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