Subject: Re: XFree dynamic loader
To: Michael <email@example.com>
From: Nathan J. Williams <firstname.lastname@example.org>
Date: 03/29/2005 14:07:45
Michael <email@example.com> writes:
> > From the stack trace you've posted, though, it looks like the X server
> > is calling pthread_sigmask() from a call chain inside a signal
> > handler, and that's just not going to work.
> Hmm, stupid question - is this NetBSD-specific?
That it's not guaranteed to work ("invokes undefined behavior") is
standardized by POSIX. It may happen to work, or usually happen to
work, in other operating systems.
> Could this confuse the kernel enough to keep it from rebooting?
It shouldn't. This should essentially produce a process spinning in
userland on a spinlock.
> If it is I'll see if I can get rid of this SIGIO stuff, it doesn't
> look like anyone really uses it for anything good anyway. I think
> the signal handler is called because of some mucked up function
> pointer and the server ends up in the SIGIO handler more or less by
That sounds very bad.