RFR: Upstream merge to jdk-12+21

[Roman Kennke]

> On 11/22/18 6:52 PM, Aleksey Shipilev wrote:
>> On 11/22/18 6:50 PM, Roman Kennke wrote:
>>> Is there a fix to cherry-pick already? I can also wait a little...
>>
>> Roland and others are working on it here:
>>   http://mail.openjdk.java.net/pipermail/hotspot-dev/2018-November/035402.html
>>
>> Realistically, I would give it a day to properly hit the repo and testing.
> 
> Also, it would be after jdk-12+21 tag, right? So we gain nothing by waiting. It is easier for us to
> cherry-pick after the merge, and wait next week for another merge to gain the actual fix.

Ok, I'll push it then.
Thanks,
Roman