src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/VMRegImpl.java

*** 1,7 ****
  /*
!  * Copyright (c) 2006, 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) 2006, 2017, 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.
*** 35,44 ****
--- 35,45 ----
  
    private static VMReg stack0;
    private static int stack0Val;
    private static Address stack0Addr;
    private static AddressField regNameField;
+   private static int stackSlotSize;
  
    static {
      VM.registerVMInitializedObserver(new Observer() {
          public void update(Observable o, Object data) {
            initialize(VM.getVM().getTypeDataBase());
*** 51,60 ****
--- 52,62 ----
      AddressField stack0Field = type.getAddressField("stack0");
      stack0Addr = stack0Field.getValue();
      stack0Val = (int) stack0Addr.hashCode();
      stack0 = new VMReg(stack0Val);
      regNameField = type.getAddressField("regName[0]");
+     stackSlotSize = db.lookupIntConstant("VMRegImpl::stack_slot_size");
    }
  
    public static VMReg getStack0() {
      return stack0;
    }
*** 65,70 ****
--- 67,76 ----
      }
      Address regName = regNameField.getStaticFieldAddress();
      long addrSize = VM.getVM().getAddressSize();
      return CStringUtilities.getString(regName.getAddressAt(index * addrSize));
    }
+ 
+   public static int getStackSlotSize() {
+     return stackSlotSize;
+   }
  }