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