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
  14 static const char *perf_event__names[] = {
  15         [0]                                     = "TOTAL",
  16         [PERF_RECORD_MMAP]                      = "MMAP",
  17         [PERF_RECORD_MMAP2]                     = "MMAP2",
  18         [PERF_RECORD_LOST]                      = "LOST",
  19         [PERF_RECORD_COMM]                      = "COMM",
  20         [PERF_RECORD_EXIT]                      = "EXIT",
  21         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  22         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  23         [PERF_RECORD_FORK]                      = "FORK",
  24         [PERF_RECORD_READ]                      = "READ",
  25         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  26         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  27         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  28         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  29         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  30         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  31         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  32 };
  33
  34 const char *perf_event__name(unsigned int id)
  35 {
  36         if (id >= ARRAY_SIZE(perf_event__names))
  37                 return "INVALID";
  38         if (!perf_event__names[id])
  39                 return "UNKNOWN";
  40         return perf_event__names[id];
  41 }
  42
  43 static struct perf_sample synth_sample = {
  44         .pid       = -1,
  45         .tid       = -1,
  46         .time      = -1,
  47         .stream_id = -1,
  48         .cpu       = -1,
  49         .period    = 1,
  50 };
  51
  52 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
  53 {
  54         char filename[PATH_MAX];
  55         char bf[BUFSIZ];
  56         FILE *fp;
  57         size_t size = 0;
  58         pid_t tgid = -1;
  59
  60         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  61
  62         fp = fopen(filename, "r");
  63         if (fp == NULL) {
  64                 pr_debug("couldn't open %s\n", filename);
  65                 return 0;
  66         }
  67
  68         while (!comm[0] || (tgid < 0)) {
  69                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  70                         pr_warning("couldn't get COMM and pgid, malformed %s\n",
  71                                    filename);
  72                         break;
  73                 }
  74
  75                 if (memcmp(bf, "Name:", 5) == 0) {
  76                         char *name = bf + 5;
  77                         while (*name && isspace(*name))
  78                                 ++name;
  79                         size = strlen(name) - 1;
  80                         if (size >= len)
  81                                 size = len - 1;
  82                         memcpy(comm, name, size);
  83                         comm[size] = '\0';
  84
  85                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  86                         char *tgids = bf + 5;
  87                         while (*tgids && isspace(*tgids))
  88                                 ++tgids;
  89                         tgid = atoi(tgids);
  90                 }
  91         }
  92
  93         fclose(fp);
  94
  95         return tgid;
  96 }
  97
  98 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
  99                                          union perf_event *event, pid_t pid,
 100                                          perf_event__handler_t process,
 101                                          struct machine *machine)
 102 {
 103         size_t size;
 104         pid_t tgid;
 105
 106         memset(&event->comm, 0, sizeof(event->comm));
 107
 108         if (machine__is_host(machine))
 109                 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
 110                                                  sizeof(event->comm.comm));
 111         else
 112                 tgid = machine->pid;
 113
 114         if (tgid < 0)
 115                 goto out;
 116
 117         event->comm.pid = tgid;
 118         event->comm.header.type = PERF_RECORD_COMM;
 119
 120         size = strlen(event->comm.comm) + 1;
 121         size = PERF_ALIGN(size, sizeof(u64));
 122         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 123         event->comm.header.size = (sizeof(event->comm) -
 124                                 (sizeof(event->comm.comm) - size) +
 125                                 machine->id_hdr_size);
 126         event->comm.tid = pid;
 127
 128         if (process(tool, event, &synth_sample, machine) != 0)
 129                 return -1;
 130
 131 out:
 132         return tgid;
 133 }
 134
 135 static int perf_event__synthesize_fork(struct perf_tool *tool,
 136                                        union perf_event *event, pid_t pid,
 137                                        pid_t tgid, perf_event__handler_t process,
 138                                        struct machine *machine)
 139 {
 140         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 141
 142         /* this is really a clone event but we use fork to synthesize it */
 143         event->fork.ppid = tgid;
 144         event->fork.ptid = tgid;
 145         event->fork.pid  = tgid;
 146         event->fork.tid  = pid;
 147         event->fork.header.type = PERF_RECORD_FORK;
 148
 149         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 150
 151         if (process(tool, event, &synth_sample, machine) != 0)
 152                 return -1;
 153
 154         return 0;
 155 }
 156
 157 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 158                                        union perf_event *event,
 159                                        pid_t pid, pid_t tgid,
 160                                        perf_event__handler_t process,
 161                                        struct machine *machine,
 162                                        bool mmap_data)
 163 {
 164         char filename[PATH_MAX];
 165         FILE *fp;
 166         int rc = 0;
 167
 168         if (machine__is_default_guest(machine))
 169                 return 0;
 170
 171         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 172                  machine->root_dir, pid);
 173
 174         fp = fopen(filename, "r");
 175         if (fp == NULL) {
 176                 /*
 177                  * We raced with a task exiting - just return:
 178                  */
 179                 pr_debug("couldn't open %s\n", filename);
 180                 return -1;
 181         }
 182
 183         event->header.type = PERF_RECORD_MMAP2;
 184
 185         while (1) {
 186                 char bf[BUFSIZ];
 187                 char prot[5];
 188                 char execname[PATH_MAX];
 189                 char anonstr[] = "//anon";
 190                 unsigned int ino;
 191                 size_t size;
 192                 ssize_t n;
 193
 194                 if (fgets(bf, sizeof(bf), fp) == NULL)
 195                         break;
 196
 197                 /* ensure null termination since stack will be reused. */
 198                 strcpy(execname, "");
 199
 200                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 201                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
 202                        &event->mmap2.start, &event->mmap2.len, prot,
 203                        &event->mmap2.pgoff, &event->mmap2.maj,
 204                        &event->mmap2.min,
 205                        &ino, execname);
 206
 207                 /*
 208                  * Anon maps don't have the execname.
 209                  */
 210                 if (n < 7)
 211                         continue;
 212
 213                 event->mmap2.ino = (u64)ino;
 214
 215                 /*
 216                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 217                  */
 218                 if (machine__is_host(machine))
 219                         event->header.misc = PERF_RECORD_MISC_USER;
 220                 else
 221                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 222
 223                 /* map protection and flags bits */
 224                 event->mmap2.prot = 0;
 225                 event->mmap2.flags = 0;
 226                 if (prot[0] == 'r')
 227                         event->mmap2.prot |= PROT_READ;
 228                 if (prot[1] == 'w')
 229                         event->mmap2.prot |= PROT_WRITE;
 230                 if (prot[2] == 'x')
 231                         event->mmap2.prot |= PROT_EXEC;
 232
 233                 if (prot[3] == 's')
 234                         event->mmap2.flags |= MAP_SHARED;
 235                 else
 236                         event->mmap2.flags |= MAP_PRIVATE;
 237
 238                 if (prot[2] != 'x') {
 239                         if (!mmap_data || prot[0] != 'r')
 240                                 continue;
 241
 242                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 243                 }
 244
 245                 if (!strcmp(execname, ""))
 246                         strcpy(execname, anonstr);
 247
 248                 size = strlen(execname) + 1;
 249                 memcpy(event->mmap2.filename, execname, size);
 250                 size = PERF_ALIGN(size, sizeof(u64));
 251                 event->mmap2.len -= event->mmap.start;
 252                 event->mmap2.header.size = (sizeof(event->mmap2) -
 253                                         (sizeof(event->mmap2.filename) - size));
 254                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 255                 event->mmap2.header.size += machine->id_hdr_size;
 256                 event->mmap2.pid = tgid;
 257                 event->mmap2.tid = pid;
 258
 259                 if (process(tool, event, &synth_sample, machine) != 0) {
 260                         rc = -1;
 261                         break;
 262                 }
 263         }
 264
 265         fclose(fp);
 266         return rc;
 267 }
 268
 269 int perf_event__synthesize_modules(struct perf_tool *tool,
 270                                    perf_event__handler_t process,
 271                                    struct machine *machine)
 272 {
 273         int rc = 0;
 274         struct rb_node *nd;
 275         struct map_groups *kmaps = &machine->kmaps;
 276         union perf_event *event = zalloc((sizeof(event->mmap) +
 277                                           machine->id_hdr_size));
 278         if (event == NULL) {
 279                 pr_debug("Not enough memory synthesizing mmap event "
 280                          "for kernel modules\n");
 281                 return -1;
 282         }
 283
 284         event->header.type = PERF_RECORD_MMAP;
 285
 286         /*
 287          * kernel uses 0 for user space maps, see kernel/perf_event.c
 288          * __perf_event_mmap
 289          */
 290         if (machine__is_host(machine))
 291                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 292         else
 293                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 294
 295         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 296              nd; nd = rb_next(nd)) {
 297                 size_t size;
 298                 struct map *pos = rb_entry(nd, struct map, rb_node);
 299
 300                 if (pos->dso->kernel)
 301                         continue;
 302
 303                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 304                 event->mmap.header.type = PERF_RECORD_MMAP;
 305                 event->mmap.header.size = (sizeof(event->mmap) -
 306                                         (sizeof(event->mmap.filename) - size));
 307                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 308                 event->mmap.header.size += machine->id_hdr_size;
 309                 event->mmap.start = pos->start;
 310                 event->mmap.len   = pos->end - pos->start;
 311                 event->mmap.pid   = machine->pid;
 312
 313                 memcpy(event->mmap.filename, pos->dso->long_name,
 314                        pos->dso->long_name_len + 1);
 315                 if (process(tool, event, &synth_sample, machine) != 0) {
 316                         rc = -1;
 317                         break;
 318                 }
 319         }
 320
 321         free(event);
 322         return rc;
 323 }
 324
 325 static int __event__synthesize_thread(union perf_event *comm_event,
 326                                       union perf_event *mmap_event,
 327                                       union perf_event *fork_event,
 328                                       pid_t pid, int full,
 329                                           perf_event__handler_t process,
 330                                       struct perf_tool *tool,
 331                                       struct machine *machine, bool mmap_data)
 332 {
 333         char filename[PATH_MAX];
 334         DIR *tasks;
 335         struct dirent dirent, *next;
 336         pid_t tgid;
 337
 338         /* special case: only send one comm event using passed in pid */
 339         if (!full) {
 340                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 341                                                    process, machine);
 342
 343                 if (tgid == -1)
 344                         return -1;
 345
 346                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 347                                                           process, machine, mmap_data);
 348         }
 349
 350         if (machine__is_default_guest(machine))
 351                 return 0;
 352
 353         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 354                  machine->root_dir, pid);
 355
 356         tasks = opendir(filename);
 357         if (tasks == NULL) {
 358                 pr_debug("couldn't open %s\n", filename);
 359                 return 0;
 360         }
 361
 362         while (!readdir_r(tasks, &dirent, &next) && next) {
 363                 char *end;
 364                 int rc = 0;
 365                 pid_t _pid;
 366
 367                 _pid = strtol(dirent.d_name, &end, 10);
 368                 if (*end)
 369                         continue;
 370
 371                 tgid = perf_event__synthesize_comm(tool, comm_event, _pid,
 372                                                    process, machine);
 373                 if (tgid == -1)
 374                         return -1;
 375
 376                 if (_pid == pid) {
 377                         /* process the parent's maps too */
 378                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 379                                                 process, machine, mmap_data);
 380                 } else {
 381                         /* only fork the tid's map, to save time */
 382                         rc = perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 383                                                  process, machine);
 384                 }
 385
 386                 if (rc)
 387                         return rc;
 388         }
 389
 390         closedir(tasks);
 391         return 0;
 392 }
 393
 394 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 395                                       struct thread_map *threads,
 396                                       perf_event__handler_t process,
 397                                       struct machine *machine,
 398                                       bool mmap_data)
 399 {
 400         union perf_event *comm_event, *mmap_event, *fork_event;
 401         int err = -1, thread, j;
 402
 403         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 404         if (comm_event == NULL)
 405                 goto out;
 406
 407         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 408         if (mmap_event == NULL)
 409                 goto out_free_comm;
 410
 411         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 412         if (fork_event == NULL)
 413                 goto out_free_mmap;
 414
 415         err = 0;
 416         for (thread = 0; thread < threads->nr; ++thread) {
 417                 if (__event__synthesize_thread(comm_event, mmap_event,
 418                                                fork_event,
 419                                                threads->map[thread], 0,
 420                                                process, tool, machine,
 421                                                mmap_data)) {
 422                         err = -1;
 423                         break;
 424                 }
 425
 426                 /*
 427                  * comm.pid is set to thread group id by
 428                  * perf_event__synthesize_comm
 429                  */
 430                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 431                         bool need_leader = true;
 432
 433                         /* is thread group leader in thread_map? */
 434                         for (j = 0; j < threads->nr; ++j) {
 435                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 436                                         need_leader = false;
 437                                         break;
 438                                 }
 439                         }
 440
 441                         /* if not, generate events for it */
 442                         if (need_leader &&
 443                             __event__synthesize_thread(comm_event, mmap_event,
 444                                                        fork_event,
 445                                                        comm_event->comm.pid, 0,
 446                                                        process, tool, machine,
 447                                                        mmap_data)) {
 448                                 err = -1;
 449                                 break;
 450                         }
 451                 }
 452         }
 453         free(fork_event);
 454 out_free_mmap:
 455         free(mmap_event);
 456 out_free_comm:
 457         free(comm_event);
 458 out:
 459         return err;
 460 }
 461
 462 int perf_event__synthesize_threads(struct perf_tool *tool,
 463                                    perf_event__handler_t process,
 464                                    struct machine *machine, bool mmap_data)
 465 {
 466         DIR *proc;
 467         char proc_path[PATH_MAX];
 468         struct dirent dirent, *next;
 469         union perf_event *comm_event, *mmap_event, *fork_event;
 470         int err = -1;
 471
 472         if (machine__is_default_guest(machine))
 473                 return 0;
 474
 475         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 476         if (comm_event == NULL)
 477                 goto out;
 478
 479         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 480         if (mmap_event == NULL)
 481                 goto out_free_comm;
 482
 483         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 484         if (fork_event == NULL)
 485                 goto out_free_mmap;
 486
 487         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 488         proc = opendir(proc_path);
 489
 490         if (proc == NULL)
 491                 goto out_free_fork;
 492
 493         while (!readdir_r(proc, &dirent, &next) && next) {
 494                 char *end;
 495                 pid_t pid = strtol(dirent.d_name, &end, 10);
 496
 497                 if (*end) /* only interested in proper numerical dirents */
 498                         continue;
 499                 /*
 500                  * We may race with exiting thread, so don't stop just because
 501                  * one thread couldn't be synthesized.
 502                  */
 503                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 504                                            1, process, tool, machine, mmap_data);
 505         }
 506
 507         err = 0;
 508         closedir(proc);
 509 out_free_fork:
 510         free(fork_event);
 511 out_free_mmap:
 512         free(mmap_event);
 513 out_free_comm:
 514         free(comm_event);
 515 out:
 516         return err;
 517 }
 518
 519 struct process_symbol_args {
 520         const char *name;
 521         u64        start;
 522 };
 523
 524 static int find_symbol_cb(void *arg, const char *name, char type,
 525                           u64 start)
 526 {
 527         struct process_symbol_args *args = arg;
 528
 529         /*
 530          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 531          * an 'A' to the same address as "_stext".
 532          */
 533         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 534               type == 'A') || strcmp(name, args->name))
 535                 return 0;
 536
 537         args->start = start;
 538         return 1;
 539 }
 540
 541 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 542                                  const char *symbol_name)
 543 {
 544         struct process_symbol_args args = { .name = symbol_name, };
 545
 546         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 547                 return 0;
 548
 549         return args.start;
 550 }
 551
 552 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 553                                        perf_event__handler_t process,
 554                                        struct machine *machine)
 555 {
 556         size_t size;
 557         const char *mmap_name;
 558         char name_buff[PATH_MAX];
 559         struct map *map;
 560         struct kmap *kmap;
 561         int err;
 562         union perf_event *event;
 563
 564         if (machine->vmlinux_maps[0] == NULL)
 565                 return -1;
 566
 567         /*
 568          * We should get this from /sys/kernel/sections/.text, but till that is
 569          * available use this, and after it is use this as a fallback for older
 570          * kernels.
 571          */
 572         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 573         if (event == NULL) {
 574                 pr_debug("Not enough memory synthesizing mmap event "
 575                          "for kernel modules\n");
 576                 return -1;
 577         }
 578
 579         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 580         if (machine__is_host(machine)) {
 581                 /*
 582                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 583                  * see kernel/perf_event.c __perf_event_mmap
 584                  */
 585                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 586         } else {
 587                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 588         }
 589
 590         map = machine->vmlinux_maps[MAP__FUNCTION];
 591         kmap = map__kmap(map);
 592         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 593                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 594         size = PERF_ALIGN(size, sizeof(u64));
 595         event->mmap.header.type = PERF_RECORD_MMAP;
 596         event->mmap.header.size = (sizeof(event->mmap) -
 597                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 598         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 599         event->mmap.start = map->start;
 600         event->mmap.len   = map->end - event->mmap.start;
 601         event->mmap.pid   = machine->pid;
 602
 603         err = process(tool, event, &synth_sample, machine);
 604         free(event);
 605
 606         return err;
 607 }
 608
 609 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 610 {
 611         const char *s;
 612
 613         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
 614                 s = " exec";
 615         else
 616                 s = "";
 617
 618         return fprintf(fp, "%s: %s:%d\n", s, event->comm.comm, event->comm.tid);
 619 }
 620
 621 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 622                              union perf_event *event,
 623                              struct perf_sample *sample,
 624                              struct machine *machine)
 625 {
 626         return machine__process_comm_event(machine, event, sample);
 627 }
 628
 629 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 630                              union perf_event *event,
 631                              struct perf_sample *sample,
 632                              struct machine *machine)
 633 {
 634         return machine__process_lost_event(machine, event, sample);
 635 }
 636
 637 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 638 {
 639         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
 640                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 641                        event->mmap.len, event->mmap.pgoff,
 642                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 643                        event->mmap.filename);
 644 }
 645
 646 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 647 {
 648         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 649                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
 650                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 651                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 652                        event->mmap2.min, event->mmap2.ino,
 653                        event->mmap2.ino_generation,
 654                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
 655                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
 656                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
 657                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
 658                        event->mmap2.filename);
 659 }
 660
 661 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 662                              union perf_event *event,
 663                              struct perf_sample *sample,
 664                              struct machine *machine)
 665 {
 666         return machine__process_mmap_event(machine, event, sample);
 667 }
 668
 669 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 670                              union perf_event *event,
 671                              struct perf_sample *sample,
 672                              struct machine *machine)
 673 {
 674         return machine__process_mmap2_event(machine, event, sample);
 675 }
 676
 677 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 678 {
 679         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 680                        event->fork.pid, event->fork.tid,
 681                        event->fork.ppid, event->fork.ptid);
 682 }
 683
 684 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 685                              union perf_event *event,
 686                              struct perf_sample *sample,
 687                              struct machine *machine)
 688 {
 689         return machine__process_fork_event(machine, event, sample);
 690 }
 691
 692 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 693                              union perf_event *event,
 694                              struct perf_sample *sample,
 695                              struct machine *machine)
 696 {
 697         return machine__process_exit_event(machine, event, sample);
 698 }
 699
 700 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 701 {
 702         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 703                              perf_event__name(event->header.type));
 704
 705         switch (event->header.type) {
 706         case PERF_RECORD_COMM:
 707                 ret += perf_event__fprintf_comm(event, fp);
 708                 break;
 709         case PERF_RECORD_FORK:
 710         case PERF_RECORD_EXIT:
 711                 ret += perf_event__fprintf_task(event, fp);
 712                 break;
 713         case PERF_RECORD_MMAP:
 714                 ret += perf_event__fprintf_mmap(event, fp);
 715                 break;
 716         case PERF_RECORD_MMAP2:
 717                 ret += perf_event__fprintf_mmap2(event, fp);
 718                 break;
 719         default:
 720                 ret += fprintf(fp, "\n");
 721         }
 722
 723         return ret;
 724 }
 725
 726 int perf_event__process(struct perf_tool *tool __maybe_unused,
 727                         union perf_event *event,
 728                         struct perf_sample *sample,
 729                         struct machine *machine)
 730 {
 731         return machine__process_event(machine, event, sample);
 732 }
 733
 734 void thread__find_addr_map(struct thread *thread, u8 cpumode,
 735                            enum map_type type, u64 addr,
 736                            struct addr_location *al)
 737 {
 738         struct map_groups *mg = thread->mg;
 739         struct machine *machine = mg->machine;
 740         bool load_map = false;
 741
 742         al->machine = machine;
 743         al->thread = thread;
 744         al->addr = addr;
 745         al->cpumode = cpumode;
 746         al->filtered = 0;
 747
 748         if (machine == NULL) {
 749                 al->map = NULL;
 750                 return;
 751         }
 752
 753         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 754                 al->level = 'k';
 755                 mg = &machine->kmaps;
 756                 load_map = true;
 757         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 758                 al->level = '.';
 759         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 760                 al->level = 'g';
 761                 mg = &machine->kmaps;
 762                 load_map = true;
 763         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 764                 al->level = 'u';
 765         } else {
 766                 al->level = 'H';
 767                 al->map = NULL;
 768
 769                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 770                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 771                         !perf_guest)
 772                         al->filtered |= (1 << HIST_FILTER__GUEST);
 773                 if ((cpumode == PERF_RECORD_MISC_USER ||
 774                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 775                         !perf_host)
 776                         al->filtered |= (1 << HIST_FILTER__HOST);
 777
 778                 return;
 779         }
 780 try_again:
 781         al->map = map_groups__find(mg, type, al->addr);
 782         if (al->map == NULL) {
 783                 /*
 784                  * If this is outside of all known maps, and is a negative
 785                  * address, try to look it up in the kernel dso, as it might be
 786                  * a vsyscall or vdso (which executes in user-mode).
 787                  *
 788                  * XXX This is nasty, we should have a symbol list in the
 789                  * "[vdso]" dso, but for now lets use the old trick of looking
 790                  * in the whole kernel symbol list.
 791                  */
 792                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
 793                     mg != &machine->kmaps &&
 794                     machine__kernel_ip(machine, al->addr)) {
 795                         mg = &machine->kmaps;
 796                         load_map = true;
 797                         goto try_again;
 798                 }
 799         } else {
 800                 /*
 801                  * Kernel maps might be changed when loading symbols so loading
 802                  * must be done prior to using kernel maps.
 803                  */
 804                 if (load_map)
 805                         map__load(al->map, machine->symbol_filter);
 806                 al->addr = al->map->map_ip(al->map, al->addr);
 807         }
 808 }
 809
 810 void thread__find_addr_location(struct thread *thread,
 811                                 u8 cpumode, enum map_type type, u64 addr,
 812                                 struct addr_location *al)
 813 {
 814         thread__find_addr_map(thread, cpumode, type, addr, al);
 815         if (al->map != NULL)
 816                 al->sym = map__find_symbol(al->map, al->addr,
 817                                            thread->mg->machine->symbol_filter);
 818         else
 819                 al->sym = NULL;
 820 }
 821
 822 int perf_event__preprocess_sample(const union perf_event *event,
 823                                   struct machine *machine,
 824                                   struct addr_location *al,
 825                                   struct perf_sample *sample)
 826 {
 827         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 828         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 829                                                         sample->tid);
 830
 831         if (thread == NULL)
 832                 return -1;
 833
 834         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 835         /*
 836          * Have we already created the kernel maps for this machine?
 837          *
 838          * This should have happened earlier, when we processed the kernel MMAP
 839          * events, but for older perf.data files there was no such thing, so do
 840          * it now.
 841          */
 842         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 843             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 844                 machine__create_kernel_maps(machine);
 845
 846         thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
 847         dump_printf(" ...... dso: %s\n",
 848                     al->map ? al->map->dso->long_name :
 849                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 850
 851         if (thread__is_filtered(thread))
 852                 al->filtered |= (1 << HIST_FILTER__THREAD);
 853
 854         al->sym = NULL;
 855         al->cpu = sample->cpu;
 856
 857         if (al->map) {
 858                 struct dso *dso = al->map->dso;
 859
 860                 if (symbol_conf.dso_list &&
 861                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 862                                                   dso->short_name) ||
 863                                (dso->short_name != dso->long_name &&
 864                                 strlist__has_entry(symbol_conf.dso_list,
 865                                                    dso->long_name))))) {
 866                         al->filtered |= (1 << HIST_FILTER__DSO);
 867                 }
 868
 869                 al->sym = map__find_symbol(al->map, al->addr,
 870                                            machine->symbol_filter);
 871         }
 872
 873         if (symbol_conf.sym_list &&
 874                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 875                                                 al->sym->name))) {
 876                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
 877         }
 878
 879         return 0;
 880 }
 881
 882 bool is_bts_event(struct perf_event_attr *attr)
 883 {
 884         return attr->type == PERF_TYPE_HARDWARE &&
 885                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
 886                attr->sample_period == 1;
 887 }
 888
 889 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 890 {
 891         if (attr->type == PERF_TYPE_SOFTWARE &&
 892             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
 893              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
 894              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
 895                 return true;
 896
 897         if (is_bts_event(attr))
 898                 return true;
 899
 900         return false;
 901 }
 902
 903 void perf_event__preprocess_sample_addr(union perf_event *event,
 904                                         struct perf_sample *sample,
 905                                         struct thread *thread,
 906                                         struct addr_location *al)
 907 {
 908         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 909
 910         thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
 911         if (!al->map)
 912                 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
 913                                       sample->addr, al);
 914
 915         al->cpu = sample->cpu;
 916         al->sym = NULL;
 917
 918         if (al->map)
 919                 al->sym = map__find_symbol(al->map, al->addr, NULL);
 920 }