Re: crasher in dwarf2loc.c

[Daniel Jacobowitz <drow@mvista.com>]

On Tue, Apr 22, 2003 at 05:50:56PM -0700, Michael Snyder wrote:
> Hey Daniel, 
> 
> I've got a core dump coming from dwarf_expr_frame_base.
> First you call get_frame_function, and then you immediately
> use its return value.  But get_frame_function can return zero, 
> so I think you need to check for zero before using it.
> 
> Michael

Just to avoid the crash, you're probably right.

> PS: more details:  get_frame_block returns zero, because
> frame_address_in_block returns a pc that is not in any block.
> 
> The crash occurs while running recurse.exp, when we have a
> watchpoint on a local variable in an inner frame, and we 
> continue -- so I don't know the exact context; but I'm 
> willing to bet that it is trying to evaluate the local
> variable after the stack frame has been destroyed.

Huh - we should not even be reaching this code.  I don't quite
understand your explanation; what target does this happen?  Can it be
reproduced on a simulator, or something of that ilk?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer