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 __string_len 106 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 107 108 #undef __bitmask 109 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1) 110 111 #undef TP_STRUCT__entry 112 #define TP_STRUCT__entry(args...) args 113 114 #undef DECLARE_EVENT_CLASS 115 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 116 struct trace_event_raw_##name { \ 117 struct trace_entry ent; \ 118 tstruct \ 119 char __data[0]; \ 120 }; \ 121 \ 122 static struct trace_event_class event_class_##name; 123 124 #undef DEFINE_EVENT 125 #define DEFINE_EVENT(template, name, proto, args) \ 126 static struct trace_event_call __used \ 127 __attribute__((__aligned__(4))) event_##name 128 129 #undef DEFINE_EVENT_FN 130 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 131 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 132 133 #undef DEFINE_EVENT_PRINT 134 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 135 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 136 137 /* Callbacks are meaningless to ftrace. */ 138 #undef TRACE_EVENT_FN 139 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 140 assign, print, reg, unreg) \ 141 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 142 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 143 144 #undef TRACE_EVENT_FN_COND 145 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ 146 assign, print, reg, unreg) \ 147 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 148 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 149 150 #undef TRACE_EVENT_FLAGS 151 #define TRACE_EVENT_FLAGS(name, value) \ 152 __TRACE_EVENT_FLAGS(name, value) 153 154 #undef TRACE_EVENT_PERF_PERM 155 #define TRACE_EVENT_PERF_PERM(name, expr...) \ 156 __TRACE_EVENT_PERF_PERM(name, expr) 157 158 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 159 160 /* 161 * Stage 2 of the trace events. 162 * 163 * Include the following: 164 * 165 * struct trace_event_data_offsets_<call> { 166 * u32 <item1>; 167 * u32 <item2>; 168 * [...] 169 * }; 170 * 171 * The __dynamic_array() macro will create each u32 <item>, this is 172 * to keep the offset of each array from the beginning of the event. 173 * The size of an array is also encoded, in the higher 16 bits of <item>. 174 */ 175 176 #undef TRACE_DEFINE_ENUM 177 #define TRACE_DEFINE_ENUM(a) 178 179 #undef TRACE_DEFINE_SIZEOF 180 #define TRACE_DEFINE_SIZEOF(a) 181 182 #undef __field 183 #define __field(type, item) 184 185 #undef __field_ext 186 #define __field_ext(type, item, filter_type) 187 188 #undef __field_struct 189 #define __field_struct(type, item) 190 191 #undef __field_struct_ext 192 #define __field_struct_ext(type, item, filter_type) 193 194 #undef __array 195 #define __array(type, item, len) 196 197 #undef __dynamic_array 198 #define __dynamic_array(type, item, len) u32 item; 199 200 #undef __string 201 #define __string(item, src) __dynamic_array(char, item, -1) 202 203 #undef __string_len 204 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 205 206 #undef __bitmask 207 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 208 209 #undef DECLARE_EVENT_CLASS 210 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 211 struct trace_event_data_offsets_##call { \ 212 tstruct; \ 213 }; 214 215 #undef DEFINE_EVENT 216 #define DEFINE_EVENT(template, name, proto, args) 217 218 #undef DEFINE_EVENT_PRINT 219 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 220 221 #undef TRACE_EVENT_FLAGS 222 #define TRACE_EVENT_FLAGS(event, flag) 223 224 #undef TRACE_EVENT_PERF_PERM 225 #define TRACE_EVENT_PERF_PERM(event, expr...) 226 227 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 228 229 /* 230 * Stage 3 of the trace events. 231 * 232 * Override the macros in the event tracepoint header <trace/events/XXX.h> 233 * to include the following: 234 * 235 * enum print_line_t 236 * trace_raw_output_<call>(struct trace_iterator *iter, int flags) 237 * { 238 * struct trace_seq *s = &iter->seq; 239 * struct trace_event_raw_<call> *field; <-- defined in stage 1 240 * struct trace_seq *p = &iter->tmp_seq; 241 * 242 * -------(for event)------- 243 * 244 * struct trace_entry *entry; 245 * 246 * entry = iter->ent; 247 * 248 * if (entry->type != event_<call>->event.type) { 249 * WARN_ON_ONCE(1); 250 * return TRACE_TYPE_UNHANDLED; 251 * } 252 * 253 * field = (typeof(field))entry; 254 * 255 * trace_seq_init(p); 256 * return trace_output_call(iter, <call>, <TP_printk> "\n"); 257 * 258 * ------(or, for event class)------ 259 * 260 * int ret; 261 * 262 * field = (typeof(field))iter->ent; 263 * 264 * ret = trace_raw_output_prep(iter, trace_event); 265 * if (ret != TRACE_TYPE_HANDLED) 266 * return ret; 267 * 268 * trace_event_printf(iter, <TP_printk> "\n"); 269 * 270 * return trace_handle_return(s); 271 * ------- 272 * } 273 * 274 * This is the method used to print the raw event to the trace 275 * output format. Note, this is not needed if the data is read 276 * in binary. 277 */ 278 279 #undef __entry 280 #define __entry field 281 282 #undef TP_printk 283 #define TP_printk(fmt, args...) fmt "\n", args 284 285 #undef __get_dynamic_array 286 #define __get_dynamic_array(field) \ 287 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 288 289 #undef __get_dynamic_array_len 290 #define __get_dynamic_array_len(field) \ 291 ((__entry->__data_loc_##field >> 16) & 0xffff) 292 293 #undef __get_str 294 #define __get_str(field) ((char *)__get_dynamic_array(field)) 295 296 #undef __get_bitmask 297 #define __get_bitmask(field) \ 298 ({ \ 299 void *__bitmask = __get_dynamic_array(field); \ 300 unsigned int __bitmask_size; \ 301 __bitmask_size = __get_dynamic_array_len(field); \ 302 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 303 }) 304 305 #undef __print_flags 306 #define __print_flags(flag, delim, flag_array...) \ 307 ({ \ 308 static const struct trace_print_flags __flags[] = \ 309 { flag_array, { -1, NULL }}; \ 310 trace_print_flags_seq(p, delim, flag, __flags); \ 311 }) 312 313 #undef __print_symbolic 314 #define __print_symbolic(value, symbol_array...) \ 315 ({ \ 316 static const struct trace_print_flags symbols[] = \ 317 { symbol_array, { -1, NULL }}; \ 318 trace_print_symbols_seq(p, value, symbols); \ 319 }) 320 321 #undef __print_flags_u64 322 #undef __print_symbolic_u64 323 #if BITS_PER_LONG == 32 324 #define __print_flags_u64(flag, delim, flag_array...) \ 325 ({ \ 326 static const struct trace_print_flags_u64 __flags[] = \ 327 { flag_array, { -1, NULL } }; \ 328 trace_print_flags_seq_u64(p, delim, flag, __flags); \ 329 }) 330 331 #define __print_symbolic_u64(value, symbol_array...) \ 332 ({ \ 333 static const struct trace_print_flags_u64 symbols[] = \ 334 { symbol_array, { -1, NULL } }; \ 335 trace_print_symbols_seq_u64(p, value, symbols); \ 336 }) 337 #else 338 #define __print_flags_u64(flag, delim, flag_array...) \ 339 __print_flags(flag, delim, flag_array) 340 341 #define __print_symbolic_u64(value, symbol_array...) \ 342 __print_symbolic(value, symbol_array) 343 #endif 344 345 #undef __print_hex 346 #define __print_hex(buf, buf_len) \ 347 trace_print_hex_seq(p, buf, buf_len, false) 348 349 #undef __print_hex_str 350 #define __print_hex_str(buf, buf_len) \ 351 trace_print_hex_seq(p, buf, buf_len, true) 352 353 #undef __print_array 354 #define __print_array(array, count, el_size) \ 355 ({ \ 356 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ 357 el_size != 4 && el_size != 8); \ 358 trace_print_array_seq(p, array, count, el_size); \ 359 }) 360 361 #undef __print_hex_dump 362 #define __print_hex_dump(prefix_str, prefix_type, \ 363 rowsize, groupsize, buf, len, ascii) \ 364 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \ 365 rowsize, groupsize, buf, len, ascii) 366 367 #undef __print_ns_to_secs 368 #define __print_ns_to_secs(value) \ 369 ({ \ 370 u64 ____val = (u64)(value); \ 371 do_div(____val, NSEC_PER_SEC); \ 372 ____val; \ 373 }) 374 375 #undef __print_ns_without_secs 376 #define __print_ns_without_secs(value) \ 377 ({ \ 378 u64 ____val = (u64)(value); \ 379 (u32) do_div(____val, NSEC_PER_SEC); \ 380 }) 381 382 #undef DECLARE_EVENT_CLASS 383 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 384 static notrace enum print_line_t \ 385 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 386 struct trace_event *trace_event) \ 387 { \ 388 struct trace_seq *s = &iter->seq; \ 389 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 390 struct trace_event_raw_##call *field; \ 391 int ret; \ 392 \ 393 field = (typeof(field))iter->ent; \ 394 \ 395 ret = trace_raw_output_prep(iter, trace_event); \ 396 if (ret != TRACE_TYPE_HANDLED) \ 397 return ret; \ 398 \ 399 trace_event_printf(iter, print); \ 400 \ 401 return trace_handle_return(s); \ 402 } \ 403 static struct trace_event_functions trace_event_type_funcs_##call = { \ 404 .trace = trace_raw_output_##call, \ 405 }; 406 407 #undef DEFINE_EVENT_PRINT 408 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 409 static notrace enum print_line_t \ 410 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 411 struct trace_event *event) \ 412 { \ 413 struct trace_event_raw_##template *field; \ 414 struct trace_entry *entry; \ 415 struct trace_seq *p = &iter->tmp_seq; \ 416 \ 417 entry = iter->ent; \ 418 \ 419 if (entry->type != event_##call.event.type) { \ 420 WARN_ON_ONCE(1); \ 421 return TRACE_TYPE_UNHANDLED; \ 422 } \ 423 \ 424 field = (typeof(field))entry; \ 425 \ 426 trace_seq_init(p); \ 427 return trace_output_call(iter, #call, print); \ 428 } \ 429 static struct trace_event_functions trace_event_type_funcs_##call = { \ 430 .trace = trace_raw_output_##call, \ 431 }; 432 433 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 434 435 #undef __field_ext 436 #define __field_ext(_type, _item, _filter_type) { \ 437 .type = #_type, .name = #_item, \ 438 .size = sizeof(_type), .align = __alignof__(_type), \ 439 .is_signed = is_signed_type(_type), .filter_type = _filter_type }, 440 441 #undef __field_struct_ext 442 #define __field_struct_ext(_type, _item, _filter_type) { \ 443 .type = #_type, .name = #_item, \ 444 .size = sizeof(_type), .align = __alignof__(_type), \ 445 0, .filter_type = _filter_type }, 446 447 #undef __field 448 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 449 450 #undef __field_struct 451 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 452 453 #undef __array 454 #define __array(_type, _item, _len) { \ 455 .type = #_type"["__stringify(_len)"]", .name = #_item, \ 456 .size = sizeof(_type[_len]), .align = __alignof__(_type), \ 457 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 458 459 #undef __dynamic_array 460 #define __dynamic_array(_type, _item, _len) { \ 461 .type = "__data_loc " #_type "[]", .name = #_item, \ 462 .size = 4, .align = 4, \ 463 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 464 465 #undef __string 466 #define __string(item, src) __dynamic_array(char, item, -1) 467 468 #undef __string_len 469 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 470 471 #undef __bitmask 472 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 473 474 #undef DECLARE_EVENT_CLASS 475 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 476 static struct trace_event_fields trace_event_fields_##call[] = { \ 477 tstruct \ 478 {} }; 479 480 #undef DEFINE_EVENT_PRINT 481 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 482 483 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 484 485 /* 486 * remember the offset of each array from the beginning of the event. 487 */ 488 489 #undef __entry 490 #define __entry entry 491 492 #undef __field 493 #define __field(type, item) 494 495 #undef __field_ext 496 #define __field_ext(type, item, filter_type) 497 498 #undef __field_struct 499 #define __field_struct(type, item) 500 501 #undef __field_struct_ext 502 #define __field_struct_ext(type, item, filter_type) 503 504 #undef __array 505 #define __array(type, item, len) 506 507 #undef __dynamic_array 508 #define __dynamic_array(type, item, len) \ 509 __item_length = (len) * sizeof(type); \ 510 __data_offsets->item = __data_size + \ 511 offsetof(typeof(*entry), __data); \ 512 __data_offsets->item |= __item_length << 16; \ 513 __data_size += __item_length; 514 515 #undef __string 516 #define __string(item, src) __dynamic_array(char, item, \ 517 strlen((src) ? (const char *)(src) : "(null)") + 1) 518 519 #undef __string_len 520 #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1) 521 522 /* 523 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 524 * num_possible_cpus(). 525 */ 526 #define __bitmask_size_in_bytes_raw(nr_bits) \ 527 (((nr_bits) + 7) / 8) 528 529 #define __bitmask_size_in_longs(nr_bits) \ 530 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 531 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 532 533 /* 534 * __bitmask_size_in_bytes is the number of bytes needed to hold 535 * num_possible_cpus() padded out to the nearest long. This is what 536 * is saved in the buffer, just to be consistent. 537 */ 538 #define __bitmask_size_in_bytes(nr_bits) \ 539 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 540 541 #undef __bitmask 542 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 543 __bitmask_size_in_longs(nr_bits)) 544 545 #undef DECLARE_EVENT_CLASS 546 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 547 static inline notrace int trace_event_get_offsets_##call( \ 548 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 549 { \ 550 int __data_size = 0; \ 551 int __maybe_unused __item_length; \ 552 struct trace_event_raw_##call __maybe_unused *entry; \ 553 \ 554 tstruct; \ 555 \ 556 return __data_size; \ 557 } 558 559 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 560 561 /* 562 * Stage 4 of the trace events. 563 * 564 * Override the macros in the event tracepoint header <trace/events/XXX.h> 565 * to include the following: 566 * 567 * For those macros defined with TRACE_EVENT: 568 * 569 * static struct trace_event_call event_<call>; 570 * 571 * static void trace_event_raw_event_<call>(void *__data, proto) 572 * { 573 * struct trace_event_file *trace_file = __data; 574 * struct trace_event_call *event_call = trace_file->event_call; 575 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 576 * unsigned long eflags = trace_file->flags; 577 * enum event_trigger_type __tt = ETT_NONE; 578 * struct ring_buffer_event *event; 579 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 580 * struct trace_buffer *buffer; 581 * unsigned long irq_flags; 582 * int __data_size; 583 * int pc; 584 * 585 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 586 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 587 * event_triggers_call(trace_file, NULL); 588 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 589 * return; 590 * } 591 * 592 * local_save_flags(irq_flags); 593 * pc = preempt_count(); 594 * 595 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 596 * 597 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 598 * event_<call>->event.type, 599 * sizeof(*entry) + __data_size, 600 * irq_flags, pc); 601 * if (!event) 602 * return; 603 * entry = ring_buffer_event_data(event); 604 * 605 * { <assign>; } <-- Here we assign the entries by the __field and 606 * __array macros. 607 * 608 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 609 * __tt = event_triggers_call(trace_file, entry); 610 * 611 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 612 * &trace_file->flags)) 613 * ring_buffer_discard_commit(buffer, event); 614 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 615 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 616 * 617 * if (__tt) 618 * event_triggers_post_call(trace_file, __tt); 619 * } 620 * 621 * static struct trace_event ftrace_event_type_<call> = { 622 * .trace = trace_raw_output_<call>, <-- stage 2 623 * }; 624 * 625 * static char print_fmt_<call>[] = <TP_printk>; 626 * 627 * static struct trace_event_class __used event_class_<template> = { 628 * .system = "<system>", 629 * .fields_array = trace_event_fields_<call>, 630 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 631 * .raw_init = trace_event_raw_init, 632 * .probe = trace_event_raw_event_##call, 633 * .reg = trace_event_reg, 634 * }; 635 * 636 * static struct trace_event_call event_<call> = { 637 * .class = event_class_<template>, 638 * { 639 * .tp = &__tracepoint_<call>, 640 * }, 641 * .event = &ftrace_event_type_<call>, 642 * .print_fmt = print_fmt_<call>, 643 * .flags = TRACE_EVENT_FL_TRACEPOINT, 644 * }; 645 * // its only safe to use pointers when doing linker tricks to 646 * // create an array. 647 * static struct trace_event_call __used 648 * __section("_ftrace_events") *__event_<call> = &event_<call>; 649 * 650 */ 651 652 #ifdef CONFIG_PERF_EVENTS 653 654 #define _TRACE_PERF_PROTO(call, proto) \ 655 static notrace void \ 656 perf_trace_##call(void *__data, proto); 657 658 #define _TRACE_PERF_INIT(call) \ 659 .perf_probe = perf_trace_##call, 660 661 #else 662 #define _TRACE_PERF_PROTO(call, proto) 663 #define _TRACE_PERF_INIT(call) 664 #endif /* CONFIG_PERF_EVENTS */ 665 666 #undef __entry 667 #define __entry entry 668 669 #undef __field 670 #define __field(type, item) 671 672 #undef __field_struct 673 #define __field_struct(type, item) 674 675 #undef __array 676 #define __array(type, item, len) 677 678 #undef __dynamic_array 679 #define __dynamic_array(type, item, len) \ 680 __entry->__data_loc_##item = __data_offsets.item; 681 682 #undef __string 683 #define __string(item, src) __dynamic_array(char, item, -1) 684 685 #undef __string_len 686 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 687 688 #undef __assign_str 689 #define __assign_str(dst, src) \ 690 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 691 692 #undef __assign_str_len 693 #define __assign_str_len(dst, src, len) \ 694 do { \ 695 memcpy(__get_str(dst), (src), (len)); \ 696 __get_str(dst)[len] = '\0'; \ 697 } while(0) 698 699 #undef __bitmask 700 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 701 702 #undef __get_bitmask 703 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 704 705 #undef __assign_bitmask 706 #define __assign_bitmask(dst, src, nr_bits) \ 707 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 708 709 #undef TP_fast_assign 710 #define TP_fast_assign(args...) args 711 712 #undef __perf_count 713 #define __perf_count(c) (c) 714 715 #undef __perf_task 716 #define __perf_task(t) (t) 717 718 #undef DECLARE_EVENT_CLASS 719 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 720 \ 721 static notrace void \ 722 trace_event_raw_event_##call(void *__data, proto) \ 723 { \ 724 struct trace_event_file *trace_file = __data; \ 725 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 726 struct trace_event_buffer fbuffer; \ 727 struct trace_event_raw_##call *entry; \ 728 int __data_size; \ 729 \ 730 if (trace_trigger_soft_disabled(trace_file)) \ 731 return; \ 732 \ 733 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 734 \ 735 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 736 sizeof(*entry) + __data_size); \ 737 \ 738 if (!entry) \ 739 return; \ 740 \ 741 tstruct \ 742 \ 743 { assign; } \ 744 \ 745 trace_event_buffer_commit(&fbuffer); \ 746 } 747 /* 748 * The ftrace_test_probe is compiled out, it is only here as a build time check 749 * to make sure that if the tracepoint handling changes, the ftrace probe will 750 * fail to compile unless it too is updated. 751 */ 752 753 #undef DEFINE_EVENT 754 #define DEFINE_EVENT(template, call, proto, args) \ 755 static inline void ftrace_test_probe_##call(void) \ 756 { \ 757 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 758 } 759 760 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 761 762 #undef __entry 763 #define __entry REC 764 765 #undef __print_flags 766 #undef __print_symbolic 767 #undef __print_hex 768 #undef __print_hex_str 769 #undef __get_dynamic_array 770 #undef __get_dynamic_array_len 771 #undef __get_str 772 #undef __get_bitmask 773 #undef __print_array 774 #undef __print_hex_dump 775 776 /* 777 * The below is not executed in the kernel. It is only what is 778 * displayed in the print format for userspace to parse. 779 */ 780 #undef __print_ns_to_secs 781 #define __print_ns_to_secs(val) (val) / 1000000000UL 782 783 #undef __print_ns_without_secs 784 #define __print_ns_without_secs(val) (val) % 1000000000UL 785 786 #undef TP_printk 787 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 788 789 #undef DECLARE_EVENT_CLASS 790 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 791 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 792 static char print_fmt_##call[] = print; \ 793 static struct trace_event_class __used __refdata event_class_##call = { \ 794 .system = TRACE_SYSTEM_STRING, \ 795 .fields_array = trace_event_fields_##call, \ 796 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 797 .raw_init = trace_event_raw_init, \ 798 .probe = trace_event_raw_event_##call, \ 799 .reg = trace_event_reg, \ 800 _TRACE_PERF_INIT(call) \ 801 }; 802 803 #undef DEFINE_EVENT 804 #define DEFINE_EVENT(template, call, proto, args) \ 805 \ 806 static struct trace_event_call __used event_##call = { \ 807 .class = &event_class_##template, \ 808 { \ 809 .tp = &__tracepoint_##call, \ 810 }, \ 811 .event.funcs = &trace_event_type_funcs_##template, \ 812 .print_fmt = print_fmt_##template, \ 813 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 814 }; \ 815 static struct trace_event_call __used \ 816 __section("_ftrace_events") *__event_##call = &event_##call 817 818 #undef DEFINE_EVENT_PRINT 819 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 820 \ 821 static char print_fmt_##call[] = print; \ 822 \ 823 static struct trace_event_call __used event_##call = { \ 824 .class = &event_class_##template, \ 825 { \ 826 .tp = &__tracepoint_##call, \ 827 }, \ 828 .event.funcs = &trace_event_type_funcs_##call, \ 829 .print_fmt = print_fmt_##call, \ 830 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 831 }; \ 832 static struct trace_event_call __used \ 833 __section("_ftrace_events") *__event_##call = &event_##call 834 835 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 836