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