--- a/src/hotspot/share/runtime/vmStructs.cpp	Mon Sep 25 17:40:06 2017 +0200
+++ b/src/hotspot/share/runtime/vmStructs.cpp	Sat Sep 30 00:14:39 2017 +0000
@@ -2726,8 +2726,12 @@
   /* JVMCI */                                                             \
   /****************/                                                      \
                                                                           \
-  declare_preprocessor_constant("INCLUDE_JVMCI", INCLUDE_JVMCI)
-
+  declare_preprocessor_constant("INCLUDE_JVMCI", INCLUDE_JVMCI)           \
+                                                                          \
+  /****************/                                                      \
+  /*  VMRegImpl   */                                                      \
+  /****************/                                                      \
+  declare_constant(VMRegImpl::stack_slot_size)
 
 //--------------------------------------------------------------------------------
 // VM_LONG_CONSTANTS

--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/VMRegImpl.java	Mon Sep 25 17:40:06 2017 +0200
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/VMRegImpl.java	Sat Sep 30 00:14:39 2017 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
+ * 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
@@ -37,6 +37,7 @@
   private static int stack0Val;
   private static Address stack0Addr;
   private static AddressField regNameField;
+  private static int stackSlotSize;
 
   static {
     VM.registerVMInitializedObserver(new Observer() {
@@ -53,6 +54,7 @@
     stack0Val = (int) stack0Addr.hashCode();
     stack0 = new VMReg(stack0Val);
     regNameField = type.getAddressField("regName[0]");
+    stackSlotSize = db.lookupIntConstant("VMRegImpl::stack_slot_size");
   }
 
   public static VMReg getStack0() {
@@ -67,4 +69,8 @@
     long addrSize = VM.getVM().getAddressSize();
     return CStringUtilities.getString(regName.getAddressAt(index * addrSize));
   }
+
+  public static int getStackSlotSize() {
+    return stackSlotSize;
+  }
 }

--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/Frame.java	Mon Sep 25 17:40:06 2017 +0200
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/Frame.java	Sat Sep 30 00:14:39 2017 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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
@@ -430,7 +430,7 @@
       // If it is passed in a register, it got spilled in the stub frame.
       return regMap.getLocation(reg);
     } else {
-      long spOffset = VM.getVM().getAddressSize() * reg.minus(stack0);
+      long spOffset = reg.reg2Stack() * VM.getVM().getVMRegImplInfo().getStackSlotSize();
       return getUnextendedSP().addOffsetTo(spOffset);
     }
   }

--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VMReg.java	Mon Sep 25 17:40:06 2017 +0200
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VMReg.java	Sat Sep 30 00:14:39 2017 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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
@@ -84,4 +84,8 @@
   public boolean greaterThanOrEqual(VMReg arg)  { return value >= arg.value; }
 
   public int     minus(VMReg arg)               { return value - arg.value;  }
+
+  public int reg2Stack() {
+    return value - VM.getVM().getVMRegImplInfo().getStack0().getValue();
+  }
 }