2 * SPDX-License-Identifier: MIT
4 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 #ifndef _LTTNG_UST_TRACEPOINT_H
8 #define _LTTNG_UST_TRACEPOINT_H
12 #include <lttng/tracepoint-types.h>
13 #include <lttng/tracepoint-rcu.h>
14 #include <lttng/ust-utils.h>
15 #include <sys/types.h>
18 #include <urcu/compiler.h>
19 #include <urcu/system.h>
20 #include <dlfcn.h> /* for dlopen */
21 #include <string.h> /* for memset */
24 #include <lttng/ust-config.h> /* for sdt */
25 #include <lttng/ust-compiler.h>
26 #include <lttng/ust-tracer.h>
27 #include <lttng/ust-api-compat.h>
29 #define LTTNG_UST_TRACEPOINT_NAME_LEN_MAX 256
31 #ifdef LTTNG_UST_HAVE_SDT_INTEGRATION
33 * Instead of using SDT_USE_VARIADIC from 'sys/sdt.h', use our own namespaced
34 * macros since the instrumented application might already have included
35 * 'sys/sdt.h' without variadic support.
39 #define LTTNG_UST__SDT_NARG(...) \
40 LTTNG_UST___SDT_NARG(__VA_ARGS__, 12,11,10,9,8,7,6,5,4,3,2,1,0)
42 #define LTTNG_UST___SDT_NARG(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12, N, ...) N
44 #define LTTNG_UST__SDT_PROBE_N(provider, name, N, ...) \
45 _SDT_PROBE(provider, name, N, (__VA_ARGS__))
47 #define LTTNG_UST_STAP_PROBEV(provider, name, ...) \
48 LTTNG_UST__SDT_PROBE_N(provider, name, LTTNG_UST__SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__)
51 #define LTTNG_UST_STAP_PROBEV(...)
58 #define lttng_ust_tracepoint_enabled(provider, name) \
59 caa_unlikely(CMM_LOAD_SHARED(lttng_ust_tracepoint_##provider##___##name.state))
61 #define lttng_ust_do_tracepoint(provider, name, ...) \
62 lttng_ust_tracepoint_cb_##provider##___##name(__VA_ARGS__)
64 #define lttng_ust_tracepoint(provider, name, ...) \
66 LTTNG_UST_STAP_PROBEV(provider, name, ## __VA_ARGS__); \
67 if (lttng_ust_tracepoint_enabled(provider, name)) \
68 lttng_ust_do_tracepoint(provider, name, __VA_ARGS__); \
71 #define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
74 * LTTNG_UST_TP_ARGS takes tuples of type, argument separated by a comma.
75 * It can take up to 10 tuples (which means that less than 10 tuples is
77 * Each tuple is also separated by a comma.
79 #define LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb) \
81 #define LTTNG_UST__TP_COMBINE_TOKENS(_tokena, _tokenb) \
82 LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb)
83 #define LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
84 _tokena##_tokenb##_tokenc
85 #define LTTNG_UST__TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
86 LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc)
87 #define LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
88 _tokena##_tokenb##_tokenc##_tokend
89 #define LTTNG_UST__TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
90 LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend)
93 * LTTNG_UST__TP_EXVAR* extract the var names.
94 * LTTNG_UST__TP_EXVAR1 and LTTNG_UST__TP_EXDATA_VAR1 are needed for -std=c99.
96 #define LTTNG_UST__TP_EXVAR0()
97 #define LTTNG_UST__TP_EXVAR1(a)
98 #define LTTNG_UST__TP_EXVAR2(a,b) b
99 #define LTTNG_UST__TP_EXVAR4(a,b,c,d) b,d
100 #define LTTNG_UST__TP_EXVAR6(a,b,c,d,e,f) b,d,f
101 #define LTTNG_UST__TP_EXVAR8(a,b,c,d,e,f,g,h) b,d,f,h
102 #define LTTNG_UST__TP_EXVAR10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j
103 #define LTTNG_UST__TP_EXVAR12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l
104 #define LTTNG_UST__TP_EXVAR14(a,b,c,d,e,f,g,h,i,j,k,l,m,n) b,d,f,h,j,l,n
105 #define LTTNG_UST__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
106 #define LTTNG_UST__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
107 #define LTTNG_UST__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
109 #define LTTNG_UST__TP_EXDATA_VAR0() __tp_data
110 #define LTTNG_UST__TP_EXDATA_VAR1(a) __tp_data
111 #define LTTNG_UST__TP_EXDATA_VAR2(a,b) __tp_data,b
112 #define LTTNG_UST__TP_EXDATA_VAR4(a,b,c,d) __tp_data,b,d
113 #define LTTNG_UST__TP_EXDATA_VAR6(a,b,c,d,e,f) __tp_data,b,d,f
114 #define LTTNG_UST__TP_EXDATA_VAR8(a,b,c,d,e,f,g,h) __tp_data,b,d,f,h
115 #define LTTNG_UST__TP_EXDATA_VAR10(a,b,c,d,e,f,g,h,i,j) __tp_data,b,d,f,h,j
116 #define LTTNG_UST__TP_EXDATA_VAR12(a,b,c,d,e,f,g,h,i,j,k,l) __tp_data,b,d,f,h,j,l
117 #define LTTNG_UST__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
118 #define LTTNG_UST__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
119 #define LTTNG_UST__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
120 #define LTTNG_UST__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
123 * LTTNG_UST__TP_EXPROTO* extract tuples of type, var.
124 * LTTNG_UST__TP_EXPROTO1 and LTTNG_UST__TP_EXDATA_PROTO1 are needed for -std=c99.
126 #define LTTNG_UST__TP_EXPROTO0() void
127 #define LTTNG_UST__TP_EXPROTO1(a) void
128 #define LTTNG_UST__TP_EXPROTO2(a,b) a b
129 #define LTTNG_UST__TP_EXPROTO4(a,b,c,d) a b,c d
130 #define LTTNG_UST__TP_EXPROTO6(a,b,c,d,e,f) a b,c d,e f
131 #define LTTNG_UST__TP_EXPROTO8(a,b,c,d,e,f,g,h) a b,c d,e f,g h
132 #define LTTNG_UST__TP_EXPROTO10(a,b,c,d,e,f,g,h,i,j) a b,c d,e f,g h,i j
133 #define LTTNG_UST__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
134 #define LTTNG_UST__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
135 #define LTTNG_UST__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
136 #define LTTNG_UST__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
137 #define LTTNG_UST__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
139 #define LTTNG_UST__TP_EXDATA_PROTO0() void *__tp_data
140 #define LTTNG_UST__TP_EXDATA_PROTO1(a) void *__tp_data
141 #define LTTNG_UST__TP_EXDATA_PROTO2(a,b) void *__tp_data,a b
142 #define LTTNG_UST__TP_EXDATA_PROTO4(a,b,c,d) void *__tp_data,a b,c d
143 #define LTTNG_UST__TP_EXDATA_PROTO6(a,b,c,d,e,f) void *__tp_data,a b,c d,e f
144 #define LTTNG_UST__TP_EXDATA_PROTO8(a,b,c,d,e,f,g,h) void *__tp_data,a b,c d,e f,g h
145 #define LTTNG_UST__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
146 #define LTTNG_UST__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
147 #define LTTNG_UST__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
148 #define LTTNG_UST__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
149 #define LTTNG_UST__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
150 #define LTTNG_UST__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
152 /* Preprocessor trick to count arguments. Inspired from sdt.h. */
153 #define LTTNG_UST__TP_NARGS(...) LTTNG_UST___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)
154 #define LTTNG_UST___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
155 #define LTTNG_UST__TP_PROTO_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXPROTO, N)(__VA_ARGS__))
156 #define LTTNG_UST__TP_VAR_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXVAR, N)(__VA_ARGS__))
157 #define LTTNG_UST__TP_DATA_PROTO_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXDATA_PROTO, N)(__VA_ARGS__))
158 #define LTTNG_UST__TP_DATA_VAR_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXDATA_VAR, N)(__VA_ARGS__))
159 #define LTTNG_UST__TP_ARGS_PROTO(...) LTTNG_UST__TP_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
160 #define LTTNG_UST__TP_ARGS_VAR(...) LTTNG_UST__TP_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
161 #define LTTNG_UST__TP_ARGS_DATA_PROTO(...) LTTNG_UST__TP_DATA_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
162 #define LTTNG_UST__TP_ARGS_DATA_VAR(...) LTTNG_UST__TP_DATA_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
163 #define LTTNG_UST__TP_PARAMS(...) __VA_ARGS__
166 * sizeof(#_provider) - 1 : length of the provider string (excluding \0).
167 * sizeof(#_name) - 1 : length of the name string (excluding \0).
168 * + 1 : separator between provider and event name.
170 * Upper bound (inclusive) is LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1 to
174 * left hand side: sizeof(#_provider) - 1 + sizeof(#_name) - 1 + 1
175 * right hand side: LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1
176 * operator: <= (inclusive)
177 * Simplified in the code below.
179 #define lttng_ust_tracepoint_validate_name_len(_provider, _name) \
180 lttng_ust_static_assert(sizeof(#_provider) + sizeof(#_name) <= LTTNG_UST_TRACEPOINT_NAME_LEN_MAX, \
181 "Tracepoint name length is too long", \
182 Tracepoint_name_length_is_too_long)
185 * The tracepoint cb is marked always inline so we can distinguish
186 * between caller's ip addresses within the probe using the return
189 #define LTTNG_UST__DECLARE_TRACEPOINT(_provider, _name, ...) \
190 extern struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \
191 LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY; \
193 void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \
194 __attribute__((always_inline, unused)) lttng_ust_notrace; \
196 void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \
198 struct lttng_ust_tracepoint_probe *__tp_probe; \
200 if (caa_unlikely(!LTTNG_UST_TP_RCU_LINK_TEST())) \
202 lttng_ust_tp_rcu_read_lock(); \
203 __tp_probe = lttng_ust_tp_rcu_dereference(lttng_ust_tracepoint_##_provider##___##_name.probes); \
204 if (caa_unlikely(!__tp_probe)) \
207 void (*__tp_cb)(void) = __tp_probe->func; \
208 void *__tp_data = __tp_probe->data; \
210 URCU_FORCE_CAST(void (*)(LTTNG_UST__TP_ARGS_DATA_PROTO(__VA_ARGS__)), __tp_cb) \
211 (LTTNG_UST__TP_ARGS_DATA_VAR(__VA_ARGS__)); \
212 } while ((++__tp_probe)->func); \
214 lttng_ust_tp_rcu_read_unlock(); \
217 void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \
218 void (*func)(void), void *data) \
221 void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \
222 void (*func)(void), void *data) \
224 lttng_ust_tracepoint_provider_register(provider_name, event_name, func, data, \
225 lttng_ust_tracepoint_##_provider##___##_name.signature); \
228 void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \
229 void (*func)(void), void *data) \
232 void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \
233 void (*func)(void), void *data) \
235 lttng_ust_tracepoint_provider_unregister(provider_name, event_name, func, data); \
239 * Registration of tracepoint provider probe functions with
240 * lttng_ust_tracepoint_provider_register, unregistration with
241 * lttng_ust_tracepoint_provider_unregister.
243 int lttng_ust_tracepoint_provider_register(const char *provider_name
, const char *event_name
,
244 void (*func
)(void), void *data
, const char *signature
);
245 int lttng_ust_tracepoint_provider_unregister(const char *provider_name
, const char *event_name
,
246 void (*func
)(void), void *data
);
249 * Registration of tracepoint instrumentation modules with lttng_ust_tracepoint_module_register,
250 * unregistration with lttng_ust_tracepoint_module_unregister.
252 int lttng_ust_tracepoint_module_register(struct lttng_ust_tracepoint
* const *tracepoints_start
,
253 int tracepoints_count
);
254 int lttng_ust_tracepoint_module_unregister(struct lttng_ust_tracepoint
* const *tracepoints_start
);
257 * tracepoint dynamic linkage handling (callbacks). Hidden visibility:
258 * shared across objects in a module/main executable.
260 * IMPORTANT: this structure is part of the ABI between instrumented
261 * applications and UST. Fields need to be only added at the end, never
262 * reordered, never removed.
264 * The field @struct_size should be used to determine the size of the
265 * structure. It should be queried before using additional fields added
266 * at the end of the structure.
268 struct lttng_ust_tracepoint_dlopen
{
269 uint32_t struct_size
;
271 void *liblttngust_handle
;
273 int (*lttng_ust_tracepoint_module_register
)(struct lttng_ust_tracepoint
* const *tracepoints_start
,
274 int tracepoints_count
);
275 int (*lttng_ust_tracepoint_module_unregister
)(struct lttng_ust_tracepoint
* const *tracepoints_start
);
276 void (*rcu_read_lock_sym
)(void);
277 void (*rcu_read_unlock_sym
)(void);
278 void *(*rcu_dereference_sym
)(void *p
);
280 /* End of base ABI. Fields below should be used after checking struct_size. */
283 extern struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen
;
284 extern struct lttng_ust_tracepoint_dlopen
*lttng_ust_tracepoint_dlopen_ptr
;
287 * These weak symbols, the constructor, and destructor take care of
288 * registering only _one_ instance of the tracepoints per shared-ojbect
289 * (or for the whole main program).
291 int lttng_ust_tracepoint_registered
292 __attribute__((weak
, visibility("hidden")));
293 int lttng_ust_tracepoint_ptrs_registered
294 __attribute__((weak
, visibility("hidden")));
295 struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen
296 __attribute__((weak
, visibility("hidden"))) = {
297 .struct_size
= sizeof(struct lttng_ust_tracepoint_dlopen
),
300 * Deal with gcc O1 optimisation issues with weak hidden symbols. gcc
301 * 4.8 and prior does not have the same behavior for symbol scoping on
302 * 32-bit powerpc depending on the object size: symbols for objects of 8
303 * bytes or less have the same address throughout a module, whereas they
304 * have different addresses between compile units for objects larger
305 * than 8 bytes. Add this pointer indirection to ensure that the symbol
306 * scoping match that of the other weak hidden symbols found in this
309 struct lttng_ust_tracepoint_dlopen
*lttng_ust_tracepoint_dlopen_ptr
310 __attribute__((weak
, visibility("hidden")));
313 * Tracepoint dynamic linkage handling (callbacks). Hidden visibility: shared
314 * across objects in a module/main executable. The callbacks are used to
315 * control and check if the destructors should be executed.
317 * IMPORTANT: this structure is part of the ABI between instrumented
318 * applications and UST. Fields need to be only added at the end, never
319 * reordered, never removed.
321 * The field @struct_size should be used to determine the size of the
322 * structure. It should be queried before using additional fields added
323 * at the end of the structure.
325 struct lttng_ust_tracepoint_destructors_syms
{
326 uint32_t struct_size
;
328 void (*tracepoint_disable_destructors
)(void);
329 int (*tracepoint_get_destructors_state
)(void);
331 /* End of base ABI. Fields below should be used after checking struct_size. */
334 extern struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms
;
335 extern struct lttng_ust_tracepoint_destructors_syms
*lttng_ust_tracepoint_destructors_syms_ptr
;
337 struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms
338 __attribute__((weak
, visibility("hidden"))) = {
339 .struct_size
= sizeof(struct lttng_ust_tracepoint_destructors_syms
),
341 struct lttng_ust_tracepoint_destructors_syms
*lttng_ust_tracepoint_destructors_syms_ptr
342 __attribute__((weak
, visibility("hidden")));
344 static inline void tracepoint_disable_destructors(void)
346 if (!lttng_ust_tracepoint_dlopen_ptr
)
347 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
348 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
349 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
350 if (lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
351 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors
)
352 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors();
357 lttng_ust_tracepoint__init_urcu_sym(void)
360 lttng_ust_tracepoint__init_urcu_sym(void)
362 if (!lttng_ust_tracepoint_dlopen_ptr
)
363 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
365 * Symbols below are needed by tracepoint call sites and probe
368 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_read_lock_sym
)
369 lttng_ust_tracepoint_dlopen_ptr
->rcu_read_lock_sym
=
370 URCU_FORCE_CAST(void (*)(void),
371 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
372 "lttng_ust_tp_rcu_read_lock"));
373 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_read_unlock_sym
)
374 lttng_ust_tracepoint_dlopen_ptr
->rcu_read_unlock_sym
=
375 URCU_FORCE_CAST(void (*)(void),
376 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
377 "lttng_ust_tp_rcu_read_unlock"));
378 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_dereference_sym
)
379 lttng_ust_tracepoint_dlopen_ptr
->rcu_dereference_sym
=
380 URCU_FORCE_CAST(void *(*)(void *p
),
381 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
382 "lttng_ust_tp_rcu_dereference_sym"));
386 lttng_ust_tracepoint__init_urcu_sym(void)
389 lttng_ust_tracepoint__init_urcu_sym(void)
395 * Use getenv() directly and bypass lttng-ust helper functions
396 * because we may not have access to lttng-ust shared libraries.
398 #ifdef LTTNG_UST_DEBUG
400 bool lttng_ust_tracepoint_logging_debug_enabled(void)
404 #else /* #ifdef LTTNG_UST_DEBUG */
406 bool lttng_ust_tracepoint_logging_debug_enabled(void)
408 return getenv("LTTNG_UST_DEBUG");
410 #endif /* #ifdef LTTNG_UST_DEBUG */
412 #define LTTNG_UST_TRACEPOINT_THIS_IP \
413 ({ __label__ here; here: &&here; })
416 lttng_ust_tracepoints_print_disabled_message(void)
418 if (!lttng_ust_tracepoint_logging_debug_enabled())
420 fprintf(stderr
, "lttng-ust-tracepoint [%ld]: dlopen() failed to find '%s', tracepoints in this binary won't be registered. "
421 "(at addr=%p in %s() at " __FILE__
":" lttng_ust_stringify(__LINE__
) ")\n",
423 LTTNG_UST_TRACEPOINT_LIB_SONAME
,
424 LTTNG_UST_TRACEPOINT_THIS_IP
,
429 lttng_ust__tracepoints__init(void)
430 lttng_ust_notrace
__attribute__((constructor
));
432 lttng_ust__tracepoints__init(void)
434 if (lttng_ust_tracepoint_registered
++) {
435 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
437 lttng_ust_tracepoint__init_urcu_sym();
441 if (!lttng_ust_tracepoint_dlopen_ptr
)
442 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
443 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
444 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
445 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
446 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
447 lttng_ust_tracepoints_print_disabled_message();
450 lttng_ust_tracepoint__init_urcu_sym();
454 lttng_ust__tracepoints__destroy(void)
455 lttng_ust_notrace
__attribute__((destructor
));
457 lttng_ust__tracepoints__destroy(void)
461 if (--lttng_ust_tracepoint_registered
)
463 if (!lttng_ust_tracepoint_dlopen_ptr
)
464 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
465 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
466 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
467 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
469 if (lttng_ust_tracepoint_ptrs_registered
)
472 * Lookup if destructors must be executed using the new method.
474 if (lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
475 && !lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()) {
477 * The tracepoint_get_destructors_state symbol was found with
478 * dlsym but its returned value is 0 meaning that destructors
479 * must not be executed.
483 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
485 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
488 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
491 #if LTTNG_UST_COMPAT_API(0)
492 # if defined(TRACEPOINT_DEFINE) && !defined(LTTNG_UST_TRACEPOINT_DEFINE)
493 # define LTTNG_UST_TRACEPOINT_DEFINE
495 #endif /* #if LTTNG_UST_COMPAT_API(0) */
497 #ifdef LTTNG_UST_TRACEPOINT_DEFINE
500 * These weak symbols, the constructor, and destructor take care of
501 * registering only _one_ instance of the tracepoints per shared-ojbect
502 * (or for the whole main program).
504 extern struct lttng_ust_tracepoint
* const __start_lttng_ust_tracepoints_ptrs
[]
505 __attribute__((weak
, visibility("hidden")));
506 extern struct lttng_ust_tracepoint
* const __stop_lttng_ust_tracepoints_ptrs
[]
507 __attribute__((weak
, visibility("hidden")));
510 * When LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a
511 * unresolved symbol that requires the provider to be linked in. When
512 * LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an
513 * unresolved symbol that depends on having the provider linked in,
514 * otherwise the linker complains. This deals with use of static
515 * libraries, ensuring that the linker does not remove the provider
516 * object from the executable.
519 #if LTTNG_UST_COMPAT_API(0)
520 # if defined(TRACEPOINT_PROBE_DYNAMIC_LINKAGE) && !defined(LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE)
521 # define LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
523 #endif /* #if LTTNG_UST_COMPAT_API(0) */
525 #ifdef LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
526 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) NULL
527 #else /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
528 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) <tng_ust_tracepoint_provider_##provider
529 #endif /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
532 * Note: to allow PIC code, we need to allow the linker to update the pointers
533 * in the lttng_ust_tracepoints_ptrs section.
534 * Therefore, this section is _not_ const (read-only).
536 #define LTTNG_UST__TP_EXTRACT_STRING(...) #__VA_ARGS__
538 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args) \
539 lttng_ust_tracepoint_validate_name_len(_provider, _name); \
540 extern int lttng_ust_tracepoint_provider_##_provider \
541 LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY; \
542 static const char lttng_ust_tp_provider_strtab_##_provider##___##_name[] \
543 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
545 static const char lttng_ust_tp_name_strtab_##_provider##___##_name[] \
546 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
548 struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \
549 __attribute__((section("lttng_ust_tracepoints"))) \
550 LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY = { \
551 sizeof(struct lttng_ust_tracepoint), \
552 lttng_ust_tp_provider_strtab_##_provider##___##_name, \
553 lttng_ust_tp_name_strtab_##_provider##___##_name, \
556 LTTNG_UST__TRACEPOINT_UNDEFINED_REF(_provider), \
557 LTTNG_UST__TP_EXTRACT_STRING(_args), \
559 static struct lttng_ust_tracepoint * \
560 lttng_ust_tracepoint_ptr_##_provider##___##_name \
561 __attribute__((section("lttng_ust_tracepoints_ptrs"), used)) \
562 __lttng_ust_variable_attribute_no_sanitize_address = \
563 <tng_ust_tracepoint_##_provider##___##_name;
566 lttng_ust__tracepoints__ptrs_init(void)
567 lttng_ust_notrace
__attribute__((constructor
));
569 lttng_ust__tracepoints__ptrs_init(void)
571 if (lttng_ust_tracepoint_ptrs_registered
++)
573 if (!lttng_ust_tracepoint_dlopen_ptr
)
574 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
575 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
576 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
577 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
578 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
579 lttng_ust_tracepoints_print_disabled_message();
582 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
583 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
584 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
=
585 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *, int),
586 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
587 "lttng_ust_tracepoint_module_register"));
588 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
=
589 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *),
590 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
591 "lttng_ust_tracepoint_module_unregister"));
592 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors
=
593 URCU_FORCE_CAST(void (*)(void),
594 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
595 "lttng_ust_tp_disable_destructors"));
596 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
=
597 URCU_FORCE_CAST(int (*)(void),
598 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
599 "lttng_ust_tp_get_destructors_state"));
600 lttng_ust_tracepoint__init_urcu_sym();
601 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
) {
602 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register(__start_lttng_ust_tracepoints_ptrs
,
603 __stop_lttng_ust_tracepoints_ptrs
-
604 __start_lttng_ust_tracepoints_ptrs
);
609 lttng_ust__tracepoints__ptrs_destroy(void)
610 lttng_ust_notrace
__attribute__((destructor
));
612 lttng_ust__tracepoints__ptrs_destroy(void)
616 if (--lttng_ust_tracepoint_ptrs_registered
)
618 if (!lttng_ust_tracepoint_dlopen_ptr
)
619 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
620 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
621 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
622 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
)
623 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister(__start_lttng_ust_tracepoints_ptrs
);
624 if (lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
625 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
626 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()
627 && !lttng_ust_tracepoint_ptrs_registered
) {
628 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
630 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
633 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
637 #else /* LTTNG_UST_TRACEPOINT_DEFINE */
639 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args)
641 #endif /* #else LTTNG_UST_TRACEPOINT_DEFINE */
643 #if LTTNG_UST_COMPAT_API(0)
644 #define tracepoint lttng_ust_tracepoint
645 #define do_tracepoint lttng_ust_do_tracepoint
646 #define tracepoint_enabled lttng_ust_tracepoint_enabled
647 #define TP_ARGS LTTNG_UST_TP_ARGS
648 #endif /* #if LTTNG_UST_COMPAT_API(0) */
654 #endif /* _LTTNG_UST_TRACEPOINT_H */
656 /* The following declarations must be outside re-inclusion protection. */
659 * LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION: Define this before including
660 * a tracepoint instrumentation header to hide symbols associated with
661 * tracepoint module instrumentation. This is useful if all compile
662 * units using the lttng_ust_tracepoint(),
663 * lttng_ust_tracepoint_enabled() and lttng_ust_do_tracepoint() macros
664 * is within the same module as the compile unit including the
665 * tracepoint header after defining LTTNG_UST_TRACEPOINT_DEFINE.
668 #undef LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY
669 #ifdef LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION
670 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
672 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("default")))
676 * LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION: Define this before
677 * including a tracepoint instrumentation header to hide symbols
678 * associated with the tracepoint provider. This is useful if the
679 * tracepoint definition (including the header after defining
680 * LTTNG_UST_TRACEPOINT_DEFINE) is in the same module as the provider
681 * (including the header after defining
682 * LTTNG_UST_TRACEPOINT_CREATE_PROBES).
684 #undef LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY
685 #ifdef LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
686 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
688 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("default")))
691 #ifndef LTTNG_UST_TRACEPOINT_ENUM
694 * Tracepoint Enumerations
696 * The enumeration is a mapping between an integer, or range of integers, and
697 * a string. It can be used to have a more compact trace in cases where the
698 * possible values for a field are limited:
702 * LTTNG_UST_TRACEPOINT_ENUM(someproject_component, enumname,
703 * LTTNG_UST_TP_ENUM_VALUES(
704 * lttng_ust_field_enum_value("even", 0)
705 * lttng_ust_field_enum_value("uneven", 1)
706 * lttng_ust_field_enum_range("twoto4", 2, 4)
707 * lttng_ust_field_enum_value("five", 5)
711 * Where "someproject_component" is the name of the component this enumeration
712 * belongs to and "enumname" identifies this enumeration. Inside the
713 * LTTNG_UST_TP_ENUM_VALUES macro is the actual mapping. Each string value can map
714 * to either a single value with lttng_ust_field_enum_value or a range of values
715 * with lttng_ust_field_enum_range.
717 * Enumeration ranges may overlap, but the behavior is implementation-defined,
718 * each trace reader will handle overlapping as it wishes.
720 * That enumeration can then be used in a field inside the TP_FIELD macro using
721 * the following line:
723 * lttng_ust_field_enum(someproject_component, enumname, enumtype, enumfield, enumval)
725 * Where "someproject_component" and "enumname" match those in the
726 * LTTNG_UST_TRACEPOINT_ENUM, "enumtype" is a signed or unsigned integer type
727 * backing the enumeration, "enumfield" is the name of the field and
728 * "enumval" is the value.
731 #define LTTNG_UST_TRACEPOINT_ENUM(provider, name, values)
733 #if LTTNG_UST_COMPAT_API(0)
734 #define TRACEPOINT_ENUM LTTNG_UST_TRACEPOINT_ENUM
735 #endif /* #if LTTNG_UST_COMPAT_API(0) */
737 #endif /* #ifndef LTTNG_UST_TRACEPOINT_ENUM */
739 #ifndef LTTNG_UST_TRACEPOINT_EVENT
742 * How to use the LTTNG_UST_TRACEPOINT_EVENT macro:
746 * LTTNG_UST_TRACEPOINT_EVENT(someproject_component, event_name,
748 * * LTTNG_UST_TP_ARGS takes from 0 to 10 "type, field_name" pairs *
750 * LTTNG_UST_TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen,
751 * long *, arg4, size_t, arg4_len),
753 * * LTTNG_UST_TP_FIELDS describes the event payload layout in the trace *
755 * LTTNG_UST_TP_FIELDS(
756 * * Integer, printed in base 10 *
757 * lttng_ust_field_integer(int, field_a, arg0)
759 * * Integer, printed with 0x base 16 *
760 * lttng_ust_field_integer_hex(unsigned long, field_d, arg1)
763 * lttng_ust_field_enum(someproject_component, enum_name, int, field_e, arg0)
765 * * Array Sequence, printed as UTF8-encoded array of bytes *
766 * lttng_ust_field_array_text(char, field_b, string, FIXED_LEN)
767 * lttng_ust_field_sequence_text(char, field_c, string, size_t, strlen)
769 * * String, printed as UTF8-encoded string *
770 * lttng_ust_field_string(field_e, string)
772 * * Array sequence of signed integer values *
773 * lttng_ust_field_array(long, field_f, arg4, FIXED_LEN4)
774 * lttng_ust_field_sequence(long, field_g, arg4, size_t, arg4_len)
778 * More detailed explanation:
780 * The name of the tracepoint is expressed as a tuple with the provider
781 * and name arguments.
783 * The provider and name should be a proper C99 identifier.
784 * The "provider" and "name" MUST follow these rules to ensure no
785 * namespace clash occurs:
787 * For projects (applications and libraries) for which an entity
788 * specific to the project controls the source code and thus its
789 * tracepoints (typically with a scope larger than a single company):
792 * project_component, event
796 * Where "project" is the name of the project,
797 * "component" is the name of the project component (which may
798 * include several levels of sub-components, e.g.
799 * ...component_subcomponent_...) where the tracepoint is located
801 * "event" is the name of the tracepoint event.
803 * For projects issued from a single company wishing to advertise that
804 * the company controls the source code and thus the tracepoints, the
805 * "com_" prefix should be used:
808 * com_company_project_component, event
810 * com_company_project, event
812 * Where "company" is the name of the company,
813 * "project" is the name of the project,
814 * "component" is the name of the project component (which may
815 * include several levels of sub-components, e.g.
816 * ...component_subcomponent_...) where the tracepoint is located
818 * "event" is the name of the tracepoint event.
820 * the provider:event identifier is limited to 127 characters.
823 #define LTTNG_UST_TRACEPOINT_EVENT(provider, name, args, fields) \
824 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
825 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
827 #define LTTNG_UST_TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
829 #define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(template_provider, template_name, provider, name, args) \
830 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
831 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
833 #if LTTNG_UST_COMPAT_API(0)
834 #define TRACEPOINT_EVENT LTTNG_UST_TRACEPOINT_EVENT
835 #define TRACEPOINT_EVENT_CLASS LTTNG_UST_TRACEPOINT_EVENT_CLASS
836 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, args) \
837 LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_provider, _template, \
838 _provider, _name, LTTNG_UST__TP_PARAMS(args))
840 #endif /* #if LTTNG_UST_COMPAT_API(0) */
842 #endif /* #ifndef LTTNG_UST_TRACEPOINT_EVENT */
844 #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL
847 * Tracepoint Loglevels
849 * Typical use of these loglevels:
851 * The loglevels go from 0 to 14. Higher numbers imply the most
852 * verbosity (higher event throughput expected.
854 * Loglevels 0 through 6, and loglevel 14, match syslog(3) loglevels
855 * semantic. Loglevels 7 through 13 offer more fine-grained selection of
858 * LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG 0
861 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT 1
862 * action must be taken immediately
864 * LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT 2
865 * critical conditions
867 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR 3
870 * LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING 4
873 * LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE 5
874 * normal, but significant, condition
876 * LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO 6
877 * informational message
879 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM 7
880 * debug information with system-level scope (set of programs)
882 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM 8
883 * debug information with program-level scope (set of processes)
885 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS 9
886 * debug information with process-level scope (set of modules)
888 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE 10
889 * debug information with module (executable/library) scope (set of units)
891 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT 11
892 * debug information with compilation unit scope (set of functions)
894 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION 12
895 * debug information with function-level scope
897 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE 13
898 * debug information with line-level scope (LTTNG_UST_TRACEPOINT_EVENT default)
900 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG 14
901 * debug-level message
903 * Declare tracepoint loglevels for tracepoints. A LTTNG_UST_TRACEPOINT_EVENT
904 * should be declared prior to the the LTTNG_UST_TRACEPOINT_LOGLEVEL for a given
905 * tracepoint name. The first field is the provider name, the second
906 * field is the name of the tracepoint, the third field is the loglevel
909 * LTTNG_UST_TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >,
912 * The LTTNG_UST_TRACEPOINT_PROVIDER must be already declared before declaring a
913 * LTTNG_UST_TRACEPOINT_LOGLEVEL.
917 LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
= 0,
918 LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
= 1,
919 LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
= 2,
920 LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
= 3,
921 LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
= 4,
922 LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
= 5,
923 LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
= 6,
924 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
= 7,
925 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
= 8,
926 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
= 9,
927 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
= 10,
928 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
= 11,
929 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
= 12,
930 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
= 13,
931 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
= 14,
934 #define LTTNG_UST_TRACEPOINT_LOGLEVEL(provider, name, loglevel)
936 #if LTTNG_UST_COMPAT_API(0)
937 #define TRACEPOINT_LOGLEVEL LTTNG_UST_TRACEPOINT_LOGLEVEL
939 #define TRACE_EMERG LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
940 #define TRACE_ALERT LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
941 #define TRACE_CRIT LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
942 #define TRACE_ERR LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
943 #define TRACE_WARNING LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
944 #define TRACE_NOTICE LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
945 #define TRACE_INFO LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
946 #define TRACE_DEBUG_SYSTEM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
947 #define TRACE_DEBUG_PROGRAM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
948 #define TRACE_DEBUG_PROCESS LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
949 #define TRACE_DEBUG_MODULE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
950 #define TRACE_DEBUG_UNIT LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
951 #define TRACE_DEBUG_FUNCTION LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
952 #define TRACE_DEBUG_LINE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
953 #define TRACE_DEBUG LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
956 #endif /* #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL */
958 #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
960 #define LTTNG_UST_TRACEPOINT_MODEL_EMF_URI(provider, name, uri)
962 #if LTTNG_UST_COMPAT_API(0)
963 #define TRACEPOINT_MODEL_EMF_URI LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
966 #endif /* #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI */