| /* |
| * Copyright (c) 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. |
| */ |
| package org.graalvm.compiler.replacements.test; |
| |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.api.directives.GraalDirectives; |
| import org.graalvm.compiler.core.test.GraalCompilerTest; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.DebugConfigScope; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.Plugins; |
| import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; |
| import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin; |
| import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration; |
| import org.graalvm.compiler.replacements.Snippets; |
| import org.graalvm.compiler.word.Word; |
| |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| public class PointerTrackingTest extends GraalCompilerTest implements Snippets { |
| |
| @Test |
| public void testTracking() { |
| Result result = executeActual(getResolvedJavaMethod("trackingSnippet"), null, new Object()); |
| assertEquals(new Result("OK", null), result); |
| } |
| |
| public static String trackingSnippet(Object obj) { |
| long trackedBeforeGC = getTrackedPointer(obj); |
| long untrackedBeforeGC = getUntrackedPointer(obj); |
| |
| int i = 0; |
| while (untrackedBeforeGC == getTrackedPointer(obj)) { |
| System.gc(); |
| if (i++ > 100) { |
| return "Timeout! Object didn't move after 100 GCs."; |
| } |
| } |
| |
| long trackedAfterGC = getTrackedPointer(obj); |
| long untrackedAfterGC = getUntrackedPointer(obj); |
| |
| if (untrackedBeforeGC == untrackedAfterGC) { |
| /* |
| * The untracked pointer isn't supposed to be updated, so it should be different before |
| * and after GC. |
| */ |
| return "untrackedBeforeGC == untrackedAfterGC"; |
| } |
| if (trackedBeforeGC != trackedAfterGC) { |
| /* |
| * The trackedBeforeGC variable should be updated to the new location by the GC, so it |
| * should be equal to trackedAfterGC. |
| */ |
| return "trackedBeforeGC != trackedAfterGC"; |
| } |
| |
| return "OK"; |
| } |
| |
| @Test(expected = GraalError.class) |
| @SuppressWarnings("try") |
| public void testVerification() { |
| try (DebugConfigScope scope = Debug.disableIntercept()) { |
| compile(getResolvedJavaMethod("verificationSnippet"), null); |
| } |
| } |
| |
| public static long verificationSnippet(Object obj) { |
| long value = getTrackedPointer(obj) * 7 + 3; |
| |
| /* |
| * Ensure usage before and after GC to force the value to be alive across the safepoint. |
| * This should lead to a compiler error, since value can not be tracked in the reference |
| * map. |
| */ |
| GraalDirectives.blackhole(value); |
| System.gc(); |
| return value; |
| } |
| |
| static long getTrackedPointer(@SuppressWarnings("unused") Object obj) { |
| throw GraalError.shouldNotReachHere("should be intrinsified"); |
| } |
| |
| static long getUntrackedPointer(@SuppressWarnings("unused") Object obj) { |
| throw GraalError.shouldNotReachHere("should be intrinsified"); |
| } |
| |
| static long getTrackedPointerIntrinsic(Object obj) { |
| return Word.objectToTrackedPointer(obj).rawValue(); |
| } |
| |
| static long getUntrackedPointerIntrinsic(Object obj) { |
| return Word.objectToUntrackedPointer(obj).rawValue(); |
| } |
| |
| private void register(Registration r, String fnName) { |
| ResolvedJavaMethod intrinsic = getResolvedJavaMethod(fnName + "Intrinsic"); |
| r.register1(fnName, Object.class, new InvocationPlugin() { |
| @Override |
| public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode arg) { |
| return b.intrinsify(getReplacements().getReplacementBytecodeProvider(), targetMethod, intrinsic, receiver, new ValueNode[]{arg}); |
| } |
| }); |
| } |
| |
| @Override |
| protected Plugins getDefaultGraphBuilderPlugins() { |
| Plugins plugins = super.getDefaultGraphBuilderPlugins(); |
| Registration r = new Registration(plugins.getInvocationPlugins(), PointerTrackingTest.class); |
| |
| register(r, "getTrackedPointer"); |
| register(r, "getUntrackedPointer"); |
| |
| return plugins; |
| } |
| } |