tools/perf/util/parse-events.c

   1 #include <linux/hw_breakpoint.h>
   2 #include <linux/err.h>
   3 #include "util.h"
   4 #include "../perf.h"
   5 #include "evlist.h"
   6 #include "evsel.h"
   7 #include "parse-options.h"
   8 #include "parse-events.h"
   9 #include "exec_cmd.h"
  10 #include "string.h"
  11 #include "symbol.h"
  12 #include "cache.h"
  13 #include "header.h"
  14 #include "debug.h"
  15 #include <api/fs/tracing_path.h>
  16 #include "parse-events-bison.h"
  17 #define YY_EXTRA_TYPE int
  18 #include "parse-events-flex.h"
  19 #include "pmu.h"
  20 #include "thread_map.h"
  21 #include "cpumap.h"
  22 #include "asm/bug.h"
  23
  24 #define MAX_NAME_LEN 100
  25
  26 #ifdef PARSER_DEBUG
  27 extern int parse_events_debug;
  28 #endif
  29 int parse_events_parse(void *data, void *scanner);
  30 static int get_config_terms(struct list_head *head_config,
  31                             struct list_head *head_terms __maybe_unused);
  32
  33 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  34 /*
  35  * The variable indicates the number of supported pmu event symbols.
  36  * 0 means not initialized and ready to init
  37  * -1 means failed to init, don't try anymore
  38  * >0 is the number of supported pmu event symbols
  39  */
  40 static int perf_pmu_events_list_num;
  41
  42 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  43         [PERF_COUNT_HW_CPU_CYCLES] = {
  44                 .symbol = "cpu-cycles",
  45                 .alias  = "cycles",
  46         },
  47         [PERF_COUNT_HW_INSTRUCTIONS] = {
  48                 .symbol = "instructions",
  49                 .alias  = "",
  50         },
  51         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  52                 .symbol = "cache-references",
  53                 .alias  = "",
  54         },
  55         [PERF_COUNT_HW_CACHE_MISSES] = {
  56                 .symbol = "cache-misses",
  57                 .alias  = "",
  58         },
  59         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  60                 .symbol = "branch-instructions",
  61                 .alias  = "branches",
  62         },
  63         [PERF_COUNT_HW_BRANCH_MISSES] = {
  64                 .symbol = "branch-misses",
  65                 .alias  = "",
  66         },
  67         [PERF_COUNT_HW_BUS_CYCLES] = {
  68                 .symbol = "bus-cycles",
  69                 .alias  = "",
  70         },
  71         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  72                 .symbol = "stalled-cycles-frontend",
  73                 .alias  = "idle-cycles-frontend",
  74         },
  75         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  76                 .symbol = "stalled-cycles-backend",
  77                 .alias  = "idle-cycles-backend",
  78         },
  79         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  80                 .symbol = "ref-cycles",
  81                 .alias  = "",
  82         },
  83 };
  84
  85 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  86         [PERF_COUNT_SW_CPU_CLOCK] = {
  87                 .symbol = "cpu-clock",
  88                 .alias  = "",
  89         },
  90         [PERF_COUNT_SW_TASK_CLOCK] = {
  91                 .symbol = "task-clock",
  92                 .alias  = "",
  93         },
  94         [PERF_COUNT_SW_PAGE_FAULTS] = {
  95                 .symbol = "page-faults",
  96                 .alias  = "faults",
  97         },
  98         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  99                 .symbol = "context-switches",
 100                 .alias  = "cs",
 101         },
 102         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 103                 .symbol = "cpu-migrations",
 104                 .alias  = "migrations",
 105         },
 106         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 107                 .symbol = "minor-faults",
 108                 .alias  = "",
 109         },
 110         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 111                 .symbol = "major-faults",
 112                 .alias  = "",
 113         },
 114         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 115                 .symbol = "alignment-faults",
 116                 .alias  = "",
 117         },
 118         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 119                 .symbol = "emulation-faults",
 120                 .alias  = "",
 121         },
 122         [PERF_COUNT_SW_DUMMY] = {
 123                 .symbol = "dummy",
 124                 .alias  = "",
 125         },
 126 };
 127
 128 #define __PERF_EVENT_FIELD(config, name) \
 129         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 130
 131 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 132 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 133 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 134 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 135
 136 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 137         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 138         if (sys_dirent.d_type == DT_DIR &&                                     \
 139            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 140            (strcmp(sys_dirent.d_name, "..")))
 141
 142 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 143 {
 144         char evt_path[MAXPATHLEN];
 145         int fd;
 146
 147         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 148                         sys_dir->d_name, evt_dir->d_name);
 149         fd = open(evt_path, O_RDONLY);
 150         if (fd < 0)
 151                 return -EINVAL;
 152         close(fd);
 153
 154         return 0;
 155 }
 156
 157 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 158         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 159         if (evt_dirent.d_type == DT_DIR &&                                     \
 160            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 161            (strcmp(evt_dirent.d_name, "..")) &&                                \
 162            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 163
 164 #define MAX_EVENT_LENGTH 512
 165
 166
 167 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 168 {
 169         struct tracepoint_path *path = NULL;
 170         DIR *sys_dir, *evt_dir;
 171         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 172         char id_buf[24];
 173         int fd;
 174         u64 id;
 175         char evt_path[MAXPATHLEN];
 176         char dir_path[MAXPATHLEN];
 177
 178         sys_dir = opendir(tracing_events_path);
 179         if (!sys_dir)
 180                 return NULL;
 181
 182         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 183
 184                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 185                          sys_dirent.d_name);
 186                 evt_dir = opendir(dir_path);
 187                 if (!evt_dir)
 188                         continue;
 189
 190                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 191
 192                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 193                                  evt_dirent.d_name);
 194                         fd = open(evt_path, O_RDONLY);
 195                         if (fd < 0)
 196                                 continue;
 197                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 198                                 close(fd);
 199                                 continue;
 200                         }
 201                         close(fd);
 202                         id = atoll(id_buf);
 203                         if (id == config) {
 204                                 closedir(evt_dir);
 205                                 closedir(sys_dir);
 206                                 path = zalloc(sizeof(*path));
 207                                 path->system = malloc(MAX_EVENT_LENGTH);
 208                                 if (!path->system) {
 209                                         free(path);
 210                                         return NULL;
 211                                 }
 212                                 path->name = malloc(MAX_EVENT_LENGTH);
 213                                 if (!path->name) {
 214                                         zfree(&path->system);
 215                                         free(path);
 216                                         return NULL;
 217                                 }
 218                                 strncpy(path->system, sys_dirent.d_name,
 219                                         MAX_EVENT_LENGTH);
 220                                 strncpy(path->name, evt_dirent.d_name,
 221                                         MAX_EVENT_LENGTH);
 222                                 return path;
 223                         }
 224                 }
 225                 closedir(evt_dir);
 226         }
 227
 228         closedir(sys_dir);
 229         return NULL;
 230 }
 231
 232 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 233 {
 234         struct tracepoint_path *path = zalloc(sizeof(*path));
 235         char *str = strchr(name, ':');
 236
 237         if (path == NULL || str == NULL) {
 238                 free(path);
 239                 return NULL;
 240         }
 241
 242         path->system = strndup(name, str - name);
 243         path->name = strdup(str+1);
 244
 245         if (path->system == NULL || path->name == NULL) {
 246                 zfree(&path->system);
 247                 zfree(&path->name);
 248                 free(path);
 249                 path = NULL;
 250         }
 251
 252         return path;
 253 }
 254
 255 const char *event_type(int type)
 256 {
 257         switch (type) {
 258         case PERF_TYPE_HARDWARE:
 259                 return "hardware";
 260
 261         case PERF_TYPE_SOFTWARE:
 262                 return "software";
 263
 264         case PERF_TYPE_TRACEPOINT:
 265                 return "tracepoint";
 266
 267         case PERF_TYPE_HW_CACHE:
 268                 return "hardware-cache";
 269
 270         default:
 271                 break;
 272         }
 273
 274         return "unknown";
 275 }
 276
 277
 278
 279 static struct perf_evsel *
 280 __add_event(struct list_head *list, int *idx,
 281             struct perf_event_attr *attr,
 282             char *name, struct cpu_map *cpus,
 283             struct list_head *config_terms)
 284 {
 285         struct perf_evsel *evsel;
 286
 287         event_attr_init(attr);
 288
 289         evsel = perf_evsel__new_idx(attr, (*idx)++);
 290         if (!evsel)
 291                 return NULL;
 292
 293         evsel->cpus     = cpu_map__get(cpus);
 294         evsel->own_cpus = cpu_map__get(cpus);
 295
 296         if (name)
 297                 evsel->name = strdup(name);
 298
 299         if (config_terms)
 300                 list_splice(config_terms, &evsel->config_terms);
 301
 302         list_add_tail(&evsel->node, list);
 303         return evsel;
 304 }
 305
 306 static int add_event(struct list_head *list, int *idx,
 307                      struct perf_event_attr *attr, char *name,
 308                      struct list_head *config_terms)
 309 {
 310         return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
 311 }
 312
 313 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 314 {
 315         int i, j;
 316         int n, longest = -1;
 317
 318         for (i = 0; i < size; i++) {
 319                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 320                         n = strlen(names[i][j]);
 321                         if (n > longest && !strncasecmp(str, names[i][j], n))
 322                                 longest = n;
 323                 }
 324                 if (longest > 0)
 325                         return i;
 326         }
 327
 328         return -1;
 329 }
 330
 331 int parse_events_add_cache(struct list_head *list, int *idx,
 332                            char *type, char *op_result1, char *op_result2)
 333 {
 334         struct perf_event_attr attr;
 335         char name[MAX_NAME_LEN];
 336         int cache_type = -1, cache_op = -1, cache_result = -1;
 337         char *op_result[2] = { op_result1, op_result2 };
 338         int i, n;
 339
 340         /*
 341          * No fallback - if we cannot get a clear cache type
 342          * then bail out:
 343          */
 344         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 345                                    PERF_COUNT_HW_CACHE_MAX);
 346         if (cache_type == -1)
 347                 return -EINVAL;
 348
 349         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 350
 351         for (i = 0; (i < 2) && (op_result[i]); i++) {
 352                 char *str = op_result[i];
 353
 354                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 355
 356                 if (cache_op == -1) {
 357                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 358                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 359                         if (cache_op >= 0) {
 360                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 361                                         return -EINVAL;
 362                                 continue;
 363                         }
 364                 }
 365
 366                 if (cache_result == -1) {
 367                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 368                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 369                         if (cache_result >= 0)
 370                                 continue;
 371                 }
 372         }
 373
 374         /*
 375          * Fall back to reads:
 376          */
 377         if (cache_op == -1)
 378                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 379
 380         /*
 381          * Fall back to accesses:
 382          */
 383         if (cache_result == -1)
 384                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 385
 386         memset(&attr, 0, sizeof(attr));
 387         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 388         attr.type = PERF_TYPE_HW_CACHE;
 389         return add_event(list, idx, &attr, name, NULL);
 390 }
 391
 392 static void tracepoint_error(struct parse_events_error *e, int err,
 393                              char *sys, char *name)
 394 {
 395         char help[BUFSIZ];
 396
 397         /*
 398          * We get error directly from syscall errno ( > 0),
 399          * or from encoded pointer's error ( < 0).
 400          */
 401         err = abs(err);
 402
 403         switch (err) {
 404         case EACCES:
 405                 e->str = strdup("can't access trace events");
 406                 break;
 407         case ENOENT:
 408                 e->str = strdup("unknown tracepoint");
 409                 break;
 410         default:
 411                 e->str = strdup("failed to add tracepoint");
 412                 break;
 413         }
 414
 415         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 416         e->help = strdup(help);
 417 }
 418
 419 static int add_tracepoint(struct list_head *list, int *idx,
 420                           char *sys_name, char *evt_name,
 421                           struct parse_events_error *err,
 422                           struct list_head *head_config)
 423 {
 424         struct perf_evsel *evsel;
 425
 426         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 427         if (IS_ERR(evsel)) {
 428                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 429                 return PTR_ERR(evsel);
 430         }
 431
 432         if (head_config) {
 433                 LIST_HEAD(config_terms);
 434
 435                 if (get_config_terms(head_config, &config_terms))
 436                         return -ENOMEM;
 437                 list_splice(&config_terms, &evsel->config_terms);
 438         }
 439
 440         list_add_tail(&evsel->node, list);
 441         return 0;
 442 }
 443
 444 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 445                                       char *sys_name, char *evt_name,
 446                                       struct parse_events_error *err,
 447                                       struct list_head *head_config)
 448 {
 449         char evt_path[MAXPATHLEN];
 450         struct dirent *evt_ent;
 451         DIR *evt_dir;
 452         int ret = 0;
 453
 454         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 455         evt_dir = opendir(evt_path);
 456         if (!evt_dir) {
 457                 tracepoint_error(err, errno, sys_name, evt_name);
 458                 return -1;
 459         }
 460
 461         while (!ret && (evt_ent = readdir(evt_dir))) {
 462                 if (!strcmp(evt_ent->d_name, ".")
 463                     || !strcmp(evt_ent->d_name, "..")
 464                     || !strcmp(evt_ent->d_name, "enable")
 465                     || !strcmp(evt_ent->d_name, "filter"))
 466                         continue;
 467
 468                 if (!strglobmatch(evt_ent->d_name, evt_name))
 469                         continue;
 470
 471                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 472                                      err, head_config);
 473         }
 474
 475         closedir(evt_dir);
 476         return ret;
 477 }
 478
 479 static int add_tracepoint_event(struct list_head *list, int *idx,
 480                                 char *sys_name, char *evt_name,
 481                                 struct parse_events_error *err,
 482                                 struct list_head *head_config)
 483 {
 484         return strpbrk(evt_name, "*?") ?
 485                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 486                                           err, head_config) :
 487                add_tracepoint(list, idx, sys_name, evt_name,
 488                               err, head_config);
 489 }
 490
 491 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 492                                     char *sys_name, char *evt_name,
 493                                     struct parse_events_error *err,
 494                                     struct list_head *head_config)
 495 {
 496         struct dirent *events_ent;
 497         DIR *events_dir;
 498         int ret = 0;
 499
 500         events_dir = opendir(tracing_events_path);
 501         if (!events_dir) {
 502                 tracepoint_error(err, errno, sys_name, evt_name);
 503                 return -1;
 504         }
 505
 506         while (!ret && (events_ent = readdir(events_dir))) {
 507                 if (!strcmp(events_ent->d_name, ".")
 508                     || !strcmp(events_ent->d_name, "..")
 509                     || !strcmp(events_ent->d_name, "enable")
 510                     || !strcmp(events_ent->d_name, "header_event")
 511                     || !strcmp(events_ent->d_name, "header_page"))
 512                         continue;
 513
 514                 if (!strglobmatch(events_ent->d_name, sys_name))
 515                         continue;
 516
 517                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 518                                            evt_name, err, head_config);
 519         }
 520
 521         closedir(events_dir);
 522         return ret;
 523 }
 524
 525 static int
 526 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 527 {
 528         int i;
 529
 530         for (i = 0; i < 3; i++) {
 531                 if (!type || !type[i])
 532                         break;
 533
 534 #define CHECK_SET_TYPE(bit)             \
 535 do {                                    \
 536         if (attr->bp_type & bit)        \
 537                 return -EINVAL;         \
 538         else                            \
 539                 attr->bp_type |= bit;   \
 540 } while (0)
 541
 542                 switch (type[i]) {
 543                 case 'r':
 544                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 545                         break;
 546                 case 'w':
 547                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 548                         break;
 549                 case 'x':
 550                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 551                         break;
 552                 default:
 553                         return -EINVAL;
 554                 }
 555         }
 556
 557 #undef CHECK_SET_TYPE
 558
 559         if (!attr->bp_type) /* Default */
 560                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 561
 562         return 0;
 563 }
 564
 565 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 566                                 void *ptr, char *type, u64 len)
 567 {
 568         struct perf_event_attr attr;
 569
 570         memset(&attr, 0, sizeof(attr));
 571         attr.bp_addr = (unsigned long) ptr;
 572
 573         if (parse_breakpoint_type(type, &attr))
 574                 return -EINVAL;
 575
 576         /* Provide some defaults if len is not specified */
 577         if (!len) {
 578                 if (attr.bp_type == HW_BREAKPOINT_X)
 579                         len = sizeof(long);
 580                 else
 581                         len = HW_BREAKPOINT_LEN_4;
 582         }
 583
 584         attr.bp_len = len;
 585
 586         attr.type = PERF_TYPE_BREAKPOINT;
 587         attr.sample_period = 1;
 588
 589         return add_event(list, idx, &attr, NULL, NULL);
 590 }
 591
 592 static int check_type_val(struct parse_events_term *term,
 593                           struct parse_events_error *err,
 594                           int type)
 595 {
 596         if (type == term->type_val)
 597                 return 0;
 598
 599         if (err) {
 600                 err->idx = term->err_val;
 601                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 602                         err->str = strdup("expected numeric value");
 603                 else
 604                         err->str = strdup("expected string value");
 605         }
 606         return -EINVAL;
 607 }
 608
 609 typedef int config_term_func_t(struct perf_event_attr *attr,
 610                                struct parse_events_term *term,
 611                                struct parse_events_error *err);
 612
 613 static int config_term_common(struct perf_event_attr *attr,
 614                               struct parse_events_term *term,
 615                               struct parse_events_error *err)
 616 {
 617 #define CHECK_TYPE_VAL(type)                                               \
 618 do {                                                                       \
 619         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 620                 return -EINVAL;                                            \
 621 } while (0)
 622
 623         switch (term->type_term) {
 624         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 625                 CHECK_TYPE_VAL(NUM);
 626                 attr->config = term->val.num;
 627                 break;
 628         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 629                 CHECK_TYPE_VAL(NUM);
 630                 attr->config1 = term->val.num;
 631                 break;
 632         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 633                 CHECK_TYPE_VAL(NUM);
 634                 attr->config2 = term->val.num;
 635                 break;
 636         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 637                 CHECK_TYPE_VAL(NUM);
 638                 break;
 639         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 640                 CHECK_TYPE_VAL(NUM);
 641                 break;
 642         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 643                 /*
 644                  * TODO uncomment when the field is available
 645                  * attr->branch_sample_type = term->val.num;
 646                  */
 647                 break;
 648         case PARSE_EVENTS__TERM_TYPE_TIME:
 649                 CHECK_TYPE_VAL(NUM);
 650                 if (term->val.num > 1) {
 651                         err->str = strdup("expected 0 or 1");
 652                         err->idx = term->err_val;
 653                         return -EINVAL;
 654                 }
 655                 break;
 656         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 657                 CHECK_TYPE_VAL(STR);
 658                 break;
 659         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 660                 CHECK_TYPE_VAL(NUM);
 661                 break;
 662         case PARSE_EVENTS__TERM_TYPE_NAME:
 663                 CHECK_TYPE_VAL(STR);
 664                 break;
 665         default:
 666                 err->str = strdup("unknown term");
 667                 err->idx = term->err_term;
 668                 err->help = parse_events_formats_error_string(NULL);
 669                 return -EINVAL;
 670         }
 671
 672         return 0;
 673 #undef CHECK_TYPE_VAL
 674 }
 675
 676 static int config_term_pmu(struct perf_event_attr *attr,
 677                            struct parse_events_term *term,
 678                            struct parse_events_error *err)
 679 {
 680         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
 681                 /*
 682                  * Always succeed for sysfs terms, as we dont know
 683                  * at this point what type they need to have.
 684                  */
 685                 return 0;
 686         else
 687                 return config_term_common(attr, term, err);
 688 }
 689
 690 static int config_term_tracepoint(struct perf_event_attr *attr,
 691                                   struct parse_events_term *term,
 692                                   struct parse_events_error *err)
 693 {
 694         switch (term->type_term) {
 695         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 696         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 697                 return config_term_common(attr, term, err);
 698         default:
 699                 if (err) {
 700                         err->idx = term->err_term;
 701                         err->str = strdup("unknown term");
 702                         err->help = strdup("valid terms: call-graph,stack-size\n");
 703                 }
 704                 return -EINVAL;
 705         }
 706
 707         return 0;
 708 }
 709
 710 static int config_attr(struct perf_event_attr *attr,
 711                        struct list_head *head,
 712                        struct parse_events_error *err,
 713                        config_term_func_t config_term)
 714 {
 715         struct parse_events_term *term;
 716
 717         list_for_each_entry(term, head, list)
 718                 if (config_term(attr, term, err))
 719                         return -EINVAL;
 720
 721         return 0;
 722 }
 723
 724 static int get_config_terms(struct list_head *head_config,
 725                             struct list_head *head_terms __maybe_unused)
 726 {
 727 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
 728 do {                                                            \
 729         struct perf_evsel_config_term *__t;                     \
 730                                                                 \
 731         __t = zalloc(sizeof(*__t));                             \
 732         if (!__t)                                               \
 733                 return -ENOMEM;                                 \
 734                                                                 \
 735         INIT_LIST_HEAD(&__t->list);                             \
 736         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
 737         __t->val.__name = __val;                                \
 738         list_add_tail(&__t->list, head_terms);                  \
 739 } while (0)
 740
 741         struct parse_events_term *term;
 742
 743         list_for_each_entry(term, head_config, list) {
 744                 switch (term->type_term) {
 745                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 746                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
 747                         break;
 748                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 749                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
 750                         break;
 751                 case PARSE_EVENTS__TERM_TYPE_TIME:
 752                         ADD_CONFIG_TERM(TIME, time, term->val.num);
 753                         break;
 754                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 755                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
 756                         break;
 757                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 758                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
 759                         break;
 760                 default:
 761                         break;
 762                 }
 763         }
 764 #undef ADD_EVSEL_CONFIG
 765         return 0;
 766 }
 767
 768 int parse_events_add_tracepoint(struct list_head *list, int *idx,
 769                                 char *sys, char *event,
 770                                 struct parse_events_error *err,
 771                                 struct list_head *head_config)
 772 {
 773         if (head_config) {
 774                 struct perf_event_attr attr;
 775
 776                 if (config_attr(&attr, head_config, err,
 777                                 config_term_tracepoint))
 778                         return -EINVAL;
 779         }
 780
 781         if (strpbrk(sys, "*?"))
 782                 return add_tracepoint_multi_sys(list, idx, sys, event,
 783                                                 err, head_config);
 784         else
 785                 return add_tracepoint_event(list, idx, sys, event,
 786                                             err, head_config);
 787 }
 788
 789 int parse_events_add_numeric(struct parse_events_evlist *data,
 790                              struct list_head *list,
 791                              u32 type, u64 config,
 792                              struct list_head *head_config)
 793 {
 794         struct perf_event_attr attr;
 795         LIST_HEAD(config_terms);
 796
 797         memset(&attr, 0, sizeof(attr));
 798         attr.type = type;
 799         attr.config = config;
 800
 801         if (head_config) {
 802                 if (config_attr(&attr, head_config, data->error,
 803                                 config_term_common))
 804                         return -EINVAL;
 805
 806                 if (get_config_terms(head_config, &config_terms))
 807                         return -ENOMEM;
 808         }
 809
 810         return add_event(list, &data->idx, &attr, NULL, &config_terms);
 811 }
 812
 813 static int parse_events__is_name_term(struct parse_events_term *term)
 814 {
 815         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 816 }
 817
 818 static char *pmu_event_name(struct list_head *head_terms)
 819 {
 820         struct parse_events_term *term;
 821
 822         list_for_each_entry(term, head_terms, list)
 823                 if (parse_events__is_name_term(term))
 824                         return term->val.str;
 825
 826         return NULL;
 827 }
 828
 829 int parse_events_add_pmu(struct parse_events_evlist *data,
 830                          struct list_head *list, char *name,
 831                          struct list_head *head_config)
 832 {
 833         struct perf_event_attr attr;
 834         struct perf_pmu_info info;
 835         struct perf_pmu *pmu;
 836         struct perf_evsel *evsel;
 837         LIST_HEAD(config_terms);
 838
 839         pmu = perf_pmu__find(name);
 840         if (!pmu)
 841                 return -EINVAL;
 842
 843         if (pmu->default_config) {
 844                 memcpy(&attr, pmu->default_config,
 845                        sizeof(struct perf_event_attr));
 846         } else {
 847                 memset(&attr, 0, sizeof(attr));
 848         }
 849
 850         if (!head_config) {
 851                 attr.type = pmu->type;
 852                 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
 853                 return evsel ? 0 : -ENOMEM;
 854         }
 855
 856         if (perf_pmu__check_alias(pmu, head_config, &info))
 857                 return -EINVAL;
 858
 859         /*
 860          * Configure hardcoded terms first, no need to check
 861          * return value when called with fail == 0 ;)
 862          */
 863         if (config_attr(&attr, head_config, data->error, config_term_pmu))
 864                 return -EINVAL;
 865
 866         if (get_config_terms(head_config, &config_terms))
 867                 return -ENOMEM;
 868
 869         if (perf_pmu__config(pmu, &attr, head_config, data->error))
 870                 return -EINVAL;
 871
 872         evsel = __add_event(list, &data->idx, &attr,
 873                             pmu_event_name(head_config), pmu->cpus,
 874                             &config_terms);
 875         if (evsel) {
 876                 evsel->unit = info.unit;
 877                 evsel->scale = info.scale;
 878                 evsel->per_pkg = info.per_pkg;
 879                 evsel->snapshot = info.snapshot;
 880         }
 881
 882         return evsel ? 0 : -ENOMEM;
 883 }
 884
 885 int parse_events__modifier_group(struct list_head *list,
 886                                  char *event_mod)
 887 {
 888         return parse_events__modifier_event(list, event_mod, true);
 889 }
 890
 891 void parse_events__set_leader(char *name, struct list_head *list)
 892 {
 893         struct perf_evsel *leader;
 894
 895         if (list_empty(list)) {
 896                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
 897                 return;
 898         }
 899
 900         __perf_evlist__set_leader(list);
 901         leader = list_entry(list->next, struct perf_evsel, node);
 902         leader->group_name = name ? strdup(name) : NULL;
 903 }
 904
 905 /* list_event is assumed to point to malloc'ed memory */
 906 void parse_events_update_lists(struct list_head *list_event,
 907                                struct list_head *list_all)
 908 {
 909         /*
 910          * Called for single event definition. Update the
 911          * 'all event' list, and reinit the 'single event'
 912          * list, for next event definition.
 913          */
 914         list_splice_tail(list_event, list_all);
 915         free(list_event);
 916 }
 917
 918 struct event_modifier {
 919         int eu;
 920         int ek;
 921         int eh;
 922         int eH;
 923         int eG;
 924         int eI;
 925         int precise;
 926         int exclude_GH;
 927         int sample_read;
 928         int pinned;
 929 };
 930
 931 static int get_event_modifier(struct event_modifier *mod, char *str,
 932                                struct perf_evsel *evsel)
 933 {
 934         int eu = evsel ? evsel->attr.exclude_user : 0;
 935         int ek = evsel ? evsel->attr.exclude_kernel : 0;
 936         int eh = evsel ? evsel->attr.exclude_hv : 0;
 937         int eH = evsel ? evsel->attr.exclude_host : 0;
 938         int eG = evsel ? evsel->attr.exclude_guest : 0;
 939         int eI = evsel ? evsel->attr.exclude_idle : 0;
 940         int precise = evsel ? evsel->attr.precise_ip : 0;
 941         int sample_read = 0;
 942         int pinned = evsel ? evsel->attr.pinned : 0;
 943
 944         int exclude = eu | ek | eh;
 945         int exclude_GH = evsel ? evsel->exclude_GH : 0;
 946
 947         memset(mod, 0, sizeof(*mod));
 948
 949         while (*str) {
 950                 if (*str == 'u') {
 951                         if (!exclude)
 952                                 exclude = eu = ek = eh = 1;
 953                         eu = 0;
 954                 } else if (*str == 'k') {
 955                         if (!exclude)
 956                                 exclude = eu = ek = eh = 1;
 957                         ek = 0;
 958                 } else if (*str == 'h') {
 959                         if (!exclude)
 960                                 exclude = eu = ek = eh = 1;
 961                         eh = 0;
 962                 } else if (*str == 'G') {
 963                         if (!exclude_GH)
 964                                 exclude_GH = eG = eH = 1;
 965                         eG = 0;
 966                 } else if (*str == 'H') {
 967                         if (!exclude_GH)
 968                                 exclude_GH = eG = eH = 1;
 969                         eH = 0;
 970                 } else if (*str == 'I') {
 971                         eI = 1;
 972                 } else if (*str == 'p') {
 973                         precise++;
 974                         /* use of precise requires exclude_guest */
 975                         if (!exclude_GH)
 976                                 eG = 1;
 977                 } else if (*str == 'S') {
 978                         sample_read = 1;
 979                 } else if (*str == 'D') {
 980                         pinned = 1;
 981                 } else
 982                         break;
 983
 984                 ++str;
 985         }
 986
 987         /*
 988          * precise ip:
 989          *
 990          *  0 - SAMPLE_IP can have arbitrary skid
 991          *  1 - SAMPLE_IP must have constant skid
 992          *  2 - SAMPLE_IP requested to have 0 skid
 993          *  3 - SAMPLE_IP must have 0 skid
 994          *
 995          *  See also PERF_RECORD_MISC_EXACT_IP
 996          */
 997         if (precise > 3)
 998                 return -EINVAL;
 999
1000         mod->eu = eu;
1001         mod->ek = ek;
1002         mod->eh = eh;
1003         mod->eH = eH;
1004         mod->eG = eG;
1005         mod->eI = eI;
1006         mod->precise = precise;
1007         mod->exclude_GH = exclude_GH;
1008         mod->sample_read = sample_read;
1009         mod->pinned = pinned;
1010
1011         return 0;
1012 }
1013
1014 /*
1015  * Basic modifier sanity check to validate it contains only one
1016  * instance of any modifier (apart from 'p') present.
1017  */
1018 static int check_modifier(char *str)
1019 {
1020         char *p = str;
1021
1022         /* The sizeof includes 0 byte as well. */
1023         if (strlen(str) > (sizeof("ukhGHpppSDI") - 1))
1024                 return -1;
1025
1026         while (*p) {
1027                 if (*p != 'p' && strchr(p + 1, *p))
1028                         return -1;
1029                 p++;
1030         }
1031
1032         return 0;
1033 }
1034
1035 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1036 {
1037         struct perf_evsel *evsel;
1038         struct event_modifier mod;
1039
1040         if (str == NULL)
1041                 return 0;
1042
1043         if (check_modifier(str))
1044                 return -EINVAL;
1045
1046         if (!add && get_event_modifier(&mod, str, NULL))
1047                 return -EINVAL;
1048
1049         __evlist__for_each(list, evsel) {
1050                 if (add && get_event_modifier(&mod, str, evsel))
1051                         return -EINVAL;
1052
1053                 evsel->attr.exclude_user   = mod.eu;
1054                 evsel->attr.exclude_kernel = mod.ek;
1055                 evsel->attr.exclude_hv     = mod.eh;
1056                 evsel->attr.precise_ip     = mod.precise;
1057                 evsel->attr.exclude_host   = mod.eH;
1058                 evsel->attr.exclude_guest  = mod.eG;
1059                 evsel->attr.exclude_idle   = mod.eI;
1060                 evsel->exclude_GH          = mod.exclude_GH;
1061                 evsel->sample_read         = mod.sample_read;
1062
1063                 if (perf_evsel__is_group_leader(evsel))
1064                         evsel->attr.pinned = mod.pinned;
1065         }
1066
1067         return 0;
1068 }
1069
1070 int parse_events_name(struct list_head *list, char *name)
1071 {
1072         struct perf_evsel *evsel;
1073
1074         __evlist__for_each(list, evsel) {
1075                 if (!evsel->name)
1076                         evsel->name = strdup(name);
1077         }
1078
1079         return 0;
1080 }
1081
1082 static int
1083 comp_pmu(const void *p1, const void *p2)
1084 {
1085         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1086         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1087
1088         return strcmp(pmu1->symbol, pmu2->symbol);
1089 }
1090
1091 static void perf_pmu__parse_cleanup(void)
1092 {
1093         if (perf_pmu_events_list_num > 0) {
1094                 struct perf_pmu_event_symbol *p;
1095                 int i;
1096
1097                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1098                         p = perf_pmu_events_list + i;
1099                         free(p->symbol);
1100                 }
1101                 free(perf_pmu_events_list);
1102                 perf_pmu_events_list = NULL;
1103                 perf_pmu_events_list_num = 0;
1104         }
1105 }
1106
1107 #define SET_SYMBOL(str, stype)          \
1108 do {                                    \
1109         p->symbol = str;                \
1110         if (!p->symbol)                 \
1111                 goto err;               \
1112         p->type = stype;                \
1113 } while (0)
1114
1115 /*
1116  * Read the pmu events list from sysfs
1117  * Save it into perf_pmu_events_list
1118  */
1119 static void perf_pmu__parse_init(void)
1120 {
1121
1122         struct perf_pmu *pmu = NULL;
1123         struct perf_pmu_alias *alias;
1124         int len = 0;
1125
1126         pmu = perf_pmu__find("cpu");
1127         if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1128                 perf_pmu_events_list_num = -1;
1129                 return;
1130         }
1131         list_for_each_entry(alias, &pmu->aliases, list) {
1132                 if (strchr(alias->name, '-'))
1133                         len++;
1134                 len++;
1135         }
1136         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1137         if (!perf_pmu_events_list)
1138                 return;
1139         perf_pmu_events_list_num = len;
1140
1141         len = 0;
1142         list_for_each_entry(alias, &pmu->aliases, list) {
1143                 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1144                 char *tmp = strchr(alias->name, '-');
1145
1146                 if (tmp != NULL) {
1147                         SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1148                                         PMU_EVENT_SYMBOL_PREFIX);
1149                         p++;
1150                         SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1151                         len += 2;
1152                 } else {
1153                         SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1154                         len++;
1155                 }
1156         }
1157         qsort(perf_pmu_events_list, len,
1158                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1159
1160         return;
1161 err:
1162         perf_pmu__parse_cleanup();
1163 }
1164
1165 enum perf_pmu_event_symbol_type
1166 perf_pmu__parse_check(const char *name)
1167 {
1168         struct perf_pmu_event_symbol p, *r;
1169
1170         /* scan kernel pmu events from sysfs if needed */
1171         if (perf_pmu_events_list_num == 0)
1172                 perf_pmu__parse_init();
1173         /*
1174          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1175          * cpu-cycles has been handled by hardcode.
1176          * So it must be cpu// events, not kernel pmu event.
1177          */
1178         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1179                 return PMU_EVENT_SYMBOL_ERR;
1180
1181         p.symbol = strdup(name);
1182         r = bsearch(&p, perf_pmu_events_list,
1183                         (size_t) perf_pmu_events_list_num,
1184                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1185         free(p.symbol);
1186         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1187 }
1188
1189 static int parse_events__scanner(const char *str, void *data, int start_token)
1190 {
1191         YY_BUFFER_STATE buffer;
1192         void *scanner;
1193         int ret;
1194
1195         ret = parse_events_lex_init_extra(start_token, &scanner);
1196         if (ret)
1197                 return ret;
1198
1199         buffer = parse_events__scan_string(str, scanner);
1200
1201 #ifdef PARSER_DEBUG
1202         parse_events_debug = 1;
1203 #endif
1204         ret = parse_events_parse(data, scanner);
1205
1206         parse_events__flush_buffer(buffer, scanner);
1207         parse_events__delete_buffer(buffer, scanner);
1208         parse_events_lex_destroy(scanner);
1209         return ret;
1210 }
1211
1212 /*
1213  * parse event config string, return a list of event terms.
1214  */
1215 int parse_events_terms(struct list_head *terms, const char *str)
1216 {
1217         struct parse_events_terms data = {
1218                 .terms = NULL,
1219         };
1220         int ret;
1221
1222         ret = parse_events__scanner(str, &data, PE_START_TERMS);
1223         if (!ret) {
1224                 list_splice(data.terms, terms);
1225                 zfree(&data.terms);
1226                 return 0;
1227         }
1228
1229         if (data.terms)
1230                 parse_events__free_terms(data.terms);
1231         return ret;
1232 }
1233
1234 int parse_events(struct perf_evlist *evlist, const char *str,
1235                  struct parse_events_error *err)
1236 {
1237         struct parse_events_evlist data = {
1238                 .list  = LIST_HEAD_INIT(data.list),
1239                 .idx   = evlist->nr_entries,
1240                 .error = err,
1241         };
1242         int ret;
1243
1244         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1245         perf_pmu__parse_cleanup();
1246         if (!ret) {
1247                 struct perf_evsel *last;
1248
1249                 if (list_empty(&data.list)) {
1250                         WARN_ONCE(true, "WARNING: event parser found nothing");
1251                         return -1;
1252                 }
1253
1254                 perf_evlist__splice_list_tail(evlist, &data.list);
1255                 evlist->nr_groups += data.nr_groups;
1256                 last = perf_evlist__last(evlist);
1257                 last->cmdline_group_boundary = true;
1258
1259                 return 0;
1260         }
1261
1262         /*
1263          * There are 2 users - builtin-record and builtin-test objects.
1264          * Both call perf_evlist__delete in case of error, so we dont
1265          * need to bother.
1266          */
1267         return ret;
1268 }
1269
1270 #define MAX_WIDTH 1000
1271 static int get_term_width(void)
1272 {
1273         struct winsize ws;
1274
1275         get_term_dimensions(&ws);
1276         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1277 }
1278
1279 static void parse_events_print_error(struct parse_events_error *err,
1280                                      const char *event)
1281 {
1282         const char *str = "invalid or unsupported event: ";
1283         char _buf[MAX_WIDTH];
1284         char *buf = (char *) event;
1285         int idx = 0;
1286
1287         if (err->str) {
1288                 /* -2 for extra '' in the final fprintf */
1289                 int width       = get_term_width() - 2;
1290                 int len_event   = strlen(event);
1291                 int len_str, max_len, cut = 0;
1292
1293                 /*
1294                  * Maximum error index indent, we will cut
1295                  * the event string if it's bigger.
1296                  */
1297                 int max_err_idx = 13;
1298
1299                 /*
1300                  * Let's be specific with the message when
1301                  * we have the precise error.
1302                  */
1303                 str     = "event syntax error: ";
1304                 len_str = strlen(str);
1305                 max_len = width - len_str;
1306
1307                 buf = _buf;
1308
1309                 /* We're cutting from the beggining. */
1310                 if (err->idx > max_err_idx)
1311                         cut = err->idx - max_err_idx;
1312
1313                 strncpy(buf, event + cut, max_len);
1314
1315                 /* Mark cut parts with '..' on both sides. */
1316                 if (cut)
1317                         buf[0] = buf[1] = '.';
1318
1319                 if ((len_event - cut) > max_len) {
1320                         buf[max_len - 1] = buf[max_len - 2] = '.';
1321                         buf[max_len] = 0;
1322                 }
1323
1324                 idx = len_str + err->idx - cut;
1325         }
1326
1327         fprintf(stderr, "%s'%s'\n", str, buf);
1328         if (idx) {
1329                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1330                 if (err->help)
1331                         fprintf(stderr, "\n%s\n", err->help);
1332                 free(err->str);
1333                 free(err->help);
1334         }
1335
1336         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1337 }
1338
1339 #undef MAX_WIDTH
1340
1341 int parse_events_option(const struct option *opt, const char *str,
1342                         int unset __maybe_unused)
1343 {
1344         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1345         struct parse_events_error err = { .idx = 0, };
1346         int ret = parse_events(evlist, str, &err);
1347
1348         if (ret)
1349                 parse_events_print_error(&err, str);
1350
1351         return ret;
1352 }
1353
1354 static int
1355 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1356                            int (*func)(struct perf_evsel *evsel,
1357                                        const void *arg),
1358                            const void *arg)
1359 {
1360         struct perf_evsel *last = NULL;
1361         int err;
1362
1363         /*
1364          * Don't return when list_empty, give func a chance to report
1365          * error when it found last == NULL.
1366          *
1367          * So no need to WARN here, let *func do this.
1368          */
1369         if (evlist->nr_entries > 0)
1370                 last = perf_evlist__last(evlist);
1371
1372         do {
1373                 err = (*func)(last, arg);
1374                 if (err)
1375                         return -1;
1376                 if (!last)
1377                         return 0;
1378
1379                 if (last->node.prev == &evlist->entries)
1380                         return 0;
1381                 last = list_entry(last->node.prev, struct perf_evsel, node);
1382         } while (!last->cmdline_group_boundary);
1383
1384         return 0;
1385 }
1386
1387 static int set_filter(struct perf_evsel *evsel, const void *arg)
1388 {
1389         const char *str = arg;
1390
1391         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1392                 fprintf(stderr,
1393                         "--filter option should follow a -e tracepoint option\n");
1394                 return -1;
1395         }
1396
1397         if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1398                 fprintf(stderr,
1399                         "not enough memory to hold filter string\n");
1400                 return -1;
1401         }
1402
1403         return 0;
1404 }
1405
1406 int parse_filter(const struct option *opt, const char *str,
1407                  int unset __maybe_unused)
1408 {
1409         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1410
1411         return foreach_evsel_in_last_glob(evlist, set_filter,
1412                                           (const void *)str);
1413 }
1414
1415 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1416                                    const void *arg __maybe_unused)
1417 {
1418         char new_filter[64];
1419
1420         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1421                 fprintf(stderr,
1422                         "--exclude-perf option should follow a -e tracepoint option\n");
1423                 return -1;
1424         }
1425
1426         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1427
1428         if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1429                 fprintf(stderr,
1430                         "not enough memory to hold filter string\n");
1431                 return -1;
1432         }
1433
1434         return 0;
1435 }
1436
1437 int exclude_perf(const struct option *opt,
1438                  const char *arg __maybe_unused,
1439                  int unset __maybe_unused)
1440 {
1441         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1442
1443         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1444                                           NULL);
1445 }
1446
1447 static const char * const event_type_descriptors[] = {
1448         "Hardware event",
1449         "Software event",
1450         "Tracepoint event",
1451         "Hardware cache event",
1452         "Raw hardware event descriptor",
1453         "Hardware breakpoint",
1454 };
1455
1456 static int cmp_string(const void *a, const void *b)
1457 {
1458         const char * const *as = a;
1459         const char * const *bs = b;
1460
1461         return strcmp(*as, *bs);
1462 }
1463
1464 /*
1465  * Print the events from <debugfs_mount_point>/tracing/events
1466  */
1467
1468 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1469                              bool name_only)
1470 {
1471         DIR *sys_dir, *evt_dir;
1472         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1473         char evt_path[MAXPATHLEN];
1474         char dir_path[MAXPATHLEN];
1475         char **evt_list = NULL;
1476         unsigned int evt_i = 0, evt_num = 0;
1477         bool evt_num_known = false;
1478
1479 restart:
1480         sys_dir = opendir(tracing_events_path);
1481         if (!sys_dir)
1482                 return;
1483
1484         if (evt_num_known) {
1485                 evt_list = zalloc(sizeof(char *) * evt_num);
1486                 if (!evt_list)
1487                         goto out_close_sys_dir;
1488         }
1489
1490         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1491                 if (subsys_glob != NULL &&
1492                     !strglobmatch(sys_dirent.d_name, subsys_glob))
1493                         continue;
1494
1495                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1496                          sys_dirent.d_name);
1497                 evt_dir = opendir(dir_path);
1498                 if (!evt_dir)
1499                         continue;
1500
1501                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1502                         if (event_glob != NULL &&
1503                             !strglobmatch(evt_dirent.d_name, event_glob))
1504                                 continue;
1505
1506                         if (!evt_num_known) {
1507                                 evt_num++;
1508                                 continue;
1509                         }
1510
1511                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1512                                  sys_dirent.d_name, evt_dirent.d_name);
1513
1514                         evt_list[evt_i] = strdup(evt_path);
1515                         if (evt_list[evt_i] == NULL)
1516                                 goto out_close_evt_dir;
1517                         evt_i++;
1518                 }
1519                 closedir(evt_dir);
1520         }
1521         closedir(sys_dir);
1522
1523         if (!evt_num_known) {
1524                 evt_num_known = true;
1525                 goto restart;
1526         }
1527         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1528         evt_i = 0;
1529         while (evt_i < evt_num) {
1530                 if (name_only) {
1531                         printf("%s ", evt_list[evt_i++]);
1532                         continue;
1533                 }
1534                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1535                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1536         }
1537         if (evt_num)
1538                 printf("\n");
1539
1540 out_free:
1541         evt_num = evt_i;
1542         for (evt_i = 0; evt_i < evt_num; evt_i++)
1543                 zfree(&evt_list[evt_i]);
1544         zfree(&evt_list);
1545         return;
1546
1547 out_close_evt_dir:
1548         closedir(evt_dir);
1549 out_close_sys_dir:
1550         closedir(sys_dir);
1551
1552         printf("FATAL: not enough memory to print %s\n",
1553                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1554         if (evt_list)
1555                 goto out_free;
1556 }
1557
1558 /*
1559  * Check whether event is in <debugfs_mount_point>/tracing/events
1560  */
1561
1562 int is_valid_tracepoint(const char *event_string)
1563 {
1564         DIR *sys_dir, *evt_dir;
1565         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1566         char evt_path[MAXPATHLEN];
1567         char dir_path[MAXPATHLEN];
1568
1569         sys_dir = opendir(tracing_events_path);
1570         if (!sys_dir)
1571                 return 0;
1572
1573         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1574
1575                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1576                          sys_dirent.d_name);
1577                 evt_dir = opendir(dir_path);
1578                 if (!evt_dir)
1579                         continue;
1580
1581                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1582                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1583                                  sys_dirent.d_name, evt_dirent.d_name);
1584                         if (!strcmp(evt_path, event_string)) {
1585                                 closedir(evt_dir);
1586                                 closedir(sys_dir);
1587                                 return 1;
1588                         }
1589                 }
1590                 closedir(evt_dir);
1591         }
1592         closedir(sys_dir);
1593         return 0;
1594 }
1595
1596 static bool is_event_supported(u8 type, unsigned config)
1597 {
1598         bool ret = true;
1599         int open_return;
1600         struct perf_evsel *evsel;
1601         struct perf_event_attr attr = {
1602                 .type = type,
1603                 .config = config,
1604                 .disabled = 1,
1605         };
1606         struct {
1607                 struct thread_map map;
1608                 int threads[1];
1609         } tmap = {
1610                 .map.nr  = 1,
1611                 .threads = { 0 },
1612         };
1613
1614         evsel = perf_evsel__new(&attr);
1615         if (evsel) {
1616                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1617                 ret = open_return >= 0;
1618
1619                 if (open_return == -EACCES) {
1620                         /*
1621                          * This happens if the paranoid value
1622                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1623                          * Re-run with exclude_kernel set; we don't do that
1624                          * by default as some ARM machines do not support it.
1625                          *
1626                          */
1627                         evsel->attr.exclude_kernel = 1;
1628                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1629                 }
1630                 perf_evsel__delete(evsel);
1631         }
1632
1633         return ret;
1634 }
1635
1636 int print_hwcache_events(const char *event_glob, bool name_only)
1637 {
1638         unsigned int type, op, i, evt_i = 0, evt_num = 0;
1639         char name[64];
1640         char **evt_list = NULL;
1641         bool evt_num_known = false;
1642
1643 restart:
1644         if (evt_num_known) {
1645                 evt_list = zalloc(sizeof(char *) * evt_num);
1646                 if (!evt_list)
1647                         goto out_enomem;
1648         }
1649
1650         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1651                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1652                         /* skip invalid cache type */
1653                         if (!perf_evsel__is_cache_op_valid(type, op))
1654                                 continue;
1655
1656                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1657                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1658                                                                         name, sizeof(name));
1659                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1660                                         continue;
1661
1662                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1663                                                         type | (op << 8) | (i << 16)))
1664                                         continue;
1665
1666                                 if (!evt_num_known) {
1667                                         evt_num++;
1668                                         continue;
1669                                 }
1670
1671                                 evt_list[evt_i] = strdup(name);
1672                                 if (evt_list[evt_i] == NULL)
1673                                         goto out_enomem;
1674                                 evt_i++;
1675                         }
1676                 }
1677         }
1678
1679         if (!evt_num_known) {
1680                 evt_num_known = true;
1681                 goto restart;
1682         }
1683         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1684         evt_i = 0;
1685         while (evt_i < evt_num) {
1686                 if (name_only) {
1687                         printf("%s ", evt_list[evt_i++]);
1688                         continue;
1689                 }
1690                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1691                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1692         }
1693         if (evt_num)
1694                 printf("\n");
1695
1696 out_free:
1697         evt_num = evt_i;
1698         for (evt_i = 0; evt_i < evt_num; evt_i++)
1699                 zfree(&evt_list[evt_i]);
1700         zfree(&evt_list);
1701         return evt_num;
1702
1703 out_enomem:
1704         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1705         if (evt_list)
1706                 goto out_free;
1707         return evt_num;
1708 }
1709
1710 void print_symbol_events(const char *event_glob, unsigned type,
1711                                 struct event_symbol *syms, unsigned max,
1712                                 bool name_only)
1713 {
1714         unsigned int i, evt_i = 0, evt_num = 0;
1715         char name[MAX_NAME_LEN];
1716         char **evt_list = NULL;
1717         bool evt_num_known = false;
1718
1719 restart:
1720         if (evt_num_known) {
1721                 evt_list = zalloc(sizeof(char *) * evt_num);
1722                 if (!evt_list)
1723                         goto out_enomem;
1724                 syms -= max;
1725         }
1726
1727         for (i = 0; i < max; i++, syms++) {
1728
1729                 if (event_glob != NULL &&
1730                     !(strglobmatch(syms->symbol, event_glob) ||
1731                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1732                         continue;
1733
1734                 if (!is_event_supported(type, i))
1735                         continue;
1736
1737                 if (!evt_num_known) {
1738                         evt_num++;
1739                         continue;
1740                 }
1741
1742                 if (!name_only && strlen(syms->alias))
1743                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1744                 else
1745                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1746
1747                 evt_list[evt_i] = strdup(name);
1748                 if (evt_list[evt_i] == NULL)
1749                         goto out_enomem;
1750                 evt_i++;
1751         }
1752
1753         if (!evt_num_known) {
1754                 evt_num_known = true;
1755                 goto restart;
1756         }
1757         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1758         evt_i = 0;
1759         while (evt_i < evt_num) {
1760                 if (name_only) {
1761                         printf("%s ", evt_list[evt_i++]);
1762                         continue;
1763                 }
1764                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1765         }
1766         if (evt_num)
1767                 printf("\n");
1768
1769 out_free:
1770         evt_num = evt_i;
1771         for (evt_i = 0; evt_i < evt_num; evt_i++)
1772                 zfree(&evt_list[evt_i]);
1773         zfree(&evt_list);
1774         return;
1775
1776 out_enomem:
1777         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1778         if (evt_list)
1779                 goto out_free;
1780 }
1781
1782 /*
1783  * Print the help text for the event symbols:
1784  */
1785 void print_events(const char *event_glob, bool name_only)
1786 {
1787         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1788                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1789
1790         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1791                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1792
1793         print_hwcache_events(event_glob, name_only);
1794
1795         print_pmu_events(event_glob, name_only);
1796
1797         if (event_glob != NULL)
1798                 return;
1799
1800         if (!name_only) {
1801                 printf("  %-50s [%s]\n",
1802                        "rNNN",
1803                        event_type_descriptors[PERF_TYPE_RAW]);
1804                 printf("  %-50s [%s]\n",
1805                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1806                        event_type_descriptors[PERF_TYPE_RAW]);
1807                 printf("   (see 'man perf-list' on how to encode it)\n");
1808                 printf("\n");
1809
1810                 printf("  %-50s [%s]\n",
1811                        "mem:<addr>[/len][:access]",
1812                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1813                 printf("\n");
1814         }
1815
1816         print_tracepoint_events(NULL, NULL, name_only);
1817 }
1818
1819 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1820 {
1821         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1822 }
1823
1824 static int new_term(struct parse_events_term **_term, int type_val,
1825                     int type_term, char *config,
1826                     char *str, u64 num, int err_term, int err_val)
1827 {
1828         struct parse_events_term *term;
1829
1830         term = zalloc(sizeof(*term));
1831         if (!term)
1832                 return -ENOMEM;
1833
1834         INIT_LIST_HEAD(&term->list);
1835         term->type_val  = type_val;
1836         term->type_term = type_term;
1837         term->config = config;
1838         term->err_term = err_term;
1839         term->err_val  = err_val;
1840
1841         switch (type_val) {
1842         case PARSE_EVENTS__TERM_TYPE_NUM:
1843                 term->val.num = num;
1844                 break;
1845         case PARSE_EVENTS__TERM_TYPE_STR:
1846                 term->val.str = str;
1847                 break;
1848         default:
1849                 free(term);
1850                 return -EINVAL;
1851         }
1852
1853         *_term = term;
1854         return 0;
1855 }
1856
1857 int parse_events_term__num(struct parse_events_term **term,
1858                            int type_term, char *config, u64 num,
1859                            void *loc_term_, void *loc_val_)
1860 {
1861         YYLTYPE *loc_term = loc_term_;
1862         YYLTYPE *loc_val = loc_val_;
1863
1864         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1865                         config, NULL, num,
1866                         loc_term ? loc_term->first_column : 0,
1867                         loc_val ? loc_val->first_column : 0);
1868 }
1869
1870 int parse_events_term__str(struct parse_events_term **term,
1871                            int type_term, char *config, char *str,
1872                            void *loc_term_, void *loc_val_)
1873 {
1874         YYLTYPE *loc_term = loc_term_;
1875         YYLTYPE *loc_val = loc_val_;
1876
1877         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1878                         config, str, 0,
1879                         loc_term ? loc_term->first_column : 0,
1880                         loc_val ? loc_val->first_column : 0);
1881 }
1882
1883 int parse_events_term__sym_hw(struct parse_events_term **term,
1884                               char *config, unsigned idx)
1885 {
1886         struct event_symbol *sym;
1887
1888         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1889         sym = &event_symbols_hw[idx];
1890
1891         if (config)
1892                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1893                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1894                                 (char *) sym->symbol, 0, 0, 0);
1895         else
1896                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1897                                 PARSE_EVENTS__TERM_TYPE_USER,
1898                                 (char *) "event", (char *) sym->symbol,
1899                                 0, 0, 0);
1900 }
1901
1902 int parse_events_term__clone(struct parse_events_term **new,
1903                              struct parse_events_term *term)
1904 {
1905         return new_term(new, term->type_val, term->type_term, term->config,
1906                         term->val.str, term->val.num,
1907                         term->err_term, term->err_val);
1908 }
1909
1910 void parse_events__free_terms(struct list_head *terms)
1911 {
1912         struct parse_events_term *term, *h;
1913
1914         list_for_each_entry_safe(term, h, terms, list)
1915                 free(term);
1916 }
1917
1918 void parse_events_evlist_error(struct parse_events_evlist *data,
1919                                int idx, const char *str)
1920 {
1921         struct parse_events_error *err = data->error;
1922
1923         if (!err)
1924                 return;
1925         err->idx = idx;
1926         err->str = strdup(str);
1927         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
1928 }
1929
1930 /*
1931  * Return string contains valid config terms of an event.
1932  * @additional_terms: For terms such as PMU sysfs terms.
1933  */
1934 char *parse_events_formats_error_string(char *additional_terms)
1935 {
1936         char *str;
1937         static const char *static_terms = "config,config1,config2,name,"
1938                                           "period,freq,branch_type,time,"
1939                                           "call-graph,stack-size\n";
1940
1941         /* valid terms */
1942         if (additional_terms) {
1943                 if (!asprintf(&str, "valid terms: %s,%s",
1944                               additional_terms, static_terms))
1945                         goto fail;
1946         } else {
1947                 if (!asprintf(&str, "valid terms: %s", static_terms))
1948                         goto fail;
1949         }
1950         return str;
1951
1952 fail:
1953         return NULL;
1954 }