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 randomness 27 * 28 * @summary converted from VM Testbase gc/gctests/SoftReference/soft003. 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.soft003.soft003 -t 1 35 */ 36 37 package gc.gctests.SoftReference.soft003; 38 39 import java.lang.ref.Reference; 40 import nsk.share.test.*; 41 import nsk.share.gc.*; 42 import nsk.share.TestFailure; 43 import java.lang.ref.SoftReference; 44 45 /** 46 * Test that GC clears soft references before throwing OOM. 47 * 48 * This test creates a number of soft references, then provokes 49 * GC with Algorithms.eatMemory() and checks that all references 50 * have been cleared. 51 */ 52 public class soft003 extends ThreadedGCTest { 53 54 class Worker implements Runnable { 55 56 private int arrayLength; 57 private int objectSize = 100; 58 private Reference[] references; 59 60 public void run() { 61 for (int i = 0; i < arrayLength; ++i) { 62 references[i] = new SoftReference<MemoryObject>(new MemoryObject(LocalRandom.nextInt(objectSize))); 63 } 64 Algorithms.eatMemory(getExecutionController()); 65 if (!getExecutionController().continueExecution()) { 66 return; 67 } 68 // Check that all references have been cleared 69 int n = 0; 70 for (int i = 0; i < arrayLength; ++i) { 71 if (references[i].get() != null) { 72 ++n; 73 } 74 } 75 if (n != 0) { 76 references = null; 77 throw new TestFailure("Some of the references have been not cleared: " + n); 78 } 79 } 80 81 public void Worker() { 82 arrayLength = Memory.getArrayLength(runParams.getTestMemory(), Memory.getReferenceSize() + objectSize); 83 System.out.println("Array size: " + arrayLength); 84 references = new Reference[arrayLength]; 85 } 86 } 87 88 @Override 89 protected Runnable createRunnable(int i) { 90 return new Worker(); 91 } 92 93 public static void main(String[] args) { 94 GC.runTest(new soft003(), args); 95 } 96 }