RFR: 8280377: MethodHandleProxies does not correctly invoke default methods with varags [v3]

[Alan Bateman]

On Mon, 24 Jan 2022 23:18:41 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> The MethodHandle of a default method should be made as a fixed arity method handle because it is invoked via Proxy's invocation handle with a non-vararg array of arguments.  On the other hand, the `InvocationHandle::invokeDefault` method  was added in Java 16 to invoke a default method of a proxy instance.  This patch simply converts the implementation to call `InvocationHandle::invokeDefault` instead.
>
> Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix accident argument ordering after edit

Marked as reviewed by alanb (Reviewer).

src/java.base/share/classes/jdk/internal/access/JavaLangReflectAccess.java line 107:

> 105: 
> 106:     public Object invokeDefault(Object proxy, Method method, Object[] args, Class<?> caller)
> 107:         throws Throwable;

Minor nit: add a comment to the method so that it's consistent with the other JLRA methods.

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PR: https://git.openjdk.java.net/jdk/pull/7185