signal handler priority issue

[Sean McNeil]

On Fri, 2004-06-11 at 07:40, David Xu wrote:
> Sean McNeil wrote:
> 
> >Sorry for top-posting, but it may be easier to read this way....
> >
> >The program below has an optimization bug in that done isn't declare
> >volatile.  With that fixed, it works just fine.  I've been attempting to
> >get boehm-gc working and it seems OK with libc_r, but fails with
> >libpthread.  It is essentially doing what the program below does, but
> >for some reason it gets stuck.  Has anyone else been experimenting with
> >boehm-gc?
> >
> >Also, it would really help if I had a debugger that worked with kse
> >threads.  How is that going?  Tracking down pthread issues right now has
> >been difficult with the current debugger.  Can anyone throw some patches
> >my way that may help?
> >  
> >
> Please try the patch:
> http://people.freebsd.org/~davidxu/kse/thr_sigsuspend.c.diff
> 
> the patch is for file /usr/src/lib/libpthread/thread/thr_sigsuspend.c,
> I believe I caught a bug in the sigsuspend(), thread
> should scan pending signals first, only when there is
> no pending signal in wait set,  the thread can sleep.
> 
> David Xu

This patch makes sigsuspend work, but there is still something missing. 
The actual signal handler is not getting called so I sit in an infinite
loop waiting for the signal handler to set something.