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 "symbol.h"
   9 #include "cache.h"
  10 #include "header.h"
  11 #include "debugfs.h"
  12
  13 int                             nr_counters;
  14
  15 struct perf_event_attr          attrs[MAX_COUNTERS];
  16 char                            *filters[MAX_COUNTERS];
  17
  18 struct event_symbol {
  19         u8              type;
  20         u64             config;
  21         const char      *symbol;
  22         const char      *alias;
  23 };
  24
  25 enum event_result {
  26         EVT_FAILED,
  27         EVT_HANDLED,
  28         EVT_HANDLED_ALL
  29 };
  30
  31 char debugfs_path[MAXPATHLEN];
  32
  33 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
  34 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
  35
  36 static struct event_symbol event_symbols[] = {
  37   { CHW(CPU_CYCLES),            "cpu-cycles",           "cycles"        },
  38   { CHW(INSTRUCTIONS),          "instructions",         ""              },
  39   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
  40   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
  41   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
  42   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
  43   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
  44
  45   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
  46   { CSW(TASK_CLOCK),            "task-clock",           ""              },
  47   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
  48   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
  49   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
  50   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
  51   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
  52   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
  53   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
  54 };
  55
  56 #define __PERF_EVENT_FIELD(config, name) \
  57         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  58
  59 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
  60 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
  61 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
  62 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
  63
  64 static const char *hw_event_names[] = {
  65         "cycles",
  66         "instructions",
  67         "cache-references",
  68         "cache-misses",
  69         "branches",
  70         "branch-misses",
  71         "bus-cycles",
  72 };
  73
  74 static const char *sw_event_names[] = {
  75         "cpu-clock-msecs",
  76         "task-clock-msecs",
  77         "page-faults",
  78         "context-switches",
  79         "CPU-migrations",
  80         "minor-faults",
  81         "major-faults",
  82         "alignment-faults",
  83         "emulation-faults",
  84 };
  85
  86 #define MAX_ALIASES 8
  87
  88 static const char *hw_cache[][MAX_ALIASES] = {
  89  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  90  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  91  { "LLC",       "L2"                                                    },
  92  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  93  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  94  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  95 };
  96
  97 static const char *hw_cache_op[][MAX_ALIASES] = {
  98  { "load",      "loads",        "read",                                 },
  99  { "store",     "stores",       "write",                                },
 100  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
 101 };
 102
 103 static const char *hw_cache_result[][MAX_ALIASES] = {
 104  { "refs",      "Reference",    "ops",          "access",               },
 105  { "misses",    "miss",                                                 },
 106 };
 107
 108 #define C(x)            PERF_COUNT_HW_CACHE_##x
 109 #define CACHE_READ      (1 << C(OP_READ))
 110 #define CACHE_WRITE     (1 << C(OP_WRITE))
 111 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 112 #define COP(x)          (1 << x)
 113
 114 /*
 115  * cache operartion stat
 116  * L1I : Read and prefetch only
 117  * ITLB and BPU : Read-only
 118  */
 119 static unsigned long hw_cache_stat[C(MAX)] = {
 120  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 121  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 122  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 123  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 124  [C(ITLB)]      = (CACHE_READ),
 125  [C(BPU)]       = (CACHE_READ),
 126 };
 127
 128 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 129         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 130         if (sys_dirent.d_type == DT_DIR &&                                     \
 131            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 132            (strcmp(sys_dirent.d_name, "..")))
 133
 134 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 135 {
 136         char evt_path[MAXPATHLEN];
 137         int fd;
 138
 139         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 140                         sys_dir->d_name, evt_dir->d_name);
 141         fd = open(evt_path, O_RDONLY);
 142         if (fd < 0)
 143                 return -EINVAL;
 144         close(fd);
 145
 146         return 0;
 147 }
 148
 149 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 150         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 151         if (evt_dirent.d_type == DT_DIR &&                                     \
 152            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 153            (strcmp(evt_dirent.d_name, "..")) &&                                \
 154            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 155
 156 #define MAX_EVENT_LENGTH 512
 157
 158
 159 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 160 {
 161         struct tracepoint_path *path = NULL;
 162         DIR *sys_dir, *evt_dir;
 163         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 164         char id_buf[4];
 165         int fd;
 166         u64 id;
 167         char evt_path[MAXPATHLEN];
 168         char dir_path[MAXPATHLEN];
 169
 170         if (debugfs_valid_mountpoint(debugfs_path))
 171                 return NULL;
 172
 173         sys_dir = opendir(debugfs_path);
 174         if (!sys_dir)
 175                 return NULL;
 176
 177         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 178
 179                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 180                          sys_dirent.d_name);
 181                 evt_dir = opendir(dir_path);
 182                 if (!evt_dir)
 183                         continue;
 184
 185                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 186
 187                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 188                                  evt_dirent.d_name);
 189                         fd = open(evt_path, O_RDONLY);
 190                         if (fd < 0)
 191                                 continue;
 192                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 193                                 close(fd);
 194                                 continue;
 195                         }
 196                         close(fd);
 197                         id = atoll(id_buf);
 198                         if (id == config) {
 199                                 closedir(evt_dir);
 200                                 closedir(sys_dir);
 201                                 path = zalloc(sizeof(*path));
 202                                 path->system = malloc(MAX_EVENT_LENGTH);
 203                                 if (!path->system) {
 204                                         free(path);
 205                                         return NULL;
 206                                 }
 207                                 path->name = malloc(MAX_EVENT_LENGTH);
 208                                 if (!path->name) {
 209                                         free(path->system);
 210                                         free(path);
 211                                         return NULL;
 212                                 }
 213                                 strncpy(path->system, sys_dirent.d_name,
 214                                         MAX_EVENT_LENGTH);
 215                                 strncpy(path->name, evt_dirent.d_name,
 216                                         MAX_EVENT_LENGTH);
 217                                 return path;
 218                         }
 219                 }
 220                 closedir(evt_dir);
 221         }
 222
 223         closedir(sys_dir);
 224         return NULL;
 225 }
 226
 227 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 228 static const char *tracepoint_id_to_name(u64 config)
 229 {
 230         static char buf[TP_PATH_LEN];
 231         struct tracepoint_path *path;
 232
 233         path = tracepoint_id_to_path(config);
 234         if (path) {
 235                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 236                 free(path->name);
 237                 free(path->system);
 238                 free(path);
 239         } else
 240                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 241
 242         return buf;
 243 }
 244
 245 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 246 {
 247         if (hw_cache_stat[cache_type] & COP(cache_op))
 248                 return 1;       /* valid */
 249         else
 250                 return 0;       /* invalid */
 251 }
 252
 253 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 254 {
 255         static char name[50];
 256
 257         if (cache_result) {
 258                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 259                         hw_cache_op[cache_op][0],
 260                         hw_cache_result[cache_result][0]);
 261         } else {
 262                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 263                         hw_cache_op[cache_op][1]);
 264         }
 265
 266         return name;
 267 }
 268
 269 const char *event_name(int counter)
 270 {
 271         u64 config = attrs[counter].config;
 272         int type = attrs[counter].type;
 273
 274         return __event_name(type, config);
 275 }
 276
 277 const char *__event_name(int type, u64 config)
 278 {
 279         static char buf[32];
 280
 281         if (type == PERF_TYPE_RAW) {
 282                 sprintf(buf, "raw 0x%llx", config);
 283                 return buf;
 284         }
 285
 286         switch (type) {
 287         case PERF_TYPE_HARDWARE:
 288                 if (config < PERF_COUNT_HW_MAX)
 289                         return hw_event_names[config];
 290                 return "unknown-hardware";
 291
 292         case PERF_TYPE_HW_CACHE: {
 293                 u8 cache_type, cache_op, cache_result;
 294
 295                 cache_type   = (config >>  0) & 0xff;
 296                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 297                         return "unknown-ext-hardware-cache-type";
 298
 299                 cache_op     = (config >>  8) & 0xff;
 300                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 301                         return "unknown-ext-hardware-cache-op";
 302
 303                 cache_result = (config >> 16) & 0xff;
 304                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 305                         return "unknown-ext-hardware-cache-result";
 306
 307                 if (!is_cache_op_valid(cache_type, cache_op))
 308                         return "invalid-cache";
 309
 310                 return event_cache_name(cache_type, cache_op, cache_result);
 311         }
 312
 313         case PERF_TYPE_SOFTWARE:
 314                 if (config < PERF_COUNT_SW_MAX)
 315                         return sw_event_names[config];
 316                 return "unknown-software";
 317
 318         case PERF_TYPE_TRACEPOINT:
 319                 return tracepoint_id_to_name(config);
 320
 321         default:
 322                 break;
 323         }
 324
 325         return "unknown";
 326 }
 327
 328 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 329 {
 330         int i, j;
 331         int n, longest = -1;
 332
 333         for (i = 0; i < size; i++) {
 334                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 335                         n = strlen(names[i][j]);
 336                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 337                                 longest = n;
 338                 }
 339                 if (longest > 0) {
 340                         *str += longest;
 341                         return i;
 342                 }
 343         }
 344
 345         return -1;
 346 }
 347
 348 static enum event_result
 349 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 350 {
 351         const char *s = *str;
 352         int cache_type = -1, cache_op = -1, cache_result = -1;
 353
 354         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 355         /*
 356          * No fallback - if we cannot get a clear cache type
 357          * then bail out:
 358          */
 359         if (cache_type == -1)
 360                 return EVT_FAILED;
 361
 362         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 363                 ++s;
 364
 365                 if (cache_op == -1) {
 366                         cache_op = parse_aliases(&s, hw_cache_op,
 367                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 368                         if (cache_op >= 0) {
 369                                 if (!is_cache_op_valid(cache_type, cache_op))
 370                                         return 0;
 371                                 continue;
 372                         }
 373                 }
 374
 375                 if (cache_result == -1) {
 376                         cache_result = parse_aliases(&s, hw_cache_result,
 377                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 378                         if (cache_result >= 0)
 379                                 continue;
 380                 }
 381
 382                 /*
 383                  * Can't parse this as a cache op or result, so back up
 384                  * to the '-'.
 385                  */
 386                 --s;
 387                 break;
 388         }
 389
 390         /*
 391          * Fall back to reads:
 392          */
 393         if (cache_op == -1)
 394                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 395
 396         /*
 397          * Fall back to accesses:
 398          */
 399         if (cache_result == -1)
 400                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 401
 402         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 403         attr->type = PERF_TYPE_HW_CACHE;
 404
 405         *str = s;
 406         return EVT_HANDLED;
 407 }
 408
 409 static enum event_result
 410 parse_single_tracepoint_event(char *sys_name,
 411                               const char *evt_name,
 412                               unsigned int evt_length,
 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         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 422                  sys_name, evt_name);
 423
 424         fd = open(evt_path, O_RDONLY);
 425         if (fd < 0)
 426                 return EVT_FAILED;
 427
 428         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 429                 close(fd);
 430                 return EVT_FAILED;
 431         }
 432
 433         close(fd);
 434         id = atoll(id_buf);
 435         attr->config = id;
 436         attr->type = PERF_TYPE_TRACEPOINT;
 437         *strp = evt_name + evt_length;
 438
 439         attr->sample_type |= PERF_SAMPLE_RAW;
 440         attr->sample_type |= PERF_SAMPLE_TIME;
 441         attr->sample_type |= PERF_SAMPLE_CPU;
 442
 443         attr->sample_period = 1;
 444
 445
 446         return EVT_HANDLED;
 447 }
 448
 449 /* sys + ':' + event + ':' + flags*/
 450 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 451 static enum event_result
 452 parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
 453                                 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
 471                 if (!strcmp(evt_ent->d_name, ".")
 472                     || !strcmp(evt_ent->d_name, "..")
 473                     || !strcmp(evt_ent->d_name, "enable")
 474                     || !strcmp(evt_ent->d_name, "filter"))
 475                         continue;
 476
 477                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 478                         continue;
 479
 480                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 481                                evt_ent->d_name, flags ? ":" : "",
 482                                flags ?: "");
 483                 if (len < 0)
 484                         return EVT_FAILED;
 485
 486                 if (parse_events(NULL, event_opt, 0))
 487                         return EVT_FAILED;
 488         }
 489
 490         return EVT_HANDLED_ALL;
 491 }
 492
 493
 494 static enum event_result parse_tracepoint_event(const char **strp,
 495                                     struct perf_event_attr *attr)
 496 {
 497         const char *evt_name;
 498         char *flags;
 499         char sys_name[MAX_EVENT_LENGTH];
 500         unsigned int sys_length, evt_length;
 501
 502         if (debugfs_valid_mountpoint(debugfs_path))
 503                 return 0;
 504
 505         evt_name = strchr(*strp, ':');
 506         if (!evt_name)
 507                 return EVT_FAILED;
 508
 509         sys_length = evt_name - *strp;
 510         if (sys_length >= MAX_EVENT_LENGTH)
 511                 return 0;
 512
 513         strncpy(sys_name, *strp, sys_length);
 514         sys_name[sys_length] = '\0';
 515         evt_name = evt_name + 1;
 516
 517         flags = strchr(evt_name, ':');
 518         if (flags) {
 519                 /* split it out: */
 520                 evt_name = strndup(evt_name, flags - evt_name);
 521                 flags++;
 522         }
 523
 524         evt_length = strlen(evt_name);
 525         if (evt_length >= MAX_EVENT_LENGTH)
 526                 return EVT_FAILED;
 527
 528         if (strpbrk(evt_name, "*?")) {
 529                 *strp = evt_name + evt_length;
 530                 return parse_multiple_tracepoint_event(sys_name, evt_name,
 531                                                        flags);
 532         } else
 533                 return parse_single_tracepoint_event(sys_name, evt_name,
 534                                                      evt_length, attr, strp);
 535 }
 536
 537 static enum event_result
 538 parse_breakpoint_type(const char *type, const char **strp,
 539                       struct perf_event_attr *attr)
 540 {
 541         int i;
 542
 543         for (i = 0; i < 3; i++) {
 544                 if (!type[i])
 545                         break;
 546
 547                 switch (type[i]) {
 548                 case 'r':
 549                         attr->bp_type |= HW_BREAKPOINT_R;
 550                         break;
 551                 case 'w':
 552                         attr->bp_type |= HW_BREAKPOINT_W;
 553                         break;
 554                 case 'x':
 555                         attr->bp_type |= HW_BREAKPOINT_X;
 556                         break;
 557                 default:
 558                         return EVT_FAILED;
 559                 }
 560         }
 561         if (!attr->bp_type) /* Default */
 562                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 563
 564         *strp = type + i;
 565
 566         return EVT_HANDLED;
 567 }
 568
 569 static enum event_result
 570 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 571 {
 572         const char *target;
 573         const char *type;
 574         char *endaddr;
 575         u64 addr;
 576         enum event_result err;
 577
 578         target = strchr(*strp, ':');
 579         if (!target)
 580                 return EVT_FAILED;
 581
 582         if (strncmp(*strp, "mem", target - *strp) != 0)
 583                 return EVT_FAILED;
 584
 585         target++;
 586
 587         addr = strtoull(target, &endaddr, 0);
 588         if (target == endaddr)
 589                 return EVT_FAILED;
 590
 591         attr->bp_addr = addr;
 592         *strp = endaddr;
 593
 594         type = strchr(target, ':');
 595
 596         /* If no type is defined, just rw as default */
 597         if (!type) {
 598                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 599         } else {
 600                 err = parse_breakpoint_type(++type, strp, attr);
 601                 if (err == EVT_FAILED)
 602                         return EVT_FAILED;
 603         }
 604
 605         /*
 606          * We should find a nice way to override the access length
 607          * Provide some defaults for now
 608          */
 609         if (attr->bp_type == HW_BREAKPOINT_X)
 610                 attr->bp_len = sizeof(long);
 611         else
 612                 attr->bp_len = HW_BREAKPOINT_LEN_4;
 613
 614         attr->type = PERF_TYPE_BREAKPOINT;
 615
 616         return EVT_HANDLED;
 617 }
 618
 619 static int check_events(const char *str, unsigned int i)
 620 {
 621         int n;
 622
 623         n = strlen(event_symbols[i].symbol);
 624         if (!strncmp(str, event_symbols[i].symbol, n))
 625                 return n;
 626
 627         n = strlen(event_symbols[i].alias);
 628         if (n)
 629                 if (!strncmp(str, event_symbols[i].alias, n))
 630                         return n;
 631         return 0;
 632 }
 633
 634 static enum event_result
 635 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 636 {
 637         const char *str = *strp;
 638         unsigned int i;
 639         int n;
 640
 641         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 642                 n = check_events(str, i);
 643                 if (n > 0) {
 644                         attr->type = event_symbols[i].type;
 645                         attr->config = event_symbols[i].config;
 646                         *strp = str + n;
 647                         return EVT_HANDLED;
 648                 }
 649         }
 650         return EVT_FAILED;
 651 }
 652
 653 static enum event_result
 654 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 655 {
 656         const char *str = *strp;
 657         u64 config;
 658         int n;
 659
 660         if (*str != 'r')
 661                 return EVT_FAILED;
 662         n = hex2u64(str + 1, &config);
 663         if (n > 0) {
 664                 *strp = str + n + 1;
 665                 attr->type = PERF_TYPE_RAW;
 666                 attr->config = config;
 667                 return EVT_HANDLED;
 668         }
 669         return EVT_FAILED;
 670 }
 671
 672 static enum event_result
 673 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 674 {
 675         const char *str = *strp;
 676         char *endp;
 677         unsigned long type;
 678         u64 config;
 679
 680         type = strtoul(str, &endp, 0);
 681         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 682                 str = endp + 1;
 683                 config = strtoul(str, &endp, 0);
 684                 if (endp > str) {
 685                         attr->type = type;
 686                         attr->config = config;
 687                         *strp = endp;
 688                         return EVT_HANDLED;
 689                 }
 690         }
 691         return EVT_FAILED;
 692 }
 693
 694 static enum event_result
 695 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 696 {
 697         const char *str = *strp;
 698         int exclude = 0;
 699         int eu = 0, ek = 0, eh = 0, precise = 0;
 700
 701         if (*str++ != ':')
 702                 return 0;
 703         while (*str) {
 704                 if (*str == 'u') {
 705                         if (!exclude)
 706                                 exclude = eu = ek = eh = 1;
 707                         eu = 0;
 708                 } else if (*str == 'k') {
 709                         if (!exclude)
 710                                 exclude = eu = ek = eh = 1;
 711                         ek = 0;
 712                 } else if (*str == 'h') {
 713                         if (!exclude)
 714                                 exclude = eu = ek = eh = 1;
 715                         eh = 0;
 716                 } else if (*str == 'p') {
 717                         precise++;
 718                 } else
 719                         break;
 720
 721                 ++str;
 722         }
 723         if (str >= *strp + 2) {
 724                 *strp = str;
 725                 attr->exclude_user   = eu;
 726                 attr->exclude_kernel = ek;
 727                 attr->exclude_hv     = eh;
 728                 attr->precise_ip     = precise;
 729                 return 1;
 730         }
 731         return 0;
 732 }
 733
 734 /*
 735  * Each event can have multiple symbolic names.
 736  * Symbolic names are (almost) exactly matched.
 737  */
 738 static enum event_result
 739 parse_event_symbols(const char **str, struct perf_event_attr *attr)
 740 {
 741         enum event_result ret;
 742
 743         ret = parse_tracepoint_event(str, attr);
 744         if (ret != EVT_FAILED)
 745                 goto modifier;
 746
 747         ret = parse_raw_event(str, attr);
 748         if (ret != EVT_FAILED)
 749                 goto modifier;
 750
 751         ret = parse_numeric_event(str, attr);
 752         if (ret != EVT_FAILED)
 753                 goto modifier;
 754
 755         ret = parse_symbolic_event(str, attr);
 756         if (ret != EVT_FAILED)
 757                 goto modifier;
 758
 759         ret = parse_generic_hw_event(str, attr);
 760         if (ret != EVT_FAILED)
 761                 goto modifier;
 762
 763         ret = parse_breakpoint_event(str, attr);
 764         if (ret != EVT_FAILED)
 765                 goto modifier;
 766
 767         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 768         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 769         return EVT_FAILED;
 770
 771 modifier:
 772         parse_event_modifier(str, attr);
 773
 774         return ret;
 775 }
 776
 777 static int store_event_type(const char *orgname)
 778 {
 779         char filename[PATH_MAX], *c;
 780         FILE *file;
 781         int id, n;
 782
 783         sprintf(filename, "%s/", debugfs_path);
 784         strncat(filename, orgname, strlen(orgname));
 785         strcat(filename, "/id");
 786
 787         c = strchr(filename, ':');
 788         if (c)
 789                 *c = '/';
 790
 791         file = fopen(filename, "r");
 792         if (!file)
 793                 return 0;
 794         n = fscanf(file, "%i", &id);
 795         fclose(file);
 796         if (n < 1) {
 797                 pr_err("cannot store event ID\n");
 798                 return -EINVAL;
 799         }
 800         return perf_header__push_event(id, orgname);
 801 }
 802
 803 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 804 {
 805         struct perf_event_attr attr;
 806         enum event_result ret;
 807
 808         if (strchr(str, ':'))
 809                 if (store_event_type(str) < 0)
 810                         return -1;
 811
 812         for (;;) {
 813                 if (nr_counters == MAX_COUNTERS)
 814                         return -1;
 815
 816                 memset(&attr, 0, sizeof(attr));
 817                 ret = parse_event_symbols(&str, &attr);
 818                 if (ret == EVT_FAILED)
 819                         return -1;
 820
 821                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 822                         return -1;
 823
 824                 if (ret != EVT_HANDLED_ALL) {
 825                         attrs[nr_counters] = attr;
 826                         nr_counters++;
 827                 }
 828
 829                 if (*str == 0)
 830                         break;
 831                 if (*str == ',')
 832                         ++str;
 833                 while (isspace(*str))
 834                         ++str;
 835         }
 836
 837         return 0;
 838 }
 839
 840 int parse_filter(const struct option *opt __used, const char *str,
 841                  int unset __used)
 842 {
 843         int i = nr_counters - 1;
 844         int len = strlen(str);
 845
 846         if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
 847                 fprintf(stderr,
 848                         "-F option should follow a -e tracepoint option\n");
 849                 return -1;
 850         }
 851
 852         filters[i] = malloc(len + 1);
 853         if (!filters[i]) {
 854                 fprintf(stderr, "not enough memory to hold filter string\n");
 855                 return -1;
 856         }
 857         strcpy(filters[i], str);
 858
 859         return 0;
 860 }
 861
 862 static const char * const event_type_descriptors[] = {
 863         "Hardware event",
 864         "Software event",
 865         "Tracepoint event",
 866         "Hardware cache event",
 867         "Raw hardware event descriptor",
 868         "Hardware breakpoint",
 869 };
 870
 871 /*
 872  * Print the events from <debugfs_mount_point>/tracing/events
 873  */
 874
 875 static void print_tracepoint_events(void)
 876 {
 877         DIR *sys_dir, *evt_dir;
 878         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 879         char evt_path[MAXPATHLEN];
 880         char dir_path[MAXPATHLEN];
 881
 882         if (debugfs_valid_mountpoint(debugfs_path))
 883                 return;
 884
 885         sys_dir = opendir(debugfs_path);
 886         if (!sys_dir)
 887                 return;
 888
 889         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 890
 891                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 892                          sys_dirent.d_name);
 893                 evt_dir = opendir(dir_path);
 894                 if (!evt_dir)
 895                         continue;
 896
 897                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 898                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 899                                  sys_dirent.d_name, evt_dirent.d_name);
 900                         printf("  %-42s [%s]\n", evt_path,
 901                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 902                 }
 903                 closedir(evt_dir);
 904         }
 905         closedir(sys_dir);
 906 }
 907
 908 /*
 909  * Print the help text for the event symbols:
 910  */
 911 void print_events(void)
 912 {
 913         struct event_symbol *syms = event_symbols;
 914         unsigned int i, type, op, prev_type = -1;
 915         char name[40];
 916
 917         printf("\n");
 918         printf("List of pre-defined events (to be used in -e):\n");
 919
 920         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 921                 type = syms->type;
 922
 923                 if (type != prev_type)
 924                         printf("\n");
 925
 926                 if (strlen(syms->alias))
 927                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
 928                 else
 929                         strcpy(name, syms->symbol);
 930                 printf("  %-42s [%s]\n", name,
 931                         event_type_descriptors[type]);
 932
 933                 prev_type = type;
 934         }
 935
 936         printf("\n");
 937         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 938                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 939                         /* skip invalid cache type */
 940                         if (!is_cache_op_valid(type, op))
 941                                 continue;
 942
 943                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 944                                 printf("  %-42s [%s]\n",
 945                                         event_cache_name(type, op, i),
 946                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
 947                         }
 948                 }
 949         }
 950
 951         printf("\n");
 952         printf("  %-42s [%s]\n",
 953                 "rNNN (see 'perf list --help' on how to encode it)",
 954                event_type_descriptors[PERF_TYPE_RAW]);
 955         printf("\n");
 956
 957         printf("  %-42s [%s]\n",
 958                         "mem:<addr>[:access]",
 959                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
 960         printf("\n");
 961
 962         print_tracepoint_events();
 963
 964         exit(129);
 965 }