Le 17/03/2010 15:13, Tobias Ivarsson a écrit :
On Wed, Mar 17, 2010 at 12:47 PM, Attila Szegedi <szege...@gmail.com
<mailto:szege...@gmail.com>> wrote:
On 2010.03.17., at 12:06, Christian Thalinger wrote:
> On Wed, 2010-03-17 at 11:54 +0100, Attila Szegedi wrote:
>> Folks,
>>
>> just noticed something strange. Java SE 6 Update 18 Release
Notes at <http://java.sun.com/javase/6/webnotes/6u18.html> list
the following issues as being fixed for that release:
>>
>> 6655638 hotspot compiler2 dynamic languages
need method handles
>> 6655646 hotspot compiler2 dynamic languages
need dynamically linked call sites
>>
>> What does this mean? Certainly it doesn't mean we suddenly got
invokedynamic JVM support in Java 6, does it?
>
> No. As the release notes say:
>
> "6u18 includes version 16.0 of the Java HotSpot Virtual Machine."
>
> HotSpot Express is shipped with JDK 6 and 7 and that's why HotSpot
> contains JSR 292 code. But the JDK does not.
Actually, that was exactly what I asked - I worded it carefully to
say "JVM", not "JRE". So, the HotSpot JVM in there does ship with
the JSR-292 bits, it's just that none of the java.dyn.* classes
are in rt.jar, so the functionality is essentially dormant as
there's no API entry point.
Hm... how long before someone gets an idea? :-)
Ooo... that gives me an idea ;-)
I'm pretty sure everyone on this list also got this idea: putting a
jar containing the java.dyn stuff on the bootclasspath should give us
invokedynamic support...
I haven't tried it, there might be other issues preventing it, I just
couldn't resist the "how long before someone gets an idea?" trap you
set...
/Tobias
Don't forget to set some flags when starting the VM :)
-server -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic
Rémi
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