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 | |
f5abaa1b SR |
74 | #undef DEFINE_EVENT_FN |
75 | #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ | |
76 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
77 | ||
e5bc9721 SR |
78 | #undef DEFINE_EVENT_PRINT |
79 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
80 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
81 | ||
97419875 JS |
82 | /* Callbacks are meaningless to ftrace. */ |
83 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
84 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
85 | assign, print, reg, unreg) \ | |
819ce45a FW |
86 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ |
87 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
97419875 | 88 | |
1ed0c597 FW |
89 | #undef TRACE_EVENT_FLAGS |
90 | #define TRACE_EVENT_FLAGS(name, value) \ | |
53cf810b | 91 | __TRACE_EVENT_FLAGS(name, value) |
1ed0c597 | 92 | |
f42c85e7 SR |
93 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
94 | ||
9cbf1176 | 95 | |
f42c85e7 SR |
96 | /* |
97 | * Stage 2 of the trace events. | |
98 | * | |
9cbf1176 FW |
99 | * Include the following: |
100 | * | |
7fcb7c47 | 101 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
102 | * u32 <item1>; |
103 | * u32 <item2>; | |
9cbf1176 FW |
104 | * [...] |
105 | * }; | |
106 | * | |
7d536cb3 | 107 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 108 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 109 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
110 | */ |
111 | ||
7fcb7c47 | 112 | #undef __field |
43b51ead LZ |
113 | #define __field(type, item) |
114 | ||
115 | #undef __field_ext | |
116 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 117 | |
9cbf1176 FW |
118 | #undef __array |
119 | #define __array(type, item, len) | |
120 | ||
7fcb7c47 | 121 | #undef __dynamic_array |
7d536cb3 | 122 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
123 | |
124 | #undef __string | |
7fcb7c47 | 125 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 126 | |
091ad365 IM |
127 | #undef DECLARE_EVENT_CLASS |
128 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 129 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
130 | tstruct; \ |
131 | }; | |
132 | ||
ff038f5c SR |
133 | #undef DEFINE_EVENT |
134 | #define DEFINE_EVENT(template, name, proto, args) | |
135 | ||
e5bc9721 SR |
136 | #undef DEFINE_EVENT_PRINT |
137 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
138 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
139 | ||
1ed0c597 FW |
140 | #undef TRACE_EVENT_FLAGS |
141 | #define TRACE_EVENT_FLAGS(event, flag) | |
142 | ||
9cbf1176 FW |
143 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
144 | ||
145 | /* | |
146 | * Stage 3 of the trace events. | |
147 | * | |
f42c85e7 SR |
148 | * Override the macros in <trace/trace_events.h> to include the following: |
149 | * | |
150 | * enum print_line_t | |
151 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
152 | * { | |
153 | * struct trace_seq *s = &iter->seq; | |
154 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
155 | * struct trace_entry *entry; | |
bc289ae9 | 156 | * struct trace_seq *p = &iter->tmp_seq; |
f42c85e7 SR |
157 | * int ret; |
158 | * | |
159 | * entry = iter->ent; | |
160 | * | |
32c0edae | 161 | * if (entry->type != event_<call>->event.type) { |
f42c85e7 SR |
162 | * WARN_ON_ONCE(1); |
163 | * return TRACE_TYPE_UNHANDLED; | |
164 | * } | |
165 | * | |
166 | * field = (typeof(field))entry; | |
167 | * | |
56d8bd3f | 168 | * trace_seq_init(p); |
50354a8a LZ |
169 | * ret = trace_seq_printf(s, "%s: ", <call>); |
170 | * if (ret) | |
171 | * ret = trace_seq_printf(s, <TP_printk> "\n"); | |
f42c85e7 SR |
172 | * if (!ret) |
173 | * return TRACE_TYPE_PARTIAL_LINE; | |
174 | * | |
175 | * return TRACE_TYPE_HANDLED; | |
176 | * } | |
177 | * | |
178 | * This is the method used to print the raw event to the trace | |
179 | * output format. Note, this is not needed if the data is read | |
180 | * in binary. | |
181 | */ | |
182 | ||
183 | #undef __entry | |
184 | #define __entry field | |
185 | ||
186 | #undef TP_printk | |
187 | #define TP_printk(fmt, args...) fmt "\n", args | |
188 | ||
7fcb7c47 LZ |
189 | #undef __get_dynamic_array |
190 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 191 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 192 | |
9cbf1176 | 193 | #undef __get_str |
7fcb7c47 | 194 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 195 | |
be74b73a SR |
196 | #undef __print_flags |
197 | #define __print_flags(flag, delim, flag_array...) \ | |
198 | ({ \ | |
a48f494e | 199 | static const struct trace_print_flags __flags[] = \ |
be74b73a | 200 | { flag_array, { -1, NULL }}; \ |
a48f494e | 201 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
be74b73a SR |
202 | }) |
203 | ||
0f4fc29d SR |
204 | #undef __print_symbolic |
205 | #define __print_symbolic(value, symbol_array...) \ | |
206 | ({ \ | |
207 | static const struct trace_print_flags symbols[] = \ | |
208 | { symbol_array, { -1, NULL }}; \ | |
209 | ftrace_print_symbols_seq(p, value, symbols); \ | |
210 | }) | |
211 | ||
2fc1b6f0 | 212 | #undef __print_symbolic_u64 |
213 | #if BITS_PER_LONG == 32 | |
214 | #define __print_symbolic_u64(value, symbol_array...) \ | |
215 | ({ \ | |
216 | static const struct trace_print_flags_u64 symbols[] = \ | |
217 | { symbol_array, { -1, NULL } }; \ | |
218 | ftrace_print_symbols_seq_u64(p, value, symbols); \ | |
219 | }) | |
220 | #else | |
221 | #define __print_symbolic_u64(value, symbol_array...) \ | |
222 | __print_symbolic(value, symbol_array) | |
223 | #endif | |
224 | ||
5a2e3995 KT |
225 | #undef __print_hex |
226 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) | |
227 | ||
091ad365 IM |
228 | #undef DECLARE_EVENT_CLASS |
229 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 230 | static notrace enum print_line_t \ |
80decc70 SR |
231 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
232 | struct trace_event *trace_event) \ | |
f42c85e7 SR |
233 | { \ |
234 | struct trace_seq *s = &iter->seq; \ | |
f71130de | 235 | struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ |
f42c85e7 | 236 | struct ftrace_raw_##call *field; \ |
f42c85e7 SR |
237 | int ret; \ |
238 | \ | |
f71130de | 239 | field = (typeof(field))iter->ent; \ |
80decc70 | 240 | \ |
f71130de | 241 | ret = ftrace_raw_output_prep(iter, trace_event); \ |
ff038f5c | 242 | if (ret) \ |
f71130de LZ |
243 | return ret; \ |
244 | \ | |
245 | ret = trace_seq_printf(s, print); \ | |
f42c85e7 SR |
246 | if (!ret) \ |
247 | return TRACE_TYPE_PARTIAL_LINE; \ | |
248 | \ | |
249 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
250 | } \ |
251 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
252 | .trace = ftrace_raw_output_##call, \ | |
253 | }; | |
ff038f5c | 254 | |
e5bc9721 SR |
255 | #undef DEFINE_EVENT_PRINT |
256 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
83f0d539 | 257 | static notrace enum print_line_t \ |
a9a57763 SR |
258 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
259 | struct trace_event *event) \ | |
e5bc9721 SR |
260 | { \ |
261 | struct trace_seq *s = &iter->seq; \ | |
262 | struct ftrace_raw_##template *field; \ | |
263 | struct trace_entry *entry; \ | |
bc289ae9 | 264 | struct trace_seq *p = &iter->tmp_seq; \ |
f42c85e7 SR |
265 | int ret; \ |
266 | \ | |
267 | entry = iter->ent; \ | |
268 | \ | |
32c0edae | 269 | if (entry->type != event_##call.event.type) { \ |
f42c85e7 SR |
270 | WARN_ON_ONCE(1); \ |
271 | return TRACE_TYPE_UNHANDLED; \ | |
272 | } \ | |
273 | \ | |
274 | field = (typeof(field))entry; \ | |
275 | \ | |
56d8bd3f | 276 | trace_seq_init(p); \ |
e5bc9721 SR |
277 | ret = trace_seq_printf(s, "%s: ", #call); \ |
278 | if (ret) \ | |
279 | ret = trace_seq_printf(s, print); \ | |
f42c85e7 SR |
280 | if (!ret) \ |
281 | return TRACE_TYPE_PARTIAL_LINE; \ | |
282 | \ | |
283 | return TRACE_TYPE_HANDLED; \ | |
80decc70 SR |
284 | } \ |
285 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
286 | .trace = ftrace_raw_output_##call, \ | |
287 | }; | |
e5bc9721 | 288 | |
f42c85e7 SR |
289 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
290 | ||
43b51ead LZ |
291 | #undef __field_ext |
292 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
293 | ret = trace_define_field(event_call, #type, #item, \ |
294 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
295 | sizeof(field.item), \ |
296 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
297 | if (ret) \ |
298 | return ret; | |
299 | ||
43b51ead LZ |
300 | #undef __field |
301 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
302 | ||
f42c85e7 SR |
303 | #undef __array |
304 | #define __array(type, item, len) \ | |
04295780 SR |
305 | do { \ |
306 | mutex_lock(&event_storage_mutex); \ | |
307 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
308 | snprintf(event_storage, sizeof(event_storage), \ | |
309 | "%s[%d]", #type, len); \ | |
310 | ret = trace_define_field(event_call, event_storage, #item, \ | |
f42c85e7 | 311 | offsetof(typeof(field), item), \ |
fb7ae981 LJ |
312 | sizeof(field.item), \ |
313 | is_signed_type(type), FILTER_OTHER); \ | |
04295780 SR |
314 | mutex_unlock(&event_storage_mutex); \ |
315 | if (ret) \ | |
316 | return ret; \ | |
317 | } while (0); | |
f42c85e7 | 318 | |
7fcb7c47 LZ |
319 | #undef __dynamic_array |
320 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 321 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 322 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
323 | sizeof(field.__data_loc_##item), \ |
324 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 325 | |
9cbf1176 | 326 | #undef __string |
7fcb7c47 | 327 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 328 | |
091ad365 IM |
329 | #undef DECLARE_EVENT_CLASS |
330 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
7e4f44b1 | 331 | static int notrace __init \ |
14be96c9 | 332 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
333 | { \ |
334 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
335 | int ret; \ |
336 | \ | |
f42c85e7 SR |
337 | tstruct; \ |
338 | \ | |
339 | return ret; \ | |
340 | } | |
341 | ||
ff038f5c SR |
342 | #undef DEFINE_EVENT |
343 | #define DEFINE_EVENT(template, name, proto, args) | |
344 | ||
e5bc9721 SR |
345 | #undef DEFINE_EVENT_PRINT |
346 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
347 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
348 | ||
f42c85e7 SR |
349 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
350 | ||
7fcb7c47 LZ |
351 | /* |
352 | * remember the offset of each array from the beginning of the event. | |
353 | */ | |
354 | ||
355 | #undef __entry | |
356 | #define __entry entry | |
357 | ||
358 | #undef __field | |
359 | #define __field(type, item) | |
360 | ||
43b51ead LZ |
361 | #undef __field_ext |
362 | #define __field_ext(type, item, filter_type) | |
363 | ||
7fcb7c47 LZ |
364 | #undef __array |
365 | #define __array(type, item, len) | |
366 | ||
367 | #undef __dynamic_array | |
368 | #define __dynamic_array(type, item, len) \ | |
369 | __data_offsets->item = __data_size + \ | |
370 | offsetof(typeof(*entry), __data); \ | |
7d536cb3 | 371 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
7fcb7c47 LZ |
372 | __data_size += (len) * sizeof(type); |
373 | ||
374 | #undef __string | |
ff038f5c | 375 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
7fcb7c47 | 376 | |
091ad365 IM |
377 | #undef DECLARE_EVENT_CLASS |
378 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 379 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
380 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
381 | { \ | |
382 | int __data_size = 0; \ | |
383 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
384 | \ | |
385 | tstruct; \ | |
386 | \ | |
387 | return __data_size; \ | |
388 | } | |
389 | ||
ff038f5c SR |
390 | #undef DEFINE_EVENT |
391 | #define DEFINE_EVENT(template, name, proto, args) | |
392 | ||
e5bc9721 SR |
393 | #undef DEFINE_EVENT_PRINT |
394 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
395 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
396 | ||
7fcb7c47 LZ |
397 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
398 | ||
c32e827b | 399 | /* |
9cbf1176 | 400 | * Stage 4 of the trace events. |
c32e827b | 401 | * |
ea20d929 | 402 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b | 403 | * |
157587d7 | 404 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
405 | * |
406 | * static struct ftrace_event_call event_<call>; | |
407 | * | |
2239291a | 408 | * static void ftrace_raw_event_<call>(void *__data, proto) |
c32e827b | 409 | * { |
ccb469a1 SR |
410 | * struct ftrace_event_file *ftrace_file = __data; |
411 | * struct ftrace_event_call *event_call = ftrace_file->event_call; | |
50354a8a | 412 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
ef18012b SR |
413 | * struct ring_buffer_event *event; |
414 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 415 | * struct ring_buffer *buffer; |
ef18012b | 416 | * unsigned long irq_flags; |
50354a8a | 417 | * int __data_size; |
ef18012b SR |
418 | * int pc; |
419 | * | |
417944c4 SRRH |
420 | * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, |
421 | * &ftrace_file->flags)) | |
422 | * return; | |
423 | * | |
ef18012b SR |
424 | * local_save_flags(irq_flags); |
425 | * pc = preempt_count(); | |
426 | * | |
50354a8a LZ |
427 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
428 | * | |
ccb469a1 | 429 | * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, |
32c0edae | 430 | * event_<call>->event.type, |
50354a8a | 431 | * sizeof(*entry) + __data_size, |
ef18012b SR |
432 | * irq_flags, pc); |
433 | * if (!event) | |
434 | * return; | |
435 | * entry = ring_buffer_event_data(event); | |
436 | * | |
50354a8a LZ |
437 | * { <assign>; } <-- Here we assign the entries by the __field and |
438 | * __array macros. | |
c32e827b | 439 | * |
50354a8a | 440 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) |
ccb469a1 | 441 | * trace_nowake_buffer_unlock_commit(buffer, |
50354a8a | 442 | * event, irq_flags, pc); |
c32e827b SR |
443 | * } |
444 | * | |
c32e827b | 445 | * static struct trace_event ftrace_event_type_<call> = { |
ef18012b | 446 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
447 | * }; |
448 | * | |
50354a8a LZ |
449 | * static const char print_fmt_<call>[] = <TP_printk>; |
450 | * | |
8f082018 SR |
451 | * static struct ftrace_event_class __used event_class_<template> = { |
452 | * .system = "<system>", | |
2e33af02 | 453 | * .define_fields = ftrace_define_fields_<call>, |
0405ab80 SR |
454 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
455 | * .raw_init = trace_event_raw_init, | |
456 | * .probe = ftrace_raw_event_##call, | |
a1d0ce82 | 457 | * .reg = ftrace_event_reg, |
8f082018 SR |
458 | * }; |
459 | * | |
e4a9ea5e | 460 | * static struct ftrace_event_call event_<call> = { |
ef18012b | 461 | * .name = "<call>", |
8f082018 | 462 | * .class = event_class_<template>, |
2e33af02 | 463 | * .event = &ftrace_event_type_<call>, |
50354a8a | 464 | * .print_fmt = print_fmt_<call>, |
8f082018 | 465 | * }; |
e4a9ea5e SR |
466 | * // its only safe to use pointers when doing linker tricks to |
467 | * // create an array. | |
468 | * static struct ftrace_event_call __used | |
469 | * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>; | |
c32e827b SR |
470 | * |
471 | */ | |
472 | ||
07b139c8 | 473 | #ifdef CONFIG_PERF_EVENTS |
ac199db0 | 474 | |
2239291a SR |
475 | #define _TRACE_PERF_PROTO(call, proto) \ |
476 | static notrace void \ | |
477 | perf_trace_##call(void *__data, proto); | |
478 | ||
97d5a220 | 479 | #define _TRACE_PERF_INIT(call) \ |
2239291a | 480 | .perf_probe = perf_trace_##call, |
ac199db0 PZ |
481 | |
482 | #else | |
2239291a | 483 | #define _TRACE_PERF_PROTO(call, proto) |
97d5a220 | 484 | #define _TRACE_PERF_INIT(call) |
07b139c8 | 485 | #endif /* CONFIG_PERF_EVENTS */ |
ac199db0 | 486 | |
da4d0302 SR |
487 | #undef __entry |
488 | #define __entry entry | |
d20e3b03 | 489 | |
9cbf1176 FW |
490 | #undef __field |
491 | #define __field(type, item) | |
492 | ||
493 | #undef __array | |
494 | #define __array(type, item, len) | |
495 | ||
7fcb7c47 LZ |
496 | #undef __dynamic_array |
497 | #define __dynamic_array(type, item, len) \ | |
498 | __entry->__data_loc_##item = __data_offsets.item; | |
499 | ||
9cbf1176 | 500 | #undef __string |
7fcb7c47 | 501 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
9cbf1176 FW |
502 | |
503 | #undef __assign_str | |
504 | #define __assign_str(dst, src) \ | |
9cbf1176 FW |
505 | strcpy(__get_str(dst), src); |
506 | ||
0fa0edaf LJ |
507 | #undef TP_fast_assign |
508 | #define TP_fast_assign(args...) args | |
509 | ||
12473965 ON |
510 | #undef __perf_addr |
511 | #define __perf_addr(a) (a) | |
512 | ||
513 | #undef __perf_count | |
514 | #define __perf_count(c) (c) | |
515 | ||
516 | #undef __perf_task | |
517 | #define __perf_task(t) (t) | |
0fa0edaf | 518 | |
091ad365 IM |
519 | #undef DECLARE_EVENT_CLASS |
520 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 521 | \ |
83f0d539 | 522 | static notrace void \ |
2239291a | 523 | ftrace_raw_event_##call(void *__data, proto) \ |
c32e827b | 524 | { \ |
ae63b31e SR |
525 | struct ftrace_event_file *ftrace_file = __data; \ |
526 | struct ftrace_event_call *event_call = ftrace_file->event_call; \ | |
7fcb7c47 | 527 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
c32e827b SR |
528 | struct ring_buffer_event *event; \ |
529 | struct ftrace_raw_##call *entry; \ | |
e77405ad | 530 | struct ring_buffer *buffer; \ |
c32e827b | 531 | unsigned long irq_flags; \ |
7fcb7c47 | 532 | int __data_size; \ |
c32e827b SR |
533 | int pc; \ |
534 | \ | |
417944c4 SRRH |
535 | if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, \ |
536 | &ftrace_file->flags)) \ | |
537 | return; \ | |
538 | \ | |
c32e827b SR |
539 | local_save_flags(irq_flags); \ |
540 | pc = preempt_count(); \ | |
541 | \ | |
7fcb7c47 | 542 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 543 | \ |
ccb469a1 | 544 | event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, \ |
32c0edae | 545 | event_call->event.type, \ |
7fcb7c47 | 546 | sizeof(*entry) + __data_size, \ |
9cbf1176 | 547 | irq_flags, pc); \ |
c32e827b SR |
548 | if (!event) \ |
549 | return; \ | |
550 | entry = ring_buffer_event_data(event); \ | |
551 | \ | |
7fcb7c47 LZ |
552 | tstruct \ |
553 | \ | |
a9c1c3ab | 554 | { assign; } \ |
c32e827b | 555 | \ |
e77405ad | 556 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
0d5c6e1c | 557 | trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \ |
ff038f5c | 558 | } |
2239291a SR |
559 | /* |
560 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
561 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
562 | * fail to compile unless it too is updated. | |
563 | */ | |
ff038f5c SR |
564 | |
565 | #undef DEFINE_EVENT | |
566 | #define DEFINE_EVENT(template, call, proto, args) \ | |
2239291a | 567 | static inline void ftrace_test_probe_##call(void) \ |
c32e827b | 568 | { \ |
2239291a SR |
569 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ |
570 | } | |
e5bc9721 SR |
571 | |
572 | #undef DEFINE_EVENT_PRINT | |
80decc70 | 573 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
e5bc9721 SR |
574 | |
575 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
576 | ||
509e760c LJ |
577 | #undef __entry |
578 | #define __entry REC | |
579 | ||
580 | #undef __print_flags | |
581 | #undef __print_symbolic | |
b102f1d0 | 582 | #undef __print_hex |
509e760c LJ |
583 | #undef __get_dynamic_array |
584 | #undef __get_str | |
585 | ||
586 | #undef TP_printk | |
587 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
588 | ||
091ad365 | 589 | #undef DECLARE_EVENT_CLASS |
509e760c | 590 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
2239291a | 591 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
8f082018 | 592 | static const char print_fmt_##call[] = print; \ |
523c8113 | 593 | static struct ftrace_event_class __used __refdata event_class_##call = { \ |
2239291a | 594 | .system = __stringify(TRACE_SYSTEM), \ |
2e33af02 SR |
595 | .define_fields = ftrace_define_fields_##call, \ |
596 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
0405ab80 | 597 | .raw_init = trace_event_raw_init, \ |
2239291a | 598 | .probe = ftrace_raw_event_##call, \ |
a1d0ce82 | 599 | .reg = ftrace_event_reg, \ |
2239291a | 600 | _TRACE_PERF_INIT(call) \ |
8f082018 | 601 | }; |
e5bc9721 SR |
602 | |
603 | #undef DEFINE_EVENT | |
604 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b | 605 | \ |
e4a9ea5e | 606 | static struct ftrace_event_call __used event_##call = { \ |
ef18012b | 607 | .name = #call, \ |
8f082018 | 608 | .class = &event_class_##template, \ |
80decc70 | 609 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
509e760c | 610 | .print_fmt = print_fmt_##template, \ |
e4a9ea5e SR |
611 | }; \ |
612 | static struct ftrace_event_call __used \ | |
613 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call | |
ac199db0 | 614 | |
e5bc9721 SR |
615 | #undef DEFINE_EVENT_PRINT |
616 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 617 | \ |
509e760c LJ |
618 | static const char print_fmt_##call[] = print; \ |
619 | \ | |
e4a9ea5e | 620 | static struct ftrace_event_call __used event_##call = { \ |
ef18012b | 621 | .name = #call, \ |
8f082018 | 622 | .class = &event_class_##template, \ |
80decc70 | 623 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
509e760c | 624 | .print_fmt = print_fmt_##call, \ |
e4a9ea5e SR |
625 | }; \ |
626 | static struct ftrace_event_call __used \ | |
627 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call | |
ac199db0 | 628 | |
f42c85e7 | 629 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 630 | |
f413cdb8 | 631 | |
07b139c8 | 632 | #ifdef CONFIG_PERF_EVENTS |
f413cdb8 | 633 | |
509e760c LJ |
634 | #undef __entry |
635 | #define __entry entry | |
636 | ||
637 | #undef __get_dynamic_array | |
638 | #define __get_dynamic_array(field) \ | |
639 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
640 | ||
641 | #undef __get_str | |
642 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
643 | ||
f413cdb8 | 644 | #undef __perf_addr |
12473965 | 645 | #define __perf_addr(a) (__addr = (a)) |
f413cdb8 FW |
646 | |
647 | #undef __perf_count | |
12473965 | 648 | #define __perf_count(c) (__count = (c)) |
f413cdb8 | 649 | |
e6dab5ff | 650 | #undef __perf_task |
12473965 | 651 | #define __perf_task(t) (__task = (t)) |
92e51938 | 652 | |
091ad365 IM |
653 | #undef DECLARE_EVENT_CLASS |
654 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 655 | static notrace void \ |
2239291a | 656 | perf_trace_##call(void *__data, proto) \ |
f413cdb8 | 657 | { \ |
2239291a | 658 | struct ftrace_event_call *event_call = __data; \ |
f413cdb8 | 659 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f413cdb8 | 660 | struct ftrace_raw_##call *entry; \ |
ff5f149b | 661 | struct pt_regs __regs; \ |
f413cdb8 | 662 | u64 __addr = 0, __count = 1; \ |
e6dab5ff | 663 | struct task_struct *__task = NULL; \ |
1c024eca | 664 | struct hlist_head *head; \ |
f413cdb8 FW |
665 | int __entry_size; \ |
666 | int __data_size; \ | |
4ed7c92d | 667 | int rctx; \ |
f413cdb8 FW |
668 | \ |
669 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
d027e6a9 ON |
670 | \ |
671 | head = this_cpu_ptr(event_call->perf_events); \ | |
672 | if (__builtin_constant_p(!__task) && !__task && \ | |
673 | hlist_empty(head)) \ | |
674 | return; \ | |
675 | \ | |
a044560c PZ |
676 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
677 | sizeof(u64)); \ | |
304703ab | 678 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 679 | \ |
36009d07 ON |
680 | perf_fetch_caller_regs(&__regs); \ |
681 | entry = perf_trace_buf_prepare(__entry_size, \ | |
682 | event_call->event.type, &__regs, &rctx); \ | |
430ad5a6 XG |
683 | if (!entry) \ |
684 | return; \ | |
b7e2ecef | 685 | \ |
20ab4425 FW |
686 | tstruct \ |
687 | \ | |
688 | { assign; } \ | |
689 | \ | |
97d5a220 | 690 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
e6dab5ff | 691 | __count, &__regs, head, __task); \ |
f413cdb8 FW |
692 | } |
693 | ||
2239291a SR |
694 | /* |
695 | * This part is compiled out, it is only here as a build time check | |
696 | * to make sure that if the tracepoint handling changes, the | |
697 | * perf probe will fail to compile unless it too is updated. | |
698 | */ | |
ff038f5c | 699 | #undef DEFINE_EVENT |
6cc8a7c1 | 700 | #define DEFINE_EVENT(template, call, proto, args) \ |
2239291a | 701 | static inline void perf_test_probe_##call(void) \ |
6cc8a7c1 | 702 | { \ |
2239291a | 703 | check_trace_callback_type_##call(perf_trace_##template); \ |
ff038f5c SR |
704 | } |
705 | ||
2239291a | 706 | |
e5bc9721 SR |
707 | #undef DEFINE_EVENT_PRINT |
708 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
709 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
710 | ||
f413cdb8 | 711 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
07b139c8 | 712 | #endif /* CONFIG_PERF_EVENTS */ |
f413cdb8 | 713 |