98 lines
3.4 KiB
Java
98 lines
3.4 KiB
Java
/*
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* Copyright (c) 2013, 2021, 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 7129312
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* @requires (sun.arch.data.model == "64" & os.maxMemory > 4g)
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* @summary BufferedInputStream calculates negative array size with large
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* streams and mark
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* @run main/othervm -Xmx4G -Xlog:gc,gc+heap,gc+ergo+heap -XX:+CrashOnOutOfMemoryError
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-XX:+IgnoreUnrecognizedVMOptions -XX:+G1ExitOnExpansionFailure
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-Xlog:cds=debug
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LargeCopyWithMark
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*/
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import java.io.BufferedInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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public class LargeCopyWithMark {
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static final int BUFF_SIZE = 8192;
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static final int BIS_BUFF_SIZE = Integer.MAX_VALUE / 2 + 100;
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static final long BYTES_TO_COPY = 2L * Integer.MAX_VALUE;
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static {
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assert BIS_BUFF_SIZE * 2 < 0 : "doubling must overflow";
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}
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public static void main(String[] args) throws Exception {
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byte[] buff = new byte[BUFF_SIZE];
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try (InputStream myis = new MyInputStream(BYTES_TO_COPY);
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InputStream bis = new BufferedInputStream(myis, BIS_BUFF_SIZE);
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OutputStream myos = new MyOutputStream()) {
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// will require a buffer bigger than BIS_BUFF_SIZE
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bis.mark(BIS_BUFF_SIZE + 100);
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for (;;) {
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int count = bis.read(buff, 0, BUFF_SIZE);
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if (count == -1)
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break;
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myos.write(buff, 0, count);
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}
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}
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}
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}
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class MyInputStream extends InputStream {
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private long bytesLeft;
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public MyInputStream(long bytesLeft) {
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this.bytesLeft = bytesLeft;
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}
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@Override public int read() throws IOException {
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return 0;
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}
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@Override public int read(byte[] b) throws IOException {
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return read(b, 0, b.length);
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}
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@Override public int read(byte[] b, int off, int len) throws IOException {
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if (bytesLeft <= 0)
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return -1;
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long result = Math.min(bytesLeft, (long)len);
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bytesLeft -= result;
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return (int)result;
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}
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@Override public int available() throws IOException {
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return (bytesLeft > 0) ? 1 : 0;
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}
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}
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class MyOutputStream extends OutputStream {
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@Override public void write(int b) throws IOException {}
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@Override public void write(byte[] b) throws IOException {}
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@Override public void write(byte[] b, int off, int len) throws IOException {}
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}
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