agent/src/share/classes/sun/jvm/hotspot/memory/Universe.java

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rev 3688 : 7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by:


  36 
  37 
  38 public class Universe {
  39   private static AddressField collectedHeapField;
  40   private static VirtualConstructor heapConstructor;
  41   private static sun.jvm.hotspot.types.OopField mainThreadGroupField;
  42   private static sun.jvm.hotspot.types.OopField systemThreadGroupField;
  43 
  44   // single dimensional primitive array klasses
  45   private static sun.jvm.hotspot.types.AddressField boolArrayKlassField;
  46   private static sun.jvm.hotspot.types.AddressField byteArrayKlassField;
  47   private static sun.jvm.hotspot.types.AddressField charArrayKlassField;
  48   private static sun.jvm.hotspot.types.AddressField intArrayKlassField;
  49   private static sun.jvm.hotspot.types.AddressField shortArrayKlassField;
  50   private static sun.jvm.hotspot.types.AddressField longArrayKlassField;
  51   private static sun.jvm.hotspot.types.AddressField singleArrayKlassField;
  52   private static sun.jvm.hotspot.types.AddressField doubleArrayKlassField;
  53 
  54   private static AddressField narrowOopBaseField;
  55   private static CIntegerField narrowOopShiftField;


  56 
  57   static {
  58     VM.registerVMInitializedObserver(new Observer() {
  59         public void update(Observable o, Object data) {
  60           initialize(VM.getVM().getTypeDataBase());
  61         }
  62       });
  63   }
  64 
  65   private static synchronized void initialize(TypeDataBase db) {
  66     Type type = db.lookupType("Universe");
  67 
  68     collectedHeapField = type.getAddressField("_collectedHeap");
  69 
  70     heapConstructor = new VirtualConstructor(db);
  71     heapConstructor.addMapping("GenCollectedHeap", GenCollectedHeap.class);
  72     heapConstructor.addMapping("ParallelScavengeHeap", ParallelScavengeHeap.class);
  73     heapConstructor.addMapping("G1CollectedHeap", G1CollectedHeap.class);
  74 
  75     mainThreadGroupField   = type.getOopField("_main_thread_group");
  76     systemThreadGroupField = type.getOopField("_system_thread_group");
  77 
  78     boolArrayKlassField      = type.getAddressField("_boolArrayKlassObj");
  79     byteArrayKlassField      = type.getAddressField("_byteArrayKlassObj");
  80     charArrayKlassField      = type.getAddressField("_charArrayKlassObj");
  81     intArrayKlassField       = type.getAddressField("_intArrayKlassObj");
  82     shortArrayKlassField     = type.getAddressField("_shortArrayKlassObj");
  83     longArrayKlassField      = type.getAddressField("_longArrayKlassObj");
  84     singleArrayKlassField    = type.getAddressField("_singleArrayKlassObj");
  85     doubleArrayKlassField    = type.getAddressField("_doubleArrayKlassObj");
  86 
  87     narrowOopBaseField = type.getAddressField("_narrow_oop._base");
  88     narrowOopShiftField = type.getCIntegerField("_narrow_oop._shift");


  89   }
  90 
  91   public Universe() {
  92   }
  93 
  94   public CollectedHeap heap() {
  95     try {
  96       return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue());
  97     } catch (WrongTypeException e) {
  98       return new CollectedHeap(collectedHeapField.getValue());
  99     }
 100   }
 101 
 102   public static long getNarrowOopBase() {
 103     if (narrowOopBaseField.getValue() == null) {
 104       return 0;
 105     } else {
 106       return narrowOopBaseField.getValue().minus(null);
 107     }
 108   }
 109 
 110   public static int getNarrowOopShift() {
 111     return (int)narrowOopShiftField.getValue();
 112   }













 113 
 114   /** Returns "TRUE" iff "p" points into the allocated area of the heap. */
 115   public boolean isIn(Address p) {
 116     return heap().isIn(p);
 117   }
 118 
 119   /** Returns "TRUE" iff "p" points into the reserved area of the heap. */
 120   public boolean isInReserved(Address p) {
 121     return heap().isInReserved(p);
 122   }
 123 
 124   private Oop newOop(OopHandle handle) {
 125     return VM.getVM().getObjectHeap().newOop(handle);
 126   }
 127 
 128   public Oop mainThreadGroup() {
 129     return newOop(mainThreadGroupField.getValue());
 130   }
 131 
 132   public Oop systemThreadGroup() {




  36 
  37 
  38 public class Universe {
  39   private static AddressField collectedHeapField;
  40   private static VirtualConstructor heapConstructor;
  41   private static sun.jvm.hotspot.types.OopField mainThreadGroupField;
  42   private static sun.jvm.hotspot.types.OopField systemThreadGroupField;
  43 
  44   // single dimensional primitive array klasses
  45   private static sun.jvm.hotspot.types.AddressField boolArrayKlassField;
  46   private static sun.jvm.hotspot.types.AddressField byteArrayKlassField;
  47   private static sun.jvm.hotspot.types.AddressField charArrayKlassField;
  48   private static sun.jvm.hotspot.types.AddressField intArrayKlassField;
  49   private static sun.jvm.hotspot.types.AddressField shortArrayKlassField;
  50   private static sun.jvm.hotspot.types.AddressField longArrayKlassField;
  51   private static sun.jvm.hotspot.types.AddressField singleArrayKlassField;
  52   private static sun.jvm.hotspot.types.AddressField doubleArrayKlassField;
  53 
  54   private static AddressField narrowOopBaseField;
  55   private static CIntegerField narrowOopShiftField;
  56   private static AddressField narrowKlassBaseField;
  57   private static CIntegerField narrowKlassShiftField;
  58 
  59   static {
  60     VM.registerVMInitializedObserver(new Observer() {
  61         public void update(Observable o, Object data) {
  62           initialize(VM.getVM().getTypeDataBase());
  63         }
  64       });
  65   }
  66 
  67   private static synchronized void initialize(TypeDataBase db) {
  68     Type type = db.lookupType("Universe");
  69 
  70     collectedHeapField = type.getAddressField("_collectedHeap");
  71 
  72     heapConstructor = new VirtualConstructor(db);
  73     heapConstructor.addMapping("GenCollectedHeap", GenCollectedHeap.class);
  74     heapConstructor.addMapping("ParallelScavengeHeap", ParallelScavengeHeap.class);
  75     heapConstructor.addMapping("G1CollectedHeap", G1CollectedHeap.class);
  76 
  77     mainThreadGroupField   = type.getOopField("_main_thread_group");
  78     systemThreadGroupField = type.getOopField("_system_thread_group");
  79 
  80     boolArrayKlassField      = type.getAddressField("_boolArrayKlassObj");
  81     byteArrayKlassField      = type.getAddressField("_byteArrayKlassObj");
  82     charArrayKlassField      = type.getAddressField("_charArrayKlassObj");
  83     intArrayKlassField       = type.getAddressField("_intArrayKlassObj");
  84     shortArrayKlassField     = type.getAddressField("_shortArrayKlassObj");
  85     longArrayKlassField      = type.getAddressField("_longArrayKlassObj");
  86     singleArrayKlassField    = type.getAddressField("_singleArrayKlassObj");
  87     doubleArrayKlassField    = type.getAddressField("_doubleArrayKlassObj");
  88 
  89     narrowOopBaseField = type.getAddressField("_narrow_oop._base");
  90     narrowOopShiftField = type.getCIntegerField("_narrow_oop._shift");
  91     narrowKlassBaseField = type.getAddressField("_narrow_klass._base");
  92     narrowKlassShiftField = type.getCIntegerField("_narrow_klass._shift");
  93   }
  94 
  95   public Universe() {
  96   }
  97 
  98   public CollectedHeap heap() {
  99     try {
 100       return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue());
 101     } catch (WrongTypeException e) {
 102       return new CollectedHeap(collectedHeapField.getValue());
 103     }
 104   }
 105 
 106   public static long getNarrowOopBase() {
 107     if (narrowOopBaseField.getValue() == null) {
 108       return 0;
 109     } else {
 110       return narrowOopBaseField.getValue().minus(null);
 111     }
 112   }
 113 
 114   public static int getNarrowOopShift() {
 115     return (int)narrowOopShiftField.getValue();
 116   }
 117 
 118   public static long getNarrowKlassBase() {
 119     if (narrowKlassBaseField.getValue() == null) {
 120       return 0;
 121     } else {
 122       return narrowKlassBaseField.getValue().minus(null);
 123     }
 124   }
 125 
 126   public static int getNarrowKlassShift() {
 127     return (int)narrowKlassShiftField.getValue();
 128   }
 129 
 130 
 131   /** Returns "TRUE" iff "p" points into the allocated area of the heap. */
 132   public boolean isIn(Address p) {
 133     return heap().isIn(p);
 134   }
 135 
 136   /** Returns "TRUE" iff "p" points into the reserved area of the heap. */
 137   public boolean isInReserved(Address p) {
 138     return heap().isInReserved(p);
 139   }
 140 
 141   private Oop newOop(OopHandle handle) {
 142     return VM.getVM().getObjectHeap().newOop(handle);
 143   }
 144 
 145   public Oop mainThreadGroup() {
 146     return newOop(mainThreadGroupField.getValue());
 147   }
 148 
 149   public Oop systemThreadGroup() {