tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <dirent.h>
   5 #include <errno.h>
   6 #include <sys/ioctl.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <fcntl.h>
  10 #include <sys/param.h>
  11 #include "term.h"
  12 #include "../perf.h"
  13 #include "evlist.h"
  14 #include "evsel.h"
  15 #include <subcmd/parse-options.h>
  16 #include "parse-events.h"
  17 #include <subcmd/exec-cmd.h>
  18 #include "string2.h"
  19 #include "strlist.h"
  20 #include "symbol.h"
  21 #include "cache.h"
  22 #include "header.h"
  23 #include "bpf-loader.h"
  24 #include "debug.h"
  25 #include <api/fs/tracing_path.h>
  26 #include "parse-events-bison.h"
  27 #define YY_EXTRA_TYPE int
  28 #include "parse-events-flex.h"
  29 #include "pmu.h"
  30 #include "thread_map.h"
  31 #include "cpumap.h"
  32 #include "probe-file.h"
  33 #include "asm/bug.h"
  34 #include "util/parse-branch-options.h"
  35 #include "metricgroup.h"
  36
  37 #define MAX_NAME_LEN 100
  38
  39 #ifdef PARSER_DEBUG
  40 extern int parse_events_debug;
  41 #endif
  42 int parse_events_parse(void *parse_state, void *scanner);
  43 static int get_config_terms(struct list_head *head_config,
  44                             struct list_head *head_terms __maybe_unused);
  45
  46 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  47 /*
  48  * The variable indicates the number of supported pmu event symbols.
  49  * 0 means not initialized and ready to init
  50  * -1 means failed to init, don't try anymore
  51  * >0 is the number of supported pmu event symbols
  52  */
  53 static int perf_pmu_events_list_num;
  54
  55 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  56         [PERF_COUNT_HW_CPU_CYCLES] = {
  57                 .symbol = "cpu-cycles",
  58                 .alias  = "cycles",
  59         },
  60         [PERF_COUNT_HW_INSTRUCTIONS] = {
  61                 .symbol = "instructions",
  62                 .alias  = "",
  63         },
  64         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  65                 .symbol = "cache-references",
  66                 .alias  = "",
  67         },
  68         [PERF_COUNT_HW_CACHE_MISSES] = {
  69                 .symbol = "cache-misses",
  70                 .alias  = "",
  71         },
  72         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  73                 .symbol = "branch-instructions",
  74                 .alias  = "branches",
  75         },
  76         [PERF_COUNT_HW_BRANCH_MISSES] = {
  77                 .symbol = "branch-misses",
  78                 .alias  = "",
  79         },
  80         [PERF_COUNT_HW_BUS_CYCLES] = {
  81                 .symbol = "bus-cycles",
  82                 .alias  = "",
  83         },
  84         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  85                 .symbol = "stalled-cycles-frontend",
  86                 .alias  = "idle-cycles-frontend",
  87         },
  88         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  89                 .symbol = "stalled-cycles-backend",
  90                 .alias  = "idle-cycles-backend",
  91         },
  92         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  93                 .symbol = "ref-cycles",
  94                 .alias  = "",
  95         },
  96 };
  97
  98 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  99         [PERF_COUNT_SW_CPU_CLOCK] = {
 100                 .symbol = "cpu-clock",
 101                 .alias  = "",
 102         },
 103         [PERF_COUNT_SW_TASK_CLOCK] = {
 104                 .symbol = "task-clock",
 105                 .alias  = "",
 106         },
 107         [PERF_COUNT_SW_PAGE_FAULTS] = {
 108                 .symbol = "page-faults",
 109                 .alias  = "faults",
 110         },
 111         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 112                 .symbol = "context-switches",
 113                 .alias  = "cs",
 114         },
 115         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 116                 .symbol = "cpu-migrations",
 117                 .alias  = "migrations",
 118         },
 119         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 120                 .symbol = "minor-faults",
 121                 .alias  = "",
 122         },
 123         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 124                 .symbol = "major-faults",
 125                 .alias  = "",
 126         },
 127         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 128                 .symbol = "alignment-faults",
 129                 .alias  = "",
 130         },
 131         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 132                 .symbol = "emulation-faults",
 133                 .alias  = "",
 134         },
 135         [PERF_COUNT_SW_DUMMY] = {
 136                 .symbol = "dummy",
 137                 .alias  = "",
 138         },
 139         [PERF_COUNT_SW_BPF_OUTPUT] = {
 140                 .symbol = "bpf-output",
 141                 .alias  = "",
 142         },
 143 };
 144
 145 #define __PERF_EVENT_FIELD(config, name) \
 146         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 147
 148 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 149 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 150 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 151 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 152
 153 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 154         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 155                 if (sys_dirent->d_type == DT_DIR &&             \
 156                     (strcmp(sys_dirent->d_name, ".")) &&        \
 157                     (strcmp(sys_dirent->d_name, "..")))
 158
 159 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 160 {
 161         char evt_path[MAXPATHLEN];
 162         int fd;
 163
 164         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 165         fd = open(evt_path, O_RDONLY);
 166         if (fd < 0)
 167                 return -EINVAL;
 168         close(fd);
 169
 170         return 0;
 171 }
 172
 173 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 174         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 175                 if (evt_dirent->d_type == DT_DIR &&             \
 176                     (strcmp(evt_dirent->d_name, ".")) &&        \
 177                     (strcmp(evt_dirent->d_name, "..")) &&       \
 178                     (!tp_event_has_id(dir_path, evt_dirent)))
 179
 180 #define MAX_EVENT_LENGTH 512
 181
 182
 183 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 184 {
 185         struct tracepoint_path *path = NULL;
 186         DIR *sys_dir, *evt_dir;
 187         struct dirent *sys_dirent, *evt_dirent;
 188         char id_buf[24];
 189         int fd;
 190         u64 id;
 191         char evt_path[MAXPATHLEN];
 192         char *dir_path;
 193
 194         sys_dir = tracing_events__opendir();
 195         if (!sys_dir)
 196                 return NULL;
 197
 198         for_each_subsystem(sys_dir, sys_dirent) {
 199                 dir_path = get_events_file(sys_dirent->d_name);
 200                 if (!dir_path)
 201                         continue;
 202                 evt_dir = opendir(dir_path);
 203                 if (!evt_dir)
 204                         goto next;
 205
 206                 for_each_event(dir_path, evt_dir, evt_dirent) {
 207
 208                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 209                                   evt_dirent->d_name);
 210                         fd = open(evt_path, O_RDONLY);
 211                         if (fd < 0)
 212                                 continue;
 213                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 214                                 close(fd);
 215                                 continue;
 216                         }
 217                         close(fd);
 218                         id = atoll(id_buf);
 219                         if (id == config) {
 220                                 put_events_file(dir_path);
 221                                 closedir(evt_dir);
 222                                 closedir(sys_dir);
 223                                 path = zalloc(sizeof(*path));
 224                                 if (!path)
 225                                         return NULL;
 226                                 path->system = malloc(MAX_EVENT_LENGTH);
 227                                 if (!path->system) {
 228                                         free(path);
 229                                         return NULL;
 230                                 }
 231                                 path->name = malloc(MAX_EVENT_LENGTH);
 232                                 if (!path->name) {
 233                                         zfree(&path->system);
 234                                         free(path);
 235                                         return NULL;
 236                                 }
 237                                 strncpy(path->system, sys_dirent->d_name,
 238                                         MAX_EVENT_LENGTH);
 239                                 strncpy(path->name, evt_dirent->d_name,
 240                                         MAX_EVENT_LENGTH);
 241                                 return path;
 242                         }
 243                 }
 244                 closedir(evt_dir);
 245 next:
 246                 put_events_file(dir_path);
 247         }
 248
 249         closedir(sys_dir);
 250         return NULL;
 251 }
 252
 253 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 254 {
 255         struct tracepoint_path *path = zalloc(sizeof(*path));
 256         char *str = strchr(name, ':');
 257
 258         if (path == NULL || str == NULL) {
 259                 free(path);
 260                 return NULL;
 261         }
 262
 263         path->system = strndup(name, str - name);
 264         path->name = strdup(str+1);
 265
 266         if (path->system == NULL || path->name == NULL) {
 267                 zfree(&path->system);
 268                 zfree(&path->name);
 269                 zfree(&path);
 270         }
 271
 272         return path;
 273 }
 274
 275 const char *event_type(int type)
 276 {
 277         switch (type) {
 278         case PERF_TYPE_HARDWARE:
 279                 return "hardware";
 280
 281         case PERF_TYPE_SOFTWARE:
 282                 return "software";
 283
 284         case PERF_TYPE_TRACEPOINT:
 285                 return "tracepoint";
 286
 287         case PERF_TYPE_HW_CACHE:
 288                 return "hardware-cache";
 289
 290         default:
 291                 break;
 292         }
 293
 294         return "unknown";
 295 }
 296
 297 static int parse_events__is_name_term(struct parse_events_term *term)
 298 {
 299         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 300 }
 301
 302 static char *get_config_name(struct list_head *head_terms)
 303 {
 304         struct parse_events_term *term;
 305
 306         if (!head_terms)
 307                 return NULL;
 308
 309         list_for_each_entry(term, head_terms, list)
 310                 if (parse_events__is_name_term(term))
 311                         return term->val.str;
 312
 313         return NULL;
 314 }
 315
 316 static struct perf_evsel *
 317 __add_event(struct list_head *list, int *idx,
 318             struct perf_event_attr *attr,
 319             char *name, struct perf_pmu *pmu,
 320             struct list_head *config_terms, bool auto_merge_stats)
 321 {
 322         struct perf_evsel *evsel;
 323         struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
 324
 325         event_attr_init(attr);
 326
 327         evsel = perf_evsel__new_idx(attr, *idx);
 328         if (!evsel)
 329                 return NULL;
 330
 331         (*idx)++;
 332         evsel->cpus        = cpu_map__get(cpus);
 333         evsel->own_cpus    = cpu_map__get(cpus);
 334         evsel->system_wide = pmu ? pmu->is_uncore : false;
 335         evsel->auto_merge_stats = auto_merge_stats;
 336
 337         if (name)
 338                 evsel->name = strdup(name);
 339
 340         if (config_terms)
 341                 list_splice(config_terms, &evsel->config_terms);
 342
 343         list_add_tail(&evsel->node, list);
 344         return evsel;
 345 }
 346
 347 static int add_event(struct list_head *list, int *idx,
 348                      struct perf_event_attr *attr, char *name,
 349                      struct list_head *config_terms)
 350 {
 351         return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
 352 }
 353
 354 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 355 {
 356         int i, j;
 357         int n, longest = -1;
 358
 359         for (i = 0; i < size; i++) {
 360                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 361                         n = strlen(names[i][j]);
 362                         if (n > longest && !strncasecmp(str, names[i][j], n))
 363                                 longest = n;
 364                 }
 365                 if (longest > 0)
 366                         return i;
 367         }
 368
 369         return -1;
 370 }
 371
 372 typedef int config_term_func_t(struct perf_event_attr *attr,
 373                                struct parse_events_term *term,
 374                                struct parse_events_error *err);
 375 static int config_term_common(struct perf_event_attr *attr,
 376                               struct parse_events_term *term,
 377                               struct parse_events_error *err);
 378 static int config_attr(struct perf_event_attr *attr,
 379                        struct list_head *head,
 380                        struct parse_events_error *err,
 381                        config_term_func_t config_term);
 382
 383 int parse_events_add_cache(struct list_head *list, int *idx,
 384                            char *type, char *op_result1, char *op_result2,
 385                            struct parse_events_error *err,
 386                            struct list_head *head_config)
 387 {
 388         struct perf_event_attr attr;
 389         LIST_HEAD(config_terms);
 390         char name[MAX_NAME_LEN], *config_name;
 391         int cache_type = -1, cache_op = -1, cache_result = -1;
 392         char *op_result[2] = { op_result1, op_result2 };
 393         int i, n;
 394
 395         /*
 396          * No fallback - if we cannot get a clear cache type
 397          * then bail out:
 398          */
 399         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 400                                    PERF_COUNT_HW_CACHE_MAX);
 401         if (cache_type == -1)
 402                 return -EINVAL;
 403
 404         config_name = get_config_name(head_config);
 405         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 406
 407         for (i = 0; (i < 2) && (op_result[i]); i++) {
 408                 char *str = op_result[i];
 409
 410                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 411
 412                 if (cache_op == -1) {
 413                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 414                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 415                         if (cache_op >= 0) {
 416                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 417                                         return -EINVAL;
 418                                 continue;
 419                         }
 420                 }
 421
 422                 if (cache_result == -1) {
 423                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 424                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 425                         if (cache_result >= 0)
 426                                 continue;
 427                 }
 428         }
 429
 430         /*
 431          * Fall back to reads:
 432          */
 433         if (cache_op == -1)
 434                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 435
 436         /*
 437          * Fall back to accesses:
 438          */
 439         if (cache_result == -1)
 440                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 441
 442         memset(&attr, 0, sizeof(attr));
 443         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 444         attr.type = PERF_TYPE_HW_CACHE;
 445
 446         if (head_config) {
 447                 if (config_attr(&attr, head_config, err,
 448                                 config_term_common))
 449                         return -EINVAL;
 450
 451                 if (get_config_terms(head_config, &config_terms))
 452                         return -ENOMEM;
 453         }
 454         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 455 }
 456
 457 static void tracepoint_error(struct parse_events_error *e, int err,
 458                              const char *sys, const char *name)
 459 {
 460         char help[BUFSIZ];
 461
 462         if (!e)
 463                 return;
 464
 465         /*
 466          * We get error directly from syscall errno ( > 0),
 467          * or from encoded pointer's error ( < 0).
 468          */
 469         err = abs(err);
 470
 471         switch (err) {
 472         case EACCES:
 473                 e->str = strdup("can't access trace events");
 474                 break;
 475         case ENOENT:
 476                 e->str = strdup("unknown tracepoint");
 477                 break;
 478         default:
 479                 e->str = strdup("failed to add tracepoint");
 480                 break;
 481         }
 482
 483         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 484         e->help = strdup(help);
 485 }
 486
 487 static int add_tracepoint(struct list_head *list, int *idx,
 488                           const char *sys_name, const char *evt_name,
 489                           struct parse_events_error *err,
 490                           struct list_head *head_config)
 491 {
 492         struct perf_evsel *evsel;
 493
 494         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 495         if (IS_ERR(evsel)) {
 496                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 497                 return PTR_ERR(evsel);
 498         }
 499
 500         if (head_config) {
 501                 LIST_HEAD(config_terms);
 502
 503                 if (get_config_terms(head_config, &config_terms))
 504                         return -ENOMEM;
 505                 list_splice(&config_terms, &evsel->config_terms);
 506         }
 507
 508         list_add_tail(&evsel->node, list);
 509         return 0;
 510 }
 511
 512 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 513                                       const char *sys_name, const char *evt_name,
 514                                       struct parse_events_error *err,
 515                                       struct list_head *head_config)
 516 {
 517         char *evt_path;
 518         struct dirent *evt_ent;
 519         DIR *evt_dir;
 520         int ret = 0, found = 0;
 521
 522         evt_path = get_events_file(sys_name);
 523         if (!evt_path) {
 524                 tracepoint_error(err, errno, sys_name, evt_name);
 525                 return -1;
 526         }
 527         evt_dir = opendir(evt_path);
 528         if (!evt_dir) {
 529                 put_events_file(evt_path);
 530                 tracepoint_error(err, errno, sys_name, evt_name);
 531                 return -1;
 532         }
 533
 534         while (!ret && (evt_ent = readdir(evt_dir))) {
 535                 if (!strcmp(evt_ent->d_name, ".")
 536                     || !strcmp(evt_ent->d_name, "..")
 537                     || !strcmp(evt_ent->d_name, "enable")
 538                     || !strcmp(evt_ent->d_name, "filter"))
 539                         continue;
 540
 541                 if (!strglobmatch(evt_ent->d_name, evt_name))
 542                         continue;
 543
 544                 found++;
 545
 546                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 547                                      err, head_config);
 548         }
 549
 550         if (!found) {
 551                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 552                 ret = -1;
 553         }
 554
 555         put_events_file(evt_path);
 556         closedir(evt_dir);
 557         return ret;
 558 }
 559
 560 static int add_tracepoint_event(struct list_head *list, int *idx,
 561                                 const char *sys_name, const char *evt_name,
 562                                 struct parse_events_error *err,
 563                                 struct list_head *head_config)
 564 {
 565         return strpbrk(evt_name, "*?") ?
 566                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 567                                           err, head_config) :
 568                add_tracepoint(list, idx, sys_name, evt_name,
 569                               err, head_config);
 570 }
 571
 572 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 573                                     const char *sys_name, const char *evt_name,
 574                                     struct parse_events_error *err,
 575                                     struct list_head *head_config)
 576 {
 577         struct dirent *events_ent;
 578         DIR *events_dir;
 579         int ret = 0;
 580
 581         events_dir = tracing_events__opendir();
 582         if (!events_dir) {
 583                 tracepoint_error(err, errno, sys_name, evt_name);
 584                 return -1;
 585         }
 586
 587         while (!ret && (events_ent = readdir(events_dir))) {
 588                 if (!strcmp(events_ent->d_name, ".")
 589                     || !strcmp(events_ent->d_name, "..")
 590                     || !strcmp(events_ent->d_name, "enable")
 591                     || !strcmp(events_ent->d_name, "header_event")
 592                     || !strcmp(events_ent->d_name, "header_page"))
 593                         continue;
 594
 595                 if (!strglobmatch(events_ent->d_name, sys_name))
 596                         continue;
 597
 598                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 599                                            evt_name, err, head_config);
 600         }
 601
 602         closedir(events_dir);
 603         return ret;
 604 }
 605
 606 struct __add_bpf_event_param {
 607         struct parse_events_state *parse_state;
 608         struct list_head *list;
 609         struct list_head *head_config;
 610 };
 611
 612 static int add_bpf_event(const char *group, const char *event, int fd,
 613                          void *_param)
 614 {
 615         LIST_HEAD(new_evsels);
 616         struct __add_bpf_event_param *param = _param;
 617         struct parse_events_state *parse_state = param->parse_state;
 618         struct list_head *list = param->list;
 619         struct perf_evsel *pos;
 620         int err;
 621
 622         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 623                  group, event, fd);
 624
 625         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 626                                           event, parse_state->error,
 627                                           param->head_config);
 628         if (err) {
 629                 struct perf_evsel *evsel, *tmp;
 630
 631                 pr_debug("Failed to add BPF event %s:%s\n",
 632                          group, event);
 633                 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
 634                         list_del(&evsel->node);
 635                         perf_evsel__delete(evsel);
 636                 }
 637                 return err;
 638         }
 639         pr_debug("adding %s:%s\n", group, event);
 640
 641         list_for_each_entry(pos, &new_evsels, node) {
 642                 pr_debug("adding %s:%s to %p\n",
 643                          group, event, pos);
 644                 pos->bpf_fd = fd;
 645         }
 646         list_splice(&new_evsels, list);
 647         return 0;
 648 }
 649
 650 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 651                               struct list_head *list,
 652                               struct bpf_object *obj,
 653                               struct list_head *head_config)
 654 {
 655         int err;
 656         char errbuf[BUFSIZ];
 657         struct __add_bpf_event_param param = {parse_state, list, head_config};
 658         static bool registered_unprobe_atexit = false;
 659
 660         if (IS_ERR(obj) || !obj) {
 661                 snprintf(errbuf, sizeof(errbuf),
 662                          "Internal error: load bpf obj with NULL");
 663                 err = -EINVAL;
 664                 goto errout;
 665         }
 666
 667         /*
 668          * Register atexit handler before calling bpf__probe() so
 669          * bpf__probe() don't need to unprobe probe points its already
 670          * created when failure.
 671          */
 672         if (!registered_unprobe_atexit) {
 673                 atexit(bpf__clear);
 674                 registered_unprobe_atexit = true;
 675         }
 676
 677         err = bpf__probe(obj);
 678         if (err) {
 679                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 680                 goto errout;
 681         }
 682
 683         err = bpf__load(obj);
 684         if (err) {
 685                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 686                 goto errout;
 687         }
 688
 689         err = bpf__foreach_event(obj, add_bpf_event, &param);
 690         if (err) {
 691                 snprintf(errbuf, sizeof(errbuf),
 692                          "Attach events in BPF object failed");
 693                 goto errout;
 694         }
 695
 696         return 0;
 697 errout:
 698         parse_state->error->help = strdup("(add -v to see detail)");
 699         parse_state->error->str = strdup(errbuf);
 700         return err;
 701 }
 702
 703 static int
 704 parse_events_config_bpf(struct parse_events_state *parse_state,
 705                         struct bpf_object *obj,
 706                         struct list_head *head_config)
 707 {
 708         struct parse_events_term *term;
 709         int error_pos;
 710
 711         if (!head_config || list_empty(head_config))
 712                 return 0;
 713
 714         list_for_each_entry(term, head_config, list) {
 715                 char errbuf[BUFSIZ];
 716                 int err;
 717
 718                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 719                         snprintf(errbuf, sizeof(errbuf),
 720                                  "Invalid config term for BPF object");
 721                         errbuf[BUFSIZ - 1] = '\0';
 722
 723                         parse_state->error->idx = term->err_term;
 724                         parse_state->error->str = strdup(errbuf);
 725                         return -EINVAL;
 726                 }
 727
 728                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 729                 if (err) {
 730                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 731                                                  &error_pos, err, errbuf,
 732                                                  sizeof(errbuf));
 733                         parse_state->error->help = strdup(
 734 "Hint:\tValid config terms:\n"
 735 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 736 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 737 "\n"
 738 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 739 "     \t(add -v to see detail)");
 740                         parse_state->error->str = strdup(errbuf);
 741                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 742                                 parse_state->error->idx = term->err_val;
 743                         else
 744                                 parse_state->error->idx = term->err_term + error_pos;
 745                         return err;
 746                 }
 747         }
 748         return 0;
 749 }
 750
 751 /*
 752  * Split config terms:
 753  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 754  *  'call-graph=fp' is 'evt config', should be applied to each
 755  *  events in bpf.c.
 756  * 'map:array.value[0]=1' is 'obj config', should be processed
 757  * with parse_events_config_bpf.
 758  *
 759  * Move object config terms from the first list to obj_head_config.
 760  */
 761 static void
 762 split_bpf_config_terms(struct list_head *evt_head_config,
 763                        struct list_head *obj_head_config)
 764 {
 765         struct parse_events_term *term, *temp;
 766
 767         /*
 768          * Currectly, all possible user config term
 769          * belong to bpf object. parse_events__is_hardcoded_term()
 770          * happends to be a good flag.
 771          *
 772          * See parse_events_config_bpf() and
 773          * config_term_tracepoint().
 774          */
 775         list_for_each_entry_safe(term, temp, evt_head_config, list)
 776                 if (!parse_events__is_hardcoded_term(term))
 777                         list_move_tail(&term->list, obj_head_config);
 778 }
 779
 780 int parse_events_load_bpf(struct parse_events_state *parse_state,
 781                           struct list_head *list,
 782                           char *bpf_file_name,
 783                           bool source,
 784                           struct list_head *head_config)
 785 {
 786         int err;
 787         struct bpf_object *obj;
 788         LIST_HEAD(obj_head_config);
 789
 790         if (head_config)
 791                 split_bpf_config_terms(head_config, &obj_head_config);
 792
 793         obj = bpf__prepare_load(bpf_file_name, source);
 794         if (IS_ERR(obj)) {
 795                 char errbuf[BUFSIZ];
 796
 797                 err = PTR_ERR(obj);
 798
 799                 if (err == -ENOTSUP)
 800                         snprintf(errbuf, sizeof(errbuf),
 801                                  "BPF support is not compiled");
 802                 else
 803                         bpf__strerror_prepare_load(bpf_file_name,
 804                                                    source,
 805                                                    -err, errbuf,
 806                                                    sizeof(errbuf));
 807
 808                 parse_state->error->help = strdup("(add -v to see detail)");
 809                 parse_state->error->str = strdup(errbuf);
 810                 return err;
 811         }
 812
 813         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 814         if (err)
 815                 return err;
 816         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 817
 818         /*
 819          * Caller doesn't know anything about obj_head_config,
 820          * so combine them together again before returnning.
 821          */
 822         if (head_config)
 823                 list_splice_tail(&obj_head_config, head_config);
 824         return err;
 825 }
 826
 827 static int
 828 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 829 {
 830         int i;
 831
 832         for (i = 0; i < 3; i++) {
 833                 if (!type || !type[i])
 834                         break;
 835
 836 #define CHECK_SET_TYPE(bit)             \
 837 do {                                    \
 838         if (attr->bp_type & bit)        \
 839                 return -EINVAL;         \
 840         else                            \
 841                 attr->bp_type |= bit;   \
 842 } while (0)
 843
 844                 switch (type[i]) {
 845                 case 'r':
 846                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 847                         break;
 848                 case 'w':
 849                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 850                         break;
 851                 case 'x':
 852                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 853                         break;
 854                 default:
 855                         return -EINVAL;
 856                 }
 857         }
 858
 859 #undef CHECK_SET_TYPE
 860
 861         if (!attr->bp_type) /* Default */
 862                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 863
 864         return 0;
 865 }
 866
 867 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 868                                 void *ptr, char *type, u64 len)
 869 {
 870         struct perf_event_attr attr;
 871
 872         memset(&attr, 0, sizeof(attr));
 873         attr.bp_addr = (unsigned long) ptr;
 874
 875         if (parse_breakpoint_type(type, &attr))
 876                 return -EINVAL;
 877
 878         /* Provide some defaults if len is not specified */
 879         if (!len) {
 880                 if (attr.bp_type == HW_BREAKPOINT_X)
 881                         len = sizeof(long);
 882                 else
 883                         len = HW_BREAKPOINT_LEN_4;
 884         }
 885
 886         attr.bp_len = len;
 887
 888         attr.type = PERF_TYPE_BREAKPOINT;
 889         attr.sample_period = 1;
 890
 891         return add_event(list, idx, &attr, NULL, NULL);
 892 }
 893
 894 static int check_type_val(struct parse_events_term *term,
 895                           struct parse_events_error *err,
 896                           int type)
 897 {
 898         if (type == term->type_val)
 899                 return 0;
 900
 901         if (err) {
 902                 err->idx = term->err_val;
 903                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 904                         err->str = strdup("expected numeric value");
 905                 else
 906                         err->str = strdup("expected string value");
 907         }
 908         return -EINVAL;
 909 }
 910
 911 /*
 912  * Update according to parse-events.l
 913  */
 914 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 915         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 916         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 917         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 918         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 919         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 920         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 921         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 922         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 923         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 924         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 925         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 926         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 927         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 928         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 929         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
 930         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 931         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 932         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 933 };
 934
 935 static bool config_term_shrinked;
 936
 937 static bool
 938 config_term_avail(int term_type, struct parse_events_error *err)
 939 {
 940         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 941                 err->str = strdup("Invalid term_type");
 942                 return false;
 943         }
 944         if (!config_term_shrinked)
 945                 return true;
 946
 947         switch (term_type) {
 948         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 949         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 950         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 951         case PARSE_EVENTS__TERM_TYPE_NAME:
 952         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 953                 return true;
 954         default:
 955                 if (!err)
 956                         return false;
 957
 958                 /* term_type is validated so indexing is safe */
 959                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 960                              config_term_names[term_type]) < 0)
 961                         err->str = NULL;
 962                 return false;
 963         }
 964 }
 965
 966 void parse_events__shrink_config_terms(void)
 967 {
 968         config_term_shrinked = true;
 969 }
 970
 971 static int config_term_common(struct perf_event_attr *attr,
 972                               struct parse_events_term *term,
 973                               struct parse_events_error *err)
 974 {
 975 #define CHECK_TYPE_VAL(type)                                               \
 976 do {                                                                       \
 977         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
 978                 return -EINVAL;                                            \
 979 } while (0)
 980
 981         switch (term->type_term) {
 982         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 983                 CHECK_TYPE_VAL(NUM);
 984                 attr->config = term->val.num;
 985                 break;
 986         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 987                 CHECK_TYPE_VAL(NUM);
 988                 attr->config1 = term->val.num;
 989                 break;
 990         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 991                 CHECK_TYPE_VAL(NUM);
 992                 attr->config2 = term->val.num;
 993                 break;
 994         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 995                 CHECK_TYPE_VAL(NUM);
 996                 break;
 997         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
 998                 CHECK_TYPE_VAL(NUM);
 999                 break;
1000         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1001                 CHECK_TYPE_VAL(STR);
1002                 if (strcmp(term->val.str, "no") &&
1003                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1004                         err->str = strdup("invalid branch sample type");
1005                         err->idx = term->err_val;
1006                         return -EINVAL;
1007                 }
1008                 break;
1009         case PARSE_EVENTS__TERM_TYPE_TIME:
1010                 CHECK_TYPE_VAL(NUM);
1011                 if (term->val.num > 1) {
1012                         err->str = strdup("expected 0 or 1");
1013                         err->idx = term->err_val;
1014                         return -EINVAL;
1015                 }
1016                 break;
1017         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1018                 CHECK_TYPE_VAL(STR);
1019                 break;
1020         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1021                 CHECK_TYPE_VAL(NUM);
1022                 break;
1023         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1024                 CHECK_TYPE_VAL(NUM);
1025                 break;
1026         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1027                 CHECK_TYPE_VAL(NUM);
1028                 break;
1029         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1030                 CHECK_TYPE_VAL(NUM);
1031                 break;
1032         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1033                 CHECK_TYPE_VAL(NUM);
1034                 break;
1035         case PARSE_EVENTS__TERM_TYPE_NAME:
1036                 CHECK_TYPE_VAL(STR);
1037                 break;
1038         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1039                 CHECK_TYPE_VAL(NUM);
1040                 break;
1041         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1042                 CHECK_TYPE_VAL(NUM);
1043                 break;
1044         default:
1045                 err->str = strdup("unknown term");
1046                 err->idx = term->err_term;
1047                 err->help = parse_events_formats_error_string(NULL);
1048                 return -EINVAL;
1049         }
1050
1051         /*
1052          * Check term availbility after basic checking so
1053          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1054          *
1055          * If check availbility at the entry of this function,
1056          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1057          * if an invalid config term is provided for legacy events
1058          * (for example, instructions/badterm/...), which is confusing.
1059          */
1060         if (!config_term_avail(term->type_term, err))
1061                 return -EINVAL;
1062         return 0;
1063 #undef CHECK_TYPE_VAL
1064 }
1065
1066 static int config_term_pmu(struct perf_event_attr *attr,
1067                            struct parse_events_term *term,
1068                            struct parse_events_error *err)
1069 {
1070         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1071             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1072                 /*
1073                  * Always succeed for sysfs terms, as we dont know
1074                  * at this point what type they need to have.
1075                  */
1076                 return 0;
1077         else
1078                 return config_term_common(attr, term, err);
1079 }
1080
1081 static int config_term_tracepoint(struct perf_event_attr *attr,
1082                                   struct parse_events_term *term,
1083                                   struct parse_events_error *err)
1084 {
1085         switch (term->type_term) {
1086         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1087         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1088         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1089         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1090         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1091         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1092         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1093         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1094                 return config_term_common(attr, term, err);
1095         default:
1096                 if (err) {
1097                         err->idx = term->err_term;
1098                         err->str = strdup("unknown term");
1099                         err->help = strdup("valid terms: call-graph,stack-size\n");
1100                 }
1101                 return -EINVAL;
1102         }
1103
1104         return 0;
1105 }
1106
1107 static int config_attr(struct perf_event_attr *attr,
1108                        struct list_head *head,
1109                        struct parse_events_error *err,
1110                        config_term_func_t config_term)
1111 {
1112         struct parse_events_term *term;
1113
1114         list_for_each_entry(term, head, list)
1115                 if (config_term(attr, term, err))
1116                         return -EINVAL;
1117
1118         return 0;
1119 }
1120
1121 static int get_config_terms(struct list_head *head_config,
1122                             struct list_head *head_terms __maybe_unused)
1123 {
1124 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1125 do {                                                            \
1126         struct perf_evsel_config_term *__t;                     \
1127                                                                 \
1128         __t = zalloc(sizeof(*__t));                             \
1129         if (!__t)                                               \
1130                 return -ENOMEM;                                 \
1131                                                                 \
1132         INIT_LIST_HEAD(&__t->list);                             \
1133         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1134         __t->val.__name = __val;                                \
1135         __t->weak       = term->weak;                           \
1136         list_add_tail(&__t->list, head_terms);                  \
1137 } while (0)
1138
1139         struct parse_events_term *term;
1140
1141         list_for_each_entry(term, head_config, list) {
1142                 switch (term->type_term) {
1143                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1144                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1145                         break;
1146                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1147                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1148                         break;
1149                 case PARSE_EVENTS__TERM_TYPE_TIME:
1150                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1151                         break;
1152                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1153                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1154                         break;
1155                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1156                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1157                         break;
1158                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1159                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1160                         break;
1161                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1162                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1163                         break;
1164                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1165                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1166                         break;
1167                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1168                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1169                         break;
1170                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1171                         ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1172                         break;
1173                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1174                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1175                         break;
1176                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1177                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1178                         break;
1179                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1180                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1181                         break;
1182                 default:
1183                         break;
1184                 }
1185         }
1186 #undef ADD_EVSEL_CONFIG
1187         return 0;
1188 }
1189
1190 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1191                                 const char *sys, const char *event,
1192                                 struct parse_events_error *err,
1193                                 struct list_head *head_config)
1194 {
1195         if (head_config) {
1196                 struct perf_event_attr attr;
1197
1198                 if (config_attr(&attr, head_config, err,
1199                                 config_term_tracepoint))
1200                         return -EINVAL;
1201         }
1202
1203         if (strpbrk(sys, "*?"))
1204                 return add_tracepoint_multi_sys(list, idx, sys, event,
1205                                                 err, head_config);
1206         else
1207                 return add_tracepoint_event(list, idx, sys, event,
1208                                             err, head_config);
1209 }
1210
1211 int parse_events_add_numeric(struct parse_events_state *parse_state,
1212                              struct list_head *list,
1213                              u32 type, u64 config,
1214                              struct list_head *head_config)
1215 {
1216         struct perf_event_attr attr;
1217         LIST_HEAD(config_terms);
1218
1219         memset(&attr, 0, sizeof(attr));
1220         attr.type = type;
1221         attr.config = config;
1222
1223         if (head_config) {
1224                 if (config_attr(&attr, head_config, parse_state->error,
1225                                 config_term_common))
1226                         return -EINVAL;
1227
1228                 if (get_config_terms(head_config, &config_terms))
1229                         return -ENOMEM;
1230         }
1231
1232         return add_event(list, &parse_state->idx, &attr,
1233                          get_config_name(head_config), &config_terms);
1234 }
1235
1236 int parse_events_add_pmu(struct parse_events_state *parse_state,
1237                          struct list_head *list, char *name,
1238                          struct list_head *head_config,
1239                          bool auto_merge_stats,
1240                          bool use_alias)
1241 {
1242         struct perf_event_attr attr;
1243         struct perf_pmu_info info;
1244         struct perf_pmu *pmu;
1245         struct perf_evsel *evsel;
1246         struct parse_events_error *err = parse_state->error;
1247         bool use_uncore_alias;
1248         LIST_HEAD(config_terms);
1249
1250         pmu = perf_pmu__find(name);
1251         if (!pmu) {
1252                 if (asprintf(&err->str,
1253                                 "Cannot find PMU `%s'. Missing kernel support?",
1254                                 name) < 0)
1255                         err->str = NULL;
1256                 return -EINVAL;
1257         }
1258
1259         if (pmu->default_config) {
1260                 memcpy(&attr, pmu->default_config,
1261                        sizeof(struct perf_event_attr));
1262         } else {
1263                 memset(&attr, 0, sizeof(attr));
1264         }
1265
1266         use_uncore_alias = (pmu->is_uncore && use_alias);
1267
1268         if (!head_config) {
1269                 attr.type = pmu->type;
1270                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1271                 if (evsel) {
1272                         evsel->pmu_name = name;
1273                         evsel->use_uncore_alias = use_uncore_alias;
1274                         return 0;
1275                 } else {
1276                         return -ENOMEM;
1277                 }
1278         }
1279
1280         if (perf_pmu__check_alias(pmu, head_config, &info))
1281                 return -EINVAL;
1282
1283         /*
1284          * Configure hardcoded terms first, no need to check
1285          * return value when called with fail == 0 ;)
1286          */
1287         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1288                 return -EINVAL;
1289
1290         if (get_config_terms(head_config, &config_terms))
1291                 return -ENOMEM;
1292
1293         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1294                 return -EINVAL;
1295
1296         evsel = __add_event(list, &parse_state->idx, &attr,
1297                             get_config_name(head_config), pmu,
1298                             &config_terms, auto_merge_stats);
1299         if (evsel) {
1300                 evsel->unit = info.unit;
1301                 evsel->scale = info.scale;
1302                 evsel->per_pkg = info.per_pkg;
1303                 evsel->snapshot = info.snapshot;
1304                 evsel->metric_expr = info.metric_expr;
1305                 evsel->metric_name = info.metric_name;
1306                 evsel->pmu_name = name;
1307                 evsel->use_uncore_alias = use_uncore_alias;
1308         }
1309
1310         return evsel ? 0 : -ENOMEM;
1311 }
1312
1313 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1314                                char *str, struct list_head **listp)
1315 {
1316         struct list_head *head;
1317         struct parse_events_term *term;
1318         struct list_head *list;
1319         struct perf_pmu *pmu = NULL;
1320         int ok = 0;
1321
1322         *listp = NULL;
1323         /* Add it for all PMUs that support the alias */
1324         list = malloc(sizeof(struct list_head));
1325         if (!list)
1326                 return -1;
1327         INIT_LIST_HEAD(list);
1328         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1329                 struct perf_pmu_alias *alias;
1330
1331                 list_for_each_entry(alias, &pmu->aliases, list) {
1332                         if (!strcasecmp(alias->name, str)) {
1333                                 head = malloc(sizeof(struct list_head));
1334                                 if (!head)
1335                                         return -1;
1336                                 INIT_LIST_HEAD(head);
1337                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1338                                                            str, 1, false, &str, NULL) < 0)
1339                                         return -1;
1340                                 list_add_tail(&term->list, head);
1341
1342                                 if (!parse_events_add_pmu(parse_state, list,
1343                                                           pmu->name, head,
1344                                                           true, true)) {
1345                                         pr_debug("%s -> %s/%s/\n", str,
1346                                                  pmu->name, alias->str);
1347                                         ok++;
1348                                 }
1349
1350                                 parse_events_terms__delete(head);
1351                         }
1352                 }
1353         }
1354         if (!ok)
1355                 return -1;
1356         *listp = list;
1357         return 0;
1358 }
1359
1360 int parse_events__modifier_group(struct list_head *list,
1361                                  char *event_mod)
1362 {
1363         return parse_events__modifier_event(list, event_mod, true);
1364 }
1365
1366 /*
1367  * Check if the two uncore PMUs are from the same uncore block
1368  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1369  */
1370 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1371 {
1372         char *end_a, *end_b;
1373
1374         end_a = strrchr(pmu_name_a, '_');
1375         end_b = strrchr(pmu_name_b, '_');
1376
1377         if (!end_a || !end_b)
1378                 return false;
1379
1380         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1381                 return false;
1382
1383         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1384 }
1385
1386 static int
1387 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1388                                            struct parse_events_state *parse_state)
1389 {
1390         struct perf_evsel *evsel, *leader;
1391         uintptr_t *leaders;
1392         bool is_leader = true;
1393         int i, nr_pmu = 0, total_members, ret = 0;
1394
1395         leader = list_first_entry(list, struct perf_evsel, node);
1396         evsel = list_last_entry(list, struct perf_evsel, node);
1397         total_members = evsel->idx - leader->idx + 1;
1398
1399         leaders = calloc(total_members, sizeof(uintptr_t));
1400         if (WARN_ON(!leaders))
1401                 return 0;
1402
1403         /*
1404          * Going through the whole group and doing sanity check.
1405          * All members must use alias, and be from the same uncore block.
1406          * Also, storing the leader events in an array.
1407          */
1408         __evlist__for_each_entry(list, evsel) {
1409
1410                 /* Only split the uncore group which members use alias */
1411                 if (!evsel->use_uncore_alias)
1412                         goto out;
1413
1414                 /* The events must be from the same uncore block */
1415                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1416                         goto out;
1417
1418                 if (!is_leader)
1419                         continue;
1420                 /*
1421                  * If the event's PMU name starts to repeat, it must be a new
1422                  * event. That can be used to distinguish the leader from
1423                  * other members, even they have the same event name.
1424                  */
1425                 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1426                         is_leader = false;
1427                         continue;
1428                 }
1429                 /* The name is always alias name */
1430                 WARN_ON(strcmp(leader->name, evsel->name));
1431
1432                 /* Store the leader event for each PMU */
1433                 leaders[nr_pmu++] = (uintptr_t) evsel;
1434         }
1435
1436         /* only one event alias */
1437         if (nr_pmu == total_members) {
1438                 parse_state->nr_groups--;
1439                 goto handled;
1440         }
1441
1442         /*
1443          * An uncore event alias is a joint name which means the same event
1444          * runs on all PMUs of a block.
1445          * Perf doesn't support mixed events from different PMUs in the same
1446          * group. The big group has to be split into multiple small groups
1447          * which only include the events from the same PMU.
1448          *
1449          * Here the uncore event aliases must be from the same uncore block.
1450          * The number of PMUs must be same for each alias. The number of new
1451          * small groups equals to the number of PMUs.
1452          * Setting the leader event for corresponding members in each group.
1453          */
1454         i = 0;
1455         __evlist__for_each_entry(list, evsel) {
1456                 if (i >= nr_pmu)
1457                         i = 0;
1458                 evsel->leader = (struct perf_evsel *) leaders[i++];
1459         }
1460
1461         /* The number of members and group name are same for each group */
1462         for (i = 0; i < nr_pmu; i++) {
1463                 evsel = (struct perf_evsel *) leaders[i];
1464                 evsel->nr_members = total_members / nr_pmu;
1465                 evsel->group_name = name ? strdup(name) : NULL;
1466         }
1467
1468         /* Take the new small groups into account */
1469         parse_state->nr_groups += nr_pmu - 1;
1470
1471 handled:
1472         ret = 1;
1473 out:
1474         free(leaders);
1475         return ret;
1476 }
1477
1478 void parse_events__set_leader(char *name, struct list_head *list,
1479                               struct parse_events_state *parse_state)
1480 {
1481         struct perf_evsel *leader;
1482
1483         if (list_empty(list)) {
1484                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1485                 return;
1486         }
1487
1488         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1489                 return;
1490
1491         __perf_evlist__set_leader(list);
1492         leader = list_entry(list->next, struct perf_evsel, node);
1493         leader->group_name = name ? strdup(name) : NULL;
1494 }
1495
1496 /* list_event is assumed to point to malloc'ed memory */
1497 void parse_events_update_lists(struct list_head *list_event,
1498                                struct list_head *list_all)
1499 {
1500         /*
1501          * Called for single event definition. Update the
1502          * 'all event' list, and reinit the 'single event'
1503          * list, for next event definition.
1504          */
1505         list_splice_tail(list_event, list_all);
1506         free(list_event);
1507 }
1508
1509 struct event_modifier {
1510         int eu;
1511         int ek;
1512         int eh;
1513         int eH;
1514         int eG;
1515         int eI;
1516         int precise;
1517         int precise_max;
1518         int exclude_GH;
1519         int sample_read;
1520         int pinned;
1521         int weak;
1522 };
1523
1524 static int get_event_modifier(struct event_modifier *mod, char *str,
1525                                struct perf_evsel *evsel)
1526 {
1527         int eu = evsel ? evsel->attr.exclude_user : 0;
1528         int ek = evsel ? evsel->attr.exclude_kernel : 0;
1529         int eh = evsel ? evsel->attr.exclude_hv : 0;
1530         int eH = evsel ? evsel->attr.exclude_host : 0;
1531         int eG = evsel ? evsel->attr.exclude_guest : 0;
1532         int eI = evsel ? evsel->attr.exclude_idle : 0;
1533         int precise = evsel ? evsel->attr.precise_ip : 0;
1534         int precise_max = 0;
1535         int sample_read = 0;
1536         int pinned = evsel ? evsel->attr.pinned : 0;
1537
1538         int exclude = eu | ek | eh;
1539         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1540         int weak = 0;
1541
1542         memset(mod, 0, sizeof(*mod));
1543
1544         while (*str) {
1545                 if (*str == 'u') {
1546                         if (!exclude)
1547                                 exclude = eu = ek = eh = 1;
1548                         eu = 0;
1549                 } else if (*str == 'k') {
1550                         if (!exclude)
1551                                 exclude = eu = ek = eh = 1;
1552                         ek = 0;
1553                 } else if (*str == 'h') {
1554                         if (!exclude)
1555                                 exclude = eu = ek = eh = 1;
1556                         eh = 0;
1557                 } else if (*str == 'G') {
1558                         if (!exclude_GH)
1559                                 exclude_GH = eG = eH = 1;
1560                         eG = 0;
1561                 } else if (*str == 'H') {
1562                         if (!exclude_GH)
1563                                 exclude_GH = eG = eH = 1;
1564                         eH = 0;
1565                 } else if (*str == 'I') {
1566                         eI = 1;
1567                 } else if (*str == 'p') {
1568                         precise++;
1569                         /* use of precise requires exclude_guest */
1570                         if (!exclude_GH)
1571                                 eG = 1;
1572                 } else if (*str == 'P') {
1573                         precise_max = 1;
1574                 } else if (*str == 'S') {
1575                         sample_read = 1;
1576                 } else if (*str == 'D') {
1577                         pinned = 1;
1578                 } else if (*str == 'W') {
1579                         weak = 1;
1580                 } else
1581                         break;
1582
1583                 ++str;
1584         }
1585
1586         /*
1587          * precise ip:
1588          *
1589          *  0 - SAMPLE_IP can have arbitrary skid
1590          *  1 - SAMPLE_IP must have constant skid
1591          *  2 - SAMPLE_IP requested to have 0 skid
1592          *  3 - SAMPLE_IP must have 0 skid
1593          *
1594          *  See also PERF_RECORD_MISC_EXACT_IP
1595          */
1596         if (precise > 3)
1597                 return -EINVAL;
1598
1599         mod->eu = eu;
1600         mod->ek = ek;
1601         mod->eh = eh;
1602         mod->eH = eH;
1603         mod->eG = eG;
1604         mod->eI = eI;
1605         mod->precise = precise;
1606         mod->precise_max = precise_max;
1607         mod->exclude_GH = exclude_GH;
1608         mod->sample_read = sample_read;
1609         mod->pinned = pinned;
1610         mod->weak = weak;
1611
1612         return 0;
1613 }
1614
1615 /*
1616  * Basic modifier sanity check to validate it contains only one
1617  * instance of any modifier (apart from 'p') present.
1618  */
1619 static int check_modifier(char *str)
1620 {
1621         char *p = str;
1622
1623         /* The sizeof includes 0 byte as well. */
1624         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1625                 return -1;
1626
1627         while (*p) {
1628                 if (*p != 'p' && strchr(p + 1, *p))
1629                         return -1;
1630                 p++;
1631         }
1632
1633         return 0;
1634 }
1635
1636 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1637 {
1638         struct perf_evsel *evsel;
1639         struct event_modifier mod;
1640
1641         if (str == NULL)
1642                 return 0;
1643
1644         if (check_modifier(str))
1645                 return -EINVAL;
1646
1647         if (!add && get_event_modifier(&mod, str, NULL))
1648                 return -EINVAL;
1649
1650         __evlist__for_each_entry(list, evsel) {
1651                 if (add && get_event_modifier(&mod, str, evsel))
1652                         return -EINVAL;
1653
1654                 evsel->attr.exclude_user   = mod.eu;
1655                 evsel->attr.exclude_kernel = mod.ek;
1656                 evsel->attr.exclude_hv     = mod.eh;
1657                 evsel->attr.precise_ip     = mod.precise;
1658                 evsel->attr.exclude_host   = mod.eH;
1659                 evsel->attr.exclude_guest  = mod.eG;
1660                 evsel->attr.exclude_idle   = mod.eI;
1661                 evsel->exclude_GH          = mod.exclude_GH;
1662                 evsel->sample_read         = mod.sample_read;
1663                 evsel->precise_max         = mod.precise_max;
1664                 evsel->weak_group          = mod.weak;
1665
1666                 if (perf_evsel__is_group_leader(evsel))
1667                         evsel->attr.pinned = mod.pinned;
1668         }
1669
1670         return 0;
1671 }
1672
1673 int parse_events_name(struct list_head *list, char *name)
1674 {
1675         struct perf_evsel *evsel;
1676
1677         __evlist__for_each_entry(list, evsel) {
1678                 if (!evsel->name)
1679                         evsel->name = strdup(name);
1680         }
1681
1682         return 0;
1683 }
1684
1685 static int
1686 comp_pmu(const void *p1, const void *p2)
1687 {
1688         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1689         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1690
1691         return strcasecmp(pmu1->symbol, pmu2->symbol);
1692 }
1693
1694 static void perf_pmu__parse_cleanup(void)
1695 {
1696         if (perf_pmu_events_list_num > 0) {
1697                 struct perf_pmu_event_symbol *p;
1698                 int i;
1699
1700                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1701                         p = perf_pmu_events_list + i;
1702                         zfree(&p->symbol);
1703                 }
1704                 zfree(&perf_pmu_events_list);
1705                 perf_pmu_events_list_num = 0;
1706         }
1707 }
1708
1709 #define SET_SYMBOL(str, stype)          \
1710 do {                                    \
1711         p->symbol = str;                \
1712         if (!p->symbol)                 \
1713                 goto err;               \
1714         p->type = stype;                \
1715 } while (0)
1716
1717 /*
1718  * Read the pmu events list from sysfs
1719  * Save it into perf_pmu_events_list
1720  */
1721 static void perf_pmu__parse_init(void)
1722 {
1723
1724         struct perf_pmu *pmu = NULL;
1725         struct perf_pmu_alias *alias;
1726         int len = 0;
1727
1728         pmu = NULL;
1729         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1730                 list_for_each_entry(alias, &pmu->aliases, list) {
1731                         if (strchr(alias->name, '-'))
1732                                 len++;
1733                         len++;
1734                 }
1735         }
1736
1737         if (len == 0) {
1738                 perf_pmu_events_list_num = -1;
1739                 return;
1740         }
1741         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1742         if (!perf_pmu_events_list)
1743                 return;
1744         perf_pmu_events_list_num = len;
1745
1746         len = 0;
1747         pmu = NULL;
1748         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1749                 list_for_each_entry(alias, &pmu->aliases, list) {
1750                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1751                         char *tmp = strchr(alias->name, '-');
1752
1753                         if (tmp != NULL) {
1754                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1755                                                 PMU_EVENT_SYMBOL_PREFIX);
1756                                 p++;
1757                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1758                                 len += 2;
1759                         } else {
1760                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1761                                 len++;
1762                         }
1763                 }
1764         }
1765         qsort(perf_pmu_events_list, len,
1766                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1767
1768         return;
1769 err:
1770         perf_pmu__parse_cleanup();
1771 }
1772
1773 enum perf_pmu_event_symbol_type
1774 perf_pmu__parse_check(const char *name)
1775 {
1776         struct perf_pmu_event_symbol p, *r;
1777
1778         /* scan kernel pmu events from sysfs if needed */
1779         if (perf_pmu_events_list_num == 0)
1780                 perf_pmu__parse_init();
1781         /*
1782          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1783          * cpu-cycles has been handled by hardcode.
1784          * So it must be cpu// events, not kernel pmu event.
1785          */
1786         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1787                 return PMU_EVENT_SYMBOL_ERR;
1788
1789         p.symbol = strdup(name);
1790         r = bsearch(&p, perf_pmu_events_list,
1791                         (size_t) perf_pmu_events_list_num,
1792                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1793         zfree(&p.symbol);
1794         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1795 }
1796
1797 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1798 {
1799         YY_BUFFER_STATE buffer;
1800         void *scanner;
1801         int ret;
1802
1803         ret = parse_events_lex_init_extra(start_token, &scanner);
1804         if (ret)
1805                 return ret;
1806
1807         buffer = parse_events__scan_string(str, scanner);
1808
1809 #ifdef PARSER_DEBUG
1810         parse_events_debug = 1;
1811 #endif
1812         ret = parse_events_parse(parse_state, scanner);
1813
1814         parse_events__flush_buffer(buffer, scanner);
1815         parse_events__delete_buffer(buffer, scanner);
1816         parse_events_lex_destroy(scanner);
1817         return ret;
1818 }
1819
1820 /*
1821  * parse event config string, return a list of event terms.
1822  */
1823 int parse_events_terms(struct list_head *terms, const char *str)
1824 {
1825         struct parse_events_state parse_state = {
1826                 .terms = NULL,
1827         };
1828         int ret;
1829
1830         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1831         if (!ret) {
1832                 list_splice(parse_state.terms, terms);
1833                 zfree(&parse_state.terms);
1834                 return 0;
1835         }
1836
1837         parse_events_terms__delete(parse_state.terms);
1838         return ret;
1839 }
1840
1841 int parse_events(struct perf_evlist *evlist, const char *str,
1842                  struct parse_events_error *err)
1843 {
1844         struct parse_events_state parse_state = {
1845                 .list   = LIST_HEAD_INIT(parse_state.list),
1846                 .idx    = evlist->nr_entries,
1847                 .error  = err,
1848                 .evlist = evlist,
1849         };
1850         int ret;
1851
1852         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1853         perf_pmu__parse_cleanup();
1854         if (!ret) {
1855                 struct perf_evsel *last;
1856
1857                 if (list_empty(&parse_state.list)) {
1858                         WARN_ONCE(true, "WARNING: event parser found nothing\n");
1859                         return -1;
1860                 }
1861
1862                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1863                 evlist->nr_groups += parse_state.nr_groups;
1864                 last = perf_evlist__last(evlist);
1865                 last->cmdline_group_boundary = true;
1866
1867                 return 0;
1868         }
1869
1870         /*
1871          * There are 2 users - builtin-record and builtin-test objects.
1872          * Both call perf_evlist__delete in case of error, so we dont
1873          * need to bother.
1874          */
1875         return ret;
1876 }
1877
1878 #define MAX_WIDTH 1000
1879 static int get_term_width(void)
1880 {
1881         struct winsize ws;
1882
1883         get_term_dimensions(&ws);
1884         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1885 }
1886
1887 void parse_events_print_error(struct parse_events_error *err,
1888                               const char *event)
1889 {
1890         const char *str = "invalid or unsupported event: ";
1891         char _buf[MAX_WIDTH];
1892         char *buf = (char *) event;
1893         int idx = 0;
1894
1895         if (err->str) {
1896                 /* -2 for extra '' in the final fprintf */
1897                 int width       = get_term_width() - 2;
1898                 int len_event   = strlen(event);
1899                 int len_str, max_len, cut = 0;
1900
1901                 /*
1902                  * Maximum error index indent, we will cut
1903                  * the event string if it's bigger.
1904                  */
1905                 int max_err_idx = 13;
1906
1907                 /*
1908                  * Let's be specific with the message when
1909                  * we have the precise error.
1910                  */
1911                 str     = "event syntax error: ";
1912                 len_str = strlen(str);
1913                 max_len = width - len_str;
1914
1915                 buf = _buf;
1916
1917                 /* We're cutting from the beginning. */
1918                 if (err->idx > max_err_idx)
1919                         cut = err->idx - max_err_idx;
1920
1921                 strncpy(buf, event + cut, max_len);
1922
1923                 /* Mark cut parts with '..' on both sides. */
1924                 if (cut)
1925                         buf[0] = buf[1] = '.';
1926
1927                 if ((len_event - cut) > max_len) {
1928                         buf[max_len - 1] = buf[max_len - 2] = '.';
1929                         buf[max_len] = 0;
1930                 }
1931
1932                 idx = len_str + err->idx - cut;
1933         }
1934
1935         fprintf(stderr, "%s'%s'\n", str, buf);
1936         if (idx) {
1937                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1938                 if (err->help)
1939                         fprintf(stderr, "\n%s\n", err->help);
1940                 zfree(&err->str);
1941                 zfree(&err->help);
1942         }
1943 }
1944
1945 #undef MAX_WIDTH
1946
1947 int parse_events_option(const struct option *opt, const char *str,
1948                         int unset __maybe_unused)
1949 {
1950         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1951         struct parse_events_error err = { .idx = 0, };
1952         int ret = parse_events(evlist, str, &err);
1953
1954         if (ret) {
1955                 parse_events_print_error(&err, str);
1956                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1957         }
1958
1959         return ret;
1960 }
1961
1962 static int
1963 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1964                            int (*func)(struct perf_evsel *evsel,
1965                                        const void *arg),
1966                            const void *arg)
1967 {
1968         struct perf_evsel *last = NULL;
1969         int err;
1970
1971         /*
1972          * Don't return when list_empty, give func a chance to report
1973          * error when it found last == NULL.
1974          *
1975          * So no need to WARN here, let *func do this.
1976          */
1977         if (evlist->nr_entries > 0)
1978                 last = perf_evlist__last(evlist);
1979
1980         do {
1981                 err = (*func)(last, arg);
1982                 if (err)
1983                         return -1;
1984                 if (!last)
1985                         return 0;
1986
1987                 if (last->node.prev == &evlist->entries)
1988                         return 0;
1989                 last = list_entry(last->node.prev, struct perf_evsel, node);
1990         } while (!last->cmdline_group_boundary);
1991
1992         return 0;
1993 }
1994
1995 static int set_filter(struct perf_evsel *evsel, const void *arg)
1996 {
1997         const char *str = arg;
1998         bool found = false;
1999         int nr_addr_filters = 0;
2000         struct perf_pmu *pmu = NULL;
2001
2002         if (evsel == NULL) {
2003                 fprintf(stderr,
2004                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2005                 return -1;
2006         }
2007
2008         if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
2009                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2010                         fprintf(stderr,
2011                                 "not enough memory to hold filter string\n");
2012                         return -1;
2013                 }
2014
2015                 return 0;
2016         }
2017
2018         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2019                 if (pmu->type == evsel->attr.type) {
2020                         found = true;
2021                         break;
2022                 }
2023
2024         if (found)
2025                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2026                                     "%d", &nr_addr_filters);
2027
2028         if (!nr_addr_filters) {
2029                 fprintf(stderr,
2030                         "This CPU does not support address filtering\n");
2031                 return -1;
2032         }
2033
2034         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2035                 fprintf(stderr,
2036                         "not enough memory to hold filter string\n");
2037                 return -1;
2038         }
2039
2040         return 0;
2041 }
2042
2043 int parse_filter(const struct option *opt, const char *str,
2044                  int unset __maybe_unused)
2045 {
2046         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2047
2048         return foreach_evsel_in_last_glob(evlist, set_filter,
2049                                           (const void *)str);
2050 }
2051
2052 static int add_exclude_perf_filter(struct perf_evsel *evsel,
2053                                    const void *arg __maybe_unused)
2054 {
2055         char new_filter[64];
2056
2057         if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
2058                 fprintf(stderr,
2059                         "--exclude-perf option should follow a -e tracepoint option\n");
2060                 return -1;
2061         }
2062
2063         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2064
2065         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2066                 fprintf(stderr,
2067                         "not enough memory to hold filter string\n");
2068                 return -1;
2069         }
2070
2071         return 0;
2072 }
2073
2074 int exclude_perf(const struct option *opt,
2075                  const char *arg __maybe_unused,
2076                  int unset __maybe_unused)
2077 {
2078         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2079
2080         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2081                                           NULL);
2082 }
2083
2084 static const char * const event_type_descriptors[] = {
2085         "Hardware event",
2086         "Software event",
2087         "Tracepoint event",
2088         "Hardware cache event",
2089         "Raw hardware event descriptor",
2090         "Hardware breakpoint",
2091 };
2092
2093 static int cmp_string(const void *a, const void *b)
2094 {
2095         const char * const *as = a;
2096         const char * const *bs = b;
2097
2098         return strcmp(*as, *bs);
2099 }
2100
2101 /*
2102  * Print the events from <debugfs_mount_point>/tracing/events
2103  */
2104
2105 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2106                              bool name_only)
2107 {
2108         DIR *sys_dir, *evt_dir;
2109         struct dirent *sys_dirent, *evt_dirent;
2110         char evt_path[MAXPATHLEN];
2111         char *dir_path;
2112         char **evt_list = NULL;
2113         unsigned int evt_i = 0, evt_num = 0;
2114         bool evt_num_known = false;
2115
2116 restart:
2117         sys_dir = tracing_events__opendir();
2118         if (!sys_dir)
2119                 return;
2120
2121         if (evt_num_known) {
2122                 evt_list = zalloc(sizeof(char *) * evt_num);
2123                 if (!evt_list)
2124                         goto out_close_sys_dir;
2125         }
2126
2127         for_each_subsystem(sys_dir, sys_dirent) {
2128                 if (subsys_glob != NULL &&
2129                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2130                         continue;
2131
2132                 dir_path = get_events_file(sys_dirent->d_name);
2133                 if (!dir_path)
2134                         continue;
2135                 evt_dir = opendir(dir_path);
2136                 if (!evt_dir)
2137                         goto next;
2138
2139                 for_each_event(dir_path, evt_dir, evt_dirent) {
2140                         if (event_glob != NULL &&
2141                             !strglobmatch(evt_dirent->d_name, event_glob))
2142                                 continue;
2143
2144                         if (!evt_num_known) {
2145                                 evt_num++;
2146                                 continue;
2147                         }
2148
2149                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2150                                  sys_dirent->d_name, evt_dirent->d_name);
2151
2152                         evt_list[evt_i] = strdup(evt_path);
2153                         if (evt_list[evt_i] == NULL) {
2154                                 put_events_file(dir_path);
2155                                 goto out_close_evt_dir;
2156                         }
2157                         evt_i++;
2158                 }
2159                 closedir(evt_dir);
2160 next:
2161                 put_events_file(dir_path);
2162         }
2163         closedir(sys_dir);
2164
2165         if (!evt_num_known) {
2166                 evt_num_known = true;
2167                 goto restart;
2168         }
2169         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2170         evt_i = 0;
2171         while (evt_i < evt_num) {
2172                 if (name_only) {
2173                         printf("%s ", evt_list[evt_i++]);
2174                         continue;
2175                 }
2176                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2177                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2178         }
2179         if (evt_num && pager_in_use())
2180                 printf("\n");
2181
2182 out_free:
2183         evt_num = evt_i;
2184         for (evt_i = 0; evt_i < evt_num; evt_i++)
2185                 zfree(&evt_list[evt_i]);
2186         zfree(&evt_list);
2187         return;
2188
2189 out_close_evt_dir:
2190         closedir(evt_dir);
2191 out_close_sys_dir:
2192         closedir(sys_dir);
2193
2194         printf("FATAL: not enough memory to print %s\n",
2195                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2196         if (evt_list)
2197                 goto out_free;
2198 }
2199
2200 /*
2201  * Check whether event is in <debugfs_mount_point>/tracing/events
2202  */
2203
2204 int is_valid_tracepoint(const char *event_string)
2205 {
2206         DIR *sys_dir, *evt_dir;
2207         struct dirent *sys_dirent, *evt_dirent;
2208         char evt_path[MAXPATHLEN];
2209         char *dir_path;
2210
2211         sys_dir = tracing_events__opendir();
2212         if (!sys_dir)
2213                 return 0;
2214
2215         for_each_subsystem(sys_dir, sys_dirent) {
2216                 dir_path = get_events_file(sys_dirent->d_name);
2217                 if (!dir_path)
2218                         continue;
2219                 evt_dir = opendir(dir_path);
2220                 if (!evt_dir)
2221                         goto next;
2222
2223                 for_each_event(dir_path, evt_dir, evt_dirent) {
2224                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2225                                  sys_dirent->d_name, evt_dirent->d_name);
2226                         if (!strcmp(evt_path, event_string)) {
2227                                 closedir(evt_dir);
2228                                 closedir(sys_dir);
2229                                 return 1;
2230                         }
2231                 }
2232                 closedir(evt_dir);
2233 next:
2234                 put_events_file(dir_path);
2235         }
2236         closedir(sys_dir);
2237         return 0;
2238 }
2239
2240 static bool is_event_supported(u8 type, unsigned config)
2241 {
2242         bool ret = true;
2243         int open_return;
2244         struct perf_evsel *evsel;
2245         struct perf_event_attr attr = {
2246                 .type = type,
2247                 .config = config,
2248                 .disabled = 1,
2249         };
2250         struct thread_map *tmap = thread_map__new_by_tid(0);
2251
2252         if (tmap == NULL)
2253                 return false;
2254
2255         evsel = perf_evsel__new(&attr);
2256         if (evsel) {
2257                 open_return = perf_evsel__open(evsel, NULL, tmap);
2258                 ret = open_return >= 0;
2259
2260                 if (open_return == -EACCES) {
2261                         /*
2262                          * This happens if the paranoid value
2263                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2264                          * Re-run with exclude_kernel set; we don't do that
2265                          * by default as some ARM machines do not support it.
2266                          *
2267                          */
2268                         evsel->attr.exclude_kernel = 1;
2269                         ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2270                 }
2271                 perf_evsel__delete(evsel);
2272         }
2273
2274         thread_map__put(tmap);
2275         return ret;
2276 }
2277
2278 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2279                       bool name_only)
2280 {
2281         struct probe_cache *pcache;
2282         struct probe_cache_entry *ent;
2283         struct strlist *bidlist, *sdtlist;
2284         struct strlist_config cfg = {.dont_dupstr = true};
2285         struct str_node *nd, *nd2;
2286         char *buf, *path, *ptr = NULL;
2287         bool show_detail = false;
2288         int ret;
2289
2290         sdtlist = strlist__new(NULL, &cfg);
2291         if (!sdtlist) {
2292                 pr_debug("Failed to allocate new strlist for SDT\n");
2293                 return;
2294         }
2295         bidlist = build_id_cache__list_all(true);
2296         if (!bidlist) {
2297                 pr_debug("Failed to get buildids: %d\n", errno);
2298                 return;
2299         }
2300         strlist__for_each_entry(nd, bidlist) {
2301                 pcache = probe_cache__new(nd->s, NULL);
2302                 if (!pcache)
2303                         continue;
2304                 list_for_each_entry(ent, &pcache->entries, node) {
2305                         if (!ent->sdt)
2306                                 continue;
2307                         if (subsys_glob &&
2308                             !strglobmatch(ent->pev.group, subsys_glob))
2309                                 continue;
2310                         if (event_glob &&
2311                             !strglobmatch(ent->pev.event, event_glob))
2312                                 continue;
2313                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2314                                         ent->pev.event, nd->s);
2315                         if (ret > 0)
2316                                 strlist__add(sdtlist, buf);
2317                 }
2318                 probe_cache__delete(pcache);
2319         }
2320         strlist__delete(bidlist);
2321
2322         strlist__for_each_entry(nd, sdtlist) {
2323                 buf = strchr(nd->s, '@');
2324                 if (buf)
2325                         *(buf++) = '\0';
2326                 if (name_only) {
2327                         printf("%s ", nd->s);
2328                         continue;
2329                 }
2330                 nd2 = strlist__next(nd);
2331                 if (nd2) {
2332                         ptr = strchr(nd2->s, '@');
2333                         if (ptr)
2334                                 *ptr = '\0';
2335                         if (strcmp(nd->s, nd2->s) == 0)
2336                                 show_detail = true;
2337                 }
2338                 if (show_detail) {
2339                         path = build_id_cache__origname(buf);
2340                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2341                         if (ret > 0) {
2342                                 printf("  %-50s [%s]\n", buf, "SDT event");
2343                                 free(buf);
2344                         }
2345                         free(path);
2346                 } else
2347                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2348                 if (nd2) {
2349                         if (strcmp(nd->s, nd2->s) != 0)
2350                                 show_detail = false;
2351                         if (ptr)
2352                                 *ptr = '@';
2353                 }
2354         }
2355         strlist__delete(sdtlist);
2356 }
2357
2358 int print_hwcache_events(const char *event_glob, bool name_only)
2359 {
2360         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2361         char name[64];
2362         char **evt_list = NULL;
2363         bool evt_num_known = false;
2364
2365 restart:
2366         if (evt_num_known) {
2367                 evt_list = zalloc(sizeof(char *) * evt_num);
2368                 if (!evt_list)
2369                         goto out_enomem;
2370         }
2371
2372         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2373                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2374                         /* skip invalid cache type */
2375                         if (!perf_evsel__is_cache_op_valid(type, op))
2376                                 continue;
2377
2378                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2379                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2380                                                                         name, sizeof(name));
2381                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2382                                         continue;
2383
2384                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2385                                                         type | (op << 8) | (i << 16)))
2386                                         continue;
2387
2388                                 if (!evt_num_known) {
2389                                         evt_num++;
2390                                         continue;
2391                                 }
2392
2393                                 evt_list[evt_i] = strdup(name);
2394                                 if (evt_list[evt_i] == NULL)
2395                                         goto out_enomem;
2396                                 evt_i++;
2397                         }
2398                 }
2399         }
2400
2401         if (!evt_num_known) {
2402                 evt_num_known = true;
2403                 goto restart;
2404         }
2405         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2406         evt_i = 0;
2407         while (evt_i < evt_num) {
2408                 if (name_only) {
2409                         printf("%s ", evt_list[evt_i++]);
2410                         continue;
2411                 }
2412                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2413                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2414         }
2415         if (evt_num && pager_in_use())
2416                 printf("\n");
2417
2418 out_free:
2419         evt_num = evt_i;
2420         for (evt_i = 0; evt_i < evt_num; evt_i++)
2421                 zfree(&evt_list[evt_i]);
2422         zfree(&evt_list);
2423         return evt_num;
2424
2425 out_enomem:
2426         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2427         if (evt_list)
2428                 goto out_free;
2429         return evt_num;
2430 }
2431
2432 void print_symbol_events(const char *event_glob, unsigned type,
2433                                 struct event_symbol *syms, unsigned max,
2434                                 bool name_only)
2435 {
2436         unsigned int i, evt_i = 0, evt_num = 0;
2437         char name[MAX_NAME_LEN];
2438         char **evt_list = NULL;
2439         bool evt_num_known = false;
2440
2441 restart:
2442         if (evt_num_known) {
2443                 evt_list = zalloc(sizeof(char *) * evt_num);
2444                 if (!evt_list)
2445                         goto out_enomem;
2446                 syms -= max;
2447         }
2448
2449         for (i = 0; i < max; i++, syms++) {
2450
2451                 if (event_glob != NULL && syms->symbol != NULL &&
2452                     !(strglobmatch(syms->symbol, event_glob) ||
2453                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2454                         continue;
2455
2456                 if (!is_event_supported(type, i))
2457                         continue;
2458
2459                 if (!evt_num_known) {
2460                         evt_num++;
2461                         continue;
2462                 }
2463
2464                 if (!name_only && strlen(syms->alias))
2465                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2466                 else
2467                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2468
2469                 evt_list[evt_i] = strdup(name);
2470                 if (evt_list[evt_i] == NULL)
2471                         goto out_enomem;
2472                 evt_i++;
2473         }
2474
2475         if (!evt_num_known) {
2476                 evt_num_known = true;
2477                 goto restart;
2478         }
2479         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2480         evt_i = 0;
2481         while (evt_i < evt_num) {
2482                 if (name_only) {
2483                         printf("%s ", evt_list[evt_i++]);
2484                         continue;
2485                 }
2486                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2487         }
2488         if (evt_num && pager_in_use())
2489                 printf("\n");
2490
2491 out_free:
2492         evt_num = evt_i;
2493         for (evt_i = 0; evt_i < evt_num; evt_i++)
2494                 zfree(&evt_list[evt_i]);
2495         zfree(&evt_list);
2496         return;
2497
2498 out_enomem:
2499         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2500         if (evt_list)
2501                 goto out_free;
2502 }
2503
2504 /*
2505  * Print the help text for the event symbols:
2506  */
2507 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2508                         bool long_desc, bool details_flag)
2509 {
2510         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2511                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2512
2513         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2514                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2515
2516         print_hwcache_events(event_glob, name_only);
2517
2518         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2519                         details_flag);
2520
2521         if (event_glob != NULL)
2522                 return;
2523
2524         if (!name_only) {
2525                 printf("  %-50s [%s]\n",
2526                        "rNNN",
2527                        event_type_descriptors[PERF_TYPE_RAW]);
2528                 printf("  %-50s [%s]\n",
2529                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2530                        event_type_descriptors[PERF_TYPE_RAW]);
2531                 if (pager_in_use())
2532                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2533
2534                 printf("  %-50s [%s]\n",
2535                        "mem:<addr>[/len][:access]",
2536                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2537                 if (pager_in_use())
2538                         printf("\n");
2539         }
2540
2541         print_tracepoint_events(NULL, NULL, name_only);
2542
2543         print_sdt_events(NULL, NULL, name_only);
2544
2545         metricgroup__print(true, true, NULL, name_only, details_flag);
2546 }
2547
2548 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2549 {
2550         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2551 }
2552
2553 static int new_term(struct parse_events_term **_term,
2554                     struct parse_events_term *temp,
2555                     char *str, u64 num)
2556 {
2557         struct parse_events_term *term;
2558
2559         term = malloc(sizeof(*term));
2560         if (!term)
2561                 return -ENOMEM;
2562
2563         *term = *temp;
2564         INIT_LIST_HEAD(&term->list);
2565         term->weak = false;
2566
2567         switch (term->type_val) {
2568         case PARSE_EVENTS__TERM_TYPE_NUM:
2569                 term->val.num = num;
2570                 break;
2571         case PARSE_EVENTS__TERM_TYPE_STR:
2572                 term->val.str = str;
2573                 break;
2574         default:
2575                 free(term);
2576                 return -EINVAL;
2577         }
2578
2579         *_term = term;
2580         return 0;
2581 }
2582
2583 int parse_events_term__num(struct parse_events_term **term,
2584                            int type_term, char *config, u64 num,
2585                            bool no_value,
2586                            void *loc_term_, void *loc_val_)
2587 {
2588         YYLTYPE *loc_term = loc_term_;
2589         YYLTYPE *loc_val = loc_val_;
2590
2591         struct parse_events_term temp = {
2592                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2593                 .type_term = type_term,
2594                 .config    = config,
2595                 .no_value  = no_value,
2596                 .err_term  = loc_term ? loc_term->first_column : 0,
2597                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2598         };
2599
2600         return new_term(term, &temp, NULL, num);
2601 }
2602
2603 int parse_events_term__str(struct parse_events_term **term,
2604                            int type_term, char *config, char *str,
2605                            void *loc_term_, void *loc_val_)
2606 {
2607         YYLTYPE *loc_term = loc_term_;
2608         YYLTYPE *loc_val = loc_val_;
2609
2610         struct parse_events_term temp = {
2611                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2612                 .type_term = type_term,
2613                 .config    = config,
2614                 .err_term  = loc_term ? loc_term->first_column : 0,
2615                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2616         };
2617
2618         return new_term(term, &temp, str, 0);
2619 }
2620
2621 int parse_events_term__sym_hw(struct parse_events_term **term,
2622                               char *config, unsigned idx)
2623 {
2624         struct event_symbol *sym;
2625         struct parse_events_term temp = {
2626                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2627                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2628                 .config    = config ?: (char *) "event",
2629         };
2630
2631         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2632         sym = &event_symbols_hw[idx];
2633
2634         return new_term(term, &temp, (char *) sym->symbol, 0);
2635 }
2636
2637 int parse_events_term__clone(struct parse_events_term **new,
2638                              struct parse_events_term *term)
2639 {
2640         struct parse_events_term temp = {
2641                 .type_val  = term->type_val,
2642                 .type_term = term->type_term,
2643                 .config    = term->config,
2644                 .err_term  = term->err_term,
2645                 .err_val   = term->err_val,
2646         };
2647
2648         return new_term(new, &temp, term->val.str, term->val.num);
2649 }
2650
2651 int parse_events_copy_term_list(struct list_head *old,
2652                                  struct list_head **new)
2653 {
2654         struct parse_events_term *term, *n;
2655         int ret;
2656
2657         if (!old) {
2658                 *new = NULL;
2659                 return 0;
2660         }
2661
2662         *new = malloc(sizeof(struct list_head));
2663         if (!*new)
2664                 return -ENOMEM;
2665         INIT_LIST_HEAD(*new);
2666
2667         list_for_each_entry (term, old, list) {
2668                 ret = parse_events_term__clone(&n, term);
2669                 if (ret)
2670                         return ret;
2671                 list_add_tail(&n->list, *new);
2672         }
2673         return 0;
2674 }
2675
2676 void parse_events_terms__purge(struct list_head *terms)
2677 {
2678         struct parse_events_term *term, *h;
2679
2680         list_for_each_entry_safe(term, h, terms, list) {
2681                 if (term->array.nr_ranges)
2682                         zfree(&term->array.ranges);
2683                 list_del_init(&term->list);
2684                 free(term);
2685         }
2686 }
2687
2688 void parse_events_terms__delete(struct list_head *terms)
2689 {
2690         if (!terms)
2691                 return;
2692         parse_events_terms__purge(terms);
2693         free(terms);
2694 }
2695
2696 void parse_events__clear_array(struct parse_events_array *a)
2697 {
2698         zfree(&a->ranges);
2699 }
2700
2701 void parse_events_evlist_error(struct parse_events_state *parse_state,
2702                                int idx, const char *str)
2703 {
2704         struct parse_events_error *err = parse_state->error;
2705
2706         if (!err)
2707                 return;
2708         err->idx = idx;
2709         err->str = strdup(str);
2710         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2711 }
2712
2713 static void config_terms_list(char *buf, size_t buf_sz)
2714 {
2715         int i;
2716         bool first = true;
2717
2718         buf[0] = '\0';
2719         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2720                 const char *name = config_term_names[i];
2721
2722                 if (!config_term_avail(i, NULL))
2723                         continue;
2724                 if (!name)
2725                         continue;
2726                 if (name[0] == '<')
2727                         continue;
2728
2729                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2730                         return;
2731
2732                 if (!first)
2733                         strcat(buf, ",");
2734                 else
2735                         first = false;
2736                 strcat(buf, name);
2737         }
2738 }
2739
2740 /*
2741  * Return string contains valid config terms of an event.
2742  * @additional_terms: For terms such as PMU sysfs terms.
2743  */
2744 char *parse_events_formats_error_string(char *additional_terms)
2745 {
2746         char *str;
2747         /* "no-overwrite" is the longest name */
2748         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2749                           (sizeof("no-overwrite") - 1)];
2750
2751         config_terms_list(static_terms, sizeof(static_terms));
2752         /* valid terms */
2753         if (additional_terms) {
2754                 if (asprintf(&str, "valid terms: %s,%s",
2755                              additional_terms, static_terms) < 0)
2756                         goto fail;
2757         } else {
2758                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2759                         goto fail;
2760         }
2761         return str;
2762
2763 fail:
2764         return NULL;
2765 }