tools/perf/util/event.c

   1 #include <dirent.h>
   2 #include <errno.h>
   3 #include <fcntl.h>
   4 #include <inttypes.h>
   5 #include <linux/kernel.h>
   6 #include <linux/types.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <unistd.h>
  10 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  11 #include <api/fs/fs.h>
  12 #include <linux/perf_event.h>
  13 #include <linux/zalloc.h>
  14 #include "dso.h"
  15 #include "event.h"
  16 #include "debug.h"
  17 #include "hist.h"
  18 #include "machine.h"
  19 #include "sort.h"
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "thread.h"
  23 #include "thread_map.h"
  24 #include "time-utils.h"
  25 #include <linux/ctype.h>
  26 #include "map.h"
  27 #include "symbol.h"
  28 #include "symbol/kallsyms.h"
  29 #include "asm/bug.h"
  30 #include "stat.h"
  31 #include "session.h"
  32 #include "bpf-event.h"
  33 #include "tool.h"
  34 #include "../perf.h"
  35
  36 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
  37
  38 static const char *perf_event__names[] = {
  39         [0]                                     = "TOTAL",
  40         [PERF_RECORD_MMAP]                      = "MMAP",
  41         [PERF_RECORD_MMAP2]                     = "MMAP2",
  42         [PERF_RECORD_LOST]                      = "LOST",
  43         [PERF_RECORD_COMM]                      = "COMM",
  44         [PERF_RECORD_EXIT]                      = "EXIT",
  45         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  46         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  47         [PERF_RECORD_FORK]                      = "FORK",
  48         [PERF_RECORD_READ]                      = "READ",
  49         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  50         [PERF_RECORD_AUX]                       = "AUX",
  51         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  52         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  53         [PERF_RECORD_SWITCH]                    = "SWITCH",
  54         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  55         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  56         [PERF_RECORD_KSYMBOL]                   = "KSYMBOL",
  57         [PERF_RECORD_BPF_EVENT]                 = "BPF_EVENT",
  58         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  59         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  60         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  61         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  62         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  63         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  64         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  65         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  66         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  67         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  68         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  69         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  70         [PERF_RECORD_STAT]                      = "STAT",
  71         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  72         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  73         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  74         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  75         [PERF_RECORD_COMPRESSED]                = "COMPRESSED",
  76 };
  77
  78 static const char *perf_ns__names[] = {
  79         [NET_NS_INDEX]          = "net",
  80         [UTS_NS_INDEX]          = "uts",
  81         [IPC_NS_INDEX]          = "ipc",
  82         [PID_NS_INDEX]          = "pid",
  83         [USER_NS_INDEX]         = "user",
  84         [MNT_NS_INDEX]          = "mnt",
  85         [CGROUP_NS_INDEX]       = "cgroup",
  86 };
  87
  88 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
  89
  90 const char *perf_event__name(unsigned int id)
  91 {
  92         if (id >= ARRAY_SIZE(perf_event__names))
  93                 return "INVALID";
  94         if (!perf_event__names[id])
  95                 return "UNKNOWN";
  96         return perf_event__names[id];
  97 }
  98
  99 static const char *perf_ns__name(unsigned int id)
 100 {
 101         if (id >= ARRAY_SIZE(perf_ns__names))
 102                 return "UNKNOWN";
 103         return perf_ns__names[id];
 104 }
 105
 106 int perf_tool__process_synth_event(struct perf_tool *tool,
 107                                    union perf_event *event,
 108                                    struct machine *machine,
 109                                    perf_event__handler_t process)
 110 {
 111         struct perf_sample synth_sample = {
 112         .pid       = -1,
 113         .tid       = -1,
 114         .time      = -1,
 115         .stream_id = -1,
 116         .cpu       = -1,
 117         .period    = 1,
 118         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 119         };
 120
 121         return process(tool, event, &synth_sample, machine);
 122 };
 123
 124 /*
 125  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 126  * the comm, tgid and ppid.
 127  */
 128 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 129                                     pid_t *tgid, pid_t *ppid)
 130 {
 131         char filename[PATH_MAX];
 132         char bf[4096];
 133         int fd;
 134         size_t size = 0;
 135         ssize_t n;
 136         char *name, *tgids, *ppids;
 137
 138         *tgid = -1;
 139         *ppid = -1;
 140
 141         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 142
 143         fd = open(filename, O_RDONLY);
 144         if (fd < 0) {
 145                 pr_debug("couldn't open %s\n", filename);
 146                 return -1;
 147         }
 148
 149         n = read(fd, bf, sizeof(bf) - 1);
 150         close(fd);
 151         if (n <= 0) {
 152                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 153                            pid);
 154                 return -1;
 155         }
 156         bf[n] = '\0';
 157
 158         name = strstr(bf, "Name:");
 159         tgids = strstr(bf, "Tgid:");
 160         ppids = strstr(bf, "PPid:");
 161
 162         if (name) {
 163                 char *nl;
 164
 165                 name = skip_spaces(name + 5);  /* strlen("Name:") */
 166                 nl = strchr(name, '\n');
 167                 if (nl)
 168                         *nl = '\0';
 169
 170                 size = strlen(name);
 171                 if (size >= len)
 172                         size = len - 1;
 173                 memcpy(comm, name, size);
 174                 comm[size] = '\0';
 175         } else {
 176                 pr_debug("Name: string not found for pid %d\n", pid);
 177         }
 178
 179         if (tgids) {
 180                 tgids += 5;  /* strlen("Tgid:") */
 181                 *tgid = atoi(tgids);
 182         } else {
 183                 pr_debug("Tgid: string not found for pid %d\n", pid);
 184         }
 185
 186         if (ppids) {
 187                 ppids += 5;  /* strlen("PPid:") */
 188                 *ppid = atoi(ppids);
 189         } else {
 190                 pr_debug("PPid: string not found for pid %d\n", pid);
 191         }
 192
 193         return 0;
 194 }
 195
 196 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 197                                     struct machine *machine,
 198                                     pid_t *tgid, pid_t *ppid)
 199 {
 200         size_t size;
 201
 202         *ppid = -1;
 203
 204         memset(&event->comm, 0, sizeof(event->comm));
 205
 206         if (machine__is_host(machine)) {
 207                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 208                                              sizeof(event->comm.comm),
 209                                              tgid, ppid) != 0) {
 210                         return -1;
 211                 }
 212         } else {
 213                 *tgid = machine->pid;
 214         }
 215
 216         if (*tgid < 0)
 217                 return -1;
 218
 219         event->comm.pid = *tgid;
 220         event->comm.header.type = PERF_RECORD_COMM;
 221
 222         size = strlen(event->comm.comm) + 1;
 223         size = PERF_ALIGN(size, sizeof(u64));
 224         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 225         event->comm.header.size = (sizeof(event->comm) -
 226                                 (sizeof(event->comm.comm) - size) +
 227                                 machine->id_hdr_size);
 228         event->comm.tid = pid;
 229
 230         return 0;
 231 }
 232
 233 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 234                                          union perf_event *event, pid_t pid,
 235                                          perf_event__handler_t process,
 236                                          struct machine *machine)
 237 {
 238         pid_t tgid, ppid;
 239
 240         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 241                 return -1;
 242
 243         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 244                 return -1;
 245
 246         return tgid;
 247 }
 248
 249 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 250                                          struct perf_ns_link_info *ns_link_info)
 251 {
 252         struct stat64 st;
 253         char proc_ns[128];
 254
 255         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 256         if (stat64(proc_ns, &st) == 0) {
 257                 ns_link_info->dev = st.st_dev;
 258                 ns_link_info->ino = st.st_ino;
 259         }
 260 }
 261
 262 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 263                                       union perf_event *event,
 264                                       pid_t pid, pid_t tgid,
 265                                       perf_event__handler_t process,
 266                                       struct machine *machine)
 267 {
 268         u32 idx;
 269         struct perf_ns_link_info *ns_link_info;
 270
 271         if (!tool || !tool->namespace_events)
 272                 return 0;
 273
 274         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 275                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 276                machine->id_hdr_size));
 277
 278         event->namespaces.pid = tgid;
 279         event->namespaces.tid = pid;
 280
 281         event->namespaces.nr_namespaces = NR_NAMESPACES;
 282
 283         ns_link_info = event->namespaces.link_info;
 284
 285         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 286                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 287                                              &ns_link_info[idx]);
 288
 289         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 290
 291         event->namespaces.header.size = (sizeof(event->namespaces) +
 292                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 293                         machine->id_hdr_size);
 294
 295         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 296                 return -1;
 297
 298         return 0;
 299 }
 300
 301 static int perf_event__synthesize_fork(struct perf_tool *tool,
 302                                        union perf_event *event,
 303                                        pid_t pid, pid_t tgid, pid_t ppid,
 304                                        perf_event__handler_t process,
 305                                        struct machine *machine)
 306 {
 307         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 308
 309         /*
 310          * for main thread set parent to ppid from status file. For other
 311          * threads set parent pid to main thread. ie., assume main thread
 312          * spawns all threads in a process
 313         */
 314         if (tgid == pid) {
 315                 event->fork.ppid = ppid;
 316                 event->fork.ptid = ppid;
 317         } else {
 318                 event->fork.ppid = tgid;
 319                 event->fork.ptid = tgid;
 320         }
 321         event->fork.pid  = tgid;
 322         event->fork.tid  = pid;
 323         event->fork.header.type = PERF_RECORD_FORK;
 324         event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 325
 326         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 327
 328         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 329                 return -1;
 330
 331         return 0;
 332 }
 333
 334 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 335                                        union perf_event *event,
 336                                        pid_t pid, pid_t tgid,
 337                                        perf_event__handler_t process,
 338                                        struct machine *machine,
 339                                        bool mmap_data)
 340 {
 341         char filename[PATH_MAX];
 342         FILE *fp;
 343         unsigned long long t;
 344         bool truncation = false;
 345         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 346         int rc = 0;
 347         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 348         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 349
 350         if (machine__is_default_guest(machine))
 351                 return 0;
 352
 353         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 354                  machine->root_dir, pid, pid);
 355
 356         fp = fopen(filename, "r");
 357         if (fp == NULL) {
 358                 /*
 359                  * We raced with a task exiting - just return:
 360                  */
 361                 pr_debug("couldn't open %s\n", filename);
 362                 return -1;
 363         }
 364
 365         event->header.type = PERF_RECORD_MMAP2;
 366         t = rdclock();
 367
 368         while (1) {
 369                 char bf[BUFSIZ];
 370                 char prot[5];
 371                 char execname[PATH_MAX];
 372                 char anonstr[] = "//anon";
 373                 unsigned int ino;
 374                 size_t size;
 375                 ssize_t n;
 376
 377                 if (fgets(bf, sizeof(bf), fp) == NULL)
 378                         break;
 379
 380                 if ((rdclock() - t) > timeout) {
 381                         pr_warning("Reading %s time out. "
 382                                    "You may want to increase "
 383                                    "the time limit by --proc-map-timeout\n",
 384                                    filename);
 385                         truncation = true;
 386                         goto out;
 387                 }
 388
 389                 /* ensure null termination since stack will be reused. */
 390                 strcpy(execname, "");
 391
 392                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 393                 n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n",
 394                        &event->mmap2.start, &event->mmap2.len, prot,
 395                        &event->mmap2.pgoff, &event->mmap2.maj,
 396                        &event->mmap2.min,
 397                        &ino, execname);
 398
 399                 /*
 400                  * Anon maps don't have the execname.
 401                  */
 402                 if (n < 7)
 403                         continue;
 404
 405                 event->mmap2.ino = (u64)ino;
 406
 407                 /*
 408                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 409                  */
 410                 if (machine__is_host(machine))
 411                         event->header.misc = PERF_RECORD_MISC_USER;
 412                 else
 413                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 414
 415                 /* map protection and flags bits */
 416                 event->mmap2.prot = 0;
 417                 event->mmap2.flags = 0;
 418                 if (prot[0] == 'r')
 419                         event->mmap2.prot |= PROT_READ;
 420                 if (prot[1] == 'w')
 421                         event->mmap2.prot |= PROT_WRITE;
 422                 if (prot[2] == 'x')
 423                         event->mmap2.prot |= PROT_EXEC;
 424
 425                 if (prot[3] == 's')
 426                         event->mmap2.flags |= MAP_SHARED;
 427                 else
 428                         event->mmap2.flags |= MAP_PRIVATE;
 429
 430                 if (prot[2] != 'x') {
 431                         if (!mmap_data || prot[0] != 'r')
 432                                 continue;
 433
 434                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 435                 }
 436
 437 out:
 438                 if (truncation)
 439                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 440
 441                 if (!strcmp(execname, ""))
 442                         strcpy(execname, anonstr);
 443
 444                 if (hugetlbfs_mnt_len &&
 445                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 446                         strcpy(execname, anonstr);
 447                         event->mmap2.flags |= MAP_HUGETLB;
 448                 }
 449
 450                 size = strlen(execname) + 1;
 451                 memcpy(event->mmap2.filename, execname, size);
 452                 size = PERF_ALIGN(size, sizeof(u64));
 453                 event->mmap2.len -= event->mmap.start;
 454                 event->mmap2.header.size = (sizeof(event->mmap2) -
 455                                         (sizeof(event->mmap2.filename) - size));
 456                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 457                 event->mmap2.header.size += machine->id_hdr_size;
 458                 event->mmap2.pid = tgid;
 459                 event->mmap2.tid = pid;
 460
 461                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 462                         rc = -1;
 463                         break;
 464                 }
 465
 466                 if (truncation)
 467                         break;
 468         }
 469
 470         fclose(fp);
 471         return rc;
 472 }
 473
 474 int perf_event__synthesize_modules(struct perf_tool *tool,
 475                                    perf_event__handler_t process,
 476                                    struct machine *machine)
 477 {
 478         int rc = 0;
 479         struct map *pos;
 480         struct maps *maps = machine__kernel_maps(machine);
 481         union perf_event *event = zalloc((sizeof(event->mmap) +
 482                                           machine->id_hdr_size));
 483         if (event == NULL) {
 484                 pr_debug("Not enough memory synthesizing mmap event "
 485                          "for kernel modules\n");
 486                 return -1;
 487         }
 488
 489         event->header.type = PERF_RECORD_MMAP;
 490
 491         /*
 492          * kernel uses 0 for user space maps, see kernel/perf_event.c
 493          * __perf_event_mmap
 494          */
 495         if (machine__is_host(machine))
 496                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 497         else
 498                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 499
 500         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 501                 size_t size;
 502
 503                 if (!__map__is_kmodule(pos))
 504                         continue;
 505
 506                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 507                 event->mmap.header.type = PERF_RECORD_MMAP;
 508                 event->mmap.header.size = (sizeof(event->mmap) -
 509                                         (sizeof(event->mmap.filename) - size));
 510                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 511                 event->mmap.header.size += machine->id_hdr_size;
 512                 event->mmap.start = pos->start;
 513                 event->mmap.len   = pos->end - pos->start;
 514                 event->mmap.pid   = machine->pid;
 515
 516                 memcpy(event->mmap.filename, pos->dso->long_name,
 517                        pos->dso->long_name_len + 1);
 518                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 519                         rc = -1;
 520                         break;
 521                 }
 522         }
 523
 524         free(event);
 525         return rc;
 526 }
 527
 528 static int __event__synthesize_thread(union perf_event *comm_event,
 529                                       union perf_event *mmap_event,
 530                                       union perf_event *fork_event,
 531                                       union perf_event *namespaces_event,
 532                                       pid_t pid, int full,
 533                                       perf_event__handler_t process,
 534                                       struct perf_tool *tool,
 535                                       struct machine *machine,
 536                                       bool mmap_data)
 537 {
 538         char filename[PATH_MAX];
 539         DIR *tasks;
 540         struct dirent *dirent;
 541         pid_t tgid, ppid;
 542         int rc = 0;
 543
 544         /* special case: only send one comm event using passed in pid */
 545         if (!full) {
 546                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 547                                                    process, machine);
 548
 549                 if (tgid == -1)
 550                         return -1;
 551
 552                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 553                                                       tgid, process, machine) < 0)
 554                         return -1;
 555
 556                 /*
 557                  * send mmap only for thread group leader
 558                  * see thread__init_map_groups
 559                  */
 560                 if (pid == tgid &&
 561                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 562                                                        process, machine, mmap_data))
 563                         return -1;
 564
 565                 return 0;
 566         }
 567
 568         if (machine__is_default_guest(machine))
 569                 return 0;
 570
 571         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 572                  machine->root_dir, pid);
 573
 574         tasks = opendir(filename);
 575         if (tasks == NULL) {
 576                 pr_debug("couldn't open %s\n", filename);
 577                 return 0;
 578         }
 579
 580         while ((dirent = readdir(tasks)) != NULL) {
 581                 char *end;
 582                 pid_t _pid;
 583
 584                 _pid = strtol(dirent->d_name, &end, 10);
 585                 if (*end)
 586                         continue;
 587
 588                 rc = -1;
 589                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 590                                              &tgid, &ppid) != 0)
 591                         break;
 592
 593                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 594                                                 ppid, process, machine) < 0)
 595                         break;
 596
 597                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 598                                                       tgid, process, machine) < 0)
 599                         break;
 600
 601                 /*
 602                  * Send the prepared comm event
 603                  */
 604                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 605                         break;
 606
 607                 rc = 0;
 608                 if (_pid == pid) {
 609                         /* process the parent's maps too */
 610                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 611                                                 process, machine, mmap_data);
 612                         if (rc)
 613                                 break;
 614                 }
 615         }
 616
 617         closedir(tasks);
 618         return rc;
 619 }
 620
 621 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 622                                       struct perf_thread_map *threads,
 623                                       perf_event__handler_t process,
 624                                       struct machine *machine,
 625                                       bool mmap_data)
 626 {
 627         union perf_event *comm_event, *mmap_event, *fork_event;
 628         union perf_event *namespaces_event;
 629         int err = -1, thread, j;
 630
 631         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 632         if (comm_event == NULL)
 633                 goto out;
 634
 635         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 636         if (mmap_event == NULL)
 637                 goto out_free_comm;
 638
 639         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 640         if (fork_event == NULL)
 641                 goto out_free_mmap;
 642
 643         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 644                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 645                                   machine->id_hdr_size);
 646         if (namespaces_event == NULL)
 647                 goto out_free_fork;
 648
 649         err = 0;
 650         for (thread = 0; thread < threads->nr; ++thread) {
 651                 if (__event__synthesize_thread(comm_event, mmap_event,
 652                                                fork_event, namespaces_event,
 653                                                perf_thread_map__pid(threads, thread), 0,
 654                                                process, tool, machine,
 655                                                mmap_data)) {
 656                         err = -1;
 657                         break;
 658                 }
 659
 660                 /*
 661                  * comm.pid is set to thread group id by
 662                  * perf_event__synthesize_comm
 663                  */
 664                 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
 665                         bool need_leader = true;
 666
 667                         /* is thread group leader in thread_map? */
 668                         for (j = 0; j < threads->nr; ++j) {
 669                                 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
 670                                         need_leader = false;
 671                                         break;
 672                                 }
 673                         }
 674
 675                         /* if not, generate events for it */
 676                         if (need_leader &&
 677                             __event__synthesize_thread(comm_event, mmap_event,
 678                                                        fork_event, namespaces_event,
 679                                                        comm_event->comm.pid, 0,
 680                                                        process, tool, machine,
 681                                                        mmap_data)) {
 682                                 err = -1;
 683                                 break;
 684                         }
 685                 }
 686         }
 687         free(namespaces_event);
 688 out_free_fork:
 689         free(fork_event);
 690 out_free_mmap:
 691         free(mmap_event);
 692 out_free_comm:
 693         free(comm_event);
 694 out:
 695         return err;
 696 }
 697
 698 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 699                                             perf_event__handler_t process,
 700                                             struct machine *machine,
 701                                             bool mmap_data,
 702                                             struct dirent **dirent,
 703                                             int start,
 704                                             int num)
 705 {
 706         union perf_event *comm_event, *mmap_event, *fork_event;
 707         union perf_event *namespaces_event;
 708         int err = -1;
 709         char *end;
 710         pid_t pid;
 711         int i;
 712
 713         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 714         if (comm_event == NULL)
 715                 goto out;
 716
 717         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 718         if (mmap_event == NULL)
 719                 goto out_free_comm;
 720
 721         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 722         if (fork_event == NULL)
 723                 goto out_free_mmap;
 724
 725         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 726                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 727                                   machine->id_hdr_size);
 728         if (namespaces_event == NULL)
 729                 goto out_free_fork;
 730
 731         for (i = start; i < start + num; i++) {
 732                 if (!isdigit(dirent[i]->d_name[0]))
 733                         continue;
 734
 735                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 736                 /* only interested in proper numerical dirents */
 737                 if (*end)
 738                         continue;
 739                 /*
 740                  * We may race with exiting thread, so don't stop just because
 741                  * one thread couldn't be synthesized.
 742                  */
 743                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 744                                            namespaces_event, pid, 1, process,
 745                                            tool, machine, mmap_data);
 746         }
 747         err = 0;
 748
 749         free(namespaces_event);
 750 out_free_fork:
 751         free(fork_event);
 752 out_free_mmap:
 753         free(mmap_event);
 754 out_free_comm:
 755         free(comm_event);
 756 out:
 757         return err;
 758 }
 759
 760 struct synthesize_threads_arg {
 761         struct perf_tool *tool;
 762         perf_event__handler_t process;
 763         struct machine *machine;
 764         bool mmap_data;
 765         struct dirent **dirent;
 766         int num;
 767         int start;
 768 };
 769
 770 static void *synthesize_threads_worker(void *arg)
 771 {
 772         struct synthesize_threads_arg *args = arg;
 773
 774         __perf_event__synthesize_threads(args->tool, args->process,
 775                                          args->machine, args->mmap_data,
 776                                          args->dirent,
 777                                          args->start, args->num);
 778         return NULL;
 779 }
 780
 781 int perf_event__synthesize_threads(struct perf_tool *tool,
 782                                    perf_event__handler_t process,
 783                                    struct machine *machine,
 784                                    bool mmap_data,
 785                                    unsigned int nr_threads_synthesize)
 786 {
 787         struct synthesize_threads_arg *args = NULL;
 788         pthread_t *synthesize_threads = NULL;
 789         char proc_path[PATH_MAX];
 790         struct dirent **dirent;
 791         int num_per_thread;
 792         int m, n, i, j;
 793         int thread_nr;
 794         int base = 0;
 795         int err = -1;
 796
 797
 798         if (machine__is_default_guest(machine))
 799                 return 0;
 800
 801         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 802         n = scandir(proc_path, &dirent, 0, alphasort);
 803         if (n < 0)
 804                 return err;
 805
 806         if (nr_threads_synthesize == UINT_MAX)
 807                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 808         else
 809                 thread_nr = nr_threads_synthesize;
 810
 811         if (thread_nr <= 1) {
 812                 err = __perf_event__synthesize_threads(tool, process,
 813                                                        machine, mmap_data,
 814                                                        dirent, base, n);
 815                 goto free_dirent;
 816         }
 817         if (thread_nr > n)
 818                 thread_nr = n;
 819
 820         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 821         if (synthesize_threads == NULL)
 822                 goto free_dirent;
 823
 824         args = calloc(sizeof(*args), thread_nr);
 825         if (args == NULL)
 826                 goto free_threads;
 827
 828         num_per_thread = n / thread_nr;
 829         m = n % thread_nr;
 830         for (i = 0; i < thread_nr; i++) {
 831                 args[i].tool = tool;
 832                 args[i].process = process;
 833                 args[i].machine = machine;
 834                 args[i].mmap_data = mmap_data;
 835                 args[i].dirent = dirent;
 836         }
 837         for (i = 0; i < m; i++) {
 838                 args[i].num = num_per_thread + 1;
 839                 args[i].start = i * args[i].num;
 840         }
 841         if (i != 0)
 842                 base = args[i-1].start + args[i-1].num;
 843         for (j = i; j < thread_nr; j++) {
 844                 args[j].num = num_per_thread;
 845                 args[j].start = base + (j - i) * args[i].num;
 846         }
 847
 848         for (i = 0; i < thread_nr; i++) {
 849                 if (pthread_create(&synthesize_threads[i], NULL,
 850                                    synthesize_threads_worker, &args[i]))
 851                         goto out_join;
 852         }
 853         err = 0;
 854 out_join:
 855         for (i = 0; i < thread_nr; i++)
 856                 pthread_join(synthesize_threads[i], NULL);
 857         free(args);
 858 free_threads:
 859         free(synthesize_threads);
 860 free_dirent:
 861         for (i = 0; i < n; i++)
 862                 zfree(&dirent[i]);
 863         free(dirent);
 864
 865         return err;
 866 }
 867
 868 struct process_symbol_args {
 869         const char *name;
 870         u64        start;
 871 };
 872
 873 static int find_symbol_cb(void *arg, const char *name, char type,
 874                           u64 start)
 875 {
 876         struct process_symbol_args *args = arg;
 877
 878         /*
 879          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 880          * an 'A' to the same address as "_stext".
 881          */
 882         if (!(kallsyms__is_function(type) ||
 883               type == 'A') || strcmp(name, args->name))
 884                 return 0;
 885
 886         args->start = start;
 887         return 1;
 888 }
 889
 890 int kallsyms__get_function_start(const char *kallsyms_filename,
 891                                  const char *symbol_name, u64 *addr)
 892 {
 893         struct process_symbol_args args = { .name = symbol_name, };
 894
 895         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 896                 return -1;
 897
 898         *addr = args.start;
 899         return 0;
 900 }
 901
 902 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
 903                                               perf_event__handler_t process __maybe_unused,
 904                                               struct machine *machine __maybe_unused)
 905 {
 906         return 0;
 907 }
 908
 909 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 910                                                 perf_event__handler_t process,
 911                                                 struct machine *machine)
 912 {
 913         size_t size;
 914         struct map *map = machine__kernel_map(machine);
 915         struct kmap *kmap;
 916         int err;
 917         union perf_event *event;
 918
 919         if (map == NULL)
 920                 return -1;
 921
 922         kmap = map__kmap(map);
 923         if (!kmap->ref_reloc_sym)
 924                 return -1;
 925
 926         /*
 927          * We should get this from /sys/kernel/sections/.text, but till that is
 928          * available use this, and after it is use this as a fallback for older
 929          * kernels.
 930          */
 931         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 932         if (event == NULL) {
 933                 pr_debug("Not enough memory synthesizing mmap event "
 934                          "for kernel modules\n");
 935                 return -1;
 936         }
 937
 938         if (machine__is_host(machine)) {
 939                 /*
 940                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 941                  * see kernel/perf_event.c __perf_event_mmap
 942                  */
 943                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 944         } else {
 945                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 946         }
 947
 948         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 949                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 950         size = PERF_ALIGN(size, sizeof(u64));
 951         event->mmap.header.type = PERF_RECORD_MMAP;
 952         event->mmap.header.size = (sizeof(event->mmap) -
 953                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 954         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 955         event->mmap.start = map->start;
 956         event->mmap.len   = map->end - event->mmap.start;
 957         event->mmap.pid   = machine->pid;
 958
 959         err = perf_tool__process_synth_event(tool, event, machine, process);
 960         free(event);
 961
 962         return err;
 963 }
 964
 965 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 966                                        perf_event__handler_t process,
 967                                        struct machine *machine)
 968 {
 969         int err;
 970
 971         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
 972         if (err < 0)
 973                 return err;
 974
 975         return perf_event__synthesize_extra_kmaps(tool, process, machine);
 976 }
 977
 978 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 979                                       struct perf_thread_map *threads,
 980                                       perf_event__handler_t process,
 981                                       struct machine *machine)
 982 {
 983         union perf_event *event;
 984         int i, err, size;
 985
 986         size  = sizeof(event->thread_map);
 987         size += threads->nr * sizeof(event->thread_map.entries[0]);
 988
 989         event = zalloc(size);
 990         if (!event)
 991                 return -ENOMEM;
 992
 993         event->header.type = PERF_RECORD_THREAD_MAP;
 994         event->header.size = size;
 995         event->thread_map.nr = threads->nr;
 996
 997         for (i = 0; i < threads->nr; i++) {
 998                 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
 999                 char *comm = perf_thread_map__comm(threads, i);
1000
1001                 if (!comm)
1002                         comm = (char *) "";
1003
1004                 entry->pid = perf_thread_map__pid(threads, i);
1005                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1006         }
1007
1008         err = process(tool, event, NULL, machine);
1009
1010         free(event);
1011         return err;
1012 }
1013
1014 static void synthesize_cpus(struct cpu_map_entries *cpus,
1015                             struct perf_cpu_map *map)
1016 {
1017         int i;
1018
1019         cpus->nr = map->nr;
1020
1021         for (i = 0; i < map->nr; i++)
1022                 cpus->cpu[i] = map->map[i];
1023 }
1024
1025 static void synthesize_mask(struct perf_record_record_cpu_map *mask,
1026                             struct perf_cpu_map *map, int max)
1027 {
1028         int i;
1029
1030         mask->nr = BITS_TO_LONGS(max);
1031         mask->long_size = sizeof(long);
1032
1033         for (i = 0; i < map->nr; i++)
1034                 set_bit(map->map[i], mask->mask);
1035 }
1036
1037 static size_t cpus_size(struct perf_cpu_map *map)
1038 {
1039         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1040 }
1041
1042 static size_t mask_size(struct perf_cpu_map *map, int *max)
1043 {
1044         int i;
1045
1046         *max = 0;
1047
1048         for (i = 0; i < map->nr; i++) {
1049                 /* bit possition of the cpu is + 1 */
1050                 int bit = map->map[i] + 1;
1051
1052                 if (bit > *max)
1053                         *max = bit;
1054         }
1055
1056         return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
1057 }
1058
1059 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
1060 {
1061         size_t size_cpus, size_mask;
1062         bool is_dummy = perf_cpu_map__empty(map);
1063
1064         /*
1065          * Both array and mask data have variable size based
1066          * on the number of cpus and their actual values.
1067          * The size of the 'struct perf_record_cpu_map_data' is:
1068          *
1069          *   array = size of 'struct cpu_map_entries' +
1070          *           number of cpus * sizeof(u64)
1071          *
1072          *   mask  = size of 'struct perf_record_record_cpu_map' +
1073          *           maximum cpu bit converted to size of longs
1074          *
1075          * and finaly + the size of 'struct perf_record_cpu_map_data'.
1076          */
1077         size_cpus = cpus_size(map);
1078         size_mask = mask_size(map, max);
1079
1080         if (is_dummy || (size_cpus < size_mask)) {
1081                 *size += size_cpus;
1082                 *type  = PERF_CPU_MAP__CPUS;
1083         } else {
1084                 *size += size_mask;
1085                 *type  = PERF_CPU_MAP__MASK;
1086         }
1087
1088         *size += sizeof(struct perf_record_cpu_map_data);
1089         *size = PERF_ALIGN(*size, sizeof(u64));
1090         return zalloc(*size);
1091 }
1092
1093 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
1094                               u16 type, int max)
1095 {
1096         data->type = type;
1097
1098         switch (type) {
1099         case PERF_CPU_MAP__CPUS:
1100                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1101                 break;
1102         case PERF_CPU_MAP__MASK:
1103                 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
1104         default:
1105                 break;
1106         };
1107 }
1108
1109 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
1110 {
1111         size_t size = sizeof(struct perf_record_cpu_map);
1112         struct perf_record_cpu_map *event;
1113         int max;
1114         u16 type;
1115
1116         event = cpu_map_data__alloc(map, &size, &type, &max);
1117         if (!event)
1118                 return NULL;
1119
1120         event->header.type = PERF_RECORD_CPU_MAP;
1121         event->header.size = size;
1122         event->data.type   = type;
1123
1124         cpu_map_data__synthesize(&event->data, map, type, max);
1125         return event;
1126 }
1127
1128 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1129                                    struct perf_cpu_map *map,
1130                                    perf_event__handler_t process,
1131                                    struct machine *machine)
1132 {
1133         struct perf_record_cpu_map *event;
1134         int err;
1135
1136         event = cpu_map_event__new(map);
1137         if (!event)
1138                 return -ENOMEM;
1139
1140         err = process(tool, (union perf_event *) event, NULL, machine);
1141
1142         free(event);
1143         return err;
1144 }
1145
1146 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1147                                        struct perf_stat_config *config,
1148                                        perf_event__handler_t process,
1149                                        struct machine *machine)
1150 {
1151         struct perf_record_stat_config *event;
1152         int size, i = 0, err;
1153
1154         size  = sizeof(*event);
1155         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1156
1157         event = zalloc(size);
1158         if (!event)
1159                 return -ENOMEM;
1160
1161         event->header.type = PERF_RECORD_STAT_CONFIG;
1162         event->header.size = size;
1163         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1164
1165 #define ADD(__term, __val)                                      \
1166         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1167         event->data[i].val = __val;                             \
1168         i++;
1169
1170         ADD(AGGR_MODE,  config->aggr_mode)
1171         ADD(INTERVAL,   config->interval)
1172         ADD(SCALE,      config->scale)
1173
1174         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1175                   "stat config terms unbalanced\n");
1176 #undef ADD
1177
1178         err = process(tool, (union perf_event *) event, NULL, machine);
1179
1180         free(event);
1181         return err;
1182 }
1183
1184 int perf_event__synthesize_stat(struct perf_tool *tool,
1185                                 u32 cpu, u32 thread, u64 id,
1186                                 struct perf_counts_values *count,
1187                                 perf_event__handler_t process,
1188                                 struct machine *machine)
1189 {
1190         struct perf_record_stat event;
1191
1192         event.header.type = PERF_RECORD_STAT;
1193         event.header.size = sizeof(event);
1194         event.header.misc = 0;
1195
1196         event.id        = id;
1197         event.cpu       = cpu;
1198         event.thread    = thread;
1199         event.val       = count->val;
1200         event.ena       = count->ena;
1201         event.run       = count->run;
1202
1203         return process(tool, (union perf_event *) &event, NULL, machine);
1204 }
1205
1206 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1207                                       u64 evtime, u64 type,
1208                                       perf_event__handler_t process,
1209                                       struct machine *machine)
1210 {
1211         struct perf_record_stat_round event;
1212
1213         event.header.type = PERF_RECORD_STAT_ROUND;
1214         event.header.size = sizeof(event);
1215         event.header.misc = 0;
1216
1217         event.time = evtime;
1218         event.type = type;
1219
1220         return process(tool, (union perf_event *) &event, NULL, machine);
1221 }
1222
1223 void perf_event__read_stat_config(struct perf_stat_config *config,
1224                                   struct perf_record_stat_config *event)
1225 {
1226         unsigned i;
1227
1228         for (i = 0; i < event->nr; i++) {
1229
1230                 switch (event->data[i].tag) {
1231 #define CASE(__term, __val)                                     \
1232                 case PERF_STAT_CONFIG_TERM__##__term:           \
1233                         config->__val = event->data[i].val;     \
1234                         break;
1235
1236                 CASE(AGGR_MODE, aggr_mode)
1237                 CASE(SCALE,     scale)
1238                 CASE(INTERVAL,  interval)
1239 #undef CASE
1240                 default:
1241                         pr_warning("unknown stat config term %" PRI_lu64 "\n",
1242                                    event->data[i].tag);
1243                 }
1244         }
1245 }
1246
1247 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1248 {
1249         const char *s;
1250
1251         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1252                 s = " exec";
1253         else
1254                 s = "";
1255
1256         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1257 }
1258
1259 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1260 {
1261         size_t ret = 0;
1262         struct perf_ns_link_info *ns_link_info;
1263         u32 nr_namespaces, idx;
1264
1265         ns_link_info = event->namespaces.link_info;
1266         nr_namespaces = event->namespaces.nr_namespaces;
1267
1268         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1269                        event->namespaces.pid,
1270                        event->namespaces.tid,
1271                        nr_namespaces);
1272
1273         for (idx = 0; idx < nr_namespaces; idx++) {
1274                 if (idx && (idx % 4 == 0))
1275                         ret += fprintf(fp, "\n\t\t ");
1276
1277                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1278                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1279                                 (u64)ns_link_info[idx].ino,
1280                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1281         }
1282
1283         return ret;
1284 }
1285
1286 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1287                              union perf_event *event,
1288                              struct perf_sample *sample,
1289                              struct machine *machine)
1290 {
1291         return machine__process_comm_event(machine, event, sample);
1292 }
1293
1294 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1295                                    union perf_event *event,
1296                                    struct perf_sample *sample,
1297                                    struct machine *machine)
1298 {
1299         return machine__process_namespaces_event(machine, event, sample);
1300 }
1301
1302 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1303                              union perf_event *event,
1304                              struct perf_sample *sample,
1305                              struct machine *machine)
1306 {
1307         return machine__process_lost_event(machine, event, sample);
1308 }
1309
1310 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1311                             union perf_event *event,
1312                             struct perf_sample *sample __maybe_unused,
1313                             struct machine *machine)
1314 {
1315         return machine__process_aux_event(machine, event);
1316 }
1317
1318 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1319                                      union perf_event *event,
1320                                      struct perf_sample *sample __maybe_unused,
1321                                      struct machine *machine)
1322 {
1323         return machine__process_itrace_start_event(machine, event);
1324 }
1325
1326 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1327                                      union perf_event *event,
1328                                      struct perf_sample *sample,
1329                                      struct machine *machine)
1330 {
1331         return machine__process_lost_samples_event(machine, event, sample);
1332 }
1333
1334 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1335                                union perf_event *event,
1336                                struct perf_sample *sample __maybe_unused,
1337                                struct machine *machine)
1338 {
1339         return machine__process_switch_event(machine, event);
1340 }
1341
1342 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
1343                                 union perf_event *event,
1344                                 struct perf_sample *sample __maybe_unused,
1345                                 struct machine *machine)
1346 {
1347         return machine__process_ksymbol(machine, event, sample);
1348 }
1349
1350 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
1351                             union perf_event *event,
1352                             struct perf_sample *sample,
1353                             struct machine *machine)
1354 {
1355         return machine__process_bpf(machine, event, sample);
1356 }
1357
1358 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1359 {
1360         return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
1361                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1362                        event->mmap.len, event->mmap.pgoff,
1363                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1364                        event->mmap.filename);
1365 }
1366
1367 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1368 {
1369         return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
1370                            " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
1371                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1372                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1373                        event->mmap2.min, event->mmap2.ino,
1374                        event->mmap2.ino_generation,
1375                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1376                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1377                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1378                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1379                        event->mmap2.filename);
1380 }
1381
1382 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1383 {
1384         struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
1385         size_t ret;
1386
1387         ret = fprintf(fp, " nr: ");
1388
1389         if (threads)
1390                 ret += thread_map__fprintf(threads, fp);
1391         else
1392                 ret += fprintf(fp, "failed to get threads from event\n");
1393
1394         perf_thread_map__put(threads);
1395         return ret;
1396 }
1397
1398 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1399 {
1400         struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1401         size_t ret;
1402
1403         ret = fprintf(fp, ": ");
1404
1405         if (cpus)
1406                 ret += cpu_map__fprintf(cpus, fp);
1407         else
1408                 ret += fprintf(fp, "failed to get cpumap from event\n");
1409
1410         perf_cpu_map__put(cpus);
1411         return ret;
1412 }
1413
1414 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1415                              union perf_event *event,
1416                              struct perf_sample *sample,
1417                              struct machine *machine)
1418 {
1419         return machine__process_mmap_event(machine, event, sample);
1420 }
1421
1422 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1423                              union perf_event *event,
1424                              struct perf_sample *sample,
1425                              struct machine *machine)
1426 {
1427         return machine__process_mmap2_event(machine, event, sample);
1428 }
1429
1430 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1431 {
1432         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1433                        event->fork.pid, event->fork.tid,
1434                        event->fork.ppid, event->fork.ptid);
1435 }
1436
1437 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1438                              union perf_event *event,
1439                              struct perf_sample *sample,
1440                              struct machine *machine)
1441 {
1442         return machine__process_fork_event(machine, event, sample);
1443 }
1444
1445 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1446                              union perf_event *event,
1447                              struct perf_sample *sample,
1448                              struct machine *machine)
1449 {
1450         return machine__process_exit_event(machine, event, sample);
1451 }
1452
1453 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1454 {
1455         return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
1456                        event->aux.aux_offset, event->aux.aux_size,
1457                        event->aux.flags,
1458                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1459                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1460                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1461 }
1462
1463 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1464 {
1465         return fprintf(fp, " pid: %u tid: %u\n",
1466                        event->itrace_start.pid, event->itrace_start.tid);
1467 }
1468
1469 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1470 {
1471         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1472         const char *in_out = !out ? "IN         " :
1473                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1474                                     "OUT        " : "OUT preempt";
1475
1476         if (event->header.type == PERF_RECORD_SWITCH)
1477                 return fprintf(fp, " %s\n", in_out);
1478
1479         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1480                        in_out, out ? "next" : "prev",
1481                        event->context_switch.next_prev_pid,
1482                        event->context_switch.next_prev_tid);
1483 }
1484
1485 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1486 {
1487         return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
1488 }
1489
1490 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
1491 {
1492         return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
1493                        event->ksymbol.addr, event->ksymbol.len,
1494                        event->ksymbol.ksym_type,
1495                        event->ksymbol.flags, event->ksymbol.name);
1496 }
1497
1498 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
1499 {
1500         return fprintf(fp, " type %u, flags %u, id %u\n",
1501                        event->bpf.type, event->bpf.flags, event->bpf.id);
1502 }
1503
1504 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1505 {
1506         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1507                              perf_event__name(event->header.type));
1508
1509         switch (event->header.type) {
1510         case PERF_RECORD_COMM:
1511                 ret += perf_event__fprintf_comm(event, fp);
1512                 break;
1513         case PERF_RECORD_FORK:
1514         case PERF_RECORD_EXIT:
1515                 ret += perf_event__fprintf_task(event, fp);
1516                 break;
1517         case PERF_RECORD_MMAP:
1518                 ret += perf_event__fprintf_mmap(event, fp);
1519                 break;
1520         case PERF_RECORD_NAMESPACES:
1521                 ret += perf_event__fprintf_namespaces(event, fp);
1522                 break;
1523         case PERF_RECORD_MMAP2:
1524                 ret += perf_event__fprintf_mmap2(event, fp);
1525                 break;
1526         case PERF_RECORD_AUX:
1527                 ret += perf_event__fprintf_aux(event, fp);
1528                 break;
1529         case PERF_RECORD_ITRACE_START:
1530                 ret += perf_event__fprintf_itrace_start(event, fp);
1531                 break;
1532         case PERF_RECORD_SWITCH:
1533         case PERF_RECORD_SWITCH_CPU_WIDE:
1534                 ret += perf_event__fprintf_switch(event, fp);
1535                 break;
1536         case PERF_RECORD_LOST:
1537                 ret += perf_event__fprintf_lost(event, fp);
1538                 break;
1539         case PERF_RECORD_KSYMBOL:
1540                 ret += perf_event__fprintf_ksymbol(event, fp);
1541                 break;
1542         case PERF_RECORD_BPF_EVENT:
1543                 ret += perf_event__fprintf_bpf(event, fp);
1544                 break;
1545         default:
1546                 ret += fprintf(fp, "\n");
1547         }
1548
1549         return ret;
1550 }
1551
1552 int perf_event__process(struct perf_tool *tool __maybe_unused,
1553                         union perf_event *event,
1554                         struct perf_sample *sample,
1555                         struct machine *machine)
1556 {
1557         return machine__process_event(machine, event, sample);
1558 }
1559
1560 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1561                              struct addr_location *al)
1562 {
1563         struct map_groups *mg = thread->mg;
1564         struct machine *machine = mg->machine;
1565         bool load_map = false;
1566
1567         al->machine = machine;
1568         al->thread = thread;
1569         al->addr = addr;
1570         al->cpumode = cpumode;
1571         al->filtered = 0;
1572
1573         if (machine == NULL) {
1574                 al->map = NULL;
1575                 return NULL;
1576         }
1577
1578         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1579                 al->level = 'k';
1580                 mg = &machine->kmaps;
1581                 load_map = true;
1582         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1583                 al->level = '.';
1584         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1585                 al->level = 'g';
1586                 mg = &machine->kmaps;
1587                 load_map = true;
1588         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1589                 al->level = 'u';
1590         } else {
1591                 al->level = 'H';
1592                 al->map = NULL;
1593
1594                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1595                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1596                         !perf_guest)
1597                         al->filtered |= (1 << HIST_FILTER__GUEST);
1598                 if ((cpumode == PERF_RECORD_MISC_USER ||
1599                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1600                         !perf_host)
1601                         al->filtered |= (1 << HIST_FILTER__HOST);
1602
1603                 return NULL;
1604         }
1605
1606         al->map = map_groups__find(mg, al->addr);
1607         if (al->map != NULL) {
1608                 /*
1609                  * Kernel maps might be changed when loading symbols so loading
1610                  * must be done prior to using kernel maps.
1611                  */
1612                 if (load_map)
1613                         map__load(al->map);
1614                 al->addr = al->map->map_ip(al->map, al->addr);
1615         }
1616
1617         return al->map;
1618 }
1619
1620 /*
1621  * For branch stacks or branch samples, the sample cpumode might not be correct
1622  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1623  * branch stack addresses. If possible, use a fallback to deal with those cases.
1624  */
1625 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1626                                 struct addr_location *al)
1627 {
1628         struct map *map = thread__find_map(thread, cpumode, addr, al);
1629         struct machine *machine = thread->mg->machine;
1630         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1631
1632         if (map || addr_cpumode == cpumode)
1633                 return map;
1634
1635         return thread__find_map(thread, addr_cpumode, addr, al);
1636 }
1637
1638 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1639                                    u64 addr, struct addr_location *al)
1640 {
1641         al->sym = NULL;
1642         if (thread__find_map(thread, cpumode, addr, al))
1643                 al->sym = map__find_symbol(al->map, al->addr);
1644         return al->sym;
1645 }
1646
1647 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1648                                       u64 addr, struct addr_location *al)
1649 {
1650         al->sym = NULL;
1651         if (thread__find_map_fb(thread, cpumode, addr, al))
1652                 al->sym = map__find_symbol(al->map, al->addr);
1653         return al->sym;
1654 }
1655
1656 /*
1657  * Callers need to drop the reference to al->thread, obtained in
1658  * machine__findnew_thread()
1659  */
1660 int machine__resolve(struct machine *machine, struct addr_location *al,
1661                      struct perf_sample *sample)
1662 {
1663         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1664                                                         sample->tid);
1665
1666         if (thread == NULL)
1667                 return -1;
1668
1669         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1670         thread__find_map(thread, sample->cpumode, sample->ip, al);
1671         dump_printf(" ...... dso: %s\n",
1672                     al->map ? al->map->dso->long_name :
1673                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1674
1675         if (thread__is_filtered(thread))
1676                 al->filtered |= (1 << HIST_FILTER__THREAD);
1677
1678         al->sym = NULL;
1679         al->cpu = sample->cpu;
1680         al->socket = -1;
1681         al->srcline = NULL;
1682
1683         if (al->cpu >= 0) {
1684                 struct perf_env *env = machine->env;
1685
1686                 if (env && env->cpu)
1687                         al->socket = env->cpu[al->cpu].socket_id;
1688         }
1689
1690         if (al->map) {
1691                 struct dso *dso = al->map->dso;
1692
1693                 if (symbol_conf.dso_list &&
1694                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1695                                                   dso->short_name) ||
1696                                (dso->short_name != dso->long_name &&
1697                                 strlist__has_entry(symbol_conf.dso_list,
1698                                                    dso->long_name))))) {
1699                         al->filtered |= (1 << HIST_FILTER__DSO);
1700                 }
1701
1702                 al->sym = map__find_symbol(al->map, al->addr);
1703         }
1704
1705         if (symbol_conf.sym_list &&
1706                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1707                                                 al->sym->name))) {
1708                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1709         }
1710
1711         return 0;
1712 }
1713
1714 /*
1715  * The preprocess_sample method will return with reference counts for the
1716  * in it, when done using (and perhaps getting ref counts if needing to
1717  * keep a pointer to one of those entries) it must be paired with
1718  * addr_location__put(), so that the refcounts can be decremented.
1719  */
1720 void addr_location__put(struct addr_location *al)
1721 {
1722         thread__zput(al->thread);
1723 }
1724
1725 bool is_bts_event(struct perf_event_attr *attr)
1726 {
1727         return attr->type == PERF_TYPE_HARDWARE &&
1728                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1729                attr->sample_period == 1;
1730 }
1731
1732 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1733 {
1734         if (attr->type == PERF_TYPE_SOFTWARE &&
1735             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1736              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1737              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1738                 return true;
1739
1740         if (is_bts_event(attr))
1741                 return true;
1742
1743         return false;
1744 }
1745
1746 void thread__resolve(struct thread *thread, struct addr_location *al,
1747                      struct perf_sample *sample)
1748 {
1749         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1750
1751         al->cpu = sample->cpu;
1752         al->sym = NULL;
1753
1754         if (al->map)
1755                 al->sym = map__find_symbol(al->map, al->addr);
1756 }