Affected tests:
serviceability/tmtools/jstat/GcCauseTest01.java

Failure:
----------System.err:(21/1366)----------
java.lang.NoClassDefFoundError: jdk/test/lib/Platform
at common.TmTool.adjustForTestJava(TmTool.java:63)
at common.TmTool.<init>(TmTool.java:41)
at utils.JstatGcCauseTool.<init>(JstatGcCauseTool.java:34)
at GcCauseTest01.main(GcCauseTest01.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.lang.Thread.run(java.base@9-internal/Thread.java:843)
Caused by: java.lang.ClassNotFoundException: jdk.test.lib.Platform
at jdk.internal.loader.BuiltinClassLoader.loadClass(java.base@9-internal/BuiltinClassLoader.java:366)
at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(java.base@9-internal/ClassLoaders.java:184)
at java.lang.ClassLoader.loadClass(java.base@9-internal/ClassLoader.java:419)
... 10 more

JavaTest Message: Test threw exception: java.lang.NoClassDefFoundError: jdk/test/lib/Platform
JavaTest Message: shutting down test