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