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