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comparison agent/src/share/classes/sun/jvm/hotspot/oops/ObjArray.java @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
41 }); 41 });
42 } 42 }
43 43
44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
45 Type type = db.lookupType("objArrayOopDesc"); 45 Type type = db.lookupType("objArrayOopDesc");
46 elementSize = db.getOopSize(); 46 elementSize = VM.getVM().getHeapOopSize();
47 } 47 }
48 48
49 ObjArray(OopHandle handle, ObjectHeap heap) { 49 ObjArray(OopHandle handle, ObjectHeap heap) {
50 super(handle, heap); 50 super(handle, heap);
51 } 51 }
52 52
53 public boolean isObjArray() { return true; } 53 public boolean isObjArray() { return true; }
54 54
55 private static long elementSize; 55 private static long elementSize;
56 56
57 public OopHandle getOopHandleAt(long index) {
58 long offset = baseOffsetInBytes(BasicType.T_OBJECT) + (index * elementSize);
59 if (VM.getVM().isCompressedOopsEnabled()) {
60 return getHandle().getCompOopHandleAt(offset);
61 } else {
62 return getHandle().getOopHandleAt(offset);
63 }
64 }
65
57 public Oop getObjAt(long index) { 66 public Oop getObjAt(long index) {
58 long offset = baseOffsetInBytes(BasicType.T_OBJECT) + (index * elementSize); 67 return getHeap().newOop(getOopHandleAt(index));
59 return getHeap().newOop(getHandle().getOopHandleAt(offset));
60 } 68 }
61 69
62 public void printValueOn(PrintStream tty) { 70 public void printValueOn(PrintStream tty) {
63 tty.print("ObjArray"); 71 tty.print("ObjArray");
64 } 72 }
67 super.iterateFields(visitor, doVMFields); 75 super.iterateFields(visitor, doVMFields);
68 int length = (int) getLength(); 76 int length = (int) getLength();
69 long baseOffset = baseOffsetInBytes(BasicType.T_OBJECT); 77 long baseOffset = baseOffsetInBytes(BasicType.T_OBJECT);
70 for (int index = 0; index < length; index++) { 78 for (int index = 0; index < length; index++) {
71 long offset = baseOffset + (index * elementSize); 79 long offset = baseOffset + (index * elementSize);
72 visitor.doOop(new OopField(new IndexableFieldIdentifier(index), offset, false), false); 80 OopField field;
81 if (VM.getVM().isCompressedOopsEnabled()) {
82 field = new NarrowOopField(new IndexableFieldIdentifier(index), offset, false);
83 } else {
84 field = new OopField(new IndexableFieldIdentifier(index), offset, false);
85 }
86 visitor.doOop(field, false);
73 } 87 }
74 } 88 }
75 } 89 }