?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'perf/rename' into perf/core
[linux-2.6.git] / include / trace / ftrace.h
blobe718a917d89729e0f5c5861047a996ea71896a11
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 #undef TRACE_EVENT_FLAGS
86 #define TRACE_EVENT_FLAGS(name, value) \
87 __TRACE_EVENT_FLAGS(name, value)
88
89 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
90
91
92 /*
93 * Stage 2 of the trace events.
94 *
95 * Include the following:
96 *
97 * struct ftrace_data_offsets_<call> {
98 * u32 <item1>;
99 * u32 <item2>;
100 * [...]
101 * };
102 *
103 * The __dynamic_array() macro will create each u32 <item>, this is
104 * to keep the offset of each array from the beginning of the event.
105 * The size of an array is also encoded, in the higher 16 bits of <item>.
106 */
107
108 #undef __field
109 #define __field(type, item)
110
111 #undef __field_ext
112 #define __field_ext(type, item, filter_type)
113
114 #undef __array
115 #define __array(type, item, len)
116
117 #undef __dynamic_array
118 #define __dynamic_array(type, item, len) u32 item;
119
120 #undef __string
121 #define __string(item, src) __dynamic_array(char, item, -1)
122
123 #undef DECLARE_EVENT_CLASS
124 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
125 struct ftrace_data_offsets_##call { \
126 tstruct; \
127 };
128
129 #undef DEFINE_EVENT
130 #define DEFINE_EVENT(template, name, proto, args)
131
132 #undef DEFINE_EVENT_PRINT
133 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
134 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
135
136 #undef TRACE_EVENT_FLAGS
137 #define TRACE_EVENT_FLAGS(event, flag)
138
139 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
140
141 /*
142 * Stage 3 of the trace events.
143 *
144 * Override the macros in <trace/trace_events.h> to include the following:
145 *
146 * enum print_line_t
147 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
148 * {
149 * struct trace_seq *s = &iter->seq;
150 * struct ftrace_raw_<call> *field; <-- defined in stage 1
151 * struct trace_entry *entry;
152 * struct trace_seq *p = &iter->tmp_seq;
153 * int ret;
154 *
155 * entry = iter->ent;
156 *
157 * if (entry->type != event_<call>->event.type) {
158 * WARN_ON_ONCE(1);
159 * return TRACE_TYPE_UNHANDLED;
160 * }
161 *
162 * field = (typeof(field))entry;
163 *
164 * trace_seq_init(p);
165 * ret = trace_seq_printf(s, "%s: ", <call>);
166 * if (ret)
167 * ret = trace_seq_printf(s, <TP_printk> "\n");
168 * if (!ret)
169 * return TRACE_TYPE_PARTIAL_LINE;
170 *
171 * return TRACE_TYPE_HANDLED;
172 * }
173 *
174 * This is the method used to print the raw event to the trace
175 * output format. Note, this is not needed if the data is read
176 * in binary.
177 */
178
179 #undef __entry
180 #define __entry field
181
182 #undef TP_printk
183 #define TP_printk(fmt, args...) fmt "\n", args
184
185 #undef __get_dynamic_array
186 #define __get_dynamic_array(field) \
187 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
188
189 #undef __get_str
190 #define __get_str(field) (char *)__get_dynamic_array(field)
191
192 #undef __print_flags
193 #define __print_flags(flag, delim, flag_array...) \
194 ({ \
195 static const struct trace_print_flags __flags[] = \
196 { flag_array, { -1, NULL }}; \
197 ftrace_print_flags_seq(p, delim, flag, __flags); \
198 })
199
200 #undef __print_symbolic
201 #define __print_symbolic(value, symbol_array...) \
202 ({ \
203 static const struct trace_print_flags symbols[] = \
204 { symbol_array, { -1, NULL }}; \
205 ftrace_print_symbols_seq(p, value, symbols); \
206 })
207
208 #undef __print_hex
209 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
210
211 #undef DECLARE_EVENT_CLASS
212 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
213 static notrace enum print_line_t \
214 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
215 struct trace_event *trace_event) \
216 { \
217 struct ftrace_event_call *event; \
218 struct trace_seq *s = &iter->seq; \
219 struct ftrace_raw_##call *field; \
220 struct trace_entry *entry; \
221 struct trace_seq *p = &iter->tmp_seq; \
222 int ret; \
223 \
224 event = container_of(trace_event, struct ftrace_event_call, \
225 event); \
226 \
227 entry = iter->ent; \
228 \
229 if (entry->type != event->event.type) { \
230 WARN_ON_ONCE(1); \
231 return TRACE_TYPE_UNHANDLED; \
232 } \
233 \
234 field = (typeof(field))entry; \
235 \
236 trace_seq_init(p); \
237 ret = trace_seq_printf(s, "%s: ", event->name); \
238 if (ret) \
239 ret = trace_seq_printf(s, print); \
240 if (!ret) \
241 return TRACE_TYPE_PARTIAL_LINE; \
242 \
243 return TRACE_TYPE_HANDLED; \
244 } \
245 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
246 .trace = ftrace_raw_output_##call, \
247 };
248
249 #undef DEFINE_EVENT_PRINT
250 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
251 static notrace enum print_line_t \
252 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
253 struct trace_event *event) \
254 { \
255 struct trace_seq *s = &iter->seq; \
256 struct ftrace_raw_##template *field; \
257 struct trace_entry *entry; \
258 struct trace_seq *p = &iter->tmp_seq; \
259 int ret; \
260 \
261 entry = iter->ent; \
262 \
263 if (entry->type != event_##call.event.type) { \
264 WARN_ON_ONCE(1); \
265 return TRACE_TYPE_UNHANDLED; \
266 } \
267 \
268 field = (typeof(field))entry; \
269 \
270 trace_seq_init(p); \
271 ret = trace_seq_printf(s, "%s: ", #call); \
272 if (ret) \
273 ret = trace_seq_printf(s, print); \
274 if (!ret) \
275 return TRACE_TYPE_PARTIAL_LINE; \
276 \
277 return TRACE_TYPE_HANDLED; \
278 } \
279 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
280 .trace = ftrace_raw_output_##call, \
281 };
282
283 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
284
285 #undef __field_ext
286 #define __field_ext(type, item, filter_type) \
287 ret = trace_define_field(event_call, #type, #item, \
288 offsetof(typeof(field), item), \
289 sizeof(field.item), \
290 is_signed_type(type), filter_type); \
291 if (ret) \
292 return ret;
293
294 #undef __field
295 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
296
297 #undef __array
298 #define __array(type, item, len) \
299 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
300 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
301 offsetof(typeof(field), item), \
302 sizeof(field.item), \
303 is_signed_type(type), FILTER_OTHER); \
304 if (ret) \
305 return ret;
306
307 #undef __dynamic_array
308 #define __dynamic_array(type, item, len) \
309 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
310 offsetof(typeof(field), __data_loc_##item), \
311 sizeof(field.__data_loc_##item), \
312 is_signed_type(type), FILTER_OTHER);
313
314 #undef __string
315 #define __string(item, src) __dynamic_array(char, item, -1)
316
317 #undef DECLARE_EVENT_CLASS
318 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
319 static int notrace \
320 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
321 { \
322 struct ftrace_raw_##call field; \
323 int ret; \
324 \
325 tstruct; \
326 \
327 return ret; \
328 }
329
330 #undef DEFINE_EVENT
331 #define DEFINE_EVENT(template, name, proto, args)
332
333 #undef DEFINE_EVENT_PRINT
334 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
335 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
336
337 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
338
339 /*
340 * remember the offset of each array from the beginning of the event.
341 */
342
343 #undef __entry
344 #define __entry entry
345
346 #undef __field
347 #define __field(type, item)
348
349 #undef __field_ext
350 #define __field_ext(type, item, filter_type)
351
352 #undef __array
353 #define __array(type, item, len)
354
355 #undef __dynamic_array
356 #define __dynamic_array(type, item, len) \
357 __data_offsets->item = __data_size + \
358 offsetof(typeof(*entry), __data); \
359 __data_offsets->item |= (len * sizeof(type)) << 16; \
360 __data_size += (len) * sizeof(type);
361
362 #undef __string
363 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
364
365 #undef DECLARE_EVENT_CLASS
366 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
367 static inline notrace int ftrace_get_offsets_##call( \
368 struct ftrace_data_offsets_##call *__data_offsets, proto) \
369 { \
370 int __data_size = 0; \
371 struct ftrace_raw_##call __maybe_unused *entry; \
372 \
373 tstruct; \
374 \
375 return __data_size; \
376 }
377
378 #undef DEFINE_EVENT
379 #define DEFINE_EVENT(template, name, proto, args)
380
381 #undef DEFINE_EVENT_PRINT
382 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
383 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
384
385 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
386
387 /*
388 * Stage 4 of the trace events.
389 *
390 * Override the macros in <trace/trace_events.h> to include the following:
391 *
392 * For those macros defined with TRACE_EVENT:
393 *
394 * static struct ftrace_event_call event_<call>;
395 *
396 * static void ftrace_raw_event_<call>(void *__data, proto)
397 * {
398 * struct ftrace_event_call *event_call = __data;
399 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
400 * struct ring_buffer_event *event;
401 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
402 * struct ring_buffer *buffer;
403 * unsigned long irq_flags;
404 * int __data_size;
405 * int pc;
406 *
407 * local_save_flags(irq_flags);
408 * pc = preempt_count();
409 *
410 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
411 *
412 * event = trace_current_buffer_lock_reserve(&buffer,
413 * event_<call>->event.type,
414 * sizeof(*entry) + __data_size,
415 * irq_flags, pc);
416 * if (!event)
417 * return;
418 * entry = ring_buffer_event_data(event);
419 *
420 * { <assign>; } <-- Here we assign the entries by the __field and
421 * __array macros.
422 *
423 * if (!filter_current_check_discard(buffer, event_call, entry, event))
424 * trace_current_buffer_unlock_commit(buffer,
425 * event, irq_flags, pc);
426 * }
427 *
428 * static struct trace_event ftrace_event_type_<call> = {
429 * .trace = ftrace_raw_output_<call>, <-- stage 2
430 * };
431 *
432 * static const char print_fmt_<call>[] = <TP_printk>;
433 *
434 * static struct ftrace_event_class __used event_class_<template> = {
435 * .system = "<system>",
436 * .define_fields = ftrace_define_fields_<call>,
437 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
438 * .raw_init = trace_event_raw_init,
439 * .probe = ftrace_raw_event_##call,
440 * .reg = ftrace_event_reg,
441 * };
442 *
443 * static struct ftrace_event_call __used
444 * __attribute__((__aligned__(4)))
445 * __attribute__((section("_ftrace_events"))) event_<call> = {
446 * .name = "<call>",
447 * .class = event_class_<template>,
448 * .event = &ftrace_event_type_<call>,
449 * .print_fmt = print_fmt_<call>,
450 * };
451 *
452 */
453
454 #ifdef CONFIG_PERF_EVENTS
455
456 #define _TRACE_PERF_PROTO(call, proto) \
457 static notrace void \
458 perf_trace_##call(void *__data, proto);
459
460 #define _TRACE_PERF_INIT(call) \
461 .perf_probe = perf_trace_##call,
462
463 #else
464 #define _TRACE_PERF_PROTO(call, proto)
465 #define _TRACE_PERF_INIT(call)
466 #endif /* CONFIG_PERF_EVENTS */
467
468 #undef __entry
469 #define __entry entry
470
471 #undef __field
472 #define __field(type, item)
473
474 #undef __array
475 #define __array(type, item, len)
476
477 #undef __dynamic_array
478 #define __dynamic_array(type, item, len) \
479 __entry->__data_loc_##item = __data_offsets.item;
480
481 #undef __string
482 #define __string(item, src) __dynamic_array(char, item, -1) \
483
484 #undef __assign_str
485 #define __assign_str(dst, src) \
486 strcpy(__get_str(dst), src);
487
488 #undef TP_fast_assign
489 #define TP_fast_assign(args...) args
490
491 #undef TP_perf_assign
492 #define TP_perf_assign(args...)
493
494 #undef DECLARE_EVENT_CLASS
495 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
496 \
497 static notrace void \
498 ftrace_raw_event_##call(void *__data, proto) \
499 { \
500 struct ftrace_event_call *event_call = __data; \
501 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
502 struct ring_buffer_event *event; \
503 struct ftrace_raw_##call *entry; \
504 struct ring_buffer *buffer; \
505 unsigned long irq_flags; \
506 int __data_size; \
507 int pc; \
508 \
509 local_save_flags(irq_flags); \
510 pc = preempt_count(); \
511 \
512 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
513 \
514 event = trace_current_buffer_lock_reserve(&buffer, \
515 event_call->event.type, \
516 sizeof(*entry) + __data_size, \
517 irq_flags, pc); \
518 if (!event) \
519 return; \
520 entry = ring_buffer_event_data(event); \
521 \
522 tstruct \
523 \
524 { assign; } \
525 \
526 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
527 trace_nowake_buffer_unlock_commit(buffer, \
528 event, irq_flags, pc); \
529 }
530 /*
531 * The ftrace_test_probe is compiled out, it is only here as a build time check
532 * to make sure that if the tracepoint handling changes, the ftrace probe will
533 * fail to compile unless it too is updated.
534 */
535
536 #undef DEFINE_EVENT
537 #define DEFINE_EVENT(template, call, proto, args) \
538 static inline void ftrace_test_probe_##call(void) \
539 { \
540 check_trace_callback_type_##call(ftrace_raw_event_##template); \
541 }
542
543 #undef DEFINE_EVENT_PRINT
544 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
545
546 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
547
548 #undef __entry
549 #define __entry REC
550
551 #undef __print_flags
552 #undef __print_symbolic
553 #undef __get_dynamic_array
554 #undef __get_str
555
556 #undef TP_printk
557 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
558
559 #undef DECLARE_EVENT_CLASS
560 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
561 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
562 static const char print_fmt_##call[] = print; \
563 static struct ftrace_event_class __used event_class_##call = { \
564 .system = __stringify(TRACE_SYSTEM), \
565 .define_fields = ftrace_define_fields_##call, \
566 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
567 .raw_init = trace_event_raw_init, \
568 .probe = ftrace_raw_event_##call, \
569 .reg = ftrace_event_reg, \
570 _TRACE_PERF_INIT(call) \
571 };
572
573 #undef DEFINE_EVENT
574 #define DEFINE_EVENT(template, call, proto, args) \
575 \
576 static struct ftrace_event_call __used \
577 __attribute__((__aligned__(4))) \
578 __attribute__((section("_ftrace_events"))) event_##call = { \
579 .name = #call, \
580 .class = &event_class_##template, \
581 .event.funcs = &ftrace_event_type_funcs_##template, \
582 .print_fmt = print_fmt_##template, \
583 };
584
585 #undef DEFINE_EVENT_PRINT
586 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
587 \
588 static const char print_fmt_##call[] = print; \
589 \
590 static struct ftrace_event_call __used \
591 __attribute__((__aligned__(4))) \
592 __attribute__((section("_ftrace_events"))) event_##call = { \
593 .name = #call, \
594 .class = &event_class_##template, \
595 .event.funcs = &ftrace_event_type_funcs_##call, \
596 .print_fmt = print_fmt_##call, \
597 }
598
599 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
600
601 /*
602 * Define the insertion callback to perf events
603 *
604 * The job is very similar to ftrace_raw_event_<call> except that we don't
605 * insert in the ring buffer but in a perf counter.
606 *
607 * static void ftrace_perf_<call>(proto)
608 * {
609 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
610 * struct ftrace_event_call *event_call = &event_<call>;
611 * extern void perf_tp_event(int, u64, u64, void *, int);
612 * struct ftrace_raw_##call *entry;
613 * struct perf_trace_buf *trace_buf;
614 * u64 __addr = 0, __count = 1;
615 * unsigned long irq_flags;
616 * struct trace_entry *ent;
617 * int __entry_size;
618 * int __data_size;
619 * int __cpu
620 * int pc;
621 *
622 * pc = preempt_count();
623 *
624 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
625 *
626 * // Below we want to get the aligned size by taking into account
627 * // the u32 field that will later store the buffer size
628 * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
629 * sizeof(u64));
630 * __entry_size -= sizeof(u32);
631 *
632 * // Protect the non nmi buffer
633 * // This also protects the rcu read side
634 * local_irq_save(irq_flags);
635 * __cpu = smp_processor_id();
636 *
637 * if (in_nmi())
638 * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
639 * else
640 * trace_buf = rcu_dereference_sched(perf_trace_buf);
641 *
642 * if (!trace_buf)
643 * goto end;
644 *
645 * trace_buf = per_cpu_ptr(trace_buf, __cpu);
646 *
647 * // Avoid recursion from perf that could mess up the buffer
648 * if (trace_buf->recursion++)
649 * goto end_recursion;
650 *
651 * raw_data = trace_buf->buf;
652 *
653 * // Make recursion update visible before entering perf_tp_event
654 * // so that we protect from perf recursions.
655 *
656 * barrier();
657 *
658 * //zero dead bytes from alignment to avoid stack leak to userspace:
659 * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
660 * entry = (struct ftrace_raw_<call> *)raw_data;
661 * ent = &entry->ent;
662 * tracing_generic_entry_update(ent, irq_flags, pc);
663 * ent->type = event_call->id;
664 *
665 * <tstruct> <- do some jobs with dynamic arrays
666 *
667 * <assign> <- affect our values
668 *
669 * perf_tp_event(event_call->id, __addr, __count, entry,
670 * __entry_size); <- submit them to perf counter
671 *
672 * }
673 */
674
675 #ifdef CONFIG_PERF_EVENTS
676
677 #undef __entry
678 #define __entry entry
679
680 #undef __get_dynamic_array
681 #define __get_dynamic_array(field) \
682 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
683
684 #undef __get_str
685 #define __get_str(field) (char *)__get_dynamic_array(field)
686
687 #undef __perf_addr
688 #define __perf_addr(a) __addr = (a)
689
690 #undef __perf_count
691 #define __perf_count(c) __count = (c)
692
693 #undef DECLARE_EVENT_CLASS
694 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
695 static notrace void \
696 perf_trace_##call(void *__data, proto) \
697 { \
698 struct ftrace_event_call *event_call = __data; \
699 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
700 struct ftrace_raw_##call *entry; \
701 struct pt_regs __regs; \
702 u64 __addr = 0, __count = 1; \
703 struct hlist_head *head; \
704 int __entry_size; \
705 int __data_size; \
706 int rctx; \
707 \
708 perf_fetch_caller_regs(&__regs); \
709 \
710 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
711 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
712 sizeof(u64)); \
713 __entry_size -= sizeof(u32); \
714 \
715 if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
716 "profile buffer not large enough")) \
717 return; \
718 \
719 entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
720 __entry_size, event_call->event.type, &__regs, &rctx); \
721 if (!entry) \
722 return; \
723 \
724 tstruct \
725 \
726 { assign; } \
727 \
728 head = this_cpu_ptr(event_call->perf_events); \
729 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
730 __count, &__regs, head); \
731 }
732
733 /*
734 * This part is compiled out, it is only here as a build time check
735 * to make sure that if the tracepoint handling changes, the
736 * perf probe will fail to compile unless it too is updated.
737 */
738 #undef DEFINE_EVENT
739 #define DEFINE_EVENT(template, call, proto, args) \
740 static inline void perf_test_probe_##call(void) \
741 { \
742 check_trace_callback_type_##call(perf_trace_##template); \
743 }
744
745
746 #undef DEFINE_EVENT_PRINT
747 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
748 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
749
750 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
751 #endif /* CONFIG_PERF_EVENTS */
752
753 #undef _TRACE_PROFILE_INIT
754
Linus' kernel tree