1 /*
   2  * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25    @bug 4260284
  26    @summary Test if DataOutputStream will overcount written field.
  27 */







  28 
  29 import java.io.*;
  30 
  31 public class WriteUTF {
  32     public static void main(String[] args) throws Exception {

  33         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  34         DataOutputStream dos = new DataOutputStream(baos);
  35         dos.writeUTF("Hello, World!");  // 15
  36         dos.flush();
  37         if  (baos.size() != dos.size())
  38             throw new RuntimeException("Miscounted bytes in DataOutputStream.");
  39     }





















  40 }

   1 /*
   2  * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* @test
  25  * @bug 4260284 8219196
  26  * @summary Test if DataOutputStream will overcount written field.
  27  * @requires os.maxMemory > 4g
  28  * @run testng/othervm -Xmx4g WriteUTF
  29  */
  30 
  31 import java.io.ByteArrayOutputStream;
  32 import java.io.DataOutputStream;
  33 import java.io.IOException;
  34 import java.io.UTFDataFormatException;
  35 
  36 import org.testng.annotations.Test;
  37 
  38 public class WriteUTF {
  39     @Test
  40     public static void overcountWrittenField() throws IOException {
  41         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  42         DataOutputStream dos = new DataOutputStream(baos);
  43         dos.writeUTF("Hello, World!");  // 15
  44         dos.flush();
  45         if  (baos.size() != dos.size())
  46             throw new RuntimeException("Miscounted bytes in DataOutputStream.");
  47     }
  48 
  49     private static void writeUTF(int size) throws IOException {
  50         // this character gives 3 bytes when encoded using UTF-8
  51         String s = "\u0800".repeat(size);
  52         ByteArrayOutputStream bos = new ByteArrayOutputStream();
  53         DataOutputStream dos = new DataOutputStream(bos);
  54         dos.writeUTF(s);
  55     }
  56 
  57     @Test(expectedExceptions = UTFDataFormatException.class)
  58     public void utfDataFormatException() throws IOException {
  59         writeUTF(1 << 16);
  60     }
  61 
  62     // Without 8219196 fix, throws ArrayIndexOutOfBoundsException instead of
  63     // expected UTFDataFormatException. Requires 4GB of heap (-Xmx4g) to run
  64     // without throwing an OutOfMemoryError.
  65     @Test(expectedExceptions = UTFDataFormatException.class)
  66     public void arrayIndexOutOfBoundsException() throws IOException {
  67         writeUTF(Integer.MAX_VALUE / 3 + 1);
  68     }
  69 }