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 trace_event_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/trace_events.h> 20 21 #ifndef TRACE_SYSTEM_VAR 22 #define TRACE_SYSTEM_VAR TRACE_SYSTEM 23 #endif 24 25 #define __app__(x, y) str__##x##y 26 #define __app(x, y) __app__(x, y) 27 28 #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name) 29 30 #define TRACE_MAKE_SYSTEM_STR() \ 31 static const char TRACE_SYSTEM_STRING[] = \ 32 __stringify(TRACE_SYSTEM) 33 34 TRACE_MAKE_SYSTEM_STR(); 35 36 #undef TRACE_DEFINE_ENUM 37 #define TRACE_DEFINE_ENUM(a) \ 38 static struct trace_enum_map __used __initdata \ 39 __##TRACE_SYSTEM##_##a = \ 40 { \ 41 .system = TRACE_SYSTEM_STRING, \ 42 .enum_string = #a, \ 43 .enum_value = a \ 44 }; \ 45 static struct trace_enum_map __used \ 46 __attribute__((section("_ftrace_enum_map"))) \ 47 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a 48 49 /* 50 * DECLARE_EVENT_CLASS can be used to add a generic function 51 * handlers for events. That is, if all events have the same 52 * parameters and just have distinct trace points. 53 * Each tracepoint can be defined with DEFINE_EVENT and that 54 * will map the DECLARE_EVENT_CLASS to the tracepoint. 55 * 56 * TRACE_EVENT is a one to one mapping between tracepoint and template. 57 */ 58 #undef TRACE_EVENT 59 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ 60 DECLARE_EVENT_CLASS(name, \ 61 PARAMS(proto), \ 62 PARAMS(args), \ 63 PARAMS(tstruct), \ 64 PARAMS(assign), \ 65 PARAMS(print)); \ 66 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); 67 68 69 #undef __field 70 #define __field(type, item) type item; 71 72 #undef __field_ext 73 #define __field_ext(type, item, filter_type) type item; 74 75 #undef __field_struct 76 #define __field_struct(type, item) type item; 77 78 #undef __field_struct_ext 79 #define __field_struct_ext(type, item, filter_type) type item; 80 81 #undef __array 82 #define __array(type, item, len) type item[len]; 83 84 #undef __dynamic_array 85 #define __dynamic_array(type, item, len) u32 __data_loc_##item; 86 87 #undef __string 88 #define __string(item, src) __dynamic_array(char, item, -1) 89 90 #undef __bitmask 91 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1) 92 93 #undef TP_STRUCT__entry 94 #define TP_STRUCT__entry(args...) args 95 96 #undef DECLARE_EVENT_CLASS 97 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 98 struct trace_event_raw_##name { \ 99 struct trace_entry ent; \ 100 tstruct \ 101 char __data[0]; \ 102 }; \ 103 \ 104 static struct trace_event_class event_class_##name; 105 106 #undef DEFINE_EVENT 107 #define DEFINE_EVENT(template, name, proto, args) \ 108 static struct trace_event_call __used \ 109 __attribute__((__aligned__(4))) event_##name 110 111 #undef DEFINE_EVENT_FN 112 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 113 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 114 115 #undef DEFINE_EVENT_PRINT 116 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 117 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 118 119 /* Callbacks are meaningless to ftrace. */ 120 #undef TRACE_EVENT_FN 121 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 122 assign, print, reg, unreg) \ 123 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 124 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 125 126 #undef TRACE_EVENT_FN_COND 127 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ 128 assign, print, reg, unreg) \ 129 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 130 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 131 132 #undef TRACE_EVENT_FLAGS 133 #define TRACE_EVENT_FLAGS(name, value) \ 134 __TRACE_EVENT_FLAGS(name, value) 135 136 #undef TRACE_EVENT_PERF_PERM 137 #define TRACE_EVENT_PERF_PERM(name, expr...) \ 138 __TRACE_EVENT_PERF_PERM(name, expr) 139 140 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 141 142 /* 143 * Stage 2 of the trace events. 144 * 145 * Include the following: 146 * 147 * struct trace_event_data_offsets_<call> { 148 * u32 <item1>; 149 * u32 <item2>; 150 * [...] 151 * }; 152 * 153 * The __dynamic_array() macro will create each u32 <item>, this is 154 * to keep the offset of each array from the beginning of the event. 155 * The size of an array is also encoded, in the higher 16 bits of <item>. 156 */ 157 158 #undef TRACE_DEFINE_ENUM 159 #define TRACE_DEFINE_ENUM(a) 160 161 #undef __field 162 #define __field(type, item) 163 164 #undef __field_ext 165 #define __field_ext(type, item, filter_type) 166 167 #undef __field_struct 168 #define __field_struct(type, item) 169 170 #undef __field_struct_ext 171 #define __field_struct_ext(type, item, filter_type) 172 173 #undef __array 174 #define __array(type, item, len) 175 176 #undef __dynamic_array 177 #define __dynamic_array(type, item, len) u32 item; 178 179 #undef __string 180 #define __string(item, src) __dynamic_array(char, item, -1) 181 182 #undef __bitmask 183 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 184 185 #undef DECLARE_EVENT_CLASS 186 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 187 struct trace_event_data_offsets_##call { \ 188 tstruct; \ 189 }; 190 191 #undef DEFINE_EVENT 192 #define DEFINE_EVENT(template, name, proto, args) 193 194 #undef DEFINE_EVENT_PRINT 195 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 196 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 197 198 #undef TRACE_EVENT_FLAGS 199 #define TRACE_EVENT_FLAGS(event, flag) 200 201 #undef TRACE_EVENT_PERF_PERM 202 #define TRACE_EVENT_PERF_PERM(event, expr...) 203 204 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 205 206 /* 207 * Stage 3 of the trace events. 208 * 209 * Override the macros in <trace/trace_events.h> to include the following: 210 * 211 * enum print_line_t 212 * trace_raw_output_<call>(struct trace_iterator *iter, int flags) 213 * { 214 * struct trace_seq *s = &iter->seq; 215 * struct trace_event_raw_<call> *field; <-- defined in stage 1 216 * struct trace_entry *entry; 217 * struct trace_seq *p = &iter->tmp_seq; 218 * int ret; 219 * 220 * entry = iter->ent; 221 * 222 * if (entry->type != event_<call>->event.type) { 223 * WARN_ON_ONCE(1); 224 * return TRACE_TYPE_UNHANDLED; 225 * } 226 * 227 * field = (typeof(field))entry; 228 * 229 * trace_seq_init(p); 230 * ret = trace_seq_printf(s, "%s: ", <call>); 231 * if (ret) 232 * ret = trace_seq_printf(s, <TP_printk> "\n"); 233 * if (!ret) 234 * return TRACE_TYPE_PARTIAL_LINE; 235 * 236 * return TRACE_TYPE_HANDLED; 237 * } 238 * 239 * This is the method used to print the raw event to the trace 240 * output format. Note, this is not needed if the data is read 241 * in binary. 242 */ 243 244 #undef __entry 245 #define __entry field 246 247 #undef TP_printk 248 #define TP_printk(fmt, args...) fmt "\n", args 249 250 #undef __get_dynamic_array 251 #define __get_dynamic_array(field) \ 252 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 253 254 #undef __get_dynamic_array_len 255 #define __get_dynamic_array_len(field) \ 256 ((__entry->__data_loc_##field >> 16) & 0xffff) 257 258 #undef __get_str 259 #define __get_str(field) ((char *)__get_dynamic_array(field)) 260 261 #undef __get_bitmask 262 #define __get_bitmask(field) \ 263 ({ \ 264 void *__bitmask = __get_dynamic_array(field); \ 265 unsigned int __bitmask_size; \ 266 __bitmask_size = __get_dynamic_array_len(field); \ 267 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 268 }) 269 270 #undef __print_flags 271 #define __print_flags(flag, delim, flag_array...) \ 272 ({ \ 273 static const struct trace_print_flags __flags[] = \ 274 { flag_array, { -1, NULL }}; \ 275 trace_print_flags_seq(p, delim, flag, __flags); \ 276 }) 277 278 #undef __print_symbolic 279 #define __print_symbolic(value, symbol_array...) \ 280 ({ \ 281 static const struct trace_print_flags symbols[] = \ 282 { symbol_array, { -1, NULL }}; \ 283 trace_print_symbols_seq(p, value, symbols); \ 284 }) 285 286 #undef __print_symbolic_u64 287 #if BITS_PER_LONG == 32 288 #define __print_symbolic_u64(value, symbol_array...) \ 289 ({ \ 290 static const struct trace_print_flags_u64 symbols[] = \ 291 { symbol_array, { -1, NULL } }; \ 292 trace_print_symbols_seq_u64(p, value, symbols); \ 293 }) 294 #else 295 #define __print_symbolic_u64(value, symbol_array...) \ 296 __print_symbolic(value, symbol_array) 297 #endif 298 299 #undef __print_hex 300 #define __print_hex(buf, buf_len) \ 301 trace_print_hex_seq(p, buf, buf_len, false) 302 303 #undef __print_hex_str 304 #define __print_hex_str(buf, buf_len) \ 305 trace_print_hex_seq(p, buf, buf_len, true) 306 307 #undef __print_array 308 #define __print_array(array, count, el_size) \ 309 ({ \ 310 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ 311 el_size != 4 && el_size != 8); \ 312 trace_print_array_seq(p, array, count, el_size); \ 313 }) 314 315 #undef DECLARE_EVENT_CLASS 316 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 317 static notrace enum print_line_t \ 318 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 319 struct trace_event *trace_event) \ 320 { \ 321 struct trace_seq *s = &iter->seq; \ 322 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 323 struct trace_event_raw_##call *field; \ 324 int ret; \ 325 \ 326 field = (typeof(field))iter->ent; \ 327 \ 328 ret = trace_raw_output_prep(iter, trace_event); \ 329 if (ret != TRACE_TYPE_HANDLED) \ 330 return ret; \ 331 \ 332 trace_seq_printf(s, print); \ 333 \ 334 return trace_handle_return(s); \ 335 } \ 336 static struct trace_event_functions trace_event_type_funcs_##call = { \ 337 .trace = trace_raw_output_##call, \ 338 }; 339 340 #undef DEFINE_EVENT_PRINT 341 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 342 static notrace enum print_line_t \ 343 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 344 struct trace_event *event) \ 345 { \ 346 struct trace_event_raw_##template *field; \ 347 struct trace_entry *entry; \ 348 struct trace_seq *p = &iter->tmp_seq; \ 349 \ 350 entry = iter->ent; \ 351 \ 352 if (entry->type != event_##call.event.type) { \ 353 WARN_ON_ONCE(1); \ 354 return TRACE_TYPE_UNHANDLED; \ 355 } \ 356 \ 357 field = (typeof(field))entry; \ 358 \ 359 trace_seq_init(p); \ 360 return trace_output_call(iter, #call, print); \ 361 } \ 362 static struct trace_event_functions trace_event_type_funcs_##call = { \ 363 .trace = trace_raw_output_##call, \ 364 }; 365 366 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 367 368 #undef __field_ext 369 #define __field_ext(type, item, filter_type) \ 370 ret = trace_define_field(event_call, #type, #item, \ 371 offsetof(typeof(field), item), \ 372 sizeof(field.item), \ 373 is_signed_type(type), filter_type); \ 374 if (ret) \ 375 return ret; 376 377 #undef __field_struct_ext 378 #define __field_struct_ext(type, item, filter_type) \ 379 ret = trace_define_field(event_call, #type, #item, \ 380 offsetof(typeof(field), item), \ 381 sizeof(field.item), \ 382 0, filter_type); \ 383 if (ret) \ 384 return ret; 385 386 #undef __field 387 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 388 389 #undef __field_struct 390 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 391 392 #undef __array 393 #define __array(type, item, len) \ 394 do { \ 395 char *type_str = #type"["__stringify(len)"]"; \ 396 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 397 ret = trace_define_field(event_call, type_str, #item, \ 398 offsetof(typeof(field), item), \ 399 sizeof(field.item), \ 400 is_signed_type(type), FILTER_OTHER); \ 401 if (ret) \ 402 return ret; \ 403 } while (0); 404 405 #undef __dynamic_array 406 #define __dynamic_array(type, item, len) \ 407 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ 408 offsetof(typeof(field), __data_loc_##item), \ 409 sizeof(field.__data_loc_##item), \ 410 is_signed_type(type), FILTER_OTHER); 411 412 #undef __string 413 #define __string(item, src) __dynamic_array(char, item, -1) 414 415 #undef __bitmask 416 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 417 418 #undef DECLARE_EVENT_CLASS 419 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 420 static int notrace __init \ 421 trace_event_define_fields_##call(struct trace_event_call *event_call) \ 422 { \ 423 struct trace_event_raw_##call field; \ 424 int ret; \ 425 \ 426 tstruct; \ 427 \ 428 return ret; \ 429 } 430 431 #undef DEFINE_EVENT 432 #define DEFINE_EVENT(template, name, proto, args) 433 434 #undef DEFINE_EVENT_PRINT 435 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 436 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 437 438 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 439 440 /* 441 * remember the offset of each array from the beginning of the event. 442 */ 443 444 #undef __entry 445 #define __entry entry 446 447 #undef __field 448 #define __field(type, item) 449 450 #undef __field_ext 451 #define __field_ext(type, item, filter_type) 452 453 #undef __field_struct 454 #define __field_struct(type, item) 455 456 #undef __field_struct_ext 457 #define __field_struct_ext(type, item, filter_type) 458 459 #undef __array 460 #define __array(type, item, len) 461 462 #undef __dynamic_array 463 #define __dynamic_array(type, item, len) \ 464 __item_length = (len) * sizeof(type); \ 465 __data_offsets->item = __data_size + \ 466 offsetof(typeof(*entry), __data); \ 467 __data_offsets->item |= __item_length << 16; \ 468 __data_size += __item_length; 469 470 #undef __string 471 #define __string(item, src) __dynamic_array(char, item, \ 472 strlen((src) ? (const char *)(src) : "(null)") + 1) 473 474 /* 475 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 476 * num_possible_cpus(). 477 */ 478 #define __bitmask_size_in_bytes_raw(nr_bits) \ 479 (((nr_bits) + 7) / 8) 480 481 #define __bitmask_size_in_longs(nr_bits) \ 482 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 483 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 484 485 /* 486 * __bitmask_size_in_bytes is the number of bytes needed to hold 487 * num_possible_cpus() padded out to the nearest long. This is what 488 * is saved in the buffer, just to be consistent. 489 */ 490 #define __bitmask_size_in_bytes(nr_bits) \ 491 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 492 493 #undef __bitmask 494 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 495 __bitmask_size_in_longs(nr_bits)) 496 497 #undef DECLARE_EVENT_CLASS 498 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 499 static inline notrace int trace_event_get_offsets_##call( \ 500 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 501 { \ 502 int __data_size = 0; \ 503 int __maybe_unused __item_length; \ 504 struct trace_event_raw_##call __maybe_unused *entry; \ 505 \ 506 tstruct; \ 507 \ 508 return __data_size; \ 509 } 510 511 #undef DEFINE_EVENT 512 #define DEFINE_EVENT(template, name, proto, args) 513 514 #undef DEFINE_EVENT_PRINT 515 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 516 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 517 518 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 519 520 /* 521 * Stage 4 of the trace events. 522 * 523 * Override the macros in <trace/trace_events.h> to include the following: 524 * 525 * For those macros defined with TRACE_EVENT: 526 * 527 * static struct trace_event_call event_<call>; 528 * 529 * static void trace_event_raw_event_<call>(void *__data, proto) 530 * { 531 * struct trace_event_file *trace_file = __data; 532 * struct trace_event_call *event_call = trace_file->event_call; 533 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 534 * unsigned long eflags = trace_file->flags; 535 * enum event_trigger_type __tt = ETT_NONE; 536 * struct ring_buffer_event *event; 537 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 538 * struct ring_buffer *buffer; 539 * unsigned long irq_flags; 540 * int __data_size; 541 * int pc; 542 * 543 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 544 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 545 * event_triggers_call(trace_file, NULL); 546 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 547 * return; 548 * } 549 * 550 * local_save_flags(irq_flags); 551 * pc = preempt_count(); 552 * 553 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 554 * 555 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 556 * event_<call>->event.type, 557 * sizeof(*entry) + __data_size, 558 * irq_flags, pc); 559 * if (!event) 560 * return; 561 * entry = ring_buffer_event_data(event); 562 * 563 * { <assign>; } <-- Here we assign the entries by the __field and 564 * __array macros. 565 * 566 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 567 * __tt = event_triggers_call(trace_file, entry); 568 * 569 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 570 * &trace_file->flags)) 571 * ring_buffer_discard_commit(buffer, event); 572 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 573 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 574 * 575 * if (__tt) 576 * event_triggers_post_call(trace_file, __tt); 577 * } 578 * 579 * static struct trace_event ftrace_event_type_<call> = { 580 * .trace = trace_raw_output_<call>, <-- stage 2 581 * }; 582 * 583 * static char print_fmt_<call>[] = <TP_printk>; 584 * 585 * static struct trace_event_class __used event_class_<template> = { 586 * .system = "<system>", 587 * .define_fields = trace_event_define_fields_<call>, 588 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 589 * .raw_init = trace_event_raw_init, 590 * .probe = trace_event_raw_event_##call, 591 * .reg = trace_event_reg, 592 * }; 593 * 594 * static struct trace_event_call event_<call> = { 595 * .class = event_class_<template>, 596 * { 597 * .tp = &__tracepoint_<call>, 598 * }, 599 * .event = &ftrace_event_type_<call>, 600 * .print_fmt = print_fmt_<call>, 601 * .flags = TRACE_EVENT_FL_TRACEPOINT, 602 * }; 603 * // its only safe to use pointers when doing linker tricks to 604 * // create an array. 605 * static struct trace_event_call __used 606 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>; 607 * 608 */ 609 610 #ifdef CONFIG_PERF_EVENTS 611 612 #define _TRACE_PERF_PROTO(call, proto) \ 613 static notrace void \ 614 perf_trace_##call(void *__data, proto); 615 616 #define _TRACE_PERF_INIT(call) \ 617 .perf_probe = perf_trace_##call, 618 619 #else 620 #define _TRACE_PERF_PROTO(call, proto) 621 #define _TRACE_PERF_INIT(call) 622 #endif /* CONFIG_PERF_EVENTS */ 623 624 #undef __entry 625 #define __entry entry 626 627 #undef __field 628 #define __field(type, item) 629 630 #undef __field_struct 631 #define __field_struct(type, item) 632 633 #undef __array 634 #define __array(type, item, len) 635 636 #undef __dynamic_array 637 #define __dynamic_array(type, item, len) \ 638 __entry->__data_loc_##item = __data_offsets.item; 639 640 #undef __string 641 #define __string(item, src) __dynamic_array(char, item, -1) 642 643 #undef __assign_str 644 #define __assign_str(dst, src) \ 645 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 646 647 #undef __bitmask 648 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 649 650 #undef __get_bitmask 651 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 652 653 #undef __assign_bitmask 654 #define __assign_bitmask(dst, src, nr_bits) \ 655 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 656 657 #undef TP_fast_assign 658 #define TP_fast_assign(args...) args 659 660 #undef __perf_count 661 #define __perf_count(c) (c) 662 663 #undef __perf_task 664 #define __perf_task(t) (t) 665 666 #undef DECLARE_EVENT_CLASS 667 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 668 \ 669 static notrace void \ 670 trace_event_raw_event_##call(void *__data, proto) \ 671 { \ 672 struct trace_event_file *trace_file = __data; \ 673 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 674 struct trace_event_buffer fbuffer; \ 675 struct trace_event_raw_##call *entry; \ 676 int __data_size; \ 677 \ 678 if (trace_trigger_soft_disabled(trace_file)) \ 679 return; \ 680 \ 681 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 682 \ 683 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 684 sizeof(*entry) + __data_size); \ 685 \ 686 if (!entry) \ 687 return; \ 688 \ 689 tstruct \ 690 \ 691 { assign; } \ 692 \ 693 trace_event_buffer_commit(&fbuffer); \ 694 } 695 /* 696 * The ftrace_test_probe is compiled out, it is only here as a build time check 697 * to make sure that if the tracepoint handling changes, the ftrace probe will 698 * fail to compile unless it too is updated. 699 */ 700 701 #undef DEFINE_EVENT 702 #define DEFINE_EVENT(template, call, proto, args) \ 703 static inline void ftrace_test_probe_##call(void) \ 704 { \ 705 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 706 } 707 708 #undef DEFINE_EVENT_PRINT 709 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 710 711 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 712 713 #undef __entry 714 #define __entry REC 715 716 #undef __print_flags 717 #undef __print_symbolic 718 #undef __print_hex 719 #undef __print_hex_str 720 #undef __get_dynamic_array 721 #undef __get_dynamic_array_len 722 #undef __get_str 723 #undef __get_bitmask 724 #undef __print_array 725 726 #undef TP_printk 727 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 728 729 #undef DECLARE_EVENT_CLASS 730 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 731 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 732 static char print_fmt_##call[] = print; \ 733 static struct trace_event_class __used __refdata event_class_##call = { \ 734 .system = TRACE_SYSTEM_STRING, \ 735 .define_fields = trace_event_define_fields_##call, \ 736 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 737 .raw_init = trace_event_raw_init, \ 738 .probe = trace_event_raw_event_##call, \ 739 .reg = trace_event_reg, \ 740 _TRACE_PERF_INIT(call) \ 741 }; 742 743 #undef DEFINE_EVENT 744 #define DEFINE_EVENT(template, call, proto, args) \ 745 \ 746 static struct trace_event_call __used event_##call = { \ 747 .class = &event_class_##template, \ 748 { \ 749 .tp = &__tracepoint_##call, \ 750 }, \ 751 .event.funcs = &trace_event_type_funcs_##template, \ 752 .print_fmt = print_fmt_##template, \ 753 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 754 }; \ 755 static struct trace_event_call __used \ 756 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call 757 758 #undef DEFINE_EVENT_PRINT 759 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 760 \ 761 static char print_fmt_##call[] = print; \ 762 \ 763 static struct trace_event_call __used event_##call = { \ 764 .class = &event_class_##template, \ 765 { \ 766 .tp = &__tracepoint_##call, \ 767 }, \ 768 .event.funcs = &trace_event_type_funcs_##call, \ 769 .print_fmt = print_fmt_##call, \ 770 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 771 }; \ 772 static struct trace_event_call __used \ 773 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call 774 775 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 776