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

Paul Sandoz paul.sandoz at oracle.com
Wed Apr 27 00:52:26 UTC 2016

> On 26 Apr 2016, at 15:14, Martin Buchholz <martinrb at google.com> wrote:
> Looks good to me.  I'd add a TODO comment.

Thanks. I have changed the comment to:

// For caller-sensitive MethodHandles.lookup() disallow lookup from
// restricted packages.  This a fragile and blunt approach.
// TODO replace with a more formal and less fragile mechanism
// that does not bluntly restrict packages within java.base from
// looking up MethodHandles or VarHandles.


> 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.

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