266 lines
9.3 KiB
Java
266 lines
9.3 KiB
Java
/*
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* Copyright (c) 2006, 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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package nsk.share;
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import java.lang.ref.PhantomReference;
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import java.lang.ref.ReferenceQueue;
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import java.lang.ref.SoftReference;
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import java.lang.ref.WeakReference;
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/*
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* This class create/delete reference with given type.
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*
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* Supported reference types are:
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* - strong
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* - soft
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* - weak
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* - phantom
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* - jni local
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* - jni global
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* - jni weak
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*/
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public class ReferringObject
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{
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static
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{
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System.loadLibrary("JNIreferences");
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}
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public final static int maxJNIGlobalReferences = 1000;
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public final static int maxJNIWeakReferences = 1000;
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private Object reference;
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private String referenceType;
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//used for storing jni global and jni weak references
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private int referenceIndex;
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public ReferringObject(Object object, String referenceType)
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{
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this.referenceType = referenceType;
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if(referenceType.equals(ObjectInstancesManager.STRONG_REFERENCE))
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{
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createStrongReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.SOFT_REFERENCE))
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{
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createSoftReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.WEAK_REFERENCE))
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{
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createWeakReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.PHANTOM_REFERENCE))
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{
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createPhantomReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_GLOBAL_REFERENCE))
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{
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createJNIGlobalReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_LOCAL_REFERENCE))
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{
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createJNILocalReference(object);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_WEAK_REFERENCE))
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{
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createJNIWeakReference(object);
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}
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else
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throw new IllegalArgumentException("Invalid reference type: " + referenceType);
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}
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public void delete()
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{
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if(referenceType == null)
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{
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throw new TestBug("Reference type is null");
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}
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if(referenceType.equals(ObjectInstancesManager.SOFT_REFERENCE))
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{
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if(reference == null)
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{
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throw new TestBug("Reference is null for SoftReference");
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}
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if(((SoftReference)reference).get() == null)
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{
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// throw new TestBug("Test execution error: SoftReference was collected");
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}
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}
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else
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if(referenceType.equals(ObjectInstancesManager.WEAK_REFERENCE))
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{
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if(reference == null)
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{
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throw new TestBug("Reference is null for WeakReference");
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}
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if(((WeakReference)reference).get() == null)
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{
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// throw new TestBug("Test execution error: WeakReference was collected");
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}
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}
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else
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if(referenceType.equals(ObjectInstancesManager.PHANTOM_REFERENCE))
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{
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if(reference == null)
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{
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throw new TestBug("Reference is null for PhantomReference");
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}
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_GLOBAL_REFERENCE))
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{
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deleteJNIGlobalReferenceNative(referenceIndex);
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_LOCAL_REFERENCE))
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{
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deleteJNILocalReference();
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}
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else
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if(referenceType.equals(ObjectInstancesManager.JNI_WEAK_REFERENCE))
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{
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try {
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deleteJNIWeakReferenceNative(referenceIndex);
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} catch (Throwable t)
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{
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}
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}
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reference = null;
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}
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private void createStrongReference(Object object)
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{
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reference = object;
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}
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private void createSoftReference(Object object)
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{
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reference = new SoftReference<Object>(object);
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}
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private void createWeakReference(Object object)
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{
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reference = new WeakReference<Object>(object);
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}
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private void createPhantomReference(Object object)
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{
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reference = new PhantomReference<Object>(object, new ReferenceQueue<Object>());
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}
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private void createJNIGlobalReference(Object object)
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{
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referenceIndex = createJNIGlobalReferenceNative(object, maxJNIGlobalReferences);
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if(referenceIndex < 0)
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{
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throw new TestBug("Error on creation of JNI_Global reference, Possible number of JNI_Global references exceeded max available value!");
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}
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}
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/*
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* Since jni local reference valid only for duration of native method call, to create jni local reference
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* special thread is created which enter in native method, create jni local reference and wait
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*/
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private void createJNILocalReference(Object object)
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{
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this.reference = object;
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jniLocalReferenceThread = new JNILocalReferenceThread();
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jniLocalReferenceThread.start();
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// wait till JNI local reference will be created
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jniLocalReferenceThread.createWhicket.waitFor();
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reference = null;
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}
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private void deleteJNILocalReference()
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{
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// notify JNI method that JNI local reference is not needed any more and could be released
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jniLocalReferenceThread.deleteWhicket.unlock();
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try
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{
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jniLocalReferenceThread.join(1000 * 60 * 2);
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if(jniLocalReferenceThread.isAlive())
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{
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throw new TestBug("JNI_Local_Reference thread can't finish execution");
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}
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}
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catch(InterruptedException e)
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{
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throw new TestBug("deleteJNILocalReference was interrupted");
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}
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}
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private void createJNIWeakReference(Object object)
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{
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referenceIndex = createJNIWeakReferenceNative(object, maxJNIWeakReferences);
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if(referenceIndex < 0)
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{
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throw new TestBug("Error on creation of JNI_Weak reference. Possible number of JNI_Weak references exceeded max available value!");
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}
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}
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class JNILocalReferenceThread
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extends Thread
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{
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Wicket createWhicket = new Wicket();
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Wicket deleteWhicket = new Wicket();
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public void run()
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{
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createJNILocalReferenceNative(reference, createWhicket, deleteWhicket);
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}
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}
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private JNILocalReferenceThread jniLocalReferenceThread;
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private native int createJNIGlobalReferenceNative(Object object, int maxJNIGlobalReferences);
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private native void deleteJNIGlobalReferenceNative(int index);
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private native void createJNILocalReferenceNative(Object object, Wicket createWhicket, Wicket deleteWhicket);
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private native int createJNIWeakReferenceNative(Object object, int maxJNIWeakReferences);
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private native void deleteJNIWeakReferenceNative(int index);
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}
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