src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZPageAllocator.java

*** 35,60 ****
  
  // Mirror class for ZPageAllocator
  
  public class ZPageAllocator extends VMObject {
  
!     private static AddressField physicalField;
      private static CIntegerField usedField;
  
      static {
          VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
      }
  
      static private synchronized void initialize(TypeDataBase db) {
          Type type = db.lookupType("ZPageAllocator");
  
!         physicalField = type.getAddressField("_physical");
          usedField = type.getCIntegerField("_used");
      }
  
      private ZPhysicalMemoryManager physical() {
!       Address physicalAddr = physicalField.getValue(addr);
        return (ZPhysicalMemoryManager)VMObjectFactory.newObject(ZPhysicalMemoryManager.class, physicalAddr);
      }
  
      public long maxCapacity() {
          return physical().maxCapacity();
--- 35,60 ----
  
  // Mirror class for ZPageAllocator
  
  public class ZPageAllocator extends VMObject {
  
!     private static long physicalFieldOffset;
      private static CIntegerField usedField;
  
      static {
          VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
      }
  
      static private synchronized void initialize(TypeDataBase db) {
          Type type = db.lookupType("ZPageAllocator");
  
!         physicalFieldOffset = type.getAddressField("_physical").getOffset();
          usedField = type.getCIntegerField("_used");
      }
  
      private ZPhysicalMemoryManager physical() {
!       Address physicalAddr = addr.addOffsetTo(physicalFieldOffset);
        return (ZPhysicalMemoryManager)VMObjectFactory.newObject(ZPhysicalMemoryManager.class, physicalAddr);
      }
  
      public long maxCapacity() {
          return physical().maxCapacity();