projects / lttng-ust.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Fix: missing _GNU_SOURCE define
[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
23#include <stdio.h>
7d381d6e 24#include <stdlib.h>
1c324e59 25#include <urcu/compiler.h>
f488575f 26#include <urcu/rculist.h>
1c324e59 27#include <lttng/ust-events.h>
1c324e59 28#include <lttng/ringbuffer-config.h>
a8909ba5 29#include <lttng/ust-compiler.h>
000b8662 30#include <lttng/tracepoint.h>
44c72f10 31#include <string.h>
1c324e59 32
000b8662
MD		 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
1c324e59
MD		 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, \
68755429 56 _TP_PARAMS(_args))
1c324e59
MD		 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
7ce6b21d
PW		 78static inline lttng_ust_notrace
79void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void);
1c324e59
MD		 80static inline
81void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
82{
83}
84
85#undef TRACEPOINT_EVENT_CLASS
86#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
87 __tracepoint_provider_mismatch_##_provider();
88
89#undef TRACEPOINT_EVENT_INSTANCE
90#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
91 __tracepoint_provider_mismatch_##_provider();
92
7ce6b21d
PW		 93static inline lttng_ust_notrace
94void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void);
e8bd1da7 95static inline
1c324e59
MD		 96void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
97{
98#include TRACEPOINT_INCLUDE
99}
100
f56cd1d5
MD		 101/*
102 * Stage 0.1 of tracepoint event generation.
103 *
104 * Check that each TRACEPOINT_EVENT provider:name does not exceed the
105 * tracepoint name length limit.
106 */
107
108/* Reset all macros within TRACEPOINT_EVENT */
109#include <lttng/ust-tracepoint-event-reset.h>
110
111#undef TRACEPOINT_EVENT_INSTANCE
112#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
113static const char \
114 __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
115 __attribute__((unused)) = \
116 #_provider ":" #_name;
117
118#include TRACEPOINT_INCLUDE
119
1c324e59
MD		 120/*
121 * Stage 1 of tracepoint event generation.
122 *
123 * Create event field type metadata section.
124 * Each event produce an array of fields.
125 */
126
127/* Reset all macros within TRACEPOINT_EVENT */
128#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3
MD		 129#include <lttng/ust-tracepoint-event-write.h>
130#include <lttng/ust-tracepoint-event-nowrite.h>
1c324e59 131
4774c8f3 132#undef _ctf_integer_ext
180901e6 133#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 134 { \
135 .name = #_item, \
136 .type = __type_integer(_type, _byte_order, _base, none),\
180901e6 137 .nowrite = _nowrite, \
1c324e59
MD		 138 },
139
4774c8f3 140#undef _ctf_float
180901e6 141#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 142 { \
143 .name = #_item, \
144 .type = __type_float(_type), \
180901e6 145 .nowrite = _nowrite, \
1c324e59
MD		 146 },
147
4774c8f3 148#undef _ctf_array_encoded
180901e6 149#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
1c324e59
MD		 150 { \
151 .name = #_item, \
152 .type = \
153 { \
154 .atype = atype_array, \
46d52200 155 .u = \
1c324e59 156 { \
46d52200
ZT		 157 .array = \
158 { \
159 .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
160 .length = _length, \
161 } \
162 } \
1c324e59 163 }, \
180901e6 164 .nowrite = _nowrite, \
1c324e59
MD		 165 },
166
4774c8f3 167#undef _ctf_sequence_encoded
f968510a
PP		 168#define _ctf_sequence_encoded(_type, _item, _src, \
169 _length_type, _src_length, _encoding, _nowrite, \
170 _elem_type_base) \
1c324e59
MD		 171 { \
172 .name = #_item, \
173 .type = \
174 { \
175 .atype = atype_sequence, \
46d52200 176 .u = \
1c324e59 177 { \
46d52200
ZT		 178 .sequence = \
179 { \
180 .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
f968510a 181 .elem_type = __type_integer(_type, BYTE_ORDER, _elem_type_base, _encoding), \
46d52200 182 }, \
1c324e59
MD		 183 }, \
184 }, \
180901e6 185 .nowrite = _nowrite, \
1c324e59
MD		 186 },
187
4774c8f3 188#undef _ctf_string
180901e6 189#define _ctf_string(_item, _src, _nowrite) \
1c324e59
MD		 190 { \
191 .name = #_item, \
192 .type = \
193 { \
194 .atype = atype_string, \
46d52200
ZT		 195 .u = \
196 { \
197 .basic = { .string = { .encoding = lttng_encode_UTF8 } } \
198 }, \
1c324e59 199 }, \
180901e6 200 .nowrite = _nowrite, \
1c324e59
MD		 201 },
202
203#undef TP_FIELDS
2eda209b 204#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
1c324e59
MD		 205
206#undef TRACEPOINT_EVENT_CLASS
207#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
208 static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
209 _fields \
210 };
211
212#include TRACEPOINT_INCLUDE
213
214/*
215 * Stage 2 of tracepoint event generation.
216 *
217 * Create probe callback prototypes.
218 */
219
220/* Reset all macros within TRACEPOINT_EVENT */
221#include <lttng/ust-tracepoint-event-reset.h>
222
223#undef TP_ARGS
2eda209b 224#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 225
226#undef TRACEPOINT_EVENT_CLASS
227#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
228static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
229
230#include TRACEPOINT_INCLUDE
231
232/*
233 * Stage 3 of tracepoint event generation.
234 *
1c324e59
MD		 235 * Create static inline function that calculates event size.
236 */
237
238/* Reset all macros within TRACEPOINT_EVENT */
239#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 240#include <lttng/ust-tracepoint-event-write.h>
1c324e59 241
4774c8f3 242#undef _ctf_integer_ext
180901e6 243#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 244 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
245 __event_len += sizeof(_type);
246
4774c8f3 247#undef _ctf_float
180901e6 248#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 249 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
250 __event_len += sizeof(_type);
251
4774c8f3 252#undef _ctf_array_encoded
180901e6 253#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
1c324e59
MD		 254 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
255 __event_len += sizeof(_type) * (_length);
256
4774c8f3 257#undef _ctf_sequence_encoded
f968510a
PP		 258#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
259 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 260 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
261 __event_len += sizeof(_length_type); \
262 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
263 __dynamic_len[__dynamic_len_idx] = (_src_length); \
264 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
265 __dynamic_len_idx++;
266
4774c8f3 267#undef _ctf_string
180901e6 268#define _ctf_string(_item, _src, _nowrite) \
1c324e59
MD		 269 __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
270
271#undef TP_ARGS
2eda209b 272#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 273
274#undef TP_FIELDS
2eda209b 275#define TP_FIELDS(...) __VA_ARGS__
1c324e59
MD		 276
277#undef TRACEPOINT_EVENT_CLASS
a8909ba5
PW		 278#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
279static inline lttng_ust_notrace \
280size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \
281static inline \
282size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
1c324e59
MD		 283{ \
284 size_t __event_len = 0; \
285 unsigned int __dynamic_len_idx = 0; \
286 \
287 if (0) \
288 (void) __dynamic_len_idx; /* don't warn if unused */ \
289 _fields \
290 return __event_len; \
291}
292
293#include TRACEPOINT_INCLUDE
294
1ddfd641
MD		 295/*
296 * Stage 3.1 of tracepoint event generation.
297 *
298 * Create static inline function that layout the filter stack data.
4774c8f3 299 * We make both write and nowrite data available to the filter.
1ddfd641
MD		 300 */
301
302/* Reset all macros within TRACEPOINT_EVENT */
303#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3
MD		 304#include <lttng/ust-tracepoint-event-write.h>
305#include <lttng/ust-tracepoint-event-nowrite.h>
1ddfd641 306
4774c8f3 307#undef _ctf_integer_ext
180901e6 308#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
fa099471 309 if (lttng_is_signed_type(_type)) { \
3ebeea0d
MD		 310 int64_t __ctf_tmp_int64; \
311 switch (sizeof(_type)) { \
312 case 1: \
313 { \
314 union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
315 __ctf_tmp_int64 = (int64_t) __tmp.v; \
316 break; \
317 } \
318 case 2: \
319 { \
320 union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
321 __ctf_tmp_int64 = (int64_t) __tmp.v; \
322 break; \
323 } \
324 case 4: \
325 { \
326 union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
327 __ctf_tmp_int64 = (int64_t) __tmp.v; \
328 break; \
329 } \
330 case 8: \
331 { \
332 union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
333 __ctf_tmp_int64 = (int64_t) __tmp.v; \
334 break; \
335 } \
336 default: \
337 abort(); \
338 }; \
fa099471
MD		 339 memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
340 } else { \
3ebeea0d
MD		 341 uint64_t __ctf_tmp_uint64; \
342 switch (sizeof(_type)) { \
343 case 1: \
344 { \
345 union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
346 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
347 break; \
348 } \
349 case 2: \
350 { \
351 union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
352 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
353 break; \
354 } \
355 case 4: \
356 { \
357 union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
358 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
359 break; \
360 } \
361 case 8: \
362 { \
363 union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
364 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
365 break; \
366 } \
367 default: \
368 abort(); \
369 }; \
fa099471
MD		 370 memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
371 } \
1ddfd641
MD		 372 __stack_data += sizeof(int64_t);
373
4774c8f3 374#undef _ctf_float
180901e6 375#define _ctf_float(_type, _item, _src, _nowrite) \
fa099471
MD		 376 { \
377 double __ctf_tmp_double = (double) (_type) (_src); \
378 memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \
379 __stack_data += sizeof(double); \
380 }
1ddfd641 381
4774c8f3 382#undef _ctf_array_encoded
180901e6 383#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
fa099471
MD		 384 { \
385 unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
59034aab 386 const void *__ctf_tmp_ptr = (_src); \
fa099471
MD		 387 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
388 __stack_data += sizeof(unsigned long); \
b1239ad6
MD		 389 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
390 __stack_data += sizeof(void *); \
fa099471 391 }
1ddfd641 392
4774c8f3
MD		 393#undef _ctf_sequence_encoded
394#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
f968510a 395 _src_length, _encoding, _nowrite, _elem_type_base) \
fa099471
MD		 396 { \
397 unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
59034aab 398 const void *__ctf_tmp_ptr = (_src); \
fa099471
MD		 399 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
400 __stack_data += sizeof(unsigned long); \
b1239ad6
MD		 401 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
402 __stack_data += sizeof(void *); \
fa099471 403 }
1ddfd641 404
4774c8f3 405#undef _ctf_string
180901e6 406#define _ctf_string(_item, _src, _nowrite) \
fa099471 407 { \
59034aab 408 const void *__ctf_tmp_ptr = (_src); \
b1239ad6
MD		 409 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
410 __stack_data += sizeof(void *); \
fa099471 411 }
1ddfd641
MD		 412
413#undef TP_ARGS
414#define TP_ARGS(...) __VA_ARGS__
415
416#undef TP_FIELDS
417#define TP_FIELDS(...) __VA_ARGS__
418
419#undef TRACEPOINT_EVENT_CLASS
420#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
421static inline \
422void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\
423 _TP_ARGS_DATA_PROTO(_args)) \
424{ \
425 _fields \
426}
427
428#include TRACEPOINT_INCLUDE
429
430
431
1c324e59 432/*
df854e41 433 * Stage 4 of tracepoint event generation.
1c324e59
MD		 434 *
435 * Create static inline function that calculates event payload alignment.
436 */
437
438/* Reset all macros within TRACEPOINT_EVENT */
439#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 440#include <lttng/ust-tracepoint-event-write.h>
1c324e59 441
4774c8f3 442#undef _ctf_integer_ext
180901e6 443#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 444 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
445
4774c8f3 446#undef _ctf_float
180901e6 447#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 448 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
449
4774c8f3 450#undef _ctf_array_encoded
180901e6 451#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
1c324e59
MD		 452 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
453
4774c8f3 454#undef _ctf_sequence_encoded
f968510a
PP		 455#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
456 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59
MD		 457 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \
458 __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
459
4774c8f3 460#undef _ctf_string
180901e6 461#define _ctf_string(_item, _src, _nowrite)
1c324e59
MD		 462
463#undef TP_ARGS
2eda209b 464#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 465
466#undef TP_FIELDS
2eda209b 467#define TP_FIELDS(...) __VA_ARGS__
1c324e59
MD		 468
469#undef TRACEPOINT_EVENT_CLASS
470#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
a8909ba5
PW		 471static inline lttng_ust_notrace \
472size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \
1c324e59
MD		 473static inline \
474size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
475{ \
476 size_t __event_align = 1; \
477 _fields \
478 return __event_align; \
479}
480
481#include TRACEPOINT_INCLUDE
482
483
484/*
df854e41 485 * Stage 5 of tracepoint event generation.
1c324e59
MD		 486 *
487 * Create the probe function. This function calls event size calculation
488 * and writes event data into the buffer.
489 */
490
491/* Reset all macros within TRACEPOINT_EVENT */
492#include <lttng/ust-tracepoint-event-reset.h>
4774c8f3 493#include <lttng/ust-tracepoint-event-write.h>
1c324e59 494
4774c8f3 495#undef _ctf_integer_ext
180901e6 496#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
1c324e59
MD		 497 { \
498 _type __tmp = (_src); \
499 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
500 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
501 }
502
4774c8f3 503#undef _ctf_float
180901e6 504#define _ctf_float(_type, _item, _src, _nowrite) \
1c324e59
MD		 505 { \
506 _type __tmp = (_src); \
507 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
508 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
509 }
510
4774c8f3 511#undef _ctf_array_encoded
180901e6 512#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
1c324e59
MD		 513 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
514 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));
515
4774c8f3
MD		 516#undef _ctf_sequence_encoded
517#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
f968510a 518 _src_length, _encoding, _nowrite, _elem_type_base) \
1c324e59 519 { \
d71b57b9 520 _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
1c324e59
MD		 521 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
522 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
523 } \
524 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
525 __chan->ops->event_write(&__ctx, _src, \
526 sizeof(_type) * __get_dynamic_len(dest));
527
a44c74d9
MD		 528/*
529 * __chan->ops->u.has_strcpy is a flag letting us know if the LTTng-UST
530 * tracepoint provider ABI implements event_strcpy. This dynamic check
531 * can be removed when the tracepoint provider ABI moves to 2.
532 */
533#if (LTTNG_UST_PROVIDER_MAJOR > 1)
534#error "Tracepoint probe provider major version has changed. Please remove dynamic check for has_strcpy."
535#endif
536
4774c8f3 537#undef _ctf_string
180901e6 538#define _ctf_string(_item, _src, _nowrite) \
1c324e59 539 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \
a44c74d9
MD		 540 if (__chan->ops->u.has_strcpy) \
541 __chan->ops->event_strcpy(&__ctx, _src, \
542 __get_dynamic_len(dest)); \
543 else \
544 __chan->ops->event_write(&__ctx, _src, \
545 __get_dynamic_len(dest));
1c324e59
MD		 546
547/* Beware: this get len actually consumes the len value */
548#undef __get_dynamic_len
d71b57b9 549#define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
1c324e59
MD		 550
551#undef TP_ARGS
2eda209b 552#define TP_ARGS(...) __VA_ARGS__
1c324e59
MD		 553
554#undef TP_FIELDS
2eda209b 555#define TP_FIELDS(...) __VA_ARGS__
1c324e59 556
95c25348
PW		 557/*
558 * For state dump, check that "session" argument (mandatory) matches the
559 * session this event belongs to. Ensures that we write state dump data only
560 * into the started session, not into all sessions.
561 */
562#undef _TP_SESSION_CHECK
563#ifdef TP_SESSION_CHECK
564#define _TP_SESSION_CHECK(session, csession) (session == csession)
565#else /* TP_SESSION_CHECK */
566#define _TP_SESSION_CHECK(session, csession) 1
567#endif /* TP_SESSION_CHECK */
568
5dadb547
MD		 569#undef _TP_IP_PARAM
570#ifdef TP_IP_PARAM
e1d09f9e 571#define _TP_IP_PARAM(x) (x)
5dadb547 572#else /* TP_IP_PARAM */
e1d09f9e 573#define _TP_IP_PARAM(x) __builtin_return_address(0)
5dadb547
MD		 574#endif /* TP_IP_PARAM */
575
1ddfd641
MD		 576/*
577 * Using twice size for filter stack data to hold size and pointer for
578 * each field (worse case). For integers, max size required is 64-bit.
579 * Same for double-precision floats. Those fit within
580 * 2*sizeof(unsigned long) for all supported architectures.
61ce3223 581 * Perform UNION (||) of filter runtime list.
1ddfd641 582 */
1c324e59
MD		 583#undef TRACEPOINT_EVENT_CLASS
584#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
a8909ba5
PW		 585static lttng_ust_notrace \
586void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \
587static \
588void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \
1c324e59 589{ \
46d52200 590 struct lttng_event *__event = (struct lttng_event *) __tp_data; \
7dd08bec 591 struct lttng_channel *__chan = __event->chan; \
f280cb51 592 struct lttng_ust_lib_ring_buffer_ctx __ctx; \
1c324e59
MD		 593 size_t __event_len, __event_align; \
594 size_t __dynamic_len_idx = 0; \
d71b57b9 595 union { \
1ddfd641
MD		 596 size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
597 char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
d71b57b9 598 } __stackvar; \
1c324e59
MD		 599 int __ret; \
600 \
601 if (0) \
602 (void) __dynamic_len_idx; /* don't warn if unused */ \
95c25348
PW		 603 if (!_TP_SESSION_CHECK(session, __chan->session)) \
604 return; \
1c324e59
MD		 605 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \
606 return; \
607 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \
608 return; \
609 if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
610 return; \
1b436e01
MD		 611 if (caa_unlikely(!TP_RCU_LINK_TEST())) \
612 return; \
e58095ef 613 if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \
f488575f 614 struct lttng_bytecode_runtime *bc_runtime; \
dcdeaff0 615 int __filter_record = __event->has_enablers_without_bytecode; \
f488575f 616 \
1ddfd641 617 __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
f488575f 618 _TP_ARGS_DATA_VAR(_args)); \
000b8662 619 tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
61ce3223 620 if (caa_unlikely(bc_runtime->filter(bc_runtime, \
8a92ed2a
MD		 621 __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
622 __filter_record = 1; \
f488575f 623 } \
8a92ed2a 624 if (caa_likely(!__filter_record)) \
61ce3223 625 return; \
1ddfd641
MD		 626 } \
627 __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
1c324e59
MD		 628 _TP_ARGS_DATA_VAR(_args)); \
629 __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
630 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
631 __event_align, -1, __chan->handle); \
e1d09f9e 632 __ctx.ip = _TP_IP_PARAM(TP_IP_PARAM); \
1c324e59
MD		 633 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
634 if (__ret < 0) \
635 return; \
636 _fields \
637 __chan->ops->event_commit(&__ctx); \
638}
639
640#include TRACEPOINT_INCLUDE
641
642#undef __get_dynamic_len
643
68755429
MD		 644/*
645 * Stage 5.1 of tracepoint event generation.
646 *
647 * Create probe signature
648 */
649
650/* Reset all macros within TRACEPOINT_EVENT */
651#include <lttng/ust-tracepoint-event-reset.h>
652
653#undef TP_ARGS
2eda209b 654#define TP_ARGS(...) __VA_ARGS__
9eb06182
MD		 655
656#define _TP_EXTRACT_STRING2(...) #__VA_ARGS__
68755429
MD		 657
658#undef TRACEPOINT_EVENT_CLASS
659#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
660const char __tp_event_signature___##_provider##___##_name[] = \
9eb06182 661 _TP_EXTRACT_STRING2(_args);
68755429
MD		 662
663#include TRACEPOINT_INCLUDE
664
9eb06182
MD		 665#undef _TP_EXTRACT_STRING2
666
05ceaafd 667/*
882a56d7 668 * Stage 6 of tracepoint event generation.
1c324e59 669 *
df854e41
MD		 670 * Tracepoint loglevel mapping definition generation. We generate a
671 * symbol for each mapping for a provider/event to ensure at most a 1 to
672 * 1 mapping between events and loglevels. If the symbol is repeated,
673 * the compiler will complain.
05ceaafd
MD		 674 */
675
676/* Reset all macros within TRACEPOINT_EVENT */
677#include <lttng/ust-tracepoint-event-reset.h>
678
679#undef TRACEPOINT_LOGLEVEL
457a6b58
MD		 680#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
681static const int _loglevel_value___##__provider##___##__name = __loglevel; \
682static const int *_loglevel___##__provider##___##__name = \
683 &_loglevel_value___##__provider##___##__name;
df854e41
MD		 684
685#include TRACEPOINT_INCLUDE
686
6ddc916d
MD		 687/*
688 * Stage 6.1 of tracepoint event generation.
689 *
690 * Tracepoint UML URI info.
691 */
692
693/* Reset all macros within TRACEPOINT_EVENT */
694#include <lttng/ust-tracepoint-event-reset.h>
695
696#undef TRACEPOINT_MODEL_EMF_URI
697#define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
698static const char *_model_emf_uri___##__provider##___##__name = __uri;
699
700#include TRACEPOINT_INCLUDE
701
df854e41 702/*
882a56d7 703 * Stage 7.1 of tracepoint event generation.
df854e41
MD		 704 *
705 * Create events description structures. We use a weakref because
706 * loglevels are optional. If not declared, the event will point to the
707 * a loglevel that contains NULL.
708 */
709
710/* Reset all macros within TRACEPOINT_EVENT */
711#include <lttng/ust-tracepoint-event-reset.h>
712
713#undef TRACEPOINT_EVENT_INSTANCE
714#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
882a56d7
MD		 715static const int * \
716 __ref_loglevel___##_provider##___##_name \
717 __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
6ddc916d
MD		 718static const char * \
719 __ref_model_emf_uri___##_provider##___##_name \
720 __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\
df854e41 721const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
df854e41 722 .name = #_provider ":" #_name, \
fbdeb5ec 723 .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
46d52200
ZT		 724 .ctx = NULL, \
725 .fields = __event_fields___##_provider##___##_template, \
df854e41 726 .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
882a56d7 727 .loglevel = &__ref_loglevel___##_provider##___##_name, \
68755429 728 .signature = __tp_event_signature___##_provider##___##_template, \
46d52200 729 .u = { .ext = { .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name } }, \
df854e41
MD		 730};
731
732#include TRACEPOINT_INCLUDE
05ceaafd 733
df854e41 734/*
882a56d7 735 * Stage 7.2 of tracepoint event generation.
df854e41
MD		 736 *
737 * Create array of events.
738 */
739
740/* Reset all macros within TRACEPOINT_EVENT */
741#include <lttng/ust-tracepoint-event-reset.h>
742
743#undef TRACEPOINT_EVENT_INSTANCE
744#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
745 &__event_desc___##_provider##_##_name,
746
747static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
05ceaafd
MD		 748#include TRACEPOINT_INCLUDE
749};
750
df854e41 751
05ceaafd 752/*
882a56d7 753 * Stage 8 of tracepoint event generation.
05ceaafd
MD		 754 *
755 * Create a toplevel descriptor for the whole probe.
756 */
757
758/* non-const because list head will be modified when registered. */
759static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
df854e41 760 .provider = __tp_stringify(TRACEPOINT_PROVIDER),
05ceaafd
MD		 761 .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
762 .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
46d52200
ZT		 763 .head = { NULL, NULL },
764 .lazy_init_head = { NULL, NULL },
765 .lazy = 0,
71d31690
MD		 766 .major = LTTNG_UST_PROVIDER_MAJOR,
767 .minor = LTTNG_UST_PROVIDER_MINOR,
05ceaafd
MD		 768};
769
f0cc794d
MD		 770static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER);
771
05ceaafd 772/*
882a56d7 773 * Stage 9 of tracepoint event generation.
05ceaafd 774 *
1c324e59 775 * Register/unregister probes at module load/unload.
628e1d81
MD		 776 *
777 * Generate the constructor as an externally visible symbol for use when
778 * linking the probe statically.
f0cc794d
MD		 779 *
780 * Register refcount is protected by libc dynamic loader mutex.
1c324e59
MD		 781 */
782
783/* Reset all macros within TRACEPOINT_EVENT */
784#include <lttng/ust-tracepoint-event-reset.h>
a8909ba5
PW		 785static void lttng_ust_notrace __attribute__((constructor))
786_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void);
787static void
1c324e59
MD		 788_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
789{
790 int ret;
791
f0cc794d
MD		 792 if (_TP_COMBINE_TOKENS(__probe_register_refcount___,
793 TRACEPOINT_PROVIDER)++) {
794 return;
795 }
e8bd1da7
MD		 796 /*
797 * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a
798 * static inline function that ensures every probe PROVIDER
799 * argument match the provider within which they appear. It
800 * calls empty static inline functions, and therefore has no
801 * runtime effect. However, if it detects an error, a linker
802 * error will appear.
803 */
804 _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)();
7dd08bec 805 ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
7d381d6e
MD		 806 if (ret) {
807 fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret);
808 abort();
809 }
1c324e59
MD		 810}
811
a8909ba5
PW		 812static void lttng_ust_notrace __attribute__((destructor))
813_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void);
814static void
1c324e59
MD		 815_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
816{
f0cc794d
MD		 817 if (--_TP_COMBINE_TOKENS(__probe_register_refcount___,
818 TRACEPOINT_PROVIDER)) {
819 return;
820 }
7dd08bec 821 lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
1c324e59 822}
628e1d81
MD		 823
824int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);
LTTng 2.0 Userspace Tracer
This page took 0.066536 seconds and 4 git commands to generate.