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Merge tag 'media/v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / include / trace / ftrace.h
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 #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
34 TRACE_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 ftrace_raw_##name { \
99 struct trace_entry ent; \
100 tstruct \
101 char __data[0]; \
102 }; \
103 \
104 static struct ftrace_event_class event_class_##name;
105
106 #undef DEFINE_EVENT
107 #define DEFINE_EVENT(template, name, proto, args) \
108 static struct ftrace_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_FLAGS
127 #define TRACE_EVENT_FLAGS(name, value) \
128 __TRACE_EVENT_FLAGS(name, value)
129
130 #undef TRACE_EVENT_PERF_PERM
131 #define TRACE_EVENT_PERF_PERM(name, expr...) \
132 __TRACE_EVENT_PERF_PERM(name, expr)
133
134 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
135
136 /*
137 * Stage 2 of the trace events.
138 *
139 * Include the following:
140 *
141 * struct ftrace_data_offsets_<call> {
142 * u32 <item1>;
143 * u32 <item2>;
144 * [...]
145 * };
146 *
147 * The __dynamic_array() macro will create each u32 <item>, this is
148 * to keep the offset of each array from the beginning of the event.
149 * The size of an array is also encoded, in the higher 16 bits of <item>.
150 */
151
152 #undef TRACE_DEFINE_ENUM
153 #define TRACE_DEFINE_ENUM(a)
154
155 #undef __field
156 #define __field(type, item)
157
158 #undef __field_ext
159 #define __field_ext(type, item, filter_type)
160
161 #undef __field_struct
162 #define __field_struct(type, item)
163
164 #undef __field_struct_ext
165 #define __field_struct_ext(type, item, filter_type)
166
167 #undef __array
168 #define __array(type, item, len)
169
170 #undef __dynamic_array
171 #define __dynamic_array(type, item, len) u32 item;
172
173 #undef __string
174 #define __string(item, src) __dynamic_array(char, item, -1)
175
176 #undef __bitmask
177 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
178
179 #undef DECLARE_EVENT_CLASS
180 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
181 struct ftrace_data_offsets_##call { \
182 tstruct; \
183 };
184
185 #undef DEFINE_EVENT
186 #define DEFINE_EVENT(template, name, proto, args)
187
188 #undef DEFINE_EVENT_PRINT
189 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
190 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
191
192 #undef TRACE_EVENT_FLAGS
193 #define TRACE_EVENT_FLAGS(event, flag)
194
195 #undef TRACE_EVENT_PERF_PERM
196 #define TRACE_EVENT_PERF_PERM(event, expr...)
197
198 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
199
200 /*
201 * Stage 3 of the trace events.
202 *
203 * Override the macros in <trace/trace_events.h> to include the following:
204 *
205 * enum print_line_t
206 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
207 * {
208 * struct trace_seq *s = &iter->seq;
209 * struct ftrace_raw_<call> *field; <-- defined in stage 1
210 * struct trace_entry *entry;
211 * struct trace_seq *p = &iter->tmp_seq;
212 * int ret;
213 *
214 * entry = iter->ent;
215 *
216 * if (entry->type != event_<call>->event.type) {
217 * WARN_ON_ONCE(1);
218 * return TRACE_TYPE_UNHANDLED;
219 * }
220 *
221 * field = (typeof(field))entry;
222 *
223 * trace_seq_init(p);
224 * ret = trace_seq_printf(s, "%s: ", <call>);
225 * if (ret)
226 * ret = trace_seq_printf(s, <TP_printk> "\n");
227 * if (!ret)
228 * return TRACE_TYPE_PARTIAL_LINE;
229 *
230 * return TRACE_TYPE_HANDLED;
231 * }
232 *
233 * This is the method used to print the raw event to the trace
234 * output format. Note, this is not needed if the data is read
235 * in binary.
236 */
237
238 #undef __entry
239 #define __entry field
240
241 #undef TP_printk
242 #define TP_printk(fmt, args...) fmt "\n", args
243
244 #undef __get_dynamic_array
245 #define __get_dynamic_array(field) \
246 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
247
248 #undef __get_dynamic_array_len
249 #define __get_dynamic_array_len(field) \
250 ((__entry->__data_loc_##field >> 16) & 0xffff)
251
252 #undef __get_str
253 #define __get_str(field) (char *)__get_dynamic_array(field)
254
255 #undef __get_bitmask
256 #define __get_bitmask(field) \
257 ({ \
258 void *__bitmask = __get_dynamic_array(field); \
259 unsigned int __bitmask_size; \
260 __bitmask_size = __get_dynamic_array_len(field); \
261 ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
262 })
263
264 #undef __print_flags
265 #define __print_flags(flag, delim, flag_array...) \
266 ({ \
267 static const struct trace_print_flags __flags[] = \
268 { flag_array, { -1, NULL }}; \
269 ftrace_print_flags_seq(p, delim, flag, __flags); \
270 })
271
272 #undef __print_symbolic
273 #define __print_symbolic(value, symbol_array...) \
274 ({ \
275 static const struct trace_print_flags symbols[] = \
276 { symbol_array, { -1, NULL }}; \
277 ftrace_print_symbols_seq(p, value, symbols); \
278 })
279
280 #undef __print_symbolic_u64
281 #if BITS_PER_LONG == 32
282 #define __print_symbolic_u64(value, symbol_array...) \
283 ({ \
284 static const struct trace_print_flags_u64 symbols[] = \
285 { symbol_array, { -1, NULL } }; \
286 ftrace_print_symbols_seq_u64(p, value, symbols); \
287 })
288 #else
289 #define __print_symbolic_u64(value, symbol_array...) \
290 __print_symbolic(value, symbol_array)
291 #endif
292
293 #undef __print_hex
294 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
295
296 #undef __print_array
297 #define __print_array(array, count, el_size) \
298 ({ \
299 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
300 el_size != 4 && el_size != 8); \
301 ftrace_print_array_seq(p, array, count, el_size); \
302 })
303
304 #undef DECLARE_EVENT_CLASS
305 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
306 static notrace enum print_line_t \
307 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
308 struct trace_event *trace_event) \
309 { \
310 struct trace_seq *s = &iter->seq; \
311 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
312 struct ftrace_raw_##call *field; \
313 int ret; \
314 \
315 field = (typeof(field))iter->ent; \
316 \
317 ret = ftrace_raw_output_prep(iter, trace_event); \
318 if (ret != TRACE_TYPE_HANDLED) \
319 return ret; \
320 \
321 trace_seq_printf(s, print); \
322 \
323 return trace_handle_return(s); \
324 } \
325 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
326 .trace = ftrace_raw_output_##call, \
327 };
328
329 #undef DEFINE_EVENT_PRINT
330 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
331 static notrace enum print_line_t \
332 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
333 struct trace_event *event) \
334 { \
335 struct ftrace_raw_##template *field; \
336 struct trace_entry *entry; \
337 struct trace_seq *p = &iter->tmp_seq; \
338 \
339 entry = iter->ent; \
340 \
341 if (entry->type != event_##call.event.type) { \
342 WARN_ON_ONCE(1); \
343 return TRACE_TYPE_UNHANDLED; \
344 } \
345 \
346 field = (typeof(field))entry; \
347 \
348 trace_seq_init(p); \
349 return ftrace_output_call(iter, #call, print); \
350 } \
351 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
352 .trace = ftrace_raw_output_##call, \
353 };
354
355 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
356
357 #undef __field_ext
358 #define __field_ext(type, item, filter_type) \
359 ret = trace_define_field(event_call, #type, #item, \
360 offsetof(typeof(field), item), \
361 sizeof(field.item), \
362 is_signed_type(type), filter_type); \
363 if (ret) \
364 return ret;
365
366 #undef __field_struct_ext
367 #define __field_struct_ext(type, item, filter_type) \
368 ret = trace_define_field(event_call, #type, #item, \
369 offsetof(typeof(field), item), \
370 sizeof(field.item), \
371 0, filter_type); \
372 if (ret) \
373 return ret;
374
375 #undef __field
376 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
377
378 #undef __field_struct
379 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
380
381 #undef __array
382 #define __array(type, item, len) \
383 do { \
384 char *type_str = #type"["__stringify(len)"]"; \
385 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
386 ret = trace_define_field(event_call, type_str, #item, \
387 offsetof(typeof(field), item), \
388 sizeof(field.item), \
389 is_signed_type(type), FILTER_OTHER); \
390 if (ret) \
391 return ret; \
392 } while (0);
393
394 #undef __dynamic_array
395 #define __dynamic_array(type, item, len) \
396 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
397 offsetof(typeof(field), __data_loc_##item), \
398 sizeof(field.__data_loc_##item), \
399 is_signed_type(type), FILTER_OTHER);
400
401 #undef __string
402 #define __string(item, src) __dynamic_array(char, item, -1)
403
404 #undef __bitmask
405 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
406
407 #undef DECLARE_EVENT_CLASS
408 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
409 static int notrace __init \
410 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
411 { \
412 struct ftrace_raw_##call field; \
413 int ret; \
414 \
415 tstruct; \
416 \
417 return ret; \
418 }
419
420 #undef DEFINE_EVENT
421 #define DEFINE_EVENT(template, name, proto, args)
422
423 #undef DEFINE_EVENT_PRINT
424 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
425 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
426
427 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
428
429 /*
430 * remember the offset of each array from the beginning of the event.
431 */
432
433 #undef __entry
434 #define __entry entry
435
436 #undef __field
437 #define __field(type, item)
438
439 #undef __field_ext
440 #define __field_ext(type, item, filter_type)
441
442 #undef __field_struct
443 #define __field_struct(type, item)
444
445 #undef __field_struct_ext
446 #define __field_struct_ext(type, item, filter_type)
447
448 #undef __array
449 #define __array(type, item, len)
450
451 #undef __dynamic_array
452 #define __dynamic_array(type, item, len) \
453 __item_length = (len) * sizeof(type); \
454 __data_offsets->item = __data_size + \
455 offsetof(typeof(*entry), __data); \
456 __data_offsets->item |= __item_length << 16; \
457 __data_size += __item_length;
458
459 #undef __string
460 #define __string(item, src) __dynamic_array(char, item, \
461 strlen((src) ? (const char *)(src) : "(null)") + 1)
462
463 /*
464 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
465 * num_possible_cpus().
466 */
467 #define __bitmask_size_in_bytes_raw(nr_bits) \
468 (((nr_bits) + 7) / 8)
469
470 #define __bitmask_size_in_longs(nr_bits) \
471 ((__bitmask_size_in_bytes_raw(nr_bits) + \
472 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
473
474 /*
475 * __bitmask_size_in_bytes is the number of bytes needed to hold
476 * num_possible_cpus() padded out to the nearest long. This is what
477 * is saved in the buffer, just to be consistent.
478 */
479 #define __bitmask_size_in_bytes(nr_bits) \
480 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
481
482 #undef __bitmask
483 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
484 __bitmask_size_in_longs(nr_bits))
485
486 #undef DECLARE_EVENT_CLASS
487 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
488 static inline notrace int ftrace_get_offsets_##call( \
489 struct ftrace_data_offsets_##call *__data_offsets, proto) \
490 { \
491 int __data_size = 0; \
492 int __maybe_unused __item_length; \
493 struct ftrace_raw_##call __maybe_unused *entry; \
494 \
495 tstruct; \
496 \
497 return __data_size; \
498 }
499
500 #undef DEFINE_EVENT
501 #define DEFINE_EVENT(template, name, proto, args)
502
503 #undef DEFINE_EVENT_PRINT
504 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
505 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
506
507 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
508
509 /*
510 * Stage 4 of the trace events.
511 *
512 * Override the macros in <trace/trace_events.h> to include the following:
513 *
514 * For those macros defined with TRACE_EVENT:
515 *
516 * static struct ftrace_event_call event_<call>;
517 *
518 * static void ftrace_raw_event_<call>(void *__data, proto)
519 * {
520 * struct ftrace_event_file *ftrace_file = __data;
521 * struct ftrace_event_call *event_call = ftrace_file->event_call;
522 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
523 * unsigned long eflags = ftrace_file->flags;
524 * enum event_trigger_type __tt = ETT_NONE;
525 * struct ring_buffer_event *event;
526 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
527 * struct ring_buffer *buffer;
528 * unsigned long irq_flags;
529 * int __data_size;
530 * int pc;
531 *
532 * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
533 * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
534 * event_triggers_call(ftrace_file, NULL);
535 * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
536 * return;
537 * }
538 *
539 * local_save_flags(irq_flags);
540 * pc = preempt_count();
541 *
542 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
543 *
544 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
545 * event_<call>->event.type,
546 * sizeof(*entry) + __data_size,
547 * irq_flags, pc);
548 * if (!event)
549 * return;
550 * entry = ring_buffer_event_data(event);
551 *
552 * { <assign>; } <-- Here we assign the entries by the __field and
553 * __array macros.
554 *
555 * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
556 * __tt = event_triggers_call(ftrace_file, entry);
557 *
558 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
559 * &ftrace_file->flags))
560 * ring_buffer_discard_commit(buffer, event);
561 * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
562 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
563 *
564 * if (__tt)
565 * event_triggers_post_call(ftrace_file, __tt);
566 * }
567 *
568 * static struct trace_event ftrace_event_type_<call> = {
569 * .trace = ftrace_raw_output_<call>, <-- stage 2
570 * };
571 *
572 * static char print_fmt_<call>[] = <TP_printk>;
573 *
574 * static struct ftrace_event_class __used event_class_<template> = {
575 * .system = "<system>",
576 * .define_fields = ftrace_define_fields_<call>,
577 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
578 * .raw_init = trace_event_raw_init,
579 * .probe = ftrace_raw_event_##call,
580 * .reg = ftrace_event_reg,
581 * };
582 *
583 * static struct ftrace_event_call event_<call> = {
584 * .class = event_class_<template>,
585 * {
586 * .tp = &__tracepoint_<call>,
587 * },
588 * .event = &ftrace_event_type_<call>,
589 * .print_fmt = print_fmt_<call>,
590 * .flags = TRACE_EVENT_FL_TRACEPOINT,
591 * };
592 * // its only safe to use pointers when doing linker tricks to
593 * // create an array.
594 * static struct ftrace_event_call __used
595 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
596 *
597 */
598
599 #ifdef CONFIG_PERF_EVENTS
600
601 #define _TRACE_PERF_PROTO(call, proto) \
602 static notrace void \
603 perf_trace_##call(void *__data, proto);
604
605 #define _TRACE_PERF_INIT(call) \
606 .perf_probe = perf_trace_##call,
607
608 #else
609 #define _TRACE_PERF_PROTO(call, proto)
610 #define _TRACE_PERF_INIT(call)
611 #endif /* CONFIG_PERF_EVENTS */
612
613 #undef __entry
614 #define __entry entry
615
616 #undef __field
617 #define __field(type, item)
618
619 #undef __field_struct
620 #define __field_struct(type, item)
621
622 #undef __array
623 #define __array(type, item, len)
624
625 #undef __dynamic_array
626 #define __dynamic_array(type, item, len) \
627 __entry->__data_loc_##item = __data_offsets.item;
628
629 #undef __string
630 #define __string(item, src) __dynamic_array(char, item, -1)
631
632 #undef __assign_str
633 #define __assign_str(dst, src) \
634 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
635
636 #undef __bitmask
637 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
638
639 #undef __get_bitmask
640 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
641
642 #undef __assign_bitmask
643 #define __assign_bitmask(dst, src, nr_bits) \
644 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
645
646 #undef TP_fast_assign
647 #define TP_fast_assign(args...) args
648
649 #undef __perf_addr
650 #define __perf_addr(a) (a)
651
652 #undef __perf_count
653 #define __perf_count(c) (c)
654
655 #undef __perf_task
656 #define __perf_task(t) (t)
657
658 #undef DECLARE_EVENT_CLASS
659 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
660 \
661 static notrace void \
662 ftrace_raw_event_##call(void *__data, proto) \
663 { \
664 struct ftrace_event_file *ftrace_file = __data; \
665 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
666 struct ftrace_event_buffer fbuffer; \
667 struct ftrace_raw_##call *entry; \
668 int __data_size; \
669 \
670 if (ftrace_trigger_soft_disabled(ftrace_file)) \
671 return; \
672 \
673 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
674 \
675 entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
676 sizeof(*entry) + __data_size); \
677 \
678 if (!entry) \
679 return; \
680 \
681 tstruct \
682 \
683 { assign; } \
684 \
685 ftrace_event_buffer_commit(&fbuffer); \
686 }
687 /*
688 * The ftrace_test_probe is compiled out, it is only here as a build time check
689 * to make sure that if the tracepoint handling changes, the ftrace probe will
690 * fail to compile unless it too is updated.
691 */
692
693 #undef DEFINE_EVENT
694 #define DEFINE_EVENT(template, call, proto, args) \
695 static inline void ftrace_test_probe_##call(void) \
696 { \
697 check_trace_callback_type_##call(ftrace_raw_event_##template); \
698 }
699
700 #undef DEFINE_EVENT_PRINT
701 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
702
703 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
704
705 #undef __entry
706 #define __entry REC
707
708 #undef __print_flags
709 #undef __print_symbolic
710 #undef __print_hex
711 #undef __get_dynamic_array
712 #undef __get_dynamic_array_len
713 #undef __get_str
714 #undef __get_bitmask
715 #undef __print_array
716
717 #undef TP_printk
718 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
719
720 #undef DECLARE_EVENT_CLASS
721 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
722 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
723 static char print_fmt_##call[] = print; \
724 static struct ftrace_event_class __used __refdata event_class_##call = { \
725 .system = TRACE_SYSTEM_STRING, \
726 .define_fields = ftrace_define_fields_##call, \
727 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
728 .raw_init = trace_event_raw_init, \
729 .probe = ftrace_raw_event_##call, \
730 .reg = ftrace_event_reg, \
731 _TRACE_PERF_INIT(call) \
732 };
733
734 #undef DEFINE_EVENT
735 #define DEFINE_EVENT(template, call, proto, args) \
736 \
737 static struct ftrace_event_call __used event_##call = { \
738 .class = &event_class_##template, \
739 { \
740 .tp = &__tracepoint_##call, \
741 }, \
742 .event.funcs = &ftrace_event_type_funcs_##template, \
743 .print_fmt = print_fmt_##template, \
744 .flags = TRACE_EVENT_FL_TRACEPOINT, \
745 }; \
746 static struct ftrace_event_call __used \
747 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
748
749 #undef DEFINE_EVENT_PRINT
750 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
751 \
752 static char print_fmt_##call[] = print; \
753 \
754 static struct ftrace_event_call __used event_##call = { \
755 .class = &event_class_##template, \
756 { \
757 .tp = &__tracepoint_##call, \
758 }, \
759 .event.funcs = &ftrace_event_type_funcs_##call, \
760 .print_fmt = print_fmt_##call, \
761 .flags = TRACE_EVENT_FL_TRACEPOINT, \
762 }; \
763 static struct ftrace_event_call __used \
764 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
765
766 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
767
768 #undef TRACE_SYSTEM_VAR
769
770 #ifdef CONFIG_PERF_EVENTS
771
772 #undef __entry
773 #define __entry entry
774
775 #undef __get_dynamic_array
776 #define __get_dynamic_array(field) \
777 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
778
779 #undef __get_dynamic_array_len
780 #define __get_dynamic_array_len(field) \
781 ((__entry->__data_loc_##field >> 16) & 0xffff)
782
783 #undef __get_str
784 #define __get_str(field) (char *)__get_dynamic_array(field)
785
786 #undef __get_bitmask
787 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
788
789 #undef __perf_addr
790 #define __perf_addr(a) (__addr = (a))
791
792 #undef __perf_count
793 #define __perf_count(c) (__count = (c))
794
795 #undef __perf_task
796 #define __perf_task(t) (__task = (t))
797
798 #undef DECLARE_EVENT_CLASS
799 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
800 static notrace void \
801 perf_trace_##call(void *__data, proto) \
802 { \
803 struct ftrace_event_call *event_call = __data; \
804 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
805 struct ftrace_raw_##call *entry; \
806 struct pt_regs *__regs; \
807 u64 __addr = 0, __count = 1; \
808 struct task_struct *__task = NULL; \
809 struct hlist_head *head; \
810 int __entry_size; \
811 int __data_size; \
812 int rctx; \
813 \
814 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
815 \
816 head = this_cpu_ptr(event_call->perf_events); \
817 if (__builtin_constant_p(!__task) && !__task && \
818 hlist_empty(head)) \
819 return; \
820 \
821 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
822 sizeof(u64)); \
823 __entry_size -= sizeof(u32); \
824 \
825 entry = perf_trace_buf_prepare(__entry_size, \
826 event_call->event.type, &__regs, &rctx); \
827 if (!entry) \
828 return; \
829 \
830 perf_fetch_caller_regs(__regs); \
831 \
832 tstruct \
833 \
834 { assign; } \
835 \
836 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
837 __count, __regs, head, __task); \
838 }
839
840 /*
841 * This part is compiled out, it is only here as a build time check
842 * to make sure that if the tracepoint handling changes, the
843 * perf probe will fail to compile unless it too is updated.
844 */
845 #undef DEFINE_EVENT
846 #define DEFINE_EVENT(template, call, proto, args) \
847 static inline void perf_test_probe_##call(void) \
848 { \
849 check_trace_callback_type_##call(perf_trace_##template); \
850 }
851
852
853 #undef DEFINE_EVENT_PRINT
854 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
855 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
856
857 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
858 #endif /* CONFIG_PERF_EVENTS */
859
Linux kernel - Deliverables
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