1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/hw_breakpoint.h> 3 #include <linux/err.h> 4 #include <linux/zalloc.h> 5 #include <dirent.h> 6 #include <errno.h> 7 #include <sys/ioctl.h> 8 #include <sys/types.h> 9 #include <sys/stat.h> 10 #include <fcntl.h> 11 #include <sys/param.h> 12 #include "term.h" 13 #include "build-id.h" 14 #include "evlist.h" 15 #include "evsel.h" 16 #include <subcmd/pager.h> 17 #include <subcmd/parse-options.h> 18 #include "parse-events.h" 19 #include <subcmd/exec-cmd.h> 20 #include "string2.h" 21 #include "strlist.h" 22 #include "symbol.h" 23 #include "header.h" 24 #include "bpf-loader.h" 25 #include "debug.h" 26 #include <api/fs/tracing_path.h> 27 #include <perf/cpumap.h> 28 #include "parse-events-bison.h" 29 #define YY_EXTRA_TYPE void* 30 #include "parse-events-flex.h" 31 #include "pmu.h" 32 #include "thread_map.h" 33 #include "probe-file.h" 34 #include "asm/bug.h" 35 #include "util/parse-branch-options.h" 36 #include "metricgroup.h" 37 #include "util/evsel_config.h" 38 #include "util/event.h" 39 #include "util/pfm.h" 40 #include "perf.h" 41 42 #define MAX_NAME_LEN 100 43 44 #ifdef PARSER_DEBUG 45 extern int parse_events_debug; 46 #endif 47 int parse_events_parse(void *parse_state, void *scanner); 48 static int get_config_terms(struct list_head *head_config, 49 struct list_head *head_terms __maybe_unused); 50 51 static struct perf_pmu_event_symbol *perf_pmu_events_list; 52 /* 53 * The variable indicates the number of supported pmu event symbols. 54 * 0 means not initialized and ready to init 55 * -1 means failed to init, don't try anymore 56 * >0 is the number of supported pmu event symbols 57 */ 58 static int perf_pmu_events_list_num; 59 60 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { 61 [PERF_COUNT_HW_CPU_CYCLES] = { 62 .symbol = "cpu-cycles", 63 .alias = "cycles", 64 }, 65 [PERF_COUNT_HW_INSTRUCTIONS] = { 66 .symbol = "instructions", 67 .alias = "", 68 }, 69 [PERF_COUNT_HW_CACHE_REFERENCES] = { 70 .symbol = "cache-references", 71 .alias = "", 72 }, 73 [PERF_COUNT_HW_CACHE_MISSES] = { 74 .symbol = "cache-misses", 75 .alias = "", 76 }, 77 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 78 .symbol = "branch-instructions", 79 .alias = "branches", 80 }, 81 [PERF_COUNT_HW_BRANCH_MISSES] = { 82 .symbol = "branch-misses", 83 .alias = "", 84 }, 85 [PERF_COUNT_HW_BUS_CYCLES] = { 86 .symbol = "bus-cycles", 87 .alias = "", 88 }, 89 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { 90 .symbol = "stalled-cycles-frontend", 91 .alias = "idle-cycles-frontend", 92 }, 93 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { 94 .symbol = "stalled-cycles-backend", 95 .alias = "idle-cycles-backend", 96 }, 97 [PERF_COUNT_HW_REF_CPU_CYCLES] = { 98 .symbol = "ref-cycles", 99 .alias = "", 100 }, 101 }; 102 103 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { 104 [PERF_COUNT_SW_CPU_CLOCK] = { 105 .symbol = "cpu-clock", 106 .alias = "", 107 }, 108 [PERF_COUNT_SW_TASK_CLOCK] = { 109 .symbol = "task-clock", 110 .alias = "", 111 }, 112 [PERF_COUNT_SW_PAGE_FAULTS] = { 113 .symbol = "page-faults", 114 .alias = "faults", 115 }, 116 [PERF_COUNT_SW_CONTEXT_SWITCHES] = { 117 .symbol = "context-switches", 118 .alias = "cs", 119 }, 120 [PERF_COUNT_SW_CPU_MIGRATIONS] = { 121 .symbol = "cpu-migrations", 122 .alias = "migrations", 123 }, 124 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { 125 .symbol = "minor-faults", 126 .alias = "", 127 }, 128 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { 129 .symbol = "major-faults", 130 .alias = "", 131 }, 132 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { 133 .symbol = "alignment-faults", 134 .alias = "", 135 }, 136 [PERF_COUNT_SW_EMULATION_FAULTS] = { 137 .symbol = "emulation-faults", 138 .alias = "", 139 }, 140 [PERF_COUNT_SW_DUMMY] = { 141 .symbol = "dummy", 142 .alias = "", 143 }, 144 [PERF_COUNT_SW_BPF_OUTPUT] = { 145 .symbol = "bpf-output", 146 .alias = "", 147 }, 148 }; 149 150 #define __PERF_EVENT_FIELD(config, name) \ 151 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT) 152 153 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW) 154 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG) 155 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE) 156 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT) 157 158 #define for_each_subsystem(sys_dir, sys_dirent) \ 159 while ((sys_dirent = readdir(sys_dir)) != NULL) \ 160 if (sys_dirent->d_type == DT_DIR && \ 161 (strcmp(sys_dirent->d_name, ".")) && \ 162 (strcmp(sys_dirent->d_name, ".."))) 163 164 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir) 165 { 166 char evt_path[MAXPATHLEN]; 167 int fd; 168 169 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name); 170 fd = open(evt_path, O_RDONLY); 171 if (fd < 0) 172 return -EINVAL; 173 close(fd); 174 175 return 0; 176 } 177 178 #define for_each_event(dir_path, evt_dir, evt_dirent) \ 179 while ((evt_dirent = readdir(evt_dir)) != NULL) \ 180 if (evt_dirent->d_type == DT_DIR && \ 181 (strcmp(evt_dirent->d_name, ".")) && \ 182 (strcmp(evt_dirent->d_name, "..")) && \ 183 (!tp_event_has_id(dir_path, evt_dirent))) 184 185 #define MAX_EVENT_LENGTH 512 186 187 void parse_events__handle_error(struct parse_events_error *err, int idx, 188 char *str, char *help) 189 { 190 if (WARN(!str, "WARNING: failed to provide error string\n")) { 191 free(help); 192 return; 193 } 194 switch (err->num_errors) { 195 case 0: 196 err->idx = idx; 197 err->str = str; 198 err->help = help; 199 break; 200 case 1: 201 err->first_idx = err->idx; 202 err->idx = idx; 203 err->first_str = err->str; 204 err->str = str; 205 err->first_help = err->help; 206 err->help = help; 207 break; 208 default: 209 pr_debug("Multiple errors dropping message: %s (%s)\n", 210 err->str, err->help); 211 free(err->str); 212 err->str = str; 213 free(err->help); 214 err->help = help; 215 break; 216 } 217 err->num_errors++; 218 } 219 220 struct tracepoint_path *tracepoint_id_to_path(u64 config) 221 { 222 struct tracepoint_path *path = NULL; 223 DIR *sys_dir, *evt_dir; 224 struct dirent *sys_dirent, *evt_dirent; 225 char id_buf[24]; 226 int fd; 227 u64 id; 228 char evt_path[MAXPATHLEN]; 229 char *dir_path; 230 231 sys_dir = tracing_events__opendir(); 232 if (!sys_dir) 233 return NULL; 234 235 for_each_subsystem(sys_dir, sys_dirent) { 236 dir_path = get_events_file(sys_dirent->d_name); 237 if (!dir_path) 238 continue; 239 evt_dir = opendir(dir_path); 240 if (!evt_dir) 241 goto next; 242 243 for_each_event(dir_path, evt_dir, evt_dirent) { 244 245 scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, 246 evt_dirent->d_name); 247 fd = open(evt_path, O_RDONLY); 248 if (fd < 0) 249 continue; 250 if (read(fd, id_buf, sizeof(id_buf)) < 0) { 251 close(fd); 252 continue; 253 } 254 close(fd); 255 id = atoll(id_buf); 256 if (id == config) { 257 put_events_file(dir_path); 258 closedir(evt_dir); 259 closedir(sys_dir); 260 path = zalloc(sizeof(*path)); 261 if (!path) 262 return NULL; 263 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) { 264 free(path); 265 return NULL; 266 } 267 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) { 268 zfree(&path->system); 269 free(path); 270 return NULL; 271 } 272 return path; 273 } 274 } 275 closedir(evt_dir); 276 next: 277 put_events_file(dir_path); 278 } 279 280 closedir(sys_dir); 281 return NULL; 282 } 283 284 struct tracepoint_path *tracepoint_name_to_path(const char *name) 285 { 286 struct tracepoint_path *path = zalloc(sizeof(*path)); 287 char *str = strchr(name, ':'); 288 289 if (path == NULL || str == NULL) { 290 free(path); 291 return NULL; 292 } 293 294 path->system = strndup(name, str - name); 295 path->name = strdup(str+1); 296 297 if (path->system == NULL || path->name == NULL) { 298 zfree(&path->system); 299 zfree(&path->name); 300 zfree(&path); 301 } 302 303 return path; 304 } 305 306 const char *event_type(int type) 307 { 308 switch (type) { 309 case PERF_TYPE_HARDWARE: 310 return "hardware"; 311 312 case PERF_TYPE_SOFTWARE: 313 return "software"; 314 315 case PERF_TYPE_TRACEPOINT: 316 return "tracepoint"; 317 318 case PERF_TYPE_HW_CACHE: 319 return "hardware-cache"; 320 321 default: 322 break; 323 } 324 325 return "unknown"; 326 } 327 328 static int parse_events__is_name_term(struct parse_events_term *term) 329 { 330 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME; 331 } 332 333 static char *get_config_name(struct list_head *head_terms) 334 { 335 struct parse_events_term *term; 336 337 if (!head_terms) 338 return NULL; 339 340 list_for_each_entry(term, head_terms, list) 341 if (parse_events__is_name_term(term)) 342 return term->val.str; 343 344 return NULL; 345 } 346 347 static struct evsel * 348 __add_event(struct list_head *list, int *idx, 349 struct perf_event_attr *attr, 350 bool init_attr, 351 char *name, struct perf_pmu *pmu, 352 struct list_head *config_terms, bool auto_merge_stats, 353 const char *cpu_list) 354 { 355 struct evsel *evsel; 356 struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) : 357 cpu_list ? perf_cpu_map__new(cpu_list) : NULL; 358 359 if (init_attr) 360 event_attr_init(attr); 361 362 evsel = evsel__new_idx(attr, *idx); 363 if (!evsel) { 364 perf_cpu_map__put(cpus); 365 return NULL; 366 } 367 368 (*idx)++; 369 evsel->core.cpus = cpus; 370 evsel->core.own_cpus = perf_cpu_map__get(cpus); 371 evsel->core.system_wide = pmu ? pmu->is_uncore : false; 372 evsel->auto_merge_stats = auto_merge_stats; 373 374 if (name) 375 evsel->name = strdup(name); 376 377 if (config_terms) 378 list_splice(config_terms, &evsel->config_terms); 379 380 if (list) 381 list_add_tail(&evsel->core.node, list); 382 383 return evsel; 384 } 385 386 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr, 387 char *name, struct perf_pmu *pmu) 388 { 389 return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false, 390 NULL); 391 } 392 393 static int add_event(struct list_head *list, int *idx, 394 struct perf_event_attr *attr, char *name, 395 struct list_head *config_terms) 396 { 397 return __add_event(list, idx, attr, true, name, NULL, config_terms, 398 false, NULL) ? 0 : -ENOMEM; 399 } 400 401 static int add_event_tool(struct list_head *list, int *idx, 402 enum perf_tool_event tool_event) 403 { 404 struct evsel *evsel; 405 struct perf_event_attr attr = { 406 .type = PERF_TYPE_SOFTWARE, 407 .config = PERF_COUNT_SW_DUMMY, 408 }; 409 410 evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false, 411 "0"); 412 if (!evsel) 413 return -ENOMEM; 414 evsel->tool_event = tool_event; 415 if (tool_event == PERF_TOOL_DURATION_TIME) 416 evsel->unit = "ns"; 417 return 0; 418 } 419 420 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size) 421 { 422 int i, j; 423 int n, longest = -1; 424 425 for (i = 0; i < size; i++) { 426 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) { 427 n = strlen(names[i][j]); 428 if (n > longest && !strncasecmp(str, names[i][j], n)) 429 longest = n; 430 } 431 if (longest > 0) 432 return i; 433 } 434 435 return -1; 436 } 437 438 typedef int config_term_func_t(struct perf_event_attr *attr, 439 struct parse_events_term *term, 440 struct parse_events_error *err); 441 static int config_term_common(struct perf_event_attr *attr, 442 struct parse_events_term *term, 443 struct parse_events_error *err); 444 static int config_attr(struct perf_event_attr *attr, 445 struct list_head *head, 446 struct parse_events_error *err, 447 config_term_func_t config_term); 448 449 int parse_events_add_cache(struct list_head *list, int *idx, 450 char *type, char *op_result1, char *op_result2, 451 struct parse_events_error *err, 452 struct list_head *head_config) 453 { 454 struct perf_event_attr attr; 455 LIST_HEAD(config_terms); 456 char name[MAX_NAME_LEN], *config_name; 457 int cache_type = -1, cache_op = -1, cache_result = -1; 458 char *op_result[2] = { op_result1, op_result2 }; 459 int i, n; 460 461 /* 462 * No fallback - if we cannot get a clear cache type 463 * then bail out: 464 */ 465 cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX); 466 if (cache_type == -1) 467 return -EINVAL; 468 469 config_name = get_config_name(head_config); 470 n = snprintf(name, MAX_NAME_LEN, "%s", type); 471 472 for (i = 0; (i < 2) && (op_result[i]); i++) { 473 char *str = op_result[i]; 474 475 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); 476 477 if (cache_op == -1) { 478 cache_op = parse_aliases(str, evsel__hw_cache_op, 479 PERF_COUNT_HW_CACHE_OP_MAX); 480 if (cache_op >= 0) { 481 if (!evsel__is_cache_op_valid(cache_type, cache_op)) 482 return -EINVAL; 483 continue; 484 } 485 } 486 487 if (cache_result == -1) { 488 cache_result = parse_aliases(str, evsel__hw_cache_result, 489 PERF_COUNT_HW_CACHE_RESULT_MAX); 490 if (cache_result >= 0) 491 continue; 492 } 493 } 494 495 /* 496 * Fall back to reads: 497 */ 498 if (cache_op == -1) 499 cache_op = PERF_COUNT_HW_CACHE_OP_READ; 500 501 /* 502 * Fall back to accesses: 503 */ 504 if (cache_result == -1) 505 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; 506 507 memset(&attr, 0, sizeof(attr)); 508 attr.config = cache_type | (cache_op << 8) | (cache_result << 16); 509 attr.type = PERF_TYPE_HW_CACHE; 510 511 if (head_config) { 512 if (config_attr(&attr, head_config, err, 513 config_term_common)) 514 return -EINVAL; 515 516 if (get_config_terms(head_config, &config_terms)) 517 return -ENOMEM; 518 } 519 return add_event(list, idx, &attr, config_name ? : name, &config_terms); 520 } 521 522 static void tracepoint_error(struct parse_events_error *e, int err, 523 const char *sys, const char *name) 524 { 525 const char *str; 526 char help[BUFSIZ]; 527 528 if (!e) 529 return; 530 531 /* 532 * We get error directly from syscall errno ( > 0), 533 * or from encoded pointer's error ( < 0). 534 */ 535 err = abs(err); 536 537 switch (err) { 538 case EACCES: 539 str = "can't access trace events"; 540 break; 541 case ENOENT: 542 str = "unknown tracepoint"; 543 break; 544 default: 545 str = "failed to add tracepoint"; 546 break; 547 } 548 549 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); 550 parse_events__handle_error(e, 0, strdup(str), strdup(help)); 551 } 552 553 static int add_tracepoint(struct list_head *list, int *idx, 554 const char *sys_name, const char *evt_name, 555 struct parse_events_error *err, 556 struct list_head *head_config) 557 { 558 struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++); 559 560 if (IS_ERR(evsel)) { 561 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name); 562 return PTR_ERR(evsel); 563 } 564 565 if (head_config) { 566 LIST_HEAD(config_terms); 567 568 if (get_config_terms(head_config, &config_terms)) 569 return -ENOMEM; 570 list_splice(&config_terms, &evsel->config_terms); 571 } 572 573 list_add_tail(&evsel->core.node, list); 574 return 0; 575 } 576 577 static int add_tracepoint_multi_event(struct list_head *list, int *idx, 578 const char *sys_name, const char *evt_name, 579 struct parse_events_error *err, 580 struct list_head *head_config) 581 { 582 char *evt_path; 583 struct dirent *evt_ent; 584 DIR *evt_dir; 585 int ret = 0, found = 0; 586 587 evt_path = get_events_file(sys_name); 588 if (!evt_path) { 589 tracepoint_error(err, errno, sys_name, evt_name); 590 return -1; 591 } 592 evt_dir = opendir(evt_path); 593 if (!evt_dir) { 594 put_events_file(evt_path); 595 tracepoint_error(err, errno, sys_name, evt_name); 596 return -1; 597 } 598 599 while (!ret && (evt_ent = readdir(evt_dir))) { 600 if (!strcmp(evt_ent->d_name, ".") 601 || !strcmp(evt_ent->d_name, "..") 602 || !strcmp(evt_ent->d_name, "enable") 603 || !strcmp(evt_ent->d_name, "filter")) 604 continue; 605 606 if (!strglobmatch(evt_ent->d_name, evt_name)) 607 continue; 608 609 found++; 610 611 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, 612 err, head_config); 613 } 614 615 if (!found) { 616 tracepoint_error(err, ENOENT, sys_name, evt_name); 617 ret = -1; 618 } 619 620 put_events_file(evt_path); 621 closedir(evt_dir); 622 return ret; 623 } 624 625 static int add_tracepoint_event(struct list_head *list, int *idx, 626 const char *sys_name, const char *evt_name, 627 struct parse_events_error *err, 628 struct list_head *head_config) 629 { 630 return strpbrk(evt_name, "*?") ? 631 add_tracepoint_multi_event(list, idx, sys_name, evt_name, 632 err, head_config) : 633 add_tracepoint(list, idx, sys_name, evt_name, 634 err, head_config); 635 } 636 637 static int add_tracepoint_multi_sys(struct list_head *list, int *idx, 638 const char *sys_name, const char *evt_name, 639 struct parse_events_error *err, 640 struct list_head *head_config) 641 { 642 struct dirent *events_ent; 643 DIR *events_dir; 644 int ret = 0; 645 646 events_dir = tracing_events__opendir(); 647 if (!events_dir) { 648 tracepoint_error(err, errno, sys_name, evt_name); 649 return -1; 650 } 651 652 while (!ret && (events_ent = readdir(events_dir))) { 653 if (!strcmp(events_ent->d_name, ".") 654 || !strcmp(events_ent->d_name, "..") 655 || !strcmp(events_ent->d_name, "enable") 656 || !strcmp(events_ent->d_name, "header_event") 657 || !strcmp(events_ent->d_name, "header_page")) 658 continue; 659 660 if (!strglobmatch(events_ent->d_name, sys_name)) 661 continue; 662 663 ret = add_tracepoint_event(list, idx, events_ent->d_name, 664 evt_name, err, head_config); 665 } 666 667 closedir(events_dir); 668 return ret; 669 } 670 671 #ifdef HAVE_LIBBPF_SUPPORT 672 struct __add_bpf_event_param { 673 struct parse_events_state *parse_state; 674 struct list_head *list; 675 struct list_head *head_config; 676 }; 677 678 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj, 679 void *_param) 680 { 681 LIST_HEAD(new_evsels); 682 struct __add_bpf_event_param *param = _param; 683 struct parse_events_state *parse_state = param->parse_state; 684 struct list_head *list = param->list; 685 struct evsel *pos; 686 int err; 687 /* 688 * Check if we should add the event, i.e. if it is a TP but starts with a '!', 689 * then don't add the tracepoint, this will be used for something else, like 690 * adding to a BPF_MAP_TYPE_PROG_ARRAY. 691 * 692 * See tools/perf/examples/bpf/augmented_raw_syscalls.c 693 */ 694 if (group[0] == '!') 695 return 0; 696 697 pr_debug("add bpf event %s:%s and attach bpf program %d\n", 698 group, event, fd); 699 700 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group, 701 event, parse_state->error, 702 param->head_config); 703 if (err) { 704 struct evsel *evsel, *tmp; 705 706 pr_debug("Failed to add BPF event %s:%s\n", 707 group, event); 708 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) { 709 list_del_init(&evsel->core.node); 710 evsel__delete(evsel); 711 } 712 return err; 713 } 714 pr_debug("adding %s:%s\n", group, event); 715 716 list_for_each_entry(pos, &new_evsels, core.node) { 717 pr_debug("adding %s:%s to %p\n", 718 group, event, pos); 719 pos->bpf_fd = fd; 720 pos->bpf_obj = obj; 721 } 722 list_splice(&new_evsels, list); 723 return 0; 724 } 725 726 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 727 struct list_head *list, 728 struct bpf_object *obj, 729 struct list_head *head_config) 730 { 731 int err; 732 char errbuf[BUFSIZ]; 733 struct __add_bpf_event_param param = {parse_state, list, head_config}; 734 static bool registered_unprobe_atexit = false; 735 736 if (IS_ERR(obj) || !obj) { 737 snprintf(errbuf, sizeof(errbuf), 738 "Internal error: load bpf obj with NULL"); 739 err = -EINVAL; 740 goto errout; 741 } 742 743 /* 744 * Register atexit handler before calling bpf__probe() so 745 * bpf__probe() don't need to unprobe probe points its already 746 * created when failure. 747 */ 748 if (!registered_unprobe_atexit) { 749 atexit(bpf__clear); 750 registered_unprobe_atexit = true; 751 } 752 753 err = bpf__probe(obj); 754 if (err) { 755 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf)); 756 goto errout; 757 } 758 759 err = bpf__load(obj); 760 if (err) { 761 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf)); 762 goto errout; 763 } 764 765 err = bpf__foreach_event(obj, add_bpf_event, ¶m); 766 if (err) { 767 snprintf(errbuf, sizeof(errbuf), 768 "Attach events in BPF object failed"); 769 goto errout; 770 } 771 772 return 0; 773 errout: 774 parse_events__handle_error(parse_state->error, 0, 775 strdup(errbuf), strdup("(add -v to see detail)")); 776 return err; 777 } 778 779 static int 780 parse_events_config_bpf(struct parse_events_state *parse_state, 781 struct bpf_object *obj, 782 struct list_head *head_config) 783 { 784 struct parse_events_term *term; 785 int error_pos; 786 787 if (!head_config || list_empty(head_config)) 788 return 0; 789 790 list_for_each_entry(term, head_config, list) { 791 int err; 792 793 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) { 794 parse_events__handle_error(parse_state->error, term->err_term, 795 strdup("Invalid config term for BPF object"), 796 NULL); 797 return -EINVAL; 798 } 799 800 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos); 801 if (err) { 802 char errbuf[BUFSIZ]; 803 int idx; 804 805 bpf__strerror_config_obj(obj, term, parse_state->evlist, 806 &error_pos, err, errbuf, 807 sizeof(errbuf)); 808 809 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE) 810 idx = term->err_val; 811 else 812 idx = term->err_term + error_pos; 813 814 parse_events__handle_error(parse_state->error, idx, 815 strdup(errbuf), 816 strdup( 817 "Hint:\tValid config terms:\n" 818 " \tmap:[<arraymap>].value<indices>=[value]\n" 819 " \tmap:[<eventmap>].event<indices>=[event]\n" 820 "\n" 821 " \twhere <indices> is something like [0,3...5] or [all]\n" 822 " \t(add -v to see detail)")); 823 return err; 824 } 825 } 826 return 0; 827 } 828 829 /* 830 * Split config terms: 831 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ... 832 * 'call-graph=fp' is 'evt config', should be applied to each 833 * events in bpf.c. 834 * 'map:array.value[0]=1' is 'obj config', should be processed 835 * with parse_events_config_bpf. 836 * 837 * Move object config terms from the first list to obj_head_config. 838 */ 839 static void 840 split_bpf_config_terms(struct list_head *evt_head_config, 841 struct list_head *obj_head_config) 842 { 843 struct parse_events_term *term, *temp; 844 845 /* 846 * Currectly, all possible user config term 847 * belong to bpf object. parse_events__is_hardcoded_term() 848 * happends to be a good flag. 849 * 850 * See parse_events_config_bpf() and 851 * config_term_tracepoint(). 852 */ 853 list_for_each_entry_safe(term, temp, evt_head_config, list) 854 if (!parse_events__is_hardcoded_term(term)) 855 list_move_tail(&term->list, obj_head_config); 856 } 857 858 int parse_events_load_bpf(struct parse_events_state *parse_state, 859 struct list_head *list, 860 char *bpf_file_name, 861 bool source, 862 struct list_head *head_config) 863 { 864 int err; 865 struct bpf_object *obj; 866 LIST_HEAD(obj_head_config); 867 868 if (head_config) 869 split_bpf_config_terms(head_config, &obj_head_config); 870 871 obj = bpf__prepare_load(bpf_file_name, source); 872 if (IS_ERR(obj)) { 873 char errbuf[BUFSIZ]; 874 875 err = PTR_ERR(obj); 876 877 if (err == -ENOTSUP) 878 snprintf(errbuf, sizeof(errbuf), 879 "BPF support is not compiled"); 880 else 881 bpf__strerror_prepare_load(bpf_file_name, 882 source, 883 -err, errbuf, 884 sizeof(errbuf)); 885 886 parse_events__handle_error(parse_state->error, 0, 887 strdup(errbuf), strdup("(add -v to see detail)")); 888 return err; 889 } 890 891 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config); 892 if (err) 893 return err; 894 err = parse_events_config_bpf(parse_state, obj, &obj_head_config); 895 896 /* 897 * Caller doesn't know anything about obj_head_config, 898 * so combine them together again before returnning. 899 */ 900 if (head_config) 901 list_splice_tail(&obj_head_config, head_config); 902 return err; 903 } 904 #else // HAVE_LIBBPF_SUPPORT 905 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 906 struct list_head *list __maybe_unused, 907 struct bpf_object *obj __maybe_unused, 908 struct list_head *head_config __maybe_unused) 909 { 910 parse_events__handle_error(parse_state->error, 0, 911 strdup("BPF support is not compiled"), 912 strdup("Make sure libbpf-devel is available at build time.")); 913 return -ENOTSUP; 914 } 915 916 int parse_events_load_bpf(struct parse_events_state *parse_state, 917 struct list_head *list __maybe_unused, 918 char *bpf_file_name __maybe_unused, 919 bool source __maybe_unused, 920 struct list_head *head_config __maybe_unused) 921 { 922 parse_events__handle_error(parse_state->error, 0, 923 strdup("BPF support is not compiled"), 924 strdup("Make sure libbpf-devel is available at build time.")); 925 return -ENOTSUP; 926 } 927 #endif // HAVE_LIBBPF_SUPPORT 928 929 static int 930 parse_breakpoint_type(const char *type, struct perf_event_attr *attr) 931 { 932 int i; 933 934 for (i = 0; i < 3; i++) { 935 if (!type || !type[i]) 936 break; 937 938 #define CHECK_SET_TYPE(bit) \ 939 do { \ 940 if (attr->bp_type & bit) \ 941 return -EINVAL; \ 942 else \ 943 attr->bp_type |= bit; \ 944 } while (0) 945 946 switch (type[i]) { 947 case 'r': 948 CHECK_SET_TYPE(HW_BREAKPOINT_R); 949 break; 950 case 'w': 951 CHECK_SET_TYPE(HW_BREAKPOINT_W); 952 break; 953 case 'x': 954 CHECK_SET_TYPE(HW_BREAKPOINT_X); 955 break; 956 default: 957 return -EINVAL; 958 } 959 } 960 961 #undef CHECK_SET_TYPE 962 963 if (!attr->bp_type) /* Default */ 964 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; 965 966 return 0; 967 } 968 969 int parse_events_add_breakpoint(struct list_head *list, int *idx, 970 u64 addr, char *type, u64 len) 971 { 972 struct perf_event_attr attr; 973 974 memset(&attr, 0, sizeof(attr)); 975 attr.bp_addr = addr; 976 977 if (parse_breakpoint_type(type, &attr)) 978 return -EINVAL; 979 980 /* Provide some defaults if len is not specified */ 981 if (!len) { 982 if (attr.bp_type == HW_BREAKPOINT_X) 983 len = sizeof(long); 984 else 985 len = HW_BREAKPOINT_LEN_4; 986 } 987 988 attr.bp_len = len; 989 990 attr.type = PERF_TYPE_BREAKPOINT; 991 attr.sample_period = 1; 992 993 return add_event(list, idx, &attr, NULL, NULL); 994 } 995 996 static int check_type_val(struct parse_events_term *term, 997 struct parse_events_error *err, 998 int type) 999 { 1000 if (type == term->type_val) 1001 return 0; 1002 1003 if (err) { 1004 parse_events__handle_error(err, term->err_val, 1005 type == PARSE_EVENTS__TERM_TYPE_NUM 1006 ? strdup("expected numeric value") 1007 : strdup("expected string value"), 1008 NULL); 1009 } 1010 return -EINVAL; 1011 } 1012 1013 /* 1014 * Update according to parse-events.l 1015 */ 1016 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = { 1017 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>", 1018 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config", 1019 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1", 1020 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2", 1021 [PARSE_EVENTS__TERM_TYPE_NAME] = "name", 1022 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period", 1023 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq", 1024 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type", 1025 [PARSE_EVENTS__TERM_TYPE_TIME] = "time", 1026 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph", 1027 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size", 1028 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit", 1029 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit", 1030 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack", 1031 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr", 1032 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite", 1033 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite", 1034 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config", 1035 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore", 1036 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output", 1037 [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size", 1038 }; 1039 1040 static bool config_term_shrinked; 1041 1042 static bool 1043 config_term_avail(int term_type, struct parse_events_error *err) 1044 { 1045 char *err_str; 1046 1047 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { 1048 parse_events__handle_error(err, -1, 1049 strdup("Invalid term_type"), NULL); 1050 return false; 1051 } 1052 if (!config_term_shrinked) 1053 return true; 1054 1055 switch (term_type) { 1056 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1057 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 1058 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 1059 case PARSE_EVENTS__TERM_TYPE_NAME: 1060 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1061 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1062 return true; 1063 default: 1064 if (!err) 1065 return false; 1066 1067 /* term_type is validated so indexing is safe */ 1068 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'", 1069 config_term_names[term_type]) >= 0) 1070 parse_events__handle_error(err, -1, err_str, NULL); 1071 return false; 1072 } 1073 } 1074 1075 void parse_events__shrink_config_terms(void) 1076 { 1077 config_term_shrinked = true; 1078 } 1079 1080 static int config_term_common(struct perf_event_attr *attr, 1081 struct parse_events_term *term, 1082 struct parse_events_error *err) 1083 { 1084 #define CHECK_TYPE_VAL(type) \ 1085 do { \ 1086 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \ 1087 return -EINVAL; \ 1088 } while (0) 1089 1090 switch (term->type_term) { 1091 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1092 CHECK_TYPE_VAL(NUM); 1093 attr->config = term->val.num; 1094 break; 1095 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 1096 CHECK_TYPE_VAL(NUM); 1097 attr->config1 = term->val.num; 1098 break; 1099 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 1100 CHECK_TYPE_VAL(NUM); 1101 attr->config2 = term->val.num; 1102 break; 1103 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1104 CHECK_TYPE_VAL(NUM); 1105 break; 1106 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1107 CHECK_TYPE_VAL(NUM); 1108 break; 1109 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1110 CHECK_TYPE_VAL(STR); 1111 if (strcmp(term->val.str, "no") && 1112 parse_branch_str(term->val.str, 1113 &attr->branch_sample_type)) { 1114 parse_events__handle_error(err, term->err_val, 1115 strdup("invalid branch sample type"), 1116 NULL); 1117 return -EINVAL; 1118 } 1119 break; 1120 case PARSE_EVENTS__TERM_TYPE_TIME: 1121 CHECK_TYPE_VAL(NUM); 1122 if (term->val.num > 1) { 1123 parse_events__handle_error(err, term->err_val, 1124 strdup("expected 0 or 1"), 1125 NULL); 1126 return -EINVAL; 1127 } 1128 break; 1129 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1130 CHECK_TYPE_VAL(STR); 1131 break; 1132 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1133 CHECK_TYPE_VAL(NUM); 1134 break; 1135 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1136 CHECK_TYPE_VAL(NUM); 1137 break; 1138 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1139 CHECK_TYPE_VAL(NUM); 1140 break; 1141 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1142 CHECK_TYPE_VAL(NUM); 1143 break; 1144 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1145 CHECK_TYPE_VAL(NUM); 1146 break; 1147 case PARSE_EVENTS__TERM_TYPE_NAME: 1148 CHECK_TYPE_VAL(STR); 1149 break; 1150 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1151 CHECK_TYPE_VAL(NUM); 1152 break; 1153 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1154 CHECK_TYPE_VAL(NUM); 1155 break; 1156 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1157 CHECK_TYPE_VAL(NUM); 1158 if ((unsigned int)term->val.num > 1) { 1159 parse_events__handle_error(err, term->err_val, 1160 strdup("expected 0 or 1"), 1161 NULL); 1162 return -EINVAL; 1163 } 1164 break; 1165 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1166 CHECK_TYPE_VAL(NUM); 1167 break; 1168 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1169 CHECK_TYPE_VAL(NUM); 1170 if (term->val.num > UINT_MAX) { 1171 parse_events__handle_error(err, term->err_val, 1172 strdup("too big"), 1173 NULL); 1174 return -EINVAL; 1175 } 1176 break; 1177 default: 1178 parse_events__handle_error(err, term->err_term, 1179 strdup("unknown term"), 1180 parse_events_formats_error_string(NULL)); 1181 return -EINVAL; 1182 } 1183 1184 /* 1185 * Check term availbility after basic checking so 1186 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered. 1187 * 1188 * If check availbility at the entry of this function, 1189 * user will see "'<sysfs term>' is not usable in 'perf stat'" 1190 * if an invalid config term is provided for legacy events 1191 * (for example, instructions/badterm/...), which is confusing. 1192 */ 1193 if (!config_term_avail(term->type_term, err)) 1194 return -EINVAL; 1195 return 0; 1196 #undef CHECK_TYPE_VAL 1197 } 1198 1199 static int config_term_pmu(struct perf_event_attr *attr, 1200 struct parse_events_term *term, 1201 struct parse_events_error *err) 1202 { 1203 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER || 1204 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG) 1205 /* 1206 * Always succeed for sysfs terms, as we dont know 1207 * at this point what type they need to have. 1208 */ 1209 return 0; 1210 else 1211 return config_term_common(attr, term, err); 1212 } 1213 1214 static int config_term_tracepoint(struct perf_event_attr *attr, 1215 struct parse_events_term *term, 1216 struct parse_events_error *err) 1217 { 1218 switch (term->type_term) { 1219 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1220 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1221 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1222 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1223 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1224 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1225 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1226 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1227 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1228 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1229 return config_term_common(attr, term, err); 1230 default: 1231 if (err) { 1232 parse_events__handle_error(err, term->err_term, 1233 strdup("unknown term"), 1234 strdup("valid terms: call-graph,stack-size\n")); 1235 } 1236 return -EINVAL; 1237 } 1238 1239 return 0; 1240 } 1241 1242 static int config_attr(struct perf_event_attr *attr, 1243 struct list_head *head, 1244 struct parse_events_error *err, 1245 config_term_func_t config_term) 1246 { 1247 struct parse_events_term *term; 1248 1249 list_for_each_entry(term, head, list) 1250 if (config_term(attr, term, err)) 1251 return -EINVAL; 1252 1253 return 0; 1254 } 1255 1256 static int get_config_terms(struct list_head *head_config, 1257 struct list_head *head_terms __maybe_unused) 1258 { 1259 #define ADD_CONFIG_TERM(__type, __weak) \ 1260 struct evsel_config_term *__t; \ 1261 \ 1262 __t = zalloc(sizeof(*__t)); \ 1263 if (!__t) \ 1264 return -ENOMEM; \ 1265 \ 1266 INIT_LIST_HEAD(&__t->list); \ 1267 __t->type = EVSEL__CONFIG_TERM_ ## __type; \ 1268 __t->weak = __weak; \ 1269 list_add_tail(&__t->list, head_terms) 1270 1271 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \ 1272 do { \ 1273 ADD_CONFIG_TERM(__type, __weak); \ 1274 __t->val.__name = __val; \ 1275 } while (0) 1276 1277 #define ADD_CONFIG_TERM_STR(__type, __val, __weak) \ 1278 do { \ 1279 ADD_CONFIG_TERM(__type, __weak); \ 1280 __t->val.str = strdup(__val); \ 1281 if (!__t->val.str) { \ 1282 zfree(&__t); \ 1283 return -ENOMEM; \ 1284 } \ 1285 __t->free_str = true; \ 1286 } while (0) 1287 1288 struct parse_events_term *term; 1289 1290 list_for_each_entry(term, head_config, list) { 1291 switch (term->type_term) { 1292 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1293 ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak); 1294 break; 1295 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1296 ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak); 1297 break; 1298 case PARSE_EVENTS__TERM_TYPE_TIME: 1299 ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak); 1300 break; 1301 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1302 ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak); 1303 break; 1304 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1305 ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak); 1306 break; 1307 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1308 ADD_CONFIG_TERM_VAL(STACK_USER, stack_user, 1309 term->val.num, term->weak); 1310 break; 1311 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1312 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1313 term->val.num ? 1 : 0, term->weak); 1314 break; 1315 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1316 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1317 term->val.num ? 0 : 1, term->weak); 1318 break; 1319 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1320 ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack, 1321 term->val.num, term->weak); 1322 break; 1323 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1324 ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events, 1325 term->val.num, term->weak); 1326 break; 1327 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1328 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1329 term->val.num ? 1 : 0, term->weak); 1330 break; 1331 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1332 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1333 term->val.num ? 0 : 1, term->weak); 1334 break; 1335 case PARSE_EVENTS__TERM_TYPE_DRV_CFG: 1336 ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak); 1337 break; 1338 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1339 ADD_CONFIG_TERM_VAL(PERCORE, percore, 1340 term->val.num ? true : false, term->weak); 1341 break; 1342 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1343 ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output, 1344 term->val.num ? 1 : 0, term->weak); 1345 break; 1346 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1347 ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size, 1348 term->val.num, term->weak); 1349 break; 1350 default: 1351 break; 1352 } 1353 } 1354 return 0; 1355 } 1356 1357 /* 1358 * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for 1359 * each bit of attr->config that the user has changed. 1360 */ 1361 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config, 1362 struct list_head *head_terms) 1363 { 1364 struct parse_events_term *term; 1365 u64 bits = 0; 1366 int type; 1367 1368 list_for_each_entry(term, head_config, list) { 1369 switch (term->type_term) { 1370 case PARSE_EVENTS__TERM_TYPE_USER: 1371 type = perf_pmu__format_type(&pmu->format, term->config); 1372 if (type != PERF_PMU_FORMAT_VALUE_CONFIG) 1373 continue; 1374 bits |= perf_pmu__format_bits(&pmu->format, term->config); 1375 break; 1376 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1377 bits = ~(u64)0; 1378 break; 1379 default: 1380 break; 1381 } 1382 } 1383 1384 if (bits) 1385 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false); 1386 1387 #undef ADD_CONFIG_TERM 1388 return 0; 1389 } 1390 1391 int parse_events_add_tracepoint(struct list_head *list, int *idx, 1392 const char *sys, const char *event, 1393 struct parse_events_error *err, 1394 struct list_head *head_config) 1395 { 1396 if (head_config) { 1397 struct perf_event_attr attr; 1398 1399 if (config_attr(&attr, head_config, err, 1400 config_term_tracepoint)) 1401 return -EINVAL; 1402 } 1403 1404 if (strpbrk(sys, "*?")) 1405 return add_tracepoint_multi_sys(list, idx, sys, event, 1406 err, head_config); 1407 else 1408 return add_tracepoint_event(list, idx, sys, event, 1409 err, head_config); 1410 } 1411 1412 int parse_events_add_numeric(struct parse_events_state *parse_state, 1413 struct list_head *list, 1414 u32 type, u64 config, 1415 struct list_head *head_config) 1416 { 1417 struct perf_event_attr attr; 1418 LIST_HEAD(config_terms); 1419 1420 memset(&attr, 0, sizeof(attr)); 1421 attr.type = type; 1422 attr.config = config; 1423 1424 if (head_config) { 1425 if (config_attr(&attr, head_config, parse_state->error, 1426 config_term_common)) 1427 return -EINVAL; 1428 1429 if (get_config_terms(head_config, &config_terms)) 1430 return -ENOMEM; 1431 } 1432 1433 return add_event(list, &parse_state->idx, &attr, 1434 get_config_name(head_config), &config_terms); 1435 } 1436 1437 int parse_events_add_tool(struct parse_events_state *parse_state, 1438 struct list_head *list, 1439 enum perf_tool_event tool_event) 1440 { 1441 return add_event_tool(list, &parse_state->idx, tool_event); 1442 } 1443 1444 static bool config_term_percore(struct list_head *config_terms) 1445 { 1446 struct evsel_config_term *term; 1447 1448 list_for_each_entry(term, config_terms, list) { 1449 if (term->type == EVSEL__CONFIG_TERM_PERCORE) 1450 return term->val.percore; 1451 } 1452 1453 return false; 1454 } 1455 1456 int parse_events_add_pmu(struct parse_events_state *parse_state, 1457 struct list_head *list, char *name, 1458 struct list_head *head_config, 1459 bool auto_merge_stats, 1460 bool use_alias) 1461 { 1462 struct perf_event_attr attr; 1463 struct perf_pmu_info info; 1464 struct perf_pmu *pmu; 1465 struct evsel *evsel; 1466 struct parse_events_error *err = parse_state->error; 1467 bool use_uncore_alias; 1468 LIST_HEAD(config_terms); 1469 1470 if (verbose > 1) { 1471 fprintf(stderr, "Attempting to add event pmu '%s' with '", 1472 name); 1473 if (head_config) { 1474 struct parse_events_term *term; 1475 1476 list_for_each_entry(term, head_config, list) { 1477 fprintf(stderr, "%s,", term->config); 1478 } 1479 } 1480 fprintf(stderr, "' that may result in non-fatal errors\n"); 1481 } 1482 1483 pmu = parse_state->fake_pmu ?: perf_pmu__find(name); 1484 if (!pmu) { 1485 char *err_str; 1486 1487 if (asprintf(&err_str, 1488 "Cannot find PMU `%s'. Missing kernel support?", 1489 name) >= 0) 1490 parse_events__handle_error(err, 0, err_str, NULL); 1491 return -EINVAL; 1492 } 1493 1494 if (pmu->default_config) { 1495 memcpy(&attr, pmu->default_config, 1496 sizeof(struct perf_event_attr)); 1497 } else { 1498 memset(&attr, 0, sizeof(attr)); 1499 } 1500 1501 use_uncore_alias = (pmu->is_uncore && use_alias); 1502 1503 if (!head_config) { 1504 attr.type = pmu->type; 1505 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL, 1506 pmu, NULL, auto_merge_stats, NULL); 1507 if (evsel) { 1508 evsel->pmu_name = name ? strdup(name) : NULL; 1509 evsel->use_uncore_alias = use_uncore_alias; 1510 return 0; 1511 } else { 1512 return -ENOMEM; 1513 } 1514 } 1515 1516 if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info)) 1517 return -EINVAL; 1518 1519 if (verbose > 1) { 1520 fprintf(stderr, "After aliases, add event pmu '%s' with '", 1521 name); 1522 if (head_config) { 1523 struct parse_events_term *term; 1524 1525 list_for_each_entry(term, head_config, list) { 1526 fprintf(stderr, "%s,", term->config); 1527 } 1528 } 1529 fprintf(stderr, "' that may result in non-fatal errors\n"); 1530 } 1531 1532 /* 1533 * Configure hardcoded terms first, no need to check 1534 * return value when called with fail == 0 ;) 1535 */ 1536 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu)) 1537 return -EINVAL; 1538 1539 if (get_config_terms(head_config, &config_terms)) 1540 return -ENOMEM; 1541 1542 /* 1543 * When using default config, record which bits of attr->config were 1544 * changed by the user. 1545 */ 1546 if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms)) 1547 return -ENOMEM; 1548 1549 if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) { 1550 struct evsel_config_term *pos, *tmp; 1551 1552 list_for_each_entry_safe(pos, tmp, &config_terms, list) { 1553 list_del_init(&pos->list); 1554 if (pos->free_str) 1555 zfree(&pos->val.str); 1556 free(pos); 1557 } 1558 return -EINVAL; 1559 } 1560 1561 evsel = __add_event(list, &parse_state->idx, &attr, true, 1562 get_config_name(head_config), pmu, 1563 &config_terms, auto_merge_stats, NULL); 1564 if (!evsel) 1565 return -ENOMEM; 1566 1567 evsel->pmu_name = name ? strdup(name) : NULL; 1568 evsel->use_uncore_alias = use_uncore_alias; 1569 evsel->percore = config_term_percore(&evsel->config_terms); 1570 1571 if (parse_state->fake_pmu) 1572 return 0; 1573 1574 evsel->unit = info.unit; 1575 evsel->scale = info.scale; 1576 evsel->per_pkg = info.per_pkg; 1577 evsel->snapshot = info.snapshot; 1578 evsel->metric_expr = info.metric_expr; 1579 evsel->metric_name = info.metric_name; 1580 return 0; 1581 } 1582 1583 int parse_events_multi_pmu_add(struct parse_events_state *parse_state, 1584 char *str, struct list_head **listp) 1585 { 1586 struct parse_events_term *term; 1587 struct list_head *list; 1588 struct perf_pmu *pmu = NULL; 1589 int ok = 0; 1590 1591 *listp = NULL; 1592 /* Add it for all PMUs that support the alias */ 1593 list = malloc(sizeof(struct list_head)); 1594 if (!list) 1595 return -1; 1596 INIT_LIST_HEAD(list); 1597 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1598 struct perf_pmu_alias *alias; 1599 1600 list_for_each_entry(alias, &pmu->aliases, list) { 1601 if (!strcasecmp(alias->name, str)) { 1602 struct list_head *head; 1603 char *config; 1604 1605 head = malloc(sizeof(struct list_head)); 1606 if (!head) 1607 return -1; 1608 INIT_LIST_HEAD(head); 1609 config = strdup(str); 1610 if (!config) 1611 return -1; 1612 if (parse_events_term__num(&term, 1613 PARSE_EVENTS__TERM_TYPE_USER, 1614 config, 1, false, &config, 1615 NULL) < 0) { 1616 free(list); 1617 free(config); 1618 return -1; 1619 } 1620 list_add_tail(&term->list, head); 1621 1622 if (!parse_events_add_pmu(parse_state, list, 1623 pmu->name, head, 1624 true, true)) { 1625 pr_debug("%s -> %s/%s/\n", str, 1626 pmu->name, alias->str); 1627 ok++; 1628 } 1629 1630 parse_events_terms__delete(head); 1631 } 1632 } 1633 } 1634 if (!ok) { 1635 free(list); 1636 return -1; 1637 } 1638 *listp = list; 1639 return 0; 1640 } 1641 1642 int parse_events__modifier_group(struct list_head *list, 1643 char *event_mod) 1644 { 1645 return parse_events__modifier_event(list, event_mod, true); 1646 } 1647 1648 /* 1649 * Check if the two uncore PMUs are from the same uncore block 1650 * The format of the uncore PMU name is uncore_#blockname_#pmuidx 1651 */ 1652 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b) 1653 { 1654 char *end_a, *end_b; 1655 1656 end_a = strrchr(pmu_name_a, '_'); 1657 end_b = strrchr(pmu_name_b, '_'); 1658 1659 if (!end_a || !end_b) 1660 return false; 1661 1662 if ((end_a - pmu_name_a) != (end_b - pmu_name_b)) 1663 return false; 1664 1665 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0); 1666 } 1667 1668 static int 1669 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list, 1670 struct parse_events_state *parse_state) 1671 { 1672 struct evsel *evsel, *leader; 1673 uintptr_t *leaders; 1674 bool is_leader = true; 1675 int i, nr_pmu = 0, total_members, ret = 0; 1676 1677 leader = list_first_entry(list, struct evsel, core.node); 1678 evsel = list_last_entry(list, struct evsel, core.node); 1679 total_members = evsel->idx - leader->idx + 1; 1680 1681 leaders = calloc(total_members, sizeof(uintptr_t)); 1682 if (WARN_ON(!leaders)) 1683 return 0; 1684 1685 /* 1686 * Going through the whole group and doing sanity check. 1687 * All members must use alias, and be from the same uncore block. 1688 * Also, storing the leader events in an array. 1689 */ 1690 __evlist__for_each_entry(list, evsel) { 1691 1692 /* Only split the uncore group which members use alias */ 1693 if (!evsel->use_uncore_alias) 1694 goto out; 1695 1696 /* The events must be from the same uncore block */ 1697 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name)) 1698 goto out; 1699 1700 if (!is_leader) 1701 continue; 1702 /* 1703 * If the event's PMU name starts to repeat, it must be a new 1704 * event. That can be used to distinguish the leader from 1705 * other members, even they have the same event name. 1706 */ 1707 if ((leader != evsel) && 1708 !strcmp(leader->pmu_name, evsel->pmu_name)) { 1709 is_leader = false; 1710 continue; 1711 } 1712 1713 /* Store the leader event for each PMU */ 1714 leaders[nr_pmu++] = (uintptr_t) evsel; 1715 } 1716 1717 /* only one event alias */ 1718 if (nr_pmu == total_members) { 1719 parse_state->nr_groups--; 1720 goto handled; 1721 } 1722 1723 /* 1724 * An uncore event alias is a joint name which means the same event 1725 * runs on all PMUs of a block. 1726 * Perf doesn't support mixed events from different PMUs in the same 1727 * group. The big group has to be split into multiple small groups 1728 * which only include the events from the same PMU. 1729 * 1730 * Here the uncore event aliases must be from the same uncore block. 1731 * The number of PMUs must be same for each alias. The number of new 1732 * small groups equals to the number of PMUs. 1733 * Setting the leader event for corresponding members in each group. 1734 */ 1735 i = 0; 1736 __evlist__for_each_entry(list, evsel) { 1737 if (i >= nr_pmu) 1738 i = 0; 1739 evsel->leader = (struct evsel *) leaders[i++]; 1740 } 1741 1742 /* The number of members and group name are same for each group */ 1743 for (i = 0; i < nr_pmu; i++) { 1744 evsel = (struct evsel *) leaders[i]; 1745 evsel->core.nr_members = total_members / nr_pmu; 1746 evsel->group_name = name ? strdup(name) : NULL; 1747 } 1748 1749 /* Take the new small groups into account */ 1750 parse_state->nr_groups += nr_pmu - 1; 1751 1752 handled: 1753 ret = 1; 1754 out: 1755 free(leaders); 1756 return ret; 1757 } 1758 1759 void parse_events__set_leader(char *name, struct list_head *list, 1760 struct parse_events_state *parse_state) 1761 { 1762 struct evsel *leader; 1763 1764 if (list_empty(list)) { 1765 WARN_ONCE(true, "WARNING: failed to set leader: empty list"); 1766 return; 1767 } 1768 1769 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) 1770 return; 1771 1772 __evlist__set_leader(list); 1773 leader = list_entry(list->next, struct evsel, core.node); 1774 leader->group_name = name ? strdup(name) : NULL; 1775 } 1776 1777 /* list_event is assumed to point to malloc'ed memory */ 1778 void parse_events_update_lists(struct list_head *list_event, 1779 struct list_head *list_all) 1780 { 1781 /* 1782 * Called for single event definition. Update the 1783 * 'all event' list, and reinit the 'single event' 1784 * list, for next event definition. 1785 */ 1786 list_splice_tail(list_event, list_all); 1787 free(list_event); 1788 } 1789 1790 struct event_modifier { 1791 int eu; 1792 int ek; 1793 int eh; 1794 int eH; 1795 int eG; 1796 int eI; 1797 int precise; 1798 int precise_max; 1799 int exclude_GH; 1800 int sample_read; 1801 int pinned; 1802 int weak; 1803 int exclusive; 1804 }; 1805 1806 static int get_event_modifier(struct event_modifier *mod, char *str, 1807 struct evsel *evsel) 1808 { 1809 int eu = evsel ? evsel->core.attr.exclude_user : 0; 1810 int ek = evsel ? evsel->core.attr.exclude_kernel : 0; 1811 int eh = evsel ? evsel->core.attr.exclude_hv : 0; 1812 int eH = evsel ? evsel->core.attr.exclude_host : 0; 1813 int eG = evsel ? evsel->core.attr.exclude_guest : 0; 1814 int eI = evsel ? evsel->core.attr.exclude_idle : 0; 1815 int precise = evsel ? evsel->core.attr.precise_ip : 0; 1816 int precise_max = 0; 1817 int sample_read = 0; 1818 int pinned = evsel ? evsel->core.attr.pinned : 0; 1819 int exclusive = evsel ? evsel->core.attr.exclusive : 0; 1820 1821 int exclude = eu | ek | eh; 1822 int exclude_GH = evsel ? evsel->exclude_GH : 0; 1823 int weak = 0; 1824 1825 memset(mod, 0, sizeof(*mod)); 1826 1827 while (*str) { 1828 if (*str == 'u') { 1829 if (!exclude) 1830 exclude = eu = ek = eh = 1; 1831 if (!exclude_GH && !perf_guest) 1832 eG = 1; 1833 eu = 0; 1834 } else if (*str == 'k') { 1835 if (!exclude) 1836 exclude = eu = ek = eh = 1; 1837 ek = 0; 1838 } else if (*str == 'h') { 1839 if (!exclude) 1840 exclude = eu = ek = eh = 1; 1841 eh = 0; 1842 } else if (*str == 'G') { 1843 if (!exclude_GH) 1844 exclude_GH = eG = eH = 1; 1845 eG = 0; 1846 } else if (*str == 'H') { 1847 if (!exclude_GH) 1848 exclude_GH = eG = eH = 1; 1849 eH = 0; 1850 } else if (*str == 'I') { 1851 eI = 1; 1852 } else if (*str == 'p') { 1853 precise++; 1854 /* use of precise requires exclude_guest */ 1855 if (!exclude_GH) 1856 eG = 1; 1857 } else if (*str == 'P') { 1858 precise_max = 1; 1859 } else if (*str == 'S') { 1860 sample_read = 1; 1861 } else if (*str == 'D') { 1862 pinned = 1; 1863 } else if (*str == 'e') { 1864 exclusive = 1; 1865 } else if (*str == 'W') { 1866 weak = 1; 1867 } else 1868 break; 1869 1870 ++str; 1871 } 1872 1873 /* 1874 * precise ip: 1875 * 1876 * 0 - SAMPLE_IP can have arbitrary skid 1877 * 1 - SAMPLE_IP must have constant skid 1878 * 2 - SAMPLE_IP requested to have 0 skid 1879 * 3 - SAMPLE_IP must have 0 skid 1880 * 1881 * See also PERF_RECORD_MISC_EXACT_IP 1882 */ 1883 if (precise > 3) 1884 return -EINVAL; 1885 1886 mod->eu = eu; 1887 mod->ek = ek; 1888 mod->eh = eh; 1889 mod->eH = eH; 1890 mod->eG = eG; 1891 mod->eI = eI; 1892 mod->precise = precise; 1893 mod->precise_max = precise_max; 1894 mod->exclude_GH = exclude_GH; 1895 mod->sample_read = sample_read; 1896 mod->pinned = pinned; 1897 mod->weak = weak; 1898 mod->exclusive = exclusive; 1899 1900 return 0; 1901 } 1902 1903 /* 1904 * Basic modifier sanity check to validate it contains only one 1905 * instance of any modifier (apart from 'p') present. 1906 */ 1907 static int check_modifier(char *str) 1908 { 1909 char *p = str; 1910 1911 /* The sizeof includes 0 byte as well. */ 1912 if (strlen(str) > (sizeof("ukhGHpppPSDIWe") - 1)) 1913 return -1; 1914 1915 while (*p) { 1916 if (*p != 'p' && strchr(p + 1, *p)) 1917 return -1; 1918 p++; 1919 } 1920 1921 return 0; 1922 } 1923 1924 int parse_events__modifier_event(struct list_head *list, char *str, bool add) 1925 { 1926 struct evsel *evsel; 1927 struct event_modifier mod; 1928 1929 if (str == NULL) 1930 return 0; 1931 1932 if (check_modifier(str)) 1933 return -EINVAL; 1934 1935 if (!add && get_event_modifier(&mod, str, NULL)) 1936 return -EINVAL; 1937 1938 __evlist__for_each_entry(list, evsel) { 1939 if (add && get_event_modifier(&mod, str, evsel)) 1940 return -EINVAL; 1941 1942 evsel->core.attr.exclude_user = mod.eu; 1943 evsel->core.attr.exclude_kernel = mod.ek; 1944 evsel->core.attr.exclude_hv = mod.eh; 1945 evsel->core.attr.precise_ip = mod.precise; 1946 evsel->core.attr.exclude_host = mod.eH; 1947 evsel->core.attr.exclude_guest = mod.eG; 1948 evsel->core.attr.exclude_idle = mod.eI; 1949 evsel->exclude_GH = mod.exclude_GH; 1950 evsel->sample_read = mod.sample_read; 1951 evsel->precise_max = mod.precise_max; 1952 evsel->weak_group = mod.weak; 1953 1954 if (evsel__is_group_leader(evsel)) { 1955 evsel->core.attr.pinned = mod.pinned; 1956 evsel->core.attr.exclusive = mod.exclusive; 1957 } 1958 } 1959 1960 return 0; 1961 } 1962 1963 int parse_events_name(struct list_head *list, char *name) 1964 { 1965 struct evsel *evsel; 1966 1967 __evlist__for_each_entry(list, evsel) { 1968 if (!evsel->name) 1969 evsel->name = strdup(name); 1970 } 1971 1972 return 0; 1973 } 1974 1975 static int 1976 comp_pmu(const void *p1, const void *p2) 1977 { 1978 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; 1979 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; 1980 1981 return strcasecmp(pmu1->symbol, pmu2->symbol); 1982 } 1983 1984 static void perf_pmu__parse_cleanup(void) 1985 { 1986 if (perf_pmu_events_list_num > 0) { 1987 struct perf_pmu_event_symbol *p; 1988 int i; 1989 1990 for (i = 0; i < perf_pmu_events_list_num; i++) { 1991 p = perf_pmu_events_list + i; 1992 zfree(&p->symbol); 1993 } 1994 zfree(&perf_pmu_events_list); 1995 perf_pmu_events_list_num = 0; 1996 } 1997 } 1998 1999 #define SET_SYMBOL(str, stype) \ 2000 do { \ 2001 p->symbol = str; \ 2002 if (!p->symbol) \ 2003 goto err; \ 2004 p->type = stype; \ 2005 } while (0) 2006 2007 /* 2008 * Read the pmu events list from sysfs 2009 * Save it into perf_pmu_events_list 2010 */ 2011 static void perf_pmu__parse_init(void) 2012 { 2013 2014 struct perf_pmu *pmu = NULL; 2015 struct perf_pmu_alias *alias; 2016 int len = 0; 2017 2018 pmu = NULL; 2019 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2020 list_for_each_entry(alias, &pmu->aliases, list) { 2021 if (strchr(alias->name, '-')) 2022 len++; 2023 len++; 2024 } 2025 } 2026 2027 if (len == 0) { 2028 perf_pmu_events_list_num = -1; 2029 return; 2030 } 2031 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); 2032 if (!perf_pmu_events_list) 2033 return; 2034 perf_pmu_events_list_num = len; 2035 2036 len = 0; 2037 pmu = NULL; 2038 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2039 list_for_each_entry(alias, &pmu->aliases, list) { 2040 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; 2041 char *tmp = strchr(alias->name, '-'); 2042 2043 if (tmp != NULL) { 2044 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 2045 PMU_EVENT_SYMBOL_PREFIX); 2046 p++; 2047 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); 2048 len += 2; 2049 } else { 2050 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); 2051 len++; 2052 } 2053 } 2054 } 2055 qsort(perf_pmu_events_list, len, 2056 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2057 2058 return; 2059 err: 2060 perf_pmu__parse_cleanup(); 2061 } 2062 2063 /* 2064 * This function injects special term in 2065 * perf_pmu_events_list so the test code 2066 * can check on this functionality. 2067 */ 2068 int perf_pmu__test_parse_init(void) 2069 { 2070 struct perf_pmu_event_symbol *list; 2071 2072 list = malloc(sizeof(*list) * 1); 2073 if (!list) 2074 return -ENOMEM; 2075 2076 list->type = PMU_EVENT_SYMBOL; 2077 list->symbol = strdup("read"); 2078 2079 if (!list->symbol) { 2080 free(list); 2081 return -ENOMEM; 2082 } 2083 2084 perf_pmu_events_list = list; 2085 perf_pmu_events_list_num = 1; 2086 return 0; 2087 } 2088 2089 enum perf_pmu_event_symbol_type 2090 perf_pmu__parse_check(const char *name) 2091 { 2092 struct perf_pmu_event_symbol p, *r; 2093 2094 /* scan kernel pmu events from sysfs if needed */ 2095 if (perf_pmu_events_list_num == 0) 2096 perf_pmu__parse_init(); 2097 /* 2098 * name "cpu" could be prefix of cpu-cycles or cpu// events. 2099 * cpu-cycles has been handled by hardcode. 2100 * So it must be cpu// events, not kernel pmu event. 2101 */ 2102 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) 2103 return PMU_EVENT_SYMBOL_ERR; 2104 2105 p.symbol = strdup(name); 2106 r = bsearch(&p, perf_pmu_events_list, 2107 (size_t) perf_pmu_events_list_num, 2108 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2109 zfree(&p.symbol); 2110 return r ? r->type : PMU_EVENT_SYMBOL_ERR; 2111 } 2112 2113 static int parse_events__scanner(const char *str, 2114 struct parse_events_state *parse_state) 2115 { 2116 YY_BUFFER_STATE buffer; 2117 void *scanner; 2118 int ret; 2119 2120 ret = parse_events_lex_init_extra(parse_state, &scanner); 2121 if (ret) 2122 return ret; 2123 2124 buffer = parse_events__scan_string(str, scanner); 2125 2126 #ifdef PARSER_DEBUG 2127 parse_events_debug = 1; 2128 parse_events_set_debug(1, scanner); 2129 #endif 2130 ret = parse_events_parse(parse_state, scanner); 2131 2132 parse_events__flush_buffer(buffer, scanner); 2133 parse_events__delete_buffer(buffer, scanner); 2134 parse_events_lex_destroy(scanner); 2135 return ret; 2136 } 2137 2138 /* 2139 * parse event config string, return a list of event terms. 2140 */ 2141 int parse_events_terms(struct list_head *terms, const char *str) 2142 { 2143 struct parse_events_state parse_state = { 2144 .terms = NULL, 2145 .stoken = PE_START_TERMS, 2146 }; 2147 int ret; 2148 2149 ret = parse_events__scanner(str, &parse_state); 2150 perf_pmu__parse_cleanup(); 2151 2152 if (!ret) { 2153 list_splice(parse_state.terms, terms); 2154 zfree(&parse_state.terms); 2155 return 0; 2156 } 2157 2158 parse_events_terms__delete(parse_state.terms); 2159 return ret; 2160 } 2161 2162 int __parse_events(struct evlist *evlist, const char *str, 2163 struct parse_events_error *err, struct perf_pmu *fake_pmu) 2164 { 2165 struct parse_events_state parse_state = { 2166 .list = LIST_HEAD_INIT(parse_state.list), 2167 .idx = evlist->core.nr_entries, 2168 .error = err, 2169 .evlist = evlist, 2170 .stoken = PE_START_EVENTS, 2171 .fake_pmu = fake_pmu, 2172 }; 2173 int ret; 2174 2175 ret = parse_events__scanner(str, &parse_state); 2176 perf_pmu__parse_cleanup(); 2177 2178 if (!ret && list_empty(&parse_state.list)) { 2179 WARN_ONCE(true, "WARNING: event parser found nothing\n"); 2180 return -1; 2181 } 2182 2183 /* 2184 * Add list to the evlist even with errors to allow callers to clean up. 2185 */ 2186 evlist__splice_list_tail(evlist, &parse_state.list); 2187 2188 if (!ret) { 2189 struct evsel *last; 2190 2191 evlist->nr_groups += parse_state.nr_groups; 2192 last = evlist__last(evlist); 2193 last->cmdline_group_boundary = true; 2194 2195 return 0; 2196 } 2197 2198 /* 2199 * There are 2 users - builtin-record and builtin-test objects. 2200 * Both call evlist__delete in case of error, so we dont 2201 * need to bother. 2202 */ 2203 return ret; 2204 } 2205 2206 #define MAX_WIDTH 1000 2207 static int get_term_width(void) 2208 { 2209 struct winsize ws; 2210 2211 get_term_dimensions(&ws); 2212 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; 2213 } 2214 2215 static void __parse_events_print_error(int err_idx, const char *err_str, 2216 const char *err_help, const char *event) 2217 { 2218 const char *str = "invalid or unsupported event: "; 2219 char _buf[MAX_WIDTH]; 2220 char *buf = (char *) event; 2221 int idx = 0; 2222 if (err_str) { 2223 /* -2 for extra '' in the final fprintf */ 2224 int width = get_term_width() - 2; 2225 int len_event = strlen(event); 2226 int len_str, max_len, cut = 0; 2227 2228 /* 2229 * Maximum error index indent, we will cut 2230 * the event string if it's bigger. 2231 */ 2232 int max_err_idx = 13; 2233 2234 /* 2235 * Let's be specific with the message when 2236 * we have the precise error. 2237 */ 2238 str = "event syntax error: "; 2239 len_str = strlen(str); 2240 max_len = width - len_str; 2241 2242 buf = _buf; 2243 2244 /* We're cutting from the beginning. */ 2245 if (err_idx > max_err_idx) 2246 cut = err_idx - max_err_idx; 2247 2248 strncpy(buf, event + cut, max_len); 2249 2250 /* Mark cut parts with '..' on both sides. */ 2251 if (cut) 2252 buf[0] = buf[1] = '.'; 2253 2254 if ((len_event - cut) > max_len) { 2255 buf[max_len - 1] = buf[max_len - 2] = '.'; 2256 buf[max_len] = 0; 2257 } 2258 2259 idx = len_str + err_idx - cut; 2260 } 2261 2262 fprintf(stderr, "%s'%s'\n", str, buf); 2263 if (idx) { 2264 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str); 2265 if (err_help) 2266 fprintf(stderr, "\n%s\n", err_help); 2267 } 2268 } 2269 2270 void parse_events_print_error(struct parse_events_error *err, 2271 const char *event) 2272 { 2273 if (!err->num_errors) 2274 return; 2275 2276 __parse_events_print_error(err->idx, err->str, err->help, event); 2277 zfree(&err->str); 2278 zfree(&err->help); 2279 2280 if (err->num_errors > 1) { 2281 fputs("\nInitial error:\n", stderr); 2282 __parse_events_print_error(err->first_idx, err->first_str, 2283 err->first_help, event); 2284 zfree(&err->first_str); 2285 zfree(&err->first_help); 2286 } 2287 } 2288 2289 #undef MAX_WIDTH 2290 2291 int parse_events_option(const struct option *opt, const char *str, 2292 int unset __maybe_unused) 2293 { 2294 struct evlist *evlist = *(struct evlist **)opt->value; 2295 struct parse_events_error err; 2296 int ret; 2297 2298 bzero(&err, sizeof(err)); 2299 ret = parse_events(evlist, str, &err); 2300 2301 if (ret) { 2302 parse_events_print_error(&err, str); 2303 fprintf(stderr, "Run 'perf list' for a list of valid events\n"); 2304 } 2305 2306 return ret; 2307 } 2308 2309 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset) 2310 { 2311 struct evlist **evlistp = opt->value; 2312 int ret; 2313 2314 if (*evlistp == NULL) { 2315 *evlistp = evlist__new(); 2316 2317 if (*evlistp == NULL) { 2318 fprintf(stderr, "Not enough memory to create evlist\n"); 2319 return -1; 2320 } 2321 } 2322 2323 ret = parse_events_option(opt, str, unset); 2324 if (ret) { 2325 evlist__delete(*evlistp); 2326 *evlistp = NULL; 2327 } 2328 2329 return ret; 2330 } 2331 2332 static int 2333 foreach_evsel_in_last_glob(struct evlist *evlist, 2334 int (*func)(struct evsel *evsel, 2335 const void *arg), 2336 const void *arg) 2337 { 2338 struct evsel *last = NULL; 2339 int err; 2340 2341 /* 2342 * Don't return when list_empty, give func a chance to report 2343 * error when it found last == NULL. 2344 * 2345 * So no need to WARN here, let *func do this. 2346 */ 2347 if (evlist->core.nr_entries > 0) 2348 last = evlist__last(evlist); 2349 2350 do { 2351 err = (*func)(last, arg); 2352 if (err) 2353 return -1; 2354 if (!last) 2355 return 0; 2356 2357 if (last->core.node.prev == &evlist->core.entries) 2358 return 0; 2359 last = list_entry(last->core.node.prev, struct evsel, core.node); 2360 } while (!last->cmdline_group_boundary); 2361 2362 return 0; 2363 } 2364 2365 static int set_filter(struct evsel *evsel, const void *arg) 2366 { 2367 const char *str = arg; 2368 bool found = false; 2369 int nr_addr_filters = 0; 2370 struct perf_pmu *pmu = NULL; 2371 2372 if (evsel == NULL) { 2373 fprintf(stderr, 2374 "--filter option should follow a -e tracepoint or HW tracer option\n"); 2375 return -1; 2376 } 2377 2378 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) { 2379 if (evsel__append_tp_filter(evsel, str) < 0) { 2380 fprintf(stderr, 2381 "not enough memory to hold filter string\n"); 2382 return -1; 2383 } 2384 2385 return 0; 2386 } 2387 2388 while ((pmu = perf_pmu__scan(pmu)) != NULL) 2389 if (pmu->type == evsel->core.attr.type) { 2390 found = true; 2391 break; 2392 } 2393 2394 if (found) 2395 perf_pmu__scan_file(pmu, "nr_addr_filters", 2396 "%d", &nr_addr_filters); 2397 2398 if (!nr_addr_filters) { 2399 fprintf(stderr, 2400 "This CPU does not support address filtering\n"); 2401 return -1; 2402 } 2403 2404 if (evsel__append_addr_filter(evsel, str) < 0) { 2405 fprintf(stderr, 2406 "not enough memory to hold filter string\n"); 2407 return -1; 2408 } 2409 2410 return 0; 2411 } 2412 2413 int parse_filter(const struct option *opt, const char *str, 2414 int unset __maybe_unused) 2415 { 2416 struct evlist *evlist = *(struct evlist **)opt->value; 2417 2418 return foreach_evsel_in_last_glob(evlist, set_filter, 2419 (const void *)str); 2420 } 2421 2422 static int add_exclude_perf_filter(struct evsel *evsel, 2423 const void *arg __maybe_unused) 2424 { 2425 char new_filter[64]; 2426 2427 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) { 2428 fprintf(stderr, 2429 "--exclude-perf option should follow a -e tracepoint option\n"); 2430 return -1; 2431 } 2432 2433 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid()); 2434 2435 if (evsel__append_tp_filter(evsel, new_filter) < 0) { 2436 fprintf(stderr, 2437 "not enough memory to hold filter string\n"); 2438 return -1; 2439 } 2440 2441 return 0; 2442 } 2443 2444 int exclude_perf(const struct option *opt, 2445 const char *arg __maybe_unused, 2446 int unset __maybe_unused) 2447 { 2448 struct evlist *evlist = *(struct evlist **)opt->value; 2449 2450 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter, 2451 NULL); 2452 } 2453 2454 static const char * const event_type_descriptors[] = { 2455 "Hardware event", 2456 "Software event", 2457 "Tracepoint event", 2458 "Hardware cache event", 2459 "Raw hardware event descriptor", 2460 "Hardware breakpoint", 2461 }; 2462 2463 static int cmp_string(const void *a, const void *b) 2464 { 2465 const char * const *as = a; 2466 const char * const *bs = b; 2467 2468 return strcmp(*as, *bs); 2469 } 2470 2471 /* 2472 * Print the events from <debugfs_mount_point>/tracing/events 2473 */ 2474 2475 void print_tracepoint_events(const char *subsys_glob, const char *event_glob, 2476 bool name_only) 2477 { 2478 DIR *sys_dir, *evt_dir; 2479 struct dirent *sys_dirent, *evt_dirent; 2480 char evt_path[MAXPATHLEN]; 2481 char *dir_path; 2482 char **evt_list = NULL; 2483 unsigned int evt_i = 0, evt_num = 0; 2484 bool evt_num_known = false; 2485 2486 restart: 2487 sys_dir = tracing_events__opendir(); 2488 if (!sys_dir) 2489 return; 2490 2491 if (evt_num_known) { 2492 evt_list = zalloc(sizeof(char *) * evt_num); 2493 if (!evt_list) 2494 goto out_close_sys_dir; 2495 } 2496 2497 for_each_subsystem(sys_dir, sys_dirent) { 2498 if (subsys_glob != NULL && 2499 !strglobmatch(sys_dirent->d_name, subsys_glob)) 2500 continue; 2501 2502 dir_path = get_events_file(sys_dirent->d_name); 2503 if (!dir_path) 2504 continue; 2505 evt_dir = opendir(dir_path); 2506 if (!evt_dir) 2507 goto next; 2508 2509 for_each_event(dir_path, evt_dir, evt_dirent) { 2510 if (event_glob != NULL && 2511 !strglobmatch(evt_dirent->d_name, event_glob)) 2512 continue; 2513 2514 if (!evt_num_known) { 2515 evt_num++; 2516 continue; 2517 } 2518 2519 snprintf(evt_path, MAXPATHLEN, "%s:%s", 2520 sys_dirent->d_name, evt_dirent->d_name); 2521 2522 evt_list[evt_i] = strdup(evt_path); 2523 if (evt_list[evt_i] == NULL) { 2524 put_events_file(dir_path); 2525 goto out_close_evt_dir; 2526 } 2527 evt_i++; 2528 } 2529 closedir(evt_dir); 2530 next: 2531 put_events_file(dir_path); 2532 } 2533 closedir(sys_dir); 2534 2535 if (!evt_num_known) { 2536 evt_num_known = true; 2537 goto restart; 2538 } 2539 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 2540 evt_i = 0; 2541 while (evt_i < evt_num) { 2542 if (name_only) { 2543 printf("%s ", evt_list[evt_i++]); 2544 continue; 2545 } 2546 printf(" %-50s [%s]\n", evt_list[evt_i++], 2547 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 2548 } 2549 if (evt_num && pager_in_use()) 2550 printf("\n"); 2551 2552 out_free: 2553 evt_num = evt_i; 2554 for (evt_i = 0; evt_i < evt_num; evt_i++) 2555 zfree(&evt_list[evt_i]); 2556 zfree(&evt_list); 2557 return; 2558 2559 out_close_evt_dir: 2560 closedir(evt_dir); 2561 out_close_sys_dir: 2562 closedir(sys_dir); 2563 2564 printf("FATAL: not enough memory to print %s\n", 2565 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 2566 if (evt_list) 2567 goto out_free; 2568 } 2569 2570 /* 2571 * Check whether event is in <debugfs_mount_point>/tracing/events 2572 */ 2573 2574 int is_valid_tracepoint(const char *event_string) 2575 { 2576 DIR *sys_dir, *evt_dir; 2577 struct dirent *sys_dirent, *evt_dirent; 2578 char evt_path[MAXPATHLEN]; 2579 char *dir_path; 2580 2581 sys_dir = tracing_events__opendir(); 2582 if (!sys_dir) 2583 return 0; 2584 2585 for_each_subsystem(sys_dir, sys_dirent) { 2586 dir_path = get_events_file(sys_dirent->d_name); 2587 if (!dir_path) 2588 continue; 2589 evt_dir = opendir(dir_path); 2590 if (!evt_dir) 2591 goto next; 2592 2593 for_each_event(dir_path, evt_dir, evt_dirent) { 2594 snprintf(evt_path, MAXPATHLEN, "%s:%s", 2595 sys_dirent->d_name, evt_dirent->d_name); 2596 if (!strcmp(evt_path, event_string)) { 2597 closedir(evt_dir); 2598 closedir(sys_dir); 2599 return 1; 2600 } 2601 } 2602 closedir(evt_dir); 2603 next: 2604 put_events_file(dir_path); 2605 } 2606 closedir(sys_dir); 2607 return 0; 2608 } 2609 2610 static bool is_event_supported(u8 type, unsigned config) 2611 { 2612 bool ret = true; 2613 int open_return; 2614 struct evsel *evsel; 2615 struct perf_event_attr attr = { 2616 .type = type, 2617 .config = config, 2618 .disabled = 1, 2619 }; 2620 struct perf_thread_map *tmap = thread_map__new_by_tid(0); 2621 2622 if (tmap == NULL) 2623 return false; 2624 2625 evsel = evsel__new(&attr); 2626 if (evsel) { 2627 open_return = evsel__open(evsel, NULL, tmap); 2628 ret = open_return >= 0; 2629 2630 if (open_return == -EACCES) { 2631 /* 2632 * This happens if the paranoid value 2633 * /proc/sys/kernel/perf_event_paranoid is set to 2 2634 * Re-run with exclude_kernel set; we don't do that 2635 * by default as some ARM machines do not support it. 2636 * 2637 */ 2638 evsel->core.attr.exclude_kernel = 1; 2639 ret = evsel__open(evsel, NULL, tmap) >= 0; 2640 } 2641 evsel__delete(evsel); 2642 } 2643 2644 perf_thread_map__put(tmap); 2645 return ret; 2646 } 2647 2648 void print_sdt_events(const char *subsys_glob, const char *event_glob, 2649 bool name_only) 2650 { 2651 struct probe_cache *pcache; 2652 struct probe_cache_entry *ent; 2653 struct strlist *bidlist, *sdtlist; 2654 struct strlist_config cfg = {.dont_dupstr = true}; 2655 struct str_node *nd, *nd2; 2656 char *buf, *path, *ptr = NULL; 2657 bool show_detail = false; 2658 int ret; 2659 2660 sdtlist = strlist__new(NULL, &cfg); 2661 if (!sdtlist) { 2662 pr_debug("Failed to allocate new strlist for SDT\n"); 2663 return; 2664 } 2665 bidlist = build_id_cache__list_all(true); 2666 if (!bidlist) { 2667 pr_debug("Failed to get buildids: %d\n", errno); 2668 return; 2669 } 2670 strlist__for_each_entry(nd, bidlist) { 2671 pcache = probe_cache__new(nd->s, NULL); 2672 if (!pcache) 2673 continue; 2674 list_for_each_entry(ent, &pcache->entries, node) { 2675 if (!ent->sdt) 2676 continue; 2677 if (subsys_glob && 2678 !strglobmatch(ent->pev.group, subsys_glob)) 2679 continue; 2680 if (event_glob && 2681 !strglobmatch(ent->pev.event, event_glob)) 2682 continue; 2683 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group, 2684 ent->pev.event, nd->s); 2685 if (ret > 0) 2686 strlist__add(sdtlist, buf); 2687 } 2688 probe_cache__delete(pcache); 2689 } 2690 strlist__delete(bidlist); 2691 2692 strlist__for_each_entry(nd, sdtlist) { 2693 buf = strchr(nd->s, '@'); 2694 if (buf) 2695 *(buf++) = '\0'; 2696 if (name_only) { 2697 printf("%s ", nd->s); 2698 continue; 2699 } 2700 nd2 = strlist__next(nd); 2701 if (nd2) { 2702 ptr = strchr(nd2->s, '@'); 2703 if (ptr) 2704 *ptr = '\0'; 2705 if (strcmp(nd->s, nd2->s) == 0) 2706 show_detail = true; 2707 } 2708 if (show_detail) { 2709 path = build_id_cache__origname(buf); 2710 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf); 2711 if (ret > 0) { 2712 printf(" %-50s [%s]\n", buf, "SDT event"); 2713 free(buf); 2714 } 2715 free(path); 2716 } else 2717 printf(" %-50s [%s]\n", nd->s, "SDT event"); 2718 if (nd2) { 2719 if (strcmp(nd->s, nd2->s) != 0) 2720 show_detail = false; 2721 if (ptr) 2722 *ptr = '@'; 2723 } 2724 } 2725 strlist__delete(sdtlist); 2726 } 2727 2728 int print_hwcache_events(const char *event_glob, bool name_only) 2729 { 2730 unsigned int type, op, i, evt_i = 0, evt_num = 0; 2731 char name[64]; 2732 char **evt_list = NULL; 2733 bool evt_num_known = false; 2734 2735 restart: 2736 if (evt_num_known) { 2737 evt_list = zalloc(sizeof(char *) * evt_num); 2738 if (!evt_list) 2739 goto out_enomem; 2740 } 2741 2742 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 2743 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 2744 /* skip invalid cache type */ 2745 if (!evsel__is_cache_op_valid(type, op)) 2746 continue; 2747 2748 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 2749 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name)); 2750 if (event_glob != NULL && !strglobmatch(name, event_glob)) 2751 continue; 2752 2753 if (!is_event_supported(PERF_TYPE_HW_CACHE, 2754 type | (op << 8) | (i << 16))) 2755 continue; 2756 2757 if (!evt_num_known) { 2758 evt_num++; 2759 continue; 2760 } 2761 2762 evt_list[evt_i] = strdup(name); 2763 if (evt_list[evt_i] == NULL) 2764 goto out_enomem; 2765 evt_i++; 2766 } 2767 } 2768 } 2769 2770 if (!evt_num_known) { 2771 evt_num_known = true; 2772 goto restart; 2773 } 2774 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 2775 evt_i = 0; 2776 while (evt_i < evt_num) { 2777 if (name_only) { 2778 printf("%s ", evt_list[evt_i++]); 2779 continue; 2780 } 2781 printf(" %-50s [%s]\n", evt_list[evt_i++], 2782 event_type_descriptors[PERF_TYPE_HW_CACHE]); 2783 } 2784 if (evt_num && pager_in_use()) 2785 printf("\n"); 2786 2787 out_free: 2788 evt_num = evt_i; 2789 for (evt_i = 0; evt_i < evt_num; evt_i++) 2790 zfree(&evt_list[evt_i]); 2791 zfree(&evt_list); 2792 return evt_num; 2793 2794 out_enomem: 2795 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]); 2796 if (evt_list) 2797 goto out_free; 2798 return evt_num; 2799 } 2800 2801 static void print_tool_event(const char *name, const char *event_glob, 2802 bool name_only) 2803 { 2804 if (event_glob && !strglobmatch(name, event_glob)) 2805 return; 2806 if (name_only) 2807 printf("%s ", name); 2808 else 2809 printf(" %-50s [%s]\n", name, "Tool event"); 2810 2811 } 2812 2813 void print_tool_events(const char *event_glob, bool name_only) 2814 { 2815 print_tool_event("duration_time", event_glob, name_only); 2816 if (pager_in_use()) 2817 printf("\n"); 2818 } 2819 2820 void print_symbol_events(const char *event_glob, unsigned type, 2821 struct event_symbol *syms, unsigned max, 2822 bool name_only) 2823 { 2824 unsigned int i, evt_i = 0, evt_num = 0; 2825 char name[MAX_NAME_LEN]; 2826 char **evt_list = NULL; 2827 bool evt_num_known = false; 2828 2829 restart: 2830 if (evt_num_known) { 2831 evt_list = zalloc(sizeof(char *) * evt_num); 2832 if (!evt_list) 2833 goto out_enomem; 2834 syms -= max; 2835 } 2836 2837 for (i = 0; i < max; i++, syms++) { 2838 2839 if (event_glob != NULL && syms->symbol != NULL && 2840 !(strglobmatch(syms->symbol, event_glob) || 2841 (syms->alias && strglobmatch(syms->alias, event_glob)))) 2842 continue; 2843 2844 if (!is_event_supported(type, i)) 2845 continue; 2846 2847 if (!evt_num_known) { 2848 evt_num++; 2849 continue; 2850 } 2851 2852 if (!name_only && strlen(syms->alias)) 2853 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); 2854 else 2855 strlcpy(name, syms->symbol, MAX_NAME_LEN); 2856 2857 evt_list[evt_i] = strdup(name); 2858 if (evt_list[evt_i] == NULL) 2859 goto out_enomem; 2860 evt_i++; 2861 } 2862 2863 if (!evt_num_known) { 2864 evt_num_known = true; 2865 goto restart; 2866 } 2867 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 2868 evt_i = 0; 2869 while (evt_i < evt_num) { 2870 if (name_only) { 2871 printf("%s ", evt_list[evt_i++]); 2872 continue; 2873 } 2874 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]); 2875 } 2876 if (evt_num && pager_in_use()) 2877 printf("\n"); 2878 2879 out_free: 2880 evt_num = evt_i; 2881 for (evt_i = 0; evt_i < evt_num; evt_i++) 2882 zfree(&evt_list[evt_i]); 2883 zfree(&evt_list); 2884 return; 2885 2886 out_enomem: 2887 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]); 2888 if (evt_list) 2889 goto out_free; 2890 } 2891 2892 /* 2893 * Print the help text for the event symbols: 2894 */ 2895 void print_events(const char *event_glob, bool name_only, bool quiet_flag, 2896 bool long_desc, bool details_flag, bool deprecated) 2897 { 2898 print_symbol_events(event_glob, PERF_TYPE_HARDWARE, 2899 event_symbols_hw, PERF_COUNT_HW_MAX, name_only); 2900 2901 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE, 2902 event_symbols_sw, PERF_COUNT_SW_MAX, name_only); 2903 print_tool_events(event_glob, name_only); 2904 2905 print_hwcache_events(event_glob, name_only); 2906 2907 print_pmu_events(event_glob, name_only, quiet_flag, long_desc, 2908 details_flag, deprecated); 2909 2910 if (event_glob != NULL) 2911 return; 2912 2913 if (!name_only) { 2914 printf(" %-50s [%s]\n", 2915 "rNNN", 2916 event_type_descriptors[PERF_TYPE_RAW]); 2917 printf(" %-50s [%s]\n", 2918 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 2919 event_type_descriptors[PERF_TYPE_RAW]); 2920 if (pager_in_use()) 2921 printf(" (see 'man perf-list' on how to encode it)\n\n"); 2922 2923 printf(" %-50s [%s]\n", 2924 "mem:<addr>[/len][:access]", 2925 event_type_descriptors[PERF_TYPE_BREAKPOINT]); 2926 if (pager_in_use()) 2927 printf("\n"); 2928 } 2929 2930 print_tracepoint_events(NULL, NULL, name_only); 2931 2932 print_sdt_events(NULL, NULL, name_only); 2933 2934 metricgroup__print(true, true, NULL, name_only, details_flag); 2935 2936 print_libpfm_events(name_only, long_desc); 2937 } 2938 2939 int parse_events__is_hardcoded_term(struct parse_events_term *term) 2940 { 2941 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; 2942 } 2943 2944 static int new_term(struct parse_events_term **_term, 2945 struct parse_events_term *temp, 2946 char *str, u64 num) 2947 { 2948 struct parse_events_term *term; 2949 2950 term = malloc(sizeof(*term)); 2951 if (!term) 2952 return -ENOMEM; 2953 2954 *term = *temp; 2955 INIT_LIST_HEAD(&term->list); 2956 term->weak = false; 2957 2958 switch (term->type_val) { 2959 case PARSE_EVENTS__TERM_TYPE_NUM: 2960 term->val.num = num; 2961 break; 2962 case PARSE_EVENTS__TERM_TYPE_STR: 2963 term->val.str = str; 2964 break; 2965 default: 2966 free(term); 2967 return -EINVAL; 2968 } 2969 2970 *_term = term; 2971 return 0; 2972 } 2973 2974 int parse_events_term__num(struct parse_events_term **term, 2975 int type_term, char *config, u64 num, 2976 bool no_value, 2977 void *loc_term_, void *loc_val_) 2978 { 2979 YYLTYPE *loc_term = loc_term_; 2980 YYLTYPE *loc_val = loc_val_; 2981 2982 struct parse_events_term temp = { 2983 .type_val = PARSE_EVENTS__TERM_TYPE_NUM, 2984 .type_term = type_term, 2985 .config = config, 2986 .no_value = no_value, 2987 .err_term = loc_term ? loc_term->first_column : 0, 2988 .err_val = loc_val ? loc_val->first_column : 0, 2989 }; 2990 2991 return new_term(term, &temp, NULL, num); 2992 } 2993 2994 int parse_events_term__str(struct parse_events_term **term, 2995 int type_term, char *config, char *str, 2996 void *loc_term_, void *loc_val_) 2997 { 2998 YYLTYPE *loc_term = loc_term_; 2999 YYLTYPE *loc_val = loc_val_; 3000 3001 struct parse_events_term temp = { 3002 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 3003 .type_term = type_term, 3004 .config = config, 3005 .err_term = loc_term ? loc_term->first_column : 0, 3006 .err_val = loc_val ? loc_val->first_column : 0, 3007 }; 3008 3009 return new_term(term, &temp, str, 0); 3010 } 3011 3012 int parse_events_term__sym_hw(struct parse_events_term **term, 3013 char *config, unsigned idx) 3014 { 3015 struct event_symbol *sym; 3016 char *str; 3017 struct parse_events_term temp = { 3018 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 3019 .type_term = PARSE_EVENTS__TERM_TYPE_USER, 3020 .config = config, 3021 }; 3022 3023 if (!temp.config) { 3024 temp.config = strdup("event"); 3025 if (!temp.config) 3026 return -ENOMEM; 3027 } 3028 BUG_ON(idx >= PERF_COUNT_HW_MAX); 3029 sym = &event_symbols_hw[idx]; 3030 3031 str = strdup(sym->symbol); 3032 if (!str) 3033 return -ENOMEM; 3034 return new_term(term, &temp, str, 0); 3035 } 3036 3037 int parse_events_term__clone(struct parse_events_term **new, 3038 struct parse_events_term *term) 3039 { 3040 char *str; 3041 struct parse_events_term temp = { 3042 .type_val = term->type_val, 3043 .type_term = term->type_term, 3044 .config = NULL, 3045 .err_term = term->err_term, 3046 .err_val = term->err_val, 3047 }; 3048 3049 if (term->config) { 3050 temp.config = strdup(term->config); 3051 if (!temp.config) 3052 return -ENOMEM; 3053 } 3054 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) 3055 return new_term(new, &temp, NULL, term->val.num); 3056 3057 str = strdup(term->val.str); 3058 if (!str) 3059 return -ENOMEM; 3060 return new_term(new, &temp, str, 0); 3061 } 3062 3063 void parse_events_term__delete(struct parse_events_term *term) 3064 { 3065 if (term->array.nr_ranges) 3066 zfree(&term->array.ranges); 3067 3068 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) 3069 zfree(&term->val.str); 3070 3071 zfree(&term->config); 3072 free(term); 3073 } 3074 3075 int parse_events_copy_term_list(struct list_head *old, 3076 struct list_head **new) 3077 { 3078 struct parse_events_term *term, *n; 3079 int ret; 3080 3081 if (!old) { 3082 *new = NULL; 3083 return 0; 3084 } 3085 3086 *new = malloc(sizeof(struct list_head)); 3087 if (!*new) 3088 return -ENOMEM; 3089 INIT_LIST_HEAD(*new); 3090 3091 list_for_each_entry (term, old, list) { 3092 ret = parse_events_term__clone(&n, term); 3093 if (ret) 3094 return ret; 3095 list_add_tail(&n->list, *new); 3096 } 3097 return 0; 3098 } 3099 3100 void parse_events_terms__purge(struct list_head *terms) 3101 { 3102 struct parse_events_term *term, *h; 3103 3104 list_for_each_entry_safe(term, h, terms, list) { 3105 list_del_init(&term->list); 3106 parse_events_term__delete(term); 3107 } 3108 } 3109 3110 void parse_events_terms__delete(struct list_head *terms) 3111 { 3112 if (!terms) 3113 return; 3114 parse_events_terms__purge(terms); 3115 free(terms); 3116 } 3117 3118 void parse_events__clear_array(struct parse_events_array *a) 3119 { 3120 zfree(&a->ranges); 3121 } 3122 3123 void parse_events_evlist_error(struct parse_events_state *parse_state, 3124 int idx, const char *str) 3125 { 3126 if (!parse_state->error) 3127 return; 3128 3129 parse_events__handle_error(parse_state->error, idx, strdup(str), NULL); 3130 } 3131 3132 static void config_terms_list(char *buf, size_t buf_sz) 3133 { 3134 int i; 3135 bool first = true; 3136 3137 buf[0] = '\0'; 3138 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) { 3139 const char *name = config_term_names[i]; 3140 3141 if (!config_term_avail(i, NULL)) 3142 continue; 3143 if (!name) 3144 continue; 3145 if (name[0] == '<') 3146 continue; 3147 3148 if (strlen(buf) + strlen(name) + 2 >= buf_sz) 3149 return; 3150 3151 if (!first) 3152 strcat(buf, ","); 3153 else 3154 first = false; 3155 strcat(buf, name); 3156 } 3157 } 3158 3159 /* 3160 * Return string contains valid config terms of an event. 3161 * @additional_terms: For terms such as PMU sysfs terms. 3162 */ 3163 char *parse_events_formats_error_string(char *additional_terms) 3164 { 3165 char *str; 3166 /* "no-overwrite" is the longest name */ 3167 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR * 3168 (sizeof("no-overwrite") - 1)]; 3169 3170 config_terms_list(static_terms, sizeof(static_terms)); 3171 /* valid terms */ 3172 if (additional_terms) { 3173 if (asprintf(&str, "valid terms: %s,%s", 3174 additional_terms, static_terms) < 0) 3175 goto fail; 3176 } else { 3177 if (asprintf(&str, "valid terms: %s", static_terms) < 0) 3178 goto fail; 3179 } 3180 return str; 3181 3182 fail: 3183 return NULL; 3184 } 3185