* Older tracepoint providers can always register to newer lttng-ust
* library, but the opposite is rejected: a newer tracepoint provider is
* rejected by an older lttng-ust library.
+ *
+ * LTTNG_UST_PROVIDER_MAJOR_OLDEST_COMPATIBLE is the floor value of
+ * oldest provider major version currently allowed, typically increased
+ * when LTTng-UST has an ABI-breaking soname bump.
*/
-#define LTTNG_UST_PROVIDER_MAJOR 2
+#define LTTNG_UST_PROVIDER_MAJOR 3
+#define LTTNG_UST_PROVIDER_MAJOR_OLDEST_COMPATIBLE 3
#define LTTNG_UST_PROVIDER_MINOR 0
struct lttng_ust_channel_buffer;
.size = sizeof(_type) * CHAR_BIT, \
.alignment = lttng_ust_rb_alignof(_type) * CHAR_BIT, \
.signedness = lttng_ust_is_signed_type(_type), \
- .reverse_byte_order = _byte_order != BYTE_ORDER, \
+ .reverse_byte_order = _byte_order != LTTNG_UST_BYTE_ORDER, \
.base = _base, \
}))
- lttng_ust_float_mant_dig(_type), \
.mant_dig = lttng_ust_float_mant_dig(_type), \
.alignment = lttng_ust_rb_alignof(_type) * CHAR_BIT, \
- .reverse_byte_order = BYTE_ORDER != FLOAT_WORD_ORDER, \
+ .reverse_byte_order = LTTNG_UST_BYTE_ORDER != LTTNG_UST_FLOAT_WORD_ORDER, \
}))
struct lttng_ust_type_sequence {
struct lttng_ust_type_common parent;
uint32_t struct_size;
- const char *length_name; /* Length field name. */
+ const char *length_name; /* Length field name. If NULL, use previous field. */
const struct lttng_ust_type_common *elem_type;
unsigned int alignment; /* Minimum alignment before elements. */
enum lttng_ust_string_encoding encoding;
struct lttng_ust_type_common parent;
uint32_t struct_size;
unsigned int nr_fields;
- const struct lttng_ust_event_field **fields; /* Array of pointers to fields. */
- unsigned int alignment; /* Minimum alignment for this type. */
+ const struct lttng_ust_event_field * const *fields; /* Array of pointers to fields. */
+ unsigned int alignment; /* Minimum alignment for this type. */
};
/*
uint32_t struct_size;
const char *name;
- const struct lttng_ust_enum_entry **entries;
+ const struct lttng_ust_enum_entry * const *entries;
unsigned int nr_entries;
/* End of base ABI. Fields below should be used after checking struct_size. */
/* End of base ABI. Fields below should be used after checking struct_size. */
};
+/*
+ * Tracepoint class description
+ *
+ * IMPORTANT: this structure is part of the ABI between the probe and
+ * UST. Fields need to be only added at the end, never reordered, never
+ * removed.
+ *
+ * The field @struct_size should be used to determine the size of the
+ * structure. It should be queried before using additional fields added
+ * at the end of the structure.
+ */
+
+struct lttng_ust_tracepoint_class {
+ uint32_t struct_size;
+
+ const struct lttng_ust_event_field * const *fields;
+ size_t nr_fields;
+ void (*probe_callback)(void);
+ const char *signature; /* Argument types/names received */
+
+ /* End of base ABI. Fields below should be used after checking struct_size. */
+};
/*
* IMPORTANT: this structure is part of the ABI between the probe and
const char *event_name;
const struct lttng_ust_probe_desc *probe_desc;
- void (*probe_callback)(void);
- const struct lttng_ust_event_field **fields; /* event payload */
- unsigned int nr_fields;
+ const struct lttng_ust_tracepoint_class *tp_class;
const int **loglevel;
- const char *signature; /* Argument types/names received */
const char **model_emf_uri;
/* End of base ABI. Fields below should be used after checking struct_size. */
uint32_t struct_size; /* Size of this structure. */
const char *provider_name;
- const struct lttng_ust_event_desc **event_desc;
+ const struct lttng_ust_event_desc * const *event_desc;
unsigned int nr_events;
uint32_t major;
uint32_t minor;
/* Data structures used by the tracer. */
+/*
+ * IMPORTANT: this structure is part of the ABI between the probe and
+ * UST. Fields need to be only added at the end, never reordered, never
+ * removed.
+ *
+ * The field @struct_size should be used to determine the size of the
+ * structure. It should be queried before using additional fields added
+ * at the end of the structure.
+ *
+ * The probe_ctx is not const because it may be extended to add future
+ * fields which could be modified by callbacks.
+ */
+struct lttng_ust_probe_ctx {
+ uint32_t struct_size; /* Size of this structure. */
+
+ void *ip; /* caller ip address */
+
+ /* End of base ABI. Fields below should be used after checking struct_size. */
+};
+
/*
* lttng_event structure is referred to by the tracing fast path. It
* must be kept small.
int eval_filter; /* Need to evaluate filters */
int (*run_filter)(const struct lttng_ust_event_common *event,
const char *stack_data,
+ struct lttng_ust_probe_ctx *probe_ctx,
void *filter_ctx);
/* End of base ABI. Fields below should be used after checking struct_size. */
struct lttng_ust_notification_ctx {
uint32_t struct_size; /* Size of this structure. */
int eval_capture; /* Capture evaluation available. */
-
/* End of base ABI. Fields below should be used after checking struct_size. */
};
int eval_capture; /* Need to evaluate capture */
void (*notification_send)(const struct lttng_ust_event_notifier *event_notifier,
const char *stack_data,
+ struct lttng_ust_probe_ctx *probe_ctx,
struct lttng_ust_notification_ctx *notif_ctx);
/* End of base ABI. Fields below should be used after checking struct_size. */