Re: Further cache generating if PC is 0?

[Jason Molenda <jmolenda@apple.com>]

Hi Corinna,


On Jun 23, 2005, at 10:06 AM, Corinna Vinschen wrote:

> Ok, so we unwind the stack pointer and what happens at that point is a
> pretty hopeless guess.  The guess is that the function is frameless  
> and
> has either no local variables or we're still in the prologue.

No, if we follow the convention of setting up a frame pointer and  
saving it on function entry (i.e. we're not debugging -fomit-frame- 
pointer code in gcc's terminology), we can do better.  If the  
function we're examining is potentially frameless, then we're reduced  
to guessing.  But if the function we're examining MUST have set up a  
frame, we should assume it did so and continue up the stack.

cf http://sources.redhat.com/ml/gdb-patches/2005-06/msg00060.html


Jason