73 lines
2.8 KiB
Java
73 lines
2.8 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8316156
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* @summary Ensure ByteArrayInputStream.transferTo does not cause direct memory
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* to overflow MaxDirectMemorySize
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* @run junit/othervm -XX:MaxDirectMemorySize=5M ChunkedTransferTo
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*/
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import java.io.ByteArrayInputStream;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.nio.channels.Channels;
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import java.nio.channels.FileChannel;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.Arrays;
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import java.util.Random;
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import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
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import static java.nio.file.StandardOpenOption.*;
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import org.junit.jupiter.api.Test;
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public class ChunkedTransferTo {
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// this value must exceed MaxDirectMemorySize
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private static final int SIZE = 10_000_000;
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@Test
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public void byteArrayInputStream() throws IOException {
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byte[] src = new byte[SIZE];
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Random rnd = new Random(System.nanoTime());
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rnd.nextBytes(src);
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try (ByteArrayInputStream bais = new ByteArrayInputStream(src)) {
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Path target = Files.createTempFile("SNA", "FU");
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FileChannel fc = FileChannel.open(target, CREATE, WRITE);
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bais.transferTo(Channels.newOutputStream(fc));
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byte[] dst = new byte[SIZE + 1];
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try (FileInputStream fis = new FileInputStream(target.toFile())) {
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int n = -1;
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if ((n = fis.read(dst)) != SIZE)
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throw new RuntimeException(n + " != " + SIZE);
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}
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Files.delete(target);
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if (!Arrays.equals(src, 0, SIZE, dst, 0, SIZE))
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throw new RuntimeException("Arrays are not equal");
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} catch (OutOfMemoryError oome) {
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throw new RuntimeException(oome);
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}
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}
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}
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