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tracing: add TRACE_EVENT_MAP
[deliverable/linux.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
b1dace68
JD		 68#undef TRACE_EVENT_MAP
69#define TRACE_EVENT_MAP(name, map, proto, args, tstruct, assign, print) \
70 DECLARE_EVENT_CLASS(map, \
71 PARAMS(proto), \
72 PARAMS(args), \
73 PARAMS(tstruct), \
74 PARAMS(assign), \
75 PARAMS(print)); \
76 DEFINE_EVENT_MAP(map, name, map, PARAMS(proto), PARAMS(args));
ff038f5c 77
7fcb7c47
LZ		 78#undef __field
79#define __field(type, item) type item;
80
43b51ead
LZ		 81#undef __field_ext
82#define __field_ext(type, item, filter_type) type item;
83
4d4c9cc8
SR		 84#undef __field_struct
85#define __field_struct(type, item) type item;
86
87#undef __field_struct_ext
88#define __field_struct_ext(type, item, filter_type) type item;
89
f42c85e7
SR		 90#undef __array
91#define __array(type, item, len) type item[len];
92
7fcb7c47 93#undef __dynamic_array
7d536cb3 94#define __dynamic_array(type, item, len) u32 __data_loc_##item;
f42c85e7 95
9cbf1176 96#undef __string
7fcb7c47 97#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 98
4449bf92
SRRH		 99#undef __bitmask
100#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
101
f42c85e7
SR		 102#undef TP_STRUCT__entry
103#define TP_STRUCT__entry(args...) args
104
091ad365
IM		 105#undef DECLARE_EVENT_CLASS
106#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
a7237765 107 struct trace_event_raw_##name { \
ff038f5c
SR		 108 struct trace_entry ent; \
109 tstruct \
110 char __data[0]; \
8f082018
SR		 111 }; \
112 \
2425bcb9 113 static struct trace_event_class event_class_##name;
8f082018 114
ff038f5c
SR		 115#undef DEFINE_EVENT
116#define DEFINE_EVENT(template, name, proto, args) \
2425bcb9 117 static struct trace_event_call __used \
86c38a31 118 __attribute__((__aligned__(4))) event_##name
f42c85e7 119
b1dace68
JD		 120#undef DEFINE_EVENT_MAP
121#define DEFINE_EVENT_MAP(template, name, map, proto, args) \
122 static struct trace_event_call __used \
123 __attribute__((__aligned__(4))) event_##map
124
f5abaa1b
SR		 125#undef DEFINE_EVENT_FN
126#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
127 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
128
e5bc9721
SR		 129#undef DEFINE_EVENT_PRINT
130#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
131 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
132
97419875
JS		 133/* Callbacks are meaningless to ftrace. */
134#undef TRACE_EVENT_FN
0dd7b747
FW		 135#define TRACE_EVENT_FN(name, proto, args, tstruct, \
136 assign, print, reg, unreg) \
819ce45a
FW		 137 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
138 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
2701121b
DK		 139
140#undef TRACE_EVENT_FN_COND
141#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
142 assign, print, reg, unreg) \
143 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
144 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
97419875 145
1ed0c597
FW		 146#undef TRACE_EVENT_FLAGS
147#define TRACE_EVENT_FLAGS(name, value) \
53cf810b 148 __TRACE_EVENT_FLAGS(name, value)
1ed0c597 149
d5b5f391
PZ		 150#undef TRACE_EVENT_PERF_PERM
151#define TRACE_EVENT_PERF_PERM(name, expr...) \
152 __TRACE_EVENT_PERF_PERM(name, expr)
153
f42c85e7
SR		 154#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
155
156/*
157 * Stage 2 of the trace events.
158 *
9cbf1176
FW		 159 * Include the following:
160 *
62323a14 161 * struct trace_event_data_offsets_<call> {
7d536cb3
LZ		 162 * u32 <item1>;
163 * u32 <item2>;
9cbf1176
FW		 164 * [...]
165 * };
166 *
7d536cb3 167 * The __dynamic_array() macro will create each u32 <item>, this is
7fcb7c47 168 * to keep the offset of each array from the beginning of the event.
7d536cb3 169 * The size of an array is also encoded, in the higher 16 bits of <item>.
9cbf1176
FW		 170 */
171
0c564a53
SRRH		 172#undef TRACE_DEFINE_ENUM
173#define TRACE_DEFINE_ENUM(a)
174
7fcb7c47 175#undef __field
43b51ead
LZ		 176#define __field(type, item)
177
178#undef __field_ext
179#define __field_ext(type, item, filter_type)
7fcb7c47 180
4d4c9cc8
SR		 181#undef __field_struct
182#define __field_struct(type, item)
183
184#undef __field_struct_ext
185#define __field_struct_ext(type, item, filter_type)
186
9cbf1176
FW		 187#undef __array
188#define __array(type, item, len)
189
7fcb7c47 190#undef __dynamic_array
7d536cb3 191#define __dynamic_array(type, item, len) u32 item;
9cbf1176
FW		 192
193#undef __string
7fcb7c47 194#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 195
4449bf92
SRRH		 196#undef __bitmask
197#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
198
091ad365
IM		 199#undef DECLARE_EVENT_CLASS
200#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
62323a14 201 struct trace_event_data_offsets_##call { \
9cbf1176
FW		 202 tstruct; \
203 };
204
ff038f5c
SR		 205#undef DEFINE_EVENT
206#define DEFINE_EVENT(template, name, proto, args)
207
b1dace68
JD		 208#undef DEFINE_EVENT_MAP
209#define DEFINE_EVENT_MAP(template, name, map, proto, args)
210
e5bc9721
SR		 211#undef DEFINE_EVENT_PRINT
212#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
213 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
214
1ed0c597
FW		 215#undef TRACE_EVENT_FLAGS
216#define TRACE_EVENT_FLAGS(event, flag)
217
d5b5f391
PZ		 218#undef TRACE_EVENT_PERF_PERM
219#define TRACE_EVENT_PERF_PERM(event, expr...)
220
9cbf1176
FW		 221#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
222
223/*
224 * Stage 3 of the trace events.
225 *
f42c85e7
SR		 226 * Override the macros in <trace/trace_events.h> to include the following:
227 *
228 * enum print_line_t
892c505a 229 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
f42c85e7
SR		 230 * {
231 * struct trace_seq *s = &iter->seq;
a7237765 232 * struct trace_event_raw_<call> *field; <-- defined in stage 1
f42c85e7 233 * struct trace_entry *entry;
bc289ae9 234 * struct trace_seq *p = &iter->tmp_seq;
f42c85e7
SR		 235 * int ret;
236 *
237 * entry = iter->ent;
238 *
32c0edae 239 * if (entry->type != event_<call>->event.type) {
f42c85e7
SR		 240 * WARN_ON_ONCE(1);
241 * return TRACE_TYPE_UNHANDLED;
242 * }
243 *
244 * field = (typeof(field))entry;
245 *
56d8bd3f 246 * trace_seq_init(p);
50354a8a
LZ		 247 * ret = trace_seq_printf(s, "%s: ", <call>);
248 * if (ret)
249 * ret = trace_seq_printf(s, <TP_printk> "\n");
f42c85e7
SR		 250 * if (!ret)
251 * return TRACE_TYPE_PARTIAL_LINE;
252 *
253 * return TRACE_TYPE_HANDLED;
254 * }
255 *
256 * This is the method used to print the raw event to the trace
257 * output format. Note, this is not needed if the data is read
258 * in binary.
259 */
260
261#undef __entry
262#define __entry field
263
264#undef TP_printk
265#define TP_printk(fmt, args...) fmt "\n", args
266
7fcb7c47
LZ		 267#undef __get_dynamic_array
268#define __get_dynamic_array(field) \
7d536cb3 269 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
7fcb7c47 270
beba4bb0
SRRH		 271#undef __get_dynamic_array_len
272#define __get_dynamic_array_len(field) \
273 ((__entry->__data_loc_##field >> 16) & 0xffff)
274
9cbf1176 275#undef __get_str
934de5f2 276#define __get_str(field) ((char *)__get_dynamic_array(field))
9cbf1176 277
4449bf92
SRRH		 278#undef __get_bitmask
279#define __get_bitmask(field) \
280 ({ \
281 void *__bitmask = __get_dynamic_array(field); \
282 unsigned int __bitmask_size; \
beba4bb0 283 __bitmask_size = __get_dynamic_array_len(field); \
645df987 284 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
4449bf92
SRRH		 285 })
286
be74b73a
SR		 287#undef __print_flags
288#define __print_flags(flag, delim, flag_array...) \
289 ({ \
a48f494e 290 static const struct trace_print_flags __flags[] = \
be74b73a 291 { flag_array, { -1, NULL }}; \
645df987 292 trace_print_flags_seq(p, delim, flag, __flags); \
be74b73a
SR		 293 })
294
0f4fc29d
SR		 295#undef __print_symbolic
296#define __print_symbolic(value, symbol_array...) \
297 ({ \
298 static const struct trace_print_flags symbols[] = \
299 { symbol_array, { -1, NULL }}; \
645df987 300 trace_print_symbols_seq(p, value, symbols); \
0f4fc29d
SR		 301 })
302
2fc1b6f0 303#undef __print_symbolic_u64
304#if BITS_PER_LONG == 32
305#define __print_symbolic_u64(value, symbol_array...) \
306 ({ \
307 static const struct trace_print_flags_u64 symbols[] = \
308 { symbol_array, { -1, NULL } }; \
645df987 309 trace_print_symbols_seq_u64(p, value, symbols); \
2fc1b6f0 310 })
311#else
312#define __print_symbolic_u64(value, symbol_array...) \
313 __print_symbolic(value, symbol_array)
314#endif
315
5a2e3995 316#undef __print_hex
645df987 317#define __print_hex(buf, buf_len) trace_print_hex_seq(p, buf, buf_len)
5a2e3995 318
6ea22486
DM		 319#undef __print_array
320#define __print_array(array, count, el_size) \
321 ({ \
322 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
323 el_size != 4 && el_size != 8); \
645df987 324 trace_print_array_seq(p, array, count, el_size); \
6ea22486
DM		 325 })
326
091ad365
IM		 327#undef DECLARE_EVENT_CLASS
328#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
83f0d539 329static notrace enum print_line_t \
892c505a
SRRH		 330trace_raw_output_##call(struct trace_iterator *iter, int flags, \
331 struct trace_event *trace_event) \
f42c85e7
SR		 332{ \
333 struct trace_seq *s = &iter->seq; \
f71130de 334 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
a7237765 335 struct trace_event_raw_##call *field; \
f42c85e7
SR		 336 int ret; \
337 \
f71130de 338 field = (typeof(field))iter->ent; \
80decc70 339 \
892c505a 340 ret = trace_raw_output_prep(iter, trace_event); \
8e2e095c 341 if (ret != TRACE_TYPE_HANDLED) \
f71130de
LZ		 342 return ret; \
343 \
19a7fe20 344 trace_seq_printf(s, print); \
f42c85e7 345 \
19a7fe20 346 return trace_handle_return(s); \
80decc70 347} \
3ad017ba 348static struct trace_event_functions trace_event_type_funcs_##call = { \
892c505a 349 .trace = trace_raw_output_##call, \
80decc70 350};
ff038f5c 351
e5bc9721
SR		 352#undef DEFINE_EVENT_PRINT
353#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
83f0d539 354static notrace enum print_line_t \
892c505a 355trace_raw_output_##call(struct trace_iterator *iter, int flags, \
a9a57763 356 struct trace_event *event) \
e5bc9721 357{ \
a7237765 358 struct trace_event_raw_##template *field; \
e5bc9721 359 struct trace_entry *entry; \
bc289ae9 360 struct trace_seq *p = &iter->tmp_seq; \
f42c85e7
SR		 361 \
362 entry = iter->ent; \
363 \
32c0edae 364 if (entry->type != event_##call.event.type) { \
f42c85e7
SR		 365 WARN_ON_ONCE(1); \
366 return TRACE_TYPE_UNHANDLED; \
367 } \
368 \
369 field = (typeof(field))entry; \
370 \
56d8bd3f 371 trace_seq_init(p); \
892c505a 372 return trace_output_call(iter, #call, print); \
80decc70 373} \
3ad017ba 374static struct trace_event_functions trace_event_type_funcs_##call = { \
892c505a 375 .trace = trace_raw_output_##call, \
80decc70 376};
e5bc9721 377
f42c85e7
SR		 378#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
379
43b51ead
LZ		 380#undef __field_ext
381#define __field_ext(type, item, filter_type) \
f42c85e7
SR		 382 ret = trace_define_field(event_call, #type, #item, \
383 offsetof(typeof(field), item), \
43b51ead
LZ		 384 sizeof(field.item), \
385 is_signed_type(type), filter_type); \
f42c85e7
SR		 386 if (ret) \
387 return ret;
388
4d4c9cc8
SR		 389#undef __field_struct_ext
390#define __field_struct_ext(type, item, filter_type) \
391 ret = trace_define_field(event_call, #type, #item, \
392 offsetof(typeof(field), item), \
393 sizeof(field.item), \
394 0, filter_type); \
395 if (ret) \
396 return ret;
397
43b51ead
LZ		 398#undef __field
399#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
400
4d4c9cc8
SR		 401#undef __field_struct
402#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
403
f42c85e7
SR		 404#undef __array
405#define __array(type, item, len) \
04295780 406 do { \
87291347 407 char *type_str = #type"["__stringify(len)"]"; \
04295780 408 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
87291347 409 ret = trace_define_field(event_call, type_str, #item, \
f42c85e7 410 offsetof(typeof(field), item), \
fb7ae981
LJ		 411 sizeof(field.item), \
412 is_signed_type(type), FILTER_OTHER); \
04295780
SR		 413 if (ret) \
414 return ret; \
415 } while (0);
f42c85e7 416
7fcb7c47
LZ		 417#undef __dynamic_array
418#define __dynamic_array(type, item, len) \
68fd60a8 419 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
43b51ead 420 offsetof(typeof(field), __data_loc_##item), \
fb7ae981
LJ		 421 sizeof(field.__data_loc_##item), \
422 is_signed_type(type), FILTER_OTHER);
7fcb7c47 423
9cbf1176 424#undef __string
7fcb7c47 425#define __string(item, src) __dynamic_array(char, item, -1)
9cbf1176 426
4449bf92
SRRH		 427#undef __bitmask
428#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
429
091ad365
IM		 430#undef DECLARE_EVENT_CLASS
431#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
7e4f44b1 432static int notrace __init \
33d0f35e 433trace_event_define_fields_##call(struct trace_event_call *event_call) \
f42c85e7 434{ \
a7237765 435 struct trace_event_raw_##call field; \
f42c85e7
SR		 436 int ret; \
437 \
f42c85e7
SR		 438 tstruct; \
439 \
440 return ret; \
441}
442
ff038f5c
SR		 443#undef DEFINE_EVENT
444#define DEFINE_EVENT(template, name, proto, args)
445
b1dace68
JD		 446#undef DEFINE_EVENT_MAP
447#define DEFINE_EVENT_MAP(template, name, map, proto, args)
448
e5bc9721
SR		 449#undef DEFINE_EVENT_PRINT
450#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
451 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
452
f42c85e7
SR		 453#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
454
7fcb7c47
LZ		 455/*
456 * remember the offset of each array from the beginning of the event.
457 */
458
459#undef __entry
460#define __entry entry
461
462#undef __field
463#define __field(type, item)
464
43b51ead
LZ		 465#undef __field_ext
466#define __field_ext(type, item, filter_type)
467
4d4c9cc8
SR		 468#undef __field_struct
469#define __field_struct(type, item)
470
471#undef __field_struct_ext
472#define __field_struct_ext(type, item, filter_type)
473
7fcb7c47
LZ		 474#undef __array
475#define __array(type, item, len)
476
477#undef __dynamic_array
478#define __dynamic_array(type, item, len) \
114e7b52 479 __item_length = (len) * sizeof(type); \
7fcb7c47
LZ		 480 __data_offsets->item = __data_size + \
481 offsetof(typeof(*entry), __data); \
114e7b52
FB		 482 __data_offsets->item |= __item_length << 16; \
483 __data_size += __item_length;
7fcb7c47
LZ		 484
485#undef __string
4e58e547
SRRH		 486#define __string(item, src) __dynamic_array(char, item, \
487 strlen((src) ? (const char *)(src) : "(null)") + 1)
7fcb7c47 488
4449bf92
SRRH		 489/*
490 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
491 * num_possible_cpus().
492 */
493#define __bitmask_size_in_bytes_raw(nr_bits) \
494 (((nr_bits) + 7) / 8)
495
496#define __bitmask_size_in_longs(nr_bits) \
497 ((__bitmask_size_in_bytes_raw(nr_bits) + \
498 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
499
500/*
501 * __bitmask_size_in_bytes is the number of bytes needed to hold
502 * num_possible_cpus() padded out to the nearest long. This is what
503 * is saved in the buffer, just to be consistent.
504 */
505#define __bitmask_size_in_bytes(nr_bits) \
506 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
507
508#undef __bitmask
509#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
510 __bitmask_size_in_longs(nr_bits))
511
091ad365
IM		 512#undef DECLARE_EVENT_CLASS
513#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
d0ee8f4a 514static inline notrace int trace_event_get_offsets_##call( \
62323a14 515 struct trace_event_data_offsets_##call *__data_offsets, proto) \
7fcb7c47
LZ		 516{ \
517 int __data_size = 0; \
114e7b52 518 int __maybe_unused __item_length; \
a7237765 519 struct trace_event_raw_##call __maybe_unused *entry; \
7fcb7c47
LZ		 520 \
521 tstruct; \
522 \
523 return __data_size; \
524}
525
ff038f5c
SR		 526#undef DEFINE_EVENT
527#define DEFINE_EVENT(template, name, proto, args)
528
b1dace68
JD		 529#undef DEFINE_EVENT_MAP
530#define DEFINE_EVENT_MAP(template, name, map, proto, args)
531
e5bc9721
SR		 532#undef DEFINE_EVENT_PRINT
533#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
534 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
535
7fcb7c47
LZ		 536#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
537
46ac5182
SRRH		 538/*
539 * Stage 4 of the trace events.
540 *
541 * Override the macros in <trace/trace_events.h> to include the following:
542 *
543 * For those macros defined with TRACE_EVENT:
544 *
545 * static struct trace_event_call event_<call>;
546 *
547 * static void trace_event_raw_event_<call>(void *__data, proto)
548 * {
549 * struct trace_event_file *trace_file = __data;
550 * struct trace_event_call *event_call = trace_file->event_call;
551 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
552 * unsigned long eflags = trace_file->flags;
553 * enum event_trigger_type __tt = ETT_NONE;
554 * struct ring_buffer_event *event;
555 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
556 * struct ring_buffer *buffer;
557 * unsigned long irq_flags;
558 * int __data_size;
559 * int pc;
560 *
561 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
562 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
563 * event_triggers_call(trace_file, NULL);
564 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
565 * return;
566 * }
567 *
568 * local_save_flags(irq_flags);
569 * pc = preempt_count();
570 *
571 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
572 *
573 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
574 * event_<call>->event.type,
575 * sizeof(*entry) + __data_size,
576 * irq_flags, pc);
577 * if (!event)
578 * return;
579 * entry = ring_buffer_event_data(event);
580 *
581 * { <assign>; } <-- Here we assign the entries by the __field and
582 * __array macros.
583 *
584 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
585 * __tt = event_triggers_call(trace_file, entry);
586 *
587 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
588 * &trace_file->flags))
589 * ring_buffer_discard_commit(buffer, event);
590 * else if (!filter_check_discard(trace_file, entry, buffer, event))
591 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
592 *
593 * if (__tt)
594 * event_triggers_post_call(trace_file, __tt);
595 * }
596 *
597 * static struct trace_event ftrace_event_type_<call> = {
598 * .trace = trace_raw_output_<call>, <-- stage 2
599 * };
600 *
601 * static char print_fmt_<call>[] = <TP_printk>;
602 *
603 * static struct trace_event_class __used event_class_<template> = {
604 * .system = "<system>",
605 * .define_fields = trace_event_define_fields_<call>,
606 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
607 * .raw_init = trace_event_raw_init,
608 * .probe = trace_event_raw_event_##call,
609 * .reg = trace_event_reg,
610 * };
611 *
612 * static struct trace_event_call event_<call> = {
613 * .class = event_class_<template>,
614 * {
615 * .tp = &__tracepoint_<call>,
616 * },
617 * .event = &ftrace_event_type_<call>,
618 * .print_fmt = print_fmt_<call>,
619 * .flags = TRACE_EVENT_FL_TRACEPOINT,
620 * };
621 * // its only safe to use pointers when doing linker tricks to
622 * // create an array.
623 * static struct trace_event_call __used
624 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
625 *
626 */
627
628#ifdef CONFIG_PERF_EVENTS
629
630#define _TRACE_PERF_PROTO(call, proto) \
631 static notrace void \
632 perf_trace_##call(void *__data, proto);
633
634#define _TRACE_PERF_INIT(call) \
635 .perf_probe = perf_trace_##call,
636
637#else
638#define _TRACE_PERF_PROTO(call, proto)
639#define _TRACE_PERF_INIT(call)
640#endif /* CONFIG_PERF_EVENTS */
641
642#undef __entry
643#define __entry entry
644
645#undef __field
646#define __field(type, item)
647
648#undef __field_struct
649#define __field_struct(type, item)
650
651#undef __array
652#define __array(type, item, len)
653
654#undef __dynamic_array
655#define __dynamic_array(type, item, len) \
656 __entry->__data_loc_##item = __data_offsets.item;
657
658#undef __string
659#define __string(item, src) __dynamic_array(char, item, -1)
660
661#undef __assign_str
662#define __assign_str(dst, src) \
663 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
664
665#undef __bitmask
666#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
667
668#undef __get_bitmask
669#define __get_bitmask(field) (char *)__get_dynamic_array(field)
670
671#undef __assign_bitmask
672#define __assign_bitmask(dst, src, nr_bits) \
673 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
674
675#undef TP_fast_assign
676#define TP_fast_assign(args...) args
677
46ac5182
SRRH		 678#undef __perf_count
679#define __perf_count(c) (c)
680
681#undef __perf_task
682#define __perf_task(t) (t)
683
684#undef DECLARE_EVENT_CLASS
685#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
686 \
687static notrace void \
688trace_event_raw_event_##call(void *__data, proto) \
689{ \
690 struct trace_event_file *trace_file = __data; \
691 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
692 struct trace_event_buffer fbuffer; \
693 struct trace_event_raw_##call *entry; \
694 int __data_size; \
695 \
696 if (trace_trigger_soft_disabled(trace_file)) \
697 return; \
698 \
699 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
700 \
701 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
702 sizeof(*entry) + __data_size); \
703 \
704 if (!entry) \
705 return; \
706 \
707 tstruct \
708 \
709 { assign; } \
710 \
711 trace_event_buffer_commit(&fbuffer); \
712}
713/*
714 * The ftrace_test_probe is compiled out, it is only here as a build time check
715 * to make sure that if the tracepoint handling changes, the ftrace probe will
716 * fail to compile unless it too is updated.
717 */
718
719#undef DEFINE_EVENT
720#define DEFINE_EVENT(template, call, proto, args) \
721static inline void ftrace_test_probe_##call(void) \
722{ \
723 check_trace_callback_type_##call(trace_event_raw_event_##template); \
724}
725
b1dace68
JD		 726#undef DEFINE_EVENT_MAP
727#define DEFINE_EVENT_MAP(template, call, map, proto, args) \
728static inline void ftrace_test_probe_##map(void) \
729{ \
730 check_trace_callback_type_##call(trace_event_raw_event_##template); \
731}
732
46ac5182
SRRH		 733#undef DEFINE_EVENT_PRINT
734#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
735
736#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
737
738#undef __entry
739#define __entry REC
740
741#undef __print_flags
742#undef __print_symbolic
743#undef __print_hex
744#undef __get_dynamic_array
745#undef __get_dynamic_array_len
746#undef __get_str
747#undef __get_bitmask
748#undef __print_array
749
750#undef TP_printk
751#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
752
753#undef DECLARE_EVENT_CLASS
754#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
755_TRACE_PERF_PROTO(call, PARAMS(proto)); \
756static char print_fmt_##call[] = print; \
757static struct trace_event_class __used __refdata event_class_##call = { \
758 .system = TRACE_SYSTEM_STRING, \
759 .define_fields = trace_event_define_fields_##call, \
760 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
761 .raw_init = trace_event_raw_init, \
762 .probe = trace_event_raw_event_##call, \
763 .reg = trace_event_reg, \
764 _TRACE_PERF_INIT(call) \
765};
766
767#undef DEFINE_EVENT
768#define DEFINE_EVENT(template, call, proto, args) \
769 \
770static struct trace_event_call __used event_##call = { \
771 .class = &event_class_##template, \
772 { \
773 .tp = &__tracepoint_##call, \
774 }, \
775 .event.funcs = &trace_event_type_funcs_##template, \
776 .print_fmt = print_fmt_##template, \
777 .flags = TRACE_EVENT_FL_TRACEPOINT, \
778}; \
779static struct trace_event_call __used \
780__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
781
b1dace68
JD		 782#undef DEFINE_EVENT_MAP
783#define DEFINE_EVENT_MAP(_template, _call, _map, _proto, _args) \
784 \
785static struct trace_event_map event_map_##_map = { \
786 .tp = &__tracepoint_##_call, \
787 .name = #_map, \
788}; \
789 \
790static struct trace_event_call __used event_##_map = { \
791 .class = &event_class_##_template, \
792 { \
793 .map = &event_map_##_map, \
794 }, \
795 .event.funcs = &trace_event_type_funcs_##_template, \
796 .print_fmt = print_fmt_##_template, \
797 .flags = TRACE_EVENT_FL_TRACEPOINT | TRACE_EVENT_FL_MAP,\
798}; \
799static struct trace_event_call __used \
800__attribute__((section("_ftrace_events"))) *__event_##_map = &event_##_map
801
46ac5182
SRRH		 802#undef DEFINE_EVENT_PRINT
803#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
804 \
805static char print_fmt_##call[] = print; \
806 \
807static struct trace_event_call __used event_##call = { \
808 .class = &event_class_##template, \
809 { \
810 .tp = &__tracepoint_##call, \
811 }, \
812 .event.funcs = &trace_event_type_funcs_##call, \
813 .print_fmt = print_fmt_##call, \
814 .flags = TRACE_EVENT_FL_TRACEPOINT, \
815}; \
816static struct trace_event_call __used \
817__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
818
819#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
Linux kernel - Deliverables
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