[Bug 21896] sigaltstack: invalid argument

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21896

--- Comment #3 from Matias Colli <matiasbsd at gmail.com> 2012-05-03 07:10:21 CDT ---
OpenBSD has an inferior implementation of pthreads(3).

    OpenBSD, like other systems that resemble Unix, provides the pthreads
interface for multithreaded programming, which allows one process to run
multiple threads at the same time, while the threads share the memory and the
open files.
    The other systems provide kernel threads through pthreads. OpenBSD still
provides pthreads through a user-mode library, with no kernel support; so
threads above OpenBSD have problems or limitations. The most obvious limitation
is that the OpenBSD pthreads library confines all threads of a process to one
processor.
    Another limitation, which seems arbitrary, is that programs using OpenBSD
pthreads cannot use sigaltstack(2).

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