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 __sockaddr 112 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 113 114 #undef __rel_dynamic_array 115 #define __rel_dynamic_array(type, item, len) u32 __rel_loc_##item; 116 117 #undef __rel_string 118 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 119 120 #undef __rel_string_len 121 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 122 123 #undef __rel_bitmask 124 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(char, item, -1) 125 126 #undef __rel_sockaddr 127 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 128 129 #undef TP_STRUCT__entry 130 #define TP_STRUCT__entry(args...) args 131 132 #undef DECLARE_EVENT_CLASS 133 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 134 struct trace_event_raw_##name { \ 135 struct trace_entry ent; \ 136 tstruct \ 137 char __data[]; \ 138 }; \ 139 \ 140 static struct trace_event_class event_class_##name; 141 142 #undef DEFINE_EVENT 143 #define DEFINE_EVENT(template, name, proto, args) \ 144 static struct trace_event_call __used \ 145 __attribute__((__aligned__(4))) event_##name 146 147 #undef DEFINE_EVENT_FN 148 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 149 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 150 151 #undef DEFINE_EVENT_PRINT 152 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 153 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 154 155 /* Callbacks are meaningless to ftrace. */ 156 #undef TRACE_EVENT_FN 157 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 158 assign, print, reg, unreg) \ 159 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 160 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 161 162 #undef TRACE_EVENT_FN_COND 163 #define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ 164 assign, print, reg, unreg) \ 165 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 166 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 167 168 #undef TRACE_EVENT_FLAGS 169 #define TRACE_EVENT_FLAGS(name, value) \ 170 __TRACE_EVENT_FLAGS(name, value) 171 172 #undef TRACE_EVENT_PERF_PERM 173 #define TRACE_EVENT_PERF_PERM(name, expr...) \ 174 __TRACE_EVENT_PERF_PERM(name, expr) 175 176 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 177 178 /* 179 * Stage 2 of the trace events. 180 * 181 * Include the following: 182 * 183 * struct trace_event_data_offsets_<call> { 184 * u32 <item1>; 185 * u32 <item2>; 186 * [...] 187 * }; 188 * 189 * The __dynamic_array() macro will create each u32 <item>, this is 190 * to keep the offset of each array from the beginning of the event. 191 * The size of an array is also encoded, in the higher 16 bits of <item>. 192 */ 193 194 #undef TRACE_DEFINE_ENUM 195 #define TRACE_DEFINE_ENUM(a) 196 197 #undef TRACE_DEFINE_SIZEOF 198 #define TRACE_DEFINE_SIZEOF(a) 199 200 #undef __field 201 #define __field(type, item) 202 203 #undef __field_ext 204 #define __field_ext(type, item, filter_type) 205 206 #undef __field_struct 207 #define __field_struct(type, item) 208 209 #undef __field_struct_ext 210 #define __field_struct_ext(type, item, filter_type) 211 212 #undef __array 213 #define __array(type, item, len) 214 215 #undef __dynamic_array 216 #define __dynamic_array(type, item, len) u32 item; 217 218 #undef __string 219 #define __string(item, src) __dynamic_array(char, item, -1) 220 221 #undef __string_len 222 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 223 224 #undef __bitmask 225 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 226 227 #undef __sockaddr 228 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 229 230 #undef __rel_dynamic_array 231 #define __rel_dynamic_array(type, item, len) u32 item; 232 233 #undef __rel_string 234 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 235 236 #undef __rel_string_len 237 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 238 239 #undef __rel_bitmask 240 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 241 242 #undef __rel_sockaddr 243 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 244 245 #undef DECLARE_EVENT_CLASS 246 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 247 struct trace_event_data_offsets_##call { \ 248 tstruct; \ 249 }; 250 251 #undef DEFINE_EVENT 252 #define DEFINE_EVENT(template, name, proto, args) 253 254 #undef DEFINE_EVENT_PRINT 255 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 256 257 #undef TRACE_EVENT_FLAGS 258 #define TRACE_EVENT_FLAGS(event, flag) 259 260 #undef TRACE_EVENT_PERF_PERM 261 #define TRACE_EVENT_PERF_PERM(event, expr...) 262 263 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 264 265 /* 266 * Stage 3 of the trace events. 267 * 268 * Override the macros in the event tracepoint header <trace/events/XXX.h> 269 * to include the following: 270 * 271 * enum print_line_t 272 * trace_raw_output_<call>(struct trace_iterator *iter, int flags) 273 * { 274 * struct trace_seq *s = &iter->seq; 275 * struct trace_event_raw_<call> *field; <-- defined in stage 1 276 * struct trace_seq *p = &iter->tmp_seq; 277 * 278 * -------(for event)------- 279 * 280 * struct trace_entry *entry; 281 * 282 * entry = iter->ent; 283 * 284 * if (entry->type != event_<call>->event.type) { 285 * WARN_ON_ONCE(1); 286 * return TRACE_TYPE_UNHANDLED; 287 * } 288 * 289 * field = (typeof(field))entry; 290 * 291 * trace_seq_init(p); 292 * return trace_output_call(iter, <call>, <TP_printk> "\n"); 293 * 294 * ------(or, for event class)------ 295 * 296 * int ret; 297 * 298 * field = (typeof(field))iter->ent; 299 * 300 * ret = trace_raw_output_prep(iter, trace_event); 301 * if (ret != TRACE_TYPE_HANDLED) 302 * return ret; 303 * 304 * trace_event_printf(iter, <TP_printk> "\n"); 305 * 306 * return trace_handle_return(s); 307 * ------- 308 * } 309 * 310 * This is the method used to print the raw event to the trace 311 * output format. Note, this is not needed if the data is read 312 * in binary. 313 */ 314 315 #undef __entry 316 #define __entry field 317 318 #undef TP_printk 319 #define TP_printk(fmt, args...) fmt "\n", args 320 321 #undef __get_dynamic_array 322 #define __get_dynamic_array(field) \ 323 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 324 325 #undef __get_dynamic_array_len 326 #define __get_dynamic_array_len(field) \ 327 ((__entry->__data_loc_##field >> 16) & 0xffff) 328 329 #undef __get_str 330 #define __get_str(field) ((char *)__get_dynamic_array(field)) 331 332 #undef __get_rel_dynamic_array 333 #define __get_rel_dynamic_array(field) \ 334 ((void *)__entry + \ 335 offsetof(typeof(*__entry), __rel_loc_##field) + \ 336 sizeof(__entry->__rel_loc_##field) + \ 337 (__entry->__rel_loc_##field & 0xffff)) 338 339 #undef __get_rel_dynamic_array_len 340 #define __get_rel_dynamic_array_len(field) \ 341 ((__entry->__rel_loc_##field >> 16) & 0xffff) 342 343 #undef __get_rel_str 344 #define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field)) 345 346 #undef __get_bitmask 347 #define __get_bitmask(field) \ 348 ({ \ 349 void *__bitmask = __get_dynamic_array(field); \ 350 unsigned int __bitmask_size; \ 351 __bitmask_size = __get_dynamic_array_len(field); \ 352 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 353 }) 354 355 #undef __get_rel_bitmask 356 #define __get_rel_bitmask(field) \ 357 ({ \ 358 void *__bitmask = __get_rel_dynamic_array(field); \ 359 unsigned int __bitmask_size; \ 360 __bitmask_size = __get_rel_dynamic_array_len(field); \ 361 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ 362 }) 363 364 #undef __get_sockaddr 365 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field)) 366 367 #undef __get_rel_sockaddr 368 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field)) 369 370 #undef __print_flags 371 #define __print_flags(flag, delim, flag_array...) \ 372 ({ \ 373 static const struct trace_print_flags __flags[] = \ 374 { flag_array, { -1, NULL }}; \ 375 trace_print_flags_seq(p, delim, flag, __flags); \ 376 }) 377 378 #undef __print_symbolic 379 #define __print_symbolic(value, symbol_array...) \ 380 ({ \ 381 static const struct trace_print_flags symbols[] = \ 382 { symbol_array, { -1, NULL }}; \ 383 trace_print_symbols_seq(p, value, symbols); \ 384 }) 385 386 #undef __print_flags_u64 387 #undef __print_symbolic_u64 388 #if BITS_PER_LONG == 32 389 #define __print_flags_u64(flag, delim, flag_array...) \ 390 ({ \ 391 static const struct trace_print_flags_u64 __flags[] = \ 392 { flag_array, { -1, NULL } }; \ 393 trace_print_flags_seq_u64(p, delim, flag, __flags); \ 394 }) 395 396 #define __print_symbolic_u64(value, symbol_array...) \ 397 ({ \ 398 static const struct trace_print_flags_u64 symbols[] = \ 399 { symbol_array, { -1, NULL } }; \ 400 trace_print_symbols_seq_u64(p, value, symbols); \ 401 }) 402 #else 403 #define __print_flags_u64(flag, delim, flag_array...) \ 404 __print_flags(flag, delim, flag_array) 405 406 #define __print_symbolic_u64(value, symbol_array...) \ 407 __print_symbolic(value, symbol_array) 408 #endif 409 410 #undef __print_hex 411 #define __print_hex(buf, buf_len) \ 412 trace_print_hex_seq(p, buf, buf_len, false) 413 414 #undef __print_hex_str 415 #define __print_hex_str(buf, buf_len) \ 416 trace_print_hex_seq(p, buf, buf_len, true) 417 418 #undef __print_array 419 #define __print_array(array, count, el_size) \ 420 ({ \ 421 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ 422 el_size != 4 && el_size != 8); \ 423 trace_print_array_seq(p, array, count, el_size); \ 424 }) 425 426 #undef __print_hex_dump 427 #define __print_hex_dump(prefix_str, prefix_type, \ 428 rowsize, groupsize, buf, len, ascii) \ 429 trace_print_hex_dump_seq(p, prefix_str, prefix_type, \ 430 rowsize, groupsize, buf, len, ascii) 431 432 #undef __print_ns_to_secs 433 #define __print_ns_to_secs(value) \ 434 ({ \ 435 u64 ____val = (u64)(value); \ 436 do_div(____val, NSEC_PER_SEC); \ 437 ____val; \ 438 }) 439 440 #undef __print_ns_without_secs 441 #define __print_ns_without_secs(value) \ 442 ({ \ 443 u64 ____val = (u64)(value); \ 444 (u32) do_div(____val, NSEC_PER_SEC); \ 445 }) 446 447 #undef DECLARE_EVENT_CLASS 448 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 449 static notrace enum print_line_t \ 450 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 451 struct trace_event *trace_event) \ 452 { \ 453 struct trace_seq *s = &iter->seq; \ 454 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 455 struct trace_event_raw_##call *field; \ 456 int ret; \ 457 \ 458 field = (typeof(field))iter->ent; \ 459 \ 460 ret = trace_raw_output_prep(iter, trace_event); \ 461 if (ret != TRACE_TYPE_HANDLED) \ 462 return ret; \ 463 \ 464 trace_event_printf(iter, print); \ 465 \ 466 return trace_handle_return(s); \ 467 } \ 468 static struct trace_event_functions trace_event_type_funcs_##call = { \ 469 .trace = trace_raw_output_##call, \ 470 }; 471 472 #undef DEFINE_EVENT_PRINT 473 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 474 static notrace enum print_line_t \ 475 trace_raw_output_##call(struct trace_iterator *iter, int flags, \ 476 struct trace_event *event) \ 477 { \ 478 struct trace_event_raw_##template *field; \ 479 struct trace_entry *entry; \ 480 struct trace_seq *p = &iter->tmp_seq; \ 481 \ 482 entry = iter->ent; \ 483 \ 484 if (entry->type != event_##call.event.type) { \ 485 WARN_ON_ONCE(1); \ 486 return TRACE_TYPE_UNHANDLED; \ 487 } \ 488 \ 489 field = (typeof(field))entry; \ 490 \ 491 trace_seq_init(p); \ 492 return trace_output_call(iter, #call, print); \ 493 } \ 494 static struct trace_event_functions trace_event_type_funcs_##call = { \ 495 .trace = trace_raw_output_##call, \ 496 }; 497 498 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 499 500 #undef __field_ext 501 #define __field_ext(_type, _item, _filter_type) { \ 502 .type = #_type, .name = #_item, \ 503 .size = sizeof(_type), .align = __alignof__(_type), \ 504 .is_signed = is_signed_type(_type), .filter_type = _filter_type }, 505 506 #undef __field_struct_ext 507 #define __field_struct_ext(_type, _item, _filter_type) { \ 508 .type = #_type, .name = #_item, \ 509 .size = sizeof(_type), .align = __alignof__(_type), \ 510 0, .filter_type = _filter_type }, 511 512 #undef __field 513 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 514 515 #undef __field_struct 516 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) 517 518 #undef __array 519 #define __array(_type, _item, _len) { \ 520 .type = #_type"["__stringify(_len)"]", .name = #_item, \ 521 .size = sizeof(_type[_len]), .align = __alignof__(_type), \ 522 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 523 524 #undef __dynamic_array 525 #define __dynamic_array(_type, _item, _len) { \ 526 .type = "__data_loc " #_type "[]", .name = #_item, \ 527 .size = 4, .align = 4, \ 528 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 529 530 #undef __string 531 #define __string(item, src) __dynamic_array(char, item, -1) 532 533 #undef __string_len 534 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 535 536 #undef __bitmask 537 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 538 539 #undef __sockaddr 540 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 541 542 #undef __rel_dynamic_array 543 #define __rel_dynamic_array(_type, _item, _len) { \ 544 .type = "__rel_loc " #_type "[]", .name = #_item, \ 545 .size = 4, .align = 4, \ 546 .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, 547 548 #undef __rel_string 549 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 550 551 #undef __rel_string_len 552 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 553 554 #undef __rel_bitmask 555 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 556 557 #undef __rel_sockaddr 558 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 559 560 #undef DECLARE_EVENT_CLASS 561 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 562 static struct trace_event_fields trace_event_fields_##call[] = { \ 563 tstruct \ 564 {} }; 565 566 #undef DEFINE_EVENT_PRINT 567 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 568 569 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 570 571 /* 572 * remember the offset of each array from the beginning of the event. 573 */ 574 575 #undef __entry 576 #define __entry entry 577 578 #undef __field 579 #define __field(type, item) 580 581 #undef __field_ext 582 #define __field_ext(type, item, filter_type) 583 584 #undef __field_struct 585 #define __field_struct(type, item) 586 587 #undef __field_struct_ext 588 #define __field_struct_ext(type, item, filter_type) 589 590 #undef __array 591 #define __array(type, item, len) 592 593 #undef __dynamic_array 594 #define __dynamic_array(type, item, len) \ 595 __item_length = (len) * sizeof(type); \ 596 __data_offsets->item = __data_size + \ 597 offsetof(typeof(*entry), __data); \ 598 __data_offsets->item |= __item_length << 16; \ 599 __data_size += __item_length; 600 601 #undef __string 602 #define __string(item, src) __dynamic_array(char, item, \ 603 strlen((src) ? (const char *)(src) : "(null)") + 1) 604 605 #undef __string_len 606 #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1) 607 608 #undef __rel_dynamic_array 609 #define __rel_dynamic_array(type, item, len) \ 610 __item_length = (len) * sizeof(type); \ 611 __data_offsets->item = __data_size + \ 612 offsetof(typeof(*entry), __data) - \ 613 offsetof(typeof(*entry), __rel_loc_##item) - \ 614 sizeof(u32); \ 615 __data_offsets->item |= __item_length << 16; \ 616 __data_size += __item_length; 617 618 #undef __rel_string 619 #define __rel_string(item, src) __rel_dynamic_array(char, item, \ 620 strlen((src) ? (const char *)(src) : "(null)") + 1) 621 622 #undef __rel_string_len 623 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1) 624 /* 625 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold 626 * num_possible_cpus(). 627 */ 628 #define __bitmask_size_in_bytes_raw(nr_bits) \ 629 (((nr_bits) + 7) / 8) 630 631 #define __bitmask_size_in_longs(nr_bits) \ 632 ((__bitmask_size_in_bytes_raw(nr_bits) + \ 633 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) 634 635 /* 636 * __bitmask_size_in_bytes is the number of bytes needed to hold 637 * num_possible_cpus() padded out to the nearest long. This is what 638 * is saved in the buffer, just to be consistent. 639 */ 640 #define __bitmask_size_in_bytes(nr_bits) \ 641 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) 642 643 #undef __bitmask 644 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ 645 __bitmask_size_in_longs(nr_bits)) 646 647 #undef __rel_bitmask 648 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \ 649 __bitmask_size_in_longs(nr_bits)) 650 651 #undef __sockaddr 652 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 653 654 #undef __rel_sockaddr 655 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 656 657 #undef DECLARE_EVENT_CLASS 658 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 659 static inline notrace int trace_event_get_offsets_##call( \ 660 struct trace_event_data_offsets_##call *__data_offsets, proto) \ 661 { \ 662 int __data_size = 0; \ 663 int __maybe_unused __item_length; \ 664 struct trace_event_raw_##call __maybe_unused *entry; \ 665 \ 666 tstruct; \ 667 \ 668 return __data_size; \ 669 } 670 671 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 672 673 /* 674 * Stage 4 of the trace events. 675 * 676 * Override the macros in the event tracepoint header <trace/events/XXX.h> 677 * to include the following: 678 * 679 * For those macros defined with TRACE_EVENT: 680 * 681 * static struct trace_event_call event_<call>; 682 * 683 * static void trace_event_raw_event_<call>(void *__data, proto) 684 * { 685 * struct trace_event_file *trace_file = __data; 686 * struct trace_event_call *event_call = trace_file->event_call; 687 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets; 688 * unsigned long eflags = trace_file->flags; 689 * enum event_trigger_type __tt = ETT_NONE; 690 * struct ring_buffer_event *event; 691 * struct trace_event_raw_<call> *entry; <-- defined in stage 1 692 * struct trace_buffer *buffer; 693 * unsigned long irq_flags; 694 * int __data_size; 695 * int pc; 696 * 697 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 698 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 699 * event_triggers_call(trace_file, NULL); 700 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 701 * return; 702 * } 703 * 704 * local_save_flags(irq_flags); 705 * pc = preempt_count(); 706 * 707 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args); 708 * 709 * event = trace_event_buffer_lock_reserve(&buffer, trace_file, 710 * event_<call>->event.type, 711 * sizeof(*entry) + __data_size, 712 * irq_flags, pc); 713 * if (!event) 714 * return; 715 * entry = ring_buffer_event_data(event); 716 * 717 * { <assign>; } <-- Here we assign the entries by the __field and 718 * __array macros. 719 * 720 * if (eflags & EVENT_FILE_FL_TRIGGER_COND) 721 * __tt = event_triggers_call(trace_file, entry); 722 * 723 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, 724 * &trace_file->flags)) 725 * ring_buffer_discard_commit(buffer, event); 726 * else if (!filter_check_discard(trace_file, entry, buffer, event)) 727 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 728 * 729 * if (__tt) 730 * event_triggers_post_call(trace_file, __tt); 731 * } 732 * 733 * static struct trace_event ftrace_event_type_<call> = { 734 * .trace = trace_raw_output_<call>, <-- stage 2 735 * }; 736 * 737 * static char print_fmt_<call>[] = <TP_printk>; 738 * 739 * static struct trace_event_class __used event_class_<template> = { 740 * .system = "<system>", 741 * .fields_array = trace_event_fields_<call>, 742 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 743 * .raw_init = trace_event_raw_init, 744 * .probe = trace_event_raw_event_##call, 745 * .reg = trace_event_reg, 746 * }; 747 * 748 * static struct trace_event_call event_<call> = { 749 * .class = event_class_<template>, 750 * { 751 * .tp = &__tracepoint_<call>, 752 * }, 753 * .event = &ftrace_event_type_<call>, 754 * .print_fmt = print_fmt_<call>, 755 * .flags = TRACE_EVENT_FL_TRACEPOINT, 756 * }; 757 * // its only safe to use pointers when doing linker tricks to 758 * // create an array. 759 * static struct trace_event_call __used 760 * __section("_ftrace_events") *__event_<call> = &event_<call>; 761 * 762 */ 763 764 #ifdef CONFIG_PERF_EVENTS 765 766 #define _TRACE_PERF_PROTO(call, proto) \ 767 static notrace void \ 768 perf_trace_##call(void *__data, proto); 769 770 #define _TRACE_PERF_INIT(call) \ 771 .perf_probe = perf_trace_##call, 772 773 #else 774 #define _TRACE_PERF_PROTO(call, proto) 775 #define _TRACE_PERF_INIT(call) 776 #endif /* CONFIG_PERF_EVENTS */ 777 778 #undef __entry 779 #define __entry entry 780 781 #undef __field 782 #define __field(type, item) 783 784 #undef __field_struct 785 #define __field_struct(type, item) 786 787 #undef __array 788 #define __array(type, item, len) 789 790 #undef __dynamic_array 791 #define __dynamic_array(type, item, len) \ 792 __entry->__data_loc_##item = __data_offsets.item; 793 794 #undef __string 795 #define __string(item, src) __dynamic_array(char, item, -1) 796 797 #undef __string_len 798 #define __string_len(item, src, len) __dynamic_array(char, item, -1) 799 800 #undef __assign_str 801 #define __assign_str(dst, src) \ 802 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)"); 803 804 #undef __assign_str_len 805 #define __assign_str_len(dst, src, len) \ 806 do { \ 807 memcpy(__get_str(dst), (src), (len)); \ 808 __get_str(dst)[len] = '\0'; \ 809 } while(0) 810 811 #undef __bitmask 812 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) 813 814 #undef __get_bitmask 815 #define __get_bitmask(field) (char *)__get_dynamic_array(field) 816 817 #undef __assign_bitmask 818 #define __assign_bitmask(dst, src, nr_bits) \ 819 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 820 821 #undef __sockaddr 822 #define __sockaddr(field, len) __dynamic_array(u8, field, len) 823 824 #undef __get_sockaddr 825 #define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field)) 826 827 #define __assign_sockaddr(dest, src, len) \ 828 memcpy(__get_dynamic_array(dest), src, len) 829 830 #undef __rel_dynamic_array 831 #define __rel_dynamic_array(type, item, len) \ 832 __entry->__rel_loc_##item = __data_offsets.item; 833 834 #undef __rel_string 835 #define __rel_string(item, src) __rel_dynamic_array(char, item, -1) 836 837 #undef __rel_string_len 838 #define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) 839 840 #undef __assign_rel_str 841 #define __assign_rel_str(dst, src) \ 842 strcpy(__get_rel_str(dst), (src) ? (const char *)(src) : "(null)"); 843 844 #undef __assign_rel_str_len 845 #define __assign_rel_str_len(dst, src, len) \ 846 do { \ 847 memcpy(__get_rel_str(dst), (src), (len)); \ 848 __get_rel_str(dst)[len] = '\0'; \ 849 } while (0) 850 851 #undef __rel_bitmask 852 #define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) 853 854 #undef __get_rel_bitmask 855 #define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field) 856 857 #undef __assign_rel_bitmask 858 #define __assign_rel_bitmask(dst, src, nr_bits) \ 859 memcpy(__get_rel_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) 860 861 #undef __rel_sockaddr 862 #define __rel_sockaddr(field, len) __rel_dynamic_array(u8, field, len) 863 864 #undef __get_rel_sockaddr 865 #define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field)) 866 867 #define __assign_rel_sockaddr(dest, src, len) \ 868 memcpy(__get_rel_dynamic_array(dest), src, len) 869 870 871 #undef TP_fast_assign 872 #define TP_fast_assign(args...) args 873 874 #undef __perf_count 875 #define __perf_count(c) (c) 876 877 #undef __perf_task 878 #define __perf_task(t) (t) 879 880 #undef DECLARE_EVENT_CLASS 881 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 882 \ 883 static notrace void \ 884 trace_event_raw_event_##call(void *__data, proto) \ 885 { \ 886 struct trace_event_file *trace_file = __data; \ 887 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ 888 struct trace_event_buffer fbuffer; \ 889 struct trace_event_raw_##call *entry; \ 890 int __data_size; \ 891 \ 892 if (trace_trigger_soft_disabled(trace_file)) \ 893 return; \ 894 \ 895 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ 896 \ 897 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ 898 sizeof(*entry) + __data_size); \ 899 \ 900 if (!entry) \ 901 return; \ 902 \ 903 tstruct \ 904 \ 905 { assign; } \ 906 \ 907 trace_event_buffer_commit(&fbuffer); \ 908 } 909 /* 910 * The ftrace_test_probe is compiled out, it is only here as a build time check 911 * to make sure that if the tracepoint handling changes, the ftrace probe will 912 * fail to compile unless it too is updated. 913 */ 914 915 #undef DEFINE_EVENT 916 #define DEFINE_EVENT(template, call, proto, args) \ 917 static inline void ftrace_test_probe_##call(void) \ 918 { \ 919 check_trace_callback_type_##call(trace_event_raw_event_##template); \ 920 } 921 922 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 923 924 #undef __entry 925 #define __entry REC 926 927 #undef __print_flags 928 #undef __print_symbolic 929 #undef __print_hex 930 #undef __print_hex_str 931 #undef __get_dynamic_array 932 #undef __get_dynamic_array_len 933 #undef __get_str 934 #undef __get_bitmask 935 #undef __get_sockaddr 936 #undef __get_rel_dynamic_array 937 #undef __get_rel_dynamic_array_len 938 #undef __get_rel_str 939 #undef __get_rel_bitmask 940 #undef __get_rel_sockaddr 941 #undef __print_array 942 #undef __print_hex_dump 943 944 /* 945 * The below is not executed in the kernel. It is only what is 946 * displayed in the print format for userspace to parse. 947 */ 948 #undef __print_ns_to_secs 949 #define __print_ns_to_secs(val) (val) / 1000000000UL 950 951 #undef __print_ns_without_secs 952 #define __print_ns_without_secs(val) (val) % 1000000000UL 953 954 #undef TP_printk 955 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 956 957 #undef DECLARE_EVENT_CLASS 958 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 959 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 960 static char print_fmt_##call[] = print; \ 961 static struct trace_event_class __used __refdata event_class_##call = { \ 962 .system = TRACE_SYSTEM_STRING, \ 963 .fields_array = trace_event_fields_##call, \ 964 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 965 .raw_init = trace_event_raw_init, \ 966 .probe = trace_event_raw_event_##call, \ 967 .reg = trace_event_reg, \ 968 _TRACE_PERF_INIT(call) \ 969 }; 970 971 #undef DEFINE_EVENT 972 #define DEFINE_EVENT(template, call, proto, args) \ 973 \ 974 static struct trace_event_call __used event_##call = { \ 975 .class = &event_class_##template, \ 976 { \ 977 .tp = &__tracepoint_##call, \ 978 }, \ 979 .event.funcs = &trace_event_type_funcs_##template, \ 980 .print_fmt = print_fmt_##template, \ 981 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 982 }; \ 983 static struct trace_event_call __used \ 984 __section("_ftrace_events") *__event_##call = &event_##call 985 986 #undef DEFINE_EVENT_PRINT 987 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 988 \ 989 static char print_fmt_##call[] = print; \ 990 \ 991 static struct trace_event_call __used event_##call = { \ 992 .class = &event_class_##template, \ 993 { \ 994 .tp = &__tracepoint_##call, \ 995 }, \ 996 .event.funcs = &trace_event_type_funcs_##call, \ 997 .print_fmt = print_fmt_##call, \ 998 .flags = TRACE_EVENT_FL_TRACEPOINT, \ 999 }; \ 1000 static struct trace_event_call __used \ 1001 __section("_ftrace_events") *__event_##call = &event_##call 1002 1003 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 1004