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 };
 908
 909 static bool config_term_shrinked;
 910
 911 static bool
 912 config_term_avail(int term_type, struct parse_events_error *err)
 913 {
 914         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 915                 err->str = strdup("Invalid term_type");
 916                 return false;
 917         }
 918         if (!config_term_shrinked)
 919                 return true;
 920
 921         switch (term_type) {
 922         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 923         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 924         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 925         case PARSE_EVENTS__TERM_TYPE_NAME:
 926                 return true;
 927         default:
 928                 if (!err)
 929                         return false;
 930
 931                 /* term_type is validated so indexing is safe */
 932                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 933                              config_term_names[term_type]) < 0)
 934                         err->str = NULL;
 935                 return false;
 936         }
 937 }
 938
 939 void parse_events__shrink_config_terms(void)
 940 {
 941         config_term_shrinked = true;
 942 }
 943
 944 static int config_term_common(struct perf_event_attr *attr,
 945                               struct parse_events_term *term,
 946                               struct parse_events_error *err)
 947 {
 948 #define CHECK_TYPE_VAL(type)                                               \
 949 do {                                                                       \
 950         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 951                 return -EINVAL;                                            \
 952 } while (0)
 953
 954         switch (term->type_term) {
 955         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 956                 CHECK_TYPE_VAL(NUM);
 957                 attr->config = term->val.num;
 958                 break;
 959         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 960                 CHECK_TYPE_VAL(NUM);
 961                 attr->config1 = term->val.num;
 962                 break;
 963         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 964                 CHECK_TYPE_VAL(NUM);
 965                 attr->config2 = term->val.num;
 966                 break;
 967         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 968                 CHECK_TYPE_VAL(NUM);
 969                 break;
 970         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 971                 CHECK_TYPE_VAL(NUM);
 972                 break;
 973         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 974                 /*
 975                  * TODO uncomment when the field is available
 976                  * attr->branch_sample_type = term->val.num;
 977                  */
 978                 break;
 979         case PARSE_EVENTS__TERM_TYPE_TIME:
 980                 CHECK_TYPE_VAL(NUM);
 981                 if (term->val.num > 1) {
 982                         err->str = strdup("expected 0 or 1");
 983                         err->idx = term->err_val;
 984                         return -EINVAL;
 985                 }
 986                 break;
 987         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
 988                 CHECK_TYPE_VAL(STR);
 989                 break;
 990         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
 991                 CHECK_TYPE_VAL(NUM);
 992                 break;
 993         case PARSE_EVENTS__TERM_TYPE_INHERIT:
 994                 CHECK_TYPE_VAL(NUM);
 995                 break;
 996         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
 997                 CHECK_TYPE_VAL(NUM);
 998                 break;
 999         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1000                 CHECK_TYPE_VAL(NUM);
1001                 break;
1002         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1003                 CHECK_TYPE_VAL(NUM);
1004                 break;
1005         case PARSE_EVENTS__TERM_TYPE_NAME:
1006                 CHECK_TYPE_VAL(STR);
1007                 break;
1008         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1009                 CHECK_TYPE_VAL(NUM);
1010                 break;
1011         default:
1012                 err->str = strdup("unknown term");
1013                 err->idx = term->err_term;
1014                 err->help = parse_events_formats_error_string(NULL);
1015                 return -EINVAL;
1016         }
1017
1018         /*
1019          * Check term availbility after basic checking so
1020          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1021          *
1022          * If check availbility at the entry of this function,
1023          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1024          * if an invalid config term is provided for legacy events
1025          * (for example, instructions/badterm/...), which is confusing.
1026          */
1027         if (!config_term_avail(term->type_term, err))
1028                 return -EINVAL;
1029         return 0;
1030 #undef CHECK_TYPE_VAL
1031 }
1032
1033 static int config_term_pmu(struct perf_event_attr *attr,
1034                            struct parse_events_term *term,
1035                            struct parse_events_error *err)
1036 {
1037         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
1038                 /*
1039                  * Always succeed for sysfs terms, as we dont know
1040                  * at this point what type they need to have.
1041                  */
1042                 return 0;
1043         else
1044                 return config_term_common(attr, term, err);
1045 }
1046
1047 static int config_term_tracepoint(struct perf_event_attr *attr,
1048                                   struct parse_events_term *term,
1049                                   struct parse_events_error *err)
1050 {
1051         switch (term->type_term) {
1052         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1053         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1054         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1055         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1056         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1057         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1058         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1059                 return config_term_common(attr, term, err);
1060         default:
1061                 if (err) {
1062                         err->idx = term->err_term;
1063                         err->str = strdup("unknown term");
1064                         err->help = strdup("valid terms: call-graph,stack-size\n");
1065                 }
1066                 return -EINVAL;
1067         }
1068
1069         return 0;
1070 }
1071
1072 static int config_attr(struct perf_event_attr *attr,
1073                        struct list_head *head,
1074                        struct parse_events_error *err,
1075                        config_term_func_t config_term)
1076 {
1077         struct parse_events_term *term;
1078
1079         list_for_each_entry(term, head, list)
1080                 if (config_term(attr, term, err))
1081                         return -EINVAL;
1082
1083         return 0;
1084 }
1085
1086 static int get_config_terms(struct list_head *head_config,
1087                             struct list_head *head_terms __maybe_unused)
1088 {
1089 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1090 do {                                                            \
1091         struct perf_evsel_config_term *__t;                     \
1092                                                                 \
1093         __t = zalloc(sizeof(*__t));                             \
1094         if (!__t)                                               \
1095                 return -ENOMEM;                                 \
1096                                                                 \
1097         INIT_LIST_HEAD(&__t->list);                             \
1098         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1099         __t->val.__name = __val;                                \
1100         list_add_tail(&__t->list, head_terms);                  \
1101 } while (0)
1102
1103         struct parse_events_term *term;
1104
1105         list_for_each_entry(term, head_config, list) {
1106                 switch (term->type_term) {
1107                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1108                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1109                         break;
1110                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1111                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1112                         break;
1113                 case PARSE_EVENTS__TERM_TYPE_TIME:
1114                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1115                         break;
1116                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1117                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1118                         break;
1119                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1120                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1121                         break;
1122                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1123                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1124                         break;
1125                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1126                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1127                         break;
1128                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1129                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1130                         break;
1131                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1132                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1133                         break;
1134                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1135                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1136                         break;
1137                 default:
1138                         break;
1139                 }
1140         }
1141 #undef ADD_EVSEL_CONFIG
1142         return 0;
1143 }
1144
1145 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1146                                 const char *sys, const char *event,
1147                                 struct parse_events_error *err,
1148                                 struct list_head *head_config)
1149 {
1150         if (head_config) {
1151                 struct perf_event_attr attr;
1152
1153                 if (config_attr(&attr, head_config, err,
1154                                 config_term_tracepoint))
1155                         return -EINVAL;
1156         }
1157
1158         if (strpbrk(sys, "*?"))
1159                 return add_tracepoint_multi_sys(list, idx, sys, event,
1160                                                 err, head_config);
1161         else
1162                 return add_tracepoint_event(list, idx, sys, event,
1163                                             err, head_config);
1164 }
1165
1166 int parse_events_add_numeric(struct parse_events_evlist *data,
1167                              struct list_head *list,
1168                              u32 type, u64 config,
1169                              struct list_head *head_config)
1170 {
1171         struct perf_event_attr attr;
1172         LIST_HEAD(config_terms);
1173
1174         memset(&attr, 0, sizeof(attr));
1175         attr.type = type;
1176         attr.config = config;
1177
1178         if (head_config) {
1179                 if (config_attr(&attr, head_config, data->error,
1180                                 config_term_common))
1181                         return -EINVAL;
1182
1183                 if (get_config_terms(head_config, &config_terms))
1184                         return -ENOMEM;
1185         }
1186
1187         return add_event(list, &data->idx, &attr,
1188                          get_config_name(head_config), &config_terms);
1189 }
1190
1191 int parse_events_add_pmu(struct parse_events_evlist *data,
1192                          struct list_head *list, char *name,
1193                          struct list_head *head_config)
1194 {
1195         struct perf_event_attr attr;
1196         struct perf_pmu_info info;
1197         struct perf_pmu *pmu;
1198         struct perf_evsel *evsel;
1199         LIST_HEAD(config_terms);
1200
1201         pmu = perf_pmu__find(name);
1202         if (!pmu)
1203                 return -EINVAL;
1204
1205         if (pmu->default_config) {
1206                 memcpy(&attr, pmu->default_config,
1207                        sizeof(struct perf_event_attr));
1208         } else {
1209                 memset(&attr, 0, sizeof(attr));
1210         }
1211
1212         if (!head_config) {
1213                 attr.type = pmu->type;
1214                 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1215                 return evsel ? 0 : -ENOMEM;
1216         }
1217
1218         if (perf_pmu__check_alias(pmu, head_config, &info))
1219                 return -EINVAL;
1220
1221         /*
1222          * Configure hardcoded terms first, no need to check
1223          * return value when called with fail == 0 ;)
1224          */
1225         if (config_attr(&attr, head_config, data->error, config_term_pmu))
1226                 return -EINVAL;
1227
1228         if (get_config_terms(head_config, &config_terms))
1229                 return -ENOMEM;
1230
1231         if (perf_pmu__config(pmu, &attr, head_config, data->error))
1232                 return -EINVAL;
1233
1234         evsel = __add_event(list, &data->idx, &attr,
1235                             get_config_name(head_config), pmu->cpus,
1236                             &config_terms);
1237         if (evsel) {
1238                 evsel->unit = info.unit;
1239                 evsel->scale = info.scale;
1240                 evsel->per_pkg = info.per_pkg;
1241                 evsel->snapshot = info.snapshot;
1242         }
1243
1244         return evsel ? 0 : -ENOMEM;
1245 }
1246
1247 int parse_events__modifier_group(struct list_head *list,
1248                                  char *event_mod)
1249 {
1250         return parse_events__modifier_event(list, event_mod, true);
1251 }
1252
1253 void parse_events__set_leader(char *name, struct list_head *list)
1254 {
1255         struct perf_evsel *leader;
1256
1257         if (list_empty(list)) {
1258                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1259                 return;
1260         }
1261
1262         __perf_evlist__set_leader(list);
1263         leader = list_entry(list->next, struct perf_evsel, node);
1264         leader->group_name = name ? strdup(name) : NULL;
1265 }
1266
1267 /* list_event is assumed to point to malloc'ed memory */
1268 void parse_events_update_lists(struct list_head *list_event,
1269                                struct list_head *list_all)
1270 {
1271         /*
1272          * Called for single event definition. Update the
1273          * 'all event' list, and reinit the 'single event'
1274          * list, for next event definition.
1275          */
1276         list_splice_tail(list_event, list_all);
1277         free(list_event);
1278 }
1279
1280 struct event_modifier {
1281         int eu;
1282         int ek;
1283         int eh;
1284         int eH;
1285         int eG;
1286         int eI;
1287         int precise;
1288         int precise_max;
1289         int exclude_GH;
1290         int sample_read;
1291         int pinned;
1292 };
1293
1294 static int get_event_modifier(struct event_modifier *mod, char *str,
1295                                struct perf_evsel *evsel)
1296 {
1297         int eu = evsel ? evsel->attr.exclude_user : 0;
1298         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1299         int eh = evsel ? evsel->attr.exclude_hv : 0;
1300         int eH = evsel ? evsel->attr.exclude_host : 0;
1301         int eG = evsel ? evsel->attr.exclude_guest : 0;
1302         int eI = evsel ? evsel->attr.exclude_idle : 0;
1303         int precise = evsel ? evsel->attr.precise_ip : 0;
1304         int precise_max = 0;
1305         int sample_read = 0;
1306         int pinned = evsel ? evsel->attr.pinned : 0;
1307
1308         int exclude = eu | ek | eh;
1309         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1310
1311         memset(mod, 0, sizeof(*mod));
1312
1313         while (*str) {
1314                 if (*str == 'u') {
1315                         if (!exclude)
1316                                 exclude = eu = ek = eh = 1;
1317                         eu = 0;
1318                 } else if (*str == 'k') {
1319                         if (!exclude)
1320                                 exclude = eu = ek = eh = 1;
1321                         ek = 0;
1322                 } else if (*str == 'h') {
1323                         if (!exclude)
1324                                 exclude = eu = ek = eh = 1;
1325                         eh = 0;
1326                 } else if (*str == 'G') {
1327                         if (!exclude_GH)
1328                                 exclude_GH = eG = eH = 1;
1329                         eG = 0;
1330                 } else if (*str == 'H') {
1331                         if (!exclude_GH)
1332                                 exclude_GH = eG = eH = 1;
1333                         eH = 0;
1334                 } else if (*str == 'I') {
1335                         eI = 1;
1336                 } else if (*str == 'p') {
1337                         precise++;
1338                         /* use of precise requires exclude_guest */
1339                         if (!exclude_GH)
1340                                 eG = 1;
1341                 } else if (*str == 'P') {
1342                         precise_max = 1;
1343                 } else if (*str == 'S') {
1344                         sample_read = 1;
1345                 } else if (*str == 'D') {
1346                         pinned = 1;
1347                 } else
1348                         break;
1349
1350                 ++str;
1351         }
1352
1353         /*
1354          * precise ip:
1355          *
1356          *  0 - SAMPLE_IP can have arbitrary skid
1357          *  1 - SAMPLE_IP must have constant skid
1358          *  2 - SAMPLE_IP requested to have 0 skid
1359          *  3 - SAMPLE_IP must have 0 skid
1360          *
1361          *  See also PERF_RECORD_MISC_EXACT_IP
1362          */
1363         if (precise > 3)
1364                 return -EINVAL;
1365
1366         mod->eu = eu;
1367         mod->ek = ek;
1368         mod->eh = eh;
1369         mod->eH = eH;
1370         mod->eG = eG;
1371         mod->eI = eI;
1372         mod->precise = precise;
1373         mod->precise_max = precise_max;
1374         mod->exclude_GH = exclude_GH;
1375         mod->sample_read = sample_read;
1376         mod->pinned = pinned;
1377
1378         return 0;
1379 }
1380
1381 /*
1382  * Basic modifier sanity check to validate it contains only one
1383  * instance of any modifier (apart from 'p') present.
1384  */
1385 static int check_modifier(char *str)
1386 {
1387         char *p = str;
1388
1389         /* The sizeof includes 0 byte as well. */
1390         if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1391                 return -1;
1392
1393         while (*p) {
1394                 if (*p != 'p' && strchr(p + 1, *p))
1395                         return -1;
1396                 p++;
1397         }
1398
1399         return 0;
1400 }
1401
1402 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1403 {
1404         struct perf_evsel *evsel;
1405         struct event_modifier mod;
1406
1407         if (str == NULL)
1408                 return 0;
1409
1410         if (check_modifier(str))
1411                 return -EINVAL;
1412
1413         if (!add && get_event_modifier(&mod, str, NULL))
1414                 return -EINVAL;
1415
1416         __evlist__for_each_entry(list, evsel) {
1417                 if (add && get_event_modifier(&mod, str, evsel))
1418                         return -EINVAL;
1419
1420                 evsel->attr.exclude_user   = mod.eu;
1421                 evsel->attr.exclude_kernel = mod.ek;
1422                 evsel->attr.exclude_hv     = mod.eh;
1423                 evsel->attr.precise_ip     = mod.precise;
1424                 evsel->attr.exclude_host   = mod.eH;
1425                 evsel->attr.exclude_guest  = mod.eG;
1426                 evsel->attr.exclude_idle   = mod.eI;
1427                 evsel->exclude_GH          = mod.exclude_GH;
1428                 evsel->sample_read         = mod.sample_read;
1429                 evsel->precise_max         = mod.precise_max;
1430
1431                 if (perf_evsel__is_group_leader(evsel))
1432                         evsel->attr.pinned = mod.pinned;
1433         }
1434
1435         return 0;
1436 }
1437
1438 int parse_events_name(struct list_head *list, char *name)
1439 {
1440         struct perf_evsel *evsel;
1441
1442         __evlist__for_each_entry(list, evsel) {
1443                 if (!evsel->name)
1444                         evsel->name = strdup(name);
1445         }
1446
1447         return 0;
1448 }
1449
1450 static int
1451 comp_pmu(const void *p1, const void *p2)
1452 {
1453         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1454         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1455
1456         return strcmp(pmu1->symbol, pmu2->symbol);
1457 }
1458
1459 static void perf_pmu__parse_cleanup(void)
1460 {
1461         if (perf_pmu_events_list_num > 0) {
1462                 struct perf_pmu_event_symbol *p;
1463                 int i;
1464
1465                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1466                         p = perf_pmu_events_list + i;
1467                         free(p->symbol);
1468                 }
1469                 free(perf_pmu_events_list);
1470                 perf_pmu_events_list = NULL;
1471                 perf_pmu_events_list_num = 0;
1472         }
1473 }
1474
1475 #define SET_SYMBOL(str, stype)          \
1476 do {                                    \
1477         p->symbol = str;                \
1478         if (!p->symbol)                 \
1479                 goto err;               \
1480         p->type = stype;                \
1481 } while (0)
1482
1483 /*
1484  * Read the pmu events list from sysfs
1485  * Save it into perf_pmu_events_list
1486  */
1487 static void perf_pmu__parse_init(void)
1488 {
1489
1490         struct perf_pmu *pmu = NULL;
1491         struct perf_pmu_alias *alias;
1492         int len = 0;
1493
1494         pmu = perf_pmu__find("cpu");
1495         if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1496                 perf_pmu_events_list_num = -1;
1497                 return;
1498         }
1499         list_for_each_entry(alias, &pmu->aliases, list) {
1500                 if (strchr(alias->name, '-'))
1501                         len++;
1502                 len++;
1503         }
1504         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1505         if (!perf_pmu_events_list)
1506                 return;
1507         perf_pmu_events_list_num = len;
1508
1509         len = 0;
1510         list_for_each_entry(alias, &pmu->aliases, list) {
1511                 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1512                 char *tmp = strchr(alias->name, '-');
1513
1514                 if (tmp != NULL) {
1515                         SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1516                                         PMU_EVENT_SYMBOL_PREFIX);
1517                         p++;
1518                         SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1519                         len += 2;
1520                 } else {
1521                         SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1522                         len++;
1523                 }
1524         }
1525         qsort(perf_pmu_events_list, len,
1526                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1527
1528         return;
1529 err:
1530         perf_pmu__parse_cleanup();
1531 }
1532
1533 enum perf_pmu_event_symbol_type
1534 perf_pmu__parse_check(const char *name)
1535 {
1536         struct perf_pmu_event_symbol p, *r;
1537
1538         /* scan kernel pmu events from sysfs if needed */
1539         if (perf_pmu_events_list_num == 0)
1540                 perf_pmu__parse_init();
1541         /*
1542          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1543          * cpu-cycles has been handled by hardcode.
1544          * So it must be cpu// events, not kernel pmu event.
1545          */
1546         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1547                 return PMU_EVENT_SYMBOL_ERR;
1548
1549         p.symbol = strdup(name);
1550         r = bsearch(&p, perf_pmu_events_list,
1551                         (size_t) perf_pmu_events_list_num,
1552                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1553         free(p.symbol);
1554         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1555 }
1556
1557 static int parse_events__scanner(const char *str, void *data, int start_token)
1558 {
1559         YY_BUFFER_STATE buffer;
1560         void *scanner;
1561         int ret;
1562
1563         ret = parse_events_lex_init_extra(start_token, &scanner);
1564         if (ret)
1565                 return ret;
1566
1567         buffer = parse_events__scan_string(str, scanner);
1568
1569 #ifdef PARSER_DEBUG
1570         parse_events_debug = 1;
1571 #endif
1572         ret = parse_events_parse(data, scanner);
1573
1574         parse_events__flush_buffer(buffer, scanner);
1575         parse_events__delete_buffer(buffer, scanner);
1576         parse_events_lex_destroy(scanner);
1577         return ret;
1578 }
1579
1580 /*
1581  * parse event config string, return a list of event terms.
1582  */
1583 int parse_events_terms(struct list_head *terms, const char *str)
1584 {
1585         struct parse_events_terms data = {
1586                 .terms = NULL,
1587         };
1588         int ret;
1589
1590         ret = parse_events__scanner(str, &data, PE_START_TERMS);
1591         if (!ret) {
1592                 list_splice(data.terms, terms);
1593                 zfree(&data.terms);
1594                 return 0;
1595         }
1596
1597         parse_events_terms__delete(data.terms);
1598         return ret;
1599 }
1600
1601 int parse_events(struct perf_evlist *evlist, const char *str,
1602                  struct parse_events_error *err)
1603 {
1604         struct parse_events_evlist data = {
1605                 .list   = LIST_HEAD_INIT(data.list),
1606                 .idx    = evlist->nr_entries,
1607                 .error  = err,
1608                 .evlist = evlist,
1609         };
1610         int ret;
1611
1612         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1613         perf_pmu__parse_cleanup();
1614         if (!ret) {
1615                 struct perf_evsel *last;
1616
1617                 if (list_empty(&data.list)) {
1618                         WARN_ONCE(true, "WARNING: event parser found nothing");
1619                         return -1;
1620                 }
1621
1622                 perf_evlist__splice_list_tail(evlist, &data.list);
1623                 evlist->nr_groups += data.nr_groups;
1624                 last = perf_evlist__last(evlist);
1625                 last->cmdline_group_boundary = true;
1626
1627                 return 0;
1628         }
1629
1630         /*
1631          * There are 2 users - builtin-record and builtin-test objects.
1632          * Both call perf_evlist__delete in case of error, so we dont
1633          * need to bother.
1634          */
1635         return ret;
1636 }
1637
1638 #define MAX_WIDTH 1000
1639 static int get_term_width(void)
1640 {
1641         struct winsize ws;
1642
1643         get_term_dimensions(&ws);
1644         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1645 }
1646
1647 static void parse_events_print_error(struct parse_events_error *err,
1648                                      const char *event)
1649 {
1650         const char *str = "invalid or unsupported event: ";
1651         char _buf[MAX_WIDTH];
1652         char *buf = (char *) event;
1653         int idx = 0;
1654
1655         if (err->str) {
1656                 /* -2 for extra '' in the final fprintf */
1657                 int width       = get_term_width() - 2;
1658                 int len_event   = strlen(event);
1659                 int len_str, max_len, cut = 0;
1660
1661                 /*
1662                  * Maximum error index indent, we will cut
1663                  * the event string if it's bigger.
1664                  */
1665                 int max_err_idx = 13;
1666
1667                 /*
1668                  * Let's be specific with the message when
1669                  * we have the precise error.
1670                  */
1671                 str     = "event syntax error: ";
1672                 len_str = strlen(str);
1673                 max_len = width - len_str;
1674
1675                 buf = _buf;
1676
1677                 /* We're cutting from the beginning. */
1678                 if (err->idx > max_err_idx)
1679                         cut = err->idx - max_err_idx;
1680
1681                 strncpy(buf, event + cut, max_len);
1682
1683                 /* Mark cut parts with '..' on both sides. */
1684                 if (cut)
1685                         buf[0] = buf[1] = '.';
1686
1687                 if ((len_event - cut) > max_len) {
1688                         buf[max_len - 1] = buf[max_len - 2] = '.';
1689                         buf[max_len] = 0;
1690                 }
1691
1692                 idx = len_str + err->idx - cut;
1693         }
1694
1695         fprintf(stderr, "%s'%s'\n", str, buf);
1696         if (idx) {
1697                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1698                 if (err->help)
1699                         fprintf(stderr, "\n%s\n", err->help);
1700                 free(err->str);
1701                 free(err->help);
1702         }
1703
1704         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1705 }
1706
1707 #undef MAX_WIDTH
1708
1709 int parse_events_option(const struct option *opt, const char *str,
1710                         int unset __maybe_unused)
1711 {
1712         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1713         struct parse_events_error err = { .idx = 0, };
1714         int ret = parse_events(evlist, str, &err);
1715
1716         if (ret)
1717                 parse_events_print_error(&err, str);
1718
1719         return ret;
1720 }
1721
1722 static int
1723 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1724                            int (*func)(struct perf_evsel *evsel,
1725                                        const void *arg),
1726                            const void *arg)
1727 {
1728         struct perf_evsel *last = NULL;
1729         int err;
1730
1731         /*
1732          * Don't return when list_empty, give func a chance to report
1733          * error when it found last == NULL.
1734          *
1735          * So no need to WARN here, let *func do this.
1736          */
1737         if (evlist->nr_entries > 0)
1738                 last = perf_evlist__last(evlist);
1739
1740         do {
1741                 err = (*func)(last, arg);
1742                 if (err)
1743                         return -1;
1744                 if (!last)
1745                         return 0;
1746
1747                 if (last->node.prev == &evlist->entries)
1748                         return 0;
1749                 last = list_entry(last->node.prev, struct perf_evsel, node);
1750         } while (!last->cmdline_group_boundary);
1751
1752         return 0;
1753 }
1754
1755 static int set_filter(struct perf_evsel *evsel, const void *arg)
1756 {
1757         const char *str = arg;
1758
1759         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1760                 fprintf(stderr,
1761                         "--filter option should follow a -e tracepoint option\n");
1762                 return -1;
1763         }
1764
1765         if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1766                 fprintf(stderr,
1767                         "not enough memory to hold filter string\n");
1768                 return -1;
1769         }
1770
1771         return 0;
1772 }
1773
1774 int parse_filter(const struct option *opt, const char *str,
1775                  int unset __maybe_unused)
1776 {
1777         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1778
1779         return foreach_evsel_in_last_glob(evlist, set_filter,
1780                                           (const void *)str);
1781 }
1782
1783 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1784                                    const void *arg __maybe_unused)
1785 {
1786         char new_filter[64];
1787
1788         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1789                 fprintf(stderr,
1790                         "--exclude-perf option should follow a -e tracepoint option\n");
1791                 return -1;
1792         }
1793
1794         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1795
1796         if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1797                 fprintf(stderr,
1798                         "not enough memory to hold filter string\n");
1799                 return -1;
1800         }
1801
1802         return 0;
1803 }
1804
1805 int exclude_perf(const struct option *opt,
1806                  const char *arg __maybe_unused,
1807                  int unset __maybe_unused)
1808 {
1809         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1810
1811         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1812                                           NULL);
1813 }
1814
1815 static const char * const event_type_descriptors[] = {
1816         "Hardware event",
1817         "Software event",
1818         "Tracepoint event",
1819         "Hardware cache event",
1820         "Raw hardware event descriptor",
1821         "Hardware breakpoint",
1822 };
1823
1824 static int cmp_string(const void *a, const void *b)
1825 {
1826         const char * const *as = a;
1827         const char * const *bs = b;
1828
1829         return strcmp(*as, *bs);
1830 }
1831
1832 /*
1833  * Print the events from <debugfs_mount_point>/tracing/events
1834  */
1835
1836 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1837                              bool name_only)
1838 {
1839         DIR *sys_dir, *evt_dir;
1840         struct dirent *sys_dirent, *evt_dirent;
1841         char evt_path[MAXPATHLEN];
1842         char dir_path[MAXPATHLEN];
1843         char **evt_list = NULL;
1844         unsigned int evt_i = 0, evt_num = 0;
1845         bool evt_num_known = false;
1846
1847 restart:
1848         sys_dir = opendir(tracing_events_path);
1849         if (!sys_dir)
1850                 return;
1851
1852         if (evt_num_known) {
1853                 evt_list = zalloc(sizeof(char *) * evt_num);
1854                 if (!evt_list)
1855                         goto out_close_sys_dir;
1856         }
1857
1858         for_each_subsystem(sys_dir, sys_dirent) {
1859                 if (subsys_glob != NULL &&
1860                     !strglobmatch(sys_dirent->d_name, subsys_glob))
1861                         continue;
1862
1863                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1864                          sys_dirent->d_name);
1865                 evt_dir = opendir(dir_path);
1866                 if (!evt_dir)
1867                         continue;
1868
1869                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1870                         if (event_glob != NULL &&
1871                             !strglobmatch(evt_dirent->d_name, event_glob))
1872                                 continue;
1873
1874                         if (!evt_num_known) {
1875                                 evt_num++;
1876                                 continue;
1877                         }
1878
1879                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1880                                  sys_dirent->d_name, evt_dirent->d_name);
1881
1882                         evt_list[evt_i] = strdup(evt_path);
1883                         if (evt_list[evt_i] == NULL)
1884                                 goto out_close_evt_dir;
1885                         evt_i++;
1886                 }
1887                 closedir(evt_dir);
1888         }
1889         closedir(sys_dir);
1890
1891         if (!evt_num_known) {
1892                 evt_num_known = true;
1893                 goto restart;
1894         }
1895         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1896         evt_i = 0;
1897         while (evt_i < evt_num) {
1898                 if (name_only) {
1899                         printf("%s ", evt_list[evt_i++]);
1900                         continue;
1901                 }
1902                 printf("  %-50s [%s]\n", evt_list[evt_i++],
1903                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1904         }
1905         if (evt_num && pager_in_use())
1906                 printf("\n");
1907
1908 out_free:
1909         evt_num = evt_i;
1910         for (evt_i = 0; evt_i < evt_num; evt_i++)
1911                 zfree(&evt_list[evt_i]);
1912         zfree(&evt_list);
1913         return;
1914
1915 out_close_evt_dir:
1916         closedir(evt_dir);
1917 out_close_sys_dir:
1918         closedir(sys_dir);
1919
1920         printf("FATAL: not enough memory to print %s\n",
1921                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1922         if (evt_list)
1923                 goto out_free;
1924 }
1925
1926 /*
1927  * Check whether event is in <debugfs_mount_point>/tracing/events
1928  */
1929
1930 int is_valid_tracepoint(const char *event_string)
1931 {
1932         DIR *sys_dir, *evt_dir;
1933         struct dirent *sys_dirent, *evt_dirent;
1934         char evt_path[MAXPATHLEN];
1935         char dir_path[MAXPATHLEN];
1936
1937         sys_dir = opendir(tracing_events_path);
1938         if (!sys_dir)
1939                 return 0;
1940
1941         for_each_subsystem(sys_dir, sys_dirent) {
1942
1943                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1944                          sys_dirent->d_name);
1945                 evt_dir = opendir(dir_path);
1946                 if (!evt_dir)
1947                         continue;
1948
1949                 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1950                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1951                                  sys_dirent->d_name, evt_dirent->d_name);
1952                         if (!strcmp(evt_path, event_string)) {
1953                                 closedir(evt_dir);
1954                                 closedir(sys_dir);
1955                                 return 1;
1956                         }
1957                 }
1958                 closedir(evt_dir);
1959         }
1960         closedir(sys_dir);
1961         return 0;
1962 }
1963
1964 static bool is_event_supported(u8 type, unsigned config)
1965 {
1966         bool ret = true;
1967         int open_return;
1968         struct perf_evsel *evsel;
1969         struct perf_event_attr attr = {
1970                 .type = type,
1971                 .config = config,
1972                 .disabled = 1,
1973         };
1974         struct {
1975                 struct thread_map map;
1976                 int threads[1];
1977         } tmap = {
1978                 .map.nr  = 1,
1979                 .threads = { 0 },
1980         };
1981
1982         evsel = perf_evsel__new(&attr);
1983         if (evsel) {
1984                 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1985                 ret = open_return >= 0;
1986
1987                 if (open_return == -EACCES) {
1988                         /*
1989                          * This happens if the paranoid value
1990                          * /proc/sys/kernel/perf_event_paranoid is set to 2
1991                          * Re-run with exclude_kernel set; we don't do that
1992                          * by default as some ARM machines do not support it.
1993                          *
1994                          */
1995                         evsel->attr.exclude_kernel = 1;
1996                         ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1997                 }
1998                 perf_evsel__delete(evsel);
1999         }
2000
2001         return ret;
2002 }
2003
2004 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2005                       bool name_only)
2006 {
2007         struct probe_cache *pcache;
2008         struct probe_cache_entry *ent;
2009         struct strlist *bidlist, *sdtlist;
2010         struct strlist_config cfg = {.dont_dupstr = true};
2011         struct str_node *nd, *nd2;
2012         char *buf, *path, *ptr = NULL;
2013         bool show_detail = false;
2014         int ret;
2015
2016         sdtlist = strlist__new(NULL, &cfg);
2017         if (!sdtlist) {
2018                 pr_debug("Failed to allocate new strlist for SDT\n");
2019                 return;
2020         }
2021         bidlist = build_id_cache__list_all(true);
2022         if (!bidlist) {
2023                 pr_debug("Failed to get buildids: %d\n", errno);
2024                 return;
2025         }
2026         strlist__for_each_entry(nd, bidlist) {
2027                 pcache = probe_cache__new(nd->s);
2028                 if (!pcache)
2029                         continue;
2030                 list_for_each_entry(ent, &pcache->entries, node) {
2031                         if (!ent->sdt)
2032                                 continue;
2033                         if (subsys_glob &&
2034                             !strglobmatch(ent->pev.group, subsys_glob))
2035                                 continue;
2036                         if (event_glob &&
2037                             !strglobmatch(ent->pev.event, event_glob))
2038                                 continue;
2039                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2040                                         ent->pev.event, nd->s);
2041                         if (ret > 0)
2042                                 strlist__add(sdtlist, buf);
2043                 }
2044                 probe_cache__delete(pcache);
2045         }
2046         strlist__delete(bidlist);
2047
2048         strlist__for_each_entry(nd, sdtlist) {
2049                 buf = strchr(nd->s, '@');
2050                 if (buf)
2051                         *(buf++) = '\0';
2052                 if (name_only) {
2053                         printf("%s ", nd->s);
2054                         continue;
2055                 }
2056                 nd2 = strlist__next(nd);
2057                 if (nd2) {
2058                         ptr = strchr(nd2->s, '@');
2059                         if (ptr)
2060                                 *ptr = '\0';
2061                         if (strcmp(nd->s, nd2->s) == 0)
2062                                 show_detail = true;
2063                 }
2064                 if (show_detail) {
2065                         path = build_id_cache__origname(buf);
2066                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2067                         if (ret > 0) {
2068                                 printf("  %-50s [%s]\n", buf, "SDT event");
2069                                 free(buf);
2070                         }
2071                 } else
2072                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2073                 if (nd2) {
2074                         if (strcmp(nd->s, nd2->s) != 0)
2075                                 show_detail = false;
2076                         if (ptr)
2077                                 *ptr = '@';
2078                 }
2079         }
2080         strlist__delete(sdtlist);
2081 }
2082
2083 int print_hwcache_events(const char *event_glob, bool name_only)
2084 {
2085         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2086         char name[64];
2087         char **evt_list = NULL;
2088         bool evt_num_known = false;
2089
2090 restart:
2091         if (evt_num_known) {
2092                 evt_list = zalloc(sizeof(char *) * evt_num);
2093                 if (!evt_list)
2094                         goto out_enomem;
2095         }
2096
2097         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2098                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2099                         /* skip invalid cache type */
2100                         if (!perf_evsel__is_cache_op_valid(type, op))
2101                                 continue;
2102
2103                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2104                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2105                                                                         name, sizeof(name));
2106                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2107                                         continue;
2108
2109                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2110                                                         type | (op << 8) | (i << 16)))
2111                                         continue;
2112
2113                                 if (!evt_num_known) {
2114                                         evt_num++;
2115                                         continue;
2116                                 }
2117
2118                                 evt_list[evt_i] = strdup(name);
2119                                 if (evt_list[evt_i] == NULL)
2120                                         goto out_enomem;
2121                                 evt_i++;
2122                         }
2123                 }
2124         }
2125
2126         if (!evt_num_known) {
2127                 evt_num_known = true;
2128                 goto restart;
2129         }
2130         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2131         evt_i = 0;
2132         while (evt_i < evt_num) {
2133                 if (name_only) {
2134                         printf("%s ", evt_list[evt_i++]);
2135                         continue;
2136                 }
2137                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2138                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2139         }
2140         if (evt_num && pager_in_use())
2141                 printf("\n");
2142
2143 out_free:
2144         evt_num = evt_i;
2145         for (evt_i = 0; evt_i < evt_num; evt_i++)
2146                 zfree(&evt_list[evt_i]);
2147         zfree(&evt_list);
2148         return evt_num;
2149
2150 out_enomem:
2151         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2152         if (evt_list)
2153                 goto out_free;
2154         return evt_num;
2155 }
2156
2157 void print_symbol_events(const char *event_glob, unsigned type,
2158                                 struct event_symbol *syms, unsigned max,
2159                                 bool name_only)
2160 {
2161         unsigned int i, evt_i = 0, evt_num = 0;
2162         char name[MAX_NAME_LEN];
2163         char **evt_list = NULL;
2164         bool evt_num_known = false;
2165
2166 restart:
2167         if (evt_num_known) {
2168                 evt_list = zalloc(sizeof(char *) * evt_num);
2169                 if (!evt_list)
2170                         goto out_enomem;
2171                 syms -= max;
2172         }
2173
2174         for (i = 0; i < max; i++, syms++) {
2175
2176                 if (event_glob != NULL && syms->symbol != NULL &&
2177                     !(strglobmatch(syms->symbol, event_glob) ||
2178                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2179                         continue;
2180
2181                 if (!is_event_supported(type, i))
2182                         continue;
2183
2184                 if (!evt_num_known) {
2185                         evt_num++;
2186                         continue;
2187                 }
2188
2189                 if (!name_only && strlen(syms->alias))
2190                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2191                 else
2192                         strncpy(name, syms->symbol, MAX_NAME_LEN);
2193
2194                 evt_list[evt_i] = strdup(name);
2195                 if (evt_list[evt_i] == NULL)
2196                         goto out_enomem;
2197                 evt_i++;
2198         }
2199
2200         if (!evt_num_known) {
2201                 evt_num_known = true;
2202                 goto restart;
2203         }
2204         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2205         evt_i = 0;
2206         while (evt_i < evt_num) {
2207                 if (name_only) {
2208                         printf("%s ", evt_list[evt_i++]);
2209                         continue;
2210                 }
2211                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2212         }
2213         if (evt_num && pager_in_use())
2214                 printf("\n");
2215
2216 out_free:
2217         evt_num = evt_i;
2218         for (evt_i = 0; evt_i < evt_num; evt_i++)
2219                 zfree(&evt_list[evt_i]);
2220         zfree(&evt_list);
2221         return;
2222
2223 out_enomem:
2224         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2225         if (evt_list)
2226                 goto out_free;
2227 }
2228
2229 /*
2230  * Print the help text for the event symbols:
2231  */
2232 void print_events(const char *event_glob, bool name_only)
2233 {
2234         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2235                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2236
2237         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2238                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2239
2240         print_hwcache_events(event_glob, name_only);
2241
2242         print_pmu_events(event_glob, name_only);
2243
2244         if (event_glob != NULL)
2245                 return;
2246
2247         if (!name_only) {
2248                 printf("  %-50s [%s]\n",
2249                        "rNNN",
2250                        event_type_descriptors[PERF_TYPE_RAW]);
2251                 printf("  %-50s [%s]\n",
2252                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2253                        event_type_descriptors[PERF_TYPE_RAW]);
2254                 if (pager_in_use())
2255                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2256
2257                 printf("  %-50s [%s]\n",
2258                        "mem:<addr>[/len][:access]",
2259                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2260                 if (pager_in_use())
2261                         printf("\n");
2262         }
2263
2264         print_tracepoint_events(NULL, NULL, name_only);
2265
2266         print_sdt_events(NULL, NULL, name_only);
2267 }
2268
2269 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2270 {
2271         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2272 }
2273
2274 static int new_term(struct parse_events_term **_term, int type_val,
2275                     int type_term, char *config,
2276                     char *str, u64 num, int err_term, int err_val)
2277 {
2278         struct parse_events_term *term;
2279
2280         term = zalloc(sizeof(*term));
2281         if (!term)
2282                 return -ENOMEM;
2283
2284         INIT_LIST_HEAD(&term->list);
2285         term->type_val  = type_val;
2286         term->type_term = type_term;
2287         term->config = config;
2288         term->err_term = err_term;
2289         term->err_val  = err_val;
2290
2291         switch (type_val) {
2292         case PARSE_EVENTS__TERM_TYPE_NUM:
2293                 term->val.num = num;
2294                 break;
2295         case PARSE_EVENTS__TERM_TYPE_STR:
2296                 term->val.str = str;
2297                 break;
2298         default:
2299                 free(term);
2300                 return -EINVAL;
2301         }
2302
2303         *_term = term;
2304         return 0;
2305 }
2306
2307 int parse_events_term__num(struct parse_events_term **term,
2308                            int type_term, char *config, u64 num,
2309                            void *loc_term_, void *loc_val_)
2310 {
2311         YYLTYPE *loc_term = loc_term_;
2312         YYLTYPE *loc_val = loc_val_;
2313
2314         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2315                         config, NULL, num,
2316                         loc_term ? loc_term->first_column : 0,
2317                         loc_val ? loc_val->first_column : 0);
2318 }
2319
2320 int parse_events_term__str(struct parse_events_term **term,
2321                            int type_term, char *config, char *str,
2322                            void *loc_term_, void *loc_val_)
2323 {
2324         YYLTYPE *loc_term = loc_term_;
2325         YYLTYPE *loc_val = loc_val_;
2326
2327         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2328                         config, str, 0,
2329                         loc_term ? loc_term->first_column : 0,
2330                         loc_val ? loc_val->first_column : 0);
2331 }
2332
2333 int parse_events_term__sym_hw(struct parse_events_term **term,
2334                               char *config, unsigned idx)
2335 {
2336         struct event_symbol *sym;
2337
2338         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2339         sym = &event_symbols_hw[idx];
2340
2341         if (config)
2342                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2343                                 PARSE_EVENTS__TERM_TYPE_USER, config,
2344                                 (char *) sym->symbol, 0, 0, 0);
2345         else
2346                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2347                                 PARSE_EVENTS__TERM_TYPE_USER,
2348                                 (char *) "event", (char *) sym->symbol,
2349                                 0, 0, 0);
2350 }
2351
2352 int parse_events_term__clone(struct parse_events_term **new,
2353                              struct parse_events_term *term)
2354 {
2355         return new_term(new, term->type_val, term->type_term, term->config,
2356                         term->val.str, term->val.num,
2357                         term->err_term, term->err_val);
2358 }
2359
2360 void parse_events_terms__purge(struct list_head *terms)
2361 {
2362         struct parse_events_term *term, *h;
2363
2364         list_for_each_entry_safe(term, h, terms, list) {
2365                 if (term->array.nr_ranges)
2366                         free(term->array.ranges);
2367                 list_del_init(&term->list);
2368                 free(term);
2369         }
2370 }
2371
2372 void parse_events_terms__delete(struct list_head *terms)
2373 {
2374         if (!terms)
2375                 return;
2376         parse_events_terms__purge(terms);
2377         free(terms);
2378 }
2379
2380 void parse_events__clear_array(struct parse_events_array *a)
2381 {
2382         free(a->ranges);
2383 }
2384
2385 void parse_events_evlist_error(struct parse_events_evlist *data,
2386                                int idx, const char *str)
2387 {
2388         struct parse_events_error *err = data->error;
2389
2390         if (!err)
2391                 return;
2392         err->idx = idx;
2393         err->str = strdup(str);
2394         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2395 }
2396
2397 static void config_terms_list(char *buf, size_t buf_sz)
2398 {
2399         int i;
2400         bool first = true;
2401
2402         buf[0] = '\0';
2403         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2404                 const char *name = config_term_names[i];
2405
2406                 if (!config_term_avail(i, NULL))
2407                         continue;
2408                 if (!name)
2409                         continue;
2410                 if (name[0] == '<')
2411                         continue;
2412
2413                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2414                         return;
2415
2416                 if (!first)
2417                         strcat(buf, ",");
2418                 else
2419                         first = false;
2420                 strcat(buf, name);
2421         }
2422 }
2423
2424 /*
2425  * Return string contains valid config terms of an event.
2426  * @additional_terms: For terms such as PMU sysfs terms.
2427  */
2428 char *parse_events_formats_error_string(char *additional_terms)
2429 {
2430         char *str;
2431         /* "no-overwrite" is the longest name */
2432         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2433                           (sizeof("no-overwrite") - 1)];
2434
2435         config_terms_list(static_terms, sizeof(static_terms));
2436         /* valid terms */
2437         if (additional_terms) {
2438                 if (asprintf(&str, "valid terms: %s,%s",
2439                              additional_terms, static_terms) < 0)
2440                         goto fail;
2441         } else {
2442                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2443                         goto fail;
2444         }
2445         return str;
2446
2447 fail:
2448         return NULL;
2449 }