From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 12 Feb 2010 17:29:51 +0100
From: Stefan Kisdaroczi <kisda@domain.hid>
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Subject: Re: [Xenomai-core] Yet another ((weak)) bug
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Am 12.02.2010 17:22, schrieb Jan Kiszka:
> Gilles Chanteperdrix wrote:
>> Jan Kiszka wrote:
>>> Gilles Chanteperdrix wrote:
>>>> Jan Kiszka wrote:
>>>>> Hi Gilles,
>>>>>
>>>>> this one requires some fixing too:
>>>>>
>>>>> xeno_sem_heap is marked weak. xeno_init_sem_heaps is called once pe=
r
>>>>> initialized skin. It unmaps any existing heap and creates a new one=
=2E
>>>>> That's already fragile during constructor run, but it's lethal duri=
ng
>>>>> process runtime, ie. when using dlopen.
>>>>>
>>>>> I think the solution is to handle forks separately and only remap i=
n
>>>>> that case. Digging in this direction now.
>>>>>
>>>>> BTW, what triggers the re-run of xeno_init_sem_heaps after a fork s=
o far?
>>>> It must be done for the child process to get a private heap differen=
t
>>>> from the parent process. I would guess it is handled by pthread_atfo=
rk.
>>> Ah, only the POSIX skin does that. However, sem-heaps must not be
>>> POSIX-only. OK, patch in the make.
>>
>> Ok. I am thinking more and more that you are right about making
>> libxeno_common a standalone library. Only the name stinks, we should
>> find a better one.
>=20
> libxnskin or so?
>=20
> Jan
>=20

libxenomai ?

Stefan


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