RFR [9]: Bulk backport to sh/jdk9

[Zhengyu Gu]

On 10/25/2017 03:27 PM, Aleksey Shipilev wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20171025/webrev.01/
> 
> Changes include:
> 
> rev 13698 : [backport] Rewrite and fix ShenandoahHeap::marked_object_iterate
> rev 13699 : [backport] Eliminate string dedup cleanup phase and correct UR closure
> rev 13700 : [backport] barrier moved due to null checks needs to always fix memory edges
> rev 13701 : [backport] Incorrect constant folding with final field and -ShenandoahOptimizeFinals
> rev 13702 : [backport] AESCrypt.implEncryptBlock/AESCrypt.implDecryptBlock intrinsics assume non
> null inputs
> rev 13703 : [backport] keep read barriers for final instance/stable field accesses
> rev 13704 : [backport] Added diagnostic flag ShenandoahOOMDuringEvacALot
> rev 13705 : [backport] Rename dynamic heuristics to static
> rev 13706 : [backport] Static heuristics should use non-zero allocation threshold
> rev 13707 : [backport] Static heuristics should be really static and report decisions
> rev 13708 : [backport] missing must_be_not_null() for arguments to String compareTo*/equals*
> 
> These are mostly compiler fixes, so I would like Roland to take a hard look on these. Zhengyu, we
> are backporting String dedup fix, even though it still fails the string dedup stress intermittently.

Yes, I am aware of that. Looks like to be evacuation OOME issue.

FYI: I am working on removing the second bitmap dependency, should have 
something soon.

-Zhengyu


> Roman, take at the remaining parts too?
> 
> Testing: hotspot_gc_shenandoah {fastdebug|release}
> 
> Thanks,
> -Aleksey
>