tools/perf/util/evsel.c

   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 <traceevent/event-parse.h>
  16 #include <linux/hw_breakpoint.h>
  17 #include <linux/perf_event.h>
  18 #include <linux/compiler.h>
  19 #include <linux/err.h>
  20 #include <linux/zalloc.h>
  21 #include <sys/ioctl.h>
  22 #include <sys/resource.h>
  23 #include <sys/types.h>
  24 #include <dirent.h>
  25 #include <stdlib.h>
  26 #include <perf/evsel.h>
  27 #include "asm/bug.h"
  28 #include "bpf_counter.h"
  29 #include "callchain.h"
  30 #include "cgroup.h"
  31 #include "counts.h"
  32 #include "event.h"
  33 #include "evsel.h"
  34 #include "util/env.h"
  35 #include "util/evsel_config.h"
  36 #include "util/evsel_fprintf.h"
  37 #include "evlist.h"
  38 #include <perf/cpumap.h>
  39 #include "thread_map.h"
  40 #include "target.h"
  41 #include "perf_regs.h"
  42 #include "record.h"
  43 #include "debug.h"
  44 #include "trace-event.h"
  45 #include "stat.h"
  46 #include "string2.h"
  47 #include "memswap.h"
  48 #include "util.h"
  49 #include "hashmap.h"
  50 #include "pmu-hybrid.h"
  51 #include "../perf-sys.h"
  52 #include "util/parse-branch-options.h"
  53 #include <internal/xyarray.h>
  54 #include <internal/lib.h>
  55
  56 #include <linux/ctype.h>
  57
  58 struct perf_missing_features perf_missing_features;
  59
  60 static clockid_t clockid;
  61
  62 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
  63 {
  64         return 0;
  65 }
  66
  67 void __weak test_attr__ready(void) { }
  68
  69 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
  70 {
  71 }
  72
  73 static struct {
  74         size_t  size;
  75         int     (*init)(struct evsel *evsel);
  76         void    (*fini)(struct evsel *evsel);
  77 } perf_evsel__object = {
  78         .size = sizeof(struct evsel),
  79         .init = evsel__no_extra_init,
  80         .fini = evsel__no_extra_fini,
  81 };
  82
  83 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
  84                          void (*fini)(struct evsel *evsel))
  85 {
  86
  87         if (object_size == 0)
  88                 goto set_methods;
  89
  90         if (perf_evsel__object.size > object_size)
  91                 return -EINVAL;
  92
  93         perf_evsel__object.size = object_size;
  94
  95 set_methods:
  96         if (init != NULL)
  97                 perf_evsel__object.init = init;
  98
  99         if (fini != NULL)
 100                 perf_evsel__object.fini = fini;
 101
 102         return 0;
 103 }
 104
 105 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
 106
 107 int __evsel__sample_size(u64 sample_type)
 108 {
 109         u64 mask = sample_type & PERF_SAMPLE_MASK;
 110         int size = 0;
 111         int i;
 112
 113         for (i = 0; i < 64; i++) {
 114                 if (mask & (1ULL << i))
 115                         size++;
 116         }
 117
 118         size *= sizeof(u64);
 119
 120         return size;
 121 }
 122
 123 /**
 124  * __perf_evsel__calc_id_pos - calculate id_pos.
 125  * @sample_type: sample type
 126  *
 127  * This function returns the position of the event id (PERF_SAMPLE_ID or
 128  * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
 129  * perf_record_sample.
 130  */
 131 static int __perf_evsel__calc_id_pos(u64 sample_type)
 132 {
 133         int idx = 0;
 134
 135         if (sample_type & PERF_SAMPLE_IDENTIFIER)
 136                 return 0;
 137
 138         if (!(sample_type & PERF_SAMPLE_ID))
 139                 return -1;
 140
 141         if (sample_type & PERF_SAMPLE_IP)
 142                 idx += 1;
 143
 144         if (sample_type & PERF_SAMPLE_TID)
 145                 idx += 1;
 146
 147         if (sample_type & PERF_SAMPLE_TIME)
 148                 idx += 1;
 149
 150         if (sample_type & PERF_SAMPLE_ADDR)
 151                 idx += 1;
 152
 153         return idx;
 154 }
 155
 156 /**
 157  * __perf_evsel__calc_is_pos - calculate is_pos.
 158  * @sample_type: sample type
 159  *
 160  * This function returns the position (counting backwards) of the event id
 161  * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
 162  * sample_id_all is used there is an id sample appended to non-sample events.
 163  */
 164 static int __perf_evsel__calc_is_pos(u64 sample_type)
 165 {
 166         int idx = 1;
 167
 168         if (sample_type & PERF_SAMPLE_IDENTIFIER)
 169                 return 1;
 170
 171         if (!(sample_type & PERF_SAMPLE_ID))
 172                 return -1;
 173
 174         if (sample_type & PERF_SAMPLE_CPU)
 175                 idx += 1;
 176
 177         if (sample_type & PERF_SAMPLE_STREAM_ID)
 178                 idx += 1;
 179
 180         return idx;
 181 }
 182
 183 void evsel__calc_id_pos(struct evsel *evsel)
 184 {
 185         evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
 186         evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
 187 }
 188
 189 void __evsel__set_sample_bit(struct evsel *evsel,
 190                                   enum perf_event_sample_format bit)
 191 {
 192         if (!(evsel->core.attr.sample_type & bit)) {
 193                 evsel->core.attr.sample_type |= bit;
 194                 evsel->sample_size += sizeof(u64);
 195                 evsel__calc_id_pos(evsel);
 196         }
 197 }
 198
 199 void __evsel__reset_sample_bit(struct evsel *evsel,
 200                                     enum perf_event_sample_format bit)
 201 {
 202         if (evsel->core.attr.sample_type & bit) {
 203                 evsel->core.attr.sample_type &= ~bit;
 204                 evsel->sample_size -= sizeof(u64);
 205                 evsel__calc_id_pos(evsel);
 206         }
 207 }
 208
 209 void evsel__set_sample_id(struct evsel *evsel,
 210                                bool can_sample_identifier)
 211 {
 212         if (can_sample_identifier) {
 213                 evsel__reset_sample_bit(evsel, ID);
 214                 evsel__set_sample_bit(evsel, IDENTIFIER);
 215         } else {
 216                 evsel__set_sample_bit(evsel, ID);
 217         }
 218         evsel->core.attr.read_format |= PERF_FORMAT_ID;
 219 }
 220
 221 /**
 222  * evsel__is_function_event - Return whether given evsel is a function
 223  * trace event
 224  *
 225  * @evsel - evsel selector to be tested
 226  *
 227  * Return %true if event is function trace event
 228  */
 229 bool evsel__is_function_event(struct evsel *evsel)
 230 {
 231 #define FUNCTION_EVENT "ftrace:function"
 232
 233         return evsel->name &&
 234                !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
 235
 236 #undef FUNCTION_EVENT
 237 }
 238
 239 void evsel__init(struct evsel *evsel,
 240                  struct perf_event_attr *attr, int idx)
 241 {
 242         perf_evsel__init(&evsel->core, attr, idx);
 243         evsel->tracking    = !idx;
 244         evsel->unit        = strdup("");
 245         evsel->scale       = 1.0;
 246         evsel->max_events  = ULONG_MAX;
 247         evsel->evlist      = NULL;
 248         evsel->bpf_obj     = NULL;
 249         evsel->bpf_fd      = -1;
 250         INIT_LIST_HEAD(&evsel->config_terms);
 251         INIT_LIST_HEAD(&evsel->bpf_counter_list);
 252         perf_evsel__object.init(evsel);
 253         evsel->sample_size = __evsel__sample_size(attr->sample_type);
 254         evsel__calc_id_pos(evsel);
 255         evsel->cmdline_group_boundary = false;
 256         evsel->metric_expr   = NULL;
 257         evsel->metric_name   = NULL;
 258         evsel->metric_events = NULL;
 259         evsel->per_pkg_mask  = NULL;
 260         evsel->collect_stat  = false;
 261         evsel->pmu_name      = NULL;
 262 }
 263
 264 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
 265 {
 266         struct evsel *evsel = zalloc(perf_evsel__object.size);
 267
 268         if (!evsel)
 269                 return NULL;
 270         evsel__init(evsel, attr, idx);
 271
 272         if (evsel__is_bpf_output(evsel)) {
 273                 evsel->core.attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
 274                                             PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
 275                 evsel->core.attr.sample_period = 1;
 276         }
 277
 278         if (evsel__is_clock(evsel)) {
 279                 free((char *)evsel->unit);
 280                 evsel->unit = strdup("msec");
 281                 evsel->scale = 1e-6;
 282         }
 283
 284         return evsel;
 285 }
 286
 287 static bool perf_event_can_profile_kernel(void)
 288 {
 289         return perf_event_paranoid_check(1);
 290 }
 291
 292 struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
 293 {
 294         struct perf_event_attr attr = {
 295                 .type   = type,
 296                 .config = config,
 297                 .exclude_kernel = !perf_event_can_profile_kernel(),
 298         };
 299         struct evsel *evsel;
 300
 301         event_attr_init(&attr);
 302
 303         /*
 304          * Now let the usual logic to set up the perf_event_attr defaults
 305          * to kick in when we return and before perf_evsel__open() is called.
 306          */
 307         evsel = evsel__new(&attr);
 308         if (evsel == NULL)
 309                 goto out;
 310
 311         arch_evsel__fixup_new_cycles(&evsel->core.attr);
 312
 313         evsel->precise_max = true;
 314
 315         /* use asprintf() because free(evsel) assumes name is allocated */
 316         if (asprintf(&evsel->name, "cycles%s%s%.*s",
 317                      (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
 318                      attr.exclude_kernel ? "u" : "",
 319                      attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
 320                 goto error_free;
 321 out:
 322         return evsel;
 323 error_free:
 324         evsel__delete(evsel);
 325         evsel = NULL;
 326         goto out;
 327 }
 328
 329 int copy_config_terms(struct list_head *dst, struct list_head *src)
 330 {
 331         struct evsel_config_term *pos, *tmp;
 332
 333         list_for_each_entry(pos, src, list) {
 334                 tmp = malloc(sizeof(*tmp));
 335                 if (tmp == NULL)
 336                         return -ENOMEM;
 337
 338                 *tmp = *pos;
 339                 if (tmp->free_str) {
 340                         tmp->val.str = strdup(pos->val.str);
 341                         if (tmp->val.str == NULL) {
 342                                 free(tmp);
 343                                 return -ENOMEM;
 344                         }
 345                 }
 346                 list_add_tail(&tmp->list, dst);
 347         }
 348         return 0;
 349 }
 350
 351 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
 352 {
 353         return copy_config_terms(&dst->config_terms, &src->config_terms);
 354 }
 355
 356 /**
 357  * evsel__clone - create a new evsel copied from @orig
 358  * @orig: original evsel
 359  *
 360  * The assumption is that @orig is not configured nor opened yet.
 361  * So we only care about the attributes that can be set while it's parsed.
 362  */
 363 struct evsel *evsel__clone(struct evsel *orig)
 364 {
 365         struct evsel *evsel;
 366
 367         BUG_ON(orig->core.fd);
 368         BUG_ON(orig->counts);
 369         BUG_ON(orig->priv);
 370         BUG_ON(orig->per_pkg_mask);
 371
 372         /* cannot handle BPF objects for now */
 373         if (orig->bpf_obj)
 374                 return NULL;
 375
 376         evsel = evsel__new(&orig->core.attr);
 377         if (evsel == NULL)
 378                 return NULL;
 379
 380         evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
 381         evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
 382         evsel->core.threads = perf_thread_map__get(orig->core.threads);
 383         evsel->core.nr_members = orig->core.nr_members;
 384         evsel->core.system_wide = orig->core.system_wide;
 385
 386         if (orig->name) {
 387                 evsel->name = strdup(orig->name);
 388                 if (evsel->name == NULL)
 389                         goto out_err;
 390         }
 391         if (orig->group_name) {
 392                 evsel->group_name = strdup(orig->group_name);
 393                 if (evsel->group_name == NULL)
 394                         goto out_err;
 395         }
 396         if (orig->pmu_name) {
 397                 evsel->pmu_name = strdup(orig->pmu_name);
 398                 if (evsel->pmu_name == NULL)
 399                         goto out_err;
 400         }
 401         if (orig->filter) {
 402                 evsel->filter = strdup(orig->filter);
 403                 if (evsel->filter == NULL)
 404                         goto out_err;
 405         }
 406         if (orig->metric_id) {
 407                 evsel->metric_id = strdup(orig->metric_id);
 408                 if (evsel->metric_id == NULL)
 409                         goto out_err;
 410         }
 411         evsel->cgrp = cgroup__get(orig->cgrp);
 412         evsel->tp_format = orig->tp_format;
 413         evsel->handler = orig->handler;
 414         evsel->core.leader = orig->core.leader;
 415
 416         evsel->max_events = orig->max_events;
 417         evsel->tool_event = orig->tool_event;
 418         free((char *)evsel->unit);
 419         evsel->unit = strdup(orig->unit);
 420         if (evsel->unit == NULL)
 421                 goto out_err;
 422
 423         evsel->scale = orig->scale;
 424         evsel->snapshot = orig->snapshot;
 425         evsel->per_pkg = orig->per_pkg;
 426         evsel->percore = orig->percore;
 427         evsel->precise_max = orig->precise_max;
 428         evsel->use_uncore_alias = orig->use_uncore_alias;
 429         evsel->is_libpfm_event = orig->is_libpfm_event;
 430
 431         evsel->exclude_GH = orig->exclude_GH;
 432         evsel->sample_read = orig->sample_read;
 433         evsel->auto_merge_stats = orig->auto_merge_stats;
 434         evsel->collect_stat = orig->collect_stat;
 435         evsel->weak_group = orig->weak_group;
 436         evsel->use_config_name = orig->use_config_name;
 437
 438         if (evsel__copy_config_terms(evsel, orig) < 0)
 439                 goto out_err;
 440
 441         return evsel;
 442
 443 out_err:
 444         evsel__delete(evsel);
 445         return NULL;
 446 }
 447
 448 /*
 449  * Returns pointer with encoded error via <linux/err.h> interface.
 450  */
 451 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
 452 {
 453         struct evsel *evsel = zalloc(perf_evsel__object.size);
 454         int err = -ENOMEM;
 455
 456         if (evsel == NULL) {
 457                 goto out_err;
 458         } else {
 459                 struct perf_event_attr attr = {
 460                         .type          = PERF_TYPE_TRACEPOINT,
 461                         .sample_type   = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
 462                                           PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
 463                 };
 464
 465                 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
 466                         goto out_free;
 467
 468                 evsel->tp_format = trace_event__tp_format(sys, name);
 469                 if (IS_ERR(evsel->tp_format)) {
 470                         err = PTR_ERR(evsel->tp_format);
 471                         goto out_free;
 472                 }
 473
 474                 event_attr_init(&attr);
 475                 attr.config = evsel->tp_format->id;
 476                 attr.sample_period = 1;
 477                 evsel__init(evsel, &attr, idx);
 478         }
 479
 480         return evsel;
 481
 482 out_free:
 483         zfree(&evsel->name);
 484         free(evsel);
 485 out_err:
 486         return ERR_PTR(err);
 487 }
 488
 489 const char *evsel__hw_names[PERF_COUNT_HW_MAX] = {
 490         "cycles",
 491         "instructions",
 492         "cache-references",
 493         "cache-misses",
 494         "branches",
 495         "branch-misses",
 496         "bus-cycles",
 497         "stalled-cycles-frontend",
 498         "stalled-cycles-backend",
 499         "ref-cycles",
 500 };
 501
 502 char *evsel__bpf_counter_events;
 503
 504 bool evsel__match_bpf_counter_events(const char *name)
 505 {
 506         int name_len;
 507         bool match;
 508         char *ptr;
 509
 510         if (!evsel__bpf_counter_events)
 511                 return false;
 512
 513         ptr = strstr(evsel__bpf_counter_events, name);
 514         name_len = strlen(name);
 515
 516         /* check name matches a full token in evsel__bpf_counter_events */
 517         match = (ptr != NULL) &&
 518                 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
 519                 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
 520
 521         return match;
 522 }
 523
 524 static const char *__evsel__hw_name(u64 config)
 525 {
 526         if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
 527                 return evsel__hw_names[config];
 528
 529         return "unknown-hardware";
 530 }
 531
 532 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
 533 {
 534         int colon = 0, r = 0;
 535         struct perf_event_attr *attr = &evsel->core.attr;
 536         bool exclude_guest_default = false;
 537
 538 #define MOD_PRINT(context, mod) do {                                    \
 539                 if (!attr->exclude_##context) {                         \
 540                         if (!colon) colon = ++r;                        \
 541                         r += scnprintf(bf + r, size - r, "%c", mod);    \
 542                 } } while(0)
 543
 544         if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
 545                 MOD_PRINT(kernel, 'k');
 546                 MOD_PRINT(user, 'u');
 547                 MOD_PRINT(hv, 'h');
 548                 exclude_guest_default = true;
 549         }
 550
 551         if (attr->precise_ip) {
 552                 if (!colon)
 553                         colon = ++r;
 554                 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
 555                 exclude_guest_default = true;
 556         }
 557
 558         if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
 559                 MOD_PRINT(host, 'H');
 560                 MOD_PRINT(guest, 'G');
 561         }
 562 #undef MOD_PRINT
 563         if (colon)
 564                 bf[colon - 1] = ':';
 565         return r;
 566 }
 567
 568 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
 569 {
 570         int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
 571         return r + evsel__add_modifiers(evsel, bf + r, size - r);
 572 }
 573
 574 const char *evsel__sw_names[PERF_COUNT_SW_MAX] = {
 575         "cpu-clock",
 576         "task-clock",
 577         "page-faults",
 578         "context-switches",
 579         "cpu-migrations",
 580         "minor-faults",
 581         "major-faults",
 582         "alignment-faults",
 583         "emulation-faults",
 584         "dummy",
 585 };
 586
 587 static const char *__evsel__sw_name(u64 config)
 588 {
 589         if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
 590                 return evsel__sw_names[config];
 591         return "unknown-software";
 592 }
 593
 594 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
 595 {
 596         int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
 597         return r + evsel__add_modifiers(evsel, bf + r, size - r);
 598 }
 599
 600 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
 601 {
 602         int r;
 603
 604         r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
 605
 606         if (type & HW_BREAKPOINT_R)
 607                 r += scnprintf(bf + r, size - r, "r");
 608
 609         if (type & HW_BREAKPOINT_W)
 610                 r += scnprintf(bf + r, size - r, "w");
 611
 612         if (type & HW_BREAKPOINT_X)
 613                 r += scnprintf(bf + r, size - r, "x");
 614
 615         return r;
 616 }
 617
 618 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
 619 {
 620         struct perf_event_attr *attr = &evsel->core.attr;
 621         int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
 622         return r + evsel__add_modifiers(evsel, bf + r, size - r);
 623 }
 624
 625 const char *evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
 626  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
 627  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
 628  { "LLC",       "L2",                                                   },
 629  { "dTLB",      "d-tlb",        "Data-TLB",                             },
 630  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
 631  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
 632  { "node",                                                              },
 633 };
 634
 635 const char *evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
 636  { "load",      "loads",        "read",                                 },
 637  { "store",     "stores",       "write",                                },
 638  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
 639 };
 640
 641 const char *evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
 642  { "refs",      "Reference",    "ops",          "access",               },
 643  { "misses",    "miss",                                                 },
 644 };
 645
 646 #define C(x)            PERF_COUNT_HW_CACHE_##x
 647 #define CACHE_READ      (1 << C(OP_READ))
 648 #define CACHE_WRITE     (1 << C(OP_WRITE))
 649 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 650 #define COP(x)          (1 << x)
 651
 652 /*
 653  * cache operation stat
 654  * L1I : Read and prefetch only
 655  * ITLB and BPU : Read-only
 656  */
 657 static unsigned long evsel__hw_cache_stat[C(MAX)] = {
 658  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 659  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 660  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 661  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 662  [C(ITLB)]      = (CACHE_READ),
 663  [C(BPU)]       = (CACHE_READ),
 664  [C(NODE)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 665 };
 666
 667 bool evsel__is_cache_op_valid(u8 type, u8 op)
 668 {
 669         if (evsel__hw_cache_stat[type] & COP(op))
 670                 return true;    /* valid */
 671         else
 672                 return false;   /* invalid */
 673 }
 674
 675 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
 676 {
 677         if (result) {
 678                 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
 679                                  evsel__hw_cache_op[op][0],
 680                                  evsel__hw_cache_result[result][0]);
 681         }
 682
 683         return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
 684                          evsel__hw_cache_op[op][1]);
 685 }
 686
 687 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
 688 {
 689         u8 op, result, type = (config >>  0) & 0xff;
 690         const char *err = "unknown-ext-hardware-cache-type";
 691
 692         if (type >= PERF_COUNT_HW_CACHE_MAX)
 693                 goto out_err;
 694
 695         op = (config >>  8) & 0xff;
 696         err = "unknown-ext-hardware-cache-op";
 697         if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
 698                 goto out_err;
 699
 700         result = (config >> 16) & 0xff;
 701         err = "unknown-ext-hardware-cache-result";
 702         if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
 703                 goto out_err;
 704
 705         err = "invalid-cache";
 706         if (!evsel__is_cache_op_valid(type, op))
 707                 goto out_err;
 708
 709         return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
 710 out_err:
 711         return scnprintf(bf, size, "%s", err);
 712 }
 713
 714 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
 715 {
 716         int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
 717         return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
 718 }
 719
 720 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
 721 {
 722         int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
 723         return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
 724 }
 725
 726 static int evsel__tool_name(char *bf, size_t size)
 727 {
 728         int ret = scnprintf(bf, size, "duration_time");
 729         return ret;
 730 }
 731
 732 const char *evsel__name(struct evsel *evsel)
 733 {
 734         char bf[128];
 735
 736         if (!evsel)
 737                 goto out_unknown;
 738
 739         if (evsel->name)
 740                 return evsel->name;
 741
 742         switch (evsel->core.attr.type) {
 743         case PERF_TYPE_RAW:
 744                 evsel__raw_name(evsel, bf, sizeof(bf));
 745                 break;
 746
 747         case PERF_TYPE_HARDWARE:
 748                 evsel__hw_name(evsel, bf, sizeof(bf));
 749                 break;
 750
 751         case PERF_TYPE_HW_CACHE:
 752                 evsel__hw_cache_name(evsel, bf, sizeof(bf));
 753                 break;
 754
 755         case PERF_TYPE_SOFTWARE:
 756                 if (evsel->tool_event)
 757                         evsel__tool_name(bf, sizeof(bf));
 758                 else
 759                         evsel__sw_name(evsel, bf, sizeof(bf));
 760                 break;
 761
 762         case PERF_TYPE_TRACEPOINT:
 763                 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
 764                 break;
 765
 766         case PERF_TYPE_BREAKPOINT:
 767                 evsel__bp_name(evsel, bf, sizeof(bf));
 768                 break;
 769
 770         default:
 771                 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
 772                           evsel->core.attr.type);
 773                 break;
 774         }
 775
 776         evsel->name = strdup(bf);
 777
 778         if (evsel->name)
 779                 return evsel->name;
 780 out_unknown:
 781         return "unknown";
 782 }
 783
 784 const char *evsel__metric_id(const struct evsel *evsel)
 785 {
 786         if (evsel->metric_id)
 787                 return evsel->metric_id;
 788
 789         if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && evsel->tool_event)
 790                 return "duration_time";
 791
 792         return "unknown";
 793 }
 794
 795 const char *evsel__group_name(struct evsel *evsel)
 796 {
 797         return evsel->group_name ?: "anon group";
 798 }
 799
 800 /*
 801  * Returns the group details for the specified leader,
 802  * with following rules.
 803  *
 804  *  For record -e '{cycles,instructions}'
 805  *    'anon group { cycles:u, instructions:u }'
 806  *
 807  *  For record -e 'cycles,instructions' and report --group
 808  *    'cycles:u, instructions:u'
 809  */
 810 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
 811 {
 812         int ret = 0;
 813         struct evsel *pos;
 814         const char *group_name = evsel__group_name(evsel);
 815
 816         if (!evsel->forced_leader)
 817                 ret = scnprintf(buf, size, "%s { ", group_name);
 818
 819         ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
 820
 821         for_each_group_member(pos, evsel)
 822                 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
 823
 824         if (!evsel->forced_leader)
 825                 ret += scnprintf(buf + ret, size - ret, " }");
 826
 827         return ret;
 828 }
 829
 830 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
 831                                       struct callchain_param *param)
 832 {
 833         bool function = evsel__is_function_event(evsel);
 834         struct perf_event_attr *attr = &evsel->core.attr;
 835
 836         evsel__set_sample_bit(evsel, CALLCHAIN);
 837
 838         attr->sample_max_stack = param->max_stack;
 839
 840         if (opts->kernel_callchains)
 841                 attr->exclude_callchain_user = 1;
 842         if (opts->user_callchains)
 843                 attr->exclude_callchain_kernel = 1;
 844         if (param->record_mode == CALLCHAIN_LBR) {
 845                 if (!opts->branch_stack) {
 846                         if (attr->exclude_user) {
 847                                 pr_warning("LBR callstack option is only available "
 848                                            "to get user callchain information. "
 849                                            "Falling back to framepointers.\n");
 850                         } else {
 851                                 evsel__set_sample_bit(evsel, BRANCH_STACK);
 852                                 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
 853                                                         PERF_SAMPLE_BRANCH_CALL_STACK |
 854                                                         PERF_SAMPLE_BRANCH_NO_CYCLES |
 855                                                         PERF_SAMPLE_BRANCH_NO_FLAGS |
 856                                                         PERF_SAMPLE_BRANCH_HW_INDEX;
 857                         }
 858                 } else
 859                          pr_warning("Cannot use LBR callstack with branch stack. "
 860                                     "Falling back to framepointers.\n");
 861         }
 862
 863         if (param->record_mode == CALLCHAIN_DWARF) {
 864                 if (!function) {
 865                         evsel__set_sample_bit(evsel, REGS_USER);
 866                         evsel__set_sample_bit(evsel, STACK_USER);
 867                         if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
 868                                 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
 869                                 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
 870                                            "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
 871                                            "so the minimal registers set (IP, SP) is explicitly forced.\n");
 872                         } else {
 873                                 attr->sample_regs_user |= PERF_REGS_MASK;
 874                         }
 875                         attr->sample_stack_user = param->dump_size;
 876                         attr->exclude_callchain_user = 1;
 877                 } else {
 878                         pr_info("Cannot use DWARF unwind for function trace event,"
 879                                 " falling back to framepointers.\n");
 880                 }
 881         }
 882
 883         if (function) {
 884                 pr_info("Disabling user space callchains for function trace event.\n");
 885                 attr->exclude_callchain_user = 1;
 886         }
 887 }
 888
 889 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
 890                              struct callchain_param *param)
 891 {
 892         if (param->enabled)
 893                 return __evsel__config_callchain(evsel, opts, param);
 894 }
 895
 896 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
 897 {
 898         struct perf_event_attr *attr = &evsel->core.attr;
 899
 900         evsel__reset_sample_bit(evsel, CALLCHAIN);
 901         if (param->record_mode == CALLCHAIN_LBR) {
 902                 evsel__reset_sample_bit(evsel, BRANCH_STACK);
 903                 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
 904                                               PERF_SAMPLE_BRANCH_CALL_STACK |
 905                                               PERF_SAMPLE_BRANCH_HW_INDEX);
 906         }
 907         if (param->record_mode == CALLCHAIN_DWARF) {
 908                 evsel__reset_sample_bit(evsel, REGS_USER);
 909                 evsel__reset_sample_bit(evsel, STACK_USER);
 910         }
 911 }
 912
 913 static void evsel__apply_config_terms(struct evsel *evsel,
 914                                       struct record_opts *opts, bool track)
 915 {
 916         struct evsel_config_term *term;
 917         struct list_head *config_terms = &evsel->config_terms;
 918         struct perf_event_attr *attr = &evsel->core.attr;
 919         /* callgraph default */
 920         struct callchain_param param = {
 921                 .record_mode = callchain_param.record_mode,
 922         };
 923         u32 dump_size = 0;
 924         int max_stack = 0;
 925         const char *callgraph_buf = NULL;
 926
 927         list_for_each_entry(term, config_terms, list) {
 928                 switch (term->type) {
 929                 case EVSEL__CONFIG_TERM_PERIOD:
 930                         if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
 931                                 attr->sample_period = term->val.period;
 932                                 attr->freq = 0;
 933                                 evsel__reset_sample_bit(evsel, PERIOD);
 934                         }
 935                         break;
 936                 case EVSEL__CONFIG_TERM_FREQ:
 937                         if (!(term->weak && opts->user_freq != UINT_MAX)) {
 938                                 attr->sample_freq = term->val.freq;
 939                                 attr->freq = 1;
 940                                 evsel__set_sample_bit(evsel, PERIOD);
 941                         }
 942                         break;
 943                 case EVSEL__CONFIG_TERM_TIME:
 944                         if (term->val.time)
 945                                 evsel__set_sample_bit(evsel, TIME);
 946                         else
 947                                 evsel__reset_sample_bit(evsel, TIME);
 948                         break;
 949                 case EVSEL__CONFIG_TERM_CALLGRAPH:
 950                         callgraph_buf = term->val.str;
 951                         break;
 952                 case EVSEL__CONFIG_TERM_BRANCH:
 953                         if (term->val.str && strcmp(term->val.str, "no")) {
 954                                 evsel__set_sample_bit(evsel, BRANCH_STACK);
 955                                 parse_branch_str(term->val.str,
 956                                                  &attr->branch_sample_type);
 957                         } else
 958                                 evsel__reset_sample_bit(evsel, BRANCH_STACK);
 959                         break;
 960                 case EVSEL__CONFIG_TERM_STACK_USER:
 961                         dump_size = term->val.stack_user;
 962                         break;
 963                 case EVSEL__CONFIG_TERM_MAX_STACK:
 964                         max_stack = term->val.max_stack;
 965                         break;
 966                 case EVSEL__CONFIG_TERM_MAX_EVENTS:
 967                         evsel->max_events = term->val.max_events;
 968                         break;
 969                 case EVSEL__CONFIG_TERM_INHERIT:
 970                         /*
 971                          * attr->inherit should has already been set by
 972                          * evsel__config. If user explicitly set
 973                          * inherit using config terms, override global
 974                          * opt->no_inherit setting.
 975                          */
 976                         attr->inherit = term->val.inherit ? 1 : 0;
 977                         break;
 978                 case EVSEL__CONFIG_TERM_OVERWRITE:
 979                         attr->write_backward = term->val.overwrite ? 1 : 0;
 980                         break;
 981                 case EVSEL__CONFIG_TERM_DRV_CFG:
 982                         break;
 983                 case EVSEL__CONFIG_TERM_PERCORE:
 984                         break;
 985                 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
 986                         attr->aux_output = term->val.aux_output ? 1 : 0;
 987                         break;
 988                 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
 989                         /* Already applied by auxtrace */
 990                         break;
 991                 case EVSEL__CONFIG_TERM_CFG_CHG:
 992                         break;
 993                 default:
 994                         break;
 995                 }
 996         }
 997
 998         /* User explicitly set per-event callgraph, clear the old setting and reset. */
 999         if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1000                 bool sample_address = false;
1001
1002                 if (max_stack) {
1003                         param.max_stack = max_stack;
1004                         if (callgraph_buf == NULL)
1005                                 callgraph_buf = "fp";
1006                 }
1007
1008                 /* parse callgraph parameters */
1009                 if (callgraph_buf != NULL) {
1010                         if (!strcmp(callgraph_buf, "no")) {
1011                                 param.enabled = false;
1012                                 param.record_mode = CALLCHAIN_NONE;
1013                         } else {
1014                                 param.enabled = true;
1015                                 if (parse_callchain_record(callgraph_buf, &param)) {
1016                                         pr_err("per-event callgraph setting for %s failed. "
1017                                                "Apply callgraph global setting for it\n",
1018                                                evsel->name);
1019                                         return;
1020                                 }
1021                                 if (param.record_mode == CALLCHAIN_DWARF)
1022                                         sample_address = true;
1023                         }
1024                 }
1025                 if (dump_size > 0) {
1026                         dump_size = round_up(dump_size, sizeof(u64));
1027                         param.dump_size = dump_size;
1028                 }
1029
1030                 /* If global callgraph set, clear it */
1031                 if (callchain_param.enabled)
1032                         evsel__reset_callgraph(evsel, &callchain_param);
1033
1034                 /* set perf-event callgraph */
1035                 if (param.enabled) {
1036                         if (sample_address) {
1037                                 evsel__set_sample_bit(evsel, ADDR);
1038                                 evsel__set_sample_bit(evsel, DATA_SRC);
1039                                 evsel->core.attr.mmap_data = track;
1040                         }
1041                         evsel__config_callchain(evsel, opts, &param);
1042                 }
1043         }
1044 }
1045
1046 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1047 {
1048         struct evsel_config_term *term, *found_term = NULL;
1049
1050         list_for_each_entry(term, &evsel->config_terms, list) {
1051                 if (term->type == type)
1052                         found_term = term;
1053         }
1054
1055         return found_term;
1056 }
1057
1058 void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1059 {
1060         evsel__set_sample_bit(evsel, WEIGHT);
1061 }
1062
1063 void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1064 {
1065 }
1066
1067 /*
1068  * The enable_on_exec/disabled value strategy:
1069  *
1070  *  1) For any type of traced program:
1071  *    - all independent events and group leaders are disabled
1072  *    - all group members are enabled
1073  *
1074  *     Group members are ruled by group leaders. They need to
1075  *     be enabled, because the group scheduling relies on that.
1076  *
1077  *  2) For traced programs executed by perf:
1078  *     - all independent events and group leaders have
1079  *       enable_on_exec set
1080  *     - we don't specifically enable or disable any event during
1081  *       the record command
1082  *
1083  *     Independent events and group leaders are initially disabled
1084  *     and get enabled by exec. Group members are ruled by group
1085  *     leaders as stated in 1).
1086  *
1087  *  3) For traced programs attached by perf (pid/tid):
1088  *     - we specifically enable or disable all events during
1089  *       the record command
1090  *
1091  *     When attaching events to already running traced we
1092  *     enable/disable events specifically, as there's no
1093  *     initial traced exec call.
1094  */
1095 void evsel__config(struct evsel *evsel, struct record_opts *opts,
1096                    struct callchain_param *callchain)
1097 {
1098         struct evsel *leader = evsel__leader(evsel);
1099         struct perf_event_attr *attr = &evsel->core.attr;
1100         int track = evsel->tracking;
1101         bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1102
1103         attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1104         attr->inherit       = !opts->no_inherit;
1105         attr->write_backward = opts->overwrite ? 1 : 0;
1106
1107         evsel__set_sample_bit(evsel, IP);
1108         evsel__set_sample_bit(evsel, TID);
1109
1110         if (evsel->sample_read) {
1111                 evsel__set_sample_bit(evsel, READ);
1112
1113                 /*
1114                  * We need ID even in case of single event, because
1115                  * PERF_SAMPLE_READ process ID specific data.
1116                  */
1117                 evsel__set_sample_id(evsel, false);
1118
1119                 /*
1120                  * Apply group format only if we belong to group
1121                  * with more than one members.
1122                  */
1123                 if (leader->core.nr_members > 1) {
1124                         attr->read_format |= PERF_FORMAT_GROUP;
1125                         attr->inherit = 0;
1126                 }
1127         }
1128
1129         /*
1130          * We default some events to have a default interval. But keep
1131          * it a weak assumption overridable by the user.
1132          */
1133         if (!attr->sample_period) {
1134                 if (opts->freq) {
1135                         attr->freq              = 1;
1136                         attr->sample_freq       = opts->freq;
1137                 } else {
1138                         attr->sample_period = opts->default_interval;
1139                 }
1140         }
1141         /*
1142          * If attr->freq was set (here or earlier), ask for period
1143          * to be sampled.
1144          */
1145         if (attr->freq)
1146                 evsel__set_sample_bit(evsel, PERIOD);
1147
1148         if (opts->no_samples)
1149                 attr->sample_freq = 0;
1150
1151         if (opts->inherit_stat) {
1152                 evsel->core.attr.read_format |=
1153                         PERF_FORMAT_TOTAL_TIME_ENABLED |
1154                         PERF_FORMAT_TOTAL_TIME_RUNNING |
1155                         PERF_FORMAT_ID;
1156                 attr->inherit_stat = 1;
1157         }
1158
1159         if (opts->sample_address) {
1160                 evsel__set_sample_bit(evsel, ADDR);
1161                 attr->mmap_data = track;
1162         }
1163
1164         /*
1165          * We don't allow user space callchains for  function trace
1166          * event, due to issues with page faults while tracing page
1167          * fault handler and its overall trickiness nature.
1168          */
1169         if (evsel__is_function_event(evsel))
1170                 evsel->core.attr.exclude_callchain_user = 1;
1171
1172         if (callchain && callchain->enabled && !evsel->no_aux_samples)
1173                 evsel__config_callchain(evsel, opts, callchain);
1174
1175         if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1176             !evsel__is_dummy_event(evsel)) {
1177                 attr->sample_regs_intr = opts->sample_intr_regs;
1178                 evsel__set_sample_bit(evsel, REGS_INTR);
1179         }
1180
1181         if (opts->sample_user_regs && !evsel->no_aux_samples &&
1182             !evsel__is_dummy_event(evsel)) {
1183                 attr->sample_regs_user |= opts->sample_user_regs;
1184                 evsel__set_sample_bit(evsel, REGS_USER);
1185         }
1186
1187         if (target__has_cpu(&opts->target) || opts->sample_cpu)
1188                 evsel__set_sample_bit(evsel, CPU);
1189
1190         /*
1191          * When the user explicitly disabled time don't force it here.
1192          */
1193         if (opts->sample_time &&
1194             (!perf_missing_features.sample_id_all &&
1195             (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1196              opts->sample_time_set)))
1197                 evsel__set_sample_bit(evsel, TIME);
1198
1199         if (opts->raw_samples && !evsel->no_aux_samples) {
1200                 evsel__set_sample_bit(evsel, TIME);
1201                 evsel__set_sample_bit(evsel, RAW);
1202                 evsel__set_sample_bit(evsel, CPU);
1203         }
1204
1205         if (opts->sample_address)
1206                 evsel__set_sample_bit(evsel, DATA_SRC);
1207
1208         if (opts->sample_phys_addr)
1209                 evsel__set_sample_bit(evsel, PHYS_ADDR);
1210
1211         if (opts->no_buffering) {
1212                 attr->watermark = 0;
1213                 attr->wakeup_events = 1;
1214         }
1215         if (opts->branch_stack && !evsel->no_aux_samples) {
1216                 evsel__set_sample_bit(evsel, BRANCH_STACK);
1217                 attr->branch_sample_type = opts->branch_stack;
1218         }
1219
1220         if (opts->sample_weight)
1221                 arch_evsel__set_sample_weight(evsel);
1222
1223         attr->task     = track;
1224         attr->mmap     = track;
1225         attr->mmap2    = track && !perf_missing_features.mmap2;
1226         attr->comm     = track;
1227         attr->build_id = track && opts->build_id;
1228
1229         /*
1230          * ksymbol is tracked separately with text poke because it needs to be
1231          * system wide and enabled immediately.
1232          */
1233         if (!opts->text_poke)
1234                 attr->ksymbol = track && !perf_missing_features.ksymbol;
1235         attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1236
1237         if (opts->record_namespaces)
1238                 attr->namespaces  = track;
1239
1240         if (opts->record_cgroup) {
1241                 attr->cgroup = track && !perf_missing_features.cgroup;
1242                 evsel__set_sample_bit(evsel, CGROUP);
1243         }
1244
1245         if (opts->sample_data_page_size)
1246                 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1247
1248         if (opts->sample_code_page_size)
1249                 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1250
1251         if (opts->record_switch_events)
1252                 attr->context_switch = track;
1253
1254         if (opts->sample_transaction)
1255                 evsel__set_sample_bit(evsel, TRANSACTION);
1256
1257         if (opts->running_time) {
1258                 evsel->core.attr.read_format |=
1259                         PERF_FORMAT_TOTAL_TIME_ENABLED |
1260                         PERF_FORMAT_TOTAL_TIME_RUNNING;
1261         }
1262
1263         /*
1264          * XXX see the function comment above
1265          *
1266          * Disabling only independent events or group leaders,
1267          * keeping group members enabled.
1268          */
1269         if (evsel__is_group_leader(evsel))
1270                 attr->disabled = 1;
1271
1272         /*
1273          * Setting enable_on_exec for independent events and
1274          * group leaders for traced executed by perf.
1275          */
1276         if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1277             !opts->initial_delay)
1278                 attr->enable_on_exec = 1;
1279
1280         if (evsel->immediate) {
1281                 attr->disabled = 0;
1282                 attr->enable_on_exec = 0;
1283         }
1284
1285         clockid = opts->clockid;
1286         if (opts->use_clockid) {
1287                 attr->use_clockid = 1;
1288                 attr->clockid = opts->clockid;
1289         }
1290
1291         if (evsel->precise_max)
1292                 attr->precise_ip = 3;
1293
1294         if (opts->all_user) {
1295                 attr->exclude_kernel = 1;
1296                 attr->exclude_user   = 0;
1297         }
1298
1299         if (opts->all_kernel) {
1300                 attr->exclude_kernel = 0;
1301                 attr->exclude_user   = 1;
1302         }
1303
1304         if (evsel->core.own_cpus || evsel->unit)
1305                 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1306
1307         /*
1308          * Apply event specific term settings,
1309          * it overloads any global configuration.
1310          */
1311         evsel__apply_config_terms(evsel, opts, track);
1312
1313         evsel->ignore_missing_thread = opts->ignore_missing_thread;
1314
1315         /* The --period option takes the precedence. */
1316         if (opts->period_set) {
1317                 if (opts->period)
1318                         evsel__set_sample_bit(evsel, PERIOD);
1319                 else
1320                         evsel__reset_sample_bit(evsel, PERIOD);
1321         }
1322
1323         /*
1324          * A dummy event never triggers any actual counter and therefore
1325          * cannot be used with branch_stack.
1326          *
1327          * For initial_delay, a dummy event is added implicitly.
1328          * The software event will trigger -EOPNOTSUPP error out,
1329          * if BRANCH_STACK bit is set.
1330          */
1331         if (evsel__is_dummy_event(evsel))
1332                 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1333 }
1334
1335 int evsel__set_filter(struct evsel *evsel, const char *filter)
1336 {
1337         char *new_filter = strdup(filter);
1338
1339         if (new_filter != NULL) {
1340                 free(evsel->filter);
1341                 evsel->filter = new_filter;
1342                 return 0;
1343         }
1344
1345         return -1;
1346 }
1347
1348 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1349 {
1350         char *new_filter;
1351
1352         if (evsel->filter == NULL)
1353                 return evsel__set_filter(evsel, filter);
1354
1355         if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1356                 free(evsel->filter);
1357                 evsel->filter = new_filter;
1358                 return 0;
1359         }
1360
1361         return -1;
1362 }
1363
1364 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1365 {
1366         return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1367 }
1368
1369 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1370 {
1371         return evsel__append_filter(evsel, "%s,%s", filter);
1372 }
1373
1374 /* Caller has to clear disabled after going through all CPUs. */
1375 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1376 {
1377         return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1378 }
1379
1380 int evsel__enable(struct evsel *evsel)
1381 {
1382         int err = perf_evsel__enable(&evsel->core);
1383
1384         if (!err)
1385                 evsel->disabled = false;
1386         return err;
1387 }
1388
1389 /* Caller has to set disabled after going through all CPUs. */
1390 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1391 {
1392         return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1393 }
1394
1395 int evsel__disable(struct evsel *evsel)
1396 {
1397         int err = perf_evsel__disable(&evsel->core);
1398         /*
1399          * We mark it disabled here so that tools that disable a event can
1400          * ignore events after they disable it. I.e. the ring buffer may have
1401          * already a few more events queued up before the kernel got the stop
1402          * request.
1403          */
1404         if (!err)
1405                 evsel->disabled = true;
1406
1407         return err;
1408 }
1409
1410 void free_config_terms(struct list_head *config_terms)
1411 {
1412         struct evsel_config_term *term, *h;
1413
1414         list_for_each_entry_safe(term, h, config_terms, list) {
1415                 list_del_init(&term->list);
1416                 if (term->free_str)
1417                         zfree(&term->val.str);
1418                 free(term);
1419         }
1420 }
1421
1422 static void evsel__free_config_terms(struct evsel *evsel)
1423 {
1424         free_config_terms(&evsel->config_terms);
1425 }
1426
1427 void evsel__exit(struct evsel *evsel)
1428 {
1429         assert(list_empty(&evsel->core.node));
1430         assert(evsel->evlist == NULL);
1431         bpf_counter__destroy(evsel);
1432         evsel__free_counts(evsel);
1433         perf_evsel__free_fd(&evsel->core);
1434         perf_evsel__free_id(&evsel->core);
1435         evsel__free_config_terms(evsel);
1436         cgroup__put(evsel->cgrp);
1437         perf_cpu_map__put(evsel->core.cpus);
1438         perf_cpu_map__put(evsel->core.own_cpus);
1439         perf_thread_map__put(evsel->core.threads);
1440         zfree(&evsel->group_name);
1441         zfree(&evsel->name);
1442         zfree(&evsel->pmu_name);
1443         zfree(&evsel->unit);
1444         zfree(&evsel->metric_id);
1445         evsel__zero_per_pkg(evsel);
1446         hashmap__free(evsel->per_pkg_mask);
1447         evsel->per_pkg_mask = NULL;
1448         zfree(&evsel->metric_events);
1449         perf_evsel__object.fini(evsel);
1450 }
1451
1452 void evsel__delete(struct evsel *evsel)
1453 {
1454         evsel__exit(evsel);
1455         free(evsel);
1456 }
1457
1458 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1459                            struct perf_counts_values *count)
1460 {
1461         struct perf_counts_values tmp;
1462
1463         if (!evsel->prev_raw_counts)
1464                 return;
1465
1466         if (cpu_map_idx == -1) {
1467                 tmp = evsel->prev_raw_counts->aggr;
1468                 evsel->prev_raw_counts->aggr = *count;
1469         } else {
1470                 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1471                 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1472         }
1473
1474         count->val = count->val - tmp.val;
1475         count->ena = count->ena - tmp.ena;
1476         count->run = count->run - tmp.run;
1477 }
1478
1479 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1480 {
1481         struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1482
1483         return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1484 }
1485
1486 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1487                              u64 val, u64 ena, u64 run)
1488 {
1489         struct perf_counts_values *count;
1490
1491         count = perf_counts(counter->counts, cpu_map_idx, thread);
1492
1493         count->val    = val;
1494         count->ena    = ena;
1495         count->run    = run;
1496
1497         perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1498 }
1499
1500 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1501 {
1502         u64 read_format = leader->core.attr.read_format;
1503         struct sample_read_value *v;
1504         u64 nr, ena = 0, run = 0, i;
1505
1506         nr = *data++;
1507
1508         if (nr != (u64) leader->core.nr_members)
1509                 return -EINVAL;
1510
1511         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1512                 ena = *data++;
1513
1514         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1515                 run = *data++;
1516
1517         v = (struct sample_read_value *) data;
1518
1519         evsel__set_count(leader, cpu_map_idx, thread, v[0].value, ena, run);
1520
1521         for (i = 1; i < nr; i++) {
1522                 struct evsel *counter;
1523
1524                 counter = evlist__id2evsel(leader->evlist, v[i].id);
1525                 if (!counter)
1526                         return -EINVAL;
1527
1528                 evsel__set_count(counter, cpu_map_idx, thread, v[i].value, ena, run);
1529         }
1530
1531         return 0;
1532 }
1533
1534 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1535 {
1536         struct perf_stat_evsel *ps = leader->stats;
1537         u64 read_format = leader->core.attr.read_format;
1538         int size = perf_evsel__read_size(&leader->core);
1539         u64 *data = ps->group_data;
1540
1541         if (!(read_format & PERF_FORMAT_ID))
1542                 return -EINVAL;
1543
1544         if (!evsel__is_group_leader(leader))
1545                 return -EINVAL;
1546
1547         if (!data) {
1548                 data = zalloc(size);
1549                 if (!data)
1550                         return -ENOMEM;
1551
1552                 ps->group_data = data;
1553         }
1554
1555         if (FD(leader, cpu_map_idx, thread) < 0)
1556                 return -EINVAL;
1557
1558         if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1559                 return -errno;
1560
1561         return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1562 }
1563
1564 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1565 {
1566         u64 read_format = evsel->core.attr.read_format;
1567
1568         if (read_format & PERF_FORMAT_GROUP)
1569                 return evsel__read_group(evsel, cpu_map_idx, thread);
1570
1571         return evsel__read_one(evsel, cpu_map_idx, thread);
1572 }
1573
1574 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1575 {
1576         struct perf_counts_values count;
1577         size_t nv = scale ? 3 : 1;
1578
1579         if (FD(evsel, cpu_map_idx, thread) < 0)
1580                 return -EINVAL;
1581
1582         if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1583                 return -ENOMEM;
1584
1585         if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1586                 return -errno;
1587
1588         evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1589         perf_counts_values__scale(&count, scale, NULL);
1590         *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1591         return 0;
1592 }
1593
1594 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1595                                   int cpu_map_idx)
1596 {
1597         struct perf_cpu cpu;
1598
1599         cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1600         return perf_cpu_map__idx(other->core.cpus, cpu);
1601 }
1602
1603 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1604 {
1605         struct evsel *leader = evsel__leader(evsel);
1606
1607         if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1608             (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1609                 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1610         }
1611
1612         return cpu_map_idx;
1613 }
1614
1615 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1616 {
1617         struct evsel *leader = evsel__leader(evsel);
1618         int fd;
1619
1620         if (evsel__is_group_leader(evsel))
1621                 return -1;
1622
1623         /*
1624          * Leader must be already processed/open,
1625          * if not it's a bug.
1626          */
1627         BUG_ON(!leader->core.fd);
1628
1629         cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1630         if (cpu_map_idx == -1)
1631                 return -1;
1632
1633         fd = FD(leader, cpu_map_idx, thread);
1634         BUG_ON(fd == -1);
1635
1636         return fd;
1637 }
1638
1639 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1640 {
1641         for (int cpu = 0; cpu < nr_cpus; cpu++)
1642                 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1643                         FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1644 }
1645
1646 static int update_fds(struct evsel *evsel,
1647                       int nr_cpus, int cpu_map_idx,
1648                       int nr_threads, int thread_idx)
1649 {
1650         struct evsel *pos;
1651
1652         if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1653                 return -EINVAL;
1654
1655         evlist__for_each_entry(evsel->evlist, pos) {
1656                 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1657
1658                 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1659
1660                 /*
1661                  * Since fds for next evsel has not been created,
1662                  * there is no need to iterate whole event list.
1663                  */
1664                 if (pos == evsel)
1665                         break;
1666         }
1667         return 0;
1668 }
1669
1670 static bool evsel__ignore_missing_thread(struct evsel *evsel,
1671                                          int nr_cpus, int cpu_map_idx,
1672                                          struct perf_thread_map *threads,
1673                                          int thread, int err)
1674 {
1675         pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1676
1677         if (!evsel->ignore_missing_thread)
1678                 return false;
1679
1680         /* The system wide setup does not work with threads. */
1681         if (evsel->core.system_wide)
1682                 return false;
1683
1684         /* The -ESRCH is perf event syscall errno for pid's not found. */
1685         if (err != -ESRCH)
1686                 return false;
1687
1688         /* If there's only one thread, let it fail. */
1689         if (threads->nr == 1)
1690                 return false;
1691
1692         /*
1693          * We should remove fd for missing_thread first
1694          * because thread_map__remove() will decrease threads->nr.
1695          */
1696         if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1697                 return false;
1698
1699         if (thread_map__remove(threads, thread))
1700                 return false;
1701
1702         pr_warning("WARNING: Ignored open failure for pid %d\n",
1703                    ignore_pid);
1704         return true;
1705 }
1706
1707 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1708                                 void *priv __maybe_unused)
1709 {
1710         return fprintf(fp, "  %-32s %s\n", name, val);
1711 }
1712
1713 static void display_attr(struct perf_event_attr *attr)
1714 {
1715         if (verbose >= 2 || debug_peo_args) {
1716                 fprintf(stderr, "%.60s\n", graph_dotted_line);
1717                 fprintf(stderr, "perf_event_attr:\n");
1718                 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1719                 fprintf(stderr, "%.60s\n", graph_dotted_line);
1720         }
1721 }
1722
1723 bool evsel__precise_ip_fallback(struct evsel *evsel)
1724 {
1725         /* Do not try less precise if not requested. */
1726         if (!evsel->precise_max)
1727                 return false;
1728
1729         /*
1730          * We tried all the precise_ip values, and it's
1731          * still failing, so leave it to standard fallback.
1732          */
1733         if (!evsel->core.attr.precise_ip) {
1734                 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1735                 return false;
1736         }
1737
1738         if (!evsel->precise_ip_original)
1739                 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1740
1741         evsel->core.attr.precise_ip--;
1742         pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1743         display_attr(&evsel->core.attr);
1744         return true;
1745 }
1746
1747 static struct perf_cpu_map *empty_cpu_map;
1748 static struct perf_thread_map *empty_thread_map;
1749
1750 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1751                 struct perf_thread_map *threads)
1752 {
1753         int nthreads;
1754
1755         if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1756             (perf_missing_features.aux_output     && evsel->core.attr.aux_output))
1757                 return -EINVAL;
1758
1759         if (cpus == NULL) {
1760                 if (empty_cpu_map == NULL) {
1761                         empty_cpu_map = perf_cpu_map__dummy_new();
1762                         if (empty_cpu_map == NULL)
1763                                 return -ENOMEM;
1764                 }
1765
1766                 cpus = empty_cpu_map;
1767         }
1768
1769         if (threads == NULL) {
1770                 if (empty_thread_map == NULL) {
1771                         empty_thread_map = thread_map__new_by_tid(-1);
1772                         if (empty_thread_map == NULL)
1773                                 return -ENOMEM;
1774                 }
1775
1776                 threads = empty_thread_map;
1777         }
1778
1779         if (evsel->core.system_wide)
1780                 nthreads = 1;
1781         else
1782                 nthreads = threads->nr;
1783
1784         if (evsel->core.fd == NULL &&
1785             perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0)
1786                 return -ENOMEM;
1787
1788         evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1789         if (evsel->cgrp)
1790                 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1791
1792         return 0;
1793 }
1794
1795 static void evsel__disable_missing_features(struct evsel *evsel)
1796 {
1797         if (perf_missing_features.weight_struct) {
1798                 evsel__set_sample_bit(evsel, WEIGHT);
1799                 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1800         }
1801         if (perf_missing_features.clockid_wrong)
1802                 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1803         if (perf_missing_features.clockid) {
1804                 evsel->core.attr.use_clockid = 0;
1805                 evsel->core.attr.clockid = 0;
1806         }
1807         if (perf_missing_features.cloexec)
1808                 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1809         if (perf_missing_features.mmap2)
1810                 evsel->core.attr.mmap2 = 0;
1811         if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1812                 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1813         if (perf_missing_features.lbr_flags)
1814                 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1815                                      PERF_SAMPLE_BRANCH_NO_CYCLES);
1816         if (perf_missing_features.group_read && evsel->core.attr.inherit)
1817                 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1818         if (perf_missing_features.ksymbol)
1819                 evsel->core.attr.ksymbol = 0;
1820         if (perf_missing_features.bpf)
1821                 evsel->core.attr.bpf_event = 0;
1822         if (perf_missing_features.branch_hw_idx)
1823                 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1824         if (perf_missing_features.sample_id_all)
1825                 evsel->core.attr.sample_id_all = 0;
1826 }
1827
1828 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1829                         struct perf_thread_map *threads)
1830 {
1831         int err;
1832
1833         err = __evsel__prepare_open(evsel, cpus, threads);
1834         if (err)
1835                 return err;
1836
1837         evsel__disable_missing_features(evsel);
1838
1839         return err;
1840 }
1841
1842 bool evsel__detect_missing_features(struct evsel *evsel)
1843 {
1844         /*
1845          * Must probe features in the order they were added to the
1846          * perf_event_attr interface.
1847          */
1848         if (!perf_missing_features.weight_struct &&
1849             (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1850                 perf_missing_features.weight_struct = true;
1851                 pr_debug2("switching off weight struct support\n");
1852                 return true;
1853         } else if (!perf_missing_features.code_page_size &&
1854             (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1855                 perf_missing_features.code_page_size = true;
1856                 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1857                 return false;
1858         } else if (!perf_missing_features.data_page_size &&
1859             (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1860                 perf_missing_features.data_page_size = true;
1861                 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1862                 return false;
1863         } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1864                 perf_missing_features.cgroup = true;
1865                 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1866                 return false;
1867         } else if (!perf_missing_features.branch_hw_idx &&
1868             (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1869                 perf_missing_features.branch_hw_idx = true;
1870                 pr_debug2("switching off branch HW index support\n");
1871                 return true;
1872         } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1873                 perf_missing_features.aux_output = true;
1874                 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1875                 return false;
1876         } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1877                 perf_missing_features.bpf = true;
1878                 pr_debug2_peo("switching off bpf_event\n");
1879                 return true;
1880         } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1881                 perf_missing_features.ksymbol = true;
1882                 pr_debug2_peo("switching off ksymbol\n");
1883                 return true;
1884         } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1885                 perf_missing_features.write_backward = true;
1886                 pr_debug2_peo("switching off write_backward\n");
1887                 return false;
1888         } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1889                 perf_missing_features.clockid_wrong = true;
1890                 pr_debug2_peo("switching off clockid\n");
1891                 return true;
1892         } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1893                 perf_missing_features.clockid = true;
1894                 pr_debug2_peo("switching off use_clockid\n");
1895                 return true;
1896         } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1897                 perf_missing_features.cloexec = true;
1898                 pr_debug2_peo("switching off cloexec flag\n");
1899                 return true;
1900         } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1901                 perf_missing_features.mmap2 = true;
1902                 pr_debug2_peo("switching off mmap2\n");
1903                 return true;
1904         } else if ((evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) &&
1905                    (evsel->pmu == NULL || evsel->pmu->missing_features.exclude_guest)) {
1906                 if (evsel->pmu == NULL) {
1907                         evsel->pmu = evsel__find_pmu(evsel);
1908                         if (evsel->pmu)
1909                                 evsel->pmu->missing_features.exclude_guest = true;
1910                         else {
1911                                 /* we cannot find PMU, disable attrs now */
1912                                 evsel->core.attr.exclude_host = false;
1913                                 evsel->core.attr.exclude_guest = false;
1914                         }
1915                 }
1916
1917                 if (evsel->exclude_GH) {
1918                         pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1919                         return false;
1920                 }
1921                 if (!perf_missing_features.exclude_guest) {
1922                         perf_missing_features.exclude_guest = true;
1923                         pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1924                 }
1925                 return true;
1926         } else if (!perf_missing_features.sample_id_all) {
1927                 perf_missing_features.sample_id_all = true;
1928                 pr_debug2_peo("switching off sample_id_all\n");
1929                 return true;
1930         } else if (!perf_missing_features.lbr_flags &&
1931                         (evsel->core.attr.branch_sample_type &
1932                          (PERF_SAMPLE_BRANCH_NO_CYCLES |
1933                           PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1934                 perf_missing_features.lbr_flags = true;
1935                 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1936                 return true;
1937         } else if (!perf_missing_features.group_read &&
1938                     evsel->core.attr.inherit &&
1939                    (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1940                    evsel__is_group_leader(evsel)) {
1941                 perf_missing_features.group_read = true;
1942                 pr_debug2_peo("switching off group read\n");
1943                 return true;
1944         } else {
1945                 return false;
1946         }
1947 }
1948
1949 bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
1950 {
1951         int old_errno;
1952         struct rlimit l;
1953
1954         if (*set_rlimit < INCREASED_MAX) {
1955                 old_errno = errno;
1956
1957                 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1958                         if (*set_rlimit == NO_CHANGE) {
1959                                 l.rlim_cur = l.rlim_max;
1960                         } else {
1961                                 l.rlim_cur = l.rlim_max + 1000;
1962                                 l.rlim_max = l.rlim_cur;
1963                         }
1964                         if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1965                                 (*set_rlimit) += 1;
1966                                 errno = old_errno;
1967                                 return true;
1968                         }
1969                 }
1970                 errno = old_errno;
1971         }
1972
1973         return false;
1974 }
1975
1976 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
1977                 struct perf_thread_map *threads,
1978                 int start_cpu_map_idx, int end_cpu_map_idx)
1979 {
1980         int idx, thread, nthreads;
1981         int pid = -1, err, old_errno;
1982         enum rlimit_action set_rlimit = NO_CHANGE;
1983
1984         err = __evsel__prepare_open(evsel, cpus, threads);
1985         if (err)
1986                 return err;
1987
1988         if (cpus == NULL)
1989                 cpus = empty_cpu_map;
1990
1991         if (threads == NULL)
1992                 threads = empty_thread_map;
1993
1994         if (evsel->core.system_wide)
1995                 nthreads = 1;
1996         else
1997                 nthreads = threads->nr;
1998
1999         if (evsel->cgrp)
2000                 pid = evsel->cgrp->fd;
2001
2002 fallback_missing_features:
2003         evsel__disable_missing_features(evsel);
2004
2005         display_attr(&evsel->core.attr);
2006
2007         for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2008
2009                 for (thread = 0; thread < nthreads; thread++) {
2010                         int fd, group_fd;
2011 retry_open:
2012                         if (thread >= nthreads)
2013                                 break;
2014
2015                         if (!evsel->cgrp && !evsel->core.system_wide)
2016                                 pid = perf_thread_map__pid(threads, thread);
2017
2018                         group_fd = get_group_fd(evsel, idx, thread);
2019
2020                         test_attr__ready();
2021
2022                         pr_debug2_peo("sys_perf_event_open: pid %d  cpu %d  group_fd %d  flags %#lx",
2023                                 pid, cpus->map[idx].cpu, group_fd, evsel->open_flags);
2024
2025                         fd = sys_perf_event_open(&evsel->core.attr, pid, cpus->map[idx].cpu,
2026                                                 group_fd, evsel->open_flags);
2027
2028                         FD(evsel, idx, thread) = fd;
2029
2030                         if (fd < 0) {
2031                                 err = -errno;
2032
2033                                 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2034                                           err);
2035                                 goto try_fallback;
2036                         }
2037
2038                         bpf_counter__install_pe(evsel, idx, fd);
2039
2040                         if (unlikely(test_attr__enabled)) {
2041                                 test_attr__open(&evsel->core.attr, pid, cpus->map[idx],
2042                                                 fd, group_fd, evsel->open_flags);
2043                         }
2044
2045                         pr_debug2_peo(" = %d\n", fd);
2046
2047                         if (evsel->bpf_fd >= 0) {
2048                                 int evt_fd = fd;
2049                                 int bpf_fd = evsel->bpf_fd;
2050
2051                                 err = ioctl(evt_fd,
2052                                             PERF_EVENT_IOC_SET_BPF,
2053                                             bpf_fd);
2054                                 if (err && errno != EEXIST) {
2055                                         pr_err("failed to attach bpf fd %d: %s\n",
2056                                                bpf_fd, strerror(errno));
2057                                         err = -EINVAL;
2058                                         goto out_close;
2059                                 }
2060                         }
2061
2062                         set_rlimit = NO_CHANGE;
2063
2064                         /*
2065                          * If we succeeded but had to kill clockid, fail and
2066                          * have evsel__open_strerror() print us a nice error.
2067                          */
2068                         if (perf_missing_features.clockid ||
2069                             perf_missing_features.clockid_wrong) {
2070                                 err = -EINVAL;
2071                                 goto out_close;
2072                         }
2073                 }
2074         }
2075
2076         return 0;
2077
2078 try_fallback:
2079         if (evsel__precise_ip_fallback(evsel))
2080                 goto retry_open;
2081
2082         if (evsel__ignore_missing_thread(evsel, cpus->nr, idx, threads, thread, err)) {
2083                 /* We just removed 1 thread, so lower the upper nthreads limit. */
2084                 nthreads--;
2085
2086                 /* ... and pretend like nothing have happened. */
2087                 err = 0;
2088                 goto retry_open;
2089         }
2090         /*
2091          * perf stat needs between 5 and 22 fds per CPU. When we run out
2092          * of them try to increase the limits.
2093          */
2094         if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2095                 goto retry_open;
2096
2097         if (err != -EINVAL || idx > 0 || thread > 0)
2098                 goto out_close;
2099
2100         if (evsel__detect_missing_features(evsel))
2101                 goto fallback_missing_features;
2102 out_close:
2103         if (err)
2104                 threads->err_thread = thread;
2105
2106         old_errno = errno;
2107         do {
2108                 while (--thread >= 0) {
2109                         if (FD(evsel, idx, thread) >= 0)
2110                                 close(FD(evsel, idx, thread));
2111                         FD(evsel, idx, thread) = -1;
2112                 }
2113                 thread = nthreads;
2114         } while (--idx >= 0);
2115         errno = old_errno;
2116         return err;
2117 }
2118
2119 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2120                 struct perf_thread_map *threads)
2121 {
2122         return evsel__open_cpu(evsel, cpus, threads, 0, cpus ? cpus->nr : 1);
2123 }
2124
2125 void evsel__close(struct evsel *evsel)
2126 {
2127         perf_evsel__close(&evsel->core);
2128         perf_evsel__free_id(&evsel->core);
2129 }
2130
2131 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2132 {
2133         if (cpu_map_idx == -1)
2134                 return evsel__open_cpu(evsel, cpus, NULL, 0,
2135                                         cpus ? cpus->nr : 1);
2136
2137         return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2138 }
2139
2140 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2141 {
2142         return evsel__open(evsel, NULL, threads);
2143 }
2144
2145 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2146                                        const union perf_event *event,
2147                                        struct perf_sample *sample)
2148 {
2149         u64 type = evsel->core.attr.sample_type;
2150         const __u64 *array = event->sample.array;
2151         bool swapped = evsel->needs_swap;
2152         union u64_swap u;
2153
2154         array += ((event->header.size -
2155                    sizeof(event->header)) / sizeof(u64)) - 1;
2156
2157         if (type & PERF_SAMPLE_IDENTIFIER) {
2158                 sample->id = *array;
2159                 array--;
2160         }
2161
2162         if (type & PERF_SAMPLE_CPU) {
2163                 u.val64 = *array;
2164                 if (swapped) {
2165                         /* undo swap of u64, then swap on individual u32s */
2166                         u.val64 = bswap_64(u.val64);
2167                         u.val32[0] = bswap_32(u.val32[0]);
2168                 }
2169
2170                 sample->cpu = u.val32[0];
2171                 array--;
2172         }
2173
2174         if (type & PERF_SAMPLE_STREAM_ID) {
2175                 sample->stream_id = *array;
2176                 array--;
2177         }
2178
2179         if (type & PERF_SAMPLE_ID) {
2180                 sample->id = *array;
2181                 array--;
2182         }
2183
2184         if (type & PERF_SAMPLE_TIME) {
2185                 sample->time = *array;
2186                 array--;
2187         }
2188
2189         if (type & PERF_SAMPLE_TID) {
2190                 u.val64 = *array;
2191                 if (swapped) {
2192                         /* undo swap of u64, then swap on individual u32s */
2193                         u.val64 = bswap_64(u.val64);
2194                         u.val32[0] = bswap_32(u.val32[0]);
2195                         u.val32[1] = bswap_32(u.val32[1]);
2196                 }
2197
2198                 sample->pid = u.val32[0];
2199                 sample->tid = u.val32[1];
2200                 array--;
2201         }
2202
2203         return 0;
2204 }
2205
2206 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2207                             u64 size)
2208 {
2209         return size > max_size || offset + size > endp;
2210 }
2211
2212 #define OVERFLOW_CHECK(offset, size, max_size)                          \
2213         do {                                                            \
2214                 if (overflow(endp, (max_size), (offset), (size)))       \
2215                         return -EFAULT;                                 \
2216         } while (0)
2217
2218 #define OVERFLOW_CHECK_u64(offset) \
2219         OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2220
2221 static int
2222 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2223 {
2224         /*
2225          * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2226          * up to PERF_SAMPLE_PERIOD.  After that overflow() must be used to
2227          * check the format does not go past the end of the event.
2228          */
2229         if (sample_size + sizeof(event->header) > event->header.size)
2230                 return -EFAULT;
2231
2232         return 0;
2233 }
2234
2235 void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2236                                           const __u64 *array,
2237                                           u64 type __maybe_unused)
2238 {
2239         data->weight = *array;
2240 }
2241
2242 u64 evsel__bitfield_swap_branch_flags(u64 value)
2243 {
2244         u64 new_val = 0;
2245
2246         /*
2247          * branch_flags
2248          * union {
2249          *      u64 values;
2250          *      struct {
2251          *              mispred:1       //target mispredicted
2252          *              predicted:1     //target predicted
2253          *              in_tx:1         //in transaction
2254          *              abort:1         //transaction abort
2255          *              cycles:16       //cycle count to last branch
2256          *              type:4          //branch type
2257          *              reserved:40
2258          *      }
2259          * }
2260          *
2261          * Avoid bswap64() the entire branch_flag.value,
2262          * as it has variable bit-field sizes. Instead the
2263          * macro takes the bit-field position/size,
2264          * swaps it based on the host endianness.
2265          *
2266          * tep_is_bigendian() is used here instead of
2267          * bigendian() to avoid python test fails.
2268          */
2269         if (tep_is_bigendian()) {
2270                 new_val = bitfield_swap(value, 0, 1);
2271                 new_val |= bitfield_swap(value, 1, 1);
2272                 new_val |= bitfield_swap(value, 2, 1);
2273                 new_val |= bitfield_swap(value, 3, 1);
2274                 new_val |= bitfield_swap(value, 4, 16);
2275                 new_val |= bitfield_swap(value, 20, 4);
2276                 new_val |= bitfield_swap(value, 24, 40);
2277         } else {
2278                 new_val = bitfield_swap(value, 63, 1);
2279                 new_val |= bitfield_swap(value, 62, 1);
2280                 new_val |= bitfield_swap(value, 61, 1);
2281                 new_val |= bitfield_swap(value, 60, 1);
2282                 new_val |= bitfield_swap(value, 44, 16);
2283                 new_val |= bitfield_swap(value, 40, 4);
2284                 new_val |= bitfield_swap(value, 0, 40);
2285         }
2286
2287         return new_val;
2288 }
2289
2290 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2291                         struct perf_sample *data)
2292 {
2293         u64 type = evsel->core.attr.sample_type;
2294         bool swapped = evsel->needs_swap;
2295         const __u64 *array;
2296         u16 max_size = event->header.size;
2297         const void *endp = (void *)event + max_size;
2298         u64 sz;
2299
2300         /*
2301          * used for cross-endian analysis. See git commit 65014ab3
2302          * for why this goofiness is needed.
2303          */
2304         union u64_swap u;
2305
2306         memset(data, 0, sizeof(*data));
2307         data->cpu = data->pid = data->tid = -1;
2308         data->stream_id = data->id = data->time = -1ULL;
2309         data->period = evsel->core.attr.sample_period;
2310         data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2311         data->misc    = event->header.misc;
2312         data->id = -1ULL;
2313         data->data_src = PERF_MEM_DATA_SRC_NONE;
2314
2315         if (event->header.type != PERF_RECORD_SAMPLE) {
2316                 if (!evsel->core.attr.sample_id_all)
2317                         return 0;
2318                 return perf_evsel__parse_id_sample(evsel, event, data);
2319         }
2320
2321         array = event->sample.array;
2322
2323         if (perf_event__check_size(event, evsel->sample_size))
2324                 return -EFAULT;
2325
2326         if (type & PERF_SAMPLE_IDENTIFIER) {
2327                 data->id = *array;
2328                 array++;
2329         }
2330
2331         if (type & PERF_SAMPLE_IP) {
2332                 data->ip = *array;
2333                 array++;
2334         }
2335
2336         if (type & PERF_SAMPLE_TID) {
2337                 u.val64 = *array;
2338                 if (swapped) {
2339                         /* undo swap of u64, then swap on individual u32s */
2340                         u.val64 = bswap_64(u.val64);
2341                         u.val32[0] = bswap_32(u.val32[0]);
2342                         u.val32[1] = bswap_32(u.val32[1]);
2343                 }
2344
2345                 data->pid = u.val32[0];
2346                 data->tid = u.val32[1];
2347                 array++;
2348         }
2349
2350         if (type & PERF_SAMPLE_TIME) {
2351                 data->time = *array;
2352                 array++;
2353         }
2354
2355         if (type & PERF_SAMPLE_ADDR) {
2356                 data->addr = *array;
2357                 array++;
2358         }
2359
2360         if (type & PERF_SAMPLE_ID) {
2361                 data->id = *array;
2362                 array++;
2363         }
2364
2365         if (type & PERF_SAMPLE_STREAM_ID) {
2366                 data->stream_id = *array;
2367                 array++;
2368         }
2369
2370         if (type & PERF_SAMPLE_CPU) {
2371
2372                 u.val64 = *array;
2373                 if (swapped) {
2374                         /* undo swap of u64, then swap on individual u32s */
2375                         u.val64 = bswap_64(u.val64);
2376                         u.val32[0] = bswap_32(u.val32[0]);
2377                 }
2378
2379                 data->cpu = u.val32[0];
2380                 array++;
2381         }
2382
2383         if (type & PERF_SAMPLE_PERIOD) {
2384                 data->period = *array;
2385                 array++;
2386         }
2387
2388         if (type & PERF_SAMPLE_READ) {
2389                 u64 read_format = evsel->core.attr.read_format;
2390
2391                 OVERFLOW_CHECK_u64(array);
2392                 if (read_format & PERF_FORMAT_GROUP)
2393                         data->read.group.nr = *array;
2394                 else
2395                         data->read.one.value = *array;
2396
2397                 array++;
2398
2399                 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2400                         OVERFLOW_CHECK_u64(array);
2401                         data->read.time_enabled = *array;
2402                         array++;
2403                 }
2404
2405                 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2406                         OVERFLOW_CHECK_u64(array);
2407                         data->read.time_running = *array;
2408                         array++;
2409                 }
2410
2411                 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2412                 if (read_format & PERF_FORMAT_GROUP) {
2413                         const u64 max_group_nr = UINT64_MAX /
2414                                         sizeof(struct sample_read_value);
2415
2416                         if (data->read.group.nr > max_group_nr)
2417                                 return -EFAULT;
2418                         sz = data->read.group.nr *
2419                              sizeof(struct sample_read_value);
2420                         OVERFLOW_CHECK(array, sz, max_size);
2421                         data->read.group.values =
2422                                         (struct sample_read_value *)array;
2423                         array = (void *)array + sz;
2424                 } else {
2425                         OVERFLOW_CHECK_u64(array);
2426                         data->read.one.id = *array;
2427                         array++;
2428                 }
2429         }
2430
2431         if (type & PERF_SAMPLE_CALLCHAIN) {
2432                 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2433
2434                 OVERFLOW_CHECK_u64(array);
2435                 data->callchain = (struct ip_callchain *)array++;
2436                 if (data->callchain->nr > max_callchain_nr)
2437                         return -EFAULT;
2438                 sz = data->callchain->nr * sizeof(u64);
2439                 OVERFLOW_CHECK(array, sz, max_size);
2440                 array = (void *)array + sz;
2441         }
2442
2443         if (type & PERF_SAMPLE_RAW) {
2444                 OVERFLOW_CHECK_u64(array);
2445                 u.val64 = *array;
2446
2447                 /*
2448                  * Undo swap of u64, then swap on individual u32s,
2449                  * get the size of the raw area and undo all of the
2450                  * swap. The pevent interface handles endianness by
2451                  * itself.
2452                  */
2453                 if (swapped) {
2454                         u.val64 = bswap_64(u.val64);
2455                         u.val32[0] = bswap_32(u.val32[0]);
2456                         u.val32[1] = bswap_32(u.val32[1]);
2457                 }
2458                 data->raw_size = u.val32[0];
2459
2460                 /*
2461                  * The raw data is aligned on 64bits including the
2462                  * u32 size, so it's safe to use mem_bswap_64.
2463                  */
2464                 if (swapped)
2465                         mem_bswap_64((void *) array, data->raw_size);
2466
2467                 array = (void *)array + sizeof(u32);
2468
2469                 OVERFLOW_CHECK(array, data->raw_size, max_size);
2470                 data->raw_data = (void *)array;
2471                 array = (void *)array + data->raw_size;
2472         }
2473
2474         if (type & PERF_SAMPLE_BRANCH_STACK) {
2475                 const u64 max_branch_nr = UINT64_MAX /
2476                                           sizeof(struct branch_entry);
2477                 struct branch_entry *e;
2478                 unsigned int i;
2479
2480                 OVERFLOW_CHECK_u64(array);
2481                 data->branch_stack = (struct branch_stack *)array++;
2482
2483                 if (data->branch_stack->nr > max_branch_nr)
2484                         return -EFAULT;
2485
2486                 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2487                 if (evsel__has_branch_hw_idx(evsel)) {
2488                         sz += sizeof(u64);
2489                         e = &data->branch_stack->entries[0];
2490                 } else {
2491                         data->no_hw_idx = true;
2492                         /*
2493                          * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2494                          * only nr and entries[] will be output by kernel.
2495                          */
2496                         e = (struct branch_entry *)&data->branch_stack->hw_idx;
2497                 }
2498
2499                 if (swapped) {
2500                         /*
2501                          * struct branch_flag does not have endian
2502                          * specific bit field definition. And bswap
2503                          * will not resolve the issue, since these
2504                          * are bit fields.
2505                          *
2506                          * evsel__bitfield_swap_branch_flags() uses a
2507                          * bitfield_swap macro to swap the bit position
2508                          * based on the host endians.
2509                          */
2510                         for (i = 0; i < data->branch_stack->nr; i++, e++)
2511                                 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2512                 }
2513
2514                 OVERFLOW_CHECK(array, sz, max_size);
2515                 array = (void *)array + sz;
2516         }
2517
2518         if (type & PERF_SAMPLE_REGS_USER) {
2519                 OVERFLOW_CHECK_u64(array);
2520                 data->user_regs.abi = *array;
2521                 array++;
2522
2523                 if (data->user_regs.abi) {
2524                         u64 mask = evsel->core.attr.sample_regs_user;
2525
2526                         sz = hweight64(mask) * sizeof(u64);
2527                         OVERFLOW_CHECK(array, sz, max_size);
2528                         data->user_regs.mask = mask;
2529                         data->user_regs.regs = (u64 *)array;
2530                         array = (void *)array + sz;
2531                 }
2532         }
2533
2534         if (type & PERF_SAMPLE_STACK_USER) {
2535                 OVERFLOW_CHECK_u64(array);
2536                 sz = *array++;
2537
2538                 data->user_stack.offset = ((char *)(array - 1)
2539                                           - (char *) event);
2540
2541                 if (!sz) {
2542                         data->user_stack.size = 0;
2543                 } else {
2544                         OVERFLOW_CHECK(array, sz, max_size);
2545                         data->user_stack.data = (char *)array;
2546                         array = (void *)array + sz;
2547                         OVERFLOW_CHECK_u64(array);
2548                         data->user_stack.size = *array++;
2549                         if (WARN_ONCE(data->user_stack.size > sz,
2550                                       "user stack dump failure\n"))
2551                                 return -EFAULT;
2552                 }
2553         }
2554
2555         if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2556                 OVERFLOW_CHECK_u64(array);
2557                 arch_perf_parse_sample_weight(data, array, type);
2558                 array++;
2559         }
2560
2561         if (type & PERF_SAMPLE_DATA_SRC) {
2562                 OVERFLOW_CHECK_u64(array);
2563                 data->data_src = *array;
2564                 array++;
2565         }
2566
2567         if (type & PERF_SAMPLE_TRANSACTION) {
2568                 OVERFLOW_CHECK_u64(array);
2569                 data->transaction = *array;
2570                 array++;
2571         }
2572
2573         data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2574         if (type & PERF_SAMPLE_REGS_INTR) {
2575                 OVERFLOW_CHECK_u64(array);
2576                 data->intr_regs.abi = *array;
2577                 array++;
2578
2579                 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2580                         u64 mask = evsel->core.attr.sample_regs_intr;
2581
2582                         sz = hweight64(mask) * sizeof(u64);
2583                         OVERFLOW_CHECK(array, sz, max_size);
2584                         data->intr_regs.mask = mask;
2585                         data->intr_regs.regs = (u64 *)array;
2586                         array = (void *)array + sz;
2587                 }
2588         }
2589
2590         data->phys_addr = 0;
2591         if (type & PERF_SAMPLE_PHYS_ADDR) {
2592                 data->phys_addr = *array;
2593                 array++;
2594         }
2595
2596         data->cgroup = 0;
2597         if (type & PERF_SAMPLE_CGROUP) {
2598                 data->cgroup = *array;
2599                 array++;
2600         }
2601
2602         data->data_page_size = 0;
2603         if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2604                 data->data_page_size = *array;
2605                 array++;
2606         }
2607
2608         data->code_page_size = 0;
2609         if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2610                 data->code_page_size = *array;
2611                 array++;
2612         }
2613
2614         if (type & PERF_SAMPLE_AUX) {
2615                 OVERFLOW_CHECK_u64(array);
2616                 sz = *array++;
2617
2618                 OVERFLOW_CHECK(array, sz, max_size);
2619                 /* Undo swap of data */
2620                 if (swapped)
2621                         mem_bswap_64((char *)array, sz);
2622                 data->aux_sample.size = sz;
2623                 data->aux_sample.data = (char *)array;
2624                 array = (void *)array + sz;
2625         }
2626
2627         return 0;
2628 }
2629
2630 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2631                                   u64 *timestamp)
2632 {
2633         u64 type = evsel->core.attr.sample_type;
2634         const __u64 *array;
2635
2636         if (!(type & PERF_SAMPLE_TIME))
2637                 return -1;
2638
2639         if (event->header.type != PERF_RECORD_SAMPLE) {
2640                 struct perf_sample data = {
2641                         .time = -1ULL,
2642                 };
2643
2644                 if (!evsel->core.attr.sample_id_all)
2645                         return -1;
2646                 if (perf_evsel__parse_id_sample(evsel, event, &data))
2647                         return -1;
2648
2649                 *timestamp = data.time;
2650                 return 0;
2651         }
2652
2653         array = event->sample.array;
2654
2655         if (perf_event__check_size(event, evsel->sample_size))
2656                 return -EFAULT;
2657
2658         if (type & PERF_SAMPLE_IDENTIFIER)
2659                 array++;
2660
2661         if (type & PERF_SAMPLE_IP)
2662                 array++;
2663
2664         if (type & PERF_SAMPLE_TID)
2665                 array++;
2666
2667         if (type & PERF_SAMPLE_TIME)
2668                 *timestamp = *array;
2669
2670         return 0;
2671 }
2672
2673 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2674 {
2675         return tep_find_field(evsel->tp_format, name);
2676 }
2677
2678 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2679 {
2680         struct tep_format_field *field = evsel__field(evsel, name);
2681         int offset;
2682
2683         if (!field)
2684                 return NULL;
2685
2686         offset = field->offset;
2687
2688         if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2689                 offset = *(int *)(sample->raw_data + field->offset);
2690                 offset &= 0xffff;
2691                 if (field->flags & TEP_FIELD_IS_RELATIVE)
2692                         offset += field->offset + field->size;
2693         }
2694
2695         return sample->raw_data + offset;
2696 }
2697
2698 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2699                          bool needs_swap)
2700 {
2701         u64 value;
2702         void *ptr = sample->raw_data + field->offset;
2703
2704         switch (field->size) {
2705         case 1:
2706                 return *(u8 *)ptr;
2707         case 2:
2708                 value = *(u16 *)ptr;
2709                 break;
2710         case 4:
2711                 value = *(u32 *)ptr;
2712                 break;
2713         case 8:
2714                 memcpy(&value, ptr, sizeof(u64));
2715                 break;
2716         default:
2717                 return 0;
2718         }
2719
2720         if (!needs_swap)
2721                 return value;
2722
2723         switch (field->size) {
2724         case 2:
2725                 return bswap_16(value);
2726         case 4:
2727                 return bswap_32(value);
2728         case 8:
2729                 return bswap_64(value);
2730         default:
2731                 return 0;
2732         }
2733
2734         return 0;
2735 }
2736
2737 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2738 {
2739         struct tep_format_field *field = evsel__field(evsel, name);
2740
2741         if (!field)
2742                 return 0;
2743
2744         return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2745 }
2746
2747 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2748 {
2749         int paranoid;
2750
2751         if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2752             evsel->core.attr.type   == PERF_TYPE_HARDWARE &&
2753             evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2754                 /*
2755                  * If it's cycles then fall back to hrtimer based
2756                  * cpu-clock-tick sw counter, which is always available even if
2757                  * no PMU support.
2758                  *
2759                  * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2760                  * b0a873e).
2761                  */
2762                 scnprintf(msg, msgsize, "%s",
2763 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2764
2765                 evsel->core.attr.type   = PERF_TYPE_SOFTWARE;
2766                 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2767
2768                 zfree(&evsel->name);
2769                 return true;
2770         } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2771                    (paranoid = perf_event_paranoid()) > 1) {
2772                 const char *name = evsel__name(evsel);
2773                 char *new_name;
2774                 const char *sep = ":";
2775
2776                 /* If event has exclude user then don't exclude kernel. */
2777                 if (evsel->core.attr.exclude_user)
2778                         return false;
2779
2780                 /* Is there already the separator in the name. */
2781                 if (strchr(name, '/') ||
2782                     (strchr(name, ':') && !evsel->is_libpfm_event))
2783                         sep = "";
2784
2785                 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2786                         return false;
2787
2788                 if (evsel->name)
2789                         free(evsel->name);
2790                 evsel->name = new_name;
2791                 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2792                           "to fall back to excluding kernel and hypervisor "
2793                           " samples", paranoid);
2794                 evsel->core.attr.exclude_kernel = 1;
2795                 evsel->core.attr.exclude_hv     = 1;
2796
2797                 return true;
2798         }
2799
2800         return false;
2801 }
2802
2803 static bool find_process(const char *name)
2804 {
2805         size_t len = strlen(name);
2806         DIR *dir;
2807         struct dirent *d;
2808         int ret = -1;
2809
2810         dir = opendir(procfs__mountpoint());
2811         if (!dir)
2812                 return false;
2813
2814         /* Walk through the directory. */
2815         while (ret && (d = readdir(dir)) != NULL) {
2816                 char path[PATH_MAX];
2817                 char *data;
2818                 size_t size;
2819
2820                 if ((d->d_type != DT_DIR) ||
2821                      !strcmp(".", d->d_name) ||
2822                      !strcmp("..", d->d_name))
2823                         continue;
2824
2825                 scnprintf(path, sizeof(path), "%s/%s/comm",
2826                           procfs__mountpoint(), d->d_name);
2827
2828                 if (filename__read_str(path, &data, &size))
2829                         continue;
2830
2831                 ret = strncmp(name, data, len);
2832                 free(data);
2833         }
2834
2835         closedir(dir);
2836         return ret ? false : true;
2837 }
2838
2839 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2840                          int err, char *msg, size_t size)
2841 {
2842         char sbuf[STRERR_BUFSIZE];
2843         int printed = 0, enforced = 0;
2844
2845         switch (err) {
2846         case EPERM:
2847         case EACCES:
2848                 printed += scnprintf(msg + printed, size - printed,
2849                         "Access to performance monitoring and observability operations is limited.\n");
2850
2851                 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2852                         if (enforced) {
2853                                 printed += scnprintf(msg + printed, size - printed,
2854                                         "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2855                                         "monitoring and observability operations. Inspect system audit records for\n"
2856                                         "more perf_event access control information and adjusting the policy.\n");
2857                         }
2858                 }
2859
2860                 if (err == EPERM)
2861                         printed += scnprintf(msg, size,
2862                                 "No permission to enable %s event.\n\n", evsel__name(evsel));
2863
2864                 return scnprintf(msg + printed, size - printed,
2865                  "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2866                  "access to performance monitoring and observability operations for processes\n"
2867                  "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2868                  "More information can be found at 'Perf events and tool security' document:\n"
2869                  "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2870                  "perf_event_paranoid setting is %d:\n"
2871                  "  -1: Allow use of (almost) all events by all users\n"
2872                  "      Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2873                  ">= 0: Disallow raw and ftrace function tracepoint access\n"
2874                  ">= 1: Disallow CPU event access\n"
2875                  ">= 2: Disallow kernel profiling\n"
2876                  "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2877                  "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2878                  perf_event_paranoid());
2879         case ENOENT:
2880                 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2881         case EMFILE:
2882                 return scnprintf(msg, size, "%s",
2883                          "Too many events are opened.\n"
2884                          "Probably the maximum number of open file descriptors has been reached.\n"
2885                          "Hint: Try again after reducing the number of events.\n"
2886                          "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2887         case ENOMEM:
2888                 if (evsel__has_callchain(evsel) &&
2889                     access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2890                         return scnprintf(msg, size,
2891                                          "Not enough memory to setup event with callchain.\n"
2892                                          "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2893                                          "Hint: Current value: %d", sysctl__max_stack());
2894                 break;
2895         case ENODEV:
2896                 if (target->cpu_list)
2897                         return scnprintf(msg, size, "%s",
2898          "No such device - did you specify an out-of-range profile CPU?");
2899                 break;
2900         case EOPNOTSUPP:
2901                 if (evsel->core.attr.aux_output)
2902                         return scnprintf(msg, size,
2903         "%s: PMU Hardware doesn't support 'aux_output' feature",
2904                                          evsel__name(evsel));
2905                 if (evsel->core.attr.sample_period != 0)
2906                         return scnprintf(msg, size,
2907         "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2908                                          evsel__name(evsel));
2909                 if (evsel->core.attr.precise_ip)
2910                         return scnprintf(msg, size, "%s",
2911         "\'precise\' request may not be supported. Try removing 'p' modifier.");
2912 #if defined(__i386__) || defined(__x86_64__)
2913                 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2914                         return scnprintf(msg, size, "%s",
2915         "No hardware sampling interrupt available.\n");
2916 #endif
2917                 break;
2918         case EBUSY:
2919                 if (find_process("oprofiled"))
2920                         return scnprintf(msg, size,
2921         "The PMU counters are busy/taken by another profiler.\n"
2922         "We found oprofile daemon running, please stop it and try again.");
2923                 break;
2924         case EINVAL:
2925                 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
2926                         return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
2927                 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
2928                         return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
2929                 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2930                         return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2931                 if (perf_missing_features.clockid)
2932                         return scnprintf(msg, size, "clockid feature not supported.");
2933                 if (perf_missing_features.clockid_wrong)
2934                         return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2935                 if (perf_missing_features.aux_output)
2936                         return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
2937                 if (!target__has_cpu(target))
2938                         return scnprintf(msg, size,
2939         "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
2940                                         evsel__name(evsel));
2941                 break;
2942         case ENODATA:
2943                 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
2944                                  "Please add an auxiliary event in front of the load latency event.");
2945         default:
2946                 break;
2947         }
2948
2949         return scnprintf(msg, size,
2950         "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2951         "/bin/dmesg | grep -i perf may provide additional information.\n",
2952                          err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
2953 }
2954
2955 struct perf_env *evsel__env(struct evsel *evsel)
2956 {
2957         if (evsel && evsel->evlist)
2958                 return evsel->evlist->env;
2959         return &perf_env;
2960 }
2961
2962 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
2963 {
2964         int cpu_map_idx, thread;
2965
2966         for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
2967                 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
2968                      thread++) {
2969                         int fd = FD(evsel, cpu_map_idx, thread);
2970
2971                         if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
2972                                                    cpu_map_idx, thread, fd) < 0)
2973                                 return -1;
2974                 }
2975         }
2976
2977         return 0;
2978 }
2979
2980 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
2981 {
2982         struct perf_cpu_map *cpus = evsel->core.cpus;
2983         struct perf_thread_map *threads = evsel->core.threads;
2984
2985         if (perf_evsel__alloc_id(&evsel->core, cpus->nr, threads->nr))
2986                 return -ENOMEM;
2987
2988         return store_evsel_ids(evsel, evlist);
2989 }
2990
2991 void evsel__zero_per_pkg(struct evsel *evsel)
2992 {
2993         struct hashmap_entry *cur;
2994         size_t bkt;
2995
2996         if (evsel->per_pkg_mask) {
2997                 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
2998                         free((char *)cur->key);
2999
3000                 hashmap__clear(evsel->per_pkg_mask);
3001         }
3002 }
3003
3004 bool evsel__is_hybrid(struct evsel *evsel)
3005 {
3006         return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3007 }
3008
3009 struct evsel *evsel__leader(struct evsel *evsel)
3010 {
3011         return container_of(evsel->core.leader, struct evsel, core);
3012 }
3013
3014 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3015 {
3016         return evsel->core.leader == &leader->core;
3017 }
3018
3019 bool evsel__is_leader(struct evsel *evsel)
3020 {
3021         return evsel__has_leader(evsel, evsel);
3022 }
3023
3024 void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3025 {
3026         evsel->core.leader = &leader->core;
3027 }
3028
3029 int evsel__source_count(const struct evsel *evsel)
3030 {
3031         struct evsel *pos;
3032         int count = 0;
3033
3034         evlist__for_each_entry(evsel->evlist, pos) {
3035                 if (pos->metric_leader == evsel)
3036                         count++;
3037         }
3038         return count;
3039 }