RFR: Merge from upstream jdk/jdk10

[Aleksey Shipilev]

On 02/14/2018 08:22 PM, Roman Kennke wrote:
> I've got the merge from upstream jdk/jdk10 ready.
> The most notable stuff:
> - new GC interface (e.g. new shenandoahArguments.hpp/cpp classes,
> GC-serviceability stuff moved under gc/$GC dirs, lots of refactorings)
> - BarrierSet cleanup and new interface for runtime heap access
> (BarrierSet::AccessBarrier and friends)
> 
> Should considerably reduce Shenandoah-specific shared code changes.
> 
> Testing: passes hotspot_gc_shenandoah (release+fastdebug) and sanity
> testing with specjvm
> 
> A webrev wouldn't be very useful. It brings shenandoah/jdk10 up to the
> current revision of jdk/jdk10.

If it passes the tests, sure! Tell me, what is the latest "parent" revision in upstream you are
merging with? I want to update the webrev generator ahead of time.

-Aleksey