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