| /* |
| * Copyright (c) 2011, 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/GcPointerCheckTest. |
| * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * Test that no pointers are broken. |
| * |
| * COMMENTS |
| * This test was ported from JRockit test suite. |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm -XX:-UseGCOverheadLimit gc.gctests.GcPointerCheckTest.GcPointerCheckTest |
| */ |
| |
| package gc.gctests.GcPointerCheckTest; |
| |
| import nsk.share.TestFailure; |
| import nsk.share.gc.GC; |
| import nsk.share.gc.ThreadedGCTest; |
| import nsk.share.test.ExecutionController; |
| |
| /** |
| * Test that no pointers are broken. |
| */ |
| public class GcPointerCheckTest extends ThreadedGCTest { |
| |
| @Override |
| protected Runnable createRunnable(int i) { |
| return new Test(); |
| } |
| |
| class Test implements Runnable { |
| |
| /** |
| * Helper class for linking objects together. |
| */ |
| private class PointerHelper { |
| |
| public PointerHelper next; |
| } |
| private PointerHelper first; |
| ExecutionController stresser; |
| |
| @Override |
| public void run() { |
| if (stresser == null) { |
| stresser = getExecutionController(); |
| } |
| while (stresser.continueExecution()) { |
| testGcPointers(); |
| } |
| } |
| |
| /** |
| * Create a lot of objects and link them together, then verify |
| * that the pointers are pointing to the correct type of objects. |
| * |
| * @return success if all references points to the correct type |
| * of object. |
| */ |
| public void testGcPointers() { |
| |
| int innerIters = 1; |
| int outerIters = 200; |
| |
| PointerHelper tmp1; |
| PointerHelper tmp2; |
| |
| while (outerIters > 0) { |
| int i = 0; |
| tmp1 = new PointerHelper(); |
| this.first = tmp1; |
| |
| while (i != innerIters) { |
| i++; |
| tmp2 = new PointerHelper(); |
| tmp1.next = tmp2; |
| tmp1 = tmp2; |
| tmp2 = new PointerHelper(); |
| } |
| |
| outerIters--; |
| |
| if (!checkRefs()) { |
| throw new TestFailure("Some references were bad"); |
| } |
| } |
| } |
| |
| private boolean checkRefs() { |
| PointerHelper iter = this.first; |
| |
| for (int i = 0; iter != null; iter = iter.next) { |
| i++; |
| |
| if (iter.getClass() != PointerHelper.class) { |
| //("GC causer bad ref on " + i); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| } |
| |
| public static void main(String[] args) { |
| GC.runTest(new GcPointerCheckTest(), args); |
| } |
| } |