RFR (S) 8218851: JVM crash in custom classloader stress test, JDK 12 & 13

[coleen.phillimore at oracle.com]

Thanks, Charlie!  Thanks for the crazy test.
Coleen

On 2/14/19 4:30 PM, charlie hunt wrote:
> Not an official "Reviewer".
>
> Looks good, and can confirm it fixes the issue I observed. :-)
>
> Charlie
>
> On 2/14/19 10:58 AM, coleen.phillimore at oracle.com wrote:
>> Summary: Handle NULL and unloaded constraint class in loader 
>> constraint table, also cope with unloaded but not cleaned out klass 
>> in loader constraint entries.
>>
>> Tested overnight with the application that caused the crash. Tested 
>> with hs tier1-6.   Tested JCKs with ZGC.
>>
>> open webrev at 
>> http://cr.openjdk.java.net/~coleenp/2019/8218851.01/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8218851
>>
>> Thanks,
>> Coleen