src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/CompactHashTable.java

*** 1,7 ****
  /*
!  * Copyright (c) 2015, 2016, 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) 2015, 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.
*** 117,122 ****
--- 117,157 ----
          entry = entry.addOffsetTo(2 * uintSize);
        }
      }
      return null;
    }
+ 
+   public interface SymbolVisitor {
+     public void visit(Symbol sym);
+   }
+ 
+   public void symbolsDo(SymbolVisitor visitor) {
+     long    symOffset;
+     Symbol  sym;
+     Address baseAddress = baseAddressField.getValue(addr);
+     Address bucket = bucketsField.getValue(addr);
+     for (long index = 0; index < bucketCount(); index++) {
+       int bucketInfo = (int)bucket.getCIntegerAt(index * uintSize, uintSize, true);
+       int bucketOffset = bucketOffset(bucketInfo);
+       int nextBucketInfo = (int)bucket.getCIntegerAt((index+1) * uintSize, uintSize, true);
+       int nextBucketOffset = bucketOffset(nextBucketInfo);
+ 
+       Address entry = entriesField.getValue(addr).addOffsetTo(bucketOffset * uintSize);
+ 
+       if (isValueOnlyBucket(bucketInfo)) {
+         symOffset = entry.getCIntegerAt(0, uintSize, true);
+         sym = Symbol.create(baseAddress.addOffsetTo(symOffset));
+         visitor.visit(sym);
+       } else {
+         Address entryMax = entriesField.getValue(addr).addOffsetTo(nextBucketOffset * uintSize);
+         while (entry.lessThan(entryMax)) {
+           symOffset = entry.getCIntegerAt(uintSize, uintSize, true);
+           Address symAddr = baseAddress.addOffsetTo(symOffset);
+           sym = Symbol.create(symAddr);
+           visitor.visit(sym);
+           entry = entry.addOffsetTo(2 * uintSize);
+         }
+       }
+     }
+   }
  }
+