1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Stage 1 of the trace events. 4 * 5 * Override the macros in the event tracepoint header <trace/events/XXX.h> 6 * to include the following: 7 * 8 * struct trace_event_raw_<call> { 9 * struct trace_entry ent; 10 * <type> <item>; 11 * <type2> <item2>[<len>]; 12 * [...] 13 * }; 14 * 15 * The <type> <item> is created by the __field(type, item) macro or 16 * the __array(type2, item2, len) macro. 17 * We simply do "type item;", and that will create the fields 18 * in the structure. 19 */ 20 21 #include <linux/trace_events.h> 22 23 #ifndef TRACE_SYSTEM_VAR 24 #define TRACE_SYSTEM_VAR TRACE_SYSTEM 25 #endif 26 27 #define __app__(x, y) str__##x##y 28 #define __app(x, y) __app__(x, y) 29 30 #define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name) 31 32 #define TRACE_MAKE_SYSTEM_STR() \ 33 static const char TRACE_SYSTEM_STRING[] = \ 34 __stringify(TRACE_SYSTEM) 35 36 TRACE_MAKE_SYSTEM_STR(); 37 38 #undef TRACE_DEFINE_ENUM 39 #define TRACE_DEFINE_ENUM(a) \ 40 static struct trace_eval_map __used __initdata \ 41 __##TRACE_SYSTEM##_##a = \ 42 { \ 43 .system = TRACE_SYSTEM_STRING, \ 44 .eval_string = #a, \ 45 .eval_value = a \ 46 }; \ 47 static struct trace_eval_map __used \ 48 __section("_ftrace_eval_map") \ 49 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a 50 51 #undef TRACE_DEFINE_SIZEOF 52 #define TRACE_DEFINE_SIZEOF(a) \ 53 static struct trace_eval_map __used __initdata \ 54 __##TRACE_SYSTEM##_##a = \ 55 { \ 56 .system = TRACE_SYSTEM_STRING, \ 57 .eval_string = "sizeof(" #a ")", \ 58 .eval_value = sizeof(a) \ 59 }; \ 60 static struct trace_eval_map __used \ 61 __section("_ftrace_eval_map") \ 62 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a 63 64 /* 65 * DECLARE_EVENT_CLASS can be used to add a generic function 66 * handlers for events. That is, if all events have the same 67 * parameters and just have distinct trace points. 68 * Each tracepoint can be defined with DEFINE_EVENT and that 69 * will map the DECLARE_EVENT_CLASS to the tracepoint. 70 * 71 * TRACE_EVENT is a one to one mapping between tracepoint and template. 72 */ 73 #undef TRACE_EVENT 74 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ 75 DECLARE_EVENT_CLASS(name, \ 76 PARAMS(proto), \ 77 PARAMS(args), \ 78 PARAMS(tstruct), \ 79 PARAMS(assign), \ 80 PARAMS(print)); \ 81 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); 82 83 84 #undef __field 85 #define __field(type, item) type item; 86 87 #undef __field_ext 88 #define __field_ext(type, item, filter_type) type item; 89 90 #undef __field_struct 91 #define __field_struct(type, item) type item; 92 93 #undef __field_struct_ext 94 #define __field_struct_ext(type, item, filter_type) type item; 95 96 #undef __array 97 #define __array(type, item, len) type item[len]; 98 99 #undef __dynamic_array 100 #define __dynamic_array(type, item, len) u32 __data_loc_##item; 101 102 #undef __string 103 #define __string(item, src) __dynamic_array(char, item, -1) 104 105 #undef __bitmask 106 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1) 107 108 #undef TP_STRUCT__entry 109 #define TP_STRUCT__entry(args...) args 110 111 #undef DECLARE_EVENT_CLASS 112 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 113 struct trace_event_raw_##name { \ 114 struct trace_entry ent; \ 115 tstruct \ 116 char __data[0]; \ 117 }; \ 118 \ 119 static struct trace_event_class event_class_##name; 120 121 #undef DEFINE_EVENT 122 #define DEFINE_EVENT(template, name, proto, args) \ 123 static struct trace_event_call __used \ 124 __attribute__((__aligned__(4))) event_##name 125 126 #undef DEFINE_EVENT_FN 127 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 128 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 129 130 #undef DEFINE_EVENT_PRINT 131 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 132 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 133 134 /* Callbacks are meaningless to ftrace. */ 135 #undef TRACE_EVENT_FN 136 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 137 assign, print, reg, unreg) \ 138 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 139 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 140 141 #undef TRACE_EVENT_FN_COND 142 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ 143 assign, print, reg, unreg) \ 144 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 145 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 146 147 #undef TRACE_EVENT_FLAGS 148 #define TRACE_EVENT_FLAGS(name, value) \ 149 __TRACE_EVENT_FLAGS(name, value) 150 151 #undef TRACE_EVENT_PERF_PERM 152 #define TRACE_EVENT_PERF_PERM(name, expr...) \ 153 __TRACE_EVENT_PERF_PERM(name, expr) 154 155 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 156 157 /* 158 * Stage 2 of the trace events. 159 * 160 * Include the following: 161 * 162 * struct trace_event_data_offsets_<call> { 163 * u32 <item1>; 164 * u32 <item2>; 165 * [...] 166 * }; 167 * 168 * The __dynamic_array() macro will create each u32 <item>, this is 169 * to keep the offset of each array from the beginning of the event. 170 * The size of an array is also encoded, in the higher 16 bits of <item>. 171 */ 172 173 #undef TRACE_DEFINE_ENUM 174 #define TRACE_DEFINE_ENUM(a) 175 176 #undef TRACE_DEFINE_SIZEOF 177 #define TRACE_DEFINE_SIZEOF(a) 178 179 #undef __field 180 #define __field(type, item) 181 182 #undef __field_ext 183 #define __field_ext(type, item, filter_type) 184 185 #undef __field_struct 186 #define __field_struct(type, item) 187 188 #undef __field_struct_ext 189 #define __field_struct_ext(type, item, filter_type) 190 191 #undef __array 192 #define __array(type, item, len) 193 194 #undef __dynamic_array 195 #define __dynamic_array(type, item, len) u32 item; 196 197 #undef __string 198 #define __string(item, src) __dynamic_array(char, item, -1) 199 200 #undef __bitmask 201 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 202 203 #undef DECLARE_EVENT_CLASS 204 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 205 struct trace_event_data_offsets_##call { \ 206 tstruct; \ 207 }; 208 209 #undef DEFINE_EVENT 210 #define DEFINE_EVENT(template, name, proto, args) 211 212 #undef DEFINE_EVENT_PRINT 213 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 214 215 #undef TRACE_EVENT_FLAGS 216 #define TRACE_EVENT_FLAGS(event, flag) 217 218 #undef TRACE_EVENT_PERF_PERM 219 #define TRACE_EVENT_PERF_PERM(event, expr...) 220 221 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 222 223 /* 224 * Stage 3 of the trace events. 225 * 226 * Override the macros in the event tracepoint header <trace/events/XXX.h> 227 * to include the following: 228 * 229 * enum print_line_t 230 * trace_raw_output_<call>(struct trace_iterator *iter, int flags) 231 * { 232 * struct trace_seq *s = &iter->seq; 233 * struct trace_event_raw_<call> *field; <-- defined in stage 1 234 * struct trace_seq *p = &iter->tmp_seq; 235 * 236 * -------(for event)------- 237 * 238 * struct trace_entry *entry; 239 * 240 * entry = iter->ent; 241 * 242 * if (entry->type != event_<call>->event.type) { 243 * WARN_ON_ONCE(1); 244 * return TRACE_TYPE_UNHANDLED; 245 * } 246 * 247 * field = (typeof(field))entry; 248 * 249 * trace_seq_init(p); 250 * return trace_output_call(iter, <call>, <TP_printk> "\n"); 251 * 252 * ------(or, for event class)------ 253 * 254 * int ret; 255 * 256 * field = (typeof(field))iter->ent; 257 * 258 * ret = trace_raw_output_prep(iter, trace_event); 259 * if (ret != TRACE_TYPE_HANDLED) 260 * return ret; 261 * 262 * trace_event_printf(iter, <TP_printk> "\n"); 263 * 264 * return trace_handle_return(s); 265 * ------- 266 * } 267 * 268 * This is the method used to print the raw event to the trace 269 * output format. Note, this is not needed if the data is read 270 * in binary. 271 */ 272 273 #undef __entry 274 #define __entry field 275 276 #undef TP_printk 277 #define TP_printk(fmt, args...) fmt "\n", args 278 279 #undef __get_dynamic_array 280 #define __get_dynamic_array(field) \ 281 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 282 283 #undef __get_dynamic_array_len 284 #define __get_dynamic_array_len(field) \ 285 ((__entry->__data_loc_##field >> 16) & 0xffff) 286 287 #undef __get_str 288 #define __get_str(field) ((char *)__get_dynamic_array(field)) 289 290 #undef __get_bitmask 291 #define __get_bitmask(field) \ 292 ({ \ 293 void *__bitmask = __get_dynamic_array(field); \ 294 unsigned int __bitmask_size; \ 295 __bitmask_size = __get_dynamic_array_len(field); \ 296 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 297 }) 298 299 #undef __print_flags 300 #define __print_flags(flag, delim, flag_array...) \ 301 ({ \ 302 static const struct trace_print_flags __flags[] = \ 303 { flag_array, { -1, NULL }}; \ 304 trace_print_flags_seq(p, delim, flag, __flags); \ 305 }) 306 307 #undef __print_symbolic 308 #define __print_symbolic(value, symbol_array...) \ 309 ({ \ 310 static const struct trace_print_flags symbols[] = \ 311 { symbol_array, { -1, NULL }}; \ 312 trace_print_symbols_seq(p, value, symbols); \ 313 }) 314 315 #undef __print_flags_u64 316 #undef __print_symbolic_u64 317 #if BITS_PER_LONG == 32 318 #define __print_flags_u64(flag, delim, flag_array...) \ 319 ({ \ 320 static const struct trace_print_flags_u64 __flags[] = \ 321 { flag_array, { -1, NULL } }; \ 322 trace_print_flags_seq_u64(p, delim, flag, __flags); \ 323 }) 324 325 #define __print_symbolic_u64(value, symbol_array...) \ 326 ({ \ 327 static const struct trace_print_flags_u64 symbols[] = \ 328 { symbol_array, { -1, NULL } }; \ 329 trace_print_symbols_seq_u64(p, value, symbols); \ 330 }) 331 #else 332 #define __print_flags_u64(flag, delim, flag_array...) \ 333 __print_flags(flag, delim, flag_array) 334 335 #define __print_symbolic_u64(value, symbol_array...) \ 336 __print_symbolic(value, symbol_array) 337 #endif 338 339 #undef __print_hex 340 #define __print_hex(buf, buf_len) \ 341 trace_print_hex_seq(p, buf, buf_len, false) 342 343 #undef __print_hex_str 344 #define __print_hex_str(buf, buf_len) \ 345 trace_print_hex_seq(p, buf, buf_len, true) 346 347 #undef __print_array 348 #define __print_array(array, count, el_size) \ 349 ({ \ 350 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ 351 el_size != 4 && el_size != 8); \ 352 trace_print_array_seq(p, array, count, el_size); \ 353 }) 354 355 #undef __print_hex_dump 356 #define __print_hex_dump(prefix_str, prefix_type, \ 357 rowsize, groupsize, buf, len, ascii) \ 358 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \ 359 rowsize, groupsize, buf, len, ascii) 360 361 #undef __print_ns_to_secs 362 #define __print_ns_to_secs(value) \ 363 ({ \ 364 u64 ____val = (u64)(value); \ 365 do_div(____val, NSEC_PER_SEC); \ 366 ____val; \ 367 }) 368 369 #undef __print_ns_without_secs 370 #define __print_ns_without_secs(value) \ 371 ({ \ 372 u64 ____val = (u64)(value); \ 373 (u32) do_div(____val, NSEC_PER_SEC); \ 374 }) 375 376 #undef DECLARE_EVENT_CLASS 377 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 378 static notrace enum print_line_t \ 379 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 380 struct trace_event *trace_event) \ 381 { \ 382 struct trace_seq *s = &iter->seq; \ 383 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 384 struct trace_event_raw_##call *field; \ 385 int ret; \ 386 \ 387 field = (typeof(field))iter->ent; \ 388 \ 389 ret = trace_raw_output_prep(iter, trace_event); \ 390 if (ret != TRACE_TYPE_HANDLED) \ 391 return ret; \ 392 \ 393 trace_event_printf(iter, print); \ 394 \ 395 return trace_handle_return(s); \ 396 } \ 397 static struct trace_event_functions trace_event_type_funcs_##call = { \ 398 .trace = trace_raw_output_##call, \ 399 }; 400 401 #undef DEFINE_EVENT_PRINT 402 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 403 static notrace enum print_line_t \ 404 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 405 struct trace_event *event) \ 406 { \ 407 struct trace_event_raw_##template *field; \ 408 struct trace_entry *entry; \ 409 struct trace_seq *p = &iter->tmp_seq; \ 410 \ 411 entry = iter->ent; \ 412 \ 413 if (entry->type != event_##call.event.type) { \ 414 WARN_ON_ONCE(1); \ 415 return TRACE_TYPE_UNHANDLED; \ 416 } \ 417 \ 418 field = (typeof(field))entry; \ 419 \ 420 trace_seq_init(p); \ 421 return trace_output_call(iter, #call, print); \ 422 } \ 423 static struct trace_event_functions trace_event_type_funcs_##call = { \ 424 .trace = trace_raw_output_##call, \ 425 }; 426 427 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 428 429 #undef __field_ext 430 #define __field_ext(_type, _item, _filter_type) { \ 431 .type = #_type, .name = #_item, \ 432 .size = sizeof(_type), .align = __alignof__(_type), \ 433 .is_signed = is_signed_type(_type), .filter_type = _filter_type }, 434 435 #undef __field_struct_ext 436 #define __field_struct_ext(_type, _item, _filter_type) { \ 437 .type = #_type, .name = #_item, \ 438 .size = sizeof(_type), .align = __alignof__(_type), \ 439 0, .filter_type = _filter_type }, 440 441 #undef __field 442 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 443 444 #undef __field_struct 445 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 446 447 #undef __array 448 #define __array(_type, _item, _len) { \ 449 .type = #_type"["__stringify(_len)"]", .name = #_item, \ 450 .size = sizeof(_type[_len]), .align = __alignof__(_type), \ 451 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 452 453 #undef __dynamic_array 454 #define __dynamic_array(_type, _item, _len) { \ 455 .type = "__data_loc " #_type "[]", .name = #_item, \ 456 .size = 4, .align = 4, \ 457 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 458 459 #undef __string 460 #define __string(item, src) __dynamic_array(char, item, -1) 461 462 #undef __bitmask 463 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 464 465 #undef DECLARE_EVENT_CLASS 466 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 467 static struct trace_event_fields trace_event_fields_##call[] = { \ 468 tstruct \ 469 {} }; 470 471 #undef DEFINE_EVENT_PRINT 472 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 473 474 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 475 476 /* 477 * remember the offset of each array from the beginning of the event. 478 */ 479 480 #undef __entry 481 #define __entry entry 482 483 #undef __field 484 #define __field(type, item) 485 486 #undef __field_ext 487 #define __field_ext(type, item, filter_type) 488 489 #undef __field_struct 490 #define __field_struct(type, item) 491 492 #undef __field_struct_ext 493 #define __field_struct_ext(type, item, filter_type) 494 495 #undef __array 496 #define __array(type, item, len) 497 498 #undef __dynamic_array 499 #define __dynamic_array(type, item, len) \ 500 __item_length = (len) * sizeof(type); \ 501 __data_offsets->item = __data_size + \ 502 offsetof(typeof(*entry), __data); \ 503 __data_offsets->item |= __item_length << 16; \ 504 __data_size += __item_length; 505 506 #undef __string 507 #define __string(item, src) __dynamic_array(char, item, \ 508 strlen((src) ? (const char *)(src) : "(null)") + 1) 509 510 /* 511 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 512 * num_possible_cpus(). 513 */ 514 #define __bitmask_size_in_bytes_raw(nr_bits) \ 515 (((nr_bits) + 7) / 8) 516 517 #define __bitmask_size_in_longs(nr_bits) \ 518 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 519 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 520 521 /* 522 * __bitmask_size_in_bytes is the number of bytes needed to hold 523 * num_possible_cpus() padded out to the nearest long. This is what 524 * is saved in the buffer, just to be consistent. 525 */ 526 #define __bitmask_size_in_bytes(nr_bits) \ 527 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 528 529 #undef __bitmask 530 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 531 __bitmask_size_in_longs(nr_bits)) 532 533 #undef DECLARE_EVENT_CLASS 534 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 535 static inline notrace int trace_event_get_offsets_##call( \ 536 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 537 { \ 538 int __data_size = 0; \ 539 int __maybe_unused __item_length; \ 540 struct trace_event_raw_##call __maybe_unused *entry; \ 541 \ 542 tstruct; \ 543 \ 544 return __data_size; \ 545 } 546 547 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 548 549 /* 550 * Stage 4 of the trace events. 551 * 552 * Override the macros in the event tracepoint header <trace/events/XXX.h> 553 * to include the following: 554 * 555 * For those macros defined with TRACE_EVENT: 556 * 557 * static struct trace_event_call event_<call>; 558 * 559 * static void trace_event_raw_event_<call>(void *__data, proto) 560 * { 561 * struct trace_event_file *trace_file = __data; 562 * struct trace_event_call *event_call = trace_file->event_call; 563 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 564 * unsigned long eflags = trace_file->flags; 565 * enum event_trigger_type __tt = ETT_NONE; 566 * struct ring_buffer_event *event; 567 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 568 * struct trace_buffer *buffer; 569 * unsigned long irq_flags; 570 * int __data_size; 571 * int pc; 572 * 573 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 574 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 575 * event_triggers_call(trace_file, NULL); 576 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 577 * return; 578 * } 579 * 580 * local_save_flags(irq_flags); 581 * pc = preempt_count(); 582 * 583 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 584 * 585 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 586 * event_<call>->event.type, 587 * sizeof(*entry) + __data_size, 588 * irq_flags, pc); 589 * if (!event) 590 * return; 591 * entry = ring_buffer_event_data(event); 592 * 593 * { <assign>; } <-- Here we assign the entries by the __field and 594 * __array macros. 595 * 596 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 597 * __tt = event_triggers_call(trace_file, entry); 598 * 599 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 600 * &trace_file->flags)) 601 * ring_buffer_discard_commit(buffer, event); 602 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 603 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 604 * 605 * if (__tt) 606 * event_triggers_post_call(trace_file, __tt); 607 * } 608 * 609 * static struct trace_event ftrace_event_type_<call> = { 610 * .trace = trace_raw_output_<call>, <-- stage 2 611 * }; 612 * 613 * static char print_fmt_<call>[] = <TP_printk>; 614 * 615 * static struct trace_event_class __used event_class_<template> = { 616 * .system = "<system>", 617 * .fields_array = trace_event_fields_<call>, 618 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 619 * .raw_init = trace_event_raw_init, 620 * .probe = trace_event_raw_event_##call, 621 * .reg = trace_event_reg, 622 * }; 623 * 624 * static struct trace_event_call event_<call> = { 625 * .class = event_class_<template>, 626 * { 627 * .tp = &__tracepoint_<call>, 628 * }, 629 * .event = &ftrace_event_type_<call>, 630 * .print_fmt = print_fmt_<call>, 631 * .flags = TRACE_EVENT_FL_TRACEPOINT, 632 * }; 633 * // its only safe to use pointers when doing linker tricks to 634 * // create an array. 635 * static struct trace_event_call __used 636 * __section("_ftrace_events") *__event_<call> = &event_<call>; 637 * 638 */ 639 640 #ifdef CONFIG_PERF_EVENTS 641 642 #define _TRACE_PERF_PROTO(call, proto) \ 643 static notrace void \ 644 perf_trace_##call(void *__data, proto); 645 646 #define _TRACE_PERF_INIT(call) \ 647 .perf_probe = perf_trace_##call, 648 649 #else 650 #define _TRACE_PERF_PROTO(call, proto) 651 #define _TRACE_PERF_INIT(call) 652 #endif /* CONFIG_PERF_EVENTS */ 653 654 #undef __entry 655 #define __entry entry 656 657 #undef __field 658 #define __field(type, item) 659 660 #undef __field_struct 661 #define __field_struct(type, item) 662 663 #undef __array 664 #define __array(type, item, len) 665 666 #undef __dynamic_array 667 #define __dynamic_array(type, item, len) \ 668 __entry->__data_loc_##item = __data_offsets.item; 669 670 #undef __string 671 #define __string(item, src) __dynamic_array(char, item, -1) 672 673 #undef __assign_str 674 #define __assign_str(dst, src) \ 675 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 676 677 #undef __bitmask 678 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 679 680 #undef __get_bitmask 681 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 682 683 #undef __assign_bitmask 684 #define __assign_bitmask(dst, src, nr_bits) \ 685 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 686 687 #undef TP_fast_assign 688 #define TP_fast_assign(args...) args 689 690 #undef __perf_count 691 #define __perf_count(c) (c) 692 693 #undef __perf_task 694 #define __perf_task(t) (t) 695 696 #undef DECLARE_EVENT_CLASS 697 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 698 \ 699 static notrace void \ 700 trace_event_raw_event_##call(void *__data, proto) \ 701 { \ 702 struct trace_event_file *trace_file = __data; \ 703 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 704 struct trace_event_buffer fbuffer; \ 705 struct trace_event_raw_##call *entry; \ 706 int __data_size; \ 707 \ 708 if (trace_trigger_soft_disabled(trace_file)) \ 709 return; \ 710 \ 711 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 712 \ 713 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 714 sizeof(*entry) + __data_size); \ 715 \ 716 if (!entry) \ 717 return; \ 718 \ 719 tstruct \ 720 \ 721 { assign; } \ 722 \ 723 trace_event_buffer_commit(&fbuffer); \ 724 } 725 /* 726 * The ftrace_test_probe is compiled out, it is only here as a build time check 727 * to make sure that if the tracepoint handling changes, the ftrace probe will 728 * fail to compile unless it too is updated. 729 */ 730 731 #undef DEFINE_EVENT 732 #define DEFINE_EVENT(template, call, proto, args) \ 733 static inline void ftrace_test_probe_##call(void) \ 734 { \ 735 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 736 } 737 738 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 739 740 #undef __entry 741 #define __entry REC 742 743 #undef __print_flags 744 #undef __print_symbolic 745 #undef __print_hex 746 #undef __print_hex_str 747 #undef __get_dynamic_array 748 #undef __get_dynamic_array_len 749 #undef __get_str 750 #undef __get_bitmask 751 #undef __print_array 752 #undef __print_hex_dump 753 754 /* 755 * The below is not executed in the kernel. It is only what is 756 * displayed in the print format for userspace to parse. 757 */ 758 #undef __print_ns_to_secs 759 #define __print_ns_to_secs(val) (val) / 1000000000UL 760 761 #undef __print_ns_without_secs 762 #define __print_ns_without_secs(val) (val) % 1000000000UL 763 764 #undef TP_printk 765 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 766 767 #undef DECLARE_EVENT_CLASS 768 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 769 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 770 static char print_fmt_##call[] = print; \ 771 static struct trace_event_class __used __refdata event_class_##call = { \ 772 .system = TRACE_SYSTEM_STRING, \ 773 .fields_array = trace_event_fields_##call, \ 774 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 775 .raw_init = trace_event_raw_init, \ 776 .probe = trace_event_raw_event_##call, \ 777 .reg = trace_event_reg, \ 778 _TRACE_PERF_INIT(call) \ 779 }; 780 781 #undef DEFINE_EVENT 782 #define DEFINE_EVENT(template, call, proto, args) \ 783 \ 784 static struct trace_event_call __used event_##call = { \ 785 .class = &event_class_##template, \ 786 { \ 787 .tp = &__tracepoint_##call, \ 788 }, \ 789 .event.funcs = &trace_event_type_funcs_##template, \ 790 .print_fmt = print_fmt_##template, \ 791 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 792 }; \ 793 static struct trace_event_call __used \ 794 __section("_ftrace_events") *__event_##call = &event_##call 795 796 #undef DEFINE_EVENT_PRINT 797 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 798 \ 799 static char print_fmt_##call[] = print; \ 800 \ 801 static struct trace_event_call __used event_##call = { \ 802 .class = &event_class_##template, \ 803 { \ 804 .tp = &__tracepoint_##call, \ 805 }, \ 806 .event.funcs = &trace_event_type_funcs_##call, \ 807 .print_fmt = print_fmt_##call, \ 808 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 809 }; \ 810 static struct trace_event_call __used \ 811 __section("_ftrace_events") *__event_##call = &event_##call 812 813 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 814