RFR (S) 8214972: Uses of klass_holder() except GC need to apply GC barriers

[coleen.phillimore at oracle.com]

On 12/6/18 10:29 PM, dean.long at oracle.com wrote:
> It looks like we no longer use java_mirror() for is_unsafe_anonymous() 
> classes?

Hi Dean,  I'm glad you looked at this.  The ClassLoaderData::_holder is 
the java mirror now, so we only have to look at that, and mark it for 
the concurrent collectors.

Coleen

>
> dl
>
>
> On 12/6/18 12:47 PM, coleen.phillimore at oracle.com wrote:
>> Summary: Fix klass_holder() and make all callers use it, remove 
>> holder_phantom().*
>>
>> *This removes the confusion about which one to use, except for GC, 
>> who has to know.
>>
>> open webrev at http://cr.openjdk.java.net/~coleenp/8214972.01/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8214972
>>
>> Ran tier1-3 tests.
>>
>> Thanks,
>> Coleen
>> **
>