linux/tools/perf/util/parse-events.c
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   1#include <linux/hw_breakpoint.h>
   2#include "util.h"
   3#include "../perf.h"
   4#include "evlist.h"
   5#include "evsel.h"
   6#include "parse-options.h"
   7#include "parse-events.h"
   8#include "exec_cmd.h"
   9#include "string.h"
  10#include "symbol.h"
  11#include "cache.h"
  12#include "header.h"
  13#include "debugfs.h"
  14#include "parse-events-bison.h"
  15#define YY_EXTRA_TYPE int
  16#include "parse-events-flex.h"
  17#include "pmu.h"
  18
  19#define MAX_NAME_LEN 100
  20
  21struct event_symbol {
  22        const char      *symbol;
  23        const char      *alias;
  24};
  25
  26#ifdef PARSER_DEBUG
  27extern int parse_events_debug;
  28#endif
  29int parse_events_parse(void *data, void *scanner);
  30
  31static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  32        [PERF_COUNT_HW_CPU_CYCLES] = {
  33                .symbol = "cpu-cycles",
  34                .alias  = "cycles",
  35        },
  36        [PERF_COUNT_HW_INSTRUCTIONS] = {
  37                .symbol = "instructions",
  38                .alias  = "",
  39        },
  40        [PERF_COUNT_HW_CACHE_REFERENCES] = {
  41                .symbol = "cache-references",
  42                .alias  = "",
  43        },
  44        [PERF_COUNT_HW_CACHE_MISSES] = {
  45                .symbol = "cache-misses",
  46                .alias  = "",
  47        },
  48        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  49                .symbol = "branch-instructions",
  50                .alias  = "branches",
  51        },
  52        [PERF_COUNT_HW_BRANCH_MISSES] = {
  53                .symbol = "branch-misses",
  54                .alias  = "",
  55        },
  56        [PERF_COUNT_HW_BUS_CYCLES] = {
  57                .symbol = "bus-cycles",
  58                .alias  = "",
  59        },
  60        [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  61                .symbol = "stalled-cycles-frontend",
  62                .alias  = "idle-cycles-frontend",
  63        },
  64        [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  65                .symbol = "stalled-cycles-backend",
  66                .alias  = "idle-cycles-backend",
  67        },
  68        [PERF_COUNT_HW_REF_CPU_CYCLES] = {
  69                .symbol = "ref-cycles",
  70                .alias  = "",
  71        },
  72};
  73
  74static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
  75        [PERF_COUNT_SW_CPU_CLOCK] = {
  76                .symbol = "cpu-clock",
  77                .alias  = "",
  78        },
  79        [PERF_COUNT_SW_TASK_CLOCK] = {
  80                .symbol = "task-clock",
  81                .alias  = "",
  82        },
  83        [PERF_COUNT_SW_PAGE_FAULTS] = {
  84                .symbol = "page-faults",
  85                .alias  = "faults",
  86        },
  87        [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
  88                .symbol = "context-switches",
  89                .alias  = "cs",
  90        },
  91        [PERF_COUNT_SW_CPU_MIGRATIONS] = {
  92                .symbol = "cpu-migrations",
  93                .alias  = "migrations",
  94        },
  95        [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
  96                .symbol = "minor-faults",
  97                .alias  = "",
  98        },
  99        [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 100                .symbol = "major-faults",
 101                .alias  = "",
 102        },
 103        [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 104                .symbol = "alignment-faults",
 105                .alias  = "",
 106        },
 107        [PERF_COUNT_SW_EMULATION_FAULTS] = {
 108                .symbol = "emulation-faults",
 109                .alias  = "",
 110        },
 111};
 112
 113#define __PERF_EVENT_FIELD(config, name) \
 114        ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 115
 116#define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
 117#define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
 118#define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
 119#define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
 120
 121#define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 122        while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 123        if (sys_dirent.d_type == DT_DIR &&                                     \
 124           (strcmp(sys_dirent.d_name, ".")) &&                                 \
 125           (strcmp(sys_dirent.d_name, "..")))
 126
 127static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 128{
 129        char evt_path[MAXPATHLEN];
 130        int fd;
 131
 132        snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
 133                        sys_dir->d_name, evt_dir->d_name);
 134        fd = open(evt_path, O_RDONLY);
 135        if (fd < 0)
 136                return -EINVAL;
 137        close(fd);
 138
 139        return 0;
 140}
 141
 142#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 143        while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 144        if (evt_dirent.d_type == DT_DIR &&                                     \
 145           (strcmp(evt_dirent.d_name, ".")) &&                                 \
 146           (strcmp(evt_dirent.d_name, "..")) &&                                \
 147           (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 148
 149#define MAX_EVENT_LENGTH 512
 150
 151
 152struct tracepoint_path *tracepoint_id_to_path(u64 config)
 153{
 154        struct tracepoint_path *path = NULL;
 155        DIR *sys_dir, *evt_dir;
 156        struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 157        char id_buf[24];
 158        int fd;
 159        u64 id;
 160        char evt_path[MAXPATHLEN];
 161        char dir_path[MAXPATHLEN];
 162
 163        if (debugfs_valid_mountpoint(tracing_events_path))
 164                return NULL;
 165
 166        sys_dir = opendir(tracing_events_path);
 167        if (!sys_dir)
 168                return NULL;
 169
 170        for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 171
 172                snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 173                         sys_dirent.d_name);
 174                evt_dir = opendir(dir_path);
 175                if (!evt_dir)
 176                        continue;
 177
 178                for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 179
 180                        snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 181                                 evt_dirent.d_name);
 182                        fd = open(evt_path, O_RDONLY);
 183                        if (fd < 0)
 184                                continue;
 185                        if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 186                                close(fd);
 187                                continue;
 188                        }
 189                        close(fd);
 190                        id = atoll(id_buf);
 191                        if (id == config) {
 192                                closedir(evt_dir);
 193                                closedir(sys_dir);
 194                                path = zalloc(sizeof(*path));
 195                                path->system = malloc(MAX_EVENT_LENGTH);
 196                                if (!path->system) {
 197                                        free(path);
 198                                        return NULL;
 199                                }
 200                                path->name = malloc(MAX_EVENT_LENGTH);
 201                                if (!path->name) {
 202                                        free(path->system);
 203                                        free(path);
 204                                        return NULL;
 205                                }
 206                                strncpy(path->system, sys_dirent.d_name,
 207                                        MAX_EVENT_LENGTH);
 208                                strncpy(path->name, evt_dirent.d_name,
 209                                        MAX_EVENT_LENGTH);
 210                                return path;
 211                        }
 212                }
 213                closedir(evt_dir);
 214        }
 215
 216        closedir(sys_dir);
 217        return NULL;
 218}
 219
 220const char *event_type(int type)
 221{
 222        switch (type) {
 223        case PERF_TYPE_HARDWARE:
 224                return "hardware";
 225
 226        case PERF_TYPE_SOFTWARE:
 227                return "software";
 228
 229        case PERF_TYPE_TRACEPOINT:
 230                return "tracepoint";
 231
 232        case PERF_TYPE_HW_CACHE:
 233                return "hardware-cache";
 234
 235        default:
 236                break;
 237        }
 238
 239        return "unknown";
 240}
 241
 242
 243
 244static int __add_event(struct list_head **_list, int *idx,
 245                       struct perf_event_attr *attr,
 246                       char *name, struct cpu_map *cpus)
 247{
 248        struct perf_evsel *evsel;
 249        struct list_head *list = *_list;
 250
 251        if (!list) {
 252                list = malloc(sizeof(*list));
 253                if (!list)
 254                        return -ENOMEM;
 255                INIT_LIST_HEAD(list);
 256        }
 257
 258        event_attr_init(attr);
 259
 260        evsel = perf_evsel__new(attr, (*idx)++);
 261        if (!evsel) {
 262                free(list);
 263                return -ENOMEM;
 264        }
 265
 266        evsel->cpus = cpus;
 267        if (name)
 268                evsel->name = strdup(name);
 269        list_add_tail(&evsel->node, list);
 270        *_list = list;
 271        return 0;
 272}
 273
 274static int add_event(struct list_head **_list, int *idx,
 275                     struct perf_event_attr *attr, char *name)
 276{
 277        return __add_event(_list, idx, attr, name, NULL);
 278}
 279
 280static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 281{
 282        int i, j;
 283        int n, longest = -1;
 284
 285        for (i = 0; i < size; i++) {
 286                for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 287                        n = strlen(names[i][j]);
 288                        if (n > longest && !strncasecmp(str, names[i][j], n))
 289                                longest = n;
 290                }
 291                if (longest > 0)
 292                        return i;
 293        }
 294
 295        return -1;
 296}
 297
 298int parse_events_add_cache(struct list_head **list, int *idx,
 299                           char *type, char *op_result1, char *op_result2)
 300{
 301        struct perf_event_attr attr;
 302        char name[MAX_NAME_LEN];
 303        int cache_type = -1, cache_op = -1, cache_result = -1;
 304        char *op_result[2] = { op_result1, op_result2 };
 305        int i, n;
 306
 307        /*
 308         * No fallback - if we cannot get a clear cache type
 309         * then bail out:
 310         */
 311        cache_type = parse_aliases(type, perf_evsel__hw_cache,
 312                                   PERF_COUNT_HW_CACHE_MAX);
 313        if (cache_type == -1)
 314                return -EINVAL;
 315
 316        n = snprintf(name, MAX_NAME_LEN, "%s", type);
 317
 318        for (i = 0; (i < 2) && (op_result[i]); i++) {
 319                char *str = op_result[i];
 320
 321                n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 322
 323                if (cache_op == -1) {
 324                        cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 325                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 326                        if (cache_op >= 0) {
 327                                if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 328                                        return -EINVAL;
 329                                continue;
 330                        }
 331                }
 332
 333                if (cache_result == -1) {
 334                        cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 335                                                     PERF_COUNT_HW_CACHE_RESULT_MAX);
 336                        if (cache_result >= 0)
 337                                continue;
 338                }
 339        }
 340
 341        /*
 342         * Fall back to reads:
 343         */
 344        if (cache_op == -1)
 345                cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 346
 347        /*
 348         * Fall back to accesses:
 349         */
 350        if (cache_result == -1)
 351                cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 352
 353        memset(&attr, 0, sizeof(attr));
 354        attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 355        attr.type = PERF_TYPE_HW_CACHE;
 356        return add_event(list, idx, &attr, name);
 357}
 358
 359static int add_tracepoint(struct list_head **listp, int *idx,
 360                          char *sys_name, char *evt_name)
 361{
 362        struct perf_evsel *evsel;
 363        struct list_head *list = *listp;
 364
 365        if (!list) {
 366                list = malloc(sizeof(*list));
 367                if (!list)
 368                        return -ENOMEM;
 369                INIT_LIST_HEAD(list);
 370        }
 371
 372        evsel = perf_evsel__newtp(sys_name, evt_name, (*idx)++);
 373        if (!evsel) {
 374                free(list);
 375                return -ENOMEM;
 376        }
 377
 378        list_add_tail(&evsel->node, list);
 379        *listp = list;
 380        return 0;
 381}
 382
 383static int add_tracepoint_multi_event(struct list_head **list, int *idx,
 384                                      char *sys_name, char *evt_name)
 385{
 386        char evt_path[MAXPATHLEN];
 387        struct dirent *evt_ent;
 388        DIR *evt_dir;
 389        int ret = 0;
 390
 391        snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
 392        evt_dir = opendir(evt_path);
 393        if (!evt_dir) {
 394                perror("Can't open event dir");
 395                return -1;
 396        }
 397
 398        while (!ret && (evt_ent = readdir(evt_dir))) {
 399                if (!strcmp(evt_ent->d_name, ".")
 400                    || !strcmp(evt_ent->d_name, "..")
 401                    || !strcmp(evt_ent->d_name, "enable")
 402                    || !strcmp(evt_ent->d_name, "filter"))
 403                        continue;
 404
 405                if (!strglobmatch(evt_ent->d_name, evt_name))
 406                        continue;
 407
 408                ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
 409        }
 410
 411        closedir(evt_dir);
 412        return ret;
 413}
 414
 415static int add_tracepoint_event(struct list_head **list, int *idx,
 416                                char *sys_name, char *evt_name)
 417{
 418        return strpbrk(evt_name, "*?") ?
 419               add_tracepoint_multi_event(list, idx, sys_name, evt_name) :
 420               add_tracepoint(list, idx, sys_name, evt_name);
 421}
 422
 423static int add_tracepoint_multi_sys(struct list_head **list, int *idx,
 424                                    char *sys_name, char *evt_name)
 425{
 426        struct dirent *events_ent;
 427        DIR *events_dir;
 428        int ret = 0;
 429
 430        events_dir = opendir(tracing_events_path);
 431        if (!events_dir) {
 432                perror("Can't open event dir");
 433                return -1;
 434        }
 435
 436        while (!ret && (events_ent = readdir(events_dir))) {
 437                if (!strcmp(events_ent->d_name, ".")
 438                    || !strcmp(events_ent->d_name, "..")
 439                    || !strcmp(events_ent->d_name, "enable")
 440                    || !strcmp(events_ent->d_name, "header_event")
 441                    || !strcmp(events_ent->d_name, "header_page"))
 442                        continue;
 443
 444                if (!strglobmatch(events_ent->d_name, sys_name))
 445                        continue;
 446
 447                ret = add_tracepoint_event(list, idx, events_ent->d_name,
 448                                           evt_name);
 449        }
 450
 451        closedir(events_dir);
 452        return ret;
 453}
 454
 455int parse_events_add_tracepoint(struct list_head **list, int *idx,
 456                                char *sys, char *event)
 457{
 458        int ret;
 459
 460        ret = debugfs_valid_mountpoint(tracing_events_path);
 461        if (ret)
 462                return ret;
 463
 464        if (strpbrk(sys, "*?"))
 465                return add_tracepoint_multi_sys(list, idx, sys, event);
 466        else
 467                return add_tracepoint_event(list, idx, sys, event);
 468}
 469
 470static int
 471parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 472{
 473        int i;
 474
 475        for (i = 0; i < 3; i++) {
 476                if (!type || !type[i])
 477                        break;
 478
 479#define CHECK_SET_TYPE(bit)             \
 480do {                                    \
 481        if (attr->bp_type & bit)        \
 482                return -EINVAL;         \
 483        else                            \
 484                attr->bp_type |= bit;   \
 485} while (0)
 486
 487                switch (type[i]) {
 488                case 'r':
 489                        CHECK_SET_TYPE(HW_BREAKPOINT_R);
 490                        break;
 491                case 'w':
 492                        CHECK_SET_TYPE(HW_BREAKPOINT_W);
 493                        break;
 494                case 'x':
 495                        CHECK_SET_TYPE(HW_BREAKPOINT_X);
 496                        break;
 497                default:
 498                        return -EINVAL;
 499                }
 500        }
 501
 502#undef CHECK_SET_TYPE
 503
 504        if (!attr->bp_type) /* Default */
 505                attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 506
 507        return 0;
 508}
 509
 510int parse_events_add_breakpoint(struct list_head **list, int *idx,
 511                                void *ptr, char *type)
 512{
 513        struct perf_event_attr attr;
 514
 515        memset(&attr, 0, sizeof(attr));
 516        attr.bp_addr = (unsigned long) ptr;
 517
 518        if (parse_breakpoint_type(type, &attr))
 519                return -EINVAL;
 520
 521        /*
 522         * We should find a nice way to override the access length
 523         * Provide some defaults for now
 524         */
 525        if (attr.bp_type == HW_BREAKPOINT_X)
 526                attr.bp_len = sizeof(long);
 527        else
 528                attr.bp_len = HW_BREAKPOINT_LEN_4;
 529
 530        attr.type = PERF_TYPE_BREAKPOINT;
 531        attr.sample_period = 1;
 532
 533        return add_event(list, idx, &attr, NULL);
 534}
 535
 536static int config_term(struct perf_event_attr *attr,
 537                       struct parse_events_term *term)
 538{
 539#define CHECK_TYPE_VAL(type)                                    \
 540do {                                                            \
 541        if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
 542                return -EINVAL;                                 \
 543} while (0)
 544
 545        switch (term->type_term) {
 546        case PARSE_EVENTS__TERM_TYPE_CONFIG:
 547                CHECK_TYPE_VAL(NUM);
 548                attr->config = term->val.num;
 549                break;
 550        case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 551                CHECK_TYPE_VAL(NUM);
 552                attr->config1 = term->val.num;
 553                break;
 554        case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 555                CHECK_TYPE_VAL(NUM);
 556                attr->config2 = term->val.num;
 557                break;
 558        case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 559                CHECK_TYPE_VAL(NUM);
 560                attr->sample_period = term->val.num;
 561                break;
 562        case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
 563                /*
 564                 * TODO uncomment when the field is available
 565                 * attr->branch_sample_type = term->val.num;
 566                 */
 567                break;
 568        case PARSE_EVENTS__TERM_TYPE_NAME:
 569                CHECK_TYPE_VAL(STR);
 570                break;
 571        default:
 572                return -EINVAL;
 573        }
 574
 575        return 0;
 576#undef CHECK_TYPE_VAL
 577}
 578
 579static int config_attr(struct perf_event_attr *attr,
 580                       struct list_head *head, int fail)
 581{
 582        struct parse_events_term *term;
 583
 584        list_for_each_entry(term, head, list)
 585                if (config_term(attr, term) && fail)
 586                        return -EINVAL;
 587
 588        return 0;
 589}
 590
 591int parse_events_add_numeric(struct list_head **list, int *idx,
 592                             u32 type, u64 config,
 593                             struct list_head *head_config)
 594{
 595        struct perf_event_attr attr;
 596
 597        memset(&attr, 0, sizeof(attr));
 598        attr.type = type;
 599        attr.config = config;
 600
 601        if (head_config &&
 602            config_attr(&attr, head_config, 1))
 603                return -EINVAL;
 604
 605        return add_event(list, idx, &attr, NULL);
 606}
 607
 608static int parse_events__is_name_term(struct parse_events_term *term)
 609{
 610        return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 611}
 612
 613static char *pmu_event_name(struct list_head *head_terms)
 614{
 615        struct parse_events_term *term;
 616
 617        list_for_each_entry(term, head_terms, list)
 618                if (parse_events__is_name_term(term))
 619                        return term->val.str;
 620
 621        return NULL;
 622}
 623
 624int parse_events_add_pmu(struct list_head **list, int *idx,
 625                         char *name, struct list_head *head_config)
 626{
 627        struct perf_event_attr attr;
 628        struct perf_pmu *pmu;
 629
 630        pmu = perf_pmu__find(name);
 631        if (!pmu)
 632                return -EINVAL;
 633
 634        memset(&attr, 0, sizeof(attr));
 635
 636        if (perf_pmu__check_alias(pmu, head_config))
 637                return -EINVAL;
 638
 639        /*
 640         * Configure hardcoded terms first, no need to check
 641         * return value when called with fail == 0 ;)
 642         */
 643        config_attr(&attr, head_config, 0);
 644
 645        if (perf_pmu__config(pmu, &attr, head_config))
 646                return -EINVAL;
 647
 648        return __add_event(list, idx, &attr, pmu_event_name(head_config),
 649                           pmu->cpus);
 650}
 651
 652int parse_events__modifier_group(struct list_head *list,
 653                                 char *event_mod)
 654{
 655        return parse_events__modifier_event(list, event_mod, true);
 656}
 657
 658void parse_events__set_leader(char *name, struct list_head *list)
 659{
 660        struct perf_evsel *leader;
 661
 662        __perf_evlist__set_leader(list);
 663        leader = list_entry(list->next, struct perf_evsel, node);
 664        leader->group_name = name ? strdup(name) : NULL;
 665}
 666
 667void parse_events_update_lists(struct list_head *list_event,
 668                               struct list_head *list_all)
 669{
 670        /*
 671         * Called for single event definition. Update the
 672         * 'all event' list, and reinit the 'single event'
 673         * list, for next event definition.
 674         */
 675        list_splice_tail(list_event, list_all);
 676        free(list_event);
 677}
 678
 679struct event_modifier {
 680        int eu;
 681        int ek;
 682        int eh;
 683        int eH;
 684        int eG;
 685        int precise;
 686        int exclude_GH;
 687};
 688
 689static int get_event_modifier(struct event_modifier *mod, char *str,
 690                               struct perf_evsel *evsel)
 691{
 692        int eu = evsel ? evsel->attr.exclude_user : 0;
 693        int ek = evsel ? evsel->attr.exclude_kernel : 0;
 694        int eh = evsel ? evsel->attr.exclude_hv : 0;
 695        int eH = evsel ? evsel->attr.exclude_host : 0;
 696        int eG = evsel ? evsel->attr.exclude_guest : 0;
 697        int precise = evsel ? evsel->attr.precise_ip : 0;
 698
 699        int exclude = eu | ek | eh;
 700        int exclude_GH = evsel ? evsel->exclude_GH : 0;
 701
 702        memset(mod, 0, sizeof(*mod));
 703
 704        while (*str) {
 705                if (*str == 'u') {
 706                        if (!exclude)
 707                                exclude = eu = ek = eh = 1;
 708                        eu = 0;
 709                } else if (*str == 'k') {
 710                        if (!exclude)
 711                                exclude = eu = ek = eh = 1;
 712                        ek = 0;
 713                } else if (*str == 'h') {
 714                        if (!exclude)
 715                                exclude = eu = ek = eh = 1;
 716                        eh = 0;
 717                } else if (*str == 'G') {
 718                        if (!exclude_GH)
 719                                exclude_GH = eG = eH = 1;
 720                        eG = 0;
 721                } else if (*str == 'H') {
 722                        if (!exclude_GH)
 723                                exclude_GH = eG = eH = 1;
 724                        eH = 0;
 725                } else if (*str == 'p') {
 726                        precise++;
 727                        /* use of precise requires exclude_guest */
 728                        if (!exclude_GH)
 729                                eG = 1;
 730                } else
 731                        break;
 732
 733                ++str;
 734        }
 735
 736        /*
 737         * precise ip:
 738         *
 739         *  0 - SAMPLE_IP can have arbitrary skid
 740         *  1 - SAMPLE_IP must have constant skid
 741         *  2 - SAMPLE_IP requested to have 0 skid
 742         *  3 - SAMPLE_IP must have 0 skid
 743         *
 744         *  See also PERF_RECORD_MISC_EXACT_IP
 745         */
 746        if (precise > 3)
 747                return -EINVAL;
 748
 749        mod->eu = eu;
 750        mod->ek = ek;
 751        mod->eh = eh;
 752        mod->eH = eH;
 753        mod->eG = eG;
 754        mod->precise = precise;
 755        mod->exclude_GH = exclude_GH;
 756        return 0;
 757}
 758
 759/*
 760 * Basic modifier sanity check to validate it contains only one
 761 * instance of any modifier (apart from 'p') present.
 762 */
 763static int check_modifier(char *str)
 764{
 765        char *p = str;
 766
 767        /* The sizeof includes 0 byte as well. */
 768        if (strlen(str) > (sizeof("ukhGHppp") - 1))
 769                return -1;
 770
 771        while (*p) {
 772                if (*p != 'p' && strchr(p + 1, *p))
 773                        return -1;
 774                p++;
 775        }
 776
 777        return 0;
 778}
 779
 780int parse_events__modifier_event(struct list_head *list, char *str, bool add)
 781{
 782        struct perf_evsel *evsel;
 783        struct event_modifier mod;
 784
 785        if (str == NULL)
 786                return 0;
 787
 788        if (check_modifier(str))
 789                return -EINVAL;
 790
 791        if (!add && get_event_modifier(&mod, str, NULL))
 792                return -EINVAL;
 793
 794        list_for_each_entry(evsel, list, node) {
 795
 796                if (add && get_event_modifier(&mod, str, evsel))
 797                        return -EINVAL;
 798
 799                evsel->attr.exclude_user   = mod.eu;
 800                evsel->attr.exclude_kernel = mod.ek;
 801                evsel->attr.exclude_hv     = mod.eh;
 802                evsel->attr.precise_ip     = mod.precise;
 803                evsel->attr.exclude_host   = mod.eH;
 804                evsel->attr.exclude_guest  = mod.eG;
 805                evsel->exclude_GH          = mod.exclude_GH;
 806        }
 807
 808        return 0;
 809}
 810
 811int parse_events_name(struct list_head *list, char *name)
 812{
 813        struct perf_evsel *evsel;
 814
 815        list_for_each_entry(evsel, list, node) {
 816                if (!evsel->name)
 817                        evsel->name = strdup(name);
 818        }
 819
 820        return 0;
 821}
 822
 823static int parse_events__scanner(const char *str, void *data, int start_token)
 824{
 825        YY_BUFFER_STATE buffer;
 826        void *scanner;
 827        int ret;
 828
 829        ret = parse_events_lex_init_extra(start_token, &scanner);
 830        if (ret)
 831                return ret;
 832
 833        buffer = parse_events__scan_string(str, scanner);
 834
 835#ifdef PARSER_DEBUG
 836        parse_events_debug = 1;
 837#endif
 838        ret = parse_events_parse(data, scanner);
 839
 840        parse_events__flush_buffer(buffer, scanner);
 841        parse_events__delete_buffer(buffer, scanner);
 842        parse_events_lex_destroy(scanner);
 843        return ret;
 844}
 845
 846/*
 847 * parse event config string, return a list of event terms.
 848 */
 849int parse_events_terms(struct list_head *terms, const char *str)
 850{
 851        struct parse_events_terms data = {
 852                .terms = NULL,
 853        };
 854        int ret;
 855
 856        ret = parse_events__scanner(str, &data, PE_START_TERMS);
 857        if (!ret) {
 858                list_splice(data.terms, terms);
 859                free(data.terms);
 860                return 0;
 861        }
 862
 863        parse_events__free_terms(data.terms);
 864        return ret;
 865}
 866
 867int parse_events(struct perf_evlist *evlist, const char *str)
 868{
 869        struct parse_events_evlist data = {
 870                .list = LIST_HEAD_INIT(data.list),
 871                .idx  = evlist->nr_entries,
 872        };
 873        int ret;
 874
 875        ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 876        if (!ret) {
 877                int entries = data.idx - evlist->nr_entries;
 878                perf_evlist__splice_list_tail(evlist, &data.list, entries);
 879                evlist->nr_groups += data.nr_groups;
 880                return 0;
 881        }
 882
 883        /*
 884         * There are 2 users - builtin-record and builtin-test objects.
 885         * Both call perf_evlist__delete in case of error, so we dont
 886         * need to bother.
 887         */
 888        return ret;
 889}
 890
 891int parse_events_option(const struct option *opt, const char *str,
 892                        int unset __maybe_unused)
 893{
 894        struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 895        int ret = parse_events(evlist, str);
 896
 897        if (ret) {
 898                fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 899                fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 900        }
 901        return ret;
 902}
 903
 904int parse_filter(const struct option *opt, const char *str,
 905                 int unset __maybe_unused)
 906{
 907        struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 908        struct perf_evsel *last = NULL;
 909
 910        if (evlist->nr_entries > 0)
 911                last = perf_evlist__last(evlist);
 912
 913        if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 914                fprintf(stderr,
 915                        "-F option should follow a -e tracepoint option\n");
 916                return -1;
 917        }
 918
 919        last->filter = strdup(str);
 920        if (last->filter == NULL) {
 921                fprintf(stderr, "not enough memory to hold filter string\n");
 922                return -1;
 923        }
 924
 925        return 0;
 926}
 927
 928static const char * const event_type_descriptors[] = {
 929        "Hardware event",
 930        "Software event",
 931        "Tracepoint event",
 932        "Hardware cache event",
 933        "Raw hardware event descriptor",
 934        "Hardware breakpoint",
 935};
 936
 937/*
 938 * Print the events from <debugfs_mount_point>/tracing/events
 939 */
 940
 941void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
 942                             bool name_only)
 943{
 944        DIR *sys_dir, *evt_dir;
 945        struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 946        char evt_path[MAXPATHLEN];
 947        char dir_path[MAXPATHLEN];
 948
 949        if (debugfs_valid_mountpoint(tracing_events_path))
 950                return;
 951
 952        sys_dir = opendir(tracing_events_path);
 953        if (!sys_dir)
 954                return;
 955
 956        for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 957                if (subsys_glob != NULL && 
 958                    !strglobmatch(sys_dirent.d_name, subsys_glob))
 959                        continue;
 960
 961                snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 962                         sys_dirent.d_name);
 963                evt_dir = opendir(dir_path);
 964                if (!evt_dir)
 965                        continue;
 966
 967                for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 968                        if (event_glob != NULL && 
 969                            !strglobmatch(evt_dirent.d_name, event_glob))
 970                                continue;
 971
 972                        if (name_only) {
 973                                printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
 974                                continue;
 975                        }
 976
 977                        snprintf(evt_path, MAXPATHLEN, "%s:%s",
 978                                 sys_dirent.d_name, evt_dirent.d_name);
 979                        printf("  %-50s [%s]\n", evt_path,
 980                                event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 981                }
 982                closedir(evt_dir);
 983        }
 984        closedir(sys_dir);
 985}
 986
 987/*
 988 * Check whether event is in <debugfs_mount_point>/tracing/events
 989 */
 990
 991int is_valid_tracepoint(const char *event_string)
 992{
 993        DIR *sys_dir, *evt_dir;
 994        struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 995        char evt_path[MAXPATHLEN];
 996        char dir_path[MAXPATHLEN];
 997
 998        if (debugfs_valid_mountpoint(tracing_events_path))
 999                return 0;
1000
1001        sys_dir = opendir(tracing_events_path);
1002        if (!sys_dir)
1003                return 0;
1004
1005        for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1006
1007                snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1008                         sys_dirent.d_name);
1009                evt_dir = opendir(dir_path);
1010                if (!evt_dir)
1011                        continue;
1012
1013                for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1014                        snprintf(evt_path, MAXPATHLEN, "%s:%s",
1015                                 sys_dirent.d_name, evt_dirent.d_name);
1016                        if (!strcmp(evt_path, event_string)) {
1017                                closedir(evt_dir);
1018                                closedir(sys_dir);
1019                                return 1;
1020                        }
1021                }
1022                closedir(evt_dir);
1023        }
1024        closedir(sys_dir);
1025        return 0;
1026}
1027
1028static void __print_events_type(u8 type, struct event_symbol *syms,
1029                                unsigned max)
1030{
1031        char name[64];
1032        unsigned i;
1033
1034        for (i = 0; i < max ; i++, syms++) {
1035                if (strlen(syms->alias))
1036                        snprintf(name, sizeof(name),  "%s OR %s",
1037                                 syms->symbol, syms->alias);
1038                else
1039                        snprintf(name, sizeof(name), "%s", syms->symbol);
1040
1041                printf("  %-50s [%s]\n", name,
1042                        event_type_descriptors[type]);
1043        }
1044}
1045
1046void print_events_type(u8 type)
1047{
1048        if (type == PERF_TYPE_SOFTWARE)
1049                __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
1050        else
1051                __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
1052}
1053
1054int print_hwcache_events(const char *event_glob, bool name_only)
1055{
1056        unsigned int type, op, i, printed = 0;
1057        char name[64];
1058
1059        for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1060                for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1061                        /* skip invalid cache type */
1062                        if (!perf_evsel__is_cache_op_valid(type, op))
1063                                continue;
1064
1065                        for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1066                                __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1067                                                                        name, sizeof(name));
1068                                if (event_glob != NULL && !strglobmatch(name, event_glob))
1069                                        continue;
1070
1071                                if (name_only)
1072                                        printf("%s ", name);
1073                                else
1074                                        printf("  %-50s [%s]\n", name,
1075                                               event_type_descriptors[PERF_TYPE_HW_CACHE]);
1076                                ++printed;
1077                        }
1078                }
1079        }
1080
1081        return printed;
1082}
1083
1084static void print_symbol_events(const char *event_glob, unsigned type,
1085                                struct event_symbol *syms, unsigned max,
1086                                bool name_only)
1087{
1088        unsigned i, printed = 0;
1089        char name[MAX_NAME_LEN];
1090
1091        for (i = 0; i < max; i++, syms++) {
1092
1093                if (event_glob != NULL && 
1094                    !(strglobmatch(syms->symbol, event_glob) ||
1095                      (syms->alias && strglobmatch(syms->alias, event_glob))))
1096                        continue;
1097
1098                if (name_only) {
1099                        printf("%s ", syms->symbol);
1100                        continue;
1101                }
1102
1103                if (strlen(syms->alias))
1104                        snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1105                else
1106                        strncpy(name, syms->symbol, MAX_NAME_LEN);
1107
1108                printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
1109
1110                printed++;
1111        }
1112
1113        if (printed)
1114                printf("\n");
1115}
1116
1117/*
1118 * Print the help text for the event symbols:
1119 */
1120void print_events(const char *event_glob, bool name_only)
1121{
1122        if (!name_only) {
1123                printf("\n");
1124                printf("List of pre-defined events (to be used in -e):\n");
1125        }
1126
1127        print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1128                            event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1129
1130        print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1131                            event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1132
1133        print_hwcache_events(event_glob, name_only);
1134
1135        if (event_glob != NULL)
1136                return;
1137
1138        if (!name_only) {
1139                printf("\n");
1140                printf("  %-50s [%s]\n",
1141                       "rNNN",
1142                       event_type_descriptors[PERF_TYPE_RAW]);
1143                printf("  %-50s [%s]\n",
1144                       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1145                       event_type_descriptors[PERF_TYPE_RAW]);
1146                printf("   (see 'man perf-list' on how to encode it)\n");
1147                printf("\n");
1148
1149                printf("  %-50s [%s]\n",
1150                       "mem:<addr>[:access]",
1151                        event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1152                printf("\n");
1153        }
1154
1155        print_tracepoint_events(NULL, NULL, name_only);
1156}
1157
1158int parse_events__is_hardcoded_term(struct parse_events_term *term)
1159{
1160        return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1161}
1162
1163static int new_term(struct parse_events_term **_term, int type_val,
1164                    int type_term, char *config,
1165                    char *str, u64 num)
1166{
1167        struct parse_events_term *term;
1168
1169        term = zalloc(sizeof(*term));
1170        if (!term)
1171                return -ENOMEM;
1172
1173        INIT_LIST_HEAD(&term->list);
1174        term->type_val  = type_val;
1175        term->type_term = type_term;
1176        term->config = config;
1177
1178        switch (type_val) {
1179        case PARSE_EVENTS__TERM_TYPE_NUM:
1180                term->val.num = num;
1181                break;
1182        case PARSE_EVENTS__TERM_TYPE_STR:
1183                term->val.str = str;
1184                break;
1185        default:
1186                return -EINVAL;
1187        }
1188
1189        *_term = term;
1190        return 0;
1191}
1192
1193int parse_events_term__num(struct parse_events_term **term,
1194                           int type_term, char *config, u64 num)
1195{
1196        return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1197                        config, NULL, num);
1198}
1199
1200int parse_events_term__str(struct parse_events_term **term,
1201                           int type_term, char *config, char *str)
1202{
1203        return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1204                        config, str, 0);
1205}
1206
1207int parse_events_term__sym_hw(struct parse_events_term **term,
1208                              char *config, unsigned idx)
1209{
1210        struct event_symbol *sym;
1211
1212        BUG_ON(idx >= PERF_COUNT_HW_MAX);
1213        sym = &event_symbols_hw[idx];
1214
1215        if (config)
1216                return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1217                                PARSE_EVENTS__TERM_TYPE_USER, config,
1218                                (char *) sym->symbol, 0);
1219        else
1220                return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1221                                PARSE_EVENTS__TERM_TYPE_USER,
1222                                (char *) "event", (char *) sym->symbol, 0);
1223}
1224
1225int parse_events_term__clone(struct parse_events_term **new,
1226                             struct parse_events_term *term)
1227{
1228        return new_term(new, term->type_val, term->type_term, term->config,
1229                        term->val.str, term->val.num);
1230}
1231
1232void parse_events__free_terms(struct list_head *terms)
1233{
1234        struct parse_events_term *term, *h;
1235
1236        list_for_each_entry_safe(term, h, terms, list)
1237                free(term);
1238
1239        free(terms);
1240}
1241