tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE void*
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "probe-file.h"
  34 #include "asm/bug.h"
  35 #include "util/parse-branch-options.h"
  36 #include "metricgroup.h"
  37 #include "util/evsel_config.h"
  38 #include "util/event.h"
  39 #include "util/pfm.h"
  40 #include "util/parse-events-hybrid.h"
  41 #include "util/pmu-hybrid.h"
  42 #include "perf.h"
  43
  44 #define MAX_NAME_LEN 100
  45
  46 #ifdef PARSER_DEBUG
  47 extern int parse_events_debug;
  48 #endif
  49 int parse_events_parse(void *parse_state, void *scanner);
  50 static int get_config_terms(struct list_head *head_config,
  51                             struct list_head *head_terms __maybe_unused);
  52 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
  53                                          const char *str, char *pmu_name,
  54                                          struct list_head *list);
  55
  56 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  57 /*
  58  * The variable indicates the number of supported pmu event symbols.
  59  * 0 means not initialized and ready to init
  60  * -1 means failed to init, don't try anymore
  61  * >0 is the number of supported pmu event symbols
  62  */
  63 static int perf_pmu_events_list_num;
  64
  65 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  66         [PERF_COUNT_HW_CPU_CYCLES] = {
  67                 .symbol = "cpu-cycles",
  68                 .alias  = "cycles",
  69         },
  70         [PERF_COUNT_HW_INSTRUCTIONS] = {
  71                 .symbol = "instructions",
  72                 .alias  = "",
  73         },
  74         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  75                 .symbol = "cache-references",
  76                 .alias  = "",
  77         },
  78         [PERF_COUNT_HW_CACHE_MISSES] = {
  79                 .symbol = "cache-misses",
  80                 .alias  = "",
  81         },
  82         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  83                 .symbol = "branch-instructions",
  84                 .alias  = "branches",
  85         },
  86         [PERF_COUNT_HW_BRANCH_MISSES] = {
  87                 .symbol = "branch-misses",
  88                 .alias  = "",
  89         },
  90         [PERF_COUNT_HW_BUS_CYCLES] = {
  91                 .symbol = "bus-cycles",
  92                 .alias  = "",
  93         },
  94         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  95                 .symbol = "stalled-cycles-frontend",
  96                 .alias  = "idle-cycles-frontend",
  97         },
  98         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  99                 .symbol = "stalled-cycles-backend",
 100                 .alias  = "idle-cycles-backend",
 101         },
 102         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
 103                 .symbol = "ref-cycles",
 104                 .alias  = "",
 105         },
 106 };
 107
 108 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 109         [PERF_COUNT_SW_CPU_CLOCK] = {
 110                 .symbol = "cpu-clock",
 111                 .alias  = "",
 112         },
 113         [PERF_COUNT_SW_TASK_CLOCK] = {
 114                 .symbol = "task-clock",
 115                 .alias  = "",
 116         },
 117         [PERF_COUNT_SW_PAGE_FAULTS] = {
 118                 .symbol = "page-faults",
 119                 .alias  = "faults",
 120         },
 121         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 122                 .symbol = "context-switches",
 123                 .alias  = "cs",
 124         },
 125         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 126                 .symbol = "cpu-migrations",
 127                 .alias  = "migrations",
 128         },
 129         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 130                 .symbol = "minor-faults",
 131                 .alias  = "",
 132         },
 133         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 134                 .symbol = "major-faults",
 135                 .alias  = "",
 136         },
 137         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 138                 .symbol = "alignment-faults",
 139                 .alias  = "",
 140         },
 141         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 142                 .symbol = "emulation-faults",
 143                 .alias  = "",
 144         },
 145         [PERF_COUNT_SW_DUMMY] = {
 146                 .symbol = "dummy",
 147                 .alias  = "",
 148         },
 149         [PERF_COUNT_SW_BPF_OUTPUT] = {
 150                 .symbol = "bpf-output",
 151                 .alias  = "",
 152         },
 153         [PERF_COUNT_SW_CGROUP_SWITCHES] = {
 154                 .symbol = "cgroup-switches",
 155                 .alias  = "",
 156         },
 157 };
 158
 159 #define __PERF_EVENT_FIELD(config, name) \
 160         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 161
 162 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 163 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 164 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 165 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 166
 167 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 168         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 169                 if (sys_dirent->d_type == DT_DIR &&             \
 170                     (strcmp(sys_dirent->d_name, ".")) &&        \
 171                     (strcmp(sys_dirent->d_name, "..")))
 172
 173 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 174 {
 175         char evt_path[MAXPATHLEN];
 176         int fd;
 177
 178         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 179         fd = open(evt_path, O_RDONLY);
 180         if (fd < 0)
 181                 return -EINVAL;
 182         close(fd);
 183
 184         return 0;
 185 }
 186
 187 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 188         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 189                 if (evt_dirent->d_type == DT_DIR &&             \
 190                     (strcmp(evt_dirent->d_name, ".")) &&        \
 191                     (strcmp(evt_dirent->d_name, "..")) &&       \
 192                     (!tp_event_has_id(dir_path, evt_dirent)))
 193
 194 #define MAX_EVENT_LENGTH 512
 195
 196 void parse_events__handle_error(struct parse_events_error *err, int idx,
 197                                 char *str, char *help)
 198 {
 199         if (WARN(!str, "WARNING: failed to provide error string\n")) {
 200                 free(help);
 201                 return;
 202         }
 203         switch (err->num_errors) {
 204         case 0:
 205                 err->idx = idx;
 206                 err->str = str;
 207                 err->help = help;
 208                 break;
 209         case 1:
 210                 err->first_idx = err->idx;
 211                 err->idx = idx;
 212                 err->first_str = err->str;
 213                 err->str = str;
 214                 err->first_help = err->help;
 215                 err->help = help;
 216                 break;
 217         default:
 218                 pr_debug("Multiple errors dropping message: %s (%s)\n",
 219                         err->str, err->help);
 220                 free(err->str);
 221                 err->str = str;
 222                 free(err->help);
 223                 err->help = help;
 224                 break;
 225         }
 226         err->num_errors++;
 227 }
 228
 229 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 230 {
 231         struct tracepoint_path *path = NULL;
 232         DIR *sys_dir, *evt_dir;
 233         struct dirent *sys_dirent, *evt_dirent;
 234         char id_buf[24];
 235         int fd;
 236         u64 id;
 237         char evt_path[MAXPATHLEN];
 238         char *dir_path;
 239
 240         sys_dir = tracing_events__opendir();
 241         if (!sys_dir)
 242                 return NULL;
 243
 244         for_each_subsystem(sys_dir, sys_dirent) {
 245                 dir_path = get_events_file(sys_dirent->d_name);
 246                 if (!dir_path)
 247                         continue;
 248                 evt_dir = opendir(dir_path);
 249                 if (!evt_dir)
 250                         goto next;
 251
 252                 for_each_event(dir_path, evt_dir, evt_dirent) {
 253
 254                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 255                                   evt_dirent->d_name);
 256                         fd = open(evt_path, O_RDONLY);
 257                         if (fd < 0)
 258                                 continue;
 259                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 260                                 close(fd);
 261                                 continue;
 262                         }
 263                         close(fd);
 264                         id = atoll(id_buf);
 265                         if (id == config) {
 266                                 put_events_file(dir_path);
 267                                 closedir(evt_dir);
 268                                 closedir(sys_dir);
 269                                 path = zalloc(sizeof(*path));
 270                                 if (!path)
 271                                         return NULL;
 272                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 273                                         free(path);
 274                                         return NULL;
 275                                 }
 276                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 277                                         zfree(&path->system);
 278                                         free(path);
 279                                         return NULL;
 280                                 }
 281                                 return path;
 282                         }
 283                 }
 284                 closedir(evt_dir);
 285 next:
 286                 put_events_file(dir_path);
 287         }
 288
 289         closedir(sys_dir);
 290         return NULL;
 291 }
 292
 293 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 294 {
 295         struct tracepoint_path *path = zalloc(sizeof(*path));
 296         char *str = strchr(name, ':');
 297
 298         if (path == NULL || str == NULL) {
 299                 free(path);
 300                 return NULL;
 301         }
 302
 303         path->system = strndup(name, str - name);
 304         path->name = strdup(str+1);
 305
 306         if (path->system == NULL || path->name == NULL) {
 307                 zfree(&path->system);
 308                 zfree(&path->name);
 309                 zfree(&path);
 310         }
 311
 312         return path;
 313 }
 314
 315 const char *event_type(int type)
 316 {
 317         switch (type) {
 318         case PERF_TYPE_HARDWARE:
 319                 return "hardware";
 320
 321         case PERF_TYPE_SOFTWARE:
 322                 return "software";
 323
 324         case PERF_TYPE_TRACEPOINT:
 325                 return "tracepoint";
 326
 327         case PERF_TYPE_HW_CACHE:
 328                 return "hardware-cache";
 329
 330         default:
 331                 break;
 332         }
 333
 334         return "unknown";
 335 }
 336
 337 static int parse_events__is_name_term(struct parse_events_term *term)
 338 {
 339         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 340 }
 341
 342 static char *get_config_name(struct list_head *head_terms)
 343 {
 344         struct parse_events_term *term;
 345
 346         if (!head_terms)
 347                 return NULL;
 348
 349         list_for_each_entry(term, head_terms, list)
 350                 if (parse_events__is_name_term(term))
 351                         return term->val.str;
 352
 353         return NULL;
 354 }
 355
 356 static struct evsel *
 357 __add_event(struct list_head *list, int *idx,
 358             struct perf_event_attr *attr,
 359             bool init_attr,
 360             char *name, struct perf_pmu *pmu,
 361             struct list_head *config_terms, bool auto_merge_stats,
 362             const char *cpu_list)
 363 {
 364         struct evsel *evsel;
 365         struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
 366                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 367
 368         if (pmu && attr->type == PERF_TYPE_RAW)
 369                 perf_pmu__warn_invalid_config(pmu, attr->config, name);
 370
 371         if (init_attr)
 372                 event_attr_init(attr);
 373
 374         evsel = evsel__new_idx(attr, *idx);
 375         if (!evsel) {
 376                 perf_cpu_map__put(cpus);
 377                 return NULL;
 378         }
 379
 380         (*idx)++;
 381         evsel->core.cpus = cpus;
 382         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 383         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 384         evsel->auto_merge_stats = auto_merge_stats;
 385
 386         if (name)
 387                 evsel->name = strdup(name);
 388
 389         if (config_terms)
 390                 list_splice_init(config_terms, &evsel->config_terms);
 391
 392         if (list)
 393                 list_add_tail(&evsel->core.node, list);
 394
 395         return evsel;
 396 }
 397
 398 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
 399                                         char *name, struct perf_pmu *pmu)
 400 {
 401         return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
 402                            NULL);
 403 }
 404
 405 static int add_event(struct list_head *list, int *idx,
 406                      struct perf_event_attr *attr, char *name,
 407                      struct list_head *config_terms)
 408 {
 409         return __add_event(list, idx, attr, true, name, NULL, config_terms,
 410                            false, NULL) ? 0 : -ENOMEM;
 411 }
 412
 413 static int add_event_tool(struct list_head *list, int *idx,
 414                           enum perf_tool_event tool_event)
 415 {
 416         struct evsel *evsel;
 417         struct perf_event_attr attr = {
 418                 .type = PERF_TYPE_SOFTWARE,
 419                 .config = PERF_COUNT_SW_DUMMY,
 420         };
 421
 422         evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
 423                             "0");
 424         if (!evsel)
 425                 return -ENOMEM;
 426         evsel->tool_event = tool_event;
 427         if (tool_event == PERF_TOOL_DURATION_TIME)
 428                 evsel->unit = "ns";
 429         return 0;
 430 }
 431
 432 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
 433 {
 434         int i, j;
 435         int n, longest = -1;
 436
 437         for (i = 0; i < size; i++) {
 438                 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
 439                         n = strlen(names[i][j]);
 440                         if (n > longest && !strncasecmp(str, names[i][j], n))
 441                                 longest = n;
 442                 }
 443                 if (longest > 0)
 444                         return i;
 445         }
 446
 447         return -1;
 448 }
 449
 450 typedef int config_term_func_t(struct perf_event_attr *attr,
 451                                struct parse_events_term *term,
 452                                struct parse_events_error *err);
 453 static int config_term_common(struct perf_event_attr *attr,
 454                               struct parse_events_term *term,
 455                               struct parse_events_error *err);
 456 static int config_attr(struct perf_event_attr *attr,
 457                        struct list_head *head,
 458                        struct parse_events_error *err,
 459                        config_term_func_t config_term);
 460
 461 int parse_events_add_cache(struct list_head *list, int *idx,
 462                            char *type, char *op_result1, char *op_result2,
 463                            struct parse_events_error *err,
 464                            struct list_head *head_config,
 465                            struct parse_events_state *parse_state)
 466 {
 467         struct perf_event_attr attr;
 468         LIST_HEAD(config_terms);
 469         char name[MAX_NAME_LEN], *config_name;
 470         int cache_type = -1, cache_op = -1, cache_result = -1;
 471         char *op_result[2] = { op_result1, op_result2 };
 472         int i, n, ret;
 473         bool hybrid;
 474
 475         /*
 476          * No fallback - if we cannot get a clear cache type
 477          * then bail out:
 478          */
 479         cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 480         if (cache_type == -1)
 481                 return -EINVAL;
 482
 483         config_name = get_config_name(head_config);
 484         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 485
 486         for (i = 0; (i < 2) && (op_result[i]); i++) {
 487                 char *str = op_result[i];
 488
 489                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 490
 491                 if (cache_op == -1) {
 492                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 493                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 494                         if (cache_op >= 0) {
 495                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 496                                         return -EINVAL;
 497                                 continue;
 498                         }
 499                 }
 500
 501                 if (cache_result == -1) {
 502                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 503                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 504                         if (cache_result >= 0)
 505                                 continue;
 506                 }
 507         }
 508
 509         /*
 510          * Fall back to reads:
 511          */
 512         if (cache_op == -1)
 513                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 514
 515         /*
 516          * Fall back to accesses:
 517          */
 518         if (cache_result == -1)
 519                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 520
 521         memset(&attr, 0, sizeof(attr));
 522         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 523         attr.type = PERF_TYPE_HW_CACHE;
 524
 525         if (head_config) {
 526                 if (config_attr(&attr, head_config, err,
 527                                 config_term_common))
 528                         return -EINVAL;
 529
 530                 if (get_config_terms(head_config, &config_terms))
 531                         return -ENOMEM;
 532         }
 533
 534         ret = parse_events__add_cache_hybrid(list, idx, &attr,
 535                                              config_name ? : name, &config_terms,
 536                                              &hybrid, parse_state);
 537         if (hybrid)
 538                 goto out_free_terms;
 539
 540         ret = add_event(list, idx, &attr, config_name ? : name, &config_terms);
 541 out_free_terms:
 542         free_config_terms(&config_terms);
 543         return ret;
 544 }
 545
 546 static void tracepoint_error(struct parse_events_error *e, int err,
 547                              const char *sys, const char *name)
 548 {
 549         const char *str;
 550         char help[BUFSIZ];
 551
 552         if (!e)
 553                 return;
 554
 555         /*
 556          * We get error directly from syscall errno ( > 0),
 557          * or from encoded pointer's error ( < 0).
 558          */
 559         err = abs(err);
 560
 561         switch (err) {
 562         case EACCES:
 563                 str = "can't access trace events";
 564                 break;
 565         case ENOENT:
 566                 str = "unknown tracepoint";
 567                 break;
 568         default:
 569                 str = "failed to add tracepoint";
 570                 break;
 571         }
 572
 573         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 574         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 575 }
 576
 577 static int add_tracepoint(struct list_head *list, int *idx,
 578                           const char *sys_name, const char *evt_name,
 579                           struct parse_events_error *err,
 580                           struct list_head *head_config)
 581 {
 582         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 583
 584         if (IS_ERR(evsel)) {
 585                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 586                 return PTR_ERR(evsel);
 587         }
 588
 589         if (head_config) {
 590                 LIST_HEAD(config_terms);
 591
 592                 if (get_config_terms(head_config, &config_terms))
 593                         return -ENOMEM;
 594                 list_splice(&config_terms, &evsel->config_terms);
 595         }
 596
 597         list_add_tail(&evsel->core.node, list);
 598         return 0;
 599 }
 600
 601 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 602                                       const char *sys_name, const char *evt_name,
 603                                       struct parse_events_error *err,
 604                                       struct list_head *head_config)
 605 {
 606         char *evt_path;
 607         struct dirent *evt_ent;
 608         DIR *evt_dir;
 609         int ret = 0, found = 0;
 610
 611         evt_path = get_events_file(sys_name);
 612         if (!evt_path) {
 613                 tracepoint_error(err, errno, sys_name, evt_name);
 614                 return -1;
 615         }
 616         evt_dir = opendir(evt_path);
 617         if (!evt_dir) {
 618                 put_events_file(evt_path);
 619                 tracepoint_error(err, errno, sys_name, evt_name);
 620                 return -1;
 621         }
 622
 623         while (!ret && (evt_ent = readdir(evt_dir))) {
 624                 if (!strcmp(evt_ent->d_name, ".")
 625                     || !strcmp(evt_ent->d_name, "..")
 626                     || !strcmp(evt_ent->d_name, "enable")
 627                     || !strcmp(evt_ent->d_name, "filter"))
 628                         continue;
 629
 630                 if (!strglobmatch(evt_ent->d_name, evt_name))
 631                         continue;
 632
 633                 found++;
 634
 635                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 636                                      err, head_config);
 637         }
 638
 639         if (!found) {
 640                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 641                 ret = -1;
 642         }
 643
 644         put_events_file(evt_path);
 645         closedir(evt_dir);
 646         return ret;
 647 }
 648
 649 static int add_tracepoint_event(struct list_head *list, int *idx,
 650                                 const char *sys_name, const char *evt_name,
 651                                 struct parse_events_error *err,
 652                                 struct list_head *head_config)
 653 {
 654         return strpbrk(evt_name, "*?") ?
 655                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 656                                           err, head_config) :
 657                add_tracepoint(list, idx, sys_name, evt_name,
 658                               err, head_config);
 659 }
 660
 661 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 662                                     const char *sys_name, const char *evt_name,
 663                                     struct parse_events_error *err,
 664                                     struct list_head *head_config)
 665 {
 666         struct dirent *events_ent;
 667         DIR *events_dir;
 668         int ret = 0;
 669
 670         events_dir = tracing_events__opendir();
 671         if (!events_dir) {
 672                 tracepoint_error(err, errno, sys_name, evt_name);
 673                 return -1;
 674         }
 675
 676         while (!ret && (events_ent = readdir(events_dir))) {
 677                 if (!strcmp(events_ent->d_name, ".")
 678                     || !strcmp(events_ent->d_name, "..")
 679                     || !strcmp(events_ent->d_name, "enable")
 680                     || !strcmp(events_ent->d_name, "header_event")
 681                     || !strcmp(events_ent->d_name, "header_page"))
 682                         continue;
 683
 684                 if (!strglobmatch(events_ent->d_name, sys_name))
 685                         continue;
 686
 687                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 688                                            evt_name, err, head_config);
 689         }
 690
 691         closedir(events_dir);
 692         return ret;
 693 }
 694
 695 #ifdef HAVE_LIBBPF_SUPPORT
 696 struct __add_bpf_event_param {
 697         struct parse_events_state *parse_state;
 698         struct list_head *list;
 699         struct list_head *head_config;
 700 };
 701
 702 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 703                          void *_param)
 704 {
 705         LIST_HEAD(new_evsels);
 706         struct __add_bpf_event_param *param = _param;
 707         struct parse_events_state *parse_state = param->parse_state;
 708         struct list_head *list = param->list;
 709         struct evsel *pos;
 710         int err;
 711         /*
 712          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 713          * then don't add the tracepoint, this will be used for something else, like
 714          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 715          *
 716          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 717          */
 718         if (group[0] == '!')
 719                 return 0;
 720
 721         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 722                  group, event, fd);
 723
 724         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 725                                           event, parse_state->error,
 726                                           param->head_config);
 727         if (err) {
 728                 struct evsel *evsel, *tmp;
 729
 730                 pr_debug("Failed to add BPF event %s:%s\n",
 731                          group, event);
 732                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 733                         list_del_init(&evsel->core.node);
 734                         evsel__delete(evsel);
 735                 }
 736                 return err;
 737         }
 738         pr_debug("adding %s:%s\n", group, event);
 739
 740         list_for_each_entry(pos, &new_evsels, core.node) {
 741                 pr_debug("adding %s:%s to %p\n",
 742                          group, event, pos);
 743                 pos->bpf_fd = fd;
 744                 pos->bpf_obj = obj;
 745         }
 746         list_splice(&new_evsels, list);
 747         return 0;
 748 }
 749
 750 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 751                               struct list_head *list,
 752                               struct bpf_object *obj,
 753                               struct list_head *head_config)
 754 {
 755         int err;
 756         char errbuf[BUFSIZ];
 757         struct __add_bpf_event_param param = {parse_state, list, head_config};
 758         static bool registered_unprobe_atexit = false;
 759
 760         if (IS_ERR(obj) || !obj) {
 761                 snprintf(errbuf, sizeof(errbuf),
 762                          "Internal error: load bpf obj with NULL");
 763                 err = -EINVAL;
 764                 goto errout;
 765         }
 766
 767         /*
 768          * Register atexit handler before calling bpf__probe() so
 769          * bpf__probe() don't need to unprobe probe points its already
 770          * created when failure.
 771          */
 772         if (!registered_unprobe_atexit) {
 773                 atexit(bpf__clear);
 774                 registered_unprobe_atexit = true;
 775         }
 776
 777         err = bpf__probe(obj);
 778         if (err) {
 779                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 780                 goto errout;
 781         }
 782
 783         err = bpf__load(obj);
 784         if (err) {
 785                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 786                 goto errout;
 787         }
 788
 789         err = bpf__foreach_event(obj, add_bpf_event, &param);
 790         if (err) {
 791                 snprintf(errbuf, sizeof(errbuf),
 792                          "Attach events in BPF object failed");
 793                 goto errout;
 794         }
 795
 796         return 0;
 797 errout:
 798         parse_events__handle_error(parse_state->error, 0,
 799                                 strdup(errbuf), strdup("(add -v to see detail)"));
 800         return err;
 801 }
 802
 803 static int
 804 parse_events_config_bpf(struct parse_events_state *parse_state,
 805                         struct bpf_object *obj,
 806                         struct list_head *head_config)
 807 {
 808         struct parse_events_term *term;
 809         int error_pos;
 810
 811         if (!head_config || list_empty(head_config))
 812                 return 0;
 813
 814         list_for_each_entry(term, head_config, list) {
 815                 int err;
 816
 817                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 818                         parse_events__handle_error(parse_state->error, term->err_term,
 819                                                 strdup("Invalid config term for BPF object"),
 820                                                 NULL);
 821                         return -EINVAL;
 822                 }
 823
 824                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 825                 if (err) {
 826                         char errbuf[BUFSIZ];
 827                         int idx;
 828
 829                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 830                                                  &error_pos, err, errbuf,
 831                                                  sizeof(errbuf));
 832
 833                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 834                                 idx = term->err_val;
 835                         else
 836                                 idx = term->err_term + error_pos;
 837
 838                         parse_events__handle_error(parse_state->error, idx,
 839                                                 strdup(errbuf),
 840                                                 strdup(
 841 "Hint:\tValid config terms:\n"
 842 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 843 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 844 "\n"
 845 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 846 "     \t(add -v to see detail)"));
 847                         return err;
 848                 }
 849         }
 850         return 0;
 851 }
 852
 853 /*
 854  * Split config terms:
 855  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 856  *  'call-graph=fp' is 'evt config', should be applied to each
 857  *  events in bpf.c.
 858  * 'map:array.value[0]=1' is 'obj config', should be processed
 859  * with parse_events_config_bpf.
 860  *
 861  * Move object config terms from the first list to obj_head_config.
 862  */
 863 static void
 864 split_bpf_config_terms(struct list_head *evt_head_config,
 865                        struct list_head *obj_head_config)
 866 {
 867         struct parse_events_term *term, *temp;
 868
 869         /*
 870          * Currently, all possible user config term
 871          * belong to bpf object. parse_events__is_hardcoded_term()
 872          * happens to be a good flag.
 873          *
 874          * See parse_events_config_bpf() and
 875          * config_term_tracepoint().
 876          */
 877         list_for_each_entry_safe(term, temp, evt_head_config, list)
 878                 if (!parse_events__is_hardcoded_term(term))
 879                         list_move_tail(&term->list, obj_head_config);
 880 }
 881
 882 int parse_events_load_bpf(struct parse_events_state *parse_state,
 883                           struct list_head *list,
 884                           char *bpf_file_name,
 885                           bool source,
 886                           struct list_head *head_config)
 887 {
 888         int err;
 889         struct bpf_object *obj;
 890         LIST_HEAD(obj_head_config);
 891
 892         if (head_config)
 893                 split_bpf_config_terms(head_config, &obj_head_config);
 894
 895         obj = bpf__prepare_load(bpf_file_name, source);
 896         if (IS_ERR(obj)) {
 897                 char errbuf[BUFSIZ];
 898
 899                 err = PTR_ERR(obj);
 900
 901                 if (err == -ENOTSUP)
 902                         snprintf(errbuf, sizeof(errbuf),
 903                                  "BPF support is not compiled");
 904                 else
 905                         bpf__strerror_prepare_load(bpf_file_name,
 906                                                    source,
 907                                                    -err, errbuf,
 908                                                    sizeof(errbuf));
 909
 910                 parse_events__handle_error(parse_state->error, 0,
 911                                         strdup(errbuf), strdup("(add -v to see detail)"));
 912                 return err;
 913         }
 914
 915         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 916         if (err)
 917                 return err;
 918         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 919
 920         /*
 921          * Caller doesn't know anything about obj_head_config,
 922          * so combine them together again before returning.
 923          */
 924         if (head_config)
 925                 list_splice_tail(&obj_head_config, head_config);
 926         return err;
 927 }
 928 #else // HAVE_LIBBPF_SUPPORT
 929 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 930                               struct list_head *list __maybe_unused,
 931                               struct bpf_object *obj __maybe_unused,
 932                               struct list_head *head_config __maybe_unused)
 933 {
 934         parse_events__handle_error(parse_state->error, 0,
 935                                    strdup("BPF support is not compiled"),
 936                                    strdup("Make sure libbpf-devel is available at build time."));
 937         return -ENOTSUP;
 938 }
 939
 940 int parse_events_load_bpf(struct parse_events_state *parse_state,
 941                           struct list_head *list __maybe_unused,
 942                           char *bpf_file_name __maybe_unused,
 943                           bool source __maybe_unused,
 944                           struct list_head *head_config __maybe_unused)
 945 {
 946         parse_events__handle_error(parse_state->error, 0,
 947                                    strdup("BPF support is not compiled"),
 948                                    strdup("Make sure libbpf-devel is available at build time."));
 949         return -ENOTSUP;
 950 }
 951 #endif // HAVE_LIBBPF_SUPPORT
 952
 953 static int
 954 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 955 {
 956         int i;
 957
 958         for (i = 0; i < 3; i++) {
 959                 if (!type || !type[i])
 960                         break;
 961
 962 #define CHECK_SET_TYPE(bit)             \
 963 do {                                    \
 964         if (attr->bp_type & bit)        \
 965                 return -EINVAL;         \
 966         else                            \
 967                 attr->bp_type |= bit;   \
 968 } while (0)
 969
 970                 switch (type[i]) {
 971                 case 'r':
 972                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 973                         break;
 974                 case 'w':
 975                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 976                         break;
 977                 case 'x':
 978                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 979                         break;
 980                 default:
 981                         return -EINVAL;
 982                 }
 983         }
 984
 985 #undef CHECK_SET_TYPE
 986
 987         if (!attr->bp_type) /* Default */
 988                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 989
 990         return 0;
 991 }
 992
 993 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 994                                 u64 addr, char *type, u64 len)
 995 {
 996         struct perf_event_attr attr;
 997
 998         memset(&attr, 0, sizeof(attr));
 999         attr.bp_addr = addr;
1000
1001         if (parse_breakpoint_type(type, &attr))
1002                 return -EINVAL;
1003
1004         /* Provide some defaults if len is not specified */
1005         if (!len) {
1006                 if (attr.bp_type == HW_BREAKPOINT_X)
1007                         len = sizeof(long);
1008                 else
1009                         len = HW_BREAKPOINT_LEN_4;
1010         }
1011
1012         attr.bp_len = len;
1013
1014         attr.type = PERF_TYPE_BREAKPOINT;
1015         attr.sample_period = 1;
1016
1017         return add_event(list, idx, &attr, NULL, NULL);
1018 }
1019
1020 static int check_type_val(struct parse_events_term *term,
1021                           struct parse_events_error *err,
1022                           int type)
1023 {
1024         if (type == term->type_val)
1025                 return 0;
1026
1027         if (err) {
1028                 parse_events__handle_error(err, term->err_val,
1029                                         type == PARSE_EVENTS__TERM_TYPE_NUM
1030                                         ? strdup("expected numeric value")
1031                                         : strdup("expected string value"),
1032                                         NULL);
1033         }
1034         return -EINVAL;
1035 }
1036
1037 /*
1038  * Update according to parse-events.l
1039  */
1040 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1041         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
1042         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
1043         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
1044         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
1045         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
1046         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
1047         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
1048         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
1049         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
1050         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
1051         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
1052         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
1053         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1054         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1055         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1056         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1057         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1058         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1059         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1060         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1061         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1062 };
1063
1064 static bool config_term_shrinked;
1065
1066 static bool
1067 config_term_avail(int term_type, struct parse_events_error *err)
1068 {
1069         char *err_str;
1070
1071         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1072                 parse_events__handle_error(err, -1,
1073                                         strdup("Invalid term_type"), NULL);
1074                 return false;
1075         }
1076         if (!config_term_shrinked)
1077                 return true;
1078
1079         switch (term_type) {
1080         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1081         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1082         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1083         case PARSE_EVENTS__TERM_TYPE_NAME:
1084         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1085         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1086                 return true;
1087         default:
1088                 if (!err)
1089                         return false;
1090
1091                 /* term_type is validated so indexing is safe */
1092                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1093                                 config_term_names[term_type]) >= 0)
1094                         parse_events__handle_error(err, -1, err_str, NULL);
1095                 return false;
1096         }
1097 }
1098
1099 void parse_events__shrink_config_terms(void)
1100 {
1101         config_term_shrinked = true;
1102 }
1103
1104 static int config_term_common(struct perf_event_attr *attr,
1105                               struct parse_events_term *term,
1106                               struct parse_events_error *err)
1107 {
1108 #define CHECK_TYPE_VAL(type)                                               \
1109 do {                                                                       \
1110         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1111                 return -EINVAL;                                            \
1112 } while (0)
1113
1114         switch (term->type_term) {
1115         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1116                 CHECK_TYPE_VAL(NUM);
1117                 attr->config = term->val.num;
1118                 break;
1119         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1120                 CHECK_TYPE_VAL(NUM);
1121                 attr->config1 = term->val.num;
1122                 break;
1123         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1124                 CHECK_TYPE_VAL(NUM);
1125                 attr->config2 = term->val.num;
1126                 break;
1127         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1128                 CHECK_TYPE_VAL(NUM);
1129                 break;
1130         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1131                 CHECK_TYPE_VAL(NUM);
1132                 break;
1133         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1134                 CHECK_TYPE_VAL(STR);
1135                 if (strcmp(term->val.str, "no") &&
1136                     parse_branch_str(term->val.str,
1137                                     &attr->branch_sample_type)) {
1138                         parse_events__handle_error(err, term->err_val,
1139                                         strdup("invalid branch sample type"),
1140                                         NULL);
1141                         return -EINVAL;
1142                 }
1143                 break;
1144         case PARSE_EVENTS__TERM_TYPE_TIME:
1145                 CHECK_TYPE_VAL(NUM);
1146                 if (term->val.num > 1) {
1147                         parse_events__handle_error(err, term->err_val,
1148                                                 strdup("expected 0 or 1"),
1149                                                 NULL);
1150                         return -EINVAL;
1151                 }
1152                 break;
1153         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1154                 CHECK_TYPE_VAL(STR);
1155                 break;
1156         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1157                 CHECK_TYPE_VAL(NUM);
1158                 break;
1159         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1160                 CHECK_TYPE_VAL(NUM);
1161                 break;
1162         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1163                 CHECK_TYPE_VAL(NUM);
1164                 break;
1165         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1166                 CHECK_TYPE_VAL(NUM);
1167                 break;
1168         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1169                 CHECK_TYPE_VAL(NUM);
1170                 break;
1171         case PARSE_EVENTS__TERM_TYPE_NAME:
1172                 CHECK_TYPE_VAL(STR);
1173                 break;
1174         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1175                 CHECK_TYPE_VAL(NUM);
1176                 break;
1177         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1178                 CHECK_TYPE_VAL(NUM);
1179                 break;
1180         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1181                 CHECK_TYPE_VAL(NUM);
1182                 if ((unsigned int)term->val.num > 1) {
1183                         parse_events__handle_error(err, term->err_val,
1184                                                 strdup("expected 0 or 1"),
1185                                                 NULL);
1186                         return -EINVAL;
1187                 }
1188                 break;
1189         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1190                 CHECK_TYPE_VAL(NUM);
1191                 break;
1192         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1193                 CHECK_TYPE_VAL(NUM);
1194                 if (term->val.num > UINT_MAX) {
1195                         parse_events__handle_error(err, term->err_val,
1196                                                 strdup("too big"),
1197                                                 NULL);
1198                         return -EINVAL;
1199                 }
1200                 break;
1201         default:
1202                 parse_events__handle_error(err, term->err_term,
1203                                 strdup("unknown term"),
1204                                 parse_events_formats_error_string(NULL));
1205                 return -EINVAL;
1206         }
1207
1208         /*
1209          * Check term availability after basic checking so
1210          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1211          *
1212          * If check availability at the entry of this function,
1213          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1214          * if an invalid config term is provided for legacy events
1215          * (for example, instructions/badterm/...), which is confusing.
1216          */
1217         if (!config_term_avail(term->type_term, err))
1218                 return -EINVAL;
1219         return 0;
1220 #undef CHECK_TYPE_VAL
1221 }
1222
1223 static int config_term_pmu(struct perf_event_attr *attr,
1224                            struct parse_events_term *term,
1225                            struct parse_events_error *err)
1226 {
1227         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1228             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1229                 /*
1230                  * Always succeed for sysfs terms, as we dont know
1231                  * at this point what type they need to have.
1232                  */
1233                 return 0;
1234         else
1235                 return config_term_common(attr, term, err);
1236 }
1237
1238 static int config_term_tracepoint(struct perf_event_attr *attr,
1239                                   struct parse_events_term *term,
1240                                   struct parse_events_error *err)
1241 {
1242         switch (term->type_term) {
1243         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1244         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1245         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1246         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1247         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1248         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1249         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1250         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1251         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1252         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1253                 return config_term_common(attr, term, err);
1254         default:
1255                 if (err) {
1256                         parse_events__handle_error(err, term->err_term,
1257                                 strdup("unknown term"),
1258                                 strdup("valid terms: call-graph,stack-size\n"));
1259                 }
1260                 return -EINVAL;
1261         }
1262
1263         return 0;
1264 }
1265
1266 static int config_attr(struct perf_event_attr *attr,
1267                        struct list_head *head,
1268                        struct parse_events_error *err,
1269                        config_term_func_t config_term)
1270 {
1271         struct parse_events_term *term;
1272
1273         list_for_each_entry(term, head, list)
1274                 if (config_term(attr, term, err))
1275                         return -EINVAL;
1276
1277         return 0;
1278 }
1279
1280 static int get_config_terms(struct list_head *head_config,
1281                             struct list_head *head_terms __maybe_unused)
1282 {
1283 #define ADD_CONFIG_TERM(__type, __weak)                         \
1284         struct evsel_config_term *__t;                  \
1285                                                                 \
1286         __t = zalloc(sizeof(*__t));                             \
1287         if (!__t)                                               \
1288                 return -ENOMEM;                                 \
1289                                                                 \
1290         INIT_LIST_HEAD(&__t->list);                             \
1291         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1292         __t->weak       = __weak;                               \
1293         list_add_tail(&__t->list, head_terms)
1294
1295 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1296 do {                                                            \
1297         ADD_CONFIG_TERM(__type, __weak);                        \
1298         __t->val.__name = __val;                                \
1299 } while (0)
1300
1301 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1302 do {                                                            \
1303         ADD_CONFIG_TERM(__type, __weak);                        \
1304         __t->val.str = strdup(__val);                           \
1305         if (!__t->val.str) {                                    \
1306                 zfree(&__t);                                    \
1307                 return -ENOMEM;                                 \
1308         }                                                       \
1309         __t->free_str = true;                                   \
1310 } while (0)
1311
1312         struct parse_events_term *term;
1313
1314         list_for_each_entry(term, head_config, list) {
1315                 switch (term->type_term) {
1316                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1317                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1318                         break;
1319                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1320                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1321                         break;
1322                 case PARSE_EVENTS__TERM_TYPE_TIME:
1323                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1324                         break;
1325                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1326                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1327                         break;
1328                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1329                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1330                         break;
1331                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1332                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1333                                             term->val.num, term->weak);
1334                         break;
1335                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1336                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1337                                             term->val.num ? 1 : 0, term->weak);
1338                         break;
1339                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1340                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1341                                             term->val.num ? 0 : 1, term->weak);
1342                         break;
1343                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1344                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1345                                             term->val.num, term->weak);
1346                         break;
1347                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1348                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1349                                             term->val.num, term->weak);
1350                         break;
1351                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1352                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1353                                             term->val.num ? 1 : 0, term->weak);
1354                         break;
1355                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1356                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1357                                             term->val.num ? 0 : 1, term->weak);
1358                         break;
1359                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1360                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1361                         break;
1362                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1363                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1364                                             term->val.num ? true : false, term->weak);
1365                         break;
1366                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1367                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1368                                             term->val.num ? 1 : 0, term->weak);
1369                         break;
1370                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1371                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1372                                             term->val.num, term->weak);
1373                         break;
1374                 default:
1375                         break;
1376                 }
1377         }
1378         return 0;
1379 }
1380
1381 /*
1382  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1383  * each bit of attr->config that the user has changed.
1384  */
1385 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1386                            struct list_head *head_terms)
1387 {
1388         struct parse_events_term *term;
1389         u64 bits = 0;
1390         int type;
1391
1392         list_for_each_entry(term, head_config, list) {
1393                 switch (term->type_term) {
1394                 case PARSE_EVENTS__TERM_TYPE_USER:
1395                         type = perf_pmu__format_type(&pmu->format, term->config);
1396                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1397                                 continue;
1398                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1399                         break;
1400                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1401                         bits = ~(u64)0;
1402                         break;
1403                 default:
1404                         break;
1405                 }
1406         }
1407
1408         if (bits)
1409                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1410
1411 #undef ADD_CONFIG_TERM
1412         return 0;
1413 }
1414
1415 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1416                                 const char *sys, const char *event,
1417                                 struct parse_events_error *err,
1418                                 struct list_head *head_config)
1419 {
1420         if (head_config) {
1421                 struct perf_event_attr attr;
1422
1423                 if (config_attr(&attr, head_config, err,
1424                                 config_term_tracepoint))
1425                         return -EINVAL;
1426         }
1427
1428         if (strpbrk(sys, "*?"))
1429                 return add_tracepoint_multi_sys(list, idx, sys, event,
1430                                                 err, head_config);
1431         else
1432                 return add_tracepoint_event(list, idx, sys, event,
1433                                             err, head_config);
1434 }
1435
1436 int parse_events_add_numeric(struct parse_events_state *parse_state,
1437                              struct list_head *list,
1438                              u32 type, u64 config,
1439                              struct list_head *head_config)
1440 {
1441         struct perf_event_attr attr;
1442         LIST_HEAD(config_terms);
1443         bool hybrid;
1444         int ret;
1445
1446         memset(&attr, 0, sizeof(attr));
1447         attr.type = type;
1448         attr.config = config;
1449
1450         if (head_config) {
1451                 if (config_attr(&attr, head_config, parse_state->error,
1452                                 config_term_common))
1453                         return -EINVAL;
1454
1455                 if (get_config_terms(head_config, &config_terms))
1456                         return -ENOMEM;
1457         }
1458
1459         ret = parse_events__add_numeric_hybrid(parse_state, list, &attr,
1460                                                get_config_name(head_config),
1461                                                &config_terms, &hybrid);
1462         if (hybrid)
1463                 goto out_free_terms;
1464
1465         ret = add_event(list, &parse_state->idx, &attr,
1466                         get_config_name(head_config), &config_terms);
1467 out_free_terms:
1468         free_config_terms(&config_terms);
1469         return ret;
1470 }
1471
1472 int parse_events_add_tool(struct parse_events_state *parse_state,
1473                           struct list_head *list,
1474                           enum perf_tool_event tool_event)
1475 {
1476         return add_event_tool(list, &parse_state->idx, tool_event);
1477 }
1478
1479 static bool config_term_percore(struct list_head *config_terms)
1480 {
1481         struct evsel_config_term *term;
1482
1483         list_for_each_entry(term, config_terms, list) {
1484                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1485                         return term->val.percore;
1486         }
1487
1488         return false;
1489 }
1490
1491 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state,
1492                                            struct list_head *list, char *name,
1493                                            struct list_head *head_config)
1494 {
1495         struct parse_events_term *term;
1496         int ret = -1;
1497
1498         if (parse_state->fake_pmu || !head_config || list_empty(head_config) ||
1499             !perf_pmu__is_hybrid(name)) {
1500                 return -1;
1501         }
1502
1503         /*
1504          * More than one term in list.
1505          */
1506         if (head_config->next && head_config->next->next != head_config)
1507                 return -1;
1508
1509         term = list_first_entry(head_config, struct parse_events_term, list);
1510         if (term && term->config && strcmp(term->config, "event")) {
1511                 ret = parse_events__with_hybrid_pmu(parse_state, term->config,
1512                                                     name, list);
1513         }
1514
1515         return ret;
1516 }
1517
1518 int parse_events_add_pmu(struct parse_events_state *parse_state,
1519                          struct list_head *list, char *name,
1520                          struct list_head *head_config,
1521                          bool auto_merge_stats,
1522                          bool use_alias)
1523 {
1524         struct perf_event_attr attr;
1525         struct perf_pmu_info info;
1526         struct perf_pmu *pmu;
1527         struct evsel *evsel;
1528         struct parse_events_error *err = parse_state->error;
1529         bool use_uncore_alias;
1530         LIST_HEAD(config_terms);
1531
1532         if (verbose > 1) {
1533                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1534                         name);
1535                 if (head_config) {
1536                         struct parse_events_term *term;
1537
1538                         list_for_each_entry(term, head_config, list) {
1539                                 fprintf(stderr, "%s,", term->config);
1540                         }
1541                 }
1542                 fprintf(stderr, "' that may result in non-fatal errors\n");
1543         }
1544
1545         pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1546         if (!pmu) {
1547                 char *err_str;
1548
1549                 if (asprintf(&err_str,
1550                                 "Cannot find PMU `%s'. Missing kernel support?",
1551                                 name) >= 0)
1552                         parse_events__handle_error(err, 0, err_str, NULL);
1553                 return -EINVAL;
1554         }
1555
1556         if (pmu->default_config) {
1557                 memcpy(&attr, pmu->default_config,
1558                        sizeof(struct perf_event_attr));
1559         } else {
1560                 memset(&attr, 0, sizeof(attr));
1561         }
1562
1563         use_uncore_alias = (pmu->is_uncore && use_alias);
1564
1565         if (!head_config) {
1566                 attr.type = pmu->type;
1567                 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1568                                     pmu, NULL, auto_merge_stats, NULL);
1569                 if (evsel) {
1570                         evsel->pmu_name = name ? strdup(name) : NULL;
1571                         evsel->use_uncore_alias = use_uncore_alias;
1572                         return 0;
1573                 } else {
1574                         return -ENOMEM;
1575                 }
1576         }
1577
1578         if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1579                 return -EINVAL;
1580
1581         if (verbose > 1) {
1582                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1583                         name);
1584                 if (head_config) {
1585                         struct parse_events_term *term;
1586
1587                         list_for_each_entry(term, head_config, list) {
1588                                 fprintf(stderr, "%s,", term->config);
1589                         }
1590                 }
1591                 fprintf(stderr, "' that may result in non-fatal errors\n");
1592         }
1593
1594         /*
1595          * Configure hardcoded terms first, no need to check
1596          * return value when called with fail == 0 ;)
1597          */
1598         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1599                 return -EINVAL;
1600
1601         if (get_config_terms(head_config, &config_terms))
1602                 return -ENOMEM;
1603
1604         /*
1605          * When using default config, record which bits of attr->config were
1606          * changed by the user.
1607          */
1608         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1609                 return -ENOMEM;
1610
1611         if (!parse_events__inside_hybrid_pmu(parse_state, list, name,
1612                                              head_config)) {
1613                 return 0;
1614         }
1615
1616         if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1617                 free_config_terms(&config_terms);
1618                 return -EINVAL;
1619         }
1620
1621         evsel = __add_event(list, &parse_state->idx, &attr, true,
1622                             get_config_name(head_config), pmu,
1623                             &config_terms, auto_merge_stats, NULL);
1624         if (!evsel)
1625                 return -ENOMEM;
1626
1627         if (evsel->name)
1628                 evsel->use_config_name = true;
1629
1630         evsel->pmu_name = name ? strdup(name) : NULL;
1631         evsel->use_uncore_alias = use_uncore_alias;
1632         evsel->percore = config_term_percore(&evsel->config_terms);
1633
1634         if (parse_state->fake_pmu)
1635                 return 0;
1636
1637         evsel->unit = info.unit;
1638         evsel->scale = info.scale;
1639         evsel->per_pkg = info.per_pkg;
1640         evsel->snapshot = info.snapshot;
1641         evsel->metric_expr = info.metric_expr;
1642         evsel->metric_name = info.metric_name;
1643         return 0;
1644 }
1645
1646 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1647                                char *str, struct list_head **listp)
1648 {
1649         struct parse_events_term *term;
1650         struct list_head *list;
1651         struct perf_pmu *pmu = NULL;
1652         int ok = 0;
1653
1654         *listp = NULL;
1655         /* Add it for all PMUs that support the alias */
1656         list = malloc(sizeof(struct list_head));
1657         if (!list)
1658                 return -1;
1659         INIT_LIST_HEAD(list);
1660         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1661                 struct perf_pmu_alias *alias;
1662
1663                 list_for_each_entry(alias, &pmu->aliases, list) {
1664                         if (!strcasecmp(alias->name, str)) {
1665                                 struct list_head *head;
1666                                 char *config;
1667
1668                                 head = malloc(sizeof(struct list_head));
1669                                 if (!head)
1670                                         return -1;
1671                                 INIT_LIST_HEAD(head);
1672                                 config = strdup(str);
1673                                 if (!config)
1674                                         return -1;
1675                                 if (parse_events_term__num(&term,
1676                                                    PARSE_EVENTS__TERM_TYPE_USER,
1677                                                    config, 1, false, &config,
1678                                                    NULL) < 0) {
1679                                         free(list);
1680                                         free(config);
1681                                         return -1;
1682                                 }
1683                                 list_add_tail(&term->list, head);
1684
1685                                 if (!parse_events_add_pmu(parse_state, list,
1686                                                           pmu->name, head,
1687                                                           true, true)) {
1688                                         pr_debug("%s -> %s/%s/\n", str,
1689                                                  pmu->name, alias->str);
1690                                         ok++;
1691                                 }
1692
1693                                 parse_events_terms__delete(head);
1694                         }
1695                 }
1696         }
1697         if (!ok) {
1698                 free(list);
1699                 return -1;
1700         }
1701         *listp = list;
1702         return 0;
1703 }
1704
1705 int parse_events__modifier_group(struct list_head *list,
1706                                  char *event_mod)
1707 {
1708         return parse_events__modifier_event(list, event_mod, true);
1709 }
1710
1711 /*
1712  * Check if the two uncore PMUs are from the same uncore block
1713  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1714  */
1715 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1716 {
1717         char *end_a, *end_b;
1718
1719         end_a = strrchr(pmu_name_a, '_');
1720         end_b = strrchr(pmu_name_b, '_');
1721
1722         if (!end_a || !end_b)
1723                 return false;
1724
1725         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1726                 return false;
1727
1728         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1729 }
1730
1731 static int
1732 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1733                                            struct parse_events_state *parse_state)
1734 {
1735         struct evsel *evsel, *leader;
1736         uintptr_t *leaders;
1737         bool is_leader = true;
1738         int i, nr_pmu = 0, total_members, ret = 0;
1739
1740         leader = list_first_entry(list, struct evsel, core.node);
1741         evsel = list_last_entry(list, struct evsel, core.node);
1742         total_members = evsel->core.idx - leader->core.idx + 1;
1743
1744         leaders = calloc(total_members, sizeof(uintptr_t));
1745         if (WARN_ON(!leaders))
1746                 return 0;
1747
1748         /*
1749          * Going through the whole group and doing sanity check.
1750          * All members must use alias, and be from the same uncore block.
1751          * Also, storing the leader events in an array.
1752          */
1753         __evlist__for_each_entry(list, evsel) {
1754
1755                 /* Only split the uncore group which members use alias */
1756                 if (!evsel->use_uncore_alias)
1757                         goto out;
1758
1759                 /* The events must be from the same uncore block */
1760                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1761                         goto out;
1762
1763                 if (!is_leader)
1764                         continue;
1765                 /*
1766                  * If the event's PMU name starts to repeat, it must be a new
1767                  * event. That can be used to distinguish the leader from
1768                  * other members, even they have the same event name.
1769                  */
1770                 if ((leader != evsel) &&
1771                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1772                         is_leader = false;
1773                         continue;
1774                 }
1775
1776                 /* Store the leader event for each PMU */
1777                 leaders[nr_pmu++] = (uintptr_t) evsel;
1778         }
1779
1780         /* only one event alias */
1781         if (nr_pmu == total_members) {
1782                 parse_state->nr_groups--;
1783                 goto handled;
1784         }
1785
1786         /*
1787          * An uncore event alias is a joint name which means the same event
1788          * runs on all PMUs of a block.
1789          * Perf doesn't support mixed events from different PMUs in the same
1790          * group. The big group has to be split into multiple small groups
1791          * which only include the events from the same PMU.
1792          *
1793          * Here the uncore event aliases must be from the same uncore block.
1794          * The number of PMUs must be same for each alias. The number of new
1795          * small groups equals to the number of PMUs.
1796          * Setting the leader event for corresponding members in each group.
1797          */
1798         i = 0;
1799         __evlist__for_each_entry(list, evsel) {
1800                 if (i >= nr_pmu)
1801                         i = 0;
1802                 evsel__set_leader(evsel, (struct evsel *) leaders[i++]);
1803         }
1804
1805         /* The number of members and group name are same for each group */
1806         for (i = 0; i < nr_pmu; i++) {
1807                 evsel = (struct evsel *) leaders[i];
1808                 evsel->core.nr_members = total_members / nr_pmu;
1809                 evsel->group_name = name ? strdup(name) : NULL;
1810         }
1811
1812         /* Take the new small groups into account */
1813         parse_state->nr_groups += nr_pmu - 1;
1814
1815 handled:
1816         ret = 1;
1817 out:
1818         free(leaders);
1819         return ret;
1820 }
1821
1822 void parse_events__set_leader(char *name, struct list_head *list,
1823                               struct parse_events_state *parse_state)
1824 {
1825         struct evsel *leader;
1826
1827         if (list_empty(list)) {
1828                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1829                 return;
1830         }
1831
1832         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1833                 return;
1834
1835         __perf_evlist__set_leader(list);
1836         leader = list_entry(list->next, struct evsel, core.node);
1837         leader->group_name = name ? strdup(name) : NULL;
1838 }
1839
1840 /* list_event is assumed to point to malloc'ed memory */
1841 void parse_events_update_lists(struct list_head *list_event,
1842                                struct list_head *list_all)
1843 {
1844         /*
1845          * Called for single event definition. Update the
1846          * 'all event' list, and reinit the 'single event'
1847          * list, for next event definition.
1848          */
1849         list_splice_tail(list_event, list_all);
1850         free(list_event);
1851 }
1852
1853 struct event_modifier {
1854         int eu;
1855         int ek;
1856         int eh;
1857         int eH;
1858         int eG;
1859         int eI;
1860         int precise;
1861         int precise_max;
1862         int exclude_GH;
1863         int sample_read;
1864         int pinned;
1865         int weak;
1866         int exclusive;
1867         int bpf_counter;
1868 };
1869
1870 static int get_event_modifier(struct event_modifier *mod, char *str,
1871                                struct evsel *evsel)
1872 {
1873         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1874         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1875         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1876         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1877         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1878         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1879         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1880         int precise_max = 0;
1881         int sample_read = 0;
1882         int pinned = evsel ? evsel->core.attr.pinned : 0;
1883         int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1884
1885         int exclude = eu | ek | eh;
1886         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1887         int weak = 0;
1888         int bpf_counter = 0;
1889
1890         memset(mod, 0, sizeof(*mod));
1891
1892         while (*str) {
1893                 if (*str == 'u') {
1894                         if (!exclude)
1895                                 exclude = eu = ek = eh = 1;
1896                         if (!exclude_GH && !perf_guest)
1897                                 eG = 1;
1898                         eu = 0;
1899                 } else if (*str == 'k') {
1900                         if (!exclude)
1901                                 exclude = eu = ek = eh = 1;
1902                         ek = 0;
1903                 } else if (*str == 'h') {
1904                         if (!exclude)
1905                                 exclude = eu = ek = eh = 1;
1906                         eh = 0;
1907                 } else if (*str == 'G') {
1908                         if (!exclude_GH)
1909                                 exclude_GH = eG = eH = 1;
1910                         eG = 0;
1911                 } else if (*str == 'H') {
1912                         if (!exclude_GH)
1913                                 exclude_GH = eG = eH = 1;
1914                         eH = 0;
1915                 } else if (*str == 'I') {
1916                         eI = 1;
1917                 } else if (*str == 'p') {
1918                         precise++;
1919                         /* use of precise requires exclude_guest */
1920                         if (!exclude_GH)
1921                                 eG = 1;
1922                 } else if (*str == 'P') {
1923                         precise_max = 1;
1924                 } else if (*str == 'S') {
1925                         sample_read = 1;
1926                 } else if (*str == 'D') {
1927                         pinned = 1;
1928                 } else if (*str == 'e') {
1929                         exclusive = 1;
1930                 } else if (*str == 'W') {
1931                         weak = 1;
1932                 } else if (*str == 'b') {
1933                         bpf_counter = 1;
1934                 } else
1935                         break;
1936
1937                 ++str;
1938         }
1939
1940         /*
1941          * precise ip:
1942          *
1943          *  0 - SAMPLE_IP can have arbitrary skid
1944          *  1 - SAMPLE_IP must have constant skid
1945          *  2 - SAMPLE_IP requested to have 0 skid
1946          *  3 - SAMPLE_IP must have 0 skid
1947          *
1948          *  See also PERF_RECORD_MISC_EXACT_IP
1949          */
1950         if (precise > 3)
1951                 return -EINVAL;
1952
1953         mod->eu = eu;
1954         mod->ek = ek;
1955         mod->eh = eh;
1956         mod->eH = eH;
1957         mod->eG = eG;
1958         mod->eI = eI;
1959         mod->precise = precise;
1960         mod->precise_max = precise_max;
1961         mod->exclude_GH = exclude_GH;
1962         mod->sample_read = sample_read;
1963         mod->pinned = pinned;
1964         mod->weak = weak;
1965         mod->bpf_counter = bpf_counter;
1966         mod->exclusive = exclusive;
1967
1968         return 0;
1969 }
1970
1971 /*
1972  * Basic modifier sanity check to validate it contains only one
1973  * instance of any modifier (apart from 'p') present.
1974  */
1975 static int check_modifier(char *str)
1976 {
1977         char *p = str;
1978
1979         /* The sizeof includes 0 byte as well. */
1980         if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1))
1981                 return -1;
1982
1983         while (*p) {
1984                 if (*p != 'p' && strchr(p + 1, *p))
1985                         return -1;
1986                 p++;
1987         }
1988
1989         return 0;
1990 }
1991
1992 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1993 {
1994         struct evsel *evsel;
1995         struct event_modifier mod;
1996
1997         if (str == NULL)
1998                 return 0;
1999
2000         if (check_modifier(str))
2001                 return -EINVAL;
2002
2003         if (!add && get_event_modifier(&mod, str, NULL))
2004                 return -EINVAL;
2005
2006         __evlist__for_each_entry(list, evsel) {
2007                 if (add && get_event_modifier(&mod, str, evsel))
2008                         return -EINVAL;
2009
2010                 evsel->core.attr.exclude_user   = mod.eu;
2011                 evsel->core.attr.exclude_kernel = mod.ek;
2012                 evsel->core.attr.exclude_hv     = mod.eh;
2013                 evsel->core.attr.precise_ip     = mod.precise;
2014                 evsel->core.attr.exclude_host   = mod.eH;
2015                 evsel->core.attr.exclude_guest  = mod.eG;
2016                 evsel->core.attr.exclude_idle   = mod.eI;
2017                 evsel->exclude_GH          = mod.exclude_GH;
2018                 evsel->sample_read         = mod.sample_read;
2019                 evsel->precise_max         = mod.precise_max;
2020                 evsel->weak_group          = mod.weak;
2021                 evsel->bpf_counter         = mod.bpf_counter;
2022
2023                 if (evsel__is_group_leader(evsel)) {
2024                         evsel->core.attr.pinned = mod.pinned;
2025                         evsel->core.attr.exclusive = mod.exclusive;
2026                 }
2027         }
2028
2029         return 0;
2030 }
2031
2032 int parse_events_name(struct list_head *list, char *name)
2033 {
2034         struct evsel *evsel;
2035
2036         __evlist__for_each_entry(list, evsel) {
2037                 if (!evsel->name)
2038                         evsel->name = strdup(name);
2039         }
2040
2041         return 0;
2042 }
2043
2044 static int
2045 comp_pmu(const void *p1, const void *p2)
2046 {
2047         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
2048         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
2049
2050         return strcasecmp(pmu1->symbol, pmu2->symbol);
2051 }
2052
2053 static void perf_pmu__parse_cleanup(void)
2054 {
2055         if (perf_pmu_events_list_num > 0) {
2056                 struct perf_pmu_event_symbol *p;
2057                 int i;
2058
2059                 for (i = 0; i < perf_pmu_events_list_num; i++) {
2060                         p = perf_pmu_events_list + i;
2061                         zfree(&p->symbol);
2062                 }
2063                 zfree(&perf_pmu_events_list);
2064                 perf_pmu_events_list_num = 0;
2065         }
2066 }
2067
2068 #define SET_SYMBOL(str, stype)          \
2069 do {                                    \
2070         p->symbol = str;                \
2071         if (!p->symbol)                 \
2072                 goto err;               \
2073         p->type = stype;                \
2074 } while (0)
2075
2076 /*
2077  * Read the pmu events list from sysfs
2078  * Save it into perf_pmu_events_list
2079  */
2080 static void perf_pmu__parse_init(void)
2081 {
2082
2083         struct perf_pmu *pmu = NULL;
2084         struct perf_pmu_alias *alias;
2085         int len = 0;
2086
2087         pmu = NULL;
2088         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2089                 list_for_each_entry(alias, &pmu->aliases, list) {
2090                         if (strchr(alias->name, '-'))
2091                                 len++;
2092                         len++;
2093                 }
2094         }
2095
2096         if (len == 0) {
2097                 perf_pmu_events_list_num = -1;
2098                 return;
2099         }
2100         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2101         if (!perf_pmu_events_list)
2102                 return;
2103         perf_pmu_events_list_num = len;
2104
2105         len = 0;
2106         pmu = NULL;
2107         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2108                 list_for_each_entry(alias, &pmu->aliases, list) {
2109                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2110                         char *tmp = strchr(alias->name, '-');
2111
2112                         if (tmp != NULL) {
2113                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2114                                                 PMU_EVENT_SYMBOL_PREFIX);
2115                                 p++;
2116                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2117                                 len += 2;
2118                         } else {
2119                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2120                                 len++;
2121                         }
2122                 }
2123         }
2124         qsort(perf_pmu_events_list, len,
2125                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2126
2127         return;
2128 err:
2129         perf_pmu__parse_cleanup();
2130 }
2131
2132 /*
2133  * This function injects special term in
2134  * perf_pmu_events_list so the test code
2135  * can check on this functionality.
2136  */
2137 int perf_pmu__test_parse_init(void)
2138 {
2139         struct perf_pmu_event_symbol *list;
2140
2141         list = malloc(sizeof(*list) * 1);
2142         if (!list)
2143                 return -ENOMEM;
2144
2145         list->type   = PMU_EVENT_SYMBOL;
2146         list->symbol = strdup("read");
2147
2148         if (!list->symbol) {
2149                 free(list);
2150                 return -ENOMEM;
2151         }
2152
2153         perf_pmu_events_list = list;
2154         perf_pmu_events_list_num = 1;
2155         return 0;
2156 }
2157
2158 enum perf_pmu_event_symbol_type
2159 perf_pmu__parse_check(const char *name)
2160 {
2161         struct perf_pmu_event_symbol p, *r;
2162
2163         /* scan kernel pmu events from sysfs if needed */
2164         if (perf_pmu_events_list_num == 0)
2165                 perf_pmu__parse_init();
2166         /*
2167          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2168          * cpu-cycles has been handled by hardcode.
2169          * So it must be cpu// events, not kernel pmu event.
2170          */
2171         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2172                 return PMU_EVENT_SYMBOL_ERR;
2173
2174         p.symbol = strdup(name);
2175         r = bsearch(&p, perf_pmu_events_list,
2176                         (size_t) perf_pmu_events_list_num,
2177                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2178         zfree(&p.symbol);
2179         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2180 }
2181
2182 static int parse_events__scanner(const char *str,
2183                                  struct parse_events_state *parse_state)
2184 {
2185         YY_BUFFER_STATE buffer;
2186         void *scanner;
2187         int ret;
2188
2189         ret = parse_events_lex_init_extra(parse_state, &scanner);
2190         if (ret)
2191                 return ret;
2192
2193         buffer = parse_events__scan_string(str, scanner);
2194
2195 #ifdef PARSER_DEBUG
2196         parse_events_debug = 1;
2197         parse_events_set_debug(1, scanner);
2198 #endif
2199         ret = parse_events_parse(parse_state, scanner);
2200
2201         parse_events__flush_buffer(buffer, scanner);
2202         parse_events__delete_buffer(buffer, scanner);
2203         parse_events_lex_destroy(scanner);
2204         return ret;
2205 }
2206
2207 /*
2208  * parse event config string, return a list of event terms.
2209  */
2210 int parse_events_terms(struct list_head *terms, const char *str)
2211 {
2212         struct parse_events_state parse_state = {
2213                 .terms  = NULL,
2214                 .stoken = PE_START_TERMS,
2215         };
2216         int ret;
2217
2218         ret = parse_events__scanner(str, &parse_state);
2219         perf_pmu__parse_cleanup();
2220
2221         if (!ret) {
2222                 list_splice(parse_state.terms, terms);
2223                 zfree(&parse_state.terms);
2224                 return 0;
2225         }
2226
2227         parse_events_terms__delete(parse_state.terms);
2228         return ret;
2229 }
2230
2231 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
2232                                          const char *str, char *pmu_name,
2233                                          struct list_head *list)
2234 {
2235         struct parse_events_state ps = {
2236                 .list            = LIST_HEAD_INIT(ps.list),
2237                 .stoken          = PE_START_EVENTS,
2238                 .hybrid_pmu_name = pmu_name,
2239                 .idx             = parse_state->idx,
2240         };
2241         int ret;
2242
2243         ret = parse_events__scanner(str, &ps);
2244         perf_pmu__parse_cleanup();
2245
2246         if (!ret) {
2247                 if (!list_empty(&ps.list)) {
2248                         list_splice(&ps.list, list);
2249                         parse_state->idx = ps.idx;
2250                         return 0;
2251                 } else
2252                         return -1;
2253         }
2254
2255         return ret;
2256 }
2257
2258 int __parse_events(struct evlist *evlist, const char *str,
2259                    struct parse_events_error *err, struct perf_pmu *fake_pmu)
2260 {
2261         struct parse_events_state parse_state = {
2262                 .list     = LIST_HEAD_INIT(parse_state.list),
2263                 .idx      = evlist->core.nr_entries,
2264                 .error    = err,
2265                 .evlist   = evlist,
2266                 .stoken   = PE_START_EVENTS,
2267                 .fake_pmu = fake_pmu,
2268         };
2269         int ret;
2270
2271         ret = parse_events__scanner(str, &parse_state);
2272         perf_pmu__parse_cleanup();
2273
2274         if (!ret && list_empty(&parse_state.list)) {
2275                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2276                 return -1;
2277         }
2278
2279         /*
2280          * Add list to the evlist even with errors to allow callers to clean up.
2281          */
2282         evlist__splice_list_tail(evlist, &parse_state.list);
2283
2284         if (!ret) {
2285                 struct evsel *last;
2286
2287                 evlist->core.nr_groups += parse_state.nr_groups;
2288                 last = evlist__last(evlist);
2289                 last->cmdline_group_boundary = true;
2290
2291                 return 0;
2292         }
2293
2294         /*
2295          * There are 2 users - builtin-record and builtin-test objects.
2296          * Both call evlist__delete in case of error, so we dont
2297          * need to bother.
2298          */
2299         return ret;
2300 }
2301
2302 #define MAX_WIDTH 1000
2303 static int get_term_width(void)
2304 {
2305         struct winsize ws;
2306
2307         get_term_dimensions(&ws);
2308         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2309 }
2310
2311 static void __parse_events_print_error(int err_idx, const char *err_str,
2312                                 const char *err_help, const char *event)
2313 {
2314         const char *str = "invalid or unsupported event: ";
2315         char _buf[MAX_WIDTH];
2316         char *buf = (char *) event;
2317         int idx = 0;
2318         if (err_str) {
2319                 /* -2 for extra '' in the final fprintf */
2320                 int width       = get_term_width() - 2;
2321                 int len_event   = strlen(event);
2322                 int len_str, max_len, cut = 0;
2323
2324                 /*
2325                  * Maximum error index indent, we will cut
2326                  * the event string if it's bigger.
2327                  */
2328                 int max_err_idx = 13;
2329
2330                 /*
2331                  * Let's be specific with the message when
2332                  * we have the precise error.
2333                  */
2334                 str     = "event syntax error: ";
2335                 len_str = strlen(str);
2336                 max_len = width - len_str;
2337
2338                 buf = _buf;
2339
2340                 /* We're cutting from the beginning. */
2341                 if (err_idx > max_err_idx)
2342                         cut = err_idx - max_err_idx;
2343
2344                 strncpy(buf, event + cut, max_len);
2345
2346                 /* Mark cut parts with '..' on both sides. */
2347                 if (cut)
2348                         buf[0] = buf[1] = '.';
2349
2350                 if ((len_event - cut) > max_len) {
2351                         buf[max_len - 1] = buf[max_len - 2] = '.';
2352                         buf[max_len] = 0;
2353                 }
2354
2355                 idx = len_str + err_idx - cut;
2356         }
2357
2358         fprintf(stderr, "%s'%s'\n", str, buf);
2359         if (idx) {
2360                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2361                 if (err_help)
2362                         fprintf(stderr, "\n%s\n", err_help);
2363         }
2364 }
2365
2366 void parse_events_print_error(struct parse_events_error *err,
2367                               const char *event)
2368 {
2369         if (!err->num_errors)
2370                 return;
2371
2372         __parse_events_print_error(err->idx, err->str, err->help, event);
2373         zfree(&err->str);
2374         zfree(&err->help);
2375
2376         if (err->num_errors > 1) {
2377                 fputs("\nInitial error:\n", stderr);
2378                 __parse_events_print_error(err->first_idx, err->first_str,
2379                                         err->first_help, event);
2380                 zfree(&err->first_str);
2381                 zfree(&err->first_help);
2382         }
2383 }
2384
2385 #undef MAX_WIDTH
2386
2387 int parse_events_option(const struct option *opt, const char *str,
2388                         int unset __maybe_unused)
2389 {
2390         struct evlist *evlist = *(struct evlist **)opt->value;
2391         struct parse_events_error err;
2392         int ret;
2393
2394         bzero(&err, sizeof(err));
2395         ret = parse_events(evlist, str, &err);
2396
2397         if (ret) {
2398                 parse_events_print_error(&err, str);
2399                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2400         }
2401
2402         return ret;
2403 }
2404
2405 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2406 {
2407         struct evlist **evlistp = opt->value;
2408         int ret;
2409
2410         if (*evlistp == NULL) {
2411                 *evlistp = evlist__new();
2412
2413                 if (*evlistp == NULL) {
2414                         fprintf(stderr, "Not enough memory to create evlist\n");
2415                         return -1;
2416                 }
2417         }
2418
2419         ret = parse_events_option(opt, str, unset);
2420         if (ret) {
2421                 evlist__delete(*evlistp);
2422                 *evlistp = NULL;
2423         }
2424
2425         return ret;
2426 }
2427
2428 static int
2429 foreach_evsel_in_last_glob(struct evlist *evlist,
2430                            int (*func)(struct evsel *evsel,
2431                                        const void *arg),
2432                            const void *arg)
2433 {
2434         struct evsel *last = NULL;
2435         int err;
2436
2437         /*
2438          * Don't return when list_empty, give func a chance to report
2439          * error when it found last == NULL.
2440          *
2441          * So no need to WARN here, let *func do this.
2442          */
2443         if (evlist->core.nr_entries > 0)
2444                 last = evlist__last(evlist);
2445
2446         do {
2447                 err = (*func)(last, arg);
2448                 if (err)
2449                         return -1;
2450                 if (!last)
2451                         return 0;
2452
2453                 if (last->core.node.prev == &evlist->core.entries)
2454                         return 0;
2455                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2456         } while (!last->cmdline_group_boundary);
2457
2458         return 0;
2459 }
2460
2461 static int set_filter(struct evsel *evsel, const void *arg)
2462 {
2463         const char *str = arg;
2464         bool found = false;
2465         int nr_addr_filters = 0;
2466         struct perf_pmu *pmu = NULL;
2467
2468         if (evsel == NULL) {
2469                 fprintf(stderr,
2470                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2471                 return -1;
2472         }
2473
2474         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2475                 if (evsel__append_tp_filter(evsel, str) < 0) {
2476                         fprintf(stderr,
2477                                 "not enough memory to hold filter string\n");
2478                         return -1;
2479                 }
2480
2481                 return 0;
2482         }
2483
2484         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2485                 if (pmu->type == evsel->core.attr.type) {
2486                         found = true;
2487                         break;
2488                 }
2489
2490         if (found)
2491                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2492                                     "%d", &nr_addr_filters);
2493
2494         if (!nr_addr_filters) {
2495                 fprintf(stderr,
2496                         "This CPU does not support address filtering\n");
2497                 return -1;
2498         }
2499
2500         if (evsel__append_addr_filter(evsel, str) < 0) {
2501                 fprintf(stderr,
2502                         "not enough memory to hold filter string\n");
2503                 return -1;
2504         }
2505
2506         return 0;
2507 }
2508
2509 int parse_filter(const struct option *opt, const char *str,
2510                  int unset __maybe_unused)
2511 {
2512         struct evlist *evlist = *(struct evlist **)opt->value;
2513
2514         return foreach_evsel_in_last_glob(evlist, set_filter,
2515                                           (const void *)str);
2516 }
2517
2518 static int add_exclude_perf_filter(struct evsel *evsel,
2519                                    const void *arg __maybe_unused)
2520 {
2521         char new_filter[64];
2522
2523         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2524                 fprintf(stderr,
2525                         "--exclude-perf option should follow a -e tracepoint option\n");
2526                 return -1;
2527         }
2528
2529         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2530
2531         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2532                 fprintf(stderr,
2533                         "not enough memory to hold filter string\n");
2534                 return -1;
2535         }
2536
2537         return 0;
2538 }
2539
2540 int exclude_perf(const struct option *opt,
2541                  const char *arg __maybe_unused,
2542                  int unset __maybe_unused)
2543 {
2544         struct evlist *evlist = *(struct evlist **)opt->value;
2545
2546         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2547                                           NULL);
2548 }
2549
2550 static const char * const event_type_descriptors[] = {
2551         "Hardware event",
2552         "Software event",
2553         "Tracepoint event",
2554         "Hardware cache event",
2555         "Raw hardware event descriptor",
2556         "Hardware breakpoint",
2557 };
2558
2559 static int cmp_string(const void *a, const void *b)
2560 {
2561         const char * const *as = a;
2562         const char * const *bs = b;
2563
2564         return strcmp(*as, *bs);
2565 }
2566
2567 /*
2568  * Print the events from <debugfs_mount_point>/tracing/events
2569  */
2570
2571 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2572                              bool name_only)
2573 {
2574         DIR *sys_dir, *evt_dir;
2575         struct dirent *sys_dirent, *evt_dirent;
2576         char evt_path[MAXPATHLEN];
2577         char *dir_path;
2578         char **evt_list = NULL;
2579         unsigned int evt_i = 0, evt_num = 0;
2580         bool evt_num_known = false;
2581
2582 restart:
2583         sys_dir = tracing_events__opendir();
2584         if (!sys_dir)
2585                 return;
2586
2587         if (evt_num_known) {
2588                 evt_list = zalloc(sizeof(char *) * evt_num);
2589                 if (!evt_list)
2590                         goto out_close_sys_dir;
2591         }
2592
2593         for_each_subsystem(sys_dir, sys_dirent) {
2594                 if (subsys_glob != NULL &&
2595                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2596                         continue;
2597
2598                 dir_path = get_events_file(sys_dirent->d_name);
2599                 if (!dir_path)
2600                         continue;
2601                 evt_dir = opendir(dir_path);
2602                 if (!evt_dir)
2603                         goto next;
2604
2605                 for_each_event(dir_path, evt_dir, evt_dirent) {
2606                         if (event_glob != NULL &&
2607                             !strglobmatch(evt_dirent->d_name, event_glob))
2608                                 continue;
2609
2610                         if (!evt_num_known) {
2611                                 evt_num++;
2612                                 continue;
2613                         }
2614
2615                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2616                                  sys_dirent->d_name, evt_dirent->d_name);
2617
2618                         evt_list[evt_i] = strdup(evt_path);
2619                         if (evt_list[evt_i] == NULL) {
2620                                 put_events_file(dir_path);
2621                                 goto out_close_evt_dir;
2622                         }
2623                         evt_i++;
2624                 }
2625                 closedir(evt_dir);
2626 next:
2627                 put_events_file(dir_path);
2628         }
2629         closedir(sys_dir);
2630
2631         if (!evt_num_known) {
2632                 evt_num_known = true;
2633                 goto restart;
2634         }
2635         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2636         evt_i = 0;
2637         while (evt_i < evt_num) {
2638                 if (name_only) {
2639                         printf("%s ", evt_list[evt_i++]);
2640                         continue;
2641                 }
2642                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2643                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2644         }
2645         if (evt_num && pager_in_use())
2646                 printf("\n");
2647
2648 out_free:
2649         evt_num = evt_i;
2650         for (evt_i = 0; evt_i < evt_num; evt_i++)
2651                 zfree(&evt_list[evt_i]);
2652         zfree(&evt_list);
2653         return;
2654
2655 out_close_evt_dir:
2656         closedir(evt_dir);
2657 out_close_sys_dir:
2658         closedir(sys_dir);
2659
2660         printf("FATAL: not enough memory to print %s\n",
2661                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2662         if (evt_list)
2663                 goto out_free;
2664 }
2665
2666 /*
2667  * Check whether event is in <debugfs_mount_point>/tracing/events
2668  */
2669
2670 int is_valid_tracepoint(const char *event_string)
2671 {
2672         DIR *sys_dir, *evt_dir;
2673         struct dirent *sys_dirent, *evt_dirent;
2674         char evt_path[MAXPATHLEN];
2675         char *dir_path;
2676
2677         sys_dir = tracing_events__opendir();
2678         if (!sys_dir)
2679                 return 0;
2680
2681         for_each_subsystem(sys_dir, sys_dirent) {
2682                 dir_path = get_events_file(sys_dirent->d_name);
2683                 if (!dir_path)
2684                         continue;
2685                 evt_dir = opendir(dir_path);
2686                 if (!evt_dir)
2687                         goto next;
2688
2689                 for_each_event(dir_path, evt_dir, evt_dirent) {
2690                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2691                                  sys_dirent->d_name, evt_dirent->d_name);
2692                         if (!strcmp(evt_path, event_string)) {
2693                                 closedir(evt_dir);
2694                                 closedir(sys_dir);
2695                                 return 1;
2696                         }
2697                 }
2698                 closedir(evt_dir);
2699 next:
2700                 put_events_file(dir_path);
2701         }
2702         closedir(sys_dir);
2703         return 0;
2704 }
2705
2706 static bool is_event_supported(u8 type, unsigned config)
2707 {
2708         bool ret = true;
2709         int open_return;
2710         struct evsel *evsel;
2711         struct perf_event_attr attr = {
2712                 .type = type,
2713                 .config = config,
2714                 .disabled = 1,
2715         };
2716         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2717
2718         if (tmap == NULL)
2719                 return false;
2720
2721         evsel = evsel__new(&attr);
2722         if (evsel) {
2723                 open_return = evsel__open(evsel, NULL, tmap);
2724                 ret = open_return >= 0;
2725
2726                 if (open_return == -EACCES) {
2727                         /*
2728                          * This happens if the paranoid value
2729                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2730                          * Re-run with exclude_kernel set; we don't do that
2731                          * by default as some ARM machines do not support it.
2732                          *
2733                          */
2734                         evsel->core.attr.exclude_kernel = 1;
2735                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2736                 }
2737                 evsel__delete(evsel);
2738         }
2739
2740         perf_thread_map__put(tmap);
2741         return ret;
2742 }
2743
2744 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2745                       bool name_only)
2746 {
2747         struct probe_cache *pcache;
2748         struct probe_cache_entry *ent;
2749         struct strlist *bidlist, *sdtlist;
2750         struct strlist_config cfg = {.dont_dupstr = true};
2751         struct str_node *nd, *nd2;
2752         char *buf, *path, *ptr = NULL;
2753         bool show_detail = false;
2754         int ret;
2755
2756         sdtlist = strlist__new(NULL, &cfg);
2757         if (!sdtlist) {
2758                 pr_debug("Failed to allocate new strlist for SDT\n");
2759                 return;
2760         }
2761         bidlist = build_id_cache__list_all(true);
2762         if (!bidlist) {
2763                 pr_debug("Failed to get buildids: %d\n", errno);
2764                 return;
2765         }
2766         strlist__for_each_entry(nd, bidlist) {
2767                 pcache = probe_cache__new(nd->s, NULL);
2768                 if (!pcache)
2769                         continue;
2770                 list_for_each_entry(ent, &pcache->entries, node) {
2771                         if (!ent->sdt)
2772                                 continue;
2773                         if (subsys_glob &&
2774                             !strglobmatch(ent->pev.group, subsys_glob))
2775                                 continue;
2776                         if (event_glob &&
2777                             !strglobmatch(ent->pev.event, event_glob))
2778                                 continue;
2779                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2780                                         ent->pev.event, nd->s);
2781                         if (ret > 0)
2782                                 strlist__add(sdtlist, buf);
2783                 }
2784                 probe_cache__delete(pcache);
2785         }
2786         strlist__delete(bidlist);
2787
2788         strlist__for_each_entry(nd, sdtlist) {
2789                 buf = strchr(nd->s, '@');
2790                 if (buf)
2791                         *(buf++) = '\0';
2792                 if (name_only) {
2793                         printf("%s ", nd->s);
2794                         continue;
2795                 }
2796                 nd2 = strlist__next(nd);
2797                 if (nd2) {
2798                         ptr = strchr(nd2->s, '@');
2799                         if (ptr)
2800                                 *ptr = '\0';
2801                         if (strcmp(nd->s, nd2->s) == 0)
2802                                 show_detail = true;
2803                 }
2804                 if (show_detail) {
2805                         path = build_id_cache__origname(buf);
2806                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2807                         if (ret > 0) {
2808                                 printf("  %-50s [%s]\n", buf, "SDT event");
2809                                 free(buf);
2810                         }
2811                         free(path);
2812                 } else
2813                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2814                 if (nd2) {
2815                         if (strcmp(nd->s, nd2->s) != 0)
2816                                 show_detail = false;
2817                         if (ptr)
2818                                 *ptr = '@';
2819                 }
2820         }
2821         strlist__delete(sdtlist);
2822 }
2823
2824 int print_hwcache_events(const char *event_glob, bool name_only)
2825 {
2826         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2827         char name[64];
2828         char **evt_list = NULL;
2829         bool evt_num_known = false;
2830
2831 restart:
2832         if (evt_num_known) {
2833                 evt_list = zalloc(sizeof(char *) * evt_num);
2834                 if (!evt_list)
2835                         goto out_enomem;
2836         }
2837
2838         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2839                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2840                         /* skip invalid cache type */
2841                         if (!evsel__is_cache_op_valid(type, op))
2842                                 continue;
2843
2844                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2845                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2846                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2847                                         continue;
2848
2849                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2850                                                         type | (op << 8) | (i << 16)))
2851                                         continue;
2852
2853                                 if (!evt_num_known) {
2854                                         evt_num++;
2855                                         continue;
2856                                 }
2857
2858                                 evt_list[evt_i] = strdup(name);
2859                                 if (evt_list[evt_i] == NULL)
2860                                         goto out_enomem;
2861                                 evt_i++;
2862                         }
2863                 }
2864         }
2865
2866         if (!evt_num_known) {
2867                 evt_num_known = true;
2868                 goto restart;
2869         }
2870         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2871         evt_i = 0;
2872         while (evt_i < evt_num) {
2873                 if (name_only) {
2874                         printf("%s ", evt_list[evt_i++]);
2875                         continue;
2876                 }
2877                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2878                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2879         }
2880         if (evt_num && pager_in_use())
2881                 printf("\n");
2882
2883 out_free:
2884         evt_num = evt_i;
2885         for (evt_i = 0; evt_i < evt_num; evt_i++)
2886                 zfree(&evt_list[evt_i]);
2887         zfree(&evt_list);
2888         return evt_num;
2889
2890 out_enomem:
2891         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2892         if (evt_list)
2893                 goto out_free;
2894         return evt_num;
2895 }
2896
2897 static void print_tool_event(const char *name, const char *event_glob,
2898                              bool name_only)
2899 {
2900         if (event_glob && !strglobmatch(name, event_glob))
2901                 return;
2902         if (name_only)
2903                 printf("%s ", name);
2904         else
2905                 printf("  %-50s [%s]\n", name, "Tool event");
2906
2907 }
2908
2909 void print_tool_events(const char *event_glob, bool name_only)
2910 {
2911         print_tool_event("duration_time", event_glob, name_only);
2912         if (pager_in_use())
2913                 printf("\n");
2914 }
2915
2916 void print_symbol_events(const char *event_glob, unsigned type,
2917                                 struct event_symbol *syms, unsigned max,
2918                                 bool name_only)
2919 {
2920         unsigned int i, evt_i = 0, evt_num = 0;
2921         char name[MAX_NAME_LEN];
2922         char **evt_list = NULL;
2923         bool evt_num_known = false;
2924
2925 restart:
2926         if (evt_num_known) {
2927                 evt_list = zalloc(sizeof(char *) * evt_num);
2928                 if (!evt_list)
2929                         goto out_enomem;
2930                 syms -= max;
2931         }
2932
2933         for (i = 0; i < max; i++, syms++) {
2934                 /*
2935                  * New attr.config still not supported here, the latest
2936                  * example was PERF_COUNT_SW_CGROUP_SWITCHES
2937                  */
2938                 if (syms->symbol == NULL)
2939                         continue;
2940
2941                 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
2942                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2943                         continue;
2944
2945                 if (!is_event_supported(type, i))
2946                         continue;
2947
2948                 if (!evt_num_known) {
2949                         evt_num++;
2950                         continue;
2951                 }
2952
2953                 if (!name_only && strlen(syms->alias))
2954                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2955                 else
2956                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2957
2958                 evt_list[evt_i] = strdup(name);
2959                 if (evt_list[evt_i] == NULL)
2960                         goto out_enomem;
2961                 evt_i++;
2962         }
2963
2964         if (!evt_num_known) {
2965                 evt_num_known = true;
2966                 goto restart;
2967         }
2968         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2969         evt_i = 0;
2970         while (evt_i < evt_num) {
2971                 if (name_only) {
2972                         printf("%s ", evt_list[evt_i++]);
2973                         continue;
2974                 }
2975                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2976         }
2977         if (evt_num && pager_in_use())
2978                 printf("\n");
2979
2980 out_free:
2981         evt_num = evt_i;
2982         for (evt_i = 0; evt_i < evt_num; evt_i++)
2983                 zfree(&evt_list[evt_i]);
2984         zfree(&evt_list);
2985         return;
2986
2987 out_enomem:
2988         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2989         if (evt_list)
2990                 goto out_free;
2991 }
2992
2993 /*
2994  * Print the help text for the event symbols:
2995  */
2996 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2997                         bool long_desc, bool details_flag, bool deprecated)
2998 {
2999         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
3000                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
3001
3002         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
3003                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
3004         print_tool_events(event_glob, name_only);
3005
3006         print_hwcache_events(event_glob, name_only);
3007
3008         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
3009                         details_flag, deprecated);
3010
3011         if (event_glob != NULL)
3012                 return;
3013
3014         if (!name_only) {
3015                 printf("  %-50s [%s]\n",
3016                        "rNNN",
3017                        event_type_descriptors[PERF_TYPE_RAW]);
3018                 printf("  %-50s [%s]\n",
3019                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
3020                        event_type_descriptors[PERF_TYPE_RAW]);
3021                 if (pager_in_use())
3022                         printf("   (see 'man perf-list' on how to encode it)\n\n");
3023
3024                 printf("  %-50s [%s]\n",
3025                        "mem:<addr>[/len][:access]",
3026                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
3027                 if (pager_in_use())
3028                         printf("\n");
3029         }
3030
3031         print_tracepoint_events(NULL, NULL, name_only);
3032
3033         print_sdt_events(NULL, NULL, name_only);
3034
3035         metricgroup__print(true, true, NULL, name_only, details_flag);
3036
3037         print_libpfm_events(name_only, long_desc);
3038 }
3039
3040 int parse_events__is_hardcoded_term(struct parse_events_term *term)
3041 {
3042         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
3043 }
3044
3045 static int new_term(struct parse_events_term **_term,
3046                     struct parse_events_term *temp,
3047                     char *str, u64 num)
3048 {
3049         struct parse_events_term *term;
3050
3051         term = malloc(sizeof(*term));
3052         if (!term)
3053                 return -ENOMEM;
3054
3055         *term = *temp;
3056         INIT_LIST_HEAD(&term->list);
3057         term->weak = false;
3058
3059         switch (term->type_val) {
3060         case PARSE_EVENTS__TERM_TYPE_NUM:
3061                 term->val.num = num;
3062                 break;
3063         case PARSE_EVENTS__TERM_TYPE_STR:
3064                 term->val.str = str;
3065                 break;
3066         default:
3067                 free(term);
3068                 return -EINVAL;
3069         }
3070
3071         *_term = term;
3072         return 0;
3073 }
3074
3075 int parse_events_term__num(struct parse_events_term **term,
3076                            int type_term, char *config, u64 num,
3077                            bool no_value,
3078                            void *loc_term_, void *loc_val_)
3079 {
3080         YYLTYPE *loc_term = loc_term_;
3081         YYLTYPE *loc_val = loc_val_;
3082
3083         struct parse_events_term temp = {
3084                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
3085                 .type_term = type_term,
3086                 .config    = config,
3087                 .no_value  = no_value,
3088                 .err_term  = loc_term ? loc_term->first_column : 0,
3089                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3090         };
3091
3092         return new_term(term, &temp, NULL, num);
3093 }
3094
3095 int parse_events_term__str(struct parse_events_term **term,
3096                            int type_term, char *config, char *str,
3097                            void *loc_term_, void *loc_val_)
3098 {
3099         YYLTYPE *loc_term = loc_term_;
3100         YYLTYPE *loc_val = loc_val_;
3101
3102         struct parse_events_term temp = {
3103                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3104                 .type_term = type_term,
3105                 .config    = config,
3106                 .err_term  = loc_term ? loc_term->first_column : 0,
3107                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3108         };
3109
3110         return new_term(term, &temp, str, 0);
3111 }
3112
3113 int parse_events_term__sym_hw(struct parse_events_term **term,
3114                               char *config, unsigned idx)
3115 {
3116         struct event_symbol *sym;
3117         char *str;
3118         struct parse_events_term temp = {
3119                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3120                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3121                 .config    = config,
3122         };
3123
3124         if (!temp.config) {
3125                 temp.config = strdup("event");
3126                 if (!temp.config)
3127                         return -ENOMEM;
3128         }
3129         BUG_ON(idx >= PERF_COUNT_HW_MAX);
3130         sym = &event_symbols_hw[idx];
3131
3132         str = strdup(sym->symbol);
3133         if (!str)
3134                 return -ENOMEM;
3135         return new_term(term, &temp, str, 0);
3136 }
3137
3138 int parse_events_term__clone(struct parse_events_term **new,
3139                              struct parse_events_term *term)
3140 {
3141         char *str;
3142         struct parse_events_term temp = {
3143                 .type_val  = term->type_val,
3144                 .type_term = term->type_term,
3145                 .config    = NULL,
3146                 .err_term  = term->err_term,
3147                 .err_val   = term->err_val,
3148         };
3149
3150         if (term->config) {
3151                 temp.config = strdup(term->config);
3152                 if (!temp.config)
3153                         return -ENOMEM;
3154         }
3155         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3156                 return new_term(new, &temp, NULL, term->val.num);
3157
3158         str = strdup(term->val.str);
3159         if (!str)
3160                 return -ENOMEM;
3161         return new_term(new, &temp, str, 0);
3162 }
3163
3164 void parse_events_term__delete(struct parse_events_term *term)
3165 {
3166         if (term->array.nr_ranges)
3167                 zfree(&term->array.ranges);
3168
3169         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3170                 zfree(&term->val.str);
3171
3172         zfree(&term->config);
3173         free(term);
3174 }
3175
3176 int parse_events_copy_term_list(struct list_head *old,
3177                                  struct list_head **new)
3178 {
3179         struct parse_events_term *term, *n;
3180         int ret;
3181
3182         if (!old) {
3183                 *new = NULL;
3184                 return 0;
3185         }
3186
3187         *new = malloc(sizeof(struct list_head));
3188         if (!*new)
3189                 return -ENOMEM;
3190         INIT_LIST_HEAD(*new);
3191
3192         list_for_each_entry (term, old, list) {
3193                 ret = parse_events_term__clone(&n, term);
3194                 if (ret)
3195                         return ret;
3196                 list_add_tail(&n->list, *new);
3197         }
3198         return 0;
3199 }
3200
3201 void parse_events_terms__purge(struct list_head *terms)
3202 {
3203         struct parse_events_term *term, *h;
3204
3205         list_for_each_entry_safe(term, h, terms, list) {
3206                 list_del_init(&term->list);
3207                 parse_events_term__delete(term);
3208         }
3209 }
3210
3211 void parse_events_terms__delete(struct list_head *terms)
3212 {
3213         if (!terms)
3214                 return;
3215         parse_events_terms__purge(terms);
3216         free(terms);
3217 }
3218
3219 void parse_events__clear_array(struct parse_events_array *a)
3220 {
3221         zfree(&a->ranges);
3222 }
3223
3224 void parse_events_evlist_error(struct parse_events_state *parse_state,
3225                                int idx, const char *str)
3226 {
3227         if (!parse_state->error)
3228                 return;
3229
3230         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3231 }
3232
3233 static void config_terms_list(char *buf, size_t buf_sz)
3234 {
3235         int i;
3236         bool first = true;
3237
3238         buf[0] = '\0';
3239         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3240                 const char *name = config_term_names[i];
3241
3242                 if (!config_term_avail(i, NULL))
3243                         continue;
3244                 if (!name)
3245                         continue;
3246                 if (name[0] == '<')
3247                         continue;
3248
3249                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3250                         return;
3251
3252                 if (!first)
3253                         strcat(buf, ",");
3254                 else
3255                         first = false;
3256                 strcat(buf, name);
3257         }
3258 }
3259
3260 /*
3261  * Return string contains valid config terms of an event.
3262  * @additional_terms: For terms such as PMU sysfs terms.
3263  */
3264 char *parse_events_formats_error_string(char *additional_terms)
3265 {
3266         char *str;
3267         /* "no-overwrite" is the longest name */
3268         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3269                           (sizeof("no-overwrite") - 1)];
3270
3271         config_terms_list(static_terms, sizeof(static_terms));
3272         /* valid terms */
3273         if (additional_terms) {
3274                 if (asprintf(&str, "valid terms: %s,%s",
3275                              additional_terms, static_terms) < 0)
3276                         goto fail;
3277         } else {
3278                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3279                         goto fail;
3280         }
3281         return str;
3282
3283 fail:
3284         return NULL;
3285 }
3286
3287 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx,
3288                                              struct perf_event_attr *attr,
3289                                              char *name, struct perf_pmu *pmu,
3290                                              struct list_head *config_terms)
3291 {
3292         return __add_event(list, idx, attr, true, name, pmu,
3293                            config_terms, false, NULL);
3294 }