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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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7
tools/lib/traceevent/event-parse.h
View file

@ -851,10 +851,13 @@ struct filter_type {
struct filter_arg *filter;
};
#define PEVENT_FILTER_ERROR_BUFSZ 1024
struct event_filter {
struct pevent *pevent;
int filters;
struct filter_type *event_filters;
char error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
};
struct event_filter *pevent_filter_alloc(struct pevent *pevent);
@ -874,10 +877,12 @@ enum filter_trivial_type {
enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
const char *filter_str);
enum pevent_errno pevent_filter_match(struct event_filter *filter,
struct pevent_record *record);
int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
char *buf, size_t buflen);
int pevent_event_filtered(struct event_filter *filter,
int event_id);