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 <linux/ctype.h>
  24 #include "map.h"
  25 #include "symbol.h"
  26 #include "symbol/kallsyms.h"
  27 #include "asm/bug.h"
  28 #include "stat.h"
  29 #include "session.h"
  30 #include "bpf-event.h"
  31
  32 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
  33
  34 static const char *perf_event__names[] = {
  35         [0]                                     = "TOTAL",
  36         [PERF_RECORD_MMAP]                      = "MMAP",
  37         [PERF_RECORD_MMAP2]                     = "MMAP2",
  38         [PERF_RECORD_LOST]                      = "LOST",
  39         [PERF_RECORD_COMM]                      = "COMM",
  40         [PERF_RECORD_EXIT]                      = "EXIT",
  41         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  42         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  43         [PERF_RECORD_FORK]                      = "FORK",
  44         [PERF_RECORD_READ]                      = "READ",
  45         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  46         [PERF_RECORD_AUX]                       = "AUX",
  47         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  48         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  49         [PERF_RECORD_SWITCH]                    = "SWITCH",
  50         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  51         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  52         [PERF_RECORD_KSYMBOL]                   = "KSYMBOL",
  53         [PERF_RECORD_BPF_EVENT]                 = "BPF_EVENT",
  54         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  55         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  56         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  57         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  58         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  59         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  60         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  61         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  62         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  63         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  64         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  65         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  66         [PERF_RECORD_STAT]                      = "STAT",
  67         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  68         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  69         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  70         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  71         [PERF_RECORD_COMPRESSED]                = "COMPRESSED",
  72 };
  73
  74 static const char *perf_ns__names[] = {
  75         [NET_NS_INDEX]          = "net",
  76         [UTS_NS_INDEX]          = "uts",
  77         [IPC_NS_INDEX]          = "ipc",
  78         [PID_NS_INDEX]          = "pid",
  79         [USER_NS_INDEX]         = "user",
  80         [MNT_NS_INDEX]          = "mnt",
  81         [CGROUP_NS_INDEX]       = "cgroup",
  82 };
  83
  84 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
  85
  86 const char *perf_event__name(unsigned int id)
  87 {
  88         if (id >= ARRAY_SIZE(perf_event__names))
  89                 return "INVALID";
  90         if (!perf_event__names[id])
  91                 return "UNKNOWN";
  92         return perf_event__names[id];
  93 }
  94
  95 static const char *perf_ns__name(unsigned int id)
  96 {
  97         if (id >= ARRAY_SIZE(perf_ns__names))
  98                 return "UNKNOWN";
  99         return perf_ns__names[id];
 100 }
 101
 102 int perf_tool__process_synth_event(struct perf_tool *tool,
 103                                    union perf_event *event,
 104                                    struct machine *machine,
 105                                    perf_event__handler_t process)
 106 {
 107         struct perf_sample synth_sample = {
 108         .pid       = -1,
 109         .tid       = -1,
 110         .time      = -1,
 111         .stream_id = -1,
 112         .cpu       = -1,
 113         .period    = 1,
 114         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 115         };
 116
 117         return process(tool, event, &synth_sample, machine);
 118 };
 119
 120 /*
 121  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 122  * the comm, tgid and ppid.
 123  */
 124 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 125                                     pid_t *tgid, pid_t *ppid)
 126 {
 127         char filename[PATH_MAX];
 128         char bf[4096];
 129         int fd;
 130         size_t size = 0;
 131         ssize_t n;
 132         char *name, *tgids, *ppids;
 133
 134         *tgid = -1;
 135         *ppid = -1;
 136
 137         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 138
 139         fd = open(filename, O_RDONLY);
 140         if (fd < 0) {
 141                 pr_debug("couldn't open %s\n", filename);
 142                 return -1;
 143         }
 144
 145         n = read(fd, bf, sizeof(bf) - 1);
 146         close(fd);
 147         if (n <= 0) {
 148                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 149                            pid);
 150                 return -1;
 151         }
 152         bf[n] = '\0';
 153
 154         name = strstr(bf, "Name:");
 155         tgids = strstr(bf, "Tgid:");
 156         ppids = strstr(bf, "PPid:");
 157
 158         if (name) {
 159                 char *nl;
 160
 161                 name = skip_spaces(name + 5);  /* strlen("Name:") */
 162                 nl = strchr(name, '\n');
 163                 if (nl)
 164                         *nl = '\0';
 165
 166                 size = strlen(name);
 167                 if (size >= len)
 168                         size = len - 1;
 169                 memcpy(comm, name, size);
 170                 comm[size] = '\0';
 171         } else {
 172                 pr_debug("Name: string not found for pid %d\n", pid);
 173         }
 174
 175         if (tgids) {
 176                 tgids += 5;  /* strlen("Tgid:") */
 177                 *tgid = atoi(tgids);
 178         } else {
 179                 pr_debug("Tgid: string not found for pid %d\n", pid);
 180         }
 181
 182         if (ppids) {
 183                 ppids += 5;  /* strlen("PPid:") */
 184                 *ppid = atoi(ppids);
 185         } else {
 186                 pr_debug("PPid: string not found for pid %d\n", pid);
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 193                                     struct machine *machine,
 194                                     pid_t *tgid, pid_t *ppid)
 195 {
 196         size_t size;
 197
 198         *ppid = -1;
 199
 200         memset(&event->comm, 0, sizeof(event->comm));
 201
 202         if (machine__is_host(machine)) {
 203                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 204                                              sizeof(event->comm.comm),
 205                                              tgid, ppid) != 0) {
 206                         return -1;
 207                 }
 208         } else {
 209                 *tgid = machine->pid;
 210         }
 211
 212         if (*tgid < 0)
 213                 return -1;
 214
 215         event->comm.pid = *tgid;
 216         event->comm.header.type = PERF_RECORD_COMM;
 217
 218         size = strlen(event->comm.comm) + 1;
 219         size = PERF_ALIGN(size, sizeof(u64));
 220         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 221         event->comm.header.size = (sizeof(event->comm) -
 222                                 (sizeof(event->comm.comm) - size) +
 223                                 machine->id_hdr_size);
 224         event->comm.tid = pid;
 225
 226         return 0;
 227 }
 228
 229 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 230                                          union perf_event *event, pid_t pid,
 231                                          perf_event__handler_t process,
 232                                          struct machine *machine)
 233 {
 234         pid_t tgid, ppid;
 235
 236         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 237                 return -1;
 238
 239         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 240                 return -1;
 241
 242         return tgid;
 243 }
 244
 245 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 246                                          struct perf_ns_link_info *ns_link_info)
 247 {
 248         struct stat64 st;
 249         char proc_ns[128];
 250
 251         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 252         if (stat64(proc_ns, &st) == 0) {
 253                 ns_link_info->dev = st.st_dev;
 254                 ns_link_info->ino = st.st_ino;
 255         }
 256 }
 257
 258 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 259                                       union perf_event *event,
 260                                       pid_t pid, pid_t tgid,
 261                                       perf_event__handler_t process,
 262                                       struct machine *machine)
 263 {
 264         u32 idx;
 265         struct perf_ns_link_info *ns_link_info;
 266
 267         if (!tool || !tool->namespace_events)
 268                 return 0;
 269
 270         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 271                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 272                machine->id_hdr_size));
 273
 274         event->namespaces.pid = tgid;
 275         event->namespaces.tid = pid;
 276
 277         event->namespaces.nr_namespaces = NR_NAMESPACES;
 278
 279         ns_link_info = event->namespaces.link_info;
 280
 281         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 282                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 283                                              &ns_link_info[idx]);
 284
 285         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 286
 287         event->namespaces.header.size = (sizeof(event->namespaces) +
 288                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 289                         machine->id_hdr_size);
 290
 291         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 292                 return -1;
 293
 294         return 0;
 295 }
 296
 297 static int perf_event__synthesize_fork(struct perf_tool *tool,
 298                                        union perf_event *event,
 299                                        pid_t pid, pid_t tgid, pid_t ppid,
 300                                        perf_event__handler_t process,
 301                                        struct machine *machine)
 302 {
 303         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 304
 305         /*
 306          * for main thread set parent to ppid from status file. For other
 307          * threads set parent pid to main thread. ie., assume main thread
 308          * spawns all threads in a process
 309         */
 310         if (tgid == pid) {
 311                 event->fork.ppid = ppid;
 312                 event->fork.ptid = ppid;
 313         } else {
 314                 event->fork.ppid = tgid;
 315                 event->fork.ptid = tgid;
 316         }
 317         event->fork.pid  = tgid;
 318         event->fork.tid  = pid;
 319         event->fork.header.type = PERF_RECORD_FORK;
 320         event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 321
 322         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 323
 324         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 325                 return -1;
 326
 327         return 0;
 328 }
 329
 330 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 331                                        union perf_event *event,
 332                                        pid_t pid, pid_t tgid,
 333                                        perf_event__handler_t process,
 334                                        struct machine *machine,
 335                                        bool mmap_data)
 336 {
 337         char filename[PATH_MAX];
 338         FILE *fp;
 339         unsigned long long t;
 340         bool truncation = false;
 341         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 342         int rc = 0;
 343         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 344         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 345
 346         if (machine__is_default_guest(machine))
 347                 return 0;
 348
 349         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 350                  machine->root_dir, pid, pid);
 351
 352         fp = fopen(filename, "r");
 353         if (fp == NULL) {
 354                 /*
 355                  * We raced with a task exiting - just return:
 356                  */
 357                 pr_debug("couldn't open %s\n", filename);
 358                 return -1;
 359         }
 360
 361         event->header.type = PERF_RECORD_MMAP2;
 362         t = rdclock();
 363
 364         while (1) {
 365                 char bf[BUFSIZ];
 366                 char prot[5];
 367                 char execname[PATH_MAX];
 368                 char anonstr[] = "//anon";
 369                 unsigned int ino;
 370                 size_t size;
 371                 ssize_t n;
 372
 373                 if (fgets(bf, sizeof(bf), fp) == NULL)
 374                         break;
 375
 376                 if ((rdclock() - t) > timeout) {
 377                         pr_warning("Reading %s time out. "
 378                                    "You may want to increase "
 379                                    "the time limit by --proc-map-timeout\n",
 380                                    filename);
 381                         truncation = true;
 382                         goto out;
 383                 }
 384
 385                 /* ensure null termination since stack will be reused. */
 386                 strcpy(execname, "");
 387
 388                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 389                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 390                        &event->mmap2.start, &event->mmap2.len, prot,
 391                        &event->mmap2.pgoff, &event->mmap2.maj,
 392                        &event->mmap2.min,
 393                        &ino, execname);
 394
 395                 /*
 396                  * Anon maps don't have the execname.
 397                  */
 398                 if (n < 7)
 399                         continue;
 400
 401                 event->mmap2.ino = (u64)ino;
 402
 403                 /*
 404                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 405                  */
 406                 if (machine__is_host(machine))
 407                         event->header.misc = PERF_RECORD_MISC_USER;
 408                 else
 409                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 410
 411                 /* map protection and flags bits */
 412                 event->mmap2.prot = 0;
 413                 event->mmap2.flags = 0;
 414                 if (prot[0] == 'r')
 415                         event->mmap2.prot |= PROT_READ;
 416                 if (prot[1] == 'w')
 417                         event->mmap2.prot |= PROT_WRITE;
 418                 if (prot[2] == 'x')
 419                         event->mmap2.prot |= PROT_EXEC;
 420
 421                 if (prot[3] == 's')
 422                         event->mmap2.flags |= MAP_SHARED;
 423                 else
 424                         event->mmap2.flags |= MAP_PRIVATE;
 425
 426                 if (prot[2] != 'x') {
 427                         if (!mmap_data || prot[0] != 'r')
 428                                 continue;
 429
 430                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 431                 }
 432
 433 out:
 434                 if (truncation)
 435                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 436
 437                 if (!strcmp(execname, ""))
 438                         strcpy(execname, anonstr);
 439
 440                 if (hugetlbfs_mnt_len &&
 441                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 442                         strcpy(execname, anonstr);
 443                         event->mmap2.flags |= MAP_HUGETLB;
 444                 }
 445
 446                 size = strlen(execname) + 1;
 447                 memcpy(event->mmap2.filename, execname, size);
 448                 size = PERF_ALIGN(size, sizeof(u64));
 449                 event->mmap2.len -= event->mmap.start;
 450                 event->mmap2.header.size = (sizeof(event->mmap2) -
 451                                         (sizeof(event->mmap2.filename) - size));
 452                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 453                 event->mmap2.header.size += machine->id_hdr_size;
 454                 event->mmap2.pid = tgid;
 455                 event->mmap2.tid = pid;
 456
 457                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 458                         rc = -1;
 459                         break;
 460                 }
 461
 462                 if (truncation)
 463                         break;
 464         }
 465
 466         fclose(fp);
 467         return rc;
 468 }
 469
 470 int perf_event__synthesize_modules(struct perf_tool *tool,
 471                                    perf_event__handler_t process,
 472                                    struct machine *machine)
 473 {
 474         int rc = 0;
 475         struct map *pos;
 476         struct maps *maps = machine__kernel_maps(machine);
 477         union perf_event *event = zalloc((sizeof(event->mmap) +
 478                                           machine->id_hdr_size));
 479         if (event == NULL) {
 480                 pr_debug("Not enough memory synthesizing mmap event "
 481                          "for kernel modules\n");
 482                 return -1;
 483         }
 484
 485         event->header.type = PERF_RECORD_MMAP;
 486
 487         /*
 488          * kernel uses 0 for user space maps, see kernel/perf_event.c
 489          * __perf_event_mmap
 490          */
 491         if (machine__is_host(machine))
 492                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 493         else
 494                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 495
 496         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 497                 size_t size;
 498
 499                 if (!__map__is_kmodule(pos))
 500                         continue;
 501
 502                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 503                 event->mmap.header.type = PERF_RECORD_MMAP;
 504                 event->mmap.header.size = (sizeof(event->mmap) -
 505                                         (sizeof(event->mmap.filename) - size));
 506                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 507                 event->mmap.header.size += machine->id_hdr_size;
 508                 event->mmap.start = pos->start;
 509                 event->mmap.len   = pos->end - pos->start;
 510                 event->mmap.pid   = machine->pid;
 511
 512                 memcpy(event->mmap.filename, pos->dso->long_name,
 513                        pos->dso->long_name_len + 1);
 514                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 515                         rc = -1;
 516                         break;
 517                 }
 518         }
 519
 520         free(event);
 521         return rc;
 522 }
 523
 524 static int __event__synthesize_thread(union perf_event *comm_event,
 525                                       union perf_event *mmap_event,
 526                                       union perf_event *fork_event,
 527                                       union perf_event *namespaces_event,
 528                                       pid_t pid, int full,
 529                                       perf_event__handler_t process,
 530                                       struct perf_tool *tool,
 531                                       struct machine *machine,
 532                                       bool mmap_data)
 533 {
 534         char filename[PATH_MAX];
 535         DIR *tasks;
 536         struct dirent *dirent;
 537         pid_t tgid, ppid;
 538         int rc = 0;
 539
 540         /* special case: only send one comm event using passed in pid */
 541         if (!full) {
 542                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 543                                                    process, machine);
 544
 545                 if (tgid == -1)
 546                         return -1;
 547
 548                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 549                                                       tgid, process, machine) < 0)
 550                         return -1;
 551
 552                 /*
 553                  * send mmap only for thread group leader
 554                  * see thread__init_map_groups
 555                  */
 556                 if (pid == tgid &&
 557                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 558                                                        process, machine, mmap_data))
 559                         return -1;
 560
 561                 return 0;
 562         }
 563
 564         if (machine__is_default_guest(machine))
 565                 return 0;
 566
 567         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 568                  machine->root_dir, pid);
 569
 570         tasks = opendir(filename);
 571         if (tasks == NULL) {
 572                 pr_debug("couldn't open %s\n", filename);
 573                 return 0;
 574         }
 575
 576         while ((dirent = readdir(tasks)) != NULL) {
 577                 char *end;
 578                 pid_t _pid;
 579
 580                 _pid = strtol(dirent->d_name, &end, 10);
 581                 if (*end)
 582                         continue;
 583
 584                 rc = -1;
 585                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 586                                              &tgid, &ppid) != 0)
 587                         break;
 588
 589                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 590                                                 ppid, process, machine) < 0)
 591                         break;
 592
 593                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 594                                                       tgid, process, machine) < 0)
 595                         break;
 596
 597                 /*
 598                  * Send the prepared comm event
 599                  */
 600                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 601                         break;
 602
 603                 rc = 0;
 604                 if (_pid == pid) {
 605                         /* process the parent's maps too */
 606                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 607                                                 process, machine, mmap_data);
 608                         if (rc)
 609                                 break;
 610                 }
 611         }
 612
 613         closedir(tasks);
 614         return rc;
 615 }
 616
 617 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 618                                       struct thread_map *threads,
 619                                       perf_event__handler_t process,
 620                                       struct machine *machine,
 621                                       bool mmap_data)
 622 {
 623         union perf_event *comm_event, *mmap_event, *fork_event;
 624         union perf_event *namespaces_event;
 625         int err = -1, thread, j;
 626
 627         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 628         if (comm_event == NULL)
 629                 goto out;
 630
 631         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 632         if (mmap_event == NULL)
 633                 goto out_free_comm;
 634
 635         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 636         if (fork_event == NULL)
 637                 goto out_free_mmap;
 638
 639         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 640                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 641                                   machine->id_hdr_size);
 642         if (namespaces_event == NULL)
 643                 goto out_free_fork;
 644
 645         err = 0;
 646         for (thread = 0; thread < threads->nr; ++thread) {
 647                 if (__event__synthesize_thread(comm_event, mmap_event,
 648                                                fork_event, namespaces_event,
 649                                                thread_map__pid(threads, thread), 0,
 650                                                process, tool, machine,
 651                                                mmap_data)) {
 652                         err = -1;
 653                         break;
 654                 }
 655
 656                 /*
 657                  * comm.pid is set to thread group id by
 658                  * perf_event__synthesize_comm
 659                  */
 660                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 661                         bool need_leader = true;
 662
 663                         /* is thread group leader in thread_map? */
 664                         for (j = 0; j < threads->nr; ++j) {
 665                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 666                                         need_leader = false;
 667                                         break;
 668                                 }
 669                         }
 670
 671                         /* if not, generate events for it */
 672                         if (need_leader &&
 673                             __event__synthesize_thread(comm_event, mmap_event,
 674                                                        fork_event, namespaces_event,
 675                                                        comm_event->comm.pid, 0,
 676                                                        process, tool, machine,
 677                                                        mmap_data)) {
 678                                 err = -1;
 679                                 break;
 680                         }
 681                 }
 682         }
 683         free(namespaces_event);
 684 out_free_fork:
 685         free(fork_event);
 686 out_free_mmap:
 687         free(mmap_event);
 688 out_free_comm:
 689         free(comm_event);
 690 out:
 691         return err;
 692 }
 693
 694 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 695                                             perf_event__handler_t process,
 696                                             struct machine *machine,
 697                                             bool mmap_data,
 698                                             struct dirent **dirent,
 699                                             int start,
 700                                             int num)
 701 {
 702         union perf_event *comm_event, *mmap_event, *fork_event;
 703         union perf_event *namespaces_event;
 704         int err = -1;
 705         char *end;
 706         pid_t pid;
 707         int i;
 708
 709         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 710         if (comm_event == NULL)
 711                 goto out;
 712
 713         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 714         if (mmap_event == NULL)
 715                 goto out_free_comm;
 716
 717         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 718         if (fork_event == NULL)
 719                 goto out_free_mmap;
 720
 721         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 722                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 723                                   machine->id_hdr_size);
 724         if (namespaces_event == NULL)
 725                 goto out_free_fork;
 726
 727         for (i = start; i < start + num; i++) {
 728                 if (!isdigit(dirent[i]->d_name[0]))
 729                         continue;
 730
 731                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 732                 /* only interested in proper numerical dirents */
 733                 if (*end)
 734                         continue;
 735                 /*
 736                  * We may race with exiting thread, so don't stop just because
 737                  * one thread couldn't be synthesized.
 738                  */
 739                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 740                                            namespaces_event, pid, 1, process,
 741                                            tool, machine, mmap_data);
 742         }
 743         err = 0;
 744
 745         free(namespaces_event);
 746 out_free_fork:
 747         free(fork_event);
 748 out_free_mmap:
 749         free(mmap_event);
 750 out_free_comm:
 751         free(comm_event);
 752 out:
 753         return err;
 754 }
 755
 756 struct synthesize_threads_arg {
 757         struct perf_tool *tool;
 758         perf_event__handler_t process;
 759         struct machine *machine;
 760         bool mmap_data;
 761         struct dirent **dirent;
 762         int num;
 763         int start;
 764 };
 765
 766 static void *synthesize_threads_worker(void *arg)
 767 {
 768         struct synthesize_threads_arg *args = arg;
 769
 770         __perf_event__synthesize_threads(args->tool, args->process,
 771                                          args->machine, args->mmap_data,
 772                                          args->dirent,
 773                                          args->start, args->num);
 774         return NULL;
 775 }
 776
 777 int perf_event__synthesize_threads(struct perf_tool *tool,
 778                                    perf_event__handler_t process,
 779                                    struct machine *machine,
 780                                    bool mmap_data,
 781                                    unsigned int nr_threads_synthesize)
 782 {
 783         struct synthesize_threads_arg *args = NULL;
 784         pthread_t *synthesize_threads = NULL;
 785         char proc_path[PATH_MAX];
 786         struct dirent **dirent;
 787         int num_per_thread;
 788         int m, n, i, j;
 789         int thread_nr;
 790         int base = 0;
 791         int err = -1;
 792
 793
 794         if (machine__is_default_guest(machine))
 795                 return 0;
 796
 797         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 798         n = scandir(proc_path, &dirent, 0, alphasort);
 799         if (n < 0)
 800                 return err;
 801
 802         if (nr_threads_synthesize == UINT_MAX)
 803                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 804         else
 805                 thread_nr = nr_threads_synthesize;
 806
 807         if (thread_nr <= 1) {
 808                 err = __perf_event__synthesize_threads(tool, process,
 809                                                        machine, mmap_data,
 810                                                        dirent, base, n);
 811                 goto free_dirent;
 812         }
 813         if (thread_nr > n)
 814                 thread_nr = n;
 815
 816         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 817         if (synthesize_threads == NULL)
 818                 goto free_dirent;
 819
 820         args = calloc(sizeof(*args), thread_nr);
 821         if (args == NULL)
 822                 goto free_threads;
 823
 824         num_per_thread = n / thread_nr;
 825         m = n % thread_nr;
 826         for (i = 0; i < thread_nr; i++) {
 827                 args[i].tool = tool;
 828                 args[i].process = process;
 829                 args[i].machine = machine;
 830                 args[i].mmap_data = mmap_data;
 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         *size = PERF_ALIGN(*size, sizeof(u64));
1085         return zalloc(*size);
1086 }
1087
1088 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1089                               u16 type, int max)
1090 {
1091         data->type = type;
1092
1093         switch (type) {
1094         case PERF_CPU_MAP__CPUS:
1095                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1096                 break;
1097         case PERF_CPU_MAP__MASK:
1098                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1099         default:
1100                 break;
1101         };
1102 }
1103
1104 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1105 {
1106         size_t size = sizeof(struct cpu_map_event);
1107         struct cpu_map_event *event;
1108         int max;
1109         u16 type;
1110
1111         event = cpu_map_data__alloc(map, &size, &type, &max);
1112         if (!event)
1113                 return NULL;
1114
1115         event->header.type = PERF_RECORD_CPU_MAP;
1116         event->header.size = size;
1117         event->data.type   = type;
1118
1119         cpu_map_data__synthesize(&event->data, map, type, max);
1120         return event;
1121 }
1122
1123 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1124                                    struct cpu_map *map,
1125                                    perf_event__handler_t process,
1126                                    struct machine *machine)
1127 {
1128         struct cpu_map_event *event;
1129         int err;
1130
1131         event = cpu_map_event__new(map);
1132         if (!event)
1133                 return -ENOMEM;
1134
1135         err = process(tool, (union perf_event *) event, NULL, machine);
1136
1137         free(event);
1138         return err;
1139 }
1140
1141 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1142                                        struct perf_stat_config *config,
1143                                        perf_event__handler_t process,
1144                                        struct machine *machine)
1145 {
1146         struct stat_config_event *event;
1147         int size, i = 0, err;
1148
1149         size  = sizeof(*event);
1150         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1151
1152         event = zalloc(size);
1153         if (!event)
1154                 return -ENOMEM;
1155
1156         event->header.type = PERF_RECORD_STAT_CONFIG;
1157         event->header.size = size;
1158         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1159
1160 #define ADD(__term, __val)                                      \
1161         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1162         event->data[i].val = __val;                             \
1163         i++;
1164
1165         ADD(AGGR_MODE,  config->aggr_mode)
1166         ADD(INTERVAL,   config->interval)
1167         ADD(SCALE,      config->scale)
1168
1169         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1170                   "stat config terms unbalanced\n");
1171 #undef ADD
1172
1173         err = process(tool, (union perf_event *) event, NULL, machine);
1174
1175         free(event);
1176         return err;
1177 }
1178
1179 int perf_event__synthesize_stat(struct perf_tool *tool,
1180                                 u32 cpu, u32 thread, u64 id,
1181                                 struct perf_counts_values *count,
1182                                 perf_event__handler_t process,
1183                                 struct machine *machine)
1184 {
1185         struct stat_event event;
1186
1187         event.header.type = PERF_RECORD_STAT;
1188         event.header.size = sizeof(event);
1189         event.header.misc = 0;
1190
1191         event.id        = id;
1192         event.cpu       = cpu;
1193         event.thread    = thread;
1194         event.val       = count->val;
1195         event.ena       = count->ena;
1196         event.run       = count->run;
1197
1198         return process(tool, (union perf_event *) &event, NULL, machine);
1199 }
1200
1201 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1202                                       u64 evtime, u64 type,
1203                                       perf_event__handler_t process,
1204                                       struct machine *machine)
1205 {
1206         struct stat_round_event event;
1207
1208         event.header.type = PERF_RECORD_STAT_ROUND;
1209         event.header.size = sizeof(event);
1210         event.header.misc = 0;
1211
1212         event.time = evtime;
1213         event.type = type;
1214
1215         return process(tool, (union perf_event *) &event, NULL, machine);
1216 }
1217
1218 void perf_event__read_stat_config(struct perf_stat_config *config,
1219                                   struct stat_config_event *event)
1220 {
1221         unsigned i;
1222
1223         for (i = 0; i < event->nr; i++) {
1224
1225                 switch (event->data[i].tag) {
1226 #define CASE(__term, __val)                                     \
1227                 case PERF_STAT_CONFIG_TERM__##__term:           \
1228                         config->__val = event->data[i].val;     \
1229                         break;
1230
1231                 CASE(AGGR_MODE, aggr_mode)
1232                 CASE(SCALE,     scale)
1233                 CASE(INTERVAL,  interval)
1234 #undef CASE
1235                 default:
1236                         pr_warning("unknown stat config term %" PRIu64 "\n",
1237                                    event->data[i].tag);
1238                 }
1239         }
1240 }
1241
1242 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1243 {
1244         const char *s;
1245
1246         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1247                 s = " exec";
1248         else
1249                 s = "";
1250
1251         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1252 }
1253
1254 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1255 {
1256         size_t ret = 0;
1257         struct perf_ns_link_info *ns_link_info;
1258         u32 nr_namespaces, idx;
1259
1260         ns_link_info = event->namespaces.link_info;
1261         nr_namespaces = event->namespaces.nr_namespaces;
1262
1263         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1264                        event->namespaces.pid,
1265                        event->namespaces.tid,
1266                        nr_namespaces);
1267
1268         for (idx = 0; idx < nr_namespaces; idx++) {
1269                 if (idx && (idx % 4 == 0))
1270                         ret += fprintf(fp, "\n\t\t ");
1271
1272                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1273                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1274                                 (u64)ns_link_info[idx].ino,
1275                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1276         }
1277
1278         return ret;
1279 }
1280
1281 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1282                              union perf_event *event,
1283                              struct perf_sample *sample,
1284                              struct machine *machine)
1285 {
1286         return machine__process_comm_event(machine, event, sample);
1287 }
1288
1289 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1290                                    union perf_event *event,
1291                                    struct perf_sample *sample,
1292                                    struct machine *machine)
1293 {
1294         return machine__process_namespaces_event(machine, event, sample);
1295 }
1296
1297 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1298                              union perf_event *event,
1299                              struct perf_sample *sample,
1300                              struct machine *machine)
1301 {
1302         return machine__process_lost_event(machine, event, sample);
1303 }
1304
1305 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1306                             union perf_event *event,
1307                             struct perf_sample *sample __maybe_unused,
1308                             struct machine *machine)
1309 {
1310         return machine__process_aux_event(machine, event);
1311 }
1312
1313 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1314                                      union perf_event *event,
1315                                      struct perf_sample *sample __maybe_unused,
1316                                      struct machine *machine)
1317 {
1318         return machine__process_itrace_start_event(machine, event);
1319 }
1320
1321 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1322                                      union perf_event *event,
1323                                      struct perf_sample *sample,
1324                                      struct machine *machine)
1325 {
1326         return machine__process_lost_samples_event(machine, event, sample);
1327 }
1328
1329 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1330                                union perf_event *event,
1331                                struct perf_sample *sample __maybe_unused,
1332                                struct machine *machine)
1333 {
1334         return machine__process_switch_event(machine, event);
1335 }
1336
1337 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
1338                                 union perf_event *event,
1339                                 struct perf_sample *sample __maybe_unused,
1340                                 struct machine *machine)
1341 {
1342         return machine__process_ksymbol(machine, event, sample);
1343 }
1344
1345 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused,
1346                                   union perf_event *event,
1347                                   struct perf_sample *sample __maybe_unused,
1348                                   struct machine *machine)
1349 {
1350         return machine__process_bpf_event(machine, event, sample);
1351 }
1352
1353 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1354 {
1355         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1356                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1357                        event->mmap.len, event->mmap.pgoff,
1358                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1359                        event->mmap.filename);
1360 }
1361
1362 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1363 {
1364         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1365                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1366                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1367                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1368                        event->mmap2.min, event->mmap2.ino,
1369                        event->mmap2.ino_generation,
1370                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1371                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1372                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1373                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1374                        event->mmap2.filename);
1375 }
1376
1377 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1378 {
1379         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1380         size_t ret;
1381
1382         ret = fprintf(fp, " nr: ");
1383
1384         if (threads)
1385                 ret += thread_map__fprintf(threads, fp);
1386         else
1387                 ret += fprintf(fp, "failed to get threads from event\n");
1388
1389         thread_map__put(threads);
1390         return ret;
1391 }
1392
1393 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1394 {
1395         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1396         size_t ret;
1397
1398         ret = fprintf(fp, ": ");
1399
1400         if (cpus)
1401                 ret += cpu_map__fprintf(cpus, fp);
1402         else
1403                 ret += fprintf(fp, "failed to get cpumap from event\n");
1404
1405         cpu_map__put(cpus);
1406         return ret;
1407 }
1408
1409 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1410                              union perf_event *event,
1411                              struct perf_sample *sample,
1412                              struct machine *machine)
1413 {
1414         return machine__process_mmap_event(machine, event, sample);
1415 }
1416
1417 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1418                              union perf_event *event,
1419                              struct perf_sample *sample,
1420                              struct machine *machine)
1421 {
1422         return machine__process_mmap2_event(machine, event, sample);
1423 }
1424
1425 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1426 {
1427         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1428                        event->fork.pid, event->fork.tid,
1429                        event->fork.ppid, event->fork.ptid);
1430 }
1431
1432 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1433                              union perf_event *event,
1434                              struct perf_sample *sample,
1435                              struct machine *machine)
1436 {
1437         return machine__process_fork_event(machine, event, sample);
1438 }
1439
1440 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1441                              union perf_event *event,
1442                              struct perf_sample *sample,
1443                              struct machine *machine)
1444 {
1445         return machine__process_exit_event(machine, event, sample);
1446 }
1447
1448 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1449 {
1450         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1451                        event->aux.aux_offset, event->aux.aux_size,
1452                        event->aux.flags,
1453                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1454                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1455                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1456 }
1457
1458 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1459 {
1460         return fprintf(fp, " pid: %u tid: %u\n",
1461                        event->itrace_start.pid, event->itrace_start.tid);
1462 }
1463
1464 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1465 {
1466         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1467         const char *in_out = !out ? "IN         " :
1468                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1469                                     "OUT        " : "OUT preempt";
1470
1471         if (event->header.type == PERF_RECORD_SWITCH)
1472                 return fprintf(fp, " %s\n", in_out);
1473
1474         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1475                        in_out, out ? "next" : "prev",
1476                        event->context_switch.next_prev_pid,
1477                        event->context_switch.next_prev_tid);
1478 }
1479
1480 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1481 {
1482         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1483 }
1484
1485 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
1486 {
1487         return fprintf(fp, " addr %" PRIx64 " len %u type %u flags 0x%x name %s\n",
1488                        event->ksymbol_event.addr, event->ksymbol_event.len,
1489                        event->ksymbol_event.ksym_type,
1490                        event->ksymbol_event.flags, event->ksymbol_event.name);
1491 }
1492
1493 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp)
1494 {
1495         return fprintf(fp, " type %u, flags %u, id %u\n",
1496                        event->bpf_event.type, event->bpf_event.flags,
1497                        event->bpf_event.id);
1498 }
1499
1500 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1501 {
1502         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1503                              perf_event__name(event->header.type));
1504
1505         switch (event->header.type) {
1506         case PERF_RECORD_COMM:
1507                 ret += perf_event__fprintf_comm(event, fp);
1508                 break;
1509         case PERF_RECORD_FORK:
1510         case PERF_RECORD_EXIT:
1511                 ret += perf_event__fprintf_task(event, fp);
1512                 break;
1513         case PERF_RECORD_MMAP:
1514                 ret += perf_event__fprintf_mmap(event, fp);
1515                 break;
1516         case PERF_RECORD_NAMESPACES:
1517                 ret += perf_event__fprintf_namespaces(event, fp);
1518                 break;
1519         case PERF_RECORD_MMAP2:
1520                 ret += perf_event__fprintf_mmap2(event, fp);
1521                 break;
1522         case PERF_RECORD_AUX:
1523                 ret += perf_event__fprintf_aux(event, fp);
1524                 break;
1525         case PERF_RECORD_ITRACE_START:
1526                 ret += perf_event__fprintf_itrace_start(event, fp);
1527                 break;
1528         case PERF_RECORD_SWITCH:
1529         case PERF_RECORD_SWITCH_CPU_WIDE:
1530                 ret += perf_event__fprintf_switch(event, fp);
1531                 break;
1532         case PERF_RECORD_LOST:
1533                 ret += perf_event__fprintf_lost(event, fp);
1534                 break;
1535         case PERF_RECORD_KSYMBOL:
1536                 ret += perf_event__fprintf_ksymbol(event, fp);
1537                 break;
1538         case PERF_RECORD_BPF_EVENT:
1539                 ret += perf_event__fprintf_bpf_event(event, fp);
1540                 break;
1541         default:
1542                 ret += fprintf(fp, "\n");
1543         }
1544
1545         return ret;
1546 }
1547
1548 int perf_event__process(struct perf_tool *tool __maybe_unused,
1549                         union perf_event *event,
1550                         struct perf_sample *sample,
1551                         struct machine *machine)
1552 {
1553         return machine__process_event(machine, event, sample);
1554 }
1555
1556 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1557                              struct addr_location *al)
1558 {
1559         struct map_groups *mg = thread->mg;
1560         struct machine *machine = mg->machine;
1561         bool load_map = false;
1562
1563         al->machine = machine;
1564         al->thread = thread;
1565         al->addr = addr;
1566         al->cpumode = cpumode;
1567         al->filtered = 0;
1568
1569         if (machine == NULL) {
1570                 al->map = NULL;
1571                 return NULL;
1572         }
1573
1574         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1575                 al->level = 'k';
1576                 mg = &machine->kmaps;
1577                 load_map = true;
1578         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1579                 al->level = '.';
1580         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1581                 al->level = 'g';
1582                 mg = &machine->kmaps;
1583                 load_map = true;
1584         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1585                 al->level = 'u';
1586         } else {
1587                 al->level = 'H';
1588                 al->map = NULL;
1589
1590                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1591                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1592                         !perf_guest)
1593                         al->filtered |= (1 << HIST_FILTER__GUEST);
1594                 if ((cpumode == PERF_RECORD_MISC_USER ||
1595                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1596                         !perf_host)
1597                         al->filtered |= (1 << HIST_FILTER__HOST);
1598
1599                 return NULL;
1600         }
1601
1602         al->map = map_groups__find(mg, al->addr);
1603         if (al->map != NULL) {
1604                 /*
1605                  * Kernel maps might be changed when loading symbols so loading
1606                  * must be done prior to using kernel maps.
1607                  */
1608                 if (load_map)
1609                         map__load(al->map);
1610                 al->addr = al->map->map_ip(al->map, al->addr);
1611         }
1612
1613         return al->map;
1614 }
1615
1616 /*
1617  * For branch stacks or branch samples, the sample cpumode might not be correct
1618  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1619  * branch stack addresses. If possible, use a fallback to deal with those cases.
1620  */
1621 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1622                                 struct addr_location *al)
1623 {
1624         struct map *map = thread__find_map(thread, cpumode, addr, al);
1625         struct machine *machine = thread->mg->machine;
1626         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1627
1628         if (map || addr_cpumode == cpumode)
1629                 return map;
1630
1631         return thread__find_map(thread, addr_cpumode, addr, al);
1632 }
1633
1634 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1635                                    u64 addr, struct addr_location *al)
1636 {
1637         al->sym = NULL;
1638         if (thread__find_map(thread, cpumode, addr, al))
1639                 al->sym = map__find_symbol(al->map, al->addr);
1640         return al->sym;
1641 }
1642
1643 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1644                                       u64 addr, struct addr_location *al)
1645 {
1646         al->sym = NULL;
1647         if (thread__find_map_fb(thread, cpumode, addr, al))
1648                 al->sym = map__find_symbol(al->map, al->addr);
1649         return al->sym;
1650 }
1651
1652 /*
1653  * Callers need to drop the reference to al->thread, obtained in
1654  * machine__findnew_thread()
1655  */
1656 int machine__resolve(struct machine *machine, struct addr_location *al,
1657                      struct perf_sample *sample)
1658 {
1659         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1660                                                         sample->tid);
1661
1662         if (thread == NULL)
1663                 return -1;
1664
1665         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1666         thread__find_map(thread, sample->cpumode, sample->ip, al);
1667         dump_printf(" ...... dso: %s\n",
1668                     al->map ? al->map->dso->long_name :
1669                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1670
1671         if (thread__is_filtered(thread))
1672                 al->filtered |= (1 << HIST_FILTER__THREAD);
1673
1674         al->sym = NULL;
1675         al->cpu = sample->cpu;
1676         al->socket = -1;
1677         al->srcline = NULL;
1678
1679         if (al->cpu >= 0) {
1680                 struct perf_env *env = machine->env;
1681
1682                 if (env && env->cpu)
1683                         al->socket = env->cpu[al->cpu].socket_id;
1684         }
1685
1686         if (al->map) {
1687                 struct dso *dso = al->map->dso;
1688
1689                 if (symbol_conf.dso_list &&
1690                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1691                                                   dso->short_name) ||
1692                                (dso->short_name != dso->long_name &&
1693                                 strlist__has_entry(symbol_conf.dso_list,
1694                                                    dso->long_name))))) {
1695                         al->filtered |= (1 << HIST_FILTER__DSO);
1696                 }
1697
1698                 al->sym = map__find_symbol(al->map, al->addr);
1699         }
1700
1701         if (symbol_conf.sym_list &&
1702                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1703                                                 al->sym->name))) {
1704                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1705         }
1706
1707         return 0;
1708 }
1709
1710 /*
1711  * The preprocess_sample method will return with reference counts for the
1712  * in it, when done using (and perhaps getting ref counts if needing to
1713  * keep a pointer to one of those entries) it must be paired with
1714  * addr_location__put(), so that the refcounts can be decremented.
1715  */
1716 void addr_location__put(struct addr_location *al)
1717 {
1718         thread__zput(al->thread);
1719 }
1720
1721 bool is_bts_event(struct perf_event_attr *attr)
1722 {
1723         return attr->type == PERF_TYPE_HARDWARE &&
1724                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1725                attr->sample_period == 1;
1726 }
1727
1728 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1729 {
1730         if (attr->type == PERF_TYPE_SOFTWARE &&
1731             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1732              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1733              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1734                 return true;
1735
1736         if (is_bts_event(attr))
1737                 return true;
1738
1739         return false;
1740 }
1741
1742 void thread__resolve(struct thread *thread, struct addr_location *al,
1743                      struct perf_sample *sample)
1744 {
1745         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1746
1747         al->cpu = sample->cpu;
1748         al->sym = NULL;
1749
1750         if (al->map)
1751                 al->sym = map__find_symbol(al->map, al->addr);
1752 }