linux-kernel - [PATCHv2 0/5] perf tools: Enhance parsing events tracepoint error output

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Date:	Mon,  7 Sep 2015 10:38:02 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Raphaël Beamonte <raphael.beamonte@...il.com>
Subject: [PATCHv2 0/5] perf tools: Enhance parsing events tracepoint error output

hi,
enhancing parsing events tracepoint error output. Adding
more verbose output when the tracepoint is not found or
the tracing event path cannot be access.

  $ sudo perf record -e sched:sched_krava ls
  event syntax error: 'sched:sched_krava'
                       \___ unknown tracepoint

  Error:  File /sys/kernel/debug/tracing//tracing/events/sched/sched_krava not found.
  Hint:   Perhaps this kernel misses some CONFIG_ setting to enable this feature?.

  Run 'perf list' for a list of valid events
  ...

  $ perf record -e sched:sched_krava ls
  event syntax error: 'sched:sched_krava'
                       \___ can't access trace events

  Error:  No permissions to read /sys/kernel/debug/tracing//tracing/events/sched/sched_krava
  Hint:   Try 'sudo mount -o remount,mode=755 /sys/kernel/debug'

  Run 'perf list' for a list of valid events
  ...

v2 changes:
  - debugfs/tracefs changes went already in through separate patchset
  - more commentary on err.h interface
  - fixed callers of err.h enhanced functions
  - added extra tags/cscope fix

Also available in:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/tp


thanks,
jirka


---
Jiri Olsa (5):
      tools: Add err.h with ERR_PTR PTR_ERR interface
      perf tools: Add tools/include into tags directories
      perf tools: Propagate error info for the tracepoint parsing
      perf tools: Propagate error info from tp_format
      perf tools: Enhance parsing events tracepoint error output

 tools/include/linux/err.h                   | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 tools/perf/Makefile.perf                    |  2 +-
 tools/perf/builtin-trace.c                  | 19 +++++++++++--------
 tools/perf/tests/evsel-tp-sched.c           | 10 ++++++++--
 tools/perf/tests/openat-syscall-all-cpus.c  |  3 ++-
 tools/perf/tests/openat-syscall-tp-fields.c |  3 ++-
 tools/perf/tests/openat-syscall.c           |  3 ++-
 tools/perf/util/evlist.c                    |  3 ++-
 tools/perf/util/evsel.c                     | 11 +++++++++--
 tools/perf/util/evsel.h                     |  3 +++
 tools/perf/util/parse-events.c              | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++----------------
 tools/perf/util/parse-events.h              |  3 ++-
 tools/perf/util/parse-events.y              | 16 +++++++++-------
 tools/perf/util/trace-event.c               | 13 +++++++++++--
 14 files changed, 161 insertions(+), 43 deletions(-)
 create mode 100644 tools/include/linux/err.h
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