[aarch64-port-dev ] RFR: Shenandoah import

[Aleksey Shipilev]

On 10/02/2017 02:29 PM, Roman Kennke wrote:
> Notably, it includes a bunch of changes done by Roland that better isolates Shenandoah specific code
> paths in C2 (thus minimizing Shenandoah exposure in non-Shenandoah runs).

Yes, please review for this! This is the most important part in this integration, and we need to get
it out sooner. src/shared/vm/gc_implementation/shenandoah/ changes are the bulk of the change, and
you can review this in a cursory manner.

> http://cr.openjdk.java.net/~rkennke/jdk8u-shenandoah-integration-2017-10-02/webrev.00/

This looks good to me.

Note about src/share/vm/memory/metaspaceCounters.cpp change: it is needed to avoid bootstrapping
circularity with Shenandoah. This addition is retracted in our current development forest, along
with the proper fix. But we need this fix for current integration.

-Aleksey