RFR: [9] 2018-03-05: Bulk backports to sh/jdk9

[Roman Kennke]

Looks good.

On Mon, Mar 5, 2018 at 10:10 AM, Aleksey Shipilev <shade at redhat.com> wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20180305/webrev.01/
>
> a7a034e0dafc: [backport] Arraycopy fixes (tests and infrastructure)
> 1fd7115d90f4: [backport] Fixed pinned region handling in mark-compact
> 58d091ca55ba: [backport] Cleanup allocation tracking in heuristics
> d9333bb79c2c: [backport] Setup process references and class unloading once before the cycle
> fbbd713f1211: [backport] Print message when heuristics changes the setting ergonomically
> 6a2a2deffcab: [backport] Refactor uncommit handling: react on explicit GCs, feature kill flag, etc
> 3c0dbf1ed0fd: [backport] "Compact" heuristics for dense footprint scenarios
>
> Applied almost trivially.
>
> Testing: hotspot_gc_shenandoah {fastdebug|release}
>
> Thanks,
> -Aleksey
>