perf evsel: Delete the event selectors at exit

Freeing all the possibly allocated resources, reducing complexity
on each tool exit path.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -965,8 +965,6 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 out_free_event_array:
 	free(event_array);
 out_free_fd:
-	list_for_each_entry(pos, &evsel_list, node)
-		perf_evsel__free_fd(pos);
 	free(all_tids);
 	all_tids = NULL;
 out_symbol_exit:

tools/perf/builtin-stat.c

@@ -844,10 +844,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 	if (status != -1)
 		print_stat(argc, argv);
 out_free_fd:
-	list_for_each_entry(pos, &evsel_list, node) {
+	list_for_each_entry(pos, &evsel_list, node)
-		perf_evsel__free_fd(pos);
 		perf_evsel__free_stat_priv(pos);
-	}
 out:
 	return status;
 }

tools/perf/builtin-top.c

@@ -1495,10 +1495,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
 
 	status = __cmd_top();
 out_free_fd:
-	list_for_each_entry(pos, &evsel_list, node) {
+	list_for_each_entry(pos, &evsel_list, node)
-		perf_evsel__free_fd(pos);
 		perf_evsel__free_mmap(pos);
-	}
 
 	return status;
 }

tools/perf/perf.c

@@ -286,6 +286,8 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 	status = p->fn(argc, argv, prefix);
 	exit_browser(status);
 
+	perf_evsel_list__delete();
+
 	if (status)
 		return status & 0xff;
 

tools/perf/util/parse-events.c

@@ -982,3 +982,14 @@ int perf_evsel_list__create_default(void)
 	++nr_counters;
 	return 0;
 }
+
+void perf_evsel_list__delete(void)
+{
+	struct perf_evsel *pos, *n;
+
+	list_for_each_entry_safe(pos, n, &evsel_list, node) {
+		list_del_init(&pos->node);
+		perf_evsel__delete(pos);
+	}
+	nr_counters = 0;
+}

tools/perf/util/parse-events.h

@@ -12,6 +12,7 @@ struct perf_evsel;
 extern struct list_head evsel_list;
 
 int perf_evsel_list__create_default(void);
+void perf_evsel_list__delete(void);
 
 struct option;