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