tools/perf/util/parse-events.c

   1 #include "../../../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 "debugfs.h"
  14 #include "parse-events-bison.h"
  15 #define YY_EXTRA_TYPE int
  16 #include "parse-events-flex.h"
  17 #include "pmu.h"
  18
  19 #define MAX_NAME_LEN 100
  20
  21 struct event_symbol {
  22         const char      *symbol;
  23         const char      *alias;
  24 };
  25
  26 #ifdef PARSER_DEBUG
  27 extern int parse_events_debug;
  28 #endif
  29 int parse_events_parse(void *data, void *scanner);
  30
  31 static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  32         [PERF_COUNT_HW_CPU_CYCLES] = {
  33                 .symbol = "cpu-cycles",
  34                 .alias  = "cycles",
  35         },
  36         [PERF_COUNT_HW_INSTRUCTIONS] = {
  37                 .symbol = "instructions",
  38                 .alias  = "",
  39         },
  40         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  41                 .symbol = "cache-references",
  42                 .alias  = "",
  43         },
  44         [PERF_COUNT_HW_CACHE_MISSES] = {
  45                 .symbol = "cache-misses",
  46                 .alias  = "",
  47         },
  48         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  49                 .symbol = "branch-instructions",
  50                 .alias  = "branches",
  51         },
  52         [PERF_COUNT_HW_BRANCH_MISSES] = {
  53                 .symbol = "branch-misses",
  54                 .alias  = "",
  55         },
  56         [PERF_COUNT_HW_BUS_CYCLES] = {
  57                 .symbol = "bus-cycles",
  58                 .alias  = "",
  59         },
  60         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  61                 .symbol = "stalled-cycles-frontend",
  62                 .alias  = "idle-cycles-frontend",
  63         },
  64         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  65                 .symbol = "stalled-cycles-backend",
  66                 .alias  = "idle-cycles-backend",
  67         },
  68         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  69                 .symbol = "ref-cycles",
  70                 .alias  = "",
  71         },
  72 };
  73
  74 static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  75         [PERF_COUNT_SW_CPU_CLOCK] = {
  76                 .symbol = "cpu-clock",
  77                 .alias  = "",
  78         },
  79         [PERF_COUNT_SW_TASK_CLOCK] = {
  80                 .symbol = "task-clock",
  81                 .alias  = "",
  82         },
  83         [PERF_COUNT_SW_PAGE_FAULTS] = {
  84                 .symbol = "page-faults",
  85                 .alias  = "faults",
  86         },
  87         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  88                 .symbol = "context-switches",
  89                 .alias  = "cs",
  90         },
  91         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
  92                 .symbol = "cpu-migrations",
  93                 .alias  = "migrations",
  94         },
  95         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
  96                 .symbol = "minor-faults",
  97                 .alias  = "",
  98         },
  99         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 100                 .symbol = "major-faults",
 101                 .alias  = "",
 102         },
 103         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 104                 .symbol = "alignment-faults",
 105                 .alias  = "",
 106         },
 107         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 108                 .symbol = "emulation-faults",
 109                 .alias  = "",
 110         },
 111 };
 112
 113 #define __PERF_EVENT_FIELD(config, name) \
 114         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 115
 116 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 117 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 118 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 119 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 120
 121 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 122         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 123         if (sys_dirent.d_type == DT_DIR &&                                     \
 124            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 125            (strcmp(sys_dirent.d_name, "..")))
 126
 127 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 128 {
 129         char evt_path[MAXPATHLEN];
 130         int fd;
 131
 132         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 133                         sys_dir->d_name, evt_dir->d_name);
 134         fd = open(evt_path, O_RDONLY);
 135         if (fd < 0)
 136                 return -EINVAL;
 137         close(fd);
 138
 139         return 0;
 140 }
 141
 142 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 143         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 144         if (evt_dirent.d_type == DT_DIR &&                                     \
 145            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 146            (strcmp(evt_dirent.d_name, "..")) &&                                \
 147            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 148
 149 #define MAX_EVENT_LENGTH 512
 150
 151
 152 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 153 {
 154         struct tracepoint_path *path = NULL;
 155         DIR *sys_dir, *evt_dir;
 156         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 157         char id_buf[24];
 158         int fd;
 159         u64 id;
 160         char evt_path[MAXPATHLEN];
 161         char dir_path[MAXPATHLEN];
 162
 163         if (debugfs_valid_mountpoint(tracing_events_path))
 164                 return NULL;
 165
 166         sys_dir = opendir(tracing_events_path);
 167         if (!sys_dir)
 168                 return NULL;
 169
 170         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 171
 172                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 173                          sys_dirent.d_name);
 174                 evt_dir = opendir(dir_path);
 175                 if (!evt_dir)
 176                         continue;
 177
 178                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 179
 180                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 181                                  evt_dirent.d_name);
 182                         fd = open(evt_path, O_RDONLY);
 183                         if (fd < 0)
 184                                 continue;
 185                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 186                                 close(fd);
 187                                 continue;
 188                         }
 189                         close(fd);
 190                         id = atoll(id_buf);
 191                         if (id == config) {
 192                                 closedir(evt_dir);
 193                                 closedir(sys_dir);
 194                                 path = zalloc(sizeof(*path));
 195                                 path->system = malloc(MAX_EVENT_LENGTH);
 196                                 if (!path->system) {
 197                                         free(path);
 198                                         return NULL;
 199                                 }
 200                                 path->name = malloc(MAX_EVENT_LENGTH);
 201                                 if (!path->name) {
 202                                         free(path->system);
 203                                         free(path);
 204                                         return NULL;
 205                                 }
 206                                 strncpy(path->system, sys_dirent.d_name,
 207                                         MAX_EVENT_LENGTH);
 208                                 strncpy(path->name, evt_dirent.d_name,
 209                                         MAX_EVENT_LENGTH);
 210                                 return path;
 211                         }
 212                 }
 213                 closedir(evt_dir);
 214         }
 215
 216         closedir(sys_dir);
 217         return NULL;
 218 }
 219
 220 const char *event_type(int type)
 221 {
 222         switch (type) {
 223         case PERF_TYPE_HARDWARE:
 224                 return "hardware";
 225
 226         case PERF_TYPE_SOFTWARE:
 227                 return "software";
 228
 229         case PERF_TYPE_TRACEPOINT:
 230                 return "tracepoint";
 231
 232         case PERF_TYPE_HW_CACHE:
 233                 return "hardware-cache";
 234
 235         default:
 236                 break;
 237         }
 238
 239         return "unknown";
 240 }
 241
 242 static int add_event(struct list_head **_list, int *idx,
 243                      struct perf_event_attr *attr, char *name)
 244 {
 245         struct perf_evsel *evsel;
 246         struct list_head *list = *_list;
 247
 248         if (!list) {
 249                 list = malloc(sizeof(*list));
 250                 if (!list)
 251                         return -ENOMEM;
 252                 INIT_LIST_HEAD(list);
 253         }
 254
 255         event_attr_init(attr);
 256
 257         evsel = perf_evsel__new(attr, (*idx)++);
 258         if (!evsel) {
 259                 free(list);
 260                 return -ENOMEM;
 261         }
 262
 263         if (name)
 264                 evsel->name = strdup(name);
 265         list_add_tail(&evsel->node, list);
 266         *_list = list;
 267         return 0;
 268 }
 269
 270 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 271 {
 272         int i, j;
 273         int n, longest = -1;
 274
 275         for (i = 0; i < size; i++) {
 276                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 277                         n = strlen(names[i][j]);
 278                         if (n > longest && !strncasecmp(str, names[i][j], n))
 279                                 longest = n;
 280                 }
 281                 if (longest > 0)
 282                         return i;
 283         }
 284
 285         return -1;
 286 }
 287
 288 int parse_events_add_cache(struct list_head **list, int *idx,
 289                            char *type, char *op_result1, char *op_result2)
 290 {
 291         struct perf_event_attr attr;
 292         char name[MAX_NAME_LEN];
 293         int cache_type = -1, cache_op = -1, cache_result = -1;
 294         char *op_result[2] = { op_result1, op_result2 };
 295         int i, n;
 296
 297         /*
 298          * No fallback - if we cannot get a clear cache type
 299          * then bail out:
 300          */
 301         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 302                                    PERF_COUNT_HW_CACHE_MAX);
 303         if (cache_type == -1)
 304                 return -EINVAL;
 305
 306         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 307
 308         for (i = 0; (i < 2) && (op_result[i]); i++) {
 309                 char *str = op_result[i];
 310
 311                 snprintf(name + n, MAX_NAME_LEN - n, "-%s\n", str);
 312
 313                 if (cache_op == -1) {
 314                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 315                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 316                         if (cache_op >= 0) {
 317                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 318                                         return -EINVAL;
 319                                 continue;
 320                         }
 321                 }
 322
 323                 if (cache_result == -1) {
 324                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 325                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 326                         if (cache_result >= 0)
 327                                 continue;
 328                 }
 329         }
 330
 331         /*
 332          * Fall back to reads:
 333          */
 334         if (cache_op == -1)
 335                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 336
 337         /*
 338          * Fall back to accesses:
 339          */
 340         if (cache_result == -1)
 341                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 342
 343         memset(&attr, 0, sizeof(attr));
 344         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 345         attr.type = PERF_TYPE_HW_CACHE;
 346         return add_event(list, idx, &attr, name);
 347 }
 348
 349 static int add_tracepoint(struct list_head **list, int *idx,
 350                           char *sys_name, char *evt_name)
 351 {
 352         struct perf_event_attr attr;
 353         char name[MAX_NAME_LEN];
 354         char evt_path[MAXPATHLEN];
 355         char id_buf[4];
 356         u64 id;
 357         int fd;
 358
 359         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 360                  sys_name, evt_name);
 361
 362         fd = open(evt_path, O_RDONLY);
 363         if (fd < 0)
 364                 return -1;
 365
 366         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 367                 close(fd);
 368                 return -1;
 369         }
 370
 371         close(fd);
 372         id = atoll(id_buf);
 373
 374         memset(&attr, 0, sizeof(attr));
 375         attr.config = id;
 376         attr.type = PERF_TYPE_TRACEPOINT;
 377         attr.sample_type |= PERF_SAMPLE_RAW;
 378         attr.sample_type |= PERF_SAMPLE_TIME;
 379         attr.sample_type |= PERF_SAMPLE_CPU;
 380         attr.sample_type |= PERF_SAMPLE_PERIOD;
 381         attr.sample_period = 1;
 382
 383         snprintf(name, MAX_NAME_LEN, "%s:%s", sys_name, evt_name);
 384         return add_event(list, idx, &attr, name);
 385 }
 386
 387 static int add_tracepoint_multi(struct list_head **list, int *idx,
 388                                 char *sys_name, char *evt_name)
 389 {
 390         char evt_path[MAXPATHLEN];
 391         struct dirent *evt_ent;
 392         DIR *evt_dir;
 393         int ret = 0;
 394
 395         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 396         evt_dir = opendir(evt_path);
 397         if (!evt_dir) {
 398                 perror("Can't open event dir");
 399                 return -1;
 400         }
 401
 402         while (!ret && (evt_ent = readdir(evt_dir))) {
 403                 if (!strcmp(evt_ent->d_name, ".")
 404                     || !strcmp(evt_ent->d_name, "..")
 405                     || !strcmp(evt_ent->d_name, "enable")
 406                     || !strcmp(evt_ent->d_name, "filter"))
 407                         continue;
 408
 409                 if (!strglobmatch(evt_ent->d_name, evt_name))
 410                         continue;
 411
 412                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 413         }
 414
 415         return ret;
 416 }
 417
 418 int parse_events_add_tracepoint(struct list_head **list, int *idx,
 419                                 char *sys, char *event)
 420 {
 421         int ret;
 422
 423         ret = debugfs_valid_mountpoint(tracing_events_path);
 424         if (ret)
 425                 return ret;
 426
 427         return strpbrk(event, "*?") ?
 428                add_tracepoint_multi(list, idx, sys, event) :
 429                add_tracepoint(list, idx, sys, event);
 430 }
 431
 432 static int
 433 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 434 {
 435         int i;
 436
 437         for (i = 0; i < 3; i++) {
 438                 if (!type || !type[i])
 439                         break;
 440
 441 #define CHECK_SET_TYPE(bit)             \
 442 do {                                    \
 443         if (attr->bp_type & bit)        \
 444                 return -EINVAL;         \
 445         else                            \
 446                 attr->bp_type |= bit;   \
 447 } while (0)
 448
 449                 switch (type[i]) {
 450                 case 'r':
 451                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 452                         break;
 453                 case 'w':
 454                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 455                         break;
 456                 case 'x':
 457                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 458                         break;
 459                 default:
 460                         return -EINVAL;
 461                 }
 462         }
 463
 464 #undef CHECK_SET_TYPE
 465
 466         if (!attr->bp_type) /* Default */
 467                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 468
 469         return 0;
 470 }
 471
 472 int parse_events_add_breakpoint(struct list_head **list, int *idx,
 473                                 void *ptr, char *type)
 474 {
 475         struct perf_event_attr attr;
 476
 477         memset(&attr, 0, sizeof(attr));
 478         attr.bp_addr = (unsigned long) ptr;
 479
 480         if (parse_breakpoint_type(type, &attr))
 481                 return -EINVAL;
 482
 483         /*
 484          * We should find a nice way to override the access length
 485          * Provide some defaults for now
 486          */
 487         if (attr.bp_type == HW_BREAKPOINT_X)
 488                 attr.bp_len = sizeof(long);
 489         else
 490                 attr.bp_len = HW_BREAKPOINT_LEN_4;
 491
 492         attr.type = PERF_TYPE_BREAKPOINT;
 493         attr.sample_period = 1;
 494
 495         return add_event(list, idx, &attr, NULL);
 496 }
 497
 498 static int config_term(struct perf_event_attr *attr,
 499                        struct parse_events__term *term)
 500 {
 501 #define CHECK_TYPE_VAL(type)                                    \
 502 do {                                                            \
 503         if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
 504                 return -EINVAL;                                 \
 505 } while (0)
 506
 507         switch (term->type_term) {
 508         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 509                 CHECK_TYPE_VAL(NUM);
 510                 attr->config = term->val.num;
 511                 break;
 512         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 513                 CHECK_TYPE_VAL(NUM);
 514                 attr->config1 = term->val.num;
 515                 break;
 516         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 517                 CHECK_TYPE_VAL(NUM);
 518                 attr->config2 = term->val.num;
 519                 break;
 520         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 521                 CHECK_TYPE_VAL(NUM);
 522                 attr->sample_period = term->val.num;
 523                 break;
 524         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 525                 /*
 526                  * TODO uncomment when the field is available
 527                  * attr->branch_sample_type = term->val.num;
 528                  */
 529                 break;
 530         case PARSE_EVENTS__TERM_TYPE_NAME:
 531                 CHECK_TYPE_VAL(STR);
 532                 break;
 533         default:
 534                 return -EINVAL;
 535         }
 536
 537         return 0;
 538 #undef CHECK_TYPE_VAL
 539 }
 540
 541 static int config_attr(struct perf_event_attr *attr,
 542                        struct list_head *head, int fail)
 543 {
 544         struct parse_events__term *term;
 545
 546         list_for_each_entry(term, head, list)
 547                 if (config_term(attr, term) && fail)
 548                         return -EINVAL;
 549
 550         return 0;
 551 }
 552
 553 int parse_events_add_numeric(struct list_head **list, int *idx,
 554                              unsigned long type, unsigned long config,
 555                              struct list_head *head_config)
 556 {
 557         struct perf_event_attr attr;
 558
 559         memset(&attr, 0, sizeof(attr));
 560         attr.type = type;
 561         attr.config = config;
 562
 563         if (head_config &&
 564             config_attr(&attr, head_config, 1))
 565                 return -EINVAL;
 566
 567         return add_event(list, idx, &attr, NULL);
 568 }
 569
 570 static int parse_events__is_name_term(struct parse_events__term *term)
 571 {
 572         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 573 }
 574
 575 static char *pmu_event_name(struct list_head *head_terms)
 576 {
 577         struct parse_events__term *term;
 578
 579         list_for_each_entry(term, head_terms, list)
 580                 if (parse_events__is_name_term(term))
 581                         return term->val.str;
 582
 583         return NULL;
 584 }
 585
 586 int parse_events_add_pmu(struct list_head **list, int *idx,
 587                          char *name, struct list_head *head_config)
 588 {
 589         struct perf_event_attr attr;
 590         struct perf_pmu *pmu;
 591
 592         pmu = perf_pmu__find(name);
 593         if (!pmu)
 594                 return -EINVAL;
 595
 596         memset(&attr, 0, sizeof(attr));
 597
 598         if (perf_pmu__check_alias(pmu, head_config))
 599                 return -EINVAL;
 600
 601         /*
 602          * Configure hardcoded terms first, no need to check
 603          * return value when called with fail == 0 ;)
 604          */
 605         config_attr(&attr, head_config, 0);
 606
 607         if (perf_pmu__config(pmu, &attr, head_config))
 608                 return -EINVAL;
 609
 610         return add_event(list, idx, &attr,
 611                          pmu_event_name(head_config));
 612 }
 613
 614 void parse_events_update_lists(struct list_head *list_event,
 615                                struct list_head *list_all)
 616 {
 617         /*
 618          * Called for single event definition. Update the
 619          * 'all event' list, and reinit the 'signle event'
 620          * list, for next event definition.
 621          */
 622         list_splice_tail(list_event, list_all);
 623         free(list_event);
 624 }
 625
 626 int parse_events_modifier(struct list_head *list, char *str)
 627 {
 628         struct perf_evsel *evsel;
 629         int exclude = 0, exclude_GH = 0;
 630         int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
 631
 632         if (str == NULL)
 633                 return 0;
 634
 635         while (*str) {
 636                 if (*str == 'u') {
 637                         if (!exclude)
 638                                 exclude = eu = ek = eh = 1;
 639                         eu = 0;
 640                 } else if (*str == 'k') {
 641                         if (!exclude)
 642                                 exclude = eu = ek = eh = 1;
 643                         ek = 0;
 644                 } else if (*str == 'h') {
 645                         if (!exclude)
 646                                 exclude = eu = ek = eh = 1;
 647                         eh = 0;
 648                 } else if (*str == 'G') {
 649                         if (!exclude_GH)
 650                                 exclude_GH = eG = eH = 1;
 651                         eG = 0;
 652                 } else if (*str == 'H') {
 653                         if (!exclude_GH)
 654                                 exclude_GH = eG = eH = 1;
 655                         eH = 0;
 656                 } else if (*str == 'p') {
 657                         precise++;
 658                 } else
 659                         break;
 660
 661                 ++str;
 662         }
 663
 664         /*
 665          * precise ip:
 666          *
 667          *  0 - SAMPLE_IP can have arbitrary skid
 668          *  1 - SAMPLE_IP must have constant skid
 669          *  2 - SAMPLE_IP requested to have 0 skid
 670          *  3 - SAMPLE_IP must have 0 skid
 671          *
 672          *  See also PERF_RECORD_MISC_EXACT_IP
 673          */
 674         if (precise > 3)
 675                 return -EINVAL;
 676
 677         list_for_each_entry(evsel, list, node) {
 678                 evsel->attr.exclude_user   = eu;
 679                 evsel->attr.exclude_kernel = ek;
 680                 evsel->attr.exclude_hv     = eh;
 681                 evsel->attr.precise_ip     = precise;
 682                 evsel->attr.exclude_host   = eH;
 683                 evsel->attr.exclude_guest  = eG;
 684         }
 685
 686         return 0;
 687 }
 688
 689 static int parse_events__scanner(const char *str, void *data, int start_token)
 690 {
 691         YY_BUFFER_STATE buffer;
 692         void *scanner;
 693         int ret;
 694
 695         ret = parse_events_lex_init_extra(start_token, &scanner);
 696         if (ret)
 697                 return ret;
 698
 699         buffer = parse_events__scan_string(str, scanner);
 700
 701 #ifdef PARSER_DEBUG
 702         parse_events_debug = 1;
 703 #endif
 704         ret = parse_events_parse(data, scanner);
 705
 706         parse_events__flush_buffer(buffer, scanner);
 707         parse_events__delete_buffer(buffer, scanner);
 708         parse_events_lex_destroy(scanner);
 709         return ret;
 710 }
 711
 712 /*
 713  * parse event config string, return a list of event terms.
 714  */
 715 int parse_events_terms(struct list_head *terms, const char *str)
 716 {
 717         struct parse_events_data__terms data = {
 718                 .terms = NULL,
 719         };
 720         int ret;
 721
 722         ret = parse_events__scanner(str, &data, PE_START_TERMS);
 723         if (!ret) {
 724                 list_splice(data.terms, terms);
 725                 free(data.terms);
 726                 return 0;
 727         }
 728
 729         parse_events__free_terms(data.terms);
 730         return ret;
 731 }
 732
 733 int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
 734 {
 735         struct parse_events_data__events data = {
 736                 .list = LIST_HEAD_INIT(data.list),
 737                 .idx  = evlist->nr_entries,
 738         };
 739         int ret;
 740
 741         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 742         if (!ret) {
 743                 int entries = data.idx - evlist->nr_entries;
 744                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
 745                 return 0;
 746         }
 747
 748         /*
 749          * There are 2 users - builtin-record and builtin-test objects.
 750          * Both call perf_evlist__delete in case of error, so we dont
 751          * need to bother.
 752          */
 753         fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 754         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 755         return ret;
 756 }
 757
 758 int parse_events_option(const struct option *opt, const char *str,
 759                         int unset __used)
 760 {
 761         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 762         return parse_events(evlist, str, unset);
 763 }
 764
 765 int parse_filter(const struct option *opt, const char *str,
 766                  int unset __used)
 767 {
 768         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 769         struct perf_evsel *last = NULL;
 770
 771         if (evlist->nr_entries > 0)
 772                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 773
 774         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 775                 fprintf(stderr,
 776                         "-F option should follow a -e tracepoint option\n");
 777                 return -1;
 778         }
 779
 780         last->filter = strdup(str);
 781         if (last->filter == NULL) {
 782                 fprintf(stderr, "not enough memory to hold filter string\n");
 783                 return -1;
 784         }
 785
 786         return 0;
 787 }
 788
 789 static const char * const event_type_descriptors[] = {
 790         "Hardware event",
 791         "Software event",
 792         "Tracepoint event",
 793         "Hardware cache event",
 794         "Raw hardware event descriptor",
 795         "Hardware breakpoint",
 796 };
 797
 798 /*
 799  * Print the events from <debugfs_mount_point>/tracing/events
 800  */
 801
 802 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 803 {
 804         DIR *sys_dir, *evt_dir;
 805         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 806         char evt_path[MAXPATHLEN];
 807         char dir_path[MAXPATHLEN];
 808
 809         if (debugfs_valid_mountpoint(tracing_events_path))
 810                 return;
 811
 812         sys_dir = opendir(tracing_events_path);
 813         if (!sys_dir)
 814                 return;
 815
 816         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 817                 if (subsys_glob != NULL &&
 818                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 819                         continue;
 820
 821                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 822                          sys_dirent.d_name);
 823                 evt_dir = opendir(dir_path);
 824                 if (!evt_dir)
 825                         continue;
 826
 827                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 828                         if (event_glob != NULL &&
 829                             !strglobmatch(evt_dirent.d_name, event_glob))
 830                                 continue;
 831
 832                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 833                                  sys_dirent.d_name, evt_dirent.d_name);
 834                         printf("  %-50s [%s]\n", evt_path,
 835                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 836                 }
 837                 closedir(evt_dir);
 838         }
 839         closedir(sys_dir);
 840 }
 841
 842 /*
 843  * Check whether event is in <debugfs_mount_point>/tracing/events
 844  */
 845
 846 int is_valid_tracepoint(const char *event_string)
 847 {
 848         DIR *sys_dir, *evt_dir;
 849         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 850         char evt_path[MAXPATHLEN];
 851         char dir_path[MAXPATHLEN];
 852
 853         if (debugfs_valid_mountpoint(tracing_events_path))
 854                 return 0;
 855
 856         sys_dir = opendir(tracing_events_path);
 857         if (!sys_dir)
 858                 return 0;
 859
 860         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 861
 862                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 863                          sys_dirent.d_name);
 864                 evt_dir = opendir(dir_path);
 865                 if (!evt_dir)
 866                         continue;
 867
 868                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 869                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 870                                  sys_dirent.d_name, evt_dirent.d_name);
 871                         if (!strcmp(evt_path, event_string)) {
 872                                 closedir(evt_dir);
 873                                 closedir(sys_dir);
 874                                 return 1;
 875                         }
 876                 }
 877                 closedir(evt_dir);
 878         }
 879         closedir(sys_dir);
 880         return 0;
 881 }
 882
 883 static void __print_events_type(u8 type, struct event_symbol *syms,
 884                                 unsigned max)
 885 {
 886         char name[64];
 887         unsigned i;
 888
 889         for (i = 0; i < max ; i++, syms++) {
 890                 if (strlen(syms->alias))
 891                         snprintf(name, sizeof(name),  "%s OR %s",
 892                                  syms->symbol, syms->alias);
 893                 else
 894                         snprintf(name, sizeof(name), "%s", syms->symbol);
 895
 896                 printf("  %-50s [%s]\n", name,
 897                         event_type_descriptors[type]);
 898         }
 899 }
 900
 901 void print_events_type(u8 type)
 902 {
 903         if (type == PERF_TYPE_SOFTWARE)
 904                 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
 905         else
 906                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
 907 }
 908
 909 int print_hwcache_events(const char *event_glob)
 910 {
 911         unsigned int type, op, i, printed = 0;
 912         char name[64];
 913
 914         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 915                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 916                         /* skip invalid cache type */
 917                         if (!perf_evsel__is_cache_op_valid(type, op))
 918                                 continue;
 919
 920                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 921                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
 922                                                                         name, sizeof(name));
 923                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
 924                                         continue;
 925
 926                                 printf("  %-50s [%s]\n", name,
 927                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
 928                                 ++printed;
 929                         }
 930                 }
 931         }
 932
 933         return printed;
 934 }
 935
 936 static void print_symbol_events(const char *event_glob, unsigned type,
 937                                 struct event_symbol *syms, unsigned max)
 938 {
 939         unsigned i, printed = 0;
 940         char name[MAX_NAME_LEN];
 941
 942         for (i = 0; i < max; i++, syms++) {
 943
 944                 if (event_glob != NULL &&
 945                     !(strglobmatch(syms->symbol, event_glob) ||
 946                       (syms->alias && strglobmatch(syms->alias, event_glob))))
 947                         continue;
 948
 949                 if (strlen(syms->alias))
 950                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
 951                 else
 952                         strncpy(name, syms->symbol, MAX_NAME_LEN);
 953
 954                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
 955
 956                 printed++;
 957         }
 958
 959         if (printed)
 960                 printf("\n");
 961 }
 962
 963 /*
 964  * Print the help text for the event symbols:
 965  */
 966 void print_events(const char *event_glob)
 967 {
 968
 969         printf("\n");
 970         printf("List of pre-defined events (to be used in -e):\n");
 971
 972         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
 973                             event_symbols_hw, PERF_COUNT_HW_MAX);
 974
 975         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
 976                             event_symbols_sw, PERF_COUNT_SW_MAX);
 977
 978         print_hwcache_events(event_glob);
 979
 980         if (event_glob != NULL)
 981                 return;
 982
 983         printf("\n");
 984         printf("  %-50s [%s]\n",
 985                "rNNN",
 986                event_type_descriptors[PERF_TYPE_RAW]);
 987         printf("  %-50s [%s]\n",
 988                "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
 989                event_type_descriptors[PERF_TYPE_RAW]);
 990         printf("   (see 'perf list --help' on how to encode it)\n");
 991         printf("\n");
 992
 993         printf("  %-50s [%s]\n",
 994                         "mem:<addr>[:access]",
 995                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
 996         printf("\n");
 997
 998         print_tracepoint_events(NULL, NULL);
 999 }
1000
1001 int parse_events__is_hardcoded_term(struct parse_events__term *term)
1002 {
1003         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1004 }
1005
1006 static int new_term(struct parse_events__term **_term, int type_val,
1007                     int type_term, char *config,
1008                     char *str, long num)
1009 {
1010         struct parse_events__term *term;
1011
1012         term = zalloc(sizeof(*term));
1013         if (!term)
1014                 return -ENOMEM;
1015
1016         INIT_LIST_HEAD(&term->list);
1017         term->type_val  = type_val;
1018         term->type_term = type_term;
1019         term->config = config;
1020
1021         switch (type_val) {
1022         case PARSE_EVENTS__TERM_TYPE_NUM:
1023                 term->val.num = num;
1024                 break;
1025         case PARSE_EVENTS__TERM_TYPE_STR:
1026                 term->val.str = str;
1027                 break;
1028         default:
1029                 return -EINVAL;
1030         }
1031
1032         *_term = term;
1033         return 0;
1034 }
1035
1036 int parse_events__term_num(struct parse_events__term **term,
1037                            int type_term, char *config, long num)
1038 {
1039         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1040                         config, NULL, num);
1041 }
1042
1043 int parse_events__term_str(struct parse_events__term **term,
1044                            int type_term, char *config, char *str)
1045 {
1046         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1047                         config, str, 0);
1048 }
1049
1050 int parse_events__term_clone(struct parse_events__term **new,
1051                              struct parse_events__term *term)
1052 {
1053         return new_term(new, term->type_val, term->type_term, term->config,
1054                         term->val.str, term->val.num);
1055 }
1056
1057 void parse_events__free_terms(struct list_head *terms)
1058 {
1059         struct parse_events__term *term, *h;
1060
1061         list_for_each_entry_safe(term, h, terms, list)
1062                 free(term);
1063
1064         free(terms);
1065 }