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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 | ||
4d4c9cc8 SR |
47 | #undef __field_struct |
48 | #define __field_struct(type, item) type item; | |
49 | ||
50 | #undef __field_struct_ext | |
51 | #define __field_struct_ext(type, item, filter_type) type item; | |
52 | ||
f42c85e7 SR |
53 | #undef __array |
54 | #define __array(type, item, len) type item[len]; | |
55 | ||
7fcb7c47 | 56 | #undef __dynamic_array |
7d536cb3 | 57 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
f42c85e7 | 58 | |
9cbf1176 | 59 | #undef __string |
7fcb7c47 | 60 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 61 | |
4449bf92 SRRH |
62 | #undef __bitmask |
63 | #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1) | |
64 | ||
f42c85e7 SR |
65 | #undef TP_STRUCT__entry |
66 | #define TP_STRUCT__entry(args...) args | |
67 | ||
091ad365 IM |
68 | #undef DECLARE_EVENT_CLASS |
69 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ | |
ff038f5c SR |
70 | struct ftrace_raw_##name { \ |
71 | struct trace_entry ent; \ | |
72 | tstruct \ | |
73 | char __data[0]; \ | |
8f082018 SR |
74 | }; \ |
75 | \ | |
76 | static struct ftrace_event_class event_class_##name; | |
77 | ||
ff038f5c SR |
78 | #undef DEFINE_EVENT |
79 | #define DEFINE_EVENT(template, name, proto, args) \ | |
49c17746 | 80 | static struct ftrace_event_call __used \ |
86c38a31 | 81 | __attribute__((__aligned__(4))) event_##name |
f42c85e7 | 82 | |
f5abaa1b SR |
83 | #undef DEFINE_EVENT_FN |
84 | #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ | |
85 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
86 | ||
e5bc9721 SR |
87 | #undef DEFINE_EVENT_PRINT |
88 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
89 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
90 | ||
97419875 JS |
91 | /* Callbacks are meaningless to ftrace. */ |
92 | #undef TRACE_EVENT_FN | |
0dd7b747 FW |
93 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
94 | assign, print, reg, unreg) \ | |
819ce45a FW |
95 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ |
96 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
97419875 | 97 | |
1ed0c597 FW |
98 | #undef TRACE_EVENT_FLAGS |
99 | #define TRACE_EVENT_FLAGS(name, value) \ | |
53cf810b | 100 | __TRACE_EVENT_FLAGS(name, value) |
1ed0c597 | 101 | |
d5b5f391 PZ |
102 | #undef TRACE_EVENT_PERF_PERM |
103 | #define TRACE_EVENT_PERF_PERM(name, expr...) \ | |
104 | __TRACE_EVENT_PERF_PERM(name, expr) | |
105 | ||
f42c85e7 SR |
106 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
107 | ||
9cbf1176 | 108 | |
f42c85e7 SR |
109 | /* |
110 | * Stage 2 of the trace events. | |
111 | * | |
9cbf1176 FW |
112 | * Include the following: |
113 | * | |
7fcb7c47 | 114 | * struct ftrace_data_offsets_<call> { |
7d536cb3 LZ |
115 | * u32 <item1>; |
116 | * u32 <item2>; | |
9cbf1176 FW |
117 | * [...] |
118 | * }; | |
119 | * | |
7d536cb3 | 120 | * The __dynamic_array() macro will create each u32 <item>, this is |
7fcb7c47 | 121 | * to keep the offset of each array from the beginning of the event. |
7d536cb3 | 122 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
9cbf1176 FW |
123 | */ |
124 | ||
7fcb7c47 | 125 | #undef __field |
43b51ead LZ |
126 | #define __field(type, item) |
127 | ||
128 | #undef __field_ext | |
129 | #define __field_ext(type, item, filter_type) | |
7fcb7c47 | 130 | |
4d4c9cc8 SR |
131 | #undef __field_struct |
132 | #define __field_struct(type, item) | |
133 | ||
134 | #undef __field_struct_ext | |
135 | #define __field_struct_ext(type, item, filter_type) | |
136 | ||
9cbf1176 FW |
137 | #undef __array |
138 | #define __array(type, item, len) | |
139 | ||
7fcb7c47 | 140 | #undef __dynamic_array |
7d536cb3 | 141 | #define __dynamic_array(type, item, len) u32 item; |
9cbf1176 FW |
142 | |
143 | #undef __string | |
7fcb7c47 | 144 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 145 | |
4449bf92 SRRH |
146 | #undef __bitmask |
147 | #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) | |
148 | ||
091ad365 IM |
149 | #undef DECLARE_EVENT_CLASS |
150 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
7fcb7c47 | 151 | struct ftrace_data_offsets_##call { \ |
9cbf1176 FW |
152 | tstruct; \ |
153 | }; | |
154 | ||
ff038f5c SR |
155 | #undef DEFINE_EVENT |
156 | #define DEFINE_EVENT(template, name, proto, args) | |
157 | ||
e5bc9721 SR |
158 | #undef DEFINE_EVENT_PRINT |
159 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
160 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
161 | ||
1ed0c597 FW |
162 | #undef TRACE_EVENT_FLAGS |
163 | #define TRACE_EVENT_FLAGS(event, flag) | |
164 | ||
d5b5f391 PZ |
165 | #undef TRACE_EVENT_PERF_PERM |
166 | #define TRACE_EVENT_PERF_PERM(event, expr...) | |
167 | ||
9cbf1176 FW |
168 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
169 | ||
170 | /* | |
171 | * Stage 3 of the trace events. | |
172 | * | |
f42c85e7 SR |
173 | * Override the macros in <trace/trace_events.h> to include the following: |
174 | * | |
175 | * enum print_line_t | |
176 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) | |
177 | * { | |
178 | * struct trace_seq *s = &iter->seq; | |
179 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 | |
180 | * struct trace_entry *entry; | |
bc289ae9 | 181 | * struct trace_seq *p = &iter->tmp_seq; |
f42c85e7 SR |
182 | * int ret; |
183 | * | |
184 | * entry = iter->ent; | |
185 | * | |
32c0edae | 186 | * if (entry->type != event_<call>->event.type) { |
f42c85e7 SR |
187 | * WARN_ON_ONCE(1); |
188 | * return TRACE_TYPE_UNHANDLED; | |
189 | * } | |
190 | * | |
191 | * field = (typeof(field))entry; | |
192 | * | |
56d8bd3f | 193 | * trace_seq_init(p); |
50354a8a LZ |
194 | * ret = trace_seq_printf(s, "%s: ", <call>); |
195 | * if (ret) | |
196 | * ret = trace_seq_printf(s, <TP_printk> "\n"); | |
f42c85e7 SR |
197 | * if (!ret) |
198 | * return TRACE_TYPE_PARTIAL_LINE; | |
199 | * | |
200 | * return TRACE_TYPE_HANDLED; | |
201 | * } | |
202 | * | |
203 | * This is the method used to print the raw event to the trace | |
204 | * output format. Note, this is not needed if the data is read | |
205 | * in binary. | |
206 | */ | |
207 | ||
208 | #undef __entry | |
209 | #define __entry field | |
210 | ||
211 | #undef TP_printk | |
212 | #define TP_printk(fmt, args...) fmt "\n", args | |
213 | ||
7fcb7c47 LZ |
214 | #undef __get_dynamic_array |
215 | #define __get_dynamic_array(field) \ | |
7d536cb3 | 216 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
7fcb7c47 | 217 | |
beba4bb0 SRRH |
218 | #undef __get_dynamic_array_len |
219 | #define __get_dynamic_array_len(field) \ | |
220 | ((__entry->__data_loc_##field >> 16) & 0xffff) | |
221 | ||
9cbf1176 | 222 | #undef __get_str |
7fcb7c47 | 223 | #define __get_str(field) (char *)__get_dynamic_array(field) |
9cbf1176 | 224 | |
4449bf92 SRRH |
225 | #undef __get_bitmask |
226 | #define __get_bitmask(field) \ | |
227 | ({ \ | |
228 | void *__bitmask = __get_dynamic_array(field); \ | |
229 | unsigned int __bitmask_size; \ | |
beba4bb0 | 230 | __bitmask_size = __get_dynamic_array_len(field); \ |
4449bf92 SRRH |
231 | ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ |
232 | }) | |
233 | ||
be74b73a SR |
234 | #undef __print_flags |
235 | #define __print_flags(flag, delim, flag_array...) \ | |
236 | ({ \ | |
a48f494e | 237 | static const struct trace_print_flags __flags[] = \ |
be74b73a | 238 | { flag_array, { -1, NULL }}; \ |
a48f494e | 239 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
be74b73a SR |
240 | }) |
241 | ||
0f4fc29d SR |
242 | #undef __print_symbolic |
243 | #define __print_symbolic(value, symbol_array...) \ | |
244 | ({ \ | |
245 | static const struct trace_print_flags symbols[] = \ | |
246 | { symbol_array, { -1, NULL }}; \ | |
247 | ftrace_print_symbols_seq(p, value, symbols); \ | |
248 | }) | |
249 | ||
2fc1b6f0 | 250 | #undef __print_symbolic_u64 |
251 | #if BITS_PER_LONG == 32 | |
252 | #define __print_symbolic_u64(value, symbol_array...) \ | |
253 | ({ \ | |
254 | static const struct trace_print_flags_u64 symbols[] = \ | |
255 | { symbol_array, { -1, NULL } }; \ | |
256 | ftrace_print_symbols_seq_u64(p, value, symbols); \ | |
257 | }) | |
258 | #else | |
259 | #define __print_symbolic_u64(value, symbol_array...) \ | |
260 | __print_symbolic(value, symbol_array) | |
261 | #endif | |
262 | ||
5a2e3995 KT |
263 | #undef __print_hex |
264 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) | |
265 | ||
091ad365 IM |
266 | #undef DECLARE_EVENT_CLASS |
267 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 268 | static notrace enum print_line_t \ |
80decc70 SR |
269 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
270 | struct trace_event *trace_event) \ | |
f42c85e7 SR |
271 | { \ |
272 | struct trace_seq *s = &iter->seq; \ | |
f71130de | 273 | struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ |
f42c85e7 | 274 | struct ftrace_raw_##call *field; \ |
f42c85e7 SR |
275 | int ret; \ |
276 | \ | |
f71130de | 277 | field = (typeof(field))iter->ent; \ |
80decc70 | 278 | \ |
f71130de | 279 | ret = ftrace_raw_output_prep(iter, trace_event); \ |
8e2e095c | 280 | if (ret != TRACE_TYPE_HANDLED) \ |
f71130de LZ |
281 | return ret; \ |
282 | \ | |
19a7fe20 | 283 | trace_seq_printf(s, print); \ |
f42c85e7 | 284 | \ |
19a7fe20 | 285 | return trace_handle_return(s); \ |
80decc70 SR |
286 | } \ |
287 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
288 | .trace = ftrace_raw_output_##call, \ | |
289 | }; | |
ff038f5c | 290 | |
e5bc9721 SR |
291 | #undef DEFINE_EVENT_PRINT |
292 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
83f0d539 | 293 | static notrace enum print_line_t \ |
a9a57763 SR |
294 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
295 | struct trace_event *event) \ | |
e5bc9721 | 296 | { \ |
e5bc9721 SR |
297 | struct ftrace_raw_##template *field; \ |
298 | struct trace_entry *entry; \ | |
bc289ae9 | 299 | struct trace_seq *p = &iter->tmp_seq; \ |
f42c85e7 SR |
300 | \ |
301 | entry = iter->ent; \ | |
302 | \ | |
32c0edae | 303 | if (entry->type != event_##call.event.type) { \ |
f42c85e7 SR |
304 | WARN_ON_ONCE(1); \ |
305 | return TRACE_TYPE_UNHANDLED; \ | |
306 | } \ | |
307 | \ | |
308 | field = (typeof(field))entry; \ | |
309 | \ | |
56d8bd3f | 310 | trace_seq_init(p); \ |
1d6bae96 | 311 | return ftrace_output_call(iter, #call, print); \ |
80decc70 SR |
312 | } \ |
313 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
314 | .trace = ftrace_raw_output_##call, \ | |
315 | }; | |
e5bc9721 | 316 | |
f42c85e7 SR |
317 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
318 | ||
43b51ead LZ |
319 | #undef __field_ext |
320 | #define __field_ext(type, item, filter_type) \ | |
f42c85e7 SR |
321 | ret = trace_define_field(event_call, #type, #item, \ |
322 | offsetof(typeof(field), item), \ | |
43b51ead LZ |
323 | sizeof(field.item), \ |
324 | is_signed_type(type), filter_type); \ | |
f42c85e7 SR |
325 | if (ret) \ |
326 | return ret; | |
327 | ||
4d4c9cc8 SR |
328 | #undef __field_struct_ext |
329 | #define __field_struct_ext(type, item, filter_type) \ | |
330 | ret = trace_define_field(event_call, #type, #item, \ | |
331 | offsetof(typeof(field), item), \ | |
332 | sizeof(field.item), \ | |
333 | 0, filter_type); \ | |
334 | if (ret) \ | |
335 | return ret; | |
336 | ||
43b51ead LZ |
337 | #undef __field |
338 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
339 | ||
4d4c9cc8 SR |
340 | #undef __field_struct |
341 | #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) | |
342 | ||
f42c85e7 SR |
343 | #undef __array |
344 | #define __array(type, item, len) \ | |
04295780 | 345 | do { \ |
87291347 | 346 | char *type_str = #type"["__stringify(len)"]"; \ |
04295780 | 347 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
87291347 | 348 | ret = trace_define_field(event_call, type_str, #item, \ |
f42c85e7 | 349 | offsetof(typeof(field), item), \ |
fb7ae981 LJ |
350 | sizeof(field.item), \ |
351 | is_signed_type(type), FILTER_OTHER); \ | |
04295780 SR |
352 | if (ret) \ |
353 | return ret; \ | |
354 | } while (0); | |
f42c85e7 | 355 | |
7fcb7c47 LZ |
356 | #undef __dynamic_array |
357 | #define __dynamic_array(type, item, len) \ | |
68fd60a8 | 358 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
43b51ead | 359 | offsetof(typeof(field), __data_loc_##item), \ |
fb7ae981 LJ |
360 | sizeof(field.__data_loc_##item), \ |
361 | is_signed_type(type), FILTER_OTHER); | |
7fcb7c47 | 362 | |
9cbf1176 | 363 | #undef __string |
7fcb7c47 | 364 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 | 365 | |
4449bf92 SRRH |
366 | #undef __bitmask |
367 | #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) | |
368 | ||
091ad365 IM |
369 | #undef DECLARE_EVENT_CLASS |
370 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
7e4f44b1 | 371 | static int notrace __init \ |
14be96c9 | 372 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
f42c85e7 SR |
373 | { \ |
374 | struct ftrace_raw_##call field; \ | |
f42c85e7 SR |
375 | int ret; \ |
376 | \ | |
f42c85e7 SR |
377 | tstruct; \ |
378 | \ | |
379 | return ret; \ | |
380 | } | |
381 | ||
ff038f5c SR |
382 | #undef DEFINE_EVENT |
383 | #define DEFINE_EVENT(template, name, proto, args) | |
384 | ||
e5bc9721 SR |
385 | #undef DEFINE_EVENT_PRINT |
386 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
387 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
388 | ||
f42c85e7 SR |
389 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
390 | ||
7fcb7c47 LZ |
391 | /* |
392 | * remember the offset of each array from the beginning of the event. | |
393 | */ | |
394 | ||
395 | #undef __entry | |
396 | #define __entry entry | |
397 | ||
398 | #undef __field | |
399 | #define __field(type, item) | |
400 | ||
43b51ead LZ |
401 | #undef __field_ext |
402 | #define __field_ext(type, item, filter_type) | |
403 | ||
4d4c9cc8 SR |
404 | #undef __field_struct |
405 | #define __field_struct(type, item) | |
406 | ||
407 | #undef __field_struct_ext | |
408 | #define __field_struct_ext(type, item, filter_type) | |
409 | ||
7fcb7c47 LZ |
410 | #undef __array |
411 | #define __array(type, item, len) | |
412 | ||
413 | #undef __dynamic_array | |
414 | #define __dynamic_array(type, item, len) \ | |
114e7b52 | 415 | __item_length = (len) * sizeof(type); \ |
7fcb7c47 LZ |
416 | __data_offsets->item = __data_size + \ |
417 | offsetof(typeof(*entry), __data); \ | |
114e7b52 FB |
418 | __data_offsets->item |= __item_length << 16; \ |
419 | __data_size += __item_length; | |
7fcb7c47 LZ |
420 | |
421 | #undef __string | |
4e58e547 SRRH |
422 | #define __string(item, src) __dynamic_array(char, item, \ |
423 | strlen((src) ? (const char *)(src) : "(null)") + 1) | |
7fcb7c47 | 424 | |
4449bf92 SRRH |
425 | /* |
426 | * __bitmask_size_in_bytes_raw is the number of bytes needed to hold | |
427 | * num_possible_cpus(). | |
428 | */ | |
429 | #define __bitmask_size_in_bytes_raw(nr_bits) \ | |
430 | (((nr_bits) + 7) / 8) | |
431 | ||
432 | #define __bitmask_size_in_longs(nr_bits) \ | |
433 | ((__bitmask_size_in_bytes_raw(nr_bits) + \ | |
434 | ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) | |
435 | ||
436 | /* | |
437 | * __bitmask_size_in_bytes is the number of bytes needed to hold | |
438 | * num_possible_cpus() padded out to the nearest long. This is what | |
439 | * is saved in the buffer, just to be consistent. | |
440 | */ | |
441 | #define __bitmask_size_in_bytes(nr_bits) \ | |
442 | (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) | |
443 | ||
444 | #undef __bitmask | |
445 | #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ | |
446 | __bitmask_size_in_longs(nr_bits)) | |
447 | ||
091ad365 IM |
448 | #undef DECLARE_EVENT_CLASS |
449 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 450 | static inline notrace int ftrace_get_offsets_##call( \ |
7fcb7c47 LZ |
451 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
452 | { \ | |
453 | int __data_size = 0; \ | |
114e7b52 | 454 | int __maybe_unused __item_length; \ |
7fcb7c47 LZ |
455 | struct ftrace_raw_##call __maybe_unused *entry; \ |
456 | \ | |
457 | tstruct; \ | |
458 | \ | |
459 | return __data_size; \ | |
460 | } | |
461 | ||
ff038f5c SR |
462 | #undef DEFINE_EVENT |
463 | #define DEFINE_EVENT(template, name, proto, args) | |
464 | ||
e5bc9721 SR |
465 | #undef DEFINE_EVENT_PRINT |
466 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
467 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
468 | ||
7fcb7c47 LZ |
469 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
470 | ||
c32e827b | 471 | /* |
9cbf1176 | 472 | * Stage 4 of the trace events. |
c32e827b | 473 | * |
ea20d929 | 474 | * Override the macros in <trace/trace_events.h> to include the following: |
c32e827b | 475 | * |
157587d7 | 476 | * For those macros defined with TRACE_EVENT: |
c32e827b SR |
477 | * |
478 | * static struct ftrace_event_call event_<call>; | |
479 | * | |
2239291a | 480 | * static void ftrace_raw_event_<call>(void *__data, proto) |
c32e827b | 481 | * { |
ccb469a1 SR |
482 | * struct ftrace_event_file *ftrace_file = __data; |
483 | * struct ftrace_event_call *event_call = ftrace_file->event_call; | |
50354a8a | 484 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
bac5fb97 TZ |
485 | * unsigned long eflags = ftrace_file->flags; |
486 | * enum event_trigger_type __tt = ETT_NONE; | |
ef18012b SR |
487 | * struct ring_buffer_event *event; |
488 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
e77405ad | 489 | * struct ring_buffer *buffer; |
ef18012b | 490 | * unsigned long irq_flags; |
50354a8a | 491 | * int __data_size; |
ef18012b SR |
492 | * int pc; |
493 | * | |
bac5fb97 TZ |
494 | * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) { |
495 | * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE) | |
496 | * event_triggers_call(ftrace_file, NULL); | |
497 | * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED) | |
498 | * return; | |
499 | * } | |
417944c4 | 500 | * |
ef18012b SR |
501 | * local_save_flags(irq_flags); |
502 | * pc = preempt_count(); | |
503 | * | |
50354a8a LZ |
504 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
505 | * | |
ccb469a1 | 506 | * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, |
32c0edae | 507 | * event_<call>->event.type, |
50354a8a | 508 | * sizeof(*entry) + __data_size, |
ef18012b SR |
509 | * irq_flags, pc); |
510 | * if (!event) | |
511 | * return; | |
512 | * entry = ring_buffer_event_data(event); | |
513 | * | |
50354a8a LZ |
514 | * { <assign>; } <-- Here we assign the entries by the __field and |
515 | * __array macros. | |
c32e827b | 516 | * |
bac5fb97 TZ |
517 | * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND) |
518 | * __tt = event_triggers_call(ftrace_file, entry); | |
519 | * | |
520 | * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, | |
521 | * &ftrace_file->flags)) | |
522 | * ring_buffer_discard_commit(buffer, event); | |
523 | * else if (!filter_check_discard(ftrace_file, entry, buffer, event)) | |
f306cc82 | 524 | * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); |
bac5fb97 TZ |
525 | * |
526 | * if (__tt) | |
527 | * event_triggers_post_call(ftrace_file, __tt); | |
c32e827b SR |
528 | * } |
529 | * | |
c32e827b | 530 | * static struct trace_event ftrace_event_type_<call> = { |
ef18012b | 531 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
c32e827b SR |
532 | * }; |
533 | * | |
50354a8a LZ |
534 | * static const char print_fmt_<call>[] = <TP_printk>; |
535 | * | |
8f082018 SR |
536 | * static struct ftrace_event_class __used event_class_<template> = { |
537 | * .system = "<system>", | |
2e33af02 | 538 | * .define_fields = ftrace_define_fields_<call>, |
0405ab80 SR |
539 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
540 | * .raw_init = trace_event_raw_init, | |
541 | * .probe = ftrace_raw_event_##call, | |
a1d0ce82 | 542 | * .reg = ftrace_event_reg, |
8f082018 SR |
543 | * }; |
544 | * | |
e4a9ea5e | 545 | * static struct ftrace_event_call event_<call> = { |
8f082018 | 546 | * .class = event_class_<template>, |
abb43f69 MD |
547 | * { |
548 | * .tp = &__tracepoint_<call>, | |
549 | * }, | |
2e33af02 | 550 | * .event = &ftrace_event_type_<call>, |
50354a8a | 551 | * .print_fmt = print_fmt_<call>, |
de7b2973 | 552 | * .flags = TRACE_EVENT_FL_TRACEPOINT, |
8f082018 | 553 | * }; |
e4a9ea5e SR |
554 | * // its only safe to use pointers when doing linker tricks to |
555 | * // create an array. | |
556 | * static struct ftrace_event_call __used | |
557 | * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>; | |
c32e827b SR |
558 | * |
559 | */ | |
560 | ||
07b139c8 | 561 | #ifdef CONFIG_PERF_EVENTS |
ac199db0 | 562 | |
2239291a SR |
563 | #define _TRACE_PERF_PROTO(call, proto) \ |
564 | static notrace void \ | |
565 | perf_trace_##call(void *__data, proto); | |
566 | ||
97d5a220 | 567 | #define _TRACE_PERF_INIT(call) \ |
2239291a | 568 | .perf_probe = perf_trace_##call, |
ac199db0 PZ |
569 | |
570 | #else | |
2239291a | 571 | #define _TRACE_PERF_PROTO(call, proto) |
97d5a220 | 572 | #define _TRACE_PERF_INIT(call) |
07b139c8 | 573 | #endif /* CONFIG_PERF_EVENTS */ |
ac199db0 | 574 | |
da4d0302 SR |
575 | #undef __entry |
576 | #define __entry entry | |
d20e3b03 | 577 | |
9cbf1176 FW |
578 | #undef __field |
579 | #define __field(type, item) | |
580 | ||
4d4c9cc8 SR |
581 | #undef __field_struct |
582 | #define __field_struct(type, item) | |
583 | ||
9cbf1176 FW |
584 | #undef __array |
585 | #define __array(type, item, len) | |
586 | ||
7fcb7c47 LZ |
587 | #undef __dynamic_array |
588 | #define __dynamic_array(type, item, len) \ | |
589 | __entry->__data_loc_##item = __data_offsets.item; | |
590 | ||
9cbf1176 | 591 | #undef __string |
4449bf92 | 592 | #define __string(item, src) __dynamic_array(char, item, -1) |
9cbf1176 FW |
593 | |
594 | #undef __assign_str | |
595 | #define __assign_str(dst, src) \ | |
4e58e547 | 596 | strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); |
9cbf1176 | 597 | |
4449bf92 SRRH |
598 | #undef __bitmask |
599 | #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) | |
600 | ||
601 | #undef __get_bitmask | |
602 | #define __get_bitmask(field) (char *)__get_dynamic_array(field) | |
603 | ||
604 | #undef __assign_bitmask | |
605 | #define __assign_bitmask(dst, src, nr_bits) \ | |
606 | memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) | |
607 | ||
0fa0edaf LJ |
608 | #undef TP_fast_assign |
609 | #define TP_fast_assign(args...) args | |
610 | ||
12473965 ON |
611 | #undef __perf_addr |
612 | #define __perf_addr(a) (a) | |
613 | ||
614 | #undef __perf_count | |
615 | #define __perf_count(c) (c) | |
616 | ||
617 | #undef __perf_task | |
618 | #define __perf_task(t) (t) | |
0fa0edaf | 619 | |
091ad365 IM |
620 | #undef DECLARE_EVENT_CLASS |
621 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
c32e827b | 622 | \ |
83f0d539 | 623 | static notrace void \ |
2239291a | 624 | ftrace_raw_event_##call(void *__data, proto) \ |
c32e827b | 625 | { \ |
ae63b31e | 626 | struct ftrace_event_file *ftrace_file = __data; \ |
7fcb7c47 | 627 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
3fd40d1e | 628 | struct ftrace_event_buffer fbuffer; \ |
c32e827b | 629 | struct ftrace_raw_##call *entry; \ |
7fcb7c47 | 630 | int __data_size; \ |
c32e827b | 631 | \ |
13a1e4ae SRRH |
632 | if (ftrace_trigger_soft_disabled(ftrace_file)) \ |
633 | return; \ | |
417944c4 | 634 | \ |
7fcb7c47 | 635 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
9cbf1176 | 636 | \ |
3fd40d1e SR |
637 | entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \ |
638 | sizeof(*entry) + __data_size); \ | |
639 | \ | |
640 | if (!entry) \ | |
c32e827b | 641 | return; \ |
c32e827b | 642 | \ |
7fcb7c47 LZ |
643 | tstruct \ |
644 | \ | |
a9c1c3ab | 645 | { assign; } \ |
c32e827b | 646 | \ |
3fd40d1e | 647 | ftrace_event_buffer_commit(&fbuffer); \ |
ff038f5c | 648 | } |
2239291a SR |
649 | /* |
650 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
651 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
652 | * fail to compile unless it too is updated. | |
653 | */ | |
ff038f5c SR |
654 | |
655 | #undef DEFINE_EVENT | |
656 | #define DEFINE_EVENT(template, call, proto, args) \ | |
2239291a | 657 | static inline void ftrace_test_probe_##call(void) \ |
c32e827b | 658 | { \ |
2239291a SR |
659 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ |
660 | } | |
e5bc9721 SR |
661 | |
662 | #undef DEFINE_EVENT_PRINT | |
80decc70 | 663 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
e5bc9721 SR |
664 | |
665 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
666 | ||
509e760c LJ |
667 | #undef __entry |
668 | #define __entry REC | |
669 | ||
670 | #undef __print_flags | |
671 | #undef __print_symbolic | |
b102f1d0 | 672 | #undef __print_hex |
509e760c | 673 | #undef __get_dynamic_array |
beba4bb0 | 674 | #undef __get_dynamic_array_len |
509e760c | 675 | #undef __get_str |
4449bf92 | 676 | #undef __get_bitmask |
509e760c LJ |
677 | |
678 | #undef TP_printk | |
679 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
680 | ||
091ad365 | 681 | #undef DECLARE_EVENT_CLASS |
509e760c | 682 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
2239291a | 683 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
8f082018 | 684 | static const char print_fmt_##call[] = print; \ |
523c8113 | 685 | static struct ftrace_event_class __used __refdata event_class_##call = { \ |
2239291a | 686 | .system = __stringify(TRACE_SYSTEM), \ |
2e33af02 SR |
687 | .define_fields = ftrace_define_fields_##call, \ |
688 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
0405ab80 | 689 | .raw_init = trace_event_raw_init, \ |
2239291a | 690 | .probe = ftrace_raw_event_##call, \ |
a1d0ce82 | 691 | .reg = ftrace_event_reg, \ |
2239291a | 692 | _TRACE_PERF_INIT(call) \ |
8f082018 | 693 | }; |
e5bc9721 SR |
694 | |
695 | #undef DEFINE_EVENT | |
696 | #define DEFINE_EVENT(template, call, proto, args) \ | |
c32e827b | 697 | \ |
e4a9ea5e | 698 | static struct ftrace_event_call __used event_##call = { \ |
8f082018 | 699 | .class = &event_class_##template, \ |
abb43f69 MD |
700 | { \ |
701 | .tp = &__tracepoint_##call, \ | |
702 | }, \ | |
80decc70 | 703 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
509e760c | 704 | .print_fmt = print_fmt_##template, \ |
de7b2973 | 705 | .flags = TRACE_EVENT_FL_TRACEPOINT, \ |
e4a9ea5e SR |
706 | }; \ |
707 | static struct ftrace_event_call __used \ | |
708 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call | |
ac199db0 | 709 | |
e5bc9721 SR |
710 | #undef DEFINE_EVENT_PRINT |
711 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
c32e827b | 712 | \ |
509e760c LJ |
713 | static const char print_fmt_##call[] = print; \ |
714 | \ | |
e4a9ea5e | 715 | static struct ftrace_event_call __used event_##call = { \ |
8f082018 | 716 | .class = &event_class_##template, \ |
abb43f69 MD |
717 | { \ |
718 | .tp = &__tracepoint_##call, \ | |
719 | }, \ | |
80decc70 | 720 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
509e760c | 721 | .print_fmt = print_fmt_##call, \ |
de7b2973 | 722 | .flags = TRACE_EVENT_FL_TRACEPOINT, \ |
e4a9ea5e SR |
723 | }; \ |
724 | static struct ftrace_event_call __used \ | |
725 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call | |
ac199db0 | 726 | |
f42c85e7 | 727 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
ac199db0 | 728 | |
f413cdb8 | 729 | |
07b139c8 | 730 | #ifdef CONFIG_PERF_EVENTS |
f413cdb8 | 731 | |
509e760c LJ |
732 | #undef __entry |
733 | #define __entry entry | |
734 | ||
735 | #undef __get_dynamic_array | |
736 | #define __get_dynamic_array(field) \ | |
737 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
738 | ||
beba4bb0 SRRH |
739 | #undef __get_dynamic_array_len |
740 | #define __get_dynamic_array_len(field) \ | |
741 | ((__entry->__data_loc_##field >> 16) & 0xffff) | |
742 | ||
509e760c LJ |
743 | #undef __get_str |
744 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
745 | ||
4449bf92 SRRH |
746 | #undef __get_bitmask |
747 | #define __get_bitmask(field) (char *)__get_dynamic_array(field) | |
748 | ||
f413cdb8 | 749 | #undef __perf_addr |
12473965 | 750 | #define __perf_addr(a) (__addr = (a)) |
f413cdb8 FW |
751 | |
752 | #undef __perf_count | |
12473965 | 753 | #define __perf_count(c) (__count = (c)) |
f413cdb8 | 754 | |
e6dab5ff | 755 | #undef __perf_task |
12473965 | 756 | #define __perf_task(t) (__task = (t)) |
92e51938 | 757 | |
091ad365 IM |
758 | #undef DECLARE_EVENT_CLASS |
759 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
83f0d539 | 760 | static notrace void \ |
2239291a | 761 | perf_trace_##call(void *__data, proto) \ |
f413cdb8 | 762 | { \ |
2239291a | 763 | struct ftrace_event_call *event_call = __data; \ |
f413cdb8 | 764 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
f413cdb8 | 765 | struct ftrace_raw_##call *entry; \ |
ff5f149b | 766 | struct pt_regs __regs; \ |
f413cdb8 | 767 | u64 __addr = 0, __count = 1; \ |
e6dab5ff | 768 | struct task_struct *__task = NULL; \ |
1c024eca | 769 | struct hlist_head *head; \ |
f413cdb8 FW |
770 | int __entry_size; \ |
771 | int __data_size; \ | |
4ed7c92d | 772 | int rctx; \ |
f413cdb8 FW |
773 | \ |
774 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
d027e6a9 ON |
775 | \ |
776 | head = this_cpu_ptr(event_call->perf_events); \ | |
777 | if (__builtin_constant_p(!__task) && !__task && \ | |
778 | hlist_empty(head)) \ | |
779 | return; \ | |
780 | \ | |
a044560c PZ |
781 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
782 | sizeof(u64)); \ | |
304703ab | 783 | __entry_size -= sizeof(u32); \ |
f413cdb8 | 784 | \ |
36009d07 ON |
785 | perf_fetch_caller_regs(&__regs); \ |
786 | entry = perf_trace_buf_prepare(__entry_size, \ | |
787 | event_call->event.type, &__regs, &rctx); \ | |
430ad5a6 XG |
788 | if (!entry) \ |
789 | return; \ | |
b7e2ecef | 790 | \ |
20ab4425 FW |
791 | tstruct \ |
792 | \ | |
793 | { assign; } \ | |
794 | \ | |
97d5a220 | 795 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
e6dab5ff | 796 | __count, &__regs, head, __task); \ |
f413cdb8 FW |
797 | } |
798 | ||
2239291a SR |
799 | /* |
800 | * This part is compiled out, it is only here as a build time check | |
801 | * to make sure that if the tracepoint handling changes, the | |
802 | * perf probe will fail to compile unless it too is updated. | |
803 | */ | |
ff038f5c | 804 | #undef DEFINE_EVENT |
6cc8a7c1 | 805 | #define DEFINE_EVENT(template, call, proto, args) \ |
2239291a | 806 | static inline void perf_test_probe_##call(void) \ |
6cc8a7c1 | 807 | { \ |
2239291a | 808 | check_trace_callback_type_##call(perf_trace_##template); \ |
ff038f5c SR |
809 | } |
810 | ||
2239291a | 811 | |
e5bc9721 SR |
812 | #undef DEFINE_EVENT_PRINT |
813 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
814 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
815 | ||
f413cdb8 | 816 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
07b139c8 | 817 | #endif /* CONFIG_PERF_EVENTS */ |
f413cdb8 | 818 |