1 /* 2 * Copyright (c) 2005, 2011, 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 * @key randomness 29 */ 30 31 // To manually test for uncompressed streams larger than 2GB, do 32 // javac Accordion.java && java -server Accordion 3325349068 33 // javac Accordion.java && java -server Accordion 5470735564 34 35 import java.io.*; 36 import java.util.*; 37 import java.util.zip.GZIPInputStream; 38 import java.util.zip.GZIPOutputStream; 39 40 public class Accordion { 41 private static void readFully(InputStream s, byte[] buf) throws Throwable { 42 int pos = 0; 43 int n; 44 while ((n = s.read(buf, pos, buf.length-pos)) > 0) 45 pos += n; 46 if (pos != buf.length) 47 throw new Exception("Unexpected EOF"); 48 } 49 50 private static volatile Throwable trouble; 51 52 public static void main(String[] args) throws Throwable { 53 if (args.length > 1) 54 throw new Exception("Usage: java Accordion [BYTES]"); 55 56 final long bytes = args.length == 0 ? 10001 : Long.parseLong(args[0]); 57 final int bufsize = 1729; 58 final long count = bytes/bufsize; 59 final PipedOutputStream out = new PipedOutputStream(); 60 final PipedInputStream in = new PipedInputStream(out); 61 final Random random = new Random(); 62 final byte[] data = new byte[1729]; 63 for (int i = 0; i < data.length; i++) 64 data[i] = (byte)random.nextInt(255); 65 System.out.println("count="+count); 66 67 Thread compressor = new Thread() { public void run() { 68 try (GZIPOutputStream s = new GZIPOutputStream(out)) { 69 for (long i = 0; i < count; i++) 70 s.write(data, 0, data.length); 71 } catch (Throwable t) { trouble = t; }}}; 72 73 Thread uncompressor = new Thread() { public void run() { 74 try (GZIPInputStream s = new GZIPInputStream(in)) { 75 final byte[] maybeBytes = new byte[data.length]; 76 for (long i = 0; i < count; i++) { 77 readFully(s, maybeBytes); 78 if (! Arrays.equals(data, maybeBytes)) 79 throw new Exception("data corruption"); 80 } 81 if (s.read(maybeBytes, 0, 1) > 0) 82 throw new Exception("Unexpected NON-EOF"); 83 } catch (Throwable t) { trouble = t; }}}; 84 85 compressor.start(); uncompressor.start(); 86 compressor.join(); uncompressor.join(); 87 88 if (trouble != null) 89 throw trouble; 90 } 91 }