1 /*
   2  * Copyright (c) 2007, 2020, 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 /*
  26  * @test
  27  * @key stress gc randomness
  28  *
  29  * @summary converted from VM Testbase gc/ArrayJuggle/Juggle01.
  30  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, quick]
  31  *
  32  * @library /vmTestbase
  33  *          /test/lib
  34  * @run driver jdk.test.lib.FileInstaller . .
  35  * @run main/othervm -Xlog:gc=debug:gc.log gc.ArrayJuggle.Juggle01.Juggle01 -gp byteArr -ms low
  36  */
  37 
  38 package gc.ArrayJuggle.Juggle01;
  39 
  40 import nsk.share.test.*;
  41 import nsk.share.gc.*;
  42 import nsk.share.gc.gp.*;
  43 
  44 /**
  45  * This test randomly replaces elements of an array with new
  46  * objects using given garbage producer and memory strategy.
  47  */
  48 public class Juggle01 extends ThreadedGCTest implements GarbageProducerAware, MemoryStrategyAware {
  49         private GarbageProducer garbageProducer;
  50         private MemoryStrategy memoryStrategy;
  51         private Object[] array;
  52         long objectSize;
  53 
  54         private class Juggler implements Runnable {
  55                 public void run() {
  56                         synchronized (this) {
  57                                 int index = LocalRandom.nextInt(array.length);
  58                                 array[index] = garbageProducer.create(objectSize);
  59                         }
  60                 }
  61         }
  62 
  63         protected Runnable createRunnable(int i) {
  64                 return new Juggler();
  65         }
  66 
  67         public void run() {
  68                 log.debug("Garbage producer: " + garbageProducer);
  69                 log.debug("Memory strategy: " + memoryStrategy);
  70                 long memory = runParams.getTestMemory();
  71                 int objectCount = memoryStrategy.getCount(memory);
  72                 objectSize = memoryStrategy.getSize(memory);
  73                 log.debug("Object count: " + objectCount);
  74                 log.debug("Object size: " + objectSize);
  75                 array = new Object[objectCount - 1];
  76                 super.run();
  77         }
  78 
  79         public void setGarbageProducer(GarbageProducer garbageProducer) {
  80                 this.garbageProducer = garbageProducer;
  81         }
  82 
  83         public void setMemoryStrategy(MemoryStrategy memoryStrategy) {
  84                 this.memoryStrategy = memoryStrategy;
  85         }
  86 
  87         public static void main(String[] args) {
  88                 GC.runTest(new Juggle01(), args);
  89         }
  90 }