Merge

Author: GoeLin

make/conf/version-numbers.conf

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2026, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it

src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java

@@ -35,6 +35,13 @@
 
 package java.util.concurrent;
 
+import jdk.internal.misc.Unsafe;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectStreamException;
+import java.io.Serial;
+import java.io.StreamCorruptedException;
 import java.util.AbstractSet;
 import java.util.Collection;
 import java.util.Iterator;
@@ -444,4 +451,38 @@ public Spliterator<E> spliterator() {
         return Spliterators.spliterator
             (al.getArray(), Spliterator.IMMUTABLE | Spliterator.DISTINCT);
     }
+
+    /**
+     * De-serialization without data not supported for this class.
+     */
+    @Serial
+    private void readObjectNoData() throws ObjectStreamException {
+        throw new StreamCorruptedException("Deserialized CopyOnWriteArraySet requires data");
+    }
+
+    /**
+     * Reconstitutes the {@code CopyOnWriteArraySet} instance from a stream
+     * (that is, deserializes it).
+     * @throws StreamCorruptedException if the object read from the stream is invalid.
+     */
+    @Serial
+    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
+        CopyOnWriteArrayList<E> newAl; // Set during the duplicate check
+
+        @SuppressWarnings("unchecked")
+        CopyOnWriteArrayList<E> inAl = (CopyOnWriteArrayList<E>) in.readFields().get("al", null);
+
+        if (inAl == null
+                || inAl.getClass() != CopyOnWriteArrayList.class
+                || (newAl = new CopyOnWriteArrayList<>()).addAllAbsent(inAl) != inAl.size()) {
+            throw new StreamCorruptedException("Content is invalid");
+        }
+
+        final Unsafe U = Unsafe.getUnsafe();
+        U.putReference(
+                this,
+                U.objectFieldOffset(CopyOnWriteArraySet.class, "al"),
+                newAl
+        );
+    }
 }