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• -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES
  Boolean value, default value is `false`
  If true dump class files generated for lambda forms and derived value types into a directory named DUMP_CLASS_FILES under the current directory
• -Djdk.lang.reflect.DVT
  Boolean value, default value is `false`
  If true, allow reflection on derived value types.  This is a temporary workaround until existing hotspot tests convert to VCC/DVT and use reflection on VCC only.
• -Dvalhalla.enableValueLambdaForms
  Boolean value, default value is `true`
  If true then lambda forms with value types in their signature will use the Q type __Value and value-type specific byte code will be generated.
• -Dvalhalla.dumpProxyClasses

           Boolean value, default value is `false`

           If true, dumps MVT lambda forms.

• -Dvalhalla.enablePoolPatches
  Boolean value, default value is `false`
  If true and if "valhalla.enableValueLambdaForms" is true then lambda forms with value types in their signature will generate byte code with constant pool patching where appropriate
• -Dvalhalla.mangleClassInfo
  Boolean value, default value is `false`
  Ensure value type names are distinguishable a reference class names by prepending ";Q" to the value type name.
  Should be used in conjunction with javac flag "mangleClassInfo".

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