1 #ifndef _LTTNG_TRACEPOINT_H
2 #define _LTTNG_TRACEPOINT_H
5 * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28 #include <lttng/tracepoint-types.h>
29 #include <lttng/tracepoint-rcu.h>
30 #include <urcu/compiler.h>
31 #include <dlfcn.h> /* for dlopen */
32 #include <string.h> /* for memset */
33 #include <lttng/ust-config.h> /* for sdt */
34 #include <lttng/ust-compiler.h>
36 #ifdef LTTNG_UST_HAVE_SDT_INTEGRATION
37 #define SDT_USE_VARIADIC
40 #define STAP_PROBEV(...)
47 #define tracepoint(provider, name, ...) \
49 STAP_PROBEV(provider, name, ## __VA_ARGS__); \
50 if (caa_unlikely(__tracepoint_##provider##___##name.state)) \
51 __tracepoint_cb_##provider##___##name(__VA_ARGS__); \
54 #define TP_ARGS(...) __VA_ARGS__
57 * TP_ARGS takes tuples of type, argument separated by a comma.
58 * It can take up to 10 tuples (which means that less than 10 tuples is
60 * Each tuple is also separated by a comma.
62 #define __TP_COMBINE_TOKENS(_tokena, _tokenb) \
64 #define _TP_COMBINE_TOKENS(_tokena, _tokenb) \
65 __TP_COMBINE_TOKENS(_tokena, _tokenb)
66 #define __TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
67 _tokena##_tokenb##_tokenc
68 #define _TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
69 __TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc)
70 #define __TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
71 _tokena##_tokenb##_tokenc##_tokend
72 #define _TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
73 __TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend)
76 * _TP_EXVAR* extract the var names.
77 * _TP_EXVAR1 and _TP_EXDATA_VAR1 are needed for -std=c99.
81 #define _TP_EXVAR2(a,b) b
82 #define _TP_EXVAR4(a,b,c,d) b,d
83 #define _TP_EXVAR6(a,b,c,d,e,f) b,d,f
84 #define _TP_EXVAR8(a,b,c,d,e,f,g,h) b,d,f,h
85 #define _TP_EXVAR10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j
86 #define _TP_EXVAR12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l
87 #define _TP_EXVAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) b,d,f,h,j,l,n
88 #define _TP_EXVAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) b,d,f,h,j,l,n,p
89 #define _TP_EXVAR18(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
90 #define _TP_EXVAR20(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
92 #define _TP_EXDATA_VAR0() __tp_data
93 #define _TP_EXDATA_VAR1(a) __tp_data
94 #define _TP_EXDATA_VAR2(a,b) __tp_data,b
95 #define _TP_EXDATA_VAR4(a,b,c,d) __tp_data,b,d
96 #define _TP_EXDATA_VAR6(a,b,c,d,e,f) __tp_data,b,d,f
97 #define _TP_EXDATA_VAR8(a,b,c,d,e,f,g,h) __tp_data,b,d,f,h
98 #define _TP_EXDATA_VAR10(a,b,c,d,e,f,g,h,i,j) __tp_data,b,d,f,h,j
99 #define _TP_EXDATA_VAR12(a,b,c,d,e,f,g,h,i,j,k,l) __tp_data,b,d,f,h,j,l
100 #define _TP_EXDATA_VAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) __tp_data,b,d,f,h,j,l,n
101 #define _TP_EXDATA_VAR16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) __tp_data,b,d,f,h,j,l,n,p
102 #define _TP_EXDATA_VAR18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) __tp_data,b,d,f,h,j,l,n,p,r
103 #define _TP_EXDATA_VAR20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) __tp_data,b,d,f,h,j,l,n,p,r,t
106 * _TP_EXPROTO* extract tuples of type, var.
107 * _TP_EXPROTO1 and _TP_EXDATA_PROTO1 are needed for -std=c99.
109 #define _TP_EXPROTO0() void
110 #define _TP_EXPROTO1(a) void
111 #define _TP_EXPROTO2(a,b) a b
112 #define _TP_EXPROTO4(a,b,c,d) a b,c d
113 #define _TP_EXPROTO6(a,b,c,d,e,f) a b,c d,e f
114 #define _TP_EXPROTO8(a,b,c,d,e,f,g,h) a b,c d,e f,g h
115 #define _TP_EXPROTO10(a,b,c,d,e,f,g,h,i,j) a b,c d,e f,g h,i j
116 #define _TP_EXPROTO12(a,b,c,d,e,f,g,h,i,j,k,l) a b,c d,e f,g h,i j,k l
117 #define _TP_EXPROTO14(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
118 #define _TP_EXPROTO16(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
119 #define _TP_EXPROTO18(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
120 #define _TP_EXPROTO20(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
122 #define _TP_EXDATA_PROTO0() void *__tp_data
123 #define _TP_EXDATA_PROTO1(a) void *__tp_data
124 #define _TP_EXDATA_PROTO2(a,b) void *__tp_data,a b
125 #define _TP_EXDATA_PROTO4(a,b,c,d) void *__tp_data,a b,c d
126 #define _TP_EXDATA_PROTO6(a,b,c,d,e,f) void *__tp_data,a b,c d,e f
127 #define _TP_EXDATA_PROTO8(a,b,c,d,e,f,g,h) void *__tp_data,a b,c d,e f,g h
128 #define _TP_EXDATA_PROTO10(a,b,c,d,e,f,g,h,i,j) void *__tp_data,a b,c d,e f,g h,i j
129 #define _TP_EXDATA_PROTO12(a,b,c,d,e,f,g,h,i,j,k,l) void *__tp_data,a b,c d,e f,g h,i j,k l
130 #define _TP_EXDATA_PROTO14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) void *__tp_data,a b,c d,e f,g h,i j,k l,m n
131 #define _TP_EXDATA_PROTO16(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p
132 #define _TP_EXDATA_PROTO18(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r
133 #define _TP_EXDATA_PROTO20(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) void *__tp_data,a b,c d,e f,g h,i j,k l,m n,o p,q r,s t
135 /* Preprocessor trick to count arguments. Inspired from sdt.h. */
136 #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)
137 #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
138 #define _TP_PROTO_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXPROTO, N)(__VA_ARGS__))
139 #define _TP_VAR_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXVAR, N)(__VA_ARGS__))
140 #define _TP_DATA_PROTO_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXDATA_PROTO, N)(__VA_ARGS__))
141 #define _TP_DATA_VAR_N(N, ...) _TP_PARAMS(_TP_COMBINE_TOKENS(_TP_EXDATA_VAR, N)(__VA_ARGS__))
142 #define _TP_ARGS_PROTO(...) _TP_PROTO_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
143 #define _TP_ARGS_VAR(...) _TP_VAR_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
144 #define _TP_ARGS_DATA_PROTO(...) _TP_DATA_PROTO_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
145 #define _TP_ARGS_DATA_VAR(...) _TP_DATA_VAR_N(_TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
146 #define _TP_PARAMS(...) __VA_ARGS__
148 #define _DECLARE_TRACEPOINT(_provider, _name, ...) \
149 extern struct tracepoint __tracepoint_##_provider##___##_name; \
150 static inline lttng_ust_notrace \
151 void __tracepoint_cb_##_provider##___##_name(_TP_ARGS_PROTO(__VA_ARGS__)); \
153 void __tracepoint_cb_##_provider##___##_name(_TP_ARGS_PROTO(__VA_ARGS__)) \
155 struct tracepoint_probe *__tp_probe; \
157 if (caa_unlikely(!TP_RCU_LINK_TEST())) \
159 tp_rcu_read_lock_bp(); \
160 __tp_probe = tp_rcu_dereference_bp(__tracepoint_##_provider##___##_name.probes); \
161 if (caa_unlikely(!__tp_probe)) \
164 void (*__tp_cb)(void) = __tp_probe->func; \
165 void *__tp_data = __tp_probe->data; \
167 URCU_FORCE_CAST(void (*)(_TP_ARGS_DATA_PROTO(__VA_ARGS__)), __tp_cb) \
168 (_TP_ARGS_DATA_VAR(__VA_ARGS__)); \
169 } while ((++__tp_probe)->func); \
171 tp_rcu_read_unlock_bp(); \
173 static inline lttng_ust_notrace \
174 void __tracepoint_register_##_provider##___##_name(char *name, \
175 void (*func)(void), void *data); \
177 void __tracepoint_register_##_provider##___##_name(char *name, \
178 void (*func)(void), void *data) \
180 __tracepoint_probe_register(name, func, data, \
181 __tracepoint_##_provider##___##_name.signature); \
183 static inline lttng_ust_notrace \
184 void __tracepoint_unregister_##_provider##___##_name(char *name, \
185 void (*func)(void), void *data); \
187 void __tracepoint_unregister_##_provider##___##_name(char *name, \
188 void (*func)(void), void *data) \
190 __tracepoint_probe_unregister(name, func, data); \
193 extern int __tracepoint_probe_register(const char *name
, void (*func
)(void),
194 void *data
, const char *signature
);
195 extern int __tracepoint_probe_unregister(const char *name
, void (*func
)(void),
199 * tracepoint dynamic linkage handling (callbacks). Hidden visibility:
200 * shared across objects in a module/main executable.
202 struct tracepoint_dlopen
{
203 void *liblttngust_handle
;
205 int (*tracepoint_register_lib
)(struct tracepoint
* const *tracepoints_start
,
206 int tracepoints_count
);
207 int (*tracepoint_unregister_lib
)(struct tracepoint
* const *tracepoints_start
);
209 void (*rcu_read_lock_sym_bp
)(void);
210 void (*rcu_read_unlock_sym_bp
)(void);
211 void *(*rcu_dereference_sym_bp
)(void *p
);
215 extern struct tracepoint_dlopen tracepoint_dlopen
;
217 #if defined(TRACEPOINT_DEFINE) || defined(TRACEPOINT_CREATE_PROBES)
220 * These weak symbols, the constructor, and destructor take care of
221 * registering only _one_ instance of the tracepoints per shared-ojbect
222 * (or for the whole main program).
224 int __tracepoint_registered
225 __attribute__((weak
, visibility("hidden")));
226 int __tracepoint_ptrs_registered
227 __attribute__((weak
, visibility("hidden")));
228 struct tracepoint_dlopen tracepoint_dlopen
229 __attribute__((weak
, visibility("hidden")));
232 static inline void lttng_ust_notrace
233 __tracepoint__init_urcu_sym(void);
235 __tracepoint__init_urcu_sym(void)
238 * Symbols below are needed by tracepoint call sites and probe
241 if (!tracepoint_dlopen
.rcu_read_lock_sym_bp
)
242 tracepoint_dlopen
.rcu_read_lock_sym_bp
=
243 URCU_FORCE_CAST(void (*)(void),
244 dlsym(tracepoint_dlopen
.liblttngust_handle
,
245 "tp_rcu_read_lock_bp"));
246 if (!tracepoint_dlopen
.rcu_read_unlock_sym_bp
)
247 tracepoint_dlopen
.rcu_read_unlock_sym_bp
=
248 URCU_FORCE_CAST(void (*)(void),
249 dlsym(tracepoint_dlopen
.liblttngust_handle
,
250 "tp_rcu_read_unlock_bp"));
251 if (!tracepoint_dlopen
.rcu_dereference_sym_bp
)
252 tracepoint_dlopen
.rcu_dereference_sym_bp
=
253 URCU_FORCE_CAST(void *(*)(void *p
),
254 dlsym(tracepoint_dlopen
.liblttngust_handle
,
255 "tp_rcu_dereference_sym_bp"));
258 static inline void lttng_ust_notrace
259 __tracepoint__init_urcu_sym(void);
261 __tracepoint__init_urcu_sym(void)
266 static void lttng_ust_notrace
__attribute__((constructor
))
267 __tracepoints__init(void);
269 __tracepoints__init(void)
271 if (__tracepoint_registered
++)
274 if (!tracepoint_dlopen
.liblttngust_handle
)
275 tracepoint_dlopen
.liblttngust_handle
=
276 dlopen("liblttng-ust-tracepoint.so.0", RTLD_NOW
| RTLD_GLOBAL
);
277 if (!tracepoint_dlopen
.liblttngust_handle
)
279 __tracepoint__init_urcu_sym();
282 static void lttng_ust_notrace
__attribute__((destructor
))
283 __tracepoints__destroy(void);
285 __tracepoints__destroy(void)
289 if (--__tracepoint_registered
)
291 if (tracepoint_dlopen
.liblttngust_handle
&& !__tracepoint_ptrs_registered
) {
292 ret
= dlclose(tracepoint_dlopen
.liblttngust_handle
);
294 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
297 memset(&tracepoint_dlopen
, 0, sizeof(tracepoint_dlopen
));
303 #ifdef TRACEPOINT_DEFINE
306 * These weak symbols, the constructor, and destructor take care of
307 * registering only _one_ instance of the tracepoints per shared-ojbect
308 * (or for the whole main program).
310 extern struct tracepoint
* const __start___tracepoints_ptrs
[]
311 __attribute__((weak
, visibility("hidden")));
312 extern struct tracepoint
* const __stop___tracepoints_ptrs
[]
313 __attribute__((weak
, visibility("hidden")));
316 * When TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a
317 * unresolved symbol that requires the provider to be linked in. When
318 * TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an
319 * unresolved symbol that depends on having the provider linked in,
320 * otherwise the linker complains. This deals with use of static
321 * libraries, ensuring that the linker does not remove the provider
322 * object from the executable.
324 #ifdef TRACEPOINT_PROBE_DYNAMIC_LINKAGE
325 #define _TRACEPOINT_UNDEFINED_REF(provider) NULL
326 #else /* TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
327 #define _TRACEPOINT_UNDEFINED_REF(provider) &__tracepoint_provider_##provider
328 #endif /* TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
331 * Note: to allow PIC code, we need to allow the linker to update the pointers
332 * in the __tracepoints_ptrs section.
333 * Therefore, this section is _not_ const (read-only).
335 #define _TP_EXTRACT_STRING(...) #__VA_ARGS__
337 #define _DEFINE_TRACEPOINT(_provider, _name, _args) \
338 extern int __tracepoint_provider_##_provider; \
339 static const char __tp_strtab_##_provider##___##_name[] \
340 __attribute__((section("__tracepoints_strings"))) = \
341 #_provider ":" #_name; \
342 struct tracepoint __tracepoint_##_provider##___##_name \
343 __attribute__((section("__tracepoints"))) = \
345 __tp_strtab_##_provider##___##_name, \
348 _TRACEPOINT_UNDEFINED_REF(_provider), \
349 _TP_EXTRACT_STRING(_args), \
351 static struct tracepoint * __tracepoint_ptr_##_provider##___##_name \
352 __attribute__((used, section("__tracepoints_ptrs"))) = \
353 &__tracepoint_##_provider##___##_name;
355 static void lttng_ust_notrace
__attribute__((constructor
))
356 __tracepoints__ptrs_init(void);
358 __tracepoints__ptrs_init(void)
360 if (__tracepoint_ptrs_registered
++)
362 if (!tracepoint_dlopen
.liblttngust_handle
)
363 tracepoint_dlopen
.liblttngust_handle
=
364 dlopen("liblttng-ust-tracepoint.so.0", RTLD_NOW
| RTLD_GLOBAL
);
365 if (!tracepoint_dlopen
.liblttngust_handle
)
367 tracepoint_dlopen
.tracepoint_register_lib
=
368 URCU_FORCE_CAST(int (*)(struct tracepoint
* const *, int),
369 dlsym(tracepoint_dlopen
.liblttngust_handle
,
370 "tracepoint_register_lib"));
371 tracepoint_dlopen
.tracepoint_unregister_lib
=
372 URCU_FORCE_CAST(int (*)(struct tracepoint
* const *),
373 dlsym(tracepoint_dlopen
.liblttngust_handle
,
374 "tracepoint_unregister_lib"));
375 __tracepoint__init_urcu_sym();
376 if (tracepoint_dlopen
.tracepoint_register_lib
) {
377 tracepoint_dlopen
.tracepoint_register_lib(__start___tracepoints_ptrs
,
378 __stop___tracepoints_ptrs
-
379 __start___tracepoints_ptrs
);
383 static void lttng_ust_notrace
__attribute__((destructor
))
384 __tracepoints__ptrs_destroy(void);
386 __tracepoints__ptrs_destroy(void)
390 if (--__tracepoint_ptrs_registered
)
392 if (tracepoint_dlopen
.tracepoint_unregister_lib
)
393 tracepoint_dlopen
.tracepoint_unregister_lib(__start___tracepoints_ptrs
);
394 if (tracepoint_dlopen
.liblttngust_handle
&& !__tracepoint_registered
) {
395 ret
= dlclose(tracepoint_dlopen
.liblttngust_handle
);
397 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
400 memset(&tracepoint_dlopen
, 0, sizeof(tracepoint_dlopen
));
404 #else /* TRACEPOINT_DEFINE */
406 #define _DEFINE_TRACEPOINT(_provider, _name, _args)
408 #endif /* #else TRACEPOINT_DEFINE */
414 #endif /* _LTTNG_TRACEPOINT_H */
416 /* The following declarations must be outside re-inclusion protection. */
418 #ifndef TRACEPOINT_EVENT
421 * How to use the TRACEPOINT_EVENT macro:
425 * TRACEPOINT_EVENT(someproject_component, event_name,
427 * * TP_ARGS takes from 0 to 10 "type, field_name" pairs *
429 * TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen,
430 * long *, arg4, size_t, arg4_len),
432 * * TP_FIELDS describes the event payload layout in the trace *
435 * * Integer, printed in base 10 *
436 * ctf_integer(int, field_a, arg0)
438 * * Integer, printed with 0x base 16 *
439 * ctf_integer_hex(unsigned long, field_d, arg1)
441 * * Array Sequence, printed as UTF8-encoded array of bytes *
442 * ctf_array_text(char, field_b, string, FIXED_LEN)
443 * ctf_sequence_text(char, field_c, string, size_t, strlen)
445 * * String, printed as UTF8-encoded string *
446 * ctf_string(field_e, string)
448 * * Array sequence of signed integer values *
449 * ctf_array(long, field_f, arg4, FIXED_LEN4)
450 * ctf_sequence(long, field_g, arg4, size_t, arg4_len)
454 * More detailed explanation:
456 * The name of the tracepoint is expressed as a tuple with the provider
457 * and name arguments.
459 * The provider and name should be a proper C99 identifier.
460 * The "provider" and "name" MUST follow these rules to ensure no
461 * namespace clash occurs:
463 * For projects (applications and libraries) for which an entity
464 * specific to the project controls the source code and thus its
465 * tracepoints (typically with a scope larger than a single company):
468 * project_component, event
472 * Where "project" is the name of the project,
473 * "component" is the name of the project component (which may
474 * include several levels of sub-components, e.g.
475 * ...component_subcomponent_...) where the tracepoint is located
477 * "event" is the name of the tracepoint event.
479 * For projects issued from a single company wishing to advertise that
480 * the company controls the source code and thus the tracepoints, the
481 * "com_" prefix should be used:
484 * com_company_project_component, event
486 * com_company_project, event
488 * Where "company" is the name of the company,
489 * "project" is the name of the project,
490 * "component" is the name of the project component (which may
491 * include several levels of sub-components, e.g.
492 * ...component_subcomponent_...) where the tracepoint is located
494 * "event" is the name of the tracepoint event.
496 * the provider:event identifier is limited to 127 characters.
499 #define TRACEPOINT_EVENT(provider, name, args, fields) \
500 _DECLARE_TRACEPOINT(provider, name, _TP_PARAMS(args)) \
501 _DEFINE_TRACEPOINT(provider, name, _TP_PARAMS(args))
503 #define TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
505 #define TRACEPOINT_EVENT_INSTANCE(provider, _template, name, args) \
506 _DECLARE_TRACEPOINT(provider, name, _TP_PARAMS(args)) \
507 _DEFINE_TRACEPOINT(provider, name, _TP_PARAMS(args))
509 #endif /* #ifndef TRACEPOINT_EVENT */
511 #ifndef TRACEPOINT_LOGLEVEL
514 * Tracepoint Loglevels
516 * Typical use of these loglevels:
518 * The loglevels go from 0 to 14. Higher numbers imply the most
519 * verbosity (higher event throughput expected.
521 * Loglevels 0 through 6, and loglevel 14, match syslog(3) loglevels
522 * semantic. Loglevels 7 through 13 offer more fine-grained selection of
529 * action must be taken immediately
532 * critical conditions
541 * normal, but significant, condition
544 * informational message
546 * TRACE_DEBUG_SYSTEM 7
547 * debug information with system-level scope (set of programs)
549 * TRACE_DEBUG_PROGRAM 8
550 * debug information with program-level scope (set of processes)
552 * TRACE_DEBUG_PROCESS 9
553 * debug information with process-level scope (set of modules)
555 * TRACE_DEBUG_MODULE 10
556 * debug information with module (executable/library) scope (set of units)
558 * TRACE_DEBUG_UNIT 11
559 * debug information with compilation unit scope (set of functions)
561 * TRACE_DEBUG_FUNCTION 12
562 * debug information with function-level scope
564 * TRACE_DEBUG_LINE 13
565 * debug information with line-level scope (TRACEPOINT_EVENT default)
568 * debug-level message (trace_printf default)
570 * Declare tracepoint loglevels for tracepoints. A TRACEPOINT_EVENT
571 * should be declared prior to the the TRACEPOINT_LOGLEVEL for a given
572 * tracepoint name. The first field is the provider name, the second
573 * field is the name of the tracepoint, the third field is the loglevel
576 * TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >,
579 * The TRACEPOINT_PROVIDER must be already declared before declaring a
580 * TRACEPOINT_LOGLEVEL.
591 TRACE_DEBUG_SYSTEM
= 7,
592 TRACE_DEBUG_PROGRAM
= 8,
593 TRACE_DEBUG_PROCESS
= 9,
594 TRACE_DEBUG_MODULE
= 10,
595 TRACE_DEBUG_UNIT
= 11,
596 TRACE_DEBUG_FUNCTION
= 12,
597 TRACE_DEBUG_LINE
= 13,
601 #define TRACEPOINT_LOGLEVEL(provider, name, loglevel)
603 #endif /* #ifndef TRACEPOINT_LOGLEVEL */
605 #ifndef TRACEPOINT_MODEL_EMF_URI
607 #define TRACEPOINT_MODEL_EMF_URI(provider, name, uri)
609 #endif /* #ifndef TRACEPOINT_MODEL_EMF_URI */