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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 | ||
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 | |
80 | #define TRACEPOINT_EVENT(name, proto, args, fields) \ | |
81 | TRACEPOINT_EVENT_CLASS(name, \ | |
82 | TP_PARAMS(proto), \ | |
83 | TP_PARAMS(args), \ | |
84 | TP_PARAMS(fields)) \ | |
85 | TRACEPOINT_EVENT_INSTANCE(name, name, TP_PARAMS(proto), TP_PARAMS(args)) | |
86 | ||
8d8a24c8 MD |
87 | #undef TRACEPOINT_EVENT_NOARGS |
88 | #define TRACEPOINT_EVENT_NOARGS(name, fields) \ | |
89 | TRACEPOINT_EVENT_CLASS_NOARGS(name, \ | |
90 | TP_PARAMS(fields)) \ | |
91 | TRACEPOINT_EVENT_INSTANCE_NOARGS(name, name) | |
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 | ||
103 | ||
0a42beb6 MD |
104 | /* |
105 | * Stage 1 of the trace events. | |
106 | * | |
107 | * Create event field type metadata section. | |
108 | * Each event produce an array of fields. | |
109 | */ | |
110 | ||
8d8a24c8 MD |
111 | /* Reset all macros within TRACEPOINT_EVENT */ |
112 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
113 | |
114 | /* Named field types must be defined in lttng-types.h */ | |
115 | ||
116 | #undef ctf_integer_ext | |
117 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
118 | { \ | |
119 | .name = #_item, \ | |
120 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
121 | }, | |
122 | ||
20f1eee7 MD |
123 | #undef ctf_float |
124 | #define ctf_float(_type, _item, _src) \ | |
125 | { \ | |
126 | .name = #_item, \ | |
127 | .type = __type_float(_type), \ | |
128 | }, | |
129 | ||
0a42beb6 MD |
130 | #undef ctf_array_encoded |
131 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ | |
132 | { \ | |
133 | .name = #_item, \ | |
134 | .type = \ | |
135 | { \ | |
136 | .atype = atype_array, \ | |
137 | .u.array = \ | |
138 | { \ | |
139 | .length = _length, \ | |
140 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
141 | }, \ | |
142 | }, \ | |
143 | }, | |
144 | ||
145 | #undef ctf_sequence_encoded | |
146 | #define ctf_sequence_encoded(_type, _item, _src, \ | |
147 | _length_type, _src_length, _encoding) \ | |
148 | { \ | |
149 | .name = #_item, \ | |
150 | .type = \ | |
151 | { \ | |
152 | .atype = atype_sequence, \ | |
153 | .u.sequence = \ | |
154 | { \ | |
155 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
156 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
157 | }, \ | |
158 | }, \ | |
159 | }, | |
160 | ||
161 | #undef ctf_string | |
162 | #define ctf_string(_item, _src) \ | |
163 | { \ | |
164 | .name = #_item, \ | |
165 | .type = \ | |
166 | { \ | |
167 | .atype = atype_string, \ | |
168 | .u.basic.string.encoding = lttng_encode_UTF8, \ | |
169 | }, \ | |
170 | }, | |
171 | ||
172 | #undef TP_FIELDS | |
173 | #define TP_FIELDS(args...) args /* Only one used in this phase */ | |
174 | ||
8d8a24c8 MD |
175 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
176 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
0a42beb6 MD |
177 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
178 | _fields \ | |
179 | }; | |
180 | ||
8d8a24c8 MD |
181 | #undef TRACEPOINT_EVENT_CLASS |
182 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
1dbfff0c | 183 | TRACEPOINT_EVENT_CLASS_NOARGS(_name, TP_PARAMS(_fields)) |
8d8a24c8 MD |
184 | |
185 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
186 | |
187 | /* | |
188 | * Stage 2 of the trace events. | |
189 | * | |
190 | * Create probe callback prototypes. | |
191 | */ | |
192 | ||
8d8a24c8 MD |
193 | /* Reset all macros within TRACEPOINT_EVENT */ |
194 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
195 | |
196 | #undef TP_PROTO | |
197 | #define TP_PROTO(args...) args | |
198 | ||
199 | #undef TRACEPOINT_EVENT_CLASS | |
8d8a24c8 | 200 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
0a42beb6 MD |
201 | static void __event_probe__##_name(void *__data, _proto); |
202 | ||
8d8a24c8 MD |
203 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
204 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
205 | static void __event_probe__##_name(void *__data); | |
206 | ||
207 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
208 | |
209 | /* | |
210 | * Stage 3 of the trace events. | |
211 | * | |
212 | * Create an array of events. | |
213 | */ | |
214 | ||
215 | /* Named field types must be defined in lttng-types.h */ | |
216 | ||
8d8a24c8 MD |
217 | /* Reset all macros within TRACEPOINT_EVENT */ |
218 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 | 219 | |
8d8a24c8 MD |
220 | #undef TRACEPOINT_EVENT_INSTANCE_NOARGS |
221 | #define TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ | |
0a42beb6 MD |
222 | { \ |
223 | .fields = __event_fields___##_template, \ | |
224 | .name = #_name, \ | |
225 | .probe_callback = (void *) &__event_probe__##_template,\ | |
8d8a24c8 | 226 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_template), \ |
0a42beb6 MD |
227 | }, |
228 | ||
8d8a24c8 MD |
229 | #undef TRACEPOINT_EVENT_INSTANCE |
230 | #define TRACEPOINT_EVENT_INSTANCE(_template, _name, _proto, _args) \ | |
231 | TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) | |
232 | ||
0a42beb6 MD |
233 | #define TP_ID1(_token, _system) _token##_system |
234 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
235 | ||
8d8a24c8 MD |
236 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_SYSTEM)[] = { |
237 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 MD |
238 | }; |
239 | ||
240 | #undef TP_ID1 | |
241 | #undef TP_ID | |
242 | ||
243 | ||
244 | /* | |
245 | * Stage 4 of the trace events. | |
246 | * | |
247 | * Create a toplevel descriptor for the whole probe. | |
248 | */ | |
249 | ||
250 | #define TP_ID1(_token, _system) _token##_system | |
251 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
252 | ||
253 | /* non-const because list head will be modified when registered. */ | |
8d8a24c8 MD |
254 | static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_SYSTEM) = { |
255 | .event_desc = TP_ID(__event_desc___, TRACEPOINT_SYSTEM), | |
256 | .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_SYSTEM)), | |
0a42beb6 MD |
257 | }; |
258 | ||
259 | #undef TP_ID1 | |
260 | #undef TP_ID | |
261 | ||
262 | /* | |
263 | * Stage 5 of the trace events. | |
264 | * | |
265 | * Create static inline function that calculates event size. | |
266 | */ | |
267 | ||
8d8a24c8 MD |
268 | /* Reset all macros within TRACEPOINT_EVENT */ |
269 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
270 | |
271 | /* Named field types must be defined in lttng-types.h */ | |
272 | ||
273 | #undef ctf_integer_ext | |
274 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
1dbfff0c | 275 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0a42beb6 MD |
276 | __event_len += sizeof(_type); |
277 | ||
20f1eee7 MD |
278 | #undef ctf_float |
279 | #define ctf_float(_type, _item, _src) \ | |
1dbfff0c | 280 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
20f1eee7 MD |
281 | __event_len += sizeof(_type); |
282 | ||
0a42beb6 | 283 | #undef ctf_array_encoded |
41aaf8a5 | 284 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
1dbfff0c | 285 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0a42beb6 MD |
286 | __event_len += sizeof(_type) * (_length); |
287 | ||
288 | #undef ctf_sequence_encoded | |
289 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
290 | _src_length, _encoding) \ | |
1dbfff0c | 291 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
0a42beb6 | 292 | __event_len += sizeof(_length_type); \ |
1dbfff0c | 293 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
5dba5937 | 294 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
0a42beb6 MD |
295 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
296 | __dynamic_len_idx++; | |
297 | ||
298 | #undef ctf_string | |
299 | #define ctf_string(_item, _src) \ | |
300 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; | |
301 | ||
302 | #undef TP_PROTO | |
303 | #define TP_PROTO(args...) args | |
304 | ||
305 | #undef TP_FIELDS | |
306 | #define TP_FIELDS(args...) args | |
307 | ||
308 | #undef TRACEPOINT_EVENT_CLASS | |
309 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
310 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
311 | { \ | |
312 | size_t __event_len = 0; \ | |
313 | unsigned int __dynamic_len_idx = 0; \ | |
314 | \ | |
315 | if (0) \ | |
316 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
317 | _fields \ | |
318 | return __event_len; \ | |
319 | } | |
320 | ||
8d8a24c8 | 321 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
0a42beb6 MD |
322 | |
323 | /* | |
324 | * Stage 6 of the trace events. | |
325 | * | |
326 | * Create static inline function that calculates event payload alignment. | |
327 | */ | |
328 | ||
8d8a24c8 MD |
329 | /* Reset all macros within TRACEPOINT_EVENT */ |
330 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
331 | |
332 | /* Named field types must be defined in lttng-types.h */ | |
333 | ||
334 | #undef ctf_integer_ext | |
335 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
1dbfff0c | 336 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
0a42beb6 | 337 | |
20f1eee7 MD |
338 | #undef ctf_float |
339 | #define ctf_float(_type, _item, _src) \ | |
1dbfff0c | 340 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
20f1eee7 | 341 | |
0a42beb6 | 342 | #undef ctf_array_encoded |
41aaf8a5 | 343 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
1dbfff0c | 344 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
0a42beb6 MD |
345 | |
346 | #undef ctf_sequence_encoded | |
347 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
348 | _src_length, _encoding) \ | |
1dbfff0c MD |
349 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
350 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
0a42beb6 MD |
351 | |
352 | #undef ctf_string | |
353 | #define ctf_string(_item, _src) | |
354 | ||
355 | #undef TP_PROTO | |
356 | #define TP_PROTO(args...) args | |
357 | ||
358 | #undef TP_FIELDS | |
359 | #define TP_FIELDS(args...) args | |
360 | ||
361 | #undef TRACEPOINT_EVENT_CLASS | |
362 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
363 | static inline size_t __event_get_align__##_name(_proto) \ | |
364 | { \ | |
365 | size_t __event_align = 1; \ | |
366 | _fields \ | |
367 | return __event_align; \ | |
368 | } | |
369 | ||
8d8a24c8 | 370 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
0a42beb6 MD |
371 | |
372 | ||
373 | /* | |
374 | * Stage 7 of the trace events. | |
375 | * | |
376 | * Create the probe function : call even size calculation and write event data | |
377 | * into the buffer. | |
378 | * | |
379 | * We use both the field and assignment macros to write the fields in the order | |
380 | * defined in the field declaration. The field declarations control the | |
381 | * execution order, jumping to the appropriate assignment block. | |
382 | */ | |
383 | ||
8d8a24c8 MD |
384 | /* Reset all macros within TRACEPOINT_EVENT */ |
385 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
386 | |
387 | #undef ctf_integer_ext | |
388 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ | |
389 | { \ | |
390 | _type __tmp = (_src); \ | |
b8b77c00 MD |
391 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
392 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
0a42beb6 MD |
393 | } |
394 | ||
20f1eee7 MD |
395 | #undef ctf_float |
396 | #define ctf_float(_type, _item, _src) \ | |
397 | { \ | |
398 | _type __tmp = (_src); \ | |
b8b77c00 MD |
399 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
400 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
20f1eee7 MD |
401 | } |
402 | ||
0a42beb6 | 403 | #undef ctf_array_encoded |
41aaf8a5 | 404 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
b8b77c00 MD |
405 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
406 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
0a42beb6 MD |
407 | |
408 | #undef ctf_sequence_encoded | |
409 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
410 | _src_length, _encoding) \ | |
411 | { \ | |
412 | _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ | |
b8b77c00 MD |
413 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
414 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
0a42beb6 | 415 | } \ |
b8b77c00 MD |
416 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
417 | __chan->ops->event_write(&__ctx, _src, \ | |
5dba5937 | 418 | sizeof(_type) * __get_dynamic_len(dest)); |
0a42beb6 MD |
419 | |
420 | #undef ctf_string | |
421 | #define ctf_string(_item, _src) \ | |
b8b77c00 MD |
422 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
423 | __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); | |
0a42beb6 MD |
424 | |
425 | /* Beware: this get len actually consumes the len value */ | |
5dba5937 MD |
426 | #undef __get_dynamic_len |
427 | #define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++] | |
0a42beb6 MD |
428 | |
429 | #undef TP_PROTO | |
430 | #define TP_PROTO(args...) args | |
431 | ||
432 | #undef TP_ARGS | |
433 | #define TP_ARGS(args...) args | |
434 | ||
435 | #undef TP_FIELDS | |
436 | #define TP_FIELDS(args...) args | |
437 | ||
438 | #undef TRACEPOINT_EVENT_CLASS | |
439 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ | |
440 | static void __event_probe__##_name(void *__data, _proto) \ | |
441 | { \ | |
442 | struct ltt_event *__event = __data; \ | |
443 | struct ltt_channel *__chan = __event->chan; \ | |
b8b77c00 | 444 | struct lib_ring_buffer_ctx __ctx; \ |
0a42beb6 MD |
445 | size_t __event_len, __event_align; \ |
446 | size_t __dynamic_len_idx = 0; \ | |
8d8a24c8 | 447 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ |
0a42beb6 MD |
448 | int __ret; \ |
449 | \ | |
450 | if (0) \ | |
451 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
8d8a24c8 | 452 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
0a42beb6 | 453 | return; \ |
8d8a24c8 | 454 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
0a42beb6 | 455 | return; \ |
8d8a24c8 | 456 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
0a42beb6 MD |
457 | return; \ |
458 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ | |
459 | __event_align = __event_get_align__##_name(_args); \ | |
b8b77c00 | 460 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
1d498196 | 461 | __event_align, -1, __chan->handle); \ |
b8b77c00 | 462 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
0a42beb6 MD |
463 | if (__ret < 0) \ |
464 | return; \ | |
465 | _fields \ | |
b8b77c00 | 466 | __chan->ops->event_commit(&__ctx); \ |
0a42beb6 MD |
467 | } |
468 | ||
8d8a24c8 MD |
469 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
470 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ | |
471 | static void __event_probe__##_name(void *__data) \ | |
472 | { \ | |
473 | struct ltt_event *__event = __data; \ | |
474 | struct ltt_channel *__chan = __event->chan; \ | |
b8b77c00 | 475 | struct lib_ring_buffer_ctx __ctx; \ |
8d8a24c8 | 476 | size_t __event_len, __event_align; \ |
8d8a24c8 MD |
477 | int __ret; \ |
478 | \ | |
8d8a24c8 MD |
479 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
480 | return; \ | |
481 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
482 | return; \ | |
483 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
484 | return; \ | |
4f6ffb56 MD |
485 | __event_len = 0; \ |
486 | __event_align = 1; \ | |
b8b77c00 | 487 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
1d498196 | 488 | __event_align, -1, __chan->handle); \ |
b8b77c00 | 489 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
8d8a24c8 MD |
490 | if (__ret < 0) \ |
491 | return; \ | |
492 | _fields \ | |
b8b77c00 | 493 | __chan->ops->event_commit(&__ctx); \ |
8d8a24c8 MD |
494 | } |
495 | ||
496 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) | |
0a42beb6 | 497 | |
5dba5937 MD |
498 | #undef __get_dynamic_len |
499 | ||
0a42beb6 MD |
500 | /* |
501 | * Stage 8 of the trace events. | |
502 | * | |
503 | * Register/unregister probes at module load/unload. | |
504 | */ | |
505 | ||
8d8a24c8 MD |
506 | /* Reset all macros within TRACEPOINT_EVENT */ |
507 | #include <ust/lttng-tracepoint-event-reset.h> | |
0a42beb6 MD |
508 | |
509 | #define TP_ID1(_token, _system) _token##_system | |
510 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
511 | ||
512 | static void __attribute__((constructor)) | |
8d8a24c8 | 513 | TP_ID(__lttng_events_init__, TRACEPOINT_SYSTEM)(void) |
0a42beb6 MD |
514 | { |
515 | int ret; | |
516 | ||
8d8a24c8 | 517 | ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
0a42beb6 MD |
518 | assert(!ret); |
519 | } | |
520 | ||
521 | static void __attribute__((destructor)) | |
8d8a24c8 | 522 | TP_ID(__lttng_events_exit__, TRACEPOINT_SYSTEM)(void) |
0a42beb6 | 523 | { |
8d8a24c8 | 524 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
0a42beb6 MD |
525 | } |
526 | ||
527 | #undef TP_ID1 | |
528 | #undef TP_ID |