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