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