RFR (S) 8208677: Move inner metaspace cleaning out of class unloading

[Harold David Seigel]

Hi Coleen,

This change looks good.
Any particular reason for changing the logging level from Debug to Trace?

Thanks, Harold

On 8/6/2018 2:47 PM, coleen.phillimore at oracle.com wrote:
> Summary: move to safepoint cleanup actions to do if needed.
>
> This is in support of concurrent class unloading.   See bug 
> description for more details.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8208677.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8208677
>
> Ran mach5 hs-tier1-5, with no failures on Friday.  hs-tier1,2 with 
> expected failures today.
>
> The test/hotspot/jtreg/runtime/RedefineRunningMethods.java and 
> RedefineLeak.java test this code.  Fixed and verified with logging in 
> the first test.
>
> thanks,
> Coleen