tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include <sys/mman.h>
   3 #include "event.h"
   4 #include "debug.h"
   5 #include "hist.h"
   6 #include "machine.h"
   7 #include "sort.h"
   8 #include "string.h"
   9 #include "strlist.h"
  10 #include "thread.h"
  11 #include "thread_map.h"
  12 #include "symbol/kallsyms.h"
  13 #include "asm/bug.h"
  14 #include "stat.h"
  15
  16 static const char *perf_event__names[] = {
  17         [0]                                     = "TOTAL",
  18         [PERF_RECORD_MMAP]                      = "MMAP",
  19         [PERF_RECORD_MMAP2]                     = "MMAP2",
  20         [PERF_RECORD_LOST]                      = "LOST",
  21         [PERF_RECORD_COMM]                      = "COMM",
  22         [PERF_RECORD_EXIT]                      = "EXIT",
  23         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  24         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  25         [PERF_RECORD_FORK]                      = "FORK",
  26         [PERF_RECORD_READ]                      = "READ",
  27         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  28         [PERF_RECORD_AUX]                       = "AUX",
  29         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  30         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  31         [PERF_RECORD_SWITCH]                    = "SWITCH",
  32         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  33         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  34         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  35         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  36         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  37         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  38         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  39         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  40         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  41         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  42         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  43         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  44         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  45         [PERF_RECORD_STAT]                      = "STAT",
  46         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  47         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  48 };
  49
  50 const char *perf_event__name(unsigned int id)
  51 {
  52         if (id >= ARRAY_SIZE(perf_event__names))
  53                 return "INVALID";
  54         if (!perf_event__names[id])
  55                 return "UNKNOWN";
  56         return perf_event__names[id];
  57 }
  58
  59 static int perf_tool__process_synth_event(struct perf_tool *tool,
  60                                           union perf_event *event,
  61                                           struct machine *machine,
  62                                           perf_event__handler_t process)
  63 {
  64         struct perf_sample synth_sample = {
  65         .pid       = -1,
  66         .tid       = -1,
  67         .time      = -1,
  68         .stream_id = -1,
  69         .cpu       = -1,
  70         .period    = 1,
  71         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
  72         };
  73
  74         return process(tool, event, &synth_sample, machine);
  75 };
  76
  77 /*
  78  * Assumes that the first 4095 bytes of /proc/pid/stat contains
  79  * the comm, tgid and ppid.
  80  */
  81 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
  82                                     pid_t *tgid, pid_t *ppid)
  83 {
  84         char filename[PATH_MAX];
  85         char bf[4096];
  86         int fd;
  87         size_t size = 0;
  88         ssize_t n;
  89         char *nl, *name, *tgids, *ppids;
  90
  91         *tgid = -1;
  92         *ppid = -1;
  93
  94         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  95
  96         fd = open(filename, O_RDONLY);
  97         if (fd < 0) {
  98                 pr_debug("couldn't open %s\n", filename);
  99                 return -1;
 100         }
 101
 102         n = read(fd, bf, sizeof(bf) - 1);
 103         close(fd);
 104         if (n <= 0) {
 105                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 106                            pid);
 107                 return -1;
 108         }
 109         bf[n] = '\0';
 110
 111         name = strstr(bf, "Name:");
 112         tgids = strstr(bf, "Tgid:");
 113         ppids = strstr(bf, "PPid:");
 114
 115         if (name) {
 116                 name += 5;  /* strlen("Name:") */
 117
 118                 while (*name && isspace(*name))
 119                         ++name;
 120
 121                 nl = strchr(name, '\n');
 122                 if (nl)
 123                         *nl = '\0';
 124
 125                 size = strlen(name);
 126                 if (size >= len)
 127                         size = len - 1;
 128                 memcpy(comm, name, size);
 129                 comm[size] = '\0';
 130         } else {
 131                 pr_debug("Name: string not found for pid %d\n", pid);
 132         }
 133
 134         if (tgids) {
 135                 tgids += 5;  /* strlen("Tgid:") */
 136                 *tgid = atoi(tgids);
 137         } else {
 138                 pr_debug("Tgid: string not found for pid %d\n", pid);
 139         }
 140
 141         if (ppids) {
 142                 ppids += 5;  /* strlen("PPid:") */
 143                 *ppid = atoi(ppids);
 144         } else {
 145                 pr_debug("PPid: string not found for pid %d\n", pid);
 146         }
 147
 148         return 0;
 149 }
 150
 151 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 152                                     struct machine *machine,
 153                                     pid_t *tgid, pid_t *ppid)
 154 {
 155         size_t size;
 156
 157         *ppid = -1;
 158
 159         memset(&event->comm, 0, sizeof(event->comm));
 160
 161         if (machine__is_host(machine)) {
 162                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 163                                              sizeof(event->comm.comm),
 164                                              tgid, ppid) != 0) {
 165                         return -1;
 166                 }
 167         } else {
 168                 *tgid = machine->pid;
 169         }
 170
 171         if (*tgid < 0)
 172                 return -1;
 173
 174         event->comm.pid = *tgid;
 175         event->comm.header.type = PERF_RECORD_COMM;
 176
 177         size = strlen(event->comm.comm) + 1;
 178         size = PERF_ALIGN(size, sizeof(u64));
 179         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 180         event->comm.header.size = (sizeof(event->comm) -
 181                                 (sizeof(event->comm.comm) - size) +
 182                                 machine->id_hdr_size);
 183         event->comm.tid = pid;
 184
 185         return 0;
 186 }
 187
 188 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 189                                          union perf_event *event, pid_t pid,
 190                                          perf_event__handler_t process,
 191                                          struct machine *machine)
 192 {
 193         pid_t tgid, ppid;
 194
 195         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 196                 return -1;
 197
 198         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 199                 return -1;
 200
 201         return tgid;
 202 }
 203
 204 static int perf_event__synthesize_fork(struct perf_tool *tool,
 205                                        union perf_event *event,
 206                                        pid_t pid, pid_t tgid, pid_t ppid,
 207                                        perf_event__handler_t process,
 208                                        struct machine *machine)
 209 {
 210         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 211
 212         /*
 213          * for main thread set parent to ppid from status file. For other
 214          * threads set parent pid to main thread. ie., assume main thread
 215          * spawns all threads in a process
 216         */
 217         if (tgid == pid) {
 218                 event->fork.ppid = ppid;
 219                 event->fork.ptid = ppid;
 220         } else {
 221                 event->fork.ppid = tgid;
 222                 event->fork.ptid = tgid;
 223         }
 224         event->fork.pid  = tgid;
 225         event->fork.tid  = pid;
 226         event->fork.header.type = PERF_RECORD_FORK;
 227
 228         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 229
 230         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 231                 return -1;
 232
 233         return 0;
 234 }
 235
 236 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 237                                        union perf_event *event,
 238                                        pid_t pid, pid_t tgid,
 239                                        perf_event__handler_t process,
 240                                        struct machine *machine,
 241                                        bool mmap_data,
 242                                        unsigned int proc_map_timeout)
 243 {
 244         char filename[PATH_MAX];
 245         FILE *fp;
 246         unsigned long long t;
 247         bool truncation = false;
 248         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 249         int rc = 0;
 250
 251         if (machine__is_default_guest(machine))
 252                 return 0;
 253
 254         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 255                  machine->root_dir, pid);
 256
 257         fp = fopen(filename, "r");
 258         if (fp == NULL) {
 259                 /*
 260                  * We raced with a task exiting - just return:
 261                  */
 262                 pr_debug("couldn't open %s\n", filename);
 263                 return -1;
 264         }
 265
 266         event->header.type = PERF_RECORD_MMAP2;
 267         t = rdclock();
 268
 269         while (1) {
 270                 char bf[BUFSIZ];
 271                 char prot[5];
 272                 char execname[PATH_MAX];
 273                 char anonstr[] = "//anon";
 274                 unsigned int ino;
 275                 size_t size;
 276                 ssize_t n;
 277
 278                 if (fgets(bf, sizeof(bf), fp) == NULL)
 279                         break;
 280
 281                 if ((rdclock() - t) > timeout) {
 282                         pr_warning("Reading %s time out. "
 283                                    "You may want to increase "
 284                                    "the time limit by --proc-map-timeout\n",
 285                                    filename);
 286                         truncation = true;
 287                         goto out;
 288                 }
 289
 290                 /* ensure null termination since stack will be reused. */
 291                 strcpy(execname, "");
 292
 293                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 294                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 295                        &event->mmap2.start, &event->mmap2.len, prot,
 296                        &event->mmap2.pgoff, &event->mmap2.maj,
 297                        &event->mmap2.min,
 298                        &ino, execname);
 299
 300                 /*
 301                  * Anon maps don't have the execname.
 302                  */
 303                 if (n < 7)
 304                         continue;
 305
 306                 event->mmap2.ino = (u64)ino;
 307
 308                 /*
 309                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 310                  */
 311                 if (machine__is_host(machine))
 312                         event->header.misc = PERF_RECORD_MISC_USER;
 313                 else
 314                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 315
 316                 /* map protection and flags bits */
 317                 event->mmap2.prot = 0;
 318                 event->mmap2.flags = 0;
 319                 if (prot[0] == 'r')
 320                         event->mmap2.prot |= PROT_READ;
 321                 if (prot[1] == 'w')
 322                         event->mmap2.prot |= PROT_WRITE;
 323                 if (prot[2] == 'x')
 324                         event->mmap2.prot |= PROT_EXEC;
 325
 326                 if (prot[3] == 's')
 327                         event->mmap2.flags |= MAP_SHARED;
 328                 else
 329                         event->mmap2.flags |= MAP_PRIVATE;
 330
 331                 if (prot[2] != 'x') {
 332                         if (!mmap_data || prot[0] != 'r')
 333                                 continue;
 334
 335                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 336                 }
 337
 338 out:
 339                 if (truncation)
 340                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 341
 342                 if (!strcmp(execname, ""))
 343                         strcpy(execname, anonstr);
 344
 345                 size = strlen(execname) + 1;
 346                 memcpy(event->mmap2.filename, execname, size);
 347                 size = PERF_ALIGN(size, sizeof(u64));
 348                 event->mmap2.len -= event->mmap.start;
 349                 event->mmap2.header.size = (sizeof(event->mmap2) -
 350                                         (sizeof(event->mmap2.filename) - size));
 351                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 352                 event->mmap2.header.size += machine->id_hdr_size;
 353                 event->mmap2.pid = tgid;
 354                 event->mmap2.tid = pid;
 355
 356                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 357                         rc = -1;
 358                         break;
 359                 }
 360
 361                 if (truncation)
 362                         break;
 363         }
 364
 365         fclose(fp);
 366         return rc;
 367 }
 368
 369 int perf_event__synthesize_modules(struct perf_tool *tool,
 370                                    perf_event__handler_t process,
 371                                    struct machine *machine)
 372 {
 373         int rc = 0;
 374         struct map *pos;
 375         struct map_groups *kmaps = &machine->kmaps;
 376         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 377         union perf_event *event = zalloc((sizeof(event->mmap) +
 378                                           machine->id_hdr_size));
 379         if (event == NULL) {
 380                 pr_debug("Not enough memory synthesizing mmap event "
 381                          "for kernel modules\n");
 382                 return -1;
 383         }
 384
 385         event->header.type = PERF_RECORD_MMAP;
 386
 387         /*
 388          * kernel uses 0 for user space maps, see kernel/perf_event.c
 389          * __perf_event_mmap
 390          */
 391         if (machine__is_host(machine))
 392                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 393         else
 394                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 395
 396         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 397                 size_t size;
 398
 399                 if (__map__is_kernel(pos))
 400                         continue;
 401
 402                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 403                 event->mmap.header.type = PERF_RECORD_MMAP;
 404                 event->mmap.header.size = (sizeof(event->mmap) -
 405                                         (sizeof(event->mmap.filename) - size));
 406                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 407                 event->mmap.header.size += machine->id_hdr_size;
 408                 event->mmap.start = pos->start;
 409                 event->mmap.len   = pos->end - pos->start;
 410                 event->mmap.pid   = machine->pid;
 411
 412                 memcpy(event->mmap.filename, pos->dso->long_name,
 413                        pos->dso->long_name_len + 1);
 414                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 415                         rc = -1;
 416                         break;
 417                 }
 418         }
 419
 420         free(event);
 421         return rc;
 422 }
 423
 424 static int __event__synthesize_thread(union perf_event *comm_event,
 425                                       union perf_event *mmap_event,
 426                                       union perf_event *fork_event,
 427                                       pid_t pid, int full,
 428                                           perf_event__handler_t process,
 429                                       struct perf_tool *tool,
 430                                       struct machine *machine,
 431                                       bool mmap_data,
 432                                       unsigned int proc_map_timeout)
 433 {
 434         char filename[PATH_MAX];
 435         DIR *tasks;
 436         struct dirent *dirent;
 437         pid_t tgid, ppid;
 438         int rc = 0;
 439
 440         /* special case: only send one comm event using passed in pid */
 441         if (!full) {
 442                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 443                                                    process, machine);
 444
 445                 if (tgid == -1)
 446                         return -1;
 447
 448                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 449                                                           process, machine, mmap_data,
 450                                                           proc_map_timeout);
 451         }
 452
 453         if (machine__is_default_guest(machine))
 454                 return 0;
 455
 456         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 457                  machine->root_dir, pid);
 458
 459         tasks = opendir(filename);
 460         if (tasks == NULL) {
 461                 pr_debug("couldn't open %s\n", filename);
 462                 return 0;
 463         }
 464
 465         while ((dirent = readdir(tasks)) != NULL) {
 466                 char *end;
 467                 pid_t _pid;
 468
 469                 _pid = strtol(dirent->d_name, &end, 10);
 470                 if (*end)
 471                         continue;
 472
 473                 rc = -1;
 474                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 475                                              &tgid, &ppid) != 0)
 476                         break;
 477
 478                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 479                                                 ppid, process, machine) < 0)
 480                         break;
 481                 /*
 482                  * Send the prepared comm event
 483                  */
 484                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 485                         break;
 486
 487                 rc = 0;
 488                 if (_pid == pid) {
 489                         /* process the parent's maps too */
 490                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 491                                                 process, machine, mmap_data, proc_map_timeout);
 492                         if (rc)
 493                                 break;
 494                 }
 495         }
 496
 497         closedir(tasks);
 498         return rc;
 499 }
 500
 501 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 502                                       struct thread_map *threads,
 503                                       perf_event__handler_t process,
 504                                       struct machine *machine,
 505                                       bool mmap_data,
 506                                       unsigned int proc_map_timeout)
 507 {
 508         union perf_event *comm_event, *mmap_event, *fork_event;
 509         int err = -1, thread, j;
 510
 511         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 512         if (comm_event == NULL)
 513                 goto out;
 514
 515         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 516         if (mmap_event == NULL)
 517                 goto out_free_comm;
 518
 519         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 520         if (fork_event == NULL)
 521                 goto out_free_mmap;
 522
 523         err = 0;
 524         for (thread = 0; thread < threads->nr; ++thread) {
 525                 if (__event__synthesize_thread(comm_event, mmap_event,
 526                                                fork_event,
 527                                                thread_map__pid(threads, thread), 0,
 528                                                process, tool, machine,
 529                                                mmap_data, proc_map_timeout)) {
 530                         err = -1;
 531                         break;
 532                 }
 533
 534                 /*
 535                  * comm.pid is set to thread group id by
 536                  * perf_event__synthesize_comm
 537                  */
 538                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 539                         bool need_leader = true;
 540
 541                         /* is thread group leader in thread_map? */
 542                         for (j = 0; j < threads->nr; ++j) {
 543                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 544                                         need_leader = false;
 545                                         break;
 546                                 }
 547                         }
 548
 549                         /* if not, generate events for it */
 550                         if (need_leader &&
 551                             __event__synthesize_thread(comm_event, mmap_event,
 552                                                        fork_event,
 553                                                        comm_event->comm.pid, 0,
 554                                                        process, tool, machine,
 555                                                        mmap_data, proc_map_timeout)) {
 556                                 err = -1;
 557                                 break;
 558                         }
 559                 }
 560         }
 561         free(fork_event);
 562 out_free_mmap:
 563         free(mmap_event);
 564 out_free_comm:
 565         free(comm_event);
 566 out:
 567         return err;
 568 }
 569
 570 int perf_event__synthesize_threads(struct perf_tool *tool,
 571                                    perf_event__handler_t process,
 572                                    struct machine *machine,
 573                                    bool mmap_data,
 574                                    unsigned int proc_map_timeout)
 575 {
 576         DIR *proc;
 577         char proc_path[PATH_MAX];
 578         struct dirent *dirent;
 579         union perf_event *comm_event, *mmap_event, *fork_event;
 580         int err = -1;
 581
 582         if (machine__is_default_guest(machine))
 583                 return 0;
 584
 585         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 586         if (comm_event == NULL)
 587                 goto out;
 588
 589         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 590         if (mmap_event == NULL)
 591                 goto out_free_comm;
 592
 593         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 594         if (fork_event == NULL)
 595                 goto out_free_mmap;
 596
 597         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 598         proc = opendir(proc_path);
 599
 600         if (proc == NULL)
 601                 goto out_free_fork;
 602
 603         while ((dirent = readdir(proc)) != NULL) {
 604                 char *end;
 605                 pid_t pid = strtol(dirent->d_name, &end, 10);
 606
 607                 if (*end) /* only interested in proper numerical dirents */
 608                         continue;
 609                 /*
 610                  * We may race with exiting thread, so don't stop just because
 611                  * one thread couldn't be synthesized.
 612                  */
 613                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 614                                            1, process, tool, machine, mmap_data,
 615                                            proc_map_timeout);
 616         }
 617
 618         err = 0;
 619         closedir(proc);
 620 out_free_fork:
 621         free(fork_event);
 622 out_free_mmap:
 623         free(mmap_event);
 624 out_free_comm:
 625         free(comm_event);
 626 out:
 627         return err;
 628 }
 629
 630 struct process_symbol_args {
 631         const char *name;
 632         u64        start;
 633 };
 634
 635 static int find_symbol_cb(void *arg, const char *name, char type,
 636                           u64 start)
 637 {
 638         struct process_symbol_args *args = arg;
 639
 640         /*
 641          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 642          * an 'A' to the same address as "_stext".
 643          */
 644         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 645               type == 'A') || strcmp(name, args->name))
 646                 return 0;
 647
 648         args->start = start;
 649         return 1;
 650 }
 651
 652 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 653                                  const char *symbol_name)
 654 {
 655         struct process_symbol_args args = { .name = symbol_name, };
 656
 657         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 658                 return 0;
 659
 660         return args.start;
 661 }
 662
 663 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 664                                        perf_event__handler_t process,
 665                                        struct machine *machine)
 666 {
 667         size_t size;
 668         const char *mmap_name;
 669         char name_buff[PATH_MAX];
 670         struct map *map = machine__kernel_map(machine);
 671         struct kmap *kmap;
 672         int err;
 673         union perf_event *event;
 674
 675         if (map == NULL)
 676                 return -1;
 677
 678         /*
 679          * We should get this from /sys/kernel/sections/.text, but till that is
 680          * available use this, and after it is use this as a fallback for older
 681          * kernels.
 682          */
 683         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 684         if (event == NULL) {
 685                 pr_debug("Not enough memory synthesizing mmap event "
 686                          "for kernel modules\n");
 687                 return -1;
 688         }
 689
 690         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 691         if (machine__is_host(machine)) {
 692                 /*
 693                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 694                  * see kernel/perf_event.c __perf_event_mmap
 695                  */
 696                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 697         } else {
 698                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 699         }
 700
 701         kmap = map__kmap(map);
 702         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 703                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 704         size = PERF_ALIGN(size, sizeof(u64));
 705         event->mmap.header.type = PERF_RECORD_MMAP;
 706         event->mmap.header.size = (sizeof(event->mmap) -
 707                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 708         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 709         event->mmap.start = map->start;
 710         event->mmap.len   = map->end - event->mmap.start;
 711         event->mmap.pid   = machine->pid;
 712
 713         err = perf_tool__process_synth_event(tool, event, machine, process);
 714         free(event);
 715
 716         return err;
 717 }
 718
 719 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 720                                       struct thread_map *threads,
 721                                       perf_event__handler_t process,
 722                                       struct machine *machine)
 723 {
 724         union perf_event *event;
 725         int i, err, size;
 726
 727         size  = sizeof(event->thread_map);
 728         size += threads->nr * sizeof(event->thread_map.entries[0]);
 729
 730         event = zalloc(size);
 731         if (!event)
 732                 return -ENOMEM;
 733
 734         event->header.type = PERF_RECORD_THREAD_MAP;
 735         event->header.size = size;
 736         event->thread_map.nr = threads->nr;
 737
 738         for (i = 0; i < threads->nr; i++) {
 739                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 740                 char *comm = thread_map__comm(threads, i);
 741
 742                 if (!comm)
 743                         comm = (char *) "";
 744
 745                 entry->pid = thread_map__pid(threads, i);
 746                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 747         }
 748
 749         err = process(tool, event, NULL, machine);
 750
 751         free(event);
 752         return err;
 753 }
 754
 755 static void synthesize_cpus(struct cpu_map_entries *cpus,
 756                             struct cpu_map *map)
 757 {
 758         int i;
 759
 760         cpus->nr = map->nr;
 761
 762         for (i = 0; i < map->nr; i++)
 763                 cpus->cpu[i] = map->map[i];
 764 }
 765
 766 static void synthesize_mask(struct cpu_map_mask *mask,
 767                             struct cpu_map *map, int max)
 768 {
 769         int i;
 770
 771         mask->nr = BITS_TO_LONGS(max);
 772         mask->long_size = sizeof(long);
 773
 774         for (i = 0; i < map->nr; i++)
 775                 set_bit(map->map[i], mask->mask);
 776 }
 777
 778 static size_t cpus_size(struct cpu_map *map)
 779 {
 780         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
 781 }
 782
 783 static size_t mask_size(struct cpu_map *map, int *max)
 784 {
 785         int i;
 786
 787         *max = 0;
 788
 789         for (i = 0; i < map->nr; i++) {
 790                 /* bit possition of the cpu is + 1 */
 791                 int bit = map->map[i] + 1;
 792
 793                 if (bit > *max)
 794                         *max = bit;
 795         }
 796
 797         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
 798 }
 799
 800 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
 801 {
 802         size_t size_cpus, size_mask;
 803         bool is_dummy = cpu_map__empty(map);
 804
 805         /*
 806          * Both array and mask data have variable size based
 807          * on the number of cpus and their actual values.
 808          * The size of the 'struct cpu_map_data' is:
 809          *
 810          *   array = size of 'struct cpu_map_entries' +
 811          *           number of cpus * sizeof(u64)
 812          *
 813          *   mask  = size of 'struct cpu_map_mask' +
 814          *           maximum cpu bit converted to size of longs
 815          *
 816          * and finaly + the size of 'struct cpu_map_data'.
 817          */
 818         size_cpus = cpus_size(map);
 819         size_mask = mask_size(map, max);
 820
 821         if (is_dummy || (size_cpus < size_mask)) {
 822                 *size += size_cpus;
 823                 *type  = PERF_CPU_MAP__CPUS;
 824         } else {
 825                 *size += size_mask;
 826                 *type  = PERF_CPU_MAP__MASK;
 827         }
 828
 829         *size += sizeof(struct cpu_map_data);
 830         return zalloc(*size);
 831 }
 832
 833 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
 834                               u16 type, int max)
 835 {
 836         data->type = type;
 837
 838         switch (type) {
 839         case PERF_CPU_MAP__CPUS:
 840                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
 841                 break;
 842         case PERF_CPU_MAP__MASK:
 843                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
 844         default:
 845                 break;
 846         };
 847 }
 848
 849 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
 850 {
 851         size_t size = sizeof(struct cpu_map_event);
 852         struct cpu_map_event *event;
 853         int max;
 854         u16 type;
 855
 856         event = cpu_map_data__alloc(map, &size, &type, &max);
 857         if (!event)
 858                 return NULL;
 859
 860         event->header.type = PERF_RECORD_CPU_MAP;
 861         event->header.size = size;
 862         event->data.type   = type;
 863
 864         cpu_map_data__synthesize(&event->data, map, type, max);
 865         return event;
 866 }
 867
 868 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
 869                                    struct cpu_map *map,
 870                                    perf_event__handler_t process,
 871                                    struct machine *machine)
 872 {
 873         struct cpu_map_event *event;
 874         int err;
 875
 876         event = cpu_map_event__new(map);
 877         if (!event)
 878                 return -ENOMEM;
 879
 880         err = process(tool, (union perf_event *) event, NULL, machine);
 881
 882         free(event);
 883         return err;
 884 }
 885
 886 int perf_event__synthesize_stat_config(struct perf_tool *tool,
 887                                        struct perf_stat_config *config,
 888                                        perf_event__handler_t process,
 889                                        struct machine *machine)
 890 {
 891         struct stat_config_event *event;
 892         int size, i = 0, err;
 893
 894         size  = sizeof(*event);
 895         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
 896
 897         event = zalloc(size);
 898         if (!event)
 899                 return -ENOMEM;
 900
 901         event->header.type = PERF_RECORD_STAT_CONFIG;
 902         event->header.size = size;
 903         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
 904
 905 #define ADD(__term, __val)                                      \
 906         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
 907         event->data[i].val = __val;                             \
 908         i++;
 909
 910         ADD(AGGR_MODE,  config->aggr_mode)
 911         ADD(INTERVAL,   config->interval)
 912         ADD(SCALE,      config->scale)
 913
 914         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
 915                   "stat config terms unbalanced\n");
 916 #undef ADD
 917
 918         err = process(tool, (union perf_event *) event, NULL, machine);
 919
 920         free(event);
 921         return err;
 922 }
 923
 924 int perf_event__synthesize_stat(struct perf_tool *tool,
 925                                 u32 cpu, u32 thread, u64 id,
 926                                 struct perf_counts_values *count,
 927                                 perf_event__handler_t process,
 928                                 struct machine *machine)
 929 {
 930         struct stat_event event;
 931
 932         event.header.type = PERF_RECORD_STAT;
 933         event.header.size = sizeof(event);
 934         event.header.misc = 0;
 935
 936         event.id        = id;
 937         event.cpu       = cpu;
 938         event.thread    = thread;
 939         event.val       = count->val;
 940         event.ena       = count->ena;
 941         event.run       = count->run;
 942
 943         return process(tool, (union perf_event *) &event, NULL, machine);
 944 }
 945
 946 int perf_event__synthesize_stat_round(struct perf_tool *tool,
 947                                       u64 evtime, u64 type,
 948                                       perf_event__handler_t process,
 949                                       struct machine *machine)
 950 {
 951         struct stat_round_event event;
 952
 953         event.header.type = PERF_RECORD_STAT_ROUND;
 954         event.header.size = sizeof(event);
 955         event.header.misc = 0;
 956
 957         event.time = evtime;
 958         event.type = type;
 959
 960         return process(tool, (union perf_event *) &event, NULL, machine);
 961 }
 962
 963 void perf_event__read_stat_config(struct perf_stat_config *config,
 964                                   struct stat_config_event *event)
 965 {
 966         unsigned i;
 967
 968         for (i = 0; i < event->nr; i++) {
 969
 970                 switch (event->data[i].tag) {
 971 #define CASE(__term, __val)                                     \
 972                 case PERF_STAT_CONFIG_TERM__##__term:           \
 973                         config->__val = event->data[i].val;     \
 974                         break;
 975
 976                 CASE(AGGR_MODE, aggr_mode)
 977                 CASE(SCALE,     scale)
 978                 CASE(INTERVAL,  interval)
 979 #undef CASE
 980                 default:
 981                         pr_warning("unknown stat config term %" PRIu64 "\n",
 982                                    event->data[i].tag);
 983                 }
 984         }
 985 }
 986
 987 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 988 {
 989         const char *s;
 990
 991         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
 992                 s = " exec";
 993         else
 994                 s = "";
 995
 996         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
 997 }
 998
 999 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1000                              union perf_event *event,
1001                              struct perf_sample *sample,
1002                              struct machine *machine)
1003 {
1004         return machine__process_comm_event(machine, event, sample);
1005 }
1006
1007 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1008                              union perf_event *event,
1009                              struct perf_sample *sample,
1010                              struct machine *machine)
1011 {
1012         return machine__process_lost_event(machine, event, sample);
1013 }
1014
1015 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1016                             union perf_event *event,
1017                             struct perf_sample *sample __maybe_unused,
1018                             struct machine *machine)
1019 {
1020         return machine__process_aux_event(machine, event);
1021 }
1022
1023 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1024                                      union perf_event *event,
1025                                      struct perf_sample *sample __maybe_unused,
1026                                      struct machine *machine)
1027 {
1028         return machine__process_itrace_start_event(machine, event);
1029 }
1030
1031 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1032                                      union perf_event *event,
1033                                      struct perf_sample *sample,
1034                                      struct machine *machine)
1035 {
1036         return machine__process_lost_samples_event(machine, event, sample);
1037 }
1038
1039 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1040                                union perf_event *event,
1041                                struct perf_sample *sample __maybe_unused,
1042                                struct machine *machine)
1043 {
1044         return machine__process_switch_event(machine, event);
1045 }
1046
1047 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1048 {
1049         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1050                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1051                        event->mmap.len, event->mmap.pgoff,
1052                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1053                        event->mmap.filename);
1054 }
1055
1056 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1057 {
1058         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1059                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1060                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1061                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1062                        event->mmap2.min, event->mmap2.ino,
1063                        event->mmap2.ino_generation,
1064                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1065                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1066                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1067                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1068                        event->mmap2.filename);
1069 }
1070
1071 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1072 {
1073         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1074         size_t ret;
1075
1076         ret = fprintf(fp, " nr: ");
1077
1078         if (threads)
1079                 ret += thread_map__fprintf(threads, fp);
1080         else
1081                 ret += fprintf(fp, "failed to get threads from event\n");
1082
1083         thread_map__put(threads);
1084         return ret;
1085 }
1086
1087 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1088 {
1089         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1090         size_t ret;
1091
1092         ret = fprintf(fp, " nr: ");
1093
1094         if (cpus)
1095                 ret += cpu_map__fprintf(cpus, fp);
1096         else
1097                 ret += fprintf(fp, "failed to get cpumap from event\n");
1098
1099         cpu_map__put(cpus);
1100         return ret;
1101 }
1102
1103 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1104                              union perf_event *event,
1105                              struct perf_sample *sample,
1106                              struct machine *machine)
1107 {
1108         return machine__process_mmap_event(machine, event, sample);
1109 }
1110
1111 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1112                              union perf_event *event,
1113                              struct perf_sample *sample,
1114                              struct machine *machine)
1115 {
1116         return machine__process_mmap2_event(machine, event, sample);
1117 }
1118
1119 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1120 {
1121         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1122                        event->fork.pid, event->fork.tid,
1123                        event->fork.ppid, event->fork.ptid);
1124 }
1125
1126 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1127                              union perf_event *event,
1128                              struct perf_sample *sample,
1129                              struct machine *machine)
1130 {
1131         return machine__process_fork_event(machine, event, sample);
1132 }
1133
1134 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1135                              union perf_event *event,
1136                              struct perf_sample *sample,
1137                              struct machine *machine)
1138 {
1139         return machine__process_exit_event(machine, event, sample);
1140 }
1141
1142 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1143 {
1144         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1145                        event->aux.aux_offset, event->aux.aux_size,
1146                        event->aux.flags,
1147                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1148                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1149 }
1150
1151 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1152 {
1153         return fprintf(fp, " pid: %u tid: %u\n",
1154                        event->itrace_start.pid, event->itrace_start.tid);
1155 }
1156
1157 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1158 {
1159         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1160         const char *in_out = out ? "OUT" : "IN ";
1161
1162         if (event->header.type == PERF_RECORD_SWITCH)
1163                 return fprintf(fp, " %s\n", in_out);
1164
1165         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1166                        in_out, out ? "next" : "prev",
1167                        event->context_switch.next_prev_pid,
1168                        event->context_switch.next_prev_tid);
1169 }
1170
1171 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1172 {
1173         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1174                              perf_event__name(event->header.type));
1175
1176         switch (event->header.type) {
1177         case PERF_RECORD_COMM:
1178                 ret += perf_event__fprintf_comm(event, fp);
1179                 break;
1180         case PERF_RECORD_FORK:
1181         case PERF_RECORD_EXIT:
1182                 ret += perf_event__fprintf_task(event, fp);
1183                 break;
1184         case PERF_RECORD_MMAP:
1185                 ret += perf_event__fprintf_mmap(event, fp);
1186                 break;
1187         case PERF_RECORD_MMAP2:
1188                 ret += perf_event__fprintf_mmap2(event, fp);
1189                 break;
1190         case PERF_RECORD_AUX:
1191                 ret += perf_event__fprintf_aux(event, fp);
1192                 break;
1193         case PERF_RECORD_ITRACE_START:
1194                 ret += perf_event__fprintf_itrace_start(event, fp);
1195                 break;
1196         case PERF_RECORD_SWITCH:
1197         case PERF_RECORD_SWITCH_CPU_WIDE:
1198                 ret += perf_event__fprintf_switch(event, fp);
1199                 break;
1200         default:
1201                 ret += fprintf(fp, "\n");
1202         }
1203
1204         return ret;
1205 }
1206
1207 int perf_event__process(struct perf_tool *tool __maybe_unused,
1208                         union perf_event *event,
1209                         struct perf_sample *sample,
1210                         struct machine *machine)
1211 {
1212         return machine__process_event(machine, event, sample);
1213 }
1214
1215 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1216                            enum map_type type, u64 addr,
1217                            struct addr_location *al)
1218 {
1219         struct map_groups *mg = thread->mg;
1220         struct machine *machine = mg->machine;
1221         bool load_map = false;
1222
1223         al->machine = machine;
1224         al->thread = thread;
1225         al->addr = addr;
1226         al->cpumode = cpumode;
1227         al->filtered = 0;
1228
1229         if (machine == NULL) {
1230                 al->map = NULL;
1231                 return;
1232         }
1233
1234         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1235                 al->level = 'k';
1236                 mg = &machine->kmaps;
1237                 load_map = true;
1238         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1239                 al->level = '.';
1240         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1241                 al->level = 'g';
1242                 mg = &machine->kmaps;
1243                 load_map = true;
1244         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1245                 al->level = 'u';
1246         } else {
1247                 al->level = 'H';
1248                 al->map = NULL;
1249
1250                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1251                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1252                         !perf_guest)
1253                         al->filtered |= (1 << HIST_FILTER__GUEST);
1254                 if ((cpumode == PERF_RECORD_MISC_USER ||
1255                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1256                         !perf_host)
1257                         al->filtered |= (1 << HIST_FILTER__HOST);
1258
1259                 return;
1260         }
1261 try_again:
1262         al->map = map_groups__find(mg, type, al->addr);
1263         if (al->map == NULL) {
1264                 /*
1265                  * If this is outside of all known maps, and is a negative
1266                  * address, try to look it up in the kernel dso, as it might be
1267                  * a vsyscall or vdso (which executes in user-mode).
1268                  *
1269                  * XXX This is nasty, we should have a symbol list in the
1270                  * "[vdso]" dso, but for now lets use the old trick of looking
1271                  * in the whole kernel symbol list.
1272                  */
1273                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1274                     mg != &machine->kmaps &&
1275                     machine__kernel_ip(machine, al->addr)) {
1276                         mg = &machine->kmaps;
1277                         load_map = true;
1278                         goto try_again;
1279                 }
1280         } else {
1281                 /*
1282                  * Kernel maps might be changed when loading symbols so loading
1283                  * must be done prior to using kernel maps.
1284                  */
1285                 if (load_map)
1286                         map__load(al->map, machine->symbol_filter);
1287                 al->addr = al->map->map_ip(al->map, al->addr);
1288         }
1289 }
1290
1291 void thread__find_addr_location(struct thread *thread,
1292                                 u8 cpumode, enum map_type type, u64 addr,
1293                                 struct addr_location *al)
1294 {
1295         thread__find_addr_map(thread, cpumode, type, addr, al);
1296         if (al->map != NULL)
1297                 al->sym = map__find_symbol(al->map, al->addr,
1298                                            thread->mg->machine->symbol_filter);
1299         else
1300                 al->sym = NULL;
1301 }
1302
1303 /*
1304  * Callers need to drop the reference to al->thread, obtained in
1305  * machine__findnew_thread()
1306  */
1307 int machine__resolve(struct machine *machine, struct addr_location *al,
1308                      struct perf_sample *sample)
1309 {
1310         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1311                                                         sample->tid);
1312
1313         if (thread == NULL)
1314                 return -1;
1315
1316         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1317         /*
1318          * Have we already created the kernel maps for this machine?
1319          *
1320          * This should have happened earlier, when we processed the kernel MMAP
1321          * events, but for older perf.data files there was no such thing, so do
1322          * it now.
1323          */
1324         if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1325             machine__kernel_map(machine) == NULL)
1326                 machine__create_kernel_maps(machine);
1327
1328         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1329         dump_printf(" ...... dso: %s\n",
1330                     al->map ? al->map->dso->long_name :
1331                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1332
1333         if (thread__is_filtered(thread))
1334                 al->filtered |= (1 << HIST_FILTER__THREAD);
1335
1336         al->sym = NULL;
1337         al->cpu = sample->cpu;
1338         al->socket = -1;
1339
1340         if (al->cpu >= 0) {
1341                 struct perf_env *env = machine->env;
1342
1343                 if (env && env->cpu)
1344                         al->socket = env->cpu[al->cpu].socket_id;
1345         }
1346
1347         if (al->map) {
1348                 struct dso *dso = al->map->dso;
1349
1350                 if (symbol_conf.dso_list &&
1351                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1352                                                   dso->short_name) ||
1353                                (dso->short_name != dso->long_name &&
1354                                 strlist__has_entry(symbol_conf.dso_list,
1355                                                    dso->long_name))))) {
1356                         al->filtered |= (1 << HIST_FILTER__DSO);
1357                 }
1358
1359                 al->sym = map__find_symbol(al->map, al->addr,
1360                                            machine->symbol_filter);
1361         }
1362
1363         if (symbol_conf.sym_list &&
1364                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1365                                                 al->sym->name))) {
1366                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1367         }
1368
1369         return 0;
1370 }
1371
1372 /*
1373  * The preprocess_sample method will return with reference counts for the
1374  * in it, when done using (and perhaps getting ref counts if needing to
1375  * keep a pointer to one of those entries) it must be paired with
1376  * addr_location__put(), so that the refcounts can be decremented.
1377  */
1378 void addr_location__put(struct addr_location *al)
1379 {
1380         thread__zput(al->thread);
1381 }
1382
1383 bool is_bts_event(struct perf_event_attr *attr)
1384 {
1385         return attr->type == PERF_TYPE_HARDWARE &&
1386                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1387                attr->sample_period == 1;
1388 }
1389
1390 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1391 {
1392         if (attr->type == PERF_TYPE_SOFTWARE &&
1393             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1394              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1395              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1396                 return true;
1397
1398         if (is_bts_event(attr))
1399                 return true;
1400
1401         return false;
1402 }
1403
1404 void thread__resolve(struct thread *thread, struct addr_location *al,
1405                      struct perf_sample *sample)
1406 {
1407         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1408         if (!al->map)
1409                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1410                                       sample->addr, al);
1411
1412         al->cpu = sample->cpu;
1413         al->sym = NULL;
1414
1415         if (al->map)
1416                 al->sym = map__find_symbol(al->map, al->addr, NULL);
1417 }