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KEYS: add missing permission check for request_key() destination
[linux/fpc-iii.git] / include / trace / ftrace.h
blobbb1f5d82ad4955b1c1ee75c1414ba5b09b00fed6
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 DECLARE_EVENT_CLASS
267 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
268 static notrace enum print_line_t \
269 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
270 struct trace_event *trace_event) \
271 { \
272 struct trace_seq *s = &iter->seq; \
273 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
274 struct ftrace_raw_##call *field; \
275 int ret; \
276 \
277 field = (typeof(field))iter->ent; \
278 \
279 ret = ftrace_raw_output_prep(iter, trace_event); \
280 if (ret) \
281 return ret; \
282 \
283 ret = trace_seq_printf(s, print); \
284 if (!ret) \
285 return TRACE_TYPE_PARTIAL_LINE; \
286 \
287 return TRACE_TYPE_HANDLED; \
288 } \
289 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
290 .trace = ftrace_raw_output_##call, \
291 };
292
293 #undef DEFINE_EVENT_PRINT
294 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
295 static notrace enum print_line_t \
296 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
297 struct trace_event *event) \
298 { \
299 struct ftrace_raw_##template *field; \
300 struct trace_entry *entry; \
301 struct trace_seq *p = &iter->tmp_seq; \
302 \
303 entry = iter->ent; \
304 \
305 if (entry->type != event_##call.event.type) { \
306 WARN_ON_ONCE(1); \
307 return TRACE_TYPE_UNHANDLED; \
308 } \
309 \
310 field = (typeof(field))entry; \
311 \
312 trace_seq_init(p); \
313 return ftrace_output_call(iter, #call, print); \
314 } \
315 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
316 .trace = ftrace_raw_output_##call, \
317 };
318
319 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
320
321 #undef __field_ext
322 #define __field_ext(type, item, filter_type) \
323 ret = trace_define_field(event_call, #type, #item, \
324 offsetof(typeof(field), item), \
325 sizeof(field.item), \
326 is_signed_type(type), filter_type); \
327 if (ret) \
328 return ret;
329
330 #undef __field_struct_ext
331 #define __field_struct_ext(type, item, filter_type) \
332 ret = trace_define_field(event_call, #type, #item, \
333 offsetof(typeof(field), item), \
334 sizeof(field.item), \
335 0, filter_type); \
336 if (ret) \
337 return ret;
338
339 #undef __field
340 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
341
342 #undef __field_struct
343 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
344
345 #undef __array
346 #define __array(type, item, len) \
347 do { \
348 char *type_str = #type"["__stringify(len)"]"; \
349 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
350 ret = trace_define_field(event_call, type_str, #item, \
351 offsetof(typeof(field), item), \
352 sizeof(field.item), \
353 is_signed_type(type), FILTER_OTHER); \
354 if (ret) \
355 return ret; \
356 } while (0);
357
358 #undef __dynamic_array
359 #define __dynamic_array(type, item, len) \
360 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
361 offsetof(typeof(field), __data_loc_##item), \
362 sizeof(field.__data_loc_##item), \
363 is_signed_type(type), FILTER_OTHER);
364
365 #undef __string
366 #define __string(item, src) __dynamic_array(char, item, -1)
367
368 #undef __bitmask
369 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
370
371 #undef DECLARE_EVENT_CLASS
372 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
373 static int notrace __init \
374 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
375 { \
376 struct ftrace_raw_##call field; \
377 int ret; \
378 \
379 tstruct; \
380 \
381 return ret; \
382 }
383
384 #undef DEFINE_EVENT
385 #define DEFINE_EVENT(template, name, proto, args)
386
387 #undef DEFINE_EVENT_PRINT
388 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
389 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
390
391 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
392
393 /*
394 * remember the offset of each array from the beginning of the event.
395 */
396
397 #undef __entry
398 #define __entry entry
399
400 #undef __field
401 #define __field(type, item)
402
403 #undef __field_ext
404 #define __field_ext(type, item, filter_type)
405
406 #undef __field_struct
407 #define __field_struct(type, item)
408
409 #undef __field_struct_ext
410 #define __field_struct_ext(type, item, filter_type)
411
412 #undef __array
413 #define __array(type, item, len)
414
415 #undef __dynamic_array
416 #define __dynamic_array(type, item, len) \
417 __item_length = (len) * sizeof(type); \
418 __data_offsets->item = __data_size + \
419 offsetof(typeof(*entry), __data); \
420 __data_offsets->item |= __item_length << 16; \
421 __data_size += __item_length;
422
423 #undef __string
424 #define __string(item, src) __dynamic_array(char, item, \
425 strlen((src) ? (const char *)(src) : "(null)") + 1)
426
427 /*
428 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
429 * num_possible_cpus().
430 */
431 #define __bitmask_size_in_bytes_raw(nr_bits) \
432 (((nr_bits) + 7) / 8)
433
434 #define __bitmask_size_in_longs(nr_bits) \
435 ((__bitmask_size_in_bytes_raw(nr_bits) + \
436 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
437
438 /*
439 * __bitmask_size_in_bytes is the number of bytes needed to hold
440 * num_possible_cpus() padded out to the nearest long. This is what
441 * is saved in the buffer, just to be consistent.
442 */
443 #define __bitmask_size_in_bytes(nr_bits) \
444 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
445
446 #undef __bitmask
447 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
448 __bitmask_size_in_longs(nr_bits))
449
450 #undef DECLARE_EVENT_CLASS
451 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
452 static inline notrace int ftrace_get_offsets_##call( \
453 struct ftrace_data_offsets_##call *__data_offsets, proto) \
454 { \
455 int __data_size = 0; \
456 int __maybe_unused __item_length; \
457 struct ftrace_raw_##call __maybe_unused *entry; \
458 \
459 tstruct; \
460 \
461 return __data_size; \
462 }
463
464 #undef DEFINE_EVENT
465 #define DEFINE_EVENT(template, name, proto, args)
466
467 #undef DEFINE_EVENT_PRINT
468 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
469 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
470
471 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
472
473 /*
474 * Stage 4 of the trace events.
475 *
476 * Override the macros in <trace/trace_events.h> to include the following:
477 *
478 * For those macros defined with TRACE_EVENT:
479 *
480 * static struct ftrace_event_call event_<call>;
481 *
482 * static void ftrace_raw_event_<call>(void *__data, proto)
483 * {
484 * struct ftrace_event_file *ftrace_file = __data;
485 * struct ftrace_event_call *event_call = ftrace_file->event_call;
486 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
487 * unsigned long eflags = ftrace_file->flags;
488 * enum event_trigger_type __tt = ETT_NONE;
489 * struct ring_buffer_event *event;
490 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
491 * struct ring_buffer *buffer;
492 * unsigned long irq_flags;
493 * int __data_size;
494 * int pc;
495 *
496 * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
497 * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
498 * event_triggers_call(ftrace_file, NULL);
499 * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
500 * return;
501 * }
502 *
503 * local_save_flags(irq_flags);
504 * pc = preempt_count();
505 *
506 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
507 *
508 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
509 * event_<call>->event.type,
510 * sizeof(*entry) + __data_size,
511 * irq_flags, pc);
512 * if (!event)
513 * return;
514 * entry = ring_buffer_event_data(event);
515 *
516 * { <assign>; } <-- Here we assign the entries by the __field and
517 * __array macros.
518 *
519 * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
520 * __tt = event_triggers_call(ftrace_file, entry);
521 *
522 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
523 * &ftrace_file->flags))
524 * ring_buffer_discard_commit(buffer, event);
525 * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
526 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
527 *
528 * if (__tt)
529 * event_triggers_post_call(ftrace_file, __tt);
530 * }
531 *
532 * static struct trace_event ftrace_event_type_<call> = {
533 * .trace = ftrace_raw_output_<call>, <-- stage 2
534 * };
535 *
536 * static const char print_fmt_<call>[] = <TP_printk>;
537 *
538 * static struct ftrace_event_class __used event_class_<template> = {
539 * .system = "<system>",
540 * .define_fields = ftrace_define_fields_<call>,
541 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
542 * .raw_init = trace_event_raw_init,
543 * .probe = ftrace_raw_event_##call,
544 * .reg = ftrace_event_reg,
545 * };
546 *
547 * static struct ftrace_event_call event_<call> = {
548 * .class = event_class_<template>,
549 * {
550 * .tp = &__tracepoint_<call>,
551 * },
552 * .event = &ftrace_event_type_<call>,
553 * .print_fmt = print_fmt_<call>,
554 * .flags = TRACE_EVENT_FL_TRACEPOINT,
555 * };
556 * // its only safe to use pointers when doing linker tricks to
557 * // create an array.
558 * static struct ftrace_event_call __used
559 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
560 *
561 */
562
563 #ifdef CONFIG_PERF_EVENTS
564
565 #define _TRACE_PERF_PROTO(call, proto) \
566 static notrace void \
567 perf_trace_##call(void *__data, proto);
568
569 #define _TRACE_PERF_INIT(call) \
570 .perf_probe = perf_trace_##call,
571
572 #else
573 #define _TRACE_PERF_PROTO(call, proto)
574 #define _TRACE_PERF_INIT(call)
575 #endif /* CONFIG_PERF_EVENTS */
576
577 #undef __entry
578 #define __entry entry
579
580 #undef __field
581 #define __field(type, item)
582
583 #undef __field_struct
584 #define __field_struct(type, item)
585
586 #undef __array
587 #define __array(type, item, len)
588
589 #undef __dynamic_array
590 #define __dynamic_array(type, item, len) \
591 __entry->__data_loc_##item = __data_offsets.item;
592
593 #undef __string
594 #define __string(item, src) __dynamic_array(char, item, -1)
595
596 #undef __assign_str
597 #define __assign_str(dst, src) \
598 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
599
600 #undef __bitmask
601 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
602
603 #undef __get_bitmask
604 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
605
606 #undef __assign_bitmask
607 #define __assign_bitmask(dst, src, nr_bits) \
608 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
609
610 #undef TP_fast_assign
611 #define TP_fast_assign(args...) args
612
613 #undef __perf_addr
614 #define __perf_addr(a) (a)
615
616 #undef __perf_count
617 #define __perf_count(c) (c)
618
619 #undef __perf_task
620 #define __perf_task(t) (t)
621
622 #undef DECLARE_EVENT_CLASS
623 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
624 \
625 static notrace void \
626 ftrace_raw_event_##call(void *__data, proto) \
627 { \
628 struct ftrace_event_file *ftrace_file = __data; \
629 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
630 struct ftrace_event_buffer fbuffer; \
631 struct ftrace_raw_##call *entry; \
632 int __data_size; \
633 \
634 if (ftrace_trigger_soft_disabled(ftrace_file)) \
635 return; \
636 \
637 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
638 \
639 entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
640 sizeof(*entry) + __data_size); \
641 \
642 if (!entry) \
643 return; \
644 \
645 tstruct \
646 \
647 { assign; } \
648 \
649 ftrace_event_buffer_commit(&fbuffer); \
650 }
651 /*
652 * The ftrace_test_probe is compiled out, it is only here as a build time check
653 * to make sure that if the tracepoint handling changes, the ftrace probe will
654 * fail to compile unless it too is updated.
655 */
656
657 #undef DEFINE_EVENT
658 #define DEFINE_EVENT(template, call, proto, args) \
659 static inline void ftrace_test_probe_##call(void) \
660 { \
661 check_trace_callback_type_##call(ftrace_raw_event_##template); \
662 }
663
664 #undef DEFINE_EVENT_PRINT
665 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
666
667 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
668
669 #undef __entry
670 #define __entry REC
671
672 #undef __print_flags
673 #undef __print_symbolic
674 #undef __print_hex
675 #undef __get_dynamic_array
676 #undef __get_dynamic_array_len
677 #undef __get_str
678 #undef __get_bitmask
679
680 #undef TP_printk
681 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
682
683 #undef DECLARE_EVENT_CLASS
684 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
685 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
686 static const char print_fmt_##call[] = print; \
687 static struct ftrace_event_class __used __refdata event_class_##call = { \
688 .system = __stringify(TRACE_SYSTEM), \
689 .define_fields = ftrace_define_fields_##call, \
690 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
691 .raw_init = trace_event_raw_init, \
692 .probe = ftrace_raw_event_##call, \
693 .reg = ftrace_event_reg, \
694 _TRACE_PERF_INIT(call) \
695 };
696
697 #undef DEFINE_EVENT
698 #define DEFINE_EVENT(template, call, proto, args) \
699 \
700 static struct ftrace_event_call __used event_##call = { \
701 .class = &event_class_##template, \
702 { \
703 .tp = &__tracepoint_##call, \
704 }, \
705 .event.funcs = &ftrace_event_type_funcs_##template, \
706 .print_fmt = print_fmt_##template, \
707 .flags = TRACE_EVENT_FL_TRACEPOINT, \
708 }; \
709 static struct ftrace_event_call __used \
710 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
711
712 #undef DEFINE_EVENT_PRINT
713 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
714 \
715 static const char print_fmt_##call[] = print; \
716 \
717 static struct ftrace_event_call __used event_##call = { \
718 .class = &event_class_##template, \
719 { \
720 .tp = &__tracepoint_##call, \
721 }, \
722 .event.funcs = &ftrace_event_type_funcs_##call, \
723 .print_fmt = print_fmt_##call, \
724 .flags = TRACE_EVENT_FL_TRACEPOINT, \
725 }; \
726 static struct ftrace_event_call __used \
727 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
728
729 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
730
731
732 #ifdef CONFIG_PERF_EVENTS
733
734 #undef __entry
735 #define __entry entry
736
737 #undef __get_dynamic_array
738 #define __get_dynamic_array(field) \
739 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
740
741 #undef __get_dynamic_array_len
742 #define __get_dynamic_array_len(field) \
743 ((__entry->__data_loc_##field >> 16) & 0xffff)
744
745 #undef __get_str
746 #define __get_str(field) (char *)__get_dynamic_array(field)
747
748 #undef __get_bitmask
749 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
750
751 #undef __perf_addr
752 #define __perf_addr(a) (__addr = (a))
753
754 #undef __perf_count
755 #define __perf_count(c) (__count = (c))
756
757 #undef __perf_task
758 #define __perf_task(t) (__task = (t))
759
760 #undef DECLARE_EVENT_CLASS
761 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
762 static notrace void \
763 perf_trace_##call(void *__data, proto) \
764 { \
765 struct ftrace_event_call *event_call = __data; \
766 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
767 struct ftrace_raw_##call *entry; \
768 struct pt_regs *__regs; \
769 u64 __addr = 0, __count = 1; \
770 struct task_struct *__task = NULL; \
771 struct hlist_head *head; \
772 int __entry_size; \
773 int __data_size; \
774 int rctx; \
775 \
776 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
777 \
778 head = this_cpu_ptr(event_call->perf_events); \
779 if (__builtin_constant_p(!__task) && !__task && \
780 hlist_empty(head)) \
781 return; \
782 \
783 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
784 sizeof(u64)); \
785 __entry_size -= sizeof(u32); \
786 \
787 entry = perf_trace_buf_prepare(__entry_size, \
788 event_call->event.type, &__regs, &rctx); \
789 if (!entry) \
790 return; \
791 \
792 perf_fetch_caller_regs(__regs); \
793 \
794 tstruct \
795 \
796 { assign; } \
797 \
798 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
799 __count, __regs, head, __task); \
800 }
801
802 /*
803 * This part is compiled out, it is only here as a build time check
804 * to make sure that if the tracepoint handling changes, the
805 * perf probe will fail to compile unless it too is updated.
806 */
807 #undef DEFINE_EVENT
808 #define DEFINE_EVENT(template, call, proto, args) \
809 static inline void perf_test_probe_##call(void) \
810 { \
811 check_trace_callback_type_##call(perf_trace_##template); \
812 }
813
814
815 #undef DEFINE_EVENT_PRINT
816 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
817 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
818
819 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
820 #endif /* CONFIG_PERF_EVENTS */
821
Linux with added FPC-III support