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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> | |
24 | #include <urcu/compiler.h> | |
f488575f | 25 | #include <urcu/rculist.h> |
1c324e59 | 26 | #include <lttng/ust-events.h> |
1c324e59 | 27 | #include <lttng/ringbuffer-config.h> |
a8909ba5 | 28 | #include <lttng/ust-compiler.h> |
000b8662 | 29 | #include <lttng/tracepoint.h> |
44c72f10 | 30 | #include <string.h> |
1c324e59 | 31 | |
000b8662 MD |
32 | #undef tp_list_for_each_entry_rcu |
33 | #define tp_list_for_each_entry_rcu(pos, head, member) \ | |
34 | for (pos = cds_list_entry(tp_rcu_dereference_bp((head)->next), __typeof__(*pos), member); \ | |
35 | &pos->member != (head); \ | |
36 | pos = cds_list_entry(tp_rcu_dereference_bp(pos->member.next), __typeof__(*pos), member)) | |
37 | ||
1c324e59 MD |
38 | /* |
39 | * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the | |
40 | * same arguments and having the same field layout. | |
41 | * | |
42 | * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with | |
43 | * its own provider and name. It refers to a class (template). | |
44 | * | |
45 | * TRACEPOINT_EVENT declared both a class and an instance and does a | |
46 | * direct mapping from the instance to the class. | |
47 | */ | |
48 | ||
49 | #undef TRACEPOINT_EVENT | |
50 | #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ | |
51 | TRACEPOINT_EVENT_CLASS(_provider, _name, \ | |
52 | _TP_PARAMS(_args), \ | |
53 | _TP_PARAMS(_fields)) \ | |
54 | TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ | |
68755429 | 55 | _TP_PARAMS(_args)) |
1c324e59 MD |
56 | |
57 | /* Helpers */ | |
58 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
59 | ||
60 | #define _tp_max_t(type, x, y) \ | |
61 | ({ \ | |
62 | type __max1 = (x); \ | |
63 | type __max2 = (y); \ | |
64 | __max1 > __max2 ? __max1: __max2; \ | |
65 | }) | |
66 | ||
67 | /* | |
68 | * Stage 0 of tracepoint event generation. | |
69 | * | |
70 | * Check that each TRACEPOINT_EVENT provider argument match the | |
71 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
72 | */ | |
73 | ||
74 | /* Reset all macros within TRACEPOINT_EVENT */ | |
75 | #include <lttng/ust-tracepoint-event-reset.h> | |
76 | ||
77 | static inline | |
78 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
79 | { | |
80 | } | |
81 | ||
82 | #undef TRACEPOINT_EVENT_CLASS | |
83 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
84 | __tracepoint_provider_mismatch_##_provider(); | |
85 | ||
86 | #undef TRACEPOINT_EVENT_INSTANCE | |
87 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
88 | __tracepoint_provider_mismatch_##_provider(); | |
89 | ||
e8bd1da7 | 90 | static inline |
1c324e59 MD |
91 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) |
92 | { | |
93 | #include TRACEPOINT_INCLUDE | |
94 | } | |
95 | ||
f56cd1d5 MD |
96 | /* |
97 | * Stage 0.1 of tracepoint event generation. | |
98 | * | |
99 | * Check that each TRACEPOINT_EVENT provider:name does not exceed the | |
100 | * tracepoint name length limit. | |
101 | */ | |
102 | ||
103 | /* Reset all macros within TRACEPOINT_EVENT */ | |
104 | #include <lttng/ust-tracepoint-event-reset.h> | |
105 | ||
106 | #undef TRACEPOINT_EVENT_INSTANCE | |
107 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
108 | static const char \ | |
109 | __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \ | |
110 | __attribute__((unused)) = \ | |
111 | #_provider ":" #_name; | |
112 | ||
113 | #include TRACEPOINT_INCLUDE | |
114 | ||
1c324e59 MD |
115 | /* |
116 | * Stage 1 of tracepoint event generation. | |
117 | * | |
118 | * Create event field type metadata section. | |
119 | * Each event produce an array of fields. | |
120 | */ | |
121 | ||
122 | /* Reset all macros within TRACEPOINT_EVENT */ | |
123 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
124 | #include <lttng/ust-tracepoint-event-write.h> |
125 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1c324e59 | 126 | |
4774c8f3 | 127 | #undef _ctf_integer_ext |
180901e6 | 128 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
129 | { \ |
130 | .name = #_item, \ | |
131 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
180901e6 | 132 | .nowrite = _nowrite, \ |
1c324e59 MD |
133 | }, |
134 | ||
4774c8f3 | 135 | #undef _ctf_float |
180901e6 | 136 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
137 | { \ |
138 | .name = #_item, \ | |
139 | .type = __type_float(_type), \ | |
180901e6 | 140 | .nowrite = _nowrite, \ |
1c324e59 MD |
141 | }, |
142 | ||
4774c8f3 | 143 | #undef _ctf_array_encoded |
180901e6 | 144 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
145 | { \ |
146 | .name = #_item, \ | |
147 | .type = \ | |
148 | { \ | |
149 | .atype = atype_array, \ | |
46d52200 | 150 | .u = \ |
1c324e59 | 151 | { \ |
46d52200 ZT |
152 | .array = \ |
153 | { \ | |
154 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
155 | .length = _length, \ | |
156 | } \ | |
157 | } \ | |
1c324e59 | 158 | }, \ |
180901e6 | 159 | .nowrite = _nowrite, \ |
1c324e59 MD |
160 | }, |
161 | ||
4774c8f3 MD |
162 | #undef _ctf_sequence_encoded |
163 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
180901e6 | 164 | _length_type, _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
165 | { \ |
166 | .name = #_item, \ | |
167 | .type = \ | |
168 | { \ | |
169 | .atype = atype_sequence, \ | |
46d52200 | 170 | .u = \ |
1c324e59 | 171 | { \ |
46d52200 ZT |
172 | .sequence = \ |
173 | { \ | |
174 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
175 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
176 | }, \ | |
1c324e59 MD |
177 | }, \ |
178 | }, \ | |
180901e6 | 179 | .nowrite = _nowrite, \ |
1c324e59 MD |
180 | }, |
181 | ||
4774c8f3 | 182 | #undef _ctf_string |
180901e6 | 183 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
184 | { \ |
185 | .name = #_item, \ | |
186 | .type = \ | |
187 | { \ | |
188 | .atype = atype_string, \ | |
46d52200 ZT |
189 | .u = \ |
190 | { \ | |
191 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
192 | }, \ | |
1c324e59 | 193 | }, \ |
180901e6 | 194 | .nowrite = _nowrite, \ |
1c324e59 MD |
195 | }, |
196 | ||
197 | #undef TP_FIELDS | |
2eda209b | 198 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
199 | |
200 | #undef TRACEPOINT_EVENT_CLASS | |
201 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
202 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
203 | _fields \ | |
204 | }; | |
205 | ||
206 | #include TRACEPOINT_INCLUDE | |
207 | ||
208 | /* | |
209 | * Stage 2 of tracepoint event generation. | |
210 | * | |
211 | * Create probe callback prototypes. | |
212 | */ | |
213 | ||
214 | /* Reset all macros within TRACEPOINT_EVENT */ | |
215 | #include <lttng/ust-tracepoint-event-reset.h> | |
216 | ||
217 | #undef TP_ARGS | |
2eda209b | 218 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
219 | |
220 | #undef TRACEPOINT_EVENT_CLASS | |
221 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
222 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
223 | ||
224 | #include TRACEPOINT_INCLUDE | |
225 | ||
226 | /* | |
227 | * Stage 3 of tracepoint event generation. | |
228 | * | |
1c324e59 MD |
229 | * Create static inline function that calculates event size. |
230 | */ | |
231 | ||
232 | /* Reset all macros within TRACEPOINT_EVENT */ | |
233 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 234 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 235 | |
4774c8f3 | 236 | #undef _ctf_integer_ext |
180901e6 | 237 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
238 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
239 | __event_len += sizeof(_type); | |
240 | ||
4774c8f3 | 241 | #undef _ctf_float |
180901e6 | 242 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
243 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
244 | __event_len += sizeof(_type); | |
245 | ||
4774c8f3 | 246 | #undef _ctf_array_encoded |
180901e6 | 247 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
248 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
249 | __event_len += sizeof(_type) * (_length); | |
250 | ||
4774c8f3 MD |
251 | #undef _ctf_sequence_encoded |
252 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 253 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
254 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
255 | __event_len += sizeof(_length_type); \ | |
256 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
257 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
258 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
259 | __dynamic_len_idx++; | |
260 | ||
4774c8f3 | 261 | #undef _ctf_string |
180901e6 | 262 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
263 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
264 | ||
265 | #undef TP_ARGS | |
2eda209b | 266 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
267 | |
268 | #undef TP_FIELDS | |
2eda209b | 269 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
270 | |
271 | #undef TRACEPOINT_EVENT_CLASS | |
a8909ba5 PW |
272 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ |
273 | static inline lttng_ust_notrace \ | |
274 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \ | |
275 | static inline \ | |
276 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 MD |
277 | { \ |
278 | size_t __event_len = 0; \ | |
279 | unsigned int __dynamic_len_idx = 0; \ | |
280 | \ | |
281 | if (0) \ | |
282 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
283 | _fields \ | |
284 | return __event_len; \ | |
285 | } | |
286 | ||
287 | #include TRACEPOINT_INCLUDE | |
288 | ||
1ddfd641 MD |
289 | /* |
290 | * Stage 3.1 of tracepoint event generation. | |
291 | * | |
292 | * Create static inline function that layout the filter stack data. | |
4774c8f3 | 293 | * We make both write and nowrite data available to the filter. |
1ddfd641 MD |
294 | */ |
295 | ||
296 | /* Reset all macros within TRACEPOINT_EVENT */ | |
297 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
298 | #include <lttng/ust-tracepoint-event-write.h> |
299 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1ddfd641 | 300 | |
4774c8f3 | 301 | #undef _ctf_integer_ext |
180901e6 | 302 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
fa099471 MD |
303 | if (lttng_is_signed_type(_type)) { \ |
304 | int64_t __ctf_tmp_int64 = (int64_t) (_type) (_src); \ | |
305 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
306 | } else { \ | |
307 | uint64_t __ctf_tmp_uint64 = (uint64_t) (_type) (_src); \ | |
308 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
309 | } \ | |
1ddfd641 MD |
310 | __stack_data += sizeof(int64_t); |
311 | ||
4774c8f3 | 312 | #undef _ctf_float |
180901e6 | 313 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
fa099471 MD |
314 | { \ |
315 | double __ctf_tmp_double = (double) (_type) (_src); \ | |
316 | memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \ | |
317 | __stack_data += sizeof(double); \ | |
318 | } | |
1ddfd641 | 319 | |
4774c8f3 | 320 | #undef _ctf_array_encoded |
180901e6 | 321 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
fa099471 MD |
322 | { \ |
323 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
59034aab | 324 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
325 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
326 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 327 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
328 | __stack_data += sizeof(void **); \ |
329 | } | |
1ddfd641 | 330 | |
4774c8f3 MD |
331 | #undef _ctf_sequence_encoded |
332 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 333 | _src_length, _encoding, _nowrite) \ |
fa099471 MD |
334 | { \ |
335 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
59034aab | 336 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
337 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
338 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 339 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
340 | __stack_data += sizeof(void **); \ |
341 | } | |
1ddfd641 | 342 | |
4774c8f3 | 343 | #undef _ctf_string |
180901e6 | 344 | #define _ctf_string(_item, _src, _nowrite) \ |
fa099471 | 345 | { \ |
59034aab | 346 | const void *__ctf_tmp_ptr = (_src); \ |
c4261b0a | 347 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
27f4b609 | 348 | __stack_data += sizeof(void **); \ |
fa099471 | 349 | } |
1ddfd641 MD |
350 | |
351 | #undef TP_ARGS | |
352 | #define TP_ARGS(...) __VA_ARGS__ | |
353 | ||
354 | #undef TP_FIELDS | |
355 | #define TP_FIELDS(...) __VA_ARGS__ | |
356 | ||
357 | #undef TRACEPOINT_EVENT_CLASS | |
358 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
359 | static inline \ | |
360 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
361 | _TP_ARGS_DATA_PROTO(_args)) \ | |
362 | { \ | |
363 | _fields \ | |
364 | } | |
365 | ||
366 | #include TRACEPOINT_INCLUDE | |
367 | ||
368 | ||
369 | ||
1c324e59 | 370 | /* |
df854e41 | 371 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
372 | * |
373 | * Create static inline function that calculates event payload alignment. | |
374 | */ | |
375 | ||
376 | /* Reset all macros within TRACEPOINT_EVENT */ | |
377 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 378 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 379 | |
4774c8f3 | 380 | #undef _ctf_integer_ext |
180901e6 | 381 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
382 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
383 | ||
4774c8f3 | 384 | #undef _ctf_float |
180901e6 | 385 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
386 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
387 | ||
4774c8f3 | 388 | #undef _ctf_array_encoded |
180901e6 | 389 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
390 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
391 | ||
4774c8f3 MD |
392 | #undef _ctf_sequence_encoded |
393 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 394 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
395 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
396 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
397 | ||
4774c8f3 | 398 | #undef _ctf_string |
180901e6 | 399 | #define _ctf_string(_item, _src, _nowrite) |
1c324e59 MD |
400 | |
401 | #undef TP_ARGS | |
2eda209b | 402 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
403 | |
404 | #undef TP_FIELDS | |
2eda209b | 405 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
406 | |
407 | #undef TRACEPOINT_EVENT_CLASS | |
408 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
409 | static inline lttng_ust_notrace \ |
410 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \ | |
1c324e59 MD |
411 | static inline \ |
412 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
413 | { \ | |
414 | size_t __event_align = 1; \ | |
415 | _fields \ | |
416 | return __event_align; \ | |
417 | } | |
418 | ||
419 | #include TRACEPOINT_INCLUDE | |
420 | ||
421 | ||
422 | /* | |
df854e41 | 423 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
424 | * |
425 | * Create the probe function. This function calls event size calculation | |
426 | * and writes event data into the buffer. | |
427 | */ | |
428 | ||
429 | /* Reset all macros within TRACEPOINT_EVENT */ | |
430 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 431 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 432 | |
4774c8f3 | 433 | #undef _ctf_integer_ext |
180901e6 | 434 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
435 | { \ |
436 | _type __tmp = (_src); \ | |
437 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
438 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
439 | } | |
440 | ||
4774c8f3 | 441 | #undef _ctf_float |
180901e6 | 442 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
443 | { \ |
444 | _type __tmp = (_src); \ | |
445 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
446 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
447 | } | |
448 | ||
4774c8f3 | 449 | #undef _ctf_array_encoded |
180901e6 | 450 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
451 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
452 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
453 | ||
4774c8f3 MD |
454 | #undef _ctf_sequence_encoded |
455 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 456 | _src_length, _encoding, _nowrite) \ |
1c324e59 | 457 | { \ |
d71b57b9 | 458 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
459 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
460 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
461 | } \ | |
462 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
463 | __chan->ops->event_write(&__ctx, _src, \ | |
464 | sizeof(_type) * __get_dynamic_len(dest)); | |
465 | ||
4774c8f3 | 466 | #undef _ctf_string |
180901e6 | 467 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
468 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
469 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
470 | ||
471 | /* Beware: this get len actually consumes the len value */ | |
472 | #undef __get_dynamic_len | |
d71b57b9 | 473 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
474 | |
475 | #undef TP_ARGS | |
2eda209b | 476 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
477 | |
478 | #undef TP_FIELDS | |
2eda209b | 479 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 480 | |
1ddfd641 MD |
481 | /* |
482 | * Using twice size for filter stack data to hold size and pointer for | |
483 | * each field (worse case). For integers, max size required is 64-bit. | |
484 | * Same for double-precision floats. Those fit within | |
485 | * 2*sizeof(unsigned long) for all supported architectures. | |
61ce3223 | 486 | * Perform UNION (||) of filter runtime list. |
1ddfd641 | 487 | */ |
1c324e59 MD |
488 | #undef TRACEPOINT_EVENT_CLASS |
489 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
490 | static lttng_ust_notrace \ |
491 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \ | |
492 | static \ | |
493 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 | 494 | { \ |
46d52200 | 495 | struct lttng_event *__event = (struct lttng_event *) __tp_data; \ |
7dd08bec | 496 | struct lttng_channel *__chan = __event->chan; \ |
f280cb51 | 497 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
498 | size_t __event_len, __event_align; \ |
499 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 500 | union { \ |
1ddfd641 MD |
501 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
502 | char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
d71b57b9 | 503 | } __stackvar; \ |
1c324e59 MD |
504 | int __ret; \ |
505 | \ | |
506 | if (0) \ | |
507 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
508 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
509 | return; \ | |
510 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
511 | return; \ | |
512 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
513 | return; \ | |
1b436e01 MD |
514 | if (caa_unlikely(!TP_RCU_LINK_TEST())) \ |
515 | return; \ | |
e58095ef | 516 | if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \ |
f488575f | 517 | struct lttng_bytecode_runtime *bc_runtime; \ |
dcdeaff0 | 518 | int __filter_record = __event->has_enablers_without_bytecode; \ |
f488575f | 519 | \ |
1ddfd641 | 520 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ |
f488575f | 521 | _TP_ARGS_DATA_VAR(_args)); \ |
000b8662 | 522 | tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
61ce3223 | 523 | if (caa_unlikely(bc_runtime->filter(bc_runtime, \ |
8a92ed2a MD |
524 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
525 | __filter_record = 1; \ | |
f488575f | 526 | } \ |
8a92ed2a | 527 | if (caa_likely(!__filter_record)) \ |
61ce3223 | 528 | return; \ |
1ddfd641 MD |
529 | } \ |
530 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
531 | _TP_ARGS_DATA_VAR(_args)); \ |
532 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
533 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
534 | __event_align, -1, __chan->handle); \ | |
535 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
536 | if (__ret < 0) \ | |
537 | return; \ | |
538 | _fields \ | |
539 | __chan->ops->event_commit(&__ctx); \ | |
540 | } | |
541 | ||
542 | #include TRACEPOINT_INCLUDE | |
543 | ||
544 | #undef __get_dynamic_len | |
545 | ||
68755429 MD |
546 | /* |
547 | * Stage 5.1 of tracepoint event generation. | |
548 | * | |
549 | * Create probe signature | |
550 | */ | |
551 | ||
552 | /* Reset all macros within TRACEPOINT_EVENT */ | |
553 | #include <lttng/ust-tracepoint-event-reset.h> | |
554 | ||
555 | #undef TP_ARGS | |
2eda209b | 556 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
557 | |
558 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
559 | |
560 | #undef TRACEPOINT_EVENT_CLASS | |
561 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
562 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
9eb06182 | 563 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
564 | |
565 | #include TRACEPOINT_INCLUDE | |
566 | ||
9eb06182 MD |
567 | #undef _TP_EXTRACT_STRING2 |
568 | ||
05ceaafd | 569 | /* |
882a56d7 | 570 | * Stage 6 of tracepoint event generation. |
1c324e59 | 571 | * |
df854e41 MD |
572 | * Tracepoint loglevel mapping definition generation. We generate a |
573 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
574 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
575 | * the compiler will complain. | |
05ceaafd MD |
576 | */ |
577 | ||
578 | /* Reset all macros within TRACEPOINT_EVENT */ | |
579 | #include <lttng/ust-tracepoint-event-reset.h> | |
580 | ||
581 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
582 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
583 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
584 | static const int *_loglevel___##__provider##___##__name = \ | |
585 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
586 | |
587 | #include TRACEPOINT_INCLUDE | |
588 | ||
6ddc916d MD |
589 | /* |
590 | * Stage 6.1 of tracepoint event generation. | |
591 | * | |
592 | * Tracepoint UML URI info. | |
593 | */ | |
594 | ||
595 | /* Reset all macros within TRACEPOINT_EVENT */ | |
596 | #include <lttng/ust-tracepoint-event-reset.h> | |
597 | ||
598 | #undef TRACEPOINT_MODEL_EMF_URI | |
599 | #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \ | |
600 | static const char *_model_emf_uri___##__provider##___##__name = __uri; | |
601 | ||
602 | #include TRACEPOINT_INCLUDE | |
603 | ||
df854e41 | 604 | /* |
882a56d7 | 605 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
606 | * |
607 | * Create events description structures. We use a weakref because | |
608 | * loglevels are optional. If not declared, the event will point to the | |
609 | * a loglevel that contains NULL. | |
610 | */ | |
611 | ||
612 | /* Reset all macros within TRACEPOINT_EVENT */ | |
613 | #include <lttng/ust-tracepoint-event-reset.h> | |
614 | ||
615 | #undef TRACEPOINT_EVENT_INSTANCE | |
616 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
617 | static const int * \ |
618 | __ref_loglevel___##_provider##___##_name \ | |
619 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
6ddc916d MD |
620 | static const char * \ |
621 | __ref_model_emf_uri___##_provider##___##_name \ | |
622 | __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\ | |
df854e41 | 623 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
df854e41 | 624 | .name = #_provider ":" #_name, \ |
fbdeb5ec | 625 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
46d52200 ZT |
626 | .ctx = NULL, \ |
627 | .fields = __event_fields___##_provider##___##_template, \ | |
df854e41 | 628 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 629 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 630 | .signature = __tp_event_signature___##_provider##___##_template, \ |
46d52200 | 631 | .u = { .ext = { .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name } }, \ |
df854e41 MD |
632 | }; |
633 | ||
634 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 635 | |
df854e41 | 636 | /* |
882a56d7 | 637 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
638 | * |
639 | * Create array of events. | |
640 | */ | |
641 | ||
642 | /* Reset all macros within TRACEPOINT_EVENT */ | |
643 | #include <lttng/ust-tracepoint-event-reset.h> | |
644 | ||
645 | #undef TRACEPOINT_EVENT_INSTANCE | |
646 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
647 | &__event_desc___##_provider##_##_name, | |
648 | ||
649 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
650 | #include TRACEPOINT_INCLUDE |
651 | }; | |
652 | ||
df854e41 | 653 | |
05ceaafd | 654 | /* |
882a56d7 | 655 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
656 | * |
657 | * Create a toplevel descriptor for the whole probe. | |
658 | */ | |
659 | ||
660 | /* non-const because list head will be modified when registered. */ | |
661 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 662 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
663 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
664 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
46d52200 ZT |
665 | .head = { NULL, NULL }, |
666 | .lazy_init_head = { NULL, NULL }, | |
667 | .lazy = 0, | |
71d31690 MD |
668 | .major = LTTNG_UST_PROVIDER_MAJOR, |
669 | .minor = LTTNG_UST_PROVIDER_MINOR, | |
05ceaafd MD |
670 | }; |
671 | ||
672 | /* | |
882a56d7 | 673 | * Stage 9 of tracepoint event generation. |
05ceaafd | 674 | * |
1c324e59 | 675 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
676 | * |
677 | * Generate the constructor as an externally visible symbol for use when | |
678 | * linking the probe statically. | |
1c324e59 MD |
679 | */ |
680 | ||
681 | /* Reset all macros within TRACEPOINT_EVENT */ | |
682 | #include <lttng/ust-tracepoint-event-reset.h> | |
a8909ba5 PW |
683 | static void lttng_ust_notrace __attribute__((constructor)) |
684 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void); | |
685 | static void | |
1c324e59 MD |
686 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
687 | { | |
688 | int ret; | |
689 | ||
e8bd1da7 MD |
690 | /* |
691 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
692 | * static inline function that ensures every probe PROVIDER | |
693 | * argument match the provider within which they appear. It | |
694 | * calls empty static inline functions, and therefore has no | |
695 | * runtime effect. However, if it detects an error, a linker | |
696 | * error will appear. | |
697 | */ | |
698 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
7dd08bec | 699 | ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 MD |
700 | assert(!ret); |
701 | } | |
702 | ||
a8909ba5 PW |
703 | static void lttng_ust_notrace __attribute__((destructor)) |
704 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void); | |
705 | static void | |
1c324e59 MD |
706 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
707 | { | |
7dd08bec | 708 | lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 | 709 | } |
628e1d81 MD |
710 | |
711 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |