1 #include <linux/hw_breakpoint.h> 2 #include <linux/err.h> 3 #include "util.h" 4 #include "../perf.h" 5 #include "evlist.h" 6 #include "evsel.h" 7 #include "parse-options.h" 8 #include "parse-events.h" 9 #include "exec_cmd.h" 10 #include "string.h" 11 #include "symbol.h" 12 #include "cache.h" 13 #include "header.h" 14 #include "bpf-loader.h" 15 #include "debug.h" 16 #include <api/fs/tracing_path.h> 17 #include "parse-events-bison.h" 18 #define YY_EXTRA_TYPE int 19 #include "parse-events-flex.h" 20 #include "pmu.h" 21 #include "thread_map.h" 22 #include "cpumap.h" 23 #include "asm/bug.h" 24 25 #define MAX_NAME_LEN 100 26 27 #ifdef PARSER_DEBUG 28 extern int parse_events_debug; 29 #endif 30 int parse_events_parse(void *data, void *scanner); 31 static int get_config_terms(struct list_head *head_config, 32 struct list_head *head_terms __maybe_unused); 33 34 static struct perf_pmu_event_symbol *perf_pmu_events_list; 35 /* 36 * The variable indicates the number of supported pmu event symbols. 37 * 0 means not initialized and ready to init 38 * -1 means failed to init, don't try anymore 39 * >0 is the number of supported pmu event symbols 40 */ 41 static int perf_pmu_events_list_num; 42 43 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { 44 [PERF_COUNT_HW_CPU_CYCLES] = { 45 .symbol = "cpu-cycles", 46 .alias = "cycles", 47 }, 48 [PERF_COUNT_HW_INSTRUCTIONS] = { 49 .symbol = "instructions", 50 .alias = "", 51 }, 52 [PERF_COUNT_HW_CACHE_REFERENCES] = { 53 .symbol = "cache-references", 54 .alias = "", 55 }, 56 [PERF_COUNT_HW_CACHE_MISSES] = { 57 .symbol = "cache-misses", 58 .alias = "", 59 }, 60 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 61 .symbol = "branch-instructions", 62 .alias = "branches", 63 }, 64 [PERF_COUNT_HW_BRANCH_MISSES] = { 65 .symbol = "branch-misses", 66 .alias = "", 67 }, 68 [PERF_COUNT_HW_BUS_CYCLES] = { 69 .symbol = "bus-cycles", 70 .alias = "", 71 }, 72 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { 73 .symbol = "stalled-cycles-frontend", 74 .alias = "idle-cycles-frontend", 75 }, 76 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { 77 .symbol = "stalled-cycles-backend", 78 .alias = "idle-cycles-backend", 79 }, 80 [PERF_COUNT_HW_REF_CPU_CYCLES] = { 81 .symbol = "ref-cycles", 82 .alias = "", 83 }, 84 }; 85 86 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { 87 [PERF_COUNT_SW_CPU_CLOCK] = { 88 .symbol = "cpu-clock", 89 .alias = "", 90 }, 91 [PERF_COUNT_SW_TASK_CLOCK] = { 92 .symbol = "task-clock", 93 .alias = "", 94 }, 95 [PERF_COUNT_SW_PAGE_FAULTS] = { 96 .symbol = "page-faults", 97 .alias = "faults", 98 }, 99 [PERF_COUNT_SW_CONTEXT_SWITCHES] = { 100 .symbol = "context-switches", 101 .alias = "cs", 102 }, 103 [PERF_COUNT_SW_CPU_MIGRATIONS] = { 104 .symbol = "cpu-migrations", 105 .alias = "migrations", 106 }, 107 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { 108 .symbol = "minor-faults", 109 .alias = "", 110 }, 111 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { 112 .symbol = "major-faults", 113 .alias = "", 114 }, 115 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { 116 .symbol = "alignment-faults", 117 .alias = "", 118 }, 119 [PERF_COUNT_SW_EMULATION_FAULTS] = { 120 .symbol = "emulation-faults", 121 .alias = "", 122 }, 123 [PERF_COUNT_SW_DUMMY] = { 124 .symbol = "dummy", 125 .alias = "", 126 }, 127 }; 128 129 #define __PERF_EVENT_FIELD(config, name) \ 130 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT) 131 132 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW) 133 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG) 134 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE) 135 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT) 136 137 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \ 138 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \ 139 if (sys_dirent.d_type == DT_DIR && \ 140 (strcmp(sys_dirent.d_name, ".")) && \ 141 (strcmp(sys_dirent.d_name, ".."))) 142 143 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir) 144 { 145 char evt_path[MAXPATHLEN]; 146 int fd; 147 148 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path, 149 sys_dir->d_name, evt_dir->d_name); 150 fd = open(evt_path, O_RDONLY); 151 if (fd < 0) 152 return -EINVAL; 153 close(fd); 154 155 return 0; 156 } 157 158 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \ 159 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \ 160 if (evt_dirent.d_type == DT_DIR && \ 161 (strcmp(evt_dirent.d_name, ".")) && \ 162 (strcmp(evt_dirent.d_name, "..")) && \ 163 (!tp_event_has_id(&sys_dirent, &evt_dirent))) 164 165 #define MAX_EVENT_LENGTH 512 166 167 168 struct tracepoint_path *tracepoint_id_to_path(u64 config) 169 { 170 struct tracepoint_path *path = NULL; 171 DIR *sys_dir, *evt_dir; 172 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 173 char id_buf[24]; 174 int fd; 175 u64 id; 176 char evt_path[MAXPATHLEN]; 177 char dir_path[MAXPATHLEN]; 178 179 sys_dir = opendir(tracing_events_path); 180 if (!sys_dir) 181 return NULL; 182 183 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 184 185 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 186 sys_dirent.d_name); 187 evt_dir = opendir(dir_path); 188 if (!evt_dir) 189 continue; 190 191 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 192 193 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, 194 evt_dirent.d_name); 195 fd = open(evt_path, O_RDONLY); 196 if (fd < 0) 197 continue; 198 if (read(fd, id_buf, sizeof(id_buf)) < 0) { 199 close(fd); 200 continue; 201 } 202 close(fd); 203 id = atoll(id_buf); 204 if (id == config) { 205 closedir(evt_dir); 206 closedir(sys_dir); 207 path = zalloc(sizeof(*path)); 208 path->system = malloc(MAX_EVENT_LENGTH); 209 if (!path->system) { 210 free(path); 211 return NULL; 212 } 213 path->name = malloc(MAX_EVENT_LENGTH); 214 if (!path->name) { 215 zfree(&path->system); 216 free(path); 217 return NULL; 218 } 219 strncpy(path->system, sys_dirent.d_name, 220 MAX_EVENT_LENGTH); 221 strncpy(path->name, evt_dirent.d_name, 222 MAX_EVENT_LENGTH); 223 return path; 224 } 225 } 226 closedir(evt_dir); 227 } 228 229 closedir(sys_dir); 230 return NULL; 231 } 232 233 struct tracepoint_path *tracepoint_name_to_path(const char *name) 234 { 235 struct tracepoint_path *path = zalloc(sizeof(*path)); 236 char *str = strchr(name, ':'); 237 238 if (path == NULL || str == NULL) { 239 free(path); 240 return NULL; 241 } 242 243 path->system = strndup(name, str - name); 244 path->name = strdup(str+1); 245 246 if (path->system == NULL || path->name == NULL) { 247 zfree(&path->system); 248 zfree(&path->name); 249 free(path); 250 path = NULL; 251 } 252 253 return path; 254 } 255 256 const char *event_type(int type) 257 { 258 switch (type) { 259 case PERF_TYPE_HARDWARE: 260 return "hardware"; 261 262 case PERF_TYPE_SOFTWARE: 263 return "software"; 264 265 case PERF_TYPE_TRACEPOINT: 266 return "tracepoint"; 267 268 case PERF_TYPE_HW_CACHE: 269 return "hardware-cache"; 270 271 default: 272 break; 273 } 274 275 return "unknown"; 276 } 277 278 279 280 static struct perf_evsel * 281 __add_event(struct list_head *list, int *idx, 282 struct perf_event_attr *attr, 283 char *name, struct cpu_map *cpus, 284 struct list_head *config_terms) 285 { 286 struct perf_evsel *evsel; 287 288 event_attr_init(attr); 289 290 evsel = perf_evsel__new_idx(attr, (*idx)++); 291 if (!evsel) 292 return NULL; 293 294 evsel->cpus = cpu_map__get(cpus); 295 evsel->own_cpus = cpu_map__get(cpus); 296 297 if (name) 298 evsel->name = strdup(name); 299 300 if (config_terms) 301 list_splice(config_terms, &evsel->config_terms); 302 303 list_add_tail(&evsel->node, list); 304 return evsel; 305 } 306 307 static int add_event(struct list_head *list, int *idx, 308 struct perf_event_attr *attr, char *name, 309 struct list_head *config_terms) 310 { 311 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM; 312 } 313 314 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size) 315 { 316 int i, j; 317 int n, longest = -1; 318 319 for (i = 0; i < size; i++) { 320 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) { 321 n = strlen(names[i][j]); 322 if (n > longest && !strncasecmp(str, names[i][j], n)) 323 longest = n; 324 } 325 if (longest > 0) 326 return i; 327 } 328 329 return -1; 330 } 331 332 int parse_events_add_cache(struct list_head *list, int *idx, 333 char *type, char *op_result1, char *op_result2) 334 { 335 struct perf_event_attr attr; 336 char name[MAX_NAME_LEN]; 337 int cache_type = -1, cache_op = -1, cache_result = -1; 338 char *op_result[2] = { op_result1, op_result2 }; 339 int i, n; 340 341 /* 342 * No fallback - if we cannot get a clear cache type 343 * then bail out: 344 */ 345 cache_type = parse_aliases(type, perf_evsel__hw_cache, 346 PERF_COUNT_HW_CACHE_MAX); 347 if (cache_type == -1) 348 return -EINVAL; 349 350 n = snprintf(name, MAX_NAME_LEN, "%s", type); 351 352 for (i = 0; (i < 2) && (op_result[i]); i++) { 353 char *str = op_result[i]; 354 355 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); 356 357 if (cache_op == -1) { 358 cache_op = parse_aliases(str, perf_evsel__hw_cache_op, 359 PERF_COUNT_HW_CACHE_OP_MAX); 360 if (cache_op >= 0) { 361 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op)) 362 return -EINVAL; 363 continue; 364 } 365 } 366 367 if (cache_result == -1) { 368 cache_result = parse_aliases(str, perf_evsel__hw_cache_result, 369 PERF_COUNT_HW_CACHE_RESULT_MAX); 370 if (cache_result >= 0) 371 continue; 372 } 373 } 374 375 /* 376 * Fall back to reads: 377 */ 378 if (cache_op == -1) 379 cache_op = PERF_COUNT_HW_CACHE_OP_READ; 380 381 /* 382 * Fall back to accesses: 383 */ 384 if (cache_result == -1) 385 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; 386 387 memset(&attr, 0, sizeof(attr)); 388 attr.config = cache_type | (cache_op << 8) | (cache_result << 16); 389 attr.type = PERF_TYPE_HW_CACHE; 390 return add_event(list, idx, &attr, name, NULL); 391 } 392 393 static void tracepoint_error(struct parse_events_error *e, int err, 394 char *sys, char *name) 395 { 396 char help[BUFSIZ]; 397 398 /* 399 * We get error directly from syscall errno ( > 0), 400 * or from encoded pointer's error ( < 0). 401 */ 402 err = abs(err); 403 404 switch (err) { 405 case EACCES: 406 e->str = strdup("can't access trace events"); 407 break; 408 case ENOENT: 409 e->str = strdup("unknown tracepoint"); 410 break; 411 default: 412 e->str = strdup("failed to add tracepoint"); 413 break; 414 } 415 416 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); 417 e->help = strdup(help); 418 } 419 420 static int add_tracepoint(struct list_head *list, int *idx, 421 char *sys_name, char *evt_name, 422 struct parse_events_error *err, 423 struct list_head *head_config) 424 { 425 struct perf_evsel *evsel; 426 427 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++); 428 if (IS_ERR(evsel)) { 429 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name); 430 return PTR_ERR(evsel); 431 } 432 433 if (head_config) { 434 LIST_HEAD(config_terms); 435 436 if (get_config_terms(head_config, &config_terms)) 437 return -ENOMEM; 438 list_splice(&config_terms, &evsel->config_terms); 439 } 440 441 list_add_tail(&evsel->node, list); 442 return 0; 443 } 444 445 static int add_tracepoint_multi_event(struct list_head *list, int *idx, 446 char *sys_name, char *evt_name, 447 struct parse_events_error *err, 448 struct list_head *head_config) 449 { 450 char evt_path[MAXPATHLEN]; 451 struct dirent *evt_ent; 452 DIR *evt_dir; 453 int ret = 0, found = 0; 454 455 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name); 456 evt_dir = opendir(evt_path); 457 if (!evt_dir) { 458 tracepoint_error(err, errno, sys_name, evt_name); 459 return -1; 460 } 461 462 while (!ret && (evt_ent = readdir(evt_dir))) { 463 if (!strcmp(evt_ent->d_name, ".") 464 || !strcmp(evt_ent->d_name, "..") 465 || !strcmp(evt_ent->d_name, "enable") 466 || !strcmp(evt_ent->d_name, "filter")) 467 continue; 468 469 if (!strglobmatch(evt_ent->d_name, evt_name)) 470 continue; 471 472 found++; 473 474 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, 475 err, head_config); 476 } 477 478 if (!found) { 479 tracepoint_error(err, ENOENT, sys_name, evt_name); 480 ret = -1; 481 } 482 483 closedir(evt_dir); 484 return ret; 485 } 486 487 static int add_tracepoint_event(struct list_head *list, int *idx, 488 char *sys_name, char *evt_name, 489 struct parse_events_error *err, 490 struct list_head *head_config) 491 { 492 return strpbrk(evt_name, "*?") ? 493 add_tracepoint_multi_event(list, idx, sys_name, evt_name, 494 err, head_config) : 495 add_tracepoint(list, idx, sys_name, evt_name, 496 err, head_config); 497 } 498 499 static int add_tracepoint_multi_sys(struct list_head *list, int *idx, 500 char *sys_name, char *evt_name, 501 struct parse_events_error *err, 502 struct list_head *head_config) 503 { 504 struct dirent *events_ent; 505 DIR *events_dir; 506 int ret = 0; 507 508 events_dir = opendir(tracing_events_path); 509 if (!events_dir) { 510 tracepoint_error(err, errno, sys_name, evt_name); 511 return -1; 512 } 513 514 while (!ret && (events_ent = readdir(events_dir))) { 515 if (!strcmp(events_ent->d_name, ".") 516 || !strcmp(events_ent->d_name, "..") 517 || !strcmp(events_ent->d_name, "enable") 518 || !strcmp(events_ent->d_name, "header_event") 519 || !strcmp(events_ent->d_name, "header_page")) 520 continue; 521 522 if (!strglobmatch(events_ent->d_name, sys_name)) 523 continue; 524 525 ret = add_tracepoint_event(list, idx, events_ent->d_name, 526 evt_name, err, head_config); 527 } 528 529 closedir(events_dir); 530 return ret; 531 } 532 533 struct __add_bpf_event_param { 534 struct parse_events_evlist *data; 535 struct list_head *list; 536 }; 537 538 static int add_bpf_event(struct probe_trace_event *tev, int fd, 539 void *_param) 540 { 541 LIST_HEAD(new_evsels); 542 struct __add_bpf_event_param *param = _param; 543 struct parse_events_evlist *evlist = param->data; 544 struct list_head *list = param->list; 545 struct perf_evsel *pos; 546 int err; 547 548 pr_debug("add bpf event %s:%s and attach bpf program %d\n", 549 tev->group, tev->event, fd); 550 551 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, tev->group, 552 tev->event, evlist->error, NULL); 553 if (err) { 554 struct perf_evsel *evsel, *tmp; 555 556 pr_debug("Failed to add BPF event %s:%s\n", 557 tev->group, tev->event); 558 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) { 559 list_del(&evsel->node); 560 perf_evsel__delete(evsel); 561 } 562 return err; 563 } 564 pr_debug("adding %s:%s\n", tev->group, tev->event); 565 566 list_for_each_entry(pos, &new_evsels, node) { 567 pr_debug("adding %s:%s to %p\n", 568 tev->group, tev->event, pos); 569 pos->bpf_fd = fd; 570 } 571 list_splice(&new_evsels, list); 572 return 0; 573 } 574 575 int parse_events_load_bpf_obj(struct parse_events_evlist *data, 576 struct list_head *list, 577 struct bpf_object *obj) 578 { 579 int err; 580 char errbuf[BUFSIZ]; 581 struct __add_bpf_event_param param = {data, list}; 582 static bool registered_unprobe_atexit = false; 583 584 if (IS_ERR(obj) || !obj) { 585 snprintf(errbuf, sizeof(errbuf), 586 "Internal error: load bpf obj with NULL"); 587 err = -EINVAL; 588 goto errout; 589 } 590 591 /* 592 * Register atexit handler before calling bpf__probe() so 593 * bpf__probe() don't need to unprobe probe points its already 594 * created when failure. 595 */ 596 if (!registered_unprobe_atexit) { 597 atexit(bpf__clear); 598 registered_unprobe_atexit = true; 599 } 600 601 err = bpf__probe(obj); 602 if (err) { 603 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf)); 604 goto errout; 605 } 606 607 err = bpf__load(obj); 608 if (err) { 609 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf)); 610 goto errout; 611 } 612 613 err = bpf__foreach_tev(obj, add_bpf_event, ¶m); 614 if (err) { 615 snprintf(errbuf, sizeof(errbuf), 616 "Attach events in BPF object failed"); 617 goto errout; 618 } 619 620 return 0; 621 errout: 622 data->error->help = strdup("(add -v to see detail)"); 623 data->error->str = strdup(errbuf); 624 return err; 625 } 626 627 int parse_events_load_bpf(struct parse_events_evlist *data, 628 struct list_head *list, 629 char *bpf_file_name, 630 bool source) 631 { 632 struct bpf_object *obj; 633 634 obj = bpf__prepare_load(bpf_file_name, source); 635 if (IS_ERR(obj)) { 636 char errbuf[BUFSIZ]; 637 int err; 638 639 err = PTR_ERR(obj); 640 641 if (err == -ENOTSUP) 642 snprintf(errbuf, sizeof(errbuf), 643 "BPF support is not compiled"); 644 else 645 bpf__strerror_prepare_load(bpf_file_name, 646 source, 647 -err, errbuf, 648 sizeof(errbuf)); 649 650 data->error->help = strdup("(add -v to see detail)"); 651 data->error->str = strdup(errbuf); 652 return err; 653 } 654 655 return parse_events_load_bpf_obj(data, list, obj); 656 } 657 658 static int 659 parse_breakpoint_type(const char *type, struct perf_event_attr *attr) 660 { 661 int i; 662 663 for (i = 0; i < 3; i++) { 664 if (!type || !type[i]) 665 break; 666 667 #define CHECK_SET_TYPE(bit) \ 668 do { \ 669 if (attr->bp_type & bit) \ 670 return -EINVAL; \ 671 else \ 672 attr->bp_type |= bit; \ 673 } while (0) 674 675 switch (type[i]) { 676 case 'r': 677 CHECK_SET_TYPE(HW_BREAKPOINT_R); 678 break; 679 case 'w': 680 CHECK_SET_TYPE(HW_BREAKPOINT_W); 681 break; 682 case 'x': 683 CHECK_SET_TYPE(HW_BREAKPOINT_X); 684 break; 685 default: 686 return -EINVAL; 687 } 688 } 689 690 #undef CHECK_SET_TYPE 691 692 if (!attr->bp_type) /* Default */ 693 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; 694 695 return 0; 696 } 697 698 int parse_events_add_breakpoint(struct list_head *list, int *idx, 699 void *ptr, char *type, u64 len) 700 { 701 struct perf_event_attr attr; 702 703 memset(&attr, 0, sizeof(attr)); 704 attr.bp_addr = (unsigned long) ptr; 705 706 if (parse_breakpoint_type(type, &attr)) 707 return -EINVAL; 708 709 /* Provide some defaults if len is not specified */ 710 if (!len) { 711 if (attr.bp_type == HW_BREAKPOINT_X) 712 len = sizeof(long); 713 else 714 len = HW_BREAKPOINT_LEN_4; 715 } 716 717 attr.bp_len = len; 718 719 attr.type = PERF_TYPE_BREAKPOINT; 720 attr.sample_period = 1; 721 722 return add_event(list, idx, &attr, NULL, NULL); 723 } 724 725 static int check_type_val(struct parse_events_term *term, 726 struct parse_events_error *err, 727 int type) 728 { 729 if (type == term->type_val) 730 return 0; 731 732 if (err) { 733 err->idx = term->err_val; 734 if (type == PARSE_EVENTS__TERM_TYPE_NUM) 735 err->str = strdup("expected numeric value"); 736 else 737 err->str = strdup("expected string value"); 738 } 739 return -EINVAL; 740 } 741 742 typedef int config_term_func_t(struct perf_event_attr *attr, 743 struct parse_events_term *term, 744 struct parse_events_error *err); 745 746 static int config_term_common(struct perf_event_attr *attr, 747 struct parse_events_term *term, 748 struct parse_events_error *err) 749 { 750 #define CHECK_TYPE_VAL(type) \ 751 do { \ 752 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \ 753 return -EINVAL; \ 754 } while (0) 755 756 switch (term->type_term) { 757 case PARSE_EVENTS__TERM_TYPE_CONFIG: 758 CHECK_TYPE_VAL(NUM); 759 attr->config = term->val.num; 760 break; 761 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 762 CHECK_TYPE_VAL(NUM); 763 attr->config1 = term->val.num; 764 break; 765 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 766 CHECK_TYPE_VAL(NUM); 767 attr->config2 = term->val.num; 768 break; 769 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 770 CHECK_TYPE_VAL(NUM); 771 break; 772 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 773 CHECK_TYPE_VAL(NUM); 774 break; 775 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 776 /* 777 * TODO uncomment when the field is available 778 * attr->branch_sample_type = term->val.num; 779 */ 780 break; 781 case PARSE_EVENTS__TERM_TYPE_TIME: 782 CHECK_TYPE_VAL(NUM); 783 if (term->val.num > 1) { 784 err->str = strdup("expected 0 or 1"); 785 err->idx = term->err_val; 786 return -EINVAL; 787 } 788 break; 789 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 790 CHECK_TYPE_VAL(STR); 791 break; 792 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 793 CHECK_TYPE_VAL(NUM); 794 break; 795 case PARSE_EVENTS__TERM_TYPE_INHERIT: 796 CHECK_TYPE_VAL(NUM); 797 break; 798 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 799 CHECK_TYPE_VAL(NUM); 800 break; 801 case PARSE_EVENTS__TERM_TYPE_NAME: 802 CHECK_TYPE_VAL(STR); 803 break; 804 default: 805 err->str = strdup("unknown term"); 806 err->idx = term->err_term; 807 err->help = parse_events_formats_error_string(NULL); 808 return -EINVAL; 809 } 810 811 return 0; 812 #undef CHECK_TYPE_VAL 813 } 814 815 static int config_term_pmu(struct perf_event_attr *attr, 816 struct parse_events_term *term, 817 struct parse_events_error *err) 818 { 819 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER) 820 /* 821 * Always succeed for sysfs terms, as we dont know 822 * at this point what type they need to have. 823 */ 824 return 0; 825 else 826 return config_term_common(attr, term, err); 827 } 828 829 static int config_term_tracepoint(struct perf_event_attr *attr, 830 struct parse_events_term *term, 831 struct parse_events_error *err) 832 { 833 switch (term->type_term) { 834 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 835 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 836 case PARSE_EVENTS__TERM_TYPE_INHERIT: 837 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 838 return config_term_common(attr, term, err); 839 default: 840 if (err) { 841 err->idx = term->err_term; 842 err->str = strdup("unknown term"); 843 err->help = strdup("valid terms: call-graph,stack-size\n"); 844 } 845 return -EINVAL; 846 } 847 848 return 0; 849 } 850 851 static int config_attr(struct perf_event_attr *attr, 852 struct list_head *head, 853 struct parse_events_error *err, 854 config_term_func_t config_term) 855 { 856 struct parse_events_term *term; 857 858 list_for_each_entry(term, head, list) 859 if (config_term(attr, term, err)) 860 return -EINVAL; 861 862 return 0; 863 } 864 865 static int get_config_terms(struct list_head *head_config, 866 struct list_head *head_terms __maybe_unused) 867 { 868 #define ADD_CONFIG_TERM(__type, __name, __val) \ 869 do { \ 870 struct perf_evsel_config_term *__t; \ 871 \ 872 __t = zalloc(sizeof(*__t)); \ 873 if (!__t) \ 874 return -ENOMEM; \ 875 \ 876 INIT_LIST_HEAD(&__t->list); \ 877 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \ 878 __t->val.__name = __val; \ 879 list_add_tail(&__t->list, head_terms); \ 880 } while (0) 881 882 struct parse_events_term *term; 883 884 list_for_each_entry(term, head_config, list) { 885 switch (term->type_term) { 886 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 887 ADD_CONFIG_TERM(PERIOD, period, term->val.num); 888 break; 889 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 890 ADD_CONFIG_TERM(FREQ, freq, term->val.num); 891 break; 892 case PARSE_EVENTS__TERM_TYPE_TIME: 893 ADD_CONFIG_TERM(TIME, time, term->val.num); 894 break; 895 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 896 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str); 897 break; 898 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 899 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num); 900 break; 901 case PARSE_EVENTS__TERM_TYPE_INHERIT: 902 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0); 903 break; 904 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 905 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1); 906 break; 907 default: 908 break; 909 } 910 } 911 #undef ADD_EVSEL_CONFIG 912 return 0; 913 } 914 915 int parse_events_add_tracepoint(struct list_head *list, int *idx, 916 char *sys, char *event, 917 struct parse_events_error *err, 918 struct list_head *head_config) 919 { 920 if (head_config) { 921 struct perf_event_attr attr; 922 923 if (config_attr(&attr, head_config, err, 924 config_term_tracepoint)) 925 return -EINVAL; 926 } 927 928 if (strpbrk(sys, "*?")) 929 return add_tracepoint_multi_sys(list, idx, sys, event, 930 err, head_config); 931 else 932 return add_tracepoint_event(list, idx, sys, event, 933 err, head_config); 934 } 935 936 int parse_events_add_numeric(struct parse_events_evlist *data, 937 struct list_head *list, 938 u32 type, u64 config, 939 struct list_head *head_config) 940 { 941 struct perf_event_attr attr; 942 LIST_HEAD(config_terms); 943 944 memset(&attr, 0, sizeof(attr)); 945 attr.type = type; 946 attr.config = config; 947 948 if (head_config) { 949 if (config_attr(&attr, head_config, data->error, 950 config_term_common)) 951 return -EINVAL; 952 953 if (get_config_terms(head_config, &config_terms)) 954 return -ENOMEM; 955 } 956 957 return add_event(list, &data->idx, &attr, NULL, &config_terms); 958 } 959 960 static int parse_events__is_name_term(struct parse_events_term *term) 961 { 962 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME; 963 } 964 965 static char *pmu_event_name(struct list_head *head_terms) 966 { 967 struct parse_events_term *term; 968 969 list_for_each_entry(term, head_terms, list) 970 if (parse_events__is_name_term(term)) 971 return term->val.str; 972 973 return NULL; 974 } 975 976 int parse_events_add_pmu(struct parse_events_evlist *data, 977 struct list_head *list, char *name, 978 struct list_head *head_config) 979 { 980 struct perf_event_attr attr; 981 struct perf_pmu_info info; 982 struct perf_pmu *pmu; 983 struct perf_evsel *evsel; 984 LIST_HEAD(config_terms); 985 986 pmu = perf_pmu__find(name); 987 if (!pmu) 988 return -EINVAL; 989 990 if (pmu->default_config) { 991 memcpy(&attr, pmu->default_config, 992 sizeof(struct perf_event_attr)); 993 } else { 994 memset(&attr, 0, sizeof(attr)); 995 } 996 997 if (!head_config) { 998 attr.type = pmu->type; 999 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL); 1000 return evsel ? 0 : -ENOMEM; 1001 } 1002 1003 if (perf_pmu__check_alias(pmu, head_config, &info)) 1004 return -EINVAL; 1005 1006 /* 1007 * Configure hardcoded terms first, no need to check 1008 * return value when called with fail == 0 ;) 1009 */ 1010 if (config_attr(&attr, head_config, data->error, config_term_pmu)) 1011 return -EINVAL; 1012 1013 if (get_config_terms(head_config, &config_terms)) 1014 return -ENOMEM; 1015 1016 if (perf_pmu__config(pmu, &attr, head_config, data->error)) 1017 return -EINVAL; 1018 1019 evsel = __add_event(list, &data->idx, &attr, 1020 pmu_event_name(head_config), pmu->cpus, 1021 &config_terms); 1022 if (evsel) { 1023 evsel->unit = info.unit; 1024 evsel->scale = info.scale; 1025 evsel->per_pkg = info.per_pkg; 1026 evsel->snapshot = info.snapshot; 1027 } 1028 1029 return evsel ? 0 : -ENOMEM; 1030 } 1031 1032 int parse_events__modifier_group(struct list_head *list, 1033 char *event_mod) 1034 { 1035 return parse_events__modifier_event(list, event_mod, true); 1036 } 1037 1038 void parse_events__set_leader(char *name, struct list_head *list) 1039 { 1040 struct perf_evsel *leader; 1041 1042 if (list_empty(list)) { 1043 WARN_ONCE(true, "WARNING: failed to set leader: empty list"); 1044 return; 1045 } 1046 1047 __perf_evlist__set_leader(list); 1048 leader = list_entry(list->next, struct perf_evsel, node); 1049 leader->group_name = name ? strdup(name) : NULL; 1050 } 1051 1052 /* list_event is assumed to point to malloc'ed memory */ 1053 void parse_events_update_lists(struct list_head *list_event, 1054 struct list_head *list_all) 1055 { 1056 /* 1057 * Called for single event definition. Update the 1058 * 'all event' list, and reinit the 'single event' 1059 * list, for next event definition. 1060 */ 1061 list_splice_tail(list_event, list_all); 1062 free(list_event); 1063 } 1064 1065 struct event_modifier { 1066 int eu; 1067 int ek; 1068 int eh; 1069 int eH; 1070 int eG; 1071 int eI; 1072 int precise; 1073 int precise_max; 1074 int exclude_GH; 1075 int sample_read; 1076 int pinned; 1077 }; 1078 1079 static int get_event_modifier(struct event_modifier *mod, char *str, 1080 struct perf_evsel *evsel) 1081 { 1082 int eu = evsel ? evsel->attr.exclude_user : 0; 1083 int ek = evsel ? evsel->attr.exclude_kernel : 0; 1084 int eh = evsel ? evsel->attr.exclude_hv : 0; 1085 int eH = evsel ? evsel->attr.exclude_host : 0; 1086 int eG = evsel ? evsel->attr.exclude_guest : 0; 1087 int eI = evsel ? evsel->attr.exclude_idle : 0; 1088 int precise = evsel ? evsel->attr.precise_ip : 0; 1089 int precise_max = 0; 1090 int sample_read = 0; 1091 int pinned = evsel ? evsel->attr.pinned : 0; 1092 1093 int exclude = eu | ek | eh; 1094 int exclude_GH = evsel ? evsel->exclude_GH : 0; 1095 1096 memset(mod, 0, sizeof(*mod)); 1097 1098 while (*str) { 1099 if (*str == 'u') { 1100 if (!exclude) 1101 exclude = eu = ek = eh = 1; 1102 eu = 0; 1103 } else if (*str == 'k') { 1104 if (!exclude) 1105 exclude = eu = ek = eh = 1; 1106 ek = 0; 1107 } else if (*str == 'h') { 1108 if (!exclude) 1109 exclude = eu = ek = eh = 1; 1110 eh = 0; 1111 } else if (*str == 'G') { 1112 if (!exclude_GH) 1113 exclude_GH = eG = eH = 1; 1114 eG = 0; 1115 } else if (*str == 'H') { 1116 if (!exclude_GH) 1117 exclude_GH = eG = eH = 1; 1118 eH = 0; 1119 } else if (*str == 'I') { 1120 eI = 1; 1121 } else if (*str == 'p') { 1122 precise++; 1123 /* use of precise requires exclude_guest */ 1124 if (!exclude_GH) 1125 eG = 1; 1126 } else if (*str == 'P') { 1127 precise_max = 1; 1128 } else if (*str == 'S') { 1129 sample_read = 1; 1130 } else if (*str == 'D') { 1131 pinned = 1; 1132 } else 1133 break; 1134 1135 ++str; 1136 } 1137 1138 /* 1139 * precise ip: 1140 * 1141 * 0 - SAMPLE_IP can have arbitrary skid 1142 * 1 - SAMPLE_IP must have constant skid 1143 * 2 - SAMPLE_IP requested to have 0 skid 1144 * 3 - SAMPLE_IP must have 0 skid 1145 * 1146 * See also PERF_RECORD_MISC_EXACT_IP 1147 */ 1148 if (precise > 3) 1149 return -EINVAL; 1150 1151 mod->eu = eu; 1152 mod->ek = ek; 1153 mod->eh = eh; 1154 mod->eH = eH; 1155 mod->eG = eG; 1156 mod->eI = eI; 1157 mod->precise = precise; 1158 mod->precise_max = precise_max; 1159 mod->exclude_GH = exclude_GH; 1160 mod->sample_read = sample_read; 1161 mod->pinned = pinned; 1162 1163 return 0; 1164 } 1165 1166 /* 1167 * Basic modifier sanity check to validate it contains only one 1168 * instance of any modifier (apart from 'p') present. 1169 */ 1170 static int check_modifier(char *str) 1171 { 1172 char *p = str; 1173 1174 /* The sizeof includes 0 byte as well. */ 1175 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1)) 1176 return -1; 1177 1178 while (*p) { 1179 if (*p != 'p' && strchr(p + 1, *p)) 1180 return -1; 1181 p++; 1182 } 1183 1184 return 0; 1185 } 1186 1187 int parse_events__modifier_event(struct list_head *list, char *str, bool add) 1188 { 1189 struct perf_evsel *evsel; 1190 struct event_modifier mod; 1191 1192 if (str == NULL) 1193 return 0; 1194 1195 if (check_modifier(str)) 1196 return -EINVAL; 1197 1198 if (!add && get_event_modifier(&mod, str, NULL)) 1199 return -EINVAL; 1200 1201 __evlist__for_each(list, evsel) { 1202 if (add && get_event_modifier(&mod, str, evsel)) 1203 return -EINVAL; 1204 1205 evsel->attr.exclude_user = mod.eu; 1206 evsel->attr.exclude_kernel = mod.ek; 1207 evsel->attr.exclude_hv = mod.eh; 1208 evsel->attr.precise_ip = mod.precise; 1209 evsel->attr.exclude_host = mod.eH; 1210 evsel->attr.exclude_guest = mod.eG; 1211 evsel->attr.exclude_idle = mod.eI; 1212 evsel->exclude_GH = mod.exclude_GH; 1213 evsel->sample_read = mod.sample_read; 1214 evsel->precise_max = mod.precise_max; 1215 1216 if (perf_evsel__is_group_leader(evsel)) 1217 evsel->attr.pinned = mod.pinned; 1218 } 1219 1220 return 0; 1221 } 1222 1223 int parse_events_name(struct list_head *list, char *name) 1224 { 1225 struct perf_evsel *evsel; 1226 1227 __evlist__for_each(list, evsel) { 1228 if (!evsel->name) 1229 evsel->name = strdup(name); 1230 } 1231 1232 return 0; 1233 } 1234 1235 static int 1236 comp_pmu(const void *p1, const void *p2) 1237 { 1238 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; 1239 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; 1240 1241 return strcmp(pmu1->symbol, pmu2->symbol); 1242 } 1243 1244 static void perf_pmu__parse_cleanup(void) 1245 { 1246 if (perf_pmu_events_list_num > 0) { 1247 struct perf_pmu_event_symbol *p; 1248 int i; 1249 1250 for (i = 0; i < perf_pmu_events_list_num; i++) { 1251 p = perf_pmu_events_list + i; 1252 free(p->symbol); 1253 } 1254 free(perf_pmu_events_list); 1255 perf_pmu_events_list = NULL; 1256 perf_pmu_events_list_num = 0; 1257 } 1258 } 1259 1260 #define SET_SYMBOL(str, stype) \ 1261 do { \ 1262 p->symbol = str; \ 1263 if (!p->symbol) \ 1264 goto err; \ 1265 p->type = stype; \ 1266 } while (0) 1267 1268 /* 1269 * Read the pmu events list from sysfs 1270 * Save it into perf_pmu_events_list 1271 */ 1272 static void perf_pmu__parse_init(void) 1273 { 1274 1275 struct perf_pmu *pmu = NULL; 1276 struct perf_pmu_alias *alias; 1277 int len = 0; 1278 1279 pmu = perf_pmu__find("cpu"); 1280 if ((pmu == NULL) || list_empty(&pmu->aliases)) { 1281 perf_pmu_events_list_num = -1; 1282 return; 1283 } 1284 list_for_each_entry(alias, &pmu->aliases, list) { 1285 if (strchr(alias->name, '-')) 1286 len++; 1287 len++; 1288 } 1289 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); 1290 if (!perf_pmu_events_list) 1291 return; 1292 perf_pmu_events_list_num = len; 1293 1294 len = 0; 1295 list_for_each_entry(alias, &pmu->aliases, list) { 1296 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; 1297 char *tmp = strchr(alias->name, '-'); 1298 1299 if (tmp != NULL) { 1300 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 1301 PMU_EVENT_SYMBOL_PREFIX); 1302 p++; 1303 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); 1304 len += 2; 1305 } else { 1306 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); 1307 len++; 1308 } 1309 } 1310 qsort(perf_pmu_events_list, len, 1311 sizeof(struct perf_pmu_event_symbol), comp_pmu); 1312 1313 return; 1314 err: 1315 perf_pmu__parse_cleanup(); 1316 } 1317 1318 enum perf_pmu_event_symbol_type 1319 perf_pmu__parse_check(const char *name) 1320 { 1321 struct perf_pmu_event_symbol p, *r; 1322 1323 /* scan kernel pmu events from sysfs if needed */ 1324 if (perf_pmu_events_list_num == 0) 1325 perf_pmu__parse_init(); 1326 /* 1327 * name "cpu" could be prefix of cpu-cycles or cpu// events. 1328 * cpu-cycles has been handled by hardcode. 1329 * So it must be cpu// events, not kernel pmu event. 1330 */ 1331 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) 1332 return PMU_EVENT_SYMBOL_ERR; 1333 1334 p.symbol = strdup(name); 1335 r = bsearch(&p, perf_pmu_events_list, 1336 (size_t) perf_pmu_events_list_num, 1337 sizeof(struct perf_pmu_event_symbol), comp_pmu); 1338 free(p.symbol); 1339 return r ? r->type : PMU_EVENT_SYMBOL_ERR; 1340 } 1341 1342 static int parse_events__scanner(const char *str, void *data, int start_token) 1343 { 1344 YY_BUFFER_STATE buffer; 1345 void *scanner; 1346 int ret; 1347 1348 ret = parse_events_lex_init_extra(start_token, &scanner); 1349 if (ret) 1350 return ret; 1351 1352 buffer = parse_events__scan_string(str, scanner); 1353 1354 #ifdef PARSER_DEBUG 1355 parse_events_debug = 1; 1356 #endif 1357 ret = parse_events_parse(data, scanner); 1358 1359 parse_events__flush_buffer(buffer, scanner); 1360 parse_events__delete_buffer(buffer, scanner); 1361 parse_events_lex_destroy(scanner); 1362 return ret; 1363 } 1364 1365 /* 1366 * parse event config string, return a list of event terms. 1367 */ 1368 int parse_events_terms(struct list_head *terms, const char *str) 1369 { 1370 struct parse_events_terms data = { 1371 .terms = NULL, 1372 }; 1373 int ret; 1374 1375 ret = parse_events__scanner(str, &data, PE_START_TERMS); 1376 if (!ret) { 1377 list_splice(data.terms, terms); 1378 zfree(&data.terms); 1379 return 0; 1380 } 1381 1382 if (data.terms) 1383 parse_events__free_terms(data.terms); 1384 return ret; 1385 } 1386 1387 int parse_events(struct perf_evlist *evlist, const char *str, 1388 struct parse_events_error *err) 1389 { 1390 struct parse_events_evlist data = { 1391 .list = LIST_HEAD_INIT(data.list), 1392 .idx = evlist->nr_entries, 1393 .error = err, 1394 }; 1395 int ret; 1396 1397 ret = parse_events__scanner(str, &data, PE_START_EVENTS); 1398 perf_pmu__parse_cleanup(); 1399 if (!ret) { 1400 struct perf_evsel *last; 1401 1402 if (list_empty(&data.list)) { 1403 WARN_ONCE(true, "WARNING: event parser found nothing"); 1404 return -1; 1405 } 1406 1407 perf_evlist__splice_list_tail(evlist, &data.list); 1408 evlist->nr_groups += data.nr_groups; 1409 last = perf_evlist__last(evlist); 1410 last->cmdline_group_boundary = true; 1411 1412 return 0; 1413 } 1414 1415 /* 1416 * There are 2 users - builtin-record and builtin-test objects. 1417 * Both call perf_evlist__delete in case of error, so we dont 1418 * need to bother. 1419 */ 1420 return ret; 1421 } 1422 1423 #define MAX_WIDTH 1000 1424 static int get_term_width(void) 1425 { 1426 struct winsize ws; 1427 1428 get_term_dimensions(&ws); 1429 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; 1430 } 1431 1432 static void parse_events_print_error(struct parse_events_error *err, 1433 const char *event) 1434 { 1435 const char *str = "invalid or unsupported event: "; 1436 char _buf[MAX_WIDTH]; 1437 char *buf = (char *) event; 1438 int idx = 0; 1439 1440 if (err->str) { 1441 /* -2 for extra '' in the final fprintf */ 1442 int width = get_term_width() - 2; 1443 int len_event = strlen(event); 1444 int len_str, max_len, cut = 0; 1445 1446 /* 1447 * Maximum error index indent, we will cut 1448 * the event string if it's bigger. 1449 */ 1450 int max_err_idx = 13; 1451 1452 /* 1453 * Let's be specific with the message when 1454 * we have the precise error. 1455 */ 1456 str = "event syntax error: "; 1457 len_str = strlen(str); 1458 max_len = width - len_str; 1459 1460 buf = _buf; 1461 1462 /* We're cutting from the beggining. */ 1463 if (err->idx > max_err_idx) 1464 cut = err->idx - max_err_idx; 1465 1466 strncpy(buf, event + cut, max_len); 1467 1468 /* Mark cut parts with '..' on both sides. */ 1469 if (cut) 1470 buf[0] = buf[1] = '.'; 1471 1472 if ((len_event - cut) > max_len) { 1473 buf[max_len - 1] = buf[max_len - 2] = '.'; 1474 buf[max_len] = 0; 1475 } 1476 1477 idx = len_str + err->idx - cut; 1478 } 1479 1480 fprintf(stderr, "%s'%s'\n", str, buf); 1481 if (idx) { 1482 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str); 1483 if (err->help) 1484 fprintf(stderr, "\n%s\n", err->help); 1485 free(err->str); 1486 free(err->help); 1487 } 1488 1489 fprintf(stderr, "Run 'perf list' for a list of valid events\n"); 1490 } 1491 1492 #undef MAX_WIDTH 1493 1494 int parse_events_option(const struct option *opt, const char *str, 1495 int unset __maybe_unused) 1496 { 1497 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; 1498 struct parse_events_error err = { .idx = 0, }; 1499 int ret = parse_events(evlist, str, &err); 1500 1501 if (ret) 1502 parse_events_print_error(&err, str); 1503 1504 return ret; 1505 } 1506 1507 static int 1508 foreach_evsel_in_last_glob(struct perf_evlist *evlist, 1509 int (*func)(struct perf_evsel *evsel, 1510 const void *arg), 1511 const void *arg) 1512 { 1513 struct perf_evsel *last = NULL; 1514 int err; 1515 1516 /* 1517 * Don't return when list_empty, give func a chance to report 1518 * error when it found last == NULL. 1519 * 1520 * So no need to WARN here, let *func do this. 1521 */ 1522 if (evlist->nr_entries > 0) 1523 last = perf_evlist__last(evlist); 1524 1525 do { 1526 err = (*func)(last, arg); 1527 if (err) 1528 return -1; 1529 if (!last) 1530 return 0; 1531 1532 if (last->node.prev == &evlist->entries) 1533 return 0; 1534 last = list_entry(last->node.prev, struct perf_evsel, node); 1535 } while (!last->cmdline_group_boundary); 1536 1537 return 0; 1538 } 1539 1540 static int set_filter(struct perf_evsel *evsel, const void *arg) 1541 { 1542 const char *str = arg; 1543 1544 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) { 1545 fprintf(stderr, 1546 "--filter option should follow a -e tracepoint option\n"); 1547 return -1; 1548 } 1549 1550 if (perf_evsel__append_filter(evsel, "&&", str) < 0) { 1551 fprintf(stderr, 1552 "not enough memory to hold filter string\n"); 1553 return -1; 1554 } 1555 1556 return 0; 1557 } 1558 1559 int parse_filter(const struct option *opt, const char *str, 1560 int unset __maybe_unused) 1561 { 1562 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; 1563 1564 return foreach_evsel_in_last_glob(evlist, set_filter, 1565 (const void *)str); 1566 } 1567 1568 static int add_exclude_perf_filter(struct perf_evsel *evsel, 1569 const void *arg __maybe_unused) 1570 { 1571 char new_filter[64]; 1572 1573 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) { 1574 fprintf(stderr, 1575 "--exclude-perf option should follow a -e tracepoint option\n"); 1576 return -1; 1577 } 1578 1579 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid()); 1580 1581 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) { 1582 fprintf(stderr, 1583 "not enough memory to hold filter string\n"); 1584 return -1; 1585 } 1586 1587 return 0; 1588 } 1589 1590 int exclude_perf(const struct option *opt, 1591 const char *arg __maybe_unused, 1592 int unset __maybe_unused) 1593 { 1594 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; 1595 1596 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter, 1597 NULL); 1598 } 1599 1600 static const char * const event_type_descriptors[] = { 1601 "Hardware event", 1602 "Software event", 1603 "Tracepoint event", 1604 "Hardware cache event", 1605 "Raw hardware event descriptor", 1606 "Hardware breakpoint", 1607 }; 1608 1609 static int cmp_string(const void *a, const void *b) 1610 { 1611 const char * const *as = a; 1612 const char * const *bs = b; 1613 1614 return strcmp(*as, *bs); 1615 } 1616 1617 /* 1618 * Print the events from <debugfs_mount_point>/tracing/events 1619 */ 1620 1621 void print_tracepoint_events(const char *subsys_glob, const char *event_glob, 1622 bool name_only) 1623 { 1624 DIR *sys_dir, *evt_dir; 1625 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 1626 char evt_path[MAXPATHLEN]; 1627 char dir_path[MAXPATHLEN]; 1628 char **evt_list = NULL; 1629 unsigned int evt_i = 0, evt_num = 0; 1630 bool evt_num_known = false; 1631 1632 restart: 1633 sys_dir = opendir(tracing_events_path); 1634 if (!sys_dir) 1635 return; 1636 1637 if (evt_num_known) { 1638 evt_list = zalloc(sizeof(char *) * evt_num); 1639 if (!evt_list) 1640 goto out_close_sys_dir; 1641 } 1642 1643 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 1644 if (subsys_glob != NULL && 1645 !strglobmatch(sys_dirent.d_name, subsys_glob)) 1646 continue; 1647 1648 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 1649 sys_dirent.d_name); 1650 evt_dir = opendir(dir_path); 1651 if (!evt_dir) 1652 continue; 1653 1654 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 1655 if (event_glob != NULL && 1656 !strglobmatch(evt_dirent.d_name, event_glob)) 1657 continue; 1658 1659 if (!evt_num_known) { 1660 evt_num++; 1661 continue; 1662 } 1663 1664 snprintf(evt_path, MAXPATHLEN, "%s:%s", 1665 sys_dirent.d_name, evt_dirent.d_name); 1666 1667 evt_list[evt_i] = strdup(evt_path); 1668 if (evt_list[evt_i] == NULL) 1669 goto out_close_evt_dir; 1670 evt_i++; 1671 } 1672 closedir(evt_dir); 1673 } 1674 closedir(sys_dir); 1675 1676 if (!evt_num_known) { 1677 evt_num_known = true; 1678 goto restart; 1679 } 1680 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 1681 evt_i = 0; 1682 while (evt_i < evt_num) { 1683 if (name_only) { 1684 printf("%s ", evt_list[evt_i++]); 1685 continue; 1686 } 1687 printf(" %-50s [%s]\n", evt_list[evt_i++], 1688 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 1689 } 1690 if (evt_num && pager_in_use()) 1691 printf("\n"); 1692 1693 out_free: 1694 evt_num = evt_i; 1695 for (evt_i = 0; evt_i < evt_num; evt_i++) 1696 zfree(&evt_list[evt_i]); 1697 zfree(&evt_list); 1698 return; 1699 1700 out_close_evt_dir: 1701 closedir(evt_dir); 1702 out_close_sys_dir: 1703 closedir(sys_dir); 1704 1705 printf("FATAL: not enough memory to print %s\n", 1706 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 1707 if (evt_list) 1708 goto out_free; 1709 } 1710 1711 /* 1712 * Check whether event is in <debugfs_mount_point>/tracing/events 1713 */ 1714 1715 int is_valid_tracepoint(const char *event_string) 1716 { 1717 DIR *sys_dir, *evt_dir; 1718 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; 1719 char evt_path[MAXPATHLEN]; 1720 char dir_path[MAXPATHLEN]; 1721 1722 sys_dir = opendir(tracing_events_path); 1723 if (!sys_dir) 1724 return 0; 1725 1726 for_each_subsystem(sys_dir, sys_dirent, sys_next) { 1727 1728 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path, 1729 sys_dirent.d_name); 1730 evt_dir = opendir(dir_path); 1731 if (!evt_dir) 1732 continue; 1733 1734 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { 1735 snprintf(evt_path, MAXPATHLEN, "%s:%s", 1736 sys_dirent.d_name, evt_dirent.d_name); 1737 if (!strcmp(evt_path, event_string)) { 1738 closedir(evt_dir); 1739 closedir(sys_dir); 1740 return 1; 1741 } 1742 } 1743 closedir(evt_dir); 1744 } 1745 closedir(sys_dir); 1746 return 0; 1747 } 1748 1749 static bool is_event_supported(u8 type, unsigned config) 1750 { 1751 bool ret = true; 1752 int open_return; 1753 struct perf_evsel *evsel; 1754 struct perf_event_attr attr = { 1755 .type = type, 1756 .config = config, 1757 .disabled = 1, 1758 }; 1759 struct { 1760 struct thread_map map; 1761 int threads[1]; 1762 } tmap = { 1763 .map.nr = 1, 1764 .threads = { 0 }, 1765 }; 1766 1767 evsel = perf_evsel__new(&attr); 1768 if (evsel) { 1769 open_return = perf_evsel__open(evsel, NULL, &tmap.map); 1770 ret = open_return >= 0; 1771 1772 if (open_return == -EACCES) { 1773 /* 1774 * This happens if the paranoid value 1775 * /proc/sys/kernel/perf_event_paranoid is set to 2 1776 * Re-run with exclude_kernel set; we don't do that 1777 * by default as some ARM machines do not support it. 1778 * 1779 */ 1780 evsel->attr.exclude_kernel = 1; 1781 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0; 1782 } 1783 perf_evsel__delete(evsel); 1784 } 1785 1786 return ret; 1787 } 1788 1789 int print_hwcache_events(const char *event_glob, bool name_only) 1790 { 1791 unsigned int type, op, i, evt_i = 0, evt_num = 0; 1792 char name[64]; 1793 char **evt_list = NULL; 1794 bool evt_num_known = false; 1795 1796 restart: 1797 if (evt_num_known) { 1798 evt_list = zalloc(sizeof(char *) * evt_num); 1799 if (!evt_list) 1800 goto out_enomem; 1801 } 1802 1803 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 1804 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 1805 /* skip invalid cache type */ 1806 if (!perf_evsel__is_cache_op_valid(type, op)) 1807 continue; 1808 1809 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 1810 __perf_evsel__hw_cache_type_op_res_name(type, op, i, 1811 name, sizeof(name)); 1812 if (event_glob != NULL && !strglobmatch(name, event_glob)) 1813 continue; 1814 1815 if (!is_event_supported(PERF_TYPE_HW_CACHE, 1816 type | (op << 8) | (i << 16))) 1817 continue; 1818 1819 if (!evt_num_known) { 1820 evt_num++; 1821 continue; 1822 } 1823 1824 evt_list[evt_i] = strdup(name); 1825 if (evt_list[evt_i] == NULL) 1826 goto out_enomem; 1827 evt_i++; 1828 } 1829 } 1830 } 1831 1832 if (!evt_num_known) { 1833 evt_num_known = true; 1834 goto restart; 1835 } 1836 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 1837 evt_i = 0; 1838 while (evt_i < evt_num) { 1839 if (name_only) { 1840 printf("%s ", evt_list[evt_i++]); 1841 continue; 1842 } 1843 printf(" %-50s [%s]\n", evt_list[evt_i++], 1844 event_type_descriptors[PERF_TYPE_HW_CACHE]); 1845 } 1846 if (evt_num && pager_in_use()) 1847 printf("\n"); 1848 1849 out_free: 1850 evt_num = evt_i; 1851 for (evt_i = 0; evt_i < evt_num; evt_i++) 1852 zfree(&evt_list[evt_i]); 1853 zfree(&evt_list); 1854 return evt_num; 1855 1856 out_enomem: 1857 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]); 1858 if (evt_list) 1859 goto out_free; 1860 return evt_num; 1861 } 1862 1863 void print_symbol_events(const char *event_glob, unsigned type, 1864 struct event_symbol *syms, unsigned max, 1865 bool name_only) 1866 { 1867 unsigned int i, evt_i = 0, evt_num = 0; 1868 char name[MAX_NAME_LEN]; 1869 char **evt_list = NULL; 1870 bool evt_num_known = false; 1871 1872 restart: 1873 if (evt_num_known) { 1874 evt_list = zalloc(sizeof(char *) * evt_num); 1875 if (!evt_list) 1876 goto out_enomem; 1877 syms -= max; 1878 } 1879 1880 for (i = 0; i < max; i++, syms++) { 1881 1882 if (event_glob != NULL && 1883 !(strglobmatch(syms->symbol, event_glob) || 1884 (syms->alias && strglobmatch(syms->alias, event_glob)))) 1885 continue; 1886 1887 if (!is_event_supported(type, i)) 1888 continue; 1889 1890 if (!evt_num_known) { 1891 evt_num++; 1892 continue; 1893 } 1894 1895 if (!name_only && strlen(syms->alias)) 1896 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); 1897 else 1898 strncpy(name, syms->symbol, MAX_NAME_LEN); 1899 1900 evt_list[evt_i] = strdup(name); 1901 if (evt_list[evt_i] == NULL) 1902 goto out_enomem; 1903 evt_i++; 1904 } 1905 1906 if (!evt_num_known) { 1907 evt_num_known = true; 1908 goto restart; 1909 } 1910 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 1911 evt_i = 0; 1912 while (evt_i < evt_num) { 1913 if (name_only) { 1914 printf("%s ", evt_list[evt_i++]); 1915 continue; 1916 } 1917 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]); 1918 } 1919 if (evt_num && pager_in_use()) 1920 printf("\n"); 1921 1922 out_free: 1923 evt_num = evt_i; 1924 for (evt_i = 0; evt_i < evt_num; evt_i++) 1925 zfree(&evt_list[evt_i]); 1926 zfree(&evt_list); 1927 return; 1928 1929 out_enomem: 1930 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]); 1931 if (evt_list) 1932 goto out_free; 1933 } 1934 1935 /* 1936 * Print the help text for the event symbols: 1937 */ 1938 void print_events(const char *event_glob, bool name_only) 1939 { 1940 print_symbol_events(event_glob, PERF_TYPE_HARDWARE, 1941 event_symbols_hw, PERF_COUNT_HW_MAX, name_only); 1942 1943 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE, 1944 event_symbols_sw, PERF_COUNT_SW_MAX, name_only); 1945 1946 print_hwcache_events(event_glob, name_only); 1947 1948 print_pmu_events(event_glob, name_only); 1949 1950 if (event_glob != NULL) 1951 return; 1952 1953 if (!name_only) { 1954 printf(" %-50s [%s]\n", 1955 "rNNN", 1956 event_type_descriptors[PERF_TYPE_RAW]); 1957 printf(" %-50s [%s]\n", 1958 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 1959 event_type_descriptors[PERF_TYPE_RAW]); 1960 if (pager_in_use()) 1961 printf(" (see 'man perf-list' on how to encode it)\n\n"); 1962 1963 printf(" %-50s [%s]\n", 1964 "mem:<addr>[/len][:access]", 1965 event_type_descriptors[PERF_TYPE_BREAKPOINT]); 1966 if (pager_in_use()) 1967 printf("\n"); 1968 } 1969 1970 print_tracepoint_events(NULL, NULL, name_only); 1971 } 1972 1973 int parse_events__is_hardcoded_term(struct parse_events_term *term) 1974 { 1975 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; 1976 } 1977 1978 static int new_term(struct parse_events_term **_term, int type_val, 1979 int type_term, char *config, 1980 char *str, u64 num, int err_term, int err_val) 1981 { 1982 struct parse_events_term *term; 1983 1984 term = zalloc(sizeof(*term)); 1985 if (!term) 1986 return -ENOMEM; 1987 1988 INIT_LIST_HEAD(&term->list); 1989 term->type_val = type_val; 1990 term->type_term = type_term; 1991 term->config = config; 1992 term->err_term = err_term; 1993 term->err_val = err_val; 1994 1995 switch (type_val) { 1996 case PARSE_EVENTS__TERM_TYPE_NUM: 1997 term->val.num = num; 1998 break; 1999 case PARSE_EVENTS__TERM_TYPE_STR: 2000 term->val.str = str; 2001 break; 2002 default: 2003 free(term); 2004 return -EINVAL; 2005 } 2006 2007 *_term = term; 2008 return 0; 2009 } 2010 2011 int parse_events_term__num(struct parse_events_term **term, 2012 int type_term, char *config, u64 num, 2013 void *loc_term_, void *loc_val_) 2014 { 2015 YYLTYPE *loc_term = loc_term_; 2016 YYLTYPE *loc_val = loc_val_; 2017 2018 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term, 2019 config, NULL, num, 2020 loc_term ? loc_term->first_column : 0, 2021 loc_val ? loc_val->first_column : 0); 2022 } 2023 2024 int parse_events_term__str(struct parse_events_term **term, 2025 int type_term, char *config, char *str, 2026 void *loc_term_, void *loc_val_) 2027 { 2028 YYLTYPE *loc_term = loc_term_; 2029 YYLTYPE *loc_val = loc_val_; 2030 2031 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term, 2032 config, str, 0, 2033 loc_term ? loc_term->first_column : 0, 2034 loc_val ? loc_val->first_column : 0); 2035 } 2036 2037 int parse_events_term__sym_hw(struct parse_events_term **term, 2038 char *config, unsigned idx) 2039 { 2040 struct event_symbol *sym; 2041 2042 BUG_ON(idx >= PERF_COUNT_HW_MAX); 2043 sym = &event_symbols_hw[idx]; 2044 2045 if (config) 2046 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, 2047 PARSE_EVENTS__TERM_TYPE_USER, config, 2048 (char *) sym->symbol, 0, 0, 0); 2049 else 2050 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, 2051 PARSE_EVENTS__TERM_TYPE_USER, 2052 (char *) "event", (char *) sym->symbol, 2053 0, 0, 0); 2054 } 2055 2056 int parse_events_term__clone(struct parse_events_term **new, 2057 struct parse_events_term *term) 2058 { 2059 return new_term(new, term->type_val, term->type_term, term->config, 2060 term->val.str, term->val.num, 2061 term->err_term, term->err_val); 2062 } 2063 2064 void parse_events__free_terms(struct list_head *terms) 2065 { 2066 struct parse_events_term *term, *h; 2067 2068 list_for_each_entry_safe(term, h, terms, list) 2069 free(term); 2070 } 2071 2072 void parse_events_evlist_error(struct parse_events_evlist *data, 2073 int idx, const char *str) 2074 { 2075 struct parse_events_error *err = data->error; 2076 2077 if (!err) 2078 return; 2079 err->idx = idx; 2080 err->str = strdup(str); 2081 WARN_ONCE(!err->str, "WARNING: failed to allocate error string"); 2082 } 2083 2084 /* 2085 * Return string contains valid config terms of an event. 2086 * @additional_terms: For terms such as PMU sysfs terms. 2087 */ 2088 char *parse_events_formats_error_string(char *additional_terms) 2089 { 2090 char *str; 2091 static const char *static_terms = "config,config1,config2,name," 2092 "period,freq,branch_type,time," 2093 "call-graph,stack-size\n"; 2094 2095 /* valid terms */ 2096 if (additional_terms) { 2097 if (!asprintf(&str, "valid terms: %s,%s", 2098 additional_terms, static_terms)) 2099 goto fail; 2100 } else { 2101 if (!asprintf(&str, "valid terms: %s", static_terms)) 2102 goto fail; 2103 } 2104 return str; 2105 2106 fail: 2107 return NULL; 2108 } 2109