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

[David Holmes]

Hi Coleen,

On 15/02/2019 2:58 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.

Pardon my ignorance but how can an unloaded class still be involved in a 
loader constraint?

Thanks,
David

> 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