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 #ifdef LTTNG_UST_ABORT_ON_CRITICAL
418 bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void)
422 #else /* #ifdef LTTNG_UST_ABORT_ON_CRITICAL */
424 bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void)
426 return getenv("LTTNG_UST_ABORT_ON_CRITICAL");
430 #define LTTNG_UST_TRACEPOINT_THIS_IP \
431 ({ __label__ here; here: &&here; })
434 lttng_ust_tracepoints_print_disabled_message(void)
436 if (lttng_ust_tracepoint_logging_debug_enabled())
437 fprintf(stderr
, "lttng-ust-tracepoint [%ld]: Critical: dlopen() failed to find '%s', tracepoints in this binary won't be registered. "
438 "(at addr=%p in %s() at " __FILE__
":" lttng_ust_stringify(__LINE__
) ")\n",
440 LTTNG_UST_TRACEPOINT_LIB_SONAME
,
441 LTTNG_UST_TRACEPOINT_THIS_IP
,
443 if (lttng_ust_tracepoint_logging_abort_on_critical_enabled())
448 lttng_ust__tracepoints__init(void)
449 lttng_ust_notrace
__attribute__((constructor
));
451 lttng_ust__tracepoints__init(void)
453 if (lttng_ust_tracepoint_registered
++) {
454 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
456 lttng_ust_tracepoint__init_urcu_sym();
460 if (!lttng_ust_tracepoint_dlopen_ptr
)
461 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
462 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
463 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
464 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
465 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
466 lttng_ust_tracepoints_print_disabled_message();
469 lttng_ust_tracepoint__init_urcu_sym();
473 lttng_ust__tracepoints__destroy(void)
474 lttng_ust_notrace
__attribute__((destructor
));
476 lttng_ust__tracepoints__destroy(void)
480 if (--lttng_ust_tracepoint_registered
)
482 if (!lttng_ust_tracepoint_dlopen_ptr
)
483 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
484 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
485 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
486 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
488 if (lttng_ust_tracepoint_ptrs_registered
)
491 * Lookup if destructors must be executed using the new method.
493 if (lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
494 && !lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()) {
496 * The tracepoint_get_destructors_state symbol was found with
497 * dlsym but its returned value is 0 meaning that destructors
498 * must not be executed.
502 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
504 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
507 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
510 #if LTTNG_UST_COMPAT_API(0)
511 # if defined(TRACEPOINT_DEFINE) && !defined(LTTNG_UST_TRACEPOINT_DEFINE)
512 # define LTTNG_UST_TRACEPOINT_DEFINE
514 #endif /* #if LTTNG_UST_COMPAT_API(0) */
516 #ifdef LTTNG_UST_TRACEPOINT_DEFINE
519 * These weak symbols, the constructor, and destructor take care of
520 * registering only _one_ instance of the tracepoints per shared-ojbect
521 * (or for the whole main program).
523 extern struct lttng_ust_tracepoint
* const __start_lttng_ust_tracepoints_ptrs
[]
524 __attribute__((weak
, visibility("hidden")));
525 extern struct lttng_ust_tracepoint
* const __stop_lttng_ust_tracepoints_ptrs
[]
526 __attribute__((weak
, visibility("hidden")));
529 * When LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is defined, we do not emit a
530 * unresolved symbol that requires the provider to be linked in. When
531 * LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE is not defined, we emit an
532 * unresolved symbol that depends on having the provider linked in,
533 * otherwise the linker complains. This deals with use of static
534 * libraries, ensuring that the linker does not remove the provider
535 * object from the executable.
538 #if LTTNG_UST_COMPAT_API(0)
539 # if defined(TRACEPOINT_PROBE_DYNAMIC_LINKAGE) && !defined(LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE)
540 # define LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
542 #endif /* #if LTTNG_UST_COMPAT_API(0) */
544 #ifdef LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE
545 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) NULL
546 #else /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
547 #define LTTNG_UST__TRACEPOINT_UNDEFINED_REF(provider) <tng_ust_tracepoint_provider_##provider
548 #endif /* LTTNG_UST_TRACEPOINT_PROBE_DYNAMIC_LINKAGE */
551 * Note: to allow PIC code, we need to allow the linker to update the pointers
552 * in the lttng_ust_tracepoints_ptrs section.
553 * Therefore, this section is _not_ const (read-only).
555 #define LTTNG_UST__TP_EXTRACT_STRING(...) #__VA_ARGS__
557 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args) \
558 lttng_ust_tracepoint_validate_name_len(_provider, _name); \
559 extern int lttng_ust_tracepoint_provider_##_provider \
560 LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY; \
561 static const char lttng_ust_tp_provider_strtab_##_provider##___##_name[] \
562 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
564 static const char lttng_ust_tp_name_strtab_##_provider##___##_name[] \
565 __attribute__((section("lttng_ust_tracepoints_strings"))) = \
567 struct lttng_ust_tracepoint lttng_ust_tracepoint_##_provider##___##_name \
568 __attribute__((section("lttng_ust_tracepoints"))) \
569 LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY = { \
570 sizeof(struct lttng_ust_tracepoint), \
571 lttng_ust_tp_provider_strtab_##_provider##___##_name, \
572 lttng_ust_tp_name_strtab_##_provider##___##_name, \
575 LTTNG_UST__TRACEPOINT_UNDEFINED_REF(_provider), \
576 LTTNG_UST__TP_EXTRACT_STRING(_args), \
578 static struct lttng_ust_tracepoint * \
579 lttng_ust_tracepoint_ptr_##_provider##___##_name \
580 __attribute__((section("lttng_ust_tracepoints_ptrs"), used)) \
581 __lttng_ust_variable_attribute_no_sanitize_address = \
582 <tng_ust_tracepoint_##_provider##___##_name;
585 lttng_ust__tracepoints__ptrs_init(void)
586 lttng_ust_notrace
__attribute__((constructor
));
588 lttng_ust__tracepoints__ptrs_init(void)
590 if (lttng_ust_tracepoint_ptrs_registered
++)
592 if (!lttng_ust_tracepoint_dlopen_ptr
)
593 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
594 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
)
595 lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
=
596 dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME
, RTLD_NOW
| RTLD_GLOBAL
);
597 if (!lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
) {
598 lttng_ust_tracepoints_print_disabled_message();
601 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
602 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
603 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
=
604 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *, int),
605 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
606 "lttng_ust_tracepoint_module_register"));
607 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
=
608 URCU_FORCE_CAST(int (*)(struct lttng_ust_tracepoint
* const *),
609 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
610 "lttng_ust_tracepoint_module_unregister"));
611 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_disable_destructors
=
612 URCU_FORCE_CAST(void (*)(void),
613 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
614 "lttng_ust_tp_disable_destructors"));
615 lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
=
616 URCU_FORCE_CAST(int (*)(void),
617 dlsym(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
,
618 "lttng_ust_tp_get_destructors_state"));
619 lttng_ust_tracepoint__init_urcu_sym();
620 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register
) {
621 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_register(__start_lttng_ust_tracepoints_ptrs
,
622 __stop_lttng_ust_tracepoints_ptrs
-
623 __start_lttng_ust_tracepoints_ptrs
);
628 lttng_ust__tracepoints__ptrs_destroy(void)
629 lttng_ust_notrace
__attribute__((destructor
));
631 lttng_ust__tracepoints__ptrs_destroy(void)
635 if (--lttng_ust_tracepoint_ptrs_registered
)
637 if (!lttng_ust_tracepoint_dlopen_ptr
)
638 lttng_ust_tracepoint_dlopen_ptr
= <tng_ust_tracepoint_dlopen
;
639 if (!lttng_ust_tracepoint_destructors_syms_ptr
)
640 lttng_ust_tracepoint_destructors_syms_ptr
= <tng_ust_tracepoint_destructors_syms
;
641 if (lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister
)
642 lttng_ust_tracepoint_dlopen_ptr
->lttng_ust_tracepoint_module_unregister(__start_lttng_ust_tracepoints_ptrs
);
643 if (lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
644 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state
645 && lttng_ust_tracepoint_destructors_syms_ptr
->tracepoint_get_destructors_state()
646 && !lttng_ust_tracepoint_ptrs_registered
) {
647 ret
= dlclose(lttng_ust_tracepoint_dlopen_ptr
->liblttngust_handle
);
649 fprintf(stderr
, "Error (%d) in dlclose\n", ret
);
652 memset(lttng_ust_tracepoint_dlopen_ptr
, 0, sizeof(*lttng_ust_tracepoint_dlopen_ptr
));
656 #else /* LTTNG_UST_TRACEPOINT_DEFINE */
658 #define LTTNG_UST__DEFINE_TRACEPOINT(_provider, _name, _args)
660 #endif /* #else LTTNG_UST_TRACEPOINT_DEFINE */
662 #if LTTNG_UST_COMPAT_API(0)
663 #define tracepoint lttng_ust_tracepoint
664 #define do_tracepoint lttng_ust_do_tracepoint
665 #define tracepoint_enabled lttng_ust_tracepoint_enabled
666 #define TP_ARGS LTTNG_UST_TP_ARGS
667 #endif /* #if LTTNG_UST_COMPAT_API(0) */
673 #endif /* _LTTNG_UST_TRACEPOINT_H */
675 /* The following declarations must be outside re-inclusion protection. */
678 * LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION: Define this before including
679 * a tracepoint instrumentation header to hide symbols associated with
680 * tracepoint module instrumentation. This is useful if all compile
681 * units using the lttng_ust_tracepoint(),
682 * lttng_ust_tracepoint_enabled() and lttng_ust_do_tracepoint() macros
683 * is within the same module as the compile unit including the
684 * tracepoint header after defining LTTNG_UST_TRACEPOINT_DEFINE.
687 #undef LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY
688 #ifdef LTTNG_UST_TRACEPOINT_HIDDEN_DEFINITION
689 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
691 #define LTTNG_UST__TRACEPOINT_DEFINITION_VISIBILITY __attribute__((visibility("default")))
695 * LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION: Define this before
696 * including a tracepoint instrumentation header to hide symbols
697 * associated with the tracepoint provider. This is useful if the
698 * tracepoint definition (including the header after defining
699 * LTTNG_UST_TRACEPOINT_DEFINE) is in the same module as the provider
700 * (including the header after defining
701 * LTTNG_UST_TRACEPOINT_CREATE_PROBES).
703 #undef LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY
704 #ifdef LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
705 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
707 #define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("default")))
710 #ifndef LTTNG_UST_TRACEPOINT_ENUM
713 * Tracepoint Enumerations
715 * The enumeration is a mapping between an integer, or range of integers, and
716 * a string. It can be used to have a more compact trace in cases where the
717 * possible values for a field are limited:
721 * LTTNG_UST_TRACEPOINT_ENUM(someproject_component, enumname,
722 * LTTNG_UST_TP_ENUM_VALUES(
723 * lttng_ust_field_enum_value("even", 0)
724 * lttng_ust_field_enum_value("uneven", 1)
725 * lttng_ust_field_enum_range("twoto4", 2, 4)
726 * lttng_ust_field_enum_value("five", 5)
730 * Where "someproject_component" is the name of the component this enumeration
731 * belongs to and "enumname" identifies this enumeration. Inside the
732 * LTTNG_UST_TP_ENUM_VALUES macro is the actual mapping. Each string value can map
733 * to either a single value with lttng_ust_field_enum_value or a range of values
734 * with lttng_ust_field_enum_range.
736 * Enumeration ranges may overlap, but the behavior is implementation-defined,
737 * each trace reader will handle overlapping as it wishes.
739 * That enumeration can then be used in a field inside the TP_FIELD macro using
740 * the following line:
742 * lttng_ust_field_enum(someproject_component, enumname, enumtype, enumfield, enumval)
744 * Where "someproject_component" and "enumname" match those in the
745 * LTTNG_UST_TRACEPOINT_ENUM, "enumtype" is a signed or unsigned integer type
746 * backing the enumeration, "enumfield" is the name of the field and
747 * "enumval" is the value.
750 #define LTTNG_UST_TRACEPOINT_ENUM(provider, name, values)
752 #if LTTNG_UST_COMPAT_API(0)
753 #define TRACEPOINT_ENUM LTTNG_UST_TRACEPOINT_ENUM
754 #endif /* #if LTTNG_UST_COMPAT_API(0) */
756 #endif /* #ifndef LTTNG_UST_TRACEPOINT_ENUM */
758 #ifndef LTTNG_UST_TRACEPOINT_EVENT
761 * How to use the LTTNG_UST_TRACEPOINT_EVENT macro:
765 * LTTNG_UST_TRACEPOINT_EVENT(someproject_component, event_name,
767 * * LTTNG_UST_TP_ARGS takes from 0 to 10 "type, field_name" pairs *
769 * LTTNG_UST_TP_ARGS(int, arg0, void *, arg1, char *, string, size_t, strlen,
770 * long *, arg4, size_t, arg4_len),
772 * * LTTNG_UST_TP_FIELDS describes the event payload layout in the trace *
774 * LTTNG_UST_TP_FIELDS(
775 * * Integer, printed in base 10 *
776 * lttng_ust_field_integer(int, field_a, arg0)
778 * * Integer, printed with 0x base 16 *
779 * lttng_ust_field_integer_hex(unsigned long, field_d, arg1)
782 * lttng_ust_field_enum(someproject_component, enum_name, int, field_e, arg0)
784 * * Array Sequence, printed as UTF8-encoded array of bytes *
785 * lttng_ust_field_array_text(char, field_b, string, FIXED_LEN)
786 * lttng_ust_field_sequence_text(char, field_c, string, size_t, strlen)
788 * * String, printed as UTF8-encoded string *
789 * lttng_ust_field_string(field_e, string)
791 * * Array sequence of signed integer values *
792 * lttng_ust_field_array(long, field_f, arg4, FIXED_LEN4)
793 * lttng_ust_field_sequence(long, field_g, arg4, size_t, arg4_len)
797 * More detailed explanation:
799 * The name of the tracepoint is expressed as a tuple with the provider
800 * and name arguments.
802 * The provider and name should be a proper C99 identifier.
803 * The "provider" and "name" MUST follow these rules to ensure no
804 * namespace clash occurs:
806 * For projects (applications and libraries) for which an entity
807 * specific to the project controls the source code and thus its
808 * tracepoints (typically with a scope larger than a single company):
811 * project_component, event
815 * Where "project" is the name of the project,
816 * "component" is the name of the project component (which may
817 * include several levels of sub-components, e.g.
818 * ...component_subcomponent_...) where the tracepoint is located
820 * "event" is the name of the tracepoint event.
822 * For projects issued from a single company wishing to advertise that
823 * the company controls the source code and thus the tracepoints, the
824 * "com_" prefix should be used:
827 * com_company_project_component, event
829 * com_company_project, event
831 * Where "company" is the name of the company,
832 * "project" is the name of the project,
833 * "component" is the name of the project component (which may
834 * include several levels of sub-components, e.g.
835 * ...component_subcomponent_...) where the tracepoint is located
837 * "event" is the name of the tracepoint event.
839 * the provider:event identifier is limited to 127 characters.
842 #define LTTNG_UST_TRACEPOINT_EVENT(provider, name, args, fields) \
843 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
844 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
846 #define LTTNG_UST_TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
848 #define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(template_provider, template_name, provider, name, args) \
849 LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
850 LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
852 #if LTTNG_UST_COMPAT_API(0)
853 #define TRACEPOINT_EVENT LTTNG_UST_TRACEPOINT_EVENT
854 #define TRACEPOINT_EVENT_CLASS LTTNG_UST_TRACEPOINT_EVENT_CLASS
855 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, args) \
856 LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_provider, _template, \
857 _provider, _name, LTTNG_UST__TP_PARAMS(args))
859 #endif /* #if LTTNG_UST_COMPAT_API(0) */
861 #endif /* #ifndef LTTNG_UST_TRACEPOINT_EVENT */
863 #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL
866 * Tracepoint Loglevels
868 * Typical use of these loglevels:
870 * The loglevels go from 0 to 14. Higher numbers imply the most
871 * verbosity (higher event throughput expected.
873 * Loglevels 0 through 6, and loglevel 14, match syslog(3) loglevels
874 * semantic. Loglevels 7 through 13 offer more fine-grained selection of
877 * LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG 0
880 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT 1
881 * action must be taken immediately
883 * LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT 2
884 * critical conditions
886 * LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR 3
889 * LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING 4
892 * LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE 5
893 * normal, but significant, condition
895 * LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO 6
896 * informational message
898 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM 7
899 * debug information with system-level scope (set of programs)
901 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM 8
902 * debug information with program-level scope (set of processes)
904 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS 9
905 * debug information with process-level scope (set of modules)
907 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE 10
908 * debug information with module (executable/library) scope (set of units)
910 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT 11
911 * debug information with compilation unit scope (set of functions)
913 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION 12
914 * debug information with function-level scope
916 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE 13
917 * debug information with line-level scope (LTTNG_UST_TRACEPOINT_EVENT default)
919 * LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG 14
920 * debug-level message
922 * Declare tracepoint loglevels for tracepoints. A LTTNG_UST_TRACEPOINT_EVENT
923 * should be declared prior to the the LTTNG_UST_TRACEPOINT_LOGLEVEL for a given
924 * tracepoint name. The first field is the provider name, the second
925 * field is the name of the tracepoint, the third field is the loglevel
928 * LTTNG_UST_TRACEPOINT_LOGLEVEL(< [com_company_]project[_component] >, < event >,
931 * The LTTNG_UST_TRACEPOINT_PROVIDER must be already declared before declaring a
932 * LTTNG_UST_TRACEPOINT_LOGLEVEL.
936 LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
= 0,
937 LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
= 1,
938 LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
= 2,
939 LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
= 3,
940 LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
= 4,
941 LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
= 5,
942 LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
= 6,
943 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
= 7,
944 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
= 8,
945 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
= 9,
946 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
= 10,
947 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
= 11,
948 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
= 12,
949 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
= 13,
950 LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
= 14,
953 #define LTTNG_UST_TRACEPOINT_LOGLEVEL(provider, name, loglevel)
955 #if LTTNG_UST_COMPAT_API(0)
956 #define TRACEPOINT_LOGLEVEL LTTNG_UST_TRACEPOINT_LOGLEVEL
958 #define TRACE_EMERG LTTNG_UST_TRACEPOINT_LOGLEVEL_EMERG
959 #define TRACE_ALERT LTTNG_UST_TRACEPOINT_LOGLEVEL_ALERT
960 #define TRACE_CRIT LTTNG_UST_TRACEPOINT_LOGLEVEL_CRIT
961 #define TRACE_ERR LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR
962 #define TRACE_WARNING LTTNG_UST_TRACEPOINT_LOGLEVEL_WARNING
963 #define TRACE_NOTICE LTTNG_UST_TRACEPOINT_LOGLEVEL_NOTICE
964 #define TRACE_INFO LTTNG_UST_TRACEPOINT_LOGLEVEL_INFO
965 #define TRACE_DEBUG_SYSTEM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_SYSTEM
966 #define TRACE_DEBUG_PROGRAM LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROGRAM
967 #define TRACE_DEBUG_PROCESS LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_PROCESS
968 #define TRACE_DEBUG_MODULE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_MODULE
969 #define TRACE_DEBUG_UNIT LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_UNIT
970 #define TRACE_DEBUG_FUNCTION LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_FUNCTION
971 #define TRACE_DEBUG_LINE LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG_LINE
972 #define TRACE_DEBUG LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG
975 #endif /* #ifndef LTTNG_UST_TRACEPOINT_LOGLEVEL */
977 #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
979 #define LTTNG_UST_TRACEPOINT_MODEL_EMF_URI(provider, name, uri)
981 #if LTTNG_UST_COMPAT_API(0)
982 #define TRACEPOINT_MODEL_EMF_URI LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
985 #endif /* #ifndef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI */