RFR (S): 8188919: Generalize GC thread suspend/resume at safepoints

[Per Liden]

Looks good!

/Per

On 2017-10-09 17:35, Erik Österlund wrote:
> Hi,
>
> When we synchronize/unsynchronize safepoints, we make sure to perform
> corresponding suspend/resume calls to GC-specific concurrent workers
> that may interfere with the safepoint. This is currently done by dumping
> GC-specific callbacks right in SafepointSynchronize::begin() and
> SafepointSynchronize::end(). The purpose with this cleanup is to hide
> this behind a general interface on CollectedHeap instead.
>
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8188919/webrev.00/
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8188919
>
> Thanks,
> /Erik