event.c revision 4eb881eab369a68754cb352bd8c73cd363757d28
1/* ANDROID_CHANGE_BEGIN */ 2#ifdef __APPLE__ 3#include "include/linux/types.h" 4#else 5#include <features.h> // Suppress kernel-name space pollution in <linux/types.h> below 6#include <linux/types.h> 7#endif 8/* ANDROID_CHANGE_END */ 9#include "event.h" 10#include "debug.h" 11#include "session.h" 12#include "sort.h" 13#include "string.h" 14#include "strlist.h" 15#include "thread.h" 16#include "thread_map.h" 17 18static const char *perf_event__names[] = { 19 [0] = "TOTAL", 20 [PERF_RECORD_MMAP] = "MMAP", 21 [PERF_RECORD_LOST] = "LOST", 22 [PERF_RECORD_COMM] = "COMM", 23 [PERF_RECORD_EXIT] = "EXIT", 24 [PERF_RECORD_THROTTLE] = "THROTTLE", 25 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 26 [PERF_RECORD_FORK] = "FORK", 27 [PERF_RECORD_READ] = "READ", 28 [PERF_RECORD_SAMPLE] = "SAMPLE", 29 [PERF_RECORD_HEADER_ATTR] = "ATTR", 30 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 31 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 32 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 33 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 34}; 35 36const char *perf_event__name(unsigned int id) 37{ 38 if (id >= ARRAY_SIZE(perf_event__names)) 39 return "INVALID"; 40 if (!perf_event__names[id]) 41 return "UNKNOWN"; 42 return perf_event__names[id]; 43} 44 45static struct perf_sample synth_sample = { 46 .pid = -1, 47 .tid = -1, 48 .time = -1, 49 .stream_id = -1, 50 .cpu = -1, 51 .period = 1, 52}; 53 54static pid_t perf_event__synthesize_comm(union perf_event *event, pid_t pid, 55 int full, perf_event__handler_t process, 56 struct perf_session *session) 57{ 58 char filename[PATH_MAX]; 59 char bf[BUFSIZ]; 60 FILE *fp; 61 size_t size = 0; 62 DIR *tasks; 63 struct dirent dirent, *next; 64 pid_t tgid = 0; 65 66 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 67 68 fp = fopen(filename, "r"); 69 if (fp == NULL) { 70out_race: 71 /* 72 * We raced with a task exiting - just return: 73 */ 74 pr_debug("couldn't open %s\n", filename); 75 return 0; 76 } 77 78 memset(&event->comm, 0, sizeof(event->comm)); 79 80 while (!event->comm.comm[0] || !event->comm.pid) { 81 if (fgets(bf, sizeof(bf), fp) == NULL) { 82 pr_warning("couldn't get COMM and pgid, malformed %s\n", filename); 83 goto out; 84 } 85 86 if (memcmp(bf, "Name:", 5) == 0) { 87 char *name = bf + 5; 88 while (*name && isspace(*name)) 89 ++name; 90 size = strlen(name) - 1; 91 memcpy(event->comm.comm, name, size++); 92 } else if (memcmp(bf, "Tgid:", 5) == 0) { 93 char *tgids = bf + 5; 94 while (*tgids && isspace(*tgids)) 95 ++tgids; 96 tgid = event->comm.pid = atoi(tgids); 97 } 98 } 99 100 event->comm.header.type = PERF_RECORD_COMM; 101 /* ANDROID_CHANGE_BEGIN */ 102#if defined(__BIONIC__) || defined(__APPLE__) 103 size = KERNEL_ALIGN(size, sizeof(u64)); 104#else 105 size = ALIGN(size, sizeof(u64)); 106#endif 107 /* ANDROID_CHANGE_END */ 108 memset(event->comm.comm + size, 0, session->id_hdr_size); 109 event->comm.header.size = (sizeof(event->comm) - 110 (sizeof(event->comm.comm) - size) + 111 session->id_hdr_size); 112 if (!full) { 113 event->comm.tid = pid; 114 115 process(event, &synth_sample, session); 116 goto out; 117 } 118 119 snprintf(filename, sizeof(filename), "/proc/%d/task", pid); 120 121 tasks = opendir(filename); 122 if (tasks == NULL) 123 goto out_race; 124 125 while (!readdir_r(tasks, &dirent, &next) && next) { 126 char *end; 127 pid = strtol(dirent.d_name, &end, 10); 128 if (*end) 129 continue; 130 131 event->comm.tid = pid; 132 133 process(event, &synth_sample, session); 134 } 135 136 closedir(tasks); 137out: 138 fclose(fp); 139 140 return tgid; 141} 142 143static int perf_event__synthesize_mmap_events(union perf_event *event, 144 pid_t pid, pid_t tgid, 145 perf_event__handler_t process, 146 struct perf_session *session) 147{ 148 char filename[PATH_MAX]; 149 FILE *fp; 150 151 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); 152 153 fp = fopen(filename, "r"); 154 if (fp == NULL) { 155 /* 156 * We raced with a task exiting - just return: 157 */ 158 pr_debug("couldn't open %s\n", filename); 159 return -1; 160 } 161 162 event->header.type = PERF_RECORD_MMAP; 163 /* 164 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 165 */ 166 event->header.misc = PERF_RECORD_MISC_USER; 167 168 while (1) { 169 char bf[BUFSIZ], *pbf = bf; 170 int n; 171 size_t size; 172 if (fgets(bf, sizeof(bf), fp) == NULL) 173 break; 174 175 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 176 n = hex2u64(pbf, &event->mmap.start); 177 if (n < 0) 178 continue; 179 pbf += n + 1; 180 n = hex2u64(pbf, &event->mmap.len); 181 if (n < 0) 182 continue; 183 pbf += n + 3; 184 if (*pbf == 'x') { /* vm_exec */ 185 char *execname = strchr(bf, '/'); 186 187 /* Catch VDSO */ 188 if (execname == NULL) 189 execname = strstr(bf, "[vdso]"); 190 191 if (execname == NULL) 192 continue; 193 194 pbf += 3; 195 n = hex2u64(pbf, &event->mmap.pgoff); 196 197 size = strlen(execname); 198 execname[size - 1] = '\0'; /* Remove \n */ 199 memcpy(event->mmap.filename, execname, size); 200 /* ANDROID_CHANGE_BEGIN */ 201#if defined(__BIONIC__) || defined(__APPLE__) 202 size = KERNEL_ALIGN(size, sizeof(u64)); 203#else 204 size = ALIGN(size, sizeof(u64)); 205#endif 206 /* ANDROID_CHANGE_END */ 207 event->mmap.len -= event->mmap.start; 208 event->mmap.header.size = (sizeof(event->mmap) - 209 (sizeof(event->mmap.filename) - size)); 210 memset(event->mmap.filename + size, 0, session->id_hdr_size); 211 event->mmap.header.size += session->id_hdr_size; 212 event->mmap.pid = tgid; 213 event->mmap.tid = pid; 214 215 process(event, &synth_sample, session); 216 } 217 } 218 219 fclose(fp); 220 return 0; 221} 222 223int perf_event__synthesize_modules(perf_event__handler_t process, 224 struct perf_session *session, 225 struct machine *machine) 226{ 227 struct rb_node *nd; 228 struct map_groups *kmaps = &machine->kmaps; 229 union perf_event *event = zalloc((sizeof(event->mmap) + 230 session->id_hdr_size)); 231 if (event == NULL) { 232 pr_debug("Not enough memory synthesizing mmap event " 233 "for kernel modules\n"); 234 return -1; 235 } 236 237 event->header.type = PERF_RECORD_MMAP; 238 239 /* 240 * kernel uses 0 for user space maps, see kernel/perf_event.c 241 * __perf_event_mmap 242 */ 243 if (machine__is_host(machine)) 244 event->header.misc = PERF_RECORD_MISC_KERNEL; 245 else 246 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 247 248 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]); 249 nd; nd = rb_next(nd)) { 250 size_t size; 251 struct map *pos = rb_entry(nd, struct map, rb_node); 252 253 if (pos->dso->kernel) 254 continue; 255 256 /* ANDROID_CHANGE_BEGIN */ 257#if defined(__BIONIC__) || defined(__APPLE__) 258 size = KERNEL_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 259#else 260 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 261#endif 262 /* ANDROID_CHANGE_END */ 263 event->mmap.header.type = PERF_RECORD_MMAP; 264 event->mmap.header.size = (sizeof(event->mmap) - 265 (sizeof(event->mmap.filename) - size)); 266 memset(event->mmap.filename + size, 0, session->id_hdr_size); 267 event->mmap.header.size += session->id_hdr_size; 268 event->mmap.start = pos->start; 269 event->mmap.len = pos->end - pos->start; 270 event->mmap.pid = machine->pid; 271 272 memcpy(event->mmap.filename, pos->dso->long_name, 273 pos->dso->long_name_len + 1); 274 process(event, &synth_sample, session); 275 } 276 277 free(event); 278 return 0; 279} 280 281static int __event__synthesize_thread(union perf_event *comm_event, 282 union perf_event *mmap_event, 283 pid_t pid, perf_event__handler_t process, 284 struct perf_session *session) 285{ 286 pid_t tgid = perf_event__synthesize_comm(comm_event, pid, 1, process, 287 session); 288 if (tgid == -1) 289 return -1; 290 return perf_event__synthesize_mmap_events(mmap_event, pid, tgid, 291 process, session); 292} 293 294int perf_event__synthesize_thread_map(struct thread_map *threads, 295 perf_event__handler_t process, 296 struct perf_session *session) 297{ 298 union perf_event *comm_event, *mmap_event; 299 int err = -1, thread; 300 301 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size); 302 if (comm_event == NULL) 303 goto out; 304 305 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size); 306 if (mmap_event == NULL) 307 goto out_free_comm; 308 309 err = 0; 310 for (thread = 0; thread < threads->nr; ++thread) { 311 if (__event__synthesize_thread(comm_event, mmap_event, 312 threads->map[thread], 313 process, session)) { 314 err = -1; 315 break; 316 } 317 } 318 free(mmap_event); 319out_free_comm: 320 free(comm_event); 321out: 322 return err; 323} 324 325int perf_event__synthesize_threads(perf_event__handler_t process, 326 struct perf_session *session) 327{ 328 DIR *proc; 329 struct dirent dirent, *next; 330 union perf_event *comm_event, *mmap_event; 331 int err = -1; 332 333 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size); 334 if (comm_event == NULL) 335 goto out; 336 337 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size); 338 if (mmap_event == NULL) 339 goto out_free_comm; 340 341 proc = opendir("/proc"); 342 if (proc == NULL) 343 goto out_free_mmap; 344 345 while (!readdir_r(proc, &dirent, &next) && next) { 346 char *end; 347 pid_t pid = strtol(dirent.d_name, &end, 10); 348 349 if (*end) /* only interested in proper numerical dirents */ 350 continue; 351 352 __event__synthesize_thread(comm_event, mmap_event, pid, 353 process, session); 354 } 355 356 closedir(proc); 357 err = 0; 358out_free_mmap: 359 free(mmap_event); 360out_free_comm: 361 free(comm_event); 362out: 363 return err; 364} 365 366struct process_symbol_args { 367 const char *name; 368 u64 start; 369}; 370 371static int find_symbol_cb(void *arg, const char *name, char type, 372 u64 start, u64 end __used) 373{ 374 struct process_symbol_args *args = arg; 375 376 /* 377 * Must be a function or at least an alias, as in PARISC64, where "_text" is 378 * an 'A' to the same address as "_stext". 379 */ 380 if (!(symbol_type__is_a(type, MAP__FUNCTION) || 381 type == 'A') || strcmp(name, args->name)) 382 return 0; 383 384 args->start = start; 385 return 1; 386} 387 388int perf_event__synthesize_kernel_mmap(perf_event__handler_t process, 389 struct perf_session *session, 390 struct machine *machine, 391 const char *symbol_name) 392{ 393 size_t size; 394 const char *filename, *mmap_name; 395 char path[PATH_MAX]; 396 char name_buff[PATH_MAX]; 397 struct map *map; 398 int err; 399 /* 400 * We should get this from /sys/kernel/sections/.text, but till that is 401 * available use this, and after it is use this as a fallback for older 402 * kernels. 403 */ 404 struct process_symbol_args args = { .name = symbol_name, }; 405 union perf_event *event = zalloc((sizeof(event->mmap) + 406 session->id_hdr_size)); 407 if (event == NULL) { 408 pr_debug("Not enough memory synthesizing mmap event " 409 "for kernel modules\n"); 410 return -1; 411 } 412 413 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); 414 if (machine__is_host(machine)) { 415 /* 416 * kernel uses PERF_RECORD_MISC_USER for user space maps, 417 * see kernel/perf_event.c __perf_event_mmap 418 */ 419 event->header.misc = PERF_RECORD_MISC_KERNEL; 420 filename = "/proc/kallsyms"; 421 } else { 422 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 423 if (machine__is_default_guest(machine)) 424 filename = (char *) symbol_conf.default_guest_kallsyms; 425 else { 426 sprintf(path, "%s/proc/kallsyms", machine->root_dir); 427 filename = path; 428 } 429 } 430 431 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) 432 return -ENOENT; 433 434 map = machine->vmlinux_maps[MAP__FUNCTION]; 435 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 436 "%s%s", mmap_name, symbol_name) + 1; 437 /* ANDROID_CHANGE_BEGIN */ 438#if defined(__BIONIC__) || defined(__APPLE__) 439 size = KERNEL_ALIGN(size, sizeof(u64)); 440#else 441 size = ALIGN(size, sizeof(u64)); 442#endif 443 /* ANDROID_CHANGE_END */ 444 event->mmap.header.type = PERF_RECORD_MMAP; 445 event->mmap.header.size = (sizeof(event->mmap) - 446 (sizeof(event->mmap.filename) - size) + session->id_hdr_size); 447 event->mmap.pgoff = args.start; 448 event->mmap.start = map->start; 449 event->mmap.len = map->end - event->mmap.start; 450 event->mmap.pid = machine->pid; 451 452 err = process(event, &synth_sample, session); 453 free(event); 454 455 return err; 456} 457 458int perf_event__process_comm(union perf_event *event, 459 struct perf_sample *sample __used, 460 struct perf_session *session) 461{ 462 struct thread *thread = perf_session__findnew(session, event->comm.tid); 463 464 dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid); 465 466 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) { 467 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); 468 return -1; 469 } 470 471 return 0; 472} 473 474int perf_event__process_lost(union perf_event *event, 475 struct perf_sample *sample __used, 476 struct perf_session *session) 477{ 478 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", 479 event->lost.id, event->lost.lost); 480 session->hists.stats.total_lost += event->lost.lost; 481 return 0; 482} 483 484static void perf_event__set_kernel_mmap_len(union perf_event *event, 485 struct map **maps) 486{ 487 maps[MAP__FUNCTION]->start = event->mmap.start; 488 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len; 489 /* 490 * Be a bit paranoid here, some perf.data file came with 491 * a zero sized synthesized MMAP event for the kernel. 492 */ 493 if (maps[MAP__FUNCTION]->end == 0) 494 maps[MAP__FUNCTION]->end = ~0ULL; 495} 496 497static int perf_event__process_kernel_mmap(union perf_event *event, 498 struct perf_session *session) 499{ 500 struct map *map; 501 char kmmap_prefix[PATH_MAX]; 502 struct machine *machine; 503 enum dso_kernel_type kernel_type; 504 bool is_kernel_mmap; 505 506 machine = perf_session__findnew_machine(session, event->mmap.pid); 507 if (!machine) { 508 pr_err("Can't find id %d's machine\n", event->mmap.pid); 509 goto out_problem; 510 } 511 512 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); 513 if (machine__is_host(machine)) 514 kernel_type = DSO_TYPE_KERNEL; 515 else 516 kernel_type = DSO_TYPE_GUEST_KERNEL; 517 518 is_kernel_mmap = memcmp(event->mmap.filename, 519 kmmap_prefix, 520 strlen(kmmap_prefix)) == 0; 521 if (event->mmap.filename[0] == '/' || 522 (!is_kernel_mmap && event->mmap.filename[0] == '[')) { 523 524 char short_module_name[1024]; 525 char *name, *dot; 526 527 if (event->mmap.filename[0] == '/') { 528 name = strrchr(event->mmap.filename, '/'); 529 if (name == NULL) 530 goto out_problem; 531 532 ++name; /* skip / */ 533 dot = strrchr(name, '.'); 534 if (dot == NULL) 535 goto out_problem; 536 snprintf(short_module_name, sizeof(short_module_name), 537 "[%.*s]", (int)(dot - name), name); 538 strxfrchar(short_module_name, '-', '_'); 539 } else 540 strcpy(short_module_name, event->mmap.filename); 541 542 map = machine__new_module(machine, event->mmap.start, 543 event->mmap.filename); 544 if (map == NULL) 545 goto out_problem; 546 547 name = strdup(short_module_name); 548 if (name == NULL) 549 goto out_problem; 550 551 map->dso->short_name = name; 552 map->dso->sname_alloc = 1; 553 map->end = map->start + event->mmap.len; 554 } else if (is_kernel_mmap) { 555 const char *symbol_name = (event->mmap.filename + 556 strlen(kmmap_prefix)); 557 /* 558 * Should be there already, from the build-id table in 559 * the header. 560 */ 561 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, 562 kmmap_prefix); 563 if (kernel == NULL) 564 goto out_problem; 565 566 kernel->kernel = kernel_type; 567 if (__machine__create_kernel_maps(machine, kernel) < 0) 568 goto out_problem; 569 570 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps); 571 572 /* 573 * Avoid using a zero address (kptr_restrict) for the ref reloc 574 * symbol. Effectively having zero here means that at record 575 * time /proc/sys/kernel/kptr_restrict was non zero. 576 */ 577 if (event->mmap.pgoff != 0) { 578 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, 579 symbol_name, 580 event->mmap.pgoff); 581 } 582 583 if (machine__is_default_guest(machine)) { 584 /* 585 * preload dso of guest kernel and modules 586 */ 587 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], 588 NULL); 589 } 590 } 591 return 0; 592out_problem: 593 return -1; 594} 595 596int perf_event__process_mmap(union perf_event *event, 597 struct perf_sample *sample __used, 598 struct perf_session *session) 599{ 600 struct machine *machine; 601 struct thread *thread; 602 struct map *map; 603 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 604 int ret = 0; 605 606 dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n", 607 event->mmap.pid, event->mmap.tid, event->mmap.start, 608 event->mmap.len, event->mmap.pgoff, event->mmap.filename); 609 610 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || 611 cpumode == PERF_RECORD_MISC_KERNEL) { 612 ret = perf_event__process_kernel_mmap(event, session); 613 if (ret < 0) 614 goto out_problem; 615 return 0; 616 } 617 618 machine = perf_session__find_host_machine(session); 619 if (machine == NULL) 620 goto out_problem; 621 thread = perf_session__findnew(session, event->mmap.pid); 622 if (thread == NULL) 623 goto out_problem; 624 map = map__new(&machine->user_dsos, event->mmap.start, 625 event->mmap.len, event->mmap.pgoff, 626 event->mmap.pid, event->mmap.filename, 627 MAP__FUNCTION); 628 if (map == NULL) 629 goto out_problem; 630 631 thread__insert_map(thread, map); 632 return 0; 633 634out_problem: 635 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); 636 return 0; 637} 638 639int perf_event__process_task(union perf_event *event, 640 struct perf_sample *sample __used, 641 struct perf_session *session) 642{ 643 struct thread *thread = perf_session__findnew(session, event->fork.tid); 644 struct thread *parent = perf_session__findnew(session, event->fork.ptid); 645 646 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, 647 event->fork.ppid, event->fork.ptid); 648 649 if (event->header.type == PERF_RECORD_EXIT) { 650 perf_session__remove_thread(session, thread); 651 return 0; 652 } 653 654 if (thread == NULL || parent == NULL || 655 thread__fork(thread, parent) < 0) { 656 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); 657 return -1; 658 } 659 660 return 0; 661} 662 663int perf_event__process(union perf_event *event, struct perf_sample *sample, 664 struct perf_session *session) 665{ 666 switch (event->header.type) { 667 case PERF_RECORD_COMM: 668 perf_event__process_comm(event, sample, session); 669 break; 670 case PERF_RECORD_MMAP: 671 perf_event__process_mmap(event, sample, session); 672 break; 673 case PERF_RECORD_FORK: 674 case PERF_RECORD_EXIT: 675 perf_event__process_task(event, sample, session); 676 break; 677 case PERF_RECORD_LOST: 678 perf_event__process_lost(event, sample, session); 679 default: 680 break; 681 } 682 683 return 0; 684} 685 686void thread__find_addr_map(struct thread *self, 687 struct perf_session *session, u8 cpumode, 688 enum map_type type, pid_t pid, u64 addr, 689 struct addr_location *al) 690{ 691 struct map_groups *mg = &self->mg; 692 struct machine *machine = NULL; 693 694 al->thread = self; 695 al->addr = addr; 696 al->cpumode = cpumode; 697 al->filtered = false; 698 699 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 700 al->level = 'k'; 701 machine = perf_session__find_host_machine(session); 702 if (machine == NULL) { 703 al->map = NULL; 704 return; 705 } 706 mg = &machine->kmaps; 707 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 708 al->level = '.'; 709 machine = perf_session__find_host_machine(session); 710 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 711 al->level = 'g'; 712 machine = perf_session__find_machine(session, pid); 713 if (machine == NULL) { 714 al->map = NULL; 715 return; 716 } 717 mg = &machine->kmaps; 718 } else { 719 /* 720 * 'u' means guest os user space. 721 * TODO: We don't support guest user space. Might support late. 722 */ 723 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) 724 al->level = 'u'; 725 else 726 al->level = 'H'; 727 al->map = NULL; 728 729 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 730 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 731 !perf_guest) 732 al->filtered = true; 733 if ((cpumode == PERF_RECORD_MISC_USER || 734 cpumode == PERF_RECORD_MISC_KERNEL) && 735 !perf_host) 736 al->filtered = true; 737 738 return; 739 } 740try_again: 741 al->map = map_groups__find(mg, type, al->addr); 742 if (al->map == NULL) { 743 /* 744 * If this is outside of all known maps, and is a negative 745 * address, try to look it up in the kernel dso, as it might be 746 * a vsyscall or vdso (which executes in user-mode). 747 * 748 * XXX This is nasty, we should have a symbol list in the 749 * "[vdso]" dso, but for now lets use the old trick of looking 750 * in the whole kernel symbol list. 751 */ 752 if ((long long)al->addr < 0 && 753 cpumode == PERF_RECORD_MISC_USER && 754 machine && mg != &machine->kmaps) { 755 mg = &machine->kmaps; 756 goto try_again; 757 } 758 } else 759 al->addr = al->map->map_ip(al->map, al->addr); 760} 761 762void thread__find_addr_location(struct thread *self, 763 struct perf_session *session, u8 cpumode, 764 enum map_type type, pid_t pid, u64 addr, 765 struct addr_location *al, 766 symbol_filter_t filter) 767{ 768 thread__find_addr_map(self, session, cpumode, type, pid, addr, al); 769 if (al->map != NULL) 770 al->sym = map__find_symbol(al->map, al->addr, filter); 771 else 772 al->sym = NULL; 773} 774 775int perf_event__preprocess_sample(const union perf_event *event, 776 struct perf_session *session, 777 struct addr_location *al, 778 struct perf_sample *sample, 779 symbol_filter_t filter) 780{ 781 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 782 struct thread *thread = perf_session__findnew(session, event->ip.pid); 783 784 if (thread == NULL) 785 return -1; 786 787 if (symbol_conf.comm_list && 788 !strlist__has_entry(symbol_conf.comm_list, thread->comm)) 789 goto out_filtered; 790 791 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid); 792 /* 793 * Have we already created the kernel maps for the host machine? 794 * 795 * This should have happened earlier, when we processed the kernel MMAP 796 * events, but for older perf.data files there was no such thing, so do 797 * it now. 798 */ 799 if (cpumode == PERF_RECORD_MISC_KERNEL && 800 session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL) 801 machine__create_kernel_maps(&session->host_machine); 802 803 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, 804 event->ip.pid, event->ip.ip, al); 805 dump_printf(" ...... dso: %s\n", 806 al->map ? al->map->dso->long_name : 807 al->level == 'H' ? "[hypervisor]" : "<not found>"); 808 al->sym = NULL; 809 al->cpu = sample->cpu; 810 811 if (al->map) { 812 if (symbol_conf.dso_list && 813 (!al->map || !al->map->dso || 814 !(strlist__has_entry(symbol_conf.dso_list, 815 al->map->dso->short_name) || 816 (al->map->dso->short_name != al->map->dso->long_name && 817 strlist__has_entry(symbol_conf.dso_list, 818 al->map->dso->long_name))))) 819 goto out_filtered; 820 821 al->sym = map__find_symbol(al->map, al->addr, filter); 822 } 823 824 if (symbol_conf.sym_list && al->sym && 825 !strlist__has_entry(symbol_conf.sym_list, al->sym->name)) 826 goto out_filtered; 827 828 return 0; 829 830out_filtered: 831 al->filtered = true; 832 return 0; 833} 834