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