RFR 8156485 MethodHandles.varHandleExactInvoker should perform exact checks

[Vladimir Ivanov]

Looks good.

Best regards,
Vladimir Ivanov

PS: regarding naming, makeVarHandleMethodInvoker is shorter and as 
informative. Since there are only 2 flavors of invokers for VarHandles 
(for MHs there are also basic invokers), there's no need to explicitly 
mention the modes in method names.

On 5/10/16 4:36 PM, Paul Sandoz wrote:
> Hi,
>
> Please review:
>
>   http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8156486-varHandleExactInvoker/webrev/
>
> A bug slipped in with recent VarHandle implementation improvements, and this was not caught by relevant tests. The MethodHandle returned from MethodHandles.varHandleExactInvoker performed an incorrect match using erased signatures. Ooops.
>
> I fixed this by consolidating the lambda form generation for exact and generic VH invokers.
>
> The tests are also updated, primarily to VarHandleTestMethod* (changes to other areas are minor clean ups) to correctly test the 4 ways to obtain a MethodHandle to a VarHandle access mode method, and to correctly differentiate between testing exact and generic invocation.
>
> Thanks,
> Paul.
>