tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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_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) \
213static notrace enum print_line_t \
214ftrace_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} \
245static 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) \
251static notrace enum print_line_t \
252ftrace_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} \
279static 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 do { \
300 mutex_lock(&event_storage_mutex); \
301 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
302 snprintf(event_storage, sizeof(event_storage), \
303 "%s[%d]", #type, len); \
304 ret = trace_define_field(event_call, event_storage, #item, \
305 offsetof(typeof(field), item), \
306 sizeof(field.item), \
307 is_signed_type(type), FILTER_OTHER); \
308 mutex_unlock(&event_storage_mutex); \
309 if (ret) \
310 return ret; \
311 } while (0);
312
313#undef __dynamic_array
314#define __dynamic_array(type, item, len) \
315 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
316 offsetof(typeof(field), __data_loc_##item), \
317 sizeof(field.__data_loc_##item), \
318 is_signed_type(type), FILTER_OTHER);
319
320#undef __string
321#define __string(item, src) __dynamic_array(char, item, -1)
322
323#undef DECLARE_EVENT_CLASS
324#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
325static int notrace \
326ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
327{ \
328 struct ftrace_raw_##call field; \
329 int ret; \
330 \
331 tstruct; \
332 \
333 return ret; \
334}
335
336#undef DEFINE_EVENT
337#define DEFINE_EVENT(template, name, proto, args)
338
339#undef DEFINE_EVENT_PRINT
340#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
341 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
342
343#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
344
345/*
346 * remember the offset of each array from the beginning of the event.
347 */
348
349#undef __entry
350#define __entry entry
351
352#undef __field
353#define __field(type, item)
354
355#undef __field_ext
356#define __field_ext(type, item, filter_type)
357
358#undef __array
359#define __array(type, item, len)
360
361#undef __dynamic_array
362#define __dynamic_array(type, item, len) \
363 __data_offsets->item = __data_size + \
364 offsetof(typeof(*entry), __data); \
365 __data_offsets->item |= (len * sizeof(type)) << 16; \
366 __data_size += (len) * sizeof(type);
367
368#undef __string
369#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
370
371#undef DECLARE_EVENT_CLASS
372#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
373static inline notrace int ftrace_get_offsets_##call( \
374 struct ftrace_data_offsets_##call *__data_offsets, proto) \
375{ \
376 int __data_size = 0; \
377 struct ftrace_raw_##call __maybe_unused *entry; \
378 \
379 tstruct; \
380 \
381 return __data_size; \
382}
383
384#undef DEFINE_EVENT
385#define DEFINE_EVENT(template, name, proto, args)
386
387#undef DEFINE_EVENT_PRINT
388#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
389 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
390
391#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
392
393/*
394 * Stage 4 of the trace events.
395 *
396 * Override the macros in <trace/trace_events.h> to include the following:
397 *
398 * For those macros defined with TRACE_EVENT:
399 *
400 * static struct ftrace_event_call event_<call>;
401 *
402 * static void ftrace_raw_event_<call>(void *__data, proto)
403 * {
404 * struct ftrace_event_call *event_call = __data;
405 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
406 * struct ring_buffer_event *event;
407 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
408 * struct ring_buffer *buffer;
409 * unsigned long irq_flags;
410 * int __data_size;
411 * int pc;
412 *
413 * local_save_flags(irq_flags);
414 * pc = preempt_count();
415 *
416 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
417 *
418 * event = trace_current_buffer_lock_reserve(&buffer,
419 * event_<call>->event.type,
420 * sizeof(*entry) + __data_size,
421 * irq_flags, pc);
422 * if (!event)
423 * return;
424 * entry = ring_buffer_event_data(event);
425 *
426 * { <assign>; } <-- Here we assign the entries by the __field and
427 * __array macros.
428 *
429 * if (!filter_current_check_discard(buffer, event_call, entry, event))
430 * trace_current_buffer_unlock_commit(buffer,
431 * event, irq_flags, pc);
432 * }
433 *
434 * static struct trace_event ftrace_event_type_<call> = {
435 * .trace = ftrace_raw_output_<call>, <-- stage 2
436 * };
437 *
438 * static const char print_fmt_<call>[] = <TP_printk>;
439 *
440 * static struct ftrace_event_class __used event_class_<template> = {
441 * .system = "<system>",
442 * .define_fields = ftrace_define_fields_<call>,
443 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
444 * .raw_init = trace_event_raw_init,
445 * .probe = ftrace_raw_event_##call,
446 * .reg = ftrace_event_reg,
447 * };
448 *
449 * static struct ftrace_event_call __used
450 * __attribute__((__aligned__(4)))
451 * __attribute__((section("_ftrace_events"))) event_<call> = {
452 * .name = "<call>",
453 * .class = event_class_<template>,
454 * .event = &ftrace_event_type_<call>,
455 * .print_fmt = print_fmt_<call>,
456 * };
457 *
458 */
459
460#ifdef CONFIG_PERF_EVENTS
461
462#define _TRACE_PERF_PROTO(call, proto) \
463 static notrace void \
464 perf_trace_##call(void *__data, proto);
465
466#define _TRACE_PERF_INIT(call) \
467 .perf_probe = perf_trace_##call,
468
469#else
470#define _TRACE_PERF_PROTO(call, proto)
471#define _TRACE_PERF_INIT(call)
472#endif /* CONFIG_PERF_EVENTS */
473
474#undef __entry
475#define __entry entry
476
477#undef __field
478#define __field(type, item)
479
480#undef __array
481#define __array(type, item, len)
482
483#undef __dynamic_array
484#define __dynamic_array(type, item, len) \
485 __entry->__data_loc_##item = __data_offsets.item;
486
487#undef __string
488#define __string(item, src) __dynamic_array(char, item, -1) \
489
490#undef __assign_str
491#define __assign_str(dst, src) \
492 strcpy(__get_str(dst), src);
493
494#undef TP_fast_assign
495#define TP_fast_assign(args...) args
496
497#undef TP_perf_assign
498#define TP_perf_assign(args...)
499
500#undef DECLARE_EVENT_CLASS
501#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
502 \
503static notrace void \
504ftrace_raw_event_##call(void *__data, proto) \
505{ \
506 struct ftrace_event_call *event_call = __data; \
507 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
508 struct ring_buffer_event *event; \
509 struct ftrace_raw_##call *entry; \
510 struct ring_buffer *buffer; \
511 unsigned long irq_flags; \
512 int __data_size; \
513 int pc; \
514 \
515 local_save_flags(irq_flags); \
516 pc = preempt_count(); \
517 \
518 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
519 \
520 event = trace_current_buffer_lock_reserve(&buffer, \
521 event_call->event.type, \
522 sizeof(*entry) + __data_size, \
523 irq_flags, pc); \
524 if (!event) \
525 return; \
526 entry = ring_buffer_event_data(event); \
527 \
528 tstruct \
529 \
530 { assign; } \
531 \
532 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
533 trace_nowake_buffer_unlock_commit(buffer, \
534 event, irq_flags, pc); \
535}
536/*
537 * The ftrace_test_probe is compiled out, it is only here as a build time check
538 * to make sure that if the tracepoint handling changes, the ftrace probe will
539 * fail to compile unless it too is updated.
540 */
541
542#undef DEFINE_EVENT
543#define DEFINE_EVENT(template, call, proto, args) \
544static inline void ftrace_test_probe_##call(void) \
545{ \
546 check_trace_callback_type_##call(ftrace_raw_event_##template); \
547}
548
549#undef DEFINE_EVENT_PRINT
550#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
551
552#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
553
554#undef __entry
555#define __entry REC
556
557#undef __print_flags
558#undef __print_symbolic
559#undef __get_dynamic_array
560#undef __get_str
561
562#undef TP_printk
563#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
564
565#undef DECLARE_EVENT_CLASS
566#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
567_TRACE_PERF_PROTO(call, PARAMS(proto)); \
568static const char print_fmt_##call[] = print; \
569static struct ftrace_event_class __used event_class_##call = { \
570 .system = __stringify(TRACE_SYSTEM), \
571 .define_fields = ftrace_define_fields_##call, \
572 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
573 .raw_init = trace_event_raw_init, \
574 .probe = ftrace_raw_event_##call, \
575 .reg = ftrace_event_reg, \
576 _TRACE_PERF_INIT(call) \
577};
578
579#undef DEFINE_EVENT
580#define DEFINE_EVENT(template, call, proto, args) \
581 \
582static struct ftrace_event_call __used \
583__attribute__((__aligned__(4))) \
584__attribute__((section("_ftrace_events"))) event_##call = { \
585 .name = #call, \
586 .class = &event_class_##template, \
587 .event.funcs = &ftrace_event_type_funcs_##template, \
588 .print_fmt = print_fmt_##template, \
589};
590
591#undef DEFINE_EVENT_PRINT
592#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
593 \
594static const char print_fmt_##call[] = print; \
595 \
596static struct ftrace_event_call __used \
597__attribute__((__aligned__(4))) \
598__attribute__((section("_ftrace_events"))) event_##call = { \
599 .name = #call, \
600 .class = &event_class_##template, \
601 .event.funcs = &ftrace_event_type_funcs_##call, \
602 .print_fmt = print_fmt_##call, \
603}
604
605#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
606
607/*
608 * Define the insertion callback to perf events
609 *
610 * The job is very similar to ftrace_raw_event_<call> except that we don't
611 * insert in the ring buffer but in a perf counter.
612 *
613 * static void ftrace_perf_<call>(proto)
614 * {
615 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
616 * struct ftrace_event_call *event_call = &event_<call>;
617 * extern void perf_tp_event(int, u64, u64, void *, int);
618 * struct ftrace_raw_##call *entry;
619 * struct perf_trace_buf *trace_buf;
620 * u64 __addr = 0, __count = 1;
621 * unsigned long irq_flags;
622 * struct trace_entry *ent;
623 * int __entry_size;
624 * int __data_size;
625 * int __cpu
626 * int pc;
627 *
628 * pc = preempt_count();
629 *
630 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
631 *
632 * // Below we want to get the aligned size by taking into account
633 * // the u32 field that will later store the buffer size
634 * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
635 * sizeof(u64));
636 * __entry_size -= sizeof(u32);
637 *
638 * // Protect the non nmi buffer
639 * // This also protects the rcu read side
640 * local_irq_save(irq_flags);
641 * __cpu = smp_processor_id();
642 *
643 * if (in_nmi())
644 * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
645 * else
646 * trace_buf = rcu_dereference_sched(perf_trace_buf);
647 *
648 * if (!trace_buf)
649 * goto end;
650 *
651 * trace_buf = per_cpu_ptr(trace_buf, __cpu);
652 *
653 * // Avoid recursion from perf that could mess up the buffer
654 * if (trace_buf->recursion++)
655 * goto end_recursion;
656 *
657 * raw_data = trace_buf->buf;
658 *
659 * // Make recursion update visible before entering perf_tp_event
660 * // so that we protect from perf recursions.
661 *
662 * barrier();
663 *
664 * //zero dead bytes from alignment to avoid stack leak to userspace:
665 * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
666 * entry = (struct ftrace_raw_<call> *)raw_data;
667 * ent = &entry->ent;
668 * tracing_generic_entry_update(ent, irq_flags, pc);
669 * ent->type = event_call->id;
670 *
671 * <tstruct> <- do some jobs with dynamic arrays
672 *
673 * <assign> <- affect our values
674 *
675 * perf_tp_event(event_call->id, __addr, __count, entry,
676 * __entry_size); <- submit them to perf counter
677 *
678 * }
679 */
680
681#ifdef CONFIG_PERF_EVENTS
682
683#undef __entry
684#define __entry entry
685
686#undef __get_dynamic_array
687#define __get_dynamic_array(field) \
688 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
689
690#undef __get_str
691#define __get_str(field) (char *)__get_dynamic_array(field)
692
693#undef __perf_addr
694#define __perf_addr(a) __addr = (a)
695
696#undef __perf_count
697#define __perf_count(c) __count = (c)
698
699#undef DECLARE_EVENT_CLASS
700#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
701static notrace void \
702perf_trace_##call(void *__data, proto) \
703{ \
704 struct ftrace_event_call *event_call = __data; \
705 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
706 struct ftrace_raw_##call *entry; \
707 struct pt_regs __regs; \
708 u64 __addr = 0, __count = 1; \
709 struct hlist_head *head; \
710 int __entry_size; \
711 int __data_size; \
712 int rctx; \
713 \
714 perf_fetch_caller_regs(&__regs); \
715 \
716 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
717 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
718 sizeof(u64)); \
719 __entry_size -= sizeof(u32); \
720 \
721 if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
722 "profile buffer not large enough")) \
723 return; \
724 \
725 entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
726 __entry_size, event_call->event.type, &__regs, &rctx); \
727 if (!entry) \
728 return; \
729 \
730 tstruct \
731 \
732 { assign; } \
733 \
734 head = this_cpu_ptr(event_call->perf_events); \
735 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
736 __count, &__regs, head); \
737}
738
739/*
740 * This part is compiled out, it is only here as a build time check
741 * to make sure that if the tracepoint handling changes, the
742 * perf probe will fail to compile unless it too is updated.
743 */
744#undef DEFINE_EVENT
745#define DEFINE_EVENT(template, call, proto, args) \
746static inline void perf_test_probe_##call(void) \
747{ \
748 check_trace_callback_type_##call(perf_trace_##template); \
749}
750
751
752#undef DEFINE_EVENT_PRINT
753#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
754 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
755
756#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
757#endif /* CONFIG_PERF_EVENTS */
758
759#undef _TRACE_PROFILE_INIT
760