* it_func[0] is never NULL because there is at least one element in the array
* when the array itself is non NULL.
*/
-#define __DO_TRACE(tp, proto, args) \
+#define __DO_TRACE(tp, proto, vars) \
do { \
struct tracepoint_probe *__tp_it_probe_ptr; \
void *__tp_it_func; \
do { \
__tp_it_func = __tp_it_probe_ptr->func; \
__tp_cb_data = __tp_it_probe_ptr->data; \
- URCU_FORCE_CAST(void(*)(proto), __tp_it_func)(args); \
+ URCU_FORCE_CAST(void(*)(proto), __tp_it_func)(vars); \
} while ((++__tp_it_probe_ptr)->func); \
} \
rcu_read_unlock(); \
} while (0)
#define TP_PARAMS(args...) args
-#define TP_PROTO(args...) args
-#define TP_VARS(args...) args
+#define TP_ARGS(args...) args
+
+/*
+ * TP_ARGS takes tuples of type, argument separated by a comma. It can
+ * take up to 10 tuples (which means that less than 10 tuples is fine
+ * too). Each tuple is also separated by a comma.
+ */
+
+#define TP_COMBINE_TOKENS1(_tokena, _tokenb) _tokena##_tokenb
+#define TP_COMBINE_TOKENS(_tokena, _tokenb) TP_COMBINE_TOKENS1(_tokena, _tokenb)
+
+/* _TP_EVEN* extracts the vars names. */
+#define _TP_EVEN0()
+#define _TP_EVEN2(a,b) b
+#define _TP_EVEN4(a,b,c,d) b,d
+#define _TP_EVEN6(a,b,c,d,e,f) b,d,f
+#define _TP_EVEN8(a,b,c,d,e,f,g,h) b,d,f,h
+#define _TP_EVEN10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j
+#define _TP_EVEN12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l
+#define _TP_EVEN14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) b,d,f,h,j,l,n
+#define _TP_EVEN16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) b,d,f,h,j,l,n,p
+#define _TP_EVEN18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) b,d,f,h,j,l,n,p,r
+#define _TP_EVEN20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) b,d,f,h,j,l,n,p,r,t
+
+#define _TP_EVEN_DATA0() __tp_cb_data
+#define _TP_EVEN_DATA2(a,b) __tp_cb_data,b
+#define _TP_EVEN_DATA4(a,b,c,d) __tp_cb_data,b,d
+#define _TP_EVEN_DATA6(a,b,c,d,e,f) __tp_cb_data,b,d,f
+#define _TP_EVEN_DATA8(a,b,c,d,e,f,g,h) __tp_cb_data,b,d,f,h
+#define _TP_EVEN_DATA10(a,b,c,d,e,f,g,h,i,j) __tp_cb_data,b,d,f,h,j
+#define _TP_EVEN_DATA12(a,b,c,d,e,f,g,h,i,j,k,l) __tp_cb_data,b,d,f,h,j,l
+#define _TP_EVEN_DATA14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) __tp_cb_data,b,d,f,h,j,l,n
+#define _TP_EVEN_DATA16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) __tp_cb_data,b,d,f,h,j,l,n,p
+#define _TP_EVEN_DATA18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) __tp_cb_data,b,d,f,h,j,l,n,p,r
+#define _TP_EVEN_DATA20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) __tp_cb_data,b,d,f,h,j,l,n,p,r,t
+
+/* _TP_SPLIT extracts tuples of type, var */
+#define _TP_SPLIT0()
+#define _TP_SPLIT2(a,b) a b
+#define _TP_SPLIT4(a,b,c,d) a b,c d
+#define _TP_SPLIT6(a,b,c,d,e,f) a b,c d,e f
+#define _TP_SPLIT8(a,b,c,d,e,f,g,h) a b,c d,e f,g h
+#define _TP_SPLIT10(a,b,c,d,e,f,g,h,i,j) a b,c d,e f,g h,i j
+#define _TP_SPLIT12(a,b,c,d,e,f,g,h,i,j,k,l) a b,c d,e f,g h,i j,k l
+#define _TP_SPLIT14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) a b,c d,e f,g h,i j,k l,m n
+#define _TP_SPLIT16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) a b,c d,e f,g h,i j,k l,m n,o p
+#define _TP_SPLIT18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) a b,c d,e f,g h,i j,k l,m n,o p,q r
+#define _TP_SPLIT20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) a b,c d,e f,g h,i j,k l,m n,o p,q r,s t
+
+#define _TP_SPLIT_DATA0() void *__tp_cb_data
+#define _TP_SPLIT_DATA2(a,b) void *__tp_cb_data,a b
+#define _TP_SPLIT_DATA4(a,b,c,d) void *__tp_cb_data,a b,c d
+#define _TP_SPLIT_DATA6(a,b,c,d,e,f) void *__tp_cb_data,a b,c d,e f
+#define _TP_SPLIT_DATA8(a,b,c,d,e,f,g,h) void *__tp_cb_data,a b,c d,e f,g h
+#define _TP_SPLIT_DATA10(a,b,c,d,e,f,g,h,i,j) void *__tp_cb_data,a b,c d,e f,g h,i j
+#define _TP_SPLIT_DATA12(a,b,c,d,e,f,g,h,i,j,k,l) void *__tp_cb_data,a b,c d,e f,g h,i j,k l
+#define _TP_SPLIT_DATA14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) void *__tp_cb_data,a b,c d,e f,g h,i j,k l,m n
+#define _TP_SPLIT_DATA16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) void *__tp_cb_data,a b,c d,e f,g h,i j,k l,m n,o p
+#define _TP_SPLIT_DATA18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) void *__tp_cb_data,a b,c d,e f,g h,i j,k l,m n,o p,q r
+#define _TP_SPLIT_DATA20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) void *__tp_cb_data,a b,c d,e f,g h,i j,k l,m n,o p,q r,s t
+
+/* Preprocessor trick to count arguments. Inspired from sdt.h. */
+#define _TP_NARGS(...) __TP_NARGS(__VA_ARGS__, 20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
+#define __TP_NARGS(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, N, ...) N
+#define _TP_PROTO_N(N, ...) \
+ TP_PARAMS(TP_COMBINE_TOKENS(_TP_SPLIT, N)(__VA_ARGS__))
+#define _TP_VARS_N(N, ...) \
+ TP_PARAMS(TP_COMBINE_TOKENS(_TP_EVEN, N)(__VA_ARGS__))
+#define _TP_PROTO_DATA_N(N, ...) \
+ TP_PARAMS(TP_COMBINE_TOKENS(_TP_SPLIT_DATA, N)(__VA_ARGS__))
+#define _TP_VARS_DATA_N(N, ...) \
+ TP_PARAMS(TP_COMBINE_TOKENS(_TP_EVEN_DATA, N)(__VA_ARGS__))
+
+#define _TP_ARGS_PROTO(...) _TP_PROTO_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
+#define _TP_ARGS_VARS(...) _TP_VARS_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
+
+#define _TP_ARGS_PROTO_DATA(...) _TP_PROTO_DATA_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
+#define _TP_ARGS_VARS_DATA(...) _TP_VARS_DATA_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
#define __CHECK_TRACE(provider, name, proto, args) \
do { \
if (caa_unlikely(__tracepoint_##provider##___##name.state)) \
__DO_TRACE(&__tracepoint_##provider##___##name, \
- TP_PROTO(proto), TP_VARS(args)); \
+ TP_PARAMS(proto), TP_PARAMS(args)); \
} while (0)
/*
extern struct tracepoint __tracepoint_##provider##___##name; \
static inline void __trace_##provider##___##name(proto) \
{ \
- __CHECK_TRACE(provider, name, TP_PROTO(data_proto), \
- TP_VARS(data_args)); \
+ __CHECK_TRACE(provider, name, TP_PARAMS(data_proto), \
+ TP_PARAMS(data_args)); \
} \
static inline int \
__register_trace_##provider##___##name(void (*probe)(data_proto), void *data) \
data); \
}
-/*
- * The need for the _DECLARE_TRACEPOINT_NOARGS() is to handle the prototype
- * (void). "void" is a special value in a function prototype and can
- * not be combined with other arguments. Since the DECLARE_TRACEPOINT()
- * macro adds a data element at the beginning of the prototype,
- * we need a way to differentiate "(void *data, proto)" from
- * "(void *data, void)". The second prototype is invalid.
- *
- * DECLARE_TRACEPOINT_NOARGS() passes "void" as the tracepoint prototype
- * and "void *__tp_cb_data" as the callback prototype.
- *
- * DECLARE_TRACEPOINT() passes "proto" as the tracepoint protoype and
- * "void *__tp_cb_data, proto" as the callback prototype.
- */
-#define _DECLARE_TRACEPOINT_NOARGS(provider, name) \
- __DECLARE_TRACEPOINT(provider, name, void, , void *__tp_cb_data, __tp_cb_data)
-
-#define _DECLARE_TRACEPOINT(provider, name, proto, args) \
- __DECLARE_TRACEPOINT(provider, name, TP_PARAMS(proto), TP_PARAMS(args), \
- TP_PARAMS(void *__tp_cb_data, proto), \
- TP_PARAMS(__tp_cb_data, args))
+#define _DECLARE_TRACEPOINT(provider, name, args) \
+ __DECLARE_TRACEPOINT(provider, name, _TP_ARGS_PROTO(args), _TP_ARGS_VARS(args), \
+ _TP_ARGS_PROTO_DATA(args), _TP_ARGS_VARS_DATA(args))
/*
* __tracepoints_ptrs section is not const (read-only) to let the linker update
* In short, an example:
*
* TRACEPOINT_EVENT(< [com_company_]project[_component] >, < event >,
- * TP_PROTO(int arg0, void *arg1, char *string, size_t strlen,
- * long *arg4, size_t arg4_len),
- * TP_VARS(arg0, arg1, string, strlen, arg4, arg4_len),
+ *
+ * * TP_ARGS takes from 0 to 10 "type, field_name" pairs *
+ *
+ * TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen,
+ * long *, arg4, size_t, arg4_len),
* TP_FIELDS(
*
* * Integer, printed in base 10 *
* TRACEPOINT_EVENT(someproject_sched, switch,
*
* *
- * * A function has a regular function arguments
- * * prototype, declare it via TP_PROTO():
- * *
- *
- * TP_PROTO(struct rq *rq, struct task_struct *prev,
- * struct task_struct *next),
- *
- * *
- * * Define the call signature of the 'function'.
- * * (Design sidenote: we use this instead of a
- * * TP_PROTO1/TP_PROTO2/TP_PROTO3 ugliness.)
+ * * Arguments to pass to the tracepoint. Supports from
+ * * 0 to 10 "type, name" tuples.
* *
*
- * TP_VARS(rq, prev, next),
+ * TP_ARGS(struct rq *, rq, struct task_struct *, prev,
+ * struct task_struct *, next),
*
* *
* * Fast binary tracing: define the trace record via
* usage of other macros controlling TRACEPOINT_EVENT.
*/
-#define TRACEPOINT_EVENT(provider, name, proto, args, fields) \
- _DECLARE_TRACEPOINT(provider, name, TP_PARAMS(proto), TP_PARAMS(args))
-
-#define TRACEPOINT_EVENT_CLASS(provider, name, proto, args, fields)
-#define TRACEPOINT_EVENT_INSTANCE(provider, template, name, proto, args)\
- _DECLARE_TRACEPOINT(provider, name, TP_PARAMS(proto), TP_PARAMS(args))
-
-/*
- * Declaration of tracepoints that take 0 argument.
- */
-#define TRACEPOINT_EVENT_NOARGS(provider, name, fields) \
- _DECLARE_TRACEPOINT_NOARGS(provider, name)
+#define TRACEPOINT_EVENT(provider, name, args, fields) \
+ _DECLARE_TRACEPOINT(provider, name, TP_PARAMS(args))
-#define TRACEPOINT_EVENT_CLASS_NOARGS(provider, name, fields)
-#define TRACEPOINT_EVENT_INSTANCE_NOARGS(provider, template, name) \
- _DECLARE_TRACEPOINT_NOARGS(provider, name)
+#define TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
+#define TRACEPOINT_EVENT_INSTANCE(provider, template, name, args)\
+ _DECLARE_TRACEPOINT(provider, name, TP_PARAMS(args))
#endif /* #ifndef TRACEPOINT_EVENT */
*/
#undef TRACEPOINT_EVENT
-#define TRACEPOINT_EVENT(provider, name, proto, args, fields) \
+#define TRACEPOINT_EVENT(provider, name, args, fields) \
TRACEPOINT_EVENT_CLASS(provider, name, \
- TP_PARAMS(proto), \
TP_PARAMS(args), \
TP_PARAMS(fields)) \
- TRACEPOINT_EVENT_INSTANCE(provider, name, name, TP_PARAMS(proto), TP_PARAMS(args))
-
-#undef TRACEPOINT_EVENT_NOARGS
-#define TRACEPOINT_EVENT_NOARGS(provider, name, fields) \
- TRACEPOINT_EVENT_CLASS_NOARGS(provider, name, \
- TP_PARAMS(fields)) \
- TRACEPOINT_EVENT_INSTANCE_NOARGS(provider, name, name)
+ TRACEPOINT_EVENT_INSTANCE(provider, name, name, TP_PARAMS(args))
/* Helpers */
#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
}
#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
- __tracepoint_provider_mismatch_##_provider();
-
-#undef TRACEPOINT_EVENT_CLASS_NOARGS
-#define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
__tracepoint_provider_mismatch_##_provider();
#undef TRACEPOINT_EVENT_INSTANCE
-#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _proto, _args) \
- __tracepoint_provider_mismatch_##_provider();
-
-#undef TRACEPOINT_EVENT_INSTANCE_NOARGS
-#define TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name) \
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
__tracepoint_provider_mismatch_##_provider();
static __attribute__((unused))
#undef TP_FIELDS
#define TP_FIELDS(args...) args /* Only one used in this phase */
-#undef TRACEPOINT_EVENT_CLASS_NOARGS
-#define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \
+#undef TRACEPOINT_EVENT_CLASS
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
- _fields \
+ _fields \
};
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
- TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, TP_PARAMS(_fields))
-
#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
/*
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+#undef TP_ARGS
+#define TP_ARGS(args...) args
#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
-static void __event_probe__##_provider##___##_name(void *__data, _proto);
-
-#undef TRACEPOINT_EVENT_CLASS_NOARGS
-#define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \
-static void __event_probe__##_provider##___##_name(void *__data);
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static void __event_probe__##_provider##___##_name(_TP_ARGS_PROTO_DATA(_args));
#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#undef TRACEPOINT_EVENT_INSTANCE_NOARGS
-#define TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name) \
+#undef TRACEPOINT_EVENT_INSTANCE
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
{ \
.fields = __event_fields___##_provider##___##_template,\
.name = #_provider ":" #_name, \
.nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
},
-#undef TRACEPOINT_EVENT_INSTANCE
-#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _proto, _args) \
- TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name)
-
#define TP_ID1(_token, _provider) _token##_provider
#define TP_ID(_token, _provider) TP_ID1(_token, _provider)
#define ctf_string(_item, _src) \
__event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+#undef TP_ARGS
+#define TP_ARGS(args...) args
#undef TP_FIELDS
#define TP_FIELDS(args...) args
#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
-static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _proto) \
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_PROTO_DATA(_args)) \
{ \
size_t __event_len = 0; \
unsigned int __dynamic_len_idx = 0; \
#undef ctf_string
#define ctf_string(_item, _src)
-#undef TP_PROTO
-#define TP_PROTO(args...) args
+#undef TP_ARGS
+#define TP_ARGS(args...) args
#undef TP_FIELDS
#define TP_FIELDS(args...) args
#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
-static inline size_t __event_get_align__##_provider##___##_name(_proto) \
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline \
+size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
{ \
size_t __event_align = 1; \
_fields \
#undef __get_dynamic_len
#define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++]
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef TP_VARS
-#define TP_VARS(args...) args
+#undef TP_ARGS
+#define TP_ARGS(args...) args
#undef TP_FIELDS
#define TP_FIELDS(args...) args
#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \
-static void __event_probe__##_provider##___##_name(void *__data, _proto) \
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static void __event_probe__##_provider##___##_name(_TP_ARGS_PROTO_DATA(_args))\
{ \
- struct ltt_event *__event = __data; \
+ struct ltt_event *__event = __tp_cb_data; \
struct ltt_channel *__chan = __event->chan; \
struct lttng_ust_lib_ring_buffer_ctx __ctx; \
size_t __event_len, __event_align; \
return; \
if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
return; \
- __event_len = __event_get_size__##_provider##___##_name(__dynamic_len, _args); \
- __event_align = __event_get_align__##_provider##___##_name(_args); \
- lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
- __event_align, -1, __chan->handle); \
- __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
- if (__ret < 0) \
- return; \
- _fields \
- __chan->ops->event_commit(&__ctx); \
-}
-
-#undef TRACEPOINT_EVENT_CLASS_NOARGS
-#define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \
-static void __event_probe__##_provider##___##_name(void *__data) \
-{ \
- struct ltt_event *__event = __data; \
- struct ltt_channel *__chan = __event->chan; \
- struct lttng_ust_lib_ring_buffer_ctx __ctx; \
- size_t __event_len, __event_align; \
- int __ret; \
- \
- if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \
- return; \
- if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \
- return; \
- if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
- return; \
- __event_len = 0; \
- __event_align = 1; \
+ __event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\
+ _TP_ARGS_VARS_DATA(_args)); \
+ __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VARS(_args)); \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
__event_align, -1, __chan->handle); \
__ret = __chan->ops->event_reserve(&__ctx, __event->id); \
projects / lttng-ust.git / commitdiff
