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