extern "C" {
#endif
+#include <lttng/constant.h>
+
+enum lttng_tracker_type {
+ LTTNG_TRACKER_PID = 0,
+ LTTNG_TRACKER_VPID = 1,
+ LTTNG_TRACKER_UID = 2,
+ LTTNG_TRACKER_GID = 3,
+ LTTNG_TRACKER_VUID = 4,
+ LTTNG_TRACKER_VGID = 5,
+};
+
+enum lttng_tracker_id_type {
+ LTTNG_ID_UNKNOWN = -1,
+ LTTNG_ID_ALL = 0,
+ LTTNG_ID_VALUE = 1,
+ LTTNG_ID_STRING = 2,
+};
+
+struct lttng_tracker_id {
+ enum lttng_tracker_id_type type;
+ int value;
+ char *string;
+};
+
+struct lttng_handle;
struct lttng_session_descriptor;
struct lttng_destruction_handle;
*
* The structures should be initialized to zero before use.
*/
-#define LTTNG_SESSION_PADDING1 12
+#define LTTNG_SESSION_PADDING1 8
struct lttng_session {
char name[LTTNG_NAME_MAX];
/*
uint32_t snapshot_mode;
unsigned int live_timer_interval; /* usec */
+ /*
+ * End of public attributes.
+ * The remaining fields are used to deal with ABI management concerns.
+ */
+
+ /*
+ * 32-bit architectures are already naturally aligned on 4 bytes after
+ * 'live_timer_interval'. However, the offset does not result in a
+ * natural alignment on 64-bit architectures. Adding 4 bytes of
+ * padding here results in an aligned offset after 'alignement_padding'
+ * for both bitnesses.
+ *
+ * This was added since not all compilers appear to align unions in the
+ * same way. Some (e.g. MSVC) do not seem to impose an alignement
+ * constraint while others (e.g. gcc, clang, icc) seem to align it to
+ * ensure 'ptr' is naturally aligned.
+ */
+ char alignment_padding[4];
union {
+ /*
+ * Ensure the 'extended' union has the same size for both
+ * 32-bit and 64-bit builds.
+ */
char padding[LTTNG_SESSION_PADDING1];
void *ptr;
} extended;
* an lttng_destruction_handle which can be used to wait for the completion
* of the session's destruction. The lttng_destroy_handle can also be used
* obtain the status and archive location of any implicit session
- * rotation that may have occured during the session's destruction.
+ * rotation that may have occurred during the session's destruction.
*
* Returns LTTNG_OK on success. The returned handle is owned by the caller
* and must be free'd using lttng_destruction_handle_destroy().
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.
+ * id the id to track.
+ *
+ * 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,
+ const struct lttng_tracker_id *id);
+
+/*
+ * Remove ID from session tracker.
+ *
+ * tracker_type is the type of tracker.
+ * id the id to untrack.
+ *
+ * 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,
+ const 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.
*