tools/perf/util/parse-events.c

   1 #include <linux/hw_breakpoint.h>
   2 #include "util.h"
   3 #include "../perf.h"
   4 #include "evlist.h"
   5 #include "evsel.h"
   6 #include "parse-options.h"
   7 #include "parse-events.h"
   8 #include "exec_cmd.h"
   9 #include "string.h"
  10 #include "symbol.h"
  11 #include "cache.h"
  12 #include "header.h"
  13 #include "debugfs.h"
  14 #include "parse-events-bison.h"
  15 #define YY_EXTRA_TYPE int
  16 #include "parse-events-flex.h"
  17 #include "pmu.h"
  18
  19 #define MAX_NAME_LEN 100
  20
  21 struct event_symbol {
  22         const char      *symbol;
  23         const char      *alias;
  24 };
  25
  26 #ifdef PARSER_DEBUG
  27 extern int parse_events_debug;
  28 #endif
  29 int parse_events_parse(void *data, void *scanner);
  30
  31 static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  32         [PERF_COUNT_HW_CPU_CYCLES] = {
  33                 .symbol = "cpu-cycles",
  34                 .alias  = "cycles",
  35         },
  36         [PERF_COUNT_HW_INSTRUCTIONS] = {
  37                 .symbol = "instructions",
  38                 .alias  = "",
  39         },
  40         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  41                 .symbol = "cache-references",
  42                 .alias  = "",
  43         },
  44         [PERF_COUNT_HW_CACHE_MISSES] = {
  45                 .symbol = "cache-misses",
  46                 .alias  = "",
  47         },
  48         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  49                 .symbol = "branch-instructions",
  50                 .alias  = "branches",
  51         },
  52         [PERF_COUNT_HW_BRANCH_MISSES] = {
  53                 .symbol = "branch-misses",
  54                 .alias  = "",
  55         },
  56         [PERF_COUNT_HW_BUS_CYCLES] = {
  57                 .symbol = "bus-cycles",
  58                 .alias  = "",
  59         },
  60         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  61                 .symbol = "stalled-cycles-frontend",
  62                 .alias  = "idle-cycles-frontend",
  63         },
  64         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  65                 .symbol = "stalled-cycles-backend",
  66                 .alias  = "idle-cycles-backend",
  67         },
  68         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  69                 .symbol = "ref-cycles",
  70                 .alias  = "",
  71         },
  72 };
  73
  74 static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  75         [PERF_COUNT_SW_CPU_CLOCK] = {
  76                 .symbol = "cpu-clock",
  77                 .alias  = "",
  78         },
  79         [PERF_COUNT_SW_TASK_CLOCK] = {
  80                 .symbol = "task-clock",
  81                 .alias  = "",
  82         },
  83         [PERF_COUNT_SW_PAGE_FAULTS] = {
  84                 .symbol = "page-faults",
  85                 .alias  = "faults",
  86         },
  87         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  88                 .symbol = "context-switches",
  89                 .alias  = "cs",
  90         },
  91         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
  92                 .symbol = "cpu-migrations",
  93                 .alias  = "migrations",
  94         },
  95         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
  96                 .symbol = "minor-faults",
  97                 .alias  = "",
  98         },
  99         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 100                 .symbol = "major-faults",
 101                 .alias  = "",
 102         },
 103         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 104                 .symbol = "alignment-faults",
 105                 .alias  = "",
 106         },
 107         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 108                 .symbol = "emulation-faults",
 109                 .alias  = "",
 110         },
 111 };
 112
 113 #define __PERF_EVENT_FIELD(config, name) \
 114         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 115
 116 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 117 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 118 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 119 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 120
 121 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 122         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 123         if (sys_dirent.d_type == DT_DIR &&                                     \
 124            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 125            (strcmp(sys_dirent.d_name, "..")))
 126
 127 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 128 {
 129         char evt_path[MAXPATHLEN];
 130         int fd;
 131
 132         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 133                         sys_dir->d_name, evt_dir->d_name);
 134         fd = open(evt_path, O_RDONLY);
 135         if (fd < 0)
 136                 return -EINVAL;
 137         close(fd);
 138
 139         return 0;
 140 }
 141
 142 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 143         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 144         if (evt_dirent.d_type == DT_DIR &&                                     \
 145            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 146            (strcmp(evt_dirent.d_name, "..")) &&                                \
 147            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 148
 149 #define MAX_EVENT_LENGTH 512
 150
 151
 152 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 153 {
 154         struct tracepoint_path *path = NULL;
 155         DIR *sys_dir, *evt_dir;
 156         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 157         char id_buf[24];
 158         int fd;
 159         u64 id;
 160         char evt_path[MAXPATHLEN];
 161         char dir_path[MAXPATHLEN];
 162
 163         if (debugfs_valid_mountpoint(tracing_events_path))
 164                 return NULL;
 165
 166         sys_dir = opendir(tracing_events_path);
 167         if (!sys_dir)
 168                 return NULL;
 169
 170         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 171
 172                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 173                          sys_dirent.d_name);
 174                 evt_dir = opendir(dir_path);
 175                 if (!evt_dir)
 176                         continue;
 177
 178                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 179
 180                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 181                                  evt_dirent.d_name);
 182                         fd = open(evt_path, O_RDONLY);
 183                         if (fd < 0)
 184                                 continue;
 185                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 186                                 close(fd);
 187                                 continue;
 188                         }
 189                         close(fd);
 190                         id = atoll(id_buf);
 191                         if (id == config) {
 192                                 closedir(evt_dir);
 193                                 closedir(sys_dir);
 194                                 path = zalloc(sizeof(*path));
 195                                 path->system = malloc(MAX_EVENT_LENGTH);
 196                                 if (!path->system) {
 197                                         free(path);
 198                                         return NULL;
 199                                 }
 200                                 path->name = malloc(MAX_EVENT_LENGTH);
 201                                 if (!path->name) {
 202                                         free(path->system);
 203                                         free(path);
 204                                         return NULL;
 205                                 }
 206                                 strncpy(path->system, sys_dirent.d_name,
 207                                         MAX_EVENT_LENGTH);
 208                                 strncpy(path->name, evt_dirent.d_name,
 209                                         MAX_EVENT_LENGTH);
 210                                 return path;
 211                         }
 212                 }
 213                 closedir(evt_dir);
 214         }
 215
 216         closedir(sys_dir);
 217         return NULL;
 218 }
 219
 220 const char *event_type(int type)
 221 {
 222         switch (type) {
 223         case PERF_TYPE_HARDWARE:
 224                 return "hardware";
 225
 226         case PERF_TYPE_SOFTWARE:
 227                 return "software";
 228
 229         case PERF_TYPE_TRACEPOINT:
 230                 return "tracepoint";
 231
 232         case PERF_TYPE_HW_CACHE:
 233                 return "hardware-cache";
 234
 235         default:
 236                 break;
 237         }
 238
 239         return "unknown";
 240 }
 241
 242
 243
 244 static int __add_event(struct list_head **_list, int *idx,
 245                        struct perf_event_attr *attr,
 246                        char *name, struct cpu_map *cpus)
 247 {
 248         struct perf_evsel *evsel;
 249         struct list_head *list = *_list;
 250
 251         if (!list) {
 252                 list = malloc(sizeof(*list));
 253                 if (!list)
 254                         return -ENOMEM;
 255                 INIT_LIST_HEAD(list);
 256         }
 257
 258         event_attr_init(attr);
 259
 260         evsel = perf_evsel__new(attr, (*idx)++);
 261         if (!evsel) {
 262                 free(list);
 263                 return -ENOMEM;
 264         }
 265
 266         evsel->cpus = cpus;
 267         if (name)
 268                 evsel->name = strdup(name);
 269         list_add_tail(&evsel->node, list);
 270         *_list = list;
 271         return 0;
 272 }
 273
 274 static int add_event(struct list_head **_list, int *idx,
 275                      struct perf_event_attr *attr, char *name)
 276 {
 277         return __add_event(_list, idx, attr, name, NULL);
 278 }
 279
 280 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 281 {
 282         int i, j;
 283         int n, longest = -1;
 284
 285         for (i = 0; i < size; i++) {
 286                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 287                         n = strlen(names[i][j]);
 288                         if (n > longest && !strncasecmp(str, names[i][j], n))
 289                                 longest = n;
 290                 }
 291                 if (longest > 0)
 292                         return i;
 293         }
 294
 295         return -1;
 296 }
 297
 298 int parse_events_add_cache(struct list_head **list, int *idx,
 299                            char *type, char *op_result1, char *op_result2)
 300 {
 301         struct perf_event_attr attr;
 302         char name[MAX_NAME_LEN];
 303         int cache_type = -1, cache_op = -1, cache_result = -1;
 304         char *op_result[2] = { op_result1, op_result2 };
 305         int i, n;
 306
 307         /*
 308          * No fallback - if we cannot get a clear cache type
 309          * then bail out:
 310          */
 311         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 312                                    PERF_COUNT_HW_CACHE_MAX);
 313         if (cache_type == -1)
 314                 return -EINVAL;
 315
 316         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 317
 318         for (i = 0; (i < 2) && (op_result[i]); i++) {
 319                 char *str = op_result[i];
 320
 321                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 322
 323                 if (cache_op == -1) {
 324                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 325                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 326                         if (cache_op >= 0) {
 327                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 328                                         return -EINVAL;
 329                                 continue;
 330                         }
 331                 }
 332
 333                 if (cache_result == -1) {
 334                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 335                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 336                         if (cache_result >= 0)
 337                                 continue;
 338                 }
 339         }
 340
 341         /*
 342          * Fall back to reads:
 343          */
 344         if (cache_op == -1)
 345                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 346
 347         /*
 348          * Fall back to accesses:
 349          */
 350         if (cache_result == -1)
 351                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 352
 353         memset(&attr, 0, sizeof(attr));
 354         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 355         attr.type = PERF_TYPE_HW_CACHE;
 356         return add_event(list, idx, &attr, name);
 357 }
 358
 359 static int add_tracepoint(struct list_head **listp, int *idx,
 360                           char *sys_name, char *evt_name)
 361 {
 362         struct perf_evsel *evsel;
 363         struct list_head *list = *listp;
 364
 365         if (!list) {
 366                 list = malloc(sizeof(*list));
 367                 if (!list)
 368                         return -ENOMEM;
 369                 INIT_LIST_HEAD(list);
 370         }
 371
 372         evsel = perf_evsel__newtp(sys_name, evt_name, (*idx)++);
 373         if (!evsel) {
 374                 free(list);
 375                 return -ENOMEM;
 376         }
 377
 378         list_add_tail(&evsel->node, list);
 379         *listp = list;
 380         return 0;
 381 }
 382
 383 static int add_tracepoint_multi(struct list_head **list, int *idx,
 384                                 char *sys_name, char *evt_name)
 385 {
 386         char evt_path[MAXPATHLEN];
 387         struct dirent *evt_ent;
 388         DIR *evt_dir;
 389         int ret = 0;
 390
 391         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 392         evt_dir = opendir(evt_path);
 393         if (!evt_dir) {
 394                 perror("Can't open event dir");
 395                 return -1;
 396         }
 397
 398         while (!ret && (evt_ent = readdir(evt_dir))) {
 399                 if (!strcmp(evt_ent->d_name, ".")
 400                     || !strcmp(evt_ent->d_name, "..")
 401                     || !strcmp(evt_ent->d_name, "enable")
 402                     || !strcmp(evt_ent->d_name, "filter"))
 403                         continue;
 404
 405                 if (!strglobmatch(evt_ent->d_name, evt_name))
 406                         continue;
 407
 408                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 409         }
 410
 411         return ret;
 412 }
 413
 414 int parse_events_add_tracepoint(struct list_head **list, int *idx,
 415                                 char *sys, char *event)
 416 {
 417         int ret;
 418
 419         ret = debugfs_valid_mountpoint(tracing_events_path);
 420         if (ret)
 421                 return ret;
 422
 423         return strpbrk(event, "*?") ?
 424                add_tracepoint_multi(list, idx, sys, event) :
 425                add_tracepoint(list, idx, sys, event);
 426 }
 427
 428 static int
 429 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 430 {
 431         int i;
 432
 433         for (i = 0; i < 3; i++) {
 434                 if (!type || !type[i])
 435                         break;
 436
 437 #define CHECK_SET_TYPE(bit)             \
 438 do {                                    \
 439         if (attr->bp_type & bit)        \
 440                 return -EINVAL;         \
 441         else                            \
 442                 attr->bp_type |= bit;   \
 443 } while (0)
 444
 445                 switch (type[i]) {
 446                 case 'r':
 447                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 448                         break;
 449                 case 'w':
 450                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 451                         break;
 452                 case 'x':
 453                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 454                         break;
 455                 default:
 456                         return -EINVAL;
 457                 }
 458         }
 459
 460 #undef CHECK_SET_TYPE
 461
 462         if (!attr->bp_type) /* Default */
 463                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 464
 465         return 0;
 466 }
 467
 468 int parse_events_add_breakpoint(struct list_head **list, int *idx,
 469                                 void *ptr, char *type)
 470 {
 471         struct perf_event_attr attr;
 472
 473         memset(&attr, 0, sizeof(attr));
 474         attr.bp_addr = (unsigned long) ptr;
 475
 476         if (parse_breakpoint_type(type, &attr))
 477                 return -EINVAL;
 478
 479         /*
 480          * We should find a nice way to override the access length
 481          * Provide some defaults for now
 482          */
 483         if (attr.bp_type == HW_BREAKPOINT_X)
 484                 attr.bp_len = sizeof(long);
 485         else
 486                 attr.bp_len = HW_BREAKPOINT_LEN_4;
 487
 488         attr.type = PERF_TYPE_BREAKPOINT;
 489         attr.sample_period = 1;
 490
 491         return add_event(list, idx, &attr, NULL);
 492 }
 493
 494 static int config_term(struct perf_event_attr *attr,
 495                        struct parse_events__term *term)
 496 {
 497 #define CHECK_TYPE_VAL(type)                                    \
 498 do {                                                            \
 499         if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
 500                 return -EINVAL;                                 \
 501 } while (0)
 502
 503         switch (term->type_term) {
 504         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 505                 CHECK_TYPE_VAL(NUM);
 506                 attr->config = term->val.num;
 507                 break;
 508         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 509                 CHECK_TYPE_VAL(NUM);
 510                 attr->config1 = term->val.num;
 511                 break;
 512         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 513                 CHECK_TYPE_VAL(NUM);
 514                 attr->config2 = term->val.num;
 515                 break;
 516         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 517                 CHECK_TYPE_VAL(NUM);
 518                 attr->sample_period = term->val.num;
 519                 break;
 520         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 521                 /*
 522                  * TODO uncomment when the field is available
 523                  * attr->branch_sample_type = term->val.num;
 524                  */
 525                 break;
 526         case PARSE_EVENTS__TERM_TYPE_NAME:
 527                 CHECK_TYPE_VAL(STR);
 528                 break;
 529         default:
 530                 return -EINVAL;
 531         }
 532
 533         return 0;
 534 #undef CHECK_TYPE_VAL
 535 }
 536
 537 static int config_attr(struct perf_event_attr *attr,
 538                        struct list_head *head, int fail)
 539 {
 540         struct parse_events__term *term;
 541
 542         list_for_each_entry(term, head, list)
 543                 if (config_term(attr, term) && fail)
 544                         return -EINVAL;
 545
 546         return 0;
 547 }
 548
 549 int parse_events_add_numeric(struct list_head **list, int *idx,
 550                              u32 type, u64 config,
 551                              struct list_head *head_config)
 552 {
 553         struct perf_event_attr attr;
 554
 555         memset(&attr, 0, sizeof(attr));
 556         attr.type = type;
 557         attr.config = config;
 558
 559         if (head_config &&
 560             config_attr(&attr, head_config, 1))
 561                 return -EINVAL;
 562
 563         return add_event(list, idx, &attr, NULL);
 564 }
 565
 566 static int parse_events__is_name_term(struct parse_events__term *term)
 567 {
 568         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 569 }
 570
 571 static char *pmu_event_name(struct list_head *head_terms)
 572 {
 573         struct parse_events__term *term;
 574
 575         list_for_each_entry(term, head_terms, list)
 576                 if (parse_events__is_name_term(term))
 577                         return term->val.str;
 578
 579         return NULL;
 580 }
 581
 582 int parse_events_add_pmu(struct list_head **list, int *idx,
 583                          char *name, struct list_head *head_config)
 584 {
 585         struct perf_event_attr attr;
 586         struct perf_pmu *pmu;
 587
 588         pmu = perf_pmu__find(name);
 589         if (!pmu)
 590                 return -EINVAL;
 591
 592         memset(&attr, 0, sizeof(attr));
 593
 594         if (perf_pmu__check_alias(pmu, head_config))
 595                 return -EINVAL;
 596
 597         /*
 598          * Configure hardcoded terms first, no need to check
 599          * return value when called with fail == 0 ;)
 600          */
 601         config_attr(&attr, head_config, 0);
 602
 603         if (perf_pmu__config(pmu, &attr, head_config))
 604                 return -EINVAL;
 605
 606         return __add_event(list, idx, &attr, pmu_event_name(head_config),
 607                            pmu->cpus);
 608 }
 609
 610 int parse_events__modifier_group(struct list_head *list,
 611                                  char *event_mod)
 612 {
 613         return parse_events__modifier_event(list, event_mod, true);
 614 }
 615
 616 void parse_events__set_leader(char *name, struct list_head *list)
 617 {
 618         struct perf_evsel *leader;
 619
 620         __perf_evlist__set_leader(list);
 621         leader = list_entry(list->next, struct perf_evsel, node);
 622         leader->group_name = name ? strdup(name) : NULL;
 623 }
 624
 625 void parse_events_update_lists(struct list_head *list_event,
 626                                struct list_head *list_all)
 627 {
 628         /*
 629          * Called for single event definition. Update the
 630          * 'all event' list, and reinit the 'single event'
 631          * list, for next event definition.
 632          */
 633         list_splice_tail(list_event, list_all);
 634         free(list_event);
 635 }
 636
 637 struct event_modifier {
 638         int eu;
 639         int ek;
 640         int eh;
 641         int eH;
 642         int eG;
 643         int precise;
 644         int exclude_GH;
 645 };
 646
 647 static int get_event_modifier(struct event_modifier *mod, char *str,
 648                                struct perf_evsel *evsel)
 649 {
 650         int eu = evsel ? evsel->attr.exclude_user : 0;
 651         int ek = evsel ? evsel->attr.exclude_kernel : 0;
 652         int eh = evsel ? evsel->attr.exclude_hv : 0;
 653         int eH = evsel ? evsel->attr.exclude_host : 0;
 654         int eG = evsel ? evsel->attr.exclude_guest : 0;
 655         int precise = evsel ? evsel->attr.precise_ip : 0;
 656
 657         int exclude = eu | ek | eh;
 658         int exclude_GH = evsel ? evsel->exclude_GH : 0;
 659
 660         /*
 661          * We are here for group and 'GH' was not set as event
 662          * modifier and whatever event/group modifier override
 663          * default 'GH' setup.
 664          */
 665         if (evsel && !exclude_GH)
 666                 eH = eG = 0;
 667
 668         memset(mod, 0, sizeof(*mod));
 669
 670         while (*str) {
 671                 if (*str == 'u') {
 672                         if (!exclude)
 673                                 exclude = eu = ek = eh = 1;
 674                         eu = 0;
 675                 } else if (*str == 'k') {
 676                         if (!exclude)
 677                                 exclude = eu = ek = eh = 1;
 678                         ek = 0;
 679                 } else if (*str == 'h') {
 680                         if (!exclude)
 681                                 exclude = eu = ek = eh = 1;
 682                         eh = 0;
 683                 } else if (*str == 'G') {
 684                         if (!exclude_GH)
 685                                 exclude_GH = eG = eH = 1;
 686                         eG = 0;
 687                 } else if (*str == 'H') {
 688                         if (!exclude_GH)
 689                                 exclude_GH = eG = eH = 1;
 690                         eH = 0;
 691                 } else if (*str == 'p') {
 692                         precise++;
 693                         /* use of precise requires exclude_guest */
 694                         if (!exclude_GH)
 695                                 eG = 1;
 696                 } else
 697                         break;
 698
 699                 ++str;
 700         }
 701
 702         /*
 703          * precise ip:
 704          *
 705          *  0 - SAMPLE_IP can have arbitrary skid
 706          *  1 - SAMPLE_IP must have constant skid
 707          *  2 - SAMPLE_IP requested to have 0 skid
 708          *  3 - SAMPLE_IP must have 0 skid
 709          *
 710          *  See also PERF_RECORD_MISC_EXACT_IP
 711          */
 712         if (precise > 3)
 713                 return -EINVAL;
 714
 715         mod->eu = eu;
 716         mod->ek = ek;
 717         mod->eh = eh;
 718         mod->eH = eH;
 719         mod->eG = eG;
 720         mod->precise = precise;
 721         mod->exclude_GH = exclude_GH;
 722         return 0;
 723 }
 724
 725 /*
 726  * Basic modifier sanity check to validate it contains only one
 727  * instance of any modifier (apart from 'p') present.
 728  */
 729 static int check_modifier(char *str)
 730 {
 731         char *p = str;
 732
 733         /* The sizeof includes 0 byte as well. */
 734         if (strlen(str) > (sizeof("ukhGHppp") - 1))
 735                 return -1;
 736
 737         while (*p) {
 738                 if (*p != 'p' && strchr(p + 1, *p))
 739                         return -1;
 740                 p++;
 741         }
 742
 743         return 0;
 744 }
 745
 746 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
 747 {
 748         struct perf_evsel *evsel;
 749         struct event_modifier mod;
 750
 751         if (str == NULL)
 752                 return 0;
 753
 754         if (check_modifier(str))
 755                 return -EINVAL;
 756
 757         if (!add && get_event_modifier(&mod, str, NULL))
 758                 return -EINVAL;
 759
 760         list_for_each_entry(evsel, list, node) {
 761
 762                 if (add && get_event_modifier(&mod, str, evsel))
 763                         return -EINVAL;
 764
 765                 evsel->attr.exclude_user   = mod.eu;
 766                 evsel->attr.exclude_kernel = mod.ek;
 767                 evsel->attr.exclude_hv     = mod.eh;
 768                 evsel->attr.precise_ip     = mod.precise;
 769                 evsel->attr.exclude_host   = mod.eH;
 770                 evsel->attr.exclude_guest  = mod.eG;
 771                 evsel->exclude_GH          = mod.exclude_GH;
 772         }
 773
 774         return 0;
 775 }
 776
 777 int parse_events_name(struct list_head *list, char *name)
 778 {
 779         struct perf_evsel *evsel;
 780
 781         list_for_each_entry(evsel, list, node) {
 782                 if (!evsel->name)
 783                         evsel->name = strdup(name);
 784         }
 785
 786         return 0;
 787 }
 788
 789 static int parse_events__scanner(const char *str, void *data, int start_token)
 790 {
 791         YY_BUFFER_STATE buffer;
 792         void *scanner;
 793         int ret;
 794
 795         ret = parse_events_lex_init_extra(start_token, &scanner);
 796         if (ret)
 797                 return ret;
 798
 799         buffer = parse_events__scan_string(str, scanner);
 800
 801 #ifdef PARSER_DEBUG
 802         parse_events_debug = 1;
 803 #endif
 804         ret = parse_events_parse(data, scanner);
 805
 806         parse_events__flush_buffer(buffer, scanner);
 807         parse_events__delete_buffer(buffer, scanner);
 808         parse_events_lex_destroy(scanner);
 809         return ret;
 810 }
 811
 812 /*
 813  * parse event config string, return a list of event terms.
 814  */
 815 int parse_events_terms(struct list_head *terms, const char *str)
 816 {
 817         struct parse_events_data__terms data = {
 818                 .terms = NULL,
 819         };
 820         int ret;
 821
 822         ret = parse_events__scanner(str, &data, PE_START_TERMS);
 823         if (!ret) {
 824                 list_splice(data.terms, terms);
 825                 free(data.terms);
 826                 return 0;
 827         }
 828
 829         parse_events__free_terms(data.terms);
 830         return ret;
 831 }
 832
 833 int parse_events(struct perf_evlist *evlist, const char *str,
 834                  int unset __maybe_unused)
 835 {
 836         struct parse_events_data__events data = {
 837                 .list = LIST_HEAD_INIT(data.list),
 838                 .idx  = evlist->nr_entries,
 839         };
 840         int ret;
 841
 842         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 843         if (!ret) {
 844                 int entries = data.idx - evlist->nr_entries;
 845                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
 846                 return 0;
 847         }
 848
 849         /*
 850          * There are 2 users - builtin-record and builtin-test objects.
 851          * Both call perf_evlist__delete in case of error, so we dont
 852          * need to bother.
 853          */
 854         return ret;
 855 }
 856
 857 int parse_events_option(const struct option *opt, const char *str,
 858                         int unset __maybe_unused)
 859 {
 860         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 861         int ret = parse_events(evlist, str, unset);
 862
 863         if (ret) {
 864                 fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 865                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 866         }
 867         return ret;
 868 }
 869
 870 int parse_filter(const struct option *opt, const char *str,
 871                  int unset __maybe_unused)
 872 {
 873         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 874         struct perf_evsel *last = NULL;
 875
 876         if (evlist->nr_entries > 0)
 877                 last = perf_evlist__last(evlist);
 878
 879         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 880                 fprintf(stderr,
 881                         "-F option should follow a -e tracepoint option\n");
 882                 return -1;
 883         }
 884
 885         last->filter = strdup(str);
 886         if (last->filter == NULL) {
 887                 fprintf(stderr, "not enough memory to hold filter string\n");
 888                 return -1;
 889         }
 890
 891         return 0;
 892 }
 893
 894 static const char * const event_type_descriptors[] = {
 895         "Hardware event",
 896         "Software event",
 897         "Tracepoint event",
 898         "Hardware cache event",
 899         "Raw hardware event descriptor",
 900         "Hardware breakpoint",
 901 };
 902
 903 /*
 904  * Print the events from <debugfs_mount_point>/tracing/events
 905  */
 906
 907 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
 908                              bool name_only)
 909 {
 910         DIR *sys_dir, *evt_dir;
 911         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 912         char evt_path[MAXPATHLEN];
 913         char dir_path[MAXPATHLEN];
 914
 915         if (debugfs_valid_mountpoint(tracing_events_path))
 916                 return;
 917
 918         sys_dir = opendir(tracing_events_path);
 919         if (!sys_dir)
 920                 return;
 921
 922         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 923                 if (subsys_glob != NULL &&
 924                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 925                         continue;
 926
 927                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 928                          sys_dirent.d_name);
 929                 evt_dir = opendir(dir_path);
 930                 if (!evt_dir)
 931                         continue;
 932
 933                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 934                         if (event_glob != NULL &&
 935                             !strglobmatch(evt_dirent.d_name, event_glob))
 936                                 continue;
 937
 938                         if (name_only) {
 939                                 printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
 940                                 continue;
 941                         }
 942
 943                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 944                                  sys_dirent.d_name, evt_dirent.d_name);
 945                         printf("  %-50s [%s]\n", evt_path,
 946                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 947                 }
 948                 closedir(evt_dir);
 949         }
 950         closedir(sys_dir);
 951 }
 952
 953 /*
 954  * Check whether event is in <debugfs_mount_point>/tracing/events
 955  */
 956
 957 int is_valid_tracepoint(const char *event_string)
 958 {
 959         DIR *sys_dir, *evt_dir;
 960         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 961         char evt_path[MAXPATHLEN];
 962         char dir_path[MAXPATHLEN];
 963
 964         if (debugfs_valid_mountpoint(tracing_events_path))
 965                 return 0;
 966
 967         sys_dir = opendir(tracing_events_path);
 968         if (!sys_dir)
 969                 return 0;
 970
 971         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 972
 973                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 974                          sys_dirent.d_name);
 975                 evt_dir = opendir(dir_path);
 976                 if (!evt_dir)
 977                         continue;
 978
 979                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 980                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 981                                  sys_dirent.d_name, evt_dirent.d_name);
 982                         if (!strcmp(evt_path, event_string)) {
 983                                 closedir(evt_dir);
 984                                 closedir(sys_dir);
 985                                 return 1;
 986                         }
 987                 }
 988                 closedir(evt_dir);
 989         }
 990         closedir(sys_dir);
 991         return 0;
 992 }
 993
 994 static void __print_events_type(u8 type, struct event_symbol *syms,
 995                                 unsigned max)
 996 {
 997         char name[64];
 998         unsigned i;
 999
1000         for (i = 0; i < max ; i++, syms++) {
1001                 if (strlen(syms->alias))
1002                         snprintf(name, sizeof(name),  "%s OR %s",
1003                                  syms->symbol, syms->alias);
1004                 else
1005                         snprintf(name, sizeof(name), "%s", syms->symbol);
1006
1007                 printf("  %-50s [%s]\n", name,
1008                         event_type_descriptors[type]);
1009         }
1010 }
1011
1012 void print_events_type(u8 type)
1013 {
1014         if (type == PERF_TYPE_SOFTWARE)
1015                 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
1016         else
1017                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
1018 }
1019
1020 int print_hwcache_events(const char *event_glob, bool name_only)
1021 {
1022         unsigned int type, op, i, printed = 0;
1023         char name[64];
1024
1025         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1026                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1027                         /* skip invalid cache type */
1028                         if (!perf_evsel__is_cache_op_valid(type, op))
1029                                 continue;
1030
1031                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1032                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1033                                                                         name, sizeof(name));
1034                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1035                                         continue;
1036
1037                                 if (name_only)
1038                                         printf("%s ", name);
1039                                 else
1040                                         printf("  %-50s [%s]\n", name,
1041                                                event_type_descriptors[PERF_TYPE_HW_CACHE]);
1042                                 ++printed;
1043                         }
1044                 }
1045         }
1046
1047         return printed;
1048 }
1049
1050 static void print_symbol_events(const char *event_glob, unsigned type,
1051                                 struct event_symbol *syms, unsigned max,
1052                                 bool name_only)
1053 {
1054         unsigned i, printed = 0;
1055         char name[MAX_NAME_LEN];
1056
1057         for (i = 0; i < max; i++, syms++) {
1058
1059                 if (event_glob != NULL &&
1060                     !(strglobmatch(syms->symbol, event_glob) ||
1061                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1062                         continue;
1063
1064                 if (name_only) {
1065                         printf("%s ", syms->symbol);
1066                         continue;
1067                 }
1068
1069                 if (strlen(syms->alias))
1070                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1071                 else
1072                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1073
1074                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
1075
1076                 printed++;
1077         }
1078
1079         if (printed)
1080                 printf("\n");
1081 }
1082
1083 /*
1084  * Print the help text for the event symbols:
1085  */
1086 void print_events(const char *event_glob, bool name_only)
1087 {
1088         if (!name_only) {
1089                 printf("\n");
1090                 printf("List of pre-defined events (to be used in -e):\n");
1091         }
1092
1093         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1094                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1095
1096         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1097                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1098
1099         print_hwcache_events(event_glob, name_only);
1100
1101         if (event_glob != NULL)
1102                 return;
1103
1104         if (!name_only) {
1105                 printf("\n");
1106                 printf("  %-50s [%s]\n",
1107                        "rNNN",
1108                        event_type_descriptors[PERF_TYPE_RAW]);
1109                 printf("  %-50s [%s]\n",
1110                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1111                        event_type_descriptors[PERF_TYPE_RAW]);
1112                 printf("   (see 'man perf-list' on how to encode it)\n");
1113                 printf("\n");
1114
1115                 printf("  %-50s [%s]\n",
1116                        "mem:<addr>[:access]",
1117                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1118                 printf("\n");
1119         }
1120
1121         print_tracepoint_events(NULL, NULL, name_only);
1122 }
1123
1124 int parse_events__is_hardcoded_term(struct parse_events__term *term)
1125 {
1126         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1127 }
1128
1129 static int new_term(struct parse_events__term **_term, int type_val,
1130                     int type_term, char *config,
1131                     char *str, u64 num)
1132 {
1133         struct parse_events__term *term;
1134
1135         term = zalloc(sizeof(*term));
1136         if (!term)
1137                 return -ENOMEM;
1138
1139         INIT_LIST_HEAD(&term->list);
1140         term->type_val  = type_val;
1141         term->type_term = type_term;
1142         term->config = config;
1143
1144         switch (type_val) {
1145         case PARSE_EVENTS__TERM_TYPE_NUM:
1146                 term->val.num = num;
1147                 break;
1148         case PARSE_EVENTS__TERM_TYPE_STR:
1149                 term->val.str = str;
1150                 break;
1151         default:
1152                 return -EINVAL;
1153         }
1154
1155         *_term = term;
1156         return 0;
1157 }
1158
1159 int parse_events__term_num(struct parse_events__term **term,
1160                            int type_term, char *config, u64 num)
1161 {
1162         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1163                         config, NULL, num);
1164 }
1165
1166 int parse_events__term_str(struct parse_events__term **term,
1167                            int type_term, char *config, char *str)
1168 {
1169         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1170                         config, str, 0);
1171 }
1172
1173 int parse_events__term_sym_hw(struct parse_events__term **term,
1174                               char *config, unsigned idx)
1175 {
1176         struct event_symbol *sym;
1177
1178         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1179         sym = &event_symbols_hw[idx];
1180
1181         if (config)
1182                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1183                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1184                                 (char *) sym->symbol, 0);
1185         else
1186                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1187                                 PARSE_EVENTS__TERM_TYPE_USER,
1188                                 (char *) "event", (char *) sym->symbol, 0);
1189 }
1190
1191 int parse_events__term_clone(struct parse_events__term **new,
1192                              struct parse_events__term *term)
1193 {
1194         return new_term(new, term->type_val, term->type_term, term->config,
1195                         term->val.str, term->val.num);
1196 }
1197
1198 void parse_events__free_terms(struct list_head *terms)
1199 {
1200         struct parse_events__term *term, *h;
1201
1202         list_for_each_entry_safe(term, h, terms, list)
1203                 free(term);
1204
1205         free(terms);
1206 }