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. | |
d2428e87 MD |
13 | * |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
1c324e59 MD |
21 | */ |
22 | ||
23 | #include <stdio.h> | |
7d381d6e | 24 | #include <stdlib.h> |
1c324e59 | 25 | #include <urcu/compiler.h> |
f488575f | 26 | #include <urcu/rculist.h> |
1c324e59 | 27 | #include <lttng/ust-events.h> |
1c324e59 | 28 | #include <lttng/ringbuffer-config.h> |
a8909ba5 | 29 | #include <lttng/ust-compiler.h> |
000b8662 | 30 | #include <lttng/tracepoint.h> |
7018d9d4 | 31 | #include <byteswap.h> |
44c72f10 | 32 | #include <string.h> |
1c324e59 | 33 | |
24a39530 PP |
34 | #define __LTTNG_UST_NULL_STRING "(null)" |
35 | ||
000b8662 MD |
36 | #undef tp_list_for_each_entry_rcu |
37 | #define tp_list_for_each_entry_rcu(pos, head, member) \ | |
38 | for (pos = cds_list_entry(tp_rcu_dereference_bp((head)->next), __typeof__(*pos), member); \ | |
39 | &pos->member != (head); \ | |
40 | pos = cds_list_entry(tp_rcu_dereference_bp(pos->member.next), __typeof__(*pos), member)) | |
41 | ||
1c324e59 MD |
42 | /* |
43 | * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the | |
44 | * same arguments and having the same field layout. | |
45 | * | |
46 | * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with | |
47 | * its own provider and name. It refers to a class (template). | |
48 | * | |
49 | * TRACEPOINT_EVENT declared both a class and an instance and does a | |
50 | * direct mapping from the instance to the class. | |
51 | */ | |
52 | ||
53 | #undef TRACEPOINT_EVENT | |
54 | #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ | |
55 | TRACEPOINT_EVENT_CLASS(_provider, _name, \ | |
56 | _TP_PARAMS(_args), \ | |
57 | _TP_PARAMS(_fields)) \ | |
58 | TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ | |
68755429 | 59 | _TP_PARAMS(_args)) |
1c324e59 MD |
60 | |
61 | /* Helpers */ | |
62 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
63 | ||
64 | #define _tp_max_t(type, x, y) \ | |
65 | ({ \ | |
66 | type __max1 = (x); \ | |
67 | type __max2 = (y); \ | |
68 | __max1 > __max2 ? __max1: __max2; \ | |
69 | }) | |
70 | ||
71 | /* | |
72 | * Stage 0 of tracepoint event generation. | |
73 | * | |
74 | * Check that each TRACEPOINT_EVENT provider argument match the | |
75 | * TRACEPOINT_PROVIDER by creating dummy callbacks. | |
76 | */ | |
77 | ||
78 | /* Reset all macros within TRACEPOINT_EVENT */ | |
79 | #include <lttng/ust-tracepoint-event-reset.h> | |
80 | ||
7ce6b21d PW |
81 | static inline lttng_ust_notrace |
82 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void); | |
1c324e59 MD |
83 | static inline |
84 | void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void) | |
85 | { | |
86 | } | |
87 | ||
88 | #undef TRACEPOINT_EVENT_CLASS | |
89 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
90 | __tracepoint_provider_mismatch_##_provider(); | |
91 | ||
92 | #undef TRACEPOINT_EVENT_INSTANCE | |
93 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
94 | __tracepoint_provider_mismatch_##_provider(); | |
95 | ||
7ce6b21d PW |
96 | static inline lttng_ust_notrace |
97 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void); | |
e8bd1da7 | 98 | static inline |
1c324e59 MD |
99 | void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void) |
100 | { | |
101 | #include TRACEPOINT_INCLUDE | |
102 | } | |
103 | ||
f56cd1d5 MD |
104 | /* |
105 | * Stage 0.1 of tracepoint event generation. | |
106 | * | |
107 | * Check that each TRACEPOINT_EVENT provider:name does not exceed the | |
108 | * tracepoint name length limit. | |
109 | */ | |
110 | ||
111 | /* Reset all macros within TRACEPOINT_EVENT */ | |
112 | #include <lttng/ust-tracepoint-event-reset.h> | |
113 | ||
114 | #undef TRACEPOINT_EVENT_INSTANCE | |
115 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
116 | static const char \ | |
117 | __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \ | |
118 | __attribute__((unused)) = \ | |
119 | #_provider ":" #_name; | |
120 | ||
121 | #include TRACEPOINT_INCLUDE | |
122 | ||
c785c634 MD |
123 | /* |
124 | * Stage 0.9 of tracepoint event generation | |
125 | * | |
126 | * Unfolding the enums | |
127 | */ | |
128 | #include <lttng/ust-tracepoint-event-reset.h> | |
129 | ||
130 | /* Enumeration entry (single value) */ | |
131 | #undef ctf_enum_value | |
132 | #define ctf_enum_value(_string, _value) \ | |
16940765 MD |
133 | { \ |
134 | .start = { \ | |
16940765 MD |
135 | .value = lttng_is_signed_type(__typeof__(_value)) ? \ |
136 | (long long) (_value) : (_value), \ | |
73d2b7cb | 137 | .signedness = lttng_is_signed_type(__typeof__(_value)), \ |
16940765 MD |
138 | }, \ |
139 | .end = { \ | |
16940765 MD |
140 | .value = lttng_is_signed_type(__typeof__(_value)) ? \ |
141 | (long long) (_value) : (_value), \ | |
73d2b7cb | 142 | .signedness = lttng_is_signed_type(__typeof__(_value)), \ |
16940765 MD |
143 | }, \ |
144 | .string = (_string), \ | |
145 | }, | |
c785c634 MD |
146 | |
147 | /* Enumeration entry (range) */ | |
148 | #undef ctf_enum_range | |
149 | #define ctf_enum_range(_string, _range_start, _range_end) \ | |
16940765 MD |
150 | { \ |
151 | .start = { \ | |
16940765 MD |
152 | .value = lttng_is_signed_type(__typeof__(_range_start)) ? \ |
153 | (long long) (_range_start) : (_range_start), \ | |
73d2b7cb | 154 | .signedness = lttng_is_signed_type(__typeof__(_range_start)), \ |
16940765 MD |
155 | }, \ |
156 | .end = { \ | |
16940765 MD |
157 | .value = lttng_is_signed_type(__typeof__(_range_end)) ? \ |
158 | (long long) (_range_end) : (_range_end), \ | |
73d2b7cb | 159 | .signedness = lttng_is_signed_type(__typeof__(_range_end)), \ |
16940765 MD |
160 | }, \ |
161 | .string = (_string), \ | |
162 | }, | |
c785c634 MD |
163 | |
164 | #undef TP_ENUM_VALUES | |
165 | #define TP_ENUM_VALUES(...) \ | |
166 | __VA_ARGS__ | |
167 | ||
168 | #undef TRACEPOINT_ENUM | |
169 | #define TRACEPOINT_ENUM(_provider, _name, _values) \ | |
170 | const struct lttng_enum_entry __enum_values__##_provider##_##_name[] = { \ | |
171 | _values \ | |
792310b7 | 172 | ctf_enum_value("", 0) /* Dummy, 0-len array forbidden by C99. */ \ |
c785c634 MD |
173 | }; |
174 | ||
175 | #include TRACEPOINT_INCLUDE | |
176 | ||
1c324e59 MD |
177 | /* |
178 | * Stage 1 of tracepoint event generation. | |
179 | * | |
180 | * Create event field type metadata section. | |
181 | * Each event produce an array of fields. | |
182 | */ | |
183 | ||
184 | /* Reset all macros within TRACEPOINT_EVENT */ | |
185 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
186 | #include <lttng/ust-tracepoint-event-write.h> |
187 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1c324e59 | 188 | |
4774c8f3 | 189 | #undef _ctf_integer_ext |
180901e6 | 190 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
191 | { \ |
192 | .name = #_item, \ | |
193 | .type = __type_integer(_type, _byte_order, _base, none),\ | |
180901e6 | 194 | .nowrite = _nowrite, \ |
1c324e59 MD |
195 | }, |
196 | ||
4774c8f3 | 197 | #undef _ctf_float |
180901e6 | 198 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
199 | { \ |
200 | .name = #_item, \ | |
201 | .type = __type_float(_type), \ | |
180901e6 | 202 | .nowrite = _nowrite, \ |
1c324e59 MD |
203 | }, |
204 | ||
4774c8f3 | 205 | #undef _ctf_array_encoded |
180901e6 | 206 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
207 | { \ |
208 | .name = #_item, \ | |
209 | .type = \ | |
210 | { \ | |
211 | .atype = atype_array, \ | |
46d52200 | 212 | .u = \ |
1c324e59 | 213 | { \ |
46d52200 ZT |
214 | .array = \ |
215 | { \ | |
216 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ | |
217 | .length = _length, \ | |
218 | } \ | |
219 | } \ | |
1c324e59 | 220 | }, \ |
180901e6 | 221 | .nowrite = _nowrite, \ |
1c324e59 MD |
222 | }, |
223 | ||
4774c8f3 | 224 | #undef _ctf_sequence_encoded |
f968510a PP |
225 | #define _ctf_sequence_encoded(_type, _item, _src, \ |
226 | _length_type, _src_length, _encoding, _nowrite, \ | |
227 | _elem_type_base) \ | |
1c324e59 MD |
228 | { \ |
229 | .name = #_item, \ | |
230 | .type = \ | |
231 | { \ | |
232 | .atype = atype_sequence, \ | |
46d52200 | 233 | .u = \ |
1c324e59 | 234 | { \ |
46d52200 ZT |
235 | .sequence = \ |
236 | { \ | |
237 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ | |
f968510a | 238 | .elem_type = __type_integer(_type, BYTE_ORDER, _elem_type_base, _encoding), \ |
46d52200 | 239 | }, \ |
1c324e59 MD |
240 | }, \ |
241 | }, \ | |
180901e6 | 242 | .nowrite = _nowrite, \ |
1c324e59 MD |
243 | }, |
244 | ||
4774c8f3 | 245 | #undef _ctf_string |
180901e6 | 246 | #define _ctf_string(_item, _src, _nowrite) \ |
1c324e59 MD |
247 | { \ |
248 | .name = #_item, \ | |
249 | .type = \ | |
250 | { \ | |
251 | .atype = atype_string, \ | |
46d52200 ZT |
252 | .u = \ |
253 | { \ | |
254 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
255 | }, \ | |
1c324e59 | 256 | }, \ |
180901e6 | 257 | .nowrite = _nowrite, \ |
1c324e59 MD |
258 | }, |
259 | ||
c785c634 MD |
260 | #undef _ctf_enum |
261 | #define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \ | |
262 | { \ | |
263 | .name = #_item, \ | |
264 | .type = { \ | |
265 | .atype = atype_enum, \ | |
266 | .u = { \ | |
267 | .basic = { \ | |
268 | .enumeration = { \ | |
269 | .desc = &__enum_##_provider##_##_name, \ | |
270 | .container_type = { \ | |
271 | .size = sizeof(_type) * CHAR_BIT, \ | |
272 | .alignment = lttng_alignof(_type) * CHAR_BIT, \ | |
273 | .signedness = lttng_is_signed_type(_type), \ | |
274 | .reverse_byte_order = 0, \ | |
275 | .base = 10, \ | |
276 | .encoding = lttng_encode_none, \ | |
277 | }, \ | |
278 | }, \ | |
279 | }, \ | |
280 | }, \ | |
281 | }, \ | |
282 | .nowrite = _nowrite, \ | |
283 | }, | |
284 | ||
1c324e59 | 285 | #undef TP_FIELDS |
2eda209b | 286 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
1c324e59 MD |
287 | |
288 | #undef TRACEPOINT_EVENT_CLASS | |
289 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
290 | static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \ | |
291 | _fields \ | |
792310b7 | 292 | ctf_integer(int, dummy, 0) /* Dummy, C99 forbids 0-len array. */ \ |
1c324e59 MD |
293 | }; |
294 | ||
c785c634 MD |
295 | #undef TRACEPOINT_ENUM |
296 | #define TRACEPOINT_ENUM(_provider, _name, _values) \ | |
297 | static const struct lttng_enum_desc __enum_##_provider##_##_name = { \ | |
298 | .name = #_provider "_" #_name, \ | |
299 | .entries = __enum_values__##_provider##_##_name, \ | |
792310b7 | 300 | .nr_entries = _TP_ARRAY_SIZE(__enum_values__##_provider##_##_name) - 1, \ |
c785c634 MD |
301 | }; |
302 | ||
1c324e59 MD |
303 | #include TRACEPOINT_INCLUDE |
304 | ||
305 | /* | |
306 | * Stage 2 of tracepoint event generation. | |
307 | * | |
308 | * Create probe callback prototypes. | |
309 | */ | |
310 | ||
311 | /* Reset all macros within TRACEPOINT_EVENT */ | |
312 | #include <lttng/ust-tracepoint-event-reset.h> | |
313 | ||
314 | #undef TP_ARGS | |
2eda209b | 315 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
316 | |
317 | #undef TRACEPOINT_EVENT_CLASS | |
318 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
319 | static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); | |
320 | ||
321 | #include TRACEPOINT_INCLUDE | |
322 | ||
323 | /* | |
c785c634 | 324 | * Stage 3.0 of tracepoint event generation. |
1c324e59 | 325 | * |
1c324e59 MD |
326 | * Create static inline function that calculates event size. |
327 | */ | |
328 | ||
329 | /* Reset all macros within TRACEPOINT_EVENT */ | |
330 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 331 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 332 | |
4774c8f3 | 333 | #undef _ctf_integer_ext |
180901e6 | 334 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
335 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
336 | __event_len += sizeof(_type); | |
337 | ||
4774c8f3 | 338 | #undef _ctf_float |
180901e6 | 339 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
340 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
341 | __event_len += sizeof(_type); | |
342 | ||
4774c8f3 | 343 | #undef _ctf_array_encoded |
180901e6 | 344 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
345 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
346 | __event_len += sizeof(_type) * (_length); | |
347 | ||
4774c8f3 | 348 | #undef _ctf_sequence_encoded |
f968510a PP |
349 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
350 | _src_length, _encoding, _nowrite, _elem_type_base) \ | |
1c324e59 MD |
351 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
352 | __event_len += sizeof(_length_type); \ | |
353 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ | |
354 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ | |
355 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
356 | __dynamic_len_idx++; | |
357 | ||
4774c8f3 | 358 | #undef _ctf_string |
180901e6 | 359 | #define _ctf_string(_item, _src, _nowrite) \ |
24a39530 PP |
360 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ |
361 | strlen((_src) ? (_src) : __LTTNG_UST_NULL_STRING) + 1; | |
1c324e59 | 362 | |
c785c634 MD |
363 | #undef _ctf_enum |
364 | #define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \ | |
365 | _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite) | |
366 | ||
1c324e59 | 367 | #undef TP_ARGS |
2eda209b | 368 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
369 | |
370 | #undef TP_FIELDS | |
2eda209b | 371 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
372 | |
373 | #undef TRACEPOINT_EVENT_CLASS | |
a8909ba5 PW |
374 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ |
375 | static inline lttng_ust_notrace \ | |
376 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \ | |
377 | static inline \ | |
378 | size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 MD |
379 | { \ |
380 | size_t __event_len = 0; \ | |
381 | unsigned int __dynamic_len_idx = 0; \ | |
382 | \ | |
383 | if (0) \ | |
384 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
385 | _fields \ | |
386 | return __event_len; \ | |
387 | } | |
388 | ||
389 | #include TRACEPOINT_INCLUDE | |
390 | ||
1ddfd641 MD |
391 | /* |
392 | * Stage 3.1 of tracepoint event generation. | |
393 | * | |
394 | * Create static inline function that layout the filter stack data. | |
4774c8f3 | 395 | * We make both write and nowrite data available to the filter. |
1ddfd641 MD |
396 | */ |
397 | ||
398 | /* Reset all macros within TRACEPOINT_EVENT */ | |
399 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 MD |
400 | #include <lttng/ust-tracepoint-event-write.h> |
401 | #include <lttng/ust-tracepoint-event-nowrite.h> | |
1ddfd641 | 402 | |
4774c8f3 | 403 | #undef _ctf_integer_ext |
180901e6 | 404 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
fa099471 | 405 | if (lttng_is_signed_type(_type)) { \ |
3ebeea0d MD |
406 | int64_t __ctf_tmp_int64; \ |
407 | switch (sizeof(_type)) { \ | |
408 | case 1: \ | |
409 | { \ | |
410 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ | |
411 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
412 | break; \ | |
413 | } \ | |
414 | case 2: \ | |
415 | { \ | |
416 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
417 | if (_byte_order != BYTE_ORDER) \ |
418 | __tmp.v = bswap_16(__tmp.v); \ | |
3ebeea0d MD |
419 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
420 | break; \ | |
421 | } \ | |
422 | case 4: \ | |
423 | { \ | |
424 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
425 | if (_byte_order != BYTE_ORDER) \ |
426 | __tmp.v = bswap_32(__tmp.v); \ | |
3ebeea0d MD |
427 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
428 | break; \ | |
429 | } \ | |
430 | case 8: \ | |
431 | { \ | |
432 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
433 | if (_byte_order != BYTE_ORDER) \ |
434 | __tmp.v = bswap_64(__tmp.v); \ | |
3ebeea0d MD |
435 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
436 | break; \ | |
437 | } \ | |
438 | default: \ | |
439 | abort(); \ | |
440 | }; \ | |
fa099471 MD |
441 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ |
442 | } else { \ | |
3ebeea0d MD |
443 | uint64_t __ctf_tmp_uint64; \ |
444 | switch (sizeof(_type)) { \ | |
445 | case 1: \ | |
446 | { \ | |
447 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ | |
448 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
449 | break; \ | |
450 | } \ | |
451 | case 2: \ | |
452 | { \ | |
453 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
454 | if (_byte_order != BYTE_ORDER) \ |
455 | __tmp.v = bswap_16(__tmp.v); \ | |
3ebeea0d MD |
456 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
457 | break; \ | |
458 | } \ | |
459 | case 4: \ | |
460 | { \ | |
461 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
462 | if (_byte_order != BYTE_ORDER) \ |
463 | __tmp.v = bswap_32(__tmp.v); \ | |
3ebeea0d MD |
464 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
465 | break; \ | |
466 | } \ | |
467 | case 8: \ | |
468 | { \ | |
469 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ | |
7018d9d4 MD |
470 | if (_byte_order != BYTE_ORDER) \ |
471 | __tmp.v = bswap_64(__tmp.v); \ | |
3ebeea0d MD |
472 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
473 | break; \ | |
474 | } \ | |
475 | default: \ | |
476 | abort(); \ | |
477 | }; \ | |
fa099471 MD |
478 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ |
479 | } \ | |
1ddfd641 MD |
480 | __stack_data += sizeof(int64_t); |
481 | ||
4774c8f3 | 482 | #undef _ctf_float |
180901e6 | 483 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
fa099471 MD |
484 | { \ |
485 | double __ctf_tmp_double = (double) (_type) (_src); \ | |
486 | memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \ | |
487 | __stack_data += sizeof(double); \ | |
488 | } | |
1ddfd641 | 489 | |
4774c8f3 | 490 | #undef _ctf_array_encoded |
180901e6 | 491 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
fa099471 MD |
492 | { \ |
493 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
59034aab | 494 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
495 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
496 | __stack_data += sizeof(unsigned long); \ | |
b1239ad6 MD |
497 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
498 | __stack_data += sizeof(void *); \ | |
fa099471 | 499 | } |
1ddfd641 | 500 | |
4774c8f3 MD |
501 | #undef _ctf_sequence_encoded |
502 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
f968510a | 503 | _src_length, _encoding, _nowrite, _elem_type_base) \ |
fa099471 MD |
504 | { \ |
505 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
59034aab | 506 | const void *__ctf_tmp_ptr = (_src); \ |
fa099471 MD |
507 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
508 | __stack_data += sizeof(unsigned long); \ | |
b1239ad6 MD |
509 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
510 | __stack_data += sizeof(void *); \ | |
fa099471 | 511 | } |
1ddfd641 | 512 | |
4774c8f3 | 513 | #undef _ctf_string |
180901e6 | 514 | #define _ctf_string(_item, _src, _nowrite) \ |
fa099471 | 515 | { \ |
24a39530 PP |
516 | const void *__ctf_tmp_ptr = \ |
517 | ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \ | |
b1239ad6 MD |
518 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
519 | __stack_data += sizeof(void *); \ | |
fa099471 | 520 | } |
1ddfd641 | 521 | |
c785c634 MD |
522 | #undef _ctf_enum |
523 | #define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \ | |
524 | _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite) | |
525 | ||
1ddfd641 MD |
526 | #undef TP_ARGS |
527 | #define TP_ARGS(...) __VA_ARGS__ | |
528 | ||
529 | #undef TP_FIELDS | |
530 | #define TP_FIELDS(...) __VA_ARGS__ | |
531 | ||
532 | #undef TRACEPOINT_EVENT_CLASS | |
533 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
534 | static inline \ | |
535 | void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\ | |
536 | _TP_ARGS_DATA_PROTO(_args)) \ | |
537 | { \ | |
538 | _fields \ | |
539 | } | |
540 | ||
541 | #include TRACEPOINT_INCLUDE | |
542 | ||
1c324e59 | 543 | /* |
df854e41 | 544 | * Stage 4 of tracepoint event generation. |
1c324e59 MD |
545 | * |
546 | * Create static inline function that calculates event payload alignment. | |
547 | */ | |
548 | ||
549 | /* Reset all macros within TRACEPOINT_EVENT */ | |
550 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 551 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 552 | |
4774c8f3 | 553 | #undef _ctf_integer_ext |
180901e6 | 554 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
555 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
556 | ||
4774c8f3 | 557 | #undef _ctf_float |
180901e6 | 558 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
559 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
560 | ||
4774c8f3 | 561 | #undef _ctf_array_encoded |
180901e6 | 562 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
563 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); |
564 | ||
4774c8f3 | 565 | #undef _ctf_sequence_encoded |
f968510a PP |
566 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
567 | _src_length, _encoding, _nowrite, _elem_type_base) \ | |
1c324e59 MD |
568 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
569 | __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); | |
570 | ||
4774c8f3 | 571 | #undef _ctf_string |
180901e6 | 572 | #define _ctf_string(_item, _src, _nowrite) |
1c324e59 | 573 | |
c785c634 MD |
574 | #undef _ctf_enum |
575 | #define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \ | |
576 | _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite) | |
577 | ||
1c324e59 | 578 | #undef TP_ARGS |
2eda209b | 579 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
580 | |
581 | #undef TP_FIELDS | |
2eda209b | 582 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 MD |
583 | |
584 | #undef TRACEPOINT_EVENT_CLASS | |
585 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
586 | static inline lttng_ust_notrace \ |
587 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \ | |
1c324e59 MD |
588 | static inline \ |
589 | size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \ | |
590 | { \ | |
591 | size_t __event_align = 1; \ | |
592 | _fields \ | |
593 | return __event_align; \ | |
594 | } | |
595 | ||
596 | #include TRACEPOINT_INCLUDE | |
597 | ||
598 | ||
599 | /* | |
df854e41 | 600 | * Stage 5 of tracepoint event generation. |
1c324e59 MD |
601 | * |
602 | * Create the probe function. This function calls event size calculation | |
603 | * and writes event data into the buffer. | |
604 | */ | |
605 | ||
606 | /* Reset all macros within TRACEPOINT_EVENT */ | |
607 | #include <lttng/ust-tracepoint-event-reset.h> | |
4774c8f3 | 608 | #include <lttng/ust-tracepoint-event-write.h> |
1c324e59 | 609 | |
4774c8f3 | 610 | #undef _ctf_integer_ext |
180901e6 | 611 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \ |
1c324e59 MD |
612 | { \ |
613 | _type __tmp = (_src); \ | |
614 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
615 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
616 | } | |
617 | ||
4774c8f3 | 618 | #undef _ctf_float |
180901e6 | 619 | #define _ctf_float(_type, _item, _src, _nowrite) \ |
1c324e59 MD |
620 | { \ |
621 | _type __tmp = (_src); \ | |
622 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
623 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
624 | } | |
625 | ||
4774c8f3 | 626 | #undef _ctf_array_encoded |
180901e6 | 627 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \ |
1c324e59 MD |
628 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
629 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); | |
630 | ||
4774c8f3 MD |
631 | #undef _ctf_sequence_encoded |
632 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
f968510a | 633 | _src_length, _encoding, _nowrite, _elem_type_base) \ |
1c324e59 | 634 | { \ |
d71b57b9 | 635 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
1c324e59 MD |
636 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
637 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
638 | } \ | |
639 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
640 | __chan->ops->event_write(&__ctx, _src, \ | |
641 | sizeof(_type) * __get_dynamic_len(dest)); | |
642 | ||
a44c74d9 MD |
643 | /* |
644 | * __chan->ops->u.has_strcpy is a flag letting us know if the LTTng-UST | |
645 | * tracepoint provider ABI implements event_strcpy. This dynamic check | |
646 | * can be removed when the tracepoint provider ABI moves to 2. | |
647 | */ | |
648 | #if (LTTNG_UST_PROVIDER_MAJOR > 1) | |
649 | #error "Tracepoint probe provider major version has changed. Please remove dynamic check for has_strcpy." | |
650 | #endif | |
651 | ||
4774c8f3 | 652 | #undef _ctf_string |
180901e6 | 653 | #define _ctf_string(_item, _src, _nowrite) \ |
24a39530 PP |
654 | { \ |
655 | const char *__ctf_tmp_string = \ | |
656 | ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \ | |
657 | lib_ring_buffer_align_ctx(&__ctx, \ | |
658 | lttng_alignof(*__ctf_tmp_string)); \ | |
659 | if (__chan->ops->u.has_strcpy) \ | |
660 | __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \ | |
661 | __get_dynamic_len(dest)); \ | |
662 | else \ | |
663 | __chan->ops->event_write(&__ctx, __ctf_tmp_string, \ | |
664 | __get_dynamic_len(dest)); \ | |
665 | } | |
666 | ||
1c324e59 | 667 | |
c785c634 MD |
668 | #undef _ctf_enum |
669 | #define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \ | |
670 | _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite) | |
671 | ||
1c324e59 MD |
672 | /* Beware: this get len actually consumes the len value */ |
673 | #undef __get_dynamic_len | |
d71b57b9 | 674 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
1c324e59 MD |
675 | |
676 | #undef TP_ARGS | |
2eda209b | 677 | #define TP_ARGS(...) __VA_ARGS__ |
1c324e59 MD |
678 | |
679 | #undef TP_FIELDS | |
2eda209b | 680 | #define TP_FIELDS(...) __VA_ARGS__ |
1c324e59 | 681 | |
95c25348 PW |
682 | /* |
683 | * For state dump, check that "session" argument (mandatory) matches the | |
684 | * session this event belongs to. Ensures that we write state dump data only | |
685 | * into the started session, not into all sessions. | |
686 | */ | |
687 | #undef _TP_SESSION_CHECK | |
688 | #ifdef TP_SESSION_CHECK | |
689 | #define _TP_SESSION_CHECK(session, csession) (session == csession) | |
690 | #else /* TP_SESSION_CHECK */ | |
691 | #define _TP_SESSION_CHECK(session, csession) 1 | |
692 | #endif /* TP_SESSION_CHECK */ | |
693 | ||
97904b41 MD |
694 | /* |
695 | * Use of __builtin_return_address(0) sometimes seems to cause stack | |
696 | * corruption on 32-bit PowerPC. Disable this feature on that | |
697 | * architecture for now by always using the NULL value for the ip | |
698 | * context. | |
699 | */ | |
5dadb547 MD |
700 | #undef _TP_IP_PARAM |
701 | #ifdef TP_IP_PARAM | |
e1d09f9e | 702 | #define _TP_IP_PARAM(x) (x) |
5dadb547 | 703 | #else /* TP_IP_PARAM */ |
97904b41 MD |
704 | |
705 | #if defined(__PPC__) && !defined(__PPC64__) | |
706 | #define _TP_IP_PARAM(x) NULL | |
707 | #else /* #if defined(__PPC__) && !defined(__PPC64__) */ | |
e1d09f9e | 708 | #define _TP_IP_PARAM(x) __builtin_return_address(0) |
97904b41 MD |
709 | #endif /* #else #if defined(__PPC__) && !defined(__PPC64__) */ |
710 | ||
5dadb547 MD |
711 | #endif /* TP_IP_PARAM */ |
712 | ||
1ddfd641 MD |
713 | /* |
714 | * Using twice size for filter stack data to hold size and pointer for | |
715 | * each field (worse case). For integers, max size required is 64-bit. | |
716 | * Same for double-precision floats. Those fit within | |
717 | * 2*sizeof(unsigned long) for all supported architectures. | |
61ce3223 | 718 | * Perform UNION (||) of filter runtime list. |
1ddfd641 | 719 | */ |
1c324e59 MD |
720 | #undef TRACEPOINT_EVENT_CLASS |
721 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
a8909ba5 PW |
722 | static lttng_ust_notrace \ |
723 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \ | |
724 | static \ | |
725 | void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \ | |
1c324e59 | 726 | { \ |
53569322 | 727 | struct lttng_event *__event = (struct lttng_event *) __tp_data; \ |
7dd08bec | 728 | struct lttng_channel *__chan = __event->chan; \ |
f280cb51 | 729 | struct lttng_ust_lib_ring_buffer_ctx __ctx; \ |
53569322 | 730 | struct lttng_stack_ctx __lttng_ctx; \ |
1c324e59 MD |
731 | size_t __event_len, __event_align; \ |
732 | size_t __dynamic_len_idx = 0; \ | |
d71b57b9 | 733 | union { \ |
792310b7 MD |
734 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1]; \ |
735 | char __filter_stack_data[2 * sizeof(unsigned long) * (_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1)]; \ | |
d71b57b9 | 736 | } __stackvar; \ |
1c324e59 MD |
737 | int __ret; \ |
738 | \ | |
739 | if (0) \ | |
740 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
95c25348 PW |
741 | if (!_TP_SESSION_CHECK(session, __chan->session)) \ |
742 | return; \ | |
1c324e59 MD |
743 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
744 | return; \ | |
745 | if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ | |
746 | return; \ | |
747 | if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ | |
748 | return; \ | |
1b436e01 MD |
749 | if (caa_unlikely(!TP_RCU_LINK_TEST())) \ |
750 | return; \ | |
e58095ef | 751 | if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \ |
f488575f | 752 | struct lttng_bytecode_runtime *bc_runtime; \ |
dcdeaff0 | 753 | int __filter_record = __event->has_enablers_without_bytecode; \ |
f488575f | 754 | \ |
1ddfd641 | 755 | __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \ |
f488575f | 756 | _TP_ARGS_DATA_VAR(_args)); \ |
000b8662 | 757 | tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
61ce3223 | 758 | if (caa_unlikely(bc_runtime->filter(bc_runtime, \ |
8a92ed2a MD |
759 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
760 | __filter_record = 1; \ | |
f488575f | 761 | } \ |
8a92ed2a | 762 | if (caa_likely(!__filter_record)) \ |
61ce3223 | 763 | return; \ |
1ddfd641 MD |
764 | } \ |
765 | __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \ | |
1c324e59 MD |
766 | _TP_ARGS_DATA_VAR(_args)); \ |
767 | __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \ | |
53569322 MD |
768 | memset(&__lttng_ctx, 0, sizeof(__lttng_ctx)); \ |
769 | __lttng_ctx.event = __event; \ | |
770 | __lttng_ctx.chan_ctx = tp_rcu_dereference_bp(__chan->ctx); \ | |
771 | __lttng_ctx.event_ctx = tp_rcu_dereference_bp(__event->ctx); \ | |
1c324e59 | 772 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
53569322 | 773 | __event_align, -1, __chan->handle, &__lttng_ctx); \ |
e1d09f9e | 774 | __ctx.ip = _TP_IP_PARAM(TP_IP_PARAM); \ |
1c324e59 MD |
775 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
776 | if (__ret < 0) \ | |
777 | return; \ | |
778 | _fields \ | |
779 | __chan->ops->event_commit(&__ctx); \ | |
780 | } | |
781 | ||
782 | #include TRACEPOINT_INCLUDE | |
783 | ||
784 | #undef __get_dynamic_len | |
785 | ||
68755429 MD |
786 | /* |
787 | * Stage 5.1 of tracepoint event generation. | |
788 | * | |
789 | * Create probe signature | |
790 | */ | |
791 | ||
792 | /* Reset all macros within TRACEPOINT_EVENT */ | |
793 | #include <lttng/ust-tracepoint-event-reset.h> | |
794 | ||
795 | #undef TP_ARGS | |
2eda209b | 796 | #define TP_ARGS(...) __VA_ARGS__ |
9eb06182 MD |
797 | |
798 | #define _TP_EXTRACT_STRING2(...) #__VA_ARGS__ | |
68755429 MD |
799 | |
800 | #undef TRACEPOINT_EVENT_CLASS | |
801 | #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \ | |
52ecff8a | 802 | static const char __tp_event_signature___##_provider##___##_name[] = \ |
9eb06182 | 803 | _TP_EXTRACT_STRING2(_args); |
68755429 MD |
804 | |
805 | #include TRACEPOINT_INCLUDE | |
806 | ||
9eb06182 MD |
807 | #undef _TP_EXTRACT_STRING2 |
808 | ||
05ceaafd | 809 | /* |
882a56d7 | 810 | * Stage 6 of tracepoint event generation. |
1c324e59 | 811 | * |
df854e41 MD |
812 | * Tracepoint loglevel mapping definition generation. We generate a |
813 | * symbol for each mapping for a provider/event to ensure at most a 1 to | |
814 | * 1 mapping between events and loglevels. If the symbol is repeated, | |
815 | * the compiler will complain. | |
05ceaafd MD |
816 | */ |
817 | ||
818 | /* Reset all macros within TRACEPOINT_EVENT */ | |
819 | #include <lttng/ust-tracepoint-event-reset.h> | |
820 | ||
958b101d MD |
821 | /* |
822 | * Declare _loglevel___##__provider##___##__name as non-static, with | |
823 | * hidden visibility for c++ handling of weakref. We do a weakref to the | |
824 | * symbol in a later stage, which requires that the symbol is not | |
825 | * mangled. | |
826 | */ | |
827 | #ifdef __cplusplus | |
828 | #define LTTNG_TP_EXTERN_C extern "C" | |
829 | #else | |
830 | #define LTTNG_TP_EXTERN_C | |
831 | #endif | |
832 | ||
05ceaafd | 833 | #undef TRACEPOINT_LOGLEVEL |
457a6b58 MD |
834 | #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \ |
835 | static const int _loglevel_value___##__provider##___##__name = __loglevel; \ | |
958b101d MD |
836 | LTTNG_TP_EXTERN_C const int *_loglevel___##__provider##___##__name \ |
837 | __attribute__((visibility("hidden"))) = \ | |
457a6b58 | 838 | &_loglevel_value___##__provider##___##__name; |
df854e41 MD |
839 | |
840 | #include TRACEPOINT_INCLUDE | |
841 | ||
958b101d | 842 | #undef LTTNG_TP_EXTERN_C |
958b101d | 843 | |
6ddc916d MD |
844 | /* |
845 | * Stage 6.1 of tracepoint event generation. | |
846 | * | |
847 | * Tracepoint UML URI info. | |
848 | */ | |
849 | ||
850 | /* Reset all macros within TRACEPOINT_EVENT */ | |
851 | #include <lttng/ust-tracepoint-event-reset.h> | |
852 | ||
958b101d MD |
853 | /* |
854 | * Declare _model_emf_uri___##__provider##___##__name as non-static, | |
855 | * with hidden visibility for c++ handling of weakref. We do a weakref | |
856 | * to the symbol in a later stage, which requires that the symbol is not | |
857 | * mangled. | |
858 | */ | |
859 | #ifdef __cplusplus | |
860 | #define LTTNG_TP_EXTERN_C extern "C" | |
861 | #else | |
862 | #define LTTNG_TP_EXTERN_C | |
863 | #endif | |
864 | ||
6ddc916d MD |
865 | #undef TRACEPOINT_MODEL_EMF_URI |
866 | #define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \ | |
958b101d | 867 | LTTNG_TP_EXTERN_C const char *_model_emf_uri___##__provider##___##__name \ |
0ab954a9 | 868 | __attribute__((visibility("hidden"))) = __uri; \ |
6ddc916d MD |
869 | |
870 | #include TRACEPOINT_INCLUDE | |
871 | ||
958b101d | 872 | #undef LTTNG_TP_EXTERN_C |
958b101d | 873 | |
df854e41 | 874 | /* |
882a56d7 | 875 | * Stage 7.1 of tracepoint event generation. |
df854e41 MD |
876 | * |
877 | * Create events description structures. We use a weakref because | |
878 | * loglevels are optional. If not declared, the event will point to the | |
879 | * a loglevel that contains NULL. | |
880 | */ | |
881 | ||
882 | /* Reset all macros within TRACEPOINT_EVENT */ | |
883 | #include <lttng/ust-tracepoint-event-reset.h> | |
884 | ||
885 | #undef TRACEPOINT_EVENT_INSTANCE | |
886 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
882a56d7 MD |
887 | static const int * \ |
888 | __ref_loglevel___##_provider##___##_name \ | |
889 | __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \ | |
6ddc916d MD |
890 | static const char * \ |
891 | __ref_model_emf_uri___##_provider##___##_name \ | |
892 | __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\ | |
52ecff8a | 893 | static const struct lttng_event_desc __event_desc___##_provider##_##_name = { \ |
df854e41 | 894 | .name = #_provider ":" #_name, \ |
fbdeb5ec | 895 | .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\ |
46d52200 ZT |
896 | .ctx = NULL, \ |
897 | .fields = __event_fields___##_provider##___##_template, \ | |
792310b7 | 898 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template) - 1, \ |
882a56d7 | 899 | .loglevel = &__ref_loglevel___##_provider##___##_name, \ |
68755429 | 900 | .signature = __tp_event_signature___##_provider##___##_template, \ |
c785c634 MD |
901 | .u = { \ |
902 | .ext = { \ | |
903 | .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \ | |
904 | }, \ | |
905 | }, \ | |
df854e41 MD |
906 | }; |
907 | ||
908 | #include TRACEPOINT_INCLUDE | |
05ceaafd | 909 | |
df854e41 | 910 | /* |
882a56d7 | 911 | * Stage 7.2 of tracepoint event generation. |
df854e41 MD |
912 | * |
913 | * Create array of events. | |
914 | */ | |
915 | ||
916 | /* Reset all macros within TRACEPOINT_EVENT */ | |
917 | #include <lttng/ust-tracepoint-event-reset.h> | |
918 | ||
919 | #undef TRACEPOINT_EVENT_INSTANCE | |
920 | #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \ | |
921 | &__event_desc___##_provider##_##_name, | |
922 | ||
923 | static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = { | |
05ceaafd | 924 | #include TRACEPOINT_INCLUDE |
792310b7 | 925 | NULL, /* Dummy, C99 forbids 0-len array. */ |
05ceaafd MD |
926 | }; |
927 | ||
df854e41 | 928 | |
05ceaafd | 929 | /* |
882a56d7 | 930 | * Stage 8 of tracepoint event generation. |
05ceaafd MD |
931 | * |
932 | * Create a toplevel descriptor for the whole probe. | |
933 | */ | |
934 | ||
935 | /* non-const because list head will be modified when registered. */ | |
936 | static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = { | |
df854e41 | 937 | .provider = __tp_stringify(TRACEPOINT_PROVIDER), |
05ceaafd | 938 | .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER), |
792310b7 | 939 | .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)) - 1, |
46d52200 ZT |
940 | .head = { NULL, NULL }, |
941 | .lazy_init_head = { NULL, NULL }, | |
942 | .lazy = 0, | |
71d31690 MD |
943 | .major = LTTNG_UST_PROVIDER_MAJOR, |
944 | .minor = LTTNG_UST_PROVIDER_MINOR, | |
05ceaafd MD |
945 | }; |
946 | ||
f0cc794d MD |
947 | static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER); |
948 | ||
05ceaafd | 949 | /* |
882a56d7 | 950 | * Stage 9 of tracepoint event generation. |
05ceaafd | 951 | * |
1c324e59 | 952 | * Register/unregister probes at module load/unload. |
628e1d81 MD |
953 | * |
954 | * Generate the constructor as an externally visible symbol for use when | |
955 | * linking the probe statically. | |
f0cc794d MD |
956 | * |
957 | * Register refcount is protected by libc dynamic loader mutex. | |
1c324e59 MD |
958 | */ |
959 | ||
960 | /* Reset all macros within TRACEPOINT_EVENT */ | |
961 | #include <lttng/ust-tracepoint-event-reset.h> | |
a8909ba5 PW |
962 | static void lttng_ust_notrace __attribute__((constructor)) |
963 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void); | |
964 | static void | |
1c324e59 MD |
965 | _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void) |
966 | { | |
967 | int ret; | |
968 | ||
f0cc794d MD |
969 | if (_TP_COMBINE_TOKENS(__probe_register_refcount___, |
970 | TRACEPOINT_PROVIDER)++) { | |
971 | return; | |
972 | } | |
e8bd1da7 MD |
973 | /* |
974 | * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a | |
975 | * static inline function that ensures every probe PROVIDER | |
976 | * argument match the provider within which they appear. It | |
977 | * calls empty static inline functions, and therefore has no | |
978 | * runtime effect. However, if it detects an error, a linker | |
979 | * error will appear. | |
980 | */ | |
981 | _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(); | |
7dd08bec | 982 | ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
7d381d6e MD |
983 | if (ret) { |
984 | fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret); | |
985 | abort(); | |
986 | } | |
1c324e59 MD |
987 | } |
988 | ||
a8909ba5 PW |
989 | static void lttng_ust_notrace __attribute__((destructor)) |
990 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void); | |
991 | static void | |
1c324e59 MD |
992 | _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void) |
993 | { | |
f0cc794d MD |
994 | if (--_TP_COMBINE_TOKENS(__probe_register_refcount___, |
995 | TRACEPOINT_PROVIDER)) { | |
996 | return; | |
997 | } | |
7dd08bec | 998 | lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER)); |
1c324e59 | 999 | } |
628e1d81 MD |
1000 | |
1001 | int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER); |