8017492: Static field in HTML parser affects all applications

Reviewed-by: art

src/share/classes/javax/swing/text/html/parser/ContentModel.java

@@ -170,8 +170,8 @@ public final class ContentModel implements Serializable {
           case '&': {
             Element e = (Element) token;
             if (valSet == null) {
-                valSet = new boolean[Element.maxIndex + 1];
-                val = new boolean[Element.maxIndex + 1];
+                valSet = new boolean[Element.getMaxIndex() + 1];
+                val = new boolean[valSet.length];
                 // All Element instances are created before this ever executes
             }
             if (valSet[e.index]) {

src/share/classes/javax/swing/text/html/parser/Element.java

@@ -28,6 +28,7 @@ package javax.swing.text.html.parser;
 import java.util.Hashtable;
 import java.util.BitSet;
 import java.io.*;
+import sun.awt.AppContext;
 
 /**
  * An element as described in a DTD using the ELEMENT construct.
@@ -51,8 +52,6 @@ class Element implements DTDConstants, Serializable {
     public ContentModel content;
     public AttributeList atts;
 
-    static int maxIndex = 0;
-
     /**
      * A field to store user data. Mostly used to store
      * style sheets.
@@ -68,7 +67,18 @@ class Element implements DTDConstants, Serializable {
     Element(String name, int index) {
         this.name = name;
         this.index = index;
-        maxIndex = Math.max(maxIndex, index);
+        if (index > getMaxIndex()) {
+            AppContext.getAppContext().put(MAX_INDEX_KEY, index);
+        }
+    }
+
+    private static final Object MAX_INDEX_KEY = new Object();
+
+    static int getMaxIndex() {
+        Integer value = (Integer) AppContext.getAppContext().get(MAX_INDEX_KEY);
+        return (value != null)
+                ? value.intValue()
+                : 0;
     }
 
     /**

test/javax/swing/text/html/parser/Test8017492.java

+/*
+ * Copyright (c) 2013, 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.
+ */
+
+import java.util.Vector;
+import javax.swing.text.html.HTML;
+import javax.swing.text.html.HTMLDocument;
+import javax.swing.text.html.HTMLEditorKit;
+import javax.swing.text.html.parser.DTD;
+import javax.swing.text.html.parser.Element;
+import sun.awt.SunToolkit;
+
+/*
+ * @test
+ * @bug 8017492
+ * @run main/othervm Test8017492
+ * @summary Tests for OutOfMemoryError/NegativeArraySizeException
+ * @author Sergey Malenkov
+ */
+
+public class Test8017492 {
+    public static void main(String[] args) throws Exception {
+        Runnable task = new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    SunToolkit.createNewAppContext();
+                    DTD dtd = DTD.getDTD("dtd");
+                    dtd.elements = new Vector<Element>() {
+                        @Override
+                        public synchronized int size() {
+                            return Integer.MAX_VALUE;
+                        }
+                    };
+                    dtd.getElement("element");
+                }
+                catch (Exception exception) {
+                    throw new Error("unexpected", exception);
+                }
+            }
+        };
+        // run task with different AppContext
+        Thread thread = new Thread(new ThreadGroup("$$$"), task);
+        thread.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
+            @Override
+            public void uncaughtException(Thread thread, Throwable throwable) {
+                throwable.printStackTrace();
+                System.exit(1);
+            }
+        });
+        thread.start();
+        thread.join();
+        // add error handling
+        HTMLDocument document = new HTMLDocument() {
+            @Override
+            public HTMLEditorKit.ParserCallback getReader(int pos) {
+                return getReader(pos, 0, 0, null);
+            }
+
+            @Override
+            public HTMLEditorKit.ParserCallback getReader(int pos, int popDepth, int pushDepth, HTML.Tag insertTag) {
+                return new HTMLDocument.HTMLReader(pos, popDepth, pushDepth, insertTag) {
+                    @Override
+                    public void handleError(String error, int pos) {
+                        throw new Error(error);
+                    }
+                };
+            }
+        };
+        // run parser
+        new HTMLEditorKit().insertHTML(document, 0, "<html><body>text", 0, 0, null);
+    }
+}