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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 {
OopField(FieldIdentifier id, long offset, boolean isVMField)33   public OopField(FieldIdentifier id, long offset, boolean isVMField) {
34     super(id, offset, isVMField);
35   }
36 
OopField(sun.jvm.hotspot.types.OopField vmField, long startOffset)37   public OopField(sun.jvm.hotspot.types.OopField vmField, long startOffset) {
38     super(new NamedFieldIdentifier(vmField.getName()), vmField.getOffset() + startOffset, true);
39   }
40 
OopField(InstanceKlass holder, int fieldArrayIndex)41   public OopField(InstanceKlass holder, int fieldArrayIndex) {
42     super(holder, fieldArrayIndex);
43   }
44 
getValue(Oop obj)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 */
getValueAsOopHandle(Oop obj)53   public OopHandle getValueAsOopHandle(Oop obj) {
54     if (!isVMField() && !obj.isInstance() && !obj.isArray()) {
55       throw new InternalError(obj.toString());
56     }
57     return obj.getHandle().getOopHandleAt(getOffset());
58   }
59 
getValue(VMObject obj)60   public Oop getValue(VMObject obj) {
61     return VM.getVM().getObjectHeap().newOop(getValueAsOopHandle(obj));
62   }
63 
64   /** Debugging support */
getValueAsOopHandle(VMObject obj)65   public OopHandle getValueAsOopHandle(VMObject obj) {
66     return obj.getAddress().getOopHandleAt(getOffset());
67   }
68 
setValue(Oop obj)69   public void setValue(Oop obj) throws MutationException {
70     // Fix this: setOopAt is missing in Address
71   }
72 }
73