New candidate JEP: 371: Hidden Classes

[Thomas Stüfe]

On Sat, Jan 25, 2020 at 6:09 PM Mandy Chung <mandy.chung at oracle.com> wrote:

>
>
> On 1/24/20 9:15 PM, Bernd Eckenfels wrote:
> > Hello,
> >
> > I wonder will this (weak class) be useful for reflective method
> > accessors and even be able to reduce/remove the need of
> > jdk.internal.reflect.DelegatingClassLoaders? If so, that would be a good
> > example to mention in the JEP (it only mentions Proxies).
>
> The other alternative is to change core reflection to use MethodHandle
> where Peter Levart has a prototype:
>     https://bugs.openjdk.java.net/browse/JDK-6824466
>
> This would help the reflective support for inline classes and
> new VM/language feature such that adding support in MethodHandle
> will work both both.
>
>
Oh this is neat. We would also save Metaspace since we would not need
accessor classes and their loaders. Also reduces Metaspace fragmentation.

> (And I was really surprised to see Nashorn mentioned after it is
> > deprecated, even when it is certainly a good Test bed).
>
> Yes Roger brought that up too. It can be taken out.
>
> thanks
> Mandy
>
> > Gruss
> > Bernd
> >
> >
> > --
> > http://bernd.eckenfels.net
> > ------------------------------------------------------------------------
> > *Von:* core-libs-dev <core-libs-dev-bounces at openjdk.java.net> im
> Auftrag
> > von David Holmes <david.holmes at oracle.com>
> > *Gesendet:* Friday, January 24, 2020 11:56:07 PM
> > *An:* hotspot-dev developers <hotspot-dev at openjdk.java.net>;
> > core-libs-dev Libs <core-libs-dev at openjdk.java.net>
> > *Betreff:* Fwd: New candidate JEP: 371: Hidden Classes
> > FYI.
> >
> > Cheers,
> > David
>