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 sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.runtime.VM; 29 import sun.jvm.hotspot.runtime.VMObject; 30 31 // The class for an oop field simply provides access to the value. 32 public class OopField extends Field { 33 public OopField(FieldIdentifier id, long offset, boolean isVMField) { 34 super(id, offset, isVMField); 35 } 36 37 public OopField(sun.jvm.hotspot.types.OopField vmField, long startOffset) { 38 super(new NamedFieldIdentifier(vmField.getName()), vmField.getOffset() + startOffset, true); 39 } 40 41 public OopField(InstanceKlass holder, int fieldArrayIndex) { 42 super(holder, fieldArrayIndex); 43 } 44 45 public Oop getValue(Oop obj) { 46 if (!isVMField() && !obj.isInstance() && !obj.isArray()) { 47 throw new InternalError(); 48 } 49 return obj.getHeap().newOop(getValueAsOopHandle(obj)); 50 } 51 52 /** Debugging support */ 53 public OopHandle getValueAsOopHandle(Oop obj) { 54 if (!isVMField() && !obj.isInstance() && !obj.isArray()) { 55 throw new InternalError(obj.toString()); 56 } 57 58 return VM.getVM().getUniverse().heap().oop_load_at(obj.getHandle(), getOffset()); 59 } 60 61 public Oop getValue(VMObject obj) { 62 return VM.getVM().getObjectHeap().newOop(getValueAsOopHandle(obj)); 63 } 64 65 /** Debugging support */ 66 public OopHandle getValueAsOopHandle(VMObject obj) { 67 return obj.getAddress().getOopHandleAt(getOffset()); 68 } 69 70 public void setValue(Oop obj) throws MutationException { 71 // Fix this: setOopAt is missing in Address 72 } 73 }