1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Stage 1 of the trace events.
5 * Override the macros in the event tracepoint header <trace/events/XXX.h>
6 * to include the following:
8 * struct trace_event_raw_<call> {
9 * struct trace_entry ent;
11 * <type2> <item2>[<len>];
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
21 #include <linux/trace_events.h>
23 #ifndef TRACE_SYSTEM_VAR
24 #define TRACE_SYSTEM_VAR TRACE_SYSTEM
27 #define __app__(x, y) str__##x##y
28 #define __app(x, y) __app__(x, y)
30 #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
32 #define TRACE_MAKE_SYSTEM_STR() \
33 static const char TRACE_SYSTEM_STRING[] = \
34 __stringify(TRACE_SYSTEM)
36 TRACE_MAKE_SYSTEM_STR();
38 #undef TRACE_DEFINE_ENUM
39 #define TRACE_DEFINE_ENUM(a) \
40 static struct trace_eval_map __used __initdata \
41 __##TRACE_SYSTEM##_##a = \
43 .system = TRACE_SYSTEM_STRING, \
47 static struct trace_eval_map __used \
48 __section("_ftrace_eval_map") \
49 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
51 #undef TRACE_DEFINE_SIZEOF
52 #define TRACE_DEFINE_SIZEOF(a) \
53 static struct trace_eval_map __used __initdata \
54 __##TRACE_SYSTEM##_##a = \
56 .system = TRACE_SYSTEM_STRING, \
57 .eval_string = "sizeof(" #a ")", \
58 .eval_value = sizeof(a) \
60 static struct trace_eval_map __used \
61 __section("_ftrace_eval_map") \
62 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
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.
71 * TRACE_EVENT is a one to one mapping between tracepoint and template.
74 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
75 DECLARE_EVENT_CLASS(name, \
81 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
85 #define __field(type, item) type item;
88 #define __field_ext(type, item, filter_type) type item;
91 #define __field_struct(type, item) type item;
93 #undef __field_struct_ext
94 #define __field_struct_ext(type, item, filter_type) type item;
97 #define __array(type, item, len) type item[len];
99 #undef __dynamic_array
100 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
103 #define __string(item, src) __dynamic_array(char, item, -1)
106 #define __string_len(item, src, len) __dynamic_array(char, item, -1)
109 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
112 #define __sockaddr(field, len) __dynamic_array(u8, field, len)
114 #undef __rel_dynamic_array
115 #define __rel_dynamic_array(type, item, len) u32 __rel_loc_##item;
118 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1)
120 #undef __rel_string_len
121 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1)
124 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(char, item, -1)
126 #undef __rel_sockaddr
127 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
129 #undef TP_STRUCT__entry
130 #define TP_STRUCT__entry(args...) args
132 #undef DECLARE_EVENT_CLASS
133 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
134 struct trace_event_raw_##name { \
135 struct trace_entry ent; \
140 static struct trace_event_class event_class_##name;
143 #define DEFINE_EVENT(template, name, proto, args) \
144 static struct trace_event_call __used \
145 __attribute__((__aligned__(4))) event_##name
147 #undef DEFINE_EVENT_FN
148 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
149 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
151 #undef DEFINE_EVENT_PRINT
152 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
153 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
155 /* Callbacks are meaningless to ftrace. */
156 #undef TRACE_EVENT_FN
157 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
158 assign, print, reg, unreg) \
159 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
160 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
162 #undef TRACE_EVENT_FN_COND
163 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
164 assign, print, reg, unreg) \
165 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
166 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
168 #undef TRACE_EVENT_FLAGS
169 #define TRACE_EVENT_FLAGS(name, value) \
170 __TRACE_EVENT_FLAGS(name, value)
172 #undef TRACE_EVENT_PERF_PERM
173 #define TRACE_EVENT_PERF_PERM(name, expr...) \
174 __TRACE_EVENT_PERF_PERM(name, expr)
176 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
179 * Stage 2 of the trace events.
181 * Include the following:
183 * struct trace_event_data_offsets_<call> {
189 * The __dynamic_array() macro will create each u32 <item>, this is
190 * to keep the offset of each array from the beginning of the event.
191 * The size of an array is also encoded, in the higher 16 bits of <item>.
194 #undef TRACE_DEFINE_ENUM
195 #define TRACE_DEFINE_ENUM(a)
197 #undef TRACE_DEFINE_SIZEOF
198 #define TRACE_DEFINE_SIZEOF(a)
201 #define __field(type, item)
204 #define __field_ext(type, item, filter_type)
206 #undef __field_struct
207 #define __field_struct(type, item)
209 #undef __field_struct_ext
210 #define __field_struct_ext(type, item, filter_type)
213 #define __array(type, item, len)
215 #undef __dynamic_array
216 #define __dynamic_array(type, item, len) u32 item;
219 #define __string(item, src) __dynamic_array(char, item, -1)
222 #define __string_len(item, src, len) __dynamic_array(char, item, -1)
225 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
228 #define __sockaddr(field, len) __dynamic_array(u8, field, len)
230 #undef __rel_dynamic_array
231 #define __rel_dynamic_array(type, item, len) u32 item;
234 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1)
236 #undef __rel_string_len
237 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1)
240 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
242 #undef __rel_sockaddr
243 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
245 #undef DECLARE_EVENT_CLASS
246 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
247 struct trace_event_data_offsets_##call { \
252 #define DEFINE_EVENT(template, name, proto, args)
254 #undef DEFINE_EVENT_PRINT
255 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
257 #undef TRACE_EVENT_FLAGS
258 #define TRACE_EVENT_FLAGS(event, flag)
260 #undef TRACE_EVENT_PERF_PERM
261 #define TRACE_EVENT_PERF_PERM(event, expr...)
263 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
266 * Stage 3 of the trace events.
268 * Override the macros in the event tracepoint header <trace/events/XXX.h>
269 * to include the following:
272 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
274 * struct trace_seq *s = &iter->seq;
275 * struct trace_event_raw_<call> *field; <-- defined in stage 1
276 * struct trace_seq *p = &iter->tmp_seq;
278 * -------(for event)-------
280 * struct trace_entry *entry;
284 * if (entry->type != event_<call>->event.type) {
286 * return TRACE_TYPE_UNHANDLED;
289 * field = (typeof(field))entry;
292 * return trace_output_call(iter, <call>, <TP_printk> "\n");
294 * ------(or, for event class)------
298 * field = (typeof(field))iter->ent;
300 * ret = trace_raw_output_prep(iter, trace_event);
301 * if (ret != TRACE_TYPE_HANDLED)
304 * trace_event_printf(iter, <TP_printk> "\n");
306 * return trace_handle_return(s);
310 * This is the method used to print the raw event to the trace
311 * output format. Note, this is not needed if the data is read
316 #define __entry field
319 #define TP_printk(fmt, args...) fmt "\n", args
321 #undef __get_dynamic_array
322 #define __get_dynamic_array(field) \
323 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
325 #undef __get_dynamic_array_len
326 #define __get_dynamic_array_len(field) \
327 ((__entry->__data_loc_##field >> 16) & 0xffff)
330 #define __get_str(field) ((char *)__get_dynamic_array(field))
332 #undef __get_rel_dynamic_array
333 #define __get_rel_dynamic_array(field) \
335 offsetof(typeof(*__entry), __rel_loc_##field) + \
336 sizeof(__entry->__rel_loc_##field) + \
337 (__entry->__rel_loc_##field & 0xffff))
339 #undef __get_rel_dynamic_array_len
340 #define __get_rel_dynamic_array_len(field) \
341 ((__entry->__rel_loc_##field >> 16) & 0xffff)
344 #define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field))
347 #define __get_bitmask(field) \
349 void *__bitmask = __get_dynamic_array(field); \
350 unsigned int __bitmask_size; \
351 __bitmask_size = __get_dynamic_array_len(field); \
352 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
355 #undef __get_rel_bitmask
356 #define __get_rel_bitmask(field) \
358 void *__bitmask = __get_rel_dynamic_array(field); \
359 unsigned int __bitmask_size; \
360 __bitmask_size = __get_rel_dynamic_array_len(field); \
361 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
364 #undef __get_sockaddr
365 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
367 #undef __get_rel_sockaddr
368 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
371 #define __print_flags(flag, delim, flag_array...) \
373 static const struct trace_print_flags __flags[] = \
374 { flag_array, { -1, NULL }}; \
375 trace_print_flags_seq(p, delim, flag, __flags); \
378 #undef __print_symbolic
379 #define __print_symbolic(value, symbol_array...) \
381 static const struct trace_print_flags symbols[] = \
382 { symbol_array, { -1, NULL }}; \
383 trace_print_symbols_seq(p, value, symbols); \
386 #undef __print_flags_u64
387 #undef __print_symbolic_u64
388 #if BITS_PER_LONG == 32
389 #define __print_flags_u64(flag, delim, flag_array...) \
391 static const struct trace_print_flags_u64 __flags[] = \
392 { flag_array, { -1, NULL } }; \
393 trace_print_flags_seq_u64(p, delim, flag, __flags); \
396 #define __print_symbolic_u64(value, symbol_array...) \
398 static const struct trace_print_flags_u64 symbols[] = \
399 { symbol_array, { -1, NULL } }; \
400 trace_print_symbols_seq_u64(p, value, symbols); \
403 #define __print_flags_u64(flag, delim, flag_array...) \
404 __print_flags(flag, delim, flag_array)
406 #define __print_symbolic_u64(value, symbol_array...) \
407 __print_symbolic(value, symbol_array)
411 #define __print_hex(buf, buf_len) \
412 trace_print_hex_seq(p, buf, buf_len, false)
414 #undef __print_hex_str
415 #define __print_hex_str(buf, buf_len) \
416 trace_print_hex_seq(p, buf, buf_len, true)
419 #define __print_array(array, count, el_size) \
421 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
422 el_size != 4 && el_size != 8); \
423 trace_print_array_seq(p, array, count, el_size); \
426 #undef __print_hex_dump
427 #define __print_hex_dump(prefix_str, prefix_type, \
428 rowsize, groupsize, buf, len, ascii) \
429 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \
430 rowsize, groupsize, buf, len, ascii)
432 #undef __print_ns_to_secs
433 #define __print_ns_to_secs(value) \
435 u64 ____val = (u64)(value); \
436 do_div(____val, NSEC_PER_SEC); \
440 #undef __print_ns_without_secs
441 #define __print_ns_without_secs(value) \
443 u64 ____val = (u64)(value); \
444 (u32) do_div(____val, NSEC_PER_SEC); \
447 #undef DECLARE_EVENT_CLASS
448 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
449 static notrace enum print_line_t \
450 trace_raw_output_##call(struct trace_iterator *iter, int flags, \
451 struct trace_event *trace_event) \
453 struct trace_seq *s = &iter->seq; \
454 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
455 struct trace_event_raw_##call *field; \
458 field = (typeof(field))iter->ent; \
460 ret = trace_raw_output_prep(iter, trace_event); \
461 if (ret != TRACE_TYPE_HANDLED) \
464 trace_event_printf(iter, print); \
466 return trace_handle_return(s); \
468 static struct trace_event_functions trace_event_type_funcs_##call = { \
469 .trace = trace_raw_output_##call, \
472 #undef DEFINE_EVENT_PRINT
473 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
474 static notrace enum print_line_t \
475 trace_raw_output_##call(struct trace_iterator *iter, int flags, \
476 struct trace_event *event) \
478 struct trace_event_raw_##template *field; \
479 struct trace_entry *entry; \
480 struct trace_seq *p = &iter->tmp_seq; \
484 if (entry->type != event_##call.event.type) { \
486 return TRACE_TYPE_UNHANDLED; \
489 field = (typeof(field))entry; \
492 return trace_output_call(iter, #call, print); \
494 static struct trace_event_functions trace_event_type_funcs_##call = { \
495 .trace = trace_raw_output_##call, \
498 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
500 #define ALIGN_STRUCTFIELD(type) ((int)(__alignof__(struct {type b;})))
503 #define __field_ext(_type, _item, _filter_type) { \
504 .type = #_type, .name = #_item, \
505 .size = sizeof(_type), .align = ALIGN_STRUCTFIELD(_type), \
506 .is_signed = is_signed_type(_type), .filter_type = _filter_type },
508 #undef __field_struct_ext
509 #define __field_struct_ext(_type, _item, _filter_type) { \
510 .type = #_type, .name = #_item, \
511 .size = sizeof(_type), .align = ALIGN_STRUCTFIELD(_type), \
512 0, .filter_type = _filter_type },
515 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
517 #undef __field_struct
518 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
521 #define __array(_type, _item, _len) { \
522 .type = #_type"["__stringify(_len)"]", .name = #_item, \
523 .size = sizeof(_type[_len]), .align = ALIGN_STRUCTFIELD(_type), \
524 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
526 #undef __dynamic_array
527 #define __dynamic_array(_type, _item, _len) { \
528 .type = "__data_loc " #_type "[]", .name = #_item, \
529 .size = 4, .align = 4, \
530 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
533 #define __string(item, src) __dynamic_array(char, item, -1)
536 #define __string_len(item, src, len) __dynamic_array(char, item, -1)
539 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
542 #define __sockaddr(field, len) __dynamic_array(u8, field, len)
544 #undef __rel_dynamic_array
545 #define __rel_dynamic_array(_type, _item, _len) { \
546 .type = "__rel_loc " #_type "[]", .name = #_item, \
547 .size = 4, .align = 4, \
548 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER },
551 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1)
553 #undef __rel_string_len
554 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1)
557 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
559 #undef __rel_sockaddr
560 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
562 #undef DECLARE_EVENT_CLASS
563 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
564 static struct trace_event_fields trace_event_fields_##call[] = { \
568 #undef DEFINE_EVENT_PRINT
569 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
571 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
574 * remember the offset of each array from the beginning of the event.
578 #define __entry entry
581 #define __field(type, item)
584 #define __field_ext(type, item, filter_type)
586 #undef __field_struct
587 #define __field_struct(type, item)
589 #undef __field_struct_ext
590 #define __field_struct_ext(type, item, filter_type)
593 #define __array(type, item, len)
595 #undef __dynamic_array
596 #define __dynamic_array(type, item, len) \
597 __item_length = (len) * sizeof(type); \
598 __data_offsets->item = __data_size + \
599 offsetof(typeof(*entry), __data); \
600 __data_offsets->item |= __item_length << 16; \
601 __data_size += __item_length;
604 #define __string(item, src) __dynamic_array(char, item, \
605 strlen((src) ? (const char *)(src) : "(null)") + 1)
608 #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1)
610 #undef __rel_dynamic_array
611 #define __rel_dynamic_array(type, item, len) \
612 __item_length = (len) * sizeof(type); \
613 __data_offsets->item = __data_size + \
614 offsetof(typeof(*entry), __data) - \
615 offsetof(typeof(*entry), __rel_loc_##item) - \
617 __data_offsets->item |= __item_length << 16; \
618 __data_size += __item_length;
621 #define __rel_string(item, src) __rel_dynamic_array(char, item, \
622 strlen((src) ? (const char *)(src) : "(null)") + 1)
624 #undef __rel_string_len
625 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1)
627 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
628 * num_possible_cpus().
630 #define __bitmask_size_in_bytes_raw(nr_bits) \
631 (((nr_bits) + 7) / 8)
633 #define __bitmask_size_in_longs(nr_bits) \
634 ((__bitmask_size_in_bytes_raw(nr_bits) + \
635 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
638 * __bitmask_size_in_bytes is the number of bytes needed to hold
639 * num_possible_cpus() padded out to the nearest long. This is what
640 * is saved in the buffer, just to be consistent.
642 #define __bitmask_size_in_bytes(nr_bits) \
643 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
646 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
647 __bitmask_size_in_longs(nr_bits))
650 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \
651 __bitmask_size_in_longs(nr_bits))
654 #define __sockaddr(field, len) __dynamic_array(u8, field, len)
656 #undef __rel_sockaddr
657 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
659 #undef DECLARE_EVENT_CLASS
660 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
661 static inline notrace int trace_event_get_offsets_##call( \
662 struct trace_event_data_offsets_##call *__data_offsets, proto) \
664 int __data_size = 0; \
665 int __maybe_unused __item_length; \
666 struct trace_event_raw_##call __maybe_unused *entry; \
670 return __data_size; \
673 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
676 * Stage 4 of the trace events.
678 * Override the macros in the event tracepoint header <trace/events/XXX.h>
679 * to include the following:
681 * For those macros defined with TRACE_EVENT:
683 * static struct trace_event_call event_<call>;
685 * static void trace_event_raw_event_<call>(void *__data, proto)
687 * struct trace_event_file *trace_file = __data;
688 * struct trace_event_call *event_call = trace_file->event_call;
689 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
690 * unsigned long eflags = trace_file->flags;
691 * enum event_trigger_type __tt = ETT_NONE;
692 * struct ring_buffer_event *event;
693 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
694 * struct trace_buffer *buffer;
695 * unsigned long irq_flags;
699 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
700 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
701 * event_triggers_call(trace_file, NULL);
702 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
706 * local_save_flags(irq_flags);
707 * pc = preempt_count();
709 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
711 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
712 * event_<call>->event.type,
713 * sizeof(*entry) + __data_size,
717 * entry = ring_buffer_event_data(event);
719 * { <assign>; } <-- Here we assign the entries by the __field and
722 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
723 * __tt = event_triggers_call(trace_file, entry);
725 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
726 * &trace_file->flags))
727 * ring_buffer_discard_commit(buffer, event);
728 * else if (!filter_check_discard(trace_file, entry, buffer, event))
729 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
732 * event_triggers_post_call(trace_file, __tt);
735 * static struct trace_event ftrace_event_type_<call> = {
736 * .trace = trace_raw_output_<call>, <-- stage 2
739 * static char print_fmt_<call>[] = <TP_printk>;
741 * static struct trace_event_class __used event_class_<template> = {
742 * .system = "<system>",
743 * .fields_array = trace_event_fields_<call>,
744 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
745 * .raw_init = trace_event_raw_init,
746 * .probe = trace_event_raw_event_##call,
747 * .reg = trace_event_reg,
750 * static struct trace_event_call event_<call> = {
751 * .class = event_class_<template>,
753 * .tp = &__tracepoint_<call>,
755 * .event = &ftrace_event_type_<call>,
756 * .print_fmt = print_fmt_<call>,
757 * .flags = TRACE_EVENT_FL_TRACEPOINT,
759 * // its only safe to use pointers when doing linker tricks to
760 * // create an array.
761 * static struct trace_event_call __used
762 * __section("_ftrace_events") *__event_<call> = &event_<call>;
766 #ifdef CONFIG_PERF_EVENTS
768 #define _TRACE_PERF_PROTO(call, proto) \
769 static notrace void \
770 perf_trace_##call(void *__data, proto);
772 #define _TRACE_PERF_INIT(call) \
773 .perf_probe = perf_trace_##call,
776 #define _TRACE_PERF_PROTO(call, proto)
777 #define _TRACE_PERF_INIT(call)
778 #endif /* CONFIG_PERF_EVENTS */
781 #define __entry entry
784 #define __field(type, item)
786 #undef __field_struct
787 #define __field_struct(type, item)
790 #define __array(type, item, len)
792 #undef __dynamic_array
793 #define __dynamic_array(type, item, len) \
794 __entry->__data_loc_##item = __data_offsets.item;
797 #define __string(item, src) __dynamic_array(char, item, -1)
800 #define __string_len(item, src, len) __dynamic_array(char, item, -1)
803 #define __assign_str(dst, src) \
804 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
806 #undef __assign_str_len
807 #define __assign_str_len(dst, src, len) \
809 memcpy(__get_str(dst), (src), (len)); \
810 __get_str(dst)[len] = '\0'; \
814 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
817 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
819 #undef __assign_bitmask
820 #define __assign_bitmask(dst, src, nr_bits) \
821 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
824 #define __sockaddr(field, len) __dynamic_array(u8, field, len)
826 #undef __get_sockaddr
827 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
829 #define __assign_sockaddr(dest, src, len) \
830 memcpy(__get_dynamic_array(dest), src, len)
832 #undef __rel_dynamic_array
833 #define __rel_dynamic_array(type, item, len) \
834 __entry->__rel_loc_##item = __data_offsets.item;
837 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1)
839 #undef __rel_string_len
840 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1)
842 #undef __assign_rel_str
843 #define __assign_rel_str(dst, src) \
844 strcpy(__get_rel_str(dst), (src) ? (const char *)(src) : "(null)");
846 #undef __assign_rel_str_len
847 #define __assign_rel_str_len(dst, src, len) \
849 memcpy(__get_rel_str(dst), (src), (len)); \
850 __get_rel_str(dst)[len] = '\0'; \
854 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
856 #undef __get_rel_bitmask
857 #define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field)
859 #undef __assign_rel_bitmask
860 #define __assign_rel_bitmask(dst, src, nr_bits) \
861 memcpy(__get_rel_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
863 #undef __rel_sockaddr
864 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len)
866 #undef __get_rel_sockaddr
867 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
869 #define __assign_rel_sockaddr(dest, src, len) \
870 memcpy(__get_rel_dynamic_array(dest), src, len)
873 #undef TP_fast_assign
874 #define TP_fast_assign(args...) args
877 #define __perf_count(c) (c)
880 #define __perf_task(t) (t)
882 #undef DECLARE_EVENT_CLASS
883 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
885 static notrace void \
886 trace_event_raw_event_##call(void *__data, proto) \
888 struct trace_event_file *trace_file = __data; \
889 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
890 struct trace_event_buffer fbuffer; \
891 struct trace_event_raw_##call *entry; \
894 if (trace_trigger_soft_disabled(trace_file)) \
897 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
899 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
900 sizeof(*entry) + __data_size); \
909 trace_event_buffer_commit(&fbuffer); \
912 * The ftrace_test_probe is compiled out, it is only here as a build time check
913 * to make sure that if the tracepoint handling changes, the ftrace probe will
914 * fail to compile unless it too is updated.
918 #define DEFINE_EVENT(template, call, proto, args) \
919 static inline void ftrace_test_probe_##call(void) \
921 check_trace_callback_type_##call(trace_event_raw_event_##template); \
924 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
930 #undef __print_symbolic
932 #undef __print_hex_str
933 #undef __get_dynamic_array
934 #undef __get_dynamic_array_len
937 #undef __get_sockaddr
938 #undef __get_rel_dynamic_array
939 #undef __get_rel_dynamic_array_len
941 #undef __get_rel_bitmask
942 #undef __get_rel_sockaddr
944 #undef __print_hex_dump
947 * The below is not executed in the kernel. It is only what is
948 * displayed in the print format for userspace to parse.
950 #undef __print_ns_to_secs
951 #define __print_ns_to_secs(val) (val) / 1000000000UL
953 #undef __print_ns_without_secs
954 #define __print_ns_without_secs(val) (val) % 1000000000UL
957 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
959 #undef DECLARE_EVENT_CLASS
960 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
961 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
962 static char print_fmt_##call[] = print; \
963 static struct trace_event_class __used __refdata event_class_##call = { \
964 .system = TRACE_SYSTEM_STRING, \
965 .fields_array = trace_event_fields_##call, \
966 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
967 .raw_init = trace_event_raw_init, \
968 .probe = trace_event_raw_event_##call, \
969 .reg = trace_event_reg, \
970 _TRACE_PERF_INIT(call) \
974 #define DEFINE_EVENT(template, call, proto, args) \
976 static struct trace_event_call __used event_##call = { \
977 .class = &event_class_##template, \
979 .tp = &__tracepoint_##call, \
981 .event.funcs = &trace_event_type_funcs_##template, \
982 .print_fmt = print_fmt_##template, \
983 .flags = TRACE_EVENT_FL_TRACEPOINT, \
985 static struct trace_event_call __used \
986 __section("_ftrace_events") *__event_##call = &event_##call
988 #undef DEFINE_EVENT_PRINT
989 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
991 static char print_fmt_##call[] = print; \
993 static struct trace_event_call __used event_##call = { \
994 .class = &event_class_##template, \
996 .tp = &__tracepoint_##call, \
998 .event.funcs = &trace_event_type_funcs_##call, \
999 .print_fmt = print_fmt_##call, \
1000 .flags = TRACE_EVENT_FL_TRACEPOINT, \
1002 static struct trace_event_call __used \
1003 __section("_ftrace_events") *__event_##call = &event_##call
1005 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)