Mercurial > hg > truffle

comparison agent/src/share/classes/sun/jvm/hotspot/memory/Universe.java @ 642:660978a2a31a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6791178: Specialize for zero as the compressed oop vm heap base Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb. Reviewed-by: never, twisti, jcoomes, coleenp
author kvn
date Thu, 12 Mar 2009 10:37:46 -0700
parents d1605aabd0a1
children bd02caa94611
comparison
equal deleted inserted replaced
641:6af0a709d52b 642:660978a2a31a
51 private static sun.jvm.hotspot.types.OopField doubleArrayKlassObjField; 51 private static sun.jvm.hotspot.types.OopField doubleArrayKlassObjField;
52 52
53 // system obj array klass object 53 // system obj array klass object
54 private static sun.jvm.hotspot.types.OopField systemObjArrayKlassObjField; 54 private static sun.jvm.hotspot.types.OopField systemObjArrayKlassObjField;
55 55
56 private static AddressField heapBaseField; 56 private static AddressField narrowOopBaseField;
57 private static CIntegerField narrowOopShiftField;
57 58
58 static { 59 static {
59 VM.registerVMInitializedObserver(new Observer() { 60 VM.registerVMInitializedObserver(new Observer() {
60 public void update(Observable o, Object data) { 61 public void update(Observable o, Object data) {
61 initialize(VM.getVM().getTypeDataBase()); 62 initialize(VM.getVM().getTypeDataBase());
84 singleArrayKlassObjField = type.getOopField("_singleArrayKlassObj"); 85 singleArrayKlassObjField = type.getOopField("_singleArrayKlassObj");
85 doubleArrayKlassObjField = type.getOopField("_doubleArrayKlassObj"); 86 doubleArrayKlassObjField = type.getOopField("_doubleArrayKlassObj");
86 87
87 systemObjArrayKlassObjField = type.getOopField("_systemObjArrayKlassObj"); 88 systemObjArrayKlassObjField = type.getOopField("_systemObjArrayKlassObj");
88 89
89 heapBaseField = type.getAddressField("_heap_base"); 90 narrowOopBaseField = type.getAddressField("_narrow_oop._base");
91 narrowOopShiftField = type.getCIntegerField("_narrow_oop._shift");
90 } 92 }
91 93
92 public Universe() { 94 public Universe() {
93 } 95 }
94 96
98 } catch (WrongTypeException e) { 100 } catch (WrongTypeException e) {
99 return new CollectedHeap(collectedHeapField.getValue()); 101 return new CollectedHeap(collectedHeapField.getValue());
100 } 102 }
101 } 103 }
102 104
103 public static long getHeapBase() { 105 public static long getNarrowOopBase() {
104 if (heapBaseField.getValue() == null) { 106 if (narrowOopBaseField.getValue() == null) {
105 return 0; 107 return 0;
106 } else { 108 } else {
107 return heapBaseField.getValue().minus(null); 109 return narrowOopBaseField.getValue().minus(null);
108 } 110 }
111 }
112
113 public static int getNarrowOopShift() {
114 return (int)narrowOopShiftField.getValue();
109 } 115 }
110 116
111 /** Returns "TRUE" iff "p" points into the allocated area of the heap. */ 117 /** Returns "TRUE" iff "p" points into the allocated area of the heap. */
112 public boolean isIn(Address p) { 118 public boolean isIn(Address p) {
113 return heap().isIn(p); 119 return heap().isIn(p);