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 MD |
20 | |
21 | /* | |
22 | * Macro declarations used for all stages. | |
23 | */ | |
24 | ||
25 | #undef ctf_integer | |
26 | #define ctf_integer(_type, _item, _src) \ | |
27 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) | |
28 | ||
29 | #undef ctf_integer_hex | |
30 | #define ctf_integer_hex(_type, _item, _src) \ | |
31 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) | |
32 | ||
33 | #undef ctf_integer_network | |
34 | #define ctf_integer_network(_type, _item, _src) \ | |
35 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) | |
36 | ||
37 | #undef ctf_integer_network_hex | |
38 | #define ctf_integer_network_hex(_type, _item, _src) \ | |
39 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) | |
40 | ||
41 | /* ctf_float is redefined at each step */ | |
42 | ||
43 | #undef ctf_array | |
44 | #define ctf_array(_type, _item, _src, _length) \ | |
45 | ctf_array_encoded(_type, _item, _src, _length, none) | |
46 | ||
47 | #undef ctf_array_text | |
48 | #define ctf_array_text(_type, _item, _src, _length) \ | |
49 | ctf_array_encoded(_type, _item, _src, _length, UTF8) | |
50 | ||
51 | #undef ctf_sequence | |
52 | #define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ | |
53 | ctf_sequence_encoded(_type, _item, _src, \ | |
54 | _length_type, _src_length, none) | |
55 | ||
56 | #undef ctf_sequence_text | |
57 | #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ | |
58 | ctf_sequence_encoded(_type, _item, _src, \ | |
59 | _length_type, _src_length, UTF8) | |
60 | ||
61 | /* ctf_string is redefined at each step */ | |
62 | ||
63 | /* | |
64 | * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the | |
65 | * same arguments and having the same field layout. | |
66 | * | |
67 | * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with | |
68 | * its own provider and name. It refers to a class (template). | |
69 | * | |
70 | * TRACEPOINT_EVENT declared both a class and an instance and does a | |
71 | * direct mapping from the instance to the class. | |
72 | */ | |
73 | ||
74 | #undef TRACEPOINT_EVENT | |
75 | #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ | |
76 | TRACEPOINT_EVENT_CLASS(_provider, _name, \ | |
77 | _TP_PARAMS(_args), \ | |
78 | _TP_PARAMS(_fields)) \ | |
79 | TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ | |
68755429 | 80 | _TP_PARAMS(_args)) |
1c324e59 MD |
81 | |
82 | /* Helpers */ | |
83 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
84 | ||
85 | #define _tp_max_t(type, x, y) \ | |
86 | ({ \ | |
87 | type __max1 = (x); \ | |
88 | type __max2 = (y); \ | |
89 | __max1 > __max2 ? __max1: __max2; \ | |
90 | }) | |
91 | ||
92 | /* | |
93 | * Stage 0 of tracepoint event generation. | |
94 | * | |
95 | * Check that each TRACEPOINT_EVENT provider argument match the | |
96 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
97 | */ | |
98 | ||
99 | /* Reset all macros within TRACEPOINT_EVENT */ | |
100 | #include <lttng/ust-tracepoint-event-reset.h> | |
101 | ||
102 | static inline | |
103 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
104 | { | |
105 | } | |
106 | ||
107 | #undef TRACEPOINT_EVENT_CLASS | |
108 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
109 | __tracepoint_provider_mismatch_##_provider(); | |
110 | ||
111 | #undef TRACEPOINT_EVENT_INSTANCE | |
112 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
113 | __tracepoint_provider_mismatch_##_provider(); | |
114 | ||
115 | static __attribute__((unused)) | |
116 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) | |
117 | { | |
118 | #include TRACEPOINT_INCLUDE | |
119 | } | |
120 | ||
f56cd1d5 MD |
121 | /* |
122 | * Stage 0.1 of tracepoint event generation. | |
123 | * | |
124 | * Check that each TRACEPOINT_EVENT provider:name does not exceed the | |
125 | * tracepoint name length limit. | |
126 | */ | |
127 | ||
128 | /* Reset all macros within TRACEPOINT_EVENT */ | |
129 | #include <lttng/ust-tracepoint-event-reset.h> | |
130 | ||
131 | #undef TRACEPOINT_EVENT_INSTANCE | |
132 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
133 | static const char \ | |
134 | __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \ | |
135 | __attribute__((unused)) = \ | |
136 | #_provider ":" #_name; | |
137 | ||
138 | #include TRACEPOINT_INCLUDE | |
139 | ||
1c324e59 MD |
140 | /* |
141 | * Stage 1 of tracepoint event generation. | |
142 | * | |
143 | * Create event field type metadata section. | |
144 | * Each event produce an array of fields. | |
145 | */ | |
146 | ||
147 | /* Reset all macros within TRACEPOINT_EVENT */ | |
148 | #include <lttng/ust-tracepoint-event-reset.h> | |
149 | ||
150 | #undef ctf_integer_ext | |
151 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
152 | { \ | |
153 | .name = #_item, \ | |
154 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
155 | }, | |
156 | ||
157 | #undef ctf_float | |
158 | #define ctf_float(_type, _item, _src) \ | |
159 | { \ | |
160 | .name = #_item, \ | |
161 | .type = __type_float(_type), \ | |
162 | }, | |
163 | ||
164 | #undef ctf_array_encoded | |
165 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
166 | { \ | |
167 | .name = #_item, \ | |
168 | .type = \ | |
169 | { \ | |
170 | .atype = atype_array, \ | |
171 | .u.array = \ | |
172 | { \ | |
173 | .length = _length, \ | |
174 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
175 | }, \ | |
176 | }, \ | |
177 | }, | |
178 | ||
179 | #undef ctf_sequence_encoded | |
180 | #define ctf_sequence_encoded(_type, _item, _src, \ | |
181 | _length_type, _src_length, _encoding) \ | |
182 | { \ | |
183 | .name = #_item, \ | |
184 | .type = \ | |
185 | { \ | |
186 | .atype = atype_sequence, \ | |
187 | .u.sequence = \ | |
188 | { \ | |
189 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
190 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
191 | }, \ | |
192 | }, \ | |
193 | }, | |
194 | ||
195 | #undef ctf_string | |
196 | #define ctf_string(_item, _src) \ | |
197 | { \ | |
198 | .name = #_item, \ | |
199 | .type = \ | |
200 | { \ | |
201 | .atype = atype_string, \ | |
202 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
203 | }, \ | |
204 | }, | |
205 | ||
206 | #undef TP_FIELDS | |
2eda209b | 207 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
208 | |
209 | #undef TRACEPOINT_EVENT_CLASS | |
210 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
211 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
212 | _fields \ | |
213 | }; | |
214 | ||
215 | #include TRACEPOINT_INCLUDE | |
216 | ||
217 | /* | |
218 | * Stage 2 of tracepoint event generation. | |
219 | * | |
220 | * Create probe callback prototypes. | |
221 | */ | |
222 | ||
223 | /* Reset all macros within TRACEPOINT_EVENT */ | |
224 | #include <lttng/ust-tracepoint-event-reset.h> | |
225 | ||
226 | #undef TP_ARGS | |
2eda209b | 227 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
228 | |
229 | #undef TRACEPOINT_EVENT_CLASS | |
230 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
231 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
232 | ||
233 | #include TRACEPOINT_INCLUDE | |
234 | ||
235 | /* | |
236 | * Stage 3 of tracepoint event generation. | |
237 | * | |
1c324e59 MD |
238 | * Create static inline function that calculates event size. |
239 | */ | |
240 | ||
241 | /* Reset all macros within TRACEPOINT_EVENT */ | |
242 | #include <lttng/ust-tracepoint-event-reset.h> | |
243 | ||
244 | #undef ctf_integer_ext | |
245 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
246 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
247 | __event_len += sizeof(_type); | |
248 | ||
249 | #undef ctf_float | |
250 | #define ctf_float(_type, _item, _src) \ | |
251 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
252 | __event_len += sizeof(_type); | |
253 | ||
254 | #undef ctf_array_encoded | |
255 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
256 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
257 | __event_len += sizeof(_type) * (_length); | |
258 | ||
259 | #undef ctf_sequence_encoded | |
260 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
261 | _src_length, _encoding) \ | |
262 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ | |
263 | __event_len += sizeof(_length_type); \ | |
264 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
265 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
266 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
267 | __dynamic_len_idx++; | |
268 | ||
269 | #undef ctf_string | |
270 | #define ctf_string(_item, _src) \ | |
271 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; | |
272 | ||
273 | #undef TP_ARGS | |
2eda209b | 274 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
275 | |
276 | #undef TP_FIELDS | |
2eda209b | 277 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
278 | |
279 | #undef TRACEPOINT_EVENT_CLASS | |
280 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
281 | static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
282 | { \ | |
283 | size_t __event_len = 0; \ | |
284 | unsigned int __dynamic_len_idx = 0; \ | |
285 | \ | |
286 | if (0) \ | |
287 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
288 | _fields \ | |
289 | return __event_len; \ | |
290 | } | |
291 | ||
292 | #include TRACEPOINT_INCLUDE | |
293 | ||
1ddfd641 MD |
294 | /* |
295 | * Stage 3.1 of tracepoint event generation. | |
296 | * | |
297 | * Create static inline function that layout the filter stack data. | |
298 | */ | |
299 | ||
300 | /* Reset all macros within TRACEPOINT_EVENT */ | |
301 | #include <lttng/ust-tracepoint-event-reset.h> | |
302 | ||
303 | #undef ctf_integer_ext | |
304 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
305 | if (lttng_is_signed_type(_type)) \ | |
306 | *(int64_t *) __stack_data = (int64_t) (_type) (_src); \ | |
307 | else \ | |
308 | *(uint64_t *) __stack_data = (uint64_t) (_type) (_src); \ | |
309 | __stack_data += sizeof(int64_t); | |
310 | ||
311 | #undef ctf_float | |
312 | #define ctf_float(_type, _item, _src) \ | |
313 | *(double *) __stack_data = (double) (_type) (_src); \ | |
314 | __stack_data += sizeof(double); | |
315 | ||
316 | #undef ctf_array_encoded | |
317 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
318 | *(unsigned long *) __stack_data = (unsigned long) (_length); \ | |
319 | __stack_data += sizeof(unsigned long); \ | |
320 | *(const void **) __stack_data = (_src); \ | |
321 | __stack_data += sizeof(void *); | |
322 | ||
323 | #undef ctf_sequence_encoded | |
324 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
325 | _src_length, _encoding) \ | |
326 | *(unsigned long *) __stack_data = (unsigned long) (_src_length); \ | |
327 | __stack_data += sizeof(unsigned long); \ | |
328 | *(const void **) __stack_data = (_src); \ | |
329 | __stack_data += sizeof(void *); | |
330 | ||
331 | #undef ctf_string | |
332 | #define ctf_string(_item, _src) \ | |
333 | *(unsigned long *) __stack_data = (unsigned long) (strlen(_src) + 1); \ | |
334 | __stack_data += sizeof(unsigned long); \ | |
335 | *(const void **) __stack_data = (_src); \ | |
336 | __stack_data += sizeof(void *); | |
337 | ||
338 | #undef TP_ARGS | |
339 | #define TP_ARGS(...) __VA_ARGS__ | |
340 | ||
341 | #undef TP_FIELDS | |
342 | #define TP_FIELDS(...) __VA_ARGS__ | |
343 | ||
344 | #undef TRACEPOINT_EVENT_CLASS | |
345 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
346 | static inline \ | |
347 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
348 | _TP_ARGS_DATA_PROTO(_args)) \ | |
349 | { \ | |
350 | _fields \ | |
351 | } | |
352 | ||
353 | #include TRACEPOINT_INCLUDE | |
354 | ||
355 | ||
356 | ||
1c324e59 | 357 | /* |
df854e41 | 358 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
359 | * |
360 | * Create static inline function that calculates event payload alignment. | |
361 | */ | |
362 | ||
363 | /* Reset all macros within TRACEPOINT_EVENT */ | |
364 | #include <lttng/ust-tracepoint-event-reset.h> | |
365 | ||
366 | #undef ctf_integer_ext | |
367 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
368 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
369 | ||
370 | #undef ctf_float | |
371 | #define ctf_float(_type, _item, _src) \ | |
372 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
373 | ||
374 | #undef ctf_array_encoded | |
375 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
376 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
377 | ||
378 | #undef ctf_sequence_encoded | |
379 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
380 | _src_length, _encoding) \ | |
381 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ | |
382 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
383 | ||
384 | #undef ctf_string | |
385 | #define ctf_string(_item, _src) | |
386 | ||
387 | #undef TP_ARGS | |
2eda209b | 388 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
389 | |
390 | #undef TP_FIELDS | |
2eda209b | 391 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
392 | |
393 | #undef TRACEPOINT_EVENT_CLASS | |
394 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
395 | static inline \ | |
396 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
397 | { \ | |
398 | size_t __event_align = 1; \ | |
399 | _fields \ | |
400 | return __event_align; \ | |
401 | } | |
402 | ||
403 | #include TRACEPOINT_INCLUDE | |
404 | ||
405 | ||
406 | /* | |
df854e41 | 407 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
408 | * |
409 | * Create the probe function. This function calls event size calculation | |
410 | * and writes event data into the buffer. | |
411 | */ | |
412 | ||
413 | /* Reset all macros within TRACEPOINT_EVENT */ | |
414 | #include <lttng/ust-tracepoint-event-reset.h> | |
415 | ||
416 | #undef ctf_integer_ext | |
417 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
418 | { \ | |
419 | _type __tmp = (_src); \ | |
420 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
421 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
422 | } | |
423 | ||
424 | #undef ctf_float | |
425 | #define ctf_float(_type, _item, _src) \ | |
426 | { \ | |
427 | _type __tmp = (_src); \ | |
428 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
429 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
430 | } | |
431 | ||
432 | #undef ctf_array_encoded | |
433 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
434 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
435 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
436 | ||
437 | #undef ctf_sequence_encoded | |
438 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
439 | _src_length, _encoding) \ | |
440 | { \ | |
d71b57b9 | 441 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
442 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
443 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
444 | } \ | |
445 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
446 | __chan->ops->event_write(&__ctx, _src, \ | |
447 | sizeof(_type) * __get_dynamic_len(dest)); | |
448 | ||
449 | #undef ctf_string | |
450 | #define ctf_string(_item, _src) \ | |
451 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ | |
452 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
453 | ||
454 | /* Beware: this get len actually consumes the len value */ | |
455 | #undef __get_dynamic_len | |
d71b57b9 | 456 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
457 | |
458 | #undef TP_ARGS | |
2eda209b | 459 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
460 | |
461 | #undef TP_FIELDS | |
2eda209b | 462 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 463 | |
1ddfd641 MD |
464 | /* |
465 | * Using twice size for filter stack data to hold size and pointer for | |
466 | * each field (worse case). For integers, max size required is 64-bit. | |
467 | * Same for double-precision floats. Those fit within | |
468 | * 2*sizeof(unsigned long) for all supported architectures. | |
469 | */ | |
1c324e59 MD |
470 | #undef TRACEPOINT_EVENT_CLASS |
471 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
472 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\ | |
473 | { \ | |
f280cb51 | 474 | struct ltt_event *__event = __tp_data; \ |
1c324e59 | 475 | struct ltt_channel *__chan = __event->chan; \ |
f280cb51 | 476 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
1c324e59 MD |
477 | size_t __event_len, __event_align; \ |
478 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 479 | union { \ |
1ddfd641 MD |
480 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
481 | char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ | |
d71b57b9 | 482 | } __stackvar; \ |
1c324e59 MD |
483 | int __ret; \ |
484 | \ | |
485 | if (0) \ | |
486 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
487 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
488 | return; \ | |
489 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
490 | return; \ | |
491 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
492 | return; \ | |
1ddfd641 MD |
493 | if (caa_unlikely(__event->filter)) { \ |
494 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ | |
495 | _TP_ARGS_DATA_VAR(_args)); \ | |
496 | if (caa_likely(!__event->filter(__event->filter_data, __stackvar.__filter_stack_data))) \ | |
497 | return; \ | |
498 | } \ | |
499 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
500 | _TP_ARGS_DATA_VAR(_args)); \ |
501 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
502 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
503 | __event_align, -1, __chan->handle); \ | |
504 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
505 | if (__ret < 0) \ | |
506 | return; \ | |
507 | _fields \ | |
508 | __chan->ops->event_commit(&__ctx); \ | |
509 | } | |
510 | ||
511 | #include TRACEPOINT_INCLUDE | |
512 | ||
513 | #undef __get_dynamic_len | |
514 | ||
68755429 MD |
515 | /* |
516 | * Stage 5.1 of tracepoint event generation. | |
517 | * | |
518 | * Create probe signature | |
519 | */ | |
520 | ||
521 | /* Reset all macros within TRACEPOINT_EVENT */ | |
522 | #include <lttng/ust-tracepoint-event-reset.h> | |
523 | ||
524 | #undef TP_ARGS | |
2eda209b | 525 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
526 | |
527 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
528 | |
529 | #undef TRACEPOINT_EVENT_CLASS | |
530 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
531 | const char __tp_event_signature___##_provider##___##_name[] = \ | |
9eb06182 | 532 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
533 | |
534 | #include TRACEPOINT_INCLUDE | |
535 | ||
9eb06182 MD |
536 | #undef _TP_EXTRACT_STRING2 |
537 | ||
05ceaafd | 538 | /* |
882a56d7 | 539 | * Stage 6 of tracepoint event generation. |
1c324e59 | 540 | * |
df854e41 MD |
541 | * Tracepoint loglevel mapping definition generation. We generate a |
542 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
543 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
544 | * the compiler will complain. | |
05ceaafd MD |
545 | */ |
546 | ||
547 | /* Reset all macros within TRACEPOINT_EVENT */ | |
548 | #include <lttng/ust-tracepoint-event-reset.h> | |
549 | ||
550 | #undef TRACEPOINT_LOGLEVEL | |
457a6b58 MD |
551 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
552 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
553 | static const int *_loglevel___##__provider##___##__name = \ | |
554 | &_loglevel_value___##__provider##___##__name; | |
df854e41 MD |
555 | |
556 | #include TRACEPOINT_INCLUDE | |
557 | ||
558 | /* | |
882a56d7 | 559 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
560 | * |
561 | * Create events description structures. We use a weakref because | |
562 | * loglevels are optional. If not declared, the event will point to the | |
563 | * a loglevel that contains NULL. | |
564 | */ | |
565 | ||
566 | /* Reset all macros within TRACEPOINT_EVENT */ | |
567 | #include <lttng/ust-tracepoint-event-reset.h> | |
568 | ||
569 | #undef TRACEPOINT_EVENT_INSTANCE | |
570 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
571 | static const int * \ |
572 | __ref_loglevel___##_provider##___##_name \ | |
573 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
df854e41 MD |
574 | const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
575 | .fields = __event_fields___##_provider##___##_template, \ | |
576 | .name = #_provider ":" #_name, \ | |
fbdeb5ec | 577 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
df854e41 | 578 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ |
882a56d7 | 579 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 580 | .signature = __tp_event_signature___##_provider##___##_template, \ |
df854e41 MD |
581 | }; |
582 | ||
583 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 584 | |
df854e41 | 585 | /* |
882a56d7 | 586 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
587 | * |
588 | * Create array of events. | |
589 | */ | |
590 | ||
591 | /* Reset all macros within TRACEPOINT_EVENT */ | |
592 | #include <lttng/ust-tracepoint-event-reset.h> | |
593 | ||
594 | #undef TRACEPOINT_EVENT_INSTANCE | |
595 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
596 | &__event_desc___##_provider##_##_name, | |
597 | ||
598 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd MD |
599 | #include TRACEPOINT_INCLUDE |
600 | }; | |
601 | ||
df854e41 | 602 | |
05ceaafd | 603 | /* |
882a56d7 | 604 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
605 | * |
606 | * Create a toplevel descriptor for the whole probe. | |
607 | */ | |
608 | ||
609 | /* non-const because list head will be modified when registered. */ | |
610 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 611 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd MD |
612 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
613 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)), | |
05ceaafd MD |
614 | }; |
615 | ||
616 | /* | |
882a56d7 | 617 | * Stage 9 of tracepoint event generation. |
05ceaafd | 618 | * |
1c324e59 | 619 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
620 | * |
621 | * Generate the constructor as an externally visible symbol for use when | |
622 | * linking the probe statically. | |
1c324e59 MD |
623 | */ |
624 | ||
625 | /* Reset all macros within TRACEPOINT_EVENT */ | |
626 | #include <lttng/ust-tracepoint-event-reset.h> | |
1c324e59 MD |
627 | static void __attribute__((constructor)) |
628 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) | |
629 | { | |
630 | int ret; | |
631 | ||
632 | ret = ltt_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); | |
633 | assert(!ret); | |
634 | } | |
635 | ||
636 | static void __attribute__((destructor)) | |
637 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) | |
638 | { | |
639 | ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); | |
640 | } | |
628e1d81 MD |
641 | |
642 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |