Code review Feedback from Chris Plummer:
http://mail.openjdk.java.net/pipermail/serviceability-dev/2020-March/030868.html

There are some places in libjdwp that need to be fixed. I spoke to Serguei about those this afternoon. Basically the convertSignatureToClassname() function needs to be fixed to handle hidden classes. Without the fix classname filtering will have problems if the filter contains a pattern with a '/' to filter on hidden classes. Also CLASS_UNLOAD events will not properly convert hidden class names. We also need tests for these cases. I think these are all things that can be addressed later.