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 "bpf-loader.h"
  23 #include "debug.h"
  24 #include <api/fs/tracing_path.h>
  25 #include <perf/cpumap.h>
  26 #include "parse-events-bison.h"
  27 #define YY_EXTRA_TYPE void*
  28 #include "parse-events-flex.h"
  29 #include "pmu.h"
  30 #include "thread_map.h"
  31 #include "probe-file.h"
  32 #include "asm/bug.h"
  33 #include "util/parse-branch-options.h"
  34 #include "metricgroup.h"
  35 #include "util/evsel_config.h"
  36 #include "util/event.h"
  37 #include "util/pfm.h"
  38 #include "util/parse-events-hybrid.h"
  39 #include "util/pmu-hybrid.h"
  40 #include "perf.h"
  41
  42 #define MAX_NAME_LEN 100
  43
  44 #ifdef PARSER_DEBUG
  45 extern int parse_events_debug;
  46 #endif
  47 int parse_events_parse(void *parse_state, void *scanner);
  48 static int get_config_terms(struct list_head *head_config,
  49                             struct list_head *head_terms __maybe_unused);
  50 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
  51                                          const char *str, char *pmu_name,
  52                                          struct list_head *list);
  53
  54 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  55 /*
  56  * The variable indicates the number of supported pmu event symbols.
  57  * 0 means not initialized and ready to init
  58  * -1 means failed to init, don't try anymore
  59  * >0 is the number of supported pmu event symbols
  60  */
  61 static int perf_pmu_events_list_num;
  62
  63 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  64         [PERF_COUNT_HW_CPU_CYCLES] = {
  65                 .symbol = "cpu-cycles",
  66                 .alias  = "cycles",
  67         },
  68         [PERF_COUNT_HW_INSTRUCTIONS] = {
  69                 .symbol = "instructions",
  70                 .alias  = "",
  71         },
  72         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  73                 .symbol = "cache-references",
  74                 .alias  = "",
  75         },
  76         [PERF_COUNT_HW_CACHE_MISSES] = {
  77                 .symbol = "cache-misses",
  78                 .alias  = "",
  79         },
  80         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  81                 .symbol = "branch-instructions",
  82                 .alias  = "branches",
  83         },
  84         [PERF_COUNT_HW_BRANCH_MISSES] = {
  85                 .symbol = "branch-misses",
  86                 .alias  = "",
  87         },
  88         [PERF_COUNT_HW_BUS_CYCLES] = {
  89                 .symbol = "bus-cycles",
  90                 .alias  = "",
  91         },
  92         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  93                 .symbol = "stalled-cycles-frontend",
  94                 .alias  = "idle-cycles-frontend",
  95         },
  96         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  97                 .symbol = "stalled-cycles-backend",
  98                 .alias  = "idle-cycles-backend",
  99         },
 100         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
 101                 .symbol = "ref-cycles",
 102                 .alias  = "",
 103         },
 104 };
 105
 106 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 107         [PERF_COUNT_SW_CPU_CLOCK] = {
 108                 .symbol = "cpu-clock",
 109                 .alias  = "",
 110         },
 111         [PERF_COUNT_SW_TASK_CLOCK] = {
 112                 .symbol = "task-clock",
 113                 .alias  = "",
 114         },
 115         [PERF_COUNT_SW_PAGE_FAULTS] = {
 116                 .symbol = "page-faults",
 117                 .alias  = "faults",
 118         },
 119         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 120                 .symbol = "context-switches",
 121                 .alias  = "cs",
 122         },
 123         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 124                 .symbol = "cpu-migrations",
 125                 .alias  = "migrations",
 126         },
 127         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 128                 .symbol = "minor-faults",
 129                 .alias  = "",
 130         },
 131         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 132                 .symbol = "major-faults",
 133                 .alias  = "",
 134         },
 135         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 136                 .symbol = "alignment-faults",
 137                 .alias  = "",
 138         },
 139         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 140                 .symbol = "emulation-faults",
 141                 .alias  = "",
 142         },
 143         [PERF_COUNT_SW_DUMMY] = {
 144                 .symbol = "dummy",
 145                 .alias  = "",
 146         },
 147         [PERF_COUNT_SW_BPF_OUTPUT] = {
 148                 .symbol = "bpf-output",
 149                 .alias  = "",
 150         },
 151         [PERF_COUNT_SW_CGROUP_SWITCHES] = {
 152                 .symbol = "cgroup-switches",
 153                 .alias  = "",
 154         },
 155 };
 156
 157 #define __PERF_EVENT_FIELD(config, name) \
 158         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 159
 160 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 161 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 162 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 163 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 164
 165 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 166         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 167                 if (sys_dirent->d_type == DT_DIR &&             \
 168                     (strcmp(sys_dirent->d_name, ".")) &&        \
 169                     (strcmp(sys_dirent->d_name, "..")))
 170
 171 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 172 {
 173         char evt_path[MAXPATHLEN];
 174         int fd;
 175
 176         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 177         fd = open(evt_path, O_RDONLY);
 178         if (fd < 0)
 179                 return -EINVAL;
 180         close(fd);
 181
 182         return 0;
 183 }
 184
 185 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 186         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 187                 if (evt_dirent->d_type == DT_DIR &&             \
 188                     (strcmp(evt_dirent->d_name, ".")) &&        \
 189                     (strcmp(evt_dirent->d_name, "..")) &&       \
 190                     (!tp_event_has_id(dir_path, evt_dirent)))
 191
 192 #define MAX_EVENT_LENGTH 512
 193
 194 void parse_events__handle_error(struct parse_events_error *err, int idx,
 195                                 char *str, char *help)
 196 {
 197         if (WARN(!str, "WARNING: failed to provide error string\n")) {
 198                 free(help);
 199                 return;
 200         }
 201         switch (err->num_errors) {
 202         case 0:
 203                 err->idx = idx;
 204                 err->str = str;
 205                 err->help = help;
 206                 break;
 207         case 1:
 208                 err->first_idx = err->idx;
 209                 err->idx = idx;
 210                 err->first_str = err->str;
 211                 err->str = str;
 212                 err->first_help = err->help;
 213                 err->help = help;
 214                 break;
 215         default:
 216                 pr_debug("Multiple errors dropping message: %s (%s)\n",
 217                         err->str, err->help);
 218                 free(err->str);
 219                 err->str = str;
 220                 free(err->help);
 221                 err->help = help;
 222                 break;
 223         }
 224         err->num_errors++;
 225 }
 226
 227 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 228 {
 229         struct tracepoint_path *path = NULL;
 230         DIR *sys_dir, *evt_dir;
 231         struct dirent *sys_dirent, *evt_dirent;
 232         char id_buf[24];
 233         int fd;
 234         u64 id;
 235         char evt_path[MAXPATHLEN];
 236         char *dir_path;
 237
 238         sys_dir = tracing_events__opendir();
 239         if (!sys_dir)
 240                 return NULL;
 241
 242         for_each_subsystem(sys_dir, sys_dirent) {
 243                 dir_path = get_events_file(sys_dirent->d_name);
 244                 if (!dir_path)
 245                         continue;
 246                 evt_dir = opendir(dir_path);
 247                 if (!evt_dir)
 248                         goto next;
 249
 250                 for_each_event(dir_path, evt_dir, evt_dirent) {
 251
 252                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 253                                   evt_dirent->d_name);
 254                         fd = open(evt_path, O_RDONLY);
 255                         if (fd < 0)
 256                                 continue;
 257                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 258                                 close(fd);
 259                                 continue;
 260                         }
 261                         close(fd);
 262                         id = atoll(id_buf);
 263                         if (id == config) {
 264                                 put_events_file(dir_path);
 265                                 closedir(evt_dir);
 266                                 closedir(sys_dir);
 267                                 path = zalloc(sizeof(*path));
 268                                 if (!path)
 269                                         return NULL;
 270                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 271                                         free(path);
 272                                         return NULL;
 273                                 }
 274                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 275                                         zfree(&path->system);
 276                                         free(path);
 277                                         return NULL;
 278                                 }
 279                                 return path;
 280                         }
 281                 }
 282                 closedir(evt_dir);
 283 next:
 284                 put_events_file(dir_path);
 285         }
 286
 287         closedir(sys_dir);
 288         return NULL;
 289 }
 290
 291 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 292 {
 293         struct tracepoint_path *path = zalloc(sizeof(*path));
 294         char *str = strchr(name, ':');
 295
 296         if (path == NULL || str == NULL) {
 297                 free(path);
 298                 return NULL;
 299         }
 300
 301         path->system = strndup(name, str - name);
 302         path->name = strdup(str+1);
 303
 304         if (path->system == NULL || path->name == NULL) {
 305                 zfree(&path->system);
 306                 zfree(&path->name);
 307                 zfree(&path);
 308         }
 309
 310         return path;
 311 }
 312
 313 const char *event_type(int type)
 314 {
 315         switch (type) {
 316         case PERF_TYPE_HARDWARE:
 317                 return "hardware";
 318
 319         case PERF_TYPE_SOFTWARE:
 320                 return "software";
 321
 322         case PERF_TYPE_TRACEPOINT:
 323                 return "tracepoint";
 324
 325         case PERF_TYPE_HW_CACHE:
 326                 return "hardware-cache";
 327
 328         default:
 329                 break;
 330         }
 331
 332         return "unknown";
 333 }
 334
 335 static int parse_events__is_name_term(struct parse_events_term *term)
 336 {
 337         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 338 }
 339
 340 static const char *get_config_name(struct list_head *head_terms)
 341 {
 342         struct parse_events_term *term;
 343
 344         if (!head_terms)
 345                 return NULL;
 346
 347         list_for_each_entry(term, head_terms, list)
 348                 if (parse_events__is_name_term(term))
 349                         return term->val.str;
 350
 351         return NULL;
 352 }
 353
 354 static struct evsel *
 355 __add_event(struct list_head *list, int *idx,
 356             struct perf_event_attr *attr,
 357             bool init_attr,
 358             const char *name, struct perf_pmu *pmu,
 359             struct list_head *config_terms, bool auto_merge_stats,
 360             const char *cpu_list)
 361 {
 362         struct evsel *evsel;
 363         struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
 364                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 365
 366         if (pmu && attr->type == PERF_TYPE_RAW)
 367                 perf_pmu__warn_invalid_config(pmu, attr->config, name);
 368
 369         if (init_attr)
 370                 event_attr_init(attr);
 371
 372         evsel = evsel__new_idx(attr, *idx);
 373         if (!evsel) {
 374                 perf_cpu_map__put(cpus);
 375                 return NULL;
 376         }
 377
 378         (*idx)++;
 379         evsel->core.cpus = cpus;
 380         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 381         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 382         evsel->auto_merge_stats = auto_merge_stats;
 383
 384         if (name)
 385                 evsel->name = strdup(name);
 386
 387         if (config_terms)
 388                 list_splice_init(config_terms, &evsel->config_terms);
 389
 390         if (list)
 391                 list_add_tail(&evsel->core.node, list);
 392
 393         return evsel;
 394 }
 395
 396 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
 397                                       const char *name, struct perf_pmu *pmu)
 398 {
 399         return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
 400                            NULL);
 401 }
 402
 403 static int add_event(struct list_head *list, int *idx,
 404                      struct perf_event_attr *attr, const char *name,
 405                      struct list_head *config_terms)
 406 {
 407         return __add_event(list, idx, attr, true, name, NULL, config_terms,
 408                            false, NULL) ? 0 : -ENOMEM;
 409 }
 410
 411 static int add_event_tool(struct list_head *list, int *idx,
 412                           enum perf_tool_event tool_event)
 413 {
 414         struct evsel *evsel;
 415         struct perf_event_attr attr = {
 416                 .type = PERF_TYPE_SOFTWARE,
 417                 .config = PERF_COUNT_SW_DUMMY,
 418         };
 419
 420         evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
 421                             "0");
 422         if (!evsel)
 423                 return -ENOMEM;
 424         evsel->tool_event = tool_event;
 425         if (tool_event == PERF_TOOL_DURATION_TIME)
 426                 evsel->unit = "ns";
 427         return 0;
 428 }
 429
 430 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
 431 {
 432         int i, j;
 433         int n, longest = -1;
 434
 435         for (i = 0; i < size; i++) {
 436                 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
 437                         n = strlen(names[i][j]);
 438                         if (n > longest && !strncasecmp(str, names[i][j], n))
 439                                 longest = n;
 440                 }
 441                 if (longest > 0)
 442                         return i;
 443         }
 444
 445         return -1;
 446 }
 447
 448 typedef int config_term_func_t(struct perf_event_attr *attr,
 449                                struct parse_events_term *term,
 450                                struct parse_events_error *err);
 451 static int config_term_common(struct perf_event_attr *attr,
 452                               struct parse_events_term *term,
 453                               struct parse_events_error *err);
 454 static int config_attr(struct perf_event_attr *attr,
 455                        struct list_head *head,
 456                        struct parse_events_error *err,
 457                        config_term_func_t config_term);
 458
 459 int parse_events_add_cache(struct list_head *list, int *idx,
 460                            char *type, char *op_result1, char *op_result2,
 461                            struct parse_events_error *err,
 462                            struct list_head *head_config,
 463                            struct parse_events_state *parse_state)
 464 {
 465         struct perf_event_attr attr;
 466         LIST_HEAD(config_terms);
 467         char name[MAX_NAME_LEN];
 468         const char *config_name;
 469         int cache_type = -1, cache_op = -1, cache_result = -1;
 470         char *op_result[2] = { op_result1, op_result2 };
 471         int i, n, ret;
 472         bool hybrid;
 473
 474         /*
 475          * No fallback - if we cannot get a clear cache type
 476          * then bail out:
 477          */
 478         cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 479         if (cache_type == -1)
 480                 return -EINVAL;
 481
 482         config_name = get_config_name(head_config);
 483         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 484
 485         for (i = 0; (i < 2) && (op_result[i]); i++) {
 486                 char *str = op_result[i];
 487
 488                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 489
 490                 if (cache_op == -1) {
 491                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 492                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 493                         if (cache_op >= 0) {
 494                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 495                                         return -EINVAL;
 496                                 continue;
 497                         }
 498                 }
 499
 500                 if (cache_result == -1) {
 501                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 502                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 503                         if (cache_result >= 0)
 504                                 continue;
 505                 }
 506         }
 507
 508         /*
 509          * Fall back to reads:
 510          */
 511         if (cache_op == -1)
 512                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 513
 514         /*
 515          * Fall back to accesses:
 516          */
 517         if (cache_result == -1)
 518                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 519
 520         memset(&attr, 0, sizeof(attr));
 521         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 522         attr.type = PERF_TYPE_HW_CACHE;
 523
 524         if (head_config) {
 525                 if (config_attr(&attr, head_config, err,
 526                                 config_term_common))
 527                         return -EINVAL;
 528
 529                 if (get_config_terms(head_config, &config_terms))
 530                         return -ENOMEM;
 531         }
 532
 533         ret = parse_events__add_cache_hybrid(list, idx, &attr,
 534                                              config_name ? : name, &config_terms,
 535                                              &hybrid, parse_state);
 536         if (hybrid)
 537                 goto out_free_terms;
 538
 539         ret = add_event(list, idx, &attr, config_name ? : name, &config_terms);
 540 out_free_terms:
 541         free_config_terms(&config_terms);
 542         return ret;
 543 }
 544
 545 static void tracepoint_error(struct parse_events_error *e, int err,
 546                              const char *sys, const char *name)
 547 {
 548         const char *str;
 549         char help[BUFSIZ];
 550
 551         if (!e)
 552                 return;
 553
 554         /*
 555          * We get error directly from syscall errno ( > 0),
 556          * or from encoded pointer's error ( < 0).
 557          */
 558         err = abs(err);
 559
 560         switch (err) {
 561         case EACCES:
 562                 str = "can't access trace events";
 563                 break;
 564         case ENOENT:
 565                 str = "unknown tracepoint";
 566                 break;
 567         default:
 568                 str = "failed to add tracepoint";
 569                 break;
 570         }
 571
 572         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 573         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 574 }
 575
 576 static int add_tracepoint(struct list_head *list, int *idx,
 577                           const char *sys_name, const char *evt_name,
 578                           struct parse_events_error *err,
 579                           struct list_head *head_config)
 580 {
 581         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 582
 583         if (IS_ERR(evsel)) {
 584                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 585                 return PTR_ERR(evsel);
 586         }
 587
 588         if (head_config) {
 589                 LIST_HEAD(config_terms);
 590
 591                 if (get_config_terms(head_config, &config_terms))
 592                         return -ENOMEM;
 593                 list_splice(&config_terms, &evsel->config_terms);
 594         }
 595
 596         list_add_tail(&evsel->core.node, list);
 597         return 0;
 598 }
 599
 600 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 601                                       const char *sys_name, const char *evt_name,
 602                                       struct parse_events_error *err,
 603                                       struct list_head *head_config)
 604 {
 605         char *evt_path;
 606         struct dirent *evt_ent;
 607         DIR *evt_dir;
 608         int ret = 0, found = 0;
 609
 610         evt_path = get_events_file(sys_name);
 611         if (!evt_path) {
 612                 tracepoint_error(err, errno, sys_name, evt_name);
 613                 return -1;
 614         }
 615         evt_dir = opendir(evt_path);
 616         if (!evt_dir) {
 617                 put_events_file(evt_path);
 618                 tracepoint_error(err, errno, sys_name, evt_name);
 619                 return -1;
 620         }
 621
 622         while (!ret && (evt_ent = readdir(evt_dir))) {
 623                 if (!strcmp(evt_ent->d_name, ".")
 624                     || !strcmp(evt_ent->d_name, "..")
 625                     || !strcmp(evt_ent->d_name, "enable")
 626                     || !strcmp(evt_ent->d_name, "filter"))
 627                         continue;
 628
 629                 if (!strglobmatch(evt_ent->d_name, evt_name))
 630                         continue;
 631
 632                 found++;
 633
 634                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 635                                      err, head_config);
 636         }
 637
 638         if (!found) {
 639                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 640                 ret = -1;
 641         }
 642
 643         put_events_file(evt_path);
 644         closedir(evt_dir);
 645         return ret;
 646 }
 647
 648 static int add_tracepoint_event(struct list_head *list, int *idx,
 649                                 const char *sys_name, const char *evt_name,
 650                                 struct parse_events_error *err,
 651                                 struct list_head *head_config)
 652 {
 653         return strpbrk(evt_name, "*?") ?
 654                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 655                                           err, head_config) :
 656                add_tracepoint(list, idx, sys_name, evt_name,
 657                               err, head_config);
 658 }
 659
 660 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 661                                     const char *sys_name, const char *evt_name,
 662                                     struct parse_events_error *err,
 663                                     struct list_head *head_config)
 664 {
 665         struct dirent *events_ent;
 666         DIR *events_dir;
 667         int ret = 0;
 668
 669         events_dir = tracing_events__opendir();
 670         if (!events_dir) {
 671                 tracepoint_error(err, errno, sys_name, evt_name);
 672                 return -1;
 673         }
 674
 675         while (!ret && (events_ent = readdir(events_dir))) {
 676                 if (!strcmp(events_ent->d_name, ".")
 677                     || !strcmp(events_ent->d_name, "..")
 678                     || !strcmp(events_ent->d_name, "enable")
 679                     || !strcmp(events_ent->d_name, "header_event")
 680                     || !strcmp(events_ent->d_name, "header_page"))
 681                         continue;
 682
 683                 if (!strglobmatch(events_ent->d_name, sys_name))
 684                         continue;
 685
 686                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 687                                            evt_name, err, head_config);
 688         }
 689
 690         closedir(events_dir);
 691         return ret;
 692 }
 693
 694 #ifdef HAVE_LIBBPF_SUPPORT
 695 struct __add_bpf_event_param {
 696         struct parse_events_state *parse_state;
 697         struct list_head *list;
 698         struct list_head *head_config;
 699 };
 700
 701 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 702                          void *_param)
 703 {
 704         LIST_HEAD(new_evsels);
 705         struct __add_bpf_event_param *param = _param;
 706         struct parse_events_state *parse_state = param->parse_state;
 707         struct list_head *list = param->list;
 708         struct evsel *pos;
 709         int err;
 710         /*
 711          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 712          * then don't add the tracepoint, this will be used for something else, like
 713          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 714          *
 715          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 716          */
 717         if (group[0] == '!')
 718                 return 0;
 719
 720         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 721                  group, event, fd);
 722
 723         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 724                                           event, parse_state->error,
 725                                           param->head_config);
 726         if (err) {
 727                 struct evsel *evsel, *tmp;
 728
 729                 pr_debug("Failed to add BPF event %s:%s\n",
 730                          group, event);
 731                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 732                         list_del_init(&evsel->core.node);
 733                         evsel__delete(evsel);
 734                 }
 735                 return err;
 736         }
 737         pr_debug("adding %s:%s\n", group, event);
 738
 739         list_for_each_entry(pos, &new_evsels, core.node) {
 740                 pr_debug("adding %s:%s to %p\n",
 741                          group, event, pos);
 742                 pos->bpf_fd = fd;
 743                 pos->bpf_obj = obj;
 744         }
 745         list_splice(&new_evsels, list);
 746         return 0;
 747 }
 748
 749 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 750                               struct list_head *list,
 751                               struct bpf_object *obj,
 752                               struct list_head *head_config)
 753 {
 754         int err;
 755         char errbuf[BUFSIZ];
 756         struct __add_bpf_event_param param = {parse_state, list, head_config};
 757         static bool registered_unprobe_atexit = false;
 758
 759         if (IS_ERR(obj) || !obj) {
 760                 snprintf(errbuf, sizeof(errbuf),
 761                          "Internal error: load bpf obj with NULL");
 762                 err = -EINVAL;
 763                 goto errout;
 764         }
 765
 766         /*
 767          * Register atexit handler before calling bpf__probe() so
 768          * bpf__probe() don't need to unprobe probe points its already
 769          * created when failure.
 770          */
 771         if (!registered_unprobe_atexit) {
 772                 atexit(bpf__clear);
 773                 registered_unprobe_atexit = true;
 774         }
 775
 776         err = bpf__probe(obj);
 777         if (err) {
 778                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 779                 goto errout;
 780         }
 781
 782         err = bpf__load(obj);
 783         if (err) {
 784                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 785                 goto errout;
 786         }
 787
 788         err = bpf__foreach_event(obj, add_bpf_event, &param);
 789         if (err) {
 790                 snprintf(errbuf, sizeof(errbuf),
 791                          "Attach events in BPF object failed");
 792                 goto errout;
 793         }
 794
 795         return 0;
 796 errout:
 797         parse_events__handle_error(parse_state->error, 0,
 798                                 strdup(errbuf), strdup("(add -v to see detail)"));
 799         return err;
 800 }
 801
 802 static int
 803 parse_events_config_bpf(struct parse_events_state *parse_state,
 804                         struct bpf_object *obj,
 805                         struct list_head *head_config)
 806 {
 807         struct parse_events_term *term;
 808         int error_pos;
 809
 810         if (!head_config || list_empty(head_config))
 811                 return 0;
 812
 813         list_for_each_entry(term, head_config, list) {
 814                 int err;
 815
 816                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 817                         parse_events__handle_error(parse_state->error, term->err_term,
 818                                                 strdup("Invalid config term for BPF object"),
 819                                                 NULL);
 820                         return -EINVAL;
 821                 }
 822
 823                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 824                 if (err) {
 825                         char errbuf[BUFSIZ];
 826                         int idx;
 827
 828                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 829                                                  &error_pos, err, errbuf,
 830                                                  sizeof(errbuf));
 831
 832                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 833                                 idx = term->err_val;
 834                         else
 835                                 idx = term->err_term + error_pos;
 836
 837                         parse_events__handle_error(parse_state->error, idx,
 838                                                 strdup(errbuf),
 839                                                 strdup(
 840 "Hint:\tValid config terms:\n"
 841 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 842 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 843 "\n"
 844 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 845 "     \t(add -v to see detail)"));
 846                         return err;
 847                 }
 848         }
 849         return 0;
 850 }
 851
 852 /*
 853  * Split config terms:
 854  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 855  *  'call-graph=fp' is 'evt config', should be applied to each
 856  *  events in bpf.c.
 857  * 'map:array.value[0]=1' is 'obj config', should be processed
 858  * with parse_events_config_bpf.
 859  *
 860  * Move object config terms from the first list to obj_head_config.
 861  */
 862 static void
 863 split_bpf_config_terms(struct list_head *evt_head_config,
 864                        struct list_head *obj_head_config)
 865 {
 866         struct parse_events_term *term, *temp;
 867
 868         /*
 869          * Currently, all possible user config term
 870          * belong to bpf object. parse_events__is_hardcoded_term()
 871          * happens to be a good flag.
 872          *
 873          * See parse_events_config_bpf() and
 874          * config_term_tracepoint().
 875          */
 876         list_for_each_entry_safe(term, temp, evt_head_config, list)
 877                 if (!parse_events__is_hardcoded_term(term))
 878                         list_move_tail(&term->list, obj_head_config);
 879 }
 880
 881 int parse_events_load_bpf(struct parse_events_state *parse_state,
 882                           struct list_head *list,
 883                           char *bpf_file_name,
 884                           bool source,
 885                           struct list_head *head_config)
 886 {
 887         int err;
 888         struct bpf_object *obj;
 889         LIST_HEAD(obj_head_config);
 890
 891         if (head_config)
 892                 split_bpf_config_terms(head_config, &obj_head_config);
 893
 894         obj = bpf__prepare_load(bpf_file_name, source);
 895         if (IS_ERR(obj)) {
 896                 char errbuf[BUFSIZ];
 897
 898                 err = PTR_ERR(obj);
 899
 900                 if (err == -ENOTSUP)
 901                         snprintf(errbuf, sizeof(errbuf),
 902                                  "BPF support is not compiled");
 903                 else
 904                         bpf__strerror_prepare_load(bpf_file_name,
 905                                                    source,
 906                                                    -err, errbuf,
 907                                                    sizeof(errbuf));
 908
 909                 parse_events__handle_error(parse_state->error, 0,
 910                                         strdup(errbuf), strdup("(add -v to see detail)"));
 911                 return err;
 912         }
 913
 914         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 915         if (err)
 916                 return err;
 917         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 918
 919         /*
 920          * Caller doesn't know anything about obj_head_config,
 921          * so combine them together again before returning.
 922          */
 923         if (head_config)
 924                 list_splice_tail(&obj_head_config, head_config);
 925         return err;
 926 }
 927 #else // HAVE_LIBBPF_SUPPORT
 928 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 929                               struct list_head *list __maybe_unused,
 930                               struct bpf_object *obj __maybe_unused,
 931                               struct list_head *head_config __maybe_unused)
 932 {
 933         parse_events__handle_error(parse_state->error, 0,
 934                                    strdup("BPF support is not compiled"),
 935                                    strdup("Make sure libbpf-devel is available at build time."));
 936         return -ENOTSUP;
 937 }
 938
 939 int parse_events_load_bpf(struct parse_events_state *parse_state,
 940                           struct list_head *list __maybe_unused,
 941                           char *bpf_file_name __maybe_unused,
 942                           bool source __maybe_unused,
 943                           struct list_head *head_config __maybe_unused)
 944 {
 945         parse_events__handle_error(parse_state->error, 0,
 946                                    strdup("BPF support is not compiled"),
 947                                    strdup("Make sure libbpf-devel is available at build time."));
 948         return -ENOTSUP;
 949 }
 950 #endif // HAVE_LIBBPF_SUPPORT
 951
 952 static int
 953 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 954 {
 955         int i;
 956
 957         for (i = 0; i < 3; i++) {
 958                 if (!type || !type[i])
 959                         break;
 960
 961 #define CHECK_SET_TYPE(bit)             \
 962 do {                                    \
 963         if (attr->bp_type & bit)        \
 964                 return -EINVAL;         \
 965         else                            \
 966                 attr->bp_type |= bit;   \
 967 } while (0)
 968
 969                 switch (type[i]) {
 970                 case 'r':
 971                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 972                         break;
 973                 case 'w':
 974                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 975                         break;
 976                 case 'x':
 977                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 978                         break;
 979                 default:
 980                         return -EINVAL;
 981                 }
 982         }
 983
 984 #undef CHECK_SET_TYPE
 985
 986         if (!attr->bp_type) /* Default */
 987                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 988
 989         return 0;
 990 }
 991
 992 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 993                                 u64 addr, char *type, u64 len)
 994 {
 995         struct perf_event_attr attr;
 996
 997         memset(&attr, 0, sizeof(attr));
 998         attr.bp_addr = addr;
 999
1000         if (parse_breakpoint_type(type, &attr))
1001                 return -EINVAL;
1002
1003         /* Provide some defaults if len is not specified */
1004         if (!len) {
1005                 if (attr.bp_type == HW_BREAKPOINT_X)
1006                         len = sizeof(long);
1007                 else
1008                         len = HW_BREAKPOINT_LEN_4;
1009         }
1010
1011         attr.bp_len = len;
1012
1013         attr.type = PERF_TYPE_BREAKPOINT;
1014         attr.sample_period = 1;
1015
1016         return add_event(list, idx, &attr, NULL, NULL);
1017 }
1018
1019 static int check_type_val(struct parse_events_term *term,
1020                           struct parse_events_error *err,
1021                           int type)
1022 {
1023         if (type == term->type_val)
1024                 return 0;
1025
1026         if (err) {
1027                 parse_events__handle_error(err, term->err_val,
1028                                         type == PARSE_EVENTS__TERM_TYPE_NUM
1029                                         ? strdup("expected numeric value")
1030                                         : strdup("expected string value"),
1031                                         NULL);
1032         }
1033         return -EINVAL;
1034 }
1035
1036 /*
1037  * Update according to parse-events.l
1038  */
1039 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1040         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
1041         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
1042         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
1043         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
1044         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
1045         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
1046         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
1047         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
1048         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
1049         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
1050         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
1051         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
1052         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1053         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1054         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1055         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1056         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1057         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1058         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1059         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1060         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1061 };
1062
1063 static bool config_term_shrinked;
1064
1065 static bool
1066 config_term_avail(int term_type, struct parse_events_error *err)
1067 {
1068         char *err_str;
1069
1070         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1071                 parse_events__handle_error(err, -1,
1072                                         strdup("Invalid term_type"), NULL);
1073                 return false;
1074         }
1075         if (!config_term_shrinked)
1076                 return true;
1077
1078         switch (term_type) {
1079         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1080         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1081         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1082         case PARSE_EVENTS__TERM_TYPE_NAME:
1083         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1084         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1085                 return true;
1086         default:
1087                 if (!err)
1088                         return false;
1089
1090                 /* term_type is validated so indexing is safe */
1091                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1092                                 config_term_names[term_type]) >= 0)
1093                         parse_events__handle_error(err, -1, err_str, NULL);
1094                 return false;
1095         }
1096 }
1097
1098 void parse_events__shrink_config_terms(void)
1099 {
1100         config_term_shrinked = true;
1101 }
1102
1103 static int config_term_common(struct perf_event_attr *attr,
1104                               struct parse_events_term *term,
1105                               struct parse_events_error *err)
1106 {
1107 #define CHECK_TYPE_VAL(type)                                               \
1108 do {                                                                       \
1109         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1110                 return -EINVAL;                                            \
1111 } while (0)
1112
1113         switch (term->type_term) {
1114         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1115                 CHECK_TYPE_VAL(NUM);
1116                 attr->config = term->val.num;
1117                 break;
1118         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1119                 CHECK_TYPE_VAL(NUM);
1120                 attr->config1 = term->val.num;
1121                 break;
1122         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1123                 CHECK_TYPE_VAL(NUM);
1124                 attr->config2 = term->val.num;
1125                 break;
1126         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1127                 CHECK_TYPE_VAL(NUM);
1128                 break;
1129         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1130                 CHECK_TYPE_VAL(NUM);
1131                 break;
1132         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1133                 CHECK_TYPE_VAL(STR);
1134                 if (strcmp(term->val.str, "no") &&
1135                     parse_branch_str(term->val.str,
1136                                     &attr->branch_sample_type)) {
1137                         parse_events__handle_error(err, term->err_val,
1138                                         strdup("invalid branch sample type"),
1139                                         NULL);
1140                         return -EINVAL;
1141                 }
1142                 break;
1143         case PARSE_EVENTS__TERM_TYPE_TIME:
1144                 CHECK_TYPE_VAL(NUM);
1145                 if (term->val.num > 1) {
1146                         parse_events__handle_error(err, term->err_val,
1147                                                 strdup("expected 0 or 1"),
1148                                                 NULL);
1149                         return -EINVAL;
1150                 }
1151                 break;
1152         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1153                 CHECK_TYPE_VAL(STR);
1154                 break;
1155         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1156                 CHECK_TYPE_VAL(NUM);
1157                 break;
1158         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1159                 CHECK_TYPE_VAL(NUM);
1160                 break;
1161         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1162                 CHECK_TYPE_VAL(NUM);
1163                 break;
1164         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1165                 CHECK_TYPE_VAL(NUM);
1166                 break;
1167         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1168                 CHECK_TYPE_VAL(NUM);
1169                 break;
1170         case PARSE_EVENTS__TERM_TYPE_NAME:
1171                 CHECK_TYPE_VAL(STR);
1172                 break;
1173         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1174                 CHECK_TYPE_VAL(NUM);
1175                 break;
1176         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1177                 CHECK_TYPE_VAL(NUM);
1178                 break;
1179         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1180                 CHECK_TYPE_VAL(NUM);
1181                 if ((unsigned int)term->val.num > 1) {
1182                         parse_events__handle_error(err, term->err_val,
1183                                                 strdup("expected 0 or 1"),
1184                                                 NULL);
1185                         return -EINVAL;
1186                 }
1187                 break;
1188         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1189                 CHECK_TYPE_VAL(NUM);
1190                 break;
1191         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1192                 CHECK_TYPE_VAL(NUM);
1193                 if (term->val.num > UINT_MAX) {
1194                         parse_events__handle_error(err, term->err_val,
1195                                                 strdup("too big"),
1196                                                 NULL);
1197                         return -EINVAL;
1198                 }
1199                 break;
1200         default:
1201                 parse_events__handle_error(err, term->err_term,
1202                                 strdup("unknown term"),
1203                                 parse_events_formats_error_string(NULL));
1204                 return -EINVAL;
1205         }
1206
1207         /*
1208          * Check term availability after basic checking so
1209          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1210          *
1211          * If check availability at the entry of this function,
1212          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1213          * if an invalid config term is provided for legacy events
1214          * (for example, instructions/badterm/...), which is confusing.
1215          */
1216         if (!config_term_avail(term->type_term, err))
1217                 return -EINVAL;
1218         return 0;
1219 #undef CHECK_TYPE_VAL
1220 }
1221
1222 static int config_term_pmu(struct perf_event_attr *attr,
1223                            struct parse_events_term *term,
1224                            struct parse_events_error *err)
1225 {
1226         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1227             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1228                 /*
1229                  * Always succeed for sysfs terms, as we dont know
1230                  * at this point what type they need to have.
1231                  */
1232                 return 0;
1233         else
1234                 return config_term_common(attr, term, err);
1235 }
1236
1237 static int config_term_tracepoint(struct perf_event_attr *attr,
1238                                   struct parse_events_term *term,
1239                                   struct parse_events_error *err)
1240 {
1241         switch (term->type_term) {
1242         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1243         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1244         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1245         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1246         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1247         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1248         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1249         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1250         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1251         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1252                 return config_term_common(attr, term, err);
1253         default:
1254                 if (err) {
1255                         parse_events__handle_error(err, term->err_term,
1256                                 strdup("unknown term"),
1257                                 strdup("valid terms: call-graph,stack-size\n"));
1258                 }
1259                 return -EINVAL;
1260         }
1261
1262         return 0;
1263 }
1264
1265 static int config_attr(struct perf_event_attr *attr,
1266                        struct list_head *head,
1267                        struct parse_events_error *err,
1268                        config_term_func_t config_term)
1269 {
1270         struct parse_events_term *term;
1271
1272         list_for_each_entry(term, head, list)
1273                 if (config_term(attr, term, err))
1274                         return -EINVAL;
1275
1276         return 0;
1277 }
1278
1279 static int get_config_terms(struct list_head *head_config,
1280                             struct list_head *head_terms __maybe_unused)
1281 {
1282 #define ADD_CONFIG_TERM(__type, __weak)                         \
1283         struct evsel_config_term *__t;                  \
1284                                                                 \
1285         __t = zalloc(sizeof(*__t));                             \
1286         if (!__t)                                               \
1287                 return -ENOMEM;                                 \
1288                                                                 \
1289         INIT_LIST_HEAD(&__t->list);                             \
1290         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1291         __t->weak       = __weak;                               \
1292         list_add_tail(&__t->list, head_terms)
1293
1294 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1295 do {                                                            \
1296         ADD_CONFIG_TERM(__type, __weak);                        \
1297         __t->val.__name = __val;                                \
1298 } while (0)
1299
1300 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1301 do {                                                            \
1302         ADD_CONFIG_TERM(__type, __weak);                        \
1303         __t->val.str = strdup(__val);                           \
1304         if (!__t->val.str) {                                    \
1305                 zfree(&__t);                                    \
1306                 return -ENOMEM;                                 \
1307         }                                                       \
1308         __t->free_str = true;                                   \
1309 } while (0)
1310
1311         struct parse_events_term *term;
1312
1313         list_for_each_entry(term, head_config, list) {
1314                 switch (term->type_term) {
1315                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1316                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1317                         break;
1318                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1319                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1320                         break;
1321                 case PARSE_EVENTS__TERM_TYPE_TIME:
1322                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1323                         break;
1324                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1325                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1326                         break;
1327                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1328                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1329                         break;
1330                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1331                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1332                                             term->val.num, term->weak);
1333                         break;
1334                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1335                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1336                                             term->val.num ? 1 : 0, term->weak);
1337                         break;
1338                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1339                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1340                                             term->val.num ? 0 : 1, term->weak);
1341                         break;
1342                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1343                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1344                                             term->val.num, term->weak);
1345                         break;
1346                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1347                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1348                                             term->val.num, term->weak);
1349                         break;
1350                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1351                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1352                                             term->val.num ? 1 : 0, term->weak);
1353                         break;
1354                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1355                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1356                                             term->val.num ? 0 : 1, term->weak);
1357                         break;
1358                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1359                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1360                         break;
1361                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1362                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1363                                             term->val.num ? true : false, term->weak);
1364                         break;
1365                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1366                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1367                                             term->val.num ? 1 : 0, term->weak);
1368                         break;
1369                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1370                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1371                                             term->val.num, term->weak);
1372                         break;
1373                 default:
1374                         break;
1375                 }
1376         }
1377         return 0;
1378 }
1379
1380 /*
1381  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1382  * each bit of attr->config that the user has changed.
1383  */
1384 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1385                            struct list_head *head_terms)
1386 {
1387         struct parse_events_term *term;
1388         u64 bits = 0;
1389         int type;
1390
1391         list_for_each_entry(term, head_config, list) {
1392                 switch (term->type_term) {
1393                 case PARSE_EVENTS__TERM_TYPE_USER:
1394                         type = perf_pmu__format_type(&pmu->format, term->config);
1395                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1396                                 continue;
1397                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1398                         break;
1399                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1400                         bits = ~(u64)0;
1401                         break;
1402                 default:
1403                         break;
1404                 }
1405         }
1406
1407         if (bits)
1408                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1409
1410 #undef ADD_CONFIG_TERM
1411         return 0;
1412 }
1413
1414 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1415                                 const char *sys, const char *event,
1416                                 struct parse_events_error *err,
1417                                 struct list_head *head_config)
1418 {
1419         if (head_config) {
1420                 struct perf_event_attr attr;
1421
1422                 if (config_attr(&attr, head_config, err,
1423                                 config_term_tracepoint))
1424                         return -EINVAL;
1425         }
1426
1427         if (strpbrk(sys, "*?"))
1428                 return add_tracepoint_multi_sys(list, idx, sys, event,
1429                                                 err, head_config);
1430         else
1431                 return add_tracepoint_event(list, idx, sys, event,
1432                                             err, head_config);
1433 }
1434
1435 int parse_events_add_numeric(struct parse_events_state *parse_state,
1436                              struct list_head *list,
1437                              u32 type, u64 config,
1438                              struct list_head *head_config)
1439 {
1440         struct perf_event_attr attr;
1441         LIST_HEAD(config_terms);
1442         bool hybrid;
1443         int ret;
1444
1445         memset(&attr, 0, sizeof(attr));
1446         attr.type = type;
1447         attr.config = config;
1448
1449         if (head_config) {
1450                 if (config_attr(&attr, head_config, parse_state->error,
1451                                 config_term_common))
1452                         return -EINVAL;
1453
1454                 if (get_config_terms(head_config, &config_terms))
1455                         return -ENOMEM;
1456         }
1457
1458         ret = parse_events__add_numeric_hybrid(parse_state, list, &attr,
1459                                                get_config_name(head_config),
1460                                                &config_terms, &hybrid);
1461         if (hybrid)
1462                 goto out_free_terms;
1463
1464         ret = add_event(list, &parse_state->idx, &attr,
1465                         get_config_name(head_config), &config_terms);
1466 out_free_terms:
1467         free_config_terms(&config_terms);
1468         return ret;
1469 }
1470
1471 int parse_events_add_tool(struct parse_events_state *parse_state,
1472                           struct list_head *list,
1473                           int tool_event)
1474 {
1475         return add_event_tool(list, &parse_state->idx, tool_event);
1476 }
1477
1478 static bool config_term_percore(struct list_head *config_terms)
1479 {
1480         struct evsel_config_term *term;
1481
1482         list_for_each_entry(term, config_terms, list) {
1483                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1484                         return term->val.percore;
1485         }
1486
1487         return false;
1488 }
1489
1490 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state,
1491                                            struct list_head *list, char *name,
1492                                            struct list_head *head_config)
1493 {
1494         struct parse_events_term *term;
1495         int ret = -1;
1496
1497         if (parse_state->fake_pmu || !head_config || list_empty(head_config) ||
1498             !perf_pmu__is_hybrid(name)) {
1499                 return -1;
1500         }
1501
1502         /*
1503          * More than one term in list.
1504          */
1505         if (head_config->next && head_config->next->next != head_config)
1506                 return -1;
1507
1508         term = list_first_entry(head_config, struct parse_events_term, list);
1509         if (term && term->config && strcmp(term->config, "event")) {
1510                 ret = parse_events__with_hybrid_pmu(parse_state, term->config,
1511                                                     name, list);
1512         }
1513
1514         return ret;
1515 }
1516
1517 int parse_events_add_pmu(struct parse_events_state *parse_state,
1518                          struct list_head *list, char *name,
1519                          struct list_head *head_config,
1520                          bool auto_merge_stats,
1521                          bool use_alias)
1522 {
1523         struct perf_event_attr attr;
1524         struct perf_pmu_info info;
1525         struct perf_pmu *pmu;
1526         struct evsel *evsel;
1527         struct parse_events_error *err = parse_state->error;
1528         bool use_uncore_alias;
1529         LIST_HEAD(config_terms);
1530
1531         if (verbose > 1) {
1532                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1533                         name);
1534                 if (head_config) {
1535                         struct parse_events_term *term;
1536
1537                         list_for_each_entry(term, head_config, list) {
1538                                 fprintf(stderr, "%s,", term->config);
1539                         }
1540                 }
1541                 fprintf(stderr, "' that may result in non-fatal errors\n");
1542         }
1543
1544         pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1545         if (!pmu) {
1546                 char *err_str;
1547
1548                 if (asprintf(&err_str,
1549                                 "Cannot find PMU `%s'. Missing kernel support?",
1550                                 name) >= 0)
1551                         parse_events__handle_error(err, 0, err_str, NULL);
1552                 return -EINVAL;
1553         }
1554
1555         if (pmu->default_config) {
1556                 memcpy(&attr, pmu->default_config,
1557                        sizeof(struct perf_event_attr));
1558         } else {
1559                 memset(&attr, 0, sizeof(attr));
1560         }
1561
1562         use_uncore_alias = (pmu->is_uncore && use_alias);
1563
1564         if (!head_config) {
1565                 attr.type = pmu->type;
1566                 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1567                                     pmu, NULL, auto_merge_stats, NULL);
1568                 if (evsel) {
1569                         evsel->pmu_name = name ? strdup(name) : NULL;
1570                         evsel->use_uncore_alias = use_uncore_alias;
1571                         return 0;
1572                 } else {
1573                         return -ENOMEM;
1574                 }
1575         }
1576
1577         if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1578                 return -EINVAL;
1579
1580         if (verbose > 1) {
1581                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1582                         name);
1583                 if (head_config) {
1584                         struct parse_events_term *term;
1585
1586                         list_for_each_entry(term, head_config, list) {
1587                                 fprintf(stderr, "%s,", term->config);
1588                         }
1589                 }
1590                 fprintf(stderr, "' that may result in non-fatal errors\n");
1591         }
1592
1593         /*
1594          * Configure hardcoded terms first, no need to check
1595          * return value when called with fail == 0 ;)
1596          */
1597         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1598                 return -EINVAL;
1599
1600         if (get_config_terms(head_config, &config_terms))
1601                 return -ENOMEM;
1602
1603         /*
1604          * When using default config, record which bits of attr->config were
1605          * changed by the user.
1606          */
1607         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1608                 return -ENOMEM;
1609
1610         if (!parse_events__inside_hybrid_pmu(parse_state, list, name,
1611                                              head_config)) {
1612                 return 0;
1613         }
1614
1615         if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1616                 free_config_terms(&config_terms);
1617                 return -EINVAL;
1618         }
1619
1620         evsel = __add_event(list, &parse_state->idx, &attr, true,
1621                             get_config_name(head_config), pmu,
1622                             &config_terms, auto_merge_stats, NULL);
1623         if (!evsel)
1624                 return -ENOMEM;
1625
1626         if (evsel->name)
1627                 evsel->use_config_name = true;
1628
1629         evsel->pmu_name = name ? strdup(name) : NULL;
1630         evsel->use_uncore_alias = use_uncore_alias;
1631         evsel->percore = config_term_percore(&evsel->config_terms);
1632
1633         if (parse_state->fake_pmu)
1634                 return 0;
1635
1636         evsel->unit = info.unit;
1637         evsel->scale = info.scale;
1638         evsel->per_pkg = info.per_pkg;
1639         evsel->snapshot = info.snapshot;
1640         evsel->metric_expr = info.metric_expr;
1641         evsel->metric_name = info.metric_name;
1642         return 0;
1643 }
1644
1645 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1646                                char *str, struct list_head **listp)
1647 {
1648         struct parse_events_term *term;
1649         struct list_head *list;
1650         struct perf_pmu *pmu = NULL;
1651         int ok = 0;
1652
1653         *listp = NULL;
1654         /* Add it for all PMUs that support the alias */
1655         list = malloc(sizeof(struct list_head));
1656         if (!list)
1657                 return -1;
1658         INIT_LIST_HEAD(list);
1659         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1660                 struct perf_pmu_alias *alias;
1661
1662                 list_for_each_entry(alias, &pmu->aliases, list) {
1663                         if (!strcasecmp(alias->name, str)) {
1664                                 struct list_head *head;
1665                                 char *config;
1666
1667                                 head = malloc(sizeof(struct list_head));
1668                                 if (!head)
1669                                         return -1;
1670                                 INIT_LIST_HEAD(head);
1671                                 config = strdup(str);
1672                                 if (!config)
1673                                         return -1;
1674                                 if (parse_events_term__num(&term,
1675                                                    PARSE_EVENTS__TERM_TYPE_USER,
1676                                                    config, 1, false, &config,
1677                                                    NULL) < 0) {
1678                                         free(list);
1679                                         free(config);
1680                                         return -1;
1681                                 }
1682                                 list_add_tail(&term->list, head);
1683
1684                                 if (!parse_events_add_pmu(parse_state, list,
1685                                                           pmu->name, head,
1686                                                           true, true)) {
1687                                         pr_debug("%s -> %s/%s/\n", str,
1688                                                  pmu->name, alias->str);
1689                                         ok++;
1690                                 }
1691
1692                                 parse_events_terms__delete(head);
1693                         }
1694                 }
1695         }
1696         if (!ok) {
1697                 free(list);
1698                 return -1;
1699         }
1700         *listp = list;
1701         return 0;
1702 }
1703
1704 int parse_events__modifier_group(struct list_head *list,
1705                                  char *event_mod)
1706 {
1707         return parse_events__modifier_event(list, event_mod, true);
1708 }
1709
1710 /*
1711  * Check if the two uncore PMUs are from the same uncore block
1712  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1713  */
1714 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1715 {
1716         char *end_a, *end_b;
1717
1718         end_a = strrchr(pmu_name_a, '_');
1719         end_b = strrchr(pmu_name_b, '_');
1720
1721         if (!end_a || !end_b)
1722                 return false;
1723
1724         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1725                 return false;
1726
1727         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1728 }
1729
1730 static int
1731 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1732                                            struct parse_events_state *parse_state)
1733 {
1734         struct evsel *evsel, *leader;
1735         uintptr_t *leaders;
1736         bool is_leader = true;
1737         int i, nr_pmu = 0, total_members, ret = 0;
1738
1739         leader = list_first_entry(list, struct evsel, core.node);
1740         evsel = list_last_entry(list, struct evsel, core.node);
1741         total_members = evsel->core.idx - leader->core.idx + 1;
1742
1743         leaders = calloc(total_members, sizeof(uintptr_t));
1744         if (WARN_ON(!leaders))
1745                 return 0;
1746
1747         /*
1748          * Going through the whole group and doing sanity check.
1749          * All members must use alias, and be from the same uncore block.
1750          * Also, storing the leader events in an array.
1751          */
1752         __evlist__for_each_entry(list, evsel) {
1753
1754                 /* Only split the uncore group which members use alias */
1755                 if (!evsel->use_uncore_alias)
1756                         goto out;
1757
1758                 /* The events must be from the same uncore block */
1759                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1760                         goto out;
1761
1762                 if (!is_leader)
1763                         continue;
1764                 /*
1765                  * If the event's PMU name starts to repeat, it must be a new
1766                  * event. That can be used to distinguish the leader from
1767                  * other members, even they have the same event name.
1768                  */
1769                 if ((leader != evsel) &&
1770                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1771                         is_leader = false;
1772                         continue;
1773                 }
1774
1775                 /* Store the leader event for each PMU */
1776                 leaders[nr_pmu++] = (uintptr_t) evsel;
1777         }
1778
1779         /* only one event alias */
1780         if (nr_pmu == total_members) {
1781                 parse_state->nr_groups--;
1782                 goto handled;
1783         }
1784
1785         /*
1786          * An uncore event alias is a joint name which means the same event
1787          * runs on all PMUs of a block.
1788          * Perf doesn't support mixed events from different PMUs in the same
1789          * group. The big group has to be split into multiple small groups
1790          * which only include the events from the same PMU.
1791          *
1792          * Here the uncore event aliases must be from the same uncore block.
1793          * The number of PMUs must be same for each alias. The number of new
1794          * small groups equals to the number of PMUs.
1795          * Setting the leader event for corresponding members in each group.
1796          */
1797         i = 0;
1798         __evlist__for_each_entry(list, evsel) {
1799                 if (i >= nr_pmu)
1800                         i = 0;
1801                 evsel__set_leader(evsel, (struct evsel *) leaders[i++]);
1802         }
1803
1804         /* The number of members and group name are same for each group */
1805         for (i = 0; i < nr_pmu; i++) {
1806                 evsel = (struct evsel *) leaders[i];
1807                 evsel->core.nr_members = total_members / nr_pmu;
1808                 evsel->group_name = name ? strdup(name) : NULL;
1809         }
1810
1811         /* Take the new small groups into account */
1812         parse_state->nr_groups += nr_pmu - 1;
1813
1814 handled:
1815         ret = 1;
1816 out:
1817         free(leaders);
1818         return ret;
1819 }
1820
1821 void parse_events__set_leader(char *name, struct list_head *list,
1822                               struct parse_events_state *parse_state)
1823 {
1824         struct evsel *leader;
1825
1826         if (list_empty(list)) {
1827                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1828                 return;
1829         }
1830
1831         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1832                 return;
1833
1834         __perf_evlist__set_leader(list);
1835         leader = list_entry(list->next, struct evsel, core.node);
1836         leader->group_name = name ? strdup(name) : NULL;
1837 }
1838
1839 /* list_event is assumed to point to malloc'ed memory */
1840 void parse_events_update_lists(struct list_head *list_event,
1841                                struct list_head *list_all)
1842 {
1843         /*
1844          * Called for single event definition. Update the
1845          * 'all event' list, and reinit the 'single event'
1846          * list, for next event definition.
1847          */
1848         list_splice_tail(list_event, list_all);
1849         free(list_event);
1850 }
1851
1852 struct event_modifier {
1853         int eu;
1854         int ek;
1855         int eh;
1856         int eH;
1857         int eG;
1858         int eI;
1859         int precise;
1860         int precise_max;
1861         int exclude_GH;
1862         int sample_read;
1863         int pinned;
1864         int weak;
1865         int exclusive;
1866         int bpf_counter;
1867 };
1868
1869 static int get_event_modifier(struct event_modifier *mod, char *str,
1870                                struct evsel *evsel)
1871 {
1872         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1873         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1874         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1875         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1876         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1877         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1878         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1879         int precise_max = 0;
1880         int sample_read = 0;
1881         int pinned = evsel ? evsel->core.attr.pinned : 0;
1882         int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1883
1884         int exclude = eu | ek | eh;
1885         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1886         int weak = 0;
1887         int bpf_counter = 0;
1888
1889         memset(mod, 0, sizeof(*mod));
1890
1891         while (*str) {
1892                 if (*str == 'u') {
1893                         if (!exclude)
1894                                 exclude = eu = ek = eh = 1;
1895                         if (!exclude_GH && !perf_guest)
1896                                 eG = 1;
1897                         eu = 0;
1898                 } else if (*str == 'k') {
1899                         if (!exclude)
1900                                 exclude = eu = ek = eh = 1;
1901                         ek = 0;
1902                 } else if (*str == 'h') {
1903                         if (!exclude)
1904                                 exclude = eu = ek = eh = 1;
1905                         eh = 0;
1906                 } else if (*str == 'G') {
1907                         if (!exclude_GH)
1908                                 exclude_GH = eG = eH = 1;
1909                         eG = 0;
1910                 } else if (*str == 'H') {
1911                         if (!exclude_GH)
1912                                 exclude_GH = eG = eH = 1;
1913                         eH = 0;
1914                 } else if (*str == 'I') {
1915                         eI = 1;
1916                 } else if (*str == 'p') {
1917                         precise++;
1918                         /* use of precise requires exclude_guest */
1919                         if (!exclude_GH)
1920                                 eG = 1;
1921                 } else if (*str == 'P') {
1922                         precise_max = 1;
1923                 } else if (*str == 'S') {
1924                         sample_read = 1;
1925                 } else if (*str == 'D') {
1926                         pinned = 1;
1927                 } else if (*str == 'e') {
1928                         exclusive = 1;
1929                 } else if (*str == 'W') {
1930                         weak = 1;
1931                 } else if (*str == 'b') {
1932                         bpf_counter = 1;
1933                 } else
1934                         break;
1935
1936                 ++str;
1937         }
1938
1939         /*
1940          * precise ip:
1941          *
1942          *  0 - SAMPLE_IP can have arbitrary skid
1943          *  1 - SAMPLE_IP must have constant skid
1944          *  2 - SAMPLE_IP requested to have 0 skid
1945          *  3 - SAMPLE_IP must have 0 skid
1946          *
1947          *  See also PERF_RECORD_MISC_EXACT_IP
1948          */
1949         if (precise > 3)
1950                 return -EINVAL;
1951
1952         mod->eu = eu;
1953         mod->ek = ek;
1954         mod->eh = eh;
1955         mod->eH = eH;
1956         mod->eG = eG;
1957         mod->eI = eI;
1958         mod->precise = precise;
1959         mod->precise_max = precise_max;
1960         mod->exclude_GH = exclude_GH;
1961         mod->sample_read = sample_read;
1962         mod->pinned = pinned;
1963         mod->weak = weak;
1964         mod->bpf_counter = bpf_counter;
1965         mod->exclusive = exclusive;
1966
1967         return 0;
1968 }
1969
1970 /*
1971  * Basic modifier sanity check to validate it contains only one
1972  * instance of any modifier (apart from 'p') present.
1973  */
1974 static int check_modifier(char *str)
1975 {
1976         char *p = str;
1977
1978         /* The sizeof includes 0 byte as well. */
1979         if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1))
1980                 return -1;
1981
1982         while (*p) {
1983                 if (*p != 'p' && strchr(p + 1, *p))
1984                         return -1;
1985                 p++;
1986         }
1987
1988         return 0;
1989 }
1990
1991 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1992 {
1993         struct evsel *evsel;
1994         struct event_modifier mod;
1995
1996         if (str == NULL)
1997                 return 0;
1998
1999         if (check_modifier(str))
2000                 return -EINVAL;
2001
2002         if (!add && get_event_modifier(&mod, str, NULL))
2003                 return -EINVAL;
2004
2005         __evlist__for_each_entry(list, evsel) {
2006                 if (add && get_event_modifier(&mod, str, evsel))
2007                         return -EINVAL;
2008
2009                 evsel->core.attr.exclude_user   = mod.eu;
2010                 evsel->core.attr.exclude_kernel = mod.ek;
2011                 evsel->core.attr.exclude_hv     = mod.eh;
2012                 evsel->core.attr.precise_ip     = mod.precise;
2013                 evsel->core.attr.exclude_host   = mod.eH;
2014                 evsel->core.attr.exclude_guest  = mod.eG;
2015                 evsel->core.attr.exclude_idle   = mod.eI;
2016                 evsel->exclude_GH          = mod.exclude_GH;
2017                 evsel->sample_read         = mod.sample_read;
2018                 evsel->precise_max         = mod.precise_max;
2019                 evsel->weak_group          = mod.weak;
2020                 evsel->bpf_counter         = mod.bpf_counter;
2021
2022                 if (evsel__is_group_leader(evsel)) {
2023                         evsel->core.attr.pinned = mod.pinned;
2024                         evsel->core.attr.exclusive = mod.exclusive;
2025                 }
2026         }
2027
2028         return 0;
2029 }
2030
2031 int parse_events_name(struct list_head *list, const char *name)
2032 {
2033         struct evsel *evsel;
2034
2035         __evlist__for_each_entry(list, evsel) {
2036                 if (!evsel->name)
2037                         evsel->name = strdup(name);
2038         }
2039
2040         return 0;
2041 }
2042
2043 static int
2044 comp_pmu(const void *p1, const void *p2)
2045 {
2046         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
2047         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
2048
2049         return strcasecmp(pmu1->symbol, pmu2->symbol);
2050 }
2051
2052 static void perf_pmu__parse_cleanup(void)
2053 {
2054         if (perf_pmu_events_list_num > 0) {
2055                 struct perf_pmu_event_symbol *p;
2056                 int i;
2057
2058                 for (i = 0; i < perf_pmu_events_list_num; i++) {
2059                         p = perf_pmu_events_list + i;
2060                         zfree(&p->symbol);
2061                 }
2062                 zfree(&perf_pmu_events_list);
2063                 perf_pmu_events_list_num = 0;
2064         }
2065 }
2066
2067 #define SET_SYMBOL(str, stype)          \
2068 do {                                    \
2069         p->symbol = str;                \
2070         if (!p->symbol)                 \
2071                 goto err;               \
2072         p->type = stype;                \
2073 } while (0)
2074
2075 /*
2076  * Read the pmu events list from sysfs
2077  * Save it into perf_pmu_events_list
2078  */
2079 static void perf_pmu__parse_init(void)
2080 {
2081
2082         struct perf_pmu *pmu = NULL;
2083         struct perf_pmu_alias *alias;
2084         int len = 0;
2085
2086         pmu = NULL;
2087         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2088                 list_for_each_entry(alias, &pmu->aliases, list) {
2089                         if (strchr(alias->name, '-'))
2090                                 len++;
2091                         len++;
2092                 }
2093         }
2094
2095         if (len == 0) {
2096                 perf_pmu_events_list_num = -1;
2097                 return;
2098         }
2099         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2100         if (!perf_pmu_events_list)
2101                 return;
2102         perf_pmu_events_list_num = len;
2103
2104         len = 0;
2105         pmu = NULL;
2106         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2107                 list_for_each_entry(alias, &pmu->aliases, list) {
2108                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2109                         char *tmp = strchr(alias->name, '-');
2110
2111                         if (tmp != NULL) {
2112                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2113                                                 PMU_EVENT_SYMBOL_PREFIX);
2114                                 p++;
2115                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2116                                 len += 2;
2117                         } else {
2118                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2119                                 len++;
2120                         }
2121                 }
2122         }
2123         qsort(perf_pmu_events_list, len,
2124                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2125
2126         return;
2127 err:
2128         perf_pmu__parse_cleanup();
2129 }
2130
2131 /*
2132  * This function injects special term in
2133  * perf_pmu_events_list so the test code
2134  * can check on this functionality.
2135  */
2136 int perf_pmu__test_parse_init(void)
2137 {
2138         struct perf_pmu_event_symbol *list;
2139
2140         list = malloc(sizeof(*list) * 1);
2141         if (!list)
2142                 return -ENOMEM;
2143
2144         list->type   = PMU_EVENT_SYMBOL;
2145         list->symbol = strdup("read");
2146
2147         if (!list->symbol) {
2148                 free(list);
2149                 return -ENOMEM;
2150         }
2151
2152         perf_pmu_events_list = list;
2153         perf_pmu_events_list_num = 1;
2154         return 0;
2155 }
2156
2157 enum perf_pmu_event_symbol_type
2158 perf_pmu__parse_check(const char *name)
2159 {
2160         struct perf_pmu_event_symbol p, *r;
2161
2162         /* scan kernel pmu events from sysfs if needed */
2163         if (perf_pmu_events_list_num == 0)
2164                 perf_pmu__parse_init();
2165         /*
2166          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2167          * cpu-cycles has been handled by hardcode.
2168          * So it must be cpu// events, not kernel pmu event.
2169          */
2170         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2171                 return PMU_EVENT_SYMBOL_ERR;
2172
2173         p.symbol = strdup(name);
2174         r = bsearch(&p, perf_pmu_events_list,
2175                         (size_t) perf_pmu_events_list_num,
2176                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2177         zfree(&p.symbol);
2178         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2179 }
2180
2181 static int parse_events__scanner(const char *str,
2182                                  struct parse_events_state *parse_state)
2183 {
2184         YY_BUFFER_STATE buffer;
2185         void *scanner;
2186         int ret;
2187
2188         ret = parse_events_lex_init_extra(parse_state, &scanner);
2189         if (ret)
2190                 return ret;
2191
2192         buffer = parse_events__scan_string(str, scanner);
2193
2194 #ifdef PARSER_DEBUG
2195         parse_events_debug = 1;
2196         parse_events_set_debug(1, scanner);
2197 #endif
2198         ret = parse_events_parse(parse_state, scanner);
2199
2200         parse_events__flush_buffer(buffer, scanner);
2201         parse_events__delete_buffer(buffer, scanner);
2202         parse_events_lex_destroy(scanner);
2203         return ret;
2204 }
2205
2206 /*
2207  * parse event config string, return a list of event terms.
2208  */
2209 int parse_events_terms(struct list_head *terms, const char *str)
2210 {
2211         struct parse_events_state parse_state = {
2212                 .terms  = NULL,
2213                 .stoken = PE_START_TERMS,
2214         };
2215         int ret;
2216
2217         ret = parse_events__scanner(str, &parse_state);
2218         perf_pmu__parse_cleanup();
2219
2220         if (!ret) {
2221                 list_splice(parse_state.terms, terms);
2222                 zfree(&parse_state.terms);
2223                 return 0;
2224         }
2225
2226         parse_events_terms__delete(parse_state.terms);
2227         return ret;
2228 }
2229
2230 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
2231                                          const char *str, char *pmu_name,
2232                                          struct list_head *list)
2233 {
2234         struct parse_events_state ps = {
2235                 .list            = LIST_HEAD_INIT(ps.list),
2236                 .stoken          = PE_START_EVENTS,
2237                 .hybrid_pmu_name = pmu_name,
2238                 .idx             = parse_state->idx,
2239         };
2240         int ret;
2241
2242         ret = parse_events__scanner(str, &ps);
2243         perf_pmu__parse_cleanup();
2244
2245         if (!ret) {
2246                 if (!list_empty(&ps.list)) {
2247                         list_splice(&ps.list, list);
2248                         parse_state->idx = ps.idx;
2249                         return 0;
2250                 } else
2251                         return -1;
2252         }
2253
2254         return ret;
2255 }
2256
2257 int __parse_events(struct evlist *evlist, const char *str,
2258                    struct parse_events_error *err, struct perf_pmu *fake_pmu)
2259 {
2260         struct parse_events_state parse_state = {
2261                 .list     = LIST_HEAD_INIT(parse_state.list),
2262                 .idx      = evlist->core.nr_entries,
2263                 .error    = err,
2264                 .evlist   = evlist,
2265                 .stoken   = PE_START_EVENTS,
2266                 .fake_pmu = fake_pmu,
2267         };
2268         int ret;
2269
2270         ret = parse_events__scanner(str, &parse_state);
2271         perf_pmu__parse_cleanup();
2272
2273         if (!ret && list_empty(&parse_state.list)) {
2274                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2275                 return -1;
2276         }
2277
2278         /*
2279          * Add list to the evlist even with errors to allow callers to clean up.
2280          */
2281         evlist__splice_list_tail(evlist, &parse_state.list);
2282
2283         if (!ret) {
2284                 struct evsel *last;
2285
2286                 evlist->core.nr_groups += parse_state.nr_groups;
2287                 last = evlist__last(evlist);
2288                 last->cmdline_group_boundary = true;
2289
2290                 return 0;
2291         }
2292
2293         /*
2294          * There are 2 users - builtin-record and builtin-test objects.
2295          * Both call evlist__delete in case of error, so we dont
2296          * need to bother.
2297          */
2298         return ret;
2299 }
2300
2301 #define MAX_WIDTH 1000
2302 static int get_term_width(void)
2303 {
2304         struct winsize ws;
2305
2306         get_term_dimensions(&ws);
2307         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2308 }
2309
2310 static void __parse_events_print_error(int err_idx, const char *err_str,
2311                                 const char *err_help, const char *event)
2312 {
2313         const char *str = "invalid or unsupported event: ";
2314         char _buf[MAX_WIDTH];
2315         char *buf = (char *) event;
2316         int idx = 0;
2317         if (err_str) {
2318                 /* -2 for extra '' in the final fprintf */
2319                 int width       = get_term_width() - 2;
2320                 int len_event   = strlen(event);
2321                 int len_str, max_len, cut = 0;
2322
2323                 /*
2324                  * Maximum error index indent, we will cut
2325                  * the event string if it's bigger.
2326                  */
2327                 int max_err_idx = 13;
2328
2329                 /*
2330                  * Let's be specific with the message when
2331                  * we have the precise error.
2332                  */
2333                 str     = "event syntax error: ";
2334                 len_str = strlen(str);
2335                 max_len = width - len_str;
2336
2337                 buf = _buf;
2338
2339                 /* We're cutting from the beginning. */
2340                 if (err_idx > max_err_idx)
2341                         cut = err_idx - max_err_idx;
2342
2343                 strncpy(buf, event + cut, max_len);
2344
2345                 /* Mark cut parts with '..' on both sides. */
2346                 if (cut)
2347                         buf[0] = buf[1] = '.';
2348
2349                 if ((len_event - cut) > max_len) {
2350                         buf[max_len - 1] = buf[max_len - 2] = '.';
2351                         buf[max_len] = 0;
2352                 }
2353
2354                 idx = len_str + err_idx - cut;
2355         }
2356
2357         fprintf(stderr, "%s'%s'\n", str, buf);
2358         if (idx) {
2359                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2360                 if (err_help)
2361                         fprintf(stderr, "\n%s\n", err_help);
2362         }
2363 }
2364
2365 void parse_events_print_error(struct parse_events_error *err,
2366                               const char *event)
2367 {
2368         if (!err->num_errors)
2369                 return;
2370
2371         __parse_events_print_error(err->idx, err->str, err->help, event);
2372         zfree(&err->str);
2373         zfree(&err->help);
2374
2375         if (err->num_errors > 1) {
2376                 fputs("\nInitial error:\n", stderr);
2377                 __parse_events_print_error(err->first_idx, err->first_str,
2378                                         err->first_help, event);
2379                 zfree(&err->first_str);
2380                 zfree(&err->first_help);
2381         }
2382 }
2383
2384 #undef MAX_WIDTH
2385
2386 int parse_events_option(const struct option *opt, const char *str,
2387                         int unset __maybe_unused)
2388 {
2389         struct evlist *evlist = *(struct evlist **)opt->value;
2390         struct parse_events_error err;
2391         int ret;
2392
2393         bzero(&err, sizeof(err));
2394         ret = parse_events(evlist, str, &err);
2395
2396         if (ret) {
2397                 parse_events_print_error(&err, str);
2398                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2399         }
2400
2401         return ret;
2402 }
2403
2404 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2405 {
2406         struct evlist **evlistp = opt->value;
2407         int ret;
2408
2409         if (*evlistp == NULL) {
2410                 *evlistp = evlist__new();
2411
2412                 if (*evlistp == NULL) {
2413                         fprintf(stderr, "Not enough memory to create evlist\n");
2414                         return -1;
2415                 }
2416         }
2417
2418         ret = parse_events_option(opt, str, unset);
2419         if (ret) {
2420                 evlist__delete(*evlistp);
2421                 *evlistp = NULL;
2422         }
2423
2424         return ret;
2425 }
2426
2427 static int
2428 foreach_evsel_in_last_glob(struct evlist *evlist,
2429                            int (*func)(struct evsel *evsel,
2430                                        const void *arg),
2431                            const void *arg)
2432 {
2433         struct evsel *last = NULL;
2434         int err;
2435
2436         /*
2437          * Don't return when list_empty, give func a chance to report
2438          * error when it found last == NULL.
2439          *
2440          * So no need to WARN here, let *func do this.
2441          */
2442         if (evlist->core.nr_entries > 0)
2443                 last = evlist__last(evlist);
2444
2445         do {
2446                 err = (*func)(last, arg);
2447                 if (err)
2448                         return -1;
2449                 if (!last)
2450                         return 0;
2451
2452                 if (last->core.node.prev == &evlist->core.entries)
2453                         return 0;
2454                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2455         } while (!last->cmdline_group_boundary);
2456
2457         return 0;
2458 }
2459
2460 static int set_filter(struct evsel *evsel, const void *arg)
2461 {
2462         const char *str = arg;
2463         bool found = false;
2464         int nr_addr_filters = 0;
2465         struct perf_pmu *pmu = NULL;
2466
2467         if (evsel == NULL) {
2468                 fprintf(stderr,
2469                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2470                 return -1;
2471         }
2472
2473         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2474                 if (evsel__append_tp_filter(evsel, str) < 0) {
2475                         fprintf(stderr,
2476                                 "not enough memory to hold filter string\n");
2477                         return -1;
2478                 }
2479
2480                 return 0;
2481         }
2482
2483         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2484                 if (pmu->type == evsel->core.attr.type) {
2485                         found = true;
2486                         break;
2487                 }
2488
2489         if (found)
2490                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2491                                     "%d", &nr_addr_filters);
2492
2493         if (!nr_addr_filters) {
2494                 fprintf(stderr,
2495                         "This CPU does not support address filtering\n");
2496                 return -1;
2497         }
2498
2499         if (evsel__append_addr_filter(evsel, str) < 0) {
2500                 fprintf(stderr,
2501                         "not enough memory to hold filter string\n");
2502                 return -1;
2503         }
2504
2505         return 0;
2506 }
2507
2508 int parse_filter(const struct option *opt, const char *str,
2509                  int unset __maybe_unused)
2510 {
2511         struct evlist *evlist = *(struct evlist **)opt->value;
2512
2513         return foreach_evsel_in_last_glob(evlist, set_filter,
2514                                           (const void *)str);
2515 }
2516
2517 static int add_exclude_perf_filter(struct evsel *evsel,
2518                                    const void *arg __maybe_unused)
2519 {
2520         char new_filter[64];
2521
2522         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2523                 fprintf(stderr,
2524                         "--exclude-perf option should follow a -e tracepoint option\n");
2525                 return -1;
2526         }
2527
2528         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2529
2530         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2531                 fprintf(stderr,
2532                         "not enough memory to hold filter string\n");
2533                 return -1;
2534         }
2535
2536         return 0;
2537 }
2538
2539 int exclude_perf(const struct option *opt,
2540                  const char *arg __maybe_unused,
2541                  int unset __maybe_unused)
2542 {
2543         struct evlist *evlist = *(struct evlist **)opt->value;
2544
2545         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2546                                           NULL);
2547 }
2548
2549 static const char * const event_type_descriptors[] = {
2550         "Hardware event",
2551         "Software event",
2552         "Tracepoint event",
2553         "Hardware cache event",
2554         "Raw hardware event descriptor",
2555         "Hardware breakpoint",
2556 };
2557
2558 static int cmp_string(const void *a, const void *b)
2559 {
2560         const char * const *as = a;
2561         const char * const *bs = b;
2562
2563         return strcmp(*as, *bs);
2564 }
2565
2566 /*
2567  * Print the events from <debugfs_mount_point>/tracing/events
2568  */
2569
2570 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2571                              bool name_only)
2572 {
2573         DIR *sys_dir, *evt_dir;
2574         struct dirent *sys_dirent, *evt_dirent;
2575         char evt_path[MAXPATHLEN];
2576         char *dir_path;
2577         char **evt_list = NULL;
2578         unsigned int evt_i = 0, evt_num = 0;
2579         bool evt_num_known = false;
2580
2581 restart:
2582         sys_dir = tracing_events__opendir();
2583         if (!sys_dir)
2584                 return;
2585
2586         if (evt_num_known) {
2587                 evt_list = zalloc(sizeof(char *) * evt_num);
2588                 if (!evt_list)
2589                         goto out_close_sys_dir;
2590         }
2591
2592         for_each_subsystem(sys_dir, sys_dirent) {
2593                 if (subsys_glob != NULL &&
2594                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2595                         continue;
2596
2597                 dir_path = get_events_file(sys_dirent->d_name);
2598                 if (!dir_path)
2599                         continue;
2600                 evt_dir = opendir(dir_path);
2601                 if (!evt_dir)
2602                         goto next;
2603
2604                 for_each_event(dir_path, evt_dir, evt_dirent) {
2605                         if (event_glob != NULL &&
2606                             !strglobmatch(evt_dirent->d_name, event_glob))
2607                                 continue;
2608
2609                         if (!evt_num_known) {
2610                                 evt_num++;
2611                                 continue;
2612                         }
2613
2614                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2615                                  sys_dirent->d_name, evt_dirent->d_name);
2616
2617                         evt_list[evt_i] = strdup(evt_path);
2618                         if (evt_list[evt_i] == NULL) {
2619                                 put_events_file(dir_path);
2620                                 goto out_close_evt_dir;
2621                         }
2622                         evt_i++;
2623                 }
2624                 closedir(evt_dir);
2625 next:
2626                 put_events_file(dir_path);
2627         }
2628         closedir(sys_dir);
2629
2630         if (!evt_num_known) {
2631                 evt_num_known = true;
2632                 goto restart;
2633         }
2634         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2635         evt_i = 0;
2636         while (evt_i < evt_num) {
2637                 if (name_only) {
2638                         printf("%s ", evt_list[evt_i++]);
2639                         continue;
2640                 }
2641                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2642                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2643         }
2644         if (evt_num && pager_in_use())
2645                 printf("\n");
2646
2647 out_free:
2648         evt_num = evt_i;
2649         for (evt_i = 0; evt_i < evt_num; evt_i++)
2650                 zfree(&evt_list[evt_i]);
2651         zfree(&evt_list);
2652         return;
2653
2654 out_close_evt_dir:
2655         closedir(evt_dir);
2656 out_close_sys_dir:
2657         closedir(sys_dir);
2658
2659         printf("FATAL: not enough memory to print %s\n",
2660                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2661         if (evt_list)
2662                 goto out_free;
2663 }
2664
2665 /*
2666  * Check whether event is in <debugfs_mount_point>/tracing/events
2667  */
2668
2669 int is_valid_tracepoint(const char *event_string)
2670 {
2671         DIR *sys_dir, *evt_dir;
2672         struct dirent *sys_dirent, *evt_dirent;
2673         char evt_path[MAXPATHLEN];
2674         char *dir_path;
2675
2676         sys_dir = tracing_events__opendir();
2677         if (!sys_dir)
2678                 return 0;
2679
2680         for_each_subsystem(sys_dir, sys_dirent) {
2681                 dir_path = get_events_file(sys_dirent->d_name);
2682                 if (!dir_path)
2683                         continue;
2684                 evt_dir = opendir(dir_path);
2685                 if (!evt_dir)
2686                         goto next;
2687
2688                 for_each_event(dir_path, evt_dir, evt_dirent) {
2689                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2690                                  sys_dirent->d_name, evt_dirent->d_name);
2691                         if (!strcmp(evt_path, event_string)) {
2692                                 closedir(evt_dir);
2693                                 closedir(sys_dir);
2694                                 return 1;
2695                         }
2696                 }
2697                 closedir(evt_dir);
2698 next:
2699                 put_events_file(dir_path);
2700         }
2701         closedir(sys_dir);
2702         return 0;
2703 }
2704
2705 static bool is_event_supported(u8 type, u64 config)
2706 {
2707         bool ret = true;
2708         int open_return;
2709         struct evsel *evsel;
2710         struct perf_event_attr attr = {
2711                 .type = type,
2712                 .config = config,
2713                 .disabled = 1,
2714         };
2715         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2716
2717         if (tmap == NULL)
2718                 return false;
2719
2720         evsel = evsel__new(&attr);
2721         if (evsel) {
2722                 open_return = evsel__open(evsel, NULL, tmap);
2723                 ret = open_return >= 0;
2724
2725                 if (open_return == -EACCES) {
2726                         /*
2727                          * This happens if the paranoid value
2728                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2729                          * Re-run with exclude_kernel set; we don't do that
2730                          * by default as some ARM machines do not support it.
2731                          *
2732                          */
2733                         evsel->core.attr.exclude_kernel = 1;
2734                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2735                 }
2736                 evsel__delete(evsel);
2737         }
2738
2739         perf_thread_map__put(tmap);
2740         return ret;
2741 }
2742
2743 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2744                       bool name_only)
2745 {
2746         struct probe_cache *pcache;
2747         struct probe_cache_entry *ent;
2748         struct strlist *bidlist, *sdtlist;
2749         struct strlist_config cfg = {.dont_dupstr = true};
2750         struct str_node *nd, *nd2;
2751         char *buf, *path, *ptr = NULL;
2752         bool show_detail = false;
2753         int ret;
2754
2755         sdtlist = strlist__new(NULL, &cfg);
2756         if (!sdtlist) {
2757                 pr_debug("Failed to allocate new strlist for SDT\n");
2758                 return;
2759         }
2760         bidlist = build_id_cache__list_all(true);
2761         if (!bidlist) {
2762                 pr_debug("Failed to get buildids: %d\n", errno);
2763                 return;
2764         }
2765         strlist__for_each_entry(nd, bidlist) {
2766                 pcache = probe_cache__new(nd->s, NULL);
2767                 if (!pcache)
2768                         continue;
2769                 list_for_each_entry(ent, &pcache->entries, node) {
2770                         if (!ent->sdt)
2771                                 continue;
2772                         if (subsys_glob &&
2773                             !strglobmatch(ent->pev.group, subsys_glob))
2774                                 continue;
2775                         if (event_glob &&
2776                             !strglobmatch(ent->pev.event, event_glob))
2777                                 continue;
2778                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2779                                         ent->pev.event, nd->s);
2780                         if (ret > 0)
2781                                 strlist__add(sdtlist, buf);
2782                 }
2783                 probe_cache__delete(pcache);
2784         }
2785         strlist__delete(bidlist);
2786
2787         strlist__for_each_entry(nd, sdtlist) {
2788                 buf = strchr(nd->s, '@');
2789                 if (buf)
2790                         *(buf++) = '\0';
2791                 if (name_only) {
2792                         printf("%s ", nd->s);
2793                         continue;
2794                 }
2795                 nd2 = strlist__next(nd);
2796                 if (nd2) {
2797                         ptr = strchr(nd2->s, '@');
2798                         if (ptr)
2799                                 *ptr = '\0';
2800                         if (strcmp(nd->s, nd2->s) == 0)
2801                                 show_detail = true;
2802                 }
2803                 if (show_detail) {
2804                         path = build_id_cache__origname(buf);
2805                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2806                         if (ret > 0) {
2807                                 printf("  %-50s [%s]\n", buf, "SDT event");
2808                                 free(buf);
2809                         }
2810                         free(path);
2811                 } else
2812                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2813                 if (nd2) {
2814                         if (strcmp(nd->s, nd2->s) != 0)
2815                                 show_detail = false;
2816                         if (ptr)
2817                                 *ptr = '@';
2818                 }
2819         }
2820         strlist__delete(sdtlist);
2821 }
2822
2823 int print_hwcache_events(const char *event_glob, bool name_only)
2824 {
2825         unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0;
2826         char name[64], new_name[128];
2827         char **evt_list = NULL, **evt_pmus = NULL;
2828         bool evt_num_known = false;
2829         struct perf_pmu *pmu = NULL;
2830
2831         if (perf_pmu__has_hybrid()) {
2832                 npmus = perf_pmu__hybrid_pmu_num();
2833                 evt_pmus = zalloc(sizeof(char *) * npmus);
2834                 if (!evt_pmus)
2835                         goto out_enomem;
2836         }
2837
2838 restart:
2839         if (evt_num_known) {
2840                 evt_list = zalloc(sizeof(char *) * evt_num);
2841                 if (!evt_list)
2842                         goto out_enomem;
2843         }
2844
2845         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2846                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2847                         /* skip invalid cache type */
2848                         if (!evsel__is_cache_op_valid(type, op))
2849                                 continue;
2850
2851                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2852                                 unsigned int hybrid_supported = 0, j;
2853                                 bool supported;
2854
2855                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2856                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2857                                         continue;
2858
2859                                 if (!perf_pmu__has_hybrid()) {
2860                                         if (!is_event_supported(PERF_TYPE_HW_CACHE,
2861                                                                 type | (op << 8) | (i << 16))) {
2862                                                 continue;
2863                                         }
2864                                 } else {
2865                                         perf_pmu__for_each_hybrid_pmu(pmu) {
2866                                                 if (!evt_num_known) {
2867                                                         evt_num++;
2868                                                         continue;
2869                                                 }
2870
2871                                                 supported = is_event_supported(
2872                                                                         PERF_TYPE_HW_CACHE,
2873                                                                         type | (op << 8) | (i << 16) |
2874                                                                         ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
2875                                                 if (supported) {
2876                                                         snprintf(new_name, sizeof(new_name), "%s/%s/",
2877                                                                  pmu->name, name);
2878                                                         evt_pmus[hybrid_supported] = strdup(new_name);
2879                                                         hybrid_supported++;
2880                                                 }
2881                                         }
2882
2883                                         if (hybrid_supported == 0)
2884                                                 continue;
2885                                 }
2886
2887                                 if (!evt_num_known) {
2888                                         evt_num++;
2889                                         continue;
2890                                 }
2891
2892                                 if ((hybrid_supported == 0) ||
2893                                     (hybrid_supported == npmus)) {
2894                                         evt_list[evt_i] = strdup(name);
2895                                         if (npmus > 0) {
2896                                                 for (j = 0; j < npmus; j++)
2897                                                         zfree(&evt_pmus[j]);
2898                                         }
2899                                 } else {
2900                                         for (j = 0; j < hybrid_supported; j++) {
2901                                                 evt_list[evt_i++] = evt_pmus[j];
2902                                                 evt_pmus[j] = NULL;
2903                                         }
2904                                         continue;
2905                                 }
2906
2907                                 if (evt_list[evt_i] == NULL)
2908                                         goto out_enomem;
2909                                 evt_i++;
2910                         }
2911                 }
2912         }
2913
2914         if (!evt_num_known) {
2915                 evt_num_known = true;
2916                 goto restart;
2917         }
2918
2919         for (evt_i = 0; evt_i < evt_num; evt_i++) {
2920                 if (!evt_list[evt_i])
2921                         break;
2922         }
2923
2924         evt_num = evt_i;
2925         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2926         evt_i = 0;
2927         while (evt_i < evt_num) {
2928                 if (name_only) {
2929                         printf("%s ", evt_list[evt_i++]);
2930                         continue;
2931                 }
2932                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2933                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2934         }
2935         if (evt_num && pager_in_use())
2936                 printf("\n");
2937
2938 out_free:
2939         evt_num = evt_i;
2940         for (evt_i = 0; evt_i < evt_num; evt_i++)
2941                 zfree(&evt_list[evt_i]);
2942         zfree(&evt_list);
2943
2944         for (evt_i = 0; evt_i < npmus; evt_i++)
2945                 zfree(&evt_pmus[evt_i]);
2946         zfree(&evt_pmus);
2947         return evt_num;
2948
2949 out_enomem:
2950         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2951         if (evt_list)
2952                 goto out_free;
2953         return evt_num;
2954 }
2955
2956 static void print_tool_event(const char *name, const char *event_glob,
2957                              bool name_only)
2958 {
2959         if (event_glob && !strglobmatch(name, event_glob))
2960                 return;
2961         if (name_only)
2962                 printf("%s ", name);
2963         else
2964                 printf("  %-50s [%s]\n", name, "Tool event");
2965
2966 }
2967
2968 void print_tool_events(const char *event_glob, bool name_only)
2969 {
2970         print_tool_event("duration_time", event_glob, name_only);
2971         if (pager_in_use())
2972                 printf("\n");
2973 }
2974
2975 void print_symbol_events(const char *event_glob, unsigned type,
2976                                 struct event_symbol *syms, unsigned max,
2977                                 bool name_only)
2978 {
2979         unsigned int i, evt_i = 0, evt_num = 0;
2980         char name[MAX_NAME_LEN];
2981         char **evt_list = NULL;
2982         bool evt_num_known = false;
2983
2984 restart:
2985         if (evt_num_known) {
2986                 evt_list = zalloc(sizeof(char *) * evt_num);
2987                 if (!evt_list)
2988                         goto out_enomem;
2989                 syms -= max;
2990         }
2991
2992         for (i = 0; i < max; i++, syms++) {
2993                 /*
2994                  * New attr.config still not supported here, the latest
2995                  * example was PERF_COUNT_SW_CGROUP_SWITCHES
2996                  */
2997                 if (syms->symbol == NULL)
2998                         continue;
2999
3000                 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
3001                       (syms->alias && strglobmatch(syms->alias, event_glob))))
3002                         continue;
3003
3004                 if (!is_event_supported(type, i))
3005                         continue;
3006
3007                 if (!evt_num_known) {
3008                         evt_num++;
3009                         continue;
3010                 }
3011
3012                 if (!name_only && strlen(syms->alias))
3013                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
3014                 else
3015                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
3016
3017                 evt_list[evt_i] = strdup(name);
3018                 if (evt_list[evt_i] == NULL)
3019                         goto out_enomem;
3020                 evt_i++;
3021         }
3022
3023         if (!evt_num_known) {
3024                 evt_num_known = true;
3025                 goto restart;
3026         }
3027         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
3028         evt_i = 0;
3029         while (evt_i < evt_num) {
3030                 if (name_only) {
3031                         printf("%s ", evt_list[evt_i++]);
3032                         continue;
3033                 }
3034                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
3035         }
3036         if (evt_num && pager_in_use())
3037                 printf("\n");
3038
3039 out_free:
3040         evt_num = evt_i;
3041         for (evt_i = 0; evt_i < evt_num; evt_i++)
3042                 zfree(&evt_list[evt_i]);
3043         zfree(&evt_list);
3044         return;
3045
3046 out_enomem:
3047         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
3048         if (evt_list)
3049                 goto out_free;
3050 }
3051
3052 /*
3053  * Print the help text for the event symbols:
3054  */
3055 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
3056                         bool long_desc, bool details_flag, bool deprecated)
3057 {
3058         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
3059                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
3060
3061         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
3062                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
3063         print_tool_events(event_glob, name_only);
3064
3065         print_hwcache_events(event_glob, name_only);
3066
3067         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
3068                         details_flag, deprecated);
3069
3070         if (event_glob != NULL)
3071                 return;
3072
3073         if (!name_only) {
3074                 printf("  %-50s [%s]\n",
3075                        "rNNN",
3076                        event_type_descriptors[PERF_TYPE_RAW]);
3077                 printf("  %-50s [%s]\n",
3078                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
3079                        event_type_descriptors[PERF_TYPE_RAW]);
3080                 if (pager_in_use())
3081                         printf("   (see 'man perf-list' on how to encode it)\n\n");
3082
3083                 printf("  %-50s [%s]\n",
3084                        "mem:<addr>[/len][:access]",
3085                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
3086                 if (pager_in_use())
3087                         printf("\n");
3088         }
3089
3090         print_tracepoint_events(NULL, NULL, name_only);
3091
3092         print_sdt_events(NULL, NULL, name_only);
3093
3094         metricgroup__print(true, true, NULL, name_only, details_flag);
3095
3096         print_libpfm_events(name_only, long_desc);
3097 }
3098
3099 int parse_events__is_hardcoded_term(struct parse_events_term *term)
3100 {
3101         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
3102 }
3103
3104 static int new_term(struct parse_events_term **_term,
3105                     struct parse_events_term *temp,
3106                     char *str, u64 num)
3107 {
3108         struct parse_events_term *term;
3109
3110         term = malloc(sizeof(*term));
3111         if (!term)
3112                 return -ENOMEM;
3113
3114         *term = *temp;
3115         INIT_LIST_HEAD(&term->list);
3116         term->weak = false;
3117
3118         switch (term->type_val) {
3119         case PARSE_EVENTS__TERM_TYPE_NUM:
3120                 term->val.num = num;
3121                 break;
3122         case PARSE_EVENTS__TERM_TYPE_STR:
3123                 term->val.str = str;
3124                 break;
3125         default:
3126                 free(term);
3127                 return -EINVAL;
3128         }
3129
3130         *_term = term;
3131         return 0;
3132 }
3133
3134 int parse_events_term__num(struct parse_events_term **term,
3135                            int type_term, char *config, u64 num,
3136                            bool no_value,
3137                            void *loc_term_, void *loc_val_)
3138 {
3139         YYLTYPE *loc_term = loc_term_;
3140         YYLTYPE *loc_val = loc_val_;
3141
3142         struct parse_events_term temp = {
3143                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
3144                 .type_term = type_term,
3145                 .config    = config ? : strdup(config_term_names[type_term]),
3146                 .no_value  = no_value,
3147                 .err_term  = loc_term ? loc_term->first_column : 0,
3148                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3149         };
3150
3151         return new_term(term, &temp, NULL, num);
3152 }
3153
3154 int parse_events_term__str(struct parse_events_term **term,
3155                            int type_term, char *config, char *str,
3156                            void *loc_term_, void *loc_val_)
3157 {
3158         YYLTYPE *loc_term = loc_term_;
3159         YYLTYPE *loc_val = loc_val_;
3160
3161         struct parse_events_term temp = {
3162                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3163                 .type_term = type_term,
3164                 .config    = config,
3165                 .err_term  = loc_term ? loc_term->first_column : 0,
3166                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3167         };
3168
3169         return new_term(term, &temp, str, 0);
3170 }
3171
3172 int parse_events_term__sym_hw(struct parse_events_term **term,
3173                               char *config, unsigned idx)
3174 {
3175         struct event_symbol *sym;
3176         char *str;
3177         struct parse_events_term temp = {
3178                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3179                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3180                 .config    = config,
3181         };
3182
3183         if (!temp.config) {
3184                 temp.config = strdup("event");
3185                 if (!temp.config)
3186                         return -ENOMEM;
3187         }
3188         BUG_ON(idx >= PERF_COUNT_HW_MAX);
3189         sym = &event_symbols_hw[idx];
3190
3191         str = strdup(sym->symbol);
3192         if (!str)
3193                 return -ENOMEM;
3194         return new_term(term, &temp, str, 0);
3195 }
3196
3197 int parse_events_term__clone(struct parse_events_term **new,
3198                              struct parse_events_term *term)
3199 {
3200         char *str;
3201         struct parse_events_term temp = {
3202                 .type_val  = term->type_val,
3203                 .type_term = term->type_term,
3204                 .config    = NULL,
3205                 .err_term  = term->err_term,
3206                 .err_val   = term->err_val,
3207         };
3208
3209         if (term->config) {
3210                 temp.config = strdup(term->config);
3211                 if (!temp.config)
3212                         return -ENOMEM;
3213         }
3214         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3215                 return new_term(new, &temp, NULL, term->val.num);
3216
3217         str = strdup(term->val.str);
3218         if (!str)
3219                 return -ENOMEM;
3220         return new_term(new, &temp, str, 0);
3221 }
3222
3223 void parse_events_term__delete(struct parse_events_term *term)
3224 {
3225         if (term->array.nr_ranges)
3226                 zfree(&term->array.ranges);
3227
3228         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3229                 zfree(&term->val.str);
3230
3231         zfree(&term->config);
3232         free(term);
3233 }
3234
3235 int parse_events_copy_term_list(struct list_head *old,
3236                                  struct list_head **new)
3237 {
3238         struct parse_events_term *term, *n;
3239         int ret;
3240
3241         if (!old) {
3242                 *new = NULL;
3243                 return 0;
3244         }
3245
3246         *new = malloc(sizeof(struct list_head));
3247         if (!*new)
3248                 return -ENOMEM;
3249         INIT_LIST_HEAD(*new);
3250
3251         list_for_each_entry (term, old, list) {
3252                 ret = parse_events_term__clone(&n, term);
3253                 if (ret)
3254                         return ret;
3255                 list_add_tail(&n->list, *new);
3256         }
3257         return 0;
3258 }
3259
3260 void parse_events_terms__purge(struct list_head *terms)
3261 {
3262         struct parse_events_term *term, *h;
3263
3264         list_for_each_entry_safe(term, h, terms, list) {
3265                 list_del_init(&term->list);
3266                 parse_events_term__delete(term);
3267         }
3268 }
3269
3270 void parse_events_terms__delete(struct list_head *terms)
3271 {
3272         if (!terms)
3273                 return;
3274         parse_events_terms__purge(terms);
3275         free(terms);
3276 }
3277
3278 void parse_events__clear_array(struct parse_events_array *a)
3279 {
3280         zfree(&a->ranges);
3281 }
3282
3283 void parse_events_evlist_error(struct parse_events_state *parse_state,
3284                                int idx, const char *str)
3285 {
3286         if (!parse_state->error)
3287                 return;
3288
3289         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3290 }
3291
3292 static void config_terms_list(char *buf, size_t buf_sz)
3293 {
3294         int i;
3295         bool first = true;
3296
3297         buf[0] = '\0';
3298         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3299                 const char *name = config_term_names[i];
3300
3301                 if (!config_term_avail(i, NULL))
3302                         continue;
3303                 if (!name)
3304                         continue;
3305                 if (name[0] == '<')
3306                         continue;
3307
3308                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3309                         return;
3310
3311                 if (!first)
3312                         strcat(buf, ",");
3313                 else
3314                         first = false;
3315                 strcat(buf, name);
3316         }
3317 }
3318
3319 /*
3320  * Return string contains valid config terms of an event.
3321  * @additional_terms: For terms such as PMU sysfs terms.
3322  */
3323 char *parse_events_formats_error_string(char *additional_terms)
3324 {
3325         char *str;
3326         /* "no-overwrite" is the longest name */
3327         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3328                           (sizeof("no-overwrite") - 1)];
3329
3330         config_terms_list(static_terms, sizeof(static_terms));
3331         /* valid terms */
3332         if (additional_terms) {
3333                 if (asprintf(&str, "valid terms: %s,%s",
3334                              additional_terms, static_terms) < 0)
3335                         goto fail;
3336         } else {
3337                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3338                         goto fail;
3339         }
3340         return str;
3341
3342 fail:
3343         return NULL;
3344 }
3345
3346 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx,
3347                                              struct perf_event_attr *attr,
3348                                              const char *name, struct perf_pmu *pmu,
3349                                              struct list_head *config_terms)
3350 {
3351         return __add_event(list, idx, attr, true, name, pmu,
3352                            config_terms, false, NULL);
3353 }