001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.replacements;
024
025import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
026
027import java.lang.reflect.*;
028
029import com.oracle.graal.api.directives.*;
030import com.oracle.graal.api.replacements.*;
031import com.oracle.graal.hotspot.word.*;
032
033/**
034 * Substitutions for {@link sun.reflect.Reflection} methods.
035 */
036@ClassSubstitution(sun.reflect.Reflection.class)
037public class ReflectionSubstitutions {
038
039    @MethodSubstitution
040    public static int getClassAccessFlags(Class<?> aClass) {
041        KlassPointer klass = ClassGetHubNode.readClass(GraalDirectives.guardingNonNull(aClass));
042        if (klass.isNull()) {
043            // Class for primitive type
044            return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC;
045        } else {
046            return klass.readInt(klassAccessFlagsOffset(), KLASS_ACCESS_FLAGS_LOCATION) & jvmAccWrittenFlags();
047        }
048    }
049}