1 #include <linux/types.h> 2 #include "event.h" 3 #include "debug.h" 4 #include "sort.h" 5 #include "string.h" 6 #include "strlist.h" 7 #include "thread.h" 8 #include "thread_map.h" 9 10 static const char *perf_event__names[] = { 11 [0] = "TOTAL", 12 [PERF_RECORD_MMAP] = "MMAP", 13 [PERF_RECORD_LOST] = "LOST", 14 [PERF_RECORD_COMM] = "COMM", 15 [PERF_RECORD_EXIT] = "EXIT", 16 [PERF_RECORD_THROTTLE] = "THROTTLE", 17 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 18 [PERF_RECORD_FORK] = "FORK", 19 [PERF_RECORD_READ] = "READ", 20 [PERF_RECORD_SAMPLE] = "SAMPLE", 21 [PERF_RECORD_HEADER_ATTR] = "ATTR", 22 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 23 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 24 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 25 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 26 }; 27 28 const char *perf_event__name(unsigned int id) 29 { 30 if (id >= ARRAY_SIZE(perf_event__names)) 31 return "INVALID"; 32 if (!perf_event__names[id]) 33 return "UNKNOWN"; 34 return perf_event__names[id]; 35 } 36 37 static struct perf_sample synth_sample = { 38 .pid = -1, 39 .tid = -1, 40 .time = -1, 41 .stream_id = -1, 42 .cpu = -1, 43 .period = 1, 44 }; 45 46 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len) 47 { 48 char filename[PATH_MAX]; 49 char bf[BUFSIZ]; 50 FILE *fp; 51 size_t size = 0; 52 pid_t tgid = -1; 53 54 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 55 56 fp = fopen(filename, "r"); 57 if (fp == NULL) { 58 pr_debug("couldn't open %s\n", filename); 59 return 0; 60 } 61 62 while (!comm[0] || (tgid < 0)) { 63 if (fgets(bf, sizeof(bf), fp) == NULL) { 64 pr_warning("couldn't get COMM and pgid, malformed %s\n", 65 filename); 66 break; 67 } 68 69 if (memcmp(bf, "Name:", 5) == 0) { 70 char *name = bf + 5; 71 while (*name && isspace(*name)) 72 ++name; 73 size = strlen(name) - 1; 74 if (size >= len) 75 size = len - 1; 76 memcpy(comm, name, size); 77 comm[size] = '\0'; 78 79 } else if (memcmp(bf, "Tgid:", 5) == 0) { 80 char *tgids = bf + 5; 81 while (*tgids && isspace(*tgids)) 82 ++tgids; 83 tgid = atoi(tgids); 84 } 85 } 86 87 fclose(fp); 88 89 return tgid; 90 } 91 92 static pid_t perf_event__synthesize_comm(struct perf_tool *tool, 93 union perf_event *event, pid_t pid, 94 int full, 95 perf_event__handler_t process, 96 struct machine *machine) 97 { 98 char filename[PATH_MAX]; 99 size_t size; 100 DIR *tasks; 101 struct dirent dirent, *next; 102 pid_t tgid; 103 104 memset(&event->comm, 0, sizeof(event->comm)); 105 106 tgid = perf_event__get_comm_tgid(pid, event->comm.comm, 107 sizeof(event->comm.comm)); 108 if (tgid < 0) 109 goto out; 110 111 event->comm.pid = tgid; 112 event->comm.header.type = PERF_RECORD_COMM; 113 114 size = strlen(event->comm.comm) + 1; 115 size = PERF_ALIGN(size, sizeof(u64)); 116 memset(event->comm.comm + size, 0, machine->id_hdr_size); 117 event->comm.header.size = (sizeof(event->comm) - 118 (sizeof(event->comm.comm) - size) + 119 machine->id_hdr_size); 120 if (!full) { 121 event->comm.tid = pid; 122 123 if (process(tool, event, &synth_sample, machine) != 0) 124 return -1; 125 126 goto out; 127 } 128 129 snprintf(filename, sizeof(filename), "/proc/%d/task", pid); 130 131 tasks = opendir(filename); 132 if (tasks == NULL) { 133 pr_debug("couldn't open %s\n", filename); 134 return 0; 135 } 136 137 while (!readdir_r(tasks, &dirent, &next) && next) { 138 char *end; 139 pid = strtol(dirent.d_name, &end, 10); 140 if (*end) 141 continue; 142 143 /* already have tgid; jut want to update the comm */ 144 (void) perf_event__get_comm_tgid(pid, event->comm.comm, 145 sizeof(event->comm.comm)); 146 147 size = strlen(event->comm.comm) + 1; 148 size = PERF_ALIGN(size, sizeof(u64)); 149 memset(event->comm.comm + size, 0, machine->id_hdr_size); 150 event->comm.header.size = (sizeof(event->comm) - 151 (sizeof(event->comm.comm) - size) + 152 machine->id_hdr_size); 153 154 event->comm.tid = pid; 155 156 if (process(tool, event, &synth_sample, machine) != 0) { 157 tgid = -1; 158 break; 159 } 160 } 161 162 closedir(tasks); 163 out: 164 return tgid; 165 } 166 167 static int perf_event__synthesize_mmap_events(struct perf_tool *tool, 168 union perf_event *event, 169 pid_t pid, pid_t tgid, 170 perf_event__handler_t process, 171 struct machine *machine) 172 { 173 char filename[PATH_MAX]; 174 FILE *fp; 175 int rc = 0; 176 177 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); 178 179 fp = fopen(filename, "r"); 180 if (fp == NULL) { 181 /* 182 * We raced with a task exiting - just return: 183 */ 184 pr_debug("couldn't open %s\n", filename); 185 return -1; 186 } 187 188 event->header.type = PERF_RECORD_MMAP; 189 /* 190 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 191 */ 192 event->header.misc = PERF_RECORD_MISC_USER; 193 194 while (1) { 195 char bf[BUFSIZ], *pbf = bf; 196 int n; 197 size_t size; 198 if (fgets(bf, sizeof(bf), fp) == NULL) 199 break; 200 201 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 202 n = hex2u64(pbf, &event->mmap.start); 203 if (n < 0) 204 continue; 205 pbf += n + 1; 206 n = hex2u64(pbf, &event->mmap.len); 207 if (n < 0) 208 continue; 209 pbf += n + 3; 210 if (*pbf == 'x') { /* vm_exec */ 211 char anonstr[] = "//anon\n"; 212 char *execname = strchr(bf, '/'); 213 214 /* Catch VDSO */ 215 if (execname == NULL) 216 execname = strstr(bf, "[vdso]"); 217 218 /* Catch anonymous mmaps */ 219 if ((execname == NULL) && !strstr(bf, "[")) 220 execname = anonstr; 221 222 if (execname == NULL) 223 continue; 224 225 pbf += 3; 226 n = hex2u64(pbf, &event->mmap.pgoff); 227 228 size = strlen(execname); 229 execname[size - 1] = '\0'; /* Remove \n */ 230 memcpy(event->mmap.filename, execname, size); 231 size = PERF_ALIGN(size, sizeof(u64)); 232 event->mmap.len -= event->mmap.start; 233 event->mmap.header.size = (sizeof(event->mmap) - 234 (sizeof(event->mmap.filename) - size)); 235 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 236 event->mmap.header.size += machine->id_hdr_size; 237 event->mmap.pid = tgid; 238 event->mmap.tid = pid; 239 240 if (process(tool, event, &synth_sample, machine) != 0) { 241 rc = -1; 242 break; 243 } 244 } 245 } 246 247 fclose(fp); 248 return rc; 249 } 250 251 int perf_event__synthesize_modules(struct perf_tool *tool, 252 perf_event__handler_t process, 253 struct machine *machine) 254 { 255 int rc = 0; 256 struct rb_node *nd; 257 struct map_groups *kmaps = &machine->kmaps; 258 union perf_event *event = zalloc((sizeof(event->mmap) + 259 machine->id_hdr_size)); 260 if (event == NULL) { 261 pr_debug("Not enough memory synthesizing mmap event " 262 "for kernel modules\n"); 263 return -1; 264 } 265 266 event->header.type = PERF_RECORD_MMAP; 267 268 /* 269 * kernel uses 0 for user space maps, see kernel/perf_event.c 270 * __perf_event_mmap 271 */ 272 if (machine__is_host(machine)) 273 event->header.misc = PERF_RECORD_MISC_KERNEL; 274 else 275 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 276 277 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]); 278 nd; nd = rb_next(nd)) { 279 size_t size; 280 struct map *pos = rb_entry(nd, struct map, rb_node); 281 282 if (pos->dso->kernel) 283 continue; 284 285 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 286 event->mmap.header.type = PERF_RECORD_MMAP; 287 event->mmap.header.size = (sizeof(event->mmap) - 288 (sizeof(event->mmap.filename) - size)); 289 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 290 event->mmap.header.size += machine->id_hdr_size; 291 event->mmap.start = pos->start; 292 event->mmap.len = pos->end - pos->start; 293 event->mmap.pid = machine->pid; 294 295 memcpy(event->mmap.filename, pos->dso->long_name, 296 pos->dso->long_name_len + 1); 297 if (process(tool, event, &synth_sample, machine) != 0) { 298 rc = -1; 299 break; 300 } 301 } 302 303 free(event); 304 return rc; 305 } 306 307 static int __event__synthesize_thread(union perf_event *comm_event, 308 union perf_event *mmap_event, 309 pid_t pid, int full, 310 perf_event__handler_t process, 311 struct perf_tool *tool, 312 struct machine *machine) 313 { 314 pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full, 315 process, machine); 316 if (tgid == -1) 317 return -1; 318 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 319 process, machine); 320 } 321 322 int perf_event__synthesize_thread_map(struct perf_tool *tool, 323 struct thread_map *threads, 324 perf_event__handler_t process, 325 struct machine *machine) 326 { 327 union perf_event *comm_event, *mmap_event; 328 int err = -1, thread, j; 329 330 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 331 if (comm_event == NULL) 332 goto out; 333 334 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); 335 if (mmap_event == NULL) 336 goto out_free_comm; 337 338 err = 0; 339 for (thread = 0; thread < threads->nr; ++thread) { 340 if (__event__synthesize_thread(comm_event, mmap_event, 341 threads->map[thread], 0, 342 process, tool, machine)) { 343 err = -1; 344 break; 345 } 346 347 /* 348 * comm.pid is set to thread group id by 349 * perf_event__synthesize_comm 350 */ 351 if ((int) comm_event->comm.pid != threads->map[thread]) { 352 bool need_leader = true; 353 354 /* is thread group leader in thread_map? */ 355 for (j = 0; j < threads->nr; ++j) { 356 if ((int) comm_event->comm.pid == threads->map[j]) { 357 need_leader = false; 358 break; 359 } 360 } 361 362 /* if not, generate events for it */ 363 if (need_leader && 364 __event__synthesize_thread(comm_event, 365 mmap_event, 366 comm_event->comm.pid, 0, 367 process, tool, machine)) { 368 err = -1; 369 break; 370 } 371 } 372 } 373 free(mmap_event); 374 out_free_comm: 375 free(comm_event); 376 out: 377 return err; 378 } 379 380 int perf_event__synthesize_threads(struct perf_tool *tool, 381 perf_event__handler_t process, 382 struct machine *machine) 383 { 384 DIR *proc; 385 struct dirent dirent, *next; 386 union perf_event *comm_event, *mmap_event; 387 int err = -1; 388 389 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 390 if (comm_event == NULL) 391 goto out; 392 393 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); 394 if (mmap_event == NULL) 395 goto out_free_comm; 396 397 proc = opendir("/proc"); 398 if (proc == NULL) 399 goto out_free_mmap; 400 401 while (!readdir_r(proc, &dirent, &next) && next) { 402 char *end; 403 pid_t pid = strtol(dirent.d_name, &end, 10); 404 405 if (*end) /* only interested in proper numerical dirents */ 406 continue; 407 408 if (__event__synthesize_thread(comm_event, mmap_event, pid, 1, 409 process, tool, machine) != 0) { 410 err = -1; 411 goto out_closedir; 412 } 413 } 414 415 err = 0; 416 out_closedir: 417 closedir(proc); 418 out_free_mmap: 419 free(mmap_event); 420 out_free_comm: 421 free(comm_event); 422 out: 423 return err; 424 } 425 426 struct process_symbol_args { 427 const char *name; 428 u64 start; 429 }; 430 431 static int find_symbol_cb(void *arg, const char *name, char type, 432 u64 start) 433 { 434 struct process_symbol_args *args = arg; 435 436 /* 437 * Must be a function or at least an alias, as in PARISC64, where "_text" is 438 * an 'A' to the same address as "_stext". 439 */ 440 if (!(symbol_type__is_a(type, MAP__FUNCTION) || 441 type == 'A') || strcmp(name, args->name)) 442 return 0; 443 444 args->start = start; 445 return 1; 446 } 447 448 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 449 perf_event__handler_t process, 450 struct machine *machine, 451 const char *symbol_name) 452 { 453 size_t size; 454 const char *filename, *mmap_name; 455 char path[PATH_MAX]; 456 char name_buff[PATH_MAX]; 457 struct map *map; 458 int err; 459 /* 460 * We should get this from /sys/kernel/sections/.text, but till that is 461 * available use this, and after it is use this as a fallback for older 462 * kernels. 463 */ 464 struct process_symbol_args args = { .name = symbol_name, }; 465 union perf_event *event = zalloc((sizeof(event->mmap) + 466 machine->id_hdr_size)); 467 if (event == NULL) { 468 pr_debug("Not enough memory synthesizing mmap event " 469 "for kernel modules\n"); 470 return -1; 471 } 472 473 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); 474 if (machine__is_host(machine)) { 475 /* 476 * kernel uses PERF_RECORD_MISC_USER for user space maps, 477 * see kernel/perf_event.c __perf_event_mmap 478 */ 479 event->header.misc = PERF_RECORD_MISC_KERNEL; 480 filename = "/proc/kallsyms"; 481 } else { 482 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 483 if (machine__is_default_guest(machine)) 484 filename = (char *) symbol_conf.default_guest_kallsyms; 485 else { 486 sprintf(path, "%s/proc/kallsyms", machine->root_dir); 487 filename = path; 488 } 489 } 490 491 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) 492 return -ENOENT; 493 494 map = machine->vmlinux_maps[MAP__FUNCTION]; 495 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 496 "%s%s", mmap_name, symbol_name) + 1; 497 size = PERF_ALIGN(size, sizeof(u64)); 498 event->mmap.header.type = PERF_RECORD_MMAP; 499 event->mmap.header.size = (sizeof(event->mmap) - 500 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 501 event->mmap.pgoff = args.start; 502 event->mmap.start = map->start; 503 event->mmap.len = map->end - event->mmap.start; 504 event->mmap.pid = machine->pid; 505 506 err = process(tool, event, &synth_sample, machine); 507 free(event); 508 509 return err; 510 } 511 512 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 513 { 514 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid); 515 } 516 517 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 518 union perf_event *event, 519 struct perf_sample *sample __maybe_unused, 520 struct machine *machine) 521 { 522 struct thread *thread = machine__findnew_thread(machine, event->comm.tid); 523 524 if (dump_trace) 525 perf_event__fprintf_comm(event, stdout); 526 527 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) { 528 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); 529 return -1; 530 } 531 532 return 0; 533 } 534 535 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 536 union perf_event *event, 537 struct perf_sample *sample __maybe_unused, 538 struct machine *machine __maybe_unused) 539 { 540 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", 541 event->lost.id, event->lost.lost); 542 return 0; 543 } 544 545 static void perf_event__set_kernel_mmap_len(union perf_event *event, 546 struct map **maps) 547 { 548 maps[MAP__FUNCTION]->start = event->mmap.start; 549 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len; 550 /* 551 * Be a bit paranoid here, some perf.data file came with 552 * a zero sized synthesized MMAP event for the kernel. 553 */ 554 if (maps[MAP__FUNCTION]->end == 0) 555 maps[MAP__FUNCTION]->end = ~0ULL; 556 } 557 558 static int perf_event__process_kernel_mmap(struct perf_tool *tool 559 __maybe_unused, 560 union perf_event *event, 561 struct machine *machine) 562 { 563 struct map *map; 564 char kmmap_prefix[PATH_MAX]; 565 enum dso_kernel_type kernel_type; 566 bool is_kernel_mmap; 567 568 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); 569 if (machine__is_host(machine)) 570 kernel_type = DSO_TYPE_KERNEL; 571 else 572 kernel_type = DSO_TYPE_GUEST_KERNEL; 573 574 is_kernel_mmap = memcmp(event->mmap.filename, 575 kmmap_prefix, 576 strlen(kmmap_prefix) - 1) == 0; 577 if (event->mmap.filename[0] == '/' || 578 (!is_kernel_mmap && event->mmap.filename[0] == '[')) { 579 580 char short_module_name[1024]; 581 char *name, *dot; 582 583 if (event->mmap.filename[0] == '/') { 584 name = strrchr(event->mmap.filename, '/'); 585 if (name == NULL) 586 goto out_problem; 587 588 ++name; /* skip / */ 589 dot = strrchr(name, '.'); 590 if (dot == NULL) 591 goto out_problem; 592 snprintf(short_module_name, sizeof(short_module_name), 593 "[%.*s]", (int)(dot - name), name); 594 strxfrchar(short_module_name, '-', '_'); 595 } else 596 strcpy(short_module_name, event->mmap.filename); 597 598 map = machine__new_module(machine, event->mmap.start, 599 event->mmap.filename); 600 if (map == NULL) 601 goto out_problem; 602 603 name = strdup(short_module_name); 604 if (name == NULL) 605 goto out_problem; 606 607 map->dso->short_name = name; 608 map->dso->sname_alloc = 1; 609 map->end = map->start + event->mmap.len; 610 } else if (is_kernel_mmap) { 611 const char *symbol_name = (event->mmap.filename + 612 strlen(kmmap_prefix)); 613 /* 614 * Should be there already, from the build-id table in 615 * the header. 616 */ 617 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, 618 kmmap_prefix); 619 if (kernel == NULL) 620 goto out_problem; 621 622 kernel->kernel = kernel_type; 623 if (__machine__create_kernel_maps(machine, kernel) < 0) 624 goto out_problem; 625 626 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps); 627 628 /* 629 * Avoid using a zero address (kptr_restrict) for the ref reloc 630 * symbol. Effectively having zero here means that at record 631 * time /proc/sys/kernel/kptr_restrict was non zero. 632 */ 633 if (event->mmap.pgoff != 0) { 634 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, 635 symbol_name, 636 event->mmap.pgoff); 637 } 638 639 if (machine__is_default_guest(machine)) { 640 /* 641 * preload dso of guest kernel and modules 642 */ 643 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], 644 NULL); 645 } 646 } 647 return 0; 648 out_problem: 649 return -1; 650 } 651 652 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 653 { 654 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n", 655 event->mmap.pid, event->mmap.tid, event->mmap.start, 656 event->mmap.len, event->mmap.pgoff, event->mmap.filename); 657 } 658 659 int perf_event__process_mmap(struct perf_tool *tool, 660 union perf_event *event, 661 struct perf_sample *sample __maybe_unused, 662 struct machine *machine) 663 { 664 struct thread *thread; 665 struct map *map; 666 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 667 int ret = 0; 668 669 if (dump_trace) 670 perf_event__fprintf_mmap(event, stdout); 671 672 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || 673 cpumode == PERF_RECORD_MISC_KERNEL) { 674 ret = perf_event__process_kernel_mmap(tool, event, machine); 675 if (ret < 0) 676 goto out_problem; 677 return 0; 678 } 679 680 thread = machine__findnew_thread(machine, event->mmap.pid); 681 if (thread == NULL) 682 goto out_problem; 683 map = map__new(&machine->user_dsos, event->mmap.start, 684 event->mmap.len, event->mmap.pgoff, 685 event->mmap.pid, event->mmap.filename, 686 MAP__FUNCTION); 687 if (map == NULL) 688 goto out_problem; 689 690 thread__insert_map(thread, map); 691 return 0; 692 693 out_problem: 694 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); 695 return 0; 696 } 697 698 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 699 { 700 return fprintf(fp, "(%d:%d):(%d:%d)\n", 701 event->fork.pid, event->fork.tid, 702 event->fork.ppid, event->fork.ptid); 703 } 704 705 int perf_event__process_task(struct perf_tool *tool __maybe_unused, 706 union perf_event *event, 707 struct perf_sample *sample __maybe_unused, 708 struct machine *machine) 709 { 710 struct thread *thread = machine__findnew_thread(machine, event->fork.tid); 711 struct thread *parent = machine__findnew_thread(machine, event->fork.ptid); 712 713 if (dump_trace) 714 perf_event__fprintf_task(event, stdout); 715 716 if (event->header.type == PERF_RECORD_EXIT) { 717 machine__remove_thread(machine, thread); 718 return 0; 719 } 720 721 if (thread == NULL || parent == NULL || 722 thread__fork(thread, parent) < 0) { 723 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); 724 return -1; 725 } 726 727 return 0; 728 } 729 730 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 731 { 732 size_t ret = fprintf(fp, "PERF_RECORD_%s", 733 perf_event__name(event->header.type)); 734 735 switch (event->header.type) { 736 case PERF_RECORD_COMM: 737 ret += perf_event__fprintf_comm(event, fp); 738 break; 739 case PERF_RECORD_FORK: 740 case PERF_RECORD_EXIT: 741 ret += perf_event__fprintf_task(event, fp); 742 break; 743 case PERF_RECORD_MMAP: 744 ret += perf_event__fprintf_mmap(event, fp); 745 break; 746 default: 747 ret += fprintf(fp, "\n"); 748 } 749 750 return ret; 751 } 752 753 int perf_event__process(struct perf_tool *tool, union perf_event *event, 754 struct perf_sample *sample, struct machine *machine) 755 { 756 switch (event->header.type) { 757 case PERF_RECORD_COMM: 758 perf_event__process_comm(tool, event, sample, machine); 759 break; 760 case PERF_RECORD_MMAP: 761 perf_event__process_mmap(tool, event, sample, machine); 762 break; 763 case PERF_RECORD_FORK: 764 case PERF_RECORD_EXIT: 765 perf_event__process_task(tool, event, sample, machine); 766 break; 767 case PERF_RECORD_LOST: 768 perf_event__process_lost(tool, event, sample, machine); 769 default: 770 break; 771 } 772 773 return 0; 774 } 775 776 void thread__find_addr_map(struct thread *self, 777 struct machine *machine, u8 cpumode, 778 enum map_type type, u64 addr, 779 struct addr_location *al) 780 { 781 struct map_groups *mg = &self->mg; 782 783 al->thread = self; 784 al->addr = addr; 785 al->cpumode = cpumode; 786 al->filtered = false; 787 788 if (machine == NULL) { 789 al->map = NULL; 790 return; 791 } 792 793 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 794 al->level = 'k'; 795 mg = &machine->kmaps; 796 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 797 al->level = '.'; 798 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 799 al->level = 'g'; 800 mg = &machine->kmaps; 801 } else { 802 /* 803 * 'u' means guest os user space. 804 * TODO: We don't support guest user space. Might support late. 805 */ 806 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) 807 al->level = 'u'; 808 else 809 al->level = 'H'; 810 al->map = NULL; 811 812 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 813 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 814 !perf_guest) 815 al->filtered = true; 816 if ((cpumode == PERF_RECORD_MISC_USER || 817 cpumode == PERF_RECORD_MISC_KERNEL) && 818 !perf_host) 819 al->filtered = true; 820 821 return; 822 } 823 try_again: 824 al->map = map_groups__find(mg, type, al->addr); 825 if (al->map == NULL) { 826 /* 827 * If this is outside of all known maps, and is a negative 828 * address, try to look it up in the kernel dso, as it might be 829 * a vsyscall or vdso (which executes in user-mode). 830 * 831 * XXX This is nasty, we should have a symbol list in the 832 * "[vdso]" dso, but for now lets use the old trick of looking 833 * in the whole kernel symbol list. 834 */ 835 if ((long long)al->addr < 0 && 836 cpumode == PERF_RECORD_MISC_USER && 837 machine && mg != &machine->kmaps) { 838 mg = &machine->kmaps; 839 goto try_again; 840 } 841 } else 842 al->addr = al->map->map_ip(al->map, al->addr); 843 } 844 845 void thread__find_addr_location(struct thread *thread, struct machine *machine, 846 u8 cpumode, enum map_type type, u64 addr, 847 struct addr_location *al, 848 symbol_filter_t filter) 849 { 850 thread__find_addr_map(thread, machine, cpumode, type, addr, al); 851 if (al->map != NULL) 852 al->sym = map__find_symbol(al->map, al->addr, filter); 853 else 854 al->sym = NULL; 855 } 856 857 int perf_event__preprocess_sample(const union perf_event *event, 858 struct machine *machine, 859 struct addr_location *al, 860 struct perf_sample *sample, 861 symbol_filter_t filter) 862 { 863 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 864 struct thread *thread = machine__findnew_thread(machine, event->ip.pid); 865 866 if (thread == NULL) 867 return -1; 868 869 if (symbol_conf.comm_list && 870 !strlist__has_entry(symbol_conf.comm_list, thread->comm)) 871 goto out_filtered; 872 873 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid); 874 /* 875 * Have we already created the kernel maps for this machine? 876 * 877 * This should have happened earlier, when we processed the kernel MMAP 878 * events, but for older perf.data files there was no such thing, so do 879 * it now. 880 */ 881 if (cpumode == PERF_RECORD_MISC_KERNEL && 882 machine->vmlinux_maps[MAP__FUNCTION] == NULL) 883 machine__create_kernel_maps(machine); 884 885 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION, 886 event->ip.ip, al); 887 dump_printf(" ...... dso: %s\n", 888 al->map ? al->map->dso->long_name : 889 al->level == 'H' ? "[hypervisor]" : "<not found>"); 890 al->sym = NULL; 891 al->cpu = sample->cpu; 892 893 if (al->map) { 894 struct dso *dso = al->map->dso; 895 896 if (symbol_conf.dso_list && 897 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 898 dso->short_name) || 899 (dso->short_name != dso->long_name && 900 strlist__has_entry(symbol_conf.dso_list, 901 dso->long_name))))) 902 goto out_filtered; 903 904 al->sym = map__find_symbol(al->map, al->addr, filter); 905 } 906 907 if (symbol_conf.sym_list && 908 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 909 al->sym->name))) 910 goto out_filtered; 911 912 return 0; 913 914 out_filtered: 915 al->filtered = true; 916 return 0; 917 } 918