From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 12 Feb 2010 16:25:58 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-core] Yet another ((weak)) bug
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To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>

Jan Kiszka wrote:
> Hi Gilles,
> 
> this one requires some fixing too:
> 
> xeno_sem_heap is marked weak. xeno_init_sem_heaps is called once per
> initialized skin. It unmaps any existing heap and creates a new one.
> That's already fragile during constructor run, but it's lethal during
> process runtime, ie. when using dlopen.
> 
> I think the solution is to handle forks separately and only remap in
> that case. Digging in this direction now.
> 
> BTW, what triggers the re-run of xeno_init_sem_heaps after a fork so far?

It must be done for the child process to get a private heap different
from the parent process. I would guess it is handled by pthread_atfork.

-- 
					    Gilles.