MT safe exception diffs

[Jason Merrill]

>>>>> Teemu Torma <tot@Trema.COM> writes:

>     From:  Jason Merrill <jason@cygnus.com>
>     Date:  30 Sep 1997 00:25:46 -0700

>     The thread handling stuff needs to be independent of the EH code.  The EH
>     code should use a single interface to the various threads packages, and
>     the Objective-C frontend should use the same interface.  The current objc
>     thread code will probably be useful as a starting point.

> It would be nice, but in the case of sjlj-exceptions, EH context 
> is needed even if nothing is thrown.  Adding few instructions more
> makes it just slower.
    
Then make them inline.

Jason