RFC perf tools: Report event parsing errors

hi,
adding support to report error from event string parsing.

This patchset contains support for standard parsing errors and more logic to recognize tracepoint and 'pmu//' terms, like:

  $ perf record -e 'sched:krava' ls
  invalid or unsupported event: 'sched:krava'
                                 \___ unknown tracepoint

  $ ./perf record -e 'cpu/even=0x1/' ls
  invalid or unsupported event: 'cpu/even=0x1/'
                                     \___ unknown term

  $ perf record -e cycles,cache-mises ls
  invalid or unsupported event: '..es,cache-mises'
                                           \___ parser error

any feedback about the error string shape would be great ;-)

Changes are also reachable in here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/event_parse_error

thanks
jirka

---
Jiri Olsa (6):
perf tools: Add parse_events_error interface perf tools: Add flex support for parse_events_error perf tools: Change parse_events_add_pmu interface perf tools: Add location to pmu event terms perf tools: Add term support for parse_events_error perf tools: Add tracepoint support for parse_events_error

 tools/perf/builtin-stat.c               |   2 +-
 tools/perf/tests/code-reading.c         |   2 +-
 tools/perf/tests/evsel-roundtrip-name.c |   4 +--
 tools/perf/tests/hists_cumulate.c       |   2 +-
 tools/perf/tests/hists_filter.c         |   4 +--
 tools/perf/tests/hists_link.c           |   4 +--
 tools/perf/tests/hists_output.c         |   2 +-
 tools/perf/tests/keep-tracking.c        |   4 +--
 tools/perf/tests/parse-events.c         |   2 +-
 tools/perf/tests/perf-time-to-tsc.c     |   2 +-
 tools/perf/tests/pmu.c                  |   2 +-
 tools/perf/tests/switch-tracking.c      |   8 +++---
 tools/perf/util/parse-events.c          | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------
 tools/perf/util/parse-events.h          |  32 ++++++++++++++--------
 tools/perf/util/parse-events.l          |  37 ++++++++++++++++++++++---
 tools/perf/util/parse-events.y          |  35 ++++++++++++++----------
 tools/perf/util/pmu.c                   |  23 +++++++++++-----
 tools/perf/util/pmu.h                   |   6 +++--
 tools/perf/util/record.c                |   4 +--
 19 files changed, 230 insertions(+), 80 deletions(-)