struct ltt_session;
struct lib_ring_buffer_ctx;
+/* Type description */
+
+/* Update the astract_types name table in lttng-types.c along with this enum */
+enum abstract_types {
+ atype_integer,
+ atype_enum,
+ atype_array,
+ atype_sequence,
+ atype_string,
+ NR_ABSTRACT_TYPES,
+};
+
+/* Update the string_encodings name table in lttng-types.c along with this enum */
+enum lttng_string_encodings {
+ lttng_encode_UTF8 = 0,
+ lttng_encode_ASCII = 1,
+ NR_STRING_ENCODINGS,
+};
+
+struct lttng_enum_entry {
+ unsigned long long start, end; /* start and end are inclusive */
+ const char *string;
+};
+
+struct lttng_enum {
+ const struct lttng_enum_entry *entries;
+ unsigned int len;
+};
+
+struct lttng_type {
+ enum abstract_types atype;
+ const char *name;
+ union {
+ struct {
+ unsigned int size; /* in bits */
+ unsigned short alignment; /* in bits */
+ unsigned int signedness:1;
+ unsigned int reverse_byte_order:1;
+ } integer;
+ struct {
+ const char *parent_type;
+ const struct lttng_enum def;
+ } enumeration;
+ struct {
+ const char *elem_type;
+ unsigned int length; /* num. elems. */
+ } array;
+ struct {
+ const char *elem_type;
+ const char *length_type;
+ } sequence;
+ struct {
+ enum lttng_string_encodings encoding;
+ } string;
+ } u;
+} __attribute__((packed));
+
+/* Event field description */
+
+struct lttng_event_field {
+ const char *name;
+ const struct lttng_type type;
+};
+
+struct lttng_event_desc {
+ const struct lttng_event_field *fields;
+ const char *name;
+ void *probe_callback;
+ unsigned int nr_fields;
+};
+
+struct lttng_probe_desc {
+ const struct lttng_event_desc *event_desc;
+ unsigned int nr_events;
+ struct list_head head; /* chain registered probes */
+};
+
/*
* ltt_event structure is referred to by the tracing fast path. It must be
* kept small.
struct ltt_event {
unsigned int id;
struct ltt_channel *chan;
- void *probe;
+ const struct lttng_event_desc *desc;
void *filter;
- char *name;
enum instrum_type itype;
struct list_head list; /* Event list */
};
void ltt_session_destroy(struct ltt_session *session);
struct ltt_channel *ltt_channel_create(struct ltt_session *session,
+ const char *transport_name,
+ void *buf_addr,
+ size_t subbuf_size, size_t num_subbuf,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval);
+struct ltt_channel *ltt_global_channel_create(struct ltt_session *session,
int overwrite, void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
struct ltt_event *ltt_event_create(struct ltt_channel *chan,
char *name,
enum instrum_type itype,
- void *probe, void *filter);
-int _ltt_event_destroy(struct ltt_event *event);
+ const struct lttng_event_desc *event_desc,
+ void *filter);
+int _ltt_event_unregister(struct ltt_event *event);
+void _ltt_event_destroy(struct ltt_event *event);
void ltt_transport_register(struct ltt_transport *transport);
void ltt_transport_unregister(struct ltt_transport *transport);
int ltt_debugfs_abi_init(void);
void ltt_debugfs_abi_exit(void);
-int ltt_probe_register(const char *name, void *cb);
-void ltt_probe_unregister(const char *name);
-void *ltt_probe_get(const char *name);
-void ltt_probe_put(void *cb);
-int ltt_probes_init(void);
-void ltt_probes_exit(void);
+int ltt_probe_register(struct lttng_probe_desc *desc);
+void ltt_probe_unregister(struct lttng_probe_desc *desc);
+const struct lttng_event_desc *ltt_event_get(const char *name);
+void ltt_event_put(const struct lttng_event_desc *desc);
#endif /* _LTT_EVENTS_H */