tools lib traceevent: Introduce pevent_filter_strerror()
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>
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 3ad784f..cf5db90 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -851,10 +851,13 @@
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 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);