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/*
* Copyright (c) 2011, 2020, 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
*
* @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 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);
}
}
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