1 /*
   2  * Copyright (c) 2004, 2018, 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  * @key stress gc
  27  *
  28  * @summary converted from VM Testbase gc/gctests/PhantomReference/PhantomReferenceTest.
  29  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit]
  30  * VM Testbase readme:
  31  * DESCRIPTION
  32  * Test that verifies the PhantomReference handling in JRockit.
  33  *
  34  * COMMENTS
  35  * This test was ported from JRockit test suite.
  36  *
  37  * @library /vmTestbase
  38  *          /test/lib
  39  * @run driver jdk.test.lib.FileInstaller . .
  40  * @run main/othervm
  41  *      -XX:-UseGCOverheadLimit
  42  *      gc.gctests.PhantomReference.PhantomReferenceTest.PhantomReferenceTest
  43  */
  44 
  45 package gc.gctests.PhantomReference.PhantomReferenceTest;
  46 
  47 import gc.gctests.PhantomReference.PRHelper;
  48 import gc.gctests.PhantomReference.PhantomHelper;
  49 import java.lang.ref.ReferenceQueue;
  50 import java.util.ArrayList;
  51 import java.util.HashMap;
  52 import java.util.Random;
  53 import nsk.share.TestFailure;
  54 import nsk.share.gc.GC;
  55 import nsk.share.gc.GCTestBase;
  56 import nsk.share.gc.gp.GarbageUtils;
  57 import nsk.share.test.Stresser;
  58 
  59 /**
  60  * Tests for the PhantomReference handling in JRockit.
  61  */
  62 public class PhantomReferenceTest extends GCTestBase {
  63 
  64     /**
  65      * Test that verifies the PhantomReference handling in JRockit.
  66      *
  67      * @return success if all phantom references were enqueued
  68      */
  69     public final void run() {
  70         long seed;
  71         int minSize;
  72         int maxSize;
  73         int nrOfObjs;
  74         int sleepTime;
  75         long maxWaitTime;
  76 
  77 
  78         seed = runParams.getSeed();
  79         minSize = 2048;
  80         maxSize = 32768;
  81         nrOfObjs = 1000;
  82         sleepTime = 10000;
  83         maxWaitTime = 30000;
  84 
  85         Random rndGenerator = new Random(seed);
  86         long multiplier = maxSize - minSize;
  87         ReferenceQueue rq = new ReferenceQueue();
  88         HashMap hmHelper = new HashMap();
  89         ArrayList alPhantomRefs = new ArrayList();
  90 
  91         for (int i = 0; i < nrOfObjs; i++) {
  92             int allocationSize = ((int) (rndGenerator.nextDouble()
  93                     * multiplier)) + minSize;
  94             byte[] tmp = new byte[allocationSize];
  95             Integer ik = new Integer(tmp.hashCode());
  96             if (hmHelper.containsKey(ik)) {
  97                 PhantomHelper ph = (PhantomHelper) hmHelper.get(ik);
  98                 ph.increaseHashCounter();
  99                 hmHelper.put(ik, ph);
 100             } else {
 101                 hmHelper.put(ik, new PhantomHelper(tmp.hashCode()));
 102             }
 103 
 104             PRHelper prh = new PRHelper(tmp, rq);
 105             prh.setReferentHashCode(tmp.hashCode());
 106             alPhantomRefs.add(prh);
 107             prh = null;
 108             tmp = null;
 109         }
 110 
 111         Stresser stresser = new Stresser(runParams.getStressOptions());
 112         stresser.start(0);
 113         GarbageUtils.eatMemory(stresser);
 114         if (!stresser.continueExecution()) {
 115             return; //we couldn't be sure that FullGC is triggered
 116         }
 117         String retInfo = PhantomHelper.checkAllHashCodes(
 118                 rq, hmHelper, maxWaitTime);
 119         if (retInfo != null) {
 120             alPhantomRefs.clear();
 121             hmHelper.clear();
 122             throw new TestFailure(retInfo);
 123         }
 124 
 125         // Make sure the ArrayList:s are live at the end of the test
 126         // to make sure that the references gets enqueued.
 127         alPhantomRefs.clear();
 128         hmHelper.clear();
 129 
 130         alPhantomRefs = null;
 131         hmHelper = null;
 132     }
 133 
 134     public static void main(String[] args) {
 135         GC.runTest(new PhantomReferenceTest(), args);
 136     }
 137 }