projects / lttng-ust.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
tracepoint: Refactor representation of nested types
[lttng-ust.git] / include / lttng / ust-tracepoint-event.h
CommitLineData
1c324e59 1/*
e92f3e28 2 * Copyright (c) 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
1c324e59 3 *
e92f3e28
MD		 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
1c324e59 10 *
e92f3e28
MD		 11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
d2428e87
MD		 13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
1c324e59
MD		 21 */
22
fb31eb73 23#include <stdint.h>
1c324e59 24#include <stdio.h>
7d381d6e 25#include <stdlib.h>
1c324e59 26#include <urcu/compiler.h>
f488575f 27#include <urcu/rculist.h>
1c324e59 28#include <lttng/ust-events.h>
1c324e59 29#include <lttng/ringbuffer-config.h>
a8909ba5 30#include <lttng/ust-compiler.h>
000b8662 31#include <lttng/tracepoint.h>
39ad74cf 32#include <byteswap.h>
44c72f10 33#include <string.h>
1c324e59 34
24a39530
PP		 35#define __LTTNG_UST_NULL_STRING "(null)"
36
000b8662
MD		 37#undef tp_list_for_each_entry_rcu
38#define tp_list_for_each_entry_rcu(pos, head, member) \
39 for (pos = cds_list_entry(tp_rcu_dereference_bp((head)->next), __typeof__(*pos), member); \
40 &pos->member != (head); \
41 pos = cds_list_entry(tp_rcu_dereference_bp(pos->member.next), __typeof__(*pos), member))
42
1c324e59
MD		 43/*
44 * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
45 * same arguments and having the same field layout.
46 *
47 * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
48 * its own provider and name. It refers to a class (template).
49 *
50 * TRACEPOINT_EVENT declared both a class and an instance and does a
51 * direct mapping from the instance to the class.
52 */
53
54#undef TRACEPOINT_EVENT
55#define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
56 TRACEPOINT_EVENT_CLASS(_provider, _name, \
57 _TP_PARAMS(_args), \
58 _TP_PARAMS(_fields)) \
59 TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \
68755429 60 _TP_PARAMS(_args))
1c324e59
MD		 61
62/* Helpers */
63#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
64
65#define _tp_max_t(type, x, y) \
66 ({ \
67 type __max1 = (x); \
68 type __max2 = (y); \
69 __max1 > __max2 ? __max1: __max2; \
70 })
71
72/*
73 * Stage 0 of tracepoint event generation.
74 *
75 * Check that each TRACEPOINT_EVENT provider argument match the
76 * TRACEPOINT_PROVIDER by creating dummy callbacks.
77 */
78
79/* Reset all macros within TRACEPOINT_EVENT */
80#include <lttng/ust-tracepoint-event-reset.h>
81
7ce6b21d
PW		 82static inline lttng_ust_notrace
83void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void);
1c324e59
MD		 84static inline
85void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
86{
87}
88
89#undef TRACEPOINT_EVENT_CLASS
90#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
91 __tracepoint_provider_mismatch_##_provider();
92
93#undef TRACEPOINT_EVENT_INSTANCE
94#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
95 __tracepoint_provider_mismatch_##_provider();
96
7ce6b21d
PW		 97static inline lttng_ust_notrace
98void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void);
e8bd1da7 99static inline
1c324e59
MD		 100void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
101{
102#include TRACEPOINT_INCLUDE
103}
104
f56cd1d5
MD		 105/*
106 * Stage 0.1 of tracepoint event generation.
107 *
108 * Check that each TRACEPOINT_EVENT provider:name does not exceed the
109 * tracepoint name length limit.
110 */
111
112/* Reset all macros within TRACEPOINT_EVENT */
113#include <lttng/ust-tracepoint-event-reset.h>
114
115#undef TRACEPOINT_EVENT_INSTANCE
116#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
117static const char \
118 __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
119 __attribute__((unused)) = \
120 #_provider ":" #_name;
121
122#include TRACEPOINT_INCLUDE
123
c75c0422
MD		 124/*
125 * Stage 0.2 of tracepoint event generation.
126 *
127 * Create dummy trace prototypes for each event class, and for each used
128 * template. This will allow checking whether the prototypes from the
129 * class and the instance using the class actually match.
130 */
131
132/* Reset all macros within TRACEPOINT_EVENT */
133#include <lttng/ust-tracepoint-event-reset.h>
134
135#undef TP_ARGS
136#define TP_ARGS(...) __VA_ARGS__
137
138#undef TRACEPOINT_EVENT_INSTANCE
139#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
140void __event_template_proto___##_provider##___##_template(_TP_ARGS_DATA_PROTO(_args));
141
142#undef TRACEPOINT_EVENT_CLASS
143#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
144void __event_template_proto___##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
145
146#include TRACEPOINT_INCLUDE
147
c785c634
MD		 148/*
149 * Stage 0.9 of tracepoint event generation
150 *
151 * Unfolding the enums
152 */
153#include <lttng/ust-tracepoint-event-reset.h>
154
155/* Enumeration entry (single value) */
156#undef ctf_enum_value
157#define ctf_enum_value(_string, _value) \
a6f80644
MD		 158 { \
159 .start = { \
a6f80644
MD		 160 .value = lttng_is_signed_type(__typeof__(_value)) ? \
161 (long long) (_value) : (_value), \
2c3f4c28 162 .signedness = lttng_is_signed_type(__typeof__(_value)), \
a6f80644
MD		 163 }, \
164 .end = { \
a6f80644
MD		 165 .value = lttng_is_signed_type(__typeof__(_value)) ? \
166 (long long) (_value) : (_value), \
2c3f4c28 167 .signedness = lttng_is_signed_type(__typeof__(_value)), \
a6f80644
MD		 168 }, \
169 .string = (_string), \
170 },
c785c634
MD		 171
172/* Enumeration entry (range) */
173#undef ctf_enum_range
174#define ctf_enum_range(_string, _range_start, _range_end) \
a6f80644
MD		 175 { \
176 .start = { \
a6f80644
MD		 177 .value = lttng_is_signed_type(__typeof__(_range_start)) ? \
178 (long long) (_range_start) : (_range_start), \
2c3f4c28 179 .signedness = lttng_is_signed_type(__typeof__(_range_start)), \
a6f80644
MD		 180 }, \
181 .end = { \
a6f80644
MD		 182 .value = lttng_is_signed_type(__typeof__(_range_end)) ? \
183 (long long) (_range_end) : (_range_end), \
2c3f4c28 184 .signedness = lttng_is_signed_type(__typeof__(_range_end)), \
a6f80644
MD		 185 }, \
186 .string = (_string), \
187 },
c785c634 188
3e762260
PP		 189/* Enumeration entry (automatic value; follows the rules of CTF) */
190#undef ctf_enum_auto
191#define ctf_enum_auto(_string) \
192 { \
193 .start = { \
194 .value = -1ULL, \
195 .signedness = 0, \
196 }, \
197 .end = { \
198 .value = -1ULL, \
199 .signedness = 0, \
200 }, \
201 .string = (_string), \
202 .u = { \
203 .extra = { \
204 .options = LTTNG_ENUM_ENTRY_OPTION_IS_AUTO, \
205 }, \
206 }, \
207 },
208
c785c634
MD		 209#undef TP_ENUM_VALUES
210#define TP_ENUM_VALUES(...) \
211 __VA_ARGS__
212
213#undef TRACEPOINT_ENUM
214#define TRACEPOINT_ENUM(_provider, _name, _values) \
215 const struct lttng_enum_entry __enum_values__##_provider##_##_name[] = { \
216 _values \
1c80c909 217 ctf_enum_value("", 0) /* Dummy, 0-len array forbidden by C99. */ \
c785c634
MD		 218 };
219
220#include TRACEPOINT_INCLUDE
221
1c324e59
MD		 222/*
223 * Stage 1 of tracepoint event generation.
224 *
225 * Create event field type metadata section.
226 * Each event produce an array of fields.
227 */
228
229/* Reset all macros within TRACEPOINT_EVENT */
230#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3
MD		 231#include <lttng/ust-tracepoint-event-write.h>
232#include <lttng/ust-tracepoint-event-nowrite.h>
1c324e59 233
4774c8f3 234#undef _ctf_integer_ext
180901e6 235#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 236 { \
237 .name = #_item, \
238 .type = __type_integer(_type, _byte_order, _base, none),\
180901e6 239 .nowrite = _nowrite, \
218deb69
MD		 240 .u = { \
241 .ext = { \
242 .nofilter = 0, \
243 }, \
244 }, \
1c324e59
MD		 245 },
246
4774c8f3 247#undef _ctf_float
180901e6 248#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 249 { \
250 .name = #_item, \
251 .type = __type_float(_type), \
180901e6 252 .nowrite = _nowrite, \
218deb69
MD		 253 .u = { \
254 .ext = { \
255 .nofilter = 0, \
256 }, \
257 }, \
1c324e59
MD		 258 },
259
4774c8f3 260#undef _ctf_array_encoded
f3ec4cb5
MD		 261#define _ctf_array_encoded(_type, _item, _src, _byte_order, \
262 _length, _encoding, _nowrite, \
263 _elem_type_base) \
1c324e59
MD		 264 { \
265 .name = #_item, \
266 .type = \
267 { \
218deb69 268 .atype = atype_array_nestable, \
46d52200 269 .u = \
1c324e59 270 { \
218deb69 271 .array_nestable = \
46d52200 272 { \
218deb69
MD		 273 .elem_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
274 __type_integer(_type, _byte_order, _elem_type_base, _encoding)), \
46d52200 275 .length = _length, \
218deb69 276 .alignment = 0, \
46d52200
ZT		 277 } \
278 } \
1c324e59 279 }, \
180901e6 280 .nowrite = _nowrite, \
218deb69
MD		 281 .u = { \
282 .ext = { \
283 .nofilter = 0, \
284 }, \
285 }, \
1c324e59
MD		 286 },
287
4774c8f3 288#undef _ctf_sequence_encoded
48d660d1 289#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, \
f968510a
PP		 290 _length_type, _src_length, _encoding, _nowrite, \
291 _elem_type_base) \
218deb69
MD		 292 { \
293 .name = "_" #_item "_length", \
294 .type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
295 .nowrite = _nowrite, \
296 .u = { \
297 .ext = { \
298 .nofilter = 1, \
299 }, \
300 }, \
301 }, \
1c324e59
MD		 302 { \
303 .name = #_item, \
304 .type = \
305 { \
218deb69 306 .atype = atype_sequence_nestable, \
46d52200 307 .u = \
1c324e59 308 { \
218deb69 309 .sequence_nestable = \
46d52200 310 { \
218deb69
MD		 311 .length_name = "_" #_item "_length", \
312 .elem_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
313 __type_integer(_type, _byte_order, _elem_type_base, _encoding)), \
314 .alignment = 0, \
46d52200 315 }, \
1c324e59
MD		 316 }, \
317 }, \
180901e6 318 .nowrite = _nowrite, \
218deb69
MD		 319 .u = { \
320 .ext = { \
321 .nofilter = 0, \
322 }, \
323 }, \
1c324e59
MD		 324 },
325
4774c8f3 326#undef _ctf_string
180901e6 327#define _ctf_string(_item, _src, _nowrite) \
1c324e59
MD		 328 { \
329 .name = #_item, \
330 .type = \
331 { \
332 .atype = atype_string, \
46d52200
ZT		 333 .u = \
334 { \
218deb69 335 .string = { .encoding = lttng_encode_UTF8 } \
46d52200 336 }, \
1c324e59 337 }, \
180901e6 338 .nowrite = _nowrite, \
218deb69
MD		 339 .u = { \
340 .ext = { \
341 .nofilter = 0, \
342 }, \
343 }, \
1c324e59
MD		 344 },
345
c785c634
MD		 346#undef _ctf_enum
347#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
348 { \
349 .name = #_item, \
350 .type = { \
218deb69 351 .atype = atype_enum_nestable, \
c785c634 352 .u = { \
218deb69
MD		 353 .enum_nestable = { \
354 .desc = &__enum_##_provider##_##_name, \
355 .container_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
356 __type_integer(_type, BYTE_ORDER, 10, none)), \
357 }, \
c785c634
MD		 358 }, \
359 }, \
360 .nowrite = _nowrite, \
218deb69
MD		 361 .u = { \
362 .ext = { \
363 .nofilter = 0, \
364 }, \
365 }, \
c785c634
MD		 366 },
367
1c324e59 368#undef TP_FIELDS
2eda209b 369#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
1c324e59
MD		 370
371#undef TRACEPOINT_EVENT_CLASS
372#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
373 static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
374 _fields \
1c80c909 375 ctf_integer(int, dummy, 0) /* Dummy, C99 forbids 0-len array. */ \
1c324e59
MD		 376 };
377
c785c634
MD		 378#undef TRACEPOINT_ENUM
379#define TRACEPOINT_ENUM(_provider, _name, _values) \
380 static const struct lttng_enum_desc __enum_##_provider##_##_name = { \
381 .name = #_provider "_" #_name, \
382 .entries = __enum_values__##_provider##_##_name, \
1c80c909 383 .nr_entries = _TP_ARRAY_SIZE(__enum_values__##_provider##_##_name) - 1, \
c785c634
MD		 384 };
385
1c324e59
MD		 386#include TRACEPOINT_INCLUDE
387
388/*
389 * Stage 2 of tracepoint event generation.
390 *
391 * Create probe callback prototypes.
392 */
393
394/* Reset all macros within TRACEPOINT_EVENT */
395#include <lttng/ust-tracepoint-event-reset.h>
396
397#undef TP_ARGS
2eda209b 398#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 399
400#undef TRACEPOINT_EVENT_CLASS
401#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
402static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
403
404#include TRACEPOINT_INCLUDE
405
406/*
c785c634 407 * Stage 3.0 of tracepoint event generation.
1c324e59 408 *
1c324e59
MD		 409 * Create static inline function that calculates event size.
410 */
411
412/* Reset all macros within TRACEPOINT_EVENT */
413#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 414#include <lttng/ust-tracepoint-event-write.h>
1c324e59 415
4774c8f3 416#undef _ctf_integer_ext
180901e6 417#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 418 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
419 __event_len += sizeof(_type);
420
4774c8f3 421#undef _ctf_float
180901e6 422#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 423 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
424 __event_len += sizeof(_type);
425
4774c8f3 426#undef _ctf_array_encoded
f3ec4cb5
MD		 427#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, _encoding, \
428 _nowrite, _elem_type_base) \
1c324e59
MD		 429 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
430 __event_len += sizeof(_type) * (_length);
431
4774c8f3 432#undef _ctf_sequence_encoded
48d660d1 433#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
f968510a 434 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 435 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
436 __event_len += sizeof(_length_type); \
437 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
438 __dynamic_len[__dynamic_len_idx] = (_src_length); \
439 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
440 __dynamic_len_idx++;
441
4774c8f3 442#undef _ctf_string
180901e6 443#define _ctf_string(_item, _src, _nowrite) \
24a39530
PP		 444 __event_len += __dynamic_len[__dynamic_len_idx++] = \
445 strlen((_src) ? (_src) : __LTTNG_UST_NULL_STRING) + 1;
1c324e59 446
c785c634
MD		 447#undef _ctf_enum
448#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
449 _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
450
1c324e59 451#undef TP_ARGS
2eda209b 452#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 453
454#undef TP_FIELDS
2eda209b 455#define TP_FIELDS(...) __VA_ARGS__
1c324e59
MD		 456
457#undef TRACEPOINT_EVENT_CLASS
a8909ba5
PW		 458#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
459static inline lttng_ust_notrace \
460size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \
461static inline \
462size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
1c324e59
MD		 463{ \
464 size_t __event_len = 0; \
465 unsigned int __dynamic_len_idx = 0; \
466 \
467 if (0) \
468 (void) __dynamic_len_idx; /* don't warn if unused */ \
469 _fields \
470 return __event_len; \
471}
472
473#include TRACEPOINT_INCLUDE
474
1ddfd641
MD		 475/*
476 * Stage 3.1 of tracepoint event generation.
477 *
478 * Create static inline function that layout the filter stack data.
4774c8f3 479 * We make both write and nowrite data available to the filter.
1ddfd641
MD		 480 */
481
482/* Reset all macros within TRACEPOINT_EVENT */
483#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3
MD		 484#include <lttng/ust-tracepoint-event-write.h>
485#include <lttng/ust-tracepoint-event-nowrite.h>
1ddfd641 486
4774c8f3 487#undef _ctf_integer_ext
180901e6 488#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
fa099471 489 if (lttng_is_signed_type(_type)) { \
3ebeea0d
MD		 490 int64_t __ctf_tmp_int64; \
491 switch (sizeof(_type)) { \
492 case 1: \
493 { \
494 union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
495 __ctf_tmp_int64 = (int64_t) __tmp.v; \
496 break; \
497 } \
498 case 2: \
499 { \
500 union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 501 if (_byte_order != BYTE_ORDER) \
502 __tmp.v = bswap_16(__tmp.v); \
3ebeea0d
MD		 503 __ctf_tmp_int64 = (int64_t) __tmp.v; \
504 break; \
505 } \
506 case 4: \
507 { \
508 union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 509 if (_byte_order != BYTE_ORDER) \
510 __tmp.v = bswap_32(__tmp.v); \
3ebeea0d
MD		 511 __ctf_tmp_int64 = (int64_t) __tmp.v; \
512 break; \
513 } \
514 case 8: \
515 { \
516 union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 517 if (_byte_order != BYTE_ORDER) \
518 __tmp.v = bswap_64(__tmp.v); \
3ebeea0d
MD		 519 __ctf_tmp_int64 = (int64_t) __tmp.v; \
520 break; \
521 } \
522 default: \
523 abort(); \
524 }; \
fa099471
MD		 525 memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
526 } else { \
3ebeea0d
MD		 527 uint64_t __ctf_tmp_uint64; \
528 switch (sizeof(_type)) { \
529 case 1: \
530 { \
531 union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
532 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
533 break; \
534 } \
535 case 2: \
536 { \
537 union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 538 if (_byte_order != BYTE_ORDER) \
539 __tmp.v = bswap_16(__tmp.v); \
3ebeea0d
MD		 540 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
541 break; \
542 } \
543 case 4: \
544 { \
545 union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 546 if (_byte_order != BYTE_ORDER) \
547 __tmp.v = bswap_32(__tmp.v); \
3ebeea0d
MD		 548 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
549 break; \
550 } \
551 case 8: \
552 { \
553 union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
39ad74cf
MD		 554 if (_byte_order != BYTE_ORDER) \
555 __tmp.v = bswap_64(__tmp.v); \
3ebeea0d
MD		 556 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
557 break; \
558 } \
559 default: \
560 abort(); \
561 }; \
fa099471
MD		 562 memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
563 } \
1ddfd641
MD		 564 __stack_data += sizeof(int64_t);
565
4774c8f3 566#undef _ctf_float
180901e6 567#define _ctf_float(_type, _item, _src, _nowrite) \
fa099471
MD		 568 { \
569 double __ctf_tmp_double = (double) (_type) (_src); \
570 memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \
571 __stack_data += sizeof(double); \
572 }
1ddfd641 573
4774c8f3 574#undef _ctf_array_encoded
f3ec4cb5
MD		 575#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
576 _encoding, _nowrite, _elem_type_base) \
fa099471
MD		 577 { \
578 unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
59034aab 579 const void *__ctf_tmp_ptr = (_src); \
fa099471
MD		 580 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
581 __stack_data += sizeof(unsigned long); \
b1239ad6
MD		 582 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
583 __stack_data += sizeof(void *); \
fa099471 584 }
1ddfd641 585
4774c8f3 586#undef _ctf_sequence_encoded
48d660d1 587#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
f968510a 588 _src_length, _encoding, _nowrite, _elem_type_base) \
fa099471
MD		 589 { \
590 unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
59034aab 591 const void *__ctf_tmp_ptr = (_src); \
fa099471
MD		 592 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
593 __stack_data += sizeof(unsigned long); \
b1239ad6
MD		 594 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
595 __stack_data += sizeof(void *); \
fa099471 596 }
1ddfd641 597
4774c8f3 598#undef _ctf_string
180901e6 599#define _ctf_string(_item, _src, _nowrite) \
fa099471 600 { \
24a39530
PP		 601 const void *__ctf_tmp_ptr = \
602 ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \
b1239ad6
MD		 603 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
604 __stack_data += sizeof(void *); \
fa099471 605 }
1ddfd641 606
c785c634
MD		 607#undef _ctf_enum
608#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
609 _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
610
1ddfd641
MD		 611#undef TP_ARGS
612#define TP_ARGS(...) __VA_ARGS__
613
614#undef TP_FIELDS
615#define TP_FIELDS(...) __VA_ARGS__
616
617#undef TRACEPOINT_EVENT_CLASS
618#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
619static inline \
620void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\
621 _TP_ARGS_DATA_PROTO(_args)) \
622{ \
623 _fields \
624}
625
626#include TRACEPOINT_INCLUDE
627
1c324e59 628/*
df854e41 629 * Stage 4 of tracepoint event generation.
1c324e59
MD		 630 *
631 * Create static inline function that calculates event payload alignment.
632 */
633
634/* Reset all macros within TRACEPOINT_EVENT */
635#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 636#include <lttng/ust-tracepoint-event-write.h>
1c324e59 637
4774c8f3 638#undef _ctf_integer_ext
180901e6 639#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 640 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
641
4774c8f3 642#undef _ctf_float
180901e6 643#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 644 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
645
4774c8f3 646#undef _ctf_array_encoded
f3ec4cb5
MD		 647#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
648 _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 649 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
650
4774c8f3 651#undef _ctf_sequence_encoded
48d660d1 652#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
f968510a 653 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 654 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \
655 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
656
4774c8f3 657#undef _ctf_string
180901e6 658#define _ctf_string(_item, _src, _nowrite)
1c324e59 659
c785c634
MD		 660#undef _ctf_enum
661#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
662 _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
663
1c324e59 664#undef TP_ARGS
2eda209b 665#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 666
667#undef TP_FIELDS
2eda209b 668#define TP_FIELDS(...) __VA_ARGS__
1c324e59
MD		 669
670#undef TRACEPOINT_EVENT_CLASS
671#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
a8909ba5
PW		 672static inline lttng_ust_notrace \
673size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \
1c324e59
MD		 674static inline \
675size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
676{ \
677 size_t __event_align = 1; \
678 _fields \
679 return __event_align; \
680}
681
682#include TRACEPOINT_INCLUDE
683
684
685/*
df854e41 686 * Stage 5 of tracepoint event generation.
1c324e59
MD		 687 *
688 * Create the probe function. This function calls event size calculation
689 * and writes event data into the buffer.
690 */
691
692/* Reset all macros within TRACEPOINT_EVENT */
693#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 694#include <lttng/ust-tracepoint-event-write.h>
1c324e59 695
4774c8f3 696#undef _ctf_integer_ext
180901e6 697#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 698 { \
699 _type __tmp = (_src); \
700 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
701 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
702 }
703
4774c8f3 704#undef _ctf_float
180901e6 705#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 706 { \
707 _type __tmp = (_src); \
708 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
709 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
710 }
711
4774c8f3 712#undef _ctf_array_encoded
f3ec4cb5
MD		 713#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
714 _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 715 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
716 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));
717
4774c8f3 718#undef _ctf_sequence_encoded
48d660d1 719#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
f968510a 720 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59 721 { \
d71b57b9 722 _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
1c324e59
MD		 723 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
724 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
725 } \
726 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
727 __chan->ops->event_write(&__ctx, _src, \
728 sizeof(_type) * __get_dynamic_len(dest));
729
4774c8f3 730#undef _ctf_string
180901e6 731#define _ctf_string(_item, _src, _nowrite) \
24a39530
PP		 732 { \
733 const char *__ctf_tmp_string = \
734 ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \
735 lib_ring_buffer_align_ctx(&__ctx, \
736 lttng_alignof(*__ctf_tmp_string)); \
f9ec4a97
MD		 737 __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \
738 __get_dynamic_len(dest)); \
24a39530
PP		 739 }
740
1c324e59 741
c785c634
MD		 742#undef _ctf_enum
743#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
744 _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
745
1c324e59
MD		 746/* Beware: this get len actually consumes the len value */
747#undef __get_dynamic_len
d71b57b9 748#define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
1c324e59
MD		 749
750#undef TP_ARGS
2eda209b 751#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 752
753#undef TP_FIELDS
2eda209b 754#define TP_FIELDS(...) __VA_ARGS__
1c324e59 755
95c25348
PW		 756/*
757 * For state dump, check that "session" argument (mandatory) matches the
758 * session this event belongs to. Ensures that we write state dump data only
759 * into the started session, not into all sessions.
760 */
761#undef _TP_SESSION_CHECK
762#ifdef TP_SESSION_CHECK
763#define _TP_SESSION_CHECK(session, csession) (session == csession)
764#else /* TP_SESSION_CHECK */
765#define _TP_SESSION_CHECK(session, csession) 1
766#endif /* TP_SESSION_CHECK */
767
97904b41
MD		 768/*
769 * Use of __builtin_return_address(0) sometimes seems to cause stack
770 * corruption on 32-bit PowerPC. Disable this feature on that
771 * architecture for now by always using the NULL value for the ip
772 * context.
773 */
5dadb547
MD		 774#undef _TP_IP_PARAM
775#ifdef TP_IP_PARAM
e1d09f9e 776#define _TP_IP_PARAM(x) (x)
5dadb547 777#else /* TP_IP_PARAM */
97904b41
MD		 778
779#if defined(__PPC__) && !defined(__PPC64__)
780#define _TP_IP_PARAM(x) NULL
781#else /* #if defined(__PPC__) && !defined(__PPC64__) */
e1d09f9e 782#define _TP_IP_PARAM(x) __builtin_return_address(0)
97904b41
MD		 783#endif /* #else #if defined(__PPC__) && !defined(__PPC64__) */
784
5dadb547
MD		 785#endif /* TP_IP_PARAM */
786
1ddfd641
MD		 787/*
788 * Using twice size for filter stack data to hold size and pointer for
789 * each field (worse case). For integers, max size required is 64-bit.
790 * Same for double-precision floats. Those fit within
791 * 2*sizeof(unsigned long) for all supported architectures.
61ce3223 792 * Perform UNION (||) of filter runtime list.
1ddfd641 793 */
1c324e59
MD		 794#undef TRACEPOINT_EVENT_CLASS
795#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
a8909ba5
PW		 796static lttng_ust_notrace \
797void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \
798static \
799void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \
1c324e59 800{ \
53569322 801 struct lttng_event *__event = (struct lttng_event *) __tp_data; \
7dd08bec 802 struct lttng_channel *__chan = __event->chan; \
f280cb51 803 struct lttng_ust_lib_ring_buffer_ctx __ctx; \
53569322 804 struct lttng_stack_ctx __lttng_ctx; \
1c324e59
MD		 805 size_t __event_len, __event_align; \
806 size_t __dynamic_len_idx = 0; \
75026e9f 807 const size_t __num_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1; \
d71b57b9 808 union { \
75026e9f
FD		 809 size_t __dynamic_len[__num_fields]; \
810 char __filter_stack_data[2 * sizeof(unsigned long) * __num_fields]; \
d71b57b9 811 } __stackvar; \
1c324e59
MD		 812 int __ret; \
813 \
814 if (0) \
815 (void) __dynamic_len_idx; /* don't warn if unused */ \
95c25348
PW		 816 if (!_TP_SESSION_CHECK(session, __chan->session)) \
817 return; \
1c324e59
MD		 818 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \
819 return; \
820 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \
821 return; \
822 if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
823 return; \
1b436e01
MD		 824 if (caa_unlikely(!TP_RCU_LINK_TEST())) \
825 return; \
e58095ef 826 if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \
f488575f 827 struct lttng_bytecode_runtime *bc_runtime; \
dcdeaff0 828 int __filter_record = __event->has_enablers_without_bytecode; \
f488575f 829 \
1ddfd641 830 __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
f488575f 831 _TP_ARGS_DATA_VAR(_args)); \
000b8662 832 tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
61ce3223 833 if (caa_unlikely(bc_runtime->filter(bc_runtime, \
5ffb7c14 834 __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) { \
8a92ed2a 835 __filter_record = 1; \
5ffb7c14
FD		 836 break; \
837 } \
f488575f 838 } \
8a92ed2a 839 if (caa_likely(!__filter_record)) \
61ce3223 840 return; \
1ddfd641
MD		 841 } \
842 __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
1c324e59
MD		 843 _TP_ARGS_DATA_VAR(_args)); \
844 __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
53569322
MD		 845 memset(&__lttng_ctx, 0, sizeof(__lttng_ctx)); \
846 __lttng_ctx.event = __event; \
847 __lttng_ctx.chan_ctx = tp_rcu_dereference_bp(__chan->ctx); \
848 __lttng_ctx.event_ctx = tp_rcu_dereference_bp(__event->ctx); \
1c324e59 849 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
53569322 850 __event_align, -1, __chan->handle, &__lttng_ctx); \
e1d09f9e 851 __ctx.ip = _TP_IP_PARAM(TP_IP_PARAM); \
1c324e59
MD		 852 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
853 if (__ret < 0) \
854 return; \
855 _fields \
856 __chan->ops->event_commit(&__ctx); \
857}
858
859#include TRACEPOINT_INCLUDE
860
861#undef __get_dynamic_len
862
68755429
MD		 863/*
864 * Stage 5.1 of tracepoint event generation.
865 *
866 * Create probe signature
867 */
868
869/* Reset all macros within TRACEPOINT_EVENT */
870#include <lttng/ust-tracepoint-event-reset.h>
871
872#undef TP_ARGS
2eda209b 873#define TP_ARGS(...) __VA_ARGS__
9eb06182
MD		 874
875#define _TP_EXTRACT_STRING2(...) #__VA_ARGS__
68755429
MD		 876
877#undef TRACEPOINT_EVENT_CLASS
878#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
ff82b7c1 879static const char __tp_event_signature___##_provider##___##_name[] = \
9eb06182 880 _TP_EXTRACT_STRING2(_args);
68755429
MD		 881
882#include TRACEPOINT_INCLUDE
883
9eb06182
MD		 884#undef _TP_EXTRACT_STRING2
885
05ceaafd 886/*
882a56d7 887 * Stage 6 of tracepoint event generation.
1c324e59 888 *
df854e41
MD		 889 * Tracepoint loglevel mapping definition generation. We generate a
890 * symbol for each mapping for a provider/event to ensure at most a 1 to
891 * 1 mapping between events and loglevels. If the symbol is repeated,
892 * the compiler will complain.
05ceaafd
MD		 893 */
894
895/* Reset all macros within TRACEPOINT_EVENT */
896#include <lttng/ust-tracepoint-event-reset.h>
897
4ea4f80e
MD		 898/*
899 * Declare _loglevel___##__provider##___##__name as non-static, with
900 * hidden visibility for c++ handling of weakref. We do a weakref to the
901 * symbol in a later stage, which requires that the symbol is not
902 * mangled.
903 */
904#ifdef __cplusplus
905#define LTTNG_TP_EXTERN_C extern "C"
906#else
907#define LTTNG_TP_EXTERN_C
908#endif
909
05ceaafd 910#undef TRACEPOINT_LOGLEVEL
457a6b58
MD		 911#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
912static const int _loglevel_value___##__provider##___##__name = __loglevel; \
4ea4f80e
MD		 913LTTNG_TP_EXTERN_C const int *_loglevel___##__provider##___##__name \
914 __attribute__((visibility("hidden"))) = \
457a6b58 915 &_loglevel_value___##__provider##___##__name;
df854e41
MD		 916
917#include TRACEPOINT_INCLUDE
918
4ea4f80e 919#undef LTTNG_TP_EXTERN_C
4ea4f80e 920
6ddc916d
MD		 921/*
922 * Stage 6.1 of tracepoint event generation.
923 *
924 * Tracepoint UML URI info.
925 */
926
927/* Reset all macros within TRACEPOINT_EVENT */
928#include <lttng/ust-tracepoint-event-reset.h>
929
4ea4f80e
MD		 930/*
931 * Declare _model_emf_uri___##__provider##___##__name as non-static,
932 * with hidden visibility for c++ handling of weakref. We do a weakref
933 * to the symbol in a later stage, which requires that the symbol is not
934 * mangled.
935 */
936#ifdef __cplusplus
937#define LTTNG_TP_EXTERN_C extern "C"
938#else
939#define LTTNG_TP_EXTERN_C
940#endif
941
6ddc916d
MD		 942#undef TRACEPOINT_MODEL_EMF_URI
943#define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
4ea4f80e 944LTTNG_TP_EXTERN_C const char *_model_emf_uri___##__provider##___##__name \
082802f9 945 __attribute__((visibility("hidden"))) = __uri; \
6ddc916d
MD		 946
947#include TRACEPOINT_INCLUDE
948
4ea4f80e 949#undef LTTNG_TP_EXTERN_C
4ea4f80e 950
df854e41 951/*
882a56d7 952 * Stage 7.1 of tracepoint event generation.
df854e41
MD		 953 *
954 * Create events description structures. We use a weakref because
955 * loglevels are optional. If not declared, the event will point to the
956 * a loglevel that contains NULL.
957 */
958
959/* Reset all macros within TRACEPOINT_EVENT */
960#include <lttng/ust-tracepoint-event-reset.h>
961
962#undef TRACEPOINT_EVENT_INSTANCE
963#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
882a56d7
MD		 964static const int * \
965 __ref_loglevel___##_provider##___##_name \
966 __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
6ddc916d
MD		 967static const char * \
968 __ref_model_emf_uri___##_provider##___##_name \
969 __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\
ff82b7c1 970static const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
df854e41 971 .name = #_provider ":" #_name, \
fbdeb5ec 972 .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
46d52200
ZT		 973 .ctx = NULL, \
974 .fields = __event_fields___##_provider##___##_template, \
1c80c909 975 .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template) - 1, \
882a56d7 976 .loglevel = &__ref_loglevel___##_provider##___##_name, \
68755429 977 .signature = __tp_event_signature___##_provider##___##_template, \
c785c634
MD		 978 .u = { \
979 .ext = { \
980 .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \
981 }, \
982 }, \
df854e41
MD		 983};
984
985#include TRACEPOINT_INCLUDE
05ceaafd 986
df854e41 987/*
882a56d7 988 * Stage 7.2 of tracepoint event generation.
df854e41
MD		 989 *
990 * Create array of events.
991 */
992
993/* Reset all macros within TRACEPOINT_EVENT */
994#include <lttng/ust-tracepoint-event-reset.h>
995
996#undef TRACEPOINT_EVENT_INSTANCE
997#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
998 &__event_desc___##_provider##_##_name,
999
1000static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
05ceaafd 1001#include TRACEPOINT_INCLUDE
1c80c909 1002 NULL, /* Dummy, C99 forbids 0-len array. */
05ceaafd
MD		 1003};
1004
df854e41 1005
05ceaafd 1006/*
882a56d7 1007 * Stage 8 of tracepoint event generation.
05ceaafd
MD		 1008 *
1009 * Create a toplevel descriptor for the whole probe.
1010 */
1011
1012/* non-const because list head will be modified when registered. */
1013static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
df854e41 1014 .provider = __tp_stringify(TRACEPOINT_PROVIDER),
05ceaafd 1015 .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
1c80c909 1016 .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)) - 1,
46d52200
ZT		 1017 .head = { NULL, NULL },
1018 .lazy_init_head = { NULL, NULL },
1019 .lazy = 0,
71d31690
MD		 1020 .major = LTTNG_UST_PROVIDER_MAJOR,
1021 .minor = LTTNG_UST_PROVIDER_MINOR,
05ceaafd
MD		 1022};
1023
f0cc794d
MD		 1024static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER);
1025
05ceaafd 1026/*
882a56d7 1027 * Stage 9 of tracepoint event generation.
05ceaafd 1028 *
1c324e59 1029 * Register/unregister probes at module load/unload.
628e1d81
MD		 1030 *
1031 * Generate the constructor as an externally visible symbol for use when
1032 * linking the probe statically.
f0cc794d
MD		 1033 *
1034 * Register refcount is protected by libc dynamic loader mutex.
1c324e59
MD		 1035 */
1036
1037/* Reset all macros within TRACEPOINT_EVENT */
1038#include <lttng/ust-tracepoint-event-reset.h>
a8909ba5
PW		 1039static void lttng_ust_notrace __attribute__((constructor))
1040_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void);
1041static void
1c324e59
MD		 1042_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
1043{
1044 int ret;
1045
f0cc794d
MD		 1046 if (_TP_COMBINE_TOKENS(__probe_register_refcount___,
1047 TRACEPOINT_PROVIDER)++) {
1048 return;
1049 }
e8bd1da7
MD		 1050 /*
1051 * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a
1052 * static inline function that ensures every probe PROVIDER
1053 * argument match the provider within which they appear. It
1054 * calls empty static inline functions, and therefore has no
1055 * runtime effect. However, if it detects an error, a linker
1056 * error will appear.
1057 */
1058 _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)();
7dd08bec 1059 ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
7d381d6e 1060 if (ret) {
0fdd0b89 1061 fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe.\n", ret);
7d381d6e
MD		 1062 abort();
1063 }
1c324e59
MD		 1064}
1065
a8909ba5
PW		 1066static void lttng_ust_notrace __attribute__((destructor))
1067_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void);
1068static void
1c324e59
MD		 1069_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
1070{
f0cc794d
MD		 1071 if (--_TP_COMBINE_TOKENS(__probe_register_refcount___,
1072 TRACEPOINT_PROVIDER)) {
1073 return;
1074 }
7dd08bec 1075 lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
1c324e59 1076}
628e1d81
MD		 1077
1078int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);
LTTng 2.0 Userspace Tracer
This page took 0.084234 seconds and 4 git commands to generate.