tools/perf/util/event.c

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