| /* |
| * Copyright (c) 2016, 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. |
| */ |
| package org.graalvm.compiler.core.test; |
| |
| import java.lang.ref.Reference; |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.WeakReference; |
| |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.core.common.LocationIdentity; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.loop.LoopEx; |
| import org.graalvm.compiler.loop.LoopsData; |
| import org.graalvm.compiler.nodes.FieldLocationIdentity; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.memory.Access; |
| |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| |
| public class ReferenceGetLoopTest extends GraalCompilerTest { |
| |
| @Override |
| protected boolean checkMidTierGraph(StructuredGraph graph) { |
| final LoopsData loops = new LoopsData(graph); |
| boolean found = false; |
| for (LoopEx loop : loops.loops()) { |
| for (Node node : loop.inside().nodes()) { |
| if (node instanceof Access) { |
| Access access = (Access) node; |
| LocationIdentity location = access.getLocationIdentity(); |
| if (location instanceof FieldLocationIdentity) { |
| ResolvedJavaField field = ((FieldLocationIdentity) location).getField(); |
| if (field.getName().equals("referent") && field.getDeclaringClass().equals(getMetaAccess().lookupJavaType(Reference.class))) { |
| found = true; |
| } |
| } |
| } |
| } |
| } |
| if (!found) { |
| assertTrue(false, "Reference.referent not found in loop: " + getCanonicalGraphString(graph, true, false)); |
| } |
| return true; |
| } |
| |
| public volatile Object referent; |
| public final FinalWeakReference<Object> ref; |
| public final ReferenceQueue<Object> refQueue; |
| |
| /* |
| * Ensure that the Reference.get invoke is statically bindable. |
| */ |
| public static final class FinalWeakReference<T> extends WeakReference<T> { |
| public FinalWeakReference(T referent, ReferenceQueue<? super T> q) { |
| super(referent, q); |
| } |
| } |
| |
| public ReferenceGetLoopTest() { |
| referent = new Object(); |
| refQueue = new ReferenceQueue<>(); |
| ref = new FinalWeakReference<>(referent, refQueue); |
| } |
| |
| @Test |
| public void test() { |
| getCode(getMetaAccess().lookupJavaMethod(getMethod("testSnippet"))); |
| } |
| |
| public void testSnippet() { |
| while (ref.get() != null) { |
| // burn! |
| } |
| } |
| } |