RFR(XS): 8193308: Disallow installing user signal handlers for SIGBUS on OSX

[mandy chung]

On 2/12/18 6:43 AM, Roger Riggs wrote:
> I can't see a handler for SIGBUS or SIGSEGV being make correct or 
> useful to a java handler.
> Maybe it is up to sun.misc.Signal to refuse to register those 
> handlers, independent of
> JVM_RegisterSignal. 

Yes the API should accept only the handlers for the signals which make 
sense.   Since sun.misc.Signal is unsupported, it may not worth making 
such change.  It makes sense to do that in the API replacement.

Mandy