4 * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
5 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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
21 #include <linux/uaccess.h>
22 #include <linux/debugfs.h>
24 #include "lttng-types.h"
25 #include "lttng-probe-user.h"
26 #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
27 #include "../wrapper/ringbuffer/frontend_types.h"
28 #include "../lttng-events.h"
29 #include "../lttng-tracer-core.h"
32 * Macro declarations used for all stages.
36 * LTTng name mapping macros. LTTng remaps some of the kernel events to
37 * enforce name-spacing.
39 #undef TRACE_EVENT_MAP
40 #define TRACE_EVENT_MAP(name, map, proto, args, tstruct, assign, print) \
41 DECLARE_EVENT_CLASS(map, \
47 DEFINE_EVENT_MAP(map, name, map, PARAMS(proto), PARAMS(args))
49 #undef TRACE_EVENT_MAP_NOARGS
50 #define TRACE_EVENT_MAP_NOARGS(name, map, tstruct, assign, print) \
51 DECLARE_EVENT_CLASS_NOARGS(map, \
55 DEFINE_EVENT_MAP_NOARGS(map, name, map)
57 #undef DEFINE_EVENT_PRINT_MAP
58 #define DEFINE_EVENT_PRINT_MAP(template, name, map, proto, args, print) \
59 DEFINE_EVENT_MAP(template, name, map, PARAMS(proto), PARAMS(args))
61 /* Callbacks are meaningless to LTTng. */
62 #undef TRACE_EVENT_FN_MAP
63 #define TRACE_EVENT_FN_MAP(name, map, proto, args, tstruct, \
64 assign, print, reg, unreg) \
65 TRACE_EVENT_MAP(name, map, PARAMS(proto), PARAMS(args), \
66 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
68 #undef TRACE_EVENT_CONDITION_MAP
69 #define TRACE_EVENT_CONDITION_MAP(name, map, proto, args, cond, tstruct, assign, print) \
70 TRACE_EVENT_MAP(name, map, \
78 * DECLARE_EVENT_CLASS can be used to add a generic function
79 * handlers for events. That is, if all events have the same
80 * parameters and just have distinct trace points.
81 * Each tracepoint can be defined with DEFINE_EVENT and that
82 * will map the DECLARE_EVENT_CLASS to the tracepoint.
84 * TRACE_EVENT is a one to one mapping between tracepoint and template.
88 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
89 TRACE_EVENT_MAP(name, name, \
96 #undef TRACE_EVENT_NOARGS
97 #define TRACE_EVENT_NOARGS(name, tstruct, assign, print) \
98 TRACE_EVENT_MAP_NOARGS(name, name, \
103 #undef DEFINE_EVENT_PRINT
104 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
105 DEFINE_EVENT_PRINT_MAP(template, name, name, \
106 PARAMS(proto), PARAMS(args), PARAMS(print_))
108 #undef TRACE_EVENT_FN
109 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
110 assign, print, reg, unreg) \
111 TRACE_EVENT_FN_MAP(name, name, PARAMS(proto), PARAMS(args), \
112 PARAMS(tstruct), PARAMS(assign), PARAMS(print), \
113 PARAMS(reg), PARAMS(unreg)) \
116 #define DEFINE_EVENT(template, name, proto, args) \
117 DEFINE_EVENT_MAP(template, name, name, PARAMS(proto), PARAMS(args))
119 #undef DEFINE_EVENT_NOARGS
120 #define DEFINE_EVENT_NOARGS(template, name) \
121 DEFINE_EVENT_MAP_NOARGS(template, name, name)
123 #undef TRACE_EVENT_CONDITION
124 #define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
125 TRACE_EVENT_CONDITION_MAP(name, name, \
134 * Stage 1 of the trace events.
136 * Create dummy trace calls for each events, verifying that the LTTng module
137 * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the
141 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
144 #define TP_PROTO(args...) args
147 #define TP_ARGS(args...) args
149 #undef DEFINE_EVENT_MAP
150 #define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \
151 void trace_##_name(_proto);
153 #undef DEFINE_EVENT_MAP_NOARGS
154 #define DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) \
155 void trace_##_name(void *__data);
157 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
160 * Stage 2 of the trace events.
162 * Create event field type metadata section.
163 * Each event produce an array of fields.
166 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
168 /* Named field types must be defined in lttng-types.h */
171 #define __field_full(_type, _item, _order, _base) \
174 .type = __type_integer(_type, _order, _base, none), \
178 #define __field(_type, _item) \
179 __field_full(_type, _item, __BYTE_ORDER, 10)
182 #define __field_ext(_type, _item, _filter_type) \
183 __field(_type, _item)
186 #define __field_hex(_type, _item) \
187 __field_full(_type, _item, __BYTE_ORDER, 16)
189 #undef __field_network
190 #define __field_network(_type, _item) \
191 __field_full(_type, _item, __BIG_ENDIAN, 10)
193 #undef __field_network_hex
194 #define __field_network_hex(_type, _item) \
195 __field_full(_type, _item, __BIG_ENDIAN, 16)
197 #undef __array_enc_ext
198 #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
203 .atype = atype_array, \
207 .elem_type = __type_integer(_type, _order, _base, _encoding), \
213 #define __array(_type, _item, _length) \
214 __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none)
217 #define __array_text(_type, _item, _length) \
218 __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8)
221 #define __array_hex(_type, _item, _length) \
222 __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none)
224 #undef __dynamic_array_enc_ext
225 #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
230 .atype = atype_sequence, \
233 .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \
234 .elem_type = __type_integer(_type, _order, _base, _encoding), \
239 #undef __dynamic_array_enc_ext_2
240 #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding) \
241 __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding)
243 #undef __dynamic_array
244 #define __dynamic_array(_type, _item, _length) \
245 __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none)
247 #undef __dynamic_array_text
248 #define __dynamic_array_text(_type, _item, _length) \
249 __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8)
251 #undef __dynamic_array_hex
252 #define __dynamic_array_hex(_type, _item, _length) \
253 __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none)
255 #undef __dynamic_array_text_2
256 #define __dynamic_array_text_2(_type, _item, _length1, _length2) \
257 __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, __BYTE_ORDER, 10, UTF8)
260 #define __string(_item, _src) \
265 .atype = atype_string, \
266 .u.basic.string.encoding = lttng_encode_UTF8, \
270 #undef __string_from_user
271 #define __string_from_user(_item, _src) \
272 __string(_item, _src)
274 #undef TP_STRUCT__entry
275 #define TP_STRUCT__entry(args...) args /* Only one used in this phase */
277 #undef DECLARE_EVENT_CLASS_NOARGS
278 #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \
279 static const struct lttng_event_field __event_fields___##_name[] = { \
283 #undef DECLARE_EVENT_CLASS
284 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
285 DECLARE_EVENT_CLASS_NOARGS(_name, PARAMS(_tstruct), PARAMS(_assign), \
288 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
291 * Stage 3 of the trace events.
293 * Create probe callback prototypes.
296 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
299 #define TP_PROTO(args...) args
301 #undef DECLARE_EVENT_CLASS
302 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
303 static void __event_probe__##_name(void *__data, _proto);
305 #undef DECLARE_EVENT_CLASS_NOARGS
306 #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \
307 static void __event_probe__##_name(void *__data);
309 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
312 * Stage 3.9 of the trace events.
314 * Create event descriptions.
317 /* Named field types must be defined in lttng-types.h */
319 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
322 #define TP_PROBE_CB(_template) &__event_probe__##_template
325 #undef DEFINE_EVENT_MAP_NOARGS
326 #define DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) \
327 static const struct lttng_event_desc __event_desc___##_map = { \
328 .fields = __event_fields___##_template, \
331 .probe_callback = (void *) TP_PROBE_CB(_template), \
332 .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
333 .owner = THIS_MODULE, \
336 #undef DEFINE_EVENT_MAP
337 #define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \
338 DEFINE_EVENT_MAP_NOARGS(_template, _name, _map)
340 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
344 * Stage 4 of the trace events.
346 * Create an array of event description pointers.
349 /* Named field types must be defined in lttng-types.h */
351 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
353 #undef DEFINE_EVENT_MAP_NOARGS
354 #define DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) \
355 &__event_desc___##_map,
357 #undef DEFINE_EVENT_MAP
358 #define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \
359 DEFINE_EVENT_MAP_NOARGS(_template, _name, _map)
361 #define TP_ID1(_token, _system) _token##_system
362 #define TP_ID(_token, _system) TP_ID1(_token, _system)
364 static const struct lttng_event_desc
*TP_ID(__event_desc___
, TRACE_SYSTEM
)[] = {
365 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
373 * Stage 5 of the trace events.
375 * Create a toplevel descriptor for the whole probe.
378 #define TP_ID1(_token, _system) _token##_system
379 #define TP_ID(_token, _system) TP_ID1(_token, _system)
381 /* non-const because list head will be modified when registered. */
382 static __used
struct lttng_probe_desc
TP_ID(__probe_desc___
, TRACE_SYSTEM
) = {
383 .event_desc
= TP_ID(__event_desc___
, TRACE_SYSTEM
),
384 .nr_events
= ARRAY_SIZE(TP_ID(__event_desc___
, TRACE_SYSTEM
)),
391 * Stage 6 of the trace events.
393 * Create static inline function that calculates event size.
396 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
398 /* Named field types must be defined in lttng-types.h */
401 #define __field_full(_type, _item, _order, _base) \
402 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
403 __event_len += sizeof(_type);
405 #undef __array_enc_ext
406 #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
407 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
408 __event_len += sizeof(_type) * (_length);
410 #undef __dynamic_array_enc_ext
411 #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
412 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \
413 __event_len += sizeof(u32); \
414 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
415 __dynamic_len[__dynamic_len_idx] = (_length); \
416 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
419 #undef __dynamic_array_enc_ext_2
420 #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\
421 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \
422 __event_len += sizeof(u32); \
423 __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
424 __dynamic_len[__dynamic_len_idx] = (_length1); \
425 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
426 __dynamic_len_idx++; \
427 __dynamic_len[__dynamic_len_idx] = (_length2); \
428 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
432 #define __string(_item, _src) \
433 __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
436 * strlen_user includes \0. If returns 0, it faulted, so we set size to
439 #undef __string_from_user
440 #define __string_from_user(_item, _src) \
441 __event_len += __dynamic_len[__dynamic_len_idx++] = \
442 max_t(size_t, lttng_strlen_user_inatomic(_src), 1);
445 #define TP_PROTO(args...) args
447 #undef TP_STRUCT__entry
448 #define TP_STRUCT__entry(args...) args
450 #undef DECLARE_EVENT_CLASS
451 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
452 static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
454 size_t __event_len = 0; \
455 unsigned int __dynamic_len_idx = 0; \
458 (void) __dynamic_len_idx; /* don't warn if unused */ \
460 return __event_len; \
463 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
466 * Stage 7 of the trace events.
468 * Create static inline function that calculates event payload alignment.
471 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
473 /* Named field types must be defined in lttng-types.h */
476 #define __field_full(_type, _item, _order, _base) \
477 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
479 #undef __array_enc_ext
480 #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
481 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
483 #undef __dynamic_array_enc_ext
484 #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
485 __event_align = max_t(size_t, __event_align, lttng_alignof(u32)); \
486 __event_align = max_t(size_t, __event_align, lttng_alignof(_type));
488 #undef __dynamic_array_enc_ext_2
489 #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\
490 __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding)
493 #define __string(_item, _src)
495 #undef __string_from_user
496 #define __string_from_user(_item, _src)
499 #define TP_PROTO(args...) args
501 #undef TP_STRUCT__entry
502 #define TP_STRUCT__entry(args...) args
504 #undef DECLARE_EVENT_CLASS
505 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
506 static inline size_t __event_get_align__##_name(_proto) \
508 size_t __event_align = 1; \
510 return __event_align; \
513 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
517 * Stage 8 of the trace events.
519 * Create structure declaration that allows the "assign" macros to access the
523 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
525 /* Named field types must be defined in lttng-types.h */
528 #define __field_full(_type, _item, _order, _base) _type _item;
530 #undef __array_enc_ext
531 #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
534 #undef __dynamic_array_enc_ext
535 #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
538 #undef __dynamic_array_enc_ext_2
539 #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\
540 __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding)
543 #define __string(_item, _src) char _item;
545 #undef __string_from_user
546 #define __string_from_user(_item, _src) \
547 __string(_item, _src)
549 #undef TP_STRUCT__entry
550 #define TP_STRUCT__entry(args...) args
552 #undef DECLARE_EVENT_CLASS
553 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
554 struct __event_typemap__##_name { \
558 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
562 * Stage 9 of the trace events.
564 * Create the probe function : call even size calculation and write event data
567 * We use both the field and assignment macros to write the fields in the order
568 * defined in the field declaration. The field declarations control the
569 * execution order, jumping to the appropriate assignment block.
572 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
575 #define __field_full(_type, _item, _order, _base) \
576 goto __assign_##_item; \
579 #undef __array_enc_ext
580 #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
581 goto __assign_##_item; \
584 #undef __dynamic_array_enc_ext
585 #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
586 goto __assign_##_item##_1; \
587 __end_field_##_item##_1: \
588 goto __assign_##_item##_2; \
589 __end_field_##_item##_2:
591 #undef __dynamic_array_enc_ext_2
592 #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\
593 goto __assign_##_item##_1; \
594 __end_field_##_item##_1: \
595 goto __assign_##_item##_2; \
596 __end_field_##_item##_2: \
597 goto __assign_##_item##_3; \
598 __end_field_##_item##_3:
601 #define __string(_item, _src) \
602 goto __assign_##_item; \
605 #undef __string_from_user
606 #define __string_from_user(_item, _src) \
607 __string(_item, _src)
610 * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
614 #define tp_assign(dest, src) \
617 __typeof__(__typemap.dest) __tmp = (src); \
618 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp)); \
619 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
621 goto __end_field_##dest;
623 /* fixed length array memcpy */
625 #define tp_memcpy_gen(write_ops, dest, src, len) \
628 (void) __typemap.dest; \
629 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
630 __chan->ops->write_ops(&__ctx, src, len); \
631 goto __end_field_##dest;
634 #define tp_memcpy(dest, src, len) \
635 tp_memcpy_gen(event_write, dest, src, len)
637 #undef tp_memcpy_from_user
638 #define tp_memcpy_from_user(dest, src, len) \
639 tp_memcpy_gen(event_write_from_user, dest, src, len)
641 /* variable length sequence memcpy */
642 #undef tp_memcpy_dyn_gen
643 #define tp_memcpy_dyn_gen(write_ops, dest, src) \
644 __assign_##dest##_1: \
646 u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \
647 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \
648 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \
650 goto __end_field_##dest##_1; \
651 __assign_##dest##_2: \
652 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
653 __chan->ops->write_ops(&__ctx, src, \
654 sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
655 goto __end_field_##dest##_2;
657 #undef tp_memcpy_dyn_gen_2
658 #define tp_memcpy_dyn_gen_2(write_ops, dest, src1, src2) \
659 __assign_##dest##_1: \
661 u32 __tmpl = __dynamic_len[__dynamic_len_idx] \
662 + __dynamic_len[__dynamic_len_idx + 1]; \
663 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \
664 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \
666 goto __end_field_##dest##_1; \
667 __assign_##dest##_2: \
668 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \
669 __chan->ops->write_ops(&__ctx, src1, \
670 sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
671 goto __end_field_##dest##_2; \
672 __assign_##dest##_3: \
673 __chan->ops->write_ops(&__ctx, src2, \
674 sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
675 goto __end_field_##dest##_3;
678 #define tp_memcpy_dyn(dest, src) \
679 tp_memcpy_dyn_gen(event_write, dest, src)
681 #undef tp_memcpy_dyn_2
682 #define tp_memcpy_dyn_2(dest, src1, src2) \
683 tp_memcpy_dyn_gen_2(event_write, dest, src1, src2)
685 #undef tp_memcpy_dyn_from_user
686 #define tp_memcpy_dyn_from_user(dest, src) \
687 tp_memcpy_dyn_gen(event_write_from_user, dest, src)
690 * The string length including the final \0.
692 #undef tp_copy_string_from_user
693 #define tp_copy_string_from_user(dest, src) \
699 (void) __typemap.dest; \
700 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest));\
701 __ustrlen = __get_dynamic_array_len(dest); \
702 if (likely(__ustrlen > 1)) { \
703 __chan->ops->event_write_from_user(&__ctx, src, \
706 __chan->ops->event_memset(&__ctx, 0, 1); \
708 goto __end_field_##dest;
710 #define tp_strcpy(dest, src) \
711 tp_memcpy(dest, src, __get_dynamic_array_len(dest))
713 /* Named field types must be defined in lttng-types.h */
716 #define __get_str(field) field
718 #undef __get_dynamic_array
719 #define __get_dynamic_array(field) field
721 /* Beware: this get len actually consumes the len value */
722 #undef __get_dynamic_array_len
723 #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++]
726 #define TP_PROTO(args...) args
729 #define TP_ARGS(args...) args
731 #undef TP_STRUCT__entry
732 #define TP_STRUCT__entry(args...) args
734 #undef TP_fast_assign
735 #define TP_fast_assign(args...) args
738 * For state dump, check that "session" argument (mandatory) matches the
739 * session this event belongs to. Ensures that we write state dump data only
740 * into the started session, not into all sessions.
742 #ifdef TP_SESSION_CHECK
743 #define _TP_SESSION_CHECK(session, csession) (session == csession)
744 #else /* TP_SESSION_CHECK */
745 #define _TP_SESSION_CHECK(session, csession) 1
746 #endif /* TP_SESSION_CHECK */
749 * __dynamic_len array length is twice the number of fields due to
750 * __dynamic_array_enc_ext_2() and tp_memcpy_dyn_2(), which are the
751 * worse case, needing 2 entries per field.
753 #undef DECLARE_EVENT_CLASS
754 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
755 static void __event_probe__##_name(void *__data, _proto) \
757 struct lttng_event *__event = __data; \
758 struct lttng_channel *__chan = __event->chan; \
759 struct lib_ring_buffer_ctx __ctx; \
760 size_t __event_len, __event_align; \
761 size_t __dynamic_len_idx = 0; \
762 size_t __dynamic_len[2 * ARRAY_SIZE(__event_fields___##_name)]; \
763 struct __event_typemap__##_name __typemap; \
767 (void) __dynamic_len_idx; /* don't warn if unused */ \
768 (void) __typemap; /* don't warn if unused */ \
770 if (!_TP_SESSION_CHECK(session, __chan->session)) \
772 if (unlikely(!ACCESS_ONCE(__chan->session->active))) \
774 if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
776 if (unlikely(!ACCESS_ONCE(__event->enabled))) \
778 __event_len = __event_get_size__##_name(__dynamic_len, _args); \
779 __event_align = __event_get_align__##_name(_args); \
780 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
781 __event_align, -1); \
782 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
785 /* Control code (field ordering) */ \
787 __chan->ops->event_commit(&__ctx); \
789 /* Copy code, steered by control code */ \
793 #undef DECLARE_EVENT_CLASS_NOARGS
794 #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \
795 static void __event_probe__##_name(void *__data) \
797 struct lttng_event *__event = __data; \
798 struct lttng_channel *__chan = __event->chan; \
799 struct lib_ring_buffer_ctx __ctx; \
800 size_t __event_len, __event_align; \
803 if (!_TP_SESSION_CHECK(session, __chan->session)) \
805 if (unlikely(!ACCESS_ONCE(__chan->session->active))) \
807 if (unlikely(!ACCESS_ONCE(__chan->enabled))) \
809 if (unlikely(!ACCESS_ONCE(__event->enabled))) \
813 lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
814 __event_align, -1); \
815 __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
818 /* Control code (field ordering) */ \
820 __chan->ops->event_commit(&__ctx); \
822 /* Copy code, steered by control code */ \
826 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
829 * Stage 10 of the trace events.
831 * Register/unregister probes at module load/unload.
834 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
836 #define TP_ID1(_token, _system) _token##_system
837 #define TP_ID(_token, _system) TP_ID1(_token, _system)
838 #define module_init_eval1(_token, _system) module_init(_token##_system)
839 #define module_init_eval(_token, _system) module_init_eval1(_token, _system)
840 #define module_exit_eval1(_token, _system) module_exit(_token##_system)
841 #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system)
843 #ifndef TP_MODULE_NOINIT
844 static int TP_ID(__lttng_events_init__
, TRACE_SYSTEM
)(void)
846 wrapper_vmalloc_sync_all();
847 return lttng_probe_register(&TP_ID(__probe_desc___
, TRACE_SYSTEM
));
850 static void TP_ID(__lttng_events_exit__
, TRACE_SYSTEM
)(void)
852 lttng_probe_unregister(&TP_ID(__probe_desc___
, TRACE_SYSTEM
));
855 #ifndef TP_MODULE_NOAUTOLOAD
856 module_init_eval(__lttng_events_init__
, TRACE_SYSTEM
);
857 module_exit_eval(__lttng_events_exit__
, TRACE_SYSTEM
);
862 #undef module_init_eval
863 #undef module_exit_eval
869 #undef TRACE_EVENT_FLAGS
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