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/*
* Copyright (c) 1999, 2019, 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.
*/
/* @test
* @bug 4260284 8219196 8223254
* @summary Test if DataOutputStream will overcount written field.
* @requires (sun.arch.data.model == "64" & os.maxMemory >= 4g)
* @run testng/othervm -Xmx4g WriteUTF
*/
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UTFDataFormatException;
import org.testng.annotations.Test;
public class WriteUTF {
@Test
public static void overcountWrittenField() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
dos.writeUTF("Hello, World!"); // 15
dos.flush();
if (baos.size() != dos.size())
throw new RuntimeException("Miscounted bytes in DataOutputStream.");
}
private static void writeUTF(int size) throws IOException {
// this character gives 3 bytes when encoded using UTF-8
String s = "\u0800".repeat(size);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
dos.writeUTF(s);
}
@Test(expectedExceptions = UTFDataFormatException.class)
public void utfDataFormatException() throws IOException {
writeUTF(1 << 16);
}
// Without 8219196 fix, throws ArrayIndexOutOfBoundsException instead of
// expected UTFDataFormatException. Requires 4GB of heap (-Xmx4g) to run
// without throwing an OutOfMemoryError.
@Test(expectedExceptions = UTFDataFormatException.class)
public void arrayIndexOutOfBoundsException() throws IOException {
writeUTF(Integer.MAX_VALUE / 3 + 1);
}
}
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