RFR: [8u] 2018-02-27: Bulk backports to sh/jdk8u

[Roman Kennke]

Looks good. Thank you!

On Tue, Feb 27, 2018 at 4:46 PM, Aleksey Shipilev <shade at redhat.com> wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk8u-20180227/webrev.01/
>
> This backports outstanding work from past few weeks to sh/jdk8u:
>
> abcc68d17515: [backport] ShenandoahWriteBarrierNode::find_bottom_mem() fix
> 927e60a90261: [backport] Move barriers into typeArrayOop.hpp direct memory accessors
> 33fec4c5103f: [backport] Roots verification should take the special roots first
> 0fdb1403c046: [backport] Refactor allocation metadata handling
> d01efdbba161: [backport] Denser ShHeapRegion status line
> f17cd086a664: [backport] Record Shenandoah events in hs_err events section
> 0c83f38776f5: [backport] Fixed code roots scanning that might be bypassed during degenerated cycle
> af376fee7138: [backport] Consistent liveness for humongous regions
> 521d2597f753: [backport] RP closures should accept NULL referents
> 2a2fe8eff7cc: [backport] ReferenceProcessor is_alive setup is racy
> aea30526d0a4: [backport] Speed up asserts and verification, improve fastdebug builds performance
>
> It still misses Degenerated GC, because it still fails the tests.
>
> Testing: hotspot_gc_shenandoah {fastdebug|release}
>
> Thanks,
> -Aleksey
>