tools/perf/util/parse-events.c

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