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Separate perf script into own repo
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add_perf_tracepoints.sh

Adds the required tracepoints via perf-probe. WARNING: parameters are passed unchecked

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del_perf_tracepoints.sh

Cleans up the tracepoints created by add_perf_tracepoints

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record_perf_events.sh

Runs perf record with the list of probes defined. Requires LD_LIBRARY_PATH to be set to include the hammer library, if not installed as a system library.

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parser-name-instrumentation.py

Run with `perf script -s parser-name-instrumentation.py`

Currently, return probes don't always fire, which leads to bogus results (or an error if a stack happens to underflow). Sadly, this renders the code non-functional without further modifications. It's here to illustrate the approach of mapping function calls/returns to push/pop operations on a stack of parsers, and a stack of stack of parsers (for different invocations of h_packrat_parse())