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Commit | Line | Data |
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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 | ||
43b51ead LZ |
24 | #undef __field_ext |
25 | #define __field_ext(type, item, filter_type) type item; | |
26 | ||
f42c85e7 SR |
27 | #undef __array |
28 | #define __array(type, item, len) type item[len]; | |
29 | ||
7fcb7c47 | 30 | #undef __dynamic_array |
7d536cb3 | 31 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
f42c85e7 | 32 | |
9cbf1176 | 33 | #undef __string |
7fcb7c47 | 34 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 35 | |
f42c85e7 SR |
36 | #undef TP_STRUCT__entry |
37 | #define TP_STRUCT__entry(args...) args | |
38 | ||
39 | #undef TRACE_EVENT | |
40 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
41 | struct ftrace_raw_##name { \ | |
42 | struct trace_entry ent; \ | |
43 | tstruct \ | |
7fcb7c47 | 44 | char __data[0]; \ |
f42c85e7 SR |
45 | }; \ |
46 | static struct ftrace_event_call event_##name | |
47 | ||
97419875 JS |
48 | /* Callbacks are meaningless to ftrace. */ |
49 | #undef TRACE_EVENT_FN | |
50 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
51 | assign, print, reg, unreg) \ | |
52 | TRACE_EVENT(name, TP_PROTO(proto), TP_ARGS(args), \ | |
53 | TP_STRUCT__entry(tstruct), \ | |
54 | TP_fast_assign(assign), \ | |
55 | TP_printk(print)) | |
56 | ||
f42c85e7 SR |
57 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
58 | ||
9cbf1176 | 59 | |
f42c85e7 SR |
60 | /* |
61 | * Stage 2 of the trace events. | |
62 | * | |
9cbf1176 FW |
63 | * Include the following: |
64 | * | |
7fcb7c47 | 65 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
66 | * u32 <item1>; |
67 | * u32 <item2>; | |
9cbf1176 FW |
68 | * [...] |
69 | * }; | |
70 | * | |
7d536cb3 | 71 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 72 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 73 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
74 | */ |
75 | ||
7fcb7c47 | 76 | #undef __field |
43b51ead LZ |
77 | #define __field(type, item) |
78 | ||
79 | #undef __field_ext | |
80 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 81 | |
9cbf1176 FW |
82 | #undef __array |
83 | #define __array(type, item, len) | |
84 | ||
7fcb7c47 | 85 | #undef __dynamic_array |
7d536cb3 | 86 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
87 | |
88 | #undef __string | |
7fcb7c47 | 89 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 FW |
90 | |
91 | #undef TRACE_EVENT | |
92 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 93 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
94 | tstruct; \ |
95 | }; | |
96 | ||
97 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
98 | ||
6ff9a64d SR |
99 | /* |
100 | * Setup the showing format of trace point. | |
101 | * | |
102 | * int | |
103 | * ftrace_format_##call(struct trace_seq *s) | |
104 | * { | |
105 | * struct ftrace_raw_##call field; | |
106 | * int ret; | |
107 | * | |
108 | * ret = trace_seq_printf(s, #type " " #item ";" | |
109 | * " offset:%u; size:%u;\n", | |
110 | * offsetof(struct ftrace_raw_##call, item), | |
111 | * sizeof(field.type)); | |
112 | * | |
113 | * } | |
114 | */ | |
115 | ||
116 | #undef TP_STRUCT__entry | |
117 | #define TP_STRUCT__entry(args...) args | |
118 | ||
119 | #undef __field | |
120 | #define __field(type, item) \ | |
121 | ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ | |
122 | "offset:%u;\tsize:%u;\n", \ | |
123 | (unsigned int)offsetof(typeof(field), item), \ | |
124 | (unsigned int)sizeof(field.item)); \ | |
125 | if (!ret) \ | |
126 | return 0; | |
127 | ||
43b51ead LZ |
128 | #undef __field_ext |
129 | #define __field_ext(type, item, filter_type) __field(type, item) | |
130 | ||
6ff9a64d SR |
131 | #undef __array |
132 | #define __array(type, item, len) \ | |
133 | ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ | |
134 | "offset:%u;\tsize:%u;\n", \ | |
135 | (unsigned int)offsetof(typeof(field), item), \ | |
136 | (unsigned int)sizeof(field.item)); \ | |
137 | if (!ret) \ | |
138 | return 0; | |
139 | ||
140 | #undef __dynamic_array | |
141 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 142 | ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\ |
6ff9a64d SR |
143 | "offset:%u;\tsize:%u;\n", \ |
144 | (unsigned int)offsetof(typeof(field), \ | |
145 | __data_loc_##item), \ | |
146 | (unsigned int)sizeof(field.__data_loc_##item)); \ | |
147 | if (!ret) \ | |
148 | return 0; | |
149 | ||
150 | #undef __string | |
151 | #define __string(item, src) __dynamic_array(char, item, -1) | |
152 | ||
153 | #undef __entry | |
154 | #define __entry REC | |
155 | ||
156 | #undef __print_symbolic | |
157 | #undef __get_dynamic_array | |
158 | #undef __get_str | |
159 | ||
160 | #undef TP_printk | |
161 | #define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) | |
162 | ||
163 | #undef TP_fast_assign | |
164 | #define TP_fast_assign(args...) args | |
165 | ||
3a659305 PZ |
166 | #undef TP_perf_assign |
167 | #define TP_perf_assign(args...) | |
168 | ||
6ff9a64d SR |
169 | #undef TRACE_EVENT |
170 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
171 | static int \ | |
e8f9f4d7 FW |
172 | ftrace_format_##call(struct ftrace_event_call *unused, \ |
173 | struct trace_seq *s) \ | |
6ff9a64d SR |
174 | { \ |
175 | struct ftrace_raw_##call field __attribute__((unused)); \ | |
176 | int ret = 0; \ | |
177 | \ | |
178 | tstruct; \ | |
179 | \ | |
180 | trace_seq_printf(s, "\nprint fmt: " print); \ | |
181 | \ | |
182 | return ret; \ | |
183 | } | |
184 | ||
185 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
186 | ||
9cbf1176 FW |
187 | /* |
188 | * Stage 3 of the trace events. | |
189 | * | |
f42c85e7 SR |
190 | * Override the macros in <trace/trace_events.h> to include the following: |
191 | * | |
192 | * enum print_line_t | |
193 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
194 | * { | |
195 | * struct trace_seq *s = &iter->seq; | |
196 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
197 | * struct trace_entry *entry; | |
be74b73a | 198 | * struct trace_seq *p; |
f42c85e7 SR |
199 | * int ret; |
200 | * | |
201 | * entry = iter->ent; | |
202 | * | |
203 | * if (entry->type != event_<call>.id) { | |
204 | * WARN_ON_ONCE(1); | |
205 | * return TRACE_TYPE_UNHANDLED; | |
206 | * } | |
207 | * | |
208 | * field = (typeof(field))entry; | |
209 | * | |
be74b73a | 210 | * p = get_cpu_var(ftrace_event_seq); |
56d8bd3f | 211 | * trace_seq_init(p); |
f42c85e7 | 212 | * ret = trace_seq_printf(s, <TP_printk> "\n"); |
be74b73a | 213 | * put_cpu(); |
f42c85e7 SR |
214 | * if (!ret) |
215 | * return TRACE_TYPE_PARTIAL_LINE; | |
216 | * | |
217 | * return TRACE_TYPE_HANDLED; | |
218 | * } | |
219 | * | |
220 | * This is the method used to print the raw event to the trace | |
221 | * output format. Note, this is not needed if the data is read | |
222 | * in binary. | |
223 | */ | |
224 | ||
225 | #undef __entry | |
226 | #define __entry field | |
227 | ||
228 | #undef TP_printk | |
229 | #define TP_printk(fmt, args...) fmt "\n", args | |
230 | ||
7fcb7c47 LZ |
231 | #undef __get_dynamic_array |
232 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 233 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 234 | |
9cbf1176 | 235 | #undef __get_str |
7fcb7c47 | 236 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 237 | |
be74b73a SR |
238 | #undef __print_flags |
239 | #define __print_flags(flag, delim, flag_array...) \ | |
240 | ({ \ | |
241 | static const struct trace_print_flags flags[] = \ | |
242 | { flag_array, { -1, NULL }}; \ | |
243 | ftrace_print_flags_seq(p, delim, flag, flags); \ | |
244 | }) | |
245 | ||
0f4fc29d SR |
246 | #undef __print_symbolic |
247 | #define __print_symbolic(value, symbol_array...) \ | |
248 | ({ \ | |
249 | static const struct trace_print_flags symbols[] = \ | |
250 | { symbol_array, { -1, NULL }}; \ | |
251 | ftrace_print_symbols_seq(p, value, symbols); \ | |
252 | }) | |
253 | ||
f42c85e7 SR |
254 | #undef TRACE_EVENT |
255 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
256 | enum print_line_t \ | |
257 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ | |
258 | { \ | |
259 | struct trace_seq *s = &iter->seq; \ | |
260 | struct ftrace_raw_##call *field; \ | |
261 | struct trace_entry *entry; \ | |
be74b73a | 262 | struct trace_seq *p; \ |
f42c85e7 SR |
263 | int ret; \ |
264 | \ | |
265 | entry = iter->ent; \ | |
266 | \ | |
267 | if (entry->type != event_##call.id) { \ | |
268 | WARN_ON_ONCE(1); \ | |
269 | return TRACE_TYPE_UNHANDLED; \ | |
270 | } \ | |
271 | \ | |
272 | field = (typeof(field))entry; \ | |
273 | \ | |
be74b73a | 274 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 275 | trace_seq_init(p); \ |
f42c85e7 | 276 | ret = trace_seq_printf(s, #call ": " print); \ |
be74b73a | 277 | put_cpu(); \ |
f42c85e7 SR |
278 | if (!ret) \ |
279 | return TRACE_TYPE_PARTIAL_LINE; \ | |
280 | \ | |
281 | return TRACE_TYPE_HANDLED; \ | |
282 | } | |
283 | ||
284 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
285 | ||
43b51ead LZ |
286 | #undef __field_ext |
287 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
288 | ret = trace_define_field(event_call, #type, #item, \ |
289 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
290 | sizeof(field.item), \ |
291 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
292 | if (ret) \ |
293 | return ret; | |
294 | ||
43b51ead LZ |
295 | #undef __field |
296 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
297 | ||
f42c85e7 SR |
298 | #undef __array |
299 | #define __array(type, item, len) \ | |
300 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
301 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
302 | offsetof(typeof(field), item), \ | |
43b51ead | 303 | sizeof(field.item), 0, FILTER_OTHER); \ |
f42c85e7 SR |
304 | if (ret) \ |
305 | return ret; | |
306 | ||
7fcb7c47 LZ |
307 | #undef __dynamic_array |
308 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 309 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead LZ |
310 | offsetof(typeof(field), __data_loc_##item), \ |
311 | sizeof(field.__data_loc_##item), 0, \ | |
312 | FILTER_OTHER); | |
7fcb7c47 | 313 | |
9cbf1176 | 314 | #undef __string |
7fcb7c47 | 315 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 316 | |
f42c85e7 SR |
317 | #undef TRACE_EVENT |
318 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
319 | int \ | |
14be96c9 | 320 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
321 | { \ |
322 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
323 | int ret; \ |
324 | \ | |
e647d6b3 LZ |
325 | ret = trace_define_common_fields(event_call); \ |
326 | if (ret) \ | |
327 | return ret; \ | |
f42c85e7 SR |
328 | \ |
329 | tstruct; \ | |
330 | \ | |
331 | return ret; \ | |
332 | } | |
333 | ||
334 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
335 | ||
7fcb7c47 LZ |
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 | ||
43b51ead LZ |
346 | #undef __field_ext |
347 | #define __field_ext(type, item, filter_type) | |
348 | ||
7fcb7c47 LZ |
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); \ | |
7d536cb3 | 356 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
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 TRACE_EVENT | |
363 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
364 | static inline 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 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
376 | ||
3a659305 PZ |
377 | #ifdef CONFIG_EVENT_PROFILE |
378 | ||
379 | /* | |
380 | * Generate the functions needed for tracepoint perf_counter support. | |
381 | * | |
f413cdb8 | 382 | * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
3a659305 PZ |
383 | * |
384 | * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call) | |
385 | * { | |
386 | * int ret = 0; | |
387 | * | |
388 | * if (!atomic_inc_return(&event_call->profile_count)) | |
389 | * ret = register_trace_<call>(ftrace_profile_<call>); | |
390 | * | |
391 | * return ret; | |
392 | * } | |
393 | * | |
394 | * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call) | |
395 | * { | |
396 | * if (atomic_add_negative(-1, &event->call->profile_count)) | |
397 | * unregister_trace_<call>(ftrace_profile_<call>); | |
398 | * } | |
399 | * | |
400 | */ | |
401 | ||
3a659305 PZ |
402 | #undef TRACE_EVENT |
403 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
404 | \ | |
f413cdb8 | 405 | static void ftrace_profile_##call(proto); \ |
3a659305 PZ |
406 | \ |
407 | static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ | |
408 | { \ | |
409 | int ret = 0; \ | |
410 | \ | |
411 | if (!atomic_inc_return(&event_call->profile_count)) \ | |
412 | ret = register_trace_##call(ftrace_profile_##call); \ | |
413 | \ | |
414 | return ret; \ | |
415 | } \ | |
416 | \ | |
417 | static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ | |
418 | { \ | |
419 | if (atomic_add_negative(-1, &event_call->profile_count)) \ | |
420 | unregister_trace_##call(ftrace_profile_##call); \ | |
421 | } | |
422 | ||
423 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
424 | ||
3a659305 PZ |
425 | #endif |
426 | ||
c32e827b | 427 | /* |
9cbf1176 | 428 | * Stage 4 of the trace events. |
c32e827b | 429 | * |
ea20d929 | 430 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b SR |
431 | * |
432 | * static void ftrace_event_<call>(proto) | |
433 | * { | |
ef18012b | 434 | * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
c32e827b SR |
435 | * } |
436 | * | |
437 | * static int ftrace_reg_event_<call>(void) | |
438 | * { | |
ef18012b | 439 | * int ret; |
c32e827b | 440 | * |
ef18012b SR |
441 | * ret = register_trace_<call>(ftrace_event_<call>); |
442 | * if (!ret) | |
443 | * pr_info("event trace: Could not activate trace point " | |
444 | * "probe to <call>"); | |
445 | * return ret; | |
c32e827b SR |
446 | * } |
447 | * | |
448 | * static void ftrace_unreg_event_<call>(void) | |
449 | * { | |
ef18012b | 450 | * unregister_trace_<call>(ftrace_event_<call>); |
c32e827b SR |
451 | * } |
452 | * | |
c32e827b | 453 | * |
157587d7 | 454 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
455 | * |
456 | * static struct ftrace_event_call event_<call>; | |
457 | * | |
458 | * static void ftrace_raw_event_<call>(proto) | |
459 | * { | |
ef18012b SR |
460 | * struct ring_buffer_event *event; |
461 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
462 | * unsigned long irq_flags; | |
463 | * int pc; | |
464 | * | |
465 | * local_save_flags(irq_flags); | |
466 | * pc = preempt_count(); | |
467 | * | |
468 | * event = trace_current_buffer_lock_reserve(event_<call>.id, | |
469 | * sizeof(struct ftrace_raw_<call>), | |
470 | * irq_flags, pc); | |
471 | * if (!event) | |
472 | * return; | |
473 | * entry = ring_buffer_event_data(event); | |
474 | * | |
475 | * <assign>; <-- Here we assign the entries by the __field and | |
0e3d0f05 | 476 | * __array macros. |
c32e827b | 477 | * |
ef18012b | 478 | * trace_current_buffer_unlock_commit(event, irq_flags, pc); |
c32e827b SR |
479 | * } |
480 | * | |
481 | * static int ftrace_raw_reg_event_<call>(void) | |
482 | * { | |
ef18012b | 483 | * int ret; |
c32e827b | 484 | * |
ef18012b SR |
485 | * ret = register_trace_<call>(ftrace_raw_event_<call>); |
486 | * if (!ret) | |
487 | * pr_info("event trace: Could not activate trace point " | |
488 | * "probe to <call>"); | |
489 | * return ret; | |
c32e827b SR |
490 | * } |
491 | * | |
492 | * static void ftrace_unreg_event_<call>(void) | |
493 | * { | |
ef18012b | 494 | * unregister_trace_<call>(ftrace_raw_event_<call>); |
c32e827b SR |
495 | * } |
496 | * | |
497 | * static struct trace_event ftrace_event_type_<call> = { | |
ef18012b | 498 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
499 | * }; |
500 | * | |
501 | * static int ftrace_raw_init_event_<call>(void) | |
502 | * { | |
ef18012b | 503 | * int id; |
c32e827b | 504 | * |
ef18012b SR |
505 | * id = register_ftrace_event(&ftrace_event_type_<call>); |
506 | * if (!id) | |
507 | * return -ENODEV; | |
508 | * event_<call>.id = id; | |
509 | * return 0; | |
c32e827b SR |
510 | * } |
511 | * | |
512 | * static struct ftrace_event_call __used | |
513 | * __attribute__((__aligned__(4))) | |
514 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 515 | * .name = "<call>", |
0e3d0f05 | 516 | * .system = "<system>", |
ef18012b SR |
517 | * .raw_init = ftrace_raw_init_event_<call>, |
518 | * .regfunc = ftrace_reg_event_<call>, | |
519 | * .unregfunc = ftrace_unreg_event_<call>, | |
981d081e | 520 | * .show_format = ftrace_format_<call>, |
c32e827b SR |
521 | * } |
522 | * | |
523 | */ | |
524 | ||
2939b046 SR |
525 | #undef TP_FMT |
526 | #define TP_FMT(fmt, args...) fmt "\n", ##args | |
c32e827b | 527 | |
ac199db0 | 528 | #ifdef CONFIG_EVENT_PROFILE |
ac199db0 PZ |
529 | |
530 | #define _TRACE_PROFILE_INIT(call) \ | |
531 | .profile_count = ATOMIC_INIT(-1), \ | |
532 | .profile_enable = ftrace_profile_enable_##call, \ | |
533 | .profile_disable = ftrace_profile_disable_##call, | |
534 | ||
535 | #else | |
ac199db0 PZ |
536 | #define _TRACE_PROFILE_INIT(call) |
537 | #endif | |
538 | ||
da4d0302 SR |
539 | #undef __entry |
540 | #define __entry entry | |
d20e3b03 | 541 | |
9cbf1176 FW |
542 | #undef __field |
543 | #define __field(type, item) | |
544 | ||
545 | #undef __array | |
546 | #define __array(type, item, len) | |
547 | ||
7fcb7c47 LZ |
548 | #undef __dynamic_array |
549 | #define __dynamic_array(type, item, len) \ | |
550 | __entry->__data_loc_##item = __data_offsets.item; | |
551 | ||
9cbf1176 | 552 | #undef __string |
7fcb7c47 | 553 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
554 | |
555 | #undef __assign_str | |
556 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
557 | strcpy(__get_str(dst), src); |
558 | ||
da4d0302 | 559 | #undef TRACE_EVENT |
30a8fecc | 560 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
c32e827b SR |
561 | \ |
562 | static struct ftrace_event_call event_##call; \ | |
563 | \ | |
564 | static void ftrace_raw_event_##call(proto) \ | |
565 | { \ | |
7fcb7c47 | 566 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f2aebaee | 567 | struct ftrace_event_call *event_call = &event_##call; \ |
c32e827b SR |
568 | struct ring_buffer_event *event; \ |
569 | struct ftrace_raw_##call *entry; \ | |
570 | unsigned long irq_flags; \ | |
7fcb7c47 | 571 | int __data_size; \ |
c32e827b SR |
572 | int pc; \ |
573 | \ | |
574 | local_save_flags(irq_flags); \ | |
575 | pc = preempt_count(); \ | |
576 | \ | |
7fcb7c47 | 577 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 578 | \ |
c32e827b | 579 | event = trace_current_buffer_lock_reserve(event_##call.id, \ |
7fcb7c47 | 580 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 581 | irq_flags, pc); \ |
c32e827b SR |
582 | if (!event) \ |
583 | return; \ | |
584 | entry = ring_buffer_event_data(event); \ | |
585 | \ | |
7fcb7c47 LZ |
586 | \ |
587 | tstruct \ | |
588 | \ | |
a9c1c3ab | 589 | { assign; } \ |
c32e827b | 590 | \ |
f2aebaee | 591 | if (!filter_current_check_discard(event_call, entry, event)) \ |
77d9f465 | 592 | trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ |
c32e827b SR |
593 | } \ |
594 | \ | |
69fd4f0e | 595 | static int ftrace_raw_reg_event_##call(void *ptr) \ |
c32e827b SR |
596 | { \ |
597 | int ret; \ | |
598 | \ | |
599 | ret = register_trace_##call(ftrace_raw_event_##call); \ | |
633ddaa7 | 600 | if (ret) \ |
c32e827b | 601 | pr_info("event trace: Could not activate trace point " \ |
633ddaa7 | 602 | "probe to " #call "\n"); \ |
c32e827b SR |
603 | return ret; \ |
604 | } \ | |
605 | \ | |
69fd4f0e | 606 | static void ftrace_raw_unreg_event_##call(void *ptr) \ |
c32e827b SR |
607 | { \ |
608 | unregister_trace_##call(ftrace_raw_event_##call); \ | |
609 | } \ | |
610 | \ | |
611 | static struct trace_event ftrace_event_type_##call = { \ | |
612 | .trace = ftrace_raw_output_##call, \ | |
613 | }; \ | |
614 | \ | |
615 | static int ftrace_raw_init_event_##call(void) \ | |
616 | { \ | |
617 | int id; \ | |
618 | \ | |
619 | id = register_ftrace_event(&ftrace_event_type_##call); \ | |
620 | if (!id) \ | |
621 | return -ENODEV; \ | |
622 | event_##call.id = id; \ | |
cf027f64 | 623 | INIT_LIST_HEAD(&event_##call.fields); \ |
0a19e53c | 624 | init_preds(&event_##call); \ |
c32e827b SR |
625 | return 0; \ |
626 | } \ | |
627 | \ | |
628 | static struct ftrace_event_call __used \ | |
629 | __attribute__((__aligned__(4))) \ | |
630 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 631 | .name = #call, \ |
9cc26a26 | 632 | .system = __stringify(TRACE_SYSTEM), \ |
6d723736 | 633 | .event = &ftrace_event_type_##call, \ |
c32e827b | 634 | .raw_init = ftrace_raw_init_event_##call, \ |
da4d0302 SR |
635 | .regfunc = ftrace_raw_reg_event_##call, \ |
636 | .unregfunc = ftrace_raw_unreg_event_##call, \ | |
981d081e | 637 | .show_format = ftrace_format_##call, \ |
cf027f64 | 638 | .define_fields = ftrace_define_fields_##call, \ |
ac199db0 | 639 | _TRACE_PROFILE_INIT(call) \ |
c32e827b | 640 | } |
ac199db0 | 641 | |
f42c85e7 | 642 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 643 | |
f413cdb8 FW |
644 | /* |
645 | * Define the insertion callback to profile events | |
646 | * | |
647 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
648 | * insert in the ring buffer but in a perf counter. | |
649 | * | |
650 | * static void ftrace_profile_<call>(proto) | |
651 | * { | |
652 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
653 | * struct ftrace_event_call *event_call = &event_<call>; | |
654 | * extern void perf_tpcounter_event(int, u64, u64, void *, int); | |
655 | * struct ftrace_raw_##call *entry; | |
656 | * u64 __addr = 0, __count = 1; | |
657 | * unsigned long irq_flags; | |
658 | * int __entry_size; | |
659 | * int __data_size; | |
660 | * int pc; | |
661 | * | |
662 | * local_save_flags(irq_flags); | |
663 | * pc = preempt_count(); | |
664 | * | |
665 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
666 | * |
667 | * // Below we want to get the aligned size by taking into account | |
668 | * // the u32 field that will later store the buffer size | |
669 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
670 | * sizeof(u64)); | |
671 | * __entry_size -= sizeof(u32); | |
f413cdb8 FW |
672 | * |
673 | * do { | |
674 | * char raw_data[__entry_size]; <- allocate our sample in the stack | |
675 | * struct trace_entry *ent; | |
676 | * | |
1853db0e FW |
677 | * zero dead bytes from alignment to avoid stack leak to userspace: |
678 | * | |
679 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
f413cdb8 FW |
680 | * entry = (struct ftrace_raw_<call> *)raw_data; |
681 | * ent = &entry->ent; | |
682 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
683 | * ent->type = event_call->id; | |
684 | * | |
685 | * <tstruct> <- do some jobs with dynamic arrays | |
686 | * | |
687 | * <assign> <- affect our values | |
688 | * | |
689 | * perf_tpcounter_event(event_call->id, __addr, __count, entry, | |
690 | * __entry_size); <- submit them to perf counter | |
691 | * } while (0); | |
692 | * | |
693 | * } | |
694 | */ | |
695 | ||
696 | #ifdef CONFIG_EVENT_PROFILE | |
697 | ||
698 | #undef __perf_addr | |
699 | #define __perf_addr(a) __addr = (a) | |
700 | ||
701 | #undef __perf_count | |
702 | #define __perf_count(c) __count = (c) | |
703 | ||
704 | #undef TRACE_EVENT | |
705 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
706 | static void ftrace_profile_##call(proto) \ | |
707 | { \ | |
708 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
709 | struct ftrace_event_call *event_call = &event_##call; \ | |
710 | extern void perf_tpcounter_event(int, u64, u64, void *, int); \ | |
711 | struct ftrace_raw_##call *entry; \ | |
712 | u64 __addr = 0, __count = 1; \ | |
713 | unsigned long irq_flags; \ | |
714 | int __entry_size; \ | |
715 | int __data_size; \ | |
716 | int pc; \ | |
717 | \ | |
718 | local_save_flags(irq_flags); \ | |
719 | pc = preempt_count(); \ | |
720 | \ | |
721 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
a044560c PZ |
722 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
723 | sizeof(u64)); \ | |
304703ab | 724 | __entry_size -= sizeof(u32); \ |
f413cdb8 FW |
725 | \ |
726 | do { \ | |
727 | char raw_data[__entry_size]; \ | |
728 | struct trace_entry *ent; \ | |
729 | \ | |
1853db0e | 730 | *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \ |
f413cdb8 FW |
731 | entry = (struct ftrace_raw_##call *)raw_data; \ |
732 | ent = &entry->ent; \ | |
733 | tracing_generic_entry_update(ent, irq_flags, pc); \ | |
734 | ent->type = event_call->id; \ | |
735 | \ | |
736 | tstruct \ | |
737 | \ | |
738 | { assign; } \ | |
739 | \ | |
740 | perf_tpcounter_event(event_call->id, __addr, __count, entry,\ | |
741 | __entry_size); \ | |
742 | } while (0); \ | |
743 | \ | |
744 | } | |
745 | ||
746 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
747 | #endif /* CONFIG_EVENT_PROFILE */ | |
748 | ||
ac199db0 PZ |
749 | #undef _TRACE_PROFILE_INIT |
750 |