1 #include <linux/hw_breakpoint.h> 2 #include "util.h" 3 #include "../perf.h" 4 #include "evlist.h" 5 #include "evsel.h" 6 #include "parse-options.h" 7 #include "parse-events.h" 8 #include "exec_cmd.h" 9 #include "string.h" 10 #include "symbol.h" 11 #include "cache.h" 12 #include "header.h" 13 #include <lk/debugfs.h> 14 #include "parse-events-bison.h" 15 #define YY_EXTRA_TYPE int 16 #include "parse-events-flex.h" 17 #include "pmu.h" 18 19 #define MAX_NAME_LEN 100 20 21 struct event_symbol { 22 const char *symbol; 23 const char *alias; 24 }; 25 26 #ifdef PARSER_DEBUG 27 extern int parse_events_debug; 28 #endif 29 int parse_events_parse(void *data, void *scanner); 30 31 static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { 32 [PERF_COUNT_HW_CPU_CYCLES] = { 33 .symbol = "cpu-cycles", 34 .alias = "cycles", 35 }, 36 [PERF_COUNT_HW_INSTRUCTIONS] = { 37 .symbol = "instructions", 38 .alias = "", 39 }, 40 [PERF_COUNT_HW_CACHE_REFERENCES] = { 41 .symbol = "cache-references", 42 .alias = "", 43 }, 44 [PERF_COUNT_HW_CACHE_MISSES] = { 45 .symbol = "cache-misses", 46 .alias = "", 47 }, 48 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 49 .symbol = "branch-instructions", 50 .alias = "branches", 51 }, 52 [PERF_COUNT_HW_BRANCH_MISSES] = { 53 .symbol = "branch-misses", 54 .alias = "", 55 }, 56 [PERF_COUNT_HW_BUS_CYCLES] = { 57 .symbol = "bus-cycles", 58 .alias = "", 59 }, 60 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { 61 .symbol = "stalled-cycles-frontend", 62 .alias = "idle-cycles-frontend", 63 }, 64 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { 65 .symbol = "stalled-cycles-backend", 66 .alias = "idle-cycles-backend", 67 }, 68 [PERF_COUNT_HW_REF_CPU_CYCLES] = { 69 .symbol = "ref-cycles", 70 .alias = "", 71 }, 72 }; 73 74 static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { 75 [PERF_COUNT_SW_CPU_CLOCK] = { 76 .symbol = "cpu-clock", 77 .alias = "", 78 }, 79 [PERF_COUNT_SW_TASK_CLOCK] = { 80 .symbol = "task-clock", 81 .alias = "", 82 }, 83 [PERF_COUNT_SW_PAGE_FAULTS] = { 84 .symbol = "page-faults", 85 .alias = "faults", 86 }, 87 [PERF_COUNT_SW_CONTEXT_SWITCHES] = { 88 .symbol = "context-switches", 89 .alias = "cs", 90 }, 91 [PERF_COUNT_SW_CPU_MIGRATIONS] = { 92 .symbol = "cpu-migrations", 93 .alias = "migrations", 94 }, 95 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { 96 .symbol = "minor-faults", 97 .alias = "", 98 }, 99 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { 100 .symbol = "major-faults", 101 .alias = "", 102 }, 103 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { 104 .symbol = "alignment-faults", 105 .alias = "", 106 }, 107 [PERF_COUNT_SW_EMULATION_FAULTS] = { 108 .symbol = "emulation-faults", 109 .alias = "", 110 }, 111 }; 112 113 #define __PERF_EVENT_FIELD(config, name) \ 114 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT) 115 116 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW) 117 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG) 118 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE) 119 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT) 120 121 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \ 122 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \ 123 if (sys_dirent.d_type == DT_DIR && \ 124 (strcmp(sys_dirent.d_name, ".")) && \ 125 (strcmp(sys_dirent.d_name, ".."))) 126 127 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir) 128 { 129 char evt_path[MAXPATHLEN]; 130 int fd; 131 132 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path, 133 sys_dir->d_name, evt_dir->d_name); 134 fd = open(evt_path, O_RDONLY); 135 if (fd < 0) 136 return -EINVAL; 137 close(fd); 138 139 return 0; 140 } 141 142 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \ 143 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \ 144 if (evt_dirent.d_type == DT_DIR && \ 145 (strcmp(evt_dirent.d_name, ".")) && \ 146 (strcmp(evt_dirent.d_name, "..")) && \ 147 (!tp_event_has_id(&sys_dirent, &evt_dirent))) 148 149 #define MAX_EVENT_LENGTH 512 150 151 152 struct tracepoint_path *tracepoint_id_to_path(u64 config) 153 { 154 struct tracepoint_path *path = NULL; 155 DIR *sys_dir, *evt_dir; 156 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 157 char id_buf[24]; 158 int fd; 159 u64 id; 160 char evt_path[MAXPATHLEN]; 161 char dir_path[MAXPATHLEN]; 162 163 if (debugfs_valid_mountpoint(tracing_events_path)) 164 return NULL; 165 166 sys_dir = opendir(tracing_events_path); 167 if (!sys_dir) 168 return NULL; 169 170 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 171 172 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 173 sys_dirent.d_name); 174 evt_dir = opendir(dir_path); 175 if (!evt_dir) 176 continue; 177 178 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 179 180 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, 181 evt_dirent.d_name); 182 fd = open(evt_path, O_RDONLY); 183 if (fd < 0) 184 continue; 185 if (read(fd, id_buf, sizeof(id_buf)) < 0) { 186 close(fd); 187 continue; 188 } 189 close(fd); 190 id = atoll(id_buf); 191 if (id == config) { 192 closedir(evt_dir); 193 closedir(sys_dir); 194 path = zalloc(sizeof(*path)); 195 path->system = malloc(MAX_EVENT_LENGTH); 196 if (!path->system) { 197 free(path); 198 return NULL; 199 } 200 path->name = malloc(MAX_EVENT_LENGTH); 201 if (!path->name) { 202 free(path->system); 203 free(path); 204 return NULL; 205 } 206 strncpy(path->system, sys_dirent.d_name, 207 MAX_EVENT_LENGTH); 208 strncpy(path->name, evt_dirent.d_name, 209 MAX_EVENT_LENGTH); 210 return path; 211 } 212 } 213 closedir(evt_dir); 214 } 215 216 closedir(sys_dir); 217 return NULL; 218 } 219 220 const char *event_type(int type) 221 { 222 switch (type) { 223 case PERF_TYPE_HARDWARE: 224 return "hardware"; 225 226 case PERF_TYPE_SOFTWARE: 227 return "software"; 228 229 case PERF_TYPE_TRACEPOINT: 230 return "tracepoint"; 231 232 case PERF_TYPE_HW_CACHE: 233 return "hardware-cache"; 234 235 default: 236 break; 237 } 238 239 return "unknown"; 240 } 241 242 243 244 static int __add_event(struct list_head **_list, int *idx, 245 struct perf_event_attr *attr, 246 char *name, struct cpu_map *cpus) 247 { 248 struct perf_evsel *evsel; 249 struct list_head *list = *_list; 250 251 if (!list) { 252 list = malloc(sizeof(*list)); 253 if (!list) 254 return -ENOMEM; 255 INIT_LIST_HEAD(list); 256 } 257 258 event_attr_init(attr); 259 260 evsel = perf_evsel__new(attr, (*idx)++); 261 if (!evsel) { 262 free(list); 263 return -ENOMEM; 264 } 265 266 evsel->cpus = cpus; 267 if (name) 268 evsel->name = strdup(name); 269 list_add_tail(&evsel->node, list); 270 *_list = list; 271 return 0; 272 } 273 274 static int add_event(struct list_head **_list, int *idx, 275 struct perf_event_attr *attr, char *name) 276 { 277 return __add_event(_list, idx, attr, name, NULL); 278 } 279 280 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size) 281 { 282 int i, j; 283 int n, longest = -1; 284 285 for (i = 0; i < size; i++) { 286 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) { 287 n = strlen(names[i][j]); 288 if (n > longest && !strncasecmp(str, names[i][j], n)) 289 longest = n; 290 } 291 if (longest > 0) 292 return i; 293 } 294 295 return -1; 296 } 297 298 int parse_events_add_cache(struct list_head **list, int *idx, 299 char *type, char *op_result1, char *op_result2) 300 { 301 struct perf_event_attr attr; 302 char name[MAX_NAME_LEN]; 303 int cache_type = -1, cache_op = -1, cache_result = -1; 304 char *op_result[2] = { op_result1, op_result2 }; 305 int i, n; 306 307 /* 308 * No fallback - if we cannot get a clear cache type 309 * then bail out: 310 */ 311 cache_type = parse_aliases(type, perf_evsel__hw_cache, 312 PERF_COUNT_HW_CACHE_MAX); 313 if (cache_type == -1) 314 return -EINVAL; 315 316 n = snprintf(name, MAX_NAME_LEN, "%s", type); 317 318 for (i = 0; (i < 2) && (op_result[i]); i++) { 319 char *str = op_result[i]; 320 321 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); 322 323 if (cache_op == -1) { 324 cache_op = parse_aliases(str, perf_evsel__hw_cache_op, 325 PERF_COUNT_HW_CACHE_OP_MAX); 326 if (cache_op >= 0) { 327 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op)) 328 return -EINVAL; 329 continue; 330 } 331 } 332 333 if (cache_result == -1) { 334 cache_result = parse_aliases(str, perf_evsel__hw_cache_result, 335 PERF_COUNT_HW_CACHE_RESULT_MAX); 336 if (cache_result >= 0) 337 continue; 338 } 339 } 340 341 /* 342 * Fall back to reads: 343 */ 344 if (cache_op == -1) 345 cache_op = PERF_COUNT_HW_CACHE_OP_READ; 346 347 /* 348 * Fall back to accesses: 349 */ 350 if (cache_result == -1) 351 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; 352 353 memset(&attr, 0, sizeof(attr)); 354 attr.config = cache_type | (cache_op << 8) | (cache_result << 16); 355 attr.type = PERF_TYPE_HW_CACHE; 356 return add_event(list, idx, &attr, name); 357 } 358 359 static int add_tracepoint(struct list_head **listp, int *idx, 360 char *sys_name, char *evt_name) 361 { 362 struct perf_evsel *evsel; 363 struct list_head *list = *listp; 364 365 if (!list) { 366 list = malloc(sizeof(*list)); 367 if (!list) 368 return -ENOMEM; 369 INIT_LIST_HEAD(list); 370 } 371 372 evsel = perf_evsel__newtp(sys_name, evt_name, (*idx)++); 373 if (!evsel) { 374 free(list); 375 return -ENOMEM; 376 } 377 378 list_add_tail(&evsel->node, list); 379 *listp = list; 380 return 0; 381 } 382 383 static int add_tracepoint_multi_event(struct list_head **list, int *idx, 384 char *sys_name, char *evt_name) 385 { 386 char evt_path[MAXPATHLEN]; 387 struct dirent *evt_ent; 388 DIR *evt_dir; 389 int ret = 0; 390 391 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name); 392 evt_dir = opendir(evt_path); 393 if (!evt_dir) { 394 perror("Can't open event dir"); 395 return -1; 396 } 397 398 while (!ret && (evt_ent = readdir(evt_dir))) { 399 if (!strcmp(evt_ent->d_name, ".") 400 || !strcmp(evt_ent->d_name, "..") 401 || !strcmp(evt_ent->d_name, "enable") 402 || !strcmp(evt_ent->d_name, "filter")) 403 continue; 404 405 if (!strglobmatch(evt_ent->d_name, evt_name)) 406 continue; 407 408 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name); 409 } 410 411 closedir(evt_dir); 412 return ret; 413 } 414 415 static int add_tracepoint_event(struct list_head **list, int *idx, 416 char *sys_name, char *evt_name) 417 { 418 return strpbrk(evt_name, "*?") ? 419 add_tracepoint_multi_event(list, idx, sys_name, evt_name) : 420 add_tracepoint(list, idx, sys_name, evt_name); 421 } 422 423 static int add_tracepoint_multi_sys(struct list_head **list, int *idx, 424 char *sys_name, char *evt_name) 425 { 426 struct dirent *events_ent; 427 DIR *events_dir; 428 int ret = 0; 429 430 events_dir = opendir(tracing_events_path); 431 if (!events_dir) { 432 perror("Can't open event dir"); 433 return -1; 434 } 435 436 while (!ret && (events_ent = readdir(events_dir))) { 437 if (!strcmp(events_ent->d_name, ".") 438 || !strcmp(events_ent->d_name, "..") 439 || !strcmp(events_ent->d_name, "enable") 440 || !strcmp(events_ent->d_name, "header_event") 441 || !strcmp(events_ent->d_name, "header_page")) 442 continue; 443 444 if (!strglobmatch(events_ent->d_name, sys_name)) 445 continue; 446 447 ret = add_tracepoint_event(list, idx, events_ent->d_name, 448 evt_name); 449 } 450 451 closedir(events_dir); 452 return ret; 453 } 454 455 int parse_events_add_tracepoint(struct list_head **list, int *idx, 456 char *sys, char *event) 457 { 458 int ret; 459 460 ret = debugfs_valid_mountpoint(tracing_events_path); 461 if (ret) 462 return ret; 463 464 if (strpbrk(sys, "*?")) 465 return add_tracepoint_multi_sys(list, idx, sys, event); 466 else 467 return add_tracepoint_event(list, idx, sys, event); 468 } 469 470 static int 471 parse_breakpoint_type(const char *type, struct perf_event_attr *attr) 472 { 473 int i; 474 475 for (i = 0; i < 3; i++) { 476 if (!type || !type[i]) 477 break; 478 479 #define CHECK_SET_TYPE(bit) \ 480 do { \ 481 if (attr->bp_type & bit) \ 482 return -EINVAL; \ 483 else \ 484 attr->bp_type |= bit; \ 485 } while (0) 486 487 switch (type[i]) { 488 case 'r': 489 CHECK_SET_TYPE(HW_BREAKPOINT_R); 490 break; 491 case 'w': 492 CHECK_SET_TYPE(HW_BREAKPOINT_W); 493 break; 494 case 'x': 495 CHECK_SET_TYPE(HW_BREAKPOINT_X); 496 break; 497 default: 498 return -EINVAL; 499 } 500 } 501 502 #undef CHECK_SET_TYPE 503 504 if (!attr->bp_type) /* Default */ 505 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; 506 507 return 0; 508 } 509 510 int parse_events_add_breakpoint(struct list_head **list, int *idx, 511 void *ptr, char *type) 512 { 513 struct perf_event_attr attr; 514 515 memset(&attr, 0, sizeof(attr)); 516 attr.bp_addr = (unsigned long) ptr; 517 518 if (parse_breakpoint_type(type, &attr)) 519 return -EINVAL; 520 521 /* 522 * We should find a nice way to override the access length 523 * Provide some defaults for now 524 */ 525 if (attr.bp_type == HW_BREAKPOINT_X) 526 attr.bp_len = sizeof(long); 527 else 528 attr.bp_len = HW_BREAKPOINT_LEN_4; 529 530 attr.type = PERF_TYPE_BREAKPOINT; 531 attr.sample_period = 1; 532 533 return add_event(list, idx, &attr, NULL); 534 } 535 536 static int config_term(struct perf_event_attr *attr, 537 struct parse_events_term *term) 538 { 539 #define CHECK_TYPE_VAL(type) \ 540 do { \ 541 if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \ 542 return -EINVAL; \ 543 } while (0) 544 545 switch (term->type_term) { 546 case PARSE_EVENTS__TERM_TYPE_CONFIG: 547 CHECK_TYPE_VAL(NUM); 548 attr->config = term->val.num; 549 break; 550 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 551 CHECK_TYPE_VAL(NUM); 552 attr->config1 = term->val.num; 553 break; 554 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 555 CHECK_TYPE_VAL(NUM); 556 attr->config2 = term->val.num; 557 break; 558 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 559 CHECK_TYPE_VAL(NUM); 560 attr->sample_period = term->val.num; 561 break; 562 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 563 /* 564 * TODO uncomment when the field is available 565 * attr->branch_sample_type = term->val.num; 566 */ 567 break; 568 case PARSE_EVENTS__TERM_TYPE_NAME: 569 CHECK_TYPE_VAL(STR); 570 break; 571 default: 572 return -EINVAL; 573 } 574 575 return 0; 576 #undef CHECK_TYPE_VAL 577 } 578 579 static int config_attr(struct perf_event_attr *attr, 580 struct list_head *head, int fail) 581 { 582 struct parse_events_term *term; 583 584 list_for_each_entry(term, head, list) 585 if (config_term(attr, term) && fail) 586 return -EINVAL; 587 588 return 0; 589 } 590 591 int parse_events_add_numeric(struct list_head **list, int *idx, 592 u32 type, u64 config, 593 struct list_head *head_config) 594 { 595 struct perf_event_attr attr; 596 597 memset(&attr, 0, sizeof(attr)); 598 attr.type = type; 599 attr.config = config; 600 601 if (head_config && 602 config_attr(&attr, head_config, 1)) 603 return -EINVAL; 604 605 return add_event(list, idx, &attr, NULL); 606 } 607 608 static int parse_events__is_name_term(struct parse_events_term *term) 609 { 610 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME; 611 } 612 613 static char *pmu_event_name(struct list_head *head_terms) 614 { 615 struct parse_events_term *term; 616 617 list_for_each_entry(term, head_terms, list) 618 if (parse_events__is_name_term(term)) 619 return term->val.str; 620 621 return NULL; 622 } 623 624 int parse_events_add_pmu(struct list_head **list, int *idx, 625 char *name, struct list_head *head_config) 626 { 627 struct perf_event_attr attr; 628 struct perf_pmu *pmu; 629 630 pmu = perf_pmu__find(name); 631 if (!pmu) 632 return -EINVAL; 633 634 memset(&attr, 0, sizeof(attr)); 635 636 if (perf_pmu__check_alias(pmu, head_config)) 637 return -EINVAL; 638 639 /* 640 * Configure hardcoded terms first, no need to check 641 * return value when called with fail == 0 ;) 642 */ 643 config_attr(&attr, head_config, 0); 644 645 if (perf_pmu__config(pmu, &attr, head_config)) 646 return -EINVAL; 647 648 return __add_event(list, idx, &attr, pmu_event_name(head_config), 649 pmu->cpus); 650 } 651 652 int parse_events__modifier_group(struct list_head *list, 653 char *event_mod) 654 { 655 return parse_events__modifier_event(list, event_mod, true); 656 } 657 658 void parse_events__set_leader(char *name, struct list_head *list) 659 { 660 struct perf_evsel *leader; 661 662 __perf_evlist__set_leader(list); 663 leader = list_entry(list->next, struct perf_evsel, node); 664 leader->group_name = name ? strdup(name) : NULL; 665 } 666 667 void parse_events_update_lists(struct list_head *list_event, 668 struct list_head *list_all) 669 { 670 /* 671 * Called for single event definition. Update the 672 * 'all event' list, and reinit the 'single event' 673 * list, for next event definition. 674 */ 675 list_splice_tail(list_event, list_all); 676 free(list_event); 677 } 678 679 struct event_modifier { 680 int eu; 681 int ek; 682 int eh; 683 int eH; 684 int eG; 685 int precise; 686 int exclude_GH; 687 }; 688 689 static int get_event_modifier(struct event_modifier *mod, char *str, 690 struct perf_evsel *evsel) 691 { 692 int eu = evsel ? evsel->attr.exclude_user : 0; 693 int ek = evsel ? evsel->attr.exclude_kernel : 0; 694 int eh = evsel ? evsel->attr.exclude_hv : 0; 695 int eH = evsel ? evsel->attr.exclude_host : 0; 696 int eG = evsel ? evsel->attr.exclude_guest : 0; 697 int precise = evsel ? evsel->attr.precise_ip : 0; 698 699 int exclude = eu | ek | eh; 700 int exclude_GH = evsel ? evsel->exclude_GH : 0; 701 702 memset(mod, 0, sizeof(*mod)); 703 704 while (*str) { 705 if (*str == 'u') { 706 if (!exclude) 707 exclude = eu = ek = eh = 1; 708 eu = 0; 709 } else if (*str == 'k') { 710 if (!exclude) 711 exclude = eu = ek = eh = 1; 712 ek = 0; 713 } else if (*str == 'h') { 714 if (!exclude) 715 exclude = eu = ek = eh = 1; 716 eh = 0; 717 } else if (*str == 'G') { 718 if (!exclude_GH) 719 exclude_GH = eG = eH = 1; 720 eG = 0; 721 } else if (*str == 'H') { 722 if (!exclude_GH) 723 exclude_GH = eG = eH = 1; 724 eH = 0; 725 } else if (*str == 'p') { 726 precise++; 727 /* use of precise requires exclude_guest */ 728 if (!exclude_GH) 729 eG = 1; 730 } else 731 break; 732 733 ++str; 734 } 735 736 /* 737 * precise ip: 738 * 739 * 0 - SAMPLE_IP can have arbitrary skid 740 * 1 - SAMPLE_IP must have constant skid 741 * 2 - SAMPLE_IP requested to have 0 skid 742 * 3 - SAMPLE_IP must have 0 skid 743 * 744 * See also PERF_RECORD_MISC_EXACT_IP 745 */ 746 if (precise > 3) 747 return -EINVAL; 748 749 mod->eu = eu; 750 mod->ek = ek; 751 mod->eh = eh; 752 mod->eH = eH; 753 mod->eG = eG; 754 mod->precise = precise; 755 mod->exclude_GH = exclude_GH; 756 return 0; 757 } 758 759 /* 760 * Basic modifier sanity check to validate it contains only one 761 * instance of any modifier (apart from 'p') present. 762 */ 763 static int check_modifier(char *str) 764 { 765 char *p = str; 766 767 /* The sizeof includes 0 byte as well. */ 768 if (strlen(str) > (sizeof("ukhGHppp") - 1)) 769 return -1; 770 771 while (*p) { 772 if (*p != 'p' && strchr(p + 1, *p)) 773 return -1; 774 p++; 775 } 776 777 return 0; 778 } 779 780 int parse_events__modifier_event(struct list_head *list, char *str, bool add) 781 { 782 struct perf_evsel *evsel; 783 struct event_modifier mod; 784 785 if (str == NULL) 786 return 0; 787 788 if (check_modifier(str)) 789 return -EINVAL; 790 791 if (!add && get_event_modifier(&mod, str, NULL)) 792 return -EINVAL; 793 794 list_for_each_entry(evsel, list, node) { 795 796 if (add && get_event_modifier(&mod, str, evsel)) 797 return -EINVAL; 798 799 evsel->attr.exclude_user = mod.eu; 800 evsel->attr.exclude_kernel = mod.ek; 801 evsel->attr.exclude_hv = mod.eh; 802 evsel->attr.precise_ip = mod.precise; 803 evsel->attr.exclude_host = mod.eH; 804 evsel->attr.exclude_guest = mod.eG; 805 evsel->exclude_GH = mod.exclude_GH; 806 } 807 808 return 0; 809 } 810 811 int parse_events_name(struct list_head *list, char *name) 812 { 813 struct perf_evsel *evsel; 814 815 list_for_each_entry(evsel, list, node) { 816 if (!evsel->name) 817 evsel->name = strdup(name); 818 } 819 820 return 0; 821 } 822 823 static int parse_events__scanner(const char *str, void *data, int start_token) 824 { 825 YY_BUFFER_STATE buffer; 826 void *scanner; 827 int ret; 828 829 ret = parse_events_lex_init_extra(start_token, &scanner); 830 if (ret) 831 return ret; 832 833 buffer = parse_events__scan_string(str, scanner); 834 835 #ifdef PARSER_DEBUG 836 parse_events_debug = 1; 837 #endif 838 ret = parse_events_parse(data, scanner); 839 840 parse_events__flush_buffer(buffer, scanner); 841 parse_events__delete_buffer(buffer, scanner); 842 parse_events_lex_destroy(scanner); 843 return ret; 844 } 845 846 /* 847 * parse event config string, return a list of event terms. 848 */ 849 int parse_events_terms(struct list_head *terms, const char *str) 850 { 851 struct parse_events_terms data = { 852 .terms = NULL, 853 }; 854 int ret; 855 856 ret = parse_events__scanner(str, &data, PE_START_TERMS); 857 if (!ret) { 858 list_splice(data.terms, terms); 859 free(data.terms); 860 return 0; 861 } 862 863 if (data.terms) 864 parse_events__free_terms(data.terms); 865 return ret; 866 } 867 868 int parse_events(struct perf_evlist *evlist, const char *str) 869 { 870 struct parse_events_evlist data = { 871 .list = LIST_HEAD_INIT(data.list), 872 .idx = evlist->nr_entries, 873 }; 874 int ret; 875 876 ret = parse_events__scanner(str, &data, PE_START_EVENTS); 877 if (!ret) { 878 int entries = data.idx - evlist->nr_entries; 879 perf_evlist__splice_list_tail(evlist, &data.list, entries); 880 evlist->nr_groups += data.nr_groups; 881 return 0; 882 } 883 884 /* 885 * There are 2 users - builtin-record and builtin-test objects. 886 * Both call perf_evlist__delete in case of error, so we dont 887 * need to bother. 888 */ 889 return ret; 890 } 891 892 int parse_events_option(const struct option *opt, const char *str, 893 int unset __maybe_unused) 894 { 895 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; 896 int ret = parse_events(evlist, str); 897 898 if (ret) { 899 fprintf(stderr, "invalid or unsupported event: '%s'\n", str); 900 fprintf(stderr, "Run 'perf list' for a list of valid events\n"); 901 } 902 return ret; 903 } 904 905 int parse_filter(const struct option *opt, const char *str, 906 int unset __maybe_unused) 907 { 908 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; 909 struct perf_evsel *last = NULL; 910 911 if (evlist->nr_entries > 0) 912 last = perf_evlist__last(evlist); 913 914 if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) { 915 fprintf(stderr, 916 "-F option should follow a -e tracepoint option\n"); 917 return -1; 918 } 919 920 last->filter = strdup(str); 921 if (last->filter == NULL) { 922 fprintf(stderr, "not enough memory to hold filter string\n"); 923 return -1; 924 } 925 926 return 0; 927 } 928 929 static const char * const event_type_descriptors[] = { 930 "Hardware event", 931 "Software event", 932 "Tracepoint event", 933 "Hardware cache event", 934 "Raw hardware event descriptor", 935 "Hardware breakpoint", 936 }; 937 938 /* 939 * Print the events from <debugfs_mount_point>/tracing/events 940 */ 941 942 void print_tracepoint_events(const char *subsys_glob, const char *event_glob, 943 bool name_only) 944 { 945 DIR *sys_dir, *evt_dir; 946 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 947 char evt_path[MAXPATHLEN]; 948 char dir_path[MAXPATHLEN]; 949 950 if (debugfs_valid_mountpoint(tracing_events_path)) 951 return; 952 953 sys_dir = opendir(tracing_events_path); 954 if (!sys_dir) 955 return; 956 957 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 958 if (subsys_glob != NULL && 959 !strglobmatch(sys_dirent.d_name, subsys_glob)) 960 continue; 961 962 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 963 sys_dirent.d_name); 964 evt_dir = opendir(dir_path); 965 if (!evt_dir) 966 continue; 967 968 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 969 if (event_glob != NULL && 970 !strglobmatch(evt_dirent.d_name, event_glob)) 971 continue; 972 973 if (name_only) { 974 printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name); 975 continue; 976 } 977 978 snprintf(evt_path, MAXPATHLEN, "%s:%s", 979 sys_dirent.d_name, evt_dirent.d_name); 980 printf(" %-50s [%s]\n", evt_path, 981 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 982 } 983 closedir(evt_dir); 984 } 985 closedir(sys_dir); 986 } 987 988 /* 989 * Check whether event is in <debugfs_mount_point>/tracing/events 990 */ 991 992 int is_valid_tracepoint(const char *event_string) 993 { 994 DIR *sys_dir, *evt_dir; 995 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 996 char evt_path[MAXPATHLEN]; 997 char dir_path[MAXPATHLEN]; 998 999 if (debugfs_valid_mountpoint(tracing_events_path)) 1000 return 0; 1001 1002 sys_dir = opendir(tracing_events_path); 1003 if (!sys_dir) 1004 return 0; 1005 1006 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 1007 1008 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 1009 sys_dirent.d_name); 1010 evt_dir = opendir(dir_path); 1011 if (!evt_dir) 1012 continue; 1013 1014 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 1015 snprintf(evt_path, MAXPATHLEN, "%s:%s", 1016 sys_dirent.d_name, evt_dirent.d_name); 1017 if (!strcmp(evt_path, event_string)) { 1018 closedir(evt_dir); 1019 closedir(sys_dir); 1020 return 1; 1021 } 1022 } 1023 closedir(evt_dir); 1024 } 1025 closedir(sys_dir); 1026 return 0; 1027 } 1028 1029 static void __print_events_type(u8 type, struct event_symbol *syms, 1030 unsigned max) 1031 { 1032 char name[64]; 1033 unsigned i; 1034 1035 for (i = 0; i < max ; i++, syms++) { 1036 if (strlen(syms->alias)) 1037 snprintf(name, sizeof(name), "%s OR %s", 1038 syms->symbol, syms->alias); 1039 else 1040 snprintf(name, sizeof(name), "%s", syms->symbol); 1041 1042 printf(" %-50s [%s]\n", name, 1043 event_type_descriptors[type]); 1044 } 1045 } 1046 1047 void print_events_type(u8 type) 1048 { 1049 if (type == PERF_TYPE_SOFTWARE) 1050 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX); 1051 else 1052 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX); 1053 } 1054 1055 int print_hwcache_events(const char *event_glob, bool name_only) 1056 { 1057 unsigned int type, op, i, printed = 0; 1058 char name[64]; 1059 1060 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 1061 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 1062 /* skip invalid cache type */ 1063 if (!perf_evsel__is_cache_op_valid(type, op)) 1064 continue; 1065 1066 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 1067 __perf_evsel__hw_cache_type_op_res_name(type, op, i, 1068 name, sizeof(name)); 1069 if (event_glob != NULL && !strglobmatch(name, event_glob)) 1070 continue; 1071 1072 if (name_only) 1073 printf("%s ", name); 1074 else 1075 printf(" %-50s [%s]\n", name, 1076 event_type_descriptors[PERF_TYPE_HW_CACHE]); 1077 ++printed; 1078 } 1079 } 1080 } 1081 1082 return printed; 1083 } 1084 1085 static void print_symbol_events(const char *event_glob, unsigned type, 1086 struct event_symbol *syms, unsigned max, 1087 bool name_only) 1088 { 1089 unsigned i, printed = 0; 1090 char name[MAX_NAME_LEN]; 1091 1092 for (i = 0; i < max; i++, syms++) { 1093 1094 if (event_glob != NULL && 1095 !(strglobmatch(syms->symbol, event_glob) || 1096 (syms->alias && strglobmatch(syms->alias, event_glob)))) 1097 continue; 1098 1099 if (name_only) { 1100 printf("%s ", syms->symbol); 1101 continue; 1102 } 1103 1104 if (strlen(syms->alias)) 1105 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); 1106 else 1107 strncpy(name, syms->symbol, MAX_NAME_LEN); 1108 1109 printf(" %-50s [%s]\n", name, event_type_descriptors[type]); 1110 1111 printed++; 1112 } 1113 1114 if (printed) 1115 printf("\n"); 1116 } 1117 1118 /* 1119 * Print the help text for the event symbols: 1120 */ 1121 void print_events(const char *event_glob, bool name_only) 1122 { 1123 if (!name_only) { 1124 printf("\n"); 1125 printf("List of pre-defined events (to be used in -e):\n"); 1126 } 1127 1128 print_symbol_events(event_glob, PERF_TYPE_HARDWARE, 1129 event_symbols_hw, PERF_COUNT_HW_MAX, name_only); 1130 1131 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE, 1132 event_symbols_sw, PERF_COUNT_SW_MAX, name_only); 1133 1134 print_hwcache_events(event_glob, name_only); 1135 1136 if (event_glob != NULL) 1137 return; 1138 1139 if (!name_only) { 1140 printf("\n"); 1141 printf(" %-50s [%s]\n", 1142 "rNNN", 1143 event_type_descriptors[PERF_TYPE_RAW]); 1144 printf(" %-50s [%s]\n", 1145 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 1146 event_type_descriptors[PERF_TYPE_RAW]); 1147 printf(" (see 'man perf-list' on how to encode it)\n"); 1148 printf("\n"); 1149 1150 printf(" %-50s [%s]\n", 1151 "mem:<addr>[:access]", 1152 event_type_descriptors[PERF_TYPE_BREAKPOINT]); 1153 printf("\n"); 1154 } 1155 1156 print_tracepoint_events(NULL, NULL, name_only); 1157 } 1158 1159 int parse_events__is_hardcoded_term(struct parse_events_term *term) 1160 { 1161 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; 1162 } 1163 1164 static int new_term(struct parse_events_term **_term, int type_val, 1165 int type_term, char *config, 1166 char *str, u64 num) 1167 { 1168 struct parse_events_term *term; 1169 1170 term = zalloc(sizeof(*term)); 1171 if (!term) 1172 return -ENOMEM; 1173 1174 INIT_LIST_HEAD(&term->list); 1175 term->type_val = type_val; 1176 term->type_term = type_term; 1177 term->config = config; 1178 1179 switch (type_val) { 1180 case PARSE_EVENTS__TERM_TYPE_NUM: 1181 term->val.num = num; 1182 break; 1183 case PARSE_EVENTS__TERM_TYPE_STR: 1184 term->val.str = str; 1185 break; 1186 default: 1187 free(term); 1188 return -EINVAL; 1189 } 1190 1191 *_term = term; 1192 return 0; 1193 } 1194 1195 int parse_events_term__num(struct parse_events_term **term, 1196 int type_term, char *config, u64 num) 1197 { 1198 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term, 1199 config, NULL, num); 1200 } 1201 1202 int parse_events_term__str(struct parse_events_term **term, 1203 int type_term, char *config, char *str) 1204 { 1205 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term, 1206 config, str, 0); 1207 } 1208 1209 int parse_events_term__sym_hw(struct parse_events_term **term, 1210 char *config, unsigned idx) 1211 { 1212 struct event_symbol *sym; 1213 1214 BUG_ON(idx >= PERF_COUNT_HW_MAX); 1215 sym = &event_symbols_hw[idx]; 1216 1217 if (config) 1218 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, 1219 PARSE_EVENTS__TERM_TYPE_USER, config, 1220 (char *) sym->symbol, 0); 1221 else 1222 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, 1223 PARSE_EVENTS__TERM_TYPE_USER, 1224 (char *) "event", (char *) sym->symbol, 0); 1225 } 1226 1227 int parse_events_term__clone(struct parse_events_term **new, 1228 struct parse_events_term *term) 1229 { 1230 return new_term(new, term->type_val, term->type_term, term->config, 1231 term->val.str, term->val.num); 1232 } 1233 1234 void parse_events__free_terms(struct list_head *terms) 1235 { 1236 struct parse_events_term *term, *h; 1237 1238 list_for_each_entry_safe(term, h, terms, list) 1239 free(term); 1240 1241 free(terms); 1242 } 1243