| /* |
| * Copyright (c) 2000, 2013, 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.oops; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.utilities.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.memory.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| |
| // ArrayKlass is the abstract class for all array classes |
| |
| public class ArrayKlass extends Klass { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("ArrayKlass"); |
| dimension = new CIntField(type.getCIntegerField("_dimension"), 0); |
| higherDimension = new MetadataField(type.getAddressField("_higher_dimension"), 0); |
| lowerDimension = new MetadataField(type.getAddressField("_lower_dimension"), 0); |
| vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0); |
| componentMirror = new OopField(type.getOopField("_component_mirror"), 0); |
| javaLangCloneableName = null; |
| javaLangObjectName = null; |
| javaIoSerializableName = null; |
| } |
| |
| public ArrayKlass(Address addr) { |
| super(addr); |
| } |
| |
| private static CIntField dimension; |
| private static MetadataField higherDimension; |
| private static MetadataField lowerDimension; |
| private static CIntField vtableLen; |
| private static OopField componentMirror; |
| |
| public Klass getJavaSuper() { |
| SystemDictionary sysDict = VM.getVM().getSystemDictionary(); |
| return sysDict.getObjectKlass(); |
| } |
| |
| public long getDimension() { return dimension.getValue(this); } |
| public Klass getHigherDimension() { return (Klass) higherDimension.getValue(this); } |
| public Klass getLowerDimension() { return (Klass) lowerDimension.getValue(this); } |
| public long getVtableLen() { return vtableLen.getValue(this); } |
| public Oop getComponentMirror() { return componentMirror.getValue(this); } |
| |
| // constant class names - javaLangCloneable, javaIoSerializable, javaLangObject |
| // Initialized lazily to avoid initialization ordering dependencies between ArrayKlass and SymbolTable |
| private static Symbol javaLangCloneableName; |
| private static Symbol javaLangObjectName; |
| private static Symbol javaIoSerializableName; |
| private static Symbol javaLangCloneableName() { |
| if (javaLangCloneableName == null) { |
| javaLangCloneableName = VM.getVM().getSymbolTable().probe("java/lang/Cloneable"); |
| } |
| return javaLangCloneableName; |
| } |
| |
| private static Symbol javaLangObjectName() { |
| if (javaLangObjectName == null) { |
| javaLangObjectName = VM.getVM().getSymbolTable().probe("java/lang/Object"); |
| } |
| return javaLangObjectName; |
| } |
| |
| private static Symbol javaIoSerializableName() { |
| if (javaIoSerializableName == null) { |
| javaIoSerializableName = VM.getVM().getSymbolTable().probe("java/io/Serializable"); |
| } |
| return javaIoSerializableName; |
| } |
| |
| public int getClassStatus() { |
| return JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED | JVMDIClassStatus.INITIALIZED; |
| } |
| |
| public long computeModifierFlags() { |
| return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; |
| } |
| |
| public long getArrayHeaderInBytes() { |
| return Bits.maskBits(getLayoutHelper() >> LH_HEADER_SIZE_SHIFT, 0xFF); |
| } |
| |
| public int getLog2ElementSize() { |
| return Bits.maskBits(getLayoutHelper() >> LH_LOG2_ELEMENT_SIZE_SHIFT, 0xFF); |
| } |
| |
| public int getElementType() { |
| return Bits.maskBits(getLayoutHelper() >> LH_ELEMENT_TYPE_SHIFT, 0xFF); |
| } |
| |
| boolean computeSubtypeOf(Klass k) { |
| // An array is a subtype of Serializable, Clonable, and Object |
| Symbol name = k.getName(); |
| if (name != null && (name.equals(javaIoSerializableName()) || |
| name.equals(javaLangCloneableName()) || |
| name.equals(javaLangObjectName()))) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| public void printValueOn(PrintStream tty) { |
| tty.print("ArrayKlass"); |
| } |
| |
| public void iterateFields(MetadataVisitor visitor) { |
| super.iterateFields(visitor); |
| visitor.doCInt(dimension, true); |
| visitor.doMetadata(higherDimension, true); |
| visitor.doMetadata(lowerDimension, true); |
| visitor.doCInt(vtableLen, true); |
| visitor.doOop(componentMirror, true); |
| } |
| } |