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) \ | |
49c17746 | 71 | static struct ftrace_event_call __used \ |
86c38a31 | 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 | ||
5a2e3995 KT |
206 | #undef __print_hex |
207 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) | |
208 | ||
091ad365 IM |
209 | #undef DECLARE_EVENT_CLASS |
210 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 211 | static notrace enum print_line_t \ |
80decc70 SR |
212 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
213 | struct trace_event *trace_event) \ | |
f42c85e7 | 214 | { \ |
80decc70 | 215 | struct ftrace_event_call *event; \ |
f42c85e7 SR |
216 | struct trace_seq *s = &iter->seq; \ |
217 | struct ftrace_raw_##call *field; \ | |
218 | struct trace_entry *entry; \ | |
be74b73a | 219 | struct trace_seq *p; \ |
f42c85e7 SR |
220 | int ret; \ |
221 | \ | |
80decc70 SR |
222 | event = container_of(trace_event, struct ftrace_event_call, \ |
223 | event); \ | |
224 | \ | |
f42c85e7 SR |
225 | entry = iter->ent; \ |
226 | \ | |
32c0edae | 227 | if (entry->type != event->event.type) { \ |
f42c85e7 SR |
228 | WARN_ON_ONCE(1); \ |
229 | return TRACE_TYPE_UNHANDLED; \ | |
230 | } \ | |
231 | \ | |
232 | field = (typeof(field))entry; \ | |
233 | \ | |
be74b73a | 234 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 235 | trace_seq_init(p); \ |
80decc70 | 236 | ret = trace_seq_printf(s, "%s: ", event->name); \ |
ff038f5c SR |
237 | if (ret) \ |
238 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 239 | put_cpu(); \ |
f42c85e7 SR |
240 | if (!ret) \ |
241 | return TRACE_TYPE_PARTIAL_LINE; \ | |
242 | \ | |
243 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
244 | } \ |
245 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
246 | .trace = ftrace_raw_output_##call, \ | |
247 | }; | |
ff038f5c | 248 | |
e5bc9721 SR |
249 | #undef DEFINE_EVENT_PRINT |
250 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
83f0d539 | 251 | static notrace enum print_line_t \ |
a9a57763 SR |
252 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
253 | struct trace_event *event) \ | |
e5bc9721 SR |
254 | { \ |
255 | struct trace_seq *s = &iter->seq; \ | |
256 | struct ftrace_raw_##template *field; \ | |
257 | struct trace_entry *entry; \ | |
258 | struct trace_seq *p; \ | |
f42c85e7 SR |
259 | int ret; \ |
260 | \ | |
261 | entry = iter->ent; \ | |
262 | \ | |
32c0edae | 263 | if (entry->type != event_##call.event.type) { \ |
f42c85e7 SR |
264 | WARN_ON_ONCE(1); \ |
265 | return TRACE_TYPE_UNHANDLED; \ | |
266 | } \ | |
267 | \ | |
268 | field = (typeof(field))entry; \ | |
269 | \ | |
be74b73a | 270 | p = &get_cpu_var(ftrace_event_seq); \ |
56d8bd3f | 271 | trace_seq_init(p); \ |
e5bc9721 SR |
272 | ret = trace_seq_printf(s, "%s: ", #call); \ |
273 | if (ret) \ | |
274 | ret = trace_seq_printf(s, print); \ | |
be74b73a | 275 | put_cpu(); \ |
f42c85e7 SR |
276 | if (!ret) \ |
277 | return TRACE_TYPE_PARTIAL_LINE; \ | |
278 | \ | |
279 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
280 | } \ |
281 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
282 | .trace = ftrace_raw_output_##call, \ | |
283 | }; | |
e5bc9721 | 284 | |
f42c85e7 SR |
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), \ | |
fb7ae981 LJ |
304 | sizeof(field.item), \ |
305 | is_signed_type(type), FILTER_OTHER); \ | |
f42c85e7 SR |
306 | if (ret) \ |
307 | return ret; | |
308 | ||
7fcb7c47 LZ |
309 | #undef __dynamic_array |
310 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 311 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 312 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
313 | sizeof(field.__data_loc_##item), \ |
314 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 315 | |
9cbf1176 | 316 | #undef __string |
7fcb7c47 | 317 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 318 | |
091ad365 IM |
319 | #undef DECLARE_EVENT_CLASS |
320 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
83f0d539 | 321 | static int notrace \ |
14be96c9 | 322 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
323 | { \ |
324 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
325 | int ret; \ |
326 | \ | |
f42c85e7 SR |
327 | tstruct; \ |
328 | \ | |
329 | return ret; \ | |
330 | } | |
331 | ||
ff038f5c SR |
332 | #undef DEFINE_EVENT |
333 | #define DEFINE_EVENT(template, name, proto, args) | |
334 | ||
e5bc9721 SR |
335 | #undef DEFINE_EVENT_PRINT |
336 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
337 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
338 | ||
f42c85e7 SR |
339 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
340 | ||
7fcb7c47 LZ |
341 | /* |
342 | * remember the offset of each array from the beginning of the event. | |
343 | */ | |
344 | ||
345 | #undef __entry | |
346 | #define __entry entry | |
347 | ||
348 | #undef __field | |
349 | #define __field(type, item) | |
350 | ||
43b51ead LZ |
351 | #undef __field_ext |
352 | #define __field_ext(type, item, filter_type) | |
353 | ||
7fcb7c47 LZ |
354 | #undef __array |
355 | #define __array(type, item, len) | |
356 | ||
357 | #undef __dynamic_array | |
358 | #define __dynamic_array(type, item, len) \ | |
359 | __data_offsets->item = __data_size + \ | |
360 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 361 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
362 | __data_size += (len) * sizeof(type); |
363 | ||
364 | #undef __string | |
ff038f5c | 365 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
7fcb7c47 | 366 | |
091ad365 IM |
367 | #undef DECLARE_EVENT_CLASS |
368 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 369 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
370 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
371 | { \ | |
372 | int __data_size = 0; \ | |
373 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
374 | \ | |
375 | tstruct; \ | |
376 | \ | |
377 | return __data_size; \ | |
378 | } | |
379 | ||
ff038f5c SR |
380 | #undef DEFINE_EVENT |
381 | #define DEFINE_EVENT(template, name, proto, args) | |
382 | ||
e5bc9721 SR |
383 | #undef DEFINE_EVENT_PRINT |
384 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
385 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
386 | ||
7fcb7c47 LZ |
387 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
388 | ||
c32e827b | 389 | /* |
9cbf1176 | 390 | * Stage 4 of the trace events. |
c32e827b | 391 | * |
ea20d929 | 392 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b | 393 | * |
157587d7 | 394 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
395 | * |
396 | * static struct ftrace_event_call event_<call>; | |
397 | * | |
2239291a | 398 | * static void ftrace_raw_event_<call>(void *__data, proto) |
c32e827b | 399 | * { |
2239291a | 400 | * struct ftrace_event_call *event_call = __data; |
50354a8a | 401 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
ef18012b SR |
402 | * struct ring_buffer_event *event; |
403 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 404 | * struct ring_buffer *buffer; |
ef18012b | 405 | * unsigned long irq_flags; |
50354a8a | 406 | * int __data_size; |
ef18012b SR |
407 | * int pc; |
408 | * | |
409 | * local_save_flags(irq_flags); | |
410 | * pc = preempt_count(); | |
411 | * | |
50354a8a LZ |
412 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
413 | * | |
e77405ad | 414 | * event = trace_current_buffer_lock_reserve(&buffer, |
32c0edae | 415 | * event_<call>->event.type, |
50354a8a | 416 | * sizeof(*entry) + __data_size, |
ef18012b SR |
417 | * irq_flags, pc); |
418 | * if (!event) | |
419 | * return; | |
420 | * entry = ring_buffer_event_data(event); | |
421 | * | |
50354a8a LZ |
422 | * { <assign>; } <-- Here we assign the entries by the __field and |
423 | * __array macros. | |
c32e827b | 424 | * |
50354a8a LZ |
425 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) |
426 | * trace_current_buffer_unlock_commit(buffer, | |
427 | * event, irq_flags, pc); | |
c32e827b SR |
428 | * } |
429 | * | |
c32e827b | 430 | * static struct trace_event ftrace_event_type_<call> = { |
ef18012b | 431 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
432 | * }; |
433 | * | |
50354a8a LZ |
434 | * static const char print_fmt_<call>[] = <TP_printk>; |
435 | * | |
8f082018 SR |
436 | * static struct ftrace_event_class __used event_class_<template> = { |
437 | * .system = "<system>", | |
2e33af02 | 438 | * .define_fields = ftrace_define_fields_<call>, |
0405ab80 SR |
439 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
440 | * .raw_init = trace_event_raw_init, | |
441 | * .probe = ftrace_raw_event_##call, | |
8f082018 SR |
442 | * }; |
443 | * | |
c32e827b SR |
444 | * static struct ftrace_event_call __used |
445 | * __attribute__((__aligned__(4))) | |
446 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 447 | * .name = "<call>", |
8f082018 | 448 | * .class = event_class_<template>, |
2e33af02 | 449 | * .event = &ftrace_event_type_<call>, |
50354a8a | 450 | * .print_fmt = print_fmt_<call>, |
8f082018 | 451 | * }; |
c32e827b SR |
452 | * |
453 | */ | |
454 | ||
07b139c8 | 455 | #ifdef CONFIG_PERF_EVENTS |
ac199db0 | 456 | |
2239291a SR |
457 | #define _TRACE_PERF_PROTO(call, proto) \ |
458 | static notrace void \ | |
459 | perf_trace_##call(void *__data, proto); | |
460 | ||
97d5a220 | 461 | #define _TRACE_PERF_INIT(call) \ |
2239291a | 462 | .perf_probe = perf_trace_##call, |
ac199db0 PZ |
463 | |
464 | #else | |
2239291a | 465 | #define _TRACE_PERF_PROTO(call, proto) |
97d5a220 | 466 | #define _TRACE_PERF_INIT(call) |
07b139c8 | 467 | #endif /* CONFIG_PERF_EVENTS */ |
ac199db0 | 468 | |
da4d0302 SR |
469 | #undef __entry |
470 | #define __entry entry | |
d20e3b03 | 471 | |
9cbf1176 FW |
472 | #undef __field |
473 | #define __field(type, item) | |
474 | ||
475 | #undef __array | |
476 | #define __array(type, item, len) | |
477 | ||
7fcb7c47 LZ |
478 | #undef __dynamic_array |
479 | #define __dynamic_array(type, item, len) \ | |
480 | __entry->__data_loc_##item = __data_offsets.item; | |
481 | ||
9cbf1176 | 482 | #undef __string |
7fcb7c47 | 483 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
484 | |
485 | #undef __assign_str | |
486 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
487 | strcpy(__get_str(dst), src); |
488 | ||
0fa0edaf LJ |
489 | #undef TP_fast_assign |
490 | #define TP_fast_assign(args...) args | |
491 | ||
492 | #undef TP_perf_assign | |
493 | #define TP_perf_assign(args...) | |
494 | ||
091ad365 IM |
495 | #undef DECLARE_EVENT_CLASS |
496 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 497 | \ |
83f0d539 | 498 | static notrace void \ |
2239291a | 499 | ftrace_raw_event_##call(void *__data, proto) \ |
c32e827b | 500 | { \ |
2239291a | 501 | struct ftrace_event_call *event_call = __data; \ |
7fcb7c47 | 502 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
c32e827b SR |
503 | struct ring_buffer_event *event; \ |
504 | struct ftrace_raw_##call *entry; \ | |
e77405ad | 505 | struct ring_buffer *buffer; \ |
c32e827b | 506 | unsigned long irq_flags; \ |
7fcb7c47 | 507 | int __data_size; \ |
c32e827b SR |
508 | int pc; \ |
509 | \ | |
510 | local_save_flags(irq_flags); \ | |
511 | pc = preempt_count(); \ | |
512 | \ | |
7fcb7c47 | 513 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 514 | \ |
e77405ad | 515 | event = trace_current_buffer_lock_reserve(&buffer, \ |
32c0edae | 516 | event_call->event.type, \ |
7fcb7c47 | 517 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 518 | irq_flags, pc); \ |
c32e827b SR |
519 | if (!event) \ |
520 | return; \ | |
521 | entry = ring_buffer_event_data(event); \ | |
522 | \ | |
7fcb7c47 LZ |
523 | tstruct \ |
524 | \ | |
a9c1c3ab | 525 | { assign; } \ |
c32e827b | 526 | \ |
e77405ad SR |
527 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
528 | trace_nowake_buffer_unlock_commit(buffer, \ | |
529 | event, irq_flags, pc); \ | |
ff038f5c | 530 | } |
2239291a SR |
531 | /* |
532 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
533 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
534 | * fail to compile unless it too is updated. | |
535 | */ | |
ff038f5c SR |
536 | |
537 | #undef DEFINE_EVENT | |
538 | #define DEFINE_EVENT(template, call, proto, args) \ | |
2239291a | 539 | static inline void ftrace_test_probe_##call(void) \ |
c32e827b | 540 | { \ |
2239291a SR |
541 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ |
542 | } | |
e5bc9721 SR |
543 | |
544 | #undef DEFINE_EVENT_PRINT | |
80decc70 | 545 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
e5bc9721 SR |
546 | |
547 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
548 | ||
509e760c LJ |
549 | #undef __entry |
550 | #define __entry REC | |
551 | ||
552 | #undef __print_flags | |
553 | #undef __print_symbolic | |
554 | #undef __get_dynamic_array | |
555 | #undef __get_str | |
556 | ||
557 | #undef TP_printk | |
558 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
559 | ||
091ad365 | 560 | #undef DECLARE_EVENT_CLASS |
509e760c | 561 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
2239291a | 562 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
8f082018 SR |
563 | static const char print_fmt_##call[] = print; \ |
564 | static struct ftrace_event_class __used event_class_##call = { \ | |
2239291a | 565 | .system = __stringify(TRACE_SYSTEM), \ |
2e33af02 SR |
566 | .define_fields = ftrace_define_fields_##call, \ |
567 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
0405ab80 | 568 | .raw_init = trace_event_raw_init, \ |
2239291a SR |
569 | .probe = ftrace_raw_event_##call, \ |
570 | _TRACE_PERF_INIT(call) \ | |
8f082018 | 571 | }; |
e5bc9721 SR |
572 | |
573 | #undef DEFINE_EVENT | |
574 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b SR |
575 | \ |
576 | static struct ftrace_event_call __used \ | |
577 | __attribute__((__aligned__(4))) \ | |
578 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 579 | .name = #call, \ |
8f082018 | 580 | .class = &event_class_##template, \ |
80decc70 | 581 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
509e760c | 582 | .print_fmt = print_fmt_##template, \ |
8f082018 | 583 | }; |
ac199db0 | 584 | |
e5bc9721 SR |
585 | #undef DEFINE_EVENT_PRINT |
586 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 587 | \ |
509e760c LJ |
588 | static const char print_fmt_##call[] = print; \ |
589 | \ | |
c32e827b SR |
590 | static struct ftrace_event_call __used \ |
591 | __attribute__((__aligned__(4))) \ | |
592 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 593 | .name = #call, \ |
8f082018 | 594 | .class = &event_class_##template, \ |
80decc70 | 595 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
509e760c | 596 | .print_fmt = print_fmt_##call, \ |
c32e827b | 597 | } |
ac199db0 | 598 | |
f42c85e7 | 599 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 600 | |
f413cdb8 | 601 | /* |
97d5a220 | 602 | * Define the insertion callback to perf events |
f413cdb8 FW |
603 | * |
604 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
605 | * insert in the ring buffer but in a perf counter. | |
606 | * | |
97d5a220 | 607 | * static void ftrace_perf_<call>(proto) |
f413cdb8 FW |
608 | * { |
609 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
610 | * struct ftrace_event_call *event_call = &event_<call>; | |
cdd6c482 | 611 | * extern void perf_tp_event(int, u64, u64, void *, int); |
f413cdb8 | 612 | * struct ftrace_raw_##call *entry; |
444a2a3b | 613 | * struct perf_trace_buf *trace_buf; |
f413cdb8 FW |
614 | * u64 __addr = 0, __count = 1; |
615 | * unsigned long irq_flags; | |
20ab4425 | 616 | * struct trace_entry *ent; |
f413cdb8 FW |
617 | * int __entry_size; |
618 | * int __data_size; | |
20ab4425 | 619 | * int __cpu |
f413cdb8 FW |
620 | * int pc; |
621 | * | |
f413cdb8 FW |
622 | * pc = preempt_count(); |
623 | * | |
624 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
625 | * |
626 | * // Below we want to get the aligned size by taking into account | |
627 | * // the u32 field that will later store the buffer size | |
628 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
629 | * sizeof(u64)); | |
630 | * __entry_size -= sizeof(u32); | |
f413cdb8 | 631 | * |
20ab4425 FW |
632 | * // Protect the non nmi buffer |
633 | * // This also protects the rcu read side | |
634 | * local_irq_save(irq_flags); | |
635 | * __cpu = smp_processor_id(); | |
636 | * | |
637 | * if (in_nmi()) | |
8d53dd54 | 638 | * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); |
20ab4425 | 639 | * else |
8d53dd54 | 640 | * trace_buf = rcu_dereference_sched(perf_trace_buf); |
20ab4425 | 641 | * |
444a2a3b | 642 | * if (!trace_buf) |
20ab4425 | 643 | * goto end; |
f413cdb8 | 644 | * |
444a2a3b FW |
645 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
646 | * | |
647 | * // Avoid recursion from perf that could mess up the buffer | |
648 | * if (trace_buf->recursion++) | |
649 | * goto end_recursion; | |
650 | * | |
651 | * raw_data = trace_buf->buf; | |
652 | * | |
653 | * // Make recursion update visible before entering perf_tp_event | |
654 | * // so that we protect from perf recursions. | |
655 | * | |
656 | * barrier(); | |
1853db0e | 657 | * |
20ab4425 FW |
658 | * //zero dead bytes from alignment to avoid stack leak to userspace: |
659 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
660 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
661 | * ent = &entry->ent; | |
662 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
663 | * ent->type = event_call->id; | |
f413cdb8 | 664 | * |
20ab4425 | 665 | * <tstruct> <- do some jobs with dynamic arrays |
f413cdb8 | 666 | * |
20ab4425 | 667 | * <assign> <- affect our values |
f413cdb8 | 668 | * |
43c1266c | 669 | * perf_tp_event(event_call->id, __addr, __count, entry, |
20ab4425 | 670 | * __entry_size); <- submit them to perf counter |
f413cdb8 FW |
671 | * |
672 | * } | |
673 | */ | |
674 | ||
07b139c8 | 675 | #ifdef CONFIG_PERF_EVENTS |
f413cdb8 | 676 | |
509e760c LJ |
677 | #undef __entry |
678 | #define __entry entry | |
679 | ||
680 | #undef __get_dynamic_array | |
681 | #define __get_dynamic_array(field) \ | |
682 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
683 | ||
684 | #undef __get_str | |
685 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
686 | ||
f413cdb8 FW |
687 | #undef __perf_addr |
688 | #define __perf_addr(a) __addr = (a) | |
689 | ||
690 | #undef __perf_count | |
691 | #define __perf_count(c) __count = (c) | |
692 | ||
091ad365 IM |
693 | #undef DECLARE_EVENT_CLASS |
694 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 695 | static notrace void \ |
2239291a | 696 | perf_trace_##call(void *__data, proto) \ |
f413cdb8 | 697 | { \ |
2239291a | 698 | struct ftrace_event_call *event_call = __data; \ |
f413cdb8 | 699 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f413cdb8 | 700 | struct ftrace_raw_##call *entry; \ |
ff5f149b | 701 | struct pt_regs __regs; \ |
f413cdb8 | 702 | u64 __addr = 0, __count = 1; \ |
1c024eca | 703 | struct hlist_head *head; \ |
f413cdb8 FW |
704 | int __entry_size; \ |
705 | int __data_size; \ | |
4ed7c92d | 706 | int rctx; \ |
f413cdb8 | 707 | \ |
ff5f149b | 708 | perf_fetch_caller_regs(&__regs, 1); \ |
f0218b3e | 709 | \ |
f413cdb8 | 710 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
a044560c PZ |
711 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
712 | sizeof(u64)); \ | |
304703ab | 713 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 714 | \ |
97d5a220 | 715 | if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ |
20ab4425 FW |
716 | "profile buffer not large enough")) \ |
717 | return; \ | |
b7e2ecef | 718 | \ |
97d5a220 | 719 | entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ |
ff5f149b | 720 | __entry_size, event_call->event.type, &__regs, &rctx); \ |
430ad5a6 XG |
721 | if (!entry) \ |
722 | return; \ | |
b7e2ecef | 723 | \ |
20ab4425 FW |
724 | tstruct \ |
725 | \ | |
726 | { assign; } \ | |
727 | \ | |
3771f077 | 728 | head = this_cpu_ptr(event_call->perf_events); \ |
97d5a220 | 729 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
ff5f149b | 730 | __count, &__regs, head); \ |
f413cdb8 FW |
731 | } |
732 | ||
2239291a SR |
733 | /* |
734 | * This part is compiled out, it is only here as a build time check | |
735 | * to make sure that if the tracepoint handling changes, the | |
736 | * perf probe will fail to compile unless it too is updated. | |
737 | */ | |
ff038f5c | 738 | #undef DEFINE_EVENT |
6cc8a7c1 | 739 | #define DEFINE_EVENT(template, call, proto, args) \ |
2239291a | 740 | static inline void perf_test_probe_##call(void) \ |
6cc8a7c1 | 741 | { \ |
2239291a | 742 | check_trace_callback_type_##call(perf_trace_##template); \ |
ff038f5c SR |
743 | } |
744 | ||
2239291a | 745 | |
e5bc9721 SR |
746 | #undef DEFINE_EVENT_PRINT |
747 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
748 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
749 | ||
f413cdb8 | 750 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
07b139c8 | 751 | #endif /* CONFIG_PERF_EVENTS */ |
f413cdb8 | 752 | |
ac199db0 PZ |
753 | #undef _TRACE_PROFILE_INIT |
754 |