ReflectionSubstitutions.java revision 12657:6ef01bd40ce2 
1/*
2 * Copyright (c) 2013, 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 */
23package org.graalvm.compiler.hotspot.replacements;
24
25import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
26import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION;
27import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.jvmAccWrittenFlags;
28import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset;
29
30import java.lang.reflect.Modifier;
31
32import org.graalvm.compiler.api.directives.GraalDirectives;
33import org.graalvm.compiler.api.replacements.ClassSubstitution;
34import org.graalvm.compiler.api.replacements.MethodSubstitution;
35import org.graalvm.compiler.hotspot.word.KlassPointer;
36
37/**
38 * Substitutions for {@link sun.reflect.Reflection} methods.
39 */
40@ClassSubstitution(className = {"jdk.internal.reflect.Reflection", "sun.reflect.Reflection"}, optional = true)
41public class ReflectionSubstitutions {
42
43    @MethodSubstitution
44    public static int getClassAccessFlags(Class<?> aClass) {
45        KlassPointer klass = ClassGetHubNode.readClass(GraalDirectives.guardingNonNull(aClass));
46        if (klass.isNull()) {
47            // Class for primitive type
48            return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC;
49        } else {
50            return klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION) & jvmAccWrittenFlags(INJECTED_VMCONFIG);
51        }
52    }
53}
54