RFR (S) 8232112: MDO extra_data_lock leaks during class unloading

[Erik Österlund]

Hi Coleen

Looks good. Thanks for fixing!

/Erik

On 2019-10-16 15:48, coleen.phillimore at oracle.com wrote:
> Summary: call the MDO destructor during class unloading.
>
> Also moved the other C heap deallocation from method_data to 
> release_C_heap_structures.  Methods won't have method_data unless 
> they're deallocated from the InstanceKlass.  The other paths to 
> deallocate_contents are before the method is called.
>
> Tested with tier1 all Oracle platforms, and tier2-6 on linux-x64.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8232112.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8232112
>
> Thanks,
> Coleen
>
>