RFR: Merge latest upstream jdk/jdk

[Aleksey Shipilev]

On 10/25/2018 06:22 PM, Roman Kennke wrote:
> Highlights:
> 8212186: JVMTI lacks a few GC barriers/hooks
> 8212603: Need to step over GC barriers in Node::eqv_uncast()
> 8212611: Small collection of simple changes from shenandoah
> 
> Applied cleanly.
> Testing: tier3_gc_shenandoah
> 
> http://cr.openjdk.java.net/~rkennke/upstream-jdk12-merge-2018-10-25/outgoing.txt

OK!

-Aleksey