tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE int
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "cpumap.h"
  34 #include "probe-file.h"
  35 #include "asm/bug.h"
  36 #include "util/parse-branch-options.h"
  37 #include "metricgroup.h"
  38
  39 #define MAX_NAME_LEN 100
  40
  41 #ifdef PARSER_DEBUG
  42 extern int parse_events_debug;
  43 #endif
  44 int parse_events_parse(void *parse_state, void *scanner);
  45 static int get_config_terms(struct list_head *head_config,
  46                             struct list_head *head_terms __maybe_unused);
  47
  48 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  49 /*
  50  * The variable indicates the number of supported pmu event symbols.
  51  * 0 means not initialized and ready to init
  52  * -1 means failed to init, don't try anymore
  53  * >0 is the number of supported pmu event symbols
  54  */
  55 static int perf_pmu_events_list_num;
  56
  57 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  58         [PERF_COUNT_HW_CPU_CYCLES] = {
  59                 .symbol = "cpu-cycles",
  60                 .alias  = "cycles",
  61         },
  62         [PERF_COUNT_HW_INSTRUCTIONS] = {
  63                 .symbol = "instructions",
  64                 .alias  = "",
  65         },
  66         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  67                 .symbol = "cache-references",
  68                 .alias  = "",
  69         },
  70         [PERF_COUNT_HW_CACHE_MISSES] = {
  71                 .symbol = "cache-misses",
  72                 .alias  = "",
  73         },
  74         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  75                 .symbol = "branch-instructions",
  76                 .alias  = "branches",
  77         },
  78         [PERF_COUNT_HW_BRANCH_MISSES] = {
  79                 .symbol = "branch-misses",
  80                 .alias  = "",
  81         },
  82         [PERF_COUNT_HW_BUS_CYCLES] = {
  83                 .symbol = "bus-cycles",
  84                 .alias  = "",
  85         },
  86         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  87                 .symbol = "stalled-cycles-frontend",
  88                 .alias  = "idle-cycles-frontend",
  89         },
  90         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  91                 .symbol = "stalled-cycles-backend",
  92                 .alias  = "idle-cycles-backend",
  93         },
  94         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  95                 .symbol = "ref-cycles",
  96                 .alias  = "",
  97         },
  98 };
  99
 100 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 101         [PERF_COUNT_SW_CPU_CLOCK] = {
 102                 .symbol = "cpu-clock",
 103                 .alias  = "",
 104         },
 105         [PERF_COUNT_SW_TASK_CLOCK] = {
 106                 .symbol = "task-clock",
 107                 .alias  = "",
 108         },
 109         [PERF_COUNT_SW_PAGE_FAULTS] = {
 110                 .symbol = "page-faults",
 111                 .alias  = "faults",
 112         },
 113         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 114                 .symbol = "context-switches",
 115                 .alias  = "cs",
 116         },
 117         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 118                 .symbol = "cpu-migrations",
 119                 .alias  = "migrations",
 120         },
 121         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 122                 .symbol = "minor-faults",
 123                 .alias  = "",
 124         },
 125         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 126                 .symbol = "major-faults",
 127                 .alias  = "",
 128         },
 129         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 130                 .symbol = "alignment-faults",
 131                 .alias  = "",
 132         },
 133         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 134                 .symbol = "emulation-faults",
 135                 .alias  = "",
 136         },
 137         [PERF_COUNT_SW_DUMMY] = {
 138                 .symbol = "dummy",
 139                 .alias  = "",
 140         },
 141         [PERF_COUNT_SW_BPF_OUTPUT] = {
 142                 .symbol = "bpf-output",
 143                 .alias  = "",
 144         },
 145 };
 146
 147 #define __PERF_EVENT_FIELD(config, name) \
 148         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 149
 150 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 151 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 152 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 153 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 154
 155 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 156         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 157                 if (sys_dirent->d_type == DT_DIR &&             \
 158                     (strcmp(sys_dirent->d_name, ".")) &&        \
 159                     (strcmp(sys_dirent->d_name, "..")))
 160
 161 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 162 {
 163         char evt_path[MAXPATHLEN];
 164         int fd;
 165
 166         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 167         fd = open(evt_path, O_RDONLY);
 168         if (fd < 0)
 169                 return -EINVAL;
 170         close(fd);
 171
 172         return 0;
 173 }
 174
 175 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 176         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 177                 if (evt_dirent->d_type == DT_DIR &&             \
 178                     (strcmp(evt_dirent->d_name, ".")) &&        \
 179                     (strcmp(evt_dirent->d_name, "..")) &&       \
 180                     (!tp_event_has_id(dir_path, evt_dirent)))
 181
 182 #define MAX_EVENT_LENGTH 512
 183
 184
 185 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 186 {
 187         struct tracepoint_path *path = NULL;
 188         DIR *sys_dir, *evt_dir;
 189         struct dirent *sys_dirent, *evt_dirent;
 190         char id_buf[24];
 191         int fd;
 192         u64 id;
 193         char evt_path[MAXPATHLEN];
 194         char *dir_path;
 195
 196         sys_dir = tracing_events__opendir();
 197         if (!sys_dir)
 198                 return NULL;
 199
 200         for_each_subsystem(sys_dir, sys_dirent) {
 201                 dir_path = get_events_file(sys_dirent->d_name);
 202                 if (!dir_path)
 203                         continue;
 204                 evt_dir = opendir(dir_path);
 205                 if (!evt_dir)
 206                         goto next;
 207
 208                 for_each_event(dir_path, evt_dir, evt_dirent) {
 209
 210                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 211                                   evt_dirent->d_name);
 212                         fd = open(evt_path, O_RDONLY);
 213                         if (fd < 0)
 214                                 continue;
 215                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 216                                 close(fd);
 217                                 continue;
 218                         }
 219                         close(fd);
 220                         id = atoll(id_buf);
 221                         if (id == config) {
 222                                 put_events_file(dir_path);
 223                                 closedir(evt_dir);
 224                                 closedir(sys_dir);
 225                                 path = zalloc(sizeof(*path));
 226                                 if (!path)
 227                                         return NULL;
 228                                 path->system = malloc(MAX_EVENT_LENGTH);
 229                                 if (!path->system) {
 230                                         free(path);
 231                                         return NULL;
 232                                 }
 233                                 path->name = malloc(MAX_EVENT_LENGTH);
 234                                 if (!path->name) {
 235                                         zfree(&path->system);
 236                                         free(path);
 237                                         return NULL;
 238                                 }
 239                                 strncpy(path->system, sys_dirent->d_name,
 240                                         MAX_EVENT_LENGTH);
 241                                 strncpy(path->name, evt_dirent->d_name,
 242                                         MAX_EVENT_LENGTH);
 243                                 return path;
 244                         }
 245                 }
 246                 closedir(evt_dir);
 247 next:
 248                 put_events_file(dir_path);
 249         }
 250
 251         closedir(sys_dir);
 252         return NULL;
 253 }
 254
 255 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 256 {
 257         struct tracepoint_path *path = zalloc(sizeof(*path));
 258         char *str = strchr(name, ':');
 259
 260         if (path == NULL || str == NULL) {
 261                 free(path);
 262                 return NULL;
 263         }
 264
 265         path->system = strndup(name, str - name);
 266         path->name = strdup(str+1);
 267
 268         if (path->system == NULL || path->name == NULL) {
 269                 zfree(&path->system);
 270                 zfree(&path->name);
 271                 zfree(&path);
 272         }
 273
 274         return path;
 275 }
 276
 277 const char *event_type(int type)
 278 {
 279         switch (type) {
 280         case PERF_TYPE_HARDWARE:
 281                 return "hardware";
 282
 283         case PERF_TYPE_SOFTWARE:
 284                 return "software";
 285
 286         case PERF_TYPE_TRACEPOINT:
 287                 return "tracepoint";
 288
 289         case PERF_TYPE_HW_CACHE:
 290                 return "hardware-cache";
 291
 292         default:
 293                 break;
 294         }
 295
 296         return "unknown";
 297 }
 298
 299 static int parse_events__is_name_term(struct parse_events_term *term)
 300 {
 301         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 302 }
 303
 304 static char *get_config_name(struct list_head *head_terms)
 305 {
 306         struct parse_events_term *term;
 307
 308         if (!head_terms)
 309                 return NULL;
 310
 311         list_for_each_entry(term, head_terms, list)
 312                 if (parse_events__is_name_term(term))
 313                         return term->val.str;
 314
 315         return NULL;
 316 }
 317
 318 static struct evsel *
 319 __add_event(struct list_head *list, int *idx,
 320             struct perf_event_attr *attr,
 321             char *name, struct perf_pmu *pmu,
 322             struct list_head *config_terms, bool auto_merge_stats,
 323             const char *cpu_list)
 324 {
 325         struct evsel *evsel;
 326         struct perf_cpu_map *cpus = pmu ? pmu->cpus :
 327                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 328
 329         event_attr_init(attr);
 330
 331         evsel = perf_evsel__new_idx(attr, *idx);
 332         if (!evsel)
 333                 return NULL;
 334
 335         (*idx)++;
 336         evsel->core.cpus   = perf_cpu_map__get(cpus);
 337         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 338         evsel->system_wide = pmu ? pmu->is_uncore : false;
 339         evsel->auto_merge_stats = auto_merge_stats;
 340
 341         if (name)
 342                 evsel->name = strdup(name);
 343
 344         if (config_terms)
 345                 list_splice(config_terms, &evsel->config_terms);
 346
 347         list_add_tail(&evsel->core.node, list);
 348         return evsel;
 349 }
 350
 351 static int add_event(struct list_head *list, int *idx,
 352                      struct perf_event_attr *attr, char *name,
 353                      struct list_head *config_terms)
 354 {
 355         return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM;
 356 }
 357
 358 static int add_event_tool(struct list_head *list, int *idx,
 359                           enum perf_tool_event tool_event)
 360 {
 361         struct evsel *evsel;
 362         struct perf_event_attr attr = {
 363                 .type = PERF_TYPE_SOFTWARE,
 364                 .config = PERF_COUNT_SW_DUMMY,
 365         };
 366
 367         evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0");
 368         if (!evsel)
 369                 return -ENOMEM;
 370         evsel->tool_event = tool_event;
 371         if (tool_event == PERF_TOOL_DURATION_TIME)
 372                 evsel->unit = strdup("ns");
 373         return 0;
 374 }
 375
 376 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 377 {
 378         int i, j;
 379         int n, longest = -1;
 380
 381         for (i = 0; i < size; i++) {
 382                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 383                         n = strlen(names[i][j]);
 384                         if (n > longest && !strncasecmp(str, names[i][j], n))
 385                                 longest = n;
 386                 }
 387                 if (longest > 0)
 388                         return i;
 389         }
 390
 391         return -1;
 392 }
 393
 394 typedef int config_term_func_t(struct perf_event_attr *attr,
 395                                struct parse_events_term *term,
 396                                struct parse_events_error *err);
 397 static int config_term_common(struct perf_event_attr *attr,
 398                               struct parse_events_term *term,
 399                               struct parse_events_error *err);
 400 static int config_attr(struct perf_event_attr *attr,
 401                        struct list_head *head,
 402                        struct parse_events_error *err,
 403                        config_term_func_t config_term);
 404
 405 int parse_events_add_cache(struct list_head *list, int *idx,
 406                            char *type, char *op_result1, char *op_result2,
 407                            struct parse_events_error *err,
 408                            struct list_head *head_config)
 409 {
 410         struct perf_event_attr attr;
 411         LIST_HEAD(config_terms);
 412         char name[MAX_NAME_LEN], *config_name;
 413         int cache_type = -1, cache_op = -1, cache_result = -1;
 414         char *op_result[2] = { op_result1, op_result2 };
 415         int i, n;
 416
 417         /*
 418          * No fallback - if we cannot get a clear cache type
 419          * then bail out:
 420          */
 421         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 422                                    PERF_COUNT_HW_CACHE_MAX);
 423         if (cache_type == -1)
 424                 return -EINVAL;
 425
 426         config_name = get_config_name(head_config);
 427         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 428
 429         for (i = 0; (i < 2) && (op_result[i]); i++) {
 430                 char *str = op_result[i];
 431
 432                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 433
 434                 if (cache_op == -1) {
 435                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 436                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 437                         if (cache_op >= 0) {
 438                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 439                                         return -EINVAL;
 440                                 continue;
 441                         }
 442                 }
 443
 444                 if (cache_result == -1) {
 445                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 446                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 447                         if (cache_result >= 0)
 448                                 continue;
 449                 }
 450         }
 451
 452         /*
 453          * Fall back to reads:
 454          */
 455         if (cache_op == -1)
 456                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 457
 458         /*
 459          * Fall back to accesses:
 460          */
 461         if (cache_result == -1)
 462                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 463
 464         memset(&attr, 0, sizeof(attr));
 465         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 466         attr.type = PERF_TYPE_HW_CACHE;
 467
 468         if (head_config) {
 469                 if (config_attr(&attr, head_config, err,
 470                                 config_term_common))
 471                         return -EINVAL;
 472
 473                 if (get_config_terms(head_config, &config_terms))
 474                         return -ENOMEM;
 475         }
 476         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 477 }
 478
 479 static void tracepoint_error(struct parse_events_error *e, int err,
 480                              const char *sys, const char *name)
 481 {
 482         char help[BUFSIZ];
 483
 484         if (!e)
 485                 return;
 486
 487         /*
 488          * We get error directly from syscall errno ( > 0),
 489          * or from encoded pointer's error ( < 0).
 490          */
 491         err = abs(err);
 492
 493         switch (err) {
 494         case EACCES:
 495                 e->str = strdup("can't access trace events");
 496                 break;
 497         case ENOENT:
 498                 e->str = strdup("unknown tracepoint");
 499                 break;
 500         default:
 501                 e->str = strdup("failed to add tracepoint");
 502                 break;
 503         }
 504
 505         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 506         e->help = strdup(help);
 507 }
 508
 509 static int add_tracepoint(struct list_head *list, int *idx,
 510                           const char *sys_name, const char *evt_name,
 511                           struct parse_events_error *err,
 512                           struct list_head *head_config)
 513 {
 514         struct evsel *evsel;
 515
 516         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 517         if (IS_ERR(evsel)) {
 518                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 519                 return PTR_ERR(evsel);
 520         }
 521
 522         if (head_config) {
 523                 LIST_HEAD(config_terms);
 524
 525                 if (get_config_terms(head_config, &config_terms))
 526                         return -ENOMEM;
 527                 list_splice(&config_terms, &evsel->config_terms);
 528         }
 529
 530         list_add_tail(&evsel->core.node, list);
 531         return 0;
 532 }
 533
 534 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 535                                       const char *sys_name, const char *evt_name,
 536                                       struct parse_events_error *err,
 537                                       struct list_head *head_config)
 538 {
 539         char *evt_path;
 540         struct dirent *evt_ent;
 541         DIR *evt_dir;
 542         int ret = 0, found = 0;
 543
 544         evt_path = get_events_file(sys_name);
 545         if (!evt_path) {
 546                 tracepoint_error(err, errno, sys_name, evt_name);
 547                 return -1;
 548         }
 549         evt_dir = opendir(evt_path);
 550         if (!evt_dir) {
 551                 put_events_file(evt_path);
 552                 tracepoint_error(err, errno, sys_name, evt_name);
 553                 return -1;
 554         }
 555
 556         while (!ret && (evt_ent = readdir(evt_dir))) {
 557                 if (!strcmp(evt_ent->d_name, ".")
 558                     || !strcmp(evt_ent->d_name, "..")
 559                     || !strcmp(evt_ent->d_name, "enable")
 560                     || !strcmp(evt_ent->d_name, "filter"))
 561                         continue;
 562
 563                 if (!strglobmatch(evt_ent->d_name, evt_name))
 564                         continue;
 565
 566                 found++;
 567
 568                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 569                                      err, head_config);
 570         }
 571
 572         if (!found) {
 573                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 574                 ret = -1;
 575         }
 576
 577         put_events_file(evt_path);
 578         closedir(evt_dir);
 579         return ret;
 580 }
 581
 582 static int add_tracepoint_event(struct list_head *list, int *idx,
 583                                 const char *sys_name, const char *evt_name,
 584                                 struct parse_events_error *err,
 585                                 struct list_head *head_config)
 586 {
 587         return strpbrk(evt_name, "*?") ?
 588                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 589                                           err, head_config) :
 590                add_tracepoint(list, idx, sys_name, evt_name,
 591                               err, head_config);
 592 }
 593
 594 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 595                                     const char *sys_name, const char *evt_name,
 596                                     struct parse_events_error *err,
 597                                     struct list_head *head_config)
 598 {
 599         struct dirent *events_ent;
 600         DIR *events_dir;
 601         int ret = 0;
 602
 603         events_dir = tracing_events__opendir();
 604         if (!events_dir) {
 605                 tracepoint_error(err, errno, sys_name, evt_name);
 606                 return -1;
 607         }
 608
 609         while (!ret && (events_ent = readdir(events_dir))) {
 610                 if (!strcmp(events_ent->d_name, ".")
 611                     || !strcmp(events_ent->d_name, "..")
 612                     || !strcmp(events_ent->d_name, "enable")
 613                     || !strcmp(events_ent->d_name, "header_event")
 614                     || !strcmp(events_ent->d_name, "header_page"))
 615                         continue;
 616
 617                 if (!strglobmatch(events_ent->d_name, sys_name))
 618                         continue;
 619
 620                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 621                                            evt_name, err, head_config);
 622         }
 623
 624         closedir(events_dir);
 625         return ret;
 626 }
 627
 628 struct __add_bpf_event_param {
 629         struct parse_events_state *parse_state;
 630         struct list_head *list;
 631         struct list_head *head_config;
 632 };
 633
 634 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 635                          void *_param)
 636 {
 637         LIST_HEAD(new_evsels);
 638         struct __add_bpf_event_param *param = _param;
 639         struct parse_events_state *parse_state = param->parse_state;
 640         struct list_head *list = param->list;
 641         struct evsel *pos;
 642         int err;
 643         /*
 644          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 645          * then don't add the tracepoint, this will be used for something else, like
 646          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 647          *
 648          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 649          */
 650         if (group[0] == '!')
 651                 return 0;
 652
 653         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 654                  group, event, fd);
 655
 656         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 657                                           event, parse_state->error,
 658                                           param->head_config);
 659         if (err) {
 660                 struct evsel *evsel, *tmp;
 661
 662                 pr_debug("Failed to add BPF event %s:%s\n",
 663                          group, event);
 664                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 665                         list_del_init(&evsel->core.node);
 666                         evsel__delete(evsel);
 667                 }
 668                 return err;
 669         }
 670         pr_debug("adding %s:%s\n", group, event);
 671
 672         list_for_each_entry(pos, &new_evsels, core.node) {
 673                 pr_debug("adding %s:%s to %p\n",
 674                          group, event, pos);
 675                 pos->bpf_fd = fd;
 676                 pos->bpf_obj = obj;
 677         }
 678         list_splice(&new_evsels, list);
 679         return 0;
 680 }
 681
 682 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 683                               struct list_head *list,
 684                               struct bpf_object *obj,
 685                               struct list_head *head_config)
 686 {
 687         int err;
 688         char errbuf[BUFSIZ];
 689         struct __add_bpf_event_param param = {parse_state, list, head_config};
 690         static bool registered_unprobe_atexit = false;
 691
 692         if (IS_ERR(obj) || !obj) {
 693                 snprintf(errbuf, sizeof(errbuf),
 694                          "Internal error: load bpf obj with NULL");
 695                 err = -EINVAL;
 696                 goto errout;
 697         }
 698
 699         /*
 700          * Register atexit handler before calling bpf__probe() so
 701          * bpf__probe() don't need to unprobe probe points its already
 702          * created when failure.
 703          */
 704         if (!registered_unprobe_atexit) {
 705                 atexit(bpf__clear);
 706                 registered_unprobe_atexit = true;
 707         }
 708
 709         err = bpf__probe(obj);
 710         if (err) {
 711                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 712                 goto errout;
 713         }
 714
 715         err = bpf__load(obj);
 716         if (err) {
 717                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 718                 goto errout;
 719         }
 720
 721         err = bpf__foreach_event(obj, add_bpf_event, &param);
 722         if (err) {
 723                 snprintf(errbuf, sizeof(errbuf),
 724                          "Attach events in BPF object failed");
 725                 goto errout;
 726         }
 727
 728         return 0;
 729 errout:
 730         parse_state->error->help = strdup("(add -v to see detail)");
 731         parse_state->error->str = strdup(errbuf);
 732         return err;
 733 }
 734
 735 static int
 736 parse_events_config_bpf(struct parse_events_state *parse_state,
 737                         struct bpf_object *obj,
 738                         struct list_head *head_config)
 739 {
 740         struct parse_events_term *term;
 741         int error_pos;
 742
 743         if (!head_config || list_empty(head_config))
 744                 return 0;
 745
 746         list_for_each_entry(term, head_config, list) {
 747                 char errbuf[BUFSIZ];
 748                 int err;
 749
 750                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 751                         snprintf(errbuf, sizeof(errbuf),
 752                                  "Invalid config term for BPF object");
 753                         errbuf[BUFSIZ - 1] = '\0';
 754
 755                         parse_state->error->idx = term->err_term;
 756                         parse_state->error->str = strdup(errbuf);
 757                         return -EINVAL;
 758                 }
 759
 760                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 761                 if (err) {
 762                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 763                                                  &error_pos, err, errbuf,
 764                                                  sizeof(errbuf));
 765                         parse_state->error->help = strdup(
 766 "Hint:\tValid config terms:\n"
 767 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 768 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 769 "\n"
 770 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 771 "     \t(add -v to see detail)");
 772                         parse_state->error->str = strdup(errbuf);
 773                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 774                                 parse_state->error->idx = term->err_val;
 775                         else
 776                                 parse_state->error->idx = term->err_term + error_pos;
 777                         return err;
 778                 }
 779         }
 780         return 0;
 781 }
 782
 783 /*
 784  * Split config terms:
 785  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 786  *  'call-graph=fp' is 'evt config', should be applied to each
 787  *  events in bpf.c.
 788  * 'map:array.value[0]=1' is 'obj config', should be processed
 789  * with parse_events_config_bpf.
 790  *
 791  * Move object config terms from the first list to obj_head_config.
 792  */
 793 static void
 794 split_bpf_config_terms(struct list_head *evt_head_config,
 795                        struct list_head *obj_head_config)
 796 {
 797         struct parse_events_term *term, *temp;
 798
 799         /*
 800          * Currectly, all possible user config term
 801          * belong to bpf object. parse_events__is_hardcoded_term()
 802          * happends to be a good flag.
 803          *
 804          * See parse_events_config_bpf() and
 805          * config_term_tracepoint().
 806          */
 807         list_for_each_entry_safe(term, temp, evt_head_config, list)
 808                 if (!parse_events__is_hardcoded_term(term))
 809                         list_move_tail(&term->list, obj_head_config);
 810 }
 811
 812 int parse_events_load_bpf(struct parse_events_state *parse_state,
 813                           struct list_head *list,
 814                           char *bpf_file_name,
 815                           bool source,
 816                           struct list_head *head_config)
 817 {
 818         int err;
 819         struct bpf_object *obj;
 820         LIST_HEAD(obj_head_config);
 821
 822         if (head_config)
 823                 split_bpf_config_terms(head_config, &obj_head_config);
 824
 825         obj = bpf__prepare_load(bpf_file_name, source);
 826         if (IS_ERR(obj)) {
 827                 char errbuf[BUFSIZ];
 828
 829                 err = PTR_ERR(obj);
 830
 831                 if (err == -ENOTSUP)
 832                         snprintf(errbuf, sizeof(errbuf),
 833                                  "BPF support is not compiled");
 834                 else
 835                         bpf__strerror_prepare_load(bpf_file_name,
 836                                                    source,
 837                                                    -err, errbuf,
 838                                                    sizeof(errbuf));
 839
 840                 parse_state->error->help = strdup("(add -v to see detail)");
 841                 parse_state->error->str = strdup(errbuf);
 842                 return err;
 843         }
 844
 845         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 846         if (err)
 847                 return err;
 848         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 849
 850         /*
 851          * Caller doesn't know anything about obj_head_config,
 852          * so combine them together again before returnning.
 853          */
 854         if (head_config)
 855                 list_splice_tail(&obj_head_config, head_config);
 856         return err;
 857 }
 858
 859 static int
 860 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 861 {
 862         int i;
 863
 864         for (i = 0; i < 3; i++) {
 865                 if (!type || !type[i])
 866                         break;
 867
 868 #define CHECK_SET_TYPE(bit)             \
 869 do {                                    \
 870         if (attr->bp_type & bit)        \
 871                 return -EINVAL;         \
 872         else                            \
 873                 attr->bp_type |= bit;   \
 874 } while (0)
 875
 876                 switch (type[i]) {
 877                 case 'r':
 878                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 879                         break;
 880                 case 'w':
 881                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 882                         break;
 883                 case 'x':
 884                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 885                         break;
 886                 default:
 887                         return -EINVAL;
 888                 }
 889         }
 890
 891 #undef CHECK_SET_TYPE
 892
 893         if (!attr->bp_type) /* Default */
 894                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 895
 896         return 0;
 897 }
 898
 899 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 900                                 void *ptr, char *type, u64 len)
 901 {
 902         struct perf_event_attr attr;
 903
 904         memset(&attr, 0, sizeof(attr));
 905         attr.bp_addr = (unsigned long) ptr;
 906
 907         if (parse_breakpoint_type(type, &attr))
 908                 return -EINVAL;
 909
 910         /* Provide some defaults if len is not specified */
 911         if (!len) {
 912                 if (attr.bp_type == HW_BREAKPOINT_X)
 913                         len = sizeof(long);
 914                 else
 915                         len = HW_BREAKPOINT_LEN_4;
 916         }
 917
 918         attr.bp_len = len;
 919
 920         attr.type = PERF_TYPE_BREAKPOINT;
 921         attr.sample_period = 1;
 922
 923         return add_event(list, idx, &attr, NULL, NULL);
 924 }
 925
 926 static int check_type_val(struct parse_events_term *term,
 927                           struct parse_events_error *err,
 928                           int type)
 929 {
 930         if (type == term->type_val)
 931                 return 0;
 932
 933         if (err) {
 934                 err->idx = term->err_val;
 935                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 936                         err->str = strdup("expected numeric value");
 937                 else
 938                         err->str = strdup("expected string value");
 939         }
 940         return -EINVAL;
 941 }
 942
 943 /*
 944  * Update according to parse-events.l
 945  */
 946 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 947         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 948         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 949         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 950         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 951         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 952         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 953         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 954         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 955         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 956         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 957         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 958         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 959         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 960         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 961         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
 962         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 963         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 964         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 965         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
 966         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
 967 };
 968
 969 static bool config_term_shrinked;
 970
 971 static bool
 972 config_term_avail(int term_type, struct parse_events_error *err)
 973 {
 974         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 975                 err->str = strdup("Invalid term_type");
 976                 return false;
 977         }
 978         if (!config_term_shrinked)
 979                 return true;
 980
 981         switch (term_type) {
 982         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 983         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 984         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 985         case PARSE_EVENTS__TERM_TYPE_NAME:
 986         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 987         case PARSE_EVENTS__TERM_TYPE_PERCORE:
 988                 return true;
 989         default:
 990                 if (!err)
 991                         return false;
 992
 993                 /* term_type is validated so indexing is safe */
 994                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 995                              config_term_names[term_type]) < 0)
 996                         err->str = NULL;
 997                 return false;
 998         }
 999 }
1000
1001 void parse_events__shrink_config_terms(void)
1002 {
1003         config_term_shrinked = true;
1004 }
1005
1006 static int config_term_common(struct perf_event_attr *attr,
1007                               struct parse_events_term *term,
1008                               struct parse_events_error *err)
1009 {
1010 #define CHECK_TYPE_VAL(type)                                               \
1011 do {                                                                       \
1012         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1013                 return -EINVAL;                                            \
1014 } while (0)
1015
1016         switch (term->type_term) {
1017         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1018                 CHECK_TYPE_VAL(NUM);
1019                 attr->config = term->val.num;
1020                 break;
1021         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1022                 CHECK_TYPE_VAL(NUM);
1023                 attr->config1 = term->val.num;
1024                 break;
1025         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1026                 CHECK_TYPE_VAL(NUM);
1027                 attr->config2 = term->val.num;
1028                 break;
1029         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1030                 CHECK_TYPE_VAL(NUM);
1031                 break;
1032         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1033                 CHECK_TYPE_VAL(NUM);
1034                 break;
1035         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1036                 CHECK_TYPE_VAL(STR);
1037                 if (strcmp(term->val.str, "no") &&
1038                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1039                         err->str = strdup("invalid branch sample type");
1040                         err->idx = term->err_val;
1041                         return -EINVAL;
1042                 }
1043                 break;
1044         case PARSE_EVENTS__TERM_TYPE_TIME:
1045                 CHECK_TYPE_VAL(NUM);
1046                 if (term->val.num > 1) {
1047                         err->str = strdup("expected 0 or 1");
1048                         err->idx = term->err_val;
1049                         return -EINVAL;
1050                 }
1051                 break;
1052         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1053                 CHECK_TYPE_VAL(STR);
1054                 break;
1055         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1056                 CHECK_TYPE_VAL(NUM);
1057                 break;
1058         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1059                 CHECK_TYPE_VAL(NUM);
1060                 break;
1061         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1062                 CHECK_TYPE_VAL(NUM);
1063                 break;
1064         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1065                 CHECK_TYPE_VAL(NUM);
1066                 break;
1067         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1068                 CHECK_TYPE_VAL(NUM);
1069                 break;
1070         case PARSE_EVENTS__TERM_TYPE_NAME:
1071                 CHECK_TYPE_VAL(STR);
1072                 break;
1073         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1074                 CHECK_TYPE_VAL(NUM);
1075                 break;
1076         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1077                 CHECK_TYPE_VAL(NUM);
1078                 break;
1079         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1080                 CHECK_TYPE_VAL(NUM);
1081                 if ((unsigned int)term->val.num > 1) {
1082                         err->str = strdup("expected 0 or 1");
1083                         err->idx = term->err_val;
1084                         return -EINVAL;
1085                 }
1086                 break;
1087         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1088                 CHECK_TYPE_VAL(NUM);
1089                 break;
1090         default:
1091                 err->str = strdup("unknown term");
1092                 err->idx = term->err_term;
1093                 err->help = parse_events_formats_error_string(NULL);
1094                 return -EINVAL;
1095         }
1096
1097         /*
1098          * Check term availbility after basic checking so
1099          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1100          *
1101          * If check availbility at the entry of this function,
1102          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1103          * if an invalid config term is provided for legacy events
1104          * (for example, instructions/badterm/...), which is confusing.
1105          */
1106         if (!config_term_avail(term->type_term, err))
1107                 return -EINVAL;
1108         return 0;
1109 #undef CHECK_TYPE_VAL
1110 }
1111
1112 static int config_term_pmu(struct perf_event_attr *attr,
1113                            struct parse_events_term *term,
1114                            struct parse_events_error *err)
1115 {
1116         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1117             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1118                 /*
1119                  * Always succeed for sysfs terms, as we dont know
1120                  * at this point what type they need to have.
1121                  */
1122                 return 0;
1123         else
1124                 return config_term_common(attr, term, err);
1125 }
1126
1127 static int config_term_tracepoint(struct perf_event_attr *attr,
1128                                   struct parse_events_term *term,
1129                                   struct parse_events_error *err)
1130 {
1131         switch (term->type_term) {
1132         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1133         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1134         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1135         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1136         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1137         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1138         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1139         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1140         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1141                 return config_term_common(attr, term, err);
1142         default:
1143                 if (err) {
1144                         err->idx = term->err_term;
1145                         err->str = strdup("unknown term");
1146                         err->help = strdup("valid terms: call-graph,stack-size\n");
1147                 }
1148                 return -EINVAL;
1149         }
1150
1151         return 0;
1152 }
1153
1154 static int config_attr(struct perf_event_attr *attr,
1155                        struct list_head *head,
1156                        struct parse_events_error *err,
1157                        config_term_func_t config_term)
1158 {
1159         struct parse_events_term *term;
1160
1161         list_for_each_entry(term, head, list)
1162                 if (config_term(attr, term, err))
1163                         return -EINVAL;
1164
1165         return 0;
1166 }
1167
1168 static int get_config_terms(struct list_head *head_config,
1169                             struct list_head *head_terms __maybe_unused)
1170 {
1171 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1172 do {                                                            \
1173         struct perf_evsel_config_term *__t;                     \
1174                                                                 \
1175         __t = zalloc(sizeof(*__t));                             \
1176         if (!__t)                                               \
1177                 return -ENOMEM;                                 \
1178                                                                 \
1179         INIT_LIST_HEAD(&__t->list);                             \
1180         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1181         __t->val.__name = __val;                                \
1182         __t->weak       = term->weak;                           \
1183         list_add_tail(&__t->list, head_terms);                  \
1184 } while (0)
1185
1186         struct parse_events_term *term;
1187
1188         list_for_each_entry(term, head_config, list) {
1189                 switch (term->type_term) {
1190                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1191                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1192                         break;
1193                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1194                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1195                         break;
1196                 case PARSE_EVENTS__TERM_TYPE_TIME:
1197                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1198                         break;
1199                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1200                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1201                         break;
1202                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1203                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1204                         break;
1205                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1206                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1207                         break;
1208                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1209                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1210                         break;
1211                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1212                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1213                         break;
1214                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1215                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1216                         break;
1217                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1218                         ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1219                         break;
1220                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1221                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1222                         break;
1223                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1224                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1225                         break;
1226                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1227                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1228                         break;
1229                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1230                         ADD_CONFIG_TERM(PERCORE, percore,
1231                                         term->val.num ? true : false);
1232                         break;
1233                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1234                         ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
1235                         break;
1236                 default:
1237                         break;
1238                 }
1239         }
1240 #undef ADD_EVSEL_CONFIG
1241         return 0;
1242 }
1243
1244 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1245                                 const char *sys, const char *event,
1246                                 struct parse_events_error *err,
1247                                 struct list_head *head_config)
1248 {
1249         if (head_config) {
1250                 struct perf_event_attr attr;
1251
1252                 if (config_attr(&attr, head_config, err,
1253                                 config_term_tracepoint))
1254                         return -EINVAL;
1255         }
1256
1257         if (strpbrk(sys, "*?"))
1258                 return add_tracepoint_multi_sys(list, idx, sys, event,
1259                                                 err, head_config);
1260         else
1261                 return add_tracepoint_event(list, idx, sys, event,
1262                                             err, head_config);
1263 }
1264
1265 int parse_events_add_numeric(struct parse_events_state *parse_state,
1266                              struct list_head *list,
1267                              u32 type, u64 config,
1268                              struct list_head *head_config)
1269 {
1270         struct perf_event_attr attr;
1271         LIST_HEAD(config_terms);
1272
1273         memset(&attr, 0, sizeof(attr));
1274         attr.type = type;
1275         attr.config = config;
1276
1277         if (head_config) {
1278                 if (config_attr(&attr, head_config, parse_state->error,
1279                                 config_term_common))
1280                         return -EINVAL;
1281
1282                 if (get_config_terms(head_config, &config_terms))
1283                         return -ENOMEM;
1284         }
1285
1286         return add_event(list, &parse_state->idx, &attr,
1287                          get_config_name(head_config), &config_terms);
1288 }
1289
1290 int parse_events_add_tool(struct parse_events_state *parse_state,
1291                           struct list_head *list,
1292                           enum perf_tool_event tool_event)
1293 {
1294         return add_event_tool(list, &parse_state->idx, tool_event);
1295 }
1296
1297 static bool config_term_percore(struct list_head *config_terms)
1298 {
1299         struct perf_evsel_config_term *term;
1300
1301         list_for_each_entry(term, config_terms, list) {
1302                 if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
1303                         return term->val.percore;
1304         }
1305
1306         return false;
1307 }
1308
1309 int parse_events_add_pmu(struct parse_events_state *parse_state,
1310                          struct list_head *list, char *name,
1311                          struct list_head *head_config,
1312                          bool auto_merge_stats,
1313                          bool use_alias)
1314 {
1315         struct perf_event_attr attr;
1316         struct perf_pmu_info info;
1317         struct perf_pmu *pmu;
1318         struct evsel *evsel;
1319         struct parse_events_error *err = parse_state->error;
1320         bool use_uncore_alias;
1321         LIST_HEAD(config_terms);
1322
1323         pmu = perf_pmu__find(name);
1324         if (!pmu) {
1325                 if (asprintf(&err->str,
1326                                 "Cannot find PMU `%s'. Missing kernel support?",
1327                                 name) < 0)
1328                         err->str = NULL;
1329                 return -EINVAL;
1330         }
1331
1332         if (pmu->default_config) {
1333                 memcpy(&attr, pmu->default_config,
1334                        sizeof(struct perf_event_attr));
1335         } else {
1336                 memset(&attr, 0, sizeof(attr));
1337         }
1338
1339         use_uncore_alias = (pmu->is_uncore && use_alias);
1340
1341         if (!head_config) {
1342                 attr.type = pmu->type;
1343                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1344                                     auto_merge_stats, NULL);
1345                 if (evsel) {
1346                         evsel->pmu_name = name;
1347                         evsel->use_uncore_alias = use_uncore_alias;
1348                         return 0;
1349                 } else {
1350                         return -ENOMEM;
1351                 }
1352         }
1353
1354         if (perf_pmu__check_alias(pmu, head_config, &info))
1355                 return -EINVAL;
1356
1357         /*
1358          * Configure hardcoded terms first, no need to check
1359          * return value when called with fail == 0 ;)
1360          */
1361         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1362                 return -EINVAL;
1363
1364         if (get_config_terms(head_config, &config_terms))
1365                 return -ENOMEM;
1366
1367         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1368                 return -EINVAL;
1369
1370         evsel = __add_event(list, &parse_state->idx, &attr,
1371                             get_config_name(head_config), pmu,
1372                             &config_terms, auto_merge_stats, NULL);
1373         if (evsel) {
1374                 evsel->unit = info.unit;
1375                 evsel->scale = info.scale;
1376                 evsel->per_pkg = info.per_pkg;
1377                 evsel->snapshot = info.snapshot;
1378                 evsel->metric_expr = info.metric_expr;
1379                 evsel->metric_name = info.metric_name;
1380                 evsel->pmu_name = name;
1381                 evsel->use_uncore_alias = use_uncore_alias;
1382                 evsel->percore = config_term_percore(&evsel->config_terms);
1383         }
1384
1385         return evsel ? 0 : -ENOMEM;
1386 }
1387
1388 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1389                                char *str, struct list_head **listp)
1390 {
1391         struct list_head *head;
1392         struct parse_events_term *term;
1393         struct list_head *list;
1394         struct perf_pmu *pmu = NULL;
1395         int ok = 0;
1396
1397         *listp = NULL;
1398         /* Add it for all PMUs that support the alias */
1399         list = malloc(sizeof(struct list_head));
1400         if (!list)
1401                 return -1;
1402         INIT_LIST_HEAD(list);
1403         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1404                 struct perf_pmu_alias *alias;
1405
1406                 list_for_each_entry(alias, &pmu->aliases, list) {
1407                         if (!strcasecmp(alias->name, str)) {
1408                                 head = malloc(sizeof(struct list_head));
1409                                 if (!head)
1410                                         return -1;
1411                                 INIT_LIST_HEAD(head);
1412                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1413                                                            str, 1, false, &str, NULL) < 0)
1414                                         return -1;
1415                                 list_add_tail(&term->list, head);
1416
1417                                 if (!parse_events_add_pmu(parse_state, list,
1418                                                           pmu->name, head,
1419                                                           true, true)) {
1420                                         pr_debug("%s -> %s/%s/\n", str,
1421                                                  pmu->name, alias->str);
1422                                         ok++;
1423                                 }
1424
1425                                 parse_events_terms__delete(head);
1426                         }
1427                 }
1428         }
1429         if (!ok)
1430                 return -1;
1431         *listp = list;
1432         return 0;
1433 }
1434
1435 int parse_events__modifier_group(struct list_head *list,
1436                                  char *event_mod)
1437 {
1438         return parse_events__modifier_event(list, event_mod, true);
1439 }
1440
1441 /*
1442  * Check if the two uncore PMUs are from the same uncore block
1443  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1444  */
1445 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1446 {
1447         char *end_a, *end_b;
1448
1449         end_a = strrchr(pmu_name_a, '_');
1450         end_b = strrchr(pmu_name_b, '_');
1451
1452         if (!end_a || !end_b)
1453                 return false;
1454
1455         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1456                 return false;
1457
1458         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1459 }
1460
1461 static int
1462 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1463                                            struct parse_events_state *parse_state)
1464 {
1465         struct evsel *evsel, *leader;
1466         uintptr_t *leaders;
1467         bool is_leader = true;
1468         int i, nr_pmu = 0, total_members, ret = 0;
1469
1470         leader = list_first_entry(list, struct evsel, core.node);
1471         evsel = list_last_entry(list, struct evsel, core.node);
1472         total_members = evsel->idx - leader->idx + 1;
1473
1474         leaders = calloc(total_members, sizeof(uintptr_t));
1475         if (WARN_ON(!leaders))
1476                 return 0;
1477
1478         /*
1479          * Going through the whole group and doing sanity check.
1480          * All members must use alias, and be from the same uncore block.
1481          * Also, storing the leader events in an array.
1482          */
1483         __evlist__for_each_entry(list, evsel) {
1484
1485                 /* Only split the uncore group which members use alias */
1486                 if (!evsel->use_uncore_alias)
1487                         goto out;
1488
1489                 /* The events must be from the same uncore block */
1490                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1491                         goto out;
1492
1493                 if (!is_leader)
1494                         continue;
1495                 /*
1496                  * If the event's PMU name starts to repeat, it must be a new
1497                  * event. That can be used to distinguish the leader from
1498                  * other members, even they have the same event name.
1499                  */
1500                 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1501                         is_leader = false;
1502                         continue;
1503                 }
1504                 /* The name is always alias name */
1505                 WARN_ON(strcmp(leader->name, evsel->name));
1506
1507                 /* Store the leader event for each PMU */
1508                 leaders[nr_pmu++] = (uintptr_t) evsel;
1509         }
1510
1511         /* only one event alias */
1512         if (nr_pmu == total_members) {
1513                 parse_state->nr_groups--;
1514                 goto handled;
1515         }
1516
1517         /*
1518          * An uncore event alias is a joint name which means the same event
1519          * runs on all PMUs of a block.
1520          * Perf doesn't support mixed events from different PMUs in the same
1521          * group. The big group has to be split into multiple small groups
1522          * which only include the events from the same PMU.
1523          *
1524          * Here the uncore event aliases must be from the same uncore block.
1525          * The number of PMUs must be same for each alias. The number of new
1526          * small groups equals to the number of PMUs.
1527          * Setting the leader event for corresponding members in each group.
1528          */
1529         i = 0;
1530         __evlist__for_each_entry(list, evsel) {
1531                 if (i >= nr_pmu)
1532                         i = 0;
1533                 evsel->leader = (struct evsel *) leaders[i++];
1534         }
1535
1536         /* The number of members and group name are same for each group */
1537         for (i = 0; i < nr_pmu; i++) {
1538                 evsel = (struct evsel *) leaders[i];
1539                 evsel->core.nr_members = total_members / nr_pmu;
1540                 evsel->group_name = name ? strdup(name) : NULL;
1541         }
1542
1543         /* Take the new small groups into account */
1544         parse_state->nr_groups += nr_pmu - 1;
1545
1546 handled:
1547         ret = 1;
1548 out:
1549         free(leaders);
1550         return ret;
1551 }
1552
1553 void parse_events__set_leader(char *name, struct list_head *list,
1554                               struct parse_events_state *parse_state)
1555 {
1556         struct evsel *leader;
1557
1558         if (list_empty(list)) {
1559                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1560                 return;
1561         }
1562
1563         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1564                 return;
1565
1566         __perf_evlist__set_leader(list);
1567         leader = list_entry(list->next, struct evsel, core.node);
1568         leader->group_name = name ? strdup(name) : NULL;
1569 }
1570
1571 /* list_event is assumed to point to malloc'ed memory */
1572 void parse_events_update_lists(struct list_head *list_event,
1573                                struct list_head *list_all)
1574 {
1575         /*
1576          * Called for single event definition. Update the
1577          * 'all event' list, and reinit the 'single event'
1578          * list, for next event definition.
1579          */
1580         list_splice_tail(list_event, list_all);
1581         free(list_event);
1582 }
1583
1584 struct event_modifier {
1585         int eu;
1586         int ek;
1587         int eh;
1588         int eH;
1589         int eG;
1590         int eI;
1591         int precise;
1592         int precise_max;
1593         int exclude_GH;
1594         int sample_read;
1595         int pinned;
1596         int weak;
1597 };
1598
1599 static int get_event_modifier(struct event_modifier *mod, char *str,
1600                                struct evsel *evsel)
1601 {
1602         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1603         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1604         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1605         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1606         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1607         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1608         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1609         int precise_max = 0;
1610         int sample_read = 0;
1611         int pinned = evsel ? evsel->core.attr.pinned : 0;
1612
1613         int exclude = eu | ek | eh;
1614         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1615         int weak = 0;
1616
1617         memset(mod, 0, sizeof(*mod));
1618
1619         while (*str) {
1620                 if (*str == 'u') {
1621                         if (!exclude)
1622                                 exclude = eu = ek = eh = 1;
1623                         eu = 0;
1624                 } else if (*str == 'k') {
1625                         if (!exclude)
1626                                 exclude = eu = ek = eh = 1;
1627                         ek = 0;
1628                 } else if (*str == 'h') {
1629                         if (!exclude)
1630                                 exclude = eu = ek = eh = 1;
1631                         eh = 0;
1632                 } else if (*str == 'G') {
1633                         if (!exclude_GH)
1634                                 exclude_GH = eG = eH = 1;
1635                         eG = 0;
1636                 } else if (*str == 'H') {
1637                         if (!exclude_GH)
1638                                 exclude_GH = eG = eH = 1;
1639                         eH = 0;
1640                 } else if (*str == 'I') {
1641                         eI = 1;
1642                 } else if (*str == 'p') {
1643                         precise++;
1644                         /* use of precise requires exclude_guest */
1645                         if (!exclude_GH)
1646                                 eG = 1;
1647                 } else if (*str == 'P') {
1648                         precise_max = 1;
1649                 } else if (*str == 'S') {
1650                         sample_read = 1;
1651                 } else if (*str == 'D') {
1652                         pinned = 1;
1653                 } else if (*str == 'W') {
1654                         weak = 1;
1655                 } else
1656                         break;
1657
1658                 ++str;
1659         }
1660
1661         /*
1662          * precise ip:
1663          *
1664          *  0 - SAMPLE_IP can have arbitrary skid
1665          *  1 - SAMPLE_IP must have constant skid
1666          *  2 - SAMPLE_IP requested to have 0 skid
1667          *  3 - SAMPLE_IP must have 0 skid
1668          *
1669          *  See also PERF_RECORD_MISC_EXACT_IP
1670          */
1671         if (precise > 3)
1672                 return -EINVAL;
1673
1674         mod->eu = eu;
1675         mod->ek = ek;
1676         mod->eh = eh;
1677         mod->eH = eH;
1678         mod->eG = eG;
1679         mod->eI = eI;
1680         mod->precise = precise;
1681         mod->precise_max = precise_max;
1682         mod->exclude_GH = exclude_GH;
1683         mod->sample_read = sample_read;
1684         mod->pinned = pinned;
1685         mod->weak = weak;
1686
1687         return 0;
1688 }
1689
1690 /*
1691  * Basic modifier sanity check to validate it contains only one
1692  * instance of any modifier (apart from 'p') present.
1693  */
1694 static int check_modifier(char *str)
1695 {
1696         char *p = str;
1697
1698         /* The sizeof includes 0 byte as well. */
1699         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1700                 return -1;
1701
1702         while (*p) {
1703                 if (*p != 'p' && strchr(p + 1, *p))
1704                         return -1;
1705                 p++;
1706         }
1707
1708         return 0;
1709 }
1710
1711 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1712 {
1713         struct evsel *evsel;
1714         struct event_modifier mod;
1715
1716         if (str == NULL)
1717                 return 0;
1718
1719         if (check_modifier(str))
1720                 return -EINVAL;
1721
1722         if (!add && get_event_modifier(&mod, str, NULL))
1723                 return -EINVAL;
1724
1725         __evlist__for_each_entry(list, evsel) {
1726                 if (add && get_event_modifier(&mod, str, evsel))
1727                         return -EINVAL;
1728
1729                 evsel->core.attr.exclude_user   = mod.eu;
1730                 evsel->core.attr.exclude_kernel = mod.ek;
1731                 evsel->core.attr.exclude_hv     = mod.eh;
1732                 evsel->core.attr.precise_ip     = mod.precise;
1733                 evsel->core.attr.exclude_host   = mod.eH;
1734                 evsel->core.attr.exclude_guest  = mod.eG;
1735                 evsel->core.attr.exclude_idle   = mod.eI;
1736                 evsel->exclude_GH          = mod.exclude_GH;
1737                 evsel->sample_read         = mod.sample_read;
1738                 evsel->precise_max         = mod.precise_max;
1739                 evsel->weak_group          = mod.weak;
1740
1741                 if (perf_evsel__is_group_leader(evsel))
1742                         evsel->core.attr.pinned = mod.pinned;
1743         }
1744
1745         return 0;
1746 }
1747
1748 int parse_events_name(struct list_head *list, char *name)
1749 {
1750         struct evsel *evsel;
1751
1752         __evlist__for_each_entry(list, evsel) {
1753                 if (!evsel->name)
1754                         evsel->name = strdup(name);
1755         }
1756
1757         return 0;
1758 }
1759
1760 static int
1761 comp_pmu(const void *p1, const void *p2)
1762 {
1763         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1764         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1765
1766         return strcasecmp(pmu1->symbol, pmu2->symbol);
1767 }
1768
1769 static void perf_pmu__parse_cleanup(void)
1770 {
1771         if (perf_pmu_events_list_num > 0) {
1772                 struct perf_pmu_event_symbol *p;
1773                 int i;
1774
1775                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1776                         p = perf_pmu_events_list + i;
1777                         zfree(&p->symbol);
1778                 }
1779                 zfree(&perf_pmu_events_list);
1780                 perf_pmu_events_list_num = 0;
1781         }
1782 }
1783
1784 #define SET_SYMBOL(str, stype)          \
1785 do {                                    \
1786         p->symbol = str;                \
1787         if (!p->symbol)                 \
1788                 goto err;               \
1789         p->type = stype;                \
1790 } while (0)
1791
1792 /*
1793  * Read the pmu events list from sysfs
1794  * Save it into perf_pmu_events_list
1795  */
1796 static void perf_pmu__parse_init(void)
1797 {
1798
1799         struct perf_pmu *pmu = NULL;
1800         struct perf_pmu_alias *alias;
1801         int len = 0;
1802
1803         pmu = NULL;
1804         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1805                 list_for_each_entry(alias, &pmu->aliases, list) {
1806                         if (strchr(alias->name, '-'))
1807                                 len++;
1808                         len++;
1809                 }
1810         }
1811
1812         if (len == 0) {
1813                 perf_pmu_events_list_num = -1;
1814                 return;
1815         }
1816         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1817         if (!perf_pmu_events_list)
1818                 return;
1819         perf_pmu_events_list_num = len;
1820
1821         len = 0;
1822         pmu = NULL;
1823         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1824                 list_for_each_entry(alias, &pmu->aliases, list) {
1825                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1826                         char *tmp = strchr(alias->name, '-');
1827
1828                         if (tmp != NULL) {
1829                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1830                                                 PMU_EVENT_SYMBOL_PREFIX);
1831                                 p++;
1832                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1833                                 len += 2;
1834                         } else {
1835                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1836                                 len++;
1837                         }
1838                 }
1839         }
1840         qsort(perf_pmu_events_list, len,
1841                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1842
1843         return;
1844 err:
1845         perf_pmu__parse_cleanup();
1846 }
1847
1848 enum perf_pmu_event_symbol_type
1849 perf_pmu__parse_check(const char *name)
1850 {
1851         struct perf_pmu_event_symbol p, *r;
1852
1853         /* scan kernel pmu events from sysfs if needed */
1854         if (perf_pmu_events_list_num == 0)
1855                 perf_pmu__parse_init();
1856         /*
1857          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1858          * cpu-cycles has been handled by hardcode.
1859          * So it must be cpu// events, not kernel pmu event.
1860          */
1861         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1862                 return PMU_EVENT_SYMBOL_ERR;
1863
1864         p.symbol = strdup(name);
1865         r = bsearch(&p, perf_pmu_events_list,
1866                         (size_t) perf_pmu_events_list_num,
1867                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1868         zfree(&p.symbol);
1869         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1870 }
1871
1872 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1873 {
1874         YY_BUFFER_STATE buffer;
1875         void *scanner;
1876         int ret;
1877
1878         ret = parse_events_lex_init_extra(start_token, &scanner);
1879         if (ret)
1880                 return ret;
1881
1882         buffer = parse_events__scan_string(str, scanner);
1883
1884 #ifdef PARSER_DEBUG
1885         parse_events_debug = 1;
1886 #endif
1887         ret = parse_events_parse(parse_state, scanner);
1888
1889         parse_events__flush_buffer(buffer, scanner);
1890         parse_events__delete_buffer(buffer, scanner);
1891         parse_events_lex_destroy(scanner);
1892         return ret;
1893 }
1894
1895 /*
1896  * parse event config string, return a list of event terms.
1897  */
1898 int parse_events_terms(struct list_head *terms, const char *str)
1899 {
1900         struct parse_events_state parse_state = {
1901                 .terms = NULL,
1902         };
1903         int ret;
1904
1905         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1906         if (!ret) {
1907                 list_splice(parse_state.terms, terms);
1908                 zfree(&parse_state.terms);
1909                 return 0;
1910         }
1911
1912         parse_events_terms__delete(parse_state.terms);
1913         return ret;
1914 }
1915
1916 int parse_events(struct evlist *evlist, const char *str,
1917                  struct parse_events_error *err)
1918 {
1919         struct parse_events_state parse_state = {
1920                 .list   = LIST_HEAD_INIT(parse_state.list),
1921                 .idx    = evlist->core.nr_entries,
1922                 .error  = err,
1923                 .evlist = evlist,
1924         };
1925         int ret;
1926
1927         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1928         perf_pmu__parse_cleanup();
1929         if (!ret) {
1930                 struct evsel *last;
1931
1932                 if (list_empty(&parse_state.list)) {
1933                         WARN_ONCE(true, "WARNING: event parser found nothing\n");
1934                         return -1;
1935                 }
1936
1937                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1938                 evlist->nr_groups += parse_state.nr_groups;
1939                 last = perf_evlist__last(evlist);
1940                 last->cmdline_group_boundary = true;
1941
1942                 return 0;
1943         }
1944
1945         /*
1946          * There are 2 users - builtin-record and builtin-test objects.
1947          * Both call evlist__delete in case of error, so we dont
1948          * need to bother.
1949          */
1950         return ret;
1951 }
1952
1953 #define MAX_WIDTH 1000
1954 static int get_term_width(void)
1955 {
1956         struct winsize ws;
1957
1958         get_term_dimensions(&ws);
1959         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1960 }
1961
1962 void parse_events_print_error(struct parse_events_error *err,
1963                               const char *event)
1964 {
1965         const char *str = "invalid or unsupported event: ";
1966         char _buf[MAX_WIDTH];
1967         char *buf = (char *) event;
1968         int idx = 0;
1969
1970         if (err->str) {
1971                 /* -2 for extra '' in the final fprintf */
1972                 int width       = get_term_width() - 2;
1973                 int len_event   = strlen(event);
1974                 int len_str, max_len, cut = 0;
1975
1976                 /*
1977                  * Maximum error index indent, we will cut
1978                  * the event string if it's bigger.
1979                  */
1980                 int max_err_idx = 13;
1981
1982                 /*
1983                  * Let's be specific with the message when
1984                  * we have the precise error.
1985                  */
1986                 str     = "event syntax error: ";
1987                 len_str = strlen(str);
1988                 max_len = width - len_str;
1989
1990                 buf = _buf;
1991
1992                 /* We're cutting from the beginning. */
1993                 if (err->idx > max_err_idx)
1994                         cut = err->idx - max_err_idx;
1995
1996                 strncpy(buf, event + cut, max_len);
1997
1998                 /* Mark cut parts with '..' on both sides. */
1999                 if (cut)
2000                         buf[0] = buf[1] = '.';
2001
2002                 if ((len_event - cut) > max_len) {
2003                         buf[max_len - 1] = buf[max_len - 2] = '.';
2004                         buf[max_len] = 0;
2005                 }
2006
2007                 idx = len_str + err->idx - cut;
2008         }
2009
2010         fprintf(stderr, "%s'%s'\n", str, buf);
2011         if (idx) {
2012                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
2013                 if (err->help)
2014                         fprintf(stderr, "\n%s\n", err->help);
2015                 zfree(&err->str);
2016                 zfree(&err->help);
2017         }
2018 }
2019
2020 #undef MAX_WIDTH
2021
2022 int parse_events_option(const struct option *opt, const char *str,
2023                         int unset __maybe_unused)
2024 {
2025         struct evlist *evlist = *(struct evlist **)opt->value;
2026         struct parse_events_error err = { .idx = 0, };
2027         int ret = parse_events(evlist, str, &err);
2028
2029         if (ret) {
2030                 parse_events_print_error(&err, str);
2031                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2032         }
2033
2034         return ret;
2035 }
2036
2037 static int
2038 foreach_evsel_in_last_glob(struct evlist *evlist,
2039                            int (*func)(struct evsel *evsel,
2040                                        const void *arg),
2041                            const void *arg)
2042 {
2043         struct evsel *last = NULL;
2044         int err;
2045
2046         /*
2047          * Don't return when list_empty, give func a chance to report
2048          * error when it found last == NULL.
2049          *
2050          * So no need to WARN here, let *func do this.
2051          */
2052         if (evlist->core.nr_entries > 0)
2053                 last = perf_evlist__last(evlist);
2054
2055         do {
2056                 err = (*func)(last, arg);
2057                 if (err)
2058                         return -1;
2059                 if (!last)
2060                         return 0;
2061
2062                 if (last->core.node.prev == &evlist->core.entries)
2063                         return 0;
2064                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2065         } while (!last->cmdline_group_boundary);
2066
2067         return 0;
2068 }
2069
2070 static int set_filter(struct evsel *evsel, const void *arg)
2071 {
2072         const char *str = arg;
2073         bool found = false;
2074         int nr_addr_filters = 0;
2075         struct perf_pmu *pmu = NULL;
2076
2077         if (evsel == NULL) {
2078                 fprintf(stderr,
2079                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2080                 return -1;
2081         }
2082
2083         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2084                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2085                         fprintf(stderr,
2086                                 "not enough memory to hold filter string\n");
2087                         return -1;
2088                 }
2089
2090                 return 0;
2091         }
2092
2093         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2094                 if (pmu->type == evsel->core.attr.type) {
2095                         found = true;
2096                         break;
2097                 }
2098
2099         if (found)
2100                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2101                                     "%d", &nr_addr_filters);
2102
2103         if (!nr_addr_filters) {
2104                 fprintf(stderr,
2105                         "This CPU does not support address filtering\n");
2106                 return -1;
2107         }
2108
2109         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2110                 fprintf(stderr,
2111                         "not enough memory to hold filter string\n");
2112                 return -1;
2113         }
2114
2115         return 0;
2116 }
2117
2118 int parse_filter(const struct option *opt, const char *str,
2119                  int unset __maybe_unused)
2120 {
2121         struct evlist *evlist = *(struct evlist **)opt->value;
2122
2123         return foreach_evsel_in_last_glob(evlist, set_filter,
2124                                           (const void *)str);
2125 }
2126
2127 static int add_exclude_perf_filter(struct evsel *evsel,
2128                                    const void *arg __maybe_unused)
2129 {
2130         char new_filter[64];
2131
2132         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2133                 fprintf(stderr,
2134                         "--exclude-perf option should follow a -e tracepoint option\n");
2135                 return -1;
2136         }
2137
2138         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2139
2140         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2141                 fprintf(stderr,
2142                         "not enough memory to hold filter string\n");
2143                 return -1;
2144         }
2145
2146         return 0;
2147 }
2148
2149 int exclude_perf(const struct option *opt,
2150                  const char *arg __maybe_unused,
2151                  int unset __maybe_unused)
2152 {
2153         struct evlist *evlist = *(struct evlist **)opt->value;
2154
2155         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2156                                           NULL);
2157 }
2158
2159 static const char * const event_type_descriptors[] = {
2160         "Hardware event",
2161         "Software event",
2162         "Tracepoint event",
2163         "Hardware cache event",
2164         "Raw hardware event descriptor",
2165         "Hardware breakpoint",
2166 };
2167
2168 static int cmp_string(const void *a, const void *b)
2169 {
2170         const char * const *as = a;
2171         const char * const *bs = b;
2172
2173         return strcmp(*as, *bs);
2174 }
2175
2176 /*
2177  * Print the events from <debugfs_mount_point>/tracing/events
2178  */
2179
2180 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2181                              bool name_only)
2182 {
2183         DIR *sys_dir, *evt_dir;
2184         struct dirent *sys_dirent, *evt_dirent;
2185         char evt_path[MAXPATHLEN];
2186         char *dir_path;
2187         char **evt_list = NULL;
2188         unsigned int evt_i = 0, evt_num = 0;
2189         bool evt_num_known = false;
2190
2191 restart:
2192         sys_dir = tracing_events__opendir();
2193         if (!sys_dir)
2194                 return;
2195
2196         if (evt_num_known) {
2197                 evt_list = zalloc(sizeof(char *) * evt_num);
2198                 if (!evt_list)
2199                         goto out_close_sys_dir;
2200         }
2201
2202         for_each_subsystem(sys_dir, sys_dirent) {
2203                 if (subsys_glob != NULL &&
2204                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2205                         continue;
2206
2207                 dir_path = get_events_file(sys_dirent->d_name);
2208                 if (!dir_path)
2209                         continue;
2210                 evt_dir = opendir(dir_path);
2211                 if (!evt_dir)
2212                         goto next;
2213
2214                 for_each_event(dir_path, evt_dir, evt_dirent) {
2215                         if (event_glob != NULL &&
2216                             !strglobmatch(evt_dirent->d_name, event_glob))
2217                                 continue;
2218
2219                         if (!evt_num_known) {
2220                                 evt_num++;
2221                                 continue;
2222                         }
2223
2224                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2225                                  sys_dirent->d_name, evt_dirent->d_name);
2226
2227                         evt_list[evt_i] = strdup(evt_path);
2228                         if (evt_list[evt_i] == NULL) {
2229                                 put_events_file(dir_path);
2230                                 goto out_close_evt_dir;
2231                         }
2232                         evt_i++;
2233                 }
2234                 closedir(evt_dir);
2235 next:
2236                 put_events_file(dir_path);
2237         }
2238         closedir(sys_dir);
2239
2240         if (!evt_num_known) {
2241                 evt_num_known = true;
2242                 goto restart;
2243         }
2244         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2245         evt_i = 0;
2246         while (evt_i < evt_num) {
2247                 if (name_only) {
2248                         printf("%s ", evt_list[evt_i++]);
2249                         continue;
2250                 }
2251                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2252                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2253         }
2254         if (evt_num && pager_in_use())
2255                 printf("\n");
2256
2257 out_free:
2258         evt_num = evt_i;
2259         for (evt_i = 0; evt_i < evt_num; evt_i++)
2260                 zfree(&evt_list[evt_i]);
2261         zfree(&evt_list);
2262         return;
2263
2264 out_close_evt_dir:
2265         closedir(evt_dir);
2266 out_close_sys_dir:
2267         closedir(sys_dir);
2268
2269         printf("FATAL: not enough memory to print %s\n",
2270                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2271         if (evt_list)
2272                 goto out_free;
2273 }
2274
2275 /*
2276  * Check whether event is in <debugfs_mount_point>/tracing/events
2277  */
2278
2279 int is_valid_tracepoint(const char *event_string)
2280 {
2281         DIR *sys_dir, *evt_dir;
2282         struct dirent *sys_dirent, *evt_dirent;
2283         char evt_path[MAXPATHLEN];
2284         char *dir_path;
2285
2286         sys_dir = tracing_events__opendir();
2287         if (!sys_dir)
2288                 return 0;
2289
2290         for_each_subsystem(sys_dir, sys_dirent) {
2291                 dir_path = get_events_file(sys_dirent->d_name);
2292                 if (!dir_path)
2293                         continue;
2294                 evt_dir = opendir(dir_path);
2295                 if (!evt_dir)
2296                         goto next;
2297
2298                 for_each_event(dir_path, evt_dir, evt_dirent) {
2299                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2300                                  sys_dirent->d_name, evt_dirent->d_name);
2301                         if (!strcmp(evt_path, event_string)) {
2302                                 closedir(evt_dir);
2303                                 closedir(sys_dir);
2304                                 return 1;
2305                         }
2306                 }
2307                 closedir(evt_dir);
2308 next:
2309                 put_events_file(dir_path);
2310         }
2311         closedir(sys_dir);
2312         return 0;
2313 }
2314
2315 static bool is_event_supported(u8 type, unsigned config)
2316 {
2317         bool ret = true;
2318         int open_return;
2319         struct evsel *evsel;
2320         struct perf_event_attr attr = {
2321                 .type = type,
2322                 .config = config,
2323                 .disabled = 1,
2324         };
2325         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2326
2327         if (tmap == NULL)
2328                 return false;
2329
2330         evsel = evsel__new(&attr);
2331         if (evsel) {
2332                 open_return = evsel__open(evsel, NULL, tmap);
2333                 ret = open_return >= 0;
2334
2335                 if (open_return == -EACCES) {
2336                         /*
2337                          * This happens if the paranoid value
2338                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2339                          * Re-run with exclude_kernel set; we don't do that
2340                          * by default as some ARM machines do not support it.
2341                          *
2342                          */
2343                         evsel->core.attr.exclude_kernel = 1;
2344                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2345                 }
2346                 evsel__delete(evsel);
2347         }
2348
2349         perf_thread_map__put(tmap);
2350         return ret;
2351 }
2352
2353 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2354                       bool name_only)
2355 {
2356         struct probe_cache *pcache;
2357         struct probe_cache_entry *ent;
2358         struct strlist *bidlist, *sdtlist;
2359         struct strlist_config cfg = {.dont_dupstr = true};
2360         struct str_node *nd, *nd2;
2361         char *buf, *path, *ptr = NULL;
2362         bool show_detail = false;
2363         int ret;
2364
2365         sdtlist = strlist__new(NULL, &cfg);
2366         if (!sdtlist) {
2367                 pr_debug("Failed to allocate new strlist for SDT\n");
2368                 return;
2369         }
2370         bidlist = build_id_cache__list_all(true);
2371         if (!bidlist) {
2372                 pr_debug("Failed to get buildids: %d\n", errno);
2373                 return;
2374         }
2375         strlist__for_each_entry(nd, bidlist) {
2376                 pcache = probe_cache__new(nd->s, NULL);
2377                 if (!pcache)
2378                         continue;
2379                 list_for_each_entry(ent, &pcache->entries, node) {
2380                         if (!ent->sdt)
2381                                 continue;
2382                         if (subsys_glob &&
2383                             !strglobmatch(ent->pev.group, subsys_glob))
2384                                 continue;
2385                         if (event_glob &&
2386                             !strglobmatch(ent->pev.event, event_glob))
2387                                 continue;
2388                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2389                                         ent->pev.event, nd->s);
2390                         if (ret > 0)
2391                                 strlist__add(sdtlist, buf);
2392                 }
2393                 probe_cache__delete(pcache);
2394         }
2395         strlist__delete(bidlist);
2396
2397         strlist__for_each_entry(nd, sdtlist) {
2398                 buf = strchr(nd->s, '@');
2399                 if (buf)
2400                         *(buf++) = '\0';
2401                 if (name_only) {
2402                         printf("%s ", nd->s);
2403                         continue;
2404                 }
2405                 nd2 = strlist__next(nd);
2406                 if (nd2) {
2407                         ptr = strchr(nd2->s, '@');
2408                         if (ptr)
2409                                 *ptr = '\0';
2410                         if (strcmp(nd->s, nd2->s) == 0)
2411                                 show_detail = true;
2412                 }
2413                 if (show_detail) {
2414                         path = build_id_cache__origname(buf);
2415                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2416                         if (ret > 0) {
2417                                 printf("  %-50s [%s]\n", buf, "SDT event");
2418                                 free(buf);
2419                         }
2420                         free(path);
2421                 } else
2422                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2423                 if (nd2) {
2424                         if (strcmp(nd->s, nd2->s) != 0)
2425                                 show_detail = false;
2426                         if (ptr)
2427                                 *ptr = '@';
2428                 }
2429         }
2430         strlist__delete(sdtlist);
2431 }
2432
2433 int print_hwcache_events(const char *event_glob, bool name_only)
2434 {
2435         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2436         char name[64];
2437         char **evt_list = NULL;
2438         bool evt_num_known = false;
2439
2440 restart:
2441         if (evt_num_known) {
2442                 evt_list = zalloc(sizeof(char *) * evt_num);
2443                 if (!evt_list)
2444                         goto out_enomem;
2445         }
2446
2447         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2448                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2449                         /* skip invalid cache type */
2450                         if (!perf_evsel__is_cache_op_valid(type, op))
2451                                 continue;
2452
2453                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2454                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2455                                                                         name, sizeof(name));
2456                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2457                                         continue;
2458
2459                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2460                                                         type | (op << 8) | (i << 16)))
2461                                         continue;
2462
2463                                 if (!evt_num_known) {
2464                                         evt_num++;
2465                                         continue;
2466                                 }
2467
2468                                 evt_list[evt_i] = strdup(name);
2469                                 if (evt_list[evt_i] == NULL)
2470                                         goto out_enomem;
2471                                 evt_i++;
2472                         }
2473                 }
2474         }
2475
2476         if (!evt_num_known) {
2477                 evt_num_known = true;
2478                 goto restart;
2479         }
2480         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2481         evt_i = 0;
2482         while (evt_i < evt_num) {
2483                 if (name_only) {
2484                         printf("%s ", evt_list[evt_i++]);
2485                         continue;
2486                 }
2487                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2488                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2489         }
2490         if (evt_num && pager_in_use())
2491                 printf("\n");
2492
2493 out_free:
2494         evt_num = evt_i;
2495         for (evt_i = 0; evt_i < evt_num; evt_i++)
2496                 zfree(&evt_list[evt_i]);
2497         zfree(&evt_list);
2498         return evt_num;
2499
2500 out_enomem:
2501         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2502         if (evt_list)
2503                 goto out_free;
2504         return evt_num;
2505 }
2506
2507 static void print_tool_event(const char *name, const char *event_glob,
2508                              bool name_only)
2509 {
2510         if (event_glob && !strglobmatch(name, event_glob))
2511                 return;
2512         if (name_only)
2513                 printf("%s ", name);
2514         else
2515                 printf("  %-50s [%s]\n", name, "Tool event");
2516
2517 }
2518
2519 void print_tool_events(const char *event_glob, bool name_only)
2520 {
2521         print_tool_event("duration_time", event_glob, name_only);
2522         if (pager_in_use())
2523                 printf("\n");
2524 }
2525
2526 void print_symbol_events(const char *event_glob, unsigned type,
2527                                 struct event_symbol *syms, unsigned max,
2528                                 bool name_only)
2529 {
2530         unsigned int i, evt_i = 0, evt_num = 0;
2531         char name[MAX_NAME_LEN];
2532         char **evt_list = NULL;
2533         bool evt_num_known = false;
2534
2535 restart:
2536         if (evt_num_known) {
2537                 evt_list = zalloc(sizeof(char *) * evt_num);
2538                 if (!evt_list)
2539                         goto out_enomem;
2540                 syms -= max;
2541         }
2542
2543         for (i = 0; i < max; i++, syms++) {
2544
2545                 if (event_glob != NULL && syms->symbol != NULL &&
2546                     !(strglobmatch(syms->symbol, event_glob) ||
2547                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2548                         continue;
2549
2550                 if (!is_event_supported(type, i))
2551                         continue;
2552
2553                 if (!evt_num_known) {
2554                         evt_num++;
2555                         continue;
2556                 }
2557
2558                 if (!name_only && strlen(syms->alias))
2559                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2560                 else
2561                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2562
2563                 evt_list[evt_i] = strdup(name);
2564                 if (evt_list[evt_i] == NULL)
2565                         goto out_enomem;
2566                 evt_i++;
2567         }
2568
2569         if (!evt_num_known) {
2570                 evt_num_known = true;
2571                 goto restart;
2572         }
2573         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2574         evt_i = 0;
2575         while (evt_i < evt_num) {
2576                 if (name_only) {
2577                         printf("%s ", evt_list[evt_i++]);
2578                         continue;
2579                 }
2580                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2581         }
2582         if (evt_num && pager_in_use())
2583                 printf("\n");
2584
2585 out_free:
2586         evt_num = evt_i;
2587         for (evt_i = 0; evt_i < evt_num; evt_i++)
2588                 zfree(&evt_list[evt_i]);
2589         zfree(&evt_list);
2590         return;
2591
2592 out_enomem:
2593         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2594         if (evt_list)
2595                 goto out_free;
2596 }
2597
2598 /*
2599  * Print the help text for the event symbols:
2600  */
2601 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2602                         bool long_desc, bool details_flag)
2603 {
2604         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2605                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2606
2607         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2608                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2609         print_tool_events(event_glob, name_only);
2610
2611         print_hwcache_events(event_glob, name_only);
2612
2613         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2614                         details_flag);
2615
2616         if (event_glob != NULL)
2617                 return;
2618
2619         if (!name_only) {
2620                 printf("  %-50s [%s]\n",
2621                        "rNNN",
2622                        event_type_descriptors[PERF_TYPE_RAW]);
2623                 printf("  %-50s [%s]\n",
2624                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2625                        event_type_descriptors[PERF_TYPE_RAW]);
2626                 if (pager_in_use())
2627                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2628
2629                 printf("  %-50s [%s]\n",
2630                        "mem:<addr>[/len][:access]",
2631                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2632                 if (pager_in_use())
2633                         printf("\n");
2634         }
2635
2636         print_tracepoint_events(NULL, NULL, name_only);
2637
2638         print_sdt_events(NULL, NULL, name_only);
2639
2640         metricgroup__print(true, true, NULL, name_only, details_flag);
2641 }
2642
2643 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2644 {
2645         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2646 }
2647
2648 static int new_term(struct parse_events_term **_term,
2649                     struct parse_events_term *temp,
2650                     char *str, u64 num)
2651 {
2652         struct parse_events_term *term;
2653
2654         term = malloc(sizeof(*term));
2655         if (!term)
2656                 return -ENOMEM;
2657
2658         *term = *temp;
2659         INIT_LIST_HEAD(&term->list);
2660         term->weak = false;
2661
2662         switch (term->type_val) {
2663         case PARSE_EVENTS__TERM_TYPE_NUM:
2664                 term->val.num = num;
2665                 break;
2666         case PARSE_EVENTS__TERM_TYPE_STR:
2667                 term->val.str = str;
2668                 break;
2669         default:
2670                 free(term);
2671                 return -EINVAL;
2672         }
2673
2674         *_term = term;
2675         return 0;
2676 }
2677
2678 int parse_events_term__num(struct parse_events_term **term,
2679                            int type_term, char *config, u64 num,
2680                            bool no_value,
2681                            void *loc_term_, void *loc_val_)
2682 {
2683         YYLTYPE *loc_term = loc_term_;
2684         YYLTYPE *loc_val = loc_val_;
2685
2686         struct parse_events_term temp = {
2687                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2688                 .type_term = type_term,
2689                 .config    = config,
2690                 .no_value  = no_value,
2691                 .err_term  = loc_term ? loc_term->first_column : 0,
2692                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2693         };
2694
2695         return new_term(term, &temp, NULL, num);
2696 }
2697
2698 int parse_events_term__str(struct parse_events_term **term,
2699                            int type_term, char *config, char *str,
2700                            void *loc_term_, void *loc_val_)
2701 {
2702         YYLTYPE *loc_term = loc_term_;
2703         YYLTYPE *loc_val = loc_val_;
2704
2705         struct parse_events_term temp = {
2706                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2707                 .type_term = type_term,
2708                 .config    = config,
2709                 .err_term  = loc_term ? loc_term->first_column : 0,
2710                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2711         };
2712
2713         return new_term(term, &temp, str, 0);
2714 }
2715
2716 int parse_events_term__sym_hw(struct parse_events_term **term,
2717                               char *config, unsigned idx)
2718 {
2719         struct event_symbol *sym;
2720         struct parse_events_term temp = {
2721                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2722                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2723                 .config    = config ?: (char *) "event",
2724         };
2725
2726         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2727         sym = &event_symbols_hw[idx];
2728
2729         return new_term(term, &temp, (char *) sym->symbol, 0);
2730 }
2731
2732 int parse_events_term__clone(struct parse_events_term **new,
2733                              struct parse_events_term *term)
2734 {
2735         struct parse_events_term temp = {
2736                 .type_val  = term->type_val,
2737                 .type_term = term->type_term,
2738                 .config    = term->config,
2739                 .err_term  = term->err_term,
2740                 .err_val   = term->err_val,
2741         };
2742
2743         return new_term(new, &temp, term->val.str, term->val.num);
2744 }
2745
2746 int parse_events_copy_term_list(struct list_head *old,
2747                                  struct list_head **new)
2748 {
2749         struct parse_events_term *term, *n;
2750         int ret;
2751
2752         if (!old) {
2753                 *new = NULL;
2754                 return 0;
2755         }
2756
2757         *new = malloc(sizeof(struct list_head));
2758         if (!*new)
2759                 return -ENOMEM;
2760         INIT_LIST_HEAD(*new);
2761
2762         list_for_each_entry (term, old, list) {
2763                 ret = parse_events_term__clone(&n, term);
2764                 if (ret)
2765                         return ret;
2766                 list_add_tail(&n->list, *new);
2767         }
2768         return 0;
2769 }
2770
2771 void parse_events_terms__purge(struct list_head *terms)
2772 {
2773         struct parse_events_term *term, *h;
2774
2775         list_for_each_entry_safe(term, h, terms, list) {
2776                 if (term->array.nr_ranges)
2777                         zfree(&term->array.ranges);
2778                 list_del_init(&term->list);
2779                 free(term);
2780         }
2781 }
2782
2783 void parse_events_terms__delete(struct list_head *terms)
2784 {
2785         if (!terms)
2786                 return;
2787         parse_events_terms__purge(terms);
2788         free(terms);
2789 }
2790
2791 void parse_events__clear_array(struct parse_events_array *a)
2792 {
2793         zfree(&a->ranges);
2794 }
2795
2796 void parse_events_evlist_error(struct parse_events_state *parse_state,
2797                                int idx, const char *str)
2798 {
2799         struct parse_events_error *err = parse_state->error;
2800
2801         if (!err)
2802                 return;
2803         err->idx = idx;
2804         err->str = strdup(str);
2805         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2806 }
2807
2808 static void config_terms_list(char *buf, size_t buf_sz)
2809 {
2810         int i;
2811         bool first = true;
2812
2813         buf[0] = '\0';
2814         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2815                 const char *name = config_term_names[i];
2816
2817                 if (!config_term_avail(i, NULL))
2818                         continue;
2819                 if (!name)
2820                         continue;
2821                 if (name[0] == '<')
2822                         continue;
2823
2824                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2825                         return;
2826
2827                 if (!first)
2828                         strcat(buf, ",");
2829                 else
2830                         first = false;
2831                 strcat(buf, name);
2832         }
2833 }
2834
2835 /*
2836  * Return string contains valid config terms of an event.
2837  * @additional_terms: For terms such as PMU sysfs terms.
2838  */
2839 char *parse_events_formats_error_string(char *additional_terms)
2840 {
2841         char *str;
2842         /* "no-overwrite" is the longest name */
2843         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2844                           (sizeof("no-overwrite") - 1)];
2845
2846         config_terms_list(static_terms, sizeof(static_terms));
2847         /* valid terms */
2848         if (additional_terms) {
2849                 if (asprintf(&str, "valid terms: %s,%s",
2850                              additional_terms, static_terms) < 0)
2851                         goto fail;
2852         } else {
2853                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2854                         goto fail;
2855         }
2856         return str;
2857
2858 fail:
2859         return NULL;
2860 }