Adds a set of flags to query the bench_runner for available probes:
- --list-probes - List estimated probes
- --list-suite-probes - List estimated probes for each bench suite
- --list-case-probes - List estimated probes for each bench case
What's fun though, is we don't actually know the bench probes at compile
time, since the BENCH_* macros take a C string. But we're already
preprocessing bench_*.toml with Python, so guessing what probes are
available is easy with a bit of regex:
BENCH_(?:STOP|F?RESULT)\( *"((?:\\.|[^"])*)"
This does make the --list*probes flags best effort, but I think unlikely
to break in practice.
Christopher Haster
81d681cab2