RFR [9]: Bulk backport to sh/jdk9

[Roman Kennke]

Am 16.10.2017 um 21:12 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20171016/webrev.01/
>
> This change backports most of the outstanding work to sh/jdk9. It is based on the patch that purges
> partial and matrix code from 9, and this is why the webrev is relatively small.
>
> Changes include:
>
> rev 13688 : [backport] Remove ShenandoahGCWorkerPerJavaThread flag
> rev 13689 : [backport] Double check for UseShenandoahGC in WB expand
> rev 13690 : [backport] Verifier should print verification label at liveness verification
> rev 13691 : [backport] Mark bitmap slices commit/uncommit + Aggregated bitmap slicing
> rev 13692 : [backport] Fixed several string dedup bugs
> rev 13693 : [backport] Fix (external) heap iteration + TestHeapDump should unlock aggressive heuristics
> rev 13694 : [backport] Pauses that do not affect heap occupancy should not report heap
> rev 13695 : [backport] Make sure -XX:+ShenandoahVerify comes first in the tests
> rev 13696 : [backport] Add -XX:+ShenandoahVerify to more interesting tests
> rev 13697 : [backport] Clean up dead code
>
> I need sign-offs from everybody.
>
> Testing: hotspot_gc_shenandoah {fastdebug|release}
>
> Thanks,
> -Aleksey
>
I went through it. Changes look good to me.

One thing I remember from last backports->integration: You seem to make 
all changesets to appear as from 'shade'. I'd find it useful to retain 
the original committer if possible, in order to be able to figure out 
later who made the original change (e.g. in case of bugs or such). (I 
think I mentioned this before: hg transplant is great for such stuff and 
also works with mq afair).

Thanks for doing this!

Roman