tools/perf/util/parse-events.c

   1 #include "../../../include/linux/hw_breakpoint.h"
   2 #include "util.h"
   3 #include "../perf.h"
   4 #include "evlist.h"
   5 #include "evsel.h"
   6 #include "parse-options.h"
   7 #include "parse-events.h"
   8 #include "exec_cmd.h"
   9 #include "string.h"
  10 #include "symbol.h"
  11 #include "cache.h"
  12 #include "header.h"
  13 #include "debugfs.h"
  14
  15 struct event_symbol {
  16         u8              type;
  17         u64             config;
  18         const char      *symbol;
  19         const char      *alias;
  20 };
  21
  22 enum event_result {
  23         EVT_FAILED,
  24         EVT_HANDLED,
  25         EVT_HANDLED_ALL
  26 };
  27
  28 char debugfs_path[MAXPATHLEN];
  29
  30 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
  31 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
  32
  33 static struct event_symbol event_symbols[] = {
  34   { CHW(CPU_CYCLES),            "cpu-cycles",           "cycles"        },
  35   { CHW(INSTRUCTIONS),          "instructions",         ""              },
  36   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
  37   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
  38   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
  39   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
  40   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
  41
  42   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
  43   { CSW(TASK_CLOCK),            "task-clock",           ""              },
  44   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
  45   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
  46   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
  47   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
  48   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
  49   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
  50   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
  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         "alignment-faults",
  80         "emulation-faults",
  81 };
  82
  83 #define MAX_ALIASES 8
  84
  85 static const char *hw_cache[][MAX_ALIASES] = {
  86  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  87  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  88  { "LLC",       "L2"                                                    },
  89  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  90  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  91  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  92 };
  93
  94 static const char *hw_cache_op[][MAX_ALIASES] = {
  95  { "load",      "loads",        "read",                                 },
  96  { "store",     "stores",       "write",                                },
  97  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
  98 };
  99
 100 static const char *hw_cache_result[][MAX_ALIASES] = {
 101  { "refs",      "Reference",    "ops",          "access",               },
 102  { "misses",    "miss",                                                 },
 103 };
 104
 105 #define C(x)            PERF_COUNT_HW_CACHE_##x
 106 #define CACHE_READ      (1 << C(OP_READ))
 107 #define CACHE_WRITE     (1 << C(OP_WRITE))
 108 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 109 #define COP(x)          (1 << x)
 110
 111 /*
 112  * cache operartion stat
 113  * L1I : Read and prefetch only
 114  * ITLB and BPU : Read-only
 115  */
 116 static unsigned long hw_cache_stat[C(MAX)] = {
 117  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 118  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 119  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 120  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 121  [C(ITLB)]      = (CACHE_READ),
 122  [C(BPU)]       = (CACHE_READ),
 123 };
 124
 125 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 126         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 127         if (sys_dirent.d_type == DT_DIR &&                                     \
 128            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 129            (strcmp(sys_dirent.d_name, "..")))
 130
 131 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 132 {
 133         char evt_path[MAXPATHLEN];
 134         int fd;
 135
 136         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 137                         sys_dir->d_name, evt_dir->d_name);
 138         fd = open(evt_path, O_RDONLY);
 139         if (fd < 0)
 140                 return -EINVAL;
 141         close(fd);
 142
 143         return 0;
 144 }
 145
 146 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 147         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 148         if (evt_dirent.d_type == DT_DIR &&                                     \
 149            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 150            (strcmp(evt_dirent.d_name, "..")) &&                                \
 151            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 152
 153 #define MAX_EVENT_LENGTH 512
 154
 155
 156 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 157 {
 158         struct tracepoint_path *path = NULL;
 159         DIR *sys_dir, *evt_dir;
 160         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 161         char id_buf[4];
 162         int fd;
 163         u64 id;
 164         char evt_path[MAXPATHLEN];
 165         char dir_path[MAXPATHLEN];
 166
 167         if (debugfs_valid_mountpoint(debugfs_path))
 168                 return NULL;
 169
 170         sys_dir = opendir(debugfs_path);
 171         if (!sys_dir)
 172                 return NULL;
 173
 174         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 175
 176                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 177                          sys_dirent.d_name);
 178                 evt_dir = opendir(dir_path);
 179                 if (!evt_dir)
 180                         continue;
 181
 182                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 183
 184                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 185                                  evt_dirent.d_name);
 186                         fd = open(evt_path, O_RDONLY);
 187                         if (fd < 0)
 188                                 continue;
 189                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 190                                 close(fd);
 191                                 continue;
 192                         }
 193                         close(fd);
 194                         id = atoll(id_buf);
 195                         if (id == config) {
 196                                 closedir(evt_dir);
 197                                 closedir(sys_dir);
 198                                 path = zalloc(sizeof(*path));
 199                                 path->system = malloc(MAX_EVENT_LENGTH);
 200                                 if (!path->system) {
 201                                         free(path);
 202                                         return NULL;
 203                                 }
 204                                 path->name = malloc(MAX_EVENT_LENGTH);
 205                                 if (!path->name) {
 206                                         free(path->system);
 207                                         free(path);
 208                                         return NULL;
 209                                 }
 210                                 strncpy(path->system, sys_dirent.d_name,
 211                                         MAX_EVENT_LENGTH);
 212                                 strncpy(path->name, evt_dirent.d_name,
 213                                         MAX_EVENT_LENGTH);
 214                                 return path;
 215                         }
 216                 }
 217                 closedir(evt_dir);
 218         }
 219
 220         closedir(sys_dir);
 221         return NULL;
 222 }
 223
 224 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 225 static const char *tracepoint_id_to_name(u64 config)
 226 {
 227         static char buf[TP_PATH_LEN];
 228         struct tracepoint_path *path;
 229
 230         path = tracepoint_id_to_path(config);
 231         if (path) {
 232                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 233                 free(path->name);
 234                 free(path->system);
 235                 free(path);
 236         } else
 237                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 238
 239         return buf;
 240 }
 241
 242 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 243 {
 244         if (hw_cache_stat[cache_type] & COP(cache_op))
 245                 return 1;       /* valid */
 246         else
 247                 return 0;       /* invalid */
 248 }
 249
 250 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 251 {
 252         static char name[50];
 253
 254         if (cache_result) {
 255                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 256                         hw_cache_op[cache_op][0],
 257                         hw_cache_result[cache_result][0]);
 258         } else {
 259                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 260                         hw_cache_op[cache_op][1]);
 261         }
 262
 263         return name;
 264 }
 265
 266 const char *event_type(int type)
 267 {
 268         switch (type) {
 269         case PERF_TYPE_HARDWARE:
 270                 return "hardware";
 271
 272         case PERF_TYPE_SOFTWARE:
 273                 return "software";
 274
 275         case PERF_TYPE_TRACEPOINT:
 276                 return "tracepoint";
 277
 278         case PERF_TYPE_HW_CACHE:
 279                 return "hardware-cache";
 280
 281         default:
 282                 break;
 283         }
 284
 285         return "unknown";
 286 }
 287
 288 const char *event_name(struct perf_evsel *evsel)
 289 {
 290         u64 config = evsel->attr.config;
 291         int type = evsel->attr.type;
 292
 293         if (evsel->name)
 294                 return evsel->name;
 295
 296         return __event_name(type, config);
 297 }
 298
 299 const char *__event_name(int type, u64 config)
 300 {
 301         static char buf[32];
 302
 303         if (type == PERF_TYPE_RAW) {
 304                 sprintf(buf, "raw 0x%" PRIx64, config);
 305                 return buf;
 306         }
 307
 308         switch (type) {
 309         case PERF_TYPE_HARDWARE:
 310                 if (config < PERF_COUNT_HW_MAX)
 311                         return hw_event_names[config];
 312                 return "unknown-hardware";
 313
 314         case PERF_TYPE_HW_CACHE: {
 315                 u8 cache_type, cache_op, cache_result;
 316
 317                 cache_type   = (config >>  0) & 0xff;
 318                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 319                         return "unknown-ext-hardware-cache-type";
 320
 321                 cache_op     = (config >>  8) & 0xff;
 322                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 323                         return "unknown-ext-hardware-cache-op";
 324
 325                 cache_result = (config >> 16) & 0xff;
 326                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 327                         return "unknown-ext-hardware-cache-result";
 328
 329                 if (!is_cache_op_valid(cache_type, cache_op))
 330                         return "invalid-cache";
 331
 332                 return event_cache_name(cache_type, cache_op, cache_result);
 333         }
 334
 335         case PERF_TYPE_SOFTWARE:
 336                 if (config < PERF_COUNT_SW_MAX)
 337                         return sw_event_names[config];
 338                 return "unknown-software";
 339
 340         case PERF_TYPE_TRACEPOINT:
 341                 return tracepoint_id_to_name(config);
 342
 343         default:
 344                 break;
 345         }
 346
 347         return "unknown";
 348 }
 349
 350 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 351 {
 352         int i, j;
 353         int n, longest = -1;
 354
 355         for (i = 0; i < size; i++) {
 356                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 357                         n = strlen(names[i][j]);
 358                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 359                                 longest = n;
 360                 }
 361                 if (longest > 0) {
 362                         *str += longest;
 363                         return i;
 364                 }
 365         }
 366
 367         return -1;
 368 }
 369
 370 static enum event_result
 371 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 372 {
 373         const char *s = *str;
 374         int cache_type = -1, cache_op = -1, cache_result = -1;
 375
 376         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 377         /*
 378          * No fallback - if we cannot get a clear cache type
 379          * then bail out:
 380          */
 381         if (cache_type == -1)
 382                 return EVT_FAILED;
 383
 384         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 385                 ++s;
 386
 387                 if (cache_op == -1) {
 388                         cache_op = parse_aliases(&s, hw_cache_op,
 389                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 390                         if (cache_op >= 0) {
 391                                 if (!is_cache_op_valid(cache_type, cache_op))
 392                                         return 0;
 393                                 continue;
 394                         }
 395                 }
 396
 397                 if (cache_result == -1) {
 398                         cache_result = parse_aliases(&s, hw_cache_result,
 399                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 400                         if (cache_result >= 0)
 401                                 continue;
 402                 }
 403
 404                 /*
 405                  * Can't parse this as a cache op or result, so back up
 406                  * to the '-'.
 407                  */
 408                 --s;
 409                 break;
 410         }
 411
 412         /*
 413          * Fall back to reads:
 414          */
 415         if (cache_op == -1)
 416                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 417
 418         /*
 419          * Fall back to accesses:
 420          */
 421         if (cache_result == -1)
 422                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 423
 424         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 425         attr->type = PERF_TYPE_HW_CACHE;
 426
 427         *str = s;
 428         return EVT_HANDLED;
 429 }
 430
 431 static enum event_result
 432 parse_single_tracepoint_event(char *sys_name,
 433                               const char *evt_name,
 434                               unsigned int evt_length,
 435                               struct perf_event_attr *attr,
 436                               const char **strp)
 437 {
 438         char evt_path[MAXPATHLEN];
 439         char id_buf[4];
 440         u64 id;
 441         int fd;
 442
 443         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 444                  sys_name, evt_name);
 445
 446         fd = open(evt_path, O_RDONLY);
 447         if (fd < 0)
 448                 return EVT_FAILED;
 449
 450         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 451                 close(fd);
 452                 return EVT_FAILED;
 453         }
 454
 455         close(fd);
 456         id = atoll(id_buf);
 457         attr->config = id;
 458         attr->type = PERF_TYPE_TRACEPOINT;
 459         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 460
 461         attr->sample_type |= PERF_SAMPLE_RAW;
 462         attr->sample_type |= PERF_SAMPLE_TIME;
 463         attr->sample_type |= PERF_SAMPLE_CPU;
 464
 465         attr->sample_period = 1;
 466
 467
 468         return EVT_HANDLED;
 469 }
 470
 471 /* sys + ':' + event + ':' + flags*/
 472 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 473 static enum event_result
 474 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
 475                                 const char *evt_exp, char *flags)
 476 {
 477         char evt_path[MAXPATHLEN];
 478         struct dirent *evt_ent;
 479         DIR *evt_dir;
 480
 481         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 482         evt_dir = opendir(evt_path);
 483
 484         if (!evt_dir) {
 485                 perror("Can't open event dir");
 486                 return EVT_FAILED;
 487         }
 488
 489         while ((evt_ent = readdir(evt_dir))) {
 490                 char event_opt[MAX_EVOPT_LEN + 1];
 491                 int len;
 492
 493                 if (!strcmp(evt_ent->d_name, ".")
 494                     || !strcmp(evt_ent->d_name, "..")
 495                     || !strcmp(evt_ent->d_name, "enable")
 496                     || !strcmp(evt_ent->d_name, "filter"))
 497                         continue;
 498
 499                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 500                         continue;
 501
 502                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 503                                evt_ent->d_name, flags ? ":" : "",
 504                                flags ?: "");
 505                 if (len < 0)
 506                         return EVT_FAILED;
 507
 508                 if (parse_events(opt, event_opt, 0))
 509                         return EVT_FAILED;
 510         }
 511
 512         return EVT_HANDLED_ALL;
 513 }
 514
 515 static enum event_result
 516 parse_tracepoint_event(const struct option *opt, const char **strp,
 517                        struct perf_event_attr *attr)
 518 {
 519         const char *evt_name;
 520         char *flags = NULL, *comma_loc;
 521         char sys_name[MAX_EVENT_LENGTH];
 522         unsigned int sys_length, evt_length;
 523
 524         if (debugfs_valid_mountpoint(debugfs_path))
 525                 return 0;
 526
 527         evt_name = strchr(*strp, ':');
 528         if (!evt_name)
 529                 return EVT_FAILED;
 530
 531         sys_length = evt_name - *strp;
 532         if (sys_length >= MAX_EVENT_LENGTH)
 533                 return 0;
 534
 535         strncpy(sys_name, *strp, sys_length);
 536         sys_name[sys_length] = '\0';
 537         evt_name = evt_name + 1;
 538
 539         comma_loc = strchr(evt_name, ',');
 540         if (comma_loc) {
 541                 /* take the event name up to the comma */
 542                 evt_name = strndup(evt_name, comma_loc - evt_name);
 543         }
 544         flags = strchr(evt_name, ':');
 545         if (flags) {
 546                 /* split it out: */
 547                 evt_name = strndup(evt_name, flags - evt_name);
 548                 flags++;
 549         }
 550
 551         evt_length = strlen(evt_name);
 552         if (evt_length >= MAX_EVENT_LENGTH)
 553                 return EVT_FAILED;
 554         if (strpbrk(evt_name, "*?")) {
 555                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
 556                 return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
 557                                                        flags);
 558         } else {
 559                 return parse_single_tracepoint_event(sys_name, evt_name,
 560                                                      evt_length, attr, strp);
 561         }
 562 }
 563
 564 static enum event_result
 565 parse_breakpoint_type(const char *type, const char **strp,
 566                       struct perf_event_attr *attr)
 567 {
 568         int i;
 569
 570         for (i = 0; i < 3; i++) {
 571                 if (!type[i])
 572                         break;
 573
 574                 switch (type[i]) {
 575                 case 'r':
 576                         attr->bp_type |= HW_BREAKPOINT_R;
 577                         break;
 578                 case 'w':
 579                         attr->bp_type |= HW_BREAKPOINT_W;
 580                         break;
 581                 case 'x':
 582                         attr->bp_type |= HW_BREAKPOINT_X;
 583                         break;
 584                 default:
 585                         return EVT_FAILED;
 586                 }
 587         }
 588         if (!attr->bp_type) /* Default */
 589                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 590
 591         *strp = type + i;
 592
 593         return EVT_HANDLED;
 594 }
 595
 596 static enum event_result
 597 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 598 {
 599         const char *target;
 600         const char *type;
 601         char *endaddr;
 602         u64 addr;
 603         enum event_result err;
 604
 605         target = strchr(*strp, ':');
 606         if (!target)
 607                 return EVT_FAILED;
 608
 609         if (strncmp(*strp, "mem", target - *strp) != 0)
 610                 return EVT_FAILED;
 611
 612         target++;
 613
 614         addr = strtoull(target, &endaddr, 0);
 615         if (target == endaddr)
 616                 return EVT_FAILED;
 617
 618         attr->bp_addr = addr;
 619         *strp = endaddr;
 620
 621         type = strchr(target, ':');
 622
 623         /* If no type is defined, just rw as default */
 624         if (!type) {
 625                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 626         } else {
 627                 err = parse_breakpoint_type(++type, strp, attr);
 628                 if (err == EVT_FAILED)
 629                         return EVT_FAILED;
 630         }
 631
 632         /*
 633          * We should find a nice way to override the access length
 634          * Provide some defaults for now
 635          */
 636         if (attr->bp_type == HW_BREAKPOINT_X)
 637                 attr->bp_len = sizeof(long);
 638         else
 639                 attr->bp_len = HW_BREAKPOINT_LEN_4;
 640
 641         attr->type = PERF_TYPE_BREAKPOINT;
 642
 643         return EVT_HANDLED;
 644 }
 645
 646 static int check_events(const char *str, unsigned int i)
 647 {
 648         int n;
 649
 650         n = strlen(event_symbols[i].symbol);
 651         if (!strncmp(str, event_symbols[i].symbol, n))
 652                 return n;
 653
 654         n = strlen(event_symbols[i].alias);
 655         if (n)
 656                 if (!strncmp(str, event_symbols[i].alias, n))
 657                         return n;
 658         return 0;
 659 }
 660
 661 static enum event_result
 662 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 663 {
 664         const char *str = *strp;
 665         unsigned int i;
 666         int n;
 667
 668         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 669                 n = check_events(str, i);
 670                 if (n > 0) {
 671                         attr->type = event_symbols[i].type;
 672                         attr->config = event_symbols[i].config;
 673                         *strp = str + n;
 674                         return EVT_HANDLED;
 675                 }
 676         }
 677         return EVT_FAILED;
 678 }
 679
 680 static enum event_result
 681 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 682 {
 683         const char *str = *strp;
 684         u64 config;
 685         int n;
 686
 687         if (*str != 'r')
 688                 return EVT_FAILED;
 689         n = hex2u64(str + 1, &config);
 690         if (n > 0) {
 691                 *strp = str + n + 1;
 692                 attr->type = PERF_TYPE_RAW;
 693                 attr->config = config;
 694                 return EVT_HANDLED;
 695         }
 696         return EVT_FAILED;
 697 }
 698
 699 static enum event_result
 700 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 701 {
 702         const char *str = *strp;
 703         char *endp;
 704         unsigned long type;
 705         u64 config;
 706
 707         type = strtoul(str, &endp, 0);
 708         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 709                 str = endp + 1;
 710                 config = strtoul(str, &endp, 0);
 711                 if (endp > str) {
 712                         attr->type = type;
 713                         attr->config = config;
 714                         *strp = endp;
 715                         return EVT_HANDLED;
 716                 }
 717         }
 718         return EVT_FAILED;
 719 }
 720
 721 static enum event_result
 722 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 723 {
 724         const char *str = *strp;
 725         int exclude = 0;
 726         int eu = 0, ek = 0, eh = 0, precise = 0;
 727
 728         if (*str++ != ':')
 729                 return 0;
 730         while (*str) {
 731                 if (*str == 'u') {
 732                         if (!exclude)
 733                                 exclude = eu = ek = eh = 1;
 734                         eu = 0;
 735                 } else if (*str == 'k') {
 736                         if (!exclude)
 737                                 exclude = eu = ek = eh = 1;
 738                         ek = 0;
 739                 } else if (*str == 'h') {
 740                         if (!exclude)
 741                                 exclude = eu = ek = eh = 1;
 742                         eh = 0;
 743                 } else if (*str == 'p') {
 744                         precise++;
 745                 } else
 746                         break;
 747
 748                 ++str;
 749         }
 750         if (str >= *strp + 2) {
 751                 *strp = str;
 752                 attr->exclude_user   = eu;
 753                 attr->exclude_kernel = ek;
 754                 attr->exclude_hv     = eh;
 755                 attr->precise_ip     = precise;
 756                 return 1;
 757         }
 758         return 0;
 759 }
 760
 761 /*
 762  * Each event can have multiple symbolic names.
 763  * Symbolic names are (almost) exactly matched.
 764  */
 765 static enum event_result
 766 parse_event_symbols(const struct option *opt, const char **str,
 767                     struct perf_event_attr *attr)
 768 {
 769         enum event_result ret;
 770
 771         ret = parse_tracepoint_event(opt, str, attr);
 772         if (ret != EVT_FAILED)
 773                 goto modifier;
 774
 775         ret = parse_raw_event(str, attr);
 776         if (ret != EVT_FAILED)
 777                 goto modifier;
 778
 779         ret = parse_numeric_event(str, attr);
 780         if (ret != EVT_FAILED)
 781                 goto modifier;
 782
 783         ret = parse_symbolic_event(str, attr);
 784         if (ret != EVT_FAILED)
 785                 goto modifier;
 786
 787         ret = parse_generic_hw_event(str, attr);
 788         if (ret != EVT_FAILED)
 789                 goto modifier;
 790
 791         ret = parse_breakpoint_event(str, attr);
 792         if (ret != EVT_FAILED)
 793                 goto modifier;
 794
 795         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 796         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 797         return EVT_FAILED;
 798
 799 modifier:
 800         parse_event_modifier(str, attr);
 801
 802         return ret;
 803 }
 804
 805 int parse_events(const struct option *opt, const char *str, int unset __used)
 806 {
 807         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 808         struct perf_event_attr attr;
 809         enum event_result ret;
 810         const char *ostr;
 811
 812         for (;;) {
 813                 ostr = str;
 814                 memset(&attr, 0, sizeof(attr));
 815                 ret = parse_event_symbols(opt, &str, &attr);
 816                 if (ret == EVT_FAILED)
 817                         return -1;
 818
 819                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 820                         return -1;
 821
 822                 if (ret != EVT_HANDLED_ALL) {
 823                         struct perf_evsel *evsel;
 824                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
 825                         if (evsel == NULL)
 826                                 return -1;
 827                         perf_evlist__add(evlist, evsel);
 828
 829                         evsel->name = calloc(str - ostr + 1, 1);
 830                         if (!evsel->name)
 831                                 return -1;
 832                         strncpy(evsel->name, ostr, str - ostr);
 833                 }
 834
 835                 if (*str == 0)
 836                         break;
 837                 if (*str == ',')
 838                         ++str;
 839                 while (isspace(*str))
 840                         ++str;
 841         }
 842
 843         return 0;
 844 }
 845
 846 int parse_filter(const struct option *opt, const char *str,
 847                  int unset __used)
 848 {
 849         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 850         struct perf_evsel *last = NULL;
 851
 852         if (evlist->nr_entries > 0)
 853                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 854
 855         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 856                 fprintf(stderr,
 857                         "-F option should follow a -e tracepoint option\n");
 858                 return -1;
 859         }
 860
 861         last->filter = strdup(str);
 862         if (last->filter == NULL) {
 863                 fprintf(stderr, "not enough memory to hold filter string\n");
 864                 return -1;
 865         }
 866
 867         return 0;
 868 }
 869
 870 static const char * const event_type_descriptors[] = {
 871         "Hardware event",
 872         "Software event",
 873         "Tracepoint event",
 874         "Hardware cache event",
 875         "Raw hardware event descriptor",
 876         "Hardware breakpoint",
 877 };
 878
 879 /*
 880  * Print the events from <debugfs_mount_point>/tracing/events
 881  */
 882
 883 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 884 {
 885         DIR *sys_dir, *evt_dir;
 886         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 887         char evt_path[MAXPATHLEN];
 888         char dir_path[MAXPATHLEN];
 889
 890         if (debugfs_valid_mountpoint(debugfs_path))
 891                 return;
 892
 893         sys_dir = opendir(debugfs_path);
 894         if (!sys_dir)
 895                 return;
 896
 897         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 898                 if (subsys_glob != NULL &&
 899                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 900                         continue;
 901
 902                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 903                          sys_dirent.d_name);
 904                 evt_dir = opendir(dir_path);
 905                 if (!evt_dir)
 906                         continue;
 907
 908                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 909                         if (event_glob != NULL &&
 910                             !strglobmatch(evt_dirent.d_name, event_glob))
 911                                 continue;
 912
 913                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 914                                  sys_dirent.d_name, evt_dirent.d_name);
 915                         printf("  %-42s [%s]\n", evt_path,
 916                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 917                 }
 918                 closedir(evt_dir);
 919         }
 920         closedir(sys_dir);
 921 }
 922
 923 /*
 924  * Check whether event is in <debugfs_mount_point>/tracing/events
 925  */
 926
 927 int is_valid_tracepoint(const char *event_string)
 928 {
 929         DIR *sys_dir, *evt_dir;
 930         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 931         char evt_path[MAXPATHLEN];
 932         char dir_path[MAXPATHLEN];
 933
 934         if (debugfs_valid_mountpoint(debugfs_path))
 935                 return 0;
 936
 937         sys_dir = opendir(debugfs_path);
 938         if (!sys_dir)
 939                 return 0;
 940
 941         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 942
 943                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 944                          sys_dirent.d_name);
 945                 evt_dir = opendir(dir_path);
 946                 if (!evt_dir)
 947                         continue;
 948
 949                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 950                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 951                                  sys_dirent.d_name, evt_dirent.d_name);
 952                         if (!strcmp(evt_path, event_string)) {
 953                                 closedir(evt_dir);
 954                                 closedir(sys_dir);
 955                                 return 1;
 956                         }
 957                 }
 958                 closedir(evt_dir);
 959         }
 960         closedir(sys_dir);
 961         return 0;
 962 }
 963
 964 void print_events_type(u8 type)
 965 {
 966         struct event_symbol *syms = event_symbols;
 967         unsigned int i;
 968         char name[64];
 969
 970         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 971                 if (type != syms->type)
 972                         continue;
 973
 974                 if (strlen(syms->alias))
 975                         snprintf(name, sizeof(name),  "%s OR %s",
 976                                  syms->symbol, syms->alias);
 977                 else
 978                         snprintf(name, sizeof(name), "%s", syms->symbol);
 979
 980                 printf("  %-42s [%s]\n", name,
 981                         event_type_descriptors[type]);
 982         }
 983 }
 984
 985 int print_hwcache_events(const char *event_glob)
 986 {
 987         unsigned int type, op, i, printed = 0;
 988
 989         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 990                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 991                         /* skip invalid cache type */
 992                         if (!is_cache_op_valid(type, op))
 993                                 continue;
 994
 995                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 996                                 char *name = event_cache_name(type, op, i);
 997
 998                                 if (event_glob != NULL &&
 999                                     !strglobmatch(name, event_glob))
1000                                         continue;
1001
1002                                 printf("  %-42s [%s]\n", name,
1003                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
1004                                 ++printed;
1005                         }
1006                 }
1007         }
1008
1009         return printed;
1010 }
1011
1012 /*
1013  * Print the help text for the event symbols:
1014  */
1015 void print_events(const char *event_glob)
1016 {
1017         struct event_symbol *syms = event_symbols;
1018         unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1019         char name[40];
1020
1021         printf("\n");
1022         printf("List of pre-defined events (to be used in -e):\n");
1023
1024         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1025                 type = syms->type;
1026
1027                 if (type != prev_type && printed) {
1028                         printf("\n");
1029                         printed = 0;
1030                         ntypes_printed++;
1031                 }
1032
1033                 if (event_glob != NULL &&
1034                     !(strglobmatch(syms->symbol, event_glob) ||
1035                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1036                         continue;
1037
1038                 if (strlen(syms->alias))
1039                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
1040                 else
1041                         strcpy(name, syms->symbol);
1042                 printf("  %-42s [%s]\n", name,
1043                         event_type_descriptors[type]);
1044
1045                 prev_type = type;
1046                 ++printed;
1047         }
1048
1049         if (ntypes_printed) {
1050                 printed = 0;
1051                 printf("\n");
1052         }
1053         print_hwcache_events(event_glob);
1054
1055         if (event_glob != NULL)
1056                 return;
1057
1058         printf("\n");
1059         printf("  %-42s [%s]\n",
1060                 "rNNN (see 'perf list --help' on how to encode it)",
1061                event_type_descriptors[PERF_TYPE_RAW]);
1062         printf("\n");
1063
1064         printf("  %-42s [%s]\n",
1065                         "mem:<addr>[:access]",
1066                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1067         printf("\n");
1068
1069         print_tracepoint_events(NULL, NULL);
1070
1071         exit(129);
1072 }