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