tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <dirent.h>
   5 #include <errno.h>
   6 #include <sys/ioctl.h>
   7 #include <sys/param.h>
   8 #include "term.h"
   9 #include "../perf.h"
  10 #include "evlist.h"
  11 #include "evsel.h"
  12 #include <subcmd/parse-options.h>
  13 #include "parse-events.h"
  14 #include <subcmd/exec-cmd.h>
  15 #include "string2.h"
  16 #include "strlist.h"
  17 #include "symbol.h"
  18 #include "cache.h"
  19 #include "header.h"
  20 #include "bpf-loader.h"
  21 #include "debug.h"
  22 #include <api/fs/tracing_path.h>
  23 #include "parse-events-bison.h"
  24 #define YY_EXTRA_TYPE int
  25 #include "parse-events-flex.h"
  26 #include "pmu.h"
  27 #include "thread_map.h"
  28 #include "cpumap.h"
  29 #include "probe-file.h"
  30 #include "asm/bug.h"
  31 #include "util/parse-branch-options.h"
  32
  33 #define MAX_NAME_LEN 100
  34
  35 #ifdef PARSER_DEBUG
  36 extern int parse_events_debug;
  37 #endif
  38 int parse_events_parse(void *parse_state, void *scanner);
  39 static int get_config_terms(struct list_head *head_config,
  40                             struct list_head *head_terms __maybe_unused);
  41
  42 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  43 /*
  44  * The variable indicates the number of supported pmu event symbols.
  45  * 0 means not initialized and ready to init
  46  * -1 means failed to init, don't try anymore
  47  * >0 is the number of supported pmu event symbols
  48  */
  49 static int perf_pmu_events_list_num;
  50
  51 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  52         [PERF_COUNT_HW_CPU_CYCLES] = {
  53                 .symbol = "cpu-cycles",
  54                 .alias  = "cycles",
  55         },
  56         [PERF_COUNT_HW_INSTRUCTIONS] = {
  57                 .symbol = "instructions",
  58                 .alias  = "",
  59         },
  60         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  61                 .symbol = "cache-references",
  62                 .alias  = "",
  63         },
  64         [PERF_COUNT_HW_CACHE_MISSES] = {
  65                 .symbol = "cache-misses",
  66                 .alias  = "",
  67         },
  68         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  69                 .symbol = "branch-instructions",
  70                 .alias  = "branches",
  71         },
  72         [PERF_COUNT_HW_BRANCH_MISSES] = {
  73                 .symbol = "branch-misses",
  74                 .alias  = "",
  75         },
  76         [PERF_COUNT_HW_BUS_CYCLES] = {
  77                 .symbol = "bus-cycles",
  78                 .alias  = "",
  79         },
  80         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  81                 .symbol = "stalled-cycles-frontend",
  82                 .alias  = "idle-cycles-frontend",
  83         },
  84         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  85                 .symbol = "stalled-cycles-backend",
  86                 .alias  = "idle-cycles-backend",
  87         },
  88         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  89                 .symbol = "ref-cycles",
  90                 .alias  = "",
  91         },
  92 };
  93
  94 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  95         [PERF_COUNT_SW_CPU_CLOCK] = {
  96                 .symbol = "cpu-clock",
  97                 .alias  = "",
  98         },
  99         [PERF_COUNT_SW_TASK_CLOCK] = {
 100                 .symbol = "task-clock",
 101                 .alias  = "",
 102         },
 103         [PERF_COUNT_SW_PAGE_FAULTS] = {
 104                 .symbol = "page-faults",
 105                 .alias  = "faults",
 106         },
 107         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 108                 .symbol = "context-switches",
 109                 .alias  = "cs",
 110         },
 111         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 112                 .symbol = "cpu-migrations",
 113                 .alias  = "migrations",
 114         },
 115         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 116                 .symbol = "minor-faults",
 117                 .alias  = "",
 118         },
 119         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 120                 .symbol = "major-faults",
 121                 .alias  = "",
 122         },
 123         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 124                 .symbol = "alignment-faults",
 125                 .alias  = "",
 126         },
 127         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 128                 .symbol = "emulation-faults",
 129                 .alias  = "",
 130         },
 131         [PERF_COUNT_SW_DUMMY] = {
 132                 .symbol = "dummy",
 133                 .alias  = "",
 134         },
 135         [PERF_COUNT_SW_BPF_OUTPUT] = {
 136                 .symbol = "bpf-output",
 137                 .alias  = "",
 138         },
 139 };
 140
 141 #define __PERF_EVENT_FIELD(config, name) \
 142         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 143
 144 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 145 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 146 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 147 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 148
 149 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 150         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 151                 if (sys_dirent->d_type == DT_DIR &&             \
 152                     (strcmp(sys_dirent->d_name, ".")) &&        \
 153                     (strcmp(sys_dirent->d_name, "..")))
 154
 155 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 156 {
 157         char evt_path[MAXPATHLEN];
 158         int fd;
 159
 160         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 161                         sys_dir->d_name, evt_dir->d_name);
 162         fd = open(evt_path, O_RDONLY);
 163         if (fd < 0)
 164                 return -EINVAL;
 165         close(fd);
 166
 167         return 0;
 168 }
 169
 170 #define for_each_event(sys_dirent, evt_dir, evt_dirent)         \
 171         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 172                 if (evt_dirent->d_type == DT_DIR &&             \
 173                     (strcmp(evt_dirent->d_name, ".")) &&        \
 174                     (strcmp(evt_dirent->d_name, "..")) &&       \
 175                     (!tp_event_has_id(sys_dirent, evt_dirent)))
 176
 177 #define MAX_EVENT_LENGTH 512
 178
 179
 180 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 181 {
 182         struct tracepoint_path *path = NULL;
 183         DIR *sys_dir, *evt_dir;
 184         struct dirent *sys_dirent, *evt_dirent;
 185         char id_buf[24];
 186         int fd;
 187         u64 id;
 188         char evt_path[MAXPATHLEN];
 189         char dir_path[MAXPATHLEN];
 190
 191         sys_dir = opendir(tracing_events_path);
 192         if (!sys_dir)
 193                 return NULL;
 194
 195         for_each_subsystem(sys_dir, sys_dirent) {
 196
 197                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 198                          sys_dirent->d_name);
 199                 evt_dir = opendir(dir_path);
 200                 if (!evt_dir)
 201                         continue;
 202
 203                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
 204
 205                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 206                                   evt_dirent->d_name);
 207                         fd = open(evt_path, O_RDONLY);
 208                         if (fd < 0)
 209                                 continue;
 210                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 211                                 close(fd);
 212                                 continue;
 213                         }
 214                         close(fd);
 215                         id = atoll(id_buf);
 216                         if (id == config) {
 217                                 closedir(evt_dir);
 218                                 closedir(sys_dir);
 219                                 path = zalloc(sizeof(*path));
 220                                 if (!path)
 221                                         return NULL;
 222                                 path->system = malloc(MAX_EVENT_LENGTH);
 223                                 if (!path->system) {
 224                                         free(path);
 225                                         return NULL;
 226                                 }
 227                                 path->name = malloc(MAX_EVENT_LENGTH);
 228                                 if (!path->name) {
 229                                         zfree(&path->system);
 230                                         free(path);
 231                                         return NULL;
 232                                 }
 233                                 strncpy(path->system, sys_dirent->d_name,
 234                                         MAX_EVENT_LENGTH);
 235                                 strncpy(path->name, evt_dirent->d_name,
 236                                         MAX_EVENT_LENGTH);
 237                                 return path;
 238                         }
 239                 }
 240                 closedir(evt_dir);
 241         }
 242
 243         closedir(sys_dir);
 244         return NULL;
 245 }
 246
 247 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 248 {
 249         struct tracepoint_path *path = zalloc(sizeof(*path));
 250         char *str = strchr(name, ':');
 251
 252         if (path == NULL || str == NULL) {
 253                 free(path);
 254                 return NULL;
 255         }
 256
 257         path->system = strndup(name, str - name);
 258         path->name = strdup(str+1);
 259
 260         if (path->system == NULL || path->name == NULL) {
 261                 zfree(&path->system);
 262                 zfree(&path->name);
 263                 zfree(&path);
 264         }
 265
 266         return path;
 267 }
 268
 269 const char *event_type(int type)
 270 {
 271         switch (type) {
 272         case PERF_TYPE_HARDWARE:
 273                 return "hardware";
 274
 275         case PERF_TYPE_SOFTWARE:
 276                 return "software";
 277
 278         case PERF_TYPE_TRACEPOINT:
 279                 return "tracepoint";
 280
 281         case PERF_TYPE_HW_CACHE:
 282                 return "hardware-cache";
 283
 284         default:
 285                 break;
 286         }
 287
 288         return "unknown";
 289 }
 290
 291 static int parse_events__is_name_term(struct parse_events_term *term)
 292 {
 293         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 294 }
 295
 296 static char *get_config_name(struct list_head *head_terms)
 297 {
 298         struct parse_events_term *term;
 299
 300         if (!head_terms)
 301                 return NULL;
 302
 303         list_for_each_entry(term, head_terms, list)
 304                 if (parse_events__is_name_term(term))
 305                         return term->val.str;
 306
 307         return NULL;
 308 }
 309
 310 static struct perf_evsel *
 311 __add_event(struct list_head *list, int *idx,
 312             struct perf_event_attr *attr,
 313             char *name, struct perf_pmu *pmu,
 314             struct list_head *config_terms, bool auto_merge_stats)
 315 {
 316         struct perf_evsel *evsel;
 317         struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
 318
 319         event_attr_init(attr);
 320
 321         evsel = perf_evsel__new_idx(attr, *idx);
 322         if (!evsel)
 323                 return NULL;
 324
 325         (*idx)++;
 326         evsel->cpus        = cpu_map__get(cpus);
 327         evsel->own_cpus    = cpu_map__get(cpus);
 328         evsel->system_wide = pmu ? pmu->is_uncore : false;
 329         evsel->auto_merge_stats = auto_merge_stats;
 330
 331         if (name)
 332                 evsel->name = strdup(name);
 333
 334         if (config_terms)
 335                 list_splice(config_terms, &evsel->config_terms);
 336
 337         list_add_tail(&evsel->node, list);
 338         return evsel;
 339 }
 340
 341 static int add_event(struct list_head *list, int *idx,
 342                      struct perf_event_attr *attr, char *name,
 343                      struct list_head *config_terms)
 344 {
 345         return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
 346 }
 347
 348 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 349 {
 350         int i, j;
 351         int n, longest = -1;
 352
 353         for (i = 0; i < size; i++) {
 354                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 355                         n = strlen(names[i][j]);
 356                         if (n > longest && !strncasecmp(str, names[i][j], n))
 357                                 longest = n;
 358                 }
 359                 if (longest > 0)
 360                         return i;
 361         }
 362
 363         return -1;
 364 }
 365
 366 typedef int config_term_func_t(struct perf_event_attr *attr,
 367                                struct parse_events_term *term,
 368                                struct parse_events_error *err);
 369 static int config_term_common(struct perf_event_attr *attr,
 370                               struct parse_events_term *term,
 371                               struct parse_events_error *err);
 372 static int config_attr(struct perf_event_attr *attr,
 373                        struct list_head *head,
 374                        struct parse_events_error *err,
 375                        config_term_func_t config_term);
 376
 377 int parse_events_add_cache(struct list_head *list, int *idx,
 378                            char *type, char *op_result1, char *op_result2,
 379                            struct parse_events_error *err,
 380                            struct list_head *head_config)
 381 {
 382         struct perf_event_attr attr;
 383         LIST_HEAD(config_terms);
 384         char name[MAX_NAME_LEN], *config_name;
 385         int cache_type = -1, cache_op = -1, cache_result = -1;
 386         char *op_result[2] = { op_result1, op_result2 };
 387         int i, n;
 388
 389         /*
 390          * No fallback - if we cannot get a clear cache type
 391          * then bail out:
 392          */
 393         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 394                                    PERF_COUNT_HW_CACHE_MAX);
 395         if (cache_type == -1)
 396                 return -EINVAL;
 397
 398         config_name = get_config_name(head_config);
 399         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 400
 401         for (i = 0; (i < 2) && (op_result[i]); i++) {
 402                 char *str = op_result[i];
 403
 404                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 405
 406                 if (cache_op == -1) {
 407                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 408                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 409                         if (cache_op >= 0) {
 410                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 411                                         return -EINVAL;
 412                                 continue;
 413                         }
 414                 }
 415
 416                 if (cache_result == -1) {
 417                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 418                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 419                         if (cache_result >= 0)
 420                                 continue;
 421                 }
 422         }
 423
 424         /*
 425          * Fall back to reads:
 426          */
 427         if (cache_op == -1)
 428                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 429
 430         /*
 431          * Fall back to accesses:
 432          */
 433         if (cache_result == -1)
 434                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 435
 436         memset(&attr, 0, sizeof(attr));
 437         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 438         attr.type = PERF_TYPE_HW_CACHE;
 439
 440         if (head_config) {
 441                 if (config_attr(&attr, head_config, err,
 442                                 config_term_common))
 443                         return -EINVAL;
 444
 445                 if (get_config_terms(head_config, &config_terms))
 446                         return -ENOMEM;
 447         }
 448         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 449 }
 450
 451 static void tracepoint_error(struct parse_events_error *e, int err,
 452                              const char *sys, const char *name)
 453 {
 454         char help[BUFSIZ];
 455
 456         if (!e)
 457                 return;
 458
 459         /*
 460          * We get error directly from syscall errno ( > 0),
 461          * or from encoded pointer's error ( < 0).
 462          */
 463         err = abs(err);
 464
 465         switch (err) {
 466         case EACCES:
 467                 e->str = strdup("can't access trace events");
 468                 break;
 469         case ENOENT:
 470                 e->str = strdup("unknown tracepoint");
 471                 break;
 472         default:
 473                 e->str = strdup("failed to add tracepoint");
 474                 break;
 475         }
 476
 477         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 478         e->help = strdup(help);
 479 }
 480
 481 static int add_tracepoint(struct list_head *list, int *idx,
 482                           const char *sys_name, const char *evt_name,
 483                           struct parse_events_error *err,
 484                           struct list_head *head_config)
 485 {
 486         struct perf_evsel *evsel;
 487
 488         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 489         if (IS_ERR(evsel)) {
 490                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 491                 return PTR_ERR(evsel);
 492         }
 493
 494         if (head_config) {
 495                 LIST_HEAD(config_terms);
 496
 497                 if (get_config_terms(head_config, &config_terms))
 498                         return -ENOMEM;
 499                 list_splice(&config_terms, &evsel->config_terms);
 500         }
 501
 502         list_add_tail(&evsel->node, list);
 503         return 0;
 504 }
 505
 506 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 507                                       const char *sys_name, const char *evt_name,
 508                                       struct parse_events_error *err,
 509                                       struct list_head *head_config)
 510 {
 511         char evt_path[MAXPATHLEN];
 512         struct dirent *evt_ent;
 513         DIR *evt_dir;
 514         int ret = 0, found = 0;
 515
 516         snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 517         evt_dir = opendir(evt_path);
 518         if (!evt_dir) {
 519                 tracepoint_error(err, errno, sys_name, evt_name);
 520                 return -1;
 521         }
 522
 523         while (!ret && (evt_ent = readdir(evt_dir))) {
 524                 if (!strcmp(evt_ent->d_name, ".")
 525                     || !strcmp(evt_ent->d_name, "..")
 526                     || !strcmp(evt_ent->d_name, "enable")
 527                     || !strcmp(evt_ent->d_name, "filter"))
 528                         continue;
 529
 530                 if (!strglobmatch(evt_ent->d_name, evt_name))
 531                         continue;
 532
 533                 found++;
 534
 535                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 536                                      err, head_config);
 537         }
 538
 539         if (!found) {
 540                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 541                 ret = -1;
 542         }
 543
 544         closedir(evt_dir);
 545         return ret;
 546 }
 547
 548 static int add_tracepoint_event(struct list_head *list, int *idx,
 549                                 const char *sys_name, const char *evt_name,
 550                                 struct parse_events_error *err,
 551                                 struct list_head *head_config)
 552 {
 553         return strpbrk(evt_name, "*?") ?
 554                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 555                                           err, head_config) :
 556                add_tracepoint(list, idx, sys_name, evt_name,
 557                               err, head_config);
 558 }
 559
 560 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 561                                     const char *sys_name, const char *evt_name,
 562                                     struct parse_events_error *err,
 563                                     struct list_head *head_config)
 564 {
 565         struct dirent *events_ent;
 566         DIR *events_dir;
 567         int ret = 0;
 568
 569         events_dir = opendir(tracing_events_path);
 570         if (!events_dir) {
 571                 tracepoint_error(err, errno, sys_name, evt_name);
 572                 return -1;
 573         }
 574
 575         while (!ret && (events_ent = readdir(events_dir))) {
 576                 if (!strcmp(events_ent->d_name, ".")
 577                     || !strcmp(events_ent->d_name, "..")
 578                     || !strcmp(events_ent->d_name, "enable")
 579                     || !strcmp(events_ent->d_name, "header_event")
 580                     || !strcmp(events_ent->d_name, "header_page"))
 581                         continue;
 582
 583                 if (!strglobmatch(events_ent->d_name, sys_name))
 584                         continue;
 585
 586                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 587                                            evt_name, err, head_config);
 588         }
 589
 590         closedir(events_dir);
 591         return ret;
 592 }
 593
 594 struct __add_bpf_event_param {
 595         struct parse_events_state *parse_state;
 596         struct list_head *list;
 597         struct list_head *head_config;
 598 };
 599
 600 static int add_bpf_event(const char *group, const char *event, int fd,
 601                          void *_param)
 602 {
 603         LIST_HEAD(new_evsels);
 604         struct __add_bpf_event_param *param = _param;
 605         struct parse_events_state *parse_state = param->parse_state;
 606         struct list_head *list = param->list;
 607         struct perf_evsel *pos;
 608         int err;
 609
 610         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 611                  group, event, fd);
 612
 613         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 614                                           event, parse_state->error,
 615                                           param->head_config);
 616         if (err) {
 617                 struct perf_evsel *evsel, *tmp;
 618
 619                 pr_debug("Failed to add BPF event %s:%s\n",
 620                          group, event);
 621                 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
 622                         list_del(&evsel->node);
 623                         perf_evsel__delete(evsel);
 624                 }
 625                 return err;
 626         }
 627         pr_debug("adding %s:%s\n", group, event);
 628
 629         list_for_each_entry(pos, &new_evsels, node) {
 630                 pr_debug("adding %s:%s to %p\n",
 631                          group, event, pos);
 632                 pos->bpf_fd = fd;
 633         }
 634         list_splice(&new_evsels, list);
 635         return 0;
 636 }
 637
 638 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 639                               struct list_head *list,
 640                               struct bpf_object *obj,
 641                               struct list_head *head_config)
 642 {
 643         int err;
 644         char errbuf[BUFSIZ];
 645         struct __add_bpf_event_param param = {parse_state, list, head_config};
 646         static bool registered_unprobe_atexit = false;
 647
 648         if (IS_ERR(obj) || !obj) {
 649                 snprintf(errbuf, sizeof(errbuf),
 650                          "Internal error: load bpf obj with NULL");
 651                 err = -EINVAL;
 652                 goto errout;
 653         }
 654
 655         /*
 656          * Register atexit handler before calling bpf__probe() so
 657          * bpf__probe() don't need to unprobe probe points its already
 658          * created when failure.
 659          */
 660         if (!registered_unprobe_atexit) {
 661                 atexit(bpf__clear);
 662                 registered_unprobe_atexit = true;
 663         }
 664
 665         err = bpf__probe(obj);
 666         if (err) {
 667                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 668                 goto errout;
 669         }
 670
 671         err = bpf__load(obj);
 672         if (err) {
 673                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 674                 goto errout;
 675         }
 676
 677         err = bpf__foreach_event(obj, add_bpf_event, &param);
 678         if (err) {
 679                 snprintf(errbuf, sizeof(errbuf),
 680                          "Attach events in BPF object failed");
 681                 goto errout;
 682         }
 683
 684         return 0;
 685 errout:
 686         parse_state->error->help = strdup("(add -v to see detail)");
 687         parse_state->error->str = strdup(errbuf);
 688         return err;
 689 }
 690
 691 static int
 692 parse_events_config_bpf(struct parse_events_state *parse_state,
 693                         struct bpf_object *obj,
 694                         struct list_head *head_config)
 695 {
 696         struct parse_events_term *term;
 697         int error_pos;
 698
 699         if (!head_config || list_empty(head_config))
 700                 return 0;
 701
 702         list_for_each_entry(term, head_config, list) {
 703                 char errbuf[BUFSIZ];
 704                 int err;
 705
 706                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 707                         snprintf(errbuf, sizeof(errbuf),
 708                                  "Invalid config term for BPF object");
 709                         errbuf[BUFSIZ - 1] = '\0';
 710
 711                         parse_state->error->idx = term->err_term;
 712                         parse_state->error->str = strdup(errbuf);
 713                         return -EINVAL;
 714                 }
 715
 716                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 717                 if (err) {
 718                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 719                                                  &error_pos, err, errbuf,
 720                                                  sizeof(errbuf));
 721                         parse_state->error->help = strdup(
 722 "Hint:\tValid config terms:\n"
 723 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 724 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 725 "\n"
 726 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 727 "     \t(add -v to see detail)");
 728                         parse_state->error->str = strdup(errbuf);
 729                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 730                                 parse_state->error->idx = term->err_val;
 731                         else
 732                                 parse_state->error->idx = term->err_term + error_pos;
 733                         return err;
 734                 }
 735         }
 736         return 0;
 737 }
 738
 739 /*
 740  * Split config terms:
 741  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 742  *  'call-graph=fp' is 'evt config', should be applied to each
 743  *  events in bpf.c.
 744  * 'map:array.value[0]=1' is 'obj config', should be processed
 745  * with parse_events_config_bpf.
 746  *
 747  * Move object config terms from the first list to obj_head_config.
 748  */
 749 static void
 750 split_bpf_config_terms(struct list_head *evt_head_config,
 751                        struct list_head *obj_head_config)
 752 {
 753         struct parse_events_term *term, *temp;
 754
 755         /*
 756          * Currectly, all possible user config term
 757          * belong to bpf object. parse_events__is_hardcoded_term()
 758          * happends to be a good flag.
 759          *
 760          * See parse_events_config_bpf() and
 761          * config_term_tracepoint().
 762          */
 763         list_for_each_entry_safe(term, temp, evt_head_config, list)
 764                 if (!parse_events__is_hardcoded_term(term))
 765                         list_move_tail(&term->list, obj_head_config);
 766 }
 767
 768 int parse_events_load_bpf(struct parse_events_state *parse_state,
 769                           struct list_head *list,
 770                           char *bpf_file_name,
 771                           bool source,
 772                           struct list_head *head_config)
 773 {
 774         int err;
 775         struct bpf_object *obj;
 776         LIST_HEAD(obj_head_config);
 777
 778         if (head_config)
 779                 split_bpf_config_terms(head_config, &obj_head_config);
 780
 781         obj = bpf__prepare_load(bpf_file_name, source);
 782         if (IS_ERR(obj)) {
 783                 char errbuf[BUFSIZ];
 784
 785                 err = PTR_ERR(obj);
 786
 787                 if (err == -ENOTSUP)
 788                         snprintf(errbuf, sizeof(errbuf),
 789                                  "BPF support is not compiled");
 790                 else
 791                         bpf__strerror_prepare_load(bpf_file_name,
 792                                                    source,
 793                                                    -err, errbuf,
 794                                                    sizeof(errbuf));
 795
 796                 parse_state->error->help = strdup("(add -v to see detail)");
 797                 parse_state->error->str = strdup(errbuf);
 798                 return err;
 799         }
 800
 801         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 802         if (err)
 803                 return err;
 804         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 805
 806         /*
 807          * Caller doesn't know anything about obj_head_config,
 808          * so combine them together again before returnning.
 809          */
 810         if (head_config)
 811                 list_splice_tail(&obj_head_config, head_config);
 812         return err;
 813 }
 814
 815 static int
 816 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 817 {
 818         int i;
 819
 820         for (i = 0; i < 3; i++) {
 821                 if (!type || !type[i])
 822                         break;
 823
 824 #define CHECK_SET_TYPE(bit)             \
 825 do {                                    \
 826         if (attr->bp_type & bit)        \
 827                 return -EINVAL;         \
 828         else                            \
 829                 attr->bp_type |= bit;   \
 830 } while (0)
 831
 832                 switch (type[i]) {
 833                 case 'r':
 834                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 835                         break;
 836                 case 'w':
 837                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 838                         break;
 839                 case 'x':
 840                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 841                         break;
 842                 default:
 843                         return -EINVAL;
 844                 }
 845         }
 846
 847 #undef CHECK_SET_TYPE
 848
 849         if (!attr->bp_type) /* Default */
 850                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 851
 852         return 0;
 853 }
 854
 855 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 856                                 void *ptr, char *type, u64 len)
 857 {
 858         struct perf_event_attr attr;
 859
 860         memset(&attr, 0, sizeof(attr));
 861         attr.bp_addr = (unsigned long) ptr;
 862
 863         if (parse_breakpoint_type(type, &attr))
 864                 return -EINVAL;
 865
 866         /* Provide some defaults if len is not specified */
 867         if (!len) {
 868                 if (attr.bp_type == HW_BREAKPOINT_X)
 869                         len = sizeof(long);
 870                 else
 871                         len = HW_BREAKPOINT_LEN_4;
 872         }
 873
 874         attr.bp_len = len;
 875
 876         attr.type = PERF_TYPE_BREAKPOINT;
 877         attr.sample_period = 1;
 878
 879         return add_event(list, idx, &attr, NULL, NULL);
 880 }
 881
 882 static int check_type_val(struct parse_events_term *term,
 883                           struct parse_events_error *err,
 884                           int type)
 885 {
 886         if (type == term->type_val)
 887                 return 0;
 888
 889         if (err) {
 890                 err->idx = term->err_val;
 891                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 892                         err->str = strdup("expected numeric value");
 893                 else
 894                         err->str = strdup("expected string value");
 895         }
 896         return -EINVAL;
 897 }
 898
 899 /*
 900  * Update according to parse-events.l
 901  */
 902 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 903         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 904         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 905         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 906         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 907         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 908         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 909         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 910         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 911         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 912         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 913         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 914         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 915         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 916         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 917         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 918         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 919         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 920 };
 921
 922 static bool config_term_shrinked;
 923
 924 static bool
 925 config_term_avail(int term_type, struct parse_events_error *err)
 926 {
 927         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 928                 err->str = strdup("Invalid term_type");
 929                 return false;
 930         }
 931         if (!config_term_shrinked)
 932                 return true;
 933
 934         switch (term_type) {
 935         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 936         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 937         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 938         case PARSE_EVENTS__TERM_TYPE_NAME:
 939         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 940                 return true;
 941         default:
 942                 if (!err)
 943                         return false;
 944
 945                 /* term_type is validated so indexing is safe */
 946                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 947                              config_term_names[term_type]) < 0)
 948                         err->str = NULL;
 949                 return false;
 950         }
 951 }
 952
 953 void parse_events__shrink_config_terms(void)
 954 {
 955         config_term_shrinked = true;
 956 }
 957
 958 static int config_term_common(struct perf_event_attr *attr,
 959                               struct parse_events_term *term,
 960                               struct parse_events_error *err)
 961 {
 962 #define CHECK_TYPE_VAL(type)                                               \
 963 do {                                                                       \
 964         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 965                 return -EINVAL;                                            \
 966 } while (0)
 967
 968         switch (term->type_term) {
 969         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 970                 CHECK_TYPE_VAL(NUM);
 971                 attr->config = term->val.num;
 972                 break;
 973         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 974                 CHECK_TYPE_VAL(NUM);
 975                 attr->config1 = term->val.num;
 976                 break;
 977         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 978                 CHECK_TYPE_VAL(NUM);
 979                 attr->config2 = term->val.num;
 980                 break;
 981         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 982                 CHECK_TYPE_VAL(NUM);
 983                 break;
 984         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 985                 CHECK_TYPE_VAL(NUM);
 986                 break;
 987         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 988                 CHECK_TYPE_VAL(STR);
 989                 if (strcmp(term->val.str, "no") &&
 990                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
 991                         err->str = strdup("invalid branch sample type");
 992                         err->idx = term->err_val;
 993                         return -EINVAL;
 994                 }
 995                 break;
 996         case PARSE_EVENTS__TERM_TYPE_TIME:
 997                 CHECK_TYPE_VAL(NUM);
 998                 if (term->val.num > 1) {
 999                         err->str = strdup("expected 0 or 1");
1000                         err->idx = term->err_val;
1001                         return -EINVAL;
1002                 }
1003                 break;
1004         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1005                 CHECK_TYPE_VAL(STR);
1006                 break;
1007         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1008                 CHECK_TYPE_VAL(NUM);
1009                 break;
1010         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1011                 CHECK_TYPE_VAL(NUM);
1012                 break;
1013         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1014                 CHECK_TYPE_VAL(NUM);
1015                 break;
1016         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1017                 CHECK_TYPE_VAL(NUM);
1018                 break;
1019         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1020                 CHECK_TYPE_VAL(NUM);
1021                 break;
1022         case PARSE_EVENTS__TERM_TYPE_NAME:
1023                 CHECK_TYPE_VAL(STR);
1024                 break;
1025         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1026                 CHECK_TYPE_VAL(NUM);
1027                 break;
1028         default:
1029                 err->str = strdup("unknown term");
1030                 err->idx = term->err_term;
1031                 err->help = parse_events_formats_error_string(NULL);
1032                 return -EINVAL;
1033         }
1034
1035         /*
1036          * Check term availbility after basic checking so
1037          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1038          *
1039          * If check availbility at the entry of this function,
1040          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1041          * if an invalid config term is provided for legacy events
1042          * (for example, instructions/badterm/...), which is confusing.
1043          */
1044         if (!config_term_avail(term->type_term, err))
1045                 return -EINVAL;
1046         return 0;
1047 #undef CHECK_TYPE_VAL
1048 }
1049
1050 static int config_term_pmu(struct perf_event_attr *attr,
1051                            struct parse_events_term *term,
1052                            struct parse_events_error *err)
1053 {
1054         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1055             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1056                 /*
1057                  * Always succeed for sysfs terms, as we dont know
1058                  * at this point what type they need to have.
1059                  */
1060                 return 0;
1061         else
1062                 return config_term_common(attr, term, err);
1063 }
1064
1065 static int config_term_tracepoint(struct perf_event_attr *attr,
1066                                   struct parse_events_term *term,
1067                                   struct parse_events_error *err)
1068 {
1069         switch (term->type_term) {
1070         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1071         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1072         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1073         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1074         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1075         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1076         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1077                 return config_term_common(attr, term, err);
1078         default:
1079                 if (err) {
1080                         err->idx = term->err_term;
1081                         err->str = strdup("unknown term");
1082                         err->help = strdup("valid terms: call-graph,stack-size\n");
1083                 }
1084                 return -EINVAL;
1085         }
1086
1087         return 0;
1088 }
1089
1090 static int config_attr(struct perf_event_attr *attr,
1091                        struct list_head *head,
1092                        struct parse_events_error *err,
1093                        config_term_func_t config_term)
1094 {
1095         struct parse_events_term *term;
1096
1097         list_for_each_entry(term, head, list)
1098                 if (config_term(attr, term, err))
1099                         return -EINVAL;
1100
1101         return 0;
1102 }
1103
1104 static int get_config_terms(struct list_head *head_config,
1105                             struct list_head *head_terms __maybe_unused)
1106 {
1107 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1108 do {                                                            \
1109         struct perf_evsel_config_term *__t;                     \
1110                                                                 \
1111         __t = zalloc(sizeof(*__t));                             \
1112         if (!__t)                                               \
1113                 return -ENOMEM;                                 \
1114                                                                 \
1115         INIT_LIST_HEAD(&__t->list);                             \
1116         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1117         __t->val.__name = __val;                                \
1118         __t->weak       = term->weak;                           \
1119         list_add_tail(&__t->list, head_terms);                  \
1120 } while (0)
1121
1122         struct parse_events_term *term;
1123
1124         list_for_each_entry(term, head_config, list) {
1125                 switch (term->type_term) {
1126                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1127                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1128                         break;
1129                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1130                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1131                         break;
1132                 case PARSE_EVENTS__TERM_TYPE_TIME:
1133                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1134                         break;
1135                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1136                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1137                         break;
1138                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1139                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1140                         break;
1141                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1142                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1143                         break;
1144                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1145                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1146                         break;
1147                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1148                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1149                         break;
1150                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1151                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1152                         break;
1153                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1154                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1155                         break;
1156                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1157                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1158                         break;
1159                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1160                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1161                         break;
1162                 default:
1163                         break;
1164                 }
1165         }
1166 #undef ADD_EVSEL_CONFIG
1167         return 0;
1168 }
1169
1170 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1171                                 const char *sys, const char *event,
1172                                 struct parse_events_error *err,
1173                                 struct list_head *head_config)
1174 {
1175         if (head_config) {
1176                 struct perf_event_attr attr;
1177
1178                 if (config_attr(&attr, head_config, err,
1179                                 config_term_tracepoint))
1180                         return -EINVAL;
1181         }
1182
1183         if (strpbrk(sys, "*?"))
1184                 return add_tracepoint_multi_sys(list, idx, sys, event,
1185                                                 err, head_config);
1186         else
1187                 return add_tracepoint_event(list, idx, sys, event,
1188                                             err, head_config);
1189 }
1190
1191 int parse_events_add_numeric(struct parse_events_state *parse_state,
1192                              struct list_head *list,
1193                              u32 type, u64 config,
1194                              struct list_head *head_config)
1195 {
1196         struct perf_event_attr attr;
1197         LIST_HEAD(config_terms);
1198
1199         memset(&attr, 0, sizeof(attr));
1200         attr.type = type;
1201         attr.config = config;
1202
1203         if (head_config) {
1204                 if (config_attr(&attr, head_config, parse_state->error,
1205                                 config_term_common))
1206                         return -EINVAL;
1207
1208                 if (get_config_terms(head_config, &config_terms))
1209                         return -ENOMEM;
1210         }
1211
1212         return add_event(list, &parse_state->idx, &attr,
1213                          get_config_name(head_config), &config_terms);
1214 }
1215
1216 static int __parse_events_add_pmu(struct parse_events_state *parse_state,
1217                          struct list_head *list, char *name,
1218                          struct list_head *head_config, bool auto_merge_stats)
1219 {
1220         struct perf_event_attr attr;
1221         struct perf_pmu_info info;
1222         struct perf_pmu *pmu;
1223         struct perf_evsel *evsel;
1224         LIST_HEAD(config_terms);
1225
1226         pmu = perf_pmu__find(name);
1227         if (!pmu)
1228                 return -EINVAL;
1229
1230         if (pmu->default_config) {
1231                 memcpy(&attr, pmu->default_config,
1232                        sizeof(struct perf_event_attr));
1233         } else {
1234                 memset(&attr, 0, sizeof(attr));
1235         }
1236
1237         if (!head_config) {
1238                 attr.type = pmu->type;
1239                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1240                 return evsel ? 0 : -ENOMEM;
1241         }
1242
1243         if (perf_pmu__check_alias(pmu, head_config, &info))
1244                 return -EINVAL;
1245
1246         /*
1247          * Configure hardcoded terms first, no need to check
1248          * return value when called with fail == 0 ;)
1249          */
1250         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1251                 return -EINVAL;
1252
1253         if (get_config_terms(head_config, &config_terms))
1254                 return -ENOMEM;
1255
1256         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1257                 struct perf_evsel_config_term *pos, *tmp;
1258
1259                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1260                         list_del_init(&pos->list);
1261                         free(pos);
1262                 }
1263                 return -EINVAL;
1264         }
1265
1266         evsel = __add_event(list, &parse_state->idx, &attr,
1267                             get_config_name(head_config), pmu,
1268                             &config_terms, auto_merge_stats);
1269         if (evsel) {
1270                 evsel->unit = info.unit;
1271                 evsel->scale = info.scale;
1272                 evsel->per_pkg = info.per_pkg;
1273                 evsel->snapshot = info.snapshot;
1274                 evsel->metric_expr = info.metric_expr;
1275                 evsel->metric_name = info.metric_name;
1276         }
1277
1278         return evsel ? 0 : -ENOMEM;
1279 }
1280
1281 int parse_events_add_pmu(struct parse_events_state *parse_state,
1282                          struct list_head *list, char *name,
1283                          struct list_head *head_config)
1284 {
1285         return __parse_events_add_pmu(parse_state, list, name, head_config, false);
1286 }
1287
1288 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1289                                char *str, struct list_head **listp)
1290 {
1291         struct list_head *head;
1292         struct parse_events_term *term;
1293         struct list_head *list;
1294         struct perf_pmu *pmu = NULL;
1295         int ok = 0;
1296
1297         *listp = NULL;
1298         /* Add it for all PMUs that support the alias */
1299         list = malloc(sizeof(struct list_head));
1300         if (!list)
1301                 return -1;
1302         INIT_LIST_HEAD(list);
1303         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1304                 struct perf_pmu_alias *alias;
1305
1306                 list_for_each_entry(alias, &pmu->aliases, list) {
1307                         if (!strcasecmp(alias->name, str)) {
1308                                 head = malloc(sizeof(struct list_head));
1309                                 if (!head)
1310                                         return -1;
1311                                 INIT_LIST_HEAD(head);
1312                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1313                                                            str, 1, false, &str, NULL) < 0)
1314                                         return -1;
1315                                 list_add_tail(&term->list, head);
1316
1317                                 if (!__parse_events_add_pmu(parse_state, list,
1318                                                             pmu->name, head, true)) {
1319                                         pr_debug("%s -> %s/%s/\n", str,
1320                                                  pmu->name, alias->str);
1321                                         ok++;
1322                                 }
1323
1324                                 parse_events_terms__delete(head);
1325                         }
1326                 }
1327         }
1328         if (!ok)
1329                 return -1;
1330         *listp = list;
1331         return 0;
1332 }
1333
1334 int parse_events__modifier_group(struct list_head *list,
1335                                  char *event_mod)
1336 {
1337         return parse_events__modifier_event(list, event_mod, true);
1338 }
1339
1340 void parse_events__set_leader(char *name, struct list_head *list)
1341 {
1342         struct perf_evsel *leader;
1343
1344         if (list_empty(list)) {
1345                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1346                 return;
1347         }
1348
1349         __perf_evlist__set_leader(list);
1350         leader = list_entry(list->next, struct perf_evsel, node);
1351         leader->group_name = name ? strdup(name) : NULL;
1352 }
1353
1354 /* list_event is assumed to point to malloc'ed memory */
1355 void parse_events_update_lists(struct list_head *list_event,
1356                                struct list_head *list_all)
1357 {
1358         /*
1359          * Called for single event definition. Update the
1360          * 'all event' list, and reinit the 'single event'
1361          * list, for next event definition.
1362          */
1363         list_splice_tail(list_event, list_all);
1364         free(list_event);
1365 }
1366
1367 struct event_modifier {
1368         int eu;
1369         int ek;
1370         int eh;
1371         int eH;
1372         int eG;
1373         int eI;
1374         int precise;
1375         int precise_max;
1376         int exclude_GH;
1377         int sample_read;
1378         int pinned;
1379 };
1380
1381 static int get_event_modifier(struct event_modifier *mod, char *str,
1382                                struct perf_evsel *evsel)
1383 {
1384         int eu = evsel ? evsel->attr.exclude_user : 0;
1385         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1386         int eh = evsel ? evsel->attr.exclude_hv : 0;
1387         int eH = evsel ? evsel->attr.exclude_host : 0;
1388         int eG = evsel ? evsel->attr.exclude_guest : 0;
1389         int eI = evsel ? evsel->attr.exclude_idle : 0;
1390         int precise = evsel ? evsel->attr.precise_ip : 0;
1391         int precise_max = 0;
1392         int sample_read = 0;
1393         int pinned = evsel ? evsel->attr.pinned : 0;
1394
1395         int exclude = eu | ek | eh;
1396         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1397
1398         memset(mod, 0, sizeof(*mod));
1399
1400         while (*str) {
1401                 if (*str == 'u') {
1402                         if (!exclude)
1403                                 exclude = eu = ek = eh = 1;
1404                         eu = 0;
1405                 } else if (*str == 'k') {
1406                         if (!exclude)
1407                                 exclude = eu = ek = eh = 1;
1408                         ek = 0;
1409                 } else if (*str == 'h') {
1410                         if (!exclude)
1411                                 exclude = eu = ek = eh = 1;
1412                         eh = 0;
1413                 } else if (*str == 'G') {
1414                         if (!exclude_GH)
1415                                 exclude_GH = eG = eH = 1;
1416                         eG = 0;
1417                 } else if (*str == 'H') {
1418                         if (!exclude_GH)
1419                                 exclude_GH = eG = eH = 1;
1420                         eH = 0;
1421                 } else if (*str == 'I') {
1422                         eI = 1;
1423                 } else if (*str == 'p') {
1424                         precise++;
1425                         /* use of precise requires exclude_guest */
1426                         if (!exclude_GH)
1427                                 eG = 1;
1428                 } else if (*str == 'P') {
1429                         precise_max = 1;
1430                 } else if (*str == 'S') {
1431                         sample_read = 1;
1432                 } else if (*str == 'D') {
1433                         pinned = 1;
1434                 } else
1435                         break;
1436
1437                 ++str;
1438         }
1439
1440         /*
1441          * precise ip:
1442          *
1443          *  0 - SAMPLE_IP can have arbitrary skid
1444          *  1 - SAMPLE_IP must have constant skid
1445          *  2 - SAMPLE_IP requested to have 0 skid
1446          *  3 - SAMPLE_IP must have 0 skid
1447          *
1448          *  See also PERF_RECORD_MISC_EXACT_IP
1449          */
1450         if (precise > 3)
1451                 return -EINVAL;
1452
1453         mod->eu = eu;
1454         mod->ek = ek;
1455         mod->eh = eh;
1456         mod->eH = eH;
1457         mod->eG = eG;
1458         mod->eI = eI;
1459         mod->precise = precise;
1460         mod->precise_max = precise_max;
1461         mod->exclude_GH = exclude_GH;
1462         mod->sample_read = sample_read;
1463         mod->pinned = pinned;
1464
1465         return 0;
1466 }
1467
1468 /*
1469  * Basic modifier sanity check to validate it contains only one
1470  * instance of any modifier (apart from 'p') present.
1471  */
1472 static int check_modifier(char *str)
1473 {
1474         char *p = str;
1475
1476         /* The sizeof includes 0 byte as well. */
1477         if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1478                 return -1;
1479
1480         while (*p) {
1481                 if (*p != 'p' && strchr(p + 1, *p))
1482                         return -1;
1483                 p++;
1484         }
1485
1486         return 0;
1487 }
1488
1489 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1490 {
1491         struct perf_evsel *evsel;
1492         struct event_modifier mod;
1493
1494         if (str == NULL)
1495                 return 0;
1496
1497         if (check_modifier(str))
1498                 return -EINVAL;
1499
1500         if (!add && get_event_modifier(&mod, str, NULL))
1501                 return -EINVAL;
1502
1503         __evlist__for_each_entry(list, evsel) {
1504                 if (add && get_event_modifier(&mod, str, evsel))
1505                         return -EINVAL;
1506
1507                 evsel->attr.exclude_user   = mod.eu;
1508                 evsel->attr.exclude_kernel = mod.ek;
1509                 evsel->attr.exclude_hv     = mod.eh;
1510                 evsel->attr.precise_ip     = mod.precise;
1511                 evsel->attr.exclude_host   = mod.eH;
1512                 evsel->attr.exclude_guest  = mod.eG;
1513                 evsel->attr.exclude_idle   = mod.eI;
1514                 evsel->exclude_GH          = mod.exclude_GH;
1515                 evsel->sample_read         = mod.sample_read;
1516                 evsel->precise_max         = mod.precise_max;
1517
1518                 if (perf_evsel__is_group_leader(evsel))
1519                         evsel->attr.pinned = mod.pinned;
1520         }
1521
1522         return 0;
1523 }
1524
1525 int parse_events_name(struct list_head *list, char *name)
1526 {
1527         struct perf_evsel *evsel;
1528
1529         __evlist__for_each_entry(list, evsel) {
1530                 if (!evsel->name)
1531                         evsel->name = strdup(name);
1532         }
1533
1534         return 0;
1535 }
1536
1537 static int
1538 comp_pmu(const void *p1, const void *p2)
1539 {
1540         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1541         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1542
1543         return strcasecmp(pmu1->symbol, pmu2->symbol);
1544 }
1545
1546 static void perf_pmu__parse_cleanup(void)
1547 {
1548         if (perf_pmu_events_list_num > 0) {
1549                 struct perf_pmu_event_symbol *p;
1550                 int i;
1551
1552                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1553                         p = perf_pmu_events_list + i;
1554                         zfree(&p->symbol);
1555                 }
1556                 zfree(&perf_pmu_events_list);
1557                 perf_pmu_events_list_num = 0;
1558         }
1559 }
1560
1561 #define SET_SYMBOL(str, stype)          \
1562 do {                                    \
1563         p->symbol = str;                \
1564         if (!p->symbol)                 \
1565                 goto err;               \
1566         p->type = stype;                \
1567 } while (0)
1568
1569 /*
1570  * Read the pmu events list from sysfs
1571  * Save it into perf_pmu_events_list
1572  */
1573 static void perf_pmu__parse_init(void)
1574 {
1575
1576         struct perf_pmu *pmu = NULL;
1577         struct perf_pmu_alias *alias;
1578         int len = 0;
1579
1580         pmu = NULL;
1581         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1582                 list_for_each_entry(alias, &pmu->aliases, list) {
1583                         if (strchr(alias->name, '-'))
1584                                 len++;
1585                         len++;
1586                 }
1587         }
1588
1589         if (len == 0) {
1590                 perf_pmu_events_list_num = -1;
1591                 return;
1592         }
1593         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1594         if (!perf_pmu_events_list)
1595                 return;
1596         perf_pmu_events_list_num = len;
1597
1598         len = 0;
1599         pmu = NULL;
1600         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1601                 list_for_each_entry(alias, &pmu->aliases, list) {
1602                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1603                         char *tmp = strchr(alias->name, '-');
1604
1605                         if (tmp != NULL) {
1606                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1607                                                 PMU_EVENT_SYMBOL_PREFIX);
1608                                 p++;
1609                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1610                                 len += 2;
1611                         } else {
1612                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1613                                 len++;
1614                         }
1615                 }
1616         }
1617         qsort(perf_pmu_events_list, len,
1618                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1619
1620         return;
1621 err:
1622         perf_pmu__parse_cleanup();
1623 }
1624
1625 enum perf_pmu_event_symbol_type
1626 perf_pmu__parse_check(const char *name)
1627 {
1628         struct perf_pmu_event_symbol p, *r;
1629
1630         /* scan kernel pmu events from sysfs if needed */
1631         if (perf_pmu_events_list_num == 0)
1632                 perf_pmu__parse_init();
1633         /*
1634          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1635          * cpu-cycles has been handled by hardcode.
1636          * So it must be cpu// events, not kernel pmu event.
1637          */
1638         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1639                 return PMU_EVENT_SYMBOL_ERR;
1640
1641         p.symbol = strdup(name);
1642         r = bsearch(&p, perf_pmu_events_list,
1643                         (size_t) perf_pmu_events_list_num,
1644                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1645         zfree(&p.symbol);
1646         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1647 }
1648
1649 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1650 {
1651         YY_BUFFER_STATE buffer;
1652         void *scanner;
1653         int ret;
1654
1655         ret = parse_events_lex_init_extra(start_token, &scanner);
1656         if (ret)
1657                 return ret;
1658
1659         buffer = parse_events__scan_string(str, scanner);
1660
1661 #ifdef PARSER_DEBUG
1662         parse_events_debug = 1;
1663 #endif
1664         ret = parse_events_parse(parse_state, scanner);
1665
1666         parse_events__flush_buffer(buffer, scanner);
1667         parse_events__delete_buffer(buffer, scanner);
1668         parse_events_lex_destroy(scanner);
1669         return ret;
1670 }
1671
1672 /*
1673  * parse event config string, return a list of event terms.
1674  */
1675 int parse_events_terms(struct list_head *terms, const char *str)
1676 {
1677         struct parse_events_state parse_state = {
1678                 .terms = NULL,
1679         };
1680         int ret;
1681
1682         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1683         if (!ret) {
1684                 list_splice(parse_state.terms, terms);
1685                 zfree(&parse_state.terms);
1686                 return 0;
1687         }
1688
1689         parse_events_terms__delete(parse_state.terms);
1690         return ret;
1691 }
1692
1693 int parse_events(struct perf_evlist *evlist, const char *str,
1694                  struct parse_events_error *err)
1695 {
1696         struct parse_events_state parse_state = {
1697                 .list   = LIST_HEAD_INIT(parse_state.list),
1698                 .idx    = evlist->nr_entries,
1699                 .error  = err,
1700                 .evlist = evlist,
1701         };
1702         int ret;
1703
1704         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1705         perf_pmu__parse_cleanup();
1706         if (!ret) {
1707                 struct perf_evsel *last;
1708
1709                 if (list_empty(&parse_state.list)) {
1710                         WARN_ONCE(true, "WARNING: event parser found nothing");
1711                         return -1;
1712                 }
1713
1714                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1715                 evlist->nr_groups += parse_state.nr_groups;
1716                 last = perf_evlist__last(evlist);
1717                 last->cmdline_group_boundary = true;
1718
1719                 return 0;
1720         }
1721
1722         /*
1723          * There are 2 users - builtin-record and builtin-test objects.
1724          * Both call perf_evlist__delete in case of error, so we dont
1725          * need to bother.
1726          */
1727         return ret;
1728 }
1729
1730 #define MAX_WIDTH 1000
1731 static int get_term_width(void)
1732 {
1733         struct winsize ws;
1734
1735         get_term_dimensions(&ws);
1736         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1737 }
1738
1739 static void parse_events_print_error(struct parse_events_error *err,
1740                                      const char *event)
1741 {
1742         const char *str = "invalid or unsupported event: ";
1743         char _buf[MAX_WIDTH];
1744         char *buf = (char *) event;
1745         int idx = 0;
1746
1747         if (err->str) {
1748                 /* -2 for extra '' in the final fprintf */
1749                 int width       = get_term_width() - 2;
1750                 int len_event   = strlen(event);
1751                 int len_str, max_len, cut = 0;
1752
1753                 /*
1754                  * Maximum error index indent, we will cut
1755                  * the event string if it's bigger.
1756                  */
1757                 int max_err_idx = 13;
1758
1759                 /*
1760                  * Let's be specific with the message when
1761                  * we have the precise error.
1762                  */
1763                 str     = "event syntax error: ";
1764                 len_str = strlen(str);
1765                 max_len = width - len_str;
1766
1767                 buf = _buf;
1768
1769                 /* We're cutting from the beginning. */
1770                 if (err->idx > max_err_idx)
1771                         cut = err->idx - max_err_idx;
1772
1773                 strncpy(buf, event + cut, max_len);
1774
1775                 /* Mark cut parts with '..' on both sides. */
1776                 if (cut)
1777                         buf[0] = buf[1] = '.';
1778
1779                 if ((len_event - cut) > max_len) {
1780                         buf[max_len - 1] = buf[max_len - 2] = '.';
1781                         buf[max_len] = 0;
1782                 }
1783
1784                 idx = len_str + err->idx - cut;
1785         }
1786
1787         fprintf(stderr, "%s'%s'\n", str, buf);
1788         if (idx) {
1789                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1790                 if (err->help)
1791                         fprintf(stderr, "\n%s\n", err->help);
1792                 zfree(&err->str);
1793                 zfree(&err->help);
1794         }
1795
1796         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1797 }
1798
1799 #undef MAX_WIDTH
1800
1801 int parse_events_option(const struct option *opt, const char *str,
1802                         int unset __maybe_unused)
1803 {
1804         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1805         struct parse_events_error err = { .idx = 0, };
1806         int ret = parse_events(evlist, str, &err);
1807
1808         if (ret)
1809                 parse_events_print_error(&err, str);
1810
1811         return ret;
1812 }
1813
1814 static int
1815 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1816                            int (*func)(struct perf_evsel *evsel,
1817                                        const void *arg),
1818                            const void *arg)
1819 {
1820         struct perf_evsel *last = NULL;
1821         int err;
1822
1823         /*
1824          * Don't return when list_empty, give func a chance to report
1825          * error when it found last == NULL.
1826          *
1827          * So no need to WARN here, let *func do this.
1828          */
1829         if (evlist->nr_entries > 0)
1830                 last = perf_evlist__last(evlist);
1831
1832         do {
1833                 err = (*func)(last, arg);
1834                 if (err)
1835                         return -1;
1836                 if (!last)
1837                         return 0;
1838
1839                 if (last->node.prev == &evlist->entries)
1840                         return 0;
1841                 last = list_entry(last->node.prev, struct perf_evsel, node);
1842         } while (!last->cmdline_group_boundary);
1843
1844         return 0;
1845 }
1846
1847 static int set_filter(struct perf_evsel *evsel, const void *arg)
1848 {
1849         const char *str = arg;
1850         bool found = false;
1851         int nr_addr_filters = 0;
1852         struct perf_pmu *pmu = NULL;
1853
1854         if (evsel == NULL)
1855                 goto err;
1856
1857         if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1858                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1859                         fprintf(stderr,
1860                                 "not enough memory to hold filter string\n");
1861                         return -1;
1862                 }
1863
1864                 return 0;
1865         }
1866
1867         while ((pmu = perf_pmu__scan(pmu)) != NULL)
1868                 if (pmu->type == evsel->attr.type) {
1869                         found = true;
1870                         break;
1871                 }
1872
1873         if (found)
1874                 perf_pmu__scan_file(pmu, "nr_addr_filters",
1875                                     "%d", &nr_addr_filters);
1876
1877         if (!nr_addr_filters)
1878                 goto err;
1879
1880         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1881                 fprintf(stderr,
1882                         "not enough memory to hold filter string\n");
1883                 return -1;
1884         }
1885
1886         return 0;
1887
1888 err:
1889         fprintf(stderr,
1890                 "--filter option should follow a -e tracepoint or HW tracer option\n");
1891
1892         return -1;
1893 }
1894
1895 int parse_filter(const struct option *opt, const char *str,
1896                  int unset __maybe_unused)
1897 {
1898         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1899
1900         return foreach_evsel_in_last_glob(evlist, set_filter,
1901                                           (const void *)str);
1902 }
1903
1904 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1905                                    const void *arg __maybe_unused)
1906 {
1907         char new_filter[64];
1908
1909         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1910                 fprintf(stderr,
1911                         "--exclude-perf option should follow a -e tracepoint option\n");
1912                 return -1;
1913         }
1914
1915         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1916
1917         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1918                 fprintf(stderr,
1919                         "not enough memory to hold filter string\n");
1920                 return -1;
1921         }
1922
1923         return 0;
1924 }
1925
1926 int exclude_perf(const struct option *opt,
1927                  const char *arg __maybe_unused,
1928                  int unset __maybe_unused)
1929 {
1930         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1931
1932         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1933                                           NULL);
1934 }
1935
1936 static const char * const event_type_descriptors[] = {
1937         "Hardware event",
1938         "Software event",
1939         "Tracepoint event",
1940         "Hardware cache event",
1941         "Raw hardware event descriptor",
1942         "Hardware breakpoint",
1943 };
1944
1945 static int cmp_string(const void *a, const void *b)
1946 {
1947         const char * const *as = a;
1948         const char * const *bs = b;
1949
1950         return strcmp(*as, *bs);
1951 }
1952
1953 /*
1954  * Print the events from <debugfs_mount_point>/tracing/events
1955  */
1956
1957 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1958                              bool name_only)
1959 {
1960         DIR *sys_dir, *evt_dir;
1961         struct dirent *sys_dirent, *evt_dirent;
1962         char evt_path[MAXPATHLEN];
1963         char dir_path[MAXPATHLEN];
1964         char **evt_list = NULL;
1965         unsigned int evt_i = 0, evt_num = 0;
1966         bool evt_num_known = false;
1967
1968 restart:
1969         sys_dir = opendir(tracing_events_path);
1970         if (!sys_dir)
1971                 return;
1972
1973         if (evt_num_known) {
1974                 evt_list = zalloc(sizeof(char *) * evt_num);
1975                 if (!evt_list)
1976                         goto out_close_sys_dir;
1977         }
1978
1979         for_each_subsystem(sys_dir, sys_dirent) {
1980                 if (subsys_glob != NULL &&
1981                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1982                         continue;
1983
1984                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1985                          sys_dirent->d_name);
1986                 evt_dir = opendir(dir_path);
1987                 if (!evt_dir)
1988                         continue;
1989
1990                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1991                         if (event_glob != NULL &&
1992                             !strglobmatch(evt_dirent->d_name, event_glob))
1993                                 continue;
1994
1995                         if (!evt_num_known) {
1996                                 evt_num++;
1997                                 continue;
1998                         }
1999
2000                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2001                                  sys_dirent->d_name, evt_dirent->d_name);
2002
2003                         evt_list[evt_i] = strdup(evt_path);
2004                         if (evt_list[evt_i] == NULL)
2005                                 goto out_close_evt_dir;
2006                         evt_i++;
2007                 }
2008                 closedir(evt_dir);
2009         }
2010         closedir(sys_dir);
2011
2012         if (!evt_num_known) {
2013                 evt_num_known = true;
2014                 goto restart;
2015         }
2016         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2017         evt_i = 0;
2018         while (evt_i < evt_num) {
2019                 if (name_only) {
2020                         printf("%s ", evt_list[evt_i++]);
2021                         continue;
2022                 }
2023                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2024                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2025         }
2026         if (evt_num && pager_in_use())
2027                 printf("\n");
2028
2029 out_free:
2030         evt_num = evt_i;
2031         for (evt_i = 0; evt_i < evt_num; evt_i++)
2032                 zfree(&evt_list[evt_i]);
2033         zfree(&evt_list);
2034         return;
2035
2036 out_close_evt_dir:
2037         closedir(evt_dir);
2038 out_close_sys_dir:
2039         closedir(sys_dir);
2040
2041         printf("FATAL: not enough memory to print %s\n",
2042                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2043         if (evt_list)
2044                 goto out_free;
2045 }
2046
2047 /*
2048  * Check whether event is in <debugfs_mount_point>/tracing/events
2049  */
2050
2051 int is_valid_tracepoint(const char *event_string)
2052 {
2053         DIR *sys_dir, *evt_dir;
2054         struct dirent *sys_dirent, *evt_dirent;
2055         char evt_path[MAXPATHLEN];
2056         char dir_path[MAXPATHLEN];
2057
2058         sys_dir = opendir(tracing_events_path);
2059         if (!sys_dir)
2060                 return 0;
2061
2062         for_each_subsystem(sys_dir, sys_dirent) {
2063
2064                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2065                          sys_dirent->d_name);
2066                 evt_dir = opendir(dir_path);
2067                 if (!evt_dir)
2068                         continue;
2069
2070                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2071                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2072                                  sys_dirent->d_name, evt_dirent->d_name);
2073                         if (!strcmp(evt_path, event_string)) {
2074                                 closedir(evt_dir);
2075                                 closedir(sys_dir);
2076                                 return 1;
2077                         }
2078                 }
2079                 closedir(evt_dir);
2080         }
2081         closedir(sys_dir);
2082         return 0;
2083 }
2084
2085 static bool is_event_supported(u8 type, unsigned config)
2086 {
2087         bool ret = true;
2088         int open_return;
2089         struct perf_evsel *evsel;
2090         struct perf_event_attr attr = {
2091                 .type = type,
2092                 .config = config,
2093                 .disabled = 1,
2094         };
2095         struct thread_map *tmap = thread_map__new_by_tid(0);
2096
2097         if (tmap == NULL)
2098                 return false;
2099
2100         evsel = perf_evsel__new(&attr);
2101         if (evsel) {
2102                 open_return = perf_evsel__open(evsel, NULL, tmap);
2103                 ret = open_return >= 0;
2104
2105                 if (open_return == -EACCES) {
2106                         /*
2107                          * This happens if the paranoid value
2108                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2109                          * Re-run with exclude_kernel set; we don't do that
2110                          * by default as some ARM machines do not support it.
2111                          *
2112                          */
2113                         evsel->attr.exclude_kernel = 1;
2114                         ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2115                 }
2116                 perf_evsel__delete(evsel);
2117         }
2118
2119         thread_map__put(tmap);
2120         return ret;
2121 }
2122
2123 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2124                       bool name_only)
2125 {
2126         struct probe_cache *pcache;
2127         struct probe_cache_entry *ent;
2128         struct strlist *bidlist, *sdtlist;
2129         struct strlist_config cfg = {.dont_dupstr = true};
2130         struct str_node *nd, *nd2;
2131         char *buf, *path, *ptr = NULL;
2132         bool show_detail = false;
2133         int ret;
2134
2135         sdtlist = strlist__new(NULL, &cfg);
2136         if (!sdtlist) {
2137                 pr_debug("Failed to allocate new strlist for SDT\n");
2138                 return;
2139         }
2140         bidlist = build_id_cache__list_all(true);
2141         if (!bidlist) {
2142                 pr_debug("Failed to get buildids: %d\n", errno);
2143                 return;
2144         }
2145         strlist__for_each_entry(nd, bidlist) {
2146                 pcache = probe_cache__new(nd->s, NULL);
2147                 if (!pcache)
2148                         continue;
2149                 list_for_each_entry(ent, &pcache->entries, node) {
2150                         if (!ent->sdt)
2151                                 continue;
2152                         if (subsys_glob &&
2153                             !strglobmatch(ent->pev.group, subsys_glob))
2154                                 continue;
2155                         if (event_glob &&
2156                             !strglobmatch(ent->pev.event, event_glob))
2157                                 continue;
2158                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2159                                         ent->pev.event, nd->s);
2160                         if (ret > 0)
2161                                 strlist__add(sdtlist, buf);
2162                 }
2163                 probe_cache__delete(pcache);
2164         }
2165         strlist__delete(bidlist);
2166
2167         strlist__for_each_entry(nd, sdtlist) {
2168                 buf = strchr(nd->s, '@');
2169                 if (buf)
2170                         *(buf++) = '\0';
2171                 if (name_only) {
2172                         printf("%s ", nd->s);
2173                         continue;
2174                 }
2175                 nd2 = strlist__next(nd);
2176                 if (nd2) {
2177                         ptr = strchr(nd2->s, '@');
2178                         if (ptr)
2179                                 *ptr = '\0';
2180                         if (strcmp(nd->s, nd2->s) == 0)
2181                                 show_detail = true;
2182                 }
2183                 if (show_detail) {
2184                         path = build_id_cache__origname(buf);
2185                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2186                         if (ret > 0) {
2187                                 printf("  %-50s [%s]\n", buf, "SDT event");
2188                                 free(buf);
2189                         }
2190                         free(path);
2191                 } else
2192                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2193                 if (nd2) {
2194                         if (strcmp(nd->s, nd2->s) != 0)
2195                                 show_detail = false;
2196                         if (ptr)
2197                                 *ptr = '@';
2198                 }
2199         }
2200         strlist__delete(sdtlist);
2201 }
2202
2203 int print_hwcache_events(const char *event_glob, bool name_only)
2204 {
2205         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2206         char name[64];
2207         char **evt_list = NULL;
2208         bool evt_num_known = false;
2209
2210 restart:
2211         if (evt_num_known) {
2212                 evt_list = zalloc(sizeof(char *) * evt_num);
2213                 if (!evt_list)
2214                         goto out_enomem;
2215         }
2216
2217         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2218                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2219                         /* skip invalid cache type */
2220                         if (!perf_evsel__is_cache_op_valid(type, op))
2221                                 continue;
2222
2223                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2224                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2225                                                                         name, sizeof(name));
2226                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2227                                         continue;
2228
2229                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2230                                                         type | (op << 8) | (i << 16)))
2231                                         continue;
2232
2233                                 if (!evt_num_known) {
2234                                         evt_num++;
2235                                         continue;
2236                                 }
2237
2238                                 evt_list[evt_i] = strdup(name);
2239                                 if (evt_list[evt_i] == NULL)
2240                                         goto out_enomem;
2241                                 evt_i++;
2242                         }
2243                 }
2244         }
2245
2246         if (!evt_num_known) {
2247                 evt_num_known = true;
2248                 goto restart;
2249         }
2250         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2251         evt_i = 0;
2252         while (evt_i < evt_num) {
2253                 if (name_only) {
2254                         printf("%s ", evt_list[evt_i++]);
2255                         continue;
2256                 }
2257                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2258                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2259         }
2260         if (evt_num && pager_in_use())
2261                 printf("\n");
2262
2263 out_free:
2264         evt_num = evt_i;
2265         for (evt_i = 0; evt_i < evt_num; evt_i++)
2266                 zfree(&evt_list[evt_i]);
2267         zfree(&evt_list);
2268         return evt_num;
2269
2270 out_enomem:
2271         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2272         if (evt_list)
2273                 goto out_free;
2274         return evt_num;
2275 }
2276
2277 void print_symbol_events(const char *event_glob, unsigned type,
2278                                 struct event_symbol *syms, unsigned max,
2279                                 bool name_only)
2280 {
2281         unsigned int i, evt_i = 0, evt_num = 0;
2282         char name[MAX_NAME_LEN];
2283         char **evt_list = NULL;
2284         bool evt_num_known = false;
2285
2286 restart:
2287         if (evt_num_known) {
2288                 evt_list = zalloc(sizeof(char *) * evt_num);
2289                 if (!evt_list)
2290                         goto out_enomem;
2291                 syms -= max;
2292         }
2293
2294         for (i = 0; i < max; i++, syms++) {
2295
2296                 if (event_glob != NULL && syms->symbol != NULL &&
2297                     !(strglobmatch(syms->symbol, event_glob) ||
2298                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2299                         continue;
2300
2301                 if (!is_event_supported(type, i))
2302                         continue;
2303
2304                 if (!evt_num_known) {
2305                         evt_num++;
2306                         continue;
2307                 }
2308
2309                 if (!name_only && strlen(syms->alias))
2310                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2311                 else
2312                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2313
2314                 evt_list[evt_i] = strdup(name);
2315                 if (evt_list[evt_i] == NULL)
2316                         goto out_enomem;
2317                 evt_i++;
2318         }
2319
2320         if (!evt_num_known) {
2321                 evt_num_known = true;
2322                 goto restart;
2323         }
2324         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2325         evt_i = 0;
2326         while (evt_i < evt_num) {
2327                 if (name_only) {
2328                         printf("%s ", evt_list[evt_i++]);
2329                         continue;
2330                 }
2331                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2332         }
2333         if (evt_num && pager_in_use())
2334                 printf("\n");
2335
2336 out_free:
2337         evt_num = evt_i;
2338         for (evt_i = 0; evt_i < evt_num; evt_i++)
2339                 zfree(&evt_list[evt_i]);
2340         zfree(&evt_list);
2341         return;
2342
2343 out_enomem:
2344         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2345         if (evt_list)
2346                 goto out_free;
2347 }
2348
2349 /*
2350  * Print the help text for the event symbols:
2351  */
2352 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2353                         bool long_desc, bool details_flag)
2354 {
2355         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2356                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2357
2358         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2359                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2360
2361         print_hwcache_events(event_glob, name_only);
2362
2363         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2364                         details_flag);
2365
2366         if (event_glob != NULL)
2367                 return;
2368
2369         if (!name_only) {
2370                 printf("  %-50s [%s]\n",
2371                        "rNNN",
2372                        event_type_descriptors[PERF_TYPE_RAW]);
2373                 printf("  %-50s [%s]\n",
2374                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2375                        event_type_descriptors[PERF_TYPE_RAW]);
2376                 if (pager_in_use())
2377                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2378
2379                 printf("  %-50s [%s]\n",
2380                        "mem:<addr>[/len][:access]",
2381                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2382                 if (pager_in_use())
2383                         printf("\n");
2384         }
2385
2386         print_tracepoint_events(NULL, NULL, name_only);
2387
2388         print_sdt_events(NULL, NULL, name_only);
2389 }
2390
2391 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2392 {
2393         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2394 }
2395
2396 static int new_term(struct parse_events_term **_term,
2397                     struct parse_events_term *temp,
2398                     char *str, u64 num)
2399 {
2400         struct parse_events_term *term;
2401
2402         term = malloc(sizeof(*term));
2403         if (!term)
2404                 return -ENOMEM;
2405
2406         *term = *temp;
2407         INIT_LIST_HEAD(&term->list);
2408         term->weak = false;
2409
2410         switch (term->type_val) {
2411         case PARSE_EVENTS__TERM_TYPE_NUM:
2412                 term->val.num = num;
2413                 break;
2414         case PARSE_EVENTS__TERM_TYPE_STR:
2415                 term->val.str = str;
2416                 break;
2417         default:
2418                 free(term);
2419                 return -EINVAL;
2420         }
2421
2422         *_term = term;
2423         return 0;
2424 }
2425
2426 int parse_events_term__num(struct parse_events_term **term,
2427                            int type_term, char *config, u64 num,
2428                            bool no_value,
2429                            void *loc_term_, void *loc_val_)
2430 {
2431         YYLTYPE *loc_term = loc_term_;
2432         YYLTYPE *loc_val = loc_val_;
2433
2434         struct parse_events_term temp = {
2435                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2436                 .type_term = type_term,
2437                 .config    = config,
2438                 .no_value  = no_value,
2439                 .err_term  = loc_term ? loc_term->first_column : 0,
2440                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2441         };
2442
2443         return new_term(term, &temp, NULL, num);
2444 }
2445
2446 int parse_events_term__str(struct parse_events_term **term,
2447                            int type_term, char *config, char *str,
2448                            void *loc_term_, void *loc_val_)
2449 {
2450         YYLTYPE *loc_term = loc_term_;
2451         YYLTYPE *loc_val = loc_val_;
2452
2453         struct parse_events_term temp = {
2454                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2455                 .type_term = type_term,
2456                 .config    = config,
2457                 .err_term  = loc_term ? loc_term->first_column : 0,
2458                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2459         };
2460
2461         return new_term(term, &temp, str, 0);
2462 }
2463
2464 int parse_events_term__sym_hw(struct parse_events_term **term,
2465                               char *config, unsigned idx)
2466 {
2467         struct event_symbol *sym;
2468         struct parse_events_term temp = {
2469                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2470                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2471                 .config    = config ?: (char *) "event",
2472         };
2473
2474         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2475         sym = &event_symbols_hw[idx];
2476
2477         return new_term(term, &temp, (char *) sym->symbol, 0);
2478 }
2479
2480 int parse_events_term__clone(struct parse_events_term **new,
2481                              struct parse_events_term *term)
2482 {
2483         struct parse_events_term temp = {
2484                 .type_val  = term->type_val,
2485                 .type_term = term->type_term,
2486                 .config    = term->config,
2487                 .err_term  = term->err_term,
2488                 .err_val   = term->err_val,
2489         };
2490
2491         return new_term(new, &temp, term->val.str, term->val.num);
2492 }
2493
2494 int parse_events_copy_term_list(struct list_head *old,
2495                                  struct list_head **new)
2496 {
2497         struct parse_events_term *term, *n;
2498         int ret;
2499
2500         if (!old) {
2501                 *new = NULL;
2502                 return 0;
2503         }
2504
2505         *new = malloc(sizeof(struct list_head));
2506         if (!*new)
2507                 return -ENOMEM;
2508         INIT_LIST_HEAD(*new);
2509
2510         list_for_each_entry (term, old, list) {
2511                 ret = parse_events_term__clone(&n, term);
2512                 if (ret)
2513                         return ret;
2514                 list_add_tail(&n->list, *new);
2515         }
2516         return 0;
2517 }
2518
2519 void parse_events_terms__purge(struct list_head *terms)
2520 {
2521         struct parse_events_term *term, *h;
2522
2523         list_for_each_entry_safe(term, h, terms, list) {
2524                 if (term->array.nr_ranges)
2525                         zfree(&term->array.ranges);
2526                 list_del_init(&term->list);
2527                 free(term);
2528         }
2529 }
2530
2531 void parse_events_terms__delete(struct list_head *terms)
2532 {
2533         if (!terms)
2534                 return;
2535         parse_events_terms__purge(terms);
2536         free(terms);
2537 }
2538
2539 void parse_events__clear_array(struct parse_events_array *a)
2540 {
2541         zfree(&a->ranges);
2542 }
2543
2544 void parse_events_evlist_error(struct parse_events_state *parse_state,
2545                                int idx, const char *str)
2546 {
2547         struct parse_events_error *err = parse_state->error;
2548
2549         if (!err)
2550                 return;
2551         err->idx = idx;
2552         err->str = strdup(str);
2553         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2554 }
2555
2556 static void config_terms_list(char *buf, size_t buf_sz)
2557 {
2558         int i;
2559         bool first = true;
2560
2561         buf[0] = '\0';
2562         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2563                 const char *name = config_term_names[i];
2564
2565                 if (!config_term_avail(i, NULL))
2566                         continue;
2567                 if (!name)
2568                         continue;
2569                 if (name[0] == '<')
2570                         continue;
2571
2572                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2573                         return;
2574
2575                 if (!first)
2576                         strcat(buf, ",");
2577                 else
2578                         first = false;
2579                 strcat(buf, name);
2580         }
2581 }
2582
2583 /*
2584  * Return string contains valid config terms of an event.
2585  * @additional_terms: For terms such as PMU sysfs terms.
2586  */
2587 char *parse_events_formats_error_string(char *additional_terms)
2588 {
2589         char *str;
2590         /* "no-overwrite" is the longest name */
2591         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2592                           (sizeof("no-overwrite") - 1)];
2593
2594         config_terms_list(static_terms, sizeof(static_terms));
2595         /* valid terms */
2596         if (additional_terms) {
2597                 if (asprintf(&str, "valid terms: %s,%s",
2598                              additional_terms, static_terms) < 0)
2599                         goto fail;
2600         } else {
2601                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2602                         goto fail;
2603         }
2604         return str;
2605
2606 fail:
2607         return NULL;
2608 }