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