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Merge branch 'for-2.6.38/event-handling' into for-2.6.38/core
[mirror_ubuntu-zesty-kernel.git] / include / trace / ftrace.h
1 /*
2 * Stage 1 of the trace events.
3 *
4 * Override the macros in <trace/trace_events.h> to include the following:
5 *
6 * struct ftrace_raw_<call> {
7 * struct trace_entry ent;
8 * <type> <item>;
9 * <type2> <item2>[<len>];
10 * [...]
11 * };
12 *
13 * The <type> <item> is created by the __field(type, item) macro or
14 * the __array(type2, item2, len) macro.
15 * We simply do "type item;", and that will create the fields
16 * in the structure.
17 */
18
19 #include <linux/ftrace_event.h>
20
21 /*
22 * DECLARE_EVENT_CLASS can be used to add a generic function
23 * handlers for events. That is, if all events have the same
24 * parameters and just have distinct trace points.
25 * Each tracepoint can be defined with DEFINE_EVENT and that
26 * will map the DECLARE_EVENT_CLASS to the tracepoint.
27 *
28 * TRACE_EVENT is a one to one mapping between tracepoint and template.
29 */
30 #undef TRACE_EVENT
31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
32 DECLARE_EVENT_CLASS(name, \
33 PARAMS(proto), \
34 PARAMS(args), \
35 PARAMS(tstruct), \
36 PARAMS(assign), \
37 PARAMS(print)); \
38 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
39
40
41 #undef __field
42 #define __field(type, item) type item;
43
44 #undef __field_ext
45 #define __field_ext(type, item, filter_type) type item;
46
47 #undef __array
48 #define __array(type, item, len) type item[len];
49
50 #undef __dynamic_array
51 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
52
53 #undef __string
54 #define __string(item, src) __dynamic_array(char, item, -1)
55
56 #undef TP_STRUCT__entry
57 #define TP_STRUCT__entry(args...) args
58
59 #undef DECLARE_EVENT_CLASS
60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
61 struct ftrace_raw_##name { \
62 struct trace_entry ent; \
63 tstruct \
64 char __data[0]; \
65 }; \
66 \
67 static struct ftrace_event_class event_class_##name;
68
69 #undef DEFINE_EVENT
70 #define DEFINE_EVENT(template, name, proto, args) \
71 static struct ftrace_event_call __used \
72 __attribute__((__aligned__(4))) event_##name
73
74 #undef DEFINE_EVENT_PRINT
75 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
76 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
77
78 /* Callbacks are meaningless to ftrace. */
79 #undef TRACE_EVENT_FN
80 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
81 assign, print, reg, unreg) \
82 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
83 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
84
85 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
86
87
88 /*
89 * Stage 2 of the trace events.
90 *
91 * Include the following:
92 *
93 * struct ftrace_data_offsets_<call> {
94 * u32 <item1>;
95 * u32 <item2>;
96 * [...]
97 * };
98 *
99 * The __dynamic_array() macro will create each u32 <item>, this is
100 * to keep the offset of each array from the beginning of the event.
101 * The size of an array is also encoded, in the higher 16 bits of <item>.
102 */
103
104 #undef __field
105 #define __field(type, item)
106
107 #undef __field_ext
108 #define __field_ext(type, item, filter_type)
109
110 #undef __array
111 #define __array(type, item, len)
112
113 #undef __dynamic_array
114 #define __dynamic_array(type, item, len) u32 item;
115
116 #undef __string
117 #define __string(item, src) __dynamic_array(char, item, -1)
118
119 #undef DECLARE_EVENT_CLASS
120 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
121 struct ftrace_data_offsets_##call { \
122 tstruct; \
123 };
124
125 #undef DEFINE_EVENT
126 #define DEFINE_EVENT(template, name, proto, args)
127
128 #undef DEFINE_EVENT_PRINT
129 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
130 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
131
132 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
133
134 /*
135 * Stage 3 of the trace events.
136 *
137 * Override the macros in <trace/trace_events.h> to include the following:
138 *
139 * enum print_line_t
140 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
141 * {
142 * struct trace_seq *s = &iter->seq;
143 * struct ftrace_raw_<call> *field; <-- defined in stage 1
144 * struct trace_entry *entry;
145 * struct trace_seq *p = &iter->tmp_seq;
146 * int ret;
147 *
148 * entry = iter->ent;
149 *
150 * if (entry->type != event_<call>->event.type) {
151 * WARN_ON_ONCE(1);
152 * return TRACE_TYPE_UNHANDLED;
153 * }
154 *
155 * field = (typeof(field))entry;
156 *
157 * trace_seq_init(p);
158 * ret = trace_seq_printf(s, "%s: ", <call>);
159 * if (ret)
160 * ret = trace_seq_printf(s, <TP_printk> "\n");
161 * if (!ret)
162 * return TRACE_TYPE_PARTIAL_LINE;
163 *
164 * return TRACE_TYPE_HANDLED;
165 * }
166 *
167 * This is the method used to print the raw event to the trace
168 * output format. Note, this is not needed if the data is read
169 * in binary.
170 */
171
172 #undef __entry
173 #define __entry field
174
175 #undef TP_printk
176 #define TP_printk(fmt, args...) fmt "\n", args
177
178 #undef __get_dynamic_array
179 #define __get_dynamic_array(field) \
180 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
181
182 #undef __get_str
183 #define __get_str(field) (char *)__get_dynamic_array(field)
184
185 #undef __print_flags
186 #define __print_flags(flag, delim, flag_array...) \
187 ({ \
188 static const struct trace_print_flags __flags[] = \
189 { flag_array, { -1, NULL }}; \
190 ftrace_print_flags_seq(p, delim, flag, __flags); \
191 })
192
193 #undef __print_symbolic
194 #define __print_symbolic(value, symbol_array...) \
195 ({ \
196 static const struct trace_print_flags symbols[] = \
197 { symbol_array, { -1, NULL }}; \
198 ftrace_print_symbols_seq(p, value, symbols); \
199 })
200
201 #undef __print_hex
202 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
203
204 #undef DECLARE_EVENT_CLASS
205 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
206 static notrace enum print_line_t \
207 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
208 struct trace_event *trace_event) \
209 { \
210 struct ftrace_event_call *event; \
211 struct trace_seq *s = &iter->seq; \
212 struct ftrace_raw_##call *field; \
213 struct trace_entry *entry; \
214 struct trace_seq *p = &iter->tmp_seq; \
215 int ret; \
216 \
217 event = container_of(trace_event, struct ftrace_event_call, \
218 event); \
219 \
220 entry = iter->ent; \
221 \
222 if (entry->type != event->event.type) { \
223 WARN_ON_ONCE(1); \
224 return TRACE_TYPE_UNHANDLED; \
225 } \
226 \
227 field = (typeof(field))entry; \
228 \
229 trace_seq_init(p); \
230 ret = trace_seq_printf(s, "%s: ", event->name); \
231 if (ret) \
232 ret = trace_seq_printf(s, print); \
233 if (!ret) \
234 return TRACE_TYPE_PARTIAL_LINE; \
235 \
236 return TRACE_TYPE_HANDLED; \
237 } \
238 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
239 .trace = ftrace_raw_output_##call, \
240 };
241
242 #undef DEFINE_EVENT_PRINT
243 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
244 static notrace enum print_line_t \
245 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
246 struct trace_event *event) \
247 { \
248 struct trace_seq *s = &iter->seq; \
249 struct ftrace_raw_##template *field; \
250 struct trace_entry *entry; \
251 struct trace_seq *p = &iter->tmp_seq; \
252 int ret; \
253 \
254 entry = iter->ent; \
255 \
256 if (entry->type != event_##call.event.type) { \
257 WARN_ON_ONCE(1); \
258 return TRACE_TYPE_UNHANDLED; \
259 } \
260 \
261 field = (typeof(field))entry; \
262 \
263 trace_seq_init(p); \
264 ret = trace_seq_printf(s, "%s: ", #call); \
265 if (ret) \
266 ret = trace_seq_printf(s, print); \
267 if (!ret) \
268 return TRACE_TYPE_PARTIAL_LINE; \
269 \
270 return TRACE_TYPE_HANDLED; \
271 } \
272 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
273 .trace = ftrace_raw_output_##call, \
274 };
275
276 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
277
278 #undef __field_ext
279 #define __field_ext(type, item, filter_type) \
280 ret = trace_define_field(event_call, #type, #item, \
281 offsetof(typeof(field), item), \
282 sizeof(field.item), \
283 is_signed_type(type), filter_type); \
284 if (ret) \
285 return ret;
286
287 #undef __field
288 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
289
290 #undef __array
291 #define __array(type, item, len) \
292 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
293 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
294 offsetof(typeof(field), item), \
295 sizeof(field.item), \
296 is_signed_type(type), FILTER_OTHER); \
297 if (ret) \
298 return ret;
299
300 #undef __dynamic_array
301 #define __dynamic_array(type, item, len) \
302 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
303 offsetof(typeof(field), __data_loc_##item), \
304 sizeof(field.__data_loc_##item), \
305 is_signed_type(type), FILTER_OTHER);
306
307 #undef __string
308 #define __string(item, src) __dynamic_array(char, item, -1)
309
310 #undef DECLARE_EVENT_CLASS
311 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
312 static int notrace \
313 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
314 { \
315 struct ftrace_raw_##call field; \
316 int ret; \
317 \
318 tstruct; \
319 \
320 return ret; \
321 }
322
323 #undef DEFINE_EVENT
324 #define DEFINE_EVENT(template, name, proto, args)
325
326 #undef DEFINE_EVENT_PRINT
327 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
328 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
329
330 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
331
332 /*
333 * remember the offset of each array from the beginning of the event.
334 */
335
336 #undef __entry
337 #define __entry entry
338
339 #undef __field
340 #define __field(type, item)
341
342 #undef __field_ext
343 #define __field_ext(type, item, filter_type)
344
345 #undef __array
346 #define __array(type, item, len)
347
348 #undef __dynamic_array
349 #define __dynamic_array(type, item, len) \
350 __data_offsets->item = __data_size + \
351 offsetof(typeof(*entry), __data); \
352 __data_offsets->item |= (len * sizeof(type)) << 16; \
353 __data_size += (len) * sizeof(type);
354
355 #undef __string
356 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
357
358 #undef DECLARE_EVENT_CLASS
359 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
360 static inline notrace int ftrace_get_offsets_##call( \
361 struct ftrace_data_offsets_##call *__data_offsets, proto) \
362 { \
363 int __data_size = 0; \
364 struct ftrace_raw_##call __maybe_unused *entry; \
365 \
366 tstruct; \
367 \
368 return __data_size; \
369 }
370
371 #undef DEFINE_EVENT
372 #define DEFINE_EVENT(template, name, proto, args)
373
374 #undef DEFINE_EVENT_PRINT
375 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
376 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
377
378 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
379
380 /*
381 * Stage 4 of the trace events.
382 *
383 * Override the macros in <trace/trace_events.h> to include the following:
384 *
385 * For those macros defined with TRACE_EVENT:
386 *
387 * static struct ftrace_event_call event_<call>;
388 *
389 * static void ftrace_raw_event_<call>(void *__data, proto)
390 * {
391 * struct ftrace_event_call *event_call = __data;
392 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
393 * struct ring_buffer_event *event;
394 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
395 * struct ring_buffer *buffer;
396 * unsigned long irq_flags;
397 * int __data_size;
398 * int pc;
399 *
400 * local_save_flags(irq_flags);
401 * pc = preempt_count();
402 *
403 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
404 *
405 * event = trace_current_buffer_lock_reserve(&buffer,
406 * event_<call>->event.type,
407 * sizeof(*entry) + __data_size,
408 * irq_flags, pc);
409 * if (!event)
410 * return;
411 * entry = ring_buffer_event_data(event);
412 *
413 * { <assign>; } <-- Here we assign the entries by the __field and
414 * __array macros.
415 *
416 * if (!filter_current_check_discard(buffer, event_call, entry, event))
417 * trace_current_buffer_unlock_commit(buffer,
418 * event, irq_flags, pc);
419 * }
420 *
421 * static struct trace_event ftrace_event_type_<call> = {
422 * .trace = ftrace_raw_output_<call>, <-- stage 2
423 * };
424 *
425 * static const char print_fmt_<call>[] = <TP_printk>;
426 *
427 * static struct ftrace_event_class __used event_class_<template> = {
428 * .system = "<system>",
429 * .define_fields = ftrace_define_fields_<call>,
430 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
431 * .raw_init = trace_event_raw_init,
432 * .probe = ftrace_raw_event_##call,
433 * .reg = ftrace_event_reg,
434 * };
435 *
436 * static struct ftrace_event_call __used
437 * __attribute__((__aligned__(4)))
438 * __attribute__((section("_ftrace_events"))) event_<call> = {
439 * .name = "<call>",
440 * .class = event_class_<template>,
441 * .event = &ftrace_event_type_<call>,
442 * .print_fmt = print_fmt_<call>,
443 * };
444 *
445 */
446
447 #ifdef CONFIG_PERF_EVENTS
448
449 #define _TRACE_PERF_PROTO(call, proto) \
450 static notrace void \
451 perf_trace_##call(void *__data, proto);
452
453 #define _TRACE_PERF_INIT(call) \
454 .perf_probe = perf_trace_##call,
455
456 #else
457 #define _TRACE_PERF_PROTO(call, proto)
458 #define _TRACE_PERF_INIT(call)
459 #endif /* CONFIG_PERF_EVENTS */
460
461 #undef __entry
462 #define __entry entry
463
464 #undef __field
465 #define __field(type, item)
466
467 #undef __array
468 #define __array(type, item, len)
469
470 #undef __dynamic_array
471 #define __dynamic_array(type, item, len) \
472 __entry->__data_loc_##item = __data_offsets.item;
473
474 #undef __string
475 #define __string(item, src) __dynamic_array(char, item, -1) \
476
477 #undef __assign_str
478 #define __assign_str(dst, src) \
479 strcpy(__get_str(dst), src);
480
481 #undef TP_fast_assign
482 #define TP_fast_assign(args...) args
483
484 #undef TP_perf_assign
485 #define TP_perf_assign(args...)
486
487 #undef DECLARE_EVENT_CLASS
488 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
489 \
490 static notrace void \
491 ftrace_raw_event_##call(void *__data, proto) \
492 { \
493 struct ftrace_event_call *event_call = __data; \
494 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
495 struct ring_buffer_event *event; \
496 struct ftrace_raw_##call *entry; \
497 struct ring_buffer *buffer; \
498 unsigned long irq_flags; \
499 int __data_size; \
500 int pc; \
501 \
502 local_save_flags(irq_flags); \
503 pc = preempt_count(); \
504 \
505 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
506 \
507 event = trace_current_buffer_lock_reserve(&buffer, \
508 event_call->event.type, \
509 sizeof(*entry) + __data_size, \
510 irq_flags, pc); \
511 if (!event) \
512 return; \
513 entry = ring_buffer_event_data(event); \
514 \
515 tstruct \
516 \
517 { assign; } \
518 \
519 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
520 trace_nowake_buffer_unlock_commit(buffer, \
521 event, irq_flags, pc); \
522 }
523 /*
524 * The ftrace_test_probe is compiled out, it is only here as a build time check
525 * to make sure that if the tracepoint handling changes, the ftrace probe will
526 * fail to compile unless it too is updated.
527 */
528
529 #undef DEFINE_EVENT
530 #define DEFINE_EVENT(template, call, proto, args) \
531 static inline void ftrace_test_probe_##call(void) \
532 { \
533 check_trace_callback_type_##call(ftrace_raw_event_##template); \
534 }
535
536 #undef DEFINE_EVENT_PRINT
537 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
538
539 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
540
541 #undef __entry
542 #define __entry REC
543
544 #undef __print_flags
545 #undef __print_symbolic
546 #undef __get_dynamic_array
547 #undef __get_str
548
549 #undef TP_printk
550 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
551
552 #undef DECLARE_EVENT_CLASS
553 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
554 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
555 static const char print_fmt_##call[] = print; \
556 static struct ftrace_event_class __used event_class_##call = { \
557 .system = __stringify(TRACE_SYSTEM), \
558 .define_fields = ftrace_define_fields_##call, \
559 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
560 .raw_init = trace_event_raw_init, \
561 .probe = ftrace_raw_event_##call, \
562 .reg = ftrace_event_reg, \
563 _TRACE_PERF_INIT(call) \
564 };
565
566 #undef DEFINE_EVENT
567 #define DEFINE_EVENT(template, call, proto, args) \
568 \
569 static struct ftrace_event_call __used \
570 __attribute__((__aligned__(4))) \
571 __attribute__((section("_ftrace_events"))) event_##call = { \
572 .name = #call, \
573 .class = &event_class_##template, \
574 .event.funcs = &ftrace_event_type_funcs_##template, \
575 .print_fmt = print_fmt_##template, \
576 };
577
578 #undef DEFINE_EVENT_PRINT
579 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
580 \
581 static const char print_fmt_##call[] = print; \
582 \
583 static struct ftrace_event_call __used \
584 __attribute__((__aligned__(4))) \
585 __attribute__((section("_ftrace_events"))) event_##call = { \
586 .name = #call, \
587 .class = &event_class_##template, \
588 .event.funcs = &ftrace_event_type_funcs_##call, \
589 .print_fmt = print_fmt_##call, \
590 }
591
592 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
593
594 /*
595 * Define the insertion callback to perf events
596 *
597 * The job is very similar to ftrace_raw_event_<call> except that we don't
598 * insert in the ring buffer but in a perf counter.
599 *
600 * static void ftrace_perf_<call>(proto)
601 * {
602 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
603 * struct ftrace_event_call *event_call = &event_<call>;
604 * extern void perf_tp_event(int, u64, u64, void *, int);
605 * struct ftrace_raw_##call *entry;
606 * struct perf_trace_buf *trace_buf;
607 * u64 __addr = 0, __count = 1;
608 * unsigned long irq_flags;
609 * struct trace_entry *ent;
610 * int __entry_size;
611 * int __data_size;
612 * int __cpu
613 * int pc;
614 *
615 * pc = preempt_count();
616 *
617 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
618 *
619 * // Below we want to get the aligned size by taking into account
620 * // the u32 field that will later store the buffer size
621 * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
622 * sizeof(u64));
623 * __entry_size -= sizeof(u32);
624 *
625 * // Protect the non nmi buffer
626 * // This also protects the rcu read side
627 * local_irq_save(irq_flags);
628 * __cpu = smp_processor_id();
629 *
630 * if (in_nmi())
631 * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
632 * else
633 * trace_buf = rcu_dereference_sched(perf_trace_buf);
634 *
635 * if (!trace_buf)
636 * goto end;
637 *
638 * trace_buf = per_cpu_ptr(trace_buf, __cpu);
639 *
640 * // Avoid recursion from perf that could mess up the buffer
641 * if (trace_buf->recursion++)
642 * goto end_recursion;
643 *
644 * raw_data = trace_buf->buf;
645 *
646 * // Make recursion update visible before entering perf_tp_event
647 * // so that we protect from perf recursions.
648 *
649 * barrier();
650 *
651 * //zero dead bytes from alignment to avoid stack leak to userspace:
652 * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
653 * entry = (struct ftrace_raw_<call> *)raw_data;
654 * ent = &entry->ent;
655 * tracing_generic_entry_update(ent, irq_flags, pc);
656 * ent->type = event_call->id;
657 *
658 * <tstruct> <- do some jobs with dynamic arrays
659 *
660 * <assign> <- affect our values
661 *
662 * perf_tp_event(event_call->id, __addr, __count, entry,
663 * __entry_size); <- submit them to perf counter
664 *
665 * }
666 */
667
668 #ifdef CONFIG_PERF_EVENTS
669
670 #undef __entry
671 #define __entry entry
672
673 #undef __get_dynamic_array
674 #define __get_dynamic_array(field) \
675 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
676
677 #undef __get_str
678 #define __get_str(field) (char *)__get_dynamic_array(field)
679
680 #undef __perf_addr
681 #define __perf_addr(a) __addr = (a)
682
683 #undef __perf_count
684 #define __perf_count(c) __count = (c)
685
686 #undef DECLARE_EVENT_CLASS
687 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
688 static notrace void \
689 perf_trace_##call(void *__data, proto) \
690 { \
691 struct ftrace_event_call *event_call = __data; \
692 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
693 struct ftrace_raw_##call *entry; \
694 struct pt_regs __regs; \
695 u64 __addr = 0, __count = 1; \
696 struct hlist_head *head; \
697 int __entry_size; \
698 int __data_size; \
699 int rctx; \
700 \
701 perf_fetch_caller_regs(&__regs); \
702 \
703 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
704 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
705 sizeof(u64)); \
706 __entry_size -= sizeof(u32); \
707 \
708 if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
709 "profile buffer not large enough")) \
710 return; \
711 \
712 entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
713 __entry_size, event_call->event.type, &__regs, &rctx); \
714 if (!entry) \
715 return; \
716 \
717 tstruct \
718 \
719 { assign; } \
720 \
721 head = this_cpu_ptr(event_call->perf_events); \
722 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
723 __count, &__regs, head); \
724 }
725
726 /*
727 * This part is compiled out, it is only here as a build time check
728 * to make sure that if the tracepoint handling changes, the
729 * perf probe will fail to compile unless it too is updated.
730 */
731 #undef DEFINE_EVENT
732 #define DEFINE_EVENT(template, call, proto, args) \
733 static inline void perf_test_probe_##call(void) \
734 { \
735 check_trace_callback_type_##call(perf_trace_##template); \
736 }
737
738
739 #undef DEFINE_EVENT_PRINT
740 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
741 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
742
743 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
744 #endif /* CONFIG_PERF_EVENTS */
745
746 #undef _TRACE_PROFILE_INIT
747
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