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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> |
4318ae1b MD |
22 | #include <lttng/ust-events.h> |
23 | #include <lttng/usterr-signal-safe.h> | |
24 | #include <lttng/ringbuffer-config.h> | |
0a42beb6 MD |
25 | |
26 | /* | |
27 | * Macro declarations used for all stages. | |
28 | */ | |
29 | ||
30 | #undef ctf_integer | |
31 | #define ctf_integer(_type, _item, _src) \ | |
32 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) | |
33 | ||
34 | #undef ctf_integer_hex | |
35 | #define ctf_integer_hex(_type, _item, _src) \ | |
36 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) | |
37 | ||
38 | #undef ctf_integer_network | |
39 | #define ctf_integer_network(_type, _item, _src) \ | |
40 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) | |
41 | ||
42 | #undef ctf_integer_network_hex | |
43 | #define ctf_integer_network_hex(_type, _item, _src) \ | |
44 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) | |
45 | ||
513fc97e MD |
46 | /* ctf_float is redefined at each step */ |
47 | ||
0a42beb6 MD |
48 | #undef ctf_array |
49 | #define ctf_array(_type, _item, _src, _length) \ | |
50 | ctf_array_encoded(_type, _item, _src, _length, none) | |
51 | ||
52 | #undef ctf_array_text | |
53 | #define ctf_array_text(_type, _item, _src, _length) \ | |
54 | ctf_array_encoded(_type, _item, _src, _length, UTF8) | |
55 | ||
56 | #undef ctf_sequence | |
57 | #define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ | |
58 | ctf_sequence_encoded(_type, _item, _src, \ | |
59 | _length_type, _src_length, none) | |
60 | ||
61 | #undef ctf_sequence_text | |
62 | #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ | |
63 | ctf_sequence_encoded(_type, _item, _src, \ | |
64 | _length_type, _src_length, UTF8) | |
65 | ||
66 | /* ctf_string is redefined at each step */ | |
67 | ||
68 | /* | |
69 | * TRACEPOINT_EVENT_CLASS can be used to add a generic function handlers | |
70 | * for events. That is, if all events have the same parameters and just | |
71 | * have distinct trace points. Each tracepoint can be defined with | |
72 | * TRACEPOINT_EVENT_INSTANCE and that will map the | |
73 | * TRACEPOINT_EVENT_CLASS to the tracepoint. | |
74 | * | |
75 | * TRACEPOINT_EVENT is a one to one mapping between tracepoint and | |
76 | * template. | |
77 | */ | |
78 | ||
79 | #undef TRACEPOINT_EVENT | |
7083f0fe MD |
80 | #define TRACEPOINT_EVENT(provider, name, proto, args, fields) \ |
81 | TRACEPOINT_EVENT_CLASS(provider, name, \ | |
0a42beb6 MD |
82 | TP_PARAMS(proto), \ |
83 | TP_PARAMS(args), \ | |
84 | TP_PARAMS(fields)) \ | |
7083f0fe | 85 | TRACEPOINT_EVENT_INSTANCE(provider, name, name, TP_PARAMS(proto), TP_PARAMS(args)) |
0a42beb6 | 86 | |
8d8a24c8 | 87 | #undef TRACEPOINT_EVENT_NOARGS |
7083f0fe MD |
88 | #define TRACEPOINT_EVENT_NOARGS(provider, name, fields) \ |
89 | TRACEPOINT_EVENT_CLASS_NOARGS(provider, name, \ | |
8d8a24c8 | 90 | TP_PARAMS(fields)) \ |
7083f0fe | 91 | TRACEPOINT_EVENT_INSTANCE_NOARGS(provider, name, name) |
8d8a24c8 MD |
92 | |
93 | /* Helpers */ | |
94 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
95 | ||
1dbfff0c MD |
96 | #define _tp_max_t(type, x, y) \ |
97 | ({ \ | |
98 | type __max1 = (x); \ | |
99 | type __max2 = (y); \ | |
100 | __max1 > __max2 ? __max1: __max2; \ | |
101 | }) | |
102 | ||
34a4456d MD |
103 | /* |
104 | * Stage 0 of the trace events. | |
105 | * | |
106 | * Check that each TRACEPOINT_EVENT provider argument match the | |
107 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
108 | */ | |
109 | ||
110 | /* Reset all macros within TRACEPOINT_EVENT */ | |
111 | #include <lttng/ust-tracepoint-event-reset.h> | |
112 | ||
113 | #define TP_ID1(_token, _provider) _token##_provider | |
114 | #define TP_ID(_token, _provider) TP_ID1(_token, _provider) | |
115 | ||
116 | static inline | |
117 | void TP_ID(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
118 | { | |
119 | } | |
120 | ||
121 | #undef TRACEPOINT_EVENT_CLASS | |
122 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ | |
123 | __tracepoint_provider_mismatch_##_provider(); | |
124 | ||
125 | #undef TRACEPOINT_EVENT_CLASS_NOARGS | |
126 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \ | |
127 | __tracepoint_provider_mismatch_##_provider(); | |
128 | ||
129 | #undef TRACEPOINT_EVENT_INSTANCE | |
130 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _proto, _args) \ | |
131 | __tracepoint_provider_mismatch_##_provider(); | |
132 | ||
133 | #undef TRACEPOINT_EVENT_INSTANCE_NOARGS | |
134 | #define TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name) \ | |
135 | __tracepoint_provider_mismatch_##_provider(); | |
136 | ||
137 | static __attribute__((unused)) | |
138 | void TP_ID(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) | |
139 | { | |
140 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
141 | } | |
142 | ||
143 | #undef TP_ID1 | |
144 | #undef TP_ID | |
1dbfff0c | 145 | |
0a42beb6 MD |
146 | /* |
147 | * Stage 1 of the trace events. | |
148 | * | |
149 | * Create event field type metadata section. | |
150 | * Each event produce an array of fields. | |
151 | */ | |
152 | ||
8d8a24c8 | 153 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 154 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 MD |
155 | |
156 | #undef ctf_integer_ext | |
157 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
158 | { \ | |
159 | .name = #_item, \ | |
160 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
161 | }, | |
162 | ||
20f1eee7 MD |
163 | #undef ctf_float |
164 | #define ctf_float(_type, _item, _src) \ | |
165 | { \ | |
166 | .name = #_item, \ | |
167 | .type = __type_float(_type), \ | |
168 | }, | |
169 | ||
0a42beb6 MD |
170 | #undef ctf_array_encoded |
171 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
172 | { \ | |
173 | .name = #_item, \ | |
174 | .type = \ | |
175 | { \ | |
176 | .atype = atype_array, \ | |
177 | .u.array = \ | |
178 | { \ | |
179 | .length = _length, \ | |
180 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
181 | }, \ | |
182 | }, \ | |
183 | }, | |
184 | ||
185 | #undef ctf_sequence_encoded | |
186 | #define ctf_sequence_encoded(_type, _item, _src, \ | |
187 | _length_type, _src_length, _encoding) \ | |
188 | { \ | |
189 | .name = #_item, \ | |
190 | .type = \ | |
191 | { \ | |
192 | .atype = atype_sequence, \ | |
193 | .u.sequence = \ | |
194 | { \ | |
195 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
196 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
197 | }, \ | |
198 | }, \ | |
199 | }, | |
200 | ||
201 | #undef ctf_string | |
202 | #define ctf_string(_item, _src) \ | |
203 | { \ | |
204 | .name = #_item, \ | |
205 | .type = \ | |
206 | { \ | |
207 | .atype = atype_string, \ | |
208 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
209 | }, \ | |
210 | }, | |
211 | ||
212 | #undef TP_FIELDS | |
213 | #define TP_FIELDS(args...) args /* Only one used in this phase */ | |
214 | ||
8d8a24c8 | 215 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
7083f0fe MD |
216 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \ |
217 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
0a42beb6 MD |
218 | _fields \ |
219 | }; | |
220 | ||
8d8a24c8 | 221 | #undef TRACEPOINT_EVENT_CLASS |
7083f0fe MD |
222 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ |
223 | TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, TP_PARAMS(_fields)) | |
8d8a24c8 MD |
224 | |
225 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
226 | |
227 | /* | |
228 | * Stage 2 of the trace events. | |
229 | * | |
230 | * Create probe callback prototypes. | |
231 | */ | |
232 | ||
8d8a24c8 | 233 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 234 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 MD |
235 | |
236 | #undef TP_PROTO | |
237 | #define TP_PROTO(args...) args | |
238 | ||
239 | #undef TRACEPOINT_EVENT_CLASS | |
7083f0fe MD |
240 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ |
241 | static void __event_probe__##_provider##___##_name(void *__data, _proto); | |
0a42beb6 | 242 | |
8d8a24c8 | 243 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
7083f0fe MD |
244 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \ |
245 | static void __event_probe__##_provider##___##_name(void *__data); | |
8d8a24c8 MD |
246 | |
247 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
248 | |
249 | /* | |
250 | * Stage 3 of the trace events. | |
251 | * | |
252 | * Create an array of events. | |
253 | */ | |
254 | ||
8d8a24c8 | 255 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 256 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 | 257 | |
8d8a24c8 | 258 | #undef TRACEPOINT_EVENT_INSTANCE_NOARGS |
7083f0fe | 259 | #define TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name) \ |
0a42beb6 | 260 | { \ |
7083f0fe MD |
261 | .fields = __event_fields___##_provider##___##_template,\ |
262 | .name = #_provider ":" #_name, \ | |
263 | .probe_callback = (void *) &__event_probe__##_provider##___##_template,\ | |
264 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \ | |
0a42beb6 MD |
265 | }, |
266 | ||
8d8a24c8 | 267 | #undef TRACEPOINT_EVENT_INSTANCE |
7083f0fe MD |
268 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _proto, _args) \ |
269 | TRACEPOINT_EVENT_INSTANCE_NOARGS(_provider, _template, _name) | |
8d8a24c8 | 270 | |
a4ada9b8 MD |
271 | #define TP_ID1(_token, _provider) _token##_provider |
272 | #define TP_ID(_token, _provider) TP_ID1(_token, _provider) | |
0a42beb6 | 273 | |
a4ada9b8 | 274 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_PROVIDER)[] = { |
8d8a24c8 | 275 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
0a42beb6 MD |
276 | }; |
277 | ||
278 | #undef TP_ID1 | |
279 | #undef TP_ID | |
280 | ||
281 | ||
282 | /* | |
283 | * Stage 4 of the trace events. | |
284 | * | |
285 | * Create a toplevel descriptor for the whole probe. | |
286 | */ | |
287 | ||
a4ada9b8 MD |
288 | #define TP_ID1(_token, _provider) _token##_provider |
289 | #define TP_ID(_token, _provider) TP_ID1(_token, _provider) | |
0a42beb6 MD |
290 | |
291 | /* non-const because list head will be modified when registered. */ | |
a4ada9b8 MD |
292 | static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_PROVIDER) = { |
293 | .event_desc = TP_ID(__event_desc___, TRACEPOINT_PROVIDER), | |
294 | .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_PROVIDER)), | |
0a42beb6 MD |
295 | }; |
296 | ||
297 | #undef TP_ID1 | |
298 | #undef TP_ID | |
299 | ||
300 | /* | |
301 | * Stage 5 of the trace events. | |
302 | * | |
303 | * Create static inline function that calculates event size. | |
304 | */ | |
305 | ||
8d8a24c8 | 306 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 307 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 MD |
308 | |
309 | #undef ctf_integer_ext | |
310 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
1dbfff0c | 311 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0a42beb6 MD |
312 | __event_len += sizeof(_type); |
313 | ||
20f1eee7 MD |
314 | #undef ctf_float |
315 | #define ctf_float(_type, _item, _src) \ | |
1dbfff0c | 316 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
20f1eee7 MD |
317 | __event_len += sizeof(_type); |
318 | ||
0a42beb6 | 319 | #undef ctf_array_encoded |
41aaf8a5 | 320 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
1dbfff0c | 321 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0a42beb6 MD |
322 | __event_len += sizeof(_type) * (_length); |
323 | ||
324 | #undef ctf_sequence_encoded | |
325 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
326 | _src_length, _encoding) \ | |
1dbfff0c | 327 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
0a42beb6 | 328 | __event_len += sizeof(_length_type); \ |
1dbfff0c | 329 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
5dba5937 | 330 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
0a42beb6 MD |
331 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
332 | __dynamic_len_idx++; | |
333 | ||
334 | #undef ctf_string | |
335 | #define ctf_string(_item, _src) \ | |
336 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; | |
337 | ||
338 | #undef TP_PROTO | |
339 | #define TP_PROTO(args...) args | |
340 | ||
341 | #undef TP_FIELDS | |
342 | #define TP_FIELDS(args...) args | |
343 | ||
344 | #undef TRACEPOINT_EVENT_CLASS | |
7083f0fe MD |
345 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ |
346 | static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _proto) \ | |
0a42beb6 MD |
347 | { \ |
348 | size_t __event_len = 0; \ | |
349 | unsigned int __dynamic_len_idx = 0; \ | |
350 | \ | |
351 | if (0) \ | |
352 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
353 | _fields \ | |
354 | return __event_len; \ | |
355 | } | |
356 | ||
8d8a24c8 | 357 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
0a42beb6 MD |
358 | |
359 | /* | |
360 | * Stage 6 of the trace events. | |
361 | * | |
362 | * Create static inline function that calculates event payload alignment. | |
363 | */ | |
364 | ||
8d8a24c8 | 365 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 366 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 MD |
367 | |
368 | #undef ctf_integer_ext | |
369 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
1dbfff0c | 370 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
0a42beb6 | 371 | |
20f1eee7 MD |
372 | #undef ctf_float |
373 | #define ctf_float(_type, _item, _src) \ | |
1dbfff0c | 374 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
20f1eee7 | 375 | |
0a42beb6 | 376 | #undef ctf_array_encoded |
41aaf8a5 | 377 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
1dbfff0c | 378 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
0a42beb6 MD |
379 | |
380 | #undef ctf_sequence_encoded | |
381 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
382 | _src_length, _encoding) \ | |
1dbfff0c MD |
383 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
384 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
0a42beb6 MD |
385 | |
386 | #undef ctf_string | |
387 | #define ctf_string(_item, _src) | |
388 | ||
389 | #undef TP_PROTO | |
390 | #define TP_PROTO(args...) args | |
391 | ||
392 | #undef TP_FIELDS | |
393 | #define TP_FIELDS(args...) args | |
394 | ||
395 | #undef TRACEPOINT_EVENT_CLASS | |
7083f0fe MD |
396 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ |
397 | static inline size_t __event_get_align__##_provider##___##_name(_proto) \ | |
0a42beb6 MD |
398 | { \ |
399 | size_t __event_align = 1; \ | |
400 | _fields \ | |
401 | return __event_align; \ | |
402 | } | |
403 | ||
8d8a24c8 | 404 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
0a42beb6 MD |
405 | |
406 | ||
407 | /* | |
408 | * Stage 7 of the trace events. | |
409 | * | |
410 | * Create the probe function : call even size calculation and write event data | |
411 | * into the buffer. | |
412 | * | |
413 | * We use both the field and assignment macros to write the fields in the order | |
414 | * defined in the field declaration. The field declarations control the | |
415 | * execution order, jumping to the appropriate assignment block. | |
416 | */ | |
417 | ||
8d8a24c8 | 418 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 419 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 MD |
420 | |
421 | #undef ctf_integer_ext | |
422 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
423 | { \ | |
424 | _type __tmp = (_src); \ | |
b8b77c00 MD |
425 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
426 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
0a42beb6 MD |
427 | } |
428 | ||
20f1eee7 MD |
429 | #undef ctf_float |
430 | #define ctf_float(_type, _item, _src) \ | |
431 | { \ | |
432 | _type __tmp = (_src); \ | |
b8b77c00 MD |
433 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
434 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
20f1eee7 MD |
435 | } |
436 | ||
0a42beb6 | 437 | #undef ctf_array_encoded |
41aaf8a5 | 438 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
b8b77c00 MD |
439 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
440 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
0a42beb6 MD |
441 | |
442 | #undef ctf_sequence_encoded | |
443 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
444 | _src_length, _encoding) \ | |
445 | { \ | |
446 | _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ | |
b8b77c00 MD |
447 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
448 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
0a42beb6 | 449 | } \ |
b8b77c00 MD |
450 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
451 | __chan->ops->event_write(&__ctx, _src, \ | |
5dba5937 | 452 | sizeof(_type) * __get_dynamic_len(dest)); |
0a42beb6 MD |
453 | |
454 | #undef ctf_string | |
455 | #define ctf_string(_item, _src) \ | |
b8b77c00 MD |
456 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
457 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
0a42beb6 MD |
458 | |
459 | /* Beware: this get len actually consumes the len value */ | |
5dba5937 MD |
460 | #undef __get_dynamic_len |
461 | #define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++] | |
0a42beb6 MD |
462 | |
463 | #undef TP_PROTO | |
464 | #define TP_PROTO(args...) args | |
465 | ||
11dfd4ee MD |
466 | #undef TP_VARS |
467 | #define TP_VARS(args...) args | |
0a42beb6 MD |
468 | |
469 | #undef TP_FIELDS | |
470 | #define TP_FIELDS(args...) args | |
471 | ||
472 | #undef TRACEPOINT_EVENT_CLASS | |
7083f0fe MD |
473 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _proto, _args, _fields) \ |
474 | static void __event_probe__##_provider##___##_name(void *__data, _proto) \ | |
0a42beb6 MD |
475 | { \ |
476 | struct ltt_event *__event = __data; \ | |
477 | struct ltt_channel *__chan = __event->chan; \ | |
4cfec15c | 478 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
0a42beb6 MD |
479 | size_t __event_len, __event_align; \ |
480 | size_t __dynamic_len_idx = 0; \ | |
7083f0fe | 481 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \ |
0a42beb6 MD |
482 | int __ret; \ |
483 | \ | |
484 | if (0) \ | |
485 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
b5a3dfa5 | 486 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
0a42beb6 | 487 | return; \ |
b5a3dfa5 | 488 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
0a42beb6 | 489 | return; \ |
b5a3dfa5 | 490 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
0a42beb6 | 491 | return; \ |
7083f0fe MD |
492 | __event_len = __event_get_size__##_provider##___##_name(__dynamic_len, _args); \ |
493 | __event_align = __event_get_align__##_provider##___##_name(_args); \ | |
b8b77c00 | 494 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
1d498196 | 495 | __event_align, -1, __chan->handle); \ |
b8b77c00 | 496 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
0a42beb6 MD |
497 | if (__ret < 0) \ |
498 | return; \ | |
499 | _fields \ | |
b8b77c00 | 500 | __chan->ops->event_commit(&__ctx); \ |
0a42beb6 MD |
501 | } |
502 | ||
8d8a24c8 | 503 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
7083f0fe MD |
504 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_provider, _name, _fields) \ |
505 | static void __event_probe__##_provider##___##_name(void *__data) \ | |
8d8a24c8 MD |
506 | { \ |
507 | struct ltt_event *__event = __data; \ | |
508 | struct ltt_channel *__chan = __event->chan; \ | |
4cfec15c | 509 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
8d8a24c8 | 510 | size_t __event_len, __event_align; \ |
8d8a24c8 MD |
511 | int __ret; \ |
512 | \ | |
b5a3dfa5 | 513 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
8d8a24c8 | 514 | return; \ |
b5a3dfa5 | 515 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
8d8a24c8 | 516 | return; \ |
b5a3dfa5 | 517 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
8d8a24c8 | 518 | return; \ |
4f6ffb56 MD |
519 | __event_len = 0; \ |
520 | __event_align = 1; \ | |
b8b77c00 | 521 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
1d498196 | 522 | __event_align, -1, __chan->handle); \ |
b8b77c00 | 523 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
8d8a24c8 MD |
524 | if (__ret < 0) \ |
525 | return; \ | |
526 | _fields \ | |
b8b77c00 | 527 | __chan->ops->event_commit(&__ctx); \ |
8d8a24c8 MD |
528 | } |
529 | ||
530 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 | 531 | |
5dba5937 MD |
532 | #undef __get_dynamic_len |
533 | ||
0a42beb6 MD |
534 | /* |
535 | * Stage 8 of the trace events. | |
536 | * | |
537 | * Register/unregister probes at module load/unload. | |
538 | */ | |
539 | ||
8d8a24c8 | 540 | /* Reset all macros within TRACEPOINT_EVENT */ |
4318ae1b | 541 | #include <lttng/ust-tracepoint-event-reset.h> |
0a42beb6 | 542 | |
a4ada9b8 MD |
543 | #define TP_ID1(_token, _provider) _token##_provider |
544 | #define TP_ID(_token, _provider) TP_ID1(_token, _provider) | |
0a42beb6 MD |
545 | |
546 | static void __attribute__((constructor)) | |
a4ada9b8 | 547 | TP_ID(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
0a42beb6 MD |
548 | { |
549 | int ret; | |
550 | ||
a4ada9b8 | 551 | ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_PROVIDER)); |
0a42beb6 MD |
552 | assert(!ret); |
553 | } | |
554 | ||
555 | static void __attribute__((destructor)) | |
a4ada9b8 | 556 | TP_ID(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
0a42beb6 | 557 | { |
a4ada9b8 | 558 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_PROVIDER)); |
0a42beb6 MD |
559 | } |
560 | ||
561 | #undef TP_ID1 | |
562 | #undef TP_ID |