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 }