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