1 #include <dirent.h> 2 #include <errno.h> 3 #include <fcntl.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 <linux/zalloc.h> 14 #include "dso.h" 15 #include "event.h" 16 #include "debug.h" 17 #include "hist.h" 18 #include "machine.h" 19 #include "sort.h" 20 #include "string2.h" 21 #include "strlist.h" 22 #include "thread.h" 23 #include "thread_map.h" 24 #include "time-utils.h" 25 #include <linux/ctype.h> 26 #include "map.h" 27 #include "symbol.h" 28 #include "symbol/kallsyms.h" 29 #include "asm/bug.h" 30 #include "stat.h" 31 #include "session.h" 32 #include "bpf-event.h" 33 #include "tool.h" 34 #include "../perf.h" 35 36 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500 37 38 static const char *perf_event__names[] = { 39 [0] = "TOTAL", 40 [PERF_RECORD_MMAP] = "MMAP", 41 [PERF_RECORD_MMAP2] = "MMAP2", 42 [PERF_RECORD_LOST] = "LOST", 43 [PERF_RECORD_COMM] = "COMM", 44 [PERF_RECORD_EXIT] = "EXIT", 45 [PERF_RECORD_THROTTLE] = "THROTTLE", 46 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 47 [PERF_RECORD_FORK] = "FORK", 48 [PERF_RECORD_READ] = "READ", 49 [PERF_RECORD_SAMPLE] = "SAMPLE", 50 [PERF_RECORD_AUX] = "AUX", 51 [PERF_RECORD_ITRACE_START] = "ITRACE_START", 52 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES", 53 [PERF_RECORD_SWITCH] = "SWITCH", 54 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE", 55 [PERF_RECORD_NAMESPACES] = "NAMESPACES", 56 [PERF_RECORD_KSYMBOL] = "KSYMBOL", 57 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT", 58 [PERF_RECORD_HEADER_ATTR] = "ATTR", 59 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 60 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 61 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 62 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 63 [PERF_RECORD_ID_INDEX] = "ID_INDEX", 64 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO", 65 [PERF_RECORD_AUXTRACE] = "AUXTRACE", 66 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR", 67 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP", 68 [PERF_RECORD_CPU_MAP] = "CPU_MAP", 69 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG", 70 [PERF_RECORD_STAT] = "STAT", 71 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND", 72 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE", 73 [PERF_RECORD_TIME_CONV] = "TIME_CONV", 74 [PERF_RECORD_HEADER_FEATURE] = "FEATURE", 75 [PERF_RECORD_COMPRESSED] = "COMPRESSED", 76 }; 77 78 static const char *perf_ns__names[] = { 79 [NET_NS_INDEX] = "net", 80 [UTS_NS_INDEX] = "uts", 81 [IPC_NS_INDEX] = "ipc", 82 [PID_NS_INDEX] = "pid", 83 [USER_NS_INDEX] = "user", 84 [MNT_NS_INDEX] = "mnt", 85 [CGROUP_NS_INDEX] = "cgroup", 86 }; 87 88 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT; 89 90 const char *perf_event__name(unsigned int id) 91 { 92 if (id >= ARRAY_SIZE(perf_event__names)) 93 return "INVALID"; 94 if (!perf_event__names[id]) 95 return "UNKNOWN"; 96 return perf_event__names[id]; 97 } 98 99 static const char *perf_ns__name(unsigned int id) 100 { 101 if (id >= ARRAY_SIZE(perf_ns__names)) 102 return "UNKNOWN"; 103 return perf_ns__names[id]; 104 } 105 106 int perf_tool__process_synth_event(struct perf_tool *tool, 107 union perf_event *event, 108 struct machine *machine, 109 perf_event__handler_t process) 110 { 111 struct perf_sample synth_sample = { 112 .pid = -1, 113 .tid = -1, 114 .time = -1, 115 .stream_id = -1, 116 .cpu = -1, 117 .period = 1, 118 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, 119 }; 120 121 return process(tool, event, &synth_sample, machine); 122 }; 123 124 /* 125 * Assumes that the first 4095 bytes of /proc/pid/stat contains 126 * the comm, tgid and ppid. 127 */ 128 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 129 pid_t *tgid, pid_t *ppid) 130 { 131 char filename[PATH_MAX]; 132 char bf[4096]; 133 int fd; 134 size_t size = 0; 135 ssize_t n; 136 char *name, *tgids, *ppids; 137 138 *tgid = -1; 139 *ppid = -1; 140 141 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 142 143 fd = open(filename, O_RDONLY); 144 if (fd < 0) { 145 pr_debug("couldn't open %s\n", filename); 146 return -1; 147 } 148 149 n = read(fd, bf, sizeof(bf) - 1); 150 close(fd); 151 if (n <= 0) { 152 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 153 pid); 154 return -1; 155 } 156 bf[n] = '\0'; 157 158 name = strstr(bf, "Name:"); 159 tgids = strstr(bf, "Tgid:"); 160 ppids = strstr(bf, "PPid:"); 161 162 if (name) { 163 char *nl; 164 165 name = skip_spaces(name + 5); /* strlen("Name:") */ 166 nl = strchr(name, '\n'); 167 if (nl) 168 *nl = '\0'; 169 170 size = strlen(name); 171 if (size >= len) 172 size = len - 1; 173 memcpy(comm, name, size); 174 comm[size] = '\0'; 175 } else { 176 pr_debug("Name: string not found for pid %d\n", pid); 177 } 178 179 if (tgids) { 180 tgids += 5; /* strlen("Tgid:") */ 181 *tgid = atoi(tgids); 182 } else { 183 pr_debug("Tgid: string not found for pid %d\n", pid); 184 } 185 186 if (ppids) { 187 ppids += 5; /* strlen("PPid:") */ 188 *ppid = atoi(ppids); 189 } else { 190 pr_debug("PPid: string not found for pid %d\n", pid); 191 } 192 193 return 0; 194 } 195 196 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 197 struct machine *machine, 198 pid_t *tgid, pid_t *ppid) 199 { 200 size_t size; 201 202 *ppid = -1; 203 204 memset(&event->comm, 0, sizeof(event->comm)); 205 206 if (machine__is_host(machine)) { 207 if (perf_event__get_comm_ids(pid, event->comm.comm, 208 sizeof(event->comm.comm), 209 tgid, ppid) != 0) { 210 return -1; 211 } 212 } else { 213 *tgid = machine->pid; 214 } 215 216 if (*tgid < 0) 217 return -1; 218 219 event->comm.pid = *tgid; 220 event->comm.header.type = PERF_RECORD_COMM; 221 222 size = strlen(event->comm.comm) + 1; 223 size = PERF_ALIGN(size, sizeof(u64)); 224 memset(event->comm.comm + size, 0, machine->id_hdr_size); 225 event->comm.header.size = (sizeof(event->comm) - 226 (sizeof(event->comm.comm) - size) + 227 machine->id_hdr_size); 228 event->comm.tid = pid; 229 230 return 0; 231 } 232 233 pid_t perf_event__synthesize_comm(struct perf_tool *tool, 234 union perf_event *event, pid_t pid, 235 perf_event__handler_t process, 236 struct machine *machine) 237 { 238 pid_t tgid, ppid; 239 240 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 241 return -1; 242 243 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 244 return -1; 245 246 return tgid; 247 } 248 249 static void perf_event__get_ns_link_info(pid_t pid, const char *ns, 250 struct perf_ns_link_info *ns_link_info) 251 { 252 struct stat64 st; 253 char proc_ns[128]; 254 255 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns); 256 if (stat64(proc_ns, &st) == 0) { 257 ns_link_info->dev = st.st_dev; 258 ns_link_info->ino = st.st_ino; 259 } 260 } 261 262 int perf_event__synthesize_namespaces(struct perf_tool *tool, 263 union perf_event *event, 264 pid_t pid, pid_t tgid, 265 perf_event__handler_t process, 266 struct machine *machine) 267 { 268 u32 idx; 269 struct perf_ns_link_info *ns_link_info; 270 271 if (!tool || !tool->namespace_events) 272 return 0; 273 274 memset(&event->namespaces, 0, (sizeof(event->namespaces) + 275 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 276 machine->id_hdr_size)); 277 278 event->namespaces.pid = tgid; 279 event->namespaces.tid = pid; 280 281 event->namespaces.nr_namespaces = NR_NAMESPACES; 282 283 ns_link_info = event->namespaces.link_info; 284 285 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++) 286 perf_event__get_ns_link_info(pid, perf_ns__name(idx), 287 &ns_link_info[idx]); 288 289 event->namespaces.header.type = PERF_RECORD_NAMESPACES; 290 291 event->namespaces.header.size = (sizeof(event->namespaces) + 292 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 293 machine->id_hdr_size); 294 295 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 296 return -1; 297 298 return 0; 299 } 300 301 static int perf_event__synthesize_fork(struct perf_tool *tool, 302 union perf_event *event, 303 pid_t pid, pid_t tgid, pid_t ppid, 304 perf_event__handler_t process, 305 struct machine *machine) 306 { 307 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 308 309 /* 310 * for main thread set parent to ppid from status file. For other 311 * threads set parent pid to main thread. ie., assume main thread 312 * spawns all threads in a process 313 */ 314 if (tgid == pid) { 315 event->fork.ppid = ppid; 316 event->fork.ptid = ppid; 317 } else { 318 event->fork.ppid = tgid; 319 event->fork.ptid = tgid; 320 } 321 event->fork.pid = tgid; 322 event->fork.tid = pid; 323 event->fork.header.type = PERF_RECORD_FORK; 324 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC; 325 326 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 327 328 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 329 return -1; 330 331 return 0; 332 } 333 334 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 335 union perf_event *event, 336 pid_t pid, pid_t tgid, 337 perf_event__handler_t process, 338 struct machine *machine, 339 bool mmap_data) 340 { 341 char filename[PATH_MAX]; 342 FILE *fp; 343 unsigned long long t; 344 bool truncation = false; 345 unsigned long long timeout = proc_map_timeout * 1000000ULL; 346 int rc = 0; 347 const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); 348 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; 349 350 if (machine__is_default_guest(machine)) 351 return 0; 352 353 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps", 354 machine->root_dir, pid, pid); 355 356 fp = fopen(filename, "r"); 357 if (fp == NULL) { 358 /* 359 * We raced with a task exiting - just return: 360 */ 361 pr_debug("couldn't open %s\n", filename); 362 return -1; 363 } 364 365 event->header.type = PERF_RECORD_MMAP2; 366 t = rdclock(); 367 368 while (1) { 369 char bf[BUFSIZ]; 370 char prot[5]; 371 char execname[PATH_MAX]; 372 char anonstr[] = "//anon"; 373 unsigned int ino; 374 size_t size; 375 ssize_t n; 376 377 if (fgets(bf, sizeof(bf), fp) == NULL) 378 break; 379 380 if ((rdclock() - t) > timeout) { 381 pr_warning("Reading %s time out. " 382 "You may want to increase " 383 "the time limit by --proc-map-timeout\n", 384 filename); 385 truncation = true; 386 goto out; 387 } 388 389 /* ensure null termination since stack will be reused. */ 390 strcpy(execname, ""); 391 392 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 393 n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n", 394 &event->mmap2.start, &event->mmap2.len, prot, 395 &event->mmap2.pgoff, &event->mmap2.maj, 396 &event->mmap2.min, 397 &ino, execname); 398 399 /* 400 * Anon maps don't have the execname. 401 */ 402 if (n < 7) 403 continue; 404 405 event->mmap2.ino = (u64)ino; 406 407 /* 408 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 409 */ 410 if (machine__is_host(machine)) 411 event->header.misc = PERF_RECORD_MISC_USER; 412 else 413 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 414 415 /* map protection and flags bits */ 416 event->mmap2.prot = 0; 417 event->mmap2.flags = 0; 418 if (prot[0] == 'r') 419 event->mmap2.prot |= PROT_READ; 420 if (prot[1] == 'w') 421 event->mmap2.prot |= PROT_WRITE; 422 if (prot[2] == 'x') 423 event->mmap2.prot |= PROT_EXEC; 424 425 if (prot[3] == 's') 426 event->mmap2.flags |= MAP_SHARED; 427 else 428 event->mmap2.flags |= MAP_PRIVATE; 429 430 if (prot[2] != 'x') { 431 if (!mmap_data || prot[0] != 'r') 432 continue; 433 434 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 435 } 436 437 out: 438 if (truncation) 439 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; 440 441 if (!strcmp(execname, "")) 442 strcpy(execname, anonstr); 443 444 if (hugetlbfs_mnt_len && 445 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { 446 strcpy(execname, anonstr); 447 event->mmap2.flags |= MAP_HUGETLB; 448 } 449 450 size = strlen(execname) + 1; 451 memcpy(event->mmap2.filename, execname, size); 452 size = PERF_ALIGN(size, sizeof(u64)); 453 event->mmap2.len -= event->mmap.start; 454 event->mmap2.header.size = (sizeof(event->mmap2) - 455 (sizeof(event->mmap2.filename) - size)); 456 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 457 event->mmap2.header.size += machine->id_hdr_size; 458 event->mmap2.pid = tgid; 459 event->mmap2.tid = pid; 460 461 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 462 rc = -1; 463 break; 464 } 465 466 if (truncation) 467 break; 468 } 469 470 fclose(fp); 471 return rc; 472 } 473 474 int perf_event__synthesize_modules(struct perf_tool *tool, 475 perf_event__handler_t process, 476 struct machine *machine) 477 { 478 int rc = 0; 479 struct map *pos; 480 struct maps *maps = machine__kernel_maps(machine); 481 union perf_event *event = zalloc((sizeof(event->mmap) + 482 machine->id_hdr_size)); 483 if (event == NULL) { 484 pr_debug("Not enough memory synthesizing mmap event " 485 "for kernel modules\n"); 486 return -1; 487 } 488 489 event->header.type = PERF_RECORD_MMAP; 490 491 /* 492 * kernel uses 0 for user space maps, see kernel/perf_event.c 493 * __perf_event_mmap 494 */ 495 if (machine__is_host(machine)) 496 event->header.misc = PERF_RECORD_MISC_KERNEL; 497 else 498 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 499 500 for (pos = maps__first(maps); pos; pos = map__next(pos)) { 501 size_t size; 502 503 if (!__map__is_kmodule(pos)) 504 continue; 505 506 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 507 event->mmap.header.type = PERF_RECORD_MMAP; 508 event->mmap.header.size = (sizeof(event->mmap) - 509 (sizeof(event->mmap.filename) - size)); 510 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 511 event->mmap.header.size += machine->id_hdr_size; 512 event->mmap.start = pos->start; 513 event->mmap.len = pos->end - pos->start; 514 event->mmap.pid = machine->pid; 515 516 memcpy(event->mmap.filename, pos->dso->long_name, 517 pos->dso->long_name_len + 1); 518 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 519 rc = -1; 520 break; 521 } 522 } 523 524 free(event); 525 return rc; 526 } 527 528 static int __event__synthesize_thread(union perf_event *comm_event, 529 union perf_event *mmap_event, 530 union perf_event *fork_event, 531 union perf_event *namespaces_event, 532 pid_t pid, int full, 533 perf_event__handler_t process, 534 struct perf_tool *tool, 535 struct machine *machine, 536 bool mmap_data) 537 { 538 char filename[PATH_MAX]; 539 DIR *tasks; 540 struct dirent *dirent; 541 pid_t tgid, ppid; 542 int rc = 0; 543 544 /* special case: only send one comm event using passed in pid */ 545 if (!full) { 546 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 547 process, machine); 548 549 if (tgid == -1) 550 return -1; 551 552 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid, 553 tgid, process, machine) < 0) 554 return -1; 555 556 /* 557 * send mmap only for thread group leader 558 * see thread__init_map_groups 559 */ 560 if (pid == tgid && 561 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 562 process, machine, mmap_data)) 563 return -1; 564 565 return 0; 566 } 567 568 if (machine__is_default_guest(machine)) 569 return 0; 570 571 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 572 machine->root_dir, pid); 573 574 tasks = opendir(filename); 575 if (tasks == NULL) { 576 pr_debug("couldn't open %s\n", filename); 577 return 0; 578 } 579 580 while ((dirent = readdir(tasks)) != NULL) { 581 char *end; 582 pid_t _pid; 583 584 _pid = strtol(dirent->d_name, &end, 10); 585 if (*end) 586 continue; 587 588 rc = -1; 589 if (perf_event__prepare_comm(comm_event, _pid, machine, 590 &tgid, &ppid) != 0) 591 break; 592 593 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 594 ppid, process, machine) < 0) 595 break; 596 597 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid, 598 tgid, process, machine) < 0) 599 break; 600 601 /* 602 * Send the prepared comm event 603 */ 604 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) 605 break; 606 607 rc = 0; 608 if (_pid == pid) { 609 /* process the parent's maps too */ 610 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 611 process, machine, mmap_data); 612 if (rc) 613 break; 614 } 615 } 616 617 closedir(tasks); 618 return rc; 619 } 620 621 int perf_event__synthesize_thread_map(struct perf_tool *tool, 622 struct perf_thread_map *threads, 623 perf_event__handler_t process, 624 struct machine *machine, 625 bool mmap_data) 626 { 627 union perf_event *comm_event, *mmap_event, *fork_event; 628 union perf_event *namespaces_event; 629 int err = -1, thread, j; 630 631 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 632 if (comm_event == NULL) 633 goto out; 634 635 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 636 if (mmap_event == NULL) 637 goto out_free_comm; 638 639 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 640 if (fork_event == NULL) 641 goto out_free_mmap; 642 643 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 644 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 645 machine->id_hdr_size); 646 if (namespaces_event == NULL) 647 goto out_free_fork; 648 649 err = 0; 650 for (thread = 0; thread < threads->nr; ++thread) { 651 if (__event__synthesize_thread(comm_event, mmap_event, 652 fork_event, namespaces_event, 653 perf_thread_map__pid(threads, thread), 0, 654 process, tool, machine, 655 mmap_data)) { 656 err = -1; 657 break; 658 } 659 660 /* 661 * comm.pid is set to thread group id by 662 * perf_event__synthesize_comm 663 */ 664 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) { 665 bool need_leader = true; 666 667 /* is thread group leader in thread_map? */ 668 for (j = 0; j < threads->nr; ++j) { 669 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) { 670 need_leader = false; 671 break; 672 } 673 } 674 675 /* if not, generate events for it */ 676 if (need_leader && 677 __event__synthesize_thread(comm_event, mmap_event, 678 fork_event, namespaces_event, 679 comm_event->comm.pid, 0, 680 process, tool, machine, 681 mmap_data)) { 682 err = -1; 683 break; 684 } 685 } 686 } 687 free(namespaces_event); 688 out_free_fork: 689 free(fork_event); 690 out_free_mmap: 691 free(mmap_event); 692 out_free_comm: 693 free(comm_event); 694 out: 695 return err; 696 } 697 698 static int __perf_event__synthesize_threads(struct perf_tool *tool, 699 perf_event__handler_t process, 700 struct machine *machine, 701 bool mmap_data, 702 struct dirent **dirent, 703 int start, 704 int num) 705 { 706 union perf_event *comm_event, *mmap_event, *fork_event; 707 union perf_event *namespaces_event; 708 int err = -1; 709 char *end; 710 pid_t pid; 711 int i; 712 713 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 714 if (comm_event == NULL) 715 goto out; 716 717 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 718 if (mmap_event == NULL) 719 goto out_free_comm; 720 721 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 722 if (fork_event == NULL) 723 goto out_free_mmap; 724 725 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 726 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 727 machine->id_hdr_size); 728 if (namespaces_event == NULL) 729 goto out_free_fork; 730 731 for (i = start; i < start + num; i++) { 732 if (!isdigit(dirent[i]->d_name[0])) 733 continue; 734 735 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); 736 /* only interested in proper numerical dirents */ 737 if (*end) 738 continue; 739 /* 740 * We may race with exiting thread, so don't stop just because 741 * one thread couldn't be synthesized. 742 */ 743 __event__synthesize_thread(comm_event, mmap_event, fork_event, 744 namespaces_event, pid, 1, process, 745 tool, machine, mmap_data); 746 } 747 err = 0; 748 749 free(namespaces_event); 750 out_free_fork: 751 free(fork_event); 752 out_free_mmap: 753 free(mmap_event); 754 out_free_comm: 755 free(comm_event); 756 out: 757 return err; 758 } 759 760 struct synthesize_threads_arg { 761 struct perf_tool *tool; 762 perf_event__handler_t process; 763 struct machine *machine; 764 bool mmap_data; 765 struct dirent **dirent; 766 int num; 767 int start; 768 }; 769 770 static void *synthesize_threads_worker(void *arg) 771 { 772 struct synthesize_threads_arg *args = arg; 773 774 __perf_event__synthesize_threads(args->tool, args->process, 775 args->machine, args->mmap_data, 776 args->dirent, 777 args->start, args->num); 778 return NULL; 779 } 780 781 int perf_event__synthesize_threads(struct perf_tool *tool, 782 perf_event__handler_t process, 783 struct machine *machine, 784 bool mmap_data, 785 unsigned int nr_threads_synthesize) 786 { 787 struct synthesize_threads_arg *args = NULL; 788 pthread_t *synthesize_threads = NULL; 789 char proc_path[PATH_MAX]; 790 struct dirent **dirent; 791 int num_per_thread; 792 int m, n, i, j; 793 int thread_nr; 794 int base = 0; 795 int err = -1; 796 797 798 if (machine__is_default_guest(machine)) 799 return 0; 800 801 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 802 n = scandir(proc_path, &dirent, 0, alphasort); 803 if (n < 0) 804 return err; 805 806 if (nr_threads_synthesize == UINT_MAX) 807 thread_nr = sysconf(_SC_NPROCESSORS_ONLN); 808 else 809 thread_nr = nr_threads_synthesize; 810 811 if (thread_nr <= 1) { 812 err = __perf_event__synthesize_threads(tool, process, 813 machine, mmap_data, 814 dirent, base, n); 815 goto free_dirent; 816 } 817 if (thread_nr > n) 818 thread_nr = n; 819 820 synthesize_threads = calloc(sizeof(pthread_t), thread_nr); 821 if (synthesize_threads == NULL) 822 goto free_dirent; 823 824 args = calloc(sizeof(*args), thread_nr); 825 if (args == NULL) 826 goto free_threads; 827 828 num_per_thread = n / thread_nr; 829 m = n % thread_nr; 830 for (i = 0; i < thread_nr; i++) { 831 args[i].tool = tool; 832 args[i].process = process; 833 args[i].machine = machine; 834 args[i].mmap_data = mmap_data; 835 args[i].dirent = dirent; 836 } 837 for (i = 0; i < m; i++) { 838 args[i].num = num_per_thread + 1; 839 args[i].start = i * args[i].num; 840 } 841 if (i != 0) 842 base = args[i-1].start + args[i-1].num; 843 for (j = i; j < thread_nr; j++) { 844 args[j].num = num_per_thread; 845 args[j].start = base + (j - i) * args[i].num; 846 } 847 848 for (i = 0; i < thread_nr; i++) { 849 if (pthread_create(&synthesize_threads[i], NULL, 850 synthesize_threads_worker, &args[i])) 851 goto out_join; 852 } 853 err = 0; 854 out_join: 855 for (i = 0; i < thread_nr; i++) 856 pthread_join(synthesize_threads[i], NULL); 857 free(args); 858 free_threads: 859 free(synthesize_threads); 860 free_dirent: 861 for (i = 0; i < n; i++) 862 zfree(&dirent[i]); 863 free(dirent); 864 865 return err; 866 } 867 868 struct process_symbol_args { 869 const char *name; 870 u64 start; 871 }; 872 873 static int find_symbol_cb(void *arg, const char *name, char type, 874 u64 start) 875 { 876 struct process_symbol_args *args = arg; 877 878 /* 879 * Must be a function or at least an alias, as in PARISC64, where "_text" is 880 * an 'A' to the same address as "_stext". 881 */ 882 if (!(kallsyms__is_function(type) || 883 type == 'A') || strcmp(name, args->name)) 884 return 0; 885 886 args->start = start; 887 return 1; 888 } 889 890 int kallsyms__get_function_start(const char *kallsyms_filename, 891 const char *symbol_name, u64 *addr) 892 { 893 struct process_symbol_args args = { .name = symbol_name, }; 894 895 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 896 return -1; 897 898 *addr = args.start; 899 return 0; 900 } 901 902 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused, 903 perf_event__handler_t process __maybe_unused, 904 struct machine *machine __maybe_unused) 905 { 906 return 0; 907 } 908 909 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 910 perf_event__handler_t process, 911 struct machine *machine) 912 { 913 size_t size; 914 struct map *map = machine__kernel_map(machine); 915 struct kmap *kmap; 916 int err; 917 union perf_event *event; 918 919 if (map == NULL) 920 return -1; 921 922 kmap = map__kmap(map); 923 if (!kmap->ref_reloc_sym) 924 return -1; 925 926 /* 927 * We should get this from /sys/kernel/sections/.text, but till that is 928 * available use this, and after it is use this as a fallback for older 929 * kernels. 930 */ 931 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 932 if (event == NULL) { 933 pr_debug("Not enough memory synthesizing mmap event " 934 "for kernel modules\n"); 935 return -1; 936 } 937 938 if (machine__is_host(machine)) { 939 /* 940 * kernel uses PERF_RECORD_MISC_USER for user space maps, 941 * see kernel/perf_event.c __perf_event_mmap 942 */ 943 event->header.misc = PERF_RECORD_MISC_KERNEL; 944 } else { 945 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 946 } 947 948 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 949 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; 950 size = PERF_ALIGN(size, sizeof(u64)); 951 event->mmap.header.type = PERF_RECORD_MMAP; 952 event->mmap.header.size = (sizeof(event->mmap) - 953 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 954 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 955 event->mmap.start = map->start; 956 event->mmap.len = map->end - event->mmap.start; 957 event->mmap.pid = machine->pid; 958 959 err = perf_tool__process_synth_event(tool, event, machine, process); 960 free(event); 961 962 return err; 963 } 964 965 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 966 perf_event__handler_t process, 967 struct machine *machine) 968 { 969 int err; 970 971 err = __perf_event__synthesize_kernel_mmap(tool, process, machine); 972 if (err < 0) 973 return err; 974 975 return perf_event__synthesize_extra_kmaps(tool, process, machine); 976 } 977 978 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 979 struct perf_thread_map *threads, 980 perf_event__handler_t process, 981 struct machine *machine) 982 { 983 union perf_event *event; 984 int i, err, size; 985 986 size = sizeof(event->thread_map); 987 size += threads->nr * sizeof(event->thread_map.entries[0]); 988 989 event = zalloc(size); 990 if (!event) 991 return -ENOMEM; 992 993 event->header.type = PERF_RECORD_THREAD_MAP; 994 event->header.size = size; 995 event->thread_map.nr = threads->nr; 996 997 for (i = 0; i < threads->nr; i++) { 998 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i]; 999 char *comm = perf_thread_map__comm(threads, i); 1000 1001 if (!comm) 1002 comm = (char *) ""; 1003 1004 entry->pid = perf_thread_map__pid(threads, i); 1005 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 1006 } 1007 1008 err = process(tool, event, NULL, machine); 1009 1010 free(event); 1011 return err; 1012 } 1013 1014 static void synthesize_cpus(struct cpu_map_entries *cpus, 1015 struct perf_cpu_map *map) 1016 { 1017 int i; 1018 1019 cpus->nr = map->nr; 1020 1021 for (i = 0; i < map->nr; i++) 1022 cpus->cpu[i] = map->map[i]; 1023 } 1024 1025 static void synthesize_mask(struct perf_record_record_cpu_map *mask, 1026 struct perf_cpu_map *map, int max) 1027 { 1028 int i; 1029 1030 mask->nr = BITS_TO_LONGS(max); 1031 mask->long_size = sizeof(long); 1032 1033 for (i = 0; i < map->nr; i++) 1034 set_bit(map->map[i], mask->mask); 1035 } 1036 1037 static size_t cpus_size(struct perf_cpu_map *map) 1038 { 1039 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 1040 } 1041 1042 static size_t mask_size(struct perf_cpu_map *map, int *max) 1043 { 1044 int i; 1045 1046 *max = 0; 1047 1048 for (i = 0; i < map->nr; i++) { 1049 /* bit possition of the cpu is + 1 */ 1050 int bit = map->map[i] + 1; 1051 1052 if (bit > *max) 1053 *max = bit; 1054 } 1055 1056 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long); 1057 } 1058 1059 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max) 1060 { 1061 size_t size_cpus, size_mask; 1062 bool is_dummy = perf_cpu_map__empty(map); 1063 1064 /* 1065 * Both array and mask data have variable size based 1066 * on the number of cpus and their actual values. 1067 * The size of the 'struct perf_record_cpu_map_data' is: 1068 * 1069 * array = size of 'struct cpu_map_entries' + 1070 * number of cpus * sizeof(u64) 1071 * 1072 * mask = size of 'struct perf_record_record_cpu_map' + 1073 * maximum cpu bit converted to size of longs 1074 * 1075 * and finaly + the size of 'struct perf_record_cpu_map_data'. 1076 */ 1077 size_cpus = cpus_size(map); 1078 size_mask = mask_size(map, max); 1079 1080 if (is_dummy || (size_cpus < size_mask)) { 1081 *size += size_cpus; 1082 *type = PERF_CPU_MAP__CPUS; 1083 } else { 1084 *size += size_mask; 1085 *type = PERF_CPU_MAP__MASK; 1086 } 1087 1088 *size += sizeof(struct perf_record_cpu_map_data); 1089 *size = PERF_ALIGN(*size, sizeof(u64)); 1090 return zalloc(*size); 1091 } 1092 1093 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map, 1094 u16 type, int max) 1095 { 1096 data->type = type; 1097 1098 switch (type) { 1099 case PERF_CPU_MAP__CPUS: 1100 synthesize_cpus((struct cpu_map_entries *) data->data, map); 1101 break; 1102 case PERF_CPU_MAP__MASK: 1103 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max); 1104 default: 1105 break; 1106 }; 1107 } 1108 1109 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map) 1110 { 1111 size_t size = sizeof(struct perf_record_cpu_map); 1112 struct perf_record_cpu_map *event; 1113 int max; 1114 u16 type; 1115 1116 event = cpu_map_data__alloc(map, &size, &type, &max); 1117 if (!event) 1118 return NULL; 1119 1120 event->header.type = PERF_RECORD_CPU_MAP; 1121 event->header.size = size; 1122 event->data.type = type; 1123 1124 cpu_map_data__synthesize(&event->data, map, type, max); 1125 return event; 1126 } 1127 1128 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 1129 struct perf_cpu_map *map, 1130 perf_event__handler_t process, 1131 struct machine *machine) 1132 { 1133 struct perf_record_cpu_map *event; 1134 int err; 1135 1136 event = cpu_map_event__new(map); 1137 if (!event) 1138 return -ENOMEM; 1139 1140 err = process(tool, (union perf_event *) event, NULL, machine); 1141 1142 free(event); 1143 return err; 1144 } 1145 1146 int perf_event__synthesize_stat_config(struct perf_tool *tool, 1147 struct perf_stat_config *config, 1148 perf_event__handler_t process, 1149 struct machine *machine) 1150 { 1151 struct perf_record_stat_config *event; 1152 int size, i = 0, err; 1153 1154 size = sizeof(*event); 1155 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 1156 1157 event = zalloc(size); 1158 if (!event) 1159 return -ENOMEM; 1160 1161 event->header.type = PERF_RECORD_STAT_CONFIG; 1162 event->header.size = size; 1163 event->nr = PERF_STAT_CONFIG_TERM__MAX; 1164 1165 #define ADD(__term, __val) \ 1166 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 1167 event->data[i].val = __val; \ 1168 i++; 1169 1170 ADD(AGGR_MODE, config->aggr_mode) 1171 ADD(INTERVAL, config->interval) 1172 ADD(SCALE, config->scale) 1173 1174 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 1175 "stat config terms unbalanced\n"); 1176 #undef ADD 1177 1178 err = process(tool, (union perf_event *) event, NULL, machine); 1179 1180 free(event); 1181 return err; 1182 } 1183 1184 int perf_event__synthesize_stat(struct perf_tool *tool, 1185 u32 cpu, u32 thread, u64 id, 1186 struct perf_counts_values *count, 1187 perf_event__handler_t process, 1188 struct machine *machine) 1189 { 1190 struct perf_record_stat event; 1191 1192 event.header.type = PERF_RECORD_STAT; 1193 event.header.size = sizeof(event); 1194 event.header.misc = 0; 1195 1196 event.id = id; 1197 event.cpu = cpu; 1198 event.thread = thread; 1199 event.val = count->val; 1200 event.ena = count->ena; 1201 event.run = count->run; 1202 1203 return process(tool, (union perf_event *) &event, NULL, machine); 1204 } 1205 1206 int perf_event__synthesize_stat_round(struct perf_tool *tool, 1207 u64 evtime, u64 type, 1208 perf_event__handler_t process, 1209 struct machine *machine) 1210 { 1211 struct perf_record_stat_round event; 1212 1213 event.header.type = PERF_RECORD_STAT_ROUND; 1214 event.header.size = sizeof(event); 1215 event.header.misc = 0; 1216 1217 event.time = evtime; 1218 event.type = type; 1219 1220 return process(tool, (union perf_event *) &event, NULL, machine); 1221 } 1222 1223 void perf_event__read_stat_config(struct perf_stat_config *config, 1224 struct perf_record_stat_config *event) 1225 { 1226 unsigned i; 1227 1228 for (i = 0; i < event->nr; i++) { 1229 1230 switch (event->data[i].tag) { 1231 #define CASE(__term, __val) \ 1232 case PERF_STAT_CONFIG_TERM__##__term: \ 1233 config->__val = event->data[i].val; \ 1234 break; 1235 1236 CASE(AGGR_MODE, aggr_mode) 1237 CASE(SCALE, scale) 1238 CASE(INTERVAL, interval) 1239 #undef CASE 1240 default: 1241 pr_warning("unknown stat config term %" PRI_lu64 "\n", 1242 event->data[i].tag); 1243 } 1244 } 1245 } 1246 1247 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 1248 { 1249 const char *s; 1250 1251 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 1252 s = " exec"; 1253 else 1254 s = ""; 1255 1256 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 1257 } 1258 1259 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp) 1260 { 1261 size_t ret = 0; 1262 struct perf_ns_link_info *ns_link_info; 1263 u32 nr_namespaces, idx; 1264 1265 ns_link_info = event->namespaces.link_info; 1266 nr_namespaces = event->namespaces.nr_namespaces; 1267 1268 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[", 1269 event->namespaces.pid, 1270 event->namespaces.tid, 1271 nr_namespaces); 1272 1273 for (idx = 0; idx < nr_namespaces; idx++) { 1274 if (idx && (idx % 4 == 0)) 1275 ret += fprintf(fp, "\n\t\t "); 1276 1277 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx, 1278 perf_ns__name(idx), (u64)ns_link_info[idx].dev, 1279 (u64)ns_link_info[idx].ino, 1280 ((idx + 1) != nr_namespaces) ? ", " : "]\n"); 1281 } 1282 1283 return ret; 1284 } 1285 1286 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 1287 union perf_event *event, 1288 struct perf_sample *sample, 1289 struct machine *machine) 1290 { 1291 return machine__process_comm_event(machine, event, sample); 1292 } 1293 1294 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused, 1295 union perf_event *event, 1296 struct perf_sample *sample, 1297 struct machine *machine) 1298 { 1299 return machine__process_namespaces_event(machine, event, sample); 1300 } 1301 1302 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 1303 union perf_event *event, 1304 struct perf_sample *sample, 1305 struct machine *machine) 1306 { 1307 return machine__process_lost_event(machine, event, sample); 1308 } 1309 1310 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 1311 union perf_event *event, 1312 struct perf_sample *sample __maybe_unused, 1313 struct machine *machine) 1314 { 1315 return machine__process_aux_event(machine, event); 1316 } 1317 1318 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 1319 union perf_event *event, 1320 struct perf_sample *sample __maybe_unused, 1321 struct machine *machine) 1322 { 1323 return machine__process_itrace_start_event(machine, event); 1324 } 1325 1326 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused, 1327 union perf_event *event, 1328 struct perf_sample *sample, 1329 struct machine *machine) 1330 { 1331 return machine__process_lost_samples_event(machine, event, sample); 1332 } 1333 1334 int perf_event__process_switch(struct perf_tool *tool __maybe_unused, 1335 union perf_event *event, 1336 struct perf_sample *sample __maybe_unused, 1337 struct machine *machine) 1338 { 1339 return machine__process_switch_event(machine, event); 1340 } 1341 1342 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused, 1343 union perf_event *event, 1344 struct perf_sample *sample __maybe_unused, 1345 struct machine *machine) 1346 { 1347 return machine__process_ksymbol(machine, event, sample); 1348 } 1349 1350 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused, 1351 union perf_event *event, 1352 struct perf_sample *sample, 1353 struct machine *machine) 1354 { 1355 return machine__process_bpf(machine, event, sample); 1356 } 1357 1358 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 1359 { 1360 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n", 1361 event->mmap.pid, event->mmap.tid, event->mmap.start, 1362 event->mmap.len, event->mmap.pgoff, 1363 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 1364 event->mmap.filename); 1365 } 1366 1367 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 1368 { 1369 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 1370 " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n", 1371 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 1372 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 1373 event->mmap2.min, event->mmap2.ino, 1374 event->mmap2.ino_generation, 1375 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 1376 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 1377 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 1378 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 1379 event->mmap2.filename); 1380 } 1381 1382 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) 1383 { 1384 struct perf_thread_map *threads = thread_map__new_event(&event->thread_map); 1385 size_t ret; 1386 1387 ret = fprintf(fp, " nr: "); 1388 1389 if (threads) 1390 ret += thread_map__fprintf(threads, fp); 1391 else 1392 ret += fprintf(fp, "failed to get threads from event\n"); 1393 1394 perf_thread_map__put(threads); 1395 return ret; 1396 } 1397 1398 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) 1399 { 1400 struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); 1401 size_t ret; 1402 1403 ret = fprintf(fp, ": "); 1404 1405 if (cpus) 1406 ret += cpu_map__fprintf(cpus, fp); 1407 else 1408 ret += fprintf(fp, "failed to get cpumap from event\n"); 1409 1410 perf_cpu_map__put(cpus); 1411 return ret; 1412 } 1413 1414 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 1415 union perf_event *event, 1416 struct perf_sample *sample, 1417 struct machine *machine) 1418 { 1419 return machine__process_mmap_event(machine, event, sample); 1420 } 1421 1422 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 1423 union perf_event *event, 1424 struct perf_sample *sample, 1425 struct machine *machine) 1426 { 1427 return machine__process_mmap2_event(machine, event, sample); 1428 } 1429 1430 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 1431 { 1432 return fprintf(fp, "(%d:%d):(%d:%d)\n", 1433 event->fork.pid, event->fork.tid, 1434 event->fork.ppid, event->fork.ptid); 1435 } 1436 1437 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 1438 union perf_event *event, 1439 struct perf_sample *sample, 1440 struct machine *machine) 1441 { 1442 return machine__process_fork_event(machine, event, sample); 1443 } 1444 1445 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 1446 union perf_event *event, 1447 struct perf_sample *sample, 1448 struct machine *machine) 1449 { 1450 return machine__process_exit_event(machine, event, sample); 1451 } 1452 1453 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 1454 { 1455 return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n", 1456 event->aux.aux_offset, event->aux.aux_size, 1457 event->aux.flags, 1458 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 1459 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "", 1460 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : ""); 1461 } 1462 1463 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 1464 { 1465 return fprintf(fp, " pid: %u tid: %u\n", 1466 event->itrace_start.pid, event->itrace_start.tid); 1467 } 1468 1469 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) 1470 { 1471 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; 1472 const char *in_out = !out ? "IN " : 1473 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ? 1474 "OUT " : "OUT preempt"; 1475 1476 if (event->header.type == PERF_RECORD_SWITCH) 1477 return fprintf(fp, " %s\n", in_out); 1478 1479 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", 1480 in_out, out ? "next" : "prev", 1481 event->context_switch.next_prev_pid, 1482 event->context_switch.next_prev_tid); 1483 } 1484 1485 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp) 1486 { 1487 return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost); 1488 } 1489 1490 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp) 1491 { 1492 return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n", 1493 event->ksymbol.addr, event->ksymbol.len, 1494 event->ksymbol.ksym_type, 1495 event->ksymbol.flags, event->ksymbol.name); 1496 } 1497 1498 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp) 1499 { 1500 return fprintf(fp, " type %u, flags %u, id %u\n", 1501 event->bpf.type, event->bpf.flags, event->bpf.id); 1502 } 1503 1504 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 1505 { 1506 size_t ret = fprintf(fp, "PERF_RECORD_%s", 1507 perf_event__name(event->header.type)); 1508 1509 switch (event->header.type) { 1510 case PERF_RECORD_COMM: 1511 ret += perf_event__fprintf_comm(event, fp); 1512 break; 1513 case PERF_RECORD_FORK: 1514 case PERF_RECORD_EXIT: 1515 ret += perf_event__fprintf_task(event, fp); 1516 break; 1517 case PERF_RECORD_MMAP: 1518 ret += perf_event__fprintf_mmap(event, fp); 1519 break; 1520 case PERF_RECORD_NAMESPACES: 1521 ret += perf_event__fprintf_namespaces(event, fp); 1522 break; 1523 case PERF_RECORD_MMAP2: 1524 ret += perf_event__fprintf_mmap2(event, fp); 1525 break; 1526 case PERF_RECORD_AUX: 1527 ret += perf_event__fprintf_aux(event, fp); 1528 break; 1529 case PERF_RECORD_ITRACE_START: 1530 ret += perf_event__fprintf_itrace_start(event, fp); 1531 break; 1532 case PERF_RECORD_SWITCH: 1533 case PERF_RECORD_SWITCH_CPU_WIDE: 1534 ret += perf_event__fprintf_switch(event, fp); 1535 break; 1536 case PERF_RECORD_LOST: 1537 ret += perf_event__fprintf_lost(event, fp); 1538 break; 1539 case PERF_RECORD_KSYMBOL: 1540 ret += perf_event__fprintf_ksymbol(event, fp); 1541 break; 1542 case PERF_RECORD_BPF_EVENT: 1543 ret += perf_event__fprintf_bpf(event, fp); 1544 break; 1545 default: 1546 ret += fprintf(fp, "\n"); 1547 } 1548 1549 return ret; 1550 } 1551 1552 int perf_event__process(struct perf_tool *tool __maybe_unused, 1553 union perf_event *event, 1554 struct perf_sample *sample, 1555 struct machine *machine) 1556 { 1557 return machine__process_event(machine, event, sample); 1558 } 1559 1560 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 1561 struct addr_location *al) 1562 { 1563 struct map_groups *mg = thread->mg; 1564 struct machine *machine = mg->machine; 1565 bool load_map = false; 1566 1567 al->machine = machine; 1568 al->thread = thread; 1569 al->addr = addr; 1570 al->cpumode = cpumode; 1571 al->filtered = 0; 1572 1573 if (machine == NULL) { 1574 al->map = NULL; 1575 return NULL; 1576 } 1577 1578 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 1579 al->level = 'k'; 1580 mg = &machine->kmaps; 1581 load_map = true; 1582 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 1583 al->level = '.'; 1584 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 1585 al->level = 'g'; 1586 mg = &machine->kmaps; 1587 load_map = true; 1588 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 1589 al->level = 'u'; 1590 } else { 1591 al->level = 'H'; 1592 al->map = NULL; 1593 1594 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 1595 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 1596 !perf_guest) 1597 al->filtered |= (1 << HIST_FILTER__GUEST); 1598 if ((cpumode == PERF_RECORD_MISC_USER || 1599 cpumode == PERF_RECORD_MISC_KERNEL) && 1600 !perf_host) 1601 al->filtered |= (1 << HIST_FILTER__HOST); 1602 1603 return NULL; 1604 } 1605 1606 al->map = map_groups__find(mg, al->addr); 1607 if (al->map != NULL) { 1608 /* 1609 * Kernel maps might be changed when loading symbols so loading 1610 * must be done prior to using kernel maps. 1611 */ 1612 if (load_map) 1613 map__load(al->map); 1614 al->addr = al->map->map_ip(al->map, al->addr); 1615 } 1616 1617 return al->map; 1618 } 1619 1620 /* 1621 * For branch stacks or branch samples, the sample cpumode might not be correct 1622 * because it applies only to the sample 'ip' and not necessary to 'addr' or 1623 * branch stack addresses. If possible, use a fallback to deal with those cases. 1624 */ 1625 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr, 1626 struct addr_location *al) 1627 { 1628 struct map *map = thread__find_map(thread, cpumode, addr, al); 1629 struct machine *machine = thread->mg->machine; 1630 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr); 1631 1632 if (map || addr_cpumode == cpumode) 1633 return map; 1634 1635 return thread__find_map(thread, addr_cpumode, addr, al); 1636 } 1637 1638 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode, 1639 u64 addr, struct addr_location *al) 1640 { 1641 al->sym = NULL; 1642 if (thread__find_map(thread, cpumode, addr, al)) 1643 al->sym = map__find_symbol(al->map, al->addr); 1644 return al->sym; 1645 } 1646 1647 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode, 1648 u64 addr, struct addr_location *al) 1649 { 1650 al->sym = NULL; 1651 if (thread__find_map_fb(thread, cpumode, addr, al)) 1652 al->sym = map__find_symbol(al->map, al->addr); 1653 return al->sym; 1654 } 1655 1656 /* 1657 * Callers need to drop the reference to al->thread, obtained in 1658 * machine__findnew_thread() 1659 */ 1660 int machine__resolve(struct machine *machine, struct addr_location *al, 1661 struct perf_sample *sample) 1662 { 1663 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1664 sample->tid); 1665 1666 if (thread == NULL) 1667 return -1; 1668 1669 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1670 thread__find_map(thread, sample->cpumode, sample->ip, al); 1671 dump_printf(" ...... dso: %s\n", 1672 al->map ? al->map->dso->long_name : 1673 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1674 1675 if (thread__is_filtered(thread)) 1676 al->filtered |= (1 << HIST_FILTER__THREAD); 1677 1678 al->sym = NULL; 1679 al->cpu = sample->cpu; 1680 al->socket = -1; 1681 al->srcline = NULL; 1682 1683 if (al->cpu >= 0) { 1684 struct perf_env *env = machine->env; 1685 1686 if (env && env->cpu) 1687 al->socket = env->cpu[al->cpu].socket_id; 1688 } 1689 1690 if (al->map) { 1691 struct dso *dso = al->map->dso; 1692 1693 if (symbol_conf.dso_list && 1694 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1695 dso->short_name) || 1696 (dso->short_name != dso->long_name && 1697 strlist__has_entry(symbol_conf.dso_list, 1698 dso->long_name))))) { 1699 al->filtered |= (1 << HIST_FILTER__DSO); 1700 } 1701 1702 al->sym = map__find_symbol(al->map, al->addr); 1703 } 1704 1705 if (symbol_conf.sym_list && 1706 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1707 al->sym->name))) { 1708 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1709 } 1710 1711 return 0; 1712 } 1713 1714 /* 1715 * The preprocess_sample method will return with reference counts for the 1716 * in it, when done using (and perhaps getting ref counts if needing to 1717 * keep a pointer to one of those entries) it must be paired with 1718 * addr_location__put(), so that the refcounts can be decremented. 1719 */ 1720 void addr_location__put(struct addr_location *al) 1721 { 1722 thread__zput(al->thread); 1723 } 1724 1725 bool is_bts_event(struct perf_event_attr *attr) 1726 { 1727 return attr->type == PERF_TYPE_HARDWARE && 1728 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1729 attr->sample_period == 1; 1730 } 1731 1732 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1733 { 1734 if (attr->type == PERF_TYPE_SOFTWARE && 1735 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1736 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1737 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1738 return true; 1739 1740 if (is_bts_event(attr)) 1741 return true; 1742 1743 return false; 1744 } 1745 1746 void thread__resolve(struct thread *thread, struct addr_location *al, 1747 struct perf_sample *sample) 1748 { 1749 thread__find_map_fb(thread, sample->cpumode, sample->addr, al); 1750 1751 al->cpu = sample->cpu; 1752 al->sym = NULL; 1753 1754 if (al->map) 1755 al->sym = map__find_symbol(al->map, al->addr); 1756 } 1757