1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * trace_output.c 4 * 5 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> 6 * 7 */ 8 #include <linux/module.h> 9 #include <linux/mutex.h> 10 #include <linux/ftrace.h> 11 #include <linux/kprobes.h> 12 #include <linux/sched/clock.h> 13 #include <linux/sched/mm.h> 14 #include <linux/idr.h> 15 16 #include "trace_output.h" 17 18 /* must be a power of 2 */ 19 #define EVENT_HASHSIZE 128 20 21 DECLARE_RWSEM(trace_event_sem); 22 23 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; 24 25 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) 26 { 27 struct trace_seq *s = &iter->seq; 28 struct trace_entry *entry = iter->ent; 29 struct bputs_entry *field; 30 31 trace_assign_type(field, entry); 32 33 trace_seq_puts(s, field->str); 34 35 return trace_handle_return(s); 36 } 37 38 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) 39 { 40 struct trace_seq *s = &iter->seq; 41 struct trace_entry *entry = iter->ent; 42 struct bprint_entry *field; 43 44 trace_assign_type(field, entry); 45 46 trace_seq_bprintf(s, field->fmt, field->buf); 47 48 return trace_handle_return(s); 49 } 50 51 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) 52 { 53 struct trace_seq *s = &iter->seq; 54 struct trace_entry *entry = iter->ent; 55 struct print_entry *field; 56 57 trace_assign_type(field, entry); 58 59 trace_seq_puts(s, field->buf); 60 61 return trace_handle_return(s); 62 } 63 64 const char * 65 trace_print_flags_seq(struct trace_seq *p, const char *delim, 66 unsigned long flags, 67 const struct trace_print_flags *flag_array) 68 { 69 unsigned long mask; 70 const char *str; 71 const char *ret = trace_seq_buffer_ptr(p); 72 int i, first = 1; 73 74 for (i = 0; flag_array[i].name && flags; i++) { 75 76 mask = flag_array[i].mask; 77 if ((flags & mask) != mask) 78 continue; 79 80 str = flag_array[i].name; 81 flags &= ~mask; 82 if (!first && delim) 83 trace_seq_puts(p, delim); 84 else 85 first = 0; 86 trace_seq_puts(p, str); 87 } 88 89 /* check for left over flags */ 90 if (flags) { 91 if (!first && delim) 92 trace_seq_puts(p, delim); 93 trace_seq_printf(p, "0x%lx", flags); 94 } 95 96 trace_seq_putc(p, 0); 97 98 return ret; 99 } 100 EXPORT_SYMBOL(trace_print_flags_seq); 101 102 const char * 103 trace_print_symbols_seq(struct trace_seq *p, unsigned long val, 104 const struct trace_print_flags *symbol_array) 105 { 106 int i; 107 const char *ret = trace_seq_buffer_ptr(p); 108 109 for (i = 0; symbol_array[i].name; i++) { 110 111 if (val != symbol_array[i].mask) 112 continue; 113 114 trace_seq_puts(p, symbol_array[i].name); 115 break; 116 } 117 118 if (ret == (const char *)(trace_seq_buffer_ptr(p))) 119 trace_seq_printf(p, "0x%lx", val); 120 121 trace_seq_putc(p, 0); 122 123 return ret; 124 } 125 EXPORT_SYMBOL(trace_print_symbols_seq); 126 127 #if BITS_PER_LONG == 32 128 const char * 129 trace_print_flags_seq_u64(struct trace_seq *p, const char *delim, 130 unsigned long long flags, 131 const struct trace_print_flags_u64 *flag_array) 132 { 133 unsigned long long mask; 134 const char *str; 135 const char *ret = trace_seq_buffer_ptr(p); 136 int i, first = 1; 137 138 for (i = 0; flag_array[i].name && flags; i++) { 139 140 mask = flag_array[i].mask; 141 if ((flags & mask) != mask) 142 continue; 143 144 str = flag_array[i].name; 145 flags &= ~mask; 146 if (!first && delim) 147 trace_seq_puts(p, delim); 148 else 149 first = 0; 150 trace_seq_puts(p, str); 151 } 152 153 /* check for left over flags */ 154 if (flags) { 155 if (!first && delim) 156 trace_seq_puts(p, delim); 157 trace_seq_printf(p, "0x%llx", flags); 158 } 159 160 trace_seq_putc(p, 0); 161 162 return ret; 163 } 164 EXPORT_SYMBOL(trace_print_flags_seq_u64); 165 166 const char * 167 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, 168 const struct trace_print_flags_u64 *symbol_array) 169 { 170 int i; 171 const char *ret = trace_seq_buffer_ptr(p); 172 173 for (i = 0; symbol_array[i].name; i++) { 174 175 if (val != symbol_array[i].mask) 176 continue; 177 178 trace_seq_puts(p, symbol_array[i].name); 179 break; 180 } 181 182 if (ret == (const char *)(trace_seq_buffer_ptr(p))) 183 trace_seq_printf(p, "0x%llx", val); 184 185 trace_seq_putc(p, 0); 186 187 return ret; 188 } 189 EXPORT_SYMBOL(trace_print_symbols_seq_u64); 190 #endif 191 192 const char * 193 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, 194 unsigned int bitmask_size) 195 { 196 const char *ret = trace_seq_buffer_ptr(p); 197 198 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); 199 trace_seq_putc(p, 0); 200 201 return ret; 202 } 203 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq); 204 205 /** 206 * trace_print_hex_seq - print buffer as hex sequence 207 * @p: trace seq struct to write to 208 * @buf: The buffer to print 209 * @buf_len: Length of @buf in bytes 210 * @concatenate: Print @buf as single hex string or with spacing 211 * 212 * Prints the passed buffer as a hex sequence either as a whole, 213 * single hex string if @concatenate is true or with spacing after 214 * each byte in case @concatenate is false. 215 */ 216 const char * 217 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len, 218 bool concatenate) 219 { 220 int i; 221 const char *ret = trace_seq_buffer_ptr(p); 222 const char *fmt = concatenate ? "%*phN" : "%*ph"; 223 224 for (i = 0; i < buf_len; i += 16) { 225 if (!concatenate && i != 0) 226 trace_seq_putc(p, ' '); 227 trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]); 228 } 229 trace_seq_putc(p, 0); 230 231 return ret; 232 } 233 EXPORT_SYMBOL(trace_print_hex_seq); 234 235 const char * 236 trace_print_array_seq(struct trace_seq *p, const void *buf, int count, 237 size_t el_size) 238 { 239 const char *ret = trace_seq_buffer_ptr(p); 240 const char *prefix = ""; 241 void *ptr = (void *)buf; 242 size_t buf_len = count * el_size; 243 244 trace_seq_putc(p, '{'); 245 246 while (ptr < buf + buf_len) { 247 switch (el_size) { 248 case 1: 249 trace_seq_printf(p, "%s0x%x", prefix, 250 *(u8 *)ptr); 251 break; 252 case 2: 253 trace_seq_printf(p, "%s0x%x", prefix, 254 *(u16 *)ptr); 255 break; 256 case 4: 257 trace_seq_printf(p, "%s0x%x", prefix, 258 *(u32 *)ptr); 259 break; 260 case 8: 261 trace_seq_printf(p, "%s0x%llx", prefix, 262 *(u64 *)ptr); 263 break; 264 default: 265 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, 266 *(u8 *)ptr); 267 el_size = 1; 268 } 269 prefix = ","; 270 ptr += el_size; 271 } 272 273 trace_seq_putc(p, '}'); 274 trace_seq_putc(p, 0); 275 276 return ret; 277 } 278 EXPORT_SYMBOL(trace_print_array_seq); 279 280 const char * 281 trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str, 282 int prefix_type, int rowsize, int groupsize, 283 const void *buf, size_t len, bool ascii) 284 { 285 const char *ret = trace_seq_buffer_ptr(p); 286 287 trace_seq_putc(p, '\n'); 288 trace_seq_hex_dump(p, prefix_str, prefix_type, 289 rowsize, groupsize, buf, len, ascii); 290 trace_seq_putc(p, 0); 291 return ret; 292 } 293 EXPORT_SYMBOL(trace_print_hex_dump_seq); 294 295 int trace_raw_output_prep(struct trace_iterator *iter, 296 struct trace_event *trace_event) 297 { 298 struct trace_event_call *event; 299 struct trace_seq *s = &iter->seq; 300 struct trace_seq *p = &iter->tmp_seq; 301 struct trace_entry *entry; 302 303 event = container_of(trace_event, struct trace_event_call, event); 304 entry = iter->ent; 305 306 if (entry->type != event->event.type) { 307 WARN_ON_ONCE(1); 308 return TRACE_TYPE_UNHANDLED; 309 } 310 311 trace_seq_init(p); 312 trace_seq_printf(s, "%s: ", trace_event_name(event)); 313 314 return trace_handle_return(s); 315 } 316 EXPORT_SYMBOL(trace_raw_output_prep); 317 318 void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...) 319 { 320 va_list ap; 321 322 va_start(ap, fmt); 323 trace_check_vprintf(iter, trace_event_format(iter, fmt), ap); 324 va_end(ap); 325 } 326 EXPORT_SYMBOL(trace_event_printf); 327 328 static __printf(3, 0) 329 int trace_output_raw(struct trace_iterator *iter, char *name, 330 char *fmt, va_list ap) 331 { 332 struct trace_seq *s = &iter->seq; 333 334 trace_seq_printf(s, "%s: ", name); 335 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap); 336 337 return trace_handle_return(s); 338 } 339 340 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) 341 { 342 va_list ap; 343 int ret; 344 345 va_start(ap, fmt); 346 ret = trace_output_raw(iter, name, fmt, ap); 347 va_end(ap); 348 349 return ret; 350 } 351 EXPORT_SYMBOL_GPL(trace_output_call); 352 353 static inline const char *kretprobed(const char *name, unsigned long addr) 354 { 355 if (is_kretprobe_trampoline(addr)) 356 return "[unknown/kretprobe'd]"; 357 return name; 358 } 359 360 void 361 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset) 362 { 363 #ifdef CONFIG_KALLSYMS 364 char str[KSYM_SYMBOL_LEN]; 365 const char *name; 366 367 if (offset) 368 sprint_symbol(str, address); 369 else 370 kallsyms_lookup(address, NULL, NULL, NULL, str); 371 name = kretprobed(str, address); 372 373 if (name && strlen(name)) { 374 trace_seq_puts(s, name); 375 return; 376 } 377 #endif 378 trace_seq_printf(s, "0x%08lx", address); 379 } 380 381 #ifndef CONFIG_64BIT 382 # define IP_FMT "%08lx" 383 #else 384 # define IP_FMT "%016lx" 385 #endif 386 387 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, 388 unsigned long ip, unsigned long sym_flags) 389 { 390 struct file *file = NULL; 391 unsigned long vmstart = 0; 392 int ret = 1; 393 394 if (s->full) 395 return 0; 396 397 if (mm) { 398 const struct vm_area_struct *vma; 399 400 mmap_read_lock(mm); 401 vma = find_vma(mm, ip); 402 if (vma) { 403 file = vma->vm_file; 404 vmstart = vma->vm_start; 405 } 406 if (file) { 407 ret = trace_seq_path(s, file_user_path(file)); 408 if (ret) 409 trace_seq_printf(s, "[+0x%lx]", 410 ip - vmstart); 411 } 412 mmap_read_unlock(mm); 413 } 414 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) 415 trace_seq_printf(s, " <" IP_FMT ">", ip); 416 return !trace_seq_has_overflowed(s); 417 } 418 419 int 420 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) 421 { 422 if (!ip) { 423 trace_seq_putc(s, '0'); 424 goto out; 425 } 426 427 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET); 428 429 if (sym_flags & TRACE_ITER_SYM_ADDR) 430 trace_seq_printf(s, " <" IP_FMT ">", ip); 431 432 out: 433 return !trace_seq_has_overflowed(s); 434 } 435 436 /** 437 * trace_print_lat_fmt - print the irq, preempt and lockdep fields 438 * @s: trace seq struct to write to 439 * @entry: The trace entry field from the ring buffer 440 * 441 * Prints the generic fields of irqs off, in hard or softirq, preempt 442 * count. 443 */ 444 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) 445 { 446 char hardsoft_irq; 447 char need_resched; 448 char irqs_off; 449 int hardirq; 450 int softirq; 451 int bh_off; 452 int nmi; 453 454 nmi = entry->flags & TRACE_FLAG_NMI; 455 hardirq = entry->flags & TRACE_FLAG_HARDIRQ; 456 softirq = entry->flags & TRACE_FLAG_SOFTIRQ; 457 bh_off = entry->flags & TRACE_FLAG_BH_OFF; 458 459 irqs_off = 460 (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' : 461 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : 462 bh_off ? 'b' : 463 '.'; 464 465 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY | 466 TRACE_FLAG_PREEMPT_RESCHED)) { 467 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY | TRACE_FLAG_PREEMPT_RESCHED: 468 need_resched = 'B'; 469 break; 470 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: 471 need_resched = 'N'; 472 break; 473 case TRACE_FLAG_NEED_RESCHED_LAZY | TRACE_FLAG_PREEMPT_RESCHED: 474 need_resched = 'L'; 475 break; 476 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY: 477 need_resched = 'b'; 478 break; 479 case TRACE_FLAG_NEED_RESCHED: 480 need_resched = 'n'; 481 break; 482 case TRACE_FLAG_PREEMPT_RESCHED: 483 need_resched = 'p'; 484 break; 485 case TRACE_FLAG_NEED_RESCHED_LAZY: 486 need_resched = 'l'; 487 break; 488 default: 489 need_resched = '.'; 490 break; 491 } 492 493 hardsoft_irq = 494 (nmi && hardirq) ? 'Z' : 495 nmi ? 'z' : 496 (hardirq && softirq) ? 'H' : 497 hardirq ? 'h' : 498 softirq ? 's' : 499 '.' ; 500 501 trace_seq_printf(s, "%c%c%c", 502 irqs_off, need_resched, hardsoft_irq); 503 504 if (entry->preempt_count & 0xf) 505 trace_seq_printf(s, "%x", entry->preempt_count & 0xf); 506 else 507 trace_seq_putc(s, '.'); 508 509 if (entry->preempt_count & 0xf0) 510 trace_seq_printf(s, "%x", entry->preempt_count >> 4); 511 else 512 trace_seq_putc(s, '.'); 513 514 return !trace_seq_has_overflowed(s); 515 } 516 517 static int 518 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) 519 { 520 char comm[TASK_COMM_LEN]; 521 522 trace_find_cmdline(entry->pid, comm); 523 524 trace_seq_printf(s, "%8.8s-%-7d %3d", 525 comm, entry->pid, cpu); 526 527 return trace_print_lat_fmt(s, entry); 528 } 529 530 #undef MARK 531 #define MARK(v, s) {.val = v, .sym = s} 532 /* trace overhead mark */ 533 static const struct trace_mark { 534 unsigned long long val; /* unit: nsec */ 535 char sym; 536 } mark[] = { 537 MARK(1000000000ULL , '$'), /* 1 sec */ 538 MARK(100000000ULL , '@'), /* 100 msec */ 539 MARK(10000000ULL , '*'), /* 10 msec */ 540 MARK(1000000ULL , '#'), /* 1000 usecs */ 541 MARK(100000ULL , '!'), /* 100 usecs */ 542 MARK(10000ULL , '+'), /* 10 usecs */ 543 }; 544 #undef MARK 545 546 char trace_find_mark(unsigned long long d) 547 { 548 int i; 549 int size = ARRAY_SIZE(mark); 550 551 for (i = 0; i < size; i++) { 552 if (d > mark[i].val) 553 break; 554 } 555 556 return (i == size) ? ' ' : mark[i].sym; 557 } 558 559 static int 560 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) 561 { 562 struct trace_array *tr = iter->tr; 563 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; 564 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; 565 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start; 566 unsigned long long rel_ts = next_ts - iter->ts; 567 struct trace_seq *s = &iter->seq; 568 569 if (in_ns) { 570 abs_ts = ns2usecs(abs_ts); 571 rel_ts = ns2usecs(rel_ts); 572 } 573 574 if (verbose && in_ns) { 575 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); 576 unsigned long abs_msec = (unsigned long)abs_ts; 577 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); 578 unsigned long rel_msec = (unsigned long)rel_ts; 579 580 trace_seq_printf( 581 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", 582 ns2usecs(iter->ts), 583 abs_msec, abs_usec, 584 rel_msec, rel_usec); 585 586 } else if (verbose && !in_ns) { 587 trace_seq_printf( 588 s, "[%016llx] %lld (+%lld): ", 589 iter->ts, abs_ts, rel_ts); 590 591 } else if (!verbose && in_ns) { 592 trace_seq_printf( 593 s, " %4lldus%c: ", 594 abs_ts, 595 trace_find_mark(rel_ts * NSEC_PER_USEC)); 596 597 } else { /* !verbose && !in_ns */ 598 trace_seq_printf(s, " %4lld: ", abs_ts); 599 } 600 601 return !trace_seq_has_overflowed(s); 602 } 603 604 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter, 605 unsigned long long ts) 606 { 607 unsigned long secs, usec_rem; 608 unsigned long long t; 609 610 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { 611 t = ns2usecs(ts); 612 usec_rem = do_div(t, USEC_PER_SEC); 613 secs = (unsigned long)t; 614 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem); 615 } else 616 trace_seq_printf(s, " %12llu", ts); 617 } 618 619 int trace_print_context(struct trace_iterator *iter) 620 { 621 struct trace_array *tr = iter->tr; 622 struct trace_seq *s = &iter->seq; 623 struct trace_entry *entry = iter->ent; 624 char comm[TASK_COMM_LEN]; 625 626 trace_find_cmdline(entry->pid, comm); 627 628 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid); 629 630 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) { 631 unsigned int tgid = trace_find_tgid(entry->pid); 632 633 if (!tgid) 634 trace_seq_printf(s, "(-------) "); 635 else 636 trace_seq_printf(s, "(%7d) ", tgid); 637 } 638 639 trace_seq_printf(s, "[%03d] ", iter->cpu); 640 641 if (tr->trace_flags & TRACE_ITER_IRQ_INFO) 642 trace_print_lat_fmt(s, entry); 643 644 trace_print_time(s, iter, iter->ts); 645 trace_seq_puts(s, ": "); 646 647 return !trace_seq_has_overflowed(s); 648 } 649 650 int trace_print_lat_context(struct trace_iterator *iter) 651 { 652 struct trace_entry *entry, *next_entry; 653 struct trace_array *tr = iter->tr; 654 struct trace_seq *s = &iter->seq; 655 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); 656 u64 next_ts; 657 658 next_entry = trace_find_next_entry(iter, NULL, &next_ts); 659 if (!next_entry) 660 next_ts = iter->ts; 661 662 /* trace_find_next_entry() may change iter->ent */ 663 entry = iter->ent; 664 665 if (verbose) { 666 char comm[TASK_COMM_LEN]; 667 668 trace_find_cmdline(entry->pid, comm); 669 670 trace_seq_printf( 671 s, "%16s %7d %3d %d %08x %08lx ", 672 comm, entry->pid, iter->cpu, entry->flags, 673 entry->preempt_count & 0xf, iter->idx); 674 } else { 675 lat_print_generic(s, entry, iter->cpu); 676 } 677 678 lat_print_timestamp(iter, next_ts); 679 680 return !trace_seq_has_overflowed(s); 681 } 682 683 /** 684 * ftrace_find_event - find a registered event 685 * @type: the type of event to look for 686 * 687 * Returns an event of type @type otherwise NULL 688 * Called with trace_event_read_lock() held. 689 */ 690 struct trace_event *ftrace_find_event(int type) 691 { 692 struct trace_event *event; 693 unsigned key; 694 695 key = type & (EVENT_HASHSIZE - 1); 696 697 hlist_for_each_entry(event, &event_hash[key], node) { 698 if (event->type == type) 699 return event; 700 } 701 702 return NULL; 703 } 704 705 static DEFINE_IDA(trace_event_ida); 706 707 static void free_trace_event_type(int type) 708 { 709 if (type >= __TRACE_LAST_TYPE) 710 ida_free(&trace_event_ida, type); 711 } 712 713 static int alloc_trace_event_type(void) 714 { 715 int next; 716 717 /* Skip static defined type numbers */ 718 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE, 719 TRACE_EVENT_TYPE_MAX, GFP_KERNEL); 720 if (next < 0) 721 return 0; 722 return next; 723 } 724 725 void trace_event_read_lock(void) 726 { 727 down_read(&trace_event_sem); 728 } 729 730 void trace_event_read_unlock(void) 731 { 732 up_read(&trace_event_sem); 733 } 734 735 /** 736 * register_trace_event - register output for an event type 737 * @event: the event type to register 738 * 739 * Event types are stored in a hash and this hash is used to 740 * find a way to print an event. If the @event->type is set 741 * then it will use that type, otherwise it will assign a 742 * type to use. 743 * 744 * If you assign your own type, please make sure it is added 745 * to the trace_type enum in trace.h, to avoid collisions 746 * with the dynamic types. 747 * 748 * Returns the event type number or zero on error. 749 */ 750 int register_trace_event(struct trace_event *event) 751 { 752 unsigned key; 753 int ret = 0; 754 755 down_write(&trace_event_sem); 756 757 if (WARN_ON(!event)) 758 goto out; 759 760 if (WARN_ON(!event->funcs)) 761 goto out; 762 763 if (!event->type) { 764 event->type = alloc_trace_event_type(); 765 if (!event->type) 766 goto out; 767 } else if (WARN(event->type > __TRACE_LAST_TYPE, 768 "Need to add type to trace.h")) { 769 goto out; 770 } else { 771 /* Is this event already used */ 772 if (ftrace_find_event(event->type)) 773 goto out; 774 } 775 776 if (event->funcs->trace == NULL) 777 event->funcs->trace = trace_nop_print; 778 if (event->funcs->raw == NULL) 779 event->funcs->raw = trace_nop_print; 780 if (event->funcs->hex == NULL) 781 event->funcs->hex = trace_nop_print; 782 if (event->funcs->binary == NULL) 783 event->funcs->binary = trace_nop_print; 784 785 key = event->type & (EVENT_HASHSIZE - 1); 786 787 hlist_add_head(&event->node, &event_hash[key]); 788 789 ret = event->type; 790 out: 791 up_write(&trace_event_sem); 792 793 return ret; 794 } 795 EXPORT_SYMBOL_GPL(register_trace_event); 796 797 /* 798 * Used by module code with the trace_event_sem held for write. 799 */ 800 int __unregister_trace_event(struct trace_event *event) 801 { 802 hlist_del(&event->node); 803 free_trace_event_type(event->type); 804 return 0; 805 } 806 807 /** 808 * unregister_trace_event - remove a no longer used event 809 * @event: the event to remove 810 */ 811 int unregister_trace_event(struct trace_event *event) 812 { 813 down_write(&trace_event_sem); 814 __unregister_trace_event(event); 815 up_write(&trace_event_sem); 816 817 return 0; 818 } 819 EXPORT_SYMBOL_GPL(unregister_trace_event); 820 821 /* 822 * Standard events 823 */ 824 825 static void print_array(struct trace_iterator *iter, void *pos, 826 struct ftrace_event_field *field) 827 { 828 int offset; 829 int len; 830 int i; 831 832 offset = *(int *)pos & 0xffff; 833 len = *(int *)pos >> 16; 834 835 if (field) 836 offset += field->offset + sizeof(int); 837 838 if (offset + len > iter->ent_size) { 839 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 840 return; 841 } 842 843 pos = (void *)iter->ent + offset; 844 845 for (i = 0; i < len; i++, pos++) { 846 if (i) 847 trace_seq_putc(&iter->seq, ','); 848 trace_seq_printf(&iter->seq, "%02x", *(unsigned char *)pos); 849 } 850 } 851 852 static void print_fields(struct trace_iterator *iter, struct trace_event_call *call, 853 struct list_head *head) 854 { 855 struct ftrace_event_field *field; 856 int offset; 857 int len; 858 int ret; 859 void *pos; 860 861 list_for_each_entry_reverse(field, head, link) { 862 trace_seq_printf(&iter->seq, " %s=", field->name); 863 if (field->offset + field->size > iter->ent_size) { 864 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 865 continue; 866 } 867 pos = (void *)iter->ent + field->offset; 868 869 switch (field->filter_type) { 870 case FILTER_COMM: 871 case FILTER_STATIC_STRING: 872 trace_seq_printf(&iter->seq, "%.*s", field->size, (char *)pos); 873 break; 874 case FILTER_RDYN_STRING: 875 case FILTER_DYN_STRING: 876 offset = *(int *)pos & 0xffff; 877 len = *(int *)pos >> 16; 878 879 if (field->filter_type == FILTER_RDYN_STRING) 880 offset += field->offset + sizeof(int); 881 882 if (offset + len > iter->ent_size) { 883 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 884 break; 885 } 886 pos = (void *)iter->ent + offset; 887 trace_seq_printf(&iter->seq, "%.*s", len, (char *)pos); 888 break; 889 case FILTER_PTR_STRING: 890 if (!iter->fmt_size) 891 trace_iter_expand_format(iter); 892 pos = *(void **)pos; 893 ret = strncpy_from_kernel_nofault(iter->fmt, pos, 894 iter->fmt_size); 895 if (ret < 0) 896 trace_seq_printf(&iter->seq, "(0x%px)", pos); 897 else 898 trace_seq_printf(&iter->seq, "(0x%px:%s)", 899 pos, iter->fmt); 900 break; 901 case FILTER_TRACE_FN: 902 pos = *(void **)pos; 903 trace_seq_printf(&iter->seq, "%pS", pos); 904 break; 905 case FILTER_CPU: 906 case FILTER_OTHER: 907 switch (field->size) { 908 case 1: 909 if (isprint(*(char *)pos)) { 910 trace_seq_printf(&iter->seq, "'%c'", 911 *(unsigned char *)pos); 912 } 913 trace_seq_printf(&iter->seq, "(%d)", 914 *(unsigned char *)pos); 915 break; 916 case 2: 917 trace_seq_printf(&iter->seq, "0x%x (%d)", 918 *(unsigned short *)pos, 919 *(unsigned short *)pos); 920 break; 921 case 4: 922 /* dynamic array info is 4 bytes */ 923 if (strstr(field->type, "__data_loc")) { 924 print_array(iter, pos, NULL); 925 break; 926 } 927 928 if (strstr(field->type, "__rel_loc")) { 929 print_array(iter, pos, field); 930 break; 931 } 932 933 trace_seq_printf(&iter->seq, "0x%x (%d)", 934 *(unsigned int *)pos, 935 *(unsigned int *)pos); 936 break; 937 case 8: 938 trace_seq_printf(&iter->seq, "0x%llx (%lld)", 939 *(unsigned long long *)pos, 940 *(unsigned long long *)pos); 941 break; 942 default: 943 trace_seq_puts(&iter->seq, "<INVALID-SIZE>"); 944 break; 945 } 946 break; 947 default: 948 trace_seq_puts(&iter->seq, "<INVALID-TYPE>"); 949 } 950 } 951 trace_seq_putc(&iter->seq, '\n'); 952 } 953 954 enum print_line_t print_event_fields(struct trace_iterator *iter, 955 struct trace_event *event) 956 { 957 struct trace_event_call *call; 958 struct list_head *head; 959 960 /* ftrace defined events have separate call structures */ 961 if (event->type <= __TRACE_LAST_TYPE) { 962 bool found = false; 963 964 down_read(&trace_event_sem); 965 list_for_each_entry(call, &ftrace_events, list) { 966 if (call->event.type == event->type) { 967 found = true; 968 break; 969 } 970 /* No need to search all events */ 971 if (call->event.type > __TRACE_LAST_TYPE) 972 break; 973 } 974 up_read(&trace_event_sem); 975 if (!found) { 976 trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type); 977 goto out; 978 } 979 } else { 980 call = container_of(event, struct trace_event_call, event); 981 } 982 head = trace_get_fields(call); 983 984 trace_seq_printf(&iter->seq, "%s:", trace_event_name(call)); 985 986 if (head && !list_empty(head)) 987 print_fields(iter, call, head); 988 else 989 trace_seq_puts(&iter->seq, "No fields found\n"); 990 991 out: 992 return trace_handle_return(&iter->seq); 993 } 994 995 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, 996 struct trace_event *event) 997 { 998 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); 999 1000 return trace_handle_return(&iter->seq); 1001 } 1002 1003 static void print_fn_trace(struct trace_seq *s, unsigned long ip, 1004 unsigned long parent_ip, long delta, int flags) 1005 { 1006 ip += delta; 1007 parent_ip += delta; 1008 1009 seq_print_ip_sym(s, ip, flags); 1010 1011 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) { 1012 trace_seq_puts(s, " <-"); 1013 seq_print_ip_sym(s, parent_ip, flags); 1014 } 1015 } 1016 1017 /* TRACE_FN */ 1018 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, 1019 struct trace_event *event) 1020 { 1021 struct ftrace_entry *field; 1022 struct trace_seq *s = &iter->seq; 1023 1024 trace_assign_type(field, iter->ent); 1025 1026 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags); 1027 trace_seq_putc(s, '\n'); 1028 1029 return trace_handle_return(s); 1030 } 1031 1032 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, 1033 struct trace_event *event) 1034 { 1035 struct ftrace_entry *field; 1036 1037 trace_assign_type(field, iter->ent); 1038 1039 trace_seq_printf(&iter->seq, "%lx %lx\n", 1040 field->ip, 1041 field->parent_ip); 1042 1043 return trace_handle_return(&iter->seq); 1044 } 1045 1046 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, 1047 struct trace_event *event) 1048 { 1049 struct ftrace_entry *field; 1050 struct trace_seq *s = &iter->seq; 1051 1052 trace_assign_type(field, iter->ent); 1053 1054 SEQ_PUT_HEX_FIELD(s, field->ip); 1055 SEQ_PUT_HEX_FIELD(s, field->parent_ip); 1056 1057 return trace_handle_return(s); 1058 } 1059 1060 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, 1061 struct trace_event *event) 1062 { 1063 struct ftrace_entry *field; 1064 struct trace_seq *s = &iter->seq; 1065 1066 trace_assign_type(field, iter->ent); 1067 1068 SEQ_PUT_FIELD(s, field->ip); 1069 SEQ_PUT_FIELD(s, field->parent_ip); 1070 1071 return trace_handle_return(s); 1072 } 1073 1074 static struct trace_event_functions trace_fn_funcs = { 1075 .trace = trace_fn_trace, 1076 .raw = trace_fn_raw, 1077 .hex = trace_fn_hex, 1078 .binary = trace_fn_bin, 1079 }; 1080 1081 static struct trace_event trace_fn_event = { 1082 .type = TRACE_FN, 1083 .funcs = &trace_fn_funcs, 1084 }; 1085 1086 /* TRACE_CTX an TRACE_WAKE */ 1087 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, 1088 char *delim) 1089 { 1090 struct ctx_switch_entry *field; 1091 char comm[TASK_COMM_LEN]; 1092 int S, T; 1093 1094 1095 trace_assign_type(field, iter->ent); 1096 1097 T = task_index_to_char(field->next_state); 1098 S = task_index_to_char(field->prev_state); 1099 trace_find_cmdline(field->next_pid, comm); 1100 trace_seq_printf(&iter->seq, 1101 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n", 1102 field->prev_pid, 1103 field->prev_prio, 1104 S, delim, 1105 field->next_cpu, 1106 field->next_pid, 1107 field->next_prio, 1108 T, comm); 1109 1110 return trace_handle_return(&iter->seq); 1111 } 1112 1113 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, 1114 struct trace_event *event) 1115 { 1116 return trace_ctxwake_print(iter, "==>"); 1117 } 1118 1119 static enum print_line_t trace_wake_print(struct trace_iterator *iter, 1120 int flags, struct trace_event *event) 1121 { 1122 return trace_ctxwake_print(iter, " +"); 1123 } 1124 1125 static int trace_ctxwake_raw(struct trace_iterator *iter, char S) 1126 { 1127 struct ctx_switch_entry *field; 1128 int T; 1129 1130 trace_assign_type(field, iter->ent); 1131 1132 if (!S) 1133 S = task_index_to_char(field->prev_state); 1134 T = task_index_to_char(field->next_state); 1135 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", 1136 field->prev_pid, 1137 field->prev_prio, 1138 S, 1139 field->next_cpu, 1140 field->next_pid, 1141 field->next_prio, 1142 T); 1143 1144 return trace_handle_return(&iter->seq); 1145 } 1146 1147 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, 1148 struct trace_event *event) 1149 { 1150 return trace_ctxwake_raw(iter, 0); 1151 } 1152 1153 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, 1154 struct trace_event *event) 1155 { 1156 return trace_ctxwake_raw(iter, '+'); 1157 } 1158 1159 1160 static int trace_ctxwake_hex(struct trace_iterator *iter, char S) 1161 { 1162 struct ctx_switch_entry *field; 1163 struct trace_seq *s = &iter->seq; 1164 int T; 1165 1166 trace_assign_type(field, iter->ent); 1167 1168 if (!S) 1169 S = task_index_to_char(field->prev_state); 1170 T = task_index_to_char(field->next_state); 1171 1172 SEQ_PUT_HEX_FIELD(s, field->prev_pid); 1173 SEQ_PUT_HEX_FIELD(s, field->prev_prio); 1174 SEQ_PUT_HEX_FIELD(s, S); 1175 SEQ_PUT_HEX_FIELD(s, field->next_cpu); 1176 SEQ_PUT_HEX_FIELD(s, field->next_pid); 1177 SEQ_PUT_HEX_FIELD(s, field->next_prio); 1178 SEQ_PUT_HEX_FIELD(s, T); 1179 1180 return trace_handle_return(s); 1181 } 1182 1183 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, 1184 struct trace_event *event) 1185 { 1186 return trace_ctxwake_hex(iter, 0); 1187 } 1188 1189 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, 1190 struct trace_event *event) 1191 { 1192 return trace_ctxwake_hex(iter, '+'); 1193 } 1194 1195 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, 1196 int flags, struct trace_event *event) 1197 { 1198 struct ctx_switch_entry *field; 1199 struct trace_seq *s = &iter->seq; 1200 1201 trace_assign_type(field, iter->ent); 1202 1203 SEQ_PUT_FIELD(s, field->prev_pid); 1204 SEQ_PUT_FIELD(s, field->prev_prio); 1205 SEQ_PUT_FIELD(s, field->prev_state); 1206 SEQ_PUT_FIELD(s, field->next_cpu); 1207 SEQ_PUT_FIELD(s, field->next_pid); 1208 SEQ_PUT_FIELD(s, field->next_prio); 1209 SEQ_PUT_FIELD(s, field->next_state); 1210 1211 return trace_handle_return(s); 1212 } 1213 1214 static struct trace_event_functions trace_ctx_funcs = { 1215 .trace = trace_ctx_print, 1216 .raw = trace_ctx_raw, 1217 .hex = trace_ctx_hex, 1218 .binary = trace_ctxwake_bin, 1219 }; 1220 1221 static struct trace_event trace_ctx_event = { 1222 .type = TRACE_CTX, 1223 .funcs = &trace_ctx_funcs, 1224 }; 1225 1226 static struct trace_event_functions trace_wake_funcs = { 1227 .trace = trace_wake_print, 1228 .raw = trace_wake_raw, 1229 .hex = trace_wake_hex, 1230 .binary = trace_ctxwake_bin, 1231 }; 1232 1233 static struct trace_event trace_wake_event = { 1234 .type = TRACE_WAKE, 1235 .funcs = &trace_wake_funcs, 1236 }; 1237 1238 /* TRACE_STACK */ 1239 1240 static enum print_line_t trace_stack_print(struct trace_iterator *iter, 1241 int flags, struct trace_event *event) 1242 { 1243 struct stack_entry *field; 1244 struct trace_seq *s = &iter->seq; 1245 unsigned long *p; 1246 unsigned long *end; 1247 long delta = iter->tr->text_delta; 1248 1249 trace_assign_type(field, iter->ent); 1250 end = (unsigned long *)((long)iter->ent + iter->ent_size); 1251 1252 trace_seq_puts(s, "<stack trace>\n"); 1253 1254 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) { 1255 1256 if (trace_seq_has_overflowed(s)) 1257 break; 1258 1259 trace_seq_puts(s, " => "); 1260 if ((*p) == FTRACE_TRAMPOLINE_MARKER) { 1261 trace_seq_puts(s, "[FTRACE TRAMPOLINE]\n"); 1262 continue; 1263 } 1264 seq_print_ip_sym(s, (*p) + delta, flags); 1265 trace_seq_putc(s, '\n'); 1266 } 1267 1268 return trace_handle_return(s); 1269 } 1270 1271 static struct trace_event_functions trace_stack_funcs = { 1272 .trace = trace_stack_print, 1273 }; 1274 1275 static struct trace_event trace_stack_event = { 1276 .type = TRACE_STACK, 1277 .funcs = &trace_stack_funcs, 1278 }; 1279 1280 /* TRACE_USER_STACK */ 1281 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, 1282 int flags, struct trace_event *event) 1283 { 1284 struct trace_array *tr = iter->tr; 1285 struct userstack_entry *field; 1286 struct trace_seq *s = &iter->seq; 1287 struct mm_struct *mm = NULL; 1288 unsigned int i; 1289 1290 trace_assign_type(field, iter->ent); 1291 1292 trace_seq_puts(s, "<user stack trace>\n"); 1293 1294 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { 1295 struct task_struct *task; 1296 /* 1297 * we do the lookup on the thread group leader, 1298 * since individual threads might have already quit! 1299 */ 1300 rcu_read_lock(); 1301 task = find_task_by_vpid(field->tgid); 1302 if (task) 1303 mm = get_task_mm(task); 1304 rcu_read_unlock(); 1305 } 1306 1307 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { 1308 unsigned long ip = field->caller[i]; 1309 1310 if (!ip || trace_seq_has_overflowed(s)) 1311 break; 1312 1313 trace_seq_puts(s, " => "); 1314 seq_print_user_ip(s, mm, ip, flags); 1315 trace_seq_putc(s, '\n'); 1316 } 1317 1318 if (mm) 1319 mmput(mm); 1320 1321 return trace_handle_return(s); 1322 } 1323 1324 static struct trace_event_functions trace_user_stack_funcs = { 1325 .trace = trace_user_stack_print, 1326 }; 1327 1328 static struct trace_event trace_user_stack_event = { 1329 .type = TRACE_USER_STACK, 1330 .funcs = &trace_user_stack_funcs, 1331 }; 1332 1333 /* TRACE_HWLAT */ 1334 static enum print_line_t 1335 trace_hwlat_print(struct trace_iterator *iter, int flags, 1336 struct trace_event *event) 1337 { 1338 struct trace_entry *entry = iter->ent; 1339 struct trace_seq *s = &iter->seq; 1340 struct hwlat_entry *field; 1341 1342 trace_assign_type(field, entry); 1343 1344 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d", 1345 field->seqnum, 1346 field->duration, 1347 field->outer_duration, 1348 (long long)field->timestamp.tv_sec, 1349 field->timestamp.tv_nsec, field->count); 1350 1351 if (field->nmi_count) { 1352 /* 1353 * The generic sched_clock() is not NMI safe, thus 1354 * we only record the count and not the time. 1355 */ 1356 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) 1357 trace_seq_printf(s, " nmi-total:%llu", 1358 field->nmi_total_ts); 1359 trace_seq_printf(s, " nmi-count:%u", 1360 field->nmi_count); 1361 } 1362 1363 trace_seq_putc(s, '\n'); 1364 1365 return trace_handle_return(s); 1366 } 1367 1368 static enum print_line_t 1369 trace_hwlat_raw(struct trace_iterator *iter, int flags, 1370 struct trace_event *event) 1371 { 1372 struct hwlat_entry *field; 1373 struct trace_seq *s = &iter->seq; 1374 1375 trace_assign_type(field, iter->ent); 1376 1377 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", 1378 field->duration, 1379 field->outer_duration, 1380 (long long)field->timestamp.tv_sec, 1381 field->timestamp.tv_nsec, 1382 field->seqnum); 1383 1384 return trace_handle_return(s); 1385 } 1386 1387 static struct trace_event_functions trace_hwlat_funcs = { 1388 .trace = trace_hwlat_print, 1389 .raw = trace_hwlat_raw, 1390 }; 1391 1392 static struct trace_event trace_hwlat_event = { 1393 .type = TRACE_HWLAT, 1394 .funcs = &trace_hwlat_funcs, 1395 }; 1396 1397 /* TRACE_OSNOISE */ 1398 static enum print_line_t 1399 trace_osnoise_print(struct trace_iterator *iter, int flags, 1400 struct trace_event *event) 1401 { 1402 struct trace_entry *entry = iter->ent; 1403 struct trace_seq *s = &iter->seq; 1404 struct osnoise_entry *field; 1405 u64 ratio, ratio_dec; 1406 u64 net_runtime; 1407 1408 trace_assign_type(field, entry); 1409 1410 /* 1411 * compute the available % of cpu time. 1412 */ 1413 net_runtime = field->runtime - field->noise; 1414 ratio = net_runtime * 10000000; 1415 do_div(ratio, field->runtime); 1416 ratio_dec = do_div(ratio, 100000); 1417 1418 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu", 1419 field->runtime, 1420 field->noise, 1421 ratio, ratio_dec, 1422 field->max_sample); 1423 1424 trace_seq_printf(s, " %6u", field->hw_count); 1425 trace_seq_printf(s, " %6u", field->nmi_count); 1426 trace_seq_printf(s, " %6u", field->irq_count); 1427 trace_seq_printf(s, " %6u", field->softirq_count); 1428 trace_seq_printf(s, " %6u", field->thread_count); 1429 1430 trace_seq_putc(s, '\n'); 1431 1432 return trace_handle_return(s); 1433 } 1434 1435 static enum print_line_t 1436 trace_osnoise_raw(struct trace_iterator *iter, int flags, 1437 struct trace_event *event) 1438 { 1439 struct osnoise_entry *field; 1440 struct trace_seq *s = &iter->seq; 1441 1442 trace_assign_type(field, iter->ent); 1443 1444 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n", 1445 field->runtime, 1446 field->noise, 1447 field->max_sample, 1448 field->hw_count, 1449 field->nmi_count, 1450 field->irq_count, 1451 field->softirq_count, 1452 field->thread_count); 1453 1454 return trace_handle_return(s); 1455 } 1456 1457 static struct trace_event_functions trace_osnoise_funcs = { 1458 .trace = trace_osnoise_print, 1459 .raw = trace_osnoise_raw, 1460 }; 1461 1462 static struct trace_event trace_osnoise_event = { 1463 .type = TRACE_OSNOISE, 1464 .funcs = &trace_osnoise_funcs, 1465 }; 1466 1467 /* TRACE_TIMERLAT */ 1468 1469 static char *timerlat_lat_context[] = {"irq", "thread", "user-ret"}; 1470 static enum print_line_t 1471 trace_timerlat_print(struct trace_iterator *iter, int flags, 1472 struct trace_event *event) 1473 { 1474 struct trace_entry *entry = iter->ent; 1475 struct trace_seq *s = &iter->seq; 1476 struct timerlat_entry *field; 1477 1478 trace_assign_type(field, entry); 1479 1480 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n", 1481 field->seqnum, 1482 timerlat_lat_context[field->context], 1483 field->timer_latency); 1484 1485 return trace_handle_return(s); 1486 } 1487 1488 static enum print_line_t 1489 trace_timerlat_raw(struct trace_iterator *iter, int flags, 1490 struct trace_event *event) 1491 { 1492 struct timerlat_entry *field; 1493 struct trace_seq *s = &iter->seq; 1494 1495 trace_assign_type(field, iter->ent); 1496 1497 trace_seq_printf(s, "%u %d %llu\n", 1498 field->seqnum, 1499 field->context, 1500 field->timer_latency); 1501 1502 return trace_handle_return(s); 1503 } 1504 1505 static struct trace_event_functions trace_timerlat_funcs = { 1506 .trace = trace_timerlat_print, 1507 .raw = trace_timerlat_raw, 1508 }; 1509 1510 static struct trace_event trace_timerlat_event = { 1511 .type = TRACE_TIMERLAT, 1512 .funcs = &trace_timerlat_funcs, 1513 }; 1514 1515 /* TRACE_BPUTS */ 1516 static enum print_line_t 1517 trace_bputs_print(struct trace_iterator *iter, int flags, 1518 struct trace_event *event) 1519 { 1520 struct trace_entry *entry = iter->ent; 1521 struct trace_seq *s = &iter->seq; 1522 struct bputs_entry *field; 1523 1524 trace_assign_type(field, entry); 1525 1526 seq_print_ip_sym(s, field->ip, flags); 1527 trace_seq_puts(s, ": "); 1528 trace_seq_puts(s, field->str); 1529 1530 return trace_handle_return(s); 1531 } 1532 1533 1534 static enum print_line_t 1535 trace_bputs_raw(struct trace_iterator *iter, int flags, 1536 struct trace_event *event) 1537 { 1538 struct bputs_entry *field; 1539 struct trace_seq *s = &iter->seq; 1540 1541 trace_assign_type(field, iter->ent); 1542 1543 trace_seq_printf(s, ": %lx : ", field->ip); 1544 trace_seq_puts(s, field->str); 1545 1546 return trace_handle_return(s); 1547 } 1548 1549 static struct trace_event_functions trace_bputs_funcs = { 1550 .trace = trace_bputs_print, 1551 .raw = trace_bputs_raw, 1552 }; 1553 1554 static struct trace_event trace_bputs_event = { 1555 .type = TRACE_BPUTS, 1556 .funcs = &trace_bputs_funcs, 1557 }; 1558 1559 /* TRACE_BPRINT */ 1560 static enum print_line_t 1561 trace_bprint_print(struct trace_iterator *iter, int flags, 1562 struct trace_event *event) 1563 { 1564 struct trace_entry *entry = iter->ent; 1565 struct trace_seq *s = &iter->seq; 1566 struct bprint_entry *field; 1567 1568 trace_assign_type(field, entry); 1569 1570 seq_print_ip_sym(s, field->ip, flags); 1571 trace_seq_puts(s, ": "); 1572 trace_seq_bprintf(s, field->fmt, field->buf); 1573 1574 return trace_handle_return(s); 1575 } 1576 1577 1578 static enum print_line_t 1579 trace_bprint_raw(struct trace_iterator *iter, int flags, 1580 struct trace_event *event) 1581 { 1582 struct bprint_entry *field; 1583 struct trace_seq *s = &iter->seq; 1584 1585 trace_assign_type(field, iter->ent); 1586 1587 trace_seq_printf(s, ": %lx : ", field->ip); 1588 trace_seq_bprintf(s, field->fmt, field->buf); 1589 1590 return trace_handle_return(s); 1591 } 1592 1593 static struct trace_event_functions trace_bprint_funcs = { 1594 .trace = trace_bprint_print, 1595 .raw = trace_bprint_raw, 1596 }; 1597 1598 static struct trace_event trace_bprint_event = { 1599 .type = TRACE_BPRINT, 1600 .funcs = &trace_bprint_funcs, 1601 }; 1602 1603 /* TRACE_PRINT */ 1604 static enum print_line_t trace_print_print(struct trace_iterator *iter, 1605 int flags, struct trace_event *event) 1606 { 1607 struct print_entry *field; 1608 struct trace_seq *s = &iter->seq; 1609 unsigned long ip; 1610 1611 trace_assign_type(field, iter->ent); 1612 1613 ip = field->ip + iter->tr->text_delta; 1614 1615 seq_print_ip_sym(s, ip, flags); 1616 trace_seq_printf(s, ": %s", field->buf); 1617 1618 return trace_handle_return(s); 1619 } 1620 1621 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, 1622 struct trace_event *event) 1623 { 1624 struct print_entry *field; 1625 1626 trace_assign_type(field, iter->ent); 1627 1628 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); 1629 1630 return trace_handle_return(&iter->seq); 1631 } 1632 1633 static struct trace_event_functions trace_print_funcs = { 1634 .trace = trace_print_print, 1635 .raw = trace_print_raw, 1636 }; 1637 1638 static struct trace_event trace_print_event = { 1639 .type = TRACE_PRINT, 1640 .funcs = &trace_print_funcs, 1641 }; 1642 1643 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, 1644 struct trace_event *event) 1645 { 1646 struct raw_data_entry *field; 1647 int i; 1648 1649 trace_assign_type(field, iter->ent); 1650 1651 trace_seq_printf(&iter->seq, "# %x buf:", field->id); 1652 1653 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) 1654 trace_seq_printf(&iter->seq, " %02x", 1655 (unsigned char)field->buf[i]); 1656 1657 trace_seq_putc(&iter->seq, '\n'); 1658 1659 return trace_handle_return(&iter->seq); 1660 } 1661 1662 static struct trace_event_functions trace_raw_data_funcs = { 1663 .trace = trace_raw_data, 1664 .raw = trace_raw_data, 1665 }; 1666 1667 static struct trace_event trace_raw_data_event = { 1668 .type = TRACE_RAW_DATA, 1669 .funcs = &trace_raw_data_funcs, 1670 }; 1671 1672 static enum print_line_t 1673 trace_func_repeats_raw(struct trace_iterator *iter, int flags, 1674 struct trace_event *event) 1675 { 1676 struct func_repeats_entry *field; 1677 struct trace_seq *s = &iter->seq; 1678 1679 trace_assign_type(field, iter->ent); 1680 1681 trace_seq_printf(s, "%lu %lu %u %llu\n", 1682 field->ip, 1683 field->parent_ip, 1684 field->count, 1685 FUNC_REPEATS_GET_DELTA_TS(field)); 1686 1687 return trace_handle_return(s); 1688 } 1689 1690 static enum print_line_t 1691 trace_func_repeats_print(struct trace_iterator *iter, int flags, 1692 struct trace_event *event) 1693 { 1694 struct func_repeats_entry *field; 1695 struct trace_seq *s = &iter->seq; 1696 1697 trace_assign_type(field, iter->ent); 1698 1699 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags); 1700 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count); 1701 trace_print_time(s, iter, 1702 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field)); 1703 trace_seq_puts(s, ")\n"); 1704 1705 return trace_handle_return(s); 1706 } 1707 1708 static struct trace_event_functions trace_func_repeats_funcs = { 1709 .trace = trace_func_repeats_print, 1710 .raw = trace_func_repeats_raw, 1711 }; 1712 1713 static struct trace_event trace_func_repeats_event = { 1714 .type = TRACE_FUNC_REPEATS, 1715 .funcs = &trace_func_repeats_funcs, 1716 }; 1717 1718 static struct trace_event *events[] __initdata = { 1719 &trace_fn_event, 1720 &trace_ctx_event, 1721 &trace_wake_event, 1722 &trace_stack_event, 1723 &trace_user_stack_event, 1724 &trace_bputs_event, 1725 &trace_bprint_event, 1726 &trace_print_event, 1727 &trace_hwlat_event, 1728 &trace_osnoise_event, 1729 &trace_timerlat_event, 1730 &trace_raw_data_event, 1731 &trace_func_repeats_event, 1732 NULL 1733 }; 1734 1735 __init int init_events(void) 1736 { 1737 struct trace_event *event; 1738 int i, ret; 1739 1740 for (i = 0; events[i]; i++) { 1741 event = events[i]; 1742 ret = register_trace_event(event); 1743 WARN_ONCE(!ret, "event %d failed to register", event->type); 1744 } 1745 1746 return 0; 1747 } 1748