src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/MetaspaceWrapperObject.java

@@ -21,14 +21,29 @@
  * questions.
  */
 package jdk.vm.ci.hotspot;
 
 /**
- * A tag interface indicating that this type is a wrapper around a HotSpot metaspace object.
+ * A tag interface indicating that this type is a wrapper around a HotSpot metaspace object that
+ * requires GC interaction to keep alive.
  *
  * It would preferable if this were the base class containing the pointer but that would require
  * mixins since most of the wrapper types have complex supertype hierarchies.
  */
 interface MetaspaceWrapperObject {
 
     long getMetaspacePointer();
+
+    /**
+     * Check if this object is properly registered for metadata tracking. All classes which
+     * implement this interface must be registered with the
+     * {@link HotSpotJVMCIMetaAccessContext#add} unless they are kept alive through other means.
+     * Currently the only type which doesn't require explicit registration is
+     * {@link HotSpotResolvedObjectTypeImpl} since it's kept alive by references to the
+     * {@link Class}.
+     *
+     * @return true if this object is properly registered for meta data tracking.
+     */
+    default boolean isRegistered() {
+        return HotSpotJVMCIRuntime.runtime().metaAccessContext.isRegistered(this);
+    }
 }