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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Stage 1 of the trace events.
4 *
5 * Override the macros in the event tracepoint header <trace/events/XXX.h>
6 * to include the following:
7 *
8 * struct trace_event_raw_<call> {
9 * struct trace_entry ent;
10 * <type> <item>;
11 * <type2> <item2>[<len>];
12 * [...]
13 * };
14 *
15 * The <type> <item> is created by the __field(type, item) macro or
16 * the __array(type2, item2, len) macro.
17 * We simply do "type item;", and that will create the fields
18 * in the structure.
19 */
20
21#include <linux/trace_events.h>
22
23#ifndef TRACE_SYSTEM_VAR
24#define TRACE_SYSTEM_VAR TRACE_SYSTEM
25#endif
26
27#define __app__(x, y) str__##x##y
28#define __app(x, y) __app__(x, y)
29
30#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
31
32#define TRACE_MAKE_SYSTEM_STR() \
33 static const char TRACE_SYSTEM_STRING[] = \
34 __stringify(TRACE_SYSTEM)
35
36TRACE_MAKE_SYSTEM_STR();
37
38#undef TRACE_DEFINE_ENUM
39#define TRACE_DEFINE_ENUM(a) \
40 static struct trace_eval_map __used __initdata \
41 __##TRACE_SYSTEM##_##a = \
42 { \
43 .system = TRACE_SYSTEM_STRING, \
44 .eval_string = #a, \
45 .eval_value = a \
46 }; \
47 static struct trace_eval_map __used \
48 __attribute__((section("_ftrace_eval_map"))) \
49 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
50
51#undef TRACE_DEFINE_SIZEOF
52#define TRACE_DEFINE_SIZEOF(a) \
53 static struct trace_eval_map __used __initdata \
54 __##TRACE_SYSTEM##_##a = \
55 { \
56 .system = TRACE_SYSTEM_STRING, \
57 .eval_string = "sizeof(" #a ")", \
58 .eval_value = sizeof(a) \
59 }; \
60 static struct trace_eval_map __used \
61 __attribute__((section("_ftrace_eval_map"))) \
62 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
63
64/*
65 * DECLARE_EVENT_CLASS can be used to add a generic function
66 * handlers for events. That is, if all events have the same
67 * parameters and just have distinct trace points.
68 * Each tracepoint can be defined with DEFINE_EVENT and that
69 * will map the DECLARE_EVENT_CLASS to the tracepoint.
70 *
71 * TRACE_EVENT is a one to one mapping between tracepoint and template.
72 */
73#undef TRACE_EVENT
74#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
75 DECLARE_EVENT_CLASS(name, \
76 PARAMS(proto), \
77 PARAMS(args), \
78 PARAMS(tstruct), \
79 PARAMS(assign), \
80 PARAMS(print)); \
81 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
82
83
84#undef __field
85#define __field(type, item) type item;
86
87#undef __field_ext
88#define __field_ext(type, item, filter_type) type item;
89
90#undef __field_struct
91#define __field_struct(type, item) type item;
92
93#undef __field_struct_ext
94#define __field_struct_ext(type, item, filter_type) type item;
95
96#undef __array
97#define __array(type, item, len) type item[len];
98
99#undef __dynamic_array
100#define __dynamic_array(type, item, len) u32 __data_loc_##item;
101
102#undef __string
103#define __string(item, src) __dynamic_array(char, item, -1)
104
105#undef __bitmask
106#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
107
108#undef TP_STRUCT__entry
109#define TP_STRUCT__entry(args...) args
110
111#undef DECLARE_EVENT_CLASS
112#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
113 struct trace_event_raw_##name { \
114 struct trace_entry ent; \
115 tstruct \
116 char __data[0]; \
117 }; \
118 \
119 static struct trace_event_class event_class_##name;
120
121#undef DEFINE_EVENT
122#define DEFINE_EVENT(template, name, proto, args) \
123 static struct trace_event_call __used \
124 __attribute__((__aligned__(4))) event_##name
125
126#undef DEFINE_EVENT_FN
127#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
128 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
129
130#undef DEFINE_EVENT_PRINT
131#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
132 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
133
134/* Callbacks are meaningless to ftrace. */
135#undef TRACE_EVENT_FN
136#define TRACE_EVENT_FN(name, proto, args, tstruct, \
137 assign, print, reg, unreg) \
138 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
139 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
140
141#undef TRACE_EVENT_FN_COND
142#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
143 assign, print, reg, unreg) \
144 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
145 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
146
147#undef TRACE_EVENT_FLAGS
148#define TRACE_EVENT_FLAGS(name, value) \
149 __TRACE_EVENT_FLAGS(name, value)
150
151#undef TRACE_EVENT_PERF_PERM
152#define TRACE_EVENT_PERF_PERM(name, expr...) \
153 __TRACE_EVENT_PERF_PERM(name, expr)
154
155#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
156
157/*
158 * Stage 2 of the trace events.
159 *
160 * Include the following:
161 *
162 * struct trace_event_data_offsets_<call> {
163 * u32 <item1>;
164 * u32 <item2>;
165 * [...]
166 * };
167 *
168 * The __dynamic_array() macro will create each u32 <item>, this is
169 * to keep the offset of each array from the beginning of the event.
170 * The size of an array is also encoded, in the higher 16 bits of <item>.
171 */
172
173#undef TRACE_DEFINE_ENUM
174#define TRACE_DEFINE_ENUM(a)
175
176#undef TRACE_DEFINE_SIZEOF
177#define TRACE_DEFINE_SIZEOF(a)
178
179#undef __field
180#define __field(type, item)
181
182#undef __field_ext
183#define __field_ext(type, item, filter_type)
184
185#undef __field_struct
186#define __field_struct(type, item)
187
188#undef __field_struct_ext
189#define __field_struct_ext(type, item, filter_type)
190
191#undef __array
192#define __array(type, item, len)
193
194#undef __dynamic_array
195#define __dynamic_array(type, item, len) u32 item;
196
197#undef __string
198#define __string(item, src) __dynamic_array(char, item, -1)
199
200#undef __bitmask
201#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
202
203#undef DECLARE_EVENT_CLASS
204#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
205 struct trace_event_data_offsets_##call { \
206 tstruct; \
207 };
208
209#undef DEFINE_EVENT
210#define DEFINE_EVENT(template, name, proto, args)
211
212#undef DEFINE_EVENT_PRINT
213#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
214
215#undef TRACE_EVENT_FLAGS
216#define TRACE_EVENT_FLAGS(event, flag)
217
218#undef TRACE_EVENT_PERF_PERM
219#define TRACE_EVENT_PERF_PERM(event, expr...)
220
221#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
222
223/*
224 * Stage 3 of the trace events.
225 *
226 * Override the macros in the event tracepoint header <trace/events/XXX.h>
227 * to include the following:
228 *
229 * enum print_line_t
230 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
231 * {
232 * struct trace_seq *s = &iter->seq;
233 * struct trace_event_raw_<call> *field; <-- defined in stage 1
234 * struct trace_entry *entry;
235 * struct trace_seq *p = &iter->tmp_seq;
236 * int ret;
237 *
238 * entry = iter->ent;
239 *
240 * if (entry->type != event_<call>->event.type) {
241 * WARN_ON_ONCE(1);
242 * return TRACE_TYPE_UNHANDLED;
243 * }
244 *
245 * field = (typeof(field))entry;
246 *
247 * trace_seq_init(p);
248 * ret = trace_seq_printf(s, "%s: ", <call>);
249 * if (ret)
250 * ret = trace_seq_printf(s, <TP_printk> "\n");
251 * if (!ret)
252 * return TRACE_TYPE_PARTIAL_LINE;
253 *
254 * return TRACE_TYPE_HANDLED;
255 * }
256 *
257 * This is the method used to print the raw event to the trace
258 * output format. Note, this is not needed if the data is read
259 * in binary.
260 */
261
262#undef __entry
263#define __entry field
264
265#undef TP_printk
266#define TP_printk(fmt, args...) fmt "\n", args
267
268#undef __get_dynamic_array
269#define __get_dynamic_array(field) \
270 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
271
272#undef __get_dynamic_array_len
273#define __get_dynamic_array_len(field) \
274 ((__entry->__data_loc_##field >> 16) & 0xffff)
275
276#undef __get_str
277#define __get_str(field) ((char *)__get_dynamic_array(field))
278
279#undef __get_bitmask
280#define __get_bitmask(field) \
281 ({ \
282 void *__bitmask = __get_dynamic_array(field); \
283 unsigned int __bitmask_size; \
284 __bitmask_size = __get_dynamic_array_len(field); \
285 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
286 })
287
288#undef __print_flags
289#define __print_flags(flag, delim, flag_array...) \
290 ({ \
291 static const struct trace_print_flags __flags[] = \
292 { flag_array, { -1, NULL }}; \
293 trace_print_flags_seq(p, delim, flag, __flags); \
294 })
295
296#undef __print_symbolic
297#define __print_symbolic(value, symbol_array...) \
298 ({ \
299 static const struct trace_print_flags symbols[] = \
300 { symbol_array, { -1, NULL }}; \
301 trace_print_symbols_seq(p, value, symbols); \
302 })
303
304#undef __print_flags_u64
305#undef __print_symbolic_u64
306#if BITS_PER_LONG == 32
307#define __print_flags_u64(flag, delim, flag_array...) \
308 ({ \
309 static const struct trace_print_flags_u64 __flags[] = \
310 { flag_array, { -1, NULL } }; \
311 trace_print_flags_seq_u64(p, delim, flag, __flags); \
312 })
313
314#define __print_symbolic_u64(value, symbol_array...) \
315 ({ \
316 static const struct trace_print_flags_u64 symbols[] = \
317 { symbol_array, { -1, NULL } }; \
318 trace_print_symbols_seq_u64(p, value, symbols); \
319 })
320#else
321#define __print_flags_u64(flag, delim, flag_array...) \
322 __print_flags(flag, delim, flag_array)
323
324#define __print_symbolic_u64(value, symbol_array...) \
325 __print_symbolic(value, symbol_array)
326#endif
327
328#undef __print_hex
329#define __print_hex(buf, buf_len) \
330 trace_print_hex_seq(p, buf, buf_len, false)
331
332#undef __print_hex_str
333#define __print_hex_str(buf, buf_len) \
334 trace_print_hex_seq(p, buf, buf_len, true)
335
336#undef __print_array
337#define __print_array(array, count, el_size) \
338 ({ \
339 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
340 el_size != 4 && el_size != 8); \
341 trace_print_array_seq(p, array, count, el_size); \
342 })
343
344#undef __print_hex_dump
345#define __print_hex_dump(prefix_str, prefix_type, \
346 rowsize, groupsize, buf, len, ascii) \
347 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \
348 rowsize, groupsize, buf, len, ascii)
349
350#undef DECLARE_EVENT_CLASS
351#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
352static notrace enum print_line_t \
353trace_raw_output_##call(struct trace_iterator *iter, int flags, \
354 struct trace_event *trace_event) \
355{ \
356 struct trace_seq *s = &iter->seq; \
357 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
358 struct trace_event_raw_##call *field; \
359 int ret; \
360 \
361 field = (typeof(field))iter->ent; \
362 \
363 ret = trace_raw_output_prep(iter, trace_event); \
364 if (ret != TRACE_TYPE_HANDLED) \
365 return ret; \
366 \
367 trace_seq_printf(s, print); \
368 \
369 return trace_handle_return(s); \
370} \
371static struct trace_event_functions trace_event_type_funcs_##call = { \
372 .trace = trace_raw_output_##call, \
373};
374
375#undef DEFINE_EVENT_PRINT
376#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
377static notrace enum print_line_t \
378trace_raw_output_##call(struct trace_iterator *iter, int flags, \
379 struct trace_event *event) \
380{ \
381 struct trace_event_raw_##template *field; \
382 struct trace_entry *entry; \
383 struct trace_seq *p = &iter->tmp_seq; \
384 \
385 entry = iter->ent; \
386 \
387 if (entry->type != event_##call.event.type) { \
388 WARN_ON_ONCE(1); \
389 return TRACE_TYPE_UNHANDLED; \
390 } \
391 \
392 field = (typeof(field))entry; \
393 \
394 trace_seq_init(p); \
395 return trace_output_call(iter, #call, print); \
396} \
397static struct trace_event_functions trace_event_type_funcs_##call = { \
398 .trace = trace_raw_output_##call, \
399};
400
401#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
402
403#undef __field_ext
404#define __field_ext(_type, _item, _filter_type) { \
405 .type = #_type, .name = #_item, \
406 .size = sizeof(_type), .align = __alignof__(_type), \
407 .is_signed = is_signed_type(_type), .filter_type = _filter_type },
408
409#undef __field_struct_ext
410#define __field_struct_ext(_type, _item, _filter_type) { \
411 .type = #_type, .name = #_item, \
412 .size = sizeof(_type), .align = __alignof__(_type), \
413 0, .filter_type = _filter_type },
414
415#undef __field
416#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
417
418#undef __field_struct
419#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
420
421#undef __array
422#define __array(_type, _item, _len) { \
423 .type = #_type"["__stringify(_len)"]", .name = #_item, \
424 .size = sizeof(_type[_len]), .align = __alignof__(_type), \
425 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
426
427#undef __dynamic_array
428#define __dynamic_array(_type, _item, _len) { \
429 .type = "__data_loc " #_type "[]", .name = #_item, \
430 .size = 4, .align = 4, \
431 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
432
433#undef __string
434#define __string(item, src) __dynamic_array(char, item, -1)
435
436#undef __bitmask
437#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
438
439#undef DECLARE_EVENT_CLASS
440#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
441static struct trace_event_fields trace_event_fields_##call[] = { \
442 tstruct \
443 {} };
444
445#undef DEFINE_EVENT_PRINT
446#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
447
448#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
449
450/*
451 * remember the offset of each array from the beginning of the event.
452 */
453
454#undef __entry
455#define __entry entry
456
457#undef __field
458#define __field(type, item)
459
460#undef __field_ext
461#define __field_ext(type, item, filter_type)
462
463#undef __field_struct
464#define __field_struct(type, item)
465
466#undef __field_struct_ext
467#define __field_struct_ext(type, item, filter_type)
468
469#undef __array
470#define __array(type, item, len)
471
472#undef __dynamic_array
473#define __dynamic_array(type, item, len) \
474 __item_length = (len) * sizeof(type); \
475 __data_offsets->item = __data_size + \
476 offsetof(typeof(*entry), __data); \
477 __data_offsets->item |= __item_length << 16; \
478 __data_size += __item_length;
479
480#undef __string
481#define __string(item, src) __dynamic_array(char, item, \
482 strlen((src) ? (const char *)(src) : "(null)") + 1)
483
484/*
485 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
486 * num_possible_cpus().
487 */
488#define __bitmask_size_in_bytes_raw(nr_bits) \
489 (((nr_bits) + 7) / 8)
490
491#define __bitmask_size_in_longs(nr_bits) \
492 ((__bitmask_size_in_bytes_raw(nr_bits) + \
493 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
494
495/*
496 * __bitmask_size_in_bytes is the number of bytes needed to hold
497 * num_possible_cpus() padded out to the nearest long. This is what
498 * is saved in the buffer, just to be consistent.
499 */
500#define __bitmask_size_in_bytes(nr_bits) \
501 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
502
503#undef __bitmask
504#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
505 __bitmask_size_in_longs(nr_bits))
506
507#undef DECLARE_EVENT_CLASS
508#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
509static inline notrace int trace_event_get_offsets_##call( \
510 struct trace_event_data_offsets_##call *__data_offsets, proto) \
511{ \
512 int __data_size = 0; \
513 int __maybe_unused __item_length; \
514 struct trace_event_raw_##call __maybe_unused *entry; \
515 \
516 tstruct; \
517 \
518 return __data_size; \
519}
520
521#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
522
523/*
524 * Stage 4 of the trace events.
525 *
526 * Override the macros in the event tracepoint header <trace/events/XXX.h>
527 * to include the following:
528 *
529 * For those macros defined with TRACE_EVENT:
530 *
531 * static struct trace_event_call event_<call>;
532 *
533 * static void trace_event_raw_event_<call>(void *__data, proto)
534 * {
535 * struct trace_event_file *trace_file = __data;
536 * struct trace_event_call *event_call = trace_file->event_call;
537 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
538 * unsigned long eflags = trace_file->flags;
539 * enum event_trigger_type __tt = ETT_NONE;
540 * struct ring_buffer_event *event;
541 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
542 * struct trace_buffer *buffer;
543 * unsigned long irq_flags;
544 * int __data_size;
545 * int pc;
546 *
547 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
548 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
549 * event_triggers_call(trace_file, NULL);
550 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
551 * return;
552 * }
553 *
554 * local_save_flags(irq_flags);
555 * pc = preempt_count();
556 *
557 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
558 *
559 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
560 * event_<call>->event.type,
561 * sizeof(*entry) + __data_size,
562 * irq_flags, pc);
563 * if (!event)
564 * return;
565 * entry = ring_buffer_event_data(event);
566 *
567 * { <assign>; } <-- Here we assign the entries by the __field and
568 * __array macros.
569 *
570 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
571 * __tt = event_triggers_call(trace_file, entry);
572 *
573 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
574 * &trace_file->flags))
575 * ring_buffer_discard_commit(buffer, event);
576 * else if (!filter_check_discard(trace_file, entry, buffer, event))
577 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
578 *
579 * if (__tt)
580 * event_triggers_post_call(trace_file, __tt);
581 * }
582 *
583 * static struct trace_event ftrace_event_type_<call> = {
584 * .trace = trace_raw_output_<call>, <-- stage 2
585 * };
586 *
587 * static char print_fmt_<call>[] = <TP_printk>;
588 *
589 * static struct trace_event_class __used event_class_<template> = {
590 * .system = "<system>",
591 * .fields_array = trace_event_fields_<call>,
592 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
593 * .raw_init = trace_event_raw_init,
594 * .probe = trace_event_raw_event_##call,
595 * .reg = trace_event_reg,
596 * };
597 *
598 * static struct trace_event_call event_<call> = {
599 * .class = event_class_<template>,
600 * {
601 * .tp = &__tracepoint_<call>,
602 * },
603 * .event = &ftrace_event_type_<call>,
604 * .print_fmt = print_fmt_<call>,
605 * .flags = TRACE_EVENT_FL_TRACEPOINT,
606 * };
607 * // its only safe to use pointers when doing linker tricks to
608 * // create an array.
609 * static struct trace_event_call __used
610 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
611 *
612 */
613
614#ifdef CONFIG_PERF_EVENTS
615
616#define _TRACE_PERF_PROTO(call, proto) \
617 static notrace void \
618 perf_trace_##call(void *__data, proto);
619
620#define _TRACE_PERF_INIT(call) \
621 .perf_probe = perf_trace_##call,
622
623#else
624#define _TRACE_PERF_PROTO(call, proto)
625#define _TRACE_PERF_INIT(call)
626#endif /* CONFIG_PERF_EVENTS */
627
628#undef __entry
629#define __entry entry
630
631#undef __field
632#define __field(type, item)
633
634#undef __field_struct
635#define __field_struct(type, item)
636
637#undef __array
638#define __array(type, item, len)
639
640#undef __dynamic_array
641#define __dynamic_array(type, item, len) \
642 __entry->__data_loc_##item = __data_offsets.item;
643
644#undef __string
645#define __string(item, src) __dynamic_array(char, item, -1)
646
647#undef __assign_str
648#define __assign_str(dst, src) \
649 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
650
651#undef __bitmask
652#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
653
654#undef __get_bitmask
655#define __get_bitmask(field) (char *)__get_dynamic_array(field)
656
657#undef __assign_bitmask
658#define __assign_bitmask(dst, src, nr_bits) \
659 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
660
661#undef TP_fast_assign
662#define TP_fast_assign(args...) args
663
664#undef __perf_count
665#define __perf_count(c) (c)
666
667#undef __perf_task
668#define __perf_task(t) (t)
669
670#undef DECLARE_EVENT_CLASS
671#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
672 \
673static notrace void \
674trace_event_raw_event_##call(void *__data, proto) \
675{ \
676 struct trace_event_file *trace_file = __data; \
677 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
678 struct trace_event_buffer fbuffer; \
679 struct trace_event_raw_##call *entry; \
680 int __data_size; \
681 \
682 if (trace_trigger_soft_disabled(trace_file)) \
683 return; \
684 \
685 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
686 \
687 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
688 sizeof(*entry) + __data_size); \
689 \
690 if (!entry) \
691 return; \
692 \
693 tstruct \
694 \
695 { assign; } \
696 \
697 trace_event_buffer_commit(&fbuffer); \
698}
699/*
700 * The ftrace_test_probe is compiled out, it is only here as a build time check
701 * to make sure that if the tracepoint handling changes, the ftrace probe will
702 * fail to compile unless it too is updated.
703 */
704
705#undef DEFINE_EVENT
706#define DEFINE_EVENT(template, call, proto, args) \
707static inline void ftrace_test_probe_##call(void) \
708{ \
709 check_trace_callback_type_##call(trace_event_raw_event_##template); \
710}
711
712#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
713
714#undef __entry
715#define __entry REC
716
717#undef __print_flags
718#undef __print_symbolic
719#undef __print_hex
720#undef __print_hex_str
721#undef __get_dynamic_array
722#undef __get_dynamic_array_len
723#undef __get_str
724#undef __get_bitmask
725#undef __print_array
726#undef __print_hex_dump
727
728#undef TP_printk
729#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
730
731#undef DECLARE_EVENT_CLASS
732#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
733_TRACE_PERF_PROTO(call, PARAMS(proto)); \
734static char print_fmt_##call[] = print; \
735static struct trace_event_class __used __refdata event_class_##call = { \
736 .system = TRACE_SYSTEM_STRING, \
737 .fields_array = trace_event_fields_##call, \
738 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
739 .raw_init = trace_event_raw_init, \
740 .probe = trace_event_raw_event_##call, \
741 .reg = trace_event_reg, \
742 _TRACE_PERF_INIT(call) \
743};
744
745#undef DEFINE_EVENT
746#define DEFINE_EVENT(template, call, proto, args) \
747 \
748static struct trace_event_call __used event_##call = { \
749 .class = &event_class_##template, \
750 { \
751 .tp = &__tracepoint_##call, \
752 }, \
753 .event.funcs = &trace_event_type_funcs_##template, \
754 .print_fmt = print_fmt_##template, \
755 .flags = TRACE_EVENT_FL_TRACEPOINT, \
756}; \
757static struct trace_event_call __used \
758__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
759
760#undef DEFINE_EVENT_PRINT
761#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
762 \
763static char print_fmt_##call[] = print; \
764 \
765static struct trace_event_call __used event_##call = { \
766 .class = &event_class_##template, \
767 { \
768 .tp = &__tracepoint_##call, \
769 }, \
770 .event.funcs = &trace_event_type_funcs_##call, \
771 .print_fmt = print_fmt_##call, \
772 .flags = TRACE_EVENT_FL_TRACEPOINT, \
773}; \
774static struct trace_event_call __used \
775__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
776
777#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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 trace_event_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/trace_events.h>
20
21#ifndef TRACE_SYSTEM_VAR
22#define TRACE_SYSTEM_VAR TRACE_SYSTEM
23#endif
24
25#define __app__(x, y) str__##x##y
26#define __app(x, y) __app__(x, y)
27
28#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
29
30#define TRACE_MAKE_SYSTEM_STR() \
31 static const char TRACE_SYSTEM_STRING[] = \
32 __stringify(TRACE_SYSTEM)
33
34TRACE_MAKE_SYSTEM_STR();
35
36#undef TRACE_DEFINE_ENUM
37#define TRACE_DEFINE_ENUM(a) \
38 static struct trace_enum_map __used __initdata \
39 __##TRACE_SYSTEM##_##a = \
40 { \
41 .system = TRACE_SYSTEM_STRING, \
42 .enum_string = #a, \
43 .enum_value = a \
44 }; \
45 static struct trace_enum_map __used \
46 __attribute__((section("_ftrace_enum_map"))) \
47 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
48
49/*
50 * DECLARE_EVENT_CLASS can be used to add a generic function
51 * handlers for events. That is, if all events have the same
52 * parameters and just have distinct trace points.
53 * Each tracepoint can be defined with DEFINE_EVENT and that
54 * will map the DECLARE_EVENT_CLASS to the tracepoint.
55 *
56 * TRACE_EVENT is a one to one mapping between tracepoint and template.
57 */
58#undef TRACE_EVENT
59#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
60 DECLARE_EVENT_CLASS(name, \
61 PARAMS(proto), \
62 PARAMS(args), \
63 PARAMS(tstruct), \
64 PARAMS(assign), \
65 PARAMS(print)); \
66 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
67
68
69#undef __field
70#define __field(type, item) type item;
71
72#undef __field_ext
73#define __field_ext(type, item, filter_type) type item;
74
75#undef __field_struct
76#define __field_struct(type, item) type item;
77
78#undef __field_struct_ext
79#define __field_struct_ext(type, item, filter_type) type item;
80
81#undef __array
82#define __array(type, item, len) type item[len];
83
84#undef __dynamic_array
85#define __dynamic_array(type, item, len) u32 __data_loc_##item;
86
87#undef __string
88#define __string(item, src) __dynamic_array(char, item, -1)
89
90#undef __bitmask
91#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
92
93#undef TP_STRUCT__entry
94#define TP_STRUCT__entry(args...) args
95
96#undef DECLARE_EVENT_CLASS
97#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
98 struct trace_event_raw_##name { \
99 struct trace_entry ent; \
100 tstruct \
101 char __data[0]; \
102 }; \
103 \
104 static struct trace_event_class event_class_##name;
105
106#undef DEFINE_EVENT
107#define DEFINE_EVENT(template, name, proto, args) \
108 static struct trace_event_call __used \
109 __attribute__((__aligned__(4))) event_##name
110
111#undef DEFINE_EVENT_FN
112#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
113 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
114
115#undef DEFINE_EVENT_PRINT
116#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
117 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
118
119/* Callbacks are meaningless to ftrace. */
120#undef TRACE_EVENT_FN
121#define TRACE_EVENT_FN(name, proto, args, tstruct, \
122 assign, print, reg, unreg) \
123 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
124 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
125
126#undef TRACE_EVENT_FN_COND
127#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
128 assign, print, reg, unreg) \
129 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
130 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
131
132#undef TRACE_EVENT_FLAGS
133#define TRACE_EVENT_FLAGS(name, value) \
134 __TRACE_EVENT_FLAGS(name, value)
135
136#undef TRACE_EVENT_PERF_PERM
137#define TRACE_EVENT_PERF_PERM(name, expr...) \
138 __TRACE_EVENT_PERF_PERM(name, expr)
139
140#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
141
142/*
143 * Stage 2 of the trace events.
144 *
145 * Include the following:
146 *
147 * struct trace_event_data_offsets_<call> {
148 * u32 <item1>;
149 * u32 <item2>;
150 * [...]
151 * };
152 *
153 * The __dynamic_array() macro will create each u32 <item>, this is
154 * to keep the offset of each array from the beginning of the event.
155 * The size of an array is also encoded, in the higher 16 bits of <item>.
156 */
157
158#undef TRACE_DEFINE_ENUM
159#define TRACE_DEFINE_ENUM(a)
160
161#undef __field
162#define __field(type, item)
163
164#undef __field_ext
165#define __field_ext(type, item, filter_type)
166
167#undef __field_struct
168#define __field_struct(type, item)
169
170#undef __field_struct_ext
171#define __field_struct_ext(type, item, filter_type)
172
173#undef __array
174#define __array(type, item, len)
175
176#undef __dynamic_array
177#define __dynamic_array(type, item, len) u32 item;
178
179#undef __string
180#define __string(item, src) __dynamic_array(char, item, -1)
181
182#undef __bitmask
183#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
184
185#undef DECLARE_EVENT_CLASS
186#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
187 struct trace_event_data_offsets_##call { \
188 tstruct; \
189 };
190
191#undef DEFINE_EVENT
192#define DEFINE_EVENT(template, name, proto, args)
193
194#undef DEFINE_EVENT_PRINT
195#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
196 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
197
198#undef TRACE_EVENT_FLAGS
199#define TRACE_EVENT_FLAGS(event, flag)
200
201#undef TRACE_EVENT_PERF_PERM
202#define TRACE_EVENT_PERF_PERM(event, expr...)
203
204#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
205
206/*
207 * Stage 3 of the trace events.
208 *
209 * Override the macros in <trace/trace_events.h> to include the following:
210 *
211 * enum print_line_t
212 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
213 * {
214 * struct trace_seq *s = &iter->seq;
215 * struct trace_event_raw_<call> *field; <-- defined in stage 1
216 * struct trace_entry *entry;
217 * struct trace_seq *p = &iter->tmp_seq;
218 * int ret;
219 *
220 * entry = iter->ent;
221 *
222 * if (entry->type != event_<call>->event.type) {
223 * WARN_ON_ONCE(1);
224 * return TRACE_TYPE_UNHANDLED;
225 * }
226 *
227 * field = (typeof(field))entry;
228 *
229 * trace_seq_init(p);
230 * ret = trace_seq_printf(s, "%s: ", <call>);
231 * if (ret)
232 * ret = trace_seq_printf(s, <TP_printk> "\n");
233 * if (!ret)
234 * return TRACE_TYPE_PARTIAL_LINE;
235 *
236 * return TRACE_TYPE_HANDLED;
237 * }
238 *
239 * This is the method used to print the raw event to the trace
240 * output format. Note, this is not needed if the data is read
241 * in binary.
242 */
243
244#undef __entry
245#define __entry field
246
247#undef TP_printk
248#define TP_printk(fmt, args...) fmt "\n", args
249
250#undef __get_dynamic_array
251#define __get_dynamic_array(field) \
252 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
253
254#undef __get_dynamic_array_len
255#define __get_dynamic_array_len(field) \
256 ((__entry->__data_loc_##field >> 16) & 0xffff)
257
258#undef __get_str
259#define __get_str(field) ((char *)__get_dynamic_array(field))
260
261#undef __get_bitmask
262#define __get_bitmask(field) \
263 ({ \
264 void *__bitmask = __get_dynamic_array(field); \
265 unsigned int __bitmask_size; \
266 __bitmask_size = __get_dynamic_array_len(field); \
267 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
268 })
269
270#undef __print_flags
271#define __print_flags(flag, delim, flag_array...) \
272 ({ \
273 static const struct trace_print_flags __flags[] = \
274 { flag_array, { -1, NULL }}; \
275 trace_print_flags_seq(p, delim, flag, __flags); \
276 })
277
278#undef __print_symbolic
279#define __print_symbolic(value, symbol_array...) \
280 ({ \
281 static const struct trace_print_flags symbols[] = \
282 { symbol_array, { -1, NULL }}; \
283 trace_print_symbols_seq(p, value, symbols); \
284 })
285
286#undef __print_symbolic_u64
287#if BITS_PER_LONG == 32
288#define __print_symbolic_u64(value, symbol_array...) \
289 ({ \
290 static const struct trace_print_flags_u64 symbols[] = \
291 { symbol_array, { -1, NULL } }; \
292 trace_print_symbols_seq_u64(p, value, symbols); \
293 })
294#else
295#define __print_symbolic_u64(value, symbol_array...) \
296 __print_symbolic(value, symbol_array)
297#endif
298
299#undef __print_hex
300#define __print_hex(buf, buf_len) trace_print_hex_seq(p, buf, buf_len)
301
302#undef __print_array
303#define __print_array(array, count, el_size) \
304 ({ \
305 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
306 el_size != 4 && el_size != 8); \
307 trace_print_array_seq(p, array, count, el_size); \
308 })
309
310#undef DECLARE_EVENT_CLASS
311#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
312static notrace enum print_line_t \
313trace_raw_output_##call(struct trace_iterator *iter, int flags, \
314 struct trace_event *trace_event) \
315{ \
316 struct trace_seq *s = &iter->seq; \
317 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
318 struct trace_event_raw_##call *field; \
319 int ret; \
320 \
321 field = (typeof(field))iter->ent; \
322 \
323 ret = trace_raw_output_prep(iter, trace_event); \
324 if (ret != TRACE_TYPE_HANDLED) \
325 return ret; \
326 \
327 trace_seq_printf(s, print); \
328 \
329 return trace_handle_return(s); \
330} \
331static struct trace_event_functions trace_event_type_funcs_##call = { \
332 .trace = trace_raw_output_##call, \
333};
334
335#undef DEFINE_EVENT_PRINT
336#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
337static notrace enum print_line_t \
338trace_raw_output_##call(struct trace_iterator *iter, int flags, \
339 struct trace_event *event) \
340{ \
341 struct trace_event_raw_##template *field; \
342 struct trace_entry *entry; \
343 struct trace_seq *p = &iter->tmp_seq; \
344 \
345 entry = iter->ent; \
346 \
347 if (entry->type != event_##call.event.type) { \
348 WARN_ON_ONCE(1); \
349 return TRACE_TYPE_UNHANDLED; \
350 } \
351 \
352 field = (typeof(field))entry; \
353 \
354 trace_seq_init(p); \
355 return trace_output_call(iter, #call, print); \
356} \
357static struct trace_event_functions trace_event_type_funcs_##call = { \
358 .trace = trace_raw_output_##call, \
359};
360
361#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
362
363#undef __field_ext
364#define __field_ext(type, item, filter_type) \
365 ret = trace_define_field(event_call, #type, #item, \
366 offsetof(typeof(field), item), \
367 sizeof(field.item), \
368 is_signed_type(type), filter_type); \
369 if (ret) \
370 return ret;
371
372#undef __field_struct_ext
373#define __field_struct_ext(type, item, filter_type) \
374 ret = trace_define_field(event_call, #type, #item, \
375 offsetof(typeof(field), item), \
376 sizeof(field.item), \
377 0, filter_type); \
378 if (ret) \
379 return ret;
380
381#undef __field
382#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
383
384#undef __field_struct
385#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
386
387#undef __array
388#define __array(type, item, len) \
389 do { \
390 char *type_str = #type"["__stringify(len)"]"; \
391 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
392 ret = trace_define_field(event_call, type_str, #item, \
393 offsetof(typeof(field), item), \
394 sizeof(field.item), \
395 is_signed_type(type), FILTER_OTHER); \
396 if (ret) \
397 return ret; \
398 } while (0);
399
400#undef __dynamic_array
401#define __dynamic_array(type, item, len) \
402 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
403 offsetof(typeof(field), __data_loc_##item), \
404 sizeof(field.__data_loc_##item), \
405 is_signed_type(type), FILTER_OTHER);
406
407#undef __string
408#define __string(item, src) __dynamic_array(char, item, -1)
409
410#undef __bitmask
411#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
412
413#undef DECLARE_EVENT_CLASS
414#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
415static int notrace __init \
416trace_event_define_fields_##call(struct trace_event_call *event_call) \
417{ \
418 struct trace_event_raw_##call field; \
419 int ret; \
420 \
421 tstruct; \
422 \
423 return ret; \
424}
425
426#undef DEFINE_EVENT
427#define DEFINE_EVENT(template, name, proto, args)
428
429#undef DEFINE_EVENT_PRINT
430#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
431 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
432
433#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
434
435/*
436 * remember the offset of each array from the beginning of the event.
437 */
438
439#undef __entry
440#define __entry entry
441
442#undef __field
443#define __field(type, item)
444
445#undef __field_ext
446#define __field_ext(type, item, filter_type)
447
448#undef __field_struct
449#define __field_struct(type, item)
450
451#undef __field_struct_ext
452#define __field_struct_ext(type, item, filter_type)
453
454#undef __array
455#define __array(type, item, len)
456
457#undef __dynamic_array
458#define __dynamic_array(type, item, len) \
459 __item_length = (len) * sizeof(type); \
460 __data_offsets->item = __data_size + \
461 offsetof(typeof(*entry), __data); \
462 __data_offsets->item |= __item_length << 16; \
463 __data_size += __item_length;
464
465#undef __string
466#define __string(item, src) __dynamic_array(char, item, \
467 strlen((src) ? (const char *)(src) : "(null)") + 1)
468
469/*
470 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
471 * num_possible_cpus().
472 */
473#define __bitmask_size_in_bytes_raw(nr_bits) \
474 (((nr_bits) + 7) / 8)
475
476#define __bitmask_size_in_longs(nr_bits) \
477 ((__bitmask_size_in_bytes_raw(nr_bits) + \
478 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
479
480/*
481 * __bitmask_size_in_bytes is the number of bytes needed to hold
482 * num_possible_cpus() padded out to the nearest long. This is what
483 * is saved in the buffer, just to be consistent.
484 */
485#define __bitmask_size_in_bytes(nr_bits) \
486 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
487
488#undef __bitmask
489#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
490 __bitmask_size_in_longs(nr_bits))
491
492#undef DECLARE_EVENT_CLASS
493#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
494static inline notrace int trace_event_get_offsets_##call( \
495 struct trace_event_data_offsets_##call *__data_offsets, proto) \
496{ \
497 int __data_size = 0; \
498 int __maybe_unused __item_length; \
499 struct trace_event_raw_##call __maybe_unused *entry; \
500 \
501 tstruct; \
502 \
503 return __data_size; \
504}
505
506#undef DEFINE_EVENT
507#define DEFINE_EVENT(template, name, proto, args)
508
509#undef DEFINE_EVENT_PRINT
510#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
511 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
512
513#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
514
515/*
516 * Stage 4 of the trace events.
517 *
518 * Override the macros in <trace/trace_events.h> to include the following:
519 *
520 * For those macros defined with TRACE_EVENT:
521 *
522 * static struct trace_event_call event_<call>;
523 *
524 * static void trace_event_raw_event_<call>(void *__data, proto)
525 * {
526 * struct trace_event_file *trace_file = __data;
527 * struct trace_event_call *event_call = trace_file->event_call;
528 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
529 * unsigned long eflags = trace_file->flags;
530 * enum event_trigger_type __tt = ETT_NONE;
531 * struct ring_buffer_event *event;
532 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
533 * struct ring_buffer *buffer;
534 * unsigned long irq_flags;
535 * int __data_size;
536 * int pc;
537 *
538 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
539 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
540 * event_triggers_call(trace_file, NULL);
541 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
542 * return;
543 * }
544 *
545 * local_save_flags(irq_flags);
546 * pc = preempt_count();
547 *
548 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
549 *
550 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
551 * event_<call>->event.type,
552 * sizeof(*entry) + __data_size,
553 * irq_flags, pc);
554 * if (!event)
555 * return;
556 * entry = ring_buffer_event_data(event);
557 *
558 * { <assign>; } <-- Here we assign the entries by the __field and
559 * __array macros.
560 *
561 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
562 * __tt = event_triggers_call(trace_file, entry);
563 *
564 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
565 * &trace_file->flags))
566 * ring_buffer_discard_commit(buffer, event);
567 * else if (!filter_check_discard(trace_file, entry, buffer, event))
568 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
569 *
570 * if (__tt)
571 * event_triggers_post_call(trace_file, __tt);
572 * }
573 *
574 * static struct trace_event ftrace_event_type_<call> = {
575 * .trace = trace_raw_output_<call>, <-- stage 2
576 * };
577 *
578 * static char print_fmt_<call>[] = <TP_printk>;
579 *
580 * static struct trace_event_class __used event_class_<template> = {
581 * .system = "<system>",
582 * .define_fields = trace_event_define_fields_<call>,
583 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
584 * .raw_init = trace_event_raw_init,
585 * .probe = trace_event_raw_event_##call,
586 * .reg = trace_event_reg,
587 * };
588 *
589 * static struct trace_event_call event_<call> = {
590 * .class = event_class_<template>,
591 * {
592 * .tp = &__tracepoint_<call>,
593 * },
594 * .event = &ftrace_event_type_<call>,
595 * .print_fmt = print_fmt_<call>,
596 * .flags = TRACE_EVENT_FL_TRACEPOINT,
597 * };
598 * // its only safe to use pointers when doing linker tricks to
599 * // create an array.
600 * static struct trace_event_call __used
601 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
602 *
603 */
604
605#ifdef CONFIG_PERF_EVENTS
606
607#define _TRACE_PERF_PROTO(call, proto) \
608 static notrace void \
609 perf_trace_##call(void *__data, proto);
610
611#define _TRACE_PERF_INIT(call) \
612 .perf_probe = perf_trace_##call,
613
614#else
615#define _TRACE_PERF_PROTO(call, proto)
616#define _TRACE_PERF_INIT(call)
617#endif /* CONFIG_PERF_EVENTS */
618
619#undef __entry
620#define __entry entry
621
622#undef __field
623#define __field(type, item)
624
625#undef __field_struct
626#define __field_struct(type, item)
627
628#undef __array
629#define __array(type, item, len)
630
631#undef __dynamic_array
632#define __dynamic_array(type, item, len) \
633 __entry->__data_loc_##item = __data_offsets.item;
634
635#undef __string
636#define __string(item, src) __dynamic_array(char, item, -1)
637
638#undef __assign_str
639#define __assign_str(dst, src) \
640 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
641
642#undef __bitmask
643#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
644
645#undef __get_bitmask
646#define __get_bitmask(field) (char *)__get_dynamic_array(field)
647
648#undef __assign_bitmask
649#define __assign_bitmask(dst, src, nr_bits) \
650 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
651
652#undef TP_fast_assign
653#define TP_fast_assign(args...) args
654
655#undef __perf_count
656#define __perf_count(c) (c)
657
658#undef __perf_task
659#define __perf_task(t) (t)
660
661#undef DECLARE_EVENT_CLASS
662#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
663 \
664static notrace void \
665trace_event_raw_event_##call(void *__data, proto) \
666{ \
667 struct trace_event_file *trace_file = __data; \
668 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
669 struct trace_event_buffer fbuffer; \
670 struct trace_event_raw_##call *entry; \
671 int __data_size; \
672 \
673 if (trace_trigger_soft_disabled(trace_file)) \
674 return; \
675 \
676 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
677 \
678 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
679 sizeof(*entry) + __data_size); \
680 \
681 if (!entry) \
682 return; \
683 \
684 tstruct \
685 \
686 { assign; } \
687 \
688 trace_event_buffer_commit(&fbuffer); \
689}
690/*
691 * The ftrace_test_probe is compiled out, it is only here as a build time check
692 * to make sure that if the tracepoint handling changes, the ftrace probe will
693 * fail to compile unless it too is updated.
694 */
695
696#undef DEFINE_EVENT
697#define DEFINE_EVENT(template, call, proto, args) \
698static inline void ftrace_test_probe_##call(void) \
699{ \
700 check_trace_callback_type_##call(trace_event_raw_event_##template); \
701}
702
703#undef DEFINE_EVENT_PRINT
704#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
705
706#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
707
708#undef __entry
709#define __entry REC
710
711#undef __print_flags
712#undef __print_symbolic
713#undef __print_hex
714#undef __get_dynamic_array
715#undef __get_dynamic_array_len
716#undef __get_str
717#undef __get_bitmask
718#undef __print_array
719
720#undef TP_printk
721#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
722
723#undef DECLARE_EVENT_CLASS
724#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
725_TRACE_PERF_PROTO(call, PARAMS(proto)); \
726static char print_fmt_##call[] = print; \
727static struct trace_event_class __used __refdata event_class_##call = { \
728 .system = TRACE_SYSTEM_STRING, \
729 .define_fields = trace_event_define_fields_##call, \
730 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
731 .raw_init = trace_event_raw_init, \
732 .probe = trace_event_raw_event_##call, \
733 .reg = trace_event_reg, \
734 _TRACE_PERF_INIT(call) \
735};
736
737#undef DEFINE_EVENT
738#define DEFINE_EVENT(template, call, proto, args) \
739 \
740static struct trace_event_call __used event_##call = { \
741 .class = &event_class_##template, \
742 { \
743 .tp = &__tracepoint_##call, \
744 }, \
745 .event.funcs = &trace_event_type_funcs_##template, \
746 .print_fmt = print_fmt_##template, \
747 .flags = TRACE_EVENT_FL_TRACEPOINT, \
748}; \
749static struct trace_event_call __used \
750__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
751
752#undef DEFINE_EVENT_PRINT
753#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
754 \
755static char print_fmt_##call[] = print; \
756 \
757static struct trace_event_call __used event_##call = { \
758 .class = &event_class_##template, \
759 { \
760 .tp = &__tracepoint_##call, \
761 }, \
762 .event.funcs = &trace_event_type_funcs_##call, \
763 .print_fmt = print_fmt_##call, \
764 .flags = TRACE_EVENT_FL_TRACEPOINT, \
765}; \
766static struct trace_event_call __used \
767__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
768
769#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)