tools/perf/util/parse-events.c

   1
   2 #include "util.h"
   3 #include "../perf.h"
   4 #include "parse-options.h"
   5 #include "parse-events.h"
   6 #include "exec_cmd.h"
   7 #include "string.h"
   8 #include "cache.h"
   9 #include "header.h"
  10
  11 int                             nr_counters;
  12
  13 struct perf_event_attr          attrs[MAX_COUNTERS];
  14 char                            *filters[MAX_COUNTERS];
  15
  16 struct event_symbol {
  17         u8              type;
  18         u64             config;
  19         const char      *symbol;
  20         const char      *alias;
  21 };
  22
  23 enum event_result {
  24         EVT_FAILED,
  25         EVT_HANDLED,
  26         EVT_HANDLED_ALL
  27 };
  28
  29 char debugfs_path[MAXPATHLEN];
  30
  31 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
  32 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
  33
  34 static struct event_symbol event_symbols[] = {
  35   { CHW(CPU_CYCLES),            "cpu-cycles",           "cycles"        },
  36   { CHW(INSTRUCTIONS),          "instructions",         ""              },
  37   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
  38   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
  39   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
  40   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
  41   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
  42
  43   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
  44   { CSW(TASK_CLOCK),            "task-clock",           ""              },
  45   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
  46   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
  47   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
  48   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
  49   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
  50 };
  51
  52 #define __PERF_EVENT_FIELD(config, name) \
  53         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  54
  55 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
  56 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
  57 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
  58 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
  59
  60 static const char *hw_event_names[] = {
  61         "cycles",
  62         "instructions",
  63         "cache-references",
  64         "cache-misses",
  65         "branches",
  66         "branch-misses",
  67         "bus-cycles",
  68 };
  69
  70 static const char *sw_event_names[] = {
  71         "cpu-clock-msecs",
  72         "task-clock-msecs",
  73         "page-faults",
  74         "context-switches",
  75         "CPU-migrations",
  76         "minor-faults",
  77         "major-faults",
  78 };
  79
  80 #define MAX_ALIASES 8
  81
  82 static const char *hw_cache[][MAX_ALIASES] = {
  83  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  84  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  85  { "LLC",       "L2"                                                    },
  86  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  87  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  88  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  89 };
  90
  91 static const char *hw_cache_op[][MAX_ALIASES] = {
  92  { "load",      "loads",        "read",                                 },
  93  { "store",     "stores",       "write",                                },
  94  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
  95 };
  96
  97 static const char *hw_cache_result[][MAX_ALIASES] = {
  98  { "refs",      "Reference",    "ops",          "access",               },
  99  { "misses",    "miss",                                                 },
 100 };
 101
 102 #define C(x)            PERF_COUNT_HW_CACHE_##x
 103 #define CACHE_READ      (1 << C(OP_READ))
 104 #define CACHE_WRITE     (1 << C(OP_WRITE))
 105 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 106 #define COP(x)          (1 << x)
 107
 108 /*
 109  * cache operartion stat
 110  * L1I : Read and prefetch only
 111  * ITLB and BPU : Read-only
 112  */
 113 static unsigned long hw_cache_stat[C(MAX)] = {
 114  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 115  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 116  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 117  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 118  [C(ITLB)]      = (CACHE_READ),
 119  [C(BPU)]       = (CACHE_READ),
 120 };
 121
 122 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 123         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 124         if (sys_dirent.d_type == DT_DIR &&                                     \
 125            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 126            (strcmp(sys_dirent.d_name, "..")))
 127
 128 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 129 {
 130         char evt_path[MAXPATHLEN];
 131         int fd;
 132
 133         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 134                         sys_dir->d_name, evt_dir->d_name);
 135         fd = open(evt_path, O_RDONLY);
 136         if (fd < 0)
 137                 return -EINVAL;
 138         close(fd);
 139
 140         return 0;
 141 }
 142
 143 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 144         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 145         if (evt_dirent.d_type == DT_DIR &&                                     \
 146            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 147            (strcmp(evt_dirent.d_name, "..")) &&                                \
 148            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 149
 150 #define MAX_EVENT_LENGTH 512
 151
 152 int valid_debugfs_mount(const char *debugfs)
 153 {
 154         struct statfs st_fs;
 155
 156         if (statfs(debugfs, &st_fs) < 0)
 157                 return -ENOENT;
 158         else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
 159                 return -ENOENT;
 160         return 0;
 161 }
 162
 163 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 164 {
 165         struct tracepoint_path *path = NULL;
 166         DIR *sys_dir, *evt_dir;
 167         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 168         char id_buf[4];
 169         int fd;
 170         u64 id;
 171         char evt_path[MAXPATHLEN];
 172         char dir_path[MAXPATHLEN];
 173
 174         if (valid_debugfs_mount(debugfs_path))
 175                 return NULL;
 176
 177         sys_dir = opendir(debugfs_path);
 178         if (!sys_dir)
 179                 return NULL;
 180
 181         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 182
 183                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 184                          sys_dirent.d_name);
 185                 evt_dir = opendir(dir_path);
 186                 if (!evt_dir)
 187                         continue;
 188
 189                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 190
 191                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 192                                  evt_dirent.d_name);
 193                         fd = open(evt_path, O_RDONLY);
 194                         if (fd < 0)
 195                                 continue;
 196                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 197                                 close(fd);
 198                                 continue;
 199                         }
 200                         close(fd);
 201                         id = atoll(id_buf);
 202                         if (id == config) {
 203                                 closedir(evt_dir);
 204                                 closedir(sys_dir);
 205                                 path = calloc(1, sizeof(path));
 206                                 path->system = malloc(MAX_EVENT_LENGTH);
 207                                 if (!path->system) {
 208                                         free(path);
 209                                         return NULL;
 210                                 }
 211                                 path->name = malloc(MAX_EVENT_LENGTH);
 212                                 if (!path->name) {
 213                                         free(path->system);
 214                                         free(path);
 215                                         return NULL;
 216                                 }
 217                                 strncpy(path->system, sys_dirent.d_name,
 218                                         MAX_EVENT_LENGTH);
 219                                 strncpy(path->name, evt_dirent.d_name,
 220                                         MAX_EVENT_LENGTH);
 221                                 return path;
 222                         }
 223                 }
 224                 closedir(evt_dir);
 225         }
 226
 227         closedir(sys_dir);
 228         return NULL;
 229 }
 230
 231 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 232 static const char *tracepoint_id_to_name(u64 config)
 233 {
 234         static char buf[TP_PATH_LEN];
 235         struct tracepoint_path *path;
 236
 237         path = tracepoint_id_to_path(config);
 238         if (path) {
 239                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 240                 free(path->name);
 241                 free(path->system);
 242                 free(path);
 243         } else
 244                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 245
 246         return buf;
 247 }
 248
 249 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 250 {
 251         if (hw_cache_stat[cache_type] & COP(cache_op))
 252                 return 1;       /* valid */
 253         else
 254                 return 0;       /* invalid */
 255 }
 256
 257 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 258 {
 259         static char name[50];
 260
 261         if (cache_result) {
 262                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 263                         hw_cache_op[cache_op][0],
 264                         hw_cache_result[cache_result][0]);
 265         } else {
 266                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 267                         hw_cache_op[cache_op][1]);
 268         }
 269
 270         return name;
 271 }
 272
 273 const char *event_name(int counter)
 274 {
 275         u64 config = attrs[counter].config;
 276         int type = attrs[counter].type;
 277
 278         return __event_name(type, config);
 279 }
 280
 281 const char *__event_name(int type, u64 config)
 282 {
 283         static char buf[32];
 284
 285         if (type == PERF_TYPE_RAW) {
 286                 sprintf(buf, "raw 0x%llx", config);
 287                 return buf;
 288         }
 289
 290         switch (type) {
 291         case PERF_TYPE_HARDWARE:
 292                 if (config < PERF_COUNT_HW_MAX)
 293                         return hw_event_names[config];
 294                 return "unknown-hardware";
 295
 296         case PERF_TYPE_HW_CACHE: {
 297                 u8 cache_type, cache_op, cache_result;
 298
 299                 cache_type   = (config >>  0) & 0xff;
 300                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 301                         return "unknown-ext-hardware-cache-type";
 302
 303                 cache_op     = (config >>  8) & 0xff;
 304                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 305                         return "unknown-ext-hardware-cache-op";
 306
 307                 cache_result = (config >> 16) & 0xff;
 308                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 309                         return "unknown-ext-hardware-cache-result";
 310
 311                 if (!is_cache_op_valid(cache_type, cache_op))
 312                         return "invalid-cache";
 313
 314                 return event_cache_name(cache_type, cache_op, cache_result);
 315         }
 316
 317         case PERF_TYPE_SOFTWARE:
 318                 if (config < PERF_COUNT_SW_MAX)
 319                         return sw_event_names[config];
 320                 return "unknown-software";
 321
 322         case PERF_TYPE_TRACEPOINT:
 323                 return tracepoint_id_to_name(config);
 324
 325         default:
 326                 break;
 327         }
 328
 329         return "unknown";
 330 }
 331
 332 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 333 {
 334         int i, j;
 335         int n, longest = -1;
 336
 337         for (i = 0; i < size; i++) {
 338                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 339                         n = strlen(names[i][j]);
 340                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 341                                 longest = n;
 342                 }
 343                 if (longest > 0) {
 344                         *str += longest;
 345                         return i;
 346                 }
 347         }
 348
 349         return -1;
 350 }
 351
 352 static enum event_result
 353 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 354 {
 355         const char *s = *str;
 356         int cache_type = -1, cache_op = -1, cache_result = -1;
 357
 358         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 359         /*
 360          * No fallback - if we cannot get a clear cache type
 361          * then bail out:
 362          */
 363         if (cache_type == -1)
 364                 return EVT_FAILED;
 365
 366         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 367                 ++s;
 368
 369                 if (cache_op == -1) {
 370                         cache_op = parse_aliases(&s, hw_cache_op,
 371                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 372                         if (cache_op >= 0) {
 373                                 if (!is_cache_op_valid(cache_type, cache_op))
 374                                         return 0;
 375                                 continue;
 376                         }
 377                 }
 378
 379                 if (cache_result == -1) {
 380                         cache_result = parse_aliases(&s, hw_cache_result,
 381                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 382                         if (cache_result >= 0)
 383                                 continue;
 384                 }
 385
 386                 /*
 387                  * Can't parse this as a cache op or result, so back up
 388                  * to the '-'.
 389                  */
 390                 --s;
 391                 break;
 392         }
 393
 394         /*
 395          * Fall back to reads:
 396          */
 397         if (cache_op == -1)
 398                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 399
 400         /*
 401          * Fall back to accesses:
 402          */
 403         if (cache_result == -1)
 404                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 405
 406         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 407         attr->type = PERF_TYPE_HW_CACHE;
 408
 409         *str = s;
 410         return EVT_HANDLED;
 411 }
 412
 413 static enum event_result
 414 parse_single_tracepoint_event(char *sys_name,
 415                               const char *evt_name,
 416                               unsigned int evt_length,
 417                               char *flags,
 418                               struct perf_event_attr *attr,
 419                               const char **strp)
 420 {
 421         char evt_path[MAXPATHLEN];
 422         char id_buf[4];
 423         u64 id;
 424         int fd;
 425
 426         if (flags) {
 427                 if (!strncmp(flags, "record", strlen(flags))) {
 428                         attr->sample_type |= PERF_SAMPLE_RAW;
 429                         attr->sample_type |= PERF_SAMPLE_TIME;
 430                         attr->sample_type |= PERF_SAMPLE_CPU;
 431                 }
 432         }
 433
 434         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 435                  sys_name, evt_name);
 436
 437         fd = open(evt_path, O_RDONLY);
 438         if (fd < 0)
 439                 return EVT_FAILED;
 440
 441         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 442                 close(fd);
 443                 return EVT_FAILED;
 444         }
 445
 446         close(fd);
 447         id = atoll(id_buf);
 448         attr->config = id;
 449         attr->type = PERF_TYPE_TRACEPOINT;
 450         *strp = evt_name + evt_length;
 451
 452         return EVT_HANDLED;
 453 }
 454
 455 /* sys + ':' + event + ':' + flags*/
 456 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 457 static enum event_result
 458 parse_subsystem_tracepoint_event(char *sys_name, char *flags)
 459 {
 460         char evt_path[MAXPATHLEN];
 461         struct dirent *evt_ent;
 462         DIR *evt_dir;
 463
 464         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 465         evt_dir = opendir(evt_path);
 466
 467         if (!evt_dir) {
 468                 perror("Can't open event dir");
 469                 return EVT_FAILED;
 470         }
 471
 472         while ((evt_ent = readdir(evt_dir))) {
 473                 char event_opt[MAX_EVOPT_LEN + 1];
 474                 int len;
 475                 unsigned int rem = MAX_EVOPT_LEN;
 476
 477                 if (!strcmp(evt_ent->d_name, ".")
 478                     || !strcmp(evt_ent->d_name, "..")
 479                     || !strcmp(evt_ent->d_name, "enable")
 480                     || !strcmp(evt_ent->d_name, "filter"))
 481                         continue;
 482
 483                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s", sys_name,
 484                                evt_ent->d_name);
 485                 if (len < 0)
 486                         return EVT_FAILED;
 487
 488                 rem -= len;
 489                 if (flags) {
 490                         if (rem < strlen(flags) + 1)
 491                                 return EVT_FAILED;
 492
 493                         strcat(event_opt, ":");
 494                         strcat(event_opt, flags);
 495                 }
 496
 497                 if (parse_events(NULL, event_opt, 0))
 498                         return EVT_FAILED;
 499         }
 500
 501         return EVT_HANDLED_ALL;
 502 }
 503
 504
 505 static enum event_result parse_tracepoint_event(const char **strp,
 506                                     struct perf_event_attr *attr)
 507 {
 508         const char *evt_name;
 509         char *flags;
 510         char sys_name[MAX_EVENT_LENGTH];
 511         unsigned int sys_length, evt_length;
 512
 513         if (valid_debugfs_mount(debugfs_path))
 514                 return 0;
 515
 516         evt_name = strchr(*strp, ':');
 517         if (!evt_name)
 518                 return EVT_FAILED;
 519
 520         sys_length = evt_name - *strp;
 521         if (sys_length >= MAX_EVENT_LENGTH)
 522                 return 0;
 523
 524         strncpy(sys_name, *strp, sys_length);
 525         sys_name[sys_length] = '\0';
 526         evt_name = evt_name + 1;
 527
 528         flags = strchr(evt_name, ':');
 529         if (flags) {
 530                 /* split it out: */
 531                 evt_name = strndup(evt_name, flags - evt_name);
 532                 flags++;
 533         }
 534
 535         evt_length = strlen(evt_name);
 536         if (evt_length >= MAX_EVENT_LENGTH)
 537                 return EVT_FAILED;
 538
 539         if (!strcmp(evt_name, "*")) {
 540                 *strp = evt_name + evt_length;
 541                 return parse_subsystem_tracepoint_event(sys_name, flags);
 542         } else
 543                 return parse_single_tracepoint_event(sys_name, evt_name,
 544                                                      evt_length, flags,
 545                                                      attr, strp);
 546 }
 547
 548 static int check_events(const char *str, unsigned int i)
 549 {
 550         int n;
 551
 552         n = strlen(event_symbols[i].symbol);
 553         if (!strncmp(str, event_symbols[i].symbol, n))
 554                 return n;
 555
 556         n = strlen(event_symbols[i].alias);
 557         if (n)
 558                 if (!strncmp(str, event_symbols[i].alias, n))
 559                         return n;
 560         return 0;
 561 }
 562
 563 static enum event_result
 564 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 565 {
 566         const char *str = *strp;
 567         unsigned int i;
 568         int n;
 569
 570         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 571                 n = check_events(str, i);
 572                 if (n > 0) {
 573                         attr->type = event_symbols[i].type;
 574                         attr->config = event_symbols[i].config;
 575                         *strp = str + n;
 576                         return EVT_HANDLED;
 577                 }
 578         }
 579         return EVT_FAILED;
 580 }
 581
 582 static enum event_result
 583 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 584 {
 585         const char *str = *strp;
 586         u64 config;
 587         int n;
 588
 589         if (*str != 'r')
 590                 return EVT_FAILED;
 591         n = hex2u64(str + 1, &config);
 592         if (n > 0) {
 593                 *strp = str + n + 1;
 594                 attr->type = PERF_TYPE_RAW;
 595                 attr->config = config;
 596                 return EVT_HANDLED;
 597         }
 598         return EVT_FAILED;
 599 }
 600
 601 static enum event_result
 602 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 603 {
 604         const char *str = *strp;
 605         char *endp;
 606         unsigned long type;
 607         u64 config;
 608
 609         type = strtoul(str, &endp, 0);
 610         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 611                 str = endp + 1;
 612                 config = strtoul(str, &endp, 0);
 613                 if (endp > str) {
 614                         attr->type = type;
 615                         attr->config = config;
 616                         *strp = endp;
 617                         return EVT_HANDLED;
 618                 }
 619         }
 620         return EVT_FAILED;
 621 }
 622
 623 static enum event_result
 624 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 625 {
 626         const char *str = *strp;
 627         int eu = 1, ek = 1, eh = 1;
 628
 629         if (*str++ != ':')
 630                 return 0;
 631         while (*str) {
 632                 if (*str == 'u')
 633                         eu = 0;
 634                 else if (*str == 'k')
 635                         ek = 0;
 636                 else if (*str == 'h')
 637                         eh = 0;
 638                 else
 639                         break;
 640                 ++str;
 641         }
 642         if (str >= *strp + 2) {
 643                 *strp = str;
 644                 attr->exclude_user   = eu;
 645                 attr->exclude_kernel = ek;
 646                 attr->exclude_hv     = eh;
 647                 return 1;
 648         }
 649         return 0;
 650 }
 651
 652 /*
 653  * Each event can have multiple symbolic names.
 654  * Symbolic names are (almost) exactly matched.
 655  */
 656 static enum event_result
 657 parse_event_symbols(const char **str, struct perf_event_attr *attr)
 658 {
 659         enum event_result ret;
 660
 661         ret = parse_tracepoint_event(str, attr);
 662         if (ret != EVT_FAILED)
 663                 goto modifier;
 664
 665         ret = parse_raw_event(str, attr);
 666         if (ret != EVT_FAILED)
 667                 goto modifier;
 668
 669         ret = parse_numeric_event(str, attr);
 670         if (ret != EVT_FAILED)
 671                 goto modifier;
 672
 673         ret = parse_symbolic_event(str, attr);
 674         if (ret != EVT_FAILED)
 675                 goto modifier;
 676
 677         ret = parse_generic_hw_event(str, attr);
 678         if (ret != EVT_FAILED)
 679                 goto modifier;
 680
 681         return EVT_FAILED;
 682
 683 modifier:
 684         parse_event_modifier(str, attr);
 685
 686         return ret;
 687 }
 688
 689 static void store_event_type(const char *orgname)
 690 {
 691         char filename[PATH_MAX], *c;
 692         FILE *file;
 693         int id;
 694
 695         sprintf(filename, "%s/", debugfs_path);
 696         strncat(filename, orgname, strlen(orgname));
 697         strcat(filename, "/id");
 698
 699         c = strchr(filename, ':');
 700         if (c)
 701                 *c = '/';
 702
 703         file = fopen(filename, "r");
 704         if (!file)
 705                 return;
 706         if (fscanf(file, "%i", &id) < 1)
 707                 die("cannot store event ID");
 708         fclose(file);
 709         perf_header__push_event(id, orgname);
 710 }
 711
 712 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 713 {
 714         struct perf_event_attr attr;
 715         enum event_result ret;
 716
 717         if (strchr(str, ':'))
 718                 store_event_type(str);
 719
 720         for (;;) {
 721                 if (nr_counters == MAX_COUNTERS)
 722                         return -1;
 723
 724                 memset(&attr, 0, sizeof(attr));
 725                 ret = parse_event_symbols(&str, &attr);
 726                 if (ret == EVT_FAILED)
 727                         return -1;
 728
 729                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 730                         return -1;
 731
 732                 if (ret != EVT_HANDLED_ALL) {
 733                         attrs[nr_counters] = attr;
 734                         nr_counters++;
 735                 }
 736
 737                 if (*str == 0)
 738                         break;
 739                 if (*str == ',')
 740                         ++str;
 741                 while (isspace(*str))
 742                         ++str;
 743         }
 744
 745         return 0;
 746 }
 747
 748 int parse_filter(const struct option *opt __used, const char *str,
 749                  int unset __used)
 750 {
 751         int i = nr_counters - 1;
 752         int len = strlen(str);
 753
 754         if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
 755                 fprintf(stderr,
 756                         "-F option should follow a -e tracepoint option\n");
 757                 return -1;
 758         }
 759
 760         filters[i] = malloc(len + 1);
 761         if (!filters[i]) {
 762                 fprintf(stderr, "not enough memory to hold filter string\n");
 763                 return -1;
 764         }
 765         strcpy(filters[i], str);
 766
 767         return 0;
 768 }
 769
 770 static const char * const event_type_descriptors[] = {
 771         "",
 772         "Hardware event",
 773         "Software event",
 774         "Tracepoint event",
 775         "Hardware cache event",
 776 };
 777
 778 /*
 779  * Print the events from <debugfs_mount_point>/tracing/events
 780  */
 781
 782 static void print_tracepoint_events(void)
 783 {
 784         DIR *sys_dir, *evt_dir;
 785         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 786         char evt_path[MAXPATHLEN];
 787         char dir_path[MAXPATHLEN];
 788
 789         if (valid_debugfs_mount(debugfs_path))
 790                 return;
 791
 792         sys_dir = opendir(debugfs_path);
 793         if (!sys_dir)
 794                 return;
 795
 796         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 797
 798                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 799                          sys_dirent.d_name);
 800                 evt_dir = opendir(dir_path);
 801                 if (!evt_dir)
 802                         continue;
 803
 804                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 805                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 806                                  sys_dirent.d_name, evt_dirent.d_name);
 807                         fprintf(stderr, "  %-42s [%s]\n", evt_path,
 808                                 event_type_descriptors[PERF_TYPE_TRACEPOINT+1]);
 809                 }
 810                 closedir(evt_dir);
 811         }
 812         closedir(sys_dir);
 813 }
 814
 815 /*
 816  * Print the help text for the event symbols:
 817  */
 818 void print_events(void)
 819 {
 820         struct event_symbol *syms = event_symbols;
 821         unsigned int i, type, op, prev_type = -1;
 822         char name[40];
 823
 824         fprintf(stderr, "\n");
 825         fprintf(stderr, "List of pre-defined events (to be used in -e):\n");
 826
 827         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 828                 type = syms->type + 1;
 829                 if (type >= ARRAY_SIZE(event_type_descriptors))
 830                         type = 0;
 831
 832                 if (type != prev_type)
 833                         fprintf(stderr, "\n");
 834
 835                 if (strlen(syms->alias))
 836                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
 837                 else
 838                         strcpy(name, syms->symbol);
 839                 fprintf(stderr, "  %-42s [%s]\n", name,
 840                         event_type_descriptors[type]);
 841
 842                 prev_type = type;
 843         }
 844
 845         fprintf(stderr, "\n");
 846         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 847                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 848                         /* skip invalid cache type */
 849                         if (!is_cache_op_valid(type, op))
 850                                 continue;
 851
 852                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 853                                 fprintf(stderr, "  %-42s [%s]\n",
 854                                         event_cache_name(type, op, i),
 855                                         event_type_descriptors[4]);
 856                         }
 857                 }
 858         }
 859
 860         fprintf(stderr, "\n");
 861         fprintf(stderr, "  %-42s [raw hardware event descriptor]\n",
 862                 "rNNN");
 863         fprintf(stderr, "\n");
 864
 865         print_tracepoint_events();
 866
 867         exit(129);
 868 }