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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_symbolic_u64
209#if BITS_PER_LONG == 32
210#define __print_symbolic_u64(value, symbol_array...) \
211 ({ \
212 static const struct trace_print_flags_u64 symbols[] = \
213 { symbol_array, { -1, NULL } }; \
214 ftrace_print_symbols_seq_u64(p, value, symbols); \
215 })
216#else
217#define __print_symbolic_u64(value, symbol_array...) \
218 __print_symbolic(value, symbol_array)
219#endif
220
221#undef __print_hex
222#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
223
224#undef DECLARE_EVENT_CLASS
225#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
226static notrace enum print_line_t \
227ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
228 struct trace_event *trace_event) \
229{ \
230 struct ftrace_event_call *event; \
231 struct trace_seq *s = &iter->seq; \
232 struct ftrace_raw_##call *field; \
233 struct trace_entry *entry; \
234 struct trace_seq *p = &iter->tmp_seq; \
235 int ret; \
236 \
237 event = container_of(trace_event, struct ftrace_event_call, \
238 event); \
239 \
240 entry = iter->ent; \
241 \
242 if (entry->type != event->event.type) { \
243 WARN_ON_ONCE(1); \
244 return TRACE_TYPE_UNHANDLED; \
245 } \
246 \
247 field = (typeof(field))entry; \
248 \
249 trace_seq_init(p); \
250 ret = trace_seq_printf(s, "%s: ", event->name); \
251 if (ret) \
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 \
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, strlen(src) + 1)
383
384#undef DECLARE_EVENT_CLASS
385#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
386static inline notrace int ftrace_get_offsets_##call( \
387 struct ftrace_data_offsets_##call *__data_offsets, proto) \
388{ \
389 int __data_size = 0; \
390 struct ftrace_raw_##call __maybe_unused *entry; \
391 \
392 tstruct; \
393 \
394 return __data_size; \
395}
396
397#undef DEFINE_EVENT
398#define DEFINE_EVENT(template, name, proto, args)
399
400#undef DEFINE_EVENT_PRINT
401#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
402 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
403
404#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
405
406/*
407 * Stage 4 of the trace events.
408 *
409 * Override the macros in <trace/trace_events.h> to include the following:
410 *
411 * For those macros defined with TRACE_EVENT:
412 *
413 * static struct ftrace_event_call event_<call>;
414 *
415 * static void ftrace_raw_event_<call>(void *__data, proto)
416 * {
417 * struct ftrace_event_call *event_call = __data;
418 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
419 * struct ring_buffer_event *event;
420 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
421 * struct ring_buffer *buffer;
422 * unsigned long irq_flags;
423 * int __data_size;
424 * int pc;
425 *
426 * local_save_flags(irq_flags);
427 * pc = preempt_count();
428 *
429 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
430 *
431 * event = trace_current_buffer_lock_reserve(&buffer,
432 * event_<call>->event.type,
433 * sizeof(*entry) + __data_size,
434 * irq_flags, pc);
435 * if (!event)
436 * return;
437 * entry = ring_buffer_event_data(event);
438 *
439 * { <assign>; } <-- Here we assign the entries by the __field and
440 * __array macros.
441 *
442 * if (!filter_current_check_discard(buffer, event_call, entry, event))
443 * trace_current_buffer_unlock_commit(buffer,
444 * event, irq_flags, pc);
445 * }
446 *
447 * static struct trace_event ftrace_event_type_<call> = {
448 * .trace = ftrace_raw_output_<call>, <-- stage 2
449 * };
450 *
451 * static const char print_fmt_<call>[] = <TP_printk>;
452 *
453 * static struct ftrace_event_class __used event_class_<template> = {
454 * .system = "<system>",
455 * .define_fields = ftrace_define_fields_<call>,
456 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
457 * .raw_init = trace_event_raw_init,
458 * .probe = ftrace_raw_event_##call,
459 * .reg = ftrace_event_reg,
460 * };
461 *
462 * static struct ftrace_event_call event_<call> = {
463 * .name = "<call>",
464 * .class = event_class_<template>,
465 * .event = &ftrace_event_type_<call>,
466 * .print_fmt = print_fmt_<call>,
467 * };
468 * // its only safe to use pointers when doing linker tricks to
469 * // create an array.
470 * static struct ftrace_event_call __used
471 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
472 *
473 */
474
475#ifdef CONFIG_PERF_EVENTS
476
477#define _TRACE_PERF_PROTO(call, proto) \
478 static notrace void \
479 perf_trace_##call(void *__data, proto);
480
481#define _TRACE_PERF_INIT(call) \
482 .perf_probe = perf_trace_##call,
483
484#else
485#define _TRACE_PERF_PROTO(call, proto)
486#define _TRACE_PERF_INIT(call)
487#endif /* CONFIG_PERF_EVENTS */
488
489#undef __entry
490#define __entry entry
491
492#undef __field
493#define __field(type, item)
494
495#undef __array
496#define __array(type, item, len)
497
498#undef __dynamic_array
499#define __dynamic_array(type, item, len) \
500 __entry->__data_loc_##item = __data_offsets.item;
501
502#undef __string
503#define __string(item, src) __dynamic_array(char, item, -1) \
504
505#undef __assign_str
506#define __assign_str(dst, src) \
507 strcpy(__get_str(dst), src);
508
509#undef TP_fast_assign
510#define TP_fast_assign(args...) args
511
512#undef TP_perf_assign
513#define TP_perf_assign(args...)
514
515#undef DECLARE_EVENT_CLASS
516#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
517 \
518static notrace void \
519ftrace_raw_event_##call(void *__data, proto) \
520{ \
521 struct ftrace_event_call *event_call = __data; \
522 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
523 struct ring_buffer_event *event; \
524 struct ftrace_raw_##call *entry; \
525 struct ring_buffer *buffer; \
526 unsigned long irq_flags; \
527 int __data_size; \
528 int pc; \
529 \
530 local_save_flags(irq_flags); \
531 pc = preempt_count(); \
532 \
533 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
534 \
535 event = trace_current_buffer_lock_reserve(&buffer, \
536 event_call->event.type, \
537 sizeof(*entry) + __data_size, \
538 irq_flags, pc); \
539 if (!event) \
540 return; \
541 entry = ring_buffer_event_data(event); \
542 \
543 tstruct \
544 \
545 { assign; } \
546 \
547 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
548 trace_nowake_buffer_unlock_commit(buffer, \
549 event, irq_flags, pc); \
550}
551/*
552 * The ftrace_test_probe is compiled out, it is only here as a build time check
553 * to make sure that if the tracepoint handling changes, the ftrace probe will
554 * fail to compile unless it too is updated.
555 */
556
557#undef DEFINE_EVENT
558#define DEFINE_EVENT(template, call, proto, args) \
559static inline void ftrace_test_probe_##call(void) \
560{ \
561 check_trace_callback_type_##call(ftrace_raw_event_##template); \
562}
563
564#undef DEFINE_EVENT_PRINT
565#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
566
567#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
568
569#undef __entry
570#define __entry REC
571
572#undef __print_flags
573#undef __print_symbolic
574#undef __get_dynamic_array
575#undef __get_str
576
577#undef TP_printk
578#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
579
580#undef DECLARE_EVENT_CLASS
581#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
582_TRACE_PERF_PROTO(call, PARAMS(proto)); \
583static const char print_fmt_##call[] = print; \
584static struct ftrace_event_class __used event_class_##call = { \
585 .system = __stringify(TRACE_SYSTEM), \
586 .define_fields = ftrace_define_fields_##call, \
587 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
588 .raw_init = trace_event_raw_init, \
589 .probe = ftrace_raw_event_##call, \
590 .reg = ftrace_event_reg, \
591 _TRACE_PERF_INIT(call) \
592};
593
594#undef DEFINE_EVENT
595#define DEFINE_EVENT(template, call, proto, args) \
596 \
597static struct ftrace_event_call __used event_##call = { \
598 .name = #call, \
599 .class = &event_class_##template, \
600 .event.funcs = &ftrace_event_type_funcs_##template, \
601 .print_fmt = print_fmt_##template, \
602}; \
603static struct ftrace_event_call __used \
604__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
605
606#undef DEFINE_EVENT_PRINT
607#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
608 \
609static const char print_fmt_##call[] = print; \
610 \
611static struct ftrace_event_call __used event_##call = { \
612 .name = #call, \
613 .class = &event_class_##template, \
614 .event.funcs = &ftrace_event_type_funcs_##call, \
615 .print_fmt = print_fmt_##call, \
616}; \
617static struct ftrace_event_call __used \
618__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
619
620#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
621
622/*
623 * Define the insertion callback to perf events
624 *
625 * The job is very similar to ftrace_raw_event_<call> except that we don't
626 * insert in the ring buffer but in a perf counter.
627 *
628 * static void ftrace_perf_<call>(proto)
629 * {
630 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
631 * struct ftrace_event_call *event_call = &event_<call>;
632 * extern void perf_tp_event(int, u64, u64, void *, int);
633 * struct ftrace_raw_##call *entry;
634 * struct perf_trace_buf *trace_buf;
635 * u64 __addr = 0, __count = 1;
636 * unsigned long irq_flags;
637 * struct trace_entry *ent;
638 * int __entry_size;
639 * int __data_size;
640 * int __cpu
641 * int pc;
642 *
643 * pc = preempt_count();
644 *
645 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
646 *
647 * // Below we want to get the aligned size by taking into account
648 * // the u32 field that will later store the buffer size
649 * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
650 * sizeof(u64));
651 * __entry_size -= sizeof(u32);
652 *
653 * // Protect the non nmi buffer
654 * // This also protects the rcu read side
655 * local_irq_save(irq_flags);
656 * __cpu = smp_processor_id();
657 *
658 * if (in_nmi())
659 * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
660 * else
661 * trace_buf = rcu_dereference_sched(perf_trace_buf);
662 *
663 * if (!trace_buf)
664 * goto end;
665 *
666 * trace_buf = per_cpu_ptr(trace_buf, __cpu);
667 *
668 * // Avoid recursion from perf that could mess up the buffer
669 * if (trace_buf->recursion++)
670 * goto end_recursion;
671 *
672 * raw_data = trace_buf->buf;
673 *
674 * // Make recursion update visible before entering perf_tp_event
675 * // so that we protect from perf recursions.
676 *
677 * barrier();
678 *
679 * //zero dead bytes from alignment to avoid stack leak to userspace:
680 * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
681 * entry = (struct ftrace_raw_<call> *)raw_data;
682 * ent = &entry->ent;
683 * tracing_generic_entry_update(ent, irq_flags, pc);
684 * ent->type = event_call->id;
685 *
686 * <tstruct> <- do some jobs with dynamic arrays
687 *
688 * <assign> <- affect our values
689 *
690 * perf_tp_event(event_call->id, __addr, __count, entry,
691 * __entry_size); <- submit them to perf counter
692 *
693 * }
694 */
695
696#ifdef CONFIG_PERF_EVENTS
697
698#undef __entry
699#define __entry entry
700
701#undef __get_dynamic_array
702#define __get_dynamic_array(field) \
703 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
704
705#undef __get_str
706#define __get_str(field) (char *)__get_dynamic_array(field)
707
708#undef __perf_addr
709#define __perf_addr(a) __addr = (a)
710
711#undef __perf_count
712#define __perf_count(c) __count = (c)
713
714#undef DECLARE_EVENT_CLASS
715#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
716static notrace void \
717perf_trace_##call(void *__data, proto) \
718{ \
719 struct ftrace_event_call *event_call = __data; \
720 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
721 struct ftrace_raw_##call *entry; \
722 struct pt_regs __regs; \
723 u64 __addr = 0, __count = 1; \
724 struct hlist_head *head; \
725 int __entry_size; \
726 int __data_size; \
727 int rctx; \
728 \
729 perf_fetch_caller_regs(&__regs); \
730 \
731 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
732 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
733 sizeof(u64)); \
734 __entry_size -= sizeof(u32); \
735 \
736 if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
737 "profile buffer not large enough")) \
738 return; \
739 \
740 entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
741 __entry_size, event_call->event.type, &__regs, &rctx); \
742 if (!entry) \
743 return; \
744 \
745 tstruct \
746 \
747 { assign; } \
748 \
749 head = this_cpu_ptr(event_call->perf_events); \
750 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
751 __count, &__regs, head); \
752}
753
754/*
755 * This part is compiled out, it is only here as a build time check
756 * to make sure that if the tracepoint handling changes, the
757 * perf probe will fail to compile unless it too is updated.
758 */
759#undef DEFINE_EVENT
760#define DEFINE_EVENT(template, call, proto, args) \
761static inline void perf_test_probe_##call(void) \
762{ \
763 check_trace_callback_type_##call(perf_trace_##template); \
764}
765
766
767#undef DEFINE_EVENT_PRINT
768#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
769 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
770
771#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
772#endif /* CONFIG_PERF_EVENTS */
773
774#undef _TRACE_PROFILE_INIT
775
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 ftrace_raw_##template *field; \
269 struct trace_entry *entry; \
270 struct trace_seq *p = &iter->tmp_seq; \
271 \
272 entry = iter->ent; \
273 \
274 if (entry->type != event_##call.event.type) { \
275 WARN_ON_ONCE(1); \
276 return TRACE_TYPE_UNHANDLED; \
277 } \
278 \
279 field = (typeof(field))entry; \
280 \
281 trace_seq_init(p); \
282 return ftrace_output_call(iter, #call, print); \
283} \
284static struct trace_event_functions ftrace_event_type_funcs_##call = { \
285 .trace = ftrace_raw_output_##call, \
286};
287
288#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
289
290#undef __field_ext
291#define __field_ext(type, item, filter_type) \
292 ret = trace_define_field(event_call, #type, #item, \
293 offsetof(typeof(field), item), \
294 sizeof(field.item), \
295 is_signed_type(type), filter_type); \
296 if (ret) \
297 return ret;
298
299#undef __field
300#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
301
302#undef __array
303#define __array(type, item, len) \
304 do { \
305 char *type_str = #type"["__stringify(len)"]"; \
306 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
307 ret = trace_define_field(event_call, type_str, #item, \
308 offsetof(typeof(field), item), \
309 sizeof(field.item), \
310 is_signed_type(type), FILTER_OTHER); \
311 if (ret) \
312 return ret; \
313 } while (0);
314
315#undef __dynamic_array
316#define __dynamic_array(type, item, len) \
317 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
318 offsetof(typeof(field), __data_loc_##item), \
319 sizeof(field.__data_loc_##item), \
320 is_signed_type(type), FILTER_OTHER);
321
322#undef __string
323#define __string(item, src) __dynamic_array(char, item, -1)
324
325#undef DECLARE_EVENT_CLASS
326#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
327static int notrace __init \
328ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
329{ \
330 struct ftrace_raw_##call field; \
331 int ret; \
332 \
333 tstruct; \
334 \
335 return ret; \
336}
337
338#undef DEFINE_EVENT
339#define DEFINE_EVENT(template, name, proto, args)
340
341#undef DEFINE_EVENT_PRINT
342#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
343 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
344
345#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
346
347/*
348 * remember the offset of each array from the beginning of the event.
349 */
350
351#undef __entry
352#define __entry entry
353
354#undef __field
355#define __field(type, item)
356
357#undef __field_ext
358#define __field_ext(type, item, filter_type)
359
360#undef __array
361#define __array(type, item, len)
362
363#undef __dynamic_array
364#define __dynamic_array(type, item, len) \
365 __item_length = (len) * sizeof(type); \
366 __data_offsets->item = __data_size + \
367 offsetof(typeof(*entry), __data); \
368 __data_offsets->item |= __item_length << 16; \
369 __data_size += __item_length;
370
371#undef __string
372#define __string(item, src) __dynamic_array(char, item, \
373 strlen((src) ? (const char *)(src) : "(null)") + 1)
374
375#undef DECLARE_EVENT_CLASS
376#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
377static inline notrace int ftrace_get_offsets_##call( \
378 struct ftrace_data_offsets_##call *__data_offsets, proto) \
379{ \
380 int __data_size = 0; \
381 int __maybe_unused __item_length; \
382 struct ftrace_raw_##call __maybe_unused *entry; \
383 \
384 tstruct; \
385 \
386 return __data_size; \
387}
388
389#undef DEFINE_EVENT
390#define DEFINE_EVENT(template, name, proto, args)
391
392#undef DEFINE_EVENT_PRINT
393#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
394 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
395
396#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
397
398/*
399 * Stage 4 of the trace events.
400 *
401 * Override the macros in <trace/trace_events.h> to include the following:
402 *
403 * For those macros defined with TRACE_EVENT:
404 *
405 * static struct ftrace_event_call event_<call>;
406 *
407 * static void ftrace_raw_event_<call>(void *__data, proto)
408 * {
409 * struct ftrace_event_file *ftrace_file = __data;
410 * struct ftrace_event_call *event_call = ftrace_file->event_call;
411 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
412 * unsigned long eflags = ftrace_file->flags;
413 * enum event_trigger_type __tt = ETT_NONE;
414 * struct ring_buffer_event *event;
415 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
416 * struct ring_buffer *buffer;
417 * unsigned long irq_flags;
418 * int __data_size;
419 * int pc;
420 *
421 * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
422 * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
423 * event_triggers_call(ftrace_file, NULL);
424 * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
425 * return;
426 * }
427 *
428 * local_save_flags(irq_flags);
429 * pc = preempt_count();
430 *
431 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
432 *
433 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
434 * event_<call>->event.type,
435 * sizeof(*entry) + __data_size,
436 * irq_flags, pc);
437 * if (!event)
438 * return;
439 * entry = ring_buffer_event_data(event);
440 *
441 * { <assign>; } <-- Here we assign the entries by the __field and
442 * __array macros.
443 *
444 * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
445 * __tt = event_triggers_call(ftrace_file, entry);
446 *
447 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
448 * &ftrace_file->flags))
449 * ring_buffer_discard_commit(buffer, event);
450 * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
451 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
452 *
453 * if (__tt)
454 * event_triggers_post_call(ftrace_file, __tt);
455 * }
456 *
457 * static struct trace_event ftrace_event_type_<call> = {
458 * .trace = ftrace_raw_output_<call>, <-- stage 2
459 * };
460 *
461 * static const char print_fmt_<call>[] = <TP_printk>;
462 *
463 * static struct ftrace_event_class __used event_class_<template> = {
464 * .system = "<system>",
465 * .define_fields = ftrace_define_fields_<call>,
466 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
467 * .raw_init = trace_event_raw_init,
468 * .probe = ftrace_raw_event_##call,
469 * .reg = ftrace_event_reg,
470 * };
471 *
472 * static struct ftrace_event_call event_<call> = {
473 * .class = event_class_<template>,
474 * {
475 * .tp = &__tracepoint_<call>,
476 * },
477 * .event = &ftrace_event_type_<call>,
478 * .print_fmt = print_fmt_<call>,
479 * .flags = TRACE_EVENT_FL_TRACEPOINT,
480 * };
481 * // its only safe to use pointers when doing linker tricks to
482 * // create an array.
483 * static struct ftrace_event_call __used
484 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
485 *
486 */
487
488#ifdef CONFIG_PERF_EVENTS
489
490#define _TRACE_PERF_PROTO(call, proto) \
491 static notrace void \
492 perf_trace_##call(void *__data, proto);
493
494#define _TRACE_PERF_INIT(call) \
495 .perf_probe = perf_trace_##call,
496
497#else
498#define _TRACE_PERF_PROTO(call, proto)
499#define _TRACE_PERF_INIT(call)
500#endif /* CONFIG_PERF_EVENTS */
501
502#undef __entry
503#define __entry entry
504
505#undef __field
506#define __field(type, item)
507
508#undef __array
509#define __array(type, item, len)
510
511#undef __dynamic_array
512#define __dynamic_array(type, item, len) \
513 __entry->__data_loc_##item = __data_offsets.item;
514
515#undef __string
516#define __string(item, src) __dynamic_array(char, item, -1) \
517
518#undef __assign_str
519#define __assign_str(dst, src) \
520 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
521
522#undef TP_fast_assign
523#define TP_fast_assign(args...) args
524
525#undef __perf_addr
526#define __perf_addr(a) (a)
527
528#undef __perf_count
529#define __perf_count(c) (c)
530
531#undef __perf_task
532#define __perf_task(t) (t)
533
534#undef DECLARE_EVENT_CLASS
535#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
536 \
537static notrace void \
538ftrace_raw_event_##call(void *__data, proto) \
539{ \
540 struct ftrace_event_file *ftrace_file = __data; \
541 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
542 struct ftrace_event_buffer fbuffer; \
543 struct ftrace_raw_##call *entry; \
544 int __data_size; \
545 \
546 if (ftrace_trigger_soft_disabled(ftrace_file)) \
547 return; \
548 \
549 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
550 \
551 entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
552 sizeof(*entry) + __data_size); \
553 \
554 if (!entry) \
555 return; \
556 \
557 tstruct \
558 \
559 { assign; } \
560 \
561 ftrace_event_buffer_commit(&fbuffer); \
562}
563/*
564 * The ftrace_test_probe is compiled out, it is only here as a build time check
565 * to make sure that if the tracepoint handling changes, the ftrace probe will
566 * fail to compile unless it too is updated.
567 */
568
569#undef DEFINE_EVENT
570#define DEFINE_EVENT(template, call, proto, args) \
571static inline void ftrace_test_probe_##call(void) \
572{ \
573 check_trace_callback_type_##call(ftrace_raw_event_##template); \
574}
575
576#undef DEFINE_EVENT_PRINT
577#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
578
579#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
580
581#undef __entry
582#define __entry REC
583
584#undef __print_flags
585#undef __print_symbolic
586#undef __print_hex
587#undef __get_dynamic_array
588#undef __get_str
589
590#undef TP_printk
591#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
592
593#undef DECLARE_EVENT_CLASS
594#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
595_TRACE_PERF_PROTO(call, PARAMS(proto)); \
596static const char print_fmt_##call[] = print; \
597static struct ftrace_event_class __used __refdata event_class_##call = { \
598 .system = __stringify(TRACE_SYSTEM), \
599 .define_fields = ftrace_define_fields_##call, \
600 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
601 .raw_init = trace_event_raw_init, \
602 .probe = ftrace_raw_event_##call, \
603 .reg = ftrace_event_reg, \
604 _TRACE_PERF_INIT(call) \
605};
606
607#undef DEFINE_EVENT
608#define DEFINE_EVENT(template, call, proto, args) \
609 \
610static struct ftrace_event_call __used event_##call = { \
611 .class = &event_class_##template, \
612 { \
613 .tp = &__tracepoint_##call, \
614 }, \
615 .event.funcs = &ftrace_event_type_funcs_##template, \
616 .print_fmt = print_fmt_##template, \
617 .flags = TRACE_EVENT_FL_TRACEPOINT, \
618}; \
619static struct ftrace_event_call __used \
620__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
621
622#undef DEFINE_EVENT_PRINT
623#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
624 \
625static const char print_fmt_##call[] = print; \
626 \
627static struct ftrace_event_call __used event_##call = { \
628 .class = &event_class_##template, \
629 { \
630 .tp = &__tracepoint_##call, \
631 }, \
632 .event.funcs = &ftrace_event_type_funcs_##call, \
633 .print_fmt = print_fmt_##call, \
634 .flags = TRACE_EVENT_FL_TRACEPOINT, \
635}; \
636static struct ftrace_event_call __used \
637__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
638
639#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
640
641
642#ifdef CONFIG_PERF_EVENTS
643
644#undef __entry
645#define __entry entry
646
647#undef __get_dynamic_array
648#define __get_dynamic_array(field) \
649 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
650
651#undef __get_str
652#define __get_str(field) (char *)__get_dynamic_array(field)
653
654#undef __perf_addr
655#define __perf_addr(a) (__addr = (a))
656
657#undef __perf_count
658#define __perf_count(c) (__count = (c))
659
660#undef __perf_task
661#define __perf_task(t) (__task = (t))
662
663#undef DECLARE_EVENT_CLASS
664#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
665static notrace void \
666perf_trace_##call(void *__data, proto) \
667{ \
668 struct ftrace_event_call *event_call = __data; \
669 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
670 struct ftrace_raw_##call *entry; \
671 struct pt_regs __regs; \
672 u64 __addr = 0, __count = 1; \
673 struct task_struct *__task = NULL; \
674 struct hlist_head *head; \
675 int __entry_size; \
676 int __data_size; \
677 int rctx; \
678 \
679 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
680 \
681 head = this_cpu_ptr(event_call->perf_events); \
682 if (__builtin_constant_p(!__task) && !__task && \
683 hlist_empty(head)) \
684 return; \
685 \
686 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
687 sizeof(u64)); \
688 __entry_size -= sizeof(u32); \
689 \
690 perf_fetch_caller_regs(&__regs); \
691 entry = perf_trace_buf_prepare(__entry_size, \
692 event_call->event.type, &__regs, &rctx); \
693 if (!entry) \
694 return; \
695 \
696 tstruct \
697 \
698 { assign; } \
699 \
700 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
701 __count, &__regs, head, __task); \
702}
703
704/*
705 * This part is compiled out, it is only here as a build time check
706 * to make sure that if the tracepoint handling changes, the
707 * perf probe will fail to compile unless it too is updated.
708 */
709#undef DEFINE_EVENT
710#define DEFINE_EVENT(template, call, proto, args) \
711static inline void perf_test_probe_##call(void) \
712{ \
713 check_trace_callback_type_##call(perf_trace_##template); \
714}
715
716
717#undef DEFINE_EVENT_PRINT
718#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
719 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
720
721#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
722#endif /* CONFIG_PERF_EVENTS */
723