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Merge tag 'platform-drivers-x86-v4.11-2' of git://git.infradead.org/linux-platform...
[mirror_ubuntu-artful-kernel.git] / include / trace / trace_events.h
CommitLineData
f42c85e7
SR		 1/*
2 * Stage 1 of the trace events.
3 *
4 * Override the macros in <trace/trace_events.h> to include the following:
5 *
a7237765 6 * struct trace_event_raw_<call> {
f42c85e7
SR		 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
af658dca 19#include <linux/trace_events.h>
f42c85e7 20
acd388fd
SRRH		 21#ifndef TRACE_SYSTEM_VAR
22#define TRACE_SYSTEM_VAR TRACE_SYSTEM
23#endif
24
25#define __app__(x, y) str__##x##y
26#define __app(x, y) __app__(x, y)
27
28#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
29
30#define TRACE_MAKE_SYSTEM_STR() \
31 static const char TRACE_SYSTEM_STRING[] = \
32 __stringify(TRACE_SYSTEM)
33
34TRACE_MAKE_SYSTEM_STR();
35
0c564a53
SRRH		 36#undef TRACE_DEFINE_ENUM
37#define TRACE_DEFINE_ENUM(a) \
38 static struct trace_enum_map __used __initdata \
39 __##TRACE_SYSTEM##_##a = \
40 { \
41 .system = TRACE_SYSTEM_STRING, \
42 .enum_string = #a, \
43 .enum_value = a \
44 }; \
45 static struct trace_enum_map __used \
46 __attribute__((section("_ftrace_enum_map"))) \
47 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
48
ff038f5c 49/*
091ad365 50 * DECLARE_EVENT_CLASS can be used to add a generic function
ff038f5c
SR		 51 * handlers for events. That is, if all events have the same
52 * parameters and just have distinct trace points.
53 * Each tracepoint can be defined with DEFINE_EVENT and that
091ad365 54 * will map the DECLARE_EVENT_CLASS to the tracepoint.
ff038f5c
SR		 55 *
56 * TRACE_EVENT is a one to one mapping between tracepoint and template.
57 */
58#undef TRACE_EVENT
59#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
091ad365 60 DECLARE_EVENT_CLASS(name, \
ff038f5c
SR		 61 PARAMS(proto), \
62 PARAMS(args), \
63 PARAMS(tstruct), \
64 PARAMS(assign), \
65 PARAMS(print)); \
66 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
67
68
7fcb7c47
LZ		 69#undef __field
70#define __field(type, item) type item;
71
43b51ead
LZ		 72#undef __field_ext
73#define __field_ext(type, item, filter_type) type item;
74
4d4c9cc8
SR		 75#undef __field_struct
76#define __field_struct(type, item) type item;
77
78#undef __field_struct_ext
79#define __field_struct_ext(type, item, filter_type) type item;
80
f42c85e7
SR		 81#undef __array
82#define __array(type, item, len) type item[len];
83
7fcb7c47 84#undef __dynamic_array
7d536cb3 85#define __dynamic_array(type, item, len) u32 __data_loc_##item;
f42c85e7 86
9cbf1176 87#undef __string
7fcb7c47 88#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 89
4449bf92
SRRH		 90#undef __bitmask
91#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
92
f42c85e7
SR		 93#undef TP_STRUCT__entry
94#define TP_STRUCT__entry(args...) args
95
091ad365
IM		 96#undef DECLARE_EVENT_CLASS
97#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
a7237765 98 struct trace_event_raw_##name { \
ff038f5c
SR		 99 struct trace_entry ent; \
100 tstruct \
101 char __data[0]; \
8f082018
SR		 102 }; \
103 \
2425bcb9 104 static struct trace_event_class event_class_##name;
8f082018 105
ff038f5c
SR		 106#undef DEFINE_EVENT
107#define DEFINE_EVENT(template, name, proto, args) \
2425bcb9 108 static struct trace_event_call __used \
86c38a31 109 __attribute__((__aligned__(4))) event_##name
f42c85e7 110
f5abaa1b
SR		 111#undef DEFINE_EVENT_FN
112#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
113 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
114
e5bc9721
SR		 115#undef DEFINE_EVENT_PRINT
116#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
117 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
118
97419875
JS		 119/* Callbacks are meaningless to ftrace. */
120#undef TRACE_EVENT_FN
0dd7b747
FW		 121#define TRACE_EVENT_FN(name, proto, args, tstruct, \
122 assign, print, reg, unreg) \
819ce45a
FW		 123 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
124 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
2701121b
DK		 125
126#undef TRACE_EVENT_FN_COND
127#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
128 assign, print, reg, unreg) \
129 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
130 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
97419875 131
1ed0c597
FW		 132#undef TRACE_EVENT_FLAGS
133#define TRACE_EVENT_FLAGS(name, value) \
53cf810b 134 __TRACE_EVENT_FLAGS(name, value)
1ed0c597 135
d5b5f391
PZ		 136#undef TRACE_EVENT_PERF_PERM
137#define TRACE_EVENT_PERF_PERM(name, expr...) \
138 __TRACE_EVENT_PERF_PERM(name, expr)
139
f42c85e7
SR		 140#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
141
142/*
143 * Stage 2 of the trace events.
144 *
9cbf1176
FW		 145 * Include the following:
146 *
62323a14 147 * struct trace_event_data_offsets_<call> {
7d536cb3
LZ		 148 * u32 <item1>;
149 * u32 <item2>;
9cbf1176
FW		 150 * [...]
151 * };
152 *
7d536cb3 153 * The __dynamic_array() macro will create each u32 <item>, this is
7fcb7c47 154 * to keep the offset of each array from the beginning of the event.
7d536cb3 155 * The size of an array is also encoded, in the higher 16 bits of <item>.
9cbf1176
FW		 156 */
157
0c564a53
SRRH		 158#undef TRACE_DEFINE_ENUM
159#define TRACE_DEFINE_ENUM(a)
160
7fcb7c47 161#undef __field
43b51ead
LZ		 162#define __field(type, item)
163
164#undef __field_ext
165#define __field_ext(type, item, filter_type)
7fcb7c47 166
4d4c9cc8
SR		 167#undef __field_struct
168#define __field_struct(type, item)
169
170#undef __field_struct_ext
171#define __field_struct_ext(type, item, filter_type)
172
9cbf1176
FW		 173#undef __array
174#define __array(type, item, len)
175
7fcb7c47 176#undef __dynamic_array
7d536cb3 177#define __dynamic_array(type, item, len) u32 item;
9cbf1176
FW		 178
179#undef __string
7fcb7c47 180#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 181
4449bf92
SRRH		 182#undef __bitmask
183#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
184
091ad365
IM		 185#undef DECLARE_EVENT_CLASS
186#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
62323a14 187 struct trace_event_data_offsets_##call { \
9cbf1176
FW		 188 tstruct; \
189 };
190
ff038f5c
SR		 191#undef DEFINE_EVENT
192#define DEFINE_EVENT(template, name, proto, args)
193
e5bc9721
SR		 194#undef DEFINE_EVENT_PRINT
195#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
196 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
197
1ed0c597
FW		 198#undef TRACE_EVENT_FLAGS
199#define TRACE_EVENT_FLAGS(event, flag)
200
d5b5f391
PZ		 201#undef TRACE_EVENT_PERF_PERM
202#define TRACE_EVENT_PERF_PERM(event, expr...)
203
9cbf1176
FW		 204#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
205
206/*
207 * Stage 3 of the trace events.
208 *
f42c85e7
SR		 209 * Override the macros in <trace/trace_events.h> to include the following:
210 *
211 * enum print_line_t
892c505a 212 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
f42c85e7
SR		 213 * {
214 * struct trace_seq *s = &iter->seq;
a7237765 215 * struct trace_event_raw_<call> *field; <-- defined in stage 1
f42c85e7 216 * struct trace_entry *entry;
bc289ae9 217 * struct trace_seq *p = &iter->tmp_seq;
f42c85e7
SR		 218 * int ret;
219 *
220 * entry = iter->ent;
221 *
32c0edae 222 * if (entry->type != event_<call>->event.type) {
f42c85e7
SR		 223 * WARN_ON_ONCE(1);
224 * return TRACE_TYPE_UNHANDLED;
225 * }
226 *
227 * field = (typeof(field))entry;
228 *
56d8bd3f 229 * trace_seq_init(p);
50354a8a
LZ		 230 * ret = trace_seq_printf(s, "%s: ", <call>);
231 * if (ret)
232 * ret = trace_seq_printf(s, <TP_printk> "\n");
f42c85e7
SR		 233 * if (!ret)
234 * return TRACE_TYPE_PARTIAL_LINE;
235 *
236 * return TRACE_TYPE_HANDLED;
237 * }
238 *
239 * This is the method used to print the raw event to the trace
240 * output format. Note, this is not needed if the data is read
241 * in binary.
242 */
243
244#undef __entry
245#define __entry field
246
247#undef TP_printk
248#define TP_printk(fmt, args...) fmt "\n", args
249
7fcb7c47
LZ		 250#undef __get_dynamic_array
251#define __get_dynamic_array(field) \
7d536cb3 252 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
7fcb7c47 253
beba4bb0
SRRH		 254#undef __get_dynamic_array_len
255#define __get_dynamic_array_len(field) \
256 ((__entry->__data_loc_##field >> 16) & 0xffff)
257
9cbf1176 258#undef __get_str
934de5f2 259#define __get_str(field) ((char *)__get_dynamic_array(field))
9cbf1176 260
4449bf92
SRRH		 261#undef __get_bitmask
262#define __get_bitmask(field) \
263 ({ \
264 void *__bitmask = __get_dynamic_array(field); \
265 unsigned int __bitmask_size; \
beba4bb0 266 __bitmask_size = __get_dynamic_array_len(field); \
645df987 267 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
4449bf92
SRRH		 268 })
269
be74b73a
SR		 270#undef __print_flags
271#define __print_flags(flag, delim, flag_array...) \
272 ({ \
a48f494e 273 static const struct trace_print_flags __flags[] = \
be74b73a 274 { flag_array, { -1, NULL }}; \
645df987 275 trace_print_flags_seq(p, delim, flag, __flags); \
be74b73a
SR		 276 })
277
0f4fc29d
SR		 278#undef __print_symbolic
279#define __print_symbolic(value, symbol_array...) \
280 ({ \
281 static const struct trace_print_flags symbols[] = \
282 { symbol_array, { -1, NULL }}; \
645df987 283 trace_print_symbols_seq(p, value, symbols); \
0f4fc29d
SR		 284 })
285
d3213e8f 286#undef __print_flags_u64
2fc1b6f0 287#undef __print_symbolic_u64
288#if BITS_PER_LONG == 32
d3213e8f
RZ		 289#define __print_flags_u64(flag, delim, flag_array...) \
290 ({ \
291 static const struct trace_print_flags_u64 __flags[] = \
292 { flag_array, { -1, NULL } }; \
293 trace_print_flags_seq_u64(p, delim, flag, __flags); \
294 })
295
2fc1b6f0 296#define __print_symbolic_u64(value, symbol_array...) \
297 ({ \
298 static const struct trace_print_flags_u64 symbols[] = \
299 { symbol_array, { -1, NULL } }; \
645df987 300 trace_print_symbols_seq_u64(p, value, symbols); \
2fc1b6f0 301 })
302#else
d3213e8f
RZ		 303#define __print_flags_u64(flag, delim, flag_array...) \
304 __print_flags(flag, delim, flag_array)
305
2fc1b6f0 306#define __print_symbolic_u64(value, symbol_array...) \
307 __print_symbolic(value, symbol_array)
308#endif
309
5a2e3995 310#undef __print_hex
2acae0d5 311#define __print_hex(buf, buf_len) \
3898fac1 312 trace_print_hex_seq(p, buf, buf_len, false)
2acae0d5
DB		 313
314#undef __print_hex_str
315#define __print_hex_str(buf, buf_len) \
3898fac1 316 trace_print_hex_seq(p, buf, buf_len, true)
5a2e3995 317
6ea22486
DM		 318#undef __print_array
319#define __print_array(array, count, el_size) \
320 ({ \
321 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
322 el_size != 4 && el_size != 8); \
645df987 323 trace_print_array_seq(p, array, count, el_size); \
6ea22486
DM		 324 })
325
091ad365
IM		 326#undef DECLARE_EVENT_CLASS
327#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
83f0d539 328static notrace enum print_line_t \
892c505a
SRRH		 329trace_raw_output_##call(struct trace_iterator *iter, int flags, \
330 struct trace_event *trace_event) \
f42c85e7
SR		 331{ \
332 struct trace_seq *s = &iter->seq; \
f71130de 333 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
a7237765 334 struct trace_event_raw_##call *field; \
f42c85e7
SR		 335 int ret; \
336 \
f71130de 337 field = (typeof(field))iter->ent; \
80decc70 338 \
892c505a 339 ret = trace_raw_output_prep(iter, trace_event); \
8e2e095c 340 if (ret != TRACE_TYPE_HANDLED) \
f71130de
LZ		 341 return ret; \
342 \
19a7fe20 343 trace_seq_printf(s, print); \
f42c85e7 344 \
19a7fe20 345 return trace_handle_return(s); \
80decc70 346} \
3ad017ba 347static struct trace_event_functions trace_event_type_funcs_##call = { \
892c505a 348 .trace = trace_raw_output_##call, \
80decc70 349};
ff038f5c 350
e5bc9721
SR		 351#undef DEFINE_EVENT_PRINT
352#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
83f0d539 353static notrace enum print_line_t \
892c505a 354trace_raw_output_##call(struct trace_iterator *iter, int flags, \
a9a57763 355 struct trace_event *event) \
e5bc9721 356{ \
a7237765 357 struct trace_event_raw_##template *field; \
e5bc9721 358 struct trace_entry *entry; \
bc289ae9 359 struct trace_seq *p = &iter->tmp_seq; \
f42c85e7
SR		 360 \
361 entry = iter->ent; \
362 \
32c0edae 363 if (entry->type != event_##call.event.type) { \
f42c85e7
SR		 364 WARN_ON_ONCE(1); \
365 return TRACE_TYPE_UNHANDLED; \
366 } \
367 \
368 field = (typeof(field))entry; \
369 \
56d8bd3f 370 trace_seq_init(p); \
892c505a 371 return trace_output_call(iter, #call, print); \
80decc70 372} \
3ad017ba 373static struct trace_event_functions trace_event_type_funcs_##call = { \
892c505a 374 .trace = trace_raw_output_##call, \
80decc70 375};
e5bc9721 376
f42c85e7
SR		 377#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
378
43b51ead
LZ		 379#undef __field_ext
380#define __field_ext(type, item, filter_type) \
f42c85e7
SR		 381 ret = trace_define_field(event_call, #type, #item, \
382 offsetof(typeof(field), item), \
43b51ead
LZ		 383 sizeof(field.item), \
384 is_signed_type(type), filter_type); \
f42c85e7
SR		 385 if (ret) \
386 return ret;
387
4d4c9cc8
SR		 388#undef __field_struct_ext
389#define __field_struct_ext(type, item, filter_type) \
390 ret = trace_define_field(event_call, #type, #item, \
391 offsetof(typeof(field), item), \
392 sizeof(field.item), \
393 0, filter_type); \
394 if (ret) \
395 return ret;
396
43b51ead
LZ		 397#undef __field
398#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
399
4d4c9cc8
SR		 400#undef __field_struct
401#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
402
f42c85e7
SR		 403#undef __array
404#define __array(type, item, len) \
04295780 405 do { \
87291347 406 char *type_str = #type"["__stringify(len)"]"; \
04295780 407 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
87291347 408 ret = trace_define_field(event_call, type_str, #item, \
f42c85e7 409 offsetof(typeof(field), item), \
fb7ae981
LJ		 410 sizeof(field.item), \
411 is_signed_type(type), FILTER_OTHER); \
04295780
SR		 412 if (ret) \
413 return ret; \
414 } while (0);
f42c85e7 415
7fcb7c47
LZ		 416#undef __dynamic_array
417#define __dynamic_array(type, item, len) \
68fd60a8 418 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
43b51ead 419 offsetof(typeof(field), __data_loc_##item), \
fb7ae981
LJ		 420 sizeof(field.__data_loc_##item), \
421 is_signed_type(type), FILTER_OTHER);
7fcb7c47 422
9cbf1176 423#undef __string
7fcb7c47 424#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 425
4449bf92
SRRH		 426#undef __bitmask
427#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
428
091ad365
IM		 429#undef DECLARE_EVENT_CLASS
430#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
7e4f44b1 431static int notrace __init \
33d0f35e 432trace_event_define_fields_##call(struct trace_event_call *event_call) \
f42c85e7 433{ \
a7237765 434 struct trace_event_raw_##call field; \
f42c85e7
SR		 435 int ret; \
436 \
f42c85e7
SR		 437 tstruct; \
438 \
439 return ret; \
440}
441
ff038f5c
SR		 442#undef DEFINE_EVENT
443#define DEFINE_EVENT(template, name, proto, args)
444
e5bc9721
SR		 445#undef DEFINE_EVENT_PRINT
446#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
447 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
448
f42c85e7
SR		 449#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
450
7fcb7c47
LZ		 451/*
452 * remember the offset of each array from the beginning of the event.
453 */
454
455#undef __entry
456#define __entry entry
457
458#undef __field
459#define __field(type, item)
460
43b51ead
LZ		 461#undef __field_ext
462#define __field_ext(type, item, filter_type)
463
4d4c9cc8
SR		 464#undef __field_struct
465#define __field_struct(type, item)
466
467#undef __field_struct_ext
468#define __field_struct_ext(type, item, filter_type)
469
7fcb7c47
LZ		 470#undef __array
471#define __array(type, item, len)
472
473#undef __dynamic_array
474#define __dynamic_array(type, item, len) \
114e7b52 475 __item_length = (len) * sizeof(type); \
7fcb7c47
LZ		 476 __data_offsets->item = __data_size + \
477 offsetof(typeof(*entry), __data); \
114e7b52
FB		 478 __data_offsets->item |= __item_length << 16; \
479 __data_size += __item_length;
7fcb7c47
LZ		 480
481#undef __string
4e58e547
SRRH		 482#define __string(item, src) __dynamic_array(char, item, \
483 strlen((src) ? (const char *)(src) : "(null)") + 1)
7fcb7c47 484
4449bf92
SRRH		 485/*
486 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
487 * num_possible_cpus().
488 */
489#define __bitmask_size_in_bytes_raw(nr_bits) \
490 (((nr_bits) + 7) / 8)
491
492#define __bitmask_size_in_longs(nr_bits) \
493 ((__bitmask_size_in_bytes_raw(nr_bits) + \
494 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
495
496/*
497 * __bitmask_size_in_bytes is the number of bytes needed to hold
498 * num_possible_cpus() padded out to the nearest long. This is what
499 * is saved in the buffer, just to be consistent.
500 */
501#define __bitmask_size_in_bytes(nr_bits) \
502 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
503
504#undef __bitmask
505#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
506 __bitmask_size_in_longs(nr_bits))
507
091ad365
IM		 508#undef DECLARE_EVENT_CLASS
509#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
d0ee8f4a 510static inline notrace int trace_event_get_offsets_##call( \
62323a14 511 struct trace_event_data_offsets_##call *__data_offsets, proto) \
7fcb7c47
LZ		 512{ \
513 int __data_size = 0; \
114e7b52 514 int __maybe_unused __item_length; \
a7237765 515 struct trace_event_raw_##call __maybe_unused *entry; \
7fcb7c47
LZ		 516 \
517 tstruct; \
518 \
519 return __data_size; \
520}
521
ff038f5c
SR		 522#undef DEFINE_EVENT
523#define DEFINE_EVENT(template, name, proto, args)
524
e5bc9721
SR		 525#undef DEFINE_EVENT_PRINT
526#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
527 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
528
7fcb7c47
LZ		 529#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
530
46ac5182
SRRH		 531/*
532 * Stage 4 of the trace events.
533 *
534 * Override the macros in <trace/trace_events.h> to include the following:
535 *
536 * For those macros defined with TRACE_EVENT:
537 *
538 * static struct trace_event_call event_<call>;
539 *
540 * static void trace_event_raw_event_<call>(void *__data, proto)
541 * {
542 * struct trace_event_file *trace_file = __data;
543 * struct trace_event_call *event_call = trace_file->event_call;
544 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
545 * unsigned long eflags = trace_file->flags;
546 * enum event_trigger_type __tt = ETT_NONE;
547 * struct ring_buffer_event *event;
548 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
549 * struct ring_buffer *buffer;
550 * unsigned long irq_flags;
551 * int __data_size;
552 * int pc;
553 *
554 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
555 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
556 * event_triggers_call(trace_file, NULL);
557 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
558 * return;
559 * }
560 *
561 * local_save_flags(irq_flags);
562 * pc = preempt_count();
563 *
564 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
565 *
566 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
567 * event_<call>->event.type,
568 * sizeof(*entry) + __data_size,
569 * irq_flags, pc);
570 * if (!event)
571 * return;
572 * entry = ring_buffer_event_data(event);
573 *
574 * { <assign>; } <-- Here we assign the entries by the __field and
575 * __array macros.
576 *
577 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
578 * __tt = event_triggers_call(trace_file, entry);
579 *
580 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
581 * &trace_file->flags))
582 * ring_buffer_discard_commit(buffer, event);
583 * else if (!filter_check_discard(trace_file, entry, buffer, event))
584 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
585 *
586 * if (__tt)
587 * event_triggers_post_call(trace_file, __tt);
588 * }
589 *
590 * static struct trace_event ftrace_event_type_<call> = {
591 * .trace = trace_raw_output_<call>, <-- stage 2
592 * };
593 *
594 * static char print_fmt_<call>[] = <TP_printk>;
595 *
596 * static struct trace_event_class __used event_class_<template> = {
597 * .system = "<system>",
598 * .define_fields = trace_event_define_fields_<call>,
599 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
600 * .raw_init = trace_event_raw_init,
601 * .probe = trace_event_raw_event_##call,
602 * .reg = trace_event_reg,
603 * };
604 *
605 * static struct trace_event_call event_<call> = {
606 * .class = event_class_<template>,
607 * {
608 * .tp = &__tracepoint_<call>,
609 * },
610 * .event = &ftrace_event_type_<call>,
611 * .print_fmt = print_fmt_<call>,
612 * .flags = TRACE_EVENT_FL_TRACEPOINT,
613 * };
614 * // its only safe to use pointers when doing linker tricks to
615 * // create an array.
616 * static struct trace_event_call __used
617 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
618 *
619 */
620
621#ifdef CONFIG_PERF_EVENTS
622
623#define _TRACE_PERF_PROTO(call, proto) \
624 static notrace void \
625 perf_trace_##call(void *__data, proto);
626
627#define _TRACE_PERF_INIT(call) \
628 .perf_probe = perf_trace_##call,
629
630#else
631#define _TRACE_PERF_PROTO(call, proto)
632#define _TRACE_PERF_INIT(call)
633#endif /* CONFIG_PERF_EVENTS */
634
635#undef __entry
636#define __entry entry
637
638#undef __field
639#define __field(type, item)
640
641#undef __field_struct
642#define __field_struct(type, item)
643
644#undef __array
645#define __array(type, item, len)
646
647#undef __dynamic_array
648#define __dynamic_array(type, item, len) \
649 __entry->__data_loc_##item = __data_offsets.item;
650
651#undef __string
652#define __string(item, src) __dynamic_array(char, item, -1)
653
654#undef __assign_str
655#define __assign_str(dst, src) \
656 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
657
658#undef __bitmask
659#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
660
661#undef __get_bitmask
662#define __get_bitmask(field) (char *)__get_dynamic_array(field)
663
664#undef __assign_bitmask
665#define __assign_bitmask(dst, src, nr_bits) \
666 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
667
668#undef TP_fast_assign
669#define TP_fast_assign(args...) args
670
46ac5182
SRRH		 671#undef __perf_count
672#define __perf_count(c) (c)
673
674#undef __perf_task
675#define __perf_task(t) (t)
676
677#undef DECLARE_EVENT_CLASS
678#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
679 \
680static notrace void \
681trace_event_raw_event_##call(void *__data, proto) \
682{ \
683 struct trace_event_file *trace_file = __data; \
684 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
685 struct trace_event_buffer fbuffer; \
686 struct trace_event_raw_##call *entry; \
687 int __data_size; \
688 \
689 if (trace_trigger_soft_disabled(trace_file)) \
690 return; \
691 \
692 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
693 \
694 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
695 sizeof(*entry) + __data_size); \
696 \
697 if (!entry) \
698 return; \
699 \
700 tstruct \
701 \
702 { assign; } \
703 \
704 trace_event_buffer_commit(&fbuffer); \
705}
706/*
707 * The ftrace_test_probe is compiled out, it is only here as a build time check
708 * to make sure that if the tracepoint handling changes, the ftrace probe will
709 * fail to compile unless it too is updated.
710 */
711
712#undef DEFINE_EVENT
713#define DEFINE_EVENT(template, call, proto, args) \
714static inline void ftrace_test_probe_##call(void) \
715{ \
716 check_trace_callback_type_##call(trace_event_raw_event_##template); \
717}
718
719#undef DEFINE_EVENT_PRINT
720#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
721
722#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
723
724#undef __entry
725#define __entry REC
726
727#undef __print_flags
728#undef __print_symbolic
729#undef __print_hex
2acae0d5 730#undef __print_hex_str
46ac5182
SRRH		 731#undef __get_dynamic_array
732#undef __get_dynamic_array_len
733#undef __get_str
734#undef __get_bitmask
735#undef __print_array
736
737#undef TP_printk
738#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
739
740#undef DECLARE_EVENT_CLASS
741#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
742_TRACE_PERF_PROTO(call, PARAMS(proto)); \
743static char print_fmt_##call[] = print; \
744static struct trace_event_class __used __refdata event_class_##call = { \
745 .system = TRACE_SYSTEM_STRING, \
746 .define_fields = trace_event_define_fields_##call, \
747 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
748 .raw_init = trace_event_raw_init, \
749 .probe = trace_event_raw_event_##call, \
750 .reg = trace_event_reg, \
751 _TRACE_PERF_INIT(call) \
752};
753
754#undef DEFINE_EVENT
755#define DEFINE_EVENT(template, call, proto, args) \
756 \
757static struct trace_event_call __used event_##call = { \
758 .class = &event_class_##template, \
759 { \
760 .tp = &__tracepoint_##call, \
761 }, \
762 .event.funcs = &trace_event_type_funcs_##template, \
763 .print_fmt = print_fmt_##template, \
764 .flags = TRACE_EVENT_FL_TRACEPOINT, \
765}; \
766static struct trace_event_call __used \
767__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
768
769#undef DEFINE_EVENT_PRINT
770#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
771 \
772static char print_fmt_##call[] = print; \
773 \
774static struct trace_event_call __used event_##call = { \
775 .class = &event_class_##template, \
776 { \
777 .tp = &__tracepoint_##call, \
778 }, \
779 .event.funcs = &trace_event_type_funcs_##call, \
780 .print_fmt = print_fmt_##call, \
781 .flags = TRACE_EVENT_FL_TRACEPOINT, \
782}; \
783static struct trace_event_call __used \
784__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
785
786#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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