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