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