1 // SPDX-License-Identifier: GPL-2.0 2 #include <dirent.h> 3 #include <errno.h> 4 #include <fcntl.h> 5 #include <inttypes.h> 6 #include <linux/kernel.h> 7 #include <linux/types.h> 8 #include <sys/types.h> 9 #include <sys/stat.h> 10 #include <unistd.h> 11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */ 12 #include <api/fs/fs.h> 13 #include <linux/perf_event.h> 14 #include "event.h" 15 #include "debug.h" 16 #include "hist.h" 17 #include "machine.h" 18 #include "sort.h" 19 #include "string2.h" 20 #include "strlist.h" 21 #include "thread.h" 22 #include "thread_map.h" 23 #include "sane_ctype.h" 24 #include "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 }; 72 73 static const char *perf_ns__names[] = { 74 [NET_NS_INDEX] = "net", 75 [UTS_NS_INDEX] = "uts", 76 [IPC_NS_INDEX] = "ipc", 77 [PID_NS_INDEX] = "pid", 78 [USER_NS_INDEX] = "user", 79 [MNT_NS_INDEX] = "mnt", 80 [CGROUP_NS_INDEX] = "cgroup", 81 }; 82 83 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT; 84 85 const char *perf_event__name(unsigned int id) 86 { 87 if (id >= ARRAY_SIZE(perf_event__names)) 88 return "INVALID"; 89 if (!perf_event__names[id]) 90 return "UNKNOWN"; 91 return perf_event__names[id]; 92 } 93 94 static const char *perf_ns__name(unsigned int id) 95 { 96 if (id >= ARRAY_SIZE(perf_ns__names)) 97 return "UNKNOWN"; 98 return perf_ns__names[id]; 99 } 100 101 int perf_tool__process_synth_event(struct perf_tool *tool, 102 union perf_event *event, 103 struct machine *machine, 104 perf_event__handler_t process) 105 { 106 struct perf_sample synth_sample = { 107 .pid = -1, 108 .tid = -1, 109 .time = -1, 110 .stream_id = -1, 111 .cpu = -1, 112 .period = 1, 113 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, 114 }; 115 116 return process(tool, event, &synth_sample, machine); 117 }; 118 119 /* 120 * Assumes that the first 4095 bytes of /proc/pid/stat contains 121 * the comm, tgid and ppid. 122 */ 123 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 124 pid_t *tgid, pid_t *ppid) 125 { 126 char filename[PATH_MAX]; 127 char bf[4096]; 128 int fd; 129 size_t size = 0; 130 ssize_t n; 131 char *name, *tgids, *ppids; 132 133 *tgid = -1; 134 *ppid = -1; 135 136 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 137 138 fd = open(filename, O_RDONLY); 139 if (fd < 0) { 140 pr_debug("couldn't open %s\n", filename); 141 return -1; 142 } 143 144 n = read(fd, bf, sizeof(bf) - 1); 145 close(fd); 146 if (n <= 0) { 147 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 148 pid); 149 return -1; 150 } 151 bf[n] = '\0'; 152 153 name = strstr(bf, "Name:"); 154 tgids = strstr(bf, "Tgid:"); 155 ppids = strstr(bf, "PPid:"); 156 157 if (name) { 158 char *nl; 159 160 name += 5; /* strlen("Name:") */ 161 name = ltrim(name); 162 163 nl = strchr(name, '\n'); 164 if (nl) 165 *nl = '\0'; 166 167 size = strlen(name); 168 if (size >= len) 169 size = len - 1; 170 memcpy(comm, name, size); 171 comm[size] = '\0'; 172 } else { 173 pr_debug("Name: string not found for pid %d\n", pid); 174 } 175 176 if (tgids) { 177 tgids += 5; /* strlen("Tgid:") */ 178 *tgid = atoi(tgids); 179 } else { 180 pr_debug("Tgid: string not found for pid %d\n", pid); 181 } 182 183 if (ppids) { 184 ppids += 5; /* strlen("PPid:") */ 185 *ppid = atoi(ppids); 186 } else { 187 pr_debug("PPid: string not found for pid %d\n", pid); 188 } 189 190 return 0; 191 } 192 193 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 194 struct machine *machine, 195 pid_t *tgid, pid_t *ppid) 196 { 197 size_t size; 198 199 *ppid = -1; 200 201 memset(&event->comm, 0, sizeof(event->comm)); 202 203 if (machine__is_host(machine)) { 204 if (perf_event__get_comm_ids(pid, event->comm.comm, 205 sizeof(event->comm.comm), 206 tgid, ppid) != 0) { 207 return -1; 208 } 209 } else { 210 *tgid = machine->pid; 211 } 212 213 if (*tgid < 0) 214 return -1; 215 216 event->comm.pid = *tgid; 217 event->comm.header.type = PERF_RECORD_COMM; 218 219 size = strlen(event->comm.comm) + 1; 220 size = PERF_ALIGN(size, sizeof(u64)); 221 memset(event->comm.comm + size, 0, machine->id_hdr_size); 222 event->comm.header.size = (sizeof(event->comm) - 223 (sizeof(event->comm.comm) - size) + 224 machine->id_hdr_size); 225 event->comm.tid = pid; 226 227 return 0; 228 } 229 230 pid_t perf_event__synthesize_comm(struct perf_tool *tool, 231 union perf_event *event, pid_t pid, 232 perf_event__handler_t process, 233 struct machine *machine) 234 { 235 pid_t tgid, ppid; 236 237 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 238 return -1; 239 240 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 241 return -1; 242 243 return tgid; 244 } 245 246 static void perf_event__get_ns_link_info(pid_t pid, const char *ns, 247 struct perf_ns_link_info *ns_link_info) 248 { 249 struct stat64 st; 250 char proc_ns[128]; 251 252 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns); 253 if (stat64(proc_ns, &st) == 0) { 254 ns_link_info->dev = st.st_dev; 255 ns_link_info->ino = st.st_ino; 256 } 257 } 258 259 int perf_event__synthesize_namespaces(struct perf_tool *tool, 260 union perf_event *event, 261 pid_t pid, pid_t tgid, 262 perf_event__handler_t process, 263 struct machine *machine) 264 { 265 u32 idx; 266 struct perf_ns_link_info *ns_link_info; 267 268 if (!tool || !tool->namespace_events) 269 return 0; 270 271 memset(&event->namespaces, 0, (sizeof(event->namespaces) + 272 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 273 machine->id_hdr_size)); 274 275 event->namespaces.pid = tgid; 276 event->namespaces.tid = pid; 277 278 event->namespaces.nr_namespaces = NR_NAMESPACES; 279 280 ns_link_info = event->namespaces.link_info; 281 282 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++) 283 perf_event__get_ns_link_info(pid, perf_ns__name(idx), 284 &ns_link_info[idx]); 285 286 event->namespaces.header.type = PERF_RECORD_NAMESPACES; 287 288 event->namespaces.header.size = (sizeof(event->namespaces) + 289 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 290 machine->id_hdr_size); 291 292 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 293 return -1; 294 295 return 0; 296 } 297 298 static int perf_event__synthesize_fork(struct perf_tool *tool, 299 union perf_event *event, 300 pid_t pid, pid_t tgid, pid_t ppid, 301 perf_event__handler_t process, 302 struct machine *machine) 303 { 304 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 305 306 /* 307 * for main thread set parent to ppid from status file. For other 308 * threads set parent pid to main thread. ie., assume main thread 309 * spawns all threads in a process 310 */ 311 if (tgid == pid) { 312 event->fork.ppid = ppid; 313 event->fork.ptid = ppid; 314 } else { 315 event->fork.ppid = tgid; 316 event->fork.ptid = tgid; 317 } 318 event->fork.pid = tgid; 319 event->fork.tid = pid; 320 event->fork.header.type = PERF_RECORD_FORK; 321 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC; 322 323 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 324 325 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 326 return -1; 327 328 return 0; 329 } 330 331 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 332 union perf_event *event, 333 pid_t pid, pid_t tgid, 334 perf_event__handler_t process, 335 struct machine *machine, 336 bool mmap_data) 337 { 338 char filename[PATH_MAX]; 339 FILE *fp; 340 unsigned long long t; 341 bool truncation = false; 342 unsigned long long timeout = proc_map_timeout * 1000000ULL; 343 int rc = 0; 344 const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); 345 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; 346 347 if (machine__is_default_guest(machine)) 348 return 0; 349 350 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps", 351 machine->root_dir, pid, pid); 352 353 fp = fopen(filename, "r"); 354 if (fp == NULL) { 355 /* 356 * We raced with a task exiting - just return: 357 */ 358 pr_debug("couldn't open %s\n", filename); 359 return -1; 360 } 361 362 event->header.type = PERF_RECORD_MMAP2; 363 t = rdclock(); 364 365 while (1) { 366 char bf[BUFSIZ]; 367 char prot[5]; 368 char execname[PATH_MAX]; 369 char anonstr[] = "//anon"; 370 unsigned int ino; 371 size_t size; 372 ssize_t n; 373 374 if (fgets(bf, sizeof(bf), fp) == NULL) 375 break; 376 377 if ((rdclock() - t) > timeout) { 378 pr_warning("Reading %s time out. " 379 "You may want to increase " 380 "the time limit by --proc-map-timeout\n", 381 filename); 382 truncation = true; 383 goto out; 384 } 385 386 /* ensure null termination since stack will be reused. */ 387 strcpy(execname, ""); 388 389 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 390 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n", 391 &event->mmap2.start, &event->mmap2.len, prot, 392 &event->mmap2.pgoff, &event->mmap2.maj, 393 &event->mmap2.min, 394 &ino, execname); 395 396 /* 397 * Anon maps don't have the execname. 398 */ 399 if (n < 7) 400 continue; 401 402 event->mmap2.ino = (u64)ino; 403 404 /* 405 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 406 */ 407 if (machine__is_host(machine)) 408 event->header.misc = PERF_RECORD_MISC_USER; 409 else 410 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 411 412 /* map protection and flags bits */ 413 event->mmap2.prot = 0; 414 event->mmap2.flags = 0; 415 if (prot[0] == 'r') 416 event->mmap2.prot |= PROT_READ; 417 if (prot[1] == 'w') 418 event->mmap2.prot |= PROT_WRITE; 419 if (prot[2] == 'x') 420 event->mmap2.prot |= PROT_EXEC; 421 422 if (prot[3] == 's') 423 event->mmap2.flags |= MAP_SHARED; 424 else 425 event->mmap2.flags |= MAP_PRIVATE; 426 427 if (prot[2] != 'x') { 428 if (!mmap_data || prot[0] != 'r') 429 continue; 430 431 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 432 } 433 434 out: 435 if (truncation) 436 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; 437 438 if (!strcmp(execname, "")) 439 strcpy(execname, anonstr); 440 441 if (hugetlbfs_mnt_len && 442 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { 443 strcpy(execname, anonstr); 444 event->mmap2.flags |= MAP_HUGETLB; 445 } 446 447 size = strlen(execname) + 1; 448 memcpy(event->mmap2.filename, execname, size); 449 size = PERF_ALIGN(size, sizeof(u64)); 450 event->mmap2.len -= event->mmap.start; 451 event->mmap2.header.size = (sizeof(event->mmap2) - 452 (sizeof(event->mmap2.filename) - size)); 453 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 454 event->mmap2.header.size += machine->id_hdr_size; 455 event->mmap2.pid = tgid; 456 event->mmap2.tid = pid; 457 458 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 459 rc = -1; 460 break; 461 } 462 463 if (truncation) 464 break; 465 } 466 467 fclose(fp); 468 return rc; 469 } 470 471 int perf_event__synthesize_modules(struct perf_tool *tool, 472 perf_event__handler_t process, 473 struct machine *machine) 474 { 475 int rc = 0; 476 struct map *pos; 477 struct maps *maps = machine__kernel_maps(machine); 478 union perf_event *event = zalloc((sizeof(event->mmap) + 479 machine->id_hdr_size)); 480 if (event == NULL) { 481 pr_debug("Not enough memory synthesizing mmap event " 482 "for kernel modules\n"); 483 return -1; 484 } 485 486 event->header.type = PERF_RECORD_MMAP; 487 488 /* 489 * kernel uses 0 for user space maps, see kernel/perf_event.c 490 * __perf_event_mmap 491 */ 492 if (machine__is_host(machine)) 493 event->header.misc = PERF_RECORD_MISC_KERNEL; 494 else 495 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 496 497 for (pos = maps__first(maps); pos; pos = map__next(pos)) { 498 size_t size; 499 500 if (!__map__is_kmodule(pos)) 501 continue; 502 503 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 504 event->mmap.header.type = PERF_RECORD_MMAP; 505 event->mmap.header.size = (sizeof(event->mmap) - 506 (sizeof(event->mmap.filename) - size)); 507 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 508 event->mmap.header.size += machine->id_hdr_size; 509 event->mmap.start = pos->start; 510 event->mmap.len = pos->end - pos->start; 511 event->mmap.pid = machine->pid; 512 513 memcpy(event->mmap.filename, pos->dso->long_name, 514 pos->dso->long_name_len + 1); 515 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 516 rc = -1; 517 break; 518 } 519 } 520 521 free(event); 522 return rc; 523 } 524 525 static int __event__synthesize_thread(union perf_event *comm_event, 526 union perf_event *mmap_event, 527 union perf_event *fork_event, 528 union perf_event *namespaces_event, 529 pid_t pid, int full, 530 perf_event__handler_t process, 531 struct perf_tool *tool, 532 struct machine *machine, 533 bool mmap_data) 534 { 535 char filename[PATH_MAX]; 536 DIR *tasks; 537 struct dirent *dirent; 538 pid_t tgid, ppid; 539 int rc = 0; 540 541 /* special case: only send one comm event using passed in pid */ 542 if (!full) { 543 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 544 process, machine); 545 546 if (tgid == -1) 547 return -1; 548 549 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid, 550 tgid, process, machine) < 0) 551 return -1; 552 553 /* 554 * send mmap only for thread group leader 555 * see thread__init_map_groups 556 */ 557 if (pid == tgid && 558 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 559 process, machine, mmap_data)) 560 return -1; 561 562 return 0; 563 } 564 565 if (machine__is_default_guest(machine)) 566 return 0; 567 568 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 569 machine->root_dir, pid); 570 571 tasks = opendir(filename); 572 if (tasks == NULL) { 573 pr_debug("couldn't open %s\n", filename); 574 return 0; 575 } 576 577 while ((dirent = readdir(tasks)) != NULL) { 578 char *end; 579 pid_t _pid; 580 581 _pid = strtol(dirent->d_name, &end, 10); 582 if (*end) 583 continue; 584 585 rc = -1; 586 if (perf_event__prepare_comm(comm_event, _pid, machine, 587 &tgid, &ppid) != 0) 588 break; 589 590 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 591 ppid, process, machine) < 0) 592 break; 593 594 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid, 595 tgid, process, machine) < 0) 596 break; 597 598 /* 599 * Send the prepared comm event 600 */ 601 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) 602 break; 603 604 rc = 0; 605 if (_pid == pid) { 606 /* process the parent's maps too */ 607 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 608 process, machine, mmap_data); 609 if (rc) 610 break; 611 } 612 } 613 614 closedir(tasks); 615 return rc; 616 } 617 618 int perf_event__synthesize_thread_map(struct perf_tool *tool, 619 struct thread_map *threads, 620 perf_event__handler_t process, 621 struct machine *machine, 622 bool mmap_data) 623 { 624 union perf_event *comm_event, *mmap_event, *fork_event; 625 union perf_event *namespaces_event; 626 int err = -1, thread, j; 627 628 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 629 if (comm_event == NULL) 630 goto out; 631 632 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 633 if (mmap_event == NULL) 634 goto out_free_comm; 635 636 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 637 if (fork_event == NULL) 638 goto out_free_mmap; 639 640 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 641 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 642 machine->id_hdr_size); 643 if (namespaces_event == NULL) 644 goto out_free_fork; 645 646 err = 0; 647 for (thread = 0; thread < threads->nr; ++thread) { 648 if (__event__synthesize_thread(comm_event, mmap_event, 649 fork_event, namespaces_event, 650 thread_map__pid(threads, thread), 0, 651 process, tool, machine, 652 mmap_data)) { 653 err = -1; 654 break; 655 } 656 657 /* 658 * comm.pid is set to thread group id by 659 * perf_event__synthesize_comm 660 */ 661 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) { 662 bool need_leader = true; 663 664 /* is thread group leader in thread_map? */ 665 for (j = 0; j < threads->nr; ++j) { 666 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) { 667 need_leader = false; 668 break; 669 } 670 } 671 672 /* if not, generate events for it */ 673 if (need_leader && 674 __event__synthesize_thread(comm_event, mmap_event, 675 fork_event, namespaces_event, 676 comm_event->comm.pid, 0, 677 process, tool, machine, 678 mmap_data)) { 679 err = -1; 680 break; 681 } 682 } 683 } 684 free(namespaces_event); 685 out_free_fork: 686 free(fork_event); 687 out_free_mmap: 688 free(mmap_event); 689 out_free_comm: 690 free(comm_event); 691 out: 692 return err; 693 } 694 695 static int __perf_event__synthesize_threads(struct perf_tool *tool, 696 perf_event__handler_t process, 697 struct machine *machine, 698 bool mmap_data, 699 struct dirent **dirent, 700 int start, 701 int num) 702 { 703 union perf_event *comm_event, *mmap_event, *fork_event; 704 union perf_event *namespaces_event; 705 int err = -1; 706 char *end; 707 pid_t pid; 708 int i; 709 710 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 711 if (comm_event == NULL) 712 goto out; 713 714 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 715 if (mmap_event == NULL) 716 goto out_free_comm; 717 718 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 719 if (fork_event == NULL) 720 goto out_free_mmap; 721 722 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 723 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 724 machine->id_hdr_size); 725 if (namespaces_event == NULL) 726 goto out_free_fork; 727 728 for (i = start; i < start + num; i++) { 729 if (!isdigit(dirent[i]->d_name[0])) 730 continue; 731 732 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); 733 /* only interested in proper numerical dirents */ 734 if (*end) 735 continue; 736 /* 737 * We may race with exiting thread, so don't stop just because 738 * one thread couldn't be synthesized. 739 */ 740 __event__synthesize_thread(comm_event, mmap_event, fork_event, 741 namespaces_event, pid, 1, process, 742 tool, machine, mmap_data); 743 } 744 err = 0; 745 746 free(namespaces_event); 747 out_free_fork: 748 free(fork_event); 749 out_free_mmap: 750 free(mmap_event); 751 out_free_comm: 752 free(comm_event); 753 out: 754 return err; 755 } 756 757 struct synthesize_threads_arg { 758 struct perf_tool *tool; 759 perf_event__handler_t process; 760 struct machine *machine; 761 bool mmap_data; 762 struct dirent **dirent; 763 int num; 764 int start; 765 }; 766 767 static void *synthesize_threads_worker(void *arg) 768 { 769 struct synthesize_threads_arg *args = arg; 770 771 __perf_event__synthesize_threads(args->tool, args->process, 772 args->machine, args->mmap_data, 773 args->dirent, 774 args->start, args->num); 775 return NULL; 776 } 777 778 int perf_event__synthesize_threads(struct perf_tool *tool, 779 perf_event__handler_t process, 780 struct machine *machine, 781 bool mmap_data, 782 unsigned int nr_threads_synthesize) 783 { 784 struct synthesize_threads_arg *args = NULL; 785 pthread_t *synthesize_threads = NULL; 786 char proc_path[PATH_MAX]; 787 struct dirent **dirent; 788 int num_per_thread; 789 int m, n, i, j; 790 int thread_nr; 791 int base = 0; 792 int err = -1; 793 794 795 if (machine__is_default_guest(machine)) 796 return 0; 797 798 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 799 n = scandir(proc_path, &dirent, 0, alphasort); 800 if (n < 0) 801 return err; 802 803 if (nr_threads_synthesize == UINT_MAX) 804 thread_nr = sysconf(_SC_NPROCESSORS_ONLN); 805 else 806 thread_nr = nr_threads_synthesize; 807 808 if (thread_nr <= 1) { 809 err = __perf_event__synthesize_threads(tool, process, 810 machine, mmap_data, 811 dirent, base, n); 812 goto free_dirent; 813 } 814 if (thread_nr > n) 815 thread_nr = n; 816 817 synthesize_threads = calloc(sizeof(pthread_t), thread_nr); 818 if (synthesize_threads == NULL) 819 goto free_dirent; 820 821 args = calloc(sizeof(*args), thread_nr); 822 if (args == NULL) 823 goto free_threads; 824 825 num_per_thread = n / thread_nr; 826 m = n % thread_nr; 827 for (i = 0; i < thread_nr; i++) { 828 args[i].tool = tool; 829 args[i].process = process; 830 args[i].machine = machine; 831 args[i].mmap_data = mmap_data; 832 args[i].dirent = dirent; 833 } 834 for (i = 0; i < m; i++) { 835 args[i].num = num_per_thread + 1; 836 args[i].start = i * args[i].num; 837 } 838 if (i != 0) 839 base = args[i-1].start + args[i-1].num; 840 for (j = i; j < thread_nr; j++) { 841 args[j].num = num_per_thread; 842 args[j].start = base + (j - i) * args[i].num; 843 } 844 845 for (i = 0; i < thread_nr; i++) { 846 if (pthread_create(&synthesize_threads[i], NULL, 847 synthesize_threads_worker, &args[i])) 848 goto out_join; 849 } 850 err = 0; 851 out_join: 852 for (i = 0; i < thread_nr; i++) 853 pthread_join(synthesize_threads[i], NULL); 854 free(args); 855 free_threads: 856 free(synthesize_threads); 857 free_dirent: 858 for (i = 0; i < n; i++) 859 free(dirent[i]); 860 free(dirent); 861 862 return err; 863 } 864 865 struct process_symbol_args { 866 const char *name; 867 u64 start; 868 }; 869 870 static int find_symbol_cb(void *arg, const char *name, char type, 871 u64 start) 872 { 873 struct process_symbol_args *args = arg; 874 875 /* 876 * Must be a function or at least an alias, as in PARISC64, where "_text" is 877 * an 'A' to the same address as "_stext". 878 */ 879 if (!(kallsyms__is_function(type) || 880 type == 'A') || strcmp(name, args->name)) 881 return 0; 882 883 args->start = start; 884 return 1; 885 } 886 887 int kallsyms__get_function_start(const char *kallsyms_filename, 888 const char *symbol_name, u64 *addr) 889 { 890 struct process_symbol_args args = { .name = symbol_name, }; 891 892 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 893 return -1; 894 895 *addr = args.start; 896 return 0; 897 } 898 899 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused, 900 perf_event__handler_t process __maybe_unused, 901 struct machine *machine __maybe_unused) 902 { 903 return 0; 904 } 905 906 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 907 perf_event__handler_t process, 908 struct machine *machine) 909 { 910 size_t size; 911 struct map *map = machine__kernel_map(machine); 912 struct kmap *kmap; 913 int err; 914 union perf_event *event; 915 916 if (symbol_conf.kptr_restrict) 917 return -1; 918 if (map == NULL) 919 return -1; 920 921 /* 922 * We should get this from /sys/kernel/sections/.text, but till that is 923 * available use this, and after it is use this as a fallback for older 924 * kernels. 925 */ 926 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 927 if (event == NULL) { 928 pr_debug("Not enough memory synthesizing mmap event " 929 "for kernel modules\n"); 930 return -1; 931 } 932 933 if (machine__is_host(machine)) { 934 /* 935 * kernel uses PERF_RECORD_MISC_USER for user space maps, 936 * see kernel/perf_event.c __perf_event_mmap 937 */ 938 event->header.misc = PERF_RECORD_MISC_KERNEL; 939 } else { 940 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 941 } 942 943 kmap = map__kmap(map); 944 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 945 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; 946 size = PERF_ALIGN(size, sizeof(u64)); 947 event->mmap.header.type = PERF_RECORD_MMAP; 948 event->mmap.header.size = (sizeof(event->mmap) - 949 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 950 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 951 event->mmap.start = map->start; 952 event->mmap.len = map->end - event->mmap.start; 953 event->mmap.pid = machine->pid; 954 955 err = perf_tool__process_synth_event(tool, event, machine, process); 956 free(event); 957 958 return err; 959 } 960 961 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 962 perf_event__handler_t process, 963 struct machine *machine) 964 { 965 int err; 966 967 err = __perf_event__synthesize_kernel_mmap(tool, process, machine); 968 if (err < 0) 969 return err; 970 971 return perf_event__synthesize_extra_kmaps(tool, process, machine); 972 } 973 974 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 975 struct thread_map *threads, 976 perf_event__handler_t process, 977 struct machine *machine) 978 { 979 union perf_event *event; 980 int i, err, size; 981 982 size = sizeof(event->thread_map); 983 size += threads->nr * sizeof(event->thread_map.entries[0]); 984 985 event = zalloc(size); 986 if (!event) 987 return -ENOMEM; 988 989 event->header.type = PERF_RECORD_THREAD_MAP; 990 event->header.size = size; 991 event->thread_map.nr = threads->nr; 992 993 for (i = 0; i < threads->nr; i++) { 994 struct thread_map_event_entry *entry = &event->thread_map.entries[i]; 995 char *comm = thread_map__comm(threads, i); 996 997 if (!comm) 998 comm = (char *) ""; 999 1000 entry->pid = thread_map__pid(threads, i); 1001 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 1002 } 1003 1004 err = process(tool, event, NULL, machine); 1005 1006 free(event); 1007 return err; 1008 } 1009 1010 static void synthesize_cpus(struct cpu_map_entries *cpus, 1011 struct cpu_map *map) 1012 { 1013 int i; 1014 1015 cpus->nr = map->nr; 1016 1017 for (i = 0; i < map->nr; i++) 1018 cpus->cpu[i] = map->map[i]; 1019 } 1020 1021 static void synthesize_mask(struct cpu_map_mask *mask, 1022 struct cpu_map *map, int max) 1023 { 1024 int i; 1025 1026 mask->nr = BITS_TO_LONGS(max); 1027 mask->long_size = sizeof(long); 1028 1029 for (i = 0; i < map->nr; i++) 1030 set_bit(map->map[i], mask->mask); 1031 } 1032 1033 static size_t cpus_size(struct cpu_map *map) 1034 { 1035 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 1036 } 1037 1038 static size_t mask_size(struct cpu_map *map, int *max) 1039 { 1040 int i; 1041 1042 *max = 0; 1043 1044 for (i = 0; i < map->nr; i++) { 1045 /* bit possition of the cpu is + 1 */ 1046 int bit = map->map[i] + 1; 1047 1048 if (bit > *max) 1049 *max = bit; 1050 } 1051 1052 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long); 1053 } 1054 1055 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max) 1056 { 1057 size_t size_cpus, size_mask; 1058 bool is_dummy = cpu_map__empty(map); 1059 1060 /* 1061 * Both array and mask data have variable size based 1062 * on the number of cpus and their actual values. 1063 * The size of the 'struct cpu_map_data' is: 1064 * 1065 * array = size of 'struct cpu_map_entries' + 1066 * number of cpus * sizeof(u64) 1067 * 1068 * mask = size of 'struct cpu_map_mask' + 1069 * maximum cpu bit converted to size of longs 1070 * 1071 * and finaly + the size of 'struct cpu_map_data'. 1072 */ 1073 size_cpus = cpus_size(map); 1074 size_mask = mask_size(map, max); 1075 1076 if (is_dummy || (size_cpus < size_mask)) { 1077 *size += size_cpus; 1078 *type = PERF_CPU_MAP__CPUS; 1079 } else { 1080 *size += size_mask; 1081 *type = PERF_CPU_MAP__MASK; 1082 } 1083 1084 *size += sizeof(struct cpu_map_data); 1085 *size = PERF_ALIGN(*size, sizeof(u64)); 1086 return zalloc(*size); 1087 } 1088 1089 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map, 1090 u16 type, int max) 1091 { 1092 data->type = type; 1093 1094 switch (type) { 1095 case PERF_CPU_MAP__CPUS: 1096 synthesize_cpus((struct cpu_map_entries *) data->data, map); 1097 break; 1098 case PERF_CPU_MAP__MASK: 1099 synthesize_mask((struct cpu_map_mask *) data->data, map, max); 1100 default: 1101 break; 1102 }; 1103 } 1104 1105 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map) 1106 { 1107 size_t size = sizeof(struct cpu_map_event); 1108 struct cpu_map_event *event; 1109 int max; 1110 u16 type; 1111 1112 event = cpu_map_data__alloc(map, &size, &type, &max); 1113 if (!event) 1114 return NULL; 1115 1116 event->header.type = PERF_RECORD_CPU_MAP; 1117 event->header.size = size; 1118 event->data.type = type; 1119 1120 cpu_map_data__synthesize(&event->data, map, type, max); 1121 return event; 1122 } 1123 1124 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 1125 struct cpu_map *map, 1126 perf_event__handler_t process, 1127 struct machine *machine) 1128 { 1129 struct cpu_map_event *event; 1130 int err; 1131 1132 event = cpu_map_event__new(map); 1133 if (!event) 1134 return -ENOMEM; 1135 1136 err = process(tool, (union perf_event *) event, NULL, machine); 1137 1138 free(event); 1139 return err; 1140 } 1141 1142 int perf_event__synthesize_stat_config(struct perf_tool *tool, 1143 struct perf_stat_config *config, 1144 perf_event__handler_t process, 1145 struct machine *machine) 1146 { 1147 struct stat_config_event *event; 1148 int size, i = 0, err; 1149 1150 size = sizeof(*event); 1151 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 1152 1153 event = zalloc(size); 1154 if (!event) 1155 return -ENOMEM; 1156 1157 event->header.type = PERF_RECORD_STAT_CONFIG; 1158 event->header.size = size; 1159 event->nr = PERF_STAT_CONFIG_TERM__MAX; 1160 1161 #define ADD(__term, __val) \ 1162 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 1163 event->data[i].val = __val; \ 1164 i++; 1165 1166 ADD(AGGR_MODE, config->aggr_mode) 1167 ADD(INTERVAL, config->interval) 1168 ADD(SCALE, config->scale) 1169 1170 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 1171 "stat config terms unbalanced\n"); 1172 #undef ADD 1173 1174 err = process(tool, (union perf_event *) event, NULL, machine); 1175 1176 free(event); 1177 return err; 1178 } 1179 1180 int perf_event__synthesize_stat(struct perf_tool *tool, 1181 u32 cpu, u32 thread, u64 id, 1182 struct perf_counts_values *count, 1183 perf_event__handler_t process, 1184 struct machine *machine) 1185 { 1186 struct stat_event event; 1187 1188 event.header.type = PERF_RECORD_STAT; 1189 event.header.size = sizeof(event); 1190 event.header.misc = 0; 1191 1192 event.id = id; 1193 event.cpu = cpu; 1194 event.thread = thread; 1195 event.val = count->val; 1196 event.ena = count->ena; 1197 event.run = count->run; 1198 1199 return process(tool, (union perf_event *) &event, NULL, machine); 1200 } 1201 1202 int perf_event__synthesize_stat_round(struct perf_tool *tool, 1203 u64 evtime, u64 type, 1204 perf_event__handler_t process, 1205 struct machine *machine) 1206 { 1207 struct stat_round_event event; 1208 1209 event.header.type = PERF_RECORD_STAT_ROUND; 1210 event.header.size = sizeof(event); 1211 event.header.misc = 0; 1212 1213 event.time = evtime; 1214 event.type = type; 1215 1216 return process(tool, (union perf_event *) &event, NULL, machine); 1217 } 1218 1219 void perf_event__read_stat_config(struct perf_stat_config *config, 1220 struct stat_config_event *event) 1221 { 1222 unsigned i; 1223 1224 for (i = 0; i < event->nr; i++) { 1225 1226 switch (event->data[i].tag) { 1227 #define CASE(__term, __val) \ 1228 case PERF_STAT_CONFIG_TERM__##__term: \ 1229 config->__val = event->data[i].val; \ 1230 break; 1231 1232 CASE(AGGR_MODE, aggr_mode) 1233 CASE(SCALE, scale) 1234 CASE(INTERVAL, interval) 1235 #undef CASE 1236 default: 1237 pr_warning("unknown stat config term %" PRIu64 "\n", 1238 event->data[i].tag); 1239 } 1240 } 1241 } 1242 1243 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 1244 { 1245 const char *s; 1246 1247 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 1248 s = " exec"; 1249 else 1250 s = ""; 1251 1252 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 1253 } 1254 1255 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp) 1256 { 1257 size_t ret = 0; 1258 struct perf_ns_link_info *ns_link_info; 1259 u32 nr_namespaces, idx; 1260 1261 ns_link_info = event->namespaces.link_info; 1262 nr_namespaces = event->namespaces.nr_namespaces; 1263 1264 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[", 1265 event->namespaces.pid, 1266 event->namespaces.tid, 1267 nr_namespaces); 1268 1269 for (idx = 0; idx < nr_namespaces; idx++) { 1270 if (idx && (idx % 4 == 0)) 1271 ret += fprintf(fp, "\n\t\t "); 1272 1273 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx, 1274 perf_ns__name(idx), (u64)ns_link_info[idx].dev, 1275 (u64)ns_link_info[idx].ino, 1276 ((idx + 1) != nr_namespaces) ? ", " : "]\n"); 1277 } 1278 1279 return ret; 1280 } 1281 1282 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 1283 union perf_event *event, 1284 struct perf_sample *sample, 1285 struct machine *machine) 1286 { 1287 return machine__process_comm_event(machine, event, sample); 1288 } 1289 1290 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused, 1291 union perf_event *event, 1292 struct perf_sample *sample, 1293 struct machine *machine) 1294 { 1295 return machine__process_namespaces_event(machine, event, sample); 1296 } 1297 1298 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 1299 union perf_event *event, 1300 struct perf_sample *sample, 1301 struct machine *machine) 1302 { 1303 return machine__process_lost_event(machine, event, sample); 1304 } 1305 1306 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 1307 union perf_event *event, 1308 struct perf_sample *sample __maybe_unused, 1309 struct machine *machine) 1310 { 1311 return machine__process_aux_event(machine, event); 1312 } 1313 1314 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 1315 union perf_event *event, 1316 struct perf_sample *sample __maybe_unused, 1317 struct machine *machine) 1318 { 1319 return machine__process_itrace_start_event(machine, event); 1320 } 1321 1322 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused, 1323 union perf_event *event, 1324 struct perf_sample *sample, 1325 struct machine *machine) 1326 { 1327 return machine__process_lost_samples_event(machine, event, sample); 1328 } 1329 1330 int perf_event__process_switch(struct perf_tool *tool __maybe_unused, 1331 union perf_event *event, 1332 struct perf_sample *sample __maybe_unused, 1333 struct machine *machine) 1334 { 1335 return machine__process_switch_event(machine, event); 1336 } 1337 1338 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused, 1339 union perf_event *event, 1340 struct perf_sample *sample __maybe_unused, 1341 struct machine *machine) 1342 { 1343 return machine__process_ksymbol(machine, event, sample); 1344 } 1345 1346 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused, 1347 union perf_event *event, 1348 struct perf_sample *sample __maybe_unused, 1349 struct machine *machine) 1350 { 1351 return machine__process_bpf_event(machine, event, sample); 1352 } 1353 1354 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 1355 { 1356 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", 1357 event->mmap.pid, event->mmap.tid, event->mmap.start, 1358 event->mmap.len, event->mmap.pgoff, 1359 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 1360 event->mmap.filename); 1361 } 1362 1363 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 1364 { 1365 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 1366 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", 1367 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 1368 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 1369 event->mmap2.min, event->mmap2.ino, 1370 event->mmap2.ino_generation, 1371 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 1372 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 1373 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 1374 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 1375 event->mmap2.filename); 1376 } 1377 1378 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) 1379 { 1380 struct thread_map *threads = thread_map__new_event(&event->thread_map); 1381 size_t ret; 1382 1383 ret = fprintf(fp, " nr: "); 1384 1385 if (threads) 1386 ret += thread_map__fprintf(threads, fp); 1387 else 1388 ret += fprintf(fp, "failed to get threads from event\n"); 1389 1390 thread_map__put(threads); 1391 return ret; 1392 } 1393 1394 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) 1395 { 1396 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); 1397 size_t ret; 1398 1399 ret = fprintf(fp, ": "); 1400 1401 if (cpus) 1402 ret += cpu_map__fprintf(cpus, fp); 1403 else 1404 ret += fprintf(fp, "failed to get cpumap from event\n"); 1405 1406 cpu_map__put(cpus); 1407 return ret; 1408 } 1409 1410 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 1411 union perf_event *event, 1412 struct perf_sample *sample, 1413 struct machine *machine) 1414 { 1415 return machine__process_mmap_event(machine, event, sample); 1416 } 1417 1418 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 1419 union perf_event *event, 1420 struct perf_sample *sample, 1421 struct machine *machine) 1422 { 1423 return machine__process_mmap2_event(machine, event, sample); 1424 } 1425 1426 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 1427 { 1428 return fprintf(fp, "(%d:%d):(%d:%d)\n", 1429 event->fork.pid, event->fork.tid, 1430 event->fork.ppid, event->fork.ptid); 1431 } 1432 1433 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 1434 union perf_event *event, 1435 struct perf_sample *sample, 1436 struct machine *machine) 1437 { 1438 return machine__process_fork_event(machine, event, sample); 1439 } 1440 1441 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 1442 union perf_event *event, 1443 struct perf_sample *sample, 1444 struct machine *machine) 1445 { 1446 return machine__process_exit_event(machine, event, sample); 1447 } 1448 1449 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 1450 { 1451 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n", 1452 event->aux.aux_offset, event->aux.aux_size, 1453 event->aux.flags, 1454 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 1455 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "", 1456 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : ""); 1457 } 1458 1459 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 1460 { 1461 return fprintf(fp, " pid: %u tid: %u\n", 1462 event->itrace_start.pid, event->itrace_start.tid); 1463 } 1464 1465 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) 1466 { 1467 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; 1468 const char *in_out = !out ? "IN " : 1469 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ? 1470 "OUT " : "OUT preempt"; 1471 1472 if (event->header.type == PERF_RECORD_SWITCH) 1473 return fprintf(fp, " %s\n", in_out); 1474 1475 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", 1476 in_out, out ? "next" : "prev", 1477 event->context_switch.next_prev_pid, 1478 event->context_switch.next_prev_tid); 1479 } 1480 1481 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp) 1482 { 1483 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost); 1484 } 1485 1486 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp) 1487 { 1488 return fprintf(fp, " ksymbol event with addr %" PRIx64 " len %u type %u flags 0x%x name %s\n", 1489 event->ksymbol_event.addr, event->ksymbol_event.len, 1490 event->ksymbol_event.ksym_type, 1491 event->ksymbol_event.flags, event->ksymbol_event.name); 1492 } 1493 1494 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp) 1495 { 1496 return fprintf(fp, " bpf event with type %u, flags %u, id %u\n", 1497 event->bpf_event.type, event->bpf_event.flags, 1498 event->bpf_event.id); 1499 } 1500 1501 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 1502 { 1503 size_t ret = fprintf(fp, "PERF_RECORD_%s", 1504 perf_event__name(event->header.type)); 1505 1506 switch (event->header.type) { 1507 case PERF_RECORD_COMM: 1508 ret += perf_event__fprintf_comm(event, fp); 1509 break; 1510 case PERF_RECORD_FORK: 1511 case PERF_RECORD_EXIT: 1512 ret += perf_event__fprintf_task(event, fp); 1513 break; 1514 case PERF_RECORD_MMAP: 1515 ret += perf_event__fprintf_mmap(event, fp); 1516 break; 1517 case PERF_RECORD_NAMESPACES: 1518 ret += perf_event__fprintf_namespaces(event, fp); 1519 break; 1520 case PERF_RECORD_MMAP2: 1521 ret += perf_event__fprintf_mmap2(event, fp); 1522 break; 1523 case PERF_RECORD_AUX: 1524 ret += perf_event__fprintf_aux(event, fp); 1525 break; 1526 case PERF_RECORD_ITRACE_START: 1527 ret += perf_event__fprintf_itrace_start(event, fp); 1528 break; 1529 case PERF_RECORD_SWITCH: 1530 case PERF_RECORD_SWITCH_CPU_WIDE: 1531 ret += perf_event__fprintf_switch(event, fp); 1532 break; 1533 case PERF_RECORD_LOST: 1534 ret += perf_event__fprintf_lost(event, fp); 1535 break; 1536 case PERF_RECORD_KSYMBOL: 1537 ret += perf_event__fprintf_ksymbol(event, fp); 1538 break; 1539 case PERF_RECORD_BPF_EVENT: 1540 ret += perf_event__fprintf_bpf_event(event, fp); 1541 break; 1542 default: 1543 ret += fprintf(fp, "\n"); 1544 } 1545 1546 return ret; 1547 } 1548 1549 int perf_event__process(struct perf_tool *tool __maybe_unused, 1550 union perf_event *event, 1551 struct perf_sample *sample, 1552 struct machine *machine) 1553 { 1554 return machine__process_event(machine, event, sample); 1555 } 1556 1557 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 1558 struct addr_location *al) 1559 { 1560 struct map_groups *mg = thread->mg; 1561 struct machine *machine = mg->machine; 1562 bool load_map = false; 1563 1564 al->machine = machine; 1565 al->thread = thread; 1566 al->addr = addr; 1567 al->cpumode = cpumode; 1568 al->filtered = 0; 1569 1570 if (machine == NULL) { 1571 al->map = NULL; 1572 return NULL; 1573 } 1574 1575 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 1576 al->level = 'k'; 1577 mg = &machine->kmaps; 1578 load_map = true; 1579 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 1580 al->level = '.'; 1581 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 1582 al->level = 'g'; 1583 mg = &machine->kmaps; 1584 load_map = true; 1585 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 1586 al->level = 'u'; 1587 } else { 1588 al->level = 'H'; 1589 al->map = NULL; 1590 1591 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 1592 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 1593 !perf_guest) 1594 al->filtered |= (1 << HIST_FILTER__GUEST); 1595 if ((cpumode == PERF_RECORD_MISC_USER || 1596 cpumode == PERF_RECORD_MISC_KERNEL) && 1597 !perf_host) 1598 al->filtered |= (1 << HIST_FILTER__HOST); 1599 1600 return NULL; 1601 } 1602 1603 al->map = map_groups__find(mg, al->addr); 1604 if (al->map != NULL) { 1605 /* 1606 * Kernel maps might be changed when loading symbols so loading 1607 * must be done prior to using kernel maps. 1608 */ 1609 if (load_map) 1610 map__load(al->map); 1611 al->addr = al->map->map_ip(al->map, al->addr); 1612 } 1613 1614 return al->map; 1615 } 1616 1617 /* 1618 * For branch stacks or branch samples, the sample cpumode might not be correct 1619 * because it applies only to the sample 'ip' and not necessary to 'addr' or 1620 * branch stack addresses. If possible, use a fallback to deal with those cases. 1621 */ 1622 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr, 1623 struct addr_location *al) 1624 { 1625 struct map *map = thread__find_map(thread, cpumode, addr, al); 1626 struct machine *machine = thread->mg->machine; 1627 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr); 1628 1629 if (map || addr_cpumode == cpumode) 1630 return map; 1631 1632 return thread__find_map(thread, addr_cpumode, addr, al); 1633 } 1634 1635 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode, 1636 u64 addr, struct addr_location *al) 1637 { 1638 al->sym = NULL; 1639 if (thread__find_map(thread, cpumode, addr, al)) 1640 al->sym = map__find_symbol(al->map, al->addr); 1641 return al->sym; 1642 } 1643 1644 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode, 1645 u64 addr, struct addr_location *al) 1646 { 1647 al->sym = NULL; 1648 if (thread__find_map_fb(thread, cpumode, addr, al)) 1649 al->sym = map__find_symbol(al->map, al->addr); 1650 return al->sym; 1651 } 1652 1653 /* 1654 * Callers need to drop the reference to al->thread, obtained in 1655 * machine__findnew_thread() 1656 */ 1657 int machine__resolve(struct machine *machine, struct addr_location *al, 1658 struct perf_sample *sample) 1659 { 1660 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1661 sample->tid); 1662 1663 if (thread == NULL) 1664 return -1; 1665 1666 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1667 thread__find_map(thread, sample->cpumode, sample->ip, al); 1668 dump_printf(" ...... dso: %s\n", 1669 al->map ? al->map->dso->long_name : 1670 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1671 1672 if (thread__is_filtered(thread)) 1673 al->filtered |= (1 << HIST_FILTER__THREAD); 1674 1675 al->sym = NULL; 1676 al->cpu = sample->cpu; 1677 al->socket = -1; 1678 al->srcline = NULL; 1679 1680 if (al->cpu >= 0) { 1681 struct perf_env *env = machine->env; 1682 1683 if (env && env->cpu) 1684 al->socket = env->cpu[al->cpu].socket_id; 1685 } 1686 1687 if (al->map) { 1688 struct dso *dso = al->map->dso; 1689 1690 if (symbol_conf.dso_list && 1691 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1692 dso->short_name) || 1693 (dso->short_name != dso->long_name && 1694 strlist__has_entry(symbol_conf.dso_list, 1695 dso->long_name))))) { 1696 al->filtered |= (1 << HIST_FILTER__DSO); 1697 } 1698 1699 al->sym = map__find_symbol(al->map, al->addr); 1700 } 1701 1702 if (symbol_conf.sym_list && 1703 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1704 al->sym->name))) { 1705 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1706 } 1707 1708 return 0; 1709 } 1710 1711 /* 1712 * The preprocess_sample method will return with reference counts for the 1713 * in it, when done using (and perhaps getting ref counts if needing to 1714 * keep a pointer to one of those entries) it must be paired with 1715 * addr_location__put(), so that the refcounts can be decremented. 1716 */ 1717 void addr_location__put(struct addr_location *al) 1718 { 1719 thread__zput(al->thread); 1720 } 1721 1722 bool is_bts_event(struct perf_event_attr *attr) 1723 { 1724 return attr->type == PERF_TYPE_HARDWARE && 1725 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1726 attr->sample_period == 1; 1727 } 1728 1729 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1730 { 1731 if (attr->type == PERF_TYPE_SOFTWARE && 1732 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1733 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1734 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1735 return true; 1736 1737 if (is_bts_event(attr)) 1738 return true; 1739 1740 return false; 1741 } 1742 1743 void thread__resolve(struct thread *thread, struct addr_location *al, 1744 struct perf_sample *sample) 1745 { 1746 thread__find_map_fb(thread, sample->cpumode, sample->addr, al); 1747 1748 al->cpu = sample->cpu; 1749 al->sym = NULL; 1750 1751 if (al->map) 1752 al->sym = map__find_symbol(al->map, al->addr); 1753 } 1754