Add kretprobe support

[deliverable/lttng-modules.git] / ltt-events.h

diff --git a/ltt-events.h b/ltt-events.h
index 31a50ca5f34968d0705e22885d30d54289d0db51..6cc4ea3f6fed01bbcc9309dbfcdfbfb33400a21e 100644 (file)
--- a/ltt-events.h
+++ b/ltt-events.h
@@ -163,6 +163,8 @@ struct lttng_probe_desc {
        struct list_head head;                  /* chain registered probes */
 };
 
+struct lttng_krp;                              /* Kretprobe handling */
+
 /*
  * ltt_event structure is referred to by the tracing fast path. It must be
  * kept small.
@@ -180,6 +182,10 @@ struct ltt_event {
                        struct kprobe kp;
                        char *symbol_name;
                } kprobe;
+               struct {
+                       struct lttng_krp *lttng_krp;
+                       char *symbol_name;
+               } kretprobe;
                struct {
                        char *symbol_name;
                } ftrace;
@@ -351,6 +357,38 @@ void lttng_kprobes_destroy_private(struct ltt_event *event)
 }
 #endif
 
+#ifdef CONFIG_KRETPROBES
+int lttng_kretprobes_register(const char *name,
+               const char *symbol_name,
+               uint64_t offset,
+               uint64_t addr,
+               struct ltt_event *event_entry,
+               struct ltt_event *event_exit);
+void lttng_kretprobes_unregister(struct ltt_event *event);
+void lttng_kretprobes_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_kretprobes_register(const char *name,
+               const char *symbol_name,
+               uint64_t offset,
+               uint64_t addr,
+               struct ltt_event *event_entry,
+               struct ltt_event *event_exit)
+{
+       return -ENOSYS;
+}
+
+static inline
+void lttng_kretprobes_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_kretprobes_destroy_private(struct ltt_event *event)
+{
+}
+#endif
+
 #ifdef CONFIG_DYNAMIC_FTRACE
 int lttng_ftrace_register(const char *name,
                          const char *symbol_name,