1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 4 * 5 * Parts came from builtin-{top,stat,record}.c, see those files for further 6 * copyright notes. 7 */ 8 9 #include <byteswap.h> 10 #include <errno.h> 11 #include <inttypes.h> 12 #include <linux/bitops.h> 13 #include <api/fs/fs.h> 14 #include <api/fs/tracing_path.h> 15 #include <linux/hw_breakpoint.h> 16 #include <linux/perf_event.h> 17 #include <linux/compiler.h> 18 #include <linux/err.h> 19 #include <linux/zalloc.h> 20 #include <sys/ioctl.h> 21 #include <sys/resource.h> 22 #include <sys/types.h> 23 #include <dirent.h> 24 #include <stdlib.h> 25 #include <perf/evsel.h> 26 #include "asm/bug.h" 27 #include "bpf_counter.h" 28 #include "callchain.h" 29 #include "cgroup.h" 30 #include "counts.h" 31 #include "event.h" 32 #include "evsel.h" 33 #include "util/env.h" 34 #include "util/evsel_config.h" 35 #include "util/evsel_fprintf.h" 36 #include "evlist.h" 37 #include <perf/cpumap.h> 38 #include "thread_map.h" 39 #include "target.h" 40 #include "perf_regs.h" 41 #include "record.h" 42 #include "debug.h" 43 #include "trace-event.h" 44 #include "stat.h" 45 #include "string2.h" 46 #include "memswap.h" 47 #include "util.h" 48 #include "util/hashmap.h" 49 #include "off_cpu.h" 50 #include "pmu.h" 51 #include "pmus.h" 52 #include "rlimit.h" 53 #include "../perf-sys.h" 54 #include "util/parse-branch-options.h" 55 #include "util/bpf-filter.h" 56 #include <internal/xyarray.h> 57 #include <internal/lib.h> 58 #include <internal/threadmap.h> 59 60 #include <linux/ctype.h> 61 62 #ifdef HAVE_LIBTRACEEVENT 63 #include <traceevent/event-parse.h> 64 #endif 65 66 struct perf_missing_features perf_missing_features; 67 68 static clockid_t clockid; 69 70 static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = { 71 NULL, 72 "duration_time", 73 "user_time", 74 "system_time", 75 }; 76 77 const char *perf_tool_event__to_str(enum perf_tool_event ev) 78 { 79 if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX) 80 return perf_tool_event__tool_names[ev]; 81 82 return NULL; 83 } 84 85 enum perf_tool_event perf_tool_event__from_str(const char *str) 86 { 87 int i; 88 89 perf_tool_event__for_each_event(i) { 90 if (!strcmp(str, perf_tool_event__tool_names[i])) 91 return i; 92 } 93 return PERF_TOOL_NONE; 94 } 95 96 97 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused) 98 { 99 return 0; 100 } 101 102 void __weak test_attr__ready(void) { } 103 104 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused) 105 { 106 } 107 108 static struct { 109 size_t size; 110 int (*init)(struct evsel *evsel); 111 void (*fini)(struct evsel *evsel); 112 } perf_evsel__object = { 113 .size = sizeof(struct evsel), 114 .init = evsel__no_extra_init, 115 .fini = evsel__no_extra_fini, 116 }; 117 118 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel), 119 void (*fini)(struct evsel *evsel)) 120 { 121 122 if (object_size == 0) 123 goto set_methods; 124 125 if (perf_evsel__object.size > object_size) 126 return -EINVAL; 127 128 perf_evsel__object.size = object_size; 129 130 set_methods: 131 if (init != NULL) 132 perf_evsel__object.init = init; 133 134 if (fini != NULL) 135 perf_evsel__object.fini = fini; 136 137 return 0; 138 } 139 140 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) 141 142 int __evsel__sample_size(u64 sample_type) 143 { 144 u64 mask = sample_type & PERF_SAMPLE_MASK; 145 int size = 0; 146 int i; 147 148 for (i = 0; i < 64; i++) { 149 if (mask & (1ULL << i)) 150 size++; 151 } 152 153 size *= sizeof(u64); 154 155 return size; 156 } 157 158 /** 159 * __perf_evsel__calc_id_pos - calculate id_pos. 160 * @sample_type: sample type 161 * 162 * This function returns the position of the event id (PERF_SAMPLE_ID or 163 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct 164 * perf_record_sample. 165 */ 166 static int __perf_evsel__calc_id_pos(u64 sample_type) 167 { 168 int idx = 0; 169 170 if (sample_type & PERF_SAMPLE_IDENTIFIER) 171 return 0; 172 173 if (!(sample_type & PERF_SAMPLE_ID)) 174 return -1; 175 176 if (sample_type & PERF_SAMPLE_IP) 177 idx += 1; 178 179 if (sample_type & PERF_SAMPLE_TID) 180 idx += 1; 181 182 if (sample_type & PERF_SAMPLE_TIME) 183 idx += 1; 184 185 if (sample_type & PERF_SAMPLE_ADDR) 186 idx += 1; 187 188 return idx; 189 } 190 191 /** 192 * __perf_evsel__calc_is_pos - calculate is_pos. 193 * @sample_type: sample type 194 * 195 * This function returns the position (counting backwards) of the event id 196 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if 197 * sample_id_all is used there is an id sample appended to non-sample events. 198 */ 199 static int __perf_evsel__calc_is_pos(u64 sample_type) 200 { 201 int idx = 1; 202 203 if (sample_type & PERF_SAMPLE_IDENTIFIER) 204 return 1; 205 206 if (!(sample_type & PERF_SAMPLE_ID)) 207 return -1; 208 209 if (sample_type & PERF_SAMPLE_CPU) 210 idx += 1; 211 212 if (sample_type & PERF_SAMPLE_STREAM_ID) 213 idx += 1; 214 215 return idx; 216 } 217 218 void evsel__calc_id_pos(struct evsel *evsel) 219 { 220 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type); 221 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type); 222 } 223 224 void __evsel__set_sample_bit(struct evsel *evsel, 225 enum perf_event_sample_format bit) 226 { 227 if (!(evsel->core.attr.sample_type & bit)) { 228 evsel->core.attr.sample_type |= bit; 229 evsel->sample_size += sizeof(u64); 230 evsel__calc_id_pos(evsel); 231 } 232 } 233 234 void __evsel__reset_sample_bit(struct evsel *evsel, 235 enum perf_event_sample_format bit) 236 { 237 if (evsel->core.attr.sample_type & bit) { 238 evsel->core.attr.sample_type &= ~bit; 239 evsel->sample_size -= sizeof(u64); 240 evsel__calc_id_pos(evsel); 241 } 242 } 243 244 void evsel__set_sample_id(struct evsel *evsel, 245 bool can_sample_identifier) 246 { 247 if (can_sample_identifier) { 248 evsel__reset_sample_bit(evsel, ID); 249 evsel__set_sample_bit(evsel, IDENTIFIER); 250 } else { 251 evsel__set_sample_bit(evsel, ID); 252 } 253 evsel->core.attr.read_format |= PERF_FORMAT_ID; 254 } 255 256 /** 257 * evsel__is_function_event - Return whether given evsel is a function 258 * trace event 259 * 260 * @evsel - evsel selector to be tested 261 * 262 * Return %true if event is function trace event 263 */ 264 bool evsel__is_function_event(struct evsel *evsel) 265 { 266 #define FUNCTION_EVENT "ftrace:function" 267 268 return evsel->name && 269 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT)); 270 271 #undef FUNCTION_EVENT 272 } 273 274 void evsel__init(struct evsel *evsel, 275 struct perf_event_attr *attr, int idx) 276 { 277 perf_evsel__init(&evsel->core, attr, idx); 278 evsel->tracking = !idx; 279 evsel->unit = strdup(""); 280 evsel->scale = 1.0; 281 evsel->max_events = ULONG_MAX; 282 evsel->evlist = NULL; 283 evsel->bpf_obj = NULL; 284 evsel->bpf_fd = -1; 285 INIT_LIST_HEAD(&evsel->config_terms); 286 INIT_LIST_HEAD(&evsel->bpf_counter_list); 287 INIT_LIST_HEAD(&evsel->bpf_filters); 288 perf_evsel__object.init(evsel); 289 evsel->sample_size = __evsel__sample_size(attr->sample_type); 290 evsel__calc_id_pos(evsel); 291 evsel->cmdline_group_boundary = false; 292 evsel->metric_events = NULL; 293 evsel->per_pkg_mask = NULL; 294 evsel->collect_stat = false; 295 evsel->pmu_name = NULL; 296 evsel->group_pmu_name = NULL; 297 evsel->skippable = false; 298 } 299 300 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx) 301 { 302 struct evsel *evsel = zalloc(perf_evsel__object.size); 303 304 if (!evsel) 305 return NULL; 306 evsel__init(evsel, attr, idx); 307 308 if (evsel__is_bpf_output(evsel) && !attr->sample_type) { 309 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | 310 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), 311 evsel->core.attr.sample_period = 1; 312 } 313 314 if (evsel__is_clock(evsel)) { 315 free((char *)evsel->unit); 316 evsel->unit = strdup("msec"); 317 evsel->scale = 1e-6; 318 } 319 320 return evsel; 321 } 322 323 int copy_config_terms(struct list_head *dst, struct list_head *src) 324 { 325 struct evsel_config_term *pos, *tmp; 326 327 list_for_each_entry(pos, src, list) { 328 tmp = malloc(sizeof(*tmp)); 329 if (tmp == NULL) 330 return -ENOMEM; 331 332 *tmp = *pos; 333 if (tmp->free_str) { 334 tmp->val.str = strdup(pos->val.str); 335 if (tmp->val.str == NULL) { 336 free(tmp); 337 return -ENOMEM; 338 } 339 } 340 list_add_tail(&tmp->list, dst); 341 } 342 return 0; 343 } 344 345 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src) 346 { 347 return copy_config_terms(&dst->config_terms, &src->config_terms); 348 } 349 350 /** 351 * evsel__clone - create a new evsel copied from @orig 352 * @orig: original evsel 353 * 354 * The assumption is that @orig is not configured nor opened yet. 355 * So we only care about the attributes that can be set while it's parsed. 356 */ 357 struct evsel *evsel__clone(struct evsel *orig) 358 { 359 struct evsel *evsel; 360 361 BUG_ON(orig->core.fd); 362 BUG_ON(orig->counts); 363 BUG_ON(orig->priv); 364 BUG_ON(orig->per_pkg_mask); 365 366 /* cannot handle BPF objects for now */ 367 if (orig->bpf_obj) 368 return NULL; 369 370 evsel = evsel__new(&orig->core.attr); 371 if (evsel == NULL) 372 return NULL; 373 374 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus); 375 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus); 376 evsel->core.threads = perf_thread_map__get(orig->core.threads); 377 evsel->core.nr_members = orig->core.nr_members; 378 evsel->core.system_wide = orig->core.system_wide; 379 evsel->core.requires_cpu = orig->core.requires_cpu; 380 evsel->core.is_pmu_core = orig->core.is_pmu_core; 381 382 if (orig->name) { 383 evsel->name = strdup(orig->name); 384 if (evsel->name == NULL) 385 goto out_err; 386 } 387 if (orig->group_name) { 388 evsel->group_name = strdup(orig->group_name); 389 if (evsel->group_name == NULL) 390 goto out_err; 391 } 392 if (orig->pmu_name) { 393 evsel->pmu_name = strdup(orig->pmu_name); 394 if (evsel->pmu_name == NULL) 395 goto out_err; 396 } 397 if (orig->group_pmu_name) { 398 evsel->group_pmu_name = strdup(orig->group_pmu_name); 399 if (evsel->group_pmu_name == NULL) 400 goto out_err; 401 } 402 if (orig->filter) { 403 evsel->filter = strdup(orig->filter); 404 if (evsel->filter == NULL) 405 goto out_err; 406 } 407 if (orig->metric_id) { 408 evsel->metric_id = strdup(orig->metric_id); 409 if (evsel->metric_id == NULL) 410 goto out_err; 411 } 412 evsel->cgrp = cgroup__get(orig->cgrp); 413 #ifdef HAVE_LIBTRACEEVENT 414 evsel->tp_format = orig->tp_format; 415 #endif 416 evsel->handler = orig->handler; 417 evsel->core.leader = orig->core.leader; 418 419 evsel->max_events = orig->max_events; 420 evsel->tool_event = orig->tool_event; 421 free((char *)evsel->unit); 422 evsel->unit = strdup(orig->unit); 423 if (evsel->unit == NULL) 424 goto out_err; 425 426 evsel->scale = orig->scale; 427 evsel->snapshot = orig->snapshot; 428 evsel->per_pkg = orig->per_pkg; 429 evsel->percore = orig->percore; 430 evsel->precise_max = orig->precise_max; 431 evsel->is_libpfm_event = orig->is_libpfm_event; 432 433 evsel->exclude_GH = orig->exclude_GH; 434 evsel->sample_read = orig->sample_read; 435 evsel->auto_merge_stats = orig->auto_merge_stats; 436 evsel->collect_stat = orig->collect_stat; 437 evsel->weak_group = orig->weak_group; 438 evsel->use_config_name = orig->use_config_name; 439 evsel->pmu = orig->pmu; 440 441 if (evsel__copy_config_terms(evsel, orig) < 0) 442 goto out_err; 443 444 return evsel; 445 446 out_err: 447 evsel__delete(evsel); 448 return NULL; 449 } 450 451 /* 452 * Returns pointer with encoded error via <linux/err.h> interface. 453 */ 454 #ifdef HAVE_LIBTRACEEVENT 455 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx) 456 { 457 struct evsel *evsel = zalloc(perf_evsel__object.size); 458 int err = -ENOMEM; 459 460 if (evsel == NULL) { 461 goto out_err; 462 } else { 463 struct perf_event_attr attr = { 464 .type = PERF_TYPE_TRACEPOINT, 465 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | 466 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), 467 }; 468 469 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) 470 goto out_free; 471 472 evsel->tp_format = trace_event__tp_format(sys, name); 473 if (IS_ERR(evsel->tp_format)) { 474 err = PTR_ERR(evsel->tp_format); 475 goto out_free; 476 } 477 478 event_attr_init(&attr); 479 attr.config = evsel->tp_format->id; 480 attr.sample_period = 1; 481 evsel__init(evsel, &attr, idx); 482 } 483 484 return evsel; 485 486 out_free: 487 zfree(&evsel->name); 488 free(evsel); 489 out_err: 490 return ERR_PTR(err); 491 } 492 #endif 493 494 const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = { 495 "cycles", 496 "instructions", 497 "cache-references", 498 "cache-misses", 499 "branches", 500 "branch-misses", 501 "bus-cycles", 502 "stalled-cycles-frontend", 503 "stalled-cycles-backend", 504 "ref-cycles", 505 }; 506 507 char *evsel__bpf_counter_events; 508 509 bool evsel__match_bpf_counter_events(const char *name) 510 { 511 int name_len; 512 bool match; 513 char *ptr; 514 515 if (!evsel__bpf_counter_events) 516 return false; 517 518 ptr = strstr(evsel__bpf_counter_events, name); 519 name_len = strlen(name); 520 521 /* check name matches a full token in evsel__bpf_counter_events */ 522 match = (ptr != NULL) && 523 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) && 524 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0')); 525 526 return match; 527 } 528 529 static const char *__evsel__hw_name(u64 config) 530 { 531 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config]) 532 return evsel__hw_names[config]; 533 534 return "unknown-hardware"; 535 } 536 537 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size) 538 { 539 int colon = 0, r = 0; 540 struct perf_event_attr *attr = &evsel->core.attr; 541 bool exclude_guest_default = false; 542 543 #define MOD_PRINT(context, mod) do { \ 544 if (!attr->exclude_##context) { \ 545 if (!colon) colon = ++r; \ 546 r += scnprintf(bf + r, size - r, "%c", mod); \ 547 } } while(0) 548 549 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { 550 MOD_PRINT(kernel, 'k'); 551 MOD_PRINT(user, 'u'); 552 MOD_PRINT(hv, 'h'); 553 exclude_guest_default = true; 554 } 555 556 if (attr->precise_ip) { 557 if (!colon) 558 colon = ++r; 559 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); 560 exclude_guest_default = true; 561 } 562 563 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { 564 MOD_PRINT(host, 'H'); 565 MOD_PRINT(guest, 'G'); 566 } 567 #undef MOD_PRINT 568 if (colon) 569 bf[colon - 1] = ':'; 570 return r; 571 } 572 573 int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size) 574 { 575 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config)); 576 } 577 578 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size) 579 { 580 int r = arch_evsel__hw_name(evsel, bf, size); 581 return r + evsel__add_modifiers(evsel, bf + r, size - r); 582 } 583 584 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = { 585 "cpu-clock", 586 "task-clock", 587 "page-faults", 588 "context-switches", 589 "cpu-migrations", 590 "minor-faults", 591 "major-faults", 592 "alignment-faults", 593 "emulation-faults", 594 "dummy", 595 }; 596 597 static const char *__evsel__sw_name(u64 config) 598 { 599 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config]) 600 return evsel__sw_names[config]; 601 return "unknown-software"; 602 } 603 604 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size) 605 { 606 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config)); 607 return r + evsel__add_modifiers(evsel, bf + r, size - r); 608 } 609 610 static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size) 611 { 612 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev)); 613 } 614 615 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) 616 { 617 int r; 618 619 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); 620 621 if (type & HW_BREAKPOINT_R) 622 r += scnprintf(bf + r, size - r, "r"); 623 624 if (type & HW_BREAKPOINT_W) 625 r += scnprintf(bf + r, size - r, "w"); 626 627 if (type & HW_BREAKPOINT_X) 628 r += scnprintf(bf + r, size - r, "x"); 629 630 return r; 631 } 632 633 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size) 634 { 635 struct perf_event_attr *attr = &evsel->core.attr; 636 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); 637 return r + evsel__add_modifiers(evsel, bf + r, size - r); 638 } 639 640 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = { 641 { "L1-dcache", "l1-d", "l1d", "L1-data", }, 642 { "L1-icache", "l1-i", "l1i", "L1-instruction", }, 643 { "LLC", "L2", }, 644 { "dTLB", "d-tlb", "Data-TLB", }, 645 { "iTLB", "i-tlb", "Instruction-TLB", }, 646 { "branch", "branches", "bpu", "btb", "bpc", }, 647 { "node", }, 648 }; 649 650 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = { 651 { "load", "loads", "read", }, 652 { "store", "stores", "write", }, 653 { "prefetch", "prefetches", "speculative-read", "speculative-load", }, 654 }; 655 656 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = { 657 { "refs", "Reference", "ops", "access", }, 658 { "misses", "miss", }, 659 }; 660 661 #define C(x) PERF_COUNT_HW_CACHE_##x 662 #define CACHE_READ (1 << C(OP_READ)) 663 #define CACHE_WRITE (1 << C(OP_WRITE)) 664 #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) 665 #define COP(x) (1 << x) 666 667 /* 668 * cache operation stat 669 * L1I : Read and prefetch only 670 * ITLB and BPU : Read-only 671 */ 672 static const unsigned long evsel__hw_cache_stat[C(MAX)] = { 673 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 674 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), 675 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 676 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 677 [C(ITLB)] = (CACHE_READ), 678 [C(BPU)] = (CACHE_READ), 679 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 680 }; 681 682 bool evsel__is_cache_op_valid(u8 type, u8 op) 683 { 684 if (evsel__hw_cache_stat[type] & COP(op)) 685 return true; /* valid */ 686 else 687 return false; /* invalid */ 688 } 689 690 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size) 691 { 692 if (result) { 693 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0], 694 evsel__hw_cache_op[op][0], 695 evsel__hw_cache_result[result][0]); 696 } 697 698 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0], 699 evsel__hw_cache_op[op][1]); 700 } 701 702 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size) 703 { 704 u8 op, result, type = (config >> 0) & 0xff; 705 const char *err = "unknown-ext-hardware-cache-type"; 706 707 if (type >= PERF_COUNT_HW_CACHE_MAX) 708 goto out_err; 709 710 op = (config >> 8) & 0xff; 711 err = "unknown-ext-hardware-cache-op"; 712 if (op >= PERF_COUNT_HW_CACHE_OP_MAX) 713 goto out_err; 714 715 result = (config >> 16) & 0xff; 716 err = "unknown-ext-hardware-cache-result"; 717 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX) 718 goto out_err; 719 720 err = "invalid-cache"; 721 if (!evsel__is_cache_op_valid(type, op)) 722 goto out_err; 723 724 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size); 725 out_err: 726 return scnprintf(bf, size, "%s", err); 727 } 728 729 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size) 730 { 731 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size); 732 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret); 733 } 734 735 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size) 736 { 737 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config); 738 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret); 739 } 740 741 const char *evsel__name(struct evsel *evsel) 742 { 743 char bf[128]; 744 745 if (!evsel) 746 goto out_unknown; 747 748 if (evsel->name) 749 return evsel->name; 750 751 switch (evsel->core.attr.type) { 752 case PERF_TYPE_RAW: 753 evsel__raw_name(evsel, bf, sizeof(bf)); 754 break; 755 756 case PERF_TYPE_HARDWARE: 757 evsel__hw_name(evsel, bf, sizeof(bf)); 758 break; 759 760 case PERF_TYPE_HW_CACHE: 761 evsel__hw_cache_name(evsel, bf, sizeof(bf)); 762 break; 763 764 case PERF_TYPE_SOFTWARE: 765 if (evsel__is_tool(evsel)) 766 evsel__tool_name(evsel->tool_event, bf, sizeof(bf)); 767 else 768 evsel__sw_name(evsel, bf, sizeof(bf)); 769 break; 770 771 case PERF_TYPE_TRACEPOINT: 772 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); 773 break; 774 775 case PERF_TYPE_BREAKPOINT: 776 evsel__bp_name(evsel, bf, sizeof(bf)); 777 break; 778 779 default: 780 scnprintf(bf, sizeof(bf), "unknown attr type: %d", 781 evsel->core.attr.type); 782 break; 783 } 784 785 evsel->name = strdup(bf); 786 787 if (evsel->name) 788 return evsel->name; 789 out_unknown: 790 return "unknown"; 791 } 792 793 bool evsel__name_is(struct evsel *evsel, const char *name) 794 { 795 return !strcmp(evsel__name(evsel), name); 796 } 797 798 const char *evsel__metric_id(const struct evsel *evsel) 799 { 800 if (evsel->metric_id) 801 return evsel->metric_id; 802 803 if (evsel__is_tool(evsel)) 804 return perf_tool_event__to_str(evsel->tool_event); 805 806 return "unknown"; 807 } 808 809 const char *evsel__group_name(struct evsel *evsel) 810 { 811 return evsel->group_name ?: "anon group"; 812 } 813 814 /* 815 * Returns the group details for the specified leader, 816 * with following rules. 817 * 818 * For record -e '{cycles,instructions}' 819 * 'anon group { cycles:u, instructions:u }' 820 * 821 * For record -e 'cycles,instructions' and report --group 822 * 'cycles:u, instructions:u' 823 */ 824 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size) 825 { 826 int ret = 0; 827 struct evsel *pos; 828 const char *group_name = evsel__group_name(evsel); 829 830 if (!evsel->forced_leader) 831 ret = scnprintf(buf, size, "%s { ", group_name); 832 833 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel)); 834 835 for_each_group_member(pos, evsel) 836 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos)); 837 838 if (!evsel->forced_leader) 839 ret += scnprintf(buf + ret, size - ret, " }"); 840 841 return ret; 842 } 843 844 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, 845 struct callchain_param *param) 846 { 847 bool function = evsel__is_function_event(evsel); 848 struct perf_event_attr *attr = &evsel->core.attr; 849 const char *arch = perf_env__arch(evsel__env(evsel)); 850 851 evsel__set_sample_bit(evsel, CALLCHAIN); 852 853 attr->sample_max_stack = param->max_stack; 854 855 if (opts->kernel_callchains) 856 attr->exclude_callchain_user = 1; 857 if (opts->user_callchains) 858 attr->exclude_callchain_kernel = 1; 859 if (param->record_mode == CALLCHAIN_LBR) { 860 if (!opts->branch_stack) { 861 if (attr->exclude_user) { 862 pr_warning("LBR callstack option is only available " 863 "to get user callchain information. " 864 "Falling back to framepointers.\n"); 865 } else { 866 evsel__set_sample_bit(evsel, BRANCH_STACK); 867 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER | 868 PERF_SAMPLE_BRANCH_CALL_STACK | 869 PERF_SAMPLE_BRANCH_NO_CYCLES | 870 PERF_SAMPLE_BRANCH_NO_FLAGS | 871 PERF_SAMPLE_BRANCH_HW_INDEX; 872 } 873 } else 874 pr_warning("Cannot use LBR callstack with branch stack. " 875 "Falling back to framepointers.\n"); 876 } 877 878 if (param->record_mode == CALLCHAIN_DWARF) { 879 if (!function) { 880 evsel__set_sample_bit(evsel, REGS_USER); 881 evsel__set_sample_bit(evsel, STACK_USER); 882 if (opts->sample_user_regs && 883 DWARF_MINIMAL_REGS(arch) != arch__user_reg_mask()) { 884 attr->sample_regs_user |= DWARF_MINIMAL_REGS(arch); 885 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, " 886 "specifying a subset with --user-regs may render DWARF unwinding unreliable, " 887 "so the minimal registers set (IP, SP) is explicitly forced.\n"); 888 } else { 889 attr->sample_regs_user |= arch__user_reg_mask(); 890 } 891 attr->sample_stack_user = param->dump_size; 892 attr->exclude_callchain_user = 1; 893 } else { 894 pr_info("Cannot use DWARF unwind for function trace event," 895 " falling back to framepointers.\n"); 896 } 897 } 898 899 if (function) { 900 pr_info("Disabling user space callchains for function trace event.\n"); 901 attr->exclude_callchain_user = 1; 902 } 903 } 904 905 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, 906 struct callchain_param *param) 907 { 908 if (param->enabled) 909 return __evsel__config_callchain(evsel, opts, param); 910 } 911 912 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param) 913 { 914 struct perf_event_attr *attr = &evsel->core.attr; 915 916 evsel__reset_sample_bit(evsel, CALLCHAIN); 917 if (param->record_mode == CALLCHAIN_LBR) { 918 evsel__reset_sample_bit(evsel, BRANCH_STACK); 919 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER | 920 PERF_SAMPLE_BRANCH_CALL_STACK | 921 PERF_SAMPLE_BRANCH_HW_INDEX); 922 } 923 if (param->record_mode == CALLCHAIN_DWARF) { 924 evsel__reset_sample_bit(evsel, REGS_USER); 925 evsel__reset_sample_bit(evsel, STACK_USER); 926 } 927 } 928 929 static void evsel__apply_config_terms(struct evsel *evsel, 930 struct record_opts *opts, bool track) 931 { 932 struct evsel_config_term *term; 933 struct list_head *config_terms = &evsel->config_terms; 934 struct perf_event_attr *attr = &evsel->core.attr; 935 /* callgraph default */ 936 struct callchain_param param = { 937 .record_mode = callchain_param.record_mode, 938 }; 939 u32 dump_size = 0; 940 int max_stack = 0; 941 const char *callgraph_buf = NULL; 942 943 list_for_each_entry(term, config_terms, list) { 944 switch (term->type) { 945 case EVSEL__CONFIG_TERM_PERIOD: 946 if (!(term->weak && opts->user_interval != ULLONG_MAX)) { 947 attr->sample_period = term->val.period; 948 attr->freq = 0; 949 evsel__reset_sample_bit(evsel, PERIOD); 950 } 951 break; 952 case EVSEL__CONFIG_TERM_FREQ: 953 if (!(term->weak && opts->user_freq != UINT_MAX)) { 954 attr->sample_freq = term->val.freq; 955 attr->freq = 1; 956 evsel__set_sample_bit(evsel, PERIOD); 957 } 958 break; 959 case EVSEL__CONFIG_TERM_TIME: 960 if (term->val.time) 961 evsel__set_sample_bit(evsel, TIME); 962 else 963 evsel__reset_sample_bit(evsel, TIME); 964 break; 965 case EVSEL__CONFIG_TERM_CALLGRAPH: 966 callgraph_buf = term->val.str; 967 break; 968 case EVSEL__CONFIG_TERM_BRANCH: 969 if (term->val.str && strcmp(term->val.str, "no")) { 970 evsel__set_sample_bit(evsel, BRANCH_STACK); 971 parse_branch_str(term->val.str, 972 &attr->branch_sample_type); 973 } else 974 evsel__reset_sample_bit(evsel, BRANCH_STACK); 975 break; 976 case EVSEL__CONFIG_TERM_STACK_USER: 977 dump_size = term->val.stack_user; 978 break; 979 case EVSEL__CONFIG_TERM_MAX_STACK: 980 max_stack = term->val.max_stack; 981 break; 982 case EVSEL__CONFIG_TERM_MAX_EVENTS: 983 evsel->max_events = term->val.max_events; 984 break; 985 case EVSEL__CONFIG_TERM_INHERIT: 986 /* 987 * attr->inherit should has already been set by 988 * evsel__config. If user explicitly set 989 * inherit using config terms, override global 990 * opt->no_inherit setting. 991 */ 992 attr->inherit = term->val.inherit ? 1 : 0; 993 break; 994 case EVSEL__CONFIG_TERM_OVERWRITE: 995 attr->write_backward = term->val.overwrite ? 1 : 0; 996 break; 997 case EVSEL__CONFIG_TERM_DRV_CFG: 998 break; 999 case EVSEL__CONFIG_TERM_PERCORE: 1000 break; 1001 case EVSEL__CONFIG_TERM_AUX_OUTPUT: 1002 attr->aux_output = term->val.aux_output ? 1 : 0; 1003 break; 1004 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE: 1005 /* Already applied by auxtrace */ 1006 break; 1007 case EVSEL__CONFIG_TERM_CFG_CHG: 1008 break; 1009 default: 1010 break; 1011 } 1012 } 1013 1014 /* User explicitly set per-event callgraph, clear the old setting and reset. */ 1015 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) { 1016 bool sample_address = false; 1017 1018 if (max_stack) { 1019 param.max_stack = max_stack; 1020 if (callgraph_buf == NULL) 1021 callgraph_buf = "fp"; 1022 } 1023 1024 /* parse callgraph parameters */ 1025 if (callgraph_buf != NULL) { 1026 if (!strcmp(callgraph_buf, "no")) { 1027 param.enabled = false; 1028 param.record_mode = CALLCHAIN_NONE; 1029 } else { 1030 param.enabled = true; 1031 if (parse_callchain_record(callgraph_buf, ¶m)) { 1032 pr_err("per-event callgraph setting for %s failed. " 1033 "Apply callgraph global setting for it\n", 1034 evsel->name); 1035 return; 1036 } 1037 if (param.record_mode == CALLCHAIN_DWARF) 1038 sample_address = true; 1039 } 1040 } 1041 if (dump_size > 0) { 1042 dump_size = round_up(dump_size, sizeof(u64)); 1043 param.dump_size = dump_size; 1044 } 1045 1046 /* If global callgraph set, clear it */ 1047 if (callchain_param.enabled) 1048 evsel__reset_callgraph(evsel, &callchain_param); 1049 1050 /* set perf-event callgraph */ 1051 if (param.enabled) { 1052 if (sample_address) { 1053 evsel__set_sample_bit(evsel, ADDR); 1054 evsel__set_sample_bit(evsel, DATA_SRC); 1055 evsel->core.attr.mmap_data = track; 1056 } 1057 evsel__config_callchain(evsel, opts, ¶m); 1058 } 1059 } 1060 } 1061 1062 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type) 1063 { 1064 struct evsel_config_term *term, *found_term = NULL; 1065 1066 list_for_each_entry(term, &evsel->config_terms, list) { 1067 if (term->type == type) 1068 found_term = term; 1069 } 1070 1071 return found_term; 1072 } 1073 1074 void __weak arch_evsel__set_sample_weight(struct evsel *evsel) 1075 { 1076 evsel__set_sample_bit(evsel, WEIGHT); 1077 } 1078 1079 void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused, 1080 struct perf_event_attr *attr __maybe_unused) 1081 { 1082 } 1083 1084 static void evsel__set_default_freq_period(struct record_opts *opts, 1085 struct perf_event_attr *attr) 1086 { 1087 if (opts->freq) { 1088 attr->freq = 1; 1089 attr->sample_freq = opts->freq; 1090 } else { 1091 attr->sample_period = opts->default_interval; 1092 } 1093 } 1094 1095 static bool evsel__is_offcpu_event(struct evsel *evsel) 1096 { 1097 return evsel__is_bpf_output(evsel) && evsel__name_is(evsel, OFFCPU_EVENT); 1098 } 1099 1100 /* 1101 * The enable_on_exec/disabled value strategy: 1102 * 1103 * 1) For any type of traced program: 1104 * - all independent events and group leaders are disabled 1105 * - all group members are enabled 1106 * 1107 * Group members are ruled by group leaders. They need to 1108 * be enabled, because the group scheduling relies on that. 1109 * 1110 * 2) For traced programs executed by perf: 1111 * - all independent events and group leaders have 1112 * enable_on_exec set 1113 * - we don't specifically enable or disable any event during 1114 * the record command 1115 * 1116 * Independent events and group leaders are initially disabled 1117 * and get enabled by exec. Group members are ruled by group 1118 * leaders as stated in 1). 1119 * 1120 * 3) For traced programs attached by perf (pid/tid): 1121 * - we specifically enable or disable all events during 1122 * the record command 1123 * 1124 * When attaching events to already running traced we 1125 * enable/disable events specifically, as there's no 1126 * initial traced exec call. 1127 */ 1128 void evsel__config(struct evsel *evsel, struct record_opts *opts, 1129 struct callchain_param *callchain) 1130 { 1131 struct evsel *leader = evsel__leader(evsel); 1132 struct perf_event_attr *attr = &evsel->core.attr; 1133 int track = evsel->tracking; 1134 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; 1135 1136 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; 1137 attr->inherit = !opts->no_inherit; 1138 attr->write_backward = opts->overwrite ? 1 : 0; 1139 attr->read_format = PERF_FORMAT_LOST; 1140 1141 evsel__set_sample_bit(evsel, IP); 1142 evsel__set_sample_bit(evsel, TID); 1143 1144 if (evsel->sample_read) { 1145 evsel__set_sample_bit(evsel, READ); 1146 1147 /* 1148 * We need ID even in case of single event, because 1149 * PERF_SAMPLE_READ process ID specific data. 1150 */ 1151 evsel__set_sample_id(evsel, false); 1152 1153 /* 1154 * Apply group format only if we belong to group 1155 * with more than one members. 1156 */ 1157 if (leader->core.nr_members > 1) { 1158 attr->read_format |= PERF_FORMAT_GROUP; 1159 attr->inherit = 0; 1160 } 1161 } 1162 1163 /* 1164 * We default some events to have a default interval. But keep 1165 * it a weak assumption overridable by the user. 1166 */ 1167 if ((evsel->is_libpfm_event && !attr->sample_period) || 1168 (!evsel->is_libpfm_event && (!attr->sample_period || 1169 opts->user_freq != UINT_MAX || 1170 opts->user_interval != ULLONG_MAX))) 1171 evsel__set_default_freq_period(opts, attr); 1172 1173 /* 1174 * If attr->freq was set (here or earlier), ask for period 1175 * to be sampled. 1176 */ 1177 if (attr->freq) 1178 evsel__set_sample_bit(evsel, PERIOD); 1179 1180 if (opts->no_samples) 1181 attr->sample_freq = 0; 1182 1183 if (opts->inherit_stat) { 1184 evsel->core.attr.read_format |= 1185 PERF_FORMAT_TOTAL_TIME_ENABLED | 1186 PERF_FORMAT_TOTAL_TIME_RUNNING | 1187 PERF_FORMAT_ID; 1188 attr->inherit_stat = 1; 1189 } 1190 1191 if (opts->sample_address) { 1192 evsel__set_sample_bit(evsel, ADDR); 1193 attr->mmap_data = track; 1194 } 1195 1196 /* 1197 * We don't allow user space callchains for function trace 1198 * event, due to issues with page faults while tracing page 1199 * fault handler and its overall trickiness nature. 1200 */ 1201 if (evsel__is_function_event(evsel)) 1202 evsel->core.attr.exclude_callchain_user = 1; 1203 1204 if (callchain && callchain->enabled && !evsel->no_aux_samples) 1205 evsel__config_callchain(evsel, opts, callchain); 1206 1207 if (opts->sample_intr_regs && !evsel->no_aux_samples && 1208 !evsel__is_dummy_event(evsel)) { 1209 attr->sample_regs_intr = opts->sample_intr_regs; 1210 evsel__set_sample_bit(evsel, REGS_INTR); 1211 } 1212 1213 if (opts->sample_user_regs && !evsel->no_aux_samples && 1214 !evsel__is_dummy_event(evsel)) { 1215 attr->sample_regs_user |= opts->sample_user_regs; 1216 evsel__set_sample_bit(evsel, REGS_USER); 1217 } 1218 1219 if (target__has_cpu(&opts->target) || opts->sample_cpu) 1220 evsel__set_sample_bit(evsel, CPU); 1221 1222 /* 1223 * When the user explicitly disabled time don't force it here. 1224 */ 1225 if (opts->sample_time && 1226 (!perf_missing_features.sample_id_all && 1227 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu || 1228 opts->sample_time_set))) 1229 evsel__set_sample_bit(evsel, TIME); 1230 1231 if (opts->raw_samples && !evsel->no_aux_samples) { 1232 evsel__set_sample_bit(evsel, TIME); 1233 evsel__set_sample_bit(evsel, RAW); 1234 evsel__set_sample_bit(evsel, CPU); 1235 } 1236 1237 if (opts->sample_address) 1238 evsel__set_sample_bit(evsel, DATA_SRC); 1239 1240 if (opts->sample_phys_addr) 1241 evsel__set_sample_bit(evsel, PHYS_ADDR); 1242 1243 if (opts->no_buffering) { 1244 attr->watermark = 0; 1245 attr->wakeup_events = 1; 1246 } 1247 if (opts->branch_stack && !evsel->no_aux_samples) { 1248 evsel__set_sample_bit(evsel, BRANCH_STACK); 1249 attr->branch_sample_type = opts->branch_stack; 1250 } 1251 1252 if (opts->sample_weight) 1253 arch_evsel__set_sample_weight(evsel); 1254 1255 attr->task = track; 1256 attr->mmap = track; 1257 attr->mmap2 = track && !perf_missing_features.mmap2; 1258 attr->comm = track; 1259 attr->build_id = track && opts->build_id; 1260 1261 /* 1262 * ksymbol is tracked separately with text poke because it needs to be 1263 * system wide and enabled immediately. 1264 */ 1265 if (!opts->text_poke) 1266 attr->ksymbol = track && !perf_missing_features.ksymbol; 1267 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf; 1268 1269 if (opts->record_namespaces) 1270 attr->namespaces = track; 1271 1272 if (opts->record_cgroup) { 1273 attr->cgroup = track && !perf_missing_features.cgroup; 1274 evsel__set_sample_bit(evsel, CGROUP); 1275 } 1276 1277 if (opts->sample_data_page_size) 1278 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE); 1279 1280 if (opts->sample_code_page_size) 1281 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE); 1282 1283 if (opts->record_switch_events) 1284 attr->context_switch = track; 1285 1286 if (opts->sample_transaction) 1287 evsel__set_sample_bit(evsel, TRANSACTION); 1288 1289 if (opts->running_time) { 1290 evsel->core.attr.read_format |= 1291 PERF_FORMAT_TOTAL_TIME_ENABLED | 1292 PERF_FORMAT_TOTAL_TIME_RUNNING; 1293 } 1294 1295 /* 1296 * XXX see the function comment above 1297 * 1298 * Disabling only independent events or group leaders, 1299 * keeping group members enabled. 1300 */ 1301 if (evsel__is_group_leader(evsel)) 1302 attr->disabled = 1; 1303 1304 /* 1305 * Setting enable_on_exec for independent events and 1306 * group leaders for traced executed by perf. 1307 */ 1308 if (target__none(&opts->target) && evsel__is_group_leader(evsel) && 1309 !opts->target.initial_delay) 1310 attr->enable_on_exec = 1; 1311 1312 if (evsel->immediate) { 1313 attr->disabled = 0; 1314 attr->enable_on_exec = 0; 1315 } 1316 1317 clockid = opts->clockid; 1318 if (opts->use_clockid) { 1319 attr->use_clockid = 1; 1320 attr->clockid = opts->clockid; 1321 } 1322 1323 if (evsel->precise_max) 1324 attr->precise_ip = 3; 1325 1326 if (opts->all_user) { 1327 attr->exclude_kernel = 1; 1328 attr->exclude_user = 0; 1329 } 1330 1331 if (opts->all_kernel) { 1332 attr->exclude_kernel = 0; 1333 attr->exclude_user = 1; 1334 } 1335 1336 if (evsel->core.own_cpus || evsel->unit) 1337 evsel->core.attr.read_format |= PERF_FORMAT_ID; 1338 1339 /* 1340 * Apply event specific term settings, 1341 * it overloads any global configuration. 1342 */ 1343 evsel__apply_config_terms(evsel, opts, track); 1344 1345 evsel->ignore_missing_thread = opts->ignore_missing_thread; 1346 1347 /* The --period option takes the precedence. */ 1348 if (opts->period_set) { 1349 if (opts->period) 1350 evsel__set_sample_bit(evsel, PERIOD); 1351 else 1352 evsel__reset_sample_bit(evsel, PERIOD); 1353 } 1354 1355 /* 1356 * A dummy event never triggers any actual counter and therefore 1357 * cannot be used with branch_stack. 1358 * 1359 * For initial_delay, a dummy event is added implicitly. 1360 * The software event will trigger -EOPNOTSUPP error out, 1361 * if BRANCH_STACK bit is set. 1362 */ 1363 if (evsel__is_dummy_event(evsel)) 1364 evsel__reset_sample_bit(evsel, BRANCH_STACK); 1365 1366 if (evsel__is_offcpu_event(evsel)) 1367 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES; 1368 1369 arch__post_evsel_config(evsel, attr); 1370 } 1371 1372 int evsel__set_filter(struct evsel *evsel, const char *filter) 1373 { 1374 char *new_filter = strdup(filter); 1375 1376 if (new_filter != NULL) { 1377 free(evsel->filter); 1378 evsel->filter = new_filter; 1379 return 0; 1380 } 1381 1382 return -1; 1383 } 1384 1385 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter) 1386 { 1387 char *new_filter; 1388 1389 if (evsel->filter == NULL) 1390 return evsel__set_filter(evsel, filter); 1391 1392 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) { 1393 free(evsel->filter); 1394 evsel->filter = new_filter; 1395 return 0; 1396 } 1397 1398 return -1; 1399 } 1400 1401 int evsel__append_tp_filter(struct evsel *evsel, const char *filter) 1402 { 1403 return evsel__append_filter(evsel, "(%s) && (%s)", filter); 1404 } 1405 1406 int evsel__append_addr_filter(struct evsel *evsel, const char *filter) 1407 { 1408 return evsel__append_filter(evsel, "%s,%s", filter); 1409 } 1410 1411 /* Caller has to clear disabled after going through all CPUs. */ 1412 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx) 1413 { 1414 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx); 1415 } 1416 1417 int evsel__enable(struct evsel *evsel) 1418 { 1419 int err = perf_evsel__enable(&evsel->core); 1420 1421 if (!err) 1422 evsel->disabled = false; 1423 return err; 1424 } 1425 1426 /* Caller has to set disabled after going through all CPUs. */ 1427 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx) 1428 { 1429 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx); 1430 } 1431 1432 int evsel__disable(struct evsel *evsel) 1433 { 1434 int err = perf_evsel__disable(&evsel->core); 1435 /* 1436 * We mark it disabled here so that tools that disable a event can 1437 * ignore events after they disable it. I.e. the ring buffer may have 1438 * already a few more events queued up before the kernel got the stop 1439 * request. 1440 */ 1441 if (!err) 1442 evsel->disabled = true; 1443 1444 return err; 1445 } 1446 1447 void free_config_terms(struct list_head *config_terms) 1448 { 1449 struct evsel_config_term *term, *h; 1450 1451 list_for_each_entry_safe(term, h, config_terms, list) { 1452 list_del_init(&term->list); 1453 if (term->free_str) 1454 zfree(&term->val.str); 1455 free(term); 1456 } 1457 } 1458 1459 static void evsel__free_config_terms(struct evsel *evsel) 1460 { 1461 free_config_terms(&evsel->config_terms); 1462 } 1463 1464 void evsel__exit(struct evsel *evsel) 1465 { 1466 assert(list_empty(&evsel->core.node)); 1467 assert(evsel->evlist == NULL); 1468 bpf_counter__destroy(evsel); 1469 perf_bpf_filter__destroy(evsel); 1470 evsel__free_counts(evsel); 1471 perf_evsel__free_fd(&evsel->core); 1472 perf_evsel__free_id(&evsel->core); 1473 evsel__free_config_terms(evsel); 1474 cgroup__put(evsel->cgrp); 1475 perf_cpu_map__put(evsel->core.cpus); 1476 perf_cpu_map__put(evsel->core.own_cpus); 1477 perf_thread_map__put(evsel->core.threads); 1478 zfree(&evsel->group_name); 1479 zfree(&evsel->name); 1480 zfree(&evsel->filter); 1481 zfree(&evsel->pmu_name); 1482 zfree(&evsel->group_pmu_name); 1483 zfree(&evsel->unit); 1484 zfree(&evsel->metric_id); 1485 evsel__zero_per_pkg(evsel); 1486 hashmap__free(evsel->per_pkg_mask); 1487 evsel->per_pkg_mask = NULL; 1488 zfree(&evsel->metric_events); 1489 perf_evsel__object.fini(evsel); 1490 } 1491 1492 void evsel__delete(struct evsel *evsel) 1493 { 1494 if (!evsel) 1495 return; 1496 1497 evsel__exit(evsel); 1498 free(evsel); 1499 } 1500 1501 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread, 1502 struct perf_counts_values *count) 1503 { 1504 struct perf_counts_values tmp; 1505 1506 if (!evsel->prev_raw_counts) 1507 return; 1508 1509 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread); 1510 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count; 1511 1512 count->val = count->val - tmp.val; 1513 count->ena = count->ena - tmp.ena; 1514 count->run = count->run - tmp.run; 1515 } 1516 1517 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread) 1518 { 1519 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread); 1520 1521 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count); 1522 } 1523 1524 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread, 1525 u64 val, u64 ena, u64 run, u64 lost) 1526 { 1527 struct perf_counts_values *count; 1528 1529 count = perf_counts(counter->counts, cpu_map_idx, thread); 1530 1531 count->val = val; 1532 count->ena = ena; 1533 count->run = run; 1534 count->lost = lost; 1535 1536 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true); 1537 } 1538 1539 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data) 1540 { 1541 u64 read_format = leader->core.attr.read_format; 1542 struct sample_read_value *v; 1543 u64 nr, ena = 0, run = 0, lost = 0; 1544 1545 nr = *data++; 1546 1547 if (nr != (u64) leader->core.nr_members) 1548 return -EINVAL; 1549 1550 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1551 ena = *data++; 1552 1553 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1554 run = *data++; 1555 1556 v = (void *)data; 1557 sample_read_group__for_each(v, nr, read_format) { 1558 struct evsel *counter; 1559 1560 counter = evlist__id2evsel(leader->evlist, v->id); 1561 if (!counter) 1562 return -EINVAL; 1563 1564 if (read_format & PERF_FORMAT_LOST) 1565 lost = v->lost; 1566 1567 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost); 1568 } 1569 1570 return 0; 1571 } 1572 1573 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread) 1574 { 1575 struct perf_stat_evsel *ps = leader->stats; 1576 u64 read_format = leader->core.attr.read_format; 1577 int size = perf_evsel__read_size(&leader->core); 1578 u64 *data = ps->group_data; 1579 1580 if (!(read_format & PERF_FORMAT_ID)) 1581 return -EINVAL; 1582 1583 if (!evsel__is_group_leader(leader)) 1584 return -EINVAL; 1585 1586 if (!data) { 1587 data = zalloc(size); 1588 if (!data) 1589 return -ENOMEM; 1590 1591 ps->group_data = data; 1592 } 1593 1594 if (FD(leader, cpu_map_idx, thread) < 0) 1595 return -EINVAL; 1596 1597 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0) 1598 return -errno; 1599 1600 return evsel__process_group_data(leader, cpu_map_idx, thread, data); 1601 } 1602 1603 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread) 1604 { 1605 u64 read_format = evsel->core.attr.read_format; 1606 1607 if (read_format & PERF_FORMAT_GROUP) 1608 return evsel__read_group(evsel, cpu_map_idx, thread); 1609 1610 return evsel__read_one(evsel, cpu_map_idx, thread); 1611 } 1612 1613 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale) 1614 { 1615 struct perf_counts_values count; 1616 size_t nv = scale ? 3 : 1; 1617 1618 if (FD(evsel, cpu_map_idx, thread) < 0) 1619 return -EINVAL; 1620 1621 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0) 1622 return -ENOMEM; 1623 1624 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0) 1625 return -errno; 1626 1627 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count); 1628 perf_counts_values__scale(&count, scale, NULL); 1629 *perf_counts(evsel->counts, cpu_map_idx, thread) = count; 1630 return 0; 1631 } 1632 1633 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other, 1634 int cpu_map_idx) 1635 { 1636 struct perf_cpu cpu; 1637 1638 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx); 1639 return perf_cpu_map__idx(other->core.cpus, cpu); 1640 } 1641 1642 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx) 1643 { 1644 struct evsel *leader = evsel__leader(evsel); 1645 1646 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) || 1647 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) { 1648 return evsel__match_other_cpu(evsel, leader, cpu_map_idx); 1649 } 1650 1651 return cpu_map_idx; 1652 } 1653 1654 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread) 1655 { 1656 struct evsel *leader = evsel__leader(evsel); 1657 int fd; 1658 1659 if (evsel__is_group_leader(evsel)) 1660 return -1; 1661 1662 /* 1663 * Leader must be already processed/open, 1664 * if not it's a bug. 1665 */ 1666 BUG_ON(!leader->core.fd); 1667 1668 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx); 1669 if (cpu_map_idx == -1) 1670 return -1; 1671 1672 fd = FD(leader, cpu_map_idx, thread); 1673 BUG_ON(fd == -1 && !leader->skippable); 1674 1675 /* 1676 * When the leader has been skipped, return -2 to distinguish from no 1677 * group leader case. 1678 */ 1679 return fd == -1 ? -2 : fd; 1680 } 1681 1682 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx) 1683 { 1684 for (int cpu = 0; cpu < nr_cpus; cpu++) 1685 for (int thread = thread_idx; thread < nr_threads - 1; thread++) 1686 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1); 1687 } 1688 1689 static int update_fds(struct evsel *evsel, 1690 int nr_cpus, int cpu_map_idx, 1691 int nr_threads, int thread_idx) 1692 { 1693 struct evsel *pos; 1694 1695 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads) 1696 return -EINVAL; 1697 1698 evlist__for_each_entry(evsel->evlist, pos) { 1699 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx; 1700 1701 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx); 1702 1703 /* 1704 * Since fds for next evsel has not been created, 1705 * there is no need to iterate whole event list. 1706 */ 1707 if (pos == evsel) 1708 break; 1709 } 1710 return 0; 1711 } 1712 1713 static bool evsel__ignore_missing_thread(struct evsel *evsel, 1714 int nr_cpus, int cpu_map_idx, 1715 struct perf_thread_map *threads, 1716 int thread, int err) 1717 { 1718 pid_t ignore_pid = perf_thread_map__pid(threads, thread); 1719 1720 if (!evsel->ignore_missing_thread) 1721 return false; 1722 1723 /* The system wide setup does not work with threads. */ 1724 if (evsel->core.system_wide) 1725 return false; 1726 1727 /* The -ESRCH is perf event syscall errno for pid's not found. */ 1728 if (err != -ESRCH) 1729 return false; 1730 1731 /* If there's only one thread, let it fail. */ 1732 if (threads->nr == 1) 1733 return false; 1734 1735 /* 1736 * We should remove fd for missing_thread first 1737 * because thread_map__remove() will decrease threads->nr. 1738 */ 1739 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread)) 1740 return false; 1741 1742 if (thread_map__remove(threads, thread)) 1743 return false; 1744 1745 pr_warning("WARNING: Ignored open failure for pid %d\n", 1746 ignore_pid); 1747 return true; 1748 } 1749 1750 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val, 1751 void *priv __maybe_unused) 1752 { 1753 return fprintf(fp, " %-32s %s\n", name, val); 1754 } 1755 1756 static void display_attr(struct perf_event_attr *attr) 1757 { 1758 if (verbose >= 2 || debug_peo_args) { 1759 fprintf(stderr, "%.60s\n", graph_dotted_line); 1760 fprintf(stderr, "perf_event_attr:\n"); 1761 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL); 1762 fprintf(stderr, "%.60s\n", graph_dotted_line); 1763 } 1764 } 1765 1766 bool evsel__precise_ip_fallback(struct evsel *evsel) 1767 { 1768 /* Do not try less precise if not requested. */ 1769 if (!evsel->precise_max) 1770 return false; 1771 1772 /* 1773 * We tried all the precise_ip values, and it's 1774 * still failing, so leave it to standard fallback. 1775 */ 1776 if (!evsel->core.attr.precise_ip) { 1777 evsel->core.attr.precise_ip = evsel->precise_ip_original; 1778 return false; 1779 } 1780 1781 if (!evsel->precise_ip_original) 1782 evsel->precise_ip_original = evsel->core.attr.precise_ip; 1783 1784 evsel->core.attr.precise_ip--; 1785 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip); 1786 display_attr(&evsel->core.attr); 1787 return true; 1788 } 1789 1790 static struct perf_cpu_map *empty_cpu_map; 1791 static struct perf_thread_map *empty_thread_map; 1792 1793 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus, 1794 struct perf_thread_map *threads) 1795 { 1796 int nthreads = perf_thread_map__nr(threads); 1797 1798 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) || 1799 (perf_missing_features.aux_output && evsel->core.attr.aux_output)) 1800 return -EINVAL; 1801 1802 if (cpus == NULL) { 1803 if (empty_cpu_map == NULL) { 1804 empty_cpu_map = perf_cpu_map__new_any_cpu(); 1805 if (empty_cpu_map == NULL) 1806 return -ENOMEM; 1807 } 1808 1809 cpus = empty_cpu_map; 1810 } 1811 1812 if (threads == NULL) { 1813 if (empty_thread_map == NULL) { 1814 empty_thread_map = thread_map__new_by_tid(-1); 1815 if (empty_thread_map == NULL) 1816 return -ENOMEM; 1817 } 1818 1819 threads = empty_thread_map; 1820 } 1821 1822 if (evsel->core.fd == NULL && 1823 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0) 1824 return -ENOMEM; 1825 1826 evsel->open_flags = PERF_FLAG_FD_CLOEXEC; 1827 if (evsel->cgrp) 1828 evsel->open_flags |= PERF_FLAG_PID_CGROUP; 1829 1830 return 0; 1831 } 1832 1833 static void evsel__disable_missing_features(struct evsel *evsel) 1834 { 1835 if (perf_missing_features.branch_counters) 1836 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_COUNTERS; 1837 if (perf_missing_features.read_lost) 1838 evsel->core.attr.read_format &= ~PERF_FORMAT_LOST; 1839 if (perf_missing_features.weight_struct) { 1840 evsel__set_sample_bit(evsel, WEIGHT); 1841 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT); 1842 } 1843 if (perf_missing_features.clockid_wrong) 1844 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */ 1845 if (perf_missing_features.clockid) { 1846 evsel->core.attr.use_clockid = 0; 1847 evsel->core.attr.clockid = 0; 1848 } 1849 if (perf_missing_features.cloexec) 1850 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; 1851 if (perf_missing_features.mmap2) 1852 evsel->core.attr.mmap2 = 0; 1853 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest) 1854 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0; 1855 if (perf_missing_features.lbr_flags) 1856 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS | 1857 PERF_SAMPLE_BRANCH_NO_CYCLES); 1858 if (perf_missing_features.group_read && evsel->core.attr.inherit) 1859 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID); 1860 if (perf_missing_features.ksymbol) 1861 evsel->core.attr.ksymbol = 0; 1862 if (perf_missing_features.bpf) 1863 evsel->core.attr.bpf_event = 0; 1864 if (perf_missing_features.branch_hw_idx) 1865 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX; 1866 if (perf_missing_features.sample_id_all) 1867 evsel->core.attr.sample_id_all = 0; 1868 } 1869 1870 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus, 1871 struct perf_thread_map *threads) 1872 { 1873 int err; 1874 1875 err = __evsel__prepare_open(evsel, cpus, threads); 1876 if (err) 1877 return err; 1878 1879 evsel__disable_missing_features(evsel); 1880 1881 return err; 1882 } 1883 1884 bool evsel__detect_missing_features(struct evsel *evsel) 1885 { 1886 /* 1887 * Must probe features in the order they were added to the 1888 * perf_event_attr interface. 1889 */ 1890 if (!perf_missing_features.branch_counters && 1891 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS)) { 1892 perf_missing_features.branch_counters = true; 1893 pr_debug2("switching off branch counters support\n"); 1894 return true; 1895 } else if (!perf_missing_features.read_lost && 1896 (evsel->core.attr.read_format & PERF_FORMAT_LOST)) { 1897 perf_missing_features.read_lost = true; 1898 pr_debug2("switching off PERF_FORMAT_LOST support\n"); 1899 return true; 1900 } else if (!perf_missing_features.weight_struct && 1901 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) { 1902 perf_missing_features.weight_struct = true; 1903 pr_debug2("switching off weight struct support\n"); 1904 return true; 1905 } else if (!perf_missing_features.code_page_size && 1906 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) { 1907 perf_missing_features.code_page_size = true; 1908 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n"); 1909 return false; 1910 } else if (!perf_missing_features.data_page_size && 1911 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) { 1912 perf_missing_features.data_page_size = true; 1913 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n"); 1914 return false; 1915 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) { 1916 perf_missing_features.cgroup = true; 1917 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n"); 1918 return false; 1919 } else if (!perf_missing_features.branch_hw_idx && 1920 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) { 1921 perf_missing_features.branch_hw_idx = true; 1922 pr_debug2("switching off branch HW index support\n"); 1923 return true; 1924 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) { 1925 perf_missing_features.aux_output = true; 1926 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n"); 1927 return false; 1928 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) { 1929 perf_missing_features.bpf = true; 1930 pr_debug2_peo("switching off bpf_event\n"); 1931 return true; 1932 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) { 1933 perf_missing_features.ksymbol = true; 1934 pr_debug2_peo("switching off ksymbol\n"); 1935 return true; 1936 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) { 1937 perf_missing_features.write_backward = true; 1938 pr_debug2_peo("switching off write_backward\n"); 1939 return false; 1940 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) { 1941 perf_missing_features.clockid_wrong = true; 1942 pr_debug2_peo("switching off clockid\n"); 1943 return true; 1944 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) { 1945 perf_missing_features.clockid = true; 1946 pr_debug2_peo("switching off use_clockid\n"); 1947 return true; 1948 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) { 1949 perf_missing_features.cloexec = true; 1950 pr_debug2_peo("switching off cloexec flag\n"); 1951 return true; 1952 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) { 1953 perf_missing_features.mmap2 = true; 1954 pr_debug2_peo("switching off mmap2\n"); 1955 return true; 1956 } else if (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) { 1957 if (evsel->pmu == NULL) 1958 evsel->pmu = evsel__find_pmu(evsel); 1959 1960 if (evsel->pmu) 1961 evsel->pmu->missing_features.exclude_guest = true; 1962 else { 1963 /* we cannot find PMU, disable attrs now */ 1964 evsel->core.attr.exclude_host = false; 1965 evsel->core.attr.exclude_guest = false; 1966 } 1967 1968 if (evsel->exclude_GH) { 1969 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n"); 1970 return false; 1971 } 1972 if (!perf_missing_features.exclude_guest) { 1973 perf_missing_features.exclude_guest = true; 1974 pr_debug2_peo("switching off exclude_guest, exclude_host\n"); 1975 } 1976 return true; 1977 } else if (!perf_missing_features.sample_id_all) { 1978 perf_missing_features.sample_id_all = true; 1979 pr_debug2_peo("switching off sample_id_all\n"); 1980 return true; 1981 } else if (!perf_missing_features.lbr_flags && 1982 (evsel->core.attr.branch_sample_type & 1983 (PERF_SAMPLE_BRANCH_NO_CYCLES | 1984 PERF_SAMPLE_BRANCH_NO_FLAGS))) { 1985 perf_missing_features.lbr_flags = true; 1986 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n"); 1987 return true; 1988 } else if (!perf_missing_features.group_read && 1989 evsel->core.attr.inherit && 1990 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) && 1991 evsel__is_group_leader(evsel)) { 1992 perf_missing_features.group_read = true; 1993 pr_debug2_peo("switching off group read\n"); 1994 return true; 1995 } else { 1996 return false; 1997 } 1998 } 1999 2000 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, 2001 struct perf_thread_map *threads, 2002 int start_cpu_map_idx, int end_cpu_map_idx) 2003 { 2004 int idx, thread, nthreads; 2005 int pid = -1, err, old_errno; 2006 enum rlimit_action set_rlimit = NO_CHANGE; 2007 2008 err = __evsel__prepare_open(evsel, cpus, threads); 2009 if (err) 2010 return err; 2011 2012 if (cpus == NULL) 2013 cpus = empty_cpu_map; 2014 2015 if (threads == NULL) 2016 threads = empty_thread_map; 2017 2018 nthreads = perf_thread_map__nr(threads); 2019 2020 if (evsel->cgrp) 2021 pid = evsel->cgrp->fd; 2022 2023 fallback_missing_features: 2024 evsel__disable_missing_features(evsel); 2025 2026 pr_debug3("Opening: %s\n", evsel__name(evsel)); 2027 display_attr(&evsel->core.attr); 2028 2029 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) { 2030 2031 for (thread = 0; thread < nthreads; thread++) { 2032 int fd, group_fd; 2033 retry_open: 2034 if (thread >= nthreads) 2035 break; 2036 2037 if (!evsel->cgrp && !evsel->core.system_wide) 2038 pid = perf_thread_map__pid(threads, thread); 2039 2040 group_fd = get_group_fd(evsel, idx, thread); 2041 2042 if (group_fd == -2) { 2043 pr_debug("broken group leader for %s\n", evsel->name); 2044 err = -EINVAL; 2045 goto out_close; 2046 } 2047 2048 test_attr__ready(); 2049 2050 /* Debug message used by test scripts */ 2051 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx", 2052 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags); 2053 2054 fd = sys_perf_event_open(&evsel->core.attr, pid, 2055 perf_cpu_map__cpu(cpus, idx).cpu, 2056 group_fd, evsel->open_flags); 2057 2058 FD(evsel, idx, thread) = fd; 2059 2060 if (fd < 0) { 2061 err = -errno; 2062 2063 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", 2064 err); 2065 goto try_fallback; 2066 } 2067 2068 bpf_counter__install_pe(evsel, idx, fd); 2069 2070 if (unlikely(test_attr__enabled)) { 2071 test_attr__open(&evsel->core.attr, pid, 2072 perf_cpu_map__cpu(cpus, idx), 2073 fd, group_fd, evsel->open_flags); 2074 } 2075 2076 /* Debug message used by test scripts */ 2077 pr_debug2_peo(" = %d\n", fd); 2078 2079 if (evsel->bpf_fd >= 0) { 2080 int evt_fd = fd; 2081 int bpf_fd = evsel->bpf_fd; 2082 2083 err = ioctl(evt_fd, 2084 PERF_EVENT_IOC_SET_BPF, 2085 bpf_fd); 2086 if (err && errno != EEXIST) { 2087 pr_err("failed to attach bpf fd %d: %s\n", 2088 bpf_fd, strerror(errno)); 2089 err = -EINVAL; 2090 goto out_close; 2091 } 2092 } 2093 2094 set_rlimit = NO_CHANGE; 2095 2096 /* 2097 * If we succeeded but had to kill clockid, fail and 2098 * have evsel__open_strerror() print us a nice error. 2099 */ 2100 if (perf_missing_features.clockid || 2101 perf_missing_features.clockid_wrong) { 2102 err = -EINVAL; 2103 goto out_close; 2104 } 2105 } 2106 } 2107 2108 return 0; 2109 2110 try_fallback: 2111 if (evsel__precise_ip_fallback(evsel)) 2112 goto retry_open; 2113 2114 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus), 2115 idx, threads, thread, err)) { 2116 /* We just removed 1 thread, so lower the upper nthreads limit. */ 2117 nthreads--; 2118 2119 /* ... and pretend like nothing have happened. */ 2120 err = 0; 2121 goto retry_open; 2122 } 2123 /* 2124 * perf stat needs between 5 and 22 fds per CPU. When we run out 2125 * of them try to increase the limits. 2126 */ 2127 if (err == -EMFILE && rlimit__increase_nofile(&set_rlimit)) 2128 goto retry_open; 2129 2130 if (err != -EINVAL || idx > 0 || thread > 0) 2131 goto out_close; 2132 2133 if (evsel__detect_missing_features(evsel)) 2134 goto fallback_missing_features; 2135 out_close: 2136 if (err) 2137 threads->err_thread = thread; 2138 2139 old_errno = errno; 2140 do { 2141 while (--thread >= 0) { 2142 if (FD(evsel, idx, thread) >= 0) 2143 close(FD(evsel, idx, thread)); 2144 FD(evsel, idx, thread) = -1; 2145 } 2146 thread = nthreads; 2147 } while (--idx >= 0); 2148 errno = old_errno; 2149 return err; 2150 } 2151 2152 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus, 2153 struct perf_thread_map *threads) 2154 { 2155 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus)); 2156 } 2157 2158 void evsel__close(struct evsel *evsel) 2159 { 2160 perf_evsel__close(&evsel->core); 2161 perf_evsel__free_id(&evsel->core); 2162 } 2163 2164 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx) 2165 { 2166 if (cpu_map_idx == -1) 2167 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus)); 2168 2169 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1); 2170 } 2171 2172 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads) 2173 { 2174 return evsel__open(evsel, NULL, threads); 2175 } 2176 2177 static int perf_evsel__parse_id_sample(const struct evsel *evsel, 2178 const union perf_event *event, 2179 struct perf_sample *sample) 2180 { 2181 u64 type = evsel->core.attr.sample_type; 2182 const __u64 *array = event->sample.array; 2183 bool swapped = evsel->needs_swap; 2184 union u64_swap u; 2185 2186 array += ((event->header.size - 2187 sizeof(event->header)) / sizeof(u64)) - 1; 2188 2189 if (type & PERF_SAMPLE_IDENTIFIER) { 2190 sample->id = *array; 2191 array--; 2192 } 2193 2194 if (type & PERF_SAMPLE_CPU) { 2195 u.val64 = *array; 2196 if (swapped) { 2197 /* undo swap of u64, then swap on individual u32s */ 2198 u.val64 = bswap_64(u.val64); 2199 u.val32[0] = bswap_32(u.val32[0]); 2200 } 2201 2202 sample->cpu = u.val32[0]; 2203 array--; 2204 } 2205 2206 if (type & PERF_SAMPLE_STREAM_ID) { 2207 sample->stream_id = *array; 2208 array--; 2209 } 2210 2211 if (type & PERF_SAMPLE_ID) { 2212 sample->id = *array; 2213 array--; 2214 } 2215 2216 if (type & PERF_SAMPLE_TIME) { 2217 sample->time = *array; 2218 array--; 2219 } 2220 2221 if (type & PERF_SAMPLE_TID) { 2222 u.val64 = *array; 2223 if (swapped) { 2224 /* undo swap of u64, then swap on individual u32s */ 2225 u.val64 = bswap_64(u.val64); 2226 u.val32[0] = bswap_32(u.val32[0]); 2227 u.val32[1] = bswap_32(u.val32[1]); 2228 } 2229 2230 sample->pid = u.val32[0]; 2231 sample->tid = u.val32[1]; 2232 array--; 2233 } 2234 2235 return 0; 2236 } 2237 2238 static inline bool overflow(const void *endp, u16 max_size, const void *offset, 2239 u64 size) 2240 { 2241 return size > max_size || offset + size > endp; 2242 } 2243 2244 #define OVERFLOW_CHECK(offset, size, max_size) \ 2245 do { \ 2246 if (overflow(endp, (max_size), (offset), (size))) \ 2247 return -EFAULT; \ 2248 } while (0) 2249 2250 #define OVERFLOW_CHECK_u64(offset) \ 2251 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) 2252 2253 static int 2254 perf_event__check_size(union perf_event *event, unsigned int sample_size) 2255 { 2256 /* 2257 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes 2258 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to 2259 * check the format does not go past the end of the event. 2260 */ 2261 if (sample_size + sizeof(event->header) > event->header.size) 2262 return -EFAULT; 2263 2264 return 0; 2265 } 2266 2267 void __weak arch_perf_parse_sample_weight(struct perf_sample *data, 2268 const __u64 *array, 2269 u64 type __maybe_unused) 2270 { 2271 data->weight = *array; 2272 } 2273 2274 u64 evsel__bitfield_swap_branch_flags(u64 value) 2275 { 2276 u64 new_val = 0; 2277 2278 /* 2279 * branch_flags 2280 * union { 2281 * u64 values; 2282 * struct { 2283 * mispred:1 //target mispredicted 2284 * predicted:1 //target predicted 2285 * in_tx:1 //in transaction 2286 * abort:1 //transaction abort 2287 * cycles:16 //cycle count to last branch 2288 * type:4 //branch type 2289 * spec:2 //branch speculation info 2290 * new_type:4 //additional branch type 2291 * priv:3 //privilege level 2292 * reserved:31 2293 * } 2294 * } 2295 * 2296 * Avoid bswap64() the entire branch_flag.value, 2297 * as it has variable bit-field sizes. Instead the 2298 * macro takes the bit-field position/size, 2299 * swaps it based on the host endianness. 2300 */ 2301 if (host_is_bigendian()) { 2302 new_val = bitfield_swap(value, 0, 1); 2303 new_val |= bitfield_swap(value, 1, 1); 2304 new_val |= bitfield_swap(value, 2, 1); 2305 new_val |= bitfield_swap(value, 3, 1); 2306 new_val |= bitfield_swap(value, 4, 16); 2307 new_val |= bitfield_swap(value, 20, 4); 2308 new_val |= bitfield_swap(value, 24, 2); 2309 new_val |= bitfield_swap(value, 26, 4); 2310 new_val |= bitfield_swap(value, 30, 3); 2311 new_val |= bitfield_swap(value, 33, 31); 2312 } else { 2313 new_val = bitfield_swap(value, 63, 1); 2314 new_val |= bitfield_swap(value, 62, 1); 2315 new_val |= bitfield_swap(value, 61, 1); 2316 new_val |= bitfield_swap(value, 60, 1); 2317 new_val |= bitfield_swap(value, 44, 16); 2318 new_val |= bitfield_swap(value, 40, 4); 2319 new_val |= bitfield_swap(value, 38, 2); 2320 new_val |= bitfield_swap(value, 34, 4); 2321 new_val |= bitfield_swap(value, 31, 3); 2322 new_val |= bitfield_swap(value, 0, 31); 2323 } 2324 2325 return new_val; 2326 } 2327 2328 static inline bool evsel__has_branch_counters(const struct evsel *evsel) 2329 { 2330 struct evsel *cur, *leader = evsel__leader(evsel); 2331 2332 /* The branch counters feature only supports group */ 2333 if (!leader || !evsel->evlist) 2334 return false; 2335 2336 evlist__for_each_entry(evsel->evlist, cur) { 2337 if ((leader == evsel__leader(cur)) && 2338 (cur->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS)) 2339 return true; 2340 } 2341 return false; 2342 } 2343 2344 int evsel__parse_sample(struct evsel *evsel, union perf_event *event, 2345 struct perf_sample *data) 2346 { 2347 u64 type = evsel->core.attr.sample_type; 2348 bool swapped = evsel->needs_swap; 2349 const __u64 *array; 2350 u16 max_size = event->header.size; 2351 const void *endp = (void *)event + max_size; 2352 u64 sz; 2353 2354 /* 2355 * used for cross-endian analysis. See git commit 65014ab3 2356 * for why this goofiness is needed. 2357 */ 2358 union u64_swap u; 2359 2360 memset(data, 0, sizeof(*data)); 2361 data->cpu = data->pid = data->tid = -1; 2362 data->stream_id = data->id = data->time = -1ULL; 2363 data->period = evsel->core.attr.sample_period; 2364 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 2365 data->misc = event->header.misc; 2366 data->data_src = PERF_MEM_DATA_SRC_NONE; 2367 data->vcpu = -1; 2368 2369 if (event->header.type != PERF_RECORD_SAMPLE) { 2370 if (!evsel->core.attr.sample_id_all) 2371 return 0; 2372 return perf_evsel__parse_id_sample(evsel, event, data); 2373 } 2374 2375 array = event->sample.array; 2376 2377 if (perf_event__check_size(event, evsel->sample_size)) 2378 return -EFAULT; 2379 2380 if (type & PERF_SAMPLE_IDENTIFIER) { 2381 data->id = *array; 2382 array++; 2383 } 2384 2385 if (type & PERF_SAMPLE_IP) { 2386 data->ip = *array; 2387 array++; 2388 } 2389 2390 if (type & PERF_SAMPLE_TID) { 2391 u.val64 = *array; 2392 if (swapped) { 2393 /* undo swap of u64, then swap on individual u32s */ 2394 u.val64 = bswap_64(u.val64); 2395 u.val32[0] = bswap_32(u.val32[0]); 2396 u.val32[1] = bswap_32(u.val32[1]); 2397 } 2398 2399 data->pid = u.val32[0]; 2400 data->tid = u.val32[1]; 2401 array++; 2402 } 2403 2404 if (type & PERF_SAMPLE_TIME) { 2405 data->time = *array; 2406 array++; 2407 } 2408 2409 if (type & PERF_SAMPLE_ADDR) { 2410 data->addr = *array; 2411 array++; 2412 } 2413 2414 if (type & PERF_SAMPLE_ID) { 2415 data->id = *array; 2416 array++; 2417 } 2418 2419 if (type & PERF_SAMPLE_STREAM_ID) { 2420 data->stream_id = *array; 2421 array++; 2422 } 2423 2424 if (type & PERF_SAMPLE_CPU) { 2425 2426 u.val64 = *array; 2427 if (swapped) { 2428 /* undo swap of u64, then swap on individual u32s */ 2429 u.val64 = bswap_64(u.val64); 2430 u.val32[0] = bswap_32(u.val32[0]); 2431 } 2432 2433 data->cpu = u.val32[0]; 2434 array++; 2435 } 2436 2437 if (type & PERF_SAMPLE_PERIOD) { 2438 data->period = *array; 2439 array++; 2440 } 2441 2442 if (type & PERF_SAMPLE_READ) { 2443 u64 read_format = evsel->core.attr.read_format; 2444 2445 OVERFLOW_CHECK_u64(array); 2446 if (read_format & PERF_FORMAT_GROUP) 2447 data->read.group.nr = *array; 2448 else 2449 data->read.one.value = *array; 2450 2451 array++; 2452 2453 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { 2454 OVERFLOW_CHECK_u64(array); 2455 data->read.time_enabled = *array; 2456 array++; 2457 } 2458 2459 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { 2460 OVERFLOW_CHECK_u64(array); 2461 data->read.time_running = *array; 2462 array++; 2463 } 2464 2465 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ 2466 if (read_format & PERF_FORMAT_GROUP) { 2467 const u64 max_group_nr = UINT64_MAX / 2468 sizeof(struct sample_read_value); 2469 2470 if (data->read.group.nr > max_group_nr) 2471 return -EFAULT; 2472 2473 sz = data->read.group.nr * sample_read_value_size(read_format); 2474 OVERFLOW_CHECK(array, sz, max_size); 2475 data->read.group.values = 2476 (struct sample_read_value *)array; 2477 array = (void *)array + sz; 2478 } else { 2479 OVERFLOW_CHECK_u64(array); 2480 data->read.one.id = *array; 2481 array++; 2482 2483 if (read_format & PERF_FORMAT_LOST) { 2484 OVERFLOW_CHECK_u64(array); 2485 data->read.one.lost = *array; 2486 array++; 2487 } 2488 } 2489 } 2490 2491 if (type & PERF_SAMPLE_CALLCHAIN) { 2492 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); 2493 2494 OVERFLOW_CHECK_u64(array); 2495 data->callchain = (struct ip_callchain *)array++; 2496 if (data->callchain->nr > max_callchain_nr) 2497 return -EFAULT; 2498 sz = data->callchain->nr * sizeof(u64); 2499 OVERFLOW_CHECK(array, sz, max_size); 2500 array = (void *)array + sz; 2501 } 2502 2503 if (type & PERF_SAMPLE_RAW) { 2504 OVERFLOW_CHECK_u64(array); 2505 u.val64 = *array; 2506 2507 /* 2508 * Undo swap of u64, then swap on individual u32s, 2509 * get the size of the raw area and undo all of the 2510 * swap. The pevent interface handles endianness by 2511 * itself. 2512 */ 2513 if (swapped) { 2514 u.val64 = bswap_64(u.val64); 2515 u.val32[0] = bswap_32(u.val32[0]); 2516 u.val32[1] = bswap_32(u.val32[1]); 2517 } 2518 data->raw_size = u.val32[0]; 2519 2520 /* 2521 * The raw data is aligned on 64bits including the 2522 * u32 size, so it's safe to use mem_bswap_64. 2523 */ 2524 if (swapped) 2525 mem_bswap_64((void *) array, data->raw_size); 2526 2527 array = (void *)array + sizeof(u32); 2528 2529 OVERFLOW_CHECK(array, data->raw_size, max_size); 2530 data->raw_data = (void *)array; 2531 array = (void *)array + data->raw_size; 2532 } 2533 2534 if (type & PERF_SAMPLE_BRANCH_STACK) { 2535 const u64 max_branch_nr = UINT64_MAX / 2536 sizeof(struct branch_entry); 2537 struct branch_entry *e; 2538 unsigned int i; 2539 2540 OVERFLOW_CHECK_u64(array); 2541 data->branch_stack = (struct branch_stack *)array++; 2542 2543 if (data->branch_stack->nr > max_branch_nr) 2544 return -EFAULT; 2545 2546 sz = data->branch_stack->nr * sizeof(struct branch_entry); 2547 if (evsel__has_branch_hw_idx(evsel)) { 2548 sz += sizeof(u64); 2549 e = &data->branch_stack->entries[0]; 2550 } else { 2551 data->no_hw_idx = true; 2552 /* 2553 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied, 2554 * only nr and entries[] will be output by kernel. 2555 */ 2556 e = (struct branch_entry *)&data->branch_stack->hw_idx; 2557 } 2558 2559 if (swapped) { 2560 /* 2561 * struct branch_flag does not have endian 2562 * specific bit field definition. And bswap 2563 * will not resolve the issue, since these 2564 * are bit fields. 2565 * 2566 * evsel__bitfield_swap_branch_flags() uses a 2567 * bitfield_swap macro to swap the bit position 2568 * based on the host endians. 2569 */ 2570 for (i = 0; i < data->branch_stack->nr; i++, e++) 2571 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value); 2572 } 2573 2574 OVERFLOW_CHECK(array, sz, max_size); 2575 array = (void *)array + sz; 2576 2577 if (evsel__has_branch_counters(evsel)) { 2578 OVERFLOW_CHECK_u64(array); 2579 2580 data->branch_stack_cntr = (u64 *)array; 2581 sz = data->branch_stack->nr * sizeof(u64); 2582 2583 OVERFLOW_CHECK(array, sz, max_size); 2584 array = (void *)array + sz; 2585 } 2586 } 2587 2588 if (type & PERF_SAMPLE_REGS_USER) { 2589 OVERFLOW_CHECK_u64(array); 2590 data->user_regs.abi = *array; 2591 array++; 2592 2593 if (data->user_regs.abi) { 2594 u64 mask = evsel->core.attr.sample_regs_user; 2595 2596 sz = hweight64(mask) * sizeof(u64); 2597 OVERFLOW_CHECK(array, sz, max_size); 2598 data->user_regs.mask = mask; 2599 data->user_regs.regs = (u64 *)array; 2600 array = (void *)array + sz; 2601 } 2602 } 2603 2604 if (type & PERF_SAMPLE_STACK_USER) { 2605 OVERFLOW_CHECK_u64(array); 2606 sz = *array++; 2607 2608 data->user_stack.offset = ((char *)(array - 1) 2609 - (char *) event); 2610 2611 if (!sz) { 2612 data->user_stack.size = 0; 2613 } else { 2614 OVERFLOW_CHECK(array, sz, max_size); 2615 data->user_stack.data = (char *)array; 2616 array = (void *)array + sz; 2617 OVERFLOW_CHECK_u64(array); 2618 data->user_stack.size = *array++; 2619 if (WARN_ONCE(data->user_stack.size > sz, 2620 "user stack dump failure\n")) 2621 return -EFAULT; 2622 } 2623 } 2624 2625 if (type & PERF_SAMPLE_WEIGHT_TYPE) { 2626 OVERFLOW_CHECK_u64(array); 2627 arch_perf_parse_sample_weight(data, array, type); 2628 array++; 2629 } 2630 2631 if (type & PERF_SAMPLE_DATA_SRC) { 2632 OVERFLOW_CHECK_u64(array); 2633 data->data_src = *array; 2634 array++; 2635 } 2636 2637 if (type & PERF_SAMPLE_TRANSACTION) { 2638 OVERFLOW_CHECK_u64(array); 2639 data->transaction = *array; 2640 array++; 2641 } 2642 2643 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE; 2644 if (type & PERF_SAMPLE_REGS_INTR) { 2645 OVERFLOW_CHECK_u64(array); 2646 data->intr_regs.abi = *array; 2647 array++; 2648 2649 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) { 2650 u64 mask = evsel->core.attr.sample_regs_intr; 2651 2652 sz = hweight64(mask) * sizeof(u64); 2653 OVERFLOW_CHECK(array, sz, max_size); 2654 data->intr_regs.mask = mask; 2655 data->intr_regs.regs = (u64 *)array; 2656 array = (void *)array + sz; 2657 } 2658 } 2659 2660 data->phys_addr = 0; 2661 if (type & PERF_SAMPLE_PHYS_ADDR) { 2662 data->phys_addr = *array; 2663 array++; 2664 } 2665 2666 data->cgroup = 0; 2667 if (type & PERF_SAMPLE_CGROUP) { 2668 data->cgroup = *array; 2669 array++; 2670 } 2671 2672 data->data_page_size = 0; 2673 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) { 2674 data->data_page_size = *array; 2675 array++; 2676 } 2677 2678 data->code_page_size = 0; 2679 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) { 2680 data->code_page_size = *array; 2681 array++; 2682 } 2683 2684 if (type & PERF_SAMPLE_AUX) { 2685 OVERFLOW_CHECK_u64(array); 2686 sz = *array++; 2687 2688 OVERFLOW_CHECK(array, sz, max_size); 2689 /* Undo swap of data */ 2690 if (swapped) 2691 mem_bswap_64((char *)array, sz); 2692 data->aux_sample.size = sz; 2693 data->aux_sample.data = (char *)array; 2694 array = (void *)array + sz; 2695 } 2696 2697 return 0; 2698 } 2699 2700 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event, 2701 u64 *timestamp) 2702 { 2703 u64 type = evsel->core.attr.sample_type; 2704 const __u64 *array; 2705 2706 if (!(type & PERF_SAMPLE_TIME)) 2707 return -1; 2708 2709 if (event->header.type != PERF_RECORD_SAMPLE) { 2710 struct perf_sample data = { 2711 .time = -1ULL, 2712 }; 2713 2714 if (!evsel->core.attr.sample_id_all) 2715 return -1; 2716 if (perf_evsel__parse_id_sample(evsel, event, &data)) 2717 return -1; 2718 2719 *timestamp = data.time; 2720 return 0; 2721 } 2722 2723 array = event->sample.array; 2724 2725 if (perf_event__check_size(event, evsel->sample_size)) 2726 return -EFAULT; 2727 2728 if (type & PERF_SAMPLE_IDENTIFIER) 2729 array++; 2730 2731 if (type & PERF_SAMPLE_IP) 2732 array++; 2733 2734 if (type & PERF_SAMPLE_TID) 2735 array++; 2736 2737 if (type & PERF_SAMPLE_TIME) 2738 *timestamp = *array; 2739 2740 return 0; 2741 } 2742 2743 u16 evsel__id_hdr_size(struct evsel *evsel) 2744 { 2745 u64 sample_type = evsel->core.attr.sample_type; 2746 u16 size = 0; 2747 2748 if (sample_type & PERF_SAMPLE_TID) 2749 size += sizeof(u64); 2750 2751 if (sample_type & PERF_SAMPLE_TIME) 2752 size += sizeof(u64); 2753 2754 if (sample_type & PERF_SAMPLE_ID) 2755 size += sizeof(u64); 2756 2757 if (sample_type & PERF_SAMPLE_STREAM_ID) 2758 size += sizeof(u64); 2759 2760 if (sample_type & PERF_SAMPLE_CPU) 2761 size += sizeof(u64); 2762 2763 if (sample_type & PERF_SAMPLE_IDENTIFIER) 2764 size += sizeof(u64); 2765 2766 return size; 2767 } 2768 2769 #ifdef HAVE_LIBTRACEEVENT 2770 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name) 2771 { 2772 return tep_find_field(evsel->tp_format, name); 2773 } 2774 2775 struct tep_format_field *evsel__common_field(struct evsel *evsel, const char *name) 2776 { 2777 return tep_find_common_field(evsel->tp_format, name); 2778 } 2779 2780 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name) 2781 { 2782 struct tep_format_field *field = evsel__field(evsel, name); 2783 int offset; 2784 2785 if (!field) 2786 return NULL; 2787 2788 offset = field->offset; 2789 2790 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2791 offset = *(int *)(sample->raw_data + field->offset); 2792 offset &= 0xffff; 2793 if (tep_field_is_relative(field->flags)) 2794 offset += field->offset + field->size; 2795 } 2796 2797 return sample->raw_data + offset; 2798 } 2799 2800 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample, 2801 bool needs_swap) 2802 { 2803 u64 value; 2804 void *ptr = sample->raw_data + field->offset; 2805 2806 switch (field->size) { 2807 case 1: 2808 return *(u8 *)ptr; 2809 case 2: 2810 value = *(u16 *)ptr; 2811 break; 2812 case 4: 2813 value = *(u32 *)ptr; 2814 break; 2815 case 8: 2816 memcpy(&value, ptr, sizeof(u64)); 2817 break; 2818 default: 2819 return 0; 2820 } 2821 2822 if (!needs_swap) 2823 return value; 2824 2825 switch (field->size) { 2826 case 2: 2827 return bswap_16(value); 2828 case 4: 2829 return bswap_32(value); 2830 case 8: 2831 return bswap_64(value); 2832 default: 2833 return 0; 2834 } 2835 2836 return 0; 2837 } 2838 2839 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name) 2840 { 2841 struct tep_format_field *field = evsel__field(evsel, name); 2842 2843 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; 2844 } 2845 2846 u64 evsel__intval_common(struct evsel *evsel, struct perf_sample *sample, const char *name) 2847 { 2848 struct tep_format_field *field = evsel__common_field(evsel, name); 2849 2850 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; 2851 } 2852 2853 char evsel__taskstate(struct evsel *evsel, struct perf_sample *sample, const char *name) 2854 { 2855 static struct tep_format_field *prev_state_field; 2856 static const char *states; 2857 struct tep_format_field *field; 2858 unsigned long long val; 2859 unsigned int bit; 2860 char state = '?'; /* '?' denotes unknown task state */ 2861 2862 field = evsel__field(evsel, name); 2863 2864 if (!field) 2865 return state; 2866 2867 if (!states || field != prev_state_field) { 2868 states = parse_task_states(field); 2869 if (!states) 2870 return state; 2871 prev_state_field = field; 2872 } 2873 2874 /* 2875 * Note since the kernel exposes TASK_REPORT_MAX to userspace 2876 * to denote the 'preempted' state, we might as welll report 2877 * 'R' for this case, which make senses to users as well. 2878 * 2879 * We can change this if we have a good reason in the future. 2880 */ 2881 val = evsel__intval(evsel, sample, name); 2882 bit = val ? ffs(val) : 0; 2883 state = (!bit || bit > strlen(states)) ? 'R' : states[bit-1]; 2884 return state; 2885 } 2886 #endif 2887 2888 bool evsel__fallback(struct evsel *evsel, struct target *target, int err, 2889 char *msg, size_t msgsize) 2890 { 2891 int paranoid; 2892 2893 if ((err == ENOENT || err == ENXIO || err == ENODEV) && 2894 evsel->core.attr.type == PERF_TYPE_HARDWARE && 2895 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) { 2896 /* 2897 * If it's cycles then fall back to hrtimer based cpu-clock sw 2898 * counter, which is always available even if no PMU support. 2899 * 2900 * PPC returns ENXIO until 2.6.37 (behavior changed with commit 2901 * b0a873e). 2902 */ 2903 evsel->core.attr.type = PERF_TYPE_SOFTWARE; 2904 evsel->core.attr.config = target__has_cpu(target) 2905 ? PERF_COUNT_SW_CPU_CLOCK 2906 : PERF_COUNT_SW_TASK_CLOCK; 2907 scnprintf(msg, msgsize, 2908 "The cycles event is not supported, trying to fall back to %s", 2909 target__has_cpu(target) ? "cpu-clock" : "task-clock"); 2910 2911 zfree(&evsel->name); 2912 return true; 2913 } else if (err == EACCES && !evsel->core.attr.exclude_kernel && 2914 (paranoid = perf_event_paranoid()) > 1) { 2915 const char *name = evsel__name(evsel); 2916 char *new_name; 2917 const char *sep = ":"; 2918 2919 /* If event has exclude user then don't exclude kernel. */ 2920 if (evsel->core.attr.exclude_user) 2921 return false; 2922 2923 /* Is there already the separator in the name. */ 2924 if (strchr(name, '/') || 2925 (strchr(name, ':') && !evsel->is_libpfm_event)) 2926 sep = ""; 2927 2928 if (asprintf(&new_name, "%s%su", name, sep) < 0) 2929 return false; 2930 2931 free(evsel->name); 2932 evsel->name = new_name; 2933 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying " 2934 "to fall back to excluding kernel and hypervisor " 2935 " samples", paranoid); 2936 evsel->core.attr.exclude_kernel = 1; 2937 evsel->core.attr.exclude_hv = 1; 2938 2939 return true; 2940 } 2941 2942 return false; 2943 } 2944 2945 static bool find_process(const char *name) 2946 { 2947 size_t len = strlen(name); 2948 DIR *dir; 2949 struct dirent *d; 2950 int ret = -1; 2951 2952 dir = opendir(procfs__mountpoint()); 2953 if (!dir) 2954 return false; 2955 2956 /* Walk through the directory. */ 2957 while (ret && (d = readdir(dir)) != NULL) { 2958 char path[PATH_MAX]; 2959 char *data; 2960 size_t size; 2961 2962 if ((d->d_type != DT_DIR) || 2963 !strcmp(".", d->d_name) || 2964 !strcmp("..", d->d_name)) 2965 continue; 2966 2967 scnprintf(path, sizeof(path), "%s/%s/comm", 2968 procfs__mountpoint(), d->d_name); 2969 2970 if (filename__read_str(path, &data, &size)) 2971 continue; 2972 2973 ret = strncmp(name, data, len); 2974 free(data); 2975 } 2976 2977 closedir(dir); 2978 return ret ? false : true; 2979 } 2980 2981 int __weak arch_evsel__open_strerror(struct evsel *evsel __maybe_unused, 2982 char *msg __maybe_unused, 2983 size_t size __maybe_unused) 2984 { 2985 return 0; 2986 } 2987 2988 int evsel__open_strerror(struct evsel *evsel, struct target *target, 2989 int err, char *msg, size_t size) 2990 { 2991 char sbuf[STRERR_BUFSIZE]; 2992 int printed = 0, enforced = 0; 2993 int ret; 2994 2995 switch (err) { 2996 case EPERM: 2997 case EACCES: 2998 printed += scnprintf(msg + printed, size - printed, 2999 "Access to performance monitoring and observability operations is limited.\n"); 3000 3001 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) { 3002 if (enforced) { 3003 printed += scnprintf(msg + printed, size - printed, 3004 "Enforced MAC policy settings (SELinux) can limit access to performance\n" 3005 "monitoring and observability operations. Inspect system audit records for\n" 3006 "more perf_event access control information and adjusting the policy.\n"); 3007 } 3008 } 3009 3010 if (err == EPERM) 3011 printed += scnprintf(msg, size, 3012 "No permission to enable %s event.\n\n", evsel__name(evsel)); 3013 3014 return scnprintf(msg + printed, size - printed, 3015 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n" 3016 "access to performance monitoring and observability operations for processes\n" 3017 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n" 3018 "More information can be found at 'Perf events and tool security' document:\n" 3019 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n" 3020 "perf_event_paranoid setting is %d:\n" 3021 " -1: Allow use of (almost) all events by all users\n" 3022 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n" 3023 ">= 0: Disallow raw and ftrace function tracepoint access\n" 3024 ">= 1: Disallow CPU event access\n" 3025 ">= 2: Disallow kernel profiling\n" 3026 "To make the adjusted perf_event_paranoid setting permanent preserve it\n" 3027 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)", 3028 perf_event_paranoid()); 3029 case ENOENT: 3030 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel)); 3031 case EMFILE: 3032 return scnprintf(msg, size, "%s", 3033 "Too many events are opened.\n" 3034 "Probably the maximum number of open file descriptors has been reached.\n" 3035 "Hint: Try again after reducing the number of events.\n" 3036 "Hint: Try increasing the limit with 'ulimit -n <limit>'"); 3037 case ENOMEM: 3038 if (evsel__has_callchain(evsel) && 3039 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) 3040 return scnprintf(msg, size, 3041 "Not enough memory to setup event with callchain.\n" 3042 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n" 3043 "Hint: Current value: %d", sysctl__max_stack()); 3044 break; 3045 case ENODEV: 3046 if (target->cpu_list) 3047 return scnprintf(msg, size, "%s", 3048 "No such device - did you specify an out-of-range profile CPU?"); 3049 break; 3050 case EOPNOTSUPP: 3051 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK) 3052 return scnprintf(msg, size, 3053 "%s: PMU Hardware or event type doesn't support branch stack sampling.", 3054 evsel__name(evsel)); 3055 if (evsel->core.attr.aux_output) 3056 return scnprintf(msg, size, 3057 "%s: PMU Hardware doesn't support 'aux_output' feature", 3058 evsel__name(evsel)); 3059 if (evsel->core.attr.sample_period != 0) 3060 return scnprintf(msg, size, 3061 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'", 3062 evsel__name(evsel)); 3063 if (evsel->core.attr.precise_ip) 3064 return scnprintf(msg, size, "%s", 3065 "\'precise\' request may not be supported. Try removing 'p' modifier."); 3066 #if defined(__i386__) || defined(__x86_64__) 3067 if (evsel->core.attr.type == PERF_TYPE_HARDWARE) 3068 return scnprintf(msg, size, "%s", 3069 "No hardware sampling interrupt available.\n"); 3070 #endif 3071 break; 3072 case EBUSY: 3073 if (find_process("oprofiled")) 3074 return scnprintf(msg, size, 3075 "The PMU counters are busy/taken by another profiler.\n" 3076 "We found oprofile daemon running, please stop it and try again."); 3077 break; 3078 case EINVAL: 3079 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size) 3080 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel."); 3081 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size) 3082 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel."); 3083 if (evsel->core.attr.write_backward && perf_missing_features.write_backward) 3084 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel."); 3085 if (perf_missing_features.clockid) 3086 return scnprintf(msg, size, "clockid feature not supported."); 3087 if (perf_missing_features.clockid_wrong) 3088 return scnprintf(msg, size, "wrong clockid (%d).", clockid); 3089 if (perf_missing_features.aux_output) 3090 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel."); 3091 if (!target__has_cpu(target)) 3092 return scnprintf(msg, size, 3093 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.", 3094 evsel__name(evsel)); 3095 3096 break; 3097 case ENODATA: 3098 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. " 3099 "Please add an auxiliary event in front of the load latency event."); 3100 default: 3101 break; 3102 } 3103 3104 ret = arch_evsel__open_strerror(evsel, msg, size); 3105 if (ret) 3106 return ret; 3107 3108 return scnprintf(msg, size, 3109 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" 3110 "/bin/dmesg | grep -i perf may provide additional information.\n", 3111 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel)); 3112 } 3113 3114 struct perf_env *evsel__env(struct evsel *evsel) 3115 { 3116 if (evsel && evsel->evlist && evsel->evlist->env) 3117 return evsel->evlist->env; 3118 return &perf_env; 3119 } 3120 3121 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist) 3122 { 3123 int cpu_map_idx, thread; 3124 3125 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) { 3126 for (thread = 0; thread < xyarray__max_y(evsel->core.fd); 3127 thread++) { 3128 int fd = FD(evsel, cpu_map_idx, thread); 3129 3130 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, 3131 cpu_map_idx, thread, fd) < 0) 3132 return -1; 3133 } 3134 } 3135 3136 return 0; 3137 } 3138 3139 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist) 3140 { 3141 struct perf_cpu_map *cpus = evsel->core.cpus; 3142 struct perf_thread_map *threads = evsel->core.threads; 3143 3144 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr)) 3145 return -ENOMEM; 3146 3147 return store_evsel_ids(evsel, evlist); 3148 } 3149 3150 void evsel__zero_per_pkg(struct evsel *evsel) 3151 { 3152 struct hashmap_entry *cur; 3153 size_t bkt; 3154 3155 if (evsel->per_pkg_mask) { 3156 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt) 3157 zfree(&cur->pkey); 3158 3159 hashmap__clear(evsel->per_pkg_mask); 3160 } 3161 } 3162 3163 /** 3164 * evsel__is_hybrid - does the evsel have a known PMU that is hybrid. Note, this 3165 * will be false on hybrid systems for hardware and legacy 3166 * cache events. 3167 */ 3168 bool evsel__is_hybrid(const struct evsel *evsel) 3169 { 3170 if (perf_pmus__num_core_pmus() == 1) 3171 return false; 3172 3173 return evsel->core.is_pmu_core; 3174 } 3175 3176 struct evsel *evsel__leader(const struct evsel *evsel) 3177 { 3178 return container_of(evsel->core.leader, struct evsel, core); 3179 } 3180 3181 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader) 3182 { 3183 return evsel->core.leader == &leader->core; 3184 } 3185 3186 bool evsel__is_leader(struct evsel *evsel) 3187 { 3188 return evsel__has_leader(evsel, evsel); 3189 } 3190 3191 void evsel__set_leader(struct evsel *evsel, struct evsel *leader) 3192 { 3193 evsel->core.leader = &leader->core; 3194 } 3195 3196 int evsel__source_count(const struct evsel *evsel) 3197 { 3198 struct evsel *pos; 3199 int count = 0; 3200 3201 evlist__for_each_entry(evsel->evlist, pos) { 3202 if (pos->metric_leader == evsel) 3203 count++; 3204 } 3205 return count; 3206 } 3207 3208 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused) 3209 { 3210 return false; 3211 } 3212 3213 /* 3214 * Remove an event from a given group (leader). 3215 * Some events, e.g., perf metrics Topdown events, 3216 * must always be grouped. Ignore the events. 3217 */ 3218 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader) 3219 { 3220 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) { 3221 evsel__set_leader(evsel, evsel); 3222 evsel->core.nr_members = 0; 3223 leader->core.nr_members--; 3224 } 3225 } 3226