RFR 8003421: NPG: Move oops out of InstanceKlass into mirror

[David Holmes]

On 21/05/2013 2:50 PM, Dean Long wrote:
> Right, unless there is a way to inject them conditionally.

You can inject them conditionally based on the JRE version, but then why 
bother moving to the Java level if you will still need the code in the VM ?

> On 5/20/2013 9:02 PM, Ioi Lam wrote:
>> But if you move these fields into Class.java (in JDK8), then hsx25
>> will not run on JDK7 anymore, unless these fields are also added in
>> Class.java in JDK7.

As I understand it hs25 is already limited in the versions of jdk7 that 
it can run in.

David
-----

>>
>> - Ioi
>>
>> On 05/20/2013 05:42 PM, Dean Long wrote:
>>> It seems like you could take this opportunity to make these declared
>>> fields of java.lang.Class,
>>> allowing, for example, getProtectionDomain0() to be a simple Java
>>> method instead of a native method.
>>>
>>> dl
>>>
>>> On 05/20/2013 03:39 PM, Coleen Phillimore wrote:
>>>> Summary: Inject protection_domain, signers, init_lock into
>>>> java_lang_Class
>>>>
>>>> Net footprint change is zero except that these fields are in Java
>>>> heap rather than metaspace.  This helps a little with InstanceKlass
>>>> size which is in fixed size space with UseCompressedKlassPointers.
>>>> Included serviceability because there were SA changes to code that I
>>>> don't know is used.
>>>>
>>>> Future work is to remove the signers field and the unused
>>>> SetProtectionDomain function.
>>>>
>>>> open webrev at http://cr.openjdk.java.net/~coleenp/8003421/
>>>> bug link at http://bugs.sun.com/view_bug.do?bug_id=8003421
>>>>
>>>> Tested with vm.quick.testlist, JPRT, jtreg java/security tests and
>>>> jck8 tests.
>>>>
>>>> Thanks,
>>>> Coleen
>>>
>>
>