#include <stdio.h>
#include <urcu/compiler.h>
#include <lttng/ust-events.h>
-#include <lttng/usterr-signal-safe.h>
#include <lttng/ringbuffer-config.h>
+#include <string.h>
/*
* Macro declarations used for all stages.
/*
* Stage 3 of tracepoint event generation.
*
- * Create an array of events.
- */
-
-/* Reset all macros within TRACEPOINT_EVENT */
-#include <lttng/ust-tracepoint-event-reset.h>
-
-#undef TRACEPOINT_EVENT_INSTANCE
-#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
- { \
- .fields = __event_fields___##_provider##___##_template,\
- .name = #_provider ":" #_name, \
- .probe_callback = (void *) &__event_probe__##_provider##___##_template,\
- .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
- },
-
-static const struct lttng_event_desc _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
-#include TRACEPOINT_INCLUDE
-};
-
-
-/*
- * Stage 4 of tracepoint event generation.
- *
- * Create a toplevel descriptor for the whole probe.
- */
-
-/* non-const because list head will be modified when registered. */
-static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
- .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
- .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
-};
-
-/*
- * Stage 5 of tracepoint event generation.
- *
* Create static inline function that calculates event size.
*/
#include TRACEPOINT_INCLUDE
/*
- * Stage 6 of tracepoint event generation.
+ * Stage 4 of tracepoint event generation.
*
* Create static inline function that calculates event payload alignment.
*/
/*
- * Stage 7 of tracepoint event generation.
+ * Stage 5 of tracepoint event generation.
*
* Create the probe function. This function calls event size calculation
* and writes event data into the buffer.
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
{ \
- struct ltt_event *__event = __tp_cb_data; \
+ struct ltt_event *__event = __tp_data; \
struct ltt_channel *__chan = __event->chan; \
- struct lttng_ust_lib_ring_buffer_ctx __ctx; \
+ struct lttng_ust_lib_ring_buffer_ctx __ctx; \
size_t __event_len, __event_align; \
size_t __dynamic_len_idx = 0; \
size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
#undef __get_dynamic_len
/*
- * Stage 8 of tracepoint event generation.
+ * Stage 6.1 of tracepoint event generation.
+ *
+ * Tracepoint loglevel enumeration definition generation.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TRACEPOINT_LOGLEVEL_ENUM
+#define TRACEPOINT_LOGLEVEL_ENUM(...) __VA_ARGS__
+
+#undef tp_loglevel
+#define tp_loglevel(_identifier, _value) \
+static const struct tracepoint_loglevel_entry \
+ _TP_COMBINE_TOKENS4(__tp_loglevel_entry__, TRACEPOINT_PROVIDER, ___, _identifier) = { \
+ .identifier = #_identifier, \
+ .value = (_value), \
+ };
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 6.2 of tracepoint event generation.
+ *
+ * Tracepoint loglevel enumeration array generation.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TRACEPOINT_LOGLEVEL_ENUM
+#define TRACEPOINT_LOGLEVEL_ENUM(...) __VA_ARGS__
+
+#undef tp_loglevel
+#define tp_loglevel(_identifier, _value) \
+ &_TP_COMBINE_TOKENS4(__tp_loglevel_entry__, TRACEPOINT_PROVIDER, ___, _identifier), \
+
+static const struct tracepoint_loglevel_entry *_TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER)[] = {
+#include TRACEPOINT_INCLUDE
+};
+
+/*
+ * Stage 7 of tracepoint event generation.
+ *
+ * Tracepoint loglevel mapping definition generation. We generate a
+ * symbol for each mapping for a provider/event to ensure at most a 1 to
+ * 1 mapping between events and loglevels. If the symbol is repeated,
+ * the compiler will complain.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TRACEPOINT_LOGLEVEL
+#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
+static const struct tracepoint_loglevel_entry * \
+ _loglevel_mapping___##__provider##___##__name = \
+ &__tp_loglevel_entry__##__provider##___##__loglevel;
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 8.1 of tracepoint event generation.
+ *
+ * Create events description structures. We use a weakref because
+ * loglevels are optional. If not declared, the event will point to the
+ * a loglevel that contains NULL.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TRACEPOINT_EVENT_INSTANCE
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+static const struct tracepoint_loglevel_entry * \
+ __ref_loglevel_mapping___##_provider##___##_name \
+ __attribute__((weakref ("_loglevel_mapping___" #_provider "___" #_name))); \
+const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
+ .fields = __event_fields___##_provider##___##_template, \
+ .name = #_provider ":" #_name, \
+ .probe_callback = (void *) &__event_probe__##_provider##___##_template,\
+ .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
+ .loglevel = &__ref_loglevel_mapping___##_provider##___##_name, \
+};
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 8.2 of tracepoint event generation.
+ *
+ * Create array of events.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TRACEPOINT_EVENT_INSTANCE
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+ &__event_desc___##_provider##_##_name,
+
+static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
+#include TRACEPOINT_INCLUDE
+};
+
+
+/*
+ * Stage 9 of tracepoint event generation.
+ *
+ * Create a toplevel descriptor for the whole probe.
+ */
+
+/* non-const because list head will be modified when registered. */
+static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
+ .provider = __tp_stringify(TRACEPOINT_PROVIDER),
+ .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
+ .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
+ .loglevels = _TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER),
+ .nr_loglevels = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER)),
+};
+
+/*
+ * Stage 10 of tracepoint event generation.
*
* Register/unregister probes at module load/unload.
*/