tools/perf/util/parse-events.c

   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 <lk/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
  21 struct event_symbol {
  22         const char      *symbol;
  23         const char      *alias;
  24 };
  25
  26 #ifdef PARSER_DEBUG
  27 extern int parse_events_debug;
  28 #endif
  29 int parse_events_parse(void *data, void *scanner);
  30
  31 static 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
  74 static 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
 127 static 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
 152 struct 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
 220 const 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
 244 static 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
 274 static 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
 280 static 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
 298 int 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
 359 static 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
 383 static 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
 415 static 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
 423 static 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
 455 int 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
 470 static int
 471 parse_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)             \
 480 do {                                    \
 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
 510 int 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
 536 static int config_term(struct perf_event_attr *attr,
 537                        struct parse_events_term *term)
 538 {
 539 #define CHECK_TYPE_VAL(type)                                    \
 540 do {                                                            \
 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
 579 static 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
 591 int 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
 608 static int parse_events__is_name_term(struct parse_events_term *term)
 609 {
 610         return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 611 }
 612
 613 static 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
 624 int 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
 652 int 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
 658 void 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
 667 void 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
 679 struct 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
 689 static 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  */
 763 static 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
 780 int 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
 811 int 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
 823 static 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  */
 849 int 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         if (data.terms)
 864                 parse_events__free_terms(data.terms);
 865         return ret;
 866 }
 867
 868 int parse_events(struct perf_evlist *evlist, const char *str)
 869 {
 870         struct parse_events_evlist data = {
 871                 .list = LIST_HEAD_INIT(data.list),
 872                 .idx  = evlist->nr_entries,
 873         };
 874         int ret;
 875
 876         ret = parse_events__scanner(str, &data, PE_START_EVENTS);
 877         if (!ret) {
 878                 int entries = data.idx - evlist->nr_entries;
 879                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
 880                 evlist->nr_groups += data.nr_groups;
 881                 return 0;
 882         }
 883
 884         /*
 885          * There are 2 users - builtin-record and builtin-test objects.
 886          * Both call perf_evlist__delete in case of error, so we dont
 887          * need to bother.
 888          */
 889         return ret;
 890 }
 891
 892 int parse_events_option(const struct option *opt, const char *str,
 893                         int unset __maybe_unused)
 894 {
 895         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 896         int ret = parse_events(evlist, str);
 897
 898         if (ret) {
 899                 fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
 900                 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 901         }
 902         return ret;
 903 }
 904
 905 int parse_filter(const struct option *opt, const char *str,
 906                  int unset __maybe_unused)
 907 {
 908         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 909         struct perf_evsel *last = NULL;
 910
 911         if (evlist->nr_entries > 0)
 912                 last = perf_evlist__last(evlist);
 913
 914         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 915                 fprintf(stderr,
 916                         "-F option should follow a -e tracepoint option\n");
 917                 return -1;
 918         }
 919
 920         last->filter = strdup(str);
 921         if (last->filter == NULL) {
 922                 fprintf(stderr, "not enough memory to hold filter string\n");
 923                 return -1;
 924         }
 925
 926         return 0;
 927 }
 928
 929 static const char * const event_type_descriptors[] = {
 930         "Hardware event",
 931         "Software event",
 932         "Tracepoint event",
 933         "Hardware cache event",
 934         "Raw hardware event descriptor",
 935         "Hardware breakpoint",
 936 };
 937
 938 /*
 939  * Print the events from <debugfs_mount_point>/tracing/events
 940  */
 941
 942 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
 943                              bool name_only)
 944 {
 945         DIR *sys_dir, *evt_dir;
 946         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 947         char evt_path[MAXPATHLEN];
 948         char dir_path[MAXPATHLEN];
 949
 950         if (debugfs_valid_mountpoint(tracing_events_path))
 951                 return;
 952
 953         sys_dir = opendir(tracing_events_path);
 954         if (!sys_dir)
 955                 return;
 956
 957         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 958                 if (subsys_glob != NULL &&
 959                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 960                         continue;
 961
 962                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
 963                          sys_dirent.d_name);
 964                 evt_dir = opendir(dir_path);
 965                 if (!evt_dir)
 966                         continue;
 967
 968                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 969                         if (event_glob != NULL &&
 970                             !strglobmatch(evt_dirent.d_name, event_glob))
 971                                 continue;
 972
 973                         if (name_only) {
 974                                 printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
 975                                 continue;
 976                         }
 977
 978                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 979                                  sys_dirent.d_name, evt_dirent.d_name);
 980                         printf("  %-50s [%s]\n", evt_path,
 981                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 982                 }
 983                 closedir(evt_dir);
 984         }
 985         closedir(sys_dir);
 986 }
 987
 988 /*
 989  * Check whether event is in <debugfs_mount_point>/tracing/events
 990  */
 991
 992 int is_valid_tracepoint(const char *event_string)
 993 {
 994         DIR *sys_dir, *evt_dir;
 995         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 996         char evt_path[MAXPATHLEN];
 997         char dir_path[MAXPATHLEN];
 998
 999         if (debugfs_valid_mountpoint(tracing_events_path))
1000                 return 0;
1001
1002         sys_dir = opendir(tracing_events_path);
1003         if (!sys_dir)
1004                 return 0;
1005
1006         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1007
1008                 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1009                          sys_dirent.d_name);
1010                 evt_dir = opendir(dir_path);
1011                 if (!evt_dir)
1012                         continue;
1013
1014                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1015                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
1016                                  sys_dirent.d_name, evt_dirent.d_name);
1017                         if (!strcmp(evt_path, event_string)) {
1018                                 closedir(evt_dir);
1019                                 closedir(sys_dir);
1020                                 return 1;
1021                         }
1022                 }
1023                 closedir(evt_dir);
1024         }
1025         closedir(sys_dir);
1026         return 0;
1027 }
1028
1029 static void __print_events_type(u8 type, struct event_symbol *syms,
1030                                 unsigned max)
1031 {
1032         char name[64];
1033         unsigned i;
1034
1035         for (i = 0; i < max ; i++, syms++) {
1036                 if (strlen(syms->alias))
1037                         snprintf(name, sizeof(name),  "%s OR %s",
1038                                  syms->symbol, syms->alias);
1039                 else
1040                         snprintf(name, sizeof(name), "%s", syms->symbol);
1041
1042                 printf("  %-50s [%s]\n", name,
1043                         event_type_descriptors[type]);
1044         }
1045 }
1046
1047 void print_events_type(u8 type)
1048 {
1049         if (type == PERF_TYPE_SOFTWARE)
1050                 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
1051         else
1052                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
1053 }
1054
1055 int print_hwcache_events(const char *event_glob, bool name_only)
1056 {
1057         unsigned int type, op, i, printed = 0;
1058         char name[64];
1059
1060         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1061                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1062                         /* skip invalid cache type */
1063                         if (!perf_evsel__is_cache_op_valid(type, op))
1064                                 continue;
1065
1066                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1067                                 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1068                                                                         name, sizeof(name));
1069                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1070                                         continue;
1071
1072                                 if (name_only)
1073                                         printf("%s ", name);
1074                                 else
1075                                         printf("  %-50s [%s]\n", name,
1076                                                event_type_descriptors[PERF_TYPE_HW_CACHE]);
1077                                 ++printed;
1078                         }
1079                 }
1080         }
1081
1082         return printed;
1083 }
1084
1085 static void print_symbol_events(const char *event_glob, unsigned type,
1086                                 struct event_symbol *syms, unsigned max,
1087                                 bool name_only)
1088 {
1089         unsigned i, printed = 0;
1090         char name[MAX_NAME_LEN];
1091
1092         for (i = 0; i < max; i++, syms++) {
1093
1094                 if (event_glob != NULL &&
1095                     !(strglobmatch(syms->symbol, event_glob) ||
1096                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1097                         continue;
1098
1099                 if (name_only) {
1100                         printf("%s ", syms->symbol);
1101                         continue;
1102                 }
1103
1104                 if (strlen(syms->alias))
1105                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1106                 else
1107                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1108
1109                 printf("  %-50s [%s]\n", name, event_type_descriptors[type]);
1110
1111                 printed++;
1112         }
1113
1114         if (printed)
1115                 printf("\n");
1116 }
1117
1118 /*
1119  * Print the help text for the event symbols:
1120  */
1121 void print_events(const char *event_glob, bool name_only)
1122 {
1123         if (!name_only) {
1124                 printf("\n");
1125                 printf("List of pre-defined events (to be used in -e):\n");
1126         }
1127
1128         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1129                             event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1130
1131         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1132                             event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1133
1134         print_hwcache_events(event_glob, name_only);
1135
1136         if (event_glob != NULL)
1137                 return;
1138
1139         if (!name_only) {
1140                 printf("\n");
1141                 printf("  %-50s [%s]\n",
1142                        "rNNN",
1143                        event_type_descriptors[PERF_TYPE_RAW]);
1144                 printf("  %-50s [%s]\n",
1145                        "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1146                        event_type_descriptors[PERF_TYPE_RAW]);
1147                 printf("   (see 'man perf-list' on how to encode it)\n");
1148                 printf("\n");
1149
1150                 printf("  %-50s [%s]\n",
1151                        "mem:<addr>[:access]",
1152                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1153                 printf("\n");
1154         }
1155
1156         print_tracepoint_events(NULL, NULL, name_only);
1157 }
1158
1159 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1160 {
1161         return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1162 }
1163
1164 static int new_term(struct parse_events_term **_term, int type_val,
1165                     int type_term, char *config,
1166                     char *str, u64 num)
1167 {
1168         struct parse_events_term *term;
1169
1170         term = zalloc(sizeof(*term));
1171         if (!term)
1172                 return -ENOMEM;
1173
1174         INIT_LIST_HEAD(&term->list);
1175         term->type_val  = type_val;
1176         term->type_term = type_term;
1177         term->config = config;
1178
1179         switch (type_val) {
1180         case PARSE_EVENTS__TERM_TYPE_NUM:
1181                 term->val.num = num;
1182                 break;
1183         case PARSE_EVENTS__TERM_TYPE_STR:
1184                 term->val.str = str;
1185                 break;
1186         default:
1187                 free(term);
1188                 return -EINVAL;
1189         }
1190
1191         *_term = term;
1192         return 0;
1193 }
1194
1195 int parse_events_term__num(struct parse_events_term **term,
1196                            int type_term, char *config, u64 num)
1197 {
1198         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1199                         config, NULL, num);
1200 }
1201
1202 int parse_events_term__str(struct parse_events_term **term,
1203                            int type_term, char *config, char *str)
1204 {
1205         return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1206                         config, str, 0);
1207 }
1208
1209 int parse_events_term__sym_hw(struct parse_events_term **term,
1210                               char *config, unsigned idx)
1211 {
1212         struct event_symbol *sym;
1213
1214         BUG_ON(idx >= PERF_COUNT_HW_MAX);
1215         sym = &event_symbols_hw[idx];
1216
1217         if (config)
1218                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1219                                 PARSE_EVENTS__TERM_TYPE_USER, config,
1220                                 (char *) sym->symbol, 0);
1221         else
1222                 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1223                                 PARSE_EVENTS__TERM_TYPE_USER,
1224                                 (char *) "event", (char *) sym->symbol, 0);
1225 }
1226
1227 int parse_events_term__clone(struct parse_events_term **new,
1228                              struct parse_events_term *term)
1229 {
1230         return new_term(new, term->type_val, term->type_term, term->config,
1231                         term->val.str, term->val.num);
1232 }
1233
1234 void parse_events__free_terms(struct list_head *terms)
1235 {
1236         struct parse_events_term *term, *h;
1237
1238         list_for_each_entry_safe(term, h, terms, list)
1239                 free(term);
1240
1241         free(terms);
1242 }