6 import sun.jvm.hotspot.utilities.BitMap;
   7 import sun.jvm.hotspot.utilities.BitMapInterface;
   8 
   9 /** Discontiguous bitmap for ZGC. */
  10 public class ZExternalBitMap implements BitMapInterface {
  11     private ZPageTable pageTable;
  12     private final long oopSize;
  13 
  14     private HashMap<ZPage, BitMap> pageToBitMap = new HashMap<ZPage, BitMap>();
  15 
  16     public ZExternalBitMap(ZCollectedHeap collectedHeap) {
  17         pageTable = collectedHeap.heap().pageTable();
  18         oopSize = VM.getVM().getOopSize();
  19     }
  20 
  21     private ZPage getPage(long zOffset) {
  22         if (zOffset > ZGlobals.ZAddressOffsetMask) {
  23             throw new RuntimeException("Not a Z offset: " + zOffset);
  24         }
  25 
  26         ZPage page = pageTable.get(ZOop.to_address(zOffset));
  27         if (page == null) {
  28             throw new RuntimeException("Address not in pageTable: " + zOffset);
  29         }
  30         return page;
  31     }
  32 
  33     private BitMap getOrAddBitMap(ZPage page) {
  34         BitMap bitMap = pageToBitMap.get(page);
  35         if (bitMap == null) {
  36             long size = page.size();
  37 
  38             long maxNumObjects = size >>> page.object_alignment_shift();
  39             if (maxNumObjects > Integer.MAX_VALUE) {
  40                 throw new RuntimeException("int overflow");
  41             }
  42             int intMaxNumObjects = (int)maxNumObjects;
  43 
  44             bitMap = new BitMap(intMaxNumObjects);
  45             pageToBitMap.put(page,  bitMap);
  46         }

   6 import sun.jvm.hotspot.utilities.BitMap;
   7 import sun.jvm.hotspot.utilities.BitMapInterface;
   8 
   9 /** Discontiguous bitmap for ZGC. */
  10 public class ZExternalBitMap implements BitMapInterface {
  11     private ZPageTable pageTable;
  12     private final long oopSize;
  13 
  14     private HashMap<ZPage, BitMap> pageToBitMap = new HashMap<ZPage, BitMap>();
  15 
  16     public ZExternalBitMap(ZCollectedHeap collectedHeap) {
  17         pageTable = collectedHeap.heap().pageTable();
  18         oopSize = VM.getVM().getOopSize();
  19     }
  20 
  21     private ZPage getPage(long zOffset) {
  22         if (zOffset > ZGlobals.ZAddressOffsetMask) {
  23             throw new RuntimeException("Not a Z offset: " + zOffset);
  24         }
  25 
  26         ZPage page = pageTable.get(ZUtils.longToAddress(zOffset));
  27         if (page == null) {
  28             throw new RuntimeException("Address not in pageTable: " + zOffset);
  29         }
  30         return page;
  31     }
  32 
  33     private BitMap getOrAddBitMap(ZPage page) {
  34         BitMap bitMap = pageToBitMap.get(page);
  35         if (bitMap == null) {
  36             long size = page.size();
  37 
  38             long maxNumObjects = size >>> page.object_alignment_shift();
  39             if (maxNumObjects > Integer.MAX_VALUE) {
  40                 throw new RuntimeException("int overflow");
  41             }
  42             int intMaxNumObjects = (int)maxNumObjects;
  43 
  44             bitMap = new BitMap(intMaxNumObjects);
  45             pageToBitMap.put(page,  bitMap);
  46         }