RFR: 8220602: Shenandoah-SA: Enable best-effort implementation of heap walk

[Zhengyu Gu]

Hi,

May I get review from serviceability? as it has minor changes in shared 
code (CollectedHeap.java and ObjectHeap.java)


Thanks,

-Zhengyu


On 3/14/19 11:37 AM, Zhengyu Gu wrote:
> Please review this patch that provides best-effort implementation of 
> live regions iteration for Shenandoah GC.
> 
> There are minor changes in shared code, to adjust oop offset from base 
> of allocation cell.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8220602
> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8220602/webrev.00/index.html
> 
> 
> Test:
>    hotspot_gc_shenandoah
>    hotspot_serviceability
>    vmTestbase/nsk/jdb
>    manual test: jhsdb hsdb
>    on Linux x64
> 
>    Passed submit test.
> 
> 
> Thanks,
> 
> -Zhengyu