Commit | Line | Data |
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40652b65 | 1 | #include <lttng.h> |
299338c8 | 2 | #include <lttng-types.h> |
d0dd2ecb | 3 | #include <linux/debugfs.h> |
6db3d13b | 4 | #include "../ltt-tracer-core.h" |
40652b65 | 5 | |
6db3d13b MD |
6 | #if 0 |
7 | ||
8 | /* keep for a later stage (copy stage) */ | |
40652b65 MD |
9 | /* |
10 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to | |
11 | * strcpy(). | |
12 | */ | |
1d12cebd | 13 | #undef tp_assign |
40652b65 MD |
14 | #define tp_assign(dest, src) \ |
15 | lib_ring_buffer_align_ctx(config, &ctx, sizeof(src)); \ | |
16 | lib_ring_buffer_write(config, &ctx, &src, sizeof(src)); | |
17 | ||
1d12cebd | 18 | #undef tp_memcpy |
40652b65 MD |
19 | #define tp_memcpy(dest, src, len) \ |
20 | lib_ring_buffer_align_ctx(config, &ctx, sizeof(*(src))); \ | |
21 | lib_ring_buffer_write(config, &ctx, &src, len); | |
22 | ||
23 | /* TODO */ | |
1d12cebd | 24 | #undef tp_strcpy |
299338c8 MD |
25 | #define tp_strcpy(dest, src) __assign_str(dest, src); |
26 | ||
6db3d13b MD |
27 | #endif //0 |
28 | ||
0d1d4002 MD |
29 | /* TODO : deal with DEFINE_EVENT vs event class */ |
30 | ||
299338c8 MD |
31 | struct lttng_event_field { |
32 | const char *name; | |
33 | const struct lttng_type type; | |
34 | }; | |
35 | ||
36 | struct lttng_event_desc { | |
37 | const struct lttng_event_field *fields; | |
d0dd2ecb MD |
38 | const char *name; |
39 | unsigned int nr_fields; | |
299338c8 | 40 | }; |
40652b65 MD |
41 | |
42 | /* | |
6db3d13b | 43 | * Macro declarations used for all stages. |
40652b65 MD |
44 | */ |
45 | ||
46 | /* | |
47 | * DECLARE_EVENT_CLASS can be used to add a generic function | |
48 | * handlers for events. That is, if all events have the same | |
49 | * parameters and just have distinct trace points. | |
50 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
51 | * will map the DECLARE_EVENT_CLASS to the tracepoint. | |
52 | * | |
53 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
54 | */ | |
6db3d13b | 55 | |
40652b65 MD |
56 | #undef TRACE_EVENT |
57 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
58 | DECLARE_EVENT_CLASS(name, \ | |
59 | PARAMS(proto), \ | |
60 | PARAMS(args), \ | |
61 | PARAMS(tstruct), \ | |
62 | PARAMS(assign), \ | |
299338c8 MD |
63 | PARAMS(print)) \ |
64 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)) | |
40652b65 | 65 | |
6db3d13b MD |
66 | #undef DEFINE_EVENT_PRINT |
67 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
68 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
69 | ||
70 | /* Callbacks are meaningless to LTTng. */ | |
71 | #undef TRACE_EVENT_FN | |
72 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
73 | assign, print, reg, unreg) \ | |
74 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ | |
75 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
76 | ||
77 | /* | |
78 | * Stage 1 of the trace events. | |
79 | * | |
80 | * Create event field type metadata section. | |
81 | * Each event produce an array of fields. | |
82 | */ | |
83 | ||
84 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
85 | ||
1d12cebd MD |
86 | /* Named field types must be defined in lttng-types.h */ |
87 | ||
40652b65 | 88 | #undef __field |
299338c8 MD |
89 | #define __field(_type, _item) \ |
90 | { .name = #_item, .type = { .atype = atype_integer, .name = #_type} }, | |
40652b65 MD |
91 | |
92 | #undef __field_ext | |
6db3d13b | 93 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) |
40652b65 MD |
94 | |
95 | #undef __array | |
299338c8 MD |
96 | #define __array(_type, _item, _length) \ |
97 | { \ | |
98 | .name = #_item, \ | |
99 | .type = { \ | |
100 | .atype = atype_array, \ | |
101 | .name = NULL, \ | |
102 | .u.array.elem_type = #_type, \ | |
103 | .u.array.length = _length, \ | |
104 | }, \ | |
105 | }, | |
40652b65 MD |
106 | |
107 | #undef __dynamic_array | |
299338c8 MD |
108 | #define __dynamic_array(_type, _item, _length) \ |
109 | { \ | |
110 | .name = #_item, \ | |
111 | .type = { \ | |
112 | .atype = atype_sequence, \ | |
113 | .name = NULL, \ | |
114 | .u.sequence.elem_type = #_type, \ | |
115 | .u.sequence.length_type = "u32", \ | |
116 | }, \ | |
117 | }, | |
40652b65 MD |
118 | |
119 | #undef __string | |
1d12cebd | 120 | #define __string(_item, _src) \ |
299338c8 | 121 | { \ |
0d1d4002 | 122 | .name = #_item, \ |
299338c8 MD |
123 | .type = { \ |
124 | .atype = atype_string, \ | |
125 | .name = NULL, \ | |
126 | .u.string.encoding = lttng_encode_UTF8, \ | |
127 | }, \ | |
128 | }, | |
1d12cebd | 129 | |
40652b65 | 130 | #undef TP_STRUCT__entry |
1d12cebd MD |
131 | #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ |
132 | ||
40652b65 | 133 | #undef DECLARE_EVENT_CLASS |
0d1d4002 MD |
134 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
135 | static const struct lttng_event_field __event_fields___##_name[] = { \ | |
136 | _tstruct \ | |
299338c8 MD |
137 | }; |
138 | ||
299338c8 MD |
139 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
140 | ||
141 | /* | |
142 | * Stage 2 of the trace events. | |
143 | * | |
144 | * Create an array of events. | |
145 | */ | |
146 | ||
299338c8 MD |
147 | /* Named field types must be defined in lttng-types.h */ |
148 | ||
6db3d13b | 149 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
299338c8 MD |
150 | |
151 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
152 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
153 | { \ | |
154 | .fields = __event_fields___##_name, \ | |
155 | .name = #_name, \ | |
156 | .nr_fields = ARRAY_SIZE(__event_fields___##_name), \ | |
6db3d13b | 157 | }, |
40652b65 | 158 | |
d0dd2ecb MD |
159 | #define TP_ID1(_token, _system) _token##_system |
160 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
40652b65 | 161 | |
d0dd2ecb | 162 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
40652b65 | 163 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
299338c8 MD |
164 | }; |
165 | ||
d0dd2ecb MD |
166 | #undef TP_ID1 |
167 | #undef TP_ID | |
168 | ||
169 | /* | |
170 | * Stage 3 of the trace events. | |
171 | * | |
172 | * Create seq file metadata output. | |
173 | */ | |
174 | ||
d0dd2ecb MD |
175 | #define TP_ID1(_token, _system) _token##_system |
176 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
177 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
178 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
179 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
180 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
181 | ||
182 | static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m, | |
183 | loff_t *pos) | |
184 | { | |
6db3d13b MD |
185 | const struct lttng_event_desc *desc = |
186 | &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos]; | |
d0dd2ecb | 187 | |
6db3d13b MD |
188 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
189 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
190 | return NULL; |
191 | return (void *) desc; | |
192 | } | |
193 | ||
194 | static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m, | |
195 | void *p, loff_t *ppos) | |
196 | { | |
6db3d13b MD |
197 | const struct lttng_event_desc *desc = |
198 | &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)]; | |
d0dd2ecb | 199 | |
6db3d13b MD |
200 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
201 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
202 | return NULL; |
203 | return (void *) desc; | |
204 | } | |
205 | ||
206 | static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m, | |
207 | void *p) | |
208 | { | |
209 | } | |
210 | ||
211 | static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m, | |
212 | void *p) | |
213 | { | |
214 | const struct lttng_event_desc *desc = p; | |
215 | int i; | |
216 | ||
217 | seq_printf(m, "event {\n" | |
218 | "\tname = %s;\n" | |
219 | "\tid = UNKNOWN;\n" | |
220 | "\tstream = UNKNOWN;\n" | |
221 | "\tfields = {\n", | |
222 | desc->name); | |
223 | for (i = 0; i < desc->nr_fields; i++) { | |
224 | if (desc->fields[i].type.name) /* Named type */ | |
225 | seq_printf(m, "\t\t%s", | |
226 | desc->fields[i].type.name); | |
227 | else /* Nameless type */ | |
228 | lttng_print_event_type(m, 2, &desc->fields[i].type); | |
229 | seq_printf(m, " %s;\n", desc->fields[i].name); | |
230 | } | |
231 | seq_printf(m, "\t};\n"); | |
232 | seq_printf(m, "};\n"); | |
233 | return 0; | |
234 | } | |
235 | ||
236 | static const | |
237 | struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = { | |
238 | .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM), | |
239 | .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM), | |
240 | .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM), | |
241 | .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM), | |
242 | }; | |
243 | ||
244 | static int | |
245 | TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file) | |
246 | { | |
247 | return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM)); | |
248 | } | |
249 | ||
6db3d13b MD |
250 | static const |
251 | struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = { | |
d0dd2ecb MD |
252 | .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM), |
253 | .read = seq_read, | |
254 | .llseek = seq_lseek, | |
255 | .release = seq_release_private, | |
256 | }; | |
257 | ||
258 | static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM); | |
259 | ||
260 | static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void) | |
261 | { | |
262 | int ret = 0; | |
263 | ||
264 | TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) = | |
6db3d13b MD |
265 | debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM), |
266 | S_IWUSR, NULL, NULL, | |
267 | &TP_ID(__lttng_types_fops__, TRACE_SYSTEM)); | |
d0dd2ecb MD |
268 | if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) |
269 | || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) { | |
270 | printk(KERN_ERR "Error creating LTTng type export file\n"); | |
271 | ret = -ENOMEM; | |
272 | goto error; | |
273 | } | |
274 | error: | |
275 | return ret; | |
276 | } | |
277 | ||
278 | module_init_eval(__lttng_types_init__, TRACE_SYSTEM); | |
279 | ||
280 | static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void) | |
281 | { | |
282 | debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)); | |
283 | } | |
284 | ||
285 | module_exit_eval(__lttng_types_exit__, TRACE_SYSTEM); | |
286 | ||
287 | #undef module_init_eval | |
288 | #undef module_exit_eval | |
289 | #undef TP_ID1 | |
290 | #undef TP_ID | |
291 | ||
1d12cebd | 292 | |
40652b65 | 293 | /* |
6db3d13b | 294 | * Stage 4 of the trace events. |
40652b65 MD |
295 | * |
296 | * Create static inline function that calculates event size. | |
297 | */ | |
298 | ||
6db3d13b | 299 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
40652b65 | 300 | |
6db3d13b MD |
301 | /* Named field types must be defined in lttng-types.h */ |
302 | ||
303 | #undef __field | |
0d1d4002 MD |
304 | #define __field(_type, _item) \ |
305 | __event_len += lib_ring_buffer_align(__event_len, sizeof(_type)); \ | |
306 | __event_len += sizeof(_type); | |
6db3d13b MD |
307 | |
308 | #undef __field_ext | |
309 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
310 | ||
311 | #undef __array | |
0d1d4002 MD |
312 | #define __array(_type, _item, _length) \ |
313 | __event_len += lib_ring_buffer_align(__event_len, sizeof(_type)); \ | |
314 | __event_len += sizeof(_type) * (_length); | |
6db3d13b MD |
315 | |
316 | #undef __dynamic_array | |
0d1d4002 MD |
317 | #define __dynamic_array(_type, _item, _length) \ |
318 | __event_len += lib_ring_buffer_align(__event_len, sizeof(u32)); \ | |
319 | __event_len += sizeof(u32); \ | |
320 | __event_len += lib_ring_buffer_align(__event_len, sizeof(_type)); \ | |
321 | __event_len += sizeof(_type) * (_length); | |
6db3d13b MD |
322 | |
323 | #undef __string | |
324 | #define __string(_item, _src) \ | |
0d1d4002 MD |
325 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
326 | ||
327 | #undef TP_PROTO | |
328 | #define TP_PROTO(args...) args | |
6db3d13b MD |
329 | |
330 | #undef TP_STRUCT__entry | |
0d1d4002 | 331 | #define TP_STRUCT__entry(args...) args |
6db3d13b MD |
332 | |
333 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
334 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
335 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
336 | { \ | |
337 | size_t __event_len = 0; \ | |
338 | unsigned int __dynamic_len_idx = 0; \ | |
339 | \ | |
340 | if (0) \ | |
341 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
342 | _tstruct \ | |
343 | return __event_len; \ | |
6db3d13b | 344 | } |
40652b65 MD |
345 | |
346 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
347 | ||
6db3d13b MD |
348 | |
349 | #if 0 | |
350 | ||
40652b65 | 351 | /* |
299338c8 | 352 | * Stage 4 of the trace events. |
40652b65 MD |
353 | * |
354 | * Create the probe function : call even size calculation and write event data | |
355 | * into the buffer. | |
356 | */ | |
357 | ||
358 | ||
359 | ||
360 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
361 | ||
362 | ||
363 | ||
364 | ||
365 | #include <linux/ftrace_event.h> | |
366 | ||
367 | /* | |
368 | * DECLARE_EVENT_CLASS can be used to add a generic function | |
369 | * handlers for events. That is, if all events have the same | |
370 | * parameters and just have distinct trace points. | |
371 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
372 | * will map the DECLARE_EVENT_CLASS to the tracepoint. | |
373 | * | |
374 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
375 | */ | |
376 | #undef TRACE_EVENT | |
377 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
378 | DECLARE_EVENT_CLASS(name, \ | |
379 | PARAMS(proto), \ | |
380 | PARAMS(args), \ | |
381 | PARAMS(tstruct), \ | |
382 | PARAMS(assign), \ | |
383 | PARAMS(print)); \ | |
384 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); | |
385 | ||
386 | ||
387 | #undef __field | |
388 | #define __field(type, item) type item; | |
389 | ||
390 | #undef __field_ext | |
391 | #define __field_ext(type, item, filter_type) type item; | |
392 | ||
393 | #undef __array | |
394 | #define __array(type, item, len) type item[len]; | |
395 | ||
396 | #undef __dynamic_array | |
397 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; | |
398 | ||
399 | #undef __string | |
400 | #define __string(item, src) __dynamic_array(char, item, -1) | |
401 | ||
402 | #undef TP_STRUCT__entry | |
403 | #define TP_STRUCT__entry(args...) args | |
404 | ||
405 | #undef DECLARE_EVENT_CLASS | |
406 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ | |
407 | struct ftrace_raw_##name { \ | |
408 | struct trace_entry ent; \ | |
409 | tstruct \ | |
410 | char __data[0]; \ | |
411 | }; \ | |
412 | \ | |
413 | static struct ftrace_event_class event_class_##name; | |
414 | ||
415 | #undef DEFINE_EVENT | |
416 | #define DEFINE_EVENT(template, name, proto, args) \ | |
417 | static struct ftrace_event_call __used \ | |
418 | __attribute__((__aligned__(4))) event_##name | |
419 | ||
420 | #undef DEFINE_EVENT_PRINT | |
421 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
422 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
423 | ||
424 | /* Callbacks are meaningless to ftrace. */ | |
425 | #undef TRACE_EVENT_FN | |
426 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
427 | assign, print, reg, unreg) \ | |
428 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ | |
429 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
430 | ||
431 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
432 | ||
433 | ||
434 | /* | |
435 | * Stage 2 of the trace events. | |
436 | * | |
437 | * Create static inline function that calculates event size. | |
438 | */ | |
439 | ||
440 | #undef __field | |
441 | #define __field(type, item) | |
442 | ||
443 | #undef __field_ext | |
444 | #define __field_ext(type, item, filter_type) | |
445 | ||
446 | #undef __array | |
447 | #define __array(type, item, len) | |
448 | ||
449 | #undef __dynamic_array | |
450 | #define __dynamic_array(type, item, len) u32 item; | |
451 | ||
452 | #undef __string | |
453 | #define __string(item, src) __dynamic_array(char, item, -1) | |
454 | ||
455 | #undef DECLARE_EVENT_CLASS | |
456 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
457 | struct ftrace_data_offsets_##call { \ | |
458 | tstruct; \ | |
459 | }; | |
460 | ||
461 | #undef DEFINE_EVENT | |
462 | #define DEFINE_EVENT(template, name, proto, args) | |
463 | ||
464 | #undef DEFINE_EVENT_PRINT | |
465 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
466 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
467 | ||
468 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
469 | ||
470 | /* | |
471 | * Stage 3 of the trace events. | |
472 | * | |
473 | * Create the probe function : call even size calculation and write event data | |
474 | * into the buffer. | |
475 | */ | |
476 | ||
477 | #undef __entry | |
478 | #define __entry field | |
479 | ||
480 | #undef TP_printk | |
481 | #define TP_printk(fmt, args...) fmt "\n", args | |
482 | ||
483 | #undef __get_dynamic_array | |
484 | #define __get_dynamic_array(field) \ | |
485 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
486 | ||
487 | #undef __get_str | |
488 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
489 | ||
490 | #undef __print_flags | |
491 | #define __print_flags(flag, delim, flag_array...) \ | |
492 | ({ \ | |
493 | static const struct trace_print_flags __flags[] = \ | |
494 | { flag_array, { -1, NULL }}; \ | |
495 | ftrace_print_flags_seq(p, delim, flag, __flags); \ | |
496 | }) | |
497 | ||
498 | #undef __print_symbolic | |
499 | #define __print_symbolic(value, symbol_array...) \ | |
500 | ({ \ | |
501 | static const struct trace_print_flags symbols[] = \ | |
502 | { symbol_array, { -1, NULL }}; \ | |
503 | ftrace_print_symbols_seq(p, value, symbols); \ | |
504 | }) | |
505 | ||
506 | #undef __print_hex | |
507 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) | |
508 | ||
509 | #undef DECLARE_EVENT_CLASS | |
510 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
511 | static notrace enum print_line_t \ | |
512 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ | |
513 | struct trace_event *trace_event) \ | |
514 | { \ | |
515 | struct ftrace_event_call *event; \ | |
516 | struct trace_seq *s = &iter->seq; \ | |
517 | struct ftrace_raw_##call *field; \ | |
518 | struct trace_entry *entry; \ | |
519 | struct trace_seq *p = &iter->tmp_seq; \ | |
520 | int ret; \ | |
521 | \ | |
522 | event = container_of(trace_event, struct ftrace_event_call, \ | |
523 | event); \ | |
524 | \ | |
525 | entry = iter->ent; \ | |
526 | \ | |
527 | if (entry->type != event->event.type) { \ | |
528 | WARN_ON_ONCE(1); \ | |
529 | return TRACE_TYPE_UNHANDLED; \ | |
530 | } \ | |
531 | \ | |
532 | field = (typeof(field))entry; \ | |
533 | \ | |
534 | trace_seq_init(p); \ | |
535 | ret = trace_seq_printf(s, "%s: ", event->name); \ | |
536 | if (ret) \ | |
537 | ret = trace_seq_printf(s, print); \ | |
538 | if (!ret) \ | |
539 | return TRACE_TYPE_PARTIAL_LINE; \ | |
540 | \ | |
541 | return TRACE_TYPE_HANDLED; \ | |
542 | } \ | |
543 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
544 | .trace = ftrace_raw_output_##call, \ | |
545 | }; | |
546 | ||
547 | #undef DEFINE_EVENT_PRINT | |
548 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
549 | static notrace enum print_line_t \ | |
550 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ | |
551 | struct trace_event *event) \ | |
552 | { \ | |
553 | struct trace_seq *s = &iter->seq; \ | |
554 | struct ftrace_raw_##template *field; \ | |
555 | struct trace_entry *entry; \ | |
556 | struct trace_seq *p = &iter->tmp_seq; \ | |
557 | int ret; \ | |
558 | \ | |
559 | entry = iter->ent; \ | |
560 | \ | |
561 | if (entry->type != event_##call.event.type) { \ | |
562 | WARN_ON_ONCE(1); \ | |
563 | return TRACE_TYPE_UNHANDLED; \ | |
564 | } \ | |
565 | \ | |
566 | field = (typeof(field))entry; \ | |
567 | \ | |
568 | trace_seq_init(p); \ | |
569 | ret = trace_seq_printf(s, "%s: ", #call); \ | |
570 | if (ret) \ | |
571 | ret = trace_seq_printf(s, print); \ | |
572 | if (!ret) \ | |
573 | return TRACE_TYPE_PARTIAL_LINE; \ | |
574 | \ | |
575 | return TRACE_TYPE_HANDLED; \ | |
576 | } \ | |
577 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ | |
578 | .trace = ftrace_raw_output_##call, \ | |
579 | }; | |
580 | ||
581 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
582 | ||
583 | #undef __field_ext | |
584 | #define __field_ext(type, item, filter_type) \ | |
585 | ret = trace_define_field(event_call, #type, #item, \ | |
586 | offsetof(typeof(field), item), \ | |
587 | sizeof(field.item), \ | |
588 | is_signed_type(type), filter_type); \ | |
589 | if (ret) \ | |
590 | return ret; | |
591 | ||
592 | #undef __field | |
593 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) | |
594 | ||
595 | #undef __array | |
596 | #define __array(type, item, len) \ | |
597 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
598 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
599 | offsetof(typeof(field), item), \ | |
600 | sizeof(field.item), \ | |
601 | is_signed_type(type), FILTER_OTHER); \ | |
602 | if (ret) \ | |
603 | return ret; | |
604 | ||
605 | #undef __dynamic_array | |
606 | #define __dynamic_array(type, item, len) \ | |
607 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ | |
608 | offsetof(typeof(field), __data_loc_##item), \ | |
609 | sizeof(field.__data_loc_##item), \ | |
610 | is_signed_type(type), FILTER_OTHER); | |
611 | ||
612 | #undef __string | |
613 | #define __string(item, src) __dynamic_array(char, item, -1) | |
614 | ||
615 | #undef DECLARE_EVENT_CLASS | |
616 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ | |
617 | static int notrace \ | |
618 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ | |
619 | { \ | |
620 | struct ftrace_raw_##call field; \ | |
621 | int ret; \ | |
622 | \ | |
623 | tstruct; \ | |
624 | \ | |
625 | return ret; \ | |
626 | } | |
627 | ||
628 | #undef DEFINE_EVENT | |
629 | #define DEFINE_EVENT(template, name, proto, args) | |
630 | ||
631 | #undef DEFINE_EVENT_PRINT | |
632 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
633 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
634 | ||
635 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
636 | ||
637 | /* | |
638 | * remember the offset of each array from the beginning of the event. | |
639 | */ | |
640 | ||
641 | #undef __entry | |
642 | #define __entry entry | |
643 | ||
644 | #undef __field | |
645 | #define __field(type, item) | |
646 | ||
647 | #undef __field_ext | |
648 | #define __field_ext(type, item, filter_type) | |
649 | ||
650 | #undef __array | |
651 | #define __array(type, item, len) | |
652 | ||
653 | #undef __dynamic_array | |
654 | #define __dynamic_array(type, item, len) \ | |
655 | __data_offsets->item = __data_size + \ | |
656 | offsetof(typeof(*entry), __data); \ | |
657 | __data_offsets->item |= (len * sizeof(type)) << 16; \ | |
658 | __data_size += (len) * sizeof(type); | |
659 | ||
660 | #undef __string | |
661 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) | |
662 | ||
663 | #undef DECLARE_EVENT_CLASS | |
664 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
665 | static inline notrace int ftrace_get_offsets_##call( \ | |
666 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ | |
667 | { \ | |
668 | int __data_size = 0; \ | |
669 | struct ftrace_raw_##call __maybe_unused *entry; \ | |
670 | \ | |
671 | tstruct; \ | |
672 | \ | |
673 | return __data_size; \ | |
674 | } | |
675 | ||
676 | #undef DEFINE_EVENT | |
677 | #define DEFINE_EVENT(template, name, proto, args) | |
678 | ||
679 | #undef DEFINE_EVENT_PRINT | |
680 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
681 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
682 | ||
683 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
684 | ||
685 | /* | |
686 | * Stage 4 of the trace events. | |
687 | * | |
688 | * Override the macros in <trace/trace_events.h> to include the following: | |
689 | * | |
690 | * For those macros defined with TRACE_EVENT: | |
691 | * | |
692 | * static struct ftrace_event_call event_<call>; | |
693 | * | |
694 | * static void ftrace_raw_event_<call>(void *__data, proto) | |
695 | * { | |
696 | * struct ftrace_event_call *event_call = __data; | |
697 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
698 | * struct ring_buffer_event *event; | |
699 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 | |
700 | * struct ring_buffer *buffer; | |
701 | * unsigned long irq_flags; | |
702 | * int __data_size; | |
703 | * int pc; | |
704 | * | |
705 | * local_save_flags(irq_flags); | |
706 | * pc = preempt_count(); | |
707 | * | |
708 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
709 | * | |
710 | * event = trace_current_buffer_lock_reserve(&buffer, | |
711 | * event_<call>->event.type, | |
712 | * sizeof(*entry) + __data_size, | |
713 | * irq_flags, pc); | |
714 | * if (!event) | |
715 | * return; | |
716 | * entry = ring_buffer_event_data(event); | |
717 | * | |
718 | * { <assign>; } <-- Here we assign the entries by the __field and | |
719 | * __array macros. | |
720 | * | |
721 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) | |
722 | * trace_current_buffer_unlock_commit(buffer, | |
723 | * event, irq_flags, pc); | |
724 | * } | |
725 | * | |
726 | * static struct trace_event ftrace_event_type_<call> = { | |
727 | * .trace = ftrace_raw_output_<call>, <-- stage 2 | |
728 | * }; | |
729 | * | |
730 | * static const char print_fmt_<call>[] = <TP_printk>; | |
731 | * | |
732 | * static struct ftrace_event_class __used event_class_<template> = { | |
733 | * .system = "<system>", | |
734 | * .define_fields = ftrace_define_fields_<call>, | |
735 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), | |
736 | * .raw_init = trace_event_raw_init, | |
737 | * .probe = ftrace_raw_event_##call, | |
738 | * .reg = ftrace_event_reg, | |
739 | * }; | |
740 | * | |
741 | * static struct ftrace_event_call __used | |
742 | * __attribute__((__aligned__(4))) | |
743 | * __attribute__((section("_ftrace_events"))) event_<call> = { | |
744 | * .name = "<call>", | |
745 | * .class = event_class_<template>, | |
746 | * .event = &ftrace_event_type_<call>, | |
747 | * .print_fmt = print_fmt_<call>, | |
748 | * }; | |
749 | * | |
750 | */ | |
751 | ||
752 | #ifdef CONFIG_PERF_EVENTS | |
753 | ||
754 | #define _TRACE_PERF_PROTO(call, proto) \ | |
755 | static notrace void \ | |
756 | perf_trace_##call(void *__data, proto); | |
757 | ||
758 | #define _TRACE_PERF_INIT(call) \ | |
759 | .perf_probe = perf_trace_##call, | |
760 | ||
761 | #else | |
762 | #define _TRACE_PERF_PROTO(call, proto) | |
763 | #define _TRACE_PERF_INIT(call) | |
764 | #endif /* CONFIG_PERF_EVENTS */ | |
765 | ||
766 | #undef __entry | |
767 | #define __entry entry | |
768 | ||
769 | #undef __field | |
770 | #define __field(type, item) | |
771 | ||
772 | #undef __array | |
773 | #define __array(type, item, len) | |
774 | ||
775 | #undef __dynamic_array | |
776 | #define __dynamic_array(type, item, len) \ | |
777 | __entry->__data_loc_##item = __data_offsets.item; | |
778 | ||
779 | #undef __string | |
780 | #define __string(item, src) __dynamic_array(char, item, -1) \ | |
781 | ||
782 | #undef __assign_str | |
783 | #define __assign_str(dst, src) \ | |
784 | strcpy(__get_str(dst), src); | |
785 | ||
786 | #undef TP_fast_assign | |
787 | #define TP_fast_assign(args...) args | |
788 | ||
789 | #undef TP_perf_assign | |
790 | #define TP_perf_assign(args...) | |
791 | ||
792 | #undef DECLARE_EVENT_CLASS | |
793 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
794 | \ | |
795 | static notrace void \ | |
796 | ftrace_raw_event_##call(void *__data, proto) \ | |
797 | { \ | |
798 | struct ftrace_event_call *event_call = __data; \ | |
799 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
800 | struct ring_buffer_event *event; \ | |
801 | struct ftrace_raw_##call *entry; \ | |
802 | struct ring_buffer *buffer; \ | |
803 | unsigned long irq_flags; \ | |
804 | int __data_size; \ | |
805 | int pc; \ | |
806 | \ | |
807 | local_save_flags(irq_flags); \ | |
808 | pc = preempt_count(); \ | |
809 | \ | |
810 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
811 | \ | |
812 | event = trace_current_buffer_lock_reserve(&buffer, \ | |
813 | event_call->event.type, \ | |
814 | sizeof(*entry) + __data_size, \ | |
815 | irq_flags, pc); \ | |
816 | if (!event) \ | |
817 | return; \ | |
818 | entry = ring_buffer_event_data(event); \ | |
819 | \ | |
820 | tstruct \ | |
821 | \ | |
822 | { assign; } \ | |
823 | \ | |
824 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ | |
825 | trace_nowake_buffer_unlock_commit(buffer, \ | |
826 | event, irq_flags, pc); \ | |
827 | } | |
828 | /* | |
829 | * The ftrace_test_probe is compiled out, it is only here as a build time check | |
830 | * to make sure that if the tracepoint handling changes, the ftrace probe will | |
831 | * fail to compile unless it too is updated. | |
832 | */ | |
833 | ||
834 | #undef DEFINE_EVENT | |
835 | #define DEFINE_EVENT(template, call, proto, args) \ | |
836 | static inline void ftrace_test_probe_##call(void) \ | |
837 | { \ | |
838 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ | |
839 | } | |
840 | ||
841 | #undef DEFINE_EVENT_PRINT | |
842 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) | |
843 | ||
844 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
845 | ||
846 | #undef __entry | |
847 | #define __entry REC | |
848 | ||
849 | #undef __print_flags | |
850 | #undef __print_symbolic | |
851 | #undef __get_dynamic_array | |
852 | #undef __get_str | |
853 | ||
854 | #undef TP_printk | |
855 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) | |
856 | ||
857 | #undef DECLARE_EVENT_CLASS | |
858 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
859 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ | |
860 | static const char print_fmt_##call[] = print; \ | |
861 | static struct ftrace_event_class __used event_class_##call = { \ | |
862 | .system = __stringify(TRACE_SYSTEM), \ | |
863 | .define_fields = ftrace_define_fields_##call, \ | |
864 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ | |
865 | .raw_init = trace_event_raw_init, \ | |
866 | .probe = ftrace_raw_event_##call, \ | |
867 | .reg = ftrace_event_reg, \ | |
868 | _TRACE_PERF_INIT(call) \ | |
869 | }; | |
870 | ||
871 | #undef DEFINE_EVENT | |
872 | #define DEFINE_EVENT(template, call, proto, args) \ | |
873 | \ | |
874 | static struct ftrace_event_call __used \ | |
875 | __attribute__((__aligned__(4))) \ | |
876 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
877 | .name = #call, \ | |
878 | .class = &event_class_##template, \ | |
879 | .event.funcs = &ftrace_event_type_funcs_##template, \ | |
880 | .print_fmt = print_fmt_##template, \ | |
881 | }; | |
882 | ||
883 | #undef DEFINE_EVENT_PRINT | |
884 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ | |
885 | \ | |
886 | static const char print_fmt_##call[] = print; \ | |
887 | \ | |
888 | static struct ftrace_event_call __used \ | |
889 | __attribute__((__aligned__(4))) \ | |
890 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
891 | .name = #call, \ | |
892 | .class = &event_class_##template, \ | |
893 | .event.funcs = &ftrace_event_type_funcs_##call, \ | |
894 | .print_fmt = print_fmt_##call, \ | |
895 | } | |
896 | ||
897 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
898 | ||
899 | /* | |
900 | * Define the insertion callback to perf events | |
901 | * | |
902 | * The job is very similar to ftrace_raw_event_<call> except that we don't | |
903 | * insert in the ring buffer but in a perf counter. | |
904 | * | |
905 | * static void ftrace_perf_<call>(proto) | |
906 | * { | |
907 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; | |
908 | * struct ftrace_event_call *event_call = &event_<call>; | |
909 | * extern void perf_tp_event(int, u64, u64, void *, int); | |
910 | * struct ftrace_raw_##call *entry; | |
911 | * struct perf_trace_buf *trace_buf; | |
912 | * u64 __addr = 0, __count = 1; | |
913 | * unsigned long irq_flags; | |
914 | * struct trace_entry *ent; | |
915 | * int __entry_size; | |
916 | * int __data_size; | |
917 | * int __cpu | |
918 | * int pc; | |
919 | * | |
920 | * pc = preempt_count(); | |
921 | * | |
922 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); | |
923 | * | |
924 | * // Below we want to get the aligned size by taking into account | |
925 | * // the u32 field that will later store the buffer size | |
926 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), | |
927 | * sizeof(u64)); | |
928 | * __entry_size -= sizeof(u32); | |
929 | * | |
930 | * // Protect the non nmi buffer | |
931 | * // This also protects the rcu read side | |
932 | * local_irq_save(irq_flags); | |
933 | * __cpu = smp_processor_id(); | |
934 | * | |
935 | * if (in_nmi()) | |
936 | * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); | |
937 | * else | |
938 | * trace_buf = rcu_dereference_sched(perf_trace_buf); | |
939 | * | |
940 | * if (!trace_buf) | |
941 | * goto end; | |
942 | * | |
943 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); | |
944 | * | |
945 | * // Avoid recursion from perf that could mess up the buffer | |
946 | * if (trace_buf->recursion++) | |
947 | * goto end_recursion; | |
948 | * | |
949 | * raw_data = trace_buf->buf; | |
950 | * | |
951 | * // Make recursion update visible before entering perf_tp_event | |
952 | * // so that we protect from perf recursions. | |
953 | * | |
954 | * barrier(); | |
955 | * | |
956 | * //zero dead bytes from alignment to avoid stack leak to userspace: | |
957 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; | |
958 | * entry = (struct ftrace_raw_<call> *)raw_data; | |
959 | * ent = &entry->ent; | |
960 | * tracing_generic_entry_update(ent, irq_flags, pc); | |
961 | * ent->type = event_call->id; | |
962 | * | |
963 | * <tstruct> <- do some jobs with dynamic arrays | |
964 | * | |
965 | * <assign> <- affect our values | |
966 | * | |
967 | * perf_tp_event(event_call->id, __addr, __count, entry, | |
968 | * __entry_size); <- submit them to perf counter | |
969 | * | |
970 | * } | |
971 | */ | |
972 | ||
973 | #ifdef CONFIG_PERF_EVENTS | |
974 | ||
975 | #undef __entry | |
976 | #define __entry entry | |
977 | ||
978 | #undef __get_dynamic_array | |
979 | #define __get_dynamic_array(field) \ | |
980 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) | |
981 | ||
982 | #undef __get_str | |
983 | #define __get_str(field) (char *)__get_dynamic_array(field) | |
984 | ||
985 | #undef __perf_addr | |
986 | #define __perf_addr(a) __addr = (a) | |
987 | ||
988 | #undef __perf_count | |
989 | #define __perf_count(c) __count = (c) | |
990 | ||
991 | #undef DECLARE_EVENT_CLASS | |
992 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ | |
993 | static notrace void \ | |
994 | perf_trace_##call(void *__data, proto) \ | |
995 | { \ | |
996 | struct ftrace_event_call *event_call = __data; \ | |
997 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ | |
998 | struct ftrace_raw_##call *entry; \ | |
999 | struct pt_regs __regs; \ | |
1000 | u64 __addr = 0, __count = 1; \ | |
1001 | struct hlist_head *head; \ | |
1002 | int __entry_size; \ | |
1003 | int __data_size; \ | |
1004 | int rctx; \ | |
1005 | \ | |
1006 | perf_fetch_caller_regs(&__regs); \ | |
1007 | \ | |
1008 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ | |
1009 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ | |
1010 | sizeof(u64)); \ | |
1011 | __entry_size -= sizeof(u32); \ | |
1012 | \ | |
1013 | if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ | |
1014 | "profile buffer not large enough")) \ | |
1015 | return; \ | |
1016 | \ | |
1017 | entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ | |
1018 | __entry_size, event_call->event.type, &__regs, &rctx); \ | |
1019 | if (!entry) \ | |
1020 | return; \ | |
1021 | \ | |
1022 | tstruct \ | |
1023 | \ | |
1024 | { assign; } \ | |
1025 | \ | |
1026 | head = this_cpu_ptr(event_call->perf_events); \ | |
1027 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ | |
1028 | __count, &__regs, head); \ | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * This part is compiled out, it is only here as a build time check | |
1033 | * to make sure that if the tracepoint handling changes, the | |
1034 | * perf probe will fail to compile unless it too is updated. | |
1035 | */ | |
1036 | #undef DEFINE_EVENT | |
1037 | #define DEFINE_EVENT(template, call, proto, args) \ | |
1038 | static inline void perf_test_probe_##call(void) \ | |
1039 | { \ | |
1040 | check_trace_callback_type_##call(perf_trace_##template); \ | |
1041 | } | |
1042 | ||
1043 | ||
1044 | #undef DEFINE_EVENT_PRINT | |
1045 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
1046 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
1047 | ||
1048 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1049 | #endif /* CONFIG_PERF_EVENTS */ | |
1050 | ||
1051 | #undef _TRACE_PROFILE_INIT | |
1d12cebd | 1052 | #endif //0 |