On Fri, Apr 17, 2015 at 07:34:30PM +0200, Jan Kiszka wrote:
> Hi,
>
> analyzing page faults of an application that prefers to set its own
> stacks, I noticed a problem in Xenomai (2 and 3), at least from the
> usability POV: We document the minimum stack stack as PTHREAD_STACK_MIN
> + 1 page, at least in Xenomai 3, and we enforce that on thread creation.
> However, enforcement is doomed to fail if the stack is preallocated (and
> that too small).
>
> As we cannot detect if the user set a stack address in pthread_attr_t, I
> would suggest to fail thread creation instead of performing it with
> improper parameters. Other suggestions? If not, I would prepare a patch
> for Xenomai 3 (for 2 only if desired).
It seems to me we can detect the parameters in the pthread_attr_t
using pthread_attr_getstack. So, we can get __wrap_pthread_create to
fail if the size is not sufficient.
--
Gilles.
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