sysdep/i386/backtrace.h infinite loop?

[Marco Trudel]

Andrew Haley wrote:
> Marco Trudel writes:
>  > Maybe a stupid question, but how can this loop in 
>  > sysdep/i386/backtrace.h ever end:
>  > 
>  > register _Jv_uintptr_t *_ebp __asm__ ("ebp");
>  > _Jv_uintptr_t rfp;
>  > for (rfp = *_ebp; rfp; rfp = *(_Jv_uintptr_t *)rfp)
>  > {
>  >    // only read access for rfp
>  > }
>  > 
>  > Maybe because "*(_Jv_uintptr_t *)rfp" is changing it, but I can't see how...
> 
> It looks to me like it's walking down a linked list until it hits NULL.

Yeah, but where happens the down-walking? In my opinion we do 
always-the-same-value-walking...

Marco