tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE int
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "probe-file.h"
  34 #include "asm/bug.h"
  35 #include "util/parse-branch-options.h"
  36 #include "metricgroup.h"
  37 #include "util/evsel_config.h"
  38 #include "util/event.h"
  39
  40 #define MAX_NAME_LEN 100
  41
  42 #ifdef PARSER_DEBUG
  43 extern int parse_events_debug;
  44 #endif
  45 int parse_events_parse(void *parse_state, void *scanner);
  46 static int get_config_terms(struct list_head *head_config,
  47                             struct list_head *head_terms __maybe_unused);
  48
  49 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  50 /*
  51  * The variable indicates the number of supported pmu event symbols.
  52  * 0 means not initialized and ready to init
  53  * -1 means failed to init, don't try anymore
  54  * >0 is the number of supported pmu event symbols
  55  */
  56 static int perf_pmu_events_list_num;
  57
  58 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  59         [PERF_COUNT_HW_CPU_CYCLES] = {
  60                 .symbol = "cpu-cycles",
  61                 .alias  = "cycles",
  62         },
  63         [PERF_COUNT_HW_INSTRUCTIONS] = {
  64                 .symbol = "instructions",
  65                 .alias  = "",
  66         },
  67         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  68                 .symbol = "cache-references",
  69                 .alias  = "",
  70         },
  71         [PERF_COUNT_HW_CACHE_MISSES] = {
  72                 .symbol = "cache-misses",
  73                 .alias  = "",
  74         },
  75         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  76                 .symbol = "branch-instructions",
  77                 .alias  = "branches",
  78         },
  79         [PERF_COUNT_HW_BRANCH_MISSES] = {
  80                 .symbol = "branch-misses",
  81                 .alias  = "",
  82         },
  83         [PERF_COUNT_HW_BUS_CYCLES] = {
  84                 .symbol = "bus-cycles",
  85                 .alias  = "",
  86         },
  87         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  88                 .symbol = "stalled-cycles-frontend",
  89                 .alias  = "idle-cycles-frontend",
  90         },
  91         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  92                 .symbol = "stalled-cycles-backend",
  93                 .alias  = "idle-cycles-backend",
  94         },
  95         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  96                 .symbol = "ref-cycles",
  97                 .alias  = "",
  98         },
  99 };
 100
 101 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 102         [PERF_COUNT_SW_CPU_CLOCK] = {
 103                 .symbol = "cpu-clock",
 104                 .alias  = "",
 105         },
 106         [PERF_COUNT_SW_TASK_CLOCK] = {
 107                 .symbol = "task-clock",
 108                 .alias  = "",
 109         },
 110         [PERF_COUNT_SW_PAGE_FAULTS] = {
 111                 .symbol = "page-faults",
 112                 .alias  = "faults",
 113         },
 114         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 115                 .symbol = "context-switches",
 116                 .alias  = "cs",
 117         },
 118         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 119                 .symbol = "cpu-migrations",
 120                 .alias  = "migrations",
 121         },
 122         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 123                 .symbol = "minor-faults",
 124                 .alias  = "",
 125         },
 126         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 127                 .symbol = "major-faults",
 128                 .alias  = "",
 129         },
 130         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 131                 .symbol = "alignment-faults",
 132                 .alias  = "",
 133         },
 134         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 135                 .symbol = "emulation-faults",
 136                 .alias  = "",
 137         },
 138         [PERF_COUNT_SW_DUMMY] = {
 139                 .symbol = "dummy",
 140                 .alias  = "",
 141         },
 142         [PERF_COUNT_SW_BPF_OUTPUT] = {
 143                 .symbol = "bpf-output",
 144                 .alias  = "",
 145         },
 146 };
 147
 148 #define __PERF_EVENT_FIELD(config, name) \
 149         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 150
 151 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 152 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 153 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 154 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 155
 156 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 157         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 158                 if (sys_dirent->d_type == DT_DIR &&             \
 159                     (strcmp(sys_dirent->d_name, ".")) &&        \
 160                     (strcmp(sys_dirent->d_name, "..")))
 161
 162 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 163 {
 164         char evt_path[MAXPATHLEN];
 165         int fd;
 166
 167         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 168         fd = open(evt_path, O_RDONLY);
 169         if (fd < 0)
 170                 return -EINVAL;
 171         close(fd);
 172
 173         return 0;
 174 }
 175
 176 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 177         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 178                 if (evt_dirent->d_type == DT_DIR &&             \
 179                     (strcmp(evt_dirent->d_name, ".")) &&        \
 180                     (strcmp(evt_dirent->d_name, "..")) &&       \
 181                     (!tp_event_has_id(dir_path, evt_dirent)))
 182
 183 #define MAX_EVENT_LENGTH 512
 184
 185 void parse_events__handle_error(struct parse_events_error *err, int idx,
 186                                 char *str, char *help)
 187 {
 188         if (WARN(!str, "WARNING: failed to provide error string\n")) {
 189                 free(help);
 190                 return;
 191         }
 192         switch (err->num_errors) {
 193         case 0:
 194                 err->idx = idx;
 195                 err->str = str;
 196                 err->help = help;
 197                 break;
 198         case 1:
 199                 err->first_idx = err->idx;
 200                 err->idx = idx;
 201                 err->first_str = err->str;
 202                 err->str = str;
 203                 err->first_help = err->help;
 204                 err->help = help;
 205                 break;
 206         default:
 207                 WARN_ONCE(1, "WARNING: multiple event parsing errors\n");
 208                 free(err->str);
 209                 err->str = str;
 210                 free(err->help);
 211                 err->help = help;
 212                 break;
 213         }
 214         err->num_errors++;
 215 }
 216
 217 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 218 {
 219         struct tracepoint_path *path = NULL;
 220         DIR *sys_dir, *evt_dir;
 221         struct dirent *sys_dirent, *evt_dirent;
 222         char id_buf[24];
 223         int fd;
 224         u64 id;
 225         char evt_path[MAXPATHLEN];
 226         char *dir_path;
 227
 228         sys_dir = tracing_events__opendir();
 229         if (!sys_dir)
 230                 return NULL;
 231
 232         for_each_subsystem(sys_dir, sys_dirent) {
 233                 dir_path = get_events_file(sys_dirent->d_name);
 234                 if (!dir_path)
 235                         continue;
 236                 evt_dir = opendir(dir_path);
 237                 if (!evt_dir)
 238                         goto next;
 239
 240                 for_each_event(dir_path, evt_dir, evt_dirent) {
 241
 242                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 243                                   evt_dirent->d_name);
 244                         fd = open(evt_path, O_RDONLY);
 245                         if (fd < 0)
 246                                 continue;
 247                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 248                                 close(fd);
 249                                 continue;
 250                         }
 251                         close(fd);
 252                         id = atoll(id_buf);
 253                         if (id == config) {
 254                                 put_events_file(dir_path);
 255                                 closedir(evt_dir);
 256                                 closedir(sys_dir);
 257                                 path = zalloc(sizeof(*path));
 258                                 if (!path)
 259                                         return NULL;
 260                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 261                                         free(path);
 262                                         return NULL;
 263                                 }
 264                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 265                                         zfree(&path->system);
 266                                         free(path);
 267                                         return NULL;
 268                                 }
 269                                 return path;
 270                         }
 271                 }
 272                 closedir(evt_dir);
 273 next:
 274                 put_events_file(dir_path);
 275         }
 276
 277         closedir(sys_dir);
 278         return NULL;
 279 }
 280
 281 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 282 {
 283         struct tracepoint_path *path = zalloc(sizeof(*path));
 284         char *str = strchr(name, ':');
 285
 286         if (path == NULL || str == NULL) {
 287                 free(path);
 288                 return NULL;
 289         }
 290
 291         path->system = strndup(name, str - name);
 292         path->name = strdup(str+1);
 293
 294         if (path->system == NULL || path->name == NULL) {
 295                 zfree(&path->system);
 296                 zfree(&path->name);
 297                 zfree(&path);
 298         }
 299
 300         return path;
 301 }
 302
 303 const char *event_type(int type)
 304 {
 305         switch (type) {
 306         case PERF_TYPE_HARDWARE:
 307                 return "hardware";
 308
 309         case PERF_TYPE_SOFTWARE:
 310                 return "software";
 311
 312         case PERF_TYPE_TRACEPOINT:
 313                 return "tracepoint";
 314
 315         case PERF_TYPE_HW_CACHE:
 316                 return "hardware-cache";
 317
 318         default:
 319                 break;
 320         }
 321
 322         return "unknown";
 323 }
 324
 325 static int parse_events__is_name_term(struct parse_events_term *term)
 326 {
 327         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 328 }
 329
 330 static char *get_config_name(struct list_head *head_terms)
 331 {
 332         struct parse_events_term *term;
 333
 334         if (!head_terms)
 335                 return NULL;
 336
 337         list_for_each_entry(term, head_terms, list)
 338                 if (parse_events__is_name_term(term))
 339                         return term->val.str;
 340
 341         return NULL;
 342 }
 343
 344 static struct evsel *
 345 __add_event(struct list_head *list, int *idx,
 346             struct perf_event_attr *attr,
 347             char *name, struct perf_pmu *pmu,
 348             struct list_head *config_terms, bool auto_merge_stats,
 349             const char *cpu_list)
 350 {
 351         struct evsel *evsel;
 352         struct perf_cpu_map *cpus = pmu ? pmu->cpus :
 353                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 354
 355         event_attr_init(attr);
 356
 357         evsel = perf_evsel__new_idx(attr, *idx);
 358         if (!evsel)
 359                 return NULL;
 360
 361         (*idx)++;
 362         evsel->core.cpus   = perf_cpu_map__get(cpus);
 363         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 364         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 365         evsel->auto_merge_stats = auto_merge_stats;
 366
 367         if (name)
 368                 evsel->name = strdup(name);
 369
 370         if (config_terms)
 371                 list_splice(config_terms, &evsel->config_terms);
 372
 373         list_add_tail(&evsel->core.node, list);
 374         return evsel;
 375 }
 376
 377 static int add_event(struct list_head *list, int *idx,
 378                      struct perf_event_attr *attr, char *name,
 379                      struct list_head *config_terms)
 380 {
 381         return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM;
 382 }
 383
 384 static int add_event_tool(struct list_head *list, int *idx,
 385                           enum perf_tool_event tool_event)
 386 {
 387         struct evsel *evsel;
 388         struct perf_event_attr attr = {
 389                 .type = PERF_TYPE_SOFTWARE,
 390                 .config = PERF_COUNT_SW_DUMMY,
 391         };
 392
 393         evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0");
 394         if (!evsel)
 395                 return -ENOMEM;
 396         evsel->tool_event = tool_event;
 397         if (tool_event == PERF_TOOL_DURATION_TIME)
 398                 evsel->unit = strdup("ns");
 399         return 0;
 400 }
 401
 402 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 403 {
 404         int i, j;
 405         int n, longest = -1;
 406
 407         for (i = 0; i < size; i++) {
 408                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 409                         n = strlen(names[i][j]);
 410                         if (n > longest && !strncasecmp(str, names[i][j], n))
 411                                 longest = n;
 412                 }
 413                 if (longest > 0)
 414                         return i;
 415         }
 416
 417         return -1;
 418 }
 419
 420 typedef int config_term_func_t(struct perf_event_attr *attr,
 421                                struct parse_events_term *term,
 422                                struct parse_events_error *err);
 423 static int config_term_common(struct perf_event_attr *attr,
 424                               struct parse_events_term *term,
 425                               struct parse_events_error *err);
 426 static int config_attr(struct perf_event_attr *attr,
 427                        struct list_head *head,
 428                        struct parse_events_error *err,
 429                        config_term_func_t config_term);
 430
 431 int parse_events_add_cache(struct list_head *list, int *idx,
 432                            char *type, char *op_result1, char *op_result2,
 433                            struct parse_events_error *err,
 434                            struct list_head *head_config)
 435 {
 436         struct perf_event_attr attr;
 437         LIST_HEAD(config_terms);
 438         char name[MAX_NAME_LEN], *config_name;
 439         int cache_type = -1, cache_op = -1, cache_result = -1;
 440         char *op_result[2] = { op_result1, op_result2 };
 441         int i, n;
 442
 443         /*
 444          * No fallback - if we cannot get a clear cache type
 445          * then bail out:
 446          */
 447         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 448                                    PERF_COUNT_HW_CACHE_MAX);
 449         if (cache_type == -1)
 450                 return -EINVAL;
 451
 452         config_name = get_config_name(head_config);
 453         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 454
 455         for (i = 0; (i < 2) && (op_result[i]); i++) {
 456                 char *str = op_result[i];
 457
 458                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 459
 460                 if (cache_op == -1) {
 461                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 462                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 463                         if (cache_op >= 0) {
 464                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 465                                         return -EINVAL;
 466                                 continue;
 467                         }
 468                 }
 469
 470                 if (cache_result == -1) {
 471                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 472                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 473                         if (cache_result >= 0)
 474                                 continue;
 475                 }
 476         }
 477
 478         /*
 479          * Fall back to reads:
 480          */
 481         if (cache_op == -1)
 482                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 483
 484         /*
 485          * Fall back to accesses:
 486          */
 487         if (cache_result == -1)
 488                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 489
 490         memset(&attr, 0, sizeof(attr));
 491         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 492         attr.type = PERF_TYPE_HW_CACHE;
 493
 494         if (head_config) {
 495                 if (config_attr(&attr, head_config, err,
 496                                 config_term_common))
 497                         return -EINVAL;
 498
 499                 if (get_config_terms(head_config, &config_terms))
 500                         return -ENOMEM;
 501         }
 502         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 503 }
 504
 505 static void tracepoint_error(struct parse_events_error *e, int err,
 506                              const char *sys, const char *name)
 507 {
 508         const char *str;
 509         char help[BUFSIZ];
 510
 511         if (!e)
 512                 return;
 513
 514         /*
 515          * We get error directly from syscall errno ( > 0),
 516          * or from encoded pointer's error ( < 0).
 517          */
 518         err = abs(err);
 519
 520         switch (err) {
 521         case EACCES:
 522                 str = "can't access trace events";
 523                 break;
 524         case ENOENT:
 525                 str = "unknown tracepoint";
 526                 break;
 527         default:
 528                 str = "failed to add tracepoint";
 529                 break;
 530         }
 531
 532         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 533         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 534 }
 535
 536 static int add_tracepoint(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         struct evsel *evsel;
 542
 543         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 544         if (IS_ERR(evsel)) {
 545                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 546                 return PTR_ERR(evsel);
 547         }
 548
 549         if (head_config) {
 550                 LIST_HEAD(config_terms);
 551
 552                 if (get_config_terms(head_config, &config_terms))
 553                         return -ENOMEM;
 554                 list_splice(&config_terms, &evsel->config_terms);
 555         }
 556
 557         list_add_tail(&evsel->core.node, list);
 558         return 0;
 559 }
 560
 561 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 562                                       const char *sys_name, const char *evt_name,
 563                                       struct parse_events_error *err,
 564                                       struct list_head *head_config)
 565 {
 566         char *evt_path;
 567         struct dirent *evt_ent;
 568         DIR *evt_dir;
 569         int ret = 0, found = 0;
 570
 571         evt_path = get_events_file(sys_name);
 572         if (!evt_path) {
 573                 tracepoint_error(err, errno, sys_name, evt_name);
 574                 return -1;
 575         }
 576         evt_dir = opendir(evt_path);
 577         if (!evt_dir) {
 578                 put_events_file(evt_path);
 579                 tracepoint_error(err, errno, sys_name, evt_name);
 580                 return -1;
 581         }
 582
 583         while (!ret && (evt_ent = readdir(evt_dir))) {
 584                 if (!strcmp(evt_ent->d_name, ".")
 585                     || !strcmp(evt_ent->d_name, "..")
 586                     || !strcmp(evt_ent->d_name, "enable")
 587                     || !strcmp(evt_ent->d_name, "filter"))
 588                         continue;
 589
 590                 if (!strglobmatch(evt_ent->d_name, evt_name))
 591                         continue;
 592
 593                 found++;
 594
 595                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 596                                      err, head_config);
 597         }
 598
 599         if (!found) {
 600                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 601                 ret = -1;
 602         }
 603
 604         put_events_file(evt_path);
 605         closedir(evt_dir);
 606         return ret;
 607 }
 608
 609 static int add_tracepoint_event(struct list_head *list, int *idx,
 610                                 const char *sys_name, const char *evt_name,
 611                                 struct parse_events_error *err,
 612                                 struct list_head *head_config)
 613 {
 614         return strpbrk(evt_name, "*?") ?
 615                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 616                                           err, head_config) :
 617                add_tracepoint(list, idx, sys_name, evt_name,
 618                               err, head_config);
 619 }
 620
 621 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 622                                     const char *sys_name, const char *evt_name,
 623                                     struct parse_events_error *err,
 624                                     struct list_head *head_config)
 625 {
 626         struct dirent *events_ent;
 627         DIR *events_dir;
 628         int ret = 0;
 629
 630         events_dir = tracing_events__opendir();
 631         if (!events_dir) {
 632                 tracepoint_error(err, errno, sys_name, evt_name);
 633                 return -1;
 634         }
 635
 636         while (!ret && (events_ent = readdir(events_dir))) {
 637                 if (!strcmp(events_ent->d_name, ".")
 638                     || !strcmp(events_ent->d_name, "..")
 639                     || !strcmp(events_ent->d_name, "enable")
 640                     || !strcmp(events_ent->d_name, "header_event")
 641                     || !strcmp(events_ent->d_name, "header_page"))
 642                         continue;
 643
 644                 if (!strglobmatch(events_ent->d_name, sys_name))
 645                         continue;
 646
 647                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 648                                            evt_name, err, head_config);
 649         }
 650
 651         closedir(events_dir);
 652         return ret;
 653 }
 654
 655 struct __add_bpf_event_param {
 656         struct parse_events_state *parse_state;
 657         struct list_head *list;
 658         struct list_head *head_config;
 659 };
 660
 661 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 662                          void *_param)
 663 {
 664         LIST_HEAD(new_evsels);
 665         struct __add_bpf_event_param *param = _param;
 666         struct parse_events_state *parse_state = param->parse_state;
 667         struct list_head *list = param->list;
 668         struct evsel *pos;
 669         int err;
 670         /*
 671          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 672          * then don't add the tracepoint, this will be used for something else, like
 673          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 674          *
 675          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 676          */
 677         if (group[0] == '!')
 678                 return 0;
 679
 680         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 681                  group, event, fd);
 682
 683         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 684                                           event, parse_state->error,
 685                                           param->head_config);
 686         if (err) {
 687                 struct evsel *evsel, *tmp;
 688
 689                 pr_debug("Failed to add BPF event %s:%s\n",
 690                          group, event);
 691                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 692                         list_del_init(&evsel->core.node);
 693                         evsel__delete(evsel);
 694                 }
 695                 return err;
 696         }
 697         pr_debug("adding %s:%s\n", group, event);
 698
 699         list_for_each_entry(pos, &new_evsels, core.node) {
 700                 pr_debug("adding %s:%s to %p\n",
 701                          group, event, pos);
 702                 pos->bpf_fd = fd;
 703                 pos->bpf_obj = obj;
 704         }
 705         list_splice(&new_evsels, list);
 706         return 0;
 707 }
 708
 709 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 710                               struct list_head *list,
 711                               struct bpf_object *obj,
 712                               struct list_head *head_config)
 713 {
 714         int err;
 715         char errbuf[BUFSIZ];
 716         struct __add_bpf_event_param param = {parse_state, list, head_config};
 717         static bool registered_unprobe_atexit = false;
 718
 719         if (IS_ERR(obj) || !obj) {
 720                 snprintf(errbuf, sizeof(errbuf),
 721                          "Internal error: load bpf obj with NULL");
 722                 err = -EINVAL;
 723                 goto errout;
 724         }
 725
 726         /*
 727          * Register atexit handler before calling bpf__probe() so
 728          * bpf__probe() don't need to unprobe probe points its already
 729          * created when failure.
 730          */
 731         if (!registered_unprobe_atexit) {
 732                 atexit(bpf__clear);
 733                 registered_unprobe_atexit = true;
 734         }
 735
 736         err = bpf__probe(obj);
 737         if (err) {
 738                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 739                 goto errout;
 740         }
 741
 742         err = bpf__load(obj);
 743         if (err) {
 744                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 745                 goto errout;
 746         }
 747
 748         err = bpf__foreach_event(obj, add_bpf_event, &param);
 749         if (err) {
 750                 snprintf(errbuf, sizeof(errbuf),
 751                          "Attach events in BPF object failed");
 752                 goto errout;
 753         }
 754
 755         return 0;
 756 errout:
 757         parse_state->error->help = strdup("(add -v to see detail)");
 758         parse_state->error->str = strdup(errbuf);
 759         return err;
 760 }
 761
 762 static int
 763 parse_events_config_bpf(struct parse_events_state *parse_state,
 764                         struct bpf_object *obj,
 765                         struct list_head *head_config)
 766 {
 767         struct parse_events_term *term;
 768         int error_pos;
 769
 770         if (!head_config || list_empty(head_config))
 771                 return 0;
 772
 773         list_for_each_entry(term, head_config, list) {
 774                 char errbuf[BUFSIZ];
 775                 int err;
 776
 777                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 778                         snprintf(errbuf, sizeof(errbuf),
 779                                  "Invalid config term for BPF object");
 780                         errbuf[BUFSIZ - 1] = '\0';
 781
 782                         parse_state->error->idx = term->err_term;
 783                         parse_state->error->str = strdup(errbuf);
 784                         return -EINVAL;
 785                 }
 786
 787                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 788                 if (err) {
 789                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 790                                                  &error_pos, err, errbuf,
 791                                                  sizeof(errbuf));
 792                         parse_state->error->help = strdup(
 793 "Hint:\tValid config terms:\n"
 794 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 795 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 796 "\n"
 797 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 798 "     \t(add -v to see detail)");
 799                         parse_state->error->str = strdup(errbuf);
 800                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 801                                 parse_state->error->idx = term->err_val;
 802                         else
 803                                 parse_state->error->idx = term->err_term + error_pos;
 804                         return err;
 805                 }
 806         }
 807         return 0;
 808 }
 809
 810 /*
 811  * Split config terms:
 812  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 813  *  'call-graph=fp' is 'evt config', should be applied to each
 814  *  events in bpf.c.
 815  * 'map:array.value[0]=1' is 'obj config', should be processed
 816  * with parse_events_config_bpf.
 817  *
 818  * Move object config terms from the first list to obj_head_config.
 819  */
 820 static void
 821 split_bpf_config_terms(struct list_head *evt_head_config,
 822                        struct list_head *obj_head_config)
 823 {
 824         struct parse_events_term *term, *temp;
 825
 826         /*
 827          * Currectly, all possible user config term
 828          * belong to bpf object. parse_events__is_hardcoded_term()
 829          * happends to be a good flag.
 830          *
 831          * See parse_events_config_bpf() and
 832          * config_term_tracepoint().
 833          */
 834         list_for_each_entry_safe(term, temp, evt_head_config, list)
 835                 if (!parse_events__is_hardcoded_term(term))
 836                         list_move_tail(&term->list, obj_head_config);
 837 }
 838
 839 int parse_events_load_bpf(struct parse_events_state *parse_state,
 840                           struct list_head *list,
 841                           char *bpf_file_name,
 842                           bool source,
 843                           struct list_head *head_config)
 844 {
 845         int err;
 846         struct bpf_object *obj;
 847         LIST_HEAD(obj_head_config);
 848
 849         if (head_config)
 850                 split_bpf_config_terms(head_config, &obj_head_config);
 851
 852         obj = bpf__prepare_load(bpf_file_name, source);
 853         if (IS_ERR(obj)) {
 854                 char errbuf[BUFSIZ];
 855
 856                 err = PTR_ERR(obj);
 857
 858                 if (err == -ENOTSUP)
 859                         snprintf(errbuf, sizeof(errbuf),
 860                                  "BPF support is not compiled");
 861                 else
 862                         bpf__strerror_prepare_load(bpf_file_name,
 863                                                    source,
 864                                                    -err, errbuf,
 865                                                    sizeof(errbuf));
 866
 867                 parse_state->error->help = strdup("(add -v to see detail)");
 868                 parse_state->error->str = strdup(errbuf);
 869                 return err;
 870         }
 871
 872         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 873         if (err)
 874                 return err;
 875         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 876
 877         /*
 878          * Caller doesn't know anything about obj_head_config,
 879          * so combine them together again before returnning.
 880          */
 881         if (head_config)
 882                 list_splice_tail(&obj_head_config, head_config);
 883         return err;
 884 }
 885
 886 static int
 887 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 888 {
 889         int i;
 890
 891         for (i = 0; i < 3; i++) {
 892                 if (!type || !type[i])
 893                         break;
 894
 895 #define CHECK_SET_TYPE(bit)             \
 896 do {                                    \
 897         if (attr->bp_type & bit)        \
 898                 return -EINVAL;         \
 899         else                            \
 900                 attr->bp_type |= bit;   \
 901 } while (0)
 902
 903                 switch (type[i]) {
 904                 case 'r':
 905                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 906                         break;
 907                 case 'w':
 908                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 909                         break;
 910                 case 'x':
 911                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 912                         break;
 913                 default:
 914                         return -EINVAL;
 915                 }
 916         }
 917
 918 #undef CHECK_SET_TYPE
 919
 920         if (!attr->bp_type) /* Default */
 921                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 922
 923         return 0;
 924 }
 925
 926 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 927                                 void *ptr, char *type, u64 len)
 928 {
 929         struct perf_event_attr attr;
 930
 931         memset(&attr, 0, sizeof(attr));
 932         attr.bp_addr = (unsigned long) ptr;
 933
 934         if (parse_breakpoint_type(type, &attr))
 935                 return -EINVAL;
 936
 937         /* Provide some defaults if len is not specified */
 938         if (!len) {
 939                 if (attr.bp_type == HW_BREAKPOINT_X)
 940                         len = sizeof(long);
 941                 else
 942                         len = HW_BREAKPOINT_LEN_4;
 943         }
 944
 945         attr.bp_len = len;
 946
 947         attr.type = PERF_TYPE_BREAKPOINT;
 948         attr.sample_period = 1;
 949
 950         return add_event(list, idx, &attr, NULL, NULL);
 951 }
 952
 953 static int check_type_val(struct parse_events_term *term,
 954                           struct parse_events_error *err,
 955                           int type)
 956 {
 957         if (type == term->type_val)
 958                 return 0;
 959
 960         if (err) {
 961                 parse_events__handle_error(err, term->err_val,
 962                                         type == PARSE_EVENTS__TERM_TYPE_NUM
 963                                         ? strdup("expected numeric value")
 964                                         : strdup("expected string value"),
 965                                         NULL);
 966         }
 967         return -EINVAL;
 968 }
 969
 970 /*
 971  * Update according to parse-events.l
 972  */
 973 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 974         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 975         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 976         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 977         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 978         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 979         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 980         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 981         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 982         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 983         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 984         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 985         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 986         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 987         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 988         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
 989         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 990         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 991         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 992         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
 993         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
 994         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
 995 };
 996
 997 static bool config_term_shrinked;
 998
 999 static bool
1000 config_term_avail(int term_type, struct parse_events_error *err)
1001 {
1002         char *err_str;
1003
1004         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1005                 parse_events__handle_error(err, -1,
1006                                         strdup("Invalid term_type"), NULL);
1007                 return false;
1008         }
1009         if (!config_term_shrinked)
1010                 return true;
1011
1012         switch (term_type) {
1013         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1014         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1015         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1016         case PARSE_EVENTS__TERM_TYPE_NAME:
1017         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1018         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1019                 return true;
1020         default:
1021                 if (!err)
1022                         return false;
1023
1024                 /* term_type is validated so indexing is safe */
1025                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1026                                 config_term_names[term_type]) >= 0)
1027                         parse_events__handle_error(err, -1, err_str, NULL);
1028                 return false;
1029         }
1030 }
1031
1032 void parse_events__shrink_config_terms(void)
1033 {
1034         config_term_shrinked = true;
1035 }
1036
1037 static int config_term_common(struct perf_event_attr *attr,
1038                               struct parse_events_term *term,
1039                               struct parse_events_error *err)
1040 {
1041 #define CHECK_TYPE_VAL(type)                                               \
1042 do {                                                                       \
1043         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1044                 return -EINVAL;                                            \
1045 } while (0)
1046
1047         switch (term->type_term) {
1048         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1049                 CHECK_TYPE_VAL(NUM);
1050                 attr->config = term->val.num;
1051                 break;
1052         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1053                 CHECK_TYPE_VAL(NUM);
1054                 attr->config1 = term->val.num;
1055                 break;
1056         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1057                 CHECK_TYPE_VAL(NUM);
1058                 attr->config2 = term->val.num;
1059                 break;
1060         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1061                 CHECK_TYPE_VAL(NUM);
1062                 break;
1063         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1064                 CHECK_TYPE_VAL(NUM);
1065                 break;
1066         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1067                 CHECK_TYPE_VAL(STR);
1068                 if (strcmp(term->val.str, "no") &&
1069                     parse_branch_str(term->val.str,
1070                                     &attr->branch_sample_type)) {
1071                         parse_events__handle_error(err, term->err_val,
1072                                         strdup("invalid branch sample type"),
1073                                         NULL);
1074                         return -EINVAL;
1075                 }
1076                 break;
1077         case PARSE_EVENTS__TERM_TYPE_TIME:
1078                 CHECK_TYPE_VAL(NUM);
1079                 if (term->val.num > 1) {
1080                         parse_events__handle_error(err, term->err_val,
1081                                                 strdup("expected 0 or 1"),
1082                                                 NULL);
1083                         return -EINVAL;
1084                 }
1085                 break;
1086         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1087                 CHECK_TYPE_VAL(STR);
1088                 break;
1089         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1090                 CHECK_TYPE_VAL(NUM);
1091                 break;
1092         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1093                 CHECK_TYPE_VAL(NUM);
1094                 break;
1095         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1096                 CHECK_TYPE_VAL(NUM);
1097                 break;
1098         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1099                 CHECK_TYPE_VAL(NUM);
1100                 break;
1101         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1102                 CHECK_TYPE_VAL(NUM);
1103                 break;
1104         case PARSE_EVENTS__TERM_TYPE_NAME:
1105                 CHECK_TYPE_VAL(STR);
1106                 break;
1107         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1108                 CHECK_TYPE_VAL(NUM);
1109                 break;
1110         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1111                 CHECK_TYPE_VAL(NUM);
1112                 break;
1113         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1114                 CHECK_TYPE_VAL(NUM);
1115                 if ((unsigned int)term->val.num > 1) {
1116                         parse_events__handle_error(err, term->err_val,
1117                                                 strdup("expected 0 or 1"),
1118                                                 NULL);
1119                         return -EINVAL;
1120                 }
1121                 break;
1122         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1123                 CHECK_TYPE_VAL(NUM);
1124                 break;
1125         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1126                 CHECK_TYPE_VAL(NUM);
1127                 if (term->val.num > UINT_MAX) {
1128                         parse_events__handle_error(err, term->err_val,
1129                                                 strdup("too big"),
1130                                                 NULL);
1131                         return -EINVAL;
1132                 }
1133                 break;
1134         default:
1135                 parse_events__handle_error(err, term->err_term,
1136                                 strdup("unknown term"),
1137                                 parse_events_formats_error_string(NULL));
1138                 return -EINVAL;
1139         }
1140
1141         /*
1142          * Check term availbility after basic checking so
1143          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1144          *
1145          * If check availbility at the entry of this function,
1146          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1147          * if an invalid config term is provided for legacy events
1148          * (for example, instructions/badterm/...), which is confusing.
1149          */
1150         if (!config_term_avail(term->type_term, err))
1151                 return -EINVAL;
1152         return 0;
1153 #undef CHECK_TYPE_VAL
1154 }
1155
1156 static int config_term_pmu(struct perf_event_attr *attr,
1157                            struct parse_events_term *term,
1158                            struct parse_events_error *err)
1159 {
1160         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1161             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1162                 /*
1163                  * Always succeed for sysfs terms, as we dont know
1164                  * at this point what type they need to have.
1165                  */
1166                 return 0;
1167         else
1168                 return config_term_common(attr, term, err);
1169 }
1170
1171 static int config_term_tracepoint(struct perf_event_attr *attr,
1172                                   struct parse_events_term *term,
1173                                   struct parse_events_error *err)
1174 {
1175         switch (term->type_term) {
1176         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1177         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1178         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1179         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1180         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1181         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1182         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1183         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1184         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1185         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1186                 return config_term_common(attr, term, err);
1187         default:
1188                 if (err) {
1189                         parse_events__handle_error(err, term->err_term,
1190                                 strdup("unknown term"),
1191                                 strdup("valid terms: call-graph,stack-size\n"));
1192                 }
1193                 return -EINVAL;
1194         }
1195
1196         return 0;
1197 }
1198
1199 static int config_attr(struct perf_event_attr *attr,
1200                        struct list_head *head,
1201                        struct parse_events_error *err,
1202                        config_term_func_t config_term)
1203 {
1204         struct parse_events_term *term;
1205
1206         list_for_each_entry(term, head, list)
1207                 if (config_term(attr, term, err))
1208                         return -EINVAL;
1209
1210         return 0;
1211 }
1212
1213 static int get_config_terms(struct list_head *head_config,
1214                             struct list_head *head_terms __maybe_unused)
1215 {
1216 #define ADD_CONFIG_TERM(__type, __weak)                         \
1217         struct perf_evsel_config_term *__t;                     \
1218                                                                 \
1219         __t = zalloc(sizeof(*__t));                             \
1220         if (!__t)                                               \
1221                 return -ENOMEM;                                 \
1222                                                                 \
1223         INIT_LIST_HEAD(&__t->list);                             \
1224         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1225         __t->weak       = __weak;                               \
1226         list_add_tail(&__t->list, head_terms)
1227
1228 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1229 do {                                                            \
1230         ADD_CONFIG_TERM(__type, __weak);                        \
1231         __t->val.__name = __val;                                \
1232 } while (0)
1233
1234 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1235 do {                                                            \
1236         ADD_CONFIG_TERM(__type, __weak);                        \
1237         __t->val.str = strdup(__val);                           \
1238         if (!__t->val.str) {                                    \
1239                 zfree(&__t);                                    \
1240                 return -ENOMEM;                                 \
1241         }                                                       \
1242         __t->free_str = true;                                   \
1243 } while (0)
1244
1245         struct parse_events_term *term;
1246
1247         list_for_each_entry(term, head_config, list) {
1248                 switch (term->type_term) {
1249                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1250                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1251                         break;
1252                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1253                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1254                         break;
1255                 case PARSE_EVENTS__TERM_TYPE_TIME:
1256                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1257                         break;
1258                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1259                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1260                         break;
1261                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1262                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1263                         break;
1264                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1265                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1266                                             term->val.num, term->weak);
1267                         break;
1268                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1269                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1270                                             term->val.num ? 1 : 0, term->weak);
1271                         break;
1272                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1273                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1274                                             term->val.num ? 0 : 1, term->weak);
1275                         break;
1276                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1277                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1278                                             term->val.num, term->weak);
1279                         break;
1280                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1281                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1282                                             term->val.num, term->weak);
1283                         break;
1284                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1285                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1286                                             term->val.num ? 1 : 0, term->weak);
1287                         break;
1288                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1289                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1290                                             term->val.num ? 0 : 1, term->weak);
1291                         break;
1292                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1293                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1294                         break;
1295                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1296                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1297                                             term->val.num ? true : false, term->weak);
1298                         break;
1299                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1300                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1301                                             term->val.num ? 1 : 0, term->weak);
1302                         break;
1303                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1304                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1305                                             term->val.num, term->weak);
1306                         break;
1307                 default:
1308                         break;
1309                 }
1310         }
1311         return 0;
1312 }
1313
1314 /*
1315  * Add PERF_EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1316  * each bit of attr->config that the user has changed.
1317  */
1318 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1319                            struct list_head *head_terms)
1320 {
1321         struct parse_events_term *term;
1322         u64 bits = 0;
1323         int type;
1324
1325         list_for_each_entry(term, head_config, list) {
1326                 switch (term->type_term) {
1327                 case PARSE_EVENTS__TERM_TYPE_USER:
1328                         type = perf_pmu__format_type(&pmu->format, term->config);
1329                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1330                                 continue;
1331                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1332                         break;
1333                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1334                         bits = ~(u64)0;
1335                         break;
1336                 default:
1337                         break;
1338                 }
1339         }
1340
1341         if (bits)
1342                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1343
1344 #undef ADD_CONFIG_TERM
1345         return 0;
1346 }
1347
1348 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1349                                 const char *sys, const char *event,
1350                                 struct parse_events_error *err,
1351                                 struct list_head *head_config)
1352 {
1353         if (head_config) {
1354                 struct perf_event_attr attr;
1355
1356                 if (config_attr(&attr, head_config, err,
1357                                 config_term_tracepoint))
1358                         return -EINVAL;
1359         }
1360
1361         if (strpbrk(sys, "*?"))
1362                 return add_tracepoint_multi_sys(list, idx, sys, event,
1363                                                 err, head_config);
1364         else
1365                 return add_tracepoint_event(list, idx, sys, event,
1366                                             err, head_config);
1367 }
1368
1369 int parse_events_add_numeric(struct parse_events_state *parse_state,
1370                              struct list_head *list,
1371                              u32 type, u64 config,
1372                              struct list_head *head_config)
1373 {
1374         struct perf_event_attr attr;
1375         LIST_HEAD(config_terms);
1376
1377         memset(&attr, 0, sizeof(attr));
1378         attr.type = type;
1379         attr.config = config;
1380
1381         if (head_config) {
1382                 if (config_attr(&attr, head_config, parse_state->error,
1383                                 config_term_common))
1384                         return -EINVAL;
1385
1386                 if (get_config_terms(head_config, &config_terms))
1387                         return -ENOMEM;
1388         }
1389
1390         return add_event(list, &parse_state->idx, &attr,
1391                          get_config_name(head_config), &config_terms);
1392 }
1393
1394 int parse_events_add_tool(struct parse_events_state *parse_state,
1395                           struct list_head *list,
1396                           enum perf_tool_event tool_event)
1397 {
1398         return add_event_tool(list, &parse_state->idx, tool_event);
1399 }
1400
1401 static bool config_term_percore(struct list_head *config_terms)
1402 {
1403         struct perf_evsel_config_term *term;
1404
1405         list_for_each_entry(term, config_terms, list) {
1406                 if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
1407                         return term->val.percore;
1408         }
1409
1410         return false;
1411 }
1412
1413 int parse_events_add_pmu(struct parse_events_state *parse_state,
1414                          struct list_head *list, char *name,
1415                          struct list_head *head_config,
1416                          bool auto_merge_stats,
1417                          bool use_alias)
1418 {
1419         struct perf_event_attr attr;
1420         struct perf_pmu_info info;
1421         struct perf_pmu *pmu;
1422         struct evsel *evsel;
1423         struct parse_events_error *err = parse_state->error;
1424         bool use_uncore_alias;
1425         LIST_HEAD(config_terms);
1426
1427         pmu = perf_pmu__find(name);
1428         if (!pmu) {
1429                 char *err_str;
1430
1431                 if (asprintf(&err_str,
1432                                 "Cannot find PMU `%s'. Missing kernel support?",
1433                                 name) >= 0)
1434                         parse_events__handle_error(err, 0, err_str, NULL);
1435                 return -EINVAL;
1436         }
1437
1438         if (pmu->default_config) {
1439                 memcpy(&attr, pmu->default_config,
1440                        sizeof(struct perf_event_attr));
1441         } else {
1442                 memset(&attr, 0, sizeof(attr));
1443         }
1444
1445         use_uncore_alias = (pmu->is_uncore && use_alias);
1446
1447         if (!head_config) {
1448                 attr.type = pmu->type;
1449                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1450                                     auto_merge_stats, NULL);
1451                 if (evsel) {
1452                         evsel->pmu_name = name ? strdup(name) : NULL;
1453                         evsel->use_uncore_alias = use_uncore_alias;
1454                         return 0;
1455                 } else {
1456                         return -ENOMEM;
1457                 }
1458         }
1459
1460         if (perf_pmu__check_alias(pmu, head_config, &info))
1461                 return -EINVAL;
1462
1463         /*
1464          * Configure hardcoded terms first, no need to check
1465          * return value when called with fail == 0 ;)
1466          */
1467         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1468                 return -EINVAL;
1469
1470         if (get_config_terms(head_config, &config_terms))
1471                 return -ENOMEM;
1472
1473         /*
1474          * When using default config, record which bits of attr->config were
1475          * changed by the user.
1476          */
1477         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1478                 return -ENOMEM;
1479
1480         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1481                 struct perf_evsel_config_term *pos, *tmp;
1482
1483                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1484                         list_del_init(&pos->list);
1485                         zfree(&pos->val.str);
1486                         free(pos);
1487                 }
1488                 return -EINVAL;
1489         }
1490
1491         evsel = __add_event(list, &parse_state->idx, &attr,
1492                             get_config_name(head_config), pmu,
1493                             &config_terms, auto_merge_stats, NULL);
1494         if (evsel) {
1495                 evsel->unit = info.unit;
1496                 evsel->scale = info.scale;
1497                 evsel->per_pkg = info.per_pkg;
1498                 evsel->snapshot = info.snapshot;
1499                 evsel->metric_expr = info.metric_expr;
1500                 evsel->metric_name = info.metric_name;
1501                 evsel->pmu_name = name ? strdup(name) : NULL;
1502                 evsel->use_uncore_alias = use_uncore_alias;
1503                 evsel->percore = config_term_percore(&evsel->config_terms);
1504         }
1505
1506         return evsel ? 0 : -ENOMEM;
1507 }
1508
1509 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1510                                char *str, struct list_head **listp)
1511 {
1512         struct parse_events_term *term;
1513         struct list_head *list;
1514         struct perf_pmu *pmu = NULL;
1515         int ok = 0;
1516
1517         *listp = NULL;
1518         /* Add it for all PMUs that support the alias */
1519         list = malloc(sizeof(struct list_head));
1520         if (!list)
1521                 return -1;
1522         INIT_LIST_HEAD(list);
1523         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1524                 struct perf_pmu_alias *alias;
1525
1526                 list_for_each_entry(alias, &pmu->aliases, list) {
1527                         if (!strcasecmp(alias->name, str)) {
1528                                 struct list_head *head;
1529                                 char *config;
1530
1531                                 head = malloc(sizeof(struct list_head));
1532                                 if (!head)
1533                                         return -1;
1534                                 INIT_LIST_HEAD(head);
1535                                 config = strdup(str);
1536                                 if (!config)
1537                                         return -1;
1538                                 if (parse_events_term__num(&term,
1539                                                    PARSE_EVENTS__TERM_TYPE_USER,
1540                                                    config, 1, false, &config,
1541                                                    NULL) < 0) {
1542                                         free(list);
1543                                         free(config);
1544                                         return -1;
1545                                 }
1546                                 list_add_tail(&term->list, head);
1547
1548                                 if (!parse_events_add_pmu(parse_state, list,
1549                                                           pmu->name, head,
1550                                                           true, true)) {
1551                                         pr_debug("%s -> %s/%s/\n", str,
1552                                                  pmu->name, alias->str);
1553                                         ok++;
1554                                 }
1555
1556                                 parse_events_terms__delete(head);
1557                         }
1558                 }
1559         }
1560         if (!ok) {
1561                 free(list);
1562                 return -1;
1563         }
1564         *listp = list;
1565         return 0;
1566 }
1567
1568 int parse_events__modifier_group(struct list_head *list,
1569                                  char *event_mod)
1570 {
1571         return parse_events__modifier_event(list, event_mod, true);
1572 }
1573
1574 /*
1575  * Check if the two uncore PMUs are from the same uncore block
1576  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1577  */
1578 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1579 {
1580         char *end_a, *end_b;
1581
1582         end_a = strrchr(pmu_name_a, '_');
1583         end_b = strrchr(pmu_name_b, '_');
1584
1585         if (!end_a || !end_b)
1586                 return false;
1587
1588         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1589                 return false;
1590
1591         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1592 }
1593
1594 static int
1595 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1596                                            struct parse_events_state *parse_state)
1597 {
1598         struct evsel *evsel, *leader;
1599         uintptr_t *leaders;
1600         bool is_leader = true;
1601         int i, nr_pmu = 0, total_members, ret = 0;
1602
1603         leader = list_first_entry(list, struct evsel, core.node);
1604         evsel = list_last_entry(list, struct evsel, core.node);
1605         total_members = evsel->idx - leader->idx + 1;
1606
1607         leaders = calloc(total_members, sizeof(uintptr_t));
1608         if (WARN_ON(!leaders))
1609                 return 0;
1610
1611         /*
1612          * Going through the whole group and doing sanity check.
1613          * All members must use alias, and be from the same uncore block.
1614          * Also, storing the leader events in an array.
1615          */
1616         __evlist__for_each_entry(list, evsel) {
1617
1618                 /* Only split the uncore group which members use alias */
1619                 if (!evsel->use_uncore_alias)
1620                         goto out;
1621
1622                 /* The events must be from the same uncore block */
1623                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1624                         goto out;
1625
1626                 if (!is_leader)
1627                         continue;
1628                 /*
1629                  * If the event's PMU name starts to repeat, it must be a new
1630                  * event. That can be used to distinguish the leader from
1631                  * other members, even they have the same event name.
1632                  */
1633                 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1634                         is_leader = false;
1635                         continue;
1636                 }
1637                 /* The name is always alias name */
1638                 WARN_ON(strcmp(leader->name, evsel->name));
1639
1640                 /* Store the leader event for each PMU */
1641                 leaders[nr_pmu++] = (uintptr_t) evsel;
1642         }
1643
1644         /* only one event alias */
1645         if (nr_pmu == total_members) {
1646                 parse_state->nr_groups--;
1647                 goto handled;
1648         }
1649
1650         /*
1651          * An uncore event alias is a joint name which means the same event
1652          * runs on all PMUs of a block.
1653          * Perf doesn't support mixed events from different PMUs in the same
1654          * group. The big group has to be split into multiple small groups
1655          * which only include the events from the same PMU.
1656          *
1657          * Here the uncore event aliases must be from the same uncore block.
1658          * The number of PMUs must be same for each alias. The number of new
1659          * small groups equals to the number of PMUs.
1660          * Setting the leader event for corresponding members in each group.
1661          */
1662         i = 0;
1663         __evlist__for_each_entry(list, evsel) {
1664                 if (i >= nr_pmu)
1665                         i = 0;
1666                 evsel->leader = (struct evsel *) leaders[i++];
1667         }
1668
1669         /* The number of members and group name are same for each group */
1670         for (i = 0; i < nr_pmu; i++) {
1671                 evsel = (struct evsel *) leaders[i];
1672                 evsel->core.nr_members = total_members / nr_pmu;
1673                 evsel->group_name = name ? strdup(name) : NULL;
1674         }
1675
1676         /* Take the new small groups into account */
1677         parse_state->nr_groups += nr_pmu - 1;
1678
1679 handled:
1680         ret = 1;
1681 out:
1682         free(leaders);
1683         return ret;
1684 }
1685
1686 void parse_events__set_leader(char *name, struct list_head *list,
1687                               struct parse_events_state *parse_state)
1688 {
1689         struct evsel *leader;
1690
1691         if (list_empty(list)) {
1692                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1693                 return;
1694         }
1695
1696         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1697                 return;
1698
1699         __perf_evlist__set_leader(list);
1700         leader = list_entry(list->next, struct evsel, core.node);
1701         leader->group_name = name ? strdup(name) : NULL;
1702 }
1703
1704 /* list_event is assumed to point to malloc'ed memory */
1705 void parse_events_update_lists(struct list_head *list_event,
1706                                struct list_head *list_all)
1707 {
1708         /*
1709          * Called for single event definition. Update the
1710          * 'all event' list, and reinit the 'single event'
1711          * list, for next event definition.
1712          */
1713         list_splice_tail(list_event, list_all);
1714         free(list_event);
1715 }
1716
1717 struct event_modifier {
1718         int eu;
1719         int ek;
1720         int eh;
1721         int eH;
1722         int eG;
1723         int eI;
1724         int precise;
1725         int precise_max;
1726         int exclude_GH;
1727         int sample_read;
1728         int pinned;
1729         int weak;
1730 };
1731
1732 static int get_event_modifier(struct event_modifier *mod, char *str,
1733                                struct evsel *evsel)
1734 {
1735         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1736         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1737         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1738         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1739         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1740         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1741         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1742         int precise_max = 0;
1743         int sample_read = 0;
1744         int pinned = evsel ? evsel->core.attr.pinned : 0;
1745
1746         int exclude = eu | ek | eh;
1747         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1748         int weak = 0;
1749
1750         memset(mod, 0, sizeof(*mod));
1751
1752         while (*str) {
1753                 if (*str == 'u') {
1754                         if (!exclude)
1755                                 exclude = eu = ek = eh = 1;
1756                         eu = 0;
1757                 } else if (*str == 'k') {
1758                         if (!exclude)
1759                                 exclude = eu = ek = eh = 1;
1760                         ek = 0;
1761                 } else if (*str == 'h') {
1762                         if (!exclude)
1763                                 exclude = eu = ek = eh = 1;
1764                         eh = 0;
1765                 } else if (*str == 'G') {
1766                         if (!exclude_GH)
1767                                 exclude_GH = eG = eH = 1;
1768                         eG = 0;
1769                 } else if (*str == 'H') {
1770                         if (!exclude_GH)
1771                                 exclude_GH = eG = eH = 1;
1772                         eH = 0;
1773                 } else if (*str == 'I') {
1774                         eI = 1;
1775                 } else if (*str == 'p') {
1776                         precise++;
1777                         /* use of precise requires exclude_guest */
1778                         if (!exclude_GH)
1779                                 eG = 1;
1780                 } else if (*str == 'P') {
1781                         precise_max = 1;
1782                 } else if (*str == 'S') {
1783                         sample_read = 1;
1784                 } else if (*str == 'D') {
1785                         pinned = 1;
1786                 } else if (*str == 'W') {
1787                         weak = 1;
1788                 } else
1789                         break;
1790
1791                 ++str;
1792         }
1793
1794         /*
1795          * precise ip:
1796          *
1797          *  0 - SAMPLE_IP can have arbitrary skid
1798          *  1 - SAMPLE_IP must have constant skid
1799          *  2 - SAMPLE_IP requested to have 0 skid
1800          *  3 - SAMPLE_IP must have 0 skid
1801          *
1802          *  See also PERF_RECORD_MISC_EXACT_IP
1803          */
1804         if (precise > 3)
1805                 return -EINVAL;
1806
1807         mod->eu = eu;
1808         mod->ek = ek;
1809         mod->eh = eh;
1810         mod->eH = eH;
1811         mod->eG = eG;
1812         mod->eI = eI;
1813         mod->precise = precise;
1814         mod->precise_max = precise_max;
1815         mod->exclude_GH = exclude_GH;
1816         mod->sample_read = sample_read;
1817         mod->pinned = pinned;
1818         mod->weak = weak;
1819
1820         return 0;
1821 }
1822
1823 /*
1824  * Basic modifier sanity check to validate it contains only one
1825  * instance of any modifier (apart from 'p') present.
1826  */
1827 static int check_modifier(char *str)
1828 {
1829         char *p = str;
1830
1831         /* The sizeof includes 0 byte as well. */
1832         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1833                 return -1;
1834
1835         while (*p) {
1836                 if (*p != 'p' && strchr(p + 1, *p))
1837                         return -1;
1838                 p++;
1839         }
1840
1841         return 0;
1842 }
1843
1844 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1845 {
1846         struct evsel *evsel;
1847         struct event_modifier mod;
1848
1849         if (str == NULL)
1850                 return 0;
1851
1852         if (check_modifier(str))
1853                 return -EINVAL;
1854
1855         if (!add && get_event_modifier(&mod, str, NULL))
1856                 return -EINVAL;
1857
1858         __evlist__for_each_entry(list, evsel) {
1859                 if (add && get_event_modifier(&mod, str, evsel))
1860                         return -EINVAL;
1861
1862                 evsel->core.attr.exclude_user   = mod.eu;
1863                 evsel->core.attr.exclude_kernel = mod.ek;
1864                 evsel->core.attr.exclude_hv     = mod.eh;
1865                 evsel->core.attr.precise_ip     = mod.precise;
1866                 evsel->core.attr.exclude_host   = mod.eH;
1867                 evsel->core.attr.exclude_guest  = mod.eG;
1868                 evsel->core.attr.exclude_idle   = mod.eI;
1869                 evsel->exclude_GH          = mod.exclude_GH;
1870                 evsel->sample_read         = mod.sample_read;
1871                 evsel->precise_max         = mod.precise_max;
1872                 evsel->weak_group          = mod.weak;
1873
1874                 if (perf_evsel__is_group_leader(evsel))
1875                         evsel->core.attr.pinned = mod.pinned;
1876         }
1877
1878         return 0;
1879 }
1880
1881 int parse_events_name(struct list_head *list, char *name)
1882 {
1883         struct evsel *evsel;
1884
1885         __evlist__for_each_entry(list, evsel) {
1886                 if (!evsel->name)
1887                         evsel->name = strdup(name);
1888         }
1889
1890         return 0;
1891 }
1892
1893 static int
1894 comp_pmu(const void *p1, const void *p2)
1895 {
1896         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1897         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1898
1899         return strcasecmp(pmu1->symbol, pmu2->symbol);
1900 }
1901
1902 static void perf_pmu__parse_cleanup(void)
1903 {
1904         if (perf_pmu_events_list_num > 0) {
1905                 struct perf_pmu_event_symbol *p;
1906                 int i;
1907
1908                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1909                         p = perf_pmu_events_list + i;
1910                         zfree(&p->symbol);
1911                 }
1912                 zfree(&perf_pmu_events_list);
1913                 perf_pmu_events_list_num = 0;
1914         }
1915 }
1916
1917 #define SET_SYMBOL(str, stype)          \
1918 do {                                    \
1919         p->symbol = str;                \
1920         if (!p->symbol)                 \
1921                 goto err;               \
1922         p->type = stype;                \
1923 } while (0)
1924
1925 /*
1926  * Read the pmu events list from sysfs
1927  * Save it into perf_pmu_events_list
1928  */
1929 static void perf_pmu__parse_init(void)
1930 {
1931
1932         struct perf_pmu *pmu = NULL;
1933         struct perf_pmu_alias *alias;
1934         int len = 0;
1935
1936         pmu = NULL;
1937         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1938                 list_for_each_entry(alias, &pmu->aliases, list) {
1939                         if (strchr(alias->name, '-'))
1940                                 len++;
1941                         len++;
1942                 }
1943         }
1944
1945         if (len == 0) {
1946                 perf_pmu_events_list_num = -1;
1947                 return;
1948         }
1949         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1950         if (!perf_pmu_events_list)
1951                 return;
1952         perf_pmu_events_list_num = len;
1953
1954         len = 0;
1955         pmu = NULL;
1956         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1957                 list_for_each_entry(alias, &pmu->aliases, list) {
1958                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1959                         char *tmp = strchr(alias->name, '-');
1960
1961                         if (tmp != NULL) {
1962                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1963                                                 PMU_EVENT_SYMBOL_PREFIX);
1964                                 p++;
1965                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1966                                 len += 2;
1967                         } else {
1968                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1969                                 len++;
1970                         }
1971                 }
1972         }
1973         qsort(perf_pmu_events_list, len,
1974                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1975
1976         return;
1977 err:
1978         perf_pmu__parse_cleanup();
1979 }
1980
1981 enum perf_pmu_event_symbol_type
1982 perf_pmu__parse_check(const char *name)
1983 {
1984         struct perf_pmu_event_symbol p, *r;
1985
1986         /* scan kernel pmu events from sysfs if needed */
1987         if (perf_pmu_events_list_num == 0)
1988                 perf_pmu__parse_init();
1989         /*
1990          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1991          * cpu-cycles has been handled by hardcode.
1992          * So it must be cpu// events, not kernel pmu event.
1993          */
1994         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1995                 return PMU_EVENT_SYMBOL_ERR;
1996
1997         p.symbol = strdup(name);
1998         r = bsearch(&p, perf_pmu_events_list,
1999                         (size_t) perf_pmu_events_list_num,
2000                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2001         zfree(&p.symbol);
2002         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2003 }
2004
2005 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
2006 {
2007         YY_BUFFER_STATE buffer;
2008         void *scanner;
2009         int ret;
2010
2011         ret = parse_events_lex_init_extra(start_token, &scanner);
2012         if (ret)
2013                 return ret;
2014
2015         buffer = parse_events__scan_string(str, scanner);
2016
2017 #ifdef PARSER_DEBUG
2018         parse_events_debug = 1;
2019 #endif
2020         ret = parse_events_parse(parse_state, scanner);
2021
2022         parse_events__flush_buffer(buffer, scanner);
2023         parse_events__delete_buffer(buffer, scanner);
2024         parse_events_lex_destroy(scanner);
2025         return ret;
2026 }
2027
2028 /*
2029  * parse event config string, return a list of event terms.
2030  */
2031 int parse_events_terms(struct list_head *terms, const char *str)
2032 {
2033         struct parse_events_state parse_state = {
2034                 .terms = NULL,
2035         };
2036         int ret;
2037
2038         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
2039         if (!ret) {
2040                 list_splice(parse_state.terms, terms);
2041                 zfree(&parse_state.terms);
2042                 return 0;
2043         }
2044
2045         parse_events_terms__delete(parse_state.terms);
2046         return ret;
2047 }
2048
2049 int parse_events(struct evlist *evlist, const char *str,
2050                  struct parse_events_error *err)
2051 {
2052         struct parse_events_state parse_state = {
2053                 .list   = LIST_HEAD_INIT(parse_state.list),
2054                 .idx    = evlist->core.nr_entries,
2055                 .error  = err,
2056                 .evlist = evlist,
2057         };
2058         int ret;
2059
2060         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
2061         perf_pmu__parse_cleanup();
2062
2063         if (!ret && list_empty(&parse_state.list)) {
2064                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2065                 return -1;
2066         }
2067
2068         /*
2069          * Add list to the evlist even with errors to allow callers to clean up.
2070          */
2071         perf_evlist__splice_list_tail(evlist, &parse_state.list);
2072
2073         if (!ret) {
2074                 struct evsel *last;
2075
2076                 evlist->nr_groups += parse_state.nr_groups;
2077                 last = evlist__last(evlist);
2078                 last->cmdline_group_boundary = true;
2079
2080                 return 0;
2081         }
2082
2083         /*
2084          * There are 2 users - builtin-record and builtin-test objects.
2085          * Both call evlist__delete in case of error, so we dont
2086          * need to bother.
2087          */
2088         return ret;
2089 }
2090
2091 #define MAX_WIDTH 1000
2092 static int get_term_width(void)
2093 {
2094         struct winsize ws;
2095
2096         get_term_dimensions(&ws);
2097         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2098 }
2099
2100 static void __parse_events_print_error(int err_idx, const char *err_str,
2101                                 const char *err_help, const char *event)
2102 {
2103         const char *str = "invalid or unsupported event: ";
2104         char _buf[MAX_WIDTH];
2105         char *buf = (char *) event;
2106         int idx = 0;
2107         if (err_str) {
2108                 /* -2 for extra '' in the final fprintf */
2109                 int width       = get_term_width() - 2;
2110                 int len_event   = strlen(event);
2111                 int len_str, max_len, cut = 0;
2112
2113                 /*
2114                  * Maximum error index indent, we will cut
2115                  * the event string if it's bigger.
2116                  */
2117                 int max_err_idx = 13;
2118
2119                 /*
2120                  * Let's be specific with the message when
2121                  * we have the precise error.
2122                  */
2123                 str     = "event syntax error: ";
2124                 len_str = strlen(str);
2125                 max_len = width - len_str;
2126
2127                 buf = _buf;
2128
2129                 /* We're cutting from the beginning. */
2130                 if (err_idx > max_err_idx)
2131                         cut = err_idx - max_err_idx;
2132
2133                 strncpy(buf, event + cut, max_len);
2134
2135                 /* Mark cut parts with '..' on both sides. */
2136                 if (cut)
2137                         buf[0] = buf[1] = '.';
2138
2139                 if ((len_event - cut) > max_len) {
2140                         buf[max_len - 1] = buf[max_len - 2] = '.';
2141                         buf[max_len] = 0;
2142                 }
2143
2144                 idx = len_str + err_idx - cut;
2145         }
2146
2147         fprintf(stderr, "%s'%s'\n", str, buf);
2148         if (idx) {
2149                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2150                 if (err_help)
2151                         fprintf(stderr, "\n%s\n", err_help);
2152         }
2153 }
2154
2155 void parse_events_print_error(struct parse_events_error *err,
2156                               const char *event)
2157 {
2158         if (!err->num_errors)
2159                 return;
2160
2161         __parse_events_print_error(err->idx, err->str, err->help, event);
2162         zfree(&err->str);
2163         zfree(&err->help);
2164
2165         if (err->num_errors > 1) {
2166                 fputs("\nInitial error:\n", stderr);
2167                 __parse_events_print_error(err->first_idx, err->first_str,
2168                                         err->first_help, event);
2169                 zfree(&err->first_str);
2170                 zfree(&err->first_help);
2171         }
2172 }
2173
2174 #undef MAX_WIDTH
2175
2176 int parse_events_option(const struct option *opt, const char *str,
2177                         int unset __maybe_unused)
2178 {
2179         struct evlist *evlist = *(struct evlist **)opt->value;
2180         struct parse_events_error err;
2181         int ret;
2182
2183         bzero(&err, sizeof(err));
2184         ret = parse_events(evlist, str, &err);
2185
2186         if (ret) {
2187                 parse_events_print_error(&err, str);
2188                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2189         }
2190
2191         return ret;
2192 }
2193
2194 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2195 {
2196         struct evlist **evlistp = opt->value;
2197         int ret;
2198
2199         if (*evlistp == NULL) {
2200                 *evlistp = evlist__new();
2201
2202                 if (*evlistp == NULL) {
2203                         fprintf(stderr, "Not enough memory to create evlist\n");
2204                         return -1;
2205                 }
2206         }
2207
2208         ret = parse_events_option(opt, str, unset);
2209         if (ret) {
2210                 evlist__delete(*evlistp);
2211                 *evlistp = NULL;
2212         }
2213
2214         return ret;
2215 }
2216
2217 static int
2218 foreach_evsel_in_last_glob(struct evlist *evlist,
2219                            int (*func)(struct evsel *evsel,
2220                                        const void *arg),
2221                            const void *arg)
2222 {
2223         struct evsel *last = NULL;
2224         int err;
2225
2226         /*
2227          * Don't return when list_empty, give func a chance to report
2228          * error when it found last == NULL.
2229          *
2230          * So no need to WARN here, let *func do this.
2231          */
2232         if (evlist->core.nr_entries > 0)
2233                 last = evlist__last(evlist);
2234
2235         do {
2236                 err = (*func)(last, arg);
2237                 if (err)
2238                         return -1;
2239                 if (!last)
2240                         return 0;
2241
2242                 if (last->core.node.prev == &evlist->core.entries)
2243                         return 0;
2244                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2245         } while (!last->cmdline_group_boundary);
2246
2247         return 0;
2248 }
2249
2250 static int set_filter(struct evsel *evsel, const void *arg)
2251 {
2252         const char *str = arg;
2253         bool found = false;
2254         int nr_addr_filters = 0;
2255         struct perf_pmu *pmu = NULL;
2256
2257         if (evsel == NULL) {
2258                 fprintf(stderr,
2259                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2260                 return -1;
2261         }
2262
2263         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2264                 if (evsel__append_tp_filter(evsel, str) < 0) {
2265                         fprintf(stderr,
2266                                 "not enough memory to hold filter string\n");
2267                         return -1;
2268                 }
2269
2270                 return 0;
2271         }
2272
2273         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2274                 if (pmu->type == evsel->core.attr.type) {
2275                         found = true;
2276                         break;
2277                 }
2278
2279         if (found)
2280                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2281                                     "%d", &nr_addr_filters);
2282
2283         if (!nr_addr_filters) {
2284                 fprintf(stderr,
2285                         "This CPU does not support address filtering\n");
2286                 return -1;
2287         }
2288
2289         if (evsel__append_addr_filter(evsel, str) < 0) {
2290                 fprintf(stderr,
2291                         "not enough memory to hold filter string\n");
2292                 return -1;
2293         }
2294
2295         return 0;
2296 }
2297
2298 int parse_filter(const struct option *opt, const char *str,
2299                  int unset __maybe_unused)
2300 {
2301         struct evlist *evlist = *(struct evlist **)opt->value;
2302
2303         return foreach_evsel_in_last_glob(evlist, set_filter,
2304                                           (const void *)str);
2305 }
2306
2307 static int add_exclude_perf_filter(struct evsel *evsel,
2308                                    const void *arg __maybe_unused)
2309 {
2310         char new_filter[64];
2311
2312         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2313                 fprintf(stderr,
2314                         "--exclude-perf option should follow a -e tracepoint option\n");
2315                 return -1;
2316         }
2317
2318         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2319
2320         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2321                 fprintf(stderr,
2322                         "not enough memory to hold filter string\n");
2323                 return -1;
2324         }
2325
2326         return 0;
2327 }
2328
2329 int exclude_perf(const struct option *opt,
2330                  const char *arg __maybe_unused,
2331                  int unset __maybe_unused)
2332 {
2333         struct evlist *evlist = *(struct evlist **)opt->value;
2334
2335         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2336                                           NULL);
2337 }
2338
2339 static const char * const event_type_descriptors[] = {
2340         "Hardware event",
2341         "Software event",
2342         "Tracepoint event",
2343         "Hardware cache event",
2344         "Raw hardware event descriptor",
2345         "Hardware breakpoint",
2346 };
2347
2348 static int cmp_string(const void *a, const void *b)
2349 {
2350         const char * const *as = a;
2351         const char * const *bs = b;
2352
2353         return strcmp(*as, *bs);
2354 }
2355
2356 /*
2357  * Print the events from <debugfs_mount_point>/tracing/events
2358  */
2359
2360 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2361                              bool name_only)
2362 {
2363         DIR *sys_dir, *evt_dir;
2364         struct dirent *sys_dirent, *evt_dirent;
2365         char evt_path[MAXPATHLEN];
2366         char *dir_path;
2367         char **evt_list = NULL;
2368         unsigned int evt_i = 0, evt_num = 0;
2369         bool evt_num_known = false;
2370
2371 restart:
2372         sys_dir = tracing_events__opendir();
2373         if (!sys_dir)
2374                 return;
2375
2376         if (evt_num_known) {
2377                 evt_list = zalloc(sizeof(char *) * evt_num);
2378                 if (!evt_list)
2379                         goto out_close_sys_dir;
2380         }
2381
2382         for_each_subsystem(sys_dir, sys_dirent) {
2383                 if (subsys_glob != NULL &&
2384                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2385                         continue;
2386
2387                 dir_path = get_events_file(sys_dirent->d_name);
2388                 if (!dir_path)
2389                         continue;
2390                 evt_dir = opendir(dir_path);
2391                 if (!evt_dir)
2392                         goto next;
2393
2394                 for_each_event(dir_path, evt_dir, evt_dirent) {
2395                         if (event_glob != NULL &&
2396                             !strglobmatch(evt_dirent->d_name, event_glob))
2397                                 continue;
2398
2399                         if (!evt_num_known) {
2400                                 evt_num++;
2401                                 continue;
2402                         }
2403
2404                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2405                                  sys_dirent->d_name, evt_dirent->d_name);
2406
2407                         evt_list[evt_i] = strdup(evt_path);
2408                         if (evt_list[evt_i] == NULL) {
2409                                 put_events_file(dir_path);
2410                                 goto out_close_evt_dir;
2411                         }
2412                         evt_i++;
2413                 }
2414                 closedir(evt_dir);
2415 next:
2416                 put_events_file(dir_path);
2417         }
2418         closedir(sys_dir);
2419
2420         if (!evt_num_known) {
2421                 evt_num_known = true;
2422                 goto restart;
2423         }
2424         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2425         evt_i = 0;
2426         while (evt_i < evt_num) {
2427                 if (name_only) {
2428                         printf("%s ", evt_list[evt_i++]);
2429                         continue;
2430                 }
2431                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2432                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2433         }
2434         if (evt_num && pager_in_use())
2435                 printf("\n");
2436
2437 out_free:
2438         evt_num = evt_i;
2439         for (evt_i = 0; evt_i < evt_num; evt_i++)
2440                 zfree(&evt_list[evt_i]);
2441         zfree(&evt_list);
2442         return;
2443
2444 out_close_evt_dir:
2445         closedir(evt_dir);
2446 out_close_sys_dir:
2447         closedir(sys_dir);
2448
2449         printf("FATAL: not enough memory to print %s\n",
2450                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2451         if (evt_list)
2452                 goto out_free;
2453 }
2454
2455 /*
2456  * Check whether event is in <debugfs_mount_point>/tracing/events
2457  */
2458
2459 int is_valid_tracepoint(const char *event_string)
2460 {
2461         DIR *sys_dir, *evt_dir;
2462         struct dirent *sys_dirent, *evt_dirent;
2463         char evt_path[MAXPATHLEN];
2464         char *dir_path;
2465
2466         sys_dir = tracing_events__opendir();
2467         if (!sys_dir)
2468                 return 0;
2469
2470         for_each_subsystem(sys_dir, sys_dirent) {
2471                 dir_path = get_events_file(sys_dirent->d_name);
2472                 if (!dir_path)
2473                         continue;
2474                 evt_dir = opendir(dir_path);
2475                 if (!evt_dir)
2476                         goto next;
2477
2478                 for_each_event(dir_path, evt_dir, evt_dirent) {
2479                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2480                                  sys_dirent->d_name, evt_dirent->d_name);
2481                         if (!strcmp(evt_path, event_string)) {
2482                                 closedir(evt_dir);
2483                                 closedir(sys_dir);
2484                                 return 1;
2485                         }
2486                 }
2487                 closedir(evt_dir);
2488 next:
2489                 put_events_file(dir_path);
2490         }
2491         closedir(sys_dir);
2492         return 0;
2493 }
2494
2495 static bool is_event_supported(u8 type, unsigned config)
2496 {
2497         bool ret = true;
2498         int open_return;
2499         struct evsel *evsel;
2500         struct perf_event_attr attr = {
2501                 .type = type,
2502                 .config = config,
2503                 .disabled = 1,
2504         };
2505         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2506
2507         if (tmap == NULL)
2508                 return false;
2509
2510         evsel = evsel__new(&attr);
2511         if (evsel) {
2512                 open_return = evsel__open(evsel, NULL, tmap);
2513                 ret = open_return >= 0;
2514
2515                 if (open_return == -EACCES) {
2516                         /*
2517                          * This happens if the paranoid value
2518                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2519                          * Re-run with exclude_kernel set; we don't do that
2520                          * by default as some ARM machines do not support it.
2521                          *
2522                          */
2523                         evsel->core.attr.exclude_kernel = 1;
2524                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2525                 }
2526                 evsel__delete(evsel);
2527         }
2528
2529         perf_thread_map__put(tmap);
2530         return ret;
2531 }
2532
2533 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2534                       bool name_only)
2535 {
2536         struct probe_cache *pcache;
2537         struct probe_cache_entry *ent;
2538         struct strlist *bidlist, *sdtlist;
2539         struct strlist_config cfg = {.dont_dupstr = true};
2540         struct str_node *nd, *nd2;
2541         char *buf, *path, *ptr = NULL;
2542         bool show_detail = false;
2543         int ret;
2544
2545         sdtlist = strlist__new(NULL, &cfg);
2546         if (!sdtlist) {
2547                 pr_debug("Failed to allocate new strlist for SDT\n");
2548                 return;
2549         }
2550         bidlist = build_id_cache__list_all(true);
2551         if (!bidlist) {
2552                 pr_debug("Failed to get buildids: %d\n", errno);
2553                 return;
2554         }
2555         strlist__for_each_entry(nd, bidlist) {
2556                 pcache = probe_cache__new(nd->s, NULL);
2557                 if (!pcache)
2558                         continue;
2559                 list_for_each_entry(ent, &pcache->entries, node) {
2560                         if (!ent->sdt)
2561                                 continue;
2562                         if (subsys_glob &&
2563                             !strglobmatch(ent->pev.group, subsys_glob))
2564                                 continue;
2565                         if (event_glob &&
2566                             !strglobmatch(ent->pev.event, event_glob))
2567                                 continue;
2568                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2569                                         ent->pev.event, nd->s);
2570                         if (ret > 0)
2571                                 strlist__add(sdtlist, buf);
2572                 }
2573                 probe_cache__delete(pcache);
2574         }
2575         strlist__delete(bidlist);
2576
2577         strlist__for_each_entry(nd, sdtlist) {
2578                 buf = strchr(nd->s, '@');
2579                 if (buf)
2580                         *(buf++) = '\0';
2581                 if (name_only) {
2582                         printf("%s ", nd->s);
2583                         continue;
2584                 }
2585                 nd2 = strlist__next(nd);
2586                 if (nd2) {
2587                         ptr = strchr(nd2->s, '@');
2588                         if (ptr)
2589                                 *ptr = '\0';
2590                         if (strcmp(nd->s, nd2->s) == 0)
2591                                 show_detail = true;
2592                 }
2593                 if (show_detail) {
2594                         path = build_id_cache__origname(buf);
2595                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2596                         if (ret > 0) {
2597                                 printf("  %-50s [%s]\n", buf, "SDT event");
2598                                 free(buf);
2599                         }
2600                         free(path);
2601                 } else
2602                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2603                 if (nd2) {
2604                         if (strcmp(nd->s, nd2->s) != 0)
2605                                 show_detail = false;
2606                         if (ptr)
2607                                 *ptr = '@';
2608                 }
2609         }
2610         strlist__delete(sdtlist);
2611 }
2612
2613 int print_hwcache_events(const char *event_glob, bool name_only)
2614 {
2615         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2616         char name[64];
2617         char **evt_list = NULL;
2618         bool evt_num_known = false;
2619
2620 restart:
2621         if (evt_num_known) {
2622                 evt_list = zalloc(sizeof(char *) * evt_num);
2623                 if (!evt_list)
2624                         goto out_enomem;
2625         }
2626
2627         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2628                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2629                         /* skip invalid cache type */
2630                         if (!perf_evsel__is_cache_op_valid(type, op))
2631                                 continue;
2632
2633                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2634                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2635                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2636                                         continue;
2637
2638                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2639                                                         type | (op << 8) | (i << 16)))
2640                                         continue;
2641
2642                                 if (!evt_num_known) {
2643                                         evt_num++;
2644                                         continue;
2645                                 }
2646
2647                                 evt_list[evt_i] = strdup(name);
2648                                 if (evt_list[evt_i] == NULL)
2649                                         goto out_enomem;
2650                                 evt_i++;
2651                         }
2652                 }
2653         }
2654
2655         if (!evt_num_known) {
2656                 evt_num_known = true;
2657                 goto restart;
2658         }
2659         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2660         evt_i = 0;
2661         while (evt_i < evt_num) {
2662                 if (name_only) {
2663                         printf("%s ", evt_list[evt_i++]);
2664                         continue;
2665                 }
2666                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2667                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2668         }
2669         if (evt_num && pager_in_use())
2670                 printf("\n");
2671
2672 out_free:
2673         evt_num = evt_i;
2674         for (evt_i = 0; evt_i < evt_num; evt_i++)
2675                 zfree(&evt_list[evt_i]);
2676         zfree(&evt_list);
2677         return evt_num;
2678
2679 out_enomem:
2680         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2681         if (evt_list)
2682                 goto out_free;
2683         return evt_num;
2684 }
2685
2686 static void print_tool_event(const char *name, const char *event_glob,
2687                              bool name_only)
2688 {
2689         if (event_glob && !strglobmatch(name, event_glob))
2690                 return;
2691         if (name_only)
2692                 printf("%s ", name);
2693         else
2694                 printf("  %-50s [%s]\n", name, "Tool event");
2695
2696 }
2697
2698 void print_tool_events(const char *event_glob, bool name_only)
2699 {
2700         print_tool_event("duration_time", event_glob, name_only);
2701         if (pager_in_use())
2702                 printf("\n");
2703 }
2704
2705 void print_symbol_events(const char *event_glob, unsigned type,
2706                                 struct event_symbol *syms, unsigned max,
2707                                 bool name_only)
2708 {
2709         unsigned int i, evt_i = 0, evt_num = 0;
2710         char name[MAX_NAME_LEN];
2711         char **evt_list = NULL;
2712         bool evt_num_known = false;
2713
2714 restart:
2715         if (evt_num_known) {
2716                 evt_list = zalloc(sizeof(char *) * evt_num);
2717                 if (!evt_list)
2718                         goto out_enomem;
2719                 syms -= max;
2720         }
2721
2722         for (i = 0; i < max; i++, syms++) {
2723
2724                 if (event_glob != NULL && syms->symbol != NULL &&
2725                     !(strglobmatch(syms->symbol, event_glob) ||
2726                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2727                         continue;
2728
2729                 if (!is_event_supported(type, i))
2730                         continue;
2731
2732                 if (!evt_num_known) {
2733                         evt_num++;
2734                         continue;
2735                 }
2736
2737                 if (!name_only && strlen(syms->alias))
2738                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2739                 else
2740                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2741
2742                 evt_list[evt_i] = strdup(name);
2743                 if (evt_list[evt_i] == NULL)
2744                         goto out_enomem;
2745                 evt_i++;
2746         }
2747
2748         if (!evt_num_known) {
2749                 evt_num_known = true;
2750                 goto restart;
2751         }
2752         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2753         evt_i = 0;
2754         while (evt_i < evt_num) {
2755                 if (name_only) {
2756                         printf("%s ", evt_list[evt_i++]);
2757                         continue;
2758                 }
2759                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2760         }
2761         if (evt_num && pager_in_use())
2762                 printf("\n");
2763
2764 out_free:
2765         evt_num = evt_i;
2766         for (evt_i = 0; evt_i < evt_num; evt_i++)
2767                 zfree(&evt_list[evt_i]);
2768         zfree(&evt_list);
2769         return;
2770
2771 out_enomem:
2772         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2773         if (evt_list)
2774                 goto out_free;
2775 }
2776
2777 /*
2778  * Print the help text for the event symbols:
2779  */
2780 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2781                         bool long_desc, bool details_flag, bool deprecated)
2782 {
2783         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2784                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2785
2786         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2787                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2788         print_tool_events(event_glob, name_only);
2789
2790         print_hwcache_events(event_glob, name_only);
2791
2792         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2793                         details_flag, deprecated);
2794
2795         if (event_glob != NULL)
2796                 return;
2797
2798         if (!name_only) {
2799                 printf("  %-50s [%s]\n",
2800                        "rNNN",
2801                        event_type_descriptors[PERF_TYPE_RAW]);
2802                 printf("  %-50s [%s]\n",
2803                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2804                        event_type_descriptors[PERF_TYPE_RAW]);
2805                 if (pager_in_use())
2806                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2807
2808                 printf("  %-50s [%s]\n",
2809                        "mem:<addr>[/len][:access]",
2810                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2811                 if (pager_in_use())
2812                         printf("\n");
2813         }
2814
2815         print_tracepoint_events(NULL, NULL, name_only);
2816
2817         print_sdt_events(NULL, NULL, name_only);
2818
2819         metricgroup__print(true, true, NULL, name_only, details_flag);
2820 }
2821
2822 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2823 {
2824         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2825 }
2826
2827 static int new_term(struct parse_events_term **_term,
2828                     struct parse_events_term *temp,
2829                     char *str, u64 num)
2830 {
2831         struct parse_events_term *term;
2832
2833         term = malloc(sizeof(*term));
2834         if (!term)
2835                 return -ENOMEM;
2836
2837         *term = *temp;
2838         INIT_LIST_HEAD(&term->list);
2839         term->weak = false;
2840
2841         switch (term->type_val) {
2842         case PARSE_EVENTS__TERM_TYPE_NUM:
2843                 term->val.num = num;
2844                 break;
2845         case PARSE_EVENTS__TERM_TYPE_STR:
2846                 term->val.str = str;
2847                 break;
2848         default:
2849                 free(term);
2850                 return -EINVAL;
2851         }
2852
2853         *_term = term;
2854         return 0;
2855 }
2856
2857 int parse_events_term__num(struct parse_events_term **term,
2858                            int type_term, char *config, u64 num,
2859                            bool no_value,
2860                            void *loc_term_, void *loc_val_)
2861 {
2862         YYLTYPE *loc_term = loc_term_;
2863         YYLTYPE *loc_val = loc_val_;
2864
2865         struct parse_events_term temp = {
2866                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2867                 .type_term = type_term,
2868                 .config    = config,
2869                 .no_value  = no_value,
2870                 .err_term  = loc_term ? loc_term->first_column : 0,
2871                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2872         };
2873
2874         return new_term(term, &temp, NULL, num);
2875 }
2876
2877 int parse_events_term__str(struct parse_events_term **term,
2878                            int type_term, char *config, char *str,
2879                            void *loc_term_, void *loc_val_)
2880 {
2881         YYLTYPE *loc_term = loc_term_;
2882         YYLTYPE *loc_val = loc_val_;
2883
2884         struct parse_events_term temp = {
2885                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2886                 .type_term = type_term,
2887                 .config    = config,
2888                 .err_term  = loc_term ? loc_term->first_column : 0,
2889                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2890         };
2891
2892         return new_term(term, &temp, str, 0);
2893 }
2894
2895 int parse_events_term__sym_hw(struct parse_events_term **term,
2896                               char *config, unsigned idx)
2897 {
2898         struct event_symbol *sym;
2899         char *str;
2900         struct parse_events_term temp = {
2901                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2902                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2903                 .config    = config,
2904         };
2905
2906         if (!temp.config) {
2907                 temp.config = strdup("event");
2908                 if (!temp.config)
2909                         return -ENOMEM;
2910         }
2911         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2912         sym = &event_symbols_hw[idx];
2913
2914         str = strdup(sym->symbol);
2915         if (!str)
2916                 return -ENOMEM;
2917         return new_term(term, &temp, str, 0);
2918 }
2919
2920 int parse_events_term__clone(struct parse_events_term **new,
2921                              struct parse_events_term *term)
2922 {
2923         char *str;
2924         struct parse_events_term temp = {
2925                 .type_val  = term->type_val,
2926                 .type_term = term->type_term,
2927                 .config    = NULL,
2928                 .err_term  = term->err_term,
2929                 .err_val   = term->err_val,
2930         };
2931
2932         if (term->config) {
2933                 temp.config = strdup(term->config);
2934                 if (!temp.config)
2935                         return -ENOMEM;
2936         }
2937         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
2938                 return new_term(new, &temp, NULL, term->val.num);
2939
2940         str = strdup(term->val.str);
2941         if (!str)
2942                 return -ENOMEM;
2943         return new_term(new, &temp, str, 0);
2944 }
2945
2946 void parse_events_term__delete(struct parse_events_term *term)
2947 {
2948         if (term->array.nr_ranges)
2949                 zfree(&term->array.ranges);
2950
2951         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
2952                 zfree(&term->val.str);
2953
2954         zfree(&term->config);
2955         free(term);
2956 }
2957
2958 int parse_events_copy_term_list(struct list_head *old,
2959                                  struct list_head **new)
2960 {
2961         struct parse_events_term *term, *n;
2962         int ret;
2963
2964         if (!old) {
2965                 *new = NULL;
2966                 return 0;
2967         }
2968
2969         *new = malloc(sizeof(struct list_head));
2970         if (!*new)
2971                 return -ENOMEM;
2972         INIT_LIST_HEAD(*new);
2973
2974         list_for_each_entry (term, old, list) {
2975                 ret = parse_events_term__clone(&n, term);
2976                 if (ret)
2977                         return ret;
2978                 list_add_tail(&n->list, *new);
2979         }
2980         return 0;
2981 }
2982
2983 void parse_events_terms__purge(struct list_head *terms)
2984 {
2985         struct parse_events_term *term, *h;
2986
2987         list_for_each_entry_safe(term, h, terms, list) {
2988                 list_del_init(&term->list);
2989                 parse_events_term__delete(term);
2990         }
2991 }
2992
2993 void parse_events_terms__delete(struct list_head *terms)
2994 {
2995         if (!terms)
2996                 return;
2997         parse_events_terms__purge(terms);
2998         free(terms);
2999 }
3000
3001 void parse_events__clear_array(struct parse_events_array *a)
3002 {
3003         zfree(&a->ranges);
3004 }
3005
3006 void parse_events_evlist_error(struct parse_events_state *parse_state,
3007                                int idx, const char *str)
3008 {
3009         if (!parse_state->error)
3010                 return;
3011
3012         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3013 }
3014
3015 static void config_terms_list(char *buf, size_t buf_sz)
3016 {
3017         int i;
3018         bool first = true;
3019
3020         buf[0] = '\0';
3021         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3022                 const char *name = config_term_names[i];
3023
3024                 if (!config_term_avail(i, NULL))
3025                         continue;
3026                 if (!name)
3027                         continue;
3028                 if (name[0] == '<')
3029                         continue;
3030
3031                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3032                         return;
3033
3034                 if (!first)
3035                         strcat(buf, ",");
3036                 else
3037                         first = false;
3038                 strcat(buf, name);
3039         }
3040 }
3041
3042 /*
3043  * Return string contains valid config terms of an event.
3044  * @additional_terms: For terms such as PMU sysfs terms.
3045  */
3046 char *parse_events_formats_error_string(char *additional_terms)
3047 {
3048         char *str;
3049         /* "no-overwrite" is the longest name */
3050         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3051                           (sizeof("no-overwrite") - 1)];
3052
3053         config_terms_list(static_terms, sizeof(static_terms));
3054         /* valid terms */
3055         if (additional_terms) {
3056                 if (asprintf(&str, "valid terms: %s,%s",
3057                              additional_terms, static_terms) < 0)
3058                         goto fail;
3059         } else {
3060                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3061                         goto fail;
3062         }
3063         return str;
3064
3065 fail:
3066         return NULL;
3067 }