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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