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51489cad MD |
1 | #ifndef _LTTNG_UST_EVENTS_H |
2 | #define _LTTNG_UST_EVENTS_H | |
8020ceb5 MD |
3 | |
4 | /* | |
51489cad | 5 | * lttng/ust-events.h |
8020ceb5 | 6 | * |
e92f3e28 | 7 | * Copyright 2010-2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8020ceb5 MD |
8 | * |
9 | * Holds LTTng per-session event registry. | |
10 | * | |
e92f3e28 MD |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
a60d70e6 | 17 | * |
e92f3e28 MD |
18 | * The above copyright notice and this permission notice shall be included in |
19 | * all copies or substantial portions of the Software. | |
d2428e87 MD |
20 | * |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
8020ceb5 MD |
28 | */ |
29 | ||
9f3fdbc6 | 30 | #include <urcu/list.h> |
1f18504e | 31 | #include <urcu/hlist.h> |
b4051ad8 | 32 | #include <stddef.h> |
9f3fdbc6 | 33 | #include <stdint.h> |
d58d1454 | 34 | #include <lttng/ust-config.h> |
4318ae1b MD |
35 | #include <lttng/ust-abi.h> |
36 | #include <lttng/ust-tracer.h> | |
2ae57758 | 37 | #include <lttng/ust-endian.h> |
20f1eee7 | 38 | #include <float.h> |
d58d1454 MD |
39 | #include <errno.h> |
40 | #include <urcu/ref.h> | |
41 | #include <pthread.h> | |
8020ceb5 | 42 | |
db56acaf MD |
43 | #ifndef LTTNG_PACKED |
44 | #error "LTTNG_PACKED should be defined" | |
45 | #endif | |
46 | ||
6453d237 MD |
47 | #ifdef __cplusplus |
48 | extern "C" { | |
49 | #endif | |
50 | ||
19d8b1b3 MD |
51 | #define LTTNG_UST_UUID_LEN 16 |
52 | ||
71d31690 MD |
53 | /* |
54 | * Tracepoint provider version. Compatibility based on the major number. | |
55 | * Older tracepoint providers can always register to newer lttng-ust | |
56 | * library, but the opposite is rejected: a newer tracepoint provider is | |
57 | * rejected by an older lttng-ust library. | |
58 | */ | |
04f0b55a | 59 | #define LTTNG_UST_PROVIDER_MAJOR 2 |
71d31690 MD |
60 | #define LTTNG_UST_PROVIDER_MINOR 0 |
61 | ||
7dd08bec MD |
62 | struct lttng_channel; |
63 | struct lttng_session; | |
4cfec15c | 64 | struct lttng_ust_lib_ring_buffer_ctx; |
53569322 MD |
65 | struct lttng_ust_context_app; |
66 | struct lttng_event_field; | |
8020ceb5 | 67 | |
37d5e202 MD |
68 | /* |
69 | * Data structures used by tracepoint event declarations, and by the | |
70 | * tracer. Those structures have padding for future extension. | |
71 | */ | |
72 | ||
c1fca457 MD |
73 | /* |
74 | * LTTng client type enumeration. Used by the consumer to map the | |
75 | * callbacks from its own address space. | |
76 | */ | |
77 | enum lttng_client_types { | |
78 | LTTNG_CLIENT_METADATA = 0, | |
79 | LTTNG_CLIENT_DISCARD = 1, | |
80 | LTTNG_CLIENT_OVERWRITE = 2, | |
34a91bdb MD |
81 | LTTNG_CLIENT_DISCARD_RT = 3, |
82 | LTTNG_CLIENT_OVERWRITE_RT = 4, | |
c1fca457 MD |
83 | LTTNG_NR_CLIENT_TYPES, |
84 | }; | |
85 | ||
8020ceb5 MD |
86 | /* Type description */ |
87 | ||
88 | /* Update the astract_types name table in lttng-types.c along with this enum */ | |
7dd08bec | 89 | enum lttng_abstract_types { |
8020ceb5 | 90 | atype_integer, |
218deb69 MD |
91 | atype_enum, /* legacy */ |
92 | atype_array, /* legacy */ | |
93 | atype_sequence, /* legacy */ | |
8020ceb5 | 94 | atype_string, |
20f1eee7 | 95 | atype_float, |
53569322 | 96 | atype_dynamic, |
218deb69 MD |
97 | atype_struct, /* legacy */ |
98 | atype_enum_nestable, | |
99 | atype_array_nestable, | |
100 | atype_sequence_nestable, | |
101 | atype_struct_nestable, | |
8020ceb5 MD |
102 | NR_ABSTRACT_TYPES, |
103 | }; | |
104 | ||
105 | /* Update the string_encodings name table in lttng-types.c along with this enum */ | |
106 | enum lttng_string_encodings { | |
107 | lttng_encode_none = 0, | |
108 | lttng_encode_UTF8 = 1, | |
109 | lttng_encode_ASCII = 2, | |
110 | NR_STRING_ENCODINGS, | |
111 | }; | |
112 | ||
a6f80644 MD |
113 | struct lttng_enum_value { |
114 | unsigned long long value; | |
115 | unsigned int signedness:1; | |
116 | }; | |
117 | ||
3e762260 PP |
118 | enum lttng_enum_entry_options { |
119 | LTTNG_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0, | |
120 | }; | |
121 | ||
37d5e202 | 122 | #define LTTNG_UST_ENUM_ENTRY_PADDING 16 |
8020ceb5 | 123 | struct lttng_enum_entry { |
a6f80644 | 124 | struct lttng_enum_value start, end; /* start and end are inclusive */ |
8020ceb5 | 125 | const char *string; |
3e762260 PP |
126 | union { |
127 | struct { | |
128 | unsigned int options; | |
129 | } LTTNG_PACKED extra; | |
130 | char padding[LTTNG_UST_ENUM_ENTRY_PADDING]; | |
131 | } u; | |
8020ceb5 MD |
132 | }; |
133 | ||
134 | #define __type_integer(_type, _byte_order, _base, _encoding) \ | |
135 | { \ | |
46d52200 ZT |
136 | .atype = atype_integer, \ |
137 | .u = \ | |
8020ceb5 | 138 | { \ |
218deb69 | 139 | .integer = \ |
46d52200 | 140 | { \ |
218deb69 MD |
141 | .size = sizeof(_type) * CHAR_BIT, \ |
142 | .alignment = lttng_alignof(_type) * CHAR_BIT, \ | |
143 | .signedness = lttng_is_signed_type(_type), \ | |
144 | .reverse_byte_order = _byte_order != BYTE_ORDER, \ | |
145 | .base = _base, \ | |
146 | .encoding = lttng_encode_##_encoding, \ | |
46d52200 | 147 | } \ |
8020ceb5 MD |
148 | }, \ |
149 | } \ | |
150 | ||
37d5e202 | 151 | #define LTTNG_UST_INTEGER_TYPE_PADDING 24 |
8020ceb5 MD |
152 | struct lttng_integer_type { |
153 | unsigned int size; /* in bits */ | |
154 | unsigned short alignment; /* in bits */ | |
155 | unsigned int signedness:1; | |
156 | unsigned int reverse_byte_order:1; | |
157 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ | |
158 | enum lttng_string_encodings encoding; | |
37d5e202 | 159 | char padding[LTTNG_UST_INTEGER_TYPE_PADDING]; |
8020ceb5 MD |
160 | }; |
161 | ||
d3ed854b MD |
162 | /* |
163 | * Only float and double are supported. long double is not supported at | |
164 | * the moment. | |
165 | */ | |
20f1eee7 MD |
166 | #define _float_mant_dig(_type) \ |
167 | (sizeof(_type) == sizeof(float) ? FLT_MANT_DIG \ | |
168 | : (sizeof(_type) == sizeof(double) ? DBL_MANT_DIG \ | |
d3ed854b | 169 | : 0)) |
20f1eee7 MD |
170 | |
171 | #define __type_float(_type) \ | |
172 | { \ | |
46d52200 ZT |
173 | .atype = atype_float, \ |
174 | .u = \ | |
20f1eee7 | 175 | { \ |
218deb69 | 176 | ._float = \ |
46d52200 | 177 | { \ |
218deb69 MD |
178 | .exp_dig = sizeof(_type) * CHAR_BIT \ |
179 | - _float_mant_dig(_type), \ | |
180 | .mant_dig = _float_mant_dig(_type), \ | |
181 | .alignment = lttng_alignof(_type) * CHAR_BIT, \ | |
182 | .reverse_byte_order = BYTE_ORDER != FLOAT_WORD_ORDER, \ | |
46d52200 | 183 | } \ |
218deb69 | 184 | } \ |
20f1eee7 MD |
185 | } \ |
186 | ||
37d5e202 | 187 | #define LTTNG_UST_FLOAT_TYPE_PADDING 24 |
20f1eee7 MD |
188 | struct lttng_float_type { |
189 | unsigned int exp_dig; /* exponent digits, in bits */ | |
190 | unsigned int mant_dig; /* mantissa digits, in bits */ | |
191 | unsigned short alignment; /* in bits */ | |
192 | unsigned int reverse_byte_order:1; | |
37d5e202 | 193 | char padding[LTTNG_UST_FLOAT_TYPE_PADDING]; |
20f1eee7 MD |
194 | }; |
195 | ||
218deb69 | 196 | /* legacy */ |
37d5e202 | 197 | #define LTTNG_UST_BASIC_TYPE_PADDING 128 |
8020ceb5 | 198 | union _lttng_basic_type { |
218deb69 | 199 | struct lttng_integer_type integer; /* legacy */ |
8020ceb5 | 200 | struct { |
c785c634 MD |
201 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ |
202 | struct lttng_integer_type container_type; | |
218deb69 | 203 | } enumeration; /* legacy */ |
8020ceb5 MD |
204 | struct { |
205 | enum lttng_string_encodings encoding; | |
218deb69 MD |
206 | } string; /* legacy */ |
207 | struct lttng_float_type _float; /* legacy */ | |
37d5e202 | 208 | char padding[LTTNG_UST_BASIC_TYPE_PADDING]; |
8020ceb5 MD |
209 | }; |
210 | ||
218deb69 | 211 | /* legacy */ |
8020ceb5 | 212 | struct lttng_basic_type { |
7dd08bec | 213 | enum lttng_abstract_types atype; |
8020ceb5 MD |
214 | union { |
215 | union _lttng_basic_type basic; | |
216 | } u; | |
217 | }; | |
218 | ||
37d5e202 | 219 | #define LTTNG_UST_TYPE_PADDING 128 |
8020ceb5 | 220 | struct lttng_type { |
7dd08bec | 221 | enum lttng_abstract_types atype; |
8020ceb5 | 222 | union { |
218deb69 MD |
223 | /* provider ABI 2.0 */ |
224 | struct lttng_integer_type integer; | |
225 | struct lttng_float_type _float; | |
226 | struct { | |
227 | enum lttng_string_encodings encoding; | |
228 | } string; | |
229 | struct { | |
230 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ | |
231 | struct lttng_type *container_type; | |
232 | } enum_nestable; | |
8020ceb5 | 233 | struct { |
218deb69 MD |
234 | const struct lttng_type *elem_type; |
235 | unsigned int length; /* Num. elems. */ | |
236 | unsigned int alignment; | |
237 | } array_nestable; | |
8020ceb5 | 238 | struct { |
218deb69 MD |
239 | const char *length_name; /* Length field name. */ |
240 | const struct lttng_type *elem_type; | |
241 | unsigned int alignment; /* Alignment before elements. */ | |
242 | } sequence_nestable; | |
53569322 | 243 | struct { |
218deb69 MD |
244 | unsigned int nr_fields; |
245 | const struct lttng_event_field *fields; /* Array of fields. */ | |
246 | unsigned int alignment; | |
247 | } struct_nestable; | |
248 | ||
249 | union { | |
250 | /* legacy provider ABI 1.0 */ | |
251 | union _lttng_basic_type basic; /* legacy */ | |
252 | struct { | |
253 | struct lttng_basic_type elem_type; | |
254 | unsigned int length; /* Num. elems. */ | |
255 | } array; /* legacy */ | |
256 | struct { | |
257 | struct lttng_basic_type length_type; | |
258 | struct lttng_basic_type elem_type; | |
259 | } sequence; /* legacy */ | |
260 | struct { | |
261 | unsigned int nr_fields; | |
262 | struct lttng_event_field *fields; /* Array of fields. */ | |
263 | } _struct; /* legacy */ | |
264 | } legacy; | |
37d5e202 | 265 | char padding[LTTNG_UST_TYPE_PADDING]; |
8020ceb5 MD |
266 | } u; |
267 | }; | |
268 | ||
37d5e202 | 269 | #define LTTNG_UST_ENUM_TYPE_PADDING 24 |
c785c634 | 270 | struct lttng_enum_desc { |
8020ceb5 | 271 | const char *name; |
8020ceb5 | 272 | const struct lttng_enum_entry *entries; |
c785c634 | 273 | unsigned int nr_entries; |
37d5e202 | 274 | char padding[LTTNG_UST_ENUM_TYPE_PADDING]; |
8020ceb5 MD |
275 | }; |
276 | ||
180901e6 MD |
277 | /* |
278 | * Event field description | |
279 | * | |
280 | * IMPORTANT: this structure is part of the ABI between the probe and | |
281 | * UST. Fields need to be only added at the end, never reordered, never | |
282 | * removed. | |
283 | */ | |
8020ceb5 | 284 | |
4774c8f3 | 285 | #define LTTNG_UST_EVENT_FIELD_PADDING 28 |
8020ceb5 MD |
286 | struct lttng_event_field { |
287 | const char *name; | |
288 | struct lttng_type type; | |
180901e6 | 289 | unsigned int nowrite; /* do not write into trace */ |
218deb69 MD |
290 | union { |
291 | struct { | |
292 | unsigned int nofilter:1; /* do not consider for filter */ | |
293 | } ext; | |
294 | char padding[LTTNG_UST_EVENT_FIELD_PADDING]; | |
295 | } u; | |
8020ceb5 MD |
296 | }; |
297 | ||
53569322 MD |
298 | enum lttng_ust_dynamic_type { |
299 | LTTNG_UST_DYNAMIC_TYPE_NONE, | |
300 | LTTNG_UST_DYNAMIC_TYPE_S8, | |
301 | LTTNG_UST_DYNAMIC_TYPE_S16, | |
302 | LTTNG_UST_DYNAMIC_TYPE_S32, | |
303 | LTTNG_UST_DYNAMIC_TYPE_S64, | |
304 | LTTNG_UST_DYNAMIC_TYPE_U8, | |
305 | LTTNG_UST_DYNAMIC_TYPE_U16, | |
306 | LTTNG_UST_DYNAMIC_TYPE_U32, | |
307 | LTTNG_UST_DYNAMIC_TYPE_U64, | |
308 | LTTNG_UST_DYNAMIC_TYPE_FLOAT, | |
309 | LTTNG_UST_DYNAMIC_TYPE_DOUBLE, | |
310 | LTTNG_UST_DYNAMIC_TYPE_STRING, | |
311 | _NR_LTTNG_UST_DYNAMIC_TYPES, | |
312 | }; | |
313 | ||
314 | struct lttng_ctx_value { | |
315 | enum lttng_ust_dynamic_type sel; | |
316 | union { | |
317 | int64_t s64; | |
86133caf | 318 | uint64_t u64; |
53569322 MD |
319 | const char *str; |
320 | double d; | |
321 | } u; | |
77aa5901 MD |
322 | }; |
323 | ||
d58d1454 MD |
324 | struct lttng_perf_counter_field; |
325 | ||
37d5e202 | 326 | #define LTTNG_UST_CTX_FIELD_PADDING 40 |
8020ceb5 MD |
327 | struct lttng_ctx_field { |
328 | struct lttng_event_field event_field; | |
53569322 | 329 | size_t (*get_size)(struct lttng_ctx_field *field, size_t offset); |
8020ceb5 | 330 | void (*record)(struct lttng_ctx_field *field, |
4cfec15c | 331 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 332 | struct lttng_channel *chan); |
77aa5901 | 333 | void (*get_value)(struct lttng_ctx_field *field, |
53569322 | 334 | struct lttng_ctx_value *value); |
8020ceb5 | 335 | union { |
d58d1454 | 336 | struct lttng_perf_counter_field *perf_counter; |
37d5e202 | 337 | char padding[LTTNG_UST_CTX_FIELD_PADDING]; |
8020ceb5 MD |
338 | } u; |
339 | void (*destroy)(struct lttng_ctx_field *field); | |
53569322 | 340 | char *field_name; /* Has ownership, dynamically allocated. */ |
8020ceb5 MD |
341 | }; |
342 | ||
b2cc986a | 343 | #define LTTNG_UST_CTX_PADDING 20 |
8020ceb5 MD |
344 | struct lttng_ctx { |
345 | struct lttng_ctx_field *fields; | |
346 | unsigned int nr_fields; | |
347 | unsigned int allocated_fields; | |
b2cc986a | 348 | unsigned int largest_align; |
37d5e202 MD |
349 | char padding[LTTNG_UST_CTX_PADDING]; |
350 | }; | |
351 | ||
352 | #define LTTNG_UST_EVENT_DESC_PADDING 40 | |
353 | struct lttng_event_desc { | |
354 | const char *name; | |
fbdeb5ec | 355 | void (*probe_callback)(void); |
37d5e202 MD |
356 | const struct lttng_event_ctx *ctx; /* context */ |
357 | const struct lttng_event_field *fields; /* event payload */ | |
358 | unsigned int nr_fields; | |
359 | const int **loglevel; | |
68755429 | 360 | const char *signature; /* Argument types/names received */ |
6ddc916d MD |
361 | union { |
362 | struct { | |
363 | const char **model_emf_uri; | |
d8d2416d | 364 | void (*event_notifier_callback)(void); |
6ddc916d MD |
365 | } ext; |
366 | char padding[LTTNG_UST_EVENT_DESC_PADDING]; | |
367 | } u; | |
37d5e202 MD |
368 | }; |
369 | ||
71d31690 | 370 | #define LTTNG_UST_PROBE_DESC_PADDING 12 |
37d5e202 MD |
371 | struct lttng_probe_desc { |
372 | const char *provider; | |
373 | const struct lttng_event_desc **event_desc; | |
374 | unsigned int nr_events; | |
375 | struct cds_list_head head; /* chain registered probes */ | |
6715d7d1 MD |
376 | struct cds_list_head lazy_init_head; |
377 | int lazy; /* lazy registration */ | |
71d31690 MD |
378 | uint32_t major; |
379 | uint32_t minor; | |
37d5e202 | 380 | char padding[LTTNG_UST_PROBE_DESC_PADDING]; |
8020ceb5 MD |
381 | }; |
382 | ||
37d5e202 MD |
383 | /* Data structures used by the tracer. */ |
384 | ||
e450e339 FD |
385 | enum lttng_enabler_format_type { |
386 | LTTNG_ENABLER_FORMAT_STAR_GLOB, | |
387 | LTTNG_ENABLER_FORMAT_EVENT, | |
e6c12e3d MD |
388 | }; |
389 | ||
390 | /* | |
e58095ef MD |
391 | * Enabler field, within whatever object is enabling an event. Target of |
392 | * backward reference. | |
e6c12e3d | 393 | */ |
e58095ef | 394 | struct lttng_enabler { |
e450e339 | 395 | enum lttng_enabler_format_type format_type; |
e58095ef MD |
396 | |
397 | /* head list of struct lttng_ust_filter_bytecode_node */ | |
398 | struct cds_list_head filter_bytecode_head; | |
0f63324a JI |
399 | /* head list of struct lttng_ust_excluder_node */ |
400 | struct cds_list_head excluder_head; | |
e58095ef MD |
401 | |
402 | struct lttng_ust_event event_param; | |
e58095ef | 403 | unsigned int enabled:1; |
e6c12e3d MD |
404 | }; |
405 | ||
c8fcf224 MD |
406 | struct tp_list_entry { |
407 | struct lttng_ust_tracepoint_iter tp; | |
408 | struct cds_list_head head; | |
409 | }; | |
410 | ||
411 | struct lttng_ust_tracepoint_list { | |
412 | struct tp_list_entry *iter; | |
413 | struct cds_list_head head; | |
8020ceb5 MD |
414 | }; |
415 | ||
06d4f27e MD |
416 | struct tp_field_list_entry { |
417 | struct lttng_ust_field_iter field; | |
418 | struct cds_list_head head; | |
419 | }; | |
420 | ||
421 | struct lttng_ust_field_list { | |
422 | struct tp_field_list_entry *iter; | |
423 | struct cds_list_head head; | |
424 | }; | |
425 | ||
8165c8da | 426 | struct ust_pending_probe; |
7dd08bec | 427 | struct lttng_event; |
f488575f | 428 | |
8a92ed2a | 429 | /* |
04aa13f8 | 430 | * Bytecode interpreter return value masks. |
8a92ed2a | 431 | */ |
04aa13f8 FD |
432 | enum lttng_bytecode_interpreter_ret { |
433 | LTTNG_INTERPRETER_DISCARD = 0, | |
434 | LTTNG_INTERPRETER_RECORD_FLAG = (1ULL << 0), | |
8a92ed2a MD |
435 | /* Other bits are kept for future use. */ |
436 | }; | |
437 | ||
d37ecb3f FD |
438 | struct lttng_interpreter_output; |
439 | ||
73d37531 FD |
440 | /* |
441 | * This structure is used in the probes. More specifically, the `filter` and | |
442 | * `node` fields are explicity used in the probes. When modifying this | |
443 | * structure we must not change the layout of these two fields as it is | |
444 | * considered ABI. | |
445 | */ | |
f488575f MD |
446 | struct lttng_bytecode_runtime { |
447 | /* Associated bytecode */ | |
ab249ecf | 448 | struct lttng_ust_bytecode_node *bc; |
c42416df FD |
449 | union { |
450 | uint64_t (*filter)(void *interpreter_data, | |
451 | const char *interpreter_stack_data); | |
d37ecb3f FD |
452 | uint64_t (*capture)(void *interpreter_data, |
453 | const char *interpreter_stack_data, | |
454 | struct lttng_interpreter_output *interpreter_output); | |
c42416df | 455 | } interpreter_funcs; |
21af05a9 | 456 | int link_failed; |
e58095ef | 457 | struct cds_list_head node; /* list of bytecode runtime in event */ |
b77aaa1b | 458 | /* |
d8d2416d FD |
459 | * Pointer to a URCU-protected pointer owned by an `struct |
460 | * lttng_session`or `struct lttng_event_notifier_group`. | |
b77aaa1b FD |
461 | */ |
462 | struct lttng_ctx **pctx; | |
e58095ef MD |
463 | }; |
464 | ||
465 | /* | |
d8d2416d FD |
466 | * Objects in a linked-list of enablers, owned by an event or event_notifier. |
467 | * This is used because an event (or a event_notifier) can be enabled by more | |
468 | * than one enabler and we want a quick way to iterate over all enablers of an | |
469 | * object. | |
470 | * | |
471 | * For example, event rules "my_app:a*" and "my_app:ab*" will both match the | |
472 | * event with the name "my_app:abc". | |
e58095ef MD |
473 | */ |
474 | struct lttng_enabler_ref { | |
475 | struct cds_list_head node; /* enabler ref list */ | |
476 | struct lttng_enabler *ref; /* backward ref */ | |
f488575f | 477 | }; |
8165c8da | 478 | |
8020ceb5 | 479 | /* |
7dd08bec MD |
480 | * lttng_event structure is referred to by the tracing fast path. It |
481 | * must be kept small. | |
180901e6 MD |
482 | * |
483 | * IMPORTANT: this structure is part of the ABI between the probe and | |
484 | * UST. Fields need to be only added at the end, never reordered, never | |
485 | * removed. | |
8020ceb5 | 486 | */ |
7dd08bec | 487 | struct lttng_event { |
180901e6 | 488 | /* LTTng-UST 2.0 starts here */ |
8020ceb5 | 489 | unsigned int id; |
7dd08bec | 490 | struct lttng_channel *chan; |
976fe9ea | 491 | int enabled; |
8020ceb5 | 492 | const struct lttng_event_desc *desc; |
e58095ef | 493 | void *_deprecated1; |
8020ceb5 | 494 | struct lttng_ctx *ctx; |
9f3fdbc6 | 495 | enum lttng_ust_instrumentation instrumentation; |
e58095ef MD |
496 | struct cds_list_head node; /* Event list in session */ |
497 | struct cds_list_head _deprecated2; | |
498 | void *_deprecated3; | |
13b21cd6 | 499 | unsigned int _deprecated4:1; |
e58095ef | 500 | |
180901e6 | 501 | /* LTTng-UST 2.1 starts here */ |
e58095ef | 502 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
a56fd376 | 503 | struct cds_list_head filter_bytecode_runtime_head; |
dcdeaff0 | 504 | int has_enablers_without_bytecode; |
e58095ef MD |
505 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
506 | struct cds_list_head enablers_ref_head; | |
d56fa719 | 507 | struct cds_hlist_node hlist; /* session ht of events */ |
ac6b4ac6 | 508 | int registered; /* has reg'd tracepoint probe */ |
8020ceb5 MD |
509 | }; |
510 | ||
d8d2416d FD |
511 | struct lttng_event_notifier { |
512 | uint64_t user_token; | |
513 | int enabled; | |
514 | int registered; /* has reg'd tracepoint probe */ | |
d37ecb3f | 515 | size_t num_captures; /* Needed to allocate the msgpack array. */ |
d8d2416d | 516 | struct cds_list_head filter_bytecode_runtime_head; |
d37ecb3f | 517 | struct cds_list_head capture_bytecode_runtime_head; |
d8d2416d FD |
518 | int has_enablers_without_bytecode; |
519 | struct cds_list_head enablers_ref_head; | |
520 | const struct lttng_event_desc *desc; | |
521 | struct cds_hlist_node hlist; /* hashtable of event_notifiers */ | |
522 | struct cds_list_head node; /* event_notifier list in session */ | |
523 | struct lttng_event_notifier_group *group; /* weak ref */ | |
524 | }; | |
525 | ||
c785c634 MD |
526 | struct lttng_enum { |
527 | const struct lttng_enum_desc *desc; | |
528 | struct lttng_session *session; | |
529 | struct cds_list_head node; /* Enum list in session */ | |
530 | struct cds_hlist_node hlist; /* Session ht of enums */ | |
531 | uint64_t id; /* Enumeration ID in sessiond */ | |
532 | }; | |
533 | ||
8d8a24c8 | 534 | struct channel; |
38fae1d3 | 535 | struct lttng_ust_shm_handle; |
8d8a24c8 | 536 | |
180901e6 MD |
537 | /* |
538 | * IMPORTANT: this structure is part of the ABI between the probe and | |
539 | * UST. Fields need to be only added at the end, never reordered, never | |
540 | * removed. | |
541 | */ | |
7dd08bec MD |
542 | struct lttng_channel_ops { |
543 | struct lttng_channel *(*channel_create)(const char *name, | |
74d81a6c MD |
544 | void *buf_addr, |
545 | size_t subbuf_size, size_t num_subbuf, | |
546 | unsigned int switch_timer_interval, | |
547 | unsigned int read_timer_interval, | |
6ca18e66 | 548 | unsigned char *uuid, |
a9ff648c | 549 | uint32_t chan_id, |
b2c5f61a MD |
550 | const int *stream_fds, int nr_stream_fds, |
551 | int64_t blocking_timeout); | |
74d81a6c | 552 | void (*channel_destroy)(struct lttng_channel *chan); |
a44c74d9 MD |
553 | union { |
554 | void *_deprecated1; | |
f9ec4a97 MD |
555 | /* |
556 | * has_strcpy is needed by probe providers version 1.0 to | |
557 | * dynamically detect whether the LTTng-UST tracepoint | |
558 | * provider ABI implements event_strcpy. Starting from | |
559 | * probe providers version 2.0, the check is not needed, | |
560 | * but backward compatibility is provided for older versions. | |
561 | */ | |
a44c74d9 MD |
562 | unsigned long has_strcpy:1; /* ABI has strcpy */ |
563 | } u; | |
9e917229 | 564 | void *_deprecated2; |
4cfec15c | 565 | int (*event_reserve)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
8020ceb5 | 566 | uint32_t event_id); |
4cfec15c | 567 | void (*event_commit)(struct lttng_ust_lib_ring_buffer_ctx *ctx); |
74d81a6c MD |
568 | void (*event_write)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
569 | const void *src, size_t len); | |
8020ceb5 MD |
570 | /* |
571 | * packet_avail_size returns the available size in the current | |
572 | * packet. Note that the size returned is only a hint, since it | |
573 | * may change due to concurrent writes. | |
574 | */ | |
1d498196 | 575 | size_t (*packet_avail_size)(struct channel *chan, |
38fae1d3 | 576 | struct lttng_ust_shm_handle *handle); |
9f3fdbc6 MD |
577 | //wait_queue_head_t *(*get_reader_wait_queue)(struct channel *chan); |
578 | //wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); | |
8020ceb5 MD |
579 | int (*is_finalized)(struct channel *chan); |
580 | int (*is_disabled)(struct channel *chan); | |
38fae1d3 | 581 | int (*flush_buffer)(struct channel *chan, struct lttng_ust_shm_handle *handle); |
a44c74d9 MD |
582 | void (*event_strcpy)(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
583 | const char *src, size_t len); | |
8020ceb5 MD |
584 | }; |
585 | ||
180901e6 MD |
586 | /* |
587 | * IMPORTANT: this structure is part of the ABI between the probe and | |
588 | * UST. Fields need to be only added at the end, never reordered, never | |
589 | * removed. | |
590 | */ | |
7dd08bec | 591 | struct lttng_channel { |
a3f61e7f MD |
592 | /* |
593 | * The pointers located in this private data are NOT safe to be | |
594 | * dereferenced by the consumer. The only operations the | |
595 | * consumer process is designed to be allowed to do is to read | |
596 | * and perform subbuffer flush. | |
597 | */ | |
8020ceb5 | 598 | struct channel *chan; /* Channel buffers */ |
976fe9ea | 599 | int enabled; |
8020ceb5 MD |
600 | struct lttng_ctx *ctx; |
601 | /* Event ID management */ | |
7dd08bec | 602 | struct lttng_session *session; |
0a42beb6 | 603 | int objd; /* Object associated to channel */ |
32ce8569 MD |
604 | unsigned int _deprecated1; |
605 | unsigned int _deprecated2; | |
e58095ef | 606 | struct cds_list_head node; /* Channel list in session */ |
74d81a6c | 607 | const struct lttng_channel_ops *ops; |
8020ceb5 | 608 | int header_type; /* 0: unset, 1: compact, 2: large */ |
38fae1d3 | 609 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ |
13b21cd6 | 610 | unsigned int _deprecated3:1; |
a3f61e7f | 611 | |
74d81a6c | 612 | /* Channel ID */ |
a3f61e7f | 613 | unsigned int id; |
74d81a6c | 614 | enum lttng_ust_chan_type type; |
19d8b1b3 | 615 | unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */ |
ac6b4ac6 | 616 | int tstate:1; /* Transient enable state */ |
8020ceb5 MD |
617 | }; |
618 | ||
53569322 MD |
619 | #define LTTNG_UST_STACK_CTX_PADDING 32 |
620 | struct lttng_stack_ctx { | |
621 | struct lttng_event *event; | |
622 | struct lttng_ctx *chan_ctx; /* RCU dereferenced. */ | |
623 | struct lttng_ctx *event_ctx; /* RCU dereferenced. */ | |
624 | char padding[LTTNG_UST_STACK_CTX_PADDING]; | |
625 | }; | |
626 | ||
71a9d034 | 627 | #define LTTNG_UST_EVENT_HT_BITS 12 |
e58095ef MD |
628 | #define LTTNG_UST_EVENT_HT_SIZE (1U << LTTNG_UST_EVENT_HT_BITS) |
629 | ||
630 | struct lttng_ust_event_ht { | |
631 | struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE]; | |
632 | }; | |
633 | ||
d8d2416d FD |
634 | #define LTTNG_UST_EVENT_NOTIFIER_HT_BITS 12 |
635 | #define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS) | |
636 | struct lttng_ust_event_notifier_ht { | |
637 | struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE]; | |
638 | }; | |
639 | ||
c785c634 MD |
640 | #define LTTNG_UST_ENUM_HT_BITS 12 |
641 | #define LTTNG_UST_ENUM_HT_SIZE (1U << LTTNG_UST_ENUM_HT_BITS) | |
642 | ||
643 | struct lttng_ust_enum_ht { | |
644 | struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE]; | |
645 | }; | |
646 | ||
180901e6 MD |
647 | /* |
648 | * IMPORTANT: this structure is part of the ABI between the probe and | |
649 | * UST. Fields need to be only added at the end, never reordered, never | |
650 | * removed. | |
651 | */ | |
7dd08bec | 652 | struct lttng_session { |
e58095ef MD |
653 | int active; /* Is trace session active ? */ |
654 | int been_active; /* Been active ? */ | |
655 | int objd; /* Object associated */ | |
13b21cd6 | 656 | void *_deprecated1; |
e58095ef MD |
657 | struct cds_list_head chan_head; /* Channel list head */ |
658 | struct cds_list_head events_head; /* list of events */ | |
13b21cd6 | 659 | struct cds_list_head _deprecated2; |
e58095ef | 660 | struct cds_list_head node; /* Session list */ |
13b21cd6 MD |
661 | int _deprecated3; |
662 | unsigned int _deprecated4:1; | |
e58095ef MD |
663 | |
664 | /* New UST 2.1 */ | |
665 | /* List of enablers */ | |
666 | struct cds_list_head enablers_head; | |
d56fa719 | 667 | struct lttng_ust_event_ht events_ht; /* ht of events */ |
32ce8569 | 668 | void *owner; /* object owner */ |
ac6b4ac6 | 669 | int tstate:1; /* Transient enable state */ |
246be17e PW |
670 | |
671 | /* New UST 2.4 */ | |
672 | int statedump_pending:1; | |
c785c634 MD |
673 | |
674 | /* New UST 2.8 */ | |
675 | struct lttng_ust_enum_ht enums_ht; /* ht of enumerations */ | |
676 | struct cds_list_head enums_head; | |
53569322 | 677 | struct lttng_ctx *ctx; /* contexts for filters. */ |
8020ceb5 MD |
678 | }; |
679 | ||
d8d2416d FD |
680 | struct lttng_event_notifier_group { |
681 | int objd; | |
682 | void *owner; | |
683 | int notification_fd; | |
684 | struct cds_list_head node; /* Event notifier group handle list */ | |
685 | struct cds_list_head enablers_head; | |
686 | struct cds_list_head event_notifiers_head; /* list of event_notifiers */ | |
687 | struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */ | |
688 | struct lttng_ctx *ctx; /* contexts for filters. */ | |
689 | }; | |
690 | ||
7dd08bec | 691 | struct lttng_transport { |
8020ceb5 | 692 | char *name; |
9f3fdbc6 | 693 | struct cds_list_head node; |
7dd08bec | 694 | struct lttng_channel_ops ops; |
74d81a6c | 695 | const struct lttng_ust_lib_ring_buffer_config *client_config; |
8020ceb5 MD |
696 | }; |
697 | ||
7dd08bec MD |
698 | struct lttng_session *lttng_session_create(void); |
699 | int lttng_session_enable(struct lttng_session *session); | |
700 | int lttng_session_disable(struct lttng_session *session); | |
710b8ee3 | 701 | int lttng_session_statedump(struct lttng_session *session); |
7dd08bec | 702 | void lttng_session_destroy(struct lttng_session *session); |
8020ceb5 | 703 | |
d8d2416d | 704 | void lttng_event_notifier_notification_send( |
d37ecb3f FD |
705 | struct lttng_event_notifier *event_notifier, |
706 | const char *stack_data); | |
d8d2416d | 707 | |
7dd08bec | 708 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
8020ceb5 MD |
709 | const char *transport_name, |
710 | void *buf_addr, | |
711 | size_t subbuf_size, size_t num_subbuf, | |
712 | unsigned int switch_timer_interval, | |
193183fb | 713 | unsigned int read_timer_interval, |
ef9ff354 MD |
714 | int **shm_fd, int **wait_fd, |
715 | uint64_t **memory_map_size, | |
7dd08bec | 716 | struct lttng_channel *chan_priv_init); |
8020ceb5 | 717 | |
7dd08bec MD |
718 | int lttng_channel_enable(struct lttng_channel *channel); |
719 | int lttng_channel_disable(struct lttng_channel *channel); | |
e58095ef | 720 | |
e58095ef | 721 | int lttng_attach_context(struct lttng_ust_context *context_param, |
8e696cfa | 722 | union ust_args *uargs, |
e58095ef | 723 | struct lttng_ctx **ctx, struct lttng_session *session); |
7dd08bec MD |
724 | void lttng_transport_register(struct lttng_transport *transport); |
725 | void lttng_transport_unregister(struct lttng_transport *transport); | |
8020ceb5 | 726 | |
4b4de73e | 727 | void synchronize_trace(void); |
8020ceb5 | 728 | |
7dd08bec MD |
729 | int lttng_probe_register(struct lttng_probe_desc *desc); |
730 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
35ac38cb | 731 | void lttng_probe_provider_unregister_events(struct lttng_probe_desc *desc); |
5f733922 | 732 | int lttng_fix_pending_events(void); |
7dd08bec MD |
733 | int lttng_probes_init(void); |
734 | void lttng_probes_exit(void); | |
8173ec7c | 735 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
77aa5901 | 736 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8173ec7c | 737 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p); |
b2cc986a | 738 | void lttng_context_update(struct lttng_ctx *ctx); |
8173ec7c | 739 | void lttng_remove_context_field(struct lttng_ctx **ctx_p, |
8020ceb5 MD |
740 | struct lttng_ctx_field *field); |
741 | void lttng_destroy_context(struct lttng_ctx *ctx); | |
3b402b40 | 742 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); |
c1ef86f0 | 743 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
8173ec7c | 744 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx); |
4847e9bb | 745 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
96f85541 | 746 | int lttng_add_ip_to_ctx(struct lttng_ctx **ctx); |
c7ea8487 | 747 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
53569322 | 748 | int lttng_add_dyntest_to_ctx(struct lttng_ctx **ctx); |
735bef47 MJ |
749 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); |
750 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); | |
751 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); | |
752 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); | |
753 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); | |
cefef7a7 | 754 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx); |
735bef47 MJ |
755 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); |
756 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); | |
fca2f191 MJ |
757 | int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); |
758 | int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); | |
759 | int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); | |
760 | int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); | |
761 | int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); | |
762 | int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); | |
a93bfc45 | 763 | void lttng_context_vtid_reset(void); |
c1ef86f0 | 764 | void lttng_context_vpid_reset(void); |
46228a6f | 765 | void lttng_context_procname_reset(void); |
735bef47 MJ |
766 | void lttng_context_cgroup_ns_reset(void); |
767 | void lttng_context_ipc_ns_reset(void); | |
768 | void lttng_context_mnt_ns_reset(void); | |
769 | void lttng_context_net_ns_reset(void); | |
770 | void lttng_context_pid_ns_reset(void); | |
cefef7a7 | 771 | void lttng_context_time_ns_reset(void); |
735bef47 MJ |
772 | void lttng_context_user_ns_reset(void); |
773 | void lttng_context_uts_ns_reset(void); | |
fca2f191 MJ |
774 | void lttng_context_vuid_reset(void); |
775 | void lttng_context_veuid_reset(void); | |
776 | void lttng_context_vsuid_reset(void); | |
777 | void lttng_context_vgid_reset(void); | |
778 | void lttng_context_vegid_reset(void); | |
779 | void lttng_context_vsgid_reset(void); | |
9f3fdbc6 | 780 | |
d58d1454 MD |
781 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
782 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
783 | uint64_t config, | |
784 | const char *name, | |
785 | struct lttng_ctx **ctx); | |
786 | int lttng_perf_counter_init(void); | |
787 | void lttng_perf_counter_exit(void); | |
788 | #else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */ | |
789 | static inline | |
790 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
791 | uint64_t config, | |
792 | const char *name, | |
793 | struct lttng_ctx **ctx) | |
794 | { | |
795 | return -ENOSYS; | |
796 | } | |
797 | static inline | |
798 | int lttng_perf_counter_init(void) | |
799 | { | |
800 | return 0; | |
801 | } | |
802 | static inline | |
803 | void lttng_perf_counter_exit(void) | |
804 | { | |
805 | } | |
806 | #endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */ | |
807 | ||
82b9bde8 JD |
808 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_metadata; |
809 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_discard; | |
810 | extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_overwrite; | |
c1fca457 | 811 | |
7dd08bec | 812 | struct lttng_transport *lttng_transport_find(const char *name); |
c1fca457 | 813 | |
7dd08bec MD |
814 | int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list); |
815 | void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list); | |
c8fcf224 MD |
816 | struct lttng_ust_tracepoint_iter * |
817 | lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list); | |
7dd08bec MD |
818 | int lttng_probes_get_field_list(struct lttng_ust_field_list *list); |
819 | void lttng_probes_prune_field_list(struct lttng_ust_field_list *list); | |
06d4f27e MD |
820 | struct lttng_ust_field_iter * |
821 | lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list); | |
c8fcf224 | 822 | |
7dd08bec | 823 | void lttng_free_event_filter_runtime(struct lttng_event *event); |
e58095ef MD |
824 | |
825 | struct cds_list_head *lttng_get_probe_list_head(void); | |
6715d7d1 | 826 | int lttng_session_active(void); |
e6c12e3d | 827 | |
246be17e | 828 | typedef int (*t_statedump_func_ptr)(struct lttng_session *session); |
3327ac33 | 829 | void lttng_handle_pending_statedump(void *owner); |
37dddb65 | 830 | struct cds_list_head *_lttng_get_sessions(void); |
b33b46f7 FD |
831 | |
832 | struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, | |
833 | const struct lttng_enum_desc *enum_desc); | |
246be17e | 834 | |
97c7c238 | 835 | void lttng_ust_dl_update(void *ip); |
6548fca4 | 836 | void lttng_ust_fixup_fd_tracker_tls(void); |
97c7c238 | 837 | |
4a1f7569 MD |
838 | /* For backward compatibility. Leave those exported symbols in place. */ |
839 | extern struct lttng_ctx *lttng_static_ctx; | |
92495593 FD |
840 | struct lttng_ust_filter_bytecode_node; |
841 | struct lttng_ust_excluder_node; | |
4a1f7569 MD |
842 | void lttng_context_init(void); |
843 | void lttng_context_exit(void); | |
a211b293 | 844 | void lttng_filter_event_link_bytecode(struct lttng_event *event); |
d871c65b FD |
845 | struct lttng_enabler *lttng_enabler_create( |
846 | enum lttng_enabler_format_type format_type, | |
847 | struct lttng_ust_event *event_param, | |
848 | struct lttng_channel *chan); | |
849 | int lttng_enabler_enable(struct lttng_enabler *enabler); | |
850 | int lttng_enabler_disable(struct lttng_enabler *enabler); | |
851 | int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, | |
852 | struct lttng_ust_filter_bytecode_node *bytecode); | |
853 | int lttng_enabler_attach_context(struct lttng_enabler *enabler, | |
854 | struct lttng_ust_context *ctx); | |
855 | int lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
856 | struct lttng_ust_excluder_node *excluder); | |
857 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, | |
858 | struct lttng_enabler *enabler); | |
4d451c15 | 859 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
51f804ec FD |
860 | int lttng_session_context_init(struct lttng_ctx **ctx); |
861 | ||
4a1f7569 | 862 | |
6453d237 MD |
863 | #ifdef __cplusplus |
864 | } | |
865 | #endif | |
866 | ||
51489cad | 867 | #endif /* _LTTNG_UST_EVENTS_H */ |