tools/perf/util/parse-events.c

   1 #include "../../../include/linux/hw_breakpoint.h"
   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   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
  52   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
  53 };
  54
  55 #define __PERF_EVENT_FIELD(config, name) \
  56         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  57
  58 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
  59 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
  60 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
  61 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
  62
  63 static const char *hw_event_names[] = {
  64         "cycles",
  65         "instructions",
  66         "cache-references",
  67         "cache-misses",
  68         "branches",
  69         "branch-misses",
  70         "bus-cycles",
  71 };
  72
  73 static const char *sw_event_names[] = {
  74         "cpu-clock-msecs",
  75         "task-clock-msecs",
  76         "page-faults",
  77         "context-switches",
  78         "CPU-migrations",
  79         "minor-faults",
  80         "major-faults",
  81         "alignment-faults",
  82         "emulation-faults",
  83 };
  84
  85 #define MAX_ALIASES 8
  86
  87 static const char *hw_cache[][MAX_ALIASES] = {
  88  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  89  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  90  { "LLC",       "L2"                                                    },
  91  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  92  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  93  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  94 };
  95
  96 static const char *hw_cache_op[][MAX_ALIASES] = {
  97  { "load",      "loads",        "read",                                 },
  98  { "store",     "stores",       "write",                                },
  99  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
 100 };
 101
 102 static const char *hw_cache_result[][MAX_ALIASES] = {
 103  { "refs",      "Reference",    "ops",          "access",               },
 104  { "misses",    "miss",                                                 },
 105 };
 106
 107 #define C(x)            PERF_COUNT_HW_CACHE_##x
 108 #define CACHE_READ      (1 << C(OP_READ))
 109 #define CACHE_WRITE     (1 << C(OP_WRITE))
 110 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 111 #define COP(x)          (1 << x)
 112
 113 /*
 114  * cache operartion stat
 115  * L1I : Read and prefetch only
 116  * ITLB and BPU : Read-only
 117  */
 118 static unsigned long hw_cache_stat[C(MAX)] = {
 119  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 120  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 121  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 122  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 123  [C(ITLB)]      = (CACHE_READ),
 124  [C(BPU)]       = (CACHE_READ),
 125 };
 126
 127 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 128         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 129         if (sys_dirent.d_type == DT_DIR &&                                     \
 130            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 131            (strcmp(sys_dirent.d_name, "..")))
 132
 133 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 134 {
 135         char evt_path[MAXPATHLEN];
 136         int fd;
 137
 138         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 139                         sys_dir->d_name, evt_dir->d_name);
 140         fd = open(evt_path, O_RDONLY);
 141         if (fd < 0)
 142                 return -EINVAL;
 143         close(fd);
 144
 145         return 0;
 146 }
 147
 148 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 149         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 150         if (evt_dirent.d_type == DT_DIR &&                                     \
 151            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 152            (strcmp(evt_dirent.d_name, "..")) &&                                \
 153            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 154
 155 #define MAX_EVENT_LENGTH 512
 156
 157
 158 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 159 {
 160         struct tracepoint_path *path = NULL;
 161         DIR *sys_dir, *evt_dir;
 162         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 163         char id_buf[4];
 164         int fd;
 165         u64 id;
 166         char evt_path[MAXPATHLEN];
 167         char dir_path[MAXPATHLEN];
 168
 169         if (debugfs_valid_mountpoint(debugfs_path))
 170                 return NULL;
 171
 172         sys_dir = opendir(debugfs_path);
 173         if (!sys_dir)
 174                 return NULL;
 175
 176         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 177
 178                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 179                          sys_dirent.d_name);
 180                 evt_dir = opendir(dir_path);
 181                 if (!evt_dir)
 182                         continue;
 183
 184                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 185
 186                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 187                                  evt_dirent.d_name);
 188                         fd = open(evt_path, O_RDONLY);
 189                         if (fd < 0)
 190                                 continue;
 191                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 192                                 close(fd);
 193                                 continue;
 194                         }
 195                         close(fd);
 196                         id = atoll(id_buf);
 197                         if (id == config) {
 198                                 closedir(evt_dir);
 199                                 closedir(sys_dir);
 200                                 path = zalloc(sizeof(path));
 201                                 path->system = malloc(MAX_EVENT_LENGTH);
 202                                 if (!path->system) {
 203                                         free(path);
 204                                         return NULL;
 205                                 }
 206                                 path->name = malloc(MAX_EVENT_LENGTH);
 207                                 if (!path->name) {
 208                                         free(path->system);
 209                                         free(path);
 210                                         return NULL;
 211                                 }
 212                                 strncpy(path->system, sys_dirent.d_name,
 213                                         MAX_EVENT_LENGTH);
 214                                 strncpy(path->name, evt_dirent.d_name,
 215                                         MAX_EVENT_LENGTH);
 216                                 return path;
 217                         }
 218                 }
 219                 closedir(evt_dir);
 220         }
 221
 222         closedir(sys_dir);
 223         return NULL;
 224 }
 225
 226 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 227 static const char *tracepoint_id_to_name(u64 config)
 228 {
 229         static char buf[TP_PATH_LEN];
 230         struct tracepoint_path *path;
 231
 232         path = tracepoint_id_to_path(config);
 233         if (path) {
 234                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 235                 free(path->name);
 236                 free(path->system);
 237                 free(path);
 238         } else
 239                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 240
 241         return buf;
 242 }
 243
 244 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 245 {
 246         if (hw_cache_stat[cache_type] & COP(cache_op))
 247                 return 1;       /* valid */
 248         else
 249                 return 0;       /* invalid */
 250 }
 251
 252 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 253 {
 254         static char name[50];
 255
 256         if (cache_result) {
 257                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 258                         hw_cache_op[cache_op][0],
 259                         hw_cache_result[cache_result][0]);
 260         } else {
 261                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 262                         hw_cache_op[cache_op][1]);
 263         }
 264
 265         return name;
 266 }
 267
 268 const char *event_name(int counter)
 269 {
 270         u64 config = attrs[counter].config;
 271         int type = attrs[counter].type;
 272
 273         return __event_name(type, config);
 274 }
 275
 276 const char *__event_name(int type, u64 config)
 277 {
 278         static char buf[32];
 279
 280         if (type == PERF_TYPE_RAW) {
 281                 sprintf(buf, "raw 0x%llx", config);
 282                 return buf;
 283         }
 284
 285         switch (type) {
 286         case PERF_TYPE_HARDWARE:
 287                 if (config < PERF_COUNT_HW_MAX)
 288                         return hw_event_names[config];
 289                 return "unknown-hardware";
 290
 291         case PERF_TYPE_HW_CACHE: {
 292                 u8 cache_type, cache_op, cache_result;
 293
 294                 cache_type   = (config >>  0) & 0xff;
 295                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 296                         return "unknown-ext-hardware-cache-type";
 297
 298                 cache_op     = (config >>  8) & 0xff;
 299                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 300                         return "unknown-ext-hardware-cache-op";
 301
 302                 cache_result = (config >> 16) & 0xff;
 303                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 304                         return "unknown-ext-hardware-cache-result";
 305
 306                 if (!is_cache_op_valid(cache_type, cache_op))
 307                         return "invalid-cache";
 308
 309                 return event_cache_name(cache_type, cache_op, cache_result);
 310         }
 311
 312         case PERF_TYPE_SOFTWARE:
 313                 if (config < PERF_COUNT_SW_MAX)
 314                         return sw_event_names[config];
 315                 return "unknown-software";
 316
 317         case PERF_TYPE_TRACEPOINT:
 318                 return tracepoint_id_to_name(config);
 319
 320         default:
 321                 break;
 322         }
 323
 324         return "unknown";
 325 }
 326
 327 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 328 {
 329         int i, j;
 330         int n, longest = -1;
 331
 332         for (i = 0; i < size; i++) {
 333                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 334                         n = strlen(names[i][j]);
 335                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 336                                 longest = n;
 337                 }
 338                 if (longest > 0) {
 339                         *str += longest;
 340                         return i;
 341                 }
 342         }
 343
 344         return -1;
 345 }
 346
 347 static enum event_result
 348 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 349 {
 350         const char *s = *str;
 351         int cache_type = -1, cache_op = -1, cache_result = -1;
 352
 353         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 354         /*
 355          * No fallback - if we cannot get a clear cache type
 356          * then bail out:
 357          */
 358         if (cache_type == -1)
 359                 return EVT_FAILED;
 360
 361         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 362                 ++s;
 363
 364                 if (cache_op == -1) {
 365                         cache_op = parse_aliases(&s, hw_cache_op,
 366                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 367                         if (cache_op >= 0) {
 368                                 if (!is_cache_op_valid(cache_type, cache_op))
 369                                         return 0;
 370                                 continue;
 371                         }
 372                 }
 373
 374                 if (cache_result == -1) {
 375                         cache_result = parse_aliases(&s, hw_cache_result,
 376                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 377                         if (cache_result >= 0)
 378                                 continue;
 379                 }
 380
 381                 /*
 382                  * Can't parse this as a cache op or result, so back up
 383                  * to the '-'.
 384                  */
 385                 --s;
 386                 break;
 387         }
 388
 389         /*
 390          * Fall back to reads:
 391          */
 392         if (cache_op == -1)
 393                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 394
 395         /*
 396          * Fall back to accesses:
 397          */
 398         if (cache_result == -1)
 399                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 400
 401         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 402         attr->type = PERF_TYPE_HW_CACHE;
 403
 404         *str = s;
 405         return EVT_HANDLED;
 406 }
 407
 408 static enum event_result
 409 parse_single_tracepoint_event(char *sys_name,
 410                               const char *evt_name,
 411                               unsigned int evt_length,
 412                               char *flags,
 413                               struct perf_event_attr *attr,
 414                               const char **strp)
 415 {
 416         char evt_path[MAXPATHLEN];
 417         char id_buf[4];
 418         u64 id;
 419         int fd;
 420
 421         if (flags) {
 422                 if (!strncmp(flags, "record", strlen(flags))) {
 423                         attr->sample_type |= PERF_SAMPLE_RAW;
 424                         attr->sample_type |= PERF_SAMPLE_TIME;
 425                         attr->sample_type |= PERF_SAMPLE_CPU;
 426                 }
 427         }
 428
 429         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 430                  sys_name, evt_name);
 431
 432         fd = open(evt_path, O_RDONLY);
 433         if (fd < 0)
 434                 return EVT_FAILED;
 435
 436         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 437                 close(fd);
 438                 return EVT_FAILED;
 439         }
 440
 441         close(fd);
 442         id = atoll(id_buf);
 443         attr->config = id;
 444         attr->type = PERF_TYPE_TRACEPOINT;
 445         *strp = evt_name + evt_length;
 446
 447         return EVT_HANDLED;
 448 }
 449
 450 /* sys + ':' + event + ':' + flags*/
 451 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 452 static enum event_result
 453 parse_subsystem_tracepoint_event(char *sys_name, char *flags)
 454 {
 455         char evt_path[MAXPATHLEN];
 456         struct dirent *evt_ent;
 457         DIR *evt_dir;
 458
 459         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 460         evt_dir = opendir(evt_path);
 461
 462         if (!evt_dir) {
 463                 perror("Can't open event dir");
 464                 return EVT_FAILED;
 465         }
 466
 467         while ((evt_ent = readdir(evt_dir))) {
 468                 char event_opt[MAX_EVOPT_LEN + 1];
 469                 int len;
 470                 unsigned int rem = MAX_EVOPT_LEN;
 471
 472                 if (!strcmp(evt_ent->d_name, ".")
 473                     || !strcmp(evt_ent->d_name, "..")
 474                     || !strcmp(evt_ent->d_name, "enable")
 475                     || !strcmp(evt_ent->d_name, "filter"))
 476                         continue;
 477
 478                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s", sys_name,
 479                                evt_ent->d_name);
 480                 if (len < 0)
 481                         return EVT_FAILED;
 482
 483                 rem -= len;
 484                 if (flags) {
 485                         if (rem < strlen(flags) + 1)
 486                                 return EVT_FAILED;
 487
 488                         strcat(event_opt, ":");
 489                         strcat(event_opt, flags);
 490                 }
 491
 492                 if (parse_events(NULL, event_opt, 0))
 493                         return EVT_FAILED;
 494         }
 495
 496         return EVT_HANDLED_ALL;
 497 }
 498
 499
 500 static enum event_result parse_tracepoint_event(const char **strp,
 501                                     struct perf_event_attr *attr)
 502 {
 503         const char *evt_name;
 504         char *flags;
 505         char sys_name[MAX_EVENT_LENGTH];
 506         unsigned int sys_length, evt_length;
 507
 508         if (debugfs_valid_mountpoint(debugfs_path))
 509                 return 0;
 510
 511         evt_name = strchr(*strp, ':');
 512         if (!evt_name)
 513                 return EVT_FAILED;
 514
 515         sys_length = evt_name - *strp;
 516         if (sys_length >= MAX_EVENT_LENGTH)
 517                 return 0;
 518
 519         strncpy(sys_name, *strp, sys_length);
 520         sys_name[sys_length] = '\0';
 521         evt_name = evt_name + 1;
 522
 523         flags = strchr(evt_name, ':');
 524         if (flags) {
 525                 /* split it out: */
 526                 evt_name = strndup(evt_name, flags - evt_name);
 527                 flags++;
 528         }
 529
 530         evt_length = strlen(evt_name);
 531         if (evt_length >= MAX_EVENT_LENGTH)
 532                 return EVT_FAILED;
 533
 534         if (!strcmp(evt_name, "*")) {
 535                 *strp = evt_name + evt_length;
 536                 return parse_subsystem_tracepoint_event(sys_name, flags);
 537         } else
 538                 return parse_single_tracepoint_event(sys_name, evt_name,
 539                                                      evt_length, flags,
 540                                                      attr, strp);
 541 }
 542
 543 static enum event_result
 544 parse_breakpoint_type(const char *type, const char **strp,
 545                       struct perf_event_attr *attr)
 546 {
 547         int i;
 548
 549         for (i = 0; i < 3; i++) {
 550                 if (!type[i])
 551                         break;
 552
 553                 switch (type[i]) {
 554                 case 'r':
 555                         attr->bp_type |= HW_BREAKPOINT_R;
 556                         break;
 557                 case 'w':
 558                         attr->bp_type |= HW_BREAKPOINT_W;
 559                         break;
 560                 case 'x':
 561                         attr->bp_type |= HW_BREAKPOINT_X;
 562                         break;
 563                 default:
 564                         return EVT_FAILED;
 565                 }
 566         }
 567         if (!attr->bp_type) /* Default */
 568                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 569
 570         *strp = type + i;
 571
 572         return EVT_HANDLED;
 573 }
 574
 575 static enum event_result
 576 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 577 {
 578         const char *target;
 579         const char *type;
 580         char *endaddr;
 581         u64 addr;
 582         enum event_result err;
 583
 584         target = strchr(*strp, ':');
 585         if (!target)
 586                 return EVT_FAILED;
 587
 588         if (strncmp(*strp, "mem", target - *strp) != 0)
 589                 return EVT_FAILED;
 590
 591         target++;
 592
 593         addr = strtoull(target, &endaddr, 0);
 594         if (target == endaddr)
 595                 return EVT_FAILED;
 596
 597         attr->bp_addr = addr;
 598         *strp = endaddr;
 599
 600         type = strchr(target, ':');
 601
 602         /* If no type is defined, just rw as default */
 603         if (!type) {
 604                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 605         } else {
 606                 err = parse_breakpoint_type(++type, strp, attr);
 607                 if (err == EVT_FAILED)
 608                         return EVT_FAILED;
 609         }
 610
 611         /* We should find a nice way to override the access type */
 612         attr->bp_len = HW_BREAKPOINT_LEN_4;
 613         attr->type = PERF_TYPE_BREAKPOINT;
 614
 615         return EVT_HANDLED;
 616 }
 617
 618 static int check_events(const char *str, unsigned int i)
 619 {
 620         int n;
 621
 622         n = strlen(event_symbols[i].symbol);
 623         if (!strncmp(str, event_symbols[i].symbol, n))
 624                 return n;
 625
 626         n = strlen(event_symbols[i].alias);
 627         if (n)
 628                 if (!strncmp(str, event_symbols[i].alias, n))
 629                         return n;
 630         return 0;
 631 }
 632
 633 static enum event_result
 634 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 635 {
 636         const char *str = *strp;
 637         unsigned int i;
 638         int n;
 639
 640         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 641                 n = check_events(str, i);
 642                 if (n > 0) {
 643                         attr->type = event_symbols[i].type;
 644                         attr->config = event_symbols[i].config;
 645                         *strp = str + n;
 646                         return EVT_HANDLED;
 647                 }
 648         }
 649         return EVT_FAILED;
 650 }
 651
 652 static enum event_result
 653 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 654 {
 655         const char *str = *strp;
 656         u64 config;
 657         int n;
 658
 659         if (*str != 'r')
 660                 return EVT_FAILED;
 661         n = hex2u64(str + 1, &config);
 662         if (n > 0) {
 663                 *strp = str + n + 1;
 664                 attr->type = PERF_TYPE_RAW;
 665                 attr->config = config;
 666                 return EVT_HANDLED;
 667         }
 668         return EVT_FAILED;
 669 }
 670
 671 static enum event_result
 672 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 673 {
 674         const char *str = *strp;
 675         char *endp;
 676         unsigned long type;
 677         u64 config;
 678
 679         type = strtoul(str, &endp, 0);
 680         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 681                 str = endp + 1;
 682                 config = strtoul(str, &endp, 0);
 683                 if (endp > str) {
 684                         attr->type = type;
 685                         attr->config = config;
 686                         *strp = endp;
 687                         return EVT_HANDLED;
 688                 }
 689         }
 690         return EVT_FAILED;
 691 }
 692
 693 static enum event_result
 694 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 695 {
 696         const char *str = *strp;
 697         int eu = 1, ek = 1, eh = 1;
 698
 699         if (*str++ != ':')
 700                 return 0;
 701         while (*str) {
 702                 if (*str == 'u')
 703                         eu = 0;
 704                 else if (*str == 'k')
 705                         ek = 0;
 706                 else if (*str == 'h')
 707                         eh = 0;
 708                 else
 709                         break;
 710                 ++str;
 711         }
 712         if (str >= *strp + 2) {
 713                 *strp = str;
 714                 attr->exclude_user   = eu;
 715                 attr->exclude_kernel = ek;
 716                 attr->exclude_hv     = eh;
 717                 return 1;
 718         }
 719         return 0;
 720 }
 721
 722 /*
 723  * Each event can have multiple symbolic names.
 724  * Symbolic names are (almost) exactly matched.
 725  */
 726 static enum event_result
 727 parse_event_symbols(const char **str, struct perf_event_attr *attr)
 728 {
 729         enum event_result ret;
 730
 731         ret = parse_tracepoint_event(str, attr);
 732         if (ret != EVT_FAILED)
 733                 goto modifier;
 734
 735         ret = parse_raw_event(str, attr);
 736         if (ret != EVT_FAILED)
 737                 goto modifier;
 738
 739         ret = parse_numeric_event(str, attr);
 740         if (ret != EVT_FAILED)
 741                 goto modifier;
 742
 743         ret = parse_symbolic_event(str, attr);
 744         if (ret != EVT_FAILED)
 745                 goto modifier;
 746
 747         ret = parse_generic_hw_event(str, attr);
 748         if (ret != EVT_FAILED)
 749                 goto modifier;
 750
 751         ret = parse_breakpoint_event(str, attr);
 752         if (ret != EVT_FAILED)
 753                 goto modifier;
 754
 755         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 756         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 757         return EVT_FAILED;
 758
 759 modifier:
 760         parse_event_modifier(str, attr);
 761
 762         return ret;
 763 }
 764
 765 static void store_event_type(const char *orgname)
 766 {
 767         char filename[PATH_MAX], *c;
 768         FILE *file;
 769         int id;
 770
 771         sprintf(filename, "%s/", debugfs_path);
 772         strncat(filename, orgname, strlen(orgname));
 773         strcat(filename, "/id");
 774
 775         c = strchr(filename, ':');
 776         if (c)
 777                 *c = '/';
 778
 779         file = fopen(filename, "r");
 780         if (!file)
 781                 return;
 782         if (fscanf(file, "%i", &id) < 1)
 783                 die("cannot store event ID");
 784         fclose(file);
 785         perf_header__push_event(id, orgname);
 786 }
 787
 788 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 789 {
 790         struct perf_event_attr attr;
 791         enum event_result ret;
 792
 793         if (strchr(str, ':'))
 794                 store_event_type(str);
 795
 796         for (;;) {
 797                 if (nr_counters == MAX_COUNTERS)
 798                         return -1;
 799
 800                 memset(&attr, 0, sizeof(attr));
 801                 ret = parse_event_symbols(&str, &attr);
 802                 if (ret == EVT_FAILED)
 803                         return -1;
 804
 805                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 806                         return -1;
 807
 808                 if (ret != EVT_HANDLED_ALL) {
 809                         attrs[nr_counters] = attr;
 810                         nr_counters++;
 811                 }
 812
 813                 if (*str == 0)
 814                         break;
 815                 if (*str == ',')
 816                         ++str;
 817                 while (isspace(*str))
 818                         ++str;
 819         }
 820
 821         return 0;
 822 }
 823
 824 int parse_filter(const struct option *opt __used, const char *str,
 825                  int unset __used)
 826 {
 827         int i = nr_counters - 1;
 828         int len = strlen(str);
 829
 830         if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
 831                 fprintf(stderr,
 832                         "-F option should follow a -e tracepoint option\n");
 833                 return -1;
 834         }
 835
 836         filters[i] = malloc(len + 1);
 837         if (!filters[i]) {
 838                 fprintf(stderr, "not enough memory to hold filter string\n");
 839                 return -1;
 840         }
 841         strcpy(filters[i], str);
 842
 843         return 0;
 844 }
 845
 846 static const char * const event_type_descriptors[] = {
 847         "",
 848         "Hardware event",
 849         "Software event",
 850         "Tracepoint event",
 851         "Hardware cache event",
 852 };
 853
 854 /*
 855  * Print the events from <debugfs_mount_point>/tracing/events
 856  */
 857
 858 static void print_tracepoint_events(void)
 859 {
 860         DIR *sys_dir, *evt_dir;
 861         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 862         char evt_path[MAXPATHLEN];
 863         char dir_path[MAXPATHLEN];
 864
 865         if (debugfs_valid_mountpoint(debugfs_path))
 866                 return;
 867
 868         sys_dir = opendir(debugfs_path);
 869         if (!sys_dir)
 870                 return;
 871
 872         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 873
 874                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 875                          sys_dirent.d_name);
 876                 evt_dir = opendir(dir_path);
 877                 if (!evt_dir)
 878                         continue;
 879
 880                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 881                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 882                                  sys_dirent.d_name, evt_dirent.d_name);
 883                         printf("  %-42s [%s]\n", evt_path,
 884                                 event_type_descriptors[PERF_TYPE_TRACEPOINT+1]);
 885                 }
 886                 closedir(evt_dir);
 887         }
 888         closedir(sys_dir);
 889 }
 890
 891 /*
 892  * Print the help text for the event symbols:
 893  */
 894 void print_events(void)
 895 {
 896         struct event_symbol *syms = event_symbols;
 897         unsigned int i, type, op, prev_type = -1;
 898         char name[40];
 899
 900         printf("\n");
 901         printf("List of pre-defined events (to be used in -e):\n");
 902
 903         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 904                 type = syms->type + 1;
 905                 if (type >= ARRAY_SIZE(event_type_descriptors))
 906                         type = 0;
 907
 908                 if (type != prev_type)
 909                         printf("\n");
 910
 911                 if (strlen(syms->alias))
 912                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
 913                 else
 914                         strcpy(name, syms->symbol);
 915                 printf("  %-42s [%s]\n", name,
 916                         event_type_descriptors[type]);
 917
 918                 prev_type = type;
 919         }
 920
 921         printf("\n");
 922         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 923                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 924                         /* skip invalid cache type */
 925                         if (!is_cache_op_valid(type, op))
 926                                 continue;
 927
 928                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 929                                 printf("  %-42s [%s]\n",
 930                                         event_cache_name(type, op, i),
 931                                         event_type_descriptors[4]);
 932                         }
 933                 }
 934         }
 935
 936         printf("\n");
 937         printf("  %-42s [raw hardware event descriptor]\n",
 938                 "rNNN");
 939         printf("\n");
 940
 941         printf("  %-42s [hardware breakpoint]\n", "mem:<addr>[:access]");
 942         printf("\n");
 943
 944         print_tracepoint_events();
 945
 946         exit(129);
 947 }