| /* |
| * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @key stress gc |
| * |
| * @summary converted from VM Testbase gc/gctests/SoftReference/SoftReferenceTest. |
| * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * Test that all SoftReferences has been cleared at time of OOM. |
| * |
| * COMMENTS |
| * This test was ported from JRockit test suite. |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm gc.gctests.SoftReference.SoftReferenceTest.SoftReferenceTest -stressTime 600 |
| */ |
| |
| package gc.gctests.SoftReference.SoftReferenceTest; |
| |
| import java.lang.ref.SoftReference; |
| import java.util.ArrayList; |
| import java.util.Random; |
| import nsk.share.TestFailure; |
| import nsk.share.gc.GC; |
| import nsk.share.gc.GCTestBase; |
| import nsk.share.test.ExecutionController; |
| import nsk.share.test.Stresser; |
| |
| /** |
| * Tests for the SoftReference handling in JRockit. |
| */ |
| public final class SoftReferenceTest extends GCTestBase { |
| |
| private ExecutionController stresser; |
| |
| /** |
| * Test that all SoftReferences has been cleared at |
| * time of OOM. |
| * |
| * @return success if all SoftReferences are NULL at |
| * time of OOM. |
| */ |
| public void run() { |
| //prepare stresser |
| stresser = new Stresser("Stresser to limit execution time", runParams.getStressOptions()); |
| stresser.start(1); |
| |
| long seed; |
| int minSize; |
| int maxSize; |
| int keepEveryXthObject; |
| long counter = 0; |
| |
| seed = runParams.getSeed(); |
| minSize = 2048; |
| maxSize = 32768; |
| keepEveryXthObject = 4; |
| |
| |
| Random rndGenerator = new Random(seed); |
| long multiplier = maxSize - minSize; |
| ArrayList arrSoftRefs = new ArrayList(); |
| ArrayList arrObjects = new ArrayList(); |
| long numberOfNotNulledObjects = 0; |
| long oomSoftArraySize = 0; |
| |
| try { |
| while (true && stresser.continueExecution()) { |
| int allocationSize = ((int) (rndGenerator.nextDouble() |
| * multiplier)) + minSize; |
| byte[] tmp = new byte[allocationSize]; |
| |
| // Keep every Xth object to make sure we hit OOM pretty fast |
| if (counter % keepEveryXthObject == 0) { |
| arrObjects.add(tmp); |
| } else { |
| arrSoftRefs.add(new SoftReference(tmp)); |
| } |
| |
| // Make sure the temporary object is dereferenced |
| tmp = null; |
| |
| counter++; |
| if (counter == Long.MAX_VALUE) { |
| counter = 0; |
| } |
| } |
| } catch (OutOfMemoryError oome) { |
| // Get the number of soft refs first, so we don't trigger |
| // another OOM. |
| oomSoftArraySize = arrSoftRefs.size(); |
| |
| for (int i = 0; i < arrSoftRefs.size(); i++) { |
| SoftReference sr = (SoftReference) arrSoftRefs.get(i); |
| Object o = sr.get(); |
| |
| if (o != null) { |
| numberOfNotNulledObjects++; |
| } |
| } |
| |
| // Make sure we clear all refs before we return failure, since |
| // coconut require some memory to complete, and since we're in |
| // an OOM situation, that could cause trouble. |
| |
| arrSoftRefs = null; |
| arrObjects = null; |
| |
| if (numberOfNotNulledObjects > 0) { |
| throw new TestFailure(numberOfNotNulledObjects + " out of " |
| + oomSoftArraySize + " SoftReferences was not " |
| + "null at time of OutOfMemoryError"); |
| } |
| } finally { |
| arrSoftRefs = null; |
| arrObjects = null; |
| } |
| |
| |
| } |
| |
| public static void main(String[] args) { |
| GC.runTest(new SoftReferenceTest(), args); |
| } |
| } |