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 * Copyright (c) 2012, 2014, 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.
 *
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package org.graalvm.compiler.hotspot.replacements;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.ARRAY_KLASS_COMPONENT_MIRROR;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_MODIFIER_FLAGS_LOCATION;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_SUPER_KLASS_LOCATION;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassComponentMirrorOffset;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassIsArray;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassModifierFlagsOffset;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassSuperKlassOffset;

import java.lang.reflect.Modifier;

import org.graalvm.compiler.api.replacements.ClassSubstitution;
import org.graalvm.compiler.api.replacements.MethodSubstitution;
import org.graalvm.compiler.hotspot.word.KlassPointer;
import org.graalvm.compiler.nodes.PiNode;
import org.graalvm.compiler.nodes.SnippetAnchorNode;

// JaCoCo Exclude

Substitutions for Class methods.
/** * Substitutions for {@link java.lang.Class} methods. */
@ClassSubstitution(Class.class) public class HotSpotClassSubstitutions { @MethodSubstitution(isStatic = false) public static int getModifiers(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); if (klass.isNull()) { // Class for primitive type return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC; } else { return klass.readInt(klassModifierFlagsOffset(INJECTED_VMCONFIG), KLASS_MODIFIER_FLAGS_LOCATION); } } @MethodSubstitution(isStatic = false) public static boolean isInterface(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); if (klass.isNull()) { // Class for primitive type return false; } else { int accessFlags = klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION); return (accessFlags & Modifier.INTERFACE) != 0; } } @MethodSubstitution(isStatic = false) public static boolean isArray(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); if (klass.isNull()) { // Class for primitive type return false; } else { KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); return klassIsArray(klassNonNull); } } @MethodSubstitution(isStatic = false) public static boolean isPrimitive(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); return klass.isNull(); } @MethodSubstitution(isStatic = false) public static Class<?> getSuperclass(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); if (!klass.isNull()) { KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); int accessFlags = klassNonNull.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION); if ((accessFlags & Modifier.INTERFACE) == 0) { if (klassIsArray(klassNonNull)) { return Object.class; } else { KlassPointer superKlass = klassNonNull.readKlassPointer(klassSuperKlassOffset(INJECTED_VMCONFIG), KLASS_SUPER_KLASS_LOCATION); if (superKlass.isNull()) { return null; } else { KlassPointer superKlassNonNull = ClassGetHubNode.piCastNonNull(superKlass, SnippetAnchorNode.anchor()); return HubGetClassNode.readClass(superKlassNonNull); } } } } else { // Class for primitive type } return null; } @MethodSubstitution(isStatic = false) public static Class<?> getComponentType(final Class<?> thisObj) { KlassPointer klass = ClassGetHubNode.readClass(thisObj); if (!klass.isNull()) { KlassPointer klassNonNull = ClassGetHubNode.piCastNonNull(klass, SnippetAnchorNode.anchor()); if (klassIsArray(klassNonNull)) { return PiNode.asNonNullClass(klassNonNull.readObject(arrayKlassComponentMirrorOffset(INJECTED_VMCONFIG), ARRAY_KLASS_COMPONENT_MIRROR)); } } else { // Class for primitive type } return null; } }