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 "bpf-loader.h" 23 #include "debug.h" 24 #include <api/fs/tracing_path.h> 25 #include <perf/cpumap.h> 26 #include "parse-events-bison.h" 27 #define YY_EXTRA_TYPE void* 28 #include "parse-events-flex.h" 29 #include "pmu.h" 30 #include "thread_map.h" 31 #include "probe-file.h" 32 #include "asm/bug.h" 33 #include "util/parse-branch-options.h" 34 #include "metricgroup.h" 35 #include "util/evsel_config.h" 36 #include "util/event.h" 37 #include "util/pfm.h" 38 #include "util/parse-events-hybrid.h" 39 #include "util/pmu-hybrid.h" 40 #include "perf.h" 41 42 #define MAX_NAME_LEN 100 43 44 #ifdef PARSER_DEBUG 45 extern int parse_events_debug; 46 #endif 47 int parse_events_parse(void *parse_state, void *scanner); 48 static int get_config_terms(struct list_head *head_config, 49 struct list_head *head_terms __maybe_unused); 50 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state, 51 const char *str, char *pmu_name, 52 struct list_head *list); 53 54 static struct perf_pmu_event_symbol *perf_pmu_events_list; 55 /* 56 * The variable indicates the number of supported pmu event symbols. 57 * 0 means not initialized and ready to init 58 * -1 means failed to init, don't try anymore 59 * >0 is the number of supported pmu event symbols 60 */ 61 static int perf_pmu_events_list_num; 62 63 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { 64 [PERF_COUNT_HW_CPU_CYCLES] = { 65 .symbol = "cpu-cycles", 66 .alias = "cycles", 67 }, 68 [PERF_COUNT_HW_INSTRUCTIONS] = { 69 .symbol = "instructions", 70 .alias = "", 71 }, 72 [PERF_COUNT_HW_CACHE_REFERENCES] = { 73 .symbol = "cache-references", 74 .alias = "", 75 }, 76 [PERF_COUNT_HW_CACHE_MISSES] = { 77 .symbol = "cache-misses", 78 .alias = "", 79 }, 80 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 81 .symbol = "branch-instructions", 82 .alias = "branches", 83 }, 84 [PERF_COUNT_HW_BRANCH_MISSES] = { 85 .symbol = "branch-misses", 86 .alias = "", 87 }, 88 [PERF_COUNT_HW_BUS_CYCLES] = { 89 .symbol = "bus-cycles", 90 .alias = "", 91 }, 92 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { 93 .symbol = "stalled-cycles-frontend", 94 .alias = "idle-cycles-frontend", 95 }, 96 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { 97 .symbol = "stalled-cycles-backend", 98 .alias = "idle-cycles-backend", 99 }, 100 [PERF_COUNT_HW_REF_CPU_CYCLES] = { 101 .symbol = "ref-cycles", 102 .alias = "", 103 }, 104 }; 105 106 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { 107 [PERF_COUNT_SW_CPU_CLOCK] = { 108 .symbol = "cpu-clock", 109 .alias = "", 110 }, 111 [PERF_COUNT_SW_TASK_CLOCK] = { 112 .symbol = "task-clock", 113 .alias = "", 114 }, 115 [PERF_COUNT_SW_PAGE_FAULTS] = { 116 .symbol = "page-faults", 117 .alias = "faults", 118 }, 119 [PERF_COUNT_SW_CONTEXT_SWITCHES] = { 120 .symbol = "context-switches", 121 .alias = "cs", 122 }, 123 [PERF_COUNT_SW_CPU_MIGRATIONS] = { 124 .symbol = "cpu-migrations", 125 .alias = "migrations", 126 }, 127 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { 128 .symbol = "minor-faults", 129 .alias = "", 130 }, 131 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { 132 .symbol = "major-faults", 133 .alias = "", 134 }, 135 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { 136 .symbol = "alignment-faults", 137 .alias = "", 138 }, 139 [PERF_COUNT_SW_EMULATION_FAULTS] = { 140 .symbol = "emulation-faults", 141 .alias = "", 142 }, 143 [PERF_COUNT_SW_DUMMY] = { 144 .symbol = "dummy", 145 .alias = "", 146 }, 147 [PERF_COUNT_SW_BPF_OUTPUT] = { 148 .symbol = "bpf-output", 149 .alias = "", 150 }, 151 [PERF_COUNT_SW_CGROUP_SWITCHES] = { 152 .symbol = "cgroup-switches", 153 .alias = "", 154 }, 155 }; 156 157 struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = { 158 [PERF_TOOL_DURATION_TIME] = { 159 .symbol = "duration_time", 160 .alias = "", 161 }, 162 [PERF_TOOL_USER_TIME] = { 163 .symbol = "user_time", 164 .alias = "", 165 }, 166 [PERF_TOOL_SYSTEM_TIME] = { 167 .symbol = "system_time", 168 .alias = "", 169 }, 170 }; 171 172 #define __PERF_EVENT_FIELD(config, name) \ 173 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT) 174 175 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW) 176 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG) 177 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE) 178 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT) 179 180 #define for_each_subsystem(sys_dir, sys_dirent) \ 181 while ((sys_dirent = readdir(sys_dir)) != NULL) \ 182 if (sys_dirent->d_type == DT_DIR && \ 183 (strcmp(sys_dirent->d_name, ".")) && \ 184 (strcmp(sys_dirent->d_name, ".."))) 185 186 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir) 187 { 188 char evt_path[MAXPATHLEN]; 189 int fd; 190 191 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name); 192 fd = open(evt_path, O_RDONLY); 193 if (fd < 0) 194 return -EINVAL; 195 close(fd); 196 197 return 0; 198 } 199 200 #define for_each_event(dir_path, evt_dir, evt_dirent) \ 201 while ((evt_dirent = readdir(evt_dir)) != NULL) \ 202 if (evt_dirent->d_type == DT_DIR && \ 203 (strcmp(evt_dirent->d_name, ".")) && \ 204 (strcmp(evt_dirent->d_name, "..")) && \ 205 (!tp_event_has_id(dir_path, evt_dirent))) 206 207 #define MAX_EVENT_LENGTH 512 208 209 struct tracepoint_path *tracepoint_id_to_path(u64 config) 210 { 211 struct tracepoint_path *path = NULL; 212 DIR *sys_dir, *evt_dir; 213 struct dirent *sys_dirent, *evt_dirent; 214 char id_buf[24]; 215 int fd; 216 u64 id; 217 char evt_path[MAXPATHLEN]; 218 char *dir_path; 219 220 sys_dir = tracing_events__opendir(); 221 if (!sys_dir) 222 return NULL; 223 224 for_each_subsystem(sys_dir, sys_dirent) { 225 dir_path = get_events_file(sys_dirent->d_name); 226 if (!dir_path) 227 continue; 228 evt_dir = opendir(dir_path); 229 if (!evt_dir) 230 goto next; 231 232 for_each_event(dir_path, evt_dir, evt_dirent) { 233 234 scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, 235 evt_dirent->d_name); 236 fd = open(evt_path, O_RDONLY); 237 if (fd < 0) 238 continue; 239 if (read(fd, id_buf, sizeof(id_buf)) < 0) { 240 close(fd); 241 continue; 242 } 243 close(fd); 244 id = atoll(id_buf); 245 if (id == config) { 246 put_events_file(dir_path); 247 closedir(evt_dir); 248 closedir(sys_dir); 249 path = zalloc(sizeof(*path)); 250 if (!path) 251 return NULL; 252 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) { 253 free(path); 254 return NULL; 255 } 256 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) { 257 zfree(&path->system); 258 free(path); 259 return NULL; 260 } 261 return path; 262 } 263 } 264 closedir(evt_dir); 265 next: 266 put_events_file(dir_path); 267 } 268 269 closedir(sys_dir); 270 return NULL; 271 } 272 273 struct tracepoint_path *tracepoint_name_to_path(const char *name) 274 { 275 struct tracepoint_path *path = zalloc(sizeof(*path)); 276 char *str = strchr(name, ':'); 277 278 if (path == NULL || str == NULL) { 279 free(path); 280 return NULL; 281 } 282 283 path->system = strndup(name, str - name); 284 path->name = strdup(str+1); 285 286 if (path->system == NULL || path->name == NULL) { 287 zfree(&path->system); 288 zfree(&path->name); 289 zfree(&path); 290 } 291 292 return path; 293 } 294 295 const char *event_type(int type) 296 { 297 switch (type) { 298 case PERF_TYPE_HARDWARE: 299 return "hardware"; 300 301 case PERF_TYPE_SOFTWARE: 302 return "software"; 303 304 case PERF_TYPE_TRACEPOINT: 305 return "tracepoint"; 306 307 case PERF_TYPE_HW_CACHE: 308 return "hardware-cache"; 309 310 default: 311 break; 312 } 313 314 return "unknown"; 315 } 316 317 static char *get_config_str(struct list_head *head_terms, int type_term) 318 { 319 struct parse_events_term *term; 320 321 if (!head_terms) 322 return NULL; 323 324 list_for_each_entry(term, head_terms, list) 325 if (term->type_term == type_term) 326 return term->val.str; 327 328 return NULL; 329 } 330 331 static char *get_config_metric_id(struct list_head *head_terms) 332 { 333 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_METRIC_ID); 334 } 335 336 static char *get_config_name(struct list_head *head_terms) 337 { 338 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_NAME); 339 } 340 341 static struct evsel * 342 __add_event(struct list_head *list, int *idx, 343 struct perf_event_attr *attr, 344 bool init_attr, 345 const char *name, const char *metric_id, struct perf_pmu *pmu, 346 struct list_head *config_terms, bool auto_merge_stats, 347 const char *cpu_list) 348 { 349 struct evsel *evsel; 350 struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) : 351 cpu_list ? perf_cpu_map__new(cpu_list) : NULL; 352 353 if (pmu && attr->type == PERF_TYPE_RAW) 354 perf_pmu__warn_invalid_config(pmu, attr->config, name); 355 356 if (init_attr) 357 event_attr_init(attr); 358 359 evsel = evsel__new_idx(attr, *idx); 360 if (!evsel) { 361 perf_cpu_map__put(cpus); 362 return NULL; 363 } 364 365 (*idx)++; 366 evsel->core.cpus = cpus; 367 evsel->core.own_cpus = perf_cpu_map__get(cpus); 368 evsel->core.requires_cpu = pmu ? pmu->is_uncore : false; 369 evsel->auto_merge_stats = auto_merge_stats; 370 371 if (name) 372 evsel->name = strdup(name); 373 374 if (metric_id) 375 evsel->metric_id = strdup(metric_id); 376 377 if (config_terms) 378 list_splice_init(config_terms, &evsel->config_terms); 379 380 if (list) 381 list_add_tail(&evsel->core.node, list); 382 383 return evsel; 384 } 385 386 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr, 387 const char *name, const char *metric_id, 388 struct perf_pmu *pmu) 389 { 390 return __add_event(/*list=*/NULL, &idx, attr, /*init_attr=*/false, name, 391 metric_id, pmu, /*config_terms=*/NULL, 392 /*auto_merge_stats=*/false, /*cpu_list=*/NULL); 393 } 394 395 static int add_event(struct list_head *list, int *idx, 396 struct perf_event_attr *attr, const char *name, 397 const char *metric_id, struct list_head *config_terms) 398 { 399 return __add_event(list, idx, attr, /*init_attr*/true, name, metric_id, 400 /*pmu=*/NULL, config_terms, 401 /*auto_merge_stats=*/false, /*cpu_list=*/NULL) ? 0 : -ENOMEM; 402 } 403 404 static int add_event_tool(struct list_head *list, int *idx, 405 enum perf_tool_event tool_event) 406 { 407 struct evsel *evsel; 408 struct perf_event_attr attr = { 409 .type = PERF_TYPE_SOFTWARE, 410 .config = PERF_COUNT_SW_DUMMY, 411 }; 412 413 evsel = __add_event(list, idx, &attr, /*init_attr=*/true, /*name=*/NULL, 414 /*metric_id=*/NULL, /*pmu=*/NULL, 415 /*config_terms=*/NULL, /*auto_merge_stats=*/false, 416 /*cpu_list=*/"0"); 417 if (!evsel) 418 return -ENOMEM; 419 evsel->tool_event = tool_event; 420 if (tool_event == PERF_TOOL_DURATION_TIME 421 || tool_event == PERF_TOOL_USER_TIME 422 || tool_event == PERF_TOOL_SYSTEM_TIME) { 423 free((char *)evsel->unit); 424 evsel->unit = strdup("ns"); 425 } 426 return 0; 427 } 428 429 static int parse_aliases(char *str, const char *const names[][EVSEL__MAX_ALIASES], int size) 430 { 431 int i, j; 432 int n, longest = -1; 433 434 for (i = 0; i < size; i++) { 435 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) { 436 n = strlen(names[i][j]); 437 if (n > longest && !strncasecmp(str, names[i][j], n)) 438 longest = n; 439 } 440 if (longest > 0) 441 return i; 442 } 443 444 return -1; 445 } 446 447 typedef int config_term_func_t(struct perf_event_attr *attr, 448 struct parse_events_term *term, 449 struct parse_events_error *err); 450 static int config_term_common(struct perf_event_attr *attr, 451 struct parse_events_term *term, 452 struct parse_events_error *err); 453 static int config_attr(struct perf_event_attr *attr, 454 struct list_head *head, 455 struct parse_events_error *err, 456 config_term_func_t config_term); 457 458 int parse_events_add_cache(struct list_head *list, int *idx, 459 char *type, char *op_result1, char *op_result2, 460 struct parse_events_error *err, 461 struct list_head *head_config, 462 struct parse_events_state *parse_state) 463 { 464 struct perf_event_attr attr; 465 LIST_HEAD(config_terms); 466 char name[MAX_NAME_LEN]; 467 const char *config_name, *metric_id; 468 int cache_type = -1, cache_op = -1, cache_result = -1; 469 char *op_result[2] = { op_result1, op_result2 }; 470 int i, n, ret; 471 bool hybrid; 472 473 /* 474 * No fallback - if we cannot get a clear cache type 475 * then bail out: 476 */ 477 cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX); 478 if (cache_type == -1) 479 return -EINVAL; 480 481 config_name = get_config_name(head_config); 482 n = snprintf(name, MAX_NAME_LEN, "%s", type); 483 484 for (i = 0; (i < 2) && (op_result[i]); i++) { 485 char *str = op_result[i]; 486 487 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); 488 489 if (cache_op == -1) { 490 cache_op = parse_aliases(str, evsel__hw_cache_op, 491 PERF_COUNT_HW_CACHE_OP_MAX); 492 if (cache_op >= 0) { 493 if (!evsel__is_cache_op_valid(cache_type, cache_op)) 494 return -EINVAL; 495 continue; 496 } 497 } 498 499 if (cache_result == -1) { 500 cache_result = parse_aliases(str, evsel__hw_cache_result, 501 PERF_COUNT_HW_CACHE_RESULT_MAX); 502 if (cache_result >= 0) 503 continue; 504 } 505 } 506 507 /* 508 * Fall back to reads: 509 */ 510 if (cache_op == -1) 511 cache_op = PERF_COUNT_HW_CACHE_OP_READ; 512 513 /* 514 * Fall back to accesses: 515 */ 516 if (cache_result == -1) 517 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; 518 519 memset(&attr, 0, sizeof(attr)); 520 attr.config = cache_type | (cache_op << 8) | (cache_result << 16); 521 attr.type = PERF_TYPE_HW_CACHE; 522 523 if (head_config) { 524 if (config_attr(&attr, head_config, err, 525 config_term_common)) 526 return -EINVAL; 527 528 if (get_config_terms(head_config, &config_terms)) 529 return -ENOMEM; 530 } 531 532 metric_id = get_config_metric_id(head_config); 533 ret = parse_events__add_cache_hybrid(list, idx, &attr, 534 config_name ? : name, 535 metric_id, 536 &config_terms, 537 &hybrid, parse_state); 538 if (hybrid) 539 goto out_free_terms; 540 541 ret = add_event(list, idx, &attr, config_name ? : name, metric_id, 542 &config_terms); 543 out_free_terms: 544 free_config_terms(&config_terms); 545 return ret; 546 } 547 548 static void tracepoint_error(struct parse_events_error *e, int err, 549 const char *sys, const char *name) 550 { 551 const char *str; 552 char help[BUFSIZ]; 553 554 if (!e) 555 return; 556 557 /* 558 * We get error directly from syscall errno ( > 0), 559 * or from encoded pointer's error ( < 0). 560 */ 561 err = abs(err); 562 563 switch (err) { 564 case EACCES: 565 str = "can't access trace events"; 566 break; 567 case ENOENT: 568 str = "unknown tracepoint"; 569 break; 570 default: 571 str = "failed to add tracepoint"; 572 break; 573 } 574 575 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); 576 parse_events_error__handle(e, 0, strdup(str), strdup(help)); 577 } 578 579 static int add_tracepoint(struct list_head *list, int *idx, 580 const char *sys_name, const char *evt_name, 581 struct parse_events_error *err, 582 struct list_head *head_config) 583 { 584 struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++); 585 586 if (IS_ERR(evsel)) { 587 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name); 588 return PTR_ERR(evsel); 589 } 590 591 if (head_config) { 592 LIST_HEAD(config_terms); 593 594 if (get_config_terms(head_config, &config_terms)) 595 return -ENOMEM; 596 list_splice(&config_terms, &evsel->config_terms); 597 } 598 599 list_add_tail(&evsel->core.node, list); 600 return 0; 601 } 602 603 static int add_tracepoint_multi_event(struct list_head *list, int *idx, 604 const char *sys_name, const char *evt_name, 605 struct parse_events_error *err, 606 struct list_head *head_config) 607 { 608 char *evt_path; 609 struct dirent *evt_ent; 610 DIR *evt_dir; 611 int ret = 0, found = 0; 612 613 evt_path = get_events_file(sys_name); 614 if (!evt_path) { 615 tracepoint_error(err, errno, sys_name, evt_name); 616 return -1; 617 } 618 evt_dir = opendir(evt_path); 619 if (!evt_dir) { 620 put_events_file(evt_path); 621 tracepoint_error(err, errno, sys_name, evt_name); 622 return -1; 623 } 624 625 while (!ret && (evt_ent = readdir(evt_dir))) { 626 if (!strcmp(evt_ent->d_name, ".") 627 || !strcmp(evt_ent->d_name, "..") 628 || !strcmp(evt_ent->d_name, "enable") 629 || !strcmp(evt_ent->d_name, "filter")) 630 continue; 631 632 if (!strglobmatch(evt_ent->d_name, evt_name)) 633 continue; 634 635 found++; 636 637 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, 638 err, head_config); 639 } 640 641 if (!found) { 642 tracepoint_error(err, ENOENT, sys_name, evt_name); 643 ret = -1; 644 } 645 646 put_events_file(evt_path); 647 closedir(evt_dir); 648 return ret; 649 } 650 651 static int add_tracepoint_event(struct list_head *list, int *idx, 652 const char *sys_name, const char *evt_name, 653 struct parse_events_error *err, 654 struct list_head *head_config) 655 { 656 return strpbrk(evt_name, "*?") ? 657 add_tracepoint_multi_event(list, idx, sys_name, evt_name, 658 err, head_config) : 659 add_tracepoint(list, idx, sys_name, evt_name, 660 err, head_config); 661 } 662 663 static int add_tracepoint_multi_sys(struct list_head *list, int *idx, 664 const char *sys_name, const char *evt_name, 665 struct parse_events_error *err, 666 struct list_head *head_config) 667 { 668 struct dirent *events_ent; 669 DIR *events_dir; 670 int ret = 0; 671 672 events_dir = tracing_events__opendir(); 673 if (!events_dir) { 674 tracepoint_error(err, errno, sys_name, evt_name); 675 return -1; 676 } 677 678 while (!ret && (events_ent = readdir(events_dir))) { 679 if (!strcmp(events_ent->d_name, ".") 680 || !strcmp(events_ent->d_name, "..") 681 || !strcmp(events_ent->d_name, "enable") 682 || !strcmp(events_ent->d_name, "header_event") 683 || !strcmp(events_ent->d_name, "header_page")) 684 continue; 685 686 if (!strglobmatch(events_ent->d_name, sys_name)) 687 continue; 688 689 ret = add_tracepoint_event(list, idx, events_ent->d_name, 690 evt_name, err, head_config); 691 } 692 693 closedir(events_dir); 694 return ret; 695 } 696 697 #ifdef HAVE_LIBBPF_SUPPORT 698 struct __add_bpf_event_param { 699 struct parse_events_state *parse_state; 700 struct list_head *list; 701 struct list_head *head_config; 702 }; 703 704 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj, 705 void *_param) 706 { 707 LIST_HEAD(new_evsels); 708 struct __add_bpf_event_param *param = _param; 709 struct parse_events_state *parse_state = param->parse_state; 710 struct list_head *list = param->list; 711 struct evsel *pos; 712 int err; 713 /* 714 * Check if we should add the event, i.e. if it is a TP but starts with a '!', 715 * then don't add the tracepoint, this will be used for something else, like 716 * adding to a BPF_MAP_TYPE_PROG_ARRAY. 717 * 718 * See tools/perf/examples/bpf/augmented_raw_syscalls.c 719 */ 720 if (group[0] == '!') 721 return 0; 722 723 pr_debug("add bpf event %s:%s and attach bpf program %d\n", 724 group, event, fd); 725 726 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group, 727 event, parse_state->error, 728 param->head_config); 729 if (err) { 730 struct evsel *evsel, *tmp; 731 732 pr_debug("Failed to add BPF event %s:%s\n", 733 group, event); 734 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) { 735 list_del_init(&evsel->core.node); 736 evsel__delete(evsel); 737 } 738 return err; 739 } 740 pr_debug("adding %s:%s\n", group, event); 741 742 list_for_each_entry(pos, &new_evsels, core.node) { 743 pr_debug("adding %s:%s to %p\n", 744 group, event, pos); 745 pos->bpf_fd = fd; 746 pos->bpf_obj = obj; 747 } 748 list_splice(&new_evsels, list); 749 return 0; 750 } 751 752 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 753 struct list_head *list, 754 struct bpf_object *obj, 755 struct list_head *head_config) 756 { 757 int err; 758 char errbuf[BUFSIZ]; 759 struct __add_bpf_event_param param = {parse_state, list, head_config}; 760 static bool registered_unprobe_atexit = false; 761 762 if (IS_ERR(obj) || !obj) { 763 snprintf(errbuf, sizeof(errbuf), 764 "Internal error: load bpf obj with NULL"); 765 err = -EINVAL; 766 goto errout; 767 } 768 769 /* 770 * Register atexit handler before calling bpf__probe() so 771 * bpf__probe() don't need to unprobe probe points its already 772 * created when failure. 773 */ 774 if (!registered_unprobe_atexit) { 775 atexit(bpf__clear); 776 registered_unprobe_atexit = true; 777 } 778 779 err = bpf__probe(obj); 780 if (err) { 781 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf)); 782 goto errout; 783 } 784 785 err = bpf__load(obj); 786 if (err) { 787 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf)); 788 goto errout; 789 } 790 791 err = bpf__foreach_event(obj, add_bpf_event, ¶m); 792 if (err) { 793 snprintf(errbuf, sizeof(errbuf), 794 "Attach events in BPF object failed"); 795 goto errout; 796 } 797 798 return 0; 799 errout: 800 parse_events_error__handle(parse_state->error, 0, 801 strdup(errbuf), strdup("(add -v to see detail)")); 802 return err; 803 } 804 805 static int 806 parse_events_config_bpf(struct parse_events_state *parse_state, 807 struct bpf_object *obj, 808 struct list_head *head_config) 809 { 810 struct parse_events_term *term; 811 int error_pos; 812 813 if (!head_config || list_empty(head_config)) 814 return 0; 815 816 list_for_each_entry(term, head_config, list) { 817 int err; 818 819 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) { 820 parse_events_error__handle(parse_state->error, term->err_term, 821 strdup("Invalid config term for BPF object"), 822 NULL); 823 return -EINVAL; 824 } 825 826 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos); 827 if (err) { 828 char errbuf[BUFSIZ]; 829 int idx; 830 831 bpf__strerror_config_obj(obj, term, parse_state->evlist, 832 &error_pos, err, errbuf, 833 sizeof(errbuf)); 834 835 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE) 836 idx = term->err_val; 837 else 838 idx = term->err_term + error_pos; 839 840 parse_events_error__handle(parse_state->error, idx, 841 strdup(errbuf), 842 strdup( 843 "Hint:\tValid config terms:\n" 844 " \tmap:[<arraymap>].value<indices>=[value]\n" 845 " \tmap:[<eventmap>].event<indices>=[event]\n" 846 "\n" 847 " \twhere <indices> is something like [0,3...5] or [all]\n" 848 " \t(add -v to see detail)")); 849 return err; 850 } 851 } 852 return 0; 853 } 854 855 /* 856 * Split config terms: 857 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ... 858 * 'call-graph=fp' is 'evt config', should be applied to each 859 * events in bpf.c. 860 * 'map:array.value[0]=1' is 'obj config', should be processed 861 * with parse_events_config_bpf. 862 * 863 * Move object config terms from the first list to obj_head_config. 864 */ 865 static void 866 split_bpf_config_terms(struct list_head *evt_head_config, 867 struct list_head *obj_head_config) 868 { 869 struct parse_events_term *term, *temp; 870 871 /* 872 * Currently, all possible user config term 873 * belong to bpf object. parse_events__is_hardcoded_term() 874 * happens to be a good flag. 875 * 876 * See parse_events_config_bpf() and 877 * config_term_tracepoint(). 878 */ 879 list_for_each_entry_safe(term, temp, evt_head_config, list) 880 if (!parse_events__is_hardcoded_term(term)) 881 list_move_tail(&term->list, obj_head_config); 882 } 883 884 int parse_events_load_bpf(struct parse_events_state *parse_state, 885 struct list_head *list, 886 char *bpf_file_name, 887 bool source, 888 struct list_head *head_config) 889 { 890 int err; 891 struct bpf_object *obj; 892 LIST_HEAD(obj_head_config); 893 894 if (head_config) 895 split_bpf_config_terms(head_config, &obj_head_config); 896 897 obj = bpf__prepare_load(bpf_file_name, source); 898 if (IS_ERR(obj)) { 899 char errbuf[BUFSIZ]; 900 901 err = PTR_ERR(obj); 902 903 if (err == -ENOTSUP) 904 snprintf(errbuf, sizeof(errbuf), 905 "BPF support is not compiled"); 906 else 907 bpf__strerror_prepare_load(bpf_file_name, 908 source, 909 -err, errbuf, 910 sizeof(errbuf)); 911 912 parse_events_error__handle(parse_state->error, 0, 913 strdup(errbuf), strdup("(add -v to see detail)")); 914 return err; 915 } 916 917 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config); 918 if (err) 919 return err; 920 err = parse_events_config_bpf(parse_state, obj, &obj_head_config); 921 922 /* 923 * Caller doesn't know anything about obj_head_config, 924 * so combine them together again before returning. 925 */ 926 if (head_config) 927 list_splice_tail(&obj_head_config, head_config); 928 return err; 929 } 930 #else // HAVE_LIBBPF_SUPPORT 931 int parse_events_load_bpf_obj(struct parse_events_state *parse_state, 932 struct list_head *list __maybe_unused, 933 struct bpf_object *obj __maybe_unused, 934 struct list_head *head_config __maybe_unused) 935 { 936 parse_events_error__handle(parse_state->error, 0, 937 strdup("BPF support is not compiled"), 938 strdup("Make sure libbpf-devel is available at build time.")); 939 return -ENOTSUP; 940 } 941 942 int parse_events_load_bpf(struct parse_events_state *parse_state, 943 struct list_head *list __maybe_unused, 944 char *bpf_file_name __maybe_unused, 945 bool source __maybe_unused, 946 struct list_head *head_config __maybe_unused) 947 { 948 parse_events_error__handle(parse_state->error, 0, 949 strdup("BPF support is not compiled"), 950 strdup("Make sure libbpf-devel is available at build time.")); 951 return -ENOTSUP; 952 } 953 #endif // HAVE_LIBBPF_SUPPORT 954 955 static int 956 parse_breakpoint_type(const char *type, struct perf_event_attr *attr) 957 { 958 int i; 959 960 for (i = 0; i < 3; i++) { 961 if (!type || !type[i]) 962 break; 963 964 #define CHECK_SET_TYPE(bit) \ 965 do { \ 966 if (attr->bp_type & bit) \ 967 return -EINVAL; \ 968 else \ 969 attr->bp_type |= bit; \ 970 } while (0) 971 972 switch (type[i]) { 973 case 'r': 974 CHECK_SET_TYPE(HW_BREAKPOINT_R); 975 break; 976 case 'w': 977 CHECK_SET_TYPE(HW_BREAKPOINT_W); 978 break; 979 case 'x': 980 CHECK_SET_TYPE(HW_BREAKPOINT_X); 981 break; 982 default: 983 return -EINVAL; 984 } 985 } 986 987 #undef CHECK_SET_TYPE 988 989 if (!attr->bp_type) /* Default */ 990 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; 991 992 return 0; 993 } 994 995 int parse_events_add_breakpoint(struct list_head *list, int *idx, 996 u64 addr, char *type, u64 len) 997 { 998 struct perf_event_attr attr; 999 1000 memset(&attr, 0, sizeof(attr)); 1001 attr.bp_addr = addr; 1002 1003 if (parse_breakpoint_type(type, &attr)) 1004 return -EINVAL; 1005 1006 /* Provide some defaults if len is not specified */ 1007 if (!len) { 1008 if (attr.bp_type == HW_BREAKPOINT_X) 1009 len = sizeof(long); 1010 else 1011 len = HW_BREAKPOINT_LEN_4; 1012 } 1013 1014 attr.bp_len = len; 1015 1016 attr.type = PERF_TYPE_BREAKPOINT; 1017 attr.sample_period = 1; 1018 1019 return add_event(list, idx, &attr, /*name=*/NULL, /*mertic_id=*/NULL, 1020 /*config_terms=*/NULL); 1021 } 1022 1023 static int check_type_val(struct parse_events_term *term, 1024 struct parse_events_error *err, 1025 int type) 1026 { 1027 if (type == term->type_val) 1028 return 0; 1029 1030 if (err) { 1031 parse_events_error__handle(err, term->err_val, 1032 type == PARSE_EVENTS__TERM_TYPE_NUM 1033 ? strdup("expected numeric value") 1034 : strdup("expected string value"), 1035 NULL); 1036 } 1037 return -EINVAL; 1038 } 1039 1040 /* 1041 * Update according to parse-events.l 1042 */ 1043 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = { 1044 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>", 1045 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config", 1046 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1", 1047 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2", 1048 [PARSE_EVENTS__TERM_TYPE_NAME] = "name", 1049 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period", 1050 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq", 1051 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type", 1052 [PARSE_EVENTS__TERM_TYPE_TIME] = "time", 1053 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph", 1054 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size", 1055 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit", 1056 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit", 1057 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack", 1058 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr", 1059 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite", 1060 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite", 1061 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config", 1062 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore", 1063 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output", 1064 [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size", 1065 [PARSE_EVENTS__TERM_TYPE_METRIC_ID] = "metric-id", 1066 }; 1067 1068 static bool config_term_shrinked; 1069 1070 static bool 1071 config_term_avail(int term_type, struct parse_events_error *err) 1072 { 1073 char *err_str; 1074 1075 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { 1076 parse_events_error__handle(err, -1, 1077 strdup("Invalid term_type"), NULL); 1078 return false; 1079 } 1080 if (!config_term_shrinked) 1081 return true; 1082 1083 switch (term_type) { 1084 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1085 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 1086 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 1087 case PARSE_EVENTS__TERM_TYPE_NAME: 1088 case PARSE_EVENTS__TERM_TYPE_METRIC_ID: 1089 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1090 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1091 return true; 1092 default: 1093 if (!err) 1094 return false; 1095 1096 /* term_type is validated so indexing is safe */ 1097 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'", 1098 config_term_names[term_type]) >= 0) 1099 parse_events_error__handle(err, -1, err_str, NULL); 1100 return false; 1101 } 1102 } 1103 1104 void parse_events__shrink_config_terms(void) 1105 { 1106 config_term_shrinked = true; 1107 } 1108 1109 static int config_term_common(struct perf_event_attr *attr, 1110 struct parse_events_term *term, 1111 struct parse_events_error *err) 1112 { 1113 #define CHECK_TYPE_VAL(type) \ 1114 do { \ 1115 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \ 1116 return -EINVAL; \ 1117 } while (0) 1118 1119 switch (term->type_term) { 1120 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1121 CHECK_TYPE_VAL(NUM); 1122 attr->config = term->val.num; 1123 break; 1124 case PARSE_EVENTS__TERM_TYPE_CONFIG1: 1125 CHECK_TYPE_VAL(NUM); 1126 attr->config1 = term->val.num; 1127 break; 1128 case PARSE_EVENTS__TERM_TYPE_CONFIG2: 1129 CHECK_TYPE_VAL(NUM); 1130 attr->config2 = term->val.num; 1131 break; 1132 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1133 CHECK_TYPE_VAL(NUM); 1134 break; 1135 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1136 CHECK_TYPE_VAL(NUM); 1137 break; 1138 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1139 CHECK_TYPE_VAL(STR); 1140 if (strcmp(term->val.str, "no") && 1141 parse_branch_str(term->val.str, 1142 &attr->branch_sample_type)) { 1143 parse_events_error__handle(err, term->err_val, 1144 strdup("invalid branch sample type"), 1145 NULL); 1146 return -EINVAL; 1147 } 1148 break; 1149 case PARSE_EVENTS__TERM_TYPE_TIME: 1150 CHECK_TYPE_VAL(NUM); 1151 if (term->val.num > 1) { 1152 parse_events_error__handle(err, term->err_val, 1153 strdup("expected 0 or 1"), 1154 NULL); 1155 return -EINVAL; 1156 } 1157 break; 1158 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1159 CHECK_TYPE_VAL(STR); 1160 break; 1161 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1162 CHECK_TYPE_VAL(NUM); 1163 break; 1164 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1165 CHECK_TYPE_VAL(NUM); 1166 break; 1167 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1168 CHECK_TYPE_VAL(NUM); 1169 break; 1170 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1171 CHECK_TYPE_VAL(NUM); 1172 break; 1173 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1174 CHECK_TYPE_VAL(NUM); 1175 break; 1176 case PARSE_EVENTS__TERM_TYPE_NAME: 1177 CHECK_TYPE_VAL(STR); 1178 break; 1179 case PARSE_EVENTS__TERM_TYPE_METRIC_ID: 1180 CHECK_TYPE_VAL(STR); 1181 break; 1182 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1183 CHECK_TYPE_VAL(NUM); 1184 break; 1185 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1186 CHECK_TYPE_VAL(NUM); 1187 break; 1188 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1189 CHECK_TYPE_VAL(NUM); 1190 if ((unsigned int)term->val.num > 1) { 1191 parse_events_error__handle(err, term->err_val, 1192 strdup("expected 0 or 1"), 1193 NULL); 1194 return -EINVAL; 1195 } 1196 break; 1197 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1198 CHECK_TYPE_VAL(NUM); 1199 break; 1200 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1201 CHECK_TYPE_VAL(NUM); 1202 if (term->val.num > UINT_MAX) { 1203 parse_events_error__handle(err, term->err_val, 1204 strdup("too big"), 1205 NULL); 1206 return -EINVAL; 1207 } 1208 break; 1209 default: 1210 parse_events_error__handle(err, term->err_term, 1211 strdup("unknown term"), 1212 parse_events_formats_error_string(NULL)); 1213 return -EINVAL; 1214 } 1215 1216 /* 1217 * Check term availability after basic checking so 1218 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered. 1219 * 1220 * If check availability at the entry of this function, 1221 * user will see "'<sysfs term>' is not usable in 'perf stat'" 1222 * if an invalid config term is provided for legacy events 1223 * (for example, instructions/badterm/...), which is confusing. 1224 */ 1225 if (!config_term_avail(term->type_term, err)) 1226 return -EINVAL; 1227 return 0; 1228 #undef CHECK_TYPE_VAL 1229 } 1230 1231 static int config_term_pmu(struct perf_event_attr *attr, 1232 struct parse_events_term *term, 1233 struct parse_events_error *err) 1234 { 1235 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER || 1236 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG) 1237 /* 1238 * Always succeed for sysfs terms, as we dont know 1239 * at this point what type they need to have. 1240 */ 1241 return 0; 1242 else 1243 return config_term_common(attr, term, err); 1244 } 1245 1246 static int config_term_tracepoint(struct perf_event_attr *attr, 1247 struct parse_events_term *term, 1248 struct parse_events_error *err) 1249 { 1250 switch (term->type_term) { 1251 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1252 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1253 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1254 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1255 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1256 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1257 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1258 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1259 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1260 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1261 return config_term_common(attr, term, err); 1262 default: 1263 if (err) { 1264 parse_events_error__handle(err, term->err_term, 1265 strdup("unknown term"), 1266 strdup("valid terms: call-graph,stack-size\n")); 1267 } 1268 return -EINVAL; 1269 } 1270 1271 return 0; 1272 } 1273 1274 static int config_attr(struct perf_event_attr *attr, 1275 struct list_head *head, 1276 struct parse_events_error *err, 1277 config_term_func_t config_term) 1278 { 1279 struct parse_events_term *term; 1280 1281 list_for_each_entry(term, head, list) 1282 if (config_term(attr, term, err)) 1283 return -EINVAL; 1284 1285 return 0; 1286 } 1287 1288 static int get_config_terms(struct list_head *head_config, 1289 struct list_head *head_terms __maybe_unused) 1290 { 1291 #define ADD_CONFIG_TERM(__type, __weak) \ 1292 struct evsel_config_term *__t; \ 1293 \ 1294 __t = zalloc(sizeof(*__t)); \ 1295 if (!__t) \ 1296 return -ENOMEM; \ 1297 \ 1298 INIT_LIST_HEAD(&__t->list); \ 1299 __t->type = EVSEL__CONFIG_TERM_ ## __type; \ 1300 __t->weak = __weak; \ 1301 list_add_tail(&__t->list, head_terms) 1302 1303 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \ 1304 do { \ 1305 ADD_CONFIG_TERM(__type, __weak); \ 1306 __t->val.__name = __val; \ 1307 } while (0) 1308 1309 #define ADD_CONFIG_TERM_STR(__type, __val, __weak) \ 1310 do { \ 1311 ADD_CONFIG_TERM(__type, __weak); \ 1312 __t->val.str = strdup(__val); \ 1313 if (!__t->val.str) { \ 1314 zfree(&__t); \ 1315 return -ENOMEM; \ 1316 } \ 1317 __t->free_str = true; \ 1318 } while (0) 1319 1320 struct parse_events_term *term; 1321 1322 list_for_each_entry(term, head_config, list) { 1323 switch (term->type_term) { 1324 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: 1325 ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak); 1326 break; 1327 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: 1328 ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak); 1329 break; 1330 case PARSE_EVENTS__TERM_TYPE_TIME: 1331 ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak); 1332 break; 1333 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: 1334 ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak); 1335 break; 1336 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: 1337 ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak); 1338 break; 1339 case PARSE_EVENTS__TERM_TYPE_STACKSIZE: 1340 ADD_CONFIG_TERM_VAL(STACK_USER, stack_user, 1341 term->val.num, term->weak); 1342 break; 1343 case PARSE_EVENTS__TERM_TYPE_INHERIT: 1344 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1345 term->val.num ? 1 : 0, term->weak); 1346 break; 1347 case PARSE_EVENTS__TERM_TYPE_NOINHERIT: 1348 ADD_CONFIG_TERM_VAL(INHERIT, inherit, 1349 term->val.num ? 0 : 1, term->weak); 1350 break; 1351 case PARSE_EVENTS__TERM_TYPE_MAX_STACK: 1352 ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack, 1353 term->val.num, term->weak); 1354 break; 1355 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: 1356 ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events, 1357 term->val.num, term->weak); 1358 break; 1359 case PARSE_EVENTS__TERM_TYPE_OVERWRITE: 1360 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1361 term->val.num ? 1 : 0, term->weak); 1362 break; 1363 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: 1364 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, 1365 term->val.num ? 0 : 1, term->weak); 1366 break; 1367 case PARSE_EVENTS__TERM_TYPE_DRV_CFG: 1368 ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak); 1369 break; 1370 case PARSE_EVENTS__TERM_TYPE_PERCORE: 1371 ADD_CONFIG_TERM_VAL(PERCORE, percore, 1372 term->val.num ? true : false, term->weak); 1373 break; 1374 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: 1375 ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output, 1376 term->val.num ? 1 : 0, term->weak); 1377 break; 1378 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: 1379 ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size, 1380 term->val.num, term->weak); 1381 break; 1382 default: 1383 break; 1384 } 1385 } 1386 return 0; 1387 } 1388 1389 /* 1390 * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for 1391 * each bit of attr->config that the user has changed. 1392 */ 1393 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config, 1394 struct list_head *head_terms) 1395 { 1396 struct parse_events_term *term; 1397 u64 bits = 0; 1398 int type; 1399 1400 list_for_each_entry(term, head_config, list) { 1401 switch (term->type_term) { 1402 case PARSE_EVENTS__TERM_TYPE_USER: 1403 type = perf_pmu__format_type(&pmu->format, term->config); 1404 if (type != PERF_PMU_FORMAT_VALUE_CONFIG) 1405 continue; 1406 bits |= perf_pmu__format_bits(&pmu->format, term->config); 1407 break; 1408 case PARSE_EVENTS__TERM_TYPE_CONFIG: 1409 bits = ~(u64)0; 1410 break; 1411 default: 1412 break; 1413 } 1414 } 1415 1416 if (bits) 1417 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false); 1418 1419 #undef ADD_CONFIG_TERM 1420 return 0; 1421 } 1422 1423 int parse_events_add_tracepoint(struct list_head *list, int *idx, 1424 const char *sys, const char *event, 1425 struct parse_events_error *err, 1426 struct list_head *head_config) 1427 { 1428 if (head_config) { 1429 struct perf_event_attr attr; 1430 1431 if (config_attr(&attr, head_config, err, 1432 config_term_tracepoint)) 1433 return -EINVAL; 1434 } 1435 1436 if (strpbrk(sys, "*?")) 1437 return add_tracepoint_multi_sys(list, idx, sys, event, 1438 err, head_config); 1439 else 1440 return add_tracepoint_event(list, idx, sys, event, 1441 err, head_config); 1442 } 1443 1444 int parse_events_add_numeric(struct parse_events_state *parse_state, 1445 struct list_head *list, 1446 u32 type, u64 config, 1447 struct list_head *head_config) 1448 { 1449 struct perf_event_attr attr; 1450 LIST_HEAD(config_terms); 1451 const char *name, *metric_id; 1452 bool hybrid; 1453 int ret; 1454 1455 memset(&attr, 0, sizeof(attr)); 1456 attr.type = type; 1457 attr.config = config; 1458 1459 if (head_config) { 1460 if (config_attr(&attr, head_config, parse_state->error, 1461 config_term_common)) 1462 return -EINVAL; 1463 1464 if (get_config_terms(head_config, &config_terms)) 1465 return -ENOMEM; 1466 } 1467 1468 name = get_config_name(head_config); 1469 metric_id = get_config_metric_id(head_config); 1470 ret = parse_events__add_numeric_hybrid(parse_state, list, &attr, 1471 name, metric_id, 1472 &config_terms, &hybrid); 1473 if (hybrid) 1474 goto out_free_terms; 1475 1476 ret = add_event(list, &parse_state->idx, &attr, name, metric_id, 1477 &config_terms); 1478 out_free_terms: 1479 free_config_terms(&config_terms); 1480 return ret; 1481 } 1482 1483 int parse_events_add_tool(struct parse_events_state *parse_state, 1484 struct list_head *list, 1485 int tool_event) 1486 { 1487 return add_event_tool(list, &parse_state->idx, tool_event); 1488 } 1489 1490 static bool config_term_percore(struct list_head *config_terms) 1491 { 1492 struct evsel_config_term *term; 1493 1494 list_for_each_entry(term, config_terms, list) { 1495 if (term->type == EVSEL__CONFIG_TERM_PERCORE) 1496 return term->val.percore; 1497 } 1498 1499 return false; 1500 } 1501 1502 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state, 1503 struct list_head *list, char *name, 1504 struct list_head *head_config) 1505 { 1506 struct parse_events_term *term; 1507 int ret = -1; 1508 1509 if (parse_state->fake_pmu || !head_config || list_empty(head_config) || 1510 !perf_pmu__is_hybrid(name)) { 1511 return -1; 1512 } 1513 1514 /* 1515 * More than one term in list. 1516 */ 1517 if (head_config->next && head_config->next->next != head_config) 1518 return -1; 1519 1520 term = list_first_entry(head_config, struct parse_events_term, list); 1521 if (term && term->config && strcmp(term->config, "event")) { 1522 ret = parse_events__with_hybrid_pmu(parse_state, term->config, 1523 name, list); 1524 } 1525 1526 return ret; 1527 } 1528 1529 int parse_events_add_pmu(struct parse_events_state *parse_state, 1530 struct list_head *list, char *name, 1531 struct list_head *head_config, 1532 bool auto_merge_stats, 1533 bool use_alias) 1534 { 1535 struct perf_event_attr attr; 1536 struct perf_pmu_info info; 1537 struct perf_pmu *pmu; 1538 struct evsel *evsel; 1539 struct parse_events_error *err = parse_state->error; 1540 bool use_uncore_alias; 1541 LIST_HEAD(config_terms); 1542 1543 pmu = parse_state->fake_pmu ?: perf_pmu__find(name); 1544 1545 if (verbose > 1 && !(pmu && pmu->selectable)) { 1546 fprintf(stderr, "Attempting to add event pmu '%s' with '", 1547 name); 1548 if (head_config) { 1549 struct parse_events_term *term; 1550 1551 list_for_each_entry(term, head_config, list) { 1552 fprintf(stderr, "%s,", term->config); 1553 } 1554 } 1555 fprintf(stderr, "' that may result in non-fatal errors\n"); 1556 } 1557 1558 if (!pmu) { 1559 char *err_str; 1560 1561 if (asprintf(&err_str, 1562 "Cannot find PMU `%s'. Missing kernel support?", 1563 name) >= 0) 1564 parse_events_error__handle(err, 0, err_str, NULL); 1565 return -EINVAL; 1566 } 1567 1568 if (pmu->default_config) { 1569 memcpy(&attr, pmu->default_config, 1570 sizeof(struct perf_event_attr)); 1571 } else { 1572 memset(&attr, 0, sizeof(attr)); 1573 } 1574 1575 use_uncore_alias = (pmu->is_uncore && use_alias); 1576 1577 if (!head_config) { 1578 attr.type = pmu->type; 1579 evsel = __add_event(list, &parse_state->idx, &attr, 1580 /*init_attr=*/true, /*name=*/NULL, 1581 /*metric_id=*/NULL, pmu, 1582 /*config_terms=*/NULL, auto_merge_stats, 1583 /*cpu_list=*/NULL); 1584 if (evsel) { 1585 evsel->pmu_name = name ? strdup(name) : NULL; 1586 evsel->use_uncore_alias = use_uncore_alias; 1587 return 0; 1588 } else { 1589 return -ENOMEM; 1590 } 1591 } 1592 1593 if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info)) 1594 return -EINVAL; 1595 1596 if (verbose > 1) { 1597 fprintf(stderr, "After aliases, add event pmu '%s' with '", 1598 name); 1599 if (head_config) { 1600 struct parse_events_term *term; 1601 1602 list_for_each_entry(term, head_config, list) { 1603 fprintf(stderr, "%s,", term->config); 1604 } 1605 } 1606 fprintf(stderr, "' that may result in non-fatal errors\n"); 1607 } 1608 1609 /* 1610 * Configure hardcoded terms first, no need to check 1611 * return value when called with fail == 0 ;) 1612 */ 1613 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu)) 1614 return -EINVAL; 1615 1616 if (get_config_terms(head_config, &config_terms)) 1617 return -ENOMEM; 1618 1619 /* 1620 * When using default config, record which bits of attr->config were 1621 * changed by the user. 1622 */ 1623 if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms)) 1624 return -ENOMEM; 1625 1626 if (!parse_events__inside_hybrid_pmu(parse_state, list, name, 1627 head_config)) { 1628 return 0; 1629 } 1630 1631 if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) { 1632 free_config_terms(&config_terms); 1633 return -EINVAL; 1634 } 1635 1636 evsel = __add_event(list, &parse_state->idx, &attr, /*init_attr=*/true, 1637 get_config_name(head_config), 1638 get_config_metric_id(head_config), pmu, 1639 &config_terms, auto_merge_stats, /*cpu_list=*/NULL); 1640 if (!evsel) 1641 return -ENOMEM; 1642 1643 if (evsel->name) 1644 evsel->use_config_name = true; 1645 1646 evsel->pmu_name = name ? strdup(name) : NULL; 1647 evsel->use_uncore_alias = use_uncore_alias; 1648 evsel->percore = config_term_percore(&evsel->config_terms); 1649 1650 if (parse_state->fake_pmu) 1651 return 0; 1652 1653 free((char *)evsel->unit); 1654 evsel->unit = strdup(info.unit); 1655 evsel->scale = info.scale; 1656 evsel->per_pkg = info.per_pkg; 1657 evsel->snapshot = info.snapshot; 1658 evsel->metric_expr = info.metric_expr; 1659 evsel->metric_name = info.metric_name; 1660 return 0; 1661 } 1662 1663 int parse_events_multi_pmu_add(struct parse_events_state *parse_state, 1664 char *str, struct list_head *head, 1665 struct list_head **listp) 1666 { 1667 struct parse_events_term *term; 1668 struct list_head *list = NULL; 1669 struct list_head *orig_head = NULL; 1670 struct perf_pmu *pmu = NULL; 1671 int ok = 0; 1672 char *config; 1673 1674 *listp = NULL; 1675 1676 if (!head) { 1677 head = malloc(sizeof(struct list_head)); 1678 if (!head) 1679 goto out_err; 1680 1681 INIT_LIST_HEAD(head); 1682 } 1683 config = strdup(str); 1684 if (!config) 1685 goto out_err; 1686 1687 if (parse_events_term__num(&term, 1688 PARSE_EVENTS__TERM_TYPE_USER, 1689 config, 1, false, &config, 1690 NULL) < 0) { 1691 free(config); 1692 goto out_err; 1693 } 1694 list_add_tail(&term->list, head); 1695 1696 /* Add it for all PMUs that support the alias */ 1697 list = malloc(sizeof(struct list_head)); 1698 if (!list) 1699 goto out_err; 1700 1701 INIT_LIST_HEAD(list); 1702 1703 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1704 struct perf_pmu_alias *alias; 1705 1706 list_for_each_entry(alias, &pmu->aliases, list) { 1707 if (!strcasecmp(alias->name, str)) { 1708 parse_events_copy_term_list(head, &orig_head); 1709 if (!parse_events_add_pmu(parse_state, list, 1710 pmu->name, orig_head, 1711 true, true)) { 1712 pr_debug("%s -> %s/%s/\n", str, 1713 pmu->name, alias->str); 1714 ok++; 1715 } 1716 parse_events_terms__delete(orig_head); 1717 } 1718 } 1719 } 1720 1721 if (parse_state->fake_pmu) { 1722 if (!parse_events_add_pmu(parse_state, list, str, head, 1723 true, true)) { 1724 pr_debug("%s -> %s/%s/\n", str, "fake_pmu", str); 1725 ok++; 1726 } 1727 } 1728 1729 out_err: 1730 if (ok) 1731 *listp = list; 1732 else 1733 free(list); 1734 1735 parse_events_terms__delete(head); 1736 return ok ? 0 : -1; 1737 } 1738 1739 int parse_events__modifier_group(struct list_head *list, 1740 char *event_mod) 1741 { 1742 return parse_events__modifier_event(list, event_mod, true); 1743 } 1744 1745 /* 1746 * Check if the two uncore PMUs are from the same uncore block 1747 * The format of the uncore PMU name is uncore_#blockname_#pmuidx 1748 */ 1749 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b) 1750 { 1751 char *end_a, *end_b; 1752 1753 end_a = strrchr(pmu_name_a, '_'); 1754 end_b = strrchr(pmu_name_b, '_'); 1755 1756 if (!end_a || !end_b) 1757 return false; 1758 1759 if ((end_a - pmu_name_a) != (end_b - pmu_name_b)) 1760 return false; 1761 1762 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0); 1763 } 1764 1765 static int 1766 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list, 1767 struct parse_events_state *parse_state) 1768 { 1769 struct evsel *evsel, *leader; 1770 uintptr_t *leaders; 1771 bool is_leader = true; 1772 int i, nr_pmu = 0, total_members, ret = 0; 1773 1774 leader = list_first_entry(list, struct evsel, core.node); 1775 evsel = list_last_entry(list, struct evsel, core.node); 1776 total_members = evsel->core.idx - leader->core.idx + 1; 1777 1778 leaders = calloc(total_members, sizeof(uintptr_t)); 1779 if (WARN_ON(!leaders)) 1780 return 0; 1781 1782 /* 1783 * Going through the whole group and doing sanity check. 1784 * All members must use alias, and be from the same uncore block. 1785 * Also, storing the leader events in an array. 1786 */ 1787 __evlist__for_each_entry(list, evsel) { 1788 1789 /* Only split the uncore group which members use alias */ 1790 if (!evsel->use_uncore_alias) 1791 goto out; 1792 1793 /* The events must be from the same uncore block */ 1794 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name)) 1795 goto out; 1796 1797 if (!is_leader) 1798 continue; 1799 /* 1800 * If the event's PMU name starts to repeat, it must be a new 1801 * event. That can be used to distinguish the leader from 1802 * other members, even they have the same event name. 1803 */ 1804 if ((leader != evsel) && 1805 !strcmp(leader->pmu_name, evsel->pmu_name)) { 1806 is_leader = false; 1807 continue; 1808 } 1809 1810 /* Store the leader event for each PMU */ 1811 leaders[nr_pmu++] = (uintptr_t) evsel; 1812 } 1813 1814 /* only one event alias */ 1815 if (nr_pmu == total_members) { 1816 parse_state->nr_groups--; 1817 goto handled; 1818 } 1819 1820 /* 1821 * An uncore event alias is a joint name which means the same event 1822 * runs on all PMUs of a block. 1823 * Perf doesn't support mixed events from different PMUs in the same 1824 * group. The big group has to be split into multiple small groups 1825 * which only include the events from the same PMU. 1826 * 1827 * Here the uncore event aliases must be from the same uncore block. 1828 * The number of PMUs must be same for each alias. The number of new 1829 * small groups equals to the number of PMUs. 1830 * Setting the leader event for corresponding members in each group. 1831 */ 1832 i = 0; 1833 __evlist__for_each_entry(list, evsel) { 1834 if (i >= nr_pmu) 1835 i = 0; 1836 evsel__set_leader(evsel, (struct evsel *) leaders[i++]); 1837 } 1838 1839 /* The number of members and group name are same for each group */ 1840 for (i = 0; i < nr_pmu; i++) { 1841 evsel = (struct evsel *) leaders[i]; 1842 evsel->core.nr_members = total_members / nr_pmu; 1843 evsel->group_name = name ? strdup(name) : NULL; 1844 } 1845 1846 /* Take the new small groups into account */ 1847 parse_state->nr_groups += nr_pmu - 1; 1848 1849 handled: 1850 ret = 1; 1851 out: 1852 free(leaders); 1853 return ret; 1854 } 1855 1856 __weak struct evsel *arch_evlist__leader(struct list_head *list) 1857 { 1858 return list_first_entry(list, struct evsel, core.node); 1859 } 1860 1861 void parse_events__set_leader(char *name, struct list_head *list, 1862 struct parse_events_state *parse_state) 1863 { 1864 struct evsel *leader; 1865 1866 if (list_empty(list)) { 1867 WARN_ONCE(true, "WARNING: failed to set leader: empty list"); 1868 return; 1869 } 1870 1871 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) 1872 return; 1873 1874 leader = arch_evlist__leader(list); 1875 __perf_evlist__set_leader(list, &leader->core); 1876 leader->group_name = name ? strdup(name) : NULL; 1877 list_move(&leader->core.node, list); 1878 } 1879 1880 /* list_event is assumed to point to malloc'ed memory */ 1881 void parse_events_update_lists(struct list_head *list_event, 1882 struct list_head *list_all) 1883 { 1884 /* 1885 * Called for single event definition. Update the 1886 * 'all event' list, and reinit the 'single event' 1887 * list, for next event definition. 1888 */ 1889 list_splice_tail(list_event, list_all); 1890 free(list_event); 1891 } 1892 1893 struct event_modifier { 1894 int eu; 1895 int ek; 1896 int eh; 1897 int eH; 1898 int eG; 1899 int eI; 1900 int precise; 1901 int precise_max; 1902 int exclude_GH; 1903 int sample_read; 1904 int pinned; 1905 int weak; 1906 int exclusive; 1907 int bpf_counter; 1908 }; 1909 1910 static int get_event_modifier(struct event_modifier *mod, char *str, 1911 struct evsel *evsel) 1912 { 1913 int eu = evsel ? evsel->core.attr.exclude_user : 0; 1914 int ek = evsel ? evsel->core.attr.exclude_kernel : 0; 1915 int eh = evsel ? evsel->core.attr.exclude_hv : 0; 1916 int eH = evsel ? evsel->core.attr.exclude_host : 0; 1917 int eG = evsel ? evsel->core.attr.exclude_guest : 0; 1918 int eI = evsel ? evsel->core.attr.exclude_idle : 0; 1919 int precise = evsel ? evsel->core.attr.precise_ip : 0; 1920 int precise_max = 0; 1921 int sample_read = 0; 1922 int pinned = evsel ? evsel->core.attr.pinned : 0; 1923 int exclusive = evsel ? evsel->core.attr.exclusive : 0; 1924 1925 int exclude = eu | ek | eh; 1926 int exclude_GH = evsel ? evsel->exclude_GH : 0; 1927 int weak = 0; 1928 int bpf_counter = 0; 1929 1930 memset(mod, 0, sizeof(*mod)); 1931 1932 while (*str) { 1933 if (*str == 'u') { 1934 if (!exclude) 1935 exclude = eu = ek = eh = 1; 1936 if (!exclude_GH && !perf_guest) 1937 eG = 1; 1938 eu = 0; 1939 } else if (*str == 'k') { 1940 if (!exclude) 1941 exclude = eu = ek = eh = 1; 1942 ek = 0; 1943 } else if (*str == 'h') { 1944 if (!exclude) 1945 exclude = eu = ek = eh = 1; 1946 eh = 0; 1947 } else if (*str == 'G') { 1948 if (!exclude_GH) 1949 exclude_GH = eG = eH = 1; 1950 eG = 0; 1951 } else if (*str == 'H') { 1952 if (!exclude_GH) 1953 exclude_GH = eG = eH = 1; 1954 eH = 0; 1955 } else if (*str == 'I') { 1956 eI = 1; 1957 } else if (*str == 'p') { 1958 precise++; 1959 /* use of precise requires exclude_guest */ 1960 if (!exclude_GH) 1961 eG = 1; 1962 } else if (*str == 'P') { 1963 precise_max = 1; 1964 } else if (*str == 'S') { 1965 sample_read = 1; 1966 } else if (*str == 'D') { 1967 pinned = 1; 1968 } else if (*str == 'e') { 1969 exclusive = 1; 1970 } else if (*str == 'W') { 1971 weak = 1; 1972 } else if (*str == 'b') { 1973 bpf_counter = 1; 1974 } else 1975 break; 1976 1977 ++str; 1978 } 1979 1980 /* 1981 * precise ip: 1982 * 1983 * 0 - SAMPLE_IP can have arbitrary skid 1984 * 1 - SAMPLE_IP must have constant skid 1985 * 2 - SAMPLE_IP requested to have 0 skid 1986 * 3 - SAMPLE_IP must have 0 skid 1987 * 1988 * See also PERF_RECORD_MISC_EXACT_IP 1989 */ 1990 if (precise > 3) 1991 return -EINVAL; 1992 1993 mod->eu = eu; 1994 mod->ek = ek; 1995 mod->eh = eh; 1996 mod->eH = eH; 1997 mod->eG = eG; 1998 mod->eI = eI; 1999 mod->precise = precise; 2000 mod->precise_max = precise_max; 2001 mod->exclude_GH = exclude_GH; 2002 mod->sample_read = sample_read; 2003 mod->pinned = pinned; 2004 mod->weak = weak; 2005 mod->bpf_counter = bpf_counter; 2006 mod->exclusive = exclusive; 2007 2008 return 0; 2009 } 2010 2011 /* 2012 * Basic modifier sanity check to validate it contains only one 2013 * instance of any modifier (apart from 'p') present. 2014 */ 2015 static int check_modifier(char *str) 2016 { 2017 char *p = str; 2018 2019 /* The sizeof includes 0 byte as well. */ 2020 if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1)) 2021 return -1; 2022 2023 while (*p) { 2024 if (*p != 'p' && strchr(p + 1, *p)) 2025 return -1; 2026 p++; 2027 } 2028 2029 return 0; 2030 } 2031 2032 int parse_events__modifier_event(struct list_head *list, char *str, bool add) 2033 { 2034 struct evsel *evsel; 2035 struct event_modifier mod; 2036 2037 if (str == NULL) 2038 return 0; 2039 2040 if (check_modifier(str)) 2041 return -EINVAL; 2042 2043 if (!add && get_event_modifier(&mod, str, NULL)) 2044 return -EINVAL; 2045 2046 __evlist__for_each_entry(list, evsel) { 2047 if (add && get_event_modifier(&mod, str, evsel)) 2048 return -EINVAL; 2049 2050 evsel->core.attr.exclude_user = mod.eu; 2051 evsel->core.attr.exclude_kernel = mod.ek; 2052 evsel->core.attr.exclude_hv = mod.eh; 2053 evsel->core.attr.precise_ip = mod.precise; 2054 evsel->core.attr.exclude_host = mod.eH; 2055 evsel->core.attr.exclude_guest = mod.eG; 2056 evsel->core.attr.exclude_idle = mod.eI; 2057 evsel->exclude_GH = mod.exclude_GH; 2058 evsel->sample_read = mod.sample_read; 2059 evsel->precise_max = mod.precise_max; 2060 evsel->weak_group = mod.weak; 2061 evsel->bpf_counter = mod.bpf_counter; 2062 2063 if (evsel__is_group_leader(evsel)) { 2064 evsel->core.attr.pinned = mod.pinned; 2065 evsel->core.attr.exclusive = mod.exclusive; 2066 } 2067 } 2068 2069 return 0; 2070 } 2071 2072 int parse_events_name(struct list_head *list, const char *name) 2073 { 2074 struct evsel *evsel; 2075 2076 __evlist__for_each_entry(list, evsel) { 2077 if (!evsel->name) 2078 evsel->name = strdup(name); 2079 } 2080 2081 return 0; 2082 } 2083 2084 static int 2085 comp_pmu(const void *p1, const void *p2) 2086 { 2087 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; 2088 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; 2089 2090 return strcasecmp(pmu1->symbol, pmu2->symbol); 2091 } 2092 2093 static void perf_pmu__parse_cleanup(void) 2094 { 2095 if (perf_pmu_events_list_num > 0) { 2096 struct perf_pmu_event_symbol *p; 2097 int i; 2098 2099 for (i = 0; i < perf_pmu_events_list_num; i++) { 2100 p = perf_pmu_events_list + i; 2101 zfree(&p->symbol); 2102 } 2103 zfree(&perf_pmu_events_list); 2104 perf_pmu_events_list_num = 0; 2105 } 2106 } 2107 2108 #define SET_SYMBOL(str, stype) \ 2109 do { \ 2110 p->symbol = str; \ 2111 if (!p->symbol) \ 2112 goto err; \ 2113 p->type = stype; \ 2114 } while (0) 2115 2116 /* 2117 * Read the pmu events list from sysfs 2118 * Save it into perf_pmu_events_list 2119 */ 2120 static void perf_pmu__parse_init(void) 2121 { 2122 2123 struct perf_pmu *pmu = NULL; 2124 struct perf_pmu_alias *alias; 2125 int len = 0; 2126 2127 pmu = NULL; 2128 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2129 list_for_each_entry(alias, &pmu->aliases, list) { 2130 char *tmp = strchr(alias->name, '-'); 2131 2132 if (tmp) { 2133 char *tmp2 = NULL; 2134 2135 tmp2 = strchr(tmp + 1, '-'); 2136 len++; 2137 if (tmp2) 2138 len++; 2139 } 2140 2141 len++; 2142 } 2143 } 2144 2145 if (len == 0) { 2146 perf_pmu_events_list_num = -1; 2147 return; 2148 } 2149 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); 2150 if (!perf_pmu_events_list) 2151 return; 2152 perf_pmu_events_list_num = len; 2153 2154 len = 0; 2155 pmu = NULL; 2156 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 2157 list_for_each_entry(alias, &pmu->aliases, list) { 2158 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; 2159 char *tmp = strchr(alias->name, '-'); 2160 char *tmp2 = NULL; 2161 2162 if (tmp) 2163 tmp2 = strchr(tmp + 1, '-'); 2164 if (tmp2) { 2165 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 2166 PMU_EVENT_SYMBOL_PREFIX); 2167 p++; 2168 tmp++; 2169 SET_SYMBOL(strndup(tmp, tmp2 - tmp), PMU_EVENT_SYMBOL_SUFFIX); 2170 p++; 2171 SET_SYMBOL(strdup(++tmp2), PMU_EVENT_SYMBOL_SUFFIX2); 2172 len += 3; 2173 } else if (tmp) { 2174 SET_SYMBOL(strndup(alias->name, tmp - alias->name), 2175 PMU_EVENT_SYMBOL_PREFIX); 2176 p++; 2177 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); 2178 len += 2; 2179 } else { 2180 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); 2181 len++; 2182 } 2183 } 2184 } 2185 qsort(perf_pmu_events_list, len, 2186 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2187 2188 return; 2189 err: 2190 perf_pmu__parse_cleanup(); 2191 } 2192 2193 /* 2194 * This function injects special term in 2195 * perf_pmu_events_list so the test code 2196 * can check on this functionality. 2197 */ 2198 int perf_pmu__test_parse_init(void) 2199 { 2200 struct perf_pmu_event_symbol *list, *tmp, symbols[] = { 2201 {(char *)"read", PMU_EVENT_SYMBOL}, 2202 {(char *)"event", PMU_EVENT_SYMBOL_PREFIX}, 2203 {(char *)"two", PMU_EVENT_SYMBOL_SUFFIX}, 2204 {(char *)"hyphen", PMU_EVENT_SYMBOL_SUFFIX}, 2205 {(char *)"hyph", PMU_EVENT_SYMBOL_SUFFIX2}, 2206 }; 2207 unsigned long i, j; 2208 2209 tmp = list = malloc(sizeof(*list) * ARRAY_SIZE(symbols)); 2210 if (!list) 2211 return -ENOMEM; 2212 2213 for (i = 0; i < ARRAY_SIZE(symbols); i++, tmp++) { 2214 tmp->type = symbols[i].type; 2215 tmp->symbol = strdup(symbols[i].symbol); 2216 if (!tmp->symbol) 2217 goto err_free; 2218 } 2219 2220 perf_pmu_events_list = list; 2221 perf_pmu_events_list_num = ARRAY_SIZE(symbols); 2222 2223 qsort(perf_pmu_events_list, ARRAY_SIZE(symbols), 2224 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2225 return 0; 2226 2227 err_free: 2228 for (j = 0, tmp = list; j < i; j++, tmp++) 2229 free(tmp->symbol); 2230 free(list); 2231 return -ENOMEM; 2232 } 2233 2234 enum perf_pmu_event_symbol_type 2235 perf_pmu__parse_check(const char *name) 2236 { 2237 struct perf_pmu_event_symbol p, *r; 2238 2239 /* scan kernel pmu events from sysfs if needed */ 2240 if (perf_pmu_events_list_num == 0) 2241 perf_pmu__parse_init(); 2242 /* 2243 * name "cpu" could be prefix of cpu-cycles or cpu// events. 2244 * cpu-cycles has been handled by hardcode. 2245 * So it must be cpu// events, not kernel pmu event. 2246 */ 2247 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) 2248 return PMU_EVENT_SYMBOL_ERR; 2249 2250 p.symbol = strdup(name); 2251 r = bsearch(&p, perf_pmu_events_list, 2252 (size_t) perf_pmu_events_list_num, 2253 sizeof(struct perf_pmu_event_symbol), comp_pmu); 2254 zfree(&p.symbol); 2255 return r ? r->type : PMU_EVENT_SYMBOL_ERR; 2256 } 2257 2258 static int parse_events__scanner(const char *str, 2259 struct parse_events_state *parse_state) 2260 { 2261 YY_BUFFER_STATE buffer; 2262 void *scanner; 2263 int ret; 2264 2265 ret = parse_events_lex_init_extra(parse_state, &scanner); 2266 if (ret) 2267 return ret; 2268 2269 buffer = parse_events__scan_string(str, scanner); 2270 2271 #ifdef PARSER_DEBUG 2272 parse_events_debug = 1; 2273 parse_events_set_debug(1, scanner); 2274 #endif 2275 ret = parse_events_parse(parse_state, scanner); 2276 2277 parse_events__flush_buffer(buffer, scanner); 2278 parse_events__delete_buffer(buffer, scanner); 2279 parse_events_lex_destroy(scanner); 2280 return ret; 2281 } 2282 2283 /* 2284 * parse event config string, return a list of event terms. 2285 */ 2286 int parse_events_terms(struct list_head *terms, const char *str) 2287 { 2288 struct parse_events_state parse_state = { 2289 .terms = NULL, 2290 .stoken = PE_START_TERMS, 2291 }; 2292 int ret; 2293 2294 ret = parse_events__scanner(str, &parse_state); 2295 perf_pmu__parse_cleanup(); 2296 2297 if (!ret) { 2298 list_splice(parse_state.terms, terms); 2299 zfree(&parse_state.terms); 2300 return 0; 2301 } 2302 2303 parse_events_terms__delete(parse_state.terms); 2304 return ret; 2305 } 2306 2307 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state, 2308 const char *str, char *pmu_name, 2309 struct list_head *list) 2310 { 2311 struct parse_events_state ps = { 2312 .list = LIST_HEAD_INIT(ps.list), 2313 .stoken = PE_START_EVENTS, 2314 .hybrid_pmu_name = pmu_name, 2315 .idx = parse_state->idx, 2316 }; 2317 int ret; 2318 2319 ret = parse_events__scanner(str, &ps); 2320 perf_pmu__parse_cleanup(); 2321 2322 if (!ret) { 2323 if (!list_empty(&ps.list)) { 2324 list_splice(&ps.list, list); 2325 parse_state->idx = ps.idx; 2326 return 0; 2327 } else 2328 return -1; 2329 } 2330 2331 return ret; 2332 } 2333 2334 int __parse_events(struct evlist *evlist, const char *str, 2335 struct parse_events_error *err, struct perf_pmu *fake_pmu) 2336 { 2337 struct parse_events_state parse_state = { 2338 .list = LIST_HEAD_INIT(parse_state.list), 2339 .idx = evlist->core.nr_entries, 2340 .error = err, 2341 .evlist = evlist, 2342 .stoken = PE_START_EVENTS, 2343 .fake_pmu = fake_pmu, 2344 }; 2345 int ret; 2346 2347 ret = parse_events__scanner(str, &parse_state); 2348 perf_pmu__parse_cleanup(); 2349 2350 if (!ret && list_empty(&parse_state.list)) { 2351 WARN_ONCE(true, "WARNING: event parser found nothing\n"); 2352 return -1; 2353 } 2354 2355 /* 2356 * Add list to the evlist even with errors to allow callers to clean up. 2357 */ 2358 evlist__splice_list_tail(evlist, &parse_state.list); 2359 2360 if (!ret) { 2361 struct evsel *last; 2362 2363 evlist->core.nr_groups += parse_state.nr_groups; 2364 last = evlist__last(evlist); 2365 last->cmdline_group_boundary = true; 2366 2367 return 0; 2368 } 2369 2370 /* 2371 * There are 2 users - builtin-record and builtin-test objects. 2372 * Both call evlist__delete in case of error, so we dont 2373 * need to bother. 2374 */ 2375 return ret; 2376 } 2377 2378 void parse_events_error__init(struct parse_events_error *err) 2379 { 2380 bzero(err, sizeof(*err)); 2381 } 2382 2383 void parse_events_error__exit(struct parse_events_error *err) 2384 { 2385 zfree(&err->str); 2386 zfree(&err->help); 2387 zfree(&err->first_str); 2388 zfree(&err->first_help); 2389 } 2390 2391 void parse_events_error__handle(struct parse_events_error *err, int idx, 2392 char *str, char *help) 2393 { 2394 if (WARN(!str, "WARNING: failed to provide error string\n")) { 2395 free(help); 2396 return; 2397 } 2398 switch (err->num_errors) { 2399 case 0: 2400 err->idx = idx; 2401 err->str = str; 2402 err->help = help; 2403 break; 2404 case 1: 2405 err->first_idx = err->idx; 2406 err->idx = idx; 2407 err->first_str = err->str; 2408 err->str = str; 2409 err->first_help = err->help; 2410 err->help = help; 2411 break; 2412 default: 2413 pr_debug("Multiple errors dropping message: %s (%s)\n", 2414 err->str, err->help); 2415 free(err->str); 2416 err->str = str; 2417 free(err->help); 2418 err->help = help; 2419 break; 2420 } 2421 err->num_errors++; 2422 } 2423 2424 #define MAX_WIDTH 1000 2425 static int get_term_width(void) 2426 { 2427 struct winsize ws; 2428 2429 get_term_dimensions(&ws); 2430 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; 2431 } 2432 2433 static void __parse_events_error__print(int err_idx, const char *err_str, 2434 const char *err_help, const char *event) 2435 { 2436 const char *str = "invalid or unsupported event: "; 2437 char _buf[MAX_WIDTH]; 2438 char *buf = (char *) event; 2439 int idx = 0; 2440 if (err_str) { 2441 /* -2 for extra '' in the final fprintf */ 2442 int width = get_term_width() - 2; 2443 int len_event = strlen(event); 2444 int len_str, max_len, cut = 0; 2445 2446 /* 2447 * Maximum error index indent, we will cut 2448 * the event string if it's bigger. 2449 */ 2450 int max_err_idx = 13; 2451 2452 /* 2453 * Let's be specific with the message when 2454 * we have the precise error. 2455 */ 2456 str = "event syntax error: "; 2457 len_str = strlen(str); 2458 max_len = width - len_str; 2459 2460 buf = _buf; 2461 2462 /* We're cutting from the beginning. */ 2463 if (err_idx > max_err_idx) 2464 cut = err_idx - max_err_idx; 2465 2466 strncpy(buf, event + cut, max_len); 2467 2468 /* Mark cut parts with '..' on both sides. */ 2469 if (cut) 2470 buf[0] = buf[1] = '.'; 2471 2472 if ((len_event - cut) > max_len) { 2473 buf[max_len - 1] = buf[max_len - 2] = '.'; 2474 buf[max_len] = 0; 2475 } 2476 2477 idx = len_str + err_idx - cut; 2478 } 2479 2480 fprintf(stderr, "%s'%s'\n", str, buf); 2481 if (idx) { 2482 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str); 2483 if (err_help) 2484 fprintf(stderr, "\n%s\n", err_help); 2485 } 2486 } 2487 2488 void parse_events_error__print(struct parse_events_error *err, 2489 const char *event) 2490 { 2491 if (!err->num_errors) 2492 return; 2493 2494 __parse_events_error__print(err->idx, err->str, err->help, event); 2495 2496 if (err->num_errors > 1) { 2497 fputs("\nInitial error:\n", stderr); 2498 __parse_events_error__print(err->first_idx, err->first_str, 2499 err->first_help, event); 2500 } 2501 } 2502 2503 #undef MAX_WIDTH 2504 2505 int parse_events_option(const struct option *opt, const char *str, 2506 int unset __maybe_unused) 2507 { 2508 struct evlist *evlist = *(struct evlist **)opt->value; 2509 struct parse_events_error err; 2510 int ret; 2511 2512 parse_events_error__init(&err); 2513 ret = parse_events(evlist, str, &err); 2514 2515 if (ret) { 2516 parse_events_error__print(&err, str); 2517 fprintf(stderr, "Run 'perf list' for a list of valid events\n"); 2518 } 2519 parse_events_error__exit(&err); 2520 2521 return ret; 2522 } 2523 2524 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset) 2525 { 2526 struct evlist **evlistp = opt->value; 2527 int ret; 2528 2529 if (*evlistp == NULL) { 2530 *evlistp = evlist__new(); 2531 2532 if (*evlistp == NULL) { 2533 fprintf(stderr, "Not enough memory to create evlist\n"); 2534 return -1; 2535 } 2536 } 2537 2538 ret = parse_events_option(opt, str, unset); 2539 if (ret) { 2540 evlist__delete(*evlistp); 2541 *evlistp = NULL; 2542 } 2543 2544 return ret; 2545 } 2546 2547 static int 2548 foreach_evsel_in_last_glob(struct evlist *evlist, 2549 int (*func)(struct evsel *evsel, 2550 const void *arg), 2551 const void *arg) 2552 { 2553 struct evsel *last = NULL; 2554 int err; 2555 2556 /* 2557 * Don't return when list_empty, give func a chance to report 2558 * error when it found last == NULL. 2559 * 2560 * So no need to WARN here, let *func do this. 2561 */ 2562 if (evlist->core.nr_entries > 0) 2563 last = evlist__last(evlist); 2564 2565 do { 2566 err = (*func)(last, arg); 2567 if (err) 2568 return -1; 2569 if (!last) 2570 return 0; 2571 2572 if (last->core.node.prev == &evlist->core.entries) 2573 return 0; 2574 last = list_entry(last->core.node.prev, struct evsel, core.node); 2575 } while (!last->cmdline_group_boundary); 2576 2577 return 0; 2578 } 2579 2580 static int set_filter(struct evsel *evsel, const void *arg) 2581 { 2582 const char *str = arg; 2583 bool found = false; 2584 int nr_addr_filters = 0; 2585 struct perf_pmu *pmu = NULL; 2586 2587 if (evsel == NULL) { 2588 fprintf(stderr, 2589 "--filter option should follow a -e tracepoint or HW tracer option\n"); 2590 return -1; 2591 } 2592 2593 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) { 2594 if (evsel__append_tp_filter(evsel, str) < 0) { 2595 fprintf(stderr, 2596 "not enough memory to hold filter string\n"); 2597 return -1; 2598 } 2599 2600 return 0; 2601 } 2602 2603 while ((pmu = perf_pmu__scan(pmu)) != NULL) 2604 if (pmu->type == evsel->core.attr.type) { 2605 found = true; 2606 break; 2607 } 2608 2609 if (found) 2610 perf_pmu__scan_file(pmu, "nr_addr_filters", 2611 "%d", &nr_addr_filters); 2612 2613 if (!nr_addr_filters) { 2614 fprintf(stderr, 2615 "This CPU does not support address filtering\n"); 2616 return -1; 2617 } 2618 2619 if (evsel__append_addr_filter(evsel, str) < 0) { 2620 fprintf(stderr, 2621 "not enough memory to hold filter string\n"); 2622 return -1; 2623 } 2624 2625 return 0; 2626 } 2627 2628 int parse_filter(const struct option *opt, const char *str, 2629 int unset __maybe_unused) 2630 { 2631 struct evlist *evlist = *(struct evlist **)opt->value; 2632 2633 return foreach_evsel_in_last_glob(evlist, set_filter, 2634 (const void *)str); 2635 } 2636 2637 static int add_exclude_perf_filter(struct evsel *evsel, 2638 const void *arg __maybe_unused) 2639 { 2640 char new_filter[64]; 2641 2642 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) { 2643 fprintf(stderr, 2644 "--exclude-perf option should follow a -e tracepoint option\n"); 2645 return -1; 2646 } 2647 2648 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid()); 2649 2650 if (evsel__append_tp_filter(evsel, new_filter) < 0) { 2651 fprintf(stderr, 2652 "not enough memory to hold filter string\n"); 2653 return -1; 2654 } 2655 2656 return 0; 2657 } 2658 2659 int exclude_perf(const struct option *opt, 2660 const char *arg __maybe_unused, 2661 int unset __maybe_unused) 2662 { 2663 struct evlist *evlist = *(struct evlist **)opt->value; 2664 2665 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter, 2666 NULL); 2667 } 2668 2669 static const char * const event_type_descriptors[] = { 2670 "Hardware event", 2671 "Software event", 2672 "Tracepoint event", 2673 "Hardware cache event", 2674 "Raw hardware event descriptor", 2675 "Hardware breakpoint", 2676 }; 2677 2678 static int cmp_string(const void *a, const void *b) 2679 { 2680 const char * const *as = a; 2681 const char * const *bs = b; 2682 2683 return strcmp(*as, *bs); 2684 } 2685 2686 /* 2687 * Print the events from <debugfs_mount_point>/tracing/events 2688 */ 2689 2690 void print_tracepoint_events(const char *subsys_glob, const char *event_glob, 2691 bool name_only) 2692 { 2693 DIR *sys_dir, *evt_dir; 2694 struct dirent *sys_dirent, *evt_dirent; 2695 char evt_path[MAXPATHLEN]; 2696 char *dir_path; 2697 char **evt_list = NULL; 2698 unsigned int evt_i = 0, evt_num = 0; 2699 bool evt_num_known = false; 2700 2701 restart: 2702 sys_dir = tracing_events__opendir(); 2703 if (!sys_dir) 2704 return; 2705 2706 if (evt_num_known) { 2707 evt_list = zalloc(sizeof(char *) * evt_num); 2708 if (!evt_list) 2709 goto out_close_sys_dir; 2710 } 2711 2712 for_each_subsystem(sys_dir, sys_dirent) { 2713 if (subsys_glob != NULL && 2714 !strglobmatch(sys_dirent->d_name, subsys_glob)) 2715 continue; 2716 2717 dir_path = get_events_file(sys_dirent->d_name); 2718 if (!dir_path) 2719 continue; 2720 evt_dir = opendir(dir_path); 2721 if (!evt_dir) 2722 goto next; 2723 2724 for_each_event(dir_path, evt_dir, evt_dirent) { 2725 if (event_glob != NULL && 2726 !strglobmatch(evt_dirent->d_name, event_glob)) 2727 continue; 2728 2729 if (!evt_num_known) { 2730 evt_num++; 2731 continue; 2732 } 2733 2734 snprintf(evt_path, MAXPATHLEN, "%s:%s", 2735 sys_dirent->d_name, evt_dirent->d_name); 2736 2737 evt_list[evt_i] = strdup(evt_path); 2738 if (evt_list[evt_i] == NULL) { 2739 put_events_file(dir_path); 2740 goto out_close_evt_dir; 2741 } 2742 evt_i++; 2743 } 2744 closedir(evt_dir); 2745 next: 2746 put_events_file(dir_path); 2747 } 2748 closedir(sys_dir); 2749 2750 if (!evt_num_known) { 2751 evt_num_known = true; 2752 goto restart; 2753 } 2754 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 2755 evt_i = 0; 2756 while (evt_i < evt_num) { 2757 if (name_only) { 2758 printf("%s ", evt_list[evt_i++]); 2759 continue; 2760 } 2761 printf(" %-50s [%s]\n", evt_list[evt_i++], 2762 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 2763 } 2764 if (evt_num && pager_in_use()) 2765 printf("\n"); 2766 2767 out_free: 2768 evt_num = evt_i; 2769 for (evt_i = 0; evt_i < evt_num; evt_i++) 2770 zfree(&evt_list[evt_i]); 2771 zfree(&evt_list); 2772 return; 2773 2774 out_close_evt_dir: 2775 closedir(evt_dir); 2776 out_close_sys_dir: 2777 closedir(sys_dir); 2778 2779 printf("FATAL: not enough memory to print %s\n", 2780 event_type_descriptors[PERF_TYPE_TRACEPOINT]); 2781 if (evt_list) 2782 goto out_free; 2783 } 2784 2785 /* 2786 * Check whether event is in <debugfs_mount_point>/tracing/events 2787 */ 2788 2789 int is_valid_tracepoint(const char *event_string) 2790 { 2791 DIR *sys_dir, *evt_dir; 2792 struct dirent *sys_dirent, *evt_dirent; 2793 char evt_path[MAXPATHLEN]; 2794 char *dir_path; 2795 2796 sys_dir = tracing_events__opendir(); 2797 if (!sys_dir) 2798 return 0; 2799 2800 for_each_subsystem(sys_dir, sys_dirent) { 2801 dir_path = get_events_file(sys_dirent->d_name); 2802 if (!dir_path) 2803 continue; 2804 evt_dir = opendir(dir_path); 2805 if (!evt_dir) 2806 goto next; 2807 2808 for_each_event(dir_path, evt_dir, evt_dirent) { 2809 snprintf(evt_path, MAXPATHLEN, "%s:%s", 2810 sys_dirent->d_name, evt_dirent->d_name); 2811 if (!strcmp(evt_path, event_string)) { 2812 closedir(evt_dir); 2813 closedir(sys_dir); 2814 return 1; 2815 } 2816 } 2817 closedir(evt_dir); 2818 next: 2819 put_events_file(dir_path); 2820 } 2821 closedir(sys_dir); 2822 return 0; 2823 } 2824 2825 static bool is_event_supported(u8 type, u64 config) 2826 { 2827 bool ret = true; 2828 int open_return; 2829 struct evsel *evsel; 2830 struct perf_event_attr attr = { 2831 .type = type, 2832 .config = config, 2833 .disabled = 1, 2834 }; 2835 struct perf_thread_map *tmap = thread_map__new_by_tid(0); 2836 2837 if (tmap == NULL) 2838 return false; 2839 2840 evsel = evsel__new(&attr); 2841 if (evsel) { 2842 open_return = evsel__open(evsel, NULL, tmap); 2843 ret = open_return >= 0; 2844 2845 if (open_return == -EACCES) { 2846 /* 2847 * This happens if the paranoid value 2848 * /proc/sys/kernel/perf_event_paranoid is set to 2 2849 * Re-run with exclude_kernel set; we don't do that 2850 * by default as some ARM machines do not support it. 2851 * 2852 */ 2853 evsel->core.attr.exclude_kernel = 1; 2854 ret = evsel__open(evsel, NULL, tmap) >= 0; 2855 } 2856 evsel__delete(evsel); 2857 } 2858 2859 perf_thread_map__put(tmap); 2860 return ret; 2861 } 2862 2863 void print_sdt_events(const char *subsys_glob, const char *event_glob, 2864 bool name_only) 2865 { 2866 struct probe_cache *pcache; 2867 struct probe_cache_entry *ent; 2868 struct strlist *bidlist, *sdtlist; 2869 struct strlist_config cfg = {.dont_dupstr = true}; 2870 struct str_node *nd, *nd2; 2871 char *buf, *path, *ptr = NULL; 2872 bool show_detail = false; 2873 int ret; 2874 2875 sdtlist = strlist__new(NULL, &cfg); 2876 if (!sdtlist) { 2877 pr_debug("Failed to allocate new strlist for SDT\n"); 2878 return; 2879 } 2880 bidlist = build_id_cache__list_all(true); 2881 if (!bidlist) { 2882 pr_debug("Failed to get buildids: %d\n", errno); 2883 return; 2884 } 2885 strlist__for_each_entry(nd, bidlist) { 2886 pcache = probe_cache__new(nd->s, NULL); 2887 if (!pcache) 2888 continue; 2889 list_for_each_entry(ent, &pcache->entries, node) { 2890 if (!ent->sdt) 2891 continue; 2892 if (subsys_glob && 2893 !strglobmatch(ent->pev.group, subsys_glob)) 2894 continue; 2895 if (event_glob && 2896 !strglobmatch(ent->pev.event, event_glob)) 2897 continue; 2898 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group, 2899 ent->pev.event, nd->s); 2900 if (ret > 0) 2901 strlist__add(sdtlist, buf); 2902 } 2903 probe_cache__delete(pcache); 2904 } 2905 strlist__delete(bidlist); 2906 2907 strlist__for_each_entry(nd, sdtlist) { 2908 buf = strchr(nd->s, '@'); 2909 if (buf) 2910 *(buf++) = '\0'; 2911 if (name_only) { 2912 printf("%s ", nd->s); 2913 continue; 2914 } 2915 nd2 = strlist__next(nd); 2916 if (nd2) { 2917 ptr = strchr(nd2->s, '@'); 2918 if (ptr) 2919 *ptr = '\0'; 2920 if (strcmp(nd->s, nd2->s) == 0) 2921 show_detail = true; 2922 } 2923 if (show_detail) { 2924 path = build_id_cache__origname(buf); 2925 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf); 2926 if (ret > 0) { 2927 printf(" %-50s [%s]\n", buf, "SDT event"); 2928 free(buf); 2929 } 2930 free(path); 2931 } else 2932 printf(" %-50s [%s]\n", nd->s, "SDT event"); 2933 if (nd2) { 2934 if (strcmp(nd->s, nd2->s) != 0) 2935 show_detail = false; 2936 if (ptr) 2937 *ptr = '@'; 2938 } 2939 } 2940 strlist__delete(sdtlist); 2941 } 2942 2943 int print_hwcache_events(const char *event_glob, bool name_only) 2944 { 2945 unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0; 2946 char name[64], new_name[128]; 2947 char **evt_list = NULL, **evt_pmus = NULL; 2948 bool evt_num_known = false; 2949 struct perf_pmu *pmu = NULL; 2950 2951 if (perf_pmu__has_hybrid()) { 2952 npmus = perf_pmu__hybrid_pmu_num(); 2953 evt_pmus = zalloc(sizeof(char *) * npmus); 2954 if (!evt_pmus) 2955 goto out_enomem; 2956 } 2957 2958 restart: 2959 if (evt_num_known) { 2960 evt_list = zalloc(sizeof(char *) * evt_num); 2961 if (!evt_list) 2962 goto out_enomem; 2963 } 2964 2965 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 2966 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 2967 /* skip invalid cache type */ 2968 if (!evsel__is_cache_op_valid(type, op)) 2969 continue; 2970 2971 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 2972 unsigned int hybrid_supported = 0, j; 2973 bool supported; 2974 2975 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name)); 2976 if (event_glob != NULL && !strglobmatch(name, event_glob)) 2977 continue; 2978 2979 if (!perf_pmu__has_hybrid()) { 2980 if (!is_event_supported(PERF_TYPE_HW_CACHE, 2981 type | (op << 8) | (i << 16))) { 2982 continue; 2983 } 2984 } else { 2985 perf_pmu__for_each_hybrid_pmu(pmu) { 2986 if (!evt_num_known) { 2987 evt_num++; 2988 continue; 2989 } 2990 2991 supported = is_event_supported( 2992 PERF_TYPE_HW_CACHE, 2993 type | (op << 8) | (i << 16) | 2994 ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT)); 2995 if (supported) { 2996 snprintf(new_name, sizeof(new_name), "%s/%s/", 2997 pmu->name, name); 2998 evt_pmus[hybrid_supported] = strdup(new_name); 2999 hybrid_supported++; 3000 } 3001 } 3002 3003 if (hybrid_supported == 0) 3004 continue; 3005 } 3006 3007 if (!evt_num_known) { 3008 evt_num++; 3009 continue; 3010 } 3011 3012 if ((hybrid_supported == 0) || 3013 (hybrid_supported == npmus)) { 3014 evt_list[evt_i] = strdup(name); 3015 if (npmus > 0) { 3016 for (j = 0; j < npmus; j++) 3017 zfree(&evt_pmus[j]); 3018 } 3019 } else { 3020 for (j = 0; j < hybrid_supported; j++) { 3021 evt_list[evt_i++] = evt_pmus[j]; 3022 evt_pmus[j] = NULL; 3023 } 3024 continue; 3025 } 3026 3027 if (evt_list[evt_i] == NULL) 3028 goto out_enomem; 3029 evt_i++; 3030 } 3031 } 3032 } 3033 3034 if (!evt_num_known) { 3035 evt_num_known = true; 3036 goto restart; 3037 } 3038 3039 for (evt_i = 0; evt_i < evt_num; evt_i++) { 3040 if (!evt_list[evt_i]) 3041 break; 3042 } 3043 3044 evt_num = evt_i; 3045 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 3046 evt_i = 0; 3047 while (evt_i < evt_num) { 3048 if (name_only) { 3049 printf("%s ", evt_list[evt_i++]); 3050 continue; 3051 } 3052 printf(" %-50s [%s]\n", evt_list[evt_i++], 3053 event_type_descriptors[PERF_TYPE_HW_CACHE]); 3054 } 3055 if (evt_num && pager_in_use()) 3056 printf("\n"); 3057 3058 out_free: 3059 evt_num = evt_i; 3060 for (evt_i = 0; evt_i < evt_num; evt_i++) 3061 zfree(&evt_list[evt_i]); 3062 zfree(&evt_list); 3063 3064 for (evt_i = 0; evt_i < npmus; evt_i++) 3065 zfree(&evt_pmus[evt_i]); 3066 zfree(&evt_pmus); 3067 return evt_num; 3068 3069 out_enomem: 3070 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]); 3071 if (evt_list) 3072 goto out_free; 3073 return evt_num; 3074 } 3075 3076 static void print_tool_event(const struct event_symbol *syms, const char *event_glob, 3077 bool name_only) 3078 { 3079 if (syms->symbol == NULL) 3080 return; 3081 3082 if (event_glob && !(strglobmatch(syms->symbol, event_glob) || 3083 (syms->alias && strglobmatch(syms->alias, event_glob)))) 3084 return; 3085 3086 if (name_only) 3087 printf("%s ", syms->symbol); 3088 else { 3089 char name[MAX_NAME_LEN]; 3090 if (syms->alias && strlen(syms->alias)) 3091 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); 3092 else 3093 strlcpy(name, syms->symbol, MAX_NAME_LEN); 3094 printf(" %-50s [%s]\n", name, "Tool event"); 3095 } 3096 } 3097 3098 void print_tool_events(const char *event_glob, bool name_only) 3099 { 3100 // Start at 1 because the first enum entry symbols no tool event 3101 for (int i = 1; i < PERF_TOOL_MAX; ++i) { 3102 print_tool_event(event_symbols_tool + i, event_glob, name_only); 3103 } 3104 if (pager_in_use()) 3105 printf("\n"); 3106 } 3107 3108 void print_symbol_events(const char *event_glob, unsigned type, 3109 struct event_symbol *syms, unsigned max, 3110 bool name_only) 3111 { 3112 unsigned int i, evt_i = 0, evt_num = 0; 3113 char name[MAX_NAME_LEN]; 3114 char **evt_list = NULL; 3115 bool evt_num_known = false; 3116 3117 restart: 3118 if (evt_num_known) { 3119 evt_list = zalloc(sizeof(char *) * evt_num); 3120 if (!evt_list) 3121 goto out_enomem; 3122 syms -= max; 3123 } 3124 3125 for (i = 0; i < max; i++, syms++) { 3126 /* 3127 * New attr.config still not supported here, the latest 3128 * example was PERF_COUNT_SW_CGROUP_SWITCHES 3129 */ 3130 if (syms->symbol == NULL) 3131 continue; 3132 3133 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) || 3134 (syms->alias && strglobmatch(syms->alias, event_glob)))) 3135 continue; 3136 3137 if (!is_event_supported(type, i)) 3138 continue; 3139 3140 if (!evt_num_known) { 3141 evt_num++; 3142 continue; 3143 } 3144 3145 if (!name_only && strlen(syms->alias)) 3146 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); 3147 else 3148 strlcpy(name, syms->symbol, MAX_NAME_LEN); 3149 3150 evt_list[evt_i] = strdup(name); 3151 if (evt_list[evt_i] == NULL) 3152 goto out_enomem; 3153 evt_i++; 3154 } 3155 3156 if (!evt_num_known) { 3157 evt_num_known = true; 3158 goto restart; 3159 } 3160 qsort(evt_list, evt_num, sizeof(char *), cmp_string); 3161 evt_i = 0; 3162 while (evt_i < evt_num) { 3163 if (name_only) { 3164 printf("%s ", evt_list[evt_i++]); 3165 continue; 3166 } 3167 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]); 3168 } 3169 if (evt_num && pager_in_use()) 3170 printf("\n"); 3171 3172 out_free: 3173 evt_num = evt_i; 3174 for (evt_i = 0; evt_i < evt_num; evt_i++) 3175 zfree(&evt_list[evt_i]); 3176 zfree(&evt_list); 3177 return; 3178 3179 out_enomem: 3180 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]); 3181 if (evt_list) 3182 goto out_free; 3183 } 3184 3185 /* 3186 * Print the help text for the event symbols: 3187 */ 3188 void print_events(const char *event_glob, bool name_only, bool quiet_flag, 3189 bool long_desc, bool details_flag, bool deprecated, 3190 const char *pmu_name) 3191 { 3192 print_symbol_events(event_glob, PERF_TYPE_HARDWARE, 3193 event_symbols_hw, PERF_COUNT_HW_MAX, name_only); 3194 3195 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE, 3196 event_symbols_sw, PERF_COUNT_SW_MAX, name_only); 3197 print_tool_events(event_glob, name_only); 3198 3199 print_hwcache_events(event_glob, name_only); 3200 3201 print_pmu_events(event_glob, name_only, quiet_flag, long_desc, 3202 details_flag, deprecated, pmu_name); 3203 3204 if (event_glob != NULL) 3205 return; 3206 3207 if (!name_only) { 3208 printf(" %-50s [%s]\n", 3209 "rNNN", 3210 event_type_descriptors[PERF_TYPE_RAW]); 3211 printf(" %-50s [%s]\n", 3212 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 3213 event_type_descriptors[PERF_TYPE_RAW]); 3214 if (pager_in_use()) 3215 printf(" (see 'man perf-list' on how to encode it)\n\n"); 3216 3217 printf(" %-50s [%s]\n", 3218 "mem:<addr>[/len][:access]", 3219 event_type_descriptors[PERF_TYPE_BREAKPOINT]); 3220 if (pager_in_use()) 3221 printf("\n"); 3222 } 3223 3224 print_tracepoint_events(NULL, NULL, name_only); 3225 3226 print_sdt_events(NULL, NULL, name_only); 3227 3228 metricgroup__print(true, true, NULL, name_only, details_flag, 3229 pmu_name); 3230 3231 print_libpfm_events(name_only, long_desc); 3232 } 3233 3234 int parse_events__is_hardcoded_term(struct parse_events_term *term) 3235 { 3236 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; 3237 } 3238 3239 static int new_term(struct parse_events_term **_term, 3240 struct parse_events_term *temp, 3241 char *str, u64 num) 3242 { 3243 struct parse_events_term *term; 3244 3245 term = malloc(sizeof(*term)); 3246 if (!term) 3247 return -ENOMEM; 3248 3249 *term = *temp; 3250 INIT_LIST_HEAD(&term->list); 3251 term->weak = false; 3252 3253 switch (term->type_val) { 3254 case PARSE_EVENTS__TERM_TYPE_NUM: 3255 term->val.num = num; 3256 break; 3257 case PARSE_EVENTS__TERM_TYPE_STR: 3258 term->val.str = str; 3259 break; 3260 default: 3261 free(term); 3262 return -EINVAL; 3263 } 3264 3265 *_term = term; 3266 return 0; 3267 } 3268 3269 int parse_events_term__num(struct parse_events_term **term, 3270 int type_term, char *config, u64 num, 3271 bool no_value, 3272 void *loc_term_, void *loc_val_) 3273 { 3274 YYLTYPE *loc_term = loc_term_; 3275 YYLTYPE *loc_val = loc_val_; 3276 3277 struct parse_events_term temp = { 3278 .type_val = PARSE_EVENTS__TERM_TYPE_NUM, 3279 .type_term = type_term, 3280 .config = config ? : strdup(config_term_names[type_term]), 3281 .no_value = no_value, 3282 .err_term = loc_term ? loc_term->first_column : 0, 3283 .err_val = loc_val ? loc_val->first_column : 0, 3284 }; 3285 3286 return new_term(term, &temp, NULL, num); 3287 } 3288 3289 int parse_events_term__str(struct parse_events_term **term, 3290 int type_term, char *config, char *str, 3291 void *loc_term_, void *loc_val_) 3292 { 3293 YYLTYPE *loc_term = loc_term_; 3294 YYLTYPE *loc_val = loc_val_; 3295 3296 struct parse_events_term temp = { 3297 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 3298 .type_term = type_term, 3299 .config = config, 3300 .err_term = loc_term ? loc_term->first_column : 0, 3301 .err_val = loc_val ? loc_val->first_column : 0, 3302 }; 3303 3304 return new_term(term, &temp, str, 0); 3305 } 3306 3307 int parse_events_term__sym_hw(struct parse_events_term **term, 3308 char *config, unsigned idx) 3309 { 3310 struct event_symbol *sym; 3311 char *str; 3312 struct parse_events_term temp = { 3313 .type_val = PARSE_EVENTS__TERM_TYPE_STR, 3314 .type_term = PARSE_EVENTS__TERM_TYPE_USER, 3315 .config = config, 3316 }; 3317 3318 if (!temp.config) { 3319 temp.config = strdup("event"); 3320 if (!temp.config) 3321 return -ENOMEM; 3322 } 3323 BUG_ON(idx >= PERF_COUNT_HW_MAX); 3324 sym = &event_symbols_hw[idx]; 3325 3326 str = strdup(sym->symbol); 3327 if (!str) 3328 return -ENOMEM; 3329 return new_term(term, &temp, str, 0); 3330 } 3331 3332 int parse_events_term__clone(struct parse_events_term **new, 3333 struct parse_events_term *term) 3334 { 3335 char *str; 3336 struct parse_events_term temp = { 3337 .type_val = term->type_val, 3338 .type_term = term->type_term, 3339 .config = NULL, 3340 .err_term = term->err_term, 3341 .err_val = term->err_val, 3342 }; 3343 3344 if (term->config) { 3345 temp.config = strdup(term->config); 3346 if (!temp.config) 3347 return -ENOMEM; 3348 } 3349 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) 3350 return new_term(new, &temp, NULL, term->val.num); 3351 3352 str = strdup(term->val.str); 3353 if (!str) 3354 return -ENOMEM; 3355 return new_term(new, &temp, str, 0); 3356 } 3357 3358 void parse_events_term__delete(struct parse_events_term *term) 3359 { 3360 if (term->array.nr_ranges) 3361 zfree(&term->array.ranges); 3362 3363 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) 3364 zfree(&term->val.str); 3365 3366 zfree(&term->config); 3367 free(term); 3368 } 3369 3370 int parse_events_copy_term_list(struct list_head *old, 3371 struct list_head **new) 3372 { 3373 struct parse_events_term *term, *n; 3374 int ret; 3375 3376 if (!old) { 3377 *new = NULL; 3378 return 0; 3379 } 3380 3381 *new = malloc(sizeof(struct list_head)); 3382 if (!*new) 3383 return -ENOMEM; 3384 INIT_LIST_HEAD(*new); 3385 3386 list_for_each_entry (term, old, list) { 3387 ret = parse_events_term__clone(&n, term); 3388 if (ret) 3389 return ret; 3390 list_add_tail(&n->list, *new); 3391 } 3392 return 0; 3393 } 3394 3395 void parse_events_terms__purge(struct list_head *terms) 3396 { 3397 struct parse_events_term *term, *h; 3398 3399 list_for_each_entry_safe(term, h, terms, list) { 3400 list_del_init(&term->list); 3401 parse_events_term__delete(term); 3402 } 3403 } 3404 3405 void parse_events_terms__delete(struct list_head *terms) 3406 { 3407 if (!terms) 3408 return; 3409 parse_events_terms__purge(terms); 3410 free(terms); 3411 } 3412 3413 void parse_events__clear_array(struct parse_events_array *a) 3414 { 3415 zfree(&a->ranges); 3416 } 3417 3418 void parse_events_evlist_error(struct parse_events_state *parse_state, 3419 int idx, const char *str) 3420 { 3421 if (!parse_state->error) 3422 return; 3423 3424 parse_events_error__handle(parse_state->error, idx, strdup(str), NULL); 3425 } 3426 3427 static void config_terms_list(char *buf, size_t buf_sz) 3428 { 3429 int i; 3430 bool first = true; 3431 3432 buf[0] = '\0'; 3433 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) { 3434 const char *name = config_term_names[i]; 3435 3436 if (!config_term_avail(i, NULL)) 3437 continue; 3438 if (!name) 3439 continue; 3440 if (name[0] == '<') 3441 continue; 3442 3443 if (strlen(buf) + strlen(name) + 2 >= buf_sz) 3444 return; 3445 3446 if (!first) 3447 strcat(buf, ","); 3448 else 3449 first = false; 3450 strcat(buf, name); 3451 } 3452 } 3453 3454 /* 3455 * Return string contains valid config terms of an event. 3456 * @additional_terms: For terms such as PMU sysfs terms. 3457 */ 3458 char *parse_events_formats_error_string(char *additional_terms) 3459 { 3460 char *str; 3461 /* "no-overwrite" is the longest name */ 3462 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR * 3463 (sizeof("no-overwrite") - 1)]; 3464 3465 config_terms_list(static_terms, sizeof(static_terms)); 3466 /* valid terms */ 3467 if (additional_terms) { 3468 if (asprintf(&str, "valid terms: %s,%s", 3469 additional_terms, static_terms) < 0) 3470 goto fail; 3471 } else { 3472 if (asprintf(&str, "valid terms: %s", static_terms) < 0) 3473 goto fail; 3474 } 3475 return str; 3476 3477 fail: 3478 return NULL; 3479 } 3480 3481 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx, 3482 struct perf_event_attr *attr, 3483 const char *name, 3484 const char *metric_id, 3485 struct perf_pmu *pmu, 3486 struct list_head *config_terms) 3487 { 3488 return __add_event(list, idx, attr, /*init_attr=*/true, name, metric_id, 3489 pmu, config_terms, /*auto_merge_stats=*/false, 3490 /*cpu_list=*/NULL); 3491 } 3492