Re: [patch rfc] Lazy frame ID evaluation

[Andrew Cagney <ac131313 at redhat dot com>]

I've checked this in.

> Ref: Lazy get_frame_id()
> http://sources.redhat.com/ml/gdb/2003-03/msg00243.html
>
> The attached delays the computation of the frame ID until when it is needed.  Doing this (at least for targets using new frames) reduces the overhead of creating the initial frame - it avoids the need to do any prologue analysis until it is actually needed.
>
> The follow on change is to exploit this in infrun.c, by using get_frame_type (get_current_frame ()) instead of PC_IN_SIGTRAMP() and PC_IN_DUMMY_FRAME().  They'll follow as separate changes.

I won't think about following this one up until after the dummy code 
cleanup has settled.

> Andrew
>
>
>
> 2003-03-26  Andrew Cagney  <cagney at redhat dot com>
>
> 	* frame.c (get_frame_base): Force ID initialization.
> 	(get_prev_frame): Move computation of the frame ID from here ...
> 	(get_frame_id): ... to here.
> 	(legacy_get_prev_frame): Mark the frame ID as valid.
> 	* frame.h (struct frame_info): Add field "id_p".