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.memory;
  26 
  27 import java.io.*;
  28 import java.util.*;
  29 
  30 import sun.jvm.hotspot.debugger.*;
  31 import sun.jvm.hotspot.gc_interface.*;
  32 import sun.jvm.hotspot.runtime.*;
  33 import sun.jvm.hotspot.types.*;
  34 import sun.jvm.hotspot.utilities.*;
  35 
  36 public class GenCollectedHeap extends SharedHeap {
  37   private static CIntegerField nGensField;
  38   private static long gensOffset;

  39   private static AddressField genSpecsField;
  40 
  41   private static GenerationFactory genFactory;
  42 
  43   static {
  44     VM.registerVMInitializedObserver(new Observer() {
  45         public void update(Observable o, Object data) {
  46           initialize(VM.getVM().getTypeDataBase());
  47         }
  48       });
  49   }
  50 
  51   private static synchronized void initialize(TypeDataBase db) {
  52     Type type = db.lookupType("GenCollectedHeap");
  53 
  54     nGensField = type.getCIntegerField("_n_gens");
  55     gensOffset = type.getField("_gens").getOffset();

  56     genSpecsField = type.getAddressField("_gen_specs");
  57 
  58     genFactory = new GenerationFactory();
  59   }
  60 
  61   public GenCollectedHeap(Address addr) {
  62     super(addr);
  63   }
  64 
  65   public int nGens() {
  66     return (int) nGensField.getValue(addr);
  67   }
  68 
  69   public Generation getGen(int i) {
  70     if (Assert.ASSERTS_ENABLED) {
  71       Assert.that((i >= 0) && (i < nGens()), "Index " + i +
  72                   " out of range (should be between 0 and " + nGens() + ")");
  73     }
  74 
  75     if ((i < 0) || (i >= nGens())) {
  76       return null;
  77     }
  78 
  79     Address genAddr = addr.getAddressAt(gensOffset +
  80                                         (i * VM.getVM().getAddressSize()));
  81     return genFactory.newObject(addr.getAddressAt(gensOffset +
  82                                                   (i * VM.getVM().getAddressSize())));

  83   }
  84 
  85   public boolean isIn(Address a) {
  86     for (int i = 0; i < nGens(); i++) {
  87       Generation gen = getGen(i);
  88       if (gen.isIn(a)) {
  89         return true;
  90       }
  91     }
  92 
  93     return false;
  94   }
  95 
  96   public long capacity() {
  97     long capacity = 0;
  98     for (int i = 0; i < nGens(); i++) {
  99       capacity += getGen(i).capacity();
 100     }
 101     return capacity;
 102   }

  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.memory;
  26 
  27 import java.io.*;
  28 import java.util.*;
  29 
  30 import sun.jvm.hotspot.debugger.*;
  31 import sun.jvm.hotspot.gc_interface.*;
  32 import sun.jvm.hotspot.runtime.*;
  33 import sun.jvm.hotspot.types.*;
  34 import sun.jvm.hotspot.utilities.*;
  35 
  36 public class GenCollectedHeap extends SharedHeap {
  37   private static CIntegerField nGensField;
  38   private static AddressField youngGenField;
  39   private static AddressField oldGenField;
  40   private static AddressField genSpecsField;
  41 
  42   private static GenerationFactory genFactory;
  43 
  44   static {
  45     VM.registerVMInitializedObserver(new Observer() {
  46         public void update(Observable o, Object data) {
  47           initialize(VM.getVM().getTypeDataBase());
  48         }
  49       });
  50   }
  51 
  52   private static synchronized void initialize(TypeDataBase db) {
  53     Type type = db.lookupType("GenCollectedHeap");
  54 
  55     nGensField = type.getCIntegerField("_n_gens");
  56     youngGenField = type.getAddressField("_young_gen");
  57     oldGenField = type.getAddressField("_old_gen");
  58     genSpecsField = type.getAddressField("_gen_specs");
  59 
  60     genFactory = new GenerationFactory();
  61   }
  62 
  63   public GenCollectedHeap(Address addr) {
  64     super(addr);
  65   }
  66 
  67   public int nGens() {
  68     return (int) nGensField.getValue(addr);
  69   }
  70 
  71   public Generation getGen(int i) {
  72     if (Assert.ASSERTS_ENABLED) {
  73       Assert.that((i >= 0) && (i < nGens()), "Index " + i +
  74                   " out of range (should be between 0 and " + nGens() + ")");
  75     }
  76 
  77     if ((i < 0) || (i >= nGens())) {
  78       return null;
  79     }
  80 
  81     if (i == 0) {
  82       return genFactory.newObject(youngGenField.getAddress());
  83     } else {
  84       return genFactory.newObject(oldGenField.getAddress());
  85     }
  86   }
  87 
  88   public boolean isIn(Address a) {
  89     for (int i = 0; i < nGens(); i++) {
  90       Generation gen = getGen(i);
  91       if (gen.isIn(a)) {
  92         return true;
  93       }
  94     }
  95 
  96     return false;
  97   }
  98 
  99   public long capacity() {
 100     long capacity = 0;
 101     for (int i = 0; i < nGens(); i++) {
 102       capacity += getGen(i).capacity();
 103     }
 104     return capacity;
 105   }