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Commit | Line | Data |
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f42c85e7 SR |
1 | /* |
2 | * Stage 1 of the trace events. | |
3 | * | |
4 | * Override the macros in <trace/trace_events.h> to include the following: | |
5 | * | |
6 | * struct ftrace_raw_<call> { | |
7 | * struct trace_entry ent; | |
8 | * <type> <item>; | |
9 | * <type2> <item2>[<len>]; | |
10 | * [...] | |
11 | * }; | |
12 | * | |
13 | * The <type> <item> is created by the __field(type, item) macro or | |
14 | * the __array(type2, item2, len) macro. | |
15 | * We simply do "type item;", and that will create the fields | |
16 | * in the structure. | |
17 | */ | |
18 | ||
19 | #include <linux/ftrace_event.h> | |
20 | ||
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 | ||
97419875 JS |
78 | /* Callbacks are meaningless to ftrace. */ |
79 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
80 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
81 | assign, print, reg, unreg) \ | |
819ce45a FW |
82 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ |
83 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
97419875 | 84 | |
f42c85e7 SR |
85 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
86 | ||
9cbf1176 | 87 | |
f42c85e7 SR |
88 | /* |
89 | * Stage 2 of the trace events. | |
90 | * | |
9cbf1176 FW |
91 | * Include the following: |
92 | * | |
7fcb7c47 | 93 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
94 | * u32 <item1>; |
95 | * u32 <item2>; | |
9cbf1176 FW |
96 | * [...] |
97 | * }; | |
98 | * | |
7d536cb3 | 99 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 100 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 101 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
102 | */ |
103 | ||
7fcb7c47 | 104 | #undef __field |
43b51ead LZ |
105 | #define __field(type, item) |
106 | ||
107 | #undef __field_ext | |
108 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 109 | |
9cbf1176 FW |
110 | #undef __array |
111 | #define __array(type, item, len) | |
112 | ||
7fcb7c47 | 113 | #undef __dynamic_array |
7d536cb3 | 114 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
115 | |
116 | #undef __string | |
7fcb7c47 | 117 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 118 | |
091ad365 IM |
119 | #undef DECLARE_EVENT_CLASS |
120 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 121 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
122 | tstruct; \ |
123 | }; | |
124 | ||
ff038f5c SR |
125 | #undef DEFINE_EVENT |
126 | #define DEFINE_EVENT(template, name, proto, args) | |
127 | ||
e5bc9721 SR |
128 | #undef DEFINE_EVENT_PRINT |
129 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
130 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
131 | ||
9cbf1176 FW |
132 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
133 | ||
134 | /* | |
135 | * Stage 3 of the trace events. | |
136 | * | |
f42c85e7 SR |
137 | * Override the macros in <trace/trace_events.h> to include the following: |
138 | * | |
139 | * enum print_line_t | |
140 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
141 | * { | |
142 | * struct trace_seq *s = &iter->seq; | |
143 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
144 | * struct trace_entry *entry; | |
bc289ae9 | 145 | * struct trace_seq *p = &iter->tmp_seq; |
f42c85e7 SR |
146 | * int ret; |
147 | * | |
148 | * entry = iter->ent; | |
149 | * | |
32c0edae | 150 | * if (entry->type != event_<call>->event.type) { |
f42c85e7 SR |
151 | * WARN_ON_ONCE(1); |
152 | * return TRACE_TYPE_UNHANDLED; | |
153 | * } | |
154 | * | |
155 | * field = (typeof(field))entry; | |
156 | * | |
56d8bd3f | 157 | * trace_seq_init(p); |
50354a8a LZ |
158 | * ret = trace_seq_printf(s, "%s: ", <call>); |
159 | * if (ret) | |
160 | * ret = trace_seq_printf(s, <TP_printk> "\n"); | |
f42c85e7 SR |
161 | * if (!ret) |
162 | * return TRACE_TYPE_PARTIAL_LINE; | |
163 | * | |
164 | * return TRACE_TYPE_HANDLED; | |
165 | * } | |
166 | * | |
167 | * This is the method used to print the raw event to the trace | |
168 | * output format. Note, this is not needed if the data is read | |
169 | * in binary. | |
170 | */ | |
171 | ||
172 | #undef __entry | |
173 | #define __entry field | |
174 | ||
175 | #undef TP_printk | |
176 | #define TP_printk(fmt, args...) fmt "\n", args | |
177 | ||
7fcb7c47 LZ |
178 | #undef __get_dynamic_array |
179 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 180 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 181 | |
9cbf1176 | 182 | #undef __get_str |
7fcb7c47 | 183 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 184 | |
be74b73a SR |
185 | #undef __print_flags |
186 | #define __print_flags(flag, delim, flag_array...) \ | |
187 | ({ \ | |
a48f494e | 188 | static const struct trace_print_flags __flags[] = \ |
be74b73a | 189 | { flag_array, { -1, NULL }}; \ |
a48f494e | 190 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
be74b73a SR |
191 | }) |
192 | ||
0f4fc29d SR |
193 | #undef __print_symbolic |
194 | #define __print_symbolic(value, symbol_array...) \ | |
195 | ({ \ | |
196 | static const struct trace_print_flags symbols[] = \ | |
197 | { symbol_array, { -1, NULL }}; \ | |
198 | ftrace_print_symbols_seq(p, value, symbols); \ | |
199 | }) | |
200 | ||
5a2e3995 KT |
201 | #undef __print_hex |
202 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) | |
203 | ||
091ad365 IM |
204 | #undef DECLARE_EVENT_CLASS |
205 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 206 | static notrace enum print_line_t \ |
80decc70 SR |
207 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
208 | struct trace_event *trace_event) \ | |
f42c85e7 | 209 | { \ |
80decc70 | 210 | struct ftrace_event_call *event; \ |
f42c85e7 SR |
211 | struct trace_seq *s = &iter->seq; \ |
212 | struct ftrace_raw_##call *field; \ | |
213 | struct trace_entry *entry; \ | |
bc289ae9 | 214 | struct trace_seq *p = &iter->tmp_seq; \ |
f42c85e7 SR |
215 | int ret; \ |
216 | \ | |
80decc70 SR |
217 | event = container_of(trace_event, struct ftrace_event_call, \ |
218 | event); \ | |
219 | \ | |
f42c85e7 SR |
220 | entry = iter->ent; \ |
221 | \ | |
32c0edae | 222 | if (entry->type != event->event.type) { \ |
f42c85e7 SR |
223 | WARN_ON_ONCE(1); \ |
224 | return TRACE_TYPE_UNHANDLED; \ | |
225 | } \ | |
226 | \ | |
227 | field = (typeof(field))entry; \ | |
228 | \ | |
56d8bd3f | 229 | trace_seq_init(p); \ |
80decc70 | 230 | ret = trace_seq_printf(s, "%s: ", event->name); \ |
ff038f5c SR |
231 | if (ret) \ |
232 | ret = trace_seq_printf(s, print); \ | |
f42c85e7 SR |
233 | if (!ret) \ |
234 | return TRACE_TYPE_PARTIAL_LINE; \ | |
235 | \ | |
236 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
237 | } \ |
238 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
239 | .trace = ftrace_raw_output_##call, \ | |
240 | }; | |
ff038f5c | 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 \ |
a9a57763 SR |
245 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
246 | struct trace_event *event) \ | |
e5bc9721 SR |
247 | { \ |
248 | struct trace_seq *s = &iter->seq; \ | |
249 | struct ftrace_raw_##template *field; \ | |
250 | struct trace_entry *entry; \ | |
bc289ae9 | 251 | struct trace_seq *p = &iter->tmp_seq; \ |
f42c85e7 SR |
252 | int ret; \ |
253 | \ | |
254 | entry = iter->ent; \ | |
255 | \ | |
32c0edae | 256 | if (entry->type != event_##call.event.type) { \ |
f42c85e7 SR |
257 | WARN_ON_ONCE(1); \ |
258 | return TRACE_TYPE_UNHANDLED; \ | |
259 | } \ | |
260 | \ | |
261 | field = (typeof(field))entry; \ | |
262 | \ | |
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); \ | |
f42c85e7 SR |
267 | if (!ret) \ |
268 | return TRACE_TYPE_PARTIAL_LINE; \ | |
269 | \ | |
270 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
271 | } \ |
272 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
273 | .trace = ftrace_raw_output_##call, \ | |
274 | }; | |
e5bc9721 | 275 | |
f42c85e7 SR |
276 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
277 | ||
43b51ead LZ |
278 | #undef __field_ext |
279 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
280 | ret = trace_define_field(event_call, #type, #item, \ |
281 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
282 | sizeof(field.item), \ |
283 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
284 | if (ret) \ |
285 | return ret; | |
286 | ||
43b51ead LZ |
287 | #undef __field |
288 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
289 | ||
f42c85e7 SR |
290 | #undef __array |
291 | #define __array(type, item, len) \ | |
292 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
293 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
294 | offsetof(typeof(field), item), \ | |
fb7ae981 LJ |
295 | sizeof(field.item), \ |
296 | is_signed_type(type), FILTER_OTHER); \ | |
f42c85e7 SR |
297 | if (ret) \ |
298 | return ret; | |
299 | ||
7fcb7c47 LZ |
300 | #undef __dynamic_array |
301 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 302 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 303 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
304 | sizeof(field.__data_loc_##item), \ |
305 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 306 | |
9cbf1176 | 307 | #undef __string |
7fcb7c47 | 308 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 309 | |
091ad365 IM |
310 | #undef DECLARE_EVENT_CLASS |
311 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
83f0d539 | 312 | static int notrace \ |
14be96c9 | 313 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
314 | { \ |
315 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
316 | int ret; \ |
317 | \ | |
f42c85e7 SR |
318 | tstruct; \ |
319 | \ | |
320 | return ret; \ | |
321 | } | |
322 | ||
ff038f5c SR |
323 | #undef DEFINE_EVENT |
324 | #define DEFINE_EVENT(template, name, proto, args) | |
325 | ||
e5bc9721 SR |
326 | #undef DEFINE_EVENT_PRINT |
327 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
328 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
329 | ||
f42c85e7 SR |
330 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
331 | ||
7fcb7c47 LZ |
332 | /* |
333 | * remember the offset of each array from the beginning of the event. | |
334 | */ | |
335 | ||
336 | #undef __entry | |
337 | #define __entry entry | |
338 | ||
339 | #undef __field | |
340 | #define __field(type, item) | |
341 | ||
43b51ead LZ |
342 | #undef __field_ext |
343 | #define __field_ext(type, item, filter_type) | |
344 | ||
7fcb7c47 LZ |
345 | #undef __array |
346 | #define __array(type, item, len) | |
347 | ||
348 | #undef __dynamic_array | |
349 | #define __dynamic_array(type, item, len) \ | |
350 | __data_offsets->item = __data_size + \ | |
351 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 352 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
353 | __data_size += (len) * sizeof(type); |
354 | ||
355 | #undef __string | |
ff038f5c | 356 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
7fcb7c47 | 357 | |
091ad365 IM |
358 | #undef DECLARE_EVENT_CLASS |
359 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 360 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
361 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
362 | { \ | |
363 | int __data_size = 0; \ | |
364 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
365 | \ | |
366 | tstruct; \ | |
367 | \ | |
368 | return __data_size; \ | |
369 | } | |
370 | ||
ff038f5c SR |
371 | #undef DEFINE_EVENT |
372 | #define DEFINE_EVENT(template, name, proto, args) | |
373 | ||
e5bc9721 SR |
374 | #undef DEFINE_EVENT_PRINT |
375 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
376 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
377 | ||
7fcb7c47 LZ |
378 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
379 | ||
c32e827b | 380 | /* |
9cbf1176 | 381 | * Stage 4 of the trace events. |
c32e827b | 382 | * |
ea20d929 | 383 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b | 384 | * |
157587d7 | 385 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
386 | * |
387 | * static struct ftrace_event_call event_<call>; | |
388 | * | |
2239291a | 389 | * static void ftrace_raw_event_<call>(void *__data, proto) |
c32e827b | 390 | * { |
2239291a | 391 | * struct ftrace_event_call *event_call = __data; |
50354a8a | 392 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
ef18012b SR |
393 | * struct ring_buffer_event *event; |
394 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 395 | * struct ring_buffer *buffer; |
ef18012b | 396 | * unsigned long irq_flags; |
50354a8a | 397 | * int __data_size; |
ef18012b SR |
398 | * int pc; |
399 | * | |
400 | * local_save_flags(irq_flags); | |
401 | * pc = preempt_count(); | |
402 | * | |
50354a8a LZ |
403 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
404 | * | |
e77405ad | 405 | * event = trace_current_buffer_lock_reserve(&buffer, |
32c0edae | 406 | * event_<call>->event.type, |
50354a8a | 407 | * sizeof(*entry) + __data_size, |
ef18012b SR |
408 | * irq_flags, pc); |
409 | * if (!event) | |
410 | * return; | |
411 | * entry = ring_buffer_event_data(event); | |
412 | * | |
50354a8a LZ |
413 | * { <assign>; } <-- Here we assign the entries by the __field and |
414 | * __array macros. | |
c32e827b | 415 | * |
50354a8a LZ |
416 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) |
417 | * trace_current_buffer_unlock_commit(buffer, | |
418 | * event, irq_flags, pc); | |
c32e827b SR |
419 | * } |
420 | * | |
c32e827b | 421 | * static struct trace_event ftrace_event_type_<call> = { |
ef18012b | 422 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
423 | * }; |
424 | * | |
50354a8a LZ |
425 | * static const char print_fmt_<call>[] = <TP_printk>; |
426 | * | |
8f082018 SR |
427 | * static struct ftrace_event_class __used event_class_<template> = { |
428 | * .system = "<system>", | |
2e33af02 | 429 | * .define_fields = ftrace_define_fields_<call>, |
0405ab80 SR |
430 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
431 | * .raw_init = trace_event_raw_init, | |
432 | * .probe = ftrace_raw_event_##call, | |
a1d0ce82 | 433 | * .reg = ftrace_event_reg, |
8f082018 SR |
434 | * }; |
435 | * | |
c32e827b SR |
436 | * static struct ftrace_event_call __used |
437 | * __attribute__((__aligned__(4))) | |
438 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
ef18012b | 439 | * .name = "<call>", |
8f082018 | 440 | * .class = event_class_<template>, |
2e33af02 | 441 | * .event = &ftrace_event_type_<call>, |
50354a8a | 442 | * .print_fmt = print_fmt_<call>, |
8f082018 | 443 | * }; |
c32e827b SR |
444 | * |
445 | */ | |
446 | ||
07b139c8 | 447 | #ifdef CONFIG_PERF_EVENTS |
ac199db0 | 448 | |
2239291a SR |
449 | #define _TRACE_PERF_PROTO(call, proto) \ |
450 | static notrace void \ | |
451 | perf_trace_##call(void *__data, proto); | |
452 | ||
97d5a220 | 453 | #define _TRACE_PERF_INIT(call) \ |
2239291a | 454 | .perf_probe = perf_trace_##call, |
ac199db0 PZ |
455 | |
456 | #else | |
2239291a | 457 | #define _TRACE_PERF_PROTO(call, proto) |
97d5a220 | 458 | #define _TRACE_PERF_INIT(call) |
07b139c8 | 459 | #endif /* CONFIG_PERF_EVENTS */ |
ac199db0 | 460 | |
da4d0302 SR |
461 | #undef __entry |
462 | #define __entry entry | |
d20e3b03 | 463 | |
9cbf1176 FW |
464 | #undef __field |
465 | #define __field(type, item) | |
466 | ||
467 | #undef __array | |
468 | #define __array(type, item, len) | |
469 | ||
7fcb7c47 LZ |
470 | #undef __dynamic_array |
471 | #define __dynamic_array(type, item, len) \ | |
472 | __entry->__data_loc_##item = __data_offsets.item; | |
473 | ||
9cbf1176 | 474 | #undef __string |
7fcb7c47 | 475 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
476 | |
477 | #undef __assign_str | |
478 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
479 | strcpy(__get_str(dst), src); |
480 | ||
0fa0edaf LJ |
481 | #undef TP_fast_assign |
482 | #define TP_fast_assign(args...) args | |
483 | ||
484 | #undef TP_perf_assign | |
485 | #define TP_perf_assign(args...) | |
486 | ||
091ad365 IM |
487 | #undef DECLARE_EVENT_CLASS |
488 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 489 | \ |
83f0d539 | 490 | static notrace void \ |
2239291a | 491 | ftrace_raw_event_##call(void *__data, proto) \ |
c32e827b | 492 | { \ |
2239291a | 493 | struct ftrace_event_call *event_call = __data; \ |
7fcb7c47 | 494 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
c32e827b SR |
495 | struct ring_buffer_event *event; \ |
496 | struct ftrace_raw_##call *entry; \ | |
e77405ad | 497 | struct ring_buffer *buffer; \ |
c32e827b | 498 | unsigned long irq_flags; \ |
7fcb7c47 | 499 | int __data_size; \ |
c32e827b SR |
500 | int pc; \ |
501 | \ | |
502 | local_save_flags(irq_flags); \ | |
503 | pc = preempt_count(); \ | |
504 | \ | |
7fcb7c47 | 505 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 506 | \ |
e77405ad | 507 | event = trace_current_buffer_lock_reserve(&buffer, \ |
32c0edae | 508 | event_call->event.type, \ |
7fcb7c47 | 509 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 510 | irq_flags, pc); \ |
c32e827b SR |
511 | if (!event) \ |
512 | return; \ | |
513 | entry = ring_buffer_event_data(event); \ | |
514 | \ | |
7fcb7c47 LZ |
515 | tstruct \ |
516 | \ | |
a9c1c3ab | 517 | { assign; } \ |
c32e827b | 518 | \ |
e77405ad SR |
519 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
520 | trace_nowake_buffer_unlock_commit(buffer, \ | |
521 | event, irq_flags, pc); \ | |
ff038f5c | 522 | } |
2239291a SR |
523 | /* |
524 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
525 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
526 | * fail to compile unless it too is updated. | |
527 | */ | |
ff038f5c SR |
528 | |
529 | #undef DEFINE_EVENT | |
530 | #define DEFINE_EVENT(template, call, proto, args) \ | |
2239291a | 531 | static inline void ftrace_test_probe_##call(void) \ |
c32e827b | 532 | { \ |
2239291a SR |
533 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ |
534 | } | |
e5bc9721 SR |
535 | |
536 | #undef DEFINE_EVENT_PRINT | |
80decc70 | 537 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
e5bc9721 SR |
538 | |
539 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
540 | ||
509e760c LJ |
541 | #undef __entry |
542 | #define __entry REC | |
543 | ||
544 | #undef __print_flags | |
545 | #undef __print_symbolic | |
546 | #undef __get_dynamic_array | |
547 | #undef __get_str | |
548 | ||
549 | #undef TP_printk | |
550 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
551 | ||
091ad365 | 552 | #undef DECLARE_EVENT_CLASS |
509e760c | 553 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
2239291a | 554 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
8f082018 SR |
555 | static const char print_fmt_##call[] = print; \ |
556 | static struct ftrace_event_class __used event_class_##call = { \ | |
2239291a | 557 | .system = __stringify(TRACE_SYSTEM), \ |
2e33af02 SR |
558 | .define_fields = ftrace_define_fields_##call, \ |
559 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
0405ab80 | 560 | .raw_init = trace_event_raw_init, \ |
2239291a | 561 | .probe = ftrace_raw_event_##call, \ |
a1d0ce82 | 562 | .reg = ftrace_event_reg, \ |
2239291a | 563 | _TRACE_PERF_INIT(call) \ |
8f082018 | 564 | }; |
e5bc9721 SR |
565 | |
566 | #undef DEFINE_EVENT | |
567 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b SR |
568 | \ |
569 | static struct ftrace_event_call __used \ | |
570 | __attribute__((__aligned__(4))) \ | |
571 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 572 | .name = #call, \ |
8f082018 | 573 | .class = &event_class_##template, \ |
80decc70 | 574 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
509e760c | 575 | .print_fmt = print_fmt_##template, \ |
8f082018 | 576 | }; |
ac199db0 | 577 | |
e5bc9721 SR |
578 | #undef DEFINE_EVENT_PRINT |
579 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 580 | \ |
509e760c LJ |
581 | static const char print_fmt_##call[] = print; \ |
582 | \ | |
c32e827b SR |
583 | static struct ftrace_event_call __used \ |
584 | __attribute__((__aligned__(4))) \ | |
585 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 586 | .name = #call, \ |
8f082018 | 587 | .class = &event_class_##template, \ |
80decc70 | 588 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
509e760c | 589 | .print_fmt = print_fmt_##call, \ |
c32e827b | 590 | } |
ac199db0 | 591 | |
f42c85e7 | 592 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 593 | |
f413cdb8 | 594 | /* |
97d5a220 | 595 | * Define the insertion callback to perf events |
f413cdb8 FW |
596 | * |
597 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
598 | * insert in the ring buffer but in a perf counter. | |
599 | * | |
97d5a220 | 600 | * static void ftrace_perf_<call>(proto) |
f413cdb8 FW |
601 | * { |
602 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
603 | * struct ftrace_event_call *event_call = &event_<call>; | |
cdd6c482 | 604 | * extern void perf_tp_event(int, u64, u64, void *, int); |
f413cdb8 | 605 | * struct ftrace_raw_##call *entry; |
444a2a3b | 606 | * struct perf_trace_buf *trace_buf; |
f413cdb8 FW |
607 | * u64 __addr = 0, __count = 1; |
608 | * unsigned long irq_flags; | |
20ab4425 | 609 | * struct trace_entry *ent; |
f413cdb8 FW |
610 | * int __entry_size; |
611 | * int __data_size; | |
20ab4425 | 612 | * int __cpu |
f413cdb8 FW |
613 | * int pc; |
614 | * | |
f413cdb8 FW |
615 | * pc = preempt_count(); |
616 | * | |
617 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
304703ab FW |
618 | * |
619 | * // Below we want to get the aligned size by taking into account | |
620 | * // the u32 field that will later store the buffer size | |
621 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
622 | * sizeof(u64)); | |
623 | * __entry_size -= sizeof(u32); | |
f413cdb8 | 624 | * |
20ab4425 FW |
625 | * // Protect the non nmi buffer |
626 | * // This also protects the rcu read side | |
627 | * local_irq_save(irq_flags); | |
628 | * __cpu = smp_processor_id(); | |
629 | * | |
630 | * if (in_nmi()) | |
8d53dd54 | 631 | * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); |
20ab4425 | 632 | * else |
8d53dd54 | 633 | * trace_buf = rcu_dereference_sched(perf_trace_buf); |
20ab4425 | 634 | * |
444a2a3b | 635 | * if (!trace_buf) |
20ab4425 | 636 | * goto end; |
f413cdb8 | 637 | * |
444a2a3b FW |
638 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
639 | * | |
640 | * // Avoid recursion from perf that could mess up the buffer | |
641 | * if (trace_buf->recursion++) | |
642 | * goto end_recursion; | |
643 | * | |
644 | * raw_data = trace_buf->buf; | |
645 | * | |
646 | * // Make recursion update visible before entering perf_tp_event | |
647 | * // so that we protect from perf recursions. | |
648 | * | |
649 | * barrier(); | |
1853db0e | 650 | * |
20ab4425 FW |
651 | * //zero dead bytes from alignment to avoid stack leak to userspace: |
652 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
653 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
654 | * ent = &entry->ent; | |
655 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
656 | * ent->type = event_call->id; | |
f413cdb8 | 657 | * |
20ab4425 | 658 | * <tstruct> <- do some jobs with dynamic arrays |
f413cdb8 | 659 | * |
20ab4425 | 660 | * <assign> <- affect our values |
f413cdb8 | 661 | * |
43c1266c | 662 | * perf_tp_event(event_call->id, __addr, __count, entry, |
20ab4425 | 663 | * __entry_size); <- submit them to perf counter |
f413cdb8 FW |
664 | * |
665 | * } | |
666 | */ | |
667 | ||
07b139c8 | 668 | #ifdef CONFIG_PERF_EVENTS |
f413cdb8 | 669 | |
509e760c LJ |
670 | #undef __entry |
671 | #define __entry entry | |
672 | ||
673 | #undef __get_dynamic_array | |
674 | #define __get_dynamic_array(field) \ | |
675 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
676 | ||
677 | #undef __get_str | |
678 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
679 | ||
f413cdb8 FW |
680 | #undef __perf_addr |
681 | #define __perf_addr(a) __addr = (a) | |
682 | ||
683 | #undef __perf_count | |
684 | #define __perf_count(c) __count = (c) | |
685 | ||
091ad365 IM |
686 | #undef DECLARE_EVENT_CLASS |
687 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 688 | static notrace void \ |
2239291a | 689 | perf_trace_##call(void *__data, proto) \ |
f413cdb8 | 690 | { \ |
2239291a | 691 | struct ftrace_event_call *event_call = __data; \ |
f413cdb8 | 692 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f413cdb8 | 693 | struct ftrace_raw_##call *entry; \ |
ff5f149b | 694 | struct pt_regs __regs; \ |
f413cdb8 | 695 | u64 __addr = 0, __count = 1; \ |
1c024eca | 696 | struct hlist_head *head; \ |
f413cdb8 FW |
697 | int __entry_size; \ |
698 | int __data_size; \ | |
4ed7c92d | 699 | int rctx; \ |
f413cdb8 | 700 | \ |
b0f82b81 | 701 | perf_fetch_caller_regs(&__regs); \ |
f0218b3e | 702 | \ |
f413cdb8 | 703 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
a044560c PZ |
704 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
705 | sizeof(u64)); \ | |
304703ab | 706 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 707 | \ |
97d5a220 | 708 | if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ |
20ab4425 FW |
709 | "profile buffer not large enough")) \ |
710 | return; \ | |
b7e2ecef | 711 | \ |
97d5a220 | 712 | entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ |
ff5f149b | 713 | __entry_size, event_call->event.type, &__regs, &rctx); \ |
430ad5a6 XG |
714 | if (!entry) \ |
715 | return; \ | |
b7e2ecef | 716 | \ |
20ab4425 FW |
717 | tstruct \ |
718 | \ | |
719 | { assign; } \ | |
720 | \ | |
3771f077 | 721 | head = this_cpu_ptr(event_call->perf_events); \ |
97d5a220 | 722 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
ff5f149b | 723 | __count, &__regs, head); \ |
f413cdb8 FW |
724 | } |
725 | ||
2239291a SR |
726 | /* |
727 | * This part is compiled out, it is only here as a build time check | |
728 | * to make sure that if the tracepoint handling changes, the | |
729 | * perf probe will fail to compile unless it too is updated. | |
730 | */ | |
ff038f5c | 731 | #undef DEFINE_EVENT |
6cc8a7c1 | 732 | #define DEFINE_EVENT(template, call, proto, args) \ |
2239291a | 733 | static inline void perf_test_probe_##call(void) \ |
6cc8a7c1 | 734 | { \ |
2239291a | 735 | check_trace_callback_type_##call(perf_trace_##template); \ |
ff038f5c SR |
736 | } |
737 | ||
2239291a | 738 | |
e5bc9721 SR |
739 | #undef DEFINE_EVENT_PRINT |
740 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
741 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
742 | ||
f413cdb8 | 743 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
07b139c8 | 744 | #endif /* CONFIG_PERF_EVENTS */ |
f413cdb8 | 745 | |
ac199db0 PZ |
746 | #undef _TRACE_PROFILE_INIT |
747 |