[11] RFR: 2020-04-15, Bulk backports to sh/jdk11

[Roman Kennke]

Ok then.

The patch that you posted looks good.

The remaining ones are for me, I assume? :-)

Roman

> On 4/16/20 11:43 AM, Roman Kennke wrote:
>> Why haven't you included the I-U mode addition?
> 
> Because this batch is already quite large and the rest requires fiddling with other arches as well.
> 
> Left these out:
>   8242316: Shenandoah: Turn NULL-check into assert in SATB slow-path entry
>   8242301: Shenandoah: Inline LRB runtime call
>   8242273: Shenandoah: accept either SATB or IU barriers, but not both
>   8242271: Shenandoah: add test to verify GC mode unlock
>   8242054: Shenandoah: New incremental-update mode
>   8242217: Shenandoah: Enable GC mode to be diagnostic/experimental and have a name
>   8242130: Shenandoah: Simplify arraycopy-barrier dispatching
>   8241700: Shenandoah: Fold ShenandoahKeepAliveBarrier flag into ShenandoahSATBBarrier
>   8241675: Shenandoah: assert(n->outcnt() > 0) at shenandoahSupport.cpp:2858 with
> java/util/Collections/FindSubList.java
>