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 | 466 TRACE_FLAG_PREEMPT_RESCHED)) { 467 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: 468 need_resched = 'N'; 469 break; 470 case TRACE_FLAG_NEED_RESCHED: 471 need_resched = 'n'; 472 break; 473 case TRACE_FLAG_PREEMPT_RESCHED: 474 need_resched = 'p'; 475 break; 476 default: 477 need_resched = '.'; 478 break; 479 } 480 481 hardsoft_irq = 482 (nmi && hardirq) ? 'Z' : 483 nmi ? 'z' : 484 (hardirq && softirq) ? 'H' : 485 hardirq ? 'h' : 486 softirq ? 's' : 487 '.' ; 488 489 trace_seq_printf(s, "%c%c%c", 490 irqs_off, need_resched, hardsoft_irq); 491 492 if (entry->preempt_count & 0xf) 493 trace_seq_printf(s, "%x", entry->preempt_count & 0xf); 494 else 495 trace_seq_putc(s, '.'); 496 497 if (entry->preempt_count & 0xf0) 498 trace_seq_printf(s, "%x", entry->preempt_count >> 4); 499 else 500 trace_seq_putc(s, '.'); 501 502 return !trace_seq_has_overflowed(s); 503 } 504 505 static int 506 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) 507 { 508 char comm[TASK_COMM_LEN]; 509 510 trace_find_cmdline(entry->pid, comm); 511 512 trace_seq_printf(s, "%8.8s-%-7d %3d", 513 comm, entry->pid, cpu); 514 515 return trace_print_lat_fmt(s, entry); 516 } 517 518 #undef MARK 519 #define MARK(v, s) {.val = v, .sym = s} 520 /* trace overhead mark */ 521 static const struct trace_mark { 522 unsigned long long val; /* unit: nsec */ 523 char sym; 524 } mark[] = { 525 MARK(1000000000ULL , '$'), /* 1 sec */ 526 MARK(100000000ULL , '@'), /* 100 msec */ 527 MARK(10000000ULL , '*'), /* 10 msec */ 528 MARK(1000000ULL , '#'), /* 1000 usecs */ 529 MARK(100000ULL , '!'), /* 100 usecs */ 530 MARK(10000ULL , '+'), /* 10 usecs */ 531 }; 532 #undef MARK 533 534 char trace_find_mark(unsigned long long d) 535 { 536 int i; 537 int size = ARRAY_SIZE(mark); 538 539 for (i = 0; i < size; i++) { 540 if (d > mark[i].val) 541 break; 542 } 543 544 return (i == size) ? ' ' : mark[i].sym; 545 } 546 547 static int 548 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) 549 { 550 struct trace_array *tr = iter->tr; 551 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; 552 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; 553 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start; 554 unsigned long long rel_ts = next_ts - iter->ts; 555 struct trace_seq *s = &iter->seq; 556 557 if (in_ns) { 558 abs_ts = ns2usecs(abs_ts); 559 rel_ts = ns2usecs(rel_ts); 560 } 561 562 if (verbose && in_ns) { 563 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); 564 unsigned long abs_msec = (unsigned long)abs_ts; 565 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); 566 unsigned long rel_msec = (unsigned long)rel_ts; 567 568 trace_seq_printf( 569 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", 570 ns2usecs(iter->ts), 571 abs_msec, abs_usec, 572 rel_msec, rel_usec); 573 574 } else if (verbose && !in_ns) { 575 trace_seq_printf( 576 s, "[%016llx] %lld (+%lld): ", 577 iter->ts, abs_ts, rel_ts); 578 579 } else if (!verbose && in_ns) { 580 trace_seq_printf( 581 s, " %4lldus%c: ", 582 abs_ts, 583 trace_find_mark(rel_ts * NSEC_PER_USEC)); 584 585 } else { /* !verbose && !in_ns */ 586 trace_seq_printf(s, " %4lld: ", abs_ts); 587 } 588 589 return !trace_seq_has_overflowed(s); 590 } 591 592 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter, 593 unsigned long long ts) 594 { 595 unsigned long secs, usec_rem; 596 unsigned long long t; 597 598 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { 599 t = ns2usecs(ts); 600 usec_rem = do_div(t, USEC_PER_SEC); 601 secs = (unsigned long)t; 602 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem); 603 } else 604 trace_seq_printf(s, " %12llu", ts); 605 } 606 607 int trace_print_context(struct trace_iterator *iter) 608 { 609 struct trace_array *tr = iter->tr; 610 struct trace_seq *s = &iter->seq; 611 struct trace_entry *entry = iter->ent; 612 char comm[TASK_COMM_LEN]; 613 614 trace_find_cmdline(entry->pid, comm); 615 616 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid); 617 618 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) { 619 unsigned int tgid = trace_find_tgid(entry->pid); 620 621 if (!tgid) 622 trace_seq_printf(s, "(-------) "); 623 else 624 trace_seq_printf(s, "(%7d) ", tgid); 625 } 626 627 trace_seq_printf(s, "[%03d] ", iter->cpu); 628 629 if (tr->trace_flags & TRACE_ITER_IRQ_INFO) 630 trace_print_lat_fmt(s, entry); 631 632 trace_print_time(s, iter, iter->ts); 633 trace_seq_puts(s, ": "); 634 635 return !trace_seq_has_overflowed(s); 636 } 637 638 int trace_print_lat_context(struct trace_iterator *iter) 639 { 640 struct trace_entry *entry, *next_entry; 641 struct trace_array *tr = iter->tr; 642 struct trace_seq *s = &iter->seq; 643 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); 644 u64 next_ts; 645 646 next_entry = trace_find_next_entry(iter, NULL, &next_ts); 647 if (!next_entry) 648 next_ts = iter->ts; 649 650 /* trace_find_next_entry() may change iter->ent */ 651 entry = iter->ent; 652 653 if (verbose) { 654 char comm[TASK_COMM_LEN]; 655 656 trace_find_cmdline(entry->pid, comm); 657 658 trace_seq_printf( 659 s, "%16s %7d %3d %d %08x %08lx ", 660 comm, entry->pid, iter->cpu, entry->flags, 661 entry->preempt_count & 0xf, iter->idx); 662 } else { 663 lat_print_generic(s, entry, iter->cpu); 664 } 665 666 lat_print_timestamp(iter, next_ts); 667 668 return !trace_seq_has_overflowed(s); 669 } 670 671 /** 672 * ftrace_find_event - find a registered event 673 * @type: the type of event to look for 674 * 675 * Returns an event of type @type otherwise NULL 676 * Called with trace_event_read_lock() held. 677 */ 678 struct trace_event *ftrace_find_event(int type) 679 { 680 struct trace_event *event; 681 unsigned key; 682 683 key = type & (EVENT_HASHSIZE - 1); 684 685 hlist_for_each_entry(event, &event_hash[key], node) { 686 if (event->type == type) 687 return event; 688 } 689 690 return NULL; 691 } 692 693 static DEFINE_IDA(trace_event_ida); 694 695 static void free_trace_event_type(int type) 696 { 697 if (type >= __TRACE_LAST_TYPE) 698 ida_free(&trace_event_ida, type); 699 } 700 701 static int alloc_trace_event_type(void) 702 { 703 int next; 704 705 /* Skip static defined type numbers */ 706 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE, 707 TRACE_EVENT_TYPE_MAX, GFP_KERNEL); 708 if (next < 0) 709 return 0; 710 return next; 711 } 712 713 void trace_event_read_lock(void) 714 { 715 down_read(&trace_event_sem); 716 } 717 718 void trace_event_read_unlock(void) 719 { 720 up_read(&trace_event_sem); 721 } 722 723 /** 724 * register_trace_event - register output for an event type 725 * @event: the event type to register 726 * 727 * Event types are stored in a hash and this hash is used to 728 * find a way to print an event. If the @event->type is set 729 * then it will use that type, otherwise it will assign a 730 * type to use. 731 * 732 * If you assign your own type, please make sure it is added 733 * to the trace_type enum in trace.h, to avoid collisions 734 * with the dynamic types. 735 * 736 * Returns the event type number or zero on error. 737 */ 738 int register_trace_event(struct trace_event *event) 739 { 740 unsigned key; 741 int ret = 0; 742 743 down_write(&trace_event_sem); 744 745 if (WARN_ON(!event)) 746 goto out; 747 748 if (WARN_ON(!event->funcs)) 749 goto out; 750 751 if (!event->type) { 752 event->type = alloc_trace_event_type(); 753 if (!event->type) 754 goto out; 755 } else if (WARN(event->type > __TRACE_LAST_TYPE, 756 "Need to add type to trace.h")) { 757 goto out; 758 } else { 759 /* Is this event already used */ 760 if (ftrace_find_event(event->type)) 761 goto out; 762 } 763 764 if (event->funcs->trace == NULL) 765 event->funcs->trace = trace_nop_print; 766 if (event->funcs->raw == NULL) 767 event->funcs->raw = trace_nop_print; 768 if (event->funcs->hex == NULL) 769 event->funcs->hex = trace_nop_print; 770 if (event->funcs->binary == NULL) 771 event->funcs->binary = trace_nop_print; 772 773 key = event->type & (EVENT_HASHSIZE - 1); 774 775 hlist_add_head(&event->node, &event_hash[key]); 776 777 ret = event->type; 778 out: 779 up_write(&trace_event_sem); 780 781 return ret; 782 } 783 EXPORT_SYMBOL_GPL(register_trace_event); 784 785 /* 786 * Used by module code with the trace_event_sem held for write. 787 */ 788 int __unregister_trace_event(struct trace_event *event) 789 { 790 hlist_del(&event->node); 791 free_trace_event_type(event->type); 792 return 0; 793 } 794 795 /** 796 * unregister_trace_event - remove a no longer used event 797 * @event: the event to remove 798 */ 799 int unregister_trace_event(struct trace_event *event) 800 { 801 down_write(&trace_event_sem); 802 __unregister_trace_event(event); 803 up_write(&trace_event_sem); 804 805 return 0; 806 } 807 EXPORT_SYMBOL_GPL(unregister_trace_event); 808 809 /* 810 * Standard events 811 */ 812 813 static void print_array(struct trace_iterator *iter, void *pos, 814 struct ftrace_event_field *field) 815 { 816 int offset; 817 int len; 818 int i; 819 820 offset = *(int *)pos & 0xffff; 821 len = *(int *)pos >> 16; 822 823 if (field) 824 offset += field->offset + sizeof(int); 825 826 if (offset + len > iter->ent_size) { 827 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 828 return; 829 } 830 831 pos = (void *)iter->ent + offset; 832 833 for (i = 0; i < len; i++, pos++) { 834 if (i) 835 trace_seq_putc(&iter->seq, ','); 836 trace_seq_printf(&iter->seq, "%02x", *(unsigned char *)pos); 837 } 838 } 839 840 static void print_fields(struct trace_iterator *iter, struct trace_event_call *call, 841 struct list_head *head) 842 { 843 struct ftrace_event_field *field; 844 int offset; 845 int len; 846 int ret; 847 void *pos; 848 849 list_for_each_entry_reverse(field, head, link) { 850 trace_seq_printf(&iter->seq, " %s=", field->name); 851 if (field->offset + field->size > iter->ent_size) { 852 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 853 continue; 854 } 855 pos = (void *)iter->ent + field->offset; 856 857 switch (field->filter_type) { 858 case FILTER_COMM: 859 case FILTER_STATIC_STRING: 860 trace_seq_printf(&iter->seq, "%.*s", field->size, (char *)pos); 861 break; 862 case FILTER_RDYN_STRING: 863 case FILTER_DYN_STRING: 864 offset = *(int *)pos & 0xffff; 865 len = *(int *)pos >> 16; 866 867 if (field->filter_type == FILTER_RDYN_STRING) 868 offset += field->offset + sizeof(int); 869 870 if (offset + len > iter->ent_size) { 871 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 872 break; 873 } 874 pos = (void *)iter->ent + offset; 875 trace_seq_printf(&iter->seq, "%.*s", len, (char *)pos); 876 break; 877 case FILTER_PTR_STRING: 878 if (!iter->fmt_size) 879 trace_iter_expand_format(iter); 880 pos = *(void **)pos; 881 ret = strncpy_from_kernel_nofault(iter->fmt, pos, 882 iter->fmt_size); 883 if (ret < 0) 884 trace_seq_printf(&iter->seq, "(0x%px)", pos); 885 else 886 trace_seq_printf(&iter->seq, "(0x%px:%s)", 887 pos, iter->fmt); 888 break; 889 case FILTER_TRACE_FN: 890 pos = *(void **)pos; 891 trace_seq_printf(&iter->seq, "%pS", pos); 892 break; 893 case FILTER_CPU: 894 case FILTER_OTHER: 895 switch (field->size) { 896 case 1: 897 if (isprint(*(char *)pos)) { 898 trace_seq_printf(&iter->seq, "'%c'", 899 *(unsigned char *)pos); 900 } 901 trace_seq_printf(&iter->seq, "(%d)", 902 *(unsigned char *)pos); 903 break; 904 case 2: 905 trace_seq_printf(&iter->seq, "0x%x (%d)", 906 *(unsigned short *)pos, 907 *(unsigned short *)pos); 908 break; 909 case 4: 910 /* dynamic array info is 4 bytes */ 911 if (strstr(field->type, "__data_loc")) { 912 print_array(iter, pos, NULL); 913 break; 914 } 915 916 if (strstr(field->type, "__rel_loc")) { 917 print_array(iter, pos, field); 918 break; 919 } 920 921 trace_seq_printf(&iter->seq, "0x%x (%d)", 922 *(unsigned int *)pos, 923 *(unsigned int *)pos); 924 break; 925 case 8: 926 trace_seq_printf(&iter->seq, "0x%llx (%lld)", 927 *(unsigned long long *)pos, 928 *(unsigned long long *)pos); 929 break; 930 default: 931 trace_seq_puts(&iter->seq, "<INVALID-SIZE>"); 932 break; 933 } 934 break; 935 default: 936 trace_seq_puts(&iter->seq, "<INVALID-TYPE>"); 937 } 938 } 939 trace_seq_putc(&iter->seq, '\n'); 940 } 941 942 enum print_line_t print_event_fields(struct trace_iterator *iter, 943 struct trace_event *event) 944 { 945 struct trace_event_call *call; 946 struct list_head *head; 947 948 /* ftrace defined events have separate call structures */ 949 if (event->type <= __TRACE_LAST_TYPE) { 950 bool found = false; 951 952 down_read(&trace_event_sem); 953 list_for_each_entry(call, &ftrace_events, list) { 954 if (call->event.type == event->type) { 955 found = true; 956 break; 957 } 958 /* No need to search all events */ 959 if (call->event.type > __TRACE_LAST_TYPE) 960 break; 961 } 962 up_read(&trace_event_sem); 963 if (!found) { 964 trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type); 965 goto out; 966 } 967 } else { 968 call = container_of(event, struct trace_event_call, event); 969 } 970 head = trace_get_fields(call); 971 972 trace_seq_printf(&iter->seq, "%s:", trace_event_name(call)); 973 974 if (head && !list_empty(head)) 975 print_fields(iter, call, head); 976 else 977 trace_seq_puts(&iter->seq, "No fields found\n"); 978 979 out: 980 return trace_handle_return(&iter->seq); 981 } 982 983 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, 984 struct trace_event *event) 985 { 986 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); 987 988 return trace_handle_return(&iter->seq); 989 } 990 991 static void print_fn_trace(struct trace_seq *s, unsigned long ip, 992 unsigned long parent_ip, long delta, int flags) 993 { 994 ip += delta; 995 parent_ip += delta; 996 997 seq_print_ip_sym(s, ip, flags); 998 999 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) { 1000 trace_seq_puts(s, " <-"); 1001 seq_print_ip_sym(s, parent_ip, flags); 1002 } 1003 } 1004 1005 /* TRACE_FN */ 1006 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, 1007 struct trace_event *event) 1008 { 1009 struct ftrace_entry *field; 1010 struct trace_seq *s = &iter->seq; 1011 1012 trace_assign_type(field, iter->ent); 1013 1014 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags); 1015 trace_seq_putc(s, '\n'); 1016 1017 return trace_handle_return(s); 1018 } 1019 1020 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, 1021 struct trace_event *event) 1022 { 1023 struct ftrace_entry *field; 1024 1025 trace_assign_type(field, iter->ent); 1026 1027 trace_seq_printf(&iter->seq, "%lx %lx\n", 1028 field->ip, 1029 field->parent_ip); 1030 1031 return trace_handle_return(&iter->seq); 1032 } 1033 1034 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, 1035 struct trace_event *event) 1036 { 1037 struct ftrace_entry *field; 1038 struct trace_seq *s = &iter->seq; 1039 1040 trace_assign_type(field, iter->ent); 1041 1042 SEQ_PUT_HEX_FIELD(s, field->ip); 1043 SEQ_PUT_HEX_FIELD(s, field->parent_ip); 1044 1045 return trace_handle_return(s); 1046 } 1047 1048 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, 1049 struct trace_event *event) 1050 { 1051 struct ftrace_entry *field; 1052 struct trace_seq *s = &iter->seq; 1053 1054 trace_assign_type(field, iter->ent); 1055 1056 SEQ_PUT_FIELD(s, field->ip); 1057 SEQ_PUT_FIELD(s, field->parent_ip); 1058 1059 return trace_handle_return(s); 1060 } 1061 1062 static struct trace_event_functions trace_fn_funcs = { 1063 .trace = trace_fn_trace, 1064 .raw = trace_fn_raw, 1065 .hex = trace_fn_hex, 1066 .binary = trace_fn_bin, 1067 }; 1068 1069 static struct trace_event trace_fn_event = { 1070 .type = TRACE_FN, 1071 .funcs = &trace_fn_funcs, 1072 }; 1073 1074 /* TRACE_CTX an TRACE_WAKE */ 1075 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, 1076 char *delim) 1077 { 1078 struct ctx_switch_entry *field; 1079 char comm[TASK_COMM_LEN]; 1080 int S, T; 1081 1082 1083 trace_assign_type(field, iter->ent); 1084 1085 T = task_index_to_char(field->next_state); 1086 S = task_index_to_char(field->prev_state); 1087 trace_find_cmdline(field->next_pid, comm); 1088 trace_seq_printf(&iter->seq, 1089 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n", 1090 field->prev_pid, 1091 field->prev_prio, 1092 S, delim, 1093 field->next_cpu, 1094 field->next_pid, 1095 field->next_prio, 1096 T, comm); 1097 1098 return trace_handle_return(&iter->seq); 1099 } 1100 1101 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, 1102 struct trace_event *event) 1103 { 1104 return trace_ctxwake_print(iter, "==>"); 1105 } 1106 1107 static enum print_line_t trace_wake_print(struct trace_iterator *iter, 1108 int flags, struct trace_event *event) 1109 { 1110 return trace_ctxwake_print(iter, " +"); 1111 } 1112 1113 static int trace_ctxwake_raw(struct trace_iterator *iter, char S) 1114 { 1115 struct ctx_switch_entry *field; 1116 int T; 1117 1118 trace_assign_type(field, iter->ent); 1119 1120 if (!S) 1121 S = task_index_to_char(field->prev_state); 1122 T = task_index_to_char(field->next_state); 1123 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", 1124 field->prev_pid, 1125 field->prev_prio, 1126 S, 1127 field->next_cpu, 1128 field->next_pid, 1129 field->next_prio, 1130 T); 1131 1132 return trace_handle_return(&iter->seq); 1133 } 1134 1135 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, 1136 struct trace_event *event) 1137 { 1138 return trace_ctxwake_raw(iter, 0); 1139 } 1140 1141 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, 1142 struct trace_event *event) 1143 { 1144 return trace_ctxwake_raw(iter, '+'); 1145 } 1146 1147 1148 static int trace_ctxwake_hex(struct trace_iterator *iter, char S) 1149 { 1150 struct ctx_switch_entry *field; 1151 struct trace_seq *s = &iter->seq; 1152 int T; 1153 1154 trace_assign_type(field, iter->ent); 1155 1156 if (!S) 1157 S = task_index_to_char(field->prev_state); 1158 T = task_index_to_char(field->next_state); 1159 1160 SEQ_PUT_HEX_FIELD(s, field->prev_pid); 1161 SEQ_PUT_HEX_FIELD(s, field->prev_prio); 1162 SEQ_PUT_HEX_FIELD(s, S); 1163 SEQ_PUT_HEX_FIELD(s, field->next_cpu); 1164 SEQ_PUT_HEX_FIELD(s, field->next_pid); 1165 SEQ_PUT_HEX_FIELD(s, field->next_prio); 1166 SEQ_PUT_HEX_FIELD(s, T); 1167 1168 return trace_handle_return(s); 1169 } 1170 1171 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, 1172 struct trace_event *event) 1173 { 1174 return trace_ctxwake_hex(iter, 0); 1175 } 1176 1177 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, 1178 struct trace_event *event) 1179 { 1180 return trace_ctxwake_hex(iter, '+'); 1181 } 1182 1183 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, 1184 int flags, struct trace_event *event) 1185 { 1186 struct ctx_switch_entry *field; 1187 struct trace_seq *s = &iter->seq; 1188 1189 trace_assign_type(field, iter->ent); 1190 1191 SEQ_PUT_FIELD(s, field->prev_pid); 1192 SEQ_PUT_FIELD(s, field->prev_prio); 1193 SEQ_PUT_FIELD(s, field->prev_state); 1194 SEQ_PUT_FIELD(s, field->next_cpu); 1195 SEQ_PUT_FIELD(s, field->next_pid); 1196 SEQ_PUT_FIELD(s, field->next_prio); 1197 SEQ_PUT_FIELD(s, field->next_state); 1198 1199 return trace_handle_return(s); 1200 } 1201 1202 static struct trace_event_functions trace_ctx_funcs = { 1203 .trace = trace_ctx_print, 1204 .raw = trace_ctx_raw, 1205 .hex = trace_ctx_hex, 1206 .binary = trace_ctxwake_bin, 1207 }; 1208 1209 static struct trace_event trace_ctx_event = { 1210 .type = TRACE_CTX, 1211 .funcs = &trace_ctx_funcs, 1212 }; 1213 1214 static struct trace_event_functions trace_wake_funcs = { 1215 .trace = trace_wake_print, 1216 .raw = trace_wake_raw, 1217 .hex = trace_wake_hex, 1218 .binary = trace_ctxwake_bin, 1219 }; 1220 1221 static struct trace_event trace_wake_event = { 1222 .type = TRACE_WAKE, 1223 .funcs = &trace_wake_funcs, 1224 }; 1225 1226 /* TRACE_STACK */ 1227 1228 static enum print_line_t trace_stack_print(struct trace_iterator *iter, 1229 int flags, struct trace_event *event) 1230 { 1231 struct stack_entry *field; 1232 struct trace_seq *s = &iter->seq; 1233 unsigned long *p; 1234 unsigned long *end; 1235 long delta = iter->tr->text_delta; 1236 1237 trace_assign_type(field, iter->ent); 1238 end = (unsigned long *)((long)iter->ent + iter->ent_size); 1239 1240 trace_seq_puts(s, "<stack trace>\n"); 1241 1242 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) { 1243 1244 if (trace_seq_has_overflowed(s)) 1245 break; 1246 1247 trace_seq_puts(s, " => "); 1248 if ((*p) == FTRACE_TRAMPOLINE_MARKER) { 1249 trace_seq_puts(s, "[FTRACE TRAMPOLINE]\n"); 1250 continue; 1251 } 1252 seq_print_ip_sym(s, (*p) + delta, flags); 1253 trace_seq_putc(s, '\n'); 1254 } 1255 1256 return trace_handle_return(s); 1257 } 1258 1259 static struct trace_event_functions trace_stack_funcs = { 1260 .trace = trace_stack_print, 1261 }; 1262 1263 static struct trace_event trace_stack_event = { 1264 .type = TRACE_STACK, 1265 .funcs = &trace_stack_funcs, 1266 }; 1267 1268 /* TRACE_USER_STACK */ 1269 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, 1270 int flags, struct trace_event *event) 1271 { 1272 struct trace_array *tr = iter->tr; 1273 struct userstack_entry *field; 1274 struct trace_seq *s = &iter->seq; 1275 struct mm_struct *mm = NULL; 1276 unsigned int i; 1277 1278 trace_assign_type(field, iter->ent); 1279 1280 trace_seq_puts(s, "<user stack trace>\n"); 1281 1282 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { 1283 struct task_struct *task; 1284 /* 1285 * we do the lookup on the thread group leader, 1286 * since individual threads might have already quit! 1287 */ 1288 rcu_read_lock(); 1289 task = find_task_by_vpid(field->tgid); 1290 if (task) 1291 mm = get_task_mm(task); 1292 rcu_read_unlock(); 1293 } 1294 1295 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { 1296 unsigned long ip = field->caller[i]; 1297 1298 if (!ip || trace_seq_has_overflowed(s)) 1299 break; 1300 1301 trace_seq_puts(s, " => "); 1302 seq_print_user_ip(s, mm, ip, flags); 1303 trace_seq_putc(s, '\n'); 1304 } 1305 1306 if (mm) 1307 mmput(mm); 1308 1309 return trace_handle_return(s); 1310 } 1311 1312 static struct trace_event_functions trace_user_stack_funcs = { 1313 .trace = trace_user_stack_print, 1314 }; 1315 1316 static struct trace_event trace_user_stack_event = { 1317 .type = TRACE_USER_STACK, 1318 .funcs = &trace_user_stack_funcs, 1319 }; 1320 1321 /* TRACE_HWLAT */ 1322 static enum print_line_t 1323 trace_hwlat_print(struct trace_iterator *iter, int flags, 1324 struct trace_event *event) 1325 { 1326 struct trace_entry *entry = iter->ent; 1327 struct trace_seq *s = &iter->seq; 1328 struct hwlat_entry *field; 1329 1330 trace_assign_type(field, entry); 1331 1332 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d", 1333 field->seqnum, 1334 field->duration, 1335 field->outer_duration, 1336 (long long)field->timestamp.tv_sec, 1337 field->timestamp.tv_nsec, field->count); 1338 1339 if (field->nmi_count) { 1340 /* 1341 * The generic sched_clock() is not NMI safe, thus 1342 * we only record the count and not the time. 1343 */ 1344 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) 1345 trace_seq_printf(s, " nmi-total:%llu", 1346 field->nmi_total_ts); 1347 trace_seq_printf(s, " nmi-count:%u", 1348 field->nmi_count); 1349 } 1350 1351 trace_seq_putc(s, '\n'); 1352 1353 return trace_handle_return(s); 1354 } 1355 1356 static enum print_line_t 1357 trace_hwlat_raw(struct trace_iterator *iter, int flags, 1358 struct trace_event *event) 1359 { 1360 struct hwlat_entry *field; 1361 struct trace_seq *s = &iter->seq; 1362 1363 trace_assign_type(field, iter->ent); 1364 1365 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", 1366 field->duration, 1367 field->outer_duration, 1368 (long long)field->timestamp.tv_sec, 1369 field->timestamp.tv_nsec, 1370 field->seqnum); 1371 1372 return trace_handle_return(s); 1373 } 1374 1375 static struct trace_event_functions trace_hwlat_funcs = { 1376 .trace = trace_hwlat_print, 1377 .raw = trace_hwlat_raw, 1378 }; 1379 1380 static struct trace_event trace_hwlat_event = { 1381 .type = TRACE_HWLAT, 1382 .funcs = &trace_hwlat_funcs, 1383 }; 1384 1385 /* TRACE_OSNOISE */ 1386 static enum print_line_t 1387 trace_osnoise_print(struct trace_iterator *iter, int flags, 1388 struct trace_event *event) 1389 { 1390 struct trace_entry *entry = iter->ent; 1391 struct trace_seq *s = &iter->seq; 1392 struct osnoise_entry *field; 1393 u64 ratio, ratio_dec; 1394 u64 net_runtime; 1395 1396 trace_assign_type(field, entry); 1397 1398 /* 1399 * compute the available % of cpu time. 1400 */ 1401 net_runtime = field->runtime - field->noise; 1402 ratio = net_runtime * 10000000; 1403 do_div(ratio, field->runtime); 1404 ratio_dec = do_div(ratio, 100000); 1405 1406 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu", 1407 field->runtime, 1408 field->noise, 1409 ratio, ratio_dec, 1410 field->max_sample); 1411 1412 trace_seq_printf(s, " %6u", field->hw_count); 1413 trace_seq_printf(s, " %6u", field->nmi_count); 1414 trace_seq_printf(s, " %6u", field->irq_count); 1415 trace_seq_printf(s, " %6u", field->softirq_count); 1416 trace_seq_printf(s, " %6u", field->thread_count); 1417 1418 trace_seq_putc(s, '\n'); 1419 1420 return trace_handle_return(s); 1421 } 1422 1423 static enum print_line_t 1424 trace_osnoise_raw(struct trace_iterator *iter, int flags, 1425 struct trace_event *event) 1426 { 1427 struct osnoise_entry *field; 1428 struct trace_seq *s = &iter->seq; 1429 1430 trace_assign_type(field, iter->ent); 1431 1432 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n", 1433 field->runtime, 1434 field->noise, 1435 field->max_sample, 1436 field->hw_count, 1437 field->nmi_count, 1438 field->irq_count, 1439 field->softirq_count, 1440 field->thread_count); 1441 1442 return trace_handle_return(s); 1443 } 1444 1445 static struct trace_event_functions trace_osnoise_funcs = { 1446 .trace = trace_osnoise_print, 1447 .raw = trace_osnoise_raw, 1448 }; 1449 1450 static struct trace_event trace_osnoise_event = { 1451 .type = TRACE_OSNOISE, 1452 .funcs = &trace_osnoise_funcs, 1453 }; 1454 1455 /* TRACE_TIMERLAT */ 1456 1457 static char *timerlat_lat_context[] = {"irq", "thread", "user-ret"}; 1458 static enum print_line_t 1459 trace_timerlat_print(struct trace_iterator *iter, int flags, 1460 struct trace_event *event) 1461 { 1462 struct trace_entry *entry = iter->ent; 1463 struct trace_seq *s = &iter->seq; 1464 struct timerlat_entry *field; 1465 1466 trace_assign_type(field, entry); 1467 1468 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n", 1469 field->seqnum, 1470 timerlat_lat_context[field->context], 1471 field->timer_latency); 1472 1473 return trace_handle_return(s); 1474 } 1475 1476 static enum print_line_t 1477 trace_timerlat_raw(struct trace_iterator *iter, int flags, 1478 struct trace_event *event) 1479 { 1480 struct timerlat_entry *field; 1481 struct trace_seq *s = &iter->seq; 1482 1483 trace_assign_type(field, iter->ent); 1484 1485 trace_seq_printf(s, "%u %d %llu\n", 1486 field->seqnum, 1487 field->context, 1488 field->timer_latency); 1489 1490 return trace_handle_return(s); 1491 } 1492 1493 static struct trace_event_functions trace_timerlat_funcs = { 1494 .trace = trace_timerlat_print, 1495 .raw = trace_timerlat_raw, 1496 }; 1497 1498 static struct trace_event trace_timerlat_event = { 1499 .type = TRACE_TIMERLAT, 1500 .funcs = &trace_timerlat_funcs, 1501 }; 1502 1503 /* TRACE_BPUTS */ 1504 static enum print_line_t 1505 trace_bputs_print(struct trace_iterator *iter, int flags, 1506 struct trace_event *event) 1507 { 1508 struct trace_entry *entry = iter->ent; 1509 struct trace_seq *s = &iter->seq; 1510 struct bputs_entry *field; 1511 1512 trace_assign_type(field, entry); 1513 1514 seq_print_ip_sym(s, field->ip, flags); 1515 trace_seq_puts(s, ": "); 1516 trace_seq_puts(s, field->str); 1517 1518 return trace_handle_return(s); 1519 } 1520 1521 1522 static enum print_line_t 1523 trace_bputs_raw(struct trace_iterator *iter, int flags, 1524 struct trace_event *event) 1525 { 1526 struct bputs_entry *field; 1527 struct trace_seq *s = &iter->seq; 1528 1529 trace_assign_type(field, iter->ent); 1530 1531 trace_seq_printf(s, ": %lx : ", field->ip); 1532 trace_seq_puts(s, field->str); 1533 1534 return trace_handle_return(s); 1535 } 1536 1537 static struct trace_event_functions trace_bputs_funcs = { 1538 .trace = trace_bputs_print, 1539 .raw = trace_bputs_raw, 1540 }; 1541 1542 static struct trace_event trace_bputs_event = { 1543 .type = TRACE_BPUTS, 1544 .funcs = &trace_bputs_funcs, 1545 }; 1546 1547 /* TRACE_BPRINT */ 1548 static enum print_line_t 1549 trace_bprint_print(struct trace_iterator *iter, int flags, 1550 struct trace_event *event) 1551 { 1552 struct trace_entry *entry = iter->ent; 1553 struct trace_seq *s = &iter->seq; 1554 struct bprint_entry *field; 1555 1556 trace_assign_type(field, entry); 1557 1558 seq_print_ip_sym(s, field->ip, flags); 1559 trace_seq_puts(s, ": "); 1560 trace_seq_bprintf(s, field->fmt, field->buf); 1561 1562 return trace_handle_return(s); 1563 } 1564 1565 1566 static enum print_line_t 1567 trace_bprint_raw(struct trace_iterator *iter, int flags, 1568 struct trace_event *event) 1569 { 1570 struct bprint_entry *field; 1571 struct trace_seq *s = &iter->seq; 1572 1573 trace_assign_type(field, iter->ent); 1574 1575 trace_seq_printf(s, ": %lx : ", field->ip); 1576 trace_seq_bprintf(s, field->fmt, field->buf); 1577 1578 return trace_handle_return(s); 1579 } 1580 1581 static struct trace_event_functions trace_bprint_funcs = { 1582 .trace = trace_bprint_print, 1583 .raw = trace_bprint_raw, 1584 }; 1585 1586 static struct trace_event trace_bprint_event = { 1587 .type = TRACE_BPRINT, 1588 .funcs = &trace_bprint_funcs, 1589 }; 1590 1591 /* TRACE_PRINT */ 1592 static enum print_line_t trace_print_print(struct trace_iterator *iter, 1593 int flags, struct trace_event *event) 1594 { 1595 struct print_entry *field; 1596 struct trace_seq *s = &iter->seq; 1597 unsigned long ip; 1598 1599 trace_assign_type(field, iter->ent); 1600 1601 ip = field->ip + iter->tr->text_delta; 1602 1603 seq_print_ip_sym(s, ip, flags); 1604 trace_seq_printf(s, ": %s", field->buf); 1605 1606 return trace_handle_return(s); 1607 } 1608 1609 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, 1610 struct trace_event *event) 1611 { 1612 struct print_entry *field; 1613 1614 trace_assign_type(field, iter->ent); 1615 1616 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); 1617 1618 return trace_handle_return(&iter->seq); 1619 } 1620 1621 static struct trace_event_functions trace_print_funcs = { 1622 .trace = trace_print_print, 1623 .raw = trace_print_raw, 1624 }; 1625 1626 static struct trace_event trace_print_event = { 1627 .type = TRACE_PRINT, 1628 .funcs = &trace_print_funcs, 1629 }; 1630 1631 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, 1632 struct trace_event *event) 1633 { 1634 struct raw_data_entry *field; 1635 int i; 1636 1637 trace_assign_type(field, iter->ent); 1638 1639 trace_seq_printf(&iter->seq, "# %x buf:", field->id); 1640 1641 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) 1642 trace_seq_printf(&iter->seq, " %02x", 1643 (unsigned char)field->buf[i]); 1644 1645 trace_seq_putc(&iter->seq, '\n'); 1646 1647 return trace_handle_return(&iter->seq); 1648 } 1649 1650 static struct trace_event_functions trace_raw_data_funcs = { 1651 .trace = trace_raw_data, 1652 .raw = trace_raw_data, 1653 }; 1654 1655 static struct trace_event trace_raw_data_event = { 1656 .type = TRACE_RAW_DATA, 1657 .funcs = &trace_raw_data_funcs, 1658 }; 1659 1660 static enum print_line_t 1661 trace_func_repeats_raw(struct trace_iterator *iter, int flags, 1662 struct trace_event *event) 1663 { 1664 struct func_repeats_entry *field; 1665 struct trace_seq *s = &iter->seq; 1666 1667 trace_assign_type(field, iter->ent); 1668 1669 trace_seq_printf(s, "%lu %lu %u %llu\n", 1670 field->ip, 1671 field->parent_ip, 1672 field->count, 1673 FUNC_REPEATS_GET_DELTA_TS(field)); 1674 1675 return trace_handle_return(s); 1676 } 1677 1678 static enum print_line_t 1679 trace_func_repeats_print(struct trace_iterator *iter, int flags, 1680 struct trace_event *event) 1681 { 1682 struct func_repeats_entry *field; 1683 struct trace_seq *s = &iter->seq; 1684 1685 trace_assign_type(field, iter->ent); 1686 1687 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags); 1688 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count); 1689 trace_print_time(s, iter, 1690 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field)); 1691 trace_seq_puts(s, ")\n"); 1692 1693 return trace_handle_return(s); 1694 } 1695 1696 static struct trace_event_functions trace_func_repeats_funcs = { 1697 .trace = trace_func_repeats_print, 1698 .raw = trace_func_repeats_raw, 1699 }; 1700 1701 static struct trace_event trace_func_repeats_event = { 1702 .type = TRACE_FUNC_REPEATS, 1703 .funcs = &trace_func_repeats_funcs, 1704 }; 1705 1706 static struct trace_event *events[] __initdata = { 1707 &trace_fn_event, 1708 &trace_ctx_event, 1709 &trace_wake_event, 1710 &trace_stack_event, 1711 &trace_user_stack_event, 1712 &trace_bputs_event, 1713 &trace_bprint_event, 1714 &trace_print_event, 1715 &trace_hwlat_event, 1716 &trace_osnoise_event, 1717 &trace_timerlat_event, 1718 &trace_raw_data_event, 1719 &trace_func_repeats_event, 1720 NULL 1721 }; 1722 1723 __init int init_events(void) 1724 { 1725 struct trace_event *event; 1726 int i, ret; 1727 1728 for (i = 0; events[i]; i++) { 1729 event = events[i]; 1730 ret = register_trace_event(event); 1731 WARN_ONCE(!ret, "event %d failed to register", event->type); 1732 } 1733 1734 return 0; 1735 } 1736