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 */ 23 package org.graalvm.compiler.hotspot.replacements; 24 25 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; 26 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION; 27 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.jvmAccWrittenFlags; 28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset; 29 30 import java.lang.reflect.Modifier; 31 32 import org.graalvm.compiler.api.directives.GraalDirectives; 33 import org.graalvm.compiler.api.replacements.ClassSubstitution; 34 import org.graalvm.compiler.api.replacements.MethodSubstitution; 35 import 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) 41 public 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 }