tools/perf/util/parse-events.c

   1 #include <linux/hw_breakpoint.h>
   2 #include "util.h"
   3 #include "../perf.h"
   4 #include "evlist.h"
   5 #include "evsel.h"
   6 #include "parse-options.h"
   7 #include "parse-events.h"
   8 #include "exec_cmd.h"
   9 #include "string.h"
  10 #include "symbol.h"
  11 #include "cache.h"
  12 #include "header.h"
  13 #include "debug.h"
  14 #include <api/fs/debugfs.h>
  15 #include "parse-events-bison.h"
  16 #define YY_EXTRA_TYPE int
  17 #include "parse-events-flex.h"
  18 #include "pmu.h"
  19 #include "thread_map.h"
  20 #include "cpumap.h"
  21 #include "asm/bug.h"
  22
  23 #define MAX_NAME_LEN 100
  24
  25 #ifdef PARSER_DEBUG
  26 extern int parse_events_debug;
  27 #endif
  28 int parse_events_parse(void *data, void *scanner);
  29
  30 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  31 /*
  32  * The variable indicates the number of supported pmu event symbols.
  33  * 0 means not initialized and ready to init
  34  * -1 means failed to init, don't try anymore
  35  * >0 is the number of supported pmu event symbols
  36  */
  37 static int perf_pmu_events_list_num;
  38
  39 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  40         [PERF_COUNT_HW_CPU_CYCLES] = {
  41                 .symbol = "cpu-cycles",
  42                 .alias  = "cycles",
  43         },
  44         [PERF_COUNT_HW_INSTRUCTIONS] = {
  45                 .symbol = "instructions",
  46                 .alias  = "",
  47         },
  48         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  49                 .symbol = "cache-references",
  50                 .alias  = "",
  51         },
  52         [PERF_COUNT_HW_CACHE_MISSES] = {
  53                 .symbol = "cache-misses",
  54                 .alias  = "",
  55         },
  56         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  57                 .symbol = "branch-instructions",
  58                 .alias  = "branches",
  59         },
  60         [PERF_COUNT_HW_BRANCH_MISSES] = {
  61                 .symbol = "branch-misses",
  62                 .alias  = "",
  63         },
  64         [PERF_COUNT_HW_BUS_CYCLES] = {
  65                 .symbol = "bus-cycles",
  66                 .alias  = "",
  67         },
  68         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  69                 .symbol = "stalled-cycles-frontend",
  70                 .alias  = "idle-cycles-frontend",
  71         },
  72         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  73                 .symbol = "stalled-cycles-backend",
  74                 .alias  = "idle-cycles-backend",
  75         },
  76         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  77                 .symbol = "ref-cycles",
  78                 .alias  = "",
  79         },
  80 };
  81
  82 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  83         [PERF_COUNT_SW_CPU_CLOCK] = {
  84                 .symbol = "cpu-clock",
  85                 .alias  = "",
  86         },
  87         [PERF_COUNT_SW_TASK_CLOCK] = {
  88                 .symbol = "task-clock",
  89                 .alias  = "",
  90         },
  91         [PERF_COUNT_SW_PAGE_FAULTS] = {
  92                 .symbol = "page-faults",
  93                 .alias  = "faults",
  94         },
  95         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  96                 .symbol = "context-switches",
  97                 .alias  = "cs",
  98         },
  99         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 100                 .symbol = "cpu-migrations",
 101                 .alias  = "migrations",
 102         },
 103         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 104                 .symbol = "minor-faults",
 105                 .alias  = "",
 106         },
 107         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 108                 .symbol = "major-faults",
 109                 .alias  = "",
 110         },
 111         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 112                 .symbol = "alignment-faults",
 113                 .alias  = "",
 114         },
 115         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 116                 .symbol = "emulation-faults",
 117                 .alias  = "",
 118         },
 119         [PERF_COUNT_SW_DUMMY] = {
 120                 .symbol = "dummy",
 121                 .alias  = "",
 122         },
 123 };
 124
 125 #define __PERF_EVENT_FIELD(config, name) \
 126         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 127
 128 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 129 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 130 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 131 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 132
 133 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 134         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 135         if (sys_dirent.d_type == DT_DIR &&                                     \
 136            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 137            (strcmp(sys_dirent.d_name, "..")))
 138
 139 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 140 {
 141         char evt_path[MAXPATHLEN];
 142         int fd;
 143
 144         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 145                         sys_dir->d_name, evt_dir->d_name);
 146         fd = open(evt_path, O_RDONLY);
 147         if (fd < 0)
 148                 return -EINVAL;
 149         close(fd);
 150
 151         return 0;
 152 }
 153
 154 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 155         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 156         if (evt_dirent.d_type == DT_DIR &&                                     \
 157            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 158            (strcmp(evt_dirent.d_name, "..")) &&                                \
 159            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 160
 161 #define MAX_EVENT_LENGTH 512
 162
 163
 164 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 165 {
 166         struct tracepoint_path *path = NULL;
 167         DIR *sys_dir, *evt_dir;
 168         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 169         char id_buf[24];
 170         int fd;
 171         u64 id;
 172         char evt_path[MAXPATHLEN];
 173         char dir_path[MAXPATHLEN];
 174
 175         sys_dir = opendir(tracing_events_path);
 176         if (!sys_dir)
 177                 return NULL;
 178
 179         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 180
 181                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 182                          sys_dirent.d_name);
 183                 evt_dir = opendir(dir_path);
 184                 if (!evt_dir)
 185                         continue;
 186
 187                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 188
 189                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 190                                  evt_dirent.d_name);
 191                         fd = open(evt_path, O_RDONLY);
 192                         if (fd < 0)
 193                                 continue;
 194                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 195                                 close(fd);
 196                                 continue;
 197                         }
 198                         close(fd);
 199                         id = atoll(id_buf);
 200                         if (id == config) {
 201                                 closedir(evt_dir);
 202                                 closedir(sys_dir);
 203                                 path = zalloc(sizeof(*path));
 204                                 path->system = malloc(MAX_EVENT_LENGTH);
 205                                 if (!path->system) {
 206                                         free(path);
 207                                         return NULL;
 208                                 }
 209                                 path->name = malloc(MAX_EVENT_LENGTH);
 210                                 if (!path->name) {
 211                                         zfree(&path->system);
 212                                         free(path);
 213                                         return NULL;
 214                                 }
 215                                 strncpy(path->system, sys_dirent.d_name,
 216                                         MAX_EVENT_LENGTH);
 217                                 strncpy(path->name, evt_dirent.d_name,
 218                                         MAX_EVENT_LENGTH);
 219                                 return path;
 220                         }
 221                 }
 222                 closedir(evt_dir);
 223         }
 224
 225         closedir(sys_dir);
 226         return NULL;
 227 }
 228
 229 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 230 {
 231         struct tracepoint_path *path = zalloc(sizeof(*path));
 232         char *str = strchr(name, ':');
 233
 234         if (path == NULL || str == NULL) {
 235                 free(path);
 236                 return NULL;
 237         }
 238
 239         path->system = strndup(name, str - name);
 240         path->name = strdup(str+1);
 241
 242         if (path->system == NULL || path->name == NULL) {
 243                 zfree(&path->system);
 244                 zfree(&path->name);
 245                 free(path);
 246                 path = NULL;
 247         }
 248
 249         return path;
 250 }
 251
 252 const char *event_type(int type)
 253 {
 254         switch (type) {
 255         case PERF_TYPE_HARDWARE:
 256                 return "hardware";
 257
 258         case PERF_TYPE_SOFTWARE:
 259                 return "software";
 260
 261         case PERF_TYPE_TRACEPOINT:
 262                 return "tracepoint";
 263
 264         case PERF_TYPE_HW_CACHE:
 265                 return "hardware-cache";
 266
 267         default:
 268                 break;
 269         }
 270
 271         return "unknown";
 272 }
 273
 274
 275
 276 static struct perf_evsel *
 277 __add_event(struct list_head *list, int *idx,
 278             struct perf_event_attr *attr,
 279             char *name, struct cpu_map *cpus,
 280             struct list_head *config_terms)
 281 {
 282         struct perf_evsel *evsel;
 283
 284         event_attr_init(attr);
 285
 286         evsel = perf_evsel__new_idx(attr, (*idx)++);
 287         if (!evsel)
 288                 return NULL;
 289
 290         evsel->cpus     = cpu_map__get(cpus);
 291         evsel->own_cpus = cpu_map__get(cpus);
 292
 293         if (name)
 294                 evsel->name = strdup(name);
 295
 296         if (config_terms)
 297                 list_splice(config_terms, &evsel->config_terms);
 298
 299         list_add_tail(&evsel->node, list);
 300         return evsel;
 301 }
 302
 303 static int add_event(struct list_head *list, int *idx,
 304                      struct perf_event_attr *attr, char *name,
 305                      struct list_head *config_terms)
 306 {
 307         return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
 308 }
 309
 310 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 311 {
 312         int i, j;
 313         int n, longest = -1;
 314
 315         for (i = 0; i < size; i++) {
 316                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 317                         n = strlen(names[i][j]);
 318                         if (n > longest && !strncasecmp(str, names[i][j], n))
 319                                 longest = n;
 320                 }
 321                 if (longest > 0)
 322                         return i;
 323         }
 324
 325         return -1;
 326 }
 327
 328 int parse_events_add_cache(struct list_head *list, int *idx,
 329                            char *type, char *op_result1, char *op_result2)
 330 {
 331         struct perf_event_attr attr;
 332         char name[MAX_NAME_LEN];
 333         int cache_type = -1, cache_op = -1, cache_result = -1;
 334         char *op_result[2] = { op_result1, op_result2 };
 335         int i, n;
 336
 337         /*
 338          * No fallback - if we cannot get a clear cache type
 339          * then bail out:
 340          */
 341         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 342                                    PERF_COUNT_HW_CACHE_MAX);
 343         if (cache_type == -1)
 344                 return -EINVAL;
 345
 346         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 347
 348         for (i = 0; (i < 2) && (op_result[i]); i++) {
 349                 char *str = op_result[i];
 350
 351                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 352
 353                 if (cache_op == -1) {
 354                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 355                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 356                         if (cache_op >= 0) {
 357                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 358                                         return -EINVAL;
 359                                 continue;
 360                         }
 361                 }
 362
 363                 if (cache_result == -1) {
 364                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 365                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 366                         if (cache_result >= 0)
 367                                 continue;
 368                 }
 369         }
 370
 371         /*
 372          * Fall back to reads:
 373          */
 374         if (cache_op == -1)
 375                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 376
 377         /*
 378          * Fall back to accesses:
 379          */
 380         if (cache_result == -1)
 381                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 382
 383         memset(&attr, 0, sizeof(attr));
 384         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 385         attr.type = PERF_TYPE_HW_CACHE;
 386         return add_event(list, idx, &attr, name, NULL);
 387 }
 388
 389 static int add_tracepoint(struct list_head *list, int *idx,
 390                           char *sys_name, char *evt_name)
 391 {
 392         struct perf_evsel *evsel;
 393
 394         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 395         if (!evsel)
 396                 return -ENOMEM;
 397
 398         list_add_tail(&evsel->node, list);
 399
 400         return 0;
 401 }
 402
 403 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 404                                       char *sys_name, char *evt_name)
 405 {
 406         char evt_path[MAXPATHLEN];
 407         struct dirent *evt_ent;
 408         DIR *evt_dir;
 409         int ret = 0;
 410
 411         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 412         evt_dir = opendir(evt_path);
 413         if (!evt_dir) {
 414                 perror("Can't open event dir");
 415                 return -1;
 416         }
 417
 418         while (!ret && (evt_ent = readdir(evt_dir))) {
 419                 if (!strcmp(evt_ent->d_name, ".")
 420                     || !strcmp(evt_ent->d_name, "..")
 421                     || !strcmp(evt_ent->d_name, "enable")
 422                     || !strcmp(evt_ent->d_name, "filter"))
 423                         continue;
 424
 425                 if (!strglobmatch(evt_ent->d_name, evt_name))
 426                         continue;
 427
 428                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 429         }
 430
 431         closedir(evt_dir);
 432         return ret;
 433 }
 434
 435 static int add_tracepoint_event(struct list_head *list, int *idx,
 436                                 char *sys_name, char *evt_name)
 437 {
 438         return strpbrk(evt_name, "*?") ?
 439                add_tracepoint_multi_event(list, idx, sys_name, evt_name) :
 440                add_tracepoint(list, idx, sys_name, evt_name);
 441 }
 442
 443 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 444                                     char *sys_name, char *evt_name)
 445 {
 446         struct dirent *events_ent;
 447         DIR *events_dir;
 448         int ret = 0;
 449
 450         events_dir = opendir(tracing_events_path);
 451         if (!events_dir) {
 452                 perror("Can't open event dir");
 453                 return -1;
 454         }
 455
 456         while (!ret && (events_ent = readdir(events_dir))) {
 457                 if (!strcmp(events_ent->d_name, ".")
 458                     || !strcmp(events_ent->d_name, "..")
 459                     || !strcmp(events_ent->d_name, "enable")
 460                     || !strcmp(events_ent->d_name, "header_event")
 461                     || !strcmp(events_ent->d_name, "header_page"))
 462                         continue;
 463
 464                 if (!strglobmatch(events_ent->d_name, sys_name))
 465                         continue;
 466
 467                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 468                                            evt_name);
 469         }
 470
 471         closedir(events_dir);
 472         return ret;
 473 }
 474
 475 int parse_events_add_tracepoint(struct list_head *list, int *idx,
 476                                 char *sys, char *event)
 477 {
 478         if (strpbrk(sys, "*?"))
 479                 return add_tracepoint_multi_sys(list, idx, sys, event);
 480         else
 481                 return add_tracepoint_event(list, idx, sys, event);
 482 }
 483
 484 static int
 485 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 486 {
 487         int i;
 488
 489         for (i = 0; i < 3; i++) {
 490                 if (!type || !type[i])
 491                         break;
 492
 493 #define CHECK_SET_TYPE(bit)             \
 494 do {                                    \
 495         if (attr->bp_type & bit)        \
 496                 return -EINVAL;         \
 497         else                            \
 498                 attr->bp_type |= bit;   \
 499 } while (0)
 500
 501                 switch (type[i]) {
 502                 case 'r':
 503                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 504                         break;
 505                 case 'w':
 506                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 507                         break;
 508                 case 'x':
 509                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 510                         break;
 511                 default:
 512                         return -EINVAL;
 513                 }
 514         }
 515
 516 #undef CHECK_SET_TYPE
 517
 518         if (!attr->bp_type) /* Default */
 519                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 520
 521         return 0;
 522 }
 523
 524 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 525                                 void *ptr, char *type, u64 len)
 526 {
 527         struct perf_event_attr attr;
 528
 529         memset(&attr, 0, sizeof(attr));
 530         attr.bp_addr = (unsigned long) ptr;
 531
 532         if (parse_breakpoint_type(type, &attr))
 533                 return -EINVAL;
 534
 535         /* Provide some defaults if len is not specified */
 536         if (!len) {
 537                 if (attr.bp_type == HW_BREAKPOINT_X)
 538                         len = sizeof(long);
 539                 else
 540                         len = HW_BREAKPOINT_LEN_4;
 541         }
 542
 543         attr.bp_len = len;
 544
 545         attr.type = PERF_TYPE_BREAKPOINT;
 546         attr.sample_period = 1;
 547
 548         return add_event(list, idx, &attr, NULL, NULL);
 549 }
 550
 551 static int check_type_val(struct parse_events_term *term,
 552                           struct parse_events_error *err,
 553                           int type)
 554 {
 555         if (type == term->type_val)
 556                 return 0;
 557
 558         if (err) {
 559                 err->idx = term->err_val;
 560                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 561                         err->str = strdup("expected numeric value");
 562                 else
 563                         err->str = strdup("expected string value");
 564         }
 565         return -EINVAL;
 566 }
 567
 568 static int config_term(struct perf_event_attr *attr,
 569                        struct parse_events_term *term,
 570                        struct parse_events_error *err)
 571 {
 572 #define CHECK_TYPE_VAL(type)                                               \
 573 do {                                                                       \
 574         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 575                 return -EINVAL;                                            \
 576 } while (0)
 577
 578         switch (term->type_term) {
 579         case PARSE_EVENTS__TERM_TYPE_USER:
 580                 /*
 581                  * Always succeed for sysfs terms, as we dont know
 582                  * at this point what type they need to have.
 583                  */
 584                 return 0;
 585         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 586                 CHECK_TYPE_VAL(NUM);
 587                 attr->config = term->val.num;
 588                 break;
 589         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 590                 CHECK_TYPE_VAL(NUM);
 591                 attr->config1 = term->val.num;
 592                 break;
 593         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 594                 CHECK_TYPE_VAL(NUM);
 595                 attr->config2 = term->val.num;
 596                 break;
 597         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 598                 CHECK_TYPE_VAL(NUM);
 599                 break;
 600         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 601                 CHECK_TYPE_VAL(NUM);
 602                 break;
 603         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 604                 /*
 605                  * TODO uncomment when the field is available
 606                  * attr->branch_sample_type = term->val.num;
 607                  */
 608                 break;
 609         case PARSE_EVENTS__TERM_TYPE_TIME:
 610                 CHECK_TYPE_VAL(NUM);
 611                 if (term->val.num > 1) {
 612                         err->str = strdup("expected 0 or 1");
 613                         err->idx = term->err_val;
 614                         return -EINVAL;
 615                 }
 616                 break;
 617         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 618                 CHECK_TYPE_VAL(STR);
 619                 break;
 620         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 621                 CHECK_TYPE_VAL(NUM);
 622                 break;
 623         case PARSE_EVENTS__TERM_TYPE_NAME:
 624                 CHECK_TYPE_VAL(STR);
 625                 break;
 626         default:
 627                 return -EINVAL;
 628         }
 629
 630         return 0;
 631 #undef CHECK_TYPE_VAL
 632 }
 633
 634 static int config_attr(struct perf_event_attr *attr,
 635                        struct list_head *head,
 636                        struct parse_events_error *err)
 637 {
 638         struct parse_events_term *term;
 639
 640         list_for_each_entry(term, head, list)
 641                 if (config_term(attr, term, err))
 642                         return -EINVAL;
 643
 644         return 0;
 645 }
 646
 647 static int get_config_terms(struct list_head *head_config,
 648                             struct list_head *head_terms __maybe_unused)
 649 {
 650 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
 651 do {                                                            \
 652         struct perf_evsel_config_term *__t;                     \
 653                                                                 \
 654         __t = zalloc(sizeof(*__t));                             \
 655         if (!__t)                                               \
 656                 return -ENOMEM;                                 \
 657                                                                 \
 658         INIT_LIST_HEAD(&__t->list);                             \
 659         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
 660         __t->val.__name = __val;                                \
 661         list_add_tail(&__t->list, head_terms);                  \
 662 } while (0)
 663
 664         struct parse_events_term *term;
 665
 666         list_for_each_entry(term, head_config, list) {
 667                 switch (term->type_term) {
 668                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 669                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
 670                         break;
 671                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 672                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
 673                         break;
 674                 case PARSE_EVENTS__TERM_TYPE_TIME:
 675                         ADD_CONFIG_TERM(TIME, time, term->val.num);
 676                         break;
 677                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 678                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
 679                         break;
 680                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 681                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
 682                         break;
 683                 default:
 684                         break;
 685                 }
 686         }
 687 #undef ADD_EVSEL_CONFIG
 688         return 0;
 689 }
 690
 691 int parse_events_add_numeric(struct parse_events_evlist *data,
 692                              struct list_head *list,
 693                              u32 type, u64 config,
 694                              struct list_head *head_config)
 695 {
 696         struct perf_event_attr attr;
 697         LIST_HEAD(config_terms);
 698
 699         memset(&attr, 0, sizeof(attr));
 700         attr.type = type;
 701         attr.config = config;
 702
 703         if (head_config) {
 704                 if (config_attr(&attr, head_config, data->error))
 705                         return -EINVAL;
 706
 707                 if (get_config_terms(head_config, &config_terms))
 708                         return -ENOMEM;
 709         }
 710
 711         return add_event(list, &data->idx, &attr, NULL, &config_terms);
 712 }
 713
 714 static int parse_events__is_name_term(struct parse_events_term *term)
 715 {
 716         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 717 }
 718
 719 static char *pmu_event_name(struct list_head *head_terms)
 720 {
 721         struct parse_events_term *term;
 722
 723         list_for_each_entry(term, head_terms, list)
 724                 if (parse_events__is_name_term(term))
 725                         return term->val.str;
 726
 727         return NULL;
 728 }
 729
 730 int parse_events_add_pmu(struct parse_events_evlist *data,
 731                          struct list_head *list, char *name,
 732                          struct list_head *head_config)
 733 {
 734         struct perf_event_attr attr;
 735         struct perf_pmu_info info;
 736         struct perf_pmu *pmu;
 737         struct perf_evsel *evsel;
 738         LIST_HEAD(config_terms);
 739
 740         pmu = perf_pmu__find(name);
 741         if (!pmu)
 742                 return -EINVAL;
 743
 744         if (pmu->default_config) {
 745                 memcpy(&attr, pmu->default_config,
 746                        sizeof(struct perf_event_attr));
 747         } else {
 748                 memset(&attr, 0, sizeof(attr));
 749         }
 750
 751         if (!head_config) {
 752                 attr.type = pmu->type;
 753                 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
 754                 return evsel ? 0 : -ENOMEM;
 755         }
 756
 757         if (perf_pmu__check_alias(pmu, head_config, &info))
 758                 return -EINVAL;
 759
 760         /*
 761          * Configure hardcoded terms first, no need to check
 762          * return value when called with fail == 0 ;)
 763          */
 764         if (config_attr(&attr, head_config, data->error))
 765                 return -EINVAL;
 766
 767         if (get_config_terms(head_config, &config_terms))
 768                 return -ENOMEM;
 769
 770         if (perf_pmu__config(pmu, &attr, head_config, data->error))
 771                 return -EINVAL;
 772
 773         evsel = __add_event(list, &data->idx, &attr,
 774                             pmu_event_name(head_config), pmu->cpus,
 775                             &config_terms);
 776         if (evsel) {
 777                 evsel->unit = info.unit;
 778                 evsel->scale = info.scale;
 779                 evsel->per_pkg = info.per_pkg;
 780                 evsel->snapshot = info.snapshot;
 781         }
 782
 783         return evsel ? 0 : -ENOMEM;
 784 }
 785
 786 int parse_events__modifier_group(struct list_head *list,
 787                                  char *event_mod)
 788 {
 789         return parse_events__modifier_event(list, event_mod, true);
 790 }
 791
 792 void parse_events__set_leader(char *name, struct list_head *list)
 793 {
 794         struct perf_evsel *leader;
 795
 796         __perf_evlist__set_leader(list);
 797         leader = list_entry(list->next, struct perf_evsel, node);
 798         leader->group_name = name ? strdup(name) : NULL;
 799 }
 800
 801 /* list_event is assumed to point to malloc'ed memory */
 802 void parse_events_update_lists(struct list_head *list_event,
 803                                struct list_head *list_all)
 804 {
 805         /*
 806          * Called for single event definition. Update the
 807          * 'all event' list, and reinit the 'single event'
 808          * list, for next event definition.
 809          */
 810         list_splice_tail(list_event, list_all);
 811         free(list_event);
 812 }
 813
 814 struct event_modifier {
 815         int eu;
 816         int ek;
 817         int eh;
 818         int eH;
 819         int eG;
 820         int eI;
 821         int precise;
 822         int exclude_GH;
 823         int sample_read;
 824         int pinned;
 825 };
 826
 827 static int get_event_modifier(struct event_modifier *mod, char *str,
 828                                struct perf_evsel *evsel)
 829 {
 830         int eu = evsel ? evsel->attr.exclude_user : 0;
 831         int ek = evsel ? evsel->attr.exclude_kernel : 0;
 832         int eh = evsel ? evsel->attr.exclude_hv : 0;
 833         int eH = evsel ? evsel->attr.exclude_host : 0;
 834         int eG = evsel ? evsel->attr.exclude_guest : 0;
 835         int eI = evsel ? evsel->attr.exclude_idle : 0;
 836         int precise = evsel ? evsel->attr.precise_ip : 0;
 837         int sample_read = 0;
 838         int pinned = evsel ? evsel->attr.pinned : 0;
 839
 840         int exclude = eu | ek | eh;
 841         int exclude_GH = evsel ? evsel->exclude_GH : 0;
 842
 843         memset(mod, 0, sizeof(*mod));
 844
 845         while (*str) {
 846                 if (*str == 'u') {
 847                         if (!exclude)
 848                                 exclude = eu = ek = eh = 1;
 849                         eu = 0;
 850                 } else if (*str == 'k') {
 851                         if (!exclude)
 852                                 exclude = eu = ek = eh = 1;
 853                         ek = 0;
 854                 } else if (*str == 'h') {
 855                         if (!exclude)
 856                                 exclude = eu = ek = eh = 1;
 857                         eh = 0;
 858                 } else if (*str == 'G') {
 859                         if (!exclude_GH)
 860                                 exclude_GH = eG = eH = 1;
 861                         eG = 0;
 862                 } else if (*str == 'H') {
 863                         if (!exclude_GH)
 864                                 exclude_GH = eG = eH = 1;
 865                         eH = 0;
 866                 } else if (*str == 'I') {
 867                         eI = 1;
 868                 } else if (*str == 'p') {
 869                         precise++;
 870                         /* use of precise requires exclude_guest */
 871                         if (!exclude_GH)
 872                                 eG = 1;
 873                 } else if (*str == 'S') {
 874                         sample_read = 1;
 875                 } else if (*str == 'D') {
 876                         pinned = 1;
 877                 } else
 878                         break;
 879
 880                 ++str;
 881         }
 882
 883         /*
 884          * precise ip:
 885          *
 886          *  0 - SAMPLE_IP can have arbitrary skid
 887          *  1 - SAMPLE_IP must have constant skid
 888          *  2 - SAMPLE_IP requested to have 0 skid
 889          *  3 - SAMPLE_IP must have 0 skid
 890          *
 891          *  See also PERF_RECORD_MISC_EXACT_IP
 892          */
 893         if (precise > 3)
 894                 return -EINVAL;
 895
 896         mod->eu = eu;
 897         mod->ek = ek;
 898         mod->eh = eh;
 899         mod->eH = eH;
 900         mod->eG = eG;
 901         mod->eI = eI;
 902         mod->precise = precise;
 903         mod->exclude_GH = exclude_GH;
 904         mod->sample_read = sample_read;
 905         mod->pinned = pinned;
 906
 907         return 0;
 908 }
 909
 910 /*
 911  * Basic modifier sanity check to validate it contains only one
 912  * instance of any modifier (apart from 'p') present.
 913  */
 914 static int check_modifier(char *str)
 915 {
 916         char *p = str;
 917
 918         /* The sizeof includes 0 byte as well. */
 919         if (strlen(str) > (sizeof("ukhGHpppSDI") - 1))
 920                 return -1;
 921
 922         while (*p) {
 923                 if (*p != 'p' && strchr(p + 1, *p))
 924                         return -1;
 925                 p++;
 926         }
 927
 928         return 0;
 929 }
 930
 931 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
 932 {
 933         struct perf_evsel *evsel;
 934         struct event_modifier mod;
 935
 936         if (str == NULL)
 937                 return 0;
 938
 939         if (check_modifier(str))
 940                 return -EINVAL;
 941
 942         if (!add && get_event_modifier(&mod, str, NULL))
 943                 return -EINVAL;
 944
 945         __evlist__for_each(list, evsel) {
 946                 if (add && get_event_modifier(&mod, str, evsel))
 947                         return -EINVAL;
 948
 949                 evsel->attr.exclude_user   = mod.eu;
 950                 evsel->attr.exclude_kernel = mod.ek;
 951                 evsel->attr.exclude_hv     = mod.eh;
 952                 evsel->attr.precise_ip     = mod.precise;
 953                 evsel->attr.exclude_host   = mod.eH;
 954                 evsel->attr.exclude_guest  = mod.eG;
 955                 evsel->attr.exclude_idle   = mod.eI;
 956                 evsel->exclude_GH          = mod.exclude_GH;
 957                 evsel->sample_read         = mod.sample_read;
 958
 959                 if (perf_evsel__is_group_leader(evsel))
 960                         evsel->attr.pinned = mod.pinned;
 961         }
 962
 963         return 0;
 964 }
 965
 966 int parse_events_name(struct list_head *list, char *name)
 967 {
 968         struct perf_evsel *evsel;
 969
 970         __evlist__for_each(list, evsel) {
 971                 if (!evsel->name)
 972                         evsel->name = strdup(name);
 973         }
 974
 975         return 0;
 976 }
 977
 978 static int
 979 comp_pmu(const void *p1, const void *p2)
 980 {
 981         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
 982         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
 983
 984         return strcmp(pmu1->symbol, pmu2->symbol);
 985 }
 986
 987 static void perf_pmu__parse_cleanup(void)
 988 {
 989         if (perf_pmu_events_list_num > 0) {
 990                 struct perf_pmu_event_symbol *p;
 991                 int i;
 992
 993                 for (i = 0; i < perf_pmu_events_list_num; i++) {
 994                         p = perf_pmu_events_list + i;
 995                         free(p->symbol);
 996                 }
 997                 free(perf_pmu_events_list);
 998                 perf_pmu_events_list = NULL;
 999                 perf_pmu_events_list_num = 0;
1000         }
1001 }
1002
1003 #define SET_SYMBOL(str, stype)          \
1004 do {                                    \
1005         p->symbol = str;                \
1006         if (!p->symbol)                 \
1007                 goto err;               \
1008         p->type = stype;                \
1009 } while (0)
1010
1011 /*
1012  * Read the pmu events list from sysfs
1013  * Save it into perf_pmu_events_list
1014  */
1015 static void perf_pmu__parse_init(void)
1016 {
1017
1018         struct perf_pmu *pmu = NULL;
1019         struct perf_pmu_alias *alias;
1020         int len = 0;
1021
1022         pmu = perf_pmu__find("cpu");
1023         if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1024                 perf_pmu_events_list_num = -1;
1025                 return;
1026         }
1027         list_for_each_entry(alias, &pmu->aliases, list) {
1028                 if (strchr(alias->name, '-'))
1029                         len++;
1030                 len++;
1031         }
1032         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1033         if (!perf_pmu_events_list)
1034                 return;
1035         perf_pmu_events_list_num = len;
1036
1037         len = 0;
1038         list_for_each_entry(alias, &pmu->aliases, list) {
1039                 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1040                 char *tmp = strchr(alias->name, '-');
1041
1042                 if (tmp != NULL) {
1043                         SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1044                                         PMU_EVENT_SYMBOL_PREFIX);
1045                         p++;
1046                         SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1047                         len += 2;
1048                 } else {
1049                         SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1050                         len++;
1051                 }
1052         }
1053         qsort(perf_pmu_events_list, len,
1054                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1055
1056         return;
1057 err:
1058         perf_pmu__parse_cleanup();
1059 }
1060
1061 enum perf_pmu_event_symbol_type
1062 perf_pmu__parse_check(const char *name)
1063 {
1064         struct perf_pmu_event_symbol p, *r;
1065
1066         /* scan kernel pmu events from sysfs if needed */
1067         if (perf_pmu_events_list_num == 0)
1068                 perf_pmu__parse_init();
1069         /*
1070          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1071          * cpu-cycles has been handled by hardcode.
1072          * So it must be cpu// events, not kernel pmu event.
1073          */
1074         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1075                 return PMU_EVENT_SYMBOL_ERR;
1076
1077         p.symbol = strdup(name);
1078         r = bsearch(&p, perf_pmu_events_list,
1079                         (size_t) perf_pmu_events_list_num,
1080                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1081         free(p.symbol);
1082         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1083 }
1084
1085 static int parse_events__scanner(const char *str, void *data, int start_token)
1086 {
1087         YY_BUFFER_STATE buffer;
1088         void *scanner;
1089         int ret;
1090
1091         ret = parse_events_lex_init_extra(start_token, &scanner);
1092         if (ret)
1093                 return ret;
1094
1095         buffer = parse_events__scan_string(str, scanner);
1096
1097 #ifdef PARSER_DEBUG
1098         parse_events_debug = 1;
1099 #endif
1100         ret = parse_events_parse(data, scanner);
1101
1102         parse_events__flush_buffer(buffer, scanner);
1103         parse_events__delete_buffer(buffer, scanner);
1104         parse_events_lex_destroy(scanner);
1105         return ret;
1106 }
1107
1108 /*
1109  * parse event config string, return a list of event terms.
1110  */
1111 int parse_events_terms(struct list_head *terms, const char *str)
1112 {
1113         struct parse_events_terms data = {
1114                 .terms = NULL,
1115         };
1116         int ret;
1117
1118         ret = parse_events__scanner(str, &data, PE_START_TERMS);
1119         if (!ret) {
1120                 list_splice(data.terms, terms);
1121                 zfree(&data.terms);
1122                 return 0;
1123         }
1124
1125         if (data.terms)
1126                 parse_events__free_terms(data.terms);
1127         return ret;
1128 }
1129
1130 int parse_events(struct perf_evlist *evlist, const char *str,
1131                  struct parse_events_error *err)
1132 {
1133         struct parse_events_evlist data = {
1134                 .list  = LIST_HEAD_INIT(data.list),
1135                 .idx   = evlist->nr_entries,
1136                 .error = err,
1137         };
1138         int ret;
1139
1140         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1141         perf_pmu__parse_cleanup();
1142         if (!ret) {
1143                 struct perf_evsel *last;
1144
1145                 perf_evlist__splice_list_tail(evlist, &data.list);
1146                 evlist->nr_groups += data.nr_groups;
1147                 last = perf_evlist__last(evlist);
1148                 last->cmdline_group_boundary = true;
1149
1150                 return 0;
1151         }
1152
1153         /*
1154          * There are 2 users - builtin-record and builtin-test objects.
1155          * Both call perf_evlist__delete in case of error, so we dont
1156          * need to bother.
1157          */
1158         return ret;
1159 }
1160
1161 #define MAX_WIDTH 1000
1162 static int get_term_width(void)
1163 {
1164         struct winsize ws;
1165
1166         get_term_dimensions(&ws);
1167         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1168 }
1169
1170 static void parse_events_print_error(struct parse_events_error *err,
1171                                      const char *event)
1172 {
1173         const char *str = "invalid or unsupported event: ";
1174         char _buf[MAX_WIDTH];
1175         char *buf = (char *) event;
1176         int idx = 0;
1177
1178         if (err->str) {
1179                 /* -2 for extra '' in the final fprintf */
1180                 int width       = get_term_width() - 2;
1181                 int len_event   = strlen(event);
1182                 int len_str, max_len, cut = 0;
1183
1184                 /*
1185                  * Maximum error index indent, we will cut
1186                  * the event string if it's bigger.
1187                  */
1188                 int max_err_idx = 13;
1189
1190                 /*
1191                  * Let's be specific with the message when
1192                  * we have the precise error.
1193                  */
1194                 str     = "event syntax error: ";
1195                 len_str = strlen(str);
1196                 max_len = width - len_str;
1197
1198                 buf = _buf;
1199
1200                 /* We're cutting from the beggining. */
1201                 if (err->idx > max_err_idx)
1202                         cut = err->idx - max_err_idx;
1203
1204                 strncpy(buf, event + cut, max_len);
1205
1206                 /* Mark cut parts with '..' on both sides. */
1207                 if (cut)
1208                         buf[0] = buf[1] = '.';
1209
1210                 if ((len_event - cut) > max_len) {
1211                         buf[max_len - 1] = buf[max_len - 2] = '.';
1212                         buf[max_len] = 0;
1213                 }
1214
1215                 idx = len_str + err->idx - cut;
1216         }
1217
1218         fprintf(stderr, "%s'%s'\n", str, buf);
1219         if (idx) {
1220                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1221                 if (err->help)
1222                         fprintf(stderr, "\n%s\n", err->help);
1223                 free(err->str);
1224                 free(err->help);
1225         }
1226
1227         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1228 }
1229
1230 #undef MAX_WIDTH
1231
1232 int parse_events_option(const struct option *opt, const char *str,
1233                         int unset __maybe_unused)
1234 {
1235         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1236         struct parse_events_error err = { .idx = 0, };
1237         int ret = parse_events(evlist, str, &err);
1238
1239         if (ret)
1240                 parse_events_print_error(&err, str);
1241
1242         return ret;
1243 }
1244
1245 static int
1246 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1247                            int (*func)(struct perf_evsel *evsel,
1248                                        const void *arg),
1249                            const void *arg)
1250 {
1251         struct perf_evsel *last = NULL;
1252         int err;
1253
1254         if (evlist->nr_entries > 0)
1255                 last = perf_evlist__last(evlist);
1256
1257         do {
1258                 err = (*func)(last, arg);
1259                 if (err)
1260                         return -1;
1261                 if (!last)
1262                         return 0;
1263
1264                 if (last->node.prev == &evlist->entries)
1265                         return 0;
1266                 last = list_entry(last->node.prev, struct perf_evsel, node);
1267         } while (!last->cmdline_group_boundary);
1268
1269         return 0;
1270 }
1271
1272 static int set_filter(struct perf_evsel *evsel, const void *arg)
1273 {
1274         const char *str = arg;
1275
1276         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1277                 fprintf(stderr,
1278                         "--filter option should follow a -e tracepoint option\n");
1279                 return -1;
1280         }
1281
1282         if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1283                 fprintf(stderr,
1284                         "not enough memory to hold filter string\n");
1285                 return -1;
1286         }
1287
1288         return 0;
1289 }
1290
1291 int parse_filter(const struct option *opt, const char *str,
1292                  int unset __maybe_unused)
1293 {
1294         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1295
1296         return foreach_evsel_in_last_glob(evlist, set_filter,
1297                                           (const void *)str);
1298 }
1299
1300 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1301                                    const void *arg __maybe_unused)
1302 {
1303         char new_filter[64];
1304
1305         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1306                 fprintf(stderr,
1307                         "--exclude-perf option should follow a -e tracepoint option\n");
1308                 return -1;
1309         }
1310
1311         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1312
1313         if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1314                 fprintf(stderr,
1315                         "not enough memory to hold filter string\n");
1316                 return -1;
1317         }
1318
1319         return 0;
1320 }
1321
1322 int exclude_perf(const struct option *opt,
1323                  const char *arg __maybe_unused,
1324                  int unset __maybe_unused)
1325 {
1326         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1327
1328         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1329                                           NULL);
1330 }
1331
1332 static const char * const event_type_descriptors[] = {
1333         "Hardware event",
1334         "Software event",
1335         "Tracepoint event",
1336         "Hardware cache event",
1337         "Raw hardware event descriptor",
1338         "Hardware breakpoint",
1339 };
1340
1341 static int cmp_string(const void *a, const void *b)
1342 {
1343         const char * const *as = a;
1344         const char * const *bs = b;
1345
1346         return strcmp(*as, *bs);
1347 }
1348
1349 /*
1350  * Print the events from <debugfs_mount_point>/tracing/events
1351  */
1352
1353 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1354                              bool name_only)
1355 {
1356         DIR *sys_dir, *evt_dir;
1357         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1358         char evt_path[MAXPATHLEN];
1359         char dir_path[MAXPATHLEN];
1360         char **evt_list = NULL;
1361         unsigned int evt_i = 0, evt_num = 0;
1362         bool evt_num_known = false;
1363
1364 restart:
1365         sys_dir = opendir(tracing_events_path);
1366         if (!sys_dir)
1367                 return;
1368
1369         if (evt_num_known) {
1370                 evt_list = zalloc(sizeof(char *) * evt_num);
1371                 if (!evt_list)
1372                         goto out_close_sys_dir;
1373         }
1374
1375         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1376                 if (subsys_glob != NULL &&
1377                     !strglobmatch(sys_dirent.d_name, subsys_glob))
1378                         continue;
1379
1380                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1381                          sys_dirent.d_name);
1382                 evt_dir = opendir(dir_path);
1383                 if (!evt_dir)
1384                         continue;
1385
1386                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1387                         if (event_glob != NULL &&
1388                             !strglobmatch(evt_dirent.d_name, event_glob))
1389                                 continue;
1390
1391                         if (!evt_num_known) {
1392                                 evt_num++;
1393                                 continue;
1394                         }
1395
1396                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1397                                  sys_dirent.d_name, evt_dirent.d_name);
1398
1399                         evt_list[evt_i] = strdup(evt_path);
1400                         if (evt_list[evt_i] == NULL)
1401                                 goto out_close_evt_dir;
1402                         evt_i++;
1403                 }
1404                 closedir(evt_dir);
1405         }
1406         closedir(sys_dir);
1407
1408         if (!evt_num_known) {
1409                 evt_num_known = true;
1410                 goto restart;
1411         }
1412         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1413         evt_i = 0;
1414         while (evt_i < evt_num) {
1415                 if (name_only) {
1416                         printf("%s ", evt_list[evt_i++]);
1417                         continue;
1418                 }
1419                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1420                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1421         }
1422         if (evt_num)
1423                 printf("\n");
1424
1425 out_free:
1426         evt_num = evt_i;
1427         for (evt_i = 0; evt_i < evt_num; evt_i++)
1428                 zfree(&evt_list[evt_i]);
1429         zfree(&evt_list);
1430         return;
1431
1432 out_close_evt_dir:
1433         closedir(evt_dir);
1434 out_close_sys_dir:
1435         closedir(sys_dir);
1436
1437         printf("FATAL: not enough memory to print %s\n",
1438                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1439         if (evt_list)
1440                 goto out_free;
1441 }
1442
1443 /*
1444  * Check whether event is in <debugfs_mount_point>/tracing/events
1445  */
1446
1447 int is_valid_tracepoint(const char *event_string)
1448 {
1449         DIR *sys_dir, *evt_dir;
1450         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1451         char evt_path[MAXPATHLEN];
1452         char dir_path[MAXPATHLEN];
1453
1454         sys_dir = opendir(tracing_events_path);
1455         if (!sys_dir)
1456                 return 0;
1457
1458         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1459
1460                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1461                          sys_dirent.d_name);
1462                 evt_dir = opendir(dir_path);
1463                 if (!evt_dir)
1464                         continue;
1465
1466                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1467                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1468                                  sys_dirent.d_name, evt_dirent.d_name);
1469                         if (!strcmp(evt_path, event_string)) {
1470                                 closedir(evt_dir);
1471                                 closedir(sys_dir);
1472                                 return 1;
1473                         }
1474                 }
1475                 closedir(evt_dir);
1476         }
1477         closedir(sys_dir);
1478         return 0;
1479 }
1480
1481 static bool is_event_supported(u8 type, unsigned config)
1482 {
1483         bool ret = true;
1484         int open_return;
1485         struct perf_evsel *evsel;
1486         struct perf_event_attr attr = {
1487                 .type = type,
1488                 .config = config,
1489                 .disabled = 1,
1490         };
1491         struct {
1492                 struct thread_map map;
1493                 int threads[1];
1494         } tmap = {
1495                 .map.nr  = 1,
1496                 .threads = { 0 },
1497         };
1498
1499         evsel = perf_evsel__new(&attr);
1500         if (evsel) {
1501                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1502                 ret = open_return >= 0;
1503
1504                 if (open_return == -EACCES) {
1505                         /*
1506                          * This happens if the paranoid value
1507                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1508                          * Re-run with exclude_kernel set; we don't do that
1509                          * by default as some ARM machines do not support it.
1510                          *
1511                          */
1512                         evsel->attr.exclude_kernel = 1;
1513                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1514                 }
1515                 perf_evsel__delete(evsel);
1516         }
1517
1518         return ret;
1519 }
1520
1521 int print_hwcache_events(const char *event_glob, bool name_only)
1522 {
1523         unsigned int type, op, i, evt_i = 0, evt_num = 0;
1524         char name[64];
1525         char **evt_list = NULL;
1526         bool evt_num_known = false;
1527
1528 restart:
1529         if (evt_num_known) {
1530                 evt_list = zalloc(sizeof(char *) * evt_num);
1531                 if (!evt_list)
1532                         goto out_enomem;
1533         }
1534
1535         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1536                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1537                         /* skip invalid cache type */
1538                         if (!perf_evsel__is_cache_op_valid(type, op))
1539                                 continue;
1540
1541                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1542                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1543                                                                         name, sizeof(name));
1544                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1545                                         continue;
1546
1547                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1548                                                         type | (op << 8) | (i << 16)))
1549                                         continue;
1550
1551                                 if (!evt_num_known) {
1552                                         evt_num++;
1553                                         continue;
1554                                 }
1555
1556                                 evt_list[evt_i] = strdup(name);
1557                                 if (evt_list[evt_i] == NULL)
1558                                         goto out_enomem;
1559                                 evt_i++;
1560                         }
1561                 }
1562         }
1563
1564         if (!evt_num_known) {
1565                 evt_num_known = true;
1566                 goto restart;
1567         }
1568         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1569         evt_i = 0;
1570         while (evt_i < evt_num) {
1571                 if (name_only) {
1572                         printf("%s ", evt_list[evt_i++]);
1573                         continue;
1574                 }
1575                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1576                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1577         }
1578         if (evt_num)
1579                 printf("\n");
1580
1581 out_free:
1582         evt_num = evt_i;
1583         for (evt_i = 0; evt_i < evt_num; evt_i++)
1584                 zfree(&evt_list[evt_i]);
1585         zfree(&evt_list);
1586         return evt_num;
1587
1588 out_enomem:
1589         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1590         if (evt_list)
1591                 goto out_free;
1592         return evt_num;
1593 }
1594
1595 void print_symbol_events(const char *event_glob, unsigned type,
1596                                 struct event_symbol *syms, unsigned max,
1597                                 bool name_only)
1598 {
1599         unsigned int i, evt_i = 0, evt_num = 0;
1600         char name[MAX_NAME_LEN];
1601         char **evt_list = NULL;
1602         bool evt_num_known = false;
1603
1604 restart:
1605         if (evt_num_known) {
1606                 evt_list = zalloc(sizeof(char *) * evt_num);
1607                 if (!evt_list)
1608                         goto out_enomem;
1609                 syms -= max;
1610         }
1611
1612         for (i = 0; i < max; i++, syms++) {
1613
1614                 if (event_glob != NULL &&
1615                     !(strglobmatch(syms->symbol, event_glob) ||
1616                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1617                         continue;
1618
1619                 if (!is_event_supported(type, i))
1620                         continue;
1621
1622                 if (!evt_num_known) {
1623                         evt_num++;
1624                         continue;
1625                 }
1626
1627                 if (!name_only && strlen(syms->alias))
1628                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1629                 else
1630                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1631
1632                 evt_list[evt_i] = strdup(name);
1633                 if (evt_list[evt_i] == NULL)
1634                         goto out_enomem;
1635                 evt_i++;
1636         }
1637
1638         if (!evt_num_known) {
1639                 evt_num_known = true;
1640                 goto restart;
1641         }
1642         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1643         evt_i = 0;
1644         while (evt_i < evt_num) {
1645                 if (name_only) {
1646                         printf("%s ", evt_list[evt_i++]);
1647                         continue;
1648                 }
1649                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1650         }
1651         if (evt_num)
1652                 printf("\n");
1653
1654 out_free:
1655         evt_num = evt_i;
1656         for (evt_i = 0; evt_i < evt_num; evt_i++)
1657                 zfree(&evt_list[evt_i]);
1658         zfree(&evt_list);
1659         return;
1660
1661 out_enomem:
1662         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1663         if (evt_list)
1664                 goto out_free;
1665 }
1666
1667 /*
1668  * Print the help text for the event symbols:
1669  */
1670 void print_events(const char *event_glob, bool name_only)
1671 {
1672         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1673                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1674
1675         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1676                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1677
1678         print_hwcache_events(event_glob, name_only);
1679
1680         print_pmu_events(event_glob, name_only);
1681
1682         if (event_glob != NULL)
1683                 return;
1684
1685         if (!name_only) {
1686                 printf("  %-50s [%s]\n",
1687                        "rNNN",
1688                        event_type_descriptors[PERF_TYPE_RAW]);
1689                 printf("  %-50s [%s]\n",
1690                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1691                        event_type_descriptors[PERF_TYPE_RAW]);
1692                 printf("   (see 'man perf-list' on how to encode it)\n");
1693                 printf("\n");
1694
1695                 printf("  %-50s [%s]\n",
1696                        "mem:<addr>[/len][:access]",
1697                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1698                 printf("\n");
1699         }
1700
1701         print_tracepoint_events(NULL, NULL, name_only);
1702 }
1703
1704 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1705 {
1706         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1707 }
1708
1709 static int new_term(struct parse_events_term **_term, int type_val,
1710                     int type_term, char *config,
1711                     char *str, u64 num, int err_term, int err_val)
1712 {
1713         struct parse_events_term *term;
1714
1715         term = zalloc(sizeof(*term));
1716         if (!term)
1717                 return -ENOMEM;
1718
1719         INIT_LIST_HEAD(&term->list);
1720         term->type_val  = type_val;
1721         term->type_term = type_term;
1722         term->config = config;
1723         term->err_term = err_term;
1724         term->err_val  = err_val;
1725
1726         switch (type_val) {
1727         case PARSE_EVENTS__TERM_TYPE_NUM:
1728                 term->val.num = num;
1729                 break;
1730         case PARSE_EVENTS__TERM_TYPE_STR:
1731                 term->val.str = str;
1732                 break;
1733         default:
1734                 free(term);
1735                 return -EINVAL;
1736         }
1737
1738         *_term = term;
1739         return 0;
1740 }
1741
1742 int parse_events_term__num(struct parse_events_term **term,
1743                            int type_term, char *config, u64 num,
1744                            void *loc_term_, void *loc_val_)
1745 {
1746         YYLTYPE *loc_term = loc_term_;
1747         YYLTYPE *loc_val = loc_val_;
1748
1749         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1750                         config, NULL, num,
1751                         loc_term ? loc_term->first_column : 0,
1752                         loc_val ? loc_val->first_column : 0);
1753 }
1754
1755 int parse_events_term__str(struct parse_events_term **term,
1756                            int type_term, char *config, char *str,
1757                            void *loc_term_, void *loc_val_)
1758 {
1759         YYLTYPE *loc_term = loc_term_;
1760         YYLTYPE *loc_val = loc_val_;
1761
1762         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1763                         config, str, 0,
1764                         loc_term ? loc_term->first_column : 0,
1765                         loc_val ? loc_val->first_column : 0);
1766 }
1767
1768 int parse_events_term__sym_hw(struct parse_events_term **term,
1769                               char *config, unsigned idx)
1770 {
1771         struct event_symbol *sym;
1772
1773         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1774         sym = &event_symbols_hw[idx];
1775
1776         if (config)
1777                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1778                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1779                                 (char *) sym->symbol, 0, 0, 0);
1780         else
1781                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1782                                 PARSE_EVENTS__TERM_TYPE_USER,
1783                                 (char *) "event", (char *) sym->symbol,
1784                                 0, 0, 0);
1785 }
1786
1787 int parse_events_term__clone(struct parse_events_term **new,
1788                              struct parse_events_term *term)
1789 {
1790         return new_term(new, term->type_val, term->type_term, term->config,
1791                         term->val.str, term->val.num,
1792                         term->err_term, term->err_val);
1793 }
1794
1795 void parse_events__free_terms(struct list_head *terms)
1796 {
1797         struct parse_events_term *term, *h;
1798
1799         list_for_each_entry_safe(term, h, terms, list)
1800                 free(term);
1801 }
1802
1803 void parse_events_evlist_error(struct parse_events_evlist *data,
1804                                int idx, const char *str)
1805 {
1806         struct parse_events_error *err = data->error;
1807
1808         if (!err)
1809                 return;
1810         err->idx = idx;
1811         err->str = strdup(str);
1812         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
1813 }