test/jdk/javax/imageio/plugins/jpeg/CrashAfterDispose.java

/*
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 * 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 4660047
 * @summary Tests if the JPEG reader/writer crashes the VM if certain methods
 *          are called after a call to dispose()
 */

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;

public class CrashAfterDispose {

    public static void main(String[] args) throws IOException {
        InputStream bais = new ByteArrayInputStream(new byte[100]);
        ImageInputStream iis = ImageIO.createImageInputStream(bais);

        // find the JPEG reader
        ImageReader reader = null;
        Iterator readers = ImageIO.getImageReadersByFormatName("jpeg");
        if (readers.hasNext()) {
            reader = (ImageReader)readers.next();
        } else {
            throw new RuntimeException("Unable to find a reader!");
        }

        // dispose the reader, then poke and prod it... the reader should
        // throw exceptions (which will be caught by this test), but it
        // should not crash the VM
        reader.dispose();

        try {
            reader.setInput(iis);
        } catch (IllegalStateException e) {
        }

        try {
            reader.read(0);
        } catch (IllegalStateException e) {
        }

        try {
            reader.abort();
        } catch (IllegalStateException e) {
        }

        try {
            reader.reset();
        } catch (IllegalStateException e) {
        }

        try {
            reader.dispose();
        } catch (IllegalStateException e) {
        }

        // find the JPEG writer
        ImageWriter writer = null;
        Iterator writers = ImageIO.getImageWritersByFormatName("jpeg");
        if (writers.hasNext()) {
            writer = (ImageWriter)writers.next();
        } else {
            throw new RuntimeException("Unable to find a writer!");
        }

        // set up output stream
        OutputStream baos = new ByteArrayOutputStream();
        ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
        BufferedImage bi = new BufferedImage(10, 10,
                                             BufferedImage.TYPE_INT_RGB);

        // dispose the writer, then poke and prod it... the writer should
        // throw exceptions (which will be caught by this test), but it
        // should not crash the VM
        writer.dispose();

        try {
            writer.setOutput(ios);
        } catch (IllegalStateException e) {
        }

        try {
            writer.write(bi);
        } catch (IllegalStateException e) {
        }

        try {
            writer.abort();
        } catch (IllegalStateException e) {
        }

        try {
            writer.reset();
        } catch (IllegalStateException e) {
        }

        try {
            writer.dispose();
        } catch (IllegalStateException e) {
        }
    }
}