#include <urcu-bp.h>
#include <urcu/list.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
struct tracepoint_probe {
void *func;
void *data;
*/
#define tracepoint(name, args...) __trace_##name(args)
-/*
- * These weak symbols, the constructor, and destructor take care of
- * registering only _one_ instance of the tracepoints per shared-ojbect
- * (or for the whole main program).
- * The dummy tracepoint entry ensures that the start/stop pointers get
- * initialized by the linker when no tracepoints are present in a
- * shared-object (or main program).
- */
-extern struct tracepoint * const __start___tracepoints_ptrs[]
- __attribute__((weak, visibility("hidden")));
-extern struct tracepoint * const __stop___tracepoints_ptrs[]
- __attribute__((weak, visibility("hidden")));
-int __tracepoint_registered
- __attribute__((weak, visibility("hidden")));
-
-static void __attribute__((constructor)) __tracepoints__init(void)
-{
- if (__tracepoint_registered++)
- return;
- tracepoint_register_lib(__start___tracepoints_ptrs,
- __stop___tracepoints_ptrs -
- __start___tracepoints_ptrs);
-}
-
-static void __attribute__((destructor)) __tracepoints__destroy(void)
-{
- if (--__tracepoint_registered)
- return;
- tracepoint_unregister_lib(__start___tracepoints_ptrs);
-}
-
/*
* it_func[0] is never NULL because there is at least one element in the array
* when the array itself is non NULL.
do { \
__tp_it_func = __tp_it_probe_ptr->func; \
__tp_cb_data = __tp_it_probe_ptr->data; \
- ((void(*)(proto))__tp_it_func)(args); \
+ URCU_FORCE_CAST(void(*)(proto), __tp_it_func)(args); \
} while ((++__tp_it_probe_ptr)->func); \
} \
rcu_read_unlock(); \
#define __CHECK_TRACE(name, proto, args) \
do { \
- if (unlikely(__tracepoint_##name.state)) \
+ if (caa_unlikely(__tracepoint_##name.state)) \
__DO_TRACE(&__tracepoint_##name, \
TP_PROTO(proto), TP_ARGS(args)); \
} while (0)
{ \
return __tracepoint_probe_register(#name, (void *)probe,\
data); \
- \
} \
static inline int \
__unregister_trace_##name(void (*probe)(data_proto), void *data)\
extern
int tracepoint_unregister_lib(struct tracepoint * const *tracepoints_start);
+/*
+ * These weak symbols, the constructor, and destructor take care of
+ * registering only _one_ instance of the tracepoints per shared-ojbect
+ * (or for the whole main program).
+ */
+extern struct tracepoint * const __start___tracepoints_ptrs[]
+ __attribute__((weak, visibility("hidden")));
+extern struct tracepoint * const __stop___tracepoints_ptrs[]
+ __attribute__((weak, visibility("hidden")));
+int __tracepoint_registered
+ __attribute__((weak, visibility("hidden")));
+
+static void __attribute__((constructor)) __tracepoints__init(void)
+{
+ if (__tracepoint_registered++)
+ return;
+ tracepoint_register_lib(__start___tracepoints_ptrs,
+ __stop___tracepoints_ptrs -
+ __start___tracepoints_ptrs);
+}
+
+static void __attribute__((destructor)) __tracepoints__destroy(void)
+{
+ if (--__tracepoint_registered)
+ return;
+ tracepoint_unregister_lib(__start___tracepoints_ptrs);
+}
#ifndef TRACEPOINT_EVENT
/*
*
* Firstly, name your tracepoint via TRACEPOINT_EVENT(name,
*
+ * The name should be a proper C99 identifier.
* The "name" MUST follow these rules to ensure no namespace clash
* occurs:
*
* ctf_integer(int, next_prio, next->prio)
* )
* )
+ *
+ * Do _NOT_ add comma (,) nor semicolon (;) after the TRACEPOINT_EVENT
+ * declaration.
+ *
+ * The TRACEPOINT_SYSTEM must be defined when declaring a
+ * TRACEPOINT_EVENT. See ust/tracepoint-event.h for information about
+ * usage of other macros controlling TRACEPOINT_EVENT.
*/
#define TRACEPOINT_EVENT(name, proto, args, fields) \
#endif /* #ifndef TRACEPOINT_EVENT */
+#ifndef TRACEPOINT_LOGLEVEL
+
+/*
+ * Tracepoint Loglevel Declaration Facility
+ *
+ * This is a place-holder the tracepoint loglevel declaration,
+ * overridden by the tracer implementation.
+ *
+ * Typical use of these loglevels:
+ *
+ * 1) Declare the mapping between loglevel names and an integer values
+ * within TRACEPOINT_LOGLEVEL_ENUM, using TP_LOGLEVEL for each tuple.
+ * Do _NOT_ add comma (,) nor semicolon (;) between the
+ * TRACEPOINT_LOGLEVEL_ENUM entries. Do _NOT_ add comma (,) nor
+ * semicolon (;) after the TRACEPOINT_LOGLEVEL_ENUM declaration. The
+ * name should be a proper C99 identifier.
+ *
+ * TRACEPOINT_LOGLEVEL_ENUM(
+ * TP_LOGLEVEL( < loglevel_name >, < value > )
+ * TP_LOGLEVEL( < loglevel_name >, < value > )
+ * ...
+ * )
+ *
+ * e.g.:
+ *
+ * TRACEPOINT_LOGLEVEL_ENUM(
+ * TP_LOGLEVEL(LOG_EMERG, 0)
+ * TP_LOGLEVEL(LOG_ALERT, 1)
+ * TP_LOGLEVEL(LOG_CRIT, 2)
+ * TP_LOGLEVEL(LOG_ERR, 3)
+ * TP_LOGLEVEL(LOG_WARNING, 4)
+ * TP_LOGLEVEL(LOG_NOTICE, 5)
+ * TP_LOGLEVEL(LOG_INFO, 6)
+ * TP_LOGLEVEL(LOG_DEBUG, 7)
+ * )
+ *
+ * 2) Then, declare tracepoint loglevels for tracepoints. A
+ * TRACEPOINT_EVENT should be declared prior to the the
+ * TRACEPOINT_LOGLEVEL for a given tracepoint name. The first field
+ * is the name of the tracepoint, the second field is the loglevel
+ * name.
+ *
+ * TRACEPOINT_LOGLEVEL(< [com_company_]project_[component_]event >,
+ * < loglevel_name >)
+ *
+ * The TRACEPOINT_SYSTEM must be defined when declaring a
+ * TRACEPOINT_LOGLEVEL_ENUM and TRACEPOINT_LOGLEVEL. The tracepoint
+ * loglevel enumeration apply to the entire TRACEPOINT_SYSTEM. Only one
+ * tracepoint loglevel enumeration should be declared per tracepoint
+ * system.
+ */
+
+#define TRACEPOINT_LOGLEVEL_ENUM()
+#define TRACEPOINT_LOGLEVEL(name, loglevel)
+
+#endif /* #ifndef TRACEPOINT_LOGLEVEL */
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* _UST_TRACEPOINT_H */
projects / lttng-ust.git / blobdiff