[PATCH v4 0/3] perf probe: Allow names to start with digits

[Dominique Martinet <asmadeus@codewreck.org>]

This is a rebase of the patch orginally sent almost two years ago here:
https://lkml.kernel.org/r/20220612061508.1449636-1-asmadeus@codewreck.org

At the time I was asked to add tests, and Jiri whipped up something to
make the test pass even for probes that don't exist on most systems but
that ended up never being formatted or sent... I asked what happened of
it and got asked to send it myself, but obviously also totally forget
about it myself until I needed it again now.

I've taken the diff from that thread, adapted it a little bit to the
current master branch and checked things still fall in place -- I didn't
see any obvious problem.

Thanks!

To: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
To: Mark Rutland <mark.rutland@arm.com>
To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Ian Rogers <irogers@google.com>
To: Adrian Hunter <adrian.hunter@intel.com>
To: Liang, Kan <kan.liang@linux.intel.com>
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>

Changes in v4:
- add missing ifdef LIBTRACEEVENT for new test case
Note build-test still failed on my setup due to some bpf/cgroup problem,
which is more likely a setup problem but means I couldn't verify build
all the way:
util/bpf_skel/bperf_cgroup.bpf.c:71:10: error: incomplete definition of type 'struct cgroup'
- Link to v3: https://lore.kernel.org/r/20240509-perf_digit-v3-0-9036bf7898da@codewreck.org

Changes in v3:
- fix evsel__newtp_idx typo in commit 1's message
- rebase onto perf-tools-next
- add trailers
- Link to v2: https://lore.kernel.org/r/20240505-perf_digit-v2-0-6ece307fdaad@codewreck.org

Changes in v2:
- update Jiri's email in commit tags
- (not a change, but after being brain-dead and Ian helpful
reply I'm confirming patch 3/3 works as expected)
- Link to v1: https://lore.kernel.org/r/20240407-perf_digit-v1-0-57ec37c63394@codewreck.org

---
Dominique Martinet (3):
      perf parse-events: pass parse_state to add_tracepoint
      perf parse-events: Add new 'fake_tp' parameter for tests
      perf parse: Allow names to start with digits

 tools/perf/tests/parse-events.c | 13 +++++++++++--
 tools/perf/tests/pmu-events.c   |  2 +-
 tools/perf/util/evlist.c        |  3 ++-
 tools/perf/util/evsel.c         | 20 +++++++++++++-------
 tools/perf/util/evsel.h         |  4 ++--
 tools/perf/util/metricgroup.c   |  3 ++-
 tools/perf/util/parse-events.c  | 38 +++++++++++++++++++++++---------------
 tools/perf/util/parse-events.h  |  9 ++++++---
 tools/perf/util/parse-events.l  |  4 ++--
 tools/perf/util/parse-events.y  |  2 +-
 10 files changed, 63 insertions(+), 35 deletions(-)
---
base-commit: 187c219b57eaf3e1b7a3cab2c6a8b7909bdbf4a9
change-id: 20240407-perf_digit-72445b5edb62

Best regards,
-- 
Dominique Martinet | Asmadeus