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 };
 904
 905 static bool config_term_shrinked;
 906
 907 static bool
 908 config_term_avail(int term_type, struct parse_events_error *err)
 909 {
 910         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 911                 err->str = strdup("Invalid term_type");
 912                 return false;
 913         }
 914         if (!config_term_shrinked)
 915                 return true;
 916
 917         switch (term_type) {
 918         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 919         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 920         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 921         case PARSE_EVENTS__TERM_TYPE_NAME:
 922                 return true;
 923         default:
 924                 if (!err)
 925                         return false;
 926
 927                 /* term_type is validated so indexing is safe */
 928                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 929                              config_term_names[term_type]) < 0)
 930                         err->str = NULL;
 931                 return false;
 932         }
 933 }
 934
 935 void parse_events__shrink_config_terms(void)
 936 {
 937         config_term_shrinked = true;
 938 }
 939
 940 static int config_term_common(struct perf_event_attr *attr,
 941                               struct parse_events_term *term,
 942                               struct parse_events_error *err)
 943 {
 944 #define CHECK_TYPE_VAL(type)                                               \
 945 do {                                                                       \
 946         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 947                 return -EINVAL;                                            \
 948 } while (0)
 949
 950         switch (term->type_term) {
 951         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 952                 CHECK_TYPE_VAL(NUM);
 953                 attr->config = term->val.num;
 954                 break;
 955         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 956                 CHECK_TYPE_VAL(NUM);
 957                 attr->config1 = term->val.num;
 958                 break;
 959         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 960                 CHECK_TYPE_VAL(NUM);
 961                 attr->config2 = term->val.num;
 962                 break;
 963         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 964                 CHECK_TYPE_VAL(NUM);
 965                 break;
 966         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 967                 CHECK_TYPE_VAL(NUM);
 968                 break;
 969         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 970                 /*
 971                  * TODO uncomment when the field is available
 972                  * attr->branch_sample_type = term->val.num;
 973                  */
 974                 break;
 975         case PARSE_EVENTS__TERM_TYPE_TIME:
 976                 CHECK_TYPE_VAL(NUM);
 977                 if (term->val.num > 1) {
 978                         err->str = strdup("expected 0 or 1");
 979                         err->idx = term->err_val;
 980                         return -EINVAL;
 981                 }
 982                 break;
 983         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 984                 CHECK_TYPE_VAL(STR);
 985                 break;
 986         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 987                 CHECK_TYPE_VAL(NUM);
 988                 break;
 989         case PARSE_EVENTS__TERM_TYPE_INHERIT:
 990                 CHECK_TYPE_VAL(NUM);
 991                 break;
 992         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
 993                 CHECK_TYPE_VAL(NUM);
 994                 break;
 995         case PARSE_EVENTS__TERM_TYPE_NAME:
 996                 CHECK_TYPE_VAL(STR);
 997                 break;
 998         default:
 999                 err->str = strdup("unknown term");
1000                 err->idx = term->err_term;
1001                 err->help = parse_events_formats_error_string(NULL);
1002                 return -EINVAL;
1003         }
1004
1005         /*
1006          * Check term availbility after basic checking so
1007          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1008          *
1009          * If check availbility at the entry of this function,
1010          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1011          * if an invalid config term is provided for legacy events
1012          * (for example, instructions/badterm/...), which is confusing.
1013          */
1014         if (!config_term_avail(term->type_term, err))
1015                 return -EINVAL;
1016         return 0;
1017 #undef CHECK_TYPE_VAL
1018 }
1019
1020 static int config_term_pmu(struct perf_event_attr *attr,
1021                            struct parse_events_term *term,
1022                            struct parse_events_error *err)
1023 {
1024         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
1025                 /*
1026                  * Always succeed for sysfs terms, as we dont know
1027                  * at this point what type they need to have.
1028                  */
1029                 return 0;
1030         else
1031                 return config_term_common(attr, term, err);
1032 }
1033
1034 static int config_term_tracepoint(struct perf_event_attr *attr,
1035                                   struct parse_events_term *term,
1036                                   struct parse_events_error *err)
1037 {
1038         switch (term->type_term) {
1039         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1040         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1041         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1042         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1043                 return config_term_common(attr, term, err);
1044         default:
1045                 if (err) {
1046                         err->idx = term->err_term;
1047                         err->str = strdup("unknown term");
1048                         err->help = strdup("valid terms: call-graph,stack-size\n");
1049                 }
1050                 return -EINVAL;
1051         }
1052
1053         return 0;
1054 }
1055
1056 static int config_attr(struct perf_event_attr *attr,
1057                        struct list_head *head,
1058                        struct parse_events_error *err,
1059                        config_term_func_t config_term)
1060 {
1061         struct parse_events_term *term;
1062
1063         list_for_each_entry(term, head, list)
1064                 if (config_term(attr, term, err))
1065                         return -EINVAL;
1066
1067         return 0;
1068 }
1069
1070 static int get_config_terms(struct list_head *head_config,
1071                             struct list_head *head_terms __maybe_unused)
1072 {
1073 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1074 do {                                                            \
1075         struct perf_evsel_config_term *__t;                     \
1076                                                                 \
1077         __t = zalloc(sizeof(*__t));                             \
1078         if (!__t)                                               \
1079                 return -ENOMEM;                                 \
1080                                                                 \
1081         INIT_LIST_HEAD(&__t->list);                             \
1082         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1083         __t->val.__name = __val;                                \
1084         list_add_tail(&__t->list, head_terms);                  \
1085 } while (0)
1086
1087         struct parse_events_term *term;
1088
1089         list_for_each_entry(term, head_config, list) {
1090                 switch (term->type_term) {
1091                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1092                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1093                         break;
1094                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1095                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1096                         break;
1097                 case PARSE_EVENTS__TERM_TYPE_TIME:
1098                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1099                         break;
1100                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1101                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1102                         break;
1103                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1104                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1105                         break;
1106                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1107                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1108                         break;
1109                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1110                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1111                         break;
1112                 default:
1113                         break;
1114                 }
1115         }
1116 #undef ADD_EVSEL_CONFIG
1117         return 0;
1118 }
1119
1120 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1121                                 char *sys, char *event,
1122                                 struct parse_events_error *err,
1123                                 struct list_head *head_config)
1124 {
1125         if (head_config) {
1126                 struct perf_event_attr attr;
1127
1128                 if (config_attr(&attr, head_config, err,
1129                                 config_term_tracepoint))
1130                         return -EINVAL;
1131         }
1132
1133         if (strpbrk(sys, "*?"))
1134                 return add_tracepoint_multi_sys(list, idx, sys, event,
1135                                                 err, head_config);
1136         else
1137                 return add_tracepoint_event(list, idx, sys, event,
1138                                             err, head_config);
1139 }
1140
1141 int parse_events_add_numeric(struct parse_events_evlist *data,
1142                              struct list_head *list,
1143                              u32 type, u64 config,
1144                              struct list_head *head_config)
1145 {
1146         struct perf_event_attr attr;
1147         LIST_HEAD(config_terms);
1148
1149         memset(&attr, 0, sizeof(attr));
1150         attr.type = type;
1151         attr.config = config;
1152
1153         if (head_config) {
1154                 if (config_attr(&attr, head_config, data->error,
1155                                 config_term_common))
1156                         return -EINVAL;
1157
1158                 if (get_config_terms(head_config, &config_terms))
1159                         return -ENOMEM;
1160         }
1161
1162         return add_event(list, &data->idx, &attr,
1163                          get_config_name(head_config), &config_terms);
1164 }
1165
1166 int parse_events_add_pmu(struct parse_events_evlist *data,
1167                          struct list_head *list, char *name,
1168                          struct list_head *head_config)
1169 {
1170         struct perf_event_attr attr;
1171         struct perf_pmu_info info;
1172         struct perf_pmu *pmu;
1173         struct perf_evsel *evsel;
1174         LIST_HEAD(config_terms);
1175
1176         pmu = perf_pmu__find(name);
1177         if (!pmu)
1178                 return -EINVAL;
1179
1180         if (pmu->default_config) {
1181                 memcpy(&attr, pmu->default_config,
1182                        sizeof(struct perf_event_attr));
1183         } else {
1184                 memset(&attr, 0, sizeof(attr));
1185         }
1186
1187         if (!head_config) {
1188                 attr.type = pmu->type;
1189                 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1190                 return evsel ? 0 : -ENOMEM;
1191         }
1192
1193         if (perf_pmu__check_alias(pmu, head_config, &info))
1194                 return -EINVAL;
1195
1196         /*
1197          * Configure hardcoded terms first, no need to check
1198          * return value when called with fail == 0 ;)
1199          */
1200         if (config_attr(&attr, head_config, data->error, config_term_pmu))
1201                 return -EINVAL;
1202
1203         if (get_config_terms(head_config, &config_terms))
1204                 return -ENOMEM;
1205
1206         if (perf_pmu__config(pmu, &attr, head_config, data->error))
1207                 return -EINVAL;
1208
1209         evsel = __add_event(list, &data->idx, &attr,
1210                             get_config_name(head_config), pmu->cpus,
1211                             &config_terms);
1212         if (evsel) {
1213                 evsel->unit = info.unit;
1214                 evsel->scale = info.scale;
1215                 evsel->per_pkg = info.per_pkg;
1216                 evsel->snapshot = info.snapshot;
1217         }
1218
1219         return evsel ? 0 : -ENOMEM;
1220 }
1221
1222 int parse_events__modifier_group(struct list_head *list,
1223                                  char *event_mod)
1224 {
1225         return parse_events__modifier_event(list, event_mod, true);
1226 }
1227
1228 void parse_events__set_leader(char *name, struct list_head *list)
1229 {
1230         struct perf_evsel *leader;
1231
1232         if (list_empty(list)) {
1233                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1234                 return;
1235         }
1236
1237         __perf_evlist__set_leader(list);
1238         leader = list_entry(list->next, struct perf_evsel, node);
1239         leader->group_name = name ? strdup(name) : NULL;
1240 }
1241
1242 /* list_event is assumed to point to malloc'ed memory */
1243 void parse_events_update_lists(struct list_head *list_event,
1244                                struct list_head *list_all)
1245 {
1246         /*
1247          * Called for single event definition. Update the
1248          * 'all event' list, and reinit the 'single event'
1249          * list, for next event definition.
1250          */
1251         list_splice_tail(list_event, list_all);
1252         free(list_event);
1253 }
1254
1255 struct event_modifier {
1256         int eu;
1257         int ek;
1258         int eh;
1259         int eH;
1260         int eG;
1261         int eI;
1262         int precise;
1263         int precise_max;
1264         int exclude_GH;
1265         int sample_read;
1266         int pinned;
1267 };
1268
1269 static int get_event_modifier(struct event_modifier *mod, char *str,
1270                                struct perf_evsel *evsel)
1271 {
1272         int eu = evsel ? evsel->attr.exclude_user : 0;
1273         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1274         int eh = evsel ? evsel->attr.exclude_hv : 0;
1275         int eH = evsel ? evsel->attr.exclude_host : 0;
1276         int eG = evsel ? evsel->attr.exclude_guest : 0;
1277         int eI = evsel ? evsel->attr.exclude_idle : 0;
1278         int precise = evsel ? evsel->attr.precise_ip : 0;
1279         int precise_max = 0;
1280         int sample_read = 0;
1281         int pinned = evsel ? evsel->attr.pinned : 0;
1282
1283         int exclude = eu | ek | eh;
1284         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1285
1286         memset(mod, 0, sizeof(*mod));
1287
1288         while (*str) {
1289                 if (*str == 'u') {
1290                         if (!exclude)
1291                                 exclude = eu = ek = eh = 1;
1292                         eu = 0;
1293                 } else if (*str == 'k') {
1294                         if (!exclude)
1295                                 exclude = eu = ek = eh = 1;
1296                         ek = 0;
1297                 } else if (*str == 'h') {
1298                         if (!exclude)
1299                                 exclude = eu = ek = eh = 1;
1300                         eh = 0;
1301                 } else if (*str == 'G') {
1302                         if (!exclude_GH)
1303                                 exclude_GH = eG = eH = 1;
1304                         eG = 0;
1305                 } else if (*str == 'H') {
1306                         if (!exclude_GH)
1307                                 exclude_GH = eG = eH = 1;
1308                         eH = 0;
1309                 } else if (*str == 'I') {
1310                         eI = 1;
1311                 } else if (*str == 'p') {
1312                         precise++;
1313                         /* use of precise requires exclude_guest */
1314                         if (!exclude_GH)
1315                                 eG = 1;
1316                 } else if (*str == 'P') {
1317                         precise_max = 1;
1318                 } else if (*str == 'S') {
1319                         sample_read = 1;
1320                 } else if (*str == 'D') {
1321                         pinned = 1;
1322                 } else
1323                         break;
1324
1325                 ++str;
1326         }
1327
1328         /*
1329          * precise ip:
1330          *
1331          *  0 - SAMPLE_IP can have arbitrary skid
1332          *  1 - SAMPLE_IP must have constant skid
1333          *  2 - SAMPLE_IP requested to have 0 skid
1334          *  3 - SAMPLE_IP must have 0 skid
1335          *
1336          *  See also PERF_RECORD_MISC_EXACT_IP
1337          */
1338         if (precise > 3)
1339                 return -EINVAL;
1340
1341         mod->eu = eu;
1342         mod->ek = ek;
1343         mod->eh = eh;
1344         mod->eH = eH;
1345         mod->eG = eG;
1346         mod->eI = eI;
1347         mod->precise = precise;
1348         mod->precise_max = precise_max;
1349         mod->exclude_GH = exclude_GH;
1350         mod->sample_read = sample_read;
1351         mod->pinned = pinned;
1352
1353         return 0;
1354 }
1355
1356 /*
1357  * Basic modifier sanity check to validate it contains only one
1358  * instance of any modifier (apart from 'p') present.
1359  */
1360 static int check_modifier(char *str)
1361 {
1362         char *p = str;
1363
1364         /* The sizeof includes 0 byte as well. */
1365         if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1366                 return -1;
1367
1368         while (*p) {
1369                 if (*p != 'p' && strchr(p + 1, *p))
1370                         return -1;
1371                 p++;
1372         }
1373
1374         return 0;
1375 }
1376
1377 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1378 {
1379         struct perf_evsel *evsel;
1380         struct event_modifier mod;
1381
1382         if (str == NULL)
1383                 return 0;
1384
1385         if (check_modifier(str))
1386                 return -EINVAL;
1387
1388         if (!add && get_event_modifier(&mod, str, NULL))
1389                 return -EINVAL;
1390
1391         __evlist__for_each(list, evsel) {
1392                 if (add && get_event_modifier(&mod, str, evsel))
1393                         return -EINVAL;
1394
1395                 evsel->attr.exclude_user   = mod.eu;
1396                 evsel->attr.exclude_kernel = mod.ek;
1397                 evsel->attr.exclude_hv     = mod.eh;
1398                 evsel->attr.precise_ip     = mod.precise;
1399                 evsel->attr.exclude_host   = mod.eH;
1400                 evsel->attr.exclude_guest  = mod.eG;
1401                 evsel->attr.exclude_idle   = mod.eI;
1402                 evsel->exclude_GH          = mod.exclude_GH;
1403                 evsel->sample_read         = mod.sample_read;
1404                 evsel->precise_max         = mod.precise_max;
1405
1406                 if (perf_evsel__is_group_leader(evsel))
1407                         evsel->attr.pinned = mod.pinned;
1408         }
1409
1410         return 0;
1411 }
1412
1413 int parse_events_name(struct list_head *list, char *name)
1414 {
1415         struct perf_evsel *evsel;
1416
1417         __evlist__for_each(list, evsel) {
1418                 if (!evsel->name)
1419                         evsel->name = strdup(name);
1420         }
1421
1422         return 0;
1423 }
1424
1425 static int
1426 comp_pmu(const void *p1, const void *p2)
1427 {
1428         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1429         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1430
1431         return strcmp(pmu1->symbol, pmu2->symbol);
1432 }
1433
1434 static void perf_pmu__parse_cleanup(void)
1435 {
1436         if (perf_pmu_events_list_num > 0) {
1437                 struct perf_pmu_event_symbol *p;
1438                 int i;
1439
1440                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1441                         p = perf_pmu_events_list + i;
1442                         free(p->symbol);
1443                 }
1444                 free(perf_pmu_events_list);
1445                 perf_pmu_events_list = NULL;
1446                 perf_pmu_events_list_num = 0;
1447         }
1448 }
1449
1450 #define SET_SYMBOL(str, stype)          \
1451 do {                                    \
1452         p->symbol = str;                \
1453         if (!p->symbol)                 \
1454                 goto err;               \
1455         p->type = stype;                \
1456 } while (0)
1457
1458 /*
1459  * Read the pmu events list from sysfs
1460  * Save it into perf_pmu_events_list
1461  */
1462 static void perf_pmu__parse_init(void)
1463 {
1464
1465         struct perf_pmu *pmu = NULL;
1466         struct perf_pmu_alias *alias;
1467         int len = 0;
1468
1469         pmu = perf_pmu__find("cpu");
1470         if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1471                 perf_pmu_events_list_num = -1;
1472                 return;
1473         }
1474         list_for_each_entry(alias, &pmu->aliases, list) {
1475                 if (strchr(alias->name, '-'))
1476                         len++;
1477                 len++;
1478         }
1479         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1480         if (!perf_pmu_events_list)
1481                 return;
1482         perf_pmu_events_list_num = len;
1483
1484         len = 0;
1485         list_for_each_entry(alias, &pmu->aliases, list) {
1486                 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1487                 char *tmp = strchr(alias->name, '-');
1488
1489                 if (tmp != NULL) {
1490                         SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1491                                         PMU_EVENT_SYMBOL_PREFIX);
1492                         p++;
1493                         SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1494                         len += 2;
1495                 } else {
1496                         SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1497                         len++;
1498                 }
1499         }
1500         qsort(perf_pmu_events_list, len,
1501                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1502
1503         return;
1504 err:
1505         perf_pmu__parse_cleanup();
1506 }
1507
1508 enum perf_pmu_event_symbol_type
1509 perf_pmu__parse_check(const char *name)
1510 {
1511         struct perf_pmu_event_symbol p, *r;
1512
1513         /* scan kernel pmu events from sysfs if needed */
1514         if (perf_pmu_events_list_num == 0)
1515                 perf_pmu__parse_init();
1516         /*
1517          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1518          * cpu-cycles has been handled by hardcode.
1519          * So it must be cpu// events, not kernel pmu event.
1520          */
1521         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1522                 return PMU_EVENT_SYMBOL_ERR;
1523
1524         p.symbol = strdup(name);
1525         r = bsearch(&p, perf_pmu_events_list,
1526                         (size_t) perf_pmu_events_list_num,
1527                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1528         free(p.symbol);
1529         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1530 }
1531
1532 static int parse_events__scanner(const char *str, void *data, int start_token)
1533 {
1534         YY_BUFFER_STATE buffer;
1535         void *scanner;
1536         int ret;
1537
1538         ret = parse_events_lex_init_extra(start_token, &scanner);
1539         if (ret)
1540                 return ret;
1541
1542         buffer = parse_events__scan_string(str, scanner);
1543
1544 #ifdef PARSER_DEBUG
1545         parse_events_debug = 1;
1546 #endif
1547         ret = parse_events_parse(data, scanner);
1548
1549         parse_events__flush_buffer(buffer, scanner);
1550         parse_events__delete_buffer(buffer, scanner);
1551         parse_events_lex_destroy(scanner);
1552         return ret;
1553 }
1554
1555 /*
1556  * parse event config string, return a list of event terms.
1557  */
1558 int parse_events_terms(struct list_head *terms, const char *str)
1559 {
1560         struct parse_events_terms data = {
1561                 .terms = NULL,
1562         };
1563         int ret;
1564
1565         ret = parse_events__scanner(str, &data, PE_START_TERMS);
1566         if (!ret) {
1567                 list_splice(data.terms, terms);
1568                 zfree(&data.terms);
1569                 return 0;
1570         }
1571
1572         parse_events_terms__delete(data.terms);
1573         return ret;
1574 }
1575
1576 int parse_events(struct perf_evlist *evlist, const char *str,
1577                  struct parse_events_error *err)
1578 {
1579         struct parse_events_evlist data = {
1580                 .list   = LIST_HEAD_INIT(data.list),
1581                 .idx    = evlist->nr_entries,
1582                 .error  = err,
1583                 .evlist = evlist,
1584         };
1585         int ret;
1586
1587         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1588         perf_pmu__parse_cleanup();
1589         if (!ret) {
1590                 struct perf_evsel *last;
1591
1592                 if (list_empty(&data.list)) {
1593                         WARN_ONCE(true, "WARNING: event parser found nothing");
1594                         return -1;
1595                 }
1596
1597                 perf_evlist__splice_list_tail(evlist, &data.list);
1598                 evlist->nr_groups += data.nr_groups;
1599                 last = perf_evlist__last(evlist);
1600                 last->cmdline_group_boundary = true;
1601
1602                 return 0;
1603         }
1604
1605         /*
1606          * There are 2 users - builtin-record and builtin-test objects.
1607          * Both call perf_evlist__delete in case of error, so we dont
1608          * need to bother.
1609          */
1610         return ret;
1611 }
1612
1613 #define MAX_WIDTH 1000
1614 static int get_term_width(void)
1615 {
1616         struct winsize ws;
1617
1618         get_term_dimensions(&ws);
1619         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1620 }
1621
1622 static void parse_events_print_error(struct parse_events_error *err,
1623                                      const char *event)
1624 {
1625         const char *str = "invalid or unsupported event: ";
1626         char _buf[MAX_WIDTH];
1627         char *buf = (char *) event;
1628         int idx = 0;
1629
1630         if (err->str) {
1631                 /* -2 for extra '' in the final fprintf */
1632                 int width       = get_term_width() - 2;
1633                 int len_event   = strlen(event);
1634                 int len_str, max_len, cut = 0;
1635
1636                 /*
1637                  * Maximum error index indent, we will cut
1638                  * the event string if it's bigger.
1639                  */
1640                 int max_err_idx = 13;
1641
1642                 /*
1643                  * Let's be specific with the message when
1644                  * we have the precise error.
1645                  */
1646                 str     = "event syntax error: ";
1647                 len_str = strlen(str);
1648                 max_len = width - len_str;
1649
1650                 buf = _buf;
1651
1652                 /* We're cutting from the beggining. */
1653                 if (err->idx > max_err_idx)
1654                         cut = err->idx - max_err_idx;
1655
1656                 strncpy(buf, event + cut, max_len);
1657
1658                 /* Mark cut parts with '..' on both sides. */
1659                 if (cut)
1660                         buf[0] = buf[1] = '.';
1661
1662                 if ((len_event - cut) > max_len) {
1663                         buf[max_len - 1] = buf[max_len - 2] = '.';
1664                         buf[max_len] = 0;
1665                 }
1666
1667                 idx = len_str + err->idx - cut;
1668         }
1669
1670         fprintf(stderr, "%s'%s'\n", str, buf);
1671         if (idx) {
1672                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1673                 if (err->help)
1674                         fprintf(stderr, "\n%s\n", err->help);
1675                 free(err->str);
1676                 free(err->help);
1677         }
1678
1679         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1680 }
1681
1682 #undef MAX_WIDTH
1683
1684 int parse_events_option(const struct option *opt, const char *str,
1685                         int unset __maybe_unused)
1686 {
1687         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1688         struct parse_events_error err = { .idx = 0, };
1689         int ret = parse_events(evlist, str, &err);
1690
1691         if (ret)
1692                 parse_events_print_error(&err, str);
1693
1694         return ret;
1695 }
1696
1697 static int
1698 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1699                            int (*func)(struct perf_evsel *evsel,
1700                                        const void *arg),
1701                            const void *arg)
1702 {
1703         struct perf_evsel *last = NULL;
1704         int err;
1705
1706         /*
1707          * Don't return when list_empty, give func a chance to report
1708          * error when it found last == NULL.
1709          *
1710          * So no need to WARN here, let *func do this.
1711          */
1712         if (evlist->nr_entries > 0)
1713                 last = perf_evlist__last(evlist);
1714
1715         do {
1716                 err = (*func)(last, arg);
1717                 if (err)
1718                         return -1;
1719                 if (!last)
1720                         return 0;
1721
1722                 if (last->node.prev == &evlist->entries)
1723                         return 0;
1724                 last = list_entry(last->node.prev, struct perf_evsel, node);
1725         } while (!last->cmdline_group_boundary);
1726
1727         return 0;
1728 }
1729
1730 static int set_filter(struct perf_evsel *evsel, const void *arg)
1731 {
1732         const char *str = arg;
1733
1734         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1735                 fprintf(stderr,
1736                         "--filter option should follow a -e tracepoint option\n");
1737                 return -1;
1738         }
1739
1740         if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1741                 fprintf(stderr,
1742                         "not enough memory to hold filter string\n");
1743                 return -1;
1744         }
1745
1746         return 0;
1747 }
1748
1749 int parse_filter(const struct option *opt, const char *str,
1750                  int unset __maybe_unused)
1751 {
1752         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1753
1754         return foreach_evsel_in_last_glob(evlist, set_filter,
1755                                           (const void *)str);
1756 }
1757
1758 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1759                                    const void *arg __maybe_unused)
1760 {
1761         char new_filter[64];
1762
1763         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1764                 fprintf(stderr,
1765                         "--exclude-perf option should follow a -e tracepoint option\n");
1766                 return -1;
1767         }
1768
1769         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1770
1771         if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1772                 fprintf(stderr,
1773                         "not enough memory to hold filter string\n");
1774                 return -1;
1775         }
1776
1777         return 0;
1778 }
1779
1780 int exclude_perf(const struct option *opt,
1781                  const char *arg __maybe_unused,
1782                  int unset __maybe_unused)
1783 {
1784         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1785
1786         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1787                                           NULL);
1788 }
1789
1790 static const char * const event_type_descriptors[] = {
1791         "Hardware event",
1792         "Software event",
1793         "Tracepoint event",
1794         "Hardware cache event",
1795         "Raw hardware event descriptor",
1796         "Hardware breakpoint",
1797 };
1798
1799 static int cmp_string(const void *a, const void *b)
1800 {
1801         const char * const *as = a;
1802         const char * const *bs = b;
1803
1804         return strcmp(*as, *bs);
1805 }
1806
1807 /*
1808  * Print the events from <debugfs_mount_point>/tracing/events
1809  */
1810
1811 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1812                              bool name_only)
1813 {
1814         DIR *sys_dir, *evt_dir;
1815         struct dirent *sys_dirent, *evt_dirent;
1816         char evt_path[MAXPATHLEN];
1817         char dir_path[MAXPATHLEN];
1818         char **evt_list = NULL;
1819         unsigned int evt_i = 0, evt_num = 0;
1820         bool evt_num_known = false;
1821
1822 restart:
1823         sys_dir = opendir(tracing_events_path);
1824         if (!sys_dir)
1825                 return;
1826
1827         if (evt_num_known) {
1828                 evt_list = zalloc(sizeof(char *) * evt_num);
1829                 if (!evt_list)
1830                         goto out_close_sys_dir;
1831         }
1832
1833         for_each_subsystem(sys_dir, sys_dirent) {
1834                 if (subsys_glob != NULL &&
1835                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1836                         continue;
1837
1838                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1839                          sys_dirent->d_name);
1840                 evt_dir = opendir(dir_path);
1841                 if (!evt_dir)
1842                         continue;
1843
1844                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1845                         if (event_glob != NULL &&
1846                             !strglobmatch(evt_dirent->d_name, event_glob))
1847                                 continue;
1848
1849                         if (!evt_num_known) {
1850                                 evt_num++;
1851                                 continue;
1852                         }
1853
1854                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1855                                  sys_dirent->d_name, evt_dirent->d_name);
1856
1857                         evt_list[evt_i] = strdup(evt_path);
1858                         if (evt_list[evt_i] == NULL)
1859                                 goto out_close_evt_dir;
1860                         evt_i++;
1861                 }
1862                 closedir(evt_dir);
1863         }
1864         closedir(sys_dir);
1865
1866         if (!evt_num_known) {
1867                 evt_num_known = true;
1868                 goto restart;
1869         }
1870         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1871         evt_i = 0;
1872         while (evt_i < evt_num) {
1873                 if (name_only) {
1874                         printf("%s ", evt_list[evt_i++]);
1875                         continue;
1876                 }
1877                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1878                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1879         }
1880         if (evt_num && pager_in_use())
1881                 printf("\n");
1882
1883 out_free:
1884         evt_num = evt_i;
1885         for (evt_i = 0; evt_i < evt_num; evt_i++)
1886                 zfree(&evt_list[evt_i]);
1887         zfree(&evt_list);
1888         return;
1889
1890 out_close_evt_dir:
1891         closedir(evt_dir);
1892 out_close_sys_dir:
1893         closedir(sys_dir);
1894
1895         printf("FATAL: not enough memory to print %s\n",
1896                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1897         if (evt_list)
1898                 goto out_free;
1899 }
1900
1901 /*
1902  * Check whether event is in <debugfs_mount_point>/tracing/events
1903  */
1904
1905 int is_valid_tracepoint(const char *event_string)
1906 {
1907         DIR *sys_dir, *evt_dir;
1908         struct dirent *sys_dirent, *evt_dirent;
1909         char evt_path[MAXPATHLEN];
1910         char dir_path[MAXPATHLEN];
1911
1912         sys_dir = opendir(tracing_events_path);
1913         if (!sys_dir)
1914                 return 0;
1915
1916         for_each_subsystem(sys_dir, sys_dirent) {
1917
1918                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1919                          sys_dirent->d_name);
1920                 evt_dir = opendir(dir_path);
1921                 if (!evt_dir)
1922                         continue;
1923
1924                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1925                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1926                                  sys_dirent->d_name, evt_dirent->d_name);
1927                         if (!strcmp(evt_path, event_string)) {
1928                                 closedir(evt_dir);
1929                                 closedir(sys_dir);
1930                                 return 1;
1931                         }
1932                 }
1933                 closedir(evt_dir);
1934         }
1935         closedir(sys_dir);
1936         return 0;
1937 }
1938
1939 static bool is_event_supported(u8 type, unsigned config)
1940 {
1941         bool ret = true;
1942         int open_return;
1943         struct perf_evsel *evsel;
1944         struct perf_event_attr attr = {
1945                 .type = type,
1946                 .config = config,
1947                 .disabled = 1,
1948         };
1949         struct {
1950                 struct thread_map map;
1951                 int threads[1];
1952         } tmap = {
1953                 .map.nr  = 1,
1954                 .threads = { 0 },
1955         };
1956
1957         evsel = perf_evsel__new(&attr);
1958         if (evsel) {
1959                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1960                 ret = open_return >= 0;
1961
1962                 if (open_return == -EACCES) {
1963                         /*
1964                          * This happens if the paranoid value
1965                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1966                          * Re-run with exclude_kernel set; we don't do that
1967                          * by default as some ARM machines do not support it.
1968                          *
1969                          */
1970                         evsel->attr.exclude_kernel = 1;
1971                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1972                 }
1973                 perf_evsel__delete(evsel);
1974         }
1975
1976         return ret;
1977 }
1978
1979 int print_hwcache_events(const char *event_glob, bool name_only)
1980 {
1981         unsigned int type, op, i, evt_i = 0, evt_num = 0;
1982         char name[64];
1983         char **evt_list = NULL;
1984         bool evt_num_known = false;
1985
1986 restart:
1987         if (evt_num_known) {
1988                 evt_list = zalloc(sizeof(char *) * evt_num);
1989                 if (!evt_list)
1990                         goto out_enomem;
1991         }
1992
1993         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1994                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1995                         /* skip invalid cache type */
1996                         if (!perf_evsel__is_cache_op_valid(type, op))
1997                                 continue;
1998
1999                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2000                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2001                                                                         name, sizeof(name));
2002                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2003                                         continue;
2004
2005                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2006                                                         type | (op << 8) | (i << 16)))
2007                                         continue;
2008
2009                                 if (!evt_num_known) {
2010                                         evt_num++;
2011                                         continue;
2012                                 }
2013
2014                                 evt_list[evt_i] = strdup(name);
2015                                 if (evt_list[evt_i] == NULL)
2016                                         goto out_enomem;
2017                                 evt_i++;
2018                         }
2019                 }
2020         }
2021
2022         if (!evt_num_known) {
2023                 evt_num_known = true;
2024                 goto restart;
2025         }
2026         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2027         evt_i = 0;
2028         while (evt_i < evt_num) {
2029                 if (name_only) {
2030                         printf("%s ", evt_list[evt_i++]);
2031                         continue;
2032                 }
2033                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2034                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2035         }
2036         if (evt_num && pager_in_use())
2037                 printf("\n");
2038
2039 out_free:
2040         evt_num = evt_i;
2041         for (evt_i = 0; evt_i < evt_num; evt_i++)
2042                 zfree(&evt_list[evt_i]);
2043         zfree(&evt_list);
2044         return evt_num;
2045
2046 out_enomem:
2047         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2048         if (evt_list)
2049                 goto out_free;
2050         return evt_num;
2051 }
2052
2053 void print_symbol_events(const char *event_glob, unsigned type,
2054                                 struct event_symbol *syms, unsigned max,
2055                                 bool name_only)
2056 {
2057         unsigned int i, evt_i = 0, evt_num = 0;
2058         char name[MAX_NAME_LEN];
2059         char **evt_list = NULL;
2060         bool evt_num_known = false;
2061
2062 restart:
2063         if (evt_num_known) {
2064                 evt_list = zalloc(sizeof(char *) * evt_num);
2065                 if (!evt_list)
2066                         goto out_enomem;
2067                 syms -= max;
2068         }
2069
2070         for (i = 0; i < max; i++, syms++) {
2071
2072                 if (event_glob != NULL && syms->symbol != NULL &&
2073                     !(strglobmatch(syms->symbol, event_glob) ||
2074                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2075                         continue;
2076
2077                 if (!is_event_supported(type, i))
2078                         continue;
2079
2080                 if (!evt_num_known) {
2081                         evt_num++;
2082                         continue;
2083                 }
2084
2085                 if (!name_only && strlen(syms->alias))
2086                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2087                 else
2088                         strncpy(name, syms->symbol, MAX_NAME_LEN);
2089
2090                 evt_list[evt_i] = strdup(name);
2091                 if (evt_list[evt_i] == NULL)
2092                         goto out_enomem;
2093                 evt_i++;
2094         }
2095
2096         if (!evt_num_known) {
2097                 evt_num_known = true;
2098                 goto restart;
2099         }
2100         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2101         evt_i = 0;
2102         while (evt_i < evt_num) {
2103                 if (name_only) {
2104                         printf("%s ", evt_list[evt_i++]);
2105                         continue;
2106                 }
2107                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2108         }
2109         if (evt_num && pager_in_use())
2110                 printf("\n");
2111
2112 out_free:
2113         evt_num = evt_i;
2114         for (evt_i = 0; evt_i < evt_num; evt_i++)
2115                 zfree(&evt_list[evt_i]);
2116         zfree(&evt_list);
2117         return;
2118
2119 out_enomem:
2120         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2121         if (evt_list)
2122                 goto out_free;
2123 }
2124
2125 /*
2126  * Print the help text for the event symbols:
2127  */
2128 void print_events(const char *event_glob, bool name_only)
2129 {
2130         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2131                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2132
2133         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2134                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2135
2136         print_hwcache_events(event_glob, name_only);
2137
2138         print_pmu_events(event_glob, name_only);
2139
2140         if (event_glob != NULL)
2141                 return;
2142
2143         if (!name_only) {
2144                 printf("  %-50s [%s]\n",
2145                        "rNNN",
2146                        event_type_descriptors[PERF_TYPE_RAW]);
2147                 printf("  %-50s [%s]\n",
2148                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2149                        event_type_descriptors[PERF_TYPE_RAW]);
2150                 if (pager_in_use())
2151                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2152
2153                 printf("  %-50s [%s]\n",
2154                        "mem:<addr>[/len][:access]",
2155                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2156                 if (pager_in_use())
2157                         printf("\n");
2158         }
2159
2160         print_tracepoint_events(NULL, NULL, name_only);
2161 }
2162
2163 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2164 {
2165         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2166 }
2167
2168 static int new_term(struct parse_events_term **_term, int type_val,
2169                     int type_term, char *config,
2170                     char *str, u64 num, int err_term, int err_val)
2171 {
2172         struct parse_events_term *term;
2173
2174         term = zalloc(sizeof(*term));
2175         if (!term)
2176                 return -ENOMEM;
2177
2178         INIT_LIST_HEAD(&term->list);
2179         term->type_val  = type_val;
2180         term->type_term = type_term;
2181         term->config = config;
2182         term->err_term = err_term;
2183         term->err_val  = err_val;
2184
2185         switch (type_val) {
2186         case PARSE_EVENTS__TERM_TYPE_NUM:
2187                 term->val.num = num;
2188                 break;
2189         case PARSE_EVENTS__TERM_TYPE_STR:
2190                 term->val.str = str;
2191                 break;
2192         default:
2193                 free(term);
2194                 return -EINVAL;
2195         }
2196
2197         *_term = term;
2198         return 0;
2199 }
2200
2201 int parse_events_term__num(struct parse_events_term **term,
2202                            int type_term, char *config, u64 num,
2203                            void *loc_term_, void *loc_val_)
2204 {
2205         YYLTYPE *loc_term = loc_term_;
2206         YYLTYPE *loc_val = loc_val_;
2207
2208         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2209                         config, NULL, num,
2210                         loc_term ? loc_term->first_column : 0,
2211                         loc_val ? loc_val->first_column : 0);
2212 }
2213
2214 int parse_events_term__str(struct parse_events_term **term,
2215                            int type_term, char *config, char *str,
2216                            void *loc_term_, void *loc_val_)
2217 {
2218         YYLTYPE *loc_term = loc_term_;
2219         YYLTYPE *loc_val = loc_val_;
2220
2221         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2222                         config, str, 0,
2223                         loc_term ? loc_term->first_column : 0,
2224                         loc_val ? loc_val->first_column : 0);
2225 }
2226
2227 int parse_events_term__sym_hw(struct parse_events_term **term,
2228                               char *config, unsigned idx)
2229 {
2230         struct event_symbol *sym;
2231
2232         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2233         sym = &event_symbols_hw[idx];
2234
2235         if (config)
2236                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2237                                 PARSE_EVENTS__TERM_TYPE_USER, config,
2238                                 (char *) sym->symbol, 0, 0, 0);
2239         else
2240                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2241                                 PARSE_EVENTS__TERM_TYPE_USER,
2242                                 (char *) "event", (char *) sym->symbol,
2243                                 0, 0, 0);
2244 }
2245
2246 int parse_events_term__clone(struct parse_events_term **new,
2247                              struct parse_events_term *term)
2248 {
2249         return new_term(new, term->type_val, term->type_term, term->config,
2250                         term->val.str, term->val.num,
2251                         term->err_term, term->err_val);
2252 }
2253
2254 void parse_events_terms__purge(struct list_head *terms)
2255 {
2256         struct parse_events_term *term, *h;
2257
2258         list_for_each_entry_safe(term, h, terms, list) {
2259                 if (term->array.nr_ranges)
2260                         free(term->array.ranges);
2261                 list_del_init(&term->list);
2262                 free(term);
2263         }
2264 }
2265
2266 void parse_events_terms__delete(struct list_head *terms)
2267 {
2268         if (!terms)
2269                 return;
2270         parse_events_terms__purge(terms);
2271         free(terms);
2272 }
2273
2274 void parse_events__clear_array(struct parse_events_array *a)
2275 {
2276         free(a->ranges);
2277 }
2278
2279 void parse_events_evlist_error(struct parse_events_evlist *data,
2280                                int idx, const char *str)
2281 {
2282         struct parse_events_error *err = data->error;
2283
2284         if (!err)
2285                 return;
2286         err->idx = idx;
2287         err->str = strdup(str);
2288         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2289 }
2290
2291 static void config_terms_list(char *buf, size_t buf_sz)
2292 {
2293         int i;
2294         bool first = true;
2295
2296         buf[0] = '\0';
2297         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2298                 const char *name = config_term_names[i];
2299
2300                 if (!config_term_avail(i, NULL))
2301                         continue;
2302                 if (!name)
2303                         continue;
2304                 if (name[0] == '<')
2305                         continue;
2306
2307                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2308                         return;
2309
2310                 if (!first)
2311                         strcat(buf, ",");
2312                 else
2313                         first = false;
2314                 strcat(buf, name);
2315         }
2316 }
2317
2318 /*
2319  * Return string contains valid config terms of an event.
2320  * @additional_terms: For terms such as PMU sysfs terms.
2321  */
2322 char *parse_events_formats_error_string(char *additional_terms)
2323 {
2324         char *str;
2325         /* "branch_type" is the longest name */
2326         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2327                           (sizeof("branch_type") - 1)];
2328
2329         config_terms_list(static_terms, sizeof(static_terms));
2330         /* valid terms */
2331         if (additional_terms) {
2332                 if (asprintf(&str, "valid terms: %s,%s",
2333                              additional_terms, static_terms) < 0)
2334                         goto fail;
2335         } else {
2336                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2337                         goto fail;
2338         }
2339         return str;
2340
2341 fail:
2342         return NULL;
2343 }