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