7156085: ArrayIndexOutOfBoundsException throws in UTF8Reader of SAXParser

Summary: improve support for supplementary characters
Reviewed-by: joehw

test/javax/xml/jaxp/testng/parse/jdk7156085/UTF8ReaderBug.java

+/*
+ * Copyright 2014 Google, Inc.  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.
+ */
+
+package parse.jdk7156085;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+import org.testng.annotations.Test;
+
+/**
+ * JDK-7156085: ArrayIndexOutOfBoundsException throws in UTF8Reader of SAXParser
+ * https://bugs.openjdk.java.net/browse/JDK-7156085
+ *
+ * XERCESJ-1257: buffer overflow in UTF8Reader for characters out of BMP
+ * https://issues.apache.org/jira/browse/XERCESJ-1257
+ */
+public class UTF8ReaderBug {
+    @Test
+    public void shouldAcceptSupplementaryCharacters() throws Throwable {
+        StringBuilder b = new StringBuilder("<xml>");
+        for(int i = 5; i < 8223; i++) {
+            b.append(' ');
+        }
+        // Add surrogate characters which overflow the buffer. This shows the need to place an
+        // overflow check at --
+        // com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:544)
+        b.append("\uD835\uDC37");
+        b.append("</xml>");
+        sendToParser(b.toString());
+    }
+
+    private static void sendToParser(String b) throws Throwable {
+        byte[] input = b.getBytes("UTF-8");
+        ByteArrayInputStream in = new ByteArrayInputStream(input);
+
+        SAXParserFactory  spf = SAXParserFactory.newInstance();
+        SAXParser p = spf.newSAXParser();
+        p.parse(new InputSource(in), new DefaultHandler());
+    }
+}