Why do we have two ways of finding sniffers?

[Jim Blandy]

Jim Blandy <jimb@redhat.com> writes:
> I don't understand why we need both alternatives.  Shouldn't it be
> sufficient to simply have each entry in the list point to a function
> that expects the next frame's frame_info and a prologue cache, and
> returns a 'struct frame_unwind *' or zero?

I guess we'd also need a void * passed through to the function, to
support things like tramp_frame_prepend_unwinder.