tools lib traceevent: Add destructor for format_field

Move the calls that frees the resources allocated for a struct format_field to
a separate routine.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1426790181-19118-1-git-send-email-dsahern@gmail.com
[ Split this part from a larger patch, added pevent_ prefix as requested by Steven ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 9 insertions, 3 deletions

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index afe20ed9fac8..d7c37a7d9255 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -6228,15 +6228,20 @@ void pevent_ref(struct pevent *pevent)
         pevent->ref_count++;
 }
 
+void pevent_free_format_field(struct format_field *field)
+{
+        free(field->type);
+        free(field->name);
+        free(field);
+}
+
 static void free_format_fields(struct format_field *field)
 {
         struct format_field *next;
 
         while (field) {
                 next = field->next;
-                free(field->type);
-                free(field->name);
-                free(field);
+                pevent_free_format_field(field);
                 field = next;
         }
 }
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 5b4efc062320..6abda54d76f2 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -619,6 +619,7 @@ enum pevent_errno pevent_parse_format(struct pevent *pevent,
                                       const char *buf,
                                       unsigned long size, const char *sys);
 void pevent_free_format(struct event_format *event);
+void pevent_free_format_field(struct format_field *field);
 
 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
                            const char *name, struct pevent_record *record,