tools/perf/util/event.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <dirent.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <inttypes.h>
   6 #include <linux/kernel.h>
   7 #include <linux/types.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <unistd.h>
  11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  12 #include <api/fs/fs.h>
  13 #include <linux/perf_event.h>
  14 #include "event.h"
  15 #include "debug.h"
  16 #include "hist.h"
  17 #include "machine.h"
  18 #include "sort.h"
  19 #include "string2.h"
  20 #include "strlist.h"
  21 #include "thread.h"
  22 #include "thread_map.h"
  23 #include "sane_ctype.h"
  24 #include "symbol/kallsyms.h"
  25 #include "asm/bug.h"
  26 #include "stat.h"
  27
  28 static const char *perf_event__names[] = {
  29         [0]                                     = "TOTAL",
  30         [PERF_RECORD_MMAP]                      = "MMAP",
  31         [PERF_RECORD_MMAP2]                     = "MMAP2",
  32         [PERF_RECORD_LOST]                      = "LOST",
  33         [PERF_RECORD_COMM]                      = "COMM",
  34         [PERF_RECORD_EXIT]                      = "EXIT",
  35         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  36         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  37         [PERF_RECORD_FORK]                      = "FORK",
  38         [PERF_RECORD_READ]                      = "READ",
  39         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  40         [PERF_RECORD_AUX]                       = "AUX",
  41         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  42         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  43         [PERF_RECORD_SWITCH]                    = "SWITCH",
  44         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  45         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  46         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  47         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  48         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  49         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  50         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  51         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  52         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  53         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  54         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  55         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  56         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  57         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  58         [PERF_RECORD_STAT]                      = "STAT",
  59         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  60         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  61         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  62         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  63 };
  64
  65 static const char *perf_ns__names[] = {
  66         [NET_NS_INDEX]          = "net",
  67         [UTS_NS_INDEX]          = "uts",
  68         [IPC_NS_INDEX]          = "ipc",
  69         [PID_NS_INDEX]          = "pid",
  70         [USER_NS_INDEX]         = "user",
  71         [MNT_NS_INDEX]          = "mnt",
  72         [CGROUP_NS_INDEX]       = "cgroup",
  73 };
  74
  75 const char *perf_event__name(unsigned int id)
  76 {
  77         if (id >= ARRAY_SIZE(perf_event__names))
  78                 return "INVALID";
  79         if (!perf_event__names[id])
  80                 return "UNKNOWN";
  81         return perf_event__names[id];
  82 }
  83
  84 static const char *perf_ns__name(unsigned int id)
  85 {
  86         if (id >= ARRAY_SIZE(perf_ns__names))
  87                 return "UNKNOWN";
  88         return perf_ns__names[id];
  89 }
  90
  91 static int perf_tool__process_synth_event(struct perf_tool *tool,
  92                                           union perf_event *event,
  93                                           struct machine *machine,
  94                                           perf_event__handler_t process)
  95 {
  96         struct perf_sample synth_sample = {
  97         .pid       = -1,
  98         .tid       = -1,
  99         .time      = -1,
 100         .stream_id = -1,
 101         .cpu       = -1,
 102         .period    = 1,
 103         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 104         };
 105
 106         return process(tool, event, &synth_sample, machine);
 107 };
 108
 109 /*
 110  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 111  * the comm, tgid and ppid.
 112  */
 113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 114                                     pid_t *tgid, pid_t *ppid)
 115 {
 116         char filename[PATH_MAX];
 117         char bf[4096];
 118         int fd;
 119         size_t size = 0;
 120         ssize_t n;
 121         char *name, *tgids, *ppids;
 122
 123         *tgid = -1;
 124         *ppid = -1;
 125
 126         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 127
 128         fd = open(filename, O_RDONLY);
 129         if (fd < 0) {
 130                 pr_debug("couldn't open %s\n", filename);
 131                 return -1;
 132         }
 133
 134         n = read(fd, bf, sizeof(bf) - 1);
 135         close(fd);
 136         if (n <= 0) {
 137                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 138                            pid);
 139                 return -1;
 140         }
 141         bf[n] = '\0';
 142
 143         name = strstr(bf, "Name:");
 144         tgids = strstr(bf, "Tgid:");
 145         ppids = strstr(bf, "PPid:");
 146
 147         if (name) {
 148                 char *nl;
 149
 150                 name += 5;  /* strlen("Name:") */
 151                 name = ltrim(name);
 152
 153                 nl = strchr(name, '\n');
 154                 if (nl)
 155                         *nl = '\0';
 156
 157                 size = strlen(name);
 158                 if (size >= len)
 159                         size = len - 1;
 160                 memcpy(comm, name, size);
 161                 comm[size] = '\0';
 162         } else {
 163                 pr_debug("Name: string not found for pid %d\n", pid);
 164         }
 165
 166         if (tgids) {
 167                 tgids += 5;  /* strlen("Tgid:") */
 168                 *tgid = atoi(tgids);
 169         } else {
 170                 pr_debug("Tgid: string not found for pid %d\n", pid);
 171         }
 172
 173         if (ppids) {
 174                 ppids += 5;  /* strlen("PPid:") */
 175                 *ppid = atoi(ppids);
 176         } else {
 177                 pr_debug("PPid: string not found for pid %d\n", pid);
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 184                                     struct machine *machine,
 185                                     pid_t *tgid, pid_t *ppid)
 186 {
 187         size_t size;
 188
 189         *ppid = -1;
 190
 191         memset(&event->comm, 0, sizeof(event->comm));
 192
 193         if (machine__is_host(machine)) {
 194                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 195                                              sizeof(event->comm.comm),
 196                                              tgid, ppid) != 0) {
 197                         return -1;
 198                 }
 199         } else {
 200                 *tgid = machine->pid;
 201         }
 202
 203         if (*tgid < 0)
 204                 return -1;
 205
 206         event->comm.pid = *tgid;
 207         event->comm.header.type = PERF_RECORD_COMM;
 208
 209         size = strlen(event->comm.comm) + 1;
 210         size = PERF_ALIGN(size, sizeof(u64));
 211         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 212         event->comm.header.size = (sizeof(event->comm) -
 213                                 (sizeof(event->comm.comm) - size) +
 214                                 machine->id_hdr_size);
 215         event->comm.tid = pid;
 216
 217         return 0;
 218 }
 219
 220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 221                                          union perf_event *event, pid_t pid,
 222                                          perf_event__handler_t process,
 223                                          struct machine *machine)
 224 {
 225         pid_t tgid, ppid;
 226
 227         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 228                 return -1;
 229
 230         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 231                 return -1;
 232
 233         return tgid;
 234 }
 235
 236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 237                                          struct perf_ns_link_info *ns_link_info)
 238 {
 239         struct stat64 st;
 240         char proc_ns[128];
 241
 242         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 243         if (stat64(proc_ns, &st) == 0) {
 244                 ns_link_info->dev = st.st_dev;
 245                 ns_link_info->ino = st.st_ino;
 246         }
 247 }
 248
 249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 250                                       union perf_event *event,
 251                                       pid_t pid, pid_t tgid,
 252                                       perf_event__handler_t process,
 253                                       struct machine *machine)
 254 {
 255         u32 idx;
 256         struct perf_ns_link_info *ns_link_info;
 257
 258         if (!tool || !tool->namespace_events)
 259                 return 0;
 260
 261         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 262                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 263                machine->id_hdr_size));
 264
 265         event->namespaces.pid = tgid;
 266         event->namespaces.tid = pid;
 267
 268         event->namespaces.nr_namespaces = NR_NAMESPACES;
 269
 270         ns_link_info = event->namespaces.link_info;
 271
 272         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 273                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 274                                              &ns_link_info[idx]);
 275
 276         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 277
 278         event->namespaces.header.size = (sizeof(event->namespaces) +
 279                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 280                         machine->id_hdr_size);
 281
 282         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 283                 return -1;
 284
 285         return 0;
 286 }
 287
 288 static int perf_event__synthesize_fork(struct perf_tool *tool,
 289                                        union perf_event *event,
 290                                        pid_t pid, pid_t tgid, pid_t ppid,
 291                                        perf_event__handler_t process,
 292                                        struct machine *machine)
 293 {
 294         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 295
 296         /*
 297          * for main thread set parent to ppid from status file. For other
 298          * threads set parent pid to main thread. ie., assume main thread
 299          * spawns all threads in a process
 300         */
 301         if (tgid == pid) {
 302                 event->fork.ppid = ppid;
 303                 event->fork.ptid = ppid;
 304         } else {
 305                 event->fork.ppid = tgid;
 306                 event->fork.ptid = tgid;
 307         }
 308         event->fork.pid  = tgid;
 309         event->fork.tid  = pid;
 310         event->fork.header.type = PERF_RECORD_FORK;
 311
 312         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 313
 314         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 315                 return -1;
 316
 317         return 0;
 318 }
 319
 320 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 321                                        union perf_event *event,
 322                                        pid_t pid, pid_t tgid,
 323                                        perf_event__handler_t process,
 324                                        struct machine *machine,
 325                                        bool mmap_data,
 326                                        unsigned int proc_map_timeout)
 327 {
 328         char filename[PATH_MAX];
 329         FILE *fp;
 330         unsigned long long t;
 331         bool truncation = false;
 332         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 333         int rc = 0;
 334         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 335         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 336
 337         if (machine__is_default_guest(machine))
 338                 return 0;
 339
 340         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 341                  machine->root_dir, pid, pid);
 342
 343         fp = fopen(filename, "r");
 344         if (fp == NULL) {
 345                 /*
 346                  * We raced with a task exiting - just return:
 347                  */
 348                 pr_debug("couldn't open %s\n", filename);
 349                 return -1;
 350         }
 351
 352         event->header.type = PERF_RECORD_MMAP2;
 353         t = rdclock();
 354
 355         while (1) {
 356                 char bf[BUFSIZ];
 357                 char prot[5];
 358                 char execname[PATH_MAX];
 359                 char anonstr[] = "//anon";
 360                 unsigned int ino;
 361                 size_t size;
 362                 ssize_t n;
 363
 364                 if (fgets(bf, sizeof(bf), fp) == NULL)
 365                         break;
 366
 367                 if ((rdclock() - t) > timeout) {
 368                         pr_warning("Reading %s time out. "
 369                                    "You may want to increase "
 370                                    "the time limit by --proc-map-timeout\n",
 371                                    filename);
 372                         truncation = true;
 373                         goto out;
 374                 }
 375
 376                 /* ensure null termination since stack will be reused. */
 377                 strcpy(execname, "");
 378
 379                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 380                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 381                        &event->mmap2.start, &event->mmap2.len, prot,
 382                        &event->mmap2.pgoff, &event->mmap2.maj,
 383                        &event->mmap2.min,
 384                        &ino, execname);
 385
 386                 /*
 387                  * Anon maps don't have the execname.
 388                  */
 389                 if (n < 7)
 390                         continue;
 391
 392                 event->mmap2.ino = (u64)ino;
 393
 394                 /*
 395                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 396                  */
 397                 if (machine__is_host(machine))
 398                         event->header.misc = PERF_RECORD_MISC_USER;
 399                 else
 400                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 401
 402                 /* map protection and flags bits */
 403                 event->mmap2.prot = 0;
 404                 event->mmap2.flags = 0;
 405                 if (prot[0] == 'r')
 406                         event->mmap2.prot |= PROT_READ;
 407                 if (prot[1] == 'w')
 408                         event->mmap2.prot |= PROT_WRITE;
 409                 if (prot[2] == 'x')
 410                         event->mmap2.prot |= PROT_EXEC;
 411
 412                 if (prot[3] == 's')
 413                         event->mmap2.flags |= MAP_SHARED;
 414                 else
 415                         event->mmap2.flags |= MAP_PRIVATE;
 416
 417                 if (prot[2] != 'x') {
 418                         if (!mmap_data || prot[0] != 'r')
 419                                 continue;
 420
 421                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 422                 }
 423
 424 out:
 425                 if (truncation)
 426                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 427
 428                 if (!strcmp(execname, ""))
 429                         strcpy(execname, anonstr);
 430
 431                 if (hugetlbfs_mnt_len &&
 432                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 433                         strcpy(execname, anonstr);
 434                         event->mmap2.flags |= MAP_HUGETLB;
 435                 }
 436
 437                 size = strlen(execname) + 1;
 438                 memcpy(event->mmap2.filename, execname, size);
 439                 size = PERF_ALIGN(size, sizeof(u64));
 440                 event->mmap2.len -= event->mmap.start;
 441                 event->mmap2.header.size = (sizeof(event->mmap2) -
 442                                         (sizeof(event->mmap2.filename) - size));
 443                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 444                 event->mmap2.header.size += machine->id_hdr_size;
 445                 event->mmap2.pid = tgid;
 446                 event->mmap2.tid = pid;
 447
 448                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 449                         rc = -1;
 450                         break;
 451                 }
 452
 453                 if (truncation)
 454                         break;
 455         }
 456
 457         fclose(fp);
 458         return rc;
 459 }
 460
 461 int perf_event__synthesize_modules(struct perf_tool *tool,
 462                                    perf_event__handler_t process,
 463                                    struct machine *machine)
 464 {
 465         int rc = 0;
 466         struct map *pos;
 467         struct map_groups *kmaps = &machine->kmaps;
 468         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 469         union perf_event *event = zalloc((sizeof(event->mmap) +
 470                                           machine->id_hdr_size));
 471         if (event == NULL) {
 472                 pr_debug("Not enough memory synthesizing mmap event "
 473                          "for kernel modules\n");
 474                 return -1;
 475         }
 476
 477         event->header.type = PERF_RECORD_MMAP;
 478
 479         /*
 480          * kernel uses 0 for user space maps, see kernel/perf_event.c
 481          * __perf_event_mmap
 482          */
 483         if (machine__is_host(machine))
 484                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 485         else
 486                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 487
 488         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 489                 size_t size;
 490
 491                 if (__map__is_kernel(pos))
 492                         continue;
 493
 494                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 495                 event->mmap.header.type = PERF_RECORD_MMAP;
 496                 event->mmap.header.size = (sizeof(event->mmap) -
 497                                         (sizeof(event->mmap.filename) - size));
 498                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 499                 event->mmap.header.size += machine->id_hdr_size;
 500                 event->mmap.start = pos->start;
 501                 event->mmap.len   = pos->end - pos->start;
 502                 event->mmap.pid   = machine->pid;
 503
 504                 memcpy(event->mmap.filename, pos->dso->long_name,
 505                        pos->dso->long_name_len + 1);
 506                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 507                         rc = -1;
 508                         break;
 509                 }
 510         }
 511
 512         free(event);
 513         return rc;
 514 }
 515
 516 static int __event__synthesize_thread(union perf_event *comm_event,
 517                                       union perf_event *mmap_event,
 518                                       union perf_event *fork_event,
 519                                       union perf_event *namespaces_event,
 520                                       pid_t pid, int full,
 521                                       perf_event__handler_t process,
 522                                       struct perf_tool *tool,
 523                                       struct machine *machine,
 524                                       bool mmap_data,
 525                                       unsigned int proc_map_timeout)
 526 {
 527         char filename[PATH_MAX];
 528         DIR *tasks;
 529         struct dirent *dirent;
 530         pid_t tgid, ppid;
 531         int rc = 0;
 532
 533         /* special case: only send one comm event using passed in pid */
 534         if (!full) {
 535                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 536                                                    process, machine);
 537
 538                 if (tgid == -1)
 539                         return -1;
 540
 541                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 542                                                       tgid, process, machine) < 0)
 543                         return -1;
 544
 545
 546                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 547                                                           process, machine, mmap_data,
 548                                                           proc_map_timeout);
 549         }
 550
 551         if (machine__is_default_guest(machine))
 552                 return 0;
 553
 554         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 555                  machine->root_dir, pid);
 556
 557         tasks = opendir(filename);
 558         if (tasks == NULL) {
 559                 pr_debug("couldn't open %s\n", filename);
 560                 return 0;
 561         }
 562
 563         while ((dirent = readdir(tasks)) != NULL) {
 564                 char *end;
 565                 pid_t _pid;
 566
 567                 _pid = strtol(dirent->d_name, &end, 10);
 568                 if (*end)
 569                         continue;
 570
 571                 rc = -1;
 572                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 573                                              &tgid, &ppid) != 0)
 574                         break;
 575
 576                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 577                                                 ppid, process, machine) < 0)
 578                         break;
 579
 580                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 581                                                       tgid, process, machine) < 0)
 582                         break;
 583
 584                 /*
 585                  * Send the prepared comm event
 586                  */
 587                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 588                         break;
 589
 590                 rc = 0;
 591                 if (_pid == pid) {
 592                         /* process the parent's maps too */
 593                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 594                                                 process, machine, mmap_data, proc_map_timeout);
 595                         if (rc)
 596                                 break;
 597                 }
 598         }
 599
 600         closedir(tasks);
 601         return rc;
 602 }
 603
 604 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 605                                       struct thread_map *threads,
 606                                       perf_event__handler_t process,
 607                                       struct machine *machine,
 608                                       bool mmap_data,
 609                                       unsigned int proc_map_timeout)
 610 {
 611         union perf_event *comm_event, *mmap_event, *fork_event;
 612         union perf_event *namespaces_event;
 613         int err = -1, thread, j;
 614
 615         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 616         if (comm_event == NULL)
 617                 goto out;
 618
 619         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 620         if (mmap_event == NULL)
 621                 goto out_free_comm;
 622
 623         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 624         if (fork_event == NULL)
 625                 goto out_free_mmap;
 626
 627         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 628                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 629                                   machine->id_hdr_size);
 630         if (namespaces_event == NULL)
 631                 goto out_free_fork;
 632
 633         err = 0;
 634         for (thread = 0; thread < threads->nr; ++thread) {
 635                 if (__event__synthesize_thread(comm_event, mmap_event,
 636                                                fork_event, namespaces_event,
 637                                                thread_map__pid(threads, thread), 0,
 638                                                process, tool, machine,
 639                                                mmap_data, proc_map_timeout)) {
 640                         err = -1;
 641                         break;
 642                 }
 643
 644                 /*
 645                  * comm.pid is set to thread group id by
 646                  * perf_event__synthesize_comm
 647                  */
 648                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 649                         bool need_leader = true;
 650
 651                         /* is thread group leader in thread_map? */
 652                         for (j = 0; j < threads->nr; ++j) {
 653                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 654                                         need_leader = false;
 655                                         break;
 656                                 }
 657                         }
 658
 659                         /* if not, generate events for it */
 660                         if (need_leader &&
 661                             __event__synthesize_thread(comm_event, mmap_event,
 662                                                        fork_event, namespaces_event,
 663                                                        comm_event->comm.pid, 0,
 664                                                        process, tool, machine,
 665                                                        mmap_data, proc_map_timeout)) {
 666                                 err = -1;
 667                                 break;
 668                         }
 669                 }
 670         }
 671         free(namespaces_event);
 672 out_free_fork:
 673         free(fork_event);
 674 out_free_mmap:
 675         free(mmap_event);
 676 out_free_comm:
 677         free(comm_event);
 678 out:
 679         return err;
 680 }
 681
 682 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 683                                             perf_event__handler_t process,
 684                                             struct machine *machine,
 685                                             bool mmap_data,
 686                                             unsigned int proc_map_timeout,
 687                                             struct dirent **dirent,
 688                                             int start,
 689                                             int num)
 690 {
 691         union perf_event *comm_event, *mmap_event, *fork_event;
 692         union perf_event *namespaces_event;
 693         int err = -1;
 694         char *end;
 695         pid_t pid;
 696         int i;
 697
 698         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 699         if (comm_event == NULL)
 700                 goto out;
 701
 702         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 703         if (mmap_event == NULL)
 704                 goto out_free_comm;
 705
 706         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 707         if (fork_event == NULL)
 708                 goto out_free_mmap;
 709
 710         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 711                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 712                                   machine->id_hdr_size);
 713         if (namespaces_event == NULL)
 714                 goto out_free_fork;
 715
 716         for (i = start; i < start + num; i++) {
 717                 if (!isdigit(dirent[i]->d_name[0]))
 718                         continue;
 719
 720                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 721                 /* only interested in proper numerical dirents */
 722                 if (*end)
 723                         continue;
 724                 /*
 725                  * We may race with exiting thread, so don't stop just because
 726                  * one thread couldn't be synthesized.
 727                  */
 728                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 729                                            namespaces_event, pid, 1, process,
 730                                            tool, machine, mmap_data,
 731                                            proc_map_timeout);
 732         }
 733         err = 0;
 734
 735         free(namespaces_event);
 736 out_free_fork:
 737         free(fork_event);
 738 out_free_mmap:
 739         free(mmap_event);
 740 out_free_comm:
 741         free(comm_event);
 742 out:
 743         return err;
 744 }
 745
 746 struct synthesize_threads_arg {
 747         struct perf_tool *tool;
 748         perf_event__handler_t process;
 749         struct machine *machine;
 750         bool mmap_data;
 751         unsigned int proc_map_timeout;
 752         struct dirent **dirent;
 753         int num;
 754         int start;
 755 };
 756
 757 static void *synthesize_threads_worker(void *arg)
 758 {
 759         struct synthesize_threads_arg *args = arg;
 760
 761         __perf_event__synthesize_threads(args->tool, args->process,
 762                                          args->machine, args->mmap_data,
 763                                          args->proc_map_timeout, args->dirent,
 764                                          args->start, args->num);
 765         return NULL;
 766 }
 767
 768 int perf_event__synthesize_threads(struct perf_tool *tool,
 769                                    perf_event__handler_t process,
 770                                    struct machine *machine,
 771                                    bool mmap_data,
 772                                    unsigned int proc_map_timeout,
 773                                    unsigned int nr_threads_synthesize)
 774 {
 775         struct synthesize_threads_arg *args = NULL;
 776         pthread_t *synthesize_threads = NULL;
 777         char proc_path[PATH_MAX];
 778         struct dirent **dirent;
 779         int num_per_thread;
 780         int m, n, i, j;
 781         int thread_nr;
 782         int base = 0;
 783         int err = -1;
 784
 785
 786         if (machine__is_default_guest(machine))
 787                 return 0;
 788
 789         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 790         n = scandir(proc_path, &dirent, 0, alphasort);
 791         if (n < 0)
 792                 return err;
 793
 794         if (nr_threads_synthesize == UINT_MAX)
 795                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 796         else
 797                 thread_nr = nr_threads_synthesize;
 798
 799         if (thread_nr <= 1) {
 800                 err = __perf_event__synthesize_threads(tool, process,
 801                                                        machine, mmap_data,
 802                                                        proc_map_timeout,
 803                                                        dirent, base, n);
 804                 goto free_dirent;
 805         }
 806         if (thread_nr > n)
 807                 thread_nr = n;
 808
 809         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 810         if (synthesize_threads == NULL)
 811                 goto free_dirent;
 812
 813         args = calloc(sizeof(*args), thread_nr);
 814         if (args == NULL)
 815                 goto free_threads;
 816
 817         num_per_thread = n / thread_nr;
 818         m = n % thread_nr;
 819         for (i = 0; i < thread_nr; i++) {
 820                 args[i].tool = tool;
 821                 args[i].process = process;
 822                 args[i].machine = machine;
 823                 args[i].mmap_data = mmap_data;
 824                 args[i].proc_map_timeout = proc_map_timeout;
 825                 args[i].dirent = dirent;
 826         }
 827         for (i = 0; i < m; i++) {
 828                 args[i].num = num_per_thread + 1;
 829                 args[i].start = i * args[i].num;
 830         }
 831         if (i != 0)
 832                 base = args[i-1].start + args[i-1].num;
 833         for (j = i; j < thread_nr; j++) {
 834                 args[j].num = num_per_thread;
 835                 args[j].start = base + (j - i) * args[i].num;
 836         }
 837
 838         for (i = 0; i < thread_nr; i++) {
 839                 if (pthread_create(&synthesize_threads[i], NULL,
 840                                    synthesize_threads_worker, &args[i]))
 841                         goto out_join;
 842         }
 843         err = 0;
 844 out_join:
 845         for (i = 0; i < thread_nr; i++)
 846                 pthread_join(synthesize_threads[i], NULL);
 847         free(args);
 848 free_threads:
 849         free(synthesize_threads);
 850 free_dirent:
 851         for (i = 0; i < n; i++)
 852                 free(dirent[i]);
 853         free(dirent);
 854
 855         return err;
 856 }
 857
 858 struct process_symbol_args {
 859         const char *name;
 860         u64        start;
 861 };
 862
 863 static int find_symbol_cb(void *arg, const char *name, char type,
 864                           u64 start)
 865 {
 866         struct process_symbol_args *args = arg;
 867
 868         /*
 869          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 870          * an 'A' to the same address as "_stext".
 871          */
 872         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 873               type == 'A') || strcmp(name, args->name))
 874                 return 0;
 875
 876         args->start = start;
 877         return 1;
 878 }
 879
 880 int kallsyms__get_function_start(const char *kallsyms_filename,
 881                                  const char *symbol_name, u64 *addr)
 882 {
 883         struct process_symbol_args args = { .name = symbol_name, };
 884
 885         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 886                 return -1;
 887
 888         *addr = args.start;
 889         return 0;
 890 }
 891
 892 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 893                                        perf_event__handler_t process,
 894                                        struct machine *machine)
 895 {
 896         size_t size;
 897         struct map *map = machine__kernel_map(machine);
 898         struct kmap *kmap;
 899         int err;
 900         union perf_event *event;
 901
 902         if (symbol_conf.kptr_restrict)
 903                 return -1;
 904         if (map == NULL)
 905                 return -1;
 906
 907         /*
 908          * We should get this from /sys/kernel/sections/.text, but till that is
 909          * available use this, and after it is use this as a fallback for older
 910          * kernels.
 911          */
 912         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 913         if (event == NULL) {
 914                 pr_debug("Not enough memory synthesizing mmap event "
 915                          "for kernel modules\n");
 916                 return -1;
 917         }
 918
 919         if (machine__is_host(machine)) {
 920                 /*
 921                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 922                  * see kernel/perf_event.c __perf_event_mmap
 923                  */
 924                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 925         } else {
 926                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 927         }
 928
 929         kmap = map__kmap(map);
 930         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 931                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 932         size = PERF_ALIGN(size, sizeof(u64));
 933         event->mmap.header.type = PERF_RECORD_MMAP;
 934         event->mmap.header.size = (sizeof(event->mmap) -
 935                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 936         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 937         event->mmap.start = map->start;
 938         event->mmap.len   = map->end - event->mmap.start;
 939         event->mmap.pid   = machine->pid;
 940
 941         err = perf_tool__process_synth_event(tool, event, machine, process);
 942         free(event);
 943
 944         return err;
 945 }
 946
 947 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 948                                       struct thread_map *threads,
 949                                       perf_event__handler_t process,
 950                                       struct machine *machine)
 951 {
 952         union perf_event *event;
 953         int i, err, size;
 954
 955         size  = sizeof(event->thread_map);
 956         size += threads->nr * sizeof(event->thread_map.entries[0]);
 957
 958         event = zalloc(size);
 959         if (!event)
 960                 return -ENOMEM;
 961
 962         event->header.type = PERF_RECORD_THREAD_MAP;
 963         event->header.size = size;
 964         event->thread_map.nr = threads->nr;
 965
 966         for (i = 0; i < threads->nr; i++) {
 967                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 968                 char *comm = thread_map__comm(threads, i);
 969
 970                 if (!comm)
 971                         comm = (char *) "";
 972
 973                 entry->pid = thread_map__pid(threads, i);
 974                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 975         }
 976
 977         err = process(tool, event, NULL, machine);
 978
 979         free(event);
 980         return err;
 981 }
 982
 983 static void synthesize_cpus(struct cpu_map_entries *cpus,
 984                             struct cpu_map *map)
 985 {
 986         int i;
 987
 988         cpus->nr = map->nr;
 989
 990         for (i = 0; i < map->nr; i++)
 991                 cpus->cpu[i] = map->map[i];
 992 }
 993
 994 static void synthesize_mask(struct cpu_map_mask *mask,
 995                             struct cpu_map *map, int max)
 996 {
 997         int i;
 998
 999         mask->nr = BITS_TO_LONGS(max);
1000         mask->long_size = sizeof(long);
1001
1002         for (i = 0; i < map->nr; i++)
1003                 set_bit(map->map[i], mask->mask);
1004 }
1005
1006 static size_t cpus_size(struct cpu_map *map)
1007 {
1008         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1009 }
1010
1011 static size_t mask_size(struct cpu_map *map, int *max)
1012 {
1013         int i;
1014
1015         *max = 0;
1016
1017         for (i = 0; i < map->nr; i++) {
1018                 /* bit possition of the cpu is + 1 */
1019                 int bit = map->map[i] + 1;
1020
1021                 if (bit > *max)
1022                         *max = bit;
1023         }
1024
1025         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1026 }
1027
1028 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1029 {
1030         size_t size_cpus, size_mask;
1031         bool is_dummy = cpu_map__empty(map);
1032
1033         /*
1034          * Both array and mask data have variable size based
1035          * on the number of cpus and their actual values.
1036          * The size of the 'struct cpu_map_data' is:
1037          *
1038          *   array = size of 'struct cpu_map_entries' +
1039          *           number of cpus * sizeof(u64)
1040          *
1041          *   mask  = size of 'struct cpu_map_mask' +
1042          *           maximum cpu bit converted to size of longs
1043          *
1044          * and finaly + the size of 'struct cpu_map_data'.
1045          */
1046         size_cpus = cpus_size(map);
1047         size_mask = mask_size(map, max);
1048
1049         if (is_dummy || (size_cpus < size_mask)) {
1050                 *size += size_cpus;
1051                 *type  = PERF_CPU_MAP__CPUS;
1052         } else {
1053                 *size += size_mask;
1054                 *type  = PERF_CPU_MAP__MASK;
1055         }
1056
1057         *size += sizeof(struct cpu_map_data);
1058         return zalloc(*size);
1059 }
1060
1061 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1062                               u16 type, int max)
1063 {
1064         data->type = type;
1065
1066         switch (type) {
1067         case PERF_CPU_MAP__CPUS:
1068                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1069                 break;
1070         case PERF_CPU_MAP__MASK:
1071                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1072         default:
1073                 break;
1074         };
1075 }
1076
1077 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1078 {
1079         size_t size = sizeof(struct cpu_map_event);
1080         struct cpu_map_event *event;
1081         int max;
1082         u16 type;
1083
1084         event = cpu_map_data__alloc(map, &size, &type, &max);
1085         if (!event)
1086                 return NULL;
1087
1088         event->header.type = PERF_RECORD_CPU_MAP;
1089         event->header.size = size;
1090         event->data.type   = type;
1091
1092         cpu_map_data__synthesize(&event->data, map, type, max);
1093         return event;
1094 }
1095
1096 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1097                                    struct cpu_map *map,
1098                                    perf_event__handler_t process,
1099                                    struct machine *machine)
1100 {
1101         struct cpu_map_event *event;
1102         int err;
1103
1104         event = cpu_map_event__new(map);
1105         if (!event)
1106                 return -ENOMEM;
1107
1108         err = process(tool, (union perf_event *) event, NULL, machine);
1109
1110         free(event);
1111         return err;
1112 }
1113
1114 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1115                                        struct perf_stat_config *config,
1116                                        perf_event__handler_t process,
1117                                        struct machine *machine)
1118 {
1119         struct stat_config_event *event;
1120         int size, i = 0, err;
1121
1122         size  = sizeof(*event);
1123         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1124
1125         event = zalloc(size);
1126         if (!event)
1127                 return -ENOMEM;
1128
1129         event->header.type = PERF_RECORD_STAT_CONFIG;
1130         event->header.size = size;
1131         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1132
1133 #define ADD(__term, __val)                                      \
1134         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1135         event->data[i].val = __val;                             \
1136         i++;
1137
1138         ADD(AGGR_MODE,  config->aggr_mode)
1139         ADD(INTERVAL,   config->interval)
1140         ADD(SCALE,      config->scale)
1141
1142         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1143                   "stat config terms unbalanced\n");
1144 #undef ADD
1145
1146         err = process(tool, (union perf_event *) event, NULL, machine);
1147
1148         free(event);
1149         return err;
1150 }
1151
1152 int perf_event__synthesize_stat(struct perf_tool *tool,
1153                                 u32 cpu, u32 thread, u64 id,
1154                                 struct perf_counts_values *count,
1155                                 perf_event__handler_t process,
1156                                 struct machine *machine)
1157 {
1158         struct stat_event event;
1159
1160         event.header.type = PERF_RECORD_STAT;
1161         event.header.size = sizeof(event);
1162         event.header.misc = 0;
1163
1164         event.id        = id;
1165         event.cpu       = cpu;
1166         event.thread    = thread;
1167         event.val       = count->val;
1168         event.ena       = count->ena;
1169         event.run       = count->run;
1170
1171         return process(tool, (union perf_event *) &event, NULL, machine);
1172 }
1173
1174 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1175                                       u64 evtime, u64 type,
1176                                       perf_event__handler_t process,
1177                                       struct machine *machine)
1178 {
1179         struct stat_round_event event;
1180
1181         event.header.type = PERF_RECORD_STAT_ROUND;
1182         event.header.size = sizeof(event);
1183         event.header.misc = 0;
1184
1185         event.time = evtime;
1186         event.type = type;
1187
1188         return process(tool, (union perf_event *) &event, NULL, machine);
1189 }
1190
1191 void perf_event__read_stat_config(struct perf_stat_config *config,
1192                                   struct stat_config_event *event)
1193 {
1194         unsigned i;
1195
1196         for (i = 0; i < event->nr; i++) {
1197
1198                 switch (event->data[i].tag) {
1199 #define CASE(__term, __val)                                     \
1200                 case PERF_STAT_CONFIG_TERM__##__term:           \
1201                         config->__val = event->data[i].val;     \
1202                         break;
1203
1204                 CASE(AGGR_MODE, aggr_mode)
1205                 CASE(SCALE,     scale)
1206                 CASE(INTERVAL,  interval)
1207 #undef CASE
1208                 default:
1209                         pr_warning("unknown stat config term %" PRIu64 "\n",
1210                                    event->data[i].tag);
1211                 }
1212         }
1213 }
1214
1215 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1216 {
1217         const char *s;
1218
1219         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1220                 s = " exec";
1221         else
1222                 s = "";
1223
1224         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1225 }
1226
1227 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1228 {
1229         size_t ret = 0;
1230         struct perf_ns_link_info *ns_link_info;
1231         u32 nr_namespaces, idx;
1232
1233         ns_link_info = event->namespaces.link_info;
1234         nr_namespaces = event->namespaces.nr_namespaces;
1235
1236         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1237                        event->namespaces.pid,
1238                        event->namespaces.tid,
1239                        nr_namespaces);
1240
1241         for (idx = 0; idx < nr_namespaces; idx++) {
1242                 if (idx && (idx % 4 == 0))
1243                         ret += fprintf(fp, "\n\t\t ");
1244
1245                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1246                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1247                                 (u64)ns_link_info[idx].ino,
1248                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1249         }
1250
1251         return ret;
1252 }
1253
1254 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1255                              union perf_event *event,
1256                              struct perf_sample *sample,
1257                              struct machine *machine)
1258 {
1259         return machine__process_comm_event(machine, event, sample);
1260 }
1261
1262 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1263                                    union perf_event *event,
1264                                    struct perf_sample *sample,
1265                                    struct machine *machine)
1266 {
1267         return machine__process_namespaces_event(machine, event, sample);
1268 }
1269
1270 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1271                              union perf_event *event,
1272                              struct perf_sample *sample,
1273                              struct machine *machine)
1274 {
1275         return machine__process_lost_event(machine, event, sample);
1276 }
1277
1278 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1279                             union perf_event *event,
1280                             struct perf_sample *sample __maybe_unused,
1281                             struct machine *machine)
1282 {
1283         return machine__process_aux_event(machine, event);
1284 }
1285
1286 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1287                                      union perf_event *event,
1288                                      struct perf_sample *sample __maybe_unused,
1289                                      struct machine *machine)
1290 {
1291         return machine__process_itrace_start_event(machine, event);
1292 }
1293
1294 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1295                                      union perf_event *event,
1296                                      struct perf_sample *sample,
1297                                      struct machine *machine)
1298 {
1299         return machine__process_lost_samples_event(machine, event, sample);
1300 }
1301
1302 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1303                                union perf_event *event,
1304                                struct perf_sample *sample __maybe_unused,
1305                                struct machine *machine)
1306 {
1307         return machine__process_switch_event(machine, event);
1308 }
1309
1310 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1311 {
1312         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1313                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1314                        event->mmap.len, event->mmap.pgoff,
1315                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1316                        event->mmap.filename);
1317 }
1318
1319 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1320 {
1321         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1322                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1323                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1324                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1325                        event->mmap2.min, event->mmap2.ino,
1326                        event->mmap2.ino_generation,
1327                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1328                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1329                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1330                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1331                        event->mmap2.filename);
1332 }
1333
1334 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1335 {
1336         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1337         size_t ret;
1338
1339         ret = fprintf(fp, " nr: ");
1340
1341         if (threads)
1342                 ret += thread_map__fprintf(threads, fp);
1343         else
1344                 ret += fprintf(fp, "failed to get threads from event\n");
1345
1346         thread_map__put(threads);
1347         return ret;
1348 }
1349
1350 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1351 {
1352         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1353         size_t ret;
1354
1355         ret = fprintf(fp, ": ");
1356
1357         if (cpus)
1358                 ret += cpu_map__fprintf(cpus, fp);
1359         else
1360                 ret += fprintf(fp, "failed to get cpumap from event\n");
1361
1362         cpu_map__put(cpus);
1363         return ret;
1364 }
1365
1366 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1367                              union perf_event *event,
1368                              struct perf_sample *sample,
1369                              struct machine *machine)
1370 {
1371         return machine__process_mmap_event(machine, event, sample);
1372 }
1373
1374 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1375                              union perf_event *event,
1376                              struct perf_sample *sample,
1377                              struct machine *machine)
1378 {
1379         return machine__process_mmap2_event(machine, event, sample);
1380 }
1381
1382 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1383 {
1384         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1385                        event->fork.pid, event->fork.tid,
1386                        event->fork.ppid, event->fork.ptid);
1387 }
1388
1389 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1390                              union perf_event *event,
1391                              struct perf_sample *sample,
1392                              struct machine *machine)
1393 {
1394         return machine__process_fork_event(machine, event, sample);
1395 }
1396
1397 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1398                              union perf_event *event,
1399                              struct perf_sample *sample,
1400                              struct machine *machine)
1401 {
1402         return machine__process_exit_event(machine, event, sample);
1403 }
1404
1405 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1406 {
1407         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1408                        event->aux.aux_offset, event->aux.aux_size,
1409                        event->aux.flags,
1410                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1411                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1412                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1413 }
1414
1415 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1416 {
1417         return fprintf(fp, " pid: %u tid: %u\n",
1418                        event->itrace_start.pid, event->itrace_start.tid);
1419 }
1420
1421 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1422 {
1423         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1424         const char *in_out = out ? "OUT" : "IN ";
1425
1426         if (event->header.type == PERF_RECORD_SWITCH)
1427                 return fprintf(fp, " %s\n", in_out);
1428
1429         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1430                        in_out, out ? "next" : "prev",
1431                        event->context_switch.next_prev_pid,
1432                        event->context_switch.next_prev_tid);
1433 }
1434
1435 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1436 {
1437         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1438 }
1439
1440 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1441 {
1442         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1443                              perf_event__name(event->header.type));
1444
1445         switch (event->header.type) {
1446         case PERF_RECORD_COMM:
1447                 ret += perf_event__fprintf_comm(event, fp);
1448                 break;
1449         case PERF_RECORD_FORK:
1450         case PERF_RECORD_EXIT:
1451                 ret += perf_event__fprintf_task(event, fp);
1452                 break;
1453         case PERF_RECORD_MMAP:
1454                 ret += perf_event__fprintf_mmap(event, fp);
1455                 break;
1456         case PERF_RECORD_NAMESPACES:
1457                 ret += perf_event__fprintf_namespaces(event, fp);
1458                 break;
1459         case PERF_RECORD_MMAP2:
1460                 ret += perf_event__fprintf_mmap2(event, fp);
1461                 break;
1462         case PERF_RECORD_AUX:
1463                 ret += perf_event__fprintf_aux(event, fp);
1464                 break;
1465         case PERF_RECORD_ITRACE_START:
1466                 ret += perf_event__fprintf_itrace_start(event, fp);
1467                 break;
1468         case PERF_RECORD_SWITCH:
1469         case PERF_RECORD_SWITCH_CPU_WIDE:
1470                 ret += perf_event__fprintf_switch(event, fp);
1471                 break;
1472         case PERF_RECORD_LOST:
1473                 ret += perf_event__fprintf_lost(event, fp);
1474                 break;
1475         default:
1476                 ret += fprintf(fp, "\n");
1477         }
1478
1479         return ret;
1480 }
1481
1482 int perf_event__process(struct perf_tool *tool __maybe_unused,
1483                         union perf_event *event,
1484                         struct perf_sample *sample,
1485                         struct machine *machine)
1486 {
1487         return machine__process_event(machine, event, sample);
1488 }
1489
1490 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1491                            enum map_type type, u64 addr,
1492                            struct addr_location *al)
1493 {
1494         struct map_groups *mg = thread->mg;
1495         struct machine *machine = mg->machine;
1496         bool load_map = false;
1497
1498         al->machine = machine;
1499         al->thread = thread;
1500         al->addr = addr;
1501         al->cpumode = cpumode;
1502         al->filtered = 0;
1503
1504         if (machine == NULL) {
1505                 al->map = NULL;
1506                 return;
1507         }
1508
1509         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1510                 al->level = 'k';
1511                 mg = &machine->kmaps;
1512                 load_map = true;
1513         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1514                 al->level = '.';
1515         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1516                 al->level = 'g';
1517                 mg = &machine->kmaps;
1518                 load_map = true;
1519         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1520                 al->level = 'u';
1521         } else {
1522                 al->level = 'H';
1523                 al->map = NULL;
1524
1525                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1526                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1527                         !perf_guest)
1528                         al->filtered |= (1 << HIST_FILTER__GUEST);
1529                 if ((cpumode == PERF_RECORD_MISC_USER ||
1530                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1531                         !perf_host)
1532                         al->filtered |= (1 << HIST_FILTER__HOST);
1533
1534                 return;
1535         }
1536 try_again:
1537         al->map = map_groups__find(mg, type, al->addr);
1538         if (al->map == NULL) {
1539                 /*
1540                  * If this is outside of all known maps, and is a negative
1541                  * address, try to look it up in the kernel dso, as it might be
1542                  * a vsyscall or vdso (which executes in user-mode).
1543                  *
1544                  * XXX This is nasty, we should have a symbol list in the
1545                  * "[vdso]" dso, but for now lets use the old trick of looking
1546                  * in the whole kernel symbol list.
1547                  */
1548                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1549                     mg != &machine->kmaps &&
1550                     machine__kernel_ip(machine, al->addr)) {
1551                         mg = &machine->kmaps;
1552                         load_map = true;
1553                         goto try_again;
1554                 }
1555         } else {
1556                 /*
1557                  * Kernel maps might be changed when loading symbols so loading
1558                  * must be done prior to using kernel maps.
1559                  */
1560                 if (load_map)
1561                         map__load(al->map);
1562                 al->addr = al->map->map_ip(al->map, al->addr);
1563         }
1564 }
1565
1566 void thread__find_addr_location(struct thread *thread,
1567                                 u8 cpumode, enum map_type type, u64 addr,
1568                                 struct addr_location *al)
1569 {
1570         thread__find_addr_map(thread, cpumode, type, addr, al);
1571         if (al->map != NULL)
1572                 al->sym = map__find_symbol(al->map, al->addr);
1573         else
1574                 al->sym = NULL;
1575 }
1576
1577 /*
1578  * Callers need to drop the reference to al->thread, obtained in
1579  * machine__findnew_thread()
1580  */
1581 int machine__resolve(struct machine *machine, struct addr_location *al,
1582                      struct perf_sample *sample)
1583 {
1584         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1585                                                         sample->tid);
1586
1587         if (thread == NULL)
1588                 return -1;
1589
1590         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1591         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1592         dump_printf(" ...... dso: %s\n",
1593                     al->map ? al->map->dso->long_name :
1594                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1595
1596         if (thread__is_filtered(thread))
1597                 al->filtered |= (1 << HIST_FILTER__THREAD);
1598
1599         al->sym = NULL;
1600         al->cpu = sample->cpu;
1601         al->socket = -1;
1602         al->srcline = NULL;
1603
1604         if (al->cpu >= 0) {
1605                 struct perf_env *env = machine->env;
1606
1607                 if (env && env->cpu)
1608                         al->socket = env->cpu[al->cpu].socket_id;
1609         }
1610
1611         if (al->map) {
1612                 struct dso *dso = al->map->dso;
1613
1614                 if (symbol_conf.dso_list &&
1615                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1616                                                   dso->short_name) ||
1617                                (dso->short_name != dso->long_name &&
1618                                 strlist__has_entry(symbol_conf.dso_list,
1619                                                    dso->long_name))))) {
1620                         al->filtered |= (1 << HIST_FILTER__DSO);
1621                 }
1622
1623                 al->sym = map__find_symbol(al->map, al->addr);
1624         }
1625
1626         if (symbol_conf.sym_list &&
1627                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1628                                                 al->sym->name))) {
1629                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1630         }
1631
1632         return 0;
1633 }
1634
1635 /*
1636  * The preprocess_sample method will return with reference counts for the
1637  * in it, when done using (and perhaps getting ref counts if needing to
1638  * keep a pointer to one of those entries) it must be paired with
1639  * addr_location__put(), so that the refcounts can be decremented.
1640  */
1641 void addr_location__put(struct addr_location *al)
1642 {
1643         thread__zput(al->thread);
1644 }
1645
1646 bool is_bts_event(struct perf_event_attr *attr)
1647 {
1648         return attr->type == PERF_TYPE_HARDWARE &&
1649                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1650                attr->sample_period == 1;
1651 }
1652
1653 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1654 {
1655         if (attr->type == PERF_TYPE_SOFTWARE &&
1656             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1657              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1658              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1659                 return true;
1660
1661         if (is_bts_event(attr))
1662                 return true;
1663
1664         return false;
1665 }
1666
1667 void thread__resolve(struct thread *thread, struct addr_location *al,
1668                      struct perf_sample *sample)
1669 {
1670         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1671         if (!al->map)
1672                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1673                                       sample->addr, al);
1674
1675         al->cpu = sample->cpu;
1676         al->sym = NULL;
1677
1678         if (al->map)
1679                 al->sym = map__find_symbol(al->map, al->addr);
1680 }