1 /* 2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @bug 5092263 26 * @summary GZIPInputStream o GZIPOutputStream === the identity stream 27 * @author Martin Buchholz 28 */ 29 30 // To manually test for uncompressed streams larger than 2GB, do 31 // javac Accordion.java && java -server Accordion 3325349068 32 // javac Accordion.java && java -server Accordion 5470735564 33 34 import java.io.*; 35 import java.util.*; 36 import java.util.zip.GZIPInputStream; 37 import java.util.zip.GZIPOutputStream; 38 39 public class Accordion { 40 private static void readFully(InputStream s, byte[] buf) throws Throwable { 41 int pos = 0; 42 int n; 43 while ((n = s.read(buf, pos, buf.length-pos)) > 0) 44 pos += n; 45 if (pos != buf.length) 46 throw new Exception("Unexpected EOF"); 47 } 48 49 private static volatile Throwable trouble; 50 51 public static void main(String[] args) throws Throwable { 52 if (args.length > 1) 53 throw new Exception("Usage: java Accordion [BYTES]"); 54 55 final long bytes = args.length == 0 ? 10001 : Long.parseLong(args[0]); 56 final int bufsize = 1729; 57 final long count = bytes/bufsize; 58 final PipedOutputStream out = new PipedOutputStream(); 59 final PipedInputStream in = new PipedInputStream(out); 60 final Random random = new Random(); 61 final byte[] data = new byte[1729]; 62 for (int i = 0; i < data.length; i++) 63 data[i] = (byte)random.nextInt(255); 64 System.out.println("count="+count); 65 66 Thread compressor = new Thread() { public void run() { 67 try (GZIPOutputStream s = new GZIPOutputStream(out)) { 68 for (long i = 0; i < count; i++) 69 s.write(data, 0, data.length); 70 } catch (Throwable t) { trouble = t; }}}; 71 72 Thread uncompressor = new Thread() { public void run() { 73 try (GZIPInputStream s = new GZIPInputStream(in)) { 74 final byte[] maybeBytes = new byte[data.length]; 75 for (long i = 0; i < count; i++) { 76 readFully(s, maybeBytes); 77 if (! Arrays.equals(data, maybeBytes)) 78 throw new Exception("data corruption"); 79 } 80 if (s.read(maybeBytes, 0, 1) > 0) 81 throw new Exception("Unexpected NON-EOF"); 82 } catch (Throwable t) { trouble = t; }}}; 83 84 compressor.start(); uncompressor.start(); 85 compressor.join(); uncompressor.join(); 86 87 if (trouble != null) 88 throw trouble; 89 } 90 }