tools/perf/util/parse-events.c

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