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]; \ | |
8f082018 SR |
65 | }; \ |
66 | \ | |
67 | static struct ftrace_event_class event_class_##name; | |
68 | ||
ff038f5c SR |
69 | #undef DEFINE_EVENT |
70 | #define DEFINE_EVENT(template, name, proto, args) \ | |
86c38a31 JM |
71 | static struct ftrace_event_call \ |
72 | __attribute__((__aligned__(4))) event_##name | |
f42c85e7 | 73 | |
e5bc9721 SR |
74 | #undef DEFINE_EVENT_PRINT |
75 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
76 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
77 | ||
0dd7b747 FW |
78 | #undef __cpparg |
79 | #define __cpparg(arg...) arg | |
80 | ||
97419875 JS |
81 | /* Callbacks are meaningless to ftrace. */ |
82 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
83 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
84 | assign, print, reg, unreg) \ | |
85 | TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \ | |
86 | __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \ | |
97419875 | 87 | |
f42c85e7 SR |
88 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
89 | ||
9cbf1176 | 90 | |
f42c85e7 SR |
91 | /* |
92 | * Stage 2 of the trace events. | |
93 | * | |
9cbf1176 FW |
94 | * Include the following: |
95 | * | |
7fcb7c47 | 96 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
97 | * u32 <item1>; |
98 | * u32 <item2>; | |
9cbf1176 FW |
99 | * [...] |
100 | * }; | |
101 | * | |
7d536cb3 | 102 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 103 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 104 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
105 | */ |
106 | ||
7fcb7c47 | 107 | #undef __field |
43b51ead LZ |
108 | #define __field(type, item) |
109 | ||
110 | #undef __field_ext | |
111 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 112 | |
9cbf1176 FW |
113 | #undef __array |
114 | #define __array(type, item, len) | |
115 | ||
7fcb7c47 | 116 | #undef __dynamic_array |
7d536cb3 | 117 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
118 | |
119 | #undef __string | |
7fcb7c47 | 120 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 121 | |
091ad365 IM |
122 | #undef DECLARE_EVENT_CLASS |
123 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 124 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
125 | tstruct; \ |
126 | }; | |
127 | ||
ff038f5c SR |
128 | #undef DEFINE_EVENT |
129 | #define DEFINE_EVENT(template, name, proto, args) | |
130 | ||
e5bc9721 SR |
131 | #undef DEFINE_EVENT_PRINT |
132 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
133 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
134 | ||
9cbf1176 FW |
135 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
136 | ||
137 | /* | |
138 | * Stage 3 of the trace events. | |
139 | * | |
f42c85e7 SR |
140 | * Override the macros in <trace/trace_events.h> to include the following: |
141 | * | |
142 | * enum print_line_t | |
143 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
144 | * { | |
145 | * struct trace_seq *s = &iter->seq; | |
146 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
147 | * struct trace_entry *entry; | |
be74b73a | 148 | * struct trace_seq *p; |
f42c85e7 SR |
149 | * int ret; |
150 | * | |
151 | * entry = iter->ent; | |
152 | * | |
32c0edae | 153 | * if (entry->type != event_<call>->event.type) { |
f42c85e7 SR |
154 | * WARN_ON_ONCE(1); |
155 | * return TRACE_TYPE_UNHANDLED; | |
156 | * } | |
157 | * | |
158 | * field = (typeof(field))entry; | |
159 | * | |
50354a8a | 160 | * p = &get_cpu_var(ftrace_event_seq); |
56d8bd3f | 161 | * trace_seq_init(p); |
50354a8a LZ |
162 | * ret = trace_seq_printf(s, "%s: ", <call>); |
163 | * if (ret) | |
164 | * ret = trace_seq_printf(s, <TP_printk> "\n"); | |
be74b73a | 165 | * put_cpu(); |
f42c85e7 SR |
166 | * if (!ret) |
167 | * return TRACE_TYPE_PARTIAL_LINE; | |
168 | * | |
169 | * return TRACE_TYPE_HANDLED; | |
170 | * } | |
171 | * | |
172 | * This is the method used to print the raw event to the trace | |
173 | * output format. Note, this is not needed if the data is read | |
174 | * in binary. | |
175 | */ | |
176 | ||
177 | #undef __entry | |
178 | #define __entry field | |
179 | ||
180 | #undef TP_printk | |
181 | #define TP_printk(fmt, args...) fmt "\n", args | |
182 | ||
7fcb7c47 LZ |
183 | #undef __get_dynamic_array |
184 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 185 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 186 | |
9cbf1176 | 187 | #undef __get_str |
7fcb7c47 | 188 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 189 | |
be74b73a SR |
190 | #undef __print_flags |
191 | #define __print_flags(flag, delim, flag_array...) \ | |
192 | ({ \ | |
a48f494e | 193 | static const struct trace_print_flags __flags[] = \ |
be74b73a | 194 | { flag_array, { -1, NULL }}; \ |
a48f494e | 195 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
be74b73a SR |
196 | }) |
197 | ||
0f4fc29d SR |
198 | #undef __print_symbolic |
199 | #define __print_symbolic(value, symbol_array...) \ | |
200 | ({ \ | |
201 | static const struct trace_print_flags symbols[] = \ | |
202 | { symbol_array, { -1, NULL }}; \ | |
203 | ftrace_print_symbols_seq(p, value, symbols); \ | |
204 | }) | |
205 | ||
091ad365 IM |
206 | #undef DECLARE_EVENT_CLASS |
207 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 208 | static notrace enum print_line_t \ |
80decc70 SR |
209 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
210 | struct trace_event *trace_event) \ | |
f42c85e7 | 211 | { \ |
80decc70 | 212 | struct ftrace_event_call *event; \ |
f42c85e7 SR |
213 | struct trace_seq *s = &iter->seq; \ |
214 | struct ftrace_raw_##call *field; \ | |
215 | struct trace_entry *entry; \ | |
be74b73a | 216 | struct trace_seq *p; \ |
f42c85e7 SR |
217 | int ret; \ |
218 | \ | |
80decc70 SR |
219 | event = container_of(trace_event, struct ftrace_event_call, \ |
220 | event); \ | |
221 | \ | |
f42c85e7 SR |
222 | entry = iter->ent; \ |
223 | \ | |
32c0edae | 224 | if (entry->type != event->event.type) { \ |
f42c85e7 SR |
225 | WARN_ON_ONCE(1); \ |
226 | return TRACE_TYPE_UNHANDLED; \ | |
227 | } \ | |
228 | \ | |
229 | field = (typeof(field))entry; \ | |
230 | \ | |
be74b73a | 231 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 232 | trace_seq_init(p); \ |
80decc70 | 233 | ret = trace_seq_printf(s, "%s: ", event->name); \ |
ff038f5c SR |
234 | if (ret) \ |
235 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 236 | put_cpu(); \ |
f42c85e7 SR |
237 | if (!ret) \ |
238 | return TRACE_TYPE_PARTIAL_LINE; \ | |
239 | \ | |
240 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
241 | } \ |
242 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
243 | .trace = ftrace_raw_output_##call, \ | |
244 | }; | |
ff038f5c | 245 | |
e5bc9721 SR |
246 | #undef DEFINE_EVENT_PRINT |
247 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
83f0d539 | 248 | static notrace enum print_line_t \ |
a9a57763 SR |
249 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
250 | struct trace_event *event) \ | |
e5bc9721 SR |
251 | { \ |
252 | struct trace_seq *s = &iter->seq; \ | |
253 | struct ftrace_raw_##template *field; \ | |
254 | struct trace_entry *entry; \ | |
255 | struct trace_seq *p; \ | |
f42c85e7 SR |
256 | int ret; \ |
257 | \ | |
258 | entry = iter->ent; \ | |
259 | \ | |
32c0edae | 260 | if (entry->type != event_##call.event.type) { \ |
f42c85e7 SR |
261 | WARN_ON_ONCE(1); \ |
262 | return TRACE_TYPE_UNHANDLED; \ | |
263 | } \ | |
264 | \ | |
265 | field = (typeof(field))entry; \ | |
266 | \ | |
be74b73a | 267 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 268 | trace_seq_init(p); \ |
e5bc9721 SR |
269 | ret = trace_seq_printf(s, "%s: ", #call); \ |
270 | if (ret) \ | |
271 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 272 | put_cpu(); \ |
f42c85e7 SR |
273 | if (!ret) \ |
274 | return TRACE_TYPE_PARTIAL_LINE; \ | |
275 | \ | |
276 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
277 | } \ |
278 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
279 | .trace = ftrace_raw_output_##call, \ | |
280 | }; | |
e5bc9721 | 281 | |
f42c85e7 SR |
282 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
283 | ||
43b51ead LZ |
284 | #undef __field_ext |
285 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
286 | ret = trace_define_field(event_call, #type, #item, \ |
287 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
288 | sizeof(field.item), \ |
289 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
290 | if (ret) \ |
291 | return ret; | |
292 | ||
43b51ead LZ |
293 | #undef __field |
294 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
295 | ||
f42c85e7 SR |
296 | #undef __array |
297 | #define __array(type, item, len) \ | |
298 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
299 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
300 | offsetof(typeof(field), item), \ | |
fb7ae981 LJ |
301 | sizeof(field.item), \ |
302 | is_signed_type(type), FILTER_OTHER); \ | |
f42c85e7 SR |
303 | if (ret) \ |
304 | return ret; | |
305 | ||
7fcb7c47 LZ |
306 | #undef __dynamic_array |
307 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 308 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 309 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
310 | sizeof(field.__data_loc_##item), \ |
311 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 312 | |
9cbf1176 | 313 | #undef __string |
7fcb7c47 | 314 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 315 | |
091ad365 IM |
316 | #undef DECLARE_EVENT_CLASS |
317 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
83f0d539 | 318 | static int notrace \ |
14be96c9 | 319 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
320 | { \ |
321 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
322 | int ret; \ |
323 | \ | |
f42c85e7 SR |
324 | tstruct; \ |
325 | \ | |
326 | return ret; \ | |
327 | } | |
328 | ||
ff038f5c SR |
329 | #undef DEFINE_EVENT |
330 | #define DEFINE_EVENT(template, name, proto, args) | |
331 | ||
e5bc9721 SR |
332 | #undef DEFINE_EVENT_PRINT |
333 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
334 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
335 | ||
f42c85e7 SR |
336 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
337 | ||
7fcb7c47 LZ |
338 | /* |
339 | * remember the offset of each array from the beginning of the event. | |
340 | */ | |
341 | ||
342 | #undef __entry | |
343 | #define __entry entry | |
344 | ||
345 | #undef __field | |
346 | #define __field(type, item) | |
347 | ||
43b51ead LZ |
348 | #undef __field_ext |
349 | #define __field_ext(type, item, filter_type) | |
350 | ||
7fcb7c47 LZ |
351 | #undef __array |
352 | #define __array(type, item, len) | |
353 | ||
354 | #undef __dynamic_array | |
355 | #define __dynamic_array(type, item, len) \ | |
356 | __data_offsets->item = __data_size + \ | |
357 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 358 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
359 | __data_size += (len) * sizeof(type); |
360 | ||
361 | #undef __string | |
ff038f5c | 362 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
7fcb7c47 | 363 | |
091ad365 IM |
364 | #undef DECLARE_EVENT_CLASS |
365 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 366 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
367 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
368 | { \ | |
369 | int __data_size = 0; \ | |
370 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
371 | \ | |
372 | tstruct; \ | |
373 | \ | |
374 | return __data_size; \ | |
375 | } | |
376 | ||
ff038f5c SR |
377 | #undef DEFINE_EVENT |
378 | #define DEFINE_EVENT(template, name, proto, args) | |
379 | ||
e5bc9721 SR |
380 | #undef DEFINE_EVENT_PRINT |
381 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
382 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
383 | ||
7fcb7c47 LZ |
384 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
385 | ||
c32e827b | 386 | /* |
9cbf1176 | 387 | * Stage 4 of the trace events. |
c32e827b | 388 | * |
ea20d929 | 389 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b | 390 | * |
157587d7 | 391 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
392 | * |
393 | * static struct ftrace_event_call event_<call>; | |
394 | * | |
2239291a | 395 | * static void ftrace_raw_event_<call>(void *__data, proto) |
c32e827b | 396 | * { |
2239291a | 397 | * struct ftrace_event_call *event_call = __data; |
50354a8a | 398 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
ef18012b SR |
399 | * struct ring_buffer_event *event; |
400 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 401 | * struct ring_buffer *buffer; |
ef18012b | 402 | * unsigned long irq_flags; |
50354a8a | 403 | * int __data_size; |
ef18012b SR |
404 | * int pc; |
405 | * | |
406 | * local_save_flags(irq_flags); | |
407 | * pc = preempt_count(); | |
408 | * | |
50354a8a LZ |
409 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
410 | * | |
e77405ad | 411 | * event = trace_current_buffer_lock_reserve(&buffer, |
32c0edae | 412 | * event_<call>->event.type, |
50354a8a | 413 | * sizeof(*entry) + __data_size, |
ef18012b SR |
414 | * irq_flags, pc); |
415 | * if (!event) | |
416 | * return; | |
417 | * entry = ring_buffer_event_data(event); | |
418 | * | |
50354a8a LZ |
419 | * { <assign>; } <-- Here we assign the entries by the __field and |
420 | * __array macros. | |
c32e827b | 421 | * |
50354a8a LZ |
422 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) |
423 | * trace_current_buffer_unlock_commit(buffer, | |
424 | * event, irq_flags, pc); | |
c32e827b SR |
425 | * } |
426 | * | |
c32e827b | 427 | * static struct trace_event ftrace_event_type_<call> = { |
ef18012b | 428 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
429 | * }; |
430 | * | |
50354a8a LZ |
431 | * static const char print_fmt_<call>[] = <TP_printk>; |
432 | * | |
8f082018 SR |
433 | * static struct ftrace_event_class __used event_class_<template> = { |
434 | * .system = "<system>", | |
2e33af02 | 435 | * .define_fields = ftrace_define_fields_<call>, |
0405ab80 SR |
436 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
437 | * .raw_init = trace_event_raw_init, | |
438 | * .probe = ftrace_raw_event_##call, | |
8f082018 SR |
439 | * }; |
440 | * | |
c32e827b SR |
441 | * static struct ftrace_event_call __used |
442 | * __attribute__((__aligned__(4))) | |
443 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 444 | * .name = "<call>", |
8f082018 | 445 | * .class = event_class_<template>, |
2e33af02 | 446 | * .event = &ftrace_event_type_<call>, |
50354a8a | 447 | * .print_fmt = print_fmt_<call>, |
8f082018 | 448 | * }; |
c32e827b SR |
449 | * |
450 | */ | |
451 | ||
07b139c8 | 452 | #ifdef CONFIG_PERF_EVENTS |
ac199db0 | 453 | |
2239291a SR |
454 | #define _TRACE_PERF_PROTO(call, proto) \ |
455 | static notrace void \ | |
456 | perf_trace_##call(void *__data, proto); | |
457 | ||
97d5a220 | 458 | #define _TRACE_PERF_INIT(call) \ |
2239291a | 459 | .perf_probe = perf_trace_##call, |
ac199db0 PZ |
460 | |
461 | #else | |
2239291a | 462 | #define _TRACE_PERF_PROTO(call, proto) |
97d5a220 | 463 | #define _TRACE_PERF_INIT(call) |
07b139c8 | 464 | #endif /* CONFIG_PERF_EVENTS */ |
ac199db0 | 465 | |
da4d0302 SR |
466 | #undef __entry |
467 | #define __entry entry | |
d20e3b03 | 468 | |
9cbf1176 FW |
469 | #undef __field |
470 | #define __field(type, item) | |
471 | ||
472 | #undef __array | |
473 | #define __array(type, item, len) | |
474 | ||
7fcb7c47 LZ |
475 | #undef __dynamic_array |
476 | #define __dynamic_array(type, item, len) \ | |
477 | __entry->__data_loc_##item = __data_offsets.item; | |
478 | ||
9cbf1176 | 479 | #undef __string |
7fcb7c47 | 480 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
481 | |
482 | #undef __assign_str | |
483 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
484 | strcpy(__get_str(dst), src); |
485 | ||
0fa0edaf LJ |
486 | #undef TP_fast_assign |
487 | #define TP_fast_assign(args...) args | |
488 | ||
489 | #undef TP_perf_assign | |
490 | #define TP_perf_assign(args...) | |
491 | ||
091ad365 IM |
492 | #undef DECLARE_EVENT_CLASS |
493 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 494 | \ |
83f0d539 | 495 | static notrace void \ |
2239291a | 496 | ftrace_raw_event_##call(void *__data, proto) \ |
c32e827b | 497 | { \ |
2239291a | 498 | struct ftrace_event_call *event_call = __data; \ |
7fcb7c47 | 499 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
c32e827b SR |
500 | struct ring_buffer_event *event; \ |
501 | struct ftrace_raw_##call *entry; \ | |
e77405ad | 502 | struct ring_buffer *buffer; \ |
c32e827b | 503 | unsigned long irq_flags; \ |
7fcb7c47 | 504 | int __data_size; \ |
c32e827b SR |
505 | int pc; \ |
506 | \ | |
507 | local_save_flags(irq_flags); \ | |
508 | pc = preempt_count(); \ | |
509 | \ | |
7fcb7c47 | 510 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 511 | \ |
e77405ad | 512 | event = trace_current_buffer_lock_reserve(&buffer, \ |
32c0edae | 513 | event_call->event.type, \ |
7fcb7c47 | 514 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 515 | irq_flags, pc); \ |
c32e827b SR |
516 | if (!event) \ |
517 | return; \ | |
518 | entry = ring_buffer_event_data(event); \ | |
519 | \ | |
7fcb7c47 LZ |
520 | tstruct \ |
521 | \ | |
a9c1c3ab | 522 | { assign; } \ |
c32e827b | 523 | \ |
e77405ad SR |
524 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
525 | trace_nowake_buffer_unlock_commit(buffer, \ | |
526 | event, irq_flags, pc); \ | |
ff038f5c | 527 | } |
2239291a SR |
528 | /* |
529 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
530 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
531 | * fail to compile unless it too is updated. | |
532 | */ | |
ff038f5c SR |
533 | |
534 | #undef DEFINE_EVENT | |
535 | #define DEFINE_EVENT(template, call, proto, args) \ | |
2239291a SR |
536 | static inline void ftrace_test_probe_##call(void) \ |
537 | { \ | |
538 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ | |
539 | } | |
e5bc9721 SR |
540 | |
541 | #undef DEFINE_EVENT_PRINT | |
80decc70 | 542 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
e5bc9721 SR |
543 | |
544 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
545 | ||
509e760c LJ |
546 | #undef __entry |
547 | #define __entry REC | |
548 | ||
549 | #undef __print_flags | |
550 | #undef __print_symbolic | |
551 | #undef __get_dynamic_array | |
552 | #undef __get_str | |
553 | ||
554 | #undef TP_printk | |
555 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
556 | ||
091ad365 | 557 | #undef DECLARE_EVENT_CLASS |
509e760c | 558 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
2239291a | 559 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
8f082018 SR |
560 | static const char print_fmt_##call[] = print; \ |
561 | static struct ftrace_event_class __used event_class_##call = { \ | |
2239291a | 562 | .system = __stringify(TRACE_SYSTEM), \ |
2e33af02 SR |
563 | .define_fields = ftrace_define_fields_##call, \ |
564 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
0405ab80 | 565 | .raw_init = trace_event_raw_init, \ |
2239291a SR |
566 | .probe = ftrace_raw_event_##call, \ |
567 | _TRACE_PERF_INIT(call) \ | |
8f082018 | 568 | }; |
e5bc9721 SR |
569 | |
570 | #undef DEFINE_EVENT | |
571 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b SR |
572 | \ |
573 | static struct ftrace_event_call __used \ | |
574 | __attribute__((__aligned__(4))) \ | |
575 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 576 | .name = #call, \ |
8f082018 | 577 | .class = &event_class_##template, \ |
80decc70 | 578 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
509e760c | 579 | .print_fmt = print_fmt_##template, \ |
8f082018 | 580 | }; |
ac199db0 | 581 | |
e5bc9721 SR |
582 | #undef DEFINE_EVENT_PRINT |
583 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 584 | \ |
509e760c LJ |
585 | static const char print_fmt_##call[] = print; \ |
586 | \ | |
c32e827b SR |
587 | static struct ftrace_event_call __used \ |
588 | __attribute__((__aligned__(4))) \ | |
589 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 590 | .name = #call, \ |
8f082018 | 591 | .class = &event_class_##template, \ |
80decc70 | 592 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
509e760c | 593 | .print_fmt = print_fmt_##call, \ |
c32e827b | 594 | } |
ac199db0 | 595 | |
f42c85e7 | 596 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 597 | |
f413cdb8 | 598 | /* |
97d5a220 | 599 | * Define the insertion callback to perf events |
f413cdb8 FW |
600 | * |
601 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
602 | * insert in the ring buffer but in a perf counter. | |
603 | * | |
97d5a220 | 604 | * static void ftrace_perf_<call>(proto) |
f413cdb8 FW |
605 | * { |
606 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
607 | * struct ftrace_event_call *event_call = &event_<call>; | |
cdd6c482 | 608 | * extern void perf_tp_event(int, u64, u64, void *, int); |
f413cdb8 | 609 | * struct ftrace_raw_##call *entry; |
444a2a3b | 610 | * struct perf_trace_buf *trace_buf; |
f413cdb8 FW |
611 | * u64 __addr = 0, __count = 1; |
612 | * unsigned long irq_flags; | |
20ab4425 | 613 | * struct trace_entry *ent; |
f413cdb8 FW |
614 | * int __entry_size; |
615 | * int __data_size; | |
20ab4425 | 616 | * int __cpu |
f413cdb8 FW |
617 | * int pc; |
618 | * | |
f413cdb8 FW |
619 | * pc = preempt_count(); |
620 | * | |
621 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
622 | * |
623 | * // Below we want to get the aligned size by taking into account | |
624 | * // the u32 field that will later store the buffer size | |
625 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
626 | * sizeof(u64)); | |
627 | * __entry_size -= sizeof(u32); | |
f413cdb8 | 628 | * |
20ab4425 FW |
629 | * // Protect the non nmi buffer |
630 | * // This also protects the rcu read side | |
631 | * local_irq_save(irq_flags); | |
632 | * __cpu = smp_processor_id(); | |
633 | * | |
634 | * if (in_nmi()) | |
8d53dd54 | 635 | * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); |
20ab4425 | 636 | * else |
8d53dd54 | 637 | * trace_buf = rcu_dereference_sched(perf_trace_buf); |
20ab4425 | 638 | * |
444a2a3b | 639 | * if (!trace_buf) |
20ab4425 | 640 | * goto end; |
f413cdb8 | 641 | * |
444a2a3b FW |
642 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
643 | * | |
644 | * // Avoid recursion from perf that could mess up the buffer | |
645 | * if (trace_buf->recursion++) | |
646 | * goto end_recursion; | |
647 | * | |
648 | * raw_data = trace_buf->buf; | |
649 | * | |
650 | * // Make recursion update visible before entering perf_tp_event | |
651 | * // so that we protect from perf recursions. | |
652 | * | |
653 | * barrier(); | |
1853db0e | 654 | * |
20ab4425 FW |
655 | * //zero dead bytes from alignment to avoid stack leak to userspace: |
656 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
657 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
658 | * ent = &entry->ent; | |
659 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
660 | * ent->type = event_call->id; | |
f413cdb8 | 661 | * |
20ab4425 | 662 | * <tstruct> <- do some jobs with dynamic arrays |
f413cdb8 | 663 | * |
20ab4425 | 664 | * <assign> <- affect our values |
f413cdb8 | 665 | * |
43c1266c | 666 | * perf_tp_event(event_call->id, __addr, __count, entry, |
20ab4425 | 667 | * __entry_size); <- submit them to perf counter |
f413cdb8 FW |
668 | * |
669 | * } | |
670 | */ | |
671 | ||
07b139c8 | 672 | #ifdef CONFIG_PERF_EVENTS |
f413cdb8 | 673 | |
509e760c LJ |
674 | #undef __entry |
675 | #define __entry entry | |
676 | ||
677 | #undef __get_dynamic_array | |
678 | #define __get_dynamic_array(field) \ | |
679 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
680 | ||
681 | #undef __get_str | |
682 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
683 | ||
f413cdb8 FW |
684 | #undef __perf_addr |
685 | #define __perf_addr(a) __addr = (a) | |
686 | ||
687 | #undef __perf_count | |
688 | #define __perf_count(c) __count = (c) | |
689 | ||
091ad365 IM |
690 | #undef DECLARE_EVENT_CLASS |
691 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 692 | static notrace void \ |
2239291a | 693 | perf_trace_##call(void *__data, proto) \ |
f413cdb8 | 694 | { \ |
2239291a | 695 | struct ftrace_event_call *event_call = __data; \ |
f413cdb8 | 696 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f413cdb8 | 697 | struct ftrace_raw_##call *entry; \ |
ff5f149b | 698 | struct pt_regs __regs; \ |
f413cdb8 | 699 | u64 __addr = 0, __count = 1; \ |
1c024eca | 700 | struct hlist_head *head; \ |
f413cdb8 FW |
701 | int __entry_size; \ |
702 | int __data_size; \ | |
4ed7c92d | 703 | int rctx; \ |
f413cdb8 | 704 | \ |
ff5f149b | 705 | perf_fetch_caller_regs(&__regs, 1); \ |
f0218b3e | 706 | \ |
f413cdb8 | 707 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
a044560c PZ |
708 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
709 | sizeof(u64)); \ | |
304703ab | 710 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 711 | \ |
97d5a220 | 712 | if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ |
20ab4425 FW |
713 | "profile buffer not large enough")) \ |
714 | return; \ | |
b7e2ecef | 715 | \ |
97d5a220 | 716 | entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ |
ff5f149b | 717 | __entry_size, event_call->event.type, &__regs, &rctx); \ |
430ad5a6 XG |
718 | if (!entry) \ |
719 | return; \ | |
b7e2ecef | 720 | \ |
20ab4425 FW |
721 | tstruct \ |
722 | \ | |
723 | { assign; } \ | |
724 | \ | |
1c024eca | 725 | head = per_cpu_ptr(event_call->perf_events, smp_processor_id());\ |
97d5a220 | 726 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
ff5f149b | 727 | __count, &__regs, head); \ |
f413cdb8 FW |
728 | } |
729 | ||
2239291a SR |
730 | /* |
731 | * This part is compiled out, it is only here as a build time check | |
732 | * to make sure that if the tracepoint handling changes, the | |
733 | * perf probe will fail to compile unless it too is updated. | |
734 | */ | |
ff038f5c | 735 | #undef DEFINE_EVENT |
2239291a SR |
736 | #define DEFINE_EVENT(template, call, proto, args) \ |
737 | static inline void perf_test_probe_##call(void) \ | |
738 | { \ | |
739 | check_trace_callback_type_##call(perf_trace_##template); \ | |
ff038f5c SR |
740 | } |
741 | ||
2239291a | 742 | |
e5bc9721 SR |
743 | #undef DEFINE_EVENT_PRINT |
744 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
745 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
746 | ||
f413cdb8 | 747 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
07b139c8 | 748 | #endif /* CONFIG_PERF_EVENTS */ |
f413cdb8 | 749 | |
ac199db0 PZ |
750 | #undef _TRACE_PROFILE_INIT |
751 |