tools/perf/util/event.c

   1 #include <dirent.h>
   2 #include <errno.h>
   3 #include <inttypes.h>
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <unistd.h>
   9 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  10 #include <api/fs/fs.h>
  11 #include <linux/perf_event.h>
  12 #include "event.h"
  13 #include "debug.h"
  14 #include "hist.h"
  15 #include "machine.h"
  16 #include "sort.h"
  17 #include "string2.h"
  18 #include "strlist.h"
  19 #include "thread.h"
  20 #include "thread_map.h"
  21 #include "sane_ctype.h"
  22 #include "symbol/kallsyms.h"
  23 #include "asm/bug.h"
  24 #include "stat.h"
  25
  26 static const char *perf_event__names[] = {
  27         [0]                                     = "TOTAL",
  28         [PERF_RECORD_MMAP]                      = "MMAP",
  29         [PERF_RECORD_MMAP2]                     = "MMAP2",
  30         [PERF_RECORD_LOST]                      = "LOST",
  31         [PERF_RECORD_COMM]                      = "COMM",
  32         [PERF_RECORD_EXIT]                      = "EXIT",
  33         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  34         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  35         [PERF_RECORD_FORK]                      = "FORK",
  36         [PERF_RECORD_READ]                      = "READ",
  37         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  38         [PERF_RECORD_AUX]                       = "AUX",
  39         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  40         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  41         [PERF_RECORD_SWITCH]                    = "SWITCH",
  42         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  43         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  44         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  45         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  46         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  47         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  48         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  49         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  50         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  51         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  52         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  53         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  54         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  55         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  56         [PERF_RECORD_STAT]                      = "STAT",
  57         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  58         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  59         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  60 };
  61
  62 static const char *perf_ns__names[] = {
  63         [NET_NS_INDEX]          = "net",
  64         [UTS_NS_INDEX]          = "uts",
  65         [IPC_NS_INDEX]          = "ipc",
  66         [PID_NS_INDEX]          = "pid",
  67         [USER_NS_INDEX]         = "user",
  68         [MNT_NS_INDEX]          = "mnt",
  69         [CGROUP_NS_INDEX]       = "cgroup",
  70 };
  71
  72 const char *perf_event__name(unsigned int id)
  73 {
  74         if (id >= ARRAY_SIZE(perf_event__names))
  75                 return "INVALID";
  76         if (!perf_event__names[id])
  77                 return "UNKNOWN";
  78         return perf_event__names[id];
  79 }
  80
  81 static const char *perf_ns__name(unsigned int id)
  82 {
  83         if (id >= ARRAY_SIZE(perf_ns__names))
  84                 return "UNKNOWN";
  85         return perf_ns__names[id];
  86 }
  87
  88 static int perf_tool__process_synth_event(struct perf_tool *tool,
  89                                           union perf_event *event,
  90                                           struct machine *machine,
  91                                           perf_event__handler_t process)
  92 {
  93         struct perf_sample synth_sample = {
  94         .pid       = -1,
  95         .tid       = -1,
  96         .time      = -1,
  97         .stream_id = -1,
  98         .cpu       = -1,
  99         .period    = 1,
 100         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 101         };
 102
 103         return process(tool, event, &synth_sample, machine);
 104 };
 105
 106 /*
 107  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 108  * the comm, tgid and ppid.
 109  */
 110 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 111                                     pid_t *tgid, pid_t *ppid)
 112 {
 113         char filename[PATH_MAX];
 114         char bf[4096];
 115         int fd;
 116         size_t size = 0;
 117         ssize_t n;
 118         char *name, *tgids, *ppids;
 119
 120         *tgid = -1;
 121         *ppid = -1;
 122
 123         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 124
 125         fd = open(filename, O_RDONLY);
 126         if (fd < 0) {
 127                 pr_debug("couldn't open %s\n", filename);
 128                 return -1;
 129         }
 130
 131         n = read(fd, bf, sizeof(bf) - 1);
 132         close(fd);
 133         if (n <= 0) {
 134                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 135                            pid);
 136                 return -1;
 137         }
 138         bf[n] = '\0';
 139
 140         name = strstr(bf, "Name:");
 141         tgids = strstr(bf, "Tgid:");
 142         ppids = strstr(bf, "PPid:");
 143
 144         if (name) {
 145                 char *nl;
 146
 147                 name += 5;  /* strlen("Name:") */
 148                 name = ltrim(name);
 149
 150                 nl = strchr(name, '\n');
 151                 if (nl)
 152                         *nl = '\0';
 153
 154                 size = strlen(name);
 155                 if (size >= len)
 156                         size = len - 1;
 157                 memcpy(comm, name, size);
 158                 comm[size] = '\0';
 159         } else {
 160                 pr_debug("Name: string not found for pid %d\n", pid);
 161         }
 162
 163         if (tgids) {
 164                 tgids += 5;  /* strlen("Tgid:") */
 165                 *tgid = atoi(tgids);
 166         } else {
 167                 pr_debug("Tgid: string not found for pid %d\n", pid);
 168         }
 169
 170         if (ppids) {
 171                 ppids += 5;  /* strlen("PPid:") */
 172                 *ppid = atoi(ppids);
 173         } else {
 174                 pr_debug("PPid: string not found for pid %d\n", pid);
 175         }
 176
 177         return 0;
 178 }
 179
 180 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 181                                     struct machine *machine,
 182                                     pid_t *tgid, pid_t *ppid)
 183 {
 184         size_t size;
 185
 186         *ppid = -1;
 187
 188         memset(&event->comm, 0, sizeof(event->comm));
 189
 190         if (machine__is_host(machine)) {
 191                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 192                                              sizeof(event->comm.comm),
 193                                              tgid, ppid) != 0) {
 194                         return -1;
 195                 }
 196         } else {
 197                 *tgid = machine->pid;
 198         }
 199
 200         if (*tgid < 0)
 201                 return -1;
 202
 203         event->comm.pid = *tgid;
 204         event->comm.header.type = PERF_RECORD_COMM;
 205
 206         size = strlen(event->comm.comm) + 1;
 207         size = PERF_ALIGN(size, sizeof(u64));
 208         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 209         event->comm.header.size = (sizeof(event->comm) -
 210                                 (sizeof(event->comm.comm) - size) +
 211                                 machine->id_hdr_size);
 212         event->comm.tid = pid;
 213
 214         return 0;
 215 }
 216
 217 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 218                                          union perf_event *event, pid_t pid,
 219                                          perf_event__handler_t process,
 220                                          struct machine *machine)
 221 {
 222         pid_t tgid, ppid;
 223
 224         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 225                 return -1;
 226
 227         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 228                 return -1;
 229
 230         return tgid;
 231 }
 232
 233 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 234                                          struct perf_ns_link_info *ns_link_info)
 235 {
 236         struct stat64 st;
 237         char proc_ns[128];
 238
 239         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 240         if (stat64(proc_ns, &st) == 0) {
 241                 ns_link_info->dev = st.st_dev;
 242                 ns_link_info->ino = st.st_ino;
 243         }
 244 }
 245
 246 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 247                                       union perf_event *event,
 248                                       pid_t pid, pid_t tgid,
 249                                       perf_event__handler_t process,
 250                                       struct machine *machine)
 251 {
 252         u32 idx;
 253         struct perf_ns_link_info *ns_link_info;
 254
 255         if (!tool || !tool->namespace_events)
 256                 return 0;
 257
 258         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 259                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 260                machine->id_hdr_size));
 261
 262         event->namespaces.pid = tgid;
 263         event->namespaces.tid = pid;
 264
 265         event->namespaces.nr_namespaces = NR_NAMESPACES;
 266
 267         ns_link_info = event->namespaces.link_info;
 268
 269         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 270                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 271                                              &ns_link_info[idx]);
 272
 273         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 274
 275         event->namespaces.header.size = (sizeof(event->namespaces) +
 276                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 277                         machine->id_hdr_size);
 278
 279         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 280                 return -1;
 281
 282         return 0;
 283 }
 284
 285 static int perf_event__synthesize_fork(struct perf_tool *tool,
 286                                        union perf_event *event,
 287                                        pid_t pid, pid_t tgid, pid_t ppid,
 288                                        perf_event__handler_t process,
 289                                        struct machine *machine)
 290 {
 291         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 292
 293         /*
 294          * for main thread set parent to ppid from status file. For other
 295          * threads set parent pid to main thread. ie., assume main thread
 296          * spawns all threads in a process
 297         */
 298         if (tgid == pid) {
 299                 event->fork.ppid = ppid;
 300                 event->fork.ptid = ppid;
 301         } else {
 302                 event->fork.ppid = tgid;
 303                 event->fork.ptid = tgid;
 304         }
 305         event->fork.pid  = tgid;
 306         event->fork.tid  = pid;
 307         event->fork.header.type = PERF_RECORD_FORK;
 308
 309         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 310
 311         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 312                 return -1;
 313
 314         return 0;
 315 }
 316
 317 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 318                                        union perf_event *event,
 319                                        pid_t pid, pid_t tgid,
 320                                        perf_event__handler_t process,
 321                                        struct machine *machine,
 322                                        bool mmap_data,
 323                                        unsigned int proc_map_timeout)
 324 {
 325         char filename[PATH_MAX];
 326         FILE *fp;
 327         unsigned long long t;
 328         bool truncation = false;
 329         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 330         int rc = 0;
 331         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 332         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 333
 334         if (machine__is_default_guest(machine))
 335                 return 0;
 336
 337         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 338                  machine->root_dir, pid, pid);
 339
 340         fp = fopen(filename, "r");
 341         if (fp == NULL) {
 342                 /*
 343                  * We raced with a task exiting - just return:
 344                  */
 345                 pr_debug("couldn't open %s\n", filename);
 346                 return -1;
 347         }
 348
 349         event->header.type = PERF_RECORD_MMAP2;
 350         t = rdclock();
 351
 352         while (1) {
 353                 char bf[BUFSIZ];
 354                 char prot[5];
 355                 char execname[PATH_MAX];
 356                 char anonstr[] = "//anon";
 357                 unsigned int ino;
 358                 size_t size;
 359                 ssize_t n;
 360
 361                 if (fgets(bf, sizeof(bf), fp) == NULL)
 362                         break;
 363
 364                 if ((rdclock() - t) > timeout) {
 365                         pr_warning("Reading %s time out. "
 366                                    "You may want to increase "
 367                                    "the time limit by --proc-map-timeout\n",
 368                                    filename);
 369                         truncation = true;
 370                         goto out;
 371                 }
 372
 373                 /* ensure null termination since stack will be reused. */
 374                 strcpy(execname, "");
 375
 376                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 377                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 378                        &event->mmap2.start, &event->mmap2.len, prot,
 379                        &event->mmap2.pgoff, &event->mmap2.maj,
 380                        &event->mmap2.min,
 381                        &ino, execname);
 382
 383                 /*
 384                  * Anon maps don't have the execname.
 385                  */
 386                 if (n < 7)
 387                         continue;
 388
 389                 event->mmap2.ino = (u64)ino;
 390
 391                 /*
 392                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 393                  */
 394                 if (machine__is_host(machine))
 395                         event->header.misc = PERF_RECORD_MISC_USER;
 396                 else
 397                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 398
 399                 /* map protection and flags bits */
 400                 event->mmap2.prot = 0;
 401                 event->mmap2.flags = 0;
 402                 if (prot[0] == 'r')
 403                         event->mmap2.prot |= PROT_READ;
 404                 if (prot[1] == 'w')
 405                         event->mmap2.prot |= PROT_WRITE;
 406                 if (prot[2] == 'x')
 407                         event->mmap2.prot |= PROT_EXEC;
 408
 409                 if (prot[3] == 's')
 410                         event->mmap2.flags |= MAP_SHARED;
 411                 else
 412                         event->mmap2.flags |= MAP_PRIVATE;
 413
 414                 if (prot[2] != 'x') {
 415                         if (!mmap_data || prot[0] != 'r')
 416                                 continue;
 417
 418                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 419                 }
 420
 421 out:
 422                 if (truncation)
 423                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 424
 425                 if (!strcmp(execname, ""))
 426                         strcpy(execname, anonstr);
 427
 428                 if (hugetlbfs_mnt_len &&
 429                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 430                         strcpy(execname, anonstr);
 431                         event->mmap2.flags |= MAP_HUGETLB;
 432                 }
 433
 434                 size = strlen(execname) + 1;
 435                 memcpy(event->mmap2.filename, execname, size);
 436                 size = PERF_ALIGN(size, sizeof(u64));
 437                 event->mmap2.len -= event->mmap.start;
 438                 event->mmap2.header.size = (sizeof(event->mmap2) -
 439                                         (sizeof(event->mmap2.filename) - size));
 440                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 441                 event->mmap2.header.size += machine->id_hdr_size;
 442                 event->mmap2.pid = tgid;
 443                 event->mmap2.tid = pid;
 444
 445                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 446                         rc = -1;
 447                         break;
 448                 }
 449
 450                 if (truncation)
 451                         break;
 452         }
 453
 454         fclose(fp);
 455         return rc;
 456 }
 457
 458 int perf_event__synthesize_modules(struct perf_tool *tool,
 459                                    perf_event__handler_t process,
 460                                    struct machine *machine)
 461 {
 462         int rc = 0;
 463         struct map *pos;
 464         struct map_groups *kmaps = &machine->kmaps;
 465         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 466         union perf_event *event = zalloc((sizeof(event->mmap) +
 467                                           machine->id_hdr_size));
 468         if (event == NULL) {
 469                 pr_debug("Not enough memory synthesizing mmap event "
 470                          "for kernel modules\n");
 471                 return -1;
 472         }
 473
 474         event->header.type = PERF_RECORD_MMAP;
 475
 476         /*
 477          * kernel uses 0 for user space maps, see kernel/perf_event.c
 478          * __perf_event_mmap
 479          */
 480         if (machine__is_host(machine))
 481                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 482         else
 483                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 484
 485         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 486                 size_t size;
 487
 488                 if (__map__is_kernel(pos))
 489                         continue;
 490
 491                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 492                 event->mmap.header.type = PERF_RECORD_MMAP;
 493                 event->mmap.header.size = (sizeof(event->mmap) -
 494                                         (sizeof(event->mmap.filename) - size));
 495                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 496                 event->mmap.header.size += machine->id_hdr_size;
 497                 event->mmap.start = pos->start;
 498                 event->mmap.len   = pos->end - pos->start;
 499                 event->mmap.pid   = machine->pid;
 500
 501                 memcpy(event->mmap.filename, pos->dso->long_name,
 502                        pos->dso->long_name_len + 1);
 503                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 504                         rc = -1;
 505                         break;
 506                 }
 507         }
 508
 509         free(event);
 510         return rc;
 511 }
 512
 513 static int __event__synthesize_thread(union perf_event *comm_event,
 514                                       union perf_event *mmap_event,
 515                                       union perf_event *fork_event,
 516                                       union perf_event *namespaces_event,
 517                                       pid_t pid, int full,
 518                                       perf_event__handler_t process,
 519                                       struct perf_tool *tool,
 520                                       struct machine *machine,
 521                                       bool mmap_data,
 522                                       unsigned int proc_map_timeout)
 523 {
 524         char filename[PATH_MAX];
 525         DIR *tasks;
 526         struct dirent *dirent;
 527         pid_t tgid, ppid;
 528         int rc = 0;
 529
 530         /* special case: only send one comm event using passed in pid */
 531         if (!full) {
 532                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 533                                                    process, machine);
 534
 535                 if (tgid == -1)
 536                         return -1;
 537
 538                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 539                                                       tgid, process, machine) < 0)
 540                         return -1;
 541
 542
 543                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 544                                                           process, machine, mmap_data,
 545                                                           proc_map_timeout);
 546         }
 547
 548         if (machine__is_default_guest(machine))
 549                 return 0;
 550
 551         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 552                  machine->root_dir, pid);
 553
 554         tasks = opendir(filename);
 555         if (tasks == NULL) {
 556                 pr_debug("couldn't open %s\n", filename);
 557                 return 0;
 558         }
 559
 560         while ((dirent = readdir(tasks)) != NULL) {
 561                 char *end;
 562                 pid_t _pid;
 563
 564                 _pid = strtol(dirent->d_name, &end, 10);
 565                 if (*end)
 566                         continue;
 567
 568                 rc = -1;
 569                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 570                                              &tgid, &ppid) != 0)
 571                         break;
 572
 573                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 574                                                 ppid, process, machine) < 0)
 575                         break;
 576
 577                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 578                                                       tgid, process, machine) < 0)
 579                         break;
 580
 581                 /*
 582                  * Send the prepared comm event
 583                  */
 584                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 585                         break;
 586
 587                 rc = 0;
 588                 if (_pid == pid) {
 589                         /* process the parent's maps too */
 590                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 591                                                 process, machine, mmap_data, proc_map_timeout);
 592                         if (rc)
 593                                 break;
 594                 }
 595         }
 596
 597         closedir(tasks);
 598         return rc;
 599 }
 600
 601 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 602                                       struct thread_map *threads,
 603                                       perf_event__handler_t process,
 604                                       struct machine *machine,
 605                                       bool mmap_data,
 606                                       unsigned int proc_map_timeout)
 607 {
 608         union perf_event *comm_event, *mmap_event, *fork_event;
 609         union perf_event *namespaces_event;
 610         int err = -1, thread, j;
 611
 612         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 613         if (comm_event == NULL)
 614                 goto out;
 615
 616         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 617         if (mmap_event == NULL)
 618                 goto out_free_comm;
 619
 620         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 621         if (fork_event == NULL)
 622                 goto out_free_mmap;
 623
 624         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 625                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 626                                   machine->id_hdr_size);
 627         if (namespaces_event == NULL)
 628                 goto out_free_fork;
 629
 630         err = 0;
 631         for (thread = 0; thread < threads->nr; ++thread) {
 632                 if (__event__synthesize_thread(comm_event, mmap_event,
 633                                                fork_event, namespaces_event,
 634                                                thread_map__pid(threads, thread), 0,
 635                                                process, tool, machine,
 636                                                mmap_data, proc_map_timeout)) {
 637                         err = -1;
 638                         break;
 639                 }
 640
 641                 /*
 642                  * comm.pid is set to thread group id by
 643                  * perf_event__synthesize_comm
 644                  */
 645                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 646                         bool need_leader = true;
 647
 648                         /* is thread group leader in thread_map? */
 649                         for (j = 0; j < threads->nr; ++j) {
 650                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 651                                         need_leader = false;
 652                                         break;
 653                                 }
 654                         }
 655
 656                         /* if not, generate events for it */
 657                         if (need_leader &&
 658                             __event__synthesize_thread(comm_event, mmap_event,
 659                                                        fork_event, namespaces_event,
 660                                                        comm_event->comm.pid, 0,
 661                                                        process, tool, machine,
 662                                                        mmap_data, proc_map_timeout)) {
 663                                 err = -1;
 664                                 break;
 665                         }
 666                 }
 667         }
 668         free(namespaces_event);
 669 out_free_fork:
 670         free(fork_event);
 671 out_free_mmap:
 672         free(mmap_event);
 673 out_free_comm:
 674         free(comm_event);
 675 out:
 676         return err;
 677 }
 678
 679 int perf_event__synthesize_threads(struct perf_tool *tool,
 680                                    perf_event__handler_t process,
 681                                    struct machine *machine,
 682                                    bool mmap_data,
 683                                    unsigned int proc_map_timeout)
 684 {
 685         DIR *proc;
 686         char proc_path[PATH_MAX];
 687         struct dirent *dirent;
 688         union perf_event *comm_event, *mmap_event, *fork_event;
 689         union perf_event *namespaces_event;
 690         int err = -1;
 691
 692         if (machine__is_default_guest(machine))
 693                 return 0;
 694
 695         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 696         if (comm_event == NULL)
 697                 goto out;
 698
 699         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 700         if (mmap_event == NULL)
 701                 goto out_free_comm;
 702
 703         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 704         if (fork_event == NULL)
 705                 goto out_free_mmap;
 706
 707         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 708                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 709                                   machine->id_hdr_size);
 710         if (namespaces_event == NULL)
 711                 goto out_free_fork;
 712
 713         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 714         proc = opendir(proc_path);
 715
 716         if (proc == NULL)
 717                 goto out_free_namespaces;
 718
 719         while ((dirent = readdir(proc)) != NULL) {
 720                 char *end;
 721                 pid_t pid = strtol(dirent->d_name, &end, 10);
 722
 723                 if (*end) /* only interested in proper numerical dirents */
 724                         continue;
 725                 /*
 726                  * We may race with exiting thread, so don't stop just because
 727                  * one thread couldn't be synthesized.
 728                  */
 729                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 730                                            namespaces_event, pid, 1, process,
 731                                            tool, machine, mmap_data,
 732                                            proc_map_timeout);
 733         }
 734
 735         err = 0;
 736         closedir(proc);
 737 out_free_namespaces:
 738         free(namespaces_event);
 739 out_free_fork:
 740         free(fork_event);
 741 out_free_mmap:
 742         free(mmap_event);
 743 out_free_comm:
 744         free(comm_event);
 745 out:
 746         return err;
 747 }
 748
 749 struct process_symbol_args {
 750         const char *name;
 751         u64        start;
 752 };
 753
 754 static int find_symbol_cb(void *arg, const char *name, char type,
 755                           u64 start)
 756 {
 757         struct process_symbol_args *args = arg;
 758
 759         /*
 760          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 761          * an 'A' to the same address as "_stext".
 762          */
 763         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 764               type == 'A') || strcmp(name, args->name))
 765                 return 0;
 766
 767         args->start = start;
 768         return 1;
 769 }
 770
 771 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 772                                  const char *symbol_name)
 773 {
 774         struct process_symbol_args args = { .name = symbol_name, };
 775
 776         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 777                 return 0;
 778
 779         return args.start;
 780 }
 781
 782 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 783                                        perf_event__handler_t process,
 784                                        struct machine *machine)
 785 {
 786         size_t size;
 787         const char *mmap_name;
 788         char name_buff[PATH_MAX];
 789         struct map *map = machine__kernel_map(machine);
 790         struct kmap *kmap;
 791         int err;
 792         union perf_event *event;
 793
 794         if (symbol_conf.kptr_restrict)
 795                 return -1;
 796         if (map == NULL)
 797                 return -1;
 798
 799         /*
 800          * We should get this from /sys/kernel/sections/.text, but till that is
 801          * available use this, and after it is use this as a fallback for older
 802          * kernels.
 803          */
 804         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 805         if (event == NULL) {
 806                 pr_debug("Not enough memory synthesizing mmap event "
 807                          "for kernel modules\n");
 808                 return -1;
 809         }
 810
 811         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 812         if (machine__is_host(machine)) {
 813                 /*
 814                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 815                  * see kernel/perf_event.c __perf_event_mmap
 816                  */
 817                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 818         } else {
 819                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 820         }
 821
 822         kmap = map__kmap(map);
 823         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 824                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 825         size = PERF_ALIGN(size, sizeof(u64));
 826         event->mmap.header.type = PERF_RECORD_MMAP;
 827         event->mmap.header.size = (sizeof(event->mmap) -
 828                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 829         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 830         event->mmap.start = map->start;
 831         event->mmap.len   = map->end - event->mmap.start;
 832         event->mmap.pid   = machine->pid;
 833
 834         err = perf_tool__process_synth_event(tool, event, machine, process);
 835         free(event);
 836
 837         return err;
 838 }
 839
 840 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 841                                       struct thread_map *threads,
 842                                       perf_event__handler_t process,
 843                                       struct machine *machine)
 844 {
 845         union perf_event *event;
 846         int i, err, size;
 847
 848         size  = sizeof(event->thread_map);
 849         size += threads->nr * sizeof(event->thread_map.entries[0]);
 850
 851         event = zalloc(size);
 852         if (!event)
 853                 return -ENOMEM;
 854
 855         event->header.type = PERF_RECORD_THREAD_MAP;
 856         event->header.size = size;
 857         event->thread_map.nr = threads->nr;
 858
 859         for (i = 0; i < threads->nr; i++) {
 860                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 861                 char *comm = thread_map__comm(threads, i);
 862
 863                 if (!comm)
 864                         comm = (char *) "";
 865
 866                 entry->pid = thread_map__pid(threads, i);
 867                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 868         }
 869
 870         err = process(tool, event, NULL, machine);
 871
 872         free(event);
 873         return err;
 874 }
 875
 876 static void synthesize_cpus(struct cpu_map_entries *cpus,
 877                             struct cpu_map *map)
 878 {
 879         int i;
 880
 881         cpus->nr = map->nr;
 882
 883         for (i = 0; i < map->nr; i++)
 884                 cpus->cpu[i] = map->map[i];
 885 }
 886
 887 static void synthesize_mask(struct cpu_map_mask *mask,
 888                             struct cpu_map *map, int max)
 889 {
 890         int i;
 891
 892         mask->nr = BITS_TO_LONGS(max);
 893         mask->long_size = sizeof(long);
 894
 895         for (i = 0; i < map->nr; i++)
 896                 set_bit(map->map[i], mask->mask);
 897 }
 898
 899 static size_t cpus_size(struct cpu_map *map)
 900 {
 901         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
 902 }
 903
 904 static size_t mask_size(struct cpu_map *map, int *max)
 905 {
 906         int i;
 907
 908         *max = 0;
 909
 910         for (i = 0; i < map->nr; i++) {
 911                 /* bit possition of the cpu is + 1 */
 912                 int bit = map->map[i] + 1;
 913
 914                 if (bit > *max)
 915                         *max = bit;
 916         }
 917
 918         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
 919 }
 920
 921 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
 922 {
 923         size_t size_cpus, size_mask;
 924         bool is_dummy = cpu_map__empty(map);
 925
 926         /*
 927          * Both array and mask data have variable size based
 928          * on the number of cpus and their actual values.
 929          * The size of the 'struct cpu_map_data' is:
 930          *
 931          *   array = size of 'struct cpu_map_entries' +
 932          *           number of cpus * sizeof(u64)
 933          *
 934          *   mask  = size of 'struct cpu_map_mask' +
 935          *           maximum cpu bit converted to size of longs
 936          *
 937          * and finaly + the size of 'struct cpu_map_data'.
 938          */
 939         size_cpus = cpus_size(map);
 940         size_mask = mask_size(map, max);
 941
 942         if (is_dummy || (size_cpus < size_mask)) {
 943                 *size += size_cpus;
 944                 *type  = PERF_CPU_MAP__CPUS;
 945         } else {
 946                 *size += size_mask;
 947                 *type  = PERF_CPU_MAP__MASK;
 948         }
 949
 950         *size += sizeof(struct cpu_map_data);
 951         return zalloc(*size);
 952 }
 953
 954 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
 955                               u16 type, int max)
 956 {
 957         data->type = type;
 958
 959         switch (type) {
 960         case PERF_CPU_MAP__CPUS:
 961                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
 962                 break;
 963         case PERF_CPU_MAP__MASK:
 964                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
 965         default:
 966                 break;
 967         };
 968 }
 969
 970 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
 971 {
 972         size_t size = sizeof(struct cpu_map_event);
 973         struct cpu_map_event *event;
 974         int max;
 975         u16 type;
 976
 977         event = cpu_map_data__alloc(map, &size, &type, &max);
 978         if (!event)
 979                 return NULL;
 980
 981         event->header.type = PERF_RECORD_CPU_MAP;
 982         event->header.size = size;
 983         event->data.type   = type;
 984
 985         cpu_map_data__synthesize(&event->data, map, type, max);
 986         return event;
 987 }
 988
 989 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
 990                                    struct cpu_map *map,
 991                                    perf_event__handler_t process,
 992                                    struct machine *machine)
 993 {
 994         struct cpu_map_event *event;
 995         int err;
 996
 997         event = cpu_map_event__new(map);
 998         if (!event)
 999                 return -ENOMEM;
1000
1001         err = process(tool, (union perf_event *) event, NULL, machine);
1002
1003         free(event);
1004         return err;
1005 }
1006
1007 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1008                                        struct perf_stat_config *config,
1009                                        perf_event__handler_t process,
1010                                        struct machine *machine)
1011 {
1012         struct stat_config_event *event;
1013         int size, i = 0, err;
1014
1015         size  = sizeof(*event);
1016         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1017
1018         event = zalloc(size);
1019         if (!event)
1020                 return -ENOMEM;
1021
1022         event->header.type = PERF_RECORD_STAT_CONFIG;
1023         event->header.size = size;
1024         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1025
1026 #define ADD(__term, __val)                                      \
1027         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1028         event->data[i].val = __val;                             \
1029         i++;
1030
1031         ADD(AGGR_MODE,  config->aggr_mode)
1032         ADD(INTERVAL,   config->interval)
1033         ADD(SCALE,      config->scale)
1034
1035         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1036                   "stat config terms unbalanced\n");
1037 #undef ADD
1038
1039         err = process(tool, (union perf_event *) event, NULL, machine);
1040
1041         free(event);
1042         return err;
1043 }
1044
1045 int perf_event__synthesize_stat(struct perf_tool *tool,
1046                                 u32 cpu, u32 thread, u64 id,
1047                                 struct perf_counts_values *count,
1048                                 perf_event__handler_t process,
1049                                 struct machine *machine)
1050 {
1051         struct stat_event event;
1052
1053         event.header.type = PERF_RECORD_STAT;
1054         event.header.size = sizeof(event);
1055         event.header.misc = 0;
1056
1057         event.id        = id;
1058         event.cpu       = cpu;
1059         event.thread    = thread;
1060         event.val       = count->val;
1061         event.ena       = count->ena;
1062         event.run       = count->run;
1063
1064         return process(tool, (union perf_event *) &event, NULL, machine);
1065 }
1066
1067 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1068                                       u64 evtime, u64 type,
1069                                       perf_event__handler_t process,
1070                                       struct machine *machine)
1071 {
1072         struct stat_round_event event;
1073
1074         event.header.type = PERF_RECORD_STAT_ROUND;
1075         event.header.size = sizeof(event);
1076         event.header.misc = 0;
1077
1078         event.time = evtime;
1079         event.type = type;
1080
1081         return process(tool, (union perf_event *) &event, NULL, machine);
1082 }
1083
1084 void perf_event__read_stat_config(struct perf_stat_config *config,
1085                                   struct stat_config_event *event)
1086 {
1087         unsigned i;
1088
1089         for (i = 0; i < event->nr; i++) {
1090
1091                 switch (event->data[i].tag) {
1092 #define CASE(__term, __val)                                     \
1093                 case PERF_STAT_CONFIG_TERM__##__term:           \
1094                         config->__val = event->data[i].val;     \
1095                         break;
1096
1097                 CASE(AGGR_MODE, aggr_mode)
1098                 CASE(SCALE,     scale)
1099                 CASE(INTERVAL,  interval)
1100 #undef CASE
1101                 default:
1102                         pr_warning("unknown stat config term %" PRIu64 "\n",
1103                                    event->data[i].tag);
1104                 }
1105         }
1106 }
1107
1108 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1109 {
1110         const char *s;
1111
1112         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1113                 s = " exec";
1114         else
1115                 s = "";
1116
1117         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1118 }
1119
1120 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1121 {
1122         size_t ret = 0;
1123         struct perf_ns_link_info *ns_link_info;
1124         u32 nr_namespaces, idx;
1125
1126         ns_link_info = event->namespaces.link_info;
1127         nr_namespaces = event->namespaces.nr_namespaces;
1128
1129         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1130                        event->namespaces.pid,
1131                        event->namespaces.tid,
1132                        nr_namespaces);
1133
1134         for (idx = 0; idx < nr_namespaces; idx++) {
1135                 if (idx && (idx % 4 == 0))
1136                         ret += fprintf(fp, "\n\t\t ");
1137
1138                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1139                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1140                                 (u64)ns_link_info[idx].ino,
1141                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1142         }
1143
1144         return ret;
1145 }
1146
1147 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1148                              union perf_event *event,
1149                              struct perf_sample *sample,
1150                              struct machine *machine)
1151 {
1152         return machine__process_comm_event(machine, event, sample);
1153 }
1154
1155 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1156                                    union perf_event *event,
1157                                    struct perf_sample *sample,
1158                                    struct machine *machine)
1159 {
1160         return machine__process_namespaces_event(machine, event, sample);
1161 }
1162
1163 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1164                              union perf_event *event,
1165                              struct perf_sample *sample,
1166                              struct machine *machine)
1167 {
1168         return machine__process_lost_event(machine, event, sample);
1169 }
1170
1171 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1172                             union perf_event *event,
1173                             struct perf_sample *sample __maybe_unused,
1174                             struct machine *machine)
1175 {
1176         return machine__process_aux_event(machine, event);
1177 }
1178
1179 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1180                                      union perf_event *event,
1181                                      struct perf_sample *sample __maybe_unused,
1182                                      struct machine *machine)
1183 {
1184         return machine__process_itrace_start_event(machine, event);
1185 }
1186
1187 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1188                                      union perf_event *event,
1189                                      struct perf_sample *sample,
1190                                      struct machine *machine)
1191 {
1192         return machine__process_lost_samples_event(machine, event, sample);
1193 }
1194
1195 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1196                                union perf_event *event,
1197                                struct perf_sample *sample __maybe_unused,
1198                                struct machine *machine)
1199 {
1200         return machine__process_switch_event(machine, event);
1201 }
1202
1203 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1204 {
1205         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1206                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1207                        event->mmap.len, event->mmap.pgoff,
1208                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1209                        event->mmap.filename);
1210 }
1211
1212 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1213 {
1214         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1215                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1216                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1217                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1218                        event->mmap2.min, event->mmap2.ino,
1219                        event->mmap2.ino_generation,
1220                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1221                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1222                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1223                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1224                        event->mmap2.filename);
1225 }
1226
1227 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1228 {
1229         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1230         size_t ret;
1231
1232         ret = fprintf(fp, " nr: ");
1233
1234         if (threads)
1235                 ret += thread_map__fprintf(threads, fp);
1236         else
1237                 ret += fprintf(fp, "failed to get threads from event\n");
1238
1239         thread_map__put(threads);
1240         return ret;
1241 }
1242
1243 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1244 {
1245         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1246         size_t ret;
1247
1248         ret = fprintf(fp, ": ");
1249
1250         if (cpus)
1251                 ret += cpu_map__fprintf(cpus, fp);
1252         else
1253                 ret += fprintf(fp, "failed to get cpumap from event\n");
1254
1255         cpu_map__put(cpus);
1256         return ret;
1257 }
1258
1259 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1260                              union perf_event *event,
1261                              struct perf_sample *sample,
1262                              struct machine *machine)
1263 {
1264         return machine__process_mmap_event(machine, event, sample);
1265 }
1266
1267 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1268                              union perf_event *event,
1269                              struct perf_sample *sample,
1270                              struct machine *machine)
1271 {
1272         return machine__process_mmap2_event(machine, event, sample);
1273 }
1274
1275 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1276 {
1277         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1278                        event->fork.pid, event->fork.tid,
1279                        event->fork.ppid, event->fork.ptid);
1280 }
1281
1282 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1283                              union perf_event *event,
1284                              struct perf_sample *sample,
1285                              struct machine *machine)
1286 {
1287         return machine__process_fork_event(machine, event, sample);
1288 }
1289
1290 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1291                              union perf_event *event,
1292                              struct perf_sample *sample,
1293                              struct machine *machine)
1294 {
1295         return machine__process_exit_event(machine, event, sample);
1296 }
1297
1298 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1299 {
1300         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1301                        event->aux.aux_offset, event->aux.aux_size,
1302                        event->aux.flags,
1303                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1304                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1305                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1306 }
1307
1308 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1309 {
1310         return fprintf(fp, " pid: %u tid: %u\n",
1311                        event->itrace_start.pid, event->itrace_start.tid);
1312 }
1313
1314 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1315 {
1316         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1317         const char *in_out = out ? "OUT" : "IN ";
1318
1319         if (event->header.type == PERF_RECORD_SWITCH)
1320                 return fprintf(fp, " %s\n", in_out);
1321
1322         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1323                        in_out, out ? "next" : "prev",
1324                        event->context_switch.next_prev_pid,
1325                        event->context_switch.next_prev_tid);
1326 }
1327
1328 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1329 {
1330         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1331                              perf_event__name(event->header.type));
1332
1333         switch (event->header.type) {
1334         case PERF_RECORD_COMM:
1335                 ret += perf_event__fprintf_comm(event, fp);
1336                 break;
1337         case PERF_RECORD_FORK:
1338         case PERF_RECORD_EXIT:
1339                 ret += perf_event__fprintf_task(event, fp);
1340                 break;
1341         case PERF_RECORD_MMAP:
1342                 ret += perf_event__fprintf_mmap(event, fp);
1343                 break;
1344         case PERF_RECORD_NAMESPACES:
1345                 ret += perf_event__fprintf_namespaces(event, fp);
1346                 break;
1347         case PERF_RECORD_MMAP2:
1348                 ret += perf_event__fprintf_mmap2(event, fp);
1349                 break;
1350         case PERF_RECORD_AUX:
1351                 ret += perf_event__fprintf_aux(event, fp);
1352                 break;
1353         case PERF_RECORD_ITRACE_START:
1354                 ret += perf_event__fprintf_itrace_start(event, fp);
1355                 break;
1356         case PERF_RECORD_SWITCH:
1357         case PERF_RECORD_SWITCH_CPU_WIDE:
1358                 ret += perf_event__fprintf_switch(event, fp);
1359                 break;
1360         default:
1361                 ret += fprintf(fp, "\n");
1362         }
1363
1364         return ret;
1365 }
1366
1367 int perf_event__process(struct perf_tool *tool __maybe_unused,
1368                         union perf_event *event,
1369                         struct perf_sample *sample,
1370                         struct machine *machine)
1371 {
1372         return machine__process_event(machine, event, sample);
1373 }
1374
1375 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1376                            enum map_type type, u64 addr,
1377                            struct addr_location *al)
1378 {
1379         struct map_groups *mg = thread->mg;
1380         struct machine *machine = mg->machine;
1381         bool load_map = false;
1382
1383         al->machine = machine;
1384         al->thread = thread;
1385         al->addr = addr;
1386         al->cpumode = cpumode;
1387         al->filtered = 0;
1388
1389         if (machine == NULL) {
1390                 al->map = NULL;
1391                 return;
1392         }
1393
1394         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1395                 al->level = 'k';
1396                 mg = &machine->kmaps;
1397                 load_map = true;
1398         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1399                 al->level = '.';
1400         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1401                 al->level = 'g';
1402                 mg = &machine->kmaps;
1403                 load_map = true;
1404         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1405                 al->level = 'u';
1406         } else {
1407                 al->level = 'H';
1408                 al->map = NULL;
1409
1410                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1411                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1412                         !perf_guest)
1413                         al->filtered |= (1 << HIST_FILTER__GUEST);
1414                 if ((cpumode == PERF_RECORD_MISC_USER ||
1415                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1416                         !perf_host)
1417                         al->filtered |= (1 << HIST_FILTER__HOST);
1418
1419                 return;
1420         }
1421 try_again:
1422         al->map = map_groups__find(mg, type, al->addr);
1423         if (al->map == NULL) {
1424                 /*
1425                  * If this is outside of all known maps, and is a negative
1426                  * address, try to look it up in the kernel dso, as it might be
1427                  * a vsyscall or vdso (which executes in user-mode).
1428                  *
1429                  * XXX This is nasty, we should have a symbol list in the
1430                  * "[vdso]" dso, but for now lets use the old trick of looking
1431                  * in the whole kernel symbol list.
1432                  */
1433                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1434                     mg != &machine->kmaps &&
1435                     machine__kernel_ip(machine, al->addr)) {
1436                         mg = &machine->kmaps;
1437                         load_map = true;
1438                         goto try_again;
1439                 }
1440         } else {
1441                 /*
1442                  * Kernel maps might be changed when loading symbols so loading
1443                  * must be done prior to using kernel maps.
1444                  */
1445                 if (load_map)
1446                         map__load(al->map);
1447                 al->addr = al->map->map_ip(al->map, al->addr);
1448         }
1449 }
1450
1451 void thread__find_addr_location(struct thread *thread,
1452                                 u8 cpumode, enum map_type type, u64 addr,
1453                                 struct addr_location *al)
1454 {
1455         thread__find_addr_map(thread, cpumode, type, addr, al);
1456         if (al->map != NULL)
1457                 al->sym = map__find_symbol(al->map, al->addr);
1458         else
1459                 al->sym = NULL;
1460 }
1461
1462 /*
1463  * Callers need to drop the reference to al->thread, obtained in
1464  * machine__findnew_thread()
1465  */
1466 int machine__resolve(struct machine *machine, struct addr_location *al,
1467                      struct perf_sample *sample)
1468 {
1469         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1470                                                         sample->tid);
1471
1472         if (thread == NULL)
1473                 return -1;
1474
1475         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1476         /*
1477          * Have we already created the kernel maps for this machine?
1478          *
1479          * This should have happened earlier, when we processed the kernel MMAP
1480          * events, but for older perf.data files there was no such thing, so do
1481          * it now.
1482          */
1483         if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1484             machine__kernel_map(machine) == NULL)
1485                 machine__create_kernel_maps(machine);
1486
1487         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1488         dump_printf(" ...... dso: %s\n",
1489                     al->map ? al->map->dso->long_name :
1490                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1491
1492         if (thread__is_filtered(thread))
1493                 al->filtered |= (1 << HIST_FILTER__THREAD);
1494
1495         al->sym = NULL;
1496         al->cpu = sample->cpu;
1497         al->socket = -1;
1498
1499         if (al->cpu >= 0) {
1500                 struct perf_env *env = machine->env;
1501
1502                 if (env && env->cpu)
1503                         al->socket = env->cpu[al->cpu].socket_id;
1504         }
1505
1506         if (al->map) {
1507                 struct dso *dso = al->map->dso;
1508
1509                 if (symbol_conf.dso_list &&
1510                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1511                                                   dso->short_name) ||
1512                                (dso->short_name != dso->long_name &&
1513                                 strlist__has_entry(symbol_conf.dso_list,
1514                                                    dso->long_name))))) {
1515                         al->filtered |= (1 << HIST_FILTER__DSO);
1516                 }
1517
1518                 al->sym = map__find_symbol(al->map, al->addr);
1519         }
1520
1521         if (symbol_conf.sym_list &&
1522                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1523                                                 al->sym->name))) {
1524                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1525         }
1526
1527         return 0;
1528 }
1529
1530 /*
1531  * The preprocess_sample method will return with reference counts for the
1532  * in it, when done using (and perhaps getting ref counts if needing to
1533  * keep a pointer to one of those entries) it must be paired with
1534  * addr_location__put(), so that the refcounts can be decremented.
1535  */
1536 void addr_location__put(struct addr_location *al)
1537 {
1538         thread__zput(al->thread);
1539 }
1540
1541 bool is_bts_event(struct perf_event_attr *attr)
1542 {
1543         return attr->type == PERF_TYPE_HARDWARE &&
1544                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1545                attr->sample_period == 1;
1546 }
1547
1548 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1549 {
1550         if (attr->type == PERF_TYPE_SOFTWARE &&
1551             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1552              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1553              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1554                 return true;
1555
1556         if (is_bts_event(attr))
1557                 return true;
1558
1559         return false;
1560 }
1561
1562 void thread__resolve(struct thread *thread, struct addr_location *al,
1563                      struct perf_sample *sample)
1564 {
1565         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1566         if (!al->map)
1567                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1568                                       sample->addr, al);
1569
1570         al->cpu = sample->cpu;
1571         al->sym = NULL;
1572
1573         if (al->map)
1574                 al->sym = map__find_symbol(al->map, al->addr);
1575 }