tools/perf/util/parse-events.c

   1 #include <linux/hw_breakpoint.h>
   2 #include <linux/err.h>
   3 #include <dirent.h>
   4 #include <errno.h>
   5 #include <sys/ioctl.h>
   6 #include <sys/param.h>
   7 #include "term.h"
   8 #include "../perf.h"
   9 #include "evlist.h"
  10 #include "evsel.h"
  11 #include <subcmd/parse-options.h>
  12 #include "parse-events.h"
  13 #include <subcmd/exec-cmd.h>
  14 #include "string2.h"
  15 #include "strlist.h"
  16 #include "symbol.h"
  17 #include "cache.h"
  18 #include "header.h"
  19 #include "bpf-loader.h"
  20 #include "debug.h"
  21 #include <api/fs/tracing_path.h>
  22 #include "parse-events-bison.h"
  23 #define YY_EXTRA_TYPE int
  24 #include "parse-events-flex.h"
  25 #include "pmu.h"
  26 #include "thread_map.h"
  27 #include "cpumap.h"
  28 #include "probe-file.h"
  29 #include "asm/bug.h"
  30 #include "util/parse-branch-options.h"
  31
  32 #define MAX_NAME_LEN 100
  33
  34 #ifdef PARSER_DEBUG
  35 extern int parse_events_debug;
  36 #endif
  37 int parse_events_parse(void *parse_state, void *scanner);
  38 static int get_config_terms(struct list_head *head_config,
  39                             struct list_head *head_terms __maybe_unused);
  40
  41 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  42 /*
  43  * The variable indicates the number of supported pmu event symbols.
  44  * 0 means not initialized and ready to init
  45  * -1 means failed to init, don't try anymore
  46  * >0 is the number of supported pmu event symbols
  47  */
  48 static int perf_pmu_events_list_num;
  49
  50 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  51         [PERF_COUNT_HW_CPU_CYCLES] = {
  52                 .symbol = "cpu-cycles",
  53                 .alias  = "cycles",
  54         },
  55         [PERF_COUNT_HW_INSTRUCTIONS] = {
  56                 .symbol = "instructions",
  57                 .alias  = "",
  58         },
  59         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  60                 .symbol = "cache-references",
  61                 .alias  = "",
  62         },
  63         [PERF_COUNT_HW_CACHE_MISSES] = {
  64                 .symbol = "cache-misses",
  65                 .alias  = "",
  66         },
  67         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  68                 .symbol = "branch-instructions",
  69                 .alias  = "branches",
  70         },
  71         [PERF_COUNT_HW_BRANCH_MISSES] = {
  72                 .symbol = "branch-misses",
  73                 .alias  = "",
  74         },
  75         [PERF_COUNT_HW_BUS_CYCLES] = {
  76                 .symbol = "bus-cycles",
  77                 .alias  = "",
  78         },
  79         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  80                 .symbol = "stalled-cycles-frontend",
  81                 .alias  = "idle-cycles-frontend",
  82         },
  83         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  84                 .symbol = "stalled-cycles-backend",
  85                 .alias  = "idle-cycles-backend",
  86         },
  87         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  88                 .symbol = "ref-cycles",
  89                 .alias  = "",
  90         },
  91 };
  92
  93 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  94         [PERF_COUNT_SW_CPU_CLOCK] = {
  95                 .symbol = "cpu-clock",
  96                 .alias  = "",
  97         },
  98         [PERF_COUNT_SW_TASK_CLOCK] = {
  99                 .symbol = "task-clock",
 100                 .alias  = "",
 101         },
 102         [PERF_COUNT_SW_PAGE_FAULTS] = {
 103                 .symbol = "page-faults",
 104                 .alias  = "faults",
 105         },
 106         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 107                 .symbol = "context-switches",
 108                 .alias  = "cs",
 109         },
 110         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 111                 .symbol = "cpu-migrations",
 112                 .alias  = "migrations",
 113         },
 114         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 115                 .symbol = "minor-faults",
 116                 .alias  = "",
 117         },
 118         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 119                 .symbol = "major-faults",
 120                 .alias  = "",
 121         },
 122         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 123                 .symbol = "alignment-faults",
 124                 .alias  = "",
 125         },
 126         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 127                 .symbol = "emulation-faults",
 128                 .alias  = "",
 129         },
 130         [PERF_COUNT_SW_DUMMY] = {
 131                 .symbol = "dummy",
 132                 .alias  = "",
 133         },
 134         [PERF_COUNT_SW_BPF_OUTPUT] = {
 135                 .symbol = "bpf-output",
 136                 .alias  = "",
 137         },
 138 };
 139
 140 #define __PERF_EVENT_FIELD(config, name) \
 141         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 142
 143 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 144 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 145 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 146 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 147
 148 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 149         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 150                 if (sys_dirent->d_type == DT_DIR &&             \
 151                     (strcmp(sys_dirent->d_name, ".")) &&        \
 152                     (strcmp(sys_dirent->d_name, "..")))
 153
 154 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 155 {
 156         char evt_path[MAXPATHLEN];
 157         int fd;
 158
 159         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 160                         sys_dir->d_name, evt_dir->d_name);
 161         fd = open(evt_path, O_RDONLY);
 162         if (fd < 0)
 163                 return -EINVAL;
 164         close(fd);
 165
 166         return 0;
 167 }
 168
 169 #define for_each_event(sys_dirent, evt_dir, evt_dirent)         \
 170         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 171                 if (evt_dirent->d_type == DT_DIR &&             \
 172                     (strcmp(evt_dirent->d_name, ".")) &&        \
 173                     (strcmp(evt_dirent->d_name, "..")) &&       \
 174                     (!tp_event_has_id(sys_dirent, evt_dirent)))
 175
 176 #define MAX_EVENT_LENGTH 512
 177
 178
 179 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 180 {
 181         struct tracepoint_path *path = NULL;
 182         DIR *sys_dir, *evt_dir;
 183         struct dirent *sys_dirent, *evt_dirent;
 184         char id_buf[24];
 185         int fd;
 186         u64 id;
 187         char evt_path[MAXPATHLEN];
 188         char dir_path[MAXPATHLEN];
 189
 190         sys_dir = opendir(tracing_events_path);
 191         if (!sys_dir)
 192                 return NULL;
 193
 194         for_each_subsystem(sys_dir, sys_dirent) {
 195
 196                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 197                          sys_dirent->d_name);
 198                 evt_dir = opendir(dir_path);
 199                 if (!evt_dir)
 200                         continue;
 201
 202                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
 203
 204                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 205                                  evt_dirent->d_name);
 206                         fd = open(evt_path, O_RDONLY);
 207                         if (fd < 0)
 208                                 continue;
 209                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 210                                 close(fd);
 211                                 continue;
 212                         }
 213                         close(fd);
 214                         id = atoll(id_buf);
 215                         if (id == config) {
 216                                 closedir(evt_dir);
 217                                 closedir(sys_dir);
 218                                 path = zalloc(sizeof(*path));
 219                                 if (!path)
 220                                         return NULL;
 221                                 path->system = malloc(MAX_EVENT_LENGTH);
 222                                 if (!path->system) {
 223                                         free(path);
 224                                         return NULL;
 225                                 }
 226                                 path->name = malloc(MAX_EVENT_LENGTH);
 227                                 if (!path->name) {
 228                                         zfree(&path->system);
 229                                         free(path);
 230                                         return NULL;
 231                                 }
 232                                 strncpy(path->system, sys_dirent->d_name,
 233                                         MAX_EVENT_LENGTH);
 234                                 strncpy(path->name, evt_dirent->d_name,
 235                                         MAX_EVENT_LENGTH);
 236                                 return path;
 237                         }
 238                 }
 239                 closedir(evt_dir);
 240         }
 241
 242         closedir(sys_dir);
 243         return NULL;
 244 }
 245
 246 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 247 {
 248         struct tracepoint_path *path = zalloc(sizeof(*path));
 249         char *str = strchr(name, ':');
 250
 251         if (path == NULL || str == NULL) {
 252                 free(path);
 253                 return NULL;
 254         }
 255
 256         path->system = strndup(name, str - name);
 257         path->name = strdup(str+1);
 258
 259         if (path->system == NULL || path->name == NULL) {
 260                 zfree(&path->system);
 261                 zfree(&path->name);
 262                 zfree(&path);
 263         }
 264
 265         return path;
 266 }
 267
 268 const char *event_type(int type)
 269 {
 270         switch (type) {
 271         case PERF_TYPE_HARDWARE:
 272                 return "hardware";
 273
 274         case PERF_TYPE_SOFTWARE:
 275                 return "software";
 276
 277         case PERF_TYPE_TRACEPOINT:
 278                 return "tracepoint";
 279
 280         case PERF_TYPE_HW_CACHE:
 281                 return "hardware-cache";
 282
 283         default:
 284                 break;
 285         }
 286
 287         return "unknown";
 288 }
 289
 290 static int parse_events__is_name_term(struct parse_events_term *term)
 291 {
 292         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 293 }
 294
 295 static char *get_config_name(struct list_head *head_terms)
 296 {
 297         struct parse_events_term *term;
 298
 299         if (!head_terms)
 300                 return NULL;
 301
 302         list_for_each_entry(term, head_terms, list)
 303                 if (parse_events__is_name_term(term))
 304                         return term->val.str;
 305
 306         return NULL;
 307 }
 308
 309 static struct perf_evsel *
 310 __add_event(struct list_head *list, int *idx,
 311             struct perf_event_attr *attr,
 312             char *name, struct cpu_map *cpus,
 313             struct list_head *config_terms, bool auto_merge_stats)
 314 {
 315         struct perf_evsel *evsel;
 316
 317         event_attr_init(attr);
 318
 319         evsel = perf_evsel__new_idx(attr, *idx);
 320         if (!evsel)
 321                 return NULL;
 322
 323         (*idx)++;
 324         evsel->cpus        = cpu_map__get(cpus);
 325         evsel->own_cpus    = cpu_map__get(cpus);
 326         evsel->system_wide = !!cpus;
 327         evsel->auto_merge_stats = auto_merge_stats;
 328
 329         if (name)
 330                 evsel->name = strdup(name);
 331
 332         if (config_terms)
 333                 list_splice(config_terms, &evsel->config_terms);
 334
 335         list_add_tail(&evsel->node, list);
 336         return evsel;
 337 }
 338
 339 static int add_event(struct list_head *list, int *idx,
 340                      struct perf_event_attr *attr, char *name,
 341                      struct list_head *config_terms)
 342 {
 343         return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
 344 }
 345
 346 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 347 {
 348         int i, j;
 349         int n, longest = -1;
 350
 351         for (i = 0; i < size; i++) {
 352                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 353                         n = strlen(names[i][j]);
 354                         if (n > longest && !strncasecmp(str, names[i][j], n))
 355                                 longest = n;
 356                 }
 357                 if (longest > 0)
 358                         return i;
 359         }
 360
 361         return -1;
 362 }
 363
 364 typedef int config_term_func_t(struct perf_event_attr *attr,
 365                                struct parse_events_term *term,
 366                                struct parse_events_error *err);
 367 static int config_term_common(struct perf_event_attr *attr,
 368                               struct parse_events_term *term,
 369                               struct parse_events_error *err);
 370 static int config_attr(struct perf_event_attr *attr,
 371                        struct list_head *head,
 372                        struct parse_events_error *err,
 373                        config_term_func_t config_term);
 374
 375 int parse_events_add_cache(struct list_head *list, int *idx,
 376                            char *type, char *op_result1, char *op_result2,
 377                            struct parse_events_error *err,
 378                            struct list_head *head_config)
 379 {
 380         struct perf_event_attr attr;
 381         LIST_HEAD(config_terms);
 382         char name[MAX_NAME_LEN], *config_name;
 383         int cache_type = -1, cache_op = -1, cache_result = -1;
 384         char *op_result[2] = { op_result1, op_result2 };
 385         int i, n;
 386
 387         /*
 388          * No fallback - if we cannot get a clear cache type
 389          * then bail out:
 390          */
 391         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 392                                    PERF_COUNT_HW_CACHE_MAX);
 393         if (cache_type == -1)
 394                 return -EINVAL;
 395
 396         config_name = get_config_name(head_config);
 397         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 398
 399         for (i = 0; (i < 2) && (op_result[i]); i++) {
 400                 char *str = op_result[i];
 401
 402                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 403
 404                 if (cache_op == -1) {
 405                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 406                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 407                         if (cache_op >= 0) {
 408                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 409                                         return -EINVAL;
 410                                 continue;
 411                         }
 412                 }
 413
 414                 if (cache_result == -1) {
 415                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 416                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 417                         if (cache_result >= 0)
 418                                 continue;
 419                 }
 420         }
 421
 422         /*
 423          * Fall back to reads:
 424          */
 425         if (cache_op == -1)
 426                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 427
 428         /*
 429          * Fall back to accesses:
 430          */
 431         if (cache_result == -1)
 432                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 433
 434         memset(&attr, 0, sizeof(attr));
 435         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 436         attr.type = PERF_TYPE_HW_CACHE;
 437
 438         if (head_config) {
 439                 if (config_attr(&attr, head_config, err,
 440                                 config_term_common))
 441                         return -EINVAL;
 442
 443                 if (get_config_terms(head_config, &config_terms))
 444                         return -ENOMEM;
 445         }
 446         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 447 }
 448
 449 static void tracepoint_error(struct parse_events_error *e, int err,
 450                              const char *sys, const char *name)
 451 {
 452         char help[BUFSIZ];
 453
 454         if (!e)
 455                 return;
 456
 457         /*
 458          * We get error directly from syscall errno ( > 0),
 459          * or from encoded pointer's error ( < 0).
 460          */
 461         err = abs(err);
 462
 463         switch (err) {
 464         case EACCES:
 465                 e->str = strdup("can't access trace events");
 466                 break;
 467         case ENOENT:
 468                 e->str = strdup("unknown tracepoint");
 469                 break;
 470         default:
 471                 e->str = strdup("failed to add tracepoint");
 472                 break;
 473         }
 474
 475         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 476         e->help = strdup(help);
 477 }
 478
 479 static int add_tracepoint(struct list_head *list, int *idx,
 480                           const char *sys_name, const char *evt_name,
 481                           struct parse_events_error *err,
 482                           struct list_head *head_config)
 483 {
 484         struct perf_evsel *evsel;
 485
 486         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 487         if (IS_ERR(evsel)) {
 488                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 489                 return PTR_ERR(evsel);
 490         }
 491
 492         if (head_config) {
 493                 LIST_HEAD(config_terms);
 494
 495                 if (get_config_terms(head_config, &config_terms))
 496                         return -ENOMEM;
 497                 list_splice(&config_terms, &evsel->config_terms);
 498         }
 499
 500         list_add_tail(&evsel->node, list);
 501         return 0;
 502 }
 503
 504 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 505                                       const char *sys_name, const char *evt_name,
 506                                       struct parse_events_error *err,
 507                                       struct list_head *head_config)
 508 {
 509         char evt_path[MAXPATHLEN];
 510         struct dirent *evt_ent;
 511         DIR *evt_dir;
 512         int ret = 0, found = 0;
 513
 514         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 515         evt_dir = opendir(evt_path);
 516         if (!evt_dir) {
 517                 tracepoint_error(err, errno, sys_name, evt_name);
 518                 return -1;
 519         }
 520
 521         while (!ret && (evt_ent = readdir(evt_dir))) {
 522                 if (!strcmp(evt_ent->d_name, ".")
 523                     || !strcmp(evt_ent->d_name, "..")
 524                     || !strcmp(evt_ent->d_name, "enable")
 525                     || !strcmp(evt_ent->d_name, "filter"))
 526                         continue;
 527
 528                 if (!strglobmatch(evt_ent->d_name, evt_name))
 529                         continue;
 530
 531                 found++;
 532
 533                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 534                                      err, head_config);
 535         }
 536
 537         if (!found) {
 538                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 539                 ret = -1;
 540         }
 541
 542         closedir(evt_dir);
 543         return ret;
 544 }
 545
 546 static int add_tracepoint_event(struct list_head *list, int *idx,
 547                                 const char *sys_name, const char *evt_name,
 548                                 struct parse_events_error *err,
 549                                 struct list_head *head_config)
 550 {
 551         return strpbrk(evt_name, "*?") ?
 552                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 553                                           err, head_config) :
 554                add_tracepoint(list, idx, sys_name, evt_name,
 555                               err, head_config);
 556 }
 557
 558 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 559                                     const char *sys_name, const char *evt_name,
 560                                     struct parse_events_error *err,
 561                                     struct list_head *head_config)
 562 {
 563         struct dirent *events_ent;
 564         DIR *events_dir;
 565         int ret = 0;
 566
 567         events_dir = opendir(tracing_events_path);
 568         if (!events_dir) {
 569                 tracepoint_error(err, errno, sys_name, evt_name);
 570                 return -1;
 571         }
 572
 573         while (!ret && (events_ent = readdir(events_dir))) {
 574                 if (!strcmp(events_ent->d_name, ".")
 575                     || !strcmp(events_ent->d_name, "..")
 576                     || !strcmp(events_ent->d_name, "enable")
 577                     || !strcmp(events_ent->d_name, "header_event")
 578                     || !strcmp(events_ent->d_name, "header_page"))
 579                         continue;
 580
 581                 if (!strglobmatch(events_ent->d_name, sys_name))
 582                         continue;
 583
 584                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 585                                            evt_name, err, head_config);
 586         }
 587
 588         closedir(events_dir);
 589         return ret;
 590 }
 591
 592 struct __add_bpf_event_param {
 593         struct parse_events_state *parse_state;
 594         struct list_head *list;
 595         struct list_head *head_config;
 596 };
 597
 598 static int add_bpf_event(const char *group, const char *event, int fd,
 599                          void *_param)
 600 {
 601         LIST_HEAD(new_evsels);
 602         struct __add_bpf_event_param *param = _param;
 603         struct parse_events_state *parse_state = param->parse_state;
 604         struct list_head *list = param->list;
 605         struct perf_evsel *pos;
 606         int err;
 607
 608         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 609                  group, event, fd);
 610
 611         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 612                                           event, parse_state->error,
 613                                           param->head_config);
 614         if (err) {
 615                 struct perf_evsel *evsel, *tmp;
 616
 617                 pr_debug("Failed to add BPF event %s:%s\n",
 618                          group, event);
 619                 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
 620                         list_del(&evsel->node);
 621                         perf_evsel__delete(evsel);
 622                 }
 623                 return err;
 624         }
 625         pr_debug("adding %s:%s\n", group, event);
 626
 627         list_for_each_entry(pos, &new_evsels, node) {
 628                 pr_debug("adding %s:%s to %p\n",
 629                          group, event, pos);
 630                 pos->bpf_fd = fd;
 631         }
 632         list_splice(&new_evsels, list);
 633         return 0;
 634 }
 635
 636 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 637                               struct list_head *list,
 638                               struct bpf_object *obj,
 639                               struct list_head *head_config)
 640 {
 641         int err;
 642         char errbuf[BUFSIZ];
 643         struct __add_bpf_event_param param = {parse_state, list, head_config};
 644         static bool registered_unprobe_atexit = false;
 645
 646         if (IS_ERR(obj) || !obj) {
 647                 snprintf(errbuf, sizeof(errbuf),
 648                          "Internal error: load bpf obj with NULL");
 649                 err = -EINVAL;
 650                 goto errout;
 651         }
 652
 653         /*
 654          * Register atexit handler before calling bpf__probe() so
 655          * bpf__probe() don't need to unprobe probe points its already
 656          * created when failure.
 657          */
 658         if (!registered_unprobe_atexit) {
 659                 atexit(bpf__clear);
 660                 registered_unprobe_atexit = true;
 661         }
 662
 663         err = bpf__probe(obj);
 664         if (err) {
 665                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 666                 goto errout;
 667         }
 668
 669         err = bpf__load(obj);
 670         if (err) {
 671                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 672                 goto errout;
 673         }
 674
 675         err = bpf__foreach_event(obj, add_bpf_event, &param);
 676         if (err) {
 677                 snprintf(errbuf, sizeof(errbuf),
 678                          "Attach events in BPF object failed");
 679                 goto errout;
 680         }
 681
 682         return 0;
 683 errout:
 684         parse_state->error->help = strdup("(add -v to see detail)");
 685         parse_state->error->str = strdup(errbuf);
 686         return err;
 687 }
 688
 689 static int
 690 parse_events_config_bpf(struct parse_events_state *parse_state,
 691                         struct bpf_object *obj,
 692                         struct list_head *head_config)
 693 {
 694         struct parse_events_term *term;
 695         int error_pos;
 696
 697         if (!head_config || list_empty(head_config))
 698                 return 0;
 699
 700         list_for_each_entry(term, head_config, list) {
 701                 char errbuf[BUFSIZ];
 702                 int err;
 703
 704                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 705                         snprintf(errbuf, sizeof(errbuf),
 706                                  "Invalid config term for BPF object");
 707                         errbuf[BUFSIZ - 1] = '\0';
 708
 709                         parse_state->error->idx = term->err_term;
 710                         parse_state->error->str = strdup(errbuf);
 711                         return -EINVAL;
 712                 }
 713
 714                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 715                 if (err) {
 716                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 717                                                  &error_pos, err, errbuf,
 718                                                  sizeof(errbuf));
 719                         parse_state->error->help = strdup(
 720 "Hint:\tValid config terms:\n"
 721 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 722 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 723 "\n"
 724 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 725 "     \t(add -v to see detail)");
 726                         parse_state->error->str = strdup(errbuf);
 727                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 728                                 parse_state->error->idx = term->err_val;
 729                         else
 730                                 parse_state->error->idx = term->err_term + error_pos;
 731                         return err;
 732                 }
 733         }
 734         return 0;
 735 }
 736
 737 /*
 738  * Split config terms:
 739  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 740  *  'call-graph=fp' is 'evt config', should be applied to each
 741  *  events in bpf.c.
 742  * 'map:array.value[0]=1' is 'obj config', should be processed
 743  * with parse_events_config_bpf.
 744  *
 745  * Move object config terms from the first list to obj_head_config.
 746  */
 747 static void
 748 split_bpf_config_terms(struct list_head *evt_head_config,
 749                        struct list_head *obj_head_config)
 750 {
 751         struct parse_events_term *term, *temp;
 752
 753         /*
 754          * Currectly, all possible user config term
 755          * belong to bpf object. parse_events__is_hardcoded_term()
 756          * happends to be a good flag.
 757          *
 758          * See parse_events_config_bpf() and
 759          * config_term_tracepoint().
 760          */
 761         list_for_each_entry_safe(term, temp, evt_head_config, list)
 762                 if (!parse_events__is_hardcoded_term(term))
 763                         list_move_tail(&term->list, obj_head_config);
 764 }
 765
 766 int parse_events_load_bpf(struct parse_events_state *parse_state,
 767                           struct list_head *list,
 768                           char *bpf_file_name,
 769                           bool source,
 770                           struct list_head *head_config)
 771 {
 772         int err;
 773         struct bpf_object *obj;
 774         LIST_HEAD(obj_head_config);
 775
 776         if (head_config)
 777                 split_bpf_config_terms(head_config, &obj_head_config);
 778
 779         obj = bpf__prepare_load(bpf_file_name, source);
 780         if (IS_ERR(obj)) {
 781                 char errbuf[BUFSIZ];
 782
 783                 err = PTR_ERR(obj);
 784
 785                 if (err == -ENOTSUP)
 786                         snprintf(errbuf, sizeof(errbuf),
 787                                  "BPF support is not compiled");
 788                 else
 789                         bpf__strerror_prepare_load(bpf_file_name,
 790                                                    source,
 791                                                    -err, errbuf,
 792                                                    sizeof(errbuf));
 793
 794                 parse_state->error->help = strdup("(add -v to see detail)");
 795                 parse_state->error->str = strdup(errbuf);
 796                 return err;
 797         }
 798
 799         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 800         if (err)
 801                 return err;
 802         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 803
 804         /*
 805          * Caller doesn't know anything about obj_head_config,
 806          * so combine them together again before returnning.
 807          */
 808         if (head_config)
 809                 list_splice_tail(&obj_head_config, head_config);
 810         return err;
 811 }
 812
 813 static int
 814 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 815 {
 816         int i;
 817
 818         for (i = 0; i < 3; i++) {
 819                 if (!type || !type[i])
 820                         break;
 821
 822 #define CHECK_SET_TYPE(bit)             \
 823 do {                                    \
 824         if (attr->bp_type & bit)        \
 825                 return -EINVAL;         \
 826         else                            \
 827                 attr->bp_type |= bit;   \
 828 } while (0)
 829
 830                 switch (type[i]) {
 831                 case 'r':
 832                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 833                         break;
 834                 case 'w':
 835                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 836                         break;
 837                 case 'x':
 838                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 839                         break;
 840                 default:
 841                         return -EINVAL;
 842                 }
 843         }
 844
 845 #undef CHECK_SET_TYPE
 846
 847         if (!attr->bp_type) /* Default */
 848                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 849
 850         return 0;
 851 }
 852
 853 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 854                                 void *ptr, char *type, u64 len)
 855 {
 856         struct perf_event_attr attr;
 857
 858         memset(&attr, 0, sizeof(attr));
 859         attr.bp_addr = (unsigned long) ptr;
 860
 861         if (parse_breakpoint_type(type, &attr))
 862                 return -EINVAL;
 863
 864         /* Provide some defaults if len is not specified */
 865         if (!len) {
 866                 if (attr.bp_type == HW_BREAKPOINT_X)
 867                         len = sizeof(long);
 868                 else
 869                         len = HW_BREAKPOINT_LEN_4;
 870         }
 871
 872         attr.bp_len = len;
 873
 874         attr.type = PERF_TYPE_BREAKPOINT;
 875         attr.sample_period = 1;
 876
 877         return add_event(list, idx, &attr, NULL, NULL);
 878 }
 879
 880 static int check_type_val(struct parse_events_term *term,
 881                           struct parse_events_error *err,
 882                           int type)
 883 {
 884         if (type == term->type_val)
 885                 return 0;
 886
 887         if (err) {
 888                 err->idx = term->err_val;
 889                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 890                         err->str = strdup("expected numeric value");
 891                 else
 892                         err->str = strdup("expected string value");
 893         }
 894         return -EINVAL;
 895 }
 896
 897 /*
 898  * Update according to parse-events.l
 899  */
 900 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 901         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 902         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 903         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 904         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 905         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 906         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 907         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 908         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 909         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 910         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 911         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 912         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 913         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 914         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 915         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 916         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 917         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 918 };
 919
 920 static bool config_term_shrinked;
 921
 922 static bool
 923 config_term_avail(int term_type, struct parse_events_error *err)
 924 {
 925         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 926                 err->str = strdup("Invalid term_type");
 927                 return false;
 928         }
 929         if (!config_term_shrinked)
 930                 return true;
 931
 932         switch (term_type) {
 933         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 934         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 935         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 936         case PARSE_EVENTS__TERM_TYPE_NAME:
 937         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 938                 return true;
 939         default:
 940                 if (!err)
 941                         return false;
 942
 943                 /* term_type is validated so indexing is safe */
 944                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 945                              config_term_names[term_type]) < 0)
 946                         err->str = NULL;
 947                 return false;
 948         }
 949 }
 950
 951 void parse_events__shrink_config_terms(void)
 952 {
 953         config_term_shrinked = true;
 954 }
 955
 956 static int config_term_common(struct perf_event_attr *attr,
 957                               struct parse_events_term *term,
 958                               struct parse_events_error *err)
 959 {
 960 #define CHECK_TYPE_VAL(type)                                               \
 961 do {                                                                       \
 962         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 963                 return -EINVAL;                                            \
 964 } while (0)
 965
 966         switch (term->type_term) {
 967         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 968                 CHECK_TYPE_VAL(NUM);
 969                 attr->config = term->val.num;
 970                 break;
 971         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 972                 CHECK_TYPE_VAL(NUM);
 973                 attr->config1 = term->val.num;
 974                 break;
 975         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 976                 CHECK_TYPE_VAL(NUM);
 977                 attr->config2 = term->val.num;
 978                 break;
 979         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 980                 CHECK_TYPE_VAL(NUM);
 981                 break;
 982         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 983                 CHECK_TYPE_VAL(NUM);
 984                 break;
 985         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 986                 CHECK_TYPE_VAL(STR);
 987                 if (strcmp(term->val.str, "no") &&
 988                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
 989                         err->str = strdup("invalid branch sample type");
 990                         err->idx = term->err_val;
 991                         return -EINVAL;
 992                 }
 993                 break;
 994         case PARSE_EVENTS__TERM_TYPE_TIME:
 995                 CHECK_TYPE_VAL(NUM);
 996                 if (term->val.num > 1) {
 997                         err->str = strdup("expected 0 or 1");
 998                         err->idx = term->err_val;
 999                         return -EINVAL;
1000                 }
1001                 break;
1002         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1003                 CHECK_TYPE_VAL(STR);
1004                 break;
1005         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1006                 CHECK_TYPE_VAL(NUM);
1007                 break;
1008         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1009                 CHECK_TYPE_VAL(NUM);
1010                 break;
1011         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1012                 CHECK_TYPE_VAL(NUM);
1013                 break;
1014         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1015                 CHECK_TYPE_VAL(NUM);
1016                 break;
1017         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1018                 CHECK_TYPE_VAL(NUM);
1019                 break;
1020         case PARSE_EVENTS__TERM_TYPE_NAME:
1021                 CHECK_TYPE_VAL(STR);
1022                 break;
1023         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1024                 CHECK_TYPE_VAL(NUM);
1025                 break;
1026         default:
1027                 err->str = strdup("unknown term");
1028                 err->idx = term->err_term;
1029                 err->help = parse_events_formats_error_string(NULL);
1030                 return -EINVAL;
1031         }
1032
1033         /*
1034          * Check term availbility after basic checking so
1035          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1036          *
1037          * If check availbility at the entry of this function,
1038          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1039          * if an invalid config term is provided for legacy events
1040          * (for example, instructions/badterm/...), which is confusing.
1041          */
1042         if (!config_term_avail(term->type_term, err))
1043                 return -EINVAL;
1044         return 0;
1045 #undef CHECK_TYPE_VAL
1046 }
1047
1048 static int config_term_pmu(struct perf_event_attr *attr,
1049                            struct parse_events_term *term,
1050                            struct parse_events_error *err)
1051 {
1052         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1053             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1054                 /*
1055                  * Always succeed for sysfs terms, as we dont know
1056                  * at this point what type they need to have.
1057                  */
1058                 return 0;
1059         else
1060                 return config_term_common(attr, term, err);
1061 }
1062
1063 static int config_term_tracepoint(struct perf_event_attr *attr,
1064                                   struct parse_events_term *term,
1065                                   struct parse_events_error *err)
1066 {
1067         switch (term->type_term) {
1068         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1069         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1070         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1071         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1072         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1073         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1074         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1075                 return config_term_common(attr, term, err);
1076         default:
1077                 if (err) {
1078                         err->idx = term->err_term;
1079                         err->str = strdup("unknown term");
1080                         err->help = strdup("valid terms: call-graph,stack-size\n");
1081                 }
1082                 return -EINVAL;
1083         }
1084
1085         return 0;
1086 }
1087
1088 static int config_attr(struct perf_event_attr *attr,
1089                        struct list_head *head,
1090                        struct parse_events_error *err,
1091                        config_term_func_t config_term)
1092 {
1093         struct parse_events_term *term;
1094
1095         list_for_each_entry(term, head, list)
1096                 if (config_term(attr, term, err))
1097                         return -EINVAL;
1098
1099         return 0;
1100 }
1101
1102 static int get_config_terms(struct list_head *head_config,
1103                             struct list_head *head_terms __maybe_unused)
1104 {
1105 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1106 do {                                                            \
1107         struct perf_evsel_config_term *__t;                     \
1108                                                                 \
1109         __t = zalloc(sizeof(*__t));                             \
1110         if (!__t)                                               \
1111                 return -ENOMEM;                                 \
1112                                                                 \
1113         INIT_LIST_HEAD(&__t->list);                             \
1114         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1115         __t->val.__name = __val;                                \
1116         list_add_tail(&__t->list, head_terms);                  \
1117 } while (0)
1118
1119         struct parse_events_term *term;
1120
1121         list_for_each_entry(term, head_config, list) {
1122                 switch (term->type_term) {
1123                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1124                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1125                         break;
1126                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1127                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1128                         break;
1129                 case PARSE_EVENTS__TERM_TYPE_TIME:
1130                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1131                         break;
1132                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1133                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1134                         break;
1135                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1136                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1137                         break;
1138                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1139                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1140                         break;
1141                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1142                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1143                         break;
1144                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1145                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1146                         break;
1147                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1148                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1149                         break;
1150                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1151                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1152                         break;
1153                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1154                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1155                         break;
1156                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1157                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1158                         break;
1159                 default:
1160                         break;
1161                 }
1162         }
1163 #undef ADD_EVSEL_CONFIG
1164         return 0;
1165 }
1166
1167 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1168                                 const char *sys, const char *event,
1169                                 struct parse_events_error *err,
1170                                 struct list_head *head_config)
1171 {
1172         if (head_config) {
1173                 struct perf_event_attr attr;
1174
1175                 if (config_attr(&attr, head_config, err,
1176                                 config_term_tracepoint))
1177                         return -EINVAL;
1178         }
1179
1180         if (strpbrk(sys, "*?"))
1181                 return add_tracepoint_multi_sys(list, idx, sys, event,
1182                                                 err, head_config);
1183         else
1184                 return add_tracepoint_event(list, idx, sys, event,
1185                                             err, head_config);
1186 }
1187
1188 int parse_events_add_numeric(struct parse_events_state *parse_state,
1189                              struct list_head *list,
1190                              u32 type, u64 config,
1191                              struct list_head *head_config)
1192 {
1193         struct perf_event_attr attr;
1194         LIST_HEAD(config_terms);
1195
1196         memset(&attr, 0, sizeof(attr));
1197         attr.type = type;
1198         attr.config = config;
1199
1200         if (head_config) {
1201                 if (config_attr(&attr, head_config, parse_state->error,
1202                                 config_term_common))
1203                         return -EINVAL;
1204
1205                 if (get_config_terms(head_config, &config_terms))
1206                         return -ENOMEM;
1207         }
1208
1209         return add_event(list, &parse_state->idx, &attr,
1210                          get_config_name(head_config), &config_terms);
1211 }
1212
1213 static int __parse_events_add_pmu(struct parse_events_state *parse_state,
1214                          struct list_head *list, char *name,
1215                          struct list_head *head_config, bool auto_merge_stats)
1216 {
1217         struct perf_event_attr attr;
1218         struct perf_pmu_info info;
1219         struct perf_pmu *pmu;
1220         struct perf_evsel *evsel;
1221         LIST_HEAD(config_terms);
1222
1223         pmu = perf_pmu__find(name);
1224         if (!pmu)
1225                 return -EINVAL;
1226
1227         if (pmu->default_config) {
1228                 memcpy(&attr, pmu->default_config,
1229                        sizeof(struct perf_event_attr));
1230         } else {
1231                 memset(&attr, 0, sizeof(attr));
1232         }
1233
1234         if (!head_config) {
1235                 attr.type = pmu->type;
1236                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu->cpus, NULL, auto_merge_stats);
1237                 return evsel ? 0 : -ENOMEM;
1238         }
1239
1240         if (perf_pmu__check_alias(pmu, head_config, &info))
1241                 return -EINVAL;
1242
1243         /*
1244          * Configure hardcoded terms first, no need to check
1245          * return value when called with fail == 0 ;)
1246          */
1247         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1248                 return -EINVAL;
1249
1250         if (get_config_terms(head_config, &config_terms))
1251                 return -ENOMEM;
1252
1253         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1254                 return -EINVAL;
1255
1256         evsel = __add_event(list, &parse_state->idx, &attr,
1257                             get_config_name(head_config), pmu->cpus,
1258                             &config_terms, auto_merge_stats);
1259         if (evsel) {
1260                 evsel->unit = info.unit;
1261                 evsel->scale = info.scale;
1262                 evsel->per_pkg = info.per_pkg;
1263                 evsel->snapshot = info.snapshot;
1264                 evsel->metric_expr = info.metric_expr;
1265                 evsel->metric_name = info.metric_name;
1266         }
1267
1268         return evsel ? 0 : -ENOMEM;
1269 }
1270
1271 int parse_events_add_pmu(struct parse_events_state *parse_state,
1272                          struct list_head *list, char *name,
1273                          struct list_head *head_config)
1274 {
1275         return __parse_events_add_pmu(parse_state, list, name, head_config, false);
1276 }
1277
1278 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1279                                char *str, struct list_head **listp)
1280 {
1281         struct list_head *head;
1282         struct parse_events_term *term;
1283         struct list_head *list;
1284         struct perf_pmu *pmu = NULL;
1285         int ok = 0;
1286
1287         *listp = NULL;
1288         /* Add it for all PMUs that support the alias */
1289         list = malloc(sizeof(struct list_head));
1290         if (!list)
1291                 return -1;
1292         INIT_LIST_HEAD(list);
1293         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1294                 struct perf_pmu_alias *alias;
1295
1296                 list_for_each_entry(alias, &pmu->aliases, list) {
1297                         if (!strcasecmp(alias->name, str)) {
1298                                 head = malloc(sizeof(struct list_head));
1299                                 if (!head)
1300                                         return -1;
1301                                 INIT_LIST_HEAD(head);
1302                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1303                                                            str, 1, false, &str, NULL) < 0)
1304                                         return -1;
1305                                 list_add_tail(&term->list, head);
1306
1307                                 if (!__parse_events_add_pmu(parse_state, list,
1308                                                             pmu->name, head, true)) {
1309                                         pr_debug("%s -> %s/%s/\n", str,
1310                                                  pmu->name, alias->str);
1311                                         ok++;
1312                                 }
1313
1314                                 parse_events_terms__delete(head);
1315                         }
1316                 }
1317         }
1318         if (!ok)
1319                 return -1;
1320         *listp = list;
1321         return 0;
1322 }
1323
1324 int parse_events__modifier_group(struct list_head *list,
1325                                  char *event_mod)
1326 {
1327         return parse_events__modifier_event(list, event_mod, true);
1328 }
1329
1330 void parse_events__set_leader(char *name, struct list_head *list)
1331 {
1332         struct perf_evsel *leader;
1333
1334         if (list_empty(list)) {
1335                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1336                 return;
1337         }
1338
1339         __perf_evlist__set_leader(list);
1340         leader = list_entry(list->next, struct perf_evsel, node);
1341         leader->group_name = name ? strdup(name) : NULL;
1342 }
1343
1344 /* list_event is assumed to point to malloc'ed memory */
1345 void parse_events_update_lists(struct list_head *list_event,
1346                                struct list_head *list_all)
1347 {
1348         /*
1349          * Called for single event definition. Update the
1350          * 'all event' list, and reinit the 'single event'
1351          * list, for next event definition.
1352          */
1353         list_splice_tail(list_event, list_all);
1354         free(list_event);
1355 }
1356
1357 struct event_modifier {
1358         int eu;
1359         int ek;
1360         int eh;
1361         int eH;
1362         int eG;
1363         int eI;
1364         int precise;
1365         int precise_max;
1366         int exclude_GH;
1367         int sample_read;
1368         int pinned;
1369 };
1370
1371 static int get_event_modifier(struct event_modifier *mod, char *str,
1372                                struct perf_evsel *evsel)
1373 {
1374         int eu = evsel ? evsel->attr.exclude_user : 0;
1375         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1376         int eh = evsel ? evsel->attr.exclude_hv : 0;
1377         int eH = evsel ? evsel->attr.exclude_host : 0;
1378         int eG = evsel ? evsel->attr.exclude_guest : 0;
1379         int eI = evsel ? evsel->attr.exclude_idle : 0;
1380         int precise = evsel ? evsel->attr.precise_ip : 0;
1381         int precise_max = 0;
1382         int sample_read = 0;
1383         int pinned = evsel ? evsel->attr.pinned : 0;
1384
1385         int exclude = eu | ek | eh;
1386         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1387
1388         memset(mod, 0, sizeof(*mod));
1389
1390         while (*str) {
1391                 if (*str == 'u') {
1392                         if (!exclude)
1393                                 exclude = eu = ek = eh = 1;
1394                         eu = 0;
1395                 } else if (*str == 'k') {
1396                         if (!exclude)
1397                                 exclude = eu = ek = eh = 1;
1398                         ek = 0;
1399                 } else if (*str == 'h') {
1400                         if (!exclude)
1401                                 exclude = eu = ek = eh = 1;
1402                         eh = 0;
1403                 } else if (*str == 'G') {
1404                         if (!exclude_GH)
1405                                 exclude_GH = eG = eH = 1;
1406                         eG = 0;
1407                 } else if (*str == 'H') {
1408                         if (!exclude_GH)
1409                                 exclude_GH = eG = eH = 1;
1410                         eH = 0;
1411                 } else if (*str == 'I') {
1412                         eI = 1;
1413                 } else if (*str == 'p') {
1414                         precise++;
1415                         /* use of precise requires exclude_guest */
1416                         if (!exclude_GH)
1417                                 eG = 1;
1418                 } else if (*str == 'P') {
1419                         precise_max = 1;
1420                 } else if (*str == 'S') {
1421                         sample_read = 1;
1422                 } else if (*str == 'D') {
1423                         pinned = 1;
1424                 } else
1425                         break;
1426
1427                 ++str;
1428         }
1429
1430         /*
1431          * precise ip:
1432          *
1433          *  0 - SAMPLE_IP can have arbitrary skid
1434          *  1 - SAMPLE_IP must have constant skid
1435          *  2 - SAMPLE_IP requested to have 0 skid
1436          *  3 - SAMPLE_IP must have 0 skid
1437          *
1438          *  See also PERF_RECORD_MISC_EXACT_IP
1439          */
1440         if (precise > 3)
1441                 return -EINVAL;
1442
1443         mod->eu = eu;
1444         mod->ek = ek;
1445         mod->eh = eh;
1446         mod->eH = eH;
1447         mod->eG = eG;
1448         mod->eI = eI;
1449         mod->precise = precise;
1450         mod->precise_max = precise_max;
1451         mod->exclude_GH = exclude_GH;
1452         mod->sample_read = sample_read;
1453         mod->pinned = pinned;
1454
1455         return 0;
1456 }
1457
1458 /*
1459  * Basic modifier sanity check to validate it contains only one
1460  * instance of any modifier (apart from 'p') present.
1461  */
1462 static int check_modifier(char *str)
1463 {
1464         char *p = str;
1465
1466         /* The sizeof includes 0 byte as well. */
1467         if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1468                 return -1;
1469
1470         while (*p) {
1471                 if (*p != 'p' && strchr(p + 1, *p))
1472                         return -1;
1473                 p++;
1474         }
1475
1476         return 0;
1477 }
1478
1479 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1480 {
1481         struct perf_evsel *evsel;
1482         struct event_modifier mod;
1483
1484         if (str == NULL)
1485                 return 0;
1486
1487         if (check_modifier(str))
1488                 return -EINVAL;
1489
1490         if (!add && get_event_modifier(&mod, str, NULL))
1491                 return -EINVAL;
1492
1493         __evlist__for_each_entry(list, evsel) {
1494                 if (add && get_event_modifier(&mod, str, evsel))
1495                         return -EINVAL;
1496
1497                 evsel->attr.exclude_user   = mod.eu;
1498                 evsel->attr.exclude_kernel = mod.ek;
1499                 evsel->attr.exclude_hv     = mod.eh;
1500                 evsel->attr.precise_ip     = mod.precise;
1501                 evsel->attr.exclude_host   = mod.eH;
1502                 evsel->attr.exclude_guest  = mod.eG;
1503                 evsel->attr.exclude_idle   = mod.eI;
1504                 evsel->exclude_GH          = mod.exclude_GH;
1505                 evsel->sample_read         = mod.sample_read;
1506                 evsel->precise_max         = mod.precise_max;
1507
1508                 if (perf_evsel__is_group_leader(evsel))
1509                         evsel->attr.pinned = mod.pinned;
1510         }
1511
1512         return 0;
1513 }
1514
1515 int parse_events_name(struct list_head *list, char *name)
1516 {
1517         struct perf_evsel *evsel;
1518
1519         __evlist__for_each_entry(list, evsel) {
1520                 if (!evsel->name)
1521                         evsel->name = strdup(name);
1522         }
1523
1524         return 0;
1525 }
1526
1527 static int
1528 comp_pmu(const void *p1, const void *p2)
1529 {
1530         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1531         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1532
1533         return strcasecmp(pmu1->symbol, pmu2->symbol);
1534 }
1535
1536 static void perf_pmu__parse_cleanup(void)
1537 {
1538         if (perf_pmu_events_list_num > 0) {
1539                 struct perf_pmu_event_symbol *p;
1540                 int i;
1541
1542                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1543                         p = perf_pmu_events_list + i;
1544                         zfree(&p->symbol);
1545                 }
1546                 zfree(&perf_pmu_events_list);
1547                 perf_pmu_events_list_num = 0;
1548         }
1549 }
1550
1551 #define SET_SYMBOL(str, stype)          \
1552 do {                                    \
1553         p->symbol = str;                \
1554         if (!p->symbol)                 \
1555                 goto err;               \
1556         p->type = stype;                \
1557 } while (0)
1558
1559 /*
1560  * Read the pmu events list from sysfs
1561  * Save it into perf_pmu_events_list
1562  */
1563 static void perf_pmu__parse_init(void)
1564 {
1565
1566         struct perf_pmu *pmu = NULL;
1567         struct perf_pmu_alias *alias;
1568         int len = 0;
1569
1570         pmu = NULL;
1571         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1572                 list_for_each_entry(alias, &pmu->aliases, list) {
1573                         if (strchr(alias->name, '-'))
1574                                 len++;
1575                         len++;
1576                 }
1577         }
1578
1579         if (len == 0) {
1580                 perf_pmu_events_list_num = -1;
1581                 return;
1582         }
1583         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1584         if (!perf_pmu_events_list)
1585                 return;
1586         perf_pmu_events_list_num = len;
1587
1588         len = 0;
1589         pmu = NULL;
1590         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1591                 list_for_each_entry(alias, &pmu->aliases, list) {
1592                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1593                         char *tmp = strchr(alias->name, '-');
1594
1595                         if (tmp != NULL) {
1596                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1597                                                 PMU_EVENT_SYMBOL_PREFIX);
1598                                 p++;
1599                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1600                                 len += 2;
1601                         } else {
1602                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1603                                 len++;
1604                         }
1605                 }
1606         }
1607         qsort(perf_pmu_events_list, len,
1608                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1609
1610         return;
1611 err:
1612         perf_pmu__parse_cleanup();
1613 }
1614
1615 enum perf_pmu_event_symbol_type
1616 perf_pmu__parse_check(const char *name)
1617 {
1618         struct perf_pmu_event_symbol p, *r;
1619
1620         /* scan kernel pmu events from sysfs if needed */
1621         if (perf_pmu_events_list_num == 0)
1622                 perf_pmu__parse_init();
1623         /*
1624          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1625          * cpu-cycles has been handled by hardcode.
1626          * So it must be cpu// events, not kernel pmu event.
1627          */
1628         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1629                 return PMU_EVENT_SYMBOL_ERR;
1630
1631         p.symbol = strdup(name);
1632         r = bsearch(&p, perf_pmu_events_list,
1633                         (size_t) perf_pmu_events_list_num,
1634                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1635         zfree(&p.symbol);
1636         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1637 }
1638
1639 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1640 {
1641         YY_BUFFER_STATE buffer;
1642         void *scanner;
1643         int ret;
1644
1645         ret = parse_events_lex_init_extra(start_token, &scanner);
1646         if (ret)
1647                 return ret;
1648
1649         buffer = parse_events__scan_string(str, scanner);
1650
1651 #ifdef PARSER_DEBUG
1652         parse_events_debug = 1;
1653 #endif
1654         ret = parse_events_parse(parse_state, scanner);
1655
1656         parse_events__flush_buffer(buffer, scanner);
1657         parse_events__delete_buffer(buffer, scanner);
1658         parse_events_lex_destroy(scanner);
1659         return ret;
1660 }
1661
1662 /*
1663  * parse event config string, return a list of event terms.
1664  */
1665 int parse_events_terms(struct list_head *terms, const char *str)
1666 {
1667         struct parse_events_state parse_state = {
1668                 .terms = NULL,
1669         };
1670         int ret;
1671
1672         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1673         if (!ret) {
1674                 list_splice(parse_state.terms, terms);
1675                 zfree(&parse_state.terms);
1676                 return 0;
1677         }
1678
1679         parse_events_terms__delete(parse_state.terms);
1680         return ret;
1681 }
1682
1683 int parse_events(struct perf_evlist *evlist, const char *str,
1684                  struct parse_events_error *err)
1685 {
1686         struct parse_events_state parse_state = {
1687                 .list   = LIST_HEAD_INIT(parse_state.list),
1688                 .idx    = evlist->nr_entries,
1689                 .error  = err,
1690                 .evlist = evlist,
1691         };
1692         int ret;
1693
1694         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1695         perf_pmu__parse_cleanup();
1696         if (!ret) {
1697                 struct perf_evsel *last;
1698
1699                 if (list_empty(&parse_state.list)) {
1700                         WARN_ONCE(true, "WARNING: event parser found nothing");
1701                         return -1;
1702                 }
1703
1704                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1705                 evlist->nr_groups += parse_state.nr_groups;
1706                 last = perf_evlist__last(evlist);
1707                 last->cmdline_group_boundary = true;
1708
1709                 return 0;
1710         }
1711
1712         /*
1713          * There are 2 users - builtin-record and builtin-test objects.
1714          * Both call perf_evlist__delete in case of error, so we dont
1715          * need to bother.
1716          */
1717         return ret;
1718 }
1719
1720 #define MAX_WIDTH 1000
1721 static int get_term_width(void)
1722 {
1723         struct winsize ws;
1724
1725         get_term_dimensions(&ws);
1726         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1727 }
1728
1729 static void parse_events_print_error(struct parse_events_error *err,
1730                                      const char *event)
1731 {
1732         const char *str = "invalid or unsupported event: ";
1733         char _buf[MAX_WIDTH];
1734         char *buf = (char *) event;
1735         int idx = 0;
1736
1737         if (err->str) {
1738                 /* -2 for extra '' in the final fprintf */
1739                 int width       = get_term_width() - 2;
1740                 int len_event   = strlen(event);
1741                 int len_str, max_len, cut = 0;
1742
1743                 /*
1744                  * Maximum error index indent, we will cut
1745                  * the event string if it's bigger.
1746                  */
1747                 int max_err_idx = 13;
1748
1749                 /*
1750                  * Let's be specific with the message when
1751                  * we have the precise error.
1752                  */
1753                 str     = "event syntax error: ";
1754                 len_str = strlen(str);
1755                 max_len = width - len_str;
1756
1757                 buf = _buf;
1758
1759                 /* We're cutting from the beginning. */
1760                 if (err->idx > max_err_idx)
1761                         cut = err->idx - max_err_idx;
1762
1763                 strncpy(buf, event + cut, max_len);
1764
1765                 /* Mark cut parts with '..' on both sides. */
1766                 if (cut)
1767                         buf[0] = buf[1] = '.';
1768
1769                 if ((len_event - cut) > max_len) {
1770                         buf[max_len - 1] = buf[max_len - 2] = '.';
1771                         buf[max_len] = 0;
1772                 }
1773
1774                 idx = len_str + err->idx - cut;
1775         }
1776
1777         fprintf(stderr, "%s'%s'\n", str, buf);
1778         if (idx) {
1779                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1780                 if (err->help)
1781                         fprintf(stderr, "\n%s\n", err->help);
1782                 zfree(&err->str);
1783                 zfree(&err->help);
1784         }
1785
1786         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1787 }
1788
1789 #undef MAX_WIDTH
1790
1791 int parse_events_option(const struct option *opt, const char *str,
1792                         int unset __maybe_unused)
1793 {
1794         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1795         struct parse_events_error err = { .idx = 0, };
1796         int ret = parse_events(evlist, str, &err);
1797
1798         if (ret)
1799                 parse_events_print_error(&err, str);
1800
1801         return ret;
1802 }
1803
1804 static int
1805 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1806                            int (*func)(struct perf_evsel *evsel,
1807                                        const void *arg),
1808                            const void *arg)
1809 {
1810         struct perf_evsel *last = NULL;
1811         int err;
1812
1813         /*
1814          * Don't return when list_empty, give func a chance to report
1815          * error when it found last == NULL.
1816          *
1817          * So no need to WARN here, let *func do this.
1818          */
1819         if (evlist->nr_entries > 0)
1820                 last = perf_evlist__last(evlist);
1821
1822         do {
1823                 err = (*func)(last, arg);
1824                 if (err)
1825                         return -1;
1826                 if (!last)
1827                         return 0;
1828
1829                 if (last->node.prev == &evlist->entries)
1830                         return 0;
1831                 last = list_entry(last->node.prev, struct perf_evsel, node);
1832         } while (!last->cmdline_group_boundary);
1833
1834         return 0;
1835 }
1836
1837 static int set_filter(struct perf_evsel *evsel, const void *arg)
1838 {
1839         const char *str = arg;
1840         bool found = false;
1841         int nr_addr_filters = 0;
1842         struct perf_pmu *pmu = NULL;
1843
1844         if (evsel == NULL)
1845                 goto err;
1846
1847         if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1848                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1849                         fprintf(stderr,
1850                                 "not enough memory to hold filter string\n");
1851                         return -1;
1852                 }
1853
1854                 return 0;
1855         }
1856
1857         while ((pmu = perf_pmu__scan(pmu)) != NULL)
1858                 if (pmu->type == evsel->attr.type) {
1859                         found = true;
1860                         break;
1861                 }
1862
1863         if (found)
1864                 perf_pmu__scan_file(pmu, "nr_addr_filters",
1865                                     "%d", &nr_addr_filters);
1866
1867         if (!nr_addr_filters)
1868                 goto err;
1869
1870         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1871                 fprintf(stderr,
1872                         "not enough memory to hold filter string\n");
1873                 return -1;
1874         }
1875
1876         return 0;
1877
1878 err:
1879         fprintf(stderr,
1880                 "--filter option should follow a -e tracepoint or HW tracer option\n");
1881
1882         return -1;
1883 }
1884
1885 int parse_filter(const struct option *opt, const char *str,
1886                  int unset __maybe_unused)
1887 {
1888         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1889
1890         return foreach_evsel_in_last_glob(evlist, set_filter,
1891                                           (const void *)str);
1892 }
1893
1894 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1895                                    const void *arg __maybe_unused)
1896 {
1897         char new_filter[64];
1898
1899         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1900                 fprintf(stderr,
1901                         "--exclude-perf option should follow a -e tracepoint option\n");
1902                 return -1;
1903         }
1904
1905         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1906
1907         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1908                 fprintf(stderr,
1909                         "not enough memory to hold filter string\n");
1910                 return -1;
1911         }
1912
1913         return 0;
1914 }
1915
1916 int exclude_perf(const struct option *opt,
1917                  const char *arg __maybe_unused,
1918                  int unset __maybe_unused)
1919 {
1920         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1921
1922         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1923                                           NULL);
1924 }
1925
1926 static const char * const event_type_descriptors[] = {
1927         "Hardware event",
1928         "Software event",
1929         "Tracepoint event",
1930         "Hardware cache event",
1931         "Raw hardware event descriptor",
1932         "Hardware breakpoint",
1933 };
1934
1935 static int cmp_string(const void *a, const void *b)
1936 {
1937         const char * const *as = a;
1938         const char * const *bs = b;
1939
1940         return strcmp(*as, *bs);
1941 }
1942
1943 /*
1944  * Print the events from <debugfs_mount_point>/tracing/events
1945  */
1946
1947 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1948                              bool name_only)
1949 {
1950         DIR *sys_dir, *evt_dir;
1951         struct dirent *sys_dirent, *evt_dirent;
1952         char evt_path[MAXPATHLEN];
1953         char dir_path[MAXPATHLEN];
1954         char **evt_list = NULL;
1955         unsigned int evt_i = 0, evt_num = 0;
1956         bool evt_num_known = false;
1957
1958 restart:
1959         sys_dir = opendir(tracing_events_path);
1960         if (!sys_dir)
1961                 return;
1962
1963         if (evt_num_known) {
1964                 evt_list = zalloc(sizeof(char *) * evt_num);
1965                 if (!evt_list)
1966                         goto out_close_sys_dir;
1967         }
1968
1969         for_each_subsystem(sys_dir, sys_dirent) {
1970                 if (subsys_glob != NULL &&
1971                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1972                         continue;
1973
1974                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1975                          sys_dirent->d_name);
1976                 evt_dir = opendir(dir_path);
1977                 if (!evt_dir)
1978                         continue;
1979
1980                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1981                         if (event_glob != NULL &&
1982                             !strglobmatch(evt_dirent->d_name, event_glob))
1983                                 continue;
1984
1985                         if (!evt_num_known) {
1986                                 evt_num++;
1987                                 continue;
1988                         }
1989
1990                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1991                                  sys_dirent->d_name, evt_dirent->d_name);
1992
1993                         evt_list[evt_i] = strdup(evt_path);
1994                         if (evt_list[evt_i] == NULL)
1995                                 goto out_close_evt_dir;
1996                         evt_i++;
1997                 }
1998                 closedir(evt_dir);
1999         }
2000         closedir(sys_dir);
2001
2002         if (!evt_num_known) {
2003                 evt_num_known = true;
2004                 goto restart;
2005         }
2006         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2007         evt_i = 0;
2008         while (evt_i < evt_num) {
2009                 if (name_only) {
2010                         printf("%s ", evt_list[evt_i++]);
2011                         continue;
2012                 }
2013                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2014                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2015         }
2016         if (evt_num && pager_in_use())
2017                 printf("\n");
2018
2019 out_free:
2020         evt_num = evt_i;
2021         for (evt_i = 0; evt_i < evt_num; evt_i++)
2022                 zfree(&evt_list[evt_i]);
2023         zfree(&evt_list);
2024         return;
2025
2026 out_close_evt_dir:
2027         closedir(evt_dir);
2028 out_close_sys_dir:
2029         closedir(sys_dir);
2030
2031         printf("FATAL: not enough memory to print %s\n",
2032                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2033         if (evt_list)
2034                 goto out_free;
2035 }
2036
2037 /*
2038  * Check whether event is in <debugfs_mount_point>/tracing/events
2039  */
2040
2041 int is_valid_tracepoint(const char *event_string)
2042 {
2043         DIR *sys_dir, *evt_dir;
2044         struct dirent *sys_dirent, *evt_dirent;
2045         char evt_path[MAXPATHLEN];
2046         char dir_path[MAXPATHLEN];
2047
2048         sys_dir = opendir(tracing_events_path);
2049         if (!sys_dir)
2050                 return 0;
2051
2052         for_each_subsystem(sys_dir, sys_dirent) {
2053
2054                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2055                          sys_dirent->d_name);
2056                 evt_dir = opendir(dir_path);
2057                 if (!evt_dir)
2058                         continue;
2059
2060                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2061                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2062                                  sys_dirent->d_name, evt_dirent->d_name);
2063                         if (!strcmp(evt_path, event_string)) {
2064                                 closedir(evt_dir);
2065                                 closedir(sys_dir);
2066                                 return 1;
2067                         }
2068                 }
2069                 closedir(evt_dir);
2070         }
2071         closedir(sys_dir);
2072         return 0;
2073 }
2074
2075 static bool is_event_supported(u8 type, unsigned config)
2076 {
2077         bool ret = true;
2078         int open_return;
2079         struct perf_evsel *evsel;
2080         struct perf_event_attr attr = {
2081                 .type = type,
2082                 .config = config,
2083                 .disabled = 1,
2084         };
2085         struct thread_map *tmap = thread_map__new_by_tid(0);
2086
2087         if (tmap == NULL)
2088                 return false;
2089
2090         evsel = perf_evsel__new(&attr);
2091         if (evsel) {
2092                 open_return = perf_evsel__open(evsel, NULL, tmap);
2093                 ret = open_return >= 0;
2094
2095                 if (open_return == -EACCES) {
2096                         /*
2097                          * This happens if the paranoid value
2098                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2099                          * Re-run with exclude_kernel set; we don't do that
2100                          * by default as some ARM machines do not support it.
2101                          *
2102                          */
2103                         evsel->attr.exclude_kernel = 1;
2104                         ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2105                 }
2106                 perf_evsel__delete(evsel);
2107         }
2108
2109         return ret;
2110 }
2111
2112 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2113                       bool name_only)
2114 {
2115         struct probe_cache *pcache;
2116         struct probe_cache_entry *ent;
2117         struct strlist *bidlist, *sdtlist;
2118         struct strlist_config cfg = {.dont_dupstr = true};
2119         struct str_node *nd, *nd2;
2120         char *buf, *path, *ptr = NULL;
2121         bool show_detail = false;
2122         int ret;
2123
2124         sdtlist = strlist__new(NULL, &cfg);
2125         if (!sdtlist) {
2126                 pr_debug("Failed to allocate new strlist for SDT\n");
2127                 return;
2128         }
2129         bidlist = build_id_cache__list_all(true);
2130         if (!bidlist) {
2131                 pr_debug("Failed to get buildids: %d\n", errno);
2132                 return;
2133         }
2134         strlist__for_each_entry(nd, bidlist) {
2135                 pcache = probe_cache__new(nd->s, NULL);
2136                 if (!pcache)
2137                         continue;
2138                 list_for_each_entry(ent, &pcache->entries, node) {
2139                         if (!ent->sdt)
2140                                 continue;
2141                         if (subsys_glob &&
2142                             !strglobmatch(ent->pev.group, subsys_glob))
2143                                 continue;
2144                         if (event_glob &&
2145                             !strglobmatch(ent->pev.event, event_glob))
2146                                 continue;
2147                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2148                                         ent->pev.event, nd->s);
2149                         if (ret > 0)
2150                                 strlist__add(sdtlist, buf);
2151                 }
2152                 probe_cache__delete(pcache);
2153         }
2154         strlist__delete(bidlist);
2155
2156         strlist__for_each_entry(nd, sdtlist) {
2157                 buf = strchr(nd->s, '@');
2158                 if (buf)
2159                         *(buf++) = '\0';
2160                 if (name_only) {
2161                         printf("%s ", nd->s);
2162                         continue;
2163                 }
2164                 nd2 = strlist__next(nd);
2165                 if (nd2) {
2166                         ptr = strchr(nd2->s, '@');
2167                         if (ptr)
2168                                 *ptr = '\0';
2169                         if (strcmp(nd->s, nd2->s) == 0)
2170                                 show_detail = true;
2171                 }
2172                 if (show_detail) {
2173                         path = build_id_cache__origname(buf);
2174                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2175                         if (ret > 0) {
2176                                 printf("  %-50s [%s]\n", buf, "SDT event");
2177                                 free(buf);
2178                         }
2179                 } else
2180                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2181                 if (nd2) {
2182                         if (strcmp(nd->s, nd2->s) != 0)
2183                                 show_detail = false;
2184                         if (ptr)
2185                                 *ptr = '@';
2186                 }
2187         }
2188         strlist__delete(sdtlist);
2189 }
2190
2191 int print_hwcache_events(const char *event_glob, bool name_only)
2192 {
2193         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2194         char name[64];
2195         char **evt_list = NULL;
2196         bool evt_num_known = false;
2197
2198 restart:
2199         if (evt_num_known) {
2200                 evt_list = zalloc(sizeof(char *) * evt_num);
2201                 if (!evt_list)
2202                         goto out_enomem;
2203         }
2204
2205         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2206                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2207                         /* skip invalid cache type */
2208                         if (!perf_evsel__is_cache_op_valid(type, op))
2209                                 continue;
2210
2211                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2212                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2213                                                                         name, sizeof(name));
2214                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2215                                         continue;
2216
2217                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2218                                                         type | (op << 8) | (i << 16)))
2219                                         continue;
2220
2221                                 if (!evt_num_known) {
2222                                         evt_num++;
2223                                         continue;
2224                                 }
2225
2226                                 evt_list[evt_i] = strdup(name);
2227                                 if (evt_list[evt_i] == NULL)
2228                                         goto out_enomem;
2229                                 evt_i++;
2230                         }
2231                 }
2232         }
2233
2234         if (!evt_num_known) {
2235                 evt_num_known = true;
2236                 goto restart;
2237         }
2238         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2239         evt_i = 0;
2240         while (evt_i < evt_num) {
2241                 if (name_only) {
2242                         printf("%s ", evt_list[evt_i++]);
2243                         continue;
2244                 }
2245                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2246                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2247         }
2248         if (evt_num && pager_in_use())
2249                 printf("\n");
2250
2251 out_free:
2252         evt_num = evt_i;
2253         for (evt_i = 0; evt_i < evt_num; evt_i++)
2254                 zfree(&evt_list[evt_i]);
2255         zfree(&evt_list);
2256         return evt_num;
2257
2258 out_enomem:
2259         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2260         if (evt_list)
2261                 goto out_free;
2262         return evt_num;
2263 }
2264
2265 void print_symbol_events(const char *event_glob, unsigned type,
2266                                 struct event_symbol *syms, unsigned max,
2267                                 bool name_only)
2268 {
2269         unsigned int i, evt_i = 0, evt_num = 0;
2270         char name[MAX_NAME_LEN];
2271         char **evt_list = NULL;
2272         bool evt_num_known = false;
2273
2274 restart:
2275         if (evt_num_known) {
2276                 evt_list = zalloc(sizeof(char *) * evt_num);
2277                 if (!evt_list)
2278                         goto out_enomem;
2279                 syms -= max;
2280         }
2281
2282         for (i = 0; i < max; i++, syms++) {
2283
2284                 if (event_glob != NULL && syms->symbol != NULL &&
2285                     !(strglobmatch(syms->symbol, event_glob) ||
2286                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2287                         continue;
2288
2289                 if (!is_event_supported(type, i))
2290                         continue;
2291
2292                 if (!evt_num_known) {
2293                         evt_num++;
2294                         continue;
2295                 }
2296
2297                 if (!name_only && strlen(syms->alias))
2298                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2299                 else
2300                         strncpy(name, syms->symbol, MAX_NAME_LEN);
2301
2302                 evt_list[evt_i] = strdup(name);
2303                 if (evt_list[evt_i] == NULL)
2304                         goto out_enomem;
2305                 evt_i++;
2306         }
2307
2308         if (!evt_num_known) {
2309                 evt_num_known = true;
2310                 goto restart;
2311         }
2312         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2313         evt_i = 0;
2314         while (evt_i < evt_num) {
2315                 if (name_only) {
2316                         printf("%s ", evt_list[evt_i++]);
2317                         continue;
2318                 }
2319                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2320         }
2321         if (evt_num && pager_in_use())
2322                 printf("\n");
2323
2324 out_free:
2325         evt_num = evt_i;
2326         for (evt_i = 0; evt_i < evt_num; evt_i++)
2327                 zfree(&evt_list[evt_i]);
2328         zfree(&evt_list);
2329         return;
2330
2331 out_enomem:
2332         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2333         if (evt_list)
2334                 goto out_free;
2335 }
2336
2337 /*
2338  * Print the help text for the event symbols:
2339  */
2340 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2341                         bool long_desc, bool details_flag)
2342 {
2343         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2344                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2345
2346         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2347                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2348
2349         print_hwcache_events(event_glob, name_only);
2350
2351         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2352                         details_flag);
2353
2354         if (event_glob != NULL)
2355                 return;
2356
2357         if (!name_only) {
2358                 printf("  %-50s [%s]\n",
2359                        "rNNN",
2360                        event_type_descriptors[PERF_TYPE_RAW]);
2361                 printf("  %-50s [%s]\n",
2362                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2363                        event_type_descriptors[PERF_TYPE_RAW]);
2364                 if (pager_in_use())
2365                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2366
2367                 printf("  %-50s [%s]\n",
2368                        "mem:<addr>[/len][:access]",
2369                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2370                 if (pager_in_use())
2371                         printf("\n");
2372         }
2373
2374         print_tracepoint_events(NULL, NULL, name_only);
2375
2376         print_sdt_events(NULL, NULL, name_only);
2377 }
2378
2379 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2380 {
2381         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2382 }
2383
2384 static int new_term(struct parse_events_term **_term,
2385                     struct parse_events_term *temp,
2386                     char *str, u64 num)
2387 {
2388         struct parse_events_term *term;
2389
2390         term = malloc(sizeof(*term));
2391         if (!term)
2392                 return -ENOMEM;
2393
2394         *term = *temp;
2395         INIT_LIST_HEAD(&term->list);
2396
2397         switch (term->type_val) {
2398         case PARSE_EVENTS__TERM_TYPE_NUM:
2399                 term->val.num = num;
2400                 break;
2401         case PARSE_EVENTS__TERM_TYPE_STR:
2402                 term->val.str = str;
2403                 break;
2404         default:
2405                 free(term);
2406                 return -EINVAL;
2407         }
2408
2409         *_term = term;
2410         return 0;
2411 }
2412
2413 int parse_events_term__num(struct parse_events_term **term,
2414                            int type_term, char *config, u64 num,
2415                            bool no_value,
2416                            void *loc_term_, void *loc_val_)
2417 {
2418         YYLTYPE *loc_term = loc_term_;
2419         YYLTYPE *loc_val = loc_val_;
2420
2421         struct parse_events_term temp = {
2422                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2423                 .type_term = type_term,
2424                 .config    = config,
2425                 .no_value  = no_value,
2426                 .err_term  = loc_term ? loc_term->first_column : 0,
2427                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2428         };
2429
2430         return new_term(term, &temp, NULL, num);
2431 }
2432
2433 int parse_events_term__str(struct parse_events_term **term,
2434                            int type_term, char *config, char *str,
2435                            void *loc_term_, void *loc_val_)
2436 {
2437         YYLTYPE *loc_term = loc_term_;
2438         YYLTYPE *loc_val = loc_val_;
2439
2440         struct parse_events_term temp = {
2441                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2442                 .type_term = type_term,
2443                 .config    = config,
2444                 .err_term  = loc_term ? loc_term->first_column : 0,
2445                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2446         };
2447
2448         return new_term(term, &temp, str, 0);
2449 }
2450
2451 int parse_events_term__sym_hw(struct parse_events_term **term,
2452                               char *config, unsigned idx)
2453 {
2454         struct event_symbol *sym;
2455         struct parse_events_term temp = {
2456                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2457                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2458                 .config    = config ?: (char *) "event",
2459         };
2460
2461         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2462         sym = &event_symbols_hw[idx];
2463
2464         return new_term(term, &temp, (char *) sym->symbol, 0);
2465 }
2466
2467 int parse_events_term__clone(struct parse_events_term **new,
2468                              struct parse_events_term *term)
2469 {
2470         struct parse_events_term temp = {
2471                 .type_val  = term->type_val,
2472                 .type_term = term->type_term,
2473                 .config    = term->config,
2474                 .err_term  = term->err_term,
2475                 .err_val   = term->err_val,
2476         };
2477
2478         return new_term(new, &temp, term->val.str, term->val.num);
2479 }
2480
2481 int parse_events_copy_term_list(struct list_head *old,
2482                                  struct list_head **new)
2483 {
2484         struct parse_events_term *term, *n;
2485         int ret;
2486
2487         if (!old) {
2488                 *new = NULL;
2489                 return 0;
2490         }
2491
2492         *new = malloc(sizeof(struct list_head));
2493         if (!*new)
2494                 return -ENOMEM;
2495         INIT_LIST_HEAD(*new);
2496
2497         list_for_each_entry (term, old, list) {
2498                 ret = parse_events_term__clone(&n, term);
2499                 if (ret)
2500                         return ret;
2501                 list_add_tail(&n->list, *new);
2502         }
2503         return 0;
2504 }
2505
2506 void parse_events_terms__purge(struct list_head *terms)
2507 {
2508         struct parse_events_term *term, *h;
2509
2510         list_for_each_entry_safe(term, h, terms, list) {
2511                 if (term->array.nr_ranges)
2512                         zfree(&term->array.ranges);
2513                 list_del_init(&term->list);
2514                 free(term);
2515         }
2516 }
2517
2518 void parse_events_terms__delete(struct list_head *terms)
2519 {
2520         if (!terms)
2521                 return;
2522         parse_events_terms__purge(terms);
2523         free(terms);
2524 }
2525
2526 void parse_events__clear_array(struct parse_events_array *a)
2527 {
2528         zfree(&a->ranges);
2529 }
2530
2531 void parse_events_evlist_error(struct parse_events_state *parse_state,
2532                                int idx, const char *str)
2533 {
2534         struct parse_events_error *err = parse_state->error;
2535
2536         if (!err)
2537                 return;
2538         err->idx = idx;
2539         err->str = strdup(str);
2540         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2541 }
2542
2543 static void config_terms_list(char *buf, size_t buf_sz)
2544 {
2545         int i;
2546         bool first = true;
2547
2548         buf[0] = '\0';
2549         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2550                 const char *name = config_term_names[i];
2551
2552                 if (!config_term_avail(i, NULL))
2553                         continue;
2554                 if (!name)
2555                         continue;
2556                 if (name[0] == '<')
2557                         continue;
2558
2559                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2560                         return;
2561
2562                 if (!first)
2563                         strcat(buf, ",");
2564                 else
2565                         first = false;
2566                 strcat(buf, name);
2567         }
2568 }
2569
2570 /*
2571  * Return string contains valid config terms of an event.
2572  * @additional_terms: For terms such as PMU sysfs terms.
2573  */
2574 char *parse_events_formats_error_string(char *additional_terms)
2575 {
2576         char *str;
2577         /* "no-overwrite" is the longest name */
2578         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2579                           (sizeof("no-overwrite") - 1)];
2580
2581         config_terms_list(static_terms, sizeof(static_terms));
2582         /* valid terms */
2583         if (additional_terms) {
2584                 if (asprintf(&str, "valid terms: %s,%s",
2585                              additional_terms, static_terms) < 0)
2586                         goto fail;
2587         } else {
2588                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2589                         goto fail;
2590         }
2591         return str;
2592
2593 fail:
2594         return NULL;
2595 }