LFGarbageCollectedTest.java revision 10699:12e9ae2a63f5
1/* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25 * @test LFGarbageCollectedTest 26 * @bug 8046703 27 * @summary Test verifies that lambda forms are garbage collected 28 * @author kshefov 29 * @ignore 8057020 30 * @library /lib/testlibrary/jsr292 /lib/testlibrary 31 * @build TestMethods 32 * @build LambdaFormTestCase 33 * @build LFGarbageCollectedTest 34 * @run main/othervm/timeout=600 -Djava.lang.invoke.MethodHandle.USE_LF_EDITOR=true -DtestLimit=150 LFGarbageCollectedTest 35 */ 36 37import java.lang.invoke.MethodHandle; 38import java.lang.ref.PhantomReference; 39import java.lang.ref.ReferenceQueue; 40import java.lang.reflect.InvocationTargetException; 41import java.util.EnumSet; 42import java.util.Map; 43 44/** 45 * Lambda forms garbage collection test class. 46 */ 47public final class LFGarbageCollectedTest extends LambdaFormTestCase { 48 49 /** 50 * Constructor for a lambda forms garbage collection test case. 51 * 52 * @param testMethod A method from {@code j.l.i.MethodHandles} class that 53 * returns a {@code j.l.i.MethodHandle} instance. 54 */ 55 public LFGarbageCollectedTest(TestMethods testMethod) { 56 super(testMethod); 57 } 58 59 @Override 60 public void doTest() { 61 try { 62 Map<String, Object> data = getTestMethod().getTestCaseData(); 63 MethodHandle adapter; 64 try { 65 adapter = getTestMethod().getTestCaseMH(data, TestMethods.Kind.ONE); 66 } catch (NoSuchMethodException ex) { 67 throw new Error("Unexpected exception: ", ex); 68 } 69 Object lambdaForm = LambdaFormTestCase.INTERNAL_FORM.invoke(adapter); 70 if (lambdaForm == null) { 71 throw new Error("Unexpected error: Lambda form of the method handle is null"); 72 } 73 ReferenceQueue rq = new ReferenceQueue(); 74 PhantomReference ph = new PhantomReference(lambdaForm, rq); 75 lambdaForm = null; 76 data = null; 77 adapter = null; 78 for (int i = 0; i < 1000 && !ph.isEnqueued(); i++) { 79 System.gc(); 80 } 81 if (!ph.isEnqueued()) { 82 throw new AssertionError("Error: Lambda form is not garbage collected"); 83 } 84 } catch (IllegalAccessException | IllegalArgumentException | 85 InvocationTargetException ex) { 86 throw new Error("Unexpected exception: ", ex); 87 } 88 } 89 90 /** 91 * Main routine for lambda forms garbage collection test. 92 * 93 * @param args Accepts no arguments. 94 */ 95 public static void main(String[] args) { 96 // The "identity", "constant", "arrayElementGetter" and "arrayElementSetter" 97 // methods should be removed from this test, 98 // because their lambda forms are stored in a static field and are not GC'ed. 99 // There can be only a finite number of such LFs for each method, 100 // so no memory leak happens. 101 EnumSet<TestMethods> testMethods = EnumSet.complementOf(EnumSet.of( 102 TestMethods.IDENTITY, 103 TestMethods.CONSTANT, 104 TestMethods.ARRAY_ELEMENT_GETTER, 105 TestMethods.ARRAY_ELEMENT_SETTER)); 106 LambdaFormTestCase.runTests(LFGarbageCollectedTest::new, testMethods); 107 } 108} 109