ftrace.h 21 KB

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  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. #include <linux/ftrace_event.h>
  19. /*
  20. * DECLARE_EVENT_CLASS can be used to add a generic function
  21. * handlers for events. That is, if all events have the same
  22. * parameters and just have distinct trace points.
  23. * Each tracepoint can be defined with DEFINE_EVENT and that
  24. * will map the DECLARE_EVENT_CLASS to the tracepoint.
  25. *
  26. * TRACE_EVENT is a one to one mapping between tracepoint and template.
  27. */
  28. #undef TRACE_EVENT
  29. #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  30. DECLARE_EVENT_CLASS(name, \
  31. PARAMS(proto), \
  32. PARAMS(args), \
  33. PARAMS(tstruct), \
  34. PARAMS(assign), \
  35. PARAMS(print)); \
  36. DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  37. #undef __field
  38. #define __field(type, item) type item;
  39. #undef __field_ext
  40. #define __field_ext(type, item, filter_type) type item;
  41. #undef __array
  42. #define __array(type, item, len) type item[len];
  43. #undef __dynamic_array
  44. #define __dynamic_array(type, item, len) u32 __data_loc_##item;
  45. #undef __string
  46. #define __string(item, src) __dynamic_array(char, item, -1)
  47. #undef TP_STRUCT__entry
  48. #define TP_STRUCT__entry(args...) args
  49. #undef DECLARE_EVENT_CLASS
  50. #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
  51. struct ftrace_raw_##name { \
  52. struct trace_entry ent; \
  53. tstruct \
  54. char __data[0]; \
  55. }; \
  56. \
  57. static struct ftrace_event_class event_class_##name;
  58. #undef DEFINE_EVENT
  59. #define DEFINE_EVENT(template, name, proto, args) \
  60. static struct ftrace_event_call \
  61. __attribute__((__aligned__(4))) event_##name
  62. #undef DEFINE_EVENT_PRINT
  63. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  64. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  65. #undef __cpparg
  66. #define __cpparg(arg...) arg
  67. /* Callbacks are meaningless to ftrace. */
  68. #undef TRACE_EVENT_FN
  69. #define TRACE_EVENT_FN(name, proto, args, tstruct, \
  70. assign, print, reg, unreg) \
  71. TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \
  72. __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \
  73. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  74. /*
  75. * Stage 2 of the trace events.
  76. *
  77. * Include the following:
  78. *
  79. * struct ftrace_data_offsets_<call> {
  80. * u32 <item1>;
  81. * u32 <item2>;
  82. * [...]
  83. * };
  84. *
  85. * The __dynamic_array() macro will create each u32 <item>, this is
  86. * to keep the offset of each array from the beginning of the event.
  87. * The size of an array is also encoded, in the higher 16 bits of <item>.
  88. */
  89. #undef __field
  90. #define __field(type, item)
  91. #undef __field_ext
  92. #define __field_ext(type, item, filter_type)
  93. #undef __array
  94. #define __array(type, item, len)
  95. #undef __dynamic_array
  96. #define __dynamic_array(type, item, len) u32 item;
  97. #undef __string
  98. #define __string(item, src) __dynamic_array(char, item, -1)
  99. #undef DECLARE_EVENT_CLASS
  100. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  101. struct ftrace_data_offsets_##call { \
  102. tstruct; \
  103. };
  104. #undef DEFINE_EVENT
  105. #define DEFINE_EVENT(template, name, proto, args)
  106. #undef DEFINE_EVENT_PRINT
  107. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  108. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  109. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  110. /*
  111. * Stage 3 of the trace events.
  112. *
  113. * Override the macros in <trace/trace_events.h> to include the following:
  114. *
  115. * enum print_line_t
  116. * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
  117. * {
  118. * struct trace_seq *s = &iter->seq;
  119. * struct ftrace_raw_<call> *field; <-- defined in stage 1
  120. * struct trace_entry *entry;
  121. * struct trace_seq *p;
  122. * int ret;
  123. *
  124. * entry = iter->ent;
  125. *
  126. * if (entry->type != event_<call>.id) {
  127. * WARN_ON_ONCE(1);
  128. * return TRACE_TYPE_UNHANDLED;
  129. * }
  130. *
  131. * field = (typeof(field))entry;
  132. *
  133. * p = &get_cpu_var(ftrace_event_seq);
  134. * trace_seq_init(p);
  135. * ret = trace_seq_printf(s, "%s: ", <call>);
  136. * if (ret)
  137. * ret = trace_seq_printf(s, <TP_printk> "\n");
  138. * put_cpu();
  139. * if (!ret)
  140. * return TRACE_TYPE_PARTIAL_LINE;
  141. *
  142. * return TRACE_TYPE_HANDLED;
  143. * }
  144. *
  145. * This is the method used to print the raw event to the trace
  146. * output format. Note, this is not needed if the data is read
  147. * in binary.
  148. */
  149. #undef __entry
  150. #define __entry field
  151. #undef TP_printk
  152. #define TP_printk(fmt, args...) fmt "\n", args
  153. #undef __get_dynamic_array
  154. #define __get_dynamic_array(field) \
  155. ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
  156. #undef __get_str
  157. #define __get_str(field) (char *)__get_dynamic_array(field)
  158. #undef __print_flags
  159. #define __print_flags(flag, delim, flag_array...) \
  160. ({ \
  161. static const struct trace_print_flags __flags[] = \
  162. { flag_array, { -1, NULL }}; \
  163. ftrace_print_flags_seq(p, delim, flag, __flags); \
  164. })
  165. #undef __print_symbolic
  166. #define __print_symbolic(value, symbol_array...) \
  167. ({ \
  168. static const struct trace_print_flags symbols[] = \
  169. { symbol_array, { -1, NULL }}; \
  170. ftrace_print_symbols_seq(p, value, symbols); \
  171. })
  172. #undef DECLARE_EVENT_CLASS
  173. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  174. static notrace enum print_line_t \
  175. ftrace_raw_output_id_##call(int event_id, const char *name, \
  176. struct trace_iterator *iter, int flags) \
  177. { \
  178. struct trace_seq *s = &iter->seq; \
  179. struct ftrace_raw_##call *field; \
  180. struct trace_entry *entry; \
  181. struct trace_seq *p; \
  182. int ret; \
  183. \
  184. entry = iter->ent; \
  185. \
  186. if (entry->type != event_id) { \
  187. WARN_ON_ONCE(1); \
  188. return TRACE_TYPE_UNHANDLED; \
  189. } \
  190. \
  191. field = (typeof(field))entry; \
  192. \
  193. p = &get_cpu_var(ftrace_event_seq); \
  194. trace_seq_init(p); \
  195. ret = trace_seq_printf(s, "%s: ", name); \
  196. if (ret) \
  197. ret = trace_seq_printf(s, print); \
  198. put_cpu(); \
  199. if (!ret) \
  200. return TRACE_TYPE_PARTIAL_LINE; \
  201. \
  202. return TRACE_TYPE_HANDLED; \
  203. }
  204. #undef DEFINE_EVENT
  205. #define DEFINE_EVENT(template, name, proto, args) \
  206. static notrace enum print_line_t \
  207. ftrace_raw_output_##name(struct trace_iterator *iter, int flags, \
  208. struct trace_event *event) \
  209. { \
  210. return ftrace_raw_output_id_##template(event_##name.id, \
  211. #name, iter, flags); \
  212. }
  213. #undef DEFINE_EVENT_PRINT
  214. #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
  215. static notrace enum print_line_t \
  216. ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
  217. struct trace_event *event) \
  218. { \
  219. struct trace_seq *s = &iter->seq; \
  220. struct ftrace_raw_##template *field; \
  221. struct trace_entry *entry; \
  222. struct trace_seq *p; \
  223. int ret; \
  224. \
  225. entry = iter->ent; \
  226. \
  227. if (entry->type != event_##call.id) { \
  228. WARN_ON_ONCE(1); \
  229. return TRACE_TYPE_UNHANDLED; \
  230. } \
  231. \
  232. field = (typeof(field))entry; \
  233. \
  234. p = &get_cpu_var(ftrace_event_seq); \
  235. trace_seq_init(p); \
  236. ret = trace_seq_printf(s, "%s: ", #call); \
  237. if (ret) \
  238. ret = trace_seq_printf(s, print); \
  239. put_cpu(); \
  240. if (!ret) \
  241. return TRACE_TYPE_PARTIAL_LINE; \
  242. \
  243. return TRACE_TYPE_HANDLED; \
  244. }
  245. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  246. #undef __field_ext
  247. #define __field_ext(type, item, filter_type) \
  248. ret = trace_define_field(event_call, #type, #item, \
  249. offsetof(typeof(field), item), \
  250. sizeof(field.item), \
  251. is_signed_type(type), filter_type); \
  252. if (ret) \
  253. return ret;
  254. #undef __field
  255. #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
  256. #undef __array
  257. #define __array(type, item, len) \
  258. BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
  259. ret = trace_define_field(event_call, #type "[" #len "]", #item, \
  260. offsetof(typeof(field), item), \
  261. sizeof(field.item), \
  262. is_signed_type(type), FILTER_OTHER); \
  263. if (ret) \
  264. return ret;
  265. #undef __dynamic_array
  266. #define __dynamic_array(type, item, len) \
  267. ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
  268. offsetof(typeof(field), __data_loc_##item), \
  269. sizeof(field.__data_loc_##item), \
  270. is_signed_type(type), FILTER_OTHER);
  271. #undef __string
  272. #define __string(item, src) __dynamic_array(char, item, -1)
  273. #undef DECLARE_EVENT_CLASS
  274. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
  275. static int notrace \
  276. ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
  277. { \
  278. struct ftrace_raw_##call field; \
  279. int ret; \
  280. \
  281. tstruct; \
  282. \
  283. return ret; \
  284. }
  285. #undef DEFINE_EVENT
  286. #define DEFINE_EVENT(template, name, proto, args)
  287. #undef DEFINE_EVENT_PRINT
  288. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  289. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  290. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  291. /*
  292. * remember the offset of each array from the beginning of the event.
  293. */
  294. #undef __entry
  295. #define __entry entry
  296. #undef __field
  297. #define __field(type, item)
  298. #undef __field_ext
  299. #define __field_ext(type, item, filter_type)
  300. #undef __array
  301. #define __array(type, item, len)
  302. #undef __dynamic_array
  303. #define __dynamic_array(type, item, len) \
  304. __data_offsets->item = __data_size + \
  305. offsetof(typeof(*entry), __data); \
  306. __data_offsets->item |= (len * sizeof(type)) << 16; \
  307. __data_size += (len) * sizeof(type);
  308. #undef __string
  309. #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
  310. #undef DECLARE_EVENT_CLASS
  311. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  312. static inline notrace int ftrace_get_offsets_##call( \
  313. struct ftrace_data_offsets_##call *__data_offsets, proto) \
  314. { \
  315. int __data_size = 0; \
  316. struct ftrace_raw_##call __maybe_unused *entry; \
  317. \
  318. tstruct; \
  319. \
  320. return __data_size; \
  321. }
  322. #undef DEFINE_EVENT
  323. #define DEFINE_EVENT(template, name, proto, args)
  324. #undef DEFINE_EVENT_PRINT
  325. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  326. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  327. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  328. /*
  329. * Stage 4 of the trace events.
  330. *
  331. * Override the macros in <trace/trace_events.h> to include the following:
  332. *
  333. * For those macros defined with TRACE_EVENT:
  334. *
  335. * static struct ftrace_event_call event_<call>;
  336. *
  337. * static void ftrace_raw_event_<call>(void *__data, proto)
  338. * {
  339. * struct ftrace_event_call *event_call = __data;
  340. * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
  341. * struct ring_buffer_event *event;
  342. * struct ftrace_raw_<call> *entry; <-- defined in stage 1
  343. * struct ring_buffer *buffer;
  344. * unsigned long irq_flags;
  345. * int __data_size;
  346. * int pc;
  347. *
  348. * local_save_flags(irq_flags);
  349. * pc = preempt_count();
  350. *
  351. * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
  352. *
  353. * event = trace_current_buffer_lock_reserve(&buffer,
  354. * event_<call>.id,
  355. * sizeof(*entry) + __data_size,
  356. * irq_flags, pc);
  357. * if (!event)
  358. * return;
  359. * entry = ring_buffer_event_data(event);
  360. *
  361. * { <assign>; } <-- Here we assign the entries by the __field and
  362. * __array macros.
  363. *
  364. * if (!filter_current_check_discard(buffer, event_call, entry, event))
  365. * trace_current_buffer_unlock_commit(buffer,
  366. * event, irq_flags, pc);
  367. * }
  368. *
  369. * static struct trace_event ftrace_event_type_<call> = {
  370. * .trace = ftrace_raw_output_<call>, <-- stage 2
  371. * };
  372. *
  373. * static const char print_fmt_<call>[] = <TP_printk>;
  374. *
  375. * static struct ftrace_event_class __used event_class_<template> = {
  376. * .system = "<system>",
  377. * .define_fields = ftrace_define_fields_<call>,
  378. * .fields = LIST_HEAD_INIT(event_class_##call.fields),
  379. * .raw_init = trace_event_raw_init,
  380. * .probe = ftrace_raw_event_##call,
  381. * };
  382. *
  383. * static struct ftrace_event_call __used
  384. * __attribute__((__aligned__(4)))
  385. * __attribute__((section("_ftrace_events"))) event_<call> = {
  386. * .name = "<call>",
  387. * .class = event_class_<template>,
  388. * .event = &ftrace_event_type_<call>,
  389. * .print_fmt = print_fmt_<call>,
  390. * };
  391. *
  392. */
  393. #ifdef CONFIG_PERF_EVENTS
  394. #define _TRACE_PERF_PROTO(call, proto) \
  395. static notrace void \
  396. perf_trace_##call(void *__data, proto);
  397. #define _TRACE_PERF_INIT(call) \
  398. .perf_probe = perf_trace_##call,
  399. #else
  400. #define _TRACE_PERF_PROTO(call, proto)
  401. #define _TRACE_PERF_INIT(call)
  402. #endif /* CONFIG_PERF_EVENTS */
  403. #undef __entry
  404. #define __entry entry
  405. #undef __field
  406. #define __field(type, item)
  407. #undef __array
  408. #define __array(type, item, len)
  409. #undef __dynamic_array
  410. #define __dynamic_array(type, item, len) \
  411. __entry->__data_loc_##item = __data_offsets.item;
  412. #undef __string
  413. #define __string(item, src) __dynamic_array(char, item, -1) \
  414. #undef __assign_str
  415. #define __assign_str(dst, src) \
  416. strcpy(__get_str(dst), src);
  417. #undef TP_fast_assign
  418. #define TP_fast_assign(args...) args
  419. #undef TP_perf_assign
  420. #define TP_perf_assign(args...)
  421. #undef DECLARE_EVENT_CLASS
  422. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  423. \
  424. static notrace void \
  425. ftrace_raw_event_##call(void *__data, proto) \
  426. { \
  427. struct ftrace_event_call *event_call = __data; \
  428. struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
  429. struct ring_buffer_event *event; \
  430. struct ftrace_raw_##call *entry; \
  431. struct ring_buffer *buffer; \
  432. unsigned long irq_flags; \
  433. int __data_size; \
  434. int pc; \
  435. \
  436. local_save_flags(irq_flags); \
  437. pc = preempt_count(); \
  438. \
  439. __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
  440. \
  441. event = trace_current_buffer_lock_reserve(&buffer, \
  442. event_call->id, \
  443. sizeof(*entry) + __data_size, \
  444. irq_flags, pc); \
  445. if (!event) \
  446. return; \
  447. entry = ring_buffer_event_data(event); \
  448. \
  449. tstruct \
  450. \
  451. { assign; } \
  452. \
  453. if (!filter_current_check_discard(buffer, event_call, entry, event)) \
  454. trace_nowake_buffer_unlock_commit(buffer, \
  455. event, irq_flags, pc); \
  456. }
  457. /*
  458. * The ftrace_test_probe is compiled out, it is only here as a build time check
  459. * to make sure that if the tracepoint handling changes, the ftrace probe will
  460. * fail to compile unless it too is updated.
  461. */
  462. #undef DEFINE_EVENT
  463. #define DEFINE_EVENT(template, call, proto, args) \
  464. static struct trace_event_functions ftrace_event_type_funcs_##call = { \
  465. .trace = ftrace_raw_output_##call, \
  466. }; \
  467. static struct trace_event ftrace_event_type_##call = { \
  468. .funcs = &ftrace_event_type_funcs_##call, \
  469. }; \
  470. static inline void ftrace_test_probe_##call(void) \
  471. { \
  472. check_trace_callback_type_##call(ftrace_raw_event_##template); \
  473. }
  474. #undef DEFINE_EVENT_PRINT
  475. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  476. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  477. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  478. #undef __entry
  479. #define __entry REC
  480. #undef __print_flags
  481. #undef __print_symbolic
  482. #undef __get_dynamic_array
  483. #undef __get_str
  484. #undef TP_printk
  485. #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
  486. #undef DECLARE_EVENT_CLASS
  487. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  488. _TRACE_PERF_PROTO(call, PARAMS(proto)); \
  489. static const char print_fmt_##call[] = print; \
  490. static struct ftrace_event_class __used event_class_##call = { \
  491. .system = __stringify(TRACE_SYSTEM), \
  492. .define_fields = ftrace_define_fields_##call, \
  493. .fields = LIST_HEAD_INIT(event_class_##call.fields),\
  494. .raw_init = trace_event_raw_init, \
  495. .probe = ftrace_raw_event_##call, \
  496. _TRACE_PERF_INIT(call) \
  497. };
  498. #undef DEFINE_EVENT
  499. #define DEFINE_EVENT(template, call, proto, args) \
  500. \
  501. static struct ftrace_event_call __used \
  502. __attribute__((__aligned__(4))) \
  503. __attribute__((section("_ftrace_events"))) event_##call = { \
  504. .name = #call, \
  505. .class = &event_class_##template, \
  506. .event = &ftrace_event_type_##call, \
  507. .print_fmt = print_fmt_##template, \
  508. };
  509. #undef DEFINE_EVENT_PRINT
  510. #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
  511. \
  512. static const char print_fmt_##call[] = print; \
  513. \
  514. static struct ftrace_event_call __used \
  515. __attribute__((__aligned__(4))) \
  516. __attribute__((section("_ftrace_events"))) event_##call = { \
  517. .name = #call, \
  518. .class = &event_class_##template, \
  519. .event = &ftrace_event_type_##call, \
  520. .print_fmt = print_fmt_##call, \
  521. }
  522. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  523. /*
  524. * Define the insertion callback to perf events
  525. *
  526. * The job is very similar to ftrace_raw_event_<call> except that we don't
  527. * insert in the ring buffer but in a perf counter.
  528. *
  529. * static void ftrace_perf_<call>(proto)
  530. * {
  531. * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
  532. * struct ftrace_event_call *event_call = &event_<call>;
  533. * extern void perf_tp_event(int, u64, u64, void *, int);
  534. * struct ftrace_raw_##call *entry;
  535. * struct perf_trace_buf *trace_buf;
  536. * u64 __addr = 0, __count = 1;
  537. * unsigned long irq_flags;
  538. * struct trace_entry *ent;
  539. * int __entry_size;
  540. * int __data_size;
  541. * int __cpu
  542. * int pc;
  543. *
  544. * pc = preempt_count();
  545. *
  546. * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
  547. *
  548. * // Below we want to get the aligned size by taking into account
  549. * // the u32 field that will later store the buffer size
  550. * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
  551. * sizeof(u64));
  552. * __entry_size -= sizeof(u32);
  553. *
  554. * // Protect the non nmi buffer
  555. * // This also protects the rcu read side
  556. * local_irq_save(irq_flags);
  557. * __cpu = smp_processor_id();
  558. *
  559. * if (in_nmi())
  560. * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
  561. * else
  562. * trace_buf = rcu_dereference_sched(perf_trace_buf);
  563. *
  564. * if (!trace_buf)
  565. * goto end;
  566. *
  567. * trace_buf = per_cpu_ptr(trace_buf, __cpu);
  568. *
  569. * // Avoid recursion from perf that could mess up the buffer
  570. * if (trace_buf->recursion++)
  571. * goto end_recursion;
  572. *
  573. * raw_data = trace_buf->buf;
  574. *
  575. * // Make recursion update visible before entering perf_tp_event
  576. * // so that we protect from perf recursions.
  577. *
  578. * barrier();
  579. *
  580. * //zero dead bytes from alignment to avoid stack leak to userspace:
  581. * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
  582. * entry = (struct ftrace_raw_<call> *)raw_data;
  583. * ent = &entry->ent;
  584. * tracing_generic_entry_update(ent, irq_flags, pc);
  585. * ent->type = event_call->id;
  586. *
  587. * <tstruct> <- do some jobs with dynamic arrays
  588. *
  589. * <assign> <- affect our values
  590. *
  591. * perf_tp_event(event_call->id, __addr, __count, entry,
  592. * __entry_size); <- submit them to perf counter
  593. *
  594. * }
  595. */
  596. #ifdef CONFIG_PERF_EVENTS
  597. #undef __entry
  598. #define __entry entry
  599. #undef __get_dynamic_array
  600. #define __get_dynamic_array(field) \
  601. ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
  602. #undef __get_str
  603. #define __get_str(field) (char *)__get_dynamic_array(field)
  604. #undef __perf_addr
  605. #define __perf_addr(a) __addr = (a)
  606. #undef __perf_count
  607. #define __perf_count(c) __count = (c)
  608. #undef DECLARE_EVENT_CLASS
  609. #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
  610. static notrace void \
  611. perf_trace_##call(void *__data, proto) \
  612. { \
  613. struct ftrace_event_call *event_call = __data; \
  614. struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
  615. struct ftrace_raw_##call *entry; \
  616. u64 __addr = 0, __count = 1; \
  617. unsigned long irq_flags; \
  618. struct pt_regs *__regs; \
  619. int __entry_size; \
  620. int __data_size; \
  621. int rctx; \
  622. \
  623. __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
  624. __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
  625. sizeof(u64)); \
  626. __entry_size -= sizeof(u32); \
  627. \
  628. if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
  629. "profile buffer not large enough")) \
  630. return; \
  631. entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
  632. __entry_size, event_call->id, &rctx, &irq_flags); \
  633. if (!entry) \
  634. return; \
  635. tstruct \
  636. \
  637. { assign; } \
  638. \
  639. __regs = &__get_cpu_var(perf_trace_regs); \
  640. perf_fetch_caller_regs(__regs, 2); \
  641. \
  642. perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
  643. __count, irq_flags, __regs); \
  644. }
  645. /*
  646. * This part is compiled out, it is only here as a build time check
  647. * to make sure that if the tracepoint handling changes, the
  648. * perf probe will fail to compile unless it too is updated.
  649. */
  650. #undef DEFINE_EVENT
  651. #define DEFINE_EVENT(template, call, proto, args) \
  652. static inline void perf_test_probe_##call(void) \
  653. { \
  654. check_trace_callback_type_##call(perf_trace_##template); \
  655. \
  656. }
  657. #undef DEFINE_EVENT_PRINT
  658. #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
  659. DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  660. #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  661. #endif /* CONFIG_PERF_EVENTS */
  662. #undef _TRACE_PROFILE_INIT