perf evlist: Adopt __set_tracepoint_handlers method from perf_session

It all operates on the evsels in the session's evlist, so move it to the
evlist layer to make it useful to tools not using perf_session, just
evlists, like 'perf trace' in live mode.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-9oc53gnfi53vg82fvolkm85g@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/evlist.c

@@ -186,6 +186,30 @@ void perf_evlist__splice_list_tail(struct evlist *evlist,
 	}
 }
 
+int __evlist__set_tracepoints_handlers(struct evlist *evlist,
+				       const struct evsel_str_handler *assocs, size_t nr_assocs)
+{
+	struct evsel *evsel;
+	size_t i;
+	int err;
+
+	for (i = 0; i < nr_assocs; i++) {
+		// Adding a handler for an event not in this evlist, just ignore it.
+		evsel = perf_evlist__find_tracepoint_by_name(evlist, assocs[i].name);
+		if (evsel == NULL)
+			continue;
+
+		err = -EEXIST;
+		if (evsel->handler != NULL)
+			goto out;
+		evsel->handler = assocs[i].handler;
+	}
+
+	err = 0;
+out:
+	return err;
+}
+
 void __perf_evlist__set_leader(struct list_head *list)
 {
 	struct evsel *evsel, *leader;

tools/perf/util/evlist.h

@@ -118,6 +118,13 @@ void perf_evlist__stop_sb_thread(struct evlist *evlist);
 int perf_evlist__add_newtp(struct evlist *evlist,
 			   const char *sys, const char *name, void *handler);
 
+int __evlist__set_tracepoints_handlers(struct evlist *evlist,
+				       const struct evsel_str_handler *assocs,
+				       size_t nr_assocs);
+
+#define evlist__set_tracepoints_handlers(evlist, array) \
+	__evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array))
+
 void __perf_evlist__set_sample_bit(struct evlist *evlist,
 				   enum perf_event_sample_format bit);
 void __perf_evlist__reset_sample_bit(struct evlist *evlist,

tools/perf/util/session.c

@@ -2355,35 +2355,6 @@ void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
 	fprintf(fp, "# ========\n#\n");
 }
 
-
-int __perf_session__set_tracepoints_handlers(struct perf_session *session,
-					     const struct evsel_str_handler *assocs,
-					     size_t nr_assocs)
-{
-	struct evsel *evsel;
-	size_t i;
-	int err;
-
-	for (i = 0; i < nr_assocs; i++) {
-		/*
-		 * Adding a handler for an event not in the session,
-		 * just ignore it.
-		 */
-		evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
-		if (evsel == NULL)
-			continue;
-
-		err = -EEXIST;
-		if (evsel->handler != NULL)
-			goto out;
-		evsel->handler = assocs[i].handler;
-	}
-
-	err = 0;
-out:
-	return err;
-}
-
 int perf_event__process_id_index(struct perf_session *session,
 				 union perf_event *event)
 {

tools/perf/util/session.h

@@ -120,12 +120,8 @@ void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
 
 struct evsel_str_handler;
 
-int __perf_session__set_tracepoints_handlers(struct perf_session *session,
-					     const struct evsel_str_handler *assocs,
-					     size_t nr_assocs);
-
 #define perf_session__set_tracepoints_handlers(session, array) \
-	__perf_session__set_tracepoints_handlers(session, array, ARRAY_SIZE(array))
+	__evlist__set_tracepoints_handlers(session->evlist, array, ARRAY_SIZE(array))
 
 extern volatile int session_done;