RFR: FinalEvac pause to turn off evacuation

[Aleksey Shipilev]

On 03/15/2018 04:19 PM, Roman Kennke wrote:
> Diff:
> http://cr.openjdk.java.net/~rkennke/final-evac/webrev.02.diff/
> Full:
> http://cr.openjdk.java.net/~rkennke/final-evac/webrev.02/

*) Regression: Verifier always runs at final-evac. Protect it with ShenandoahVerify. (I think it
should have asserted, to be honest... have you ran tests?)

*) VM_ShenandoahVerifyHeapAfterEvacuation used to override these:

 166   // We don't care about that here.
 167   bool deflates_idle_monitors() { return false; }
 168   bool marks_nmethods() { return false; }

Otherwise good.

Thanks,
-Aleksey