tools/perf/util/parse-events.c

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