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         if (cpus)
 291                 evsel->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_BRANCH_SAMPLE_TYPE:
 601                 /*
 602                  * TODO uncomment when the field is available
 603                  * attr->branch_sample_type = term->val.num;
 604                  */
 605                 break;
 606         case PARSE_EVENTS__TERM_TYPE_NAME:
 607                 CHECK_TYPE_VAL(STR);
 608                 break;
 609         default:
 610                 return -EINVAL;
 611         }
 612
 613         return 0;
 614 #undef CHECK_TYPE_VAL
 615 }
 616
 617 static int config_attr(struct perf_event_attr *attr,
 618                        struct list_head *head,
 619                        struct parse_events_error *err)
 620 {
 621         struct parse_events_term *term;
 622
 623         list_for_each_entry(term, head, list)
 624                 if (config_term(attr, term, err))
 625                         return -EINVAL;
 626
 627         return 0;
 628 }
 629
 630 static int get_config_terms(struct list_head *head_config,
 631                             struct list_head *head_terms __maybe_unused)
 632 {
 633 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
 634 do {                                                            \
 635         struct perf_evsel_config_term *__t;                     \
 636                                                                 \
 637         __t = zalloc(sizeof(*__t));                             \
 638         if (!__t)                                               \
 639                 return -ENOMEM;                                 \
 640                                                                 \
 641         INIT_LIST_HEAD(&__t->list);                             \
 642         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
 643         __t->val.__name = __val;                                \
 644         list_add_tail(&__t->list, head_terms);                  \
 645 } while (0)
 646
 647         struct parse_events_term *term;
 648
 649         list_for_each_entry(term, head_config, list) {
 650                 switch (term->type_term) {
 651                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 652                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
 653                 default:
 654                         break;
 655                 }
 656         }
 657 #undef ADD_EVSEL_CONFIG
 658         return 0;
 659 }
 660
 661 int parse_events_add_numeric(struct parse_events_evlist *data,
 662                              struct list_head *list,
 663                              u32 type, u64 config,
 664                              struct list_head *head_config)
 665 {
 666         struct perf_event_attr attr;
 667         LIST_HEAD(config_terms);
 668
 669         memset(&attr, 0, sizeof(attr));
 670         attr.type = type;
 671         attr.config = config;
 672
 673         if (head_config) {
 674                 if (config_attr(&attr, head_config, data->error))
 675                         return -EINVAL;
 676
 677                 if (get_config_terms(head_config, &config_terms))
 678                         return -ENOMEM;
 679         }
 680
 681         return add_event(list, &data->idx, &attr, NULL, &config_terms);
 682 }
 683
 684 static int parse_events__is_name_term(struct parse_events_term *term)
 685 {
 686         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 687 }
 688
 689 static char *pmu_event_name(struct list_head *head_terms)
 690 {
 691         struct parse_events_term *term;
 692
 693         list_for_each_entry(term, head_terms, list)
 694                 if (parse_events__is_name_term(term))
 695                         return term->val.str;
 696
 697         return NULL;
 698 }
 699
 700 int parse_events_add_pmu(struct parse_events_evlist *data,
 701                          struct list_head *list, char *name,
 702                          struct list_head *head_config)
 703 {
 704         struct perf_event_attr attr;
 705         struct perf_pmu_info info;
 706         struct perf_pmu *pmu;
 707         struct perf_evsel *evsel;
 708         LIST_HEAD(config_terms);
 709
 710         pmu = perf_pmu__find(name);
 711         if (!pmu)
 712                 return -EINVAL;
 713
 714         if (pmu->default_config) {
 715                 memcpy(&attr, pmu->default_config,
 716                        sizeof(struct perf_event_attr));
 717         } else {
 718                 memset(&attr, 0, sizeof(attr));
 719         }
 720
 721         if (!head_config) {
 722                 attr.type = pmu->type;
 723                 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
 724                 return evsel ? 0 : -ENOMEM;
 725         }
 726
 727         if (perf_pmu__check_alias(pmu, head_config, &info))
 728                 return -EINVAL;
 729
 730         /*
 731          * Configure hardcoded terms first, no need to check
 732          * return value when called with fail == 0 ;)
 733          */
 734         if (config_attr(&attr, head_config, data->error))
 735                 return -EINVAL;
 736
 737         if (get_config_terms(head_config, &config_terms))
 738                 return -ENOMEM;
 739
 740         if (perf_pmu__config(pmu, &attr, head_config, data->error))
 741                 return -EINVAL;
 742
 743         evsel = __add_event(list, &data->idx, &attr,
 744                             pmu_event_name(head_config), pmu->cpus,
 745                             &config_terms);
 746         if (evsel) {
 747                 evsel->unit = info.unit;
 748                 evsel->scale = info.scale;
 749                 evsel->per_pkg = info.per_pkg;
 750                 evsel->snapshot = info.snapshot;
 751         }
 752
 753         return evsel ? 0 : -ENOMEM;
 754 }
 755
 756 int parse_events__modifier_group(struct list_head *list,
 757                                  char *event_mod)
 758 {
 759         return parse_events__modifier_event(list, event_mod, true);
 760 }
 761
 762 void parse_events__set_leader(char *name, struct list_head *list)
 763 {
 764         struct perf_evsel *leader;
 765
 766         __perf_evlist__set_leader(list);
 767         leader = list_entry(list->next, struct perf_evsel, node);
 768         leader->group_name = name ? strdup(name) : NULL;
 769 }
 770
 771 /* list_event is assumed to point to malloc'ed memory */
 772 void parse_events_update_lists(struct list_head *list_event,
 773                                struct list_head *list_all)
 774 {
 775         /*
 776          * Called for single event definition. Update the
 777          * 'all event' list, and reinit the 'single event'
 778          * list, for next event definition.
 779          */
 780         list_splice_tail(list_event, list_all);
 781         free(list_event);
 782 }
 783
 784 struct event_modifier {
 785         int eu;
 786         int ek;
 787         int eh;
 788         int eH;
 789         int eG;
 790         int eI;
 791         int precise;
 792         int exclude_GH;
 793         int sample_read;
 794         int pinned;
 795 };
 796
 797 static int get_event_modifier(struct event_modifier *mod, char *str,
 798                                struct perf_evsel *evsel)
 799 {
 800         int eu = evsel ? evsel->attr.exclude_user : 0;
 801         int ek = evsel ? evsel->attr.exclude_kernel : 0;
 802         int eh = evsel ? evsel->attr.exclude_hv : 0;
 803         int eH = evsel ? evsel->attr.exclude_host : 0;
 804         int eG = evsel ? evsel->attr.exclude_guest : 0;
 805         int eI = evsel ? evsel->attr.exclude_idle : 0;
 806         int precise = evsel ? evsel->attr.precise_ip : 0;
 807         int sample_read = 0;
 808         int pinned = evsel ? evsel->attr.pinned : 0;
 809
 810         int exclude = eu | ek | eh;
 811         int exclude_GH = evsel ? evsel->exclude_GH : 0;
 812
 813         memset(mod, 0, sizeof(*mod));
 814
 815         while (*str) {
 816                 if (*str == 'u') {
 817                         if (!exclude)
 818                                 exclude = eu = ek = eh = 1;
 819                         eu = 0;
 820                 } else if (*str == 'k') {
 821                         if (!exclude)
 822                                 exclude = eu = ek = eh = 1;
 823                         ek = 0;
 824                 } else if (*str == 'h') {
 825                         if (!exclude)
 826                                 exclude = eu = ek = eh = 1;
 827                         eh = 0;
 828                 } else if (*str == 'G') {
 829                         if (!exclude_GH)
 830                                 exclude_GH = eG = eH = 1;
 831                         eG = 0;
 832                 } else if (*str == 'H') {
 833                         if (!exclude_GH)
 834                                 exclude_GH = eG = eH = 1;
 835                         eH = 0;
 836                 } else if (*str == 'I') {
 837                         eI = 1;
 838                 } else if (*str == 'p') {
 839                         precise++;
 840                         /* use of precise requires exclude_guest */
 841                         if (!exclude_GH)
 842                                 eG = 1;
 843                 } else if (*str == 'S') {
 844                         sample_read = 1;
 845                 } else if (*str == 'D') {
 846                         pinned = 1;
 847                 } else
 848                         break;
 849
 850                 ++str;
 851         }
 852
 853         /*
 854          * precise ip:
 855          *
 856          *  0 - SAMPLE_IP can have arbitrary skid
 857          *  1 - SAMPLE_IP must have constant skid
 858          *  2 - SAMPLE_IP requested to have 0 skid
 859          *  3 - SAMPLE_IP must have 0 skid
 860          *
 861          *  See also PERF_RECORD_MISC_EXACT_IP
 862          */
 863         if (precise > 3)
 864                 return -EINVAL;
 865
 866         mod->eu = eu;
 867         mod->ek = ek;
 868         mod->eh = eh;
 869         mod->eH = eH;
 870         mod->eG = eG;
 871         mod->eI = eI;
 872         mod->precise = precise;
 873         mod->exclude_GH = exclude_GH;
 874         mod->sample_read = sample_read;
 875         mod->pinned = pinned;
 876
 877         return 0;
 878 }
 879
 880 /*
 881  * Basic modifier sanity check to validate it contains only one
 882  * instance of any modifier (apart from 'p') present.
 883  */
 884 static int check_modifier(char *str)
 885 {
 886         char *p = str;
 887
 888         /* The sizeof includes 0 byte as well. */
 889         if (strlen(str) > (sizeof("ukhGHpppSDI") - 1))
 890                 return -1;
 891
 892         while (*p) {
 893                 if (*p != 'p' && strchr(p + 1, *p))
 894                         return -1;
 895                 p++;
 896         }
 897
 898         return 0;
 899 }
 900
 901 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
 902 {
 903         struct perf_evsel *evsel;
 904         struct event_modifier mod;
 905
 906         if (str == NULL)
 907                 return 0;
 908
 909         if (check_modifier(str))
 910                 return -EINVAL;
 911
 912         if (!add && get_event_modifier(&mod, str, NULL))
 913                 return -EINVAL;
 914
 915         __evlist__for_each(list, evsel) {
 916                 if (add && get_event_modifier(&mod, str, evsel))
 917                         return -EINVAL;
 918
 919                 evsel->attr.exclude_user   = mod.eu;
 920                 evsel->attr.exclude_kernel = mod.ek;
 921                 evsel->attr.exclude_hv     = mod.eh;
 922                 evsel->attr.precise_ip     = mod.precise;
 923                 evsel->attr.exclude_host   = mod.eH;
 924                 evsel->attr.exclude_guest  = mod.eG;
 925                 evsel->attr.exclude_idle   = mod.eI;
 926                 evsel->exclude_GH          = mod.exclude_GH;
 927                 evsel->sample_read         = mod.sample_read;
 928
 929                 if (perf_evsel__is_group_leader(evsel))
 930                         evsel->attr.pinned = mod.pinned;
 931         }
 932
 933         return 0;
 934 }
 935
 936 int parse_events_name(struct list_head *list, char *name)
 937 {
 938         struct perf_evsel *evsel;
 939
 940         __evlist__for_each(list, evsel) {
 941                 if (!evsel->name)
 942                         evsel->name = strdup(name);
 943         }
 944
 945         return 0;
 946 }
 947
 948 static int
 949 comp_pmu(const void *p1, const void *p2)
 950 {
 951         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
 952         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
 953
 954         return strcmp(pmu1->symbol, pmu2->symbol);
 955 }
 956
 957 static void perf_pmu__parse_cleanup(void)
 958 {
 959         if (perf_pmu_events_list_num > 0) {
 960                 struct perf_pmu_event_symbol *p;
 961                 int i;
 962
 963                 for (i = 0; i < perf_pmu_events_list_num; i++) {
 964                         p = perf_pmu_events_list + i;
 965                         free(p->symbol);
 966                 }
 967                 free(perf_pmu_events_list);
 968                 perf_pmu_events_list = NULL;
 969                 perf_pmu_events_list_num = 0;
 970         }
 971 }
 972
 973 #define SET_SYMBOL(str, stype)          \
 974 do {                                    \
 975         p->symbol = str;                \
 976         if (!p->symbol)                 \
 977                 goto err;               \
 978         p->type = stype;                \
 979 } while (0)
 980
 981 /*
 982  * Read the pmu events list from sysfs
 983  * Save it into perf_pmu_events_list
 984  */
 985 static void perf_pmu__parse_init(void)
 986 {
 987
 988         struct perf_pmu *pmu = NULL;
 989         struct perf_pmu_alias *alias;
 990         int len = 0;
 991
 992         pmu = perf_pmu__find("cpu");
 993         if ((pmu == NULL) || list_empty(&pmu->aliases)) {
 994                 perf_pmu_events_list_num = -1;
 995                 return;
 996         }
 997         list_for_each_entry(alias, &pmu->aliases, list) {
 998                 if (strchr(alias->name, '-'))
 999                         len++;
1000                 len++;
1001         }
1002         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1003         if (!perf_pmu_events_list)
1004                 return;
1005         perf_pmu_events_list_num = len;
1006
1007         len = 0;
1008         list_for_each_entry(alias, &pmu->aliases, list) {
1009                 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1010                 char *tmp = strchr(alias->name, '-');
1011
1012                 if (tmp != NULL) {
1013                         SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1014                                         PMU_EVENT_SYMBOL_PREFIX);
1015                         p++;
1016                         SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1017                         len += 2;
1018                 } else {
1019                         SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1020                         len++;
1021                 }
1022         }
1023         qsort(perf_pmu_events_list, len,
1024                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1025
1026         return;
1027 err:
1028         perf_pmu__parse_cleanup();
1029 }
1030
1031 enum perf_pmu_event_symbol_type
1032 perf_pmu__parse_check(const char *name)
1033 {
1034         struct perf_pmu_event_symbol p, *r;
1035
1036         /* scan kernel pmu events from sysfs if needed */
1037         if (perf_pmu_events_list_num == 0)
1038                 perf_pmu__parse_init();
1039         /*
1040          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1041          * cpu-cycles has been handled by hardcode.
1042          * So it must be cpu// events, not kernel pmu event.
1043          */
1044         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1045                 return PMU_EVENT_SYMBOL_ERR;
1046
1047         p.symbol = strdup(name);
1048         r = bsearch(&p, perf_pmu_events_list,
1049                         (size_t) perf_pmu_events_list_num,
1050                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1051         free(p.symbol);
1052         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1053 }
1054
1055 static int parse_events__scanner(const char *str, void *data, int start_token)
1056 {
1057         YY_BUFFER_STATE buffer;
1058         void *scanner;
1059         int ret;
1060
1061         ret = parse_events_lex_init_extra(start_token, &scanner);
1062         if (ret)
1063                 return ret;
1064
1065         buffer = parse_events__scan_string(str, scanner);
1066
1067 #ifdef PARSER_DEBUG
1068         parse_events_debug = 1;
1069 #endif
1070         ret = parse_events_parse(data, scanner);
1071
1072         parse_events__flush_buffer(buffer, scanner);
1073         parse_events__delete_buffer(buffer, scanner);
1074         parse_events_lex_destroy(scanner);
1075         return ret;
1076 }
1077
1078 /*
1079  * parse event config string, return a list of event terms.
1080  */
1081 int parse_events_terms(struct list_head *terms, const char *str)
1082 {
1083         struct parse_events_terms data = {
1084                 .terms = NULL,
1085         };
1086         int ret;
1087
1088         ret = parse_events__scanner(str, &data, PE_START_TERMS);
1089         if (!ret) {
1090                 list_splice(data.terms, terms);
1091                 zfree(&data.terms);
1092                 return 0;
1093         }
1094
1095         if (data.terms)
1096                 parse_events__free_terms(data.terms);
1097         return ret;
1098 }
1099
1100 int parse_events(struct perf_evlist *evlist, const char *str,
1101                  struct parse_events_error *err)
1102 {
1103         struct parse_events_evlist data = {
1104                 .list  = LIST_HEAD_INIT(data.list),
1105                 .idx   = evlist->nr_entries,
1106                 .error = err,
1107         };
1108         int ret;
1109
1110         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1111         perf_pmu__parse_cleanup();
1112         if (!ret) {
1113                 int entries = data.idx - evlist->nr_entries;
1114                 struct perf_evsel *last;
1115
1116                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
1117                 evlist->nr_groups += data.nr_groups;
1118                 last = perf_evlist__last(evlist);
1119                 last->cmdline_group_boundary = true;
1120
1121                 return 0;
1122         }
1123
1124         /*
1125          * There are 2 users - builtin-record and builtin-test objects.
1126          * Both call perf_evlist__delete in case of error, so we dont
1127          * need to bother.
1128          */
1129         return ret;
1130 }
1131
1132 #define MAX_WIDTH 1000
1133 static int get_term_width(void)
1134 {
1135         struct winsize ws;
1136
1137         get_term_dimensions(&ws);
1138         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1139 }
1140
1141 static void parse_events_print_error(struct parse_events_error *err,
1142                                      const char *event)
1143 {
1144         const char *str = "invalid or unsupported event: ";
1145         char _buf[MAX_WIDTH];
1146         char *buf = (char *) event;
1147         int idx = 0;
1148
1149         if (err->str) {
1150                 /* -2 for extra '' in the final fprintf */
1151                 int width       = get_term_width() - 2;
1152                 int len_event   = strlen(event);
1153                 int len_str, max_len, cut = 0;
1154
1155                 /*
1156                  * Maximum error index indent, we will cut
1157                  * the event string if it's bigger.
1158                  */
1159                 int max_err_idx = 10;
1160
1161                 /*
1162                  * Let's be specific with the message when
1163                  * we have the precise error.
1164                  */
1165                 str     = "event syntax error: ";
1166                 len_str = strlen(str);
1167                 max_len = width - len_str;
1168
1169                 buf = _buf;
1170
1171                 /* We're cutting from the beggining. */
1172                 if (err->idx > max_err_idx)
1173                         cut = err->idx - max_err_idx;
1174
1175                 strncpy(buf, event + cut, max_len);
1176
1177                 /* Mark cut parts with '..' on both sides. */
1178                 if (cut)
1179                         buf[0] = buf[1] = '.';
1180
1181                 if ((len_event - cut) > max_len) {
1182                         buf[max_len - 1] = buf[max_len - 2] = '.';
1183                         buf[max_len] = 0;
1184                 }
1185
1186                 idx = len_str + err->idx - cut;
1187         }
1188
1189         fprintf(stderr, "%s'%s'\n", str, buf);
1190         if (idx) {
1191                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1192                 if (err->help)
1193                         fprintf(stderr, "\n%s\n", err->help);
1194                 free(err->str);
1195                 free(err->help);
1196         }
1197
1198         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1199 }
1200
1201 #undef MAX_WIDTH
1202
1203 int parse_events_option(const struct option *opt, const char *str,
1204                         int unset __maybe_unused)
1205 {
1206         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1207         struct parse_events_error err = { .idx = 0, };
1208         int ret = parse_events(evlist, str, &err);
1209
1210         if (ret)
1211                 parse_events_print_error(&err, str);
1212
1213         return ret;
1214 }
1215
1216 static int
1217 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1218                            int (*func)(struct perf_evsel *evsel,
1219                                        const void *arg),
1220                            const void *arg)
1221 {
1222         struct perf_evsel *last = NULL;
1223         int err;
1224
1225         if (evlist->nr_entries > 0)
1226                 last = perf_evlist__last(evlist);
1227
1228         do {
1229                 err = (*func)(last, arg);
1230                 if (err)
1231                         return -1;
1232                 if (!last)
1233                         return 0;
1234
1235                 if (last->node.prev == &evlist->entries)
1236                         return 0;
1237                 last = list_entry(last->node.prev, struct perf_evsel, node);
1238         } while (!last->cmdline_group_boundary);
1239
1240         return 0;
1241 }
1242
1243 static int set_filter(struct perf_evsel *evsel, const void *arg)
1244 {
1245         const char *str = arg;
1246
1247         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1248                 fprintf(stderr,
1249                         "--filter option should follow a -e tracepoint option\n");
1250                 return -1;
1251         }
1252
1253         if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1254                 fprintf(stderr,
1255                         "not enough memory to hold filter string\n");
1256                 return -1;
1257         }
1258
1259         return 0;
1260 }
1261
1262 int parse_filter(const struct option *opt, const char *str,
1263                  int unset __maybe_unused)
1264 {
1265         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1266
1267         return foreach_evsel_in_last_glob(evlist, set_filter,
1268                                           (const void *)str);
1269 }
1270
1271 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1272                                    const void *arg __maybe_unused)
1273 {
1274         char new_filter[64];
1275
1276         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1277                 fprintf(stderr,
1278                         "--exclude-perf option should follow a -e tracepoint option\n");
1279                 return -1;
1280         }
1281
1282         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1283
1284         if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1285                 fprintf(stderr,
1286                         "not enough memory to hold filter string\n");
1287                 return -1;
1288         }
1289
1290         return 0;
1291 }
1292
1293 int exclude_perf(const struct option *opt,
1294                  const char *arg __maybe_unused,
1295                  int unset __maybe_unused)
1296 {
1297         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1298
1299         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1300                                           NULL);
1301 }
1302
1303 static const char * const event_type_descriptors[] = {
1304         "Hardware event",
1305         "Software event",
1306         "Tracepoint event",
1307         "Hardware cache event",
1308         "Raw hardware event descriptor",
1309         "Hardware breakpoint",
1310 };
1311
1312 static int cmp_string(const void *a, const void *b)
1313 {
1314         const char * const *as = a;
1315         const char * const *bs = b;
1316
1317         return strcmp(*as, *bs);
1318 }
1319
1320 /*
1321  * Print the events from <debugfs_mount_point>/tracing/events
1322  */
1323
1324 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1325                              bool name_only)
1326 {
1327         DIR *sys_dir, *evt_dir;
1328         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1329         char evt_path[MAXPATHLEN];
1330         char dir_path[MAXPATHLEN];
1331         char **evt_list = NULL;
1332         unsigned int evt_i = 0, evt_num = 0;
1333         bool evt_num_known = false;
1334
1335 restart:
1336         sys_dir = opendir(tracing_events_path);
1337         if (!sys_dir)
1338                 return;
1339
1340         if (evt_num_known) {
1341                 evt_list = zalloc(sizeof(char *) * evt_num);
1342                 if (!evt_list)
1343                         goto out_close_sys_dir;
1344         }
1345
1346         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1347                 if (subsys_glob != NULL &&
1348                     !strglobmatch(sys_dirent.d_name, subsys_glob))
1349                         continue;
1350
1351                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1352                          sys_dirent.d_name);
1353                 evt_dir = opendir(dir_path);
1354                 if (!evt_dir)
1355                         continue;
1356
1357                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1358                         if (event_glob != NULL &&
1359                             !strglobmatch(evt_dirent.d_name, event_glob))
1360                                 continue;
1361
1362                         if (!evt_num_known) {
1363                                 evt_num++;
1364                                 continue;
1365                         }
1366
1367                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1368                                  sys_dirent.d_name, evt_dirent.d_name);
1369
1370                         evt_list[evt_i] = strdup(evt_path);
1371                         if (evt_list[evt_i] == NULL)
1372                                 goto out_close_evt_dir;
1373                         evt_i++;
1374                 }
1375                 closedir(evt_dir);
1376         }
1377         closedir(sys_dir);
1378
1379         if (!evt_num_known) {
1380                 evt_num_known = true;
1381                 goto restart;
1382         }
1383         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1384         evt_i = 0;
1385         while (evt_i < evt_num) {
1386                 if (name_only) {
1387                         printf("%s ", evt_list[evt_i++]);
1388                         continue;
1389                 }
1390                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1391                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1392         }
1393         if (evt_num)
1394                 printf("\n");
1395
1396 out_free:
1397         evt_num = evt_i;
1398         for (evt_i = 0; evt_i < evt_num; evt_i++)
1399                 zfree(&evt_list[evt_i]);
1400         zfree(&evt_list);
1401         return;
1402
1403 out_close_evt_dir:
1404         closedir(evt_dir);
1405 out_close_sys_dir:
1406         closedir(sys_dir);
1407
1408         printf("FATAL: not enough memory to print %s\n",
1409                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1410         if (evt_list)
1411                 goto out_free;
1412 }
1413
1414 /*
1415  * Check whether event is in <debugfs_mount_point>/tracing/events
1416  */
1417
1418 int is_valid_tracepoint(const char *event_string)
1419 {
1420         DIR *sys_dir, *evt_dir;
1421         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1422         char evt_path[MAXPATHLEN];
1423         char dir_path[MAXPATHLEN];
1424
1425         sys_dir = opendir(tracing_events_path);
1426         if (!sys_dir)
1427                 return 0;
1428
1429         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1430
1431                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1432                          sys_dirent.d_name);
1433                 evt_dir = opendir(dir_path);
1434                 if (!evt_dir)
1435                         continue;
1436
1437                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1438                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1439                                  sys_dirent.d_name, evt_dirent.d_name);
1440                         if (!strcmp(evt_path, event_string)) {
1441                                 closedir(evt_dir);
1442                                 closedir(sys_dir);
1443                                 return 1;
1444                         }
1445                 }
1446                 closedir(evt_dir);
1447         }
1448         closedir(sys_dir);
1449         return 0;
1450 }
1451
1452 static bool is_event_supported(u8 type, unsigned config)
1453 {
1454         bool ret = true;
1455         int open_return;
1456         struct perf_evsel *evsel;
1457         struct perf_event_attr attr = {
1458                 .type = type,
1459                 .config = config,
1460                 .disabled = 1,
1461         };
1462         struct {
1463                 struct thread_map map;
1464                 int threads[1];
1465         } tmap = {
1466                 .map.nr  = 1,
1467                 .threads = { 0 },
1468         };
1469
1470         evsel = perf_evsel__new(&attr);
1471         if (evsel) {
1472                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1473                 ret = open_return >= 0;
1474
1475                 if (open_return == -EACCES) {
1476                         /*
1477                          * This happens if the paranoid value
1478                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1479                          * Re-run with exclude_kernel set; we don't do that
1480                          * by default as some ARM machines do not support it.
1481                          *
1482                          */
1483                         evsel->attr.exclude_kernel = 1;
1484                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1485                 }
1486                 perf_evsel__delete(evsel);
1487         }
1488
1489         return ret;
1490 }
1491
1492 int print_hwcache_events(const char *event_glob, bool name_only)
1493 {
1494         unsigned int type, op, i, evt_i = 0, evt_num = 0;
1495         char name[64];
1496         char **evt_list = NULL;
1497         bool evt_num_known = false;
1498
1499 restart:
1500         if (evt_num_known) {
1501                 evt_list = zalloc(sizeof(char *) * evt_num);
1502                 if (!evt_list)
1503                         goto out_enomem;
1504         }
1505
1506         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1507                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1508                         /* skip invalid cache type */
1509                         if (!perf_evsel__is_cache_op_valid(type, op))
1510                                 continue;
1511
1512                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1513                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1514                                                                         name, sizeof(name));
1515                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1516                                         continue;
1517
1518                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1519                                                         type | (op << 8) | (i << 16)))
1520                                         continue;
1521
1522                                 if (!evt_num_known) {
1523                                         evt_num++;
1524                                         continue;
1525                                 }
1526
1527                                 evt_list[evt_i] = strdup(name);
1528                                 if (evt_list[evt_i] == NULL)
1529                                         goto out_enomem;
1530                                 evt_i++;
1531                         }
1532                 }
1533         }
1534
1535         if (!evt_num_known) {
1536                 evt_num_known = true;
1537                 goto restart;
1538         }
1539         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1540         evt_i = 0;
1541         while (evt_i < evt_num) {
1542                 if (name_only) {
1543                         printf("%s ", evt_list[evt_i++]);
1544                         continue;
1545                 }
1546                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1547                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1548         }
1549         if (evt_num)
1550                 printf("\n");
1551
1552 out_free:
1553         evt_num = evt_i;
1554         for (evt_i = 0; evt_i < evt_num; evt_i++)
1555                 zfree(&evt_list[evt_i]);
1556         zfree(&evt_list);
1557         return evt_num;
1558
1559 out_enomem:
1560         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1561         if (evt_list)
1562                 goto out_free;
1563         return evt_num;
1564 }
1565
1566 void print_symbol_events(const char *event_glob, unsigned type,
1567                                 struct event_symbol *syms, unsigned max,
1568                                 bool name_only)
1569 {
1570         unsigned int i, evt_i = 0, evt_num = 0;
1571         char name[MAX_NAME_LEN];
1572         char **evt_list = NULL;
1573         bool evt_num_known = false;
1574
1575 restart:
1576         if (evt_num_known) {
1577                 evt_list = zalloc(sizeof(char *) * evt_num);
1578                 if (!evt_list)
1579                         goto out_enomem;
1580                 syms -= max;
1581         }
1582
1583         for (i = 0; i < max; i++, syms++) {
1584
1585                 if (event_glob != NULL &&
1586                     !(strglobmatch(syms->symbol, event_glob) ||
1587                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1588                         continue;
1589
1590                 if (!is_event_supported(type, i))
1591                         continue;
1592
1593                 if (!evt_num_known) {
1594                         evt_num++;
1595                         continue;
1596                 }
1597
1598                 if (!name_only && strlen(syms->alias))
1599                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1600                 else
1601                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1602
1603                 evt_list[evt_i] = strdup(name);
1604                 if (evt_list[evt_i] == NULL)
1605                         goto out_enomem;
1606                 evt_i++;
1607         }
1608
1609         if (!evt_num_known) {
1610                 evt_num_known = true;
1611                 goto restart;
1612         }
1613         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1614         evt_i = 0;
1615         while (evt_i < evt_num) {
1616                 if (name_only) {
1617                         printf("%s ", evt_list[evt_i++]);
1618                         continue;
1619                 }
1620                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1621         }
1622         if (evt_num)
1623                 printf("\n");
1624
1625 out_free:
1626         evt_num = evt_i;
1627         for (evt_i = 0; evt_i < evt_num; evt_i++)
1628                 zfree(&evt_list[evt_i]);
1629         zfree(&evt_list);
1630         return;
1631
1632 out_enomem:
1633         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1634         if (evt_list)
1635                 goto out_free;
1636 }
1637
1638 /*
1639  * Print the help text for the event symbols:
1640  */
1641 void print_events(const char *event_glob, bool name_only)
1642 {
1643         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1644                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1645
1646         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1647                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1648
1649         print_hwcache_events(event_glob, name_only);
1650
1651         print_pmu_events(event_glob, name_only);
1652
1653         if (event_glob != NULL)
1654                 return;
1655
1656         if (!name_only) {
1657                 printf("  %-50s [%s]\n",
1658                        "rNNN",
1659                        event_type_descriptors[PERF_TYPE_RAW]);
1660                 printf("  %-50s [%s]\n",
1661                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1662                        event_type_descriptors[PERF_TYPE_RAW]);
1663                 printf("   (see 'man perf-list' on how to encode it)\n");
1664                 printf("\n");
1665
1666                 printf("  %-50s [%s]\n",
1667                        "mem:<addr>[/len][:access]",
1668                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1669                 printf("\n");
1670         }
1671
1672         print_tracepoint_events(NULL, NULL, name_only);
1673 }
1674
1675 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1676 {
1677         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1678 }
1679
1680 static int new_term(struct parse_events_term **_term, int type_val,
1681                     int type_term, char *config,
1682                     char *str, u64 num, int err_term, int err_val)
1683 {
1684         struct parse_events_term *term;
1685
1686         term = zalloc(sizeof(*term));
1687         if (!term)
1688                 return -ENOMEM;
1689
1690         INIT_LIST_HEAD(&term->list);
1691         term->type_val  = type_val;
1692         term->type_term = type_term;
1693         term->config = config;
1694         term->err_term = err_term;
1695         term->err_val  = err_val;
1696
1697         switch (type_val) {
1698         case PARSE_EVENTS__TERM_TYPE_NUM:
1699                 term->val.num = num;
1700                 break;
1701         case PARSE_EVENTS__TERM_TYPE_STR:
1702                 term->val.str = str;
1703                 break;
1704         default:
1705                 free(term);
1706                 return -EINVAL;
1707         }
1708
1709         *_term = term;
1710         return 0;
1711 }
1712
1713 int parse_events_term__num(struct parse_events_term **term,
1714                            int type_term, char *config, u64 num,
1715                            void *loc_term_, void *loc_val_)
1716 {
1717         YYLTYPE *loc_term = loc_term_;
1718         YYLTYPE *loc_val = loc_val_;
1719
1720         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1721                         config, NULL, num,
1722                         loc_term ? loc_term->first_column : 0,
1723                         loc_val ? loc_val->first_column : 0);
1724 }
1725
1726 int parse_events_term__str(struct parse_events_term **term,
1727                            int type_term, char *config, char *str,
1728                            void *loc_term_, void *loc_val_)
1729 {
1730         YYLTYPE *loc_term = loc_term_;
1731         YYLTYPE *loc_val = loc_val_;
1732
1733         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1734                         config, str, 0,
1735                         loc_term ? loc_term->first_column : 0,
1736                         loc_val ? loc_val->first_column : 0);
1737 }
1738
1739 int parse_events_term__sym_hw(struct parse_events_term **term,
1740                               char *config, unsigned idx)
1741 {
1742         struct event_symbol *sym;
1743
1744         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1745         sym = &event_symbols_hw[idx];
1746
1747         if (config)
1748                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1749                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1750                                 (char *) sym->symbol, 0, 0, 0);
1751         else
1752                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1753                                 PARSE_EVENTS__TERM_TYPE_USER,
1754                                 (char *) "event", (char *) sym->symbol,
1755                                 0, 0, 0);
1756 }
1757
1758 int parse_events_term__clone(struct parse_events_term **new,
1759                              struct parse_events_term *term)
1760 {
1761         return new_term(new, term->type_val, term->type_term, term->config,
1762                         term->val.str, term->val.num,
1763                         term->err_term, term->err_val);
1764 }
1765
1766 void parse_events__free_terms(struct list_head *terms)
1767 {
1768         struct parse_events_term *term, *h;
1769
1770         list_for_each_entry_safe(term, h, terms, list)
1771                 free(term);
1772 }
1773
1774 void parse_events_evlist_error(struct parse_events_evlist *data,
1775                                int idx, const char *str)
1776 {
1777         struct parse_events_error *err = data->error;
1778
1779         if (!err)
1780                 return;
1781         err->idx = idx;
1782         err->str = strdup(str);
1783         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
1784 }