extern "C" {
#endif
+#include <lttng/constant.h>
+
+enum lttng_tracker_type {
+ LTTNG_TRACKER_PID = 0,
+ LTTNG_TRACKER_VPID,
+ LTTNG_TRACKER_UID,
+ LTTNG_TRACKER_GID,
+ LTTNG_TRACKER_VUID,
+ LTTNG_TRACKER_VGID,
+};
+
+enum lttng_tracker_id_type {
+ LTTNG_ID_UNKNOWN = -1,
+
+ LTTNG_ID_ALL,
+ LTTNG_ID_VALUE,
+ LTTNG_ID_STRING,
+};
+
+struct lttng_tracker_id {
+ enum lttng_tracker_id_type type;
+ int value;
+ char *string;
+};
+
+struct lttng_handle;
+
/*
* Basic session information.
*
*/
#define LTTNG_SESSION_PADDING1 12
struct lttng_session {
- char name[NAME_MAX];
+ char name[LTTNG_NAME_MAX];
/* The path where traces are written */
char path[PATH_MAX];
uint32_t enabled; /* enabled/started: 1, disabled/stopped: 0 */
* The session will not be usable, tracing will be stopped thus buffers will be
* flushed.
*
+ * This call will wait for data availability for each domain of the session,
+ * which can take an arbitrary amount of time. However, when returning the
+ * tracing data is guaranteed to be ready to be read and analyzed.
+ *
+ * lttng_destroy_session_no_wait() may be used if such a guarantee is not
+ * needed.
+ *
* The name can't be NULL here.
*
* Return 0 on success else a negative LTTng error code.
*/
extern int lttng_destroy_session(const char *name);
+/*
+ * Behaves exactly like lttng_destroy_session but does not wait for data
+ * availability.
+ */
+extern int lttng_destroy_session_no_wait(const char *name);
+
/*
* List all the tracing sessions.
*
extern int lttng_set_session_shm_path(const char *session_name,
const char *shm_path);
+/*
+ * Add ID to session tracker.
+ *
+ * tracker_type is the type of tracker.
+ * An id argument >= 0 adds the ID to the session tracker.
+ * An id argument of -1 means "track all IDs".
+ *
+ * Return 0 on success else a negative LTTng error code.
+ */
+extern int lttng_track_id(struct lttng_handle *handle,
+ enum lttng_tracker_type tracker_type,
+ struct lttng_tracker_id *id);
+
+/*
+ * Remove ID from session tracker.
+ *
+ * tracker_type is the type of tracker.
+ * An id argument >= 0 removes the ID from the session tracker.
+ * An id argument of -1 means "untrack all IDs".
+ *
+ * Return 0 on success else a negative LTTng error code.
+ */
+extern int lttng_untrack_id(struct lttng_handle *handle,
+ enum lttng_tracker_type tracker_type,
+ struct lttng_tracker_id *id);
+
+/*
+ * List IDs in the tracker.
+ *
+ * tracker_type is the type of tracker.
+ * ids is set to an allocated array of IDs currently tracked. On
+ * success, ids and the strings it contains must be freed by the
+ * caller.
+ * nr_ids is set to the number of entries contained by the ids array.
+ *
+ * Returns 0 on success, else a negative LTTng error code.
+ */
+extern int lttng_list_tracker_ids(struct lttng_handle *handle,
+ enum lttng_tracker_type tracker_type,
+ struct lttng_tracker_id **ids,
+ size_t *nr_ids);
+
/*
* Add PID to session tracker.
*
*/
extern int lttng_untrack_pid(struct lttng_handle *handle, int pid);
+/*
+ * List PIDs in the tracker.
+ *
+ * enabled is set to whether the PID tracker is enabled.
+ * pids is set to an allocated array of PIDs currently tracked. On
+ * success, pids must be freed by the caller.
+ * nr_pids is set to the number of entries contained by the pids array.
+ *
+ * Returns 0 on success, else a negative LTTng error code.
+ */
+extern int lttng_list_tracker_pids(struct lttng_handle *handle,
+ int *enabled, int32_t **pids, size_t *nr_pids);
+
#ifdef __cplusplus
}
#endif