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/param.h> 9 #include "term.h" 10 #include "evlist.h" 11 #include "evsel.h" 12 #include <subcmd/parse-options.h> 13 #include "parse-events.h" 14 #include "string2.h" 15 #include "strlist.h" 16 #include "bpf-loader.h" 17 #include "debug.h" 18 #include <api/fs/tracing_path.h> 19 #include <perf/cpumap.h> 20 #include "parse-events-bison.h" 21 #include "parse-events-flex.h" 22 #include "pmu.h" 23 #include "asm/bug.h" 24 #include "util/parse-branch-options.h" 25 #include "util/evsel_config.h" 26 #include "util/event.h" 27 #include "perf.h" 28 #include "util/parse-events-hybrid.h" 29 #include "util/pmu-hybrid.h" 30 #include "tracepoint.h" 31 #include "thread_map.h" 32 33 #define MAX_NAME_LEN 100 34 35 struct perf_pmu_event_symbol { 36 char *symbol; 37 enum perf_pmu_event_symbol_type type; 38 }; 39 40 #ifdef PARSER_DEBUG 41 extern int parse_events_debug; 42 #endif 43 int parse_events_parse(void *parse_state, void *scanner); 44 static int get_config_terms(struct list_head *head_config, 45 struct list_head *head_terms __maybe_unused); 46 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state, 47 const char *str, char *pmu_name, 48 struct list_head *list); 49 50 static struct perf_pmu_event_symbol *perf_pmu_events_list; 51 /* 52 * The variable indicates the number of supported pmu event symbols. 53 * 0 means not initialized and ready to init 54 * -1 means failed to init, don't try anymore 55 * >0 is the number of supported pmu event symbols 56 */ 57 static int perf_pmu_events_list_num; 58 59 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { 60 [PERF_COUNT_HW_CPU_CYCLES] = { 61 .symbol = "cpu-cycles", 62 .alias = "cycles", 63 }, 64 [PERF_COUNT_HW_INSTRUCTIONS] = { 65 .symbol = "instructions", 66 .alias = "", 67 }, 68 [PERF_COUNT_HW_CACHE_REFERENCES] = { 69 .symbol = "cache-references", 70 .alias = "", 71 }, 72 [PERF_COUNT_HW_CACHE_MISSES] = { 73 .symbol = "cache-misses", 74 .alias = "", 75 }, 76 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 77 .symbol = "branch-instructions", 78 .alias = "branches", 79 }, 80 [PERF_COUNT_HW_BRANCH_MISSES] = { 81 .symbol = "branch-misses", 82 .alias = "", 83 }, 84 [PERF_COUNT_HW_BUS_CYCLES] = { 85 .symbol = "bus-cycles", 86 .alias = "", 87 }, 88 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { 89 .symbol = "stalled-cycles-frontend", 90 .alias = "idle-cycles-frontend", 91 }, 92 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { 93 .symbol = "stalled-cycles-backend", 94 .alias = "idle-cycles-backend", 95 }, 96 [PERF_COUNT_HW_REF_CPU_CYCLES] = { 97 .symbol = "ref-cycles", 98 .alias = "", 99 }, 100 }; 101 102 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { 103 [PERF_COUNT_SW_CPU_CLOCK] = { 104 .symbol = "cpu-clock", 105 .alias = "", 106 }, 107 [PERF_COUNT_SW_TASK_CLOCK] = { 108 .symbol = "task-clock", 109 .alias = "", 110 }, 111 [PERF_COUNT_SW_PAGE_FAULTS] = { 112 .symbol = "page-faults", 113 .alias = "faults", 114 }, 115 [PERF_COUNT_SW_CONTEXT_SWITCHES] = { 116 .symbol = "context-switches", 117 .alias = "cs", 118 }, 119 [PERF_COUNT_SW_CPU_MIGRATIONS] = { 120 .symbol = "cpu-migrations", 121 .alias = "migrations", 122 }, 123 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { 124 .symbol = "minor-faults", 125 .alias = "", 126 }, 127 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { 128 .symbol = "major-faults", 129 .alias = "", 130 }, 131 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { 132 .symbol = "alignment-faults", 133 .alias = "", 134 }, 135 [PERF_COUNT_SW_EMULATION_FAULTS] = { 136 .symbol = "emulation-faults", 137 .alias = "", 138 }, 139 [PERF_COUNT_SW_DUMMY] = { 140 .symbol = "dummy", 141 .alias = "", 142 }, 143 [PERF_COUNT_SW_BPF_OUTPUT] = { 144 .symbol = "bpf-output", 145 .alias = "", 146 }, 147 [PERF_COUNT_SW_CGROUP_SWITCHES] = { 148 .symbol = "cgroup-switches", 149 .alias = "", 150 }, 151 }; 152 153 bool is_event_supported(u8 type, u64 config) 154 { 155 bool ret = true; 156 int open_return; 157 struct evsel *evsel; 158 struct perf_event_attr attr = { 159 .type = type, 160 .config = config, 161 .disabled = 1, 162 }; 163 struct perf_thread_map *tmap = thread_map__new_by_tid(0); 164 165 if (tmap == NULL) 166 return false; 167 168 evsel = evsel__new(&attr); 169 if (evsel) { 170 open_return = evsel__open(evsel, NULL, tmap); 171 ret = open_return >= 0; 172 173 if (open_return == -EACCES) { 174 /* 175 * This happens if the paranoid value 176 * /proc/sys/kernel/perf_event_paranoid is set to 2 177 * Re-run with exclude_kernel set; we don't do that 178 * by default as some ARM machines do not support it. 179 * 180 */ 181 evsel->core.attr.exclude_kernel = 1; 182 ret = evsel__open(evsel, NULL, tmap) >= 0; 183 } 184 evsel__delete(evsel); 185 } 186 187 perf_thread_map__put(tmap); 188 return ret; 189 } 190 191 const char *event_type(int type) 192 { 193 switch (type) { 194 case PERF_TYPE_HARDWARE: 195 return "hardware"; 196 197 case PERF_TYPE_SOFTWARE: 198 return "software"; 199 200 case PERF_TYPE_TRACEPOINT: 201 return "tracepoint"; 202 203 case PERF_TYPE_HW_CACHE: 204 return "hardware-cache"; 205 206 default: 207 break; 208 } 209 210 return "unknown"; 211 } 212 213 static char *get_config_str(struct list_head *head_terms, int type_term) 214 { 215 struct parse_events_term *term; 216 217 if (!head_terms) 218 return NULL; 219 220 list_for_each_entry(term, head_terms, list) 221 if (term->type_term == type_term) 222 return term->val.str; 223 224 return NULL; 225 } 226 227 static char *get_config_metric_id(struct list_head *head_terms) 228 { 229 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_METRIC_ID); 230 } 231 232 static char *get_config_name(struct list_head *head_terms) 233 { 234 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_NAME); 235 } 236 237 static struct evsel * 238 __add_event(struct list_head *list, int *idx, 239 struct perf_event_attr *attr, 240 bool init_attr, 241 const char *name, const char *metric_id, struct perf_pmu *pmu, 242 struct list_head *config_terms, bool auto_merge_stats, 243 const char *cpu_list) 244 { 245 struct evsel *evsel; 246 struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) : 247 cpu_list ? perf_cpu_map__new(cpu_list) : NULL; 248 249 if (pmu && attr->type == PERF_TYPE_RAW) 250 perf_pmu__warn_invalid_config(pmu, attr->config, name); 251 252 if (init_attr) 253 event_attr_init(attr); 254 255 evsel = evsel__new_idx(attr, *idx); 256 if (!evsel) { 257 perf_cpu_map__put(cpus); 258 return NULL; 259 } 260 261 (*idx)++; 262 evsel->core.cpus = cpus; 263 evsel->core.own_cpus = perf_cpu_map__get(cpus); 264 evsel->core.requires_cpu = pmu ? pmu->is_uncore : false; 265 evsel->auto_merge_stats = auto_merge_stats; 266 267 if (name) 268 evsel->name = strdup(name); 269 270 if (metric_id) 271 evsel->metric_id = strdup(metric_id); 272 273 if (config_terms) 274 list_splice_init(config_terms, &evsel->config_terms); 275 276 if (list) 277 list_add_tail(&evsel->core.node, list); 278 279 return evsel; 280 } 281 282 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr, 283 const char *name, const char *metric_id, 284 struct perf_pmu *pmu) 285 { 286 return __add_event(/*list=*/NULL, &idx, attr, /*init_attr=*/false, name, 287 metric_id, pmu, /*config_terms=*/NULL, 288 /*auto_merge_stats=*/false, /*cpu_list=*/NULL); 289 } 290 291 static int add_event(struct list_head *list, int *idx, 292 struct perf_event_attr *attr, const char *name, 293 const char *metric_id, struct list_head *config_terms) 294 { 295 return __add_event(list, idx, attr, /*init_attr*/true, name, metric_id, 296 /*pmu=*/NULL, config_terms, 297 /*auto_merge_stats=*/false, /*cpu_list=*/NULL) ? 0 : -ENOMEM; 298 } 299 300 static int add_event_tool(struct list_head *list, int *idx, 301 enum perf_tool_event tool_event) 302 { 303 struct evsel *evsel; 304 struct perf_event_attr attr = { 305 .type = PERF_TYPE_SOFTWARE, 306 .config = PERF_COUNT_SW_DUMMY, 307 }; 308 309 evsel = __add_event(list, idx, &attr, /*init_attr=*/true, /*name=*/NULL, 310 /*metric_id=*/NULL, /*pmu=*/NULL, 311 /*config_terms=*/NULL, /*auto_merge_stats=*/false, 312 /*cpu_list=*/"0"); 313 if (!evsel) 314 return -ENOMEM; 315 evsel->tool_event = tool_event; 316 if (tool_event == PERF_TOOL_DURATION_TIME 317 || tool_event == PERF_TOOL_USER_TIME 318 || tool_event == PERF_TOOL_SYSTEM_TIME) { 319 free((char *)evsel->unit); 320 evsel->unit = strdup("ns"); 321 } 322 return 0; 323 } 324 325 static int parse_aliases(char *str, const char *const names[][EVSEL__MAX_ALIASES], int size) 326 { 327 int i, j; 328 int n, longest = -1; 329 330 for (i = 0; i < size; i++) { 331 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) { 332 n = strlen(names[i][j]); 333 if (n > longest && !strncasecmp(str, names[i][j], n)) 334 longest = n; 335 } 336 if (longest > 0) 337 return i; 338 } 339 340 return -1; 341 } 342 343 typedef int config_term_func_t(struct perf_event_attr *attr, 344 struct parse_events_term *term, 345 struct parse_events_error *err); 346 static int config_term_common(struct perf_event_attr *attr, 347 struct parse_events_term *term, 348 struct parse_events_error *err); 349 static int config_attr(struct perf_event_attr *attr, 350 struct list_head *head, 351 struct parse_events_error *err, 352 config_term_func_t config_term); 353 354 int parse_events_add_cache(struct list_head *list, int *idx, 355 char *type, char *op_result1, char *op_result2, 356 struct parse_events_error *err, 357 struct list_head *head_config, 358 struct parse_events_state *parse_state) 359 { 360 struct perf_event_attr attr; 361 LIST_HEAD(config_terms); 362 char name[MAX_NAME_LEN]; 363 const char *config_name, *metric_id; 364 int cache_type = -1, cache_op = -1, cache_result = -1; 365 char *op_result[2] = { op_result1, op_result2 }; 366 int i, n, ret; 367 bool hybrid; 368 369 /* 370 * No fallback - if we cannot get a clear cache type 371 * then bail out: 372 */ 373 cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX); 374 if (cache_type == -1) 375 return -EINVAL; 376 377 config_name = get_config_name(head_config); 378 n = snprintf(name, MAX_NAME_LEN, "%s", type); 379 380 for (i = 0; (i < 2) && (op_result[i]); i++) { 381 char *str = op_result[i]; 382 383 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); 384 385 if (cache_op == -1) { 386 cache_op = parse_aliases(str, evsel__hw_cache_op, 387 PERF_COUNT_HW_CACHE_OP_MAX); 388 if (cache_op >= 0) { 389 if (!evsel__is_cache_op_valid(cache_type, cache_op)) 390 return -EINVAL; 391 continue; 392 } 393 } 394 395 if (cache_result == -1) { 396 cache_result = parse_aliases(str, evsel__hw_cache_result, 397 PERF_COUNT_HW_CACHE_RESULT_MAX); 398 if (cache_result >= 0) 399 continue; 400 } 401 } 402 403 /* 404 * Fall back to reads: 405 */ 406 if (cache_op == -1) 407 cache_op = PERF_COUNT_HW_CACHE_OP_READ; 408 409 /* 410 * Fall back to accesses: 411 */ 412 if (cache_result == -1) 413 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; 414 415 memset(&attr, 0, sizeof(attr)); 416 attr.config = cache_type | (cache_op << 8) | (cache_result << 16); 417 attr.type = PERF_TYPE_HW_CACHE; 418 419 if (head_config) { 420 if (config_attr(&attr, head_config, err, 421 config_term_common)) 422 return -EINVAL; 423 424 if (get_config_terms(head_config, &config_terms)) 425 return -ENOMEM; 426 } 427 428 metric_id = get_config_metric_id(head_config); 429 ret = parse_events__add_cache_hybrid(list, idx, &attr, 430 config_name ? : name, 431 metric_id, 432 &config_terms, 433 &hybrid, parse_state); 434 if (hybrid) 435 goto out_free_terms; 436 437 ret = add_event(list, idx, &attr, config_name ? : name, metric_id, 438 &config_terms); 439 out_free_terms: 440 free_config_terms(&config_terms); 441 return ret; 442 } 443 444 static void tracepoint_error(struct parse_events_error *e, int err, 445 const char *sys, const char *name) 446 { 447 const char *str; 448 char help[BUFSIZ]; 449 450 if (!e) 451 return; 452 453 /* 454 * We get error directly from syscall errno ( > 0), 455 * or from encoded pointer's error ( < 0). 456 */ 457 err = abs(err); 458 459 switch (err) { 460 case EACCES: 461 str = "can't access trace events"; 462 break; 463 case ENOENT: 464 str = "unknown tracepoint"; 465 break; 466 default: 467 str = "failed to add tracepoint"; 468 break; 469 } 470 471 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); 472 parse_events_error__handle(e, 0, strdup(str), strdup(help)); 473 } 474 475 static int add_tracepoint(struct list_head *list, int *idx, 476 const char *sys_name, const char *evt_name, 477 struct parse_events_error *err, 478 struct list_head *head_config) 479 { 480 struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++); 481 482 if (IS_ERR(evsel)) { 483 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name); 484 return PTR_ERR(evsel); 485 } 486 487 if (head_config) { 488 LIST_HEAD(config_terms); 489 490 if (get_config_terms(head_config, &config_terms)) 491 return -ENOMEM; 492 list_splice(&config_terms, &evsel->config_terms); 493 } 494 495 list_add_tail(&evsel->core.node, list); 496 return 0; 497 } 498 499 static int add_tracepoint_multi_event(struct list_head *list, int *idx, 500 const char *sys_name, const char *evt_name, 501 struct parse_events_error *err, 502 struct list_head *head_config) 503 { 504 char *evt_path; 505 struct dirent *evt_ent; 506 DIR *evt_dir; 507 int ret = 0, found = 0; 508 509 evt_path = get_events_file(sys_name); 510 if (!evt_path) { 511 tracepoint_error(err, errno, sys_name, evt_name); 512 return -1; 513 } 514 evt_dir = opendir(evt_path); 515 if (!evt_dir) { 516 put_events_file(evt_path); 517 tracepoint_error(err, errno, sys_name, evt_name); 518 return -1; 519 } 520 521 while (!ret && (evt_ent = readdir(evt_dir))) { 522 if (!strcmp(evt_ent->d_name, ".") 523 || !strcmp(evt_ent->d_name, "..") 524 || !strcmp(evt_ent->d_name, "enable") 525 || !strcmp(evt_ent->d_name, "filter")) 526 continue; 527 528 if (!strglobmatch(evt_ent->d_name, evt_name)) 529 continue; 530 531 found++; 532 533 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, 534 err, head_config); 535 } 536 537 if (!found) { 538 tracepoint_error(err, ENOENT, sys_name, evt_name); 539 ret = -1; 540 } 541 542 put_events_file(evt_path); 543 closedir(evt_dir); 544 return ret; 545 } 546 547 static int add_tracepoint_event(struct list_head *list, int *idx, 548 const char *sys_name, const char *evt_name, 549 struct parse_events_error *err, 550 struct list_head *head_config) 551 { 552 return strpbrk(evt_name, "*?") ? 553 add_tracepoint_multi_event(list, idx, sys_name, evt_name, 554 err, head_config) : 555 add_tracepoint(list, idx, sys_name, evt_name, 556 err, head_config); 557 } 558 559 static int add_tracepoint_multi_sys(struct list_head *list, int *idx, 560 const char *sys_name, const char *evt_name, 561 struct parse_events_error *err, 562 struct list_head *head_config) 563 { 564 struct dirent *events_ent; 565 DIR *events_dir; 566 int ret = 0; 567 568 events_dir = tracing_events__opendir(); 569 if (!events_dir) { 570 tracepoint_error(err, errno, sys_name, evt_name); 571 return -1; 572 } 573 574 while (!ret && (events_ent = readdir(events_dir))) { 575 if (!strcmp(events_ent->d_name, ".") 576 || !strcmp(events_ent->d_name, "..") 577 || !strcmp(events_ent->d_name, "enable") 578 || !strcmp(events_ent->d_name, "header_event") 579 || !strcmp(events_ent->d_name, "header_page")) 580 continue; 581 582 if (!strglobmatch(events_ent->d_name, sys_name)) 583 continue; 584 585 ret = add_tracepoint_event(list, idx, events_ent->d_name, 586 evt_name, err, head_config); 587 } 588 589 closedir(events_dir); 590 return ret; 591 } 592 593 #ifdef HAVE_LIBBPF_SUPPORT 594 struct __add_bpf_event_param { 595 struct parse_events_state *parse_state; 596 struct list_head *list; 597 struct list_head *head_config; 598 }; 599 600 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj, 601 void *_param) 602 { 603 LIST_HEAD(new_evsels); 604 struct __add_bpf_event_param *param = _param; 605 struct parse_events_state *parse_state = param->parse_state; 606 struct list_head *list = param->list; 607 struct evsel *pos; 608 int err; 609 /* 610 * Check if we should add the event, i.e. if it is a TP but starts with a '!', 611 * then don't add the tracepoint, this will be used for something else, like 612 * adding to a BPF_MAP_TYPE_PROG_ARRAY. 613 * 614 * See tools/perf/examples/bpf/augmented_raw_syscalls.c 615 */ 616 if (group[0] == '!') 617 return 0; 618 619 pr_debug("add bpf event %s:%s and attach bpf program %d\n", 620 group, event, fd); 621 622 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group, 623 event, parse_state->error, 624 param->head_config); 625 if (err) { 626 struct evsel *evsel, *tmp; 627 628 pr_debug("Failed to add BPF event %s:%s\n", 629 group, event); 630 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) { 631 list_del_init(&evsel->core.node); 632 evsel__delete(evsel); 633 } 634 return err; 635 } 636 pr_debug("adding %s:%s\n", group, event); 637 638 list_for_each_entry(pos, &new_evsels, core.node) { 639 pr_debug("adding %s:%s to %p\n", 640 group, event, pos); 641 pos->bpf_fd = fd; 642 pos->bpf_obj = obj; 643 } 644 list_splice(&new_evsels, list); 645 return 0; 646 } 647 648 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 649 struct list_head *list, 650 struct bpf_object *obj, 651 struct list_head *head_config) 652 { 653 int err; 654 char errbuf[BUFSIZ]; 655 struct __add_bpf_event_param param = {parse_state, list, head_config}; 656 static bool registered_unprobe_atexit = false; 657 658 if (IS_ERR(obj) || !obj) { 659 snprintf(errbuf, sizeof(errbuf), 660 "Internal error: load bpf obj with NULL"); 661 err = -EINVAL; 662 goto errout; 663 } 664 665 /* 666 * Register atexit handler before calling bpf__probe() so 667 * bpf__probe() don't need to unprobe probe points its already 668 * created when failure. 669 */ 670 if (!registered_unprobe_atexit) { 671 atexit(bpf__clear); 672 registered_unprobe_atexit = true; 673 } 674 675 err = bpf__probe(obj); 676 if (err) { 677 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf)); 678 goto errout; 679 } 680 681 err = bpf__load(obj); 682 if (err) { 683 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf)); 684 goto errout; 685 } 686 687 err = bpf__foreach_event(obj, add_bpf_event, ¶m); 688 if (err) { 689 snprintf(errbuf, sizeof(errbuf), 690 "Attach events in BPF object failed"); 691 goto errout; 692 } 693 694 return 0; 695 errout: 696 parse_events_error__handle(parse_state->error, 0, 697 strdup(errbuf), strdup("(add -v to see detail)")); 698 return err; 699 } 700 701 static int 702 parse_events_config_bpf(struct parse_events_state *parse_state, 703 struct bpf_object *obj, 704 struct list_head *head_config) 705 { 706 struct parse_events_term *term; 707 int error_pos; 708 709 if (!head_config || list_empty(head_config)) 710 return 0; 711 712 list_for_each_entry(term, head_config, list) { 713 int err; 714 715 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) { 716 parse_events_error__handle(parse_state->error, term->err_term, 717 strdup("Invalid config term for BPF object"), 718 NULL); 719 return -EINVAL; 720 } 721 722 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos); 723 if (err) { 724 char errbuf[BUFSIZ]; 725 int idx; 726 727 bpf__strerror_config_obj(obj, term, parse_state->evlist, 728 &error_pos, err, errbuf, 729 sizeof(errbuf)); 730 731 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE) 732 idx = term->err_val; 733 else 734 idx = term->err_term + error_pos; 735 736 parse_events_error__handle(parse_state->error, idx, 737 strdup(errbuf), 738 strdup( 739 "Hint:\tValid config terms:\n" 740 " \tmap:[<arraymap>].value<indices>=[value]\n" 741 " \tmap:[<eventmap>].event<indices>=[event]\n" 742 "\n" 743 " \twhere <indices> is something like [0,3...5] or [all]\n" 744 " \t(add -v to see detail)")); 745 return err; 746 } 747 } 748 return 0; 749 } 750 751 /* 752 * Split config terms: 753 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ... 754 * 'call-graph=fp' is 'evt config', should be applied to each 755 * events in bpf.c. 756 * 'map:array.value[0]=1' is 'obj config', should be processed 757 * with parse_events_config_bpf. 758 * 759 * Move object config terms from the first list to obj_head_config. 760 */ 761 static void 762 split_bpf_config_terms(struct list_head *evt_head_config, 763 struct list_head *obj_head_config) 764 { 765 struct parse_events_term *term, *temp; 766 767 /* 768 * Currently, all possible user config term 769 * belong to bpf object. parse_events__is_hardcoded_term() 770 * happens to be a good flag. 771 * 772 * See parse_events_config_bpf() and 773 * config_term_tracepoint(). 774 */ 775 list_for_each_entry_safe(term, temp, evt_head_config, list) 776 if (!parse_events__is_hardcoded_term(term)) 777 list_move_tail(&term->list, obj_head_config); 778 } 779 780 int parse_events_load_bpf(struct parse_events_state *parse_state, 781 struct list_head *list, 782 char *bpf_file_name, 783 bool source, 784 struct list_head *head_config) 785 { 786 int err; 787 struct bpf_object *obj; 788 LIST_HEAD(obj_head_config); 789 790 if (head_config) 791 split_bpf_config_terms(head_config, &obj_head_config); 792 793 obj = bpf__prepare_load(bpf_file_name, source); 794 if (IS_ERR(obj)) { 795 char errbuf[BUFSIZ]; 796 797 err = PTR_ERR(obj); 798 799 if (err == -ENOTSUP) 800 snprintf(errbuf, sizeof(errbuf), 801 "BPF support is not compiled"); 802 else 803 bpf__strerror_prepare_load(bpf_file_name, 804 source, 805 -err, errbuf, 806 sizeof(errbuf)); 807 808 parse_events_error__handle(parse_state->error, 0, 809 strdup(errbuf), strdup("(add -v to see detail)")); 810 return err; 811 } 812 813 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config); 814 if (err) 815 return err; 816 err = parse_events_config_bpf(parse_state, obj, &obj_head_config); 817 818 /* 819 * Caller doesn't know anything about obj_head_config, 820 * so combine them together again before returning. 821 */ 822 if (head_config) 823 list_splice_tail(&obj_head_config, head_config); 824 return err; 825 } 826 #else // HAVE_LIBBPF_SUPPORT 827 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 828 struct list_head *list __maybe_unused, 829 struct bpf_object *obj __maybe_unused, 830 struct list_head *head_config __maybe_unused) 831 { 832 parse_events_error__handle(parse_state->error, 0, 833 strdup("BPF support is not compiled"), 834 strdup("Make sure libbpf-devel is available at build time.")); 835 return -ENOTSUP; 836 } 837 838 int parse_events_load_bpf(struct parse_events_state *parse_state, 839 struct list_head *list __maybe_unused, 840 char *bpf_file_name __maybe_unused, 841 bool source __maybe_unused, 842 struct list_head *head_config __maybe_unused) 843 { 844 parse_events_error__handle(parse_state->error, 0, 845 strdup("BPF support is not compiled"), 846 strdup("Make sure libbpf-devel is available at build time.")); 847 return -ENOTSUP; 848 } 849 #endif // HAVE_LIBBPF_SUPPORT 850 851 static int 852 parse_breakpoint_type(const char *type, struct perf_event_attr *attr) 853 { 854 int i; 855 856 for (i = 0; i < 3; i++) { 857 if (!type || !type[i]) 858 break; 859 860 #define CHECK_SET_TYPE(bit) \ 861 do { \ 862 if (attr->bp_type & bit) \ 863 return -EINVAL; \ 864 else \ 865 attr->bp_type |= bit; \ 866 } while (0) 867 868 switch (type[i]) { 869 case 'r': 870 CHECK_SET_TYPE(HW_BREAKPOINT_R); 871 break; 872 case 'w': 873 CHECK_SET_TYPE(HW_BREAKPOINT_W); 874 break; 875 case 'x': 876 CHECK_SET_TYPE(HW_BREAKPOINT_X); 877 break; 878 default: 879 return -EINVAL; 880 } 881 } 882 883 #undef CHECK_SET_TYPE 884 885 if (!attr->bp_type) /* Default */ 886 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; 887 888 return 0; 889 } 890 891 int parse_events_add_breakpoint(struct list_head *list, int *idx, 892 u64 addr, char *type, u64 len) 893 { 894 struct perf_event_attr attr; 895 896 memset(&attr, 0, sizeof(attr)); 897 attr.bp_addr = addr; 898 899 if (parse_breakpoint_type(type, &attr)) 900 return -EINVAL; 901 902 /* Provide some defaults if len is not specified */ 903 if (!len) { 904 if (attr.bp_type == HW_BREAKPOINT_X) 905 len = sizeof(long); 906 else 907 len = HW_BREAKPOINT_LEN_4; 908 } 909 910 attr.bp_len = len; 911 912 attr.type = PERF_TYPE_BREAKPOINT; 913 attr.sample_period = 1; 914 915 return add_event(list, idx, &attr, /*name=*/NULL, /*mertic_id=*/NULL, 916 /*config_terms=*/NULL); 917 } 918 919 static int check_type_val(struct parse_events_term *term, 920 struct parse_events_error *err, 921 int type) 922 { 923 if (type == term->type_val) 924 return 0; 925 926 if (err) { 927 parse_events_error__handle(err, term->err_val, 928 type == PARSE_EVENTS__TERM_TYPE_NUM 929 ? strdup("expected numeric value") 930 : strdup("expected string value"), 931 NULL); 932 } 933 return -EINVAL; 934 } 935 936 /* 937 * Update according to parse-events.l 938 */ 939 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = { 940 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>", 941 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config", 942 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1", 943 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2", 944 [PARSE_EVENTS__TERM_TYPE_NAME] = "name", 945 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period", 946 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq", 947 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type", 948 [PARSE_EVENTS__TERM_TYPE_TIME] = "time", 949 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph", 950 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size", 951 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit", 952 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit", 953 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack", 954 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr", 955 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite", 956 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite", 957 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config", 958 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore", 959 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output", 960 [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size", 961 [PARSE_EVENTS__TERM_TYPE_METRIC_ID] = "metric-id", 962 }; 963 964 static bool config_term_shrinked; 965 966 static bool 967 config_term_avail(int term_type, struct parse_events_error *err) 968 { 969 char *err_str; 970 971 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { 972 parse_events_error__handle(err, -1, 973 strdup("Invalid term_type"), NULL); 974 return false; 975 } 976 if (!config_term_shrinked) 977 return true; 978 979 switch (term_type) { 980 case PARSE_EVENTS__TERM_TYPE_CONFIG: 981 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 982 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 983 case PARSE_EVENTS__TERM_TYPE_NAME: 984 case PARSE_EVENTS__TERM_TYPE_METRIC_ID: 985 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 986 case PARSE_EVENTS__TERM_TYPE_PERCORE: 987 return true; 988 default: 989 if (!err) 990 return false; 991 992 /* term_type is validated so indexing is safe */ 993 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'", 994 config_term_names[term_type]) >= 0) 995 parse_events_error__handle(err, -1, err_str, NULL); 996 return false; 997 } 998 } 999 1000 void parse_events__shrink_config_terms(void) 1001 { 1002 config_term_shrinked = true; 1003 } 1004 1005 static int config_term_common(struct perf_event_attr *attr, 1006 struct parse_events_term *term, 1007 struct parse_events_error *err) 1008 { 1009 #define CHECK_TYPE_VAL(type) \ 1010 do { \ 1011 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \ 1012 return -EINVAL; \ 1013 } while (0) 1014 1015 switch (term->type_term) { 1016 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1017 CHECK_TYPE_VAL(NUM); 1018 attr->config = term->val.num; 1019 break; 1020 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 1021 CHECK_TYPE_VAL(NUM); 1022 attr->config1 = term->val.num; 1023 break; 1024 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 1025 CHECK_TYPE_VAL(NUM); 1026 attr->config2 = term->val.num; 1027 break; 1028 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1029 CHECK_TYPE_VAL(NUM); 1030 break; 1031 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1032 CHECK_TYPE_VAL(NUM); 1033 break; 1034 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1035 CHECK_TYPE_VAL(STR); 1036 if (strcmp(term->val.str, "no") && 1037 parse_branch_str(term->val.str, 1038 &attr->branch_sample_type)) { 1039 parse_events_error__handle(err, term->err_val, 1040 strdup("invalid branch sample type"), 1041 NULL); 1042 return -EINVAL; 1043 } 1044 break; 1045 case PARSE_EVENTS__TERM_TYPE_TIME: 1046 CHECK_TYPE_VAL(NUM); 1047 if (term->val.num > 1) { 1048 parse_events_error__handle(err, term->err_val, 1049 strdup("expected 0 or 1"), 1050 NULL); 1051 return -EINVAL; 1052 } 1053 break; 1054 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1055 CHECK_TYPE_VAL(STR); 1056 break; 1057 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1058 CHECK_TYPE_VAL(NUM); 1059 break; 1060 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1061 CHECK_TYPE_VAL(NUM); 1062 break; 1063 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1064 CHECK_TYPE_VAL(NUM); 1065 break; 1066 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1067 CHECK_TYPE_VAL(NUM); 1068 break; 1069 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1070 CHECK_TYPE_VAL(NUM); 1071 break; 1072 case PARSE_EVENTS__TERM_TYPE_NAME: 1073 CHECK_TYPE_VAL(STR); 1074 break; 1075 case PARSE_EVENTS__TERM_TYPE_METRIC_ID: 1076 CHECK_TYPE_VAL(STR); 1077 break; 1078 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1079 CHECK_TYPE_VAL(NUM); 1080 break; 1081 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1082 CHECK_TYPE_VAL(NUM); 1083 break; 1084 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1085 CHECK_TYPE_VAL(NUM); 1086 if ((unsigned int)term->val.num > 1) { 1087 parse_events_error__handle(err, term->err_val, 1088 strdup("expected 0 or 1"), 1089 NULL); 1090 return -EINVAL; 1091 } 1092 break; 1093 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1094 CHECK_TYPE_VAL(NUM); 1095 break; 1096 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1097 CHECK_TYPE_VAL(NUM); 1098 if (term->val.num > UINT_MAX) { 1099 parse_events_error__handle(err, term->err_val, 1100 strdup("too big"), 1101 NULL); 1102 return -EINVAL; 1103 } 1104 break; 1105 default: 1106 parse_events_error__handle(err, term->err_term, 1107 strdup("unknown term"), 1108 parse_events_formats_error_string(NULL)); 1109 return -EINVAL; 1110 } 1111 1112 /* 1113 * Check term availability after basic checking so 1114 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered. 1115 * 1116 * If check availability at the entry of this function, 1117 * user will see "'<sysfs term>' is not usable in 'perf stat'" 1118 * if an invalid config term is provided for legacy events 1119 * (for example, instructions/badterm/...), which is confusing. 1120 */ 1121 if (!config_term_avail(term->type_term, err)) 1122 return -EINVAL; 1123 return 0; 1124 #undef CHECK_TYPE_VAL 1125 } 1126 1127 static int config_term_pmu(struct perf_event_attr *attr, 1128 struct parse_events_term *term, 1129 struct parse_events_error *err) 1130 { 1131 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER || 1132 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG) 1133 /* 1134 * Always succeed for sysfs terms, as we dont know 1135 * at this point what type they need to have. 1136 */ 1137 return 0; 1138 else 1139 return config_term_common(attr, term, err); 1140 } 1141 1142 static int config_term_tracepoint(struct perf_event_attr *attr, 1143 struct parse_events_term *term, 1144 struct parse_events_error *err) 1145 { 1146 switch (term->type_term) { 1147 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1148 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1149 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1150 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1151 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1152 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1153 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1154 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1155 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1156 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1157 return config_term_common(attr, term, err); 1158 default: 1159 if (err) { 1160 parse_events_error__handle(err, term->err_term, 1161 strdup("unknown term"), 1162 strdup("valid terms: call-graph,stack-size\n")); 1163 } 1164 return -EINVAL; 1165 } 1166 1167 return 0; 1168 } 1169 1170 static int config_attr(struct perf_event_attr *attr, 1171 struct list_head *head, 1172 struct parse_events_error *err, 1173 config_term_func_t config_term) 1174 { 1175 struct parse_events_term *term; 1176 1177 list_for_each_entry(term, head, list) 1178 if (config_term(attr, term, err)) 1179 return -EINVAL; 1180 1181 return 0; 1182 } 1183 1184 static int get_config_terms(struct list_head *head_config, 1185 struct list_head *head_terms __maybe_unused) 1186 { 1187 #define ADD_CONFIG_TERM(__type, __weak) \ 1188 struct evsel_config_term *__t; \ 1189 \ 1190 __t = zalloc(sizeof(*__t)); \ 1191 if (!__t) \ 1192 return -ENOMEM; \ 1193 \ 1194 INIT_LIST_HEAD(&__t->list); \ 1195 __t->type = EVSEL__CONFIG_TERM_ ## __type; \ 1196 __t->weak = __weak; \ 1197 list_add_tail(&__t->list, head_terms) 1198 1199 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \ 1200 do { \ 1201 ADD_CONFIG_TERM(__type, __weak); \ 1202 __t->val.__name = __val; \ 1203 } while (0) 1204 1205 #define ADD_CONFIG_TERM_STR(__type, __val, __weak) \ 1206 do { \ 1207 ADD_CONFIG_TERM(__type, __weak); \ 1208 __t->val.str = strdup(__val); \ 1209 if (!__t->val.str) { \ 1210 zfree(&__t); \ 1211 return -ENOMEM; \ 1212 } \ 1213 __t->free_str = true; \ 1214 } while (0) 1215 1216 struct parse_events_term *term; 1217 1218 list_for_each_entry(term, head_config, list) { 1219 switch (term->type_term) { 1220 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1221 ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak); 1222 break; 1223 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1224 ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak); 1225 break; 1226 case PARSE_EVENTS__TERM_TYPE_TIME: 1227 ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak); 1228 break; 1229 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1230 ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak); 1231 break; 1232 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1233 ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak); 1234 break; 1235 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1236 ADD_CONFIG_TERM_VAL(STACK_USER, stack_user, 1237 term->val.num, term->weak); 1238 break; 1239 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1240 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1241 term->val.num ? 1 : 0, term->weak); 1242 break; 1243 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1244 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1245 term->val.num ? 0 : 1, term->weak); 1246 break; 1247 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1248 ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack, 1249 term->val.num, term->weak); 1250 break; 1251 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1252 ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events, 1253 term->val.num, term->weak); 1254 break; 1255 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1256 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1257 term->val.num ? 1 : 0, term->weak); 1258 break; 1259 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1260 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1261 term->val.num ? 0 : 1, term->weak); 1262 break; 1263 case PARSE_EVENTS__TERM_TYPE_DRV_CFG: 1264 ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak); 1265 break; 1266 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1267 ADD_CONFIG_TERM_VAL(PERCORE, percore, 1268 term->val.num ? true : false, term->weak); 1269 break; 1270 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1271 ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output, 1272 term->val.num ? 1 : 0, term->weak); 1273 break; 1274 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1275 ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size, 1276 term->val.num, term->weak); 1277 break; 1278 default: 1279 break; 1280 } 1281 } 1282 return 0; 1283 } 1284 1285 /* 1286 * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for 1287 * each bit of attr->config that the user has changed. 1288 */ 1289 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config, 1290 struct list_head *head_terms) 1291 { 1292 struct parse_events_term *term; 1293 u64 bits = 0; 1294 int type; 1295 1296 list_for_each_entry(term, head_config, list) { 1297 switch (term->type_term) { 1298 case PARSE_EVENTS__TERM_TYPE_USER: 1299 type = perf_pmu__format_type(&pmu->format, term->config); 1300 if (type != PERF_PMU_FORMAT_VALUE_CONFIG) 1301 continue; 1302 bits |= perf_pmu__format_bits(&pmu->format, term->config); 1303 break; 1304 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1305 bits = ~(u64)0; 1306 break; 1307 default: 1308 break; 1309 } 1310 } 1311 1312 if (bits) 1313 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false); 1314 1315 #undef ADD_CONFIG_TERM 1316 return 0; 1317 } 1318 1319 int parse_events_add_tracepoint(struct list_head *list, int *idx, 1320 const char *sys, const char *event, 1321 struct parse_events_error *err, 1322 struct list_head *head_config) 1323 { 1324 if (head_config) { 1325 struct perf_event_attr attr; 1326 1327 if (config_attr(&attr, head_config, err, 1328 config_term_tracepoint)) 1329 return -EINVAL; 1330 } 1331 1332 if (strpbrk(sys, "*?")) 1333 return add_tracepoint_multi_sys(list, idx, sys, event, 1334 err, head_config); 1335 else 1336 return add_tracepoint_event(list, idx, sys, event, 1337 err, head_config); 1338 } 1339 1340 int parse_events_add_numeric(struct parse_events_state *parse_state, 1341 struct list_head *list, 1342 u32 type, u64 config, 1343 struct list_head *head_config) 1344 { 1345 struct perf_event_attr attr; 1346 LIST_HEAD(config_terms); 1347 const char *name, *metric_id; 1348 bool hybrid; 1349 int ret; 1350 1351 memset(&attr, 0, sizeof(attr)); 1352 attr.type = type; 1353 attr.config = config; 1354 1355 if (head_config) { 1356 if (config_attr(&attr, head_config, parse_state->error, 1357 config_term_common)) 1358 return -EINVAL; 1359 1360 if (get_config_terms(head_config, &config_terms)) 1361 return -ENOMEM; 1362 } 1363 1364 name = get_config_name(head_config); 1365 metric_id = get_config_metric_id(head_config); 1366 ret = parse_events__add_numeric_hybrid(parse_state, list, &attr, 1367 name, metric_id, 1368 &config_terms, &hybrid); 1369 if (hybrid) 1370 goto out_free_terms; 1371 1372 ret = add_event(list, &parse_state->idx, &attr, name, metric_id, 1373 &config_terms); 1374 out_free_terms: 1375 free_config_terms(&config_terms); 1376 return ret; 1377 } 1378 1379 int parse_events_add_tool(struct parse_events_state *parse_state, 1380 struct list_head *list, 1381 int tool_event) 1382 { 1383 return add_event_tool(list, &parse_state->idx, tool_event); 1384 } 1385 1386 static bool config_term_percore(struct list_head *config_terms) 1387 { 1388 struct evsel_config_term *term; 1389 1390 list_for_each_entry(term, config_terms, list) { 1391 if (term->type == EVSEL__CONFIG_TERM_PERCORE) 1392 return term->val.percore; 1393 } 1394 1395 return false; 1396 } 1397 1398 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state, 1399 struct list_head *list, char *name, 1400 struct list_head *head_config) 1401 { 1402 struct parse_events_term *term; 1403 int ret = -1; 1404 1405 if (parse_state->fake_pmu || !head_config || list_empty(head_config) || 1406 !perf_pmu__is_hybrid(name)) { 1407 return -1; 1408 } 1409 1410 /* 1411 * More than one term in list. 1412 */ 1413 if (head_config->next && head_config->next->next != head_config) 1414 return -1; 1415 1416 term = list_first_entry(head_config, struct parse_events_term, list); 1417 if (term && term->config && strcmp(term->config, "event")) { 1418 ret = parse_events__with_hybrid_pmu(parse_state, term->config, 1419 name, list); 1420 } 1421 1422 return ret; 1423 } 1424 1425 int parse_events_add_pmu(struct parse_events_state *parse_state, 1426 struct list_head *list, char *name, 1427 struct list_head *head_config, 1428 bool auto_merge_stats, 1429 bool use_alias) 1430 { 1431 struct perf_event_attr attr; 1432 struct perf_pmu_info info; 1433 struct perf_pmu *pmu; 1434 struct evsel *evsel; 1435 struct parse_events_error *err = parse_state->error; 1436 bool use_uncore_alias; 1437 LIST_HEAD(config_terms); 1438 1439 pmu = parse_state->fake_pmu ?: perf_pmu__find(name); 1440 1441 if (verbose > 1 && !(pmu && pmu->selectable)) { 1442 fprintf(stderr, "Attempting to add event pmu '%s' with '", 1443 name); 1444 if (head_config) { 1445 struct parse_events_term *term; 1446 1447 list_for_each_entry(term, head_config, list) { 1448 fprintf(stderr, "%s,", term->config); 1449 } 1450 } 1451 fprintf(stderr, "' that may result in non-fatal errors\n"); 1452 } 1453 1454 if (!pmu) { 1455 char *err_str; 1456 1457 if (asprintf(&err_str, 1458 "Cannot find PMU `%s'. Missing kernel support?", 1459 name) >= 0) 1460 parse_events_error__handle(err, 0, err_str, NULL); 1461 return -EINVAL; 1462 } 1463 1464 if (pmu->default_config) { 1465 memcpy(&attr, pmu->default_config, 1466 sizeof(struct perf_event_attr)); 1467 } else { 1468 memset(&attr, 0, sizeof(attr)); 1469 } 1470 1471 use_uncore_alias = (pmu->is_uncore && use_alias); 1472 1473 if (!head_config) { 1474 attr.type = pmu->type; 1475 evsel = __add_event(list, &parse_state->idx, &attr, 1476 /*init_attr=*/true, /*name=*/NULL, 1477 /*metric_id=*/NULL, pmu, 1478 /*config_terms=*/NULL, auto_merge_stats, 1479 /*cpu_list=*/NULL); 1480 if (evsel) { 1481 evsel->pmu_name = name ? strdup(name) : NULL; 1482 evsel->use_uncore_alias = use_uncore_alias; 1483 return 0; 1484 } else { 1485 return -ENOMEM; 1486 } 1487 } 1488 1489 if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info)) 1490 return -EINVAL; 1491 1492 if (verbose > 1) { 1493 fprintf(stderr, "After aliases, add event pmu '%s' with '", 1494 name); 1495 if (head_config) { 1496 struct parse_events_term *term; 1497 1498 list_for_each_entry(term, head_config, list) { 1499 fprintf(stderr, "%s,", term->config); 1500 } 1501 } 1502 fprintf(stderr, "' that may result in non-fatal errors\n"); 1503 } 1504 1505 /* 1506 * Configure hardcoded terms first, no need to check 1507 * return value when called with fail == 0 ;) 1508 */ 1509 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu)) 1510 return -EINVAL; 1511 1512 if (get_config_terms(head_config, &config_terms)) 1513 return -ENOMEM; 1514 1515 /* 1516 * When using default config, record which bits of attr->config were 1517 * changed by the user. 1518 */ 1519 if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms)) 1520 return -ENOMEM; 1521 1522 if (!parse_events__inside_hybrid_pmu(parse_state, list, name, 1523 head_config)) { 1524 return 0; 1525 } 1526 1527 if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) { 1528 free_config_terms(&config_terms); 1529 return -EINVAL; 1530 } 1531 1532 evsel = __add_event(list, &parse_state->idx, &attr, /*init_attr=*/true, 1533 get_config_name(head_config), 1534 get_config_metric_id(head_config), pmu, 1535 &config_terms, auto_merge_stats, /*cpu_list=*/NULL); 1536 if (!evsel) 1537 return -ENOMEM; 1538 1539 if (evsel->name) 1540 evsel->use_config_name = true; 1541 1542 evsel->pmu_name = name ? strdup(name) : NULL; 1543 evsel->use_uncore_alias = use_uncore_alias; 1544 evsel->percore = config_term_percore(&evsel->config_terms); 1545 1546 if (parse_state->fake_pmu) 1547 return 0; 1548 1549 free((char *)evsel->unit); 1550 evsel->unit = strdup(info.unit); 1551 evsel->scale = info.scale; 1552 evsel->per_pkg = info.per_pkg; 1553 evsel->snapshot = info.snapshot; 1554 evsel->metric_expr = info.metric_expr; 1555 evsel->metric_name = info.metric_name; 1556 return 0; 1557 } 1558 1559 int parse_events_multi_pmu_add(struct parse_events_state *parse_state, 1560 char *str, struct list_head *head, 1561 struct list_head **listp) 1562 { 1563 struct parse_events_term *term; 1564 struct list_head *list = NULL; 1565 struct list_head *orig_head = NULL; 1566 struct perf_pmu *pmu = NULL; 1567 int ok = 0; 1568 char *config; 1569 1570 *listp = NULL; 1571 1572 if (!head) { 1573 head = malloc(sizeof(struct list_head)); 1574 if (!head) 1575 goto out_err; 1576 1577 INIT_LIST_HEAD(head); 1578 } 1579 config = strdup(str); 1580 if (!config) 1581 goto out_err; 1582 1583 if (parse_events_term__num(&term, 1584 PARSE_EVENTS__TERM_TYPE_USER, 1585 config, 1, false, &config, 1586 NULL) < 0) { 1587 free(config); 1588 goto out_err; 1589 } 1590 list_add_tail(&term->list, head); 1591 1592 /* Add it for all PMUs that support the alias */ 1593 list = malloc(sizeof(struct list_head)); 1594 if (!list) 1595 goto out_err; 1596 1597 INIT_LIST_HEAD(list); 1598 1599 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1600 struct perf_pmu_alias *alias; 1601 1602 list_for_each_entry(alias, &pmu->aliases, list) { 1603 if (!strcasecmp(alias->name, str)) { 1604 parse_events_copy_term_list(head, &orig_head); 1605 if (!parse_events_add_pmu(parse_state, list, 1606 pmu->name, orig_head, 1607 true, true)) { 1608 pr_debug("%s -> %s/%s/\n", str, 1609 pmu->name, alias->str); 1610 ok++; 1611 } 1612 parse_events_terms__delete(orig_head); 1613 } 1614 } 1615 } 1616 1617 if (parse_state->fake_pmu) { 1618 if (!parse_events_add_pmu(parse_state, list, str, head, 1619 true, true)) { 1620 pr_debug("%s -> %s/%s/\n", str, "fake_pmu", str); 1621 ok++; 1622 } 1623 } 1624 1625 out_err: 1626 if (ok) 1627 *listp = list; 1628 else 1629 free(list); 1630 1631 parse_events_terms__delete(head); 1632 return ok ? 0 : -1; 1633 } 1634 1635 int parse_events__modifier_group(struct list_head *list, 1636 char *event_mod) 1637 { 1638 return parse_events__modifier_event(list, event_mod, true); 1639 } 1640 1641 /* 1642 * Check if the two uncore PMUs are from the same uncore block 1643 * The format of the uncore PMU name is uncore_#blockname_#pmuidx 1644 */ 1645 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b) 1646 { 1647 char *end_a, *end_b; 1648 1649 end_a = strrchr(pmu_name_a, '_'); 1650 end_b = strrchr(pmu_name_b, '_'); 1651 1652 if (!end_a || !end_b) 1653 return false; 1654 1655 if ((end_a - pmu_name_a) != (end_b - pmu_name_b)) 1656 return false; 1657 1658 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0); 1659 } 1660 1661 static int 1662 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list, 1663 struct parse_events_state *parse_state) 1664 { 1665 struct evsel *evsel, *leader; 1666 uintptr_t *leaders; 1667 bool is_leader = true; 1668 int i, nr_pmu = 0, total_members, ret = 0; 1669 1670 leader = list_first_entry(list, struct evsel, core.node); 1671 evsel = list_last_entry(list, struct evsel, core.node); 1672 total_members = evsel->core.idx - leader->core.idx + 1; 1673 1674 leaders = calloc(total_members, sizeof(uintptr_t)); 1675 if (WARN_ON(!leaders)) 1676 return 0; 1677 1678 /* 1679 * Going through the whole group and doing sanity check. 1680 * All members must use alias, and be from the same uncore block. 1681 * Also, storing the leader events in an array. 1682 */ 1683 __evlist__for_each_entry(list, evsel) { 1684 1685 /* Only split the uncore group which members use alias */ 1686 if (!evsel->use_uncore_alias) 1687 goto out; 1688 1689 /* The events must be from the same uncore block */ 1690 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name)) 1691 goto out; 1692 1693 if (!is_leader) 1694 continue; 1695 /* 1696 * If the event's PMU name starts to repeat, it must be a new 1697 * event. That can be used to distinguish the leader from 1698 * other members, even they have the same event name. 1699 */ 1700 if ((leader != evsel) && 1701 !strcmp(leader->pmu_name, evsel->pmu_name)) { 1702 is_leader = false; 1703 continue; 1704 } 1705 1706 /* Store the leader event for each PMU */ 1707 leaders[nr_pmu++] = (uintptr_t) evsel; 1708 } 1709 1710 /* only one event alias */ 1711 if (nr_pmu == total_members) { 1712 parse_state->nr_groups--; 1713 goto handled; 1714 } 1715 1716 /* 1717 * An uncore event alias is a joint name which means the same event 1718 * runs on all PMUs of a block. 1719 * Perf doesn't support mixed events from different PMUs in the same 1720 * group. The big group has to be split into multiple small groups 1721 * which only include the events from the same PMU. 1722 * 1723 * Here the uncore event aliases must be from the same uncore block. 1724 * The number of PMUs must be same for each alias. The number of new 1725 * small groups equals to the number of PMUs. 1726 * Setting the leader event for corresponding members in each group. 1727 */ 1728 i = 0; 1729 __evlist__for_each_entry(list, evsel) { 1730 if (i >= nr_pmu) 1731 i = 0; 1732 evsel__set_leader(evsel, (struct evsel *) leaders[i++]); 1733 } 1734 1735 /* The number of members and group name are same for each group */ 1736 for (i = 0; i < nr_pmu; i++) { 1737 evsel = (struct evsel *) leaders[i]; 1738 evsel->core.nr_members = total_members / nr_pmu; 1739 evsel->group_name = name ? strdup(name) : NULL; 1740 } 1741 1742 /* Take the new small groups into account */ 1743 parse_state->nr_groups += nr_pmu - 1; 1744 1745 handled: 1746 ret = 1; 1747 out: 1748 free(leaders); 1749 return ret; 1750 } 1751 1752 __weak struct evsel *arch_evlist__leader(struct list_head *list) 1753 { 1754 return list_first_entry(list, struct evsel, core.node); 1755 } 1756 1757 void parse_events__set_leader(char *name, struct list_head *list, 1758 struct parse_events_state *parse_state) 1759 { 1760 struct evsel *leader; 1761 1762 if (list_empty(list)) { 1763 WARN_ONCE(true, "WARNING: failed to set leader: empty list"); 1764 return; 1765 } 1766 1767 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) 1768 return; 1769 1770 leader = arch_evlist__leader(list); 1771 __perf_evlist__set_leader(list, &leader->core); 1772 leader->group_name = name ? strdup(name) : NULL; 1773 list_move(&leader->core.node, list); 1774 } 1775 1776 /* list_event is assumed to point to malloc'ed memory */ 1777 void parse_events_update_lists(struct list_head *list_event, 1778 struct list_head *list_all) 1779 { 1780 /* 1781 * Called for single event definition. Update the 1782 * 'all event' list, and reinit the 'single event' 1783 * list, for next event definition. 1784 */ 1785 list_splice_tail(list_event, list_all); 1786 free(list_event); 1787 } 1788 1789 struct event_modifier { 1790 int eu; 1791 int ek; 1792 int eh; 1793 int eH; 1794 int eG; 1795 int eI; 1796 int precise; 1797 int precise_max; 1798 int exclude_GH; 1799 int sample_read; 1800 int pinned; 1801 int weak; 1802 int exclusive; 1803 int bpf_counter; 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 int bpf_counter = 0; 1825 1826 memset(mod, 0, sizeof(*mod)); 1827 1828 while (*str) { 1829 if (*str == 'u') { 1830 if (!exclude) 1831 exclude = eu = ek = eh = 1; 1832 if (!exclude_GH && !perf_guest) 1833 eG = 1; 1834 eu = 0; 1835 } else if (*str == 'k') { 1836 if (!exclude) 1837 exclude = eu = ek = eh = 1; 1838 ek = 0; 1839 } else if (*str == 'h') { 1840 if (!exclude) 1841 exclude = eu = ek = eh = 1; 1842 eh = 0; 1843 } else if (*str == 'G') { 1844 if (!exclude_GH) 1845 exclude_GH = eG = eH = 1; 1846 eG = 0; 1847 } else if (*str == 'H') { 1848 if (!exclude_GH) 1849 exclude_GH = eG = eH = 1; 1850 eH = 0; 1851 } else if (*str == 'I') { 1852 eI = 1; 1853 } else if (*str == 'p') { 1854 precise++; 1855 /* use of precise requires exclude_guest */ 1856 if (!exclude_GH) 1857 eG = 1; 1858 } else if (*str == 'P') { 1859 precise_max = 1; 1860 } else if (*str == 'S') { 1861 sample_read = 1; 1862 } else if (*str == 'D') { 1863 pinned = 1; 1864 } else if (*str == 'e') { 1865 exclusive = 1; 1866 } else if (*str == 'W') { 1867 weak = 1; 1868 } else if (*str == 'b') { 1869 bpf_counter = 1; 1870 } else 1871 break; 1872 1873 ++str; 1874 } 1875 1876 /* 1877 * precise ip: 1878 * 1879 * 0 - SAMPLE_IP can have arbitrary skid 1880 * 1 - SAMPLE_IP must have constant skid 1881 * 2 - SAMPLE_IP requested to have 0 skid 1882 * 3 - SAMPLE_IP must have 0 skid 1883 * 1884 * See also PERF_RECORD_MISC_EXACT_IP 1885 */ 1886 if (precise > 3) 1887 return -EINVAL; 1888 1889 mod->eu = eu; 1890 mod->ek = ek; 1891 mod->eh = eh; 1892 mod->eH = eH; 1893 mod->eG = eG; 1894 mod->eI = eI; 1895 mod->precise = precise; 1896 mod->precise_max = precise_max; 1897 mod->exclude_GH = exclude_GH; 1898 mod->sample_read = sample_read; 1899 mod->pinned = pinned; 1900 mod->weak = weak; 1901 mod->bpf_counter = bpf_counter; 1902 mod->exclusive = exclusive; 1903 1904 return 0; 1905 } 1906 1907 /* 1908 * Basic modifier sanity check to validate it contains only one 1909 * instance of any modifier (apart from 'p') present. 1910 */ 1911 static int check_modifier(char *str) 1912 { 1913 char *p = str; 1914 1915 /* The sizeof includes 0 byte as well. */ 1916 if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1)) 1917 return -1; 1918 1919 while (*p) { 1920 if (*p != 'p' && strchr(p + 1, *p)) 1921 return -1; 1922 p++; 1923 } 1924 1925 return 0; 1926 } 1927 1928 int parse_events__modifier_event(struct list_head *list, char *str, bool add) 1929 { 1930 struct evsel *evsel; 1931 struct event_modifier mod; 1932 1933 if (str == NULL) 1934 return 0; 1935 1936 if (check_modifier(str)) 1937 return -EINVAL; 1938 1939 if (!add && get_event_modifier(&mod, str, NULL)) 1940 return -EINVAL; 1941 1942 __evlist__for_each_entry(list, evsel) { 1943 if (add && get_event_modifier(&mod, str, evsel)) 1944 return -EINVAL; 1945 1946 evsel->core.attr.exclude_user = mod.eu; 1947 evsel->core.attr.exclude_kernel = mod.ek; 1948 evsel->core.attr.exclude_hv = mod.eh; 1949 evsel->core.attr.precise_ip = mod.precise; 1950 evsel->core.attr.exclude_host = mod.eH; 1951 evsel->core.attr.exclude_guest = mod.eG; 1952 evsel->core.attr.exclude_idle = mod.eI; 1953 evsel->exclude_GH = mod.exclude_GH; 1954 evsel->sample_read = mod.sample_read; 1955 evsel->precise_max = mod.precise_max; 1956 evsel->weak_group = mod.weak; 1957 evsel->bpf_counter = mod.bpf_counter; 1958 1959 if (evsel__is_group_leader(evsel)) { 1960 evsel->core.attr.pinned = mod.pinned; 1961 evsel->core.attr.exclusive = mod.exclusive; 1962 } 1963 } 1964 1965 return 0; 1966 } 1967 1968 int parse_events_name(struct list_head *list, const char *name) 1969 { 1970 struct evsel *evsel; 1971 1972 __evlist__for_each_entry(list, evsel) { 1973 if (!evsel->name) 1974 evsel->name = strdup(name); 1975 } 1976 1977 return 0; 1978 } 1979 1980 static int 1981 comp_pmu(const void *p1, const void *p2) 1982 { 1983 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; 1984 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; 1985 1986 return strcasecmp(pmu1->symbol, pmu2->symbol); 1987 } 1988 1989 static void perf_pmu__parse_cleanup(void) 1990 { 1991 if (perf_pmu_events_list_num > 0) { 1992 struct perf_pmu_event_symbol *p; 1993 int i; 1994 1995 for (i = 0; i < perf_pmu_events_list_num; i++) { 1996 p = perf_pmu_events_list + i; 1997 zfree(&p->symbol); 1998 } 1999 zfree(&perf_pmu_events_list); 2000 perf_pmu_events_list_num = 0; 2001 } 2002 } 2003 2004 #define SET_SYMBOL(str, stype) \ 2005 do { \ 2006 p->symbol = str; \ 2007 if (!p->symbol) \ 2008 goto err; \ 2009 p->type = stype; \ 2010 } while (0) 2011 2012 /* 2013 * Read the pmu events list from sysfs 2014 * Save it into perf_pmu_events_list 2015 */ 2016 static void perf_pmu__parse_init(void) 2017 { 2018 2019 struct perf_pmu *pmu = NULL; 2020 struct perf_pmu_alias *alias; 2021 int len = 0; 2022 2023 pmu = NULL; 2024 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2025 list_for_each_entry(alias, &pmu->aliases, list) { 2026 char *tmp = strchr(alias->name, '-'); 2027 2028 if (tmp) { 2029 char *tmp2 = NULL; 2030 2031 tmp2 = strchr(tmp + 1, '-'); 2032 len++; 2033 if (tmp2) 2034 len++; 2035 } 2036 2037 len++; 2038 } 2039 } 2040 2041 if (len == 0) { 2042 perf_pmu_events_list_num = -1; 2043 return; 2044 } 2045 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); 2046 if (!perf_pmu_events_list) 2047 return; 2048 perf_pmu_events_list_num = len; 2049 2050 len = 0; 2051 pmu = NULL; 2052 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2053 list_for_each_entry(alias, &pmu->aliases, list) { 2054 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; 2055 char *tmp = strchr(alias->name, '-'); 2056 char *tmp2 = NULL; 2057 2058 if (tmp) 2059 tmp2 = strchr(tmp + 1, '-'); 2060 if (tmp2) { 2061 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 2062 PMU_EVENT_SYMBOL_PREFIX); 2063 p++; 2064 tmp++; 2065 SET_SYMBOL(strndup(tmp, tmp2 - tmp), PMU_EVENT_SYMBOL_SUFFIX); 2066 p++; 2067 SET_SYMBOL(strdup(++tmp2), PMU_EVENT_SYMBOL_SUFFIX2); 2068 len += 3; 2069 } else if (tmp) { 2070 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 2071 PMU_EVENT_SYMBOL_PREFIX); 2072 p++; 2073 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); 2074 len += 2; 2075 } else { 2076 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); 2077 len++; 2078 } 2079 } 2080 } 2081 qsort(perf_pmu_events_list, len, 2082 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2083 2084 return; 2085 err: 2086 perf_pmu__parse_cleanup(); 2087 } 2088 2089 /* 2090 * This function injects special term in 2091 * perf_pmu_events_list so the test code 2092 * can check on this functionality. 2093 */ 2094 int perf_pmu__test_parse_init(void) 2095 { 2096 struct perf_pmu_event_symbol *list, *tmp, symbols[] = { 2097 {(char *)"read", PMU_EVENT_SYMBOL}, 2098 {(char *)"event", PMU_EVENT_SYMBOL_PREFIX}, 2099 {(char *)"two", PMU_EVENT_SYMBOL_SUFFIX}, 2100 {(char *)"hyphen", PMU_EVENT_SYMBOL_SUFFIX}, 2101 {(char *)"hyph", PMU_EVENT_SYMBOL_SUFFIX2}, 2102 }; 2103 unsigned long i, j; 2104 2105 tmp = list = malloc(sizeof(*list) * ARRAY_SIZE(symbols)); 2106 if (!list) 2107 return -ENOMEM; 2108 2109 for (i = 0; i < ARRAY_SIZE(symbols); i++, tmp++) { 2110 tmp->type = symbols[i].type; 2111 tmp->symbol = strdup(symbols[i].symbol); 2112 if (!tmp->symbol) 2113 goto err_free; 2114 } 2115 2116 perf_pmu_events_list = list; 2117 perf_pmu_events_list_num = ARRAY_SIZE(symbols); 2118 2119 qsort(perf_pmu_events_list, ARRAY_SIZE(symbols), 2120 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2121 return 0; 2122 2123 err_free: 2124 for (j = 0, tmp = list; j < i; j++, tmp++) 2125 free(tmp->symbol); 2126 free(list); 2127 return -ENOMEM; 2128 } 2129 2130 enum perf_pmu_event_symbol_type 2131 perf_pmu__parse_check(const char *name) 2132 { 2133 struct perf_pmu_event_symbol p, *r; 2134 2135 /* scan kernel pmu events from sysfs if needed */ 2136 if (perf_pmu_events_list_num == 0) 2137 perf_pmu__parse_init(); 2138 /* 2139 * name "cpu" could be prefix of cpu-cycles or cpu// events. 2140 * cpu-cycles has been handled by hardcode. 2141 * So it must be cpu// events, not kernel pmu event. 2142 */ 2143 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) 2144 return PMU_EVENT_SYMBOL_ERR; 2145 2146 p.symbol = strdup(name); 2147 r = bsearch(&p, perf_pmu_events_list, 2148 (size_t) perf_pmu_events_list_num, 2149 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2150 zfree(&p.symbol); 2151 return r ? r->type : PMU_EVENT_SYMBOL_ERR; 2152 } 2153 2154 static int parse_events__scanner(const char *str, 2155 struct parse_events_state *parse_state) 2156 { 2157 YY_BUFFER_STATE buffer; 2158 void *scanner; 2159 int ret; 2160 2161 ret = parse_events_lex_init_extra(parse_state, &scanner); 2162 if (ret) 2163 return ret; 2164 2165 buffer = parse_events__scan_string(str, scanner); 2166 2167 #ifdef PARSER_DEBUG 2168 parse_events_debug = 1; 2169 parse_events_set_debug(1, scanner); 2170 #endif 2171 ret = parse_events_parse(parse_state, scanner); 2172 2173 parse_events__flush_buffer(buffer, scanner); 2174 parse_events__delete_buffer(buffer, scanner); 2175 parse_events_lex_destroy(scanner); 2176 return ret; 2177 } 2178 2179 /* 2180 * parse event config string, return a list of event terms. 2181 */ 2182 int parse_events_terms(struct list_head *terms, const char *str) 2183 { 2184 struct parse_events_state parse_state = { 2185 .terms = NULL, 2186 .stoken = PE_START_TERMS, 2187 }; 2188 int ret; 2189 2190 ret = parse_events__scanner(str, &parse_state); 2191 perf_pmu__parse_cleanup(); 2192 2193 if (!ret) { 2194 list_splice(parse_state.terms, terms); 2195 zfree(&parse_state.terms); 2196 return 0; 2197 } 2198 2199 parse_events_terms__delete(parse_state.terms); 2200 return ret; 2201 } 2202 2203 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state, 2204 const char *str, char *pmu_name, 2205 struct list_head *list) 2206 { 2207 struct parse_events_state ps = { 2208 .list = LIST_HEAD_INIT(ps.list), 2209 .stoken = PE_START_EVENTS, 2210 .hybrid_pmu_name = pmu_name, 2211 .idx = parse_state->idx, 2212 }; 2213 int ret; 2214 2215 ret = parse_events__scanner(str, &ps); 2216 perf_pmu__parse_cleanup(); 2217 2218 if (!ret) { 2219 if (!list_empty(&ps.list)) { 2220 list_splice(&ps.list, list); 2221 parse_state->idx = ps.idx; 2222 return 0; 2223 } else 2224 return -1; 2225 } 2226 2227 return ret; 2228 } 2229 2230 int __parse_events(struct evlist *evlist, const char *str, 2231 struct parse_events_error *err, struct perf_pmu *fake_pmu) 2232 { 2233 struct parse_events_state parse_state = { 2234 .list = LIST_HEAD_INIT(parse_state.list), 2235 .idx = evlist->core.nr_entries, 2236 .error = err, 2237 .evlist = evlist, 2238 .stoken = PE_START_EVENTS, 2239 .fake_pmu = fake_pmu, 2240 }; 2241 int ret; 2242 2243 ret = parse_events__scanner(str, &parse_state); 2244 perf_pmu__parse_cleanup(); 2245 2246 if (!ret && list_empty(&parse_state.list)) { 2247 WARN_ONCE(true, "WARNING: event parser found nothing\n"); 2248 return -1; 2249 } 2250 2251 /* 2252 * Add list to the evlist even with errors to allow callers to clean up. 2253 */ 2254 evlist__splice_list_tail(evlist, &parse_state.list); 2255 2256 if (!ret) { 2257 struct evsel *last; 2258 2259 evlist->core.nr_groups += parse_state.nr_groups; 2260 last = evlist__last(evlist); 2261 last->cmdline_group_boundary = true; 2262 2263 return 0; 2264 } 2265 2266 /* 2267 * There are 2 users - builtin-record and builtin-test objects. 2268 * Both call evlist__delete in case of error, so we dont 2269 * need to bother. 2270 */ 2271 return ret; 2272 } 2273 2274 int parse_event(struct evlist *evlist, const char *str) 2275 { 2276 struct parse_events_error err; 2277 int ret; 2278 2279 parse_events_error__init(&err); 2280 ret = parse_events(evlist, str, &err); 2281 parse_events_error__exit(&err); 2282 return ret; 2283 } 2284 2285 void parse_events_error__init(struct parse_events_error *err) 2286 { 2287 bzero(err, sizeof(*err)); 2288 } 2289 2290 void parse_events_error__exit(struct parse_events_error *err) 2291 { 2292 zfree(&err->str); 2293 zfree(&err->help); 2294 zfree(&err->first_str); 2295 zfree(&err->first_help); 2296 } 2297 2298 void parse_events_error__handle(struct parse_events_error *err, int idx, 2299 char *str, char *help) 2300 { 2301 if (WARN(!str || !err, "WARNING: failed to provide error string or struct\n")) 2302 goto out_free; 2303 switch (err->num_errors) { 2304 case 0: 2305 err->idx = idx; 2306 err->str = str; 2307 err->help = help; 2308 break; 2309 case 1: 2310 err->first_idx = err->idx; 2311 err->idx = idx; 2312 err->first_str = err->str; 2313 err->str = str; 2314 err->first_help = err->help; 2315 err->help = help; 2316 break; 2317 default: 2318 pr_debug("Multiple errors dropping message: %s (%s)\n", 2319 err->str, err->help); 2320 free(err->str); 2321 err->str = str; 2322 free(err->help); 2323 err->help = help; 2324 break; 2325 } 2326 err->num_errors++; 2327 return; 2328 2329 out_free: 2330 free(str); 2331 free(help); 2332 } 2333 2334 #define MAX_WIDTH 1000 2335 static int get_term_width(void) 2336 { 2337 struct winsize ws; 2338 2339 get_term_dimensions(&ws); 2340 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; 2341 } 2342 2343 static void __parse_events_error__print(int err_idx, const char *err_str, 2344 const char *err_help, const char *event) 2345 { 2346 const char *str = "invalid or unsupported event: "; 2347 char _buf[MAX_WIDTH]; 2348 char *buf = (char *) event; 2349 int idx = 0; 2350 if (err_str) { 2351 /* -2 for extra '' in the final fprintf */ 2352 int width = get_term_width() - 2; 2353 int len_event = strlen(event); 2354 int len_str, max_len, cut = 0; 2355 2356 /* 2357 * Maximum error index indent, we will cut 2358 * the event string if it's bigger. 2359 */ 2360 int max_err_idx = 13; 2361 2362 /* 2363 * Let's be specific with the message when 2364 * we have the precise error. 2365 */ 2366 str = "event syntax error: "; 2367 len_str = strlen(str); 2368 max_len = width - len_str; 2369 2370 buf = _buf; 2371 2372 /* We're cutting from the beginning. */ 2373 if (err_idx > max_err_idx) 2374 cut = err_idx - max_err_idx; 2375 2376 strncpy(buf, event + cut, max_len); 2377 2378 /* Mark cut parts with '..' on both sides. */ 2379 if (cut) 2380 buf[0] = buf[1] = '.'; 2381 2382 if ((len_event - cut) > max_len) { 2383 buf[max_len - 1] = buf[max_len - 2] = '.'; 2384 buf[max_len] = 0; 2385 } 2386 2387 idx = len_str + err_idx - cut; 2388 } 2389 2390 fprintf(stderr, "%s'%s'\n", str, buf); 2391 if (idx) { 2392 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str); 2393 if (err_help) 2394 fprintf(stderr, "\n%s\n", err_help); 2395 } 2396 } 2397 2398 void parse_events_error__print(struct parse_events_error *err, 2399 const char *event) 2400 { 2401 if (!err->num_errors) 2402 return; 2403 2404 __parse_events_error__print(err->idx, err->str, err->help, event); 2405 2406 if (err->num_errors > 1) { 2407 fputs("\nInitial error:\n", stderr); 2408 __parse_events_error__print(err->first_idx, err->first_str, 2409 err->first_help, event); 2410 } 2411 } 2412 2413 #undef MAX_WIDTH 2414 2415 int parse_events_option(const struct option *opt, const char *str, 2416 int unset __maybe_unused) 2417 { 2418 struct evlist *evlist = *(struct evlist **)opt->value; 2419 struct parse_events_error err; 2420 int ret; 2421 2422 parse_events_error__init(&err); 2423 ret = parse_events(evlist, str, &err); 2424 2425 if (ret) { 2426 parse_events_error__print(&err, str); 2427 fprintf(stderr, "Run 'perf list' for a list of valid events\n"); 2428 } 2429 parse_events_error__exit(&err); 2430 2431 return ret; 2432 } 2433 2434 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset) 2435 { 2436 struct evlist **evlistp = opt->value; 2437 int ret; 2438 2439 if (*evlistp == NULL) { 2440 *evlistp = evlist__new(); 2441 2442 if (*evlistp == NULL) { 2443 fprintf(stderr, "Not enough memory to create evlist\n"); 2444 return -1; 2445 } 2446 } 2447 2448 ret = parse_events_option(opt, str, unset); 2449 if (ret) { 2450 evlist__delete(*evlistp); 2451 *evlistp = NULL; 2452 } 2453 2454 return ret; 2455 } 2456 2457 static int 2458 foreach_evsel_in_last_glob(struct evlist *evlist, 2459 int (*func)(struct evsel *evsel, 2460 const void *arg), 2461 const void *arg) 2462 { 2463 struct evsel *last = NULL; 2464 int err; 2465 2466 /* 2467 * Don't return when list_empty, give func a chance to report 2468 * error when it found last == NULL. 2469 * 2470 * So no need to WARN here, let *func do this. 2471 */ 2472 if (evlist->core.nr_entries > 0) 2473 last = evlist__last(evlist); 2474 2475 do { 2476 err = (*func)(last, arg); 2477 if (err) 2478 return -1; 2479 if (!last) 2480 return 0; 2481 2482 if (last->core.node.prev == &evlist->core.entries) 2483 return 0; 2484 last = list_entry(last->core.node.prev, struct evsel, core.node); 2485 } while (!last->cmdline_group_boundary); 2486 2487 return 0; 2488 } 2489 2490 static int set_filter(struct evsel *evsel, const void *arg) 2491 { 2492 const char *str = arg; 2493 bool found = false; 2494 int nr_addr_filters = 0; 2495 struct perf_pmu *pmu = NULL; 2496 2497 if (evsel == NULL) { 2498 fprintf(stderr, 2499 "--filter option should follow a -e tracepoint or HW tracer option\n"); 2500 return -1; 2501 } 2502 2503 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) { 2504 if (evsel__append_tp_filter(evsel, str) < 0) { 2505 fprintf(stderr, 2506 "not enough memory to hold filter string\n"); 2507 return -1; 2508 } 2509 2510 return 0; 2511 } 2512 2513 while ((pmu = perf_pmu__scan(pmu)) != NULL) 2514 if (pmu->type == evsel->core.attr.type) { 2515 found = true; 2516 break; 2517 } 2518 2519 if (found) 2520 perf_pmu__scan_file(pmu, "nr_addr_filters", 2521 "%d", &nr_addr_filters); 2522 2523 if (!nr_addr_filters) { 2524 fprintf(stderr, 2525 "This CPU does not support address filtering\n"); 2526 return -1; 2527 } 2528 2529 if (evsel__append_addr_filter(evsel, str) < 0) { 2530 fprintf(stderr, 2531 "not enough memory to hold filter string\n"); 2532 return -1; 2533 } 2534 2535 return 0; 2536 } 2537 2538 int parse_filter(const struct option *opt, const char *str, 2539 int unset __maybe_unused) 2540 { 2541 struct evlist *evlist = *(struct evlist **)opt->value; 2542 2543 return foreach_evsel_in_last_glob(evlist, set_filter, 2544 (const void *)str); 2545 } 2546 2547 static int add_exclude_perf_filter(struct evsel *evsel, 2548 const void *arg __maybe_unused) 2549 { 2550 char new_filter[64]; 2551 2552 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) { 2553 fprintf(stderr, 2554 "--exclude-perf option should follow a -e tracepoint option\n"); 2555 return -1; 2556 } 2557 2558 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid()); 2559 2560 if (evsel__append_tp_filter(evsel, new_filter) < 0) { 2561 fprintf(stderr, 2562 "not enough memory to hold filter string\n"); 2563 return -1; 2564 } 2565 2566 return 0; 2567 } 2568 2569 int exclude_perf(const struct option *opt, 2570 const char *arg __maybe_unused, 2571 int unset __maybe_unused) 2572 { 2573 struct evlist *evlist = *(struct evlist **)opt->value; 2574 2575 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter, 2576 NULL); 2577 } 2578 2579 int parse_events__is_hardcoded_term(struct parse_events_term *term) 2580 { 2581 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; 2582 } 2583 2584 static int new_term(struct parse_events_term **_term, 2585 struct parse_events_term *temp, 2586 char *str, u64 num) 2587 { 2588 struct parse_events_term *term; 2589 2590 term = malloc(sizeof(*term)); 2591 if (!term) 2592 return -ENOMEM; 2593 2594 *term = *temp; 2595 INIT_LIST_HEAD(&term->list); 2596 term->weak = false; 2597 2598 switch (term->type_val) { 2599 case PARSE_EVENTS__TERM_TYPE_NUM: 2600 term->val.num = num; 2601 break; 2602 case PARSE_EVENTS__TERM_TYPE_STR: 2603 term->val.str = str; 2604 break; 2605 default: 2606 free(term); 2607 return -EINVAL; 2608 } 2609 2610 *_term = term; 2611 return 0; 2612 } 2613 2614 int parse_events_term__num(struct parse_events_term **term, 2615 int type_term, char *config, u64 num, 2616 bool no_value, 2617 void *loc_term_, void *loc_val_) 2618 { 2619 YYLTYPE *loc_term = loc_term_; 2620 YYLTYPE *loc_val = loc_val_; 2621 2622 struct parse_events_term temp = { 2623 .type_val = PARSE_EVENTS__TERM_TYPE_NUM, 2624 .type_term = type_term, 2625 .config = config ? : strdup(config_term_names[type_term]), 2626 .no_value = no_value, 2627 .err_term = loc_term ? loc_term->first_column : 0, 2628 .err_val = loc_val ? loc_val->first_column : 0, 2629 }; 2630 2631 return new_term(term, &temp, NULL, num); 2632 } 2633 2634 int parse_events_term__str(struct parse_events_term **term, 2635 int type_term, char *config, char *str, 2636 void *loc_term_, void *loc_val_) 2637 { 2638 YYLTYPE *loc_term = loc_term_; 2639 YYLTYPE *loc_val = loc_val_; 2640 2641 struct parse_events_term temp = { 2642 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 2643 .type_term = type_term, 2644 .config = config, 2645 .err_term = loc_term ? loc_term->first_column : 0, 2646 .err_val = loc_val ? loc_val->first_column : 0, 2647 }; 2648 2649 return new_term(term, &temp, str, 0); 2650 } 2651 2652 int parse_events_term__sym_hw(struct parse_events_term **term, 2653 char *config, unsigned idx) 2654 { 2655 struct event_symbol *sym; 2656 char *str; 2657 struct parse_events_term temp = { 2658 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 2659 .type_term = PARSE_EVENTS__TERM_TYPE_USER, 2660 .config = config, 2661 }; 2662 2663 if (!temp.config) { 2664 temp.config = strdup("event"); 2665 if (!temp.config) 2666 return -ENOMEM; 2667 } 2668 BUG_ON(idx >= PERF_COUNT_HW_MAX); 2669 sym = &event_symbols_hw[idx]; 2670 2671 str = strdup(sym->symbol); 2672 if (!str) 2673 return -ENOMEM; 2674 return new_term(term, &temp, str, 0); 2675 } 2676 2677 int parse_events_term__clone(struct parse_events_term **new, 2678 struct parse_events_term *term) 2679 { 2680 char *str; 2681 struct parse_events_term temp = { 2682 .type_val = term->type_val, 2683 .type_term = term->type_term, 2684 .config = NULL, 2685 .err_term = term->err_term, 2686 .err_val = term->err_val, 2687 }; 2688 2689 if (term->config) { 2690 temp.config = strdup(term->config); 2691 if (!temp.config) 2692 return -ENOMEM; 2693 } 2694 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) 2695 return new_term(new, &temp, NULL, term->val.num); 2696 2697 str = strdup(term->val.str); 2698 if (!str) 2699 return -ENOMEM; 2700 return new_term(new, &temp, str, 0); 2701 } 2702 2703 void parse_events_term__delete(struct parse_events_term *term) 2704 { 2705 if (term->array.nr_ranges) 2706 zfree(&term->array.ranges); 2707 2708 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) 2709 zfree(&term->val.str); 2710 2711 zfree(&term->config); 2712 free(term); 2713 } 2714 2715 int parse_events_copy_term_list(struct list_head *old, 2716 struct list_head **new) 2717 { 2718 struct parse_events_term *term, *n; 2719 int ret; 2720 2721 if (!old) { 2722 *new = NULL; 2723 return 0; 2724 } 2725 2726 *new = malloc(sizeof(struct list_head)); 2727 if (!*new) 2728 return -ENOMEM; 2729 INIT_LIST_HEAD(*new); 2730 2731 list_for_each_entry (term, old, list) { 2732 ret = parse_events_term__clone(&n, term); 2733 if (ret) 2734 return ret; 2735 list_add_tail(&n->list, *new); 2736 } 2737 return 0; 2738 } 2739 2740 void parse_events_terms__purge(struct list_head *terms) 2741 { 2742 struct parse_events_term *term, *h; 2743 2744 list_for_each_entry_safe(term, h, terms, list) { 2745 list_del_init(&term->list); 2746 parse_events_term__delete(term); 2747 } 2748 } 2749 2750 void parse_events_terms__delete(struct list_head *terms) 2751 { 2752 if (!terms) 2753 return; 2754 parse_events_terms__purge(terms); 2755 free(terms); 2756 } 2757 2758 void parse_events__clear_array(struct parse_events_array *a) 2759 { 2760 zfree(&a->ranges); 2761 } 2762 2763 void parse_events_evlist_error(struct parse_events_state *parse_state, 2764 int idx, const char *str) 2765 { 2766 if (!parse_state->error) 2767 return; 2768 2769 parse_events_error__handle(parse_state->error, idx, strdup(str), NULL); 2770 } 2771 2772 static void config_terms_list(char *buf, size_t buf_sz) 2773 { 2774 int i; 2775 bool first = true; 2776 2777 buf[0] = '\0'; 2778 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) { 2779 const char *name = config_term_names[i]; 2780 2781 if (!config_term_avail(i, NULL)) 2782 continue; 2783 if (!name) 2784 continue; 2785 if (name[0] == '<') 2786 continue; 2787 2788 if (strlen(buf) + strlen(name) + 2 >= buf_sz) 2789 return; 2790 2791 if (!first) 2792 strcat(buf, ","); 2793 else 2794 first = false; 2795 strcat(buf, name); 2796 } 2797 } 2798 2799 /* 2800 * Return string contains valid config terms of an event. 2801 * @additional_terms: For terms such as PMU sysfs terms. 2802 */ 2803 char *parse_events_formats_error_string(char *additional_terms) 2804 { 2805 char *str; 2806 /* "no-overwrite" is the longest name */ 2807 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR * 2808 (sizeof("no-overwrite") - 1)]; 2809 2810 config_terms_list(static_terms, sizeof(static_terms)); 2811 /* valid terms */ 2812 if (additional_terms) { 2813 if (asprintf(&str, "valid terms: %s,%s", 2814 additional_terms, static_terms) < 0) 2815 goto fail; 2816 } else { 2817 if (asprintf(&str, "valid terms: %s", static_terms) < 0) 2818 goto fail; 2819 } 2820 return str; 2821 2822 fail: 2823 return NULL; 2824 } 2825 2826 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx, 2827 struct perf_event_attr *attr, 2828 const char *name, 2829 const char *metric_id, 2830 struct perf_pmu *pmu, 2831 struct list_head *config_terms) 2832 { 2833 return __add_event(list, idx, attr, /*init_attr=*/true, name, metric_id, 2834 pmu, config_terms, /*auto_merge_stats=*/false, 2835 /*cpu_list=*/NULL); 2836 } 2837