1 /* 2 * Copyright (c) 2000, 2012, 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 */ 24 25 package sun.jvm.hotspot.oops; 26 27 import java.io.*; 28 import java.util.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.runtime.*; 31 import sun.jvm.hotspot.types.*; 32 import sun.jvm.hotspot.utilities.*; 33 34 // ObjArrayKlass is the klass for ObjArrays 35 36 public class ObjArrayKlass extends ArrayKlass { 37 static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } })38 VM.registerVMInitializedObserver(new Observer() { 39 public void update(Observable o, Object data) { 40 initialize(VM.getVM().getTypeDataBase()); 41 } 42 }); 43 } 44 initialize(TypeDataBase db)45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 46 Type type = db.lookupType("ObjArrayKlass"); 47 elementKlass = new MetadataField(type.getAddressField("_element_klass"), 0); 48 bottomKlass = new MetadataField(type.getAddressField("_bottom_klass"), 0); 49 } 50 ObjArrayKlass(Address addr)51 public ObjArrayKlass(Address addr) { 52 super(addr); 53 } 54 55 private static MetadataField elementKlass; 56 private static MetadataField bottomKlass; 57 getElementKlass()58 public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); } getBottomKlass()59 public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); } 60 computeModifierFlags()61 public long computeModifierFlags() { 62 long elementFlags = getElementKlass().computeModifierFlags(); 63 long arrayFlags = 0L; 64 if ((elementFlags & (JVM_ACC_PUBLIC | JVM_ACC_PROTECTED)) != 0) { 65 // The array type is public if the component type is public or protected 66 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 67 } else { 68 // The array type is private if the component type is private 69 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL; 70 } 71 return arrayFlags; 72 } 73 iterateFields(MetadataVisitor visitor)74 public void iterateFields(MetadataVisitor visitor) { 75 super.iterateFields(visitor); 76 visitor.doMetadata(elementKlass, true); 77 visitor.doMetadata(bottomKlass, true); 78 } 79 arrayKlassImpl(boolean orNull, int n)80 public Klass arrayKlassImpl(boolean orNull, int n) { 81 if (Assert.ASSERTS_ENABLED) { 82 Assert.that(getDimension() <= n, "check order of chain"); 83 } 84 int dimension = (int) getDimension(); 85 if (dimension == n) { 86 return this; 87 } 88 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension(); 89 if (ak == null) { 90 if (orNull) return null; 91 // FIXME: would need to change in reflective system to actually 92 // allocate klass 93 throw new RuntimeException("Can not allocate array klasses in debugging system"); 94 } 95 96 if (orNull) { 97 return ak.arrayKlassOrNull(n); 98 } 99 return ak.arrayKlass(n); 100 } 101 arrayKlassImpl(boolean orNull)102 public Klass arrayKlassImpl(boolean orNull) { 103 return arrayKlassImpl(orNull, (int) (getDimension() + 1)); 104 } 105 printValueOn(PrintStream tty)106 public void printValueOn(PrintStream tty) { 107 tty.print("ObjArrayKlass for "); 108 getElementKlass().printValueOn(tty); 109 } 110 }; 111