| /* |
| * Copyright (c) 2014, 2015, 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 |
| * @ignore 8078602 |
| * @summary Test verifies that lambda forms are garbage collected |
| * @author kshefov |
| * @library /lib/testlibrary/jsr292 /lib/testlibrary |
| * @build TestMethods |
| * @build LambdaFormTestCase |
| * @build LFGarbageCollectedTest |
| * @run main/othervm -Xmx64m -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+HeapDumpOnOutOfMemoryError -DHEAP_DUMP=false LFGarbageCollectedTest |
| */ |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodType; |
| import java.lang.ref.PhantomReference; |
| import java.lang.ref.Reference; |
| 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 { |
| private static boolean HEAP_DUMP = Boolean.getBoolean("HEAP_DUMP"); |
| |
| /** |
| * 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); |
| } |
| |
| PhantomReference ph; |
| ReferenceQueue rq = new ReferenceQueue(); |
| MethodType mtype; |
| Map<String, Object> data; |
| |
| @Override |
| public void doTest() { |
| try { |
| TestMethods testCase = getTestMethod(); |
| data = testCase.getTestCaseData(); |
| MethodHandle adapter; |
| try { |
| adapter = testCase.getTestCaseMH(data, TestMethods.Kind.ONE); |
| } catch (NoSuchMethodException ex) { |
| throw new Error("Unexpected exception: ", ex); |
| } |
| mtype = adapter.type(); |
| Object lambdaForm = INTERNAL_FORM.invoke(adapter); |
| if (lambdaForm == null) { |
| throw new Error("Unexpected error: Lambda form of the method handle is null"); |
| } |
| |
| String debugName = (String)DEBUG_NAME.get(lambdaForm); |
| if (debugName != null && debugName.startsWith("identity_")) { |
| // Ignore identity_* LambdaForms. |
| return; |
| } |
| |
| ph = new PhantomReference(lambdaForm, rq); |
| lambdaForm = null; |
| adapter = null; |
| |
| collectLambdaForm(); |
| } catch (IllegalAccessException | IllegalArgumentException | |
| InvocationTargetException ex) { |
| throw new Error("Unexpected exception: ", ex); |
| } |
| } |
| |
| |
| private void collectLambdaForm() throws IllegalAccessException { |
| // Usually, 2 System.GCs are necessary to enqueue a SoftReference. |
| System.gc(); |
| System.gc(); |
| |
| Reference ref = null; |
| for (int i = 0; i < 10; i++) { |
| try { |
| ref = rq.remove(1000); |
| } catch (InterruptedException e) { |
| /* ignore */ |
| } |
| if (ref != null) { |
| break; |
| } |
| System.gc(); // If the reference hasn't been queued yet, trigger one more GC. |
| } |
| |
| if (ref == null) { |
| dumpTestData(); |
| System.err.println("Method type: " + mtype); |
| System.err.println("LambdaForm: " + REF_FIELD.get(ph)); |
| |
| if (HEAP_DUMP) { |
| // Trigger OOM to force heap dump for post-mortem analysis. |
| val = new long[1_000_000_000]; |
| } |
| throw new AssertionError("Error: LambdaForm is not garbage collected"); |
| }; |
| } |
| |
| private void dumpTestData() { |
| System.err.println("Test case: " + getTestMethod()); |
| for (String s : data.keySet()) { |
| System.err.printf("\t%20s => %s\n", s, data.get(s)); |
| } |
| } |
| |
| private static long[] val; |
| |
| /** |
| * 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, |
| TestMethods.EXACT_INVOKER, |
| TestMethods.INVOKER)); |
| LambdaFormTestCase.runTests(LFGarbageCollectedTest::new, testMethods); |
| } |
| } |