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/*
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* Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.hotspot.replacements;
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import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.ARRAY_KLASS_COMPONENT_MIRROR;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_MODIFIER_FLAGS_LOCATION;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_SUPER_KLASS_LOCATION;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassComponentMirrorOffset;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassIsArray;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassModifierFlagsOffset;
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import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassSuperKlassOffset;
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import java.lang.reflect.Modifier;
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import org.graalvm.compiler.api.replacements.ClassSubstitution;
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import org.graalvm.compiler.api.replacements.MethodSubstitution;
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import org.graalvm.compiler.hotspot.word.KlassPointer;
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import org.graalvm.compiler.nodes.PiNode;
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import org.graalvm.compiler.nodes.SnippetAnchorNode;
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// JaCoCo Exclude
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/**
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* Substitutions for {@link java.lang.Class} methods.
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*/
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@ClassSubstitution(Class.class)
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public class HotSpotClassSubstitutions {
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@MethodSubstitution(isStatic = false)
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public static int getModifiers(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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if (klass.isNull()) {
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// Class for primitive type
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return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC;
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} else {
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return klass.readInt(klassModifierFlagsOffset(INJECTED_VMCONFIG), KLASS_MODIFIER_FLAGS_LOCATION);
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}
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}
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@MethodSubstitution(isStatic = false)
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public static boolean isInterface(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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if (klass.isNull()) {
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// Class for primitive type
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return false;
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} else {
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int accessFlags = klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION);
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return (accessFlags & Modifier.INTERFACE) != 0;
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}
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}
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@MethodSubstitution(isStatic = false)
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public static boolean isArray(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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if (klass.isNull()) {
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// Class for primitive type
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return false;
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} else {
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KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor());
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return klassIsArray(klassNonNull);
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}
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}
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@MethodSubstitution(isStatic = false)
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public static boolean isPrimitive(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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return klass.isNull();
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}
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@MethodSubstitution(isStatic = false)
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public static Class<?> getSuperclass(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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if (!klass.isNull()) {
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KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor());
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int accessFlags = klassNonNull.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION);
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if ((accessFlags & Modifier.INTERFACE) == 0) {
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if (klassIsArray(klassNonNull)) {
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return Object.class;
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} else {
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KlassPointer superKlass = klassNonNull.readKlassPointer(klassSuperKlassOffset(INJECTED_VMCONFIG), KLASS_SUPER_KLASS_LOCATION);
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if (superKlass.isNull()) {
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return null;
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} else {
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KlassPointer superKlassNonNull = ClassGetHubNode.piCastNonNull(superKlass, SnippetAnchorNode.anchor());
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return HubGetClassNode.readClass(superKlassNonNull);
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}
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}
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}
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} else {
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// Class for primitive type
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}
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return null;
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}
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@MethodSubstitution(isStatic = false)
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public static Class<?> getComponentType(final Class<?> thisObj) {
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KlassPointer klass = ClassGetHubNode.readClass(thisObj);
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if (!klass.isNull()) {
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KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor());
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if (klassIsArray(klassNonNull)) {
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return PiNode.asNonNullClass(klassNonNull.readObject(arrayKlassComponentMirrorOffset(INJECTED_VMCONFIG), ARRAY_KLASS_COMPONENT_MIRROR));
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}
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} else {
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// Class for primitive type
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}
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return null;
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}
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}
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