--- a/hotspot/src/cpu/x86/vm/frame_x86.cpp	Mon May 02 10:51:36 2011 -0700
+++ b/hotspot/src/cpu/x86/vm/frame_x86.cpp	Mon May 02 18:53:37 2011 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, 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
@@ -669,3 +669,23 @@
   int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
   return &interpreter_frame_tos_address()[index];
 }
+
+#ifdef ASSERT
+
+#define DESCRIBE_FP_OFFSET(name) \
+  values.describe(-1, fp() + frame::name##_offset, #name)
+
+void frame::describe_pd(FrameValues& values, int frame_no) {
+  if (is_interpreted_frame()) {
+    DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp);
+    DESCRIBE_FP_OFFSET(interpreter_frame_last_sp);
+    DESCRIBE_FP_OFFSET(interpreter_frame_method);
+    DESCRIBE_FP_OFFSET(interpreter_frame_mdx);
+    DESCRIBE_FP_OFFSET(interpreter_frame_cache);
+    DESCRIBE_FP_OFFSET(interpreter_frame_locals);
+    DESCRIBE_FP_OFFSET(interpreter_frame_bcx);
+    DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);
+  }
+
+}
+#endif