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 struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
 158         [PERF_TOOL_DURATION_TIME] = {
 159                 .symbol = "duration_time",
 160                 .alias  = "",
 161         },
 162         [PERF_TOOL_USER_TIME] = {
 163                 .symbol = "user_time",
 164                 .alias  = "",
 165         },
 166         [PERF_TOOL_SYSTEM_TIME] = {
 167                 .symbol = "system_time",
 168                 .alias  = "",
 169         },
 170 };
 171
 172 #define __PERF_EVENT_FIELD(config, name) \
 173         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 174
 175 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 176 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 177 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 178 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 179
 180 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 181         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 182                 if (sys_dirent->d_type == DT_DIR &&             \
 183                     (strcmp(sys_dirent->d_name, ".")) &&        \
 184                     (strcmp(sys_dirent->d_name, "..")))
 185
 186 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 187 {
 188         char evt_path[MAXPATHLEN];
 189         int fd;
 190
 191         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 192         fd = open(evt_path, O_RDONLY);
 193         if (fd < 0)
 194                 return -EINVAL;
 195         close(fd);
 196
 197         return 0;
 198 }
 199
 200 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 201         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 202                 if (evt_dirent->d_type == DT_DIR &&             \
 203                     (strcmp(evt_dirent->d_name, ".")) &&        \
 204                     (strcmp(evt_dirent->d_name, "..")) &&       \
 205                     (!tp_event_has_id(dir_path, evt_dirent)))
 206
 207 #define MAX_EVENT_LENGTH 512
 208
 209 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 210 {
 211         struct tracepoint_path *path = NULL;
 212         DIR *sys_dir, *evt_dir;
 213         struct dirent *sys_dirent, *evt_dirent;
 214         char id_buf[24];
 215         int fd;
 216         u64 id;
 217         char evt_path[MAXPATHLEN];
 218         char *dir_path;
 219
 220         sys_dir = tracing_events__opendir();
 221         if (!sys_dir)
 222                 return NULL;
 223
 224         for_each_subsystem(sys_dir, sys_dirent) {
 225                 dir_path = get_events_file(sys_dirent->d_name);
 226                 if (!dir_path)
 227                         continue;
 228                 evt_dir = opendir(dir_path);
 229                 if (!evt_dir)
 230                         goto next;
 231
 232                 for_each_event(dir_path, evt_dir, evt_dirent) {
 233
 234                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 235                                   evt_dirent->d_name);
 236                         fd = open(evt_path, O_RDONLY);
 237                         if (fd < 0)
 238                                 continue;
 239                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 240                                 close(fd);
 241                                 continue;
 242                         }
 243                         close(fd);
 244                         id = atoll(id_buf);
 245                         if (id == config) {
 246                                 put_events_file(dir_path);
 247                                 closedir(evt_dir);
 248                                 closedir(sys_dir);
 249                                 path = zalloc(sizeof(*path));
 250                                 if (!path)
 251                                         return NULL;
 252                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 253                                         free(path);
 254                                         return NULL;
 255                                 }
 256                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 257                                         zfree(&path->system);
 258                                         free(path);
 259                                         return NULL;
 260                                 }
 261                                 return path;
 262                         }
 263                 }
 264                 closedir(evt_dir);
 265 next:
 266                 put_events_file(dir_path);
 267         }
 268
 269         closedir(sys_dir);
 270         return NULL;
 271 }
 272
 273 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 274 {
 275         struct tracepoint_path *path = zalloc(sizeof(*path));
 276         char *str = strchr(name, ':');
 277
 278         if (path == NULL || str == NULL) {
 279                 free(path);
 280                 return NULL;
 281         }
 282
 283         path->system = strndup(name, str - name);
 284         path->name = strdup(str+1);
 285
 286         if (path->system == NULL || path->name == NULL) {
 287                 zfree(&path->system);
 288                 zfree(&path->name);
 289                 zfree(&path);
 290         }
 291
 292         return path;
 293 }
 294
 295 const char *event_type(int type)
 296 {
 297         switch (type) {
 298         case PERF_TYPE_HARDWARE:
 299                 return "hardware";
 300
 301         case PERF_TYPE_SOFTWARE:
 302                 return "software";
 303
 304         case PERF_TYPE_TRACEPOINT:
 305                 return "tracepoint";
 306
 307         case PERF_TYPE_HW_CACHE:
 308                 return "hardware-cache";
 309
 310         default:
 311                 break;
 312         }
 313
 314         return "unknown";
 315 }
 316
 317 static char *get_config_str(struct list_head *head_terms, int type_term)
 318 {
 319         struct parse_events_term *term;
 320
 321         if (!head_terms)
 322                 return NULL;
 323
 324         list_for_each_entry(term, head_terms, list)
 325                 if (term->type_term == type_term)
 326                         return term->val.str;
 327
 328         return NULL;
 329 }
 330
 331 static char *get_config_metric_id(struct list_head *head_terms)
 332 {
 333         return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_METRIC_ID);
 334 }
 335
 336 static char *get_config_name(struct list_head *head_terms)
 337 {
 338         return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_NAME);
 339 }
 340
 341 static struct evsel *
 342 __add_event(struct list_head *list, int *idx,
 343             struct perf_event_attr *attr,
 344             bool init_attr,
 345             const char *name, const char *metric_id, struct perf_pmu *pmu,
 346             struct list_head *config_terms, bool auto_merge_stats,
 347             const char *cpu_list)
 348 {
 349         struct evsel *evsel;
 350         struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
 351                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 352
 353         if (pmu && attr->type == PERF_TYPE_RAW)
 354                 perf_pmu__warn_invalid_config(pmu, attr->config, name);
 355
 356         if (init_attr)
 357                 event_attr_init(attr);
 358
 359         evsel = evsel__new_idx(attr, *idx);
 360         if (!evsel) {
 361                 perf_cpu_map__put(cpus);
 362                 return NULL;
 363         }
 364
 365         (*idx)++;
 366         evsel->core.cpus = cpus;
 367         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 368         evsel->core.requires_cpu = pmu ? pmu->is_uncore : false;
 369         evsel->auto_merge_stats = auto_merge_stats;
 370
 371         if (name)
 372                 evsel->name = strdup(name);
 373
 374         if (metric_id)
 375                 evsel->metric_id = strdup(metric_id);
 376
 377         if (config_terms)
 378                 list_splice_init(config_terms, &evsel->config_terms);
 379
 380         if (list)
 381                 list_add_tail(&evsel->core.node, list);
 382
 383         return evsel;
 384 }
 385
 386 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
 387                                       const char *name, const char *metric_id,
 388                                       struct perf_pmu *pmu)
 389 {
 390         return __add_event(/*list=*/NULL, &idx, attr, /*init_attr=*/false, name,
 391                            metric_id, pmu, /*config_terms=*/NULL,
 392                            /*auto_merge_stats=*/false, /*cpu_list=*/NULL);
 393 }
 394
 395 static int add_event(struct list_head *list, int *idx,
 396                      struct perf_event_attr *attr, const char *name,
 397                      const char *metric_id, struct list_head *config_terms)
 398 {
 399         return __add_event(list, idx, attr, /*init_attr*/true, name, metric_id,
 400                            /*pmu=*/NULL, config_terms,
 401                            /*auto_merge_stats=*/false, /*cpu_list=*/NULL) ? 0 : -ENOMEM;
 402 }
 403
 404 static int add_event_tool(struct list_head *list, int *idx,
 405                           enum perf_tool_event tool_event)
 406 {
 407         struct evsel *evsel;
 408         struct perf_event_attr attr = {
 409                 .type = PERF_TYPE_SOFTWARE,
 410                 .config = PERF_COUNT_SW_DUMMY,
 411         };
 412
 413         evsel = __add_event(list, idx, &attr, /*init_attr=*/true, /*name=*/NULL,
 414                             /*metric_id=*/NULL, /*pmu=*/NULL,
 415                             /*config_terms=*/NULL, /*auto_merge_stats=*/false,
 416                             /*cpu_list=*/"0");
 417         if (!evsel)
 418                 return -ENOMEM;
 419         evsel->tool_event = tool_event;
 420         if (tool_event == PERF_TOOL_DURATION_TIME
 421             || tool_event == PERF_TOOL_USER_TIME
 422             || tool_event == PERF_TOOL_SYSTEM_TIME) {
 423                 free((char *)evsel->unit);
 424                 evsel->unit = strdup("ns");
 425         }
 426         return 0;
 427 }
 428
 429 static int parse_aliases(char *str, const char *const names[][EVSEL__MAX_ALIASES], int size)
 430 {
 431         int i, j;
 432         int n, longest = -1;
 433
 434         for (i = 0; i < size; i++) {
 435                 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
 436                         n = strlen(names[i][j]);
 437                         if (n > longest && !strncasecmp(str, names[i][j], n))
 438                                 longest = n;
 439                 }
 440                 if (longest > 0)
 441                         return i;
 442         }
 443
 444         return -1;
 445 }
 446
 447 typedef int config_term_func_t(struct perf_event_attr *attr,
 448                                struct parse_events_term *term,
 449                                struct parse_events_error *err);
 450 static int config_term_common(struct perf_event_attr *attr,
 451                               struct parse_events_term *term,
 452                               struct parse_events_error *err);
 453 static int config_attr(struct perf_event_attr *attr,
 454                        struct list_head *head,
 455                        struct parse_events_error *err,
 456                        config_term_func_t config_term);
 457
 458 int parse_events_add_cache(struct list_head *list, int *idx,
 459                            char *type, char *op_result1, char *op_result2,
 460                            struct parse_events_error *err,
 461                            struct list_head *head_config,
 462                            struct parse_events_state *parse_state)
 463 {
 464         struct perf_event_attr attr;
 465         LIST_HEAD(config_terms);
 466         char name[MAX_NAME_LEN];
 467         const char *config_name, *metric_id;
 468         int cache_type = -1, cache_op = -1, cache_result = -1;
 469         char *op_result[2] = { op_result1, op_result2 };
 470         int i, n, ret;
 471         bool hybrid;
 472
 473         /*
 474          * No fallback - if we cannot get a clear cache type
 475          * then bail out:
 476          */
 477         cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 478         if (cache_type == -1)
 479                 return -EINVAL;
 480
 481         config_name = get_config_name(head_config);
 482         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 483
 484         for (i = 0; (i < 2) && (op_result[i]); i++) {
 485                 char *str = op_result[i];
 486
 487                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 488
 489                 if (cache_op == -1) {
 490                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 491                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 492                         if (cache_op >= 0) {
 493                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 494                                         return -EINVAL;
 495                                 continue;
 496                         }
 497                 }
 498
 499                 if (cache_result == -1) {
 500                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 501                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 502                         if (cache_result >= 0)
 503                                 continue;
 504                 }
 505         }
 506
 507         /*
 508          * Fall back to reads:
 509          */
 510         if (cache_op == -1)
 511                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 512
 513         /*
 514          * Fall back to accesses:
 515          */
 516         if (cache_result == -1)
 517                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 518
 519         memset(&attr, 0, sizeof(attr));
 520         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 521         attr.type = PERF_TYPE_HW_CACHE;
 522
 523         if (head_config) {
 524                 if (config_attr(&attr, head_config, err,
 525                                 config_term_common))
 526                         return -EINVAL;
 527
 528                 if (get_config_terms(head_config, &config_terms))
 529                         return -ENOMEM;
 530         }
 531
 532         metric_id = get_config_metric_id(head_config);
 533         ret = parse_events__add_cache_hybrid(list, idx, &attr,
 534                                              config_name ? : name,
 535                                              metric_id,
 536                                              &config_terms,
 537                                              &hybrid, parse_state);
 538         if (hybrid)
 539                 goto out_free_terms;
 540
 541         ret = add_event(list, idx, &attr, config_name ? : name, metric_id,
 542                         &config_terms);
 543 out_free_terms:
 544         free_config_terms(&config_terms);
 545         return ret;
 546 }
 547
 548 static void tracepoint_error(struct parse_events_error *e, int err,
 549                              const char *sys, const char *name)
 550 {
 551         const char *str;
 552         char help[BUFSIZ];
 553
 554         if (!e)
 555                 return;
 556
 557         /*
 558          * We get error directly from syscall errno ( > 0),
 559          * or from encoded pointer's error ( < 0).
 560          */
 561         err = abs(err);
 562
 563         switch (err) {
 564         case EACCES:
 565                 str = "can't access trace events";
 566                 break;
 567         case ENOENT:
 568                 str = "unknown tracepoint";
 569                 break;
 570         default:
 571                 str = "failed to add tracepoint";
 572                 break;
 573         }
 574
 575         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 576         parse_events_error__handle(e, 0, strdup(str), strdup(help));
 577 }
 578
 579 static int add_tracepoint(struct list_head *list, int *idx,
 580                           const char *sys_name, const char *evt_name,
 581                           struct parse_events_error *err,
 582                           struct list_head *head_config)
 583 {
 584         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 585
 586         if (IS_ERR(evsel)) {
 587                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 588                 return PTR_ERR(evsel);
 589         }
 590
 591         if (head_config) {
 592                 LIST_HEAD(config_terms);
 593
 594                 if (get_config_terms(head_config, &config_terms))
 595                         return -ENOMEM;
 596                 list_splice(&config_terms, &evsel->config_terms);
 597         }
 598
 599         list_add_tail(&evsel->core.node, list);
 600         return 0;
 601 }
 602
 603 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 604                                       const char *sys_name, const char *evt_name,
 605                                       struct parse_events_error *err,
 606                                       struct list_head *head_config)
 607 {
 608         char *evt_path;
 609         struct dirent *evt_ent;
 610         DIR *evt_dir;
 611         int ret = 0, found = 0;
 612
 613         evt_path = get_events_file(sys_name);
 614         if (!evt_path) {
 615                 tracepoint_error(err, errno, sys_name, evt_name);
 616                 return -1;
 617         }
 618         evt_dir = opendir(evt_path);
 619         if (!evt_dir) {
 620                 put_events_file(evt_path);
 621                 tracepoint_error(err, errno, sys_name, evt_name);
 622                 return -1;
 623         }
 624
 625         while (!ret && (evt_ent = readdir(evt_dir))) {
 626                 if (!strcmp(evt_ent->d_name, ".")
 627                     || !strcmp(evt_ent->d_name, "..")
 628                     || !strcmp(evt_ent->d_name, "enable")
 629                     || !strcmp(evt_ent->d_name, "filter"))
 630                         continue;
 631
 632                 if (!strglobmatch(evt_ent->d_name, evt_name))
 633                         continue;
 634
 635                 found++;
 636
 637                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 638                                      err, head_config);
 639         }
 640
 641         if (!found) {
 642                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 643                 ret = -1;
 644         }
 645
 646         put_events_file(evt_path);
 647         closedir(evt_dir);
 648         return ret;
 649 }
 650
 651 static int add_tracepoint_event(struct list_head *list, int *idx,
 652                                 const char *sys_name, const char *evt_name,
 653                                 struct parse_events_error *err,
 654                                 struct list_head *head_config)
 655 {
 656         return strpbrk(evt_name, "*?") ?
 657                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 658                                           err, head_config) :
 659                add_tracepoint(list, idx, sys_name, evt_name,
 660                               err, head_config);
 661 }
 662
 663 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 664                                     const char *sys_name, const char *evt_name,
 665                                     struct parse_events_error *err,
 666                                     struct list_head *head_config)
 667 {
 668         struct dirent *events_ent;
 669         DIR *events_dir;
 670         int ret = 0;
 671
 672         events_dir = tracing_events__opendir();
 673         if (!events_dir) {
 674                 tracepoint_error(err, errno, sys_name, evt_name);
 675                 return -1;
 676         }
 677
 678         while (!ret && (events_ent = readdir(events_dir))) {
 679                 if (!strcmp(events_ent->d_name, ".")
 680                     || !strcmp(events_ent->d_name, "..")
 681                     || !strcmp(events_ent->d_name, "enable")
 682                     || !strcmp(events_ent->d_name, "header_event")
 683                     || !strcmp(events_ent->d_name, "header_page"))
 684                         continue;
 685
 686                 if (!strglobmatch(events_ent->d_name, sys_name))
 687                         continue;
 688
 689                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 690                                            evt_name, err, head_config);
 691         }
 692
 693         closedir(events_dir);
 694         return ret;
 695 }
 696
 697 #ifdef HAVE_LIBBPF_SUPPORT
 698 struct __add_bpf_event_param {
 699         struct parse_events_state *parse_state;
 700         struct list_head *list;
 701         struct list_head *head_config;
 702 };
 703
 704 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 705                          void *_param)
 706 {
 707         LIST_HEAD(new_evsels);
 708         struct __add_bpf_event_param *param = _param;
 709         struct parse_events_state *parse_state = param->parse_state;
 710         struct list_head *list = param->list;
 711         struct evsel *pos;
 712         int err;
 713         /*
 714          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 715          * then don't add the tracepoint, this will be used for something else, like
 716          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 717          *
 718          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 719          */
 720         if (group[0] == '!')
 721                 return 0;
 722
 723         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 724                  group, event, fd);
 725
 726         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 727                                           event, parse_state->error,
 728                                           param->head_config);
 729         if (err) {
 730                 struct evsel *evsel, *tmp;
 731
 732                 pr_debug("Failed to add BPF event %s:%s\n",
 733                          group, event);
 734                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 735                         list_del_init(&evsel->core.node);
 736                         evsel__delete(evsel);
 737                 }
 738                 return err;
 739         }
 740         pr_debug("adding %s:%s\n", group, event);
 741
 742         list_for_each_entry(pos, &new_evsels, core.node) {
 743                 pr_debug("adding %s:%s to %p\n",
 744                          group, event, pos);
 745                 pos->bpf_fd = fd;
 746                 pos->bpf_obj = obj;
 747         }
 748         list_splice(&new_evsels, list);
 749         return 0;
 750 }
 751
 752 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 753                               struct list_head *list,
 754                               struct bpf_object *obj,
 755                               struct list_head *head_config)
 756 {
 757         int err;
 758         char errbuf[BUFSIZ];
 759         struct __add_bpf_event_param param = {parse_state, list, head_config};
 760         static bool registered_unprobe_atexit = false;
 761
 762         if (IS_ERR(obj) || !obj) {
 763                 snprintf(errbuf, sizeof(errbuf),
 764                          "Internal error: load bpf obj with NULL");
 765                 err = -EINVAL;
 766                 goto errout;
 767         }
 768
 769         /*
 770          * Register atexit handler before calling bpf__probe() so
 771          * bpf__probe() don't need to unprobe probe points its already
 772          * created when failure.
 773          */
 774         if (!registered_unprobe_atexit) {
 775                 atexit(bpf__clear);
 776                 registered_unprobe_atexit = true;
 777         }
 778
 779         err = bpf__probe(obj);
 780         if (err) {
 781                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 782                 goto errout;
 783         }
 784
 785         err = bpf__load(obj);
 786         if (err) {
 787                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 788                 goto errout;
 789         }
 790
 791         err = bpf__foreach_event(obj, add_bpf_event, &param);
 792         if (err) {
 793                 snprintf(errbuf, sizeof(errbuf),
 794                          "Attach events in BPF object failed");
 795                 goto errout;
 796         }
 797
 798         return 0;
 799 errout:
 800         parse_events_error__handle(parse_state->error, 0,
 801                                 strdup(errbuf), strdup("(add -v to see detail)"));
 802         return err;
 803 }
 804
 805 static int
 806 parse_events_config_bpf(struct parse_events_state *parse_state,
 807                         struct bpf_object *obj,
 808                         struct list_head *head_config)
 809 {
 810         struct parse_events_term *term;
 811         int error_pos;
 812
 813         if (!head_config || list_empty(head_config))
 814                 return 0;
 815
 816         list_for_each_entry(term, head_config, list) {
 817                 int err;
 818
 819                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 820                         parse_events_error__handle(parse_state->error, term->err_term,
 821                                                 strdup("Invalid config term for BPF object"),
 822                                                 NULL);
 823                         return -EINVAL;
 824                 }
 825
 826                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 827                 if (err) {
 828                         char errbuf[BUFSIZ];
 829                         int idx;
 830
 831                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 832                                                  &error_pos, err, errbuf,
 833                                                  sizeof(errbuf));
 834
 835                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 836                                 idx = term->err_val;
 837                         else
 838                                 idx = term->err_term + error_pos;
 839
 840                         parse_events_error__handle(parse_state->error, idx,
 841                                                 strdup(errbuf),
 842                                                 strdup(
 843 "Hint:\tValid config terms:\n"
 844 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 845 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 846 "\n"
 847 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 848 "     \t(add -v to see detail)"));
 849                         return err;
 850                 }
 851         }
 852         return 0;
 853 }
 854
 855 /*
 856  * Split config terms:
 857  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 858  *  'call-graph=fp' is 'evt config', should be applied to each
 859  *  events in bpf.c.
 860  * 'map:array.value[0]=1' is 'obj config', should be processed
 861  * with parse_events_config_bpf.
 862  *
 863  * Move object config terms from the first list to obj_head_config.
 864  */
 865 static void
 866 split_bpf_config_terms(struct list_head *evt_head_config,
 867                        struct list_head *obj_head_config)
 868 {
 869         struct parse_events_term *term, *temp;
 870
 871         /*
 872          * Currently, all possible user config term
 873          * belong to bpf object. parse_events__is_hardcoded_term()
 874          * happens to be a good flag.
 875          *
 876          * See parse_events_config_bpf() and
 877          * config_term_tracepoint().
 878          */
 879         list_for_each_entry_safe(term, temp, evt_head_config, list)
 880                 if (!parse_events__is_hardcoded_term(term))
 881                         list_move_tail(&term->list, obj_head_config);
 882 }
 883
 884 int parse_events_load_bpf(struct parse_events_state *parse_state,
 885                           struct list_head *list,
 886                           char *bpf_file_name,
 887                           bool source,
 888                           struct list_head *head_config)
 889 {
 890         int err;
 891         struct bpf_object *obj;
 892         LIST_HEAD(obj_head_config);
 893
 894         if (head_config)
 895                 split_bpf_config_terms(head_config, &obj_head_config);
 896
 897         obj = bpf__prepare_load(bpf_file_name, source);
 898         if (IS_ERR(obj)) {
 899                 char errbuf[BUFSIZ];
 900
 901                 err = PTR_ERR(obj);
 902
 903                 if (err == -ENOTSUP)
 904                         snprintf(errbuf, sizeof(errbuf),
 905                                  "BPF support is not compiled");
 906                 else
 907                         bpf__strerror_prepare_load(bpf_file_name,
 908                                                    source,
 909                                                    -err, errbuf,
 910                                                    sizeof(errbuf));
 911
 912                 parse_events_error__handle(parse_state->error, 0,
 913                                         strdup(errbuf), strdup("(add -v to see detail)"));
 914                 return err;
 915         }
 916
 917         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 918         if (err)
 919                 return err;
 920         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 921
 922         /*
 923          * Caller doesn't know anything about obj_head_config,
 924          * so combine them together again before returning.
 925          */
 926         if (head_config)
 927                 list_splice_tail(&obj_head_config, head_config);
 928         return err;
 929 }
 930 #else // HAVE_LIBBPF_SUPPORT
 931 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 932                               struct list_head *list __maybe_unused,
 933                               struct bpf_object *obj __maybe_unused,
 934                               struct list_head *head_config __maybe_unused)
 935 {
 936         parse_events_error__handle(parse_state->error, 0,
 937                                    strdup("BPF support is not compiled"),
 938                                    strdup("Make sure libbpf-devel is available at build time."));
 939         return -ENOTSUP;
 940 }
 941
 942 int parse_events_load_bpf(struct parse_events_state *parse_state,
 943                           struct list_head *list __maybe_unused,
 944                           char *bpf_file_name __maybe_unused,
 945                           bool source __maybe_unused,
 946                           struct list_head *head_config __maybe_unused)
 947 {
 948         parse_events_error__handle(parse_state->error, 0,
 949                                    strdup("BPF support is not compiled"),
 950                                    strdup("Make sure libbpf-devel is available at build time."));
 951         return -ENOTSUP;
 952 }
 953 #endif // HAVE_LIBBPF_SUPPORT
 954
 955 static int
 956 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 957 {
 958         int i;
 959
 960         for (i = 0; i < 3; i++) {
 961                 if (!type || !type[i])
 962                         break;
 963
 964 #define CHECK_SET_TYPE(bit)             \
 965 do {                                    \
 966         if (attr->bp_type & bit)        \
 967                 return -EINVAL;         \
 968         else                            \
 969                 attr->bp_type |= bit;   \
 970 } while (0)
 971
 972                 switch (type[i]) {
 973                 case 'r':
 974                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 975                         break;
 976                 case 'w':
 977                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 978                         break;
 979                 case 'x':
 980                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 981                         break;
 982                 default:
 983                         return -EINVAL;
 984                 }
 985         }
 986
 987 #undef CHECK_SET_TYPE
 988
 989         if (!attr->bp_type) /* Default */
 990                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 991
 992         return 0;
 993 }
 994
 995 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 996                                 u64 addr, char *type, u64 len)
 997 {
 998         struct perf_event_attr attr;
 999
1000         memset(&attr, 0, sizeof(attr));
1001         attr.bp_addr = addr;
1002
1003         if (parse_breakpoint_type(type, &attr))
1004                 return -EINVAL;
1005
1006         /* Provide some defaults if len is not specified */
1007         if (!len) {
1008                 if (attr.bp_type == HW_BREAKPOINT_X)
1009                         len = sizeof(long);
1010                 else
1011                         len = HW_BREAKPOINT_LEN_4;
1012         }
1013
1014         attr.bp_len = len;
1015
1016         attr.type = PERF_TYPE_BREAKPOINT;
1017         attr.sample_period = 1;
1018
1019         return add_event(list, idx, &attr, /*name=*/NULL, /*mertic_id=*/NULL,
1020                          /*config_terms=*/NULL);
1021 }
1022
1023 static int check_type_val(struct parse_events_term *term,
1024                           struct parse_events_error *err,
1025                           int type)
1026 {
1027         if (type == term->type_val)
1028                 return 0;
1029
1030         if (err) {
1031                 parse_events_error__handle(err, term->err_val,
1032                                         type == PARSE_EVENTS__TERM_TYPE_NUM
1033                                         ? strdup("expected numeric value")
1034                                         : strdup("expected string value"),
1035                                         NULL);
1036         }
1037         return -EINVAL;
1038 }
1039
1040 /*
1041  * Update according to parse-events.l
1042  */
1043 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1044         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
1045         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
1046         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
1047         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
1048         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
1049         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
1050         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
1051         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
1052         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
1053         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
1054         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
1055         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
1056         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1057         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1058         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1059         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1060         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1061         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1062         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1063         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1064         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1065         [PARSE_EVENTS__TERM_TYPE_METRIC_ID]             = "metric-id",
1066 };
1067
1068 static bool config_term_shrinked;
1069
1070 static bool
1071 config_term_avail(int term_type, struct parse_events_error *err)
1072 {
1073         char *err_str;
1074
1075         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1076                 parse_events_error__handle(err, -1,
1077                                         strdup("Invalid term_type"), NULL);
1078                 return false;
1079         }
1080         if (!config_term_shrinked)
1081                 return true;
1082
1083         switch (term_type) {
1084         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1085         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1086         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1087         case PARSE_EVENTS__TERM_TYPE_NAME:
1088         case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
1089         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1090         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1091                 return true;
1092         default:
1093                 if (!err)
1094                         return false;
1095
1096                 /* term_type is validated so indexing is safe */
1097                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1098                                 config_term_names[term_type]) >= 0)
1099                         parse_events_error__handle(err, -1, err_str, NULL);
1100                 return false;
1101         }
1102 }
1103
1104 void parse_events__shrink_config_terms(void)
1105 {
1106         config_term_shrinked = true;
1107 }
1108
1109 static int config_term_common(struct perf_event_attr *attr,
1110                               struct parse_events_term *term,
1111                               struct parse_events_error *err)
1112 {
1113 #define CHECK_TYPE_VAL(type)                                               \
1114 do {                                                                       \
1115         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1116                 return -EINVAL;                                            \
1117 } while (0)
1118
1119         switch (term->type_term) {
1120         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1121                 CHECK_TYPE_VAL(NUM);
1122                 attr->config = term->val.num;
1123                 break;
1124         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1125                 CHECK_TYPE_VAL(NUM);
1126                 attr->config1 = term->val.num;
1127                 break;
1128         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1129                 CHECK_TYPE_VAL(NUM);
1130                 attr->config2 = term->val.num;
1131                 break;
1132         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1133                 CHECK_TYPE_VAL(NUM);
1134                 break;
1135         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1136                 CHECK_TYPE_VAL(NUM);
1137                 break;
1138         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1139                 CHECK_TYPE_VAL(STR);
1140                 if (strcmp(term->val.str, "no") &&
1141                     parse_branch_str(term->val.str,
1142                                     &attr->branch_sample_type)) {
1143                         parse_events_error__handle(err, term->err_val,
1144                                         strdup("invalid branch sample type"),
1145                                         NULL);
1146                         return -EINVAL;
1147                 }
1148                 break;
1149         case PARSE_EVENTS__TERM_TYPE_TIME:
1150                 CHECK_TYPE_VAL(NUM);
1151                 if (term->val.num > 1) {
1152                         parse_events_error__handle(err, term->err_val,
1153                                                 strdup("expected 0 or 1"),
1154                                                 NULL);
1155                         return -EINVAL;
1156                 }
1157                 break;
1158         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1159                 CHECK_TYPE_VAL(STR);
1160                 break;
1161         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1162                 CHECK_TYPE_VAL(NUM);
1163                 break;
1164         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1165                 CHECK_TYPE_VAL(NUM);
1166                 break;
1167         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1168                 CHECK_TYPE_VAL(NUM);
1169                 break;
1170         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1171                 CHECK_TYPE_VAL(NUM);
1172                 break;
1173         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1174                 CHECK_TYPE_VAL(NUM);
1175                 break;
1176         case PARSE_EVENTS__TERM_TYPE_NAME:
1177                 CHECK_TYPE_VAL(STR);
1178                 break;
1179         case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
1180                 CHECK_TYPE_VAL(STR);
1181                 break;
1182         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1183                 CHECK_TYPE_VAL(NUM);
1184                 break;
1185         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1186                 CHECK_TYPE_VAL(NUM);
1187                 break;
1188         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1189                 CHECK_TYPE_VAL(NUM);
1190                 if ((unsigned int)term->val.num > 1) {
1191                         parse_events_error__handle(err, term->err_val,
1192                                                 strdup("expected 0 or 1"),
1193                                                 NULL);
1194                         return -EINVAL;
1195                 }
1196                 break;
1197         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1198                 CHECK_TYPE_VAL(NUM);
1199                 break;
1200         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1201                 CHECK_TYPE_VAL(NUM);
1202                 if (term->val.num > UINT_MAX) {
1203                         parse_events_error__handle(err, term->err_val,
1204                                                 strdup("too big"),
1205                                                 NULL);
1206                         return -EINVAL;
1207                 }
1208                 break;
1209         default:
1210                 parse_events_error__handle(err, term->err_term,
1211                                 strdup("unknown term"),
1212                                 parse_events_formats_error_string(NULL));
1213                 return -EINVAL;
1214         }
1215
1216         /*
1217          * Check term availability after basic checking so
1218          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1219          *
1220          * If check availability at the entry of this function,
1221          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1222          * if an invalid config term is provided for legacy events
1223          * (for example, instructions/badterm/...), which is confusing.
1224          */
1225         if (!config_term_avail(term->type_term, err))
1226                 return -EINVAL;
1227         return 0;
1228 #undef CHECK_TYPE_VAL
1229 }
1230
1231 static int config_term_pmu(struct perf_event_attr *attr,
1232                            struct parse_events_term *term,
1233                            struct parse_events_error *err)
1234 {
1235         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1236             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1237                 /*
1238                  * Always succeed for sysfs terms, as we dont know
1239                  * at this point what type they need to have.
1240                  */
1241                 return 0;
1242         else
1243                 return config_term_common(attr, term, err);
1244 }
1245
1246 static int config_term_tracepoint(struct perf_event_attr *attr,
1247                                   struct parse_events_term *term,
1248                                   struct parse_events_error *err)
1249 {
1250         switch (term->type_term) {
1251         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1252         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1253         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1254         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1255         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1256         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1257         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1258         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1259         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1260         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1261                 return config_term_common(attr, term, err);
1262         default:
1263                 if (err) {
1264                         parse_events_error__handle(err, term->err_term,
1265                                 strdup("unknown term"),
1266                                 strdup("valid terms: call-graph,stack-size\n"));
1267                 }
1268                 return -EINVAL;
1269         }
1270
1271         return 0;
1272 }
1273
1274 static int config_attr(struct perf_event_attr *attr,
1275                        struct list_head *head,
1276                        struct parse_events_error *err,
1277                        config_term_func_t config_term)
1278 {
1279         struct parse_events_term *term;
1280
1281         list_for_each_entry(term, head, list)
1282                 if (config_term(attr, term, err))
1283                         return -EINVAL;
1284
1285         return 0;
1286 }
1287
1288 static int get_config_terms(struct list_head *head_config,
1289                             struct list_head *head_terms __maybe_unused)
1290 {
1291 #define ADD_CONFIG_TERM(__type, __weak)                         \
1292         struct evsel_config_term *__t;                  \
1293                                                                 \
1294         __t = zalloc(sizeof(*__t));                             \
1295         if (!__t)                                               \
1296                 return -ENOMEM;                                 \
1297                                                                 \
1298         INIT_LIST_HEAD(&__t->list);                             \
1299         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1300         __t->weak       = __weak;                               \
1301         list_add_tail(&__t->list, head_terms)
1302
1303 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1304 do {                                                            \
1305         ADD_CONFIG_TERM(__type, __weak);                        \
1306         __t->val.__name = __val;                                \
1307 } while (0)
1308
1309 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1310 do {                                                            \
1311         ADD_CONFIG_TERM(__type, __weak);                        \
1312         __t->val.str = strdup(__val);                           \
1313         if (!__t->val.str) {                                    \
1314                 zfree(&__t);                                    \
1315                 return -ENOMEM;                                 \
1316         }                                                       \
1317         __t->free_str = true;                                   \
1318 } while (0)
1319
1320         struct parse_events_term *term;
1321
1322         list_for_each_entry(term, head_config, list) {
1323                 switch (term->type_term) {
1324                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1325                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1326                         break;
1327                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1328                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1329                         break;
1330                 case PARSE_EVENTS__TERM_TYPE_TIME:
1331                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1332                         break;
1333                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1334                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1335                         break;
1336                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1337                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1338                         break;
1339                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1340                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1341                                             term->val.num, term->weak);
1342                         break;
1343                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1344                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1345                                             term->val.num ? 1 : 0, term->weak);
1346                         break;
1347                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1348                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1349                                             term->val.num ? 0 : 1, term->weak);
1350                         break;
1351                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1352                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1353                                             term->val.num, term->weak);
1354                         break;
1355                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1356                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1357                                             term->val.num, term->weak);
1358                         break;
1359                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1360                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1361                                             term->val.num ? 1 : 0, term->weak);
1362                         break;
1363                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1364                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1365                                             term->val.num ? 0 : 1, term->weak);
1366                         break;
1367                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1368                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1369                         break;
1370                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1371                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1372                                             term->val.num ? true : false, term->weak);
1373                         break;
1374                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1375                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1376                                             term->val.num ? 1 : 0, term->weak);
1377                         break;
1378                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1379                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1380                                             term->val.num, term->weak);
1381                         break;
1382                 default:
1383                         break;
1384                 }
1385         }
1386         return 0;
1387 }
1388
1389 /*
1390  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1391  * each bit of attr->config that the user has changed.
1392  */
1393 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1394                            struct list_head *head_terms)
1395 {
1396         struct parse_events_term *term;
1397         u64 bits = 0;
1398         int type;
1399
1400         list_for_each_entry(term, head_config, list) {
1401                 switch (term->type_term) {
1402                 case PARSE_EVENTS__TERM_TYPE_USER:
1403                         type = perf_pmu__format_type(&pmu->format, term->config);
1404                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1405                                 continue;
1406                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1407                         break;
1408                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1409                         bits = ~(u64)0;
1410                         break;
1411                 default:
1412                         break;
1413                 }
1414         }
1415
1416         if (bits)
1417                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1418
1419 #undef ADD_CONFIG_TERM
1420         return 0;
1421 }
1422
1423 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1424                                 const char *sys, const char *event,
1425                                 struct parse_events_error *err,
1426                                 struct list_head *head_config)
1427 {
1428         if (head_config) {
1429                 struct perf_event_attr attr;
1430
1431                 if (config_attr(&attr, head_config, err,
1432                                 config_term_tracepoint))
1433                         return -EINVAL;
1434         }
1435
1436         if (strpbrk(sys, "*?"))
1437                 return add_tracepoint_multi_sys(list, idx, sys, event,
1438                                                 err, head_config);
1439         else
1440                 return add_tracepoint_event(list, idx, sys, event,
1441                                             err, head_config);
1442 }
1443
1444 int parse_events_add_numeric(struct parse_events_state *parse_state,
1445                              struct list_head *list,
1446                              u32 type, u64 config,
1447                              struct list_head *head_config)
1448 {
1449         struct perf_event_attr attr;
1450         LIST_HEAD(config_terms);
1451         const char *name, *metric_id;
1452         bool hybrid;
1453         int ret;
1454
1455         memset(&attr, 0, sizeof(attr));
1456         attr.type = type;
1457         attr.config = config;
1458
1459         if (head_config) {
1460                 if (config_attr(&attr, head_config, parse_state->error,
1461                                 config_term_common))
1462                         return -EINVAL;
1463
1464                 if (get_config_terms(head_config, &config_terms))
1465                         return -ENOMEM;
1466         }
1467
1468         name = get_config_name(head_config);
1469         metric_id = get_config_metric_id(head_config);
1470         ret = parse_events__add_numeric_hybrid(parse_state, list, &attr,
1471                                                name, metric_id,
1472                                                &config_terms, &hybrid);
1473         if (hybrid)
1474                 goto out_free_terms;
1475
1476         ret = add_event(list, &parse_state->idx, &attr, name, metric_id,
1477                         &config_terms);
1478 out_free_terms:
1479         free_config_terms(&config_terms);
1480         return ret;
1481 }
1482
1483 int parse_events_add_tool(struct parse_events_state *parse_state,
1484                           struct list_head *list,
1485                           int tool_event)
1486 {
1487         return add_event_tool(list, &parse_state->idx, tool_event);
1488 }
1489
1490 static bool config_term_percore(struct list_head *config_terms)
1491 {
1492         struct evsel_config_term *term;
1493
1494         list_for_each_entry(term, config_terms, list) {
1495                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1496                         return term->val.percore;
1497         }
1498
1499         return false;
1500 }
1501
1502 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state,
1503                                            struct list_head *list, char *name,
1504                                            struct list_head *head_config)
1505 {
1506         struct parse_events_term *term;
1507         int ret = -1;
1508
1509         if (parse_state->fake_pmu || !head_config || list_empty(head_config) ||
1510             !perf_pmu__is_hybrid(name)) {
1511                 return -1;
1512         }
1513
1514         /*
1515          * More than one term in list.
1516          */
1517         if (head_config->next && head_config->next->next != head_config)
1518                 return -1;
1519
1520         term = list_first_entry(head_config, struct parse_events_term, list);
1521         if (term && term->config && strcmp(term->config, "event")) {
1522                 ret = parse_events__with_hybrid_pmu(parse_state, term->config,
1523                                                     name, list);
1524         }
1525
1526         return ret;
1527 }
1528
1529 int parse_events_add_pmu(struct parse_events_state *parse_state,
1530                          struct list_head *list, char *name,
1531                          struct list_head *head_config,
1532                          bool auto_merge_stats,
1533                          bool use_alias)
1534 {
1535         struct perf_event_attr attr;
1536         struct perf_pmu_info info;
1537         struct perf_pmu *pmu;
1538         struct evsel *evsel;
1539         struct parse_events_error *err = parse_state->error;
1540         bool use_uncore_alias;
1541         LIST_HEAD(config_terms);
1542
1543         pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1544
1545         if (verbose > 1 && !(pmu && pmu->selectable)) {
1546                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1547                         name);
1548                 if (head_config) {
1549                         struct parse_events_term *term;
1550
1551                         list_for_each_entry(term, head_config, list) {
1552                                 fprintf(stderr, "%s,", term->config);
1553                         }
1554                 }
1555                 fprintf(stderr, "' that may result in non-fatal errors\n");
1556         }
1557
1558         if (!pmu) {
1559                 char *err_str;
1560
1561                 if (asprintf(&err_str,
1562                                 "Cannot find PMU `%s'. Missing kernel support?",
1563                                 name) >= 0)
1564                         parse_events_error__handle(err, 0, err_str, NULL);
1565                 return -EINVAL;
1566         }
1567
1568         if (pmu->default_config) {
1569                 memcpy(&attr, pmu->default_config,
1570                        sizeof(struct perf_event_attr));
1571         } else {
1572                 memset(&attr, 0, sizeof(attr));
1573         }
1574
1575         use_uncore_alias = (pmu->is_uncore && use_alias);
1576
1577         if (!head_config) {
1578                 attr.type = pmu->type;
1579                 evsel = __add_event(list, &parse_state->idx, &attr,
1580                                     /*init_attr=*/true, /*name=*/NULL,
1581                                     /*metric_id=*/NULL, pmu,
1582                                     /*config_terms=*/NULL, auto_merge_stats,
1583                                     /*cpu_list=*/NULL);
1584                 if (evsel) {
1585                         evsel->pmu_name = name ? strdup(name) : NULL;
1586                         evsel->use_uncore_alias = use_uncore_alias;
1587                         return 0;
1588                 } else {
1589                         return -ENOMEM;
1590                 }
1591         }
1592
1593         if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1594                 return -EINVAL;
1595
1596         if (verbose > 1) {
1597                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1598                         name);
1599                 if (head_config) {
1600                         struct parse_events_term *term;
1601
1602                         list_for_each_entry(term, head_config, list) {
1603                                 fprintf(stderr, "%s,", term->config);
1604                         }
1605                 }
1606                 fprintf(stderr, "' that may result in non-fatal errors\n");
1607         }
1608
1609         /*
1610          * Configure hardcoded terms first, no need to check
1611          * return value when called with fail == 0 ;)
1612          */
1613         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1614                 return -EINVAL;
1615
1616         if (get_config_terms(head_config, &config_terms))
1617                 return -ENOMEM;
1618
1619         /*
1620          * When using default config, record which bits of attr->config were
1621          * changed by the user.
1622          */
1623         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1624                 return -ENOMEM;
1625
1626         if (!parse_events__inside_hybrid_pmu(parse_state, list, name,
1627                                              head_config)) {
1628                 return 0;
1629         }
1630
1631         if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1632                 free_config_terms(&config_terms);
1633                 return -EINVAL;
1634         }
1635
1636         evsel = __add_event(list, &parse_state->idx, &attr, /*init_attr=*/true,
1637                             get_config_name(head_config),
1638                             get_config_metric_id(head_config), pmu,
1639                             &config_terms, auto_merge_stats, /*cpu_list=*/NULL);
1640         if (!evsel)
1641                 return -ENOMEM;
1642
1643         if (evsel->name)
1644                 evsel->use_config_name = true;
1645
1646         evsel->pmu_name = name ? strdup(name) : NULL;
1647         evsel->use_uncore_alias = use_uncore_alias;
1648         evsel->percore = config_term_percore(&evsel->config_terms);
1649
1650         if (parse_state->fake_pmu)
1651                 return 0;
1652
1653         free((char *)evsel->unit);
1654         evsel->unit = strdup(info.unit);
1655         evsel->scale = info.scale;
1656         evsel->per_pkg = info.per_pkg;
1657         evsel->snapshot = info.snapshot;
1658         evsel->metric_expr = info.metric_expr;
1659         evsel->metric_name = info.metric_name;
1660         return 0;
1661 }
1662
1663 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1664                                char *str, struct list_head *head,
1665                                struct list_head **listp)
1666 {
1667         struct parse_events_term *term;
1668         struct list_head *list = NULL;
1669         struct list_head *orig_head = NULL;
1670         struct perf_pmu *pmu = NULL;
1671         int ok = 0;
1672         char *config;
1673
1674         *listp = NULL;
1675
1676         if (!head) {
1677                 head = malloc(sizeof(struct list_head));
1678                 if (!head)
1679                         goto out_err;
1680
1681                 INIT_LIST_HEAD(head);
1682         }
1683         config = strdup(str);
1684         if (!config)
1685                 goto out_err;
1686
1687         if (parse_events_term__num(&term,
1688                                    PARSE_EVENTS__TERM_TYPE_USER,
1689                                    config, 1, false, &config,
1690                                         NULL) < 0) {
1691                 free(config);
1692                 goto out_err;
1693         }
1694         list_add_tail(&term->list, head);
1695
1696         /* Add it for all PMUs that support the alias */
1697         list = malloc(sizeof(struct list_head));
1698         if (!list)
1699                 goto out_err;
1700
1701         INIT_LIST_HEAD(list);
1702
1703         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1704                 struct perf_pmu_alias *alias;
1705
1706                 list_for_each_entry(alias, &pmu->aliases, list) {
1707                         if (!strcasecmp(alias->name, str)) {
1708                                 parse_events_copy_term_list(head, &orig_head);
1709                                 if (!parse_events_add_pmu(parse_state, list,
1710                                                           pmu->name, orig_head,
1711                                                           true, true)) {
1712                                         pr_debug("%s -> %s/%s/\n", str,
1713                                                  pmu->name, alias->str);
1714                                         ok++;
1715                                 }
1716                                 parse_events_terms__delete(orig_head);
1717                         }
1718                 }
1719         }
1720
1721         if (parse_state->fake_pmu) {
1722                 if (!parse_events_add_pmu(parse_state, list, str, head,
1723                                           true, true)) {
1724                         pr_debug("%s -> %s/%s/\n", str, "fake_pmu", str);
1725                         ok++;
1726                 }
1727         }
1728
1729 out_err:
1730         if (ok)
1731                 *listp = list;
1732         else
1733                 free(list);
1734
1735         parse_events_terms__delete(head);
1736         return ok ? 0 : -1;
1737 }
1738
1739 int parse_events__modifier_group(struct list_head *list,
1740                                  char *event_mod)
1741 {
1742         return parse_events__modifier_event(list, event_mod, true);
1743 }
1744
1745 /*
1746  * Check if the two uncore PMUs are from the same uncore block
1747  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1748  */
1749 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1750 {
1751         char *end_a, *end_b;
1752
1753         end_a = strrchr(pmu_name_a, '_');
1754         end_b = strrchr(pmu_name_b, '_');
1755
1756         if (!end_a || !end_b)
1757                 return false;
1758
1759         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1760                 return false;
1761
1762         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1763 }
1764
1765 static int
1766 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1767                                            struct parse_events_state *parse_state)
1768 {
1769         struct evsel *evsel, *leader;
1770         uintptr_t *leaders;
1771         bool is_leader = true;
1772         int i, nr_pmu = 0, total_members, ret = 0;
1773
1774         leader = list_first_entry(list, struct evsel, core.node);
1775         evsel = list_last_entry(list, struct evsel, core.node);
1776         total_members = evsel->core.idx - leader->core.idx + 1;
1777
1778         leaders = calloc(total_members, sizeof(uintptr_t));
1779         if (WARN_ON(!leaders))
1780                 return 0;
1781
1782         /*
1783          * Going through the whole group and doing sanity check.
1784          * All members must use alias, and be from the same uncore block.
1785          * Also, storing the leader events in an array.
1786          */
1787         __evlist__for_each_entry(list, evsel) {
1788
1789                 /* Only split the uncore group which members use alias */
1790                 if (!evsel->use_uncore_alias)
1791                         goto out;
1792
1793                 /* The events must be from the same uncore block */
1794                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1795                         goto out;
1796
1797                 if (!is_leader)
1798                         continue;
1799                 /*
1800                  * If the event's PMU name starts to repeat, it must be a new
1801                  * event. That can be used to distinguish the leader from
1802                  * other members, even they have the same event name.
1803                  */
1804                 if ((leader != evsel) &&
1805                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1806                         is_leader = false;
1807                         continue;
1808                 }
1809
1810                 /* Store the leader event for each PMU */
1811                 leaders[nr_pmu++] = (uintptr_t) evsel;
1812         }
1813
1814         /* only one event alias */
1815         if (nr_pmu == total_members) {
1816                 parse_state->nr_groups--;
1817                 goto handled;
1818         }
1819
1820         /*
1821          * An uncore event alias is a joint name which means the same event
1822          * runs on all PMUs of a block.
1823          * Perf doesn't support mixed events from different PMUs in the same
1824          * group. The big group has to be split into multiple small groups
1825          * which only include the events from the same PMU.
1826          *
1827          * Here the uncore event aliases must be from the same uncore block.
1828          * The number of PMUs must be same for each alias. The number of new
1829          * small groups equals to the number of PMUs.
1830          * Setting the leader event for corresponding members in each group.
1831          */
1832         i = 0;
1833         __evlist__for_each_entry(list, evsel) {
1834                 if (i >= nr_pmu)
1835                         i = 0;
1836                 evsel__set_leader(evsel, (struct evsel *) leaders[i++]);
1837         }
1838
1839         /* The number of members and group name are same for each group */
1840         for (i = 0; i < nr_pmu; i++) {
1841                 evsel = (struct evsel *) leaders[i];
1842                 evsel->core.nr_members = total_members / nr_pmu;
1843                 evsel->group_name = name ? strdup(name) : NULL;
1844         }
1845
1846         /* Take the new small groups into account */
1847         parse_state->nr_groups += nr_pmu - 1;
1848
1849 handled:
1850         ret = 1;
1851 out:
1852         free(leaders);
1853         return ret;
1854 }
1855
1856 __weak struct evsel *arch_evlist__leader(struct list_head *list)
1857 {
1858         return list_first_entry(list, struct evsel, core.node);
1859 }
1860
1861 void parse_events__set_leader(char *name, struct list_head *list,
1862                               struct parse_events_state *parse_state)
1863 {
1864         struct evsel *leader;
1865
1866         if (list_empty(list)) {
1867                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1868                 return;
1869         }
1870
1871         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1872                 return;
1873
1874         leader = arch_evlist__leader(list);
1875         __perf_evlist__set_leader(list, &leader->core);
1876         leader->group_name = name ? strdup(name) : NULL;
1877         list_move(&leader->core.node, list);
1878 }
1879
1880 /* list_event is assumed to point to malloc'ed memory */
1881 void parse_events_update_lists(struct list_head *list_event,
1882                                struct list_head *list_all)
1883 {
1884         /*
1885          * Called for single event definition. Update the
1886          * 'all event' list, and reinit the 'single event'
1887          * list, for next event definition.
1888          */
1889         list_splice_tail(list_event, list_all);
1890         free(list_event);
1891 }
1892
1893 struct event_modifier {
1894         int eu;
1895         int ek;
1896         int eh;
1897         int eH;
1898         int eG;
1899         int eI;
1900         int precise;
1901         int precise_max;
1902         int exclude_GH;
1903         int sample_read;
1904         int pinned;
1905         int weak;
1906         int exclusive;
1907         int bpf_counter;
1908 };
1909
1910 static int get_event_modifier(struct event_modifier *mod, char *str,
1911                                struct evsel *evsel)
1912 {
1913         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1914         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1915         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1916         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1917         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1918         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1919         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1920         int precise_max = 0;
1921         int sample_read = 0;
1922         int pinned = evsel ? evsel->core.attr.pinned : 0;
1923         int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1924
1925         int exclude = eu | ek | eh;
1926         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1927         int weak = 0;
1928         int bpf_counter = 0;
1929
1930         memset(mod, 0, sizeof(*mod));
1931
1932         while (*str) {
1933                 if (*str == 'u') {
1934                         if (!exclude)
1935                                 exclude = eu = ek = eh = 1;
1936                         if (!exclude_GH && !perf_guest)
1937                                 eG = 1;
1938                         eu = 0;
1939                 } else if (*str == 'k') {
1940                         if (!exclude)
1941                                 exclude = eu = ek = eh = 1;
1942                         ek = 0;
1943                 } else if (*str == 'h') {
1944                         if (!exclude)
1945                                 exclude = eu = ek = eh = 1;
1946                         eh = 0;
1947                 } else if (*str == 'G') {
1948                         if (!exclude_GH)
1949                                 exclude_GH = eG = eH = 1;
1950                         eG = 0;
1951                 } else if (*str == 'H') {
1952                         if (!exclude_GH)
1953                                 exclude_GH = eG = eH = 1;
1954                         eH = 0;
1955                 } else if (*str == 'I') {
1956                         eI = 1;
1957                 } else if (*str == 'p') {
1958                         precise++;
1959                         /* use of precise requires exclude_guest */
1960                         if (!exclude_GH)
1961                                 eG = 1;
1962                 } else if (*str == 'P') {
1963                         precise_max = 1;
1964                 } else if (*str == 'S') {
1965                         sample_read = 1;
1966                 } else if (*str == 'D') {
1967                         pinned = 1;
1968                 } else if (*str == 'e') {
1969                         exclusive = 1;
1970                 } else if (*str == 'W') {
1971                         weak = 1;
1972                 } else if (*str == 'b') {
1973                         bpf_counter = 1;
1974                 } else
1975                         break;
1976
1977                 ++str;
1978         }
1979
1980         /*
1981          * precise ip:
1982          *
1983          *  0 - SAMPLE_IP can have arbitrary skid
1984          *  1 - SAMPLE_IP must have constant skid
1985          *  2 - SAMPLE_IP requested to have 0 skid
1986          *  3 - SAMPLE_IP must have 0 skid
1987          *
1988          *  See also PERF_RECORD_MISC_EXACT_IP
1989          */
1990         if (precise > 3)
1991                 return -EINVAL;
1992
1993         mod->eu = eu;
1994         mod->ek = ek;
1995         mod->eh = eh;
1996         mod->eH = eH;
1997         mod->eG = eG;
1998         mod->eI = eI;
1999         mod->precise = precise;
2000         mod->precise_max = precise_max;
2001         mod->exclude_GH = exclude_GH;
2002         mod->sample_read = sample_read;
2003         mod->pinned = pinned;
2004         mod->weak = weak;
2005         mod->bpf_counter = bpf_counter;
2006         mod->exclusive = exclusive;
2007
2008         return 0;
2009 }
2010
2011 /*
2012  * Basic modifier sanity check to validate it contains only one
2013  * instance of any modifier (apart from 'p') present.
2014  */
2015 static int check_modifier(char *str)
2016 {
2017         char *p = str;
2018
2019         /* The sizeof includes 0 byte as well. */
2020         if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1))
2021                 return -1;
2022
2023         while (*p) {
2024                 if (*p != 'p' && strchr(p + 1, *p))
2025                         return -1;
2026                 p++;
2027         }
2028
2029         return 0;
2030 }
2031
2032 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
2033 {
2034         struct evsel *evsel;
2035         struct event_modifier mod;
2036
2037         if (str == NULL)
2038                 return 0;
2039
2040         if (check_modifier(str))
2041                 return -EINVAL;
2042
2043         if (!add && get_event_modifier(&mod, str, NULL))
2044                 return -EINVAL;
2045
2046         __evlist__for_each_entry(list, evsel) {
2047                 if (add && get_event_modifier(&mod, str, evsel))
2048                         return -EINVAL;
2049
2050                 evsel->core.attr.exclude_user   = mod.eu;
2051                 evsel->core.attr.exclude_kernel = mod.ek;
2052                 evsel->core.attr.exclude_hv     = mod.eh;
2053                 evsel->core.attr.precise_ip     = mod.precise;
2054                 evsel->core.attr.exclude_host   = mod.eH;
2055                 evsel->core.attr.exclude_guest  = mod.eG;
2056                 evsel->core.attr.exclude_idle   = mod.eI;
2057                 evsel->exclude_GH          = mod.exclude_GH;
2058                 evsel->sample_read         = mod.sample_read;
2059                 evsel->precise_max         = mod.precise_max;
2060                 evsel->weak_group          = mod.weak;
2061                 evsel->bpf_counter         = mod.bpf_counter;
2062
2063                 if (evsel__is_group_leader(evsel)) {
2064                         evsel->core.attr.pinned = mod.pinned;
2065                         evsel->core.attr.exclusive = mod.exclusive;
2066                 }
2067         }
2068
2069         return 0;
2070 }
2071
2072 int parse_events_name(struct list_head *list, const char *name)
2073 {
2074         struct evsel *evsel;
2075
2076         __evlist__for_each_entry(list, evsel) {
2077                 if (!evsel->name)
2078                         evsel->name = strdup(name);
2079         }
2080
2081         return 0;
2082 }
2083
2084 static int
2085 comp_pmu(const void *p1, const void *p2)
2086 {
2087         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
2088         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
2089
2090         return strcasecmp(pmu1->symbol, pmu2->symbol);
2091 }
2092
2093 static void perf_pmu__parse_cleanup(void)
2094 {
2095         if (perf_pmu_events_list_num > 0) {
2096                 struct perf_pmu_event_symbol *p;
2097                 int i;
2098
2099                 for (i = 0; i < perf_pmu_events_list_num; i++) {
2100                         p = perf_pmu_events_list + i;
2101                         zfree(&p->symbol);
2102                 }
2103                 zfree(&perf_pmu_events_list);
2104                 perf_pmu_events_list_num = 0;
2105         }
2106 }
2107
2108 #define SET_SYMBOL(str, stype)          \
2109 do {                                    \
2110         p->symbol = str;                \
2111         if (!p->symbol)                 \
2112                 goto err;               \
2113         p->type = stype;                \
2114 } while (0)
2115
2116 /*
2117  * Read the pmu events list from sysfs
2118  * Save it into perf_pmu_events_list
2119  */
2120 static void perf_pmu__parse_init(void)
2121 {
2122
2123         struct perf_pmu *pmu = NULL;
2124         struct perf_pmu_alias *alias;
2125         int len = 0;
2126
2127         pmu = NULL;
2128         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2129                 list_for_each_entry(alias, &pmu->aliases, list) {
2130                         char *tmp = strchr(alias->name, '-');
2131
2132                         if (tmp) {
2133                                 char *tmp2 = NULL;
2134
2135                                 tmp2 = strchr(tmp + 1, '-');
2136                                 len++;
2137                                 if (tmp2)
2138                                         len++;
2139                         }
2140
2141                         len++;
2142                 }
2143         }
2144
2145         if (len == 0) {
2146                 perf_pmu_events_list_num = -1;
2147                 return;
2148         }
2149         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2150         if (!perf_pmu_events_list)
2151                 return;
2152         perf_pmu_events_list_num = len;
2153
2154         len = 0;
2155         pmu = NULL;
2156         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2157                 list_for_each_entry(alias, &pmu->aliases, list) {
2158                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2159                         char *tmp = strchr(alias->name, '-');
2160                         char *tmp2 = NULL;
2161
2162                         if (tmp)
2163                                 tmp2 = strchr(tmp + 1, '-');
2164                         if (tmp2) {
2165                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2166                                                 PMU_EVENT_SYMBOL_PREFIX);
2167                                 p++;
2168                                 tmp++;
2169                                 SET_SYMBOL(strndup(tmp, tmp2 - tmp), PMU_EVENT_SYMBOL_SUFFIX);
2170                                 p++;
2171                                 SET_SYMBOL(strdup(++tmp2), PMU_EVENT_SYMBOL_SUFFIX2);
2172                                 len += 3;
2173                         } else if (tmp) {
2174                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2175                                                 PMU_EVENT_SYMBOL_PREFIX);
2176                                 p++;
2177                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2178                                 len += 2;
2179                         } else {
2180                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2181                                 len++;
2182                         }
2183                 }
2184         }
2185         qsort(perf_pmu_events_list, len,
2186                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2187
2188         return;
2189 err:
2190         perf_pmu__parse_cleanup();
2191 }
2192
2193 /*
2194  * This function injects special term in
2195  * perf_pmu_events_list so the test code
2196  * can check on this functionality.
2197  */
2198 int perf_pmu__test_parse_init(void)
2199 {
2200         struct perf_pmu_event_symbol *list, *tmp, symbols[] = {
2201                 {(char *)"read", PMU_EVENT_SYMBOL},
2202                 {(char *)"event", PMU_EVENT_SYMBOL_PREFIX},
2203                 {(char *)"two", PMU_EVENT_SYMBOL_SUFFIX},
2204                 {(char *)"hyphen", PMU_EVENT_SYMBOL_SUFFIX},
2205                 {(char *)"hyph", PMU_EVENT_SYMBOL_SUFFIX2},
2206         };
2207         unsigned long i, j;
2208
2209         tmp = list = malloc(sizeof(*list) * ARRAY_SIZE(symbols));
2210         if (!list)
2211                 return -ENOMEM;
2212
2213         for (i = 0; i < ARRAY_SIZE(symbols); i++, tmp++) {
2214                 tmp->type = symbols[i].type;
2215                 tmp->symbol = strdup(symbols[i].symbol);
2216                 if (!tmp->symbol)
2217                         goto err_free;
2218         }
2219
2220         perf_pmu_events_list = list;
2221         perf_pmu_events_list_num = ARRAY_SIZE(symbols);
2222
2223         qsort(perf_pmu_events_list, ARRAY_SIZE(symbols),
2224               sizeof(struct perf_pmu_event_symbol), comp_pmu);
2225         return 0;
2226
2227 err_free:
2228         for (j = 0, tmp = list; j < i; j++, tmp++)
2229                 free(tmp->symbol);
2230         free(list);
2231         return -ENOMEM;
2232 }
2233
2234 enum perf_pmu_event_symbol_type
2235 perf_pmu__parse_check(const char *name)
2236 {
2237         struct perf_pmu_event_symbol p, *r;
2238
2239         /* scan kernel pmu events from sysfs if needed */
2240         if (perf_pmu_events_list_num == 0)
2241                 perf_pmu__parse_init();
2242         /*
2243          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2244          * cpu-cycles has been handled by hardcode.
2245          * So it must be cpu// events, not kernel pmu event.
2246          */
2247         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2248                 return PMU_EVENT_SYMBOL_ERR;
2249
2250         p.symbol = strdup(name);
2251         r = bsearch(&p, perf_pmu_events_list,
2252                         (size_t) perf_pmu_events_list_num,
2253                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2254         zfree(&p.symbol);
2255         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2256 }
2257
2258 static int parse_events__scanner(const char *str,
2259                                  struct parse_events_state *parse_state)
2260 {
2261         YY_BUFFER_STATE buffer;
2262         void *scanner;
2263         int ret;
2264
2265         ret = parse_events_lex_init_extra(parse_state, &scanner);
2266         if (ret)
2267                 return ret;
2268
2269         buffer = parse_events__scan_string(str, scanner);
2270
2271 #ifdef PARSER_DEBUG
2272         parse_events_debug = 1;
2273         parse_events_set_debug(1, scanner);
2274 #endif
2275         ret = parse_events_parse(parse_state, scanner);
2276
2277         parse_events__flush_buffer(buffer, scanner);
2278         parse_events__delete_buffer(buffer, scanner);
2279         parse_events_lex_destroy(scanner);
2280         return ret;
2281 }
2282
2283 /*
2284  * parse event config string, return a list of event terms.
2285  */
2286 int parse_events_terms(struct list_head *terms, const char *str)
2287 {
2288         struct parse_events_state parse_state = {
2289                 .terms  = NULL,
2290                 .stoken = PE_START_TERMS,
2291         };
2292         int ret;
2293
2294         ret = parse_events__scanner(str, &parse_state);
2295         perf_pmu__parse_cleanup();
2296
2297         if (!ret) {
2298                 list_splice(parse_state.terms, terms);
2299                 zfree(&parse_state.terms);
2300                 return 0;
2301         }
2302
2303         parse_events_terms__delete(parse_state.terms);
2304         return ret;
2305 }
2306
2307 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
2308                                          const char *str, char *pmu_name,
2309                                          struct list_head *list)
2310 {
2311         struct parse_events_state ps = {
2312                 .list            = LIST_HEAD_INIT(ps.list),
2313                 .stoken          = PE_START_EVENTS,
2314                 .hybrid_pmu_name = pmu_name,
2315                 .idx             = parse_state->idx,
2316         };
2317         int ret;
2318
2319         ret = parse_events__scanner(str, &ps);
2320         perf_pmu__parse_cleanup();
2321
2322         if (!ret) {
2323                 if (!list_empty(&ps.list)) {
2324                         list_splice(&ps.list, list);
2325                         parse_state->idx = ps.idx;
2326                         return 0;
2327                 } else
2328                         return -1;
2329         }
2330
2331         return ret;
2332 }
2333
2334 int __parse_events(struct evlist *evlist, const char *str,
2335                    struct parse_events_error *err, struct perf_pmu *fake_pmu)
2336 {
2337         struct parse_events_state parse_state = {
2338                 .list     = LIST_HEAD_INIT(parse_state.list),
2339                 .idx      = evlist->core.nr_entries,
2340                 .error    = err,
2341                 .evlist   = evlist,
2342                 .stoken   = PE_START_EVENTS,
2343                 .fake_pmu = fake_pmu,
2344         };
2345         int ret;
2346
2347         ret = parse_events__scanner(str, &parse_state);
2348         perf_pmu__parse_cleanup();
2349
2350         if (!ret && list_empty(&parse_state.list)) {
2351                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2352                 return -1;
2353         }
2354
2355         /*
2356          * Add list to the evlist even with errors to allow callers to clean up.
2357          */
2358         evlist__splice_list_tail(evlist, &parse_state.list);
2359
2360         if (!ret) {
2361                 struct evsel *last;
2362
2363                 evlist->core.nr_groups += parse_state.nr_groups;
2364                 last = evlist__last(evlist);
2365                 last->cmdline_group_boundary = true;
2366
2367                 return 0;
2368         }
2369
2370         /*
2371          * There are 2 users - builtin-record and builtin-test objects.
2372          * Both call evlist__delete in case of error, so we dont
2373          * need to bother.
2374          */
2375         return ret;
2376 }
2377
2378 void parse_events_error__init(struct parse_events_error *err)
2379 {
2380         bzero(err, sizeof(*err));
2381 }
2382
2383 void parse_events_error__exit(struct parse_events_error *err)
2384 {
2385         zfree(&err->str);
2386         zfree(&err->help);
2387         zfree(&err->first_str);
2388         zfree(&err->first_help);
2389 }
2390
2391 void parse_events_error__handle(struct parse_events_error *err, int idx,
2392                                 char *str, char *help)
2393 {
2394         if (WARN(!str, "WARNING: failed to provide error string\n")) {
2395                 free(help);
2396                 return;
2397         }
2398         switch (err->num_errors) {
2399         case 0:
2400                 err->idx = idx;
2401                 err->str = str;
2402                 err->help = help;
2403                 break;
2404         case 1:
2405                 err->first_idx = err->idx;
2406                 err->idx = idx;
2407                 err->first_str = err->str;
2408                 err->str = str;
2409                 err->first_help = err->help;
2410                 err->help = help;
2411                 break;
2412         default:
2413                 pr_debug("Multiple errors dropping message: %s (%s)\n",
2414                         err->str, err->help);
2415                 free(err->str);
2416                 err->str = str;
2417                 free(err->help);
2418                 err->help = help;
2419                 break;
2420         }
2421         err->num_errors++;
2422 }
2423
2424 #define MAX_WIDTH 1000
2425 static int get_term_width(void)
2426 {
2427         struct winsize ws;
2428
2429         get_term_dimensions(&ws);
2430         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2431 }
2432
2433 static void __parse_events_error__print(int err_idx, const char *err_str,
2434                                         const char *err_help, const char *event)
2435 {
2436         const char *str = "invalid or unsupported event: ";
2437         char _buf[MAX_WIDTH];
2438         char *buf = (char *) event;
2439         int idx = 0;
2440         if (err_str) {
2441                 /* -2 for extra '' in the final fprintf */
2442                 int width       = get_term_width() - 2;
2443                 int len_event   = strlen(event);
2444                 int len_str, max_len, cut = 0;
2445
2446                 /*
2447                  * Maximum error index indent, we will cut
2448                  * the event string if it's bigger.
2449                  */
2450                 int max_err_idx = 13;
2451
2452                 /*
2453                  * Let's be specific with the message when
2454                  * we have the precise error.
2455                  */
2456                 str     = "event syntax error: ";
2457                 len_str = strlen(str);
2458                 max_len = width - len_str;
2459
2460                 buf = _buf;
2461
2462                 /* We're cutting from the beginning. */
2463                 if (err_idx > max_err_idx)
2464                         cut = err_idx - max_err_idx;
2465
2466                 strncpy(buf, event + cut, max_len);
2467
2468                 /* Mark cut parts with '..' on both sides. */
2469                 if (cut)
2470                         buf[0] = buf[1] = '.';
2471
2472                 if ((len_event - cut) > max_len) {
2473                         buf[max_len - 1] = buf[max_len - 2] = '.';
2474                         buf[max_len] = 0;
2475                 }
2476
2477                 idx = len_str + err_idx - cut;
2478         }
2479
2480         fprintf(stderr, "%s'%s'\n", str, buf);
2481         if (idx) {
2482                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2483                 if (err_help)
2484                         fprintf(stderr, "\n%s\n", err_help);
2485         }
2486 }
2487
2488 void parse_events_error__print(struct parse_events_error *err,
2489                                const char *event)
2490 {
2491         if (!err->num_errors)
2492                 return;
2493
2494         __parse_events_error__print(err->idx, err->str, err->help, event);
2495
2496         if (err->num_errors > 1) {
2497                 fputs("\nInitial error:\n", stderr);
2498                 __parse_events_error__print(err->first_idx, err->first_str,
2499                                         err->first_help, event);
2500         }
2501 }
2502
2503 #undef MAX_WIDTH
2504
2505 int parse_events_option(const struct option *opt, const char *str,
2506                         int unset __maybe_unused)
2507 {
2508         struct evlist *evlist = *(struct evlist **)opt->value;
2509         struct parse_events_error err;
2510         int ret;
2511
2512         parse_events_error__init(&err);
2513         ret = parse_events(evlist, str, &err);
2514
2515         if (ret) {
2516                 parse_events_error__print(&err, str);
2517                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2518         }
2519         parse_events_error__exit(&err);
2520
2521         return ret;
2522 }
2523
2524 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2525 {
2526         struct evlist **evlistp = opt->value;
2527         int ret;
2528
2529         if (*evlistp == NULL) {
2530                 *evlistp = evlist__new();
2531
2532                 if (*evlistp == NULL) {
2533                         fprintf(stderr, "Not enough memory to create evlist\n");
2534                         return -1;
2535                 }
2536         }
2537
2538         ret = parse_events_option(opt, str, unset);
2539         if (ret) {
2540                 evlist__delete(*evlistp);
2541                 *evlistp = NULL;
2542         }
2543
2544         return ret;
2545 }
2546
2547 static int
2548 foreach_evsel_in_last_glob(struct evlist *evlist,
2549                            int (*func)(struct evsel *evsel,
2550                                        const void *arg),
2551                            const void *arg)
2552 {
2553         struct evsel *last = NULL;
2554         int err;
2555
2556         /*
2557          * Don't return when list_empty, give func a chance to report
2558          * error when it found last == NULL.
2559          *
2560          * So no need to WARN here, let *func do this.
2561          */
2562         if (evlist->core.nr_entries > 0)
2563                 last = evlist__last(evlist);
2564
2565         do {
2566                 err = (*func)(last, arg);
2567                 if (err)
2568                         return -1;
2569                 if (!last)
2570                         return 0;
2571
2572                 if (last->core.node.prev == &evlist->core.entries)
2573                         return 0;
2574                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2575         } while (!last->cmdline_group_boundary);
2576
2577         return 0;
2578 }
2579
2580 static int set_filter(struct evsel *evsel, const void *arg)
2581 {
2582         const char *str = arg;
2583         bool found = false;
2584         int nr_addr_filters = 0;
2585         struct perf_pmu *pmu = NULL;
2586
2587         if (evsel == NULL) {
2588                 fprintf(stderr,
2589                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2590                 return -1;
2591         }
2592
2593         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2594                 if (evsel__append_tp_filter(evsel, str) < 0) {
2595                         fprintf(stderr,
2596                                 "not enough memory to hold filter string\n");
2597                         return -1;
2598                 }
2599
2600                 return 0;
2601         }
2602
2603         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2604                 if (pmu->type == evsel->core.attr.type) {
2605                         found = true;
2606                         break;
2607                 }
2608
2609         if (found)
2610                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2611                                     "%d", &nr_addr_filters);
2612
2613         if (!nr_addr_filters) {
2614                 fprintf(stderr,
2615                         "This CPU does not support address filtering\n");
2616                 return -1;
2617         }
2618
2619         if (evsel__append_addr_filter(evsel, str) < 0) {
2620                 fprintf(stderr,
2621                         "not enough memory to hold filter string\n");
2622                 return -1;
2623         }
2624
2625         return 0;
2626 }
2627
2628 int parse_filter(const struct option *opt, const char *str,
2629                  int unset __maybe_unused)
2630 {
2631         struct evlist *evlist = *(struct evlist **)opt->value;
2632
2633         return foreach_evsel_in_last_glob(evlist, set_filter,
2634                                           (const void *)str);
2635 }
2636
2637 static int add_exclude_perf_filter(struct evsel *evsel,
2638                                    const void *arg __maybe_unused)
2639 {
2640         char new_filter[64];
2641
2642         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2643                 fprintf(stderr,
2644                         "--exclude-perf option should follow a -e tracepoint option\n");
2645                 return -1;
2646         }
2647
2648         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2649
2650         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2651                 fprintf(stderr,
2652                         "not enough memory to hold filter string\n");
2653                 return -1;
2654         }
2655
2656         return 0;
2657 }
2658
2659 int exclude_perf(const struct option *opt,
2660                  const char *arg __maybe_unused,
2661                  int unset __maybe_unused)
2662 {
2663         struct evlist *evlist = *(struct evlist **)opt->value;
2664
2665         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2666                                           NULL);
2667 }
2668
2669 static const char * const event_type_descriptors[] = {
2670         "Hardware event",
2671         "Software event",
2672         "Tracepoint event",
2673         "Hardware cache event",
2674         "Raw hardware event descriptor",
2675         "Hardware breakpoint",
2676 };
2677
2678 static int cmp_string(const void *a, const void *b)
2679 {
2680         const char * const *as = a;
2681         const char * const *bs = b;
2682
2683         return strcmp(*as, *bs);
2684 }
2685
2686 /*
2687  * Print the events from <debugfs_mount_point>/tracing/events
2688  */
2689
2690 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2691                              bool name_only)
2692 {
2693         DIR *sys_dir, *evt_dir;
2694         struct dirent *sys_dirent, *evt_dirent;
2695         char evt_path[MAXPATHLEN];
2696         char *dir_path;
2697         char **evt_list = NULL;
2698         unsigned int evt_i = 0, evt_num = 0;
2699         bool evt_num_known = false;
2700
2701 restart:
2702         sys_dir = tracing_events__opendir();
2703         if (!sys_dir)
2704                 return;
2705
2706         if (evt_num_known) {
2707                 evt_list = zalloc(sizeof(char *) * evt_num);
2708                 if (!evt_list)
2709                         goto out_close_sys_dir;
2710         }
2711
2712         for_each_subsystem(sys_dir, sys_dirent) {
2713                 if (subsys_glob != NULL &&
2714                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2715                         continue;
2716
2717                 dir_path = get_events_file(sys_dirent->d_name);
2718                 if (!dir_path)
2719                         continue;
2720                 evt_dir = opendir(dir_path);
2721                 if (!evt_dir)
2722                         goto next;
2723
2724                 for_each_event(dir_path, evt_dir, evt_dirent) {
2725                         if (event_glob != NULL &&
2726                             !strglobmatch(evt_dirent->d_name, event_glob))
2727                                 continue;
2728
2729                         if (!evt_num_known) {
2730                                 evt_num++;
2731                                 continue;
2732                         }
2733
2734                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2735                                  sys_dirent->d_name, evt_dirent->d_name);
2736
2737                         evt_list[evt_i] = strdup(evt_path);
2738                         if (evt_list[evt_i] == NULL) {
2739                                 put_events_file(dir_path);
2740                                 goto out_close_evt_dir;
2741                         }
2742                         evt_i++;
2743                 }
2744                 closedir(evt_dir);
2745 next:
2746                 put_events_file(dir_path);
2747         }
2748         closedir(sys_dir);
2749
2750         if (!evt_num_known) {
2751                 evt_num_known = true;
2752                 goto restart;
2753         }
2754         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2755         evt_i = 0;
2756         while (evt_i < evt_num) {
2757                 if (name_only) {
2758                         printf("%s ", evt_list[evt_i++]);
2759                         continue;
2760                 }
2761                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2762                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2763         }
2764         if (evt_num && pager_in_use())
2765                 printf("\n");
2766
2767 out_free:
2768         evt_num = evt_i;
2769         for (evt_i = 0; evt_i < evt_num; evt_i++)
2770                 zfree(&evt_list[evt_i]);
2771         zfree(&evt_list);
2772         return;
2773
2774 out_close_evt_dir:
2775         closedir(evt_dir);
2776 out_close_sys_dir:
2777         closedir(sys_dir);
2778
2779         printf("FATAL: not enough memory to print %s\n",
2780                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2781         if (evt_list)
2782                 goto out_free;
2783 }
2784
2785 /*
2786  * Check whether event is in <debugfs_mount_point>/tracing/events
2787  */
2788
2789 int is_valid_tracepoint(const char *event_string)
2790 {
2791         DIR *sys_dir, *evt_dir;
2792         struct dirent *sys_dirent, *evt_dirent;
2793         char evt_path[MAXPATHLEN];
2794         char *dir_path;
2795
2796         sys_dir = tracing_events__opendir();
2797         if (!sys_dir)
2798                 return 0;
2799
2800         for_each_subsystem(sys_dir, sys_dirent) {
2801                 dir_path = get_events_file(sys_dirent->d_name);
2802                 if (!dir_path)
2803                         continue;
2804                 evt_dir = opendir(dir_path);
2805                 if (!evt_dir)
2806                         goto next;
2807
2808                 for_each_event(dir_path, evt_dir, evt_dirent) {
2809                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2810                                  sys_dirent->d_name, evt_dirent->d_name);
2811                         if (!strcmp(evt_path, event_string)) {
2812                                 closedir(evt_dir);
2813                                 closedir(sys_dir);
2814                                 return 1;
2815                         }
2816                 }
2817                 closedir(evt_dir);
2818 next:
2819                 put_events_file(dir_path);
2820         }
2821         closedir(sys_dir);
2822         return 0;
2823 }
2824
2825 static bool is_event_supported(u8 type, u64 config)
2826 {
2827         bool ret = true;
2828         int open_return;
2829         struct evsel *evsel;
2830         struct perf_event_attr attr = {
2831                 .type = type,
2832                 .config = config,
2833                 .disabled = 1,
2834         };
2835         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2836
2837         if (tmap == NULL)
2838                 return false;
2839
2840         evsel = evsel__new(&attr);
2841         if (evsel) {
2842                 open_return = evsel__open(evsel, NULL, tmap);
2843                 ret = open_return >= 0;
2844
2845                 if (open_return == -EACCES) {
2846                         /*
2847                          * This happens if the paranoid value
2848                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2849                          * Re-run with exclude_kernel set; we don't do that
2850                          * by default as some ARM machines do not support it.
2851                          *
2852                          */
2853                         evsel->core.attr.exclude_kernel = 1;
2854                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2855                 }
2856                 evsel__delete(evsel);
2857         }
2858
2859         perf_thread_map__put(tmap);
2860         return ret;
2861 }
2862
2863 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2864                       bool name_only)
2865 {
2866         struct probe_cache *pcache;
2867         struct probe_cache_entry *ent;
2868         struct strlist *bidlist, *sdtlist;
2869         struct strlist_config cfg = {.dont_dupstr = true};
2870         struct str_node *nd, *nd2;
2871         char *buf, *path, *ptr = NULL;
2872         bool show_detail = false;
2873         int ret;
2874
2875         sdtlist = strlist__new(NULL, &cfg);
2876         if (!sdtlist) {
2877                 pr_debug("Failed to allocate new strlist for SDT\n");
2878                 return;
2879         }
2880         bidlist = build_id_cache__list_all(true);
2881         if (!bidlist) {
2882                 pr_debug("Failed to get buildids: %d\n", errno);
2883                 return;
2884         }
2885         strlist__for_each_entry(nd, bidlist) {
2886                 pcache = probe_cache__new(nd->s, NULL);
2887                 if (!pcache)
2888                         continue;
2889                 list_for_each_entry(ent, &pcache->entries, node) {
2890                         if (!ent->sdt)
2891                                 continue;
2892                         if (subsys_glob &&
2893                             !strglobmatch(ent->pev.group, subsys_glob))
2894                                 continue;
2895                         if (event_glob &&
2896                             !strglobmatch(ent->pev.event, event_glob))
2897                                 continue;
2898                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2899                                         ent->pev.event, nd->s);
2900                         if (ret > 0)
2901                                 strlist__add(sdtlist, buf);
2902                 }
2903                 probe_cache__delete(pcache);
2904         }
2905         strlist__delete(bidlist);
2906
2907         strlist__for_each_entry(nd, sdtlist) {
2908                 buf = strchr(nd->s, '@');
2909                 if (buf)
2910                         *(buf++) = '\0';
2911                 if (name_only) {
2912                         printf("%s ", nd->s);
2913                         continue;
2914                 }
2915                 nd2 = strlist__next(nd);
2916                 if (nd2) {
2917                         ptr = strchr(nd2->s, '@');
2918                         if (ptr)
2919                                 *ptr = '\0';
2920                         if (strcmp(nd->s, nd2->s) == 0)
2921                                 show_detail = true;
2922                 }
2923                 if (show_detail) {
2924                         path = build_id_cache__origname(buf);
2925                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2926                         if (ret > 0) {
2927                                 printf("  %-50s [%s]\n", buf, "SDT event");
2928                                 free(buf);
2929                         }
2930                         free(path);
2931                 } else
2932                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2933                 if (nd2) {
2934                         if (strcmp(nd->s, nd2->s) != 0)
2935                                 show_detail = false;
2936                         if (ptr)
2937                                 *ptr = '@';
2938                 }
2939         }
2940         strlist__delete(sdtlist);
2941 }
2942
2943 int print_hwcache_events(const char *event_glob, bool name_only)
2944 {
2945         unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0;
2946         char name[64], new_name[128];
2947         char **evt_list = NULL, **evt_pmus = NULL;
2948         bool evt_num_known = false;
2949         struct perf_pmu *pmu = NULL;
2950
2951         if (perf_pmu__has_hybrid()) {
2952                 npmus = perf_pmu__hybrid_pmu_num();
2953                 evt_pmus = zalloc(sizeof(char *) * npmus);
2954                 if (!evt_pmus)
2955                         goto out_enomem;
2956         }
2957
2958 restart:
2959         if (evt_num_known) {
2960                 evt_list = zalloc(sizeof(char *) * evt_num);
2961                 if (!evt_list)
2962                         goto out_enomem;
2963         }
2964
2965         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2966                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2967                         /* skip invalid cache type */
2968                         if (!evsel__is_cache_op_valid(type, op))
2969                                 continue;
2970
2971                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2972                                 unsigned int hybrid_supported = 0, j;
2973                                 bool supported;
2974
2975                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2976                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2977                                         continue;
2978
2979                                 if (!perf_pmu__has_hybrid()) {
2980                                         if (!is_event_supported(PERF_TYPE_HW_CACHE,
2981                                                                 type | (op << 8) | (i << 16))) {
2982                                                 continue;
2983                                         }
2984                                 } else {
2985                                         perf_pmu__for_each_hybrid_pmu(pmu) {
2986                                                 if (!evt_num_known) {
2987                                                         evt_num++;
2988                                                         continue;
2989                                                 }
2990
2991                                                 supported = is_event_supported(
2992                                                                         PERF_TYPE_HW_CACHE,
2993                                                                         type | (op << 8) | (i << 16) |
2994                                                                         ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
2995                                                 if (supported) {
2996                                                         snprintf(new_name, sizeof(new_name), "%s/%s/",
2997                                                                  pmu->name, name);
2998                                                         evt_pmus[hybrid_supported] = strdup(new_name);
2999                                                         hybrid_supported++;
3000                                                 }
3001                                         }
3002
3003                                         if (hybrid_supported == 0)
3004                                                 continue;
3005                                 }
3006
3007                                 if (!evt_num_known) {
3008                                         evt_num++;
3009                                         continue;
3010                                 }
3011
3012                                 if ((hybrid_supported == 0) ||
3013                                     (hybrid_supported == npmus)) {
3014                                         evt_list[evt_i] = strdup(name);
3015                                         if (npmus > 0) {
3016                                                 for (j = 0; j < npmus; j++)
3017                                                         zfree(&evt_pmus[j]);
3018                                         }
3019                                 } else {
3020                                         for (j = 0; j < hybrid_supported; j++) {
3021                                                 evt_list[evt_i++] = evt_pmus[j];
3022                                                 evt_pmus[j] = NULL;
3023                                         }
3024                                         continue;
3025                                 }
3026
3027                                 if (evt_list[evt_i] == NULL)
3028                                         goto out_enomem;
3029                                 evt_i++;
3030                         }
3031                 }
3032         }
3033
3034         if (!evt_num_known) {
3035                 evt_num_known = true;
3036                 goto restart;
3037         }
3038
3039         for (evt_i = 0; evt_i < evt_num; evt_i++) {
3040                 if (!evt_list[evt_i])
3041                         break;
3042         }
3043
3044         evt_num = evt_i;
3045         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
3046         evt_i = 0;
3047         while (evt_i < evt_num) {
3048                 if (name_only) {
3049                         printf("%s ", evt_list[evt_i++]);
3050                         continue;
3051                 }
3052                 printf("  %-50s [%s]\n", evt_list[evt_i++],
3053                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
3054         }
3055         if (evt_num && pager_in_use())
3056                 printf("\n");
3057
3058 out_free:
3059         evt_num = evt_i;
3060         for (evt_i = 0; evt_i < evt_num; evt_i++)
3061                 zfree(&evt_list[evt_i]);
3062         zfree(&evt_list);
3063
3064         for (evt_i = 0; evt_i < npmus; evt_i++)
3065                 zfree(&evt_pmus[evt_i]);
3066         zfree(&evt_pmus);
3067         return evt_num;
3068
3069 out_enomem:
3070         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
3071         if (evt_list)
3072                 goto out_free;
3073         return evt_num;
3074 }
3075
3076 static void print_tool_event(const struct event_symbol *syms, const char *event_glob,
3077                              bool name_only)
3078 {
3079         if (syms->symbol == NULL)
3080                 return;
3081
3082         if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
3083               (syms->alias && strglobmatch(syms->alias, event_glob))))
3084                 return;
3085
3086         if (name_only)
3087                 printf("%s ", syms->symbol);
3088         else {
3089                 char name[MAX_NAME_LEN];
3090                 if (syms->alias && strlen(syms->alias))
3091                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
3092                 else
3093                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
3094                 printf("  %-50s [%s]\n", name, "Tool event");
3095         }
3096 }
3097
3098 void print_tool_events(const char *event_glob, bool name_only)
3099 {
3100         // Start at 1 because the first enum entry symbols no tool event
3101         for (int i = 1; i < PERF_TOOL_MAX; ++i) {
3102                 print_tool_event(event_symbols_tool + i, event_glob, name_only);
3103         }
3104         if (pager_in_use())
3105                 printf("\n");
3106 }
3107
3108 void print_symbol_events(const char *event_glob, unsigned type,
3109                                 struct event_symbol *syms, unsigned max,
3110                                 bool name_only)
3111 {
3112         unsigned int i, evt_i = 0, evt_num = 0;
3113         char name[MAX_NAME_LEN];
3114         char **evt_list = NULL;
3115         bool evt_num_known = false;
3116
3117 restart:
3118         if (evt_num_known) {
3119                 evt_list = zalloc(sizeof(char *) * evt_num);
3120                 if (!evt_list)
3121                         goto out_enomem;
3122                 syms -= max;
3123         }
3124
3125         for (i = 0; i < max; i++, syms++) {
3126                 /*
3127                  * New attr.config still not supported here, the latest
3128                  * example was PERF_COUNT_SW_CGROUP_SWITCHES
3129                  */
3130                 if (syms->symbol == NULL)
3131                         continue;
3132
3133                 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
3134                       (syms->alias && strglobmatch(syms->alias, event_glob))))
3135                         continue;
3136
3137                 if (!is_event_supported(type, i))
3138                         continue;
3139
3140                 if (!evt_num_known) {
3141                         evt_num++;
3142                         continue;
3143                 }
3144
3145                 if (!name_only && strlen(syms->alias))
3146                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
3147                 else
3148                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
3149
3150                 evt_list[evt_i] = strdup(name);
3151                 if (evt_list[evt_i] == NULL)
3152                         goto out_enomem;
3153                 evt_i++;
3154         }
3155
3156         if (!evt_num_known) {
3157                 evt_num_known = true;
3158                 goto restart;
3159         }
3160         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
3161         evt_i = 0;
3162         while (evt_i < evt_num) {
3163                 if (name_only) {
3164                         printf("%s ", evt_list[evt_i++]);
3165                         continue;
3166                 }
3167                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
3168         }
3169         if (evt_num && pager_in_use())
3170                 printf("\n");
3171
3172 out_free:
3173         evt_num = evt_i;
3174         for (evt_i = 0; evt_i < evt_num; evt_i++)
3175                 zfree(&evt_list[evt_i]);
3176         zfree(&evt_list);
3177         return;
3178
3179 out_enomem:
3180         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
3181         if (evt_list)
3182                 goto out_free;
3183 }
3184
3185 /*
3186  * Print the help text for the event symbols:
3187  */
3188 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
3189                         bool long_desc, bool details_flag, bool deprecated,
3190                         const char *pmu_name)
3191 {
3192         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
3193                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
3194
3195         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
3196                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
3197         print_tool_events(event_glob, name_only);
3198
3199         print_hwcache_events(event_glob, name_only);
3200
3201         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
3202                         details_flag, deprecated, pmu_name);
3203
3204         if (event_glob != NULL)
3205                 return;
3206
3207         if (!name_only) {
3208                 printf("  %-50s [%s]\n",
3209                        "rNNN",
3210                        event_type_descriptors[PERF_TYPE_RAW]);
3211                 printf("  %-50s [%s]\n",
3212                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
3213                        event_type_descriptors[PERF_TYPE_RAW]);
3214                 if (pager_in_use())
3215                         printf("   (see 'man perf-list' on how to encode it)\n\n");
3216
3217                 printf("  %-50s [%s]\n",
3218                        "mem:<addr>[/len][:access]",
3219                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
3220                 if (pager_in_use())
3221                         printf("\n");
3222         }
3223
3224         print_tracepoint_events(NULL, NULL, name_only);
3225
3226         print_sdt_events(NULL, NULL, name_only);
3227
3228         metricgroup__print(true, true, NULL, name_only, details_flag,
3229                            pmu_name);
3230
3231         print_libpfm_events(name_only, long_desc);
3232 }
3233
3234 int parse_events__is_hardcoded_term(struct parse_events_term *term)
3235 {
3236         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
3237 }
3238
3239 static int new_term(struct parse_events_term **_term,
3240                     struct parse_events_term *temp,
3241                     char *str, u64 num)
3242 {
3243         struct parse_events_term *term;
3244
3245         term = malloc(sizeof(*term));
3246         if (!term)
3247                 return -ENOMEM;
3248
3249         *term = *temp;
3250         INIT_LIST_HEAD(&term->list);
3251         term->weak = false;
3252
3253         switch (term->type_val) {
3254         case PARSE_EVENTS__TERM_TYPE_NUM:
3255                 term->val.num = num;
3256                 break;
3257         case PARSE_EVENTS__TERM_TYPE_STR:
3258                 term->val.str = str;
3259                 break;
3260         default:
3261                 free(term);
3262                 return -EINVAL;
3263         }
3264
3265         *_term = term;
3266         return 0;
3267 }
3268
3269 int parse_events_term__num(struct parse_events_term **term,
3270                            int type_term, char *config, u64 num,
3271                            bool no_value,
3272                            void *loc_term_, void *loc_val_)
3273 {
3274         YYLTYPE *loc_term = loc_term_;
3275         YYLTYPE *loc_val = loc_val_;
3276
3277         struct parse_events_term temp = {
3278                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
3279                 .type_term = type_term,
3280                 .config    = config ? : strdup(config_term_names[type_term]),
3281                 .no_value  = no_value,
3282                 .err_term  = loc_term ? loc_term->first_column : 0,
3283                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3284         };
3285
3286         return new_term(term, &temp, NULL, num);
3287 }
3288
3289 int parse_events_term__str(struct parse_events_term **term,
3290                            int type_term, char *config, char *str,
3291                            void *loc_term_, void *loc_val_)
3292 {
3293         YYLTYPE *loc_term = loc_term_;
3294         YYLTYPE *loc_val = loc_val_;
3295
3296         struct parse_events_term temp = {
3297                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3298                 .type_term = type_term,
3299                 .config    = config,
3300                 .err_term  = loc_term ? loc_term->first_column : 0,
3301                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3302         };
3303
3304         return new_term(term, &temp, str, 0);
3305 }
3306
3307 int parse_events_term__sym_hw(struct parse_events_term **term,
3308                               char *config, unsigned idx)
3309 {
3310         struct event_symbol *sym;
3311         char *str;
3312         struct parse_events_term temp = {
3313                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3314                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3315                 .config    = config,
3316         };
3317
3318         if (!temp.config) {
3319                 temp.config = strdup("event");
3320                 if (!temp.config)
3321                         return -ENOMEM;
3322         }
3323         BUG_ON(idx >= PERF_COUNT_HW_MAX);
3324         sym = &event_symbols_hw[idx];
3325
3326         str = strdup(sym->symbol);
3327         if (!str)
3328                 return -ENOMEM;
3329         return new_term(term, &temp, str, 0);
3330 }
3331
3332 int parse_events_term__clone(struct parse_events_term **new,
3333                              struct parse_events_term *term)
3334 {
3335         char *str;
3336         struct parse_events_term temp = {
3337                 .type_val  = term->type_val,
3338                 .type_term = term->type_term,
3339                 .config    = NULL,
3340                 .err_term  = term->err_term,
3341                 .err_val   = term->err_val,
3342         };
3343
3344         if (term->config) {
3345                 temp.config = strdup(term->config);
3346                 if (!temp.config)
3347                         return -ENOMEM;
3348         }
3349         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3350                 return new_term(new, &temp, NULL, term->val.num);
3351
3352         str = strdup(term->val.str);
3353         if (!str)
3354                 return -ENOMEM;
3355         return new_term(new, &temp, str, 0);
3356 }
3357
3358 void parse_events_term__delete(struct parse_events_term *term)
3359 {
3360         if (term->array.nr_ranges)
3361                 zfree(&term->array.ranges);
3362
3363         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3364                 zfree(&term->val.str);
3365
3366         zfree(&term->config);
3367         free(term);
3368 }
3369
3370 int parse_events_copy_term_list(struct list_head *old,
3371                                  struct list_head **new)
3372 {
3373         struct parse_events_term *term, *n;
3374         int ret;
3375
3376         if (!old) {
3377                 *new = NULL;
3378                 return 0;
3379         }
3380
3381         *new = malloc(sizeof(struct list_head));
3382         if (!*new)
3383                 return -ENOMEM;
3384         INIT_LIST_HEAD(*new);
3385
3386         list_for_each_entry (term, old, list) {
3387                 ret = parse_events_term__clone(&n, term);
3388                 if (ret)
3389                         return ret;
3390                 list_add_tail(&n->list, *new);
3391         }
3392         return 0;
3393 }
3394
3395 void parse_events_terms__purge(struct list_head *terms)
3396 {
3397         struct parse_events_term *term, *h;
3398
3399         list_for_each_entry_safe(term, h, terms, list) {
3400                 list_del_init(&term->list);
3401                 parse_events_term__delete(term);
3402         }
3403 }
3404
3405 void parse_events_terms__delete(struct list_head *terms)
3406 {
3407         if (!terms)
3408                 return;
3409         parse_events_terms__purge(terms);
3410         free(terms);
3411 }
3412
3413 void parse_events__clear_array(struct parse_events_array *a)
3414 {
3415         zfree(&a->ranges);
3416 }
3417
3418 void parse_events_evlist_error(struct parse_events_state *parse_state,
3419                                int idx, const char *str)
3420 {
3421         if (!parse_state->error)
3422                 return;
3423
3424         parse_events_error__handle(parse_state->error, idx, strdup(str), NULL);
3425 }
3426
3427 static void config_terms_list(char *buf, size_t buf_sz)
3428 {
3429         int i;
3430         bool first = true;
3431
3432         buf[0] = '\0';
3433         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3434                 const char *name = config_term_names[i];
3435
3436                 if (!config_term_avail(i, NULL))
3437                         continue;
3438                 if (!name)
3439                         continue;
3440                 if (name[0] == '<')
3441                         continue;
3442
3443                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3444                         return;
3445
3446                 if (!first)
3447                         strcat(buf, ",");
3448                 else
3449                         first = false;
3450                 strcat(buf, name);
3451         }
3452 }
3453
3454 /*
3455  * Return string contains valid config terms of an event.
3456  * @additional_terms: For terms such as PMU sysfs terms.
3457  */
3458 char *parse_events_formats_error_string(char *additional_terms)
3459 {
3460         char *str;
3461         /* "no-overwrite" is the longest name */
3462         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3463                           (sizeof("no-overwrite") - 1)];
3464
3465         config_terms_list(static_terms, sizeof(static_terms));
3466         /* valid terms */
3467         if (additional_terms) {
3468                 if (asprintf(&str, "valid terms: %s,%s",
3469                              additional_terms, static_terms) < 0)
3470                         goto fail;
3471         } else {
3472                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3473                         goto fail;
3474         }
3475         return str;
3476
3477 fail:
3478         return NULL;
3479 }
3480
3481 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx,
3482                                              struct perf_event_attr *attr,
3483                                              const char *name,
3484                                              const char *metric_id,
3485                                              struct perf_pmu *pmu,
3486                                              struct list_head *config_terms)
3487 {
3488         return __add_event(list, idx, attr, /*init_attr=*/true, name, metric_id,
3489                            pmu, config_terms, /*auto_merge_stats=*/false,
3490                            /*cpu_list=*/NULL);
3491 }