From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>
Subject: Re: [Xenomai-core] Yet another ((weak)) bug
Date: Fri, 12 Feb 2010 16:25:58 +0100 [thread overview]
Message-ID: <4B757306.5070102@domain.hid> (raw)
In-Reply-To: <4B757217.3060406@domain.hid>
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.
next prev parent reply other threads:[~2010-02-12 15:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-12 15:21 [Xenomai-core] Yet another ((weak)) bug Jan Kiszka
2010-02-12 15:25 ` Gilles Chanteperdrix [this message]
2010-02-12 15:37 ` Jan Kiszka
2010-02-12 15:54 ` Gilles Chanteperdrix
2010-02-12 16:45 ` Jan Kiszka
2010-02-12 16:03 ` Gilles Chanteperdrix
2010-02-12 16:22 ` Jan Kiszka
2010-02-12 16:29 ` Stefan Kisdaroczi
2010-02-12 21:14 ` Gilles Chanteperdrix
2010-02-24 13:18 ` Jan Kiszka
2010-02-24 14:08 ` Gilles Chanteperdrix
2010-03-01 14:00 ` Jan Kiszka
2010-03-01 14:02 ` Gilles Chanteperdrix
2010-03-01 14:05 ` Jan Kiszka
2010-03-02 0:13 ` Gilles Chanteperdrix
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