src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/Klass.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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.

@@ -59,20 +59,22 @@
       traceIDField  = type.getField("_trace_id");
     } catch(Exception e) {
     }
     subklass     = new MetadataField(type.getAddressField("_subklass"), 0);
     nextSibling  = new MetadataField(type.getAddressField("_next_sibling"), 0);
+    vtableLen    = new CIntField(type.getCIntegerField("_vtable_len"), 0);
 
     LH_INSTANCE_SLOW_PATH_BIT  = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue();
     LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue();
     LH_ELEMENT_TYPE_SHIFT      = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue();
     LH_HEADER_SIZE_SHIFT       = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue();
     LH_ARRAY_TAG_SHIFT         = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue();
     LH_ARRAY_TAG_TYPE_VALUE    = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue();
     LH_ARRAY_TAG_OBJ_VALUE     = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue();
   }
 
+
   public Klass(Address addr) {
     super(addr);
   }
 
   // jvmdi support - see also class_status in VM code

@@ -89,10 +91,11 @@
   private static AddressField  name;
   private static CIntField accessFlags;
   private static MetadataField  subklass;
   private static MetadataField  nextSibling;
   private static sun.jvm.hotspot.types.Field traceIDField;
+  private static CIntField vtableLen;
 
   private Address getValue(AddressField field) {
     return addr.getAddressAt(field.getOffset());
   }
 

@@ -109,10 +112,11 @@
   public long     getAccessFlags()      { return            accessFlags.getValue(this);  }
   // Convenience routine
   public AccessFlags getAccessFlagsObj(){ return new AccessFlags(getAccessFlags());      }
   public Klass    getSubklassKlass()    { return (Klass)    subklass.getValue(this);     }
   public Klass    getNextSiblingKlass() { return (Klass)    nextSibling.getValue(this);  }
+  public long     getVtableLen()        { return            vtableLen.getValue(this); }
 
   public long traceID() {
     if (traceIDField == null) return 0;
     return traceIDField.getJLong(addr);
   }

@@ -177,10 +181,11 @@
       visitor.doInt(layoutHelper, true);
       // visitor.doOop(name, true);
       visitor.doCInt(accessFlags, true);
     visitor.doMetadata(subklass, true);
     visitor.doMetadata(nextSibling, true);
+    visitor.doCInt(vtableLen, true);
     }
 
   public long getObjectSize() {
     throw new RuntimeException("should not reach here");
   }