1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include "util/debug.h" 4 #include "util/dso.h" 5 #include "util/event.h" 6 #include "util/evlist.h" 7 #include "util/machine.h" 8 #include "util/map.h" 9 #include "util/map_symbol.h" 10 #include "util/branch.h" 11 #include "util/memswap.h" 12 #include "util/namespaces.h" 13 #include "util/session.h" 14 #include "util/stat.h" 15 #include "util/symbol.h" 16 #include "util/synthetic-events.h" 17 #include "util/target.h" 18 #include "util/time-utils.h" 19 #include <linux/bitops.h> 20 #include <linux/kernel.h> 21 #include <linux/string.h> 22 #include <linux/zalloc.h> 23 #include <linux/perf_event.h> 24 #include <asm/bug.h> 25 #include <perf/evsel.h> 26 #include <internal/cpumap.h> 27 #include <perf/cpumap.h> 28 #include <internal/lib.h> // page_size 29 #include <internal/threadmap.h> 30 #include <perf/threadmap.h> 31 #include <symbol/kallsyms.h> 32 #include <dirent.h> 33 #include <errno.h> 34 #include <inttypes.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */ 38 #include <api/fs/fs.h> 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <fcntl.h> 42 #include <unistd.h> 43 44 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500 45 46 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT; 47 48 int perf_tool__process_synth_event(struct perf_tool *tool, 49 union perf_event *event, 50 struct machine *machine, 51 perf_event__handler_t process) 52 { 53 struct perf_sample synth_sample = { 54 .pid = -1, 55 .tid = -1, 56 .time = -1, 57 .stream_id = -1, 58 .cpu = -1, 59 .period = 1, 60 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, 61 }; 62 63 return process(tool, event, &synth_sample, machine); 64 }; 65 66 /* 67 * Assumes that the first 4095 bytes of /proc/pid/stat contains 68 * the comm, tgid and ppid. 69 */ 70 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 71 pid_t *tgid, pid_t *ppid) 72 { 73 char filename[PATH_MAX]; 74 char bf[4096]; 75 int fd; 76 size_t size = 0; 77 ssize_t n; 78 char *name, *tgids, *ppids; 79 80 *tgid = -1; 81 *ppid = -1; 82 83 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 84 85 fd = open(filename, O_RDONLY); 86 if (fd < 0) { 87 pr_debug("couldn't open %s\n", filename); 88 return -1; 89 } 90 91 n = read(fd, bf, sizeof(bf) - 1); 92 close(fd); 93 if (n <= 0) { 94 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 95 pid); 96 return -1; 97 } 98 bf[n] = '\0'; 99 100 name = strstr(bf, "Name:"); 101 tgids = strstr(bf, "Tgid:"); 102 ppids = strstr(bf, "PPid:"); 103 104 if (name) { 105 char *nl; 106 107 name = skip_spaces(name + 5); /* strlen("Name:") */ 108 nl = strchr(name, '\n'); 109 if (nl) 110 *nl = '\0'; 111 112 size = strlen(name); 113 if (size >= len) 114 size = len - 1; 115 memcpy(comm, name, size); 116 comm[size] = '\0'; 117 } else { 118 pr_debug("Name: string not found for pid %d\n", pid); 119 } 120 121 if (tgids) { 122 tgids += 5; /* strlen("Tgid:") */ 123 *tgid = atoi(tgids); 124 } else { 125 pr_debug("Tgid: string not found for pid %d\n", pid); 126 } 127 128 if (ppids) { 129 ppids += 5; /* strlen("PPid:") */ 130 *ppid = atoi(ppids); 131 } else { 132 pr_debug("PPid: string not found for pid %d\n", pid); 133 } 134 135 return 0; 136 } 137 138 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 139 struct machine *machine, 140 pid_t *tgid, pid_t *ppid) 141 { 142 size_t size; 143 144 *ppid = -1; 145 146 memset(&event->comm, 0, sizeof(event->comm)); 147 148 if (machine__is_host(machine)) { 149 if (perf_event__get_comm_ids(pid, event->comm.comm, 150 sizeof(event->comm.comm), 151 tgid, ppid) != 0) { 152 return -1; 153 } 154 } else { 155 *tgid = machine->pid; 156 } 157 158 if (*tgid < 0) 159 return -1; 160 161 event->comm.pid = *tgid; 162 event->comm.header.type = PERF_RECORD_COMM; 163 164 size = strlen(event->comm.comm) + 1; 165 size = PERF_ALIGN(size, sizeof(u64)); 166 memset(event->comm.comm + size, 0, machine->id_hdr_size); 167 event->comm.header.size = (sizeof(event->comm) - 168 (sizeof(event->comm.comm) - size) + 169 machine->id_hdr_size); 170 event->comm.tid = pid; 171 172 return 0; 173 } 174 175 pid_t perf_event__synthesize_comm(struct perf_tool *tool, 176 union perf_event *event, pid_t pid, 177 perf_event__handler_t process, 178 struct machine *machine) 179 { 180 pid_t tgid, ppid; 181 182 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 183 return -1; 184 185 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 186 return -1; 187 188 return tgid; 189 } 190 191 static void perf_event__get_ns_link_info(pid_t pid, const char *ns, 192 struct perf_ns_link_info *ns_link_info) 193 { 194 struct stat64 st; 195 char proc_ns[128]; 196 197 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns); 198 if (stat64(proc_ns, &st) == 0) { 199 ns_link_info->dev = st.st_dev; 200 ns_link_info->ino = st.st_ino; 201 } 202 } 203 204 int perf_event__synthesize_namespaces(struct perf_tool *tool, 205 union perf_event *event, 206 pid_t pid, pid_t tgid, 207 perf_event__handler_t process, 208 struct machine *machine) 209 { 210 u32 idx; 211 struct perf_ns_link_info *ns_link_info; 212 213 if (!tool || !tool->namespace_events) 214 return 0; 215 216 memset(&event->namespaces, 0, (sizeof(event->namespaces) + 217 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 218 machine->id_hdr_size)); 219 220 event->namespaces.pid = tgid; 221 event->namespaces.tid = pid; 222 223 event->namespaces.nr_namespaces = NR_NAMESPACES; 224 225 ns_link_info = event->namespaces.link_info; 226 227 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++) 228 perf_event__get_ns_link_info(pid, perf_ns__name(idx), 229 &ns_link_info[idx]); 230 231 event->namespaces.header.type = PERF_RECORD_NAMESPACES; 232 233 event->namespaces.header.size = (sizeof(event->namespaces) + 234 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 235 machine->id_hdr_size); 236 237 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 238 return -1; 239 240 return 0; 241 } 242 243 static int perf_event__synthesize_fork(struct perf_tool *tool, 244 union perf_event *event, 245 pid_t pid, pid_t tgid, pid_t ppid, 246 perf_event__handler_t process, 247 struct machine *machine) 248 { 249 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 250 251 /* 252 * for main thread set parent to ppid from status file. For other 253 * threads set parent pid to main thread. ie., assume main thread 254 * spawns all threads in a process 255 */ 256 if (tgid == pid) { 257 event->fork.ppid = ppid; 258 event->fork.ptid = ppid; 259 } else { 260 event->fork.ppid = tgid; 261 event->fork.ptid = tgid; 262 } 263 event->fork.pid = tgid; 264 event->fork.tid = pid; 265 event->fork.header.type = PERF_RECORD_FORK; 266 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC; 267 268 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 269 270 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 271 return -1; 272 273 return 0; 274 } 275 276 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 277 union perf_event *event, 278 pid_t pid, pid_t tgid, 279 perf_event__handler_t process, 280 struct machine *machine, 281 bool mmap_data) 282 { 283 char filename[PATH_MAX]; 284 FILE *fp; 285 unsigned long long t; 286 bool truncation = false; 287 unsigned long long timeout = proc_map_timeout * 1000000ULL; 288 int rc = 0; 289 const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); 290 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; 291 292 if (machine__is_default_guest(machine)) 293 return 0; 294 295 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps", 296 machine->root_dir, pid, pid); 297 298 fp = fopen(filename, "r"); 299 if (fp == NULL) { 300 /* 301 * We raced with a task exiting - just return: 302 */ 303 pr_debug("couldn't open %s\n", filename); 304 return -1; 305 } 306 307 event->header.type = PERF_RECORD_MMAP2; 308 t = rdclock(); 309 310 while (1) { 311 char bf[BUFSIZ]; 312 char prot[5]; 313 char execname[PATH_MAX]; 314 char anonstr[] = "//anon"; 315 unsigned int ino; 316 size_t size; 317 ssize_t n; 318 319 if (fgets(bf, sizeof(bf), fp) == NULL) 320 break; 321 322 if ((rdclock() - t) > timeout) { 323 pr_warning("Reading %s time out. " 324 "You may want to increase " 325 "the time limit by --proc-map-timeout\n", 326 filename); 327 truncation = true; 328 goto out; 329 } 330 331 /* ensure null termination since stack will be reused. */ 332 strcpy(execname, ""); 333 334 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 335 n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n", 336 &event->mmap2.start, &event->mmap2.len, prot, 337 &event->mmap2.pgoff, &event->mmap2.maj, 338 &event->mmap2.min, 339 &ino, execname); 340 341 /* 342 * Anon maps don't have the execname. 343 */ 344 if (n < 7) 345 continue; 346 347 event->mmap2.ino = (u64)ino; 348 349 /* 350 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 351 */ 352 if (machine__is_host(machine)) 353 event->header.misc = PERF_RECORD_MISC_USER; 354 else 355 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 356 357 /* map protection and flags bits */ 358 event->mmap2.prot = 0; 359 event->mmap2.flags = 0; 360 if (prot[0] == 'r') 361 event->mmap2.prot |= PROT_READ; 362 if (prot[1] == 'w') 363 event->mmap2.prot |= PROT_WRITE; 364 if (prot[2] == 'x') 365 event->mmap2.prot |= PROT_EXEC; 366 367 if (prot[3] == 's') 368 event->mmap2.flags |= MAP_SHARED; 369 else 370 event->mmap2.flags |= MAP_PRIVATE; 371 372 if (prot[2] != 'x') { 373 if (!mmap_data || prot[0] != 'r') 374 continue; 375 376 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 377 } 378 379 out: 380 if (truncation) 381 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; 382 383 if (!strcmp(execname, "")) 384 strcpy(execname, anonstr); 385 386 if (hugetlbfs_mnt_len && 387 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { 388 strcpy(execname, anonstr); 389 event->mmap2.flags |= MAP_HUGETLB; 390 } 391 392 size = strlen(execname) + 1; 393 memcpy(event->mmap2.filename, execname, size); 394 size = PERF_ALIGN(size, sizeof(u64)); 395 event->mmap2.len -= event->mmap.start; 396 event->mmap2.header.size = (sizeof(event->mmap2) - 397 (sizeof(event->mmap2.filename) - size)); 398 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 399 event->mmap2.header.size += machine->id_hdr_size; 400 event->mmap2.pid = tgid; 401 event->mmap2.tid = pid; 402 403 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 404 rc = -1; 405 break; 406 } 407 408 if (truncation) 409 break; 410 } 411 412 fclose(fp); 413 return rc; 414 } 415 416 int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process, 417 struct machine *machine) 418 { 419 int rc = 0; 420 struct map *pos; 421 struct maps *maps = machine__kernel_maps(machine); 422 union perf_event *event = zalloc((sizeof(event->mmap) + 423 machine->id_hdr_size)); 424 if (event == NULL) { 425 pr_debug("Not enough memory synthesizing mmap event " 426 "for kernel modules\n"); 427 return -1; 428 } 429 430 event->header.type = PERF_RECORD_MMAP; 431 432 /* 433 * kernel uses 0 for user space maps, see kernel/perf_event.c 434 * __perf_event_mmap 435 */ 436 if (machine__is_host(machine)) 437 event->header.misc = PERF_RECORD_MISC_KERNEL; 438 else 439 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 440 441 maps__for_each_entry(maps, pos) { 442 size_t size; 443 444 if (!__map__is_kmodule(pos)) 445 continue; 446 447 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 448 event->mmap.header.type = PERF_RECORD_MMAP; 449 event->mmap.header.size = (sizeof(event->mmap) - 450 (sizeof(event->mmap.filename) - size)); 451 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 452 event->mmap.header.size += machine->id_hdr_size; 453 event->mmap.start = pos->start; 454 event->mmap.len = pos->end - pos->start; 455 event->mmap.pid = machine->pid; 456 457 memcpy(event->mmap.filename, pos->dso->long_name, 458 pos->dso->long_name_len + 1); 459 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 460 rc = -1; 461 break; 462 } 463 } 464 465 free(event); 466 return rc; 467 } 468 469 static int __event__synthesize_thread(union perf_event *comm_event, 470 union perf_event *mmap_event, 471 union perf_event *fork_event, 472 union perf_event *namespaces_event, 473 pid_t pid, int full, perf_event__handler_t process, 474 struct perf_tool *tool, struct machine *machine, bool mmap_data) 475 { 476 char filename[PATH_MAX]; 477 DIR *tasks; 478 struct dirent *dirent; 479 pid_t tgid, ppid; 480 int rc = 0; 481 482 /* special case: only send one comm event using passed in pid */ 483 if (!full) { 484 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 485 process, machine); 486 487 if (tgid == -1) 488 return -1; 489 490 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid, 491 tgid, process, machine) < 0) 492 return -1; 493 494 /* 495 * send mmap only for thread group leader 496 * see thread__init_maps() 497 */ 498 if (pid == tgid && 499 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 500 process, machine, mmap_data)) 501 return -1; 502 503 return 0; 504 } 505 506 if (machine__is_default_guest(machine)) 507 return 0; 508 509 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 510 machine->root_dir, pid); 511 512 tasks = opendir(filename); 513 if (tasks == NULL) { 514 pr_debug("couldn't open %s\n", filename); 515 return 0; 516 } 517 518 while ((dirent = readdir(tasks)) != NULL) { 519 char *end; 520 pid_t _pid; 521 522 _pid = strtol(dirent->d_name, &end, 10); 523 if (*end) 524 continue; 525 526 rc = -1; 527 if (perf_event__prepare_comm(comm_event, _pid, machine, 528 &tgid, &ppid) != 0) 529 break; 530 531 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 532 ppid, process, machine) < 0) 533 break; 534 535 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid, 536 tgid, process, machine) < 0) 537 break; 538 539 /* 540 * Send the prepared comm event 541 */ 542 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) 543 break; 544 545 rc = 0; 546 if (_pid == pid) { 547 /* process the parent's maps too */ 548 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 549 process, machine, mmap_data); 550 if (rc) 551 break; 552 } 553 } 554 555 closedir(tasks); 556 return rc; 557 } 558 559 int perf_event__synthesize_thread_map(struct perf_tool *tool, 560 struct perf_thread_map *threads, 561 perf_event__handler_t process, 562 struct machine *machine, 563 bool mmap_data) 564 { 565 union perf_event *comm_event, *mmap_event, *fork_event; 566 union perf_event *namespaces_event; 567 int err = -1, thread, j; 568 569 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 570 if (comm_event == NULL) 571 goto out; 572 573 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 574 if (mmap_event == NULL) 575 goto out_free_comm; 576 577 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 578 if (fork_event == NULL) 579 goto out_free_mmap; 580 581 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 582 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 583 machine->id_hdr_size); 584 if (namespaces_event == NULL) 585 goto out_free_fork; 586 587 err = 0; 588 for (thread = 0; thread < threads->nr; ++thread) { 589 if (__event__synthesize_thread(comm_event, mmap_event, 590 fork_event, namespaces_event, 591 perf_thread_map__pid(threads, thread), 0, 592 process, tool, machine, 593 mmap_data)) { 594 err = -1; 595 break; 596 } 597 598 /* 599 * comm.pid is set to thread group id by 600 * perf_event__synthesize_comm 601 */ 602 if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) { 603 bool need_leader = true; 604 605 /* is thread group leader in thread_map? */ 606 for (j = 0; j < threads->nr; ++j) { 607 if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) { 608 need_leader = false; 609 break; 610 } 611 } 612 613 /* if not, generate events for it */ 614 if (need_leader && 615 __event__synthesize_thread(comm_event, mmap_event, 616 fork_event, namespaces_event, 617 comm_event->comm.pid, 0, 618 process, tool, machine, 619 mmap_data)) { 620 err = -1; 621 break; 622 } 623 } 624 } 625 free(namespaces_event); 626 out_free_fork: 627 free(fork_event); 628 out_free_mmap: 629 free(mmap_event); 630 out_free_comm: 631 free(comm_event); 632 out: 633 return err; 634 } 635 636 static int __perf_event__synthesize_threads(struct perf_tool *tool, 637 perf_event__handler_t process, 638 struct machine *machine, 639 bool mmap_data, 640 struct dirent **dirent, 641 int start, 642 int num) 643 { 644 union perf_event *comm_event, *mmap_event, *fork_event; 645 union perf_event *namespaces_event; 646 int err = -1; 647 char *end; 648 pid_t pid; 649 int i; 650 651 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 652 if (comm_event == NULL) 653 goto out; 654 655 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 656 if (mmap_event == NULL) 657 goto out_free_comm; 658 659 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 660 if (fork_event == NULL) 661 goto out_free_mmap; 662 663 namespaces_event = malloc(sizeof(namespaces_event->namespaces) + 664 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + 665 machine->id_hdr_size); 666 if (namespaces_event == NULL) 667 goto out_free_fork; 668 669 for (i = start; i < start + num; i++) { 670 if (!isdigit(dirent[i]->d_name[0])) 671 continue; 672 673 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); 674 /* only interested in proper numerical dirents */ 675 if (*end) 676 continue; 677 /* 678 * We may race with exiting thread, so don't stop just because 679 * one thread couldn't be synthesized. 680 */ 681 __event__synthesize_thread(comm_event, mmap_event, fork_event, 682 namespaces_event, pid, 1, process, 683 tool, machine, mmap_data); 684 } 685 err = 0; 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 struct synthesize_threads_arg { 699 struct perf_tool *tool; 700 perf_event__handler_t process; 701 struct machine *machine; 702 bool mmap_data; 703 struct dirent **dirent; 704 int num; 705 int start; 706 }; 707 708 static void *synthesize_threads_worker(void *arg) 709 { 710 struct synthesize_threads_arg *args = arg; 711 712 __perf_event__synthesize_threads(args->tool, args->process, 713 args->machine, args->mmap_data, 714 args->dirent, 715 args->start, args->num); 716 return NULL; 717 } 718 719 int perf_event__synthesize_threads(struct perf_tool *tool, 720 perf_event__handler_t process, 721 struct machine *machine, 722 bool mmap_data, 723 unsigned int nr_threads_synthesize) 724 { 725 struct synthesize_threads_arg *args = NULL; 726 pthread_t *synthesize_threads = NULL; 727 char proc_path[PATH_MAX]; 728 struct dirent **dirent; 729 int num_per_thread; 730 int m, n, i, j; 731 int thread_nr; 732 int base = 0; 733 int err = -1; 734 735 736 if (machine__is_default_guest(machine)) 737 return 0; 738 739 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 740 n = scandir(proc_path, &dirent, 0, alphasort); 741 if (n < 0) 742 return err; 743 744 if (nr_threads_synthesize == UINT_MAX) 745 thread_nr = sysconf(_SC_NPROCESSORS_ONLN); 746 else 747 thread_nr = nr_threads_synthesize; 748 749 if (thread_nr <= 1) { 750 err = __perf_event__synthesize_threads(tool, process, 751 machine, mmap_data, 752 dirent, base, n); 753 goto free_dirent; 754 } 755 if (thread_nr > n) 756 thread_nr = n; 757 758 synthesize_threads = calloc(sizeof(pthread_t), thread_nr); 759 if (synthesize_threads == NULL) 760 goto free_dirent; 761 762 args = calloc(sizeof(*args), thread_nr); 763 if (args == NULL) 764 goto free_threads; 765 766 num_per_thread = n / thread_nr; 767 m = n % thread_nr; 768 for (i = 0; i < thread_nr; i++) { 769 args[i].tool = tool; 770 args[i].process = process; 771 args[i].machine = machine; 772 args[i].mmap_data = mmap_data; 773 args[i].dirent = dirent; 774 } 775 for (i = 0; i < m; i++) { 776 args[i].num = num_per_thread + 1; 777 args[i].start = i * args[i].num; 778 } 779 if (i != 0) 780 base = args[i-1].start + args[i-1].num; 781 for (j = i; j < thread_nr; j++) { 782 args[j].num = num_per_thread; 783 args[j].start = base + (j - i) * args[i].num; 784 } 785 786 for (i = 0; i < thread_nr; i++) { 787 if (pthread_create(&synthesize_threads[i], NULL, 788 synthesize_threads_worker, &args[i])) 789 goto out_join; 790 } 791 err = 0; 792 out_join: 793 for (i = 0; i < thread_nr; i++) 794 pthread_join(synthesize_threads[i], NULL); 795 free(args); 796 free_threads: 797 free(synthesize_threads); 798 free_dirent: 799 for (i = 0; i < n; i++) 800 zfree(&dirent[i]); 801 free(dirent); 802 803 return err; 804 } 805 806 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused, 807 perf_event__handler_t process __maybe_unused, 808 struct machine *machine __maybe_unused) 809 { 810 return 0; 811 } 812 813 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 814 perf_event__handler_t process, 815 struct machine *machine) 816 { 817 size_t size; 818 struct map *map = machine__kernel_map(machine); 819 struct kmap *kmap; 820 int err; 821 union perf_event *event; 822 823 if (map == NULL) 824 return -1; 825 826 kmap = map__kmap(map); 827 if (!kmap->ref_reloc_sym) 828 return -1; 829 830 /* 831 * We should get this from /sys/kernel/sections/.text, but till that is 832 * available use this, and after it is use this as a fallback for older 833 * kernels. 834 */ 835 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 836 if (event == NULL) { 837 pr_debug("Not enough memory synthesizing mmap event " 838 "for kernel modules\n"); 839 return -1; 840 } 841 842 if (machine__is_host(machine)) { 843 /* 844 * kernel uses PERF_RECORD_MISC_USER for user space maps, 845 * see kernel/perf_event.c __perf_event_mmap 846 */ 847 event->header.misc = PERF_RECORD_MISC_KERNEL; 848 } else { 849 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 850 } 851 852 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 853 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; 854 size = PERF_ALIGN(size, sizeof(u64)); 855 event->mmap.header.type = PERF_RECORD_MMAP; 856 event->mmap.header.size = (sizeof(event->mmap) - 857 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 858 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 859 event->mmap.start = map->start; 860 event->mmap.len = map->end - event->mmap.start; 861 event->mmap.pid = machine->pid; 862 863 err = perf_tool__process_synth_event(tool, event, machine, process); 864 free(event); 865 866 return err; 867 } 868 869 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 870 perf_event__handler_t process, 871 struct machine *machine) 872 { 873 int err; 874 875 err = __perf_event__synthesize_kernel_mmap(tool, process, machine); 876 if (err < 0) 877 return err; 878 879 return perf_event__synthesize_extra_kmaps(tool, process, machine); 880 } 881 882 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 883 struct perf_thread_map *threads, 884 perf_event__handler_t process, 885 struct machine *machine) 886 { 887 union perf_event *event; 888 int i, err, size; 889 890 size = sizeof(event->thread_map); 891 size += threads->nr * sizeof(event->thread_map.entries[0]); 892 893 event = zalloc(size); 894 if (!event) 895 return -ENOMEM; 896 897 event->header.type = PERF_RECORD_THREAD_MAP; 898 event->header.size = size; 899 event->thread_map.nr = threads->nr; 900 901 for (i = 0; i < threads->nr; i++) { 902 struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i]; 903 char *comm = perf_thread_map__comm(threads, i); 904 905 if (!comm) 906 comm = (char *) ""; 907 908 entry->pid = perf_thread_map__pid(threads, i); 909 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 910 } 911 912 err = process(tool, event, NULL, machine); 913 914 free(event); 915 return err; 916 } 917 918 static void synthesize_cpus(struct cpu_map_entries *cpus, 919 struct perf_cpu_map *map) 920 { 921 int i; 922 923 cpus->nr = map->nr; 924 925 for (i = 0; i < map->nr; i++) 926 cpus->cpu[i] = map->map[i]; 927 } 928 929 static void synthesize_mask(struct perf_record_record_cpu_map *mask, 930 struct perf_cpu_map *map, int max) 931 { 932 int i; 933 934 mask->nr = BITS_TO_LONGS(max); 935 mask->long_size = sizeof(long); 936 937 for (i = 0; i < map->nr; i++) 938 set_bit(map->map[i], mask->mask); 939 } 940 941 static size_t cpus_size(struct perf_cpu_map *map) 942 { 943 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 944 } 945 946 static size_t mask_size(struct perf_cpu_map *map, int *max) 947 { 948 int i; 949 950 *max = 0; 951 952 for (i = 0; i < map->nr; i++) { 953 /* bit possition of the cpu is + 1 */ 954 int bit = map->map[i] + 1; 955 956 if (bit > *max) 957 *max = bit; 958 } 959 960 return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long); 961 } 962 963 void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max) 964 { 965 size_t size_cpus, size_mask; 966 bool is_dummy = perf_cpu_map__empty(map); 967 968 /* 969 * Both array and mask data have variable size based 970 * on the number of cpus and their actual values. 971 * The size of the 'struct perf_record_cpu_map_data' is: 972 * 973 * array = size of 'struct cpu_map_entries' + 974 * number of cpus * sizeof(u64) 975 * 976 * mask = size of 'struct perf_record_record_cpu_map' + 977 * maximum cpu bit converted to size of longs 978 * 979 * and finaly + the size of 'struct perf_record_cpu_map_data'. 980 */ 981 size_cpus = cpus_size(map); 982 size_mask = mask_size(map, max); 983 984 if (is_dummy || (size_cpus < size_mask)) { 985 *size += size_cpus; 986 *type = PERF_CPU_MAP__CPUS; 987 } else { 988 *size += size_mask; 989 *type = PERF_CPU_MAP__MASK; 990 } 991 992 *size += sizeof(struct perf_record_cpu_map_data); 993 *size = PERF_ALIGN(*size, sizeof(u64)); 994 return zalloc(*size); 995 } 996 997 void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map, 998 u16 type, int max) 999 { 1000 data->type = type; 1001 1002 switch (type) { 1003 case PERF_CPU_MAP__CPUS: 1004 synthesize_cpus((struct cpu_map_entries *) data->data, map); 1005 break; 1006 case PERF_CPU_MAP__MASK: 1007 synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max); 1008 default: 1009 break; 1010 }; 1011 } 1012 1013 static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map) 1014 { 1015 size_t size = sizeof(struct perf_record_cpu_map); 1016 struct perf_record_cpu_map *event; 1017 int max; 1018 u16 type; 1019 1020 event = cpu_map_data__alloc(map, &size, &type, &max); 1021 if (!event) 1022 return NULL; 1023 1024 event->header.type = PERF_RECORD_CPU_MAP; 1025 event->header.size = size; 1026 event->data.type = type; 1027 1028 cpu_map_data__synthesize(&event->data, map, type, max); 1029 return event; 1030 } 1031 1032 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 1033 struct perf_cpu_map *map, 1034 perf_event__handler_t process, 1035 struct machine *machine) 1036 { 1037 struct perf_record_cpu_map *event; 1038 int err; 1039 1040 event = cpu_map_event__new(map); 1041 if (!event) 1042 return -ENOMEM; 1043 1044 err = process(tool, (union perf_event *) event, NULL, machine); 1045 1046 free(event); 1047 return err; 1048 } 1049 1050 int perf_event__synthesize_stat_config(struct perf_tool *tool, 1051 struct perf_stat_config *config, 1052 perf_event__handler_t process, 1053 struct machine *machine) 1054 { 1055 struct perf_record_stat_config *event; 1056 int size, i = 0, err; 1057 1058 size = sizeof(*event); 1059 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 1060 1061 event = zalloc(size); 1062 if (!event) 1063 return -ENOMEM; 1064 1065 event->header.type = PERF_RECORD_STAT_CONFIG; 1066 event->header.size = size; 1067 event->nr = PERF_STAT_CONFIG_TERM__MAX; 1068 1069 #define ADD(__term, __val) \ 1070 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 1071 event->data[i].val = __val; \ 1072 i++; 1073 1074 ADD(AGGR_MODE, config->aggr_mode) 1075 ADD(INTERVAL, config->interval) 1076 ADD(SCALE, config->scale) 1077 1078 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 1079 "stat config terms unbalanced\n"); 1080 #undef ADD 1081 1082 err = process(tool, (union perf_event *) event, NULL, machine); 1083 1084 free(event); 1085 return err; 1086 } 1087 1088 int perf_event__synthesize_stat(struct perf_tool *tool, 1089 u32 cpu, u32 thread, u64 id, 1090 struct perf_counts_values *count, 1091 perf_event__handler_t process, 1092 struct machine *machine) 1093 { 1094 struct perf_record_stat event; 1095 1096 event.header.type = PERF_RECORD_STAT; 1097 event.header.size = sizeof(event); 1098 event.header.misc = 0; 1099 1100 event.id = id; 1101 event.cpu = cpu; 1102 event.thread = thread; 1103 event.val = count->val; 1104 event.ena = count->ena; 1105 event.run = count->run; 1106 1107 return process(tool, (union perf_event *) &event, NULL, machine); 1108 } 1109 1110 int perf_event__synthesize_stat_round(struct perf_tool *tool, 1111 u64 evtime, u64 type, 1112 perf_event__handler_t process, 1113 struct machine *machine) 1114 { 1115 struct perf_record_stat_round event; 1116 1117 event.header.type = PERF_RECORD_STAT_ROUND; 1118 event.header.size = sizeof(event); 1119 event.header.misc = 0; 1120 1121 event.time = evtime; 1122 event.type = type; 1123 1124 return process(tool, (union perf_event *) &event, NULL, machine); 1125 } 1126 1127 size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format) 1128 { 1129 size_t sz, result = sizeof(struct perf_record_sample); 1130 1131 if (type & PERF_SAMPLE_IDENTIFIER) 1132 result += sizeof(u64); 1133 1134 if (type & PERF_SAMPLE_IP) 1135 result += sizeof(u64); 1136 1137 if (type & PERF_SAMPLE_TID) 1138 result += sizeof(u64); 1139 1140 if (type & PERF_SAMPLE_TIME) 1141 result += sizeof(u64); 1142 1143 if (type & PERF_SAMPLE_ADDR) 1144 result += sizeof(u64); 1145 1146 if (type & PERF_SAMPLE_ID) 1147 result += sizeof(u64); 1148 1149 if (type & PERF_SAMPLE_STREAM_ID) 1150 result += sizeof(u64); 1151 1152 if (type & PERF_SAMPLE_CPU) 1153 result += sizeof(u64); 1154 1155 if (type & PERF_SAMPLE_PERIOD) 1156 result += sizeof(u64); 1157 1158 if (type & PERF_SAMPLE_READ) { 1159 result += sizeof(u64); 1160 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1161 result += sizeof(u64); 1162 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1163 result += sizeof(u64); 1164 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ 1165 if (read_format & PERF_FORMAT_GROUP) { 1166 sz = sample->read.group.nr * 1167 sizeof(struct sample_read_value); 1168 result += sz; 1169 } else { 1170 result += sizeof(u64); 1171 } 1172 } 1173 1174 if (type & PERF_SAMPLE_CALLCHAIN) { 1175 sz = (sample->callchain->nr + 1) * sizeof(u64); 1176 result += sz; 1177 } 1178 1179 if (type & PERF_SAMPLE_RAW) { 1180 result += sizeof(u32); 1181 result += sample->raw_size; 1182 } 1183 1184 if (type & PERF_SAMPLE_BRANCH_STACK) { 1185 sz = sample->branch_stack->nr * sizeof(struct branch_entry); 1186 sz += sizeof(u64); 1187 result += sz; 1188 } 1189 1190 if (type & PERF_SAMPLE_REGS_USER) { 1191 if (sample->user_regs.abi) { 1192 result += sizeof(u64); 1193 sz = hweight64(sample->user_regs.mask) * sizeof(u64); 1194 result += sz; 1195 } else { 1196 result += sizeof(u64); 1197 } 1198 } 1199 1200 if (type & PERF_SAMPLE_STACK_USER) { 1201 sz = sample->user_stack.size; 1202 result += sizeof(u64); 1203 if (sz) { 1204 result += sz; 1205 result += sizeof(u64); 1206 } 1207 } 1208 1209 if (type & PERF_SAMPLE_WEIGHT) 1210 result += sizeof(u64); 1211 1212 if (type & PERF_SAMPLE_DATA_SRC) 1213 result += sizeof(u64); 1214 1215 if (type & PERF_SAMPLE_TRANSACTION) 1216 result += sizeof(u64); 1217 1218 if (type & PERF_SAMPLE_REGS_INTR) { 1219 if (sample->intr_regs.abi) { 1220 result += sizeof(u64); 1221 sz = hweight64(sample->intr_regs.mask) * sizeof(u64); 1222 result += sz; 1223 } else { 1224 result += sizeof(u64); 1225 } 1226 } 1227 1228 if (type & PERF_SAMPLE_PHYS_ADDR) 1229 result += sizeof(u64); 1230 1231 if (type & PERF_SAMPLE_AUX) { 1232 result += sizeof(u64); 1233 result += sample->aux_sample.size; 1234 } 1235 1236 return result; 1237 } 1238 1239 int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format, 1240 const struct perf_sample *sample) 1241 { 1242 __u64 *array; 1243 size_t sz; 1244 /* 1245 * used for cross-endian analysis. See git commit 65014ab3 1246 * for why this goofiness is needed. 1247 */ 1248 union u64_swap u; 1249 1250 array = event->sample.array; 1251 1252 if (type & PERF_SAMPLE_IDENTIFIER) { 1253 *array = sample->id; 1254 array++; 1255 } 1256 1257 if (type & PERF_SAMPLE_IP) { 1258 *array = sample->ip; 1259 array++; 1260 } 1261 1262 if (type & PERF_SAMPLE_TID) { 1263 u.val32[0] = sample->pid; 1264 u.val32[1] = sample->tid; 1265 *array = u.val64; 1266 array++; 1267 } 1268 1269 if (type & PERF_SAMPLE_TIME) { 1270 *array = sample->time; 1271 array++; 1272 } 1273 1274 if (type & PERF_SAMPLE_ADDR) { 1275 *array = sample->addr; 1276 array++; 1277 } 1278 1279 if (type & PERF_SAMPLE_ID) { 1280 *array = sample->id; 1281 array++; 1282 } 1283 1284 if (type & PERF_SAMPLE_STREAM_ID) { 1285 *array = sample->stream_id; 1286 array++; 1287 } 1288 1289 if (type & PERF_SAMPLE_CPU) { 1290 u.val32[0] = sample->cpu; 1291 u.val32[1] = 0; 1292 *array = u.val64; 1293 array++; 1294 } 1295 1296 if (type & PERF_SAMPLE_PERIOD) { 1297 *array = sample->period; 1298 array++; 1299 } 1300 1301 if (type & PERF_SAMPLE_READ) { 1302 if (read_format & PERF_FORMAT_GROUP) 1303 *array = sample->read.group.nr; 1304 else 1305 *array = sample->read.one.value; 1306 array++; 1307 1308 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { 1309 *array = sample->read.time_enabled; 1310 array++; 1311 } 1312 1313 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { 1314 *array = sample->read.time_running; 1315 array++; 1316 } 1317 1318 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ 1319 if (read_format & PERF_FORMAT_GROUP) { 1320 sz = sample->read.group.nr * 1321 sizeof(struct sample_read_value); 1322 memcpy(array, sample->read.group.values, sz); 1323 array = (void *)array + sz; 1324 } else { 1325 *array = sample->read.one.id; 1326 array++; 1327 } 1328 } 1329 1330 if (type & PERF_SAMPLE_CALLCHAIN) { 1331 sz = (sample->callchain->nr + 1) * sizeof(u64); 1332 memcpy(array, sample->callchain, sz); 1333 array = (void *)array + sz; 1334 } 1335 1336 if (type & PERF_SAMPLE_RAW) { 1337 u.val32[0] = sample->raw_size; 1338 *array = u.val64; 1339 array = (void *)array + sizeof(u32); 1340 1341 memcpy(array, sample->raw_data, sample->raw_size); 1342 array = (void *)array + sample->raw_size; 1343 } 1344 1345 if (type & PERF_SAMPLE_BRANCH_STACK) { 1346 sz = sample->branch_stack->nr * sizeof(struct branch_entry); 1347 sz += sizeof(u64); 1348 memcpy(array, sample->branch_stack, sz); 1349 array = (void *)array + sz; 1350 } 1351 1352 if (type & PERF_SAMPLE_REGS_USER) { 1353 if (sample->user_regs.abi) { 1354 *array++ = sample->user_regs.abi; 1355 sz = hweight64(sample->user_regs.mask) * sizeof(u64); 1356 memcpy(array, sample->user_regs.regs, sz); 1357 array = (void *)array + sz; 1358 } else { 1359 *array++ = 0; 1360 } 1361 } 1362 1363 if (type & PERF_SAMPLE_STACK_USER) { 1364 sz = sample->user_stack.size; 1365 *array++ = sz; 1366 if (sz) { 1367 memcpy(array, sample->user_stack.data, sz); 1368 array = (void *)array + sz; 1369 *array++ = sz; 1370 } 1371 } 1372 1373 if (type & PERF_SAMPLE_WEIGHT) { 1374 *array = sample->weight; 1375 array++; 1376 } 1377 1378 if (type & PERF_SAMPLE_DATA_SRC) { 1379 *array = sample->data_src; 1380 array++; 1381 } 1382 1383 if (type & PERF_SAMPLE_TRANSACTION) { 1384 *array = sample->transaction; 1385 array++; 1386 } 1387 1388 if (type & PERF_SAMPLE_REGS_INTR) { 1389 if (sample->intr_regs.abi) { 1390 *array++ = sample->intr_regs.abi; 1391 sz = hweight64(sample->intr_regs.mask) * sizeof(u64); 1392 memcpy(array, sample->intr_regs.regs, sz); 1393 array = (void *)array + sz; 1394 } else { 1395 *array++ = 0; 1396 } 1397 } 1398 1399 if (type & PERF_SAMPLE_PHYS_ADDR) { 1400 *array = sample->phys_addr; 1401 array++; 1402 } 1403 1404 if (type & PERF_SAMPLE_AUX) { 1405 sz = sample->aux_sample.size; 1406 *array++ = sz; 1407 memcpy(array, sample->aux_sample.data, sz); 1408 array = (void *)array + sz; 1409 } 1410 1411 return 0; 1412 } 1413 1414 int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, 1415 struct evlist *evlist, struct machine *machine) 1416 { 1417 union perf_event *ev; 1418 struct evsel *evsel; 1419 size_t nr = 0, i = 0, sz, max_nr, n; 1420 int err; 1421 1422 pr_debug2("Synthesizing id index\n"); 1423 1424 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) / 1425 sizeof(struct id_index_entry); 1426 1427 evlist__for_each_entry(evlist, evsel) 1428 nr += evsel->core.ids; 1429 1430 n = nr > max_nr ? max_nr : nr; 1431 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry); 1432 ev = zalloc(sz); 1433 if (!ev) 1434 return -ENOMEM; 1435 1436 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 1437 ev->id_index.header.size = sz; 1438 ev->id_index.nr = n; 1439 1440 evlist__for_each_entry(evlist, evsel) { 1441 u32 j; 1442 1443 for (j = 0; j < evsel->core.ids; j++) { 1444 struct id_index_entry *e; 1445 struct perf_sample_id *sid; 1446 1447 if (i >= n) { 1448 err = process(tool, ev, NULL, machine); 1449 if (err) 1450 goto out_err; 1451 nr -= n; 1452 i = 0; 1453 } 1454 1455 e = &ev->id_index.entries[i++]; 1456 1457 e->id = evsel->core.id[j]; 1458 1459 sid = perf_evlist__id2sid(evlist, e->id); 1460 if (!sid) { 1461 free(ev); 1462 return -ENOENT; 1463 } 1464 1465 e->idx = sid->idx; 1466 e->cpu = sid->cpu; 1467 e->tid = sid->tid; 1468 } 1469 } 1470 1471 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry); 1472 ev->id_index.header.size = sz; 1473 ev->id_index.nr = nr; 1474 1475 err = process(tool, ev, NULL, machine); 1476 out_err: 1477 free(ev); 1478 1479 return err; 1480 } 1481 1482 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, 1483 struct target *target, struct perf_thread_map *threads, 1484 perf_event__handler_t process, bool data_mmap, 1485 unsigned int nr_threads_synthesize) 1486 { 1487 if (target__has_task(target)) 1488 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); 1489 else if (target__has_cpu(target)) 1490 return perf_event__synthesize_threads(tool, process, 1491 machine, data_mmap, 1492 nr_threads_synthesize); 1493 /* command specified */ 1494 return 0; 1495 } 1496 1497 int machine__synthesize_threads(struct machine *machine, struct target *target, 1498 struct perf_thread_map *threads, bool data_mmap, 1499 unsigned int nr_threads_synthesize) 1500 { 1501 return __machine__synthesize_threads(machine, NULL, target, threads, 1502 perf_event__process, data_mmap, 1503 nr_threads_synthesize); 1504 } 1505 1506 static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id) 1507 { 1508 struct perf_record_event_update *ev; 1509 1510 size += sizeof(*ev); 1511 size = PERF_ALIGN(size, sizeof(u64)); 1512 1513 ev = zalloc(size); 1514 if (ev) { 1515 ev->header.type = PERF_RECORD_EVENT_UPDATE; 1516 ev->header.size = (u16)size; 1517 ev->type = type; 1518 ev->id = id; 1519 } 1520 return ev; 1521 } 1522 1523 int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel, 1524 perf_event__handler_t process) 1525 { 1526 size_t size = strlen(evsel->unit); 1527 struct perf_record_event_update *ev; 1528 int err; 1529 1530 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]); 1531 if (ev == NULL) 1532 return -ENOMEM; 1533 1534 strlcpy(ev->data, evsel->unit, size + 1); 1535 err = process(tool, (union perf_event *)ev, NULL, NULL); 1536 free(ev); 1537 return err; 1538 } 1539 1540 int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel, 1541 perf_event__handler_t process) 1542 { 1543 struct perf_record_event_update *ev; 1544 struct perf_record_event_update_scale *ev_data; 1545 int err; 1546 1547 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]); 1548 if (ev == NULL) 1549 return -ENOMEM; 1550 1551 ev_data = (struct perf_record_event_update_scale *)ev->data; 1552 ev_data->scale = evsel->scale; 1553 err = process(tool, (union perf_event *)ev, NULL, NULL); 1554 free(ev); 1555 return err; 1556 } 1557 1558 int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel, 1559 perf_event__handler_t process) 1560 { 1561 struct perf_record_event_update *ev; 1562 size_t len = strlen(evsel->name); 1563 int err; 1564 1565 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]); 1566 if (ev == NULL) 1567 return -ENOMEM; 1568 1569 strlcpy(ev->data, evsel->name, len + 1); 1570 err = process(tool, (union perf_event *)ev, NULL, NULL); 1571 free(ev); 1572 return err; 1573 } 1574 1575 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel, 1576 perf_event__handler_t process) 1577 { 1578 size_t size = sizeof(struct perf_record_event_update); 1579 struct perf_record_event_update *ev; 1580 int max, err; 1581 u16 type; 1582 1583 if (!evsel->core.own_cpus) 1584 return 0; 1585 1586 ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max); 1587 if (!ev) 1588 return -ENOMEM; 1589 1590 ev->header.type = PERF_RECORD_EVENT_UPDATE; 1591 ev->header.size = (u16)size; 1592 ev->type = PERF_EVENT_UPDATE__CPUS; 1593 ev->id = evsel->core.id[0]; 1594 1595 cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data, 1596 evsel->core.own_cpus, type, max); 1597 1598 err = process(tool, (union perf_event *)ev, NULL, NULL); 1599 free(ev); 1600 return err; 1601 } 1602 1603 int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist, 1604 perf_event__handler_t process) 1605 { 1606 struct evsel *evsel; 1607 int err = 0; 1608 1609 evlist__for_each_entry(evlist, evsel) { 1610 err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids, 1611 evsel->core.id, process); 1612 if (err) { 1613 pr_debug("failed to create perf header attribute\n"); 1614 return err; 1615 } 1616 } 1617 1618 return err; 1619 } 1620 1621 static bool has_unit(struct evsel *evsel) 1622 { 1623 return evsel->unit && *evsel->unit; 1624 } 1625 1626 static bool has_scale(struct evsel *evsel) 1627 { 1628 return evsel->scale != 1; 1629 } 1630 1631 int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list, 1632 perf_event__handler_t process, bool is_pipe) 1633 { 1634 struct evsel *evsel; 1635 int err; 1636 1637 /* 1638 * Synthesize other events stuff not carried within 1639 * attr event - unit, scale, name 1640 */ 1641 evlist__for_each_entry(evsel_list, evsel) { 1642 if (!evsel->supported) 1643 continue; 1644 1645 /* 1646 * Synthesize unit and scale only if it's defined. 1647 */ 1648 if (has_unit(evsel)) { 1649 err = perf_event__synthesize_event_update_unit(tool, evsel, process); 1650 if (err < 0) { 1651 pr_err("Couldn't synthesize evsel unit.\n"); 1652 return err; 1653 } 1654 } 1655 1656 if (has_scale(evsel)) { 1657 err = perf_event__synthesize_event_update_scale(tool, evsel, process); 1658 if (err < 0) { 1659 pr_err("Couldn't synthesize evsel evsel.\n"); 1660 return err; 1661 } 1662 } 1663 1664 if (evsel->core.own_cpus) { 1665 err = perf_event__synthesize_event_update_cpus(tool, evsel, process); 1666 if (err < 0) { 1667 pr_err("Couldn't synthesize evsel cpus.\n"); 1668 return err; 1669 } 1670 } 1671 1672 /* 1673 * Name is needed only for pipe output, 1674 * perf.data carries event names. 1675 */ 1676 if (is_pipe) { 1677 err = perf_event__synthesize_event_update_name(tool, evsel, process); 1678 if (err < 0) { 1679 pr_err("Couldn't synthesize evsel name.\n"); 1680 return err; 1681 } 1682 } 1683 } 1684 return 0; 1685 } 1686 1687 int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, 1688 u32 ids, u64 *id, perf_event__handler_t process) 1689 { 1690 union perf_event *ev; 1691 size_t size; 1692 int err; 1693 1694 size = sizeof(struct perf_event_attr); 1695 size = PERF_ALIGN(size, sizeof(u64)); 1696 size += sizeof(struct perf_event_header); 1697 size += ids * sizeof(u64); 1698 1699 ev = zalloc(size); 1700 1701 if (ev == NULL) 1702 return -ENOMEM; 1703 1704 ev->attr.attr = *attr; 1705 memcpy(ev->attr.id, id, ids * sizeof(u64)); 1706 1707 ev->attr.header.type = PERF_RECORD_HEADER_ATTR; 1708 ev->attr.header.size = (u16)size; 1709 1710 if (ev->attr.header.size == size) 1711 err = process(tool, ev, NULL, NULL); 1712 else 1713 err = -E2BIG; 1714 1715 free(ev); 1716 1717 return err; 1718 } 1719 1720 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist, 1721 perf_event__handler_t process) 1722 { 1723 union perf_event ev; 1724 struct tracing_data *tdata; 1725 ssize_t size = 0, aligned_size = 0, padding; 1726 struct feat_fd ff; 1727 1728 /* 1729 * We are going to store the size of the data followed 1730 * by the data contents. Since the fd descriptor is a pipe, 1731 * we cannot seek back to store the size of the data once 1732 * we know it. Instead we: 1733 * 1734 * - write the tracing data to the temp file 1735 * - get/write the data size to pipe 1736 * - write the tracing data from the temp file 1737 * to the pipe 1738 */ 1739 tdata = tracing_data_get(&evlist->core.entries, fd, true); 1740 if (!tdata) 1741 return -1; 1742 1743 memset(&ev, 0, sizeof(ev)); 1744 1745 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; 1746 size = tdata->size; 1747 aligned_size = PERF_ALIGN(size, sizeof(u64)); 1748 padding = aligned_size - size; 1749 ev.tracing_data.header.size = sizeof(ev.tracing_data); 1750 ev.tracing_data.size = aligned_size; 1751 1752 process(tool, &ev, NULL, NULL); 1753 1754 /* 1755 * The put function will copy all the tracing data 1756 * stored in temp file to the pipe. 1757 */ 1758 tracing_data_put(tdata); 1759 1760 ff = (struct feat_fd){ .fd = fd }; 1761 if (write_padded(&ff, NULL, 0, padding)) 1762 return -1; 1763 1764 return aligned_size; 1765 } 1766 1767 int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, 1768 perf_event__handler_t process, struct machine *machine) 1769 { 1770 union perf_event ev; 1771 size_t len; 1772 1773 if (!pos->hit) 1774 return 0; 1775 1776 memset(&ev, 0, sizeof(ev)); 1777 1778 len = pos->long_name_len + 1; 1779 len = PERF_ALIGN(len, NAME_ALIGN); 1780 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id)); 1781 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID; 1782 ev.build_id.header.misc = misc; 1783 ev.build_id.pid = machine->pid; 1784 ev.build_id.header.size = sizeof(ev.build_id) + len; 1785 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len); 1786 1787 return process(tool, &ev, NULL, machine); 1788 } 1789 1790 int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool, 1791 struct evlist *evlist, perf_event__handler_t process, bool attrs) 1792 { 1793 int err; 1794 1795 if (attrs) { 1796 err = perf_event__synthesize_attrs(tool, evlist, process); 1797 if (err < 0) { 1798 pr_err("Couldn't synthesize attrs.\n"); 1799 return err; 1800 } 1801 } 1802 1803 err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs); 1804 err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL); 1805 if (err < 0) { 1806 pr_err("Couldn't synthesize thread map.\n"); 1807 return err; 1808 } 1809 1810 err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL); 1811 if (err < 0) { 1812 pr_err("Couldn't synthesize thread map.\n"); 1813 return err; 1814 } 1815 1816 err = perf_event__synthesize_stat_config(tool, config, process, NULL); 1817 if (err < 0) { 1818 pr_err("Couldn't synthesize config.\n"); 1819 return err; 1820 } 1821 1822 return 0; 1823 } 1824 1825 int __weak perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, 1826 struct perf_tool *tool __maybe_unused, 1827 perf_event__handler_t process __maybe_unused, 1828 struct machine *machine __maybe_unused) 1829 { 1830 return 0; 1831 } 1832 1833 extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE]; 1834 1835 int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session, 1836 struct evlist *evlist, perf_event__handler_t process) 1837 { 1838 struct perf_header *header = &session->header; 1839 struct perf_record_header_feature *fe; 1840 struct feat_fd ff; 1841 size_t sz, sz_hdr; 1842 int feat, ret; 1843 1844 sz_hdr = sizeof(fe->header); 1845 sz = sizeof(union perf_event); 1846 /* get a nice alignment */ 1847 sz = PERF_ALIGN(sz, page_size); 1848 1849 memset(&ff, 0, sizeof(ff)); 1850 1851 ff.buf = malloc(sz); 1852 if (!ff.buf) 1853 return -ENOMEM; 1854 1855 ff.size = sz - sz_hdr; 1856 ff.ph = &session->header; 1857 1858 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { 1859 if (!feat_ops[feat].synthesize) { 1860 pr_debug("No record header feature for header :%d\n", feat); 1861 continue; 1862 } 1863 1864 ff.offset = sizeof(*fe); 1865 1866 ret = feat_ops[feat].write(&ff, evlist); 1867 if (ret || ff.offset <= (ssize_t)sizeof(*fe)) { 1868 pr_debug("Error writing feature\n"); 1869 continue; 1870 } 1871 /* ff.buf may have changed due to realloc in do_write() */ 1872 fe = ff.buf; 1873 memset(fe, 0, sizeof(*fe)); 1874 1875 fe->feat_id = feat; 1876 fe->header.type = PERF_RECORD_HEADER_FEATURE; 1877 fe->header.size = ff.offset; 1878 1879 ret = process(tool, ff.buf, NULL, NULL); 1880 if (ret) { 1881 free(ff.buf); 1882 return ret; 1883 } 1884 } 1885 1886 /* Send HEADER_LAST_FEATURE mark. */ 1887 fe = ff.buf; 1888 fe->feat_id = HEADER_LAST_FEATURE; 1889 fe->header.type = PERF_RECORD_HEADER_FEATURE; 1890 fe->header.size = sizeof(*fe); 1891 1892 ret = process(tool, ff.buf, NULL, NULL); 1893 1894 free(ff.buf); 1895 return ret; 1896 } 1897