SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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                               char *flags,
 414                               struct perf_event_attr *attr,
 415                               const char **strp)
 416 {
 417         char evt_path[MAXPATHLEN];
 418         char id_buf[4];
 419         u64 id;
 420         int fd;
 421
 422         if (flags) {
 423                 if (!strncmp(flags, "record", strlen(flags))) {
 424                         attr->sample_type |= PERF_SAMPLE_RAW;
 425                         attr->sample_type |= PERF_SAMPLE_TIME;
 426                         attr->sample_type |= PERF_SAMPLE_CPU;
 427                 }
 428         }
 429
 430         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 431                  sys_name, evt_name);
 432
 433         fd = open(evt_path, O_RDONLY);
 434         if (fd < 0)
 435                 return EVT_FAILED;
 436
 437         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 438                 close(fd);
 439                 return EVT_FAILED;
 440         }
 441
 442         close(fd);
 443         id = atoll(id_buf);
 444         attr->config = id;
 445         attr->type = PERF_TYPE_TRACEPOINT;
 446         *strp = evt_name + evt_length;
 447
 448         return EVT_HANDLED;
 449 }
 450
 451 /* sys + ':' + event + ':' + flags*/
 452 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 453 static enum event_result
 454 parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
 455                                 char *flags)
 456 {
 457         char evt_path[MAXPATHLEN];
 458         struct dirent *evt_ent;
 459         DIR *evt_dir;
 460
 461         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 462         evt_dir = opendir(evt_path);
 463
 464         if (!evt_dir) {
 465                 perror("Can't open event dir");
 466                 return EVT_FAILED;
 467         }
 468
 469         while ((evt_ent = readdir(evt_dir))) {
 470                 char event_opt[MAX_EVOPT_LEN + 1];
 471                 int len;
 472
 473                 if (!strcmp(evt_ent->d_name, ".")
 474                     || !strcmp(evt_ent->d_name, "..")
 475                     || !strcmp(evt_ent->d_name, "enable")
 476                     || !strcmp(evt_ent->d_name, "filter"))
 477                         continue;
 478
 479                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 480                         continue;
 481
 482                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 483                                evt_ent->d_name, flags ? ":" : "",
 484                                flags ?: "");
 485                 if (len < 0)
 486                         return EVT_FAILED;
 487
 488                 if (parse_events(NULL, event_opt, 0))
 489                         return EVT_FAILED;
 490         }
 491
 492         return EVT_HANDLED_ALL;
 493 }
 494
 495
 496 static enum event_result parse_tracepoint_event(const char **strp,
 497                                     struct perf_event_attr *attr)
 498 {
 499         const char *evt_name;
 500         char *flags;
 501         char sys_name[MAX_EVENT_LENGTH];
 502         unsigned int sys_length, evt_length;
 503
 504         if (debugfs_valid_mountpoint(debugfs_path))
 505                 return 0;
 506
 507         evt_name = strchr(*strp, ':');
 508         if (!evt_name)
 509                 return EVT_FAILED;
 510
 511         sys_length = evt_name - *strp;
 512         if (sys_length >= MAX_EVENT_LENGTH)
 513                 return 0;
 514
 515         strncpy(sys_name, *strp, sys_length);
 516         sys_name[sys_length] = '\0';
 517         evt_name = evt_name + 1;
 518
 519         flags = strchr(evt_name, ':');
 520         if (flags) {
 521                 /* split it out: */
 522                 evt_name = strndup(evt_name, flags - evt_name);
 523                 flags++;
 524         }
 525
 526         evt_length = strlen(evt_name);
 527         if (evt_length >= MAX_EVENT_LENGTH)
 528                 return EVT_FAILED;
 529
 530         if (strpbrk(evt_name, "*?")) {
 531                 *strp = evt_name + evt_length;
 532                 return parse_multiple_tracepoint_event(sys_name, evt_name,
 533                                                        flags);
 534         } else
 535                 return parse_single_tracepoint_event(sys_name, evt_name,
 536                                                      evt_length, flags,
 537                                                      attr, strp);
 538 }
 539
 540 static enum event_result
 541 parse_breakpoint_type(const char *type, const char **strp,
 542                       struct perf_event_attr *attr)
 543 {
 544         int i;
 545
 546         for (i = 0; i < 3; i++) {
 547                 if (!type[i])
 548                         break;
 549
 550                 switch (type[i]) {
 551                 case 'r':
 552                         attr->bp_type |= HW_BREAKPOINT_R;
 553                         break;
 554                 case 'w':
 555                         attr->bp_type |= HW_BREAKPOINT_W;
 556                         break;
 557                 case 'x':
 558                         attr->bp_type |= HW_BREAKPOINT_X;
 559                         break;
 560                 default:
 561                         return EVT_FAILED;
 562                 }
 563         }
 564         if (!attr->bp_type) /* Default */
 565                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 566
 567         *strp = type + i;
 568
 569         return EVT_HANDLED;
 570 }
 571
 572 static enum event_result
 573 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 574 {
 575         const char *target;
 576         const char *type;
 577         char *endaddr;
 578         u64 addr;
 579         enum event_result err;
 580
 581         target = strchr(*strp, ':');
 582         if (!target)
 583                 return EVT_FAILED;
 584
 585         if (strncmp(*strp, "mem", target - *strp) != 0)
 586                 return EVT_FAILED;
 587
 588         target++;
 589
 590         addr = strtoull(target, &endaddr, 0);
 591         if (target == endaddr)
 592                 return EVT_FAILED;
 593
 594         attr->bp_addr = addr;
 595         *strp = endaddr;
 596
 597         type = strchr(target, ':');
 598
 599         /* If no type is defined, just rw as default */
 600         if (!type) {
 601                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 602         } else {
 603                 err = parse_breakpoint_type(++type, strp, attr);
 604                 if (err == EVT_FAILED)
 605                         return EVT_FAILED;
 606         }
 607
 608         /* We should find a nice way to override the access type */
 609         attr->bp_len = HW_BREAKPOINT_LEN_4;
 610         attr->type = PERF_TYPE_BREAKPOINT;
 611
 612         return EVT_HANDLED;
 613 }
 614
 615 static int check_events(const char *str, unsigned int i)
 616 {
 617         int n;
 618
 619         n = strlen(event_symbols[i].symbol);
 620         if (!strncmp(str, event_symbols[i].symbol, n))
 621                 return n;
 622
 623         n = strlen(event_symbols[i].alias);
 624         if (n)
 625                 if (!strncmp(str, event_symbols[i].alias, n))
 626                         return n;
 627         return 0;
 628 }
 629
 630 static enum event_result
 631 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 632 {
 633         const char *str = *strp;
 634         unsigned int i;
 635         int n;
 636
 637         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 638                 n = check_events(str, i);
 639                 if (n > 0) {
 640                         attr->type = event_symbols[i].type;
 641                         attr->config = event_symbols[i].config;
 642                         *strp = str + n;
 643                         return EVT_HANDLED;
 644                 }
 645         }
 646         return EVT_FAILED;
 647 }
 648
 649 static enum event_result
 650 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 651 {
 652         const char *str = *strp;
 653         u64 config;
 654         int n;
 655
 656         if (*str != 'r')
 657                 return EVT_FAILED;
 658         n = hex2u64(str + 1, &config);
 659         if (n > 0) {
 660                 if (str[n+1] == 'p') {
 661                         attr->precise = 1;
 662                         n++;
 663                 }
 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 eu = 1, ek = 1, eh = 1;
 699
 700         if (*str++ != ':')
 701                 return 0;
 702         while (*str) {
 703                 if (*str == 'u')
 704                         eu = 0;
 705                 else if (*str == 'k')
 706                         ek = 0;
 707                 else if (*str == 'h')
 708                         eh = 0;
 709                 else
 710                         break;
 711                 ++str;
 712         }
 713         if (str >= *strp + 2) {
 714                 *strp = str;
 715                 attr->exclude_user   = eu;
 716                 attr->exclude_kernel = ek;
 717                 attr->exclude_hv     = eh;
 718                 return 1;
 719         }
 720         return 0;
 721 }
 722
 723 /*
 724  * Each event can have multiple symbolic names.
 725  * Symbolic names are (almost) exactly matched.
 726  */
 727 static enum event_result
 728 parse_event_symbols(const char **str, struct perf_event_attr *attr)
 729 {
 730         enum event_result ret;
 731
 732         ret = parse_tracepoint_event(str, attr);
 733         if (ret != EVT_FAILED)
 734                 goto modifier;
 735
 736         ret = parse_raw_event(str, attr);
 737         if (ret != EVT_FAILED)
 738                 goto modifier;
 739
 740         ret = parse_numeric_event(str, attr);
 741         if (ret != EVT_FAILED)
 742                 goto modifier;
 743
 744         ret = parse_symbolic_event(str, attr);
 745         if (ret != EVT_FAILED)
 746                 goto modifier;
 747
 748         ret = parse_generic_hw_event(str, attr);
 749         if (ret != EVT_FAILED)
 750                 goto modifier;
 751
 752         ret = parse_breakpoint_event(str, attr);
 753         if (ret != EVT_FAILED)
 754                 goto modifier;
 755
 756         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 757         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 758         return EVT_FAILED;
 759
 760 modifier:
 761         parse_event_modifier(str, attr);
 762
 763         return ret;
 764 }
 765
 766 static int store_event_type(const char *orgname)
 767 {
 768         char filename[PATH_MAX], *c;
 769         FILE *file;
 770         int id, n;
 771
 772         sprintf(filename, "%s/", debugfs_path);
 773         strncat(filename, orgname, strlen(orgname));
 774         strcat(filename, "/id");
 775
 776         c = strchr(filename, ':');
 777         if (c)
 778                 *c = '/';
 779
 780         file = fopen(filename, "r");
 781         if (!file)
 782                 return 0;
 783         n = fscanf(file, "%i", &id);
 784         fclose(file);
 785         if (n < 1) {
 786                 pr_err("cannot store event ID\n");
 787                 return -EINVAL;
 788         }
 789         return perf_header__push_event(id, orgname);
 790 }
 791
 792 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 793 {
 794         struct perf_event_attr attr;
 795         enum event_result ret;
 796
 797         if (strchr(str, ':'))
 798                 if (store_event_type(str) < 0)
 799                         return -1;
 800
 801         for (;;) {
 802                 if (nr_counters == MAX_COUNTERS)
 803                         return -1;
 804
 805                 memset(&attr, 0, sizeof(attr));
 806                 ret = parse_event_symbols(&str, &attr);
 807                 if (ret == EVT_FAILED)
 808                         return -1;
 809
 810                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 811                         return -1;
 812
 813                 if (ret != EVT_HANDLED_ALL) {
 814                         attrs[nr_counters] = attr;
 815                         nr_counters++;
 816                 }
 817
 818                 if (*str == 0)
 819                         break;
 820                 if (*str == ',')
 821                         ++str;
 822                 while (isspace(*str))
 823                         ++str;
 824         }
 825
 826         return 0;
 827 }
 828
 829 int parse_filter(const struct option *opt __used, const char *str,
 830                  int unset __used)
 831 {
 832         int i = nr_counters - 1;
 833         int len = strlen(str);
 834
 835         if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
 836                 fprintf(stderr,
 837                         "-F option should follow a -e tracepoint option\n");
 838                 return -1;
 839         }
 840
 841         filters[i] = malloc(len + 1);
 842         if (!filters[i]) {
 843                 fprintf(stderr, "not enough memory to hold filter string\n");
 844                 return -1;
 845         }
 846         strcpy(filters[i], str);
 847
 848         return 0;
 849 }
 850
 851 static const char * const event_type_descriptors[] = {
 852         "Hardware event",
 853         "Software event",
 854         "Tracepoint event",
 855         "Hardware cache event",
 856         "Raw hardware event descriptor",
 857         "Hardware breakpoint",
 858 };
 859
 860 /*
 861  * Print the events from <debugfs_mount_point>/tracing/events
 862  */
 863
 864 static void print_tracepoint_events(void)
 865 {
 866         DIR *sys_dir, *evt_dir;
 867         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 868         char evt_path[MAXPATHLEN];
 869         char dir_path[MAXPATHLEN];
 870
 871         if (debugfs_valid_mountpoint(debugfs_path))
 872                 return;
 873
 874         sys_dir = opendir(debugfs_path);
 875         if (!sys_dir)
 876                 return;
 877
 878         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 879
 880                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 881                          sys_dirent.d_name);
 882                 evt_dir = opendir(dir_path);
 883                 if (!evt_dir)
 884                         continue;
 885
 886                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 887                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 888                                  sys_dirent.d_name, evt_dirent.d_name);
 889                         printf("  %-42s [%s]\n", evt_path,
 890                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 891                 }
 892                 closedir(evt_dir);
 893         }
 894         closedir(sys_dir);
 895 }
 896
 897 /*
 898  * Print the help text for the event symbols:
 899  */
 900 void print_events(void)
 901 {
 902         struct event_symbol *syms = event_symbols;
 903         unsigned int i, type, op, prev_type = -1;
 904         char name[40];
 905
 906         printf("\n");
 907         printf("List of pre-defined events (to be used in -e):\n");
 908
 909         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 910                 type = syms->type;
 911
 912                 if (type != prev_type)
 913                         printf("\n");
 914
 915                 if (strlen(syms->alias))
 916                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
 917                 else
 918                         strcpy(name, syms->symbol);
 919                 printf("  %-42s [%s]\n", name,
 920                         event_type_descriptors[type]);
 921
 922                 prev_type = type;
 923         }
 924
 925         printf("\n");
 926         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 927                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 928                         /* skip invalid cache type */
 929                         if (!is_cache_op_valid(type, op))
 930                                 continue;
 931
 932                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 933                                 printf("  %-42s [%s]\n",
 934                                         event_cache_name(type, op, i),
 935                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
 936                         }
 937                 }
 938         }
 939
 940         printf("\n");
 941         printf("  %-42s [%s]\n",
 942                 "rNNN", event_type_descriptors[PERF_TYPE_RAW]);
 943         printf("\n");
 944
 945         printf("  %-42s [%s]\n",
 946                         "mem:<addr>[:access]",
 947                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
 948         printf("\n");
 949
 950         print_tracepoint_events();
 951
 952         exit(129);
 953 }