src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/HeapRegion.java

*** 1,7 ****
  /*
!  * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 27,74 ****
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Observable;
  import java.util.Observer;
  import sun.jvm.hotspot.debugger.Address;
  import sun.jvm.hotspot.gc.shared.CompactibleSpace;
  import sun.jvm.hotspot.memory.MemRegion;
  import sun.jvm.hotspot.runtime.VM;
  import sun.jvm.hotspot.types.AddressField;
  import sun.jvm.hotspot.types.CIntegerField;
  import sun.jvm.hotspot.types.Type;
  import sun.jvm.hotspot.types.TypeDataBase;
  
  // Mirror class for HeapRegion. Currently we don't actually include
  // any of its fields but only iterate over it.
  
  public class HeapRegion extends CompactibleSpace {
      // static int GrainBytes;
      static private CIntegerField grainBytesField;
      static private AddressField topField;
  
      static {
          VM.registerVMInitializedObserver(new Observer() {
                  public void update(Observable o, Object data) {
                      initialize(VM.getVM().getTypeDataBase());
                  }
              });
      }
  
      static private synchronized void initialize(TypeDataBase db) {
!         Type type = db.lookupType("HeapRegion");
  
!         grainBytesField = type.getCIntegerField("GrainBytes");
!         topField = type.getAddressField("_top");
  
      }
  
      static public long grainBytes() {
          return grainBytesField.getValue();
      }
  
      public HeapRegion(Address addr) {
          super(addr);
      }
  
      public Address top() {
          return topField.getValue(addr);
      }
--- 27,91 ----
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Observable;
  import java.util.Observer;
  import sun.jvm.hotspot.debugger.Address;
+ import sun.jvm.hotspot.debugger.OopHandle;
  import sun.jvm.hotspot.gc.shared.CompactibleSpace;
  import sun.jvm.hotspot.memory.MemRegion;
  import sun.jvm.hotspot.runtime.VM;
+ import sun.jvm.hotspot.runtime.VMObjectFactory;
  import sun.jvm.hotspot.types.AddressField;
  import sun.jvm.hotspot.types.CIntegerField;
  import sun.jvm.hotspot.types.Type;
  import sun.jvm.hotspot.types.TypeDataBase;
+ import sun.jvm.hotspot.utilities.Assert;
  
  // Mirror class for HeapRegion. Currently we don't actually include
  // any of its fields but only iterate over it.
  
  public class HeapRegion extends CompactibleSpace {
      // static int GrainBytes;
      static private CIntegerField grainBytesField;
      static private AddressField topField;
+     private static long typeFieldOffset;
+     private static long pointerSize;
+ 
+     private HeapRegionType type;
  
      static {
          VM.registerVMInitializedObserver(new Observer() {
                  public void update(Observable o, Object data) {
                      initialize(VM.getVM().getTypeDataBase());
                  }
              });
      }
  
      static private synchronized void initialize(TypeDataBase db) {
!         Type t = db.lookupType("HeapRegion");
  
!         grainBytesField = t.getCIntegerField("GrainBytes");
!         topField = t.getAddressField("_top");
!         typeFieldOffset = t.getField("_type").getOffset();
  
+         pointerSize = db.lookupType("HeapRegion*").getSize();
      }
  
      static public long grainBytes() {
          return grainBytesField.getValue();
      }
  
      public HeapRegion(Address addr) {
          super(addr);
+ 
+         if (Assert.ASSERTS_ENABLED) {
+             Assert.that(addr instanceof OopHandle, "addr should be OopHandle");
+         }
+ 
+         Address typeAddr = addr.addOffsetToAsOopHandle(typeFieldOffset);
+         type = (HeapRegionType)VMObjectFactory.newObject(
+                                                 HeapRegionType.class, typeAddr);
      }
  
      public Address top() {
          return topField.getValue(addr);
      }
*** 87,92 ****
--- 104,133 ----
  
      @Override
      public long free() {
          return end().minus(top());
      }
+ 
+     public boolean isFree() {
+         return type.isFree();
+     }
+ 
+     public boolean isYoung() {
+         return type.isYoung();
+     }
+ 
+     public boolean isHumongous() {
+         return type.isHumongous();
+     }
+ 
+     public boolean isPinned() {
+         return type.isPinned();
+     }
+ 
+     public boolean isOld() {
+         return type.isOld();
+     }
+ 
+     public static long getPointerSize() {
+         return pointerSize;
+     }
  }