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 | ||
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 | ||
0dd7b747 FW |
48 | #undef __cpparg |
49 | #define __cpparg(arg...) arg | |
50 | ||
97419875 JS |
51 | /* Callbacks are meaningless to ftrace. */ |
52 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
53 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
54 | assign, print, reg, unreg) \ | |
55 | TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \ | |
56 | __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \ | |
97419875 | 57 | |
f42c85e7 SR |
58 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
59 | ||
9cbf1176 | 60 | |
f42c85e7 SR |
61 | /* |
62 | * Stage 2 of the trace events. | |
63 | * | |
9cbf1176 FW |
64 | * Include the following: |
65 | * | |
7fcb7c47 | 66 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
67 | * u32 <item1>; |
68 | * u32 <item2>; | |
9cbf1176 FW |
69 | * [...] |
70 | * }; | |
71 | * | |
7d536cb3 | 72 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 73 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 74 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
75 | */ |
76 | ||
7fcb7c47 | 77 | #undef __field |
43b51ead LZ |
78 | #define __field(type, item) |
79 | ||
80 | #undef __field_ext | |
81 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 82 | |
9cbf1176 FW |
83 | #undef __array |
84 | #define __array(type, item, len) | |
85 | ||
7fcb7c47 | 86 | #undef __dynamic_array |
7d536cb3 | 87 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
88 | |
89 | #undef __string | |
7fcb7c47 | 90 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 FW |
91 | |
92 | #undef TRACE_EVENT | |
93 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 94 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
95 | tstruct; \ |
96 | }; | |
97 | ||
98 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
99 | ||
6ff9a64d SR |
100 | /* |
101 | * Setup the showing format of trace point. | |
102 | * | |
103 | * int | |
104 | * ftrace_format_##call(struct trace_seq *s) | |
105 | * { | |
106 | * struct ftrace_raw_##call field; | |
107 | * int ret; | |
108 | * | |
109 | * ret = trace_seq_printf(s, #type " " #item ";" | |
110 | * " offset:%u; size:%u;\n", | |
111 | * offsetof(struct ftrace_raw_##call, item), | |
112 | * sizeof(field.type)); | |
113 | * | |
114 | * } | |
115 | */ | |
116 | ||
117 | #undef TP_STRUCT__entry | |
118 | #define TP_STRUCT__entry(args...) args | |
119 | ||
120 | #undef __field | |
121 | #define __field(type, item) \ | |
122 | ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ | |
123 | "offset:%u;\tsize:%u;\n", \ | |
124 | (unsigned int)offsetof(typeof(field), item), \ | |
125 | (unsigned int)sizeof(field.item)); \ | |
126 | if (!ret) \ | |
127 | return 0; | |
128 | ||
43b51ead LZ |
129 | #undef __field_ext |
130 | #define __field_ext(type, item, filter_type) __field(type, item) | |
131 | ||
6ff9a64d SR |
132 | #undef __array |
133 | #define __array(type, item, len) \ | |
134 | ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ | |
135 | "offset:%u;\tsize:%u;\n", \ | |
136 | (unsigned int)offsetof(typeof(field), item), \ | |
137 | (unsigned int)sizeof(field.item)); \ | |
138 | if (!ret) \ | |
139 | return 0; | |
140 | ||
141 | #undef __dynamic_array | |
142 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 143 | ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\ |
6ff9a64d SR |
144 | "offset:%u;\tsize:%u;\n", \ |
145 | (unsigned int)offsetof(typeof(field), \ | |
146 | __data_loc_##item), \ | |
147 | (unsigned int)sizeof(field.__data_loc_##item)); \ | |
148 | if (!ret) \ | |
149 | return 0; | |
150 | ||
151 | #undef __string | |
152 | #define __string(item, src) __dynamic_array(char, item, -1) | |
153 | ||
154 | #undef __entry | |
155 | #define __entry REC | |
156 | ||
157 | #undef __print_symbolic | |
158 | #undef __get_dynamic_array | |
159 | #undef __get_str | |
160 | ||
161 | #undef TP_printk | |
162 | #define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) | |
163 | ||
164 | #undef TP_fast_assign | |
165 | #define TP_fast_assign(args...) args | |
166 | ||
3a659305 PZ |
167 | #undef TP_perf_assign |
168 | #define TP_perf_assign(args...) | |
169 | ||
6ff9a64d SR |
170 | #undef TRACE_EVENT |
171 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
172 | static int \ | |
e8f9f4d7 FW |
173 | ftrace_format_##call(struct ftrace_event_call *unused, \ |
174 | struct trace_seq *s) \ | |
6ff9a64d SR |
175 | { \ |
176 | struct ftrace_raw_##call field __attribute__((unused)); \ | |
177 | int ret = 0; \ | |
178 | \ | |
179 | tstruct; \ | |
180 | \ | |
181 | trace_seq_printf(s, "\nprint fmt: " print); \ | |
182 | \ | |
183 | return ret; \ | |
184 | } | |
185 | ||
186 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
187 | ||
9cbf1176 FW |
188 | /* |
189 | * Stage 3 of the trace events. | |
190 | * | |
f42c85e7 SR |
191 | * Override the macros in <trace/trace_events.h> to include the following: |
192 | * | |
193 | * enum print_line_t | |
194 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
195 | * { | |
196 | * struct trace_seq *s = &iter->seq; | |
197 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
198 | * struct trace_entry *entry; | |
be74b73a | 199 | * struct trace_seq *p; |
f42c85e7 SR |
200 | * int ret; |
201 | * | |
202 | * entry = iter->ent; | |
203 | * | |
204 | * if (entry->type != event_<call>.id) { | |
205 | * WARN_ON_ONCE(1); | |
206 | * return TRACE_TYPE_UNHANDLED; | |
207 | * } | |
208 | * | |
209 | * field = (typeof(field))entry; | |
210 | * | |
be74b73a | 211 | * p = get_cpu_var(ftrace_event_seq); |
56d8bd3f | 212 | * trace_seq_init(p); |
f42c85e7 | 213 | * ret = trace_seq_printf(s, <TP_printk> "\n"); |
be74b73a | 214 | * put_cpu(); |
f42c85e7 SR |
215 | * if (!ret) |
216 | * return TRACE_TYPE_PARTIAL_LINE; | |
217 | * | |
218 | * return TRACE_TYPE_HANDLED; | |
219 | * } | |
220 | * | |
221 | * This is the method used to print the raw event to the trace | |
222 | * output format. Note, this is not needed if the data is read | |
223 | * in binary. | |
224 | */ | |
225 | ||
226 | #undef __entry | |
227 | #define __entry field | |
228 | ||
229 | #undef TP_printk | |
230 | #define TP_printk(fmt, args...) fmt "\n", args | |
231 | ||
7fcb7c47 LZ |
232 | #undef __get_dynamic_array |
233 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 234 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 235 | |
9cbf1176 | 236 | #undef __get_str |
7fcb7c47 | 237 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 238 | |
be74b73a SR |
239 | #undef __print_flags |
240 | #define __print_flags(flag, delim, flag_array...) \ | |
241 | ({ \ | |
242 | static const struct trace_print_flags flags[] = \ | |
243 | { flag_array, { -1, NULL }}; \ | |
244 | ftrace_print_flags_seq(p, delim, flag, flags); \ | |
245 | }) | |
246 | ||
0f4fc29d SR |
247 | #undef __print_symbolic |
248 | #define __print_symbolic(value, symbol_array...) \ | |
249 | ({ \ | |
250 | static const struct trace_print_flags symbols[] = \ | |
251 | { symbol_array, { -1, NULL }}; \ | |
252 | ftrace_print_symbols_seq(p, value, symbols); \ | |
253 | }) | |
254 | ||
f42c85e7 SR |
255 | #undef TRACE_EVENT |
256 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
257 | enum print_line_t \ | |
258 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ | |
259 | { \ | |
260 | struct trace_seq *s = &iter->seq; \ | |
261 | struct ftrace_raw_##call *field; \ | |
262 | struct trace_entry *entry; \ | |
be74b73a | 263 | struct trace_seq *p; \ |
f42c85e7 SR |
264 | int ret; \ |
265 | \ | |
266 | entry = iter->ent; \ | |
267 | \ | |
268 | if (entry->type != event_##call.id) { \ | |
269 | WARN_ON_ONCE(1); \ | |
270 | return TRACE_TYPE_UNHANDLED; \ | |
271 | } \ | |
272 | \ | |
273 | field = (typeof(field))entry; \ | |
274 | \ | |
be74b73a | 275 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 276 | trace_seq_init(p); \ |
f42c85e7 | 277 | ret = trace_seq_printf(s, #call ": " print); \ |
be74b73a | 278 | put_cpu(); \ |
f42c85e7 SR |
279 | if (!ret) \ |
280 | return TRACE_TYPE_PARTIAL_LINE; \ | |
281 | \ | |
282 | return TRACE_TYPE_HANDLED; \ | |
283 | } | |
284 | ||
285 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
286 | ||
43b51ead LZ |
287 | #undef __field_ext |
288 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
289 | ret = trace_define_field(event_call, #type, #item, \ |
290 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
291 | sizeof(field.item), \ |
292 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
293 | if (ret) \ |
294 | return ret; | |
295 | ||
43b51ead LZ |
296 | #undef __field |
297 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
298 | ||
f42c85e7 SR |
299 | #undef __array |
300 | #define __array(type, item, len) \ | |
301 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
302 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
303 | offsetof(typeof(field), item), \ | |
43b51ead | 304 | sizeof(field.item), 0, FILTER_OTHER); \ |
f42c85e7 SR |
305 | if (ret) \ |
306 | return ret; | |
307 | ||
7fcb7c47 LZ |
308 | #undef __dynamic_array |
309 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 310 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead LZ |
311 | offsetof(typeof(field), __data_loc_##item), \ |
312 | sizeof(field.__data_loc_##item), 0, \ | |
313 | FILTER_OTHER); | |
7fcb7c47 | 314 | |
9cbf1176 | 315 | #undef __string |
7fcb7c47 | 316 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 317 | |
f42c85e7 SR |
318 | #undef TRACE_EVENT |
319 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ | |
320 | int \ | |
14be96c9 | 321 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
322 | { \ |
323 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
324 | int ret; \ |
325 | \ | |
e647d6b3 LZ |
326 | ret = trace_define_common_fields(event_call); \ |
327 | if (ret) \ | |
328 | return ret; \ | |
f42c85e7 SR |
329 | \ |
330 | tstruct; \ | |
331 | \ | |
332 | return ret; \ | |
333 | } | |
334 | ||
335 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
336 | ||
7fcb7c47 LZ |
337 | /* |
338 | * remember the offset of each array from the beginning of the event. | |
339 | */ | |
340 | ||
341 | #undef __entry | |
342 | #define __entry entry | |
343 | ||
344 | #undef __field | |
345 | #define __field(type, item) | |
346 | ||
43b51ead LZ |
347 | #undef __field_ext |
348 | #define __field_ext(type, item, filter_type) | |
349 | ||
7fcb7c47 LZ |
350 | #undef __array |
351 | #define __array(type, item, len) | |
352 | ||
353 | #undef __dynamic_array | |
354 | #define __dynamic_array(type, item, len) \ | |
355 | __data_offsets->item = __data_size + \ | |
356 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 357 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
358 | __data_size += (len) * sizeof(type); |
359 | ||
360 | #undef __string | |
361 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) \ | |
362 | ||
363 | #undef TRACE_EVENT | |
364 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
365 | static inline int ftrace_get_offsets_##call( \ | |
366 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ | |
367 | { \ | |
368 | int __data_size = 0; \ | |
369 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
370 | \ | |
371 | tstruct; \ | |
372 | \ | |
373 | return __data_size; \ | |
374 | } | |
375 | ||
376 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
377 | ||
3a659305 PZ |
378 | #ifdef CONFIG_EVENT_PROFILE |
379 | ||
380 | /* | |
381 | * Generate the functions needed for tracepoint perf_counter support. | |
382 | * | |
f413cdb8 | 383 | * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
3a659305 PZ |
384 | * |
385 | * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call) | |
386 | * { | |
387 | * int ret = 0; | |
388 | * | |
389 | * if (!atomic_inc_return(&event_call->profile_count)) | |
390 | * ret = register_trace_<call>(ftrace_profile_<call>); | |
391 | * | |
392 | * return ret; | |
393 | * } | |
394 | * | |
395 | * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call) | |
396 | * { | |
397 | * if (atomic_add_negative(-1, &event->call->profile_count)) | |
398 | * unregister_trace_<call>(ftrace_profile_<call>); | |
399 | * } | |
400 | * | |
401 | */ | |
402 | ||
3a659305 PZ |
403 | #undef TRACE_EVENT |
404 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
405 | \ | |
f413cdb8 | 406 | static void ftrace_profile_##call(proto); \ |
3a659305 PZ |
407 | \ |
408 | static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ | |
409 | { \ | |
410 | int ret = 0; \ | |
411 | \ | |
412 | if (!atomic_inc_return(&event_call->profile_count)) \ | |
413 | ret = register_trace_##call(ftrace_profile_##call); \ | |
414 | \ | |
415 | return ret; \ | |
416 | } \ | |
417 | \ | |
418 | static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ | |
419 | { \ | |
420 | if (atomic_add_negative(-1, &event_call->profile_count)) \ | |
421 | unregister_trace_##call(ftrace_profile_##call); \ | |
422 | } | |
423 | ||
424 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
425 | ||
3a659305 PZ |
426 | #endif |
427 | ||
c32e827b | 428 | /* |
9cbf1176 | 429 | * Stage 4 of the trace events. |
c32e827b | 430 | * |
ea20d929 | 431 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b SR |
432 | * |
433 | * static void ftrace_event_<call>(proto) | |
434 | * { | |
ef18012b | 435 | * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
c32e827b SR |
436 | * } |
437 | * | |
438 | * static int ftrace_reg_event_<call>(void) | |
439 | * { | |
ef18012b | 440 | * int ret; |
c32e827b | 441 | * |
ef18012b SR |
442 | * ret = register_trace_<call>(ftrace_event_<call>); |
443 | * if (!ret) | |
444 | * pr_info("event trace: Could not activate trace point " | |
445 | * "probe to <call>"); | |
446 | * return ret; | |
c32e827b SR |
447 | * } |
448 | * | |
449 | * static void ftrace_unreg_event_<call>(void) | |
450 | * { | |
ef18012b | 451 | * unregister_trace_<call>(ftrace_event_<call>); |
c32e827b SR |
452 | * } |
453 | * | |
c32e827b | 454 | * |
157587d7 | 455 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
456 | * |
457 | * static struct ftrace_event_call event_<call>; | |
458 | * | |
459 | * static void ftrace_raw_event_<call>(proto) | |
460 | * { | |
ef18012b SR |
461 | * struct ring_buffer_event *event; |
462 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
463 | * unsigned long irq_flags; | |
464 | * int pc; | |
465 | * | |
466 | * local_save_flags(irq_flags); | |
467 | * pc = preempt_count(); | |
468 | * | |
469 | * event = trace_current_buffer_lock_reserve(event_<call>.id, | |
470 | * sizeof(struct ftrace_raw_<call>), | |
471 | * irq_flags, pc); | |
472 | * if (!event) | |
473 | * return; | |
474 | * entry = ring_buffer_event_data(event); | |
475 | * | |
476 | * <assign>; <-- Here we assign the entries by the __field and | |
0e3d0f05 | 477 | * __array macros. |
c32e827b | 478 | * |
ef18012b | 479 | * trace_current_buffer_unlock_commit(event, irq_flags, pc); |
c32e827b SR |
480 | * } |
481 | * | |
482 | * static int ftrace_raw_reg_event_<call>(void) | |
483 | * { | |
ef18012b | 484 | * int ret; |
c32e827b | 485 | * |
ef18012b SR |
486 | * ret = register_trace_<call>(ftrace_raw_event_<call>); |
487 | * if (!ret) | |
488 | * pr_info("event trace: Could not activate trace point " | |
489 | * "probe to <call>"); | |
490 | * return ret; | |
c32e827b SR |
491 | * } |
492 | * | |
493 | * static void ftrace_unreg_event_<call>(void) | |
494 | * { | |
ef18012b | 495 | * unregister_trace_<call>(ftrace_raw_event_<call>); |
c32e827b SR |
496 | * } |
497 | * | |
498 | * static struct trace_event ftrace_event_type_<call> = { | |
ef18012b | 499 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
500 | * }; |
501 | * | |
502 | * static int ftrace_raw_init_event_<call>(void) | |
503 | * { | |
ef18012b | 504 | * int id; |
c32e827b | 505 | * |
ef18012b SR |
506 | * id = register_ftrace_event(&ftrace_event_type_<call>); |
507 | * if (!id) | |
508 | * return -ENODEV; | |
509 | * event_<call>.id = id; | |
510 | * return 0; | |
c32e827b SR |
511 | * } |
512 | * | |
513 | * static struct ftrace_event_call __used | |
514 | * __attribute__((__aligned__(4))) | |
515 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 516 | * .name = "<call>", |
0e3d0f05 | 517 | * .system = "<system>", |
ef18012b SR |
518 | * .raw_init = ftrace_raw_init_event_<call>, |
519 | * .regfunc = ftrace_reg_event_<call>, | |
520 | * .unregfunc = ftrace_unreg_event_<call>, | |
981d081e | 521 | * .show_format = ftrace_format_<call>, |
c32e827b SR |
522 | * } |
523 | * | |
524 | */ | |
525 | ||
2939b046 SR |
526 | #undef TP_FMT |
527 | #define TP_FMT(fmt, args...) fmt "\n", ##args | |
c32e827b | 528 | |
ac199db0 | 529 | #ifdef CONFIG_EVENT_PROFILE |
ac199db0 PZ |
530 | |
531 | #define _TRACE_PROFILE_INIT(call) \ | |
532 | .profile_count = ATOMIC_INIT(-1), \ | |
533 | .profile_enable = ftrace_profile_enable_##call, \ | |
534 | .profile_disable = ftrace_profile_disable_##call, | |
535 | ||
536 | #else | |
ac199db0 PZ |
537 | #define _TRACE_PROFILE_INIT(call) |
538 | #endif | |
539 | ||
da4d0302 SR |
540 | #undef __entry |
541 | #define __entry entry | |
d20e3b03 | 542 | |
9cbf1176 FW |
543 | #undef __field |
544 | #define __field(type, item) | |
545 | ||
546 | #undef __array | |
547 | #define __array(type, item, len) | |
548 | ||
7fcb7c47 LZ |
549 | #undef __dynamic_array |
550 | #define __dynamic_array(type, item, len) \ | |
551 | __entry->__data_loc_##item = __data_offsets.item; | |
552 | ||
9cbf1176 | 553 | #undef __string |
7fcb7c47 | 554 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
555 | |
556 | #undef __assign_str | |
557 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
558 | strcpy(__get_str(dst), src); |
559 | ||
da4d0302 | 560 | #undef TRACE_EVENT |
30a8fecc | 561 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
c32e827b SR |
562 | \ |
563 | static struct ftrace_event_call event_##call; \ | |
564 | \ | |
565 | static void ftrace_raw_event_##call(proto) \ | |
566 | { \ | |
7fcb7c47 | 567 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f2aebaee | 568 | struct ftrace_event_call *event_call = &event_##call; \ |
c32e827b SR |
569 | struct ring_buffer_event *event; \ |
570 | struct ftrace_raw_##call *entry; \ | |
571 | unsigned long irq_flags; \ | |
7fcb7c47 | 572 | int __data_size; \ |
c32e827b SR |
573 | int pc; \ |
574 | \ | |
575 | local_save_flags(irq_flags); \ | |
576 | pc = preempt_count(); \ | |
577 | \ | |
7fcb7c47 | 578 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 579 | \ |
c32e827b | 580 | event = trace_current_buffer_lock_reserve(event_##call.id, \ |
7fcb7c47 | 581 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 582 | irq_flags, pc); \ |
c32e827b SR |
583 | if (!event) \ |
584 | return; \ | |
585 | entry = ring_buffer_event_data(event); \ | |
586 | \ | |
7fcb7c47 LZ |
587 | \ |
588 | tstruct \ | |
589 | \ | |
a9c1c3ab | 590 | { assign; } \ |
c32e827b | 591 | \ |
f2aebaee | 592 | if (!filter_current_check_discard(event_call, entry, event)) \ |
77d9f465 | 593 | trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ |
c32e827b SR |
594 | } \ |
595 | \ | |
69fd4f0e | 596 | static int ftrace_raw_reg_event_##call(void *ptr) \ |
c32e827b SR |
597 | { \ |
598 | int ret; \ | |
599 | \ | |
600 | ret = register_trace_##call(ftrace_raw_event_##call); \ | |
633ddaa7 | 601 | if (ret) \ |
c32e827b | 602 | pr_info("event trace: Could not activate trace point " \ |
633ddaa7 | 603 | "probe to " #call "\n"); \ |
c32e827b SR |
604 | return ret; \ |
605 | } \ | |
606 | \ | |
69fd4f0e | 607 | static void ftrace_raw_unreg_event_##call(void *ptr) \ |
c32e827b SR |
608 | { \ |
609 | unregister_trace_##call(ftrace_raw_event_##call); \ | |
610 | } \ | |
611 | \ | |
612 | static struct trace_event ftrace_event_type_##call = { \ | |
613 | .trace = ftrace_raw_output_##call, \ | |
614 | }; \ | |
615 | \ | |
616 | static int ftrace_raw_init_event_##call(void) \ | |
617 | { \ | |
618 | int id; \ | |
619 | \ | |
620 | id = register_ftrace_event(&ftrace_event_type_##call); \ | |
621 | if (!id) \ | |
622 | return -ENODEV; \ | |
623 | event_##call.id = id; \ | |
cf027f64 | 624 | INIT_LIST_HEAD(&event_##call.fields); \ |
0a19e53c | 625 | init_preds(&event_##call); \ |
c32e827b SR |
626 | return 0; \ |
627 | } \ | |
628 | \ | |
629 | static struct ftrace_event_call __used \ | |
630 | __attribute__((__aligned__(4))) \ | |
631 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 632 | .name = #call, \ |
9cc26a26 | 633 | .system = __stringify(TRACE_SYSTEM), \ |
6d723736 | 634 | .event = &ftrace_event_type_##call, \ |
c32e827b | 635 | .raw_init = ftrace_raw_init_event_##call, \ |
da4d0302 SR |
636 | .regfunc = ftrace_raw_reg_event_##call, \ |
637 | .unregfunc = ftrace_raw_unreg_event_##call, \ | |
981d081e | 638 | .show_format = ftrace_format_##call, \ |
cf027f64 | 639 | .define_fields = ftrace_define_fields_##call, \ |
ac199db0 | 640 | _TRACE_PROFILE_INIT(call) \ |
c32e827b | 641 | } |
ac199db0 | 642 | |
f42c85e7 | 643 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 644 | |
f413cdb8 FW |
645 | /* |
646 | * Define the insertion callback to profile events | |
647 | * | |
648 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
649 | * insert in the ring buffer but in a perf counter. | |
650 | * | |
651 | * static void ftrace_profile_<call>(proto) | |
652 | * { | |
653 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
654 | * struct ftrace_event_call *event_call = &event_<call>; | |
655 | * extern void perf_tpcounter_event(int, u64, u64, void *, int); | |
656 | * struct ftrace_raw_##call *entry; | |
657 | * u64 __addr = 0, __count = 1; | |
658 | * unsigned long irq_flags; | |
659 | * int __entry_size; | |
660 | * int __data_size; | |
661 | * int pc; | |
662 | * | |
663 | * local_save_flags(irq_flags); | |
664 | * pc = preempt_count(); | |
665 | * | |
666 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
667 | * |
668 | * // Below we want to get the aligned size by taking into account | |
669 | * // the u32 field that will later store the buffer size | |
670 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
671 | * sizeof(u64)); | |
672 | * __entry_size -= sizeof(u32); | |
f413cdb8 FW |
673 | * |
674 | * do { | |
675 | * char raw_data[__entry_size]; <- allocate our sample in the stack | |
676 | * struct trace_entry *ent; | |
677 | * | |
1853db0e FW |
678 | * zero dead bytes from alignment to avoid stack leak to userspace: |
679 | * | |
680 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
f413cdb8 FW |
681 | * entry = (struct ftrace_raw_<call> *)raw_data; |
682 | * ent = &entry->ent; | |
683 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
684 | * ent->type = event_call->id; | |
685 | * | |
686 | * <tstruct> <- do some jobs with dynamic arrays | |
687 | * | |
688 | * <assign> <- affect our values | |
689 | * | |
690 | * perf_tpcounter_event(event_call->id, __addr, __count, entry, | |
691 | * __entry_size); <- submit them to perf counter | |
692 | * } while (0); | |
693 | * | |
694 | * } | |
695 | */ | |
696 | ||
697 | #ifdef CONFIG_EVENT_PROFILE | |
698 | ||
699 | #undef __perf_addr | |
700 | #define __perf_addr(a) __addr = (a) | |
701 | ||
702 | #undef __perf_count | |
703 | #define __perf_count(c) __count = (c) | |
704 | ||
705 | #undef TRACE_EVENT | |
706 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ | |
707 | static void ftrace_profile_##call(proto) \ | |
708 | { \ | |
709 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
710 | struct ftrace_event_call *event_call = &event_##call; \ | |
711 | extern void perf_tpcounter_event(int, u64, u64, void *, int); \ | |
712 | struct ftrace_raw_##call *entry; \ | |
713 | u64 __addr = 0, __count = 1; \ | |
714 | unsigned long irq_flags; \ | |
715 | int __entry_size; \ | |
716 | int __data_size; \ | |
717 | int pc; \ | |
718 | \ | |
719 | local_save_flags(irq_flags); \ | |
720 | pc = preempt_count(); \ | |
721 | \ | |
722 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
a044560c PZ |
723 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
724 | sizeof(u64)); \ | |
304703ab | 725 | __entry_size -= sizeof(u32); \ |
f413cdb8 FW |
726 | \ |
727 | do { \ | |
728 | char raw_data[__entry_size]; \ | |
729 | struct trace_entry *ent; \ | |
730 | \ | |
1853db0e | 731 | *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \ |
f413cdb8 FW |
732 | entry = (struct ftrace_raw_##call *)raw_data; \ |
733 | ent = &entry->ent; \ | |
734 | tracing_generic_entry_update(ent, irq_flags, pc); \ | |
735 | ent->type = event_call->id; \ | |
736 | \ | |
737 | tstruct \ | |
738 | \ | |
739 | { assign; } \ | |
740 | \ | |
741 | perf_tpcounter_event(event_call->id, __addr, __count, entry,\ | |
742 | __entry_size); \ | |
743 | } while (0); \ | |
744 | \ | |
745 | } | |
746 | ||
747 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
748 | #endif /* CONFIG_EVENT_PROFILE */ | |
749 | ||
ac199db0 PZ |
750 | #undef _TRACE_PROFILE_INIT |
751 |