1 /* 2 * Copyright (c) 2015, 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 package org.graalvm.compiler.replacements.test; 24 25 import org.graalvm.compiler.api.directives.GraalDirectives; 26 import org.graalvm.compiler.bytecode.BytecodeProvider; 27 import org.graalvm.compiler.debug.Debug; 28 import org.graalvm.compiler.debug.DebugConfigScope; 29 import org.graalvm.compiler.debug.GraalError; 30 import org.graalvm.compiler.nodes.ValueNode; 31 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; 32 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin; 33 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins; 34 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration; 35 import org.graalvm.compiler.replacements.Snippets; 36 import org.graalvm.compiler.word.Word; 37 import org.junit.Test; 38 39 import jdk.vm.ci.meta.ResolvedJavaMethod; 40 41 public class PointerTrackingTest extends ReplacementsTest implements Snippets { 42 43 @Test 44 public void testTracking() { 45 Result result = executeActual(getResolvedJavaMethod("trackingSnippet"), null, new Object()); 46 assertEquals(new Result("OK", null), result); 47 } 48 49 public static String trackingSnippet(Object obj) { 50 long trackedBeforeGC = getTrackedPointer(obj); 51 long untrackedBeforeGC = getUntrackedPointer(obj); 52 53 int i = 0; 54 while (untrackedBeforeGC == getTrackedPointer(obj)) { 55 System.gc(); 56 if (i++ > 100) { 57 return "Timeout! Object didn't move after 100 GCs."; 58 } 59 } 60 61 long trackedAfterGC = getTrackedPointer(obj); 62 long untrackedAfterGC = getUntrackedPointer(obj); 63 64 if (untrackedBeforeGC == untrackedAfterGC) { 65 /* 66 * The untracked pointer isn't supposed to be updated, so it should be different before 67 * and after GC. 68 */ 69 return "untrackedBeforeGC == untrackedAfterGC"; 70 } 71 if (trackedBeforeGC != trackedAfterGC) { 72 /* 73 * The trackedBeforeGC variable should be updated to the new location by the GC, so it 74 * should be equal to trackedAfterGC. 75 */ 76 return "trackedBeforeGC != trackedAfterGC"; 77 } 78 79 return "OK"; 80 } 81 82 @Test(expected = GraalError.class) 83 @SuppressWarnings("try") 84 public void testVerification() { 85 try (DebugConfigScope scope = Debug.disableIntercept()) { 86 compile(getResolvedJavaMethod("verificationSnippet"), null); 87 } 88 } 89 90 public static long verificationSnippet(Object obj) { 91 long value = getTrackedPointer(obj) * 7 + 3; 92 93 /* 94 * Ensure usage before and after GC to force the value to be alive across the safepoint. 95 * This should lead to a compiler error, since value can not be tracked in the reference 96 * map. 97 */ 98 GraalDirectives.blackhole(value); 99 System.gc(); 100 return value; 101 } 102 103 static long getTrackedPointer(@SuppressWarnings("unused") Object obj) { 104 throw GraalError.shouldNotReachHere("should be intrinsified"); 105 } 106 107 static long getUntrackedPointer(@SuppressWarnings("unused") Object obj) { 108 throw GraalError.shouldNotReachHere("should be intrinsified"); 109 } 110 111 static long getTrackedPointerIntrinsic(Object obj) { 112 return Word.objectToTrackedPointer(obj).rawValue(); 113 } 114 115 static long getUntrackedPointerIntrinsic(Object obj) { 116 return Word.objectToUntrackedPointer(obj).rawValue(); 117 } 118 119 private void register(Registration r, String fnName) { 120 ResolvedJavaMethod intrinsic = getResolvedJavaMethod(fnName + "Intrinsic"); 121 BytecodeProvider bytecodeProvider = getSystemClassLoaderBytecodeProvider(); 122 r.register1(fnName, Object.class, new InvocationPlugin() { 123 @Override 124 public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode arg) { 125 return b.intrinsify(bytecodeProvider, targetMethod, intrinsic, receiver, new ValueNode[]{arg}); 126 } 127 }); 128 } 129 130 @Override 131 protected void registerInvocationPlugins(InvocationPlugins invocationPlugins) { 132 Registration r = new Registration(invocationPlugins, PointerTrackingTest.class); 133 134 register(r, "getTrackedPointer"); 135 register(r, "getUntrackedPointer"); 136 } 137 }