A couple of tests under nsk/jdi rely on exhausting PermGen to force class unloading. Now that PermGen is no more, this technique instead exhausts native memory (atleast without -XX:MaxMetaspaceSize) leading to both OOM errors and high load on test machines due to intensive swapping.

Affected tests:

nsk/jdi/ClassObjectReference/reflectedType/reflectype002
nsk/jdi/ClassUnloadEvent/className/classname001
nsk/jdi/ClassUnloadEvent/classSignature/signature001
nsk/jdi/ClassUnloadRequest/addClassExclusionFilter/exclfilter001
nsk/jdi/ClassUnloadRequest/addClassFilter/filter001
nsk/jdi/ReferenceType/allFields/allfields003
nsk/jdi/ReferenceType/allMethods/allmethods003
nsk/jdi/ReferenceType/classObject/classobj002
nsk/jdi/ReferenceType/equals/equals002
nsk/jdi/ReferenceType/failedToInitialize/failedtoinit002
nsk/jdi/ReferenceType/fieldByName/fieldbyname003
nsk/jdi/ReferenceType/fields/fields003
nsk/jdi/ReferenceType/hashCode/hashcode002
nsk/jdi/ReferenceType/isAbstract/isabstract002
nsk/jdi/ReferenceType/isInitialized/isinit002
nsk/jdi/ReferenceType/isPrepared/isprepared002
nsk/jdi/ReferenceType/isVerified/isverified002
nsk/jdi/ReferenceType/methodsByName_s/methbyname_s003
nsk/jdi/ReferenceType/methodsByName_ss/methbyname_ss003
nsk/jdi/ReferenceType/methods/methods003
nsk/jdi/ReferenceType/name/name002
nsk/jdi/ReferenceType/sourceName/sourcename002
nsk/jdi/ReferenceType/visibleFields/visibfield003
nsk/jdi/ReferenceType/visibleMethods/visibmethod003