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