git.oblomov.eu Git - linux-2.6/blob - kernel/trace/trace_output.c

   1 /*
   2  * trace_output.c
   3  *
   4  * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   5  *
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/mutex.h>
  10 #include <linux/ftrace.h>
  11
  12 #include "trace_output.h"
  13
  14 /* must be a power of 2 */
  15 #define EVENT_HASHSIZE  128
  16
  17 static DEFINE_MUTEX(trace_event_mutex);
  18 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
  19
  20 static int next_event_type = __TRACE_LAST_TYPE + 1;
  21
  22 /**
  23  * trace_seq_printf - sequence printing of trace information
  24  * @s: trace sequence descriptor
  25  * @fmt: printf format string
  26  *
  27  * The tracer may use either sequence operations or its own
  28  * copy to user routines. To simplify formating of a trace
  29  * trace_seq_printf is used to store strings into a special
  30  * buffer (@s). Then the output may be either used by
  31  * the sequencer or pulled into another buffer.
  32  */
  33 int
  34 trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
  35 {
  36         int len = (PAGE_SIZE - 1) - s->len;
  37         va_list ap;
  38         int ret;
  39
  40         if (!len)
  41                 return 0;
  42
  43         va_start(ap, fmt);
  44         ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
  45         va_end(ap);
  46
  47         /* If we can't write it all, don't bother writing anything */
  48         if (ret >= len)
  49                 return 0;
  50
  51         s->len += ret;
  52
  53         return len;
  54 }
  55
  56 /**
  57  * trace_seq_puts - trace sequence printing of simple string
  58  * @s: trace sequence descriptor
  59  * @str: simple string to record
  60  *
  61  * The tracer may use either the sequence operations or its own
  62  * copy to user routines. This function records a simple string
  63  * into a special buffer (@s) for later retrieval by a sequencer
  64  * or other mechanism.
  65  */
  66 int trace_seq_puts(struct trace_seq *s, const char *str)
  67 {
  68         int len = strlen(str);
  69
  70         if (len > ((PAGE_SIZE - 1) - s->len))
  71                 return 0;
  72
  73         memcpy(s->buffer + s->len, str, len);
  74         s->len += len;
  75
  76         return len;
  77 }
  78
  79 int trace_seq_putc(struct trace_seq *s, unsigned char c)
  80 {
  81         if (s->len >= (PAGE_SIZE - 1))
  82                 return 0;
  83
  84         s->buffer[s->len++] = c;
  85
  86         return 1;
  87 }
  88
  89 int trace_seq_putmem(struct trace_seq *s, void *mem, size_t len)
  90 {
  91         if (len > ((PAGE_SIZE - 1) - s->len))
  92                 return 0;
  93
  94         memcpy(s->buffer + s->len, mem, len);
  95         s->len += len;
  96
  97         return len;
  98 }
  99
 100 int trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len)
 101 {
 102         unsigned char hex[HEX_CHARS];
 103         unsigned char *data = mem;
 104         int i, j;
 105
 106 #ifdef __BIG_ENDIAN
 107         for (i = 0, j = 0; i < len; i++) {
 108 #else
 109         for (i = len-1, j = 0; i >= 0; i--) {
 110 #endif
 111                 hex[j++] = hex_asc_hi(data[i]);
 112                 hex[j++] = hex_asc_lo(data[i]);
 113         }
 114         hex[j++] = ' ';
 115
 116         return trace_seq_putmem(s, hex, j);
 117 }
 118
 119 int trace_seq_path(struct trace_seq *s, struct path *path)
 120 {
 121         unsigned char *p;
 122
 123         if (s->len >= (PAGE_SIZE - 1))
 124                 return 0;
 125         p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
 126         if (!IS_ERR(p)) {
 127                 p = mangle_path(s->buffer + s->len, p, "\n");
 128                 if (p) {
 129                         s->len = p - s->buffer;
 130                         return 1;
 131                 }
 132         } else {
 133                 s->buffer[s->len++] = '?';
 134                 return 1;
 135         }
 136
 137         return 0;
 138 }
 139
 140 #ifdef CONFIG_KRETPROBES
 141 static inline const char *kretprobed(const char *name)
 142 {
 143         static const char tramp_name[] = "kretprobe_trampoline";
 144         int size = sizeof(tramp_name);
 145
 146         if (strncmp(tramp_name, name, size) == 0)
 147                 return "[unknown/kretprobe'd]";
 148         return name;
 149 }
 150 #else
 151 static inline const char *kretprobed(const char *name)
 152 {
 153         return name;
 154 }
 155 #endif /* CONFIG_KRETPROBES */
 156
 157 static int
 158 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
 159 {
 160 #ifdef CONFIG_KALLSYMS
 161         char str[KSYM_SYMBOL_LEN];
 162         const char *name;
 163
 164         kallsyms_lookup(address, NULL, NULL, NULL, str);
 165
 166         name = kretprobed(str);
 167
 168         return trace_seq_printf(s, fmt, name);
 169 #endif
 170         return 1;
 171 }
 172
 173 static int
 174 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
 175                      unsigned long address)
 176 {
 177 #ifdef CONFIG_KALLSYMS
 178         char str[KSYM_SYMBOL_LEN];
 179         const char *name;
 180
 181         sprint_symbol(str, address);
 182         name = kretprobed(str);
 183
 184         return trace_seq_printf(s, fmt, name);
 185 #endif
 186         return 1;
 187 }
 188
 189 #ifndef CONFIG_64BIT
 190 # define IP_FMT "%08lx"
 191 #else
 192 # define IP_FMT "%016lx"
 193 #endif
 194
 195 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
 196                       unsigned long ip, unsigned long sym_flags)
 197 {
 198         struct file *file = NULL;
 199         unsigned long vmstart = 0;
 200         int ret = 1;
 201
 202         if (mm) {
 203                 const struct vm_area_struct *vma;
 204
 205                 down_read(&mm->mmap_sem);
 206                 vma = find_vma(mm, ip);
 207                 if (vma) {
 208                         file = vma->vm_file;
 209                         vmstart = vma->vm_start;
 210                 }
 211                 if (file) {
 212                         ret = trace_seq_path(s, &file->f_path);
 213                         if (ret)
 214                                 ret = trace_seq_printf(s, "[+0x%lx]",
 215                                                        ip - vmstart);
 216                 }
 217                 up_read(&mm->mmap_sem);
 218         }
 219         if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
 220                 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
 221         return ret;
 222 }
 223
 224 int
 225 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
 226                       unsigned long sym_flags)
 227 {
 228         struct mm_struct *mm = NULL;
 229         int ret = 1;
 230         unsigned int i;
 231
 232         if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
 233                 struct task_struct *task;
 234                 /*
 235                  * we do the lookup on the thread group leader,
 236                  * since individual threads might have already quit!
 237                  */
 238                 rcu_read_lock();
 239                 task = find_task_by_vpid(entry->ent.tgid);
 240                 if (task)
 241                         mm = get_task_mm(task);
 242                 rcu_read_unlock();
 243         }
 244
 245         for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 246                 unsigned long ip = entry->caller[i];
 247
 248                 if (ip == ULONG_MAX || !ret)
 249                         break;
 250                 if (i && ret)
 251                         ret = trace_seq_puts(s, " <- ");
 252                 if (!ip) {
 253                         if (ret)
 254                                 ret = trace_seq_puts(s, "??");
 255                         continue;
 256                 }
 257                 if (!ret)
 258                         break;
 259                 if (ret)
 260                         ret = seq_print_user_ip(s, mm, ip, sym_flags);
 261         }
 262
 263         if (mm)
 264                 mmput(mm);
 265         return ret;
 266 }
 267
 268 int
 269 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
 270 {
 271         int ret;
 272
 273         if (!ip)
 274                 return trace_seq_printf(s, "0");
 275
 276         if (sym_flags & TRACE_ITER_SYM_OFFSET)
 277                 ret = seq_print_sym_offset(s, "%s", ip);
 278         else
 279                 ret = seq_print_sym_short(s, "%s", ip);
 280
 281         if (!ret)
 282                 return 0;
 283
 284         if (sym_flags & TRACE_ITER_SYM_ADDR)
 285                 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
 286         return ret;
 287 }
 288
 289 static void
 290 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 291 {
 292         int hardirq, softirq;
 293         char *comm;
 294
 295         comm = trace_find_cmdline(entry->pid);
 296
 297         trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
 298         trace_seq_printf(s, "%3d", cpu);
 299         trace_seq_printf(s, "%c%c",
 300                         (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
 301                          (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : '.',
 302                         ((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
 303
 304         hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
 305         softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
 306         if (hardirq && softirq) {
 307                 trace_seq_putc(s, 'H');
 308         } else {
 309                 if (hardirq) {
 310                         trace_seq_putc(s, 'h');
 311                 } else {
 312                         if (softirq)
 313                                 trace_seq_putc(s, 's');
 314                         else
 315                                 trace_seq_putc(s, '.');
 316                 }
 317         }
 318
 319         if (entry->preempt_count)
 320                 trace_seq_printf(s, "%x", entry->preempt_count);
 321         else
 322                 trace_seq_puts(s, ".");
 323 }
 324
 325 static unsigned long preempt_mark_thresh = 100;
 326
 327 static void
 328 lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
 329                     unsigned long rel_usecs)
 330 {
 331         trace_seq_printf(s, " %4lldus", abs_usecs);
 332         if (rel_usecs > preempt_mark_thresh)
 333                 trace_seq_puts(s, "!: ");
 334         else if (rel_usecs > 1)
 335                 trace_seq_puts(s, "+: ");
 336         else
 337                 trace_seq_puts(s, " : ");
 338 }
 339
 340 int trace_print_context(struct trace_iterator *iter)
 341 {
 342         struct trace_seq *s = &iter->seq;
 343         struct trace_entry *entry = iter->ent;
 344         char *comm = trace_find_cmdline(entry->pid);
 345         unsigned long long t = ns2usecs(iter->ts);
 346         unsigned long usec_rem = do_div(t, USEC_PER_SEC);
 347         unsigned long secs = (unsigned long)t;
 348
 349         if (!trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid))
 350                 goto partial;
 351         if (!trace_seq_printf(s, "[%03d] ", entry->cpu))
 352                 goto partial;
 353         if (!trace_seq_printf(s, "%5lu.%06lu: ", secs, usec_rem))
 354                 goto partial;
 355
 356         return 0;
 357
 358 partial:
 359         return TRACE_TYPE_PARTIAL_LINE;
 360 }
 361
 362 int trace_print_lat_context(struct trace_iterator *iter)
 363 {
 364         u64 next_ts;
 365         struct trace_seq *s = &iter->seq;
 366         struct trace_entry *entry = iter->ent,
 367                            *next_entry = trace_find_next_entry(iter, NULL,
 368                                                                &next_ts);
 369         unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
 370         unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
 371         unsigned long rel_usecs;
 372
 373         if (!next_entry)
 374                 next_ts = iter->ts;
 375         rel_usecs = ns2usecs(next_ts - iter->ts);
 376
 377         if (verbose) {
 378                 char *comm = trace_find_cmdline(entry->pid);
 379                 trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]"
 380                                  " %ld.%03ldms (+%ld.%03ldms): ",
 381                                  comm,
 382                                  entry->pid, entry->cpu, entry->flags,
 383                                  entry->preempt_count, iter->idx,
 384                                  ns2usecs(iter->ts),
 385                                  abs_usecs/1000,
 386                                  abs_usecs % 1000, rel_usecs/1000,
 387                                  rel_usecs % 1000);
 388         } else {
 389                 lat_print_generic(s, entry, entry->cpu);
 390                 lat_print_timestamp(s, abs_usecs, rel_usecs);
 391         }
 392
 393         return 0;
 394 }
 395
 396 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
 397
 398 static int task_state_char(unsigned long state)
 399 {
 400         int bit = state ? __ffs(state) + 1 : 0;
 401
 402         return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
 403 }
 404
 405 /**
 406  * ftrace_find_event - find a registered event
 407  * @type: the type of event to look for
 408  *
 409  * Returns an event of type @type otherwise NULL
 410  */
 411 struct trace_event *ftrace_find_event(int type)
 412 {
 413         struct trace_event *event;
 414         struct hlist_node *n;
 415         unsigned key;
 416
 417         key = type & (EVENT_HASHSIZE - 1);
 418
 419         hlist_for_each_entry_rcu(event, n, &event_hash[key], node) {
 420                 if (event->type == type)
 421                         return event;
 422         }
 423
 424         return NULL;
 425 }
 426
 427 /**
 428  * register_ftrace_event - register output for an event type
 429  * @event: the event type to register
 430  *
 431  * Event types are stored in a hash and this hash is used to
 432  * find a way to print an event. If the @event->type is set
 433  * then it will use that type, otherwise it will assign a
 434  * type to use.
 435  *
 436  * If you assign your own type, please make sure it is added
 437  * to the trace_type enum in trace.h, to avoid collisions
 438  * with the dynamic types.
 439  *
 440  * Returns the event type number or zero on error.
 441  */
 442 int register_ftrace_event(struct trace_event *event)
 443 {
 444         unsigned key;
 445         int ret = 0;
 446
 447         mutex_lock(&trace_event_mutex);
 448
 449         if (!event->type)
 450                 event->type = next_event_type++;
 451         else if (event->type > __TRACE_LAST_TYPE) {
 452                 printk(KERN_WARNING "Need to add type to trace.h\n");
 453                 WARN_ON(1);
 454         }
 455
 456         if (ftrace_find_event(event->type))
 457                 goto out;
 458
 459         key = event->type & (EVENT_HASHSIZE - 1);
 460
 461         hlist_add_head_rcu(&event->node, &event_hash[key]);
 462
 463         ret = event->type;
 464  out:
 465         mutex_unlock(&trace_event_mutex);
 466
 467         return ret;
 468 }
 469
 470 /**
 471  * unregister_ftrace_event - remove a no longer used event
 472  * @event: the event to remove
 473  */
 474 int unregister_ftrace_event(struct trace_event *event)
 475 {
 476         mutex_lock(&trace_event_mutex);
 477         hlist_del(&event->node);
 478         mutex_unlock(&trace_event_mutex);
 479
 480         return 0;
 481 }
 482
 483 /*
 484  * Standard events
 485  */
 486
 487 int
 488 trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 489 {
 490         return 0;
 491 }
 492
 493 /* TRACE_FN */
 494 static int
 495 trace_fn_latency(struct trace_seq *s, struct trace_entry *entry, int flags)
 496 {
 497         struct ftrace_entry *field;
 498
 499         trace_assign_type(field, entry);
 500
 501         if (!seq_print_ip_sym(s, field->ip, flags))
 502                 goto partial;
 503         if (!trace_seq_puts(s, " ("))
 504                 goto partial;
 505         if (!seq_print_ip_sym(s, field->parent_ip, flags))
 506                 goto partial;
 507         if (!trace_seq_puts(s, ")\n"))
 508                 goto partial;
 509
 510         return 0;
 511
 512  partial:
 513         return TRACE_TYPE_PARTIAL_LINE;
 514 }
 515
 516 static int
 517 trace_fn_trace(struct trace_seq *s, struct trace_entry *entry, int flags)
 518 {
 519         struct ftrace_entry *field;
 520
 521         trace_assign_type(field, entry);
 522
 523         if (!seq_print_ip_sym(s, field->ip, flags))
 524                 goto partial;
 525
 526         if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
 527                 if (!trace_seq_printf(s, " <-"))
 528                         goto partial;
 529                 if (!seq_print_ip_sym(s,
 530                                       field->parent_ip,
 531                                       flags))
 532                         goto partial;
 533         }
 534         if (!trace_seq_printf(s, "\n"))
 535                 goto partial;
 536
 537         return 0;
 538
 539  partial:
 540         return TRACE_TYPE_PARTIAL_LINE;
 541 }
 542
 543 static int
 544 trace_fn_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
 545 {
 546         struct ftrace_entry *field;
 547
 548         trace_assign_type(field, entry);
 549
 550         if (!trace_seq_printf(s, "%lx %lx\n",
 551                               field->ip,
 552                               field->parent_ip))
 553                 return TRACE_TYPE_PARTIAL_LINE;
 554
 555         return 0;
 556 }
 557
 558 static int
 559 trace_fn_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
 560 {
 561         struct ftrace_entry *field;
 562
 563         trace_assign_type(field, entry);
 564
 565         SEQ_PUT_HEX_FIELD_RET(s, field->ip);
 566         SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
 567
 568         return 0;
 569 }
 570
 571 static int
 572 trace_fn_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
 573 {
 574         struct ftrace_entry *field;
 575
 576         trace_assign_type(field, entry);
 577
 578         SEQ_PUT_FIELD_RET(s, field->ip);
 579         SEQ_PUT_FIELD_RET(s, field->parent_ip);
 580
 581         return 0;
 582 }
 583
 584 static struct trace_event trace_fn_event = {
 585         .type           = TRACE_FN,
 586         .trace          = trace_fn_trace,
 587         .latency_trace  = trace_fn_latency,
 588         .raw            = trace_fn_raw,
 589         .hex            = trace_fn_hex,
 590         .binary         = trace_fn_bin,
 591 };
 592
 593 /* TRACE_CTX an TRACE_WAKE */
 594 static int
 595 trace_ctxwake_print(struct trace_seq *s, struct trace_entry *entry, int flags,
 596                     char *delim)
 597 {
 598         struct ctx_switch_entry *field;
 599         char *comm;
 600         int S, T;
 601
 602         trace_assign_type(field, entry);
 603
 604         T = task_state_char(field->next_state);
 605         S = task_state_char(field->prev_state);
 606         comm = trace_find_cmdline(field->next_pid);
 607         if (!trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
 608                               field->prev_pid,
 609                               field->prev_prio,
 610                               S, delim,
 611                               field->next_cpu,
 612                               field->next_pid,
 613                               field->next_prio,
 614                               T, comm))
 615                 return TRACE_TYPE_PARTIAL_LINE;
 616
 617         return 0;
 618 }
 619
 620 static int
 621 trace_ctx_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 622 {
 623         return trace_ctxwake_print(s, entry, flags, "==>");
 624 }
 625
 626 static int
 627 trace_wake_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 628 {
 629         return trace_ctxwake_print(s, entry, flags, "  +");
 630 }
 631
 632 static int
 633 trace_ctxwake_raw(struct trace_seq *s, struct trace_entry *entry, int flags,
 634                   char S)
 635 {
 636         struct ctx_switch_entry *field;
 637         int T;
 638
 639         trace_assign_type(field, entry);
 640
 641         if (!S)
 642                 task_state_char(field->prev_state);
 643         T = task_state_char(field->next_state);
 644         if (!trace_seq_printf(s, "%d %d %c %d %d %d %c\n",
 645                               field->prev_pid,
 646                               field->prev_prio,
 647                               S,
 648                               field->next_cpu,
 649                               field->next_pid,
 650                               field->next_prio,
 651                               T))
 652                 return TRACE_TYPE_PARTIAL_LINE;
 653
 654         return 0;
 655 }
 656
 657 static int
 658 trace_ctx_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
 659 {
 660         return trace_ctxwake_raw(s, entry, flags, 0);
 661 }
 662
 663 static int
 664 trace_wake_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
 665 {
 666         return trace_ctxwake_raw(s, entry, flags, '+');
 667 }
 668
 669
 670 static int
 671 trace_ctxwake_hex(struct trace_seq *s, struct trace_entry *entry, int flags,
 672                   char S)
 673 {
 674         struct ctx_switch_entry *field;
 675         int T;
 676
 677         trace_assign_type(field, entry);
 678
 679         if (!S)
 680                 task_state_char(field->prev_state);
 681         T = task_state_char(field->next_state);
 682
 683         SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
 684         SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
 685         SEQ_PUT_HEX_FIELD_RET(s, S);
 686         SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
 687         SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
 688         SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
 689         SEQ_PUT_HEX_FIELD_RET(s, T);
 690
 691         return 0;
 692 }
 693
 694 static int
 695 trace_ctx_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
 696 {
 697         return trace_ctxwake_hex(s, entry, flags, 0);
 698 }
 699
 700 static int
 701 trace_wake_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
 702 {
 703         return trace_ctxwake_hex(s, entry, flags, '+');
 704 }
 705
 706 static int
 707 trace_ctxwake_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
 708 {
 709         struct ctx_switch_entry *field;
 710
 711         trace_assign_type(field, entry);
 712
 713         SEQ_PUT_FIELD_RET(s, field->prev_pid);
 714         SEQ_PUT_FIELD_RET(s, field->prev_prio);
 715         SEQ_PUT_FIELD_RET(s, field->prev_state);
 716         SEQ_PUT_FIELD_RET(s, field->next_pid);
 717         SEQ_PUT_FIELD_RET(s, field->next_prio);
 718         SEQ_PUT_FIELD_RET(s, field->next_state);
 719
 720         return 0;
 721 }
 722
 723 static struct trace_event trace_ctx_event = {
 724         .type           = TRACE_CTX,
 725         .trace          = trace_ctx_print,
 726         .latency_trace  = trace_ctx_print,
 727         .raw            = trace_ctx_raw,
 728         .hex            = trace_ctx_hex,
 729         .binary         = trace_ctxwake_bin,
 730 };
 731
 732 static struct trace_event trace_wake_event = {
 733         .type           = TRACE_WAKE,
 734         .trace          = trace_wake_print,
 735         .latency_trace  = trace_wake_print,
 736         .raw            = trace_wake_raw,
 737         .hex            = trace_wake_hex,
 738         .binary         = trace_ctxwake_bin,
 739 };
 740
 741 /* TRACE_SPECIAL */
 742 static int
 743 trace_special_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 744 {
 745         struct special_entry *field;
 746
 747         trace_assign_type(field, entry);
 748
 749         if (!trace_seq_printf(s, "# %ld %ld %ld\n",
 750                               field->arg1,
 751                               field->arg2,
 752                               field->arg3))
 753                 return TRACE_TYPE_PARTIAL_LINE;
 754
 755         return 0;
 756 }
 757
 758 static int
 759 trace_special_hex(struct trace_seq *s, struct trace_entry *entry, int flags)
 760 {
 761         struct special_entry *field;
 762
 763         trace_assign_type(field, entry);
 764
 765         SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
 766         SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
 767         SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
 768
 769         return 0;
 770 }
 771
 772 static int
 773 trace_special_bin(struct trace_seq *s, struct trace_entry *entry, int flags)
 774 {
 775         struct special_entry *field;
 776
 777         trace_assign_type(field, entry);
 778
 779         SEQ_PUT_FIELD_RET(s, field->arg1);
 780         SEQ_PUT_FIELD_RET(s, field->arg2);
 781         SEQ_PUT_FIELD_RET(s, field->arg3);
 782
 783         return 0;
 784 }
 785
 786 static struct trace_event trace_special_event = {
 787         .type           = TRACE_SPECIAL,
 788         .trace          = trace_special_print,
 789         .latency_trace  = trace_special_print,
 790         .raw            = trace_special_print,
 791         .hex            = trace_special_hex,
 792         .binary         = trace_special_bin,
 793 };
 794
 795 /* TRACE_STACK */
 796
 797 static int
 798 trace_stack_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 799 {
 800         struct stack_entry *field;
 801         int i;
 802
 803         trace_assign_type(field, entry);
 804
 805         for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 806                 if (i) {
 807                         if (!trace_seq_puts(s, " <= "))
 808                                 goto partial;
 809
 810                         if (!seq_print_ip_sym(s, field->caller[i], flags))
 811                                 goto partial;
 812                 }
 813                 if (!trace_seq_puts(s, "\n"))
 814                         goto partial;
 815         }
 816
 817         return 0;
 818
 819  partial:
 820         return TRACE_TYPE_PARTIAL_LINE;
 821 }
 822
 823 static struct trace_event trace_stack_event = {
 824         .type           = TRACE_STACK,
 825         .trace          = trace_stack_print,
 826         .latency_trace  = trace_stack_print,
 827         .raw            = trace_special_print,
 828         .hex            = trace_special_hex,
 829         .binary         = trace_special_bin,
 830 };
 831
 832 /* TRACE_USER_STACK */
 833 static int
 834 trace_user_stack_print(struct trace_seq *s, struct trace_entry *entry,
 835                        int flags)
 836 {
 837         struct userstack_entry *field;
 838
 839         trace_assign_type(field, entry);
 840
 841         if (!seq_print_userip_objs(field, s, flags))
 842                 goto partial;
 843
 844         if (!trace_seq_putc(s, '\n'))
 845                 goto partial;
 846
 847         return 0;
 848
 849  partial:
 850         return TRACE_TYPE_PARTIAL_LINE;
 851 }
 852
 853 static struct trace_event trace_user_stack_event = {
 854         .type           = TRACE_USER_STACK,
 855         .trace          = trace_user_stack_print,
 856         .latency_trace  = trace_user_stack_print,
 857         .raw            = trace_special_print,
 858         .hex            = trace_special_hex,
 859         .binary         = trace_special_bin,
 860 };
 861
 862 /* TRACE_PRINT */
 863 static int
 864 trace_print_print(struct trace_seq *s, struct trace_entry *entry, int flags)
 865 {
 866         struct print_entry *field;
 867
 868         trace_assign_type(field, entry);
 869
 870         if (!seq_print_ip_sym(s, field->ip, flags))
 871                 goto partial;
 872
 873         if (!trace_seq_printf(s, ": %s", field->buf))
 874                 goto partial;
 875
 876         return 0;
 877
 878  partial:
 879         return TRACE_TYPE_PARTIAL_LINE;
 880 }
 881
 882 static int
 883 trace_print_raw(struct trace_seq *s, struct trace_entry *entry, int flags)
 884 {
 885         struct print_entry *field;
 886
 887         trace_assign_type(field, entry);
 888
 889         if (!trace_seq_printf(s, "# %lx %s", field->ip, field->buf))
 890                 goto partial;
 891
 892         return 0;
 893
 894  partial:
 895         return TRACE_TYPE_PARTIAL_LINE;
 896 }
 897
 898 static struct trace_event trace_print_event = {
 899         .type           = TRACE_PRINT,
 900         .trace          = trace_print_print,
 901         .latency_trace  = trace_print_print,
 902         .raw            = trace_print_raw,
 903         .hex            = trace_nop_print,
 904         .binary         = trace_nop_print,
 905 };
 906
 907 static struct trace_event *events[] __initdata = {
 908         &trace_fn_event,
 909         &trace_ctx_event,
 910         &trace_wake_event,
 911         &trace_special_event,
 912         &trace_stack_event,
 913         &trace_user_stack_event,
 914         &trace_print_event,
 915         NULL
 916 };
 917
 918 __init static int init_events(void)
 919 {
 920         struct trace_event *event;
 921         int i, ret;
 922
 923         for (i = 0; events[i]; i++) {
 924                 event = events[i];
 925
 926                 ret = register_ftrace_event(event);
 927                 if (!ret) {
 928                         printk(KERN_WARNING "event %d failed to register\n",
 929                                event->type);
 930                         WARN_ON_ONCE(1);
 931                 }
 932         }
 933
 934         return 0;
 935 }
 936 device_initcall(init_events);