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 | ||
ff038f5c | 21 | /* |
091ad365 | 22 | * DECLARE_EVENT_CLASS can be used to add a generic function |
ff038f5c SR |
23 | * handlers for events. That is, if all events have the same |
24 | * parameters and just have distinct trace points. | |
25 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
091ad365 | 26 | * will map the DECLARE_EVENT_CLASS to the tracepoint. |
ff038f5c SR |
27 | * |
28 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
29 | */ | |
30 | #undef TRACE_EVENT | |
31 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
091ad365 | 32 | DECLARE_EVENT_CLASS(name, \ |
ff038f5c SR |
33 | PARAMS(proto), \ |
34 | PARAMS(args), \ | |
35 | PARAMS(tstruct), \ | |
36 | PARAMS(assign), \ | |
37 | PARAMS(print)); \ | |
38 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); | |
39 | ||
40 | ||
7fcb7c47 LZ |
41 | #undef __field |
42 | #define __field(type, item) type item; | |
43 | ||
43b51ead LZ |
44 | #undef __field_ext |
45 | #define __field_ext(type, item, filter_type) type item; | |
46 | ||
f42c85e7 SR |
47 | #undef __array |
48 | #define __array(type, item, len) type item[len]; | |
49 | ||
7fcb7c47 | 50 | #undef __dynamic_array |
7d536cb3 | 51 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
f42c85e7 | 52 | |
9cbf1176 | 53 | #undef __string |
7fcb7c47 | 54 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 55 | |
f42c85e7 SR |
56 | #undef TP_STRUCT__entry |
57 | #define TP_STRUCT__entry(args...) args | |
58 | ||
091ad365 IM |
59 | #undef DECLARE_EVENT_CLASS |
60 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ | |
ff038f5c SR |
61 | struct ftrace_raw_##name { \ |
62 | struct trace_entry ent; \ | |
63 | tstruct \ | |
64 | char __data[0]; \ | |
65 | }; | |
66 | #undef DEFINE_EVENT | |
67 | #define DEFINE_EVENT(template, name, proto, args) \ | |
f42c85e7 SR |
68 | static struct ftrace_event_call event_##name |
69 | ||
e5bc9721 SR |
70 | #undef DEFINE_EVENT_PRINT |
71 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
72 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
73 | ||
0dd7b747 FW |
74 | #undef __cpparg |
75 | #define __cpparg(arg...) arg | |
76 | ||
97419875 JS |
77 | /* Callbacks are meaningless to ftrace. */ |
78 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
79 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
80 | assign, print, reg, unreg) \ | |
81 | TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \ | |
82 | __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \ | |
97419875 | 83 | |
f42c85e7 SR |
84 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
85 | ||
9cbf1176 | 86 | |
f42c85e7 SR |
87 | /* |
88 | * Stage 2 of the trace events. | |
89 | * | |
9cbf1176 FW |
90 | * Include the following: |
91 | * | |
7fcb7c47 | 92 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
93 | * u32 <item1>; |
94 | * u32 <item2>; | |
9cbf1176 FW |
95 | * [...] |
96 | * }; | |
97 | * | |
7d536cb3 | 98 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 99 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 100 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
101 | */ |
102 | ||
7fcb7c47 | 103 | #undef __field |
43b51ead LZ |
104 | #define __field(type, item) |
105 | ||
106 | #undef __field_ext | |
107 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 108 | |
9cbf1176 FW |
109 | #undef __array |
110 | #define __array(type, item, len) | |
111 | ||
7fcb7c47 | 112 | #undef __dynamic_array |
7d536cb3 | 113 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
114 | |
115 | #undef __string | |
7fcb7c47 | 116 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 117 | |
091ad365 IM |
118 | #undef DECLARE_EVENT_CLASS |
119 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 120 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
121 | tstruct; \ |
122 | }; | |
123 | ||
ff038f5c SR |
124 | #undef DEFINE_EVENT |
125 | #define DEFINE_EVENT(template, name, proto, args) | |
126 | ||
e5bc9721 SR |
127 | #undef DEFINE_EVENT_PRINT |
128 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
129 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
130 | ||
9cbf1176 FW |
131 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
132 | ||
133 | /* | |
134 | * Stage 3 of the trace events. | |
135 | * | |
f42c85e7 SR |
136 | * Override the macros in <trace/trace_events.h> to include the following: |
137 | * | |
138 | * enum print_line_t | |
139 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
140 | * { | |
141 | * struct trace_seq *s = &iter->seq; | |
142 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
143 | * struct trace_entry *entry; | |
be74b73a | 144 | * struct trace_seq *p; |
f42c85e7 SR |
145 | * int ret; |
146 | * | |
147 | * entry = iter->ent; | |
148 | * | |
149 | * if (entry->type != event_<call>.id) { | |
150 | * WARN_ON_ONCE(1); | |
151 | * return TRACE_TYPE_UNHANDLED; | |
152 | * } | |
153 | * | |
154 | * field = (typeof(field))entry; | |
155 | * | |
be74b73a | 156 | * p = get_cpu_var(ftrace_event_seq); |
56d8bd3f | 157 | * trace_seq_init(p); |
f42c85e7 | 158 | * ret = trace_seq_printf(s, <TP_printk> "\n"); |
be74b73a | 159 | * put_cpu(); |
f42c85e7 SR |
160 | * if (!ret) |
161 | * return TRACE_TYPE_PARTIAL_LINE; | |
162 | * | |
163 | * return TRACE_TYPE_HANDLED; | |
164 | * } | |
165 | * | |
166 | * This is the method used to print the raw event to the trace | |
167 | * output format. Note, this is not needed if the data is read | |
168 | * in binary. | |
169 | */ | |
170 | ||
171 | #undef __entry | |
172 | #define __entry field | |
173 | ||
174 | #undef TP_printk | |
175 | #define TP_printk(fmt, args...) fmt "\n", args | |
176 | ||
7fcb7c47 LZ |
177 | #undef __get_dynamic_array |
178 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 179 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 180 | |
9cbf1176 | 181 | #undef __get_str |
7fcb7c47 | 182 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 183 | |
be74b73a SR |
184 | #undef __print_flags |
185 | #define __print_flags(flag, delim, flag_array...) \ | |
186 | ({ \ | |
a48f494e | 187 | static const struct trace_print_flags __flags[] = \ |
be74b73a | 188 | { flag_array, { -1, NULL }}; \ |
a48f494e | 189 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
be74b73a SR |
190 | }) |
191 | ||
0f4fc29d SR |
192 | #undef __print_symbolic |
193 | #define __print_symbolic(value, symbol_array...) \ | |
194 | ({ \ | |
195 | static const struct trace_print_flags symbols[] = \ | |
196 | { symbol_array, { -1, NULL }}; \ | |
197 | ftrace_print_symbols_seq(p, value, symbols); \ | |
198 | }) | |
199 | ||
091ad365 IM |
200 | #undef DECLARE_EVENT_CLASS |
201 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 202 | static notrace enum print_line_t \ |
ff038f5c SR |
203 | ftrace_raw_output_id_##call(int event_id, const char *name, \ |
204 | struct trace_iterator *iter, int flags) \ | |
f42c85e7 SR |
205 | { \ |
206 | struct trace_seq *s = &iter->seq; \ | |
207 | struct ftrace_raw_##call *field; \ | |
208 | struct trace_entry *entry; \ | |
be74b73a | 209 | struct trace_seq *p; \ |
f42c85e7 SR |
210 | int ret; \ |
211 | \ | |
212 | entry = iter->ent; \ | |
213 | \ | |
ff038f5c | 214 | if (entry->type != event_id) { \ |
f42c85e7 SR |
215 | WARN_ON_ONCE(1); \ |
216 | return TRACE_TYPE_UNHANDLED; \ | |
217 | } \ | |
218 | \ | |
219 | field = (typeof(field))entry; \ | |
220 | \ | |
be74b73a | 221 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 222 | trace_seq_init(p); \ |
ff038f5c SR |
223 | ret = trace_seq_printf(s, "%s: ", name); \ |
224 | if (ret) \ | |
225 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 226 | put_cpu(); \ |
f42c85e7 SR |
227 | if (!ret) \ |
228 | return TRACE_TYPE_PARTIAL_LINE; \ | |
229 | \ | |
230 | return TRACE_TYPE_HANDLED; \ | |
231 | } | |
ff038f5c SR |
232 | |
233 | #undef DEFINE_EVENT | |
234 | #define DEFINE_EVENT(template, name, proto, args) \ | |
83f0d539 | 235 | static notrace enum print_line_t \ |
ff038f5c SR |
236 | ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \ |
237 | { \ | |
238 | return ftrace_raw_output_id_##template(event_##name.id, \ | |
239 | #name, iter, flags); \ | |
240 | } | |
241 | ||
e5bc9721 SR |
242 | #undef DEFINE_EVENT_PRINT |
243 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
83f0d539 | 244 | static notrace enum print_line_t \ |
e5bc9721 SR |
245 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ |
246 | { \ | |
247 | struct trace_seq *s = &iter->seq; \ | |
248 | struct ftrace_raw_##template *field; \ | |
249 | struct trace_entry *entry; \ | |
250 | struct trace_seq *p; \ | |
f42c85e7 SR |
251 | int ret; \ |
252 | \ | |
253 | entry = iter->ent; \ | |
254 | \ | |
255 | if (entry->type != event_##call.id) { \ | |
256 | WARN_ON_ONCE(1); \ | |
257 | return TRACE_TYPE_UNHANDLED; \ | |
258 | } \ | |
259 | \ | |
260 | field = (typeof(field))entry; \ | |
261 | \ | |
be74b73a | 262 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 263 | trace_seq_init(p); \ |
e5bc9721 SR |
264 | ret = trace_seq_printf(s, "%s: ", #call); \ |
265 | if (ret) \ | |
266 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 267 | put_cpu(); \ |
f42c85e7 SR |
268 | if (!ret) \ |
269 | return TRACE_TYPE_PARTIAL_LINE; \ | |
270 | \ | |
271 | return TRACE_TYPE_HANDLED; \ | |
272 | } | |
e5bc9721 | 273 | |
f42c85e7 SR |
274 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
275 | ||
43b51ead LZ |
276 | #undef __field_ext |
277 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
278 | ret = trace_define_field(event_call, #type, #item, \ |
279 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
280 | sizeof(field.item), \ |
281 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
282 | if (ret) \ |
283 | return ret; | |
284 | ||
43b51ead LZ |
285 | #undef __field |
286 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
287 | ||
f42c85e7 SR |
288 | #undef __array |
289 | #define __array(type, item, len) \ | |
290 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
291 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
292 | offsetof(typeof(field), item), \ | |
fb7ae981 LJ |
293 | sizeof(field.item), \ |
294 | is_signed_type(type), FILTER_OTHER); \ | |
f42c85e7 SR |
295 | if (ret) \ |
296 | return ret; | |
297 | ||
7fcb7c47 LZ |
298 | #undef __dynamic_array |
299 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 300 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 301 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
302 | sizeof(field.__data_loc_##item), \ |
303 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 304 | |
9cbf1176 | 305 | #undef __string |
7fcb7c47 | 306 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 307 | |
091ad365 IM |
308 | #undef DECLARE_EVENT_CLASS |
309 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
83f0d539 | 310 | static int notrace \ |
14be96c9 | 311 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
312 | { \ |
313 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
314 | int ret; \ |
315 | \ | |
f42c85e7 SR |
316 | tstruct; \ |
317 | \ | |
318 | return ret; \ | |
319 | } | |
320 | ||
ff038f5c SR |
321 | #undef DEFINE_EVENT |
322 | #define DEFINE_EVENT(template, name, proto, args) | |
323 | ||
e5bc9721 SR |
324 | #undef DEFINE_EVENT_PRINT |
325 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
326 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
327 | ||
f42c85e7 SR |
328 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
329 | ||
7fcb7c47 LZ |
330 | /* |
331 | * remember the offset of each array from the beginning of the event. | |
332 | */ | |
333 | ||
334 | #undef __entry | |
335 | #define __entry entry | |
336 | ||
337 | #undef __field | |
338 | #define __field(type, item) | |
339 | ||
43b51ead LZ |
340 | #undef __field_ext |
341 | #define __field_ext(type, item, filter_type) | |
342 | ||
7fcb7c47 LZ |
343 | #undef __array |
344 | #define __array(type, item, len) | |
345 | ||
346 | #undef __dynamic_array | |
347 | #define __dynamic_array(type, item, len) \ | |
348 | __data_offsets->item = __data_size + \ | |
349 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 350 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
351 | __data_size += (len) * sizeof(type); |
352 | ||
353 | #undef __string | |
ff038f5c | 354 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
7fcb7c47 | 355 | |
091ad365 IM |
356 | #undef DECLARE_EVENT_CLASS |
357 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 358 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
359 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
360 | { \ | |
361 | int __data_size = 0; \ | |
362 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
363 | \ | |
364 | tstruct; \ | |
365 | \ | |
366 | return __data_size; \ | |
367 | } | |
368 | ||
ff038f5c SR |
369 | #undef DEFINE_EVENT |
370 | #define DEFINE_EVENT(template, name, proto, args) | |
371 | ||
e5bc9721 SR |
372 | #undef DEFINE_EVENT_PRINT |
373 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
374 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
375 | ||
7fcb7c47 LZ |
376 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
377 | ||
3a659305 PZ |
378 | #ifdef CONFIG_EVENT_PROFILE |
379 | ||
380 | /* | |
cdd6c482 | 381 | * Generate the functions needed for tracepoint perf_event support. |
3a659305 | 382 | * |
f413cdb8 | 383 | * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
3a659305 | 384 | * |
e5e25cf4 | 385 | * static int ftrace_profile_enable_<call>(void) |
3a659305 | 386 | * { |
e5e25cf4 | 387 | * return register_trace_<call>(ftrace_profile_<call>); |
3a659305 PZ |
388 | * } |
389 | * | |
e5e25cf4 | 390 | * static void ftrace_profile_disable_<call>(void) |
3a659305 | 391 | * { |
e5e25cf4 | 392 | * unregister_trace_<call>(ftrace_profile_<call>); |
3a659305 PZ |
393 | * } |
394 | * | |
395 | */ | |
396 | ||
091ad365 IM |
397 | #undef DECLARE_EVENT_CLASS |
398 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) | |
ff038f5c SR |
399 | |
400 | #undef DEFINE_EVENT | |
401 | #define DEFINE_EVENT(template, name, proto, args) \ | |
3a659305 | 402 | \ |
ff038f5c | 403 | static void ftrace_profile_##name(proto); \ |
3a659305 | 404 | \ |
83f0d539 SR |
405 | static notrace int \ |
406 | ftrace_profile_enable_##name(struct ftrace_event_call *unused) \ | |
3a659305 | 407 | { \ |
ff038f5c | 408 | return register_trace_##name(ftrace_profile_##name); \ |
3a659305 PZ |
409 | } \ |
410 | \ | |
83f0d539 SR |
411 | static notrace void \ |
412 | ftrace_profile_disable_##name(struct ftrace_event_call *unused) \ | |
3a659305 | 413 | { \ |
ff038f5c | 414 | unregister_trace_##name(ftrace_profile_##name); \ |
3a659305 PZ |
415 | } |
416 | ||
e5bc9721 SR |
417 | #undef DEFINE_EVENT_PRINT |
418 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
419 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
420 | ||
3a659305 PZ |
421 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
422 | ||
3a659305 PZ |
423 | #endif |
424 | ||
c32e827b | 425 | /* |
9cbf1176 | 426 | * Stage 4 of the trace events. |
c32e827b | 427 | * |
ea20d929 | 428 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b SR |
429 | * |
430 | * static void ftrace_event_<call>(proto) | |
431 | * { | |
ef18012b | 432 | * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
c32e827b SR |
433 | * } |
434 | * | |
bd1a5c84 | 435 | * static int ftrace_reg_event_<call>(struct ftrace_event_call *unused) |
c32e827b | 436 | * { |
3b8e4273 | 437 | * return register_trace_<call>(ftrace_event_<call>); |
c32e827b SR |
438 | * } |
439 | * | |
bd1a5c84 | 440 | * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused) |
c32e827b | 441 | * { |
ef18012b | 442 | * unregister_trace_<call>(ftrace_event_<call>); |
c32e827b SR |
443 | * } |
444 | * | |
c32e827b | 445 | * |
157587d7 | 446 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
447 | * |
448 | * static struct ftrace_event_call event_<call>; | |
449 | * | |
450 | * static void ftrace_raw_event_<call>(proto) | |
451 | * { | |
ef18012b SR |
452 | * struct ring_buffer_event *event; |
453 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 454 | * struct ring_buffer *buffer; |
ef18012b SR |
455 | * unsigned long irq_flags; |
456 | * int pc; | |
457 | * | |
458 | * local_save_flags(irq_flags); | |
459 | * pc = preempt_count(); | |
460 | * | |
e77405ad SR |
461 | * event = trace_current_buffer_lock_reserve(&buffer, |
462 | * event_<call>.id, | |
ef18012b SR |
463 | * sizeof(struct ftrace_raw_<call>), |
464 | * irq_flags, pc); | |
465 | * if (!event) | |
466 | * return; | |
467 | * entry = ring_buffer_event_data(event); | |
468 | * | |
469 | * <assign>; <-- Here we assign the entries by the __field and | |
0e3d0f05 | 470 | * __array macros. |
c32e827b | 471 | * |
e77405ad | 472 | * trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc); |
c32e827b SR |
473 | * } |
474 | * | |
bd1a5c84 | 475 | * static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused) |
c32e827b | 476 | * { |
ef18012b | 477 | * int ret; |
c32e827b | 478 | * |
ef18012b SR |
479 | * ret = register_trace_<call>(ftrace_raw_event_<call>); |
480 | * if (!ret) | |
481 | * pr_info("event trace: Could not activate trace point " | |
482 | * "probe to <call>"); | |
483 | * return ret; | |
c32e827b SR |
484 | * } |
485 | * | |
bd1a5c84 | 486 | * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused) |
c32e827b | 487 | * { |
ef18012b | 488 | * unregister_trace_<call>(ftrace_raw_event_<call>); |
c32e827b SR |
489 | * } |
490 | * | |
491 | * static struct trace_event ftrace_event_type_<call> = { | |
ef18012b | 492 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
493 | * }; |
494 | * | |
c32e827b SR |
495 | * static struct ftrace_event_call __used |
496 | * __attribute__((__aligned__(4))) | |
497 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 498 | * .name = "<call>", |
0e3d0f05 | 499 | * .system = "<system>", |
87d9b4e1 | 500 | * .raw_init = trace_event_raw_init, |
ef18012b SR |
501 | * .regfunc = ftrace_reg_event_<call>, |
502 | * .unregfunc = ftrace_unreg_event_<call>, | |
c32e827b SR |
503 | * } |
504 | * | |
505 | */ | |
506 | ||
ac199db0 | 507 | #ifdef CONFIG_EVENT_PROFILE |
ac199db0 PZ |
508 | |
509 | #define _TRACE_PROFILE_INIT(call) \ | |
ac199db0 PZ |
510 | .profile_enable = ftrace_profile_enable_##call, \ |
511 | .profile_disable = ftrace_profile_disable_##call, | |
512 | ||
513 | #else | |
ac199db0 PZ |
514 | #define _TRACE_PROFILE_INIT(call) |
515 | #endif | |
516 | ||
da4d0302 SR |
517 | #undef __entry |
518 | #define __entry entry | |
d20e3b03 | 519 | |
9cbf1176 FW |
520 | #undef __field |
521 | #define __field(type, item) | |
522 | ||
523 | #undef __array | |
524 | #define __array(type, item, len) | |
525 | ||
7fcb7c47 LZ |
526 | #undef __dynamic_array |
527 | #define __dynamic_array(type, item, len) \ | |
528 | __entry->__data_loc_##item = __data_offsets.item; | |
529 | ||
9cbf1176 | 530 | #undef __string |
7fcb7c47 | 531 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
532 | |
533 | #undef __assign_str | |
534 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
535 | strcpy(__get_str(dst), src); |
536 | ||
0fa0edaf LJ |
537 | #undef TP_fast_assign |
538 | #define TP_fast_assign(args...) args | |
539 | ||
540 | #undef TP_perf_assign | |
541 | #define TP_perf_assign(args...) | |
542 | ||
091ad365 IM |
543 | #undef DECLARE_EVENT_CLASS |
544 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 545 | \ |
83f0d539 SR |
546 | static notrace void \ |
547 | ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \ | |
ff038f5c | 548 | proto) \ |
c32e827b | 549 | { \ |
7fcb7c47 | 550 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
c32e827b SR |
551 | struct ring_buffer_event *event; \ |
552 | struct ftrace_raw_##call *entry; \ | |
e77405ad | 553 | struct ring_buffer *buffer; \ |
c32e827b | 554 | unsigned long irq_flags; \ |
7fcb7c47 | 555 | int __data_size; \ |
c32e827b SR |
556 | int pc; \ |
557 | \ | |
558 | local_save_flags(irq_flags); \ | |
559 | pc = preempt_count(); \ | |
560 | \ | |
7fcb7c47 | 561 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 562 | \ |
e77405ad | 563 | event = trace_current_buffer_lock_reserve(&buffer, \ |
ff038f5c | 564 | event_call->id, \ |
7fcb7c47 | 565 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 566 | irq_flags, pc); \ |
c32e827b SR |
567 | if (!event) \ |
568 | return; \ | |
569 | entry = ring_buffer_event_data(event); \ | |
570 | \ | |
7fcb7c47 LZ |
571 | \ |
572 | tstruct \ | |
573 | \ | |
a9c1c3ab | 574 | { assign; } \ |
c32e827b | 575 | \ |
e77405ad SR |
576 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
577 | trace_nowake_buffer_unlock_commit(buffer, \ | |
578 | event, irq_flags, pc); \ | |
ff038f5c SR |
579 | } |
580 | ||
581 | #undef DEFINE_EVENT | |
582 | #define DEFINE_EVENT(template, call, proto, args) \ | |
583 | \ | |
83f0d539 | 584 | static notrace void ftrace_raw_event_##call(proto) \ |
ff038f5c SR |
585 | { \ |
586 | ftrace_raw_event_id_##template(&event_##call, args); \ | |
c32e827b SR |
587 | } \ |
588 | \ | |
83f0d539 SR |
589 | static notrace int \ |
590 | ftrace_raw_reg_event_##call(struct ftrace_event_call *unused) \ | |
c32e827b | 591 | { \ |
3b8e4273 | 592 | return register_trace_##call(ftrace_raw_event_##call); \ |
c32e827b SR |
593 | } \ |
594 | \ | |
83f0d539 SR |
595 | static notrace void \ |
596 | ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused) \ | |
c32e827b SR |
597 | { \ |
598 | unregister_trace_##call(ftrace_raw_event_##call); \ | |
599 | } \ | |
600 | \ | |
601 | static struct trace_event ftrace_event_type_##call = { \ | |
602 | .trace = ftrace_raw_output_##call, \ | |
87d9b4e1 | 603 | }; |
e5bc9721 SR |
604 | |
605 | #undef DEFINE_EVENT_PRINT | |
606 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
607 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
608 | ||
609 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
610 | ||
509e760c LJ |
611 | #undef __entry |
612 | #define __entry REC | |
613 | ||
614 | #undef __print_flags | |
615 | #undef __print_symbolic | |
616 | #undef __get_dynamic_array | |
617 | #undef __get_str | |
618 | ||
619 | #undef TP_printk | |
620 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
621 | ||
091ad365 | 622 | #undef DECLARE_EVENT_CLASS |
509e760c LJ |
623 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
624 | static const char print_fmt_##call[] = print; | |
e5bc9721 SR |
625 | |
626 | #undef DEFINE_EVENT | |
627 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b SR |
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, \ |
87d9b4e1 | 635 | .raw_init = trace_event_raw_init, \ |
da4d0302 SR |
636 | .regfunc = ftrace_raw_reg_event_##call, \ |
637 | .unregfunc = ftrace_raw_unreg_event_##call, \ | |
509e760c | 638 | .print_fmt = print_fmt_##template, \ |
ff038f5c | 639 | .define_fields = ftrace_define_fields_##template, \ |
ac199db0 | 640 | _TRACE_PROFILE_INIT(call) \ |
c32e827b | 641 | } |
ac199db0 | 642 | |
e5bc9721 SR |
643 | #undef DEFINE_EVENT_PRINT |
644 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 645 | \ |
509e760c LJ |
646 | static const char print_fmt_##call[] = print; \ |
647 | \ | |
c32e827b SR |
648 | static struct ftrace_event_call __used \ |
649 | __attribute__((__aligned__(4))) \ | |
650 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 651 | .name = #call, \ |
9cc26a26 | 652 | .system = __stringify(TRACE_SYSTEM), \ |
6d723736 | 653 | .event = &ftrace_event_type_##call, \ |
87d9b4e1 | 654 | .raw_init = trace_event_raw_init, \ |
da4d0302 SR |
655 | .regfunc = ftrace_raw_reg_event_##call, \ |
656 | .unregfunc = ftrace_raw_unreg_event_##call, \ | |
509e760c | 657 | .print_fmt = print_fmt_##call, \ |
e5bc9721 | 658 | .define_fields = ftrace_define_fields_##template, \ |
ac199db0 | 659 | _TRACE_PROFILE_INIT(call) \ |
c32e827b | 660 | } |
ac199db0 | 661 | |
f42c85e7 | 662 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 663 | |
f413cdb8 FW |
664 | /* |
665 | * Define the insertion callback to profile events | |
666 | * | |
667 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
668 | * insert in the ring buffer but in a perf counter. | |
669 | * | |
670 | * static void ftrace_profile_<call>(proto) | |
671 | * { | |
672 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
673 | * struct ftrace_event_call *event_call = &event_<call>; | |
cdd6c482 | 674 | * extern void perf_tp_event(int, u64, u64, void *, int); |
f413cdb8 | 675 | * struct ftrace_raw_##call *entry; |
444a2a3b | 676 | * struct perf_trace_buf *trace_buf; |
f413cdb8 FW |
677 | * u64 __addr = 0, __count = 1; |
678 | * unsigned long irq_flags; | |
20ab4425 | 679 | * struct trace_entry *ent; |
f413cdb8 FW |
680 | * int __entry_size; |
681 | * int __data_size; | |
20ab4425 | 682 | * int __cpu |
f413cdb8 FW |
683 | * int pc; |
684 | * | |
f413cdb8 FW |
685 | * pc = preempt_count(); |
686 | * | |
687 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
688 | * |
689 | * // Below we want to get the aligned size by taking into account | |
690 | * // the u32 field that will later store the buffer size | |
691 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
692 | * sizeof(u64)); | |
693 | * __entry_size -= sizeof(u32); | |
f413cdb8 | 694 | * |
20ab4425 FW |
695 | * // Protect the non nmi buffer |
696 | * // This also protects the rcu read side | |
697 | * local_irq_save(irq_flags); | |
698 | * __cpu = smp_processor_id(); | |
699 | * | |
700 | * if (in_nmi()) | |
444a2a3b | 701 | * trace_buf = rcu_dereference(perf_trace_buf_nmi); |
20ab4425 | 702 | * else |
444a2a3b | 703 | * trace_buf = rcu_dereference(perf_trace_buf); |
20ab4425 | 704 | * |
444a2a3b | 705 | * if (!trace_buf) |
20ab4425 | 706 | * goto end; |
f413cdb8 | 707 | * |
444a2a3b FW |
708 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
709 | * | |
710 | * // Avoid recursion from perf that could mess up the buffer | |
711 | * if (trace_buf->recursion++) | |
712 | * goto end_recursion; | |
713 | * | |
714 | * raw_data = trace_buf->buf; | |
715 | * | |
716 | * // Make recursion update visible before entering perf_tp_event | |
717 | * // so that we protect from perf recursions. | |
718 | * | |
719 | * barrier(); | |
1853db0e | 720 | * |
20ab4425 FW |
721 | * //zero dead bytes from alignment to avoid stack leak to userspace: |
722 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
723 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
724 | * ent = &entry->ent; | |
725 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
726 | * ent->type = event_call->id; | |
f413cdb8 | 727 | * |
20ab4425 | 728 | * <tstruct> <- do some jobs with dynamic arrays |
f413cdb8 | 729 | * |
20ab4425 | 730 | * <assign> <- affect our values |
f413cdb8 | 731 | * |
43c1266c | 732 | * perf_tp_event(event_call->id, __addr, __count, entry, |
20ab4425 | 733 | * __entry_size); <- submit them to perf counter |
f413cdb8 FW |
734 | * |
735 | * } | |
736 | */ | |
737 | ||
738 | #ifdef CONFIG_EVENT_PROFILE | |
739 | ||
509e760c LJ |
740 | #undef __entry |
741 | #define __entry entry | |
742 | ||
743 | #undef __get_dynamic_array | |
744 | #define __get_dynamic_array(field) \ | |
745 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
746 | ||
747 | #undef __get_str | |
748 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
749 | ||
f413cdb8 FW |
750 | #undef __perf_addr |
751 | #define __perf_addr(a) __addr = (a) | |
752 | ||
753 | #undef __perf_count | |
754 | #define __perf_count(c) __count = (c) | |
755 | ||
091ad365 IM |
756 | #undef DECLARE_EVENT_CLASS |
757 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 758 | static notrace void \ |
ff038f5c SR |
759 | ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \ |
760 | proto) \ | |
f413cdb8 FW |
761 | { \ |
762 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
4ed7c92d PZ |
763 | extern int perf_swevent_get_recursion_context(void); \ |
764 | extern void perf_swevent_put_recursion_context(int rctx); \ | |
444a2a3b | 765 | extern void perf_tp_event(int, u64, u64, void *, int); \ |
f413cdb8 FW |
766 | struct ftrace_raw_##call *entry; \ |
767 | u64 __addr = 0, __count = 1; \ | |
768 | unsigned long irq_flags; \ | |
20ab4425 | 769 | struct trace_entry *ent; \ |
f413cdb8 FW |
770 | int __entry_size; \ |
771 | int __data_size; \ | |
ce71b9df | 772 | char *trace_buf; \ |
20ab4425 FW |
773 | char *raw_data; \ |
774 | int __cpu; \ | |
4ed7c92d | 775 | int rctx; \ |
f413cdb8 FW |
776 | int pc; \ |
777 | \ | |
f413cdb8 FW |
778 | pc = preempt_count(); \ |
779 | \ | |
780 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
a044560c PZ |
781 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
782 | sizeof(u64)); \ | |
304703ab | 783 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 784 | \ |
20ab4425 FW |
785 | if (WARN_ONCE(__entry_size > FTRACE_MAX_PROFILE_SIZE, \ |
786 | "profile buffer not large enough")) \ | |
787 | return; \ | |
788 | \ | |
789 | local_irq_save(irq_flags); \ | |
ce71b9df | 790 | \ |
4ed7c92d PZ |
791 | rctx = perf_swevent_get_recursion_context(); \ |
792 | if (rctx < 0) \ | |
793 | goto end_recursion; \ | |
ce71b9df | 794 | \ |
20ab4425 | 795 | __cpu = smp_processor_id(); \ |
f413cdb8 | 796 | \ |
20ab4425 | 797 | if (in_nmi()) \ |
444a2a3b | 798 | trace_buf = rcu_dereference(perf_trace_buf_nmi); \ |
20ab4425 | 799 | else \ |
444a2a3b | 800 | trace_buf = rcu_dereference(perf_trace_buf); \ |
f413cdb8 | 801 | \ |
444a2a3b | 802 | if (!trace_buf) \ |
20ab4425 | 803 | goto end; \ |
f413cdb8 | 804 | \ |
ce71b9df | 805 | raw_data = per_cpu_ptr(trace_buf, __cpu); \ |
f413cdb8 | 806 | \ |
20ab4425 FW |
807 | *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \ |
808 | entry = (struct ftrace_raw_##call *)raw_data; \ | |
809 | ent = &entry->ent; \ | |
810 | tracing_generic_entry_update(ent, irq_flags, pc); \ | |
811 | ent->type = event_call->id; \ | |
812 | \ | |
813 | tstruct \ | |
814 | \ | |
815 | { assign; } \ | |
816 | \ | |
43c1266c | 817 | perf_tp_event(event_call->id, __addr, __count, entry, \ |
f413cdb8 | 818 | __entry_size); \ |
20ab4425 FW |
819 | \ |
820 | end: \ | |
4ed7c92d PZ |
821 | perf_swevent_put_recursion_context(rctx); \ |
822 | end_recursion: \ | |
20ab4425 | 823 | local_irq_restore(irq_flags); \ |
f413cdb8 FW |
824 | } |
825 | ||
ff038f5c SR |
826 | #undef DEFINE_EVENT |
827 | #define DEFINE_EVENT(template, call, proto, args) \ | |
83f0d539 | 828 | static notrace void ftrace_profile_##call(proto) \ |
ff038f5c SR |
829 | { \ |
830 | struct ftrace_event_call *event_call = &event_##call; \ | |
831 | \ | |
832 | ftrace_profile_templ_##template(event_call, args); \ | |
833 | } | |
834 | ||
e5bc9721 SR |
835 | #undef DEFINE_EVENT_PRINT |
836 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
837 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
838 | ||
f413cdb8 FW |
839 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
840 | #endif /* CONFIG_EVENT_PROFILE */ | |
841 | ||
ac199db0 PZ |
842 | #undef _TRACE_PROFILE_INIT |
843 |