RFR: 8215395: Allow null oops in Dictionary and JNIHandle verification

[Per Liden]

Thanks Erik!

/Per

On 12/14/18 11:27 AM, Erik Österlund wrote:
> Hi Per,
> 
> Looks good.
> 
> Thanks,
> /Erik
> 
> On 2018-12-14 09:18, Per Liden wrote:
>> JDK-8214784 adjusted the Dictionary and JNIHandle verification, but 
>> failed to take into account that these oops can be null. We should be 
>> using oopDesc::is_oop_or_null() here rather than just oopDesc::is_oop().
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8215395
>> Webrev: http://cr.openjdk.java.net/~pliden/8215395/webrev.0
>>
>> /Per
>