7dcdfd824aab62c36e33bbf0bf05adbab1626a3e
[linux-2.6.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 __array
48 #define __array(type, item, len)        type    item[len];
49
50 #undef __dynamic_array
51 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
52
53 #undef __string
54 #define __string(item, src) __dynamic_array(char, item, -1)
55
56 #undef TP_STRUCT__entry
57 #define TP_STRUCT__entry(args...) args
58
59 #undef DECLARE_EVENT_CLASS
60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
61         struct ftrace_raw_##name {                                      \
62                 struct trace_entry      ent;                            \
63                 tstruct                                                 \
64                 char                    __data[0];                      \
65         };                                                              \
66                                                                         \
67         static struct ftrace_event_class event_class_##name;
68
69 #undef DEFINE_EVENT
70 #define DEFINE_EVENT(template, name, proto, args)       \
71         static struct ftrace_event_call                 \
72         __attribute__((__aligned__(4))) event_##name
73
74 #undef DEFINE_EVENT_PRINT
75 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
76         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
77
78 #undef __cpparg
79 #define __cpparg(arg...) arg
80
81 /* Callbacks are meaningless to ftrace. */
82 #undef TRACE_EVENT_FN
83 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
84                 assign, print, reg, unreg)                              \
85         TRACE_EVENT(name, __cpparg(proto), __cpparg(args),              \
86                 __cpparg(tstruct), __cpparg(assign), __cpparg(print))   \
87
88 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
89
90
91 /*
92  * Stage 2 of the trace events.
93  *
94  * Include the following:
95  *
96  * struct ftrace_data_offsets_<call> {
97  *      u32                             <item1>;
98  *      u32                             <item2>;
99  *      [...]
100  * };
101  *
102  * The __dynamic_array() macro will create each u32 <item>, this is
103  * to keep the offset of each array from the beginning of the event.
104  * The size of an array is also encoded, in the higher 16 bits of <item>.
105  */
106
107 #undef __field
108 #define __field(type, item)
109
110 #undef __field_ext
111 #define __field_ext(type, item, filter_type)
112
113 #undef __array
114 #define __array(type, item, len)
115
116 #undef __dynamic_array
117 #define __dynamic_array(type, item, len)        u32 item;
118
119 #undef __string
120 #define __string(item, src) __dynamic_array(char, item, -1)
121
122 #undef DECLARE_EVENT_CLASS
123 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
124         struct ftrace_data_offsets_##call {                             \
125                 tstruct;                                                \
126         };
127
128 #undef DEFINE_EVENT
129 #define DEFINE_EVENT(template, name, proto, args)
130
131 #undef DEFINE_EVENT_PRINT
132 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
133         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
134
135 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
136
137 /*
138  * Stage 3 of the trace events.
139  *
140  * Override the macros in <trace/trace_events.h> to include the following:
141  *
142  * enum print_line_t
143  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
144  * {
145  *      struct trace_seq *s = &iter->seq;
146  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
147  *      struct trace_entry *entry;
148  *      struct trace_seq *p;
149  *      int ret;
150  *
151  *      entry = iter->ent;
152  *
153  *      if (entry->type != event_<call>.id) {
154  *              WARN_ON_ONCE(1);
155  *              return TRACE_TYPE_UNHANDLED;
156  *      }
157  *
158  *      field = (typeof(field))entry;
159  *
160  *      p = &get_cpu_var(ftrace_event_seq);
161  *      trace_seq_init(p);
162  *      ret = trace_seq_printf(s, "%s: ", <call>);
163  *      if (ret)
164  *              ret = trace_seq_printf(s, <TP_printk> "\n");
165  *      put_cpu();
166  *      if (!ret)
167  *              return TRACE_TYPE_PARTIAL_LINE;
168  *
169  *      return TRACE_TYPE_HANDLED;
170  * }
171  *
172  * This is the method used to print the raw event to the trace
173  * output format. Note, this is not needed if the data is read
174  * in binary.
175  */
176
177 #undef __entry
178 #define __entry field
179
180 #undef TP_printk
181 #define TP_printk(fmt, args...) fmt "\n", args
182
183 #undef __get_dynamic_array
184 #define __get_dynamic_array(field)      \
185                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
186
187 #undef __get_str
188 #define __get_str(field) (char *)__get_dynamic_array(field)
189
190 #undef __print_flags
191 #define __print_flags(flag, delim, flag_array...)                       \
192         ({                                                              \
193                 static const struct trace_print_flags __flags[] =       \
194                         { flag_array, { -1, NULL }};                    \
195                 ftrace_print_flags_seq(p, delim, flag, __flags);        \
196         })
197
198 #undef __print_symbolic
199 #define __print_symbolic(value, symbol_array...)                        \
200         ({                                                              \
201                 static const struct trace_print_flags symbols[] =       \
202                         { symbol_array, { -1, NULL }};                  \
203                 ftrace_print_symbols_seq(p, value, symbols);            \
204         })
205
206 #undef DECLARE_EVENT_CLASS
207 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
208 static notrace enum print_line_t                                        \
209 ftrace_raw_output_id_##call(int event_id, const char *name,             \
210                             struct trace_iterator *iter, int flags)     \
211 {                                                                       \
212         struct trace_seq *s = &iter->seq;                               \
213         struct ftrace_raw_##call *field;                                \
214         struct trace_entry *entry;                                      \
215         struct trace_seq *p;                                            \
216         int ret;                                                        \
217                                                                         \
218         entry = iter->ent;                                              \
219                                                                         \
220         if (entry->type != event_id) {                                  \
221                 WARN_ON_ONCE(1);                                        \
222                 return TRACE_TYPE_UNHANDLED;                            \
223         }                                                               \
224                                                                         \
225         field = (typeof(field))entry;                                   \
226                                                                         \
227         p = &get_cpu_var(ftrace_event_seq);                             \
228         trace_seq_init(p);                                              \
229         ret = trace_seq_printf(s, "%s: ", name);                        \
230         if (ret)                                                        \
231                 ret = trace_seq_printf(s, print);                       \
232         put_cpu();                                                      \
233         if (!ret)                                                       \
234                 return TRACE_TYPE_PARTIAL_LINE;                         \
235                                                                         \
236         return TRACE_TYPE_HANDLED;                                      \
237 }
238
239 #undef DEFINE_EVENT
240 #define DEFINE_EVENT(template, name, proto, args)                       \
241 static notrace enum print_line_t                                        \
242 ftrace_raw_output_##name(struct trace_iterator *iter, int flags)        \
243 {                                                                       \
244         return ftrace_raw_output_id_##template(event_##name.id,         \
245                                                #name, iter, flags);     \
246 }
247
248 #undef DEFINE_EVENT_PRINT
249 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
250 static notrace enum print_line_t                                        \
251 ftrace_raw_output_##call(struct trace_iterator *iter, int flags)        \
252 {                                                                       \
253         struct trace_seq *s = &iter->seq;                               \
254         struct ftrace_raw_##template *field;                            \
255         struct trace_entry *entry;                                      \
256         struct trace_seq *p;                                            \
257         int ret;                                                        \
258                                                                         \
259         entry = iter->ent;                                              \
260                                                                         \
261         if (entry->type != event_##call.id) {                           \
262                 WARN_ON_ONCE(1);                                        \
263                 return TRACE_TYPE_UNHANDLED;                            \
264         }                                                               \
265                                                                         \
266         field = (typeof(field))entry;                                   \
267                                                                         \
268         p = &get_cpu_var(ftrace_event_seq);                             \
269         trace_seq_init(p);                                              \
270         ret = trace_seq_printf(s, "%s: ", #call);                       \
271         if (ret)                                                        \
272                 ret = trace_seq_printf(s, print);                       \
273         put_cpu();                                                      \
274         if (!ret)                                                       \
275                 return TRACE_TYPE_PARTIAL_LINE;                         \
276                                                                         \
277         return TRACE_TYPE_HANDLED;                                      \
278 }
279
280 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
281
282 #undef __field_ext
283 #define __field_ext(type, item, filter_type)                            \
284         ret = trace_define_field(event_call, #type, #item,              \
285                                  offsetof(typeof(field), item),         \
286                                  sizeof(field.item),                    \
287                                  is_signed_type(type), filter_type);    \
288         if (ret)                                                        \
289                 return ret;
290
291 #undef __field
292 #define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
293
294 #undef __array
295 #define __array(type, item, len)                                        \
296         BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                         \
297         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
298                                  offsetof(typeof(field), item),         \
299                                  sizeof(field.item),                    \
300                                  is_signed_type(type), FILTER_OTHER);   \
301         if (ret)                                                        \
302                 return ret;
303
304 #undef __dynamic_array
305 #define __dynamic_array(type, item, len)                                       \
306         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
307                                  offsetof(typeof(field), __data_loc_##item),   \
308                                  sizeof(field.__data_loc_##item),              \
309                                  is_signed_type(type), FILTER_OTHER);
310
311 #undef __string
312 #define __string(item, src) __dynamic_array(char, item, -1)
313
314 #undef DECLARE_EVENT_CLASS
315 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
316 static int notrace                                                      \
317 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
318 {                                                                       \
319         struct ftrace_raw_##call field;                                 \
320         int ret;                                                        \
321                                                                         \
322         tstruct;                                                        \
323                                                                         \
324         return ret;                                                     \
325 }
326
327 #undef DEFINE_EVENT
328 #define DEFINE_EVENT(template, name, proto, args)
329
330 #undef DEFINE_EVENT_PRINT
331 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
332         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
333
334 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
335
336 /*
337  * remember the offset of each array from the beginning of the event.
338  */
339
340 #undef __entry
341 #define __entry entry
342
343 #undef __field
344 #define __field(type, item)
345
346 #undef __field_ext
347 #define __field_ext(type, item, filter_type)
348
349 #undef __array
350 #define __array(type, item, len)
351
352 #undef __dynamic_array
353 #define __dynamic_array(type, item, len)                                \
354         __data_offsets->item = __data_size +                            \
355                                offsetof(typeof(*entry), __data);        \
356         __data_offsets->item |= (len * sizeof(type)) << 16;             \
357         __data_size += (len) * sizeof(type);
358
359 #undef __string
360 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
361
362 #undef DECLARE_EVENT_CLASS
363 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
364 static inline notrace int ftrace_get_offsets_##call(                    \
365         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
366 {                                                                       \
367         int __data_size = 0;                                            \
368         struct ftrace_raw_##call __maybe_unused *entry;                 \
369                                                                         \
370         tstruct;                                                        \
371                                                                         \
372         return __data_size;                                             \
373 }
374
375 #undef DEFINE_EVENT
376 #define DEFINE_EVENT(template, name, proto, args)
377
378 #undef DEFINE_EVENT_PRINT
379 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
380         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
381
382 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
383
384 #ifdef CONFIG_PERF_EVENTS
385
386 /*
387  * Generate the functions needed for tracepoint perf_event support.
388  *
389  * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
390  *
391  * static int ftrace_profile_enable_<call>(void)
392  * {
393  *      return register_trace_<call>(ftrace_profile_<call>);
394  * }
395  *
396  * static void ftrace_profile_disable_<call>(void)
397  * {
398  *      unregister_trace_<call>(ftrace_profile_<call>);
399  * }
400  *
401  */
402
403 #undef DECLARE_EVENT_CLASS
404 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)
405
406 #undef DEFINE_EVENT
407 #define DEFINE_EVENT(template, name, proto, args)                       \
408                                                                         \
409 static void perf_trace_##name(proto);                                   \
410                                                                         \
411 static notrace int                                                      \
412 perf_trace_enable_##name(struct ftrace_event_call *unused)              \
413 {                                                                       \
414         return register_trace_##name(perf_trace_##name);                \
415 }                                                                       \
416                                                                         \
417 static notrace void                                                     \
418 perf_trace_disable_##name(struct ftrace_event_call *unused)             \
419 {                                                                       \
420         unregister_trace_##name(perf_trace_##name);                     \
421 }
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 #endif /* CONFIG_PERF_EVENTS */
430
431 /*
432  * Stage 4 of the trace events.
433  *
434  * Override the macros in <trace/trace_events.h> to include the following:
435  *
436  * For those macros defined with TRACE_EVENT:
437  *
438  * static struct ftrace_event_call event_<call>;
439  *
440  * static void ftrace_raw_event_<call>(proto)
441  * {
442  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
443  *      struct ring_buffer_event *event;
444  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
445  *      struct ring_buffer *buffer;
446  *      unsigned long irq_flags;
447  *      int __data_size;
448  *      int pc;
449  *
450  *      local_save_flags(irq_flags);
451  *      pc = preempt_count();
452  *
453  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
454  *
455  *      event = trace_current_buffer_lock_reserve(&buffer,
456  *                                event_<call>.id,
457  *                                sizeof(*entry) + __data_size,
458  *                                irq_flags, pc);
459  *      if (!event)
460  *              return;
461  *      entry   = ring_buffer_event_data(event);
462  *
463  *      { <assign>; }  <-- Here we assign the entries by the __field and
464  *                         __array macros.
465  *
466  *      if (!filter_current_check_discard(buffer, event_call, entry, event))
467  *              trace_current_buffer_unlock_commit(buffer,
468  *                                                 event, irq_flags, pc);
469  * }
470  *
471  * static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
472  * {
473  *      return register_trace_<call>(ftrace_raw_event_<call>);
474  * }
475  *
476  * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
477  * {
478  *      unregister_trace_<call>(ftrace_raw_event_<call>);
479  * }
480  *
481  * static struct trace_event ftrace_event_type_<call> = {
482  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
483  * };
484  *
485  * static const char print_fmt_<call>[] = <TP_printk>;
486  *
487  * static struct ftrace_event_class __used event_class_<template> = {
488  *      .system                 = "<system>",
489  * };
490  *
491  * static struct ftrace_event_call __used
492  * __attribute__((__aligned__(4)))
493  * __attribute__((section("_ftrace_events"))) event_<call> = {
494  *      .name                   = "<call>",
495  *      .class                  = event_class_<template>,
496  *      .raw_init               = trace_event_raw_init,
497  *      .regfunc                = ftrace_raw_reg_event_<call>,
498  *      .unregfunc              = ftrace_raw_unreg_event_<call>,
499  *      .print_fmt              = print_fmt_<call>,
500  *      .define_fields          = ftrace_define_fields_<call>,
501  * };
502  *
503  */
504
505 #ifdef CONFIG_PERF_EVENTS
506
507 #define _TRACE_PERF_INIT(call)                                          \
508         .perf_event_enable = perf_trace_enable_##call,                  \
509         .perf_event_disable = perf_trace_disable_##call,
510
511 #else
512 #define _TRACE_PERF_INIT(call)
513 #endif /* CONFIG_PERF_EVENTS */
514
515 #undef __entry
516 #define __entry entry
517
518 #undef __field
519 #define __field(type, item)
520
521 #undef __array
522 #define __array(type, item, len)
523
524 #undef __dynamic_array
525 #define __dynamic_array(type, item, len)                                \
526         __entry->__data_loc_##item = __data_offsets.item;
527
528 #undef __string
529 #define __string(item, src) __dynamic_array(char, item, -1)             \
530
531 #undef __assign_str
532 #define __assign_str(dst, src)                                          \
533         strcpy(__get_str(dst), src);
534
535 #undef TP_fast_assign
536 #define TP_fast_assign(args...) args
537
538 #undef TP_perf_assign
539 #define TP_perf_assign(args...)
540
541 #undef DECLARE_EVENT_CLASS
542 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
543                                                                         \
544 static notrace void                                                     \
545 ftrace_raw_event_id_##call(struct ftrace_event_call *event_call,        \
546                                        proto)                           \
547 {                                                                       \
548         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
549         struct ring_buffer_event *event;                                \
550         struct ftrace_raw_##call *entry;                                \
551         struct ring_buffer *buffer;                                     \
552         unsigned long irq_flags;                                        \
553         int __data_size;                                                \
554         int pc;                                                         \
555                                                                         \
556         local_save_flags(irq_flags);                                    \
557         pc = preempt_count();                                           \
558                                                                         \
559         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
560                                                                         \
561         event = trace_current_buffer_lock_reserve(&buffer,              \
562                                  event_call->id,                        \
563                                  sizeof(*entry) + __data_size,          \
564                                  irq_flags, pc);                        \
565         if (!event)                                                     \
566                 return;                                                 \
567         entry   = ring_buffer_event_data(event);                        \
568                                                                         \
569         tstruct                                                         \
570                                                                         \
571         { assign; }                                                     \
572                                                                         \
573         if (!filter_current_check_discard(buffer, event_call, entry, event)) \
574                 trace_nowake_buffer_unlock_commit(buffer,               \
575                                                   event, irq_flags, pc); \
576 }
577
578 #undef DEFINE_EVENT
579 #define DEFINE_EVENT(template, call, proto, args)                       \
580                                                                         \
581 static notrace void ftrace_raw_event_##call(proto)                      \
582 {                                                                       \
583         ftrace_raw_event_id_##template(&event_##call, args);            \
584 }                                                                       \
585                                                                         \
586 static notrace int                                                      \
587 ftrace_raw_reg_event_##call(struct ftrace_event_call *unused)           \
588 {                                                                       \
589         return register_trace_##call(ftrace_raw_event_##call);          \
590 }                                                                       \
591                                                                         \
592 static notrace void                                                     \
593 ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)         \
594 {                                                                       \
595         unregister_trace_##call(ftrace_raw_event_##call);               \
596 }                                                                       \
597                                                                         \
598 static struct trace_event ftrace_event_type_##call = {                  \
599         .trace                  = ftrace_raw_output_##call,             \
600 };
601
602 #undef DEFINE_EVENT_PRINT
603 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
604         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
605
606 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
607
608 #undef __entry
609 #define __entry REC
610
611 #undef __print_flags
612 #undef __print_symbolic
613 #undef __get_dynamic_array
614 #undef __get_str
615
616 #undef TP_printk
617 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
618
619 #undef DECLARE_EVENT_CLASS
620 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
621 static const char print_fmt_##call[] = print;                           \
622 static struct ftrace_event_class __used event_class_##call = {          \
623         .system                 = __stringify(TRACE_SYSTEM)             \
624 };
625
626 #undef DEFINE_EVENT
627 #define DEFINE_EVENT(template, call, proto, args)                       \
628                                                                         \
629 static struct ftrace_event_call __used                                  \
630 __attribute__((__aligned__(4)))                                         \
631 __attribute__((section("_ftrace_events"))) event_##call = {             \
632         .name                   = #call,                                \
633         .class                  = &event_class_##template,              \
634         .event                  = &ftrace_event_type_##call,            \
635         .raw_init               = trace_event_raw_init,                 \
636         .regfunc                = ftrace_raw_reg_event_##call,          \
637         .unregfunc              = ftrace_raw_unreg_event_##call,        \
638         .print_fmt              = print_fmt_##template,                 \
639         .define_fields          = ftrace_define_fields_##template,      \
640         _TRACE_PERF_INIT(call)                                  \
641 };
642
643 #undef DEFINE_EVENT_PRINT
644 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
645                                                                         \
646 static const char print_fmt_##call[] = print;                           \
647                                                                         \
648 static struct ftrace_event_call __used                                  \
649 __attribute__((__aligned__(4)))                                         \
650 __attribute__((section("_ftrace_events"))) event_##call = {             \
651         .name                   = #call,                                \
652         .class                  = &event_class_##template,              \
653         .event                  = &ftrace_event_type_##call,            \
654         .raw_init               = trace_event_raw_init,                 \
655         .regfunc                = ftrace_raw_reg_event_##call,          \
656         .unregfunc              = ftrace_raw_unreg_event_##call,        \
657         .print_fmt              = print_fmt_##call,                     \
658         .define_fields          = ftrace_define_fields_##template,      \
659         _TRACE_PERF_INIT(call)                                  \
660 }
661
662 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
663
664 /*
665  * Define the insertion callback to perf events
666  *
667  * The job is very similar to ftrace_raw_event_<call> except that we don't
668  * insert in the ring buffer but in a perf counter.
669  *
670  * static void ftrace_perf_<call>(proto)
671  * {
672  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
673  *      struct ftrace_event_call *event_call = &event_<call>;
674  *      extern void perf_tp_event(int, u64, u64, void *, int);
675  *      struct ftrace_raw_##call *entry;
676  *      struct perf_trace_buf *trace_buf;
677  *      u64 __addr = 0, __count = 1;
678  *      unsigned long irq_flags;
679  *      struct trace_entry *ent;
680  *      int __entry_size;
681  *      int __data_size;
682  *      int __cpu
683  *      int pc;
684  *
685  *      pc = preempt_count();
686  *
687  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
688  *
689  *      // Below we want to get the aligned size by taking into account
690  *      // the u32 field that will later store the buffer size
691  *      __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
692  *                           sizeof(u64));
693  *      __entry_size -= sizeof(u32);
694  *
695  *      // Protect the non nmi buffer
696  *      // This also protects the rcu read side
697  *      local_irq_save(irq_flags);
698  *      __cpu = smp_processor_id();
699  *
700  *      if (in_nmi())
701  *              trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
702  *      else
703  *              trace_buf = rcu_dereference_sched(perf_trace_buf);
704  *
705  *      if (!trace_buf)
706  *              goto end;
707  *
708  *      trace_buf = per_cpu_ptr(trace_buf, __cpu);
709  *
710  *      // Avoid recursion from perf that could mess up the buffer
711  *      if (trace_buf->recursion++)
712  *              goto end_recursion;
713  *
714  *      raw_data = trace_buf->buf;
715  *
716  *      // Make recursion update visible before entering perf_tp_event
717  *      // so that we protect from perf recursions.
718  *
719  *      barrier();
720  *
721  *      //zero dead bytes from alignment to avoid stack leak to userspace:
722  *      *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
723  *      entry = (struct ftrace_raw_<call> *)raw_data;
724  *      ent = &entry->ent;
725  *      tracing_generic_entry_update(ent, irq_flags, pc);
726  *      ent->type = event_call->id;
727  *
728  *      <tstruct> <- do some jobs with dynamic arrays
729  *
730  *      <assign>  <- affect our values
731  *
732  *      perf_tp_event(event_call->id, __addr, __count, entry,
733  *                   __entry_size);  <- submit them to perf counter
734  *
735  * }
736  */
737
738 #ifdef CONFIG_PERF_EVENTS
739
740 #undef __entry
741 #define __entry entry
742
743 #undef __get_dynamic_array
744 #define __get_dynamic_array(field)      \
745                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
746
747 #undef __get_str
748 #define __get_str(field) (char *)__get_dynamic_array(field)
749
750 #undef __perf_addr
751 #define __perf_addr(a) __addr = (a)
752
753 #undef __perf_count
754 #define __perf_count(c) __count = (c)
755
756 #undef DECLARE_EVENT_CLASS
757 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
758 static notrace void                                                     \
759 perf_trace_templ_##call(struct ftrace_event_call *event_call,           \
760                             proto)                                      \
761 {                                                                       \
762         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
763         struct ftrace_raw_##call *entry;                                \
764         u64 __addr = 0, __count = 1;                                    \
765         unsigned long irq_flags;                                        \
766         struct pt_regs *__regs;                                         \
767         int __entry_size;                                               \
768         int __data_size;                                                \
769         int rctx;                                                       \
770                                                                         \
771         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
772         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
773                              sizeof(u64));                              \
774         __entry_size -= sizeof(u32);                                    \
775                                                                         \
776         if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE,               \
777                       "profile buffer not large enough"))               \
778                 return;                                                 \
779         entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare(     \
780                 __entry_size, event_call->id, &rctx, &irq_flags);       \
781         if (!entry)                                                     \
782                 return;                                                 \
783         tstruct                                                         \
784                                                                         \
785         { assign; }                                                     \
786                                                                         \
787         __regs = &__get_cpu_var(perf_trace_regs);                       \
788         perf_fetch_caller_regs(__regs, 2);                              \
789                                                                         \
790         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
791                                __count, irq_flags, __regs);             \
792 }
793
794 #undef DEFINE_EVENT
795 #define DEFINE_EVENT(template, call, proto, args)               \
796 static notrace void perf_trace_##call(proto)                    \
797 {                                                               \
798         struct ftrace_event_call *event_call = &event_##call;   \
799                                                                 \
800         perf_trace_templ_##template(event_call, args);          \
801 }
802
803 #undef DEFINE_EVENT_PRINT
804 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
805         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
806
807 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
808 #endif /* CONFIG_PERF_EVENTS */
809
810 #undef _TRACE_PROFILE_INIT
811