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                 return -EINVAL;
1258
1259         evsel = __add_event(list, &parse_state->idx, &attr,
1260                             get_config_name(head_config), pmu,
1261                             &config_terms, auto_merge_stats);
1262         if (evsel) {
1263                 evsel->unit = info.unit;
1264                 evsel->scale = info.scale;
1265                 evsel->per_pkg = info.per_pkg;
1266                 evsel->snapshot = info.snapshot;
1267                 evsel->metric_expr = info.metric_expr;
1268                 evsel->metric_name = info.metric_name;
1269         }
1270
1271         return evsel ? 0 : -ENOMEM;
1272 }
1273
1274 int parse_events_add_pmu(struct parse_events_state *parse_state,
1275                          struct list_head *list, char *name,
1276                          struct list_head *head_config)
1277 {
1278         return __parse_events_add_pmu(parse_state, list, name, head_config, false);
1279 }
1280
1281 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1282                                char *str, struct list_head **listp)
1283 {
1284         struct list_head *head;
1285         struct parse_events_term *term;
1286         struct list_head *list;
1287         struct perf_pmu *pmu = NULL;
1288         int ok = 0;
1289
1290         *listp = NULL;
1291         /* Add it for all PMUs that support the alias */
1292         list = malloc(sizeof(struct list_head));
1293         if (!list)
1294                 return -1;
1295         INIT_LIST_HEAD(list);
1296         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1297                 struct perf_pmu_alias *alias;
1298
1299                 list_for_each_entry(alias, &pmu->aliases, list) {
1300                         if (!strcasecmp(alias->name, str)) {
1301                                 head = malloc(sizeof(struct list_head));
1302                                 if (!head)
1303                                         return -1;
1304                                 INIT_LIST_HEAD(head);
1305                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1306                                                            str, 1, false, &str, NULL) < 0)
1307                                         return -1;
1308                                 list_add_tail(&term->list, head);
1309
1310                                 if (!__parse_events_add_pmu(parse_state, list,
1311                                                             pmu->name, head, true)) {
1312                                         pr_debug("%s -> %s/%s/\n", str,
1313                                                  pmu->name, alias->str);
1314                                         ok++;
1315                                 }
1316
1317                                 parse_events_terms__delete(head);
1318                         }
1319                 }
1320         }
1321         if (!ok)
1322                 return -1;
1323         *listp = list;
1324         return 0;
1325 }
1326
1327 int parse_events__modifier_group(struct list_head *list,
1328                                  char *event_mod)
1329 {
1330         return parse_events__modifier_event(list, event_mod, true);
1331 }
1332
1333 void parse_events__set_leader(char *name, struct list_head *list)
1334 {
1335         struct perf_evsel *leader;
1336
1337         if (list_empty(list)) {
1338                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1339                 return;
1340         }
1341
1342         __perf_evlist__set_leader(list);
1343         leader = list_entry(list->next, struct perf_evsel, node);
1344         leader->group_name = name ? strdup(name) : NULL;
1345 }
1346
1347 /* list_event is assumed to point to malloc'ed memory */
1348 void parse_events_update_lists(struct list_head *list_event,
1349                                struct list_head *list_all)
1350 {
1351         /*
1352          * Called for single event definition. Update the
1353          * 'all event' list, and reinit the 'single event'
1354          * list, for next event definition.
1355          */
1356         list_splice_tail(list_event, list_all);
1357         free(list_event);
1358 }
1359
1360 struct event_modifier {
1361         int eu;
1362         int ek;
1363         int eh;
1364         int eH;
1365         int eG;
1366         int eI;
1367         int precise;
1368         int precise_max;
1369         int exclude_GH;
1370         int sample_read;
1371         int pinned;
1372 };
1373
1374 static int get_event_modifier(struct event_modifier *mod, char *str,
1375                                struct perf_evsel *evsel)
1376 {
1377         int eu = evsel ? evsel->attr.exclude_user : 0;
1378         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1379         int eh = evsel ? evsel->attr.exclude_hv : 0;
1380         int eH = evsel ? evsel->attr.exclude_host : 0;
1381         int eG = evsel ? evsel->attr.exclude_guest : 0;
1382         int eI = evsel ? evsel->attr.exclude_idle : 0;
1383         int precise = evsel ? evsel->attr.precise_ip : 0;
1384         int precise_max = 0;
1385         int sample_read = 0;
1386         int pinned = evsel ? evsel->attr.pinned : 0;
1387
1388         int exclude = eu | ek | eh;
1389         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1390
1391         memset(mod, 0, sizeof(*mod));
1392
1393         while (*str) {
1394                 if (*str == 'u') {
1395                         if (!exclude)
1396                                 exclude = eu = ek = eh = 1;
1397                         eu = 0;
1398                 } else if (*str == 'k') {
1399                         if (!exclude)
1400                                 exclude = eu = ek = eh = 1;
1401                         ek = 0;
1402                 } else if (*str == 'h') {
1403                         if (!exclude)
1404                                 exclude = eu = ek = eh = 1;
1405                         eh = 0;
1406                 } else if (*str == 'G') {
1407                         if (!exclude_GH)
1408                                 exclude_GH = eG = eH = 1;
1409                         eG = 0;
1410                 } else if (*str == 'H') {
1411                         if (!exclude_GH)
1412                                 exclude_GH = eG = eH = 1;
1413                         eH = 0;
1414                 } else if (*str == 'I') {
1415                         eI = 1;
1416                 } else if (*str == 'p') {
1417                         precise++;
1418                         /* use of precise requires exclude_guest */
1419                         if (!exclude_GH)
1420                                 eG = 1;
1421                 } else if (*str == 'P') {
1422                         precise_max = 1;
1423                 } else if (*str == 'S') {
1424                         sample_read = 1;
1425                 } else if (*str == 'D') {
1426                         pinned = 1;
1427                 } else
1428                         break;
1429
1430                 ++str;
1431         }
1432
1433         /*
1434          * precise ip:
1435          *
1436          *  0 - SAMPLE_IP can have arbitrary skid
1437          *  1 - SAMPLE_IP must have constant skid
1438          *  2 - SAMPLE_IP requested to have 0 skid
1439          *  3 - SAMPLE_IP must have 0 skid
1440          *
1441          *  See also PERF_RECORD_MISC_EXACT_IP
1442          */
1443         if (precise > 3)
1444                 return -EINVAL;
1445
1446         mod->eu = eu;
1447         mod->ek = ek;
1448         mod->eh = eh;
1449         mod->eH = eH;
1450         mod->eG = eG;
1451         mod->eI = eI;
1452         mod->precise = precise;
1453         mod->precise_max = precise_max;
1454         mod->exclude_GH = exclude_GH;
1455         mod->sample_read = sample_read;
1456         mod->pinned = pinned;
1457
1458         return 0;
1459 }
1460
1461 /*
1462  * Basic modifier sanity check to validate it contains only one
1463  * instance of any modifier (apart from 'p') present.
1464  */
1465 static int check_modifier(char *str)
1466 {
1467         char *p = str;
1468
1469         /* The sizeof includes 0 byte as well. */
1470         if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1471                 return -1;
1472
1473         while (*p) {
1474                 if (*p != 'p' && strchr(p + 1, *p))
1475                         return -1;
1476                 p++;
1477         }
1478
1479         return 0;
1480 }
1481
1482 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1483 {
1484         struct perf_evsel *evsel;
1485         struct event_modifier mod;
1486
1487         if (str == NULL)
1488                 return 0;
1489
1490         if (check_modifier(str))
1491                 return -EINVAL;
1492
1493         if (!add && get_event_modifier(&mod, str, NULL))
1494                 return -EINVAL;
1495
1496         __evlist__for_each_entry(list, evsel) {
1497                 if (add && get_event_modifier(&mod, str, evsel))
1498                         return -EINVAL;
1499
1500                 evsel->attr.exclude_user   = mod.eu;
1501                 evsel->attr.exclude_kernel = mod.ek;
1502                 evsel->attr.exclude_hv     = mod.eh;
1503                 evsel->attr.precise_ip     = mod.precise;
1504                 evsel->attr.exclude_host   = mod.eH;
1505                 evsel->attr.exclude_guest  = mod.eG;
1506                 evsel->attr.exclude_idle   = mod.eI;
1507                 evsel->exclude_GH          = mod.exclude_GH;
1508                 evsel->sample_read         = mod.sample_read;
1509                 evsel->precise_max         = mod.precise_max;
1510
1511                 if (perf_evsel__is_group_leader(evsel))
1512                         evsel->attr.pinned = mod.pinned;
1513         }
1514
1515         return 0;
1516 }
1517
1518 int parse_events_name(struct list_head *list, char *name)
1519 {
1520         struct perf_evsel *evsel;
1521
1522         __evlist__for_each_entry(list, evsel) {
1523                 if (!evsel->name)
1524                         evsel->name = strdup(name);
1525         }
1526
1527         return 0;
1528 }
1529
1530 static int
1531 comp_pmu(const void *p1, const void *p2)
1532 {
1533         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1534         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1535
1536         return strcasecmp(pmu1->symbol, pmu2->symbol);
1537 }
1538
1539 static void perf_pmu__parse_cleanup(void)
1540 {
1541         if (perf_pmu_events_list_num > 0) {
1542                 struct perf_pmu_event_symbol *p;
1543                 int i;
1544
1545                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1546                         p = perf_pmu_events_list + i;
1547                         zfree(&p->symbol);
1548                 }
1549                 zfree(&perf_pmu_events_list);
1550                 perf_pmu_events_list_num = 0;
1551         }
1552 }
1553
1554 #define SET_SYMBOL(str, stype)          \
1555 do {                                    \
1556         p->symbol = str;                \
1557         if (!p->symbol)                 \
1558                 goto err;               \
1559         p->type = stype;                \
1560 } while (0)
1561
1562 /*
1563  * Read the pmu events list from sysfs
1564  * Save it into perf_pmu_events_list
1565  */
1566 static void perf_pmu__parse_init(void)
1567 {
1568
1569         struct perf_pmu *pmu = NULL;
1570         struct perf_pmu_alias *alias;
1571         int len = 0;
1572
1573         pmu = NULL;
1574         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1575                 list_for_each_entry(alias, &pmu->aliases, list) {
1576                         if (strchr(alias->name, '-'))
1577                                 len++;
1578                         len++;
1579                 }
1580         }
1581
1582         if (len == 0) {
1583                 perf_pmu_events_list_num = -1;
1584                 return;
1585         }
1586         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1587         if (!perf_pmu_events_list)
1588                 return;
1589         perf_pmu_events_list_num = len;
1590
1591         len = 0;
1592         pmu = NULL;
1593         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1594                 list_for_each_entry(alias, &pmu->aliases, list) {
1595                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1596                         char *tmp = strchr(alias->name, '-');
1597
1598                         if (tmp != NULL) {
1599                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1600                                                 PMU_EVENT_SYMBOL_PREFIX);
1601                                 p++;
1602                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1603                                 len += 2;
1604                         } else {
1605                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1606                                 len++;
1607                         }
1608                 }
1609         }
1610         qsort(perf_pmu_events_list, len,
1611                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1612
1613         return;
1614 err:
1615         perf_pmu__parse_cleanup();
1616 }
1617
1618 enum perf_pmu_event_symbol_type
1619 perf_pmu__parse_check(const char *name)
1620 {
1621         struct perf_pmu_event_symbol p, *r;
1622
1623         /* scan kernel pmu events from sysfs if needed */
1624         if (perf_pmu_events_list_num == 0)
1625                 perf_pmu__parse_init();
1626         /*
1627          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1628          * cpu-cycles has been handled by hardcode.
1629          * So it must be cpu// events, not kernel pmu event.
1630          */
1631         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1632                 return PMU_EVENT_SYMBOL_ERR;
1633
1634         p.symbol = strdup(name);
1635         r = bsearch(&p, perf_pmu_events_list,
1636                         (size_t) perf_pmu_events_list_num,
1637                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1638         zfree(&p.symbol);
1639         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1640 }
1641
1642 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1643 {
1644         YY_BUFFER_STATE buffer;
1645         void *scanner;
1646         int ret;
1647
1648         ret = parse_events_lex_init_extra(start_token, &scanner);
1649         if (ret)
1650                 return ret;
1651
1652         buffer = parse_events__scan_string(str, scanner);
1653
1654 #ifdef PARSER_DEBUG
1655         parse_events_debug = 1;
1656 #endif
1657         ret = parse_events_parse(parse_state, scanner);
1658
1659         parse_events__flush_buffer(buffer, scanner);
1660         parse_events__delete_buffer(buffer, scanner);
1661         parse_events_lex_destroy(scanner);
1662         return ret;
1663 }
1664
1665 /*
1666  * parse event config string, return a list of event terms.
1667  */
1668 int parse_events_terms(struct list_head *terms, const char *str)
1669 {
1670         struct parse_events_state parse_state = {
1671                 .terms = NULL,
1672         };
1673         int ret;
1674
1675         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1676         if (!ret) {
1677                 list_splice(parse_state.terms, terms);
1678                 zfree(&parse_state.terms);
1679                 return 0;
1680         }
1681
1682         parse_events_terms__delete(parse_state.terms);
1683         return ret;
1684 }
1685
1686 int parse_events(struct perf_evlist *evlist, const char *str,
1687                  struct parse_events_error *err)
1688 {
1689         struct parse_events_state parse_state = {
1690                 .list   = LIST_HEAD_INIT(parse_state.list),
1691                 .idx    = evlist->nr_entries,
1692                 .error  = err,
1693                 .evlist = evlist,
1694         };
1695         int ret;
1696
1697         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1698         perf_pmu__parse_cleanup();
1699         if (!ret) {
1700                 struct perf_evsel *last;
1701
1702                 if (list_empty(&parse_state.list)) {
1703                         WARN_ONCE(true, "WARNING: event parser found nothing");
1704                         return -1;
1705                 }
1706
1707                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1708                 evlist->nr_groups += parse_state.nr_groups;
1709                 last = perf_evlist__last(evlist);
1710                 last->cmdline_group_boundary = true;
1711
1712                 return 0;
1713         }
1714
1715         /*
1716          * There are 2 users - builtin-record and builtin-test objects.
1717          * Both call perf_evlist__delete in case of error, so we dont
1718          * need to bother.
1719          */
1720         return ret;
1721 }
1722
1723 #define MAX_WIDTH 1000
1724 static int get_term_width(void)
1725 {
1726         struct winsize ws;
1727
1728         get_term_dimensions(&ws);
1729         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1730 }
1731
1732 static void parse_events_print_error(struct parse_events_error *err,
1733                                      const char *event)
1734 {
1735         const char *str = "invalid or unsupported event: ";
1736         char _buf[MAX_WIDTH];
1737         char *buf = (char *) event;
1738         int idx = 0;
1739
1740         if (err->str) {
1741                 /* -2 for extra '' in the final fprintf */
1742                 int width       = get_term_width() - 2;
1743                 int len_event   = strlen(event);
1744                 int len_str, max_len, cut = 0;
1745
1746                 /*
1747                  * Maximum error index indent, we will cut
1748                  * the event string if it's bigger.
1749                  */
1750                 int max_err_idx = 13;
1751
1752                 /*
1753                  * Let's be specific with the message when
1754                  * we have the precise error.
1755                  */
1756                 str     = "event syntax error: ";
1757                 len_str = strlen(str);
1758                 max_len = width - len_str;
1759
1760                 buf = _buf;
1761
1762                 /* We're cutting from the beginning. */
1763                 if (err->idx > max_err_idx)
1764                         cut = err->idx - max_err_idx;
1765
1766                 strncpy(buf, event + cut, max_len);
1767
1768                 /* Mark cut parts with '..' on both sides. */
1769                 if (cut)
1770                         buf[0] = buf[1] = '.';
1771
1772                 if ((len_event - cut) > max_len) {
1773                         buf[max_len - 1] = buf[max_len - 2] = '.';
1774                         buf[max_len] = 0;
1775                 }
1776
1777                 idx = len_str + err->idx - cut;
1778         }
1779
1780         fprintf(stderr, "%s'%s'\n", str, buf);
1781         if (idx) {
1782                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1783                 if (err->help)
1784                         fprintf(stderr, "\n%s\n", err->help);
1785                 zfree(&err->str);
1786                 zfree(&err->help);
1787         }
1788
1789         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1790 }
1791
1792 #undef MAX_WIDTH
1793
1794 int parse_events_option(const struct option *opt, const char *str,
1795                         int unset __maybe_unused)
1796 {
1797         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1798         struct parse_events_error err = { .idx = 0, };
1799         int ret = parse_events(evlist, str, &err);
1800
1801         if (ret)
1802                 parse_events_print_error(&err, str);
1803
1804         return ret;
1805 }
1806
1807 static int
1808 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1809                            int (*func)(struct perf_evsel *evsel,
1810                                        const void *arg),
1811                            const void *arg)
1812 {
1813         struct perf_evsel *last = NULL;
1814         int err;
1815
1816         /*
1817          * Don't return when list_empty, give func a chance to report
1818          * error when it found last == NULL.
1819          *
1820          * So no need to WARN here, let *func do this.
1821          */
1822         if (evlist->nr_entries > 0)
1823                 last = perf_evlist__last(evlist);
1824
1825         do {
1826                 err = (*func)(last, arg);
1827                 if (err)
1828                         return -1;
1829                 if (!last)
1830                         return 0;
1831
1832                 if (last->node.prev == &evlist->entries)
1833                         return 0;
1834                 last = list_entry(last->node.prev, struct perf_evsel, node);
1835         } while (!last->cmdline_group_boundary);
1836
1837         return 0;
1838 }
1839
1840 static int set_filter(struct perf_evsel *evsel, const void *arg)
1841 {
1842         const char *str = arg;
1843         bool found = false;
1844         int nr_addr_filters = 0;
1845         struct perf_pmu *pmu = NULL;
1846
1847         if (evsel == NULL)
1848                 goto err;
1849
1850         if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1851                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1852                         fprintf(stderr,
1853                                 "not enough memory to hold filter string\n");
1854                         return -1;
1855                 }
1856
1857                 return 0;
1858         }
1859
1860         while ((pmu = perf_pmu__scan(pmu)) != NULL)
1861                 if (pmu->type == evsel->attr.type) {
1862                         found = true;
1863                         break;
1864                 }
1865
1866         if (found)
1867                 perf_pmu__scan_file(pmu, "nr_addr_filters",
1868                                     "%d", &nr_addr_filters);
1869
1870         if (!nr_addr_filters)
1871                 goto err;
1872
1873         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1874                 fprintf(stderr,
1875                         "not enough memory to hold filter string\n");
1876                 return -1;
1877         }
1878
1879         return 0;
1880
1881 err:
1882         fprintf(stderr,
1883                 "--filter option should follow a -e tracepoint or HW tracer option\n");
1884
1885         return -1;
1886 }
1887
1888 int parse_filter(const struct option *opt, const char *str,
1889                  int unset __maybe_unused)
1890 {
1891         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1892
1893         return foreach_evsel_in_last_glob(evlist, set_filter,
1894                                           (const void *)str);
1895 }
1896
1897 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1898                                    const void *arg __maybe_unused)
1899 {
1900         char new_filter[64];
1901
1902         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1903                 fprintf(stderr,
1904                         "--exclude-perf option should follow a -e tracepoint option\n");
1905                 return -1;
1906         }
1907
1908         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1909
1910         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1911                 fprintf(stderr,
1912                         "not enough memory to hold filter string\n");
1913                 return -1;
1914         }
1915
1916         return 0;
1917 }
1918
1919 int exclude_perf(const struct option *opt,
1920                  const char *arg __maybe_unused,
1921                  int unset __maybe_unused)
1922 {
1923         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1924
1925         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1926                                           NULL);
1927 }
1928
1929 static const char * const event_type_descriptors[] = {
1930         "Hardware event",
1931         "Software event",
1932         "Tracepoint event",
1933         "Hardware cache event",
1934         "Raw hardware event descriptor",
1935         "Hardware breakpoint",
1936 };
1937
1938 static int cmp_string(const void *a, const void *b)
1939 {
1940         const char * const *as = a;
1941         const char * const *bs = b;
1942
1943         return strcmp(*as, *bs);
1944 }
1945
1946 /*
1947  * Print the events from <debugfs_mount_point>/tracing/events
1948  */
1949
1950 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1951                              bool name_only)
1952 {
1953         DIR *sys_dir, *evt_dir;
1954         struct dirent *sys_dirent, *evt_dirent;
1955         char evt_path[MAXPATHLEN];
1956         char dir_path[MAXPATHLEN];
1957         char **evt_list = NULL;
1958         unsigned int evt_i = 0, evt_num = 0;
1959         bool evt_num_known = false;
1960
1961 restart:
1962         sys_dir = opendir(tracing_events_path);
1963         if (!sys_dir)
1964                 return;
1965
1966         if (evt_num_known) {
1967                 evt_list = zalloc(sizeof(char *) * evt_num);
1968                 if (!evt_list)
1969                         goto out_close_sys_dir;
1970         }
1971
1972         for_each_subsystem(sys_dir, sys_dirent) {
1973                 if (subsys_glob != NULL &&
1974                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1975                         continue;
1976
1977                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1978                          sys_dirent->d_name);
1979                 evt_dir = opendir(dir_path);
1980                 if (!evt_dir)
1981                         continue;
1982
1983                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1984                         if (event_glob != NULL &&
1985                             !strglobmatch(evt_dirent->d_name, event_glob))
1986                                 continue;
1987
1988                         if (!evt_num_known) {
1989                                 evt_num++;
1990                                 continue;
1991                         }
1992
1993                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1994                                  sys_dirent->d_name, evt_dirent->d_name);
1995
1996                         evt_list[evt_i] = strdup(evt_path);
1997                         if (evt_list[evt_i] == NULL)
1998                                 goto out_close_evt_dir;
1999                         evt_i++;
2000                 }
2001                 closedir(evt_dir);
2002         }
2003         closedir(sys_dir);
2004
2005         if (!evt_num_known) {
2006                 evt_num_known = true;
2007                 goto restart;
2008         }
2009         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2010         evt_i = 0;
2011         while (evt_i < evt_num) {
2012                 if (name_only) {
2013                         printf("%s ", evt_list[evt_i++]);
2014                         continue;
2015                 }
2016                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2017                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2018         }
2019         if (evt_num && pager_in_use())
2020                 printf("\n");
2021
2022 out_free:
2023         evt_num = evt_i;
2024         for (evt_i = 0; evt_i < evt_num; evt_i++)
2025                 zfree(&evt_list[evt_i]);
2026         zfree(&evt_list);
2027         return;
2028
2029 out_close_evt_dir:
2030         closedir(evt_dir);
2031 out_close_sys_dir:
2032         closedir(sys_dir);
2033
2034         printf("FATAL: not enough memory to print %s\n",
2035                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2036         if (evt_list)
2037                 goto out_free;
2038 }
2039
2040 /*
2041  * Check whether event is in <debugfs_mount_point>/tracing/events
2042  */
2043
2044 int is_valid_tracepoint(const char *event_string)
2045 {
2046         DIR *sys_dir, *evt_dir;
2047         struct dirent *sys_dirent, *evt_dirent;
2048         char evt_path[MAXPATHLEN];
2049         char dir_path[MAXPATHLEN];
2050
2051         sys_dir = opendir(tracing_events_path);
2052         if (!sys_dir)
2053                 return 0;
2054
2055         for_each_subsystem(sys_dir, sys_dirent) {
2056
2057                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2058                          sys_dirent->d_name);
2059                 evt_dir = opendir(dir_path);
2060                 if (!evt_dir)
2061                         continue;
2062
2063                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2064                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2065                                  sys_dirent->d_name, evt_dirent->d_name);
2066                         if (!strcmp(evt_path, event_string)) {
2067                                 closedir(evt_dir);
2068                                 closedir(sys_dir);
2069                                 return 1;
2070                         }
2071                 }
2072                 closedir(evt_dir);
2073         }
2074         closedir(sys_dir);
2075         return 0;
2076 }
2077
2078 static bool is_event_supported(u8 type, unsigned config)
2079 {
2080         bool ret = true;
2081         int open_return;
2082         struct perf_evsel *evsel;
2083         struct perf_event_attr attr = {
2084                 .type = type,
2085                 .config = config,
2086                 .disabled = 1,
2087         };
2088         struct thread_map *tmap = thread_map__new_by_tid(0);
2089
2090         if (tmap == NULL)
2091                 return false;
2092
2093         evsel = perf_evsel__new(&attr);
2094         if (evsel) {
2095                 open_return = perf_evsel__open(evsel, NULL, tmap);
2096                 ret = open_return >= 0;
2097
2098                 if (open_return == -EACCES) {
2099                         /*
2100                          * This happens if the paranoid value
2101                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2102                          * Re-run with exclude_kernel set; we don't do that
2103                          * by default as some ARM machines do not support it.
2104                          *
2105                          */
2106                         evsel->attr.exclude_kernel = 1;
2107                         ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2108                 }
2109                 perf_evsel__delete(evsel);
2110         }
2111
2112         return ret;
2113 }
2114
2115 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2116                       bool name_only)
2117 {
2118         struct probe_cache *pcache;
2119         struct probe_cache_entry *ent;
2120         struct strlist *bidlist, *sdtlist;
2121         struct strlist_config cfg = {.dont_dupstr = true};
2122         struct str_node *nd, *nd2;
2123         char *buf, *path, *ptr = NULL;
2124         bool show_detail = false;
2125         int ret;
2126
2127         sdtlist = strlist__new(NULL, &cfg);
2128         if (!sdtlist) {
2129                 pr_debug("Failed to allocate new strlist for SDT\n");
2130                 return;
2131         }
2132         bidlist = build_id_cache__list_all(true);
2133         if (!bidlist) {
2134                 pr_debug("Failed to get buildids: %d\n", errno);
2135                 return;
2136         }
2137         strlist__for_each_entry(nd, bidlist) {
2138                 pcache = probe_cache__new(nd->s, NULL);
2139                 if (!pcache)
2140                         continue;
2141                 list_for_each_entry(ent, &pcache->entries, node) {
2142                         if (!ent->sdt)
2143                                 continue;
2144                         if (subsys_glob &&
2145                             !strglobmatch(ent->pev.group, subsys_glob))
2146                                 continue;
2147                         if (event_glob &&
2148                             !strglobmatch(ent->pev.event, event_glob))
2149                                 continue;
2150                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2151                                         ent->pev.event, nd->s);
2152                         if (ret > 0)
2153                                 strlist__add(sdtlist, buf);
2154                 }
2155                 probe_cache__delete(pcache);
2156         }
2157         strlist__delete(bidlist);
2158
2159         strlist__for_each_entry(nd, sdtlist) {
2160                 buf = strchr(nd->s, '@');
2161                 if (buf)
2162                         *(buf++) = '\0';
2163                 if (name_only) {
2164                         printf("%s ", nd->s);
2165                         continue;
2166                 }
2167                 nd2 = strlist__next(nd);
2168                 if (nd2) {
2169                         ptr = strchr(nd2->s, '@');
2170                         if (ptr)
2171                                 *ptr = '\0';
2172                         if (strcmp(nd->s, nd2->s) == 0)
2173                                 show_detail = true;
2174                 }
2175                 if (show_detail) {
2176                         path = build_id_cache__origname(buf);
2177                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2178                         if (ret > 0) {
2179                                 printf("  %-50s [%s]\n", buf, "SDT event");
2180                                 free(buf);
2181                         }
2182                 } else
2183                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2184                 if (nd2) {
2185                         if (strcmp(nd->s, nd2->s) != 0)
2186                                 show_detail = false;
2187                         if (ptr)
2188                                 *ptr = '@';
2189                 }
2190         }
2191         strlist__delete(sdtlist);
2192 }
2193
2194 int print_hwcache_events(const char *event_glob, bool name_only)
2195 {
2196         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2197         char name[64];
2198         char **evt_list = NULL;
2199         bool evt_num_known = false;
2200
2201 restart:
2202         if (evt_num_known) {
2203                 evt_list = zalloc(sizeof(char *) * evt_num);
2204                 if (!evt_list)
2205                         goto out_enomem;
2206         }
2207
2208         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2209                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2210                         /* skip invalid cache type */
2211                         if (!perf_evsel__is_cache_op_valid(type, op))
2212                                 continue;
2213
2214                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2215                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2216                                                                         name, sizeof(name));
2217                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2218                                         continue;
2219
2220                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2221                                                         type | (op << 8) | (i << 16)))
2222                                         continue;
2223
2224                                 if (!evt_num_known) {
2225                                         evt_num++;
2226                                         continue;
2227                                 }
2228
2229                                 evt_list[evt_i] = strdup(name);
2230                                 if (evt_list[evt_i] == NULL)
2231                                         goto out_enomem;
2232                                 evt_i++;
2233                         }
2234                 }
2235         }
2236
2237         if (!evt_num_known) {
2238                 evt_num_known = true;
2239                 goto restart;
2240         }
2241         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2242         evt_i = 0;
2243         while (evt_i < evt_num) {
2244                 if (name_only) {
2245                         printf("%s ", evt_list[evt_i++]);
2246                         continue;
2247                 }
2248                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2249                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2250         }
2251         if (evt_num && pager_in_use())
2252                 printf("\n");
2253
2254 out_free:
2255         evt_num = evt_i;
2256         for (evt_i = 0; evt_i < evt_num; evt_i++)
2257                 zfree(&evt_list[evt_i]);
2258         zfree(&evt_list);
2259         return evt_num;
2260
2261 out_enomem:
2262         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2263         if (evt_list)
2264                 goto out_free;
2265         return evt_num;
2266 }
2267
2268 void print_symbol_events(const char *event_glob, unsigned type,
2269                                 struct event_symbol *syms, unsigned max,
2270                                 bool name_only)
2271 {
2272         unsigned int i, evt_i = 0, evt_num = 0;
2273         char name[MAX_NAME_LEN];
2274         char **evt_list = NULL;
2275         bool evt_num_known = false;
2276
2277 restart:
2278         if (evt_num_known) {
2279                 evt_list = zalloc(sizeof(char *) * evt_num);
2280                 if (!evt_list)
2281                         goto out_enomem;
2282                 syms -= max;
2283         }
2284
2285         for (i = 0; i < max; i++, syms++) {
2286
2287                 if (event_glob != NULL && syms->symbol != NULL &&
2288                     !(strglobmatch(syms->symbol, event_glob) ||
2289                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2290                         continue;
2291
2292                 if (!is_event_supported(type, i))
2293                         continue;
2294
2295                 if (!evt_num_known) {
2296                         evt_num++;
2297                         continue;
2298                 }
2299
2300                 if (!name_only && strlen(syms->alias))
2301                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2302                 else
2303                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2304
2305                 evt_list[evt_i] = strdup(name);
2306                 if (evt_list[evt_i] == NULL)
2307                         goto out_enomem;
2308                 evt_i++;
2309         }
2310
2311         if (!evt_num_known) {
2312                 evt_num_known = true;
2313                 goto restart;
2314         }
2315         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2316         evt_i = 0;
2317         while (evt_i < evt_num) {
2318                 if (name_only) {
2319                         printf("%s ", evt_list[evt_i++]);
2320                         continue;
2321                 }
2322                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2323         }
2324         if (evt_num && pager_in_use())
2325                 printf("\n");
2326
2327 out_free:
2328         evt_num = evt_i;
2329         for (evt_i = 0; evt_i < evt_num; evt_i++)
2330                 zfree(&evt_list[evt_i]);
2331         zfree(&evt_list);
2332         return;
2333
2334 out_enomem:
2335         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2336         if (evt_list)
2337                 goto out_free;
2338 }
2339
2340 /*
2341  * Print the help text for the event symbols:
2342  */
2343 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2344                         bool long_desc, bool details_flag)
2345 {
2346         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2347                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2348
2349         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2350                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2351
2352         print_hwcache_events(event_glob, name_only);
2353
2354         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2355                         details_flag);
2356
2357         if (event_glob != NULL)
2358                 return;
2359
2360         if (!name_only) {
2361                 printf("  %-50s [%s]\n",
2362                        "rNNN",
2363                        event_type_descriptors[PERF_TYPE_RAW]);
2364                 printf("  %-50s [%s]\n",
2365                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2366                        event_type_descriptors[PERF_TYPE_RAW]);
2367                 if (pager_in_use())
2368                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2369
2370                 printf("  %-50s [%s]\n",
2371                        "mem:<addr>[/len][:access]",
2372                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2373                 if (pager_in_use())
2374                         printf("\n");
2375         }
2376
2377         print_tracepoint_events(NULL, NULL, name_only);
2378
2379         print_sdt_events(NULL, NULL, name_only);
2380 }
2381
2382 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2383 {
2384         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2385 }
2386
2387 static int new_term(struct parse_events_term **_term,
2388                     struct parse_events_term *temp,
2389                     char *str, u64 num)
2390 {
2391         struct parse_events_term *term;
2392
2393         term = malloc(sizeof(*term));
2394         if (!term)
2395                 return -ENOMEM;
2396
2397         *term = *temp;
2398         INIT_LIST_HEAD(&term->list);
2399         term->weak = false;
2400
2401         switch (term->type_val) {
2402         case PARSE_EVENTS__TERM_TYPE_NUM:
2403                 term->val.num = num;
2404                 break;
2405         case PARSE_EVENTS__TERM_TYPE_STR:
2406                 term->val.str = str;
2407                 break;
2408         default:
2409                 free(term);
2410                 return -EINVAL;
2411         }
2412
2413         *_term = term;
2414         return 0;
2415 }
2416
2417 int parse_events_term__num(struct parse_events_term **term,
2418                            int type_term, char *config, u64 num,
2419                            bool no_value,
2420                            void *loc_term_, void *loc_val_)
2421 {
2422         YYLTYPE *loc_term = loc_term_;
2423         YYLTYPE *loc_val = loc_val_;
2424
2425         struct parse_events_term temp = {
2426                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2427                 .type_term = type_term,
2428                 .config    = config,
2429                 .no_value  = no_value,
2430                 .err_term  = loc_term ? loc_term->first_column : 0,
2431                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2432         };
2433
2434         return new_term(term, &temp, NULL, num);
2435 }
2436
2437 int parse_events_term__str(struct parse_events_term **term,
2438                            int type_term, char *config, char *str,
2439                            void *loc_term_, void *loc_val_)
2440 {
2441         YYLTYPE *loc_term = loc_term_;
2442         YYLTYPE *loc_val = loc_val_;
2443
2444         struct parse_events_term temp = {
2445                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2446                 .type_term = type_term,
2447                 .config    = config,
2448                 .err_term  = loc_term ? loc_term->first_column : 0,
2449                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2450         };
2451
2452         return new_term(term, &temp, str, 0);
2453 }
2454
2455 int parse_events_term__sym_hw(struct parse_events_term **term,
2456                               char *config, unsigned idx)
2457 {
2458         struct event_symbol *sym;
2459         struct parse_events_term temp = {
2460                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2461                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2462                 .config    = config ?: (char *) "event",
2463         };
2464
2465         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2466         sym = &event_symbols_hw[idx];
2467
2468         return new_term(term, &temp, (char *) sym->symbol, 0);
2469 }
2470
2471 int parse_events_term__clone(struct parse_events_term **new,
2472                              struct parse_events_term *term)
2473 {
2474         struct parse_events_term temp = {
2475                 .type_val  = term->type_val,
2476                 .type_term = term->type_term,
2477                 .config    = term->config,
2478                 .err_term  = term->err_term,
2479                 .err_val   = term->err_val,
2480         };
2481
2482         return new_term(new, &temp, term->val.str, term->val.num);
2483 }
2484
2485 int parse_events_copy_term_list(struct list_head *old,
2486                                  struct list_head **new)
2487 {
2488         struct parse_events_term *term, *n;
2489         int ret;
2490
2491         if (!old) {
2492                 *new = NULL;
2493                 return 0;
2494         }
2495
2496         *new = malloc(sizeof(struct list_head));
2497         if (!*new)
2498                 return -ENOMEM;
2499         INIT_LIST_HEAD(*new);
2500
2501         list_for_each_entry (term, old, list) {
2502                 ret = parse_events_term__clone(&n, term);
2503                 if (ret)
2504                         return ret;
2505                 list_add_tail(&n->list, *new);
2506         }
2507         return 0;
2508 }
2509
2510 void parse_events_terms__purge(struct list_head *terms)
2511 {
2512         struct parse_events_term *term, *h;
2513
2514         list_for_each_entry_safe(term, h, terms, list) {
2515                 if (term->array.nr_ranges)
2516                         zfree(&term->array.ranges);
2517                 list_del_init(&term->list);
2518                 free(term);
2519         }
2520 }
2521
2522 void parse_events_terms__delete(struct list_head *terms)
2523 {
2524         if (!terms)
2525                 return;
2526         parse_events_terms__purge(terms);
2527         free(terms);
2528 }
2529
2530 void parse_events__clear_array(struct parse_events_array *a)
2531 {
2532         zfree(&a->ranges);
2533 }
2534
2535 void parse_events_evlist_error(struct parse_events_state *parse_state,
2536                                int idx, const char *str)
2537 {
2538         struct parse_events_error *err = parse_state->error;
2539
2540         if (!err)
2541                 return;
2542         err->idx = idx;
2543         err->str = strdup(str);
2544         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2545 }
2546
2547 static void config_terms_list(char *buf, size_t buf_sz)
2548 {
2549         int i;
2550         bool first = true;
2551
2552         buf[0] = '\0';
2553         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2554                 const char *name = config_term_names[i];
2555
2556                 if (!config_term_avail(i, NULL))
2557                         continue;
2558                 if (!name)
2559                         continue;
2560                 if (name[0] == '<')
2561                         continue;
2562
2563                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2564                         return;
2565
2566                 if (!first)
2567                         strcat(buf, ",");
2568                 else
2569                         first = false;
2570                 strcat(buf, name);
2571         }
2572 }
2573
2574 /*
2575  * Return string contains valid config terms of an event.
2576  * @additional_terms: For terms such as PMU sysfs terms.
2577  */
2578 char *parse_events_formats_error_string(char *additional_terms)
2579 {
2580         char *str;
2581         /* "no-overwrite" is the longest name */
2582         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2583                           (sizeof("no-overwrite") - 1)];
2584
2585         config_terms_list(static_terms, sizeof(static_terms));
2586         /* valid terms */
2587         if (additional_terms) {
2588                 if (asprintf(&str, "valid terms: %s,%s",
2589                              additional_terms, static_terms) < 0)
2590                         goto fail;
2591         } else {
2592                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2593                         goto fail;
2594         }
2595         return str;
2596
2597 fail:
2598         return NULL;
2599 }