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