1 /*
   2  * Copyright (c) 2014, 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 8038491
  26  * @summary Crash in ZipFile.read() when ZipFileInputStream is shared between threads
  27  * @library /lib/testlibrary
  28  * @build jdk.testlibrary.FileUtils
  29  * @run main MultiThreadedReadTest
  30  * @key randomness
  31  */
  32 
  33 import java.io.File;
  34 import java.io.FileOutputStream;
  35 import java.io.InputStream;
  36 import java.nio.file.Paths;
  37 import java.util.Random;
  38 import java.util.zip.ZipEntry;
  39 import java.util.zip.ZipFile;
  40 import java.util.zip.ZipOutputStream;
  41 import jdk.testlibrary.FileUtils;
  42 
  43 public class MultiThreadedReadTest extends Thread {
  44 
  45     private static final int NUM_THREADS = 10;
  46     private static final String ZIPFILE_NAME = "large.zip";
  47     private static final String ZIPENTRY_NAME = "random.txt";
  48     private static InputStream is = null;
  49 
  50     public static void main(String args[]) throws Exception {
  51         createZipFile();
  52         try (ZipFile zf = new ZipFile(new File(ZIPFILE_NAME))) {
  53             is = zf.getInputStream(zf.getEntry(ZIPENTRY_NAME));
  54             Thread[] threadArray = new Thread[NUM_THREADS];
  55             for (int i = 0; i < threadArray.length; i++) {
  56                 threadArray[i] = new MultiThreadedReadTest();
  57             }
  58             for (int i = 0; i < threadArray.length; i++) {
  59                 threadArray[i].start();
  60             }
  61             for (int i = 0; i < threadArray.length; i++) {
  62                 threadArray[i].join();
  63             }
  64         } finally {
  65             FileUtils.deleteFileIfExistsWithRetry(Paths.get(ZIPFILE_NAME));
  66         }
  67     }
  68 
  69     private static void createZipFile() throws Exception {
  70         try (ZipOutputStream zos =
  71             new ZipOutputStream(new FileOutputStream(ZIPFILE_NAME))) {
  72 
  73             zos.putNextEntry(new ZipEntry(ZIPENTRY_NAME));
  74             StringBuilder sb = new StringBuilder();
  75             Random rnd = new Random();
  76             for(int i = 0; i < 1000; i++) {
  77                 // append some random string for ZipEntry
  78                 sb.append(Long.toString(rnd.nextLong()));
  79             }
  80             byte[] b = sb.toString().getBytes();
  81             zos.write(b, 0, b.length);
  82         }
  83     }
  84 
  85     @Override
  86     public void run() {
  87         try {
  88             while (is.read() != -1) { }
  89         } catch (Exception e) {
  90             // Swallow any Exceptions (which are expected) - we're only interested in the crash
  91         }
  92     }
  93 }