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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> | |
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 | ||
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 | ||
e8bd1da7 | 91 | static inline |
1c324e59 MD |
92 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) |
93 | { | |
94 | #include TRACEPOINT_INCLUDE | |
95 | } | |
96 | ||
f56cd1d5 MD |
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 | ||
1c324e59 MD |
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> | |
4774c8f3 MD |
125 | #include <lttng/ust-tracepoint-event-write.h> |
126 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1c324e59 | 127 | |
4774c8f3 | 128 | #undef _ctf_integer_ext |
180901e6 | 129 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
130 | { \ |
131 | .name = #_item, \ | |
132 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
180901e6 | 133 | .nowrite = _nowrite, \ |
1c324e59 MD |
134 | }, |
135 | ||
4774c8f3 | 136 | #undef _ctf_float |
180901e6 | 137 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
138 | { \ |
139 | .name = #_item, \ | |
140 | .type = __type_float(_type), \ | |
180901e6 | 141 | .nowrite = _nowrite, \ |
1c324e59 MD |
142 | }, |
143 | ||
4774c8f3 | 144 | #undef _ctf_array_encoded |
180901e6 | 145 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
146 | { \ |
147 | .name = #_item, \ | |
148 | .type = \ | |
149 | { \ | |
150 | .atype = atype_array, \ | |
46d52200 | 151 | .u = \ |
1c324e59 | 152 | { \ |
46d52200 ZT |
153 | .array = \ |
154 | { \ | |
155 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
156 | .length = _length, \ | |
157 | } \ | |
158 | } \ | |
1c324e59 | 159 | }, \ |
180901e6 | 160 | .nowrite = _nowrite, \ |
1c324e59 MD |
161 | }, |
162 | ||
4774c8f3 MD |
163 | #undef _ctf_sequence_encoded |
164 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
180901e6 | 165 | _length_type, _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
166 | { \ |
167 | .name = #_item, \ | |
168 | .type = \ | |
169 | { \ | |
170 | .atype = atype_sequence, \ | |
46d52200 | 171 | .u = \ |
1c324e59 | 172 | { \ |
46d52200 ZT |
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 | }, \ | |
1c324e59 MD |
178 | }, \ |
179 | }, \ | |
180901e6 | 180 | .nowrite = _nowrite, \ |
1c324e59 MD |
181 | }, |
182 | ||
4774c8f3 | 183 | #undef _ctf_string |
180901e6 | 184 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
185 | { \ |
186 | .name = #_item, \ | |
187 | .type = \ | |
188 | { \ | |
189 | .atype = atype_string, \ | |
46d52200 ZT |
190 | .u = \ |
191 | { \ | |
192 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
193 | }, \ | |
1c324e59 | 194 | }, \ |
180901e6 | 195 | .nowrite = _nowrite, \ |
1c324e59 MD |
196 | }, |
197 | ||
198 | #undef TP_FIELDS | |
2eda209b | 199 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
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 | |
2eda209b | 219 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
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 | * | |
1c324e59 MD |
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> | |
4774c8f3 | 235 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 236 | |
4774c8f3 | 237 | #undef _ctf_integer_ext |
180901e6 | 238 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
239 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
240 | __event_len += sizeof(_type); | |
241 | ||
4774c8f3 | 242 | #undef _ctf_float |
180901e6 | 243 | #define _ctf_float(_type, _item, _src, _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_array_encoded |
180901e6 | 248 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
249 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
250 | __event_len += sizeof(_type) * (_length); | |
251 | ||
4774c8f3 MD |
252 | #undef _ctf_sequence_encoded |
253 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 254 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
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 | ||
4774c8f3 | 262 | #undef _ctf_string |
180901e6 | 263 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
264 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
265 | ||
266 | #undef TP_ARGS | |
2eda209b | 267 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
268 | |
269 | #undef TP_FIELDS | |
2eda209b | 270 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
271 | |
272 | #undef TRACEPOINT_EVENT_CLASS | |
a8909ba5 PW |
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)) \ | |
1c324e59 MD |
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 | ||
1ddfd641 MD |
290 | /* |
291 | * Stage 3.1 of tracepoint event generation. | |
292 | * | |
293 | * Create static inline function that layout the filter stack data. | |
4774c8f3 | 294 | * We make both write and nowrite data available to the filter. |
1ddfd641 MD |
295 | */ |
296 | ||
297 | /* Reset all macros within TRACEPOINT_EVENT */ | |
298 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
299 | #include <lttng/ust-tracepoint-event-write.h> |
300 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1ddfd641 | 301 | |
4774c8f3 | 302 | #undef _ctf_integer_ext |
180901e6 | 303 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
fa099471 MD |
304 | if (lttng_is_signed_type(_type)) { \ |
305 | int64_t __ctf_tmp_int64 = (int64_t) (_type) (_src); \ | |
306 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
307 | } else { \ | |
308 | uint64_t __ctf_tmp_uint64 = (uint64_t) (_type) (_src); \ | |
309 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
310 | } \ | |
1ddfd641 MD |
311 | __stack_data += sizeof(int64_t); |
312 | ||
4774c8f3 | 313 | #undef _ctf_float |
180901e6 | 314 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
fa099471 MD |
315 | { \ |
316 | double __ctf_tmp_double = (double) (_type) (_src); \ | |
317 | memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \ | |
318 | __stack_data += sizeof(double); \ | |
319 | } | |
1ddfd641 | 320 | |
4774c8f3 | 321 | #undef _ctf_array_encoded |
180901e6 | 322 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
fa099471 MD |
323 | { \ |
324 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
59034aab | 325 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
326 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
327 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 328 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
329 | __stack_data += sizeof(void **); \ |
330 | } | |
1ddfd641 | 331 | |
4774c8f3 MD |
332 | #undef _ctf_sequence_encoded |
333 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 334 | _src_length, _encoding, _nowrite) \ |
fa099471 MD |
335 | { \ |
336 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
59034aab | 337 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
338 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
339 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 340 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
341 | __stack_data += sizeof(void **); \ |
342 | } | |
1ddfd641 | 343 | |
4774c8f3 | 344 | #undef _ctf_string |
180901e6 | 345 | #define _ctf_string(_item, _src, _nowrite) \ |
fa099471 | 346 | { \ |
59034aab | 347 | const void *__ctf_tmp_ptr = (_src); \ |
c4261b0a | 348 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
27f4b609 | 349 | __stack_data += sizeof(void **); \ |
fa099471 | 350 | } |
1ddfd641 MD |
351 | |
352 | #undef TP_ARGS | |
353 | #define TP_ARGS(...) __VA_ARGS__ | |
354 | ||
355 | #undef TP_FIELDS | |
356 | #define TP_FIELDS(...) __VA_ARGS__ | |
357 | ||
358 | #undef TRACEPOINT_EVENT_CLASS | |
359 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
360 | static inline \ | |
361 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
362 | _TP_ARGS_DATA_PROTO(_args)) \ | |
363 | { \ | |
364 | _fields \ | |
365 | } | |
366 | ||
367 | #include TRACEPOINT_INCLUDE | |
368 | ||
369 | ||
370 | ||
1c324e59 | 371 | /* |
df854e41 | 372 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
373 | * |
374 | * Create static inline function that calculates event payload alignment. | |
375 | */ | |
376 | ||
377 | /* Reset all macros within TRACEPOINT_EVENT */ | |
378 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 379 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 380 | |
4774c8f3 | 381 | #undef _ctf_integer_ext |
180901e6 | 382 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
383 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
384 | ||
4774c8f3 | 385 | #undef _ctf_float |
180901e6 | 386 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
387 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
388 | ||
4774c8f3 | 389 | #undef _ctf_array_encoded |
180901e6 | 390 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
391 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
392 | ||
4774c8f3 MD |
393 | #undef _ctf_sequence_encoded |
394 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 395 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
396 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
397 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
398 | ||
4774c8f3 | 399 | #undef _ctf_string |
180901e6 | 400 | #define _ctf_string(_item, _src, _nowrite) |
1c324e59 MD |
401 | |
402 | #undef TP_ARGS | |
2eda209b | 403 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
404 | |
405 | #undef TP_FIELDS | |
2eda209b | 406 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
407 | |
408 | #undef TRACEPOINT_EVENT_CLASS | |
409 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
410 | static inline lttng_ust_notrace \ |
411 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \ | |
1c324e59 MD |
412 | static inline \ |
413 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
414 | { \ | |
415 | size_t __event_align = 1; \ | |
416 | _fields \ | |
417 | return __event_align; \ | |
418 | } | |
419 | ||
420 | #include TRACEPOINT_INCLUDE | |
421 | ||
422 | ||
423 | /* | |
df854e41 | 424 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
425 | * |
426 | * Create the probe function. This function calls event size calculation | |
427 | * and writes event data into the buffer. | |
428 | */ | |
429 | ||
430 | /* Reset all macros within TRACEPOINT_EVENT */ | |
431 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 432 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 433 | |
4774c8f3 | 434 | #undef _ctf_integer_ext |
180901e6 | 435 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
436 | { \ |
437 | _type __tmp = (_src); \ | |
438 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
439 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
440 | } | |
441 | ||
4774c8f3 | 442 | #undef _ctf_float |
180901e6 | 443 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
444 | { \ |
445 | _type __tmp = (_src); \ | |
446 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
447 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
448 | } | |
449 | ||
4774c8f3 | 450 | #undef _ctf_array_encoded |
180901e6 | 451 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
452 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
453 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
454 | ||
4774c8f3 MD |
455 | #undef _ctf_sequence_encoded |
456 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 457 | _src_length, _encoding, _nowrite) \ |
1c324e59 | 458 | { \ |
d71b57b9 | 459 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
460 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
461 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
462 | } \ | |
463 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
464 | __chan->ops->event_write(&__ctx, _src, \ | |
465 | sizeof(_type) * __get_dynamic_len(dest)); | |
466 | ||
4774c8f3 | 467 | #undef _ctf_string |
180901e6 | 468 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
469 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
470 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
471 | ||
472 | /* Beware: this get len actually consumes the len value */ | |
473 | #undef __get_dynamic_len | |
d71b57b9 | 474 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
475 | |
476 | #undef TP_ARGS | |
2eda209b | 477 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
478 | |
479 | #undef TP_FIELDS | |
2eda209b | 480 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 481 | |
95c25348 PW |
482 | /* |
483 | * For state dump, check that "session" argument (mandatory) matches the | |
484 | * session this event belongs to. Ensures that we write state dump data only | |
485 | * into the started session, not into all sessions. | |
486 | */ | |
487 | #undef _TP_SESSION_CHECK | |
488 | #ifdef TP_SESSION_CHECK | |
489 | #define _TP_SESSION_CHECK(session, csession) (session == csession) | |
490 | #else /* TP_SESSION_CHECK */ | |
491 | #define _TP_SESSION_CHECK(session, csession) 1 | |
492 | #endif /* TP_SESSION_CHECK */ | |
493 | ||
1ddfd641 MD |
494 | /* |
495 | * Using twice size for filter stack data to hold size and pointer for | |
496 | * each field (worse case). For integers, max size required is 64-bit. | |
497 | * Same for double-precision floats. Those fit within | |
498 | * 2*sizeof(unsigned long) for all supported architectures. | |
61ce3223 | 499 | * Perform UNION (||) of filter runtime list. |
1ddfd641 | 500 | */ |
1c324e59 MD |
501 | #undef TRACEPOINT_EVENT_CLASS |
502 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
503 | static lttng_ust_notrace \ |
504 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \ | |
505 | static \ | |
506 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 | 507 | { \ |
46d52200 | 508 | struct lttng_event *__event = (struct lttng_event *) __tp_data; \ |
7dd08bec | 509 | struct lttng_channel *__chan = __event->chan; \ |
f280cb51 | 510 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
511 | size_t __event_len, __event_align; \ |
512 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 513 | union { \ |
1ddfd641 MD |
514 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
515 | char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
d71b57b9 | 516 | } __stackvar; \ |
1c324e59 MD |
517 | int __ret; \ |
518 | \ | |
519 | if (0) \ | |
520 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
95c25348 PW |
521 | if (!_TP_SESSION_CHECK(session, __chan->session)) \ |
522 | return; \ | |
1c324e59 MD |
523 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
524 | return; \ | |
525 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
526 | return; \ | |
527 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
528 | return; \ | |
1b436e01 MD |
529 | if (caa_unlikely(!TP_RCU_LINK_TEST())) \ |
530 | return; \ | |
e58095ef | 531 | if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \ |
f488575f | 532 | struct lttng_bytecode_runtime *bc_runtime; \ |
dcdeaff0 | 533 | int __filter_record = __event->has_enablers_without_bytecode; \ |
f488575f | 534 | \ |
1ddfd641 | 535 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ |
f488575f | 536 | _TP_ARGS_DATA_VAR(_args)); \ |
000b8662 | 537 | tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
61ce3223 | 538 | if (caa_unlikely(bc_runtime->filter(bc_runtime, \ |
8a92ed2a MD |
539 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
540 | __filter_record = 1; \ | |
f488575f | 541 | } \ |
8a92ed2a | 542 | if (caa_likely(!__filter_record)) \ |
61ce3223 | 543 | return; \ |
1ddfd641 MD |
544 | } \ |
545 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
546 | _TP_ARGS_DATA_VAR(_args)); \ |
547 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
548 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
549 | __event_align, -1, __chan->handle); \ | |
96f85541 | 550 | __ctx.ip = __builtin_return_address(0); \ |
1c324e59 MD |
551 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
552 | if (__ret < 0) \ | |
553 | return; \ | |
554 | _fields \ | |
555 | __chan->ops->event_commit(&__ctx); \ | |
556 | } | |
557 | ||
558 | #include TRACEPOINT_INCLUDE | |
559 | ||
560 | #undef __get_dynamic_len | |
561 | ||
68755429 MD |
562 | /* |
563 | * Stage 5.1 of tracepoint event generation. | |
564 | * | |
565 | * Create probe signature | |
566 | */ | |
567 | ||
568 | /* Reset all macros within TRACEPOINT_EVENT */ | |
569 | #include <lttng/ust-tracepoint-event-reset.h> | |
570 | ||
571 | #undef TP_ARGS | |
2eda209b | 572 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
573 | |
574 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
575 | |
576 | #undef TRACEPOINT_EVENT_CLASS | |
577 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
578 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
9eb06182 | 579 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
580 | |
581 | #include TRACEPOINT_INCLUDE | |
582 | ||
9eb06182 MD |
583 | #undef _TP_EXTRACT_STRING2 |
584 | ||
05ceaafd | 585 | /* |
882a56d7 | 586 | * Stage 6 of tracepoint event generation. |
1c324e59 | 587 | * |
df854e41 MD |
588 | * Tracepoint loglevel mapping definition generation. We generate a |
589 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
590 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
591 | * the compiler will complain. | |
05ceaafd MD |
592 | */ |
593 | ||
594 | /* Reset all macros within TRACEPOINT_EVENT */ | |
595 | #include <lttng/ust-tracepoint-event-reset.h> | |
596 | ||
597 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
598 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
599 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
600 | static const int *_loglevel___##__provider##___##__name = \ | |
601 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
602 | |
603 | #include TRACEPOINT_INCLUDE | |
604 | ||
6ddc916d MD |
605 | /* |
606 | * Stage 6.1 of tracepoint event generation. | |
607 | * | |
608 | * Tracepoint UML URI info. | |
609 | */ | |
610 | ||
611 | /* Reset all macros within TRACEPOINT_EVENT */ | |
612 | #include <lttng/ust-tracepoint-event-reset.h> | |
613 | ||
614 | #undef TRACEPOINT_MODEL_EMF_URI | |
615 | #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \ | |
616 | static const char *_model_emf_uri___##__provider##___##__name = __uri; | |
617 | ||
618 | #include TRACEPOINT_INCLUDE | |
619 | ||
df854e41 | 620 | /* |
882a56d7 | 621 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
622 | * |
623 | * Create events description structures. We use a weakref because | |
624 | * loglevels are optional. If not declared, the event will point to the | |
625 | * a loglevel that contains NULL. | |
626 | */ | |
627 | ||
628 | /* Reset all macros within TRACEPOINT_EVENT */ | |
629 | #include <lttng/ust-tracepoint-event-reset.h> | |
630 | ||
631 | #undef TRACEPOINT_EVENT_INSTANCE | |
632 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
633 | static const int * \ |
634 | __ref_loglevel___##_provider##___##_name \ | |
635 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
6ddc916d MD |
636 | static const char * \ |
637 | __ref_model_emf_uri___##_provider##___##_name \ | |
638 | __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\ | |
df854e41 | 639 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
df854e41 | 640 | .name = #_provider ":" #_name, \ |
fbdeb5ec | 641 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
46d52200 ZT |
642 | .ctx = NULL, \ |
643 | .fields = __event_fields___##_provider##___##_template, \ | |
df854e41 | 644 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 645 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 646 | .signature = __tp_event_signature___##_provider##___##_template, \ |
46d52200 | 647 | .u = { .ext = { .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name } }, \ |
df854e41 MD |
648 | }; |
649 | ||
650 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 651 | |
df854e41 | 652 | /* |
882a56d7 | 653 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
654 | * |
655 | * Create array of events. | |
656 | */ | |
657 | ||
658 | /* Reset all macros within TRACEPOINT_EVENT */ | |
659 | #include <lttng/ust-tracepoint-event-reset.h> | |
660 | ||
661 | #undef TRACEPOINT_EVENT_INSTANCE | |
662 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
663 | &__event_desc___##_provider##_##_name, | |
664 | ||
665 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
666 | #include TRACEPOINT_INCLUDE |
667 | }; | |
668 | ||
df854e41 | 669 | |
05ceaafd | 670 | /* |
882a56d7 | 671 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
672 | * |
673 | * Create a toplevel descriptor for the whole probe. | |
674 | */ | |
675 | ||
676 | /* non-const because list head will be modified when registered. */ | |
677 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 678 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
679 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
680 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
46d52200 ZT |
681 | .head = { NULL, NULL }, |
682 | .lazy_init_head = { NULL, NULL }, | |
683 | .lazy = 0, | |
71d31690 MD |
684 | .major = LTTNG_UST_PROVIDER_MAJOR, |
685 | .minor = LTTNG_UST_PROVIDER_MINOR, | |
05ceaafd MD |
686 | }; |
687 | ||
f0cc794d MD |
688 | static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER); |
689 | ||
05ceaafd | 690 | /* |
882a56d7 | 691 | * Stage 9 of tracepoint event generation. |
05ceaafd | 692 | * |
1c324e59 | 693 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
694 | * |
695 | * Generate the constructor as an externally visible symbol for use when | |
696 | * linking the probe statically. | |
f0cc794d MD |
697 | * |
698 | * Register refcount is protected by libc dynamic loader mutex. | |
1c324e59 MD |
699 | */ |
700 | ||
701 | /* Reset all macros within TRACEPOINT_EVENT */ | |
702 | #include <lttng/ust-tracepoint-event-reset.h> | |
a8909ba5 PW |
703 | static void lttng_ust_notrace __attribute__((constructor)) |
704 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void); | |
705 | static void | |
1c324e59 MD |
706 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
707 | { | |
708 | int ret; | |
709 | ||
f0cc794d MD |
710 | if (_TP_COMBINE_TOKENS(__probe_register_refcount___, |
711 | TRACEPOINT_PROVIDER)++) { | |
712 | return; | |
713 | } | |
e8bd1da7 MD |
714 | /* |
715 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
716 | * static inline function that ensures every probe PROVIDER | |
717 | * argument match the provider within which they appear. It | |
718 | * calls empty static inline functions, and therefore has no | |
719 | * runtime effect. However, if it detects an error, a linker | |
720 | * error will appear. | |
721 | */ | |
722 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
7dd08bec | 723 | ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
7d381d6e MD |
724 | if (ret) { |
725 | fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret); | |
726 | abort(); | |
727 | } | |
1c324e59 MD |
728 | } |
729 | ||
a8909ba5 PW |
730 | static void lttng_ust_notrace __attribute__((destructor)) |
731 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void); | |
732 | static void | |
1c324e59 MD |
733 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
734 | { | |
f0cc794d MD |
735 | if (--_TP_COMBINE_TOKENS(__probe_register_refcount___, |
736 | TRACEPOINT_PROVIDER)) { | |
737 | return; | |
738 | } | |
7dd08bec | 739 | lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 | 740 | } |
628e1d81 MD |
741 | |
742 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |