What's the difference between interpreted frame and entry frame

[Tom Rodriguez]

More specifically the entry frame performs the transition from C++  
code to generated code, so every sequence of interpreted or compiled  
frames always begins with an entry frame.  It's built by the call_stub  
and sets up all the invariants required by generated code.

tom

On Mar 12, 2009, at 4:04 AM, Gary Benson wrote:

> Colin(Du Li) wrote:
>> In hotspot, I usually see the terms "interpreted frame" and "entry
>> frame".  What's the difference between them?
>
> Each interpreted method has a frame on the stack; these frames are
> interpreted frames.  On entry, interpreted methods expect to find
> their arguments at the end of their caller's frame.  For the very
> first call there won't be an interpreted frame preceding, so for
> the first call a thing called the call stub creates a special frame
> with the arguments at the end; this is the entry frame.
>
> Cheers,
> Gary
>
> --
> http://gbenson.net/