RFR (L): 7054512: Compress class pointers after perm gen removal

[Coleen Phillimore]

There's code in nmethod.cpp that iterates over these pointers and makes 
sure that the class_loader associated with this metadata is added to the 
oop section of the nmethod.   This is so the class loader isn't unloaded 
and metadata deallocated.

I think that's the main reason we save it when we're generating code in 
the oopRelocation area.  There might be other reasons but I don't know 
offhand.

Coleen

On 9/20/2012 3:27 PM, Vladimir Kozlov wrote:
> This look good.
>
> Coleen, why we need relocation for metadata pointers?
>
> Thanks,
> Vladimir
>
> Roland Westrelin wrote:
>> compilers and SA support for compressed klass pointers.
>>
>> http://cr.openjdk.java.net/~roland/7054512/webrev.00/
>>
>> Roland.