Fix: Cast from pointer to different integer size warning
[lttng-ust.git] / include / lttng / ust-tracepoint-event.h
1 /*
2 * Copyright (c) 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
21 */
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <urcu/compiler.h>
26 #include <urcu/rculist.h>
27 #include <lttng/ust-events.h>
28 #include <lttng/ringbuffer-config.h>
29 #include <lttng/ust-compiler.h>
30 #include <lttng/tracepoint.h>
31 #include <string.h>
32
33 #undef tp_list_for_each_entry_rcu
34 #define tp_list_for_each_entry_rcu(pos, head, member) \
35 for (pos = cds_list_entry(tp_rcu_dereference_bp((head)->next), __typeof__(*pos), member); \
36 &pos->member != (head); \
37 pos = cds_list_entry(tp_rcu_dereference_bp(pos->member.next), __typeof__(*pos), member))
38
39 /*
40 * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
41 * same arguments and having the same field layout.
42 *
43 * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
44 * its own provider and name. It refers to a class (template).
45 *
46 * TRACEPOINT_EVENT declared both a class and an instance and does a
47 * direct mapping from the instance to the class.
48 */
49
50 #undef TRACEPOINT_EVENT
51 #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
52 TRACEPOINT_EVENT_CLASS(_provider, _name, \
53 _TP_PARAMS(_args), \
54 _TP_PARAMS(_fields)) \
55 TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \
56 _TP_PARAMS(_args))
57
58 /* Helpers */
59 #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
60
61 #define _tp_max_t(type, x, y) \
62 ({ \
63 type __max1 = (x); \
64 type __max2 = (y); \
65 __max1 > __max2 ? __max1: __max2; \
66 })
67
68 /*
69 * Stage 0 of tracepoint event generation.
70 *
71 * Check that each TRACEPOINT_EVENT provider argument match the
72 * TRACEPOINT_PROVIDER by creating dummy callbacks.
73 */
74
75 /* Reset all macros within TRACEPOINT_EVENT */
76 #include <lttng/ust-tracepoint-event-reset.h>
77
78 static inline
79 void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
80 {
81 }
82
83 #undef TRACEPOINT_EVENT_CLASS
84 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
85 __tracepoint_provider_mismatch_##_provider();
86
87 #undef TRACEPOINT_EVENT_INSTANCE
88 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
89 __tracepoint_provider_mismatch_##_provider();
90
91 static inline
92 void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
93 {
94 #include TRACEPOINT_INCLUDE
95 }
96
97 /*
98 * Stage 0.1 of tracepoint event generation.
99 *
100 * Check that each TRACEPOINT_EVENT provider:name does not exceed the
101 * tracepoint name length limit.
102 */
103
104 /* Reset all macros within TRACEPOINT_EVENT */
105 #include <lttng/ust-tracepoint-event-reset.h>
106
107 #undef TRACEPOINT_EVENT_INSTANCE
108 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
109 static const char \
110 __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
111 __attribute__((unused)) = \
112 #_provider ":" #_name;
113
114 #include TRACEPOINT_INCLUDE
115
116 /*
117 * Stage 1 of tracepoint event generation.
118 *
119 * Create event field type metadata section.
120 * Each event produce an array of fields.
121 */
122
123 /* Reset all macros within TRACEPOINT_EVENT */
124 #include <lttng/ust-tracepoint-event-reset.h>
125 #include <lttng/ust-tracepoint-event-write.h>
126 #include <lttng/ust-tracepoint-event-nowrite.h>
127
128 #undef _ctf_integer_ext
129 #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
130 { \
131 .name = #_item, \
132 .type = __type_integer(_type, _byte_order, _base, none),\
133 .nowrite = _nowrite, \
134 },
135
136 #undef _ctf_float
137 #define _ctf_float(_type, _item, _src, _nowrite) \
138 { \
139 .name = #_item, \
140 .type = __type_float(_type), \
141 .nowrite = _nowrite, \
142 },
143
144 #undef _ctf_array_encoded
145 #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
146 { \
147 .name = #_item, \
148 .type = \
149 { \
150 .atype = atype_array, \
151 .u = \
152 { \
153 .array = \
154 { \
155 .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
156 .length = _length, \
157 } \
158 } \
159 }, \
160 .nowrite = _nowrite, \
161 },
162
163 #undef _ctf_sequence_encoded
164 #define _ctf_sequence_encoded(_type, _item, _src, \
165 _length_type, _src_length, _encoding, _nowrite) \
166 { \
167 .name = #_item, \
168 .type = \
169 { \
170 .atype = atype_sequence, \
171 .u = \
172 { \
173 .sequence = \
174 { \
175 .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
176 .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
177 }, \
178 }, \
179 }, \
180 .nowrite = _nowrite, \
181 },
182
183 #undef _ctf_string
184 #define _ctf_string(_item, _src, _nowrite) \
185 { \
186 .name = #_item, \
187 .type = \
188 { \
189 .atype = atype_string, \
190 .u = \
191 { \
192 .basic = { .string = { .encoding = lttng_encode_UTF8 } } \
193 }, \
194 }, \
195 .nowrite = _nowrite, \
196 },
197
198 #undef TP_FIELDS
199 #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
200
201 #undef TRACEPOINT_EVENT_CLASS
202 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
203 static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
204 _fields \
205 };
206
207 #include TRACEPOINT_INCLUDE
208
209 /*
210 * Stage 2 of tracepoint event generation.
211 *
212 * Create probe callback prototypes.
213 */
214
215 /* Reset all macros within TRACEPOINT_EVENT */
216 #include <lttng/ust-tracepoint-event-reset.h>
217
218 #undef TP_ARGS
219 #define TP_ARGS(...) __VA_ARGS__
220
221 #undef TRACEPOINT_EVENT_CLASS
222 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
223 static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
224
225 #include TRACEPOINT_INCLUDE
226
227 /*
228 * Stage 3 of tracepoint event generation.
229 *
230 * Create static inline function that calculates event size.
231 */
232
233 /* Reset all macros within TRACEPOINT_EVENT */
234 #include <lttng/ust-tracepoint-event-reset.h>
235 #include <lttng/ust-tracepoint-event-write.h>
236
237 #undef _ctf_integer_ext
238 #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
239 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
240 __event_len += sizeof(_type);
241
242 #undef _ctf_float
243 #define _ctf_float(_type, _item, _src, _nowrite) \
244 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
245 __event_len += sizeof(_type);
246
247 #undef _ctf_array_encoded
248 #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
249 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
250 __event_len += sizeof(_type) * (_length);
251
252 #undef _ctf_sequence_encoded
253 #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
254 _src_length, _encoding, _nowrite) \
255 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
256 __event_len += sizeof(_length_type); \
257 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
258 __dynamic_len[__dynamic_len_idx] = (_src_length); \
259 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
260 __dynamic_len_idx++;
261
262 #undef _ctf_string
263 #define _ctf_string(_item, _src, _nowrite) \
264 __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
265
266 #undef TP_ARGS
267 #define TP_ARGS(...) __VA_ARGS__
268
269 #undef TP_FIELDS
270 #define TP_FIELDS(...) __VA_ARGS__
271
272 #undef TRACEPOINT_EVENT_CLASS
273 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
274 static inline lttng_ust_notrace \
275 size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \
276 static inline \
277 size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
278 { \
279 size_t __event_len = 0; \
280 unsigned int __dynamic_len_idx = 0; \
281 \
282 if (0) \
283 (void) __dynamic_len_idx; /* don't warn if unused */ \
284 _fields \
285 return __event_len; \
286 }
287
288 #include TRACEPOINT_INCLUDE
289
290 /*
291 * Stage 3.1 of tracepoint event generation.
292 *
293 * Create static inline function that layout the filter stack data.
294 * We make both write and nowrite data available to the filter.
295 */
296
297 /* Reset all macros within TRACEPOINT_EVENT */
298 #include <lttng/ust-tracepoint-event-reset.h>
299 #include <lttng/ust-tracepoint-event-write.h>
300 #include <lttng/ust-tracepoint-event-nowrite.h>
301
302 #undef _ctf_integer_ext
303 #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
304 if (lttng_is_signed_type(_type)) { \
305 int64_t __ctf_tmp_int64; \
306 switch (sizeof(_type)) { \
307 case 1: \
308 { \
309 union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
310 __ctf_tmp_int64 = (int64_t) __tmp.v; \
311 break; \
312 } \
313 case 2: \
314 { \
315 union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
316 __ctf_tmp_int64 = (int64_t) __tmp.v; \
317 break; \
318 } \
319 case 4: \
320 { \
321 union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
322 __ctf_tmp_int64 = (int64_t) __tmp.v; \
323 break; \
324 } \
325 case 8: \
326 { \
327 union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
328 __ctf_tmp_int64 = (int64_t) __tmp.v; \
329 break; \
330 } \
331 default: \
332 abort(); \
333 }; \
334 memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
335 } else { \
336 uint64_t __ctf_tmp_uint64; \
337 switch (sizeof(_type)) { \
338 case 1: \
339 { \
340 union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
341 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
342 break; \
343 } \
344 case 2: \
345 { \
346 union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
347 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
348 break; \
349 } \
350 case 4: \
351 { \
352 union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
353 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
354 break; \
355 } \
356 case 8: \
357 { \
358 union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
359 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
360 break; \
361 } \
362 default: \
363 abort(); \
364 }; \
365 memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
366 } \
367 __stack_data += sizeof(int64_t);
368
369 #undef _ctf_float
370 #define _ctf_float(_type, _item, _src, _nowrite) \
371 { \
372 double __ctf_tmp_double = (double) (_type) (_src); \
373 memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \
374 __stack_data += sizeof(double); \
375 }
376
377 #undef _ctf_array_encoded
378 #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
379 { \
380 unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
381 const void *__ctf_tmp_ptr = (_src); \
382 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
383 __stack_data += sizeof(unsigned long); \
384 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
385 __stack_data += sizeof(void **); \
386 }
387
388 #undef _ctf_sequence_encoded
389 #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
390 _src_length, _encoding, _nowrite) \
391 { \
392 unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
393 const void *__ctf_tmp_ptr = (_src); \
394 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
395 __stack_data += sizeof(unsigned long); \
396 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
397 __stack_data += sizeof(void **); \
398 }
399
400 #undef _ctf_string
401 #define _ctf_string(_item, _src, _nowrite) \
402 { \
403 const void *__ctf_tmp_ptr = (_src); \
404 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \
405 __stack_data += sizeof(void **); \
406 }
407
408 #undef TP_ARGS
409 #define TP_ARGS(...) __VA_ARGS__
410
411 #undef TP_FIELDS
412 #define TP_FIELDS(...) __VA_ARGS__
413
414 #undef TRACEPOINT_EVENT_CLASS
415 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
416 static inline \
417 void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\
418 _TP_ARGS_DATA_PROTO(_args)) \
419 { \
420 _fields \
421 }
422
423 #include TRACEPOINT_INCLUDE
424
425
426
427 /*
428 * Stage 4 of tracepoint event generation.
429 *
430 * Create static inline function that calculates event payload alignment.
431 */
432
433 /* Reset all macros within TRACEPOINT_EVENT */
434 #include <lttng/ust-tracepoint-event-reset.h>
435 #include <lttng/ust-tracepoint-event-write.h>
436
437 #undef _ctf_integer_ext
438 #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
439 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
440
441 #undef _ctf_float
442 #define _ctf_float(_type, _item, _src, _nowrite) \
443 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
444
445 #undef _ctf_array_encoded
446 #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
447 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
448
449 #undef _ctf_sequence_encoded
450 #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
451 _src_length, _encoding, _nowrite) \
452 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \
453 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
454
455 #undef _ctf_string
456 #define _ctf_string(_item, _src, _nowrite)
457
458 #undef TP_ARGS
459 #define TP_ARGS(...) __VA_ARGS__
460
461 #undef TP_FIELDS
462 #define TP_FIELDS(...) __VA_ARGS__
463
464 #undef TRACEPOINT_EVENT_CLASS
465 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
466 static inline lttng_ust_notrace \
467 size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \
468 static inline \
469 size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
470 { \
471 size_t __event_align = 1; \
472 _fields \
473 return __event_align; \
474 }
475
476 #include TRACEPOINT_INCLUDE
477
478
479 /*
480 * Stage 5 of tracepoint event generation.
481 *
482 * Create the probe function. This function calls event size calculation
483 * and writes event data into the buffer.
484 */
485
486 /* Reset all macros within TRACEPOINT_EVENT */
487 #include <lttng/ust-tracepoint-event-reset.h>
488 #include <lttng/ust-tracepoint-event-write.h>
489
490 #undef _ctf_integer_ext
491 #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
492 { \
493 _type __tmp = (_src); \
494 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
495 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
496 }
497
498 #undef _ctf_float
499 #define _ctf_float(_type, _item, _src, _nowrite) \
500 { \
501 _type __tmp = (_src); \
502 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
503 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
504 }
505
506 #undef _ctf_array_encoded
507 #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
508 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
509 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));
510
511 #undef _ctf_sequence_encoded
512 #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
513 _src_length, _encoding, _nowrite) \
514 { \
515 _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
516 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
517 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
518 } \
519 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
520 __chan->ops->event_write(&__ctx, _src, \
521 sizeof(_type) * __get_dynamic_len(dest));
522
523 #undef _ctf_string
524 #define _ctf_string(_item, _src, _nowrite) \
525 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \
526 __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest));
527
528 /* Beware: this get len actually consumes the len value */
529 #undef __get_dynamic_len
530 #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
531
532 #undef TP_ARGS
533 #define TP_ARGS(...) __VA_ARGS__
534
535 #undef TP_FIELDS
536 #define TP_FIELDS(...) __VA_ARGS__
537
538 /*
539 * For state dump, check that "session" argument (mandatory) matches the
540 * session this event belongs to. Ensures that we write state dump data only
541 * into the started session, not into all sessions.
542 */
543 #undef _TP_SESSION_CHECK
544 #ifdef TP_SESSION_CHECK
545 #define _TP_SESSION_CHECK(session, csession) (session == csession)
546 #else /* TP_SESSION_CHECK */
547 #define _TP_SESSION_CHECK(session, csession) 1
548 #endif /* TP_SESSION_CHECK */
549
550 /*
551 * Using twice size for filter stack data to hold size and pointer for
552 * each field (worse case). For integers, max size required is 64-bit.
553 * Same for double-precision floats. Those fit within
554 * 2*sizeof(unsigned long) for all supported architectures.
555 * Perform UNION (||) of filter runtime list.
556 */
557 #undef TRACEPOINT_EVENT_CLASS
558 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
559 static lttng_ust_notrace \
560 void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \
561 static \
562 void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \
563 { \
564 struct lttng_event *__event = (struct lttng_event *) __tp_data; \
565 struct lttng_channel *__chan = __event->chan; \
566 struct lttng_ust_lib_ring_buffer_ctx __ctx; \
567 size_t __event_len, __event_align; \
568 size_t __dynamic_len_idx = 0; \
569 union { \
570 size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
571 char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
572 } __stackvar; \
573 int __ret; \
574 \
575 if (0) \
576 (void) __dynamic_len_idx; /* don't warn if unused */ \
577 if (!_TP_SESSION_CHECK(session, __chan->session)) \
578 return; \
579 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \
580 return; \
581 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \
582 return; \
583 if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
584 return; \
585 if (caa_unlikely(!TP_RCU_LINK_TEST())) \
586 return; \
587 if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \
588 struct lttng_bytecode_runtime *bc_runtime; \
589 int __filter_record = __event->has_enablers_without_bytecode; \
590 \
591 __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
592 _TP_ARGS_DATA_VAR(_args)); \
593 tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
594 if (caa_unlikely(bc_runtime->filter(bc_runtime, \
595 __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
596 __filter_record = 1; \
597 } \
598 if (caa_likely(!__filter_record)) \
599 return; \
600 } \
601 __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
602 _TP_ARGS_DATA_VAR(_args)); \
603 __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
604 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
605 __event_align, -1, __chan->handle); \
606 __ctx.ip = __builtin_return_address(0); \
607 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
608 if (__ret < 0) \
609 return; \
610 _fields \
611 __chan->ops->event_commit(&__ctx); \
612 }
613
614 #include TRACEPOINT_INCLUDE
615
616 #undef __get_dynamic_len
617
618 /*
619 * Stage 5.1 of tracepoint event generation.
620 *
621 * Create probe signature
622 */
623
624 /* Reset all macros within TRACEPOINT_EVENT */
625 #include <lttng/ust-tracepoint-event-reset.h>
626
627 #undef TP_ARGS
628 #define TP_ARGS(...) __VA_ARGS__
629
630 #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__
631
632 #undef TRACEPOINT_EVENT_CLASS
633 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
634 const char __tp_event_signature___##_provider##___##_name[] = \
635 _TP_EXTRACT_STRING2(_args);
636
637 #include TRACEPOINT_INCLUDE
638
639 #undef _TP_EXTRACT_STRING2
640
641 /*
642 * Stage 6 of tracepoint event generation.
643 *
644 * Tracepoint loglevel mapping definition generation. We generate a
645 * symbol for each mapping for a provider/event to ensure at most a 1 to
646 * 1 mapping between events and loglevels. If the symbol is repeated,
647 * the compiler will complain.
648 */
649
650 /* Reset all macros within TRACEPOINT_EVENT */
651 #include <lttng/ust-tracepoint-event-reset.h>
652
653 #undef TRACEPOINT_LOGLEVEL
654 #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
655 static const int _loglevel_value___##__provider##___##__name = __loglevel; \
656 static const int *_loglevel___##__provider##___##__name = \
657 &_loglevel_value___##__provider##___##__name;
658
659 #include TRACEPOINT_INCLUDE
660
661 /*
662 * Stage 6.1 of tracepoint event generation.
663 *
664 * Tracepoint UML URI info.
665 */
666
667 /* Reset all macros within TRACEPOINT_EVENT */
668 #include <lttng/ust-tracepoint-event-reset.h>
669
670 #undef TRACEPOINT_MODEL_EMF_URI
671 #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
672 static const char *_model_emf_uri___##__provider##___##__name = __uri;
673
674 #include TRACEPOINT_INCLUDE
675
676 /*
677 * Stage 7.1 of tracepoint event generation.
678 *
679 * Create events description structures. We use a weakref because
680 * loglevels are optional. If not declared, the event will point to the
681 * a loglevel that contains NULL.
682 */
683
684 /* Reset all macros within TRACEPOINT_EVENT */
685 #include <lttng/ust-tracepoint-event-reset.h>
686
687 #undef TRACEPOINT_EVENT_INSTANCE
688 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
689 static const int * \
690 __ref_loglevel___##_provider##___##_name \
691 __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
692 static const char * \
693 __ref_model_emf_uri___##_provider##___##_name \
694 __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\
695 const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
696 .name = #_provider ":" #_name, \
697 .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
698 .ctx = NULL, \
699 .fields = __event_fields___##_provider##___##_template, \
700 .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
701 .loglevel = &__ref_loglevel___##_provider##___##_name, \
702 .signature = __tp_event_signature___##_provider##___##_template, \
703 .u = { .ext = { .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name } }, \
704 };
705
706 #include TRACEPOINT_INCLUDE
707
708 /*
709 * Stage 7.2 of tracepoint event generation.
710 *
711 * Create array of events.
712 */
713
714 /* Reset all macros within TRACEPOINT_EVENT */
715 #include <lttng/ust-tracepoint-event-reset.h>
716
717 #undef TRACEPOINT_EVENT_INSTANCE
718 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
719 &__event_desc___##_provider##_##_name,
720
721 static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
722 #include TRACEPOINT_INCLUDE
723 };
724
725
726 /*
727 * Stage 8 of tracepoint event generation.
728 *
729 * Create a toplevel descriptor for the whole probe.
730 */
731
732 /* non-const because list head will be modified when registered. */
733 static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
734 .provider = __tp_stringify(TRACEPOINT_PROVIDER),
735 .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
736 .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
737 .head = { NULL, NULL },
738 .lazy_init_head = { NULL, NULL },
739 .lazy = 0,
740 .major = LTTNG_UST_PROVIDER_MAJOR,
741 .minor = LTTNG_UST_PROVIDER_MINOR,
742 };
743
744 static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER);
745
746 /*
747 * Stage 9 of tracepoint event generation.
748 *
749 * Register/unregister probes at module load/unload.
750 *
751 * Generate the constructor as an externally visible symbol for use when
752 * linking the probe statically.
753 *
754 * Register refcount is protected by libc dynamic loader mutex.
755 */
756
757 /* Reset all macros within TRACEPOINT_EVENT */
758 #include <lttng/ust-tracepoint-event-reset.h>
759 static void lttng_ust_notrace __attribute__((constructor))
760 _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void);
761 static void
762 _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
763 {
764 int ret;
765
766 if (_TP_COMBINE_TOKENS(__probe_register_refcount___,
767 TRACEPOINT_PROVIDER)++) {
768 return;
769 }
770 /*
771 * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a
772 * static inline function that ensures every probe PROVIDER
773 * argument match the provider within which they appear. It
774 * calls empty static inline functions, and therefore has no
775 * runtime effect. However, if it detects an error, a linker
776 * error will appear.
777 */
778 _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)();
779 ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
780 if (ret) {
781 fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret);
782 abort();
783 }
784 }
785
786 static void lttng_ust_notrace __attribute__((destructor))
787 _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void);
788 static void
789 _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
790 {
791 if (--_TP_COMBINE_TOKENS(__probe_register_refcount___,
792 TRACEPOINT_PROVIDER)) {
793 return;
794 }
795 lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
796 }
797
798 int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);
This page took 0.045602 seconds and 4 git commands to generate.