Jens Gustedt
2013-02-11 11:14 ` Szabolcs Nagy
2013-02-11 12:24   ` Jens Gustedt
2013-02-11 12:51     ` Szabolcs Nagy [this message]

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