tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE int
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "probe-file.h"
  34 #include "asm/bug.h"
  35 #include "util/parse-branch-options.h"
  36 #include "metricgroup.h"
  37 #include "util/evsel_config.h"
  38 #include "util/event.h"
  39
  40 #define MAX_NAME_LEN 100
  41
  42 #ifdef PARSER_DEBUG
  43 extern int parse_events_debug;
  44 #endif
  45 int parse_events_parse(void *parse_state, void *scanner);
  46 static int get_config_terms(struct list_head *head_config,
  47                             struct list_head *head_terms __maybe_unused);
  48
  49 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  50 /*
  51  * The variable indicates the number of supported pmu event symbols.
  52  * 0 means not initialized and ready to init
  53  * -1 means failed to init, don't try anymore
  54  * >0 is the number of supported pmu event symbols
  55  */
  56 static int perf_pmu_events_list_num;
  57
  58 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  59         [PERF_COUNT_HW_CPU_CYCLES] = {
  60                 .symbol = "cpu-cycles",
  61                 .alias  = "cycles",
  62         },
  63         [PERF_COUNT_HW_INSTRUCTIONS] = {
  64                 .symbol = "instructions",
  65                 .alias  = "",
  66         },
  67         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  68                 .symbol = "cache-references",
  69                 .alias  = "",
  70         },
  71         [PERF_COUNT_HW_CACHE_MISSES] = {
  72                 .symbol = "cache-misses",
  73                 .alias  = "",
  74         },
  75         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  76                 .symbol = "branch-instructions",
  77                 .alias  = "branches",
  78         },
  79         [PERF_COUNT_HW_BRANCH_MISSES] = {
  80                 .symbol = "branch-misses",
  81                 .alias  = "",
  82         },
  83         [PERF_COUNT_HW_BUS_CYCLES] = {
  84                 .symbol = "bus-cycles",
  85                 .alias  = "",
  86         },
  87         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  88                 .symbol = "stalled-cycles-frontend",
  89                 .alias  = "idle-cycles-frontend",
  90         },
  91         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  92                 .symbol = "stalled-cycles-backend",
  93                 .alias  = "idle-cycles-backend",
  94         },
  95         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  96                 .symbol = "ref-cycles",
  97                 .alias  = "",
  98         },
  99 };
 100
 101 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 102         [PERF_COUNT_SW_CPU_CLOCK] = {
 103                 .symbol = "cpu-clock",
 104                 .alias  = "",
 105         },
 106         [PERF_COUNT_SW_TASK_CLOCK] = {
 107                 .symbol = "task-clock",
 108                 .alias  = "",
 109         },
 110         [PERF_COUNT_SW_PAGE_FAULTS] = {
 111                 .symbol = "page-faults",
 112                 .alias  = "faults",
 113         },
 114         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 115                 .symbol = "context-switches",
 116                 .alias  = "cs",
 117         },
 118         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 119                 .symbol = "cpu-migrations",
 120                 .alias  = "migrations",
 121         },
 122         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 123                 .symbol = "minor-faults",
 124                 .alias  = "",
 125         },
 126         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 127                 .symbol = "major-faults",
 128                 .alias  = "",
 129         },
 130         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 131                 .symbol = "alignment-faults",
 132                 .alias  = "",
 133         },
 134         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 135                 .symbol = "emulation-faults",
 136                 .alias  = "",
 137         },
 138         [PERF_COUNT_SW_DUMMY] = {
 139                 .symbol = "dummy",
 140                 .alias  = "",
 141         },
 142         [PERF_COUNT_SW_BPF_OUTPUT] = {
 143                 .symbol = "bpf-output",
 144                 .alias  = "",
 145         },
 146 };
 147
 148 #define __PERF_EVENT_FIELD(config, name) \
 149         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 150
 151 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 152 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 153 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 154 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 155
 156 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 157         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 158                 if (sys_dirent->d_type == DT_DIR &&             \
 159                     (strcmp(sys_dirent->d_name, ".")) &&        \
 160                     (strcmp(sys_dirent->d_name, "..")))
 161
 162 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 163 {
 164         char evt_path[MAXPATHLEN];
 165         int fd;
 166
 167         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 168         fd = open(evt_path, O_RDONLY);
 169         if (fd < 0)
 170                 return -EINVAL;
 171         close(fd);
 172
 173         return 0;
 174 }
 175
 176 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 177         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 178                 if (evt_dirent->d_type == DT_DIR &&             \
 179                     (strcmp(evt_dirent->d_name, ".")) &&        \
 180                     (strcmp(evt_dirent->d_name, "..")) &&       \
 181                     (!tp_event_has_id(dir_path, evt_dirent)))
 182
 183 #define MAX_EVENT_LENGTH 512
 184
 185
 186 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 187 {
 188         struct tracepoint_path *path = NULL;
 189         DIR *sys_dir, *evt_dir;
 190         struct dirent *sys_dirent, *evt_dirent;
 191         char id_buf[24];
 192         int fd;
 193         u64 id;
 194         char evt_path[MAXPATHLEN];
 195         char *dir_path;
 196
 197         sys_dir = tracing_events__opendir();
 198         if (!sys_dir)
 199                 return NULL;
 200
 201         for_each_subsystem(sys_dir, sys_dirent) {
 202                 dir_path = get_events_file(sys_dirent->d_name);
 203                 if (!dir_path)
 204                         continue;
 205                 evt_dir = opendir(dir_path);
 206                 if (!evt_dir)
 207                         goto next;
 208
 209                 for_each_event(dir_path, evt_dir, evt_dirent) {
 210
 211                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 212                                   evt_dirent->d_name);
 213                         fd = open(evt_path, O_RDONLY);
 214                         if (fd < 0)
 215                                 continue;
 216                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 217                                 close(fd);
 218                                 continue;
 219                         }
 220                         close(fd);
 221                         id = atoll(id_buf);
 222                         if (id == config) {
 223                                 put_events_file(dir_path);
 224                                 closedir(evt_dir);
 225                                 closedir(sys_dir);
 226                                 path = zalloc(sizeof(*path));
 227                                 if (!path)
 228                                         return NULL;
 229                                 path->system = malloc(MAX_EVENT_LENGTH);
 230                                 if (!path->system) {
 231                                         free(path);
 232                                         return NULL;
 233                                 }
 234                                 path->name = malloc(MAX_EVENT_LENGTH);
 235                                 if (!path->name) {
 236                                         zfree(&path->system);
 237                                         free(path);
 238                                         return NULL;
 239                                 }
 240                                 strncpy(path->system, sys_dirent->d_name,
 241                                         MAX_EVENT_LENGTH);
 242                                 strncpy(path->name, evt_dirent->d_name,
 243                                         MAX_EVENT_LENGTH);
 244                                 return path;
 245                         }
 246                 }
 247                 closedir(evt_dir);
 248 next:
 249                 put_events_file(dir_path);
 250         }
 251
 252         closedir(sys_dir);
 253         return NULL;
 254 }
 255
 256 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 257 {
 258         struct tracepoint_path *path = zalloc(sizeof(*path));
 259         char *str = strchr(name, ':');
 260
 261         if (path == NULL || str == NULL) {
 262                 free(path);
 263                 return NULL;
 264         }
 265
 266         path->system = strndup(name, str - name);
 267         path->name = strdup(str+1);
 268
 269         if (path->system == NULL || path->name == NULL) {
 270                 zfree(&path->system);
 271                 zfree(&path->name);
 272                 zfree(&path);
 273         }
 274
 275         return path;
 276 }
 277
 278 const char *event_type(int type)
 279 {
 280         switch (type) {
 281         case PERF_TYPE_HARDWARE:
 282                 return "hardware";
 283
 284         case PERF_TYPE_SOFTWARE:
 285                 return "software";
 286
 287         case PERF_TYPE_TRACEPOINT:
 288                 return "tracepoint";
 289
 290         case PERF_TYPE_HW_CACHE:
 291                 return "hardware-cache";
 292
 293         default:
 294                 break;
 295         }
 296
 297         return "unknown";
 298 }
 299
 300 static int parse_events__is_name_term(struct parse_events_term *term)
 301 {
 302         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 303 }
 304
 305 static char *get_config_name(struct list_head *head_terms)
 306 {
 307         struct parse_events_term *term;
 308
 309         if (!head_terms)
 310                 return NULL;
 311
 312         list_for_each_entry(term, head_terms, list)
 313                 if (parse_events__is_name_term(term))
 314                         return term->val.str;
 315
 316         return NULL;
 317 }
 318
 319 static struct evsel *
 320 __add_event(struct list_head *list, int *idx,
 321             struct perf_event_attr *attr,
 322             char *name, struct perf_pmu *pmu,
 323             struct list_head *config_terms, bool auto_merge_stats,
 324             const char *cpu_list)
 325 {
 326         struct evsel *evsel;
 327         struct perf_cpu_map *cpus = pmu ? pmu->cpus :
 328                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 329
 330         event_attr_init(attr);
 331
 332         evsel = perf_evsel__new_idx(attr, *idx);
 333         if (!evsel)
 334                 return NULL;
 335
 336         (*idx)++;
 337         evsel->core.cpus   = perf_cpu_map__get(cpus);
 338         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 339         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 340         evsel->auto_merge_stats = auto_merge_stats;
 341
 342         if (name)
 343                 evsel->name = strdup(name);
 344
 345         if (config_terms)
 346                 list_splice(config_terms, &evsel->config_terms);
 347
 348         list_add_tail(&evsel->core.node, list);
 349         return evsel;
 350 }
 351
 352 static int add_event(struct list_head *list, int *idx,
 353                      struct perf_event_attr *attr, char *name,
 354                      struct list_head *config_terms)
 355 {
 356         return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM;
 357 }
 358
 359 static int add_event_tool(struct list_head *list, int *idx,
 360                           enum perf_tool_event tool_event)
 361 {
 362         struct evsel *evsel;
 363         struct perf_event_attr attr = {
 364                 .type = PERF_TYPE_SOFTWARE,
 365                 .config = PERF_COUNT_SW_DUMMY,
 366         };
 367
 368         evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0");
 369         if (!evsel)
 370                 return -ENOMEM;
 371         evsel->tool_event = tool_event;
 372         if (tool_event == PERF_TOOL_DURATION_TIME)
 373                 evsel->unit = strdup("ns");
 374         return 0;
 375 }
 376
 377 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 378 {
 379         int i, j;
 380         int n, longest = -1;
 381
 382         for (i = 0; i < size; i++) {
 383                 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 384                         n = strlen(names[i][j]);
 385                         if (n > longest && !strncasecmp(str, names[i][j], n))
 386                                 longest = n;
 387                 }
 388                 if (longest > 0)
 389                         return i;
 390         }
 391
 392         return -1;
 393 }
 394
 395 typedef int config_term_func_t(struct perf_event_attr *attr,
 396                                struct parse_events_term *term,
 397                                struct parse_events_error *err);
 398 static int config_term_common(struct perf_event_attr *attr,
 399                               struct parse_events_term *term,
 400                               struct parse_events_error *err);
 401 static int config_attr(struct perf_event_attr *attr,
 402                        struct list_head *head,
 403                        struct parse_events_error *err,
 404                        config_term_func_t config_term);
 405
 406 int parse_events_add_cache(struct list_head *list, int *idx,
 407                            char *type, char *op_result1, char *op_result2,
 408                            struct parse_events_error *err,
 409                            struct list_head *head_config)
 410 {
 411         struct perf_event_attr attr;
 412         LIST_HEAD(config_terms);
 413         char name[MAX_NAME_LEN], *config_name;
 414         int cache_type = -1, cache_op = -1, cache_result = -1;
 415         char *op_result[2] = { op_result1, op_result2 };
 416         int i, n;
 417
 418         /*
 419          * No fallback - if we cannot get a clear cache type
 420          * then bail out:
 421          */
 422         cache_type = parse_aliases(type, perf_evsel__hw_cache,
 423                                    PERF_COUNT_HW_CACHE_MAX);
 424         if (cache_type == -1)
 425                 return -EINVAL;
 426
 427         config_name = get_config_name(head_config);
 428         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 429
 430         for (i = 0; (i < 2) && (op_result[i]); i++) {
 431                 char *str = op_result[i];
 432
 433                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 434
 435                 if (cache_op == -1) {
 436                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 437                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 438                         if (cache_op >= 0) {
 439                                 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 440                                         return -EINVAL;
 441                                 continue;
 442                         }
 443                 }
 444
 445                 if (cache_result == -1) {
 446                         cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 447                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 448                         if (cache_result >= 0)
 449                                 continue;
 450                 }
 451         }
 452
 453         /*
 454          * Fall back to reads:
 455          */
 456         if (cache_op == -1)
 457                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 458
 459         /*
 460          * Fall back to accesses:
 461          */
 462         if (cache_result == -1)
 463                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 464
 465         memset(&attr, 0, sizeof(attr));
 466         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 467         attr.type = PERF_TYPE_HW_CACHE;
 468
 469         if (head_config) {
 470                 if (config_attr(&attr, head_config, err,
 471                                 config_term_common))
 472                         return -EINVAL;
 473
 474                 if (get_config_terms(head_config, &config_terms))
 475                         return -ENOMEM;
 476         }
 477         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 478 }
 479
 480 static void tracepoint_error(struct parse_events_error *e, int err,
 481                              const char *sys, const char *name)
 482 {
 483         char help[BUFSIZ];
 484
 485         if (!e)
 486                 return;
 487
 488         /*
 489          * We get error directly from syscall errno ( > 0),
 490          * or from encoded pointer's error ( < 0).
 491          */
 492         err = abs(err);
 493
 494         switch (err) {
 495         case EACCES:
 496                 e->str = strdup("can't access trace events");
 497                 break;
 498         case ENOENT:
 499                 e->str = strdup("unknown tracepoint");
 500                 break;
 501         default:
 502                 e->str = strdup("failed to add tracepoint");
 503                 break;
 504         }
 505
 506         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 507         e->help = strdup(help);
 508 }
 509
 510 static int add_tracepoint(struct list_head *list, int *idx,
 511                           const char *sys_name, const char *evt_name,
 512                           struct parse_events_error *err,
 513                           struct list_head *head_config)
 514 {
 515         struct evsel *evsel;
 516
 517         evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 518         if (IS_ERR(evsel)) {
 519                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 520                 return PTR_ERR(evsel);
 521         }
 522
 523         if (head_config) {
 524                 LIST_HEAD(config_terms);
 525
 526                 if (get_config_terms(head_config, &config_terms))
 527                         return -ENOMEM;
 528                 list_splice(&config_terms, &evsel->config_terms);
 529         }
 530
 531         list_add_tail(&evsel->core.node, list);
 532         return 0;
 533 }
 534
 535 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 536                                       const char *sys_name, const char *evt_name,
 537                                       struct parse_events_error *err,
 538                                       struct list_head *head_config)
 539 {
 540         char *evt_path;
 541         struct dirent *evt_ent;
 542         DIR *evt_dir;
 543         int ret = 0, found = 0;
 544
 545         evt_path = get_events_file(sys_name);
 546         if (!evt_path) {
 547                 tracepoint_error(err, errno, sys_name, evt_name);
 548                 return -1;
 549         }
 550         evt_dir = opendir(evt_path);
 551         if (!evt_dir) {
 552                 put_events_file(evt_path);
 553                 tracepoint_error(err, errno, sys_name, evt_name);
 554                 return -1;
 555         }
 556
 557         while (!ret && (evt_ent = readdir(evt_dir))) {
 558                 if (!strcmp(evt_ent->d_name, ".")
 559                     || !strcmp(evt_ent->d_name, "..")
 560                     || !strcmp(evt_ent->d_name, "enable")
 561                     || !strcmp(evt_ent->d_name, "filter"))
 562                         continue;
 563
 564                 if (!strglobmatch(evt_ent->d_name, evt_name))
 565                         continue;
 566
 567                 found++;
 568
 569                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 570                                      err, head_config);
 571         }
 572
 573         if (!found) {
 574                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 575                 ret = -1;
 576         }
 577
 578         put_events_file(evt_path);
 579         closedir(evt_dir);
 580         return ret;
 581 }
 582
 583 static int add_tracepoint_event(struct list_head *list, int *idx,
 584                                 const char *sys_name, const char *evt_name,
 585                                 struct parse_events_error *err,
 586                                 struct list_head *head_config)
 587 {
 588         return strpbrk(evt_name, "*?") ?
 589                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 590                                           err, head_config) :
 591                add_tracepoint(list, idx, sys_name, evt_name,
 592                               err, head_config);
 593 }
 594
 595 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 596                                     const char *sys_name, const char *evt_name,
 597                                     struct parse_events_error *err,
 598                                     struct list_head *head_config)
 599 {
 600         struct dirent *events_ent;
 601         DIR *events_dir;
 602         int ret = 0;
 603
 604         events_dir = tracing_events__opendir();
 605         if (!events_dir) {
 606                 tracepoint_error(err, errno, sys_name, evt_name);
 607                 return -1;
 608         }
 609
 610         while (!ret && (events_ent = readdir(events_dir))) {
 611                 if (!strcmp(events_ent->d_name, ".")
 612                     || !strcmp(events_ent->d_name, "..")
 613                     || !strcmp(events_ent->d_name, "enable")
 614                     || !strcmp(events_ent->d_name, "header_event")
 615                     || !strcmp(events_ent->d_name, "header_page"))
 616                         continue;
 617
 618                 if (!strglobmatch(events_ent->d_name, sys_name))
 619                         continue;
 620
 621                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 622                                            evt_name, err, head_config);
 623         }
 624
 625         closedir(events_dir);
 626         return ret;
 627 }
 628
 629 struct __add_bpf_event_param {
 630         struct parse_events_state *parse_state;
 631         struct list_head *list;
 632         struct list_head *head_config;
 633 };
 634
 635 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 636                          void *_param)
 637 {
 638         LIST_HEAD(new_evsels);
 639         struct __add_bpf_event_param *param = _param;
 640         struct parse_events_state *parse_state = param->parse_state;
 641         struct list_head *list = param->list;
 642         struct evsel *pos;
 643         int err;
 644         /*
 645          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 646          * then don't add the tracepoint, this will be used for something else, like
 647          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 648          *
 649          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 650          */
 651         if (group[0] == '!')
 652                 return 0;
 653
 654         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 655                  group, event, fd);
 656
 657         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 658                                           event, parse_state->error,
 659                                           param->head_config);
 660         if (err) {
 661                 struct evsel *evsel, *tmp;
 662
 663                 pr_debug("Failed to add BPF event %s:%s\n",
 664                          group, event);
 665                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 666                         list_del_init(&evsel->core.node);
 667                         evsel__delete(evsel);
 668                 }
 669                 return err;
 670         }
 671         pr_debug("adding %s:%s\n", group, event);
 672
 673         list_for_each_entry(pos, &new_evsels, core.node) {
 674                 pr_debug("adding %s:%s to %p\n",
 675                          group, event, pos);
 676                 pos->bpf_fd = fd;
 677                 pos->bpf_obj = obj;
 678         }
 679         list_splice(&new_evsels, list);
 680         return 0;
 681 }
 682
 683 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 684                               struct list_head *list,
 685                               struct bpf_object *obj,
 686                               struct list_head *head_config)
 687 {
 688         int err;
 689         char errbuf[BUFSIZ];
 690         struct __add_bpf_event_param param = {parse_state, list, head_config};
 691         static bool registered_unprobe_atexit = false;
 692
 693         if (IS_ERR(obj) || !obj) {
 694                 snprintf(errbuf, sizeof(errbuf),
 695                          "Internal error: load bpf obj with NULL");
 696                 err = -EINVAL;
 697                 goto errout;
 698         }
 699
 700         /*
 701          * Register atexit handler before calling bpf__probe() so
 702          * bpf__probe() don't need to unprobe probe points its already
 703          * created when failure.
 704          */
 705         if (!registered_unprobe_atexit) {
 706                 atexit(bpf__clear);
 707                 registered_unprobe_atexit = true;
 708         }
 709
 710         err = bpf__probe(obj);
 711         if (err) {
 712                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 713                 goto errout;
 714         }
 715
 716         err = bpf__load(obj);
 717         if (err) {
 718                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 719                 goto errout;
 720         }
 721
 722         err = bpf__foreach_event(obj, add_bpf_event, &param);
 723         if (err) {
 724                 snprintf(errbuf, sizeof(errbuf),
 725                          "Attach events in BPF object failed");
 726                 goto errout;
 727         }
 728
 729         return 0;
 730 errout:
 731         parse_state->error->help = strdup("(add -v to see detail)");
 732         parse_state->error->str = strdup(errbuf);
 733         return err;
 734 }
 735
 736 static int
 737 parse_events_config_bpf(struct parse_events_state *parse_state,
 738                         struct bpf_object *obj,
 739                         struct list_head *head_config)
 740 {
 741         struct parse_events_term *term;
 742         int error_pos;
 743
 744         if (!head_config || list_empty(head_config))
 745                 return 0;
 746
 747         list_for_each_entry(term, head_config, list) {
 748                 char errbuf[BUFSIZ];
 749                 int err;
 750
 751                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 752                         snprintf(errbuf, sizeof(errbuf),
 753                                  "Invalid config term for BPF object");
 754                         errbuf[BUFSIZ - 1] = '\0';
 755
 756                         parse_state->error->idx = term->err_term;
 757                         parse_state->error->str = strdup(errbuf);
 758                         return -EINVAL;
 759                 }
 760
 761                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 762                 if (err) {
 763                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 764                                                  &error_pos, err, errbuf,
 765                                                  sizeof(errbuf));
 766                         parse_state->error->help = strdup(
 767 "Hint:\tValid config terms:\n"
 768 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 769 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 770 "\n"
 771 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 772 "     \t(add -v to see detail)");
 773                         parse_state->error->str = strdup(errbuf);
 774                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 775                                 parse_state->error->idx = term->err_val;
 776                         else
 777                                 parse_state->error->idx = term->err_term + error_pos;
 778                         return err;
 779                 }
 780         }
 781         return 0;
 782 }
 783
 784 /*
 785  * Split config terms:
 786  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 787  *  'call-graph=fp' is 'evt config', should be applied to each
 788  *  events in bpf.c.
 789  * 'map:array.value[0]=1' is 'obj config', should be processed
 790  * with parse_events_config_bpf.
 791  *
 792  * Move object config terms from the first list to obj_head_config.
 793  */
 794 static void
 795 split_bpf_config_terms(struct list_head *evt_head_config,
 796                        struct list_head *obj_head_config)
 797 {
 798         struct parse_events_term *term, *temp;
 799
 800         /*
 801          * Currectly, all possible user config term
 802          * belong to bpf object. parse_events__is_hardcoded_term()
 803          * happends to be a good flag.
 804          *
 805          * See parse_events_config_bpf() and
 806          * config_term_tracepoint().
 807          */
 808         list_for_each_entry_safe(term, temp, evt_head_config, list)
 809                 if (!parse_events__is_hardcoded_term(term))
 810                         list_move_tail(&term->list, obj_head_config);
 811 }
 812
 813 int parse_events_load_bpf(struct parse_events_state *parse_state,
 814                           struct list_head *list,
 815                           char *bpf_file_name,
 816                           bool source,
 817                           struct list_head *head_config)
 818 {
 819         int err;
 820         struct bpf_object *obj;
 821         LIST_HEAD(obj_head_config);
 822
 823         if (head_config)
 824                 split_bpf_config_terms(head_config, &obj_head_config);
 825
 826         obj = bpf__prepare_load(bpf_file_name, source);
 827         if (IS_ERR(obj)) {
 828                 char errbuf[BUFSIZ];
 829
 830                 err = PTR_ERR(obj);
 831
 832                 if (err == -ENOTSUP)
 833                         snprintf(errbuf, sizeof(errbuf),
 834                                  "BPF support is not compiled");
 835                 else
 836                         bpf__strerror_prepare_load(bpf_file_name,
 837                                                    source,
 838                                                    -err, errbuf,
 839                                                    sizeof(errbuf));
 840
 841                 parse_state->error->help = strdup("(add -v to see detail)");
 842                 parse_state->error->str = strdup(errbuf);
 843                 return err;
 844         }
 845
 846         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 847         if (err)
 848                 return err;
 849         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 850
 851         /*
 852          * Caller doesn't know anything about obj_head_config,
 853          * so combine them together again before returnning.
 854          */
 855         if (head_config)
 856                 list_splice_tail(&obj_head_config, head_config);
 857         return err;
 858 }
 859
 860 static int
 861 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 862 {
 863         int i;
 864
 865         for (i = 0; i < 3; i++) {
 866                 if (!type || !type[i])
 867                         break;
 868
 869 #define CHECK_SET_TYPE(bit)             \
 870 do {                                    \
 871         if (attr->bp_type & bit)        \
 872                 return -EINVAL;         \
 873         else                            \
 874                 attr->bp_type |= bit;   \
 875 } while (0)
 876
 877                 switch (type[i]) {
 878                 case 'r':
 879                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 880                         break;
 881                 case 'w':
 882                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 883                         break;
 884                 case 'x':
 885                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 886                         break;
 887                 default:
 888                         return -EINVAL;
 889                 }
 890         }
 891
 892 #undef CHECK_SET_TYPE
 893
 894         if (!attr->bp_type) /* Default */
 895                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 896
 897         return 0;
 898 }
 899
 900 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 901                                 void *ptr, char *type, u64 len)
 902 {
 903         struct perf_event_attr attr;
 904
 905         memset(&attr, 0, sizeof(attr));
 906         attr.bp_addr = (unsigned long) ptr;
 907
 908         if (parse_breakpoint_type(type, &attr))
 909                 return -EINVAL;
 910
 911         /* Provide some defaults if len is not specified */
 912         if (!len) {
 913                 if (attr.bp_type == HW_BREAKPOINT_X)
 914                         len = sizeof(long);
 915                 else
 916                         len = HW_BREAKPOINT_LEN_4;
 917         }
 918
 919         attr.bp_len = len;
 920
 921         attr.type = PERF_TYPE_BREAKPOINT;
 922         attr.sample_period = 1;
 923
 924         return add_event(list, idx, &attr, NULL, NULL);
 925 }
 926
 927 static int check_type_val(struct parse_events_term *term,
 928                           struct parse_events_error *err,
 929                           int type)
 930 {
 931         if (type == term->type_val)
 932                 return 0;
 933
 934         if (err) {
 935                 err->idx = term->err_val;
 936                 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 937                         err->str = strdup("expected numeric value");
 938                 else
 939                         err->str = strdup("expected string value");
 940         }
 941         return -EINVAL;
 942 }
 943
 944 /*
 945  * Update according to parse-events.l
 946  */
 947 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 948         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 949         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 950         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 951         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 952         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 953         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 954         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 955         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 956         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 957         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 958         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 959         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 960         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
 961         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
 962         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
 963         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
 964         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
 965         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
 966         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
 967         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
 968 };
 969
 970 static bool config_term_shrinked;
 971
 972 static bool
 973 config_term_avail(int term_type, struct parse_events_error *err)
 974 {
 975         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 976                 err->str = strdup("Invalid term_type");
 977                 return false;
 978         }
 979         if (!config_term_shrinked)
 980                 return true;
 981
 982         switch (term_type) {
 983         case PARSE_EVENTS__TERM_TYPE_CONFIG:
 984         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 985         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 986         case PARSE_EVENTS__TERM_TYPE_NAME:
 987         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 988         case PARSE_EVENTS__TERM_TYPE_PERCORE:
 989                 return true;
 990         default:
 991                 if (!err)
 992                         return false;
 993
 994                 /* term_type is validated so indexing is safe */
 995                 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 996                              config_term_names[term_type]) < 0)
 997                         err->str = NULL;
 998                 return false;
 999         }
1000 }
1001
1002 void parse_events__shrink_config_terms(void)
1003 {
1004         config_term_shrinked = true;
1005 }
1006
1007 static int config_term_common(struct perf_event_attr *attr,
1008                               struct parse_events_term *term,
1009                               struct parse_events_error *err)
1010 {
1011 #define CHECK_TYPE_VAL(type)                                               \
1012 do {                                                                       \
1013         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1014                 return -EINVAL;                                            \
1015 } while (0)
1016
1017         switch (term->type_term) {
1018         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1019                 CHECK_TYPE_VAL(NUM);
1020                 attr->config = term->val.num;
1021                 break;
1022         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1023                 CHECK_TYPE_VAL(NUM);
1024                 attr->config1 = term->val.num;
1025                 break;
1026         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1027                 CHECK_TYPE_VAL(NUM);
1028                 attr->config2 = term->val.num;
1029                 break;
1030         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1031                 CHECK_TYPE_VAL(NUM);
1032                 break;
1033         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1034                 CHECK_TYPE_VAL(NUM);
1035                 break;
1036         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1037                 CHECK_TYPE_VAL(STR);
1038                 if (strcmp(term->val.str, "no") &&
1039                     parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1040                         err->str = strdup("invalid branch sample type");
1041                         err->idx = term->err_val;
1042                         return -EINVAL;
1043                 }
1044                 break;
1045         case PARSE_EVENTS__TERM_TYPE_TIME:
1046                 CHECK_TYPE_VAL(NUM);
1047                 if (term->val.num > 1) {
1048                         err->str = strdup("expected 0 or 1");
1049                         err->idx = term->err_val;
1050                         return -EINVAL;
1051                 }
1052                 break;
1053         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1054                 CHECK_TYPE_VAL(STR);
1055                 break;
1056         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1057                 CHECK_TYPE_VAL(NUM);
1058                 break;
1059         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1060                 CHECK_TYPE_VAL(NUM);
1061                 break;
1062         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1063                 CHECK_TYPE_VAL(NUM);
1064                 break;
1065         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1066                 CHECK_TYPE_VAL(NUM);
1067                 break;
1068         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1069                 CHECK_TYPE_VAL(NUM);
1070                 break;
1071         case PARSE_EVENTS__TERM_TYPE_NAME:
1072                 CHECK_TYPE_VAL(STR);
1073                 break;
1074         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1075                 CHECK_TYPE_VAL(NUM);
1076                 break;
1077         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1078                 CHECK_TYPE_VAL(NUM);
1079                 break;
1080         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1081                 CHECK_TYPE_VAL(NUM);
1082                 if ((unsigned int)term->val.num > 1) {
1083                         err->str = strdup("expected 0 or 1");
1084                         err->idx = term->err_val;
1085                         return -EINVAL;
1086                 }
1087                 break;
1088         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1089                 CHECK_TYPE_VAL(NUM);
1090                 break;
1091         default:
1092                 err->str = strdup("unknown term");
1093                 err->idx = term->err_term;
1094                 err->help = parse_events_formats_error_string(NULL);
1095                 return -EINVAL;
1096         }
1097
1098         /*
1099          * Check term availbility after basic checking so
1100          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1101          *
1102          * If check availbility at the entry of this function,
1103          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1104          * if an invalid config term is provided for legacy events
1105          * (for example, instructions/badterm/...), which is confusing.
1106          */
1107         if (!config_term_avail(term->type_term, err))
1108                 return -EINVAL;
1109         return 0;
1110 #undef CHECK_TYPE_VAL
1111 }
1112
1113 static int config_term_pmu(struct perf_event_attr *attr,
1114                            struct parse_events_term *term,
1115                            struct parse_events_error *err)
1116 {
1117         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1118             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1119                 /*
1120                  * Always succeed for sysfs terms, as we dont know
1121                  * at this point what type they need to have.
1122                  */
1123                 return 0;
1124         else
1125                 return config_term_common(attr, term, err);
1126 }
1127
1128 static int config_term_tracepoint(struct perf_event_attr *attr,
1129                                   struct parse_events_term *term,
1130                                   struct parse_events_error *err)
1131 {
1132         switch (term->type_term) {
1133         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1134         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1135         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1136         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1137         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1138         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1139         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1140         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1141         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1142                 return config_term_common(attr, term, err);
1143         default:
1144                 if (err) {
1145                         err->idx = term->err_term;
1146                         err->str = strdup("unknown term");
1147                         err->help = strdup("valid terms: call-graph,stack-size\n");
1148                 }
1149                 return -EINVAL;
1150         }
1151
1152         return 0;
1153 }
1154
1155 static int config_attr(struct perf_event_attr *attr,
1156                        struct list_head *head,
1157                        struct parse_events_error *err,
1158                        config_term_func_t config_term)
1159 {
1160         struct parse_events_term *term;
1161
1162         list_for_each_entry(term, head, list)
1163                 if (config_term(attr, term, err))
1164                         return -EINVAL;
1165
1166         return 0;
1167 }
1168
1169 static int get_config_terms(struct list_head *head_config,
1170                             struct list_head *head_terms __maybe_unused)
1171 {
1172 #define ADD_CONFIG_TERM(__type, __name, __val)                  \
1173 do {                                                            \
1174         struct perf_evsel_config_term *__t;                     \
1175                                                                 \
1176         __t = zalloc(sizeof(*__t));                             \
1177         if (!__t)                                               \
1178                 return -ENOMEM;                                 \
1179                                                                 \
1180         INIT_LIST_HEAD(&__t->list);                             \
1181         __t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;   \
1182         __t->val.__name = __val;                                \
1183         __t->weak       = term->weak;                           \
1184         list_add_tail(&__t->list, head_terms);                  \
1185 } while (0)
1186
1187         struct parse_events_term *term;
1188
1189         list_for_each_entry(term, head_config, list) {
1190                 switch (term->type_term) {
1191                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1192                         ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1193                         break;
1194                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1195                         ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1196                         break;
1197                 case PARSE_EVENTS__TERM_TYPE_TIME:
1198                         ADD_CONFIG_TERM(TIME, time, term->val.num);
1199                         break;
1200                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1201                         ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1202                         break;
1203                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1204                         ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1205                         break;
1206                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1207                         ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1208                         break;
1209                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1210                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1211                         break;
1212                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1213                         ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1214                         break;
1215                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1216                         ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1217                         break;
1218                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1219                         ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1220                         break;
1221                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1222                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1223                         break;
1224                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1225                         ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1226                         break;
1227                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1228                         ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1229                         break;
1230                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1231                         ADD_CONFIG_TERM(PERCORE, percore,
1232                                         term->val.num ? true : false);
1233                         break;
1234                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1235                         ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
1236                         break;
1237                 default:
1238                         break;
1239                 }
1240         }
1241 #undef ADD_EVSEL_CONFIG
1242         return 0;
1243 }
1244
1245 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1246                                 const char *sys, const char *event,
1247                                 struct parse_events_error *err,
1248                                 struct list_head *head_config)
1249 {
1250         if (head_config) {
1251                 struct perf_event_attr attr;
1252
1253                 if (config_attr(&attr, head_config, err,
1254                                 config_term_tracepoint))
1255                         return -EINVAL;
1256         }
1257
1258         if (strpbrk(sys, "*?"))
1259                 return add_tracepoint_multi_sys(list, idx, sys, event,
1260                                                 err, head_config);
1261         else
1262                 return add_tracepoint_event(list, idx, sys, event,
1263                                             err, head_config);
1264 }
1265
1266 int parse_events_add_numeric(struct parse_events_state *parse_state,
1267                              struct list_head *list,
1268                              u32 type, u64 config,
1269                              struct list_head *head_config)
1270 {
1271         struct perf_event_attr attr;
1272         LIST_HEAD(config_terms);
1273
1274         memset(&attr, 0, sizeof(attr));
1275         attr.type = type;
1276         attr.config = config;
1277
1278         if (head_config) {
1279                 if (config_attr(&attr, head_config, parse_state->error,
1280                                 config_term_common))
1281                         return -EINVAL;
1282
1283                 if (get_config_terms(head_config, &config_terms))
1284                         return -ENOMEM;
1285         }
1286
1287         return add_event(list, &parse_state->idx, &attr,
1288                          get_config_name(head_config), &config_terms);
1289 }
1290
1291 int parse_events_add_tool(struct parse_events_state *parse_state,
1292                           struct list_head *list,
1293                           enum perf_tool_event tool_event)
1294 {
1295         return add_event_tool(list, &parse_state->idx, tool_event);
1296 }
1297
1298 static bool config_term_percore(struct list_head *config_terms)
1299 {
1300         struct perf_evsel_config_term *term;
1301
1302         list_for_each_entry(term, config_terms, list) {
1303                 if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
1304                         return term->val.percore;
1305         }
1306
1307         return false;
1308 }
1309
1310 int parse_events_add_pmu(struct parse_events_state *parse_state,
1311                          struct list_head *list, char *name,
1312                          struct list_head *head_config,
1313                          bool auto_merge_stats,
1314                          bool use_alias)
1315 {
1316         struct perf_event_attr attr;
1317         struct perf_pmu_info info;
1318         struct perf_pmu *pmu;
1319         struct evsel *evsel;
1320         struct parse_events_error *err = parse_state->error;
1321         bool use_uncore_alias;
1322         LIST_HEAD(config_terms);
1323
1324         pmu = perf_pmu__find(name);
1325         if (!pmu) {
1326                 if (asprintf(&err->str,
1327                                 "Cannot find PMU `%s'. Missing kernel support?",
1328                                 name) < 0)
1329                         err->str = NULL;
1330                 return -EINVAL;
1331         }
1332
1333         if (pmu->default_config) {
1334                 memcpy(&attr, pmu->default_config,
1335                        sizeof(struct perf_event_attr));
1336         } else {
1337                 memset(&attr, 0, sizeof(attr));
1338         }
1339
1340         use_uncore_alias = (pmu->is_uncore && use_alias);
1341
1342         if (!head_config) {
1343                 attr.type = pmu->type;
1344                 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1345                                     auto_merge_stats, NULL);
1346                 if (evsel) {
1347                         evsel->pmu_name = name;
1348                         evsel->use_uncore_alias = use_uncore_alias;
1349                         return 0;
1350                 } else {
1351                         return -ENOMEM;
1352                 }
1353         }
1354
1355         if (perf_pmu__check_alias(pmu, head_config, &info))
1356                 return -EINVAL;
1357
1358         /*
1359          * Configure hardcoded terms first, no need to check
1360          * return value when called with fail == 0 ;)
1361          */
1362         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1363                 return -EINVAL;
1364
1365         if (get_config_terms(head_config, &config_terms))
1366                 return -ENOMEM;
1367
1368         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1369                 return -EINVAL;
1370
1371         evsel = __add_event(list, &parse_state->idx, &attr,
1372                             get_config_name(head_config), pmu,
1373                             &config_terms, auto_merge_stats, NULL);
1374         if (evsel) {
1375                 evsel->unit = info.unit;
1376                 evsel->scale = info.scale;
1377                 evsel->per_pkg = info.per_pkg;
1378                 evsel->snapshot = info.snapshot;
1379                 evsel->metric_expr = info.metric_expr;
1380                 evsel->metric_name = info.metric_name;
1381                 evsel->pmu_name = name;
1382                 evsel->use_uncore_alias = use_uncore_alias;
1383                 evsel->percore = config_term_percore(&evsel->config_terms);
1384         }
1385
1386         return evsel ? 0 : -ENOMEM;
1387 }
1388
1389 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1390                                char *str, struct list_head **listp)
1391 {
1392         struct list_head *head;
1393         struct parse_events_term *term;
1394         struct list_head *list;
1395         struct perf_pmu *pmu = NULL;
1396         int ok = 0;
1397
1398         *listp = NULL;
1399         /* Add it for all PMUs that support the alias */
1400         list = malloc(sizeof(struct list_head));
1401         if (!list)
1402                 return -1;
1403         INIT_LIST_HEAD(list);
1404         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1405                 struct perf_pmu_alias *alias;
1406
1407                 list_for_each_entry(alias, &pmu->aliases, list) {
1408                         if (!strcasecmp(alias->name, str)) {
1409                                 head = malloc(sizeof(struct list_head));
1410                                 if (!head)
1411                                         return -1;
1412                                 INIT_LIST_HEAD(head);
1413                                 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1414                                                            str, 1, false, &str, NULL) < 0)
1415                                         return -1;
1416                                 list_add_tail(&term->list, head);
1417
1418                                 if (!parse_events_add_pmu(parse_state, list,
1419                                                           pmu->name, head,
1420                                                           true, true)) {
1421                                         pr_debug("%s -> %s/%s/\n", str,
1422                                                  pmu->name, alias->str);
1423                                         ok++;
1424                                 }
1425
1426                                 parse_events_terms__delete(head);
1427                         }
1428                 }
1429         }
1430         if (!ok)
1431                 return -1;
1432         *listp = list;
1433         return 0;
1434 }
1435
1436 int parse_events__modifier_group(struct list_head *list,
1437                                  char *event_mod)
1438 {
1439         return parse_events__modifier_event(list, event_mod, true);
1440 }
1441
1442 /*
1443  * Check if the two uncore PMUs are from the same uncore block
1444  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1445  */
1446 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1447 {
1448         char *end_a, *end_b;
1449
1450         end_a = strrchr(pmu_name_a, '_');
1451         end_b = strrchr(pmu_name_b, '_');
1452
1453         if (!end_a || !end_b)
1454                 return false;
1455
1456         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1457                 return false;
1458
1459         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1460 }
1461
1462 static int
1463 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1464                                            struct parse_events_state *parse_state)
1465 {
1466         struct evsel *evsel, *leader;
1467         uintptr_t *leaders;
1468         bool is_leader = true;
1469         int i, nr_pmu = 0, total_members, ret = 0;
1470
1471         leader = list_first_entry(list, struct evsel, core.node);
1472         evsel = list_last_entry(list, struct evsel, core.node);
1473         total_members = evsel->idx - leader->idx + 1;
1474
1475         leaders = calloc(total_members, sizeof(uintptr_t));
1476         if (WARN_ON(!leaders))
1477                 return 0;
1478
1479         /*
1480          * Going through the whole group and doing sanity check.
1481          * All members must use alias, and be from the same uncore block.
1482          * Also, storing the leader events in an array.
1483          */
1484         __evlist__for_each_entry(list, evsel) {
1485
1486                 /* Only split the uncore group which members use alias */
1487                 if (!evsel->use_uncore_alias)
1488                         goto out;
1489
1490                 /* The events must be from the same uncore block */
1491                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1492                         goto out;
1493
1494                 if (!is_leader)
1495                         continue;
1496                 /*
1497                  * If the event's PMU name starts to repeat, it must be a new
1498                  * event. That can be used to distinguish the leader from
1499                  * other members, even they have the same event name.
1500                  */
1501                 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1502                         is_leader = false;
1503                         continue;
1504                 }
1505                 /* The name is always alias name */
1506                 WARN_ON(strcmp(leader->name, evsel->name));
1507
1508                 /* Store the leader event for each PMU */
1509                 leaders[nr_pmu++] = (uintptr_t) evsel;
1510         }
1511
1512         /* only one event alias */
1513         if (nr_pmu == total_members) {
1514                 parse_state->nr_groups--;
1515                 goto handled;
1516         }
1517
1518         /*
1519          * An uncore event alias is a joint name which means the same event
1520          * runs on all PMUs of a block.
1521          * Perf doesn't support mixed events from different PMUs in the same
1522          * group. The big group has to be split into multiple small groups
1523          * which only include the events from the same PMU.
1524          *
1525          * Here the uncore event aliases must be from the same uncore block.
1526          * The number of PMUs must be same for each alias. The number of new
1527          * small groups equals to the number of PMUs.
1528          * Setting the leader event for corresponding members in each group.
1529          */
1530         i = 0;
1531         __evlist__for_each_entry(list, evsel) {
1532                 if (i >= nr_pmu)
1533                         i = 0;
1534                 evsel->leader = (struct evsel *) leaders[i++];
1535         }
1536
1537         /* The number of members and group name are same for each group */
1538         for (i = 0; i < nr_pmu; i++) {
1539                 evsel = (struct evsel *) leaders[i];
1540                 evsel->core.nr_members = total_members / nr_pmu;
1541                 evsel->group_name = name ? strdup(name) : NULL;
1542         }
1543
1544         /* Take the new small groups into account */
1545         parse_state->nr_groups += nr_pmu - 1;
1546
1547 handled:
1548         ret = 1;
1549 out:
1550         free(leaders);
1551         return ret;
1552 }
1553
1554 void parse_events__set_leader(char *name, struct list_head *list,
1555                               struct parse_events_state *parse_state)
1556 {
1557         struct evsel *leader;
1558
1559         if (list_empty(list)) {
1560                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1561                 return;
1562         }
1563
1564         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1565                 return;
1566
1567         __perf_evlist__set_leader(list);
1568         leader = list_entry(list->next, struct evsel, core.node);
1569         leader->group_name = name ? strdup(name) : NULL;
1570 }
1571
1572 /* list_event is assumed to point to malloc'ed memory */
1573 void parse_events_update_lists(struct list_head *list_event,
1574                                struct list_head *list_all)
1575 {
1576         /*
1577          * Called for single event definition. Update the
1578          * 'all event' list, and reinit the 'single event'
1579          * list, for next event definition.
1580          */
1581         list_splice_tail(list_event, list_all);
1582         free(list_event);
1583 }
1584
1585 struct event_modifier {
1586         int eu;
1587         int ek;
1588         int eh;
1589         int eH;
1590         int eG;
1591         int eI;
1592         int precise;
1593         int precise_max;
1594         int exclude_GH;
1595         int sample_read;
1596         int pinned;
1597         int weak;
1598 };
1599
1600 static int get_event_modifier(struct event_modifier *mod, char *str,
1601                                struct evsel *evsel)
1602 {
1603         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1604         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1605         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1606         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1607         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1608         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1609         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1610         int precise_max = 0;
1611         int sample_read = 0;
1612         int pinned = evsel ? evsel->core.attr.pinned : 0;
1613
1614         int exclude = eu | ek | eh;
1615         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1616         int weak = 0;
1617
1618         memset(mod, 0, sizeof(*mod));
1619
1620         while (*str) {
1621                 if (*str == 'u') {
1622                         if (!exclude)
1623                                 exclude = eu = ek = eh = 1;
1624                         eu = 0;
1625                 } else if (*str == 'k') {
1626                         if (!exclude)
1627                                 exclude = eu = ek = eh = 1;
1628                         ek = 0;
1629                 } else if (*str == 'h') {
1630                         if (!exclude)
1631                                 exclude = eu = ek = eh = 1;
1632                         eh = 0;
1633                 } else if (*str == 'G') {
1634                         if (!exclude_GH)
1635                                 exclude_GH = eG = eH = 1;
1636                         eG = 0;
1637                 } else if (*str == 'H') {
1638                         if (!exclude_GH)
1639                                 exclude_GH = eG = eH = 1;
1640                         eH = 0;
1641                 } else if (*str == 'I') {
1642                         eI = 1;
1643                 } else if (*str == 'p') {
1644                         precise++;
1645                         /* use of precise requires exclude_guest */
1646                         if (!exclude_GH)
1647                                 eG = 1;
1648                 } else if (*str == 'P') {
1649                         precise_max = 1;
1650                 } else if (*str == 'S') {
1651                         sample_read = 1;
1652                 } else if (*str == 'D') {
1653                         pinned = 1;
1654                 } else if (*str == 'W') {
1655                         weak = 1;
1656                 } else
1657                         break;
1658
1659                 ++str;
1660         }
1661
1662         /*
1663          * precise ip:
1664          *
1665          *  0 - SAMPLE_IP can have arbitrary skid
1666          *  1 - SAMPLE_IP must have constant skid
1667          *  2 - SAMPLE_IP requested to have 0 skid
1668          *  3 - SAMPLE_IP must have 0 skid
1669          *
1670          *  See also PERF_RECORD_MISC_EXACT_IP
1671          */
1672         if (precise > 3)
1673                 return -EINVAL;
1674
1675         mod->eu = eu;
1676         mod->ek = ek;
1677         mod->eh = eh;
1678         mod->eH = eH;
1679         mod->eG = eG;
1680         mod->eI = eI;
1681         mod->precise = precise;
1682         mod->precise_max = precise_max;
1683         mod->exclude_GH = exclude_GH;
1684         mod->sample_read = sample_read;
1685         mod->pinned = pinned;
1686         mod->weak = weak;
1687
1688         return 0;
1689 }
1690
1691 /*
1692  * Basic modifier sanity check to validate it contains only one
1693  * instance of any modifier (apart from 'p') present.
1694  */
1695 static int check_modifier(char *str)
1696 {
1697         char *p = str;
1698
1699         /* The sizeof includes 0 byte as well. */
1700         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1701                 return -1;
1702
1703         while (*p) {
1704                 if (*p != 'p' && strchr(p + 1, *p))
1705                         return -1;
1706                 p++;
1707         }
1708
1709         return 0;
1710 }
1711
1712 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1713 {
1714         struct evsel *evsel;
1715         struct event_modifier mod;
1716
1717         if (str == NULL)
1718                 return 0;
1719
1720         if (check_modifier(str))
1721                 return -EINVAL;
1722
1723         if (!add && get_event_modifier(&mod, str, NULL))
1724                 return -EINVAL;
1725
1726         __evlist__for_each_entry(list, evsel) {
1727                 if (add && get_event_modifier(&mod, str, evsel))
1728                         return -EINVAL;
1729
1730                 evsel->core.attr.exclude_user   = mod.eu;
1731                 evsel->core.attr.exclude_kernel = mod.ek;
1732                 evsel->core.attr.exclude_hv     = mod.eh;
1733                 evsel->core.attr.precise_ip     = mod.precise;
1734                 evsel->core.attr.exclude_host   = mod.eH;
1735                 evsel->core.attr.exclude_guest  = mod.eG;
1736                 evsel->core.attr.exclude_idle   = mod.eI;
1737                 evsel->exclude_GH          = mod.exclude_GH;
1738                 evsel->sample_read         = mod.sample_read;
1739                 evsel->precise_max         = mod.precise_max;
1740                 evsel->weak_group          = mod.weak;
1741
1742                 if (perf_evsel__is_group_leader(evsel))
1743                         evsel->core.attr.pinned = mod.pinned;
1744         }
1745
1746         return 0;
1747 }
1748
1749 int parse_events_name(struct list_head *list, char *name)
1750 {
1751         struct evsel *evsel;
1752
1753         __evlist__for_each_entry(list, evsel) {
1754                 if (!evsel->name)
1755                         evsel->name = strdup(name);
1756         }
1757
1758         return 0;
1759 }
1760
1761 static int
1762 comp_pmu(const void *p1, const void *p2)
1763 {
1764         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1765         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1766
1767         return strcasecmp(pmu1->symbol, pmu2->symbol);
1768 }
1769
1770 static void perf_pmu__parse_cleanup(void)
1771 {
1772         if (perf_pmu_events_list_num > 0) {
1773                 struct perf_pmu_event_symbol *p;
1774                 int i;
1775
1776                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1777                         p = perf_pmu_events_list + i;
1778                         zfree(&p->symbol);
1779                 }
1780                 zfree(&perf_pmu_events_list);
1781                 perf_pmu_events_list_num = 0;
1782         }
1783 }
1784
1785 #define SET_SYMBOL(str, stype)          \
1786 do {                                    \
1787         p->symbol = str;                \
1788         if (!p->symbol)                 \
1789                 goto err;               \
1790         p->type = stype;                \
1791 } while (0)
1792
1793 /*
1794  * Read the pmu events list from sysfs
1795  * Save it into perf_pmu_events_list
1796  */
1797 static void perf_pmu__parse_init(void)
1798 {
1799
1800         struct perf_pmu *pmu = NULL;
1801         struct perf_pmu_alias *alias;
1802         int len = 0;
1803
1804         pmu = NULL;
1805         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1806                 list_for_each_entry(alias, &pmu->aliases, list) {
1807                         if (strchr(alias->name, '-'))
1808                                 len++;
1809                         len++;
1810                 }
1811         }
1812
1813         if (len == 0) {
1814                 perf_pmu_events_list_num = -1;
1815                 return;
1816         }
1817         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1818         if (!perf_pmu_events_list)
1819                 return;
1820         perf_pmu_events_list_num = len;
1821
1822         len = 0;
1823         pmu = NULL;
1824         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1825                 list_for_each_entry(alias, &pmu->aliases, list) {
1826                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1827                         char *tmp = strchr(alias->name, '-');
1828
1829                         if (tmp != NULL) {
1830                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1831                                                 PMU_EVENT_SYMBOL_PREFIX);
1832                                 p++;
1833                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1834                                 len += 2;
1835                         } else {
1836                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1837                                 len++;
1838                         }
1839                 }
1840         }
1841         qsort(perf_pmu_events_list, len,
1842                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1843
1844         return;
1845 err:
1846         perf_pmu__parse_cleanup();
1847 }
1848
1849 enum perf_pmu_event_symbol_type
1850 perf_pmu__parse_check(const char *name)
1851 {
1852         struct perf_pmu_event_symbol p, *r;
1853
1854         /* scan kernel pmu events from sysfs if needed */
1855         if (perf_pmu_events_list_num == 0)
1856                 perf_pmu__parse_init();
1857         /*
1858          * name "cpu" could be prefix of cpu-cycles or cpu// events.
1859          * cpu-cycles has been handled by hardcode.
1860          * So it must be cpu// events, not kernel pmu event.
1861          */
1862         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1863                 return PMU_EVENT_SYMBOL_ERR;
1864
1865         p.symbol = strdup(name);
1866         r = bsearch(&p, perf_pmu_events_list,
1867                         (size_t) perf_pmu_events_list_num,
1868                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
1869         zfree(&p.symbol);
1870         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1871 }
1872
1873 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1874 {
1875         YY_BUFFER_STATE buffer;
1876         void *scanner;
1877         int ret;
1878
1879         ret = parse_events_lex_init_extra(start_token, &scanner);
1880         if (ret)
1881                 return ret;
1882
1883         buffer = parse_events__scan_string(str, scanner);
1884
1885 #ifdef PARSER_DEBUG
1886         parse_events_debug = 1;
1887 #endif
1888         ret = parse_events_parse(parse_state, scanner);
1889
1890         parse_events__flush_buffer(buffer, scanner);
1891         parse_events__delete_buffer(buffer, scanner);
1892         parse_events_lex_destroy(scanner);
1893         return ret;
1894 }
1895
1896 /*
1897  * parse event config string, return a list of event terms.
1898  */
1899 int parse_events_terms(struct list_head *terms, const char *str)
1900 {
1901         struct parse_events_state parse_state = {
1902                 .terms = NULL,
1903         };
1904         int ret;
1905
1906         ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1907         if (!ret) {
1908                 list_splice(parse_state.terms, terms);
1909                 zfree(&parse_state.terms);
1910                 return 0;
1911         }
1912
1913         parse_events_terms__delete(parse_state.terms);
1914         return ret;
1915 }
1916
1917 int parse_events(struct evlist *evlist, const char *str,
1918                  struct parse_events_error *err)
1919 {
1920         struct parse_events_state parse_state = {
1921                 .list   = LIST_HEAD_INIT(parse_state.list),
1922                 .idx    = evlist->core.nr_entries,
1923                 .error  = err,
1924                 .evlist = evlist,
1925         };
1926         int ret;
1927
1928         ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1929         perf_pmu__parse_cleanup();
1930         if (!ret) {
1931                 struct evsel *last;
1932
1933                 if (list_empty(&parse_state.list)) {
1934                         WARN_ONCE(true, "WARNING: event parser found nothing\n");
1935                         return -1;
1936                 }
1937
1938                 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1939                 evlist->nr_groups += parse_state.nr_groups;
1940                 last = evlist__last(evlist);
1941                 last->cmdline_group_boundary = true;
1942
1943                 return 0;
1944         }
1945
1946         /*
1947          * There are 2 users - builtin-record and builtin-test objects.
1948          * Both call evlist__delete in case of error, so we dont
1949          * need to bother.
1950          */
1951         return ret;
1952 }
1953
1954 #define MAX_WIDTH 1000
1955 static int get_term_width(void)
1956 {
1957         struct winsize ws;
1958
1959         get_term_dimensions(&ws);
1960         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1961 }
1962
1963 void parse_events_print_error(struct parse_events_error *err,
1964                               const char *event)
1965 {
1966         const char *str = "invalid or unsupported event: ";
1967         char _buf[MAX_WIDTH];
1968         char *buf = (char *) event;
1969         int idx = 0;
1970
1971         if (err->str) {
1972                 /* -2 for extra '' in the final fprintf */
1973                 int width       = get_term_width() - 2;
1974                 int len_event   = strlen(event);
1975                 int len_str, max_len, cut = 0;
1976
1977                 /*
1978                  * Maximum error index indent, we will cut
1979                  * the event string if it's bigger.
1980                  */
1981                 int max_err_idx = 13;
1982
1983                 /*
1984                  * Let's be specific with the message when
1985                  * we have the precise error.
1986                  */
1987                 str     = "event syntax error: ";
1988                 len_str = strlen(str);
1989                 max_len = width - len_str;
1990
1991                 buf = _buf;
1992
1993                 /* We're cutting from the beginning. */
1994                 if (err->idx > max_err_idx)
1995                         cut = err->idx - max_err_idx;
1996
1997                 strncpy(buf, event + cut, max_len);
1998
1999                 /* Mark cut parts with '..' on both sides. */
2000                 if (cut)
2001                         buf[0] = buf[1] = '.';
2002
2003                 if ((len_event - cut) > max_len) {
2004                         buf[max_len - 1] = buf[max_len - 2] = '.';
2005                         buf[max_len] = 0;
2006                 }
2007
2008                 idx = len_str + err->idx - cut;
2009         }
2010
2011         fprintf(stderr, "%s'%s'\n", str, buf);
2012         if (idx) {
2013                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
2014                 if (err->help)
2015                         fprintf(stderr, "\n%s\n", err->help);
2016                 zfree(&err->str);
2017                 zfree(&err->help);
2018         }
2019 }
2020
2021 #undef MAX_WIDTH
2022
2023 int parse_events_option(const struct option *opt, const char *str,
2024                         int unset __maybe_unused)
2025 {
2026         struct evlist *evlist = *(struct evlist **)opt->value;
2027         struct parse_events_error err = { .idx = 0, };
2028         int ret = parse_events(evlist, str, &err);
2029
2030         if (ret) {
2031                 parse_events_print_error(&err, str);
2032                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2033         }
2034
2035         return ret;
2036 }
2037
2038 static int
2039 foreach_evsel_in_last_glob(struct evlist *evlist,
2040                            int (*func)(struct evsel *evsel,
2041                                        const void *arg),
2042                            const void *arg)
2043 {
2044         struct evsel *last = NULL;
2045         int err;
2046
2047         /*
2048          * Don't return when list_empty, give func a chance to report
2049          * error when it found last == NULL.
2050          *
2051          * So no need to WARN here, let *func do this.
2052          */
2053         if (evlist->core.nr_entries > 0)
2054                 last = evlist__last(evlist);
2055
2056         do {
2057                 err = (*func)(last, arg);
2058                 if (err)
2059                         return -1;
2060                 if (!last)
2061                         return 0;
2062
2063                 if (last->core.node.prev == &evlist->core.entries)
2064                         return 0;
2065                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2066         } while (!last->cmdline_group_boundary);
2067
2068         return 0;
2069 }
2070
2071 static int set_filter(struct evsel *evsel, const void *arg)
2072 {
2073         const char *str = arg;
2074         bool found = false;
2075         int nr_addr_filters = 0;
2076         struct perf_pmu *pmu = NULL;
2077
2078         if (evsel == NULL) {
2079                 fprintf(stderr,
2080                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2081                 return -1;
2082         }
2083
2084         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2085                 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2086                         fprintf(stderr,
2087                                 "not enough memory to hold filter string\n");
2088                         return -1;
2089                 }
2090
2091                 return 0;
2092         }
2093
2094         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2095                 if (pmu->type == evsel->core.attr.type) {
2096                         found = true;
2097                         break;
2098                 }
2099
2100         if (found)
2101                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2102                                     "%d", &nr_addr_filters);
2103
2104         if (!nr_addr_filters) {
2105                 fprintf(stderr,
2106                         "This CPU does not support address filtering\n");
2107                 return -1;
2108         }
2109
2110         if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2111                 fprintf(stderr,
2112                         "not enough memory to hold filter string\n");
2113                 return -1;
2114         }
2115
2116         return 0;
2117 }
2118
2119 int parse_filter(const struct option *opt, const char *str,
2120                  int unset __maybe_unused)
2121 {
2122         struct evlist *evlist = *(struct evlist **)opt->value;
2123
2124         return foreach_evsel_in_last_glob(evlist, set_filter,
2125                                           (const void *)str);
2126 }
2127
2128 static int add_exclude_perf_filter(struct evsel *evsel,
2129                                    const void *arg __maybe_unused)
2130 {
2131         char new_filter[64];
2132
2133         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2134                 fprintf(stderr,
2135                         "--exclude-perf option should follow a -e tracepoint option\n");
2136                 return -1;
2137         }
2138
2139         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2140
2141         if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2142                 fprintf(stderr,
2143                         "not enough memory to hold filter string\n");
2144                 return -1;
2145         }
2146
2147         return 0;
2148 }
2149
2150 int exclude_perf(const struct option *opt,
2151                  const char *arg __maybe_unused,
2152                  int unset __maybe_unused)
2153 {
2154         struct evlist *evlist = *(struct evlist **)opt->value;
2155
2156         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2157                                           NULL);
2158 }
2159
2160 static const char * const event_type_descriptors[] = {
2161         "Hardware event",
2162         "Software event",
2163         "Tracepoint event",
2164         "Hardware cache event",
2165         "Raw hardware event descriptor",
2166         "Hardware breakpoint",
2167 };
2168
2169 static int cmp_string(const void *a, const void *b)
2170 {
2171         const char * const *as = a;
2172         const char * const *bs = b;
2173
2174         return strcmp(*as, *bs);
2175 }
2176
2177 /*
2178  * Print the events from <debugfs_mount_point>/tracing/events
2179  */
2180
2181 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2182                              bool name_only)
2183 {
2184         DIR *sys_dir, *evt_dir;
2185         struct dirent *sys_dirent, *evt_dirent;
2186         char evt_path[MAXPATHLEN];
2187         char *dir_path;
2188         char **evt_list = NULL;
2189         unsigned int evt_i = 0, evt_num = 0;
2190         bool evt_num_known = false;
2191
2192 restart:
2193         sys_dir = tracing_events__opendir();
2194         if (!sys_dir)
2195                 return;
2196
2197         if (evt_num_known) {
2198                 evt_list = zalloc(sizeof(char *) * evt_num);
2199                 if (!evt_list)
2200                         goto out_close_sys_dir;
2201         }
2202
2203         for_each_subsystem(sys_dir, sys_dirent) {
2204                 if (subsys_glob != NULL &&
2205                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2206                         continue;
2207
2208                 dir_path = get_events_file(sys_dirent->d_name);
2209                 if (!dir_path)
2210                         continue;
2211                 evt_dir = opendir(dir_path);
2212                 if (!evt_dir)
2213                         goto next;
2214
2215                 for_each_event(dir_path, evt_dir, evt_dirent) {
2216                         if (event_glob != NULL &&
2217                             !strglobmatch(evt_dirent->d_name, event_glob))
2218                                 continue;
2219
2220                         if (!evt_num_known) {
2221                                 evt_num++;
2222                                 continue;
2223                         }
2224
2225                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2226                                  sys_dirent->d_name, evt_dirent->d_name);
2227
2228                         evt_list[evt_i] = strdup(evt_path);
2229                         if (evt_list[evt_i] == NULL) {
2230                                 put_events_file(dir_path);
2231                                 goto out_close_evt_dir;
2232                         }
2233                         evt_i++;
2234                 }
2235                 closedir(evt_dir);
2236 next:
2237                 put_events_file(dir_path);
2238         }
2239         closedir(sys_dir);
2240
2241         if (!evt_num_known) {
2242                 evt_num_known = true;
2243                 goto restart;
2244         }
2245         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2246         evt_i = 0;
2247         while (evt_i < evt_num) {
2248                 if (name_only) {
2249                         printf("%s ", evt_list[evt_i++]);
2250                         continue;
2251                 }
2252                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2253                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2254         }
2255         if (evt_num && pager_in_use())
2256                 printf("\n");
2257
2258 out_free:
2259         evt_num = evt_i;
2260         for (evt_i = 0; evt_i < evt_num; evt_i++)
2261                 zfree(&evt_list[evt_i]);
2262         zfree(&evt_list);
2263         return;
2264
2265 out_close_evt_dir:
2266         closedir(evt_dir);
2267 out_close_sys_dir:
2268         closedir(sys_dir);
2269
2270         printf("FATAL: not enough memory to print %s\n",
2271                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2272         if (evt_list)
2273                 goto out_free;
2274 }
2275
2276 /*
2277  * Check whether event is in <debugfs_mount_point>/tracing/events
2278  */
2279
2280 int is_valid_tracepoint(const char *event_string)
2281 {
2282         DIR *sys_dir, *evt_dir;
2283         struct dirent *sys_dirent, *evt_dirent;
2284         char evt_path[MAXPATHLEN];
2285         char *dir_path;
2286
2287         sys_dir = tracing_events__opendir();
2288         if (!sys_dir)
2289                 return 0;
2290
2291         for_each_subsystem(sys_dir, sys_dirent) {
2292                 dir_path = get_events_file(sys_dirent->d_name);
2293                 if (!dir_path)
2294                         continue;
2295                 evt_dir = opendir(dir_path);
2296                 if (!evt_dir)
2297                         goto next;
2298
2299                 for_each_event(dir_path, evt_dir, evt_dirent) {
2300                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2301                                  sys_dirent->d_name, evt_dirent->d_name);
2302                         if (!strcmp(evt_path, event_string)) {
2303                                 closedir(evt_dir);
2304                                 closedir(sys_dir);
2305                                 return 1;
2306                         }
2307                 }
2308                 closedir(evt_dir);
2309 next:
2310                 put_events_file(dir_path);
2311         }
2312         closedir(sys_dir);
2313         return 0;
2314 }
2315
2316 static bool is_event_supported(u8 type, unsigned config)
2317 {
2318         bool ret = true;
2319         int open_return;
2320         struct evsel *evsel;
2321         struct perf_event_attr attr = {
2322                 .type = type,
2323                 .config = config,
2324                 .disabled = 1,
2325         };
2326         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2327
2328         if (tmap == NULL)
2329                 return false;
2330
2331         evsel = evsel__new(&attr);
2332         if (evsel) {
2333                 open_return = evsel__open(evsel, NULL, tmap);
2334                 ret = open_return >= 0;
2335
2336                 if (open_return == -EACCES) {
2337                         /*
2338                          * This happens if the paranoid value
2339                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2340                          * Re-run with exclude_kernel set; we don't do that
2341                          * by default as some ARM machines do not support it.
2342                          *
2343                          */
2344                         evsel->core.attr.exclude_kernel = 1;
2345                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2346                 }
2347                 evsel__delete(evsel);
2348         }
2349
2350         perf_thread_map__put(tmap);
2351         return ret;
2352 }
2353
2354 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2355                       bool name_only)
2356 {
2357         struct probe_cache *pcache;
2358         struct probe_cache_entry *ent;
2359         struct strlist *bidlist, *sdtlist;
2360         struct strlist_config cfg = {.dont_dupstr = true};
2361         struct str_node *nd, *nd2;
2362         char *buf, *path, *ptr = NULL;
2363         bool show_detail = false;
2364         int ret;
2365
2366         sdtlist = strlist__new(NULL, &cfg);
2367         if (!sdtlist) {
2368                 pr_debug("Failed to allocate new strlist for SDT\n");
2369                 return;
2370         }
2371         bidlist = build_id_cache__list_all(true);
2372         if (!bidlist) {
2373                 pr_debug("Failed to get buildids: %d\n", errno);
2374                 return;
2375         }
2376         strlist__for_each_entry(nd, bidlist) {
2377                 pcache = probe_cache__new(nd->s, NULL);
2378                 if (!pcache)
2379                         continue;
2380                 list_for_each_entry(ent, &pcache->entries, node) {
2381                         if (!ent->sdt)
2382                                 continue;
2383                         if (subsys_glob &&
2384                             !strglobmatch(ent->pev.group, subsys_glob))
2385                                 continue;
2386                         if (event_glob &&
2387                             !strglobmatch(ent->pev.event, event_glob))
2388                                 continue;
2389                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2390                                         ent->pev.event, nd->s);
2391                         if (ret > 0)
2392                                 strlist__add(sdtlist, buf);
2393                 }
2394                 probe_cache__delete(pcache);
2395         }
2396         strlist__delete(bidlist);
2397
2398         strlist__for_each_entry(nd, sdtlist) {
2399                 buf = strchr(nd->s, '@');
2400                 if (buf)
2401                         *(buf++) = '\0';
2402                 if (name_only) {
2403                         printf("%s ", nd->s);
2404                         continue;
2405                 }
2406                 nd2 = strlist__next(nd);
2407                 if (nd2) {
2408                         ptr = strchr(nd2->s, '@');
2409                         if (ptr)
2410                                 *ptr = '\0';
2411                         if (strcmp(nd->s, nd2->s) == 0)
2412                                 show_detail = true;
2413                 }
2414                 if (show_detail) {
2415                         path = build_id_cache__origname(buf);
2416                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2417                         if (ret > 0) {
2418                                 printf("  %-50s [%s]\n", buf, "SDT event");
2419                                 free(buf);
2420                         }
2421                         free(path);
2422                 } else
2423                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2424                 if (nd2) {
2425                         if (strcmp(nd->s, nd2->s) != 0)
2426                                 show_detail = false;
2427                         if (ptr)
2428                                 *ptr = '@';
2429                 }
2430         }
2431         strlist__delete(sdtlist);
2432 }
2433
2434 int print_hwcache_events(const char *event_glob, bool name_only)
2435 {
2436         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2437         char name[64];
2438         char **evt_list = NULL;
2439         bool evt_num_known = false;
2440
2441 restart:
2442         if (evt_num_known) {
2443                 evt_list = zalloc(sizeof(char *) * evt_num);
2444                 if (!evt_list)
2445                         goto out_enomem;
2446         }
2447
2448         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2449                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2450                         /* skip invalid cache type */
2451                         if (!perf_evsel__is_cache_op_valid(type, op))
2452                                 continue;
2453
2454                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2455                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2456                                                                         name, sizeof(name));
2457                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2458                                         continue;
2459
2460                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2461                                                         type | (op << 8) | (i << 16)))
2462                                         continue;
2463
2464                                 if (!evt_num_known) {
2465                                         evt_num++;
2466                                         continue;
2467                                 }
2468
2469                                 evt_list[evt_i] = strdup(name);
2470                                 if (evt_list[evt_i] == NULL)
2471                                         goto out_enomem;
2472                                 evt_i++;
2473                         }
2474                 }
2475         }
2476
2477         if (!evt_num_known) {
2478                 evt_num_known = true;
2479                 goto restart;
2480         }
2481         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2482         evt_i = 0;
2483         while (evt_i < evt_num) {
2484                 if (name_only) {
2485                         printf("%s ", evt_list[evt_i++]);
2486                         continue;
2487                 }
2488                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2489                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2490         }
2491         if (evt_num && pager_in_use())
2492                 printf("\n");
2493
2494 out_free:
2495         evt_num = evt_i;
2496         for (evt_i = 0; evt_i < evt_num; evt_i++)
2497                 zfree(&evt_list[evt_i]);
2498         zfree(&evt_list);
2499         return evt_num;
2500
2501 out_enomem:
2502         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2503         if (evt_list)
2504                 goto out_free;
2505         return evt_num;
2506 }
2507
2508 static void print_tool_event(const char *name, const char *event_glob,
2509                              bool name_only)
2510 {
2511         if (event_glob && !strglobmatch(name, event_glob))
2512                 return;
2513         if (name_only)
2514                 printf("%s ", name);
2515         else
2516                 printf("  %-50s [%s]\n", name, "Tool event");
2517
2518 }
2519
2520 void print_tool_events(const char *event_glob, bool name_only)
2521 {
2522         print_tool_event("duration_time", event_glob, name_only);
2523         if (pager_in_use())
2524                 printf("\n");
2525 }
2526
2527 void print_symbol_events(const char *event_glob, unsigned type,
2528                                 struct event_symbol *syms, unsigned max,
2529                                 bool name_only)
2530 {
2531         unsigned int i, evt_i = 0, evt_num = 0;
2532         char name[MAX_NAME_LEN];
2533         char **evt_list = NULL;
2534         bool evt_num_known = false;
2535
2536 restart:
2537         if (evt_num_known) {
2538                 evt_list = zalloc(sizeof(char *) * evt_num);
2539                 if (!evt_list)
2540                         goto out_enomem;
2541                 syms -= max;
2542         }
2543
2544         for (i = 0; i < max; i++, syms++) {
2545
2546                 if (event_glob != NULL && syms->symbol != NULL &&
2547                     !(strglobmatch(syms->symbol, event_glob) ||
2548                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2549                         continue;
2550
2551                 if (!is_event_supported(type, i))
2552                         continue;
2553
2554                 if (!evt_num_known) {
2555                         evt_num++;
2556                         continue;
2557                 }
2558
2559                 if (!name_only && strlen(syms->alias))
2560                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2561                 else
2562                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2563
2564                 evt_list[evt_i] = strdup(name);
2565                 if (evt_list[evt_i] == NULL)
2566                         goto out_enomem;
2567                 evt_i++;
2568         }
2569
2570         if (!evt_num_known) {
2571                 evt_num_known = true;
2572                 goto restart;
2573         }
2574         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2575         evt_i = 0;
2576         while (evt_i < evt_num) {
2577                 if (name_only) {
2578                         printf("%s ", evt_list[evt_i++]);
2579                         continue;
2580                 }
2581                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2582         }
2583         if (evt_num && pager_in_use())
2584                 printf("\n");
2585
2586 out_free:
2587         evt_num = evt_i;
2588         for (evt_i = 0; evt_i < evt_num; evt_i++)
2589                 zfree(&evt_list[evt_i]);
2590         zfree(&evt_list);
2591         return;
2592
2593 out_enomem:
2594         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2595         if (evt_list)
2596                 goto out_free;
2597 }
2598
2599 /*
2600  * Print the help text for the event symbols:
2601  */
2602 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2603                         bool long_desc, bool details_flag)
2604 {
2605         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2606                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2607
2608         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2609                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2610         print_tool_events(event_glob, name_only);
2611
2612         print_hwcache_events(event_glob, name_only);
2613
2614         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2615                         details_flag);
2616
2617         if (event_glob != NULL)
2618                 return;
2619
2620         if (!name_only) {
2621                 printf("  %-50s [%s]\n",
2622                        "rNNN",
2623                        event_type_descriptors[PERF_TYPE_RAW]);
2624                 printf("  %-50s [%s]\n",
2625                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2626                        event_type_descriptors[PERF_TYPE_RAW]);
2627                 if (pager_in_use())
2628                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2629
2630                 printf("  %-50s [%s]\n",
2631                        "mem:<addr>[/len][:access]",
2632                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2633                 if (pager_in_use())
2634                         printf("\n");
2635         }
2636
2637         print_tracepoint_events(NULL, NULL, name_only);
2638
2639         print_sdt_events(NULL, NULL, name_only);
2640
2641         metricgroup__print(true, true, NULL, name_only, details_flag);
2642 }
2643
2644 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2645 {
2646         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2647 }
2648
2649 static int new_term(struct parse_events_term **_term,
2650                     struct parse_events_term *temp,
2651                     char *str, u64 num)
2652 {
2653         struct parse_events_term *term;
2654
2655         term = malloc(sizeof(*term));
2656         if (!term)
2657                 return -ENOMEM;
2658
2659         *term = *temp;
2660         INIT_LIST_HEAD(&term->list);
2661         term->weak = false;
2662
2663         switch (term->type_val) {
2664         case PARSE_EVENTS__TERM_TYPE_NUM:
2665                 term->val.num = num;
2666                 break;
2667         case PARSE_EVENTS__TERM_TYPE_STR:
2668                 term->val.str = str;
2669                 break;
2670         default:
2671                 free(term);
2672                 return -EINVAL;
2673         }
2674
2675         *_term = term;
2676         return 0;
2677 }
2678
2679 int parse_events_term__num(struct parse_events_term **term,
2680                            int type_term, char *config, u64 num,
2681                            bool no_value,
2682                            void *loc_term_, void *loc_val_)
2683 {
2684         YYLTYPE *loc_term = loc_term_;
2685         YYLTYPE *loc_val = loc_val_;
2686
2687         struct parse_events_term temp = {
2688                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2689                 .type_term = type_term,
2690                 .config    = config,
2691                 .no_value  = no_value,
2692                 .err_term  = loc_term ? loc_term->first_column : 0,
2693                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2694         };
2695
2696         return new_term(term, &temp, NULL, num);
2697 }
2698
2699 int parse_events_term__str(struct parse_events_term **term,
2700                            int type_term, char *config, char *str,
2701                            void *loc_term_, void *loc_val_)
2702 {
2703         YYLTYPE *loc_term = loc_term_;
2704         YYLTYPE *loc_val = loc_val_;
2705
2706         struct parse_events_term temp = {
2707                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2708                 .type_term = type_term,
2709                 .config    = config,
2710                 .err_term  = loc_term ? loc_term->first_column : 0,
2711                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2712         };
2713
2714         return new_term(term, &temp, str, 0);
2715 }
2716
2717 int parse_events_term__sym_hw(struct parse_events_term **term,
2718                               char *config, unsigned idx)
2719 {
2720         struct event_symbol *sym;
2721         struct parse_events_term temp = {
2722                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2723                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2724                 .config    = config ?: (char *) "event",
2725         };
2726
2727         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2728         sym = &event_symbols_hw[idx];
2729
2730         return new_term(term, &temp, (char *) sym->symbol, 0);
2731 }
2732
2733 int parse_events_term__clone(struct parse_events_term **new,
2734                              struct parse_events_term *term)
2735 {
2736         struct parse_events_term temp = {
2737                 .type_val  = term->type_val,
2738                 .type_term = term->type_term,
2739                 .config    = term->config,
2740                 .err_term  = term->err_term,
2741                 .err_val   = term->err_val,
2742         };
2743
2744         return new_term(new, &temp, term->val.str, term->val.num);
2745 }
2746
2747 int parse_events_copy_term_list(struct list_head *old,
2748                                  struct list_head **new)
2749 {
2750         struct parse_events_term *term, *n;
2751         int ret;
2752
2753         if (!old) {
2754                 *new = NULL;
2755                 return 0;
2756         }
2757
2758         *new = malloc(sizeof(struct list_head));
2759         if (!*new)
2760                 return -ENOMEM;
2761         INIT_LIST_HEAD(*new);
2762
2763         list_for_each_entry (term, old, list) {
2764                 ret = parse_events_term__clone(&n, term);
2765                 if (ret)
2766                         return ret;
2767                 list_add_tail(&n->list, *new);
2768         }
2769         return 0;
2770 }
2771
2772 void parse_events_terms__purge(struct list_head *terms)
2773 {
2774         struct parse_events_term *term, *h;
2775
2776         list_for_each_entry_safe(term, h, terms, list) {
2777                 if (term->array.nr_ranges)
2778                         zfree(&term->array.ranges);
2779                 list_del_init(&term->list);
2780                 free(term);
2781         }
2782 }
2783
2784 void parse_events_terms__delete(struct list_head *terms)
2785 {
2786         if (!terms)
2787                 return;
2788         parse_events_terms__purge(terms);
2789         free(terms);
2790 }
2791
2792 void parse_events__clear_array(struct parse_events_array *a)
2793 {
2794         zfree(&a->ranges);
2795 }
2796
2797 void parse_events_evlist_error(struct parse_events_state *parse_state,
2798                                int idx, const char *str)
2799 {
2800         struct parse_events_error *err = parse_state->error;
2801
2802         if (!err)
2803                 return;
2804         err->idx = idx;
2805         err->str = strdup(str);
2806         WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2807 }
2808
2809 static void config_terms_list(char *buf, size_t buf_sz)
2810 {
2811         int i;
2812         bool first = true;
2813
2814         buf[0] = '\0';
2815         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2816                 const char *name = config_term_names[i];
2817
2818                 if (!config_term_avail(i, NULL))
2819                         continue;
2820                 if (!name)
2821                         continue;
2822                 if (name[0] == '<')
2823                         continue;
2824
2825                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2826                         return;
2827
2828                 if (!first)
2829                         strcat(buf, ",");
2830                 else
2831                         first = false;
2832                 strcat(buf, name);
2833         }
2834 }
2835
2836 /*
2837  * Return string contains valid config terms of an event.
2838  * @additional_terms: For terms such as PMU sysfs terms.
2839  */
2840 char *parse_events_formats_error_string(char *additional_terms)
2841 {
2842         char *str;
2843         /* "no-overwrite" is the longest name */
2844         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2845                           (sizeof("no-overwrite") - 1)];
2846
2847         config_terms_list(static_terms, sizeof(static_terms));
2848         /* valid terms */
2849         if (additional_terms) {
2850                 if (asprintf(&str, "valid terms: %s,%s",
2851                              additional_terms, static_terms) < 0)
2852                         goto fail;
2853         } else {
2854                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2855                         goto fail;
2856         }
2857         return str;
2858
2859 fail:
2860         return NULL;
2861 }