[pypy-dev] jitlog.MARK_TRACE_OPT in do_compile_bridge and do_compile_loop of compile.py

[Shubha Ramani via pypy-dev]

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
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