Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/oops/ObjArrayKlass.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/ObjArrayKlass.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,112 @@ +/* + * Copyright 2000-2004 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.debugger.*; +import sun.jvm.hotspot.runtime.*; +import sun.jvm.hotspot.types.*; +import sun.jvm.hotspot.utilities.*; + +// ObjArrayKlass is the klass for ObjArrays + +public class ObjArrayKlass extends ArrayKlass { + 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("objArrayKlass"); + elementKlass = new OopField(type.getOopField("_element_klass"), Oop.getHeaderSize()); + bottomKlass = new OopField(type.getOopField("_bottom_klass"), Oop.getHeaderSize()); + } + + ObjArrayKlass(OopHandle handle, ObjectHeap heap) { + super(handle, heap); + } + + private static OopField elementKlass; + private static OopField bottomKlass; + + public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); } + public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); } + + public long computeModifierFlags() { + long elementFlags = getElementKlass().computeModifierFlags(); + long arrayFlags = 0L; + if ((elementFlags & (JVM_ACC_PUBLIC | JVM_ACC_PROTECTED)) != 0) { + // The array type is public if the component type is public or protected + arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; + } else { + // The array type is private if the component type is private + arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL; + } + return arrayFlags; + } + + public void iterateFields(OopVisitor visitor, boolean doVMFields) { + super.iterateFields(visitor, doVMFields); + if (doVMFields) { + visitor.doOop(elementKlass, true); + visitor.doOop(bottomKlass, true); + } + } + + public Klass arrayKlassImpl(boolean orNull, int n) { + if (Assert.ASSERTS_ENABLED) { + Assert.that(getDimension() <= n, "check order of chain"); + } + int dimension = (int) getDimension(); + if (dimension == n) { + return this; + } + ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension(); + if (ak == null) { + if (orNull) return null; + // FIXME: would need to change in reflective system to actually + // allocate klass + throw new RuntimeException("Can not allocate array klasses in debugging system"); + } + + if (orNull) { + return ak.arrayKlassOrNull(n); + } + return ak.arrayKlass(n); + } + + public Klass arrayKlassImpl(boolean orNull) { + return arrayKlassImpl(orNull, (int) (getDimension() + 1)); + } + + public void printValueOn(PrintStream tty) { + tty.print("ObjArrayKlass for "); + getElementKlass().printValueOn(tty); + } +};