Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/oops/ArrayKlass.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/oops/ArrayKlass.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,159 @@ +/* + * Copyright 2000-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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"), Oop.getHeaderSize()); + higherDimension = new OopField(type.getOopField("_higher_dimension"), Oop.getHeaderSize()); + lowerDimension = new OopField(type.getOopField("_lower_dimension"), Oop.getHeaderSize()); + vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), Oop.getHeaderSize()); + allocSize = new CIntField(type.getCIntegerField("_alloc_size"), Oop.getHeaderSize()); + componentMirror = new OopField(type.getOopField("_component_mirror"), Oop.getHeaderSize()); + javaLangCloneableName = null; + javaLangObjectName = null; + javaIoSerializableName = null; + } + + ArrayKlass(OopHandle handle, ObjectHeap heap) { + super(handle, heap); + } + + private static CIntField dimension; + private static OopField higherDimension; + private static OopField lowerDimension; + private static CIntField vtableLen; + private static CIntField allocSize; + 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 long getAllocSize() { return allocSize.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 long getObjectSize() { + return alignObjectSize(InstanceKlass.getHeaderSize() + getVtableLen() * getHeap().getOopSize()); + } + + public void iterateFields(OopVisitor visitor, boolean doVMFields) { + super.iterateFields(visitor, doVMFields); + if (doVMFields) { + visitor.doCInt(dimension, true); + visitor.doOop(higherDimension, true); + visitor.doOop(lowerDimension, true); + visitor.doCInt(vtableLen, true); + visitor.doCInt(allocSize, true); + visitor.doOop(componentMirror, true); + } + } +}