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