RFR (S) 8202447: Fix unloading_occurred to mean unloading_occurred

[serguei.spitsyn at oracle.com]

Hi Coleen,

The fix looks good to me.

Thanks,
Serguei


On 5/1/18 12:24, coleen.phillimore at oracle.com wrote:
> Summary: nmethod unloading does not need to test for jvmti to set 
> unloading_occurred, nor do we need to clean weak Klasses in metadata 
> if unloading does not occur.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8202447.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8202447
>
> Tested with mach5 hs-tier1-4, rerunning hs-tier3.  Kitchensink 24 
> hours, and runThese with all 4 GCs.
>
> Thanks,
> Coleen