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 static 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_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 static 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 struct dirent **dirent, 687 int start, 688 int num) 689 { 690 union perf_event *comm_event, *mmap_event, *fork_event; 691 union perf_event *namespaces_event; 692 int err = -1; 693 char *end; 694 pid_t pid; 695 int i; 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 for (i = start; i < start + num; i++) { 716 if (!isdigit(dirent[i]->d_name[0])) 717 continue; 718 719 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); 720 /* only interested in proper numerical dirents */ 721 if (*end) 722 continue; 723 /* 724 * We may race with exiting thread, so don't stop just because 725 * one thread couldn't be synthesized. 726 */ 727 __event__synthesize_thread(comm_event, mmap_event, fork_event, 728 namespaces_event, pid, 1, process, 729 tool, machine, mmap_data, 730 proc_map_timeout); 731 } 732 err = 0; 733 734 free(namespaces_event); 735 out_free_fork: 736 free(fork_event); 737 out_free_mmap: 738 free(mmap_event); 739 out_free_comm: 740 free(comm_event); 741 out: 742 return err; 743 } 744 745 struct synthesize_threads_arg { 746 struct perf_tool *tool; 747 perf_event__handler_t process; 748 struct machine *machine; 749 bool mmap_data; 750 unsigned int proc_map_timeout; 751 struct dirent **dirent; 752 int num; 753 int start; 754 }; 755 756 static void *synthesize_threads_worker(void *arg) 757 { 758 struct synthesize_threads_arg *args = arg; 759 760 __perf_event__synthesize_threads(args->tool, args->process, 761 args->machine, args->mmap_data, 762 args->proc_map_timeout, args->dirent, 763 args->start, args->num); 764 return NULL; 765 } 766 767 int perf_event__synthesize_threads(struct perf_tool *tool, 768 perf_event__handler_t process, 769 struct machine *machine, 770 bool mmap_data, 771 unsigned int proc_map_timeout, 772 unsigned int nr_threads_synthesize) 773 { 774 struct synthesize_threads_arg *args = NULL; 775 pthread_t *synthesize_threads = NULL; 776 char proc_path[PATH_MAX]; 777 struct dirent **dirent; 778 int num_per_thread; 779 int m, n, i, j; 780 int thread_nr; 781 int base = 0; 782 int err = -1; 783 784 785 if (machine__is_default_guest(machine)) 786 return 0; 787 788 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 789 n = scandir(proc_path, &dirent, 0, alphasort); 790 if (n < 0) 791 return err; 792 793 if (nr_threads_synthesize == UINT_MAX) 794 thread_nr = sysconf(_SC_NPROCESSORS_ONLN); 795 else 796 thread_nr = nr_threads_synthesize; 797 798 if (thread_nr <= 1) { 799 err = __perf_event__synthesize_threads(tool, process, 800 machine, mmap_data, 801 proc_map_timeout, 802 dirent, base, n); 803 goto free_dirent; 804 } 805 if (thread_nr > n) 806 thread_nr = n; 807 808 synthesize_threads = calloc(sizeof(pthread_t), thread_nr); 809 if (synthesize_threads == NULL) 810 goto free_dirent; 811 812 args = calloc(sizeof(*args), thread_nr); 813 if (args == NULL) 814 goto free_threads; 815 816 num_per_thread = n / thread_nr; 817 m = n % thread_nr; 818 for (i = 0; i < thread_nr; i++) { 819 args[i].tool = tool; 820 args[i].process = process; 821 args[i].machine = machine; 822 args[i].mmap_data = mmap_data; 823 args[i].proc_map_timeout = proc_map_timeout; 824 args[i].dirent = dirent; 825 } 826 for (i = 0; i < m; i++) { 827 args[i].num = num_per_thread + 1; 828 args[i].start = i * args[i].num; 829 } 830 if (i != 0) 831 base = args[i-1].start + args[i-1].num; 832 for (j = i; j < thread_nr; j++) { 833 args[j].num = num_per_thread; 834 args[j].start = base + (j - i) * args[i].num; 835 } 836 837 for (i = 0; i < thread_nr; i++) { 838 if (pthread_create(&synthesize_threads[i], NULL, 839 synthesize_threads_worker, &args[i])) 840 goto out_join; 841 } 842 err = 0; 843 out_join: 844 for (i = 0; i < thread_nr; i++) 845 pthread_join(synthesize_threads[i], NULL); 846 free(args); 847 free_threads: 848 free(synthesize_threads); 849 free_dirent: 850 for (i = 0; i < n; i++) 851 free(dirent[i]); 852 free(dirent); 853 854 return err; 855 } 856 857 struct process_symbol_args { 858 const char *name; 859 u64 start; 860 }; 861 862 static int find_symbol_cb(void *arg, const char *name, char type, 863 u64 start) 864 { 865 struct process_symbol_args *args = arg; 866 867 /* 868 * Must be a function or at least an alias, as in PARISC64, where "_text" is 869 * an 'A' to the same address as "_stext". 870 */ 871 if (!(symbol_type__is_a(type, MAP__FUNCTION) || 872 type == 'A') || strcmp(name, args->name)) 873 return 0; 874 875 args->start = start; 876 return 1; 877 } 878 879 int kallsyms__get_function_start(const char *kallsyms_filename, 880 const char *symbol_name, u64 *addr) 881 { 882 struct process_symbol_args args = { .name = symbol_name, }; 883 884 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 885 return -1; 886 887 *addr = args.start; 888 return 0; 889 } 890 891 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 892 perf_event__handler_t process, 893 struct machine *machine) 894 { 895 size_t size; 896 struct map *map = machine__kernel_map(machine); 897 struct kmap *kmap; 898 int err; 899 union perf_event *event; 900 901 if (symbol_conf.kptr_restrict) 902 return -1; 903 if (map == NULL) 904 return -1; 905 906 /* 907 * We should get this from /sys/kernel/sections/.text, but till that is 908 * available use this, and after it is use this as a fallback for older 909 * kernels. 910 */ 911 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 912 if (event == NULL) { 913 pr_debug("Not enough memory synthesizing mmap event " 914 "for kernel modules\n"); 915 return -1; 916 } 917 918 if (machine__is_host(machine)) { 919 /* 920 * kernel uses PERF_RECORD_MISC_USER for user space maps, 921 * see kernel/perf_event.c __perf_event_mmap 922 */ 923 event->header.misc = PERF_RECORD_MISC_KERNEL; 924 } else { 925 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 926 } 927 928 kmap = map__kmap(map); 929 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 930 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; 931 size = PERF_ALIGN(size, sizeof(u64)); 932 event->mmap.header.type = PERF_RECORD_MMAP; 933 event->mmap.header.size = (sizeof(event->mmap) - 934 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 935 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 936 event->mmap.start = map->start; 937 event->mmap.len = map->end - event->mmap.start; 938 event->mmap.pid = machine->pid; 939 940 err = perf_tool__process_synth_event(tool, event, machine, process); 941 free(event); 942 943 return err; 944 } 945 946 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 947 struct thread_map *threads, 948 perf_event__handler_t process, 949 struct machine *machine) 950 { 951 union perf_event *event; 952 int i, err, size; 953 954 size = sizeof(event->thread_map); 955 size += threads->nr * sizeof(event->thread_map.entries[0]); 956 957 event = zalloc(size); 958 if (!event) 959 return -ENOMEM; 960 961 event->header.type = PERF_RECORD_THREAD_MAP; 962 event->header.size = size; 963 event->thread_map.nr = threads->nr; 964 965 for (i = 0; i < threads->nr; i++) { 966 struct thread_map_event_entry *entry = &event->thread_map.entries[i]; 967 char *comm = thread_map__comm(threads, i); 968 969 if (!comm) 970 comm = (char *) ""; 971 972 entry->pid = thread_map__pid(threads, i); 973 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 974 } 975 976 err = process(tool, event, NULL, machine); 977 978 free(event); 979 return err; 980 } 981 982 static void synthesize_cpus(struct cpu_map_entries *cpus, 983 struct cpu_map *map) 984 { 985 int i; 986 987 cpus->nr = map->nr; 988 989 for (i = 0; i < map->nr; i++) 990 cpus->cpu[i] = map->map[i]; 991 } 992 993 static void synthesize_mask(struct cpu_map_mask *mask, 994 struct cpu_map *map, int max) 995 { 996 int i; 997 998 mask->nr = BITS_TO_LONGS(max); 999 mask->long_size = sizeof(long); 1000 1001 for (i = 0; i < map->nr; i++) 1002 set_bit(map->map[i], mask->mask); 1003 } 1004 1005 static size_t cpus_size(struct cpu_map *map) 1006 { 1007 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 1008 } 1009 1010 static size_t mask_size(struct cpu_map *map, int *max) 1011 { 1012 int i; 1013 1014 *max = 0; 1015 1016 for (i = 0; i < map->nr; i++) { 1017 /* bit possition of the cpu is + 1 */ 1018 int bit = map->map[i] + 1; 1019 1020 if (bit > *max) 1021 *max = bit; 1022 } 1023 1024 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long); 1025 } 1026 1027 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max) 1028 { 1029 size_t size_cpus, size_mask; 1030 bool is_dummy = cpu_map__empty(map); 1031 1032 /* 1033 * Both array and mask data have variable size based 1034 * on the number of cpus and their actual values. 1035 * The size of the 'struct cpu_map_data' is: 1036 * 1037 * array = size of 'struct cpu_map_entries' + 1038 * number of cpus * sizeof(u64) 1039 * 1040 * mask = size of 'struct cpu_map_mask' + 1041 * maximum cpu bit converted to size of longs 1042 * 1043 * and finaly + the size of 'struct cpu_map_data'. 1044 */ 1045 size_cpus = cpus_size(map); 1046 size_mask = mask_size(map, max); 1047 1048 if (is_dummy || (size_cpus < size_mask)) { 1049 *size += size_cpus; 1050 *type = PERF_CPU_MAP__CPUS; 1051 } else { 1052 *size += size_mask; 1053 *type = PERF_CPU_MAP__MASK; 1054 } 1055 1056 *size += sizeof(struct cpu_map_data); 1057 return zalloc(*size); 1058 } 1059 1060 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map, 1061 u16 type, int max) 1062 { 1063 data->type = type; 1064 1065 switch (type) { 1066 case PERF_CPU_MAP__CPUS: 1067 synthesize_cpus((struct cpu_map_entries *) data->data, map); 1068 break; 1069 case PERF_CPU_MAP__MASK: 1070 synthesize_mask((struct cpu_map_mask *) data->data, map, max); 1071 default: 1072 break; 1073 }; 1074 } 1075 1076 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map) 1077 { 1078 size_t size = sizeof(struct cpu_map_event); 1079 struct cpu_map_event *event; 1080 int max; 1081 u16 type; 1082 1083 event = cpu_map_data__alloc(map, &size, &type, &max); 1084 if (!event) 1085 return NULL; 1086 1087 event->header.type = PERF_RECORD_CPU_MAP; 1088 event->header.size = size; 1089 event->data.type = type; 1090 1091 cpu_map_data__synthesize(&event->data, map, type, max); 1092 return event; 1093 } 1094 1095 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 1096 struct cpu_map *map, 1097 perf_event__handler_t process, 1098 struct machine *machine) 1099 { 1100 struct cpu_map_event *event; 1101 int err; 1102 1103 event = cpu_map_event__new(map); 1104 if (!event) 1105 return -ENOMEM; 1106 1107 err = process(tool, (union perf_event *) event, NULL, machine); 1108 1109 free(event); 1110 return err; 1111 } 1112 1113 int perf_event__synthesize_stat_config(struct perf_tool *tool, 1114 struct perf_stat_config *config, 1115 perf_event__handler_t process, 1116 struct machine *machine) 1117 { 1118 struct stat_config_event *event; 1119 int size, i = 0, err; 1120 1121 size = sizeof(*event); 1122 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 1123 1124 event = zalloc(size); 1125 if (!event) 1126 return -ENOMEM; 1127 1128 event->header.type = PERF_RECORD_STAT_CONFIG; 1129 event->header.size = size; 1130 event->nr = PERF_STAT_CONFIG_TERM__MAX; 1131 1132 #define ADD(__term, __val) \ 1133 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 1134 event->data[i].val = __val; \ 1135 i++; 1136 1137 ADD(AGGR_MODE, config->aggr_mode) 1138 ADD(INTERVAL, config->interval) 1139 ADD(SCALE, config->scale) 1140 1141 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 1142 "stat config terms unbalanced\n"); 1143 #undef ADD 1144 1145 err = process(tool, (union perf_event *) event, NULL, machine); 1146 1147 free(event); 1148 return err; 1149 } 1150 1151 int perf_event__synthesize_stat(struct perf_tool *tool, 1152 u32 cpu, u32 thread, u64 id, 1153 struct perf_counts_values *count, 1154 perf_event__handler_t process, 1155 struct machine *machine) 1156 { 1157 struct stat_event event; 1158 1159 event.header.type = PERF_RECORD_STAT; 1160 event.header.size = sizeof(event); 1161 event.header.misc = 0; 1162 1163 event.id = id; 1164 event.cpu = cpu; 1165 event.thread = thread; 1166 event.val = count->val; 1167 event.ena = count->ena; 1168 event.run = count->run; 1169 1170 return process(tool, (union perf_event *) &event, NULL, machine); 1171 } 1172 1173 int perf_event__synthesize_stat_round(struct perf_tool *tool, 1174 u64 evtime, u64 type, 1175 perf_event__handler_t process, 1176 struct machine *machine) 1177 { 1178 struct stat_round_event event; 1179 1180 event.header.type = PERF_RECORD_STAT_ROUND; 1181 event.header.size = sizeof(event); 1182 event.header.misc = 0; 1183 1184 event.time = evtime; 1185 event.type = type; 1186 1187 return process(tool, (union perf_event *) &event, NULL, machine); 1188 } 1189 1190 void perf_event__read_stat_config(struct perf_stat_config *config, 1191 struct stat_config_event *event) 1192 { 1193 unsigned i; 1194 1195 for (i = 0; i < event->nr; i++) { 1196 1197 switch (event->data[i].tag) { 1198 #define CASE(__term, __val) \ 1199 case PERF_STAT_CONFIG_TERM__##__term: \ 1200 config->__val = event->data[i].val; \ 1201 break; 1202 1203 CASE(AGGR_MODE, aggr_mode) 1204 CASE(SCALE, scale) 1205 CASE(INTERVAL, interval) 1206 #undef CASE 1207 default: 1208 pr_warning("unknown stat config term %" PRIu64 "\n", 1209 event->data[i].tag); 1210 } 1211 } 1212 } 1213 1214 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 1215 { 1216 const char *s; 1217 1218 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 1219 s = " exec"; 1220 else 1221 s = ""; 1222 1223 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 1224 } 1225 1226 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp) 1227 { 1228 size_t ret = 0; 1229 struct perf_ns_link_info *ns_link_info; 1230 u32 nr_namespaces, idx; 1231 1232 ns_link_info = event->namespaces.link_info; 1233 nr_namespaces = event->namespaces.nr_namespaces; 1234 1235 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[", 1236 event->namespaces.pid, 1237 event->namespaces.tid, 1238 nr_namespaces); 1239 1240 for (idx = 0; idx < nr_namespaces; idx++) { 1241 if (idx && (idx % 4 == 0)) 1242 ret += fprintf(fp, "\n\t\t "); 1243 1244 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx, 1245 perf_ns__name(idx), (u64)ns_link_info[idx].dev, 1246 (u64)ns_link_info[idx].ino, 1247 ((idx + 1) != nr_namespaces) ? ", " : "]\n"); 1248 } 1249 1250 return ret; 1251 } 1252 1253 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 1254 union perf_event *event, 1255 struct perf_sample *sample, 1256 struct machine *machine) 1257 { 1258 return machine__process_comm_event(machine, event, sample); 1259 } 1260 1261 int perf_event__process_namespaces(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_namespaces_event(machine, event, sample); 1267 } 1268 1269 int perf_event__process_lost(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_lost_event(machine, event, sample); 1275 } 1276 1277 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 1278 union perf_event *event, 1279 struct perf_sample *sample __maybe_unused, 1280 struct machine *machine) 1281 { 1282 return machine__process_aux_event(machine, event); 1283 } 1284 1285 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 1286 union perf_event *event, 1287 struct perf_sample *sample __maybe_unused, 1288 struct machine *machine) 1289 { 1290 return machine__process_itrace_start_event(machine, event); 1291 } 1292 1293 int perf_event__process_lost_samples(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_lost_samples_event(machine, event, sample); 1299 } 1300 1301 int perf_event__process_switch(struct perf_tool *tool __maybe_unused, 1302 union perf_event *event, 1303 struct perf_sample *sample __maybe_unused, 1304 struct machine *machine) 1305 { 1306 return machine__process_switch_event(machine, event); 1307 } 1308 1309 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 1310 { 1311 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", 1312 event->mmap.pid, event->mmap.tid, event->mmap.start, 1313 event->mmap.len, event->mmap.pgoff, 1314 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 1315 event->mmap.filename); 1316 } 1317 1318 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 1319 { 1320 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 1321 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", 1322 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 1323 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 1324 event->mmap2.min, event->mmap2.ino, 1325 event->mmap2.ino_generation, 1326 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 1327 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 1328 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 1329 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 1330 event->mmap2.filename); 1331 } 1332 1333 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) 1334 { 1335 struct thread_map *threads = thread_map__new_event(&event->thread_map); 1336 size_t ret; 1337 1338 ret = fprintf(fp, " nr: "); 1339 1340 if (threads) 1341 ret += thread_map__fprintf(threads, fp); 1342 else 1343 ret += fprintf(fp, "failed to get threads from event\n"); 1344 1345 thread_map__put(threads); 1346 return ret; 1347 } 1348 1349 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) 1350 { 1351 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); 1352 size_t ret; 1353 1354 ret = fprintf(fp, ": "); 1355 1356 if (cpus) 1357 ret += cpu_map__fprintf(cpus, fp); 1358 else 1359 ret += fprintf(fp, "failed to get cpumap from event\n"); 1360 1361 cpu_map__put(cpus); 1362 return ret; 1363 } 1364 1365 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 1366 union perf_event *event, 1367 struct perf_sample *sample, 1368 struct machine *machine) 1369 { 1370 return machine__process_mmap_event(machine, event, sample); 1371 } 1372 1373 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 1374 union perf_event *event, 1375 struct perf_sample *sample, 1376 struct machine *machine) 1377 { 1378 return machine__process_mmap2_event(machine, event, sample); 1379 } 1380 1381 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 1382 { 1383 return fprintf(fp, "(%d:%d):(%d:%d)\n", 1384 event->fork.pid, event->fork.tid, 1385 event->fork.ppid, event->fork.ptid); 1386 } 1387 1388 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 1389 union perf_event *event, 1390 struct perf_sample *sample, 1391 struct machine *machine) 1392 { 1393 return machine__process_fork_event(machine, event, sample); 1394 } 1395 1396 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 1397 union perf_event *event, 1398 struct perf_sample *sample, 1399 struct machine *machine) 1400 { 1401 return machine__process_exit_event(machine, event, sample); 1402 } 1403 1404 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 1405 { 1406 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n", 1407 event->aux.aux_offset, event->aux.aux_size, 1408 event->aux.flags, 1409 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 1410 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "", 1411 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : ""); 1412 } 1413 1414 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 1415 { 1416 return fprintf(fp, " pid: %u tid: %u\n", 1417 event->itrace_start.pid, event->itrace_start.tid); 1418 } 1419 1420 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) 1421 { 1422 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; 1423 const char *in_out = !out ? "IN " : 1424 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ? 1425 "OUT " : "OUT preempt"; 1426 1427 if (event->header.type == PERF_RECORD_SWITCH) 1428 return fprintf(fp, " %s\n", in_out); 1429 1430 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", 1431 in_out, out ? "next" : "prev", 1432 event->context_switch.next_prev_pid, 1433 event->context_switch.next_prev_tid); 1434 } 1435 1436 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp) 1437 { 1438 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost); 1439 } 1440 1441 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 1442 { 1443 size_t ret = fprintf(fp, "PERF_RECORD_%s", 1444 perf_event__name(event->header.type)); 1445 1446 switch (event->header.type) { 1447 case PERF_RECORD_COMM: 1448 ret += perf_event__fprintf_comm(event, fp); 1449 break; 1450 case PERF_RECORD_FORK: 1451 case PERF_RECORD_EXIT: 1452 ret += perf_event__fprintf_task(event, fp); 1453 break; 1454 case PERF_RECORD_MMAP: 1455 ret += perf_event__fprintf_mmap(event, fp); 1456 break; 1457 case PERF_RECORD_NAMESPACES: 1458 ret += perf_event__fprintf_namespaces(event, fp); 1459 break; 1460 case PERF_RECORD_MMAP2: 1461 ret += perf_event__fprintf_mmap2(event, fp); 1462 break; 1463 case PERF_RECORD_AUX: 1464 ret += perf_event__fprintf_aux(event, fp); 1465 break; 1466 case PERF_RECORD_ITRACE_START: 1467 ret += perf_event__fprintf_itrace_start(event, fp); 1468 break; 1469 case PERF_RECORD_SWITCH: 1470 case PERF_RECORD_SWITCH_CPU_WIDE: 1471 ret += perf_event__fprintf_switch(event, fp); 1472 break; 1473 case PERF_RECORD_LOST: 1474 ret += perf_event__fprintf_lost(event, fp); 1475 break; 1476 default: 1477 ret += fprintf(fp, "\n"); 1478 } 1479 1480 return ret; 1481 } 1482 1483 int perf_event__process(struct perf_tool *tool __maybe_unused, 1484 union perf_event *event, 1485 struct perf_sample *sample, 1486 struct machine *machine) 1487 { 1488 return machine__process_event(machine, event, sample); 1489 } 1490 1491 struct map *__thread__find_map(struct thread *thread, u8 cpumode, enum map_type type, 1492 u64 addr, struct addr_location *al) 1493 { 1494 struct map_groups *mg = thread->mg; 1495 struct machine *machine = mg->machine; 1496 bool load_map = false; 1497 1498 al->machine = machine; 1499 al->thread = thread; 1500 al->addr = addr; 1501 al->cpumode = cpumode; 1502 al->filtered = 0; 1503 1504 if (machine == NULL) { 1505 al->map = NULL; 1506 return NULL; 1507 } 1508 1509 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 1510 al->level = 'k'; 1511 mg = &machine->kmaps; 1512 load_map = true; 1513 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 1514 al->level = '.'; 1515 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 1516 al->level = 'g'; 1517 mg = &machine->kmaps; 1518 load_map = true; 1519 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 1520 al->level = 'u'; 1521 } else { 1522 al->level = 'H'; 1523 al->map = NULL; 1524 1525 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 1526 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 1527 !perf_guest) 1528 al->filtered |= (1 << HIST_FILTER__GUEST); 1529 if ((cpumode == PERF_RECORD_MISC_USER || 1530 cpumode == PERF_RECORD_MISC_KERNEL) && 1531 !perf_host) 1532 al->filtered |= (1 << HIST_FILTER__HOST); 1533 1534 return NULL; 1535 } 1536 try_again: 1537 al->map = __map_groups__find(mg, type, al->addr); 1538 if (al->map == NULL) { 1539 /* 1540 * If this is outside of all known maps, and is a negative 1541 * address, try to look it up in the kernel dso, as it might be 1542 * a vsyscall or vdso (which executes in user-mode). 1543 * 1544 * XXX This is nasty, we should have a symbol list in the 1545 * "[vdso]" dso, but for now lets use the old trick of looking 1546 * in the whole kernel symbol list. 1547 */ 1548 if (cpumode == PERF_RECORD_MISC_USER && machine && 1549 mg != &machine->kmaps && 1550 machine__kernel_ip(machine, al->addr)) { 1551 mg = &machine->kmaps; 1552 load_map = true; 1553 goto try_again; 1554 } 1555 } else { 1556 /* 1557 * Kernel maps might be changed when loading symbols so loading 1558 * must be done prior to using kernel maps. 1559 */ 1560 if (load_map) 1561 map__load(al->map); 1562 al->addr = al->map->map_ip(al->map, al->addr); 1563 } 1564 1565 return al->map; 1566 } 1567 1568 struct symbol *__thread__find_symbol(struct thread *thread, u8 cpumode, 1569 enum map_type type, u64 addr, 1570 struct addr_location *al) 1571 { 1572 al->sym = NULL; 1573 if (__thread__find_map(thread, cpumode, type, addr, al)) 1574 al->sym = map__find_symbol(al->map, al->addr); 1575 return al->sym; 1576 } 1577 1578 /* 1579 * Callers need to drop the reference to al->thread, obtained in 1580 * machine__findnew_thread() 1581 */ 1582 int machine__resolve(struct machine *machine, struct addr_location *al, 1583 struct perf_sample *sample) 1584 { 1585 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1586 sample->tid); 1587 1588 if (thread == NULL) 1589 return -1; 1590 1591 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1592 thread__find_map(thread, sample->cpumode, sample->ip, al); 1593 dump_printf(" ...... dso: %s\n", 1594 al->map ? al->map->dso->long_name : 1595 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1596 1597 if (thread__is_filtered(thread)) 1598 al->filtered |= (1 << HIST_FILTER__THREAD); 1599 1600 al->sym = NULL; 1601 al->cpu = sample->cpu; 1602 al->socket = -1; 1603 al->srcline = NULL; 1604 1605 if (al->cpu >= 0) { 1606 struct perf_env *env = machine->env; 1607 1608 if (env && env->cpu) 1609 al->socket = env->cpu[al->cpu].socket_id; 1610 } 1611 1612 if (al->map) { 1613 struct dso *dso = al->map->dso; 1614 1615 if (symbol_conf.dso_list && 1616 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1617 dso->short_name) || 1618 (dso->short_name != dso->long_name && 1619 strlist__has_entry(symbol_conf.dso_list, 1620 dso->long_name))))) { 1621 al->filtered |= (1 << HIST_FILTER__DSO); 1622 } 1623 1624 al->sym = map__find_symbol(al->map, al->addr); 1625 } 1626 1627 if (symbol_conf.sym_list && 1628 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1629 al->sym->name))) { 1630 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1631 } 1632 1633 return 0; 1634 } 1635 1636 /* 1637 * The preprocess_sample method will return with reference counts for the 1638 * in it, when done using (and perhaps getting ref counts if needing to 1639 * keep a pointer to one of those entries) it must be paired with 1640 * addr_location__put(), so that the refcounts can be decremented. 1641 */ 1642 void addr_location__put(struct addr_location *al) 1643 { 1644 thread__zput(al->thread); 1645 } 1646 1647 bool is_bts_event(struct perf_event_attr *attr) 1648 { 1649 return attr->type == PERF_TYPE_HARDWARE && 1650 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1651 attr->sample_period == 1; 1652 } 1653 1654 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1655 { 1656 if (attr->type == PERF_TYPE_SOFTWARE && 1657 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1658 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1659 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1660 return true; 1661 1662 if (is_bts_event(attr)) 1663 return true; 1664 1665 return false; 1666 } 1667 1668 void thread__resolve(struct thread *thread, struct addr_location *al, 1669 struct perf_sample *sample) 1670 { 1671 if (!thread__find_map(thread, sample->cpumode, sample->addr, al)) { 1672 __thread__find_map(thread, sample->cpumode, MAP__VARIABLE, 1673 sample->addr, al); 1674 } 1675 1676 al->cpu = sample->cpu; 1677 al->sym = NULL; 1678 1679 if (al->map) 1680 al->sym = map__find_symbol(al->map, al->addr); 1681 } 1682