Commit | Line | Data |
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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. | |
1c324e59 MD |
13 | */ |
14 | ||
15 | #include <stdio.h> | |
16 | #include <urcu/compiler.h> | |
f488575f | 17 | #include <urcu/rculist.h> |
1c324e59 | 18 | #include <lttng/ust-events.h> |
1c324e59 | 19 | #include <lttng/ringbuffer-config.h> |
a8909ba5 | 20 | #include <lttng/ust-compiler.h> |
44c72f10 | 21 | #include <string.h> |
1c324e59 | 22 | |
1c324e59 MD |
23 | /* |
24 | * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the | |
25 | * same arguments and having the same field layout. | |
26 | * | |
27 | * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with | |
28 | * its own provider and name. It refers to a class (template). | |
29 | * | |
30 | * TRACEPOINT_EVENT declared both a class and an instance and does a | |
31 | * direct mapping from the instance to the class. | |
32 | */ | |
33 | ||
34 | #undef TRACEPOINT_EVENT | |
35 | #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ | |
36 | TRACEPOINT_EVENT_CLASS(_provider, _name, \ | |
37 | _TP_PARAMS(_args), \ | |
38 | _TP_PARAMS(_fields)) \ | |
39 | TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ | |
68755429 | 40 | _TP_PARAMS(_args)) |
1c324e59 MD |
41 | |
42 | /* Helpers */ | |
43 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
44 | ||
45 | #define _tp_max_t(type, x, y) \ | |
46 | ({ \ | |
47 | type __max1 = (x); \ | |
48 | type __max2 = (y); \ | |
49 | __max1 > __max2 ? __max1: __max2; \ | |
50 | }) | |
51 | ||
52 | /* | |
53 | * Stage 0 of tracepoint event generation. | |
54 | * | |
55 | * Check that each TRACEPOINT_EVENT provider argument match the | |
56 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
57 | */ | |
58 | ||
59 | /* Reset all macros within TRACEPOINT_EVENT */ | |
60 | #include <lttng/ust-tracepoint-event-reset.h> | |
61 | ||
62 | static inline | |
63 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
64 | { | |
65 | } | |
66 | ||
67 | #undef TRACEPOINT_EVENT_CLASS | |
68 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
69 | __tracepoint_provider_mismatch_##_provider(); | |
70 | ||
71 | #undef TRACEPOINT_EVENT_INSTANCE | |
72 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
73 | __tracepoint_provider_mismatch_##_provider(); | |
74 | ||
e8bd1da7 | 75 | static inline |
1c324e59 MD |
76 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) |
77 | { | |
78 | #include TRACEPOINT_INCLUDE | |
79 | } | |
80 | ||
f56cd1d5 MD |
81 | /* |
82 | * Stage 0.1 of tracepoint event generation. | |
83 | * | |
84 | * Check that each TRACEPOINT_EVENT provider:name does not exceed the | |
85 | * tracepoint name length limit. | |
86 | */ | |
87 | ||
88 | /* Reset all macros within TRACEPOINT_EVENT */ | |
89 | #include <lttng/ust-tracepoint-event-reset.h> | |
90 | ||
91 | #undef TRACEPOINT_EVENT_INSTANCE | |
92 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
93 | static const char \ | |
94 | __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \ | |
95 | __attribute__((unused)) = \ | |
96 | #_provider ":" #_name; | |
97 | ||
98 | #include TRACEPOINT_INCLUDE | |
99 | ||
1c324e59 MD |
100 | /* |
101 | * Stage 1 of tracepoint event generation. | |
102 | * | |
103 | * Create event field type metadata section. | |
104 | * Each event produce an array of fields. | |
105 | */ | |
106 | ||
107 | /* Reset all macros within TRACEPOINT_EVENT */ | |
108 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
109 | #include <lttng/ust-tracepoint-event-write.h> |
110 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1c324e59 | 111 | |
4774c8f3 | 112 | #undef _ctf_integer_ext |
180901e6 | 113 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
114 | { \ |
115 | .name = #_item, \ | |
116 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
180901e6 | 117 | .nowrite = _nowrite, \ |
1c324e59 MD |
118 | }, |
119 | ||
4774c8f3 | 120 | #undef _ctf_float |
180901e6 | 121 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
122 | { \ |
123 | .name = #_item, \ | |
124 | .type = __type_float(_type), \ | |
180901e6 | 125 | .nowrite = _nowrite, \ |
1c324e59 MD |
126 | }, |
127 | ||
4774c8f3 | 128 | #undef _ctf_array_encoded |
180901e6 | 129 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
130 | { \ |
131 | .name = #_item, \ | |
132 | .type = \ | |
133 | { \ | |
134 | .atype = atype_array, \ | |
135 | .u.array = \ | |
136 | { \ | |
137 | .length = _length, \ | |
138 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
139 | }, \ | |
140 | }, \ | |
180901e6 | 141 | .nowrite = _nowrite, \ |
1c324e59 MD |
142 | }, |
143 | ||
4774c8f3 MD |
144 | #undef _ctf_sequence_encoded |
145 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
180901e6 | 146 | _length_type, _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
147 | { \ |
148 | .name = #_item, \ | |
149 | .type = \ | |
150 | { \ | |
151 | .atype = atype_sequence, \ | |
152 | .u.sequence = \ | |
153 | { \ | |
154 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
155 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
156 | }, \ | |
157 | }, \ | |
180901e6 | 158 | .nowrite = _nowrite, \ |
1c324e59 MD |
159 | }, |
160 | ||
4774c8f3 | 161 | #undef _ctf_string |
180901e6 | 162 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
163 | { \ |
164 | .name = #_item, \ | |
165 | .type = \ | |
166 | { \ | |
167 | .atype = atype_string, \ | |
168 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
169 | }, \ | |
180901e6 | 170 | .nowrite = _nowrite, \ |
1c324e59 MD |
171 | }, |
172 | ||
173 | #undef TP_FIELDS | |
2eda209b | 174 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
175 | |
176 | #undef TRACEPOINT_EVENT_CLASS | |
177 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
178 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
179 | _fields \ | |
180 | }; | |
181 | ||
182 | #include TRACEPOINT_INCLUDE | |
183 | ||
184 | /* | |
185 | * Stage 2 of tracepoint event generation. | |
186 | * | |
187 | * Create probe callback prototypes. | |
188 | */ | |
189 | ||
190 | /* Reset all macros within TRACEPOINT_EVENT */ | |
191 | #include <lttng/ust-tracepoint-event-reset.h> | |
192 | ||
193 | #undef TP_ARGS | |
2eda209b | 194 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
195 | |
196 | #undef TRACEPOINT_EVENT_CLASS | |
197 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
198 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
199 | ||
200 | #include TRACEPOINT_INCLUDE | |
201 | ||
202 | /* | |
203 | * Stage 3 of tracepoint event generation. | |
204 | * | |
1c324e59 MD |
205 | * Create static inline function that calculates event size. |
206 | */ | |
207 | ||
208 | /* Reset all macros within TRACEPOINT_EVENT */ | |
209 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 210 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 211 | |
4774c8f3 | 212 | #undef _ctf_integer_ext |
180901e6 | 213 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
214 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
215 | __event_len += sizeof(_type); | |
216 | ||
4774c8f3 | 217 | #undef _ctf_float |
180901e6 | 218 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
219 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
220 | __event_len += sizeof(_type); | |
221 | ||
4774c8f3 | 222 | #undef _ctf_array_encoded |
180901e6 | 223 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
224 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
225 | __event_len += sizeof(_type) * (_length); | |
226 | ||
4774c8f3 MD |
227 | #undef _ctf_sequence_encoded |
228 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 229 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
230 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
231 | __event_len += sizeof(_length_type); \ | |
232 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
233 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
234 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
235 | __dynamic_len_idx++; | |
236 | ||
4774c8f3 | 237 | #undef _ctf_string |
180901e6 | 238 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
239 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
240 | ||
241 | #undef TP_ARGS | |
2eda209b | 242 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
243 | |
244 | #undef TP_FIELDS | |
2eda209b | 245 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
246 | |
247 | #undef TRACEPOINT_EVENT_CLASS | |
a8909ba5 PW |
248 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ |
249 | static inline lttng_ust_notrace \ | |
250 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \ | |
251 | static inline \ | |
252 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 MD |
253 | { \ |
254 | size_t __event_len = 0; \ | |
255 | unsigned int __dynamic_len_idx = 0; \ | |
256 | \ | |
257 | if (0) \ | |
258 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
259 | _fields \ | |
260 | return __event_len; \ | |
261 | } | |
262 | ||
263 | #include TRACEPOINT_INCLUDE | |
264 | ||
1ddfd641 MD |
265 | /* |
266 | * Stage 3.1 of tracepoint event generation. | |
267 | * | |
268 | * Create static inline function that layout the filter stack data. | |
4774c8f3 | 269 | * We make both write and nowrite data available to the filter. |
1ddfd641 MD |
270 | */ |
271 | ||
272 | /* Reset all macros within TRACEPOINT_EVENT */ | |
273 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
274 | #include <lttng/ust-tracepoint-event-write.h> |
275 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1ddfd641 | 276 | |
4774c8f3 | 277 | #undef _ctf_integer_ext |
180901e6 | 278 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
fa099471 MD |
279 | if (lttng_is_signed_type(_type)) { \ |
280 | int64_t __ctf_tmp_int64 = (int64_t) (_type) (_src); \ | |
281 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
282 | } else { \ | |
283 | uint64_t __ctf_tmp_uint64 = (uint64_t) (_type) (_src); \ | |
284 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
285 | } \ | |
1ddfd641 MD |
286 | __stack_data += sizeof(int64_t); |
287 | ||
4774c8f3 | 288 | #undef _ctf_float |
180901e6 | 289 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
fa099471 MD |
290 | { \ |
291 | double __ctf_tmp_double = (double) (_type) (_src); \ | |
292 | memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \ | |
293 | __stack_data += sizeof(double); \ | |
294 | } | |
1ddfd641 | 295 | |
4774c8f3 | 296 | #undef _ctf_array_encoded |
180901e6 | 297 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
fa099471 MD |
298 | { \ |
299 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
59034aab | 300 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
301 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
302 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 303 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
304 | __stack_data += sizeof(void **); \ |
305 | } | |
1ddfd641 | 306 | |
4774c8f3 MD |
307 | #undef _ctf_sequence_encoded |
308 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 309 | _src_length, _encoding, _nowrite) \ |
fa099471 MD |
310 | { \ |
311 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
59034aab | 312 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
313 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
314 | __stack_data += sizeof(unsigned long); \ | |
c4261b0a | 315 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
fa099471 MD |
316 | __stack_data += sizeof(void **); \ |
317 | } | |
1ddfd641 | 318 | |
4774c8f3 | 319 | #undef _ctf_string |
180901e6 | 320 | #define _ctf_string(_item, _src, _nowrite) \ |
fa099471 | 321 | { \ |
59034aab | 322 | const void *__ctf_tmp_ptr = (_src); \ |
c4261b0a | 323 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void **)); \ |
27f4b609 | 324 | __stack_data += sizeof(void **); \ |
fa099471 | 325 | } |
1ddfd641 MD |
326 | |
327 | #undef TP_ARGS | |
328 | #define TP_ARGS(...) __VA_ARGS__ | |
329 | ||
330 | #undef TP_FIELDS | |
331 | #define TP_FIELDS(...) __VA_ARGS__ | |
332 | ||
333 | #undef TRACEPOINT_EVENT_CLASS | |
334 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
335 | static inline \ | |
336 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
337 | _TP_ARGS_DATA_PROTO(_args)) \ | |
338 | { \ | |
339 | _fields \ | |
340 | } | |
341 | ||
342 | #include TRACEPOINT_INCLUDE | |
343 | ||
344 | ||
345 | ||
1c324e59 | 346 | /* |
df854e41 | 347 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
348 | * |
349 | * Create static inline function that calculates event payload alignment. | |
350 | */ | |
351 | ||
352 | /* Reset all macros within TRACEPOINT_EVENT */ | |
353 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 354 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 355 | |
4774c8f3 | 356 | #undef _ctf_integer_ext |
180901e6 | 357 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
358 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
359 | ||
4774c8f3 | 360 | #undef _ctf_float |
180901e6 | 361 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
362 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
363 | ||
4774c8f3 | 364 | #undef _ctf_array_encoded |
180901e6 | 365 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
366 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
367 | ||
4774c8f3 MD |
368 | #undef _ctf_sequence_encoded |
369 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 370 | _src_length, _encoding, _nowrite) \ |
1c324e59 MD |
371 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
372 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
373 | ||
4774c8f3 | 374 | #undef _ctf_string |
180901e6 | 375 | #define _ctf_string(_item, _src, _nowrite) |
1c324e59 MD |
376 | |
377 | #undef TP_ARGS | |
2eda209b | 378 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
379 | |
380 | #undef TP_FIELDS | |
2eda209b | 381 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
382 | |
383 | #undef TRACEPOINT_EVENT_CLASS | |
384 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
385 | static inline lttng_ust_notrace \ |
386 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \ | |
1c324e59 MD |
387 | static inline \ |
388 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
389 | { \ | |
390 | size_t __event_align = 1; \ | |
391 | _fields \ | |
392 | return __event_align; \ | |
393 | } | |
394 | ||
395 | #include TRACEPOINT_INCLUDE | |
396 | ||
397 | ||
398 | /* | |
df854e41 | 399 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
400 | * |
401 | * Create the probe function. This function calls event size calculation | |
402 | * and writes event data into the buffer. | |
403 | */ | |
404 | ||
405 | /* Reset all macros within TRACEPOINT_EVENT */ | |
406 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 407 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 408 | |
4774c8f3 | 409 | #undef _ctf_integer_ext |
180901e6 | 410 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
411 | { \ |
412 | _type __tmp = (_src); \ | |
413 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
414 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
415 | } | |
416 | ||
4774c8f3 | 417 | #undef _ctf_float |
180901e6 | 418 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
419 | { \ |
420 | _type __tmp = (_src); \ | |
421 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
422 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
423 | } | |
424 | ||
4774c8f3 | 425 | #undef _ctf_array_encoded |
180901e6 | 426 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
427 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
428 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
429 | ||
4774c8f3 MD |
430 | #undef _ctf_sequence_encoded |
431 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
180901e6 | 432 | _src_length, _encoding, _nowrite) \ |
1c324e59 | 433 | { \ |
d71b57b9 | 434 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
435 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
436 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
437 | } \ | |
438 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
439 | __chan->ops->event_write(&__ctx, _src, \ | |
440 | sizeof(_type) * __get_dynamic_len(dest)); | |
441 | ||
4774c8f3 | 442 | #undef _ctf_string |
180901e6 | 443 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
444 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
445 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
446 | ||
447 | /* Beware: this get len actually consumes the len value */ | |
448 | #undef __get_dynamic_len | |
d71b57b9 | 449 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
450 | |
451 | #undef TP_ARGS | |
2eda209b | 452 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
453 | |
454 | #undef TP_FIELDS | |
2eda209b | 455 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 456 | |
1ddfd641 MD |
457 | /* |
458 | * Using twice size for filter stack data to hold size and pointer for | |
459 | * each field (worse case). For integers, max size required is 64-bit. | |
460 | * Same for double-precision floats. Those fit within | |
461 | * 2*sizeof(unsigned long) for all supported architectures. | |
61ce3223 | 462 | * Perform UNION (||) of filter runtime list. |
1ddfd641 | 463 | */ |
1c324e59 MD |
464 | #undef TRACEPOINT_EVENT_CLASS |
465 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
466 | static lttng_ust_notrace \ |
467 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \ | |
468 | static \ | |
469 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 | 470 | { \ |
7dd08bec MD |
471 | struct lttng_event *__event = __tp_data; \ |
472 | struct lttng_channel *__chan = __event->chan; \ | |
f280cb51 | 473 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
474 | size_t __event_len, __event_align; \ |
475 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 476 | union { \ |
1ddfd641 MD |
477 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
478 | char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
d71b57b9 | 479 | } __stackvar; \ |
1c324e59 MD |
480 | int __ret; \ |
481 | \ | |
482 | if (0) \ | |
483 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
484 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
485 | return; \ | |
486 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
487 | return; \ | |
488 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
489 | return; \ | |
e58095ef | 490 | if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \ |
f488575f | 491 | struct lttng_bytecode_runtime *bc_runtime; \ |
dcdeaff0 | 492 | int __filter_record = __event->has_enablers_without_bytecode; \ |
f488575f | 493 | \ |
1ddfd641 | 494 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ |
f488575f | 495 | _TP_ARGS_DATA_VAR(_args)); \ |
e58095ef | 496 | cds_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
61ce3223 | 497 | if (caa_unlikely(bc_runtime->filter(bc_runtime, \ |
8a92ed2a MD |
498 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
499 | __filter_record = 1; \ | |
f488575f | 500 | } \ |
8a92ed2a | 501 | if (caa_likely(!__filter_record)) \ |
61ce3223 | 502 | return; \ |
1ddfd641 MD |
503 | } \ |
504 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
505 | _TP_ARGS_DATA_VAR(_args)); \ |
506 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
507 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
508 | __event_align, -1, __chan->handle); \ | |
509 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
510 | if (__ret < 0) \ | |
511 | return; \ | |
512 | _fields \ | |
513 | __chan->ops->event_commit(&__ctx); \ | |
514 | } | |
515 | ||
516 | #include TRACEPOINT_INCLUDE | |
517 | ||
518 | #undef __get_dynamic_len | |
519 | ||
68755429 MD |
520 | /* |
521 | * Stage 5.1 of tracepoint event generation. | |
522 | * | |
523 | * Create probe signature | |
524 | */ | |
525 | ||
526 | /* Reset all macros within TRACEPOINT_EVENT */ | |
527 | #include <lttng/ust-tracepoint-event-reset.h> | |
528 | ||
529 | #undef TP_ARGS | |
2eda209b | 530 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
531 | |
532 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
533 | |
534 | #undef TRACEPOINT_EVENT_CLASS | |
535 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
536 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
9eb06182 | 537 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
538 | |
539 | #include TRACEPOINT_INCLUDE | |
540 | ||
9eb06182 MD |
541 | #undef _TP_EXTRACT_STRING2 |
542 | ||
05ceaafd | 543 | /* |
882a56d7 | 544 | * Stage 6 of tracepoint event generation. |
1c324e59 | 545 | * |
df854e41 MD |
546 | * Tracepoint loglevel mapping definition generation. We generate a |
547 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
548 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
549 | * the compiler will complain. | |
05ceaafd MD |
550 | */ |
551 | ||
552 | /* Reset all macros within TRACEPOINT_EVENT */ | |
553 | #include <lttng/ust-tracepoint-event-reset.h> | |
554 | ||
555 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
556 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
557 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
558 | static const int *_loglevel___##__provider##___##__name = \ | |
559 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
560 | |
561 | #include TRACEPOINT_INCLUDE | |
562 | ||
6ddc916d MD |
563 | /* |
564 | * Stage 6.1 of tracepoint event generation. | |
565 | * | |
566 | * Tracepoint UML URI info. | |
567 | */ | |
568 | ||
569 | /* Reset all macros within TRACEPOINT_EVENT */ | |
570 | #include <lttng/ust-tracepoint-event-reset.h> | |
571 | ||
572 | #undef TRACEPOINT_MODEL_EMF_URI | |
573 | #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \ | |
574 | static const char *_model_emf_uri___##__provider##___##__name = __uri; | |
575 | ||
576 | #include TRACEPOINT_INCLUDE | |
577 | ||
df854e41 | 578 | /* |
882a56d7 | 579 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
580 | * |
581 | * Create events description structures. We use a weakref because | |
582 | * loglevels are optional. If not declared, the event will point to the | |
583 | * a loglevel that contains NULL. | |
584 | */ | |
585 | ||
586 | /* Reset all macros within TRACEPOINT_EVENT */ | |
587 | #include <lttng/ust-tracepoint-event-reset.h> | |
588 | ||
589 | #undef TRACEPOINT_EVENT_INSTANCE | |
590 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
591 | static const int * \ |
592 | __ref_loglevel___##_provider##___##_name \ | |
593 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
6ddc916d MD |
594 | static const char * \ |
595 | __ref_model_emf_uri___##_provider##___##_name \ | |
596 | __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\ | |
df854e41 MD |
597 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
598 | .fields = __event_fields___##_provider##___##_template, \ | |
599 | .name = #_provider ":" #_name, \ | |
fbdeb5ec | 600 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
df854e41 | 601 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 602 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 603 | .signature = __tp_event_signature___##_provider##___##_template, \ |
6ddc916d | 604 | .u.ext.model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \ |
df854e41 MD |
605 | }; |
606 | ||
607 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 608 | |
df854e41 | 609 | /* |
882a56d7 | 610 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
611 | * |
612 | * Create array of events. | |
613 | */ | |
614 | ||
615 | /* Reset all macros within TRACEPOINT_EVENT */ | |
616 | #include <lttng/ust-tracepoint-event-reset.h> | |
617 | ||
618 | #undef TRACEPOINT_EVENT_INSTANCE | |
619 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
620 | &__event_desc___##_provider##_##_name, | |
621 | ||
622 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
623 | #include TRACEPOINT_INCLUDE |
624 | }; | |
625 | ||
df854e41 | 626 | |
05ceaafd | 627 | /* |
882a56d7 | 628 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
629 | * |
630 | * Create a toplevel descriptor for the whole probe. | |
631 | */ | |
632 | ||
633 | /* non-const because list head will be modified when registered. */ | |
634 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 635 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
636 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
637 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
05ceaafd MD |
638 | }; |
639 | ||
640 | /* | |
882a56d7 | 641 | * Stage 9 of tracepoint event generation. |
05ceaafd | 642 | * |
1c324e59 | 643 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
644 | * |
645 | * Generate the constructor as an externally visible symbol for use when | |
646 | * linking the probe statically. | |
1c324e59 MD |
647 | */ |
648 | ||
649 | /* Reset all macros within TRACEPOINT_EVENT */ | |
650 | #include <lttng/ust-tracepoint-event-reset.h> | |
a8909ba5 PW |
651 | static void lttng_ust_notrace __attribute__((constructor)) |
652 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void); | |
653 | static void | |
1c324e59 MD |
654 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
655 | { | |
656 | int ret; | |
657 | ||
e8bd1da7 MD |
658 | /* |
659 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
660 | * static inline function that ensures every probe PROVIDER | |
661 | * argument match the provider within which they appear. It | |
662 | * calls empty static inline functions, and therefore has no | |
663 | * runtime effect. However, if it detects an error, a linker | |
664 | * error will appear. | |
665 | */ | |
666 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
7dd08bec | 667 | ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 MD |
668 | assert(!ret); |
669 | } | |
670 | ||
a8909ba5 PW |
671 | static void lttng_ust_notrace __attribute__((destructor)) |
672 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void); | |
673 | static void | |
1c324e59 MD |
674 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
675 | { | |
7dd08bec | 676 | lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 | 677 | } |
628e1d81 MD |
678 | |
679 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |