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Implement custom field support
[lttng-modules.git] / probes / lttng-tracepoint-event-impl.h
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1/*
2 * lttng-tracepoint-event-impl.h
3 *
4 * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
5 * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; only
10 * version 2.1 of the License.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <linux/uaccess.h>
23#include <linux/debugfs.h>
24#include <linux/rculist.h>
25#include <asm/byteorder.h>
26#include <linux/swab.h>
27
28#include <probes/lttng.h>
29#include <probes/lttng-types.h>
30#include <probes/lttng-probe-user.h>
31#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
32#include <wrapper/ringbuffer/frontend_types.h>
33#include <wrapper/ringbuffer/backend.h>
34#include <wrapper/rcu.h>
35#include <lttng-events.h>
36#include <lttng-tracer-core.h>
37
38/*
39 * Macro declarations used for all stages.
40 */
41
42/*
43 * LTTng name mapping macros. LTTng remaps some of the kernel events to
44 * enforce name-spacing.
45 */
46#undef LTTNG_TRACEPOINT_EVENT_MAP
47#define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \
48 LTTNG_TRACEPOINT_EVENT_CLASS(map, \
49 PARAMS(proto), \
50 PARAMS(args), \
51 PARAMS(fields)) \
52 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
53
54#undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS
55#define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \
56 LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \
57 PARAMS(fields)) \
58 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map)
59
60#undef LTTNG_TRACEPOINT_EVENT_CODE_MAP
61#define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \
62 LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \
63 PARAMS(proto), \
64 PARAMS(args), \
65 PARAMS(_locvar), \
66 PARAMS(_code_pre), \
67 PARAMS(fields), \
68 PARAMS(_code_post)) \
69 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
70
71#undef LTTNG_TRACEPOINT_EVENT_CODE
72#define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \
73 LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \
74 PARAMS(proto), \
75 PARAMS(args), \
76 PARAMS(_locvar), \
77 PARAMS(_code_pre), \
78 PARAMS(fields), \
79 PARAMS(_code_post))
80
81/*
82 * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function
83 * handlers for events. That is, if all events have the same parameters
84 * and just have distinct trace points. Each tracepoint can be defined
85 * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the
86 * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint.
87 *
88 * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and
89 * template.
90 */
91
92#undef LTTNG_TRACEPOINT_EVENT
93#define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \
94 LTTNG_TRACEPOINT_EVENT_MAP(name, name, \
95 PARAMS(proto), \
96 PARAMS(args), \
97 PARAMS(fields))
98
99#undef LTTNG_TRACEPOINT_EVENT_NOARGS
100#define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \
101 LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields))
102
103#undef LTTNG_TRACEPOINT_EVENT_INSTANCE
104#define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \
105 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args))
106
107#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS
108#define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \
109 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name)
110
111#undef LTTNG_TRACEPOINT_EVENT_CLASS
112#define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \
113 LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \
114 PARAMS(_fields), )
115
116#undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS
117#define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
118 LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), )
119
120
121/*
122 * Stage 1 of the trace events.
123 *
124 * Create dummy trace calls for each events, verifying that the LTTng module
125 * instrumentation headers match the kernel arguments. Will be optimized
126 * out by the compiler.
127 */
128
129/* Reset all macros within TRACEPOINT_EVENT */
130#include <probes/lttng-events-reset.h>
131
132#undef TP_PROTO
133#define TP_PROTO(...) __VA_ARGS__
134
135#undef TP_ARGS
136#define TP_ARGS(...) __VA_ARGS__
137
138#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
139#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
140void trace_##_name(_proto);
141
142#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
143#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
144void trace_##_name(void);
145
146#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
147
148/*
149 * Stage 1.1 of the trace events.
150 *
151 * Create dummy trace prototypes for each event class, and for each used
152 * template. This will allow checking whether the prototypes from the
153 * class and the instance using the class actually match.
154 */
155
156#include <probes/lttng-events-reset.h> /* Reset all macros within TRACE_EVENT */
157
158#undef TP_PROTO
159#define TP_PROTO(...) __VA_ARGS__
160
161#undef TP_ARGS
162#define TP_ARGS(...) __VA_ARGS__
163
164#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
165#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
166void __event_template_proto___##_template(_proto);
167
168#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
169#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
170void __event_template_proto___##_template(void);
171
172#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
173#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
174void __event_template_proto___##_name(_proto);
175
176#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
177#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
178void __event_template_proto___##_name(void);
179
180#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
181
182/*
183 * Stage 2 of the trace events.
184 *
185 * Create event field type metadata section.
186 * Each event produce an array of fields.
187 */
188
189/* Reset all macros within TRACEPOINT_EVENT */
190#include <probes/lttng-events-reset.h>
191#include <probes/lttng-events-write.h>
192#include <probes/lttng-events-nowrite.h>
193
194#undef _ctf_integer_ext
195#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
196 { \
197 .name = #_item, \
198 .type = __type_integer(_type, 0, 0, -1, _byte_order, _base, none),\
199 .nowrite = _nowrite, \
200 .user = _user, \
201 },
202
203#undef _ctf_array_encoded
204#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
205 { \
206 .name = #_item, \
207 .type = \
208 { \
209 .atype = atype_array, \
210 .u = \
211 { \
212 .array = \
213 { \
214 .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _encoding), \
215 .length = _length, \
216 } \
217 } \
218 }, \
219 .nowrite = _nowrite, \
220 .user = _user, \
221 },
222
223#undef _ctf_array_bitfield
224#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
225 { \
226 .name = #_item, \
227 .type = \
228 { \
229 .atype = atype_array, \
230 .u = \
231 { \
232 .array = \
233 { \
234 .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \
235 .length = (_length) * sizeof(_type) * CHAR_BIT, \
236 .elem_alignment = lttng_alignof(_type), \
237 } \
238 } \
239 }, \
240 .nowrite = _nowrite, \
241 .user = _user, \
242 },
243
244
245#undef _ctf_sequence_encoded
246#define _ctf_sequence_encoded(_type, _item, _src, \
247 _length_type, _src_length, _encoding, \
248 _byte_order, _base, _user, _nowrite) \
249 { \
250 .name = #_item, \
251 .type = \
252 { \
253 .atype = atype_sequence, \
254 .u = \
255 { \
256 .sequence = \
257 { \
258 .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \
259 .elem_type = __type_integer(_type, 0, 0, -1, _byte_order, _base, _encoding), \
260 }, \
261 }, \
262 }, \
263 .nowrite = _nowrite, \
264 .user = _user, \
265 },
266
267#undef _ctf_sequence_bitfield
268#define _ctf_sequence_bitfield(_type, _item, _src, \
269 _length_type, _src_length, \
270 _user, _nowrite) \
271 { \
272 .name = #_item, \
273 .type = \
274 { \
275 .atype = atype_sequence, \
276 .u = \
277 { \
278 .sequence = \
279 { \
280 .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \
281 .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \
282 .elem_alignment = lttng_alignof(_type), \
283 }, \
284 }, \
285 }, \
286 .nowrite = _nowrite, \
287 .user = _user, \
288 },
289
290#undef _ctf_string
291#define _ctf_string(_item, _src, _user, _nowrite) \
292 { \
293 .name = #_item, \
294 .type = \
295 { \
296 .atype = atype_string, \
297 .u = \
298 { \
299 .basic = { .string = { .encoding = lttng_encode_UTF8 } } \
300 }, \
301 }, \
302 .nowrite = _nowrite, \
303 .user = _user, \
304 },
305
306
307#undef ctf_custom_field
308#define ctf_custom_field(_type, _item, _code) \
309 { \
310 .name = #_item, \
311 .type = { _type }, \
312 .nowrite = 0, \
313 .user = 0, \
314 },
315
316#undef ctf_custom_type
317#define ctf_custom_type(...) __VA_ARGS__
318
319#undef TP_FIELDS
320#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
321
322#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
323#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
324 static const struct lttng_event_field __event_fields___##_name[] = { \
325 _fields \
326 };
327
328#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
329#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
330 LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post)
331
332#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
333
334/*
335 * Stage 3 of the trace events.
336 *
337 * Create probe callback prototypes.
338 */
339
340/* Reset all macros within TRACEPOINT_EVENT */
341#include <probes/lttng-events-reset.h>
342
343#undef TP_PROTO
344#define TP_PROTO(...) __VA_ARGS__
345
346#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
347#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
348static void __event_probe__##_name(void *__data, _proto);
349
350#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
351#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
352static void __event_probe__##_name(void *__data);
353
354#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
355
356/*
357 * Stage 4 of the trace events.
358 *
359 * Create static inline function that calculates event size.
360 */
361
362/* Reset all macros within TRACEPOINT_EVENT */
363#include <probes/lttng-events-reset.h>
364#include <probes/lttng-events-write.h>
365
366#undef _ctf_integer_ext
367#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
368 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
369 __event_len += sizeof(_type);
370
371#undef _ctf_array_encoded
372#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
373 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
374 __event_len += sizeof(_type) * (_length);
375
376#undef _ctf_array_bitfield
377#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
378 _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite)
379
380#undef _ctf_sequence_encoded
381#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
382 _src_length, _encoding, _byte_order, _base, _user, _nowrite) \
383 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
384 __event_len += sizeof(_length_type); \
385 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
386 { \
387 size_t __seqlen = (_src_length); \
388 \
389 if (unlikely(++this_cpu_ptr(&lttng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \
390 goto error; \
391 barrier(); /* reserve before use. */ \
392 this_cpu_ptr(&lttng_dynamic_len_stack)->stack[this_cpu_ptr(&lttng_dynamic_len_stack)->offset - 1] = __seqlen; \
393 __event_len += sizeof(_type) * __seqlen; \
394 }
395
396#undef _ctf_sequence_bitfield
397#define _ctf_sequence_bitfield(_type, _item, _src, \
398 _length_type, _src_length, \
399 _user, _nowrite) \
400 _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \
401 none, __LITTLE_ENDIAN, 10, _user, _nowrite)
402
403/*
404 * ctf_user_string includes \0. If returns 0, it faulted, so we set size to
405 * 1 (\0 only).
406 */
407#undef _ctf_string
408#define _ctf_string(_item, _src, _user, _nowrite) \
409 if (unlikely(++this_cpu_ptr(&lttng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \
410 goto error; \
411 barrier(); /* reserve before use. */ \
412 if (_user) { \
413 __event_len += this_cpu_ptr(&lttng_dynamic_len_stack)->stack[this_cpu_ptr(&lttng_dynamic_len_stack)->offset - 1] = \
414 max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \
415 } else { \
416 __event_len += this_cpu_ptr(&lttng_dynamic_len_stack)->stack[this_cpu_ptr(&lttng_dynamic_len_stack)->offset - 1] = \
417 strlen(_src) + 1; \
418 }
419
420#undef ctf_align
421#define ctf_align(_type) \
422 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type));
423
424#undef ctf_custom_field
425#define ctf_custom_field(_type, _item, _code) \
426 { \
427 _code \
428 }
429
430#undef ctf_custom_code
431#define ctf_custom_code(...) __VA_ARGS__
432
433#undef TP_PROTO
434#define TP_PROTO(...) __VA_ARGS__
435
436#undef TP_FIELDS
437#define TP_FIELDS(...) __VA_ARGS__
438
439#undef TP_locvar
440#define TP_locvar(...) __VA_ARGS__
441
442#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
443#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
444static inline ssize_t __event_get_size__##_name(void *__tp_locvar, _proto) \
445{ \
446 size_t __event_len = 0; \
447 unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \
448 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
449 \
450 _fields \
451 return __event_len; \
452 \
453error: \
454 __attribute__((unused)); \
455 return -1; \
456}
457
458#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
459#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
460static inline ssize_t __event_get_size__##_name(void *__tp_locvar) \
461{ \
462 size_t __event_len = 0; \
463 unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \
464 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
465 \
466 _fields \
467 return __event_len; \
468 \
469error: \
470 __attribute__((unused)); \
471 return -1; \
472}
473
474#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
475
476
477/*
478 * Stage 4.1 of tracepoint event generation.
479 *
480 * Create static inline function that layout the filter stack data.
481 * We make both write and nowrite data available to the filter.
482 */
483
484/* Reset all macros within TRACEPOINT_EVENT */
485#include <probes/lttng-events-reset.h>
486#include <probes/lttng-events-write.h>
487#include <probes/lttng-events-nowrite.h>
488
489#undef _ctf_integer_ext_fetched
490#define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
491 if (lttng_is_signed_type(_type)) { \
492 int64_t __ctf_tmp_int64; \
493 switch (sizeof(_type)) { \
494 case 1: \
495 { \
496 union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
497 __ctf_tmp_int64 = (int64_t) __tmp.v; \
498 break; \
499 } \
500 case 2: \
501 { \
502 union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
503 if (_byte_order != __BYTE_ORDER) \
504 __swab16s(&__tmp.v); \
505 __ctf_tmp_int64 = (int64_t) __tmp.v; \
506 break; \
507 } \
508 case 4: \
509 { \
510 union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
511 if (_byte_order != __BYTE_ORDER) \
512 __swab32s(&__tmp.v); \
513 __ctf_tmp_int64 = (int64_t) __tmp.v; \
514 break; \
515 } \
516 case 8: \
517 { \
518 union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
519 if (_byte_order != __BYTE_ORDER) \
520 __swab64s(&__tmp.v); \
521 __ctf_tmp_int64 = (int64_t) __tmp.v; \
522 break; \
523 } \
524 default: \
525 BUG_ON(1); \
526 }; \
527 memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
528 } else { \
529 uint64_t __ctf_tmp_uint64; \
530 switch (sizeof(_type)) { \
531 case 1: \
532 { \
533 union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
534 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
535 break; \
536 } \
537 case 2: \
538 { \
539 union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
540 if (_byte_order != __BYTE_ORDER) \
541 __swab16s(&__tmp.v); \
542 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
543 break; \
544 } \
545 case 4: \
546 { \
547 union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
548 if (_byte_order != __BYTE_ORDER) \
549 __swab32s(&__tmp.v); \
550 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
551 break; \
552 } \
553 case 8: \
554 { \
555 union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
556 if (_byte_order != __BYTE_ORDER) \
557 __swab64s(&__tmp.v); \
558 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
559 break; \
560 } \
561 default: \
562 BUG_ON(1); \
563 }; \
564 memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
565 } \
566 __stack_data += sizeof(int64_t);
567
568#undef _ctf_integer_ext_isuser0
569#define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \
570 _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite)
571
572#undef _ctf_integer_ext_isuser1
573#define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \
574{ \
575 union { \
576 char __array[sizeof(_user_src)]; \
577 __typeof__(_user_src) __v; \
578 } __tmp_fetch; \
579 if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \
580 &(_user_src), sizeof(_user_src))) \
581 memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \
582 _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \
583}
584
585#undef _ctf_integer_ext
586#define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \
587 _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite)
588
589#undef _ctf_array_encoded
590#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
591 { \
592 unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
593 const void *__ctf_tmp_ptr = (_src); \
594 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
595 __stack_data += sizeof(unsigned long); \
596 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
597 __stack_data += sizeof(void *); \
598 }
599
600#undef _ctf_array_bitfield
601#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
602 _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite)
603
604#undef _ctf_sequence_encoded
605#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
606 _src_length, _encoding, _byte_order, _base, _user, _nowrite) \
607 { \
608 unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
609 const void *__ctf_tmp_ptr = (_src); \
610 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
611 __stack_data += sizeof(unsigned long); \
612 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
613 __stack_data += sizeof(void *); \
614 }
615
616#undef _ctf_sequence_bitfield
617#define _ctf_sequence_bitfield(_type, _item, _src, \
618 _length_type, _src_length, \
619 _user, _nowrite) \
620 _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \
621 none, __LITTLE_ENDIAN, 10, _user, _nowrite)
622
623#undef _ctf_string
624#define _ctf_string(_item, _src, _user, _nowrite) \
625 { \
626 const void *__ctf_tmp_ptr = (_src); \
627 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
628 __stack_data += sizeof(void *); \
629 }
630
631#undef TP_PROTO
632#define TP_PROTO(...) __VA_ARGS__
633
634#undef TP_FIELDS
635#define TP_FIELDS(...) __VA_ARGS__
636
637#undef TP_locvar
638#define TP_locvar(...) __VA_ARGS__
639
640#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
641#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
642static inline \
643void __event_prepare_filter_stack__##_name(char *__stack_data, \
644 void *__tp_locvar) \
645{ \
646 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
647 \
648 _fields \
649}
650
651#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
652#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
653static inline \
654void __event_prepare_filter_stack__##_name(char *__stack_data, \
655 void *__tp_locvar, _proto) \
656{ \
657 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
658 \
659 _fields \
660}
661
662#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
663
664/*
665 * Stage 5 of the trace events.
666 *
667 * Create static inline function that calculates event payload alignment.
668 */
669
670/* Reset all macros within TRACEPOINT_EVENT */
671#include <probes/lttng-events-reset.h>
672#include <probes/lttng-events-write.h>
673
674#undef _ctf_integer_ext
675#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \
676 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
677
678#undef _ctf_array_encoded
679#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
680 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
681
682#undef _ctf_array_bitfield
683#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
684 _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite)
685
686#undef _ctf_sequence_encoded
687#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
688 _src_length, _encoding, _byte_order, _base, _user, _nowrite) \
689 __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \
690 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
691
692#undef _ctf_sequence_bitfield
693#define _ctf_sequence_bitfield(_type, _item, _src, \
694 _length_type, _src_length, \
695 _user, _nowrite) \
696 _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \
697 none, __LITTLE_ENDIAN, 10, _user, _nowrite)
698
699#undef _ctf_string
700#define _ctf_string(_item, _src, _user, _nowrite)
701
702#undef ctf_align
703#define ctf_align(_type) \
704 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
705
706#undef TP_PROTO
707#define TP_PROTO(...) __VA_ARGS__
708
709#undef TP_FIELDS
710#define TP_FIELDS(...) __VA_ARGS__
711
712#undef TP_locvar
713#define TP_locvar(...) __VA_ARGS__
714
715#undef ctf_custom_field
716#define ctf_custom_field(_type, _item, _code) _code
717
718#undef ctf_custom_code
719#define ctf_custom_code(...) \
720 { \
721 __VA_ARGS__ \
722 }
723
724#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
725#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
726static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \
727{ \
728 size_t __event_align = 1; \
729 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
730 \
731 _fields \
732 return __event_align; \
733}
734
735#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
736#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
737static inline size_t __event_get_align__##_name(void *__tp_locvar) \
738{ \
739 size_t __event_align = 1; \
740 struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
741 \
742 _fields \
743 return __event_align; \
744}
745
746#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
747
748/*
749 * Stage 6 of tracepoint event generation.
750 *
751 * Create the probe function. This function calls event size calculation
752 * and writes event data into the buffer.
753 */
754
755/* Reset all macros within TRACEPOINT_EVENT */
756#include <probes/lttng-events-reset.h>
757#include <probes/lttng-events-write.h>
758
759#undef _ctf_integer_ext_fetched
760#define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \
761 { \
762 _type __tmp = _src; \
763 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
764 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
765 }
766
767#undef _ctf_integer_ext_isuser0
768#define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \
769 _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite)
770
771#undef _ctf_integer_ext_isuser1
772#define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \
773{ \
774 union { \
775 char __array[sizeof(_user_src)]; \
776 __typeof__(_user_src) __v; \
777 } __tmp_fetch; \
778 if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \
779 &(_user_src), sizeof(_user_src))) \
780 memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \
781 _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \
782}
783
784#undef _ctf_integer_ext
785#define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \
786 _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite)
787
788#undef _ctf_array_encoded
789#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \
790 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
791 if (_user) { \
792 __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \
793 } else { \
794 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \
795 }
796
797#if (__BYTE_ORDER == __LITTLE_ENDIAN)
798#undef _ctf_array_bitfield
799#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
800 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
801 if (_user) { \
802 __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \
803 } else { \
804 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \
805 }
806#else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */
807/*
808 * For big endian, we need to byteswap into little endian.
809 */
810#undef _ctf_array_bitfield
811#define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \
812 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
813 { \
814 size_t _i; \
815 \
816 for (_i = 0; _i < (_length); _i++) { \
817 _type _tmp; \
818 \
819 if (_user) { \
820 if (get_user(_tmp, (_type *) _src + _i)) \
821 _tmp = 0; \
822 } else { \
823 _tmp = ((_type *) _src)[_i]; \
824 } \
825 switch (sizeof(_type)) { \
826 case 1: \
827 break; \
828 case 2: \
829 _tmp = cpu_to_le16(_tmp); \
830 break; \
831 case 4: \
832 _tmp = cpu_to_le32(_tmp); \
833 break; \
834 case 8: \
835 _tmp = cpu_to_le64(_tmp); \
836 break; \
837 default: \
838 BUG_ON(1); \
839 } \
840 __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \
841 } \
842 }
843#endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */
844
845#undef _ctf_sequence_encoded
846#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
847 _src_length, _encoding, _byte_order, _base, _user, _nowrite) \
848 { \
849 _length_type __tmpl = this_cpu_ptr(&lttng_dynamic_len_stack)->stack[__dynamic_len_idx]; \
850 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
851 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
852 } \
853 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
854 if (_user) { \
855 __chan->ops->event_write_from_user(&__ctx, _src, \
856 sizeof(_type) * __get_dynamic_len(dest)); \
857 } else { \
858 __chan->ops->event_write(&__ctx, _src, \
859 sizeof(_type) * __get_dynamic_len(dest)); \
860 }
861
862#if (__BYTE_ORDER == __LITTLE_ENDIAN)
863#undef _ctf_sequence_bitfield
864#define _ctf_sequence_bitfield(_type, _item, _src, \
865 _length_type, _src_length, \
866 _user, _nowrite) \
867 { \
868 _length_type __tmpl = this_cpu_ptr(&lttng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \
869 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
870 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
871 } \
872 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
873 if (_user) { \
874 __chan->ops->event_write_from_user(&__ctx, _src, \
875 sizeof(_type) * __get_dynamic_len(dest)); \
876 } else { \
877 __chan->ops->event_write(&__ctx, _src, \
878 sizeof(_type) * __get_dynamic_len(dest)); \
879 }
880#else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */
881/*
882 * For big endian, we need to byteswap into little endian.
883 */
884#undef _ctf_sequence_bitfield
885#define _ctf_sequence_bitfield(_type, _item, _src, \
886 _length_type, _src_length, \
887 _user, _nowrite) \
888 { \
889 _length_type __tmpl = this_cpu_ptr(&lttng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \
890 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
891 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
892 } \
893 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
894 { \
895 size_t _i, _length; \
896 \
897 _length = __get_dynamic_len(dest); \
898 for (_i = 0; _i < _length; _i++) { \
899 _type _tmp; \
900 \
901 if (_user) { \
902 if (get_user(_tmp, (_type *) _src + _i)) \
903 _tmp = 0; \
904 } else { \
905 _tmp = ((_type *) _src)[_i]; \
906 } \
907 switch (sizeof(_type)) { \
908 case 1: \
909 break; \
910 case 2: \
911 _tmp = cpu_to_le16(_tmp); \
912 break; \
913 case 4: \
914 _tmp = cpu_to_le32(_tmp); \
915 break; \
916 case 8: \
917 _tmp = cpu_to_le64(_tmp); \
918 break; \
919 default: \
920 BUG_ON(1); \
921 } \
922 __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \
923 } \
924 }
925#endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */
926
927#undef _ctf_string
928#define _ctf_string(_item, _src, _user, _nowrite) \
929 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \
930 if (_user) { \
931 __chan->ops->event_strcpy_from_user(&__ctx, _src, \
932 __get_dynamic_len(dest)); \
933 } else { \
934 __chan->ops->event_strcpy(&__ctx, _src, \
935 __get_dynamic_len(dest)); \
936 }
937
938
939#undef ctf_align
940#define ctf_align(_type) \
941 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type));
942
943#undef ctf_custom_field
944#define ctf_custom_field(_type, _item, _code) _code
945
946#undef ctf_custom_code
947#define ctf_custom_code(...) \
948 { \
949 __VA_ARGS__ \
950 }
951
952/* Beware: this get len actually consumes the len value */
953#undef __get_dynamic_len
954#define __get_dynamic_len(field) this_cpu_ptr(&lttng_dynamic_len_stack)->stack[__dynamic_len_idx++]
955
956#undef TP_PROTO
957#define TP_PROTO(...) __VA_ARGS__
958
959#undef TP_ARGS
960#define TP_ARGS(...) __VA_ARGS__
961
962#undef TP_FIELDS
963#define TP_FIELDS(...) __VA_ARGS__
964
965#undef TP_locvar
966#define TP_locvar(...) __VA_ARGS__
967
968#undef TP_code_pre
969#define TP_code_pre(...) __VA_ARGS__
970
971#undef TP_code_post
972#define TP_code_post(...) __VA_ARGS__
973
974/*
975 * For state dump, check that "session" argument (mandatory) matches the
976 * session this event belongs to. Ensures that we write state dump data only
977 * into the started session, not into all sessions.
978 */
979#ifdef TP_SESSION_CHECK
980#define _TP_SESSION_CHECK(session, csession) (session == csession)
981#else /* TP_SESSION_CHECK */
982#define _TP_SESSION_CHECK(session, csession) 1
983#endif /* TP_SESSION_CHECK */
984
985/*
986 * Using twice size for filter stack data to hold size and pointer for
987 * each field (worse case). For integers, max size required is 64-bit.
988 * Same for double-precision floats. Those fit within
989 * 2*sizeof(unsigned long) for all supported architectures.
990 * Perform UNION (||) of filter runtime list.
991 */
992#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
993#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
994static void __event_probe__##_name(void *__data, _proto) \
995{ \
996 struct probe_local_vars { _locvar }; \
997 struct lttng_event *__event = __data; \
998 struct lttng_probe_ctx __lttng_probe_ctx = { \
999 .event = __event, \
1000 .interruptible = !irqs_disabled(), \
1001 }; \
1002 struct lttng_channel *__chan = __event->chan; \
1003 struct lttng_session *__session = __chan->session; \
1004 struct lib_ring_buffer_ctx __ctx; \
1005 ssize_t __event_len; \
1006 size_t __event_align; \
1007 size_t __orig_dynamic_len_offset, __dynamic_len_idx; \
1008 union { \
1009 size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
1010 char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
1011 } __stackvar; \
1012 int __ret; \
1013 struct probe_local_vars __tp_locvar; \
1014 struct probe_local_vars *tp_locvar __attribute__((unused)) = \
1015 &__tp_locvar; \
1016 struct lttng_pid_tracker *__lpf; \
1017 \
1018 if (!_TP_SESSION_CHECK(session, __session)) \
1019 return; \
1020 if (unlikely(!ACCESS_ONCE(__session->active))) \
1021 return; \
1022 if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
1023 return; \
1024 if (unlikely(!ACCESS_ONCE(__event->enabled))) \
1025 return; \
1026 __lpf = lttng_rcu_dereference(__session->pid_tracker); \
1027 if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
1028 return; \
1029 __orig_dynamic_len_offset = this_cpu_ptr(&lttng_dynamic_len_stack)->offset; \
1030 __dynamic_len_idx = __orig_dynamic_len_offset; \
1031 _code_pre \
1032 if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
1033 struct lttng_bytecode_runtime *bc_runtime; \
1034 int __filter_record = __event->has_enablers_without_bytecode; \
1035 \
1036 __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
1037 tp_locvar, _args); \
1038 lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
1039 if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \
1040 __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
1041 __filter_record = 1; \
1042 } \
1043 if (likely(!__filter_record)) \
1044 goto __post; \
1045 } \
1046 __event_len = __event_get_size__##_name(tp_locvar, _args); \
1047 if (unlikely(__event_len < 0)) { \
1048 lib_ring_buffer_lost_event_too_big(__chan->chan); \
1049 goto __post; \
1050 } \
1051 __event_align = __event_get_align__##_name(tp_locvar, _args); \
1052 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
1053 __event_align, -1); \
1054 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
1055 if (__ret < 0) \
1056 goto __post; \
1057 _fields \
1058 __chan->ops->event_commit(&__ctx); \
1059__post: \
1060 _code_post \
1061 barrier(); /* use before un-reserve. */ \
1062 this_cpu_ptr(&lttng_dynamic_len_stack)->offset = __orig_dynamic_len_offset; \
1063 return; \
1064}
1065
1066#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
1067#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
1068static void __event_probe__##_name(void *__data) \
1069{ \
1070 struct probe_local_vars { _locvar }; \
1071 struct lttng_event *__event = __data; \
1072 struct lttng_probe_ctx __lttng_probe_ctx = { \
1073 .event = __event, \
1074 .interruptible = !irqs_disabled(), \
1075 }; \
1076 struct lttng_channel *__chan = __event->chan; \
1077 struct lttng_session *__session = __chan->session; \
1078 struct lib_ring_buffer_ctx __ctx; \
1079 ssize_t __event_len; \
1080 size_t __event_align; \
1081 size_t __orig_dynamic_len_offset, __dynamic_len_idx; \
1082 union { \
1083 size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
1084 char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
1085 } __stackvar; \
1086 int __ret; \
1087 struct probe_local_vars __tp_locvar; \
1088 struct probe_local_vars *tp_locvar __attribute__((unused)) = \
1089 &__tp_locvar; \
1090 struct lttng_pid_tracker *__lpf; \
1091 \
1092 if (!_TP_SESSION_CHECK(session, __session)) \
1093 return; \
1094 if (unlikely(!ACCESS_ONCE(__session->active))) \
1095 return; \
1096 if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
1097 return; \
1098 if (unlikely(!ACCESS_ONCE(__event->enabled))) \
1099 return; \
1100 __lpf = lttng_rcu_dereference(__session->pid_tracker); \
1101 if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
1102 return; \
1103 __orig_dynamic_len_offset = this_cpu_ptr(&lttng_dynamic_len_stack)->offset; \
1104 __dynamic_len_idx = __orig_dynamic_len_offset; \
1105 _code_pre \
1106 if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
1107 struct lttng_bytecode_runtime *bc_runtime; \
1108 int __filter_record = __event->has_enablers_without_bytecode; \
1109 \
1110 __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
1111 tp_locvar); \
1112 lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
1113 if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \
1114 __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
1115 __filter_record = 1; \
1116 } \
1117 if (likely(!__filter_record)) \
1118 goto __post; \
1119 } \
1120 __event_len = __event_get_size__##_name(tp_locvar); \
1121 if (unlikely(__event_len < 0)) { \
1122 lib_ring_buffer_lost_event_too_big(__chan->chan); \
1123 goto __post; \
1124 } \
1125 __event_align = __event_get_align__##_name(tp_locvar); \
1126 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
1127 __event_align, -1); \
1128 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
1129 if (__ret < 0) \
1130 goto __post; \
1131 _fields \
1132 __chan->ops->event_commit(&__ctx); \
1133__post: \
1134 _code_post \
1135 barrier(); /* use before un-reserve. */ \
1136 this_cpu_ptr(&lttng_dynamic_len_stack)->offset = __orig_dynamic_len_offset; \
1137 return; \
1138}
1139
1140#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
1141
1142#undef __get_dynamic_len
1143
1144/*
1145 * Stage 7 of the trace events.
1146 *
1147 * Create event descriptions.
1148 */
1149
1150/* Named field types must be defined in lttng-types.h */
1151
1152#include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
1153
1154#ifndef TP_PROBE_CB
1155#define TP_PROBE_CB(_template) &__event_probe__##_template
1156#endif
1157
1158#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
1159#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
1160static const struct lttng_event_desc __event_desc___##_map = { \
1161 .fields = __event_fields___##_template, \
1162 .name = #_map, \
1163 .kname = #_name, \
1164 .probe_callback = (void *) TP_PROBE_CB(_template), \
1165 .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
1166 .owner = THIS_MODULE, \
1167};
1168
1169#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
1170#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
1171 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map)
1172
1173#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
1174
1175/*
1176 * Stage 8 of the trace events.
1177 *
1178 * Create an array of event description pointers.
1179 */
1180
1181#include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
1182
1183#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
1184#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
1185 &__event_desc___##_map,
1186
1187#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
1188#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
1189 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map)
1190
1191#define TP_ID1(_token, _system) _token##_system
1192#define TP_ID(_token, _system) TP_ID1(_token, _system)
1193
1194static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = {
1195#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
1196};
1197
1198#undef TP_ID1
1199#undef TP_ID
1200
1201/*
1202 * Stage 9 of the trace events.
1203 *
1204 * Create a toplevel descriptor for the whole probe.
1205 */
1206
1207#define TP_ID1(_token, _system) _token##_system
1208#define TP_ID(_token, _system) TP_ID1(_token, _system)
1209
1210/* non-const because list head will be modified when registered. */
1211static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
1212 .provider = __stringify(TRACE_SYSTEM),
1213 .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM),
1214 .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)),
1215 .head = { NULL, NULL },
1216 .lazy_init_head = { NULL, NULL },
1217 .lazy = 0,
1218};
1219
1220#undef TP_ID1
1221#undef TP_ID
1222
1223/*
1224 * Stage 10 of the trace events.
1225 *
1226 * Register/unregister probes at module load/unload.
1227 */
1228
1229#include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
1230
1231#define TP_ID1(_token, _system) _token##_system
1232#define TP_ID(_token, _system) TP_ID1(_token, _system)
1233#define module_init_eval1(_token, _system) module_init(_token##_system)
1234#define module_init_eval(_token, _system) module_init_eval1(_token, _system)
1235#define module_exit_eval1(_token, _system) module_exit(_token##_system)
1236#define module_exit_eval(_token, _system) module_exit_eval1(_token, _system)
1237
1238#ifndef TP_MODULE_NOINIT
1239static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
1240{
1241 wrapper_vmalloc_sync_all();
1242 return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM));
1243}
1244
1245static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
1246{
1247 lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM));
1248}
1249
1250#ifndef TP_MODULE_NOAUTOLOAD
1251module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
1252module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
1253#endif
1254
1255#endif
1256
1257#undef module_init_eval
1258#undef module_exit_eval
1259#undef TP_ID1
1260#undef TP_ID
1261
1262#undef TP_PROTO
1263#undef TP_ARGS
LTTng 2.0/0.x modules
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