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/*
* Copyright (c) 2014, 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 LFGarbageCollectedTest
* @bug 8046703
* @summary Test verifies that lambda forms are garbage collected
* @author kshefov
* @ignore 8057020
* @library /lib/testlibrary/jsr292 /lib/testlibrary
* @build TestMethods
* @build LambdaFormTestCase
* @build LFGarbageCollectedTest
* @run main/othervm/timeout=600 -Djava.lang.invoke.MethodHandle.USE_LF_EDITOR=true -DtestLimit=150 LFGarbageCollectedTest
*/
import java.lang.invoke.MethodHandle;
import java.lang.ref.PhantomReference;
import java.lang.ref.ReferenceQueue;
import java.lang.reflect.InvocationTargetException;
import java.util.EnumSet;
import java.util.Map;
/**
* Lambda forms garbage collection test class.
*/
public final class LFGarbageCollectedTest extends LambdaFormTestCase {
/**
* Constructor for a lambda forms garbage collection test case.
*
* @param testMethod A method from {@code j.l.i.MethodHandles} class that
* returns a {@code j.l.i.MethodHandle} instance.
*/
public LFGarbageCollectedTest(TestMethods testMethod) {
super(testMethod);
}
@Override
public void doTest() {
try {
Map<String, Object> data = getTestMethod().getTestCaseData();
MethodHandle adapter;
try {
adapter = getTestMethod().getTestCaseMH(data, TestMethods.Kind.ONE);
} catch (NoSuchMethodException ex) {
throw new Error("Unexpected exception: ", ex);
}
Object lambdaForm = LambdaFormTestCase.INTERNAL_FORM.invoke(adapter);
if (lambdaForm == null) {
throw new Error("Unexpected error: Lambda form of the method handle is null");
}
ReferenceQueue rq = new ReferenceQueue();
PhantomReference ph = new PhantomReference(lambdaForm, rq);
lambdaForm = null;
data = null;
adapter = null;
for (int i = 0; i < 1000 && !ph.isEnqueued(); i++) {
System.gc();
}
if (!ph.isEnqueued()) {
throw new AssertionError("Error: Lambda form is not garbage collected");
}
} catch (IllegalAccessException | IllegalArgumentException |
InvocationTargetException ex) {
throw new Error("Unexpected exception: ", ex);
}
}
/**
* Main routine for lambda forms garbage collection test.
*
* @param args Accepts no arguments.
*/
public static void main(String[] args) {
// The "identity", "constant", "arrayElementGetter" and "arrayElementSetter"
// methods should be removed from this test,
// because their lambda forms are stored in a static field and are not GC'ed.
// There can be only a finite number of such LFs for each method,
// so no memory leak happens.
EnumSet<TestMethods> testMethods = EnumSet.complementOf(EnumSet.of(
TestMethods.IDENTITY,
TestMethods.CONSTANT,
TestMethods.ARRAY_ELEMENT_GETTER,
TestMethods.ARRAY_ELEMENT_SETTER));
LambdaFormTestCase.runTests(LFGarbageCollectedTest::new, testMethods);
}
}
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