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

*** 1,7 ****
  /*
!  * Copyright (c) 2018, 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) 2018, 2019, 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.
*** 52,68 ****
  
      private Address map() {
          return mapField.getValue(addr);
      }
  
      private long index_for_addr(Address addr) {
          long index = ZAddress.offset(addr) >> AddressRangeShift;
  
          return index;
      }
  
      Address get(Address addr) {
          long index = index_for_addr(addr);
  
!         return map().getAddressAt(index * VM.getVM().getBytesPerLong());
      }
  }
--- 52,91 ----
  
      private Address map() {
          return mapField.getValue(addr);
      }
  
+     public long size() {
+         return ZGlobals.ZAddressOffsetMax >> AddressRangeShift;
+     }
+ 
      private long index_for_addr(Address addr) {
          long index = ZAddress.offset(addr) >> AddressRangeShift;
  
          return index;
      }
  
+     Address at(long index) {
+         return map().getAddressAt(index * VM.getVM().getBytesPerLong());
+     }
+ 
      Address get(Address addr) {
          long index = index_for_addr(addr);
+         return at(index);
+     }
  
!     public class Iterator {
!         private long next = 0;
! 
!         boolean hasNext() {
!             return next < size();
!         }
! 
!         Address next() {
!             if (next >= size()) {
!                 throw new RuntimeException("OOIBE");
!             }
! 
!             return at(next++);
!         }
      }
  }