tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE void*
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "probe-file.h"
  34 #include "asm/bug.h"
  35 #include "util/parse-branch-options.h"
  36 #include "metricgroup.h"
  37 #include "util/evsel_config.h"
  38 #include "util/event.h"
  39 #include "util/pfm.h"
  40
  41 #define MAX_NAME_LEN 100
  42
  43 #ifdef PARSER_DEBUG
  44 extern int parse_events_debug;
  45 #endif
  46 int parse_events_parse(void *parse_state, void *scanner);
  47 static int get_config_terms(struct list_head *head_config,
  48                             struct list_head *head_terms __maybe_unused);
  49
  50 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  51 /*
  52  * The variable indicates the number of supported pmu event symbols.
  53  * 0 means not initialized and ready to init
  54  * -1 means failed to init, don't try anymore
  55  * >0 is the number of supported pmu event symbols
  56  */
  57 static int perf_pmu_events_list_num;
  58
  59 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  60         [PERF_COUNT_HW_CPU_CYCLES] = {
  61                 .symbol = "cpu-cycles",
  62                 .alias  = "cycles",
  63         },
  64         [PERF_COUNT_HW_INSTRUCTIONS] = {
  65                 .symbol = "instructions",
  66                 .alias  = "",
  67         },
  68         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  69                 .symbol = "cache-references",
  70                 .alias  = "",
  71         },
  72         [PERF_COUNT_HW_CACHE_MISSES] = {
  73                 .symbol = "cache-misses",
  74                 .alias  = "",
  75         },
  76         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  77                 .symbol = "branch-instructions",
  78                 .alias  = "branches",
  79         },
  80         [PERF_COUNT_HW_BRANCH_MISSES] = {
  81                 .symbol = "branch-misses",
  82                 .alias  = "",
  83         },
  84         [PERF_COUNT_HW_BUS_CYCLES] = {
  85                 .symbol = "bus-cycles",
  86                 .alias  = "",
  87         },
  88         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  89                 .symbol = "stalled-cycles-frontend",
  90                 .alias  = "idle-cycles-frontend",
  91         },
  92         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  93                 .symbol = "stalled-cycles-backend",
  94                 .alias  = "idle-cycles-backend",
  95         },
  96         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  97                 .symbol = "ref-cycles",
  98                 .alias  = "",
  99         },
 100 };
 101
 102 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 103         [PERF_COUNT_SW_CPU_CLOCK] = {
 104                 .symbol = "cpu-clock",
 105                 .alias  = "",
 106         },
 107         [PERF_COUNT_SW_TASK_CLOCK] = {
 108                 .symbol = "task-clock",
 109                 .alias  = "",
 110         },
 111         [PERF_COUNT_SW_PAGE_FAULTS] = {
 112                 .symbol = "page-faults",
 113                 .alias  = "faults",
 114         },
 115         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 116                 .symbol = "context-switches",
 117                 .alias  = "cs",
 118         },
 119         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 120                 .symbol = "cpu-migrations",
 121                 .alias  = "migrations",
 122         },
 123         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 124                 .symbol = "minor-faults",
 125                 .alias  = "",
 126         },
 127         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 128                 .symbol = "major-faults",
 129                 .alias  = "",
 130         },
 131         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 132                 .symbol = "alignment-faults",
 133                 .alias  = "",
 134         },
 135         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 136                 .symbol = "emulation-faults",
 137                 .alias  = "",
 138         },
 139         [PERF_COUNT_SW_DUMMY] = {
 140                 .symbol = "dummy",
 141                 .alias  = "",
 142         },
 143         [PERF_COUNT_SW_BPF_OUTPUT] = {
 144                 .symbol = "bpf-output",
 145                 .alias  = "",
 146         },
 147 };
 148
 149 #define __PERF_EVENT_FIELD(config, name) \
 150         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 151
 152 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 153 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 154 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 155 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 156
 157 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 158         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 159                 if (sys_dirent->d_type == DT_DIR &&             \
 160                     (strcmp(sys_dirent->d_name, ".")) &&        \
 161                     (strcmp(sys_dirent->d_name, "..")))
 162
 163 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 164 {
 165         char evt_path[MAXPATHLEN];
 166         int fd;
 167
 168         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 169         fd = open(evt_path, O_RDONLY);
 170         if (fd < 0)
 171                 return -EINVAL;
 172         close(fd);
 173
 174         return 0;
 175 }
 176
 177 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 178         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 179                 if (evt_dirent->d_type == DT_DIR &&             \
 180                     (strcmp(evt_dirent->d_name, ".")) &&        \
 181                     (strcmp(evt_dirent->d_name, "..")) &&       \
 182                     (!tp_event_has_id(dir_path, evt_dirent)))
 183
 184 #define MAX_EVENT_LENGTH 512
 185
 186 void parse_events__handle_error(struct parse_events_error *err, int idx,
 187                                 char *str, char *help)
 188 {
 189         if (WARN(!str, "WARNING: failed to provide error string\n")) {
 190                 free(help);
 191                 return;
 192         }
 193         switch (err->num_errors) {
 194         case 0:
 195                 err->idx = idx;
 196                 err->str = str;
 197                 err->help = help;
 198                 break;
 199         case 1:
 200                 err->first_idx = err->idx;
 201                 err->idx = idx;
 202                 err->first_str = err->str;
 203                 err->str = str;
 204                 err->first_help = err->help;
 205                 err->help = help;
 206                 break;
 207         default:
 208                 pr_debug("Multiple errors dropping message: %s (%s)\n",
 209                         err->str, err->help);
 210                 free(err->str);
 211                 err->str = str;
 212                 free(err->help);
 213                 err->help = help;
 214                 break;
 215         }
 216         err->num_errors++;
 217 }
 218
 219 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 220 {
 221         struct tracepoint_path *path = NULL;
 222         DIR *sys_dir, *evt_dir;
 223         struct dirent *sys_dirent, *evt_dirent;
 224         char id_buf[24];
 225         int fd;
 226         u64 id;
 227         char evt_path[MAXPATHLEN];
 228         char *dir_path;
 229
 230         sys_dir = tracing_events__opendir();
 231         if (!sys_dir)
 232                 return NULL;
 233
 234         for_each_subsystem(sys_dir, sys_dirent) {
 235                 dir_path = get_events_file(sys_dirent->d_name);
 236                 if (!dir_path)
 237                         continue;
 238                 evt_dir = opendir(dir_path);
 239                 if (!evt_dir)
 240                         goto next;
 241
 242                 for_each_event(dir_path, evt_dir, evt_dirent) {
 243
 244                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 245                                   evt_dirent->d_name);
 246                         fd = open(evt_path, O_RDONLY);
 247                         if (fd < 0)
 248                                 continue;
 249                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 250                                 close(fd);
 251                                 continue;
 252                         }
 253                         close(fd);
 254                         id = atoll(id_buf);
 255                         if (id == config) {
 256                                 put_events_file(dir_path);
 257                                 closedir(evt_dir);
 258                                 closedir(sys_dir);
 259                                 path = zalloc(sizeof(*path));
 260                                 if (!path)
 261                                         return NULL;
 262                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 263                                         free(path);
 264                                         return NULL;
 265                                 }
 266                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 267                                         zfree(&path->system);
 268                                         free(path);
 269                                         return NULL;
 270                                 }
 271                                 return path;
 272                         }
 273                 }
 274                 closedir(evt_dir);
 275 next:
 276                 put_events_file(dir_path);
 277         }
 278
 279         closedir(sys_dir);
 280         return NULL;
 281 }
 282
 283 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 284 {
 285         struct tracepoint_path *path = zalloc(sizeof(*path));
 286         char *str = strchr(name, ':');
 287
 288         if (path == NULL || str == NULL) {
 289                 free(path);
 290                 return NULL;
 291         }
 292
 293         path->system = strndup(name, str - name);
 294         path->name = strdup(str+1);
 295
 296         if (path->system == NULL || path->name == NULL) {
 297                 zfree(&path->system);
 298                 zfree(&path->name);
 299                 zfree(&path);
 300         }
 301
 302         return path;
 303 }
 304
 305 const char *event_type(int type)
 306 {
 307         switch (type) {
 308         case PERF_TYPE_HARDWARE:
 309                 return "hardware";
 310
 311         case PERF_TYPE_SOFTWARE:
 312                 return "software";
 313
 314         case PERF_TYPE_TRACEPOINT:
 315                 return "tracepoint";
 316
 317         case PERF_TYPE_HW_CACHE:
 318                 return "hardware-cache";
 319
 320         default:
 321                 break;
 322         }
 323
 324         return "unknown";
 325 }
 326
 327 static int parse_events__is_name_term(struct parse_events_term *term)
 328 {
 329         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 330 }
 331
 332 static char *get_config_name(struct list_head *head_terms)
 333 {
 334         struct parse_events_term *term;
 335
 336         if (!head_terms)
 337                 return NULL;
 338
 339         list_for_each_entry(term, head_terms, list)
 340                 if (parse_events__is_name_term(term))
 341                         return term->val.str;
 342
 343         return NULL;
 344 }
 345
 346 static struct evsel *
 347 __add_event(struct list_head *list, int *idx,
 348             struct perf_event_attr *attr,
 349             bool init_attr,
 350             char *name, struct perf_pmu *pmu,
 351             struct list_head *config_terms, bool auto_merge_stats,
 352             const char *cpu_list)
 353 {
 354         struct evsel *evsel;
 355         struct perf_cpu_map *cpus = pmu ? pmu->cpus :
 356                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 357
 358         if (init_attr)
 359                 event_attr_init(attr);
 360
 361         evsel = evsel__new_idx(attr, *idx);
 362         if (!evsel)
 363                 return NULL;
 364
 365         (*idx)++;
 366         evsel->core.cpus   = perf_cpu_map__get(cpus);
 367         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 368         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 369         evsel->auto_merge_stats = auto_merge_stats;
 370
 371         if (name)
 372                 evsel->name = strdup(name);
 373
 374         if (config_terms)
 375                 list_splice(config_terms, &evsel->config_terms);
 376
 377         if (list)
 378                 list_add_tail(&evsel->core.node, list);
 379
 380         return evsel;
 381 }
 382
 383 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
 384                                         char *name, struct perf_pmu *pmu)
 385 {
 386         return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
 387                            NULL);
 388 }
 389
 390 static int add_event(struct list_head *list, int *idx,
 391                      struct perf_event_attr *attr, char *name,
 392                      struct list_head *config_terms)
 393 {
 394         return __add_event(list, idx, attr, true, name, NULL, config_terms,
 395                            false, NULL) ? 0 : -ENOMEM;
 396 }
 397
 398 static int add_event_tool(struct list_head *list, int *idx,
 399                           enum perf_tool_event tool_event)
 400 {
 401         struct evsel *evsel;
 402         struct perf_event_attr attr = {
 403                 .type = PERF_TYPE_SOFTWARE,
 404                 .config = PERF_COUNT_SW_DUMMY,
 405         };
 406
 407         evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
 408                             "0");
 409         if (!evsel)
 410                 return -ENOMEM;
 411         evsel->tool_event = tool_event;
 412         if (tool_event == PERF_TOOL_DURATION_TIME)
 413                 evsel->unit = strdup("ns");
 414         return 0;
 415 }
 416
 417 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
 418 {
 419         int i, j;
 420         int n, longest = -1;
 421
 422         for (i = 0; i < size; i++) {
 423                 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
 424                         n = strlen(names[i][j]);
 425                         if (n > longest && !strncasecmp(str, names[i][j], n))
 426                                 longest = n;
 427                 }
 428                 if (longest > 0)
 429                         return i;
 430         }
 431
 432         return -1;
 433 }
 434
 435 typedef int config_term_func_t(struct perf_event_attr *attr,
 436                                struct parse_events_term *term,
 437                                struct parse_events_error *err);
 438 static int config_term_common(struct perf_event_attr *attr,
 439                               struct parse_events_term *term,
 440                               struct parse_events_error *err);
 441 static int config_attr(struct perf_event_attr *attr,
 442                        struct list_head *head,
 443                        struct parse_events_error *err,
 444                        config_term_func_t config_term);
 445
 446 int parse_events_add_cache(struct list_head *list, int *idx,
 447                            char *type, char *op_result1, char *op_result2,
 448                            struct parse_events_error *err,
 449                            struct list_head *head_config)
 450 {
 451         struct perf_event_attr attr;
 452         LIST_HEAD(config_terms);
 453         char name[MAX_NAME_LEN], *config_name;
 454         int cache_type = -1, cache_op = -1, cache_result = -1;
 455         char *op_result[2] = { op_result1, op_result2 };
 456         int i, n;
 457
 458         /*
 459          * No fallback - if we cannot get a clear cache type
 460          * then bail out:
 461          */
 462         cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 463         if (cache_type == -1)
 464                 return -EINVAL;
 465
 466         config_name = get_config_name(head_config);
 467         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 468
 469         for (i = 0; (i < 2) && (op_result[i]); i++) {
 470                 char *str = op_result[i];
 471
 472                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 473
 474                 if (cache_op == -1) {
 475                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 476                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 477                         if (cache_op >= 0) {
 478                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 479                                         return -EINVAL;
 480                                 continue;
 481                         }
 482                 }
 483
 484                 if (cache_result == -1) {
 485                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 486                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 487                         if (cache_result >= 0)
 488                                 continue;
 489                 }
 490         }
 491
 492         /*
 493          * Fall back to reads:
 494          */
 495         if (cache_op == -1)
 496                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 497
 498         /*
 499          * Fall back to accesses:
 500          */
 501         if (cache_result == -1)
 502                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 503
 504         memset(&attr, 0, sizeof(attr));
 505         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 506         attr.type = PERF_TYPE_HW_CACHE;
 507
 508         if (head_config) {
 509                 if (config_attr(&attr, head_config, err,
 510                                 config_term_common))
 511                         return -EINVAL;
 512
 513                 if (get_config_terms(head_config, &config_terms))
 514                         return -ENOMEM;
 515         }
 516         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 517 }
 518
 519 static void tracepoint_error(struct parse_events_error *e, int err,
 520                              const char *sys, const char *name)
 521 {
 522         const char *str;
 523         char help[BUFSIZ];
 524
 525         if (!e)
 526                 return;
 527
 528         /*
 529          * We get error directly from syscall errno ( > 0),
 530          * or from encoded pointer's error ( < 0).
 531          */
 532         err = abs(err);
 533
 534         switch (err) {
 535         case EACCES:
 536                 str = "can't access trace events";
 537                 break;
 538         case ENOENT:
 539                 str = "unknown tracepoint";
 540                 break;
 541         default:
 542                 str = "failed to add tracepoint";
 543                 break;
 544         }
 545
 546         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 547         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 548 }
 549
 550 static int add_tracepoint(struct list_head *list, int *idx,
 551                           const char *sys_name, const char *evt_name,
 552                           struct parse_events_error *err,
 553                           struct list_head *head_config)
 554 {
 555         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 556
 557         if (IS_ERR(evsel)) {
 558                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 559                 return PTR_ERR(evsel);
 560         }
 561
 562         if (head_config) {
 563                 LIST_HEAD(config_terms);
 564
 565                 if (get_config_terms(head_config, &config_terms))
 566                         return -ENOMEM;
 567                 list_splice(&config_terms, &evsel->config_terms);
 568         }
 569
 570         list_add_tail(&evsel->core.node, list);
 571         return 0;
 572 }
 573
 574 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 575                                       const char *sys_name, const char *evt_name,
 576                                       struct parse_events_error *err,
 577                                       struct list_head *head_config)
 578 {
 579         char *evt_path;
 580         struct dirent *evt_ent;
 581         DIR *evt_dir;
 582         int ret = 0, found = 0;
 583
 584         evt_path = get_events_file(sys_name);
 585         if (!evt_path) {
 586                 tracepoint_error(err, errno, sys_name, evt_name);
 587                 return -1;
 588         }
 589         evt_dir = opendir(evt_path);
 590         if (!evt_dir) {
 591                 put_events_file(evt_path);
 592                 tracepoint_error(err, errno, sys_name, evt_name);
 593                 return -1;
 594         }
 595
 596         while (!ret && (evt_ent = readdir(evt_dir))) {
 597                 if (!strcmp(evt_ent->d_name, ".")
 598                     || !strcmp(evt_ent->d_name, "..")
 599                     || !strcmp(evt_ent->d_name, "enable")
 600                     || !strcmp(evt_ent->d_name, "filter"))
 601                         continue;
 602
 603                 if (!strglobmatch(evt_ent->d_name, evt_name))
 604                         continue;
 605
 606                 found++;
 607
 608                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 609                                      err, head_config);
 610         }
 611
 612         if (!found) {
 613                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 614                 ret = -1;
 615         }
 616
 617         put_events_file(evt_path);
 618         closedir(evt_dir);
 619         return ret;
 620 }
 621
 622 static int add_tracepoint_event(struct list_head *list, int *idx,
 623                                 const char *sys_name, const char *evt_name,
 624                                 struct parse_events_error *err,
 625                                 struct list_head *head_config)
 626 {
 627         return strpbrk(evt_name, "*?") ?
 628                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 629                                           err, head_config) :
 630                add_tracepoint(list, idx, sys_name, evt_name,
 631                               err, head_config);
 632 }
 633
 634 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 635                                     const char *sys_name, const char *evt_name,
 636                                     struct parse_events_error *err,
 637                                     struct list_head *head_config)
 638 {
 639         struct dirent *events_ent;
 640         DIR *events_dir;
 641         int ret = 0;
 642
 643         events_dir = tracing_events__opendir();
 644         if (!events_dir) {
 645                 tracepoint_error(err, errno, sys_name, evt_name);
 646                 return -1;
 647         }
 648
 649         while (!ret && (events_ent = readdir(events_dir))) {
 650                 if (!strcmp(events_ent->d_name, ".")
 651                     || !strcmp(events_ent->d_name, "..")
 652                     || !strcmp(events_ent->d_name, "enable")
 653                     || !strcmp(events_ent->d_name, "header_event")
 654                     || !strcmp(events_ent->d_name, "header_page"))
 655                         continue;
 656
 657                 if (!strglobmatch(events_ent->d_name, sys_name))
 658                         continue;
 659
 660                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 661                                            evt_name, err, head_config);
 662         }
 663
 664         closedir(events_dir);
 665         return ret;
 666 }
 667
 668 struct __add_bpf_event_param {
 669         struct parse_events_state *parse_state;
 670         struct list_head *list;
 671         struct list_head *head_config;
 672 };
 673
 674 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 675                          void *_param)
 676 {
 677         LIST_HEAD(new_evsels);
 678         struct __add_bpf_event_param *param = _param;
 679         struct parse_events_state *parse_state = param->parse_state;
 680         struct list_head *list = param->list;
 681         struct evsel *pos;
 682         int err;
 683         /*
 684          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 685          * then don't add the tracepoint, this will be used for something else, like
 686          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 687          *
 688          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 689          */
 690         if (group[0] == '!')
 691                 return 0;
 692
 693         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 694                  group, event, fd);
 695
 696         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 697                                           event, parse_state->error,
 698                                           param->head_config);
 699         if (err) {
 700                 struct evsel *evsel, *tmp;
 701
 702                 pr_debug("Failed to add BPF event %s:%s\n",
 703                          group, event);
 704                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 705                         list_del_init(&evsel->core.node);
 706                         evsel__delete(evsel);
 707                 }
 708                 return err;
 709         }
 710         pr_debug("adding %s:%s\n", group, event);
 711
 712         list_for_each_entry(pos, &new_evsels, core.node) {
 713                 pr_debug("adding %s:%s to %p\n",
 714                          group, event, pos);
 715                 pos->bpf_fd = fd;
 716                 pos->bpf_obj = obj;
 717         }
 718         list_splice(&new_evsels, list);
 719         return 0;
 720 }
 721
 722 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 723                               struct list_head *list,
 724                               struct bpf_object *obj,
 725                               struct list_head *head_config)
 726 {
 727         int err;
 728         char errbuf[BUFSIZ];
 729         struct __add_bpf_event_param param = {parse_state, list, head_config};
 730         static bool registered_unprobe_atexit = false;
 731
 732         if (IS_ERR(obj) || !obj) {
 733                 snprintf(errbuf, sizeof(errbuf),
 734                          "Internal error: load bpf obj with NULL");
 735                 err = -EINVAL;
 736                 goto errout;
 737         }
 738
 739         /*
 740          * Register atexit handler before calling bpf__probe() so
 741          * bpf__probe() don't need to unprobe probe points its already
 742          * created when failure.
 743          */
 744         if (!registered_unprobe_atexit) {
 745                 atexit(bpf__clear);
 746                 registered_unprobe_atexit = true;
 747         }
 748
 749         err = bpf__probe(obj);
 750         if (err) {
 751                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 752                 goto errout;
 753         }
 754
 755         err = bpf__load(obj);
 756         if (err) {
 757                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 758                 goto errout;
 759         }
 760
 761         err = bpf__foreach_event(obj, add_bpf_event, &param);
 762         if (err) {
 763                 snprintf(errbuf, sizeof(errbuf),
 764                          "Attach events in BPF object failed");
 765                 goto errout;
 766         }
 767
 768         return 0;
 769 errout:
 770         parse_state->error->help = strdup("(add -v to see detail)");
 771         parse_state->error->str = strdup(errbuf);
 772         return err;
 773 }
 774
 775 static int
 776 parse_events_config_bpf(struct parse_events_state *parse_state,
 777                         struct bpf_object *obj,
 778                         struct list_head *head_config)
 779 {
 780         struct parse_events_term *term;
 781         int error_pos;
 782
 783         if (!head_config || list_empty(head_config))
 784                 return 0;
 785
 786         list_for_each_entry(term, head_config, list) {
 787                 char errbuf[BUFSIZ];
 788                 int err;
 789
 790                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 791                         snprintf(errbuf, sizeof(errbuf),
 792                                  "Invalid config term for BPF object");
 793                         errbuf[BUFSIZ - 1] = '\0';
 794
 795                         parse_state->error->idx = term->err_term;
 796                         parse_state->error->str = strdup(errbuf);
 797                         return -EINVAL;
 798                 }
 799
 800                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 801                 if (err) {
 802                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 803                                                  &error_pos, err, errbuf,
 804                                                  sizeof(errbuf));
 805                         parse_state->error->help = strdup(
 806 "Hint:\tValid config terms:\n"
 807 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 808 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 809 "\n"
 810 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 811 "     \t(add -v to see detail)");
 812                         parse_state->error->str = strdup(errbuf);
 813                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 814                                 parse_state->error->idx = term->err_val;
 815                         else
 816                                 parse_state->error->idx = term->err_term + error_pos;
 817                         return err;
 818                 }
 819         }
 820         return 0;
 821 }
 822
 823 /*
 824  * Split config terms:
 825  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 826  *  'call-graph=fp' is 'evt config', should be applied to each
 827  *  events in bpf.c.
 828  * 'map:array.value[0]=1' is 'obj config', should be processed
 829  * with parse_events_config_bpf.
 830  *
 831  * Move object config terms from the first list to obj_head_config.
 832  */
 833 static void
 834 split_bpf_config_terms(struct list_head *evt_head_config,
 835                        struct list_head *obj_head_config)
 836 {
 837         struct parse_events_term *term, *temp;
 838
 839         /*
 840          * Currectly, all possible user config term
 841          * belong to bpf object. parse_events__is_hardcoded_term()
 842          * happends to be a good flag.
 843          *
 844          * See parse_events_config_bpf() and
 845          * config_term_tracepoint().
 846          */
 847         list_for_each_entry_safe(term, temp, evt_head_config, list)
 848                 if (!parse_events__is_hardcoded_term(term))
 849                         list_move_tail(&term->list, obj_head_config);
 850 }
 851
 852 int parse_events_load_bpf(struct parse_events_state *parse_state,
 853                           struct list_head *list,
 854                           char *bpf_file_name,
 855                           bool source,
 856                           struct list_head *head_config)
 857 {
 858         int err;
 859         struct bpf_object *obj;
 860         LIST_HEAD(obj_head_config);
 861
 862         if (head_config)
 863                 split_bpf_config_terms(head_config, &obj_head_config);
 864
 865         obj = bpf__prepare_load(bpf_file_name, source);
 866         if (IS_ERR(obj)) {
 867                 char errbuf[BUFSIZ];
 868
 869                 err = PTR_ERR(obj);
 870
 871                 if (err == -ENOTSUP)
 872                         snprintf(errbuf, sizeof(errbuf),
 873                                  "BPF support is not compiled");
 874                 else
 875                         bpf__strerror_prepare_load(bpf_file_name,
 876                                                    source,
 877                                                    -err, errbuf,
 878                                                    sizeof(errbuf));
 879
 880                 parse_state->error->help = strdup("(add -v to see detail)");
 881                 parse_state->error->str = strdup(errbuf);
 882                 return err;
 883         }
 884
 885         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 886         if (err)
 887                 return err;
 888         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 889
 890         /*
 891          * Caller doesn't know anything about obj_head_config,
 892          * so combine them together again before returnning.
 893          */
 894         if (head_config)
 895                 list_splice_tail(&obj_head_config, head_config);
 896         return err;
 897 }
 898
 899 static int
 900 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 901 {
 902         int i;
 903
 904         for (i = 0; i < 3; i++) {
 905                 if (!type || !type[i])
 906                         break;
 907
 908 #define CHECK_SET_TYPE(bit)             \
 909 do {                                    \
 910         if (attr->bp_type & bit)        \
 911                 return -EINVAL;         \
 912         else                            \
 913                 attr->bp_type |= bit;   \
 914 } while (0)
 915
 916                 switch (type[i]) {
 917                 case 'r':
 918                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 919                         break;
 920                 case 'w':
 921                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 922                         break;
 923                 case 'x':
 924                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 925                         break;
 926                 default:
 927                         return -EINVAL;
 928                 }
 929         }
 930
 931 #undef CHECK_SET_TYPE
 932
 933         if (!attr->bp_type) /* Default */
 934                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 935
 936         return 0;
 937 }
 938
 939 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 940                                 void *ptr, char *type, u64 len)
 941 {
 942         struct perf_event_attr attr;
 943
 944         memset(&attr, 0, sizeof(attr));
 945         attr.bp_addr = (unsigned long) ptr;
 946
 947         if (parse_breakpoint_type(type, &attr))
 948                 return -EINVAL;
 949
 950         /* Provide some defaults if len is not specified */
 951         if (!len) {
 952                 if (attr.bp_type == HW_BREAKPOINT_X)
 953                         len = sizeof(long);
 954                 else
 955                         len = HW_BREAKPOINT_LEN_4;
 956         }
 957
 958         attr.bp_len = len;
 959
 960         attr.type = PERF_TYPE_BREAKPOINT;
 961         attr.sample_period = 1;
 962
 963         return add_event(list, idx, &attr, NULL, NULL);
 964 }
 965
 966 static int check_type_val(struct parse_events_term *term,
 967                           struct parse_events_error *err,
 968                           int type)
 969 {
 970         if (type == term->type_val)
 971                 return 0;
 972
 973         if (err) {
 974                 parse_events__handle_error(err, term->err_val,
 975                                         type == PARSE_EVENTS__TERM_TYPE_NUM
 976                                         ? strdup("expected numeric value")
 977                                         : strdup("expected string value"),
 978                                         NULL);
 979         }
 980         return -EINVAL;
 981 }
 982
 983 /*
 984  * Update according to parse-events.l
 985  */
 986 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 987         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
 988         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
 989         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
 990         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
 991         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
 992         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
 993         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
 994         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
 995         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
 996         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
 997         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
 998         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
 999         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1000         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1001         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1002         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1003         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1004         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1005         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1006         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1007         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1008 };
1009
1010 static bool config_term_shrinked;
1011
1012 static bool
1013 config_term_avail(int term_type, struct parse_events_error *err)
1014 {
1015         char *err_str;
1016
1017         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1018                 parse_events__handle_error(err, -1,
1019                                         strdup("Invalid term_type"), NULL);
1020                 return false;
1021         }
1022         if (!config_term_shrinked)
1023                 return true;
1024
1025         switch (term_type) {
1026         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1027         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1028         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1029         case PARSE_EVENTS__TERM_TYPE_NAME:
1030         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1031         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1032                 return true;
1033         default:
1034                 if (!err)
1035                         return false;
1036
1037                 /* term_type is validated so indexing is safe */
1038                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1039                                 config_term_names[term_type]) >= 0)
1040                         parse_events__handle_error(err, -1, err_str, NULL);
1041                 return false;
1042         }
1043 }
1044
1045 void parse_events__shrink_config_terms(void)
1046 {
1047         config_term_shrinked = true;
1048 }
1049
1050 static int config_term_common(struct perf_event_attr *attr,
1051                               struct parse_events_term *term,
1052                               struct parse_events_error *err)
1053 {
1054 #define CHECK_TYPE_VAL(type)                                               \
1055 do {                                                                       \
1056         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1057                 return -EINVAL;                                            \
1058 } while (0)
1059
1060         switch (term->type_term) {
1061         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1062                 CHECK_TYPE_VAL(NUM);
1063                 attr->config = term->val.num;
1064                 break;
1065         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1066                 CHECK_TYPE_VAL(NUM);
1067                 attr->config1 = term->val.num;
1068                 break;
1069         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1070                 CHECK_TYPE_VAL(NUM);
1071                 attr->config2 = term->val.num;
1072                 break;
1073         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1074                 CHECK_TYPE_VAL(NUM);
1075                 break;
1076         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1077                 CHECK_TYPE_VAL(NUM);
1078                 break;
1079         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1080                 CHECK_TYPE_VAL(STR);
1081                 if (strcmp(term->val.str, "no") &&
1082                     parse_branch_str(term->val.str,
1083                                     &attr->branch_sample_type)) {
1084                         parse_events__handle_error(err, term->err_val,
1085                                         strdup("invalid branch sample type"),
1086                                         NULL);
1087                         return -EINVAL;
1088                 }
1089                 break;
1090         case PARSE_EVENTS__TERM_TYPE_TIME:
1091                 CHECK_TYPE_VAL(NUM);
1092                 if (term->val.num > 1) {
1093                         parse_events__handle_error(err, term->err_val,
1094                                                 strdup("expected 0 or 1"),
1095                                                 NULL);
1096                         return -EINVAL;
1097                 }
1098                 break;
1099         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1100                 CHECK_TYPE_VAL(STR);
1101                 break;
1102         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1103                 CHECK_TYPE_VAL(NUM);
1104                 break;
1105         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1106                 CHECK_TYPE_VAL(NUM);
1107                 break;
1108         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1109                 CHECK_TYPE_VAL(NUM);
1110                 break;
1111         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1112                 CHECK_TYPE_VAL(NUM);
1113                 break;
1114         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1115                 CHECK_TYPE_VAL(NUM);
1116                 break;
1117         case PARSE_EVENTS__TERM_TYPE_NAME:
1118                 CHECK_TYPE_VAL(STR);
1119                 break;
1120         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1121                 CHECK_TYPE_VAL(NUM);
1122                 break;
1123         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1124                 CHECK_TYPE_VAL(NUM);
1125                 break;
1126         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1127                 CHECK_TYPE_VAL(NUM);
1128                 if ((unsigned int)term->val.num > 1) {
1129                         parse_events__handle_error(err, term->err_val,
1130                                                 strdup("expected 0 or 1"),
1131                                                 NULL);
1132                         return -EINVAL;
1133                 }
1134                 break;
1135         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1136                 CHECK_TYPE_VAL(NUM);
1137                 break;
1138         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1139                 CHECK_TYPE_VAL(NUM);
1140                 if (term->val.num > UINT_MAX) {
1141                         parse_events__handle_error(err, term->err_val,
1142                                                 strdup("too big"),
1143                                                 NULL);
1144                         return -EINVAL;
1145                 }
1146                 break;
1147         default:
1148                 parse_events__handle_error(err, term->err_term,
1149                                 strdup("unknown term"),
1150                                 parse_events_formats_error_string(NULL));
1151                 return -EINVAL;
1152         }
1153
1154         /*
1155          * Check term availbility after basic checking so
1156          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1157          *
1158          * If check availbility at the entry of this function,
1159          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1160          * if an invalid config term is provided for legacy events
1161          * (for example, instructions/badterm/...), which is confusing.
1162          */
1163         if (!config_term_avail(term->type_term, err))
1164                 return -EINVAL;
1165         return 0;
1166 #undef CHECK_TYPE_VAL
1167 }
1168
1169 static int config_term_pmu(struct perf_event_attr *attr,
1170                            struct parse_events_term *term,
1171                            struct parse_events_error *err)
1172 {
1173         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1174             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1175                 /*
1176                  * Always succeed for sysfs terms, as we dont know
1177                  * at this point what type they need to have.
1178                  */
1179                 return 0;
1180         else
1181                 return config_term_common(attr, term, err);
1182 }
1183
1184 static int config_term_tracepoint(struct perf_event_attr *attr,
1185                                   struct parse_events_term *term,
1186                                   struct parse_events_error *err)
1187 {
1188         switch (term->type_term) {
1189         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1190         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1191         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1192         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1193         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1194         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1195         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1196         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1197         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1198         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1199                 return config_term_common(attr, term, err);
1200         default:
1201                 if (err) {
1202                         parse_events__handle_error(err, term->err_term,
1203                                 strdup("unknown term"),
1204                                 strdup("valid terms: call-graph,stack-size\n"));
1205                 }
1206                 return -EINVAL;
1207         }
1208
1209         return 0;
1210 }
1211
1212 static int config_attr(struct perf_event_attr *attr,
1213                        struct list_head *head,
1214                        struct parse_events_error *err,
1215                        config_term_func_t config_term)
1216 {
1217         struct parse_events_term *term;
1218
1219         list_for_each_entry(term, head, list)
1220                 if (config_term(attr, term, err))
1221                         return -EINVAL;
1222
1223         return 0;
1224 }
1225
1226 static int get_config_terms(struct list_head *head_config,
1227                             struct list_head *head_terms __maybe_unused)
1228 {
1229 #define ADD_CONFIG_TERM(__type, __weak)                         \
1230         struct evsel_config_term *__t;                  \
1231                                                                 \
1232         __t = zalloc(sizeof(*__t));                             \
1233         if (!__t)                                               \
1234                 return -ENOMEM;                                 \
1235                                                                 \
1236         INIT_LIST_HEAD(&__t->list);                             \
1237         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1238         __t->weak       = __weak;                               \
1239         list_add_tail(&__t->list, head_terms)
1240
1241 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1242 do {                                                            \
1243         ADD_CONFIG_TERM(__type, __weak);                        \
1244         __t->val.__name = __val;                                \
1245 } while (0)
1246
1247 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1248 do {                                                            \
1249         ADD_CONFIG_TERM(__type, __weak);                        \
1250         __t->val.str = strdup(__val);                           \
1251         if (!__t->val.str) {                                    \
1252                 zfree(&__t);                                    \
1253                 return -ENOMEM;                                 \
1254         }                                                       \
1255         __t->free_str = true;                                   \
1256 } while (0)
1257
1258         struct parse_events_term *term;
1259
1260         list_for_each_entry(term, head_config, list) {
1261                 switch (term->type_term) {
1262                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1263                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1264                         break;
1265                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1266                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1267                         break;
1268                 case PARSE_EVENTS__TERM_TYPE_TIME:
1269                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1270                         break;
1271                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1272                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1273                         break;
1274                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1275                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1276                         break;
1277                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1278                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1279                                             term->val.num, term->weak);
1280                         break;
1281                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1282                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1283                                             term->val.num ? 1 : 0, term->weak);
1284                         break;
1285                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1286                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1287                                             term->val.num ? 0 : 1, term->weak);
1288                         break;
1289                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1290                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1291                                             term->val.num, term->weak);
1292                         break;
1293                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1294                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1295                                             term->val.num, term->weak);
1296                         break;
1297                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1298                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1299                                             term->val.num ? 1 : 0, term->weak);
1300                         break;
1301                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1302                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1303                                             term->val.num ? 0 : 1, term->weak);
1304                         break;
1305                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1306                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1307                         break;
1308                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1309                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1310                                             term->val.num ? true : false, term->weak);
1311                         break;
1312                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1313                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1314                                             term->val.num ? 1 : 0, term->weak);
1315                         break;
1316                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1317                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1318                                             term->val.num, term->weak);
1319                         break;
1320                 default:
1321                         break;
1322                 }
1323         }
1324         return 0;
1325 }
1326
1327 /*
1328  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1329  * each bit of attr->config that the user has changed.
1330  */
1331 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1332                            struct list_head *head_terms)
1333 {
1334         struct parse_events_term *term;
1335         u64 bits = 0;
1336         int type;
1337
1338         list_for_each_entry(term, head_config, list) {
1339                 switch (term->type_term) {
1340                 case PARSE_EVENTS__TERM_TYPE_USER:
1341                         type = perf_pmu__format_type(&pmu->format, term->config);
1342                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1343                                 continue;
1344                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1345                         break;
1346                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1347                         bits = ~(u64)0;
1348                         break;
1349                 default:
1350                         break;
1351                 }
1352         }
1353
1354         if (bits)
1355                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1356
1357 #undef ADD_CONFIG_TERM
1358         return 0;
1359 }
1360
1361 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1362                                 const char *sys, const char *event,
1363                                 struct parse_events_error *err,
1364                                 struct list_head *head_config)
1365 {
1366         if (head_config) {
1367                 struct perf_event_attr attr;
1368
1369                 if (config_attr(&attr, head_config, err,
1370                                 config_term_tracepoint))
1371                         return -EINVAL;
1372         }
1373
1374         if (strpbrk(sys, "*?"))
1375                 return add_tracepoint_multi_sys(list, idx, sys, event,
1376                                                 err, head_config);
1377         else
1378                 return add_tracepoint_event(list, idx, sys, event,
1379                                             err, head_config);
1380 }
1381
1382 int parse_events_add_numeric(struct parse_events_state *parse_state,
1383                              struct list_head *list,
1384                              u32 type, u64 config,
1385                              struct list_head *head_config)
1386 {
1387         struct perf_event_attr attr;
1388         LIST_HEAD(config_terms);
1389
1390         memset(&attr, 0, sizeof(attr));
1391         attr.type = type;
1392         attr.config = config;
1393
1394         if (head_config) {
1395                 if (config_attr(&attr, head_config, parse_state->error,
1396                                 config_term_common))
1397                         return -EINVAL;
1398
1399                 if (get_config_terms(head_config, &config_terms))
1400                         return -ENOMEM;
1401         }
1402
1403         return add_event(list, &parse_state->idx, &attr,
1404                          get_config_name(head_config), &config_terms);
1405 }
1406
1407 int parse_events_add_tool(struct parse_events_state *parse_state,
1408                           struct list_head *list,
1409                           enum perf_tool_event tool_event)
1410 {
1411         return add_event_tool(list, &parse_state->idx, tool_event);
1412 }
1413
1414 static bool config_term_percore(struct list_head *config_terms)
1415 {
1416         struct evsel_config_term *term;
1417
1418         list_for_each_entry(term, config_terms, list) {
1419                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1420                         return term->val.percore;
1421         }
1422
1423         return false;
1424 }
1425
1426 int parse_events_add_pmu(struct parse_events_state *parse_state,
1427                          struct list_head *list, char *name,
1428                          struct list_head *head_config,
1429                          bool auto_merge_stats,
1430                          bool use_alias)
1431 {
1432         struct perf_event_attr attr;
1433         struct perf_pmu_info info;
1434         struct perf_pmu *pmu;
1435         struct evsel *evsel;
1436         struct parse_events_error *err = parse_state->error;
1437         bool use_uncore_alias;
1438         LIST_HEAD(config_terms);
1439
1440         if (verbose > 1) {
1441                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1442                         name);
1443                 if (head_config) {
1444                         struct parse_events_term *term;
1445
1446                         list_for_each_entry(term, head_config, list) {
1447                                 fprintf(stderr, "%s,", term->config);
1448                         }
1449                 }
1450                 fprintf(stderr, "' that may result in non-fatal errors\n");
1451         }
1452
1453         pmu = perf_pmu__find(name);
1454         if (!pmu) {
1455                 char *err_str;
1456
1457                 if (asprintf(&err_str,
1458                                 "Cannot find PMU `%s'. Missing kernel support?",
1459                                 name) >= 0)
1460                         parse_events__handle_error(err, 0, err_str, NULL);
1461                 return -EINVAL;
1462         }
1463
1464         if (pmu->default_config) {
1465                 memcpy(&attr, pmu->default_config,
1466                        sizeof(struct perf_event_attr));
1467         } else {
1468                 memset(&attr, 0, sizeof(attr));
1469         }
1470
1471         use_uncore_alias = (pmu->is_uncore && use_alias);
1472
1473         if (!head_config) {
1474                 attr.type = pmu->type;
1475                 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1476                                     pmu, NULL, auto_merge_stats, NULL);
1477                 if (evsel) {
1478                         evsel->pmu_name = name ? strdup(name) : NULL;
1479                         evsel->use_uncore_alias = use_uncore_alias;
1480                         return 0;
1481                 } else {
1482                         return -ENOMEM;
1483                 }
1484         }
1485
1486         if (perf_pmu__check_alias(pmu, head_config, &info))
1487                 return -EINVAL;
1488
1489         if (verbose > 1) {
1490                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1491                         name);
1492                 if (head_config) {
1493                         struct parse_events_term *term;
1494
1495                         list_for_each_entry(term, head_config, list) {
1496                                 fprintf(stderr, "%s,", term->config);
1497                         }
1498                 }
1499                 fprintf(stderr, "' that may result in non-fatal errors\n");
1500         }
1501
1502         /*
1503          * Configure hardcoded terms first, no need to check
1504          * return value when called with fail == 0 ;)
1505          */
1506         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1507                 return -EINVAL;
1508
1509         if (get_config_terms(head_config, &config_terms))
1510                 return -ENOMEM;
1511
1512         /*
1513          * When using default config, record which bits of attr->config were
1514          * changed by the user.
1515          */
1516         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1517                 return -ENOMEM;
1518
1519         if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1520                 struct evsel_config_term *pos, *tmp;
1521
1522                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1523                         list_del_init(&pos->list);
1524                         if (pos->free_str)
1525                                 zfree(&pos->val.str);
1526                         free(pos);
1527                 }
1528                 return -EINVAL;
1529         }
1530
1531         evsel = __add_event(list, &parse_state->idx, &attr, true,
1532                             get_config_name(head_config), pmu,
1533                             &config_terms, auto_merge_stats, NULL);
1534         if (evsel) {
1535                 evsel->unit = info.unit;
1536                 evsel->scale = info.scale;
1537                 evsel->per_pkg = info.per_pkg;
1538                 evsel->snapshot = info.snapshot;
1539                 evsel->metric_expr = info.metric_expr;
1540                 evsel->metric_name = info.metric_name;
1541                 evsel->pmu_name = name ? strdup(name) : NULL;
1542                 evsel->use_uncore_alias = use_uncore_alias;
1543                 evsel->percore = config_term_percore(&evsel->config_terms);
1544         }
1545
1546         return evsel ? 0 : -ENOMEM;
1547 }
1548
1549 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1550                                char *str, struct list_head **listp)
1551 {
1552         struct parse_events_term *term;
1553         struct list_head *list;
1554         struct perf_pmu *pmu = NULL;
1555         int ok = 0;
1556
1557         *listp = NULL;
1558         /* Add it for all PMUs that support the alias */
1559         list = malloc(sizeof(struct list_head));
1560         if (!list)
1561                 return -1;
1562         INIT_LIST_HEAD(list);
1563         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1564                 struct perf_pmu_alias *alias;
1565
1566                 list_for_each_entry(alias, &pmu->aliases, list) {
1567                         if (!strcasecmp(alias->name, str)) {
1568                                 struct list_head *head;
1569                                 char *config;
1570
1571                                 head = malloc(sizeof(struct list_head));
1572                                 if (!head)
1573                                         return -1;
1574                                 INIT_LIST_HEAD(head);
1575                                 config = strdup(str);
1576                                 if (!config)
1577                                         return -1;
1578                                 if (parse_events_term__num(&term,
1579                                                    PARSE_EVENTS__TERM_TYPE_USER,
1580                                                    config, 1, false, &config,
1581                                                    NULL) < 0) {
1582                                         free(list);
1583                                         free(config);
1584                                         return -1;
1585                                 }
1586                                 list_add_tail(&term->list, head);
1587
1588                                 if (!parse_events_add_pmu(parse_state, list,
1589                                                           pmu->name, head,
1590                                                           true, true)) {
1591                                         pr_debug("%s -> %s/%s/\n", str,
1592                                                  pmu->name, alias->str);
1593                                         ok++;
1594                                 }
1595
1596                                 parse_events_terms__delete(head);
1597                         }
1598                 }
1599         }
1600         if (!ok) {
1601                 free(list);
1602                 return -1;
1603         }
1604         *listp = list;
1605         return 0;
1606 }
1607
1608 int parse_events__modifier_group(struct list_head *list,
1609                                  char *event_mod)
1610 {
1611         return parse_events__modifier_event(list, event_mod, true);
1612 }
1613
1614 /*
1615  * Check if the two uncore PMUs are from the same uncore block
1616  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1617  */
1618 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1619 {
1620         char *end_a, *end_b;
1621
1622         end_a = strrchr(pmu_name_a, '_');
1623         end_b = strrchr(pmu_name_b, '_');
1624
1625         if (!end_a || !end_b)
1626                 return false;
1627
1628         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1629                 return false;
1630
1631         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1632 }
1633
1634 static int
1635 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1636                                            struct parse_events_state *parse_state)
1637 {
1638         struct evsel *evsel, *leader;
1639         uintptr_t *leaders;
1640         bool is_leader = true;
1641         int i, nr_pmu = 0, total_members, ret = 0;
1642
1643         leader = list_first_entry(list, struct evsel, core.node);
1644         evsel = list_last_entry(list, struct evsel, core.node);
1645         total_members = evsel->idx - leader->idx + 1;
1646
1647         leaders = calloc(total_members, sizeof(uintptr_t));
1648         if (WARN_ON(!leaders))
1649                 return 0;
1650
1651         /*
1652          * Going through the whole group and doing sanity check.
1653          * All members must use alias, and be from the same uncore block.
1654          * Also, storing the leader events in an array.
1655          */
1656         __evlist__for_each_entry(list, evsel) {
1657
1658                 /* Only split the uncore group which members use alias */
1659                 if (!evsel->use_uncore_alias)
1660                         goto out;
1661
1662                 /* The events must be from the same uncore block */
1663                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1664                         goto out;
1665
1666                 if (!is_leader)
1667                         continue;
1668                 /*
1669                  * If the event's PMU name starts to repeat, it must be a new
1670                  * event. That can be used to distinguish the leader from
1671                  * other members, even they have the same event name.
1672                  */
1673                 if ((leader != evsel) &&
1674                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1675                         is_leader = false;
1676                         continue;
1677                 }
1678
1679                 /* Store the leader event for each PMU */
1680                 leaders[nr_pmu++] = (uintptr_t) evsel;
1681         }
1682
1683         /* only one event alias */
1684         if (nr_pmu == total_members) {
1685                 parse_state->nr_groups--;
1686                 goto handled;
1687         }
1688
1689         /*
1690          * An uncore event alias is a joint name which means the same event
1691          * runs on all PMUs of a block.
1692          * Perf doesn't support mixed events from different PMUs in the same
1693          * group. The big group has to be split into multiple small groups
1694          * which only include the events from the same PMU.
1695          *
1696          * Here the uncore event aliases must be from the same uncore block.
1697          * The number of PMUs must be same for each alias. The number of new
1698          * small groups equals to the number of PMUs.
1699          * Setting the leader event for corresponding members in each group.
1700          */
1701         i = 0;
1702         __evlist__for_each_entry(list, evsel) {
1703                 if (i >= nr_pmu)
1704                         i = 0;
1705                 evsel->leader = (struct evsel *) leaders[i++];
1706         }
1707
1708         /* The number of members and group name are same for each group */
1709         for (i = 0; i < nr_pmu; i++) {
1710                 evsel = (struct evsel *) leaders[i];
1711                 evsel->core.nr_members = total_members / nr_pmu;
1712                 evsel->group_name = name ? strdup(name) : NULL;
1713         }
1714
1715         /* Take the new small groups into account */
1716         parse_state->nr_groups += nr_pmu - 1;
1717
1718 handled:
1719         ret = 1;
1720 out:
1721         free(leaders);
1722         return ret;
1723 }
1724
1725 void parse_events__set_leader(char *name, struct list_head *list,
1726                               struct parse_events_state *parse_state)
1727 {
1728         struct evsel *leader;
1729
1730         if (list_empty(list)) {
1731                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1732                 return;
1733         }
1734
1735         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1736                 return;
1737
1738         __perf_evlist__set_leader(list);
1739         leader = list_entry(list->next, struct evsel, core.node);
1740         leader->group_name = name ? strdup(name) : NULL;
1741 }
1742
1743 /* list_event is assumed to point to malloc'ed memory */
1744 void parse_events_update_lists(struct list_head *list_event,
1745                                struct list_head *list_all)
1746 {
1747         /*
1748          * Called for single event definition. Update the
1749          * 'all event' list, and reinit the 'single event'
1750          * list, for next event definition.
1751          */
1752         list_splice_tail(list_event, list_all);
1753         free(list_event);
1754 }
1755
1756 struct event_modifier {
1757         int eu;
1758         int ek;
1759         int eh;
1760         int eH;
1761         int eG;
1762         int eI;
1763         int precise;
1764         int precise_max;
1765         int exclude_GH;
1766         int sample_read;
1767         int pinned;
1768         int weak;
1769 };
1770
1771 static int get_event_modifier(struct event_modifier *mod, char *str,
1772                                struct evsel *evsel)
1773 {
1774         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1775         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1776         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1777         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1778         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1779         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1780         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1781         int precise_max = 0;
1782         int sample_read = 0;
1783         int pinned = evsel ? evsel->core.attr.pinned : 0;
1784
1785         int exclude = eu | ek | eh;
1786         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1787         int weak = 0;
1788
1789         memset(mod, 0, sizeof(*mod));
1790
1791         while (*str) {
1792                 if (*str == 'u') {
1793                         if (!exclude)
1794                                 exclude = eu = ek = eh = 1;
1795                         eu = 0;
1796                 } else if (*str == 'k') {
1797                         if (!exclude)
1798                                 exclude = eu = ek = eh = 1;
1799                         ek = 0;
1800                 } else if (*str == 'h') {
1801                         if (!exclude)
1802                                 exclude = eu = ek = eh = 1;
1803                         eh = 0;
1804                 } else if (*str == 'G') {
1805                         if (!exclude_GH)
1806                                 exclude_GH = eG = eH = 1;
1807                         eG = 0;
1808                 } else if (*str == 'H') {
1809                         if (!exclude_GH)
1810                                 exclude_GH = eG = eH = 1;
1811                         eH = 0;
1812                 } else if (*str == 'I') {
1813                         eI = 1;
1814                 } else if (*str == 'p') {
1815                         precise++;
1816                         /* use of precise requires exclude_guest */
1817                         if (!exclude_GH)
1818                                 eG = 1;
1819                 } else if (*str == 'P') {
1820                         precise_max = 1;
1821                 } else if (*str == 'S') {
1822                         sample_read = 1;
1823                 } else if (*str == 'D') {
1824                         pinned = 1;
1825                 } else if (*str == 'W') {
1826                         weak = 1;
1827                 } else
1828                         break;
1829
1830                 ++str;
1831         }
1832
1833         /*
1834          * precise ip:
1835          *
1836          *  0 - SAMPLE_IP can have arbitrary skid
1837          *  1 - SAMPLE_IP must have constant skid
1838          *  2 - SAMPLE_IP requested to have 0 skid
1839          *  3 - SAMPLE_IP must have 0 skid
1840          *
1841          *  See also PERF_RECORD_MISC_EXACT_IP
1842          */
1843         if (precise > 3)
1844                 return -EINVAL;
1845
1846         mod->eu = eu;
1847         mod->ek = ek;
1848         mod->eh = eh;
1849         mod->eH = eH;
1850         mod->eG = eG;
1851         mod->eI = eI;
1852         mod->precise = precise;
1853         mod->precise_max = precise_max;
1854         mod->exclude_GH = exclude_GH;
1855         mod->sample_read = sample_read;
1856         mod->pinned = pinned;
1857         mod->weak = weak;
1858
1859         return 0;
1860 }
1861
1862 /*
1863  * Basic modifier sanity check to validate it contains only one
1864  * instance of any modifier (apart from 'p') present.
1865  */
1866 static int check_modifier(char *str)
1867 {
1868         char *p = str;
1869
1870         /* The sizeof includes 0 byte as well. */
1871         if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1872                 return -1;
1873
1874         while (*p) {
1875                 if (*p != 'p' && strchr(p + 1, *p))
1876                         return -1;
1877                 p++;
1878         }
1879
1880         return 0;
1881 }
1882
1883 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1884 {
1885         struct evsel *evsel;
1886         struct event_modifier mod;
1887
1888         if (str == NULL)
1889                 return 0;
1890
1891         if (check_modifier(str))
1892                 return -EINVAL;
1893
1894         if (!add && get_event_modifier(&mod, str, NULL))
1895                 return -EINVAL;
1896
1897         __evlist__for_each_entry(list, evsel) {
1898                 if (add && get_event_modifier(&mod, str, evsel))
1899                         return -EINVAL;
1900
1901                 evsel->core.attr.exclude_user   = mod.eu;
1902                 evsel->core.attr.exclude_kernel = mod.ek;
1903                 evsel->core.attr.exclude_hv     = mod.eh;
1904                 evsel->core.attr.precise_ip     = mod.precise;
1905                 evsel->core.attr.exclude_host   = mod.eH;
1906                 evsel->core.attr.exclude_guest  = mod.eG;
1907                 evsel->core.attr.exclude_idle   = mod.eI;
1908                 evsel->exclude_GH          = mod.exclude_GH;
1909                 evsel->sample_read         = mod.sample_read;
1910                 evsel->precise_max         = mod.precise_max;
1911                 evsel->weak_group          = mod.weak;
1912
1913                 if (evsel__is_group_leader(evsel))
1914                         evsel->core.attr.pinned = mod.pinned;
1915         }
1916
1917         return 0;
1918 }
1919
1920 int parse_events_name(struct list_head *list, char *name)
1921 {
1922         struct evsel *evsel;
1923
1924         __evlist__for_each_entry(list, evsel) {
1925                 if (!evsel->name)
1926                         evsel->name = strdup(name);
1927         }
1928
1929         return 0;
1930 }
1931
1932 static int
1933 comp_pmu(const void *p1, const void *p2)
1934 {
1935         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1936         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1937
1938         return strcasecmp(pmu1->symbol, pmu2->symbol);
1939 }
1940
1941 static void perf_pmu__parse_cleanup(void)
1942 {
1943         if (perf_pmu_events_list_num > 0) {
1944                 struct perf_pmu_event_symbol *p;
1945                 int i;
1946
1947                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1948                         p = perf_pmu_events_list + i;
1949                         zfree(&p->symbol);
1950                 }
1951                 zfree(&perf_pmu_events_list);
1952                 perf_pmu_events_list_num = 0;
1953         }
1954 }
1955
1956 #define SET_SYMBOL(str, stype)          \
1957 do {                                    \
1958         p->symbol = str;                \
1959         if (!p->symbol)                 \
1960                 goto err;               \
1961         p->type = stype;                \
1962 } while (0)
1963
1964 /*
1965  * Read the pmu events list from sysfs
1966  * Save it into perf_pmu_events_list
1967  */
1968 static void perf_pmu__parse_init(void)
1969 {
1970
1971         struct perf_pmu *pmu = NULL;
1972         struct perf_pmu_alias *alias;
1973         int len = 0;
1974
1975         pmu = NULL;
1976         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1977                 list_for_each_entry(alias, &pmu->aliases, list) {
1978                         if (strchr(alias->name, '-'))
1979                                 len++;
1980                         len++;
1981                 }
1982         }
1983
1984         if (len == 0) {
1985                 perf_pmu_events_list_num = -1;
1986                 return;
1987         }
1988         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1989         if (!perf_pmu_events_list)
1990                 return;
1991         perf_pmu_events_list_num = len;
1992
1993         len = 0;
1994         pmu = NULL;
1995         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1996                 list_for_each_entry(alias, &pmu->aliases, list) {
1997                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1998                         char *tmp = strchr(alias->name, '-');
1999
2000                         if (tmp != NULL) {
2001                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2002                                                 PMU_EVENT_SYMBOL_PREFIX);
2003                                 p++;
2004                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2005                                 len += 2;
2006                         } else {
2007                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2008                                 len++;
2009                         }
2010                 }
2011         }
2012         qsort(perf_pmu_events_list, len,
2013                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2014
2015         return;
2016 err:
2017         perf_pmu__parse_cleanup();
2018 }
2019
2020 enum perf_pmu_event_symbol_type
2021 perf_pmu__parse_check(const char *name)
2022 {
2023         struct perf_pmu_event_symbol p, *r;
2024
2025         /* scan kernel pmu events from sysfs if needed */
2026         if (perf_pmu_events_list_num == 0)
2027                 perf_pmu__parse_init();
2028         /*
2029          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2030          * cpu-cycles has been handled by hardcode.
2031          * So it must be cpu// events, not kernel pmu event.
2032          */
2033         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2034                 return PMU_EVENT_SYMBOL_ERR;
2035
2036         p.symbol = strdup(name);
2037         r = bsearch(&p, perf_pmu_events_list,
2038                         (size_t) perf_pmu_events_list_num,
2039                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2040         zfree(&p.symbol);
2041         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2042 }
2043
2044 static int parse_events__scanner(const char *str,
2045                                  struct parse_events_state *parse_state)
2046 {
2047         YY_BUFFER_STATE buffer;
2048         void *scanner;
2049         int ret;
2050
2051         ret = parse_events_lex_init_extra(parse_state, &scanner);
2052         if (ret)
2053                 return ret;
2054
2055         buffer = parse_events__scan_string(str, scanner);
2056
2057 #ifdef PARSER_DEBUG
2058         parse_events_debug = 1;
2059         parse_events_set_debug(1, scanner);
2060 #endif
2061         ret = parse_events_parse(parse_state, scanner);
2062
2063         parse_events__flush_buffer(buffer, scanner);
2064         parse_events__delete_buffer(buffer, scanner);
2065         parse_events_lex_destroy(scanner);
2066         return ret;
2067 }
2068
2069 /*
2070  * parse event config string, return a list of event terms.
2071  */
2072 int parse_events_terms(struct list_head *terms, const char *str)
2073 {
2074         struct parse_events_state parse_state = {
2075                 .terms  = NULL,
2076                 .stoken = PE_START_TERMS,
2077         };
2078         int ret;
2079
2080         ret = parse_events__scanner(str, &parse_state);
2081         if (!ret) {
2082                 list_splice(parse_state.terms, terms);
2083                 zfree(&parse_state.terms);
2084                 return 0;
2085         }
2086
2087         parse_events_terms__delete(parse_state.terms);
2088         return ret;
2089 }
2090
2091 int parse_events(struct evlist *evlist, const char *str,
2092                  struct parse_events_error *err)
2093 {
2094         struct parse_events_state parse_state = {
2095                 .list   = LIST_HEAD_INIT(parse_state.list),
2096                 .idx    = evlist->core.nr_entries,
2097                 .error  = err,
2098                 .evlist = evlist,
2099                 .stoken = PE_START_EVENTS,
2100         };
2101         int ret;
2102
2103         ret = parse_events__scanner(str, &parse_state);
2104         perf_pmu__parse_cleanup();
2105
2106         if (!ret && list_empty(&parse_state.list)) {
2107                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2108                 return -1;
2109         }
2110
2111         /*
2112          * Add list to the evlist even with errors to allow callers to clean up.
2113          */
2114         perf_evlist__splice_list_tail(evlist, &parse_state.list);
2115
2116         if (!ret) {
2117                 struct evsel *last;
2118
2119                 evlist->nr_groups += parse_state.nr_groups;
2120                 last = evlist__last(evlist);
2121                 last->cmdline_group_boundary = true;
2122
2123                 return 0;
2124         }
2125
2126         /*
2127          * There are 2 users - builtin-record and builtin-test objects.
2128          * Both call evlist__delete in case of error, so we dont
2129          * need to bother.
2130          */
2131         return ret;
2132 }
2133
2134 #define MAX_WIDTH 1000
2135 static int get_term_width(void)
2136 {
2137         struct winsize ws;
2138
2139         get_term_dimensions(&ws);
2140         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2141 }
2142
2143 static void __parse_events_print_error(int err_idx, const char *err_str,
2144                                 const char *err_help, const char *event)
2145 {
2146         const char *str = "invalid or unsupported event: ";
2147         char _buf[MAX_WIDTH];
2148         char *buf = (char *) event;
2149         int idx = 0;
2150         if (err_str) {
2151                 /* -2 for extra '' in the final fprintf */
2152                 int width       = get_term_width() - 2;
2153                 int len_event   = strlen(event);
2154                 int len_str, max_len, cut = 0;
2155
2156                 /*
2157                  * Maximum error index indent, we will cut
2158                  * the event string if it's bigger.
2159                  */
2160                 int max_err_idx = 13;
2161
2162                 /*
2163                  * Let's be specific with the message when
2164                  * we have the precise error.
2165                  */
2166                 str     = "event syntax error: ";
2167                 len_str = strlen(str);
2168                 max_len = width - len_str;
2169
2170                 buf = _buf;
2171
2172                 /* We're cutting from the beginning. */
2173                 if (err_idx > max_err_idx)
2174                         cut = err_idx - max_err_idx;
2175
2176                 strncpy(buf, event + cut, max_len);
2177
2178                 /* Mark cut parts with '..' on both sides. */
2179                 if (cut)
2180                         buf[0] = buf[1] = '.';
2181
2182                 if ((len_event - cut) > max_len) {
2183                         buf[max_len - 1] = buf[max_len - 2] = '.';
2184                         buf[max_len] = 0;
2185                 }
2186
2187                 idx = len_str + err_idx - cut;
2188         }
2189
2190         fprintf(stderr, "%s'%s'\n", str, buf);
2191         if (idx) {
2192                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2193                 if (err_help)
2194                         fprintf(stderr, "\n%s\n", err_help);
2195         }
2196 }
2197
2198 void parse_events_print_error(struct parse_events_error *err,
2199                               const char *event)
2200 {
2201         if (!err->num_errors)
2202                 return;
2203
2204         __parse_events_print_error(err->idx, err->str, err->help, event);
2205         zfree(&err->str);
2206         zfree(&err->help);
2207
2208         if (err->num_errors > 1) {
2209                 fputs("\nInitial error:\n", stderr);
2210                 __parse_events_print_error(err->first_idx, err->first_str,
2211                                         err->first_help, event);
2212                 zfree(&err->first_str);
2213                 zfree(&err->first_help);
2214         }
2215 }
2216
2217 #undef MAX_WIDTH
2218
2219 int parse_events_option(const struct option *opt, const char *str,
2220                         int unset __maybe_unused)
2221 {
2222         struct evlist *evlist = *(struct evlist **)opt->value;
2223         struct parse_events_error err;
2224         int ret;
2225
2226         bzero(&err, sizeof(err));
2227         ret = parse_events(evlist, str, &err);
2228
2229         if (ret) {
2230                 parse_events_print_error(&err, str);
2231                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2232         }
2233
2234         return ret;
2235 }
2236
2237 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2238 {
2239         struct evlist **evlistp = opt->value;
2240         int ret;
2241
2242         if (*evlistp == NULL) {
2243                 *evlistp = evlist__new();
2244
2245                 if (*evlistp == NULL) {
2246                         fprintf(stderr, "Not enough memory to create evlist\n");
2247                         return -1;
2248                 }
2249         }
2250
2251         ret = parse_events_option(opt, str, unset);
2252         if (ret) {
2253                 evlist__delete(*evlistp);
2254                 *evlistp = NULL;
2255         }
2256
2257         return ret;
2258 }
2259
2260 static int
2261 foreach_evsel_in_last_glob(struct evlist *evlist,
2262                            int (*func)(struct evsel *evsel,
2263                                        const void *arg),
2264                            const void *arg)
2265 {
2266         struct evsel *last = NULL;
2267         int err;
2268
2269         /*
2270          * Don't return when list_empty, give func a chance to report
2271          * error when it found last == NULL.
2272          *
2273          * So no need to WARN here, let *func do this.
2274          */
2275         if (evlist->core.nr_entries > 0)
2276                 last = evlist__last(evlist);
2277
2278         do {
2279                 err = (*func)(last, arg);
2280                 if (err)
2281                         return -1;
2282                 if (!last)
2283                         return 0;
2284
2285                 if (last->core.node.prev == &evlist->core.entries)
2286                         return 0;
2287                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2288         } while (!last->cmdline_group_boundary);
2289
2290         return 0;
2291 }
2292
2293 static int set_filter(struct evsel *evsel, const void *arg)
2294 {
2295         const char *str = arg;
2296         bool found = false;
2297         int nr_addr_filters = 0;
2298         struct perf_pmu *pmu = NULL;
2299
2300         if (evsel == NULL) {
2301                 fprintf(stderr,
2302                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2303                 return -1;
2304         }
2305
2306         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2307                 if (evsel__append_tp_filter(evsel, str) < 0) {
2308                         fprintf(stderr,
2309                                 "not enough memory to hold filter string\n");
2310                         return -1;
2311                 }
2312
2313                 return 0;
2314         }
2315
2316         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2317                 if (pmu->type == evsel->core.attr.type) {
2318                         found = true;
2319                         break;
2320                 }
2321
2322         if (found)
2323                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2324                                     "%d", &nr_addr_filters);
2325
2326         if (!nr_addr_filters) {
2327                 fprintf(stderr,
2328                         "This CPU does not support address filtering\n");
2329                 return -1;
2330         }
2331
2332         if (evsel__append_addr_filter(evsel, str) < 0) {
2333                 fprintf(stderr,
2334                         "not enough memory to hold filter string\n");
2335                 return -1;
2336         }
2337
2338         return 0;
2339 }
2340
2341 int parse_filter(const struct option *opt, const char *str,
2342                  int unset __maybe_unused)
2343 {
2344         struct evlist *evlist = *(struct evlist **)opt->value;
2345
2346         return foreach_evsel_in_last_glob(evlist, set_filter,
2347                                           (const void *)str);
2348 }
2349
2350 static int add_exclude_perf_filter(struct evsel *evsel,
2351                                    const void *arg __maybe_unused)
2352 {
2353         char new_filter[64];
2354
2355         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2356                 fprintf(stderr,
2357                         "--exclude-perf option should follow a -e tracepoint option\n");
2358                 return -1;
2359         }
2360
2361         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2362
2363         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2364                 fprintf(stderr,
2365                         "not enough memory to hold filter string\n");
2366                 return -1;
2367         }
2368
2369         return 0;
2370 }
2371
2372 int exclude_perf(const struct option *opt,
2373                  const char *arg __maybe_unused,
2374                  int unset __maybe_unused)
2375 {
2376         struct evlist *evlist = *(struct evlist **)opt->value;
2377
2378         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2379                                           NULL);
2380 }
2381
2382 static const char * const event_type_descriptors[] = {
2383         "Hardware event",
2384         "Software event",
2385         "Tracepoint event",
2386         "Hardware cache event",
2387         "Raw hardware event descriptor",
2388         "Hardware breakpoint",
2389 };
2390
2391 static int cmp_string(const void *a, const void *b)
2392 {
2393         const char * const *as = a;
2394         const char * const *bs = b;
2395
2396         return strcmp(*as, *bs);
2397 }
2398
2399 /*
2400  * Print the events from <debugfs_mount_point>/tracing/events
2401  */
2402
2403 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2404                              bool name_only)
2405 {
2406         DIR *sys_dir, *evt_dir;
2407         struct dirent *sys_dirent, *evt_dirent;
2408         char evt_path[MAXPATHLEN];
2409         char *dir_path;
2410         char **evt_list = NULL;
2411         unsigned int evt_i = 0, evt_num = 0;
2412         bool evt_num_known = false;
2413
2414 restart:
2415         sys_dir = tracing_events__opendir();
2416         if (!sys_dir)
2417                 return;
2418
2419         if (evt_num_known) {
2420                 evt_list = zalloc(sizeof(char *) * evt_num);
2421                 if (!evt_list)
2422                         goto out_close_sys_dir;
2423         }
2424
2425         for_each_subsystem(sys_dir, sys_dirent) {
2426                 if (subsys_glob != NULL &&
2427                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2428                         continue;
2429
2430                 dir_path = get_events_file(sys_dirent->d_name);
2431                 if (!dir_path)
2432                         continue;
2433                 evt_dir = opendir(dir_path);
2434                 if (!evt_dir)
2435                         goto next;
2436
2437                 for_each_event(dir_path, evt_dir, evt_dirent) {
2438                         if (event_glob != NULL &&
2439                             !strglobmatch(evt_dirent->d_name, event_glob))
2440                                 continue;
2441
2442                         if (!evt_num_known) {
2443                                 evt_num++;
2444                                 continue;
2445                         }
2446
2447                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2448                                  sys_dirent->d_name, evt_dirent->d_name);
2449
2450                         evt_list[evt_i] = strdup(evt_path);
2451                         if (evt_list[evt_i] == NULL) {
2452                                 put_events_file(dir_path);
2453                                 goto out_close_evt_dir;
2454                         }
2455                         evt_i++;
2456                 }
2457                 closedir(evt_dir);
2458 next:
2459                 put_events_file(dir_path);
2460         }
2461         closedir(sys_dir);
2462
2463         if (!evt_num_known) {
2464                 evt_num_known = true;
2465                 goto restart;
2466         }
2467         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2468         evt_i = 0;
2469         while (evt_i < evt_num) {
2470                 if (name_only) {
2471                         printf("%s ", evt_list[evt_i++]);
2472                         continue;
2473                 }
2474                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2475                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2476         }
2477         if (evt_num && pager_in_use())
2478                 printf("\n");
2479
2480 out_free:
2481         evt_num = evt_i;
2482         for (evt_i = 0; evt_i < evt_num; evt_i++)
2483                 zfree(&evt_list[evt_i]);
2484         zfree(&evt_list);
2485         return;
2486
2487 out_close_evt_dir:
2488         closedir(evt_dir);
2489 out_close_sys_dir:
2490         closedir(sys_dir);
2491
2492         printf("FATAL: not enough memory to print %s\n",
2493                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2494         if (evt_list)
2495                 goto out_free;
2496 }
2497
2498 /*
2499  * Check whether event is in <debugfs_mount_point>/tracing/events
2500  */
2501
2502 int is_valid_tracepoint(const char *event_string)
2503 {
2504         DIR *sys_dir, *evt_dir;
2505         struct dirent *sys_dirent, *evt_dirent;
2506         char evt_path[MAXPATHLEN];
2507         char *dir_path;
2508
2509         sys_dir = tracing_events__opendir();
2510         if (!sys_dir)
2511                 return 0;
2512
2513         for_each_subsystem(sys_dir, sys_dirent) {
2514                 dir_path = get_events_file(sys_dirent->d_name);
2515                 if (!dir_path)
2516                         continue;
2517                 evt_dir = opendir(dir_path);
2518                 if (!evt_dir)
2519                         goto next;
2520
2521                 for_each_event(dir_path, evt_dir, evt_dirent) {
2522                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2523                                  sys_dirent->d_name, evt_dirent->d_name);
2524                         if (!strcmp(evt_path, event_string)) {
2525                                 closedir(evt_dir);
2526                                 closedir(sys_dir);
2527                                 return 1;
2528                         }
2529                 }
2530                 closedir(evt_dir);
2531 next:
2532                 put_events_file(dir_path);
2533         }
2534         closedir(sys_dir);
2535         return 0;
2536 }
2537
2538 static bool is_event_supported(u8 type, unsigned config)
2539 {
2540         bool ret = true;
2541         int open_return;
2542         struct evsel *evsel;
2543         struct perf_event_attr attr = {
2544                 .type = type,
2545                 .config = config,
2546                 .disabled = 1,
2547         };
2548         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2549
2550         if (tmap == NULL)
2551                 return false;
2552
2553         evsel = evsel__new(&attr);
2554         if (evsel) {
2555                 open_return = evsel__open(evsel, NULL, tmap);
2556                 ret = open_return >= 0;
2557
2558                 if (open_return == -EACCES) {
2559                         /*
2560                          * This happens if the paranoid value
2561                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2562                          * Re-run with exclude_kernel set; we don't do that
2563                          * by default as some ARM machines do not support it.
2564                          *
2565                          */
2566                         evsel->core.attr.exclude_kernel = 1;
2567                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2568                 }
2569                 evsel__delete(evsel);
2570         }
2571
2572         perf_thread_map__put(tmap);
2573         return ret;
2574 }
2575
2576 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2577                       bool name_only)
2578 {
2579         struct probe_cache *pcache;
2580         struct probe_cache_entry *ent;
2581         struct strlist *bidlist, *sdtlist;
2582         struct strlist_config cfg = {.dont_dupstr = true};
2583         struct str_node *nd, *nd2;
2584         char *buf, *path, *ptr = NULL;
2585         bool show_detail = false;
2586         int ret;
2587
2588         sdtlist = strlist__new(NULL, &cfg);
2589         if (!sdtlist) {
2590                 pr_debug("Failed to allocate new strlist for SDT\n");
2591                 return;
2592         }
2593         bidlist = build_id_cache__list_all(true);
2594         if (!bidlist) {
2595                 pr_debug("Failed to get buildids: %d\n", errno);
2596                 return;
2597         }
2598         strlist__for_each_entry(nd, bidlist) {
2599                 pcache = probe_cache__new(nd->s, NULL);
2600                 if (!pcache)
2601                         continue;
2602                 list_for_each_entry(ent, &pcache->entries, node) {
2603                         if (!ent->sdt)
2604                                 continue;
2605                         if (subsys_glob &&
2606                             !strglobmatch(ent->pev.group, subsys_glob))
2607                                 continue;
2608                         if (event_glob &&
2609                             !strglobmatch(ent->pev.event, event_glob))
2610                                 continue;
2611                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2612                                         ent->pev.event, nd->s);
2613                         if (ret > 0)
2614                                 strlist__add(sdtlist, buf);
2615                 }
2616                 probe_cache__delete(pcache);
2617         }
2618         strlist__delete(bidlist);
2619
2620         strlist__for_each_entry(nd, sdtlist) {
2621                 buf = strchr(nd->s, '@');
2622                 if (buf)
2623                         *(buf++) = '\0';
2624                 if (name_only) {
2625                         printf("%s ", nd->s);
2626                         continue;
2627                 }
2628                 nd2 = strlist__next(nd);
2629                 if (nd2) {
2630                         ptr = strchr(nd2->s, '@');
2631                         if (ptr)
2632                                 *ptr = '\0';
2633                         if (strcmp(nd->s, nd2->s) == 0)
2634                                 show_detail = true;
2635                 }
2636                 if (show_detail) {
2637                         path = build_id_cache__origname(buf);
2638                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2639                         if (ret > 0) {
2640                                 printf("  %-50s [%s]\n", buf, "SDT event");
2641                                 free(buf);
2642                         }
2643                         free(path);
2644                 } else
2645                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2646                 if (nd2) {
2647                         if (strcmp(nd->s, nd2->s) != 0)
2648                                 show_detail = false;
2649                         if (ptr)
2650                                 *ptr = '@';
2651                 }
2652         }
2653         strlist__delete(sdtlist);
2654 }
2655
2656 int print_hwcache_events(const char *event_glob, bool name_only)
2657 {
2658         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2659         char name[64];
2660         char **evt_list = NULL;
2661         bool evt_num_known = false;
2662
2663 restart:
2664         if (evt_num_known) {
2665                 evt_list = zalloc(sizeof(char *) * evt_num);
2666                 if (!evt_list)
2667                         goto out_enomem;
2668         }
2669
2670         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2671                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2672                         /* skip invalid cache type */
2673                         if (!evsel__is_cache_op_valid(type, op))
2674                                 continue;
2675
2676                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2677                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2678                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2679                                         continue;
2680
2681                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2682                                                         type | (op << 8) | (i << 16)))
2683                                         continue;
2684
2685                                 if (!evt_num_known) {
2686                                         evt_num++;
2687                                         continue;
2688                                 }
2689
2690                                 evt_list[evt_i] = strdup(name);
2691                                 if (evt_list[evt_i] == NULL)
2692                                         goto out_enomem;
2693                                 evt_i++;
2694                         }
2695                 }
2696         }
2697
2698         if (!evt_num_known) {
2699                 evt_num_known = true;
2700                 goto restart;
2701         }
2702         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2703         evt_i = 0;
2704         while (evt_i < evt_num) {
2705                 if (name_only) {
2706                         printf("%s ", evt_list[evt_i++]);
2707                         continue;
2708                 }
2709                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2710                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2711         }
2712         if (evt_num && pager_in_use())
2713                 printf("\n");
2714
2715 out_free:
2716         evt_num = evt_i;
2717         for (evt_i = 0; evt_i < evt_num; evt_i++)
2718                 zfree(&evt_list[evt_i]);
2719         zfree(&evt_list);
2720         return evt_num;
2721
2722 out_enomem:
2723         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2724         if (evt_list)
2725                 goto out_free;
2726         return evt_num;
2727 }
2728
2729 static void print_tool_event(const char *name, const char *event_glob,
2730                              bool name_only)
2731 {
2732         if (event_glob && !strglobmatch(name, event_glob))
2733                 return;
2734         if (name_only)
2735                 printf("%s ", name);
2736         else
2737                 printf("  %-50s [%s]\n", name, "Tool event");
2738
2739 }
2740
2741 void print_tool_events(const char *event_glob, bool name_only)
2742 {
2743         print_tool_event("duration_time", event_glob, name_only);
2744         if (pager_in_use())
2745                 printf("\n");
2746 }
2747
2748 void print_symbol_events(const char *event_glob, unsigned type,
2749                                 struct event_symbol *syms, unsigned max,
2750                                 bool name_only)
2751 {
2752         unsigned int i, evt_i = 0, evt_num = 0;
2753         char name[MAX_NAME_LEN];
2754         char **evt_list = NULL;
2755         bool evt_num_known = false;
2756
2757 restart:
2758         if (evt_num_known) {
2759                 evt_list = zalloc(sizeof(char *) * evt_num);
2760                 if (!evt_list)
2761                         goto out_enomem;
2762                 syms -= max;
2763         }
2764
2765         for (i = 0; i < max; i++, syms++) {
2766
2767                 if (event_glob != NULL && syms->symbol != NULL &&
2768                     !(strglobmatch(syms->symbol, event_glob) ||
2769                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2770                         continue;
2771
2772                 if (!is_event_supported(type, i))
2773                         continue;
2774
2775                 if (!evt_num_known) {
2776                         evt_num++;
2777                         continue;
2778                 }
2779
2780                 if (!name_only && strlen(syms->alias))
2781                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2782                 else
2783                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2784
2785                 evt_list[evt_i] = strdup(name);
2786                 if (evt_list[evt_i] == NULL)
2787                         goto out_enomem;
2788                 evt_i++;
2789         }
2790
2791         if (!evt_num_known) {
2792                 evt_num_known = true;
2793                 goto restart;
2794         }
2795         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2796         evt_i = 0;
2797         while (evt_i < evt_num) {
2798                 if (name_only) {
2799                         printf("%s ", evt_list[evt_i++]);
2800                         continue;
2801                 }
2802                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2803         }
2804         if (evt_num && pager_in_use())
2805                 printf("\n");
2806
2807 out_free:
2808         evt_num = evt_i;
2809         for (evt_i = 0; evt_i < evt_num; evt_i++)
2810                 zfree(&evt_list[evt_i]);
2811         zfree(&evt_list);
2812         return;
2813
2814 out_enomem:
2815         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2816         if (evt_list)
2817                 goto out_free;
2818 }
2819
2820 /*
2821  * Print the help text for the event symbols:
2822  */
2823 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2824                         bool long_desc, bool details_flag, bool deprecated)
2825 {
2826         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2827                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2828
2829         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2830                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2831         print_tool_events(event_glob, name_only);
2832
2833         print_hwcache_events(event_glob, name_only);
2834
2835         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2836                         details_flag, deprecated);
2837
2838         if (event_glob != NULL)
2839                 return;
2840
2841         if (!name_only) {
2842                 printf("  %-50s [%s]\n",
2843                        "rNNN",
2844                        event_type_descriptors[PERF_TYPE_RAW]);
2845                 printf("  %-50s [%s]\n",
2846                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2847                        event_type_descriptors[PERF_TYPE_RAW]);
2848                 if (pager_in_use())
2849                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2850
2851                 printf("  %-50s [%s]\n",
2852                        "mem:<addr>[/len][:access]",
2853                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2854                 if (pager_in_use())
2855                         printf("\n");
2856         }
2857
2858         print_tracepoint_events(NULL, NULL, name_only);
2859
2860         print_sdt_events(NULL, NULL, name_only);
2861
2862         metricgroup__print(true, true, NULL, name_only, details_flag);
2863
2864         print_libpfm_events(name_only, long_desc);
2865 }
2866
2867 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2868 {
2869         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2870 }
2871
2872 static int new_term(struct parse_events_term **_term,
2873                     struct parse_events_term *temp,
2874                     char *str, u64 num)
2875 {
2876         struct parse_events_term *term;
2877
2878         term = malloc(sizeof(*term));
2879         if (!term)
2880                 return -ENOMEM;
2881
2882         *term = *temp;
2883         INIT_LIST_HEAD(&term->list);
2884         term->weak = false;
2885
2886         switch (term->type_val) {
2887         case PARSE_EVENTS__TERM_TYPE_NUM:
2888                 term->val.num = num;
2889                 break;
2890         case PARSE_EVENTS__TERM_TYPE_STR:
2891                 term->val.str = str;
2892                 break;
2893         default:
2894                 free(term);
2895                 return -EINVAL;
2896         }
2897
2898         *_term = term;
2899         return 0;
2900 }
2901
2902 int parse_events_term__num(struct parse_events_term **term,
2903                            int type_term, char *config, u64 num,
2904                            bool no_value,
2905                            void *loc_term_, void *loc_val_)
2906 {
2907         YYLTYPE *loc_term = loc_term_;
2908         YYLTYPE *loc_val = loc_val_;
2909
2910         struct parse_events_term temp = {
2911                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2912                 .type_term = type_term,
2913                 .config    = config,
2914                 .no_value  = no_value,
2915                 .err_term  = loc_term ? loc_term->first_column : 0,
2916                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2917         };
2918
2919         return new_term(term, &temp, NULL, num);
2920 }
2921
2922 int parse_events_term__str(struct parse_events_term **term,
2923                            int type_term, char *config, char *str,
2924                            void *loc_term_, void *loc_val_)
2925 {
2926         YYLTYPE *loc_term = loc_term_;
2927         YYLTYPE *loc_val = loc_val_;
2928
2929         struct parse_events_term temp = {
2930                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2931                 .type_term = type_term,
2932                 .config    = config,
2933                 .err_term  = loc_term ? loc_term->first_column : 0,
2934                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2935         };
2936
2937         return new_term(term, &temp, str, 0);
2938 }
2939
2940 int parse_events_term__sym_hw(struct parse_events_term **term,
2941                               char *config, unsigned idx)
2942 {
2943         struct event_symbol *sym;
2944         char *str;
2945         struct parse_events_term temp = {
2946                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2947                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2948                 .config    = config,
2949         };
2950
2951         if (!temp.config) {
2952                 temp.config = strdup("event");
2953                 if (!temp.config)
2954                         return -ENOMEM;
2955         }
2956         BUG_ON(idx >= PERF_COUNT_HW_MAX);
2957         sym = &event_symbols_hw[idx];
2958
2959         str = strdup(sym->symbol);
2960         if (!str)
2961                 return -ENOMEM;
2962         return new_term(term, &temp, str, 0);
2963 }
2964
2965 int parse_events_term__clone(struct parse_events_term **new,
2966                              struct parse_events_term *term)
2967 {
2968         char *str;
2969         struct parse_events_term temp = {
2970                 .type_val  = term->type_val,
2971                 .type_term = term->type_term,
2972                 .config    = NULL,
2973                 .err_term  = term->err_term,
2974                 .err_val   = term->err_val,
2975         };
2976
2977         if (term->config) {
2978                 temp.config = strdup(term->config);
2979                 if (!temp.config)
2980                         return -ENOMEM;
2981         }
2982         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
2983                 return new_term(new, &temp, NULL, term->val.num);
2984
2985         str = strdup(term->val.str);
2986         if (!str)
2987                 return -ENOMEM;
2988         return new_term(new, &temp, str, 0);
2989 }
2990
2991 void parse_events_term__delete(struct parse_events_term *term)
2992 {
2993         if (term->array.nr_ranges)
2994                 zfree(&term->array.ranges);
2995
2996         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
2997                 zfree(&term->val.str);
2998
2999         zfree(&term->config);
3000         free(term);
3001 }
3002
3003 int parse_events_copy_term_list(struct list_head *old,
3004                                  struct list_head **new)
3005 {
3006         struct parse_events_term *term, *n;
3007         int ret;
3008
3009         if (!old) {
3010                 *new = NULL;
3011                 return 0;
3012         }
3013
3014         *new = malloc(sizeof(struct list_head));
3015         if (!*new)
3016                 return -ENOMEM;
3017         INIT_LIST_HEAD(*new);
3018
3019         list_for_each_entry (term, old, list) {
3020                 ret = parse_events_term__clone(&n, term);
3021                 if (ret)
3022                         return ret;
3023                 list_add_tail(&n->list, *new);
3024         }
3025         return 0;
3026 }
3027
3028 void parse_events_terms__purge(struct list_head *terms)
3029 {
3030         struct parse_events_term *term, *h;
3031
3032         list_for_each_entry_safe(term, h, terms, list) {
3033                 list_del_init(&term->list);
3034                 parse_events_term__delete(term);
3035         }
3036 }
3037
3038 void parse_events_terms__delete(struct list_head *terms)
3039 {
3040         if (!terms)
3041                 return;
3042         parse_events_terms__purge(terms);
3043         free(terms);
3044 }
3045
3046 void parse_events__clear_array(struct parse_events_array *a)
3047 {
3048         zfree(&a->ranges);
3049 }
3050
3051 void parse_events_evlist_error(struct parse_events_state *parse_state,
3052                                int idx, const char *str)
3053 {
3054         if (!parse_state->error)
3055                 return;
3056
3057         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3058 }
3059
3060 static void config_terms_list(char *buf, size_t buf_sz)
3061 {
3062         int i;
3063         bool first = true;
3064
3065         buf[0] = '\0';
3066         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3067                 const char *name = config_term_names[i];
3068
3069                 if (!config_term_avail(i, NULL))
3070                         continue;
3071                 if (!name)
3072                         continue;
3073                 if (name[0] == '<')
3074                         continue;
3075
3076                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3077                         return;
3078
3079                 if (!first)
3080                         strcat(buf, ",");
3081                 else
3082                         first = false;
3083                 strcat(buf, name);
3084         }
3085 }
3086
3087 /*
3088  * Return string contains valid config terms of an event.
3089  * @additional_terms: For terms such as PMU sysfs terms.
3090  */
3091 char *parse_events_formats_error_string(char *additional_terms)
3092 {
3093         char *str;
3094         /* "no-overwrite" is the longest name */
3095         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3096                           (sizeof("no-overwrite") - 1)];
3097
3098         config_terms_list(static_terms, sizeof(static_terms));
3099         /* valid terms */
3100         if (additional_terms) {
3101                 if (asprintf(&str, "valid terms: %s,%s",
3102                              additional_terms, static_terms) < 0)
3103                         goto fail;
3104         } else {
3105                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3106                         goto fail;
3107         }
3108         return str;
3109
3110 fail:
3111         return NULL;
3112 }