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tools lib traceevent: Introduce pevent_filter_strerror()

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The pevent_filter_strerror() function is for receiving actual error
message from pevent_errno value.  To do that, add a static buffer to
event_filter for saving internal error message

If a failed function saved other information in the static buffer
returns the information, otherwise returns generic error message.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386833777-3790-15-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2013-12-12 16:36:17 +09:00 • committed by Arnaldo Carvalho de Melo
parent f1cbf78d17
commit bf19b82e7c
3 changed files with 61 additions and 61 deletions
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17
tools/lib/traceevent/event-parse.c
View file

@ -5230,22 +5230,7 @@ int pevent_strerror(struct pevent *pevent __maybe_unused,
idx = errnum - __PEVENT_ERRNO__START - 1;
msg = pevent_error_str[idx];
switch (errnum) {
case PEVENT_ERRNO__MEM_ALLOC_FAILED:
case PEVENT_ERRNO__PARSE_EVENT_FAILED:
case PEVENT_ERRNO__READ_ID_FAILED:
case PEVENT_ERRNO__READ_FORMAT_FAILED:
case PEVENT_ERRNO__READ_PRINT_FAILED:
case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED:
case PEVENT_ERRNO__INVALID_ARG_TYPE:
snprintf(buf, buflen, "%s", msg);
break;
default:
/* cannot reach here */
break;
}
snprintf(buf, buflen, "%s", msg);
return 0;
}