1 // SPDX-License-Identifier: GPL-2.0 2 #include <dirent.h> 3 #include <errno.h> 4 #include <fcntl.h> 5 #include <inttypes.h> 6 #include <linux/kernel.h> 7 #include <linux/types.h> 8 #include <sys/types.h> 9 #include <sys/stat.h> 10 #include <unistd.h> 11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */ 12 #include <api/fs/fs.h> 13 #include <linux/perf_event.h> 14 #include "event.h" 15 #include "debug.h" 16 #include "hist.h" 17 #include "machine.h" 18 #include "sort.h" 19 #include "string2.h" 20 #include "strlist.h" 21 #include "thread.h" 22 #include "thread_map.h" 23 #include <linux/ctype.h> 24 #include "map.h" 25 #include "symbol.h" 26 #include "symbol/kallsyms.h" 27 #include "asm/bug.h" 28 #include "stat.h" 29 #include "session.h" 30 #include "bpf-event.h" 31 32 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500 33 34 static const char *perf_event__names[] = { 35 [0] = "TOTAL", 36 [PERF_RECORD_MMAP] = "MMAP", 37 [PERF_RECORD_MMAP2] = "MMAP2", 38 [PERF_RECORD_LOST] = "LOST", 39 [PERF_RECORD_COMM] = "COMM", 40 [PERF_RECORD_EXIT] = "EXIT", 41 [PERF_RECORD_THROTTLE] = "THROTTLE", 42 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 43 [PERF_RECORD_FORK] = "FORK", 44 [PERF_RECORD_READ] = "READ", 45 [PERF_RECORD_SAMPLE] = "SAMPLE", 46 [PERF_RECORD_AUX] = "AUX", 47 [PERF_RECORD_ITRACE_START] = "ITRACE_START", 48 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES", 49 [PERF_RECORD_SWITCH] = "SWITCH", 50 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE", 51 [PERF_RECORD_NAMESPACES] = "NAMESPACES", 52 [PERF_RECORD_KSYMBOL] = "KSYMBOL", 53 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT", 54 [PERF_RECORD_HEADER_ATTR] = "ATTR", 55 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 56 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 57 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 58 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 59 [PERF_RECORD_ID_INDEX] = "ID_INDEX", 60 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO", 61 [PERF_RECORD_AUXTRACE] = "AUXTRACE", 62 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR", 63 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP", 64 [PERF_RECORD_CPU_MAP] = "CPU_MAP", 65 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG", 66 [PERF_RECORD_STAT] = "STAT", 67 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND", 68 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE", 69 [PERF_RECORD_TIME_CONV] = "TIME_CONV", 70 [PERF_RECORD_HEADER_FEATURE] = "FEATURE", 71 [PERF_RECORD_COMPRESSED] = "COMPRESSED", 72 }; 73 74 static const char *perf_ns__names[] = { 75 [NET_NS_INDEX] = "net", 76 [UTS_NS_INDEX] = "uts", 77 [IPC_NS_INDEX] = "ipc", 78 [PID_NS_INDEX] = "pid", 79 [USER_NS_INDEX] = "user", 80 [MNT_NS_INDEX] = "mnt", 81 [CGROUP_NS_INDEX] = "cgroup", 82 }; 83 84 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT; 85 86 const char *perf_event__name(unsigned int id) 87 { 88 if (id >= ARRAY_SIZE(perf_event__names)) 89 return "INVALID"; 90 if (!perf_event__names[id]) 91 return "UNKNOWN"; 92 return perf_event__names[id]; 93 } 94 95 static const char *perf_ns__name(unsigned int id) 96 { 97 if (id >= ARRAY_SIZE(perf_ns__names)) 98 return "UNKNOWN"; 99 return perf_ns__names[id]; 100 } 101 102 int perf_tool__process_synth_event(struct perf_tool *tool, 103 union perf_event *event, 104 struct machine *machine, 105 perf_event__handler_t process) 106 { 107 struct perf_sample synth_sample = { 108 .pid = -1, 109 .tid = -1, 110 .time = -1, 111 .stream_id = -1, 112 .cpu = -1, 113 .period = 1, 114 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, 115 }; 116 117 return process(tool, event, &synth_sample, machine); 118 }; 119 120 /* 121 * Assumes that the first 4095 bytes of /proc/pid/stat contains 122 * the comm, tgid and ppid. 123 */ 124 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 125 pid_t *tgid, pid_t *ppid) 126 { 127 char filename[PATH_MAX]; 128 char bf[4096]; 129 int fd; 130 size_t size = 0; 131 ssize_t n; 132 char *name, *tgids, *ppids; 133 134 *tgid = -1; 135 *ppid = -1; 136 137 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 138 139 fd = open(filename, O_RDONLY); 140 if (fd < 0) { 141 pr_debug("couldn't open %s\n", filename); 142 return -1; 143 } 144 145 n = read(fd, bf, sizeof(bf) - 1); 146 close(fd); 147 if (n <= 0) { 148 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 149 pid); 150 return -1; 151 } 152 bf[n] = '\0'; 153 154 name = strstr(bf, "Name:"); 155 tgids = strstr(bf, "Tgid:"); 156 ppids = strstr(bf, "PPid:"); 157 158 if (name) { 159 char *nl; 160 161 name = skip_spaces(name + 5); /* strlen("Name:") */ 162 nl = strchr(name, '\n'); 163 if (nl) 164 *nl = '\0'; 165 166 size = strlen(name); 167 if (size >= len) 168 size = len - 1; 169 memcpy(comm, name, size); 170 comm[size] = '\0'; 171 } else { 172 pr_debug("Name: string not found for pid %d\n", pid); 173 } 174 175 if (tgids) { 176 tgids += 5; /* strlen("Tgid:") */ 177 *tgid = atoi(tgids); 178 } else { 179 pr_debug("Tgid: string not found for pid %d\n", pid); 180 } 181 182 if (ppids) { 183 ppids += 5; /* strlen("PPid:") */ 184 *ppid = atoi(ppids); 185 } else { 186 pr_debug("PPid: string not found for pid %d\n", pid); 187 } 188 189 return 0; 190 } 191 192 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 193 struct machine *machine, 194 pid_t *tgid, pid_t *ppid) 195 { 196 size_t size; 197 198 *ppid = -1; 199 200 memset(&event->comm, 0, sizeof(event->comm)); 201 202 if (machine__is_host(machine)) { 203 if (perf_event__get_comm_ids(pid, event->comm.comm, 204 sizeof(event->comm.comm), 205 tgid, ppid) != 0) { 206 return -1; 207 } 208 } else { 209 *tgid = machine->pid; 210 } 211 212 if (*tgid < 0) 213 return -1; 214 215 event->comm.pid = *tgid; 216 event->comm.header.type = PERF_RECORD_COMM; 217 218 size = strlen(event->comm.comm) + 1; 219 size = PERF_ALIGN(size, sizeof(u64)); 220 memset(event->comm.comm + size, 0, machine->id_hdr_size); 221 event->comm.header.size = (sizeof(event->comm) - 222 (sizeof(event->comm.comm) - size) + 223 machine->id_hdr_size); 224 event->comm.tid = pid; 225 226 return 0; 227 } 228 229 pid_t perf_event__synthesize_comm(struct perf_tool *tool, 230 union perf_event *event, pid_t pid, 231 perf_event__handler_t process, 232 struct machine *machine) 233 { 234 pid_t tgid, ppid; 235 236 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 237 return -1; 238 239 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 240 return -1; 241 242 return tgid; 243 } 244 245 static void perf_event__get_ns_link_info(pid_t pid, const char *ns, 246 struct perf_ns_link_info *ns_link_info) 247 { 248 struct stat64 st; 249 char proc_ns[128]; 250 251 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns); 252 if (stat64(proc_ns, &st) == 0) { 253 ns_link_info->dev = st.st_dev; 254 ns_link_info->ino = st.st_ino; 255 } 256 } 257 258 int perf_event__synthesize_namespaces(struct perf_tool *tool, 259 union perf_event *event, 260 pid_t pid, pid_t tgid, 261 perf_event__handler_t process, 262 struct machine *machine) 263 { 264 u32 idx; 265 struct perf_ns_link_info *ns_link_info; 266 267 if (!tool || !tool->namespace_events) 268 return 0; 269 270 memset(&event->namespaces, 0, (sizeof(event->namespaces) + 271 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 272 machine->id_hdr_size)); 273 274 event->namespaces.pid = tgid; 275 event->namespaces.tid = pid; 276 277 event->namespaces.nr_namespaces = NR_NAMESPACES; 278 279 ns_link_info = event->namespaces.link_info; 280 281 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++) 282 perf_event__get_ns_link_info(pid, perf_ns__name(idx), 283 &ns_link_info[idx]); 284 285 event->namespaces.header.type = PERF_RECORD_NAMESPACES; 286 287 event->namespaces.header.size = (sizeof(event->namespaces) + 288 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 289 machine->id_hdr_size); 290 291 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 292 return -1; 293 294 return 0; 295 } 296 297 static int perf_event__synthesize_fork(struct perf_tool *tool, 298 union perf_event *event, 299 pid_t pid, pid_t tgid, pid_t ppid, 300 perf_event__handler_t process, 301 struct machine *machine) 302 { 303 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 304 305 /* 306 * for main thread set parent to ppid from status file. For other 307 * threads set parent pid to main thread. ie., assume main thread 308 * spawns all threads in a process 309 */ 310 if (tgid == pid) { 311 event->fork.ppid = ppid; 312 event->fork.ptid = ppid; 313 } else { 314 event->fork.ppid = tgid; 315 event->fork.ptid = tgid; 316 } 317 event->fork.pid = tgid; 318 event->fork.tid = pid; 319 event->fork.header.type = PERF_RECORD_FORK; 320 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC; 321 322 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 323 324 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 325 return -1; 326 327 return 0; 328 } 329 330 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 331 union perf_event *event, 332 pid_t pid, pid_t tgid, 333 perf_event__handler_t process, 334 struct machine *machine, 335 bool mmap_data) 336 { 337 char filename[PATH_MAX]; 338 FILE *fp; 339 unsigned long long t; 340 bool truncation = false; 341 unsigned long long timeout = proc_map_timeout * 1000000ULL; 342 int rc = 0; 343 const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); 344 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; 345 346 if (machine__is_default_guest(machine)) 347 return 0; 348 349 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps", 350 machine->root_dir, pid, pid); 351 352 fp = fopen(filename, "r"); 353 if (fp == NULL) { 354 /* 355 * We raced with a task exiting - just return: 356 */ 357 pr_debug("couldn't open %s\n", filename); 358 return -1; 359 } 360 361 event->header.type = PERF_RECORD_MMAP2; 362 t = rdclock(); 363 364 while (1) { 365 char bf[BUFSIZ]; 366 char prot[5]; 367 char execname[PATH_MAX]; 368 char anonstr[] = "//anon"; 369 unsigned int ino; 370 size_t size; 371 ssize_t n; 372 373 if (fgets(bf, sizeof(bf), fp) == NULL) 374 break; 375 376 if ((rdclock() - t) > timeout) { 377 pr_warning("Reading %s time out. " 378 "You may want to increase " 379 "the time limit by --proc-map-timeout\n", 380 filename); 381 truncation = true; 382 goto out; 383 } 384 385 /* ensure null termination since stack will be reused. */ 386 strcpy(execname, ""); 387 388 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 389 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n", 390 &event->mmap2.start, &event->mmap2.len, prot, 391 &event->mmap2.pgoff, &event->mmap2.maj, 392 &event->mmap2.min, 393 &ino, execname); 394 395 /* 396 * Anon maps don't have the execname. 397 */ 398 if (n < 7) 399 continue; 400 401 event->mmap2.ino = (u64)ino; 402 403 /* 404 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 405 */ 406 if (machine__is_host(machine)) 407 event->header.misc = PERF_RECORD_MISC_USER; 408 else 409 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 410 411 /* map protection and flags bits */ 412 event->mmap2.prot = 0; 413 event->mmap2.flags = 0; 414 if (prot[0] == 'r') 415 event->mmap2.prot |= PROT_READ; 416 if (prot[1] == 'w') 417 event->mmap2.prot |= PROT_WRITE; 418 if (prot[2] == 'x') 419 event->mmap2.prot |= PROT_EXEC; 420 421 if (prot[3] == 's') 422 event->mmap2.flags |= MAP_SHARED; 423 else 424 event->mmap2.flags |= MAP_PRIVATE; 425 426 if (prot[2] != 'x') { 427 if (!mmap_data || prot[0] != 'r') 428 continue; 429 430 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 431 } 432 433 out: 434 if (truncation) 435 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; 436 437 if (!strcmp(execname, "")) 438 strcpy(execname, anonstr); 439 440 if (hugetlbfs_mnt_len && 441 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { 442 strcpy(execname, anonstr); 443 event->mmap2.flags |= MAP_HUGETLB; 444 } 445 446 size = strlen(execname) + 1; 447 memcpy(event->mmap2.filename, execname, size); 448 size = PERF_ALIGN(size, sizeof(u64)); 449 event->mmap2.len -= event->mmap.start; 450 event->mmap2.header.size = (sizeof(event->mmap2) - 451 (sizeof(event->mmap2.filename) - size)); 452 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 453 event->mmap2.header.size += machine->id_hdr_size; 454 event->mmap2.pid = tgid; 455 event->mmap2.tid = pid; 456 457 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 458 rc = -1; 459 break; 460 } 461 462 if (truncation) 463 break; 464 } 465 466 fclose(fp); 467 return rc; 468 } 469 470 int perf_event__synthesize_modules(struct perf_tool *tool, 471 perf_event__handler_t process, 472 struct machine *machine) 473 { 474 int rc = 0; 475 struct map *pos; 476 struct maps *maps = machine__kernel_maps(machine); 477 union perf_event *event = zalloc((sizeof(event->mmap) + 478 machine->id_hdr_size)); 479 if (event == NULL) { 480 pr_debug("Not enough memory synthesizing mmap event " 481 "for kernel modules\n"); 482 return -1; 483 } 484 485 event->header.type = PERF_RECORD_MMAP; 486 487 /* 488 * kernel uses 0 for user space maps, see kernel/perf_event.c 489 * __perf_event_mmap 490 */ 491 if (machine__is_host(machine)) 492 event->header.misc = PERF_RECORD_MISC_KERNEL; 493 else 494 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 495 496 for (pos = maps__first(maps); pos; pos = map__next(pos)) { 497 size_t size; 498 499 if (!__map__is_kmodule(pos)) 500 continue; 501 502 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 503 event->mmap.header.type = PERF_RECORD_MMAP; 504 event->mmap.header.size = (sizeof(event->mmap) - 505 (sizeof(event->mmap.filename) - size)); 506 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 507 event->mmap.header.size += machine->id_hdr_size; 508 event->mmap.start = pos->start; 509 event->mmap.len = pos->end - pos->start; 510 event->mmap.pid = machine->pid; 511 512 memcpy(event->mmap.filename, pos->dso->long_name, 513 pos->dso->long_name_len + 1); 514 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 515 rc = -1; 516 break; 517 } 518 } 519 520 free(event); 521 return rc; 522 } 523 524 static int __event__synthesize_thread(union perf_event *comm_event, 525 union perf_event *mmap_event, 526 union perf_event *fork_event, 527 union perf_event *namespaces_event, 528 pid_t pid, int full, 529 perf_event__handler_t process, 530 struct perf_tool *tool, 531 struct machine *machine, 532 bool mmap_data) 533 { 534 char filename[PATH_MAX]; 535 DIR *tasks; 536 struct dirent *dirent; 537 pid_t tgid, ppid; 538 int rc = 0; 539 540 /* special case: only send one comm event using passed in pid */ 541 if (!full) { 542 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 543 process, machine); 544 545 if (tgid == -1) 546 return -1; 547 548 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid, 549 tgid, process, machine) < 0) 550 return -1; 551 552 /* 553 * send mmap only for thread group leader 554 * see thread__init_map_groups 555 */ 556 if (pid == tgid && 557 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 558 process, machine, mmap_data)) 559 return -1; 560 561 return 0; 562 } 563 564 if (machine__is_default_guest(machine)) 565 return 0; 566 567 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 568 machine->root_dir, pid); 569 570 tasks = opendir(filename); 571 if (tasks == NULL) { 572 pr_debug("couldn't open %s\n", filename); 573 return 0; 574 } 575 576 while ((dirent = readdir(tasks)) != NULL) { 577 char *end; 578 pid_t _pid; 579 580 _pid = strtol(dirent->d_name, &end, 10); 581 if (*end) 582 continue; 583 584 rc = -1; 585 if (perf_event__prepare_comm(comm_event, _pid, machine, 586 &tgid, &ppid) != 0) 587 break; 588 589 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 590 ppid, process, machine) < 0) 591 break; 592 593 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid, 594 tgid, process, machine) < 0) 595 break; 596 597 /* 598 * Send the prepared comm event 599 */ 600 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) 601 break; 602 603 rc = 0; 604 if (_pid == pid) { 605 /* process the parent's maps too */ 606 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 607 process, machine, mmap_data); 608 if (rc) 609 break; 610 } 611 } 612 613 closedir(tasks); 614 return rc; 615 } 616 617 int perf_event__synthesize_thread_map(struct perf_tool *tool, 618 struct thread_map *threads, 619 perf_event__handler_t process, 620 struct machine *machine, 621 bool mmap_data) 622 { 623 union perf_event *comm_event, *mmap_event, *fork_event; 624 union perf_event *namespaces_event; 625 int err = -1, thread, j; 626 627 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 628 if (comm_event == NULL) 629 goto out; 630 631 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 632 if (mmap_event == NULL) 633 goto out_free_comm; 634 635 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 636 if (fork_event == NULL) 637 goto out_free_mmap; 638 639 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 640 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 641 machine->id_hdr_size); 642 if (namespaces_event == NULL) 643 goto out_free_fork; 644 645 err = 0; 646 for (thread = 0; thread < threads->nr; ++thread) { 647 if (__event__synthesize_thread(comm_event, mmap_event, 648 fork_event, namespaces_event, 649 thread_map__pid(threads, thread), 0, 650 process, tool, machine, 651 mmap_data)) { 652 err = -1; 653 break; 654 } 655 656 /* 657 * comm.pid is set to thread group id by 658 * perf_event__synthesize_comm 659 */ 660 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) { 661 bool need_leader = true; 662 663 /* is thread group leader in thread_map? */ 664 for (j = 0; j < threads->nr; ++j) { 665 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) { 666 need_leader = false; 667 break; 668 } 669 } 670 671 /* if not, generate events for it */ 672 if (need_leader && 673 __event__synthesize_thread(comm_event, mmap_event, 674 fork_event, namespaces_event, 675 comm_event->comm.pid, 0, 676 process, tool, machine, 677 mmap_data)) { 678 err = -1; 679 break; 680 } 681 } 682 } 683 free(namespaces_event); 684 out_free_fork: 685 free(fork_event); 686 out_free_mmap: 687 free(mmap_event); 688 out_free_comm: 689 free(comm_event); 690 out: 691 return err; 692 } 693 694 static int __perf_event__synthesize_threads(struct perf_tool *tool, 695 perf_event__handler_t process, 696 struct machine *machine, 697 bool mmap_data, 698 struct dirent **dirent, 699 int start, 700 int num) 701 { 702 union perf_event *comm_event, *mmap_event, *fork_event; 703 union perf_event *namespaces_event; 704 int err = -1; 705 char *end; 706 pid_t pid; 707 int i; 708 709 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 710 if (comm_event == NULL) 711 goto out; 712 713 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 714 if (mmap_event == NULL) 715 goto out_free_comm; 716 717 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 718 if (fork_event == NULL) 719 goto out_free_mmap; 720 721 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 722 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 723 machine->id_hdr_size); 724 if (namespaces_event == NULL) 725 goto out_free_fork; 726 727 for (i = start; i < start + num; i++) { 728 if (!isdigit(dirent[i]->d_name[0])) 729 continue; 730 731 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); 732 /* only interested in proper numerical dirents */ 733 if (*end) 734 continue; 735 /* 736 * We may race with exiting thread, so don't stop just because 737 * one thread couldn't be synthesized. 738 */ 739 __event__synthesize_thread(comm_event, mmap_event, fork_event, 740 namespaces_event, pid, 1, process, 741 tool, machine, mmap_data); 742 } 743 err = 0; 744 745 free(namespaces_event); 746 out_free_fork: 747 free(fork_event); 748 out_free_mmap: 749 free(mmap_event); 750 out_free_comm: 751 free(comm_event); 752 out: 753 return err; 754 } 755 756 struct synthesize_threads_arg { 757 struct perf_tool *tool; 758 perf_event__handler_t process; 759 struct machine *machine; 760 bool mmap_data; 761 struct dirent **dirent; 762 int num; 763 int start; 764 }; 765 766 static void *synthesize_threads_worker(void *arg) 767 { 768 struct synthesize_threads_arg *args = arg; 769 770 __perf_event__synthesize_threads(args->tool, args->process, 771 args->machine, args->mmap_data, 772 args->dirent, 773 args->start, args->num); 774 return NULL; 775 } 776 777 int perf_event__synthesize_threads(struct perf_tool *tool, 778 perf_event__handler_t process, 779 struct machine *machine, 780 bool mmap_data, 781 unsigned int nr_threads_synthesize) 782 { 783 struct synthesize_threads_arg *args = NULL; 784 pthread_t *synthesize_threads = NULL; 785 char proc_path[PATH_MAX]; 786 struct dirent **dirent; 787 int num_per_thread; 788 int m, n, i, j; 789 int thread_nr; 790 int base = 0; 791 int err = -1; 792 793 794 if (machine__is_default_guest(machine)) 795 return 0; 796 797 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 798 n = scandir(proc_path, &dirent, 0, alphasort); 799 if (n < 0) 800 return err; 801 802 if (nr_threads_synthesize == UINT_MAX) 803 thread_nr = sysconf(_SC_NPROCESSORS_ONLN); 804 else 805 thread_nr = nr_threads_synthesize; 806 807 if (thread_nr <= 1) { 808 err = __perf_event__synthesize_threads(tool, process, 809 machine, mmap_data, 810 dirent, base, n); 811 goto free_dirent; 812 } 813 if (thread_nr > n) 814 thread_nr = n; 815 816 synthesize_threads = calloc(sizeof(pthread_t), thread_nr); 817 if (synthesize_threads == NULL) 818 goto free_dirent; 819 820 args = calloc(sizeof(*args), thread_nr); 821 if (args == NULL) 822 goto free_threads; 823 824 num_per_thread = n / thread_nr; 825 m = n % thread_nr; 826 for (i = 0; i < thread_nr; i++) { 827 args[i].tool = tool; 828 args[i].process = process; 829 args[i].machine = machine; 830 args[i].mmap_data = mmap_data; 831 args[i].dirent = dirent; 832 } 833 for (i = 0; i < m; i++) { 834 args[i].num = num_per_thread + 1; 835 args[i].start = i * args[i].num; 836 } 837 if (i != 0) 838 base = args[i-1].start + args[i-1].num; 839 for (j = i; j < thread_nr; j++) { 840 args[j].num = num_per_thread; 841 args[j].start = base + (j - i) * args[i].num; 842 } 843 844 for (i = 0; i < thread_nr; i++) { 845 if (pthread_create(&synthesize_threads[i], NULL, 846 synthesize_threads_worker, &args[i])) 847 goto out_join; 848 } 849 err = 0; 850 out_join: 851 for (i = 0; i < thread_nr; i++) 852 pthread_join(synthesize_threads[i], NULL); 853 free(args); 854 free_threads: 855 free(synthesize_threads); 856 free_dirent: 857 for (i = 0; i < n; i++) 858 free(dirent[i]); 859 free(dirent); 860 861 return err; 862 } 863 864 struct process_symbol_args { 865 const char *name; 866 u64 start; 867 }; 868 869 static int find_symbol_cb(void *arg, const char *name, char type, 870 u64 start) 871 { 872 struct process_symbol_args *args = arg; 873 874 /* 875 * Must be a function or at least an alias, as in PARISC64, where "_text" is 876 * an 'A' to the same address as "_stext". 877 */ 878 if (!(kallsyms__is_function(type) || 879 type == 'A') || strcmp(name, args->name)) 880 return 0; 881 882 args->start = start; 883 return 1; 884 } 885 886 int kallsyms__get_function_start(const char *kallsyms_filename, 887 const char *symbol_name, u64 *addr) 888 { 889 struct process_symbol_args args = { .name = symbol_name, }; 890 891 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 892 return -1; 893 894 *addr = args.start; 895 return 0; 896 } 897 898 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused, 899 perf_event__handler_t process __maybe_unused, 900 struct machine *machine __maybe_unused) 901 { 902 return 0; 903 } 904 905 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 906 perf_event__handler_t process, 907 struct machine *machine) 908 { 909 size_t size; 910 struct map *map = machine__kernel_map(machine); 911 struct kmap *kmap; 912 int err; 913 union perf_event *event; 914 915 if (symbol_conf.kptr_restrict) 916 return -1; 917 if (map == NULL) 918 return -1; 919 920 /* 921 * We should get this from /sys/kernel/sections/.text, but till that is 922 * available use this, and after it is use this as a fallback for older 923 * kernels. 924 */ 925 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 926 if (event == NULL) { 927 pr_debug("Not enough memory synthesizing mmap event " 928 "for kernel modules\n"); 929 return -1; 930 } 931 932 if (machine__is_host(machine)) { 933 /* 934 * kernel uses PERF_RECORD_MISC_USER for user space maps, 935 * see kernel/perf_event.c __perf_event_mmap 936 */ 937 event->header.misc = PERF_RECORD_MISC_KERNEL; 938 } else { 939 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 940 } 941 942 kmap = map__kmap(map); 943 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 944 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; 945 size = PERF_ALIGN(size, sizeof(u64)); 946 event->mmap.header.type = PERF_RECORD_MMAP; 947 event->mmap.header.size = (sizeof(event->mmap) - 948 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 949 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 950 event->mmap.start = map->start; 951 event->mmap.len = map->end - event->mmap.start; 952 event->mmap.pid = machine->pid; 953 954 err = perf_tool__process_synth_event(tool, event, machine, process); 955 free(event); 956 957 return err; 958 } 959 960 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 961 perf_event__handler_t process, 962 struct machine *machine) 963 { 964 int err; 965 966 err = __perf_event__synthesize_kernel_mmap(tool, process, machine); 967 if (err < 0) 968 return err; 969 970 return perf_event__synthesize_extra_kmaps(tool, process, machine); 971 } 972 973 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 974 struct thread_map *threads, 975 perf_event__handler_t process, 976 struct machine *machine) 977 { 978 union perf_event *event; 979 int i, err, size; 980 981 size = sizeof(event->thread_map); 982 size += threads->nr * sizeof(event->thread_map.entries[0]); 983 984 event = zalloc(size); 985 if (!event) 986 return -ENOMEM; 987 988 event->header.type = PERF_RECORD_THREAD_MAP; 989 event->header.size = size; 990 event->thread_map.nr = threads->nr; 991 992 for (i = 0; i < threads->nr; i++) { 993 struct thread_map_event_entry *entry = &event->thread_map.entries[i]; 994 char *comm = thread_map__comm(threads, i); 995 996 if (!comm) 997 comm = (char *) ""; 998 999 entry->pid = thread_map__pid(threads, i); 1000 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 1001 } 1002 1003 err = process(tool, event, NULL, machine); 1004 1005 free(event); 1006 return err; 1007 } 1008 1009 static void synthesize_cpus(struct cpu_map_entries *cpus, 1010 struct cpu_map *map) 1011 { 1012 int i; 1013 1014 cpus->nr = map->nr; 1015 1016 for (i = 0; i < map->nr; i++) 1017 cpus->cpu[i] = map->map[i]; 1018 } 1019 1020 static void synthesize_mask(struct cpu_map_mask *mask, 1021 struct cpu_map *map, int max) 1022 { 1023 int i; 1024 1025 mask->nr = BITS_TO_LONGS(max); 1026 mask->long_size = sizeof(long); 1027 1028 for (i = 0; i < map->nr; i++) 1029 set_bit(map->map[i], mask->mask); 1030 } 1031 1032 static size_t cpus_size(struct cpu_map *map) 1033 { 1034 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 1035 } 1036 1037 static size_t mask_size(struct cpu_map *map, int *max) 1038 { 1039 int i; 1040 1041 *max = 0; 1042 1043 for (i = 0; i < map->nr; i++) { 1044 /* bit possition of the cpu is + 1 */ 1045 int bit = map->map[i] + 1; 1046 1047 if (bit > *max) 1048 *max = bit; 1049 } 1050 1051 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long); 1052 } 1053 1054 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max) 1055 { 1056 size_t size_cpus, size_mask; 1057 bool is_dummy = cpu_map__empty(map); 1058 1059 /* 1060 * Both array and mask data have variable size based 1061 * on the number of cpus and their actual values. 1062 * The size of the 'struct cpu_map_data' is: 1063 * 1064 * array = size of 'struct cpu_map_entries' + 1065 * number of cpus * sizeof(u64) 1066 * 1067 * mask = size of 'struct cpu_map_mask' + 1068 * maximum cpu bit converted to size of longs 1069 * 1070 * and finaly + the size of 'struct cpu_map_data'. 1071 */ 1072 size_cpus = cpus_size(map); 1073 size_mask = mask_size(map, max); 1074 1075 if (is_dummy || (size_cpus < size_mask)) { 1076 *size += size_cpus; 1077 *type = PERF_CPU_MAP__CPUS; 1078 } else { 1079 *size += size_mask; 1080 *type = PERF_CPU_MAP__MASK; 1081 } 1082 1083 *size += sizeof(struct cpu_map_data); 1084 *size = PERF_ALIGN(*size, sizeof(u64)); 1085 return zalloc(*size); 1086 } 1087 1088 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map, 1089 u16 type, int max) 1090 { 1091 data->type = type; 1092 1093 switch (type) { 1094 case PERF_CPU_MAP__CPUS: 1095 synthesize_cpus((struct cpu_map_entries *) data->data, map); 1096 break; 1097 case PERF_CPU_MAP__MASK: 1098 synthesize_mask((struct cpu_map_mask *) data->data, map, max); 1099 default: 1100 break; 1101 }; 1102 } 1103 1104 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map) 1105 { 1106 size_t size = sizeof(struct cpu_map_event); 1107 struct cpu_map_event *event; 1108 int max; 1109 u16 type; 1110 1111 event = cpu_map_data__alloc(map, &size, &type, &max); 1112 if (!event) 1113 return NULL; 1114 1115 event->header.type = PERF_RECORD_CPU_MAP; 1116 event->header.size = size; 1117 event->data.type = type; 1118 1119 cpu_map_data__synthesize(&event->data, map, type, max); 1120 return event; 1121 } 1122 1123 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 1124 struct cpu_map *map, 1125 perf_event__handler_t process, 1126 struct machine *machine) 1127 { 1128 struct cpu_map_event *event; 1129 int err; 1130 1131 event = cpu_map_event__new(map); 1132 if (!event) 1133 return -ENOMEM; 1134 1135 err = process(tool, (union perf_event *) event, NULL, machine); 1136 1137 free(event); 1138 return err; 1139 } 1140 1141 int perf_event__synthesize_stat_config(struct perf_tool *tool, 1142 struct perf_stat_config *config, 1143 perf_event__handler_t process, 1144 struct machine *machine) 1145 { 1146 struct stat_config_event *event; 1147 int size, i = 0, err; 1148 1149 size = sizeof(*event); 1150 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 1151 1152 event = zalloc(size); 1153 if (!event) 1154 return -ENOMEM; 1155 1156 event->header.type = PERF_RECORD_STAT_CONFIG; 1157 event->header.size = size; 1158 event->nr = PERF_STAT_CONFIG_TERM__MAX; 1159 1160 #define ADD(__term, __val) \ 1161 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 1162 event->data[i].val = __val; \ 1163 i++; 1164 1165 ADD(AGGR_MODE, config->aggr_mode) 1166 ADD(INTERVAL, config->interval) 1167 ADD(SCALE, config->scale) 1168 1169 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 1170 "stat config terms unbalanced\n"); 1171 #undef ADD 1172 1173 err = process(tool, (union perf_event *) event, NULL, machine); 1174 1175 free(event); 1176 return err; 1177 } 1178 1179 int perf_event__synthesize_stat(struct perf_tool *tool, 1180 u32 cpu, u32 thread, u64 id, 1181 struct perf_counts_values *count, 1182 perf_event__handler_t process, 1183 struct machine *machine) 1184 { 1185 struct stat_event event; 1186 1187 event.header.type = PERF_RECORD_STAT; 1188 event.header.size = sizeof(event); 1189 event.header.misc = 0; 1190 1191 event.id = id; 1192 event.cpu = cpu; 1193 event.thread = thread; 1194 event.val = count->val; 1195 event.ena = count->ena; 1196 event.run = count->run; 1197 1198 return process(tool, (union perf_event *) &event, NULL, machine); 1199 } 1200 1201 int perf_event__synthesize_stat_round(struct perf_tool *tool, 1202 u64 evtime, u64 type, 1203 perf_event__handler_t process, 1204 struct machine *machine) 1205 { 1206 struct stat_round_event event; 1207 1208 event.header.type = PERF_RECORD_STAT_ROUND; 1209 event.header.size = sizeof(event); 1210 event.header.misc = 0; 1211 1212 event.time = evtime; 1213 event.type = type; 1214 1215 return process(tool, (union perf_event *) &event, NULL, machine); 1216 } 1217 1218 void perf_event__read_stat_config(struct perf_stat_config *config, 1219 struct stat_config_event *event) 1220 { 1221 unsigned i; 1222 1223 for (i = 0; i < event->nr; i++) { 1224 1225 switch (event->data[i].tag) { 1226 #define CASE(__term, __val) \ 1227 case PERF_STAT_CONFIG_TERM__##__term: \ 1228 config->__val = event->data[i].val; \ 1229 break; 1230 1231 CASE(AGGR_MODE, aggr_mode) 1232 CASE(SCALE, scale) 1233 CASE(INTERVAL, interval) 1234 #undef CASE 1235 default: 1236 pr_warning("unknown stat config term %" PRIu64 "\n", 1237 event->data[i].tag); 1238 } 1239 } 1240 } 1241 1242 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 1243 { 1244 const char *s; 1245 1246 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 1247 s = " exec"; 1248 else 1249 s = ""; 1250 1251 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 1252 } 1253 1254 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp) 1255 { 1256 size_t ret = 0; 1257 struct perf_ns_link_info *ns_link_info; 1258 u32 nr_namespaces, idx; 1259 1260 ns_link_info = event->namespaces.link_info; 1261 nr_namespaces = event->namespaces.nr_namespaces; 1262 1263 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[", 1264 event->namespaces.pid, 1265 event->namespaces.tid, 1266 nr_namespaces); 1267 1268 for (idx = 0; idx < nr_namespaces; idx++) { 1269 if (idx && (idx % 4 == 0)) 1270 ret += fprintf(fp, "\n\t\t "); 1271 1272 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx, 1273 perf_ns__name(idx), (u64)ns_link_info[idx].dev, 1274 (u64)ns_link_info[idx].ino, 1275 ((idx + 1) != nr_namespaces) ? ", " : "]\n"); 1276 } 1277 1278 return ret; 1279 } 1280 1281 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 1282 union perf_event *event, 1283 struct perf_sample *sample, 1284 struct machine *machine) 1285 { 1286 return machine__process_comm_event(machine, event, sample); 1287 } 1288 1289 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused, 1290 union perf_event *event, 1291 struct perf_sample *sample, 1292 struct machine *machine) 1293 { 1294 return machine__process_namespaces_event(machine, event, sample); 1295 } 1296 1297 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 1298 union perf_event *event, 1299 struct perf_sample *sample, 1300 struct machine *machine) 1301 { 1302 return machine__process_lost_event(machine, event, sample); 1303 } 1304 1305 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 1306 union perf_event *event, 1307 struct perf_sample *sample __maybe_unused, 1308 struct machine *machine) 1309 { 1310 return machine__process_aux_event(machine, event); 1311 } 1312 1313 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 1314 union perf_event *event, 1315 struct perf_sample *sample __maybe_unused, 1316 struct machine *machine) 1317 { 1318 return machine__process_itrace_start_event(machine, event); 1319 } 1320 1321 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused, 1322 union perf_event *event, 1323 struct perf_sample *sample, 1324 struct machine *machine) 1325 { 1326 return machine__process_lost_samples_event(machine, event, sample); 1327 } 1328 1329 int perf_event__process_switch(struct perf_tool *tool __maybe_unused, 1330 union perf_event *event, 1331 struct perf_sample *sample __maybe_unused, 1332 struct machine *machine) 1333 { 1334 return machine__process_switch_event(machine, event); 1335 } 1336 1337 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused, 1338 union perf_event *event, 1339 struct perf_sample *sample __maybe_unused, 1340 struct machine *machine) 1341 { 1342 return machine__process_ksymbol(machine, event, sample); 1343 } 1344 1345 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused, 1346 union perf_event *event, 1347 struct perf_sample *sample __maybe_unused, 1348 struct machine *machine) 1349 { 1350 return machine__process_bpf_event(machine, event, sample); 1351 } 1352 1353 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 1354 { 1355 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", 1356 event->mmap.pid, event->mmap.tid, event->mmap.start, 1357 event->mmap.len, event->mmap.pgoff, 1358 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 1359 event->mmap.filename); 1360 } 1361 1362 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 1363 { 1364 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 1365 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", 1366 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 1367 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 1368 event->mmap2.min, event->mmap2.ino, 1369 event->mmap2.ino_generation, 1370 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 1371 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 1372 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 1373 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 1374 event->mmap2.filename); 1375 } 1376 1377 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) 1378 { 1379 struct thread_map *threads = thread_map__new_event(&event->thread_map); 1380 size_t ret; 1381 1382 ret = fprintf(fp, " nr: "); 1383 1384 if (threads) 1385 ret += thread_map__fprintf(threads, fp); 1386 else 1387 ret += fprintf(fp, "failed to get threads from event\n"); 1388 1389 thread_map__put(threads); 1390 return ret; 1391 } 1392 1393 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) 1394 { 1395 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); 1396 size_t ret; 1397 1398 ret = fprintf(fp, ": "); 1399 1400 if (cpus) 1401 ret += cpu_map__fprintf(cpus, fp); 1402 else 1403 ret += fprintf(fp, "failed to get cpumap from event\n"); 1404 1405 cpu_map__put(cpus); 1406 return ret; 1407 } 1408 1409 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 1410 union perf_event *event, 1411 struct perf_sample *sample, 1412 struct machine *machine) 1413 { 1414 return machine__process_mmap_event(machine, event, sample); 1415 } 1416 1417 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 1418 union perf_event *event, 1419 struct perf_sample *sample, 1420 struct machine *machine) 1421 { 1422 return machine__process_mmap2_event(machine, event, sample); 1423 } 1424 1425 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 1426 { 1427 return fprintf(fp, "(%d:%d):(%d:%d)\n", 1428 event->fork.pid, event->fork.tid, 1429 event->fork.ppid, event->fork.ptid); 1430 } 1431 1432 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 1433 union perf_event *event, 1434 struct perf_sample *sample, 1435 struct machine *machine) 1436 { 1437 return machine__process_fork_event(machine, event, sample); 1438 } 1439 1440 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 1441 union perf_event *event, 1442 struct perf_sample *sample, 1443 struct machine *machine) 1444 { 1445 return machine__process_exit_event(machine, event, sample); 1446 } 1447 1448 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 1449 { 1450 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n", 1451 event->aux.aux_offset, event->aux.aux_size, 1452 event->aux.flags, 1453 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 1454 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "", 1455 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : ""); 1456 } 1457 1458 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 1459 { 1460 return fprintf(fp, " pid: %u tid: %u\n", 1461 event->itrace_start.pid, event->itrace_start.tid); 1462 } 1463 1464 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) 1465 { 1466 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; 1467 const char *in_out = !out ? "IN " : 1468 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ? 1469 "OUT " : "OUT preempt"; 1470 1471 if (event->header.type == PERF_RECORD_SWITCH) 1472 return fprintf(fp, " %s\n", in_out); 1473 1474 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", 1475 in_out, out ? "next" : "prev", 1476 event->context_switch.next_prev_pid, 1477 event->context_switch.next_prev_tid); 1478 } 1479 1480 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp) 1481 { 1482 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost); 1483 } 1484 1485 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp) 1486 { 1487 return fprintf(fp, " addr %" PRIx64 " len %u type %u flags 0x%x name %s\n", 1488 event->ksymbol_event.addr, event->ksymbol_event.len, 1489 event->ksymbol_event.ksym_type, 1490 event->ksymbol_event.flags, event->ksymbol_event.name); 1491 } 1492 1493 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp) 1494 { 1495 return fprintf(fp, " type %u, flags %u, id %u\n", 1496 event->bpf_event.type, event->bpf_event.flags, 1497 event->bpf_event.id); 1498 } 1499 1500 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 1501 { 1502 size_t ret = fprintf(fp, "PERF_RECORD_%s", 1503 perf_event__name(event->header.type)); 1504 1505 switch (event->header.type) { 1506 case PERF_RECORD_COMM: 1507 ret += perf_event__fprintf_comm(event, fp); 1508 break; 1509 case PERF_RECORD_FORK: 1510 case PERF_RECORD_EXIT: 1511 ret += perf_event__fprintf_task(event, fp); 1512 break; 1513 case PERF_RECORD_MMAP: 1514 ret += perf_event__fprintf_mmap(event, fp); 1515 break; 1516 case PERF_RECORD_NAMESPACES: 1517 ret += perf_event__fprintf_namespaces(event, fp); 1518 break; 1519 case PERF_RECORD_MMAP2: 1520 ret += perf_event__fprintf_mmap2(event, fp); 1521 break; 1522 case PERF_RECORD_AUX: 1523 ret += perf_event__fprintf_aux(event, fp); 1524 break; 1525 case PERF_RECORD_ITRACE_START: 1526 ret += perf_event__fprintf_itrace_start(event, fp); 1527 break; 1528 case PERF_RECORD_SWITCH: 1529 case PERF_RECORD_SWITCH_CPU_WIDE: 1530 ret += perf_event__fprintf_switch(event, fp); 1531 break; 1532 case PERF_RECORD_LOST: 1533 ret += perf_event__fprintf_lost(event, fp); 1534 break; 1535 case PERF_RECORD_KSYMBOL: 1536 ret += perf_event__fprintf_ksymbol(event, fp); 1537 break; 1538 case PERF_RECORD_BPF_EVENT: 1539 ret += perf_event__fprintf_bpf_event(event, fp); 1540 break; 1541 default: 1542 ret += fprintf(fp, "\n"); 1543 } 1544 1545 return ret; 1546 } 1547 1548 int perf_event__process(struct perf_tool *tool __maybe_unused, 1549 union perf_event *event, 1550 struct perf_sample *sample, 1551 struct machine *machine) 1552 { 1553 return machine__process_event(machine, event, sample); 1554 } 1555 1556 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 1557 struct addr_location *al) 1558 { 1559 struct map_groups *mg = thread->mg; 1560 struct machine *machine = mg->machine; 1561 bool load_map = false; 1562 1563 al->machine = machine; 1564 al->thread = thread; 1565 al->addr = addr; 1566 al->cpumode = cpumode; 1567 al->filtered = 0; 1568 1569 if (machine == NULL) { 1570 al->map = NULL; 1571 return NULL; 1572 } 1573 1574 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 1575 al->level = 'k'; 1576 mg = &machine->kmaps; 1577 load_map = true; 1578 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 1579 al->level = '.'; 1580 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 1581 al->level = 'g'; 1582 mg = &machine->kmaps; 1583 load_map = true; 1584 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 1585 al->level = 'u'; 1586 } else { 1587 al->level = 'H'; 1588 al->map = NULL; 1589 1590 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 1591 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 1592 !perf_guest) 1593 al->filtered |= (1 << HIST_FILTER__GUEST); 1594 if ((cpumode == PERF_RECORD_MISC_USER || 1595 cpumode == PERF_RECORD_MISC_KERNEL) && 1596 !perf_host) 1597 al->filtered |= (1 << HIST_FILTER__HOST); 1598 1599 return NULL; 1600 } 1601 1602 al->map = map_groups__find(mg, al->addr); 1603 if (al->map != NULL) { 1604 /* 1605 * Kernel maps might be changed when loading symbols so loading 1606 * must be done prior to using kernel maps. 1607 */ 1608 if (load_map) 1609 map__load(al->map); 1610 al->addr = al->map->map_ip(al->map, al->addr); 1611 } 1612 1613 return al->map; 1614 } 1615 1616 /* 1617 * For branch stacks or branch samples, the sample cpumode might not be correct 1618 * because it applies only to the sample 'ip' and not necessary to 'addr' or 1619 * branch stack addresses. If possible, use a fallback to deal with those cases. 1620 */ 1621 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr, 1622 struct addr_location *al) 1623 { 1624 struct map *map = thread__find_map(thread, cpumode, addr, al); 1625 struct machine *machine = thread->mg->machine; 1626 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr); 1627 1628 if (map || addr_cpumode == cpumode) 1629 return map; 1630 1631 return thread__find_map(thread, addr_cpumode, addr, al); 1632 } 1633 1634 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode, 1635 u64 addr, struct addr_location *al) 1636 { 1637 al->sym = NULL; 1638 if (thread__find_map(thread, cpumode, addr, al)) 1639 al->sym = map__find_symbol(al->map, al->addr); 1640 return al->sym; 1641 } 1642 1643 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode, 1644 u64 addr, struct addr_location *al) 1645 { 1646 al->sym = NULL; 1647 if (thread__find_map_fb(thread, cpumode, addr, al)) 1648 al->sym = map__find_symbol(al->map, al->addr); 1649 return al->sym; 1650 } 1651 1652 /* 1653 * Callers need to drop the reference to al->thread, obtained in 1654 * machine__findnew_thread() 1655 */ 1656 int machine__resolve(struct machine *machine, struct addr_location *al, 1657 struct perf_sample *sample) 1658 { 1659 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1660 sample->tid); 1661 1662 if (thread == NULL) 1663 return -1; 1664 1665 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1666 thread__find_map(thread, sample->cpumode, sample->ip, al); 1667 dump_printf(" ...... dso: %s\n", 1668 al->map ? al->map->dso->long_name : 1669 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1670 1671 if (thread__is_filtered(thread)) 1672 al->filtered |= (1 << HIST_FILTER__THREAD); 1673 1674 al->sym = NULL; 1675 al->cpu = sample->cpu; 1676 al->socket = -1; 1677 al->srcline = NULL; 1678 1679 if (al->cpu >= 0) { 1680 struct perf_env *env = machine->env; 1681 1682 if (env && env->cpu) 1683 al->socket = env->cpu[al->cpu].socket_id; 1684 } 1685 1686 if (al->map) { 1687 struct dso *dso = al->map->dso; 1688 1689 if (symbol_conf.dso_list && 1690 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1691 dso->short_name) || 1692 (dso->short_name != dso->long_name && 1693 strlist__has_entry(symbol_conf.dso_list, 1694 dso->long_name))))) { 1695 al->filtered |= (1 << HIST_FILTER__DSO); 1696 } 1697 1698 al->sym = map__find_symbol(al->map, al->addr); 1699 } 1700 1701 if (symbol_conf.sym_list && 1702 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1703 al->sym->name))) { 1704 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1705 } 1706 1707 return 0; 1708 } 1709 1710 /* 1711 * The preprocess_sample method will return with reference counts for the 1712 * in it, when done using (and perhaps getting ref counts if needing to 1713 * keep a pointer to one of those entries) it must be paired with 1714 * addr_location__put(), so that the refcounts can be decremented. 1715 */ 1716 void addr_location__put(struct addr_location *al) 1717 { 1718 thread__zput(al->thread); 1719 } 1720 1721 bool is_bts_event(struct perf_event_attr *attr) 1722 { 1723 return attr->type == PERF_TYPE_HARDWARE && 1724 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1725 attr->sample_period == 1; 1726 } 1727 1728 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1729 { 1730 if (attr->type == PERF_TYPE_SOFTWARE && 1731 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1732 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1733 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1734 return true; 1735 1736 if (is_bts_event(attr)) 1737 return true; 1738 1739 return false; 1740 } 1741 1742 void thread__resolve(struct thread *thread, struct addr_location *al, 1743 struct perf_sample *sample) 1744 { 1745 thread__find_map_fb(thread, sample->cpumode, sample->addr, al); 1746 1747 al->cpu = sample->cpu; 1748 al->sym = NULL; 1749 1750 if (al->map) 1751 al->sym = map__find_symbol(al->map, al->addr); 1752 } 1753