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   { CHW(STALLED_CYCLES),        "stalled-cycles",       ""              },
  42
  43   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
  44   { CSW(TASK_CLOCK),            "task-clock",           ""              },
  45   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
  46   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
  47   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
  48   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
  49   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
  50   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
  51   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
  52 };
  53
  54 #define __PERF_EVENT_FIELD(config, name) \
  55         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  56
  57 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
  58 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
  59 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
  60 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
  61
  62 static const char *hw_event_names[] = {
  63         "cycles",
  64         "instructions",
  65         "cache-references",
  66         "cache-misses",
  67         "branches",
  68         "branch-misses",
  69         "bus-cycles",
  70 };
  71
  72 static const char *sw_event_names[] = {
  73         "cpu-clock-msecs",
  74         "task-clock-msecs",
  75         "page-faults",
  76         "context-switches",
  77         "CPU-migrations",
  78         "minor-faults",
  79         "major-faults",
  80         "alignment-faults",
  81         "emulation-faults",
  82 };
  83
  84 #define MAX_ALIASES 8
  85
  86 static const char *hw_cache[][MAX_ALIASES] = {
  87  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  88  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  89  { "LLC",       "L2"                                                    },
  90  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  91  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  92  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  93 };
  94
  95 static const char *hw_cache_op[][MAX_ALIASES] = {
  96  { "load",      "loads",        "read",                                 },
  97  { "store",     "stores",       "write",                                },
  98  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
  99 };
 100
 101 static const char *hw_cache_result[][MAX_ALIASES] = {
 102  { "refs",      "Reference",    "ops",          "access",               },
 103  { "misses",    "miss",                                                 },
 104 };
 105
 106 #define C(x)            PERF_COUNT_HW_CACHE_##x
 107 #define CACHE_READ      (1 << C(OP_READ))
 108 #define CACHE_WRITE     (1 << C(OP_WRITE))
 109 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 110 #define COP(x)          (1 << x)
 111
 112 /*
 113  * cache operartion stat
 114  * L1I : Read and prefetch only
 115  * ITLB and BPU : Read-only
 116  */
 117 static unsigned long hw_cache_stat[C(MAX)] = {
 118  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 119  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 120  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 121  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 122  [C(ITLB)]      = (CACHE_READ),
 123  [C(BPU)]       = (CACHE_READ),
 124 };
 125
 126 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 127         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 128         if (sys_dirent.d_type == DT_DIR &&                                     \
 129            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 130            (strcmp(sys_dirent.d_name, "..")))
 131
 132 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 133 {
 134         char evt_path[MAXPATHLEN];
 135         int fd;
 136
 137         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 138                         sys_dir->d_name, evt_dir->d_name);
 139         fd = open(evt_path, O_RDONLY);
 140         if (fd < 0)
 141                 return -EINVAL;
 142         close(fd);
 143
 144         return 0;
 145 }
 146
 147 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 148         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 149         if (evt_dirent.d_type == DT_DIR &&                                     \
 150            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 151            (strcmp(evt_dirent.d_name, "..")) &&                                \
 152            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 153
 154 #define MAX_EVENT_LENGTH 512
 155
 156
 157 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 158 {
 159         struct tracepoint_path *path = NULL;
 160         DIR *sys_dir, *evt_dir;
 161         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 162         char id_buf[4];
 163         int fd;
 164         u64 id;
 165         char evt_path[MAXPATHLEN];
 166         char dir_path[MAXPATHLEN];
 167
 168         if (debugfs_valid_mountpoint(debugfs_path))
 169                 return NULL;
 170
 171         sys_dir = opendir(debugfs_path);
 172         if (!sys_dir)
 173                 return NULL;
 174
 175         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 176
 177                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 178                          sys_dirent.d_name);
 179                 evt_dir = opendir(dir_path);
 180                 if (!evt_dir)
 181                         continue;
 182
 183                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 184
 185                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 186                                  evt_dirent.d_name);
 187                         fd = open(evt_path, O_RDONLY);
 188                         if (fd < 0)
 189                                 continue;
 190                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 191                                 close(fd);
 192                                 continue;
 193                         }
 194                         close(fd);
 195                         id = atoll(id_buf);
 196                         if (id == config) {
 197                                 closedir(evt_dir);
 198                                 closedir(sys_dir);
 199                                 path = zalloc(sizeof(*path));
 200                                 path->system = malloc(MAX_EVENT_LENGTH);
 201                                 if (!path->system) {
 202                                         free(path);
 203                                         return NULL;
 204                                 }
 205                                 path->name = malloc(MAX_EVENT_LENGTH);
 206                                 if (!path->name) {
 207                                         free(path->system);
 208                                         free(path);
 209                                         return NULL;
 210                                 }
 211                                 strncpy(path->system, sys_dirent.d_name,
 212                                         MAX_EVENT_LENGTH);
 213                                 strncpy(path->name, evt_dirent.d_name,
 214                                         MAX_EVENT_LENGTH);
 215                                 return path;
 216                         }
 217                 }
 218                 closedir(evt_dir);
 219         }
 220
 221         closedir(sys_dir);
 222         return NULL;
 223 }
 224
 225 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 226 static const char *tracepoint_id_to_name(u64 config)
 227 {
 228         static char buf[TP_PATH_LEN];
 229         struct tracepoint_path *path;
 230
 231         path = tracepoint_id_to_path(config);
 232         if (path) {
 233                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 234                 free(path->name);
 235                 free(path->system);
 236                 free(path);
 237         } else
 238                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 239
 240         return buf;
 241 }
 242
 243 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 244 {
 245         if (hw_cache_stat[cache_type] & COP(cache_op))
 246                 return 1;       /* valid */
 247         else
 248                 return 0;       /* invalid */
 249 }
 250
 251 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 252 {
 253         static char name[50];
 254
 255         if (cache_result) {
 256                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 257                         hw_cache_op[cache_op][0],
 258                         hw_cache_result[cache_result][0]);
 259         } else {
 260                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 261                         hw_cache_op[cache_op][1]);
 262         }
 263
 264         return name;
 265 }
 266
 267 const char *event_type(int type)
 268 {
 269         switch (type) {
 270         case PERF_TYPE_HARDWARE:
 271                 return "hardware";
 272
 273         case PERF_TYPE_SOFTWARE:
 274                 return "software";
 275
 276         case PERF_TYPE_TRACEPOINT:
 277                 return "tracepoint";
 278
 279         case PERF_TYPE_HW_CACHE:
 280                 return "hardware-cache";
 281
 282         default:
 283                 break;
 284         }
 285
 286         return "unknown";
 287 }
 288
 289 const char *event_name(struct perf_evsel *evsel)
 290 {
 291         u64 config = evsel->attr.config;
 292         int type = evsel->attr.type;
 293
 294         if (evsel->name)
 295                 return evsel->name;
 296
 297         return __event_name(type, config);
 298 }
 299
 300 const char *__event_name(int type, u64 config)
 301 {
 302         static char buf[32];
 303
 304         if (type == PERF_TYPE_RAW) {
 305                 sprintf(buf, "raw 0x%" PRIx64, config);
 306                 return buf;
 307         }
 308
 309         switch (type) {
 310         case PERF_TYPE_HARDWARE:
 311                 if (config < PERF_COUNT_HW_MAX)
 312                         return hw_event_names[config];
 313                 return "unknown-hardware";
 314
 315         case PERF_TYPE_HW_CACHE: {
 316                 u8 cache_type, cache_op, cache_result;
 317
 318                 cache_type   = (config >>  0) & 0xff;
 319                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 320                         return "unknown-ext-hardware-cache-type";
 321
 322                 cache_op     = (config >>  8) & 0xff;
 323                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 324                         return "unknown-ext-hardware-cache-op";
 325
 326                 cache_result = (config >> 16) & 0xff;
 327                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 328                         return "unknown-ext-hardware-cache-result";
 329
 330                 if (!is_cache_op_valid(cache_type, cache_op))
 331                         return "invalid-cache";
 332
 333                 return event_cache_name(cache_type, cache_op, cache_result);
 334         }
 335
 336         case PERF_TYPE_SOFTWARE:
 337                 if (config < PERF_COUNT_SW_MAX)
 338                         return sw_event_names[config];
 339                 return "unknown-software";
 340
 341         case PERF_TYPE_TRACEPOINT:
 342                 return tracepoint_id_to_name(config);
 343
 344         default:
 345                 break;
 346         }
 347
 348         return "unknown";
 349 }
 350
 351 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 352 {
 353         int i, j;
 354         int n, longest = -1;
 355
 356         for (i = 0; i < size; i++) {
 357                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 358                         n = strlen(names[i][j]);
 359                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 360                                 longest = n;
 361                 }
 362                 if (longest > 0) {
 363                         *str += longest;
 364                         return i;
 365                 }
 366         }
 367
 368         return -1;
 369 }
 370
 371 static enum event_result
 372 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 373 {
 374         const char *s = *str;
 375         int cache_type = -1, cache_op = -1, cache_result = -1;
 376
 377         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 378         /*
 379          * No fallback - if we cannot get a clear cache type
 380          * then bail out:
 381          */
 382         if (cache_type == -1)
 383                 return EVT_FAILED;
 384
 385         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 386                 ++s;
 387
 388                 if (cache_op == -1) {
 389                         cache_op = parse_aliases(&s, hw_cache_op,
 390                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 391                         if (cache_op >= 0) {
 392                                 if (!is_cache_op_valid(cache_type, cache_op))
 393                                         return 0;
 394                                 continue;
 395                         }
 396                 }
 397
 398                 if (cache_result == -1) {
 399                         cache_result = parse_aliases(&s, hw_cache_result,
 400                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 401                         if (cache_result >= 0)
 402                                 continue;
 403                 }
 404
 405                 /*
 406                  * Can't parse this as a cache op or result, so back up
 407                  * to the '-'.
 408                  */
 409                 --s;
 410                 break;
 411         }
 412
 413         /*
 414          * Fall back to reads:
 415          */
 416         if (cache_op == -1)
 417                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 418
 419         /*
 420          * Fall back to accesses:
 421          */
 422         if (cache_result == -1)
 423                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 424
 425         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 426         attr->type = PERF_TYPE_HW_CACHE;
 427
 428         *str = s;
 429         return EVT_HANDLED;
 430 }
 431
 432 static enum event_result
 433 parse_single_tracepoint_event(char *sys_name,
 434                               const char *evt_name,
 435                               unsigned int evt_length,
 436                               struct perf_event_attr *attr,
 437                               const char **strp)
 438 {
 439         char evt_path[MAXPATHLEN];
 440         char id_buf[4];
 441         u64 id;
 442         int fd;
 443
 444         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 445                  sys_name, evt_name);
 446
 447         fd = open(evt_path, O_RDONLY);
 448         if (fd < 0)
 449                 return EVT_FAILED;
 450
 451         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 452                 close(fd);
 453                 return EVT_FAILED;
 454         }
 455
 456         close(fd);
 457         id = atoll(id_buf);
 458         attr->config = id;
 459         attr->type = PERF_TYPE_TRACEPOINT;
 460         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 461
 462         attr->sample_type |= PERF_SAMPLE_RAW;
 463         attr->sample_type |= PERF_SAMPLE_TIME;
 464         attr->sample_type |= PERF_SAMPLE_CPU;
 465
 466         attr->sample_period = 1;
 467
 468
 469         return EVT_HANDLED;
 470 }
 471
 472 /* sys + ':' + event + ':' + flags*/
 473 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 474 static enum event_result
 475 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
 476                                 const char *evt_exp, char *flags)
 477 {
 478         char evt_path[MAXPATHLEN];
 479         struct dirent *evt_ent;
 480         DIR *evt_dir;
 481
 482         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 483         evt_dir = opendir(evt_path);
 484
 485         if (!evt_dir) {
 486                 perror("Can't open event dir");
 487                 return EVT_FAILED;
 488         }
 489
 490         while ((evt_ent = readdir(evt_dir))) {
 491                 char event_opt[MAX_EVOPT_LEN + 1];
 492                 int len;
 493
 494                 if (!strcmp(evt_ent->d_name, ".")
 495                     || !strcmp(evt_ent->d_name, "..")
 496                     || !strcmp(evt_ent->d_name, "enable")
 497                     || !strcmp(evt_ent->d_name, "filter"))
 498                         continue;
 499
 500                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 501                         continue;
 502
 503                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 504                                evt_ent->d_name, flags ? ":" : "",
 505                                flags ?: "");
 506                 if (len < 0)
 507                         return EVT_FAILED;
 508
 509                 if (parse_events(opt, event_opt, 0))
 510                         return EVT_FAILED;
 511         }
 512
 513         return EVT_HANDLED_ALL;
 514 }
 515
 516 static enum event_result
 517 parse_tracepoint_event(const struct option *opt, const char **strp,
 518                        struct perf_event_attr *attr)
 519 {
 520         const char *evt_name;
 521         char *flags = NULL, *comma_loc;
 522         char sys_name[MAX_EVENT_LENGTH];
 523         unsigned int sys_length, evt_length;
 524
 525         if (debugfs_valid_mountpoint(debugfs_path))
 526                 return 0;
 527
 528         evt_name = strchr(*strp, ':');
 529         if (!evt_name)
 530                 return EVT_FAILED;
 531
 532         sys_length = evt_name - *strp;
 533         if (sys_length >= MAX_EVENT_LENGTH)
 534                 return 0;
 535
 536         strncpy(sys_name, *strp, sys_length);
 537         sys_name[sys_length] = '\0';
 538         evt_name = evt_name + 1;
 539
 540         comma_loc = strchr(evt_name, ',');
 541         if (comma_loc) {
 542                 /* take the event name up to the comma */
 543                 evt_name = strndup(evt_name, comma_loc - evt_name);
 544         }
 545         flags = strchr(evt_name, ':');
 546         if (flags) {
 547                 /* split it out: */
 548                 evt_name = strndup(evt_name, flags - evt_name);
 549                 flags++;
 550         }
 551
 552         evt_length = strlen(evt_name);
 553         if (evt_length >= MAX_EVENT_LENGTH)
 554                 return EVT_FAILED;
 555         if (strpbrk(evt_name, "*?")) {
 556                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
 557                 return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
 558                                                        flags);
 559         } else {
 560                 return parse_single_tracepoint_event(sys_name, evt_name,
 561                                                      evt_length, attr, strp);
 562         }
 563 }
 564
 565 static enum event_result
 566 parse_breakpoint_type(const char *type, const char **strp,
 567                       struct perf_event_attr *attr)
 568 {
 569         int i;
 570
 571         for (i = 0; i < 3; i++) {
 572                 if (!type[i])
 573                         break;
 574
 575                 switch (type[i]) {
 576                 case 'r':
 577                         attr->bp_type |= HW_BREAKPOINT_R;
 578                         break;
 579                 case 'w':
 580                         attr->bp_type |= HW_BREAKPOINT_W;
 581                         break;
 582                 case 'x':
 583                         attr->bp_type |= HW_BREAKPOINT_X;
 584                         break;
 585                 default:
 586                         return EVT_FAILED;
 587                 }
 588         }
 589         if (!attr->bp_type) /* Default */
 590                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 591
 592         *strp = type + i;
 593
 594         return EVT_HANDLED;
 595 }
 596
 597 static enum event_result
 598 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 599 {
 600         const char *target;
 601         const char *type;
 602         char *endaddr;
 603         u64 addr;
 604         enum event_result err;
 605
 606         target = strchr(*strp, ':');
 607         if (!target)
 608                 return EVT_FAILED;
 609
 610         if (strncmp(*strp, "mem", target - *strp) != 0)
 611                 return EVT_FAILED;
 612
 613         target++;
 614
 615         addr = strtoull(target, &endaddr, 0);
 616         if (target == endaddr)
 617                 return EVT_FAILED;
 618
 619         attr->bp_addr = addr;
 620         *strp = endaddr;
 621
 622         type = strchr(target, ':');
 623
 624         /* If no type is defined, just rw as default */
 625         if (!type) {
 626                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 627         } else {
 628                 err = parse_breakpoint_type(++type, strp, attr);
 629                 if (err == EVT_FAILED)
 630                         return EVT_FAILED;
 631         }
 632
 633         /*
 634          * We should find a nice way to override the access length
 635          * Provide some defaults for now
 636          */
 637         if (attr->bp_type == HW_BREAKPOINT_X)
 638                 attr->bp_len = sizeof(long);
 639         else
 640                 attr->bp_len = HW_BREAKPOINT_LEN_4;
 641
 642         attr->type = PERF_TYPE_BREAKPOINT;
 643
 644         return EVT_HANDLED;
 645 }
 646
 647 static int check_events(const char *str, unsigned int i)
 648 {
 649         int n;
 650
 651         n = strlen(event_symbols[i].symbol);
 652         if (!strncasecmp(str, event_symbols[i].symbol, n))
 653                 return n;
 654
 655         n = strlen(event_symbols[i].alias);
 656         if (n) {
 657                 if (!strncasecmp(str, event_symbols[i].alias, n))
 658                         return n;
 659         }
 660
 661         return 0;
 662 }
 663
 664 static enum event_result
 665 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 666 {
 667         const char *str = *strp;
 668         unsigned int i;
 669         int n;
 670
 671         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 672                 n = check_events(str, i);
 673                 if (n > 0) {
 674                         attr->type = event_symbols[i].type;
 675                         attr->config = event_symbols[i].config;
 676                         *strp = str + n;
 677                         return EVT_HANDLED;
 678                 }
 679         }
 680         return EVT_FAILED;
 681 }
 682
 683 static enum event_result
 684 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 685 {
 686         const char *str = *strp;
 687         u64 config;
 688         int n;
 689
 690         if (*str != 'r')
 691                 return EVT_FAILED;
 692         n = hex2u64(str + 1, &config);
 693         if (n > 0) {
 694                 *strp = str + n + 1;
 695                 attr->type = PERF_TYPE_RAW;
 696                 attr->config = config;
 697                 return EVT_HANDLED;
 698         }
 699         return EVT_FAILED;
 700 }
 701
 702 static enum event_result
 703 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 704 {
 705         const char *str = *strp;
 706         char *endp;
 707         unsigned long type;
 708         u64 config;
 709
 710         type = strtoul(str, &endp, 0);
 711         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 712                 str = endp + 1;
 713                 config = strtoul(str, &endp, 0);
 714                 if (endp > str) {
 715                         attr->type = type;
 716                         attr->config = config;
 717                         *strp = endp;
 718                         return EVT_HANDLED;
 719                 }
 720         }
 721         return EVT_FAILED;
 722 }
 723
 724 static enum event_result
 725 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 726 {
 727         const char *str = *strp;
 728         int exclude = 0;
 729         int eu = 0, ek = 0, eh = 0, precise = 0;
 730
 731         if (*str++ != ':')
 732                 return 0;
 733         while (*str) {
 734                 if (*str == 'u') {
 735                         if (!exclude)
 736                                 exclude = eu = ek = eh = 1;
 737                         eu = 0;
 738                 } else if (*str == 'k') {
 739                         if (!exclude)
 740                                 exclude = eu = ek = eh = 1;
 741                         ek = 0;
 742                 } else if (*str == 'h') {
 743                         if (!exclude)
 744                                 exclude = eu = ek = eh = 1;
 745                         eh = 0;
 746                 } else if (*str == 'p') {
 747                         precise++;
 748                 } else
 749                         break;
 750
 751                 ++str;
 752         }
 753         if (str >= *strp + 2) {
 754                 *strp = str;
 755                 attr->exclude_user   = eu;
 756                 attr->exclude_kernel = ek;
 757                 attr->exclude_hv     = eh;
 758                 attr->precise_ip     = precise;
 759                 return 1;
 760         }
 761         return 0;
 762 }
 763
 764 /*
 765  * Each event can have multiple symbolic names.
 766  * Symbolic names are (almost) exactly matched.
 767  */
 768 static enum event_result
 769 parse_event_symbols(const struct option *opt, const char **str,
 770                     struct perf_event_attr *attr)
 771 {
 772         enum event_result ret;
 773
 774         ret = parse_tracepoint_event(opt, str, attr);
 775         if (ret != EVT_FAILED)
 776                 goto modifier;
 777
 778         ret = parse_raw_event(str, attr);
 779         if (ret != EVT_FAILED)
 780                 goto modifier;
 781
 782         ret = parse_numeric_event(str, attr);
 783         if (ret != EVT_FAILED)
 784                 goto modifier;
 785
 786         ret = parse_symbolic_event(str, attr);
 787         if (ret != EVT_FAILED)
 788                 goto modifier;
 789
 790         ret = parse_generic_hw_event(str, attr);
 791         if (ret != EVT_FAILED)
 792                 goto modifier;
 793
 794         ret = parse_breakpoint_event(str, attr);
 795         if (ret != EVT_FAILED)
 796                 goto modifier;
 797
 798         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 799         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 800         return EVT_FAILED;
 801
 802 modifier:
 803         parse_event_modifier(str, attr);
 804
 805         return ret;
 806 }
 807
 808 int parse_events(const struct option *opt, const char *str, int unset __used)
 809 {
 810         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 811         struct perf_event_attr attr;
 812         enum event_result ret;
 813         const char *ostr;
 814
 815         for (;;) {
 816                 ostr = str;
 817                 memset(&attr, 0, sizeof(attr));
 818                 ret = parse_event_symbols(opt, &str, &attr);
 819                 if (ret == EVT_FAILED)
 820                         return -1;
 821
 822                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 823                         return -1;
 824
 825                 if (ret != EVT_HANDLED_ALL) {
 826                         struct perf_evsel *evsel;
 827                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
 828                         if (evsel == NULL)
 829                                 return -1;
 830                         perf_evlist__add(evlist, evsel);
 831
 832                         evsel->name = calloc(str - ostr + 1, 1);
 833                         if (!evsel->name)
 834                                 return -1;
 835                         strncpy(evsel->name, ostr, str - ostr);
 836                 }
 837
 838                 if (*str == 0)
 839                         break;
 840                 if (*str == ',')
 841                         ++str;
 842                 while (isspace(*str))
 843                         ++str;
 844         }
 845
 846         return 0;
 847 }
 848
 849 int parse_filter(const struct option *opt, const char *str,
 850                  int unset __used)
 851 {
 852         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 853         struct perf_evsel *last = NULL;
 854
 855         if (evlist->nr_entries > 0)
 856                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 857
 858         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 859                 fprintf(stderr,
 860                         "-F option should follow a -e tracepoint option\n");
 861                 return -1;
 862         }
 863
 864         last->filter = strdup(str);
 865         if (last->filter == NULL) {
 866                 fprintf(stderr, "not enough memory to hold filter string\n");
 867                 return -1;
 868         }
 869
 870         return 0;
 871 }
 872
 873 static const char * const event_type_descriptors[] = {
 874         "Hardware event",
 875         "Software event",
 876         "Tracepoint event",
 877         "Hardware cache event",
 878         "Raw hardware event descriptor",
 879         "Hardware breakpoint",
 880 };
 881
 882 /*
 883  * Print the events from <debugfs_mount_point>/tracing/events
 884  */
 885
 886 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 887 {
 888         DIR *sys_dir, *evt_dir;
 889         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 890         char evt_path[MAXPATHLEN];
 891         char dir_path[MAXPATHLEN];
 892
 893         if (debugfs_valid_mountpoint(debugfs_path))
 894                 return;
 895
 896         sys_dir = opendir(debugfs_path);
 897         if (!sys_dir)
 898                 return;
 899
 900         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 901                 if (subsys_glob != NULL &&
 902                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 903                         continue;
 904
 905                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 906                          sys_dirent.d_name);
 907                 evt_dir = opendir(dir_path);
 908                 if (!evt_dir)
 909                         continue;
 910
 911                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 912                         if (event_glob != NULL &&
 913                             !strglobmatch(evt_dirent.d_name, event_glob))
 914                                 continue;
 915
 916                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 917                                  sys_dirent.d_name, evt_dirent.d_name);
 918                         printf("  %-42s [%s]\n", evt_path,
 919                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 920                 }
 921                 closedir(evt_dir);
 922         }
 923         closedir(sys_dir);
 924 }
 925
 926 /*
 927  * Check whether event is in <debugfs_mount_point>/tracing/events
 928  */
 929
 930 int is_valid_tracepoint(const char *event_string)
 931 {
 932         DIR *sys_dir, *evt_dir;
 933         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 934         char evt_path[MAXPATHLEN];
 935         char dir_path[MAXPATHLEN];
 936
 937         if (debugfs_valid_mountpoint(debugfs_path))
 938                 return 0;
 939
 940         sys_dir = opendir(debugfs_path);
 941         if (!sys_dir)
 942                 return 0;
 943
 944         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 945
 946                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 947                          sys_dirent.d_name);
 948                 evt_dir = opendir(dir_path);
 949                 if (!evt_dir)
 950                         continue;
 951
 952                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 953                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 954                                  sys_dirent.d_name, evt_dirent.d_name);
 955                         if (!strcmp(evt_path, event_string)) {
 956                                 closedir(evt_dir);
 957                                 closedir(sys_dir);
 958                                 return 1;
 959                         }
 960                 }
 961                 closedir(evt_dir);
 962         }
 963         closedir(sys_dir);
 964         return 0;
 965 }
 966
 967 void print_events_type(u8 type)
 968 {
 969         struct event_symbol *syms = event_symbols;
 970         unsigned int i;
 971         char name[64];
 972
 973         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 974                 if (type != syms->type)
 975                         continue;
 976
 977                 if (strlen(syms->alias))
 978                         snprintf(name, sizeof(name),  "%s OR %s",
 979                                  syms->symbol, syms->alias);
 980                 else
 981                         snprintf(name, sizeof(name), "%s", syms->symbol);
 982
 983                 printf("  %-42s [%s]\n", name,
 984                         event_type_descriptors[type]);
 985         }
 986 }
 987
 988 int print_hwcache_events(const char *event_glob)
 989 {
 990         unsigned int type, op, i, printed = 0;
 991
 992         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 993                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 994                         /* skip invalid cache type */
 995                         if (!is_cache_op_valid(type, op))
 996                                 continue;
 997
 998                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 999                                 char *name = event_cache_name(type, op, i);
1000
1001                                 if (event_glob != NULL &&
1002                                     !strglobmatch(name, event_glob))
1003                                         continue;
1004
1005                                 printf("  %-42s [%s]\n", name,
1006                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
1007                                 ++printed;
1008                         }
1009                 }
1010         }
1011
1012         return printed;
1013 }
1014
1015 /*
1016  * Print the help text for the event symbols:
1017  */
1018 void print_events(const char *event_glob)
1019 {
1020         struct event_symbol *syms = event_symbols;
1021         unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1022         char name[40];
1023
1024         printf("\n");
1025         printf("List of pre-defined events (to be used in -e):\n");
1026
1027         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1028                 type = syms->type;
1029
1030                 if (type != prev_type && printed) {
1031                         printf("\n");
1032                         printed = 0;
1033                         ntypes_printed++;
1034                 }
1035
1036                 if (event_glob != NULL &&
1037                     !(strglobmatch(syms->symbol, event_glob) ||
1038                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1039                         continue;
1040
1041                 if (strlen(syms->alias))
1042                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
1043                 else
1044                         strcpy(name, syms->symbol);
1045                 printf("  %-42s [%s]\n", name,
1046                         event_type_descriptors[type]);
1047
1048                 prev_type = type;
1049                 ++printed;
1050         }
1051
1052         if (ntypes_printed) {
1053                 printed = 0;
1054                 printf("\n");
1055         }
1056         print_hwcache_events(event_glob);
1057
1058         if (event_glob != NULL)
1059                 return;
1060
1061         printf("\n");
1062         printf("  %-42s [%s]\n",
1063                 "rNNN (see 'perf list --help' on how to encode it)",
1064                event_type_descriptors[PERF_TYPE_RAW]);
1065         printf("\n");
1066
1067         printf("  %-42s [%s]\n",
1068                         "mem:<addr>[:access]",
1069                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1070         printf("\n");
1071
1072         print_tracepoint_events(NULL, NULL);
1073
1074         exit(129);
1075 }