* 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;
const char *name;
const struct lttng_ust_enum_entry * const *entries;
unsigned int nr_entries;
+ const struct lttng_ust_probe_desc *probe_desc;
/* 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 */
+ const struct lttng_ust_probe_desc *probe_desc;
+
+ /* 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 * const *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. */