tools/perf/util/parse-events.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hw_breakpoint.h>
   3 #include <linux/err.h>
   4 #include <linux/zalloc.h>
   5 #include <dirent.h>
   6 #include <errno.h>
   7 #include <sys/ioctl.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <sys/param.h>
  12 #include "term.h"
  13 #include "build-id.h"
  14 #include "evlist.h"
  15 #include "evsel.h"
  16 #include <subcmd/pager.h>
  17 #include <subcmd/parse-options.h>
  18 #include "parse-events.h"
  19 #include <subcmd/exec-cmd.h>
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "symbol.h"
  23 #include "header.h"
  24 #include "bpf-loader.h"
  25 #include "debug.h"
  26 #include <api/fs/tracing_path.h>
  27 #include <perf/cpumap.h>
  28 #include "parse-events-bison.h"
  29 #define YY_EXTRA_TYPE void*
  30 #include "parse-events-flex.h"
  31 #include "pmu.h"
  32 #include "thread_map.h"
  33 #include "probe-file.h"
  34 #include "asm/bug.h"
  35 #include "util/parse-branch-options.h"
  36 #include "metricgroup.h"
  37 #include "util/evsel_config.h"
  38 #include "util/event.h"
  39 #include "util/pfm.h"
  40 #include "perf.h"
  41
  42 #define MAX_NAME_LEN 100
  43
  44 #ifdef PARSER_DEBUG
  45 extern int parse_events_debug;
  46 #endif
  47 int parse_events_parse(void *parse_state, void *scanner);
  48 static int get_config_terms(struct list_head *head_config,
  49                             struct list_head *head_terms __maybe_unused);
  50
  51 static struct perf_pmu_event_symbol *perf_pmu_events_list;
  52 /*
  53  * The variable indicates the number of supported pmu event symbols.
  54  * 0 means not initialized and ready to init
  55  * -1 means failed to init, don't try anymore
  56  * >0 is the number of supported pmu event symbols
  57  */
  58 static int perf_pmu_events_list_num;
  59
  60 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  61         [PERF_COUNT_HW_CPU_CYCLES] = {
  62                 .symbol = "cpu-cycles",
  63                 .alias  = "cycles",
  64         },
  65         [PERF_COUNT_HW_INSTRUCTIONS] = {
  66                 .symbol = "instructions",
  67                 .alias  = "",
  68         },
  69         [PERF_COUNT_HW_CACHE_REFERENCES] = {
  70                 .symbol = "cache-references",
  71                 .alias  = "",
  72         },
  73         [PERF_COUNT_HW_CACHE_MISSES] = {
  74                 .symbol = "cache-misses",
  75                 .alias  = "",
  76         },
  77         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  78                 .symbol = "branch-instructions",
  79                 .alias  = "branches",
  80         },
  81         [PERF_COUNT_HW_BRANCH_MISSES] = {
  82                 .symbol = "branch-misses",
  83                 .alias  = "",
  84         },
  85         [PERF_COUNT_HW_BUS_CYCLES] = {
  86                 .symbol = "bus-cycles",
  87                 .alias  = "",
  88         },
  89         [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  90                 .symbol = "stalled-cycles-frontend",
  91                 .alias  = "idle-cycles-frontend",
  92         },
  93         [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  94                 .symbol = "stalled-cycles-backend",
  95                 .alias  = "idle-cycles-backend",
  96         },
  97         [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  98                 .symbol = "ref-cycles",
  99                 .alias  = "",
 100         },
 101 };
 102
 103 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 104         [PERF_COUNT_SW_CPU_CLOCK] = {
 105                 .symbol = "cpu-clock",
 106                 .alias  = "",
 107         },
 108         [PERF_COUNT_SW_TASK_CLOCK] = {
 109                 .symbol = "task-clock",
 110                 .alias  = "",
 111         },
 112         [PERF_COUNT_SW_PAGE_FAULTS] = {
 113                 .symbol = "page-faults",
 114                 .alias  = "faults",
 115         },
 116         [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 117                 .symbol = "context-switches",
 118                 .alias  = "cs",
 119         },
 120         [PERF_COUNT_SW_CPU_MIGRATIONS] = {
 121                 .symbol = "cpu-migrations",
 122                 .alias  = "migrations",
 123         },
 124         [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 125                 .symbol = "minor-faults",
 126                 .alias  = "",
 127         },
 128         [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 129                 .symbol = "major-faults",
 130                 .alias  = "",
 131         },
 132         [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 133                 .symbol = "alignment-faults",
 134                 .alias  = "",
 135         },
 136         [PERF_COUNT_SW_EMULATION_FAULTS] = {
 137                 .symbol = "emulation-faults",
 138                 .alias  = "",
 139         },
 140         [PERF_COUNT_SW_DUMMY] = {
 141                 .symbol = "dummy",
 142                 .alias  = "",
 143         },
 144         [PERF_COUNT_SW_BPF_OUTPUT] = {
 145                 .symbol = "bpf-output",
 146                 .alias  = "",
 147         },
 148 };
 149
 150 #define __PERF_EVENT_FIELD(config, name) \
 151         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 152
 153 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 154 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 155 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 156 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 157
 158 #define for_each_subsystem(sys_dir, sys_dirent)                 \
 159         while ((sys_dirent = readdir(sys_dir)) != NULL)         \
 160                 if (sys_dirent->d_type == DT_DIR &&             \
 161                     (strcmp(sys_dirent->d_name, ".")) &&        \
 162                     (strcmp(sys_dirent->d_name, "..")))
 163
 164 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 165 {
 166         char evt_path[MAXPATHLEN];
 167         int fd;
 168
 169         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 170         fd = open(evt_path, O_RDONLY);
 171         if (fd < 0)
 172                 return -EINVAL;
 173         close(fd);
 174
 175         return 0;
 176 }
 177
 178 #define for_each_event(dir_path, evt_dir, evt_dirent)           \
 179         while ((evt_dirent = readdir(evt_dir)) != NULL)         \
 180                 if (evt_dirent->d_type == DT_DIR &&             \
 181                     (strcmp(evt_dirent->d_name, ".")) &&        \
 182                     (strcmp(evt_dirent->d_name, "..")) &&       \
 183                     (!tp_event_has_id(dir_path, evt_dirent)))
 184
 185 #define MAX_EVENT_LENGTH 512
 186
 187 void parse_events__handle_error(struct parse_events_error *err, int idx,
 188                                 char *str, char *help)
 189 {
 190         if (WARN(!str, "WARNING: failed to provide error string\n")) {
 191                 free(help);
 192                 return;
 193         }
 194         switch (err->num_errors) {
 195         case 0:
 196                 err->idx = idx;
 197                 err->str = str;
 198                 err->help = help;
 199                 break;
 200         case 1:
 201                 err->first_idx = err->idx;
 202                 err->idx = idx;
 203                 err->first_str = err->str;
 204                 err->str = str;
 205                 err->first_help = err->help;
 206                 err->help = help;
 207                 break;
 208         default:
 209                 pr_debug("Multiple errors dropping message: %s (%s)\n",
 210                         err->str, err->help);
 211                 free(err->str);
 212                 err->str = str;
 213                 free(err->help);
 214                 err->help = help;
 215                 break;
 216         }
 217         err->num_errors++;
 218 }
 219
 220 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 221 {
 222         struct tracepoint_path *path = NULL;
 223         DIR *sys_dir, *evt_dir;
 224         struct dirent *sys_dirent, *evt_dirent;
 225         char id_buf[24];
 226         int fd;
 227         u64 id;
 228         char evt_path[MAXPATHLEN];
 229         char *dir_path;
 230
 231         sys_dir = tracing_events__opendir();
 232         if (!sys_dir)
 233                 return NULL;
 234
 235         for_each_subsystem(sys_dir, sys_dirent) {
 236                 dir_path = get_events_file(sys_dirent->d_name);
 237                 if (!dir_path)
 238                         continue;
 239                 evt_dir = opendir(dir_path);
 240                 if (!evt_dir)
 241                         goto next;
 242
 243                 for_each_event(dir_path, evt_dir, evt_dirent) {
 244
 245                         scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 246                                   evt_dirent->d_name);
 247                         fd = open(evt_path, O_RDONLY);
 248                         if (fd < 0)
 249                                 continue;
 250                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 251                                 close(fd);
 252                                 continue;
 253                         }
 254                         close(fd);
 255                         id = atoll(id_buf);
 256                         if (id == config) {
 257                                 put_events_file(dir_path);
 258                                 closedir(evt_dir);
 259                                 closedir(sys_dir);
 260                                 path = zalloc(sizeof(*path));
 261                                 if (!path)
 262                                         return NULL;
 263                                 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
 264                                         free(path);
 265                                         return NULL;
 266                                 }
 267                                 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
 268                                         zfree(&path->system);
 269                                         free(path);
 270                                         return NULL;
 271                                 }
 272                                 return path;
 273                         }
 274                 }
 275                 closedir(evt_dir);
 276 next:
 277                 put_events_file(dir_path);
 278         }
 279
 280         closedir(sys_dir);
 281         return NULL;
 282 }
 283
 284 struct tracepoint_path *tracepoint_name_to_path(const char *name)
 285 {
 286         struct tracepoint_path *path = zalloc(sizeof(*path));
 287         char *str = strchr(name, ':');
 288
 289         if (path == NULL || str == NULL) {
 290                 free(path);
 291                 return NULL;
 292         }
 293
 294         path->system = strndup(name, str - name);
 295         path->name = strdup(str+1);
 296
 297         if (path->system == NULL || path->name == NULL) {
 298                 zfree(&path->system);
 299                 zfree(&path->name);
 300                 zfree(&path);
 301         }
 302
 303         return path;
 304 }
 305
 306 const char *event_type(int type)
 307 {
 308         switch (type) {
 309         case PERF_TYPE_HARDWARE:
 310                 return "hardware";
 311
 312         case PERF_TYPE_SOFTWARE:
 313                 return "software";
 314
 315         case PERF_TYPE_TRACEPOINT:
 316                 return "tracepoint";
 317
 318         case PERF_TYPE_HW_CACHE:
 319                 return "hardware-cache";
 320
 321         default:
 322                 break;
 323         }
 324
 325         return "unknown";
 326 }
 327
 328 static int parse_events__is_name_term(struct parse_events_term *term)
 329 {
 330         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 331 }
 332
 333 static char *get_config_name(struct list_head *head_terms)
 334 {
 335         struct parse_events_term *term;
 336
 337         if (!head_terms)
 338                 return NULL;
 339
 340         list_for_each_entry(term, head_terms, list)
 341                 if (parse_events__is_name_term(term))
 342                         return term->val.str;
 343
 344         return NULL;
 345 }
 346
 347 static struct evsel *
 348 __add_event(struct list_head *list, int *idx,
 349             struct perf_event_attr *attr,
 350             bool init_attr,
 351             char *name, struct perf_pmu *pmu,
 352             struct list_head *config_terms, bool auto_merge_stats,
 353             const char *cpu_list)
 354 {
 355         struct evsel *evsel;
 356         struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
 357                                cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 358
 359         if (pmu && attr->type == PERF_TYPE_RAW)
 360                 perf_pmu__warn_invalid_config(pmu, attr->config, name);
 361
 362         if (init_attr)
 363                 event_attr_init(attr);
 364
 365         evsel = evsel__new_idx(attr, *idx);
 366         if (!evsel) {
 367                 perf_cpu_map__put(cpus);
 368                 return NULL;
 369         }
 370
 371         (*idx)++;
 372         evsel->core.cpus = cpus;
 373         evsel->core.own_cpus = perf_cpu_map__get(cpus);
 374         evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 375         evsel->auto_merge_stats = auto_merge_stats;
 376
 377         if (name)
 378                 evsel->name = strdup(name);
 379
 380         if (config_terms)
 381                 list_splice(config_terms, &evsel->config_terms);
 382
 383         if (list)
 384                 list_add_tail(&evsel->core.node, list);
 385
 386         return evsel;
 387 }
 388
 389 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
 390                                         char *name, struct perf_pmu *pmu)
 391 {
 392         return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
 393                            NULL);
 394 }
 395
 396 static int add_event(struct list_head *list, int *idx,
 397                      struct perf_event_attr *attr, char *name,
 398                      struct list_head *config_terms)
 399 {
 400         return __add_event(list, idx, attr, true, name, NULL, config_terms,
 401                            false, NULL) ? 0 : -ENOMEM;
 402 }
 403
 404 static int add_event_tool(struct list_head *list, int *idx,
 405                           enum perf_tool_event tool_event)
 406 {
 407         struct evsel *evsel;
 408         struct perf_event_attr attr = {
 409                 .type = PERF_TYPE_SOFTWARE,
 410                 .config = PERF_COUNT_SW_DUMMY,
 411         };
 412
 413         evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
 414                             "0");
 415         if (!evsel)
 416                 return -ENOMEM;
 417         evsel->tool_event = tool_event;
 418         if (tool_event == PERF_TOOL_DURATION_TIME)
 419                 evsel->unit = "ns";
 420         return 0;
 421 }
 422
 423 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
 424 {
 425         int i, j;
 426         int n, longest = -1;
 427
 428         for (i = 0; i < size; i++) {
 429                 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
 430                         n = strlen(names[i][j]);
 431                         if (n > longest && !strncasecmp(str, names[i][j], n))
 432                                 longest = n;
 433                 }
 434                 if (longest > 0)
 435                         return i;
 436         }
 437
 438         return -1;
 439 }
 440
 441 typedef int config_term_func_t(struct perf_event_attr *attr,
 442                                struct parse_events_term *term,
 443                                struct parse_events_error *err);
 444 static int config_term_common(struct perf_event_attr *attr,
 445                               struct parse_events_term *term,
 446                               struct parse_events_error *err);
 447 static int config_attr(struct perf_event_attr *attr,
 448                        struct list_head *head,
 449                        struct parse_events_error *err,
 450                        config_term_func_t config_term);
 451
 452 int parse_events_add_cache(struct list_head *list, int *idx,
 453                            char *type, char *op_result1, char *op_result2,
 454                            struct parse_events_error *err,
 455                            struct list_head *head_config)
 456 {
 457         struct perf_event_attr attr;
 458         LIST_HEAD(config_terms);
 459         char name[MAX_NAME_LEN], *config_name;
 460         int cache_type = -1, cache_op = -1, cache_result = -1;
 461         char *op_result[2] = { op_result1, op_result2 };
 462         int i, n;
 463
 464         /*
 465          * No fallback - if we cannot get a clear cache type
 466          * then bail out:
 467          */
 468         cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
 469         if (cache_type == -1)
 470                 return -EINVAL;
 471
 472         config_name = get_config_name(head_config);
 473         n = snprintf(name, MAX_NAME_LEN, "%s", type);
 474
 475         for (i = 0; (i < 2) && (op_result[i]); i++) {
 476                 char *str = op_result[i];
 477
 478                 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 479
 480                 if (cache_op == -1) {
 481                         cache_op = parse_aliases(str, evsel__hw_cache_op,
 482                                                  PERF_COUNT_HW_CACHE_OP_MAX);
 483                         if (cache_op >= 0) {
 484                                 if (!evsel__is_cache_op_valid(cache_type, cache_op))
 485                                         return -EINVAL;
 486                                 continue;
 487                         }
 488                 }
 489
 490                 if (cache_result == -1) {
 491                         cache_result = parse_aliases(str, evsel__hw_cache_result,
 492                                                      PERF_COUNT_HW_CACHE_RESULT_MAX);
 493                         if (cache_result >= 0)
 494                                 continue;
 495                 }
 496         }
 497
 498         /*
 499          * Fall back to reads:
 500          */
 501         if (cache_op == -1)
 502                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 503
 504         /*
 505          * Fall back to accesses:
 506          */
 507         if (cache_result == -1)
 508                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 509
 510         memset(&attr, 0, sizeof(attr));
 511         attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 512         attr.type = PERF_TYPE_HW_CACHE;
 513
 514         if (head_config) {
 515                 if (config_attr(&attr, head_config, err,
 516                                 config_term_common))
 517                         return -EINVAL;
 518
 519                 if (get_config_terms(head_config, &config_terms))
 520                         return -ENOMEM;
 521         }
 522         return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 523 }
 524
 525 static void tracepoint_error(struct parse_events_error *e, int err,
 526                              const char *sys, const char *name)
 527 {
 528         const char *str;
 529         char help[BUFSIZ];
 530
 531         if (!e)
 532                 return;
 533
 534         /*
 535          * We get error directly from syscall errno ( > 0),
 536          * or from encoded pointer's error ( < 0).
 537          */
 538         err = abs(err);
 539
 540         switch (err) {
 541         case EACCES:
 542                 str = "can't access trace events";
 543                 break;
 544         case ENOENT:
 545                 str = "unknown tracepoint";
 546                 break;
 547         default:
 548                 str = "failed to add tracepoint";
 549                 break;
 550         }
 551
 552         tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 553         parse_events__handle_error(e, 0, strdup(str), strdup(help));
 554 }
 555
 556 static int add_tracepoint(struct list_head *list, int *idx,
 557                           const char *sys_name, const char *evt_name,
 558                           struct parse_events_error *err,
 559                           struct list_head *head_config)
 560 {
 561         struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 562
 563         if (IS_ERR(evsel)) {
 564                 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 565                 return PTR_ERR(evsel);
 566         }
 567
 568         if (head_config) {
 569                 LIST_HEAD(config_terms);
 570
 571                 if (get_config_terms(head_config, &config_terms))
 572                         return -ENOMEM;
 573                 list_splice(&config_terms, &evsel->config_terms);
 574         }
 575
 576         list_add_tail(&evsel->core.node, list);
 577         return 0;
 578 }
 579
 580 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 581                                       const char *sys_name, const char *evt_name,
 582                                       struct parse_events_error *err,
 583                                       struct list_head *head_config)
 584 {
 585         char *evt_path;
 586         struct dirent *evt_ent;
 587         DIR *evt_dir;
 588         int ret = 0, found = 0;
 589
 590         evt_path = get_events_file(sys_name);
 591         if (!evt_path) {
 592                 tracepoint_error(err, errno, sys_name, evt_name);
 593                 return -1;
 594         }
 595         evt_dir = opendir(evt_path);
 596         if (!evt_dir) {
 597                 put_events_file(evt_path);
 598                 tracepoint_error(err, errno, sys_name, evt_name);
 599                 return -1;
 600         }
 601
 602         while (!ret && (evt_ent = readdir(evt_dir))) {
 603                 if (!strcmp(evt_ent->d_name, ".")
 604                     || !strcmp(evt_ent->d_name, "..")
 605                     || !strcmp(evt_ent->d_name, "enable")
 606                     || !strcmp(evt_ent->d_name, "filter"))
 607                         continue;
 608
 609                 if (!strglobmatch(evt_ent->d_name, evt_name))
 610                         continue;
 611
 612                 found++;
 613
 614                 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 615                                      err, head_config);
 616         }
 617
 618         if (!found) {
 619                 tracepoint_error(err, ENOENT, sys_name, evt_name);
 620                 ret = -1;
 621         }
 622
 623         put_events_file(evt_path);
 624         closedir(evt_dir);
 625         return ret;
 626 }
 627
 628 static int add_tracepoint_event(struct list_head *list, int *idx,
 629                                 const char *sys_name, const char *evt_name,
 630                                 struct parse_events_error *err,
 631                                 struct list_head *head_config)
 632 {
 633         return strpbrk(evt_name, "*?") ?
 634                add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 635                                           err, head_config) :
 636                add_tracepoint(list, idx, sys_name, evt_name,
 637                               err, head_config);
 638 }
 639
 640 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 641                                     const char *sys_name, const char *evt_name,
 642                                     struct parse_events_error *err,
 643                                     struct list_head *head_config)
 644 {
 645         struct dirent *events_ent;
 646         DIR *events_dir;
 647         int ret = 0;
 648
 649         events_dir = tracing_events__opendir();
 650         if (!events_dir) {
 651                 tracepoint_error(err, errno, sys_name, evt_name);
 652                 return -1;
 653         }
 654
 655         while (!ret && (events_ent = readdir(events_dir))) {
 656                 if (!strcmp(events_ent->d_name, ".")
 657                     || !strcmp(events_ent->d_name, "..")
 658                     || !strcmp(events_ent->d_name, "enable")
 659                     || !strcmp(events_ent->d_name, "header_event")
 660                     || !strcmp(events_ent->d_name, "header_page"))
 661                         continue;
 662
 663                 if (!strglobmatch(events_ent->d_name, sys_name))
 664                         continue;
 665
 666                 ret = add_tracepoint_event(list, idx, events_ent->d_name,
 667                                            evt_name, err, head_config);
 668         }
 669
 670         closedir(events_dir);
 671         return ret;
 672 }
 673
 674 #ifdef HAVE_LIBBPF_SUPPORT
 675 struct __add_bpf_event_param {
 676         struct parse_events_state *parse_state;
 677         struct list_head *list;
 678         struct list_head *head_config;
 679 };
 680
 681 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 682                          void *_param)
 683 {
 684         LIST_HEAD(new_evsels);
 685         struct __add_bpf_event_param *param = _param;
 686         struct parse_events_state *parse_state = param->parse_state;
 687         struct list_head *list = param->list;
 688         struct evsel *pos;
 689         int err;
 690         /*
 691          * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 692          * then don't add the tracepoint, this will be used for something else, like
 693          * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 694          *
 695          * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 696          */
 697         if (group[0] == '!')
 698                 return 0;
 699
 700         pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 701                  group, event, fd);
 702
 703         err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 704                                           event, parse_state->error,
 705                                           param->head_config);
 706         if (err) {
 707                 struct evsel *evsel, *tmp;
 708
 709                 pr_debug("Failed to add BPF event %s:%s\n",
 710                          group, event);
 711                 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 712                         list_del_init(&evsel->core.node);
 713                         evsel__delete(evsel);
 714                 }
 715                 return err;
 716         }
 717         pr_debug("adding %s:%s\n", group, event);
 718
 719         list_for_each_entry(pos, &new_evsels, core.node) {
 720                 pr_debug("adding %s:%s to %p\n",
 721                          group, event, pos);
 722                 pos->bpf_fd = fd;
 723                 pos->bpf_obj = obj;
 724         }
 725         list_splice(&new_evsels, list);
 726         return 0;
 727 }
 728
 729 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 730                               struct list_head *list,
 731                               struct bpf_object *obj,
 732                               struct list_head *head_config)
 733 {
 734         int err;
 735         char errbuf[BUFSIZ];
 736         struct __add_bpf_event_param param = {parse_state, list, head_config};
 737         static bool registered_unprobe_atexit = false;
 738
 739         if (IS_ERR(obj) || !obj) {
 740                 snprintf(errbuf, sizeof(errbuf),
 741                          "Internal error: load bpf obj with NULL");
 742                 err = -EINVAL;
 743                 goto errout;
 744         }
 745
 746         /*
 747          * Register atexit handler before calling bpf__probe() so
 748          * bpf__probe() don't need to unprobe probe points its already
 749          * created when failure.
 750          */
 751         if (!registered_unprobe_atexit) {
 752                 atexit(bpf__clear);
 753                 registered_unprobe_atexit = true;
 754         }
 755
 756         err = bpf__probe(obj);
 757         if (err) {
 758                 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 759                 goto errout;
 760         }
 761
 762         err = bpf__load(obj);
 763         if (err) {
 764                 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 765                 goto errout;
 766         }
 767
 768         err = bpf__foreach_event(obj, add_bpf_event, &param);
 769         if (err) {
 770                 snprintf(errbuf, sizeof(errbuf),
 771                          "Attach events in BPF object failed");
 772                 goto errout;
 773         }
 774
 775         return 0;
 776 errout:
 777         parse_events__handle_error(parse_state->error, 0,
 778                                 strdup(errbuf), strdup("(add -v to see detail)"));
 779         return err;
 780 }
 781
 782 static int
 783 parse_events_config_bpf(struct parse_events_state *parse_state,
 784                         struct bpf_object *obj,
 785                         struct list_head *head_config)
 786 {
 787         struct parse_events_term *term;
 788         int error_pos;
 789
 790         if (!head_config || list_empty(head_config))
 791                 return 0;
 792
 793         list_for_each_entry(term, head_config, list) {
 794                 int err;
 795
 796                 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 797                         parse_events__handle_error(parse_state->error, term->err_term,
 798                                                 strdup("Invalid config term for BPF object"),
 799                                                 NULL);
 800                         return -EINVAL;
 801                 }
 802
 803                 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 804                 if (err) {
 805                         char errbuf[BUFSIZ];
 806                         int idx;
 807
 808                         bpf__strerror_config_obj(obj, term, parse_state->evlist,
 809                                                  &error_pos, err, errbuf,
 810                                                  sizeof(errbuf));
 811
 812                         if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 813                                 idx = term->err_val;
 814                         else
 815                                 idx = term->err_term + error_pos;
 816
 817                         parse_events__handle_error(parse_state->error, idx,
 818                                                 strdup(errbuf),
 819                                                 strdup(
 820 "Hint:\tValid config terms:\n"
 821 "     \tmap:[<arraymap>].value<indices>=[value]\n"
 822 "     \tmap:[<eventmap>].event<indices>=[event]\n"
 823 "\n"
 824 "     \twhere <indices> is something like [0,3...5] or [all]\n"
 825 "     \t(add -v to see detail)"));
 826                         return err;
 827                 }
 828         }
 829         return 0;
 830 }
 831
 832 /*
 833  * Split config terms:
 834  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 835  *  'call-graph=fp' is 'evt config', should be applied to each
 836  *  events in bpf.c.
 837  * 'map:array.value[0]=1' is 'obj config', should be processed
 838  * with parse_events_config_bpf.
 839  *
 840  * Move object config terms from the first list to obj_head_config.
 841  */
 842 static void
 843 split_bpf_config_terms(struct list_head *evt_head_config,
 844                        struct list_head *obj_head_config)
 845 {
 846         struct parse_events_term *term, *temp;
 847
 848         /*
 849          * Currently, all possible user config term
 850          * belong to bpf object. parse_events__is_hardcoded_term()
 851          * happens to be a good flag.
 852          *
 853          * See parse_events_config_bpf() and
 854          * config_term_tracepoint().
 855          */
 856         list_for_each_entry_safe(term, temp, evt_head_config, list)
 857                 if (!parse_events__is_hardcoded_term(term))
 858                         list_move_tail(&term->list, obj_head_config);
 859 }
 860
 861 int parse_events_load_bpf(struct parse_events_state *parse_state,
 862                           struct list_head *list,
 863                           char *bpf_file_name,
 864                           bool source,
 865                           struct list_head *head_config)
 866 {
 867         int err;
 868         struct bpf_object *obj;
 869         LIST_HEAD(obj_head_config);
 870
 871         if (head_config)
 872                 split_bpf_config_terms(head_config, &obj_head_config);
 873
 874         obj = bpf__prepare_load(bpf_file_name, source);
 875         if (IS_ERR(obj)) {
 876                 char errbuf[BUFSIZ];
 877
 878                 err = PTR_ERR(obj);
 879
 880                 if (err == -ENOTSUP)
 881                         snprintf(errbuf, sizeof(errbuf),
 882                                  "BPF support is not compiled");
 883                 else
 884                         bpf__strerror_prepare_load(bpf_file_name,
 885                                                    source,
 886                                                    -err, errbuf,
 887                                                    sizeof(errbuf));
 888
 889                 parse_events__handle_error(parse_state->error, 0,
 890                                         strdup(errbuf), strdup("(add -v to see detail)"));
 891                 return err;
 892         }
 893
 894         err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 895         if (err)
 896                 return err;
 897         err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 898
 899         /*
 900          * Caller doesn't know anything about obj_head_config,
 901          * so combine them together again before returning.
 902          */
 903         if (head_config)
 904                 list_splice_tail(&obj_head_config, head_config);
 905         return err;
 906 }
 907 #else // HAVE_LIBBPF_SUPPORT
 908 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 909                               struct list_head *list __maybe_unused,
 910                               struct bpf_object *obj __maybe_unused,
 911                               struct list_head *head_config __maybe_unused)
 912 {
 913         parse_events__handle_error(parse_state->error, 0,
 914                                    strdup("BPF support is not compiled"),
 915                                    strdup("Make sure libbpf-devel is available at build time."));
 916         return -ENOTSUP;
 917 }
 918
 919 int parse_events_load_bpf(struct parse_events_state *parse_state,
 920                           struct list_head *list __maybe_unused,
 921                           char *bpf_file_name __maybe_unused,
 922                           bool source __maybe_unused,
 923                           struct list_head *head_config __maybe_unused)
 924 {
 925         parse_events__handle_error(parse_state->error, 0,
 926                                    strdup("BPF support is not compiled"),
 927                                    strdup("Make sure libbpf-devel is available at build time."));
 928         return -ENOTSUP;
 929 }
 930 #endif // HAVE_LIBBPF_SUPPORT
 931
 932 static int
 933 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 934 {
 935         int i;
 936
 937         for (i = 0; i < 3; i++) {
 938                 if (!type || !type[i])
 939                         break;
 940
 941 #define CHECK_SET_TYPE(bit)             \
 942 do {                                    \
 943         if (attr->bp_type & bit)        \
 944                 return -EINVAL;         \
 945         else                            \
 946                 attr->bp_type |= bit;   \
 947 } while (0)
 948
 949                 switch (type[i]) {
 950                 case 'r':
 951                         CHECK_SET_TYPE(HW_BREAKPOINT_R);
 952                         break;
 953                 case 'w':
 954                         CHECK_SET_TYPE(HW_BREAKPOINT_W);
 955                         break;
 956                 case 'x':
 957                         CHECK_SET_TYPE(HW_BREAKPOINT_X);
 958                         break;
 959                 default:
 960                         return -EINVAL;
 961                 }
 962         }
 963
 964 #undef CHECK_SET_TYPE
 965
 966         if (!attr->bp_type) /* Default */
 967                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 968
 969         return 0;
 970 }
 971
 972 int parse_events_add_breakpoint(struct list_head *list, int *idx,
 973                                 u64 addr, char *type, u64 len)
 974 {
 975         struct perf_event_attr attr;
 976
 977         memset(&attr, 0, sizeof(attr));
 978         attr.bp_addr = addr;
 979
 980         if (parse_breakpoint_type(type, &attr))
 981                 return -EINVAL;
 982
 983         /* Provide some defaults if len is not specified */
 984         if (!len) {
 985                 if (attr.bp_type == HW_BREAKPOINT_X)
 986                         len = sizeof(long);
 987                 else
 988                         len = HW_BREAKPOINT_LEN_4;
 989         }
 990
 991         attr.bp_len = len;
 992
 993         attr.type = PERF_TYPE_BREAKPOINT;
 994         attr.sample_period = 1;
 995
 996         return add_event(list, idx, &attr, NULL, NULL);
 997 }
 998
 999 static int check_type_val(struct parse_events_term *term,
1000                           struct parse_events_error *err,
1001                           int type)
1002 {
1003         if (type == term->type_val)
1004                 return 0;
1005
1006         if (err) {
1007                 parse_events__handle_error(err, term->err_val,
1008                                         type == PARSE_EVENTS__TERM_TYPE_NUM
1009                                         ? strdup("expected numeric value")
1010                                         : strdup("expected string value"),
1011                                         NULL);
1012         }
1013         return -EINVAL;
1014 }
1015
1016 /*
1017  * Update according to parse-events.l
1018  */
1019 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1020         [PARSE_EVENTS__TERM_TYPE_USER]                  = "<sysfs term>",
1021         [PARSE_EVENTS__TERM_TYPE_CONFIG]                = "config",
1022         [PARSE_EVENTS__TERM_TYPE_CONFIG1]               = "config1",
1023         [PARSE_EVENTS__TERM_TYPE_CONFIG2]               = "config2",
1024         [PARSE_EVENTS__TERM_TYPE_NAME]                  = "name",
1025         [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]         = "period",
1026         [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]           = "freq",
1027         [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]    = "branch_type",
1028         [PARSE_EVENTS__TERM_TYPE_TIME]                  = "time",
1029         [PARSE_EVENTS__TERM_TYPE_CALLGRAPH]             = "call-graph",
1030         [PARSE_EVENTS__TERM_TYPE_STACKSIZE]             = "stack-size",
1031         [PARSE_EVENTS__TERM_TYPE_NOINHERIT]             = "no-inherit",
1032         [PARSE_EVENTS__TERM_TYPE_INHERIT]               = "inherit",
1033         [PARSE_EVENTS__TERM_TYPE_MAX_STACK]             = "max-stack",
1034         [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]            = "nr",
1035         [PARSE_EVENTS__TERM_TYPE_OVERWRITE]             = "overwrite",
1036         [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]           = "no-overwrite",
1037         [PARSE_EVENTS__TERM_TYPE_DRV_CFG]               = "driver-config",
1038         [PARSE_EVENTS__TERM_TYPE_PERCORE]               = "percore",
1039         [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]            = "aux-output",
1040         [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]       = "aux-sample-size",
1041 };
1042
1043 static bool config_term_shrinked;
1044
1045 static bool
1046 config_term_avail(int term_type, struct parse_events_error *err)
1047 {
1048         char *err_str;
1049
1050         if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1051                 parse_events__handle_error(err, -1,
1052                                         strdup("Invalid term_type"), NULL);
1053                 return false;
1054         }
1055         if (!config_term_shrinked)
1056                 return true;
1057
1058         switch (term_type) {
1059         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1060         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1061         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1062         case PARSE_EVENTS__TERM_TYPE_NAME:
1063         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1064         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1065                 return true;
1066         default:
1067                 if (!err)
1068                         return false;
1069
1070                 /* term_type is validated so indexing is safe */
1071                 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1072                                 config_term_names[term_type]) >= 0)
1073                         parse_events__handle_error(err, -1, err_str, NULL);
1074                 return false;
1075         }
1076 }
1077
1078 void parse_events__shrink_config_terms(void)
1079 {
1080         config_term_shrinked = true;
1081 }
1082
1083 static int config_term_common(struct perf_event_attr *attr,
1084                               struct parse_events_term *term,
1085                               struct parse_events_error *err)
1086 {
1087 #define CHECK_TYPE_VAL(type)                                               \
1088 do {                                                                       \
1089         if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1090                 return -EINVAL;                                            \
1091 } while (0)
1092
1093         switch (term->type_term) {
1094         case PARSE_EVENTS__TERM_TYPE_CONFIG:
1095                 CHECK_TYPE_VAL(NUM);
1096                 attr->config = term->val.num;
1097                 break;
1098         case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1099                 CHECK_TYPE_VAL(NUM);
1100                 attr->config1 = term->val.num;
1101                 break;
1102         case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1103                 CHECK_TYPE_VAL(NUM);
1104                 attr->config2 = term->val.num;
1105                 break;
1106         case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1107                 CHECK_TYPE_VAL(NUM);
1108                 break;
1109         case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1110                 CHECK_TYPE_VAL(NUM);
1111                 break;
1112         case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1113                 CHECK_TYPE_VAL(STR);
1114                 if (strcmp(term->val.str, "no") &&
1115                     parse_branch_str(term->val.str,
1116                                     &attr->branch_sample_type)) {
1117                         parse_events__handle_error(err, term->err_val,
1118                                         strdup("invalid branch sample type"),
1119                                         NULL);
1120                         return -EINVAL;
1121                 }
1122                 break;
1123         case PARSE_EVENTS__TERM_TYPE_TIME:
1124                 CHECK_TYPE_VAL(NUM);
1125                 if (term->val.num > 1) {
1126                         parse_events__handle_error(err, term->err_val,
1127                                                 strdup("expected 0 or 1"),
1128                                                 NULL);
1129                         return -EINVAL;
1130                 }
1131                 break;
1132         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1133                 CHECK_TYPE_VAL(STR);
1134                 break;
1135         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1136                 CHECK_TYPE_VAL(NUM);
1137                 break;
1138         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1139                 CHECK_TYPE_VAL(NUM);
1140                 break;
1141         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1142                 CHECK_TYPE_VAL(NUM);
1143                 break;
1144         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1145                 CHECK_TYPE_VAL(NUM);
1146                 break;
1147         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1148                 CHECK_TYPE_VAL(NUM);
1149                 break;
1150         case PARSE_EVENTS__TERM_TYPE_NAME:
1151                 CHECK_TYPE_VAL(STR);
1152                 break;
1153         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1154                 CHECK_TYPE_VAL(NUM);
1155                 break;
1156         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1157                 CHECK_TYPE_VAL(NUM);
1158                 break;
1159         case PARSE_EVENTS__TERM_TYPE_PERCORE:
1160                 CHECK_TYPE_VAL(NUM);
1161                 if ((unsigned int)term->val.num > 1) {
1162                         parse_events__handle_error(err, term->err_val,
1163                                                 strdup("expected 0 or 1"),
1164                                                 NULL);
1165                         return -EINVAL;
1166                 }
1167                 break;
1168         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1169                 CHECK_TYPE_VAL(NUM);
1170                 break;
1171         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1172                 CHECK_TYPE_VAL(NUM);
1173                 if (term->val.num > UINT_MAX) {
1174                         parse_events__handle_error(err, term->err_val,
1175                                                 strdup("too big"),
1176                                                 NULL);
1177                         return -EINVAL;
1178                 }
1179                 break;
1180         default:
1181                 parse_events__handle_error(err, term->err_term,
1182                                 strdup("unknown term"),
1183                                 parse_events_formats_error_string(NULL));
1184                 return -EINVAL;
1185         }
1186
1187         /*
1188          * Check term availability after basic checking so
1189          * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1190          *
1191          * If check availability at the entry of this function,
1192          * user will see "'<sysfs term>' is not usable in 'perf stat'"
1193          * if an invalid config term is provided for legacy events
1194          * (for example, instructions/badterm/...), which is confusing.
1195          */
1196         if (!config_term_avail(term->type_term, err))
1197                 return -EINVAL;
1198         return 0;
1199 #undef CHECK_TYPE_VAL
1200 }
1201
1202 static int config_term_pmu(struct perf_event_attr *attr,
1203                            struct parse_events_term *term,
1204                            struct parse_events_error *err)
1205 {
1206         if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1207             term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1208                 /*
1209                  * Always succeed for sysfs terms, as we dont know
1210                  * at this point what type they need to have.
1211                  */
1212                 return 0;
1213         else
1214                 return config_term_common(attr, term, err);
1215 }
1216
1217 static int config_term_tracepoint(struct perf_event_attr *attr,
1218                                   struct parse_events_term *term,
1219                                   struct parse_events_error *err)
1220 {
1221         switch (term->type_term) {
1222         case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1223         case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1224         case PARSE_EVENTS__TERM_TYPE_INHERIT:
1225         case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1226         case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1227         case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1228         case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1229         case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1230         case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1231         case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1232                 return config_term_common(attr, term, err);
1233         default:
1234                 if (err) {
1235                         parse_events__handle_error(err, term->err_term,
1236                                 strdup("unknown term"),
1237                                 strdup("valid terms: call-graph,stack-size\n"));
1238                 }
1239                 return -EINVAL;
1240         }
1241
1242         return 0;
1243 }
1244
1245 static int config_attr(struct perf_event_attr *attr,
1246                        struct list_head *head,
1247                        struct parse_events_error *err,
1248                        config_term_func_t config_term)
1249 {
1250         struct parse_events_term *term;
1251
1252         list_for_each_entry(term, head, list)
1253                 if (config_term(attr, term, err))
1254                         return -EINVAL;
1255
1256         return 0;
1257 }
1258
1259 static int get_config_terms(struct list_head *head_config,
1260                             struct list_head *head_terms __maybe_unused)
1261 {
1262 #define ADD_CONFIG_TERM(__type, __weak)                         \
1263         struct evsel_config_term *__t;                  \
1264                                                                 \
1265         __t = zalloc(sizeof(*__t));                             \
1266         if (!__t)                                               \
1267                 return -ENOMEM;                                 \
1268                                                                 \
1269         INIT_LIST_HEAD(&__t->list);                             \
1270         __t->type       = EVSEL__CONFIG_TERM_ ## __type;        \
1271         __t->weak       = __weak;                               \
1272         list_add_tail(&__t->list, head_terms)
1273
1274 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)      \
1275 do {                                                            \
1276         ADD_CONFIG_TERM(__type, __weak);                        \
1277         __t->val.__name = __val;                                \
1278 } while (0)
1279
1280 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)              \
1281 do {                                                            \
1282         ADD_CONFIG_TERM(__type, __weak);                        \
1283         __t->val.str = strdup(__val);                           \
1284         if (!__t->val.str) {                                    \
1285                 zfree(&__t);                                    \
1286                 return -ENOMEM;                                 \
1287         }                                                       \
1288         __t->free_str = true;                                   \
1289 } while (0)
1290
1291         struct parse_events_term *term;
1292
1293         list_for_each_entry(term, head_config, list) {
1294                 switch (term->type_term) {
1295                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1296                         ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1297                         break;
1298                 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1299                         ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1300                         break;
1301                 case PARSE_EVENTS__TERM_TYPE_TIME:
1302                         ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1303                         break;
1304                 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1305                         ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1306                         break;
1307                 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1308                         ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1309                         break;
1310                 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1311                         ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1312                                             term->val.num, term->weak);
1313                         break;
1314                 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1315                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1316                                             term->val.num ? 1 : 0, term->weak);
1317                         break;
1318                 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1319                         ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1320                                             term->val.num ? 0 : 1, term->weak);
1321                         break;
1322                 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1323                         ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1324                                             term->val.num, term->weak);
1325                         break;
1326                 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1327                         ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1328                                             term->val.num, term->weak);
1329                         break;
1330                 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1331                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1332                                             term->val.num ? 1 : 0, term->weak);
1333                         break;
1334                 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1335                         ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1336                                             term->val.num ? 0 : 1, term->weak);
1337                         break;
1338                 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1339                         ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1340                         break;
1341                 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1342                         ADD_CONFIG_TERM_VAL(PERCORE, percore,
1343                                             term->val.num ? true : false, term->weak);
1344                         break;
1345                 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1346                         ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1347                                             term->val.num ? 1 : 0, term->weak);
1348                         break;
1349                 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1350                         ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1351                                             term->val.num, term->weak);
1352                         break;
1353                 default:
1354                         break;
1355                 }
1356         }
1357         return 0;
1358 }
1359
1360 /*
1361  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1362  * each bit of attr->config that the user has changed.
1363  */
1364 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1365                            struct list_head *head_terms)
1366 {
1367         struct parse_events_term *term;
1368         u64 bits = 0;
1369         int type;
1370
1371         list_for_each_entry(term, head_config, list) {
1372                 switch (term->type_term) {
1373                 case PARSE_EVENTS__TERM_TYPE_USER:
1374                         type = perf_pmu__format_type(&pmu->format, term->config);
1375                         if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1376                                 continue;
1377                         bits |= perf_pmu__format_bits(&pmu->format, term->config);
1378                         break;
1379                 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1380                         bits = ~(u64)0;
1381                         break;
1382                 default:
1383                         break;
1384                 }
1385         }
1386
1387         if (bits)
1388                 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1389
1390 #undef ADD_CONFIG_TERM
1391         return 0;
1392 }
1393
1394 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1395                                 const char *sys, const char *event,
1396                                 struct parse_events_error *err,
1397                                 struct list_head *head_config)
1398 {
1399         if (head_config) {
1400                 struct perf_event_attr attr;
1401
1402                 if (config_attr(&attr, head_config, err,
1403                                 config_term_tracepoint))
1404                         return -EINVAL;
1405         }
1406
1407         if (strpbrk(sys, "*?"))
1408                 return add_tracepoint_multi_sys(list, idx, sys, event,
1409                                                 err, head_config);
1410         else
1411                 return add_tracepoint_event(list, idx, sys, event,
1412                                             err, head_config);
1413 }
1414
1415 int parse_events_add_numeric(struct parse_events_state *parse_state,
1416                              struct list_head *list,
1417                              u32 type, u64 config,
1418                              struct list_head *head_config)
1419 {
1420         struct perf_event_attr attr;
1421         LIST_HEAD(config_terms);
1422
1423         memset(&attr, 0, sizeof(attr));
1424         attr.type = type;
1425         attr.config = config;
1426
1427         if (head_config) {
1428                 if (config_attr(&attr, head_config, parse_state->error,
1429                                 config_term_common))
1430                         return -EINVAL;
1431
1432                 if (get_config_terms(head_config, &config_terms))
1433                         return -ENOMEM;
1434         }
1435
1436         return add_event(list, &parse_state->idx, &attr,
1437                          get_config_name(head_config), &config_terms);
1438 }
1439
1440 int parse_events_add_tool(struct parse_events_state *parse_state,
1441                           struct list_head *list,
1442                           enum perf_tool_event tool_event)
1443 {
1444         return add_event_tool(list, &parse_state->idx, tool_event);
1445 }
1446
1447 static bool config_term_percore(struct list_head *config_terms)
1448 {
1449         struct evsel_config_term *term;
1450
1451         list_for_each_entry(term, config_terms, list) {
1452                 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1453                         return term->val.percore;
1454         }
1455
1456         return false;
1457 }
1458
1459 int parse_events_add_pmu(struct parse_events_state *parse_state,
1460                          struct list_head *list, char *name,
1461                          struct list_head *head_config,
1462                          bool auto_merge_stats,
1463                          bool use_alias)
1464 {
1465         struct perf_event_attr attr;
1466         struct perf_pmu_info info;
1467         struct perf_pmu *pmu;
1468         struct evsel *evsel;
1469         struct parse_events_error *err = parse_state->error;
1470         bool use_uncore_alias;
1471         LIST_HEAD(config_terms);
1472
1473         if (verbose > 1) {
1474                 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1475                         name);
1476                 if (head_config) {
1477                         struct parse_events_term *term;
1478
1479                         list_for_each_entry(term, head_config, list) {
1480                                 fprintf(stderr, "%s,", term->config);
1481                         }
1482                 }
1483                 fprintf(stderr, "' that may result in non-fatal errors\n");
1484         }
1485
1486         pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1487         if (!pmu) {
1488                 char *err_str;
1489
1490                 if (asprintf(&err_str,
1491                                 "Cannot find PMU `%s'. Missing kernel support?",
1492                                 name) >= 0)
1493                         parse_events__handle_error(err, 0, err_str, NULL);
1494                 return -EINVAL;
1495         }
1496
1497         if (pmu->default_config) {
1498                 memcpy(&attr, pmu->default_config,
1499                        sizeof(struct perf_event_attr));
1500         } else {
1501                 memset(&attr, 0, sizeof(attr));
1502         }
1503
1504         use_uncore_alias = (pmu->is_uncore && use_alias);
1505
1506         if (!head_config) {
1507                 attr.type = pmu->type;
1508                 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1509                                     pmu, NULL, auto_merge_stats, NULL);
1510                 if (evsel) {
1511                         evsel->pmu_name = name ? strdup(name) : NULL;
1512                         evsel->use_uncore_alias = use_uncore_alias;
1513                         return 0;
1514                 } else {
1515                         return -ENOMEM;
1516                 }
1517         }
1518
1519         if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1520                 return -EINVAL;
1521
1522         if (verbose > 1) {
1523                 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1524                         name);
1525                 if (head_config) {
1526                         struct parse_events_term *term;
1527
1528                         list_for_each_entry(term, head_config, list) {
1529                                 fprintf(stderr, "%s,", term->config);
1530                         }
1531                 }
1532                 fprintf(stderr, "' that may result in non-fatal errors\n");
1533         }
1534
1535         /*
1536          * Configure hardcoded terms first, no need to check
1537          * return value when called with fail == 0 ;)
1538          */
1539         if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1540                 return -EINVAL;
1541
1542         if (get_config_terms(head_config, &config_terms))
1543                 return -ENOMEM;
1544
1545         /*
1546          * When using default config, record which bits of attr->config were
1547          * changed by the user.
1548          */
1549         if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1550                 return -ENOMEM;
1551
1552         if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1553                 struct evsel_config_term *pos, *tmp;
1554
1555                 list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1556                         list_del_init(&pos->list);
1557                         if (pos->free_str)
1558                                 zfree(&pos->val.str);
1559                         free(pos);
1560                 }
1561                 return -EINVAL;
1562         }
1563
1564         evsel = __add_event(list, &parse_state->idx, &attr, true,
1565                             get_config_name(head_config), pmu,
1566                             &config_terms, auto_merge_stats, NULL);
1567         if (!evsel)
1568                 return -ENOMEM;
1569
1570         evsel->pmu_name = name ? strdup(name) : NULL;
1571         evsel->use_uncore_alias = use_uncore_alias;
1572         evsel->percore = config_term_percore(&evsel->config_terms);
1573
1574         if (parse_state->fake_pmu)
1575                 return 0;
1576
1577         evsel->unit = info.unit;
1578         evsel->scale = info.scale;
1579         evsel->per_pkg = info.per_pkg;
1580         evsel->snapshot = info.snapshot;
1581         evsel->metric_expr = info.metric_expr;
1582         evsel->metric_name = info.metric_name;
1583         return 0;
1584 }
1585
1586 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1587                                char *str, struct list_head **listp)
1588 {
1589         struct parse_events_term *term;
1590         struct list_head *list;
1591         struct perf_pmu *pmu = NULL;
1592         int ok = 0;
1593
1594         *listp = NULL;
1595         /* Add it for all PMUs that support the alias */
1596         list = malloc(sizeof(struct list_head));
1597         if (!list)
1598                 return -1;
1599         INIT_LIST_HEAD(list);
1600         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1601                 struct perf_pmu_alias *alias;
1602
1603                 list_for_each_entry(alias, &pmu->aliases, list) {
1604                         if (!strcasecmp(alias->name, str)) {
1605                                 struct list_head *head;
1606                                 char *config;
1607
1608                                 head = malloc(sizeof(struct list_head));
1609                                 if (!head)
1610                                         return -1;
1611                                 INIT_LIST_HEAD(head);
1612                                 config = strdup(str);
1613                                 if (!config)
1614                                         return -1;
1615                                 if (parse_events_term__num(&term,
1616                                                    PARSE_EVENTS__TERM_TYPE_USER,
1617                                                    config, 1, false, &config,
1618                                                    NULL) < 0) {
1619                                         free(list);
1620                                         free(config);
1621                                         return -1;
1622                                 }
1623                                 list_add_tail(&term->list, head);
1624
1625                                 if (!parse_events_add_pmu(parse_state, list,
1626                                                           pmu->name, head,
1627                                                           true, true)) {
1628                                         pr_debug("%s -> %s/%s/\n", str,
1629                                                  pmu->name, alias->str);
1630                                         ok++;
1631                                 }
1632
1633                                 parse_events_terms__delete(head);
1634                         }
1635                 }
1636         }
1637         if (!ok) {
1638                 free(list);
1639                 return -1;
1640         }
1641         *listp = list;
1642         return 0;
1643 }
1644
1645 int parse_events__modifier_group(struct list_head *list,
1646                                  char *event_mod)
1647 {
1648         return parse_events__modifier_event(list, event_mod, true);
1649 }
1650
1651 /*
1652  * Check if the two uncore PMUs are from the same uncore block
1653  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1654  */
1655 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1656 {
1657         char *end_a, *end_b;
1658
1659         end_a = strrchr(pmu_name_a, '_');
1660         end_b = strrchr(pmu_name_b, '_');
1661
1662         if (!end_a || !end_b)
1663                 return false;
1664
1665         if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1666                 return false;
1667
1668         return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1669 }
1670
1671 static int
1672 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1673                                            struct parse_events_state *parse_state)
1674 {
1675         struct evsel *evsel, *leader;
1676         uintptr_t *leaders;
1677         bool is_leader = true;
1678         int i, nr_pmu = 0, total_members, ret = 0;
1679
1680         leader = list_first_entry(list, struct evsel, core.node);
1681         evsel = list_last_entry(list, struct evsel, core.node);
1682         total_members = evsel->idx - leader->idx + 1;
1683
1684         leaders = calloc(total_members, sizeof(uintptr_t));
1685         if (WARN_ON(!leaders))
1686                 return 0;
1687
1688         /*
1689          * Going through the whole group and doing sanity check.
1690          * All members must use alias, and be from the same uncore block.
1691          * Also, storing the leader events in an array.
1692          */
1693         __evlist__for_each_entry(list, evsel) {
1694
1695                 /* Only split the uncore group which members use alias */
1696                 if (!evsel->use_uncore_alias)
1697                         goto out;
1698
1699                 /* The events must be from the same uncore block */
1700                 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1701                         goto out;
1702
1703                 if (!is_leader)
1704                         continue;
1705                 /*
1706                  * If the event's PMU name starts to repeat, it must be a new
1707                  * event. That can be used to distinguish the leader from
1708                  * other members, even they have the same event name.
1709                  */
1710                 if ((leader != evsel) &&
1711                     !strcmp(leader->pmu_name, evsel->pmu_name)) {
1712                         is_leader = false;
1713                         continue;
1714                 }
1715
1716                 /* Store the leader event for each PMU */
1717                 leaders[nr_pmu++] = (uintptr_t) evsel;
1718         }
1719
1720         /* only one event alias */
1721         if (nr_pmu == total_members) {
1722                 parse_state->nr_groups--;
1723                 goto handled;
1724         }
1725
1726         /*
1727          * An uncore event alias is a joint name which means the same event
1728          * runs on all PMUs of a block.
1729          * Perf doesn't support mixed events from different PMUs in the same
1730          * group. The big group has to be split into multiple small groups
1731          * which only include the events from the same PMU.
1732          *
1733          * Here the uncore event aliases must be from the same uncore block.
1734          * The number of PMUs must be same for each alias. The number of new
1735          * small groups equals to the number of PMUs.
1736          * Setting the leader event for corresponding members in each group.
1737          */
1738         i = 0;
1739         __evlist__for_each_entry(list, evsel) {
1740                 if (i >= nr_pmu)
1741                         i = 0;
1742                 evsel->leader = (struct evsel *) leaders[i++];
1743         }
1744
1745         /* The number of members and group name are same for each group */
1746         for (i = 0; i < nr_pmu; i++) {
1747                 evsel = (struct evsel *) leaders[i];
1748                 evsel->core.nr_members = total_members / nr_pmu;
1749                 evsel->group_name = name ? strdup(name) : NULL;
1750         }
1751
1752         /* Take the new small groups into account */
1753         parse_state->nr_groups += nr_pmu - 1;
1754
1755 handled:
1756         ret = 1;
1757 out:
1758         free(leaders);
1759         return ret;
1760 }
1761
1762 void parse_events__set_leader(char *name, struct list_head *list,
1763                               struct parse_events_state *parse_state)
1764 {
1765         struct evsel *leader;
1766
1767         if (list_empty(list)) {
1768                 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1769                 return;
1770         }
1771
1772         if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1773                 return;
1774
1775         __evlist__set_leader(list);
1776         leader = list_entry(list->next, struct evsel, core.node);
1777         leader->group_name = name ? strdup(name) : NULL;
1778 }
1779
1780 /* list_event is assumed to point to malloc'ed memory */
1781 void parse_events_update_lists(struct list_head *list_event,
1782                                struct list_head *list_all)
1783 {
1784         /*
1785          * Called for single event definition. Update the
1786          * 'all event' list, and reinit the 'single event'
1787          * list, for next event definition.
1788          */
1789         list_splice_tail(list_event, list_all);
1790         free(list_event);
1791 }
1792
1793 struct event_modifier {
1794         int eu;
1795         int ek;
1796         int eh;
1797         int eH;
1798         int eG;
1799         int eI;
1800         int precise;
1801         int precise_max;
1802         int exclude_GH;
1803         int sample_read;
1804         int pinned;
1805         int weak;
1806         int exclusive;
1807 };
1808
1809 static int get_event_modifier(struct event_modifier *mod, char *str,
1810                                struct evsel *evsel)
1811 {
1812         int eu = evsel ? evsel->core.attr.exclude_user : 0;
1813         int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1814         int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1815         int eH = evsel ? evsel->core.attr.exclude_host : 0;
1816         int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1817         int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1818         int precise = evsel ? evsel->core.attr.precise_ip : 0;
1819         int precise_max = 0;
1820         int sample_read = 0;
1821         int pinned = evsel ? evsel->core.attr.pinned : 0;
1822         int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1823
1824         int exclude = eu | ek | eh;
1825         int exclude_GH = evsel ? evsel->exclude_GH : 0;
1826         int weak = 0;
1827
1828         memset(mod, 0, sizeof(*mod));
1829
1830         while (*str) {
1831                 if (*str == 'u') {
1832                         if (!exclude)
1833                                 exclude = eu = ek = eh = 1;
1834                         if (!exclude_GH && !perf_guest)
1835                                 eG = 1;
1836                         eu = 0;
1837                 } else if (*str == 'k') {
1838                         if (!exclude)
1839                                 exclude = eu = ek = eh = 1;
1840                         ek = 0;
1841                 } else if (*str == 'h') {
1842                         if (!exclude)
1843                                 exclude = eu = ek = eh = 1;
1844                         eh = 0;
1845                 } else if (*str == 'G') {
1846                         if (!exclude_GH)
1847                                 exclude_GH = eG = eH = 1;
1848                         eG = 0;
1849                 } else if (*str == 'H') {
1850                         if (!exclude_GH)
1851                                 exclude_GH = eG = eH = 1;
1852                         eH = 0;
1853                 } else if (*str == 'I') {
1854                         eI = 1;
1855                 } else if (*str == 'p') {
1856                         precise++;
1857                         /* use of precise requires exclude_guest */
1858                         if (!exclude_GH)
1859                                 eG = 1;
1860                 } else if (*str == 'P') {
1861                         precise_max = 1;
1862                 } else if (*str == 'S') {
1863                         sample_read = 1;
1864                 } else if (*str == 'D') {
1865                         pinned = 1;
1866                 } else if (*str == 'e') {
1867                         exclusive = 1;
1868                 } else if (*str == 'W') {
1869                         weak = 1;
1870                 } else
1871                         break;
1872
1873                 ++str;
1874         }
1875
1876         /*
1877          * precise ip:
1878          *
1879          *  0 - SAMPLE_IP can have arbitrary skid
1880          *  1 - SAMPLE_IP must have constant skid
1881          *  2 - SAMPLE_IP requested to have 0 skid
1882          *  3 - SAMPLE_IP must have 0 skid
1883          *
1884          *  See also PERF_RECORD_MISC_EXACT_IP
1885          */
1886         if (precise > 3)
1887                 return -EINVAL;
1888
1889         mod->eu = eu;
1890         mod->ek = ek;
1891         mod->eh = eh;
1892         mod->eH = eH;
1893         mod->eG = eG;
1894         mod->eI = eI;
1895         mod->precise = precise;
1896         mod->precise_max = precise_max;
1897         mod->exclude_GH = exclude_GH;
1898         mod->sample_read = sample_read;
1899         mod->pinned = pinned;
1900         mod->weak = weak;
1901         mod->exclusive = exclusive;
1902
1903         return 0;
1904 }
1905
1906 /*
1907  * Basic modifier sanity check to validate it contains only one
1908  * instance of any modifier (apart from 'p') present.
1909  */
1910 static int check_modifier(char *str)
1911 {
1912         char *p = str;
1913
1914         /* The sizeof includes 0 byte as well. */
1915         if (strlen(str) > (sizeof("ukhGHpppPSDIWe") - 1))
1916                 return -1;
1917
1918         while (*p) {
1919                 if (*p != 'p' && strchr(p + 1, *p))
1920                         return -1;
1921                 p++;
1922         }
1923
1924         return 0;
1925 }
1926
1927 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1928 {
1929         struct evsel *evsel;
1930         struct event_modifier mod;
1931
1932         if (str == NULL)
1933                 return 0;
1934
1935         if (check_modifier(str))
1936                 return -EINVAL;
1937
1938         if (!add && get_event_modifier(&mod, str, NULL))
1939                 return -EINVAL;
1940
1941         __evlist__for_each_entry(list, evsel) {
1942                 if (add && get_event_modifier(&mod, str, evsel))
1943                         return -EINVAL;
1944
1945                 evsel->core.attr.exclude_user   = mod.eu;
1946                 evsel->core.attr.exclude_kernel = mod.ek;
1947                 evsel->core.attr.exclude_hv     = mod.eh;
1948                 evsel->core.attr.precise_ip     = mod.precise;
1949                 evsel->core.attr.exclude_host   = mod.eH;
1950                 evsel->core.attr.exclude_guest  = mod.eG;
1951                 evsel->core.attr.exclude_idle   = mod.eI;
1952                 evsel->exclude_GH          = mod.exclude_GH;
1953                 evsel->sample_read         = mod.sample_read;
1954                 evsel->precise_max         = mod.precise_max;
1955                 evsel->weak_group          = mod.weak;
1956
1957                 if (evsel__is_group_leader(evsel)) {
1958                         evsel->core.attr.pinned = mod.pinned;
1959                         evsel->core.attr.exclusive = mod.exclusive;
1960                 }
1961         }
1962
1963         return 0;
1964 }
1965
1966 int parse_events_name(struct list_head *list, char *name)
1967 {
1968         struct evsel *evsel;
1969
1970         __evlist__for_each_entry(list, evsel) {
1971                 if (!evsel->name)
1972                         evsel->name = strdup(name);
1973         }
1974
1975         return 0;
1976 }
1977
1978 static int
1979 comp_pmu(const void *p1, const void *p2)
1980 {
1981         struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1982         struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1983
1984         return strcasecmp(pmu1->symbol, pmu2->symbol);
1985 }
1986
1987 static void perf_pmu__parse_cleanup(void)
1988 {
1989         if (perf_pmu_events_list_num > 0) {
1990                 struct perf_pmu_event_symbol *p;
1991                 int i;
1992
1993                 for (i = 0; i < perf_pmu_events_list_num; i++) {
1994                         p = perf_pmu_events_list + i;
1995                         zfree(&p->symbol);
1996                 }
1997                 zfree(&perf_pmu_events_list);
1998                 perf_pmu_events_list_num = 0;
1999         }
2000 }
2001
2002 #define SET_SYMBOL(str, stype)          \
2003 do {                                    \
2004         p->symbol = str;                \
2005         if (!p->symbol)                 \
2006                 goto err;               \
2007         p->type = stype;                \
2008 } while (0)
2009
2010 /*
2011  * Read the pmu events list from sysfs
2012  * Save it into perf_pmu_events_list
2013  */
2014 static void perf_pmu__parse_init(void)
2015 {
2016
2017         struct perf_pmu *pmu = NULL;
2018         struct perf_pmu_alias *alias;
2019         int len = 0;
2020
2021         pmu = NULL;
2022         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2023                 list_for_each_entry(alias, &pmu->aliases, list) {
2024                         if (strchr(alias->name, '-'))
2025                                 len++;
2026                         len++;
2027                 }
2028         }
2029
2030         if (len == 0) {
2031                 perf_pmu_events_list_num = -1;
2032                 return;
2033         }
2034         perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2035         if (!perf_pmu_events_list)
2036                 return;
2037         perf_pmu_events_list_num = len;
2038
2039         len = 0;
2040         pmu = NULL;
2041         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2042                 list_for_each_entry(alias, &pmu->aliases, list) {
2043                         struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2044                         char *tmp = strchr(alias->name, '-');
2045
2046                         if (tmp != NULL) {
2047                                 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2048                                                 PMU_EVENT_SYMBOL_PREFIX);
2049                                 p++;
2050                                 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2051                                 len += 2;
2052                         } else {
2053                                 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2054                                 len++;
2055                         }
2056                 }
2057         }
2058         qsort(perf_pmu_events_list, len,
2059                 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2060
2061         return;
2062 err:
2063         perf_pmu__parse_cleanup();
2064 }
2065
2066 /*
2067  * This function injects special term in
2068  * perf_pmu_events_list so the test code
2069  * can check on this functionality.
2070  */
2071 int perf_pmu__test_parse_init(void)
2072 {
2073         struct perf_pmu_event_symbol *list;
2074
2075         list = malloc(sizeof(*list) * 1);
2076         if (!list)
2077                 return -ENOMEM;
2078
2079         list->type   = PMU_EVENT_SYMBOL;
2080         list->symbol = strdup("read");
2081
2082         if (!list->symbol) {
2083                 free(list);
2084                 return -ENOMEM;
2085         }
2086
2087         perf_pmu_events_list = list;
2088         perf_pmu_events_list_num = 1;
2089         return 0;
2090 }
2091
2092 enum perf_pmu_event_symbol_type
2093 perf_pmu__parse_check(const char *name)
2094 {
2095         struct perf_pmu_event_symbol p, *r;
2096
2097         /* scan kernel pmu events from sysfs if needed */
2098         if (perf_pmu_events_list_num == 0)
2099                 perf_pmu__parse_init();
2100         /*
2101          * name "cpu" could be prefix of cpu-cycles or cpu// events.
2102          * cpu-cycles has been handled by hardcode.
2103          * So it must be cpu// events, not kernel pmu event.
2104          */
2105         if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2106                 return PMU_EVENT_SYMBOL_ERR;
2107
2108         p.symbol = strdup(name);
2109         r = bsearch(&p, perf_pmu_events_list,
2110                         (size_t) perf_pmu_events_list_num,
2111                         sizeof(struct perf_pmu_event_symbol), comp_pmu);
2112         zfree(&p.symbol);
2113         return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2114 }
2115
2116 static int parse_events__scanner(const char *str,
2117                                  struct parse_events_state *parse_state)
2118 {
2119         YY_BUFFER_STATE buffer;
2120         void *scanner;
2121         int ret;
2122
2123         ret = parse_events_lex_init_extra(parse_state, &scanner);
2124         if (ret)
2125                 return ret;
2126
2127         buffer = parse_events__scan_string(str, scanner);
2128
2129 #ifdef PARSER_DEBUG
2130         parse_events_debug = 1;
2131         parse_events_set_debug(1, scanner);
2132 #endif
2133         ret = parse_events_parse(parse_state, scanner);
2134
2135         parse_events__flush_buffer(buffer, scanner);
2136         parse_events__delete_buffer(buffer, scanner);
2137         parse_events_lex_destroy(scanner);
2138         return ret;
2139 }
2140
2141 /*
2142  * parse event config string, return a list of event terms.
2143  */
2144 int parse_events_terms(struct list_head *terms, const char *str)
2145 {
2146         struct parse_events_state parse_state = {
2147                 .terms  = NULL,
2148                 .stoken = PE_START_TERMS,
2149         };
2150         int ret;
2151
2152         ret = parse_events__scanner(str, &parse_state);
2153         perf_pmu__parse_cleanup();
2154
2155         if (!ret) {
2156                 list_splice(parse_state.terms, terms);
2157                 zfree(&parse_state.terms);
2158                 return 0;
2159         }
2160
2161         parse_events_terms__delete(parse_state.terms);
2162         return ret;
2163 }
2164
2165 int __parse_events(struct evlist *evlist, const char *str,
2166                    struct parse_events_error *err, struct perf_pmu *fake_pmu)
2167 {
2168         struct parse_events_state parse_state = {
2169                 .list     = LIST_HEAD_INIT(parse_state.list),
2170                 .idx      = evlist->core.nr_entries,
2171                 .error    = err,
2172                 .evlist   = evlist,
2173                 .stoken   = PE_START_EVENTS,
2174                 .fake_pmu = fake_pmu,
2175         };
2176         int ret;
2177
2178         ret = parse_events__scanner(str, &parse_state);
2179         perf_pmu__parse_cleanup();
2180
2181         if (!ret && list_empty(&parse_state.list)) {
2182                 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2183                 return -1;
2184         }
2185
2186         /*
2187          * Add list to the evlist even with errors to allow callers to clean up.
2188          */
2189         evlist__splice_list_tail(evlist, &parse_state.list);
2190
2191         if (!ret) {
2192                 struct evsel *last;
2193
2194                 evlist->nr_groups += parse_state.nr_groups;
2195                 last = evlist__last(evlist);
2196                 last->cmdline_group_boundary = true;
2197
2198                 return 0;
2199         }
2200
2201         /*
2202          * There are 2 users - builtin-record and builtin-test objects.
2203          * Both call evlist__delete in case of error, so we dont
2204          * need to bother.
2205          */
2206         return ret;
2207 }
2208
2209 #define MAX_WIDTH 1000
2210 static int get_term_width(void)
2211 {
2212         struct winsize ws;
2213
2214         get_term_dimensions(&ws);
2215         return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2216 }
2217
2218 static void __parse_events_print_error(int err_idx, const char *err_str,
2219                                 const char *err_help, const char *event)
2220 {
2221         const char *str = "invalid or unsupported event: ";
2222         char _buf[MAX_WIDTH];
2223         char *buf = (char *) event;
2224         int idx = 0;
2225         if (err_str) {
2226                 /* -2 for extra '' in the final fprintf */
2227                 int width       = get_term_width() - 2;
2228                 int len_event   = strlen(event);
2229                 int len_str, max_len, cut = 0;
2230
2231                 /*
2232                  * Maximum error index indent, we will cut
2233                  * the event string if it's bigger.
2234                  */
2235                 int max_err_idx = 13;
2236
2237                 /*
2238                  * Let's be specific with the message when
2239                  * we have the precise error.
2240                  */
2241                 str     = "event syntax error: ";
2242                 len_str = strlen(str);
2243                 max_len = width - len_str;
2244
2245                 buf = _buf;
2246
2247                 /* We're cutting from the beginning. */
2248                 if (err_idx > max_err_idx)
2249                         cut = err_idx - max_err_idx;
2250
2251                 strncpy(buf, event + cut, max_len);
2252
2253                 /* Mark cut parts with '..' on both sides. */
2254                 if (cut)
2255                         buf[0] = buf[1] = '.';
2256
2257                 if ((len_event - cut) > max_len) {
2258                         buf[max_len - 1] = buf[max_len - 2] = '.';
2259                         buf[max_len] = 0;
2260                 }
2261
2262                 idx = len_str + err_idx - cut;
2263         }
2264
2265         fprintf(stderr, "%s'%s'\n", str, buf);
2266         if (idx) {
2267                 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2268                 if (err_help)
2269                         fprintf(stderr, "\n%s\n", err_help);
2270         }
2271 }
2272
2273 void parse_events_print_error(struct parse_events_error *err,
2274                               const char *event)
2275 {
2276         if (!err->num_errors)
2277                 return;
2278
2279         __parse_events_print_error(err->idx, err->str, err->help, event);
2280         zfree(&err->str);
2281         zfree(&err->help);
2282
2283         if (err->num_errors > 1) {
2284                 fputs("\nInitial error:\n", stderr);
2285                 __parse_events_print_error(err->first_idx, err->first_str,
2286                                         err->first_help, event);
2287                 zfree(&err->first_str);
2288                 zfree(&err->first_help);
2289         }
2290 }
2291
2292 #undef MAX_WIDTH
2293
2294 int parse_events_option(const struct option *opt, const char *str,
2295                         int unset __maybe_unused)
2296 {
2297         struct evlist *evlist = *(struct evlist **)opt->value;
2298         struct parse_events_error err;
2299         int ret;
2300
2301         bzero(&err, sizeof(err));
2302         ret = parse_events(evlist, str, &err);
2303
2304         if (ret) {
2305                 parse_events_print_error(&err, str);
2306                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2307         }
2308
2309         return ret;
2310 }
2311
2312 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2313 {
2314         struct evlist **evlistp = opt->value;
2315         int ret;
2316
2317         if (*evlistp == NULL) {
2318                 *evlistp = evlist__new();
2319
2320                 if (*evlistp == NULL) {
2321                         fprintf(stderr, "Not enough memory to create evlist\n");
2322                         return -1;
2323                 }
2324         }
2325
2326         ret = parse_events_option(opt, str, unset);
2327         if (ret) {
2328                 evlist__delete(*evlistp);
2329                 *evlistp = NULL;
2330         }
2331
2332         return ret;
2333 }
2334
2335 static int
2336 foreach_evsel_in_last_glob(struct evlist *evlist,
2337                            int (*func)(struct evsel *evsel,
2338                                        const void *arg),
2339                            const void *arg)
2340 {
2341         struct evsel *last = NULL;
2342         int err;
2343
2344         /*
2345          * Don't return when list_empty, give func a chance to report
2346          * error when it found last == NULL.
2347          *
2348          * So no need to WARN here, let *func do this.
2349          */
2350         if (evlist->core.nr_entries > 0)
2351                 last = evlist__last(evlist);
2352
2353         do {
2354                 err = (*func)(last, arg);
2355                 if (err)
2356                         return -1;
2357                 if (!last)
2358                         return 0;
2359
2360                 if (last->core.node.prev == &evlist->core.entries)
2361                         return 0;
2362                 last = list_entry(last->core.node.prev, struct evsel, core.node);
2363         } while (!last->cmdline_group_boundary);
2364
2365         return 0;
2366 }
2367
2368 static int set_filter(struct evsel *evsel, const void *arg)
2369 {
2370         const char *str = arg;
2371         bool found = false;
2372         int nr_addr_filters = 0;
2373         struct perf_pmu *pmu = NULL;
2374
2375         if (evsel == NULL) {
2376                 fprintf(stderr,
2377                         "--filter option should follow a -e tracepoint or HW tracer option\n");
2378                 return -1;
2379         }
2380
2381         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2382                 if (evsel__append_tp_filter(evsel, str) < 0) {
2383                         fprintf(stderr,
2384                                 "not enough memory to hold filter string\n");
2385                         return -1;
2386                 }
2387
2388                 return 0;
2389         }
2390
2391         while ((pmu = perf_pmu__scan(pmu)) != NULL)
2392                 if (pmu->type == evsel->core.attr.type) {
2393                         found = true;
2394                         break;
2395                 }
2396
2397         if (found)
2398                 perf_pmu__scan_file(pmu, "nr_addr_filters",
2399                                     "%d", &nr_addr_filters);
2400
2401         if (!nr_addr_filters) {
2402                 fprintf(stderr,
2403                         "This CPU does not support address filtering\n");
2404                 return -1;
2405         }
2406
2407         if (evsel__append_addr_filter(evsel, str) < 0) {
2408                 fprintf(stderr,
2409                         "not enough memory to hold filter string\n");
2410                 return -1;
2411         }
2412
2413         return 0;
2414 }
2415
2416 int parse_filter(const struct option *opt, const char *str,
2417                  int unset __maybe_unused)
2418 {
2419         struct evlist *evlist = *(struct evlist **)opt->value;
2420
2421         return foreach_evsel_in_last_glob(evlist, set_filter,
2422                                           (const void *)str);
2423 }
2424
2425 static int add_exclude_perf_filter(struct evsel *evsel,
2426                                    const void *arg __maybe_unused)
2427 {
2428         char new_filter[64];
2429
2430         if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2431                 fprintf(stderr,
2432                         "--exclude-perf option should follow a -e tracepoint option\n");
2433                 return -1;
2434         }
2435
2436         snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2437
2438         if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2439                 fprintf(stderr,
2440                         "not enough memory to hold filter string\n");
2441                 return -1;
2442         }
2443
2444         return 0;
2445 }
2446
2447 int exclude_perf(const struct option *opt,
2448                  const char *arg __maybe_unused,
2449                  int unset __maybe_unused)
2450 {
2451         struct evlist *evlist = *(struct evlist **)opt->value;
2452
2453         return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2454                                           NULL);
2455 }
2456
2457 static const char * const event_type_descriptors[] = {
2458         "Hardware event",
2459         "Software event",
2460         "Tracepoint event",
2461         "Hardware cache event",
2462         "Raw hardware event descriptor",
2463         "Hardware breakpoint",
2464 };
2465
2466 static int cmp_string(const void *a, const void *b)
2467 {
2468         const char * const *as = a;
2469         const char * const *bs = b;
2470
2471         return strcmp(*as, *bs);
2472 }
2473
2474 /*
2475  * Print the events from <debugfs_mount_point>/tracing/events
2476  */
2477
2478 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2479                              bool name_only)
2480 {
2481         DIR *sys_dir, *evt_dir;
2482         struct dirent *sys_dirent, *evt_dirent;
2483         char evt_path[MAXPATHLEN];
2484         char *dir_path;
2485         char **evt_list = NULL;
2486         unsigned int evt_i = 0, evt_num = 0;
2487         bool evt_num_known = false;
2488
2489 restart:
2490         sys_dir = tracing_events__opendir();
2491         if (!sys_dir)
2492                 return;
2493
2494         if (evt_num_known) {
2495                 evt_list = zalloc(sizeof(char *) * evt_num);
2496                 if (!evt_list)
2497                         goto out_close_sys_dir;
2498         }
2499
2500         for_each_subsystem(sys_dir, sys_dirent) {
2501                 if (subsys_glob != NULL &&
2502                     !strglobmatch(sys_dirent->d_name, subsys_glob))
2503                         continue;
2504
2505                 dir_path = get_events_file(sys_dirent->d_name);
2506                 if (!dir_path)
2507                         continue;
2508                 evt_dir = opendir(dir_path);
2509                 if (!evt_dir)
2510                         goto next;
2511
2512                 for_each_event(dir_path, evt_dir, evt_dirent) {
2513                         if (event_glob != NULL &&
2514                             !strglobmatch(evt_dirent->d_name, event_glob))
2515                                 continue;
2516
2517                         if (!evt_num_known) {
2518                                 evt_num++;
2519                                 continue;
2520                         }
2521
2522                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2523                                  sys_dirent->d_name, evt_dirent->d_name);
2524
2525                         evt_list[evt_i] = strdup(evt_path);
2526                         if (evt_list[evt_i] == NULL) {
2527                                 put_events_file(dir_path);
2528                                 goto out_close_evt_dir;
2529                         }
2530                         evt_i++;
2531                 }
2532                 closedir(evt_dir);
2533 next:
2534                 put_events_file(dir_path);
2535         }
2536         closedir(sys_dir);
2537
2538         if (!evt_num_known) {
2539                 evt_num_known = true;
2540                 goto restart;
2541         }
2542         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2543         evt_i = 0;
2544         while (evt_i < evt_num) {
2545                 if (name_only) {
2546                         printf("%s ", evt_list[evt_i++]);
2547                         continue;
2548                 }
2549                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2550                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2551         }
2552         if (evt_num && pager_in_use())
2553                 printf("\n");
2554
2555 out_free:
2556         evt_num = evt_i;
2557         for (evt_i = 0; evt_i < evt_num; evt_i++)
2558                 zfree(&evt_list[evt_i]);
2559         zfree(&evt_list);
2560         return;
2561
2562 out_close_evt_dir:
2563         closedir(evt_dir);
2564 out_close_sys_dir:
2565         closedir(sys_dir);
2566
2567         printf("FATAL: not enough memory to print %s\n",
2568                         event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2569         if (evt_list)
2570                 goto out_free;
2571 }
2572
2573 /*
2574  * Check whether event is in <debugfs_mount_point>/tracing/events
2575  */
2576
2577 int is_valid_tracepoint(const char *event_string)
2578 {
2579         DIR *sys_dir, *evt_dir;
2580         struct dirent *sys_dirent, *evt_dirent;
2581         char evt_path[MAXPATHLEN];
2582         char *dir_path;
2583
2584         sys_dir = tracing_events__opendir();
2585         if (!sys_dir)
2586                 return 0;
2587
2588         for_each_subsystem(sys_dir, sys_dirent) {
2589                 dir_path = get_events_file(sys_dirent->d_name);
2590                 if (!dir_path)
2591                         continue;
2592                 evt_dir = opendir(dir_path);
2593                 if (!evt_dir)
2594                         goto next;
2595
2596                 for_each_event(dir_path, evt_dir, evt_dirent) {
2597                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
2598                                  sys_dirent->d_name, evt_dirent->d_name);
2599                         if (!strcmp(evt_path, event_string)) {
2600                                 closedir(evt_dir);
2601                                 closedir(sys_dir);
2602                                 return 1;
2603                         }
2604                 }
2605                 closedir(evt_dir);
2606 next:
2607                 put_events_file(dir_path);
2608         }
2609         closedir(sys_dir);
2610         return 0;
2611 }
2612
2613 static bool is_event_supported(u8 type, unsigned config)
2614 {
2615         bool ret = true;
2616         int open_return;
2617         struct evsel *evsel;
2618         struct perf_event_attr attr = {
2619                 .type = type,
2620                 .config = config,
2621                 .disabled = 1,
2622         };
2623         struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2624
2625         if (tmap == NULL)
2626                 return false;
2627
2628         evsel = evsel__new(&attr);
2629         if (evsel) {
2630                 open_return = evsel__open(evsel, NULL, tmap);
2631                 ret = open_return >= 0;
2632
2633                 if (open_return == -EACCES) {
2634                         /*
2635                          * This happens if the paranoid value
2636                          * /proc/sys/kernel/perf_event_paranoid is set to 2
2637                          * Re-run with exclude_kernel set; we don't do that
2638                          * by default as some ARM machines do not support it.
2639                          *
2640                          */
2641                         evsel->core.attr.exclude_kernel = 1;
2642                         ret = evsel__open(evsel, NULL, tmap) >= 0;
2643                 }
2644                 evsel__delete(evsel);
2645         }
2646
2647         perf_thread_map__put(tmap);
2648         return ret;
2649 }
2650
2651 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2652                       bool name_only)
2653 {
2654         struct probe_cache *pcache;
2655         struct probe_cache_entry *ent;
2656         struct strlist *bidlist, *sdtlist;
2657         struct strlist_config cfg = {.dont_dupstr = true};
2658         struct str_node *nd, *nd2;
2659         char *buf, *path, *ptr = NULL;
2660         bool show_detail = false;
2661         int ret;
2662
2663         sdtlist = strlist__new(NULL, &cfg);
2664         if (!sdtlist) {
2665                 pr_debug("Failed to allocate new strlist for SDT\n");
2666                 return;
2667         }
2668         bidlist = build_id_cache__list_all(true);
2669         if (!bidlist) {
2670                 pr_debug("Failed to get buildids: %d\n", errno);
2671                 return;
2672         }
2673         strlist__for_each_entry(nd, bidlist) {
2674                 pcache = probe_cache__new(nd->s, NULL);
2675                 if (!pcache)
2676                         continue;
2677                 list_for_each_entry(ent, &pcache->entries, node) {
2678                         if (!ent->sdt)
2679                                 continue;
2680                         if (subsys_glob &&
2681                             !strglobmatch(ent->pev.group, subsys_glob))
2682                                 continue;
2683                         if (event_glob &&
2684                             !strglobmatch(ent->pev.event, event_glob))
2685                                 continue;
2686                         ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2687                                         ent->pev.event, nd->s);
2688                         if (ret > 0)
2689                                 strlist__add(sdtlist, buf);
2690                 }
2691                 probe_cache__delete(pcache);
2692         }
2693         strlist__delete(bidlist);
2694
2695         strlist__for_each_entry(nd, sdtlist) {
2696                 buf = strchr(nd->s, '@');
2697                 if (buf)
2698                         *(buf++) = '\0';
2699                 if (name_only) {
2700                         printf("%s ", nd->s);
2701                         continue;
2702                 }
2703                 nd2 = strlist__next(nd);
2704                 if (nd2) {
2705                         ptr = strchr(nd2->s, '@');
2706                         if (ptr)
2707                                 *ptr = '\0';
2708                         if (strcmp(nd->s, nd2->s) == 0)
2709                                 show_detail = true;
2710                 }
2711                 if (show_detail) {
2712                         path = build_id_cache__origname(buf);
2713                         ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2714                         if (ret > 0) {
2715                                 printf("  %-50s [%s]\n", buf, "SDT event");
2716                                 free(buf);
2717                         }
2718                         free(path);
2719                 } else
2720                         printf("  %-50s [%s]\n", nd->s, "SDT event");
2721                 if (nd2) {
2722                         if (strcmp(nd->s, nd2->s) != 0)
2723                                 show_detail = false;
2724                         if (ptr)
2725                                 *ptr = '@';
2726                 }
2727         }
2728         strlist__delete(sdtlist);
2729 }
2730
2731 int print_hwcache_events(const char *event_glob, bool name_only)
2732 {
2733         unsigned int type, op, i, evt_i = 0, evt_num = 0;
2734         char name[64];
2735         char **evt_list = NULL;
2736         bool evt_num_known = false;
2737
2738 restart:
2739         if (evt_num_known) {
2740                 evt_list = zalloc(sizeof(char *) * evt_num);
2741                 if (!evt_list)
2742                         goto out_enomem;
2743         }
2744
2745         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2746                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2747                         /* skip invalid cache type */
2748                         if (!evsel__is_cache_op_valid(type, op))
2749                                 continue;
2750
2751                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2752                                 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2753                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
2754                                         continue;
2755
2756                                 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2757                                                         type | (op << 8) | (i << 16)))
2758                                         continue;
2759
2760                                 if (!evt_num_known) {
2761                                         evt_num++;
2762                                         continue;
2763                                 }
2764
2765                                 evt_list[evt_i] = strdup(name);
2766                                 if (evt_list[evt_i] == NULL)
2767                                         goto out_enomem;
2768                                 evt_i++;
2769                         }
2770                 }
2771         }
2772
2773         if (!evt_num_known) {
2774                 evt_num_known = true;
2775                 goto restart;
2776         }
2777         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2778         evt_i = 0;
2779         while (evt_i < evt_num) {
2780                 if (name_only) {
2781                         printf("%s ", evt_list[evt_i++]);
2782                         continue;
2783                 }
2784                 printf("  %-50s [%s]\n", evt_list[evt_i++],
2785                                 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2786         }
2787         if (evt_num && pager_in_use())
2788                 printf("\n");
2789
2790 out_free:
2791         evt_num = evt_i;
2792         for (evt_i = 0; evt_i < evt_num; evt_i++)
2793                 zfree(&evt_list[evt_i]);
2794         zfree(&evt_list);
2795         return evt_num;
2796
2797 out_enomem:
2798         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2799         if (evt_list)
2800                 goto out_free;
2801         return evt_num;
2802 }
2803
2804 static void print_tool_event(const char *name, const char *event_glob,
2805                              bool name_only)
2806 {
2807         if (event_glob && !strglobmatch(name, event_glob))
2808                 return;
2809         if (name_only)
2810                 printf("%s ", name);
2811         else
2812                 printf("  %-50s [%s]\n", name, "Tool event");
2813
2814 }
2815
2816 void print_tool_events(const char *event_glob, bool name_only)
2817 {
2818         print_tool_event("duration_time", event_glob, name_only);
2819         if (pager_in_use())
2820                 printf("\n");
2821 }
2822
2823 void print_symbol_events(const char *event_glob, unsigned type,
2824                                 struct event_symbol *syms, unsigned max,
2825                                 bool name_only)
2826 {
2827         unsigned int i, evt_i = 0, evt_num = 0;
2828         char name[MAX_NAME_LEN];
2829         char **evt_list = NULL;
2830         bool evt_num_known = false;
2831
2832 restart:
2833         if (evt_num_known) {
2834                 evt_list = zalloc(sizeof(char *) * evt_num);
2835                 if (!evt_list)
2836                         goto out_enomem;
2837                 syms -= max;
2838         }
2839
2840         for (i = 0; i < max; i++, syms++) {
2841
2842                 if (event_glob != NULL && syms->symbol != NULL &&
2843                     !(strglobmatch(syms->symbol, event_glob) ||
2844                       (syms->alias && strglobmatch(syms->alias, event_glob))))
2845                         continue;
2846
2847                 if (!is_event_supported(type, i))
2848                         continue;
2849
2850                 if (!evt_num_known) {
2851                         evt_num++;
2852                         continue;
2853                 }
2854
2855                 if (!name_only && strlen(syms->alias))
2856                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2857                 else
2858                         strlcpy(name, syms->symbol, MAX_NAME_LEN);
2859
2860                 evt_list[evt_i] = strdup(name);
2861                 if (evt_list[evt_i] == NULL)
2862                         goto out_enomem;
2863                 evt_i++;
2864         }
2865
2866         if (!evt_num_known) {
2867                 evt_num_known = true;
2868                 goto restart;
2869         }
2870         qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2871         evt_i = 0;
2872         while (evt_i < evt_num) {
2873                 if (name_only) {
2874                         printf("%s ", evt_list[evt_i++]);
2875                         continue;
2876                 }
2877                 printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2878         }
2879         if (evt_num && pager_in_use())
2880                 printf("\n");
2881
2882 out_free:
2883         evt_num = evt_i;
2884         for (evt_i = 0; evt_i < evt_num; evt_i++)
2885                 zfree(&evt_list[evt_i]);
2886         zfree(&evt_list);
2887         return;
2888
2889 out_enomem:
2890         printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2891         if (evt_list)
2892                 goto out_free;
2893 }
2894
2895 /*
2896  * Print the help text for the event symbols:
2897  */
2898 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2899                         bool long_desc, bool details_flag, bool deprecated)
2900 {
2901         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2902                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2903
2904         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2905                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2906         print_tool_events(event_glob, name_only);
2907
2908         print_hwcache_events(event_glob, name_only);
2909
2910         print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2911                         details_flag, deprecated);
2912
2913         if (event_glob != NULL)
2914                 return;
2915
2916         if (!name_only) {
2917                 printf("  %-50s [%s]\n",
2918                        "rNNN",
2919                        event_type_descriptors[PERF_TYPE_RAW]);
2920                 printf("  %-50s [%s]\n",
2921                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2922                        event_type_descriptors[PERF_TYPE_RAW]);
2923                 if (pager_in_use())
2924                         printf("   (see 'man perf-list' on how to encode it)\n\n");
2925
2926                 printf("  %-50s [%s]\n",
2927                        "mem:<addr>[/len][:access]",
2928                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2929                 if (pager_in_use())
2930                         printf("\n");
2931         }
2932
2933         print_tracepoint_events(NULL, NULL, name_only);
2934
2935         print_sdt_events(NULL, NULL, name_only);
2936
2937         metricgroup__print(true, true, NULL, name_only, details_flag);
2938
2939         print_libpfm_events(name_only, long_desc);
2940 }
2941
2942 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2943 {
2944         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2945 }
2946
2947 static int new_term(struct parse_events_term **_term,
2948                     struct parse_events_term *temp,
2949                     char *str, u64 num)
2950 {
2951         struct parse_events_term *term;
2952
2953         term = malloc(sizeof(*term));
2954         if (!term)
2955                 return -ENOMEM;
2956
2957         *term = *temp;
2958         INIT_LIST_HEAD(&term->list);
2959         term->weak = false;
2960
2961         switch (term->type_val) {
2962         case PARSE_EVENTS__TERM_TYPE_NUM:
2963                 term->val.num = num;
2964                 break;
2965         case PARSE_EVENTS__TERM_TYPE_STR:
2966                 term->val.str = str;
2967                 break;
2968         default:
2969                 free(term);
2970                 return -EINVAL;
2971         }
2972
2973         *_term = term;
2974         return 0;
2975 }
2976
2977 int parse_events_term__num(struct parse_events_term **term,
2978                            int type_term, char *config, u64 num,
2979                            bool no_value,
2980                            void *loc_term_, void *loc_val_)
2981 {
2982         YYLTYPE *loc_term = loc_term_;
2983         YYLTYPE *loc_val = loc_val_;
2984
2985         struct parse_events_term temp = {
2986                 .type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2987                 .type_term = type_term,
2988                 .config    = config,
2989                 .no_value  = no_value,
2990                 .err_term  = loc_term ? loc_term->first_column : 0,
2991                 .err_val   = loc_val  ? loc_val->first_column  : 0,
2992         };
2993
2994         return new_term(term, &temp, NULL, num);
2995 }
2996
2997 int parse_events_term__str(struct parse_events_term **term,
2998                            int type_term, char *config, char *str,
2999                            void *loc_term_, void *loc_val_)
3000 {
3001         YYLTYPE *loc_term = loc_term_;
3002         YYLTYPE *loc_val = loc_val_;
3003
3004         struct parse_events_term temp = {
3005                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3006                 .type_term = type_term,
3007                 .config    = config,
3008                 .err_term  = loc_term ? loc_term->first_column : 0,
3009                 .err_val   = loc_val  ? loc_val->first_column  : 0,
3010         };
3011
3012         return new_term(term, &temp, str, 0);
3013 }
3014
3015 int parse_events_term__sym_hw(struct parse_events_term **term,
3016                               char *config, unsigned idx)
3017 {
3018         struct event_symbol *sym;
3019         char *str;
3020         struct parse_events_term temp = {
3021                 .type_val  = PARSE_EVENTS__TERM_TYPE_STR,
3022                 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3023                 .config    = config,
3024         };
3025
3026         if (!temp.config) {
3027                 temp.config = strdup("event");
3028                 if (!temp.config)
3029                         return -ENOMEM;
3030         }
3031         BUG_ON(idx >= PERF_COUNT_HW_MAX);
3032         sym = &event_symbols_hw[idx];
3033
3034         str = strdup(sym->symbol);
3035         if (!str)
3036                 return -ENOMEM;
3037         return new_term(term, &temp, str, 0);
3038 }
3039
3040 int parse_events_term__clone(struct parse_events_term **new,
3041                              struct parse_events_term *term)
3042 {
3043         char *str;
3044         struct parse_events_term temp = {
3045                 .type_val  = term->type_val,
3046                 .type_term = term->type_term,
3047                 .config    = NULL,
3048                 .err_term  = term->err_term,
3049                 .err_val   = term->err_val,
3050         };
3051
3052         if (term->config) {
3053                 temp.config = strdup(term->config);
3054                 if (!temp.config)
3055                         return -ENOMEM;
3056         }
3057         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3058                 return new_term(new, &temp, NULL, term->val.num);
3059
3060         str = strdup(term->val.str);
3061         if (!str)
3062                 return -ENOMEM;
3063         return new_term(new, &temp, str, 0);
3064 }
3065
3066 void parse_events_term__delete(struct parse_events_term *term)
3067 {
3068         if (term->array.nr_ranges)
3069                 zfree(&term->array.ranges);
3070
3071         if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3072                 zfree(&term->val.str);
3073
3074         zfree(&term->config);
3075         free(term);
3076 }
3077
3078 int parse_events_copy_term_list(struct list_head *old,
3079                                  struct list_head **new)
3080 {
3081         struct parse_events_term *term, *n;
3082         int ret;
3083
3084         if (!old) {
3085                 *new = NULL;
3086                 return 0;
3087         }
3088
3089         *new = malloc(sizeof(struct list_head));
3090         if (!*new)
3091                 return -ENOMEM;
3092         INIT_LIST_HEAD(*new);
3093
3094         list_for_each_entry (term, old, list) {
3095                 ret = parse_events_term__clone(&n, term);
3096                 if (ret)
3097                         return ret;
3098                 list_add_tail(&n->list, *new);
3099         }
3100         return 0;
3101 }
3102
3103 void parse_events_terms__purge(struct list_head *terms)
3104 {
3105         struct parse_events_term *term, *h;
3106
3107         list_for_each_entry_safe(term, h, terms, list) {
3108                 list_del_init(&term->list);
3109                 parse_events_term__delete(term);
3110         }
3111 }
3112
3113 void parse_events_terms__delete(struct list_head *terms)
3114 {
3115         if (!terms)
3116                 return;
3117         parse_events_terms__purge(terms);
3118         free(terms);
3119 }
3120
3121 void parse_events__clear_array(struct parse_events_array *a)
3122 {
3123         zfree(&a->ranges);
3124 }
3125
3126 void parse_events_evlist_error(struct parse_events_state *parse_state,
3127                                int idx, const char *str)
3128 {
3129         if (!parse_state->error)
3130                 return;
3131
3132         parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3133 }
3134
3135 static void config_terms_list(char *buf, size_t buf_sz)
3136 {
3137         int i;
3138         bool first = true;
3139
3140         buf[0] = '\0';
3141         for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3142                 const char *name = config_term_names[i];
3143
3144                 if (!config_term_avail(i, NULL))
3145                         continue;
3146                 if (!name)
3147                         continue;
3148                 if (name[0] == '<')
3149                         continue;
3150
3151                 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3152                         return;
3153
3154                 if (!first)
3155                         strcat(buf, ",");
3156                 else
3157                         first = false;
3158                 strcat(buf, name);
3159         }
3160 }
3161
3162 /*
3163  * Return string contains valid config terms of an event.
3164  * @additional_terms: For terms such as PMU sysfs terms.
3165  */
3166 char *parse_events_formats_error_string(char *additional_terms)
3167 {
3168         char *str;
3169         /* "no-overwrite" is the longest name */
3170         char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3171                           (sizeof("no-overwrite") - 1)];
3172
3173         config_terms_list(static_terms, sizeof(static_terms));
3174         /* valid terms */
3175         if (additional_terms) {
3176                 if (asprintf(&str, "valid terms: %s,%s",
3177                              additional_terms, static_terms) < 0)
3178                         goto fail;
3179         } else {
3180                 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3181                         goto fail;
3182         }
3183         return str;
3184
3185 fail:
3186         return NULL;
3187 }