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