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