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
...
I changed api/fs tracefs/debugfs related code and I'm not completely
sure what were the long term intentions with this code, so please
comment ;-)
jirka
---
Jiri Olsa (11):
tools: Add err.h with ERR_PTR PTR_ERR interface
perf tools: Add tracing_path and remove unneeded functions
perf tools: Do not change lib/api/fs/debugfs directly
perf tools: Move debugfs__strerror_open into util.c object
perf tools: Move tracing_path stuff under same namespace
perf tools: Move tracing_path interface into trace-event-path.c
perf tools: Make tracing_path_strerror_open message generic
perf tools: Do not export debugfs_mountpoint and tracefs_mountpoint
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 | 28 +++++++++++++++++++
tools/lib/api/fs/debugfs.c | 53
+-----------------------------------
tools/lib/api/fs/debugfs.h | 5 ----
tools/lib/api/fs/tracefs.c | 2 +-
tools/lib/api/fs/tracefs.h | 2 --
tools/perf/builtin-trace.c | 4 +--
tools/perf/perf.c | 11 ++++----
tools/perf/tests/openat-syscall-all-cpus.c | 2 ++
tools/perf/tests/openat-syscall.c | 2 ++
tools/perf/util/Build | 1 +
tools/perf/util/evsel.c | 8 ++++--
tools/perf/util/parse-events.c | 58
++++++++++++++++++++++++++++++----------
tools/perf/util/parse-events.h | 3 ++-
tools/perf/util/parse-events.y | 16 ++++++-----
tools/perf/util/trace-event-path.c | 129
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/trace-event.c | 7 +++--
tools/perf/util/trace-event.h | 12 +++++++++
tools/perf/util/util.c | 119
---------------------------------------------------------------------------------
tools/perf/util/util.h | 8 ------
19 files changed, 250 insertions(+), 220 deletions(-)
create mode 100644 tools/include/linux/err.h
create mode 100644 tools/perf/util/trace-event-path.c
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