Currently I think the JIT frame unwinder is given a fairly high priority: frame_unwind_prepend_unwinder (gdbarch, &jit_frame_unwind); In my case, I think the resulting sniffer will necessarily have to use a heuristic to decide if it is looking at a JIT frame. So, it would be nice to be able to specify that this unwinder should come after any sniffer that works off the debug info, as those are probably more reliable.