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Merge tag 'pm+acpi-3.20-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafae...
[mirror_ubuntu-bionic-kernel.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 /*
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 __field_struct
48 #define __field_struct(type, item) type item;
49
50 #undef __field_struct_ext
51 #define __field_struct_ext(type, item, filter_type) type item;
52
53 #undef __array
54 #define __array(type, item, len) type item[len];
55
56 #undef __dynamic_array
57 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
58
59 #undef __string
60 #define __string(item, src) __dynamic_array(char, item, -1)
61
62 #undef __bitmask
63 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
64
65 #undef TP_STRUCT__entry
66 #define TP_STRUCT__entry(args...) args
67
68 #undef DECLARE_EVENT_CLASS
69 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
70 struct ftrace_raw_##name { \
71 struct trace_entry ent; \
72 tstruct \
73 char __data[0]; \
74 }; \
75 \
76 static struct ftrace_event_class event_class_##name;
77
78 #undef DEFINE_EVENT
79 #define DEFINE_EVENT(template, name, proto, args) \
80 static struct ftrace_event_call __used \
81 __attribute__((__aligned__(4))) event_##name
82
83 #undef DEFINE_EVENT_FN
84 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
85 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
86
87 #undef DEFINE_EVENT_PRINT
88 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
89 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
90
91 /* Callbacks are meaningless to ftrace. */
92 #undef TRACE_EVENT_FN
93 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
94 assign, print, reg, unreg) \
95 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
96 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
97
98 #undef TRACE_EVENT_FLAGS
99 #define TRACE_EVENT_FLAGS(name, value) \
100 __TRACE_EVENT_FLAGS(name, value)
101
102 #undef TRACE_EVENT_PERF_PERM
103 #define TRACE_EVENT_PERF_PERM(name, expr...) \
104 __TRACE_EVENT_PERF_PERM(name, expr)
105
106 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
107
108
109 /*
110 * Stage 2 of the trace events.
111 *
112 * Include the following:
113 *
114 * struct ftrace_data_offsets_<call> {
115 * u32 <item1>;
116 * u32 <item2>;
117 * [...]
118 * };
119 *
120 * The __dynamic_array() macro will create each u32 <item>, this is
121 * to keep the offset of each array from the beginning of the event.
122 * The size of an array is also encoded, in the higher 16 bits of <item>.
123 */
124
125 #undef __field
126 #define __field(type, item)
127
128 #undef __field_ext
129 #define __field_ext(type, item, filter_type)
130
131 #undef __field_struct
132 #define __field_struct(type, item)
133
134 #undef __field_struct_ext
135 #define __field_struct_ext(type, item, filter_type)
136
137 #undef __array
138 #define __array(type, item, len)
139
140 #undef __dynamic_array
141 #define __dynamic_array(type, item, len) u32 item;
142
143 #undef __string
144 #define __string(item, src) __dynamic_array(char, item, -1)
145
146 #undef __bitmask
147 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
148
149 #undef DECLARE_EVENT_CLASS
150 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
151 struct ftrace_data_offsets_##call { \
152 tstruct; \
153 };
154
155 #undef DEFINE_EVENT
156 #define DEFINE_EVENT(template, name, proto, args)
157
158 #undef DEFINE_EVENT_PRINT
159 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
160 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
161
162 #undef TRACE_EVENT_FLAGS
163 #define TRACE_EVENT_FLAGS(event, flag)
164
165 #undef TRACE_EVENT_PERF_PERM
166 #define TRACE_EVENT_PERF_PERM(event, expr...)
167
168 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
169
170 /*
171 * Stage 3 of the trace events.
172 *
173 * Override the macros in <trace/trace_events.h> to include the following:
174 *
175 * enum print_line_t
176 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
177 * {
178 * struct trace_seq *s = &iter->seq;
179 * struct ftrace_raw_<call> *field; <-- defined in stage 1
180 * struct trace_entry *entry;
181 * struct trace_seq *p = &iter->tmp_seq;
182 * int ret;
183 *
184 * entry = iter->ent;
185 *
186 * if (entry->type != event_<call>->event.type) {
187 * WARN_ON_ONCE(1);
188 * return TRACE_TYPE_UNHANDLED;
189 * }
190 *
191 * field = (typeof(field))entry;
192 *
193 * trace_seq_init(p);
194 * ret = trace_seq_printf(s, "%s: ", <call>);
195 * if (ret)
196 * ret = trace_seq_printf(s, <TP_printk> "\n");
197 * if (!ret)
198 * return TRACE_TYPE_PARTIAL_LINE;
199 *
200 * return TRACE_TYPE_HANDLED;
201 * }
202 *
203 * This is the method used to print the raw event to the trace
204 * output format. Note, this is not needed if the data is read
205 * in binary.
206 */
207
208 #undef __entry
209 #define __entry field
210
211 #undef TP_printk
212 #define TP_printk(fmt, args...) fmt "\n", args
213
214 #undef __get_dynamic_array
215 #define __get_dynamic_array(field) \
216 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
217
218 #undef __get_dynamic_array_len
219 #define __get_dynamic_array_len(field) \
220 ((__entry->__data_loc_##field >> 16) & 0xffff)
221
222 #undef __get_str
223 #define __get_str(field) (char *)__get_dynamic_array(field)
224
225 #undef __get_bitmask
226 #define __get_bitmask(field) \
227 ({ \
228 void *__bitmask = __get_dynamic_array(field); \
229 unsigned int __bitmask_size; \
230 __bitmask_size = __get_dynamic_array_len(field); \
231 ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
232 })
233
234 #undef __print_flags
235 #define __print_flags(flag, delim, flag_array...) \
236 ({ \
237 static const struct trace_print_flags __flags[] = \
238 { flag_array, { -1, NULL }}; \
239 ftrace_print_flags_seq(p, delim, flag, __flags); \
240 })
241
242 #undef __print_symbolic
243 #define __print_symbolic(value, symbol_array...) \
244 ({ \
245 static const struct trace_print_flags symbols[] = \
246 { symbol_array, { -1, NULL }}; \
247 ftrace_print_symbols_seq(p, value, symbols); \
248 })
249
250 #undef __print_symbolic_u64
251 #if BITS_PER_LONG == 32
252 #define __print_symbolic_u64(value, symbol_array...) \
253 ({ \
254 static const struct trace_print_flags_u64 symbols[] = \
255 { symbol_array, { -1, NULL } }; \
256 ftrace_print_symbols_seq_u64(p, value, symbols); \
257 })
258 #else
259 #define __print_symbolic_u64(value, symbol_array...) \
260 __print_symbolic(value, symbol_array)
261 #endif
262
263 #undef __print_hex
264 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
265
266 #undef __print_array
267 #define __print_array(array, count, el_size) \
268 ({ \
269 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
270 el_size != 4 && el_size != 8); \
271 ftrace_print_array_seq(p, array, count, el_size); \
272 })
273
274 #undef DECLARE_EVENT_CLASS
275 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
276 static notrace enum print_line_t \
277 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
278 struct trace_event *trace_event) \
279 { \
280 struct trace_seq *s = &iter->seq; \
281 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
282 struct ftrace_raw_##call *field; \
283 int ret; \
284 \
285 field = (typeof(field))iter->ent; \
286 \
287 ret = ftrace_raw_output_prep(iter, trace_event); \
288 if (ret != TRACE_TYPE_HANDLED) \
289 return ret; \
290 \
291 trace_seq_printf(s, print); \
292 \
293 return trace_handle_return(s); \
294 } \
295 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
296 .trace = ftrace_raw_output_##call, \
297 };
298
299 #undef DEFINE_EVENT_PRINT
300 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
301 static notrace enum print_line_t \
302 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
303 struct trace_event *event) \
304 { \
305 struct ftrace_raw_##template *field; \
306 struct trace_entry *entry; \
307 struct trace_seq *p = &iter->tmp_seq; \
308 \
309 entry = iter->ent; \
310 \
311 if (entry->type != event_##call.event.type) { \
312 WARN_ON_ONCE(1); \
313 return TRACE_TYPE_UNHANDLED; \
314 } \
315 \
316 field = (typeof(field))entry; \
317 \
318 trace_seq_init(p); \
319 return ftrace_output_call(iter, #call, print); \
320 } \
321 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
322 .trace = ftrace_raw_output_##call, \
323 };
324
325 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
326
327 #undef __field_ext
328 #define __field_ext(type, item, filter_type) \
329 ret = trace_define_field(event_call, #type, #item, \
330 offsetof(typeof(field), item), \
331 sizeof(field.item), \
332 is_signed_type(type), filter_type); \
333 if (ret) \
334 return ret;
335
336 #undef __field_struct_ext
337 #define __field_struct_ext(type, item, filter_type) \
338 ret = trace_define_field(event_call, #type, #item, \
339 offsetof(typeof(field), item), \
340 sizeof(field.item), \
341 0, filter_type); \
342 if (ret) \
343 return ret;
344
345 #undef __field
346 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
347
348 #undef __field_struct
349 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
350
351 #undef __array
352 #define __array(type, item, len) \
353 do { \
354 char *type_str = #type"["__stringify(len)"]"; \
355 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
356 ret = trace_define_field(event_call, type_str, #item, \
357 offsetof(typeof(field), item), \
358 sizeof(field.item), \
359 is_signed_type(type), FILTER_OTHER); \
360 if (ret) \
361 return ret; \
362 } while (0);
363
364 #undef __dynamic_array
365 #define __dynamic_array(type, item, len) \
366 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
367 offsetof(typeof(field), __data_loc_##item), \
368 sizeof(field.__data_loc_##item), \
369 is_signed_type(type), FILTER_OTHER);
370
371 #undef __string
372 #define __string(item, src) __dynamic_array(char, item, -1)
373
374 #undef __bitmask
375 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
376
377 #undef DECLARE_EVENT_CLASS
378 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
379 static int notrace __init \
380 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
381 { \
382 struct ftrace_raw_##call field; \
383 int ret; \
384 \
385 tstruct; \
386 \
387 return ret; \
388 }
389
390 #undef DEFINE_EVENT
391 #define DEFINE_EVENT(template, name, proto, args)
392
393 #undef DEFINE_EVENT_PRINT
394 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
395 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
396
397 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
398
399 /*
400 * remember the offset of each array from the beginning of the event.
401 */
402
403 #undef __entry
404 #define __entry entry
405
406 #undef __field
407 #define __field(type, item)
408
409 #undef __field_ext
410 #define __field_ext(type, item, filter_type)
411
412 #undef __field_struct
413 #define __field_struct(type, item)
414
415 #undef __field_struct_ext
416 #define __field_struct_ext(type, item, filter_type)
417
418 #undef __array
419 #define __array(type, item, len)
420
421 #undef __dynamic_array
422 #define __dynamic_array(type, item, len) \
423 __item_length = (len) * sizeof(type); \
424 __data_offsets->item = __data_size + \
425 offsetof(typeof(*entry), __data); \
426 __data_offsets->item |= __item_length << 16; \
427 __data_size += __item_length;
428
429 #undef __string
430 #define __string(item, src) __dynamic_array(char, item, \
431 strlen((src) ? (const char *)(src) : "(null)") + 1)
432
433 /*
434 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
435 * num_possible_cpus().
436 */
437 #define __bitmask_size_in_bytes_raw(nr_bits) \
438 (((nr_bits) + 7) / 8)
439
440 #define __bitmask_size_in_longs(nr_bits) \
441 ((__bitmask_size_in_bytes_raw(nr_bits) + \
442 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
443
444 /*
445 * __bitmask_size_in_bytes is the number of bytes needed to hold
446 * num_possible_cpus() padded out to the nearest long. This is what
447 * is saved in the buffer, just to be consistent.
448 */
449 #define __bitmask_size_in_bytes(nr_bits) \
450 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
451
452 #undef __bitmask
453 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
454 __bitmask_size_in_longs(nr_bits))
455
456 #undef DECLARE_EVENT_CLASS
457 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
458 static inline notrace int ftrace_get_offsets_##call( \
459 struct ftrace_data_offsets_##call *__data_offsets, proto) \
460 { \
461 int __data_size = 0; \
462 int __maybe_unused __item_length; \
463 struct ftrace_raw_##call __maybe_unused *entry; \
464 \
465 tstruct; \
466 \
467 return __data_size; \
468 }
469
470 #undef DEFINE_EVENT
471 #define DEFINE_EVENT(template, name, proto, args)
472
473 #undef DEFINE_EVENT_PRINT
474 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
475 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
476
477 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
478
479 /*
480 * Stage 4 of the trace events.
481 *
482 * Override the macros in <trace/trace_events.h> to include the following:
483 *
484 * For those macros defined with TRACE_EVENT:
485 *
486 * static struct ftrace_event_call event_<call>;
487 *
488 * static void ftrace_raw_event_<call>(void *__data, proto)
489 * {
490 * struct ftrace_event_file *ftrace_file = __data;
491 * struct ftrace_event_call *event_call = ftrace_file->event_call;
492 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
493 * unsigned long eflags = ftrace_file->flags;
494 * enum event_trigger_type __tt = ETT_NONE;
495 * struct ring_buffer_event *event;
496 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
497 * struct ring_buffer *buffer;
498 * unsigned long irq_flags;
499 * int __data_size;
500 * int pc;
501 *
502 * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
503 * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
504 * event_triggers_call(ftrace_file, NULL);
505 * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
506 * return;
507 * }
508 *
509 * local_save_flags(irq_flags);
510 * pc = preempt_count();
511 *
512 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
513 *
514 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
515 * event_<call>->event.type,
516 * sizeof(*entry) + __data_size,
517 * irq_flags, pc);
518 * if (!event)
519 * return;
520 * entry = ring_buffer_event_data(event);
521 *
522 * { <assign>; } <-- Here we assign the entries by the __field and
523 * __array macros.
524 *
525 * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
526 * __tt = event_triggers_call(ftrace_file, entry);
527 *
528 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
529 * &ftrace_file->flags))
530 * ring_buffer_discard_commit(buffer, event);
531 * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
532 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
533 *
534 * if (__tt)
535 * event_triggers_post_call(ftrace_file, __tt);
536 * }
537 *
538 * static struct trace_event ftrace_event_type_<call> = {
539 * .trace = ftrace_raw_output_<call>, <-- stage 2
540 * };
541 *
542 * static const char print_fmt_<call>[] = <TP_printk>;
543 *
544 * static struct ftrace_event_class __used event_class_<template> = {
545 * .system = "<system>",
546 * .define_fields = ftrace_define_fields_<call>,
547 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
548 * .raw_init = trace_event_raw_init,
549 * .probe = ftrace_raw_event_##call,
550 * .reg = ftrace_event_reg,
551 * };
552 *
553 * static struct ftrace_event_call event_<call> = {
554 * .class = event_class_<template>,
555 * {
556 * .tp = &__tracepoint_<call>,
557 * },
558 * .event = &ftrace_event_type_<call>,
559 * .print_fmt = print_fmt_<call>,
560 * .flags = TRACE_EVENT_FL_TRACEPOINT,
561 * };
562 * // its only safe to use pointers when doing linker tricks to
563 * // create an array.
564 * static struct ftrace_event_call __used
565 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
566 *
567 */
568
569 #ifdef CONFIG_PERF_EVENTS
570
571 #define _TRACE_PERF_PROTO(call, proto) \
572 static notrace void \
573 perf_trace_##call(void *__data, proto);
574
575 #define _TRACE_PERF_INIT(call) \
576 .perf_probe = perf_trace_##call,
577
578 #else
579 #define _TRACE_PERF_PROTO(call, proto)
580 #define _TRACE_PERF_INIT(call)
581 #endif /* CONFIG_PERF_EVENTS */
582
583 #undef __entry
584 #define __entry entry
585
586 #undef __field
587 #define __field(type, item)
588
589 #undef __field_struct
590 #define __field_struct(type, item)
591
592 #undef __array
593 #define __array(type, item, len)
594
595 #undef __dynamic_array
596 #define __dynamic_array(type, item, len) \
597 __entry->__data_loc_##item = __data_offsets.item;
598
599 #undef __string
600 #define __string(item, src) __dynamic_array(char, item, -1)
601
602 #undef __assign_str
603 #define __assign_str(dst, src) \
604 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
605
606 #undef __bitmask
607 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
608
609 #undef __get_bitmask
610 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
611
612 #undef __assign_bitmask
613 #define __assign_bitmask(dst, src, nr_bits) \
614 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
615
616 #undef TP_fast_assign
617 #define TP_fast_assign(args...) args
618
619 #undef __perf_addr
620 #define __perf_addr(a) (a)
621
622 #undef __perf_count
623 #define __perf_count(c) (c)
624
625 #undef __perf_task
626 #define __perf_task(t) (t)
627
628 #undef DECLARE_EVENT_CLASS
629 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
630 \
631 static notrace void \
632 ftrace_raw_event_##call(void *__data, proto) \
633 { \
634 struct ftrace_event_file *ftrace_file = __data; \
635 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
636 struct ftrace_event_buffer fbuffer; \
637 struct ftrace_raw_##call *entry; \
638 int __data_size; \
639 \
640 if (ftrace_trigger_soft_disabled(ftrace_file)) \
641 return; \
642 \
643 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
644 \
645 entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
646 sizeof(*entry) + __data_size); \
647 \
648 if (!entry) \
649 return; \
650 \
651 tstruct \
652 \
653 { assign; } \
654 \
655 ftrace_event_buffer_commit(&fbuffer); \
656 }
657 /*
658 * The ftrace_test_probe is compiled out, it is only here as a build time check
659 * to make sure that if the tracepoint handling changes, the ftrace probe will
660 * fail to compile unless it too is updated.
661 */
662
663 #undef DEFINE_EVENT
664 #define DEFINE_EVENT(template, call, proto, args) \
665 static inline void ftrace_test_probe_##call(void) \
666 { \
667 check_trace_callback_type_##call(ftrace_raw_event_##template); \
668 }
669
670 #undef DEFINE_EVENT_PRINT
671 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
672
673 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
674
675 #undef __entry
676 #define __entry REC
677
678 #undef __print_flags
679 #undef __print_symbolic
680 #undef __print_hex
681 #undef __get_dynamic_array
682 #undef __get_dynamic_array_len
683 #undef __get_str
684 #undef __get_bitmask
685 #undef __print_array
686
687 #undef TP_printk
688 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
689
690 #undef DECLARE_EVENT_CLASS
691 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
692 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
693 static const char print_fmt_##call[] = print; \
694 static struct ftrace_event_class __used __refdata event_class_##call = { \
695 .system = __stringify(TRACE_SYSTEM), \
696 .define_fields = ftrace_define_fields_##call, \
697 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
698 .raw_init = trace_event_raw_init, \
699 .probe = ftrace_raw_event_##call, \
700 .reg = ftrace_event_reg, \
701 _TRACE_PERF_INIT(call) \
702 };
703
704 #undef DEFINE_EVENT
705 #define DEFINE_EVENT(template, call, proto, args) \
706 \
707 static struct ftrace_event_call __used event_##call = { \
708 .class = &event_class_##template, \
709 { \
710 .tp = &__tracepoint_##call, \
711 }, \
712 .event.funcs = &ftrace_event_type_funcs_##template, \
713 .print_fmt = print_fmt_##template, \
714 .flags = TRACE_EVENT_FL_TRACEPOINT, \
715 }; \
716 static struct ftrace_event_call __used \
717 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
718
719 #undef DEFINE_EVENT_PRINT
720 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
721 \
722 static const char print_fmt_##call[] = print; \
723 \
724 static struct ftrace_event_call __used event_##call = { \
725 .class = &event_class_##template, \
726 { \
727 .tp = &__tracepoint_##call, \
728 }, \
729 .event.funcs = &ftrace_event_type_funcs_##call, \
730 .print_fmt = print_fmt_##call, \
731 .flags = TRACE_EVENT_FL_TRACEPOINT, \
732 }; \
733 static struct ftrace_event_call __used \
734 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
735
736 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
737
738
739 #ifdef CONFIG_PERF_EVENTS
740
741 #undef __entry
742 #define __entry entry
743
744 #undef __get_dynamic_array
745 #define __get_dynamic_array(field) \
746 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
747
748 #undef __get_dynamic_array_len
749 #define __get_dynamic_array_len(field) \
750 ((__entry->__data_loc_##field >> 16) & 0xffff)
751
752 #undef __get_str
753 #define __get_str(field) (char *)__get_dynamic_array(field)
754
755 #undef __get_bitmask
756 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
757
758 #undef __perf_addr
759 #define __perf_addr(a) (__addr = (a))
760
761 #undef __perf_count
762 #define __perf_count(c) (__count = (c))
763
764 #undef __perf_task
765 #define __perf_task(t) (__task = (t))
766
767 #undef DECLARE_EVENT_CLASS
768 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
769 static notrace void \
770 perf_trace_##call(void *__data, proto) \
771 { \
772 struct ftrace_event_call *event_call = __data; \
773 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
774 struct ftrace_raw_##call *entry; \
775 struct pt_regs *__regs; \
776 u64 __addr = 0, __count = 1; \
777 struct task_struct *__task = NULL; \
778 struct hlist_head *head; \
779 int __entry_size; \
780 int __data_size; \
781 int rctx; \
782 \
783 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
784 \
785 head = this_cpu_ptr(event_call->perf_events); \
786 if (__builtin_constant_p(!__task) && !__task && \
787 hlist_empty(head)) \
788 return; \
789 \
790 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
791 sizeof(u64)); \
792 __entry_size -= sizeof(u32); \
793 \
794 entry = perf_trace_buf_prepare(__entry_size, \
795 event_call->event.type, &__regs, &rctx); \
796 if (!entry) \
797 return; \
798 \
799 perf_fetch_caller_regs(__regs); \
800 \
801 tstruct \
802 \
803 { assign; } \
804 \
805 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
806 __count, __regs, head, __task); \
807 }
808
809 /*
810 * This part is compiled out, it is only here as a build time check
811 * to make sure that if the tracepoint handling changes, the
812 * perf probe will fail to compile unless it too is updated.
813 */
814 #undef DEFINE_EVENT
815 #define DEFINE_EVENT(template, call, proto, args) \
816 static inline void perf_test_probe_##call(void) \
817 { \
818 check_trace_callback_type_##call(perf_trace_##template); \
819 }
820
821
822 #undef DEFINE_EVENT_PRINT
823 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
824 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
825
826 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
827 #endif /* CONFIG_PERF_EVENTS */
828
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