Pileus Git - ~andy/linux/blob - 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_period = 1;
 381
 382         snprintf(name, MAX_NAME_LEN, "%s:%s", sys_name, evt_name);
 383         return add_event(list, idx, &attr, name);
 384 }
 385
 386 static int add_tracepoint_multi(struct list_head **list, int *idx,
 387                                 char *sys_name, char *evt_name)
 388 {
 389         char evt_path[MAXPATHLEN];
 390         struct dirent *evt_ent;
 391         DIR *evt_dir;
 392         int ret = 0;
 393
 394         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 395         evt_dir = opendir(evt_path);
 396         if (!evt_dir) {
 397                 perror("Can't open event dir");
 398                 return -1;
 399         }
 400
 401         while (!ret && (evt_ent = readdir(evt_dir))) {
 402                 if (!strcmp(evt_ent->d_name, ".")
 403                     || !strcmp(evt_ent->d_name, "..")
 404                     || !strcmp(evt_ent->d_name, "enable")
 405                     || !strcmp(evt_ent->d_name, "filter"))
 406                         continue;
 407
 408                 if (!strglobmatch(evt_ent->d_name, evt_name))
 409                         continue;
 410
 411                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 412         }
 413
 414         return ret;
 415 }
 416
 417 int parse_events_add_tracepoint(struct list_head **list, int *idx,
 418                                 char *sys, char *event)
 419 {
 420         int ret;
 421
 422         ret = debugfs_valid_mountpoint(tracing_events_path);
 423         if (ret)
 424                 return ret;
 425
 426         return strpbrk(event, "*?") ?
 427                add_tracepoint_multi(list, idx, sys, event) :
 428                add_tracepoint(list, idx, sys, event);
 429 }
 430
 431 static int
 432 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 433 {
 434         int i;
 435
 436         for (i = 0; i < 3; i++) {
 437                 if (!type || !type[i])
 438                         break;
 439
 440 #define CHECK_SET_TYPE(bit)             \
 441 do {                                    \
 442         if (attr->bp_type & bit)        \
 443                 return -EINVAL;         \
 444         else                            \
 445                 attr->bp_type |= bit;   \
 446 } while (0)
 447
 448                 switch (type[i]) {
 449                 case 'r':
 450                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 451                         break;
 452                 case 'w':
 453                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 454                         break;
 455                 case 'x':
 456                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 457                         break;
 458                 default:
 459                         return -EINVAL;
 460                 }
 461         }
 462
 463 #undef CHECK_SET_TYPE
 464
 465         if (!attr->bp_type) /* Default */
 466                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 467
 468         return 0;
 469 }
 470
 471 int parse_events_add_breakpoint(struct list_head **list, int *idx,
 472                                 void *ptr, char *type)
 473 {
 474         struct perf_event_attr attr;
 475
 476         memset(&attr, 0, sizeof(attr));
 477         attr.bp_addr = (unsigned long) ptr;
 478
 479         if (parse_breakpoint_type(type, &attr))
 480                 return -EINVAL;
 481
 482         /*
 483          * We should find a nice way to override the access length
 484          * Provide some defaults for now
 485          */
 486         if (attr.bp_type == HW_BREAKPOINT_X)
 487                 attr.bp_len = sizeof(long);
 488         else
 489                 attr.bp_len = HW_BREAKPOINT_LEN_4;
 490
 491         attr.type = PERF_TYPE_BREAKPOINT;
 492
 493         return add_event(list, idx, &attr, NULL);
 494 }
 495
 496 static int config_term(struct perf_event_attr *attr,
 497                        struct parse_events__term *term)
 498 {
 499 #define CHECK_TYPE_VAL(type)                                    \
 500 do {                                                            \
 501         if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
 502                 return -EINVAL;                                 \
 503 } while (0)
 504
 505         switch (term->type_term) {
 506         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 507                 CHECK_TYPE_VAL(NUM);
 508                 attr->config = term->val.num;
 509                 break;
 510         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 511                 CHECK_TYPE_VAL(NUM);
 512                 attr->config1 = term->val.num;
 513                 break;
 514         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 515                 CHECK_TYPE_VAL(NUM);
 516                 attr->config2 = term->val.num;
 517                 break;
 518         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 519                 CHECK_TYPE_VAL(NUM);
 520                 attr->sample_period = term->val.num;
 521                 break;
 522         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 523                 /*
 524                  * TODO uncomment when the field is available
 525                  * attr->branch_sample_type = term->val.num;
 526                  */
 527                 break;
 528         case PARSE_EVENTS__TERM_TYPE_NAME:
 529                 CHECK_TYPE_VAL(STR);
 530                 break;
 531         default:
 532                 return -EINVAL;
 533         }
 534
 535         return 0;
 536 #undef CHECK_TYPE_VAL
 537 }
 538
 539 static int config_attr(struct perf_event_attr *attr,
 540                        struct list_head *head, int fail)
 541 {
 542         struct parse_events__term *term;
 543
 544         list_for_each_entry(term, head, list)
 545                 if (config_term(attr, term) && fail)
 546                         return -EINVAL;
 547
 548         return 0;
 549 }
 550
 551 int parse_events_add_numeric(struct list_head **list, int *idx,
 552                              unsigned long type, unsigned long config,
 553                              struct list_head *head_config)
 554 {
 555         struct perf_event_attr attr;
 556
 557         memset(&attr, 0, sizeof(attr));
 558         attr.type = type;
 559         attr.config = config;
 560
 561         if (head_config &&
 562             config_attr(&attr, head_config, 1))
 563                 return -EINVAL;
 564
 565         return add_event(list, idx, &attr, NULL);
 566 }
 567
 568 static int parse_events__is_name_term(struct parse_events__term *term)
 569 {
 570         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 571 }
 572
 573 static char *pmu_event_name(struct list_head *head_terms)
 574 {
 575         struct parse_events__term *term;
 576
 577         list_for_each_entry(term, head_terms, list)
 578                 if (parse_events__is_name_term(term))
 579                         return term->val.str;
 580
 581         return NULL;
 582 }
 583
 584 int parse_events_add_pmu(struct list_head **list, int *idx,
 585                          char *name, struct list_head *head_config)
 586 {
 587         struct perf_event_attr attr;
 588         struct perf_pmu *pmu;
 589
 590         pmu = perf_pmu__find(name);
 591         if (!pmu)
 592                 return -EINVAL;
 593
 594         memset(&attr, 0, sizeof(attr));
 595
 596         if (perf_pmu__check_alias(pmu, head_config))
 597                 return -EINVAL;
 598
 599         /*
 600          * Configure hardcoded terms first, no need to check
 601          * return value when called with fail == 0 ;)
 602          */
 603         config_attr(&attr, head_config, 0);
 604
 605         if (perf_pmu__config(pmu, &attr, head_config))
 606                 return -EINVAL;
 607
 608         return add_event(list, idx, &attr,
 609                          pmu_event_name(head_config));
 610 }
 611
 612 void parse_events_update_lists(struct list_head *list_event,
 613                                struct list_head *list_all)
 614 {
 615         /*
 616          * Called for single event definition. Update the
 617          * 'all event' list, and reinit the 'signle event'
 618          * list, for next event definition.
 619          */
 620         list_splice_tail(list_event, list_all);
 621         free(list_event);
 622 }
 623
 624 int parse_events_modifier(struct list_head *list, char *str)
 625 {
 626         struct perf_evsel *evsel;
 627         int exclude = 0, exclude_GH = 0;
 628         int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
 629
 630         if (str == NULL)
 631                 return 0;
 632
 633         while (*str) {
 634                 if (*str == 'u') {
 635                         if (!exclude)
 636                                 exclude = eu = ek = eh = 1;
 637                         eu = 0;
 638                 } else if (*str == 'k') {
 639                         if (!exclude)
 640                                 exclude = eu = ek = eh = 1;
 641                         ek = 0;
 642                 } else if (*str == 'h') {
 643                         if (!exclude)
 644                                 exclude = eu = ek = eh = 1;
 645                         eh = 0;
 646                 } else if (*str == 'G') {
 647                         if (!exclude_GH)
 648                                 exclude_GH = eG = eH = 1;
 649                         eG = 0;
 650                 } else if (*str == 'H') {
 651                         if (!exclude_GH)
 652                                 exclude_GH = eG = eH = 1;
 653                         eH = 0;
 654                 } else if (*str == 'p') {
 655                         precise++;
 656                 } else
 657                         break;
 658
 659                 ++str;
 660         }
 661
 662         /*
 663          * precise ip:
 664          *
 665          *  0 - SAMPLE_IP can have arbitrary skid
 666          *  1 - SAMPLE_IP must have constant skid
 667          *  2 - SAMPLE_IP requested to have 0 skid
 668          *  3 - SAMPLE_IP must have 0 skid
 669          *
 670          *  See also PERF_RECORD_MISC_EXACT_IP
 671          */
 672         if (precise > 3)
 673                 return -EINVAL;
 674
 675         list_for_each_entry(evsel, list, node) {
 676                 evsel->attr.exclude_user   = eu;
 677                 evsel->attr.exclude_kernel = ek;
 678                 evsel->attr.exclude_hv     = eh;
 679                 evsel->attr.precise_ip     = precise;
 680                 evsel->attr.exclude_host   = eH;
 681                 evsel->attr.exclude_guest  = eG;
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int parse_events__scanner(const char *str, void *data, int start_token)
 688 {
 689         YY_BUFFER_STATE buffer;
 690         void *scanner;
 691         int ret;
 692
 693         ret = parse_events_lex_init_extra(start_token, &scanner);
 694         if (ret)
 695                 return ret;
 696
 697         buffer = parse_events__scan_string(str, scanner);
 698
 699 #ifdef PARSER_DEBUG
 700         parse_events_debug = 1;
 701 #endif
 702         ret = parse_events_parse(data, scanner);
 703
 704         parse_events__flush_buffer(buffer, scanner);
 705         parse_events__delete_buffer(buffer, scanner);
 706         parse_events_lex_destroy(scanner);
 707         return ret;
 708 }
 709
 710 /*
 711  * parse event config string, return a list of event terms.
 712  */
 713 int parse_events_terms(struct list_head *terms, const char *str)
 714 {
 715         struct parse_events_data__terms data = {
 716                 .terms = NULL,
 717         };
 718         int ret;
 719
 720         ret = parse_events__scanner(str, &data, PE_START_TERMS);
 721         if (!ret) {
 722                 list_splice(data.terms, terms);
 723                 free(data.terms);
 724                 return 0;
 725         }
 726
 727         parse_events__free_terms(data.terms);
 728         return ret;
 729 }
 730
 731 int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
 732 {
 733         struct parse_events_data__events data = {
 734                 .list = LIST_HEAD_INIT(data.list),
 735                 .idx  = evlist->nr_entries,
 736         };
 737         int ret;
 738
 739         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 740         if (!ret) {
 741                 int entries = data.idx - evlist->nr_entries;
 742                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
 743                 return 0;
 744         }
 745
 746         /*
 747          * There are 2 users - builtin-record and builtin-test objects.
 748          * Both call perf_evlist__delete in case of error, so we dont
 749          * need to bother.
 750          */
 751         fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 752         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 753         return ret;
 754 }
 755
 756 int parse_events_option(const struct option *opt, const char *str,
 757                         int unset __used)
 758 {
 759         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 760         return parse_events(evlist, str, unset);
 761 }
 762
 763 int parse_filter(const struct option *opt, const char *str,
 764                  int unset __used)
 765 {
 766         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 767         struct perf_evsel *last = NULL;
 768
 769         if (evlist->nr_entries > 0)
 770                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 771
 772         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 773                 fprintf(stderr,
 774                         "-F option should follow a -e tracepoint option\n");
 775                 return -1;
 776         }
 777
 778         last->filter = strdup(str);
 779         if (last->filter == NULL) {
 780                 fprintf(stderr, "not enough memory to hold filter string\n");
 781                 return -1;
 782         }
 783
 784         return 0;
 785 }
 786
 787 static const char * const event_type_descriptors[] = {
 788         "Hardware event",
 789         "Software event",
 790         "Tracepoint event",
 791         "Hardware cache event",
 792         "Raw hardware event descriptor",
 793         "Hardware breakpoint",
 794 };
 795
 796 /*
 797  * Print the events from <debugfs_mount_point>/tracing/events
 798  */
 799
 800 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 801 {
 802         DIR *sys_dir, *evt_dir;
 803         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 804         char evt_path[MAXPATHLEN];
 805         char dir_path[MAXPATHLEN];
 806
 807         if (debugfs_valid_mountpoint(tracing_events_path))
 808                 return;
 809
 810         sys_dir = opendir(tracing_events_path);
 811         if (!sys_dir)
 812                 return;
 813
 814         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 815                 if (subsys_glob != NULL &&
 816                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 817                         continue;
 818
 819                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 820                          sys_dirent.d_name);
 821                 evt_dir = opendir(dir_path);
 822                 if (!evt_dir)
 823                         continue;
 824
 825                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 826                         if (event_glob != NULL &&
 827                             !strglobmatch(evt_dirent.d_name, event_glob))
 828                                 continue;
 829
 830                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 831                                  sys_dirent.d_name, evt_dirent.d_name);
 832                         printf("  %-50s [%s]\n", evt_path,
 833                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 834                 }
 835                 closedir(evt_dir);
 836         }
 837         closedir(sys_dir);
 838 }
 839
 840 /*
 841  * Check whether event is in <debugfs_mount_point>/tracing/events
 842  */
 843
 844 int is_valid_tracepoint(const char *event_string)
 845 {
 846         DIR *sys_dir, *evt_dir;
 847         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 848         char evt_path[MAXPATHLEN];
 849         char dir_path[MAXPATHLEN];
 850
 851         if (debugfs_valid_mountpoint(tracing_events_path))
 852                 return 0;
 853
 854         sys_dir = opendir(tracing_events_path);
 855         if (!sys_dir)
 856                 return 0;
 857
 858         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 859
 860                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 861                          sys_dirent.d_name);
 862                 evt_dir = opendir(dir_path);
 863                 if (!evt_dir)
 864                         continue;
 865
 866                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 867                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 868                                  sys_dirent.d_name, evt_dirent.d_name);
 869                         if (!strcmp(evt_path, event_string)) {
 870                                 closedir(evt_dir);
 871                                 closedir(sys_dir);
 872                                 return 1;
 873                         }
 874                 }
 875                 closedir(evt_dir);
 876         }
 877         closedir(sys_dir);
 878         return 0;
 879 }
 880
 881 static void __print_events_type(u8 type, struct event_symbol *syms,
 882                                 unsigned max)
 883 {
 884         char name[64];
 885         unsigned i;
 886
 887         for (i = 0; i < max ; i++, syms++) {
 888                 if (strlen(syms->alias))
 889                         snprintf(name, sizeof(name),  "%s OR %s",
 890                                  syms->symbol, syms->alias);
 891                 else
 892                         snprintf(name, sizeof(name), "%s", syms->symbol);
 893
 894                 printf("  %-50s [%s]\n", name,
 895                         event_type_descriptors[type]);
 896         }
 897 }
 898
 899 void print_events_type(u8 type)
 900 {
 901         if (type == PERF_TYPE_SOFTWARE)
 902                 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
 903         else
 904                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
 905 }
 906
 907 int print_hwcache_events(const char *event_glob)
 908 {
 909         unsigned int type, op, i, printed = 0;
 910         char name[64];
 911
 912         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 913                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 914                         /* skip invalid cache type */
 915                         if (!perf_evsel__is_cache_op_valid(type, op))
 916                                 continue;
 917
 918                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 919                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
 920                                                                         name, sizeof(name));
 921                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
 922                                         continue;
 923
 924                                 printf("  %-50s [%s]\n", name,
 925                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
 926                                 ++printed;
 927                         }
 928                 }
 929         }
 930
 931         return printed;
 932 }
 933
 934 static void print_symbol_events(const char *event_glob, unsigned type,
 935                                 struct event_symbol *syms, unsigned max)
 936 {
 937         unsigned i, printed = 0;
 938         char name[MAX_NAME_LEN];
 939
 940         for (i = 0; i < max; i++, syms++) {
 941
 942                 if (event_glob != NULL &&
 943                     !(strglobmatch(syms->symbol, event_glob) ||
 944                       (syms->alias && strglobmatch(syms->alias, event_glob))))
 945                         continue;
 946
 947                 if (strlen(syms->alias))
 948                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
 949                 else
 950                         strncpy(name, syms->symbol, MAX_NAME_LEN);
 951
 952                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
 953
 954                 printed++;
 955         }
 956
 957         if (printed)
 958                 printf("\n");
 959 }
 960
 961 /*
 962  * Print the help text for the event symbols:
 963  */
 964 void print_events(const char *event_glob)
 965 {
 966
 967         printf("\n");
 968         printf("List of pre-defined events (to be used in -e):\n");
 969
 970         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
 971                             event_symbols_hw, PERF_COUNT_HW_MAX);
 972
 973         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
 974                             event_symbols_sw, PERF_COUNT_SW_MAX);
 975
 976         print_hwcache_events(event_glob);
 977
 978         if (event_glob != NULL)
 979                 return;
 980
 981         printf("\n");
 982         printf("  %-50s [%s]\n",
 983                "rNNN",
 984                event_type_descriptors[PERF_TYPE_RAW]);
 985         printf("  %-50s [%s]\n",
 986                "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
 987                event_type_descriptors[PERF_TYPE_RAW]);
 988         printf("   (see 'perf list --help' on how to encode it)\n");
 989         printf("\n");
 990
 991         printf("  %-50s [%s]\n",
 992                         "mem:<addr>[:access]",
 993                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
 994         printf("\n");
 995
 996         print_tracepoint_events(NULL, NULL);
 997 }
 998
 999 int parse_events__is_hardcoded_term(struct parse_events__term *term)
1000 {
1001         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1002 }
1003
1004 static int new_term(struct parse_events__term **_term, int type_val,
1005                     int type_term, char *config,
1006                     char *str, long num)
1007 {
1008         struct parse_events__term *term;
1009
1010         term = zalloc(sizeof(*term));
1011         if (!term)
1012                 return -ENOMEM;
1013
1014         INIT_LIST_HEAD(&term->list);
1015         term->type_val  = type_val;
1016         term->type_term = type_term;
1017         term->config = config;
1018
1019         switch (type_val) {
1020         case PARSE_EVENTS__TERM_TYPE_NUM:
1021                 term->val.num = num;
1022                 break;
1023         case PARSE_EVENTS__TERM_TYPE_STR:
1024                 term->val.str = str;
1025                 break;
1026         default:
1027                 return -EINVAL;
1028         }
1029
1030         *_term = term;
1031         return 0;
1032 }
1033
1034 int parse_events__term_num(struct parse_events__term **term,
1035                            int type_term, char *config, long num)
1036 {
1037         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1038                         config, NULL, num);
1039 }
1040
1041 int parse_events__term_str(struct parse_events__term **term,
1042                            int type_term, char *config, char *str)
1043 {
1044         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1045                         config, str, 0);
1046 }
1047
1048 int parse_events__term_clone(struct parse_events__term **new,
1049                              struct parse_events__term *term)
1050 {
1051         return new_term(new, term->type_val, term->type_term, term->config,
1052                         term->val.str, term->val.num);
1053 }
1054
1055 void parse_events__free_terms(struct list_head *terms)
1056 {
1057         struct parse_events__term *term, *h;
1058
1059         list_for_each_entry_safe(term, h, terms, list)
1060                 free(term);
1061
1062         free(terms);
1063 }