1 /* 2 * Copyright (c) 2012, 2018, 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 package org.graalvm.compiler.hotspot.replacements; 26 27 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; 28 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_METAACCESS; 29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.ARRAY_KLASS_COMPONENT_MIRROR; 30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION; 31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_MODIFIER_FLAGS_LOCATION; 32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_SUPER_KLASS_LOCATION; 33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassComponentMirrorOffset; 34 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset; 35 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassIsArray; 36 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassModifierFlagsOffset; 37 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassSuperKlassOffset; 38 39 import java.lang.reflect.Modifier; 40 41 import org.graalvm.compiler.api.replacements.ClassSubstitution; 42 import org.graalvm.compiler.api.replacements.Fold; 43 import org.graalvm.compiler.api.replacements.MethodSubstitution; 44 import org.graalvm.compiler.hotspot.word.KlassPointer; 45 import org.graalvm.compiler.nodes.ConstantNode; 46 import org.graalvm.compiler.nodes.PiNode; 47 import org.graalvm.compiler.nodes.SnippetAnchorNode; 48 49 import jdk.vm.ci.meta.MetaAccessProvider; 50 import jdk.vm.ci.meta.ResolvedJavaType; 51 52 // JaCoCo Exclude 53 54 /** 55 * Substitutions for {@link java.lang.Class} methods. 56 */ 57 @ClassSubstitution(Class.class) 58 public class HotSpotClassSubstitutions { 59 60 @MethodSubstitution(isStatic = false) 61 public static int getModifiers(final Class<?> thisObj) { 62 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 63 if (klass.isNull()) { 64 // Class for primitive type 65 return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC; 66 } else { 67 return klass.readInt(klassModifierFlagsOffset(INJECTED_VMCONFIG), KLASS_MODIFIER_FLAGS_LOCATION); 68 } 69 } 70 71 @MethodSubstitution(isStatic = false) 72 public static boolean isInterface(final Class<?> thisObj) { 73 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 74 if (klass.isNull()) { 75 // Class for primitive type 76 return false; 77 } else { 78 int accessFlags = klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION); 79 return (accessFlags & Modifier.INTERFACE) != 0; 80 } 81 } 82 83 @MethodSubstitution(isStatic = false) 84 public static boolean isArray(final Class<?> thisObj) { 85 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 86 if (klass.isNull()) { 87 // Class for primitive type 88 return false; 89 } else { 90 KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); 91 return klassIsArray(klassNonNull); 92 } 93 } 94 95 @MethodSubstitution(isStatic = false) 96 public static boolean isPrimitive(final Class<?> thisObj) { 97 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 98 return klass.isNull(); 99 } 100 101 @Fold 102 public static ResolvedJavaType getObjectType(@Fold.InjectedParameter MetaAccessProvider metaAccesss) { 103 return metaAccesss.lookupJavaType(Object.class); 104 } 105 106 @MethodSubstitution(isStatic = false) 107 public static Class<?> getSuperclass(final Class<?> thisObj) { 108 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 109 if (!klass.isNull()) { 110 KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); 111 int accessFlags = klassNonNull.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION); 112 if ((accessFlags & Modifier.INTERFACE) == 0) { 113 if (klassIsArray(klassNonNull)) { 114 return ConstantNode.forClass(getObjectType(INJECTED_METAACCESS)); 115 } else { 116 KlassPointer superKlass = klassNonNull.readKlassPointer(klassSuperKlassOffset(INJECTED_VMCONFIG), KLASS_SUPER_KLASS_LOCATION); 117 if (superKlass.isNull()) { 118 return null; 119 } else { 120 KlassPointer superKlassNonNull = ClassGetHubNode.piCastNonNull(superKlass, SnippetAnchorNode.anchor()); 121 return HubGetClassNode.readClass(superKlassNonNull); 122 } 123 } 124 } 125 } else { 126 // Class for primitive type 127 } 128 return null; 129 } 130 131 @MethodSubstitution(isStatic = false) 132 public static Class<?> getComponentType(final Class<?> thisObj) { 133 KlassPointer klass = ClassGetHubNode.readClass(thisObj); 134 if (!klass.isNull()) { 135 KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); 136 if (klassIsArray(klassNonNull)) { 137 return PiNode.asNonNullClass(klassNonNull.readObject(arrayKlassComponentMirrorOffset(INJECTED_VMCONFIG), ARRAY_KLASS_COMPONENT_MIRROR)); 138 } 139 } else { 140 // Class for primitive type 141 } 142 return null; 143 } 144 }