OpenJDK code review request for jmethodID and JNI itable cache race fixes (6419370)

[Daniel D. Daugherty]

Greetings,

I'm looking for a couple of OpenJDK code reviewers for my fix to
the following bug:

    6419370 4/4 new jmethodID code has tiny holes in synchronization

The synopsis is a bit misleading since two different caches are
involved:

    - the jmethodID cache
    - the JNI itable index cache

Both of these caches are used by the regular system and when JVM/TI
is used so this code is applicable outside my usual Serviceability
arena. That's why this code review request is so wide...

Here is the URL for the OpenJDK code review round 1 webrev:

    http://cr.openjdk.java.net/~dcubed/6419370-webrev/1-open/

I've updated the bug with descriptions of the races involved:

     http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6419370

See Evaluation note #3 for a walk through that refers to both
old and new code.

I'm targeting this fix for HSX-17-B02 so I'd like to hear back
from at least one reviewer in a week or so...

Thanks, in advance, for any feedback!

Dan