Add MemberName finalizer to mark clazz for MemberName list pruning

This prevents a memory leak in the maintenance of per-class lists used
to find affected MemberName objects in case of class redefinition.

src/java.base/share/classes/java/lang/invoke/MemberName.java

@@ -23,6 +23,12 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2024, 2024 All Rights Reserved
+ * ===========================================================================
+ */
+
 package java.lang.invoke;
 
 import sun.invoke.util.BytecodeDescriptor;
@@ -1196,4 +1202,11 @@ private static MemberName[] newMemberBuffer(int length) {
  return buf;
  }
  }
+
+ @Override
+ protected void finalize() {
+ if (null != clazz) {
+ MethodHandleNatives.markClassForMemberNamePruning(clazz);
+ }
+ }
 }

src/java.base/share/classes/java/lang/invoke/MethodHandleNatives.java

@@ -23,6 +23,12 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2024, 2024 All Rights Reserved
+ * ===========================================================================
+ */
+
 package java.lang.invoke;
 
 import jdk.internal.access.JavaLangAccess;
@@ -690,4 +696,9 @@ static Object classData(Class<?> c) {
  UNSAFE.ensureClassInitialized(c);
  return JLA.classData(c);
  }
+
+ /**
+ * Inform the VM that a MemberName belonging to class c has been collected.
+ */
+ static native void markClassForMemberNamePruning(Class<?> c);
 }