tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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_FN
75#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
76 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
77
78#undef DEFINE_EVENT_PRINT
79#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
80 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
81
82/* Callbacks are meaningless to ftrace. */
83#undef TRACE_EVENT_FN
84#define TRACE_EVENT_FN(name, proto, args, tstruct, \
85 assign, print, reg, unreg) \
86 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
87 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
88
89#undef TRACE_EVENT_FLAGS
90#define TRACE_EVENT_FLAGS(name, value) \
91 __TRACE_EVENT_FLAGS(name, value)
92
93#undef TRACE_EVENT_PERF_PERM
94#define TRACE_EVENT_PERF_PERM(name, expr...) \
95 __TRACE_EVENT_PERF_PERM(name, expr)
96
97#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
98
99
100/*
101 * Stage 2 of the trace events.
102 *
103 * Include the following:
104 *
105 * struct ftrace_data_offsets_<call> {
106 * u32 <item1>;
107 * u32 <item2>;
108 * [...]
109 * };
110 *
111 * The __dynamic_array() macro will create each u32 <item>, this is
112 * to keep the offset of each array from the beginning of the event.
113 * The size of an array is also encoded, in the higher 16 bits of <item>.
114 */
115
116#undef __field
117#define __field(type, item)
118
119#undef __field_ext
120#define __field_ext(type, item, filter_type)
121
122#undef __array
123#define __array(type, item, len)
124
125#undef __dynamic_array
126#define __dynamic_array(type, item, len) u32 item;
127
128#undef __string
129#define __string(item, src) __dynamic_array(char, item, -1)
130
131#undef DECLARE_EVENT_CLASS
132#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
133 struct ftrace_data_offsets_##call { \
134 tstruct; \
135 };
136
137#undef DEFINE_EVENT
138#define DEFINE_EVENT(template, name, proto, args)
139
140#undef DEFINE_EVENT_PRINT
141#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
142 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
143
144#undef TRACE_EVENT_FLAGS
145#define TRACE_EVENT_FLAGS(event, flag)
146
147#undef TRACE_EVENT_PERF_PERM
148#define TRACE_EVENT_PERF_PERM(event, expr...)
149
150#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
151
152/*
153 * Stage 3 of the trace events.
154 *
155 * Override the macros in <trace/trace_events.h> to include the following:
156 *
157 * enum print_line_t
158 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
159 * {
160 * struct trace_seq *s = &iter->seq;
161 * struct ftrace_raw_<call> *field; <-- defined in stage 1
162 * struct trace_entry *entry;
163 * struct trace_seq *p = &iter->tmp_seq;
164 * int ret;
165 *
166 * entry = iter->ent;
167 *
168 * if (entry->type != event_<call>->event.type) {
169 * WARN_ON_ONCE(1);
170 * return TRACE_TYPE_UNHANDLED;
171 * }
172 *
173 * field = (typeof(field))entry;
174 *
175 * trace_seq_init(p);
176 * ret = trace_seq_printf(s, "%s: ", <call>);
177 * if (ret)
178 * ret = trace_seq_printf(s, <TP_printk> "\n");
179 * if (!ret)
180 * return TRACE_TYPE_PARTIAL_LINE;
181 *
182 * return TRACE_TYPE_HANDLED;
183 * }
184 *
185 * This is the method used to print the raw event to the trace
186 * output format. Note, this is not needed if the data is read
187 * in binary.
188 */
189
190#undef __entry
191#define __entry field
192
193#undef TP_printk
194#define TP_printk(fmt, args...) fmt "\n", args
195
196#undef __get_dynamic_array
197#define __get_dynamic_array(field) \
198 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
199
200#undef __get_str
201#define __get_str(field) (char *)__get_dynamic_array(field)
202
203#undef __print_flags
204#define __print_flags(flag, delim, flag_array...) \
205 ({ \
206 static const struct trace_print_flags __flags[] = \
207 { flag_array, { -1, NULL }}; \
208 ftrace_print_flags_seq(p, delim, flag, __flags); \
209 })
210
211#undef __print_symbolic
212#define __print_symbolic(value, symbol_array...) \
213 ({ \
214 static const struct trace_print_flags symbols[] = \
215 { symbol_array, { -1, NULL }}; \
216 ftrace_print_symbols_seq(p, value, symbols); \
217 })
218
219#undef __print_symbolic_u64
220#if BITS_PER_LONG == 32
221#define __print_symbolic_u64(value, symbol_array...) \
222 ({ \
223 static const struct trace_print_flags_u64 symbols[] = \
224 { symbol_array, { -1, NULL } }; \
225 ftrace_print_symbols_seq_u64(p, value, symbols); \
226 })
227#else
228#define __print_symbolic_u64(value, symbol_array...) \
229 __print_symbolic(value, symbol_array)
230#endif
231
232#undef __print_hex
233#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
234
235#undef DECLARE_EVENT_CLASS
236#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
237static notrace enum print_line_t \
238ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
239 struct trace_event *trace_event) \
240{ \
241 struct trace_seq *s = &iter->seq; \
242 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
243 struct ftrace_raw_##call *field; \
244 int ret; \
245 \
246 field = (typeof(field))iter->ent; \
247 \
248 ret = ftrace_raw_output_prep(iter, trace_event); \
249 if (ret) \
250 return ret; \
251 \
252 ret = trace_seq_printf(s, print); \
253 if (!ret) \
254 return TRACE_TYPE_PARTIAL_LINE; \
255 \
256 return TRACE_TYPE_HANDLED; \
257} \
258static struct trace_event_functions ftrace_event_type_funcs_##call = { \
259 .trace = ftrace_raw_output_##call, \
260};
261
262#undef DEFINE_EVENT_PRINT
263#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
264static notrace enum print_line_t \
265ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
266 struct trace_event *event) \
267{ \
268 struct trace_seq *s = &iter->seq; \
269 struct ftrace_raw_##template *field; \
270 struct trace_entry *entry; \
271 struct trace_seq *p = &iter->tmp_seq; \
272 int ret; \
273 \
274 entry = iter->ent; \
275 \
276 if (entry->type != event_##call.event.type) { \
277 WARN_ON_ONCE(1); \
278 return TRACE_TYPE_UNHANDLED; \
279 } \
280 \
281 field = (typeof(field))entry; \
282 \
283 trace_seq_init(p); \
284 ret = trace_seq_printf(s, "%s: ", #call); \
285 if (ret) \
286 ret = trace_seq_printf(s, print); \
287 if (!ret) \
288 return TRACE_TYPE_PARTIAL_LINE; \
289 \
290 return TRACE_TYPE_HANDLED; \
291} \
292static struct trace_event_functions ftrace_event_type_funcs_##call = { \
293 .trace = ftrace_raw_output_##call, \
294};
295
296#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
297
298#undef __field_ext
299#define __field_ext(type, item, filter_type) \
300 ret = trace_define_field(event_call, #type, #item, \
301 offsetof(typeof(field), item), \
302 sizeof(field.item), \
303 is_signed_type(type), filter_type); \
304 if (ret) \
305 return ret;
306
307#undef __field
308#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
309
310#undef __array
311#define __array(type, item, len) \
312 do { \
313 mutex_lock(&event_storage_mutex); \
314 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
315 snprintf(event_storage, sizeof(event_storage), \
316 "%s[%d]", #type, len); \
317 ret = trace_define_field(event_call, event_storage, #item, \
318 offsetof(typeof(field), item), \
319 sizeof(field.item), \
320 is_signed_type(type), FILTER_OTHER); \
321 mutex_unlock(&event_storage_mutex); \
322 if (ret) \
323 return ret; \
324 } while (0);
325
326#undef __dynamic_array
327#define __dynamic_array(type, item, len) \
328 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
329 offsetof(typeof(field), __data_loc_##item), \
330 sizeof(field.__data_loc_##item), \
331 is_signed_type(type), FILTER_OTHER);
332
333#undef __string
334#define __string(item, src) __dynamic_array(char, item, -1)
335
336#undef DECLARE_EVENT_CLASS
337#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
338static int notrace __init \
339ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
340{ \
341 struct ftrace_raw_##call field; \
342 int ret; \
343 \
344 tstruct; \
345 \
346 return ret; \
347}
348
349#undef DEFINE_EVENT
350#define DEFINE_EVENT(template, name, proto, args)
351
352#undef DEFINE_EVENT_PRINT
353#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
354 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
355
356#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
357
358/*
359 * remember the offset of each array from the beginning of the event.
360 */
361
362#undef __entry
363#define __entry entry
364
365#undef __field
366#define __field(type, item)
367
368#undef __field_ext
369#define __field_ext(type, item, filter_type)
370
371#undef __array
372#define __array(type, item, len)
373
374#undef __dynamic_array
375#define __dynamic_array(type, item, len) \
376 __data_offsets->item = __data_size + \
377 offsetof(typeof(*entry), __data); \
378 __data_offsets->item |= (len * sizeof(type)) << 16; \
379 __data_size += (len) * sizeof(type);
380
381#undef __string
382#define __string(item, src) __dynamic_array(char, item, \
383 strlen((src) ? (const char *)(src) : "(null)") + 1)
384
385#undef DECLARE_EVENT_CLASS
386#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
387static inline notrace int ftrace_get_offsets_##call( \
388 struct ftrace_data_offsets_##call *__data_offsets, proto) \
389{ \
390 int __data_size = 0; \
391 struct ftrace_raw_##call __maybe_unused *entry; \
392 \
393 tstruct; \
394 \
395 return __data_size; \
396}
397
398#undef DEFINE_EVENT
399#define DEFINE_EVENT(template, name, proto, args)
400
401#undef DEFINE_EVENT_PRINT
402#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
403 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
404
405#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
406
407/*
408 * Stage 4 of the trace events.
409 *
410 * Override the macros in <trace/trace_events.h> to include the following:
411 *
412 * For those macros defined with TRACE_EVENT:
413 *
414 * static struct ftrace_event_call event_<call>;
415 *
416 * static void ftrace_raw_event_<call>(void *__data, proto)
417 * {
418 * struct ftrace_event_file *ftrace_file = __data;
419 * struct ftrace_event_call *event_call = ftrace_file->event_call;
420 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
421 * unsigned long eflags = ftrace_file->flags;
422 * enum event_trigger_type __tt = ETT_NONE;
423 * struct ring_buffer_event *event;
424 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
425 * struct ring_buffer *buffer;
426 * unsigned long irq_flags;
427 * int __data_size;
428 * int pc;
429 *
430 * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
431 * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
432 * event_triggers_call(ftrace_file, NULL);
433 * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
434 * return;
435 * }
436 *
437 * local_save_flags(irq_flags);
438 * pc = preempt_count();
439 *
440 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
441 *
442 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
443 * event_<call>->event.type,
444 * sizeof(*entry) + __data_size,
445 * irq_flags, pc);
446 * if (!event)
447 * return;
448 * entry = ring_buffer_event_data(event);
449 *
450 * { <assign>; } <-- Here we assign the entries by the __field and
451 * __array macros.
452 *
453 * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
454 * __tt = event_triggers_call(ftrace_file, entry);
455 *
456 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
457 * &ftrace_file->flags))
458 * ring_buffer_discard_commit(buffer, event);
459 * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
460 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
461 *
462 * if (__tt)
463 * event_triggers_post_call(ftrace_file, __tt);
464 * }
465 *
466 * static struct trace_event ftrace_event_type_<call> = {
467 * .trace = ftrace_raw_output_<call>, <-- stage 2
468 * };
469 *
470 * static const char print_fmt_<call>[] = <TP_printk>;
471 *
472 * static struct ftrace_event_class __used event_class_<template> = {
473 * .system = "<system>",
474 * .define_fields = ftrace_define_fields_<call>,
475 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
476 * .raw_init = trace_event_raw_init,
477 * .probe = ftrace_raw_event_##call,
478 * .reg = ftrace_event_reg,
479 * };
480 *
481 * static struct ftrace_event_call event_<call> = {
482 * .name = "<call>",
483 * .class = event_class_<template>,
484 * .event = &ftrace_event_type_<call>,
485 * .print_fmt = print_fmt_<call>,
486 * };
487 * // its only safe to use pointers when doing linker tricks to
488 * // create an array.
489 * static struct ftrace_event_call __used
490 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
491 *
492 */
493
494#ifdef CONFIG_PERF_EVENTS
495
496#define _TRACE_PERF_PROTO(call, proto) \
497 static notrace void \
498 perf_trace_##call(void *__data, proto);
499
500#define _TRACE_PERF_INIT(call) \
501 .perf_probe = perf_trace_##call,
502
503#else
504#define _TRACE_PERF_PROTO(call, proto)
505#define _TRACE_PERF_INIT(call)
506#endif /* CONFIG_PERF_EVENTS */
507
508#undef __entry
509#define __entry entry
510
511#undef __field
512#define __field(type, item)
513
514#undef __array
515#define __array(type, item, len)
516
517#undef __dynamic_array
518#define __dynamic_array(type, item, len) \
519 __entry->__data_loc_##item = __data_offsets.item;
520
521#undef __string
522#define __string(item, src) __dynamic_array(char, item, -1) \
523
524#undef __assign_str
525#define __assign_str(dst, src) \
526 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
527
528#undef TP_fast_assign
529#define TP_fast_assign(args...) args
530
531#undef __perf_addr
532#define __perf_addr(a) (a)
533
534#undef __perf_count
535#define __perf_count(c) (c)
536
537#undef __perf_task
538#define __perf_task(t) (t)
539
540#undef DECLARE_EVENT_CLASS
541#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
542 \
543static notrace void \
544ftrace_raw_event_##call(void *__data, proto) \
545{ \
546 struct ftrace_event_file *ftrace_file = __data; \
547 struct ftrace_event_call *event_call = ftrace_file->event_call; \
548 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
549 struct ring_buffer_event *event; \
550 struct ftrace_raw_##call *entry; \
551 struct ring_buffer *buffer; \
552 unsigned long irq_flags; \
553 int __data_size; \
554 int pc; \
555 \
556 if (ftrace_trigger_soft_disabled(ftrace_file)) \
557 return; \
558 \
559 local_save_flags(irq_flags); \
560 pc = preempt_count(); \
561 \
562 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
563 \
564 event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, \
565 event_call->event.type, \
566 sizeof(*entry) + __data_size, \
567 irq_flags, pc); \
568 if (!event) \
569 return; \
570 entry = ring_buffer_event_data(event); \
571 \
572 tstruct \
573 \
574 { assign; } \
575 \
576 event_trigger_unlock_commit(ftrace_file, buffer, event, entry, \
577 irq_flags, pc); \
578}
579/*
580 * The ftrace_test_probe is compiled out, it is only here as a build time check
581 * to make sure that if the tracepoint handling changes, the ftrace probe will
582 * fail to compile unless it too is updated.
583 */
584
585#undef DEFINE_EVENT
586#define DEFINE_EVENT(template, call, proto, args) \
587static inline void ftrace_test_probe_##call(void) \
588{ \
589 check_trace_callback_type_##call(ftrace_raw_event_##template); \
590}
591
592#undef DEFINE_EVENT_PRINT
593#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
594
595#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
596
597#undef __entry
598#define __entry REC
599
600#undef __print_flags
601#undef __print_symbolic
602#undef __print_hex
603#undef __get_dynamic_array
604#undef __get_str
605
606#undef TP_printk
607#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
608
609#undef DECLARE_EVENT_CLASS
610#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
611_TRACE_PERF_PROTO(call, PARAMS(proto)); \
612static const char print_fmt_##call[] = print; \
613static struct ftrace_event_class __used __refdata event_class_##call = { \
614 .system = __stringify(TRACE_SYSTEM), \
615 .define_fields = ftrace_define_fields_##call, \
616 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
617 .raw_init = trace_event_raw_init, \
618 .probe = ftrace_raw_event_##call, \
619 .reg = ftrace_event_reg, \
620 _TRACE_PERF_INIT(call) \
621};
622
623#undef DEFINE_EVENT
624#define DEFINE_EVENT(template, call, proto, args) \
625 \
626static struct ftrace_event_call __used event_##call = { \
627 .name = #call, \
628 .class = &event_class_##template, \
629 .event.funcs = &ftrace_event_type_funcs_##template, \
630 .print_fmt = print_fmt_##template, \
631}; \
632static struct ftrace_event_call __used \
633__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
634
635#undef DEFINE_EVENT_PRINT
636#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
637 \
638static const char print_fmt_##call[] = print; \
639 \
640static struct ftrace_event_call __used event_##call = { \
641 .name = #call, \
642 .class = &event_class_##template, \
643 .event.funcs = &ftrace_event_type_funcs_##call, \
644 .print_fmt = print_fmt_##call, \
645}; \
646static struct ftrace_event_call __used \
647__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
648
649#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
650
651
652#ifdef CONFIG_PERF_EVENTS
653
654#undef __entry
655#define __entry entry
656
657#undef __get_dynamic_array
658#define __get_dynamic_array(field) \
659 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
660
661#undef __get_str
662#define __get_str(field) (char *)__get_dynamic_array(field)
663
664#undef __perf_addr
665#define __perf_addr(a) (__addr = (a))
666
667#undef __perf_count
668#define __perf_count(c) (__count = (c))
669
670#undef __perf_task
671#define __perf_task(t) (__task = (t))
672
673#undef DECLARE_EVENT_CLASS
674#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
675static notrace void \
676perf_trace_##call(void *__data, proto) \
677{ \
678 struct ftrace_event_call *event_call = __data; \
679 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
680 struct ftrace_raw_##call *entry; \
681 struct pt_regs __regs; \
682 u64 __addr = 0, __count = 1; \
683 struct task_struct *__task = NULL; \
684 struct hlist_head *head; \
685 int __entry_size; \
686 int __data_size; \
687 int rctx; \
688 \
689 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
690 \
691 head = this_cpu_ptr(event_call->perf_events); \
692 if (__builtin_constant_p(!__task) && !__task && \
693 hlist_empty(head)) \
694 return; \
695 \
696 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
697 sizeof(u64)); \
698 __entry_size -= sizeof(u32); \
699 \
700 perf_fetch_caller_regs(&__regs); \
701 entry = perf_trace_buf_prepare(__entry_size, \
702 event_call->event.type, &__regs, &rctx); \
703 if (!entry) \
704 return; \
705 \
706 tstruct \
707 \
708 { assign; } \
709 \
710 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
711 __count, &__regs, head, __task); \
712}
713
714/*
715 * This part is compiled out, it is only here as a build time check
716 * to make sure that if the tracepoint handling changes, the
717 * perf probe will fail to compile unless it too is updated.
718 */
719#undef DEFINE_EVENT
720#define DEFINE_EVENT(template, call, proto, args) \
721static inline void perf_test_probe_##call(void) \
722{ \
723 check_trace_callback_type_##call(perf_trace_##template); \
724}
725
726
727#undef DEFINE_EVENT_PRINT
728#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
729 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
730
731#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
732#endif /* CONFIG_PERF_EVENTS */
733