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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: MIT |
8020ceb5 | 3 | * |
c0c0989a | 4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8020ceb5 MD |
5 | * |
6 | * Holds LTTng per-session event registry. | |
8020ceb5 MD |
7 | */ |
8 | ||
c0c0989a MJ |
9 | #ifndef _LTTNG_UST_EVENTS_H |
10 | #define _LTTNG_UST_EVENTS_H | |
11 | ||
9f3fdbc6 | 12 | #include <urcu/list.h> |
1f18504e | 13 | #include <urcu/hlist.h> |
b4051ad8 | 14 | #include <stddef.h> |
9f3fdbc6 | 15 | #include <stdint.h> |
d58d1454 | 16 | #include <lttng/ust-config.h> |
4318ae1b MD |
17 | #include <lttng/ust-abi.h> |
18 | #include <lttng/ust-tracer.h> | |
2ae57758 | 19 | #include <lttng/ust-endian.h> |
20f1eee7 | 20 | #include <float.h> |
d58d1454 MD |
21 | #include <errno.h> |
22 | #include <urcu/ref.h> | |
23 | #include <pthread.h> | |
8020ceb5 | 24 | |
db56acaf MD |
25 | #ifndef LTTNG_PACKED |
26 | #error "LTTNG_PACKED should be defined" | |
27 | #endif | |
28 | ||
6453d237 MD |
29 | #ifdef __cplusplus |
30 | extern "C" { | |
31 | #endif | |
32 | ||
19d8b1b3 MD |
33 | #define LTTNG_UST_UUID_LEN 16 |
34 | ||
71d31690 MD |
35 | /* |
36 | * Tracepoint provider version. Compatibility based on the major number. | |
37 | * Older tracepoint providers can always register to newer lttng-ust | |
38 | * library, but the opposite is rejected: a newer tracepoint provider is | |
39 | * rejected by an older lttng-ust library. | |
40 | */ | |
07a3a0d5 | 41 | #define LTTNG_UST_PROVIDER_MAJOR 3 |
71d31690 MD |
42 | #define LTTNG_UST_PROVIDER_MINOR 0 |
43 | ||
7dd08bec MD |
44 | struct lttng_channel; |
45 | struct lttng_session; | |
4cfec15c | 46 | struct lttng_ust_lib_ring_buffer_ctx; |
53569322 MD |
47 | struct lttng_ust_context_app; |
48 | struct lttng_event_field; | |
cab88ff8 | 49 | struct lttng_event_notifier; |
ebabbf58 | 50 | struct lttng_event_notifier_group; |
8020ceb5 | 51 | |
37d5e202 MD |
52 | /* |
53 | * Data structures used by tracepoint event declarations, and by the | |
54 | * tracer. Those structures have padding for future extension. | |
55 | */ | |
56 | ||
c1fca457 MD |
57 | /* |
58 | * LTTng client type enumeration. Used by the consumer to map the | |
59 | * callbacks from its own address space. | |
60 | */ | |
61 | enum lttng_client_types { | |
62 | LTTNG_CLIENT_METADATA = 0, | |
63 | LTTNG_CLIENT_DISCARD = 1, | |
64 | LTTNG_CLIENT_OVERWRITE = 2, | |
34a91bdb MD |
65 | LTTNG_CLIENT_DISCARD_RT = 3, |
66 | LTTNG_CLIENT_OVERWRITE_RT = 4, | |
c1fca457 MD |
67 | LTTNG_NR_CLIENT_TYPES, |
68 | }; | |
69 | ||
8020ceb5 MD |
70 | /* Type description */ |
71 | ||
72 | /* Update the astract_types name table in lttng-types.c along with this enum */ | |
7dd08bec | 73 | enum lttng_abstract_types { |
8020ceb5 | 74 | atype_integer, |
218deb69 MD |
75 | atype_enum, /* legacy */ |
76 | atype_array, /* legacy */ | |
77 | atype_sequence, /* legacy */ | |
8020ceb5 | 78 | atype_string, |
20f1eee7 | 79 | atype_float, |
53569322 | 80 | atype_dynamic, |
218deb69 MD |
81 | atype_struct, /* legacy */ |
82 | atype_enum_nestable, | |
83 | atype_array_nestable, | |
84 | atype_sequence_nestable, | |
85 | atype_struct_nestable, | |
8020ceb5 MD |
86 | NR_ABSTRACT_TYPES, |
87 | }; | |
88 | ||
89 | /* Update the string_encodings name table in lttng-types.c along with this enum */ | |
90 | enum lttng_string_encodings { | |
91 | lttng_encode_none = 0, | |
92 | lttng_encode_UTF8 = 1, | |
93 | lttng_encode_ASCII = 2, | |
94 | NR_STRING_ENCODINGS, | |
95 | }; | |
96 | ||
a6f80644 MD |
97 | struct lttng_enum_value { |
98 | unsigned long long value; | |
99 | unsigned int signedness:1; | |
100 | }; | |
101 | ||
3e762260 PP |
102 | enum lttng_enum_entry_options { |
103 | LTTNG_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0, | |
104 | }; | |
105 | ||
37d5e202 | 106 | #define LTTNG_UST_ENUM_ENTRY_PADDING 16 |
8020ceb5 | 107 | struct lttng_enum_entry { |
a6f80644 | 108 | struct lttng_enum_value start, end; /* start and end are inclusive */ |
8020ceb5 | 109 | const char *string; |
3e762260 PP |
110 | union { |
111 | struct { | |
112 | unsigned int options; | |
113 | } LTTNG_PACKED extra; | |
114 | char padding[LTTNG_UST_ENUM_ENTRY_PADDING]; | |
115 | } u; | |
8020ceb5 MD |
116 | }; |
117 | ||
118 | #define __type_integer(_type, _byte_order, _base, _encoding) \ | |
119 | { \ | |
46d52200 ZT |
120 | .atype = atype_integer, \ |
121 | .u = \ | |
8020ceb5 | 122 | { \ |
218deb69 | 123 | .integer = \ |
46d52200 | 124 | { \ |
218deb69 MD |
125 | .size = sizeof(_type) * CHAR_BIT, \ |
126 | .alignment = lttng_alignof(_type) * CHAR_BIT, \ | |
127 | .signedness = lttng_is_signed_type(_type), \ | |
128 | .reverse_byte_order = _byte_order != BYTE_ORDER, \ | |
129 | .base = _base, \ | |
130 | .encoding = lttng_encode_##_encoding, \ | |
46d52200 | 131 | } \ |
8020ceb5 MD |
132 | }, \ |
133 | } \ | |
134 | ||
37d5e202 | 135 | #define LTTNG_UST_INTEGER_TYPE_PADDING 24 |
8020ceb5 MD |
136 | struct lttng_integer_type { |
137 | unsigned int size; /* in bits */ | |
138 | unsigned short alignment; /* in bits */ | |
139 | unsigned int signedness:1; | |
140 | unsigned int reverse_byte_order:1; | |
141 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ | |
142 | enum lttng_string_encodings encoding; | |
37d5e202 | 143 | char padding[LTTNG_UST_INTEGER_TYPE_PADDING]; |
8020ceb5 MD |
144 | }; |
145 | ||
d3ed854b MD |
146 | /* |
147 | * Only float and double are supported. long double is not supported at | |
148 | * the moment. | |
149 | */ | |
20f1eee7 MD |
150 | #define _float_mant_dig(_type) \ |
151 | (sizeof(_type) == sizeof(float) ? FLT_MANT_DIG \ | |
152 | : (sizeof(_type) == sizeof(double) ? DBL_MANT_DIG \ | |
d3ed854b | 153 | : 0)) |
20f1eee7 MD |
154 | |
155 | #define __type_float(_type) \ | |
156 | { \ | |
46d52200 ZT |
157 | .atype = atype_float, \ |
158 | .u = \ | |
20f1eee7 | 159 | { \ |
218deb69 | 160 | ._float = \ |
46d52200 | 161 | { \ |
218deb69 MD |
162 | .exp_dig = sizeof(_type) * CHAR_BIT \ |
163 | - _float_mant_dig(_type), \ | |
164 | .mant_dig = _float_mant_dig(_type), \ | |
165 | .alignment = lttng_alignof(_type) * CHAR_BIT, \ | |
166 | .reverse_byte_order = BYTE_ORDER != FLOAT_WORD_ORDER, \ | |
46d52200 | 167 | } \ |
218deb69 | 168 | } \ |
20f1eee7 MD |
169 | } \ |
170 | ||
37d5e202 | 171 | #define LTTNG_UST_FLOAT_TYPE_PADDING 24 |
20f1eee7 MD |
172 | struct lttng_float_type { |
173 | unsigned int exp_dig; /* exponent digits, in bits */ | |
174 | unsigned int mant_dig; /* mantissa digits, in bits */ | |
175 | unsigned short alignment; /* in bits */ | |
176 | unsigned int reverse_byte_order:1; | |
37d5e202 | 177 | char padding[LTTNG_UST_FLOAT_TYPE_PADDING]; |
20f1eee7 MD |
178 | }; |
179 | ||
218deb69 | 180 | /* legacy */ |
37d5e202 | 181 | #define LTTNG_UST_BASIC_TYPE_PADDING 128 |
8020ceb5 | 182 | union _lttng_basic_type { |
218deb69 | 183 | struct lttng_integer_type integer; /* legacy */ |
8020ceb5 | 184 | struct { |
c785c634 MD |
185 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ |
186 | struct lttng_integer_type container_type; | |
218deb69 | 187 | } enumeration; /* legacy */ |
8020ceb5 MD |
188 | struct { |
189 | enum lttng_string_encodings encoding; | |
218deb69 MD |
190 | } string; /* legacy */ |
191 | struct lttng_float_type _float; /* legacy */ | |
37d5e202 | 192 | char padding[LTTNG_UST_BASIC_TYPE_PADDING]; |
8020ceb5 MD |
193 | }; |
194 | ||
218deb69 | 195 | /* legacy */ |
8020ceb5 | 196 | struct lttng_basic_type { |
7dd08bec | 197 | enum lttng_abstract_types atype; |
8020ceb5 MD |
198 | union { |
199 | union _lttng_basic_type basic; | |
200 | } u; | |
201 | }; | |
202 | ||
37d5e202 | 203 | #define LTTNG_UST_TYPE_PADDING 128 |
8020ceb5 | 204 | struct lttng_type { |
7dd08bec | 205 | enum lttng_abstract_types atype; |
8020ceb5 | 206 | union { |
218deb69 MD |
207 | /* provider ABI 2.0 */ |
208 | struct lttng_integer_type integer; | |
209 | struct lttng_float_type _float; | |
210 | struct { | |
211 | enum lttng_string_encodings encoding; | |
212 | } string; | |
213 | struct { | |
214 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ | |
215 | struct lttng_type *container_type; | |
216 | } enum_nestable; | |
8020ceb5 | 217 | struct { |
218deb69 MD |
218 | const struct lttng_type *elem_type; |
219 | unsigned int length; /* Num. elems. */ | |
220 | unsigned int alignment; | |
221 | } array_nestable; | |
8020ceb5 | 222 | struct { |
218deb69 MD |
223 | const char *length_name; /* Length field name. */ |
224 | const struct lttng_type *elem_type; | |
225 | unsigned int alignment; /* Alignment before elements. */ | |
226 | } sequence_nestable; | |
53569322 | 227 | struct { |
218deb69 MD |
228 | unsigned int nr_fields; |
229 | const struct lttng_event_field *fields; /* Array of fields. */ | |
230 | unsigned int alignment; | |
231 | } struct_nestable; | |
232 | ||
233 | union { | |
234 | /* legacy provider ABI 1.0 */ | |
235 | union _lttng_basic_type basic; /* legacy */ | |
236 | struct { | |
237 | struct lttng_basic_type elem_type; | |
238 | unsigned int length; /* Num. elems. */ | |
239 | } array; /* legacy */ | |
240 | struct { | |
241 | struct lttng_basic_type length_type; | |
242 | struct lttng_basic_type elem_type; | |
243 | } sequence; /* legacy */ | |
244 | struct { | |
245 | unsigned int nr_fields; | |
246 | struct lttng_event_field *fields; /* Array of fields. */ | |
247 | } _struct; /* legacy */ | |
248 | } legacy; | |
37d5e202 | 249 | char padding[LTTNG_UST_TYPE_PADDING]; |
8020ceb5 MD |
250 | } u; |
251 | }; | |
252 | ||
37d5e202 | 253 | #define LTTNG_UST_ENUM_TYPE_PADDING 24 |
c785c634 | 254 | struct lttng_enum_desc { |
8020ceb5 | 255 | const char *name; |
8020ceb5 | 256 | const struct lttng_enum_entry *entries; |
c785c634 | 257 | unsigned int nr_entries; |
37d5e202 | 258 | char padding[LTTNG_UST_ENUM_TYPE_PADDING]; |
8020ceb5 MD |
259 | }; |
260 | ||
180901e6 MD |
261 | /* |
262 | * Event field description | |
263 | * | |
264 | * IMPORTANT: this structure is part of the ABI between the probe and | |
265 | * UST. Fields need to be only added at the end, never reordered, never | |
266 | * removed. | |
267 | */ | |
8020ceb5 | 268 | |
4774c8f3 | 269 | #define LTTNG_UST_EVENT_FIELD_PADDING 28 |
8020ceb5 MD |
270 | struct lttng_event_field { |
271 | const char *name; | |
272 | struct lttng_type type; | |
180901e6 | 273 | unsigned int nowrite; /* do not write into trace */ |
218deb69 MD |
274 | union { |
275 | struct { | |
276 | unsigned int nofilter:1; /* do not consider for filter */ | |
277 | } ext; | |
278 | char padding[LTTNG_UST_EVENT_FIELD_PADDING]; | |
279 | } u; | |
8020ceb5 MD |
280 | }; |
281 | ||
53569322 MD |
282 | enum lttng_ust_dynamic_type { |
283 | LTTNG_UST_DYNAMIC_TYPE_NONE, | |
284 | LTTNG_UST_DYNAMIC_TYPE_S8, | |
285 | LTTNG_UST_DYNAMIC_TYPE_S16, | |
286 | LTTNG_UST_DYNAMIC_TYPE_S32, | |
287 | LTTNG_UST_DYNAMIC_TYPE_S64, | |
288 | LTTNG_UST_DYNAMIC_TYPE_U8, | |
289 | LTTNG_UST_DYNAMIC_TYPE_U16, | |
290 | LTTNG_UST_DYNAMIC_TYPE_U32, | |
291 | LTTNG_UST_DYNAMIC_TYPE_U64, | |
292 | LTTNG_UST_DYNAMIC_TYPE_FLOAT, | |
293 | LTTNG_UST_DYNAMIC_TYPE_DOUBLE, | |
294 | LTTNG_UST_DYNAMIC_TYPE_STRING, | |
295 | _NR_LTTNG_UST_DYNAMIC_TYPES, | |
296 | }; | |
297 | ||
298 | struct lttng_ctx_value { | |
299 | enum lttng_ust_dynamic_type sel; | |
300 | union { | |
301 | int64_t s64; | |
86133caf | 302 | uint64_t u64; |
53569322 MD |
303 | const char *str; |
304 | double d; | |
305 | } u; | |
77aa5901 MD |
306 | }; |
307 | ||
d58d1454 MD |
308 | struct lttng_perf_counter_field; |
309 | ||
37d5e202 | 310 | #define LTTNG_UST_CTX_FIELD_PADDING 40 |
8020ceb5 MD |
311 | struct lttng_ctx_field { |
312 | struct lttng_event_field event_field; | |
53569322 | 313 | size_t (*get_size)(struct lttng_ctx_field *field, size_t offset); |
8020ceb5 | 314 | void (*record)(struct lttng_ctx_field *field, |
4cfec15c | 315 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 316 | struct lttng_channel *chan); |
77aa5901 | 317 | void (*get_value)(struct lttng_ctx_field *field, |
53569322 | 318 | struct lttng_ctx_value *value); |
8020ceb5 | 319 | union { |
d58d1454 | 320 | struct lttng_perf_counter_field *perf_counter; |
37d5e202 | 321 | char padding[LTTNG_UST_CTX_FIELD_PADDING]; |
8020ceb5 MD |
322 | } u; |
323 | void (*destroy)(struct lttng_ctx_field *field); | |
53569322 | 324 | char *field_name; /* Has ownership, dynamically allocated. */ |
8020ceb5 MD |
325 | }; |
326 | ||
b2cc986a | 327 | #define LTTNG_UST_CTX_PADDING 20 |
8020ceb5 MD |
328 | struct lttng_ctx { |
329 | struct lttng_ctx_field *fields; | |
330 | unsigned int nr_fields; | |
331 | unsigned int allocated_fields; | |
b2cc986a | 332 | unsigned int largest_align; |
37d5e202 MD |
333 | char padding[LTTNG_UST_CTX_PADDING]; |
334 | }; | |
335 | ||
336 | #define LTTNG_UST_EVENT_DESC_PADDING 40 | |
337 | struct lttng_event_desc { | |
338 | const char *name; | |
07a3a0d5 | 339 | void (*probe_callback)(void); /* store-event and count-event probe */ |
37d5e202 MD |
340 | const struct lttng_event_ctx *ctx; /* context */ |
341 | const struct lttng_event_field *fields; /* event payload */ | |
342 | unsigned int nr_fields; | |
343 | const int **loglevel; | |
68755429 | 344 | const char *signature; /* Argument types/names received */ |
6ddc916d MD |
345 | union { |
346 | struct { | |
347 | const char **model_emf_uri; | |
d8d2416d | 348 | void (*event_notifier_callback)(void); |
6ddc916d MD |
349 | } ext; |
350 | char padding[LTTNG_UST_EVENT_DESC_PADDING]; | |
351 | } u; | |
37d5e202 MD |
352 | }; |
353 | ||
71d31690 | 354 | #define LTTNG_UST_PROBE_DESC_PADDING 12 |
37d5e202 MD |
355 | struct lttng_probe_desc { |
356 | const char *provider; | |
357 | const struct lttng_event_desc **event_desc; | |
358 | unsigned int nr_events; | |
359 | struct cds_list_head head; /* chain registered probes */ | |
6715d7d1 MD |
360 | struct cds_list_head lazy_init_head; |
361 | int lazy; /* lazy registration */ | |
71d31690 MD |
362 | uint32_t major; |
363 | uint32_t minor; | |
37d5e202 | 364 | char padding[LTTNG_UST_PROBE_DESC_PADDING]; |
8020ceb5 MD |
365 | }; |
366 | ||
37d5e202 MD |
367 | /* Data structures used by the tracer. */ |
368 | ||
e450e339 FD |
369 | enum lttng_enabler_format_type { |
370 | LTTNG_ENABLER_FORMAT_STAR_GLOB, | |
371 | LTTNG_ENABLER_FORMAT_EVENT, | |
e6c12e3d MD |
372 | }; |
373 | ||
c8fcf224 MD |
374 | struct tp_list_entry { |
375 | struct lttng_ust_tracepoint_iter tp; | |
376 | struct cds_list_head head; | |
377 | }; | |
378 | ||
379 | struct lttng_ust_tracepoint_list { | |
380 | struct tp_list_entry *iter; | |
381 | struct cds_list_head head; | |
8020ceb5 MD |
382 | }; |
383 | ||
06d4f27e MD |
384 | struct tp_field_list_entry { |
385 | struct lttng_ust_field_iter field; | |
386 | struct cds_list_head head; | |
387 | }; | |
388 | ||
389 | struct lttng_ust_field_list { | |
390 | struct tp_field_list_entry *iter; | |
391 | struct cds_list_head head; | |
392 | }; | |
393 | ||
8165c8da | 394 | struct ust_pending_probe; |
7dd08bec | 395 | struct lttng_event; |
f488575f | 396 | |
8a92ed2a | 397 | /* |
04aa13f8 | 398 | * Bytecode interpreter return value masks. |
8a92ed2a | 399 | */ |
04aa13f8 FD |
400 | enum lttng_bytecode_interpreter_ret { |
401 | LTTNG_INTERPRETER_DISCARD = 0, | |
402 | LTTNG_INTERPRETER_RECORD_FLAG = (1ULL << 0), | |
8a92ed2a MD |
403 | /* Other bits are kept for future use. */ |
404 | }; | |
405 | ||
d37ecb3f FD |
406 | struct lttng_interpreter_output; |
407 | ||
73d37531 FD |
408 | /* |
409 | * This structure is used in the probes. More specifically, the `filter` and | |
410 | * `node` fields are explicity used in the probes. When modifying this | |
411 | * structure we must not change the layout of these two fields as it is | |
412 | * considered ABI. | |
413 | */ | |
f488575f MD |
414 | struct lttng_bytecode_runtime { |
415 | /* Associated bytecode */ | |
ab249ecf | 416 | struct lttng_ust_bytecode_node *bc; |
c42416df FD |
417 | union { |
418 | uint64_t (*filter)(void *interpreter_data, | |
419 | const char *interpreter_stack_data); | |
d37ecb3f FD |
420 | uint64_t (*capture)(void *interpreter_data, |
421 | const char *interpreter_stack_data, | |
422 | struct lttng_interpreter_output *interpreter_output); | |
c42416df | 423 | } interpreter_funcs; |
21af05a9 | 424 | int link_failed; |
e58095ef | 425 | struct cds_list_head node; /* list of bytecode runtime in event */ |
b77aaa1b | 426 | /* |
d8d2416d FD |
427 | * Pointer to a URCU-protected pointer owned by an `struct |
428 | * lttng_session`or `struct lttng_event_notifier_group`. | |
b77aaa1b FD |
429 | */ |
430 | struct lttng_ctx **pctx; | |
e58095ef MD |
431 | }; |
432 | ||
433 | /* | |
d8d2416d FD |
434 | * Objects in a linked-list of enablers, owned by an event or event_notifier. |
435 | * This is used because an event (or a event_notifier) can be enabled by more | |
436 | * than one enabler and we want a quick way to iterate over all enablers of an | |
437 | * object. | |
438 | * | |
439 | * For example, event rules "my_app:a*" and "my_app:ab*" will both match the | |
440 | * event with the name "my_app:abc". | |
e58095ef MD |
441 | */ |
442 | struct lttng_enabler_ref { | |
443 | struct cds_list_head node; /* enabler ref list */ | |
444 | struct lttng_enabler *ref; /* backward ref */ | |
f488575f | 445 | }; |
8165c8da | 446 | |
07a3a0d5 MD |
447 | enum lttng_event_container_type { |
448 | LTTNG_EVENT_CONTAINER_CHANNEL, | |
449 | LTTNG_EVENT_CONTAINER_COUNTER, | |
450 | }; | |
451 | ||
452 | enum lttng_key_token_type { | |
453 | LTTNG_KEY_TOKEN_STRING = 0, | |
454 | LTTNG_KEY_TOKEN_EVENT_NAME = 1, | |
455 | LTTNG_KEY_TOKEN_PROVIDER_NAME = 2, | |
456 | }; | |
457 | ||
458 | #define LTTNG_KEY_TOKEN_STRING_LEN_MAX LTTNG_UST_KEY_TOKEN_STRING_LEN_MAX | |
459 | struct lttng_key_token { | |
460 | enum lttng_key_token_type type; | |
461 | union { | |
462 | char string[LTTNG_KEY_TOKEN_STRING_LEN_MAX]; | |
463 | } arg; | |
464 | }; | |
465 | ||
466 | #define LTTNG_NR_KEY_TOKEN LTTNG_UST_NR_KEY_TOKEN | |
467 | struct lttng_counter_key_dimension { | |
468 | size_t nr_key_tokens; | |
469 | struct lttng_key_token key_tokens[LTTNG_UST_NR_KEY_TOKEN]; | |
470 | }; | |
471 | ||
472 | #define LTTNG_COUNTER_DIMENSION_MAX LTTNG_UST_COUNTER_DIMENSION_MAX | |
473 | struct lttng_counter_key { | |
474 | size_t nr_dimensions; | |
475 | struct lttng_counter_key_dimension key_dimensions[LTTNG_COUNTER_DIMENSION_MAX]; | |
476 | }; | |
477 | ||
8020ceb5 | 478 | /* |
7dd08bec MD |
479 | * lttng_event structure is referred to by the tracing fast path. It |
480 | * must be kept small. | |
180901e6 MD |
481 | * |
482 | * IMPORTANT: this structure is part of the ABI between the probe and | |
483 | * UST. Fields need to be only added at the end, never reordered, never | |
484 | * removed. | |
8020ceb5 | 485 | */ |
7dd08bec | 486 | struct lttng_event { |
8020ceb5 | 487 | unsigned int id; |
07a3a0d5 | 488 | struct lttng_channel *chan; /* for backward compatibility */ |
976fe9ea | 489 | int enabled; |
8020ceb5 | 490 | const struct lttng_event_desc *desc; |
8020ceb5 | 491 | struct lttng_ctx *ctx; |
9f3fdbc6 | 492 | enum lttng_ust_instrumentation instrumentation; |
e58095ef | 493 | struct cds_list_head node; /* Event list in session */ |
e58095ef | 494 | |
e58095ef | 495 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
a56fd376 | 496 | struct cds_list_head filter_bytecode_runtime_head; |
dcdeaff0 | 497 | int has_enablers_without_bytecode; |
e58095ef MD |
498 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
499 | struct cds_list_head enablers_ref_head; | |
07a3a0d5 MD |
500 | struct cds_hlist_node name_hlist; /* session ht of events, per event name */ |
501 | int registered; /* has reg'd tracepoint probe */ | |
502 | ||
503 | /* LTTng-UST 2.14 starts here */ | |
504 | uint64_t counter_index; /* counter index */ | |
505 | struct lttng_event_container *container; | |
506 | struct cds_hlist_node key_hlist; /* session ht of events, per key */ | |
507 | char key[LTTNG_KEY_TOKEN_STRING_LEN_MAX]; | |
508 | /* | |
509 | * For non-coalesce-hit event containers, each events is | |
510 | * associated with a single event enabler token. | |
511 | */ | |
512 | uint64_t user_token; | |
8020ceb5 MD |
513 | }; |
514 | ||
d8d2416d FD |
515 | struct lttng_event_notifier { |
516 | uint64_t user_token; | |
6566528b | 517 | uint64_t error_counter_index; |
d8d2416d FD |
518 | int enabled; |
519 | int registered; /* has reg'd tracepoint probe */ | |
d37ecb3f | 520 | size_t num_captures; /* Needed to allocate the msgpack array. */ |
cab88ff8 MD |
521 | void (*notification_send)(struct lttng_event_notifier *event_notifier, |
522 | const char *stack_data); | |
d8d2416d | 523 | struct cds_list_head filter_bytecode_runtime_head; |
d37ecb3f | 524 | struct cds_list_head capture_bytecode_runtime_head; |
d8d2416d FD |
525 | int has_enablers_without_bytecode; |
526 | struct cds_list_head enablers_ref_head; | |
527 | const struct lttng_event_desc *desc; | |
528 | struct cds_hlist_node hlist; /* hashtable of event_notifiers */ | |
529 | struct cds_list_head node; /* event_notifier list in session */ | |
530 | struct lttng_event_notifier_group *group; /* weak ref */ | |
531 | }; | |
532 | ||
c785c634 MD |
533 | struct lttng_enum { |
534 | const struct lttng_enum_desc *desc; | |
535 | struct lttng_session *session; | |
536 | struct cds_list_head node; /* Enum list in session */ | |
537 | struct cds_hlist_node hlist; /* Session ht of enums */ | |
538 | uint64_t id; /* Enumeration ID in sessiond */ | |
539 | }; | |
540 | ||
8d8a24c8 | 541 | struct channel; |
38fae1d3 | 542 | struct lttng_ust_shm_handle; |
8d8a24c8 | 543 | |
180901e6 MD |
544 | /* |
545 | * IMPORTANT: this structure is part of the ABI between the probe and | |
546 | * UST. Fields need to be only added at the end, never reordered, never | |
547 | * removed. | |
548 | */ | |
7dd08bec MD |
549 | struct lttng_channel_ops { |
550 | struct lttng_channel *(*channel_create)(const char *name, | |
74d81a6c MD |
551 | void *buf_addr, |
552 | size_t subbuf_size, size_t num_subbuf, | |
553 | unsigned int switch_timer_interval, | |
554 | unsigned int read_timer_interval, | |
6ca18e66 | 555 | unsigned char *uuid, |
a9ff648c | 556 | uint32_t chan_id, |
b2c5f61a MD |
557 | const int *stream_fds, int nr_stream_fds, |
558 | int64_t blocking_timeout); | |
74d81a6c | 559 | void (*channel_destroy)(struct lttng_channel *chan); |
4cfec15c | 560 | int (*event_reserve)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
8020ceb5 | 561 | uint32_t event_id); |
4cfec15c | 562 | void (*event_commit)(struct lttng_ust_lib_ring_buffer_ctx *ctx); |
74d81a6c MD |
563 | void (*event_write)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
564 | const void *src, size_t len); | |
8020ceb5 MD |
565 | /* |
566 | * packet_avail_size returns the available size in the current | |
567 | * packet. Note that the size returned is only a hint, since it | |
568 | * may change due to concurrent writes. | |
569 | */ | |
1d498196 | 570 | size_t (*packet_avail_size)(struct channel *chan, |
38fae1d3 | 571 | struct lttng_ust_shm_handle *handle); |
8020ceb5 MD |
572 | int (*is_finalized)(struct channel *chan); |
573 | int (*is_disabled)(struct channel *chan); | |
38fae1d3 | 574 | int (*flush_buffer)(struct channel *chan, struct lttng_ust_shm_handle *handle); |
a44c74d9 MD |
575 | void (*event_strcpy)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
576 | const char *src, size_t len); | |
8020ceb5 MD |
577 | }; |
578 | ||
07a3a0d5 MD |
579 | /* |
580 | * This structure is ABI with the tracepoint probes, and must preserve | |
581 | * backward compatibility. Fields can only be added at the end, and | |
582 | * never removed nor reordered. | |
583 | */ | |
584 | struct lttng_event_container { | |
585 | enum lttng_event_container_type type; | |
586 | int objd; | |
587 | struct lttng_session *session; /* Session containing the container */ | |
588 | int enabled; | |
589 | unsigned int tstate:1; /* Transient enable state */ | |
590 | bool coalesce_hits; | |
591 | }; | |
592 | ||
180901e6 MD |
593 | /* |
594 | * IMPORTANT: this structure is part of the ABI between the probe and | |
595 | * UST. Fields need to be only added at the end, never reordered, never | |
596 | * removed. | |
597 | */ | |
7dd08bec | 598 | struct lttng_channel { |
a3f61e7f MD |
599 | /* |
600 | * The pointers located in this private data are NOT safe to be | |
601 | * dereferenced by the consumer. The only operations the | |
602 | * consumer process is designed to be allowed to do is to read | |
603 | * and perform subbuffer flush. | |
604 | */ | |
8020ceb5 | 605 | struct channel *chan; /* Channel buffers */ |
07a3a0d5 | 606 | int enabled; /* For backward compatibility */ |
8020ceb5 MD |
607 | struct lttng_ctx *ctx; |
608 | /* Event ID management */ | |
07a3a0d5 | 609 | struct lttng_session *session; /* For backward compatibility */ |
0a42beb6 | 610 | int objd; /* Object associated to channel */ |
e58095ef | 611 | struct cds_list_head node; /* Channel list in session */ |
74d81a6c | 612 | const struct lttng_channel_ops *ops; |
8020ceb5 | 613 | int header_type; /* 0: unset, 1: compact, 2: large */ |
38fae1d3 | 614 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ |
a3f61e7f | 615 | |
74d81a6c | 616 | /* Channel ID */ |
a3f61e7f | 617 | unsigned int id; |
74d81a6c | 618 | enum lttng_ust_chan_type type; |
19d8b1b3 | 619 | unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */ |
07a3a0d5 | 620 | int _deprecated:1; |
8020ceb5 | 621 | |
07a3a0d5 | 622 | struct lttng_event_container parent; |
ebabbf58 MD |
623 | }; |
624 | ||
625 | struct lttng_counter_ops { | |
626 | struct lib_counter *(*counter_create)(size_t nr_dimensions, | |
07a3a0d5 | 627 | const size_t *dimensions, |
ebabbf58 MD |
628 | int64_t global_sum_step, |
629 | int global_counter_fd, | |
630 | int nr_counter_cpu_fds, | |
631 | const int *counter_cpu_fds, | |
632 | bool is_daemon); | |
633 | void (*counter_destroy)(struct lib_counter *counter); | |
634 | int (*counter_add)(struct lib_counter *counter, | |
635 | const size_t *dimension_indexes, int64_t v); | |
636 | int (*counter_read)(struct lib_counter *counter, | |
637 | const size_t *dimension_indexes, int cpu, | |
638 | int64_t *value, bool *overflow, bool *underflow); | |
639 | int (*counter_aggregate)(struct lib_counter *counter, | |
640 | const size_t *dimension_indexes, int64_t *value, | |
641 | bool *overflow, bool *underflow); | |
642 | int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes); | |
643 | }; | |
644 | ||
53569322 MD |
645 | #define LTTNG_UST_STACK_CTX_PADDING 32 |
646 | struct lttng_stack_ctx { | |
647 | struct lttng_event *event; | |
648 | struct lttng_ctx *chan_ctx; /* RCU dereferenced. */ | |
649 | struct lttng_ctx *event_ctx; /* RCU dereferenced. */ | |
650 | char padding[LTTNG_UST_STACK_CTX_PADDING]; | |
651 | }; | |
652 | ||
71a9d034 | 653 | #define LTTNG_UST_EVENT_HT_BITS 12 |
e58095ef MD |
654 | #define LTTNG_UST_EVENT_HT_SIZE (1U << LTTNG_UST_EVENT_HT_BITS) |
655 | ||
656 | struct lttng_ust_event_ht { | |
657 | struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE]; | |
658 | }; | |
659 | ||
d8d2416d FD |
660 | #define LTTNG_UST_EVENT_NOTIFIER_HT_BITS 12 |
661 | #define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS) | |
662 | struct lttng_ust_event_notifier_ht { | |
663 | struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE]; | |
664 | }; | |
665 | ||
c785c634 MD |
666 | #define LTTNG_UST_ENUM_HT_BITS 12 |
667 | #define LTTNG_UST_ENUM_HT_SIZE (1U << LTTNG_UST_ENUM_HT_BITS) | |
668 | ||
669 | struct lttng_ust_enum_ht { | |
670 | struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE]; | |
671 | }; | |
672 | ||
180901e6 MD |
673 | /* |
674 | * IMPORTANT: this structure is part of the ABI between the probe and | |
675 | * UST. Fields need to be only added at the end, never reordered, never | |
676 | * removed. | |
677 | */ | |
7dd08bec | 678 | struct lttng_session { |
e58095ef MD |
679 | int active; /* Is trace session active ? */ |
680 | int been_active; /* Been active ? */ | |
681 | int objd; /* Object associated */ | |
e58095ef MD |
682 | struct cds_list_head chan_head; /* Channel list head */ |
683 | struct cds_list_head events_head; /* list of events */ | |
e58095ef | 684 | struct cds_list_head node; /* Session list */ |
e58095ef MD |
685 | |
686 | /* New UST 2.1 */ | |
687 | /* List of enablers */ | |
688 | struct cds_list_head enablers_head; | |
07a3a0d5 MD |
689 | /* hash table of events, indexed by name */ |
690 | struct lttng_ust_event_ht events_name_ht; | |
32ce8569 | 691 | void *owner; /* object owner */ |
ac6b4ac6 | 692 | int tstate:1; /* Transient enable state */ |
246be17e PW |
693 | |
694 | /* New UST 2.4 */ | |
695 | int statedump_pending:1; | |
c785c634 MD |
696 | |
697 | /* New UST 2.8 */ | |
698 | struct lttng_ust_enum_ht enums_ht; /* ht of enumerations */ | |
699 | struct cds_list_head enums_head; | |
53569322 | 700 | struct lttng_ctx *ctx; /* contexts for filters. */ |
07a3a0d5 MD |
701 | |
702 | /* New UST 2.14 */ | |
703 | struct cds_list_head counters; /* Counters list */ | |
704 | /* hash table of events, indexed by key */ | |
705 | struct lttng_ust_event_ht events_key_ht; | |
8020ceb5 MD |
706 | }; |
707 | ||
ebabbf58 | 708 | struct lttng_counter { |
07a3a0d5 MD |
709 | struct lttng_event_container parent; |
710 | union { | |
711 | struct lttng_event_notifier_group *event_notifier_group; | |
712 | struct lttng_session *session; | |
713 | } owner; | |
ebabbf58 MD |
714 | struct lttng_counter_transport *transport; |
715 | struct lib_counter *counter; | |
716 | struct lttng_counter_ops *ops; | |
07a3a0d5 MD |
717 | struct cds_list_head node; /* Counter list (in session) */ |
718 | size_t free_index; /* Next index to allocate */ | |
ebabbf58 MD |
719 | }; |
720 | ||
d8d2416d FD |
721 | struct lttng_event_notifier_group { |
722 | int objd; | |
723 | void *owner; | |
724 | int notification_fd; | |
725 | struct cds_list_head node; /* Event notifier group handle list */ | |
726 | struct cds_list_head enablers_head; | |
727 | struct cds_list_head event_notifiers_head; /* list of event_notifiers */ | |
728 | struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */ | |
729 | struct lttng_ctx *ctx; /* contexts for filters. */ | |
ebabbf58 MD |
730 | |
731 | struct lttng_counter *error_counter; | |
732 | size_t error_counter_len; | |
d8d2416d FD |
733 | }; |
734 | ||
7dd08bec | 735 | struct lttng_transport { |
8020ceb5 | 736 | char *name; |
9f3fdbc6 | 737 | struct cds_list_head node; |
7dd08bec | 738 | struct lttng_channel_ops ops; |
74d81a6c | 739 | const struct lttng_ust_lib_ring_buffer_config *client_config; |
8020ceb5 MD |
740 | }; |
741 | ||
ebabbf58 MD |
742 | struct lttng_counter_transport { |
743 | char *name; | |
744 | struct cds_list_head node; | |
745 | struct lttng_counter_ops ops; | |
746 | const struct lib_counter_config *client_config; | |
747 | }; | |
748 | ||
7dd08bec MD |
749 | struct lttng_session *lttng_session_create(void); |
750 | int lttng_session_enable(struct lttng_session *session); | |
751 | int lttng_session_disable(struct lttng_session *session); | |
710b8ee3 | 752 | int lttng_session_statedump(struct lttng_session *session); |
7dd08bec | 753 | void lttng_session_destroy(struct lttng_session *session); |
8020ceb5 | 754 | |
07a3a0d5 MD |
755 | int lttng_event_container_enable(struct lttng_event_container *container); |
756 | int lttng_event_container_disable(struct lttng_event_container *container); | |
e58095ef | 757 | |
e58095ef | 758 | int lttng_attach_context(struct lttng_ust_context *context_param, |
8e696cfa | 759 | union ust_args *uargs, |
e58095ef | 760 | struct lttng_ctx **ctx, struct lttng_session *session); |
7dd08bec MD |
761 | void lttng_transport_register(struct lttng_transport *transport); |
762 | void lttng_transport_unregister(struct lttng_transport *transport); | |
8020ceb5 | 763 | |
07a3a0d5 MD |
764 | void lttng_counter_transport_register(struct lttng_counter_transport *transport); |
765 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport); | |
766 | ||
7dd08bec MD |
767 | int lttng_probe_register(struct lttng_probe_desc *desc); |
768 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
35ac38cb | 769 | void lttng_probe_provider_unregister_events(struct lttng_probe_desc *desc); |
5f733922 | 770 | int lttng_fix_pending_events(void); |
7dd08bec MD |
771 | int lttng_probes_init(void); |
772 | void lttng_probes_exit(void); | |
8173ec7c | 773 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
77aa5901 | 774 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8173ec7c | 775 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p); |
b2cc986a | 776 | void lttng_context_update(struct lttng_ctx *ctx); |
8173ec7c | 777 | void lttng_remove_context_field(struct lttng_ctx **ctx_p, |
8020ceb5 MD |
778 | struct lttng_ctx_field *field); |
779 | void lttng_destroy_context(struct lttng_ctx *ctx); | |
3b402b40 | 780 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); |
c1ef86f0 | 781 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
8173ec7c | 782 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx); |
4847e9bb | 783 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
96f85541 | 784 | int lttng_add_ip_to_ctx(struct lttng_ctx **ctx); |
c7ea8487 | 785 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
53569322 | 786 | int lttng_add_dyntest_to_ctx(struct lttng_ctx **ctx); |
735bef47 MJ |
787 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); |
788 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); | |
789 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); | |
790 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); | |
791 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); | |
792 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); | |
793 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); | |
fca2f191 MJ |
794 | int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); |
795 | int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); | |
796 | int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); | |
797 | int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); | |
798 | int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); | |
799 | int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); | |
a93bfc45 | 800 | void lttng_context_vtid_reset(void); |
c1ef86f0 | 801 | void lttng_context_vpid_reset(void); |
46228a6f | 802 | void lttng_context_procname_reset(void); |
735bef47 MJ |
803 | void lttng_context_cgroup_ns_reset(void); |
804 | void lttng_context_ipc_ns_reset(void); | |
805 | void lttng_context_mnt_ns_reset(void); | |
806 | void lttng_context_net_ns_reset(void); | |
807 | void lttng_context_pid_ns_reset(void); | |
808 | void lttng_context_user_ns_reset(void); | |
809 | void lttng_context_uts_ns_reset(void); | |
fca2f191 MJ |
810 | void lttng_context_vuid_reset(void); |
811 | void lttng_context_veuid_reset(void); | |
812 | void lttng_context_vsuid_reset(void); | |
813 | void lttng_context_vgid_reset(void); | |
814 | void lttng_context_vegid_reset(void); | |
815 | void lttng_context_vsgid_reset(void); | |
9f3fdbc6 | 816 | |
d58d1454 MD |
817 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
818 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
819 | uint64_t config, | |
820 | const char *name, | |
821 | struct lttng_ctx **ctx); | |
822 | int lttng_perf_counter_init(void); | |
823 | void lttng_perf_counter_exit(void); | |
824 | #else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */ | |
825 | static inline | |
826 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
827 | uint64_t config, | |
828 | const char *name, | |
829 | struct lttng_ctx **ctx) | |
830 | { | |
831 | return -ENOSYS; | |
832 | } | |
833 | static inline | |
834 | int lttng_perf_counter_init(void) | |
835 | { | |
836 | return 0; | |
837 | } | |
838 | static inline | |
839 | void lttng_perf_counter_exit(void) | |
840 | { | |
841 | } | |
842 | #endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */ | |
843 | ||
82b9bde8 JD |
844 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_metadata; |
845 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_discard; | |
846 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_overwrite; | |
c1fca457 | 847 | |
7dd08bec | 848 | struct lttng_transport *lttng_transport_find(const char *name); |
c1fca457 | 849 | |
7dd08bec MD |
850 | int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list); |
851 | void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list); | |
c8fcf224 MD |
852 | struct lttng_ust_tracepoint_iter * |
853 | lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list); | |
7dd08bec MD |
854 | int lttng_probes_get_field_list(struct lttng_ust_field_list *list); |
855 | void lttng_probes_prune_field_list(struct lttng_ust_field_list *list); | |
06d4f27e MD |
856 | struct lttng_ust_field_iter * |
857 | lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list); | |
c8fcf224 | 858 | |
7dd08bec | 859 | void lttng_free_event_filter_runtime(struct lttng_event *event); |
e58095ef MD |
860 | |
861 | struct cds_list_head *lttng_get_probe_list_head(void); | |
6715d7d1 | 862 | int lttng_session_active(void); |
e6c12e3d | 863 | |
246be17e | 864 | typedef int (*t_statedump_func_ptr)(struct lttng_session *session); |
3327ac33 | 865 | void lttng_handle_pending_statedump(void *owner); |
37dddb65 | 866 | struct cds_list_head *_lttng_get_sessions(void); |
b33b46f7 FD |
867 | |
868 | struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, | |
869 | const struct lttng_enum_desc *enum_desc); | |
246be17e | 870 | |
97c7c238 | 871 | void lttng_ust_dl_update(void *ip); |
6548fca4 | 872 | void lttng_ust_fixup_fd_tracker_tls(void); |
97c7c238 | 873 | |
07a3a0d5 MD |
874 | static inline |
875 | struct lttng_event_container *lttng_channel_get_event_container(struct lttng_channel *channel) | |
876 | { | |
877 | return &channel->parent; | |
878 | } | |
879 | ||
880 | static inline | |
881 | struct lttng_event_container *lttng_counter_get_event_container(struct lttng_counter *counter) | |
882 | { | |
883 | return &counter->parent; | |
884 | } | |
885 | ||
886 | static inline | |
887 | struct lttng_channel *lttng_event_container_get_channel(struct lttng_event_container *container) | |
888 | { | |
889 | if (container->type != LTTNG_EVENT_CONTAINER_CHANNEL) | |
890 | return NULL; | |
891 | return caa_container_of(container, struct lttng_channel, parent); | |
892 | } | |
893 | ||
894 | static inline | |
895 | struct lttng_counter *lttng_event_container_get_counter(struct lttng_event_container *container) | |
896 | { | |
897 | if (container->type != LTTNG_EVENT_CONTAINER_COUNTER) | |
898 | return NULL; | |
899 | return caa_container_of(container, struct lttng_counter, parent); | |
900 | } | |
901 | ||
6453d237 MD |
902 | #ifdef __cplusplus |
903 | } | |
904 | #endif | |
905 | ||
51489cad | 906 | #endif /* _LTTNG_UST_EVENTS_H */ |