On Win64 debug builds the test serviceability/jvmti/HeapMonitor/MyPackage/HeapMonitorEventOnOffTest.java fails (sometimes?) with the following output:

command: main -agentlib:HeapMonitorTest MyPackage.HeapMonitorEventOnOffTest
reason: User specified action: run main/othervm/native -agentlib:HeapMonitorTest MyPackage.HeapMonitorEventOnOffTest
Mode: othervm [/othervm specified]
elapsed time (seconds): 15.863
----------configuration:(0/0)----------
----------System.out:(0/0)----------
----------System.err:(15/1053)----------
java.lang.RuntimeException: Statistics should be null to begin with.
at MyPackage.HeapMonitor.allocateAndCheckFrames(HeapMonitor.java:192)
at MyPackage.HeapMonitor.allocateAndCheckFrames(HeapMonitor.java:225)
at MyPackage.HeapMonitorEventOnOffTest.main(HeapMonitorEventOnOffTest.java:39)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:835)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Statistics should be null to begin with.
JavaTest Message: shutting down test

Briefly looking through the shared library test code showed that the relevant "global_event_storage" and "second_global_event_storage" statics do not seem to be initialized anywhere.

I.e. looks like a test issue.