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 = 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[][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 < 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, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 448         if (cache_type == -1)
 449                 return -EINVAL;
 450
 451         config_name = get_config_name(head_config);
 452         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 453
 454         for (i = 0; (i < 2) && (op_result[i]); i++) {
 455                 char *str = op_result[i];
 456
 457                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 458
 459                 if (cache_op == -1) {
 460                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 461                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 462                         if (cache_op >= 0) {
 463                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 464                                         return -EINVAL;
 465                                 continue;
 466                         }
 467                 }
 468
 469                 if (cache_result == -1) {
 470                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 471                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 472                         if (cache_result >= 0)
 473                                 continue;
 474                 }
 475         }
 476
 477         /*
 478          * Fall back to reads:
 479          */
 480         if (cache_op == -1)
 481                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 482
 483         /*
 484          * Fall back to accesses:
 485          */
 486         if (cache_result == -1)
 487                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 488
 489         memset(&attr, 0, sizeof(attr));
 490         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 491         attr.type = PERF_TYPE_HW_CACHE;
 492
 493         if (head_config) {
 494                 if (config_attr(&attr, head_config, err,
 495                                 config_term_common))
 496                         return -EINVAL;
 497
 498                 if (get_config_terms(head_config, &config_terms))
 499                         return -ENOMEM;
 500         }
 501         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 502 }
 503
 504 static void tracepoint_error(struct parse_events_error *e, int err,
 505                              const char *sys, const char *name)
 506 {
 507         const char *str;
 508         char help[BUFSIZ];
 509
 510         if (!e)
 511                 return;
 512
 513         /*
 514          * We get error directly from syscall errno ( > 0),
 515          * or from encoded pointer's error ( < 0).
 516          */
 517         err = abs(err);
 518
 519         switch (err) {
 520         case EACCES:
 521                 str = "can't access trace events";
 522                 break;
 523         case ENOENT:
 524                 str = "unknown tracepoint";
 525                 break;
 526         default:
 527                 str = "failed to add tracepoint";
 528                 break;
 529         }
 530
 531         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 532         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 533 }
 534
 535 static int add_tracepoint(struct list_head *list, int *idx,
 536                           const char *sys_name, const char *evt_name,
 537                           struct parse_events_error *err,
 538                           struct list_head *head_config)
 539 {
 540         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 541
 542         if (IS_ERR(evsel)) {
 543                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 544                 return PTR_ERR(evsel);
 545         }
 546
 547         if (head_config) {
 548                 LIST_HEAD(config_terms);
 549
 550                 if (get_config_terms(head_config, &config_terms))
 551                         return -ENOMEM;
 552                 list_splice(&config_terms, &evsel->config_terms);
 553         }
 554
 555         list_add_tail(&evsel->core.node, list);
 556         return 0;
 557 }
 558
 559 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 560                                       const char *sys_name, const char *evt_name,
 561                                       struct parse_events_error *err,
 562                                       struct list_head *head_config)
 563 {
 564         char *evt_path;
 565         struct dirent *evt_ent;
 566         DIR *evt_dir;
 567         int ret = 0, found = 0;
 568
 569         evt_path = get_events_file(sys_name);
 570         if (!evt_path) {
 571                 tracepoint_error(err, errno, sys_name, evt_name);
 572                 return -1;
 573         }
 574         evt_dir = opendir(evt_path);
 575         if (!evt_dir) {
 576                 put_events_file(evt_path);
 577                 tracepoint_error(err, errno, sys_name, evt_name);
 578                 return -1;
 579         }
 580
 581         while (!ret && (evt_ent = readdir(evt_dir))) {
 582                 if (!strcmp(evt_ent->d_name, ".")
 583                     || !strcmp(evt_ent->d_name, "..")
 584                     || !strcmp(evt_ent->d_name, "enable")
 585                     || !strcmp(evt_ent->d_name, "filter"))
 586                         continue;
 587
 588                 if (!strglobmatch(evt_ent->d_name, evt_name))
 589                         continue;
 590
 591                 found++;
 592
 593                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 594                                      err, head_config);
 595         }
 596
 597         if (!found) {
 598                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 599                 ret = -1;
 600         }
 601
 602         put_events_file(evt_path);
 603         closedir(evt_dir);
 604         return ret;
 605 }
 606
 607 static int add_tracepoint_event(struct list_head *list, int *idx,
 608                                 const char *sys_name, const char *evt_name,
 609                                 struct parse_events_error *err,
 610                                 struct list_head *head_config)
 611 {
 612         return strpbrk(evt_name, "*?") ?
 613                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 614                                           err, head_config) :
 615                add_tracepoint(list, idx, sys_name, evt_name,
 616                               err, head_config);
 617 }
 618
 619 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 620                                     const char *sys_name, const char *evt_name,
 621                                     struct parse_events_error *err,
 622                                     struct list_head *head_config)
 623 {
 624         struct dirent *events_ent;
 625         DIR *events_dir;
 626         int ret = 0;
 627
 628         events_dir = tracing_events__opendir();
 629         if (!events_dir) {
 630                 tracepoint_error(err, errno, sys_name, evt_name);
 631                 return -1;
 632         }
 633
 634         while (!ret && (events_ent = readdir(events_dir))) {
 635                 if (!strcmp(events_ent->d_name, ".")
 636                     || !strcmp(events_ent->d_name, "..")
 637                     || !strcmp(events_ent->d_name, "enable")
 638                     || !strcmp(events_ent->d_name, "header_event")
 639                     || !strcmp(events_ent->d_name, "header_page"))
 640                         continue;
 641
 642                 if (!strglobmatch(events_ent->d_name, sys_name))
 643                         continue;
 644
 645                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 646                                            evt_name, err, head_config);
 647         }
 648
 649         closedir(events_dir);
 650         return ret;
 651 }
 652
 653 struct __add_bpf_event_param {
 654         struct parse_events_state *parse_state;
 655         struct list_head *list;
 656         struct list_head *head_config;
 657 };
 658
 659 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 660                          void *_param)
 661 {
 662         LIST_HEAD(new_evsels);
 663         struct __add_bpf_event_param *param = _param;
 664         struct parse_events_state *parse_state = param->parse_state;
 665         struct list_head *list = param->list;
 666         struct evsel *pos;
 667         int err;
 668         /*
 669          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 670          * then don't add the tracepoint, this will be used for something else, like
 671          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 672          *
 673          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 674          */
 675         if (group[0] == '!')
 676                 return 0;
 677
 678         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 679                  group, event, fd);
 680
 681         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 682                                           event, parse_state->error,
 683                                           param->head_config);
 684         if (err) {
 685                 struct evsel *evsel, *tmp;
 686
 687                 pr_debug("Failed to add BPF event %s:%s\n",
 688                          group, event);
 689                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 690                         list_del_init(&evsel->core.node);
 691                         evsel__delete(evsel);
 692                 }
 693                 return err;
 694         }
 695         pr_debug("adding %s:%s\n", group, event);
 696
 697         list_for_each_entry(pos, &new_evsels, core.node) {
 698                 pr_debug("adding %s:%s to %p\n",
 699                          group, event, pos);
 700                 pos->bpf_fd = fd;
 701                 pos->bpf_obj = obj;
 702         }
 703         list_splice(&new_evsels, list);
 704         return 0;
 705 }
 706
 707 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 708                               struct list_head *list,
 709                               struct bpf_object *obj,
 710                               struct list_head *head_config)
 711 {
 712         int err;
 713         char errbuf[BUFSIZ];
 714         struct __add_bpf_event_param param = {parse_state, list, head_config};
 715         static bool registered_unprobe_atexit = false;
 716
 717         if (IS_ERR(obj) || !obj) {
 718                 snprintf(errbuf, sizeof(errbuf),
 719                          "Internal error: load bpf obj with NULL");
 720                 err = -EINVAL;
 721                 goto errout;
 722         }
 723
 724         /*
 725          * Register atexit handler before calling bpf__probe() so
 726          * bpf__probe() don't need to unprobe probe points its already
 727          * created when failure.
 728          */
 729         if (!registered_unprobe_atexit) {
 730                 atexit(bpf__clear);
 731                 registered_unprobe_atexit = true;
 732         }
 733
 734         err = bpf__probe(obj);
 735         if (err) {
 736                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 737                 goto errout;
 738         }
 739
 740         err = bpf__load(obj);
 741         if (err) {
 742                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 743                 goto errout;
 744         }
 745
 746         err = bpf__foreach_event(obj, add_bpf_event, &param);
 747         if (err) {
 748                 snprintf(errbuf, sizeof(errbuf),
 749                          "Attach events in BPF object failed");
 750                 goto errout;
 751         }
 752
 753         return 0;
 754 errout:
 755         parse_state->error->help = strdup("(add -v to see detail)");
 756         parse_state->error->str = strdup(errbuf);
 757         return err;
 758 }
 759
 760 static int
 761 parse_events_config_bpf(struct parse_events_state *parse_state,
 762                         struct bpf_object *obj,
 763                         struct list_head *head_config)
 764 {
 765         struct parse_events_term *term;
 766         int error_pos;
 767
 768         if (!head_config || list_empty(head_config))
 769                 return 0;
 770
 771         list_for_each_entry(term, head_config, list) {
 772                 char errbuf[BUFSIZ];
 773                 int err;
 774
 775                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 776                         snprintf(errbuf, sizeof(errbuf),
 777                                  "Invalid config term for BPF object");
 778                         errbuf[BUFSIZ - 1] = '\0';
 779
 780                         parse_state->error->idx = term->err_term;
 781                         parse_state->error->str = strdup(errbuf);
 782                         return -EINVAL;
 783                 }
 784
 785                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 786                 if (err) {
 787                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 788                                                  &error_pos, err, errbuf,
 789                                                  sizeof(errbuf));
 790                         parse_state->error->help = strdup(
 791 "Hint:\tValid config terms:\n"
 792 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 793 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 794 "\n"
 795 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 796 "     \t(add -v to see detail)");
 797                         parse_state->error->str = strdup(errbuf);
 798                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 799                                 parse_state->error->idx = term->err_val;
 800                         else
 801                                 parse_state->error->idx = term->err_term + error_pos;
 802                         return err;
 803                 }
 804         }
 805         return 0;
 806 }
 807
 808 /*
 809  * Split config terms:
 810  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 811  *  'call-graph=fp' is 'evt config', should be applied to each
 812  *  events in bpf.c.
 813  * 'map:array.value[0]=1' is 'obj config', should be processed
 814  * with parse_events_config_bpf.
 815  *
 816  * Move object config terms from the first list to obj_head_config.
 817  */
 818 static void
 819 split_bpf_config_terms(struct list_head *evt_head_config,
 820                        struct list_head *obj_head_config)
 821 {
 822         struct parse_events_term *term, *temp;
 823
 824         /*
 825          * Currectly, all possible user config term
 826          * belong to bpf object. parse_events__is_hardcoded_term()
 827          * happends to be a good flag.
 828          *
 829          * See parse_events_config_bpf() and
 830          * config_term_tracepoint().
 831          */
 832         list_for_each_entry_safe(term, temp, evt_head_config, list)
 833                 if (!parse_events__is_hardcoded_term(term))
 834                         list_move_tail(&term->list, obj_head_config);
 835 }
 836
 837 int parse_events_load_bpf(struct parse_events_state *parse_state,
 838                           struct list_head *list,
 839                           char *bpf_file_name,
 840                           bool source,
 841                           struct list_head *head_config)
 842 {
 843         int err;
 844         struct bpf_object *obj;
 845         LIST_HEAD(obj_head_config);
 846
 847         if (head_config)
 848                 split_bpf_config_terms(head_config, &obj_head_config);
 849
 850         obj = bpf__prepare_load(bpf_file_name, source);
 851         if (IS_ERR(obj)) {
 852                 char errbuf[BUFSIZ];
 853
 854                 err = PTR_ERR(obj);
 855
 856                 if (err == -ENOTSUP)
 857                         snprintf(errbuf, sizeof(errbuf),
 858                                  "BPF support is not compiled");
 859                 else
 860                         bpf__strerror_prepare_load(bpf_file_name,
 861                                                    source,
 862                                                    -err, errbuf,
 863                                                    sizeof(errbuf));
 864
 865                 parse_state->error->help = strdup("(add -v to see detail)");
 866                 parse_state->error->str = strdup(errbuf);
 867                 return err;
 868         }
 869
 870         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 871         if (err)
 872                 return err;
 873         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 874
 875         /*
 876          * Caller doesn't know anything about obj_head_config,
 877          * so combine them together again before returnning.
 878          */
 879         if (head_config)
 880                 list_splice_tail(&obj_head_config, head_config);
 881         return err;
 882 }
 883
 884 static int
 885 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 886 {
 887         int i;
 888
 889         for (i = 0; i < 3; i++) {
 890                 if (!type || !type[i])
 891                         break;
 892
 893 #define CHECK_SET_TYPE(bit)             \
 894 do {                                    \
 895         if (attr->bp_type & bit)        \
 896                 return -EINVAL;         \
 897         else                            \
 898                 attr->bp_type |= bit;   \
 899 } while (0)
 900
 901                 switch (type[i]) {
 902                 case 'r':
 903                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 904                         break;
 905                 case 'w':
 906                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 907                         break;
 908                 case 'x':
 909                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 910                         break;
 911                 default:
 912                         return -EINVAL;
 913                 }
 914         }
 915
 916 #undef CHECK_SET_TYPE
 917
 918         if (!attr->bp_type) /* Default */
 919                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 920
 921         return 0;
 922 }
 923
 924 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 925                                 void *ptr, char *type, u64 len)
 926 {
 927         struct perf_event_attr attr;
 928
 929         memset(&attr, 0, sizeof(attr));
 930         attr.bp_addr = (unsigned long) ptr;
 931
 932         if (parse_breakpoint_type(type, &attr))
 933                 return -EINVAL;
 934
 935         /* Provide some defaults if len is not specified */
 936         if (!len) {
 937                 if (attr.bp_type == HW_BREAKPOINT_X)
 938                         len = sizeof(long);
 939                 else
 940                         len = HW_BREAKPOINT_LEN_4;
 941         }
 942
 943         attr.bp_len = len;
 944
 945         attr.type = PERF_TYPE_BREAKPOINT;
 946         attr.sample_period = 1;
 947
 948         return add_event(list, idx, &attr, NULL, NULL);
 949 }
 950
 951 static int check_type_val(struct parse_events_term *term,
 952                           struct parse_events_error *err,
 953                           int type)
 954 {
 955         if (type == term->type_val)
 956                 return 0;
 957
 958         if (err) {
 959                 parse_events__handle_error(err, term->err_val,
 960                                         type == PARSE_EVENTS__TERM_TYPE_NUM
 961                                         ? strdup("expected numeric value")
 962                                         : strdup("expected string value"),
 963                                         NULL);
 964         }
 965         return -EINVAL;
 966 }
 967
 968 /*
 969  * Update according to parse-events.l
 970  */
 971 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 972         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 973         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 974         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 975         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 976         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 977         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 978         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 979         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 980         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 981         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 982         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 983         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 984         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 985         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 986         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
 987         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 988         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 989         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 990         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
 991         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
 992         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
 993 };
 994
 995 static bool config_term_shrinked;
 996
 997 static bool
 998 config_term_avail(int term_type, struct parse_events_error *err)
 999 {
1000         char *err_str;
1001
1002         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1003                 parse_events__handle_error(err, -1,
1004                                         strdup("Invalid term_type"), NULL);
1005                 return false;
1006         }
1007         if (!config_term_shrinked)
1008                 return true;
1009
1010         switch (term_type) {
1011         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1012         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1013         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1014         case PARSE_EVENTS__TERM_TYPE_NAME:
1015         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1016         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1017                 return true;
1018         default:
1019                 if (!err)
1020                         return false;
1021
1022                 /* term_type is validated so indexing is safe */
1023                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1024                                 config_term_names[term_type]) >= 0)
1025                         parse_events__handle_error(err, -1, err_str, NULL);
1026                 return false;
1027         }
1028 }
1029
1030 void parse_events__shrink_config_terms(void)
1031 {
1032         config_term_shrinked = true;
1033 }
1034
1035 static int config_term_common(struct perf_event_attr *attr,
1036                               struct parse_events_term *term,
1037                               struct parse_events_error *err)
1038 {
1039 #define CHECK_TYPE_VAL(type)                                               \
1040 do {                                                                       \
1041         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1042                 return -EINVAL;                                            \
1043 } while (0)
1044
1045         switch (term->type_term) {
1046         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1047                 CHECK_TYPE_VAL(NUM);
1048                 attr->config = term->val.num;
1049                 break;
1050         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1051                 CHECK_TYPE_VAL(NUM);
1052                 attr->config1 = term->val.num;
1053                 break;
1054         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1055                 CHECK_TYPE_VAL(NUM);
1056                 attr->config2 = term->val.num;
1057                 break;
1058         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1059                 CHECK_TYPE_VAL(NUM);
1060                 break;
1061         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1062                 CHECK_TYPE_VAL(NUM);
1063                 break;
1064         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1065                 CHECK_TYPE_VAL(STR);
1066                 if (strcmp(term->val.str, "no") &&
1067                     parse_branch_str(term->val.str,
1068                                     &attr->branch_sample_type)) {
1069                         parse_events__handle_error(err, term->err_val,
1070                                         strdup("invalid branch sample type"),
1071                                         NULL);
1072                         return -EINVAL;
1073                 }
1074                 break;
1075         case PARSE_EVENTS__TERM_TYPE_TIME:
1076                 CHECK_TYPE_VAL(NUM);
1077                 if (term->val.num > 1) {
1078                         parse_events__handle_error(err, term->err_val,
1079                                                 strdup("expected 0 or 1"),
1080                                                 NULL);
1081                         return -EINVAL;
1082                 }
1083                 break;
1084         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1085                 CHECK_TYPE_VAL(STR);
1086                 break;
1087         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1088                 CHECK_TYPE_VAL(NUM);
1089                 break;
1090         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1091                 CHECK_TYPE_VAL(NUM);
1092                 break;
1093         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1094                 CHECK_TYPE_VAL(NUM);
1095                 break;
1096         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1097                 CHECK_TYPE_VAL(NUM);
1098                 break;
1099         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1100                 CHECK_TYPE_VAL(NUM);
1101                 break;
1102         case PARSE_EVENTS__TERM_TYPE_NAME:
1103                 CHECK_TYPE_VAL(STR);
1104                 break;
1105         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1106                 CHECK_TYPE_VAL(NUM);
1107                 break;
1108         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1109                 CHECK_TYPE_VAL(NUM);
1110                 break;
1111         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1112                 CHECK_TYPE_VAL(NUM);
1113                 if ((unsigned int)term->val.num > 1) {
1114                         parse_events__handle_error(err, term->err_val,
1115                                                 strdup("expected 0 or 1"),
1116                                                 NULL);
1117                         return -EINVAL;
1118                 }
1119                 break;
1120         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1121                 CHECK_TYPE_VAL(NUM);
1122                 break;
1123         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1124                 CHECK_TYPE_VAL(NUM);
1125                 if (term->val.num > UINT_MAX) {
1126                         parse_events__handle_error(err, term->err_val,
1127                                                 strdup("too big"),
1128                                                 NULL);
1129                         return -EINVAL;
1130                 }
1131                 break;
1132         default:
1133                 parse_events__handle_error(err, term->err_term,
1134                                 strdup("unknown term"),
1135                                 parse_events_formats_error_string(NULL));
1136                 return -EINVAL;
1137         }
1138
1139         /*
1140          * Check term availbility after basic checking so
1141          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1142          *
1143          * If check availbility at the entry of this function,
1144          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1145          * if an invalid config term is provided for legacy events
1146          * (for example, instructions/badterm/...), which is confusing.
1147          */
1148         if (!config_term_avail(term->type_term, err))
1149                 return -EINVAL;
1150         return 0;
1151 #undef CHECK_TYPE_VAL
1152 }
1153
1154 static int config_term_pmu(struct perf_event_attr *attr,
1155                            struct parse_events_term *term,
1156                            struct parse_events_error *err)
1157 {
1158         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1159             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1160                 /*
1161                  * Always succeed for sysfs terms, as we dont know
1162                  * at this point what type they need to have.
1163                  */
1164                 return 0;
1165         else
1166                 return config_term_common(attr, term, err);
1167 }
1168
1169 static int config_term_tracepoint(struct perf_event_attr *attr,
1170                                   struct parse_events_term *term,
1171                                   struct parse_events_error *err)
1172 {
1173         switch (term->type_term) {
1174         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1175         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1176         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1177         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1178         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1179         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1180         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1181         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1182         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1183         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1184                 return config_term_common(attr, term, err);
1185         default:
1186                 if (err) {
1187                         parse_events__handle_error(err, term->err_term,
1188                                 strdup("unknown term"),
1189                                 strdup("valid terms: call-graph,stack-size\n"));
1190                 }
1191                 return -EINVAL;
1192         }
1193
1194         return 0;
1195 }
1196
1197 static int config_attr(struct perf_event_attr *attr,
1198                        struct list_head *head,
1199                        struct parse_events_error *err,
1200                        config_term_func_t config_term)
1201 {
1202         struct parse_events_term *term;
1203
1204         list_for_each_entry(term, head, list)
1205                 if (config_term(attr, term, err))
1206                         return -EINVAL;
1207
1208         return 0;
1209 }
1210
1211 static int get_config_terms(struct list_head *head_config,
1212                             struct list_head *head_terms __maybe_unused)
1213 {
1214 #define ADD_CONFIG_TERM(__type, __weak)                         \
1215         struct evsel_config_term *__t;                  \
1216                                                                 \
1217         __t = zalloc(sizeof(*__t));                             \
1218         if (!__t)                                               \
1219                 return -ENOMEM;                                 \
1220                                                                 \
1221         INIT_LIST_HEAD(&__t->list);                             \
1222         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1223         __t->weak       = __weak;                               \
1224         list_add_tail(&__t->list, head_terms)
1225
1226 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1227 do {                                                            \
1228         ADD_CONFIG_TERM(__type, __weak);                        \
1229         __t->val.__name = __val;                                \
1230 } while (0)
1231
1232 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1233 do {                                                            \
1234         ADD_CONFIG_TERM(__type, __weak);                        \
1235         __t->val.str = strdup(__val);                           \
1236         if (!__t->val.str) {                                    \
1237                 zfree(&__t);                                    \
1238                 return -ENOMEM;                                 \
1239         }                                                       \
1240         __t->free_str = true;                                   \
1241 } while (0)
1242
1243         struct parse_events_term *term;
1244
1245         list_for_each_entry(term, head_config, list) {
1246                 switch (term->type_term) {
1247                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1248                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1249                         break;
1250                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1251                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1252                         break;
1253                 case PARSE_EVENTS__TERM_TYPE_TIME:
1254                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1255                         break;
1256                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1257                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1258                         break;
1259                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1260                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1261                         break;
1262                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1263                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1264                                             term->val.num, term->weak);
1265                         break;
1266                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1267                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1268                                             term->val.num ? 1 : 0, term->weak);
1269                         break;
1270                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1271                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1272                                             term->val.num ? 0 : 1, term->weak);
1273                         break;
1274                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1275                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1276                                             term->val.num, term->weak);
1277                         break;
1278                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1279                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1280                                             term->val.num, term->weak);
1281                         break;
1282                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1283                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1284                                             term->val.num ? 1 : 0, term->weak);
1285                         break;
1286                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1287                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1288                                             term->val.num ? 0 : 1, term->weak);
1289                         break;
1290                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1291                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1292                         break;
1293                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1294                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1295                                             term->val.num ? true : false, term->weak);
1296                         break;
1297                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1298                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1299                                             term->val.num ? 1 : 0, term->weak);
1300                         break;
1301                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1302                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1303                                             term->val.num, term->weak);
1304                         break;
1305                 default:
1306                         break;
1307                 }
1308         }
1309         return 0;
1310 }
1311
1312 /*
1313  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1314  * each bit of attr->config that the user has changed.
1315  */
1316 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1317                            struct list_head *head_terms)
1318 {
1319         struct parse_events_term *term;
1320         u64 bits = 0;
1321         int type;
1322
1323         list_for_each_entry(term, head_config, list) {
1324                 switch (term->type_term) {
1325                 case PARSE_EVENTS__TERM_TYPE_USER:
1326                         type = perf_pmu__format_type(&pmu->format, term->config);
1327                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1328                                 continue;
1329                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1330                         break;
1331                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1332                         bits = ~(u64)0;
1333                         break;
1334                 default:
1335                         break;
1336                 }
1337         }
1338
1339         if (bits)
1340                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1341
1342 #undef ADD_CONFIG_TERM
1343         return 0;
1344 }
1345
1346 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1347                                 const char *sys, const char *event,
1348                                 struct parse_events_error *err,
1349                                 struct list_head *head_config)
1350 {
1351         if (head_config) {
1352                 struct perf_event_attr attr;
1353
1354                 if (config_attr(&attr, head_config, err,
1355                                 config_term_tracepoint))
1356                         return -EINVAL;
1357         }
1358
1359         if (strpbrk(sys, "*?"))
1360                 return add_tracepoint_multi_sys(list, idx, sys, event,
1361                                                 err, head_config);
1362         else
1363                 return add_tracepoint_event(list, idx, sys, event,
1364                                             err, head_config);
1365 }
1366
1367 int parse_events_add_numeric(struct parse_events_state *parse_state,
1368                              struct list_head *list,
1369                              u32 type, u64 config,
1370                              struct list_head *head_config)
1371 {
1372         struct perf_event_attr attr;
1373         LIST_HEAD(config_terms);
1374
1375         memset(&attr, 0, sizeof(attr));
1376         attr.type = type;
1377         attr.config = config;
1378
1379         if (head_config) {
1380                 if (config_attr(&attr, head_config, parse_state->error,
1381                                 config_term_common))
1382                         return -EINVAL;
1383
1384                 if (get_config_terms(head_config, &config_terms))
1385                         return -ENOMEM;
1386         }
1387
1388         return add_event(list, &parse_state->idx, &attr,
1389                          get_config_name(head_config), &config_terms);
1390 }
1391
1392 int parse_events_add_tool(struct parse_events_state *parse_state,
1393                           struct list_head *list,
1394                           enum perf_tool_event tool_event)
1395 {
1396         return add_event_tool(list, &parse_state->idx, tool_event);
1397 }
1398
1399 static bool config_term_percore(struct list_head *config_terms)
1400 {
1401         struct evsel_config_term *term;
1402
1403         list_for_each_entry(term, config_terms, list) {
1404                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1405                         return term->val.percore;
1406         }
1407
1408         return false;
1409 }
1410
1411 int parse_events_add_pmu(struct parse_events_state *parse_state,
1412                          struct list_head *list, char *name,
1413                          struct list_head *head_config,
1414                          bool auto_merge_stats,
1415                          bool use_alias)
1416 {
1417         struct perf_event_attr attr;
1418         struct perf_pmu_info info;
1419         struct perf_pmu *pmu;
1420         struct evsel *evsel;
1421         struct parse_events_error *err = parse_state->error;
1422         bool use_uncore_alias;
1423         LIST_HEAD(config_terms);
1424
1425         pmu = perf_pmu__find(name);
1426         if (!pmu) {
1427                 char *err_str;
1428
1429                 if (asprintf(&err_str,
1430                                 "Cannot find PMU `%s'. Missing kernel support?",
1431                                 name) >= 0)
1432                         parse_events__handle_error(err, 0, err_str, NULL);
1433                 return -EINVAL;
1434         }
1435
1436         if (pmu->default_config) {
1437                 memcpy(&attr, pmu->default_config,
1438                        sizeof(struct perf_event_attr));
1439         } else {
1440                 memset(&attr, 0, sizeof(attr));
1441         }
1442
1443         use_uncore_alias = (pmu->is_uncore && use_alias);
1444
1445         if (!head_config) {
1446                 attr.type = pmu->type;
1447                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1448                                     auto_merge_stats, NULL);
1449                 if (evsel) {
1450                         evsel->pmu_name = name ? strdup(name) : NULL;
1451                         evsel->use_uncore_alias = use_uncore_alias;
1452                         return 0;
1453                 } else {
1454                         return -ENOMEM;
1455                 }
1456         }
1457
1458         if (perf_pmu__check_alias(pmu, head_config, &info))
1459                 return -EINVAL;
1460
1461         /*
1462          * Configure hardcoded terms first, no need to check
1463          * return value when called with fail == 0 ;)
1464          */
1465         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1466                 return -EINVAL;
1467
1468         if (get_config_terms(head_config, &config_terms))
1469                 return -ENOMEM;
1470
1471         /*
1472          * When using default config, record which bits of attr->config were
1473          * changed by the user.
1474          */
1475         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1476                 return -ENOMEM;
1477
1478         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1479                 struct evsel_config_term *pos, *tmp;
1480
1481                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1482                         list_del_init(&pos->list);
1483                         if (pos->free_str)
1484                                 zfree(&pos->val.str);
1485                         free(pos);
1486                 }
1487                 return -EINVAL;
1488         }
1489
1490         evsel = __add_event(list, &parse_state->idx, &attr,
1491                             get_config_name(head_config), pmu,
1492                             &config_terms, auto_merge_stats, NULL);
1493         if (evsel) {
1494                 evsel->unit = info.unit;
1495                 evsel->scale = info.scale;
1496                 evsel->per_pkg = info.per_pkg;
1497                 evsel->snapshot = info.snapshot;
1498                 evsel->metric_expr = info.metric_expr;
1499                 evsel->metric_name = info.metric_name;
1500                 evsel->pmu_name = name ? strdup(name) : NULL;
1501                 evsel->use_uncore_alias = use_uncore_alias;
1502                 evsel->percore = config_term_percore(&evsel->config_terms);
1503         }
1504
1505         return evsel ? 0 : -ENOMEM;
1506 }
1507
1508 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1509                                char *str, struct list_head **listp)
1510 {
1511         struct parse_events_term *term;
1512         struct list_head *list;
1513         struct perf_pmu *pmu = NULL;
1514         int ok = 0;
1515
1516         *listp = NULL;
1517         /* Add it for all PMUs that support the alias */
1518         list = malloc(sizeof(struct list_head));
1519         if (!list)
1520                 return -1;
1521         INIT_LIST_HEAD(list);
1522         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1523                 struct perf_pmu_alias *alias;
1524
1525                 list_for_each_entry(alias, &pmu->aliases, list) {
1526                         if (!strcasecmp(alias->name, str)) {
1527                                 struct list_head *head;
1528                                 char *config;
1529
1530                                 head = malloc(sizeof(struct list_head));
1531                                 if (!head)
1532                                         return -1;
1533                                 INIT_LIST_HEAD(head);
1534                                 config = strdup(str);
1535                                 if (!config)
1536                                         return -1;
1537                                 if (parse_events_term__num(&term,
1538                                                    PARSE_EVENTS__TERM_TYPE_USER,
1539                                                    config, 1, false, &config,
1540                                                    NULL) < 0) {
1541                                         free(list);
1542                                         free(config);
1543                                         return -1;
1544                                 }
1545                                 list_add_tail(&term->list, head);
1546
1547                                 if (!parse_events_add_pmu(parse_state, list,
1548                                                           pmu->name, head,
1549                                                           true, true)) {
1550                                         pr_debug("%s -> %s/%s/\n", str,
1551                                                  pmu->name, alias->str);
1552                                         ok++;
1553                                 }
1554
1555                                 parse_events_terms__delete(head);
1556                         }
1557                 }
1558         }
1559         if (!ok) {
1560                 free(list);
1561                 return -1;
1562         }
1563         *listp = list;
1564         return 0;
1565 }
1566
1567 int parse_events__modifier_group(struct list_head *list,
1568                                  char *event_mod)
1569 {
1570         return parse_events__modifier_event(list, event_mod, true);
1571 }
1572
1573 /*
1574  * Check if the two uncore PMUs are from the same uncore block
1575  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1576  */
1577 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1578 {
1579         char *end_a, *end_b;
1580
1581         end_a = strrchr(pmu_name_a, '_');
1582         end_b = strrchr(pmu_name_b, '_');
1583
1584         if (!end_a || !end_b)
1585                 return false;
1586
1587         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1588                 return false;
1589
1590         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1591 }
1592
1593 static int
1594 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1595                                            struct parse_events_state *parse_state)
1596 {
1597         struct evsel *evsel, *leader;
1598         uintptr_t *leaders;
1599         bool is_leader = true;
1600         int i, nr_pmu = 0, total_members, ret = 0;
1601
1602         leader = list_first_entry(list, struct evsel, core.node);
1603         evsel = list_last_entry(list, struct evsel, core.node);
1604         total_members = evsel->idx - leader->idx + 1;
1605
1606         leaders = calloc(total_members, sizeof(uintptr_t));
1607         if (WARN_ON(!leaders))
1608                 return 0;
1609
1610         /*
1611          * Going through the whole group and doing sanity check.
1612          * All members must use alias, and be from the same uncore block.
1613          * Also, storing the leader events in an array.
1614          */
1615         __evlist__for_each_entry(list, evsel) {
1616
1617                 /* Only split the uncore group which members use alias */
1618                 if (!evsel->use_uncore_alias)
1619                         goto out;
1620
1621                 /* The events must be from the same uncore block */
1622                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1623                         goto out;
1624
1625                 if (!is_leader)
1626                         continue;
1627                 /*
1628                  * If the event's PMU name starts to repeat, it must be a new
1629                  * event. That can be used to distinguish the leader from
1630                  * other members, even they have the same event name.
1631                  */
1632                 if ((leader != evsel) &&
1633                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1634                         is_leader = false;
1635                         continue;
1636                 }
1637
1638                 /* Store the leader event for each PMU */
1639                 leaders[nr_pmu++] = (uintptr_t) evsel;
1640         }
1641
1642         /* only one event alias */
1643         if (nr_pmu == total_members) {
1644                 parse_state->nr_groups--;
1645                 goto handled;
1646         }
1647
1648         /*
1649          * An uncore event alias is a joint name which means the same event
1650          * runs on all PMUs of a block.
1651          * Perf doesn't support mixed events from different PMUs in the same
1652          * group. The big group has to be split into multiple small groups
1653          * which only include the events from the same PMU.
1654          *
1655          * Here the uncore event aliases must be from the same uncore block.
1656          * The number of PMUs must be same for each alias. The number of new
1657          * small groups equals to the number of PMUs.
1658          * Setting the leader event for corresponding members in each group.
1659          */
1660         i = 0;
1661         __evlist__for_each_entry(list, evsel) {
1662                 if (i >= nr_pmu)
1663                         i = 0;
1664                 evsel->leader = (struct evsel *) leaders[i++];
1665         }
1666
1667         /* The number of members and group name are same for each group */
1668         for (i = 0; i < nr_pmu; i++) {
1669                 evsel = (struct evsel *) leaders[i];
1670                 evsel->core.nr_members = total_members / nr_pmu;
1671                 evsel->group_name = name ? strdup(name) : NULL;
1672         }
1673
1674         /* Take the new small groups into account */
1675         parse_state->nr_groups += nr_pmu - 1;
1676
1677 handled:
1678         ret = 1;
1679 out:
1680         free(leaders);
1681         return ret;
1682 }
1683
1684 void parse_events__set_leader(char *name, struct list_head *list,
1685                               struct parse_events_state *parse_state)
1686 {
1687         struct evsel *leader;
1688
1689         if (list_empty(list)) {
1690                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1691                 return;
1692         }
1693
1694         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1695                 return;
1696
1697         __perf_evlist__set_leader(list);
1698         leader = list_entry(list->next, struct evsel, core.node);
1699         leader->group_name = name ? strdup(name) : NULL;
1700 }
1701
1702 /* list_event is assumed to point to malloc'ed memory */
1703 void parse_events_update_lists(struct list_head *list_event,
1704                                struct list_head *list_all)
1705 {
1706         /*
1707          * Called for single event definition. Update the
1708          * 'all event' list, and reinit the 'single event'
1709          * list, for next event definition.
1710          */
1711         list_splice_tail(list_event, list_all);
1712         free(list_event);
1713 }
1714
1715 struct event_modifier {
1716         int eu;
1717         int ek;
1718         int eh;
1719         int eH;
1720         int eG;
1721         int eI;
1722         int precise;
1723         int precise_max;
1724         int exclude_GH;
1725         int sample_read;
1726         int pinned;
1727         int weak;
1728 };
1729
1730 static int get_event_modifier(struct event_modifier *mod, char *str,
1731                                struct evsel *evsel)
1732 {
1733         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1734         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1735         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1736         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1737         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1738         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1739         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1740         int precise_max = 0;
1741         int sample_read = 0;
1742         int pinned = evsel ? evsel->core.attr.pinned : 0;
1743
1744         int exclude = eu | ek | eh;
1745         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1746         int weak = 0;
1747
1748         memset(mod, 0, sizeof(*mod));
1749
1750         while (*str) {
1751                 if (*str == 'u') {
1752                         if (!exclude)
1753                                 exclude = eu = ek = eh = 1;
1754                         eu = 0;
1755                 } else if (*str == 'k') {
1756                         if (!exclude)
1757                                 exclude = eu = ek = eh = 1;
1758                         ek = 0;
1759                 } else if (*str == 'h') {
1760                         if (!exclude)
1761                                 exclude = eu = ek = eh = 1;
1762                         eh = 0;
1763                 } else if (*str == 'G') {
1764                         if (!exclude_GH)
1765                                 exclude_GH = eG = eH = 1;
1766                         eG = 0;
1767                 } else if (*str == 'H') {
1768                         if (!exclude_GH)
1769                                 exclude_GH = eG = eH = 1;
1770                         eH = 0;
1771                 } else if (*str == 'I') {
1772                         eI = 1;
1773                 } else if (*str == 'p') {
1774                         precise++;
1775                         /* use of precise requires exclude_guest */
1776                         if (!exclude_GH)
1777                                 eG = 1;
1778                 } else if (*str == 'P') {
1779                         precise_max = 1;
1780                 } else if (*str == 'S') {
1781                         sample_read = 1;
1782                 } else if (*str == 'D') {
1783                         pinned = 1;
1784                 } else if (*str == 'W') {
1785                         weak = 1;
1786                 } else
1787                         break;
1788
1789                 ++str;
1790         }
1791
1792         /*
1793          * precise ip:
1794          *
1795          *  0 - SAMPLE_IP can have arbitrary skid
1796          *  1 - SAMPLE_IP must have constant skid
1797          *  2 - SAMPLE_IP requested to have 0 skid
1798          *  3 - SAMPLE_IP must have 0 skid
1799          *
1800          *  See also PERF_RECORD_MISC_EXACT_IP
1801          */
1802         if (precise > 3)
1803                 return -EINVAL;
1804
1805         mod->eu = eu;
1806         mod->ek = ek;
1807         mod->eh = eh;
1808         mod->eH = eH;
1809         mod->eG = eG;
1810         mod->eI = eI;
1811         mod->precise = precise;
1812         mod->precise_max = precise_max;
1813         mod->exclude_GH = exclude_GH;
1814         mod->sample_read = sample_read;
1815         mod->pinned = pinned;
1816         mod->weak = weak;
1817
1818         return 0;
1819 }
1820
1821 /*
1822  * Basic modifier sanity check to validate it contains only one
1823  * instance of any modifier (apart from 'p') present.
1824  */
1825 static int check_modifier(char *str)
1826 {
1827         char *p = str;
1828
1829         /* The sizeof includes 0 byte as well. */
1830         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1831                 return -1;
1832
1833         while (*p) {
1834                 if (*p != 'p' && strchr(p + 1, *p))
1835                         return -1;
1836                 p++;
1837         }
1838
1839         return 0;
1840 }
1841
1842 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1843 {
1844         struct evsel *evsel;
1845         struct event_modifier mod;
1846
1847         if (str == NULL)
1848                 return 0;
1849
1850         if (check_modifier(str))
1851                 return -EINVAL;
1852
1853         if (!add && get_event_modifier(&mod, str, NULL))
1854                 return -EINVAL;
1855
1856         __evlist__for_each_entry(list, evsel) {
1857                 if (add && get_event_modifier(&mod, str, evsel))
1858                         return -EINVAL;
1859
1860                 evsel->core.attr.exclude_user   = mod.eu;
1861                 evsel->core.attr.exclude_kernel = mod.ek;
1862                 evsel->core.attr.exclude_hv     = mod.eh;
1863                 evsel->core.attr.precise_ip     = mod.precise;
1864                 evsel->core.attr.exclude_host   = mod.eH;
1865                 evsel->core.attr.exclude_guest  = mod.eG;
1866                 evsel->core.attr.exclude_idle   = mod.eI;
1867                 evsel->exclude_GH          = mod.exclude_GH;
1868                 evsel->sample_read         = mod.sample_read;
1869                 evsel->precise_max         = mod.precise_max;
1870                 evsel->weak_group          = mod.weak;
1871
1872                 if (evsel__is_group_leader(evsel))
1873                         evsel->core.attr.pinned = mod.pinned;
1874         }
1875
1876         return 0;
1877 }
1878
1879 int parse_events_name(struct list_head *list, char *name)
1880 {
1881         struct evsel *evsel;
1882
1883         __evlist__for_each_entry(list, evsel) {
1884                 if (!evsel->name)
1885                         evsel->name = strdup(name);
1886         }
1887
1888         return 0;
1889 }
1890
1891 static int
1892 comp_pmu(const void *p1, const void *p2)
1893 {
1894         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1895         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1896
1897         return strcasecmp(pmu1->symbol, pmu2->symbol);
1898 }
1899
1900 static void perf_pmu__parse_cleanup(void)
1901 {
1902         if (perf_pmu_events_list_num > 0) {
1903                 struct perf_pmu_event_symbol *p;
1904                 int i;
1905
1906                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1907                         p = perf_pmu_events_list + i;
1908                         zfree(&p->symbol);
1909                 }
1910                 zfree(&perf_pmu_events_list);
1911                 perf_pmu_events_list_num = 0;
1912         }
1913 }
1914
1915 #define SET_SYMBOL(str, stype)          \
1916 do {                                    \
1917         p->symbol = str;                \
1918         if (!p->symbol)                 \
1919                 goto err;               \
1920         p->type = stype;                \
1921 } while (0)
1922
1923 /*
1924  * Read the pmu events list from sysfs
1925  * Save it into perf_pmu_events_list
1926  */
1927 static void perf_pmu__parse_init(void)
1928 {
1929
1930         struct perf_pmu *pmu = NULL;
1931         struct perf_pmu_alias *alias;
1932         int len = 0;
1933
1934         pmu = NULL;
1935         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1936                 list_for_each_entry(alias, &pmu->aliases, list) {
1937                         if (strchr(alias->name, '-'))
1938                                 len++;
1939                         len++;
1940                 }
1941         }
1942
1943         if (len == 0) {
1944                 perf_pmu_events_list_num = -1;
1945                 return;
1946         }
1947         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1948         if (!perf_pmu_events_list)
1949                 return;
1950         perf_pmu_events_list_num = len;
1951
1952         len = 0;
1953         pmu = NULL;
1954         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1955                 list_for_each_entry(alias, &pmu->aliases, list) {
1956                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1957                         char *tmp = strchr(alias->name, '-');
1958
1959                         if (tmp != NULL) {
1960                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1961                                                 PMU_EVENT_SYMBOL_PREFIX);
1962                                 p++;
1963                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1964                                 len += 2;
1965                         } else {
1966                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1967                                 len++;
1968                         }
1969                 }
1970         }
1971         qsort(perf_pmu_events_list, len,
1972                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1973
1974         return;
1975 err:
1976         perf_pmu__parse_cleanup();
1977 }
1978
1979 enum perf_pmu_event_symbol_type
1980 perf_pmu__parse_check(const char *name)
1981 {
1982         struct perf_pmu_event_symbol p, *r;
1983
1984         /* scan kernel pmu events from sysfs if needed */
1985         if (perf_pmu_events_list_num == 0)
1986                 perf_pmu__parse_init();
1987         /*
1988          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1989          * cpu-cycles has been handled by hardcode.
1990          * So it must be cpu// events, not kernel pmu event.
1991          */
1992         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1993                 return PMU_EVENT_SYMBOL_ERR;
1994
1995         p.symbol = strdup(name);
1996         r = bsearch(&p, perf_pmu_events_list,
1997                         (size_t) perf_pmu_events_list_num,
1998                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1999         zfree(&p.symbol);
2000         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2001 }
2002
2003 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
2004 {
2005         YY_BUFFER_STATE buffer;
2006         void *scanner;
2007         int ret;
2008
2009         ret = parse_events_lex_init_extra(start_token, &scanner);
2010         if (ret)
2011                 return ret;
2012
2013         buffer = parse_events__scan_string(str, scanner);
2014
2015 #ifdef PARSER_DEBUG
2016         parse_events_debug = 1;
2017 #endif
2018         ret = parse_events_parse(parse_state, scanner);
2019
2020         parse_events__flush_buffer(buffer, scanner);
2021         parse_events__delete_buffer(buffer, scanner);
2022         parse_events_lex_destroy(scanner);
2023         return ret;
2024 }
2025
2026 /*
2027  * parse event config string, return a list of event terms.
2028  */
2029 int parse_events_terms(struct list_head *terms, const char *str)
2030 {
2031         struct parse_events_state parse_state = {
2032                 .terms = NULL,
2033         };
2034         int ret;
2035
2036         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
2037         if (!ret) {
2038                 list_splice(parse_state.terms, terms);
2039                 zfree(&parse_state.terms);
2040                 return 0;
2041         }
2042
2043         parse_events_terms__delete(parse_state.terms);
2044         return ret;
2045 }
2046
2047 int parse_events(struct evlist *evlist, const char *str,
2048                  struct parse_events_error *err)
2049 {
2050         struct parse_events_state parse_state = {
2051                 .list   = LIST_HEAD_INIT(parse_state.list),
2052                 .idx    = evlist->core.nr_entries,
2053                 .error  = err,
2054                 .evlist = evlist,
2055         };
2056         int ret;
2057
2058         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
2059         perf_pmu__parse_cleanup();
2060
2061         if (!ret && list_empty(&parse_state.list)) {
2062                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2063                 return -1;
2064         }
2065
2066         /*
2067          * Add list to the evlist even with errors to allow callers to clean up.
2068          */
2069         perf_evlist__splice_list_tail(evlist, &parse_state.list);
2070
2071         if (!ret) {
2072                 struct evsel *last;
2073
2074                 evlist->nr_groups += parse_state.nr_groups;
2075                 last = evlist__last(evlist);
2076                 last->cmdline_group_boundary = true;
2077
2078                 return 0;
2079         }
2080
2081         /*
2082          * There are 2 users - builtin-record and builtin-test objects.
2083          * Both call evlist__delete in case of error, so we dont
2084          * need to bother.
2085          */
2086         return ret;
2087 }
2088
2089 #define MAX_WIDTH 1000
2090 static int get_term_width(void)
2091 {
2092         struct winsize ws;
2093
2094         get_term_dimensions(&ws);
2095         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2096 }
2097
2098 static void __parse_events_print_error(int err_idx, const char *err_str,
2099                                 const char *err_help, const char *event)
2100 {
2101         const char *str = "invalid or unsupported event: ";
2102         char _buf[MAX_WIDTH];
2103         char *buf = (char *) event;
2104         int idx = 0;
2105         if (err_str) {
2106                 /* -2 for extra '' in the final fprintf */
2107                 int width       = get_term_width() - 2;
2108                 int len_event   = strlen(event);
2109                 int len_str, max_len, cut = 0;
2110
2111                 /*
2112                  * Maximum error index indent, we will cut
2113                  * the event string if it's bigger.
2114                  */
2115                 int max_err_idx = 13;
2116
2117                 /*
2118                  * Let's be specific with the message when
2119                  * we have the precise error.
2120                  */
2121                 str     = "event syntax error: ";
2122                 len_str = strlen(str);
2123                 max_len = width - len_str;
2124
2125                 buf = _buf;
2126
2127                 /* We're cutting from the beginning. */
2128                 if (err_idx > max_err_idx)
2129                         cut = err_idx - max_err_idx;
2130
2131                 strncpy(buf, event + cut, max_len);
2132
2133                 /* Mark cut parts with '..' on both sides. */
2134                 if (cut)
2135                         buf[0] = buf[1] = '.';
2136
2137                 if ((len_event - cut) > max_len) {
2138                         buf[max_len - 1] = buf[max_len - 2] = '.';
2139                         buf[max_len] = 0;
2140                 }
2141
2142                 idx = len_str + err_idx - cut;
2143         }
2144
2145         fprintf(stderr, "%s'%s'\n", str, buf);
2146         if (idx) {
2147                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2148                 if (err_help)
2149                         fprintf(stderr, "\n%s\n", err_help);
2150         }
2151 }
2152
2153 void parse_events_print_error(struct parse_events_error *err,
2154                               const char *event)
2155 {
2156         if (!err->num_errors)
2157                 return;
2158
2159         __parse_events_print_error(err->idx, err->str, err->help, event);
2160         zfree(&err->str);
2161         zfree(&err->help);
2162
2163         if (err->num_errors > 1) {
2164                 fputs("\nInitial error:\n", stderr);
2165                 __parse_events_print_error(err->first_idx, err->first_str,
2166                                         err->first_help, event);
2167                 zfree(&err->first_str);
2168                 zfree(&err->first_help);
2169         }
2170 }
2171
2172 #undef MAX_WIDTH
2173
2174 int parse_events_option(const struct option *opt, const char *str,
2175                         int unset __maybe_unused)
2176 {
2177         struct evlist *evlist = *(struct evlist **)opt->value;
2178         struct parse_events_error err;
2179         int ret;
2180
2181         bzero(&err, sizeof(err));
2182         ret = parse_events(evlist, str, &err);
2183
2184         if (ret) {
2185                 parse_events_print_error(&err, str);
2186                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2187         }
2188
2189         return ret;
2190 }
2191
2192 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2193 {
2194         struct evlist **evlistp = opt->value;
2195         int ret;
2196
2197         if (*evlistp == NULL) {
2198                 *evlistp = evlist__new();
2199
2200                 if (*evlistp == NULL) {
2201                         fprintf(stderr, "Not enough memory to create evlist\n");
2202                         return -1;
2203                 }
2204         }
2205
2206         ret = parse_events_option(opt, str, unset);
2207         if (ret) {
2208                 evlist__delete(*evlistp);
2209                 *evlistp = NULL;
2210         }
2211
2212         return ret;
2213 }
2214
2215 static int
2216 foreach_evsel_in_last_glob(struct evlist *evlist,
2217                            int (*func)(struct evsel *evsel,
2218                                        const void *arg),
2219                            const void *arg)
2220 {
2221         struct evsel *last = NULL;
2222         int err;
2223
2224         /*
2225          * Don't return when list_empty, give func a chance to report
2226          * error when it found last == NULL.
2227          *
2228          * So no need to WARN here, let *func do this.
2229          */
2230         if (evlist->core.nr_entries > 0)
2231                 last = evlist__last(evlist);
2232
2233         do {
2234                 err = (*func)(last, arg);
2235                 if (err)
2236                         return -1;
2237                 if (!last)
2238                         return 0;
2239
2240                 if (last->core.node.prev == &evlist->core.entries)
2241                         return 0;
2242                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2243         } while (!last->cmdline_group_boundary);
2244
2245         return 0;
2246 }
2247
2248 static int set_filter(struct evsel *evsel, const void *arg)
2249 {
2250         const char *str = arg;
2251         bool found = false;
2252         int nr_addr_filters = 0;
2253         struct perf_pmu *pmu = NULL;
2254
2255         if (evsel == NULL) {
2256                 fprintf(stderr,
2257                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2258                 return -1;
2259         }
2260
2261         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2262                 if (evsel__append_tp_filter(evsel, str) < 0) {
2263                         fprintf(stderr,
2264                                 "not enough memory to hold filter string\n");
2265                         return -1;
2266                 }
2267
2268                 return 0;
2269         }
2270
2271         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2272                 if (pmu->type == evsel->core.attr.type) {
2273                         found = true;
2274                         break;
2275                 }
2276
2277         if (found)
2278                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2279                                     "%d", &nr_addr_filters);
2280
2281         if (!nr_addr_filters) {
2282                 fprintf(stderr,
2283                         "This CPU does not support address filtering\n");
2284                 return -1;
2285         }
2286
2287         if (evsel__append_addr_filter(evsel, str) < 0) {
2288                 fprintf(stderr,
2289                         "not enough memory to hold filter string\n");
2290                 return -1;
2291         }
2292
2293         return 0;
2294 }
2295
2296 int parse_filter(const struct option *opt, const char *str,
2297                  int unset __maybe_unused)
2298 {
2299         struct evlist *evlist = *(struct evlist **)opt->value;
2300
2301         return foreach_evsel_in_last_glob(evlist, set_filter,
2302                                           (const void *)str);
2303 }
2304
2305 static int add_exclude_perf_filter(struct evsel *evsel,
2306                                    const void *arg __maybe_unused)
2307 {
2308         char new_filter[64];
2309
2310         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2311                 fprintf(stderr,
2312                         "--exclude-perf option should follow a -e tracepoint option\n");
2313                 return -1;
2314         }
2315
2316         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2317
2318         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2319                 fprintf(stderr,
2320                         "not enough memory to hold filter string\n");
2321                 return -1;
2322         }
2323
2324         return 0;
2325 }
2326
2327 int exclude_perf(const struct option *opt,
2328                  const char *arg __maybe_unused,
2329                  int unset __maybe_unused)
2330 {
2331         struct evlist *evlist = *(struct evlist **)opt->value;
2332
2333         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2334                                           NULL);
2335 }
2336
2337 static const char * const event_type_descriptors[] = {
2338         "Hardware event",
2339         "Software event",
2340         "Tracepoint event",
2341         "Hardware cache event",
2342         "Raw hardware event descriptor",
2343         "Hardware breakpoint",
2344 };
2345
2346 static int cmp_string(const void *a, const void *b)
2347 {
2348         const char * const *as = a;
2349         const char * const *bs = b;
2350
2351         return strcmp(*as, *bs);
2352 }
2353
2354 /*
2355  * Print the events from <debugfs_mount_point>/tracing/events
2356  */
2357
2358 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2359                              bool name_only)
2360 {
2361         DIR *sys_dir, *evt_dir;
2362         struct dirent *sys_dirent, *evt_dirent;
2363         char evt_path[MAXPATHLEN];
2364         char *dir_path;
2365         char **evt_list = NULL;
2366         unsigned int evt_i = 0, evt_num = 0;
2367         bool evt_num_known = false;
2368
2369 restart:
2370         sys_dir = tracing_events__opendir();
2371         if (!sys_dir)
2372                 return;
2373
2374         if (evt_num_known) {
2375                 evt_list = zalloc(sizeof(char *) * evt_num);
2376                 if (!evt_list)
2377                         goto out_close_sys_dir;
2378         }
2379
2380         for_each_subsystem(sys_dir, sys_dirent) {
2381                 if (subsys_glob != NULL &&
2382                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2383                         continue;
2384
2385                 dir_path = get_events_file(sys_dirent->d_name);
2386                 if (!dir_path)
2387                         continue;
2388                 evt_dir = opendir(dir_path);
2389                 if (!evt_dir)
2390                         goto next;
2391
2392                 for_each_event(dir_path, evt_dir, evt_dirent) {
2393                         if (event_glob != NULL &&
2394                             !strglobmatch(evt_dirent->d_name, event_glob))
2395                                 continue;
2396
2397                         if (!evt_num_known) {
2398                                 evt_num++;
2399                                 continue;
2400                         }
2401
2402                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2403                                  sys_dirent->d_name, evt_dirent->d_name);
2404
2405                         evt_list[evt_i] = strdup(evt_path);
2406                         if (evt_list[evt_i] == NULL) {
2407                                 put_events_file(dir_path);
2408                                 goto out_close_evt_dir;
2409                         }
2410                         evt_i++;
2411                 }
2412                 closedir(evt_dir);
2413 next:
2414                 put_events_file(dir_path);
2415         }
2416         closedir(sys_dir);
2417
2418         if (!evt_num_known) {
2419                 evt_num_known = true;
2420                 goto restart;
2421         }
2422         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2423         evt_i = 0;
2424         while (evt_i < evt_num) {
2425                 if (name_only) {
2426                         printf("%s ", evt_list[evt_i++]);
2427                         continue;
2428                 }
2429                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2430                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2431         }
2432         if (evt_num && pager_in_use())
2433                 printf("\n");
2434
2435 out_free:
2436         evt_num = evt_i;
2437         for (evt_i = 0; evt_i < evt_num; evt_i++)
2438                 zfree(&evt_list[evt_i]);
2439         zfree(&evt_list);
2440         return;
2441
2442 out_close_evt_dir:
2443         closedir(evt_dir);
2444 out_close_sys_dir:
2445         closedir(sys_dir);
2446
2447         printf("FATAL: not enough memory to print %s\n",
2448                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2449         if (evt_list)
2450                 goto out_free;
2451 }
2452
2453 /*
2454  * Check whether event is in <debugfs_mount_point>/tracing/events
2455  */
2456
2457 int is_valid_tracepoint(const char *event_string)
2458 {
2459         DIR *sys_dir, *evt_dir;
2460         struct dirent *sys_dirent, *evt_dirent;
2461         char evt_path[MAXPATHLEN];
2462         char *dir_path;
2463
2464         sys_dir = tracing_events__opendir();
2465         if (!sys_dir)
2466                 return 0;
2467
2468         for_each_subsystem(sys_dir, sys_dirent) {
2469                 dir_path = get_events_file(sys_dirent->d_name);
2470                 if (!dir_path)
2471                         continue;
2472                 evt_dir = opendir(dir_path);
2473                 if (!evt_dir)
2474                         goto next;
2475
2476                 for_each_event(dir_path, evt_dir, evt_dirent) {
2477                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2478                                  sys_dirent->d_name, evt_dirent->d_name);
2479                         if (!strcmp(evt_path, event_string)) {
2480                                 closedir(evt_dir);
2481                                 closedir(sys_dir);
2482                                 return 1;
2483                         }
2484                 }
2485                 closedir(evt_dir);
2486 next:
2487                 put_events_file(dir_path);
2488         }
2489         closedir(sys_dir);
2490         return 0;
2491 }
2492
2493 static bool is_event_supported(u8 type, unsigned config)
2494 {
2495         bool ret = true;
2496         int open_return;
2497         struct evsel *evsel;
2498         struct perf_event_attr attr = {
2499                 .type = type,
2500                 .config = config,
2501                 .disabled = 1,
2502         };
2503         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2504
2505         if (tmap == NULL)
2506                 return false;
2507
2508         evsel = evsel__new(&attr);
2509         if (evsel) {
2510                 open_return = evsel__open(evsel, NULL, tmap);
2511                 ret = open_return >= 0;
2512
2513                 if (open_return == -EACCES) {
2514                         /*
2515                          * This happens if the paranoid value
2516                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2517                          * Re-run with exclude_kernel set; we don't do that
2518                          * by default as some ARM machines do not support it.
2519                          *
2520                          */
2521                         evsel->core.attr.exclude_kernel = 1;
2522                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2523                 }
2524                 evsel__delete(evsel);
2525         }
2526
2527         perf_thread_map__put(tmap);
2528         return ret;
2529 }
2530
2531 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2532                       bool name_only)
2533 {
2534         struct probe_cache *pcache;
2535         struct probe_cache_entry *ent;
2536         struct strlist *bidlist, *sdtlist;
2537         struct strlist_config cfg = {.dont_dupstr = true};
2538         struct str_node *nd, *nd2;
2539         char *buf, *path, *ptr = NULL;
2540         bool show_detail = false;
2541         int ret;
2542
2543         sdtlist = strlist__new(NULL, &cfg);
2544         if (!sdtlist) {
2545                 pr_debug("Failed to allocate new strlist for SDT\n");
2546                 return;
2547         }
2548         bidlist = build_id_cache__list_all(true);
2549         if (!bidlist) {
2550                 pr_debug("Failed to get buildids: %d\n", errno);
2551                 return;
2552         }
2553         strlist__for_each_entry(nd, bidlist) {
2554                 pcache = probe_cache__new(nd->s, NULL);
2555                 if (!pcache)
2556                         continue;
2557                 list_for_each_entry(ent, &pcache->entries, node) {
2558                         if (!ent->sdt)
2559                                 continue;
2560                         if (subsys_glob &&
2561                             !strglobmatch(ent->pev.group, subsys_glob))
2562                                 continue;
2563                         if (event_glob &&
2564                             !strglobmatch(ent->pev.event, event_glob))
2565                                 continue;
2566                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2567                                         ent->pev.event, nd->s);
2568                         if (ret > 0)
2569                                 strlist__add(sdtlist, buf);
2570                 }
2571                 probe_cache__delete(pcache);
2572         }
2573         strlist__delete(bidlist);
2574
2575         strlist__for_each_entry(nd, sdtlist) {
2576                 buf = strchr(nd->s, '@');
2577                 if (buf)
2578                         *(buf++) = '\0';
2579                 if (name_only) {
2580                         printf("%s ", nd->s);
2581                         continue;
2582                 }
2583                 nd2 = strlist__next(nd);
2584                 if (nd2) {
2585                         ptr = strchr(nd2->s, '@');
2586                         if (ptr)
2587                                 *ptr = '\0';
2588                         if (strcmp(nd->s, nd2->s) == 0)
2589                                 show_detail = true;
2590                 }
2591                 if (show_detail) {
2592                         path = build_id_cache__origname(buf);
2593                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2594                         if (ret > 0) {
2595                                 printf("  %-50s [%s]\n", buf, "SDT event");
2596                                 free(buf);
2597                         }
2598                         free(path);
2599                 } else
2600                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2601                 if (nd2) {
2602                         if (strcmp(nd->s, nd2->s) != 0)
2603                                 show_detail = false;
2604                         if (ptr)
2605                                 *ptr = '@';
2606                 }
2607         }
2608         strlist__delete(sdtlist);
2609 }
2610
2611 int print_hwcache_events(const char *event_glob, bool name_only)
2612 {
2613         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2614         char name[64];
2615         char **evt_list = NULL;
2616         bool evt_num_known = false;
2617
2618 restart:
2619         if (evt_num_known) {
2620                 evt_list = zalloc(sizeof(char *) * evt_num);
2621                 if (!evt_list)
2622                         goto out_enomem;
2623         }
2624
2625         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2626                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2627                         /* skip invalid cache type */
2628                         if (!evsel__is_cache_op_valid(type, op))
2629                                 continue;
2630
2631                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2632                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2633                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2634                                         continue;
2635
2636                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2637                                                         type | (op << 8) | (i << 16)))
2638                                         continue;
2639
2640                                 if (!evt_num_known) {
2641                                         evt_num++;
2642                                         continue;
2643                                 }
2644
2645                                 evt_list[evt_i] = strdup(name);
2646                                 if (evt_list[evt_i] == NULL)
2647                                         goto out_enomem;
2648                                 evt_i++;
2649                         }
2650                 }
2651         }
2652
2653         if (!evt_num_known) {
2654                 evt_num_known = true;
2655                 goto restart;
2656         }
2657         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2658         evt_i = 0;
2659         while (evt_i < evt_num) {
2660                 if (name_only) {
2661                         printf("%s ", evt_list[evt_i++]);
2662                         continue;
2663                 }
2664                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2665                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2666         }
2667         if (evt_num && pager_in_use())
2668                 printf("\n");
2669
2670 out_free:
2671         evt_num = evt_i;
2672         for (evt_i = 0; evt_i < evt_num; evt_i++)
2673                 zfree(&evt_list[evt_i]);
2674         zfree(&evt_list);
2675         return evt_num;
2676
2677 out_enomem:
2678         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2679         if (evt_list)
2680                 goto out_free;
2681         return evt_num;
2682 }
2683
2684 static void print_tool_event(const char *name, const char *event_glob,
2685                              bool name_only)
2686 {
2687         if (event_glob && !strglobmatch(name, event_glob))
2688                 return;
2689         if (name_only)
2690                 printf("%s ", name);
2691         else
2692                 printf("  %-50s [%s]\n", name, "Tool event");
2693
2694 }
2695
2696 void print_tool_events(const char *event_glob, bool name_only)
2697 {
2698         print_tool_event("duration_time", event_glob, name_only);
2699         if (pager_in_use())
2700                 printf("\n");
2701 }
2702
2703 void print_symbol_events(const char *event_glob, unsigned type,
2704                                 struct event_symbol *syms, unsigned max,
2705                                 bool name_only)
2706 {
2707         unsigned int i, evt_i = 0, evt_num = 0;
2708         char name[MAX_NAME_LEN];
2709         char **evt_list = NULL;
2710         bool evt_num_known = false;
2711
2712 restart:
2713         if (evt_num_known) {
2714                 evt_list = zalloc(sizeof(char *) * evt_num);
2715                 if (!evt_list)
2716                         goto out_enomem;
2717                 syms -= max;
2718         }
2719
2720         for (i = 0; i < max; i++, syms++) {
2721
2722                 if (event_glob != NULL && syms->symbol != NULL &&
2723                     !(strglobmatch(syms->symbol, event_glob) ||
2724                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2725                         continue;
2726
2727                 if (!is_event_supported(type, i))
2728                         continue;
2729
2730                 if (!evt_num_known) {
2731                         evt_num++;
2732                         continue;
2733                 }
2734
2735                 if (!name_only && strlen(syms->alias))
2736                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2737                 else
2738                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2739
2740                 evt_list[evt_i] = strdup(name);
2741                 if (evt_list[evt_i] == NULL)
2742                         goto out_enomem;
2743                 evt_i++;
2744         }
2745
2746         if (!evt_num_known) {
2747                 evt_num_known = true;
2748                 goto restart;
2749         }
2750         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2751         evt_i = 0;
2752         while (evt_i < evt_num) {
2753                 if (name_only) {
2754                         printf("%s ", evt_list[evt_i++]);
2755                         continue;
2756                 }
2757                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2758         }
2759         if (evt_num && pager_in_use())
2760                 printf("\n");
2761
2762 out_free:
2763         evt_num = evt_i;
2764         for (evt_i = 0; evt_i < evt_num; evt_i++)
2765                 zfree(&evt_list[evt_i]);
2766         zfree(&evt_list);
2767         return;
2768
2769 out_enomem:
2770         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2771         if (evt_list)
2772                 goto out_free;
2773 }
2774
2775 /*
2776  * Print the help text for the event symbols:
2777  */
2778 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2779                         bool long_desc, bool details_flag, bool deprecated)
2780 {
2781         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2782                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2783
2784         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2785                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2786         print_tool_events(event_glob, name_only);
2787
2788         print_hwcache_events(event_glob, name_only);
2789
2790         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2791                         details_flag, deprecated);
2792
2793         if (event_glob != NULL)
2794                 return;
2795
2796         if (!name_only) {
2797                 printf("  %-50s [%s]\n",
2798                        "rNNN",
2799                        event_type_descriptors[PERF_TYPE_RAW]);
2800                 printf("  %-50s [%s]\n",
2801                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2802                        event_type_descriptors[PERF_TYPE_RAW]);
2803                 if (pager_in_use())
2804                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2805
2806                 printf("  %-50s [%s]\n",
2807                        "mem:<addr>[/len][:access]",
2808                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2809                 if (pager_in_use())
2810                         printf("\n");
2811         }
2812
2813         print_tracepoint_events(NULL, NULL, name_only);
2814
2815         print_sdt_events(NULL, NULL, name_only);
2816
2817         metricgroup__print(true, true, NULL, name_only, details_flag);
2818 }
2819
2820 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2821 {
2822         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2823 }
2824
2825 static int new_term(struct parse_events_term **_term,
2826                     struct parse_events_term *temp,
2827                     char *str, u64 num)
2828 {
2829         struct parse_events_term *term;
2830
2831         term = malloc(sizeof(*term));
2832         if (!term)
2833                 return -ENOMEM;
2834
2835         *term = *temp;
2836         INIT_LIST_HEAD(&term->list);
2837         term->weak = false;
2838
2839         switch (term->type_val) {
2840         case PARSE_EVENTS__TERM_TYPE_NUM:
2841                 term->val.num = num;
2842                 break;
2843         case PARSE_EVENTS__TERM_TYPE_STR:
2844                 term->val.str = str;
2845                 break;
2846         default:
2847                 free(term);
2848                 return -EINVAL;
2849         }
2850
2851         *_term = term;
2852         return 0;
2853 }
2854
2855 int parse_events_term__num(struct parse_events_term **term,
2856                            int type_term, char *config, u64 num,
2857                            bool no_value,
2858                            void *loc_term_, void *loc_val_)
2859 {
2860         YYLTYPE *loc_term = loc_term_;
2861         YYLTYPE *loc_val = loc_val_;
2862
2863         struct parse_events_term temp = {
2864                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2865                 .type_term = type_term,
2866                 .config    = config,
2867                 .no_value  = no_value,
2868                 .err_term  = loc_term ? loc_term->first_column : 0,
2869                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2870         };
2871
2872         return new_term(term, &temp, NULL, num);
2873 }
2874
2875 int parse_events_term__str(struct parse_events_term **term,
2876                            int type_term, char *config, char *str,
2877                            void *loc_term_, void *loc_val_)
2878 {
2879         YYLTYPE *loc_term = loc_term_;
2880         YYLTYPE *loc_val = loc_val_;
2881
2882         struct parse_events_term temp = {
2883                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2884                 .type_term = type_term,
2885                 .config    = config,
2886                 .err_term  = loc_term ? loc_term->first_column : 0,
2887                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2888         };
2889
2890         return new_term(term, &temp, str, 0);
2891 }
2892
2893 int parse_events_term__sym_hw(struct parse_events_term **term,
2894                               char *config, unsigned idx)
2895 {
2896         struct event_symbol *sym;
2897         char *str;
2898         struct parse_events_term temp = {
2899                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2900                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2901                 .config    = config,
2902         };
2903
2904         if (!temp.config) {
2905                 temp.config = strdup("event");
2906                 if (!temp.config)
2907                         return -ENOMEM;
2908         }
2909         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2910         sym = &event_symbols_hw[idx];
2911
2912         str = strdup(sym->symbol);
2913         if (!str)
2914                 return -ENOMEM;
2915         return new_term(term, &temp, str, 0);
2916 }
2917
2918 int parse_events_term__clone(struct parse_events_term **new,
2919                              struct parse_events_term *term)
2920 {
2921         char *str;
2922         struct parse_events_term temp = {
2923                 .type_val  = term->type_val,
2924                 .type_term = term->type_term,
2925                 .config    = NULL,
2926                 .err_term  = term->err_term,
2927                 .err_val   = term->err_val,
2928         };
2929
2930         if (term->config) {
2931                 temp.config = strdup(term->config);
2932                 if (!temp.config)
2933                         return -ENOMEM;
2934         }
2935         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
2936                 return new_term(new, &temp, NULL, term->val.num);
2937
2938         str = strdup(term->val.str);
2939         if (!str)
2940                 return -ENOMEM;
2941         return new_term(new, &temp, str, 0);
2942 }
2943
2944 void parse_events_term__delete(struct parse_events_term *term)
2945 {
2946         if (term->array.nr_ranges)
2947                 zfree(&term->array.ranges);
2948
2949         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
2950                 zfree(&term->val.str);
2951
2952         zfree(&term->config);
2953         free(term);
2954 }
2955
2956 int parse_events_copy_term_list(struct list_head *old,
2957                                  struct list_head **new)
2958 {
2959         struct parse_events_term *term, *n;
2960         int ret;
2961
2962         if (!old) {
2963                 *new = NULL;
2964                 return 0;
2965         }
2966
2967         *new = malloc(sizeof(struct list_head));
2968         if (!*new)
2969                 return -ENOMEM;
2970         INIT_LIST_HEAD(*new);
2971
2972         list_for_each_entry (term, old, list) {
2973                 ret = parse_events_term__clone(&n, term);
2974                 if (ret)
2975                         return ret;
2976                 list_add_tail(&n->list, *new);
2977         }
2978         return 0;
2979 }
2980
2981 void parse_events_terms__purge(struct list_head *terms)
2982 {
2983         struct parse_events_term *term, *h;
2984
2985         list_for_each_entry_safe(term, h, terms, list) {
2986                 list_del_init(&term->list);
2987                 parse_events_term__delete(term);
2988         }
2989 }
2990
2991 void parse_events_terms__delete(struct list_head *terms)
2992 {
2993         if (!terms)
2994                 return;
2995         parse_events_terms__purge(terms);
2996         free(terms);
2997 }
2998
2999 void parse_events__clear_array(struct parse_events_array *a)
3000 {
3001         zfree(&a->ranges);
3002 }
3003
3004 void parse_events_evlist_error(struct parse_events_state *parse_state,
3005                                int idx, const char *str)
3006 {
3007         if (!parse_state->error)
3008                 return;
3009
3010         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3011 }
3012
3013 static void config_terms_list(char *buf, size_t buf_sz)
3014 {
3015         int i;
3016         bool first = true;
3017
3018         buf[0] = '\0';
3019         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3020                 const char *name = config_term_names[i];
3021
3022                 if (!config_term_avail(i, NULL))
3023                         continue;
3024                 if (!name)
3025                         continue;
3026                 if (name[0] == '<')
3027                         continue;
3028
3029                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3030                         return;
3031
3032                 if (!first)
3033                         strcat(buf, ",");
3034                 else
3035                         first = false;
3036                 strcat(buf, name);
3037         }
3038 }
3039
3040 /*
3041  * Return string contains valid config terms of an event.
3042  * @additional_terms: For terms such as PMU sysfs terms.
3043  */
3044 char *parse_events_formats_error_string(char *additional_terms)
3045 {
3046         char *str;
3047         /* "no-overwrite" is the longest name */
3048         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3049                           (sizeof("no-overwrite") - 1)];
3050
3051         config_terms_list(static_terms, sizeof(static_terms));
3052         /* valid terms */
3053         if (additional_terms) {
3054                 if (asprintf(&str, "valid terms: %s,%s",
3055                              additional_terms, static_terms) < 0)
3056                         goto fail;
3057         } else {
3058                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3059                         goto fail;
3060         }
3061         return str;
3062
3063 fail:
3064         return NULL;
3065 }