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 /**
  25  * @test
  26  * @bug 6348045
  27  * @summary GZipOutputStream/InputStream goes critical(calls JNI_Get*Critical)
  28  * and causes slowness.  This test uses Deflater and Inflater directly.
  29  * @key randomness
  30  */
  31 
  32 import java.io.*;
  33 import java.nio.*;
  34 import java.util.*;
  35 import java.util.zip.*;
  36 
  37 /**
  38  * This test runs Inflater and Defalter in a number of simultaneous threads,
  39  * validating that the deflated & then inflated data matches the original
  40  * data.
  41  */
  42 public class FlaterTest extends Thread {
  43     private static final int DATA_LEN = 1024 * 128;
  44     private static byte[] data;
  45 
  46     // If true, print extra info.
  47     private static final boolean debug = false;
  48 
  49     // Set of Flater threads running.
  50     private static Set flaters =
  51         Collections.synchronizedSet(new HashSet());
  52 
  53     /** Fill in {@code data} with random values. */
  54     static void createData() {
  55         ByteBuffer bb = ByteBuffer.allocate(8);
  56         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  57         for (int i = 0; i < DATA_LEN; i++) {
  58             bb.putDouble(0, Math.random());
  59             baos.write(bb.array(), 0, 8);
  60         }
  61         data = baos.toByteArray();
  62         if (debug) System.out.println("data length is " + data.length);
  63     }
  64 
  65     /** @return the length of the deflated {@code data}. */
  66     private static int getDeflatedLength() throws Throwable {
  67         int rc = 0;
  68         Deflater deflater = new Deflater();
  69         deflater.setInput(data);
  70         deflater.finish();
  71         byte[] out = new byte[data.length];
  72         rc = deflater.deflate(out);
  73         deflater.end();
  74         if (debug) System.out.println("deflatedLength is " + rc);
  75         return rc;
  76     }
  77 
  78     /** Compares given bytes with those in {@code data}.
  79      * @throws Exception if given bytes don't match {@code data}.
  80      */
  81     private static void validate(byte[] buf, int offset, int len) throws Exception {
  82         for (int i = 0; i < len; i++ ) {
  83             if (buf[i] != data[offset+i]) {
  84                 throw new Exception("mismatch at " + (offset + i));
  85             }
  86         }
  87     }
  88 
  89     public static void realMain(String[] args) throws Throwable {
  90         createData();
  91         int numThreads = args.length > 0 ? Integer.parseInt(args[0]) : 5;
  92         new FlaterTest().go(numThreads);
  93     }
  94 
  95     synchronized private void go(int numThreads) throws Throwable {
  96         int deflatedLength = getDeflatedLength();
  97 
  98         long time = System.currentTimeMillis();
  99         for (int i = 0; i < numThreads; i++) {
 100             Flater f = new Flater(deflatedLength);
 101             flaters.add(f);
 102             f.start();
 103         }
 104         while (flaters.size() != 0) {
 105             try {
 106                 Thread.currentThread().sleep(10);
 107             } catch (InterruptedException ex) {
 108                 unexpected(ex);
 109             }
 110         }
 111         time = System.currentTimeMillis() - time;
 112         System.out.println("Time needed for " + numThreads
 113                            + " threads to deflate/inflate: " + time + " ms.");
 114     }
 115 
 116     /** Deflates and inflates data. */
 117     static class Flater extends Thread {
 118         private final int deflatedLength;
 119 
 120         private Flater(int length) {
 121             this.deflatedLength = length;
 122         }
 123 
 124         /** Deflates and inflates {@code data}. */
 125         public void run() {
 126             if (debug) System.out.println(getName() + " starting run()");
 127             try {
 128                 byte[] deflated = DeflateData(deflatedLength);
 129                 InflateData(deflated);
 130             } catch (Throwable t) {
 131                 t.printStackTrace();
 132                 fail(getName() + " failed");
 133             } finally {
 134                 flaters.remove(this);
 135             }
 136         }
 137 
 138         /** Returns a copy of {@code data} in deflated form. */
 139         private byte[] DeflateData(int length) throws Throwable {
 140             Deflater deflater = new Deflater();
 141             deflater.setInput(data);
 142             deflater.finish();
 143             byte[] out = new byte[length];
 144             deflater.deflate(out);
 145             return out;
 146         }
 147 
 148         /** Inflate a byte array, comparing it with {@code data} during
 149          * inflation.
 150          * @throws Exception if inflated bytes don't match {@code data}.
 151          */
 152         private void InflateData(byte[] bytes) throws Throwable {
 153             Inflater inflater = new Inflater();
 154             inflater.setInput(bytes, 0, bytes.length);
 155             int len = 1024 * 8;
 156             int offset = 0;
 157             while (inflater.getRemaining() > 0) {
 158                 byte[] buf = new byte[len];
 159                 int inflated = inflater.inflate(buf, 0, len);
 160                 validate(buf, offset, inflated);
 161                 offset += inflated;
 162             }
 163         }
 164     }
 165 
 166     //--------------------- Infrastructure ---------------------------
 167     static volatile int passed = 0, failed = 0;
 168     static void pass() {passed++;}
 169     static void fail() {failed++; Thread.dumpStack();}
 170     static void fail(String msg) {System.out.println(msg); fail();}
 171     static void unexpected(Throwable t) {failed++; t.printStackTrace();}
 172     static void check(boolean cond) {if (cond) pass(); else fail();}
 173     static void equal(Object x, Object y) {
 174         if (x == null ? y == null : x.equals(y)) pass();
 175         else fail(x + " not equal to " + y);}
 176     public static void main(String[] args) throws Throwable {
 177         try {realMain(args);} catch (Throwable t) {unexpected(t);}
 178         System.out.println("\nPassed = " + passed + " failed = " + failed);
 179         if (failed > 0) throw new AssertionError("Some tests failed");}
 180 }