8087312: PropertyMapWrapper.equals should compare className

Reviewed-by: sundar, attila

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/ConstantData.java

@@ -30,6 +30,8 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
+
 import jdk.nashorn.internal.runtime.PropertyMap;
 
 /**
@@ -120,7 +122,7 @@ final class ConstantData {
         private final int hashCode;
 
         public PropertyMapWrapper(final PropertyMap map) {
-            this.hashCode = Arrays.hashCode(map.getProperties());
+            this.hashCode = Arrays.hashCode(map.getProperties()) + 31 * Objects.hashCode(map.getClassName());
             this.propertyMap = map;
         }
 
@@ -131,8 +133,13 @@ final class ConstantData {
 
         @Override
         public boolean equals(final Object other) {
-            return other instanceof PropertyMapWrapper &&
-                    Arrays.equals(propertyMap.getProperties(), ((PropertyMapWrapper) other).propertyMap.getProperties());
+            if (!(other instanceof PropertyMapWrapper)) {
+                return false;
+            }
+            final PropertyMap otherMap = ((PropertyMapWrapper) other).propertyMap;
+            return propertyMap == otherMap
+                    || (Arrays.equals(propertyMap.getProperties(), otherMap.getProperties())
+                        && Objects.equals(propertyMap.getClassName(), otherMap.getClassName()));
         }
     }
 

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/PropertyMap.java

@@ -596,6 +596,15 @@ public final class PropertyMap implements Iterable<Object>, Serializable {
         return properties.getProperties();
     }
 
+    /**
+     * Return the name of the class of objects using this property map.
+     *
+     * @return class name of owner objects.
+     */
+    public String getClassName() {
+        return className;
+    }
+
     /**
      * Prevents the map from having additional properties.
      *

nashorn/test/script/basic/JDK-8087312.js

+/*
+ * Copyright (c) 2015, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8087312: PropertyMapWrapper.equals should compare className
+ *
+ * @test
+ * @run
+ * @fork
+ * @option -Dnashorn.debug=true
+ */
+
+function createObject(type) {
+    // we want to make sure two different object literals with the same keys and types share the same property map.
+    if (type) {
+        return {
+            a: "a",
+            b: 1,
+            c: 0.1
+        }
+    } else {
+        return {
+            a: "x",
+            b: 10,
+            c: 3.4
+        }
+    }
+}
+
+var o1 = createObject(false);
+var o2 = createObject(true);
+Assert.assertTrue(Debug.map(o1) === Debug.map(o2));
+