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 DECLARE_EVENT_CLASS 362 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 363 static notrace enum print_line_t \ 364 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 365 struct trace_event *trace_event) \ 366 { \ 367 struct trace_seq *s = &iter->seq; \ 368 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 369 struct trace_event_raw_##call *field; \ 370 int ret; \ 371 \ 372 field = (typeof(field))iter->ent; \ 373 \ 374 ret = trace_raw_output_prep(iter, trace_event); \ 375 if (ret != TRACE_TYPE_HANDLED) \ 376 return ret; \ 377 \ 378 trace_event_printf(iter, print); \ 379 \ 380 return trace_handle_return(s); \ 381 } \ 382 static struct trace_event_functions trace_event_type_funcs_##call = { \ 383 .trace = trace_raw_output_##call, \ 384 }; 385 386 #undef DEFINE_EVENT_PRINT 387 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 388 static notrace enum print_line_t \ 389 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 390 struct trace_event *event) \ 391 { \ 392 struct trace_event_raw_##template *field; \ 393 struct trace_entry *entry; \ 394 struct trace_seq *p = &iter->tmp_seq; \ 395 \ 396 entry = iter->ent; \ 397 \ 398 if (entry->type != event_##call.event.type) { \ 399 WARN_ON_ONCE(1); \ 400 return TRACE_TYPE_UNHANDLED; \ 401 } \ 402 \ 403 field = (typeof(field))entry; \ 404 \ 405 trace_seq_init(p); \ 406 return trace_output_call(iter, #call, print); \ 407 } \ 408 static struct trace_event_functions trace_event_type_funcs_##call = { \ 409 .trace = trace_raw_output_##call, \ 410 }; 411 412 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 413 414 #undef __field_ext 415 #define __field_ext(_type, _item, _filter_type) { \ 416 .type = #_type, .name = #_item, \ 417 .size = sizeof(_type), .align = __alignof__(_type), \ 418 .is_signed = is_signed_type(_type), .filter_type = _filter_type }, 419 420 #undef __field_struct_ext 421 #define __field_struct_ext(_type, _item, _filter_type) { \ 422 .type = #_type, .name = #_item, \ 423 .size = sizeof(_type), .align = __alignof__(_type), \ 424 0, .filter_type = _filter_type }, 425 426 #undef __field 427 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 428 429 #undef __field_struct 430 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 431 432 #undef __array 433 #define __array(_type, _item, _len) { \ 434 .type = #_type"["__stringify(_len)"]", .name = #_item, \ 435 .size = sizeof(_type[_len]), .align = __alignof__(_type), \ 436 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 437 438 #undef __dynamic_array 439 #define __dynamic_array(_type, _item, _len) { \ 440 .type = "__data_loc " #_type "[]", .name = #_item, \ 441 .size = 4, .align = 4, \ 442 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 443 444 #undef __string 445 #define __string(item, src) __dynamic_array(char, item, -1) 446 447 #undef __bitmask 448 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 449 450 #undef DECLARE_EVENT_CLASS 451 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 452 static struct trace_event_fields trace_event_fields_##call[] = { \ 453 tstruct \ 454 {} }; 455 456 #undef DEFINE_EVENT_PRINT 457 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 458 459 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 460 461 /* 462 * remember the offset of each array from the beginning of the event. 463 */ 464 465 #undef __entry 466 #define __entry entry 467 468 #undef __field 469 #define __field(type, item) 470 471 #undef __field_ext 472 #define __field_ext(type, item, filter_type) 473 474 #undef __field_struct 475 #define __field_struct(type, item) 476 477 #undef __field_struct_ext 478 #define __field_struct_ext(type, item, filter_type) 479 480 #undef __array 481 #define __array(type, item, len) 482 483 #undef __dynamic_array 484 #define __dynamic_array(type, item, len) \ 485 __item_length = (len) * sizeof(type); \ 486 __data_offsets->item = __data_size + \ 487 offsetof(typeof(*entry), __data); \ 488 __data_offsets->item |= __item_length << 16; \ 489 __data_size += __item_length; 490 491 #undef __string 492 #define __string(item, src) __dynamic_array(char, item, \ 493 strlen((src) ? (const char *)(src) : "(null)") + 1) 494 495 /* 496 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 497 * num_possible_cpus(). 498 */ 499 #define __bitmask_size_in_bytes_raw(nr_bits) \ 500 (((nr_bits) + 7) / 8) 501 502 #define __bitmask_size_in_longs(nr_bits) \ 503 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 504 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 505 506 /* 507 * __bitmask_size_in_bytes is the number of bytes needed to hold 508 * num_possible_cpus() padded out to the nearest long. This is what 509 * is saved in the buffer, just to be consistent. 510 */ 511 #define __bitmask_size_in_bytes(nr_bits) \ 512 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 513 514 #undef __bitmask 515 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 516 __bitmask_size_in_longs(nr_bits)) 517 518 #undef DECLARE_EVENT_CLASS 519 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 520 static inline notrace int trace_event_get_offsets_##call( \ 521 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 522 { \ 523 int __data_size = 0; \ 524 int __maybe_unused __item_length; \ 525 struct trace_event_raw_##call __maybe_unused *entry; \ 526 \ 527 tstruct; \ 528 \ 529 return __data_size; \ 530 } 531 532 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 533 534 /* 535 * Stage 4 of the trace events. 536 * 537 * Override the macros in the event tracepoint header <trace/events/XXX.h> 538 * to include the following: 539 * 540 * For those macros defined with TRACE_EVENT: 541 * 542 * static struct trace_event_call event_<call>; 543 * 544 * static void trace_event_raw_event_<call>(void *__data, proto) 545 * { 546 * struct trace_event_file *trace_file = __data; 547 * struct trace_event_call *event_call = trace_file->event_call; 548 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 549 * unsigned long eflags = trace_file->flags; 550 * enum event_trigger_type __tt = ETT_NONE; 551 * struct ring_buffer_event *event; 552 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 553 * struct trace_buffer *buffer; 554 * unsigned long irq_flags; 555 * int __data_size; 556 * int pc; 557 * 558 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 559 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 560 * event_triggers_call(trace_file, NULL); 561 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 562 * return; 563 * } 564 * 565 * local_save_flags(irq_flags); 566 * pc = preempt_count(); 567 * 568 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 569 * 570 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 571 * event_<call>->event.type, 572 * sizeof(*entry) + __data_size, 573 * irq_flags, pc); 574 * if (!event) 575 * return; 576 * entry = ring_buffer_event_data(event); 577 * 578 * { <assign>; } <-- Here we assign the entries by the __field and 579 * __array macros. 580 * 581 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 582 * __tt = event_triggers_call(trace_file, entry); 583 * 584 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 585 * &trace_file->flags)) 586 * ring_buffer_discard_commit(buffer, event); 587 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 588 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 589 * 590 * if (__tt) 591 * event_triggers_post_call(trace_file, __tt); 592 * } 593 * 594 * static struct trace_event ftrace_event_type_<call> = { 595 * .trace = trace_raw_output_<call>, <-- stage 2 596 * }; 597 * 598 * static char print_fmt_<call>[] = <TP_printk>; 599 * 600 * static struct trace_event_class __used event_class_<template> = { 601 * .system = "<system>", 602 * .fields_array = trace_event_fields_<call>, 603 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 604 * .raw_init = trace_event_raw_init, 605 * .probe = trace_event_raw_event_##call, 606 * .reg = trace_event_reg, 607 * }; 608 * 609 * static struct trace_event_call event_<call> = { 610 * .class = event_class_<template>, 611 * { 612 * .tp = &__tracepoint_<call>, 613 * }, 614 * .event = &ftrace_event_type_<call>, 615 * .print_fmt = print_fmt_<call>, 616 * .flags = TRACE_EVENT_FL_TRACEPOINT, 617 * }; 618 * // its only safe to use pointers when doing linker tricks to 619 * // create an array. 620 * static struct trace_event_call __used 621 * __section("_ftrace_events") *__event_<call> = &event_<call>; 622 * 623 */ 624 625 #ifdef CONFIG_PERF_EVENTS 626 627 #define _TRACE_PERF_PROTO(call, proto) \ 628 static notrace void \ 629 perf_trace_##call(void *__data, proto); 630 631 #define _TRACE_PERF_INIT(call) \ 632 .perf_probe = perf_trace_##call, 633 634 #else 635 #define _TRACE_PERF_PROTO(call, proto) 636 #define _TRACE_PERF_INIT(call) 637 #endif /* CONFIG_PERF_EVENTS */ 638 639 #undef __entry 640 #define __entry entry 641 642 #undef __field 643 #define __field(type, item) 644 645 #undef __field_struct 646 #define __field_struct(type, item) 647 648 #undef __array 649 #define __array(type, item, len) 650 651 #undef __dynamic_array 652 #define __dynamic_array(type, item, len) \ 653 __entry->__data_loc_##item = __data_offsets.item; 654 655 #undef __string 656 #define __string(item, src) __dynamic_array(char, item, -1) 657 658 #undef __assign_str 659 #define __assign_str(dst, src) \ 660 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 661 662 #undef __bitmask 663 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 664 665 #undef __get_bitmask 666 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 667 668 #undef __assign_bitmask 669 #define __assign_bitmask(dst, src, nr_bits) \ 670 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 671 672 #undef TP_fast_assign 673 #define TP_fast_assign(args...) args 674 675 #undef __perf_count 676 #define __perf_count(c) (c) 677 678 #undef __perf_task 679 #define __perf_task(t) (t) 680 681 #undef DECLARE_EVENT_CLASS 682 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 683 \ 684 static notrace void \ 685 trace_event_raw_event_##call(void *__data, proto) \ 686 { \ 687 struct trace_event_file *trace_file = __data; \ 688 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 689 struct trace_event_buffer fbuffer; \ 690 struct trace_event_raw_##call *entry; \ 691 int __data_size; \ 692 \ 693 if (trace_trigger_soft_disabled(trace_file)) \ 694 return; \ 695 \ 696 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 697 \ 698 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 699 sizeof(*entry) + __data_size); \ 700 \ 701 if (!entry) \ 702 return; \ 703 \ 704 tstruct \ 705 \ 706 { assign; } \ 707 \ 708 trace_event_buffer_commit(&fbuffer); \ 709 } 710 /* 711 * The ftrace_test_probe is compiled out, it is only here as a build time check 712 * to make sure that if the tracepoint handling changes, the ftrace probe will 713 * fail to compile unless it too is updated. 714 */ 715 716 #undef DEFINE_EVENT 717 #define DEFINE_EVENT(template, call, proto, args) \ 718 static inline void ftrace_test_probe_##call(void) \ 719 { \ 720 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 721 } 722 723 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 724 725 #undef __entry 726 #define __entry REC 727 728 #undef __print_flags 729 #undef __print_symbolic 730 #undef __print_hex 731 #undef __print_hex_str 732 #undef __get_dynamic_array 733 #undef __get_dynamic_array_len 734 #undef __get_str 735 #undef __get_bitmask 736 #undef __print_array 737 #undef __print_hex_dump 738 739 #undef TP_printk 740 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 741 742 #undef DECLARE_EVENT_CLASS 743 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 744 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 745 static char print_fmt_##call[] = print; \ 746 static struct trace_event_class __used __refdata event_class_##call = { \ 747 .system = TRACE_SYSTEM_STRING, \ 748 .fields_array = trace_event_fields_##call, \ 749 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 750 .raw_init = trace_event_raw_init, \ 751 .probe = trace_event_raw_event_##call, \ 752 .reg = trace_event_reg, \ 753 _TRACE_PERF_INIT(call) \ 754 }; 755 756 #undef DEFINE_EVENT 757 #define DEFINE_EVENT(template, call, proto, args) \ 758 \ 759 static struct trace_event_call __used event_##call = { \ 760 .class = &event_class_##template, \ 761 { \ 762 .tp = &__tracepoint_##call, \ 763 }, \ 764 .event.funcs = &trace_event_type_funcs_##template, \ 765 .print_fmt = print_fmt_##template, \ 766 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 767 }; \ 768 static struct trace_event_call __used \ 769 __section("_ftrace_events") *__event_##call = &event_##call 770 771 #undef DEFINE_EVENT_PRINT 772 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 773 \ 774 static char print_fmt_##call[] = print; \ 775 \ 776 static struct trace_event_call __used event_##call = { \ 777 .class = &event_class_##template, \ 778 { \ 779 .tp = &__tracepoint_##call, \ 780 }, \ 781 .event.funcs = &trace_event_type_funcs_##call, \ 782 .print_fmt = print_fmt_##call, \ 783 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 784 }; \ 785 static struct trace_event_call __used \ 786 __section("_ftrace_events") *__event_##call = &event_##call 787 788 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 789