I'm thinking that jitlog.MARK_TRACE_OPT is the only marker I need to keep track of

as I'm dumping pycode  (overloading execute_frame as vmprof does). 

When I see a MARK_TRACE_OPT, I just walk backward to find the closest pycode dump.

This will give me the actual source code lines that was JITTED.

Would this approach work ?

Thanks,

SHubha