RFR: Several cleanups

[Aleksey Shipilev]

On 09/01/2018 10:29 AM, Roman Kennke wrote:
> Am 01.09.2018 um 10:08 schrieb Aleksey Shipilev:
>> On 08/31/2018 11:30 PM, Roman Kennke wrote:
>>> I went over the diff between shenandoah/jdk and jdk/jdk and found some
>>> obvious leftovers:
>>>
>>> http://cr.openjdk.java.net/~rkennke/cleanups/webrev.00/
>>
>> Looks good, except the bit in oop.cpp: are we actually safe doing HeapAccess (with barriers) for
>> metadata? This came from the attempt to dodge barriers during oop_oop_iterate:
>>   http://hg.openjdk.java.net/shenandoah/jdk/rev/fd9d711bcc6d
> 
> I think yes, because it uses AS_NO_KEEPALIVE.

And that protects us from calling write barriers during puts?

I guess if tests are fine, we are fine too.

-Aleksey