tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
   3 #include <api/fs/fs.h>
   4 #include "event.h"
   5 #include "debug.h"
   6 #include "hist.h"
   7 #include "machine.h"
   8 #include "sort.h"
   9 #include "string.h"
  10 #include "strlist.h"
  11 #include "thread.h"
  12 #include "thread_map.h"
  13 #include "symbol/kallsyms.h"
  14 #include "asm/bug.h"
  15 #include "stat.h"
  16
  17 static const char *perf_event__names[] = {
  18         [0]                                     = "TOTAL",
  19         [PERF_RECORD_MMAP]                      = "MMAP",
  20         [PERF_RECORD_MMAP2]                     = "MMAP2",
  21         [PERF_RECORD_LOST]                      = "LOST",
  22         [PERF_RECORD_COMM]                      = "COMM",
  23         [PERF_RECORD_EXIT]                      = "EXIT",
  24         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  25         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  26         [PERF_RECORD_FORK]                      = "FORK",
  27         [PERF_RECORD_READ]                      = "READ",
  28         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  29         [PERF_RECORD_AUX]                       = "AUX",
  30         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  31         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  32         [PERF_RECORD_SWITCH]                    = "SWITCH",
  33         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  34         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  35         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  36         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  37         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  38         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  39         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  40         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  41         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  42         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  43         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  44         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  45         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  46         [PERF_RECORD_STAT]                      = "STAT",
  47         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  48         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  49         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  50 };
  51
  52 const char *perf_event__name(unsigned int id)
  53 {
  54         if (id >= ARRAY_SIZE(perf_event__names))
  55                 return "INVALID";
  56         if (!perf_event__names[id])
  57                 return "UNKNOWN";
  58         return perf_event__names[id];
  59 }
  60
  61 static int perf_tool__process_synth_event(struct perf_tool *tool,
  62                                           union perf_event *event,
  63                                           struct machine *machine,
  64                                           perf_event__handler_t process)
  65 {
  66         struct perf_sample synth_sample = {
  67         .pid       = -1,
  68         .tid       = -1,
  69         .time      = -1,
  70         .stream_id = -1,
  71         .cpu       = -1,
  72         .period    = 1,
  73         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
  74         };
  75
  76         return process(tool, event, &synth_sample, machine);
  77 };
  78
  79 /*
  80  * Assumes that the first 4095 bytes of /proc/pid/stat contains
  81  * the comm, tgid and ppid.
  82  */
  83 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
  84                                     pid_t *tgid, pid_t *ppid)
  85 {
  86         char filename[PATH_MAX];
  87         char bf[4096];
  88         int fd;
  89         size_t size = 0;
  90         ssize_t n;
  91         char *nl, *name, *tgids, *ppids;
  92
  93         *tgid = -1;
  94         *ppid = -1;
  95
  96         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  97
  98         fd = open(filename, O_RDONLY);
  99         if (fd < 0) {
 100                 pr_debug("couldn't open %s\n", filename);
 101                 return -1;
 102         }
 103
 104         n = read(fd, bf, sizeof(bf) - 1);
 105         close(fd);
 106         if (n <= 0) {
 107                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 108                            pid);
 109                 return -1;
 110         }
 111         bf[n] = '\0';
 112
 113         name = strstr(bf, "Name:");
 114         tgids = strstr(bf, "Tgid:");
 115         ppids = strstr(bf, "PPid:");
 116
 117         if (name) {
 118                 name += 5;  /* strlen("Name:") */
 119
 120                 while (*name && isspace(*name))
 121                         ++name;
 122
 123                 nl = strchr(name, '\n');
 124                 if (nl)
 125                         *nl = '\0';
 126
 127                 size = strlen(name);
 128                 if (size >= len)
 129                         size = len - 1;
 130                 memcpy(comm, name, size);
 131                 comm[size] = '\0';
 132         } else {
 133                 pr_debug("Name: string not found for pid %d\n", pid);
 134         }
 135
 136         if (tgids) {
 137                 tgids += 5;  /* strlen("Tgid:") */
 138                 *tgid = atoi(tgids);
 139         } else {
 140                 pr_debug("Tgid: string not found for pid %d\n", pid);
 141         }
 142
 143         if (ppids) {
 144                 ppids += 5;  /* strlen("PPid:") */
 145                 *ppid = atoi(ppids);
 146         } else {
 147                 pr_debug("PPid: string not found for pid %d\n", pid);
 148         }
 149
 150         return 0;
 151 }
 152
 153 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 154                                     struct machine *machine,
 155                                     pid_t *tgid, pid_t *ppid)
 156 {
 157         size_t size;
 158
 159         *ppid = -1;
 160
 161         memset(&event->comm, 0, sizeof(event->comm));
 162
 163         if (machine__is_host(machine)) {
 164                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 165                                              sizeof(event->comm.comm),
 166                                              tgid, ppid) != 0) {
 167                         return -1;
 168                 }
 169         } else {
 170                 *tgid = machine->pid;
 171         }
 172
 173         if (*tgid < 0)
 174                 return -1;
 175
 176         event->comm.pid = *tgid;
 177         event->comm.header.type = PERF_RECORD_COMM;
 178
 179         size = strlen(event->comm.comm) + 1;
 180         size = PERF_ALIGN(size, sizeof(u64));
 181         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 182         event->comm.header.size = (sizeof(event->comm) -
 183                                 (sizeof(event->comm.comm) - size) +
 184                                 machine->id_hdr_size);
 185         event->comm.tid = pid;
 186
 187         return 0;
 188 }
 189
 190 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 191                                          union perf_event *event, pid_t pid,
 192                                          perf_event__handler_t process,
 193                                          struct machine *machine)
 194 {
 195         pid_t tgid, ppid;
 196
 197         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 198                 return -1;
 199
 200         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 201                 return -1;
 202
 203         return tgid;
 204 }
 205
 206 static int perf_event__synthesize_fork(struct perf_tool *tool,
 207                                        union perf_event *event,
 208                                        pid_t pid, pid_t tgid, pid_t ppid,
 209                                        perf_event__handler_t process,
 210                                        struct machine *machine)
 211 {
 212         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 213
 214         /*
 215          * for main thread set parent to ppid from status file. For other
 216          * threads set parent pid to main thread. ie., assume main thread
 217          * spawns all threads in a process
 218         */
 219         if (tgid == pid) {
 220                 event->fork.ppid = ppid;
 221                 event->fork.ptid = ppid;
 222         } else {
 223                 event->fork.ppid = tgid;
 224                 event->fork.ptid = tgid;
 225         }
 226         event->fork.pid  = tgid;
 227         event->fork.tid  = pid;
 228         event->fork.header.type = PERF_RECORD_FORK;
 229
 230         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 231
 232         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 233                 return -1;
 234
 235         return 0;
 236 }
 237
 238 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 239                                        union perf_event *event,
 240                                        pid_t pid, pid_t tgid,
 241                                        perf_event__handler_t process,
 242                                        struct machine *machine,
 243                                        bool mmap_data,
 244                                        unsigned int proc_map_timeout)
 245 {
 246         char filename[PATH_MAX];
 247         FILE *fp;
 248         unsigned long long t;
 249         bool truncation = false;
 250         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 251         int rc = 0;
 252         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 253         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 254
 255         if (machine__is_default_guest(machine))
 256                 return 0;
 257
 258         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 259                  machine->root_dir, pid);
 260
 261         fp = fopen(filename, "r");
 262         if (fp == NULL) {
 263                 /*
 264                  * We raced with a task exiting - just return:
 265                  */
 266                 pr_debug("couldn't open %s\n", filename);
 267                 return -1;
 268         }
 269
 270         event->header.type = PERF_RECORD_MMAP2;
 271         t = rdclock();
 272
 273         while (1) {
 274                 char bf[BUFSIZ];
 275                 char prot[5];
 276                 char execname[PATH_MAX];
 277                 char anonstr[] = "//anon";
 278                 unsigned int ino;
 279                 size_t size;
 280                 ssize_t n;
 281
 282                 if (fgets(bf, sizeof(bf), fp) == NULL)
 283                         break;
 284
 285                 if ((rdclock() - t) > timeout) {
 286                         pr_warning("Reading %s time out. "
 287                                    "You may want to increase "
 288                                    "the time limit by --proc-map-timeout\n",
 289                                    filename);
 290                         truncation = true;
 291                         goto out;
 292                 }
 293
 294                 /* ensure null termination since stack will be reused. */
 295                 strcpy(execname, "");
 296
 297                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 298                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 299                        &event->mmap2.start, &event->mmap2.len, prot,
 300                        &event->mmap2.pgoff, &event->mmap2.maj,
 301                        &event->mmap2.min,
 302                        &ino, execname);
 303
 304                 /*
 305                  * Anon maps don't have the execname.
 306                  */
 307                 if (n < 7)
 308                         continue;
 309
 310                 event->mmap2.ino = (u64)ino;
 311
 312                 /*
 313                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 314                  */
 315                 if (machine__is_host(machine))
 316                         event->header.misc = PERF_RECORD_MISC_USER;
 317                 else
 318                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 319
 320                 /* map protection and flags bits */
 321                 event->mmap2.prot = 0;
 322                 event->mmap2.flags = 0;
 323                 if (prot[0] == 'r')
 324                         event->mmap2.prot |= PROT_READ;
 325                 if (prot[1] == 'w')
 326                         event->mmap2.prot |= PROT_WRITE;
 327                 if (prot[2] == 'x')
 328                         event->mmap2.prot |= PROT_EXEC;
 329
 330                 if (prot[3] == 's')
 331                         event->mmap2.flags |= MAP_SHARED;
 332                 else
 333                         event->mmap2.flags |= MAP_PRIVATE;
 334
 335                 if (prot[2] != 'x') {
 336                         if (!mmap_data || prot[0] != 'r')
 337                                 continue;
 338
 339                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 340                 }
 341
 342 out:
 343                 if (truncation)
 344                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 345
 346                 if (!strcmp(execname, ""))
 347                         strcpy(execname, anonstr);
 348
 349                 if (!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 350                         strcpy(execname, anonstr);
 351                         event->mmap2.flags |= MAP_HUGETLB;
 352                 }
 353
 354                 size = strlen(execname) + 1;
 355                 memcpy(event->mmap2.filename, execname, size);
 356                 size = PERF_ALIGN(size, sizeof(u64));
 357                 event->mmap2.len -= event->mmap.start;
 358                 event->mmap2.header.size = (sizeof(event->mmap2) -
 359                                         (sizeof(event->mmap2.filename) - size));
 360                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 361                 event->mmap2.header.size += machine->id_hdr_size;
 362                 event->mmap2.pid = tgid;
 363                 event->mmap2.tid = pid;
 364
 365                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 366                         rc = -1;
 367                         break;
 368                 }
 369
 370                 if (truncation)
 371                         break;
 372         }
 373
 374         fclose(fp);
 375         return rc;
 376 }
 377
 378 int perf_event__synthesize_modules(struct perf_tool *tool,
 379                                    perf_event__handler_t process,
 380                                    struct machine *machine)
 381 {
 382         int rc = 0;
 383         struct map *pos;
 384         struct map_groups *kmaps = &machine->kmaps;
 385         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 386         union perf_event *event = zalloc((sizeof(event->mmap) +
 387                                           machine->id_hdr_size));
 388         if (event == NULL) {
 389                 pr_debug("Not enough memory synthesizing mmap event "
 390                          "for kernel modules\n");
 391                 return -1;
 392         }
 393
 394         event->header.type = PERF_RECORD_MMAP;
 395
 396         /*
 397          * kernel uses 0 for user space maps, see kernel/perf_event.c
 398          * __perf_event_mmap
 399          */
 400         if (machine__is_host(machine))
 401                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 402         else
 403                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 404
 405         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 406                 size_t size;
 407
 408                 if (__map__is_kernel(pos))
 409                         continue;
 410
 411                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 412                 event->mmap.header.type = PERF_RECORD_MMAP;
 413                 event->mmap.header.size = (sizeof(event->mmap) -
 414                                         (sizeof(event->mmap.filename) - size));
 415                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 416                 event->mmap.header.size += machine->id_hdr_size;
 417                 event->mmap.start = pos->start;
 418                 event->mmap.len   = pos->end - pos->start;
 419                 event->mmap.pid   = machine->pid;
 420
 421                 memcpy(event->mmap.filename, pos->dso->long_name,
 422                        pos->dso->long_name_len + 1);
 423                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 424                         rc = -1;
 425                         break;
 426                 }
 427         }
 428
 429         free(event);
 430         return rc;
 431 }
 432
 433 static int __event__synthesize_thread(union perf_event *comm_event,
 434                                       union perf_event *mmap_event,
 435                                       union perf_event *fork_event,
 436                                       pid_t pid, int full,
 437                                           perf_event__handler_t process,
 438                                       struct perf_tool *tool,
 439                                       struct machine *machine,
 440                                       bool mmap_data,
 441                                       unsigned int proc_map_timeout)
 442 {
 443         char filename[PATH_MAX];
 444         DIR *tasks;
 445         struct dirent *dirent;
 446         pid_t tgid, ppid;
 447         int rc = 0;
 448
 449         /* special case: only send one comm event using passed in pid */
 450         if (!full) {
 451                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 452                                                    process, machine);
 453
 454                 if (tgid == -1)
 455                         return -1;
 456
 457                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 458                                                           process, machine, mmap_data,
 459                                                           proc_map_timeout);
 460         }
 461
 462         if (machine__is_default_guest(machine))
 463                 return 0;
 464
 465         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 466                  machine->root_dir, pid);
 467
 468         tasks = opendir(filename);
 469         if (tasks == NULL) {
 470                 pr_debug("couldn't open %s\n", filename);
 471                 return 0;
 472         }
 473
 474         while ((dirent = readdir(tasks)) != NULL) {
 475                 char *end;
 476                 pid_t _pid;
 477
 478                 _pid = strtol(dirent->d_name, &end, 10);
 479                 if (*end)
 480                         continue;
 481
 482                 rc = -1;
 483                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 484                                              &tgid, &ppid) != 0)
 485                         break;
 486
 487                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 488                                                 ppid, process, machine) < 0)
 489                         break;
 490                 /*
 491                  * Send the prepared comm event
 492                  */
 493                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 494                         break;
 495
 496                 rc = 0;
 497                 if (_pid == pid) {
 498                         /* process the parent's maps too */
 499                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 500                                                 process, machine, mmap_data, proc_map_timeout);
 501                         if (rc)
 502                                 break;
 503                 }
 504         }
 505
 506         closedir(tasks);
 507         return rc;
 508 }
 509
 510 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 511                                       struct thread_map *threads,
 512                                       perf_event__handler_t process,
 513                                       struct machine *machine,
 514                                       bool mmap_data,
 515                                       unsigned int proc_map_timeout)
 516 {
 517         union perf_event *comm_event, *mmap_event, *fork_event;
 518         int err = -1, thread, j;
 519
 520         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 521         if (comm_event == NULL)
 522                 goto out;
 523
 524         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 525         if (mmap_event == NULL)
 526                 goto out_free_comm;
 527
 528         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 529         if (fork_event == NULL)
 530                 goto out_free_mmap;
 531
 532         err = 0;
 533         for (thread = 0; thread < threads->nr; ++thread) {
 534                 if (__event__synthesize_thread(comm_event, mmap_event,
 535                                                fork_event,
 536                                                thread_map__pid(threads, thread), 0,
 537                                                process, tool, machine,
 538                                                mmap_data, proc_map_timeout)) {
 539                         err = -1;
 540                         break;
 541                 }
 542
 543                 /*
 544                  * comm.pid is set to thread group id by
 545                  * perf_event__synthesize_comm
 546                  */
 547                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 548                         bool need_leader = true;
 549
 550                         /* is thread group leader in thread_map? */
 551                         for (j = 0; j < threads->nr; ++j) {
 552                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 553                                         need_leader = false;
 554                                         break;
 555                                 }
 556                         }
 557
 558                         /* if not, generate events for it */
 559                         if (need_leader &&
 560                             __event__synthesize_thread(comm_event, mmap_event,
 561                                                        fork_event,
 562                                                        comm_event->comm.pid, 0,
 563                                                        process, tool, machine,
 564                                                        mmap_data, proc_map_timeout)) {
 565                                 err = -1;
 566                                 break;
 567                         }
 568                 }
 569         }
 570         free(fork_event);
 571 out_free_mmap:
 572         free(mmap_event);
 573 out_free_comm:
 574         free(comm_event);
 575 out:
 576         return err;
 577 }
 578
 579 int perf_event__synthesize_threads(struct perf_tool *tool,
 580                                    perf_event__handler_t process,
 581                                    struct machine *machine,
 582                                    bool mmap_data,
 583                                    unsigned int proc_map_timeout)
 584 {
 585         DIR *proc;
 586         char proc_path[PATH_MAX];
 587         struct dirent *dirent;
 588         union perf_event *comm_event, *mmap_event, *fork_event;
 589         int err = -1;
 590
 591         if (machine__is_default_guest(machine))
 592                 return 0;
 593
 594         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 595         if (comm_event == NULL)
 596                 goto out;
 597
 598         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 599         if (mmap_event == NULL)
 600                 goto out_free_comm;
 601
 602         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 603         if (fork_event == NULL)
 604                 goto out_free_mmap;
 605
 606         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 607         proc = opendir(proc_path);
 608
 609         if (proc == NULL)
 610                 goto out_free_fork;
 611
 612         while ((dirent = readdir(proc)) != NULL) {
 613                 char *end;
 614                 pid_t pid = strtol(dirent->d_name, &end, 10);
 615
 616                 if (*end) /* only interested in proper numerical dirents */
 617                         continue;
 618                 /*
 619                  * We may race with exiting thread, so don't stop just because
 620                  * one thread couldn't be synthesized.
 621                  */
 622                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 623                                            1, process, tool, machine, mmap_data,
 624                                            proc_map_timeout);
 625         }
 626
 627         err = 0;
 628         closedir(proc);
 629 out_free_fork:
 630         free(fork_event);
 631 out_free_mmap:
 632         free(mmap_event);
 633 out_free_comm:
 634         free(comm_event);
 635 out:
 636         return err;
 637 }
 638
 639 struct process_symbol_args {
 640         const char *name;
 641         u64        start;
 642 };
 643
 644 static int find_symbol_cb(void *arg, const char *name, char type,
 645                           u64 start)
 646 {
 647         struct process_symbol_args *args = arg;
 648
 649         /*
 650          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 651          * an 'A' to the same address as "_stext".
 652          */
 653         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 654               type == 'A') || strcmp(name, args->name))
 655                 return 0;
 656
 657         args->start = start;
 658         return 1;
 659 }
 660
 661 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 662                                  const char *symbol_name)
 663 {
 664         struct process_symbol_args args = { .name = symbol_name, };
 665
 666         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 667                 return 0;
 668
 669         return args.start;
 670 }
 671
 672 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 673                                        perf_event__handler_t process,
 674                                        struct machine *machine)
 675 {
 676         size_t size;
 677         const char *mmap_name;
 678         char name_buff[PATH_MAX];
 679         struct map *map = machine__kernel_map(machine);
 680         struct kmap *kmap;
 681         int err;
 682         union perf_event *event;
 683
 684         if (symbol_conf.kptr_restrict)
 685                 return -1;
 686         if (map == NULL)
 687                 return -1;
 688
 689         /*
 690          * We should get this from /sys/kernel/sections/.text, but till that is
 691          * available use this, and after it is use this as a fallback for older
 692          * kernels.
 693          */
 694         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 695         if (event == NULL) {
 696                 pr_debug("Not enough memory synthesizing mmap event "
 697                          "for kernel modules\n");
 698                 return -1;
 699         }
 700
 701         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 702         if (machine__is_host(machine)) {
 703                 /*
 704                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 705                  * see kernel/perf_event.c __perf_event_mmap
 706                  */
 707                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 708         } else {
 709                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 710         }
 711
 712         kmap = map__kmap(map);
 713         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 714                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 715         size = PERF_ALIGN(size, sizeof(u64));
 716         event->mmap.header.type = PERF_RECORD_MMAP;
 717         event->mmap.header.size = (sizeof(event->mmap) -
 718                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 719         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 720         event->mmap.start = map->start;
 721         event->mmap.len   = map->end - event->mmap.start;
 722         event->mmap.pid   = machine->pid;
 723
 724         err = perf_tool__process_synth_event(tool, event, machine, process);
 725         free(event);
 726
 727         return err;
 728 }
 729
 730 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 731                                       struct thread_map *threads,
 732                                       perf_event__handler_t process,
 733                                       struct machine *machine)
 734 {
 735         union perf_event *event;
 736         int i, err, size;
 737
 738         size  = sizeof(event->thread_map);
 739         size += threads->nr * sizeof(event->thread_map.entries[0]);
 740
 741         event = zalloc(size);
 742         if (!event)
 743                 return -ENOMEM;
 744
 745         event->header.type = PERF_RECORD_THREAD_MAP;
 746         event->header.size = size;
 747         event->thread_map.nr = threads->nr;
 748
 749         for (i = 0; i < threads->nr; i++) {
 750                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 751                 char *comm = thread_map__comm(threads, i);
 752
 753                 if (!comm)
 754                         comm = (char *) "";
 755
 756                 entry->pid = thread_map__pid(threads, i);
 757                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 758         }
 759
 760         err = process(tool, event, NULL, machine);
 761
 762         free(event);
 763         return err;
 764 }
 765
 766 static void synthesize_cpus(struct cpu_map_entries *cpus,
 767                             struct cpu_map *map)
 768 {
 769         int i;
 770
 771         cpus->nr = map->nr;
 772
 773         for (i = 0; i < map->nr; i++)
 774                 cpus->cpu[i] = map->map[i];
 775 }
 776
 777 static void synthesize_mask(struct cpu_map_mask *mask,
 778                             struct cpu_map *map, int max)
 779 {
 780         int i;
 781
 782         mask->nr = BITS_TO_LONGS(max);
 783         mask->long_size = sizeof(long);
 784
 785         for (i = 0; i < map->nr; i++)
 786                 set_bit(map->map[i], mask->mask);
 787 }
 788
 789 static size_t cpus_size(struct cpu_map *map)
 790 {
 791         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
 792 }
 793
 794 static size_t mask_size(struct cpu_map *map, int *max)
 795 {
 796         int i;
 797
 798         *max = 0;
 799
 800         for (i = 0; i < map->nr; i++) {
 801                 /* bit possition of the cpu is + 1 */
 802                 int bit = map->map[i] + 1;
 803
 804                 if (bit > *max)
 805                         *max = bit;
 806         }
 807
 808         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
 809 }
 810
 811 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
 812 {
 813         size_t size_cpus, size_mask;
 814         bool is_dummy = cpu_map__empty(map);
 815
 816         /*
 817          * Both array and mask data have variable size based
 818          * on the number of cpus and their actual values.
 819          * The size of the 'struct cpu_map_data' is:
 820          *
 821          *   array = size of 'struct cpu_map_entries' +
 822          *           number of cpus * sizeof(u64)
 823          *
 824          *   mask  = size of 'struct cpu_map_mask' +
 825          *           maximum cpu bit converted to size of longs
 826          *
 827          * and finaly + the size of 'struct cpu_map_data'.
 828          */
 829         size_cpus = cpus_size(map);
 830         size_mask = mask_size(map, max);
 831
 832         if (is_dummy || (size_cpus < size_mask)) {
 833                 *size += size_cpus;
 834                 *type  = PERF_CPU_MAP__CPUS;
 835         } else {
 836                 *size += size_mask;
 837                 *type  = PERF_CPU_MAP__MASK;
 838         }
 839
 840         *size += sizeof(struct cpu_map_data);
 841         return zalloc(*size);
 842 }
 843
 844 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
 845                               u16 type, int max)
 846 {
 847         data->type = type;
 848
 849         switch (type) {
 850         case PERF_CPU_MAP__CPUS:
 851                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
 852                 break;
 853         case PERF_CPU_MAP__MASK:
 854                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
 855         default:
 856                 break;
 857         };
 858 }
 859
 860 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
 861 {
 862         size_t size = sizeof(struct cpu_map_event);
 863         struct cpu_map_event *event;
 864         int max;
 865         u16 type;
 866
 867         event = cpu_map_data__alloc(map, &size, &type, &max);
 868         if (!event)
 869                 return NULL;
 870
 871         event->header.type = PERF_RECORD_CPU_MAP;
 872         event->header.size = size;
 873         event->data.type   = type;
 874
 875         cpu_map_data__synthesize(&event->data, map, type, max);
 876         return event;
 877 }
 878
 879 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
 880                                    struct cpu_map *map,
 881                                    perf_event__handler_t process,
 882                                    struct machine *machine)
 883 {
 884         struct cpu_map_event *event;
 885         int err;
 886
 887         event = cpu_map_event__new(map);
 888         if (!event)
 889                 return -ENOMEM;
 890
 891         err = process(tool, (union perf_event *) event, NULL, machine);
 892
 893         free(event);
 894         return err;
 895 }
 896
 897 int perf_event__synthesize_stat_config(struct perf_tool *tool,
 898                                        struct perf_stat_config *config,
 899                                        perf_event__handler_t process,
 900                                        struct machine *machine)
 901 {
 902         struct stat_config_event *event;
 903         int size, i = 0, err;
 904
 905         size  = sizeof(*event);
 906         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
 907
 908         event = zalloc(size);
 909         if (!event)
 910                 return -ENOMEM;
 911
 912         event->header.type = PERF_RECORD_STAT_CONFIG;
 913         event->header.size = size;
 914         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
 915
 916 #define ADD(__term, __val)                                      \
 917         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
 918         event->data[i].val = __val;                             \
 919         i++;
 920
 921         ADD(AGGR_MODE,  config->aggr_mode)
 922         ADD(INTERVAL,   config->interval)
 923         ADD(SCALE,      config->scale)
 924
 925         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
 926                   "stat config terms unbalanced\n");
 927 #undef ADD
 928
 929         err = process(tool, (union perf_event *) event, NULL, machine);
 930
 931         free(event);
 932         return err;
 933 }
 934
 935 int perf_event__synthesize_stat(struct perf_tool *tool,
 936                                 u32 cpu, u32 thread, u64 id,
 937                                 struct perf_counts_values *count,
 938                                 perf_event__handler_t process,
 939                                 struct machine *machine)
 940 {
 941         struct stat_event event;
 942
 943         event.header.type = PERF_RECORD_STAT;
 944         event.header.size = sizeof(event);
 945         event.header.misc = 0;
 946
 947         event.id        = id;
 948         event.cpu       = cpu;
 949         event.thread    = thread;
 950         event.val       = count->val;
 951         event.ena       = count->ena;
 952         event.run       = count->run;
 953
 954         return process(tool, (union perf_event *) &event, NULL, machine);
 955 }
 956
 957 int perf_event__synthesize_stat_round(struct perf_tool *tool,
 958                                       u64 evtime, u64 type,
 959                                       perf_event__handler_t process,
 960                                       struct machine *machine)
 961 {
 962         struct stat_round_event event;
 963
 964         event.header.type = PERF_RECORD_STAT_ROUND;
 965         event.header.size = sizeof(event);
 966         event.header.misc = 0;
 967
 968         event.time = evtime;
 969         event.type = type;
 970
 971         return process(tool, (union perf_event *) &event, NULL, machine);
 972 }
 973
 974 void perf_event__read_stat_config(struct perf_stat_config *config,
 975                                   struct stat_config_event *event)
 976 {
 977         unsigned i;
 978
 979         for (i = 0; i < event->nr; i++) {
 980
 981                 switch (event->data[i].tag) {
 982 #define CASE(__term, __val)                                     \
 983                 case PERF_STAT_CONFIG_TERM__##__term:           \
 984                         config->__val = event->data[i].val;     \
 985                         break;
 986
 987                 CASE(AGGR_MODE, aggr_mode)
 988                 CASE(SCALE,     scale)
 989                 CASE(INTERVAL,  interval)
 990 #undef CASE
 991                 default:
 992                         pr_warning("unknown stat config term %" PRIu64 "\n",
 993                                    event->data[i].tag);
 994                 }
 995         }
 996 }
 997
 998 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 999 {
1000         const char *s;
1001
1002         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1003                 s = " exec";
1004         else
1005                 s = "";
1006
1007         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1008 }
1009
1010 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1011                              union perf_event *event,
1012                              struct perf_sample *sample,
1013                              struct machine *machine)
1014 {
1015         return machine__process_comm_event(machine, event, sample);
1016 }
1017
1018 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1019                              union perf_event *event,
1020                              struct perf_sample *sample,
1021                              struct machine *machine)
1022 {
1023         return machine__process_lost_event(machine, event, sample);
1024 }
1025
1026 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1027                             union perf_event *event,
1028                             struct perf_sample *sample __maybe_unused,
1029                             struct machine *machine)
1030 {
1031         return machine__process_aux_event(machine, event);
1032 }
1033
1034 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1035                                      union perf_event *event,
1036                                      struct perf_sample *sample __maybe_unused,
1037                                      struct machine *machine)
1038 {
1039         return machine__process_itrace_start_event(machine, event);
1040 }
1041
1042 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1043                                      union perf_event *event,
1044                                      struct perf_sample *sample,
1045                                      struct machine *machine)
1046 {
1047         return machine__process_lost_samples_event(machine, event, sample);
1048 }
1049
1050 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1051                                union perf_event *event,
1052                                struct perf_sample *sample __maybe_unused,
1053                                struct machine *machine)
1054 {
1055         return machine__process_switch_event(machine, event);
1056 }
1057
1058 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1059 {
1060         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1061                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1062                        event->mmap.len, event->mmap.pgoff,
1063                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1064                        event->mmap.filename);
1065 }
1066
1067 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1068 {
1069         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1070                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1071                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1072                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1073                        event->mmap2.min, event->mmap2.ino,
1074                        event->mmap2.ino_generation,
1075                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1076                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1077                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1078                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1079                        event->mmap2.filename);
1080 }
1081
1082 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1083 {
1084         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1085         size_t ret;
1086
1087         ret = fprintf(fp, " nr: ");
1088
1089         if (threads)
1090                 ret += thread_map__fprintf(threads, fp);
1091         else
1092                 ret += fprintf(fp, "failed to get threads from event\n");
1093
1094         thread_map__put(threads);
1095         return ret;
1096 }
1097
1098 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1099 {
1100         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1101         size_t ret;
1102
1103         ret = fprintf(fp, ": ");
1104
1105         if (cpus)
1106                 ret += cpu_map__fprintf(cpus, fp);
1107         else
1108                 ret += fprintf(fp, "failed to get cpumap from event\n");
1109
1110         cpu_map__put(cpus);
1111         return ret;
1112 }
1113
1114 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1115                              union perf_event *event,
1116                              struct perf_sample *sample,
1117                              struct machine *machine)
1118 {
1119         return machine__process_mmap_event(machine, event, sample);
1120 }
1121
1122 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1123                              union perf_event *event,
1124                              struct perf_sample *sample,
1125                              struct machine *machine)
1126 {
1127         return machine__process_mmap2_event(machine, event, sample);
1128 }
1129
1130 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1131 {
1132         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1133                        event->fork.pid, event->fork.tid,
1134                        event->fork.ppid, event->fork.ptid);
1135 }
1136
1137 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1138                              union perf_event *event,
1139                              struct perf_sample *sample,
1140                              struct machine *machine)
1141 {
1142         return machine__process_fork_event(machine, event, sample);
1143 }
1144
1145 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1146                              union perf_event *event,
1147                              struct perf_sample *sample,
1148                              struct machine *machine)
1149 {
1150         return machine__process_exit_event(machine, event, sample);
1151 }
1152
1153 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1154 {
1155         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1156                        event->aux.aux_offset, event->aux.aux_size,
1157                        event->aux.flags,
1158                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1159                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1160 }
1161
1162 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1163 {
1164         return fprintf(fp, " pid: %u tid: %u\n",
1165                        event->itrace_start.pid, event->itrace_start.tid);
1166 }
1167
1168 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1169 {
1170         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1171         const char *in_out = out ? "OUT" : "IN ";
1172
1173         if (event->header.type == PERF_RECORD_SWITCH)
1174                 return fprintf(fp, " %s\n", in_out);
1175
1176         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1177                        in_out, out ? "next" : "prev",
1178                        event->context_switch.next_prev_pid,
1179                        event->context_switch.next_prev_tid);
1180 }
1181
1182 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1183 {
1184         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1185                              perf_event__name(event->header.type));
1186
1187         switch (event->header.type) {
1188         case PERF_RECORD_COMM:
1189                 ret += perf_event__fprintf_comm(event, fp);
1190                 break;
1191         case PERF_RECORD_FORK:
1192         case PERF_RECORD_EXIT:
1193                 ret += perf_event__fprintf_task(event, fp);
1194                 break;
1195         case PERF_RECORD_MMAP:
1196                 ret += perf_event__fprintf_mmap(event, fp);
1197                 break;
1198         case PERF_RECORD_MMAP2:
1199                 ret += perf_event__fprintf_mmap2(event, fp);
1200                 break;
1201         case PERF_RECORD_AUX:
1202                 ret += perf_event__fprintf_aux(event, fp);
1203                 break;
1204         case PERF_RECORD_ITRACE_START:
1205                 ret += perf_event__fprintf_itrace_start(event, fp);
1206                 break;
1207         case PERF_RECORD_SWITCH:
1208         case PERF_RECORD_SWITCH_CPU_WIDE:
1209                 ret += perf_event__fprintf_switch(event, fp);
1210                 break;
1211         default:
1212                 ret += fprintf(fp, "\n");
1213         }
1214
1215         return ret;
1216 }
1217
1218 int perf_event__process(struct perf_tool *tool __maybe_unused,
1219                         union perf_event *event,
1220                         struct perf_sample *sample,
1221                         struct machine *machine)
1222 {
1223         return machine__process_event(machine, event, sample);
1224 }
1225
1226 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1227                            enum map_type type, u64 addr,
1228                            struct addr_location *al)
1229 {
1230         struct map_groups *mg = thread->mg;
1231         struct machine *machine = mg->machine;
1232         bool load_map = false;
1233
1234         al->machine = machine;
1235         al->thread = thread;
1236         al->addr = addr;
1237         al->cpumode = cpumode;
1238         al->filtered = 0;
1239
1240         if (machine == NULL) {
1241                 al->map = NULL;
1242                 return;
1243         }
1244
1245         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1246                 al->level = 'k';
1247                 mg = &machine->kmaps;
1248                 load_map = true;
1249         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1250                 al->level = '.';
1251         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1252                 al->level = 'g';
1253                 mg = &machine->kmaps;
1254                 load_map = true;
1255         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1256                 al->level = 'u';
1257         } else {
1258                 al->level = 'H';
1259                 al->map = NULL;
1260
1261                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1262                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1263                         !perf_guest)
1264                         al->filtered |= (1 << HIST_FILTER__GUEST);
1265                 if ((cpumode == PERF_RECORD_MISC_USER ||
1266                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1267                         !perf_host)
1268                         al->filtered |= (1 << HIST_FILTER__HOST);
1269
1270                 return;
1271         }
1272 try_again:
1273         al->map = map_groups__find(mg, type, al->addr);
1274         if (al->map == NULL) {
1275                 /*
1276                  * If this is outside of all known maps, and is a negative
1277                  * address, try to look it up in the kernel dso, as it might be
1278                  * a vsyscall or vdso (which executes in user-mode).
1279                  *
1280                  * XXX This is nasty, we should have a symbol list in the
1281                  * "[vdso]" dso, but for now lets use the old trick of looking
1282                  * in the whole kernel symbol list.
1283                  */
1284                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1285                     mg != &machine->kmaps &&
1286                     machine__kernel_ip(machine, al->addr)) {
1287                         mg = &machine->kmaps;
1288                         load_map = true;
1289                         goto try_again;
1290                 }
1291         } else {
1292                 /*
1293                  * Kernel maps might be changed when loading symbols so loading
1294                  * must be done prior to using kernel maps.
1295                  */
1296                 if (load_map)
1297                         map__load(al->map);
1298                 al->addr = al->map->map_ip(al->map, al->addr);
1299         }
1300 }
1301
1302 void thread__find_addr_location(struct thread *thread,
1303                                 u8 cpumode, enum map_type type, u64 addr,
1304                                 struct addr_location *al)
1305 {
1306         thread__find_addr_map(thread, cpumode, type, addr, al);
1307         if (al->map != NULL)
1308                 al->sym = map__find_symbol(al->map, al->addr);
1309         else
1310                 al->sym = NULL;
1311 }
1312
1313 /*
1314  * Callers need to drop the reference to al->thread, obtained in
1315  * machine__findnew_thread()
1316  */
1317 int machine__resolve(struct machine *machine, struct addr_location *al,
1318                      struct perf_sample *sample)
1319 {
1320         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1321                                                         sample->tid);
1322
1323         if (thread == NULL)
1324                 return -1;
1325
1326         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1327         /*
1328          * Have we already created the kernel maps for this machine?
1329          *
1330          * This should have happened earlier, when we processed the kernel MMAP
1331          * events, but for older perf.data files there was no such thing, so do
1332          * it now.
1333          */
1334         if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1335             machine__kernel_map(machine) == NULL)
1336                 machine__create_kernel_maps(machine);
1337
1338         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1339         dump_printf(" ...... dso: %s\n",
1340                     al->map ? al->map->dso->long_name :
1341                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1342
1343         if (thread__is_filtered(thread))
1344                 al->filtered |= (1 << HIST_FILTER__THREAD);
1345
1346         al->sym = NULL;
1347         al->cpu = sample->cpu;
1348         al->socket = -1;
1349
1350         if (al->cpu >= 0) {
1351                 struct perf_env *env = machine->env;
1352
1353                 if (env && env->cpu)
1354                         al->socket = env->cpu[al->cpu].socket_id;
1355         }
1356
1357         if (al->map) {
1358                 struct dso *dso = al->map->dso;
1359
1360                 if (symbol_conf.dso_list &&
1361                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1362                                                   dso->short_name) ||
1363                                (dso->short_name != dso->long_name &&
1364                                 strlist__has_entry(symbol_conf.dso_list,
1365                                                    dso->long_name))))) {
1366                         al->filtered |= (1 << HIST_FILTER__DSO);
1367                 }
1368
1369                 al->sym = map__find_symbol(al->map, al->addr);
1370         }
1371
1372         if (symbol_conf.sym_list &&
1373                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1374                                                 al->sym->name))) {
1375                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1376         }
1377
1378         return 0;
1379 }
1380
1381 /*
1382  * The preprocess_sample method will return with reference counts for the
1383  * in it, when done using (and perhaps getting ref counts if needing to
1384  * keep a pointer to one of those entries) it must be paired with
1385  * addr_location__put(), so that the refcounts can be decremented.
1386  */
1387 void addr_location__put(struct addr_location *al)
1388 {
1389         thread__zput(al->thread);
1390 }
1391
1392 bool is_bts_event(struct perf_event_attr *attr)
1393 {
1394         return attr->type == PERF_TYPE_HARDWARE &&
1395                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1396                attr->sample_period == 1;
1397 }
1398
1399 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1400 {
1401         if (attr->type == PERF_TYPE_SOFTWARE &&
1402             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1403              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1404              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1405                 return true;
1406
1407         if (is_bts_event(attr))
1408                 return true;
1409
1410         return false;
1411 }
1412
1413 void thread__resolve(struct thread *thread, struct addr_location *al,
1414                      struct perf_sample *sample)
1415 {
1416         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1417         if (!al->map)
1418                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1419                                       sample->addr, al);
1420
1421         al->cpu = sample->cpu;
1422         al->sym = NULL;
1423
1424         if (al->map)
1425                 al->sym = map__find_symbol(al->map, al->addr);
1426 }