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