RFR: 8191861: Move and refactor hSpaceCounters

[Per Liden]

Looks good!

/Per

On 2017-11-24 14:38, Stefan Karlsson wrote:
> Hi all,
>
> Please review this patch to move and refactor HSpaceCounters.
>
> http://cr.openjdk.java.net/~stefank/8191861/webrev.01
> https://bugs.openjdk.java.net/browse/JDK-8191861
>
> The patch moves hSpaceCounters.hpp/cpp out from gc/g1 into gc/shared, so
> that it can be reused by other GCs.
>
> The patch also removes the dependency between HSpaceCounters and
> GenerationCounters. The passed in GenerationCounters object was only
> used to provide the name_space of the perf counter. This patch changes
> G1 to explicitly pass in the name_space string instead of the
> GenerationCounters.
>
> This patch builds upon these two patches:
>
> http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-November/029267.html
>
>
> http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-November/029268.html
>
>
> Thanks,
> StefanK