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> | |
62708e69 | 16 | #include <stdlib.h> |
1c324e59 MD |
17 | #include <urcu/compiler.h> |
18 | #include <lttng/ust-events.h> | |
1c324e59 | 19 | #include <lttng/ringbuffer-config.h> |
44c72f10 | 20 | #include <string.h> |
1c324e59 MD |
21 | |
22 | /* | |
23 | * Macro declarations used for all stages. | |
24 | */ | |
25 | ||
26 | #undef ctf_integer | |
27 | #define ctf_integer(_type, _item, _src) \ | |
28 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) | |
29 | ||
30 | #undef ctf_integer_hex | |
31 | #define ctf_integer_hex(_type, _item, _src) \ | |
32 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) | |
33 | ||
34 | #undef ctf_integer_network | |
35 | #define ctf_integer_network(_type, _item, _src) \ | |
36 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) | |
37 | ||
38 | #undef ctf_integer_network_hex | |
39 | #define ctf_integer_network_hex(_type, _item, _src) \ | |
40 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) | |
41 | ||
42 | /* ctf_float is redefined at each step */ | |
43 | ||
44 | #undef ctf_array | |
45 | #define ctf_array(_type, _item, _src, _length) \ | |
46 | ctf_array_encoded(_type, _item, _src, _length, none) | |
47 | ||
48 | #undef ctf_array_text | |
49 | #define ctf_array_text(_type, _item, _src, _length) \ | |
50 | ctf_array_encoded(_type, _item, _src, _length, UTF8) | |
51 | ||
52 | #undef ctf_sequence | |
53 | #define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ | |
54 | ctf_sequence_encoded(_type, _item, _src, \ | |
55 | _length_type, _src_length, none) | |
56 | ||
57 | #undef ctf_sequence_text | |
58 | #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ | |
59 | ctf_sequence_encoded(_type, _item, _src, \ | |
60 | _length_type, _src_length, UTF8) | |
61 | ||
62 | /* ctf_string is redefined at each step */ | |
63 | ||
64 | /* | |
65 | * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the | |
66 | * same arguments and having the same field layout. | |
67 | * | |
68 | * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with | |
69 | * its own provider and name. It refers to a class (template). | |
70 | * | |
71 | * TRACEPOINT_EVENT declared both a class and an instance and does a | |
72 | * direct mapping from the instance to the class. | |
73 | */ | |
74 | ||
75 | #undef TRACEPOINT_EVENT | |
76 | #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ | |
77 | TRACEPOINT_EVENT_CLASS(_provider, _name, \ | |
78 | _TP_PARAMS(_args), \ | |
79 | _TP_PARAMS(_fields)) \ | |
80 | TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ | |
68755429 | 81 | _TP_PARAMS(_args)) |
1c324e59 MD |
82 | |
83 | /* Helpers */ | |
84 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
85 | ||
86 | #define _tp_max_t(type, x, y) \ | |
87 | ({ \ | |
88 | type __max1 = (x); \ | |
89 | type __max2 = (y); \ | |
90 | __max1 > __max2 ? __max1: __max2; \ | |
91 | }) | |
92 | ||
93 | /* | |
94 | * Stage 0 of tracepoint event generation. | |
95 | * | |
96 | * Check that each TRACEPOINT_EVENT provider argument match the | |
97 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
98 | */ | |
99 | ||
100 | /* Reset all macros within TRACEPOINT_EVENT */ | |
101 | #include <lttng/ust-tracepoint-event-reset.h> | |
102 | ||
103 | static inline | |
104 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
105 | { | |
106 | } | |
107 | ||
108 | #undef TRACEPOINT_EVENT_CLASS | |
109 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
110 | __tracepoint_provider_mismatch_##_provider(); | |
111 | ||
112 | #undef TRACEPOINT_EVENT_INSTANCE | |
113 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
114 | __tracepoint_provider_mismatch_##_provider(); | |
115 | ||
f7f70ed7 | 116 | static inline |
1c324e59 MD |
117 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) |
118 | { | |
119 | #include TRACEPOINT_INCLUDE | |
120 | } | |
121 | ||
f56cd1d5 MD |
122 | /* |
123 | * Stage 0.1 of tracepoint event generation. | |
124 | * | |
125 | * Check that each TRACEPOINT_EVENT provider:name does not exceed the | |
126 | * tracepoint name length limit. | |
127 | */ | |
128 | ||
129 | /* Reset all macros within TRACEPOINT_EVENT */ | |
130 | #include <lttng/ust-tracepoint-event-reset.h> | |
131 | ||
132 | #undef TRACEPOINT_EVENT_INSTANCE | |
133 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
134 | static const char \ | |
135 | __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \ | |
136 | __attribute__((unused)) = \ | |
137 | #_provider ":" #_name; | |
138 | ||
139 | #include TRACEPOINT_INCLUDE | |
140 | ||
1c324e59 MD |
141 | /* |
142 | * Stage 1 of tracepoint event generation. | |
143 | * | |
144 | * Create event field type metadata section. | |
145 | * Each event produce an array of fields. | |
146 | */ | |
147 | ||
148 | /* Reset all macros within TRACEPOINT_EVENT */ | |
149 | #include <lttng/ust-tracepoint-event-reset.h> | |
150 | ||
151 | #undef ctf_integer_ext | |
152 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
153 | { \ | |
154 | .name = #_item, \ | |
155 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
156 | }, | |
157 | ||
158 | #undef ctf_float | |
159 | #define ctf_float(_type, _item, _src) \ | |
160 | { \ | |
161 | .name = #_item, \ | |
162 | .type = __type_float(_type), \ | |
163 | }, | |
164 | ||
165 | #undef ctf_array_encoded | |
166 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
167 | { \ | |
168 | .name = #_item, \ | |
169 | .type = \ | |
170 | { \ | |
171 | .atype = atype_array, \ | |
172 | .u.array = \ | |
173 | { \ | |
174 | .length = _length, \ | |
175 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
176 | }, \ | |
177 | }, \ | |
178 | }, | |
179 | ||
180 | #undef ctf_sequence_encoded | |
181 | #define ctf_sequence_encoded(_type, _item, _src, \ | |
182 | _length_type, _src_length, _encoding) \ | |
183 | { \ | |
184 | .name = #_item, \ | |
185 | .type = \ | |
186 | { \ | |
187 | .atype = atype_sequence, \ | |
188 | .u.sequence = \ | |
189 | { \ | |
190 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
191 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
192 | }, \ | |
193 | }, \ | |
194 | }, | |
195 | ||
196 | #undef ctf_string | |
197 | #define ctf_string(_item, _src) \ | |
198 | { \ | |
199 | .name = #_item, \ | |
200 | .type = \ | |
201 | { \ | |
202 | .atype = atype_string, \ | |
203 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
204 | }, \ | |
205 | }, | |
206 | ||
207 | #undef TP_FIELDS | |
69b240d3 | 208 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
209 | |
210 | #undef TRACEPOINT_EVENT_CLASS | |
211 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
212 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
213 | _fields \ | |
214 | }; | |
215 | ||
216 | #include TRACEPOINT_INCLUDE | |
217 | ||
218 | /* | |
219 | * Stage 2 of tracepoint event generation. | |
220 | * | |
221 | * Create probe callback prototypes. | |
222 | */ | |
223 | ||
224 | /* Reset all macros within TRACEPOINT_EVENT */ | |
225 | #include <lttng/ust-tracepoint-event-reset.h> | |
226 | ||
227 | #undef TP_ARGS | |
69b240d3 | 228 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
229 | |
230 | #undef TRACEPOINT_EVENT_CLASS | |
231 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
232 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
233 | ||
234 | #include TRACEPOINT_INCLUDE | |
235 | ||
236 | /* | |
237 | * Stage 3 of tracepoint event generation. | |
238 | * | |
1c324e59 MD |
239 | * Create static inline function that calculates event size. |
240 | */ | |
241 | ||
242 | /* Reset all macros within TRACEPOINT_EVENT */ | |
243 | #include <lttng/ust-tracepoint-event-reset.h> | |
244 | ||
245 | #undef ctf_integer_ext | |
246 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
247 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
248 | __event_len += sizeof(_type); | |
249 | ||
250 | #undef ctf_float | |
251 | #define ctf_float(_type, _item, _src) \ | |
252 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
253 | __event_len += sizeof(_type); | |
254 | ||
255 | #undef ctf_array_encoded | |
256 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
257 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
258 | __event_len += sizeof(_type) * (_length); | |
259 | ||
260 | #undef ctf_sequence_encoded | |
261 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
262 | _src_length, _encoding) \ | |
263 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ | |
264 | __event_len += sizeof(_length_type); \ | |
265 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
266 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
267 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
268 | __dynamic_len_idx++; | |
269 | ||
270 | #undef ctf_string | |
271 | #define ctf_string(_item, _src) \ | |
272 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; | |
273 | ||
274 | #undef TP_ARGS | |
69b240d3 | 275 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
276 | |
277 | #undef TP_FIELDS | |
69b240d3 | 278 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
279 | |
280 | #undef TRACEPOINT_EVENT_CLASS | |
281 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
282 | static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
283 | { \ | |
284 | size_t __event_len = 0; \ | |
285 | unsigned int __dynamic_len_idx = 0; \ | |
286 | \ | |
287 | if (0) \ | |
288 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
289 | _fields \ | |
290 | return __event_len; \ | |
291 | } | |
292 | ||
293 | #include TRACEPOINT_INCLUDE | |
294 | ||
295 | /* | |
df854e41 | 296 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
297 | * |
298 | * Create static inline function that calculates event payload alignment. | |
299 | */ | |
300 | ||
301 | /* Reset all macros within TRACEPOINT_EVENT */ | |
302 | #include <lttng/ust-tracepoint-event-reset.h> | |
303 | ||
304 | #undef ctf_integer_ext | |
305 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
306 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
307 | ||
308 | #undef ctf_float | |
309 | #define ctf_float(_type, _item, _src) \ | |
310 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
311 | ||
312 | #undef ctf_array_encoded | |
313 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
314 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
315 | ||
316 | #undef ctf_sequence_encoded | |
317 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
318 | _src_length, _encoding) \ | |
319 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ | |
320 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
321 | ||
322 | #undef ctf_string | |
323 | #define ctf_string(_item, _src) | |
324 | ||
325 | #undef TP_ARGS | |
69b240d3 | 326 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
327 | |
328 | #undef TP_FIELDS | |
69b240d3 | 329 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
330 | |
331 | #undef TRACEPOINT_EVENT_CLASS | |
332 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
333 | static inline \ | |
334 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
335 | { \ | |
336 | size_t __event_align = 1; \ | |
337 | _fields \ | |
338 | return __event_align; \ | |
339 | } | |
340 | ||
341 | #include TRACEPOINT_INCLUDE | |
342 | ||
343 | ||
344 | /* | |
df854e41 | 345 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
346 | * |
347 | * Create the probe function. This function calls event size calculation | |
348 | * and writes event data into the buffer. | |
349 | */ | |
350 | ||
351 | /* Reset all macros within TRACEPOINT_EVENT */ | |
352 | #include <lttng/ust-tracepoint-event-reset.h> | |
353 | ||
354 | #undef ctf_integer_ext | |
355 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
356 | { \ | |
357 | _type __tmp = (_src); \ | |
358 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
359 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
360 | } | |
361 | ||
362 | #undef ctf_float | |
363 | #define ctf_float(_type, _item, _src) \ | |
364 | { \ | |
365 | _type __tmp = (_src); \ | |
366 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
367 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
368 | } | |
369 | ||
370 | #undef ctf_array_encoded | |
371 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
372 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
373 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
374 | ||
375 | #undef ctf_sequence_encoded | |
376 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
377 | _src_length, _encoding) \ | |
378 | { \ | |
379 | _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ | |
380 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
381 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
382 | } \ | |
383 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
384 | __chan->ops->event_write(&__ctx, _src, \ | |
385 | sizeof(_type) * __get_dynamic_len(dest)); | |
386 | ||
387 | #undef ctf_string | |
388 | #define ctf_string(_item, _src) \ | |
389 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ | |
390 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
391 | ||
392 | /* Beware: this get len actually consumes the len value */ | |
393 | #undef __get_dynamic_len | |
394 | #define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++] | |
395 | ||
396 | #undef TP_ARGS | |
69b240d3 | 397 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
398 | |
399 | #undef TP_FIELDS | |
69b240d3 | 400 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
401 | |
402 | #undef TRACEPOINT_EVENT_CLASS | |
403 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
404 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\ | |
405 | { \ | |
f280cb51 | 406 | struct ltt_event *__event = __tp_data; \ |
1c324e59 | 407 | struct ltt_channel *__chan = __event->chan; \ |
f280cb51 | 408 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
409 | size_t __event_len, __event_align; \ |
410 | size_t __dynamic_len_idx = 0; \ | |
411 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
412 | int __ret; \ | |
413 | \ | |
414 | if (0) \ | |
415 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
416 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
417 | return; \ | |
418 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
419 | return; \ | |
420 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
421 | return; \ | |
422 | __event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\ | |
423 | _TP_ARGS_DATA_VAR(_args)); \ | |
424 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
425 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
426 | __event_align, -1, __chan->handle); \ | |
427 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
428 | if (__ret < 0) \ | |
429 | return; \ | |
430 | _fields \ | |
431 | __chan->ops->event_commit(&__ctx); \ | |
432 | } | |
433 | ||
434 | #include TRACEPOINT_INCLUDE | |
435 | ||
436 | #undef __get_dynamic_len | |
437 | ||
68755429 MD |
438 | /* |
439 | * Stage 5.1 of tracepoint event generation. | |
440 | * | |
441 | * Create probe signature | |
442 | */ | |
443 | ||
444 | /* Reset all macros within TRACEPOINT_EVENT */ | |
445 | #include <lttng/ust-tracepoint-event-reset.h> | |
446 | ||
447 | #undef TP_ARGS | |
69b240d3 | 448 | #define TP_ARGS(...) __VA_ARGS__ |
fa790c0b MD |
449 | |
450 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
451 | |
452 | #undef TRACEPOINT_EVENT_CLASS | |
453 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
454 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
fa790c0b | 455 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
456 | |
457 | #include TRACEPOINT_INCLUDE | |
458 | ||
fa790c0b MD |
459 | #undef _TP_EXTRACT_STRING2 |
460 | ||
05ceaafd | 461 | /* |
882a56d7 | 462 | * Stage 6 of tracepoint event generation. |
1c324e59 | 463 | * |
df854e41 MD |
464 | * Tracepoint loglevel mapping definition generation. We generate a |
465 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
466 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
467 | * the compiler will complain. | |
05ceaafd MD |
468 | */ |
469 | ||
470 | /* Reset all macros within TRACEPOINT_EVENT */ | |
471 | #include <lttng/ust-tracepoint-event-reset.h> | |
472 | ||
473 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
474 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
475 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
476 | static const int *_loglevel___##__provider##___##__name = \ | |
477 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
478 | |
479 | #include TRACEPOINT_INCLUDE | |
480 | ||
481 | /* | |
882a56d7 | 482 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
483 | * |
484 | * Create events description structures. We use a weakref because | |
485 | * loglevels are optional. If not declared, the event will point to the | |
486 | * a loglevel that contains NULL. | |
487 | */ | |
488 | ||
489 | /* Reset all macros within TRACEPOINT_EVENT */ | |
490 | #include <lttng/ust-tracepoint-event-reset.h> | |
491 | ||
492 | #undef TRACEPOINT_EVENT_INSTANCE | |
493 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
494 | static const int * \ |
495 | __ref_loglevel___##_provider##___##_name \ | |
496 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
df854e41 MD |
497 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
498 | .fields = __event_fields___##_provider##___##_template, \ | |
499 | .name = #_provider ":" #_name, \ | |
0264ec6c | 500 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
df854e41 | 501 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 502 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 503 | .signature = __tp_event_signature___##_provider##___##_template, \ |
df854e41 MD |
504 | }; |
505 | ||
506 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 507 | |
df854e41 | 508 | /* |
882a56d7 | 509 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
510 | * |
511 | * Create array of events. | |
512 | */ | |
513 | ||
514 | /* Reset all macros within TRACEPOINT_EVENT */ | |
515 | #include <lttng/ust-tracepoint-event-reset.h> | |
516 | ||
517 | #undef TRACEPOINT_EVENT_INSTANCE | |
518 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
519 | &__event_desc___##_provider##_##_name, | |
520 | ||
521 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
522 | #include TRACEPOINT_INCLUDE |
523 | }; | |
524 | ||
df854e41 | 525 | |
05ceaafd | 526 | /* |
882a56d7 | 527 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
528 | * |
529 | * Create a toplevel descriptor for the whole probe. | |
530 | */ | |
531 | ||
532 | /* non-const because list head will be modified when registered. */ | |
533 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 534 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
535 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
536 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
05ceaafd MD |
537 | }; |
538 | ||
539 | /* | |
882a56d7 | 540 | * Stage 9 of tracepoint event generation. |
05ceaafd | 541 | * |
1c324e59 | 542 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
543 | * |
544 | * Generate the constructor as an externally visible symbol for use when | |
545 | * linking the probe statically. | |
1c324e59 MD |
546 | */ |
547 | ||
548 | /* Reset all macros within TRACEPOINT_EVENT */ | |
549 | #include <lttng/ust-tracepoint-event-reset.h> | |
1c324e59 MD |
550 | static void __attribute__((constructor)) |
551 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) | |
552 | { | |
553 | int ret; | |
554 | ||
f7f70ed7 MD |
555 | /* |
556 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
557 | * static inline function that ensures every probe PROVIDER | |
558 | * argument match the provider within which they appear. It | |
559 | * calls empty static inline functions, and therefore has no | |
560 | * runtime effect. However, if it detects an error, a linker | |
561 | * error will appear. | |
562 | */ | |
563 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
62708e69 MD |
564 | if (ret) { |
565 | fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret); | |
566 | abort(); | |
567 | } | |
1c324e59 MD |
568 | } |
569 | ||
570 | static void __attribute__((destructor)) | |
571 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) | |
572 | { | |
573 | ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); | |
574 | } | |
628e1d81 MD |
575 | |
576 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |