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 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : 464 '.'; 465 466 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | 467 TRACE_FLAG_PREEMPT_RESCHED)) { 468 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: 469 need_resched = 'N'; 470 break; 471 case TRACE_FLAG_NEED_RESCHED: 472 need_resched = 'n'; 473 break; 474 case TRACE_FLAG_PREEMPT_RESCHED: 475 need_resched = 'p'; 476 break; 477 default: 478 need_resched = '.'; 479 break; 480 } 481 482 hardsoft_irq = 483 (nmi && hardirq) ? 'Z' : 484 nmi ? 'z' : 485 (hardirq && softirq) ? 'H' : 486 hardirq ? 'h' : 487 softirq ? 's' : 488 '.' ; 489 490 trace_seq_printf(s, "%c%c%c", 491 irqs_off, need_resched, hardsoft_irq); 492 493 if (entry->preempt_count & 0xf) 494 trace_seq_printf(s, "%x", entry->preempt_count & 0xf); 495 else 496 trace_seq_putc(s, '.'); 497 498 if (entry->preempt_count & 0xf0) 499 trace_seq_printf(s, "%x", entry->preempt_count >> 4); 500 else 501 trace_seq_putc(s, '.'); 502 503 return !trace_seq_has_overflowed(s); 504 } 505 506 static int 507 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) 508 { 509 char comm[TASK_COMM_LEN]; 510 511 trace_find_cmdline(entry->pid, comm); 512 513 trace_seq_printf(s, "%8.8s-%-7d %3d", 514 comm, entry->pid, cpu); 515 516 return trace_print_lat_fmt(s, entry); 517 } 518 519 #undef MARK 520 #define MARK(v, s) {.val = v, .sym = s} 521 /* trace overhead mark */ 522 static const struct trace_mark { 523 unsigned long long val; /* unit: nsec */ 524 char sym; 525 } mark[] = { 526 MARK(1000000000ULL , '$'), /* 1 sec */ 527 MARK(100000000ULL , '@'), /* 100 msec */ 528 MARK(10000000ULL , '*'), /* 10 msec */ 529 MARK(1000000ULL , '#'), /* 1000 usecs */ 530 MARK(100000ULL , '!'), /* 100 usecs */ 531 MARK(10000ULL , '+'), /* 10 usecs */ 532 }; 533 #undef MARK 534 535 char trace_find_mark(unsigned long long d) 536 { 537 int i; 538 int size = ARRAY_SIZE(mark); 539 540 for (i = 0; i < size; i++) { 541 if (d > mark[i].val) 542 break; 543 } 544 545 return (i == size) ? ' ' : mark[i].sym; 546 } 547 548 static int 549 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) 550 { 551 struct trace_array *tr = iter->tr; 552 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; 553 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; 554 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start; 555 unsigned long long rel_ts = next_ts - iter->ts; 556 struct trace_seq *s = &iter->seq; 557 558 if (in_ns) { 559 abs_ts = ns2usecs(abs_ts); 560 rel_ts = ns2usecs(rel_ts); 561 } 562 563 if (verbose && in_ns) { 564 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); 565 unsigned long abs_msec = (unsigned long)abs_ts; 566 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); 567 unsigned long rel_msec = (unsigned long)rel_ts; 568 569 trace_seq_printf( 570 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", 571 ns2usecs(iter->ts), 572 abs_msec, abs_usec, 573 rel_msec, rel_usec); 574 575 } else if (verbose && !in_ns) { 576 trace_seq_printf( 577 s, "[%016llx] %lld (+%lld): ", 578 iter->ts, abs_ts, rel_ts); 579 580 } else if (!verbose && in_ns) { 581 trace_seq_printf( 582 s, " %4lldus%c: ", 583 abs_ts, 584 trace_find_mark(rel_ts * NSEC_PER_USEC)); 585 586 } else { /* !verbose && !in_ns */ 587 trace_seq_printf(s, " %4lld: ", abs_ts); 588 } 589 590 return !trace_seq_has_overflowed(s); 591 } 592 593 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter, 594 unsigned long long ts) 595 { 596 unsigned long secs, usec_rem; 597 unsigned long long t; 598 599 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { 600 t = ns2usecs(ts); 601 usec_rem = do_div(t, USEC_PER_SEC); 602 secs = (unsigned long)t; 603 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem); 604 } else 605 trace_seq_printf(s, " %12llu", ts); 606 } 607 608 int trace_print_context(struct trace_iterator *iter) 609 { 610 struct trace_array *tr = iter->tr; 611 struct trace_seq *s = &iter->seq; 612 struct trace_entry *entry = iter->ent; 613 char comm[TASK_COMM_LEN]; 614 615 trace_find_cmdline(entry->pid, comm); 616 617 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid); 618 619 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) { 620 unsigned int tgid = trace_find_tgid(entry->pid); 621 622 if (!tgid) 623 trace_seq_printf(s, "(-------) "); 624 else 625 trace_seq_printf(s, "(%7d) ", tgid); 626 } 627 628 trace_seq_printf(s, "[%03d] ", iter->cpu); 629 630 if (tr->trace_flags & TRACE_ITER_IRQ_INFO) 631 trace_print_lat_fmt(s, entry); 632 633 trace_print_time(s, iter, iter->ts); 634 trace_seq_puts(s, ": "); 635 636 return !trace_seq_has_overflowed(s); 637 } 638 639 int trace_print_lat_context(struct trace_iterator *iter) 640 { 641 struct trace_entry *entry, *next_entry; 642 struct trace_array *tr = iter->tr; 643 struct trace_seq *s = &iter->seq; 644 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); 645 u64 next_ts; 646 647 next_entry = trace_find_next_entry(iter, NULL, &next_ts); 648 if (!next_entry) 649 next_ts = iter->ts; 650 651 /* trace_find_next_entry() may change iter->ent */ 652 entry = iter->ent; 653 654 if (verbose) { 655 char comm[TASK_COMM_LEN]; 656 657 trace_find_cmdline(entry->pid, comm); 658 659 trace_seq_printf( 660 s, "%16s %7d %3d %d %08x %08lx ", 661 comm, entry->pid, iter->cpu, entry->flags, 662 entry->preempt_count & 0xf, iter->idx); 663 } else { 664 lat_print_generic(s, entry, iter->cpu); 665 } 666 667 lat_print_timestamp(iter, next_ts); 668 669 return !trace_seq_has_overflowed(s); 670 } 671 672 /** 673 * ftrace_find_event - find a registered event 674 * @type: the type of event to look for 675 * 676 * Returns an event of type @type otherwise NULL 677 * Called with trace_event_read_lock() held. 678 */ 679 struct trace_event *ftrace_find_event(int type) 680 { 681 struct trace_event *event; 682 unsigned key; 683 684 key = type & (EVENT_HASHSIZE - 1); 685 686 hlist_for_each_entry(event, &event_hash[key], node) { 687 if (event->type == type) 688 return event; 689 } 690 691 return NULL; 692 } 693 694 static DEFINE_IDA(trace_event_ida); 695 696 static void free_trace_event_type(int type) 697 { 698 if (type >= __TRACE_LAST_TYPE) 699 ida_free(&trace_event_ida, type); 700 } 701 702 static int alloc_trace_event_type(void) 703 { 704 int next; 705 706 /* Skip static defined type numbers */ 707 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE, 708 TRACE_EVENT_TYPE_MAX, GFP_KERNEL); 709 if (next < 0) 710 return 0; 711 return next; 712 } 713 714 void trace_event_read_lock(void) 715 { 716 down_read(&trace_event_sem); 717 } 718 719 void trace_event_read_unlock(void) 720 { 721 up_read(&trace_event_sem); 722 } 723 724 /** 725 * register_trace_event - register output for an event type 726 * @event: the event type to register 727 * 728 * Event types are stored in a hash and this hash is used to 729 * find a way to print an event. If the @event->type is set 730 * then it will use that type, otherwise it will assign a 731 * type to use. 732 * 733 * If you assign your own type, please make sure it is added 734 * to the trace_type enum in trace.h, to avoid collisions 735 * with the dynamic types. 736 * 737 * Returns the event type number or zero on error. 738 */ 739 int register_trace_event(struct trace_event *event) 740 { 741 unsigned key; 742 int ret = 0; 743 744 down_write(&trace_event_sem); 745 746 if (WARN_ON(!event)) 747 goto out; 748 749 if (WARN_ON(!event->funcs)) 750 goto out; 751 752 if (!event->type) { 753 event->type = alloc_trace_event_type(); 754 if (!event->type) 755 goto out; 756 } else if (WARN(event->type > __TRACE_LAST_TYPE, 757 "Need to add type to trace.h")) { 758 goto out; 759 } else { 760 /* Is this event already used */ 761 if (ftrace_find_event(event->type)) 762 goto out; 763 } 764 765 if (event->funcs->trace == NULL) 766 event->funcs->trace = trace_nop_print; 767 if (event->funcs->raw == NULL) 768 event->funcs->raw = trace_nop_print; 769 if (event->funcs->hex == NULL) 770 event->funcs->hex = trace_nop_print; 771 if (event->funcs->binary == NULL) 772 event->funcs->binary = trace_nop_print; 773 774 key = event->type & (EVENT_HASHSIZE - 1); 775 776 hlist_add_head(&event->node, &event_hash[key]); 777 778 ret = event->type; 779 out: 780 up_write(&trace_event_sem); 781 782 return ret; 783 } 784 EXPORT_SYMBOL_GPL(register_trace_event); 785 786 /* 787 * Used by module code with the trace_event_sem held for write. 788 */ 789 int __unregister_trace_event(struct trace_event *event) 790 { 791 hlist_del(&event->node); 792 free_trace_event_type(event->type); 793 return 0; 794 } 795 796 /** 797 * unregister_trace_event - remove a no longer used event 798 * @event: the event to remove 799 */ 800 int unregister_trace_event(struct trace_event *event) 801 { 802 down_write(&trace_event_sem); 803 __unregister_trace_event(event); 804 up_write(&trace_event_sem); 805 806 return 0; 807 } 808 EXPORT_SYMBOL_GPL(unregister_trace_event); 809 810 /* 811 * Standard events 812 */ 813 814 static void print_array(struct trace_iterator *iter, void *pos, 815 struct ftrace_event_field *field) 816 { 817 int offset; 818 int len; 819 int i; 820 821 offset = *(int *)pos & 0xffff; 822 len = *(int *)pos >> 16; 823 824 if (field) 825 offset += field->offset + sizeof(int); 826 827 if (offset + len > iter->ent_size) { 828 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 829 return; 830 } 831 832 pos = (void *)iter->ent + offset; 833 834 for (i = 0; i < len; i++, pos++) { 835 if (i) 836 trace_seq_putc(&iter->seq, ','); 837 trace_seq_printf(&iter->seq, "%02x", *(unsigned char *)pos); 838 } 839 } 840 841 static void print_fields(struct trace_iterator *iter, struct trace_event_call *call, 842 struct list_head *head) 843 { 844 struct ftrace_event_field *field; 845 int offset; 846 int len; 847 int ret; 848 void *pos; 849 850 list_for_each_entry_reverse(field, head, link) { 851 trace_seq_printf(&iter->seq, " %s=", field->name); 852 if (field->offset + field->size > iter->ent_size) { 853 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 854 continue; 855 } 856 pos = (void *)iter->ent + field->offset; 857 858 switch (field->filter_type) { 859 case FILTER_COMM: 860 case FILTER_STATIC_STRING: 861 trace_seq_printf(&iter->seq, "%.*s", field->size, (char *)pos); 862 break; 863 case FILTER_RDYN_STRING: 864 case FILTER_DYN_STRING: 865 offset = *(int *)pos & 0xffff; 866 len = *(int *)pos >> 16; 867 868 if (field->filter_type == FILTER_RDYN_STRING) 869 offset += field->offset + sizeof(int); 870 871 if (offset + len > iter->ent_size) { 872 trace_seq_puts(&iter->seq, "<OVERFLOW>"); 873 break; 874 } 875 pos = (void *)iter->ent + offset; 876 trace_seq_printf(&iter->seq, "%.*s", len, (char *)pos); 877 break; 878 case FILTER_PTR_STRING: 879 if (!iter->fmt_size) 880 trace_iter_expand_format(iter); 881 pos = *(void **)pos; 882 ret = strncpy_from_kernel_nofault(iter->fmt, pos, 883 iter->fmt_size); 884 if (ret < 0) 885 trace_seq_printf(&iter->seq, "(0x%px)", pos); 886 else 887 trace_seq_printf(&iter->seq, "(0x%px:%s)", 888 pos, iter->fmt); 889 break; 890 case FILTER_TRACE_FN: 891 pos = *(void **)pos; 892 trace_seq_printf(&iter->seq, "%pS", pos); 893 break; 894 case FILTER_CPU: 895 case FILTER_OTHER: 896 switch (field->size) { 897 case 1: 898 if (isprint(*(char *)pos)) { 899 trace_seq_printf(&iter->seq, "'%c'", 900 *(unsigned char *)pos); 901 } 902 trace_seq_printf(&iter->seq, "(%d)", 903 *(unsigned char *)pos); 904 break; 905 case 2: 906 trace_seq_printf(&iter->seq, "0x%x (%d)", 907 *(unsigned short *)pos, 908 *(unsigned short *)pos); 909 break; 910 case 4: 911 /* dynamic array info is 4 bytes */ 912 if (strstr(field->type, "__data_loc")) { 913 print_array(iter, pos, NULL); 914 break; 915 } 916 917 if (strstr(field->type, "__rel_loc")) { 918 print_array(iter, pos, field); 919 break; 920 } 921 922 trace_seq_printf(&iter->seq, "0x%x (%d)", 923 *(unsigned int *)pos, 924 *(unsigned int *)pos); 925 break; 926 case 8: 927 trace_seq_printf(&iter->seq, "0x%llx (%lld)", 928 *(unsigned long long *)pos, 929 *(unsigned long long *)pos); 930 break; 931 default: 932 trace_seq_puts(&iter->seq, "<INVALID-SIZE>"); 933 break; 934 } 935 break; 936 default: 937 trace_seq_puts(&iter->seq, "<INVALID-TYPE>"); 938 } 939 } 940 trace_seq_putc(&iter->seq, '\n'); 941 } 942 943 enum print_line_t print_event_fields(struct trace_iterator *iter, 944 struct trace_event *event) 945 { 946 struct trace_event_call *call; 947 struct list_head *head; 948 949 /* ftrace defined events have separate call structures */ 950 if (event->type <= __TRACE_LAST_TYPE) { 951 bool found = false; 952 953 down_read(&trace_event_sem); 954 list_for_each_entry(call, &ftrace_events, list) { 955 if (call->event.type == event->type) { 956 found = true; 957 break; 958 } 959 /* No need to search all events */ 960 if (call->event.type > __TRACE_LAST_TYPE) 961 break; 962 } 963 up_read(&trace_event_sem); 964 if (!found) { 965 trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type); 966 goto out; 967 } 968 } else { 969 call = container_of(event, struct trace_event_call, event); 970 } 971 head = trace_get_fields(call); 972 973 trace_seq_printf(&iter->seq, "%s:", trace_event_name(call)); 974 975 if (head && !list_empty(head)) 976 print_fields(iter, call, head); 977 else 978 trace_seq_puts(&iter->seq, "No fields found\n"); 979 980 out: 981 return trace_handle_return(&iter->seq); 982 } 983 984 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, 985 struct trace_event *event) 986 { 987 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); 988 989 return trace_handle_return(&iter->seq); 990 } 991 992 static void print_fn_trace(struct trace_seq *s, unsigned long ip, 993 unsigned long parent_ip, int flags) 994 { 995 seq_print_ip_sym(s, ip, flags); 996 997 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) { 998 trace_seq_puts(s, " <-"); 999 seq_print_ip_sym(s, parent_ip, flags); 1000 } 1001 } 1002 1003 /* TRACE_FN */ 1004 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, 1005 struct trace_event *event) 1006 { 1007 struct ftrace_entry *field; 1008 struct trace_seq *s = &iter->seq; 1009 1010 trace_assign_type(field, iter->ent); 1011 1012 print_fn_trace(s, field->ip, field->parent_ip, flags); 1013 trace_seq_putc(s, '\n'); 1014 1015 return trace_handle_return(s); 1016 } 1017 1018 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, 1019 struct trace_event *event) 1020 { 1021 struct ftrace_entry *field; 1022 1023 trace_assign_type(field, iter->ent); 1024 1025 trace_seq_printf(&iter->seq, "%lx %lx\n", 1026 field->ip, 1027 field->parent_ip); 1028 1029 return trace_handle_return(&iter->seq); 1030 } 1031 1032 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, 1033 struct trace_event *event) 1034 { 1035 struct ftrace_entry *field; 1036 struct trace_seq *s = &iter->seq; 1037 1038 trace_assign_type(field, iter->ent); 1039 1040 SEQ_PUT_HEX_FIELD(s, field->ip); 1041 SEQ_PUT_HEX_FIELD(s, field->parent_ip); 1042 1043 return trace_handle_return(s); 1044 } 1045 1046 static enum print_line_t trace_fn_bin(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_FIELD(s, field->ip); 1055 SEQ_PUT_FIELD(s, field->parent_ip); 1056 1057 return trace_handle_return(s); 1058 } 1059 1060 static struct trace_event_functions trace_fn_funcs = { 1061 .trace = trace_fn_trace, 1062 .raw = trace_fn_raw, 1063 .hex = trace_fn_hex, 1064 .binary = trace_fn_bin, 1065 }; 1066 1067 static struct trace_event trace_fn_event = { 1068 .type = TRACE_FN, 1069 .funcs = &trace_fn_funcs, 1070 }; 1071 1072 /* TRACE_CTX an TRACE_WAKE */ 1073 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, 1074 char *delim) 1075 { 1076 struct ctx_switch_entry *field; 1077 char comm[TASK_COMM_LEN]; 1078 int S, T; 1079 1080 1081 trace_assign_type(field, iter->ent); 1082 1083 T = task_index_to_char(field->next_state); 1084 S = task_index_to_char(field->prev_state); 1085 trace_find_cmdline(field->next_pid, comm); 1086 trace_seq_printf(&iter->seq, 1087 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n", 1088 field->prev_pid, 1089 field->prev_prio, 1090 S, delim, 1091 field->next_cpu, 1092 field->next_pid, 1093 field->next_prio, 1094 T, comm); 1095 1096 return trace_handle_return(&iter->seq); 1097 } 1098 1099 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, 1100 struct trace_event *event) 1101 { 1102 return trace_ctxwake_print(iter, "==>"); 1103 } 1104 1105 static enum print_line_t trace_wake_print(struct trace_iterator *iter, 1106 int flags, struct trace_event *event) 1107 { 1108 return trace_ctxwake_print(iter, " +"); 1109 } 1110 1111 static int trace_ctxwake_raw(struct trace_iterator *iter, char S) 1112 { 1113 struct ctx_switch_entry *field; 1114 int T; 1115 1116 trace_assign_type(field, iter->ent); 1117 1118 if (!S) 1119 S = task_index_to_char(field->prev_state); 1120 T = task_index_to_char(field->next_state); 1121 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", 1122 field->prev_pid, 1123 field->prev_prio, 1124 S, 1125 field->next_cpu, 1126 field->next_pid, 1127 field->next_prio, 1128 T); 1129 1130 return trace_handle_return(&iter->seq); 1131 } 1132 1133 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, 1134 struct trace_event *event) 1135 { 1136 return trace_ctxwake_raw(iter, 0); 1137 } 1138 1139 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, 1140 struct trace_event *event) 1141 { 1142 return trace_ctxwake_raw(iter, '+'); 1143 } 1144 1145 1146 static int trace_ctxwake_hex(struct trace_iterator *iter, char S) 1147 { 1148 struct ctx_switch_entry *field; 1149 struct trace_seq *s = &iter->seq; 1150 int T; 1151 1152 trace_assign_type(field, iter->ent); 1153 1154 if (!S) 1155 S = task_index_to_char(field->prev_state); 1156 T = task_index_to_char(field->next_state); 1157 1158 SEQ_PUT_HEX_FIELD(s, field->prev_pid); 1159 SEQ_PUT_HEX_FIELD(s, field->prev_prio); 1160 SEQ_PUT_HEX_FIELD(s, S); 1161 SEQ_PUT_HEX_FIELD(s, field->next_cpu); 1162 SEQ_PUT_HEX_FIELD(s, field->next_pid); 1163 SEQ_PUT_HEX_FIELD(s, field->next_prio); 1164 SEQ_PUT_HEX_FIELD(s, T); 1165 1166 return trace_handle_return(s); 1167 } 1168 1169 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, 1170 struct trace_event *event) 1171 { 1172 return trace_ctxwake_hex(iter, 0); 1173 } 1174 1175 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, 1176 struct trace_event *event) 1177 { 1178 return trace_ctxwake_hex(iter, '+'); 1179 } 1180 1181 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, 1182 int flags, struct trace_event *event) 1183 { 1184 struct ctx_switch_entry *field; 1185 struct trace_seq *s = &iter->seq; 1186 1187 trace_assign_type(field, iter->ent); 1188 1189 SEQ_PUT_FIELD(s, field->prev_pid); 1190 SEQ_PUT_FIELD(s, field->prev_prio); 1191 SEQ_PUT_FIELD(s, field->prev_state); 1192 SEQ_PUT_FIELD(s, field->next_cpu); 1193 SEQ_PUT_FIELD(s, field->next_pid); 1194 SEQ_PUT_FIELD(s, field->next_prio); 1195 SEQ_PUT_FIELD(s, field->next_state); 1196 1197 return trace_handle_return(s); 1198 } 1199 1200 static struct trace_event_functions trace_ctx_funcs = { 1201 .trace = trace_ctx_print, 1202 .raw = trace_ctx_raw, 1203 .hex = trace_ctx_hex, 1204 .binary = trace_ctxwake_bin, 1205 }; 1206 1207 static struct trace_event trace_ctx_event = { 1208 .type = TRACE_CTX, 1209 .funcs = &trace_ctx_funcs, 1210 }; 1211 1212 static struct trace_event_functions trace_wake_funcs = { 1213 .trace = trace_wake_print, 1214 .raw = trace_wake_raw, 1215 .hex = trace_wake_hex, 1216 .binary = trace_ctxwake_bin, 1217 }; 1218 1219 static struct trace_event trace_wake_event = { 1220 .type = TRACE_WAKE, 1221 .funcs = &trace_wake_funcs, 1222 }; 1223 1224 /* TRACE_STACK */ 1225 1226 static enum print_line_t trace_stack_print(struct trace_iterator *iter, 1227 int flags, struct trace_event *event) 1228 { 1229 struct stack_entry *field; 1230 struct trace_seq *s = &iter->seq; 1231 unsigned long *p; 1232 unsigned long *end; 1233 1234 trace_assign_type(field, iter->ent); 1235 end = (unsigned long *)((long)iter->ent + iter->ent_size); 1236 1237 trace_seq_puts(s, "<stack trace>\n"); 1238 1239 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) { 1240 1241 if (trace_seq_has_overflowed(s)) 1242 break; 1243 1244 trace_seq_puts(s, " => "); 1245 seq_print_ip_sym(s, *p, flags); 1246 trace_seq_putc(s, '\n'); 1247 } 1248 1249 return trace_handle_return(s); 1250 } 1251 1252 static struct trace_event_functions trace_stack_funcs = { 1253 .trace = trace_stack_print, 1254 }; 1255 1256 static struct trace_event trace_stack_event = { 1257 .type = TRACE_STACK, 1258 .funcs = &trace_stack_funcs, 1259 }; 1260 1261 /* TRACE_USER_STACK */ 1262 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, 1263 int flags, struct trace_event *event) 1264 { 1265 struct trace_array *tr = iter->tr; 1266 struct userstack_entry *field; 1267 struct trace_seq *s = &iter->seq; 1268 struct mm_struct *mm = NULL; 1269 unsigned int i; 1270 1271 trace_assign_type(field, iter->ent); 1272 1273 trace_seq_puts(s, "<user stack trace>\n"); 1274 1275 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { 1276 struct task_struct *task; 1277 /* 1278 * we do the lookup on the thread group leader, 1279 * since individual threads might have already quit! 1280 */ 1281 rcu_read_lock(); 1282 task = find_task_by_vpid(field->tgid); 1283 if (task) 1284 mm = get_task_mm(task); 1285 rcu_read_unlock(); 1286 } 1287 1288 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { 1289 unsigned long ip = field->caller[i]; 1290 1291 if (!ip || trace_seq_has_overflowed(s)) 1292 break; 1293 1294 trace_seq_puts(s, " => "); 1295 seq_print_user_ip(s, mm, ip, flags); 1296 trace_seq_putc(s, '\n'); 1297 } 1298 1299 if (mm) 1300 mmput(mm); 1301 1302 return trace_handle_return(s); 1303 } 1304 1305 static struct trace_event_functions trace_user_stack_funcs = { 1306 .trace = trace_user_stack_print, 1307 }; 1308 1309 static struct trace_event trace_user_stack_event = { 1310 .type = TRACE_USER_STACK, 1311 .funcs = &trace_user_stack_funcs, 1312 }; 1313 1314 /* TRACE_HWLAT */ 1315 static enum print_line_t 1316 trace_hwlat_print(struct trace_iterator *iter, int flags, 1317 struct trace_event *event) 1318 { 1319 struct trace_entry *entry = iter->ent; 1320 struct trace_seq *s = &iter->seq; 1321 struct hwlat_entry *field; 1322 1323 trace_assign_type(field, entry); 1324 1325 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d", 1326 field->seqnum, 1327 field->duration, 1328 field->outer_duration, 1329 (long long)field->timestamp.tv_sec, 1330 field->timestamp.tv_nsec, field->count); 1331 1332 if (field->nmi_count) { 1333 /* 1334 * The generic sched_clock() is not NMI safe, thus 1335 * we only record the count and not the time. 1336 */ 1337 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) 1338 trace_seq_printf(s, " nmi-total:%llu", 1339 field->nmi_total_ts); 1340 trace_seq_printf(s, " nmi-count:%u", 1341 field->nmi_count); 1342 } 1343 1344 trace_seq_putc(s, '\n'); 1345 1346 return trace_handle_return(s); 1347 } 1348 1349 static enum print_line_t 1350 trace_hwlat_raw(struct trace_iterator *iter, int flags, 1351 struct trace_event *event) 1352 { 1353 struct hwlat_entry *field; 1354 struct trace_seq *s = &iter->seq; 1355 1356 trace_assign_type(field, iter->ent); 1357 1358 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", 1359 field->duration, 1360 field->outer_duration, 1361 (long long)field->timestamp.tv_sec, 1362 field->timestamp.tv_nsec, 1363 field->seqnum); 1364 1365 return trace_handle_return(s); 1366 } 1367 1368 static struct trace_event_functions trace_hwlat_funcs = { 1369 .trace = trace_hwlat_print, 1370 .raw = trace_hwlat_raw, 1371 }; 1372 1373 static struct trace_event trace_hwlat_event = { 1374 .type = TRACE_HWLAT, 1375 .funcs = &trace_hwlat_funcs, 1376 }; 1377 1378 /* TRACE_OSNOISE */ 1379 static enum print_line_t 1380 trace_osnoise_print(struct trace_iterator *iter, int flags, 1381 struct trace_event *event) 1382 { 1383 struct trace_entry *entry = iter->ent; 1384 struct trace_seq *s = &iter->seq; 1385 struct osnoise_entry *field; 1386 u64 ratio, ratio_dec; 1387 u64 net_runtime; 1388 1389 trace_assign_type(field, entry); 1390 1391 /* 1392 * compute the available % of cpu time. 1393 */ 1394 net_runtime = field->runtime - field->noise; 1395 ratio = net_runtime * 10000000; 1396 do_div(ratio, field->runtime); 1397 ratio_dec = do_div(ratio, 100000); 1398 1399 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu", 1400 field->runtime, 1401 field->noise, 1402 ratio, ratio_dec, 1403 field->max_sample); 1404 1405 trace_seq_printf(s, " %6u", field->hw_count); 1406 trace_seq_printf(s, " %6u", field->nmi_count); 1407 trace_seq_printf(s, " %6u", field->irq_count); 1408 trace_seq_printf(s, " %6u", field->softirq_count); 1409 trace_seq_printf(s, " %6u", field->thread_count); 1410 1411 trace_seq_putc(s, '\n'); 1412 1413 return trace_handle_return(s); 1414 } 1415 1416 static enum print_line_t 1417 trace_osnoise_raw(struct trace_iterator *iter, int flags, 1418 struct trace_event *event) 1419 { 1420 struct osnoise_entry *field; 1421 struct trace_seq *s = &iter->seq; 1422 1423 trace_assign_type(field, iter->ent); 1424 1425 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n", 1426 field->runtime, 1427 field->noise, 1428 field->max_sample, 1429 field->hw_count, 1430 field->nmi_count, 1431 field->irq_count, 1432 field->softirq_count, 1433 field->thread_count); 1434 1435 return trace_handle_return(s); 1436 } 1437 1438 static struct trace_event_functions trace_osnoise_funcs = { 1439 .trace = trace_osnoise_print, 1440 .raw = trace_osnoise_raw, 1441 }; 1442 1443 static struct trace_event trace_osnoise_event = { 1444 .type = TRACE_OSNOISE, 1445 .funcs = &trace_osnoise_funcs, 1446 }; 1447 1448 /* TRACE_TIMERLAT */ 1449 1450 static char *timerlat_lat_context[] = {"irq", "thread", "user-ret"}; 1451 static enum print_line_t 1452 trace_timerlat_print(struct trace_iterator *iter, int flags, 1453 struct trace_event *event) 1454 { 1455 struct trace_entry *entry = iter->ent; 1456 struct trace_seq *s = &iter->seq; 1457 struct timerlat_entry *field; 1458 1459 trace_assign_type(field, entry); 1460 1461 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n", 1462 field->seqnum, 1463 timerlat_lat_context[field->context], 1464 field->timer_latency); 1465 1466 return trace_handle_return(s); 1467 } 1468 1469 static enum print_line_t 1470 trace_timerlat_raw(struct trace_iterator *iter, int flags, 1471 struct trace_event *event) 1472 { 1473 struct timerlat_entry *field; 1474 struct trace_seq *s = &iter->seq; 1475 1476 trace_assign_type(field, iter->ent); 1477 1478 trace_seq_printf(s, "%u %d %llu\n", 1479 field->seqnum, 1480 field->context, 1481 field->timer_latency); 1482 1483 return trace_handle_return(s); 1484 } 1485 1486 static struct trace_event_functions trace_timerlat_funcs = { 1487 .trace = trace_timerlat_print, 1488 .raw = trace_timerlat_raw, 1489 }; 1490 1491 static struct trace_event trace_timerlat_event = { 1492 .type = TRACE_TIMERLAT, 1493 .funcs = &trace_timerlat_funcs, 1494 }; 1495 1496 /* TRACE_BPUTS */ 1497 static enum print_line_t 1498 trace_bputs_print(struct trace_iterator *iter, int flags, 1499 struct trace_event *event) 1500 { 1501 struct trace_entry *entry = iter->ent; 1502 struct trace_seq *s = &iter->seq; 1503 struct bputs_entry *field; 1504 1505 trace_assign_type(field, entry); 1506 1507 seq_print_ip_sym(s, field->ip, flags); 1508 trace_seq_puts(s, ": "); 1509 trace_seq_puts(s, field->str); 1510 1511 return trace_handle_return(s); 1512 } 1513 1514 1515 static enum print_line_t 1516 trace_bputs_raw(struct trace_iterator *iter, int flags, 1517 struct trace_event *event) 1518 { 1519 struct bputs_entry *field; 1520 struct trace_seq *s = &iter->seq; 1521 1522 trace_assign_type(field, iter->ent); 1523 1524 trace_seq_printf(s, ": %lx : ", field->ip); 1525 trace_seq_puts(s, field->str); 1526 1527 return trace_handle_return(s); 1528 } 1529 1530 static struct trace_event_functions trace_bputs_funcs = { 1531 .trace = trace_bputs_print, 1532 .raw = trace_bputs_raw, 1533 }; 1534 1535 static struct trace_event trace_bputs_event = { 1536 .type = TRACE_BPUTS, 1537 .funcs = &trace_bputs_funcs, 1538 }; 1539 1540 /* TRACE_BPRINT */ 1541 static enum print_line_t 1542 trace_bprint_print(struct trace_iterator *iter, int flags, 1543 struct trace_event *event) 1544 { 1545 struct trace_entry *entry = iter->ent; 1546 struct trace_seq *s = &iter->seq; 1547 struct bprint_entry *field; 1548 1549 trace_assign_type(field, entry); 1550 1551 seq_print_ip_sym(s, field->ip, flags); 1552 trace_seq_puts(s, ": "); 1553 trace_seq_bprintf(s, field->fmt, field->buf); 1554 1555 return trace_handle_return(s); 1556 } 1557 1558 1559 static enum print_line_t 1560 trace_bprint_raw(struct trace_iterator *iter, int flags, 1561 struct trace_event *event) 1562 { 1563 struct bprint_entry *field; 1564 struct trace_seq *s = &iter->seq; 1565 1566 trace_assign_type(field, iter->ent); 1567 1568 trace_seq_printf(s, ": %lx : ", field->ip); 1569 trace_seq_bprintf(s, field->fmt, field->buf); 1570 1571 return trace_handle_return(s); 1572 } 1573 1574 static struct trace_event_functions trace_bprint_funcs = { 1575 .trace = trace_bprint_print, 1576 .raw = trace_bprint_raw, 1577 }; 1578 1579 static struct trace_event trace_bprint_event = { 1580 .type = TRACE_BPRINT, 1581 .funcs = &trace_bprint_funcs, 1582 }; 1583 1584 /* TRACE_PRINT */ 1585 static enum print_line_t trace_print_print(struct trace_iterator *iter, 1586 int flags, struct trace_event *event) 1587 { 1588 struct print_entry *field; 1589 struct trace_seq *s = &iter->seq; 1590 int max = iter->ent_size - offsetof(struct print_entry, buf); 1591 1592 trace_assign_type(field, iter->ent); 1593 1594 seq_print_ip_sym(s, field->ip, flags); 1595 trace_seq_printf(s, ": %.*s", max, field->buf); 1596 1597 return trace_handle_return(s); 1598 } 1599 1600 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, 1601 struct trace_event *event) 1602 { 1603 struct print_entry *field; 1604 int max = iter->ent_size - offsetof(struct print_entry, buf); 1605 1606 trace_assign_type(field, iter->ent); 1607 1608 trace_seq_printf(&iter->seq, "# %lx %.*s", field->ip, max, field->buf); 1609 1610 return trace_handle_return(&iter->seq); 1611 } 1612 1613 static struct trace_event_functions trace_print_funcs = { 1614 .trace = trace_print_print, 1615 .raw = trace_print_raw, 1616 }; 1617 1618 static struct trace_event trace_print_event = { 1619 .type = TRACE_PRINT, 1620 .funcs = &trace_print_funcs, 1621 }; 1622 1623 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, 1624 struct trace_event *event) 1625 { 1626 struct raw_data_entry *field; 1627 int i; 1628 1629 trace_assign_type(field, iter->ent); 1630 1631 trace_seq_printf(&iter->seq, "# %x buf:", field->id); 1632 1633 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) 1634 trace_seq_printf(&iter->seq, " %02x", 1635 (unsigned char)field->buf[i]); 1636 1637 trace_seq_putc(&iter->seq, '\n'); 1638 1639 return trace_handle_return(&iter->seq); 1640 } 1641 1642 static struct trace_event_functions trace_raw_data_funcs = { 1643 .trace = trace_raw_data, 1644 .raw = trace_raw_data, 1645 }; 1646 1647 static struct trace_event trace_raw_data_event = { 1648 .type = TRACE_RAW_DATA, 1649 .funcs = &trace_raw_data_funcs, 1650 }; 1651 1652 static enum print_line_t 1653 trace_func_repeats_raw(struct trace_iterator *iter, int flags, 1654 struct trace_event *event) 1655 { 1656 struct func_repeats_entry *field; 1657 struct trace_seq *s = &iter->seq; 1658 1659 trace_assign_type(field, iter->ent); 1660 1661 trace_seq_printf(s, "%lu %lu %u %llu\n", 1662 field->ip, 1663 field->parent_ip, 1664 field->count, 1665 FUNC_REPEATS_GET_DELTA_TS(field)); 1666 1667 return trace_handle_return(s); 1668 } 1669 1670 static enum print_line_t 1671 trace_func_repeats_print(struct trace_iterator *iter, int flags, 1672 struct trace_event *event) 1673 { 1674 struct func_repeats_entry *field; 1675 struct trace_seq *s = &iter->seq; 1676 1677 trace_assign_type(field, iter->ent); 1678 1679 print_fn_trace(s, field->ip, field->parent_ip, flags); 1680 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count); 1681 trace_print_time(s, iter, 1682 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field)); 1683 trace_seq_puts(s, ")\n"); 1684 1685 return trace_handle_return(s); 1686 } 1687 1688 static struct trace_event_functions trace_func_repeats_funcs = { 1689 .trace = trace_func_repeats_print, 1690 .raw = trace_func_repeats_raw, 1691 }; 1692 1693 static struct trace_event trace_func_repeats_event = { 1694 .type = TRACE_FUNC_REPEATS, 1695 .funcs = &trace_func_repeats_funcs, 1696 }; 1697 1698 static struct trace_event *events[] __initdata = { 1699 &trace_fn_event, 1700 &trace_ctx_event, 1701 &trace_wake_event, 1702 &trace_stack_event, 1703 &trace_user_stack_event, 1704 &trace_bputs_event, 1705 &trace_bprint_event, 1706 &trace_print_event, 1707 &trace_hwlat_event, 1708 &trace_osnoise_event, 1709 &trace_timerlat_event, 1710 &trace_raw_data_event, 1711 &trace_func_repeats_event, 1712 NULL 1713 }; 1714 1715 __init int init_events(void) 1716 { 1717 struct trace_event *event; 1718 int i, ret; 1719 1720 for (i = 0; events[i]; i++) { 1721 event = events[i]; 1722 ret = register_trace_event(event); 1723 WARN_ONCE(!ret, "event %d failed to register", event->type); 1724 } 1725 1726 return 0; 1727 } 1728