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0a42beb6 MD |
1 | /* |
2 | * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> | |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * This library is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; | |
8 | * version 2.1 of the License. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
20 | #include <stdio.h> | |
8d8a24c8 | 21 | #include <urcu/compiler.h> |
0a42beb6 | 22 | #include <ust/lttng-events.h> |
8d8a24c8 | 23 | #include <ust/ringbuffer-config.h> |
0a42beb6 MD |
24 | |
25 | /* | |
26 | * Macro declarations used for all stages. | |
27 | */ | |
28 | ||
29 | #undef ctf_integer | |
30 | #define ctf_integer(_type, _item, _src) \ | |
31 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) | |
32 | ||
33 | #undef ctf_integer_hex | |
34 | #define ctf_integer_hex(_type, _item, _src) \ | |
35 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) | |
36 | ||
37 | #undef ctf_integer_network | |
38 | #define ctf_integer_network(_type, _item, _src) \ | |
39 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) | |
40 | ||
41 | #undef ctf_integer_network_hex | |
42 | #define ctf_integer_network_hex(_type, _item, _src) \ | |
43 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) | |
44 | ||
45 | #undef ctf_array | |
46 | #define ctf_array(_type, _item, _src, _length) \ | |
47 | ctf_array_encoded(_type, _item, _src, _length, none) | |
48 | ||
49 | #undef ctf_array_text | |
50 | #define ctf_array_text(_type, _item, _src, _length) \ | |
51 | ctf_array_encoded(_type, _item, _src, _length, UTF8) | |
52 | ||
53 | #undef ctf_sequence | |
54 | #define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ | |
55 | ctf_sequence_encoded(_type, _item, _src, \ | |
56 | _length_type, _src_length, none) | |
57 | ||
58 | #undef ctf_sequence_text | |
59 | #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ | |
60 | ctf_sequence_encoded(_type, _item, _src, \ | |
61 | _length_type, _src_length, UTF8) | |
62 | ||
63 | /* ctf_string is redefined at each step */ | |
64 | ||
65 | /* | |
66 | * TRACEPOINT_EVENT_CLASS can be used to add a generic function handlers | |
67 | * for events. That is, if all events have the same parameters and just | |
68 | * have distinct trace points. Each tracepoint can be defined with | |
69 | * TRACEPOINT_EVENT_INSTANCE and that will map the | |
70 | * TRACEPOINT_EVENT_CLASS to the tracepoint. | |
71 | * | |
72 | * TRACEPOINT_EVENT is a one to one mapping between tracepoint and | |
73 | * template. | |
74 | */ | |
75 | ||
76 | #undef TRACEPOINT_EVENT | |
77 | #define TRACEPOINT_EVENT(name, proto, args, fields) \ | |
78 | TRACEPOINT_EVENT_CLASS(name, \ | |
79 | TP_PARAMS(proto), \ | |
80 | TP_PARAMS(args), \ | |
81 | TP_PARAMS(fields)) \ | |
82 | TRACEPOINT_EVENT_INSTANCE(name, name, TP_PARAMS(proto), TP_PARAMS(args)) | |
83 | ||
8d8a24c8 MD |
84 | #undef TRACEPOINT_EVENT_NOARGS |
85 | #define TRACEPOINT_EVENT_NOARGS(name, fields) \ | |
86 | TRACEPOINT_EVENT_CLASS_NOARGS(name, \ | |
87 | TP_PARAMS(fields)) \ | |
88 | TRACEPOINT_EVENT_INSTANCE_NOARGS(name, name) | |
89 | ||
90 | /* Helpers */ | |
91 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
92 | ||
0a42beb6 MD |
93 | /* |
94 | * Stage 1 of the trace events. | |
95 | * | |
96 | * Create event field type metadata section. | |
97 | * Each event produce an array of fields. | |
98 | */ | |
99 | ||
8d8a24c8 MD |
100 | /* Reset all macros within TRACEPOINT_EVENT */ |
101 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
102 | |
103 | /* Named field types must be defined in lttng-types.h */ | |
104 | ||
105 | #undef ctf_integer_ext | |
106 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
107 | { \ | |
108 | .name = #_item, \ | |
109 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
110 | }, | |
111 | ||
20f1eee7 MD |
112 | #undef ctf_float |
113 | #define ctf_float(_type, _item, _src) \ | |
114 | { \ | |
115 | .name = #_item, \ | |
116 | .type = __type_float(_type), \ | |
117 | }, | |
118 | ||
0a42beb6 MD |
119 | #undef ctf_array_encoded |
120 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
121 | { \ | |
122 | .name = #_item, \ | |
123 | .type = \ | |
124 | { \ | |
125 | .atype = atype_array, \ | |
126 | .u.array = \ | |
127 | { \ | |
128 | .length = _length, \ | |
129 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
130 | }, \ | |
131 | }, \ | |
132 | }, | |
133 | ||
134 | #undef ctf_sequence_encoded | |
135 | #define ctf_sequence_encoded(_type, _item, _src, \ | |
136 | _length_type, _src_length, _encoding) \ | |
137 | { \ | |
138 | .name = #_item, \ | |
139 | .type = \ | |
140 | { \ | |
141 | .atype = atype_sequence, \ | |
142 | .u.sequence = \ | |
143 | { \ | |
144 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
145 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
146 | }, \ | |
147 | }, \ | |
148 | }, | |
149 | ||
150 | #undef ctf_string | |
151 | #define ctf_string(_item, _src) \ | |
152 | { \ | |
153 | .name = #_item, \ | |
154 | .type = \ | |
155 | { \ | |
156 | .atype = atype_string, \ | |
157 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
158 | }, \ | |
159 | }, | |
160 | ||
161 | #undef TP_FIELDS | |
162 | #define TP_FIELDS(args...) args /* Only one used in this phase */ | |
163 | ||
8d8a24c8 MD |
164 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
165 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
0a42beb6 MD |
166 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
167 | _fields \ | |
168 | }; | |
169 | ||
8d8a24c8 MD |
170 | #undef TRACEPOINT_EVENT_CLASS |
171 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
172 | TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) | |
173 | ||
174 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
175 | |
176 | /* | |
177 | * Stage 2 of the trace events. | |
178 | * | |
179 | * Create probe callback prototypes. | |
180 | */ | |
181 | ||
8d8a24c8 MD |
182 | /* Reset all macros within TRACEPOINT_EVENT */ |
183 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
184 | |
185 | #undef TP_PROTO | |
186 | #define TP_PROTO(args...) args | |
187 | ||
188 | #undef TRACEPOINT_EVENT_CLASS | |
8d8a24c8 | 189 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
0a42beb6 MD |
190 | static void __event_probe__##_name(void *__data, _proto); |
191 | ||
8d8a24c8 MD |
192 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
193 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
194 | static void __event_probe__##_name(void *__data); | |
195 | ||
196 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
197 | |
198 | /* | |
199 | * Stage 3 of the trace events. | |
200 | * | |
201 | * Create an array of events. | |
202 | */ | |
203 | ||
204 | /* Named field types must be defined in lttng-types.h */ | |
205 | ||
8d8a24c8 MD |
206 | /* Reset all macros within TRACEPOINT_EVENT */ |
207 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 | 208 | |
8d8a24c8 MD |
209 | #undef TRACEPOINT_EVENT_INSTANCE_NOARGS |
210 | #define TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ | |
0a42beb6 MD |
211 | { \ |
212 | .fields = __event_fields___##_template, \ | |
213 | .name = #_name, \ | |
214 | .probe_callback = (void *) &__event_probe__##_template,\ | |
8d8a24c8 | 215 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_template), \ |
0a42beb6 MD |
216 | }, |
217 | ||
8d8a24c8 MD |
218 | #undef TRACEPOINT_EVENT_INSTANCE |
219 | #define TRACEPOINT_EVENT_INSTANCE(_template, _name, _proto, _args) \ | |
220 | TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) | |
221 | ||
0a42beb6 MD |
222 | #define TP_ID1(_token, _system) _token##_system |
223 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
224 | ||
8d8a24c8 MD |
225 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_SYSTEM)[] = { |
226 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
227 | }; |
228 | ||
229 | #undef TP_ID1 | |
230 | #undef TP_ID | |
231 | ||
232 | ||
233 | /* | |
234 | * Stage 4 of the trace events. | |
235 | * | |
236 | * Create a toplevel descriptor for the whole probe. | |
237 | */ | |
238 | ||
239 | #define TP_ID1(_token, _system) _token##_system | |
240 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
241 | ||
242 | /* non-const because list head will be modified when registered. */ | |
8d8a24c8 MD |
243 | static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_SYSTEM) = { |
244 | .event_desc = TP_ID(__event_desc___, TRACEPOINT_SYSTEM), | |
245 | .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_SYSTEM)), | |
0a42beb6 MD |
246 | }; |
247 | ||
248 | #undef TP_ID1 | |
249 | #undef TP_ID | |
250 | ||
251 | /* | |
252 | * Stage 5 of the trace events. | |
253 | * | |
254 | * Create static inline function that calculates event size. | |
255 | */ | |
256 | ||
8d8a24c8 MD |
257 | /* Reset all macros within TRACEPOINT_EVENT */ |
258 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
259 | |
260 | /* Named field types must be defined in lttng-types.h */ | |
261 | ||
262 | #undef ctf_integer_ext | |
263 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
264 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ | |
265 | __event_len += sizeof(_type); | |
266 | ||
20f1eee7 MD |
267 | #undef ctf_float |
268 | #define ctf_float(_type, _item, _src) \ | |
269 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ | |
270 | __event_len += sizeof(_type); | |
271 | ||
0a42beb6 MD |
272 | #undef ctf_array_encoded |
273 | #define ctf_array_encoded(_type, _item, _src, _length) \ | |
274 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ | |
275 | __event_len += sizeof(_type) * (_length); | |
276 | ||
277 | #undef ctf_sequence_encoded | |
278 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
279 | _src_length, _encoding) \ | |
280 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_length_type)); \ | |
281 | __event_len += sizeof(_length_type); \ | |
282 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ | |
283 | __dynamic_len[__dynamic_len_idx] = (_length); \ | |
284 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
285 | __dynamic_len_idx++; | |
286 | ||
287 | #undef ctf_string | |
288 | #define ctf_string(_item, _src) \ | |
289 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; | |
290 | ||
291 | #undef TP_PROTO | |
292 | #define TP_PROTO(args...) args | |
293 | ||
294 | #undef TP_FIELDS | |
295 | #define TP_FIELDS(args...) args | |
296 | ||
297 | #undef TRACEPOINT_EVENT_CLASS | |
298 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
299 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
300 | { \ | |
301 | size_t __event_len = 0; \ | |
302 | unsigned int __dynamic_len_idx = 0; \ | |
303 | \ | |
304 | if (0) \ | |
305 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
306 | _fields \ | |
307 | return __event_len; \ | |
308 | } | |
309 | ||
8d8a24c8 MD |
310 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
311 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
312 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len) \ | |
313 | { \ | |
314 | size_t __event_len = 0; \ | |
315 | unsigned int __dynamic_len_idx = 0; \ | |
316 | \ | |
317 | if (0) \ | |
318 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
319 | _fields \ | |
320 | return __event_len; \ | |
321 | } | |
322 | ||
323 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
324 | |
325 | /* | |
326 | * Stage 6 of the trace events. | |
327 | * | |
328 | * Create static inline function that calculates event payload alignment. | |
329 | */ | |
330 | ||
8d8a24c8 MD |
331 | /* Reset all macros within TRACEPOINT_EVENT */ |
332 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
333 | |
334 | /* Named field types must be defined in lttng-types.h */ | |
335 | ||
336 | #undef ctf_integer_ext | |
337 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
338 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); | |
339 | ||
20f1eee7 MD |
340 | #undef ctf_float |
341 | #define ctf_float(_type, _item, _src) \ | |
342 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); | |
343 | ||
0a42beb6 MD |
344 | #undef ctf_array_encoded |
345 | #define ctf_array_encoded(_type, _item, _src, _length) \ | |
346 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); | |
347 | ||
348 | #undef ctf_sequence_encoded | |
349 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
350 | _src_length, _encoding) \ | |
351 | __event_align = max_t(size_t, __event_align, ltt_alignof(_length_type)); \ | |
352 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); | |
353 | ||
354 | #undef ctf_string | |
355 | #define ctf_string(_item, _src) | |
356 | ||
357 | #undef TP_PROTO | |
358 | #define TP_PROTO(args...) args | |
359 | ||
360 | #undef TP_FIELDS | |
361 | #define TP_FIELDS(args...) args | |
362 | ||
363 | #undef TRACEPOINT_EVENT_CLASS | |
364 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
365 | static inline size_t __event_get_align__##_name(_proto) \ | |
366 | { \ | |
367 | size_t __event_align = 1; \ | |
368 | _fields \ | |
369 | return __event_align; \ | |
370 | } | |
371 | ||
8d8a24c8 MD |
372 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
373 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
374 | static inline size_t __event_get_align__##_name(void) \ | |
375 | { \ | |
376 | size_t __event_align = 1; \ | |
377 | _fields \ | |
378 | return __event_align; \ | |
379 | } | |
380 | ||
381 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
382 | |
383 | ||
384 | /* | |
385 | * Stage 7 of the trace events. | |
386 | * | |
387 | * Create the probe function : call even size calculation and write event data | |
388 | * into the buffer. | |
389 | * | |
390 | * We use both the field and assignment macros to write the fields in the order | |
391 | * defined in the field declaration. The field declarations control the | |
392 | * execution order, jumping to the appropriate assignment block. | |
393 | */ | |
394 | ||
8d8a24c8 MD |
395 | /* Reset all macros within TRACEPOINT_EVENT */ |
396 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
397 | |
398 | #undef ctf_integer_ext | |
399 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
400 | { \ | |
401 | _type __tmp = (_src); \ | |
402 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \ | |
403 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ | |
404 | } | |
405 | ||
20f1eee7 MD |
406 | #undef ctf_float |
407 | #define ctf_float(_type, _item, _src) \ | |
408 | { \ | |
409 | _type __tmp = (_src); \ | |
410 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \ | |
411 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ | |
412 | } | |
413 | ||
0a42beb6 MD |
414 | #undef ctf_array_encoded |
415 | #define ctf_array_encoded(_type, _item, _src, _length) \ | |
416 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_type)); \ | |
417 | __chan->ops->event_write(&ctx, _src, _length); | |
418 | ||
419 | #undef ctf_sequence_encoded | |
420 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
421 | _src_length, _encoding) \ | |
422 | { \ | |
423 | _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ | |
424 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_length_type)); \ | |
425 | __chan->ops->event_write(&ctx, &__tmpl, sizeof(_length_type)); \ | |
426 | } \ | |
427 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_type)); \ | |
428 | __chan->ops->event_write(&ctx, _src, \ | |
429 | sizeof(_type) * __get_sequence_len(dest)); | |
430 | ||
431 | #undef ctf_string | |
432 | #define ctf_string(_item, _src) \ | |
433 | tp_memcpy(dest, _src, __get_sequence_len(dest)) | |
434 | ||
435 | /* Beware: this get len actually consumes the len value */ | |
436 | #undef __get_sequence_len | |
437 | #define __get_sequence_len(field) __dynamic_len[__dynamic_len_idx++] | |
438 | ||
439 | #undef TP_PROTO | |
440 | #define TP_PROTO(args...) args | |
441 | ||
442 | #undef TP_ARGS | |
443 | #define TP_ARGS(args...) args | |
444 | ||
445 | #undef TP_FIELDS | |
446 | #define TP_FIELDS(args...) args | |
447 | ||
448 | #undef TRACEPOINT_EVENT_CLASS | |
449 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
450 | static void __event_probe__##_name(void *__data, _proto) \ | |
451 | { \ | |
452 | struct ltt_event *__event = __data; \ | |
453 | struct ltt_channel *__chan = __event->chan; \ | |
454 | struct lib_ring_buffer_ctx ctx; \ | |
455 | size_t __event_len, __event_align; \ | |
456 | size_t __dynamic_len_idx = 0; \ | |
8d8a24c8 | 457 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ |
0a42beb6 MD |
458 | int __ret; \ |
459 | \ | |
460 | if (0) \ | |
461 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
8d8a24c8 | 462 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
0a42beb6 | 463 | return; \ |
8d8a24c8 | 464 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
0a42beb6 | 465 | return; \ |
8d8a24c8 | 466 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
0a42beb6 MD |
467 | return; \ |
468 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ | |
469 | __event_align = __event_get_align__##_name(_args); \ | |
470 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, __event, __event_len, \ | |
471 | __event_align, -1); \ | |
472 | __ret = __chan->ops->event_reserve(&ctx, __event->id); \ | |
473 | if (__ret < 0) \ | |
474 | return; \ | |
475 | _fields \ | |
476 | __chan->ops->event_commit(&ctx); \ | |
477 | } | |
478 | ||
8d8a24c8 MD |
479 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
480 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
481 | static void __event_probe__##_name(void *__data) \ | |
482 | { \ | |
483 | struct ltt_event *__event = __data; \ | |
484 | struct ltt_channel *__chan = __event->chan; \ | |
485 | struct lib_ring_buffer_ctx ctx; \ | |
486 | size_t __event_len, __event_align; \ | |
487 | size_t __dynamic_len_idx = 0; \ | |
488 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ | |
489 | int __ret; \ | |
490 | \ | |
491 | if (0) \ | |
492 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
493 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ | |
494 | return; \ | |
495 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
496 | return; \ | |
497 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
498 | return; \ | |
499 | __event_len = __event_get_size__##_name(__dynamic_len); \ | |
500 | __event_align = __event_get_align__##_name(); \ | |
501 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, __event, __event_len, \ | |
502 | __event_align, -1); \ | |
503 | __ret = __chan->ops->event_reserve(&ctx, __event->id); \ | |
504 | if (__ret < 0) \ | |
505 | return; \ | |
506 | _fields \ | |
507 | __chan->ops->event_commit(&ctx); \ | |
508 | } | |
509 | ||
510 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
511 | |
512 | /* | |
513 | * Stage 8 of the trace events. | |
514 | * | |
515 | * Register/unregister probes at module load/unload. | |
516 | */ | |
517 | ||
8d8a24c8 MD |
518 | /* Reset all macros within TRACEPOINT_EVENT */ |
519 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
520 | |
521 | #define TP_ID1(_token, _system) _token##_system | |
522 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
523 | ||
524 | static void __attribute__((constructor)) | |
8d8a24c8 | 525 | TP_ID(__lttng_events_init__, TRACEPOINT_SYSTEM)(void) |
0a42beb6 MD |
526 | { |
527 | int ret; | |
528 | ||
8d8a24c8 | 529 | ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
0a42beb6 MD |
530 | assert(!ret); |
531 | } | |
532 | ||
533 | static void __attribute__((destructor)) | |
8d8a24c8 | 534 | TP_ID(__lttng_events_exit__, TRACEPOINT_SYSTEM)(void) |
0a42beb6 | 535 | { |
8d8a24c8 | 536 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
0a42beb6 MD |
537 | } |
538 | ||
539 | #undef TP_ID1 | |
540 | #undef TP_ID |