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 #include "thread_map.h"
  10
  11 static const char *perf_event__names[] = {
  12         [0]                                     = "TOTAL",
  13         [PERF_RECORD_MMAP]                      = "MMAP",
  14         [PERF_RECORD_LOST]                      = "LOST",
  15         [PERF_RECORD_COMM]                      = "COMM",
  16         [PERF_RECORD_EXIT]                      = "EXIT",
  17         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  18         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  19         [PERF_RECORD_FORK]                      = "FORK",
  20         [PERF_RECORD_READ]                      = "READ",
  21         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  22         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  23         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  24         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  25         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  26         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  27 };
  28
  29 const char *perf_event__name(unsigned int id)
  30 {
  31         if (id >= ARRAY_SIZE(perf_event__names))
  32                 return "INVALID";
  33         if (!perf_event__names[id])
  34                 return "UNKNOWN";
  35         return perf_event__names[id];
  36 }
  37
  38 static struct perf_sample synth_sample = {
  39         .pid       = -1,
  40         .tid       = -1,
  41         .time      = -1,
  42         .stream_id = -1,
  43         .cpu       = -1,
  44         .period    = 1,
  45 };
  46
  47 static pid_t perf_event__synthesize_comm(struct perf_event_ops *ops,
  48                                          union perf_event *event, pid_t pid,
  49                                          int full, perf_event__handler_t process,
  50                                          struct perf_session *session)
  51 {
  52         char filename[PATH_MAX];
  53         char bf[BUFSIZ];
  54         FILE *fp;
  55         size_t size = 0;
  56         DIR *tasks;
  57         struct dirent dirent, *next;
  58         pid_t tgid = 0;
  59
  60         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  61
  62         fp = fopen(filename, "r");
  63         if (fp == NULL) {
  64 out_race:
  65                 /*
  66                  * We raced with a task exiting - just return:
  67                  */
  68                 pr_debug("couldn't open %s\n", filename);
  69                 return 0;
  70         }
  71
  72         memset(&event->comm, 0, sizeof(event->comm));
  73
  74         while (!event->comm.comm[0] || !event->comm.pid) {
  75                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  76                         pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
  77                         goto out;
  78                 }
  79
  80                 if (memcmp(bf, "Name:", 5) == 0) {
  81                         char *name = bf + 5;
  82                         while (*name && isspace(*name))
  83                                 ++name;
  84                         size = strlen(name) - 1;
  85                         memcpy(event->comm.comm, name, size++);
  86                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  87                         char *tgids = bf + 5;
  88                         while (*tgids && isspace(*tgids))
  89                                 ++tgids;
  90                         tgid = event->comm.pid = atoi(tgids);
  91                 }
  92         }
  93
  94         event->comm.header.type = PERF_RECORD_COMM;
  95         size = ALIGN(size, sizeof(u64));
  96         memset(event->comm.comm + size, 0, session->id_hdr_size);
  97         event->comm.header.size = (sizeof(event->comm) -
  98                                 (sizeof(event->comm.comm) - size) +
  99                                 session->id_hdr_size);
 100         if (!full) {
 101                 event->comm.tid = pid;
 102
 103                 process(ops, event, &synth_sample, session);
 104                 goto out;
 105         }
 106
 107         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
 108
 109         tasks = opendir(filename);
 110         if (tasks == NULL)
 111                 goto out_race;
 112
 113         while (!readdir_r(tasks, &dirent, &next) && next) {
 114                 char *end;
 115                 pid = strtol(dirent.d_name, &end, 10);
 116                 if (*end)
 117                         continue;
 118
 119                 event->comm.tid = pid;
 120
 121                 process(ops, event, &synth_sample, session);
 122         }
 123
 124         closedir(tasks);
 125 out:
 126         fclose(fp);
 127
 128         return tgid;
 129 }
 130
 131 static int perf_event__synthesize_mmap_events(struct perf_event_ops *ops,
 132                                               union perf_event *event,
 133                                               pid_t pid, pid_t tgid,
 134                                               perf_event__handler_t process,
 135                                               struct perf_session *session)
 136 {
 137         char filename[PATH_MAX];
 138         FILE *fp;
 139
 140         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 141
 142         fp = fopen(filename, "r");
 143         if (fp == NULL) {
 144                 /*
 145                  * We raced with a task exiting - just return:
 146                  */
 147                 pr_debug("couldn't open %s\n", filename);
 148                 return -1;
 149         }
 150
 151         event->header.type = PERF_RECORD_MMAP;
 152         /*
 153          * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 154          */
 155         event->header.misc = PERF_RECORD_MISC_USER;
 156
 157         while (1) {
 158                 char bf[BUFSIZ], *pbf = bf;
 159                 int n;
 160                 size_t size;
 161                 if (fgets(bf, sizeof(bf), fp) == NULL)
 162                         break;
 163
 164                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 165                 n = hex2u64(pbf, &event->mmap.start);
 166                 if (n < 0)
 167                         continue;
 168                 pbf += n + 1;
 169                 n = hex2u64(pbf, &event->mmap.len);
 170                 if (n < 0)
 171                         continue;
 172                 pbf += n + 3;
 173                 if (*pbf == 'x') { /* vm_exec */
 174                         char anonstr[] = "//anon\n";
 175                         char *execname = strchr(bf, '/');
 176
 177                         /* Catch VDSO */
 178                         if (execname == NULL)
 179                                 execname = strstr(bf, "[vdso]");
 180
 181                         /* Catch anonymous mmaps */
 182                         if ((execname == NULL) && !strstr(bf, "["))
 183                                 execname = anonstr;
 184
 185                         if (execname == NULL)
 186                                 continue;
 187
 188                         pbf += 3;
 189                         n = hex2u64(pbf, &event->mmap.pgoff);
 190
 191                         size = strlen(execname);
 192                         execname[size - 1] = '\0'; /* Remove \n */
 193                         memcpy(event->mmap.filename, execname, size);
 194                         size = ALIGN(size, sizeof(u64));
 195                         event->mmap.len -= event->mmap.start;
 196                         event->mmap.header.size = (sizeof(event->mmap) -
 197                                                 (sizeof(event->mmap.filename) - size));
 198                         memset(event->mmap.filename + size, 0, session->id_hdr_size);
 199                         event->mmap.header.size += session->id_hdr_size;
 200                         event->mmap.pid = tgid;
 201                         event->mmap.tid = pid;
 202
 203                         process(ops, event, &synth_sample, session);
 204                 }
 205         }
 206
 207         fclose(fp);
 208         return 0;
 209 }
 210
 211 int perf_event__synthesize_modules(struct perf_event_ops *ops,
 212                                    perf_event__handler_t process,
 213                                    struct perf_session *session,
 214                                    struct machine *machine)
 215 {
 216         struct rb_node *nd;
 217         struct map_groups *kmaps = &machine->kmaps;
 218         union perf_event *event = zalloc((sizeof(event->mmap) +
 219                                           session->id_hdr_size));
 220         if (event == NULL) {
 221                 pr_debug("Not enough memory synthesizing mmap event "
 222                          "for kernel modules\n");
 223                 return -1;
 224         }
 225
 226         event->header.type = PERF_RECORD_MMAP;
 227
 228         /*
 229          * kernel uses 0 for user space maps, see kernel/perf_event.c
 230          * __perf_event_mmap
 231          */
 232         if (machine__is_host(machine))
 233                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 234         else
 235                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 236
 237         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 238              nd; nd = rb_next(nd)) {
 239                 size_t size;
 240                 struct map *pos = rb_entry(nd, struct map, rb_node);
 241
 242                 if (pos->dso->kernel)
 243                         continue;
 244
 245                 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 246                 event->mmap.header.type = PERF_RECORD_MMAP;
 247                 event->mmap.header.size = (sizeof(event->mmap) -
 248                                         (sizeof(event->mmap.filename) - size));
 249                 memset(event->mmap.filename + size, 0, session->id_hdr_size);
 250                 event->mmap.header.size += session->id_hdr_size;
 251                 event->mmap.start = pos->start;
 252                 event->mmap.len   = pos->end - pos->start;
 253                 event->mmap.pid   = machine->pid;
 254
 255                 memcpy(event->mmap.filename, pos->dso->long_name,
 256                        pos->dso->long_name_len + 1);
 257                 process(ops, event, &synth_sample, session);
 258         }
 259
 260         free(event);
 261         return 0;
 262 }
 263
 264 static int __event__synthesize_thread(union perf_event *comm_event,
 265                                       union perf_event *mmap_event,
 266                                       pid_t pid, perf_event__handler_t process,
 267                                       struct perf_event_ops *ops,
 268                                       struct perf_session *session)
 269 {
 270         pid_t tgid = perf_event__synthesize_comm(ops, comm_event, pid, 1, process,
 271                                             session);
 272         if (tgid == -1)
 273                 return -1;
 274         return perf_event__synthesize_mmap_events(ops, mmap_event, pid, tgid,
 275                                              process, session);
 276 }
 277
 278 int perf_event__synthesize_thread_map(struct perf_event_ops *ops,
 279                                       struct thread_map *threads,
 280                                       perf_event__handler_t process,
 281                                       struct perf_session *session)
 282 {
 283         union perf_event *comm_event, *mmap_event;
 284         int err = -1, thread;
 285
 286         comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
 287         if (comm_event == NULL)
 288                 goto out;
 289
 290         mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
 291         if (mmap_event == NULL)
 292                 goto out_free_comm;
 293
 294         err = 0;
 295         for (thread = 0; thread < threads->nr; ++thread) {
 296                 if (__event__synthesize_thread(comm_event, mmap_event,
 297                                                threads->map[thread],
 298                                                process, ops, session)) {
 299                         err = -1;
 300                         break;
 301                 }
 302         }
 303         free(mmap_event);
 304 out_free_comm:
 305         free(comm_event);
 306 out:
 307         return err;
 308 }
 309
 310 int perf_event__synthesize_threads(struct perf_event_ops *ops,
 311                                    perf_event__handler_t process,
 312                                    struct perf_session *session)
 313 {
 314         DIR *proc;
 315         struct dirent dirent, *next;
 316         union perf_event *comm_event, *mmap_event;
 317         int err = -1;
 318
 319         comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
 320         if (comm_event == NULL)
 321                 goto out;
 322
 323         mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
 324         if (mmap_event == NULL)
 325                 goto out_free_comm;
 326
 327         proc = opendir("/proc");
 328         if (proc == NULL)
 329                 goto out_free_mmap;
 330
 331         while (!readdir_r(proc, &dirent, &next) && next) {
 332                 char *end;
 333                 pid_t pid = strtol(dirent.d_name, &end, 10);
 334
 335                 if (*end) /* only interested in proper numerical dirents */
 336                         continue;
 337
 338                 __event__synthesize_thread(comm_event, mmap_event, pid,
 339                                            process, ops, session);
 340         }
 341
 342         closedir(proc);
 343         err = 0;
 344 out_free_mmap:
 345         free(mmap_event);
 346 out_free_comm:
 347         free(comm_event);
 348 out:
 349         return err;
 350 }
 351
 352 struct process_symbol_args {
 353         const char *name;
 354         u64        start;
 355 };
 356
 357 static int find_symbol_cb(void *arg, const char *name, char type,
 358                           u64 start, u64 end __used)
 359 {
 360         struct process_symbol_args *args = arg;
 361
 362         /*
 363          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 364          * an 'A' to the same address as "_stext".
 365          */
 366         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 367               type == 'A') || strcmp(name, args->name))
 368                 return 0;
 369
 370         args->start = start;
 371         return 1;
 372 }
 373
 374 int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 375                                        perf_event__handler_t process,
 376                                        struct perf_session *session,
 377                                        struct machine *machine,
 378                                        const char *symbol_name)
 379 {
 380         size_t size;
 381         const char *filename, *mmap_name;
 382         char path[PATH_MAX];
 383         char name_buff[PATH_MAX];
 384         struct map *map;
 385         int err;
 386         /*
 387          * We should get this from /sys/kernel/sections/.text, but till that is
 388          * available use this, and after it is use this as a fallback for older
 389          * kernels.
 390          */
 391         struct process_symbol_args args = { .name = symbol_name, };
 392         union perf_event *event = zalloc((sizeof(event->mmap) +
 393                                           session->id_hdr_size));
 394         if (event == NULL) {
 395                 pr_debug("Not enough memory synthesizing mmap event "
 396                          "for kernel modules\n");
 397                 return -1;
 398         }
 399
 400         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 401         if (machine__is_host(machine)) {
 402                 /*
 403                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 404                  * see kernel/perf_event.c __perf_event_mmap
 405                  */
 406                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 407                 filename = "/proc/kallsyms";
 408         } else {
 409                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 410                 if (machine__is_default_guest(machine))
 411                         filename = (char *) symbol_conf.default_guest_kallsyms;
 412                 else {
 413                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 414                         filename = path;
 415                 }
 416         }
 417
 418         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
 419                 return -ENOENT;
 420
 421         map = machine->vmlinux_maps[MAP__FUNCTION];
 422         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 423                         "%s%s", mmap_name, symbol_name) + 1;
 424         size = ALIGN(size, sizeof(u64));
 425         event->mmap.header.type = PERF_RECORD_MMAP;
 426         event->mmap.header.size = (sizeof(event->mmap) -
 427                         (sizeof(event->mmap.filename) - size) + session->id_hdr_size);
 428         event->mmap.pgoff = args.start;
 429         event->mmap.start = map->start;
 430         event->mmap.len   = map->end - event->mmap.start;
 431         event->mmap.pid   = machine->pid;
 432
 433         err = process(ops, event, &synth_sample, session);
 434         free(event);
 435
 436         return err;
 437 }
 438
 439 int perf_event__process_comm(struct perf_event_ops *ops __used,
 440                              union perf_event *event,
 441                              struct perf_sample *sample __used,
 442                              struct perf_session *session)
 443 {
 444         struct thread *thread = perf_session__findnew(session, event->comm.tid);
 445
 446         dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
 447
 448         if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
 449                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 450                 return -1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 int perf_event__process_lost(struct perf_event_ops *ops __used,
 457                              union perf_event *event,
 458                              struct perf_sample *sample __used,
 459                              struct perf_session *session)
 460 {
 461         dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
 462                     event->lost.id, event->lost.lost);
 463         session->hists.stats.total_lost += event->lost.lost;
 464         return 0;
 465 }
 466
 467 static void perf_event__set_kernel_mmap_len(union perf_event *event,
 468                                             struct map **maps)
 469 {
 470         maps[MAP__FUNCTION]->start = event->mmap.start;
 471         maps[MAP__FUNCTION]->end   = event->mmap.start + event->mmap.len;
 472         /*
 473          * Be a bit paranoid here, some perf.data file came with
 474          * a zero sized synthesized MMAP event for the kernel.
 475          */
 476         if (maps[MAP__FUNCTION]->end == 0)
 477                 maps[MAP__FUNCTION]->end = ~0ULL;
 478 }
 479
 480 static int perf_event__process_kernel_mmap(struct perf_event_ops *ops __used,
 481                                            union perf_event *event,
 482                                            struct perf_session *session)
 483 {
 484         struct map *map;
 485         char kmmap_prefix[PATH_MAX];
 486         struct machine *machine;
 487         enum dso_kernel_type kernel_type;
 488         bool is_kernel_mmap;
 489
 490         machine = perf_session__findnew_machine(session, event->mmap.pid);
 491         if (!machine) {
 492                 pr_err("Can't find id %d's machine\n", event->mmap.pid);
 493                 goto out_problem;
 494         }
 495
 496         machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
 497         if (machine__is_host(machine))
 498                 kernel_type = DSO_TYPE_KERNEL;
 499         else
 500                 kernel_type = DSO_TYPE_GUEST_KERNEL;
 501
 502         is_kernel_mmap = memcmp(event->mmap.filename,
 503                                 kmmap_prefix,
 504                                 strlen(kmmap_prefix)) == 0;
 505         if (event->mmap.filename[0] == '/' ||
 506             (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
 507
 508                 char short_module_name[1024];
 509                 char *name, *dot;
 510
 511                 if (event->mmap.filename[0] == '/') {
 512                         name = strrchr(event->mmap.filename, '/');
 513                         if (name == NULL)
 514                                 goto out_problem;
 515
 516                         ++name; /* skip / */
 517                         dot = strrchr(name, '.');
 518                         if (dot == NULL)
 519                                 goto out_problem;
 520                         snprintf(short_module_name, sizeof(short_module_name),
 521                                         "[%.*s]", (int)(dot - name), name);
 522                         strxfrchar(short_module_name, '-', '_');
 523                 } else
 524                         strcpy(short_module_name, event->mmap.filename);
 525
 526                 map = machine__new_module(machine, event->mmap.start,
 527                                           event->mmap.filename);
 528                 if (map == NULL)
 529                         goto out_problem;
 530
 531                 name = strdup(short_module_name);
 532                 if (name == NULL)
 533                         goto out_problem;
 534
 535                 map->dso->short_name = name;
 536                 map->dso->sname_alloc = 1;
 537                 map->end = map->start + event->mmap.len;
 538         } else if (is_kernel_mmap) {
 539                 const char *symbol_name = (event->mmap.filename +
 540                                 strlen(kmmap_prefix));
 541                 /*
 542                  * Should be there already, from the build-id table in
 543                  * the header.
 544                  */
 545                 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
 546                                                      kmmap_prefix);
 547                 if (kernel == NULL)
 548                         goto out_problem;
 549
 550                 kernel->kernel = kernel_type;
 551                 if (__machine__create_kernel_maps(machine, kernel) < 0)
 552                         goto out_problem;
 553
 554                 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
 555
 556                 /*
 557                  * Avoid using a zero address (kptr_restrict) for the ref reloc
 558                  * symbol. Effectively having zero here means that at record
 559                  * time /proc/sys/kernel/kptr_restrict was non zero.
 560                  */
 561                 if (event->mmap.pgoff != 0) {
 562                         perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
 563                                                                  symbol_name,
 564                                                                  event->mmap.pgoff);
 565                 }
 566
 567                 if (machine__is_default_guest(machine)) {
 568                         /*
 569                          * preload dso of guest kernel and modules
 570                          */
 571                         dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
 572                                   NULL);
 573                 }
 574         }
 575         return 0;
 576 out_problem:
 577         return -1;
 578 }
 579
 580 int perf_event__process_mmap(struct perf_event_ops *ops,
 581                              union perf_event *event,
 582                              struct perf_sample *sample __used,
 583                              struct perf_session *session)
 584 {
 585         struct machine *machine;
 586         struct thread *thread;
 587         struct map *map;
 588         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 589         int ret = 0;
 590
 591         dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
 592                         event->mmap.pid, event->mmap.tid, event->mmap.start,
 593                         event->mmap.len, event->mmap.pgoff, event->mmap.filename);
 594
 595         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 596             cpumode == PERF_RECORD_MISC_KERNEL) {
 597                 ret = perf_event__process_kernel_mmap(ops, event, session);
 598                 if (ret < 0)
 599                         goto out_problem;
 600                 return 0;
 601         }
 602
 603         machine = perf_session__find_host_machine(session);
 604         if (machine == NULL)
 605                 goto out_problem;
 606         thread = perf_session__findnew(session, event->mmap.pid);
 607         if (thread == NULL)
 608                 goto out_problem;
 609         map = map__new(&machine->user_dsos, event->mmap.start,
 610                         event->mmap.len, event->mmap.pgoff,
 611                         event->mmap.pid, event->mmap.filename,
 612                         MAP__FUNCTION);
 613         if (map == NULL)
 614                 goto out_problem;
 615
 616         thread__insert_map(thread, map);
 617         return 0;
 618
 619 out_problem:
 620         dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 621         return 0;
 622 }
 623
 624 int perf_event__process_task(struct perf_event_ops *ops __used,
 625                              union perf_event *event,
 626                              struct perf_sample *sample __used,
 627                              struct perf_session *session)
 628 {
 629         struct thread *thread = perf_session__findnew(session, event->fork.tid);
 630         struct thread *parent = perf_session__findnew(session, event->fork.ptid);
 631
 632         dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
 633                     event->fork.ppid, event->fork.ptid);
 634
 635         if (event->header.type == PERF_RECORD_EXIT) {
 636                 perf_session__remove_thread(session, thread);
 637                 return 0;
 638         }
 639
 640         if (thread == NULL || parent == NULL ||
 641             thread__fork(thread, parent) < 0) {
 642                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 643                 return -1;
 644         }
 645
 646         return 0;
 647 }
 648
 649 int perf_event__process(struct perf_event_ops *ops, union perf_event *event,
 650                         struct perf_sample *sample, struct perf_session *session)
 651 {
 652         switch (event->header.type) {
 653         case PERF_RECORD_COMM:
 654                 perf_event__process_comm(ops, event, sample, session);
 655                 break;
 656         case PERF_RECORD_MMAP:
 657                 perf_event__process_mmap(ops, event, sample, session);
 658                 break;
 659         case PERF_RECORD_FORK:
 660         case PERF_RECORD_EXIT:
 661                 perf_event__process_task(ops, event, sample, session);
 662                 break;
 663         case PERF_RECORD_LOST:
 664                 perf_event__process_lost(ops, event, sample, session);
 665         default:
 666                 break;
 667         }
 668
 669         return 0;
 670 }
 671
 672 void thread__find_addr_map(struct thread *self,
 673                            struct perf_session *session, u8 cpumode,
 674                            enum map_type type, pid_t pid, u64 addr,
 675                            struct addr_location *al)
 676 {
 677         struct map_groups *mg = &self->mg;
 678         struct machine *machine = NULL;
 679
 680         al->thread = self;
 681         al->addr = addr;
 682         al->cpumode = cpumode;
 683         al->filtered = false;
 684
 685         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 686                 al->level = 'k';
 687                 machine = perf_session__find_host_machine(session);
 688                 if (machine == NULL) {
 689                         al->map = NULL;
 690                         return;
 691                 }
 692                 mg = &machine->kmaps;
 693         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 694                 al->level = '.';
 695                 machine = perf_session__find_host_machine(session);
 696         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 697                 al->level = 'g';
 698                 machine = perf_session__find_machine(session, pid);
 699                 if (machine == NULL) {
 700                         al->map = NULL;
 701                         return;
 702                 }
 703                 mg = &machine->kmaps;
 704         } else {
 705                 /*
 706                  * 'u' means guest os user space.
 707                  * TODO: We don't support guest user space. Might support late.
 708                  */
 709                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 710                         al->level = 'u';
 711                 else
 712                         al->level = 'H';
 713                 al->map = NULL;
 714
 715                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 716                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 717                         !perf_guest)
 718                         al->filtered = true;
 719                 if ((cpumode == PERF_RECORD_MISC_USER ||
 720                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 721                         !perf_host)
 722                         al->filtered = true;
 723
 724                 return;
 725         }
 726 try_again:
 727         al->map = map_groups__find(mg, type, al->addr);
 728         if (al->map == NULL) {
 729                 /*
 730                  * If this is outside of all known maps, and is a negative
 731                  * address, try to look it up in the kernel dso, as it might be
 732                  * a vsyscall or vdso (which executes in user-mode).
 733                  *
 734                  * XXX This is nasty, we should have a symbol list in the
 735                  * "[vdso]" dso, but for now lets use the old trick of looking
 736                  * in the whole kernel symbol list.
 737                  */
 738                 if ((long long)al->addr < 0 &&
 739                     cpumode == PERF_RECORD_MISC_USER &&
 740                     machine && mg != &machine->kmaps) {
 741                         mg = &machine->kmaps;
 742                         goto try_again;
 743                 }
 744         } else
 745                 al->addr = al->map->map_ip(al->map, al->addr);
 746 }
 747
 748 void thread__find_addr_location(struct thread *self,
 749                                 struct perf_session *session, u8 cpumode,
 750                                 enum map_type type, pid_t pid, u64 addr,
 751                                 struct addr_location *al,
 752                                 symbol_filter_t filter)
 753 {
 754         thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
 755         if (al->map != NULL)
 756                 al->sym = map__find_symbol(al->map, al->addr, filter);
 757         else
 758                 al->sym = NULL;
 759 }
 760
 761 int perf_event__preprocess_sample(const union perf_event *event,
 762                                   struct perf_session *session,
 763                                   struct addr_location *al,
 764                                   struct perf_sample *sample,
 765                                   symbol_filter_t filter)
 766 {
 767         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 768         struct thread *thread = perf_session__findnew(session, event->ip.pid);
 769
 770         if (thread == NULL)
 771                 return -1;
 772
 773         if (symbol_conf.comm_list &&
 774             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 775                 goto out_filtered;
 776
 777         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 778         /*
 779          * Have we already created the kernel maps for the host machine?
 780          *
 781          * This should have happened earlier, when we processed the kernel MMAP
 782          * events, but for older perf.data files there was no such thing, so do
 783          * it now.
 784          */
 785         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 786             session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
 787                 machine__create_kernel_maps(&session->host_machine);
 788
 789         thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 790                               event->ip.pid, event->ip.ip, al);
 791         dump_printf(" ...... dso: %s\n",
 792                     al->map ? al->map->dso->long_name :
 793                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 794         al->sym = NULL;
 795         al->cpu = sample->cpu;
 796
 797         if (al->map) {
 798                 if (symbol_conf.dso_list &&
 799                     (!al->map || !al->map->dso ||
 800                      !(strlist__has_entry(symbol_conf.dso_list,
 801                                           al->map->dso->short_name) ||
 802                        (al->map->dso->short_name != al->map->dso->long_name &&
 803                         strlist__has_entry(symbol_conf.dso_list,
 804                                            al->map->dso->long_name)))))
 805                         goto out_filtered;
 806
 807                 al->sym = map__find_symbol(al->map, al->addr, filter);
 808         }
 809
 810         if (symbol_conf.sym_list && al->sym &&
 811             !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
 812                 goto out_filtered;
 813
 814         return 0;
 815
 816 out_filtered:
 817         al->filtered = true;
 818         return 0;
 819 }