Implement loglevels as event and wildcard attributes

[lttng-ust.git] / include / lttng / ust-tracepoint-event.h

diff --git a/include/lttng/ust-tracepoint-event.h b/include/lttng/ust-tracepoint-event.h
index 5066b4b6ad3b814aab3c6f777922e89cae33aee2..dbd0485565cfd18e2d920811d5dbbb3cb4c79f93 100644 (file)
--- a/include/lttng/ust-tracepoint-event.h
+++ b/include/lttng/ust-tracepoint-event.h
@@ -117,6 +117,25 @@ void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
 #include TRACEPOINT_INCLUDE
 }
 
+/*
+ * Stage 0.1 of tracepoint event generation.
+ *
+ * Check that each TRACEPOINT_EVENT provider:name does not exceed the
+ * tracepoint name length limit.
+ */
+
+/* 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 char                                                      \
+       __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
+       __attribute__((unused)) =                                       \
+               #_provider ":" #_name;
+
+#include TRACEPOINT_INCLUDE
+
 /*
  * Stage 1 of tracepoint event generation.
  *
@@ -415,49 +434,7 @@ static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
 #undef __get_dynamic_len
 
 /*
- * 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.
+ * Stage 6 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
@@ -469,15 +446,15 @@ static const struct tracepoint_loglevel_entry *_TP_COMBINE_TOKENS(__tracepoint_l
 #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;
+#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel)               \
+static const int _loglevel_value___##__provider##___##__name = __loglevel; \
+static const int *_loglevel___##__provider##___##__name =                 \
+               &_loglevel_value___##__provider##___##__name;
 
 #include TRACEPOINT_INCLUDE
 
 /*
- * Stage 8.1 of tracepoint event generation.
+ * Stage 7.1 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
@@ -489,21 +466,21 @@ static const struct tracepoint_loglevel_entry *                           \
 
 #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))); \
+static const int *                                                            \
+       __ref_loglevel___##_provider##___##_name                               \
+       __attribute__((weakref ("_loglevel___" #_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,         \
+       .loglevel = &__ref_loglevel___##_provider##___##_name,                 \
 };
 
 #include TRACEPOINT_INCLUDE
 
 /*
- * Stage 8.2 of tracepoint event generation.
+ * Stage 7.2 of tracepoint event generation.
  *
  * Create array of events.
  */
@@ -521,7 +498,7 @@ static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEP
 
 
 /*
- * Stage 9 of tracepoint event generation.
+ * Stage 8 of tracepoint event generation.
  *
  * Create a toplevel descriptor for the whole probe.
  */
@@ -531,12 +508,10 @@ static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PR
        .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.
+ * Stage 9 of tracepoint event generation.
  *
  * Register/unregister probes at module load/unload.
  */