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(STALLED_CYCLES_FRONTEND),       "stalled-cycles-frontend",      "idle-cycles-frontend"  },
  36   { CHW(STALLED_CYCLES_BACKEND),        "stalled-cycles-backend",       "idle-cycles-backend"   },
  37   { CHW(INSTRUCTIONS),                  "instructions",                 ""                      },
  38   { CHW(CACHE_REFERENCES),              "cache-references",             ""                      },
  39   { CHW(CACHE_MISSES),                  "cache-misses",                 ""                      },
  40   { CHW(BRANCH_INSTRUCTIONS),           "branch-instructions",          "branches"              },
  41   { CHW(BRANCH_MISSES),                 "branch-misses",                ""                      },
  42   { CHW(BUS_CYCLES),                    "bus-cycles",                   ""                      },
  43
  44   { CSW(CPU_CLOCK),                     "cpu-clock",                    ""                      },
  45   { CSW(TASK_CLOCK),                    "task-clock",                   ""                      },
  46   { CSW(PAGE_FAULTS),                   "page-faults",                  "faults"                },
  47   { CSW(PAGE_FAULTS_MIN),               "minor-faults",                 ""                      },
  48   { CSW(PAGE_FAULTS_MAJ),               "major-faults",                 ""                      },
  49   { CSW(CONTEXT_SWITCHES),              "context-switches",             "cs"                    },
  50   { CSW(CPU_MIGRATIONS),                "cpu-migrations",               "migrations"            },
  51   { CSW(ALIGNMENT_FAULTS),              "alignment-faults",             ""                      },
  52   { CSW(EMULATION_FAULTS),              "emulation-faults",             ""                      },
  53 };
  54
  55 #define __PERF_EVENT_FIELD(config, name) \
  56         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  57
  58 #define PERF_EVENT_RAW(config)          __PERF_EVENT_FIELD(config, RAW)
  59 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
  60 #define PERF_EVENT_TYPE(config)         __PERF_EVENT_FIELD(config, TYPE)
  61 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
  62
  63 static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
  64         "cycles",
  65         "instructions",
  66         "cache-references",
  67         "cache-misses",
  68         "branches",
  69         "branch-misses",
  70         "bus-cycles",
  71         "stalled-cycles-frontend",
  72         "stalled-cycles-backend",
  73 };
  74
  75 static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
  76         "cpu-clock",
  77         "task-clock",
  78         "page-faults",
  79         "context-switches",
  80         "CPU-migrations",
  81         "minor-faults",
  82         "major-faults",
  83         "alignment-faults",
  84         "emulation-faults",
  85 };
  86
  87 #define MAX_ALIASES 8
  88
  89 static const char *hw_cache[][MAX_ALIASES] = {
  90  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  91  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  92  { "LLC",       "L2"                                                    },
  93  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  94  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  95  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  96 };
  97
  98 static const char *hw_cache_op[][MAX_ALIASES] = {
  99  { "load",      "loads",        "read",                                 },
 100  { "store",     "stores",       "write",                                },
 101  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
 102 };
 103
 104 static const char *hw_cache_result[][MAX_ALIASES] = {
 105  { "refs",      "Reference",    "ops",          "access",               },
 106  { "misses",    "miss",                                                 },
 107 };
 108
 109 #define C(x)            PERF_COUNT_HW_CACHE_##x
 110 #define CACHE_READ      (1 << C(OP_READ))
 111 #define CACHE_WRITE     (1 << C(OP_WRITE))
 112 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 113 #define COP(x)          (1 << x)
 114
 115 /*
 116  * cache operartion stat
 117  * L1I : Read and prefetch only
 118  * ITLB and BPU : Read-only
 119  */
 120 static unsigned long hw_cache_stat[C(MAX)] = {
 121  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 122  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 123  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 124  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 125  [C(ITLB)]      = (CACHE_READ),
 126  [C(BPU)]       = (CACHE_READ),
 127 };
 128
 129 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 130         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 131         if (sys_dirent.d_type == DT_DIR &&                                     \
 132            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 133            (strcmp(sys_dirent.d_name, "..")))
 134
 135 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 136 {
 137         char evt_path[MAXPATHLEN];
 138         int fd;
 139
 140         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 141                         sys_dir->d_name, evt_dir->d_name);
 142         fd = open(evt_path, O_RDONLY);
 143         if (fd < 0)
 144                 return -EINVAL;
 145         close(fd);
 146
 147         return 0;
 148 }
 149
 150 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 151         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 152         if (evt_dirent.d_type == DT_DIR &&                                     \
 153            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 154            (strcmp(evt_dirent.d_name, "..")) &&                                \
 155            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 156
 157 #define MAX_EVENT_LENGTH 512
 158
 159
 160 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 161 {
 162         struct tracepoint_path *path = NULL;
 163         DIR *sys_dir, *evt_dir;
 164         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 165         char id_buf[4];
 166         int fd;
 167         u64 id;
 168         char evt_path[MAXPATHLEN];
 169         char dir_path[MAXPATHLEN];
 170
 171         if (debugfs_valid_mountpoint(debugfs_path))
 172                 return NULL;
 173
 174         sys_dir = opendir(debugfs_path);
 175         if (!sys_dir)
 176                 return NULL;
 177
 178         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 179
 180                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 181                          sys_dirent.d_name);
 182                 evt_dir = opendir(dir_path);
 183                 if (!evt_dir)
 184                         continue;
 185
 186                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 187
 188                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 189                                  evt_dirent.d_name);
 190                         fd = open(evt_path, O_RDONLY);
 191                         if (fd < 0)
 192                                 continue;
 193                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 194                                 close(fd);
 195                                 continue;
 196                         }
 197                         close(fd);
 198                         id = atoll(id_buf);
 199                         if (id == config) {
 200                                 closedir(evt_dir);
 201                                 closedir(sys_dir);
 202                                 path = zalloc(sizeof(*path));
 203                                 path->system = malloc(MAX_EVENT_LENGTH);
 204                                 if (!path->system) {
 205                                         free(path);
 206                                         return NULL;
 207                                 }
 208                                 path->name = malloc(MAX_EVENT_LENGTH);
 209                                 if (!path->name) {
 210                                         free(path->system);
 211                                         free(path);
 212                                         return NULL;
 213                                 }
 214                                 strncpy(path->system, sys_dirent.d_name,
 215                                         MAX_EVENT_LENGTH);
 216                                 strncpy(path->name, evt_dirent.d_name,
 217                                         MAX_EVENT_LENGTH);
 218                                 return path;
 219                         }
 220                 }
 221                 closedir(evt_dir);
 222         }
 223
 224         closedir(sys_dir);
 225         return NULL;
 226 }
 227
 228 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 229 static const char *tracepoint_id_to_name(u64 config)
 230 {
 231         static char buf[TP_PATH_LEN];
 232         struct tracepoint_path *path;
 233
 234         path = tracepoint_id_to_path(config);
 235         if (path) {
 236                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 237                 free(path->name);
 238                 free(path->system);
 239                 free(path);
 240         } else
 241                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 242
 243         return buf;
 244 }
 245
 246 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 247 {
 248         if (hw_cache_stat[cache_type] & COP(cache_op))
 249                 return 1;       /* valid */
 250         else
 251                 return 0;       /* invalid */
 252 }
 253
 254 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 255 {
 256         static char name[50];
 257
 258         if (cache_result) {
 259                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 260                         hw_cache_op[cache_op][0],
 261                         hw_cache_result[cache_result][0]);
 262         } else {
 263                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 264                         hw_cache_op[cache_op][1]);
 265         }
 266
 267         return name;
 268 }
 269
 270 const char *event_type(int type)
 271 {
 272         switch (type) {
 273         case PERF_TYPE_HARDWARE:
 274                 return "hardware";
 275
 276         case PERF_TYPE_SOFTWARE:
 277                 return "software";
 278
 279         case PERF_TYPE_TRACEPOINT:
 280                 return "tracepoint";
 281
 282         case PERF_TYPE_HW_CACHE:
 283                 return "hardware-cache";
 284
 285         default:
 286                 break;
 287         }
 288
 289         return "unknown";
 290 }
 291
 292 const char *event_name(struct perf_evsel *evsel)
 293 {
 294         u64 config = evsel->attr.config;
 295         int type = evsel->attr.type;
 296
 297         if (evsel->name)
 298                 return evsel->name;
 299
 300         return __event_name(type, config);
 301 }
 302
 303 const char *__event_name(int type, u64 config)
 304 {
 305         static char buf[32];
 306
 307         if (type == PERF_TYPE_RAW) {
 308                 sprintf(buf, "raw 0x%" PRIx64, config);
 309                 return buf;
 310         }
 311
 312         switch (type) {
 313         case PERF_TYPE_HARDWARE:
 314                 if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
 315                         return hw_event_names[config];
 316                 return "unknown-hardware";
 317
 318         case PERF_TYPE_HW_CACHE: {
 319                 u8 cache_type, cache_op, cache_result;
 320
 321                 cache_type   = (config >>  0) & 0xff;
 322                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 323                         return "unknown-ext-hardware-cache-type";
 324
 325                 cache_op     = (config >>  8) & 0xff;
 326                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 327                         return "unknown-ext-hardware-cache-op";
 328
 329                 cache_result = (config >> 16) & 0xff;
 330                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 331                         return "unknown-ext-hardware-cache-result";
 332
 333                 if (!is_cache_op_valid(cache_type, cache_op))
 334                         return "invalid-cache";
 335
 336                 return event_cache_name(cache_type, cache_op, cache_result);
 337         }
 338
 339         case PERF_TYPE_SOFTWARE:
 340                 if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
 341                         return sw_event_names[config];
 342                 return "unknown-software";
 343
 344         case PERF_TYPE_TRACEPOINT:
 345                 return tracepoint_id_to_name(config);
 346
 347         default:
 348                 break;
 349         }
 350
 351         return "unknown";
 352 }
 353
 354 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 355 {
 356         int i, j;
 357         int n, longest = -1;
 358
 359         for (i = 0; i < size; i++) {
 360                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 361                         n = strlen(names[i][j]);
 362                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 363                                 longest = n;
 364                 }
 365                 if (longest > 0) {
 366                         *str += longest;
 367                         return i;
 368                 }
 369         }
 370
 371         return -1;
 372 }
 373
 374 static enum event_result
 375 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 376 {
 377         const char *s = *str;
 378         int cache_type = -1, cache_op = -1, cache_result = -1;
 379
 380         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 381         /*
 382          * No fallback - if we cannot get a clear cache type
 383          * then bail out:
 384          */
 385         if (cache_type == -1)
 386                 return EVT_FAILED;
 387
 388         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 389                 ++s;
 390
 391                 if (cache_op == -1) {
 392                         cache_op = parse_aliases(&s, hw_cache_op,
 393                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 394                         if (cache_op >= 0) {
 395                                 if (!is_cache_op_valid(cache_type, cache_op))
 396                                         return 0;
 397                                 continue;
 398                         }
 399                 }
 400
 401                 if (cache_result == -1) {
 402                         cache_result = parse_aliases(&s, hw_cache_result,
 403                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 404                         if (cache_result >= 0)
 405                                 continue;
 406                 }
 407
 408                 /*
 409                  * Can't parse this as a cache op or result, so back up
 410                  * to the '-'.
 411                  */
 412                 --s;
 413                 break;
 414         }
 415
 416         /*
 417          * Fall back to reads:
 418          */
 419         if (cache_op == -1)
 420                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 421
 422         /*
 423          * Fall back to accesses:
 424          */
 425         if (cache_result == -1)
 426                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 427
 428         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 429         attr->type = PERF_TYPE_HW_CACHE;
 430
 431         *str = s;
 432         return EVT_HANDLED;
 433 }
 434
 435 static enum event_result
 436 parse_single_tracepoint_event(char *sys_name,
 437                               const char *evt_name,
 438                               unsigned int evt_length,
 439                               struct perf_event_attr *attr,
 440                               const char **strp)
 441 {
 442         char evt_path[MAXPATHLEN];
 443         char id_buf[4];
 444         u64 id;
 445         int fd;
 446
 447         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 448                  sys_name, evt_name);
 449
 450         fd = open(evt_path, O_RDONLY);
 451         if (fd < 0)
 452                 return EVT_FAILED;
 453
 454         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 455                 close(fd);
 456                 return EVT_FAILED;
 457         }
 458
 459         close(fd);
 460         id = atoll(id_buf);
 461         attr->config = id;
 462         attr->type = PERF_TYPE_TRACEPOINT;
 463         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 464
 465         attr->sample_type |= PERF_SAMPLE_RAW;
 466         attr->sample_type |= PERF_SAMPLE_TIME;
 467         attr->sample_type |= PERF_SAMPLE_CPU;
 468
 469         attr->sample_period = 1;
 470
 471
 472         return EVT_HANDLED;
 473 }
 474
 475 /* sys + ':' + event + ':' + flags*/
 476 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 477 static enum event_result
 478 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
 479                                 const char *evt_exp, char *flags)
 480 {
 481         char evt_path[MAXPATHLEN];
 482         struct dirent *evt_ent;
 483         DIR *evt_dir;
 484
 485         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 486         evt_dir = opendir(evt_path);
 487
 488         if (!evt_dir) {
 489                 perror("Can't open event dir");
 490                 return EVT_FAILED;
 491         }
 492
 493         while ((evt_ent = readdir(evt_dir))) {
 494                 char event_opt[MAX_EVOPT_LEN + 1];
 495                 int len;
 496
 497                 if (!strcmp(evt_ent->d_name, ".")
 498                     || !strcmp(evt_ent->d_name, "..")
 499                     || !strcmp(evt_ent->d_name, "enable")
 500                     || !strcmp(evt_ent->d_name, "filter"))
 501                         continue;
 502
 503                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 504                         continue;
 505
 506                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 507                                evt_ent->d_name, flags ? ":" : "",
 508                                flags ?: "");
 509                 if (len < 0)
 510                         return EVT_FAILED;
 511
 512                 if (parse_events(opt, event_opt, 0))
 513                         return EVT_FAILED;
 514         }
 515
 516         return EVT_HANDLED_ALL;
 517 }
 518
 519 static enum event_result
 520 parse_tracepoint_event(const struct option *opt, const char **strp,
 521                        struct perf_event_attr *attr)
 522 {
 523         const char *evt_name;
 524         char *flags = NULL, *comma_loc;
 525         char sys_name[MAX_EVENT_LENGTH];
 526         unsigned int sys_length, evt_length;
 527
 528         if (debugfs_valid_mountpoint(debugfs_path))
 529                 return 0;
 530
 531         evt_name = strchr(*strp, ':');
 532         if (!evt_name)
 533                 return EVT_FAILED;
 534
 535         sys_length = evt_name - *strp;
 536         if (sys_length >= MAX_EVENT_LENGTH)
 537                 return 0;
 538
 539         strncpy(sys_name, *strp, sys_length);
 540         sys_name[sys_length] = '\0';
 541         evt_name = evt_name + 1;
 542
 543         comma_loc = strchr(evt_name, ',');
 544         if (comma_loc) {
 545                 /* take the event name up to the comma */
 546                 evt_name = strndup(evt_name, comma_loc - evt_name);
 547         }
 548         flags = strchr(evt_name, ':');
 549         if (flags) {
 550                 /* split it out: */
 551                 evt_name = strndup(evt_name, flags - evt_name);
 552                 flags++;
 553         }
 554
 555         evt_length = strlen(evt_name);
 556         if (evt_length >= MAX_EVENT_LENGTH)
 557                 return EVT_FAILED;
 558         if (strpbrk(evt_name, "*?")) {
 559                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
 560                 return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
 561                                                        flags);
 562         } else {
 563                 return parse_single_tracepoint_event(sys_name, evt_name,
 564                                                      evt_length, attr, strp);
 565         }
 566 }
 567
 568 static enum event_result
 569 parse_breakpoint_type(const char *type, const char **strp,
 570                       struct perf_event_attr *attr)
 571 {
 572         int i;
 573
 574         for (i = 0; i < 3; i++) {
 575                 if (!type[i])
 576                         break;
 577
 578                 switch (type[i]) {
 579                 case 'r':
 580                         attr->bp_type |= HW_BREAKPOINT_R;
 581                         break;
 582                 case 'w':
 583                         attr->bp_type |= HW_BREAKPOINT_W;
 584                         break;
 585                 case 'x':
 586                         attr->bp_type |= HW_BREAKPOINT_X;
 587                         break;
 588                 default:
 589                         return EVT_FAILED;
 590                 }
 591         }
 592         if (!attr->bp_type) /* Default */
 593                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 594
 595         *strp = type + i;
 596
 597         return EVT_HANDLED;
 598 }
 599
 600 static enum event_result
 601 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 602 {
 603         const char *target;
 604         const char *type;
 605         char *endaddr;
 606         u64 addr;
 607         enum event_result err;
 608
 609         target = strchr(*strp, ':');
 610         if (!target)
 611                 return EVT_FAILED;
 612
 613         if (strncmp(*strp, "mem", target - *strp) != 0)
 614                 return EVT_FAILED;
 615
 616         target++;
 617
 618         addr = strtoull(target, &endaddr, 0);
 619         if (target == endaddr)
 620                 return EVT_FAILED;
 621
 622         attr->bp_addr = addr;
 623         *strp = endaddr;
 624
 625         type = strchr(target, ':');
 626
 627         /* If no type is defined, just rw as default */
 628         if (!type) {
 629                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 630         } else {
 631                 err = parse_breakpoint_type(++type, strp, attr);
 632                 if (err == EVT_FAILED)
 633                         return EVT_FAILED;
 634         }
 635
 636         /*
 637          * We should find a nice way to override the access length
 638          * Provide some defaults for now
 639          */
 640         if (attr->bp_type == HW_BREAKPOINT_X)
 641                 attr->bp_len = sizeof(long);
 642         else
 643                 attr->bp_len = HW_BREAKPOINT_LEN_4;
 644
 645         attr->type = PERF_TYPE_BREAKPOINT;
 646
 647         return EVT_HANDLED;
 648 }
 649
 650 static int check_events(const char *str, unsigned int i)
 651 {
 652         int n;
 653
 654         n = strlen(event_symbols[i].symbol);
 655         if (!strncasecmp(str, event_symbols[i].symbol, n))
 656                 return n;
 657
 658         n = strlen(event_symbols[i].alias);
 659         if (n) {
 660                 if (!strncasecmp(str, event_symbols[i].alias, n))
 661                         return n;
 662         }
 663
 664         return 0;
 665 }
 666
 667 static enum event_result
 668 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 669 {
 670         const char *str = *strp;
 671         unsigned int i;
 672         int n;
 673
 674         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 675                 n = check_events(str, i);
 676                 if (n > 0) {
 677                         attr->type = event_symbols[i].type;
 678                         attr->config = event_symbols[i].config;
 679                         *strp = str + n;
 680                         return EVT_HANDLED;
 681                 }
 682         }
 683         return EVT_FAILED;
 684 }
 685
 686 static enum event_result
 687 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 688 {
 689         const char *str = *strp;
 690         u64 config;
 691         int n;
 692
 693         if (*str != 'r')
 694                 return EVT_FAILED;
 695         n = hex2u64(str + 1, &config);
 696         if (n > 0) {
 697                 *strp = str + n + 1;
 698                 attr->type = PERF_TYPE_RAW;
 699                 attr->config = config;
 700                 return EVT_HANDLED;
 701         }
 702         return EVT_FAILED;
 703 }
 704
 705 static enum event_result
 706 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 707 {
 708         const char *str = *strp;
 709         char *endp;
 710         unsigned long type;
 711         u64 config;
 712
 713         type = strtoul(str, &endp, 0);
 714         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 715                 str = endp + 1;
 716                 config = strtoul(str, &endp, 0);
 717                 if (endp > str) {
 718                         attr->type = type;
 719                         attr->config = config;
 720                         *strp = endp;
 721                         return EVT_HANDLED;
 722                 }
 723         }
 724         return EVT_FAILED;
 725 }
 726
 727 static int
 728 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 729 {
 730         const char *str = *strp;
 731         int exclude = 0;
 732         int eu = 0, ek = 0, eh = 0, precise = 0;
 733
 734         if (!*str)
 735                 return 0;
 736
 737         if (*str == ',')
 738                 return 0;
 739
 740         if (*str++ != ':')
 741                 return -1;
 742
 743         while (*str) {
 744                 if (*str == 'u') {
 745                         if (!exclude)
 746                                 exclude = eu = ek = eh = 1;
 747                         eu = 0;
 748                 } else if (*str == 'k') {
 749                         if (!exclude)
 750                                 exclude = eu = ek = eh = 1;
 751                         ek = 0;
 752                 } else if (*str == 'h') {
 753                         if (!exclude)
 754                                 exclude = eu = ek = eh = 1;
 755                         eh = 0;
 756                 } else if (*str == 'p') {
 757                         precise++;
 758                 } else
 759                         break;
 760
 761                 ++str;
 762         }
 763         if (str < *strp + 2)
 764                 return -1;
 765
 766         *strp = str;
 767
 768         attr->exclude_user   = eu;
 769         attr->exclude_kernel = ek;
 770         attr->exclude_hv     = eh;
 771         attr->precise_ip     = precise;
 772
 773         return 0;
 774 }
 775
 776 /*
 777  * Each event can have multiple symbolic names.
 778  * Symbolic names are (almost) exactly matched.
 779  */
 780 static enum event_result
 781 parse_event_symbols(const struct option *opt, const char **str,
 782                     struct perf_event_attr *attr)
 783 {
 784         enum event_result ret;
 785
 786         ret = parse_tracepoint_event(opt, str, attr);
 787         if (ret != EVT_FAILED)
 788                 goto modifier;
 789
 790         ret = parse_raw_event(str, attr);
 791         if (ret != EVT_FAILED)
 792                 goto modifier;
 793
 794         ret = parse_numeric_event(str, attr);
 795         if (ret != EVT_FAILED)
 796                 goto modifier;
 797
 798         ret = parse_symbolic_event(str, attr);
 799         if (ret != EVT_FAILED)
 800                 goto modifier;
 801
 802         ret = parse_generic_hw_event(str, attr);
 803         if (ret != EVT_FAILED)
 804                 goto modifier;
 805
 806         ret = parse_breakpoint_event(str, attr);
 807         if (ret != EVT_FAILED)
 808                 goto modifier;
 809
 810         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 811         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 812         return EVT_FAILED;
 813
 814 modifier:
 815         if (parse_event_modifier(str, attr) < 0) {
 816                 fprintf(stderr, "invalid event modifier: '%s'\n", *str);
 817                 fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
 818
 819                 return EVT_FAILED;
 820         }
 821
 822         return ret;
 823 }
 824
 825 int parse_events(const struct option *opt, const char *str, int unset __used)
 826 {
 827         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 828         struct perf_event_attr attr;
 829         enum event_result ret;
 830         const char *ostr;
 831
 832         for (;;) {
 833                 ostr = str;
 834                 memset(&attr, 0, sizeof(attr));
 835                 ret = parse_event_symbols(opt, &str, &attr);
 836                 if (ret == EVT_FAILED)
 837                         return -1;
 838
 839                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 840                         return -1;
 841
 842                 if (ret != EVT_HANDLED_ALL) {
 843                         struct perf_evsel *evsel;
 844                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
 845                         if (evsel == NULL)
 846                                 return -1;
 847                         perf_evlist__add(evlist, evsel);
 848
 849                         evsel->name = calloc(str - ostr + 1, 1);
 850                         if (!evsel->name)
 851                                 return -1;
 852                         strncpy(evsel->name, ostr, str - ostr);
 853                 }
 854
 855                 if (*str == 0)
 856                         break;
 857                 if (*str == ',')
 858                         ++str;
 859                 while (isspace(*str))
 860                         ++str;
 861         }
 862
 863         return 0;
 864 }
 865
 866 int parse_filter(const struct option *opt, const char *str,
 867                  int unset __used)
 868 {
 869         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 870         struct perf_evsel *last = NULL;
 871
 872         if (evlist->nr_entries > 0)
 873                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 874
 875         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 876                 fprintf(stderr,
 877                         "-F option should follow a -e tracepoint option\n");
 878                 return -1;
 879         }
 880
 881         last->filter = strdup(str);
 882         if (last->filter == NULL) {
 883                 fprintf(stderr, "not enough memory to hold filter string\n");
 884                 return -1;
 885         }
 886
 887         return 0;
 888 }
 889
 890 static const char * const event_type_descriptors[] = {
 891         "Hardware event",
 892         "Software event",
 893         "Tracepoint event",
 894         "Hardware cache event",
 895         "Raw hardware event descriptor",
 896         "Hardware breakpoint",
 897 };
 898
 899 /*
 900  * Print the events from <debugfs_mount_point>/tracing/events
 901  */
 902
 903 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 904 {
 905         DIR *sys_dir, *evt_dir;
 906         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 907         char evt_path[MAXPATHLEN];
 908         char dir_path[MAXPATHLEN];
 909
 910         if (debugfs_valid_mountpoint(debugfs_path))
 911                 return;
 912
 913         sys_dir = opendir(debugfs_path);
 914         if (!sys_dir)
 915                 return;
 916
 917         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 918                 if (subsys_glob != NULL &&
 919                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 920                         continue;
 921
 922                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 923                          sys_dirent.d_name);
 924                 evt_dir = opendir(dir_path);
 925                 if (!evt_dir)
 926                         continue;
 927
 928                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 929                         if (event_glob != NULL &&
 930                             !strglobmatch(evt_dirent.d_name, event_glob))
 931                                 continue;
 932
 933                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 934                                  sys_dirent.d_name, evt_dirent.d_name);
 935                         printf("  %-50s [%s]\n", evt_path,
 936                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 937                 }
 938                 closedir(evt_dir);
 939         }
 940         closedir(sys_dir);
 941 }
 942
 943 /*
 944  * Check whether event is in <debugfs_mount_point>/tracing/events
 945  */
 946
 947 int is_valid_tracepoint(const char *event_string)
 948 {
 949         DIR *sys_dir, *evt_dir;
 950         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 951         char evt_path[MAXPATHLEN];
 952         char dir_path[MAXPATHLEN];
 953
 954         if (debugfs_valid_mountpoint(debugfs_path))
 955                 return 0;
 956
 957         sys_dir = opendir(debugfs_path);
 958         if (!sys_dir)
 959                 return 0;
 960
 961         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 962
 963                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 964                          sys_dirent.d_name);
 965                 evt_dir = opendir(dir_path);
 966                 if (!evt_dir)
 967                         continue;
 968
 969                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 970                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 971                                  sys_dirent.d_name, evt_dirent.d_name);
 972                         if (!strcmp(evt_path, event_string)) {
 973                                 closedir(evt_dir);
 974                                 closedir(sys_dir);
 975                                 return 1;
 976                         }
 977                 }
 978                 closedir(evt_dir);
 979         }
 980         closedir(sys_dir);
 981         return 0;
 982 }
 983
 984 void print_events_type(u8 type)
 985 {
 986         struct event_symbol *syms = event_symbols;
 987         unsigned int i;
 988         char name[64];
 989
 990         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 991                 if (type != syms->type)
 992                         continue;
 993
 994                 if (strlen(syms->alias))
 995                         snprintf(name, sizeof(name),  "%s OR %s",
 996                                  syms->symbol, syms->alias);
 997                 else
 998                         snprintf(name, sizeof(name), "%s", syms->symbol);
 999
1000                 printf("  %-50s [%s]\n", name,
1001                         event_type_descriptors[type]);
1002         }
1003 }
1004
1005 int print_hwcache_events(const char *event_glob)
1006 {
1007         unsigned int type, op, i, printed = 0;
1008
1009         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1010                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1011                         /* skip invalid cache type */
1012                         if (!is_cache_op_valid(type, op))
1013                                 continue;
1014
1015                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1016                                 char *name = event_cache_name(type, op, i);
1017
1018                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1019                                         continue;
1020
1021                                 printf("  %-50s [%s]\n", name,
1022                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
1023                                 ++printed;
1024                         }
1025                 }
1026         }
1027
1028         return printed;
1029 }
1030
1031 #define MAX_NAME_LEN 100
1032
1033 /*
1034  * Print the help text for the event symbols:
1035  */
1036 void print_events(const char *event_glob)
1037 {
1038         unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1039         struct event_symbol *syms = event_symbols;
1040         char name[MAX_NAME_LEN];
1041
1042         printf("\n");
1043         printf("List of pre-defined events (to be used in -e):\n");
1044
1045         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1046                 type = syms->type;
1047
1048                 if (type != prev_type && printed) {
1049                         printf("\n");
1050                         printed = 0;
1051                         ntypes_printed++;
1052                 }
1053
1054                 if (event_glob != NULL &&
1055                     !(strglobmatch(syms->symbol, event_glob) ||
1056                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1057                         continue;
1058
1059                 if (strlen(syms->alias))
1060                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1061                 else
1062                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1063                 printf("  %-50s [%s]\n", name,
1064                         event_type_descriptors[type]);
1065
1066                 prev_type = type;
1067                 ++printed;
1068         }
1069
1070         if (ntypes_printed) {
1071                 printed = 0;
1072                 printf("\n");
1073         }
1074         print_hwcache_events(event_glob);
1075
1076         if (event_glob != NULL)
1077                 return;
1078
1079         printf("\n");
1080         printf("  %-50s [%s]\n",
1081                 "rNNN (see 'perf list --help' on how to encode it)",
1082                event_type_descriptors[PERF_TYPE_RAW]);
1083         printf("\n");
1084
1085         printf("  %-50s [%s]\n",
1086                         "mem:<addr>[:access]",
1087                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1088         printf("\n");
1089
1090         print_tracepoint_events(NULL, NULL);
1091
1092         exit(129);
1093 }