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 "linux/string.h"
  10 #include "symbol.h"
  11 #include "cache.h"
  12 #include "header.h"
  13 #include <api/fs/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 #include "thread_map.h"
  19
  20 #define MAX_NAME_LEN 100
  21
  22 struct event_symbol {
  23         const char      *symbol;
  24         const char      *alias;
  25 };
  26
  27 #ifdef PARSER_DEBUG
  28 extern int parse_events_debug;
  29 #endif
  30 int parse_events_parse(void *data, void *scanner);
  31
  32 static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  33         [PERF_COUNT_HW_CPU_CYCLES] = {
  34                 .symbol = "cpu-cycles",
  35                 .alias  = "cycles",
  36         },
  37         [PERF_COUNT_HW_INSTRUCTIONS] = {
  38                 .symbol = "instructions",
  39                 .alias  = "",
  40         },
  41         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  42                 .symbol = "cache-references",
  43                 .alias  = "",
  44         },
  45         [PERF_COUNT_HW_CACHE_MISSES] = {
  46                 .symbol = "cache-misses",
  47                 .alias  = "",
  48         },
  49         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  50                 .symbol = "branch-instructions",
  51                 .alias  = "branches",
  52         },
  53         [PERF_COUNT_HW_BRANCH_MISSES] = {
  54                 .symbol = "branch-misses",
  55                 .alias  = "",
  56         },
  57         [PERF_COUNT_HW_BUS_CYCLES] = {
  58                 .symbol = "bus-cycles",
  59                 .alias  = "",
  60         },
  61         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  62                 .symbol = "stalled-cycles-frontend",
  63                 .alias  = "idle-cycles-frontend",
  64         },
  65         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  66                 .symbol = "stalled-cycles-backend",
  67                 .alias  = "idle-cycles-backend",
  68         },
  69         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  70                 .symbol = "ref-cycles",
  71                 .alias  = "",
  72         },
  73 };
  74
  75 static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  76         [PERF_COUNT_SW_CPU_CLOCK] = {
  77                 .symbol = "cpu-clock",
  78                 .alias  = "",
  79         },
  80         [PERF_COUNT_SW_TASK_CLOCK] = {
  81                 .symbol = "task-clock",
  82                 .alias  = "",
  83         },
  84         [PERF_COUNT_SW_PAGE_FAULTS] = {
  85                 .symbol = "page-faults",
  86                 .alias  = "faults",
  87         },
  88         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  89                 .symbol = "context-switches",
  90                 .alias  = "cs",
  91         },
  92         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
  93                 .symbol = "cpu-migrations",
  94                 .alias  = "migrations",
  95         },
  96         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
  97                 .symbol = "minor-faults",
  98                 .alias  = "",
  99         },
 100         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 101                 .symbol = "major-faults",
 102                 .alias  = "",
 103         },
 104         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 105                 .symbol = "alignment-faults",
 106                 .alias  = "",
 107         },
 108         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 109                 .symbol = "emulation-faults",
 110                 .alias  = "",
 111         },
 112         [PERF_COUNT_SW_DUMMY] = {
 113                 .symbol = "dummy",
 114                 .alias  = "",
 115         },
 116 };
 117
 118 #define __PERF_EVENT_FIELD(config, name) \
 119         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 120
 121 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 122 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 123 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 124 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 125
 126 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 127         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 128         if (sys_dirent.d_type == DT_DIR &&                                     \
 129            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 130            (strcmp(sys_dirent.d_name, "..")))
 131
 132 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 133 {
 134         char evt_path[MAXPATHLEN];
 135         int fd;
 136
 137         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 138                         sys_dir->d_name, evt_dir->d_name);
 139         fd = open(evt_path, O_RDONLY);
 140         if (fd < 0)
 141                 return -EINVAL;
 142         close(fd);
 143
 144         return 0;
 145 }
 146
 147 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 148         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 149         if (evt_dirent.d_type == DT_DIR &&                                     \
 150            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 151            (strcmp(evt_dirent.d_name, "..")) &&                                \
 152            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 153
 154 #define MAX_EVENT_LENGTH 512
 155
 156
 157 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 158 {
 159         struct tracepoint_path *path = NULL;
 160         DIR *sys_dir, *evt_dir;
 161         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 162         char id_buf[24];
 163         int fd;
 164         u64 id;
 165         char evt_path[MAXPATHLEN];
 166         char dir_path[MAXPATHLEN];
 167
 168         if (debugfs_valid_mountpoint(tracing_events_path))
 169                 return NULL;
 170
 171         sys_dir = opendir(tracing_events_path);
 172         if (!sys_dir)
 173                 return NULL;
 174
 175         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 176
 177                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 178                          sys_dirent.d_name);
 179                 evt_dir = opendir(dir_path);
 180                 if (!evt_dir)
 181                         continue;
 182
 183                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 184
 185                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 186                                  evt_dirent.d_name);
 187                         fd = open(evt_path, O_RDONLY);
 188                         if (fd < 0)
 189                                 continue;
 190                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 191                                 close(fd);
 192                                 continue;
 193                         }
 194                         close(fd);
 195                         id = atoll(id_buf);
 196                         if (id == config) {
 197                                 closedir(evt_dir);
 198                                 closedir(sys_dir);
 199                                 path = zalloc(sizeof(*path));
 200                                 path->system = malloc(MAX_EVENT_LENGTH);
 201                                 if (!path->system) {
 202                                         free(path);
 203                                         return NULL;
 204                                 }
 205                                 path->name = malloc(MAX_EVENT_LENGTH);
 206                                 if (!path->name) {
 207                                         zfree(&path->system);
 208                                         free(path);
 209                                         return NULL;
 210                                 }
 211                                 strncpy(path->system, sys_dirent.d_name,
 212                                         MAX_EVENT_LENGTH);
 213                                 strncpy(path->name, evt_dirent.d_name,
 214                                         MAX_EVENT_LENGTH);
 215                                 return path;
 216                         }
 217                 }
 218                 closedir(evt_dir);
 219         }
 220
 221         closedir(sys_dir);
 222         return NULL;
 223 }
 224
 225 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 226 {
 227         struct tracepoint_path *path = zalloc(sizeof(*path));
 228         char *str = strchr(name, ':');
 229
 230         if (path == NULL || str == NULL) {
 231                 free(path);
 232                 return NULL;
 233         }
 234
 235         path->system = strndup(name, str - name);
 236         path->name = strdup(str+1);
 237
 238         if (path->system == NULL || path->name == NULL) {
 239                 zfree(&path->system);
 240                 zfree(&path->name);
 241                 free(path);
 242                 path = NULL;
 243         }
 244
 245         return path;
 246 }
 247
 248 const char *event_type(int type)
 249 {
 250         switch (type) {
 251         case PERF_TYPE_HARDWARE:
 252                 return "hardware";
 253
 254         case PERF_TYPE_SOFTWARE:
 255                 return "software";
 256
 257         case PERF_TYPE_TRACEPOINT:
 258                 return "tracepoint";
 259
 260         case PERF_TYPE_HW_CACHE:
 261                 return "hardware-cache";
 262
 263         default:
 264                 break;
 265         }
 266
 267         return "unknown";
 268 }
 269
 270
 271
 272 static struct perf_evsel *
 273 __add_event(struct list_head *list, int *idx,
 274             struct perf_event_attr *attr,
 275             char *name, struct cpu_map *cpus)
 276 {
 277         struct perf_evsel *evsel;
 278
 279         event_attr_init(attr);
 280
 281         evsel = perf_evsel__new_idx(attr, (*idx)++);
 282         if (!evsel)
 283                 return NULL;
 284
 285         evsel->cpus = cpus;
 286         if (name)
 287                 evsel->name = strdup(name);
 288         list_add_tail(&evsel->node, list);
 289         return evsel;
 290 }
 291
 292 static int add_event(struct list_head *list, int *idx,
 293                      struct perf_event_attr *attr, char *name)
 294 {
 295         return __add_event(list, idx, attr, name, NULL) ? 0 : -ENOMEM;
 296 }
 297
 298 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 299 {
 300         int i, j;
 301         int n, longest = -1;
 302
 303         for (i = 0; i < size; i++) {
 304                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 305                         n = strlen(names[i][j]);
 306                         if (n > longest && !strncasecmp(str, names[i][j], n))
 307                                 longest = n;
 308                 }
 309                 if (longest > 0)
 310                         return i;
 311         }
 312
 313         return -1;
 314 }
 315
 316 int parse_events_add_cache(struct list_head *list, int *idx,
 317                            char *type, char *op_result1, char *op_result2)
 318 {
 319         struct perf_event_attr attr;
 320         char name[MAX_NAME_LEN];
 321         int cache_type = -1, cache_op = -1, cache_result = -1;
 322         char *op_result[2] = { op_result1, op_result2 };
 323         int i, n;
 324
 325         /*
 326          * No fallback - if we cannot get a clear cache type
 327          * then bail out:
 328          */
 329         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 330                                    PERF_COUNT_HW_CACHE_MAX);
 331         if (cache_type == -1)
 332                 return -EINVAL;
 333
 334         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 335
 336         for (i = 0; (i < 2) && (op_result[i]); i++) {
 337                 char *str = op_result[i];
 338
 339                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 340
 341                 if (cache_op == -1) {
 342                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 343                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 344                         if (cache_op >= 0) {
 345                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 346                                         return -EINVAL;
 347                                 continue;
 348                         }
 349                 }
 350
 351                 if (cache_result == -1) {
 352                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 353                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 354                         if (cache_result >= 0)
 355                                 continue;
 356                 }
 357         }
 358
 359         /*
 360          * Fall back to reads:
 361          */
 362         if (cache_op == -1)
 363                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 364
 365         /*
 366          * Fall back to accesses:
 367          */
 368         if (cache_result == -1)
 369                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 370
 371         memset(&attr, 0, sizeof(attr));
 372         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 373         attr.type = PERF_TYPE_HW_CACHE;
 374         return add_event(list, idx, &attr, name);
 375 }
 376
 377 static int add_tracepoint(struct list_head *list, int *idx,
 378                           char *sys_name, char *evt_name)
 379 {
 380         struct perf_evsel *evsel;
 381
 382         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 383         if (!evsel)
 384                 return -ENOMEM;
 385
 386         list_add_tail(&evsel->node, list);
 387
 388         return 0;
 389 }
 390
 391 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 392                                       char *sys_name, char *evt_name)
 393 {
 394         char evt_path[MAXPATHLEN];
 395         struct dirent *evt_ent;
 396         DIR *evt_dir;
 397         int ret = 0;
 398
 399         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 400         evt_dir = opendir(evt_path);
 401         if (!evt_dir) {
 402                 perror("Can't open event dir");
 403                 return -1;
 404         }
 405
 406         while (!ret && (evt_ent = readdir(evt_dir))) {
 407                 if (!strcmp(evt_ent->d_name, ".")
 408                     || !strcmp(evt_ent->d_name, "..")
 409                     || !strcmp(evt_ent->d_name, "enable")
 410                     || !strcmp(evt_ent->d_name, "filter"))
 411                         continue;
 412
 413                 if (!strglobmatch(evt_ent->d_name, evt_name))
 414                         continue;
 415
 416                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 417         }
 418
 419         closedir(evt_dir);
 420         return ret;
 421 }
 422
 423 static int add_tracepoint_event(struct list_head *list, int *idx,
 424                                 char *sys_name, char *evt_name)
 425 {
 426         return strpbrk(evt_name, "*?") ?
 427                add_tracepoint_multi_event(list, idx, sys_name, evt_name) :
 428                add_tracepoint(list, idx, sys_name, evt_name);
 429 }
 430
 431 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 432                                     char *sys_name, char *evt_name)
 433 {
 434         struct dirent *events_ent;
 435         DIR *events_dir;
 436         int ret = 0;
 437
 438         events_dir = opendir(tracing_events_path);
 439         if (!events_dir) {
 440                 perror("Can't open event dir");
 441                 return -1;
 442         }
 443
 444         while (!ret && (events_ent = readdir(events_dir))) {
 445                 if (!strcmp(events_ent->d_name, ".")
 446                     || !strcmp(events_ent->d_name, "..")
 447                     || !strcmp(events_ent->d_name, "enable")
 448                     || !strcmp(events_ent->d_name, "header_event")
 449                     || !strcmp(events_ent->d_name, "header_page"))
 450                         continue;
 451
 452                 if (!strglobmatch(events_ent->d_name, sys_name))
 453                         continue;
 454
 455                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 456                                            evt_name);
 457         }
 458
 459         closedir(events_dir);
 460         return ret;
 461 }
 462
 463 int parse_events_add_tracepoint(struct list_head *list, int *idx,
 464                                 char *sys, char *event)
 465 {
 466         int ret;
 467
 468         ret = debugfs_valid_mountpoint(tracing_events_path);
 469         if (ret)
 470                 return ret;
 471
 472         if (strpbrk(sys, "*?"))
 473                 return add_tracepoint_multi_sys(list, idx, sys, event);
 474         else
 475                 return add_tracepoint_event(list, idx, sys, event);
 476 }
 477
 478 static int
 479 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 480 {
 481         int i;
 482
 483         for (i = 0; i < 3; i++) {
 484                 if (!type || !type[i])
 485                         break;
 486
 487 #define CHECK_SET_TYPE(bit)             \
 488 do {                                    \
 489         if (attr->bp_type & bit)        \
 490                 return -EINVAL;         \
 491         else                            \
 492                 attr->bp_type |= bit;   \
 493 } while (0)
 494
 495                 switch (type[i]) {
 496                 case 'r':
 497                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 498                         break;
 499                 case 'w':
 500                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 501                         break;
 502                 case 'x':
 503                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 504                         break;
 505                 default:
 506                         return -EINVAL;
 507                 }
 508         }
 509
 510 #undef CHECK_SET_TYPE
 511
 512         if (!attr->bp_type) /* Default */
 513                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 514
 515         return 0;
 516 }
 517
 518 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 519                                 void *ptr, char *type)
 520 {
 521         struct perf_event_attr attr;
 522
 523         memset(&attr, 0, sizeof(attr));
 524         attr.bp_addr = (unsigned long) ptr;
 525
 526         if (parse_breakpoint_type(type, &attr))
 527                 return -EINVAL;
 528
 529         /*
 530          * We should find a nice way to override the access length
 531          * Provide some defaults for now
 532          */
 533         if (attr.bp_type == HW_BREAKPOINT_X)
 534                 attr.bp_len = sizeof(long);
 535         else
 536                 attr.bp_len = HW_BREAKPOINT_LEN_4;
 537
 538         attr.type = PERF_TYPE_BREAKPOINT;
 539         attr.sample_period = 1;
 540
 541         return add_event(list, idx, &attr, NULL);
 542 }
 543
 544 static int config_term(struct perf_event_attr *attr,
 545                        struct parse_events_term *term)
 546 {
 547 #define CHECK_TYPE_VAL(type)                                    \
 548 do {                                                            \
 549         if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
 550                 return -EINVAL;                                 \
 551 } while (0)
 552
 553         switch (term->type_term) {
 554         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 555                 CHECK_TYPE_VAL(NUM);
 556                 attr->config = term->val.num;
 557                 break;
 558         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 559                 CHECK_TYPE_VAL(NUM);
 560                 attr->config1 = term->val.num;
 561                 break;
 562         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 563                 CHECK_TYPE_VAL(NUM);
 564                 attr->config2 = term->val.num;
 565                 break;
 566         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 567                 CHECK_TYPE_VAL(NUM);
 568                 attr->sample_period = term->val.num;
 569                 break;
 570         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 571                 /*
 572                  * TODO uncomment when the field is available
 573                  * attr->branch_sample_type = term->val.num;
 574                  */
 575                 break;
 576         case PARSE_EVENTS__TERM_TYPE_NAME:
 577                 CHECK_TYPE_VAL(STR);
 578                 break;
 579         default:
 580                 return -EINVAL;
 581         }
 582
 583         return 0;
 584 #undef CHECK_TYPE_VAL
 585 }
 586
 587 static int config_attr(struct perf_event_attr *attr,
 588                        struct list_head *head, int fail)
 589 {
 590         struct parse_events_term *term;
 591
 592         list_for_each_entry(term, head, list)
 593                 if (config_term(attr, term) && fail)
 594                         return -EINVAL;
 595
 596         return 0;
 597 }
 598
 599 int parse_events_add_numeric(struct list_head *list, int *idx,
 600                              u32 type, u64 config,
 601                              struct list_head *head_config)
 602 {
 603         struct perf_event_attr attr;
 604
 605         memset(&attr, 0, sizeof(attr));
 606         attr.type = type;
 607         attr.config = config;
 608
 609         if (head_config &&
 610             config_attr(&attr, head_config, 1))
 611                 return -EINVAL;
 612
 613         return add_event(list, idx, &attr, NULL);
 614 }
 615
 616 static int parse_events__is_name_term(struct parse_events_term *term)
 617 {
 618         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 619 }
 620
 621 static char *pmu_event_name(struct list_head *head_terms)
 622 {
 623         struct parse_events_term *term;
 624
 625         list_for_each_entry(term, head_terms, list)
 626                 if (parse_events__is_name_term(term))
 627                         return term->val.str;
 628
 629         return NULL;
 630 }
 631
 632 int parse_events_add_pmu(struct list_head *list, int *idx,
 633                          char *name, struct list_head *head_config)
 634 {
 635         struct perf_event_attr attr;
 636         struct perf_pmu *pmu;
 637         struct perf_evsel *evsel;
 638         const char *unit;
 639         double scale;
 640
 641         pmu = perf_pmu__find(name);
 642         if (!pmu)
 643                 return -EINVAL;
 644
 645         memset(&attr, 0, sizeof(attr));
 646
 647         if (perf_pmu__check_alias(pmu, head_config, &unit, &scale))
 648                 return -EINVAL;
 649
 650         /*
 651          * Configure hardcoded terms first, no need to check
 652          * return value when called with fail == 0 ;)
 653          */
 654         config_attr(&attr, head_config, 0);
 655
 656         if (perf_pmu__config(pmu, &attr, head_config))
 657                 return -EINVAL;
 658
 659         evsel = __add_event(list, idx, &attr, pmu_event_name(head_config),
 660                             pmu->cpus);
 661         if (evsel) {
 662                 evsel->unit = unit;
 663                 evsel->scale = scale;
 664         }
 665
 666         return evsel ? 0 : -ENOMEM;
 667 }
 668
 669 int parse_events__modifier_group(struct list_head *list,
 670                                  char *event_mod)
 671 {
 672         return parse_events__modifier_event(list, event_mod, true);
 673 }
 674
 675 void parse_events__set_leader(char *name, struct list_head *list)
 676 {
 677         struct perf_evsel *leader;
 678
 679         __perf_evlist__set_leader(list);
 680         leader = list_entry(list->next, struct perf_evsel, node);
 681         leader->group_name = name ? strdup(name) : NULL;
 682 }
 683
 684 /* list_event is assumed to point to malloc'ed memory */
 685 void parse_events_update_lists(struct list_head *list_event,
 686                                struct list_head *list_all)
 687 {
 688         /*
 689          * Called for single event definition. Update the
 690          * 'all event' list, and reinit the 'single event'
 691          * list, for next event definition.
 692          */
 693         list_splice_tail(list_event, list_all);
 694         free(list_event);
 695 }
 696
 697 struct event_modifier {
 698         int eu;
 699         int ek;
 700         int eh;
 701         int eH;
 702         int eG;
 703         int precise;
 704         int exclude_GH;
 705         int sample_read;
 706         int pinned;
 707 };
 708
 709 static int get_event_modifier(struct event_modifier *mod, char *str,
 710                                struct perf_evsel *evsel)
 711 {
 712         int eu = evsel ? evsel->attr.exclude_user : 0;
 713         int ek = evsel ? evsel->attr.exclude_kernel : 0;
 714         int eh = evsel ? evsel->attr.exclude_hv : 0;
 715         int eH = evsel ? evsel->attr.exclude_host : 0;
 716         int eG = evsel ? evsel->attr.exclude_guest : 0;
 717         int precise = evsel ? evsel->attr.precise_ip : 0;
 718         int sample_read = 0;
 719         int pinned = evsel ? evsel->attr.pinned : 0;
 720
 721         int exclude = eu | ek | eh;
 722         int exclude_GH = evsel ? evsel->exclude_GH : 0;
 723
 724         memset(mod, 0, sizeof(*mod));
 725
 726         while (*str) {
 727                 if (*str == 'u') {
 728                         if (!exclude)
 729                                 exclude = eu = ek = eh = 1;
 730                         eu = 0;
 731                 } else if (*str == 'k') {
 732                         if (!exclude)
 733                                 exclude = eu = ek = eh = 1;
 734                         ek = 0;
 735                 } else if (*str == 'h') {
 736                         if (!exclude)
 737                                 exclude = eu = ek = eh = 1;
 738                         eh = 0;
 739                 } else if (*str == 'G') {
 740                         if (!exclude_GH)
 741                                 exclude_GH = eG = eH = 1;
 742                         eG = 0;
 743                 } else if (*str == 'H') {
 744                         if (!exclude_GH)
 745                                 exclude_GH = eG = eH = 1;
 746                         eH = 0;
 747                 } else if (*str == 'p') {
 748                         precise++;
 749                         /* use of precise requires exclude_guest */
 750                         if (!exclude_GH)
 751                                 eG = 1;
 752                 } else if (*str == 'S') {
 753                         sample_read = 1;
 754                 } else if (*str == 'D') {
 755                         pinned = 1;
 756                 } else
 757                         break;
 758
 759                 ++str;
 760         }
 761
 762         /*
 763          * precise ip:
 764          *
 765          *  0 - SAMPLE_IP can have arbitrary skid
 766          *  1 - SAMPLE_IP must have constant skid
 767          *  2 - SAMPLE_IP requested to have 0 skid
 768          *  3 - SAMPLE_IP must have 0 skid
 769          *
 770          *  See also PERF_RECORD_MISC_EXACT_IP
 771          */
 772         if (precise > 3)
 773                 return -EINVAL;
 774
 775         mod->eu = eu;
 776         mod->ek = ek;
 777         mod->eh = eh;
 778         mod->eH = eH;
 779         mod->eG = eG;
 780         mod->precise = precise;
 781         mod->exclude_GH = exclude_GH;
 782         mod->sample_read = sample_read;
 783         mod->pinned = pinned;
 784
 785         return 0;
 786 }
 787
 788 /*
 789  * Basic modifier sanity check to validate it contains only one
 790  * instance of any modifier (apart from 'p') present.
 791  */
 792 static int check_modifier(char *str)
 793 {
 794         char *p = str;
 795
 796         /* The sizeof includes 0 byte as well. */
 797         if (strlen(str) > (sizeof("ukhGHpppSD") - 1))
 798                 return -1;
 799
 800         while (*p) {
 801                 if (*p != 'p' && strchr(p + 1, *p))
 802                         return -1;
 803                 p++;
 804         }
 805
 806         return 0;
 807 }
 808
 809 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
 810 {
 811         struct perf_evsel *evsel;
 812         struct event_modifier mod;
 813
 814         if (str == NULL)
 815                 return 0;
 816
 817         if (check_modifier(str))
 818                 return -EINVAL;
 819
 820         if (!add && get_event_modifier(&mod, str, NULL))
 821                 return -EINVAL;
 822
 823         __evlist__for_each(list, evsel) {
 824                 if (add && get_event_modifier(&mod, str, evsel))
 825                         return -EINVAL;
 826
 827                 evsel->attr.exclude_user   = mod.eu;
 828                 evsel->attr.exclude_kernel = mod.ek;
 829                 evsel->attr.exclude_hv     = mod.eh;
 830                 evsel->attr.precise_ip     = mod.precise;
 831                 evsel->attr.exclude_host   = mod.eH;
 832                 evsel->attr.exclude_guest  = mod.eG;
 833                 evsel->exclude_GH          = mod.exclude_GH;
 834                 evsel->sample_read         = mod.sample_read;
 835
 836                 if (perf_evsel__is_group_leader(evsel))
 837                         evsel->attr.pinned = mod.pinned;
 838         }
 839
 840         return 0;
 841 }
 842
 843 int parse_events_name(struct list_head *list, char *name)
 844 {
 845         struct perf_evsel *evsel;
 846
 847         __evlist__for_each(list, evsel) {
 848                 if (!evsel->name)
 849                         evsel->name = strdup(name);
 850         }
 851
 852         return 0;
 853 }
 854
 855 static int parse_events__scanner(const char *str, void *data, int start_token);
 856
 857 static int parse_events_fixup(int ret, const char *str, void *data,
 858                               int start_token)
 859 {
 860         char *o = strdup(str);
 861         char *s = NULL;
 862         char *t = o;
 863         char *p;
 864         int len = 0;
 865
 866         if (!o)
 867                 return ret;
 868         while ((p = strsep(&t, ",")) != NULL) {
 869                 if (s)
 870                         str_append(&s, &len, ",");
 871                 str_append(&s, &len, "cpu/");
 872                 str_append(&s, &len, p);
 873                 str_append(&s, &len, "/");
 874         }
 875         free(o);
 876         if (!s)
 877                 return -ENOMEM;
 878         return parse_events__scanner(s, data, start_token);
 879 }
 880
 881 static int parse_events__scanner(const char *str, void *data, int start_token)
 882 {
 883         YY_BUFFER_STATE buffer;
 884         void *scanner;
 885         int ret;
 886
 887         ret = parse_events_lex_init_extra(start_token, &scanner);
 888         if (ret)
 889                 return ret;
 890
 891         buffer = parse_events__scan_string(str, scanner);
 892
 893 #ifdef PARSER_DEBUG
 894         parse_events_debug = 1;
 895 #endif
 896         ret = parse_events_parse(data, scanner);
 897
 898         parse_events__flush_buffer(buffer, scanner);
 899         parse_events__delete_buffer(buffer, scanner);
 900         parse_events_lex_destroy(scanner);
 901         if (ret && !strchr(str, '/'))
 902                 ret = parse_events_fixup(ret, str, data, start_token);
 903         return ret;
 904 }
 905
 906 /*
 907  * parse event config string, return a list of event terms.
 908  */
 909 int parse_events_terms(struct list_head *terms, const char *str)
 910 {
 911         struct parse_events_terms data = {
 912                 .terms = NULL,
 913         };
 914         int ret;
 915
 916         ret = parse_events__scanner(str, &data, PE_START_TERMS);
 917         if (!ret) {
 918                 list_splice(data.terms, terms);
 919                 zfree(&data.terms);
 920                 return 0;
 921         }
 922
 923         if (data.terms)
 924                 parse_events__free_terms(data.terms);
 925         return ret;
 926 }
 927
 928 int parse_events(struct perf_evlist *evlist, const char *str)
 929 {
 930         struct parse_events_evlist data = {
 931                 .list = LIST_HEAD_INIT(data.list),
 932                 .idx  = evlist->nr_entries,
 933         };
 934         int ret;
 935
 936         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 937         if (!ret) {
 938                 int entries = data.idx - evlist->nr_entries;
 939                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
 940                 evlist->nr_groups += data.nr_groups;
 941                 return 0;
 942         }
 943
 944         /*
 945          * There are 2 users - builtin-record and builtin-test objects.
 946          * Both call perf_evlist__delete in case of error, so we dont
 947          * need to bother.
 948          */
 949         return ret;
 950 }
 951
 952 int parse_events_option(const struct option *opt, const char *str,
 953                         int unset __maybe_unused)
 954 {
 955         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 956         int ret = parse_events(evlist, str);
 957
 958         if (ret) {
 959                 fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 960                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 961         }
 962         return ret;
 963 }
 964
 965 int parse_filter(const struct option *opt, const char *str,
 966                  int unset __maybe_unused)
 967 {
 968         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 969         struct perf_evsel *last = NULL;
 970
 971         if (evlist->nr_entries > 0)
 972                 last = perf_evlist__last(evlist);
 973
 974         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 975                 fprintf(stderr,
 976                         "-F option should follow a -e tracepoint option\n");
 977                 return -1;
 978         }
 979
 980         last->filter = strdup(str);
 981         if (last->filter == NULL) {
 982                 fprintf(stderr, "not enough memory to hold filter string\n");
 983                 return -1;
 984         }
 985
 986         return 0;
 987 }
 988
 989 static const char * const event_type_descriptors[] = {
 990         "Hardware event",
 991         "Software event",
 992         "Tracepoint event",
 993         "Hardware cache event",
 994         "Raw hardware event descriptor",
 995         "Hardware breakpoint",
 996 };
 997
 998 /*
 999  * Print the events from <debugfs_mount_point>/tracing/events
1000  */
1001
1002 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1003                              bool name_only)
1004 {
1005         DIR *sys_dir, *evt_dir;
1006         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1007         char evt_path[MAXPATHLEN];
1008         char dir_path[MAXPATHLEN];
1009
1010         if (debugfs_valid_mountpoint(tracing_events_path)) {
1011                 printf("  [ Tracepoints not available: %s ]\n", strerror(errno));
1012                 return;
1013         }
1014
1015         sys_dir = opendir(tracing_events_path);
1016         if (!sys_dir)
1017                 return;
1018
1019         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1020                 if (subsys_glob != NULL &&
1021                     !strglobmatch(sys_dirent.d_name, subsys_glob))
1022                         continue;
1023
1024                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1025                          sys_dirent.d_name);
1026                 evt_dir = opendir(dir_path);
1027                 if (!evt_dir)
1028                         continue;
1029
1030                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1031                         if (event_glob != NULL &&
1032                             !strglobmatch(evt_dirent.d_name, event_glob))
1033                                 continue;
1034
1035                         if (name_only) {
1036                                 printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
1037                                 continue;
1038                         }
1039
1040                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1041                                  sys_dirent.d_name, evt_dirent.d_name);
1042                         printf("  %-50s [%s]\n", evt_path,
1043                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1044                 }
1045                 closedir(evt_dir);
1046         }
1047         closedir(sys_dir);
1048 }
1049
1050 /*
1051  * Check whether event is in <debugfs_mount_point>/tracing/events
1052  */
1053
1054 int is_valid_tracepoint(const char *event_string)
1055 {
1056         DIR *sys_dir, *evt_dir;
1057         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1058         char evt_path[MAXPATHLEN];
1059         char dir_path[MAXPATHLEN];
1060
1061         if (debugfs_valid_mountpoint(tracing_events_path))
1062                 return 0;
1063
1064         sys_dir = opendir(tracing_events_path);
1065         if (!sys_dir)
1066                 return 0;
1067
1068         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1069
1070                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1071                          sys_dirent.d_name);
1072                 evt_dir = opendir(dir_path);
1073                 if (!evt_dir)
1074                         continue;
1075
1076                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1077                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1078                                  sys_dirent.d_name, evt_dirent.d_name);
1079                         if (!strcmp(evt_path, event_string)) {
1080                                 closedir(evt_dir);
1081                                 closedir(sys_dir);
1082                                 return 1;
1083                         }
1084                 }
1085                 closedir(evt_dir);
1086         }
1087         closedir(sys_dir);
1088         return 0;
1089 }
1090
1091 static bool is_event_supported(u8 type, unsigned config)
1092 {
1093         bool ret = true;
1094         int open_return;
1095         struct perf_evsel *evsel;
1096         struct perf_event_attr attr = {
1097                 .type = type,
1098                 .config = config,
1099                 .disabled = 1,
1100         };
1101         struct {
1102                 struct thread_map map;
1103                 int threads[1];
1104         } tmap = {
1105                 .map.nr  = 1,
1106                 .threads = { 0 },
1107         };
1108
1109         evsel = perf_evsel__new(&attr);
1110         if (evsel) {
1111                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1112                 ret = open_return >= 0;
1113
1114                 if (open_return == -EACCES) {
1115                         /*
1116                          * This happens if the paranoid value
1117                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1118                          * Re-run with exclude_kernel set; we don't do that
1119                          * by default as some ARM machines do not support it.
1120                          *
1121                          */
1122                         evsel->attr.exclude_kernel = 1;
1123                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1124                 }
1125                 perf_evsel__delete(evsel);
1126         }
1127
1128         return ret;
1129 }
1130
1131 static void __print_events_type(u8 type, struct event_symbol *syms,
1132                                 unsigned max)
1133 {
1134         char name[64];
1135         unsigned i;
1136
1137         for (i = 0; i < max ; i++, syms++) {
1138                 if (!is_event_supported(type, i))
1139                         continue;
1140
1141                 if (strlen(syms->alias))
1142                         snprintf(name, sizeof(name),  "%s OR %s",
1143                                  syms->symbol, syms->alias);
1144                 else
1145                         snprintf(name, sizeof(name), "%s", syms->symbol);
1146
1147                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
1148         }
1149 }
1150
1151 void print_events_type(u8 type)
1152 {
1153         if (type == PERF_TYPE_SOFTWARE)
1154                 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
1155         else
1156                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
1157 }
1158
1159 int print_hwcache_events(const char *event_glob, bool name_only)
1160 {
1161         unsigned int type, op, i, printed = 0;
1162         char name[64];
1163
1164         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1165                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1166                         /* skip invalid cache type */
1167                         if (!perf_evsel__is_cache_op_valid(type, op))
1168                                 continue;
1169
1170                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1171                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1172                                                                         name, sizeof(name));
1173                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1174                                         continue;
1175
1176                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1177                                                         type | (op << 8) | (i << 16)))
1178                                         continue;
1179
1180                                 if (name_only)
1181                                         printf("%s ", name);
1182                                 else
1183                                         printf("  %-50s [%s]\n", name,
1184                                                event_type_descriptors[PERF_TYPE_HW_CACHE]);
1185                                 ++printed;
1186                         }
1187                 }
1188         }
1189
1190         if (printed)
1191                 printf("\n");
1192         return printed;
1193 }
1194
1195 static void print_symbol_events(const char *event_glob, unsigned type,
1196                                 struct event_symbol *syms, unsigned max,
1197                                 bool name_only)
1198 {
1199         unsigned i, printed = 0;
1200         char name[MAX_NAME_LEN];
1201
1202         for (i = 0; i < max; i++, syms++) {
1203
1204                 if (event_glob != NULL &&
1205                     !(strglobmatch(syms->symbol, event_glob) ||
1206                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1207                         continue;
1208
1209                 if (!is_event_supported(type, i))
1210                         continue;
1211
1212                 if (name_only) {
1213                         printf("%s ", syms->symbol);
1214                         continue;
1215                 }
1216
1217                 if (strlen(syms->alias))
1218                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1219                 else
1220                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1221
1222                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
1223
1224                 printed++;
1225         }
1226
1227         if (printed)
1228                 printf("\n");
1229 }
1230
1231 /*
1232  * Print the help text for the event symbols:
1233  */
1234 void print_events(const char *event_glob, bool name_only)
1235 {
1236         if (!name_only) {
1237                 printf("\n");
1238                 printf("List of pre-defined events (to be used in -e):\n");
1239         }
1240
1241         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1242                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1243
1244         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1245                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1246
1247         print_hwcache_events(event_glob, name_only);
1248
1249         print_pmu_events(event_glob, name_only);
1250
1251         if (event_glob != NULL)
1252                 return;
1253
1254         if (!name_only) {
1255                 printf("  %-50s [%s]\n",
1256                        "rNNN",
1257                        event_type_descriptors[PERF_TYPE_RAW]);
1258                 printf("  %-50s [%s]\n",
1259                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1260                        event_type_descriptors[PERF_TYPE_RAW]);
1261                 printf("   (see 'man perf-list' on how to encode it)\n");
1262                 printf("\n");
1263
1264                 printf("  %-50s [%s]\n",
1265                        "mem:<addr>[:access]",
1266                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1267                 printf("\n");
1268         }
1269
1270         print_tracepoint_events(NULL, NULL, name_only);
1271 }
1272
1273 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1274 {
1275         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1276 }
1277
1278 static int new_term(struct parse_events_term **_term, int type_val,
1279                     int type_term, char *config,
1280                     char *str, u64 num)
1281 {
1282         struct parse_events_term *term;
1283
1284         term = zalloc(sizeof(*term));
1285         if (!term)
1286                 return -ENOMEM;
1287
1288         INIT_LIST_HEAD(&term->list);
1289         term->type_val  = type_val;
1290         term->type_term = type_term;
1291         term->config = config;
1292
1293         switch (type_val) {
1294         case PARSE_EVENTS__TERM_TYPE_NUM:
1295                 term->val.num = num;
1296                 break;
1297         case PARSE_EVENTS__TERM_TYPE_STR:
1298                 term->val.str = str;
1299                 break;
1300         default:
1301                 free(term);
1302                 return -EINVAL;
1303         }
1304
1305         *_term = term;
1306         return 0;
1307 }
1308
1309 int parse_events_term__num(struct parse_events_term **term,
1310                            int type_term, char *config, u64 num)
1311 {
1312         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1313                         config, NULL, num);
1314 }
1315
1316 int parse_events_term__str(struct parse_events_term **term,
1317                            int type_term, char *config, char *str)
1318 {
1319         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1320                         config, str, 0);
1321 }
1322
1323 int parse_events_term__sym_hw(struct parse_events_term **term,
1324                               char *config, unsigned idx)
1325 {
1326         struct event_symbol *sym;
1327
1328         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1329         sym = &event_symbols_hw[idx];
1330
1331         if (config)
1332                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1333                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1334                                 (char *) sym->symbol, 0);
1335         else
1336                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1337                                 PARSE_EVENTS__TERM_TYPE_USER,
1338                                 (char *) "event", (char *) sym->symbol, 0);
1339 }
1340
1341 int parse_events_term__clone(struct parse_events_term **new,
1342                              struct parse_events_term *term)
1343 {
1344         return new_term(new, term->type_val, term->type_term, term->config,
1345                         term->val.str, term->val.num);
1346 }
1347
1348 void parse_events__free_terms(struct list_head *terms)
1349 {
1350         struct parse_events_term *term, *h;
1351
1352         list_for_each_entry_safe(term, h, terms, list)
1353                 free(term);
1354 }