tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <dirent.h>
   5 #include <errno.h>
   6 #include <sys/ioctl.h>
   7 #include <sys/param.h>
   8 #include "term.h"
   9 #include "../perf.h"
  10 #include "evlist.h"
  11 #include "evsel.h"
  12 #include <subcmd/parse-options.h>
  13 #include "parse-events.h"
  14 #include <subcmd/exec-cmd.h>
  15 #include "string2.h"
  16 #include "strlist.h"
  17 #include "symbol.h"
  18 #include "cache.h"
  19 #include "header.h"
  20 #include "bpf-loader.h"
  21 #include "debug.h"
  22 #include <api/fs/tracing_path.h>
  23 #include "parse-events-bison.h"
  24 #define YY_EXTRA_TYPE int
  25 #include "parse-events-flex.h"
  26 #include "pmu.h"
  27 #include "thread_map.h"
  28 #include "cpumap.h"
  29 #include "probe-file.h"
  30 #include "asm/bug.h"
  31 #include "util/parse-branch-options.h"
  32 #include "metricgroup.h"
  33
  34 #define MAX_NAME_LEN 100
  35
  36 #ifdef PARSER_DEBUG
  37 extern int parse_events_debug;
  38 #endif
  39 int parse_events_parse(void *parse_state, void *scanner);
  40 static int get_config_terms(struct list_head *head_config,
  41                             struct list_head *head_terms __maybe_unused);
  42
  43 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  44 /*
  45  * The variable indicates the number of supported pmu event symbols.
  46  * 0 means not initialized and ready to init
  47  * -1 means failed to init, don't try anymore
  48  * >0 is the number of supported pmu event symbols
  49  */
  50 static int perf_pmu_events_list_num;
  51
  52 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  53         [PERF_COUNT_HW_CPU_CYCLES] = {
  54                 .symbol = "cpu-cycles",
  55                 .alias  = "cycles",
  56         },
  57         [PERF_COUNT_HW_INSTRUCTIONS] = {
  58                 .symbol = "instructions",
  59                 .alias  = "",
  60         },
  61         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  62                 .symbol = "cache-references",
  63                 .alias  = "",
  64         },
  65         [PERF_COUNT_HW_CACHE_MISSES] = {
  66                 .symbol = "cache-misses",
  67                 .alias  = "",
  68         },
  69         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  70                 .symbol = "branch-instructions",
  71                 .alias  = "branches",
  72         },
  73         [PERF_COUNT_HW_BRANCH_MISSES] = {
  74                 .symbol = "branch-misses",
  75                 .alias  = "",
  76         },
  77         [PERF_COUNT_HW_BUS_CYCLES] = {
  78                 .symbol = "bus-cycles",
  79                 .alias  = "",
  80         },
  81         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  82                 .symbol = "stalled-cycles-frontend",
  83                 .alias  = "idle-cycles-frontend",
  84         },
  85         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  86                 .symbol = "stalled-cycles-backend",
  87                 .alias  = "idle-cycles-backend",
  88         },
  89         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  90                 .symbol = "ref-cycles",
  91                 .alias  = "",
  92         },
  93 };
  94
  95 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  96         [PERF_COUNT_SW_CPU_CLOCK] = {
  97                 .symbol = "cpu-clock",
  98                 .alias  = "",
  99         },
 100         [PERF_COUNT_SW_TASK_CLOCK] = {
 101                 .symbol = "task-clock",
 102                 .alias  = "",
 103         },
 104         [PERF_COUNT_SW_PAGE_FAULTS] = {
 105                 .symbol = "page-faults",
 106                 .alias  = "faults",
 107         },
 108         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 109                 .symbol = "context-switches",
 110                 .alias  = "cs",
 111         },
 112         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 113                 .symbol = "cpu-migrations",
 114                 .alias  = "migrations",
 115         },
 116         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 117                 .symbol = "minor-faults",
 118                 .alias  = "",
 119         },
 120         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 121                 .symbol = "major-faults",
 122                 .alias  = "",
 123         },
 124         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 125                 .symbol = "alignment-faults",
 126                 .alias  = "",
 127         },
 128         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 129                 .symbol = "emulation-faults",
 130                 .alias  = "",
 131         },
 132         [PERF_COUNT_SW_DUMMY] = {
 133                 .symbol = "dummy",
 134                 .alias  = "",
 135         },
 136         [PERF_COUNT_SW_BPF_OUTPUT] = {
 137                 .symbol = "bpf-output",
 138                 .alias  = "",
 139         },
 140 };
 141
 142 #define __PERF_EVENT_FIELD(config, name) \
 143         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 144
 145 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 146 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 147 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 148 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 149
 150 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 151         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 152                 if (sys_dirent->d_type == DT_DIR &&             \
 153                     (strcmp(sys_dirent->d_name, ".")) &&        \
 154                     (strcmp(sys_dirent->d_name, "..")))
 155
 156 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 157 {
 158         char evt_path[MAXPATHLEN];
 159         int fd;
 160
 161         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 162                         sys_dir->d_name, evt_dir->d_name);
 163         fd = open(evt_path, O_RDONLY);
 164         if (fd < 0)
 165                 return -EINVAL;
 166         close(fd);
 167
 168         return 0;
 169 }
 170
 171 #define for_each_event(sys_dirent, evt_dir, evt_dirent)         \
 172         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 173                 if (evt_dirent->d_type == DT_DIR &&             \
 174                     (strcmp(evt_dirent->d_name, ".")) &&        \
 175                     (strcmp(evt_dirent->d_name, "..")) &&       \
 176                     (!tp_event_has_id(sys_dirent, evt_dirent)))
 177
 178 #define MAX_EVENT_LENGTH 512
 179
 180
 181 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 182 {
 183         struct tracepoint_path *path = NULL;
 184         DIR *sys_dir, *evt_dir;
 185         struct dirent *sys_dirent, *evt_dirent;
 186         char id_buf[24];
 187         int fd;
 188         u64 id;
 189         char evt_path[MAXPATHLEN];
 190         char dir_path[MAXPATHLEN];
 191
 192         sys_dir = opendir(tracing_events_path);
 193         if (!sys_dir)
 194                 return NULL;
 195
 196         for_each_subsystem(sys_dir, sys_dirent) {
 197
 198                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 199                          sys_dirent->d_name);
 200                 evt_dir = opendir(dir_path);
 201                 if (!evt_dir)
 202                         continue;
 203
 204                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
 205
 206                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 207                                  evt_dirent->d_name);
 208                         fd = open(evt_path, O_RDONLY);
 209                         if (fd < 0)
 210                                 continue;
 211                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 212                                 close(fd);
 213                                 continue;
 214                         }
 215                         close(fd);
 216                         id = atoll(id_buf);
 217                         if (id == config) {
 218                                 closedir(evt_dir);
 219                                 closedir(sys_dir);
 220                                 path = zalloc(sizeof(*path));
 221                                 if (!path)
 222                                         return NULL;
 223                                 path->system = malloc(MAX_EVENT_LENGTH);
 224                                 if (!path->system) {
 225                                         free(path);
 226                                         return NULL;
 227                                 }
 228                                 path->name = malloc(MAX_EVENT_LENGTH);
 229                                 if (!path->name) {
 230                                         zfree(&path->system);
 231                                         free(path);
 232                                         return NULL;
 233                                 }
 234                                 strncpy(path->system, sys_dirent->d_name,
 235                                         MAX_EVENT_LENGTH);
 236                                 strncpy(path->name, evt_dirent->d_name,
 237                                         MAX_EVENT_LENGTH);
 238                                 return path;
 239                         }
 240                 }
 241                 closedir(evt_dir);
 242         }
 243
 244         closedir(sys_dir);
 245         return NULL;
 246 }
 247
 248 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 249 {
 250         struct tracepoint_path *path = zalloc(sizeof(*path));
 251         char *str = strchr(name, ':');
 252
 253         if (path == NULL || str == NULL) {
 254                 free(path);
 255                 return NULL;
 256         }
 257
 258         path->system = strndup(name, str - name);
 259         path->name = strdup(str+1);
 260
 261         if (path->system == NULL || path->name == NULL) {
 262                 zfree(&path->system);
 263                 zfree(&path->name);
 264                 zfree(&path);
 265         }
 266
 267         return path;
 268 }
 269
 270 const char *event_type(int type)
 271 {
 272         switch (type) {
 273         case PERF_TYPE_HARDWARE:
 274                 return "hardware";
 275
 276         case PERF_TYPE_SOFTWARE:
 277                 return "software";
 278
 279         case PERF_TYPE_TRACEPOINT:
 280                 return "tracepoint";
 281
 282         case PERF_TYPE_HW_CACHE:
 283                 return "hardware-cache";
 284
 285         default:
 286                 break;
 287         }
 288
 289         return "unknown";
 290 }
 291
 292 static int parse_events__is_name_term(struct parse_events_term *term)
 293 {
 294         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 295 }
 296
 297 static char *get_config_name(struct list_head *head_terms)
 298 {
 299         struct parse_events_term *term;
 300
 301         if (!head_terms)
 302                 return NULL;
 303
 304         list_for_each_entry(term, head_terms, list)
 305                 if (parse_events__is_name_term(term))
 306                         return term->val.str;
 307
 308         return NULL;
 309 }
 310
 311 static struct perf_evsel *
 312 __add_event(struct list_head *list, int *idx,
 313             struct perf_event_attr *attr,
 314             char *name, struct perf_pmu *pmu,
 315             struct list_head *config_terms, bool auto_merge_stats)
 316 {
 317         struct perf_evsel *evsel;
 318         struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
 319
 320         event_attr_init(attr);
 321
 322         evsel = perf_evsel__new_idx(attr, *idx);
 323         if (!evsel)
 324                 return NULL;
 325
 326         (*idx)++;
 327         evsel->cpus        = cpu_map__get(cpus);
 328         evsel->own_cpus    = cpu_map__get(cpus);
 329         evsel->system_wide = pmu ? pmu->is_uncore : false;
 330         evsel->auto_merge_stats = auto_merge_stats;
 331
 332         if (name)
 333                 evsel->name = strdup(name);
 334
 335         if (config_terms)
 336                 list_splice(config_terms, &evsel->config_terms);
 337
 338         list_add_tail(&evsel->node, list);
 339         return evsel;
 340 }
 341
 342 static int add_event(struct list_head *list, int *idx,
 343                      struct perf_event_attr *attr, char *name,
 344                      struct list_head *config_terms)
 345 {
 346         return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
 347 }
 348
 349 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 350 {
 351         int i, j;
 352         int n, longest = -1;
 353
 354         for (i = 0; i < size; i++) {
 355                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 356                         n = strlen(names[i][j]);
 357                         if (n > longest && !strncasecmp(str, names[i][j], n))
 358                                 longest = n;
 359                 }
 360                 if (longest > 0)
 361                         return i;
 362         }
 363
 364         return -1;
 365 }
 366
 367 typedef int config_term_func_t(struct perf_event_attr *attr,
 368                                struct parse_events_term *term,
 369                                struct parse_events_error *err);
 370 static int config_term_common(struct perf_event_attr *attr,
 371                               struct parse_events_term *term,
 372                               struct parse_events_error *err);
 373 static int config_attr(struct perf_event_attr *attr,
 374                        struct list_head *head,
 375                        struct parse_events_error *err,
 376                        config_term_func_t config_term);
 377
 378 int parse_events_add_cache(struct list_head *list, int *idx,
 379                            char *type, char *op_result1, char *op_result2,
 380                            struct parse_events_error *err,
 381                            struct list_head *head_config)
 382 {
 383         struct perf_event_attr attr;
 384         LIST_HEAD(config_terms);
 385         char name[MAX_NAME_LEN], *config_name;
 386         int cache_type = -1, cache_op = -1, cache_result = -1;
 387         char *op_result[2] = { op_result1, op_result2 };
 388         int i, n;
 389
 390         /*
 391          * No fallback - if we cannot get a clear cache type
 392          * then bail out:
 393          */
 394         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 395                                    PERF_COUNT_HW_CACHE_MAX);
 396         if (cache_type == -1)
 397                 return -EINVAL;
 398
 399         config_name = get_config_name(head_config);
 400         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 401
 402         for (i = 0; (i < 2) && (op_result[i]); i++) {
 403                 char *str = op_result[i];
 404
 405                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 406
 407                 if (cache_op == -1) {
 408                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 409                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 410                         if (cache_op >= 0) {
 411                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 412                                         return -EINVAL;
 413                                 continue;
 414                         }
 415                 }
 416
 417                 if (cache_result == -1) {
 418                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 419                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 420                         if (cache_result >= 0)
 421                                 continue;
 422                 }
 423         }
 424
 425         /*
 426          * Fall back to reads:
 427          */
 428         if (cache_op == -1)
 429                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 430
 431         /*
 432          * Fall back to accesses:
 433          */
 434         if (cache_result == -1)
 435                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 436
 437         memset(&attr, 0, sizeof(attr));
 438         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 439         attr.type = PERF_TYPE_HW_CACHE;
 440
 441         if (head_config) {
 442                 if (config_attr(&attr, head_config, err,
 443                                 config_term_common))
 444                         return -EINVAL;
 445
 446                 if (get_config_terms(head_config, &config_terms))
 447                         return -ENOMEM;
 448         }
 449         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 450 }
 451
 452 static void tracepoint_error(struct parse_events_error *e, int err,
 453                              const char *sys, const char *name)
 454 {
 455         char help[BUFSIZ];
 456
 457         if (!e)
 458                 return;
 459
 460         /*
 461          * We get error directly from syscall errno ( > 0),
 462          * or from encoded pointer's error ( < 0).
 463          */
 464         err = abs(err);
 465
 466         switch (err) {
 467         case EACCES:
 468                 e->str = strdup("can't access trace events");
 469                 break;
 470         case ENOENT:
 471                 e->str = strdup("unknown tracepoint");
 472                 break;
 473         default:
 474                 e->str = strdup("failed to add tracepoint");
 475                 break;
 476         }
 477
 478         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 479         e->help = strdup(help);
 480 }
 481
 482 static int add_tracepoint(struct list_head *list, int *idx,
 483                           const char *sys_name, const char *evt_name,
 484                           struct parse_events_error *err,
 485                           struct list_head *head_config)
 486 {
 487         struct perf_evsel *evsel;
 488
 489         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 490         if (IS_ERR(evsel)) {
 491                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 492                 return PTR_ERR(evsel);
 493         }
 494
 495         if (head_config) {
 496                 LIST_HEAD(config_terms);
 497
 498                 if (get_config_terms(head_config, &config_terms))
 499                         return -ENOMEM;
 500                 list_splice(&config_terms, &evsel->config_terms);
 501         }
 502
 503         list_add_tail(&evsel->node, list);
 504         return 0;
 505 }
 506
 507 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 508                                       const char *sys_name, const char *evt_name,
 509                                       struct parse_events_error *err,
 510                                       struct list_head *head_config)
 511 {
 512         char evt_path[MAXPATHLEN];
 513         struct dirent *evt_ent;
 514         DIR *evt_dir;
 515         int ret = 0, found = 0;
 516
 517         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 518         evt_dir = opendir(evt_path);
 519         if (!evt_dir) {
 520                 tracepoint_error(err, errno, sys_name, evt_name);
 521                 return -1;
 522         }
 523
 524         while (!ret && (evt_ent = readdir(evt_dir))) {
 525                 if (!strcmp(evt_ent->d_name, ".")
 526                     || !strcmp(evt_ent->d_name, "..")
 527                     || !strcmp(evt_ent->d_name, "enable")
 528                     || !strcmp(evt_ent->d_name, "filter"))
 529                         continue;
 530
 531                 if (!strglobmatch(evt_ent->d_name, evt_name))
 532                         continue;
 533
 534                 found++;
 535
 536                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 537                                      err, head_config);
 538         }
 539
 540         if (!found) {
 541                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 542                 ret = -1;
 543         }
 544
 545         closedir(evt_dir);
 546         return ret;
 547 }
 548
 549 static int add_tracepoint_event(struct list_head *list, int *idx,
 550                                 const char *sys_name, const char *evt_name,
 551                                 struct parse_events_error *err,
 552                                 struct list_head *head_config)
 553 {
 554         return strpbrk(evt_name, "*?") ?
 555                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 556                                           err, head_config) :
 557                add_tracepoint(list, idx, sys_name, evt_name,
 558                               err, head_config);
 559 }
 560
 561 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 562                                     const char *sys_name, const char *evt_name,
 563                                     struct parse_events_error *err,
 564                                     struct list_head *head_config)
 565 {
 566         struct dirent *events_ent;
 567         DIR *events_dir;
 568         int ret = 0;
 569
 570         events_dir = opendir(tracing_events_path);
 571         if (!events_dir) {
 572                 tracepoint_error(err, errno, sys_name, evt_name);
 573                 return -1;
 574         }
 575
 576         while (!ret && (events_ent = readdir(events_dir))) {
 577                 if (!strcmp(events_ent->d_name, ".")
 578                     || !strcmp(events_ent->d_name, "..")
 579                     || !strcmp(events_ent->d_name, "enable")
 580                     || !strcmp(events_ent->d_name, "header_event")
 581                     || !strcmp(events_ent->d_name, "header_page"))
 582                         continue;
 583
 584                 if (!strglobmatch(events_ent->d_name, sys_name))
 585                         continue;
 586
 587                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 588                                            evt_name, err, head_config);
 589         }
 590
 591         closedir(events_dir);
 592         return ret;
 593 }
 594
 595 struct __add_bpf_event_param {
 596         struct parse_events_state *parse_state;
 597         struct list_head *list;
 598         struct list_head *head_config;
 599 };
 600
 601 static int add_bpf_event(const char *group, const char *event, int fd,
 602                          void *_param)
 603 {
 604         LIST_HEAD(new_evsels);
 605         struct __add_bpf_event_param *param = _param;
 606         struct parse_events_state *parse_state = param->parse_state;
 607         struct list_head *list = param->list;
 608         struct perf_evsel *pos;
 609         int err;
 610
 611         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 612                  group, event, fd);
 613
 614         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 615                                           event, parse_state->error,
 616                                           param->head_config);
 617         if (err) {
 618                 struct perf_evsel *evsel, *tmp;
 619
 620                 pr_debug("Failed to add BPF event %s:%s\n",
 621                          group, event);
 622                 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
 623                         list_del(&evsel->node);
 624                         perf_evsel__delete(evsel);
 625                 }
 626                 return err;
 627         }
 628         pr_debug("adding %s:%s\n", group, event);
 629
 630         list_for_each_entry(pos, &new_evsels, node) {
 631                 pr_debug("adding %s:%s to %p\n",
 632                          group, event, pos);
 633                 pos->bpf_fd = fd;
 634         }
 635         list_splice(&new_evsels, list);
 636         return 0;
 637 }
 638
 639 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 640                               struct list_head *list,
 641                               struct bpf_object *obj,
 642                               struct list_head *head_config)
 643 {
 644         int err;
 645         char errbuf[BUFSIZ];
 646         struct __add_bpf_event_param param = {parse_state, list, head_config};
 647         static bool registered_unprobe_atexit = false;
 648
 649         if (IS_ERR(obj) || !obj) {
 650                 snprintf(errbuf, sizeof(errbuf),
 651                          "Internal error: load bpf obj with NULL");
 652                 err = -EINVAL;
 653                 goto errout;
 654         }
 655
 656         /*
 657          * Register atexit handler before calling bpf__probe() so
 658          * bpf__probe() don't need to unprobe probe points its already
 659          * created when failure.
 660          */
 661         if (!registered_unprobe_atexit) {
 662                 atexit(bpf__clear);
 663                 registered_unprobe_atexit = true;
 664         }
 665
 666         err = bpf__probe(obj);
 667         if (err) {
 668                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 669                 goto errout;
 670         }
 671
 672         err = bpf__load(obj);
 673         if (err) {
 674                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 675                 goto errout;
 676         }
 677
 678         err = bpf__foreach_event(obj, add_bpf_event, &param);
 679         if (err) {
 680                 snprintf(errbuf, sizeof(errbuf),
 681                          "Attach events in BPF object failed");
 682                 goto errout;
 683         }
 684
 685         return 0;
 686 errout:
 687         parse_state->error->help = strdup("(add -v to see detail)");
 688         parse_state->error->str = strdup(errbuf);
 689         return err;
 690 }
 691
 692 static int
 693 parse_events_config_bpf(struct parse_events_state *parse_state,
 694                         struct bpf_object *obj,
 695                         struct list_head *head_config)
 696 {
 697         struct parse_events_term *term;
 698         int error_pos;
 699
 700         if (!head_config || list_empty(head_config))
 701                 return 0;
 702
 703         list_for_each_entry(term, head_config, list) {
 704                 char errbuf[BUFSIZ];
 705                 int err;
 706
 707                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 708                         snprintf(errbuf, sizeof(errbuf),
 709                                  "Invalid config term for BPF object");
 710                         errbuf[BUFSIZ - 1] = '\0';
 711
 712                         parse_state->error->idx = term->err_term;
 713                         parse_state->error->str = strdup(errbuf);
 714                         return -EINVAL;
 715                 }
 716
 717                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 718                 if (err) {
 719                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 720                                                  &error_pos, err, errbuf,
 721                                                  sizeof(errbuf));
 722                         parse_state->error->help = strdup(
 723 "Hint:\tValid config terms:\n"
 724 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 725 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 726 "\n"
 727 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 728 "     \t(add -v to see detail)");
 729                         parse_state->error->str = strdup(errbuf);
 730                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 731                                 parse_state->error->idx = term->err_val;
 732                         else
 733                                 parse_state->error->idx = term->err_term + error_pos;
 734                         return err;
 735                 }
 736         }
 737         return 0;
 738 }
 739
 740 /*
 741  * Split config terms:
 742  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 743  *  'call-graph=fp' is 'evt config', should be applied to each
 744  *  events in bpf.c.
 745  * 'map:array.value[0]=1' is 'obj config', should be processed
 746  * with parse_events_config_bpf.
 747  *
 748  * Move object config terms from the first list to obj_head_config.
 749  */
 750 static void
 751 split_bpf_config_terms(struct list_head *evt_head_config,
 752                        struct list_head *obj_head_config)
 753 {
 754         struct parse_events_term *term, *temp;
 755
 756         /*
 757          * Currectly, all possible user config term
 758          * belong to bpf object. parse_events__is_hardcoded_term()
 759          * happends to be a good flag.
 760          *
 761          * See parse_events_config_bpf() and
 762          * config_term_tracepoint().
 763          */
 764         list_for_each_entry_safe(term, temp, evt_head_config, list)
 765                 if (!parse_events__is_hardcoded_term(term))
 766                         list_move_tail(&term->list, obj_head_config);
 767 }
 768
 769 int parse_events_load_bpf(struct parse_events_state *parse_state,
 770                           struct list_head *list,
 771                           char *bpf_file_name,
 772                           bool source,
 773                           struct list_head *head_config)
 774 {
 775         int err;
 776         struct bpf_object *obj;
 777         LIST_HEAD(obj_head_config);
 778
 779         if (head_config)
 780                 split_bpf_config_terms(head_config, &obj_head_config);
 781
 782         obj = bpf__prepare_load(bpf_file_name, source);
 783         if (IS_ERR(obj)) {
 784                 char errbuf[BUFSIZ];
 785
 786                 err = PTR_ERR(obj);
 787
 788                 if (err == -ENOTSUP)
 789                         snprintf(errbuf, sizeof(errbuf),
 790                                  "BPF support is not compiled");
 791                 else
 792                         bpf__strerror_prepare_load(bpf_file_name,
 793                                                    source,
 794                                                    -err, errbuf,
 795                                                    sizeof(errbuf));
 796
 797                 parse_state->error->help = strdup("(add -v to see detail)");
 798                 parse_state->error->str = strdup(errbuf);
 799                 return err;
 800         }
 801
 802         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 803         if (err)
 804                 return err;
 805         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 806
 807         /*
 808          * Caller doesn't know anything about obj_head_config,
 809          * so combine them together again before returnning.
 810          */
 811         if (head_config)
 812                 list_splice_tail(&obj_head_config, head_config);
 813         return err;
 814 }
 815
 816 static int
 817 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 818 {
 819         int i;
 820
 821         for (i = 0; i < 3; i++) {
 822                 if (!type || !type[i])
 823                         break;
 824
 825 #define CHECK_SET_TYPE(bit)             \
 826 do {                                    \
 827         if (attr->bp_type & bit)        \
 828                 return -EINVAL;         \
 829         else                            \
 830                 attr->bp_type |= bit;   \
 831 } while (0)
 832
 833                 switch (type[i]) {
 834                 case 'r':
 835                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 836                         break;
 837                 case 'w':
 838                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 839                         break;
 840                 case 'x':
 841                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 842                         break;
 843                 default:
 844                         return -EINVAL;
 845                 }
 846         }
 847
 848 #undef CHECK_SET_TYPE
 849
 850         if (!attr->bp_type) /* Default */
 851                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 852
 853         return 0;
 854 }
 855
 856 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 857                                 void *ptr, char *type, u64 len)
 858 {
 859         struct perf_event_attr attr;
 860
 861         memset(&attr, 0, sizeof(attr));
 862         attr.bp_addr = (unsigned long) ptr;
 863
 864         if (parse_breakpoint_type(type, &attr))
 865                 return -EINVAL;
 866
 867         /* Provide some defaults if len is not specified */
 868         if (!len) {
 869                 if (attr.bp_type == HW_BREAKPOINT_X)
 870                         len = sizeof(long);
 871                 else
 872                         len = HW_BREAKPOINT_LEN_4;
 873         }
 874
 875         attr.bp_len = len;
 876
 877         attr.type = PERF_TYPE_BREAKPOINT;
 878         attr.sample_period = 1;
 879
 880         return add_event(list, idx, &attr, NULL, NULL);
 881 }
 882
 883 static int check_type_val(struct parse_events_term *term,
 884                           struct parse_events_error *err,
 885                           int type)
 886 {
 887         if (type == term->type_val)
 888                 return 0;
 889
 890         if (err) {
 891                 err->idx = term->err_val;
 892                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 893                         err->str = strdup("expected numeric value");
 894                 else
 895                         err->str = strdup("expected string value");
 896         }
 897         return -EINVAL;
 898 }
 899
 900 /*
 901  * Update according to parse-events.l
 902  */
 903 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 904         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 905         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 906         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 907         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 908         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 909         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 910         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 911         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 912         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 913         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 914         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 915         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 916         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 917         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 918         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 919         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 920         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 921 };
 922
 923 static bool config_term_shrinked;
 924
 925 static bool
 926 config_term_avail(int term_type, struct parse_events_error *err)
 927 {
 928         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 929                 err->str = strdup("Invalid term_type");
 930                 return false;
 931         }
 932         if (!config_term_shrinked)
 933                 return true;
 934
 935         switch (term_type) {
 936         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 937         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 938         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 939         case PARSE_EVENTS__TERM_TYPE_NAME:
 940         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 941                 return true;
 942         default:
 943                 if (!err)
 944                         return false;
 945
 946                 /* term_type is validated so indexing is safe */
 947                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 948                              config_term_names[term_type]) < 0)
 949                         err->str = NULL;
 950                 return false;
 951         }
 952 }
 953
 954 void parse_events__shrink_config_terms(void)
 955 {
 956         config_term_shrinked = true;
 957 }
 958
 959 static int config_term_common(struct perf_event_attr *attr,
 960                               struct parse_events_term *term,
 961                               struct parse_events_error *err)
 962 {
 963 #define CHECK_TYPE_VAL(type)                                               \
 964 do {                                                                       \
 965         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 966                 return -EINVAL;                                            \
 967 } while (0)
 968
 969         switch (term->type_term) {
 970         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 971                 CHECK_TYPE_VAL(NUM);
 972                 attr->config = term->val.num;
 973                 break;
 974         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 975                 CHECK_TYPE_VAL(NUM);
 976                 attr->config1 = term->val.num;
 977                 break;
 978         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 979                 CHECK_TYPE_VAL(NUM);
 980                 attr->config2 = term->val.num;
 981                 break;
 982         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 983                 CHECK_TYPE_VAL(NUM);
 984                 break;
 985         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 986                 CHECK_TYPE_VAL(NUM);
 987                 break;
 988         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 989                 CHECK_TYPE_VAL(STR);
 990                 if (strcmp(term->val.str, "no") &&
 991                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
 992                         err->str = strdup("invalid branch sample type");
 993                         err->idx = term->err_val;
 994                         return -EINVAL;
 995                 }
 996                 break;
 997         case PARSE_EVENTS__TERM_TYPE_TIME:
 998                 CHECK_TYPE_VAL(NUM);
 999                 if (term->val.num > 1) {
1000                         err->str = strdup("expected 0 or 1");
1001                         err->idx = term->err_val;
1002                         return -EINVAL;
1003                 }
1004                 break;
1005         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1006                 CHECK_TYPE_VAL(STR);
1007                 break;
1008         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1009                 CHECK_TYPE_VAL(NUM);
1010                 break;
1011         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1012                 CHECK_TYPE_VAL(NUM);
1013                 break;
1014         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1015                 CHECK_TYPE_VAL(NUM);
1016                 break;
1017         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1018                 CHECK_TYPE_VAL(NUM);
1019                 break;
1020         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1021                 CHECK_TYPE_VAL(NUM);
1022                 break;
1023         case PARSE_EVENTS__TERM_TYPE_NAME:
1024                 CHECK_TYPE_VAL(STR);
1025                 break;
1026         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1027                 CHECK_TYPE_VAL(NUM);
1028                 break;
1029         default:
1030                 err->str = strdup("unknown term");
1031                 err->idx = term->err_term;
1032                 err->help = parse_events_formats_error_string(NULL);
1033                 return -EINVAL;
1034         }
1035
1036         /*
1037          * Check term availbility after basic checking so
1038          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1039          *
1040          * If check availbility at the entry of this function,
1041          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1042          * if an invalid config term is provided for legacy events
1043          * (for example, instructions/badterm/...), which is confusing.
1044          */
1045         if (!config_term_avail(term->type_term, err))
1046                 return -EINVAL;
1047         return 0;
1048 #undef CHECK_TYPE_VAL
1049 }
1050
1051 static int config_term_pmu(struct perf_event_attr *attr,
1052                            struct parse_events_term *term,
1053                            struct parse_events_error *err)
1054 {
1055         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1056             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1057                 /*
1058                  * Always succeed for sysfs terms, as we dont know
1059                  * at this point what type they need to have.
1060                  */
1061                 return 0;
1062         else
1063                 return config_term_common(attr, term, err);
1064 }
1065
1066 static int config_term_tracepoint(struct perf_event_attr *attr,
1067                                   struct parse_events_term *term,
1068                                   struct parse_events_error *err)
1069 {
1070         switch (term->type_term) {
1071         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1072         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1073         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1074         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1075         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1076         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1077         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1078                 return config_term_common(attr, term, err);
1079         default:
1080                 if (err) {
1081                         err->idx = term->err_term;
1082                         err->str = strdup("unknown term");
1083                         err->help = strdup("valid terms: call-graph,stack-size\n");
1084                 }
1085                 return -EINVAL;
1086         }
1087
1088         return 0;
1089 }
1090
1091 static int config_attr(struct perf_event_attr *attr,
1092                        struct list_head *head,
1093                        struct parse_events_error *err,
1094                        config_term_func_t config_term)
1095 {
1096         struct parse_events_term *term;
1097
1098         list_for_each_entry(term, head, list)
1099                 if (config_term(attr, term, err))
1100                         return -EINVAL;
1101
1102         return 0;
1103 }
1104
1105 static int get_config_terms(struct list_head *head_config,
1106                             struct list_head *head_terms __maybe_unused)
1107 {
1108 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1109 do {                                                            \
1110         struct perf_evsel_config_term *__t;                     \
1111                                                                 \
1112         __t = zalloc(sizeof(*__t));                             \
1113         if (!__t)                                               \
1114                 return -ENOMEM;                                 \
1115                                                                 \
1116         INIT_LIST_HEAD(&__t->list);                             \
1117         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1118         __t->val.__name = __val;                                \
1119         list_add_tail(&__t->list, head_terms);                  \
1120 } while (0)
1121
1122         struct parse_events_term *term;
1123
1124         list_for_each_entry(term, head_config, list) {
1125                 switch (term->type_term) {
1126                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1127                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1128                         break;
1129                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1130                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1131                         break;
1132                 case PARSE_EVENTS__TERM_TYPE_TIME:
1133                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1134                         break;
1135                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1136                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1137                         break;
1138                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1139                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1140                         break;
1141                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1142                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1143                         break;
1144                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1145                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1146                         break;
1147                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1148                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1149                         break;
1150                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1151                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1152                         break;
1153                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1154                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1155                         break;
1156                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1157                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1158                         break;
1159                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1160                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1161                         break;
1162                 default:
1163                         break;
1164                 }
1165         }
1166 #undef ADD_EVSEL_CONFIG
1167         return 0;
1168 }
1169
1170 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1171                                 const char *sys, const char *event,
1172                                 struct parse_events_error *err,
1173                                 struct list_head *head_config)
1174 {
1175         if (head_config) {
1176                 struct perf_event_attr attr;
1177
1178                 if (config_attr(&attr, head_config, err,
1179                                 config_term_tracepoint))
1180                         return -EINVAL;
1181         }
1182
1183         if (strpbrk(sys, "*?"))
1184                 return add_tracepoint_multi_sys(list, idx, sys, event,
1185                                                 err, head_config);
1186         else
1187                 return add_tracepoint_event(list, idx, sys, event,
1188                                             err, head_config);
1189 }
1190
1191 int parse_events_add_numeric(struct parse_events_state *parse_state,
1192                              struct list_head *list,
1193                              u32 type, u64 config,
1194                              struct list_head *head_config)
1195 {
1196         struct perf_event_attr attr;
1197         LIST_HEAD(config_terms);
1198
1199         memset(&attr, 0, sizeof(attr));
1200         attr.type = type;
1201         attr.config = config;
1202
1203         if (head_config) {
1204                 if (config_attr(&attr, head_config, parse_state->error,
1205                                 config_term_common))
1206                         return -EINVAL;
1207
1208                 if (get_config_terms(head_config, &config_terms))
1209                         return -ENOMEM;
1210         }
1211
1212         return add_event(list, &parse_state->idx, &attr,
1213                          get_config_name(head_config), &config_terms);
1214 }
1215
1216 static int __parse_events_add_pmu(struct parse_events_state *parse_state,
1217                          struct list_head *list, char *name,
1218                          struct list_head *head_config, bool auto_merge_stats)
1219 {
1220         struct perf_event_attr attr;
1221         struct perf_pmu_info info;
1222         struct perf_pmu *pmu;
1223         struct perf_evsel *evsel;
1224         struct parse_events_error *err = parse_state->error;
1225         LIST_HEAD(config_terms);
1226
1227         pmu = perf_pmu__find(name);
1228         if (!pmu) {
1229                 if (asprintf(&err->str,
1230                                 "Cannot find PMU `%s'. Missing kernel support?",
1231                                 name) < 0)
1232                         err->str = NULL;
1233                 return -EINVAL;
1234         }
1235
1236         if (pmu->default_config) {
1237                 memcpy(&attr, pmu->default_config,
1238                        sizeof(struct perf_event_attr));
1239         } else {
1240                 memset(&attr, 0, sizeof(attr));
1241         }
1242
1243         if (!head_config) {
1244                 attr.type = pmu->type;
1245                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1246                 return evsel ? 0 : -ENOMEM;
1247         }
1248
1249         if (perf_pmu__check_alias(pmu, head_config, &info))
1250                 return -EINVAL;
1251
1252         /*
1253          * Configure hardcoded terms first, no need to check
1254          * return value when called with fail == 0 ;)
1255          */
1256         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1257                 return -EINVAL;
1258
1259         if (get_config_terms(head_config, &config_terms))
1260                 return -ENOMEM;
1261
1262         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1263                 return -EINVAL;
1264
1265         evsel = __add_event(list, &parse_state->idx, &attr,
1266                             get_config_name(head_config), pmu,
1267                             &config_terms, auto_merge_stats);
1268         if (evsel) {
1269                 evsel->unit = info.unit;
1270                 evsel->scale = info.scale;
1271                 evsel->per_pkg = info.per_pkg;
1272                 evsel->snapshot = info.snapshot;
1273                 evsel->metric_expr = info.metric_expr;
1274                 evsel->metric_name = info.metric_name;
1275         }
1276
1277         return evsel ? 0 : -ENOMEM;
1278 }
1279
1280 int parse_events_add_pmu(struct parse_events_state *parse_state,
1281                          struct list_head *list, char *name,
1282                          struct list_head *head_config)
1283 {
1284         return __parse_events_add_pmu(parse_state, list, name, head_config, false);
1285 }
1286
1287 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1288                                char *str, struct list_head **listp)
1289 {
1290         struct list_head *head;
1291         struct parse_events_term *term;
1292         struct list_head *list;
1293         struct perf_pmu *pmu = NULL;
1294         int ok = 0;
1295
1296         *listp = NULL;
1297         /* Add it for all PMUs that support the alias */
1298         list = malloc(sizeof(struct list_head));
1299         if (!list)
1300                 return -1;
1301         INIT_LIST_HEAD(list);
1302         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1303                 struct perf_pmu_alias *alias;
1304
1305                 list_for_each_entry(alias, &pmu->aliases, list) {
1306                         if (!strcasecmp(alias->name, str)) {
1307                                 head = malloc(sizeof(struct list_head));
1308                                 if (!head)
1309                                         return -1;
1310                                 INIT_LIST_HEAD(head);
1311                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1312                                                            str, 1, false, &str, NULL) < 0)
1313                                         return -1;
1314                                 list_add_tail(&term->list, head);
1315
1316                                 if (!__parse_events_add_pmu(parse_state, list,
1317                                                             pmu->name, head, true)) {
1318                                         pr_debug("%s -> %s/%s/\n", str,
1319                                                  pmu->name, alias->str);
1320                                         ok++;
1321                                 }
1322
1323                                 parse_events_terms__delete(head);
1324                         }
1325                 }
1326         }
1327         if (!ok)
1328                 return -1;
1329         *listp = list;
1330         return 0;
1331 }
1332
1333 int parse_events__modifier_group(struct list_head *list,
1334                                  char *event_mod)
1335 {
1336         return parse_events__modifier_event(list, event_mod, true);
1337 }
1338
1339 void parse_events__set_leader(char *name, struct list_head *list)
1340 {
1341         struct perf_evsel *leader;
1342
1343         if (list_empty(list)) {
1344                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1345                 return;
1346         }
1347
1348         __perf_evlist__set_leader(list);
1349         leader = list_entry(list->next, struct perf_evsel, node);
1350         leader->group_name = name ? strdup(name) : NULL;
1351 }
1352
1353 /* list_event is assumed to point to malloc'ed memory */
1354 void parse_events_update_lists(struct list_head *list_event,
1355                                struct list_head *list_all)
1356 {
1357         /*
1358          * Called for single event definition. Update the
1359          * 'all event' list, and reinit the 'single event'
1360          * list, for next event definition.
1361          */
1362         list_splice_tail(list_event, list_all);
1363         free(list_event);
1364 }
1365
1366 struct event_modifier {
1367         int eu;
1368         int ek;
1369         int eh;
1370         int eH;
1371         int eG;
1372         int eI;
1373         int precise;
1374         int precise_max;
1375         int exclude_GH;
1376         int sample_read;
1377         int pinned;
1378         int weak;
1379 };
1380
1381 static int get_event_modifier(struct event_modifier *mod, char *str,
1382                                struct perf_evsel *evsel)
1383 {
1384         int eu = evsel ? evsel->attr.exclude_user : 0;
1385         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1386         int eh = evsel ? evsel->attr.exclude_hv : 0;
1387         int eH = evsel ? evsel->attr.exclude_host : 0;
1388         int eG = evsel ? evsel->attr.exclude_guest : 0;
1389         int eI = evsel ? evsel->attr.exclude_idle : 0;
1390         int precise = evsel ? evsel->attr.precise_ip : 0;
1391         int precise_max = 0;
1392         int sample_read = 0;
1393         int pinned = evsel ? evsel->attr.pinned : 0;
1394
1395         int exclude = eu | ek | eh;
1396         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1397         int weak = 0;
1398
1399         memset(mod, 0, sizeof(*mod));
1400
1401         while (*str) {
1402                 if (*str == 'u') {
1403                         if (!exclude)
1404                                 exclude = eu = ek = eh = 1;
1405                         eu = 0;
1406                 } else if (*str == 'k') {
1407                         if (!exclude)
1408                                 exclude = eu = ek = eh = 1;
1409                         ek = 0;
1410                 } else if (*str == 'h') {
1411                         if (!exclude)
1412                                 exclude = eu = ek = eh = 1;
1413                         eh = 0;
1414                 } else if (*str == 'G') {
1415                         if (!exclude_GH)
1416                                 exclude_GH = eG = eH = 1;
1417                         eG = 0;
1418                 } else if (*str == 'H') {
1419                         if (!exclude_GH)
1420                                 exclude_GH = eG = eH = 1;
1421                         eH = 0;
1422                 } else if (*str == 'I') {
1423                         eI = 1;
1424                 } else if (*str == 'p') {
1425                         precise++;
1426                         /* use of precise requires exclude_guest */
1427                         if (!exclude_GH)
1428                                 eG = 1;
1429                 } else if (*str == 'P') {
1430                         precise_max = 1;
1431                 } else if (*str == 'S') {
1432                         sample_read = 1;
1433                 } else if (*str == 'D') {
1434                         pinned = 1;
1435                 } else if (*str == 'W') {
1436                         weak = 1;
1437                 } else
1438                         break;
1439
1440                 ++str;
1441         }
1442
1443         /*
1444          * precise ip:
1445          *
1446          *  0 - SAMPLE_IP can have arbitrary skid
1447          *  1 - SAMPLE_IP must have constant skid
1448          *  2 - SAMPLE_IP requested to have 0 skid
1449          *  3 - SAMPLE_IP must have 0 skid
1450          *
1451          *  See also PERF_RECORD_MISC_EXACT_IP
1452          */
1453         if (precise > 3)
1454                 return -EINVAL;
1455
1456         mod->eu = eu;
1457         mod->ek = ek;
1458         mod->eh = eh;
1459         mod->eH = eH;
1460         mod->eG = eG;
1461         mod->eI = eI;
1462         mod->precise = precise;
1463         mod->precise_max = precise_max;
1464         mod->exclude_GH = exclude_GH;
1465         mod->sample_read = sample_read;
1466         mod->pinned = pinned;
1467         mod->weak = weak;
1468
1469         return 0;
1470 }
1471
1472 /*
1473  * Basic modifier sanity check to validate it contains only one
1474  * instance of any modifier (apart from 'p') present.
1475  */
1476 static int check_modifier(char *str)
1477 {
1478         char *p = str;
1479
1480         /* The sizeof includes 0 byte as well. */
1481         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1482                 return -1;
1483
1484         while (*p) {
1485                 if (*p != 'p' && strchr(p + 1, *p))
1486                         return -1;
1487                 p++;
1488         }
1489
1490         return 0;
1491 }
1492
1493 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1494 {
1495         struct perf_evsel *evsel;
1496         struct event_modifier mod;
1497
1498         if (str == NULL)
1499                 return 0;
1500
1501         if (check_modifier(str))
1502                 return -EINVAL;
1503
1504         if (!add && get_event_modifier(&mod, str, NULL))
1505                 return -EINVAL;
1506
1507         __evlist__for_each_entry(list, evsel) {
1508                 if (add && get_event_modifier(&mod, str, evsel))
1509                         return -EINVAL;
1510
1511                 evsel->attr.exclude_user   = mod.eu;
1512                 evsel->attr.exclude_kernel = mod.ek;
1513                 evsel->attr.exclude_hv     = mod.eh;
1514                 evsel->attr.precise_ip     = mod.precise;
1515                 evsel->attr.exclude_host   = mod.eH;
1516                 evsel->attr.exclude_guest  = mod.eG;
1517                 evsel->attr.exclude_idle   = mod.eI;
1518                 evsel->exclude_GH          = mod.exclude_GH;
1519                 evsel->sample_read         = mod.sample_read;
1520                 evsel->precise_max         = mod.precise_max;
1521                 evsel->weak_group          = mod.weak;
1522
1523                 if (perf_evsel__is_group_leader(evsel))
1524                         evsel->attr.pinned = mod.pinned;
1525         }
1526
1527         return 0;
1528 }
1529
1530 int parse_events_name(struct list_head *list, char *name)
1531 {
1532         struct perf_evsel *evsel;
1533
1534         __evlist__for_each_entry(list, evsel) {
1535                 if (!evsel->name)
1536                         evsel->name = strdup(name);
1537         }
1538
1539         return 0;
1540 }
1541
1542 static int
1543 comp_pmu(const void *p1, const void *p2)
1544 {
1545         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1546         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1547
1548         return strcasecmp(pmu1->symbol, pmu2->symbol);
1549 }
1550
1551 static void perf_pmu__parse_cleanup(void)
1552 {
1553         if (perf_pmu_events_list_num > 0) {
1554                 struct perf_pmu_event_symbol *p;
1555                 int i;
1556
1557                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1558                         p = perf_pmu_events_list + i;
1559                         zfree(&p->symbol);
1560                 }
1561                 zfree(&perf_pmu_events_list);
1562                 perf_pmu_events_list_num = 0;
1563         }
1564 }
1565
1566 #define SET_SYMBOL(str, stype)          \
1567 do {                                    \
1568         p->symbol = str;                \
1569         if (!p->symbol)                 \
1570                 goto err;               \
1571         p->type = stype;                \
1572 } while (0)
1573
1574 /*
1575  * Read the pmu events list from sysfs
1576  * Save it into perf_pmu_events_list
1577  */
1578 static void perf_pmu__parse_init(void)
1579 {
1580
1581         struct perf_pmu *pmu = NULL;
1582         struct perf_pmu_alias *alias;
1583         int len = 0;
1584
1585         pmu = NULL;
1586         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1587                 list_for_each_entry(alias, &pmu->aliases, list) {
1588                         if (strchr(alias->name, '-'))
1589                                 len++;
1590                         len++;
1591                 }
1592         }
1593
1594         if (len == 0) {
1595                 perf_pmu_events_list_num = -1;
1596                 return;
1597         }
1598         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1599         if (!perf_pmu_events_list)
1600                 return;
1601         perf_pmu_events_list_num = len;
1602
1603         len = 0;
1604         pmu = NULL;
1605         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1606                 list_for_each_entry(alias, &pmu->aliases, list) {
1607                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1608                         char *tmp = strchr(alias->name, '-');
1609
1610                         if (tmp != NULL) {
1611                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1612                                                 PMU_EVENT_SYMBOL_PREFIX);
1613                                 p++;
1614                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1615                                 len += 2;
1616                         } else {
1617                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1618                                 len++;
1619                         }
1620                 }
1621         }
1622         qsort(perf_pmu_events_list, len,
1623                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1624
1625         return;
1626 err:
1627         perf_pmu__parse_cleanup();
1628 }
1629
1630 enum perf_pmu_event_symbol_type
1631 perf_pmu__parse_check(const char *name)
1632 {
1633         struct perf_pmu_event_symbol p, *r;
1634
1635         /* scan kernel pmu events from sysfs if needed */
1636         if (perf_pmu_events_list_num == 0)
1637                 perf_pmu__parse_init();
1638         /*
1639          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1640          * cpu-cycles has been handled by hardcode.
1641          * So it must be cpu// events, not kernel pmu event.
1642          */
1643         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1644                 return PMU_EVENT_SYMBOL_ERR;
1645
1646         p.symbol = strdup(name);
1647         r = bsearch(&p, perf_pmu_events_list,
1648                         (size_t) perf_pmu_events_list_num,
1649                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1650         zfree(&p.symbol);
1651         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1652 }
1653
1654 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1655 {
1656         YY_BUFFER_STATE buffer;
1657         void *scanner;
1658         int ret;
1659
1660         ret = parse_events_lex_init_extra(start_token, &scanner);
1661         if (ret)
1662                 return ret;
1663
1664         buffer = parse_events__scan_string(str, scanner);
1665
1666 #ifdef PARSER_DEBUG
1667         parse_events_debug = 1;
1668 #endif
1669         ret = parse_events_parse(parse_state, scanner);
1670
1671         parse_events__flush_buffer(buffer, scanner);
1672         parse_events__delete_buffer(buffer, scanner);
1673         parse_events_lex_destroy(scanner);
1674         return ret;
1675 }
1676
1677 /*
1678  * parse event config string, return a list of event terms.
1679  */
1680 int parse_events_terms(struct list_head *terms, const char *str)
1681 {
1682         struct parse_events_state parse_state = {
1683                 .terms = NULL,
1684         };
1685         int ret;
1686
1687         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1688         if (!ret) {
1689                 list_splice(parse_state.terms, terms);
1690                 zfree(&parse_state.terms);
1691                 return 0;
1692         }
1693
1694         parse_events_terms__delete(parse_state.terms);
1695         return ret;
1696 }
1697
1698 int parse_events(struct perf_evlist *evlist, const char *str,
1699                  struct parse_events_error *err)
1700 {
1701         struct parse_events_state parse_state = {
1702                 .list   = LIST_HEAD_INIT(parse_state.list),
1703                 .idx    = evlist->nr_entries,
1704                 .error  = err,
1705                 .evlist = evlist,
1706         };
1707         int ret;
1708
1709         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1710         perf_pmu__parse_cleanup();
1711         if (!ret) {
1712                 struct perf_evsel *last;
1713
1714                 if (list_empty(&parse_state.list)) {
1715                         WARN_ONCE(true, "WARNING: event parser found nothing");
1716                         return -1;
1717                 }
1718
1719                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1720                 evlist->nr_groups += parse_state.nr_groups;
1721                 last = perf_evlist__last(evlist);
1722                 last->cmdline_group_boundary = true;
1723
1724                 return 0;
1725         }
1726
1727         /*
1728          * There are 2 users - builtin-record and builtin-test objects.
1729          * Both call perf_evlist__delete in case of error, so we dont
1730          * need to bother.
1731          */
1732         return ret;
1733 }
1734
1735 #define MAX_WIDTH 1000
1736 static int get_term_width(void)
1737 {
1738         struct winsize ws;
1739
1740         get_term_dimensions(&ws);
1741         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1742 }
1743
1744 void parse_events_print_error(struct parse_events_error *err,
1745                               const char *event)
1746 {
1747         const char *str = "invalid or unsupported event: ";
1748         char _buf[MAX_WIDTH];
1749         char *buf = (char *) event;
1750         int idx = 0;
1751
1752         if (err->str) {
1753                 /* -2 for extra '' in the final fprintf */
1754                 int width       = get_term_width() - 2;
1755                 int len_event   = strlen(event);
1756                 int len_str, max_len, cut = 0;
1757
1758                 /*
1759                  * Maximum error index indent, we will cut
1760                  * the event string if it's bigger.
1761                  */
1762                 int max_err_idx = 13;
1763
1764                 /*
1765                  * Let's be specific with the message when
1766                  * we have the precise error.
1767                  */
1768                 str     = "event syntax error: ";
1769                 len_str = strlen(str);
1770                 max_len = width - len_str;
1771
1772                 buf = _buf;
1773
1774                 /* We're cutting from the beginning. */
1775                 if (err->idx > max_err_idx)
1776                         cut = err->idx - max_err_idx;
1777
1778                 strncpy(buf, event + cut, max_len);
1779
1780                 /* Mark cut parts with '..' on both sides. */
1781                 if (cut)
1782                         buf[0] = buf[1] = '.';
1783
1784                 if ((len_event - cut) > max_len) {
1785                         buf[max_len - 1] = buf[max_len - 2] = '.';
1786                         buf[max_len] = 0;
1787                 }
1788
1789                 idx = len_str + err->idx - cut;
1790         }
1791
1792         fprintf(stderr, "%s'%s'\n", str, buf);
1793         if (idx) {
1794                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1795                 if (err->help)
1796                         fprintf(stderr, "\n%s\n", err->help);
1797                 zfree(&err->str);
1798                 zfree(&err->help);
1799         }
1800 }
1801
1802 #undef MAX_WIDTH
1803
1804 int parse_events_option(const struct option *opt, const char *str,
1805                         int unset __maybe_unused)
1806 {
1807         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1808         struct parse_events_error err = { .idx = 0, };
1809         int ret = parse_events(evlist, str, &err);
1810
1811         if (ret) {
1812                 parse_events_print_error(&err, str);
1813                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1814         }
1815
1816         return ret;
1817 }
1818
1819 static int
1820 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1821                            int (*func)(struct perf_evsel *evsel,
1822                                        const void *arg),
1823                            const void *arg)
1824 {
1825         struct perf_evsel *last = NULL;
1826         int err;
1827
1828         /*
1829          * Don't return when list_empty, give func a chance to report
1830          * error when it found last == NULL.
1831          *
1832          * So no need to WARN here, let *func do this.
1833          */
1834         if (evlist->nr_entries > 0)
1835                 last = perf_evlist__last(evlist);
1836
1837         do {
1838                 err = (*func)(last, arg);
1839                 if (err)
1840                         return -1;
1841                 if (!last)
1842                         return 0;
1843
1844                 if (last->node.prev == &evlist->entries)
1845                         return 0;
1846                 last = list_entry(last->node.prev, struct perf_evsel, node);
1847         } while (!last->cmdline_group_boundary);
1848
1849         return 0;
1850 }
1851
1852 static int set_filter(struct perf_evsel *evsel, const void *arg)
1853 {
1854         const char *str = arg;
1855         bool found = false;
1856         int nr_addr_filters = 0;
1857         struct perf_pmu *pmu = NULL;
1858
1859         if (evsel == NULL)
1860                 goto err;
1861
1862         if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1863                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1864                         fprintf(stderr,
1865                                 "not enough memory to hold filter string\n");
1866                         return -1;
1867                 }
1868
1869                 return 0;
1870         }
1871
1872         while ((pmu = perf_pmu__scan(pmu)) != NULL)
1873                 if (pmu->type == evsel->attr.type) {
1874                         found = true;
1875                         break;
1876                 }
1877
1878         if (found)
1879                 perf_pmu__scan_file(pmu, "nr_addr_filters",
1880                                     "%d", &nr_addr_filters);
1881
1882         if (!nr_addr_filters)
1883                 goto err;
1884
1885         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1886                 fprintf(stderr,
1887                         "not enough memory to hold filter string\n");
1888                 return -1;
1889         }
1890
1891         return 0;
1892
1893 err:
1894         fprintf(stderr,
1895                 "--filter option should follow a -e tracepoint or HW tracer option\n");
1896
1897         return -1;
1898 }
1899
1900 int parse_filter(const struct option *opt, const char *str,
1901                  int unset __maybe_unused)
1902 {
1903         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1904
1905         return foreach_evsel_in_last_glob(evlist, set_filter,
1906                                           (const void *)str);
1907 }
1908
1909 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1910                                    const void *arg __maybe_unused)
1911 {
1912         char new_filter[64];
1913
1914         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1915                 fprintf(stderr,
1916                         "--exclude-perf option should follow a -e tracepoint option\n");
1917                 return -1;
1918         }
1919
1920         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1921
1922         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1923                 fprintf(stderr,
1924                         "not enough memory to hold filter string\n");
1925                 return -1;
1926         }
1927
1928         return 0;
1929 }
1930
1931 int exclude_perf(const struct option *opt,
1932                  const char *arg __maybe_unused,
1933                  int unset __maybe_unused)
1934 {
1935         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1936
1937         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1938                                           NULL);
1939 }
1940
1941 static const char * const event_type_descriptors[] = {
1942         "Hardware event",
1943         "Software event",
1944         "Tracepoint event",
1945         "Hardware cache event",
1946         "Raw hardware event descriptor",
1947         "Hardware breakpoint",
1948 };
1949
1950 static int cmp_string(const void *a, const void *b)
1951 {
1952         const char * const *as = a;
1953         const char * const *bs = b;
1954
1955         return strcmp(*as, *bs);
1956 }
1957
1958 /*
1959  * Print the events from <debugfs_mount_point>/tracing/events
1960  */
1961
1962 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1963                              bool name_only)
1964 {
1965         DIR *sys_dir, *evt_dir;
1966         struct dirent *sys_dirent, *evt_dirent;
1967         char evt_path[MAXPATHLEN];
1968         char dir_path[MAXPATHLEN];
1969         char **evt_list = NULL;
1970         unsigned int evt_i = 0, evt_num = 0;
1971         bool evt_num_known = false;
1972
1973 restart:
1974         sys_dir = opendir(tracing_events_path);
1975         if (!sys_dir)
1976                 return;
1977
1978         if (evt_num_known) {
1979                 evt_list = zalloc(sizeof(char *) * evt_num);
1980                 if (!evt_list)
1981                         goto out_close_sys_dir;
1982         }
1983
1984         for_each_subsystem(sys_dir, sys_dirent) {
1985                 if (subsys_glob != NULL &&
1986                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1987                         continue;
1988
1989                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1990                          sys_dirent->d_name);
1991                 evt_dir = opendir(dir_path);
1992                 if (!evt_dir)
1993                         continue;
1994
1995                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1996                         if (event_glob != NULL &&
1997                             !strglobmatch(evt_dirent->d_name, event_glob))
1998                                 continue;
1999
2000                         if (!evt_num_known) {
2001                                 evt_num++;
2002                                 continue;
2003                         }
2004
2005                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2006                                  sys_dirent->d_name, evt_dirent->d_name);
2007
2008                         evt_list[evt_i] = strdup(evt_path);
2009                         if (evt_list[evt_i] == NULL)
2010                                 goto out_close_evt_dir;
2011                         evt_i++;
2012                 }
2013                 closedir(evt_dir);
2014         }
2015         closedir(sys_dir);
2016
2017         if (!evt_num_known) {
2018                 evt_num_known = true;
2019                 goto restart;
2020         }
2021         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2022         evt_i = 0;
2023         while (evt_i < evt_num) {
2024                 if (name_only) {
2025                         printf("%s ", evt_list[evt_i++]);
2026                         continue;
2027                 }
2028                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2029                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2030         }
2031         if (evt_num && pager_in_use())
2032                 printf("\n");
2033
2034 out_free:
2035         evt_num = evt_i;
2036         for (evt_i = 0; evt_i < evt_num; evt_i++)
2037                 zfree(&evt_list[evt_i]);
2038         zfree(&evt_list);
2039         return;
2040
2041 out_close_evt_dir:
2042         closedir(evt_dir);
2043 out_close_sys_dir:
2044         closedir(sys_dir);
2045
2046         printf("FATAL: not enough memory to print %s\n",
2047                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2048         if (evt_list)
2049                 goto out_free;
2050 }
2051
2052 /*
2053  * Check whether event is in <debugfs_mount_point>/tracing/events
2054  */
2055
2056 int is_valid_tracepoint(const char *event_string)
2057 {
2058         DIR *sys_dir, *evt_dir;
2059         struct dirent *sys_dirent, *evt_dirent;
2060         char evt_path[MAXPATHLEN];
2061         char dir_path[MAXPATHLEN];
2062
2063         sys_dir = opendir(tracing_events_path);
2064         if (!sys_dir)
2065                 return 0;
2066
2067         for_each_subsystem(sys_dir, sys_dirent) {
2068
2069                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2070                          sys_dirent->d_name);
2071                 evt_dir = opendir(dir_path);
2072                 if (!evt_dir)
2073                         continue;
2074
2075                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2076                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2077                                  sys_dirent->d_name, evt_dirent->d_name);
2078                         if (!strcmp(evt_path, event_string)) {
2079                                 closedir(evt_dir);
2080                                 closedir(sys_dir);
2081                                 return 1;
2082                         }
2083                 }
2084                 closedir(evt_dir);
2085         }
2086         closedir(sys_dir);
2087         return 0;
2088 }
2089
2090 static bool is_event_supported(u8 type, unsigned config)
2091 {
2092         bool ret = true;
2093         int open_return;
2094         struct perf_evsel *evsel;
2095         struct perf_event_attr attr = {
2096                 .type = type,
2097                 .config = config,
2098                 .disabled = 1,
2099         };
2100         struct thread_map *tmap = thread_map__new_by_tid(0);
2101
2102         if (tmap == NULL)
2103                 return false;
2104
2105         evsel = perf_evsel__new(&attr);
2106         if (evsel) {
2107                 open_return = perf_evsel__open(evsel, NULL, tmap);
2108                 ret = open_return >= 0;
2109
2110                 if (open_return == -EACCES) {
2111                         /*
2112                          * This happens if the paranoid value
2113                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2114                          * Re-run with exclude_kernel set; we don't do that
2115                          * by default as some ARM machines do not support it.
2116                          *
2117                          */
2118                         evsel->attr.exclude_kernel = 1;
2119                         ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2120                 }
2121                 perf_evsel__delete(evsel);
2122         }
2123
2124         return ret;
2125 }
2126
2127 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2128                       bool name_only)
2129 {
2130         struct probe_cache *pcache;
2131         struct probe_cache_entry *ent;
2132         struct strlist *bidlist, *sdtlist;
2133         struct strlist_config cfg = {.dont_dupstr = true};
2134         struct str_node *nd, *nd2;
2135         char *buf, *path, *ptr = NULL;
2136         bool show_detail = false;
2137         int ret;
2138
2139         sdtlist = strlist__new(NULL, &cfg);
2140         if (!sdtlist) {
2141                 pr_debug("Failed to allocate new strlist for SDT\n");
2142                 return;
2143         }
2144         bidlist = build_id_cache__list_all(true);
2145         if (!bidlist) {
2146                 pr_debug("Failed to get buildids: %d\n", errno);
2147                 return;
2148         }
2149         strlist__for_each_entry(nd, bidlist) {
2150                 pcache = probe_cache__new(nd->s, NULL);
2151                 if (!pcache)
2152                         continue;
2153                 list_for_each_entry(ent, &pcache->entries, node) {
2154                         if (!ent->sdt)
2155                                 continue;
2156                         if (subsys_glob &&
2157                             !strglobmatch(ent->pev.group, subsys_glob))
2158                                 continue;
2159                         if (event_glob &&
2160                             !strglobmatch(ent->pev.event, event_glob))
2161                                 continue;
2162                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2163                                         ent->pev.event, nd->s);
2164                         if (ret > 0)
2165                                 strlist__add(sdtlist, buf);
2166                 }
2167                 probe_cache__delete(pcache);
2168         }
2169         strlist__delete(bidlist);
2170
2171         strlist__for_each_entry(nd, sdtlist) {
2172                 buf = strchr(nd->s, '@');
2173                 if (buf)
2174                         *(buf++) = '\0';
2175                 if (name_only) {
2176                         printf("%s ", nd->s);
2177                         continue;
2178                 }
2179                 nd2 = strlist__next(nd);
2180                 if (nd2) {
2181                         ptr = strchr(nd2->s, '@');
2182                         if (ptr)
2183                                 *ptr = '\0';
2184                         if (strcmp(nd->s, nd2->s) == 0)
2185                                 show_detail = true;
2186                 }
2187                 if (show_detail) {
2188                         path = build_id_cache__origname(buf);
2189                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2190                         if (ret > 0) {
2191                                 printf("  %-50s [%s]\n", buf, "SDT event");
2192                                 free(buf);
2193                         }
2194                 } else
2195                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2196                 if (nd2) {
2197                         if (strcmp(nd->s, nd2->s) != 0)
2198                                 show_detail = false;
2199                         if (ptr)
2200                                 *ptr = '@';
2201                 }
2202         }
2203         strlist__delete(sdtlist);
2204 }
2205
2206 int print_hwcache_events(const char *event_glob, bool name_only)
2207 {
2208         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2209         char name[64];
2210         char **evt_list = NULL;
2211         bool evt_num_known = false;
2212
2213 restart:
2214         if (evt_num_known) {
2215                 evt_list = zalloc(sizeof(char *) * evt_num);
2216                 if (!evt_list)
2217                         goto out_enomem;
2218         }
2219
2220         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2221                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2222                         /* skip invalid cache type */
2223                         if (!perf_evsel__is_cache_op_valid(type, op))
2224                                 continue;
2225
2226                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2227                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2228                                                                         name, sizeof(name));
2229                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2230                                         continue;
2231
2232                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2233                                                         type | (op << 8) | (i << 16)))
2234                                         continue;
2235
2236                                 if (!evt_num_known) {
2237                                         evt_num++;
2238                                         continue;
2239                                 }
2240
2241                                 evt_list[evt_i] = strdup(name);
2242                                 if (evt_list[evt_i] == NULL)
2243                                         goto out_enomem;
2244                                 evt_i++;
2245                         }
2246                 }
2247         }
2248
2249         if (!evt_num_known) {
2250                 evt_num_known = true;
2251                 goto restart;
2252         }
2253         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2254         evt_i = 0;
2255         while (evt_i < evt_num) {
2256                 if (name_only) {
2257                         printf("%s ", evt_list[evt_i++]);
2258                         continue;
2259                 }
2260                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2261                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2262         }
2263         if (evt_num && pager_in_use())
2264                 printf("\n");
2265
2266 out_free:
2267         evt_num = evt_i;
2268         for (evt_i = 0; evt_i < evt_num; evt_i++)
2269                 zfree(&evt_list[evt_i]);
2270         zfree(&evt_list);
2271         return evt_num;
2272
2273 out_enomem:
2274         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2275         if (evt_list)
2276                 goto out_free;
2277         return evt_num;
2278 }
2279
2280 void print_symbol_events(const char *event_glob, unsigned type,
2281                                 struct event_symbol *syms, unsigned max,
2282                                 bool name_only)
2283 {
2284         unsigned int i, evt_i = 0, evt_num = 0;
2285         char name[MAX_NAME_LEN];
2286         char **evt_list = NULL;
2287         bool evt_num_known = false;
2288
2289 restart:
2290         if (evt_num_known) {
2291                 evt_list = zalloc(sizeof(char *) * evt_num);
2292                 if (!evt_list)
2293                         goto out_enomem;
2294                 syms -= max;
2295         }
2296
2297         for (i = 0; i < max; i++, syms++) {
2298
2299                 if (event_glob != NULL && syms->symbol != NULL &&
2300                     !(strglobmatch(syms->symbol, event_glob) ||
2301                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2302                         continue;
2303
2304                 if (!is_event_supported(type, i))
2305                         continue;
2306
2307                 if (!evt_num_known) {
2308                         evt_num++;
2309                         continue;
2310                 }
2311
2312                 if (!name_only && strlen(syms->alias))
2313                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2314                 else
2315                         strncpy(name, syms->symbol, MAX_NAME_LEN);
2316
2317                 evt_list[evt_i] = strdup(name);
2318                 if (evt_list[evt_i] == NULL)
2319                         goto out_enomem;
2320                 evt_i++;
2321         }
2322
2323         if (!evt_num_known) {
2324                 evt_num_known = true;
2325                 goto restart;
2326         }
2327         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2328         evt_i = 0;
2329         while (evt_i < evt_num) {
2330                 if (name_only) {
2331                         printf("%s ", evt_list[evt_i++]);
2332                         continue;
2333                 }
2334                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2335         }
2336         if (evt_num && pager_in_use())
2337                 printf("\n");
2338
2339 out_free:
2340         evt_num = evt_i;
2341         for (evt_i = 0; evt_i < evt_num; evt_i++)
2342                 zfree(&evt_list[evt_i]);
2343         zfree(&evt_list);
2344         return;
2345
2346 out_enomem:
2347         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2348         if (evt_list)
2349                 goto out_free;
2350 }
2351
2352 /*
2353  * Print the help text for the event symbols:
2354  */
2355 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2356                         bool long_desc, bool details_flag)
2357 {
2358         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2359                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2360
2361         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2362                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2363
2364         print_hwcache_events(event_glob, name_only);
2365
2366         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2367                         details_flag);
2368
2369         if (event_glob != NULL)
2370                 return;
2371
2372         if (!name_only) {
2373                 printf("  %-50s [%s]\n",
2374                        "rNNN",
2375                        event_type_descriptors[PERF_TYPE_RAW]);
2376                 printf("  %-50s [%s]\n",
2377                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2378                        event_type_descriptors[PERF_TYPE_RAW]);
2379                 if (pager_in_use())
2380                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2381
2382                 printf("  %-50s [%s]\n",
2383                        "mem:<addr>[/len][:access]",
2384                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2385                 if (pager_in_use())
2386                         printf("\n");
2387         }
2388
2389         print_tracepoint_events(NULL, NULL, name_only);
2390
2391         print_sdt_events(NULL, NULL, name_only);
2392
2393         metricgroup__print(true, true, NULL, name_only);
2394 }
2395
2396 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2397 {
2398         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2399 }
2400
2401 static int new_term(struct parse_events_term **_term,
2402                     struct parse_events_term *temp,
2403                     char *str, u64 num)
2404 {
2405         struct parse_events_term *term;
2406
2407         term = malloc(sizeof(*term));
2408         if (!term)
2409                 return -ENOMEM;
2410
2411         *term = *temp;
2412         INIT_LIST_HEAD(&term->list);
2413
2414         switch (term->type_val) {
2415         case PARSE_EVENTS__TERM_TYPE_NUM:
2416                 term->val.num = num;
2417                 break;
2418         case PARSE_EVENTS__TERM_TYPE_STR:
2419                 term->val.str = str;
2420                 break;
2421         default:
2422                 free(term);
2423                 return -EINVAL;
2424         }
2425
2426         *_term = term;
2427         return 0;
2428 }
2429
2430 int parse_events_term__num(struct parse_events_term **term,
2431                            int type_term, char *config, u64 num,
2432                            bool no_value,
2433                            void *loc_term_, void *loc_val_)
2434 {
2435         YYLTYPE *loc_term = loc_term_;
2436         YYLTYPE *loc_val = loc_val_;
2437
2438         struct parse_events_term temp = {
2439                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2440                 .type_term = type_term,
2441                 .config    = config,
2442                 .no_value  = no_value,
2443                 .err_term  = loc_term ? loc_term->first_column : 0,
2444                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2445         };
2446
2447         return new_term(term, &temp, NULL, num);
2448 }
2449
2450 int parse_events_term__str(struct parse_events_term **term,
2451                            int type_term, char *config, char *str,
2452                            void *loc_term_, void *loc_val_)
2453 {
2454         YYLTYPE *loc_term = loc_term_;
2455         YYLTYPE *loc_val = loc_val_;
2456
2457         struct parse_events_term temp = {
2458                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2459                 .type_term = type_term,
2460                 .config    = config,
2461                 .err_term  = loc_term ? loc_term->first_column : 0,
2462                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2463         };
2464
2465         return new_term(term, &temp, str, 0);
2466 }
2467
2468 int parse_events_term__sym_hw(struct parse_events_term **term,
2469                               char *config, unsigned idx)
2470 {
2471         struct event_symbol *sym;
2472         struct parse_events_term temp = {
2473                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2474                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2475                 .config    = config ?: (char *) "event",
2476         };
2477
2478         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2479         sym = &event_symbols_hw[idx];
2480
2481         return new_term(term, &temp, (char *) sym->symbol, 0);
2482 }
2483
2484 int parse_events_term__clone(struct parse_events_term **new,
2485                              struct parse_events_term *term)
2486 {
2487         struct parse_events_term temp = {
2488                 .type_val  = term->type_val,
2489                 .type_term = term->type_term,
2490                 .config    = term->config,
2491                 .err_term  = term->err_term,
2492                 .err_val   = term->err_val,
2493         };
2494
2495         return new_term(new, &temp, term->val.str, term->val.num);
2496 }
2497
2498 int parse_events_copy_term_list(struct list_head *old,
2499                                  struct list_head **new)
2500 {
2501         struct parse_events_term *term, *n;
2502         int ret;
2503
2504         if (!old) {
2505                 *new = NULL;
2506                 return 0;
2507         }
2508
2509         *new = malloc(sizeof(struct list_head));
2510         if (!*new)
2511                 return -ENOMEM;
2512         INIT_LIST_HEAD(*new);
2513
2514         list_for_each_entry (term, old, list) {
2515                 ret = parse_events_term__clone(&n, term);
2516                 if (ret)
2517                         return ret;
2518                 list_add_tail(&n->list, *new);
2519         }
2520         return 0;
2521 }
2522
2523 void parse_events_terms__purge(struct list_head *terms)
2524 {
2525         struct parse_events_term *term, *h;
2526
2527         list_for_each_entry_safe(term, h, terms, list) {
2528                 if (term->array.nr_ranges)
2529                         zfree(&term->array.ranges);
2530                 list_del_init(&term->list);
2531                 free(term);
2532         }
2533 }
2534
2535 void parse_events_terms__delete(struct list_head *terms)
2536 {
2537         if (!terms)
2538                 return;
2539         parse_events_terms__purge(terms);
2540         free(terms);
2541 }
2542
2543 void parse_events__clear_array(struct parse_events_array *a)
2544 {
2545         zfree(&a->ranges);
2546 }
2547
2548 void parse_events_evlist_error(struct parse_events_state *parse_state,
2549                                int idx, const char *str)
2550 {
2551         struct parse_events_error *err = parse_state->error;
2552
2553         if (!err)
2554                 return;
2555         err->idx = idx;
2556         err->str = strdup(str);
2557         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2558 }
2559
2560 static void config_terms_list(char *buf, size_t buf_sz)
2561 {
2562         int i;
2563         bool first = true;
2564
2565         buf[0] = '\0';
2566         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2567                 const char *name = config_term_names[i];
2568
2569                 if (!config_term_avail(i, NULL))
2570                         continue;
2571                 if (!name)
2572                         continue;
2573                 if (name[0] == '<')
2574                         continue;
2575
2576                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2577                         return;
2578
2579                 if (!first)
2580                         strcat(buf, ",");
2581                 else
2582                         first = false;
2583                 strcat(buf, name);
2584         }
2585 }
2586
2587 /*
2588  * Return string contains valid config terms of an event.
2589  * @additional_terms: For terms such as PMU sysfs terms.
2590  */
2591 char *parse_events_formats_error_string(char *additional_terms)
2592 {
2593         char *str;
2594         /* "no-overwrite" is the longest name */
2595         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2596                           (sizeof("no-overwrite") - 1)];
2597
2598         config_terms_list(static_terms, sizeof(static_terms));
2599         /* valid terms */
2600         if (additional_terms) {
2601                 if (asprintf(&str, "valid terms: %s,%s",
2602                              additional_terms, static_terms) < 0)
2603                         goto fail;
2604         } else {
2605                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2606                         goto fail;
2607         }
2608         return str;
2609
2610 fail:
2611         return NULL;
2612 }