Commit | Line | Data |
---|---|---|
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 | * | |
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 | ||
7fcb7c47 LZ |
21 | #undef __field |
22 | #define __field(type, item) type item; | |
23 | ||
f42c85e7 SR |
24 | #undef __array |
25 | #define __array(type, item, len) type item[len]; | |
26 | ||
7fcb7c47 LZ |
27 | #undef __dynamic_array |
28 | #define __dynamic_array(type, item, len) unsigned short __data_loc_##item; | |
f42c85e7 | 29 | |
9cbf1176 | 30 | #undef __string |
7fcb7c47 | 31 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 32 | |
f42c85e7 SR |
33 | #undef TP_STRUCT__entry |
34 | #define TP_STRUCT__entry(args...) args | |
35 | ||
36 | #undef TRACE_EVENT | |
37 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
38 | struct ftrace_raw_##name { \ | |
39 | struct trace_entry ent; \ | |
40 | tstruct \ | |
7fcb7c47 | 41 | char __data[0]; \ |
f42c85e7 SR |
42 | }; \ |
43 | static struct ftrace_event_call event_##name | |
44 | ||
45 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
46 | ||
9cbf1176 | 47 | |
f42c85e7 SR |
48 | /* |
49 | * Stage 2 of the trace events. | |
50 | * | |
9cbf1176 FW |
51 | * Include the following: |
52 | * | |
7fcb7c47 LZ |
53 | * struct ftrace_data_offsets_<call> { |
54 | * int <item1>; | |
55 | * int <item2>; | |
9cbf1176 FW |
56 | * [...] |
57 | * }; | |
58 | * | |
7fcb7c47 LZ |
59 | * The __dynamic_array() macro will create each int <item>, this is |
60 | * to keep the offset of each array from the beginning of the event. | |
9cbf1176 FW |
61 | */ |
62 | ||
7fcb7c47 LZ |
63 | #undef __field |
64 | #define __field(type, item); | |
65 | ||
9cbf1176 FW |
66 | #undef __array |
67 | #define __array(type, item, len) | |
68 | ||
7fcb7c47 LZ |
69 | #undef __dynamic_array |
70 | #define __dynamic_array(type, item, len) int item; | |
9cbf1176 FW |
71 | |
72 | #undef __string | |
7fcb7c47 | 73 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 FW |
74 | |
75 | #undef TRACE_EVENT | |
76 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 77 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
78 | tstruct; \ |
79 | }; | |
80 | ||
81 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
82 | ||
6ff9a64d SR |
83 | /* |
84 | * Setup the showing format of trace point. | |
85 | * | |
86 | * int | |
87 | * ftrace_format_##call(struct trace_seq *s) | |
88 | * { | |
89 | * struct ftrace_raw_##call field; | |
90 | * int ret; | |
91 | * | |
92 | * ret = trace_seq_printf(s, #type " " #item ";" | |
93 | * " offset:%u; size:%u;\n", | |
94 | * offsetof(struct ftrace_raw_##call, item), | |
95 | * sizeof(field.type)); | |
96 | * | |
97 | * } | |
98 | */ | |
99 | ||
100 | #undef TP_STRUCT__entry | |
101 | #define TP_STRUCT__entry(args...) args | |
102 | ||
103 | #undef __field | |
104 | #define __field(type, item) \ | |
105 | ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ | |
106 | "offset:%u;\tsize:%u;\n", \ | |
107 | (unsigned int)offsetof(typeof(field), item), \ | |
108 | (unsigned int)sizeof(field.item)); \ | |
109 | if (!ret) \ | |
110 | return 0; | |
111 | ||
112 | #undef __array | |
113 | #define __array(type, item, len) \ | |
114 | ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ | |
115 | "offset:%u;\tsize:%u;\n", \ | |
116 | (unsigned int)offsetof(typeof(field), item), \ | |
117 | (unsigned int)sizeof(field.item)); \ | |
118 | if (!ret) \ | |
119 | return 0; | |
120 | ||
121 | #undef __dynamic_array | |
122 | #define __dynamic_array(type, item, len) \ | |
123 | ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t" \ | |
124 | "offset:%u;\tsize:%u;\n", \ | |
125 | (unsigned int)offsetof(typeof(field), \ | |
126 | __data_loc_##item), \ | |
127 | (unsigned int)sizeof(field.__data_loc_##item)); \ | |
128 | if (!ret) \ | |
129 | return 0; | |
130 | ||
131 | #undef __string | |
132 | #define __string(item, src) __dynamic_array(char, item, -1) | |
133 | ||
134 | #undef __entry | |
135 | #define __entry REC | |
136 | ||
137 | #undef __print_symbolic | |
138 | #undef __get_dynamic_array | |
139 | #undef __get_str | |
140 | ||
141 | #undef TP_printk | |
142 | #define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) | |
143 | ||
144 | #undef TP_fast_assign | |
145 | #define TP_fast_assign(args...) args | |
146 | ||
3a659305 PZ |
147 | #undef TP_perf_assign |
148 | #define TP_perf_assign(args...) | |
149 | ||
6ff9a64d SR |
150 | #undef TRACE_EVENT |
151 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
152 | static int \ | |
153 | ftrace_format_##call(struct trace_seq *s) \ | |
154 | { \ | |
155 | struct ftrace_raw_##call field __attribute__((unused)); \ | |
156 | int ret = 0; \ | |
157 | \ | |
158 | tstruct; \ | |
159 | \ | |
160 | trace_seq_printf(s, "\nprint fmt: " print); \ | |
161 | \ | |
162 | return ret; \ | |
163 | } | |
164 | ||
165 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
166 | ||
9cbf1176 FW |
167 | /* |
168 | * Stage 3 of the trace events. | |
169 | * | |
f42c85e7 SR |
170 | * Override the macros in <trace/trace_events.h> to include the following: |
171 | * | |
172 | * enum print_line_t | |
173 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
174 | * { | |
175 | * struct trace_seq *s = &iter->seq; | |
176 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
177 | * struct trace_entry *entry; | |
be74b73a | 178 | * struct trace_seq *p; |
f42c85e7 SR |
179 | * int ret; |
180 | * | |
181 | * entry = iter->ent; | |
182 | * | |
183 | * if (entry->type != event_<call>.id) { | |
184 | * WARN_ON_ONCE(1); | |
185 | * return TRACE_TYPE_UNHANDLED; | |
186 | * } | |
187 | * | |
188 | * field = (typeof(field))entry; | |
189 | * | |
be74b73a | 190 | * p = get_cpu_var(ftrace_event_seq); |
56d8bd3f | 191 | * trace_seq_init(p); |
f42c85e7 | 192 | * ret = trace_seq_printf(s, <TP_printk> "\n"); |
be74b73a | 193 | * put_cpu(); |
f42c85e7 SR |
194 | * if (!ret) |
195 | * return TRACE_TYPE_PARTIAL_LINE; | |
196 | * | |
197 | * return TRACE_TYPE_HANDLED; | |
198 | * } | |
199 | * | |
200 | * This is the method used to print the raw event to the trace | |
201 | * output format. Note, this is not needed if the data is read | |
202 | * in binary. | |
203 | */ | |
204 | ||
205 | #undef __entry | |
206 | #define __entry field | |
207 | ||
208 | #undef TP_printk | |
209 | #define TP_printk(fmt, args...) fmt "\n", args | |
210 | ||
7fcb7c47 LZ |
211 | #undef __get_dynamic_array |
212 | #define __get_dynamic_array(field) \ | |
213 | ((void *)__entry + __entry->__data_loc_##field) | |
214 | ||
9cbf1176 | 215 | #undef __get_str |
7fcb7c47 | 216 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 217 | |
be74b73a SR |
218 | #undef __print_flags |
219 | #define __print_flags(flag, delim, flag_array...) \ | |
220 | ({ \ | |
221 | static const struct trace_print_flags flags[] = \ | |
222 | { flag_array, { -1, NULL }}; \ | |
223 | ftrace_print_flags_seq(p, delim, flag, flags); \ | |
224 | }) | |
225 | ||
0f4fc29d SR |
226 | #undef __print_symbolic |
227 | #define __print_symbolic(value, symbol_array...) \ | |
228 | ({ \ | |
229 | static const struct trace_print_flags symbols[] = \ | |
230 | { symbol_array, { -1, NULL }}; \ | |
231 | ftrace_print_symbols_seq(p, value, symbols); \ | |
232 | }) | |
233 | ||
f42c85e7 SR |
234 | #undef TRACE_EVENT |
235 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
236 | enum print_line_t \ | |
237 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ | |
238 | { \ | |
239 | struct trace_seq *s = &iter->seq; \ | |
240 | struct ftrace_raw_##call *field; \ | |
241 | struct trace_entry *entry; \ | |
be74b73a | 242 | struct trace_seq *p; \ |
f42c85e7 SR |
243 | int ret; \ |
244 | \ | |
245 | entry = iter->ent; \ | |
246 | \ | |
247 | if (entry->type != event_##call.id) { \ | |
248 | WARN_ON_ONCE(1); \ | |
249 | return TRACE_TYPE_UNHANDLED; \ | |
250 | } \ | |
251 | \ | |
252 | field = (typeof(field))entry; \ | |
253 | \ | |
be74b73a | 254 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 255 | trace_seq_init(p); \ |
f42c85e7 | 256 | ret = trace_seq_printf(s, #call ": " print); \ |
be74b73a | 257 | put_cpu(); \ |
f42c85e7 SR |
258 | if (!ret) \ |
259 | return TRACE_TYPE_PARTIAL_LINE; \ | |
260 | \ | |
261 | return TRACE_TYPE_HANDLED; \ | |
262 | } | |
263 | ||
264 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
265 | ||
f42c85e7 SR |
266 | #undef __field |
267 | #define __field(type, item) \ | |
268 | ret = trace_define_field(event_call, #type, #item, \ | |
269 | offsetof(typeof(field), item), \ | |
a118e4d1 | 270 | sizeof(field.item), is_signed_type(type)); \ |
f42c85e7 SR |
271 | if (ret) \ |
272 | return ret; | |
273 | ||
274 | #undef __array | |
275 | #define __array(type, item, len) \ | |
276 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
277 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
278 | offsetof(typeof(field), item), \ | |
a118e4d1 | 279 | sizeof(field.item), 0); \ |
f42c85e7 SR |
280 | if (ret) \ |
281 | return ret; | |
282 | ||
7fcb7c47 LZ |
283 | #undef __dynamic_array |
284 | #define __dynamic_array(type, item, len) \ | |
285 | ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\ | |
286 | offsetof(typeof(field), __data_loc_##item), \ | |
287 | sizeof(field.__data_loc_##item), 0); | |
288 | ||
9cbf1176 | 289 | #undef __string |
7fcb7c47 | 290 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 291 | |
f42c85e7 SR |
292 | #undef TRACE_EVENT |
293 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
294 | int \ | |
295 | ftrace_define_fields_##call(void) \ | |
296 | { \ | |
297 | struct ftrace_raw_##call field; \ | |
298 | struct ftrace_event_call *event_call = &event_##call; \ | |
299 | int ret; \ | |
300 | \ | |
a118e4d1 TZ |
301 | __common_field(int, type, 1); \ |
302 | __common_field(unsigned char, flags, 0); \ | |
303 | __common_field(unsigned char, preempt_count, 0); \ | |
304 | __common_field(int, pid, 1); \ | |
305 | __common_field(int, tgid, 1); \ | |
f42c85e7 SR |
306 | \ |
307 | tstruct; \ | |
308 | \ | |
309 | return ret; \ | |
310 | } | |
311 | ||
312 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
313 | ||
7fcb7c47 LZ |
314 | /* |
315 | * remember the offset of each array from the beginning of the event. | |
316 | */ | |
317 | ||
318 | #undef __entry | |
319 | #define __entry entry | |
320 | ||
321 | #undef __field | |
322 | #define __field(type, item) | |
323 | ||
324 | #undef __array | |
325 | #define __array(type, item, len) | |
326 | ||
327 | #undef __dynamic_array | |
328 | #define __dynamic_array(type, item, len) \ | |
329 | __data_offsets->item = __data_size + \ | |
330 | offsetof(typeof(*entry), __data); \ | |
331 | __data_size += (len) * sizeof(type); | |
332 | ||
333 | #undef __string | |
334 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) \ | |
335 | ||
336 | #undef TRACE_EVENT | |
337 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
338 | static inline int ftrace_get_offsets_##call( \ | |
339 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ | |
340 | { \ | |
341 | int __data_size = 0; \ | |
342 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
343 | \ | |
344 | tstruct; \ | |
345 | \ | |
346 | return __data_size; \ | |
347 | } | |
348 | ||
349 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
350 | ||
3a659305 PZ |
351 | #ifdef CONFIG_EVENT_PROFILE |
352 | ||
353 | /* | |
354 | * Generate the functions needed for tracepoint perf_counter support. | |
355 | * | |
f413cdb8 | 356 | * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
3a659305 PZ |
357 | * |
358 | * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call) | |
359 | * { | |
360 | * int ret = 0; | |
361 | * | |
362 | * if (!atomic_inc_return(&event_call->profile_count)) | |
363 | * ret = register_trace_<call>(ftrace_profile_<call>); | |
364 | * | |
365 | * return ret; | |
366 | * } | |
367 | * | |
368 | * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call) | |
369 | * { | |
370 | * if (atomic_add_negative(-1, &event->call->profile_count)) | |
371 | * unregister_trace_<call>(ftrace_profile_<call>); | |
372 | * } | |
373 | * | |
374 | */ | |
375 | ||
3a659305 PZ |
376 | #undef TRACE_EVENT |
377 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
378 | \ | |
f413cdb8 | 379 | static void ftrace_profile_##call(proto); \ |
3a659305 PZ |
380 | \ |
381 | static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ | |
382 | { \ | |
383 | int ret = 0; \ | |
384 | \ | |
385 | if (!atomic_inc_return(&event_call->profile_count)) \ | |
386 | ret = register_trace_##call(ftrace_profile_##call); \ | |
387 | \ | |
388 | return ret; \ | |
389 | } \ | |
390 | \ | |
391 | static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ | |
392 | { \ | |
393 | if (atomic_add_negative(-1, &event_call->profile_count)) \ | |
394 | unregister_trace_##call(ftrace_profile_##call); \ | |
395 | } | |
396 | ||
397 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
398 | ||
3a659305 PZ |
399 | #endif |
400 | ||
c32e827b | 401 | /* |
9cbf1176 | 402 | * Stage 4 of the trace events. |
c32e827b | 403 | * |
ea20d929 | 404 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b SR |
405 | * |
406 | * static void ftrace_event_<call>(proto) | |
407 | * { | |
ef18012b | 408 | * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
c32e827b SR |
409 | * } |
410 | * | |
411 | * static int ftrace_reg_event_<call>(void) | |
412 | * { | |
ef18012b | 413 | * int ret; |
c32e827b | 414 | * |
ef18012b SR |
415 | * ret = register_trace_<call>(ftrace_event_<call>); |
416 | * if (!ret) | |
417 | * pr_info("event trace: Could not activate trace point " | |
418 | * "probe to <call>"); | |
419 | * return ret; | |
c32e827b SR |
420 | * } |
421 | * | |
422 | * static void ftrace_unreg_event_<call>(void) | |
423 | * { | |
ef18012b | 424 | * unregister_trace_<call>(ftrace_event_<call>); |
c32e827b SR |
425 | * } |
426 | * | |
c32e827b | 427 | * |
157587d7 | 428 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
429 | * |
430 | * static struct ftrace_event_call event_<call>; | |
431 | * | |
432 | * static void ftrace_raw_event_<call>(proto) | |
433 | * { | |
ef18012b SR |
434 | * struct ring_buffer_event *event; |
435 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
436 | * unsigned long irq_flags; | |
437 | * int pc; | |
438 | * | |
439 | * local_save_flags(irq_flags); | |
440 | * pc = preempt_count(); | |
441 | * | |
442 | * event = trace_current_buffer_lock_reserve(event_<call>.id, | |
443 | * sizeof(struct ftrace_raw_<call>), | |
444 | * irq_flags, pc); | |
445 | * if (!event) | |
446 | * return; | |
447 | * entry = ring_buffer_event_data(event); | |
448 | * | |
449 | * <assign>; <-- Here we assign the entries by the __field and | |
0e3d0f05 | 450 | * __array macros. |
c32e827b | 451 | * |
ef18012b | 452 | * trace_current_buffer_unlock_commit(event, irq_flags, pc); |
c32e827b SR |
453 | * } |
454 | * | |
455 | * static int ftrace_raw_reg_event_<call>(void) | |
456 | * { | |
ef18012b | 457 | * int ret; |
c32e827b | 458 | * |
ef18012b SR |
459 | * ret = register_trace_<call>(ftrace_raw_event_<call>); |
460 | * if (!ret) | |
461 | * pr_info("event trace: Could not activate trace point " | |
462 | * "probe to <call>"); | |
463 | * return ret; | |
c32e827b SR |
464 | * } |
465 | * | |
466 | * static void ftrace_unreg_event_<call>(void) | |
467 | * { | |
ef18012b | 468 | * unregister_trace_<call>(ftrace_raw_event_<call>); |
c32e827b SR |
469 | * } |
470 | * | |
471 | * static struct trace_event ftrace_event_type_<call> = { | |
ef18012b | 472 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
473 | * }; |
474 | * | |
475 | * static int ftrace_raw_init_event_<call>(void) | |
476 | * { | |
ef18012b | 477 | * int id; |
c32e827b | 478 | * |
ef18012b SR |
479 | * id = register_ftrace_event(&ftrace_event_type_<call>); |
480 | * if (!id) | |
481 | * return -ENODEV; | |
482 | * event_<call>.id = id; | |
483 | * return 0; | |
c32e827b SR |
484 | * } |
485 | * | |
486 | * static struct ftrace_event_call __used | |
487 | * __attribute__((__aligned__(4))) | |
488 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 489 | * .name = "<call>", |
0e3d0f05 | 490 | * .system = "<system>", |
ef18012b SR |
491 | * .raw_init = ftrace_raw_init_event_<call>, |
492 | * .regfunc = ftrace_reg_event_<call>, | |
493 | * .unregfunc = ftrace_unreg_event_<call>, | |
981d081e | 494 | * .show_format = ftrace_format_<call>, |
c32e827b SR |
495 | * } |
496 | * | |
497 | */ | |
498 | ||
2939b046 SR |
499 | #undef TP_FMT |
500 | #define TP_FMT(fmt, args...) fmt "\n", ##args | |
c32e827b | 501 | |
ac199db0 | 502 | #ifdef CONFIG_EVENT_PROFILE |
ac199db0 PZ |
503 | |
504 | #define _TRACE_PROFILE_INIT(call) \ | |
505 | .profile_count = ATOMIC_INIT(-1), \ | |
506 | .profile_enable = ftrace_profile_enable_##call, \ | |
507 | .profile_disable = ftrace_profile_disable_##call, | |
508 | ||
509 | #else | |
ac199db0 PZ |
510 | #define _TRACE_PROFILE_INIT(call) |
511 | #endif | |
512 | ||
da4d0302 SR |
513 | #undef __entry |
514 | #define __entry entry | |
d20e3b03 | 515 | |
9cbf1176 FW |
516 | #undef __field |
517 | #define __field(type, item) | |
518 | ||
519 | #undef __array | |
520 | #define __array(type, item, len) | |
521 | ||
7fcb7c47 LZ |
522 | #undef __dynamic_array |
523 | #define __dynamic_array(type, item, len) \ | |
524 | __entry->__data_loc_##item = __data_offsets.item; | |
525 | ||
9cbf1176 | 526 | #undef __string |
7fcb7c47 | 527 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
528 | |
529 | #undef __assign_str | |
530 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
531 | strcpy(__get_str(dst), src); |
532 | ||
da4d0302 | 533 | #undef TRACE_EVENT |
30a8fecc | 534 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
c32e827b SR |
535 | \ |
536 | static struct ftrace_event_call event_##call; \ | |
537 | \ | |
538 | static void ftrace_raw_event_##call(proto) \ | |
539 | { \ | |
7fcb7c47 | 540 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f2aebaee | 541 | struct ftrace_event_call *event_call = &event_##call; \ |
c32e827b SR |
542 | struct ring_buffer_event *event; \ |
543 | struct ftrace_raw_##call *entry; \ | |
544 | unsigned long irq_flags; \ | |
7fcb7c47 | 545 | int __data_size; \ |
c32e827b SR |
546 | int pc; \ |
547 | \ | |
548 | local_save_flags(irq_flags); \ | |
549 | pc = preempt_count(); \ | |
550 | \ | |
7fcb7c47 | 551 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 552 | \ |
c32e827b | 553 | event = trace_current_buffer_lock_reserve(event_##call.id, \ |
7fcb7c47 | 554 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 555 | irq_flags, pc); \ |
c32e827b SR |
556 | if (!event) \ |
557 | return; \ | |
558 | entry = ring_buffer_event_data(event); \ | |
559 | \ | |
7fcb7c47 LZ |
560 | \ |
561 | tstruct \ | |
562 | \ | |
a9c1c3ab | 563 | { assign; } \ |
c32e827b | 564 | \ |
f2aebaee | 565 | if (!filter_current_check_discard(event_call, entry, event)) \ |
77d9f465 | 566 | trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ |
c32e827b SR |
567 | } \ |
568 | \ | |
569 | static int ftrace_raw_reg_event_##call(void) \ | |
570 | { \ | |
571 | int ret; \ | |
572 | \ | |
573 | ret = register_trace_##call(ftrace_raw_event_##call); \ | |
633ddaa7 | 574 | if (ret) \ |
c32e827b | 575 | pr_info("event trace: Could not activate trace point " \ |
633ddaa7 | 576 | "probe to " #call "\n"); \ |
c32e827b SR |
577 | return ret; \ |
578 | } \ | |
579 | \ | |
580 | static void ftrace_raw_unreg_event_##call(void) \ | |
581 | { \ | |
582 | unregister_trace_##call(ftrace_raw_event_##call); \ | |
583 | } \ | |
584 | \ | |
585 | static struct trace_event ftrace_event_type_##call = { \ | |
586 | .trace = ftrace_raw_output_##call, \ | |
587 | }; \ | |
588 | \ | |
589 | static int ftrace_raw_init_event_##call(void) \ | |
590 | { \ | |
591 | int id; \ | |
592 | \ | |
593 | id = register_ftrace_event(&ftrace_event_type_##call); \ | |
594 | if (!id) \ | |
595 | return -ENODEV; \ | |
596 | event_##call.id = id; \ | |
cf027f64 | 597 | INIT_LIST_HEAD(&event_##call.fields); \ |
0a19e53c | 598 | init_preds(&event_##call); \ |
c32e827b SR |
599 | return 0; \ |
600 | } \ | |
601 | \ | |
602 | static struct ftrace_event_call __used \ | |
603 | __attribute__((__aligned__(4))) \ | |
604 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 605 | .name = #call, \ |
9cc26a26 | 606 | .system = __stringify(TRACE_SYSTEM), \ |
6d723736 | 607 | .event = &ftrace_event_type_##call, \ |
c32e827b | 608 | .raw_init = ftrace_raw_init_event_##call, \ |
da4d0302 SR |
609 | .regfunc = ftrace_raw_reg_event_##call, \ |
610 | .unregfunc = ftrace_raw_unreg_event_##call, \ | |
981d081e | 611 | .show_format = ftrace_format_##call, \ |
cf027f64 | 612 | .define_fields = ftrace_define_fields_##call, \ |
ac199db0 | 613 | _TRACE_PROFILE_INIT(call) \ |
c32e827b | 614 | } |
ac199db0 | 615 | |
f42c85e7 | 616 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 617 | |
f413cdb8 FW |
618 | /* |
619 | * Define the insertion callback to profile events | |
620 | * | |
621 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
622 | * insert in the ring buffer but in a perf counter. | |
623 | * | |
624 | * static void ftrace_profile_<call>(proto) | |
625 | * { | |
626 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
627 | * struct ftrace_event_call *event_call = &event_<call>; | |
628 | * extern void perf_tpcounter_event(int, u64, u64, void *, int); | |
629 | * struct ftrace_raw_##call *entry; | |
630 | * u64 __addr = 0, __count = 1; | |
631 | * unsigned long irq_flags; | |
632 | * int __entry_size; | |
633 | * int __data_size; | |
634 | * int pc; | |
635 | * | |
636 | * local_save_flags(irq_flags); | |
637 | * pc = preempt_count(); | |
638 | * | |
639 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
640 | * __entry_size = __data_size + sizeof(*entry); | |
641 | * | |
642 | * do { | |
643 | * char raw_data[__entry_size]; <- allocate our sample in the stack | |
644 | * struct trace_entry *ent; | |
645 | * | |
646 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
647 | * ent = &entry->ent; | |
648 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
649 | * ent->type = event_call->id; | |
650 | * | |
651 | * <tstruct> <- do some jobs with dynamic arrays | |
652 | * | |
653 | * <assign> <- affect our values | |
654 | * | |
655 | * perf_tpcounter_event(event_call->id, __addr, __count, entry, | |
656 | * __entry_size); <- submit them to perf counter | |
657 | * } while (0); | |
658 | * | |
659 | * } | |
660 | */ | |
661 | ||
662 | #ifdef CONFIG_EVENT_PROFILE | |
663 | ||
664 | #undef __perf_addr | |
665 | #define __perf_addr(a) __addr = (a) | |
666 | ||
667 | #undef __perf_count | |
668 | #define __perf_count(c) __count = (c) | |
669 | ||
670 | #undef TRACE_EVENT | |
671 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
672 | static void ftrace_profile_##call(proto) \ | |
673 | { \ | |
674 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
675 | struct ftrace_event_call *event_call = &event_##call; \ | |
676 | extern void perf_tpcounter_event(int, u64, u64, void *, int); \ | |
677 | struct ftrace_raw_##call *entry; \ | |
678 | u64 __addr = 0, __count = 1; \ | |
679 | unsigned long irq_flags; \ | |
680 | int __entry_size; \ | |
681 | int __data_size; \ | |
682 | int pc; \ | |
683 | \ | |
684 | local_save_flags(irq_flags); \ | |
685 | pc = preempt_count(); \ | |
686 | \ | |
687 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
688 | __entry_size = ALIGN(__data_size + sizeof(*entry), sizeof(u64));\ | |
689 | \ | |
690 | do { \ | |
691 | char raw_data[__entry_size]; \ | |
692 | struct trace_entry *ent; \ | |
693 | \ | |
694 | entry = (struct ftrace_raw_##call *)raw_data; \ | |
695 | ent = &entry->ent; \ | |
696 | tracing_generic_entry_update(ent, irq_flags, pc); \ | |
697 | ent->type = event_call->id; \ | |
698 | \ | |
699 | tstruct \ | |
700 | \ | |
701 | { assign; } \ | |
702 | \ | |
703 | perf_tpcounter_event(event_call->id, __addr, __count, entry,\ | |
704 | __entry_size); \ | |
705 | } while (0); \ | |
706 | \ | |
707 | } | |
708 | ||
709 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
710 | #endif /* CONFIG_EVENT_PROFILE */ | |
711 | ||
ac199db0 PZ |
712 | #undef _TRACE_PROFILE_INIT |
713 |