RFR: Make Shenandoah string deduplication CDS aware

[Zhengyu Gu]

Well, it looks like Shenandoah does not have shared string archive support:

[0.021s][info][cds] Cached heap data from the CDS archive is being 
ignored. UseG1GC, UseCompressedOops and UseCompressedClassPointers are 
required.

So, I would like to withdraw this patch and look into adding the support 
first.

Thanks,

-Zhengyu


On 05/09/2018 08:07 AM, Zhengyu Gu wrote:
> Following g1's string deduplication, we should also populate archived 
> string to string deduplication table.
> 
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/dedup-cds/webrev.00/
> 
> Test:
>    hotspot_gc_shenandoah + new test on Linux x64 (release + fastdebug)
> 
> 
> Thanks,
> 
> -Zhengyu