Implement PID tracking for kernel tracing

[lttng-tools.git] / include / lttng / session.h

diff --git a/include/lttng/session.h b/include/lttng/session.h
index 2c9b842d4c693be23478c30d2e40c33e4d22d623..7b1c8da6aa10825f66ad06aaa9ee76a440542c08 100644 (file)
--- a/include/lttng/session.h
+++ b/include/lttng/session.h
@@ -104,6 +104,38 @@ extern int lttng_destroy_session(const char *name);
  */
 extern int lttng_list_sessions(struct lttng_session **sessions);
 
+/*
+ * Set the shared memory path for a session.
+ *
+ * Sets the (optional) file system path where shared memory buffers will
+ * be created for the session. This is useful for buffer extraction on
+ * crash, when used with filesystems like pramfs.
+ *
+ * Return 0 on success else a negative LTTng error code.
+ */
+extern int lttng_set_session_shm_path(const char *session_name,
+               const char *shm_path);
+
+/*
+ * Add PID to session tracker.
+ *
+ * A pid argument >= 0 adds the PID to the session tracker.
+ * A pid argument of -1 means "track all PIDs".
+ *
+ * Return 0 on success else a negative LTTng error code.
+ */
+extern int lttng_track_pid(struct lttng_handle *handle, int pid);
+
+/*
+ * Remove PID from session tracker.
+ *
+ * A pid argument >= 0 removes the PID from the session tracker.
+ * A pid argument of -1 means "untrack all PIDs".
+ *
+ * Return 0 on success else a negative LTTng error code.
+ */
+extern int lttng_untrack_pid(struct lttng_handle *handle, int pid);
+
 #ifdef __cplusplus
 }
 #endif