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(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                 return ret;
 539
 540         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 541 }
 542
 543 static void tracepoint_error(struct parse_events_error *e, int err,
 544                              const char *sys, const char *name)
 545 {
 546         const char *str;
 547         char help[BUFSIZ];
 548
 549         if (!e)
 550                 return;
 551
 552         /*
 553          * We get error directly from syscall errno ( > 0),
 554          * or from encoded pointer's error ( < 0).
 555          */
 556         err = abs(err);
 557
 558         switch (err) {
 559         case EACCES:
 560                 str = "can't access trace events";
 561                 break;
 562         case ENOENT:
 563                 str = "unknown tracepoint";
 564                 break;
 565         default:
 566                 str = "failed to add tracepoint";
 567                 break;
 568         }
 569
 570         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 571         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 572 }
 573
 574 static int add_tracepoint(struct list_head *list, int *idx,
 575                           const char *sys_name, const char *evt_name,
 576                           struct parse_events_error *err,
 577                           struct list_head *head_config)
 578 {
 579         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 580
 581         if (IS_ERR(evsel)) {
 582                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 583                 return PTR_ERR(evsel);
 584         }
 585
 586         if (head_config) {
 587                 LIST_HEAD(config_terms);
 588
 589                 if (get_config_terms(head_config, &config_terms))
 590                         return -ENOMEM;
 591                 list_splice(&config_terms, &evsel->config_terms);
 592         }
 593
 594         list_add_tail(&evsel->core.node, list);
 595         return 0;
 596 }
 597
 598 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 599                                       const char *sys_name, const char *evt_name,
 600                                       struct parse_events_error *err,
 601                                       struct list_head *head_config)
 602 {
 603         char *evt_path;
 604         struct dirent *evt_ent;
 605         DIR *evt_dir;
 606         int ret = 0, found = 0;
 607
 608         evt_path = get_events_file(sys_name);
 609         if (!evt_path) {
 610                 tracepoint_error(err, errno, sys_name, evt_name);
 611                 return -1;
 612         }
 613         evt_dir = opendir(evt_path);
 614         if (!evt_dir) {
 615                 put_events_file(evt_path);
 616                 tracepoint_error(err, errno, sys_name, evt_name);
 617                 return -1;
 618         }
 619
 620         while (!ret && (evt_ent = readdir(evt_dir))) {
 621                 if (!strcmp(evt_ent->d_name, ".")
 622                     || !strcmp(evt_ent->d_name, "..")
 623                     || !strcmp(evt_ent->d_name, "enable")
 624                     || !strcmp(evt_ent->d_name, "filter"))
 625                         continue;
 626
 627                 if (!strglobmatch(evt_ent->d_name, evt_name))
 628                         continue;
 629
 630                 found++;
 631
 632                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 633                                      err, head_config);
 634         }
 635
 636         if (!found) {
 637                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 638                 ret = -1;
 639         }
 640
 641         put_events_file(evt_path);
 642         closedir(evt_dir);
 643         return ret;
 644 }
 645
 646 static int add_tracepoint_event(struct list_head *list, int *idx,
 647                                 const char *sys_name, const char *evt_name,
 648                                 struct parse_events_error *err,
 649                                 struct list_head *head_config)
 650 {
 651         return strpbrk(evt_name, "*?") ?
 652                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 653                                           err, head_config) :
 654                add_tracepoint(list, idx, sys_name, evt_name,
 655                               err, head_config);
 656 }
 657
 658 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 659                                     const char *sys_name, const char *evt_name,
 660                                     struct parse_events_error *err,
 661                                     struct list_head *head_config)
 662 {
 663         struct dirent *events_ent;
 664         DIR *events_dir;
 665         int ret = 0;
 666
 667         events_dir = tracing_events__opendir();
 668         if (!events_dir) {
 669                 tracepoint_error(err, errno, sys_name, evt_name);
 670                 return -1;
 671         }
 672
 673         while (!ret && (events_ent = readdir(events_dir))) {
 674                 if (!strcmp(events_ent->d_name, ".")
 675                     || !strcmp(events_ent->d_name, "..")
 676                     || !strcmp(events_ent->d_name, "enable")
 677                     || !strcmp(events_ent->d_name, "header_event")
 678                     || !strcmp(events_ent->d_name, "header_page"))
 679                         continue;
 680
 681                 if (!strglobmatch(events_ent->d_name, sys_name))
 682                         continue;
 683
 684                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 685                                            evt_name, err, head_config);
 686         }
 687
 688         closedir(events_dir);
 689         return ret;
 690 }
 691
 692 #ifdef HAVE_LIBBPF_SUPPORT
 693 struct __add_bpf_event_param {
 694         struct parse_events_state *parse_state;
 695         struct list_head *list;
 696         struct list_head *head_config;
 697 };
 698
 699 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 700                          void *_param)
 701 {
 702         LIST_HEAD(new_evsels);
 703         struct __add_bpf_event_param *param = _param;
 704         struct parse_events_state *parse_state = param->parse_state;
 705         struct list_head *list = param->list;
 706         struct evsel *pos;
 707         int err;
 708         /*
 709          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 710          * then don't add the tracepoint, this will be used for something else, like
 711          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 712          *
 713          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 714          */
 715         if (group[0] == '!')
 716                 return 0;
 717
 718         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 719                  group, event, fd);
 720
 721         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 722                                           event, parse_state->error,
 723                                           param->head_config);
 724         if (err) {
 725                 struct evsel *evsel, *tmp;
 726
 727                 pr_debug("Failed to add BPF event %s:%s\n",
 728                          group, event);
 729                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 730                         list_del_init(&evsel->core.node);
 731                         evsel__delete(evsel);
 732                 }
 733                 return err;
 734         }
 735         pr_debug("adding %s:%s\n", group, event);
 736
 737         list_for_each_entry(pos, &new_evsels, core.node) {
 738                 pr_debug("adding %s:%s to %p\n",
 739                          group, event, pos);
 740                 pos->bpf_fd = fd;
 741                 pos->bpf_obj = obj;
 742         }
 743         list_splice(&new_evsels, list);
 744         return 0;
 745 }
 746
 747 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 748                               struct list_head *list,
 749                               struct bpf_object *obj,
 750                               struct list_head *head_config)
 751 {
 752         int err;
 753         char errbuf[BUFSIZ];
 754         struct __add_bpf_event_param param = {parse_state, list, head_config};
 755         static bool registered_unprobe_atexit = false;
 756
 757         if (IS_ERR(obj) || !obj) {
 758                 snprintf(errbuf, sizeof(errbuf),
 759                          "Internal error: load bpf obj with NULL");
 760                 err = -EINVAL;
 761                 goto errout;
 762         }
 763
 764         /*
 765          * Register atexit handler before calling bpf__probe() so
 766          * bpf__probe() don't need to unprobe probe points its already
 767          * created when failure.
 768          */
 769         if (!registered_unprobe_atexit) {
 770                 atexit(bpf__clear);
 771                 registered_unprobe_atexit = true;
 772         }
 773
 774         err = bpf__probe(obj);
 775         if (err) {
 776                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 777                 goto errout;
 778         }
 779
 780         err = bpf__load(obj);
 781         if (err) {
 782                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 783                 goto errout;
 784         }
 785
 786         err = bpf__foreach_event(obj, add_bpf_event, &param);
 787         if (err) {
 788                 snprintf(errbuf, sizeof(errbuf),
 789                          "Attach events in BPF object failed");
 790                 goto errout;
 791         }
 792
 793         return 0;
 794 errout:
 795         parse_events__handle_error(parse_state->error, 0,
 796                                 strdup(errbuf), strdup("(add -v to see detail)"));
 797         return err;
 798 }
 799
 800 static int
 801 parse_events_config_bpf(struct parse_events_state *parse_state,
 802                         struct bpf_object *obj,
 803                         struct list_head *head_config)
 804 {
 805         struct parse_events_term *term;
 806         int error_pos;
 807
 808         if (!head_config || list_empty(head_config))
 809                 return 0;
 810
 811         list_for_each_entry(term, head_config, list) {
 812                 int err;
 813
 814                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 815                         parse_events__handle_error(parse_state->error, term->err_term,
 816                                                 strdup("Invalid config term for BPF object"),
 817                                                 NULL);
 818                         return -EINVAL;
 819                 }
 820
 821                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 822                 if (err) {
 823                         char errbuf[BUFSIZ];
 824                         int idx;
 825
 826                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 827                                                  &error_pos, err, errbuf,
 828                                                  sizeof(errbuf));
 829
 830                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 831                                 idx = term->err_val;
 832                         else
 833                                 idx = term->err_term + error_pos;
 834
 835                         parse_events__handle_error(parse_state->error, idx,
 836                                                 strdup(errbuf),
 837                                                 strdup(
 838 "Hint:\tValid config terms:\n"
 839 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 840 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 841 "\n"
 842 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 843 "     \t(add -v to see detail)"));
 844                         return err;
 845                 }
 846         }
 847         return 0;
 848 }
 849
 850 /*
 851  * Split config terms:
 852  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 853  *  'call-graph=fp' is 'evt config', should be applied to each
 854  *  events in bpf.c.
 855  * 'map:array.value[0]=1' is 'obj config', should be processed
 856  * with parse_events_config_bpf.
 857  *
 858  * Move object config terms from the first list to obj_head_config.
 859  */
 860 static void
 861 split_bpf_config_terms(struct list_head *evt_head_config,
 862                        struct list_head *obj_head_config)
 863 {
 864         struct parse_events_term *term, *temp;
 865
 866         /*
 867          * Currently, all possible user config term
 868          * belong to bpf object. parse_events__is_hardcoded_term()
 869          * happens to be a good flag.
 870          *
 871          * See parse_events_config_bpf() and
 872          * config_term_tracepoint().
 873          */
 874         list_for_each_entry_safe(term, temp, evt_head_config, list)
 875                 if (!parse_events__is_hardcoded_term(term))
 876                         list_move_tail(&term->list, obj_head_config);
 877 }
 878
 879 int parse_events_load_bpf(struct parse_events_state *parse_state,
 880                           struct list_head *list,
 881                           char *bpf_file_name,
 882                           bool source,
 883                           struct list_head *head_config)
 884 {
 885         int err;
 886         struct bpf_object *obj;
 887         LIST_HEAD(obj_head_config);
 888
 889         if (head_config)
 890                 split_bpf_config_terms(head_config, &obj_head_config);
 891
 892         obj = bpf__prepare_load(bpf_file_name, source);
 893         if (IS_ERR(obj)) {
 894                 char errbuf[BUFSIZ];
 895
 896                 err = PTR_ERR(obj);
 897
 898                 if (err == -ENOTSUP)
 899                         snprintf(errbuf, sizeof(errbuf),
 900                                  "BPF support is not compiled");
 901                 else
 902                         bpf__strerror_prepare_load(bpf_file_name,
 903                                                    source,
 904                                                    -err, errbuf,
 905                                                    sizeof(errbuf));
 906
 907                 parse_events__handle_error(parse_state->error, 0,
 908                                         strdup(errbuf), strdup("(add -v to see detail)"));
 909                 return err;
 910         }
 911
 912         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 913         if (err)
 914                 return err;
 915         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 916
 917         /*
 918          * Caller doesn't know anything about obj_head_config,
 919          * so combine them together again before returning.
 920          */
 921         if (head_config)
 922                 list_splice_tail(&obj_head_config, head_config);
 923         return err;
 924 }
 925 #else // HAVE_LIBBPF_SUPPORT
 926 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 927                               struct list_head *list __maybe_unused,
 928                               struct bpf_object *obj __maybe_unused,
 929                               struct list_head *head_config __maybe_unused)
 930 {
 931         parse_events__handle_error(parse_state->error, 0,
 932                                    strdup("BPF support is not compiled"),
 933                                    strdup("Make sure libbpf-devel is available at build time."));
 934         return -ENOTSUP;
 935 }
 936
 937 int parse_events_load_bpf(struct parse_events_state *parse_state,
 938                           struct list_head *list __maybe_unused,
 939                           char *bpf_file_name __maybe_unused,
 940                           bool source __maybe_unused,
 941                           struct list_head *head_config __maybe_unused)
 942 {
 943         parse_events__handle_error(parse_state->error, 0,
 944                                    strdup("BPF support is not compiled"),
 945                                    strdup("Make sure libbpf-devel is available at build time."));
 946         return -ENOTSUP;
 947 }
 948 #endif // HAVE_LIBBPF_SUPPORT
 949
 950 static int
 951 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 952 {
 953         int i;
 954
 955         for (i = 0; i < 3; i++) {
 956                 if (!type || !type[i])
 957                         break;
 958
 959 #define CHECK_SET_TYPE(bit)             \
 960 do {                                    \
 961         if (attr->bp_type & bit)        \
 962                 return -EINVAL;         \
 963         else                            \
 964                 attr->bp_type |= bit;   \
 965 } while (0)
 966
 967                 switch (type[i]) {
 968                 case 'r':
 969                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 970                         break;
 971                 case 'w':
 972                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 973                         break;
 974                 case 'x':
 975                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 976                         break;
 977                 default:
 978                         return -EINVAL;
 979                 }
 980         }
 981
 982 #undef CHECK_SET_TYPE
 983
 984         if (!attr->bp_type) /* Default */
 985                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 986
 987         return 0;
 988 }
 989
 990 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 991                                 u64 addr, char *type, u64 len)
 992 {
 993         struct perf_event_attr attr;
 994
 995         memset(&attr, 0, sizeof(attr));
 996         attr.bp_addr = addr;
 997
 998         if (parse_breakpoint_type(type, &attr))
 999                 return -EINVAL;
1000
1001         /* Provide some defaults if len is not specified */
1002         if (!len) {
1003                 if (attr.bp_type == HW_BREAKPOINT_X)
1004                         len = sizeof(long);
1005                 else
1006                         len = HW_BREAKPOINT_LEN_4;
1007         }
1008
1009         attr.bp_len = len;
1010
1011         attr.type = PERF_TYPE_BREAKPOINT;
1012         attr.sample_period = 1;
1013
1014         return add_event(list, idx, &attr, NULL, NULL);
1015 }
1016
1017 static int check_type_val(struct parse_events_term *term,
1018                           struct parse_events_error *err,
1019                           int type)
1020 {
1021         if (type == term->type_val)
1022                 return 0;
1023
1024         if (err) {
1025                 parse_events__handle_error(err, term->err_val,
1026                                         type == PARSE_EVENTS__TERM_TYPE_NUM
1027                                         ? strdup("expected numeric value")
1028                                         : strdup("expected string value"),
1029                                         NULL);
1030         }
1031         return -EINVAL;
1032 }
1033
1034 /*
1035  * Update according to parse-events.l
1036  */
1037 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1038         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
1039         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
1040         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
1041         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
1042         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
1043         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
1044         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
1045         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
1046         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
1047         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
1048         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
1049         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
1050         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1051         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1052         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1053         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1054         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1055         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1056         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1057         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1058         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1059 };
1060
1061 static bool config_term_shrinked;
1062
1063 static bool
1064 config_term_avail(int term_type, struct parse_events_error *err)
1065 {
1066         char *err_str;
1067
1068         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1069                 parse_events__handle_error(err, -1,
1070                                         strdup("Invalid term_type"), NULL);
1071                 return false;
1072         }
1073         if (!config_term_shrinked)
1074                 return true;
1075
1076         switch (term_type) {
1077         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1078         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1079         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1080         case PARSE_EVENTS__TERM_TYPE_NAME:
1081         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1082         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1083                 return true;
1084         default:
1085                 if (!err)
1086                         return false;
1087
1088                 /* term_type is validated so indexing is safe */
1089                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1090                                 config_term_names[term_type]) >= 0)
1091                         parse_events__handle_error(err, -1, err_str, NULL);
1092                 return false;
1093         }
1094 }
1095
1096 void parse_events__shrink_config_terms(void)
1097 {
1098         config_term_shrinked = true;
1099 }
1100
1101 static int config_term_common(struct perf_event_attr *attr,
1102                               struct parse_events_term *term,
1103                               struct parse_events_error *err)
1104 {
1105 #define CHECK_TYPE_VAL(type)                                               \
1106 do {                                                                       \
1107         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1108                 return -EINVAL;                                            \
1109 } while (0)
1110
1111         switch (term->type_term) {
1112         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1113                 CHECK_TYPE_VAL(NUM);
1114                 attr->config = term->val.num;
1115                 break;
1116         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1117                 CHECK_TYPE_VAL(NUM);
1118                 attr->config1 = term->val.num;
1119                 break;
1120         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1121                 CHECK_TYPE_VAL(NUM);
1122                 attr->config2 = term->val.num;
1123                 break;
1124         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1125                 CHECK_TYPE_VAL(NUM);
1126                 break;
1127         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1128                 CHECK_TYPE_VAL(NUM);
1129                 break;
1130         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1131                 CHECK_TYPE_VAL(STR);
1132                 if (strcmp(term->val.str, "no") &&
1133                     parse_branch_str(term->val.str,
1134                                     &attr->branch_sample_type)) {
1135                         parse_events__handle_error(err, term->err_val,
1136                                         strdup("invalid branch sample type"),
1137                                         NULL);
1138                         return -EINVAL;
1139                 }
1140                 break;
1141         case PARSE_EVENTS__TERM_TYPE_TIME:
1142                 CHECK_TYPE_VAL(NUM);
1143                 if (term->val.num > 1) {
1144                         parse_events__handle_error(err, term->err_val,
1145                                                 strdup("expected 0 or 1"),
1146                                                 NULL);
1147                         return -EINVAL;
1148                 }
1149                 break;
1150         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1151                 CHECK_TYPE_VAL(STR);
1152                 break;
1153         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1154                 CHECK_TYPE_VAL(NUM);
1155                 break;
1156         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1157                 CHECK_TYPE_VAL(NUM);
1158                 break;
1159         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1160                 CHECK_TYPE_VAL(NUM);
1161                 break;
1162         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1163                 CHECK_TYPE_VAL(NUM);
1164                 break;
1165         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1166                 CHECK_TYPE_VAL(NUM);
1167                 break;
1168         case PARSE_EVENTS__TERM_TYPE_NAME:
1169                 CHECK_TYPE_VAL(STR);
1170                 break;
1171         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1172                 CHECK_TYPE_VAL(NUM);
1173                 break;
1174         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1175                 CHECK_TYPE_VAL(NUM);
1176                 break;
1177         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1178                 CHECK_TYPE_VAL(NUM);
1179                 if ((unsigned int)term->val.num > 1) {
1180                         parse_events__handle_error(err, term->err_val,
1181                                                 strdup("expected 0 or 1"),
1182                                                 NULL);
1183                         return -EINVAL;
1184                 }
1185                 break;
1186         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1187                 CHECK_TYPE_VAL(NUM);
1188                 break;
1189         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1190                 CHECK_TYPE_VAL(NUM);
1191                 if (term->val.num > UINT_MAX) {
1192                         parse_events__handle_error(err, term->err_val,
1193                                                 strdup("too big"),
1194                                                 NULL);
1195                         return -EINVAL;
1196                 }
1197                 break;
1198         default:
1199                 parse_events__handle_error(err, term->err_term,
1200                                 strdup("unknown term"),
1201                                 parse_events_formats_error_string(NULL));
1202                 return -EINVAL;
1203         }
1204
1205         /*
1206          * Check term availability after basic checking so
1207          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1208          *
1209          * If check availability at the entry of this function,
1210          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1211          * if an invalid config term is provided for legacy events
1212          * (for example, instructions/badterm/...), which is confusing.
1213          */
1214         if (!config_term_avail(term->type_term, err))
1215                 return -EINVAL;
1216         return 0;
1217 #undef CHECK_TYPE_VAL
1218 }
1219
1220 static int config_term_pmu(struct perf_event_attr *attr,
1221                            struct parse_events_term *term,
1222                            struct parse_events_error *err)
1223 {
1224         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1225             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1226                 /*
1227                  * Always succeed for sysfs terms, as we dont know
1228                  * at this point what type they need to have.
1229                  */
1230                 return 0;
1231         else
1232                 return config_term_common(attr, term, err);
1233 }
1234
1235 static int config_term_tracepoint(struct perf_event_attr *attr,
1236                                   struct parse_events_term *term,
1237                                   struct parse_events_error *err)
1238 {
1239         switch (term->type_term) {
1240         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1241         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1242         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1243         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1244         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1245         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1246         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1247         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1248         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1249         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1250                 return config_term_common(attr, term, err);
1251         default:
1252                 if (err) {
1253                         parse_events__handle_error(err, term->err_term,
1254                                 strdup("unknown term"),
1255                                 strdup("valid terms: call-graph,stack-size\n"));
1256                 }
1257                 return -EINVAL;
1258         }
1259
1260         return 0;
1261 }
1262
1263 static int config_attr(struct perf_event_attr *attr,
1264                        struct list_head *head,
1265                        struct parse_events_error *err,
1266                        config_term_func_t config_term)
1267 {
1268         struct parse_events_term *term;
1269
1270         list_for_each_entry(term, head, list)
1271                 if (config_term(attr, term, err))
1272                         return -EINVAL;
1273
1274         return 0;
1275 }
1276
1277 static int get_config_terms(struct list_head *head_config,
1278                             struct list_head *head_terms __maybe_unused)
1279 {
1280 #define ADD_CONFIG_TERM(__type, __weak)                         \
1281         struct evsel_config_term *__t;                  \
1282                                                                 \
1283         __t = zalloc(sizeof(*__t));                             \
1284         if (!__t)                                               \
1285                 return -ENOMEM;                                 \
1286                                                                 \
1287         INIT_LIST_HEAD(&__t->list);                             \
1288         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1289         __t->weak       = __weak;                               \
1290         list_add_tail(&__t->list, head_terms)
1291
1292 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1293 do {                                                            \
1294         ADD_CONFIG_TERM(__type, __weak);                        \
1295         __t->val.__name = __val;                                \
1296 } while (0)
1297
1298 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1299 do {                                                            \
1300         ADD_CONFIG_TERM(__type, __weak);                        \
1301         __t->val.str = strdup(__val);                           \
1302         if (!__t->val.str) {                                    \
1303                 zfree(&__t);                                    \
1304                 return -ENOMEM;                                 \
1305         }                                                       \
1306         __t->free_str = true;                                   \
1307 } while (0)
1308
1309         struct parse_events_term *term;
1310
1311         list_for_each_entry(term, head_config, list) {
1312                 switch (term->type_term) {
1313                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1314                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1315                         break;
1316                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1317                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1318                         break;
1319                 case PARSE_EVENTS__TERM_TYPE_TIME:
1320                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1321                         break;
1322                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1323                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1324                         break;
1325                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1326                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1327                         break;
1328                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1329                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1330                                             term->val.num, term->weak);
1331                         break;
1332                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1333                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1334                                             term->val.num ? 1 : 0, term->weak);
1335                         break;
1336                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1337                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1338                                             term->val.num ? 0 : 1, term->weak);
1339                         break;
1340                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1341                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1342                                             term->val.num, term->weak);
1343                         break;
1344                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1345                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1346                                             term->val.num, term->weak);
1347                         break;
1348                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1349                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1350                                             term->val.num ? 1 : 0, term->weak);
1351                         break;
1352                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1353                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1354                                             term->val.num ? 0 : 1, term->weak);
1355                         break;
1356                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1357                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1358                         break;
1359                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1360                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1361                                             term->val.num ? true : false, term->weak);
1362                         break;
1363                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1364                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1365                                             term->val.num ? 1 : 0, term->weak);
1366                         break;
1367                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1368                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1369                                             term->val.num, term->weak);
1370                         break;
1371                 default:
1372                         break;
1373                 }
1374         }
1375         return 0;
1376 }
1377
1378 /*
1379  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1380  * each bit of attr->config that the user has changed.
1381  */
1382 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1383                            struct list_head *head_terms)
1384 {
1385         struct parse_events_term *term;
1386         u64 bits = 0;
1387         int type;
1388
1389         list_for_each_entry(term, head_config, list) {
1390                 switch (term->type_term) {
1391                 case PARSE_EVENTS__TERM_TYPE_USER:
1392                         type = perf_pmu__format_type(&pmu->format, term->config);
1393                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1394                                 continue;
1395                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1396                         break;
1397                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1398                         bits = ~(u64)0;
1399                         break;
1400                 default:
1401                         break;
1402                 }
1403         }
1404
1405         if (bits)
1406                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1407
1408 #undef ADD_CONFIG_TERM
1409         return 0;
1410 }
1411
1412 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1413                                 const char *sys, const char *event,
1414                                 struct parse_events_error *err,
1415                                 struct list_head *head_config)
1416 {
1417         if (head_config) {
1418                 struct perf_event_attr attr;
1419
1420                 if (config_attr(&attr, head_config, err,
1421                                 config_term_tracepoint))
1422                         return -EINVAL;
1423         }
1424
1425         if (strpbrk(sys, "*?"))
1426                 return add_tracepoint_multi_sys(list, idx, sys, event,
1427                                                 err, head_config);
1428         else
1429                 return add_tracepoint_event(list, idx, sys, event,
1430                                             err, head_config);
1431 }
1432
1433 int parse_events_add_numeric(struct parse_events_state *parse_state,
1434                              struct list_head *list,
1435                              u32 type, u64 config,
1436                              struct list_head *head_config)
1437 {
1438         struct perf_event_attr attr;
1439         LIST_HEAD(config_terms);
1440         bool hybrid;
1441         int ret;
1442
1443         memset(&attr, 0, sizeof(attr));
1444         attr.type = type;
1445         attr.config = config;
1446
1447         if (head_config) {
1448                 if (config_attr(&attr, head_config, parse_state->error,
1449                                 config_term_common))
1450                         return -EINVAL;
1451
1452                 if (get_config_terms(head_config, &config_terms))
1453                         return -ENOMEM;
1454         }
1455
1456         ret = parse_events__add_numeric_hybrid(parse_state, list, &attr,
1457                                                get_config_name(head_config),
1458                                                &config_terms, &hybrid);
1459         if (hybrid)
1460                 return ret;
1461
1462         return add_event(list, &parse_state->idx, &attr,
1463                          get_config_name(head_config), &config_terms);
1464 }
1465
1466 int parse_events_add_tool(struct parse_events_state *parse_state,
1467                           struct list_head *list,
1468                           enum perf_tool_event tool_event)
1469 {
1470         return add_event_tool(list, &parse_state->idx, tool_event);
1471 }
1472
1473 static bool config_term_percore(struct list_head *config_terms)
1474 {
1475         struct evsel_config_term *term;
1476
1477         list_for_each_entry(term, config_terms, list) {
1478                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1479                         return term->val.percore;
1480         }
1481
1482         return false;
1483 }
1484
1485 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state,
1486                                            struct list_head *list, char *name,
1487                                            struct list_head *head_config)
1488 {
1489         struct parse_events_term *term;
1490         int ret = -1;
1491
1492         if (parse_state->fake_pmu || !head_config || list_empty(head_config) ||
1493             !perf_pmu__is_hybrid(name)) {
1494                 return -1;
1495         }
1496
1497         /*
1498          * More than one term in list.
1499          */
1500         if (head_config->next && head_config->next->next != head_config)
1501                 return -1;
1502
1503         term = list_first_entry(head_config, struct parse_events_term, list);
1504         if (term && term->config && strcmp(term->config, "event")) {
1505                 ret = parse_events__with_hybrid_pmu(parse_state, term->config,
1506                                                     name, list);
1507         }
1508
1509         return ret;
1510 }
1511
1512 int parse_events_add_pmu(struct parse_events_state *parse_state,
1513                          struct list_head *list, char *name,
1514                          struct list_head *head_config,
1515                          bool auto_merge_stats,
1516                          bool use_alias)
1517 {
1518         struct perf_event_attr attr;
1519         struct perf_pmu_info info;
1520         struct perf_pmu *pmu;
1521         struct evsel *evsel;
1522         struct parse_events_error *err = parse_state->error;
1523         bool use_uncore_alias;
1524         LIST_HEAD(config_terms);
1525
1526         if (verbose > 1) {
1527                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1528                         name);
1529                 if (head_config) {
1530                         struct parse_events_term *term;
1531
1532                         list_for_each_entry(term, head_config, list) {
1533                                 fprintf(stderr, "%s,", term->config);
1534                         }
1535                 }
1536                 fprintf(stderr, "' that may result in non-fatal errors\n");
1537         }
1538
1539         pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1540         if (!pmu) {
1541                 char *err_str;
1542
1543                 if (asprintf(&err_str,
1544                                 "Cannot find PMU `%s'. Missing kernel support?",
1545                                 name) >= 0)
1546                         parse_events__handle_error(err, 0, err_str, NULL);
1547                 return -EINVAL;
1548         }
1549
1550         if (pmu->default_config) {
1551                 memcpy(&attr, pmu->default_config,
1552                        sizeof(struct perf_event_attr));
1553         } else {
1554                 memset(&attr, 0, sizeof(attr));
1555         }
1556
1557         use_uncore_alias = (pmu->is_uncore && use_alias);
1558
1559         if (!head_config) {
1560                 attr.type = pmu->type;
1561                 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1562                                     pmu, NULL, auto_merge_stats, NULL);
1563                 if (evsel) {
1564                         evsel->pmu_name = name ? strdup(name) : NULL;
1565                         evsel->use_uncore_alias = use_uncore_alias;
1566                         return 0;
1567                 } else {
1568                         return -ENOMEM;
1569                 }
1570         }
1571
1572         if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1573                 return -EINVAL;
1574
1575         if (verbose > 1) {
1576                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1577                         name);
1578                 if (head_config) {
1579                         struct parse_events_term *term;
1580
1581                         list_for_each_entry(term, head_config, list) {
1582                                 fprintf(stderr, "%s,", term->config);
1583                         }
1584                 }
1585                 fprintf(stderr, "' that may result in non-fatal errors\n");
1586         }
1587
1588         /*
1589          * Configure hardcoded terms first, no need to check
1590          * return value when called with fail == 0 ;)
1591          */
1592         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1593                 return -EINVAL;
1594
1595         if (get_config_terms(head_config, &config_terms))
1596                 return -ENOMEM;
1597
1598         /*
1599          * When using default config, record which bits of attr->config were
1600          * changed by the user.
1601          */
1602         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1603                 return -ENOMEM;
1604
1605         if (!parse_events__inside_hybrid_pmu(parse_state, list, name,
1606                                              head_config)) {
1607                 return 0;
1608         }
1609
1610         if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1611                 struct evsel_config_term *pos, *tmp;
1612
1613                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1614                         list_del_init(&pos->list);
1615                         if (pos->free_str)
1616                                 zfree(&pos->val.str);
1617                         free(pos);
1618                 }
1619                 return -EINVAL;
1620         }
1621
1622         evsel = __add_event(list, &parse_state->idx, &attr, true,
1623                             get_config_name(head_config), pmu,
1624                             &config_terms, auto_merge_stats, NULL);
1625         if (!evsel)
1626                 return -ENOMEM;
1627
1628         if (evsel->name)
1629                 evsel->use_config_name = true;
1630
1631         evsel->pmu_name = name ? strdup(name) : NULL;
1632         evsel->use_uncore_alias = use_uncore_alias;
1633         evsel->percore = config_term_percore(&evsel->config_terms);
1634
1635         if (parse_state->fake_pmu)
1636                 return 0;
1637
1638         evsel->unit = info.unit;
1639         evsel->scale = info.scale;
1640         evsel->per_pkg = info.per_pkg;
1641         evsel->snapshot = info.snapshot;
1642         evsel->metric_expr = info.metric_expr;
1643         evsel->metric_name = info.metric_name;
1644         return 0;
1645 }
1646
1647 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1648                                char *str, struct list_head **listp)
1649 {
1650         struct parse_events_term *term;
1651         struct list_head *list;
1652         struct perf_pmu *pmu = NULL;
1653         int ok = 0;
1654
1655         *listp = NULL;
1656         /* Add it for all PMUs that support the alias */
1657         list = malloc(sizeof(struct list_head));
1658         if (!list)
1659                 return -1;
1660         INIT_LIST_HEAD(list);
1661         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1662                 struct perf_pmu_alias *alias;
1663
1664                 list_for_each_entry(alias, &pmu->aliases, list) {
1665                         if (!strcasecmp(alias->name, str)) {
1666                                 struct list_head *head;
1667                                 char *config;
1668
1669                                 head = malloc(sizeof(struct list_head));
1670                                 if (!head)
1671                                         return -1;
1672                                 INIT_LIST_HEAD(head);
1673                                 config = strdup(str);
1674                                 if (!config)
1675                                         return -1;
1676                                 if (parse_events_term__num(&term,
1677                                                    PARSE_EVENTS__TERM_TYPE_USER,
1678                                                    config, 1, false, &config,
1679                                                    NULL) < 0) {
1680                                         free(list);
1681                                         free(config);
1682                                         return -1;
1683                                 }
1684                                 list_add_tail(&term->list, head);
1685
1686                                 if (!parse_events_add_pmu(parse_state, list,
1687                                                           pmu->name, head,
1688                                                           true, true)) {
1689                                         pr_debug("%s -> %s/%s/\n", str,
1690                                                  pmu->name, alias->str);
1691                                         ok++;
1692                                 }
1693
1694                                 parse_events_terms__delete(head);
1695                         }
1696                 }
1697         }
1698         if (!ok) {
1699                 free(list);
1700                 return -1;
1701         }
1702         *listp = list;
1703         return 0;
1704 }
1705
1706 int parse_events__modifier_group(struct list_head *list,
1707                                  char *event_mod)
1708 {
1709         return parse_events__modifier_event(list, event_mod, true);
1710 }
1711
1712 /*
1713  * Check if the two uncore PMUs are from the same uncore block
1714  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1715  */
1716 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1717 {
1718         char *end_a, *end_b;
1719
1720         end_a = strrchr(pmu_name_a, '_');
1721         end_b = strrchr(pmu_name_b, '_');
1722
1723         if (!end_a || !end_b)
1724                 return false;
1725
1726         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1727                 return false;
1728
1729         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1730 }
1731
1732 static int
1733 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1734                                            struct parse_events_state *parse_state)
1735 {
1736         struct evsel *evsel, *leader;
1737         uintptr_t *leaders;
1738         bool is_leader = true;
1739         int i, nr_pmu = 0, total_members, ret = 0;
1740
1741         leader = list_first_entry(list, struct evsel, core.node);
1742         evsel = list_last_entry(list, struct evsel, core.node);
1743         total_members = evsel->core.idx - leader->core.idx + 1;
1744
1745         leaders = calloc(total_members, sizeof(uintptr_t));
1746         if (WARN_ON(!leaders))
1747                 return 0;
1748
1749         /*
1750          * Going through the whole group and doing sanity check.
1751          * All members must use alias, and be from the same uncore block.
1752          * Also, storing the leader events in an array.
1753          */
1754         __evlist__for_each_entry(list, evsel) {
1755
1756                 /* Only split the uncore group which members use alias */
1757                 if (!evsel->use_uncore_alias)
1758                         goto out;
1759
1760                 /* The events must be from the same uncore block */
1761                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1762                         goto out;
1763
1764                 if (!is_leader)
1765                         continue;
1766                 /*
1767                  * If the event's PMU name starts to repeat, it must be a new
1768                  * event. That can be used to distinguish the leader from
1769                  * other members, even they have the same event name.
1770                  */
1771                 if ((leader != evsel) &&
1772                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1773                         is_leader = false;
1774                         continue;
1775                 }
1776
1777                 /* Store the leader event for each PMU */
1778                 leaders[nr_pmu++] = (uintptr_t) evsel;
1779         }
1780
1781         /* only one event alias */
1782         if (nr_pmu == total_members) {
1783                 parse_state->nr_groups--;
1784                 goto handled;
1785         }
1786
1787         /*
1788          * An uncore event alias is a joint name which means the same event
1789          * runs on all PMUs of a block.
1790          * Perf doesn't support mixed events from different PMUs in the same
1791          * group. The big group has to be split into multiple small groups
1792          * which only include the events from the same PMU.
1793          *
1794          * Here the uncore event aliases must be from the same uncore block.
1795          * The number of PMUs must be same for each alias. The number of new
1796          * small groups equals to the number of PMUs.
1797          * Setting the leader event for corresponding members in each group.
1798          */
1799         i = 0;
1800         __evlist__for_each_entry(list, evsel) {
1801                 if (i >= nr_pmu)
1802                         i = 0;
1803                 evsel__set_leader(evsel, (struct evsel *) leaders[i++]);
1804         }
1805
1806         /* The number of members and group name are same for each group */
1807         for (i = 0; i < nr_pmu; i++) {
1808                 evsel = (struct evsel *) leaders[i];
1809                 evsel->core.nr_members = total_members / nr_pmu;
1810                 evsel->group_name = name ? strdup(name) : NULL;
1811         }
1812
1813         /* Take the new small groups into account */
1814         parse_state->nr_groups += nr_pmu - 1;
1815
1816 handled:
1817         ret = 1;
1818 out:
1819         free(leaders);
1820         return ret;
1821 }
1822
1823 void parse_events__set_leader(char *name, struct list_head *list,
1824                               struct parse_events_state *parse_state)
1825 {
1826         struct evsel *leader;
1827
1828         if (list_empty(list)) {
1829                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1830                 return;
1831         }
1832
1833         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1834                 return;
1835
1836         __perf_evlist__set_leader(list);
1837         leader = list_entry(list->next, struct evsel, core.node);
1838         leader->group_name = name ? strdup(name) : NULL;
1839 }
1840
1841 /* list_event is assumed to point to malloc'ed memory */
1842 void parse_events_update_lists(struct list_head *list_event,
1843                                struct list_head *list_all)
1844 {
1845         /*
1846          * Called for single event definition. Update the
1847          * 'all event' list, and reinit the 'single event'
1848          * list, for next event definition.
1849          */
1850         list_splice_tail(list_event, list_all);
1851         free(list_event);
1852 }
1853
1854 struct event_modifier {
1855         int eu;
1856         int ek;
1857         int eh;
1858         int eH;
1859         int eG;
1860         int eI;
1861         int precise;
1862         int precise_max;
1863         int exclude_GH;
1864         int sample_read;
1865         int pinned;
1866         int weak;
1867         int exclusive;
1868         int bpf_counter;
1869 };
1870
1871 static int get_event_modifier(struct event_modifier *mod, char *str,
1872                                struct evsel *evsel)
1873 {
1874         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1875         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1876         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1877         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1878         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1879         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1880         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1881         int precise_max = 0;
1882         int sample_read = 0;
1883         int pinned = evsel ? evsel->core.attr.pinned : 0;
1884         int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1885
1886         int exclude = eu | ek | eh;
1887         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1888         int weak = 0;
1889         int bpf_counter = 0;
1890
1891         memset(mod, 0, sizeof(*mod));
1892
1893         while (*str) {
1894                 if (*str == 'u') {
1895                         if (!exclude)
1896                                 exclude = eu = ek = eh = 1;
1897                         if (!exclude_GH && !perf_guest)
1898                                 eG = 1;
1899                         eu = 0;
1900                 } else if (*str == 'k') {
1901                         if (!exclude)
1902                                 exclude = eu = ek = eh = 1;
1903                         ek = 0;
1904                 } else if (*str == 'h') {
1905                         if (!exclude)
1906                                 exclude = eu = ek = eh = 1;
1907                         eh = 0;
1908                 } else if (*str == 'G') {
1909                         if (!exclude_GH)
1910                                 exclude_GH = eG = eH = 1;
1911                         eG = 0;
1912                 } else if (*str == 'H') {
1913                         if (!exclude_GH)
1914                                 exclude_GH = eG = eH = 1;
1915                         eH = 0;
1916                 } else if (*str == 'I') {
1917                         eI = 1;
1918                 } else if (*str == 'p') {
1919                         precise++;
1920                         /* use of precise requires exclude_guest */
1921                         if (!exclude_GH)
1922                                 eG = 1;
1923                 } else if (*str == 'P') {
1924                         precise_max = 1;
1925                 } else if (*str == 'S') {
1926                         sample_read = 1;
1927                 } else if (*str == 'D') {
1928                         pinned = 1;
1929                 } else if (*str == 'e') {
1930                         exclusive = 1;
1931                 } else if (*str == 'W') {
1932                         weak = 1;
1933                 } else if (*str == 'b') {
1934                         bpf_counter = 1;
1935                 } else
1936                         break;
1937
1938                 ++str;
1939         }
1940
1941         /*
1942          * precise ip:
1943          *
1944          *  0 - SAMPLE_IP can have arbitrary skid
1945          *  1 - SAMPLE_IP must have constant skid
1946          *  2 - SAMPLE_IP requested to have 0 skid
1947          *  3 - SAMPLE_IP must have 0 skid
1948          *
1949          *  See also PERF_RECORD_MISC_EXACT_IP
1950          */
1951         if (precise > 3)
1952                 return -EINVAL;
1953
1954         mod->eu = eu;
1955         mod->ek = ek;
1956         mod->eh = eh;
1957         mod->eH = eH;
1958         mod->eG = eG;
1959         mod->eI = eI;
1960         mod->precise = precise;
1961         mod->precise_max = precise_max;
1962         mod->exclude_GH = exclude_GH;
1963         mod->sample_read = sample_read;
1964         mod->pinned = pinned;
1965         mod->weak = weak;
1966         mod->bpf_counter = bpf_counter;
1967         mod->exclusive = exclusive;
1968
1969         return 0;
1970 }
1971
1972 /*
1973  * Basic modifier sanity check to validate it contains only one
1974  * instance of any modifier (apart from 'p') present.
1975  */
1976 static int check_modifier(char *str)
1977 {
1978         char *p = str;
1979
1980         /* The sizeof includes 0 byte as well. */
1981         if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1))
1982                 return -1;
1983
1984         while (*p) {
1985                 if (*p != 'p' && strchr(p + 1, *p))
1986                         return -1;
1987                 p++;
1988         }
1989
1990         return 0;
1991 }
1992
1993 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1994 {
1995         struct evsel *evsel;
1996         struct event_modifier mod;
1997
1998         if (str == NULL)
1999                 return 0;
2000
2001         if (check_modifier(str))
2002                 return -EINVAL;
2003
2004         if (!add && get_event_modifier(&mod, str, NULL))
2005                 return -EINVAL;
2006
2007         __evlist__for_each_entry(list, evsel) {
2008                 if (add && get_event_modifier(&mod, str, evsel))
2009                         return -EINVAL;
2010
2011                 evsel->core.attr.exclude_user   = mod.eu;
2012                 evsel->core.attr.exclude_kernel = mod.ek;
2013                 evsel->core.attr.exclude_hv     = mod.eh;
2014                 evsel->core.attr.precise_ip     = mod.precise;
2015                 evsel->core.attr.exclude_host   = mod.eH;
2016                 evsel->core.attr.exclude_guest  = mod.eG;
2017                 evsel->core.attr.exclude_idle   = mod.eI;
2018                 evsel->exclude_GH          = mod.exclude_GH;
2019                 evsel->sample_read         = mod.sample_read;
2020                 evsel->precise_max         = mod.precise_max;
2021                 evsel->weak_group          = mod.weak;
2022                 evsel->bpf_counter         = mod.bpf_counter;
2023
2024                 if (evsel__is_group_leader(evsel)) {
2025                         evsel->core.attr.pinned = mod.pinned;
2026                         evsel->core.attr.exclusive = mod.exclusive;
2027                 }
2028         }
2029
2030         return 0;
2031 }
2032
2033 int parse_events_name(struct list_head *list, char *name)
2034 {
2035         struct evsel *evsel;
2036
2037         __evlist__for_each_entry(list, evsel) {
2038                 if (!evsel->name)
2039                         evsel->name = strdup(name);
2040         }
2041
2042         return 0;
2043 }
2044
2045 static int
2046 comp_pmu(const void *p1, const void *p2)
2047 {
2048         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
2049         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
2050
2051         return strcasecmp(pmu1->symbol, pmu2->symbol);
2052 }
2053
2054 static void perf_pmu__parse_cleanup(void)
2055 {
2056         if (perf_pmu_events_list_num > 0) {
2057                 struct perf_pmu_event_symbol *p;
2058                 int i;
2059
2060                 for (i = 0; i < perf_pmu_events_list_num; i++) {
2061                         p = perf_pmu_events_list + i;
2062                         zfree(&p->symbol);
2063                 }
2064                 zfree(&perf_pmu_events_list);
2065                 perf_pmu_events_list_num = 0;
2066         }
2067 }
2068
2069 #define SET_SYMBOL(str, stype)          \
2070 do {                                    \
2071         p->symbol = str;                \
2072         if (!p->symbol)                 \
2073                 goto err;               \
2074         p->type = stype;                \
2075 } while (0)
2076
2077 /*
2078  * Read the pmu events list from sysfs
2079  * Save it into perf_pmu_events_list
2080  */
2081 static void perf_pmu__parse_init(void)
2082 {
2083
2084         struct perf_pmu *pmu = NULL;
2085         struct perf_pmu_alias *alias;
2086         int len = 0;
2087
2088         pmu = NULL;
2089         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2090                 list_for_each_entry(alias, &pmu->aliases, list) {
2091                         if (strchr(alias->name, '-'))
2092                                 len++;
2093                         len++;
2094                 }
2095         }
2096
2097         if (len == 0) {
2098                 perf_pmu_events_list_num = -1;
2099                 return;
2100         }
2101         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2102         if (!perf_pmu_events_list)
2103                 return;
2104         perf_pmu_events_list_num = len;
2105
2106         len = 0;
2107         pmu = NULL;
2108         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2109                 list_for_each_entry(alias, &pmu->aliases, list) {
2110                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2111                         char *tmp = strchr(alias->name, '-');
2112
2113                         if (tmp != NULL) {
2114                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2115                                                 PMU_EVENT_SYMBOL_PREFIX);
2116                                 p++;
2117                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2118                                 len += 2;
2119                         } else {
2120                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2121                                 len++;
2122                         }
2123                 }
2124         }
2125         qsort(perf_pmu_events_list, len,
2126                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2127
2128         return;
2129 err:
2130         perf_pmu__parse_cleanup();
2131 }
2132
2133 /*
2134  * This function injects special term in
2135  * perf_pmu_events_list so the test code
2136  * can check on this functionality.
2137  */
2138 int perf_pmu__test_parse_init(void)
2139 {
2140         struct perf_pmu_event_symbol *list;
2141
2142         list = malloc(sizeof(*list) * 1);
2143         if (!list)
2144                 return -ENOMEM;
2145
2146         list->type   = PMU_EVENT_SYMBOL;
2147         list->symbol = strdup("read");
2148
2149         if (!list->symbol) {
2150                 free(list);
2151                 return -ENOMEM;
2152         }
2153
2154         perf_pmu_events_list = list;
2155         perf_pmu_events_list_num = 1;
2156         return 0;
2157 }
2158
2159 enum perf_pmu_event_symbol_type
2160 perf_pmu__parse_check(const char *name)
2161 {
2162         struct perf_pmu_event_symbol p, *r;
2163
2164         /* scan kernel pmu events from sysfs if needed */
2165         if (perf_pmu_events_list_num == 0)
2166                 perf_pmu__parse_init();
2167         /*
2168          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2169          * cpu-cycles has been handled by hardcode.
2170          * So it must be cpu// events, not kernel pmu event.
2171          */
2172         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2173                 return PMU_EVENT_SYMBOL_ERR;
2174
2175         p.symbol = strdup(name);
2176         r = bsearch(&p, perf_pmu_events_list,
2177                         (size_t) perf_pmu_events_list_num,
2178                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2179         zfree(&p.symbol);
2180         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2181 }
2182
2183 static int parse_events__scanner(const char *str,
2184                                  struct parse_events_state *parse_state)
2185 {
2186         YY_BUFFER_STATE buffer;
2187         void *scanner;
2188         int ret;
2189
2190         ret = parse_events_lex_init_extra(parse_state, &scanner);
2191         if (ret)
2192                 return ret;
2193
2194         buffer = parse_events__scan_string(str, scanner);
2195
2196 #ifdef PARSER_DEBUG
2197         parse_events_debug = 1;
2198         parse_events_set_debug(1, scanner);
2199 #endif
2200         ret = parse_events_parse(parse_state, scanner);
2201
2202         parse_events__flush_buffer(buffer, scanner);
2203         parse_events__delete_buffer(buffer, scanner);
2204         parse_events_lex_destroy(scanner);
2205         return ret;
2206 }
2207
2208 /*
2209  * parse event config string, return a list of event terms.
2210  */
2211 int parse_events_terms(struct list_head *terms, const char *str)
2212 {
2213         struct parse_events_state parse_state = {
2214                 .terms  = NULL,
2215                 .stoken = PE_START_TERMS,
2216         };
2217         int ret;
2218
2219         ret = parse_events__scanner(str, &parse_state);
2220         perf_pmu__parse_cleanup();
2221
2222         if (!ret) {
2223                 list_splice(parse_state.terms, terms);
2224                 zfree(&parse_state.terms);
2225                 return 0;
2226         }
2227
2228         parse_events_terms__delete(parse_state.terms);
2229         return ret;
2230 }
2231
2232 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
2233                                          const char *str, char *pmu_name,
2234                                          struct list_head *list)
2235 {
2236         struct parse_events_state ps = {
2237                 .list            = LIST_HEAD_INIT(ps.list),
2238                 .stoken          = PE_START_EVENTS,
2239                 .hybrid_pmu_name = pmu_name,
2240                 .idx             = parse_state->idx,
2241         };
2242         int ret;
2243
2244         ret = parse_events__scanner(str, &ps);
2245         perf_pmu__parse_cleanup();
2246
2247         if (!ret) {
2248                 if (!list_empty(&ps.list)) {
2249                         list_splice(&ps.list, list);
2250                         parse_state->idx = ps.idx;
2251                         return 0;
2252                 } else
2253                         return -1;
2254         }
2255
2256         return ret;
2257 }
2258
2259 int __parse_events(struct evlist *evlist, const char *str,
2260                    struct parse_events_error *err, struct perf_pmu *fake_pmu)
2261 {
2262         struct parse_events_state parse_state = {
2263                 .list     = LIST_HEAD_INIT(parse_state.list),
2264                 .idx      = evlist->core.nr_entries,
2265                 .error    = err,
2266                 .evlist   = evlist,
2267                 .stoken   = PE_START_EVENTS,
2268                 .fake_pmu = fake_pmu,
2269         };
2270         int ret;
2271
2272         ret = parse_events__scanner(str, &parse_state);
2273         perf_pmu__parse_cleanup();
2274
2275         if (!ret && list_empty(&parse_state.list)) {
2276                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2277                 return -1;
2278         }
2279
2280         /*
2281          * Add list to the evlist even with errors to allow callers to clean up.
2282          */
2283         evlist__splice_list_tail(evlist, &parse_state.list);
2284
2285         if (!ret) {
2286                 struct evsel *last;
2287
2288                 evlist->core.nr_groups += parse_state.nr_groups;
2289                 last = evlist__last(evlist);
2290                 last->cmdline_group_boundary = true;
2291
2292                 return 0;
2293         }
2294
2295         /*
2296          * There are 2 users - builtin-record and builtin-test objects.
2297          * Both call evlist__delete in case of error, so we dont
2298          * need to bother.
2299          */
2300         return ret;
2301 }
2302
2303 #define MAX_WIDTH 1000
2304 static int get_term_width(void)
2305 {
2306         struct winsize ws;
2307
2308         get_term_dimensions(&ws);
2309         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2310 }
2311
2312 static void __parse_events_print_error(int err_idx, const char *err_str,
2313                                 const char *err_help, const char *event)
2314 {
2315         const char *str = "invalid or unsupported event: ";
2316         char _buf[MAX_WIDTH];
2317         char *buf = (char *) event;
2318         int idx = 0;
2319         if (err_str) {
2320                 /* -2 for extra '' in the final fprintf */
2321                 int width       = get_term_width() - 2;
2322                 int len_event   = strlen(event);
2323                 int len_str, max_len, cut = 0;
2324
2325                 /*
2326                  * Maximum error index indent, we will cut
2327                  * the event string if it's bigger.
2328                  */
2329                 int max_err_idx = 13;
2330
2331                 /*
2332                  * Let's be specific with the message when
2333                  * we have the precise error.
2334                  */
2335                 str     = "event syntax error: ";
2336                 len_str = strlen(str);
2337                 max_len = width - len_str;
2338
2339                 buf = _buf;
2340
2341                 /* We're cutting from the beginning. */
2342                 if (err_idx > max_err_idx)
2343                         cut = err_idx - max_err_idx;
2344
2345                 strncpy(buf, event + cut, max_len);
2346
2347                 /* Mark cut parts with '..' on both sides. */
2348                 if (cut)
2349                         buf[0] = buf[1] = '.';
2350
2351                 if ((len_event - cut) > max_len) {
2352                         buf[max_len - 1] = buf[max_len - 2] = '.';
2353                         buf[max_len] = 0;
2354                 }
2355
2356                 idx = len_str + err_idx - cut;
2357         }
2358
2359         fprintf(stderr, "%s'%s'\n", str, buf);
2360         if (idx) {
2361                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2362                 if (err_help)
2363                         fprintf(stderr, "\n%s\n", err_help);
2364         }
2365 }
2366
2367 void parse_events_print_error(struct parse_events_error *err,
2368                               const char *event)
2369 {
2370         if (!err->num_errors)
2371                 return;
2372
2373         __parse_events_print_error(err->idx, err->str, err->help, event);
2374         zfree(&err->str);
2375         zfree(&err->help);
2376
2377         if (err->num_errors > 1) {
2378                 fputs("\nInitial error:\n", stderr);
2379                 __parse_events_print_error(err->first_idx, err->first_str,
2380                                         err->first_help, event);
2381                 zfree(&err->first_str);
2382                 zfree(&err->first_help);
2383         }
2384 }
2385
2386 #undef MAX_WIDTH
2387
2388 int parse_events_option(const struct option *opt, const char *str,
2389                         int unset __maybe_unused)
2390 {
2391         struct evlist *evlist = *(struct evlist **)opt->value;
2392         struct parse_events_error err;
2393         int ret;
2394
2395         bzero(&err, sizeof(err));
2396         ret = parse_events(evlist, str, &err);
2397
2398         if (ret) {
2399                 parse_events_print_error(&err, str);
2400                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2401         }
2402
2403         return ret;
2404 }
2405
2406 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2407 {
2408         struct evlist **evlistp = opt->value;
2409         int ret;
2410
2411         if (*evlistp == NULL) {
2412                 *evlistp = evlist__new();
2413
2414                 if (*evlistp == NULL) {
2415                         fprintf(stderr, "Not enough memory to create evlist\n");
2416                         return -1;
2417                 }
2418         }
2419
2420         ret = parse_events_option(opt, str, unset);
2421         if (ret) {
2422                 evlist__delete(*evlistp);
2423                 *evlistp = NULL;
2424         }
2425
2426         return ret;
2427 }
2428
2429 static int
2430 foreach_evsel_in_last_glob(struct evlist *evlist,
2431                            int (*func)(struct evsel *evsel,
2432                                        const void *arg),
2433                            const void *arg)
2434 {
2435         struct evsel *last = NULL;
2436         int err;
2437
2438         /*
2439          * Don't return when list_empty, give func a chance to report
2440          * error when it found last == NULL.
2441          *
2442          * So no need to WARN here, let *func do this.
2443          */
2444         if (evlist->core.nr_entries > 0)
2445                 last = evlist__last(evlist);
2446
2447         do {
2448                 err = (*func)(last, arg);
2449                 if (err)
2450                         return -1;
2451                 if (!last)
2452                         return 0;
2453
2454                 if (last->core.node.prev == &evlist->core.entries)
2455                         return 0;
2456                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2457         } while (!last->cmdline_group_boundary);
2458
2459         return 0;
2460 }
2461
2462 static int set_filter(struct evsel *evsel, const void *arg)
2463 {
2464         const char *str = arg;
2465         bool found = false;
2466         int nr_addr_filters = 0;
2467         struct perf_pmu *pmu = NULL;
2468
2469         if (evsel == NULL) {
2470                 fprintf(stderr,
2471                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2472                 return -1;
2473         }
2474
2475         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2476                 if (evsel__append_tp_filter(evsel, str) < 0) {
2477                         fprintf(stderr,
2478                                 "not enough memory to hold filter string\n");
2479                         return -1;
2480                 }
2481
2482                 return 0;
2483         }
2484
2485         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2486                 if (pmu->type == evsel->core.attr.type) {
2487                         found = true;
2488                         break;
2489                 }
2490
2491         if (found)
2492                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2493                                     "%d", &nr_addr_filters);
2494
2495         if (!nr_addr_filters) {
2496                 fprintf(stderr,
2497                         "This CPU does not support address filtering\n");
2498                 return -1;
2499         }
2500
2501         if (evsel__append_addr_filter(evsel, str) < 0) {
2502                 fprintf(stderr,
2503                         "not enough memory to hold filter string\n");
2504                 return -1;
2505         }
2506
2507         return 0;
2508 }
2509
2510 int parse_filter(const struct option *opt, const char *str,
2511                  int unset __maybe_unused)
2512 {
2513         struct evlist *evlist = *(struct evlist **)opt->value;
2514
2515         return foreach_evsel_in_last_glob(evlist, set_filter,
2516                                           (const void *)str);
2517 }
2518
2519 static int add_exclude_perf_filter(struct evsel *evsel,
2520                                    const void *arg __maybe_unused)
2521 {
2522         char new_filter[64];
2523
2524         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2525                 fprintf(stderr,
2526                         "--exclude-perf option should follow a -e tracepoint option\n");
2527                 return -1;
2528         }
2529
2530         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2531
2532         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2533                 fprintf(stderr,
2534                         "not enough memory to hold filter string\n");
2535                 return -1;
2536         }
2537
2538         return 0;
2539 }
2540
2541 int exclude_perf(const struct option *opt,
2542                  const char *arg __maybe_unused,
2543                  int unset __maybe_unused)
2544 {
2545         struct evlist *evlist = *(struct evlist **)opt->value;
2546
2547         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2548                                           NULL);
2549 }
2550
2551 static const char * const event_type_descriptors[] = {
2552         "Hardware event",
2553         "Software event",
2554         "Tracepoint event",
2555         "Hardware cache event",
2556         "Raw hardware event descriptor",
2557         "Hardware breakpoint",
2558 };
2559
2560 static int cmp_string(const void *a, const void *b)
2561 {
2562         const char * const *as = a;
2563         const char * const *bs = b;
2564
2565         return strcmp(*as, *bs);
2566 }
2567
2568 /*
2569  * Print the events from <debugfs_mount_point>/tracing/events
2570  */
2571
2572 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2573                              bool name_only)
2574 {
2575         DIR *sys_dir, *evt_dir;
2576         struct dirent *sys_dirent, *evt_dirent;
2577         char evt_path[MAXPATHLEN];
2578         char *dir_path;
2579         char **evt_list = NULL;
2580         unsigned int evt_i = 0, evt_num = 0;
2581         bool evt_num_known = false;
2582
2583 restart:
2584         sys_dir = tracing_events__opendir();
2585         if (!sys_dir)
2586                 return;
2587
2588         if (evt_num_known) {
2589                 evt_list = zalloc(sizeof(char *) * evt_num);
2590                 if (!evt_list)
2591                         goto out_close_sys_dir;
2592         }
2593
2594         for_each_subsystem(sys_dir, sys_dirent) {
2595                 if (subsys_glob != NULL &&
2596                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2597                         continue;
2598
2599                 dir_path = get_events_file(sys_dirent->d_name);
2600                 if (!dir_path)
2601                         continue;
2602                 evt_dir = opendir(dir_path);
2603                 if (!evt_dir)
2604                         goto next;
2605
2606                 for_each_event(dir_path, evt_dir, evt_dirent) {
2607                         if (event_glob != NULL &&
2608                             !strglobmatch(evt_dirent->d_name, event_glob))
2609                                 continue;
2610
2611                         if (!evt_num_known) {
2612                                 evt_num++;
2613                                 continue;
2614                         }
2615
2616                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2617                                  sys_dirent->d_name, evt_dirent->d_name);
2618
2619                         evt_list[evt_i] = strdup(evt_path);
2620                         if (evt_list[evt_i] == NULL) {
2621                                 put_events_file(dir_path);
2622                                 goto out_close_evt_dir;
2623                         }
2624                         evt_i++;
2625                 }
2626                 closedir(evt_dir);
2627 next:
2628                 put_events_file(dir_path);
2629         }
2630         closedir(sys_dir);
2631
2632         if (!evt_num_known) {
2633                 evt_num_known = true;
2634                 goto restart;
2635         }
2636         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2637         evt_i = 0;
2638         while (evt_i < evt_num) {
2639                 if (name_only) {
2640                         printf("%s ", evt_list[evt_i++]);
2641                         continue;
2642                 }
2643                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2644                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2645         }
2646         if (evt_num && pager_in_use())
2647                 printf("\n");
2648
2649 out_free:
2650         evt_num = evt_i;
2651         for (evt_i = 0; evt_i < evt_num; evt_i++)
2652                 zfree(&evt_list[evt_i]);
2653         zfree(&evt_list);
2654         return;
2655
2656 out_close_evt_dir:
2657         closedir(evt_dir);
2658 out_close_sys_dir:
2659         closedir(sys_dir);
2660
2661         printf("FATAL: not enough memory to print %s\n",
2662                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2663         if (evt_list)
2664                 goto out_free;
2665 }
2666
2667 /*
2668  * Check whether event is in <debugfs_mount_point>/tracing/events
2669  */
2670
2671 int is_valid_tracepoint(const char *event_string)
2672 {
2673         DIR *sys_dir, *evt_dir;
2674         struct dirent *sys_dirent, *evt_dirent;
2675         char evt_path[MAXPATHLEN];
2676         char *dir_path;
2677
2678         sys_dir = tracing_events__opendir();
2679         if (!sys_dir)
2680                 return 0;
2681
2682         for_each_subsystem(sys_dir, sys_dirent) {
2683                 dir_path = get_events_file(sys_dirent->d_name);
2684                 if (!dir_path)
2685                         continue;
2686                 evt_dir = opendir(dir_path);
2687                 if (!evt_dir)
2688                         goto next;
2689
2690                 for_each_event(dir_path, evt_dir, evt_dirent) {
2691                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2692                                  sys_dirent->d_name, evt_dirent->d_name);
2693                         if (!strcmp(evt_path, event_string)) {
2694                                 closedir(evt_dir);
2695                                 closedir(sys_dir);
2696                                 return 1;
2697                         }
2698                 }
2699                 closedir(evt_dir);
2700 next:
2701                 put_events_file(dir_path);
2702         }
2703         closedir(sys_dir);
2704         return 0;
2705 }
2706
2707 static bool is_event_supported(u8 type, unsigned config)
2708 {
2709         bool ret = true;
2710         int open_return;
2711         struct evsel *evsel;
2712         struct perf_event_attr attr = {
2713                 .type = type,
2714                 .config = config,
2715                 .disabled = 1,
2716         };
2717         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2718
2719         if (tmap == NULL)
2720                 return false;
2721
2722         evsel = evsel__new(&attr);
2723         if (evsel) {
2724                 open_return = evsel__open(evsel, NULL, tmap);
2725                 ret = open_return >= 0;
2726
2727                 if (open_return == -EACCES) {
2728                         /*
2729                          * This happens if the paranoid value
2730                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2731                          * Re-run with exclude_kernel set; we don't do that
2732                          * by default as some ARM machines do not support it.
2733                          *
2734                          */
2735                         evsel->core.attr.exclude_kernel = 1;
2736                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2737                 }
2738                 evsel__delete(evsel);
2739         }
2740
2741         perf_thread_map__put(tmap);
2742         return ret;
2743 }
2744
2745 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2746                       bool name_only)
2747 {
2748         struct probe_cache *pcache;
2749         struct probe_cache_entry *ent;
2750         struct strlist *bidlist, *sdtlist;
2751         struct strlist_config cfg = {.dont_dupstr = true};
2752         struct str_node *nd, *nd2;
2753         char *buf, *path, *ptr = NULL;
2754         bool show_detail = false;
2755         int ret;
2756
2757         sdtlist = strlist__new(NULL, &cfg);
2758         if (!sdtlist) {
2759                 pr_debug("Failed to allocate new strlist for SDT\n");
2760                 return;
2761         }
2762         bidlist = build_id_cache__list_all(true);
2763         if (!bidlist) {
2764                 pr_debug("Failed to get buildids: %d\n", errno);
2765                 return;
2766         }
2767         strlist__for_each_entry(nd, bidlist) {
2768                 pcache = probe_cache__new(nd->s, NULL);
2769                 if (!pcache)
2770                         continue;
2771                 list_for_each_entry(ent, &pcache->entries, node) {
2772                         if (!ent->sdt)
2773                                 continue;
2774                         if (subsys_glob &&
2775                             !strglobmatch(ent->pev.group, subsys_glob))
2776                                 continue;
2777                         if (event_glob &&
2778                             !strglobmatch(ent->pev.event, event_glob))
2779                                 continue;
2780                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2781                                         ent->pev.event, nd->s);
2782                         if (ret > 0)
2783                                 strlist__add(sdtlist, buf);
2784                 }
2785                 probe_cache__delete(pcache);
2786         }
2787         strlist__delete(bidlist);
2788
2789         strlist__for_each_entry(nd, sdtlist) {
2790                 buf = strchr(nd->s, '@');
2791                 if (buf)
2792                         *(buf++) = '\0';
2793                 if (name_only) {
2794                         printf("%s ", nd->s);
2795                         continue;
2796                 }
2797                 nd2 = strlist__next(nd);
2798                 if (nd2) {
2799                         ptr = strchr(nd2->s, '@');
2800                         if (ptr)
2801                                 *ptr = '\0';
2802                         if (strcmp(nd->s, nd2->s) == 0)
2803                                 show_detail = true;
2804                 }
2805                 if (show_detail) {
2806                         path = build_id_cache__origname(buf);
2807                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2808                         if (ret > 0) {
2809                                 printf("  %-50s [%s]\n", buf, "SDT event");
2810                                 free(buf);
2811                         }
2812                         free(path);
2813                 } else
2814                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2815                 if (nd2) {
2816                         if (strcmp(nd->s, nd2->s) != 0)
2817                                 show_detail = false;
2818                         if (ptr)
2819                                 *ptr = '@';
2820                 }
2821         }
2822         strlist__delete(sdtlist);
2823 }
2824
2825 int print_hwcache_events(const char *event_glob, bool name_only)
2826 {
2827         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2828         char name[64];
2829         char **evt_list = NULL;
2830         bool evt_num_known = false;
2831
2832 restart:
2833         if (evt_num_known) {
2834                 evt_list = zalloc(sizeof(char *) * evt_num);
2835                 if (!evt_list)
2836                         goto out_enomem;
2837         }
2838
2839         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2840                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2841                         /* skip invalid cache type */
2842                         if (!evsel__is_cache_op_valid(type, op))
2843                                 continue;
2844
2845                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2846                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2847                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2848                                         continue;
2849
2850                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2851                                                         type | (op << 8) | (i << 16)))
2852                                         continue;
2853
2854                                 if (!evt_num_known) {
2855                                         evt_num++;
2856                                         continue;
2857                                 }
2858
2859                                 evt_list[evt_i] = strdup(name);
2860                                 if (evt_list[evt_i] == NULL)
2861                                         goto out_enomem;
2862                                 evt_i++;
2863                         }
2864                 }
2865         }
2866
2867         if (!evt_num_known) {
2868                 evt_num_known = true;
2869                 goto restart;
2870         }
2871         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2872         evt_i = 0;
2873         while (evt_i < evt_num) {
2874                 if (name_only) {
2875                         printf("%s ", evt_list[evt_i++]);
2876                         continue;
2877                 }
2878                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2879                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2880         }
2881         if (evt_num && pager_in_use())
2882                 printf("\n");
2883
2884 out_free:
2885         evt_num = evt_i;
2886         for (evt_i = 0; evt_i < evt_num; evt_i++)
2887                 zfree(&evt_list[evt_i]);
2888         zfree(&evt_list);
2889         return evt_num;
2890
2891 out_enomem:
2892         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2893         if (evt_list)
2894                 goto out_free;
2895         return evt_num;
2896 }
2897
2898 static void print_tool_event(const char *name, const char *event_glob,
2899                              bool name_only)
2900 {
2901         if (event_glob && !strglobmatch(name, event_glob))
2902                 return;
2903         if (name_only)
2904                 printf("%s ", name);
2905         else
2906                 printf("  %-50s [%s]\n", name, "Tool event");
2907
2908 }
2909
2910 void print_tool_events(const char *event_glob, bool name_only)
2911 {
2912         print_tool_event("duration_time", event_glob, name_only);
2913         if (pager_in_use())
2914                 printf("\n");
2915 }
2916
2917 void print_symbol_events(const char *event_glob, unsigned type,
2918                                 struct event_symbol *syms, unsigned max,
2919                                 bool name_only)
2920 {
2921         unsigned int i, evt_i = 0, evt_num = 0;
2922         char name[MAX_NAME_LEN];
2923         char **evt_list = NULL;
2924         bool evt_num_known = false;
2925
2926 restart:
2927         if (evt_num_known) {
2928                 evt_list = zalloc(sizeof(char *) * evt_num);
2929                 if (!evt_list)
2930                         goto out_enomem;
2931                 syms -= max;
2932         }
2933
2934         for (i = 0; i < max; i++, syms++) {
2935                 /*
2936                  * New attr.config still not supported here, the latest
2937                  * example was PERF_COUNT_SW_CGROUP_SWITCHES
2938                  */
2939                 if (syms->symbol == NULL)
2940                         continue;
2941
2942                 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
2943                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2944                         continue;
2945
2946                 if (!is_event_supported(type, i))
2947                         continue;
2948
2949                 if (!evt_num_known) {
2950                         evt_num++;
2951                         continue;
2952                 }
2953
2954                 if (!name_only && strlen(syms->alias))
2955                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2956                 else
2957                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2958
2959                 evt_list[evt_i] = strdup(name);
2960                 if (evt_list[evt_i] == NULL)
2961                         goto out_enomem;
2962                 evt_i++;
2963         }
2964
2965         if (!evt_num_known) {
2966                 evt_num_known = true;
2967                 goto restart;
2968         }
2969         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2970         evt_i = 0;
2971         while (evt_i < evt_num) {
2972                 if (name_only) {
2973                         printf("%s ", evt_list[evt_i++]);
2974                         continue;
2975                 }
2976                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2977         }
2978         if (evt_num && pager_in_use())
2979                 printf("\n");
2980
2981 out_free:
2982         evt_num = evt_i;
2983         for (evt_i = 0; evt_i < evt_num; evt_i++)
2984                 zfree(&evt_list[evt_i]);
2985         zfree(&evt_list);
2986         return;
2987
2988 out_enomem:
2989         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2990         if (evt_list)
2991                 goto out_free;
2992 }
2993
2994 /*
2995  * Print the help text for the event symbols:
2996  */
2997 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2998                         bool long_desc, bool details_flag, bool deprecated)
2999 {
3000         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
3001                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
3002
3003         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
3004                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
3005         print_tool_events(event_glob, name_only);
3006
3007         print_hwcache_events(event_glob, name_only);
3008
3009         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
3010                         details_flag, deprecated);
3011
3012         if (event_glob != NULL)
3013                 return;
3014
3015         if (!name_only) {
3016                 printf("  %-50s [%s]\n",
3017                        "rNNN",
3018                        event_type_descriptors[PERF_TYPE_RAW]);
3019                 printf("  %-50s [%s]\n",
3020                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
3021                        event_type_descriptors[PERF_TYPE_RAW]);
3022                 if (pager_in_use())
3023                         printf("   (see 'man perf-list' on how to encode it)\n\n");
3024
3025                 printf("  %-50s [%s]\n",
3026                        "mem:<addr>[/len][:access]",
3027                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
3028                 if (pager_in_use())
3029                         printf("\n");
3030         }
3031
3032         print_tracepoint_events(NULL, NULL, name_only);
3033
3034         print_sdt_events(NULL, NULL, name_only);
3035
3036         metricgroup__print(true, true, NULL, name_only, details_flag);
3037
3038         print_libpfm_events(name_only, long_desc);
3039 }
3040
3041 int parse_events__is_hardcoded_term(struct parse_events_term *term)
3042 {
3043         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
3044 }
3045
3046 static int new_term(struct parse_events_term **_term,
3047                     struct parse_events_term *temp,
3048                     char *str, u64 num)
3049 {
3050         struct parse_events_term *term;
3051
3052         term = malloc(sizeof(*term));
3053         if (!term)
3054                 return -ENOMEM;
3055
3056         *term = *temp;
3057         INIT_LIST_HEAD(&term->list);
3058         term->weak = false;
3059
3060         switch (term->type_val) {
3061         case PARSE_EVENTS__TERM_TYPE_NUM:
3062                 term->val.num = num;
3063                 break;
3064         case PARSE_EVENTS__TERM_TYPE_STR:
3065                 term->val.str = str;
3066                 break;
3067         default:
3068                 free(term);
3069                 return -EINVAL;
3070         }
3071
3072         *_term = term;
3073         return 0;
3074 }
3075
3076 int parse_events_term__num(struct parse_events_term **term,
3077                            int type_term, char *config, u64 num,
3078                            bool no_value,
3079                            void *loc_term_, void *loc_val_)
3080 {
3081         YYLTYPE *loc_term = loc_term_;
3082         YYLTYPE *loc_val = loc_val_;
3083
3084         struct parse_events_term temp = {
3085                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
3086                 .type_term = type_term,
3087                 .config    = config,
3088                 .no_value  = no_value,
3089                 .err_term  = loc_term ? loc_term->first_column : 0,
3090                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3091         };
3092
3093         return new_term(term, &temp, NULL, num);
3094 }
3095
3096 int parse_events_term__str(struct parse_events_term **term,
3097                            int type_term, char *config, char *str,
3098                            void *loc_term_, void *loc_val_)
3099 {
3100         YYLTYPE *loc_term = loc_term_;
3101         YYLTYPE *loc_val = loc_val_;
3102
3103         struct parse_events_term temp = {
3104                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3105                 .type_term = type_term,
3106                 .config    = config,
3107                 .err_term  = loc_term ? loc_term->first_column : 0,
3108                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3109         };
3110
3111         return new_term(term, &temp, str, 0);
3112 }
3113
3114 int parse_events_term__sym_hw(struct parse_events_term **term,
3115                               char *config, unsigned idx)
3116 {
3117         struct event_symbol *sym;
3118         char *str;
3119         struct parse_events_term temp = {
3120                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3121                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3122                 .config    = config,
3123         };
3124
3125         if (!temp.config) {
3126                 temp.config = strdup("event");
3127                 if (!temp.config)
3128                         return -ENOMEM;
3129         }
3130         BUG_ON(idx >= PERF_COUNT_HW_MAX);
3131         sym = &event_symbols_hw[idx];
3132
3133         str = strdup(sym->symbol);
3134         if (!str)
3135                 return -ENOMEM;
3136         return new_term(term, &temp, str, 0);
3137 }
3138
3139 int parse_events_term__clone(struct parse_events_term **new,
3140                              struct parse_events_term *term)
3141 {
3142         char *str;
3143         struct parse_events_term temp = {
3144                 .type_val  = term->type_val,
3145                 .type_term = term->type_term,
3146                 .config    = NULL,
3147                 .err_term  = term->err_term,
3148                 .err_val   = term->err_val,
3149         };
3150
3151         if (term->config) {
3152                 temp.config = strdup(term->config);
3153                 if (!temp.config)
3154                         return -ENOMEM;
3155         }
3156         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3157                 return new_term(new, &temp, NULL, term->val.num);
3158
3159         str = strdup(term->val.str);
3160         if (!str)
3161                 return -ENOMEM;
3162         return new_term(new, &temp, str, 0);
3163 }
3164
3165 void parse_events_term__delete(struct parse_events_term *term)
3166 {
3167         if (term->array.nr_ranges)
3168                 zfree(&term->array.ranges);
3169
3170         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3171                 zfree(&term->val.str);
3172
3173         zfree(&term->config);
3174         free(term);
3175 }
3176
3177 int parse_events_copy_term_list(struct list_head *old,
3178                                  struct list_head **new)
3179 {
3180         struct parse_events_term *term, *n;
3181         int ret;
3182
3183         if (!old) {
3184                 *new = NULL;
3185                 return 0;
3186         }
3187
3188         *new = malloc(sizeof(struct list_head));
3189         if (!*new)
3190                 return -ENOMEM;
3191         INIT_LIST_HEAD(*new);
3192
3193         list_for_each_entry (term, old, list) {
3194                 ret = parse_events_term__clone(&n, term);
3195                 if (ret)
3196                         return ret;
3197                 list_add_tail(&n->list, *new);
3198         }
3199         return 0;
3200 }
3201
3202 void parse_events_terms__purge(struct list_head *terms)
3203 {
3204         struct parse_events_term *term, *h;
3205
3206         list_for_each_entry_safe(term, h, terms, list) {
3207                 list_del_init(&term->list);
3208                 parse_events_term__delete(term);
3209         }
3210 }
3211
3212 void parse_events_terms__delete(struct list_head *terms)
3213 {
3214         if (!terms)
3215                 return;
3216         parse_events_terms__purge(terms);
3217         free(terms);
3218 }
3219
3220 void parse_events__clear_array(struct parse_events_array *a)
3221 {
3222         zfree(&a->ranges);
3223 }
3224
3225 void parse_events_evlist_error(struct parse_events_state *parse_state,
3226                                int idx, const char *str)
3227 {
3228         if (!parse_state->error)
3229                 return;
3230
3231         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3232 }
3233
3234 static void config_terms_list(char *buf, size_t buf_sz)
3235 {
3236         int i;
3237         bool first = true;
3238
3239         buf[0] = '\0';
3240         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3241                 const char *name = config_term_names[i];
3242
3243                 if (!config_term_avail(i, NULL))
3244                         continue;
3245                 if (!name)
3246                         continue;
3247                 if (name[0] == '<')
3248                         continue;
3249
3250                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3251                         return;
3252
3253                 if (!first)
3254                         strcat(buf, ",");
3255                 else
3256                         first = false;
3257                 strcat(buf, name);
3258         }
3259 }
3260
3261 /*
3262  * Return string contains valid config terms of an event.
3263  * @additional_terms: For terms such as PMU sysfs terms.
3264  */
3265 char *parse_events_formats_error_string(char *additional_terms)
3266 {
3267         char *str;
3268         /* "no-overwrite" is the longest name */
3269         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3270                           (sizeof("no-overwrite") - 1)];
3271
3272         config_terms_list(static_terms, sizeof(static_terms));
3273         /* valid terms */
3274         if (additional_terms) {
3275                 if (asprintf(&str, "valid terms: %s,%s",
3276                              additional_terms, static_terms) < 0)
3277                         goto fail;
3278         } else {
3279                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3280                         goto fail;
3281         }
3282         return str;
3283
3284 fail:
3285         return NULL;
3286 }
3287
3288 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx,
3289                                              struct perf_event_attr *attr,
3290                                              char *name, struct perf_pmu *pmu,
3291                                              struct list_head *config_terms)
3292 {
3293         return __add_event(list, idx, attr, true, name, pmu,
3294                            config_terms, false, NULL);
3295 }