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 #if (defined(__cplusplus) && (__cplusplus <= 199711L))
30 #error "C++11 support is required to build tracepoints and providers as C++"
33 #define LTTNG_UST_TRACEPOINT_NAME_LEN_MAX 256
35 #ifdef LTTNG_UST_HAVE_SDT_INTEGRATION
37 * Instead of using SDT_USE_VARIADIC from 'sys/sdt.h', use our own namespaced
38 * macros since the instrumented application might already have included
39 * 'sys/sdt.h' without variadic support.
43 #define LTTNG_UST__SDT_NARG(...) \
44 LTTNG_UST___SDT_NARG(__VA_ARGS__, 12,11,10,9,8,7,6,5,4,3,2,1,0)
46 #define LTTNG_UST___SDT_NARG(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12, N, ...) N
48 #define LTTNG_UST__SDT_PROBE_N(provider, name, N, ...) \
49 _SDT_PROBE(provider, name, N, (__VA_ARGS__))
51 #define LTTNG_UST_STAP_PROBEV(provider, name, ...) \
52 LTTNG_UST__SDT_PROBE_N(provider, name, LTTNG_UST__SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__)
55 #define LTTNG_UST_STAP_PROBEV(...)
62 #define lttng_ust_tracepoint_enabled(provider, name) \
63 caa_unlikely(CMM_LOAD_SHARED(lttng_ust_tracepoint_##provider##___##name.state))
65 #define lttng_ust_do_tracepoint(provider, name, ...) \
66 lttng_ust_tracepoint_cb_##provider##___##name(__VA_ARGS__)
68 #define lttng_ust_tracepoint(provider, name, ...) \
70 LTTNG_UST_STAP_PROBEV(provider, name, ## __VA_ARGS__); \
71 if (lttng_ust_tracepoint_enabled(provider, name)) \
72 lttng_ust_do_tracepoint(provider, name, __VA_ARGS__); \
75 #define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
78 * LTTNG_UST_TP_ARGS takes tuples of type, argument separated by a comma.
79 * It can take up to 10 tuples (which means that less than 10 tuples is
81 * Each tuple is also separated by a comma.
83 #define LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb) \
85 #define LTTNG_UST__TP_COMBINE_TOKENS(_tokena, _tokenb) \
86 LTTNG_UST___TP_COMBINE_TOKENS(_tokena, _tokenb)
87 #define LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
88 _tokena##_tokenb##_tokenc
89 #define LTTNG_UST__TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc) \
90 LTTNG_UST___TP_COMBINE_TOKENS3(_tokena, _tokenb, _tokenc)
91 #define LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
92 _tokena##_tokenb##_tokenc##_tokend
93 #define LTTNG_UST__TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend) \
94 LTTNG_UST___TP_COMBINE_TOKENS4(_tokena, _tokenb, _tokenc, _tokend)
97 * LTTNG_UST__TP_EXVAR* extract the var names.
98 * LTTNG_UST__TP_EXVAR1 and LTTNG_UST__TP_EXDATA_VAR1 are needed for -std=c99.
100 #define LTTNG_UST__TP_EXVAR0()
101 #define LTTNG_UST__TP_EXVAR1(a)
102 #define LTTNG_UST__TP_EXVAR2(a,b) b
103 #define LTTNG_UST__TP_EXVAR4(a,b,c,d) b,d
104 #define LTTNG_UST__TP_EXVAR6(a,b,c,d,e,f) b,d,f
105 #define LTTNG_UST__TP_EXVAR8(a,b,c,d,e,f,g,h) b,d,f,h
106 #define LTTNG_UST__TP_EXVAR10(a,b,c,d,e,f,g,h,i,j) b,d,f,h,j
107 #define LTTNG_UST__TP_EXVAR12(a,b,c,d,e,f,g,h,i,j,k,l) b,d,f,h,j,l
108 #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
109 #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
110 #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
111 #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
113 #define LTTNG_UST__TP_EXDATA_VAR0() __tp_data
114 #define LTTNG_UST__TP_EXDATA_VAR1(a) __tp_data
115 #define LTTNG_UST__TP_EXDATA_VAR2(a,b) __tp_data,b
116 #define LTTNG_UST__TP_EXDATA_VAR4(a,b,c,d) __tp_data,b,d
117 #define LTTNG_UST__TP_EXDATA_VAR6(a,b,c,d,e,f) __tp_data,b,d,f
118 #define LTTNG_UST__TP_EXDATA_VAR8(a,b,c,d,e,f,g,h) __tp_data,b,d,f,h
119 #define LTTNG_UST__TP_EXDATA_VAR10(a,b,c,d,e,f,g,h,i,j) __tp_data,b,d,f,h,j
120 #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
121 #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
122 #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
123 #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
124 #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
127 * LTTNG_UST__TP_EXPROTO* extract tuples of type, var.
128 * LTTNG_UST__TP_EXPROTO1 and LTTNG_UST__TP_EXDATA_PROTO1 are needed for -std=c99.
130 #define LTTNG_UST__TP_EXPROTO0() void
131 #define LTTNG_UST__TP_EXPROTO1(a) void
132 #define LTTNG_UST__TP_EXPROTO2(a,b) a b
133 #define LTTNG_UST__TP_EXPROTO4(a,b,c,d) a b,c d
134 #define LTTNG_UST__TP_EXPROTO6(a,b,c,d,e,f) a b,c d,e f
135 #define LTTNG_UST__TP_EXPROTO8(a,b,c,d,e,f,g,h) a b,c d,e f,g h
136 #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
137 #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
138 #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
139 #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
140 #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
141 #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
143 #define LTTNG_UST__TP_EXDATA_PROTO0() void *__tp_data
144 #define LTTNG_UST__TP_EXDATA_PROTO1(a) void *__tp_data
145 #define LTTNG_UST__TP_EXDATA_PROTO2(a,b) void *__tp_data,a b
146 #define LTTNG_UST__TP_EXDATA_PROTO4(a,b,c,d) void *__tp_data,a b,c d
147 #define LTTNG_UST__TP_EXDATA_PROTO6(a,b,c,d,e,f) void *__tp_data,a b,c d,e f
148 #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
149 #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
150 #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
151 #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
152 #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
153 #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
154 #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
156 /* Preprocessor trick to count arguments. Inspired from sdt.h. */
157 #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)
158 #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
159 #define LTTNG_UST__TP_PROTO_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXPROTO, N)(__VA_ARGS__))
160 #define LTTNG_UST__TP_VAR_N(N, ...) LTTNG_UST__TP_PARAMS(LTTNG_UST__TP_COMBINE_TOKENS(LTTNG_UST__TP_EXVAR, N)(__VA_ARGS__))
161 #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__))
162 #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__))
163 #define LTTNG_UST__TP_ARGS_PROTO(...) LTTNG_UST__TP_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
164 #define LTTNG_UST__TP_ARGS_VAR(...) LTTNG_UST__TP_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
165 #define LTTNG_UST__TP_ARGS_DATA_PROTO(...) LTTNG_UST__TP_DATA_PROTO_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
166 #define LTTNG_UST__TP_ARGS_DATA_VAR(...) LTTNG_UST__TP_DATA_VAR_N(LTTNG_UST__TP_NARGS(0, ##__VA_ARGS__), ##__VA_ARGS__)
167 #define LTTNG_UST__TP_PARAMS(...) __VA_ARGS__
170 * sizeof(#_provider) - 1 : length of the provider string (excluding \0).
171 * sizeof(#_name) - 1 : length of the name string (excluding \0).
172 * + 1 : separator between provider and event name.
174 * Upper bound (inclusive) is LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1 to
178 * left hand side: sizeof(#_provider) - 1 + sizeof(#_name) - 1 + 1
179 * right hand side: LTTNG_UST_TRACEPOINT_NAME_LEN_MAX - 1
180 * operator: <= (inclusive)
181 * Simplified in the code below.
183 #define lttng_ust_tracepoint_validate_name_len(_provider, _name) \
184 lttng_ust_static_assert(sizeof(#_provider) + sizeof(#_name) <= LTTNG_UST_TRACEPOINT_NAME_LEN_MAX, \
185 "Tracepoint name length is too long", \
186 Tracepoint_name_length_is_too_long)
189 * The tracepoint cb is marked always inline so we can distinguish
190 * between caller's ip addresses within the probe using the return
193 #define LTTNG_UST__DECLARE_TRACEPOINT(_provider, _name, ...) \
194 extern struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \
195 LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY; \
197 void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \
198 __attribute__((always_inline, unused)) lttng_ust_notrace; \
200 void lttng_ust_tracepoint_cb_##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(__VA_ARGS__)) \
202 struct lttng_ust_tracepoint_probe *__tp_probe; \
204 if (caa_unlikely(!LTTNG_UST_TP_RCU_LINK_TEST())) \
206 lttng_ust_tp_rcu_read_lock(); \
207 __tp_probe = lttng_ust_tp_rcu_dereference(lttng_ust_tracepoint_##_provider##___##_name.probes); \
208 if (caa_unlikely(!__tp_probe)) \
211 void (*__tp_cb)(void) = __tp_probe->func; \
212 void *__tp_data = __tp_probe->data; \
214 URCU_FORCE_CAST(void (*)(LTTNG_UST__TP_ARGS_DATA_PROTO(__VA_ARGS__)), __tp_cb) \
215 (LTTNG_UST__TP_ARGS_DATA_VAR(__VA_ARGS__)); \
216 } while ((++__tp_probe)->func); \
218 lttng_ust_tp_rcu_read_unlock(); \
221 void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \
222 void (*func)(void), void *data) \
225 void lttng_ust_tracepoint_register_##_provider##___##_name(char *provider_name, char *event_name, \
226 void (*func)(void), void *data) \
228 lttng_ust_tracepoint_provider_register(provider_name, event_name, func, data, \
229 lttng_ust_tracepoint_##_provider##___##_name.signature); \
232 void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \
233 void (*func)(void), void *data) \
236 void lttng_ust_tracepoint_unregister_##_provider##___##_name(char *provider_name, char *event_name, \
237 void (*func)(void), void *data) \
239 lttng_ust_tracepoint_provider_unregister(provider_name, event_name, func, data); \
243 * Registration of tracepoint provider probe functions with
244 * lttng_ust_tracepoint_provider_register, unregistration with
245 * lttng_ust_tracepoint_provider_unregister.
247 int lttng_ust_tracepoint_provider_register(const char *provider_name
, const char *event_name
,
248 void (*func
)(void), void *data
, const char *signature
);
249 int lttng_ust_tracepoint_provider_unregister(const char *provider_name
, const char *event_name
,
250 void (*func
)(void), void *data
);
253 * Registration of tracepoint instrumentation modules with lttng_ust_tracepoint_module_register,
254 * unregistration with lttng_ust_tracepoint_module_unregister.
256 int lttng_ust_tracepoint_module_register(struct lttng_ust_tracepoint
* const *tracepoints_start
,
257 int tracepoints_count
);
258 int lttng_ust_tracepoint_module_unregister(struct lttng_ust_tracepoint
* const *tracepoints_start
);
261 * tracepoint dynamic linkage handling (callbacks). Hidden visibility:
262 * shared across objects in a module/main executable.
264 * IMPORTANT: this structure is part of the ABI between instrumented
265 * applications and UST. Fields need to be only added at the end, never
266 * reordered, never removed.
268 * The field @struct_size should be used to determine the size of the
269 * structure. It should be queried before using additional fields added
270 * at the end of the structure.
272 struct lttng_ust_tracepoint_dlopen
{
273 uint32_t struct_size
;
275 void *liblttngust_handle
;
277 int (*lttng_ust_tracepoint_module_register
)(struct lttng_ust_tracepoint
* const *tracepoints_start
,
278 int tracepoints_count
);
279 int (*lttng_ust_tracepoint_module_unregister
)(struct lttng_ust_tracepoint
* const *tracepoints_start
);
280 void (*rcu_read_lock_sym
)(void);
281 void (*rcu_read_unlock_sym
)(void);
282 void *(*rcu_dereference_sym
)(void *p
);
284 /* End of base ABI. Fields below should be used after checking struct_size. */
287 extern struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen
;
288 extern struct lttng_ust_tracepoint_dlopen
*lttng_ust_tracepoint_dlopen_ptr
;
291 * These weak symbols, the constructor, and destructor take care of
292 * registering only _one_ instance of the tracepoints per shared-ojbect
293 * (or for the whole main program).
295 int lttng_ust_tracepoint_registered
296 __attribute__((weak
, visibility("hidden")));
297 int lttng_ust_tracepoint_ptrs_registered
298 __attribute__((weak
, visibility("hidden")));
299 struct lttng_ust_tracepoint_dlopen lttng_ust_tracepoint_dlopen
300 __attribute__((weak
, visibility("hidden"))) = {
301 .struct_size
= sizeof(struct lttng_ust_tracepoint_dlopen
),
304 * Deal with gcc O1 optimisation issues with weak hidden symbols. gcc
305 * 4.8 and prior does not have the same behavior for symbol scoping on
306 * 32-bit powerpc depending on the object size: symbols for objects of 8
307 * bytes or less have the same address throughout a module, whereas they
308 * have different addresses between compile units for objects larger
309 * than 8 bytes. Add this pointer indirection to ensure that the symbol
310 * scoping match that of the other weak hidden symbols found in this
313 struct lttng_ust_tracepoint_dlopen
*lttng_ust_tracepoint_dlopen_ptr
314 __attribute__((weak
, visibility("hidden")));
317 * Tracepoint dynamic linkage handling (callbacks). Hidden visibility: shared
318 * across objects in a module/main executable. The callbacks are used to
319 * control and check if the destructors should be executed.
321 * IMPORTANT: this structure is part of the ABI between instrumented
322 * applications and UST. Fields need to be only added at the end, never
323 * reordered, never removed.
325 * The field @struct_size should be used to determine the size of the
326 * structure. It should be queried before using additional fields added
327 * at the end of the structure.
329 struct lttng_ust_tracepoint_destructors_syms
{
330 uint32_t struct_size
;
332 void (*tracepoint_disable_destructors
)(void);
333 int (*tracepoint_get_destructors_state
)(void);
335 /* End of base ABI. Fields below should be used after checking struct_size. */
338 extern struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms
;
339 extern struct lttng_ust_tracepoint_destructors_syms
*lttng_ust_tracepoint_destructors_syms_ptr
;
341 struct lttng_ust_tracepoint_destructors_syms lttng_ust_tracepoint_destructors_syms
342 __attribute__((weak
, visibility("hidden"))) = {
343 .struct_size
= sizeof(struct lttng_ust_tracepoint_destructors_syms
),
345 struct lttng_ust_tracepoint_destructors_syms
*lttng_ust_tracepoint_destructors_syms_ptr
346 __attribute__((weak
, visibility("hidden")));
348 static inline void tracepoint_disable_destructors(void)
350 if (!lttng_ust_tracepoint_dlopen_ptr
)
351 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
352 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
353 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
354 if (lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
355 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors
)
356 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors();
361 lttng_ust_tracepoint__init_urcu_sym(void)
364 lttng_ust_tracepoint__init_urcu_sym(void)
366 if (!lttng_ust_tracepoint_dlopen_ptr
)
367 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
369 * Symbols below are needed by tracepoint call sites and probe
372 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_read_lock_sym
)
373 lttng_ust_tracepoint_dlopen_ptr
->rcu_read_lock_sym
=
374 URCU_FORCE_CAST(void (*)(void),
375 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
376 "lttng_ust_tp_rcu_read_lock"));
377 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_read_unlock_sym
)
378 lttng_ust_tracepoint_dlopen_ptr
->rcu_read_unlock_sym
=
379 URCU_FORCE_CAST(void (*)(void),
380 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
381 "lttng_ust_tp_rcu_read_unlock"));
382 if (!lttng_ust_tracepoint_dlopen_ptr
->rcu_dereference_sym
)
383 lttng_ust_tracepoint_dlopen_ptr
->rcu_dereference_sym
=
384 URCU_FORCE_CAST(void *(*)(void *p
),
385 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
386 "lttng_ust_tp_rcu_dereference_sym"));
390 lttng_ust_tracepoint__init_urcu_sym(void)
393 lttng_ust_tracepoint__init_urcu_sym(void)
399 * Use getenv() directly and bypass lttng-ust helper functions
400 * because we may not have access to lttng-ust shared libraries.
402 #ifdef LTTNG_UST_DEBUG
404 bool lttng_ust_tracepoint_logging_debug_enabled(void)
408 #else /* #ifdef LTTNG_UST_DEBUG */
410 bool lttng_ust_tracepoint_logging_debug_enabled(void)
412 return getenv("LTTNG_UST_DEBUG");
414 #endif /* #ifdef LTTNG_UST_DEBUG */
416 #define LTTNG_UST_TRACEPOINT_THIS_IP \
417 ({ __label__ here; here: &&here; })
420 lttng_ust_tracepoints_print_disabled_message(void)
422 if (!lttng_ust_tracepoint_logging_debug_enabled())
424 fprintf(stderr
, "lttng-ust-tracepoint [%ld]: dlopen() failed to find '%s', tracepoints in this binary won't be registered. "
425 "(at addr=%p in %s() at " __FILE__
":" lttng_ust_stringify(__LINE__
) ")\n",
427 LTTNG_UST_TRACEPOINT_LIB_SONAME
,
428 LTTNG_UST_TRACEPOINT_THIS_IP
,
433 lttng_ust__tracepoints__init(void)
434 lttng_ust_notrace
__attribute__((constructor
));
436 lttng_ust__tracepoints__init(void)
438 if (lttng_ust_tracepoint_registered
++) {
439 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
441 lttng_ust_tracepoint__init_urcu_sym();
445 if (!lttng_ust_tracepoint_dlopen_ptr
)
446 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
447 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
448 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
449 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
450 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
451 lttng_ust_tracepoints_print_disabled_message();
454 lttng_ust_tracepoint__init_urcu_sym();
458 lttng_ust__tracepoints__destroy(void)
459 lttng_ust_notrace
__attribute__((destructor
));
461 lttng_ust__tracepoints__destroy(void)
465 if (--lttng_ust_tracepoint_registered
)
467 if (!lttng_ust_tracepoint_dlopen_ptr
)
468 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
469 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
470 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
471 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
473 if (lttng_ust_tracepoint_ptrs_registered
)
476 * Lookup if destructors must be executed using the new method.
478 if (lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
479 && !lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()) {
481 * The tracepoint_get_destructors_state symbol was found with
482 * dlsym but its returned value is 0 meaning that destructors
483 * must not be executed.
487 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
489 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
492 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
495 #if LTTNG_UST_COMPAT_API(0)
496 # if defined(TRACEPOINT_DEFINE) && !defined(LTTNG_UST_TRACEPOINT_DEFINE)
497 # define LTTNG_UST_TRACEPOINT_DEFINE
499 #endif /* #if LTTNG_UST_COMPAT_API(0) */
501 #ifdef LTTNG_UST_TRACEPOINT_DEFINE
504 * These weak symbols, the constructor, and destructor take care of
505 * registering only _one_ instance of the tracepoints per shared-ojbect
506 * (or for the whole main program).
508 extern struct lttng_ust_tracepoint
* const __start_lttng_ust_tracepoints_ptrs
[]
509 __attribute__((weak
, visibility("hidden")));
510 extern struct lttng_ust_tracepoint
* const __stop_lttng_ust_tracepoints_ptrs
[]
511 __attribute__((weak
, visibility("hidden")));
514 * When LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a
515 * unresolved symbol that requires the provider to be linked in. When
516 * LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an
517 * unresolved symbol that depends on having the provider linked in,
518 * otherwise the linker complains. This deals with use of static
519 * libraries, ensuring that the linker does not remove the provider
520 * object from the executable.
523 #if LTTNG_UST_COMPAT_API(0)
524 # if defined(TRACEPOINT_PROBE_DYNAMIC_LINKAGE) && !defined(LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE)
525 # define LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
527 #endif /* #if LTTNG_UST_COMPAT_API(0) */
529 #ifdef LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
530 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) NULL
531 #else /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
532 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) <tng_ust_tracepoint_provider_##provider
533 #endif /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
536 * Note: to allow PIC code, we need to allow the linker to update the pointers
537 * in the lttng_ust_tracepoints_ptrs section.
538 * Therefore, this section is _not_ const (read-only).
540 #define LTTNG_UST__TP_EXTRACT_STRING(...) #__VA_ARGS__
542 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args) \
543 lttng_ust_tracepoint_validate_name_len(_provider, _name); \
544 extern int lttng_ust_tracepoint_provider_##_provider \
545 LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY; \
546 static const char lttng_ust_tp_provider_strtab_##_provider##___##_name[] \
547 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
549 static const char lttng_ust_tp_name_strtab_##_provider##___##_name[] \
550 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
552 struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \
553 __attribute__((section("lttng_ust_tracepoints"))) \
554 LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY = { \
555 sizeof(struct lttng_ust_tracepoint), \
556 lttng_ust_tp_provider_strtab_##_provider##___##_name, \
557 lttng_ust_tp_name_strtab_##_provider##___##_name, \
560 LTTNG_UST__TRACEPOINT_UNDEFINED_REF(_provider), \
561 LTTNG_UST__TP_EXTRACT_STRING(_args), \
563 static struct lttng_ust_tracepoint * \
564 lttng_ust_tracepoint_ptr_##_provider##___##_name \
565 __attribute__((section("lttng_ust_tracepoints_ptrs"), used)) \
566 __lttng_ust_variable_attribute_no_sanitize_address = \
567 <tng_ust_tracepoint_##_provider##___##_name;
570 lttng_ust__tracepoints__ptrs_init(void)
571 lttng_ust_notrace
__attribute__((constructor
));
573 lttng_ust__tracepoints__ptrs_init(void)
575 if (lttng_ust_tracepoint_ptrs_registered
++)
577 if (!lttng_ust_tracepoint_dlopen_ptr
)
578 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
579 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
580 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
581 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
582 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
583 lttng_ust_tracepoints_print_disabled_message();
586 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
587 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
588 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
=
589 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *, int),
590 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
591 "lttng_ust_tracepoint_module_register"));
592 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
=
593 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *),
594 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
595 "lttng_ust_tracepoint_module_unregister"));
596 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors
=
597 URCU_FORCE_CAST(void (*)(void),
598 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
599 "lttng_ust_tp_disable_destructors"));
600 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
=
601 URCU_FORCE_CAST(int (*)(void),
602 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
603 "lttng_ust_tp_get_destructors_state"));
604 lttng_ust_tracepoint__init_urcu_sym();
605 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
) {
606 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register(__start_lttng_ust_tracepoints_ptrs
,
607 __stop_lttng_ust_tracepoints_ptrs
-
608 __start_lttng_ust_tracepoints_ptrs
);
613 lttng_ust__tracepoints__ptrs_destroy(void)
614 lttng_ust_notrace
__attribute__((destructor
));
616 lttng_ust__tracepoints__ptrs_destroy(void)
620 if (--lttng_ust_tracepoint_ptrs_registered
)
622 if (!lttng_ust_tracepoint_dlopen_ptr
)
623 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
624 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
625 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
626 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
)
627 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister(__start_lttng_ust_tracepoints_ptrs
);
628 if (lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
629 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
630 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()
631 && !lttng_ust_tracepoint_ptrs_registered
) {
632 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
634 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
637 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
641 #else /* LTTNG_UST_TRACEPOINT_DEFINE */
643 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args)
645 #endif /* #else LTTNG_UST_TRACEPOINT_DEFINE */
647 #if LTTNG_UST_COMPAT_API(0)
648 #define tracepoint lttng_ust_tracepoint
649 #define do_tracepoint lttng_ust_do_tracepoint
650 #define tracepoint_enabled lttng_ust_tracepoint_enabled
651 #define TP_ARGS LTTNG_UST_TP_ARGS
652 #endif /* #if LTTNG_UST_COMPAT_API(0) */
658 #endif /* _LTTNG_UST_TRACEPOINT_H */
660 /* The following declarations must be outside re-inclusion protection. */
663 * LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION: Define this before including
664 * a tracepoint instrumentation header to hide symbols associated with
665 * tracepoint module instrumentation. This is useful if all compile
666 * units using the lttng_ust_tracepoint(),
667 * lttng_ust_tracepoint_enabled() and lttng_ust_do_tracepoint() macros
668 * is within the same module as the compile unit including the
669 * tracepoint header after defining LTTNG_UST_TRACEPOINT_DEFINE.
672 #undef LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY
673 #ifdef LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION
674 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
676 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("default")))
680 * LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION: Define this before
681 * including a tracepoint instrumentation header to hide symbols
682 * associated with the tracepoint provider. This is useful if the
683 * tracepoint definition (including the header after defining
684 * LTTNG_UST_TRACEPOINT_DEFINE) is in the same module as the provider
685 * (including the header after defining
686 * LTTNG_UST_TRACEPOINT_CREATE_PROBES).
688 #undef LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY
689 #ifdef LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
690 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
692 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("default")))
695 #ifndef LTTNG_UST_TRACEPOINT_ENUM
698 * Tracepoint Enumerations
700 * The enumeration is a mapping between an integer, or range of integers, and
701 * a string. It can be used to have a more compact trace in cases where the
702 * possible values for a field are limited:
706 * LTTNG_UST_TRACEPOINT_ENUM(someproject_component, enumname,
707 * LTTNG_UST_TP_ENUM_VALUES(
708 * lttng_ust_field_enum_value("even", 0)
709 * lttng_ust_field_enum_value("uneven", 1)
710 * lttng_ust_field_enum_range("twoto4", 2, 4)
711 * lttng_ust_field_enum_value("five", 5)
715 * Where "someproject_component" is the name of the component this enumeration
716 * belongs to and "enumname" identifies this enumeration. Inside the
717 * LTTNG_UST_TP_ENUM_VALUES macro is the actual mapping. Each string value can map
718 * to either a single value with lttng_ust_field_enum_value or a range of values
719 * with lttng_ust_field_enum_range.
721 * Enumeration ranges may overlap, but the behavior is implementation-defined,
722 * each trace reader will handle overlapping as it wishes.
724 * That enumeration can then be used in a field inside the TP_FIELD macro using
725 * the following line:
727 * lttng_ust_field_enum(someproject_component, enumname, enumtype, enumfield, enumval)
729 * Where "someproject_component" and "enumname" match those in the
730 * LTTNG_UST_TRACEPOINT_ENUM, "enumtype" is a signed or unsigned integer type
731 * backing the enumeration, "enumfield" is the name of the field and
732 * "enumval" is the value.
735 #define LTTNG_UST_TRACEPOINT_ENUM(provider, name, values)
737 #if LTTNG_UST_COMPAT_API(0)
738 #define TRACEPOINT_ENUM LTTNG_UST_TRACEPOINT_ENUM
739 #endif /* #if LTTNG_UST_COMPAT_API(0) */
741 #endif /* #ifndef LTTNG_UST_TRACEPOINT_ENUM */
743 #ifndef LTTNG_UST_TRACEPOINT_EVENT
746 * How to use the LTTNG_UST_TRACEPOINT_EVENT macro:
750 * LTTNG_UST_TRACEPOINT_EVENT(someproject_component, event_name,
752 * * LTTNG_UST_TP_ARGS takes from 0 to 10 "type, field_name" pairs *
754 * LTTNG_UST_TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen,
755 * long *, arg4, size_t, arg4_len),
757 * * LTTNG_UST_TP_FIELDS describes the event payload layout in the trace *
759 * LTTNG_UST_TP_FIELDS(
760 * * Integer, printed in base 10 *
761 * lttng_ust_field_integer(int, field_a, arg0)
763 * * Integer, printed with 0x base 16 *
764 * lttng_ust_field_integer_hex(unsigned long, field_d, arg1)
767 * lttng_ust_field_enum(someproject_component, enum_name, int, field_e, arg0)
769 * * Array Sequence, printed as UTF8-encoded array of bytes *
770 * lttng_ust_field_array_text(char, field_b, string, FIXED_LEN)
771 * lttng_ust_field_sequence_text(char, field_c, string, size_t, strlen)
773 * * String, printed as UTF8-encoded string *
774 * lttng_ust_field_string(field_e, string)
776 * * Array sequence of signed integer values *
777 * lttng_ust_field_array(long, field_f, arg4, FIXED_LEN4)
778 * lttng_ust_field_sequence(long, field_g, arg4, size_t, arg4_len)
782 * More detailed explanation:
784 * The name of the tracepoint is expressed as a tuple with the provider
785 * and name arguments.
787 * The provider and name should be a proper C99 identifier.
788 * The "provider" and "name" MUST follow these rules to ensure no
789 * namespace clash occurs:
791 * For projects (applications and libraries) for which an entity
792 * specific to the project controls the source code and thus its
793 * tracepoints (typically with a scope larger than a single company):
796 * project_component, event
800 * Where "project" is the name of the project,
801 * "component" is the name of the project component (which may
802 * include several levels of sub-components, e.g.
803 * ...component_subcomponent_...) where the tracepoint is located
805 * "event" is the name of the tracepoint event.
807 * For projects issued from a single company wishing to advertise that
808 * the company controls the source code and thus the tracepoints, the
809 * "com_" prefix should be used:
812 * com_company_project_component, event
814 * com_company_project, event
816 * Where "company" is the name of the company,
817 * "project" is the name of the project,
818 * "component" is the name of the project component (which may
819 * include several levels of sub-components, e.g.
820 * ...component_subcomponent_...) where the tracepoint is located
822 * "event" is the name of the tracepoint event.
824 * the provider:event identifier is limited to 127 characters.
827 #define LTTNG_UST_TRACEPOINT_EVENT(provider, name, args, fields) \
828 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
829 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
831 #define LTTNG_UST_TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
833 #define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(template_provider, template_name, provider, name, args) \
834 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
835 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
837 #if LTTNG_UST_COMPAT_API(0)
838 #define TRACEPOINT_EVENT LTTNG_UST_TRACEPOINT_EVENT
839 #define TRACEPOINT_EVENT_CLASS LTTNG_UST_TRACEPOINT_EVENT_CLASS
840 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, args) \
841 LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_provider, _template, \
842 _provider, _name, LTTNG_UST__TP_PARAMS(args))
844 #endif /* #if LTTNG_UST_COMPAT_API(0) */
846 #endif /* #ifndef LTTNG_UST_TRACEPOINT_EVENT */
848 #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL
851 * Tracepoint Loglevels
853 * Typical use of these loglevels:
855 * The loglevels go from 0 to 14. Higher numbers imply the most
856 * verbosity (higher event throughput expected.
858 * Loglevels 0 through 6, and loglevel 14, match syslog(3) loglevels
859 * semantic. Loglevels 7 through 13 offer more fine-grained selection of
862 * LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG 0
865 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT 1
866 * action must be taken immediately
868 * LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT 2
869 * critical conditions
871 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR 3
874 * LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING 4
877 * LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE 5
878 * normal, but significant, condition
880 * LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO 6
881 * informational message
883 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM 7
884 * debug information with system-level scope (set of programs)
886 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM 8
887 * debug information with program-level scope (set of processes)
889 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS 9
890 * debug information with process-level scope (set of modules)
892 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE 10
893 * debug information with module (executable/library) scope (set of units)
895 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT 11
896 * debug information with compilation unit scope (set of functions)
898 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION 12
899 * debug information with function-level scope
901 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE 13
902 * debug information with line-level scope (LTTNG_UST_TRACEPOINT_EVENT default)
904 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG 14
905 * debug-level message
907 * Declare tracepoint loglevels for tracepoints. A LTTNG_UST_TRACEPOINT_EVENT
908 * should be declared prior to the the LTTNG_UST_TRACEPOINT_LOGLEVEL for a given
909 * tracepoint name. The first field is the provider name, the second
910 * field is the name of the tracepoint, the third field is the loglevel
913 * LTTNG_UST_TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >,
916 * The LTTNG_UST_TRACEPOINT_PROVIDER must be already declared before declaring a
917 * LTTNG_UST_TRACEPOINT_LOGLEVEL.
921 LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
= 0,
922 LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
= 1,
923 LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
= 2,
924 LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
= 3,
925 LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
= 4,
926 LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
= 5,
927 LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
= 6,
928 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
= 7,
929 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
= 8,
930 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
= 9,
931 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
= 10,
932 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
= 11,
933 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
= 12,
934 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
= 13,
935 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
= 14,
938 #define LTTNG_UST_TRACEPOINT_LOGLEVEL(provider, name, loglevel)
940 #if LTTNG_UST_COMPAT_API(0)
941 #define TRACEPOINT_LOGLEVEL LTTNG_UST_TRACEPOINT_LOGLEVEL
943 #define TRACE_EMERG LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
944 #define TRACE_ALERT LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
945 #define TRACE_CRIT LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
946 #define TRACE_ERR LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
947 #define TRACE_WARNING LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
948 #define TRACE_NOTICE LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
949 #define TRACE_INFO LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
950 #define TRACE_DEBUG_SYSTEM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
951 #define TRACE_DEBUG_PROGRAM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
952 #define TRACE_DEBUG_PROCESS LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
953 #define TRACE_DEBUG_MODULE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
954 #define TRACE_DEBUG_UNIT LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
955 #define TRACE_DEBUG_FUNCTION LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
956 #define TRACE_DEBUG_LINE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
957 #define TRACE_DEBUG LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
960 #endif /* #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL */
962 #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
964 #define LTTNG_UST_TRACEPOINT_MODEL_EMF_URI(provider, name, uri)
966 #if LTTNG_UST_COMPAT_API(0)
967 #define TRACEPOINT_MODEL_EMF_URI LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
970 #endif /* #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI */