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[PERF_COUNT_HW_CACHE_MAX][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  { "node",                                                              },
  97 };
  98
  99 static const char *hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][MAX_ALIASES] = {
 100  { "load",      "loads",        "read",                                 },
 101  { "store",     "stores",       "write",                                },
 102  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
 103 };
 104
 105 static const char *hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
 106                                   [MAX_ALIASES] = {
 107  { "refs",      "Reference",    "ops",          "access",               },
 108  { "misses",    "miss",                                                 },
 109 };
 110
 111 #define C(x)            PERF_COUNT_HW_CACHE_##x
 112 #define CACHE_READ      (1 << C(OP_READ))
 113 #define CACHE_WRITE     (1 << C(OP_WRITE))
 114 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 115 #define COP(x)          (1 << x)
 116
 117 /*
 118  * cache operartion stat
 119  * L1I : Read and prefetch only
 120  * ITLB and BPU : Read-only
 121  */
 122 static unsigned long hw_cache_stat[C(MAX)] = {
 123  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 124  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 125  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 126  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 127  [C(ITLB)]      = (CACHE_READ),
 128  [C(BPU)]       = (CACHE_READ),
 129  [C(NODE)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 130 };
 131
 132 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
 133         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 134         if (sys_dirent.d_type == DT_DIR &&                                     \
 135            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 136            (strcmp(sys_dirent.d_name, "..")))
 137
 138 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 139 {
 140         char evt_path[MAXPATHLEN];
 141         int fd;
 142
 143         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 144                         sys_dir->d_name, evt_dir->d_name);
 145         fd = open(evt_path, O_RDONLY);
 146         if (fd < 0)
 147                 return -EINVAL;
 148         close(fd);
 149
 150         return 0;
 151 }
 152
 153 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
 154         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 155         if (evt_dirent.d_type == DT_DIR &&                                     \
 156            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 157            (strcmp(evt_dirent.d_name, "..")) &&                                \
 158            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 159
 160 #define MAX_EVENT_LENGTH 512
 161
 162
 163 struct tracepoint_path *tracepoint_id_to_path(u64 config)
 164 {
 165         struct tracepoint_path *path = NULL;
 166         DIR *sys_dir, *evt_dir;
 167         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 168         char id_buf[4];
 169         int fd;
 170         u64 id;
 171         char evt_path[MAXPATHLEN];
 172         char dir_path[MAXPATHLEN];
 173
 174         if (debugfs_valid_mountpoint(debugfs_path))
 175                 return NULL;
 176
 177         sys_dir = opendir(debugfs_path);
 178         if (!sys_dir)
 179                 return NULL;
 180
 181         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 182
 183                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 184                          sys_dirent.d_name);
 185                 evt_dir = opendir(dir_path);
 186                 if (!evt_dir)
 187                         continue;
 188
 189                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 190
 191                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 192                                  evt_dirent.d_name);
 193                         fd = open(evt_path, O_RDONLY);
 194                         if (fd < 0)
 195                                 continue;
 196                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 197                                 close(fd);
 198                                 continue;
 199                         }
 200                         close(fd);
 201                         id = atoll(id_buf);
 202                         if (id == config) {
 203                                 closedir(evt_dir);
 204                                 closedir(sys_dir);
 205                                 path = zalloc(sizeof(*path));
 206                                 path->system = malloc(MAX_EVENT_LENGTH);
 207                                 if (!path->system) {
 208                                         free(path);
 209                                         return NULL;
 210                                 }
 211                                 path->name = malloc(MAX_EVENT_LENGTH);
 212                                 if (!path->name) {
 213                                         free(path->system);
 214                                         free(path);
 215                                         return NULL;
 216                                 }
 217                                 strncpy(path->system, sys_dirent.d_name,
 218                                         MAX_EVENT_LENGTH);
 219                                 strncpy(path->name, evt_dirent.d_name,
 220                                         MAX_EVENT_LENGTH);
 221                                 return path;
 222                         }
 223                 }
 224                 closedir(evt_dir);
 225         }
 226
 227         closedir(sys_dir);
 228         return NULL;
 229 }
 230
 231 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 232 static const char *tracepoint_id_to_name(u64 config)
 233 {
 234         static char buf[TP_PATH_LEN];
 235         struct tracepoint_path *path;
 236
 237         path = tracepoint_id_to_path(config);
 238         if (path) {
 239                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 240                 free(path->name);
 241                 free(path->system);
 242                 free(path);
 243         } else
 244                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 245
 246         return buf;
 247 }
 248
 249 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 250 {
 251         if (hw_cache_stat[cache_type] & COP(cache_op))
 252                 return 1;       /* valid */
 253         else
 254                 return 0;       /* invalid */
 255 }
 256
 257 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 258 {
 259         static char name[50];
 260
 261         if (cache_result) {
 262                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 263                         hw_cache_op[cache_op][0],
 264                         hw_cache_result[cache_result][0]);
 265         } else {
 266                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 267                         hw_cache_op[cache_op][1]);
 268         }
 269
 270         return name;
 271 }
 272
 273 const char *event_type(int type)
 274 {
 275         switch (type) {
 276         case PERF_TYPE_HARDWARE:
 277                 return "hardware";
 278
 279         case PERF_TYPE_SOFTWARE:
 280                 return "software";
 281
 282         case PERF_TYPE_TRACEPOINT:
 283                 return "tracepoint";
 284
 285         case PERF_TYPE_HW_CACHE:
 286                 return "hardware-cache";
 287
 288         default:
 289                 break;
 290         }
 291
 292         return "unknown";
 293 }
 294
 295 const char *event_name(struct perf_evsel *evsel)
 296 {
 297         u64 config = evsel->attr.config;
 298         int type = evsel->attr.type;
 299
 300         if (evsel->name)
 301                 return evsel->name;
 302
 303         return __event_name(type, config);
 304 }
 305
 306 const char *__event_name(int type, u64 config)
 307 {
 308         static char buf[32];
 309
 310         if (type == PERF_TYPE_RAW) {
 311                 sprintf(buf, "raw 0x%" PRIx64, config);
 312                 return buf;
 313         }
 314
 315         switch (type) {
 316         case PERF_TYPE_HARDWARE:
 317                 if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
 318                         return hw_event_names[config];
 319                 return "unknown-hardware";
 320
 321         case PERF_TYPE_HW_CACHE: {
 322                 u8 cache_type, cache_op, cache_result;
 323
 324                 cache_type   = (config >>  0) & 0xff;
 325                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 326                         return "unknown-ext-hardware-cache-type";
 327
 328                 cache_op     = (config >>  8) & 0xff;
 329                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 330                         return "unknown-ext-hardware-cache-op";
 331
 332                 cache_result = (config >> 16) & 0xff;
 333                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 334                         return "unknown-ext-hardware-cache-result";
 335
 336                 if (!is_cache_op_valid(cache_type, cache_op))
 337                         return "invalid-cache";
 338
 339                 return event_cache_name(cache_type, cache_op, cache_result);
 340         }
 341
 342         case PERF_TYPE_SOFTWARE:
 343                 if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
 344                         return sw_event_names[config];
 345                 return "unknown-software";
 346
 347         case PERF_TYPE_TRACEPOINT:
 348                 return tracepoint_id_to_name(config);
 349
 350         default:
 351                 break;
 352         }
 353
 354         return "unknown";
 355 }
 356
 357 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 358 {
 359         int i, j;
 360         int n, longest = -1;
 361
 362         for (i = 0; i < size; i++) {
 363                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 364                         n = strlen(names[i][j]);
 365                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 366                                 longest = n;
 367                 }
 368                 if (longest > 0) {
 369                         *str += longest;
 370                         return i;
 371                 }
 372         }
 373
 374         return -1;
 375 }
 376
 377 static enum event_result
 378 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 379 {
 380         const char *s = *str;
 381         int cache_type = -1, cache_op = -1, cache_result = -1;
 382
 383         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 384         /*
 385          * No fallback - if we cannot get a clear cache type
 386          * then bail out:
 387          */
 388         if (cache_type == -1)
 389                 return EVT_FAILED;
 390
 391         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 392                 ++s;
 393
 394                 if (cache_op == -1) {
 395                         cache_op = parse_aliases(&s, hw_cache_op,
 396                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 397                         if (cache_op >= 0) {
 398                                 if (!is_cache_op_valid(cache_type, cache_op))
 399                                         return EVT_FAILED;
 400                                 continue;
 401                         }
 402                 }
 403
 404                 if (cache_result == -1) {
 405                         cache_result = parse_aliases(&s, hw_cache_result,
 406                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 407                         if (cache_result >= 0)
 408                                 continue;
 409                 }
 410
 411                 /*
 412                  * Can't parse this as a cache op or result, so back up
 413                  * to the '-'.
 414                  */
 415                 --s;
 416                 break;
 417         }
 418
 419         /*
 420          * Fall back to reads:
 421          */
 422         if (cache_op == -1)
 423                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 424
 425         /*
 426          * Fall back to accesses:
 427          */
 428         if (cache_result == -1)
 429                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 430
 431         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 432         attr->type = PERF_TYPE_HW_CACHE;
 433
 434         *str = s;
 435         return EVT_HANDLED;
 436 }
 437
 438 static enum event_result
 439 parse_single_tracepoint_event(char *sys_name,
 440                               const char *evt_name,
 441                               unsigned int evt_length,
 442                               struct perf_event_attr *attr,
 443                               const char **strp)
 444 {
 445         char evt_path[MAXPATHLEN];
 446         char id_buf[4];
 447         u64 id;
 448         int fd;
 449
 450         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 451                  sys_name, evt_name);
 452
 453         fd = open(evt_path, O_RDONLY);
 454         if (fd < 0)
 455                 return EVT_FAILED;
 456
 457         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 458                 close(fd);
 459                 return EVT_FAILED;
 460         }
 461
 462         close(fd);
 463         id = atoll(id_buf);
 464         attr->config = id;
 465         attr->type = PERF_TYPE_TRACEPOINT;
 466         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 467
 468         attr->sample_type |= PERF_SAMPLE_RAW;
 469         attr->sample_type |= PERF_SAMPLE_TIME;
 470         attr->sample_type |= PERF_SAMPLE_CPU;
 471
 472         attr->sample_period = 1;
 473
 474
 475         return EVT_HANDLED;
 476 }
 477
 478 /* sys + ':' + event + ':' + flags*/
 479 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
 480 static enum event_result
 481 parse_multiple_tracepoint_event(struct perf_evlist *evlist, char *sys_name,
 482                                 const char *evt_exp, char *flags)
 483 {
 484         char evt_path[MAXPATHLEN];
 485         struct dirent *evt_ent;
 486         DIR *evt_dir;
 487
 488         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 489         evt_dir = opendir(evt_path);
 490
 491         if (!evt_dir) {
 492                 perror("Can't open event dir");
 493                 return EVT_FAILED;
 494         }
 495
 496         while ((evt_ent = readdir(evt_dir))) {
 497                 char event_opt[MAX_EVOPT_LEN + 1];
 498                 int len;
 499
 500                 if (!strcmp(evt_ent->d_name, ".")
 501                     || !strcmp(evt_ent->d_name, "..")
 502                     || !strcmp(evt_ent->d_name, "enable")
 503                     || !strcmp(evt_ent->d_name, "filter"))
 504                         continue;
 505
 506                 if (!strglobmatch(evt_ent->d_name, evt_exp))
 507                         continue;
 508
 509                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 510                                evt_ent->d_name, flags ? ":" : "",
 511                                flags ?: "");
 512                 if (len < 0)
 513                         return EVT_FAILED;
 514
 515                 if (parse_events(evlist, event_opt, 0))
 516                         return EVT_FAILED;
 517         }
 518
 519         return EVT_HANDLED_ALL;
 520 }
 521
 522 static enum event_result
 523 parse_tracepoint_event(struct perf_evlist *evlist, const char **strp,
 524                        struct perf_event_attr *attr)
 525 {
 526         const char *evt_name;
 527         char *flags = NULL, *comma_loc;
 528         char sys_name[MAX_EVENT_LENGTH];
 529         unsigned int sys_length, evt_length;
 530
 531         if (debugfs_valid_mountpoint(debugfs_path))
 532                 return 0;
 533
 534         evt_name = strchr(*strp, ':');
 535         if (!evt_name)
 536                 return EVT_FAILED;
 537
 538         sys_length = evt_name - *strp;
 539         if (sys_length >= MAX_EVENT_LENGTH)
 540                 return 0;
 541
 542         strncpy(sys_name, *strp, sys_length);
 543         sys_name[sys_length] = '\0';
 544         evt_name = evt_name + 1;
 545
 546         comma_loc = strchr(evt_name, ',');
 547         if (comma_loc) {
 548                 /* take the event name up to the comma */
 549                 evt_name = strndup(evt_name, comma_loc - evt_name);
 550         }
 551         flags = strchr(evt_name, ':');
 552         if (flags) {
 553                 /* split it out: */
 554                 evt_name = strndup(evt_name, flags - evt_name);
 555                 flags++;
 556         }
 557
 558         evt_length = strlen(evt_name);
 559         if (evt_length >= MAX_EVENT_LENGTH)
 560                 return EVT_FAILED;
 561         if (strpbrk(evt_name, "*?")) {
 562                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
 563                 return parse_multiple_tracepoint_event(evlist, sys_name,
 564                                                        evt_name, flags);
 565         } else {
 566                 return parse_single_tracepoint_event(sys_name, evt_name,
 567                                                      evt_length, attr, strp);
 568         }
 569 }
 570
 571 static enum event_result
 572 parse_breakpoint_type(const char *type, const char **strp,
 573                       struct perf_event_attr *attr)
 574 {
 575         int i;
 576
 577         for (i = 0; i < 3; i++) {
 578                 if (!type[i])
 579                         break;
 580
 581                 switch (type[i]) {
 582                 case 'r':
 583                         attr->bp_type |= HW_BREAKPOINT_R;
 584                         break;
 585                 case 'w':
 586                         attr->bp_type |= HW_BREAKPOINT_W;
 587                         break;
 588                 case 'x':
 589                         attr->bp_type |= HW_BREAKPOINT_X;
 590                         break;
 591                 default:
 592                         return EVT_FAILED;
 593                 }
 594         }
 595         if (!attr->bp_type) /* Default */
 596                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 597
 598         *strp = type + i;
 599
 600         return EVT_HANDLED;
 601 }
 602
 603 static enum event_result
 604 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 605 {
 606         const char *target;
 607         const char *type;
 608         char *endaddr;
 609         u64 addr;
 610         enum event_result err;
 611
 612         target = strchr(*strp, ':');
 613         if (!target)
 614                 return EVT_FAILED;
 615
 616         if (strncmp(*strp, "mem", target - *strp) != 0)
 617                 return EVT_FAILED;
 618
 619         target++;
 620
 621         addr = strtoull(target, &endaddr, 0);
 622         if (target == endaddr)
 623                 return EVT_FAILED;
 624
 625         attr->bp_addr = addr;
 626         *strp = endaddr;
 627
 628         type = strchr(target, ':');
 629
 630         /* If no type is defined, just rw as default */
 631         if (!type) {
 632                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 633         } else {
 634                 err = parse_breakpoint_type(++type, strp, attr);
 635                 if (err == EVT_FAILED)
 636                         return EVT_FAILED;
 637         }
 638
 639         /*
 640          * We should find a nice way to override the access length
 641          * Provide some defaults for now
 642          */
 643         if (attr->bp_type == HW_BREAKPOINT_X)
 644                 attr->bp_len = sizeof(long);
 645         else
 646                 attr->bp_len = HW_BREAKPOINT_LEN_4;
 647
 648         attr->type = PERF_TYPE_BREAKPOINT;
 649
 650         return EVT_HANDLED;
 651 }
 652
 653 static int check_events(const char *str, unsigned int i)
 654 {
 655         int n;
 656
 657         n = strlen(event_symbols[i].symbol);
 658         if (!strncasecmp(str, event_symbols[i].symbol, n))
 659                 return n;
 660
 661         n = strlen(event_symbols[i].alias);
 662         if (n) {
 663                 if (!strncasecmp(str, event_symbols[i].alias, n))
 664                         return n;
 665         }
 666
 667         return 0;
 668 }
 669
 670 static enum event_result
 671 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 672 {
 673         const char *str = *strp;
 674         unsigned int i;
 675         int n;
 676
 677         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 678                 n = check_events(str, i);
 679                 if (n > 0) {
 680                         attr->type = event_symbols[i].type;
 681                         attr->config = event_symbols[i].config;
 682                         *strp = str + n;
 683                         return EVT_HANDLED;
 684                 }
 685         }
 686         return EVT_FAILED;
 687 }
 688
 689 static enum event_result
 690 parse_raw_event(const char **strp, struct perf_event_attr *attr)
 691 {
 692         const char *str = *strp;
 693         u64 config;
 694         int n;
 695
 696         if (*str != 'r')
 697                 return EVT_FAILED;
 698         n = hex2u64(str + 1, &config);
 699         if (n > 0) {
 700                 const char *end = str + n + 1;
 701                 if (*end != '\0' && *end != ',' && *end != ':')
 702                         return EVT_FAILED;
 703
 704                 *strp = end;
 705                 attr->type = PERF_TYPE_RAW;
 706                 attr->config = config;
 707                 return EVT_HANDLED;
 708         }
 709         return EVT_FAILED;
 710 }
 711
 712 static enum event_result
 713 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 714 {
 715         const char *str = *strp;
 716         char *endp;
 717         unsigned long type;
 718         u64 config;
 719
 720         type = strtoul(str, &endp, 0);
 721         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 722                 str = endp + 1;
 723                 config = strtoul(str, &endp, 0);
 724                 if (endp > str) {
 725                         attr->type = type;
 726                         attr->config = config;
 727                         *strp = endp;
 728                         return EVT_HANDLED;
 729                 }
 730         }
 731         return EVT_FAILED;
 732 }
 733
 734 static int
 735 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 736 {
 737         const char *str = *strp;
 738         int exclude = 0;
 739         int eu = 0, ek = 0, eh = 0, precise = 0;
 740
 741         if (!*str)
 742                 return 0;
 743
 744         if (*str == ',')
 745                 return 0;
 746
 747         if (*str++ != ':')
 748                 return -1;
 749
 750         while (*str) {
 751                 if (*str == 'u') {
 752                         if (!exclude)
 753                                 exclude = eu = ek = eh = 1;
 754                         eu = 0;
 755                 } else if (*str == 'k') {
 756                         if (!exclude)
 757                                 exclude = eu = ek = eh = 1;
 758                         ek = 0;
 759                 } else if (*str == 'h') {
 760                         if (!exclude)
 761                                 exclude = eu = ek = eh = 1;
 762                         eh = 0;
 763                 } else if (*str == 'p') {
 764                         precise++;
 765                 } else
 766                         break;
 767
 768                 ++str;
 769         }
 770         if (str < *strp + 2)
 771                 return -1;
 772
 773         *strp = str;
 774
 775         attr->exclude_user   = eu;
 776         attr->exclude_kernel = ek;
 777         attr->exclude_hv     = eh;
 778         attr->precise_ip     = precise;
 779
 780         return 0;
 781 }
 782
 783 /*
 784  * Each event can have multiple symbolic names.
 785  * Symbolic names are (almost) exactly matched.
 786  */
 787 static enum event_result
 788 parse_event_symbols(struct perf_evlist *evlist, const char **str,
 789                     struct perf_event_attr *attr)
 790 {
 791         enum event_result ret;
 792
 793         ret = parse_tracepoint_event(evlist, str, attr);
 794         if (ret != EVT_FAILED)
 795                 goto modifier;
 796
 797         ret = parse_raw_event(str, attr);
 798         if (ret != EVT_FAILED)
 799                 goto modifier;
 800
 801         ret = parse_numeric_event(str, attr);
 802         if (ret != EVT_FAILED)
 803                 goto modifier;
 804
 805         ret = parse_symbolic_event(str, attr);
 806         if (ret != EVT_FAILED)
 807                 goto modifier;
 808
 809         ret = parse_generic_hw_event(str, attr);
 810         if (ret != EVT_FAILED)
 811                 goto modifier;
 812
 813         ret = parse_breakpoint_event(str, attr);
 814         if (ret != EVT_FAILED)
 815                 goto modifier;
 816
 817         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 818         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 819         return EVT_FAILED;
 820
 821 modifier:
 822         if (parse_event_modifier(str, attr) < 0) {
 823                 fprintf(stderr, "invalid event modifier: '%s'\n", *str);
 824                 fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
 825
 826                 return EVT_FAILED;
 827         }
 828
 829         return ret;
 830 }
 831
 832 int parse_events(struct perf_evlist *evlist , const char *str, int unset __used)
 833 {
 834         struct perf_event_attr attr;
 835         enum event_result ret;
 836         const char *ostr;
 837
 838         for (;;) {
 839                 ostr = str;
 840                 memset(&attr, 0, sizeof(attr));
 841                 ret = parse_event_symbols(evlist, &str, &attr);
 842                 if (ret == EVT_FAILED)
 843                         return -1;
 844
 845                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 846                         return -1;
 847
 848                 if (ret != EVT_HANDLED_ALL) {
 849                         struct perf_evsel *evsel;
 850                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
 851                         if (evsel == NULL)
 852                                 return -1;
 853                         perf_evlist__add(evlist, evsel);
 854
 855                         evsel->name = calloc(str - ostr + 1, 1);
 856                         if (!evsel->name)
 857                                 return -1;
 858                         strncpy(evsel->name, ostr, str - ostr);
 859                 }
 860
 861                 if (*str == 0)
 862                         break;
 863                 if (*str == ',')
 864                         ++str;
 865                 while (isspace(*str))
 866                         ++str;
 867         }
 868
 869         return 0;
 870 }
 871
 872 int parse_events_option(const struct option *opt, const char *str,
 873                         int unset __used)
 874 {
 875         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 876         return parse_events(evlist, str, unset);
 877 }
 878
 879 int parse_filter(const struct option *opt, const char *str,
 880                  int unset __used)
 881 {
 882         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 883         struct perf_evsel *last = NULL;
 884
 885         if (evlist->nr_entries > 0)
 886                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 887
 888         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 889                 fprintf(stderr,
 890                         "-F option should follow a -e tracepoint option\n");
 891                 return -1;
 892         }
 893
 894         last->filter = strdup(str);
 895         if (last->filter == NULL) {
 896                 fprintf(stderr, "not enough memory to hold filter string\n");
 897                 return -1;
 898         }
 899
 900         return 0;
 901 }
 902
 903 static const char * const event_type_descriptors[] = {
 904         "Hardware event",
 905         "Software event",
 906         "Tracepoint event",
 907         "Hardware cache event",
 908         "Raw hardware event descriptor",
 909         "Hardware breakpoint",
 910 };
 911
 912 /*
 913  * Print the events from <debugfs_mount_point>/tracing/events
 914  */
 915
 916 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 917 {
 918         DIR *sys_dir, *evt_dir;
 919         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 920         char evt_path[MAXPATHLEN];
 921         char dir_path[MAXPATHLEN];
 922
 923         if (debugfs_valid_mountpoint(debugfs_path))
 924                 return;
 925
 926         sys_dir = opendir(debugfs_path);
 927         if (!sys_dir)
 928                 return;
 929
 930         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 931                 if (subsys_glob != NULL &&
 932                     !strglobmatch(sys_dirent.d_name, subsys_glob))
 933                         continue;
 934
 935                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 936                          sys_dirent.d_name);
 937                 evt_dir = opendir(dir_path);
 938                 if (!evt_dir)
 939                         continue;
 940
 941                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 942                         if (event_glob != NULL &&
 943                             !strglobmatch(evt_dirent.d_name, event_glob))
 944                                 continue;
 945
 946                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 947                                  sys_dirent.d_name, evt_dirent.d_name);
 948                         printf("  %-50s [%s]\n", evt_path,
 949                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 950                 }
 951                 closedir(evt_dir);
 952         }
 953         closedir(sys_dir);
 954 }
 955
 956 /*
 957  * Check whether event is in <debugfs_mount_point>/tracing/events
 958  */
 959
 960 int is_valid_tracepoint(const char *event_string)
 961 {
 962         DIR *sys_dir, *evt_dir;
 963         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 964         char evt_path[MAXPATHLEN];
 965         char dir_path[MAXPATHLEN];
 966
 967         if (debugfs_valid_mountpoint(debugfs_path))
 968                 return 0;
 969
 970         sys_dir = opendir(debugfs_path);
 971         if (!sys_dir)
 972                 return 0;
 973
 974         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 975
 976                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 977                          sys_dirent.d_name);
 978                 evt_dir = opendir(dir_path);
 979                 if (!evt_dir)
 980                         continue;
 981
 982                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 983                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 984                                  sys_dirent.d_name, evt_dirent.d_name);
 985                         if (!strcmp(evt_path, event_string)) {
 986                                 closedir(evt_dir);
 987                                 closedir(sys_dir);
 988                                 return 1;
 989                         }
 990                 }
 991                 closedir(evt_dir);
 992         }
 993         closedir(sys_dir);
 994         return 0;
 995 }
 996
 997 void print_events_type(u8 type)
 998 {
 999         struct event_symbol *syms = event_symbols;
1000         unsigned int i;
1001         char name[64];
1002
1003         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1004                 if (type != syms->type)
1005                         continue;
1006
1007                 if (strlen(syms->alias))
1008                         snprintf(name, sizeof(name),  "%s OR %s",
1009                                  syms->symbol, syms->alias);
1010                 else
1011                         snprintf(name, sizeof(name), "%s", syms->symbol);
1012
1013                 printf("  %-50s [%s]\n", name,
1014                         event_type_descriptors[type]);
1015         }
1016 }
1017
1018 int print_hwcache_events(const char *event_glob)
1019 {
1020         unsigned int type, op, i, printed = 0;
1021
1022         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1023                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1024                         /* skip invalid cache type */
1025                         if (!is_cache_op_valid(type, op))
1026                                 continue;
1027
1028                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1029                                 char *name = event_cache_name(type, op, i);
1030
1031                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1032                                         continue;
1033
1034                                 printf("  %-50s [%s]\n", name,
1035                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
1036                                 ++printed;
1037                         }
1038                 }
1039         }
1040
1041         return printed;
1042 }
1043
1044 #define MAX_NAME_LEN 100
1045
1046 /*
1047  * Print the help text for the event symbols:
1048  */
1049 void print_events(const char *event_glob)
1050 {
1051         unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1052         struct event_symbol *syms = event_symbols;
1053         char name[MAX_NAME_LEN];
1054
1055         printf("\n");
1056         printf("List of pre-defined events (to be used in -e):\n");
1057
1058         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1059                 type = syms->type;
1060
1061                 if (type != prev_type && printed) {
1062                         printf("\n");
1063                         printed = 0;
1064                         ntypes_printed++;
1065                 }
1066
1067                 if (event_glob != NULL &&
1068                     !(strglobmatch(syms->symbol, event_glob) ||
1069                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1070                         continue;
1071
1072                 if (strlen(syms->alias))
1073                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1074                 else
1075                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1076                 printf("  %-50s [%s]\n", name,
1077                         event_type_descriptors[type]);
1078
1079                 prev_type = type;
1080                 ++printed;
1081         }
1082
1083         if (ntypes_printed) {
1084                 printed = 0;
1085                 printf("\n");
1086         }
1087         print_hwcache_events(event_glob);
1088
1089         if (event_glob != NULL)
1090                 return;
1091
1092         printf("\n");
1093         printf("  %-50s [%s]\n",
1094                 "rNNN (see 'perf list --help' on how to encode it)",
1095                event_type_descriptors[PERF_TYPE_RAW]);
1096         printf("\n");
1097
1098         printf("  %-50s [%s]\n",
1099                         "mem:<addr>[:access]",
1100                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1101         printf("\n");
1102
1103         print_tracepoint_events(NULL, NULL);
1104 }