RFR 8154447: Exempt classes under java.util.concurrent from MH.Lookup restrictions

[Martin Buchholz]

Looks good to me.  I'd add a TODO comment.

On Tue, Apr 26, 2016 at 3:01 PM, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> Hi,
>
> Please review:
>
>   http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8154447-mh-lookup-restricted-pkgs/webrev/ <http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8154447-mh-lookup-restricted-pkgs/webrev/>
>   https://bugs.openjdk.java.net/browse/JDK-8154447 <https://bugs.openjdk.java.net/browse/JDK-8154447>
>
> This is a quick fix to allow classes under java.util.concurrent to call MethodHandles.lookup(), and thus unblock the use of such classes using VarHandles.
>
> To verify and ensure we don’t regress i included a simple test.
>
> These fragile checks will be revisited later under another issue.
>
> Paul.