Documentation/perf_counter/builtin-report.c

   1 #define _GNU_SOURCE
   2 #include <sys/types.h>
   3 #include <sys/stat.h>
   4 #include <sys/time.h>
   5 #include <unistd.h>
   6 #include <stdint.h>
   7 #include <stdbool.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <limits.h>
  11 #include <gelf.h>
  12 #include <elf.h>
  13 #include <libelf.h>
  14 #include <fcntl.h>
  15 #include <stdio.h>
  16 #include <errno.h>
  17 #include <ctype.h>
  18 #include <time.h>
  19 #include <getopt.h>
  20 #include <assert.h>
  21 #include <search.h>
  22
  23 #include <sys/ioctl.h>
  24 #include <sys/poll.h>
  25 #include <sys/prctl.h>
  26 #include <sys/wait.h>
  27 #include <sys/mman.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30
  31 #include <linux/unistd.h>
  32 #include <linux/types.h>
  33
  34 #include "../../include/linux/perf_counter.h"
  35 #include "util/list.h"
  36 #include "util/rbtree.h"
  37
  38 #define SHOW_KERNEL     1
  39 #define SHOW_USER       2
  40 #define SHOW_HV         4
  41
  42 static char             const *input_name = "output.perf";
  43 static int              input;
  44 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
  45
  46 static unsigned long    page_size;
  47 static unsigned long    mmap_window = 32;
  48
  49 static const char *perf_event_names[] = {
  50         [PERF_EVENT_MMAP]   = " PERF_EVENT_MMAP",
  51         [PERF_EVENT_MUNMAP] = " PERF_EVENT_MUNMAP",
  52         [PERF_EVENT_COMM]   = " PERF_EVENT_COMM",
  53 };
  54
  55 struct ip_event {
  56         struct perf_event_header header;
  57         __u64 ip;
  58         __u32 pid, tid;
  59 };
  60 struct mmap_event {
  61         struct perf_event_header header;
  62         __u32 pid, tid;
  63         __u64 start;
  64         __u64 len;
  65         __u64 pgoff;
  66         char filename[PATH_MAX];
  67 };
  68 struct comm_event {
  69         struct perf_event_header header;
  70         __u32 pid,tid;
  71         char comm[16];
  72 };
  73
  74 typedef union event_union {
  75         struct perf_event_header header;
  76         struct ip_event ip;
  77         struct mmap_event mmap;
  78         struct comm_event comm;
  79 } event_t;
  80
  81 struct section {
  82         struct list_head node;
  83         uint64_t         start;
  84         uint64_t         end;
  85         uint64_t         offset;
  86         char             name[0];
  87 };
  88
  89 static struct section *section__new(uint64_t start, uint64_t size,
  90                                     uint64_t offset, char *name)
  91 {
  92         struct section *self = malloc(sizeof(*self) + strlen(name) + 1);
  93
  94         if (self != NULL) {
  95                 self->start  = start;
  96                 self->end    = start + size;
  97                 self->offset = offset;
  98                 strcpy(self->name, name);
  99         }
 100
 101         return self;
 102 }
 103
 104 static void section__delete(struct section *self)
 105 {
 106         free(self);
 107 }
 108
 109 struct symbol {
 110         struct rb_node rb_node;
 111         uint64_t       start;
 112         uint64_t       end;
 113         char           name[0];
 114 };
 115
 116 static struct symbol *symbol__new(uint64_t start, uint64_t len, const char *name)
 117 {
 118         struct symbol *self = malloc(sizeof(*self) + strlen(name) + 1);
 119
 120         if (self != NULL) {
 121                 self->start = start;
 122                 self->end   = start + len;
 123                 strcpy(self->name, name);
 124         }
 125
 126         return self;
 127 }
 128
 129 static void symbol__delete(struct symbol *self)
 130 {
 131         free(self);
 132 }
 133
 134 static size_t symbol__fprintf(struct symbol *self, FILE *fp)
 135 {
 136         return fprintf(fp, " %lx-%lx %s\n",
 137                        self->start, self->end, self->name);
 138 }
 139
 140 struct dso {
 141         struct list_head node;
 142         struct list_head sections;
 143         struct rb_root   syms;
 144         char             name[0];
 145 };
 146
 147 static struct dso *dso__new(const char *name)
 148 {
 149         struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
 150
 151         if (self != NULL) {
 152                 strcpy(self->name, name);
 153                 INIT_LIST_HEAD(&self->sections);
 154                 self->syms = RB_ROOT;
 155         }
 156
 157         return self;
 158 }
 159
 160 static void dso__delete_sections(struct dso *self)
 161 {
 162         struct section *pos, *n;
 163
 164         list_for_each_entry_safe(pos, n, &self->sections, node)
 165                 section__delete(pos);
 166 }
 167
 168 static void dso__delete_symbols(struct dso *self)
 169 {
 170         struct symbol *pos;
 171         struct rb_node *next = rb_first(&self->syms);
 172
 173         while (next) {
 174                 pos = rb_entry(next, struct symbol, rb_node);
 175                 next = rb_next(&pos->rb_node);
 176                 symbol__delete(pos);
 177         }
 178 }
 179
 180 static void dso__delete(struct dso *self)
 181 {
 182         dso__delete_sections(self);
 183         dso__delete_symbols(self);
 184         free(self);
 185 }
 186
 187 static void dso__insert_symbol(struct dso *self, struct symbol *sym)
 188 {
 189         struct rb_node **p = &self->syms.rb_node;
 190         struct rb_node *parent = NULL;
 191         const uint64_t ip = sym->start;
 192         struct symbol *s;
 193
 194         while (*p != NULL) {
 195                 parent = *p;
 196                 s = rb_entry(parent, struct symbol, rb_node);
 197                 if (ip < s->start)
 198                         p = &(*p)->rb_left;
 199                 else
 200                         p = &(*p)->rb_right;
 201         }
 202         rb_link_node(&sym->rb_node, parent, p);
 203         rb_insert_color(&sym->rb_node, &self->syms);
 204 }
 205
 206 static struct symbol *dso__find_symbol(struct dso *self, uint64_t ip)
 207 {
 208         if (self == NULL)
 209                 return NULL;
 210
 211         struct rb_node *n = self->syms.rb_node;
 212
 213         while (n) {
 214                 struct symbol *s = rb_entry(n, struct symbol, rb_node);
 215
 216                 if (ip < s->start)
 217                         n = n->rb_left;
 218                 else if (ip > s->end)
 219                         n = n->rb_right;
 220                 else
 221                         return s;
 222         }
 223
 224         return NULL;
 225 }
 226
 227 /**
 228  * elf_symtab__for_each_symbol - iterate thru all the symbols
 229  *
 230  * @self: struct elf_symtab instance to iterate
 231  * @index: uint32_t index
 232  * @sym: GElf_Sym iterator
 233  */
 234 #define elf_symtab__for_each_symbol(syms, nr_syms, index, sym) \
 235         for (index = 0, gelf_getsym(syms, index, &sym);\
 236              index < nr_syms; \
 237              index++, gelf_getsym(syms, index, &sym))
 238
 239 static inline uint8_t elf_sym__type(const GElf_Sym *sym)
 240 {
 241         return GELF_ST_TYPE(sym->st_info);
 242 }
 243
 244 static inline bool elf_sym__is_function(const GElf_Sym *sym)
 245 {
 246         return elf_sym__type(sym) == STT_FUNC &&
 247                sym->st_name != 0 &&
 248                sym->st_shndx != SHN_UNDEF;
 249 }
 250
 251 static inline const char *elf_sym__name(const GElf_Sym *sym,
 252                                         const Elf_Data *symstrs)
 253 {
 254         return symstrs->d_buf + sym->st_name;
 255 }
 256
 257 static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
 258                                     GElf_Shdr *shp, const char *name,
 259                                     size_t *index)
 260 {
 261         Elf_Scn *sec = NULL;
 262         size_t cnt = 1;
 263
 264         while ((sec = elf_nextscn(elf, sec)) != NULL) {
 265                 char *str;
 266
 267                 gelf_getshdr(sec, shp);
 268                 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
 269                 if (!strcmp(name, str)) {
 270                         if (index)
 271                                 *index = cnt;
 272                         break;
 273                 }
 274                 ++cnt;
 275         }
 276
 277         return sec;
 278 }
 279
 280 static int dso__load(struct dso *self)
 281 {
 282         int fd = open(self->name, O_RDONLY), err = -1;
 283
 284         if (fd == -1)
 285                 return -1;
 286
 287         Elf *elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
 288         if (elf == NULL) {
 289                 fprintf(stderr, "%s: cannot read %s ELF file.\n",
 290                         __func__, self->name);
 291                 goto out_close;
 292         }
 293
 294         GElf_Ehdr ehdr;
 295         if (gelf_getehdr(elf, &ehdr) == NULL) {
 296                 fprintf(stderr, "%s: cannot get elf header.\n", __func__);
 297                 goto out_elf_end;
 298         }
 299
 300         GElf_Shdr shdr;
 301         Elf_Scn *sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
 302         if (sec == NULL)
 303                 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
 304
 305         if (sec == NULL)
 306                 goto out_elf_end;
 307
 308         if (gelf_getshdr(sec, &shdr) == NULL)
 309                 goto out_elf_end;
 310
 311         Elf_Data *syms = elf_getdata(sec, NULL);
 312         if (syms == NULL)
 313                 goto out_elf_end;
 314
 315         sec = elf_getscn(elf, shdr.sh_link);
 316         if (sec == NULL)
 317                 goto out_elf_end;
 318
 319         Elf_Data *symstrs = elf_getdata(sec, NULL);
 320         if (symstrs == NULL)
 321                 goto out_elf_end;
 322
 323         const uint32_t nr_syms = shdr.sh_size / shdr.sh_entsize;
 324
 325         GElf_Sym sym;
 326         uint32_t index;
 327         elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
 328                 if (!elf_sym__is_function(&sym))
 329                         continue;
 330                 struct symbol *f = symbol__new(sym.st_value, sym.st_size,
 331                                                elf_sym__name(&sym, symstrs));
 332                 if (f == NULL)
 333                         goto out_elf_end;
 334
 335                 dso__insert_symbol(self, f);
 336         }
 337
 338         err = 0;
 339 out_elf_end:
 340         elf_end(elf);
 341 out_close:
 342         close(fd);
 343         return err;
 344 }
 345
 346 static size_t dso__fprintf(struct dso *self, FILE *fp)
 347 {
 348         size_t ret = fprintf(fp, "dso: %s\n", self->name);
 349
 350         struct rb_node *nd;
 351         for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
 352                 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
 353                 ret += symbol__fprintf(pos, fp);
 354         }
 355
 356         return ret;
 357 }
 358
 359 static LIST_HEAD(dsos);
 360 static struct dso *kernel_dso;
 361
 362 static void dsos__add(struct dso *dso)
 363 {
 364         list_add_tail(&dso->node, &dsos);
 365 }
 366
 367 static struct dso *dsos__find(const char *name)
 368 {
 369         struct dso *pos;
 370
 371         list_for_each_entry(pos, &dsos, node)
 372                 if (strcmp(pos->name, name) == 0)
 373                         return pos;
 374         return NULL;
 375 }
 376
 377 static struct dso *dsos__findnew(const char *name)
 378 {
 379         struct dso *dso = dsos__find(name);
 380
 381         if (dso == NULL) {
 382                 dso = dso__new(name);
 383                 if (dso != NULL && dso__load(dso) < 0)
 384                         goto out_delete_dso;
 385
 386                 dsos__add(dso);
 387         }
 388
 389         return dso;
 390
 391 out_delete_dso:
 392         dso__delete(dso);
 393         return NULL;
 394 }
 395
 396 static void dsos__fprintf(FILE *fp)
 397 {
 398         struct dso *pos;
 399
 400         list_for_each_entry(pos, &dsos, node)
 401                 dso__fprintf(pos, fp);
 402 }
 403
 404 static int load_kallsyms(void)
 405 {
 406         kernel_dso = dso__new("[kernel]");
 407         if (kernel_dso == NULL)
 408                 return -1;
 409
 410         FILE *file = fopen("/proc/kallsyms", "r");
 411
 412         if (file == NULL)
 413                 goto out_delete_dso;
 414
 415         char *line = NULL;
 416         size_t n;
 417
 418         while (!feof(file)) {
 419                 unsigned long long start;
 420                 char c, symbf[4096];
 421
 422                 if (getline(&line, &n, file) < 0)
 423                         break;
 424
 425                 if (!line)
 426                         goto out_delete_dso;
 427
 428                 if (sscanf(line, "%llx %c %s", &start, &c, symbf) == 3) {
 429                         struct symbol *sym = symbol__new(start, 0x1000000, symbf);
 430
 431                         if (sym == NULL)
 432                                 goto out_delete_dso;
 433
 434                         dso__insert_symbol(kernel_dso, sym);
 435                 }
 436         }
 437
 438         dsos__add(kernel_dso);
 439         free(line);
 440         fclose(file);
 441         return 0;
 442
 443 out_delete_dso:
 444         dso__delete(kernel_dso);
 445         return -1;
 446 }
 447
 448 struct map {
 449         struct list_head node;
 450         uint64_t         start;
 451         uint64_t         end;
 452         uint64_t         pgoff;
 453         struct dso       *dso;
 454 };
 455
 456 static struct map *map__new(struct mmap_event *event)
 457 {
 458         struct map *self = malloc(sizeof(*self));
 459
 460         if (self != NULL) {
 461                 self->start = event->start;
 462                 self->end   = event->start + event->len;
 463                 self->pgoff = event->pgoff;
 464
 465                 self->dso = dsos__findnew(event->filename);
 466                 if (self->dso == NULL)
 467                         goto out_delete;
 468         }
 469         return self;
 470 out_delete:
 471         free(self);
 472         return NULL;
 473 }
 474
 475 static size_t map__fprintf(struct map *self, FILE *fp)
 476 {
 477         return fprintf(fp, " %lx-%lx %lx %s\n",
 478                        self->start, self->end, self->pgoff, self->dso->name);
 479 }
 480
 481 struct symhist {
 482         struct rb_node   rb_node;
 483         struct dso       *dso;
 484         struct symbol    *sym;
 485         uint64_t         ip;
 486         uint32_t         count;
 487         char             level;
 488 };
 489
 490 static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,
 491                                     struct dso *dso, char level)
 492 {
 493         struct symhist *self = malloc(sizeof(*self));
 494
 495         if (self != NULL) {
 496                 self->sym   = sym;
 497                 self->ip    = ip;
 498                 self->dso   = dso;
 499                 self->level = level;
 500                 self->count = 1;
 501         }
 502
 503         return self;
 504 }
 505
 506 static void symhist__delete(struct symhist *self)
 507 {
 508         free(self);
 509 }
 510
 511 static void symhist__inc(struct symhist *self)
 512 {
 513         ++self->count;
 514 }
 515
 516 static size_t symhist__fprintf(struct symhist *self, FILE *fp)
 517 {
 518         size_t ret = fprintf(fp, "%#llx [%c] ", (unsigned long long)self->ip, self->level);
 519
 520         if (self->level != '.')
 521                 ret += fprintf(fp, "%s", self->sym ? self->sym->name: "<unknown>");
 522         else
 523                 ret += fprintf(fp, "%s: %s",
 524                                self->dso ? self->dso->name : "<unknown",
 525                                self->sym ? self->sym->name : "<unknown>");
 526         return ret + fprintf(fp, ": %u\n", self->count);
 527 }
 528
 529 struct thread {
 530         struct rb_node   rb_node;
 531         struct list_head maps;
 532         struct rb_root   symhists;
 533         pid_t            pid;
 534         char             *comm;
 535 };
 536
 537 static struct thread *thread__new(pid_t pid)
 538 {
 539         struct thread *self = malloc(sizeof(*self));
 540
 541         if (self != NULL) {
 542                 self->pid = pid;
 543                 self->comm = NULL;
 544                 INIT_LIST_HEAD(&self->maps);
 545                 self->symhists = RB_ROOT;
 546         }
 547
 548         return self;
 549 }
 550
 551 static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
 552                                  uint64_t ip, struct dso *dso, char level)
 553 {
 554         struct rb_node **p = &self->symhists.rb_node;
 555         struct rb_node *parent = NULL;
 556         struct symhist *sh;
 557
 558         while (*p != NULL) {
 559                 parent = *p;
 560                 sh = rb_entry(parent, struct symhist, rb_node);
 561
 562                 if (sh->sym == sym || ip == sh->ip) {
 563                         symhist__inc(sh);
 564                         return 0;
 565                 }
 566
 567                 /* Handle unresolved symbols too */
 568                 const uint64_t start = !sh->sym ? sh->ip : sh->sym->start;
 569
 570                 if (ip < start)
 571                         p = &(*p)->rb_left;
 572                 else
 573                         p = &(*p)->rb_right;
 574         }
 575
 576         sh = symhist__new(sym, ip, dso, level);
 577         if (sh == NULL)
 578                 return -ENOMEM;
 579         rb_link_node(&sh->rb_node, parent, p);
 580         rb_insert_color(&sh->rb_node, &self->symhists);
 581         return 0;
 582 }
 583
 584 static int thread__set_comm(struct thread *self, const char *comm)
 585 {
 586         self->comm = strdup(comm);
 587         return self->comm ? 0 : -ENOMEM;
 588 }
 589
 590 static size_t thread__maps_fprintf(struct thread *self, FILE *fp)
 591 {
 592         struct map *pos;
 593         size_t ret = 0;
 594
 595         list_for_each_entry(pos, &self->maps, node)
 596                 ret += map__fprintf(pos, fp);
 597
 598         return ret;
 599 }
 600
 601 static size_t thread__fprintf(struct thread *self, FILE *fp)
 602 {
 603         int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);
 604         struct rb_node *nd;
 605
 606         for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {
 607                 struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
 608                 ret += symhist__fprintf(pos, fp);
 609         }
 610
 611         return ret;
 612 }
 613
 614 static struct rb_root threads = RB_ROOT;
 615
 616 static struct thread *threads__findnew(pid_t pid)
 617 {
 618         struct rb_node **p = &threads.rb_node;
 619         struct rb_node *parent = NULL;
 620         struct thread *th;
 621
 622         while (*p != NULL) {
 623                 parent = *p;
 624                 th = rb_entry(parent, struct thread, rb_node);
 625
 626                 if (th->pid == pid)
 627                         return th;
 628
 629                 if (pid < th->pid)
 630                         p = &(*p)->rb_left;
 631                 else
 632                         p = &(*p)->rb_right;
 633         }
 634
 635         th = thread__new(pid);
 636         if (th != NULL) {
 637                 rb_link_node(&th->rb_node, parent, p);
 638                 rb_insert_color(&th->rb_node, &threads);
 639         }
 640         return th;
 641 }
 642
 643 static void thread__insert_map(struct thread *self, struct map *map)
 644 {
 645         list_add_tail(&map->node, &self->maps);
 646 }
 647
 648 static struct map *thread__find_map(struct thread *self, uint64_t ip)
 649 {
 650         if (self == NULL)
 651                 return NULL;
 652
 653         struct map *pos;
 654
 655         list_for_each_entry(pos, &self->maps, node)
 656                 if (ip >= pos->start && ip <= pos->end)
 657                         return pos;
 658
 659         return NULL;
 660 }
 661
 662 static void threads__fprintf(FILE *fp)
 663 {
 664         struct rb_node *nd;
 665         for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
 666                 struct thread *pos = rb_entry(nd, struct thread, rb_node);
 667                 thread__fprintf(pos, fp);
 668         }
 669 }
 670
 671 static void display_help(void)
 672 {
 673         printf(
 674         "Usage: perf-report [<options>]\n"
 675         " -i file   --input=<file>      # input file\n"
 676         );
 677
 678         exit(0);
 679 }
 680
 681 static void process_options(int argc, char *argv[])
 682 {
 683         int error = 0;
 684
 685         for (;;) {
 686                 int option_index = 0;
 687                 /** Options for getopt */
 688                 static struct option long_options[] = {
 689                         {"input",       required_argument,      NULL, 'i'},
 690                         {"no-user",     no_argument,            NULL, 'u'},
 691                         {"no-kernel",   no_argument,            NULL, 'k'},
 692                         {"no-hv",       no_argument,            NULL, 'h'},
 693                         {NULL,          0,                      NULL,  0 }
 694                 };
 695                 int c = getopt_long(argc, argv, "+:i:kuh",
 696                                     long_options, &option_index);
 697                 if (c == -1)
 698                         break;
 699
 700                 switch (c) {
 701                 case 'i': input_name                    = strdup(optarg); break;
 702                 case 'k': show_mask &= ~SHOW_KERNEL; break;
 703                 case 'u': show_mask &= ~SHOW_USER; break;
 704                 case 'h': show_mask &= ~SHOW_HV; break;
 705                 default: error = 1; break;
 706                 }
 707         }
 708
 709         if (error)
 710                 display_help();
 711 }
 712
 713 int cmd_report(int argc, char **argv)
 714 {
 715         unsigned long offset = 0;
 716         unsigned long head = 0;
 717         struct stat stat;
 718         char *buf;
 719         event_t *event;
 720         int ret, rc = EXIT_FAILURE;
 721         unsigned long total = 0;
 722
 723         elf_version(EV_CURRENT);
 724
 725         page_size = getpagesize();
 726
 727         process_options(argc, argv);
 728
 729         input = open(input_name, O_RDONLY);
 730         if (input < 0) {
 731                 perror("failed to open file");
 732                 exit(-1);
 733         }
 734
 735         ret = fstat(input, &stat);
 736         if (ret < 0) {
 737                 perror("failed to stat file");
 738                 exit(-1);
 739         }
 740
 741         if (!stat.st_size) {
 742                 fprintf(stderr, "zero-sized file, nothing to do!\n");
 743                 exit(0);
 744         }
 745
 746         if (load_kallsyms() < 0) {
 747                 perror("failed to open kallsyms");
 748                 return EXIT_FAILURE;
 749         }
 750
 751 remap:
 752         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
 753                            MAP_SHARED, input, offset);
 754         if (buf == MAP_FAILED) {
 755                 perror("failed to mmap file");
 756                 exit(-1);
 757         }
 758
 759 more:
 760         event = (event_t *)(buf + head);
 761
 762         if (head + event->header.size >= page_size * mmap_window) {
 763                 unsigned long shift = page_size * (head / page_size);
 764                 int ret;
 765
 766                 ret = munmap(buf, page_size * mmap_window);
 767                 assert(ret == 0);
 768
 769                 offset += shift;
 770                 head -= shift;
 771                 goto remap;
 772         }
 773
 774
 775         if (!event->header.size) {
 776                 fprintf(stderr, "zero-sized event at file offset %ld\n", offset + head);
 777                 fprintf(stderr, "skipping %ld bytes of events.\n", stat.st_size - offset - head);
 778                 goto done;
 779         }
 780
 781         head += event->header.size;
 782
 783         if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
 784                 char level;
 785                 int show = 0;
 786                 struct dso *dso = NULL;
 787                 struct thread *thread = threads__findnew(event->ip.pid);
 788
 789                 if (thread == NULL) {
 790                         fprintf(stderr, "problem processing %d event, bailing out\n",
 791                                 event->header.type);
 792                         goto done;
 793                 }
 794
 795                 if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
 796                         show = SHOW_KERNEL;
 797                         level = 'k';
 798                         dso = kernel_dso;
 799                 } else if (event->header.misc & PERF_EVENT_MISC_USER) {
 800                         show = SHOW_USER;
 801                         level = '.';
 802                         struct map *map = thread__find_map(thread, event->ip.ip);
 803                         if (map != NULL)
 804                                 dso = map->dso;
 805                 } else {
 806                         show = SHOW_HV;
 807                         level = 'H';
 808                 }
 809
 810                 if (show & show_mask) {
 811                         struct symbol *sym = dso__find_symbol(dso, event->ip.ip);
 812
 813                         if (thread__symbol_incnew(thread, sym, event->ip.ip,
 814                                                   dso, level)) {
 815                                 fprintf(stderr, "problem incrementing symbol count, bailing out\n");
 816                                 goto done;
 817                         }
 818                 }
 819                 total++;
 820         } else switch (event->header.type) {
 821         case PERF_EVENT_MMAP: {
 822                 struct thread *thread = threads__findnew(event->mmap.pid);
 823                 struct map *map = map__new(&event->mmap);
 824
 825                 if (thread == NULL || map == NULL) {
 826                         fprintf(stderr, "problem processing PERF_EVENT_MMAP, bailing out\n");
 827                         goto done;
 828                 }
 829                 thread__insert_map(thread, map);
 830                 break;
 831         }
 832         case PERF_EVENT_COMM: {
 833                 struct thread *thread = threads__findnew(event->comm.pid);
 834
 835                 if (thread == NULL ||
 836                     thread__set_comm(thread, event->comm.comm)) {
 837                         fprintf(stderr, "problem processing PERF_EVENT_COMM, bailing out\n");
 838                         goto done;
 839                 }
 840                 break;
 841         }
 842         }
 843
 844         if (offset + head < stat.st_size)
 845                 goto more;
 846
 847         rc = EXIT_SUCCESS;
 848 done:
 849         close(input);
 850         //dsos__fprintf(stdout);
 851         threads__fprintf(stdout);
 852 #if 0
 853         std::map<std::string, int>::iterator hi = hist.begin();
 854
 855         while (hi != hist.end()) {
 856                 rev_hist.insert(std::pair<int, std::string>(hi->second, hi->first));
 857                 hist.erase(hi++);
 858         }
 859
 860         std::multimap<int, std::string>::const_iterator ri = rev_hist.begin();
 861
 862         while (ri != rev_hist.end()) {
 863                 printf(" %5.2f %s\n", (100.0 * ri->first)/total, ri->second.c_str());
 864                 ri++;
 865         }
 866 #endif
 867         return rc;
 868 }
 869