8209920: runtime/logging/RedefineClasses.java fail with OOME with ZGC

[Leonid Mesnik]

Hi 

Could you please review following fix. I think that fix could be considered as trivial. So I would like to push it once I get Review to avoid failures in tier3.
bug: https://bugs.openjdk.java.net/browse/JDK-8209920 <https://bugs.openjdk.java.net/browse/JDK-8209920>
diff:

diff -r 9d01ad46daef test/hotspot/jtreg/runtime/logging/RedefineClasses.java
--- a/test/hotspot/jtreg/runtime/logging/RedefineClasses.java   Fri Aug 24 15:49:21 2018 -0400
+++ b/test/hotspot/jtreg/runtime/logging/RedefineClasses.java   Fri Aug 24 13:23:17 2018 -0700
@@ -26,6 +26,7 @@
  * @bug 8197901 8209758
  * @summary Redefine classes with enabling logging to verify Klass:external_name() during GC.
  * @comment This test is simplified version of runtime/RedefineTests/RedefineRunningMethods.java.
+ * @requires vm.opt.final.ClassUnloading
  * @library /test/lib
  * @modules java.compiler
  *          java.instrument


Leonid
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