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                         char *execname = strchr(bf, '/');
 155
 156                         /* Catch VDSO */
 157                         if (execname == NULL)
 158                                 execname = strstr(bf, "[vdso]");
 159
 160                         if (execname == NULL)
 161                                 continue;
 162
 163                         pbf += 3;
 164                         n = hex2u64(pbf, &ev.mmap.pgoff);
 165
 166                         size = strlen(execname);
 167                         execname[size - 1] = '\0'; /* Remove \n */
 168                         memcpy(ev.mmap.filename, execname, size);
 169                         size = ALIGN(size, sizeof(u64));
 170                         ev.mmap.len -= ev.mmap.start;
 171                         ev.mmap.header.size = (sizeof(ev.mmap) -
 172                                                (sizeof(ev.mmap.filename) - size));
 173                         ev.mmap.pid = tgid;
 174                         ev.mmap.tid = pid;
 175
 176                         process(&ev, session);
 177                 }
 178         }
 179
 180         fclose(fp);
 181         return 0;
 182 }
 183
 184 int event__synthesize_modules(event__handler_t process,
 185                               struct perf_session *session,
 186                               struct machine *machine)
 187 {
 188         struct rb_node *nd;
 189         struct map_groups *kmaps = &machine->kmaps;
 190         u16 misc;
 191
 192         /*
 193          * kernel uses 0 for user space maps, see kernel/perf_event.c
 194          * __perf_event_mmap
 195          */
 196         if (machine__is_host(machine))
 197                 misc = PERF_RECORD_MISC_KERNEL;
 198         else
 199                 misc = PERF_RECORD_MISC_GUEST_KERNEL;
 200
 201         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 202              nd; nd = rb_next(nd)) {
 203                 event_t ev;
 204                 size_t size;
 205                 struct map *pos = rb_entry(nd, struct map, rb_node);
 206
 207                 if (pos->dso->kernel)
 208                         continue;
 209
 210                 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 211                 memset(&ev, 0, sizeof(ev));
 212                 ev.mmap.header.misc = misc;
 213                 ev.mmap.header.type = PERF_RECORD_MMAP;
 214                 ev.mmap.header.size = (sizeof(ev.mmap) -
 215                                         (sizeof(ev.mmap.filename) - size));
 216                 ev.mmap.start = pos->start;
 217                 ev.mmap.len   = pos->end - pos->start;
 218                 ev.mmap.pid   = machine->pid;
 219
 220                 memcpy(ev.mmap.filename, pos->dso->long_name,
 221                        pos->dso->long_name_len + 1);
 222                 process(&ev, session);
 223         }
 224
 225         return 0;
 226 }
 227
 228 int event__synthesize_thread(pid_t pid, event__handler_t process,
 229                              struct perf_session *session)
 230 {
 231         pid_t tgid = event__synthesize_comm(pid, 1, process, session);
 232         if (tgid == -1)
 233                 return -1;
 234         return event__synthesize_mmap_events(pid, tgid, process, session);
 235 }
 236
 237 void event__synthesize_threads(event__handler_t process,
 238                                struct perf_session *session)
 239 {
 240         DIR *proc;
 241         struct dirent dirent, *next;
 242
 243         proc = opendir("/proc");
 244
 245         while (!readdir_r(proc, &dirent, &next) && next) {
 246                 char *end;
 247                 pid_t pid = strtol(dirent.d_name, &end, 10);
 248
 249                 if (*end) /* only interested in proper numerical dirents */
 250                         continue;
 251
 252                 event__synthesize_thread(pid, process, session);
 253         }
 254
 255         closedir(proc);
 256 }
 257
 258 struct process_symbol_args {
 259         const char *name;
 260         u64        start;
 261 };
 262
 263 static int find_symbol_cb(void *arg, const char *name, char type, u64 start)
 264 {
 265         struct process_symbol_args *args = arg;
 266
 267         /*
 268          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 269          * an 'A' to the same address as "_stext".
 270          */
 271         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 272               type == 'A') || strcmp(name, args->name))
 273                 return 0;
 274
 275         args->start = start;
 276         return 1;
 277 }
 278
 279 int event__synthesize_kernel_mmap(event__handler_t process,
 280                                   struct perf_session *session,
 281                                   struct machine *machine,
 282                                   const char *symbol_name)
 283 {
 284         size_t size;
 285         const char *filename, *mmap_name;
 286         char path[PATH_MAX];
 287         char name_buff[PATH_MAX];
 288         struct map *map;
 289
 290         event_t ev = {
 291                 .header = {
 292                         .type = PERF_RECORD_MMAP,
 293                 },
 294         };
 295         /*
 296          * We should get this from /sys/kernel/sections/.text, but till that is
 297          * available use this, and after it is use this as a fallback for older
 298          * kernels.
 299          */
 300         struct process_symbol_args args = { .name = symbol_name, };
 301
 302         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 303         if (machine__is_host(machine)) {
 304                 /*
 305                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 306                  * see kernel/perf_event.c __perf_event_mmap
 307                  */
 308                 ev.header.misc = PERF_RECORD_MISC_KERNEL;
 309                 filename = "/proc/kallsyms";
 310         } else {
 311                 ev.header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 312                 if (machine__is_default_guest(machine))
 313                         filename = (char *) symbol_conf.default_guest_kallsyms;
 314                 else {
 315                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 316                         filename = path;
 317                 }
 318         }
 319
 320         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
 321                 return -ENOENT;
 322
 323         map = machine->vmlinux_maps[MAP__FUNCTION];
 324         size = snprintf(ev.mmap.filename, sizeof(ev.mmap.filename),
 325                         "%s%s", mmap_name, symbol_name) + 1;
 326         size = ALIGN(size, sizeof(u64));
 327         ev.mmap.header.size = (sizeof(ev.mmap) -
 328                         (sizeof(ev.mmap.filename) - size));
 329         ev.mmap.pgoff = args.start;
 330         ev.mmap.start = map->start;
 331         ev.mmap.len   = map->end - ev.mmap.start;
 332         ev.mmap.pid   = machine->pid;
 333
 334         return process(&ev, session);
 335 }
 336
 337 static void thread__comm_adjust(struct thread *self, struct hists *hists)
 338 {
 339         char *comm = self->comm;
 340
 341         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 342             (!symbol_conf.comm_list ||
 343              strlist__has_entry(symbol_conf.comm_list, comm))) {
 344                 u16 slen = strlen(comm);
 345
 346                 if (hists__new_col_len(hists, HISTC_COMM, slen))
 347                         hists__set_col_len(hists, HISTC_THREAD, slen + 6);
 348         }
 349 }
 350
 351 static int thread__set_comm_adjust(struct thread *self, const char *comm,
 352                                    struct hists *hists)
 353 {
 354         int ret = thread__set_comm(self, comm);
 355
 356         if (ret)
 357                 return ret;
 358
 359         thread__comm_adjust(self, hists);
 360
 361         return 0;
 362 }
 363
 364 int event__process_comm(event_t *self, struct perf_session *session)
 365 {
 366         struct thread *thread = perf_session__findnew(session, self->comm.tid);
 367
 368         dump_printf(": %s:%d\n", self->comm.comm, self->comm.tid);
 369
 370         if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm,
 371                                                       &session->hists)) {
 372                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 373                 return -1;
 374         }
 375
 376         return 0;
 377 }
 378
 379 int event__process_lost(event_t *self, struct perf_session *session)
 380 {
 381         dump_printf(": id:%Ld: lost:%Ld\n", self->lost.id, self->lost.lost);
 382         session->hists.stats.total_lost += self->lost.lost;
 383         return 0;
 384 }
 385
 386 static void event_set_kernel_mmap_len(struct map **maps, event_t *self)
 387 {
 388         maps[MAP__FUNCTION]->start = self->mmap.start;
 389         maps[MAP__FUNCTION]->end   = self->mmap.start + self->mmap.len;
 390         /*
 391          * Be a bit paranoid here, some perf.data file came with
 392          * a zero sized synthesized MMAP event for the kernel.
 393          */
 394         if (maps[MAP__FUNCTION]->end == 0)
 395                 maps[MAP__FUNCTION]->end = ~0UL;
 396 }
 397
 398 static int event__process_kernel_mmap(event_t *self,
 399                         struct perf_session *session)
 400 {
 401         struct map *map;
 402         char kmmap_prefix[PATH_MAX];
 403         struct machine *machine;
 404         enum dso_kernel_type kernel_type;
 405         bool is_kernel_mmap;
 406
 407         machine = perf_session__findnew_machine(session, self->mmap.pid);
 408         if (!machine) {
 409                 pr_err("Can't find id %d's machine\n", self->mmap.pid);
 410                 goto out_problem;
 411         }
 412
 413         machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
 414         if (machine__is_host(machine))
 415                 kernel_type = DSO_TYPE_KERNEL;
 416         else
 417                 kernel_type = DSO_TYPE_GUEST_KERNEL;
 418
 419         is_kernel_mmap = memcmp(self->mmap.filename,
 420                                 kmmap_prefix,
 421                                 strlen(kmmap_prefix)) == 0;
 422         if (self->mmap.filename[0] == '/' ||
 423             (!is_kernel_mmap && self->mmap.filename[0] == '[')) {
 424
 425                 char short_module_name[1024];
 426                 char *name, *dot;
 427
 428                 if (self->mmap.filename[0] == '/') {
 429                         name = strrchr(self->mmap.filename, '/');
 430                         if (name == NULL)
 431                                 goto out_problem;
 432
 433                         ++name; /* skip / */
 434                         dot = strrchr(name, '.');
 435                         if (dot == NULL)
 436                                 goto out_problem;
 437                         snprintf(short_module_name, sizeof(short_module_name),
 438                                         "[%.*s]", (int)(dot - name), name);
 439                         strxfrchar(short_module_name, '-', '_');
 440                 } else
 441                         strcpy(short_module_name, self->mmap.filename);
 442
 443                 map = machine__new_module(machine, self->mmap.start,
 444                                           self->mmap.filename);
 445                 if (map == NULL)
 446                         goto out_problem;
 447
 448                 name = strdup(short_module_name);
 449                 if (name == NULL)
 450                         goto out_problem;
 451
 452                 map->dso->short_name = name;
 453                 map->dso->sname_alloc = 1;
 454                 map->end = map->start + self->mmap.len;
 455         } else if (is_kernel_mmap) {
 456                 const char *symbol_name = (self->mmap.filename +
 457                                 strlen(kmmap_prefix));
 458                 /*
 459                  * Should be there already, from the build-id table in
 460                  * the header.
 461                  */
 462                 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
 463                                                      kmmap_prefix);
 464                 if (kernel == NULL)
 465                         goto out_problem;
 466
 467                 kernel->kernel = kernel_type;
 468                 if (__machine__create_kernel_maps(machine, kernel) < 0)
 469                         goto out_problem;
 470
 471                 event_set_kernel_mmap_len(machine->vmlinux_maps, self);
 472                 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
 473                                                          symbol_name,
 474                                                          self->mmap.pgoff);
 475                 if (machine__is_default_guest(machine)) {
 476                         /*
 477                          * preload dso of guest kernel and modules
 478                          */
 479                         dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
 480                                   NULL);
 481                 }
 482         }
 483         return 0;
 484 out_problem:
 485         return -1;
 486 }
 487
 488 int event__process_mmap(event_t *self, struct perf_session *session)
 489 {
 490         struct machine *machine;
 491         struct thread *thread;
 492         struct map *map;
 493         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 494         int ret = 0;
 495
 496         dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
 497                         self->mmap.pid, self->mmap.tid, self->mmap.start,
 498                         self->mmap.len, self->mmap.pgoff, self->mmap.filename);
 499
 500         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 501             cpumode == PERF_RECORD_MISC_KERNEL) {
 502                 ret = event__process_kernel_mmap(self, session);
 503                 if (ret < 0)
 504                         goto out_problem;
 505                 return 0;
 506         }
 507
 508         machine = perf_session__find_host_machine(session);
 509         if (machine == NULL)
 510                 goto out_problem;
 511         thread = perf_session__findnew(session, self->mmap.pid);
 512         if (thread == NULL)
 513                 goto out_problem;
 514         map = map__new(&machine->user_dsos, self->mmap.start,
 515                         self->mmap.len, self->mmap.pgoff,
 516                         self->mmap.pid, self->mmap.filename,
 517                         MAP__FUNCTION);
 518         if (map == NULL)
 519                 goto out_problem;
 520
 521         thread__insert_map(thread, map);
 522         return 0;
 523
 524 out_problem:
 525         dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 526         return 0;
 527 }
 528
 529 int event__process_task(event_t *self, struct perf_session *session)
 530 {
 531         struct thread *thread = perf_session__findnew(session, self->fork.tid);
 532         struct thread *parent = perf_session__findnew(session, self->fork.ptid);
 533
 534         dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
 535                     self->fork.ppid, self->fork.ptid);
 536
 537         if (self->header.type == PERF_RECORD_EXIT) {
 538                 perf_session__remove_thread(session, thread);
 539                 return 0;
 540         }
 541
 542         if (thread == NULL || parent == NULL ||
 543             thread__fork(thread, parent) < 0) {
 544                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 545                 return -1;
 546         }
 547
 548         return 0;
 549 }
 550
 551 int event__process(event_t *event, struct perf_session *session)
 552 {
 553         switch (event->header.type) {
 554         case PERF_RECORD_COMM:
 555                 event__process_comm(event, session);
 556                 break;
 557         case PERF_RECORD_MMAP:
 558                 event__process_mmap(event, session);
 559                 break;
 560         case PERF_RECORD_FORK:
 561         case PERF_RECORD_EXIT:
 562                 event__process_task(event, session);
 563                 break;
 564         default:
 565                 break;
 566         }
 567
 568         return 0;
 569 }
 570
 571 void thread__find_addr_map(struct thread *self,
 572                            struct perf_session *session, u8 cpumode,
 573                            enum map_type type, pid_t pid, u64 addr,
 574                            struct addr_location *al)
 575 {
 576         struct map_groups *mg = &self->mg;
 577         struct machine *machine = NULL;
 578
 579         al->thread = self;
 580         al->addr = addr;
 581         al->cpumode = cpumode;
 582         al->filtered = false;
 583
 584         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 585                 al->level = 'k';
 586                 machine = perf_session__find_host_machine(session);
 587                 if (machine == NULL) {
 588                         al->map = NULL;
 589                         return;
 590                 }
 591                 mg = &machine->kmaps;
 592         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 593                 al->level = '.';
 594                 machine = perf_session__find_host_machine(session);
 595         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 596                 al->level = 'g';
 597                 machine = perf_session__find_machine(session, pid);
 598                 if (machine == NULL) {
 599                         al->map = NULL;
 600                         return;
 601                 }
 602                 mg = &machine->kmaps;
 603         } else {
 604                 /*
 605                  * 'u' means guest os user space.
 606                  * TODO: We don't support guest user space. Might support late.
 607                  */
 608                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 609                         al->level = 'u';
 610                 else
 611                         al->level = 'H';
 612                 al->map = NULL;
 613
 614                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 615                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 616                         !perf_guest)
 617                         al->filtered = true;
 618                 if ((cpumode == PERF_RECORD_MISC_USER ||
 619                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 620                         !perf_host)
 621                         al->filtered = true;
 622
 623                 return;
 624         }
 625 try_again:
 626         al->map = map_groups__find(mg, type, al->addr);
 627         if (al->map == NULL) {
 628                 /*
 629                  * If this is outside of all known maps, and is a negative
 630                  * address, try to look it up in the kernel dso, as it might be
 631                  * a vsyscall or vdso (which executes in user-mode).
 632                  *
 633                  * XXX This is nasty, we should have a symbol list in the
 634                  * "[vdso]" dso, but for now lets use the old trick of looking
 635                  * in the whole kernel symbol list.
 636                  */
 637                 if ((long long)al->addr < 0 &&
 638                     cpumode == PERF_RECORD_MISC_KERNEL &&
 639                     machine && mg != &machine->kmaps) {
 640                         mg = &machine->kmaps;
 641                         goto try_again;
 642                 }
 643         } else
 644                 al->addr = al->map->map_ip(al->map, al->addr);
 645 }
 646
 647 void thread__find_addr_location(struct thread *self,
 648                                 struct perf_session *session, u8 cpumode,
 649                                 enum map_type type, pid_t pid, u64 addr,
 650                                 struct addr_location *al,
 651                                 symbol_filter_t filter)
 652 {
 653         thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
 654         if (al->map != NULL)
 655                 al->sym = map__find_symbol(al->map, al->addr, filter);
 656         else
 657                 al->sym = NULL;
 658 }
 659
 660 static void dso__calc_col_width(struct dso *self, struct hists *hists)
 661 {
 662         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 663             (!symbol_conf.dso_list ||
 664              strlist__has_entry(symbol_conf.dso_list, self->name))) {
 665                 u16 slen = dso__name_len(self);
 666                 hists__new_col_len(hists, HISTC_DSO, slen);
 667         }
 668
 669         self->slen_calculated = 1;
 670 }
 671
 672 int event__preprocess_sample(const event_t *self, struct perf_session *session,
 673                              struct addr_location *al, struct sample_data *data,
 674                              symbol_filter_t filter)
 675 {
 676         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 677         struct thread *thread;
 678
 679         event__parse_sample(self, session->sample_type, data);
 680
 681         dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld cpu:%d\n",
 682                     self->header.misc, data->pid, data->tid, data->ip,
 683                     data->period, data->cpu);
 684
 685         if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
 686                 unsigned int i;
 687
 688                 dump_printf("... chain: nr:%Lu\n", data->callchain->nr);
 689
 690                 if (!ip_callchain__valid(data->callchain, self)) {
 691                         pr_debug("call-chain problem with event, "
 692                                  "skipping it.\n");
 693                         goto out_filtered;
 694                 }
 695
 696                 if (dump_trace) {
 697                         for (i = 0; i < data->callchain->nr; i++)
 698                                 dump_printf("..... %2d: %016Lx\n",
 699                                             i, data->callchain->ips[i]);
 700                 }
 701         }
 702         thread = perf_session__findnew(session, self->ip.pid);
 703         if (thread == NULL)
 704                 return -1;
 705
 706         if (symbol_conf.comm_list &&
 707             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 708                 goto out_filtered;
 709
 710         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 711         /*
 712          * Have we already created the kernel maps for the host machine?
 713          *
 714          * This should have happened earlier, when we processed the kernel MMAP
 715          * events, but for older perf.data files there was no such thing, so do
 716          * it now.
 717          */
 718         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 719             session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
 720                 machine__create_kernel_maps(&session->host_machine);
 721
 722         thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 723                               self->ip.pid, self->ip.ip, al);
 724         dump_printf(" ...... dso: %s\n",
 725                     al->map ? al->map->dso->long_name :
 726                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 727         al->sym = NULL;
 728         al->cpu = data->cpu;
 729
 730         if (al->map) {
 731                 if (symbol_conf.dso_list &&
 732                     (!al->map || !al->map->dso ||
 733                      !(strlist__has_entry(symbol_conf.dso_list,
 734                                           al->map->dso->short_name) ||
 735                        (al->map->dso->short_name != al->map->dso->long_name &&
 736                         strlist__has_entry(symbol_conf.dso_list,
 737                                            al->map->dso->long_name)))))
 738                         goto out_filtered;
 739                 /*
 740                  * We have to do this here as we may have a dso with no symbol
 741                  * hit that has a name longer than the ones with symbols
 742                  * sampled.
 743                  */
 744                 if (!sort_dso.elide && !al->map->dso->slen_calculated)
 745                         dso__calc_col_width(al->map->dso, &session->hists);
 746
 747                 al->sym = map__find_symbol(al->map, al->addr, filter);
 748         } else {
 749                 const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
 750
 751                 if (hists__col_len(&session->hists, HISTC_DSO) < unresolved_col_width &&
 752                     !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 753                     !symbol_conf.dso_list)
 754                         hists__set_col_len(&session->hists, HISTC_DSO,
 755                                            unresolved_col_width);
 756         }
 757
 758         if (symbol_conf.sym_list && al->sym &&
 759             !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
 760                 goto out_filtered;
 761
 762         return 0;
 763
 764 out_filtered:
 765         al->filtered = true;
 766         return 0;
 767 }
 768
 769 int event__parse_sample(const event_t *event, u64 type, struct sample_data *data)
 770 {
 771         const u64 *array = event->sample.array;
 772
 773         if (type & PERF_SAMPLE_IP) {
 774                 data->ip = event->ip.ip;
 775                 array++;
 776         }
 777
 778         if (type & PERF_SAMPLE_TID) {
 779                 u32 *p = (u32 *)array;
 780                 data->pid = p[0];
 781                 data->tid = p[1];
 782                 array++;
 783         }
 784
 785         if (type & PERF_SAMPLE_TIME) {
 786                 data->time = *array;
 787                 array++;
 788         }
 789
 790         if (type & PERF_SAMPLE_ADDR) {
 791                 data->addr = *array;
 792                 array++;
 793         }
 794
 795         data->id = -1ULL;
 796         if (type & PERF_SAMPLE_ID) {
 797                 data->id = *array;
 798                 array++;
 799         }
 800
 801         if (type & PERF_SAMPLE_STREAM_ID) {
 802                 data->stream_id = *array;
 803                 array++;
 804         }
 805
 806         if (type & PERF_SAMPLE_CPU) {
 807                 u32 *p = (u32 *)array;
 808                 data->cpu = *p;
 809                 array++;
 810         } else
 811                 data->cpu = -1;
 812
 813         if (type & PERF_SAMPLE_PERIOD) {
 814                 data->period = *array;
 815                 array++;
 816         }
 817
 818         if (type & PERF_SAMPLE_READ) {
 819                 pr_debug("PERF_SAMPLE_READ is unsuported for now\n");
 820                 return -1;
 821         }
 822
 823         if (type & PERF_SAMPLE_CALLCHAIN) {
 824                 data->callchain = (struct ip_callchain *)array;
 825                 array += 1 + data->callchain->nr;
 826         }
 827
 828         if (type & PERF_SAMPLE_RAW) {
 829                 u32 *p = (u32 *)array;
 830                 data->raw_size = *p;
 831                 p++;
 832                 data->raw_data = p;
 833         }
 834
 835         return 0;
 836 }