RFR: Refactor alive-closures to deal better with new marking contexts

[Roman Kennke]

Am 19.07.2018 um 10:57 schrieb Aleksey Shipilev:
> On 07/19/2018 12:43 AM, Roman Kennke wrote:
>> Turns out this was easier to do than I suspected. RefProc does already
>> take NULL alive-closure and resets it when used. This means that we
>> already carried unnecessary cruft in the form of our static
>> alive-closure and forwarded-alive-closure. The tricky part was to
>> abstract out the selection logic, this is now in a little helper class
>> called ShenandoahIsAlive.
>>
>> http://cr.openjdk.java.net/~rkennke/aliveclosures/webrev.00/
>>
>> Testing: tier1_gc_shenandoah passed, pending tier3_gc_shenandoah before push
> 
> Looks okay. I would rename ShenandoahIsAlive -> ShenandoahIsAliveSelector
> 


Right. I'll push this then:

http://cr.openjdk.java.net/~rkennke/aliveclosures/webrev.01/

Thanks for reviewing!

Roman