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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> | |
7bf3e916 | 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, \ | |
151 | .u.array = \ | |
152 | { \ | |
153 | .length = _length, \ | |
154 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
155 | }, \ | |
156 | }, \ | |
180901e6 | 157 | .nowrite = _nowrite, \ |
1c324e59 MD |
158 | }, |
159 | ||
4774c8f3 MD |
160 | #undef _ctf_sequence_encoded |
161 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
180901e6 | 162 | _length_type, _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
163 | { \ |
164 | .name = #_item, \ | |
165 | .type = \ | |
166 | { \ | |
167 | .atype = atype_sequence, \ | |
168 | .u.sequence = \ | |
169 | { \ | |
170 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
171 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
172 | }, \ | |
173 | }, \ | |
180901e6 | 174 | .nowrite = _nowrite, \ |
1c324e59 MD |
175 | }, |
176 | ||
4774c8f3 | 177 | #undef _ctf_string |
180901e6 | 178 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
179 | { \ |
180 | .name = #_item, \ | |
181 | .type = \ | |
182 | { \ | |
183 | .atype = atype_string, \ | |
184 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
185 | }, \ | |
180901e6 | 186 | .nowrite = _nowrite, \ |
1c324e59 MD |
187 | }, |
188 | ||
189 | #undef TP_FIELDS | |
2eda209b | 190 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
191 | |
192 | #undef TRACEPOINT_EVENT_CLASS | |
193 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
194 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
195 | _fields \ | |
196 | }; | |
197 | ||
198 | #include TRACEPOINT_INCLUDE | |
199 | ||
200 | /* | |
201 | * Stage 2 of tracepoint event generation. | |
202 | * | |
203 | * Create probe callback prototypes. | |
204 | */ | |
205 | ||
206 | /* Reset all macros within TRACEPOINT_EVENT */ | |
207 | #include <lttng/ust-tracepoint-event-reset.h> | |
208 | ||
209 | #undef TP_ARGS | |
2eda209b | 210 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
211 | |
212 | #undef TRACEPOINT_EVENT_CLASS | |
213 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
214 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
215 | ||
216 | #include TRACEPOINT_INCLUDE | |
217 | ||
218 | /* | |
219 | * Stage 3 of tracepoint event generation. | |
220 | * | |
1c324e59 MD |
221 | * Create static inline function that calculates event size. |
222 | */ | |
223 | ||
224 | /* Reset all macros within TRACEPOINT_EVENT */ | |
225 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 226 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 227 | |
4774c8f3 | 228 | #undef _ctf_integer_ext |
180901e6 | 229 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
230 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
231 | __event_len += sizeof(_type); | |
232 | ||
4774c8f3 | 233 | #undef _ctf_float |
180901e6 | 234 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
235 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
236 | __event_len += sizeof(_type); | |
237 | ||
4774c8f3 | 238 | #undef _ctf_array_encoded |
180901e6 | 239 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
240 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
241 | __event_len += sizeof(_type) * (_length); | |
242 | ||
4774c8f3 MD |
243 | #undef _ctf_sequence_encoded |
244 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 245 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
246 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
247 | __event_len += sizeof(_length_type); \ | |
248 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
249 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
250 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
251 | __dynamic_len_idx++; | |
252 | ||
4774c8f3 | 253 | #undef _ctf_string |
180901e6 | 254 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
255 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
256 | ||
257 | #undef TP_ARGS | |
2eda209b | 258 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
259 | |
260 | #undef TP_FIELDS | |
2eda209b | 261 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
262 | |
263 | #undef TRACEPOINT_EVENT_CLASS | |
a8909ba5 PW |
264 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ |
265 | static inline lttng_ust_notrace \ | |
266 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \ | |
267 | static inline \ | |
268 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 MD |
269 | { \ |
270 | size_t __event_len = 0; \ | |
271 | unsigned int __dynamic_len_idx = 0; \ | |
272 | \ | |
273 | if (0) \ | |
274 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
275 | _fields \ | |
276 | return __event_len; \ | |
277 | } | |
278 | ||
279 | #include TRACEPOINT_INCLUDE | |
280 | ||
1ddfd641 MD |
281 | /* |
282 | * Stage 3.1 of tracepoint event generation. | |
283 | * | |
284 | * Create static inline function that layout the filter stack data. | |
4774c8f3 | 285 | * We make both write and nowrite data available to the filter. |
1ddfd641 MD |
286 | */ |
287 | ||
288 | /* Reset all macros within TRACEPOINT_EVENT */ | |
289 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
290 | #include <lttng/ust-tracepoint-event-write.h> |
291 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1ddfd641 | 292 | |
4774c8f3 | 293 | #undef _ctf_integer_ext |
180901e6 | 294 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
fa099471 MD |
295 | if (lttng_is_signed_type(_type)) { \ |
296 | int64_t __ctf_tmp_int64 = (int64_t) (_type) (_src); \ | |
297 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
298 | } else { \ | |
299 | uint64_t __ctf_tmp_uint64 = (uint64_t) (_type) (_src); \ | |
300 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
301 | } \ | |
1ddfd641 MD |
302 | __stack_data += sizeof(int64_t); |
303 | ||
4774c8f3 | 304 | #undef _ctf_float |
180901e6 | 305 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
fa099471 MD |
306 | { \ |
307 | double __ctf_tmp_double = (double) (_type) (_src); \ | |
308 | memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \ | |
309 | __stack_data += sizeof(double); \ | |
310 | } | |
1ddfd641 | 311 | |
4774c8f3 | 312 | #undef _ctf_array_encoded |
180901e6 | 313 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
fa099471 MD |
314 | { \ |
315 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
59034aab | 316 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
317 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
318 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 319 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
320 | __stack_data += sizeof(void **); \ |
321 | } | |
1ddfd641 | 322 | |
4774c8f3 MD |
323 | #undef _ctf_sequence_encoded |
324 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 325 | _src_length, _encoding, _nowrite) \ |
fa099471 MD |
326 | { \ |
327 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
59034aab | 328 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
329 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
330 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 331 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
332 | __stack_data += sizeof(void **); \ |
333 | } | |
1ddfd641 | 334 | |
4774c8f3 | 335 | #undef _ctf_string |
180901e6 | 336 | #define _ctf_string(_item, _src, _nowrite) \ |
fa099471 | 337 | { \ |
59034aab | 338 | const void *__ctf_tmp_ptr = (_src); \ |
c4261b0a | 339 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
27f4b609 | 340 | __stack_data += sizeof(void **); \ |
fa099471 | 341 | } |
1ddfd641 MD |
342 | |
343 | #undef TP_ARGS | |
344 | #define TP_ARGS(...) __VA_ARGS__ | |
345 | ||
346 | #undef TP_FIELDS | |
347 | #define TP_FIELDS(...) __VA_ARGS__ | |
348 | ||
349 | #undef TRACEPOINT_EVENT_CLASS | |
350 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
351 | static inline \ | |
352 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
353 | _TP_ARGS_DATA_PROTO(_args)) \ | |
354 | { \ | |
355 | _fields \ | |
356 | } | |
357 | ||
358 | #include TRACEPOINT_INCLUDE | |
359 | ||
360 | ||
361 | ||
1c324e59 | 362 | /* |
df854e41 | 363 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
364 | * |
365 | * Create static inline function that calculates event payload alignment. | |
366 | */ | |
367 | ||
368 | /* Reset all macros within TRACEPOINT_EVENT */ | |
369 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 370 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 371 | |
4774c8f3 | 372 | #undef _ctf_integer_ext |
180901e6 | 373 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
374 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
375 | ||
4774c8f3 | 376 | #undef _ctf_float |
180901e6 | 377 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
378 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
379 | ||
4774c8f3 | 380 | #undef _ctf_array_encoded |
180901e6 | 381 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
382 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
383 | ||
4774c8f3 MD |
384 | #undef _ctf_sequence_encoded |
385 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 386 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
387 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
388 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
389 | ||
4774c8f3 | 390 | #undef _ctf_string |
180901e6 | 391 | #define _ctf_string(_item, _src, _nowrite) |
1c324e59 MD |
392 | |
393 | #undef TP_ARGS | |
2eda209b | 394 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
395 | |
396 | #undef TP_FIELDS | |
2eda209b | 397 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
398 | |
399 | #undef TRACEPOINT_EVENT_CLASS | |
400 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
401 | static inline lttng_ust_notrace \ |
402 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \ | |
1c324e59 MD |
403 | static inline \ |
404 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
405 | { \ | |
406 | size_t __event_align = 1; \ | |
407 | _fields \ | |
408 | return __event_align; \ | |
409 | } | |
410 | ||
411 | #include TRACEPOINT_INCLUDE | |
412 | ||
413 | ||
414 | /* | |
df854e41 | 415 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
416 | * |
417 | * Create the probe function. This function calls event size calculation | |
418 | * and writes event data into the buffer. | |
419 | */ | |
420 | ||
421 | /* Reset all macros within TRACEPOINT_EVENT */ | |
422 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 423 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 424 | |
4774c8f3 | 425 | #undef _ctf_integer_ext |
180901e6 | 426 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
427 | { \ |
428 | _type __tmp = (_src); \ | |
429 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
430 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
431 | } | |
432 | ||
4774c8f3 | 433 | #undef _ctf_float |
180901e6 | 434 | #define _ctf_float(_type, _item, _src, _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_array_encoded |
180901e6 | 442 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
443 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
444 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
445 | ||
4774c8f3 MD |
446 | #undef _ctf_sequence_encoded |
447 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 448 | _src_length, _encoding, _nowrite) \ |
1c324e59 | 449 | { \ |
d71b57b9 | 450 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
451 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
452 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
453 | } \ | |
454 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
455 | __chan->ops->event_write(&__ctx, _src, \ | |
456 | sizeof(_type) * __get_dynamic_len(dest)); | |
457 | ||
4774c8f3 | 458 | #undef _ctf_string |
180901e6 | 459 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
460 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
461 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
462 | ||
463 | /* Beware: this get len actually consumes the len value */ | |
464 | #undef __get_dynamic_len | |
d71b57b9 | 465 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
466 | |
467 | #undef TP_ARGS | |
2eda209b | 468 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
469 | |
470 | #undef TP_FIELDS | |
2eda209b | 471 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 472 | |
1ddfd641 MD |
473 | /* |
474 | * Using twice size for filter stack data to hold size and pointer for | |
475 | * each field (worse case). For integers, max size required is 64-bit. | |
476 | * Same for double-precision floats. Those fit within | |
477 | * 2*sizeof(unsigned long) for all supported architectures. | |
61ce3223 | 478 | * Perform UNION (||) of filter runtime list. |
1ddfd641 | 479 | */ |
1c324e59 MD |
480 | #undef TRACEPOINT_EVENT_CLASS |
481 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
482 | static lttng_ust_notrace \ |
483 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \ | |
484 | static \ | |
485 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 | 486 | { \ |
7dd08bec MD |
487 | struct lttng_event *__event = __tp_data; \ |
488 | struct lttng_channel *__chan = __event->chan; \ | |
f280cb51 | 489 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
490 | size_t __event_len, __event_align; \ |
491 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 492 | union { \ |
1ddfd641 MD |
493 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
494 | char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
d71b57b9 | 495 | } __stackvar; \ |
1c324e59 MD |
496 | int __ret; \ |
497 | \ | |
498 | if (0) \ | |
499 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
500 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
501 | return; \ | |
502 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
503 | return; \ | |
504 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
505 | return; \ | |
1b436e01 MD |
506 | if (caa_unlikely(!TP_RCU_LINK_TEST())) \ |
507 | return; \ | |
e58095ef | 508 | if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \ |
f488575f | 509 | struct lttng_bytecode_runtime *bc_runtime; \ |
dcdeaff0 | 510 | int __filter_record = __event->has_enablers_without_bytecode; \ |
f488575f | 511 | \ |
1ddfd641 | 512 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ |
f488575f | 513 | _TP_ARGS_DATA_VAR(_args)); \ |
000b8662 | 514 | tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
61ce3223 | 515 | if (caa_unlikely(bc_runtime->filter(bc_runtime, \ |
8a92ed2a MD |
516 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
517 | __filter_record = 1; \ | |
f488575f | 518 | } \ |
8a92ed2a | 519 | if (caa_likely(!__filter_record)) \ |
61ce3223 | 520 | return; \ |
1ddfd641 MD |
521 | } \ |
522 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
523 | _TP_ARGS_DATA_VAR(_args)); \ |
524 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
525 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
526 | __event_align, -1, __chan->handle); \ | |
527 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
528 | if (__ret < 0) \ | |
529 | return; \ | |
530 | _fields \ | |
531 | __chan->ops->event_commit(&__ctx); \ | |
532 | } | |
533 | ||
534 | #include TRACEPOINT_INCLUDE | |
535 | ||
536 | #undef __get_dynamic_len | |
537 | ||
68755429 MD |
538 | /* |
539 | * Stage 5.1 of tracepoint event generation. | |
540 | * | |
541 | * Create probe signature | |
542 | */ | |
543 | ||
544 | /* Reset all macros within TRACEPOINT_EVENT */ | |
545 | #include <lttng/ust-tracepoint-event-reset.h> | |
546 | ||
547 | #undef TP_ARGS | |
2eda209b | 548 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
549 | |
550 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
551 | |
552 | #undef TRACEPOINT_EVENT_CLASS | |
553 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
554 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
9eb06182 | 555 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
556 | |
557 | #include TRACEPOINT_INCLUDE | |
558 | ||
9eb06182 MD |
559 | #undef _TP_EXTRACT_STRING2 |
560 | ||
05ceaafd | 561 | /* |
882a56d7 | 562 | * Stage 6 of tracepoint event generation. |
1c324e59 | 563 | * |
df854e41 MD |
564 | * Tracepoint loglevel mapping definition generation. We generate a |
565 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
566 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
567 | * the compiler will complain. | |
05ceaafd MD |
568 | */ |
569 | ||
570 | /* Reset all macros within TRACEPOINT_EVENT */ | |
571 | #include <lttng/ust-tracepoint-event-reset.h> | |
572 | ||
573 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
574 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
575 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
576 | static const int *_loglevel___##__provider##___##__name = \ | |
577 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
578 | |
579 | #include TRACEPOINT_INCLUDE | |
580 | ||
6ddc916d MD |
581 | /* |
582 | * Stage 6.1 of tracepoint event generation. | |
583 | * | |
584 | * Tracepoint UML URI info. | |
585 | */ | |
586 | ||
587 | /* Reset all macros within TRACEPOINT_EVENT */ | |
588 | #include <lttng/ust-tracepoint-event-reset.h> | |
589 | ||
590 | #undef TRACEPOINT_MODEL_EMF_URI | |
591 | #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \ | |
592 | static const char *_model_emf_uri___##__provider##___##__name = __uri; | |
593 | ||
594 | #include TRACEPOINT_INCLUDE | |
595 | ||
df854e41 | 596 | /* |
882a56d7 | 597 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
598 | * |
599 | * Create events description structures. We use a weakref because | |
600 | * loglevels are optional. If not declared, the event will point to the | |
601 | * a loglevel that contains NULL. | |
602 | */ | |
603 | ||
604 | /* Reset all macros within TRACEPOINT_EVENT */ | |
605 | #include <lttng/ust-tracepoint-event-reset.h> | |
606 | ||
607 | #undef TRACEPOINT_EVENT_INSTANCE | |
608 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
609 | static const int * \ |
610 | __ref_loglevel___##_provider##___##_name \ | |
611 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
6ddc916d MD |
612 | static const char * \ |
613 | __ref_model_emf_uri___##_provider##___##_name \ | |
614 | __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\ | |
df854e41 MD |
615 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
616 | .fields = __event_fields___##_provider##___##_template, \ | |
617 | .name = #_provider ":" #_name, \ | |
fbdeb5ec | 618 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
df854e41 | 619 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 620 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 621 | .signature = __tp_event_signature___##_provider##___##_template, \ |
6ddc916d | 622 | .u.ext.model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \ |
df854e41 MD |
623 | }; |
624 | ||
625 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 626 | |
df854e41 | 627 | /* |
882a56d7 | 628 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
629 | * |
630 | * Create array of events. | |
631 | */ | |
632 | ||
633 | /* Reset all macros within TRACEPOINT_EVENT */ | |
634 | #include <lttng/ust-tracepoint-event-reset.h> | |
635 | ||
636 | #undef TRACEPOINT_EVENT_INSTANCE | |
637 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
638 | &__event_desc___##_provider##_##_name, | |
639 | ||
640 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
641 | #include TRACEPOINT_INCLUDE |
642 | }; | |
643 | ||
df854e41 | 644 | |
05ceaafd | 645 | /* |
882a56d7 | 646 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
647 | * |
648 | * Create a toplevel descriptor for the whole probe. | |
649 | */ | |
650 | ||
651 | /* non-const because list head will be modified when registered. */ | |
652 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 653 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
654 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
655 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
71d31690 MD |
656 | .major = LTTNG_UST_PROVIDER_MAJOR, |
657 | .minor = LTTNG_UST_PROVIDER_MINOR, | |
05ceaafd MD |
658 | }; |
659 | ||
660 | /* | |
882a56d7 | 661 | * Stage 9 of tracepoint event generation. |
05ceaafd | 662 | * |
1c324e59 | 663 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
664 | * |
665 | * Generate the constructor as an externally visible symbol for use when | |
666 | * linking the probe statically. | |
1c324e59 MD |
667 | */ |
668 | ||
669 | /* Reset all macros within TRACEPOINT_EVENT */ | |
670 | #include <lttng/ust-tracepoint-event-reset.h> | |
a8909ba5 PW |
671 | static void lttng_ust_notrace __attribute__((constructor)) |
672 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void); | |
673 | static void | |
1c324e59 MD |
674 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
675 | { | |
676 | int ret; | |
677 | ||
e8bd1da7 MD |
678 | /* |
679 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
680 | * static inline function that ensures every probe PROVIDER | |
681 | * argument match the provider within which they appear. It | |
682 | * calls empty static inline functions, and therefore has no | |
683 | * runtime effect. However, if it detects an error, a linker | |
684 | * error will appear. | |
685 | */ | |
686 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
7dd08bec | 687 | ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
7bf3e916 MD |
688 | if (ret) { |
689 | fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret); | |
690 | abort(); | |
691 | } | |
1c324e59 MD |
692 | } |
693 | ||
a8909ba5 PW |
694 | static void lttng_ust_notrace __attribute__((destructor)) |
695 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void); | |
696 | static void | |
1c324e59 MD |
697 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
698 | { | |
7dd08bec | 699 | lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 | 700 | } |
628e1d81 MD |
701 | |
702 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |