tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include "event.h"
   3 #include "debug.h"
   4 #include "session.h"
   5 #include "sort.h"
   6 #include "string.h"
   7 #include "strlist.h"
   8 #include "thread.h"
   9
  10 const char *event__name[] = {
  11         [0]                      = "TOTAL",
  12         [PERF_RECORD_MMAP]       = "MMAP",
  13         [PERF_RECORD_LOST]       = "LOST",
  14         [PERF_RECORD_COMM]       = "COMM",
  15         [PERF_RECORD_EXIT]       = "EXIT",
  16         [PERF_RECORD_THROTTLE]   = "THROTTLE",
  17         [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
  18         [PERF_RECORD_FORK]       = "FORK",
  19         [PERF_RECORD_READ]       = "READ",
  20         [PERF_RECORD_SAMPLE]     = "SAMPLE",
  21         [PERF_RECORD_HEADER_ATTR]        = "ATTR",
  22         [PERF_RECORD_HEADER_EVENT_TYPE]  = "EVENT_TYPE",
  23         [PERF_RECORD_HEADER_TRACING_DATA]        = "TRACING_DATA",
  24         [PERF_RECORD_HEADER_BUILD_ID]    = "BUILD_ID",
  25 };
  26
  27 static pid_t event__synthesize_comm(pid_t pid, int full,
  28                                     event__handler_t process,
  29                                     struct perf_session *session)
  30 {
  31         event_t ev;
  32         char filename[PATH_MAX];
  33         char bf[BUFSIZ];
  34         FILE *fp;
  35         size_t size = 0;
  36         DIR *tasks;
  37         struct dirent dirent, *next;
  38         pid_t tgid = 0;
  39
  40         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  41
  42         fp = fopen(filename, "r");
  43         if (fp == NULL) {
  44 out_race:
  45                 /*
  46                  * We raced with a task exiting - just return:
  47                  */
  48                 pr_debug("couldn't open %s\n", filename);
  49                 return 0;
  50         }
  51
  52         memset(&ev.comm, 0, sizeof(ev.comm));
  53         while (!ev.comm.comm[0] || !ev.comm.pid) {
  54                 if (fgets(bf, sizeof(bf), fp) == NULL)
  55                         goto out_failure;
  56
  57                 if (memcmp(bf, "Name:", 5) == 0) {
  58                         char *name = bf + 5;
  59                         while (*name && isspace(*name))
  60                                 ++name;
  61                         size = strlen(name) - 1;
  62                         memcpy(ev.comm.comm, name, size++);
  63                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  64                         char *tgids = bf + 5;
  65                         while (*tgids && isspace(*tgids))
  66                                 ++tgids;
  67                         tgid = ev.comm.pid = atoi(tgids);
  68                 }
  69         }
  70
  71         ev.comm.header.type = PERF_RECORD_COMM;
  72         size = ALIGN(size, sizeof(u64));
  73         ev.comm.header.size = sizeof(ev.comm) - (sizeof(ev.comm.comm) - size);
  74
  75         if (!full) {
  76                 ev.comm.tid = pid;
  77
  78                 process(&ev, session);
  79                 goto out_fclose;
  80         }
  81
  82         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
  83
  84         tasks = opendir(filename);
  85         if (tasks == NULL)
  86                 goto out_race;
  87
  88         while (!readdir_r(tasks, &dirent, &next) && next) {
  89                 char *end;
  90                 pid = strtol(dirent.d_name, &end, 10);
  91                 if (*end)
  92                         continue;
  93
  94                 ev.comm.tid = pid;
  95
  96                 process(&ev, session);
  97         }
  98         closedir(tasks);
  99
 100 out_fclose:
 101         fclose(fp);
 102         return tgid;
 103
 104 out_failure:
 105         pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
 106         return -1;
 107 }
 108
 109 static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
 110                                          event__handler_t process,
 111                                          struct perf_session *session)
 112 {
 113         char filename[PATH_MAX];
 114         FILE *fp;
 115
 116         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 117
 118         fp = fopen(filename, "r");
 119         if (fp == NULL) {
 120                 /*
 121                  * We raced with a task exiting - just return:
 122                  */
 123                 pr_debug("couldn't open %s\n", filename);
 124                 return -1;
 125         }
 126
 127         while (1) {
 128                 char bf[BUFSIZ], *pbf = bf;
 129                 event_t ev = {
 130                         .header = {
 131                                 .type = PERF_RECORD_MMAP,
 132                                 /*
 133                                  * Just like the kernel, see __perf_event_mmap
 134                                  * in kernel/perf_event.c
 135                                  */
 136                                 .misc = PERF_RECORD_MISC_USER,
 137                          },
 138                 };
 139                 int n;
 140                 size_t size;
 141                 if (fgets(bf, sizeof(bf), fp) == NULL)
 142                         break;
 143
 144                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 145                 n = hex2u64(pbf, &ev.mmap.start);
 146                 if (n < 0)
 147                         continue;
 148                 pbf += n + 1;
 149                 n = hex2u64(pbf, &ev.mmap.len);
 150                 if (n < 0)
 151                         continue;
 152                 pbf += n + 3;
 153                 if (*pbf == 'x') { /* vm_exec */
 154                         u64 vm_pgoff;
 155                         char *execname = strchr(bf, '/');
 156
 157                         /* Catch VDSO */
 158                         if (execname == NULL)
 159                                 execname = strstr(bf, "[vdso]");
 160
 161                         if (execname == NULL)
 162                                 continue;
 163
 164                         pbf += 3;
 165                         n = hex2u64(pbf, &vm_pgoff);
 166                         /* pgoff is in bytes, not pages */
 167                         if (n >= 0)
 168                                 ev.mmap.pgoff = vm_pgoff << getpagesize();
 169                         else
 170                                 ev.mmap.pgoff = 0;
 171
 172                         size = strlen(execname);
 173                         execname[size - 1] = '\0'; /* Remove \n */
 174                         memcpy(ev.mmap.filename, execname, size);
 175                         size = ALIGN(size, sizeof(u64));
 176                         ev.mmap.len -= ev.mmap.start;
 177                         ev.mmap.header.size = (sizeof(ev.mmap) -
 178                                                (sizeof(ev.mmap.filename) - size));
 179                         ev.mmap.pid = tgid;
 180                         ev.mmap.tid = pid;
 181
 182                         process(&ev, session);
 183                 }
 184         }
 185
 186         fclose(fp);
 187         return 0;
 188 }
 189
 190 int event__synthesize_modules(event__handler_t process,
 191                               struct perf_session *session,
 192                               struct machine *machine)
 193 {
 194         struct rb_node *nd;
 195         struct map_groups *kmaps = &machine->kmaps;
 196         u16 misc;
 197
 198         /*
 199          * kernel uses 0 for user space maps, see kernel/perf_event.c
 200          * __perf_event_mmap
 201          */
 202         if (machine__is_host(machine))
 203                 misc = PERF_RECORD_MISC_KERNEL;
 204         else
 205                 misc = PERF_RECORD_MISC_GUEST_KERNEL;
 206
 207         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 208              nd; nd = rb_next(nd)) {
 209                 event_t ev;
 210                 size_t size;
 211                 struct map *pos = rb_entry(nd, struct map, rb_node);
 212
 213                 if (pos->dso->kernel)
 214                         continue;
 215
 216                 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 217                 memset(&ev, 0, sizeof(ev));
 218                 ev.mmap.header.misc = misc;
 219                 ev.mmap.header.type = PERF_RECORD_MMAP;
 220                 ev.mmap.header.size = (sizeof(ev.mmap) -
 221                                         (sizeof(ev.mmap.filename) - size));
 222                 ev.mmap.start = pos->start;
 223                 ev.mmap.len   = pos->end - pos->start;
 224                 ev.mmap.pid   = machine->pid;
 225
 226                 memcpy(ev.mmap.filename, pos->dso->long_name,
 227                        pos->dso->long_name_len + 1);
 228                 process(&ev, session);
 229         }
 230
 231         return 0;
 232 }
 233
 234 int event__synthesize_thread(pid_t pid, event__handler_t process,
 235                              struct perf_session *session)
 236 {
 237         pid_t tgid = event__synthesize_comm(pid, 1, process, session);
 238         if (tgid == -1)
 239                 return -1;
 240         return event__synthesize_mmap_events(pid, tgid, process, session);
 241 }
 242
 243 void event__synthesize_threads(event__handler_t process,
 244                                struct perf_session *session)
 245 {
 246         DIR *proc;
 247         struct dirent dirent, *next;
 248
 249         proc = opendir("/proc");
 250
 251         while (!readdir_r(proc, &dirent, &next) && next) {
 252                 char *end;
 253                 pid_t pid = strtol(dirent.d_name, &end, 10);
 254
 255                 if (*end) /* only interested in proper numerical dirents */
 256                         continue;
 257
 258                 event__synthesize_thread(pid, process, session);
 259         }
 260
 261         closedir(proc);
 262 }
 263
 264 struct process_symbol_args {
 265         const char *name;
 266         u64        start;
 267 };
 268
 269 static int find_symbol_cb(void *arg, const char *name, char type, u64 start)
 270 {
 271         struct process_symbol_args *args = arg;
 272
 273         /*
 274          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 275          * an 'A' to the same address as "_stext".
 276          */
 277         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 278               type == 'A') || strcmp(name, args->name))
 279                 return 0;
 280
 281         args->start = start;
 282         return 1;
 283 }
 284
 285 int event__synthesize_kernel_mmap(event__handler_t process,
 286                                   struct perf_session *session,
 287                                   struct machine *machine,
 288                                   const char *symbol_name)
 289 {
 290         size_t size;
 291         const char *filename, *mmap_name;
 292         char path[PATH_MAX];
 293         char name_buff[PATH_MAX];
 294         struct map *map;
 295
 296         event_t ev = {
 297                 .header = {
 298                         .type = PERF_RECORD_MMAP,
 299                 },
 300         };
 301         /*
 302          * We should get this from /sys/kernel/sections/.text, but till that is
 303          * available use this, and after it is use this as a fallback for older
 304          * kernels.
 305          */
 306         struct process_symbol_args args = { .name = symbol_name, };
 307
 308         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 309         if (machine__is_host(machine)) {
 310                 /*
 311                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 312                  * see kernel/perf_event.c __perf_event_mmap
 313                  */
 314                 ev.header.misc = PERF_RECORD_MISC_KERNEL;
 315                 filename = "/proc/kallsyms";
 316         } else {
 317                 ev.header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 318                 if (machine__is_default_guest(machine))
 319                         filename = (char *) symbol_conf.default_guest_kallsyms;
 320                 else {
 321                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 322                         filename = path;
 323                 }
 324         }
 325
 326         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
 327                 return -ENOENT;
 328
 329         map = machine->vmlinux_maps[MAP__FUNCTION];
 330         size = snprintf(ev.mmap.filename, sizeof(ev.mmap.filename),
 331                         "%s%s", mmap_name, symbol_name) + 1;
 332         size = ALIGN(size, sizeof(u64));
 333         ev.mmap.header.size = (sizeof(ev.mmap) -
 334                         (sizeof(ev.mmap.filename) - size));
 335         ev.mmap.pgoff = args.start;
 336         ev.mmap.start = map->start;
 337         ev.mmap.len   = map->end - ev.mmap.start;
 338         ev.mmap.pid   = machine->pid;
 339
 340         return process(&ev, session);
 341 }
 342
 343 static void thread__comm_adjust(struct thread *self, struct hists *hists)
 344 {
 345         char *comm = self->comm;
 346
 347         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 348             (!symbol_conf.comm_list ||
 349              strlist__has_entry(symbol_conf.comm_list, comm))) {
 350                 u16 slen = strlen(comm);
 351
 352                 if (hists__new_col_len(hists, HISTC_COMM, slen))
 353                         hists__set_col_len(hists, HISTC_THREAD, slen + 6);
 354         }
 355 }
 356
 357 static int thread__set_comm_adjust(struct thread *self, const char *comm,
 358                                    struct hists *hists)
 359 {
 360         int ret = thread__set_comm(self, comm);
 361
 362         if (ret)
 363                 return ret;
 364
 365         thread__comm_adjust(self, hists);
 366
 367         return 0;
 368 }
 369
 370 int event__process_comm(event_t *self, struct perf_session *session)
 371 {
 372         struct thread *thread = perf_session__findnew(session, self->comm.tid);
 373
 374         dump_printf(": %s:%d\n", self->comm.comm, self->comm.tid);
 375
 376         if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm,
 377                                                       &session->hists)) {
 378                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 379                 return -1;
 380         }
 381
 382         return 0;
 383 }
 384
 385 int event__process_lost(event_t *self, struct perf_session *session)
 386 {
 387         dump_printf(": id:%Ld: lost:%Ld\n", self->lost.id, self->lost.lost);
 388         session->hists.stats.total_lost += self->lost.lost;
 389         return 0;
 390 }
 391
 392 static void event_set_kernel_mmap_len(struct map **maps, event_t *self)
 393 {
 394         maps[MAP__FUNCTION]->start = self->mmap.start;
 395         maps[MAP__FUNCTION]->end   = self->mmap.start + self->mmap.len;
 396         /*
 397          * Be a bit paranoid here, some perf.data file came with
 398          * a zero sized synthesized MMAP event for the kernel.
 399          */
 400         if (maps[MAP__FUNCTION]->end == 0)
 401                 maps[MAP__FUNCTION]->end = ~0UL;
 402 }
 403
 404 static int event__process_kernel_mmap(event_t *self,
 405                         struct perf_session *session)
 406 {
 407         struct map *map;
 408         char kmmap_prefix[PATH_MAX];
 409         struct machine *machine;
 410         enum dso_kernel_type kernel_type;
 411         bool is_kernel_mmap;
 412
 413         machine = perf_session__findnew_machine(session, self->mmap.pid);
 414         if (!machine) {
 415                 pr_err("Can't find id %d's machine\n", self->mmap.pid);
 416                 goto out_problem;
 417         }
 418
 419         machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
 420         if (machine__is_host(machine))
 421                 kernel_type = DSO_TYPE_KERNEL;
 422         else
 423                 kernel_type = DSO_TYPE_GUEST_KERNEL;
 424
 425         is_kernel_mmap = memcmp(self->mmap.filename,
 426                                 kmmap_prefix,
 427                                 strlen(kmmap_prefix)) == 0;
 428         if (self->mmap.filename[0] == '/' ||
 429             (!is_kernel_mmap && self->mmap.filename[0] == '[')) {
 430
 431                 char short_module_name[1024];
 432                 char *name, *dot;
 433
 434                 if (self->mmap.filename[0] == '/') {
 435                         name = strrchr(self->mmap.filename, '/');
 436                         if (name == NULL)
 437                                 goto out_problem;
 438
 439                         ++name; /* skip / */
 440                         dot = strrchr(name, '.');
 441                         if (dot == NULL)
 442                                 goto out_problem;
 443                         snprintf(short_module_name, sizeof(short_module_name),
 444                                         "[%.*s]", (int)(dot - name), name);
 445                         strxfrchar(short_module_name, '-', '_');
 446                 } else
 447                         strcpy(short_module_name, self->mmap.filename);
 448
 449                 map = machine__new_module(machine, self->mmap.start,
 450                                           self->mmap.filename);
 451                 if (map == NULL)
 452                         goto out_problem;
 453
 454                 name = strdup(short_module_name);
 455                 if (name == NULL)
 456                         goto out_problem;
 457
 458                 map->dso->short_name = name;
 459                 map->dso->sname_alloc = 1;
 460                 map->end = map->start + self->mmap.len;
 461         } else if (is_kernel_mmap) {
 462                 const char *symbol_name = (self->mmap.filename +
 463                                 strlen(kmmap_prefix));
 464                 /*
 465                  * Should be there already, from the build-id table in
 466                  * the header.
 467                  */
 468                 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
 469                                                      kmmap_prefix);
 470                 if (kernel == NULL)
 471                         goto out_problem;
 472
 473                 kernel->kernel = kernel_type;
 474                 if (__machine__create_kernel_maps(machine, kernel) < 0)
 475                         goto out_problem;
 476
 477                 event_set_kernel_mmap_len(machine->vmlinux_maps, self);
 478                 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
 479                                                          symbol_name,
 480                                                          self->mmap.pgoff);
 481                 if (machine__is_default_guest(machine)) {
 482                         /*
 483                          * preload dso of guest kernel and modules
 484                          */
 485                         dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
 486                                   NULL);
 487                 }
 488         }
 489         return 0;
 490 out_problem:
 491         return -1;
 492 }
 493
 494 int event__process_mmap(event_t *self, struct perf_session *session)
 495 {
 496         struct machine *machine;
 497         struct thread *thread;
 498         struct map *map;
 499         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 500         int ret = 0;
 501
 502         dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
 503                         self->mmap.pid, self->mmap.tid, self->mmap.start,
 504                         self->mmap.len, self->mmap.pgoff, self->mmap.filename);
 505
 506         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 507             cpumode == PERF_RECORD_MISC_KERNEL) {
 508                 ret = event__process_kernel_mmap(self, session);
 509                 if (ret < 0)
 510                         goto out_problem;
 511                 return 0;
 512         }
 513
 514         machine = perf_session__find_host_machine(session);
 515         if (machine == NULL)
 516                 goto out_problem;
 517         thread = perf_session__findnew(session, self->mmap.pid);
 518         if (thread == NULL)
 519                 goto out_problem;
 520         map = map__new(&machine->user_dsos, self->mmap.start,
 521                         self->mmap.len, self->mmap.pgoff,
 522                         self->mmap.pid, self->mmap.filename,
 523                         MAP__FUNCTION);
 524         if (map == NULL)
 525                 goto out_problem;
 526
 527         thread__insert_map(thread, map);
 528         return 0;
 529
 530 out_problem:
 531         dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 532         return 0;
 533 }
 534
 535 int event__process_task(event_t *self, struct perf_session *session)
 536 {
 537         struct thread *thread = perf_session__findnew(session, self->fork.tid);
 538         struct thread *parent = perf_session__findnew(session, self->fork.ptid);
 539
 540         dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
 541                     self->fork.ppid, self->fork.ptid);
 542
 543         if (self->header.type == PERF_RECORD_EXIT) {
 544                 perf_session__remove_thread(session, thread);
 545                 return 0;
 546         }
 547
 548         if (thread == NULL || parent == NULL ||
 549             thread__fork(thread, parent) < 0) {
 550                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 551                 return -1;
 552         }
 553
 554         return 0;
 555 }
 556
 557 void thread__find_addr_map(struct thread *self,
 558                            struct perf_session *session, u8 cpumode,
 559                            enum map_type type, pid_t pid, u64 addr,
 560                            struct addr_location *al)
 561 {
 562         struct map_groups *mg = &self->mg;
 563         struct machine *machine = NULL;
 564
 565         al->thread = self;
 566         al->addr = addr;
 567         al->cpumode = cpumode;
 568         al->filtered = false;
 569
 570         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 571                 al->level = 'k';
 572                 machine = perf_session__find_host_machine(session);
 573                 if (machine == NULL) {
 574                         al->map = NULL;
 575                         return;
 576                 }
 577                 mg = &machine->kmaps;
 578         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 579                 al->level = '.';
 580                 machine = perf_session__find_host_machine(session);
 581         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 582                 al->level = 'g';
 583                 machine = perf_session__find_machine(session, pid);
 584                 if (machine == NULL) {
 585                         al->map = NULL;
 586                         return;
 587                 }
 588                 mg = &machine->kmaps;
 589         } else {
 590                 /*
 591                  * 'u' means guest os user space.
 592                  * TODO: We don't support guest user space. Might support late.
 593                  */
 594                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 595                         al->level = 'u';
 596                 else
 597                         al->level = 'H';
 598                 al->map = NULL;
 599
 600                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 601                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 602                         !perf_guest)
 603                         al->filtered = true;
 604                 if ((cpumode == PERF_RECORD_MISC_USER ||
 605                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 606                         !perf_host)
 607                         al->filtered = true;
 608
 609                 return;
 610         }
 611 try_again:
 612         al->map = map_groups__find(mg, type, al->addr);
 613         if (al->map == NULL) {
 614                 /*
 615                  * If this is outside of all known maps, and is a negative
 616                  * address, try to look it up in the kernel dso, as it might be
 617                  * a vsyscall or vdso (which executes in user-mode).
 618                  *
 619                  * XXX This is nasty, we should have a symbol list in the
 620                  * "[vdso]" dso, but for now lets use the old trick of looking
 621                  * in the whole kernel symbol list.
 622                  */
 623                 if ((long long)al->addr < 0 &&
 624                     cpumode == PERF_RECORD_MISC_KERNEL &&
 625                     machine && mg != &machine->kmaps) {
 626                         mg = &machine->kmaps;
 627                         goto try_again;
 628                 }
 629         } else
 630                 al->addr = al->map->map_ip(al->map, al->addr);
 631 }
 632
 633 void thread__find_addr_location(struct thread *self,
 634                                 struct perf_session *session, u8 cpumode,
 635                                 enum map_type type, pid_t pid, u64 addr,
 636                                 struct addr_location *al,
 637                                 symbol_filter_t filter)
 638 {
 639         thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
 640         if (al->map != NULL)
 641                 al->sym = map__find_symbol(al->map, al->addr, filter);
 642         else
 643                 al->sym = NULL;
 644 }
 645
 646 static void dso__calc_col_width(struct dso *self, struct hists *hists)
 647 {
 648         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 649             (!symbol_conf.dso_list ||
 650              strlist__has_entry(symbol_conf.dso_list, self->name))) {
 651                 u16 slen = dso__name_len(self);
 652                 hists__new_col_len(hists, HISTC_DSO, slen);
 653         }
 654
 655         self->slen_calculated = 1;
 656 }
 657
 658 int event__preprocess_sample(const event_t *self, struct perf_session *session,
 659                              struct addr_location *al, struct sample_data *data,
 660                              symbol_filter_t filter)
 661 {
 662         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 663         struct thread *thread;
 664
 665         event__parse_sample(self, session->sample_type, data);
 666
 667         dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld cpu:%d\n",
 668                     self->header.misc, data->pid, data->tid, data->ip,
 669                     data->period, data->cpu);
 670
 671         if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
 672                 unsigned int i;
 673
 674                 dump_printf("... chain: nr:%Lu\n", data->callchain->nr);
 675
 676                 if (!ip_callchain__valid(data->callchain, self)) {
 677                         pr_debug("call-chain problem with event, "
 678                                  "skipping it.\n");
 679                         goto out_filtered;
 680                 }
 681
 682                 if (dump_trace) {
 683                         for (i = 0; i < data->callchain->nr; i++)
 684                                 dump_printf("..... %2d: %016Lx\n",
 685                                             i, data->callchain->ips[i]);
 686                 }
 687         }
 688         thread = perf_session__findnew(session, self->ip.pid);
 689         if (thread == NULL)
 690                 return -1;
 691
 692         if (symbol_conf.comm_list &&
 693             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 694                 goto out_filtered;
 695
 696         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 697         /*
 698          * Have we already created the kernel maps for the host machine?
 699          *
 700          * This should have happened earlier, when we processed the kernel MMAP
 701          * events, but for older perf.data files there was no such thing, so do
 702          * it now.
 703          */
 704         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 705             session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
 706                 machine__create_kernel_maps(&session->host_machine);
 707
 708         thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 709                               self->ip.pid, self->ip.ip, al);
 710         dump_printf(" ...... dso: %s\n",
 711                     al->map ? al->map->dso->long_name :
 712                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 713         al->sym = NULL;
 714         al->cpu = data->cpu;
 715
 716         if (al->map) {
 717                 if (symbol_conf.dso_list &&
 718                     (!al->map || !al->map->dso ||
 719                      !(strlist__has_entry(symbol_conf.dso_list,
 720                                           al->map->dso->short_name) ||
 721                        (al->map->dso->short_name != al->map->dso->long_name &&
 722                         strlist__has_entry(symbol_conf.dso_list,
 723                                            al->map->dso->long_name)))))
 724                         goto out_filtered;
 725                 /*
 726                  * We have to do this here as we may have a dso with no symbol
 727                  * hit that has a name longer than the ones with symbols
 728                  * sampled.
 729                  */
 730                 if (!sort_dso.elide && !al->map->dso->slen_calculated)
 731                         dso__calc_col_width(al->map->dso, &session->hists);
 732
 733                 al->sym = map__find_symbol(al->map, al->addr, filter);
 734         } else {
 735                 const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
 736
 737                 if (hists__col_len(&session->hists, HISTC_DSO) < unresolved_col_width &&
 738                     !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 739                     !symbol_conf.dso_list)
 740                         hists__set_col_len(&session->hists, HISTC_DSO,
 741                                            unresolved_col_width);
 742         }
 743
 744         if (symbol_conf.sym_list && al->sym &&
 745             !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
 746                 goto out_filtered;
 747
 748         return 0;
 749
 750 out_filtered:
 751         al->filtered = true;
 752         return 0;
 753 }
 754
 755 int event__parse_sample(const event_t *event, u64 type, struct sample_data *data)
 756 {
 757         const u64 *array = event->sample.array;
 758
 759         if (type & PERF_SAMPLE_IP) {
 760                 data->ip = event->ip.ip;
 761                 array++;
 762         }
 763
 764         if (type & PERF_SAMPLE_TID) {
 765                 u32 *p = (u32 *)array;
 766                 data->pid = p[0];
 767                 data->tid = p[1];
 768                 array++;
 769         }
 770
 771         if (type & PERF_SAMPLE_TIME) {
 772                 data->time = *array;
 773                 array++;
 774         }
 775
 776         if (type & PERF_SAMPLE_ADDR) {
 777                 data->addr = *array;
 778                 array++;
 779         }
 780
 781         data->id = -1ULL;
 782         if (type & PERF_SAMPLE_ID) {
 783                 data->id = *array;
 784                 array++;
 785         }
 786
 787         if (type & PERF_SAMPLE_STREAM_ID) {
 788                 data->stream_id = *array;
 789                 array++;
 790         }
 791
 792         if (type & PERF_SAMPLE_CPU) {
 793                 u32 *p = (u32 *)array;
 794                 data->cpu = *p;
 795                 array++;
 796         } else
 797                 data->cpu = -1;
 798
 799         if (type & PERF_SAMPLE_PERIOD) {
 800                 data->period = *array;
 801                 array++;
 802         }
 803
 804         if (type & PERF_SAMPLE_READ) {
 805                 pr_debug("PERF_SAMPLE_READ is unsuported for now\n");
 806                 return -1;
 807         }
 808
 809         if (type & PERF_SAMPLE_CALLCHAIN) {
 810                 data->callchain = (struct ip_callchain *)array;
 811                 array += 1 + data->callchain->nr;
 812         }
 813
 814         if (type & PERF_SAMPLE_RAW) {
 815                 u32 *p = (u32 *)array;
 816                 data->raw_size = *p;
 817                 p++;
 818                 data->raw_data = p;
 819         }
 820
 821         return 0;
 822 }