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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 randomness
*
* @summary converted from VM Testbase gc/gctests/OneeFinalizerTest.
* VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit]
* VM Testbase readme:
* DESCRIPTION
* Regression test that verifies that only one finalizer gets called.
*
* COMMENTS
* This test was ported from JRockit test suite.
*
* @library /vmTestbase
* /test/lib
* @run main/othervm
* -XX:-UseGCOverheadLimit
* -Xlog:gc:gc.log
* gc.gctests.OneeFinalizerTest.OneeFinalizerTest
*/
package gc.gctests.OneeFinalizerTest;
import nsk.share.TestFailure;
import nsk.share.gc.GC;
import nsk.share.gc.GCTestBase;
import nsk.share.gc.gp.GarbageUtils;
import nsk.share.test.Stresser;
/**
* Test that verifies that finalize() method is invoking only once.
*/
public class OneeFinalizerTest extends GCTestBase {
private GlobalSafeCounter[] finalizerCounters = null;
/**
* Helper class used for counting number of calls to finalizers.
*/
protected class GlobalSafeCounter {
private int counter;
/**
* Constructor that inits the global counter to 0.
*/
protected GlobalSafeCounter() {
counter = 0;
}
/**
* Reset the global counter to 0.
*/
protected final void resetCounter() {
synchronized (this) {
counter = 0;
}
}
/**
* Increase the global counter by 1.
*/
protected final void increaseCounter() {
synchronized (this) {
counter++;
}
}
/**
* Retrieve the global counter value.
*
* @return value of the global counter
*/
protected final int getCounterValue() {
int value;
synchronized (this) {
value = counter;
}
return value;
}
}
/**
* Helper class the implements finalize(), and that increments
* the global counters for each finalize() invokation.
*/
protected class FinalizedObject {
private final int counterIndex;
/**
* Constructor for the helper object which implements finalize().
*
* @param index Index for the counter in the global array, that
* corresponds to this object.
*/
protected FinalizedObject(int index) {
counterIndex = index;
}
/**
* Increases the global counter for this object when finalize()
* gets called (to make sure each finalizer gets called onee).
*/
@Override
protected final void finalize() {
finalizerCounters[counterIndex].increaseCounter();
}
}
private void initOneeFinalizerTest(int numberOfObjects) {
// NOTE: Set to null in case it's been used before (to prevent OOM)
finalizerCounters = null;
finalizerCounters = new GlobalSafeCounter[numberOfObjects];
for (int i = 0; i < numberOfObjects; i++) {
finalizerCounters[i] = new GlobalSafeCounter();
}
}
/**
* Tests that the finalize() method on each FinalizedObject instance
* has been called exactly one time.
*/
@Override
public void run() {
int numberOfObjects = 2000;
initOneeFinalizerTest(numberOfObjects);
FinalizedObject[] testObjects = new FinalizedObject[numberOfObjects];
// creates garbage
for (int i = 0; i < numberOfObjects; i++) {
testObjects[i] = new FinalizedObject(i);
}
if (testObjects[0].hashCode() == 212_85_06) {
System.out.println("Bingo!!!");
}
testObjects = null;
Stresser stresser = new Stresser(runParams.getStressOptions());
stresser.start(0);
/* force finalization */
GarbageUtils.eatMemory(stresser);
if (!stresser.continueExecution()) {
// may be we didn't eat all memory and didn't provoke GC
System.out.println("Passed without check");
return;
}
System.gc();
System.runFinalization();
System.gc();
System.runFinalization();
System.gc();
int numberOfFinalizersRunMoreThanOnce = 0;
int numberOfFinalizersNotRun = 0;
for (int i = 0; i < numberOfObjects; i++) {
int counter = finalizerCounters[i].getCounterValue();
if (counter > 1) {
numberOfFinalizersRunMoreThanOnce++;
System.err.println("Object #" + i + " counter = " + counter);
} else if (counter == 0) {
System.err.println("WARNING: Finalizer not run for object #" + i);
numberOfFinalizersNotRun++;
}
}
if (numberOfFinalizersNotRun > 0) {
System.err.println("WARNING: " + numberOfFinalizersNotRun + " finalizers not run");
}
if (numberOfFinalizersRunMoreThanOnce != 0) {
throw new TestFailure("OneeFinalizerTest failed. " + numberOfFinalizersRunMoreThanOnce + " errors");
}
System.out.println("Test passed.");
}
public static void main(String[] args) {
GC.runTest(new OneeFinalizerTest(), args);
}
}
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