RFR: 8178813: Add test for G1 pre-barrier on dereference of weak JNI handles

[Kim Barrett]

> On May 11, 2017, at 5:34 AM, Per Liden <per.liden at oracle.com> wrote:
> 
> On 2017-05-11 01:39, Kim Barrett wrote:
> [...]
>> It made it easier to test the test, by backing out the fixes being tested and
>> verifying both failure modes.  But I agree it does uglify the test itself, and
>> now that we expected it to always pass, that’s more important.  So fixed.
>> 
>> New webrevs:
>> full: http://cr.openjdk.java.net/~kbarrett/8178813/hotspot.02/
>> incr: http://cr.openjdk.java.net/~kbarrett/8178813/hotspot.02.inc/
>> 
> 
> Still looks good.
> 
> cheers,
> Per

Thanks.