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