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 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 maps *maps = machine__kernel_maps(machine);
 468         union perf_event *event = zalloc((sizeof(event->mmap) +
 469                                           machine->id_hdr_size));
 470         if (event == NULL) {
 471                 pr_debug("Not enough memory synthesizing mmap event "
 472                          "for kernel modules\n");
 473                 return -1;
 474         }
 475
 476         event->header.type = PERF_RECORD_MMAP;
 477
 478         /*
 479          * kernel uses 0 for user space maps, see kernel/perf_event.c
 480          * __perf_event_mmap
 481          */
 482         if (machine__is_host(machine))
 483                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 484         else
 485                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 486
 487         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 488                 size_t size;
 489
 490                 if (!__map__is_kmodule(pos))
 491                         continue;
 492
 493                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 494                 event->mmap.header.type = PERF_RECORD_MMAP;
 495                 event->mmap.header.size = (sizeof(event->mmap) -
 496                                         (sizeof(event->mmap.filename) - size));
 497                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 498                 event->mmap.header.size += machine->id_hdr_size;
 499                 event->mmap.start = pos->start;
 500                 event->mmap.len   = pos->end - pos->start;
 501                 event->mmap.pid   = machine->pid;
 502
 503                 memcpy(event->mmap.filename, pos->dso->long_name,
 504                        pos->dso->long_name_len + 1);
 505                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 506                         rc = -1;
 507                         break;
 508                 }
 509         }
 510
 511         free(event);
 512         return rc;
 513 }
 514
 515 static int __event__synthesize_thread(union perf_event *comm_event,
 516                                       union perf_event *mmap_event,
 517                                       union perf_event *fork_event,
 518                                       union perf_event *namespaces_event,
 519                                       pid_t pid, int full,
 520                                       perf_event__handler_t process,
 521                                       struct perf_tool *tool,
 522                                       struct machine *machine,
 523                                       bool mmap_data,
 524                                       unsigned int proc_map_timeout)
 525 {
 526         char filename[PATH_MAX];
 527         DIR *tasks;
 528         struct dirent *dirent;
 529         pid_t tgid, ppid;
 530         int rc = 0;
 531
 532         /* special case: only send one comm event using passed in pid */
 533         if (!full) {
 534                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 535                                                    process, machine);
 536
 537                 if (tgid == -1)
 538                         return -1;
 539
 540                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 541                                                       tgid, process, machine) < 0)
 542                         return -1;
 543
 544                 /*
 545                  * send mmap only for thread group leader
 546                  * see thread__init_map_groups
 547                  */
 548                 if (pid == tgid &&
 549                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 550                                                        process, machine, mmap_data,
 551                                                        proc_map_timeout))
 552                         return -1;
 553
 554                 return 0;
 555         }
 556
 557         if (machine__is_default_guest(machine))
 558                 return 0;
 559
 560         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 561                  machine->root_dir, pid);
 562
 563         tasks = opendir(filename);
 564         if (tasks == NULL) {
 565                 pr_debug("couldn't open %s\n", filename);
 566                 return 0;
 567         }
 568
 569         while ((dirent = readdir(tasks)) != NULL) {
 570                 char *end;
 571                 pid_t _pid;
 572
 573                 _pid = strtol(dirent->d_name, &end, 10);
 574                 if (*end)
 575                         continue;
 576
 577                 rc = -1;
 578                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 579                                              &tgid, &ppid) != 0)
 580                         break;
 581
 582                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 583                                                 ppid, process, machine) < 0)
 584                         break;
 585
 586                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 587                                                       tgid, process, machine) < 0)
 588                         break;
 589
 590                 /*
 591                  * Send the prepared comm event
 592                  */
 593                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 594                         break;
 595
 596                 rc = 0;
 597                 if (_pid == pid) {
 598                         /* process the parent's maps too */
 599                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 600                                                 process, machine, mmap_data, proc_map_timeout);
 601                         if (rc)
 602                                 break;
 603                 }
 604         }
 605
 606         closedir(tasks);
 607         return rc;
 608 }
 609
 610 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 611                                       struct thread_map *threads,
 612                                       perf_event__handler_t process,
 613                                       struct machine *machine,
 614                                       bool mmap_data,
 615                                       unsigned int proc_map_timeout)
 616 {
 617         union perf_event *comm_event, *mmap_event, *fork_event;
 618         union perf_event *namespaces_event;
 619         int err = -1, thread, j;
 620
 621         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 622         if (comm_event == NULL)
 623                 goto out;
 624
 625         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 626         if (mmap_event == NULL)
 627                 goto out_free_comm;
 628
 629         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 630         if (fork_event == NULL)
 631                 goto out_free_mmap;
 632
 633         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 634                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 635                                   machine->id_hdr_size);
 636         if (namespaces_event == NULL)
 637                 goto out_free_fork;
 638
 639         err = 0;
 640         for (thread = 0; thread < threads->nr; ++thread) {
 641                 if (__event__synthesize_thread(comm_event, mmap_event,
 642                                                fork_event, namespaces_event,
 643                                                thread_map__pid(threads, thread), 0,
 644                                                process, tool, machine,
 645                                                mmap_data, proc_map_timeout)) {
 646                         err = -1;
 647                         break;
 648                 }
 649
 650                 /*
 651                  * comm.pid is set to thread group id by
 652                  * perf_event__synthesize_comm
 653                  */
 654                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 655                         bool need_leader = true;
 656
 657                         /* is thread group leader in thread_map? */
 658                         for (j = 0; j < threads->nr; ++j) {
 659                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 660                                         need_leader = false;
 661                                         break;
 662                                 }
 663                         }
 664
 665                         /* if not, generate events for it */
 666                         if (need_leader &&
 667                             __event__synthesize_thread(comm_event, mmap_event,
 668                                                        fork_event, namespaces_event,
 669                                                        comm_event->comm.pid, 0,
 670                                                        process, tool, machine,
 671                                                        mmap_data, proc_map_timeout)) {
 672                                 err = -1;
 673                                 break;
 674                         }
 675                 }
 676         }
 677         free(namespaces_event);
 678 out_free_fork:
 679         free(fork_event);
 680 out_free_mmap:
 681         free(mmap_event);
 682 out_free_comm:
 683         free(comm_event);
 684 out:
 685         return err;
 686 }
 687
 688 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 689                                             perf_event__handler_t process,
 690                                             struct machine *machine,
 691                                             bool mmap_data,
 692                                             unsigned int proc_map_timeout,
 693                                             struct dirent **dirent,
 694                                             int start,
 695                                             int num)
 696 {
 697         union perf_event *comm_event, *mmap_event, *fork_event;
 698         union perf_event *namespaces_event;
 699         int err = -1;
 700         char *end;
 701         pid_t pid;
 702         int i;
 703
 704         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 705         if (comm_event == NULL)
 706                 goto out;
 707
 708         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 709         if (mmap_event == NULL)
 710                 goto out_free_comm;
 711
 712         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 713         if (fork_event == NULL)
 714                 goto out_free_mmap;
 715
 716         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 717                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 718                                   machine->id_hdr_size);
 719         if (namespaces_event == NULL)
 720                 goto out_free_fork;
 721
 722         for (i = start; i < start + num; i++) {
 723                 if (!isdigit(dirent[i]->d_name[0]))
 724                         continue;
 725
 726                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 727                 /* only interested in proper numerical dirents */
 728                 if (*end)
 729                         continue;
 730                 /*
 731                  * We may race with exiting thread, so don't stop just because
 732                  * one thread couldn't be synthesized.
 733                  */
 734                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 735                                            namespaces_event, pid, 1, process,
 736                                            tool, machine, mmap_data,
 737                                            proc_map_timeout);
 738         }
 739         err = 0;
 740
 741         free(namespaces_event);
 742 out_free_fork:
 743         free(fork_event);
 744 out_free_mmap:
 745         free(mmap_event);
 746 out_free_comm:
 747         free(comm_event);
 748 out:
 749         return err;
 750 }
 751
 752 struct synthesize_threads_arg {
 753         struct perf_tool *tool;
 754         perf_event__handler_t process;
 755         struct machine *machine;
 756         bool mmap_data;
 757         unsigned int proc_map_timeout;
 758         struct dirent **dirent;
 759         int num;
 760         int start;
 761 };
 762
 763 static void *synthesize_threads_worker(void *arg)
 764 {
 765         struct synthesize_threads_arg *args = arg;
 766
 767         __perf_event__synthesize_threads(args->tool, args->process,
 768                                          args->machine, args->mmap_data,
 769                                          args->proc_map_timeout, args->dirent,
 770                                          args->start, args->num);
 771         return NULL;
 772 }
 773
 774 int perf_event__synthesize_threads(struct perf_tool *tool,
 775                                    perf_event__handler_t process,
 776                                    struct machine *machine,
 777                                    bool mmap_data,
 778                                    unsigned int proc_map_timeout,
 779                                    unsigned int nr_threads_synthesize)
 780 {
 781         struct synthesize_threads_arg *args = NULL;
 782         pthread_t *synthesize_threads = NULL;
 783         char proc_path[PATH_MAX];
 784         struct dirent **dirent;
 785         int num_per_thread;
 786         int m, n, i, j;
 787         int thread_nr;
 788         int base = 0;
 789         int err = -1;
 790
 791
 792         if (machine__is_default_guest(machine))
 793                 return 0;
 794
 795         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 796         n = scandir(proc_path, &dirent, 0, alphasort);
 797         if (n < 0)
 798                 return err;
 799
 800         if (nr_threads_synthesize == UINT_MAX)
 801                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 802         else
 803                 thread_nr = nr_threads_synthesize;
 804
 805         if (thread_nr <= 1) {
 806                 err = __perf_event__synthesize_threads(tool, process,
 807                                                        machine, mmap_data,
 808                                                        proc_map_timeout,
 809                                                        dirent, base, n);
 810                 goto free_dirent;
 811         }
 812         if (thread_nr > n)
 813                 thread_nr = n;
 814
 815         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 816         if (synthesize_threads == NULL)
 817                 goto free_dirent;
 818
 819         args = calloc(sizeof(*args), thread_nr);
 820         if (args == NULL)
 821                 goto free_threads;
 822
 823         num_per_thread = n / thread_nr;
 824         m = n % thread_nr;
 825         for (i = 0; i < thread_nr; i++) {
 826                 args[i].tool = tool;
 827                 args[i].process = process;
 828                 args[i].machine = machine;
 829                 args[i].mmap_data = mmap_data;
 830                 args[i].proc_map_timeout = proc_map_timeout;
 831                 args[i].dirent = dirent;
 832         }
 833         for (i = 0; i < m; i++) {
 834                 args[i].num = num_per_thread + 1;
 835                 args[i].start = i * args[i].num;
 836         }
 837         if (i != 0)
 838                 base = args[i-1].start + args[i-1].num;
 839         for (j = i; j < thread_nr; j++) {
 840                 args[j].num = num_per_thread;
 841                 args[j].start = base + (j - i) * args[i].num;
 842         }
 843
 844         for (i = 0; i < thread_nr; i++) {
 845                 if (pthread_create(&synthesize_threads[i], NULL,
 846                                    synthesize_threads_worker, &args[i]))
 847                         goto out_join;
 848         }
 849         err = 0;
 850 out_join:
 851         for (i = 0; i < thread_nr; i++)
 852                 pthread_join(synthesize_threads[i], NULL);
 853         free(args);
 854 free_threads:
 855         free(synthesize_threads);
 856 free_dirent:
 857         for (i = 0; i < n; i++)
 858                 free(dirent[i]);
 859         free(dirent);
 860
 861         return err;
 862 }
 863
 864 struct process_symbol_args {
 865         const char *name;
 866         u64        start;
 867 };
 868
 869 static int find_symbol_cb(void *arg, const char *name, char type,
 870                           u64 start)
 871 {
 872         struct process_symbol_args *args = arg;
 873
 874         /*
 875          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 876          * an 'A' to the same address as "_stext".
 877          */
 878         if (!(kallsyms__is_function(type) ||
 879               type == 'A') || strcmp(name, args->name))
 880                 return 0;
 881
 882         args->start = start;
 883         return 1;
 884 }
 885
 886 int kallsyms__get_function_start(const char *kallsyms_filename,
 887                                  const char *symbol_name, u64 *addr)
 888 {
 889         struct process_symbol_args args = { .name = symbol_name, };
 890
 891         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 892                 return -1;
 893
 894         *addr = args.start;
 895         return 0;
 896 }
 897
 898 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
 899                                               perf_event__handler_t process __maybe_unused,
 900                                               struct machine *machine __maybe_unused)
 901 {
 902         return 0;
 903 }
 904
 905 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 906                                                 perf_event__handler_t process,
 907                                                 struct machine *machine)
 908 {
 909         size_t size;
 910         struct map *map = machine__kernel_map(machine);
 911         struct kmap *kmap;
 912         int err;
 913         union perf_event *event;
 914
 915         if (symbol_conf.kptr_restrict)
 916                 return -1;
 917         if (map == NULL)
 918                 return -1;
 919
 920         /*
 921          * We should get this from /sys/kernel/sections/.text, but till that is
 922          * available use this, and after it is use this as a fallback for older
 923          * kernels.
 924          */
 925         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 926         if (event == NULL) {
 927                 pr_debug("Not enough memory synthesizing mmap event "
 928                          "for kernel modules\n");
 929                 return -1;
 930         }
 931
 932         if (machine__is_host(machine)) {
 933                 /*
 934                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 935                  * see kernel/perf_event.c __perf_event_mmap
 936                  */
 937                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 938         } else {
 939                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 940         }
 941
 942         kmap = map__kmap(map);
 943         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 944                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 945         size = PERF_ALIGN(size, sizeof(u64));
 946         event->mmap.header.type = PERF_RECORD_MMAP;
 947         event->mmap.header.size = (sizeof(event->mmap) -
 948                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 949         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 950         event->mmap.start = map->start;
 951         event->mmap.len   = map->end - event->mmap.start;
 952         event->mmap.pid   = machine->pid;
 953
 954         err = perf_tool__process_synth_event(tool, event, machine, process);
 955         free(event);
 956
 957         return err;
 958 }
 959
 960 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 961                                        perf_event__handler_t process,
 962                                        struct machine *machine)
 963 {
 964         int err;
 965
 966         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
 967         if (err < 0)
 968                 return err;
 969
 970         return perf_event__synthesize_extra_kmaps(tool, process, machine);
 971 }
 972
 973 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 974                                       struct thread_map *threads,
 975                                       perf_event__handler_t process,
 976                                       struct machine *machine)
 977 {
 978         union perf_event *event;
 979         int i, err, size;
 980
 981         size  = sizeof(event->thread_map);
 982         size += threads->nr * sizeof(event->thread_map.entries[0]);
 983
 984         event = zalloc(size);
 985         if (!event)
 986                 return -ENOMEM;
 987
 988         event->header.type = PERF_RECORD_THREAD_MAP;
 989         event->header.size = size;
 990         event->thread_map.nr = threads->nr;
 991
 992         for (i = 0; i < threads->nr; i++) {
 993                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 994                 char *comm = thread_map__comm(threads, i);
 995
 996                 if (!comm)
 997                         comm = (char *) "";
 998
 999                 entry->pid = thread_map__pid(threads, i);
1000                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1001         }
1002
1003         err = process(tool, event, NULL, machine);
1004
1005         free(event);
1006         return err;
1007 }
1008
1009 static void synthesize_cpus(struct cpu_map_entries *cpus,
1010                             struct cpu_map *map)
1011 {
1012         int i;
1013
1014         cpus->nr = map->nr;
1015
1016         for (i = 0; i < map->nr; i++)
1017                 cpus->cpu[i] = map->map[i];
1018 }
1019
1020 static void synthesize_mask(struct cpu_map_mask *mask,
1021                             struct cpu_map *map, int max)
1022 {
1023         int i;
1024
1025         mask->nr = BITS_TO_LONGS(max);
1026         mask->long_size = sizeof(long);
1027
1028         for (i = 0; i < map->nr; i++)
1029                 set_bit(map->map[i], mask->mask);
1030 }
1031
1032 static size_t cpus_size(struct cpu_map *map)
1033 {
1034         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1035 }
1036
1037 static size_t mask_size(struct cpu_map *map, int *max)
1038 {
1039         int i;
1040
1041         *max = 0;
1042
1043         for (i = 0; i < map->nr; i++) {
1044                 /* bit possition of the cpu is + 1 */
1045                 int bit = map->map[i] + 1;
1046
1047                 if (bit > *max)
1048                         *max = bit;
1049         }
1050
1051         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1052 }
1053
1054 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1055 {
1056         size_t size_cpus, size_mask;
1057         bool is_dummy = cpu_map__empty(map);
1058
1059         /*
1060          * Both array and mask data have variable size based
1061          * on the number of cpus and their actual values.
1062          * The size of the 'struct cpu_map_data' is:
1063          *
1064          *   array = size of 'struct cpu_map_entries' +
1065          *           number of cpus * sizeof(u64)
1066          *
1067          *   mask  = size of 'struct cpu_map_mask' +
1068          *           maximum cpu bit converted to size of longs
1069          *
1070          * and finaly + the size of 'struct cpu_map_data'.
1071          */
1072         size_cpus = cpus_size(map);
1073         size_mask = mask_size(map, max);
1074
1075         if (is_dummy || (size_cpus < size_mask)) {
1076                 *size += size_cpus;
1077                 *type  = PERF_CPU_MAP__CPUS;
1078         } else {
1079                 *size += size_mask;
1080                 *type  = PERF_CPU_MAP__MASK;
1081         }
1082
1083         *size += sizeof(struct cpu_map_data);
1084         return zalloc(*size);
1085 }
1086
1087 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1088                               u16 type, int max)
1089 {
1090         data->type = type;
1091
1092         switch (type) {
1093         case PERF_CPU_MAP__CPUS:
1094                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1095                 break;
1096         case PERF_CPU_MAP__MASK:
1097                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1098         default:
1099                 break;
1100         };
1101 }
1102
1103 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1104 {
1105         size_t size = sizeof(struct cpu_map_event);
1106         struct cpu_map_event *event;
1107         int max;
1108         u16 type;
1109
1110         event = cpu_map_data__alloc(map, &size, &type, &max);
1111         if (!event)
1112                 return NULL;
1113
1114         event->header.type = PERF_RECORD_CPU_MAP;
1115         event->header.size = size;
1116         event->data.type   = type;
1117
1118         cpu_map_data__synthesize(&event->data, map, type, max);
1119         return event;
1120 }
1121
1122 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1123                                    struct cpu_map *map,
1124                                    perf_event__handler_t process,
1125                                    struct machine *machine)
1126 {
1127         struct cpu_map_event *event;
1128         int err;
1129
1130         event = cpu_map_event__new(map);
1131         if (!event)
1132                 return -ENOMEM;
1133
1134         err = process(tool, (union perf_event *) event, NULL, machine);
1135
1136         free(event);
1137         return err;
1138 }
1139
1140 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1141                                        struct perf_stat_config *config,
1142                                        perf_event__handler_t process,
1143                                        struct machine *machine)
1144 {
1145         struct stat_config_event *event;
1146         int size, i = 0, err;
1147
1148         size  = sizeof(*event);
1149         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1150
1151         event = zalloc(size);
1152         if (!event)
1153                 return -ENOMEM;
1154
1155         event->header.type = PERF_RECORD_STAT_CONFIG;
1156         event->header.size = size;
1157         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1158
1159 #define ADD(__term, __val)                                      \
1160         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1161         event->data[i].val = __val;                             \
1162         i++;
1163
1164         ADD(AGGR_MODE,  config->aggr_mode)
1165         ADD(INTERVAL,   config->interval)
1166         ADD(SCALE,      config->scale)
1167
1168         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1169                   "stat config terms unbalanced\n");
1170 #undef ADD
1171
1172         err = process(tool, (union perf_event *) event, NULL, machine);
1173
1174         free(event);
1175         return err;
1176 }
1177
1178 int perf_event__synthesize_stat(struct perf_tool *tool,
1179                                 u32 cpu, u32 thread, u64 id,
1180                                 struct perf_counts_values *count,
1181                                 perf_event__handler_t process,
1182                                 struct machine *machine)
1183 {
1184         struct stat_event event;
1185
1186         event.header.type = PERF_RECORD_STAT;
1187         event.header.size = sizeof(event);
1188         event.header.misc = 0;
1189
1190         event.id        = id;
1191         event.cpu       = cpu;
1192         event.thread    = thread;
1193         event.val       = count->val;
1194         event.ena       = count->ena;
1195         event.run       = count->run;
1196
1197         return process(tool, (union perf_event *) &event, NULL, machine);
1198 }
1199
1200 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1201                                       u64 evtime, u64 type,
1202                                       perf_event__handler_t process,
1203                                       struct machine *machine)
1204 {
1205         struct stat_round_event event;
1206
1207         event.header.type = PERF_RECORD_STAT_ROUND;
1208         event.header.size = sizeof(event);
1209         event.header.misc = 0;
1210
1211         event.time = evtime;
1212         event.type = type;
1213
1214         return process(tool, (union perf_event *) &event, NULL, machine);
1215 }
1216
1217 void perf_event__read_stat_config(struct perf_stat_config *config,
1218                                   struct stat_config_event *event)
1219 {
1220         unsigned i;
1221
1222         for (i = 0; i < event->nr; i++) {
1223
1224                 switch (event->data[i].tag) {
1225 #define CASE(__term, __val)                                     \
1226                 case PERF_STAT_CONFIG_TERM__##__term:           \
1227                         config->__val = event->data[i].val;     \
1228                         break;
1229
1230                 CASE(AGGR_MODE, aggr_mode)
1231                 CASE(SCALE,     scale)
1232                 CASE(INTERVAL,  interval)
1233 #undef CASE
1234                 default:
1235                         pr_warning("unknown stat config term %" PRIu64 "\n",
1236                                    event->data[i].tag);
1237                 }
1238         }
1239 }
1240
1241 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1242 {
1243         const char *s;
1244
1245         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1246                 s = " exec";
1247         else
1248                 s = "";
1249
1250         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1251 }
1252
1253 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1254 {
1255         size_t ret = 0;
1256         struct perf_ns_link_info *ns_link_info;
1257         u32 nr_namespaces, idx;
1258
1259         ns_link_info = event->namespaces.link_info;
1260         nr_namespaces = event->namespaces.nr_namespaces;
1261
1262         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1263                        event->namespaces.pid,
1264                        event->namespaces.tid,
1265                        nr_namespaces);
1266
1267         for (idx = 0; idx < nr_namespaces; idx++) {
1268                 if (idx && (idx % 4 == 0))
1269                         ret += fprintf(fp, "\n\t\t ");
1270
1271                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1272                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1273                                 (u64)ns_link_info[idx].ino,
1274                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1275         }
1276
1277         return ret;
1278 }
1279
1280 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1281                              union perf_event *event,
1282                              struct perf_sample *sample,
1283                              struct machine *machine)
1284 {
1285         return machine__process_comm_event(machine, event, sample);
1286 }
1287
1288 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1289                                    union perf_event *event,
1290                                    struct perf_sample *sample,
1291                                    struct machine *machine)
1292 {
1293         return machine__process_namespaces_event(machine, event, sample);
1294 }
1295
1296 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1297                              union perf_event *event,
1298                              struct perf_sample *sample,
1299                              struct machine *machine)
1300 {
1301         return machine__process_lost_event(machine, event, sample);
1302 }
1303
1304 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1305                             union perf_event *event,
1306                             struct perf_sample *sample __maybe_unused,
1307                             struct machine *machine)
1308 {
1309         return machine__process_aux_event(machine, event);
1310 }
1311
1312 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1313                                      union perf_event *event,
1314                                      struct perf_sample *sample __maybe_unused,
1315                                      struct machine *machine)
1316 {
1317         return machine__process_itrace_start_event(machine, event);
1318 }
1319
1320 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1321                                      union perf_event *event,
1322                                      struct perf_sample *sample,
1323                                      struct machine *machine)
1324 {
1325         return machine__process_lost_samples_event(machine, event, sample);
1326 }
1327
1328 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1329                                union perf_event *event,
1330                                struct perf_sample *sample __maybe_unused,
1331                                struct machine *machine)
1332 {
1333         return machine__process_switch_event(machine, event);
1334 }
1335
1336 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1337 {
1338         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1339                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1340                        event->mmap.len, event->mmap.pgoff,
1341                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1342                        event->mmap.filename);
1343 }
1344
1345 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1346 {
1347         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1348                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1349                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1350                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1351                        event->mmap2.min, event->mmap2.ino,
1352                        event->mmap2.ino_generation,
1353                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1354                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1355                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1356                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1357                        event->mmap2.filename);
1358 }
1359
1360 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1361 {
1362         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1363         size_t ret;
1364
1365         ret = fprintf(fp, " nr: ");
1366
1367         if (threads)
1368                 ret += thread_map__fprintf(threads, fp);
1369         else
1370                 ret += fprintf(fp, "failed to get threads from event\n");
1371
1372         thread_map__put(threads);
1373         return ret;
1374 }
1375
1376 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1377 {
1378         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1379         size_t ret;
1380
1381         ret = fprintf(fp, ": ");
1382
1383         if (cpus)
1384                 ret += cpu_map__fprintf(cpus, fp);
1385         else
1386                 ret += fprintf(fp, "failed to get cpumap from event\n");
1387
1388         cpu_map__put(cpus);
1389         return ret;
1390 }
1391
1392 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1393                              union perf_event *event,
1394                              struct perf_sample *sample,
1395                              struct machine *machine)
1396 {
1397         return machine__process_mmap_event(machine, event, sample);
1398 }
1399
1400 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1401                              union perf_event *event,
1402                              struct perf_sample *sample,
1403                              struct machine *machine)
1404 {
1405         return machine__process_mmap2_event(machine, event, sample);
1406 }
1407
1408 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1409 {
1410         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1411                        event->fork.pid, event->fork.tid,
1412                        event->fork.ppid, event->fork.ptid);
1413 }
1414
1415 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1416                              union perf_event *event,
1417                              struct perf_sample *sample,
1418                              struct machine *machine)
1419 {
1420         return machine__process_fork_event(machine, event, sample);
1421 }
1422
1423 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1424                              union perf_event *event,
1425                              struct perf_sample *sample,
1426                              struct machine *machine)
1427 {
1428         return machine__process_exit_event(machine, event, sample);
1429 }
1430
1431 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1432 {
1433         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1434                        event->aux.aux_offset, event->aux.aux_size,
1435                        event->aux.flags,
1436                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1437                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1438                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1439 }
1440
1441 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1442 {
1443         return fprintf(fp, " pid: %u tid: %u\n",
1444                        event->itrace_start.pid, event->itrace_start.tid);
1445 }
1446
1447 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1448 {
1449         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1450         const char *in_out = !out ? "IN         " :
1451                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1452                                     "OUT        " : "OUT preempt";
1453
1454         if (event->header.type == PERF_RECORD_SWITCH)
1455                 return fprintf(fp, " %s\n", in_out);
1456
1457         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1458                        in_out, out ? "next" : "prev",
1459                        event->context_switch.next_prev_pid,
1460                        event->context_switch.next_prev_tid);
1461 }
1462
1463 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1464 {
1465         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1466 }
1467
1468 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1469 {
1470         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1471                              perf_event__name(event->header.type));
1472
1473         switch (event->header.type) {
1474         case PERF_RECORD_COMM:
1475                 ret += perf_event__fprintf_comm(event, fp);
1476                 break;
1477         case PERF_RECORD_FORK:
1478         case PERF_RECORD_EXIT:
1479                 ret += perf_event__fprintf_task(event, fp);
1480                 break;
1481         case PERF_RECORD_MMAP:
1482                 ret += perf_event__fprintf_mmap(event, fp);
1483                 break;
1484         case PERF_RECORD_NAMESPACES:
1485                 ret += perf_event__fprintf_namespaces(event, fp);
1486                 break;
1487         case PERF_RECORD_MMAP2:
1488                 ret += perf_event__fprintf_mmap2(event, fp);
1489                 break;
1490         case PERF_RECORD_AUX:
1491                 ret += perf_event__fprintf_aux(event, fp);
1492                 break;
1493         case PERF_RECORD_ITRACE_START:
1494                 ret += perf_event__fprintf_itrace_start(event, fp);
1495                 break;
1496         case PERF_RECORD_SWITCH:
1497         case PERF_RECORD_SWITCH_CPU_WIDE:
1498                 ret += perf_event__fprintf_switch(event, fp);
1499                 break;
1500         case PERF_RECORD_LOST:
1501                 ret += perf_event__fprintf_lost(event, fp);
1502                 break;
1503         default:
1504                 ret += fprintf(fp, "\n");
1505         }
1506
1507         return ret;
1508 }
1509
1510 int perf_event__process(struct perf_tool *tool __maybe_unused,
1511                         union perf_event *event,
1512                         struct perf_sample *sample,
1513                         struct machine *machine)
1514 {
1515         return machine__process_event(machine, event, sample);
1516 }
1517
1518 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1519                              struct addr_location *al)
1520 {
1521         struct map_groups *mg = thread->mg;
1522         struct machine *machine = mg->machine;
1523         bool load_map = false;
1524
1525         al->machine = machine;
1526         al->thread = thread;
1527         al->addr = addr;
1528         al->cpumode = cpumode;
1529         al->filtered = 0;
1530
1531         if (machine == NULL) {
1532                 al->map = NULL;
1533                 return NULL;
1534         }
1535
1536         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1537                 al->level = 'k';
1538                 mg = &machine->kmaps;
1539                 load_map = true;
1540         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1541                 al->level = '.';
1542         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1543                 al->level = 'g';
1544                 mg = &machine->kmaps;
1545                 load_map = true;
1546         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1547                 al->level = 'u';
1548         } else {
1549                 al->level = 'H';
1550                 al->map = NULL;
1551
1552                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1553                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1554                         !perf_guest)
1555                         al->filtered |= (1 << HIST_FILTER__GUEST);
1556                 if ((cpumode == PERF_RECORD_MISC_USER ||
1557                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1558                         !perf_host)
1559                         al->filtered |= (1 << HIST_FILTER__HOST);
1560
1561                 return NULL;
1562         }
1563 try_again:
1564         al->map = map_groups__find(mg, al->addr);
1565         if (al->map == NULL) {
1566                 /*
1567                  * If this is outside of all known maps, and is a negative
1568                  * address, try to look it up in the kernel dso, as it might be
1569                  * a vsyscall or vdso (which executes in user-mode).
1570                  *
1571                  * XXX This is nasty, we should have a symbol list in the
1572                  * "[vdso]" dso, but for now lets use the old trick of looking
1573                  * in the whole kernel symbol list.
1574                  */
1575                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1576                     mg != &machine->kmaps &&
1577                     machine__kernel_ip(machine, al->addr)) {
1578                         mg = &machine->kmaps;
1579                         load_map = true;
1580                         goto try_again;
1581                 }
1582         } else {
1583                 /*
1584                  * Kernel maps might be changed when loading symbols so loading
1585                  * must be done prior to using kernel maps.
1586                  */
1587                 if (load_map)
1588                         map__load(al->map);
1589                 al->addr = al->map->map_ip(al->map, al->addr);
1590         }
1591
1592         return al->map;
1593 }
1594
1595 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1596                                    u64 addr, struct addr_location *al)
1597 {
1598         al->sym = NULL;
1599         if (thread__find_map(thread, cpumode, addr, al))
1600                 al->sym = map__find_symbol(al->map, al->addr);
1601         return al->sym;
1602 }
1603
1604 /*
1605  * Callers need to drop the reference to al->thread, obtained in
1606  * machine__findnew_thread()
1607  */
1608 int machine__resolve(struct machine *machine, struct addr_location *al,
1609                      struct perf_sample *sample)
1610 {
1611         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1612                                                         sample->tid);
1613
1614         if (thread == NULL)
1615                 return -1;
1616
1617         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1618         thread__find_map(thread, sample->cpumode, sample->ip, al);
1619         dump_printf(" ...... dso: %s\n",
1620                     al->map ? al->map->dso->long_name :
1621                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1622
1623         if (thread__is_filtered(thread))
1624                 al->filtered |= (1 << HIST_FILTER__THREAD);
1625
1626         al->sym = NULL;
1627         al->cpu = sample->cpu;
1628         al->socket = -1;
1629         al->srcline = NULL;
1630
1631         if (al->cpu >= 0) {
1632                 struct perf_env *env = machine->env;
1633
1634                 if (env && env->cpu)
1635                         al->socket = env->cpu[al->cpu].socket_id;
1636         }
1637
1638         if (al->map) {
1639                 struct dso *dso = al->map->dso;
1640
1641                 if (symbol_conf.dso_list &&
1642                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1643                                                   dso->short_name) ||
1644                                (dso->short_name != dso->long_name &&
1645                                 strlist__has_entry(symbol_conf.dso_list,
1646                                                    dso->long_name))))) {
1647                         al->filtered |= (1 << HIST_FILTER__DSO);
1648                 }
1649
1650                 al->sym = map__find_symbol(al->map, al->addr);
1651         }
1652
1653         if (symbol_conf.sym_list &&
1654                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1655                                                 al->sym->name))) {
1656                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1657         }
1658
1659         return 0;
1660 }
1661
1662 /*
1663  * The preprocess_sample method will return with reference counts for the
1664  * in it, when done using (and perhaps getting ref counts if needing to
1665  * keep a pointer to one of those entries) it must be paired with
1666  * addr_location__put(), so that the refcounts can be decremented.
1667  */
1668 void addr_location__put(struct addr_location *al)
1669 {
1670         thread__zput(al->thread);
1671 }
1672
1673 bool is_bts_event(struct perf_event_attr *attr)
1674 {
1675         return attr->type == PERF_TYPE_HARDWARE &&
1676                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1677                attr->sample_period == 1;
1678 }
1679
1680 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1681 {
1682         if (attr->type == PERF_TYPE_SOFTWARE &&
1683             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1684              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1685              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1686                 return true;
1687
1688         if (is_bts_event(attr))
1689                 return true;
1690
1691         return false;
1692 }
1693
1694 void thread__resolve(struct thread *thread, struct addr_location *al,
1695                      struct perf_sample *sample)
1696 {
1697         thread__find_map(thread, sample->cpumode, sample->addr, al);
1698
1699         al->cpu = sample->cpu;
1700         al->sym = NULL;
1701
1702         if (al->map)
1703                 al->sym = map__find_symbol(al->map, al->addr);
1704 }