1 /*
   2  * Copyright (c) 2007, 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/SoftReference/soft004.
  29  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
  30  *
  31  * @library /vmTestbase
  32  *          /test/lib
  33  * @run driver jdk.test.lib.FileInstaller . .
  34  * @run main/othervm -XX:-UseGCOverheadLimit gc.gctests.SoftReference.soft004.soft004 -t 1
  35  */
  36 
  37 package gc.gctests.SoftReference.soft004;
  38 
  39 import nsk.share.gc.*;
  40 import java.lang.ref.SoftReference;
  41 
  42 /**
  43  * Test that GC correctly clears soft references.
  44  *
  45  * This test is the same as soft003 except that it creates
  46  * a number of soft references to same object.
  47  *
  48  * @see gc.gctests.SoftReference.soft003
  49  */
  50 public class soft004 extends ThreadedGCTest {
  51 
  52     class Worker implements Runnable {
  53 
  54         private int arrayLength;
  55         private int objectSize = 100;
  56         private SoftReference[] references;
  57 
  58         private void makeReferences() {
  59             MemoryObject obj = new MemoryObject(objectSize);
  60             references = new SoftReference[arrayLength];
  61             for (int i = 0; i < arrayLength; ++i) {
  62                 references[i] = new SoftReference<MemoryObject>(obj);
  63             }
  64         }
  65 
  66         public void run() {
  67             arrayLength = Memory.getArrayLength(runParams.getTestMemory() - objectSize, Memory.getReferenceSize() + objectSize);
  68             System.out.println("Array size: " + arrayLength);
  69             makeReferences();
  70             Algorithms.eatMemory(getExecutionController());
  71             if (!getExecutionController().continueExecution()) {
  72                 return;
  73             }
  74             int n = 0;
  75             for (int i = 0; i < arrayLength; ++i) {
  76                 if (references[i].get() != null) {
  77                     ++n;
  78                 }
  79             }
  80             if (n != 0) {
  81                 log.error("Some of the references have been not cleared: " + n);
  82                 setFailed(true);
  83             }
  84         }
  85     }
  86 
  87     @Override
  88     protected Runnable createRunnable(int i) {
  89         return new Worker();
  90     }
  91 
  92     public static void main(String[] args) {
  93         GC.runTest(new soft004(), args);
  94     }
  95 }