222 lines
9.5 KiB
Java
222 lines
9.5 KiB
Java
/*
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* Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key stress gc
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*
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* @summary converted from VM Testbase gc/gctests/PhantomReference/phantom001.
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* VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
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* VM Testbase readme:
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* DESCRIPTION
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* The test checks that Garbage Collector correctly works with
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* PhantomReferences. It also checks that no unexpected exceptions and errors
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* are thrown or the JVM is not crashed.
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* The test starts a number of threads. Each thread run tests for some time
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* or serveral iterations. See javadoc StressOptions for configuration.
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* First of all each thread defines what type to check (there are 11 types
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* totally). As soon as the type is defined, a PhantomRefence is created that
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* refers to an array of tested type and is registered with in a queue. A
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* PhantomRefence for NonbranchyTree and Referent calsses does not refer to
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* arrays, but to instances of the classes.
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* After that a thread performs next checks for the reference:
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* 1. The reference is in queue after GC is provoked with
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* Algorithms.eatMemory() method (a single thread eats the memory).
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* 2. reference.get() returns null.
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* 3. queue.poll() returns the reference that was created.
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* 4. queue.poll() again returns null.
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* 5. If the checked type is class (Referent), then it must be finalized,
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* since the reference is already enqueued.
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* 6. reference.clear() does not throw any exception.
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* The test extends ThreadedGCTest and implements GarbageProducerAware and
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* MemoryStrategyAware interfaces. The corresponding javadoc documentation
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* for additional test configuration.
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*
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* @library /vmTestbase
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* /test/lib
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* @run driver jdk.test.lib.FileInstaller . .
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* @run main/othervm gc.gctests.PhantomReference.phantom001.phantom001 -ms low
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*/
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package gc.gctests.PhantomReference.phantom001;
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import java.lang.ref.*;
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import nsk.share.gc.*;
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import nsk.share.gc.gp.*;
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import nsk.share.gc.gp.string.InternedStringProducer;
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import nsk.share.gc.gp.string.RandomStringProducer;
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public class phantom001 extends ThreadedGCTest implements GarbageProducerAware, MemoryStrategyAware {
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private GarbageProducer garbageProducer;
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private MemoryStrategy memoryStrategy;
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private InternedStringProducer internedStringProducer = new InternedStringProducer(new RandomStringProducer(10));
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// Total number of types to test
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final static int TYPES_COUNT = 12;
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// Size of array of each tested type. The constant also specifies the
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// number of nodes in a NonbranchyTree and size of each node
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final static int SIZE = 100;
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protected Runnable createRunnable(int i) {
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return new Test();
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}
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public void setGarbageProducer(GarbageProducer garbageProducer) {
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this.garbageProducer = garbageProducer;
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}
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public void setMemoryStrategy(MemoryStrategy memoryStrategy) {
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this.memoryStrategy = memoryStrategy;
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}
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public static void main(String[] args) {
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GC.runTest(new phantom001(), args);
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}
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// The class implements the logic of the testcase
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class Test implements Runnable {
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int iteration;
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private volatile boolean finalized;
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public void run() {
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try {
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log.info("iteration " + iteration);
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ReferenceQueue queue = new ReferenceQueue();
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PhantomReference reference;
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int code = iteration % TYPES_COUNT;
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String type;
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// Define a specific type for each thread to test
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switch (code) {
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case 0:
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reference = new PhantomReference(new byte[SIZE], queue);
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type = "byte";
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break;
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case 1:
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reference = new PhantomReference(new short[SIZE], queue);
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type = "short";
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break;
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case 2:
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reference = new PhantomReference(new int[SIZE], queue);
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type = "int";
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break;
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case 3:
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reference = new PhantomReference(new long[SIZE], queue);
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type = "long";
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break;
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case 4:
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reference = new PhantomReference(new char[SIZE], queue);
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type = "char";
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break;
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case 5:
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reference = new PhantomReference(new boolean[SIZE], queue);
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type = "boolean";
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break;
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case 6:
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reference = new PhantomReference(new double[SIZE], queue);
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type = "double";
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break;
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case 7:
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reference = new PhantomReference(new float[SIZE], queue);
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type = "float";
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break;
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case 8:
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reference = new PhantomReference(new Object[SIZE], queue);
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type = "Object";
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break;
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case 9:
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reference = new PhantomReference(new NonbranchyTree(SIZE, 0.3f, SIZE),
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queue);
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type = "NonbranchyTree";
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break;
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case 10:
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reference = new PhantomReference(internedStringProducer.create(SIZE), queue);
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type = "InternedString";
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break;
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default:
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reference = new PhantomReference(new Referent(), queue);
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type = "class";
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}
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int initialFactor = memoryStrategy.equals(MemoryStrategy.HIGH) ? 1 : (memoryStrategy.equals(MemoryStrategy.LOW) ? 10 : 2);
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GarbageUtils.eatMemory(getExecutionController(), garbageProducer, initialFactor , 10, 0);
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if (type.equals("class")) {
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while (!finalized && getExecutionController().continueExecution()) {
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System.runFinalization(); //does not guarantee finalization, but increases the chance
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {}
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GarbageUtils.eatMemory(getExecutionController(), garbageProducer, initialFactor , 10, 0);
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}
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//provoke gc once more to make finalized object phantom reachable
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GarbageUtils.eatMemory(getExecutionController(), garbageProducer, initialFactor , 10, 0);
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}
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if (!getExecutionController().continueExecution()) {
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// we were interrrupted by stresser. just exit...
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return;
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}
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Reference polledReference = null;
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try {
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polledReference = queue.remove();
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} catch (InterruptedException e) {
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log.error("Unexpected InterruptedException during queue.remove().");
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setFailed(true);
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}
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// Check the reference and the queue
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// The polled reference must be equal to the one enqueued to
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// the queue
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if (polledReference != reference) {
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log.error("The original reference is not equal to polled reference.");
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setFailed(true);
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}
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// queue.poll() once again must return null now, since there is
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// only one reference in the queue
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polledReference = queue.poll();
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if (polledReference != null) {
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log.error("There are more than one references in the queue.");
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setFailed(true);
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}
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reference.clear();
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} catch (OutOfMemoryError e) {
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}
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iteration++;
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}
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class Referent {
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//We need discard this flag to make second and following checks with type.equals("class") useful
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public Referent() {
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finalized = false;
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}
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protected void finalize() {
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finalized = true;
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}
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}
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}
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}
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