linux/tools/perf/util/trace-event.c
Namhyung Kim 8d0c2224ca tools lib traceevent: Make plugin unload function receive pevent
The PEVENT_PLUGIN_UNLOADER function might need some cleanup using pevent
like unregister some handlers.  So pass pevent as argument.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1389750340-15965-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-01-15 15:10:40 -03:00

83 lines
1.7 KiB
C

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/kernel.h>
#include <traceevent/event-parse.h>
#include "trace-event.h"
#include "util.h"
/*
* global trace_event object used by trace_event__tp_format
*
* TODO There's no cleanup call for this. Add some sort of
* __exit function support and call trace_event__cleanup
* there.
*/
static struct trace_event tevent;
int trace_event__init(struct trace_event *t)
{
struct pevent *pevent = pevent_alloc();
if (pevent) {
t->plugin_list = traceevent_load_plugins(pevent);
t->pevent = pevent;
}
return pevent ? 0 : -1;
}
void trace_event__cleanup(struct trace_event *t)
{
traceevent_unload_plugins(t->plugin_list, t->pevent);
pevent_free(t->pevent);
}
static struct event_format*
tp_format(const char *sys, const char *name)
{
struct pevent *pevent = tevent.pevent;
struct event_format *event = NULL;
char path[PATH_MAX];
size_t size;
char *data;
scnprintf(path, PATH_MAX, "%s/%s/%s/format",
tracing_events_path, sys, name);
if (filename__read_str(path, &data, &size))
return NULL;
pevent_parse_format(pevent, &event, data, size, sys);
free(data);
return event;
}
struct event_format*
trace_event__tp_format(const char *sys, const char *name)
{
static bool initialized;
if (!initialized) {
int be = traceevent_host_bigendian();
struct pevent *pevent;
if (trace_event__init(&tevent))
return NULL;
pevent = tevent.pevent;
pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
pevent_set_file_bigendian(pevent, be);
pevent_set_host_bigendian(pevent, be);
initialized = true;
}
return tp_format(sys, name);
}