tools/perf/util/parse-events.l

   1
   2 %option reentrant
   3 %option bison-bridge
   4 %option prefix="parse_events_"
   5 %option stack
   6 %option bison-locations
   7 %option yylineno
   8 %option reject
   9
  10 %{
  11 #include <errno.h>
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include "parse-events.h"
  16 #include "parse-events-bison.h"
  17 #include "evsel.h"
  18
  19 char *parse_events_get_text(yyscan_t yyscanner);
  20 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
  21 int parse_events_get_column(yyscan_t yyscanner);
  22 int parse_events_get_leng(yyscan_t yyscanner);
  23
  24 static int get_column(yyscan_t scanner)
  25 {
  26         return parse_events_get_column(scanner) - parse_events_get_leng(scanner);
  27 }
  28
  29 static int value(struct parse_events_state *parse_state, yyscan_t scanner, int base)
  30 {
  31         YYSTYPE *yylval = parse_events_get_lval(scanner);
  32         char *text = parse_events_get_text(scanner);
  33         u64 num;
  34
  35         errno = 0;
  36         num = strtoull(text, NULL, base);
  37         if (errno) {
  38                 struct parse_events_error *error = parse_state->error;
  39                 char *help = NULL;
  40
  41                 if (asprintf(&help, "Bad base %d number \"%s\"", base, text) > 0)
  42                         parse_events_error__handle(error, get_column(scanner), help , NULL);
  43
  44                 return PE_ERROR;
  45         }
  46
  47         yylval->num = num;
  48         return PE_VALUE;
  49 }
  50
  51 static int str(yyscan_t scanner, int token)
  52 {
  53         YYSTYPE *yylval = parse_events_get_lval(scanner);
  54         char *text = parse_events_get_text(scanner);
  55
  56         if (text[0] != '\'') {
  57                 yylval->str = strdup(text);
  58         } else {
  59                 /*
  60                  * If a text tag specified on the command line
  61                  * contains opening single quite ' then it is
  62                  * expected that the tag ends with single quote
  63                  * as well, like this:
  64                  *     name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
  65                  * quotes need to be escaped to bypass shell
  66                  * processing.
  67                  */
  68                 yylval->str = strndup(&text[1], strlen(text) - 2);
  69         }
  70
  71         return token;
  72 }
  73
  74 static int lc_str(yyscan_t scanner, const struct parse_events_state *state)
  75 {
  76         return str(scanner, state->match_legacy_cache_terms ? PE_LEGACY_CACHE : PE_NAME);
  77 }
  78
  79 /*
  80  * This function is called when the parser gets two kind of input:
  81  *
  82  *      @cfg1 or @cfg2=config
  83  *
  84  * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
  85  * bison.  In the latter case it is necessary to keep the string intact so that
  86  * the PMU kernel driver can determine what configurable is associated to
  87  * 'config'.
  88  */
  89 static int drv_str(yyscan_t scanner, int token)
  90 {
  91         YYSTYPE *yylval = parse_events_get_lval(scanner);
  92         char *text = parse_events_get_text(scanner);
  93
  94         /* Strip off the '@' */
  95         yylval->str = strdup(text + 1);
  96         return token;
  97 }
  98
  99 /*
 100  * Use yyless to return all the characaters to the input. Update the column for
 101  * location debugging. If __alloc is non-zero set yylval to the text for the
 102  * returned token's value.
 103  */
 104 #define REWIND(__alloc)                         \
 105 do {                                                            \
 106         YYSTYPE *__yylval = parse_events_get_lval(yyscanner);   \
 107         char *text = parse_events_get_text(yyscanner);          \
 108                                                                 \
 109         if (__alloc)                                            \
 110                 __yylval->str = strdup(text);                   \
 111                                                                 \
 112         yycolumn -= strlen(text);                               \
 113         yyless(0);                                              \
 114 } while (0)
 115
 116 static int sym(yyscan_t scanner, int type, int config)
 117 {
 118         YYSTYPE *yylval = parse_events_get_lval(scanner);
 119
 120         yylval->num = (type << 16) + config;
 121         return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
 122 }
 123
 124 static int term(yyscan_t scanner, enum parse_events__term_type type)
 125 {
 126         YYSTYPE *yylval = parse_events_get_lval(scanner);
 127
 128         yylval->term_type = type;
 129         return PE_TERM;
 130 }
 131
 132 static int hw_term(yyscan_t scanner, int config)
 133 {
 134         YYSTYPE *yylval = parse_events_get_lval(scanner);
 135         char *text = parse_events_get_text(scanner);
 136
 137         yylval->hardware_term.str = strdup(text);
 138         yylval->hardware_term.num = PERF_TYPE_HARDWARE + config;
 139         return PE_TERM_HW;
 140 }
 141
 142 static void modifiers_error(struct parse_events_state *parse_state, yyscan_t scanner,
 143                             int pos, char mod_char, const char *mod_name)
 144 {
 145         struct parse_events_error *error = parse_state->error;
 146         char *help = NULL;
 147
 148         if (asprintf(&help, "Duplicate modifier '%c' (%s)", mod_char, mod_name) > 0)
 149                 parse_events_error__handle(error, get_column(scanner) + pos, help , NULL);
 150 }
 151
 152 static int modifiers(struct parse_events_state *parse_state, yyscan_t scanner)
 153 {
 154         YYSTYPE *yylval = parse_events_get_lval(scanner);
 155         char *text = parse_events_get_text(scanner);
 156         struct parse_events_modifier mod = { .precise = 0, };
 157
 158         for (size_t i = 0, n = strlen(text); i < n; i++) {
 159 #define CASE(c, field)                                                  \
 160                 case c:                                                 \
 161                         if (mod.field) {                                \
 162                                 modifiers_error(parse_state, scanner, i, c, #field); \
 163                                 return PE_ERROR;                        \
 164                         }                                               \
 165                         mod.field = true;                               \
 166                         break
 167
 168                 switch (text[i]) {
 169                 CASE('u', user);
 170                 CASE('k', kernel);
 171                 CASE('h', hypervisor);
 172                 CASE('I', non_idle);
 173                 CASE('G', guest);
 174                 CASE('H', host);
 175                 case 'p':
 176                         mod.precise++;
 177                         /*
 178                          * precise ip:
 179                          *
 180                          *  0 - SAMPLE_IP can have arbitrary skid
 181                          *  1 - SAMPLE_IP must have constant skid
 182                          *  2 - SAMPLE_IP requested to have 0 skid
 183                          *  3 - SAMPLE_IP must have 0 skid
 184                          *
 185                          *  See also PERF_RECORD_MISC_EXACT_IP
 186                          */
 187                         if (mod.precise > 3) {
 188                                 struct parse_events_error *error = parse_state->error;
 189                                 char *help = strdup("Maximum precise value is 3");
 190
 191                                 if (help) {
 192                                         parse_events_error__handle(error, get_column(scanner) + i,
 193                                                                    help , NULL);
 194                                 }
 195                                 return PE_ERROR;
 196                         }
 197                         break;
 198                 CASE('P', precise_max);
 199                 CASE('S', sample_read);
 200                 CASE('D', pinned);
 201                 CASE('W', weak);
 202                 CASE('e', exclusive);
 203                 CASE('b', bpf);
 204                 CASE('R', retire_lat);
 205                 default:
 206                         return PE_ERROR;
 207                 }
 208 #undef CASE
 209         }
 210         yylval->mod = mod;
 211         return PE_MODIFIER_EVENT;
 212 }
 213
 214 #define YY_USER_ACTION                                  \
 215 do {                                                    \
 216         yylloc->last_column  = yylloc->first_column;    \
 217         yylloc->first_column = yycolumn;                \
 218         yycolumn += yyleng;                             \
 219 } while (0);
 220
 221 #define USER_REJECT             \
 222         yycolumn -= yyleng;     \
 223         REJECT
 224
 225 %}
 226
 227 %x mem
 228 %s config
 229 %x event
 230
 231 group           [^,{}/]*[{][^}]*[}][^,{}/]*
 232 event_pmu       [^,{}/]+[/][^/]*[/][^,{}/]*
 233 event           [^,{}/]+
 234
 235 num_dec         [0-9]+
 236 num_hex         0x[a-fA-F0-9]{1,16}
 237 num_raw_hex     [a-fA-F0-9]{1,16}
 238 name            [a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
 239 name_tag        [\'][a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
 240 name_minus      [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
 241 drv_cfg_term    [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
 242 /*
 243  * If you add a modifier you need to update check_modifier().
 244  * Also, the letters in modifier_event must not be in modifier_bp.
 245  */
 246 modifier_event  [ukhpPGHSDIWebR]{1,16}
 247 modifier_bp     [rwx]{1,3}
 248 lc_type         (L1-dcache|l1-d|l1d|L1-data|L1-icache|l1-i|l1i|L1-instruction|LLC|L2|dTLB|d-tlb|Data-TLB|iTLB|i-tlb|Instruction-TLB|branch|branches|bpu|btb|bpc|node)
 249 lc_op_result    (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss)
 250 digit           [0-9]
 251 non_digit       [^0-9]
 252
 253 %%
 254
 255 %{
 256         struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);
 257         {
 258                 int start_token = _parse_state->stoken;
 259
 260                 if (start_token == PE_START_TERMS)
 261                         BEGIN(config);
 262                 else if (start_token == PE_START_EVENTS)
 263                         BEGIN(event);
 264
 265                 if (start_token) {
 266                         _parse_state->stoken = 0;
 267                         /*
 268                          * The flex parser does not init locations variable
 269                          * via the scan_string interface, so we need do the
 270                          * init in here.
 271                          */
 272                         yycolumn = 0;
 273                         return start_token;
 274                 }
 275          }
 276 %}
 277
 278 <event>{
 279
 280 {group}         {
 281                         BEGIN(INITIAL);
 282                         REWIND(0);
 283                 }
 284
 285 {event_pmu}     |
 286 {event}         {
 287                         BEGIN(INITIAL);
 288                         REWIND(1);
 289                         return PE_EVENT_NAME;
 290                 }
 291
 292 <<EOF>>         {
 293                         BEGIN(INITIAL);
 294                         REWIND(0);
 295                 }
 296 ,               {
 297                         return ',';
 298                 }
 299 }
 300
 301 <config>{
 302         /*
 303          * Please update config_term_names when new static term is added.
 304          */
 305 config                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
 306 config1                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
 307 config2                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
 308 config3                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG3); }
 309 name                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
 310 period                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
 311 freq                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
 312 branch_type             { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
 313 time                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
 314 call-graph              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
 315 stack-size              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
 316 max-stack               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
 317 nr                      { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }
 318 inherit                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
 319 no-inherit              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
 320 overwrite               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
 321 no-overwrite            { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
 322 percore                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
 323 aux-output              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
 324 aux-sample-size         { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
 325 metric-id               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); }
 326 cpu-cycles|cycles                               { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); }
 327 stalled-cycles-frontend|idle-cycles-frontend    { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 328 stalled-cycles-backend|idle-cycles-backend      { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
 329 instructions                                    { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); }
 330 cache-references                                { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); }
 331 cache-misses                                    { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); }
 332 branch-instructions|branches                    { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
 333 branch-misses                                   { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); }
 334 bus-cycles                                      { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); }
 335 ref-cycles                                      { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); }
 336 r{num_raw_hex}          { return str(yyscanner, PE_RAW); }
 337 r0x{num_raw_hex}        { return str(yyscanner, PE_RAW); }
 338 ,                       { return ','; }
 339 "/"                     { BEGIN(INITIAL); return '/'; }
 340 {lc_type}                       { return lc_str(yyscanner, _parse_state); }
 341 {lc_type}-{lc_op_result}        { return lc_str(yyscanner, _parse_state); }
 342 {lc_type}-{lc_op_result}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }
 343 {name_minus}            { return str(yyscanner, PE_NAME); }
 344 @{drv_cfg_term}         { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
 345 }
 346
 347 <mem>{
 348 {modifier_bp}           { return str(yyscanner, PE_MODIFIER_BP); }
 349         /*
 350          * The colon before memory access modifiers can get mixed up with the
 351          * colon before event modifiers. Fortunately none of the option letters
 352          * are the same, so trailing context can be used disambiguate the two
 353          * cases.
 354          */
 355 ":"/{modifier_bp}       { return PE_BP_COLON; }
 356         /*
 357          * The slash before memory length can get mixed up with the slash before
 358          * config terms. Fortunately config terms do not start with a numeric
 359          * digit, so trailing context can be used disambiguate the two cases.
 360          */
 361 "/"/{digit}             { return PE_BP_SLASH; }
 362 "/"/{non_digit}         { BEGIN(config); return '/'; }
 363 {num_dec}               { return value(_parse_state, yyscanner, 10); }
 364 {num_hex}               { return value(_parse_state, yyscanner, 16); }
 365         /*
 366          * We need to separate 'mem:' scanner part, in order to get specific
 367          * modifier bits parsed out. Otherwise we would need to handle PE_NAME
 368          * and we'd need to parse it manually. During the escape from <mem>
 369          * state we need to put the escaping char back, so we dont miss it.
 370          */
 371 .                       { unput(*yytext); BEGIN(INITIAL); }
 372         /*
 373          * We destroy the scanner after reaching EOF,
 374          * but anyway just to be sure get back to INIT state.
 375          */
 376 <<EOF>>                 { BEGIN(INITIAL); }
 377 }
 378
 379 cpu-cycles|cycles                               { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
 380 stalled-cycles-frontend|idle-cycles-frontend    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 381 stalled-cycles-backend|idle-cycles-backend      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
 382 instructions                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
 383 cache-references                                { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
 384 cache-misses                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
 385 branch-instructions|branches                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
 386 branch-misses                                   { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
 387 bus-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
 388 ref-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
 389 cpu-clock                                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
 390 task-clock                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
 391 page-faults|faults                              { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
 392 minor-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
 393 major-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
 394 context-switches|cs                             { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
 395 cpu-migrations|migrations                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
 396 alignment-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
 397 emulation-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
 398 dummy                                           { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
 399 bpf-output                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
 400 cgroup-switches                                 { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); }
 401
 402 {lc_type}                       { return str(yyscanner, PE_LEGACY_CACHE); }
 403 {lc_type}-{lc_op_result}        { return str(yyscanner, PE_LEGACY_CACHE); }
 404 {lc_type}-{lc_op_result}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }
 405 mem:                    { BEGIN(mem); return PE_PREFIX_MEM; }
 406 r{num_raw_hex}          { return str(yyscanner, PE_RAW); }
 407 {num_dec}               { return value(_parse_state, yyscanner, 10); }
 408 {num_hex}               { return value(_parse_state, yyscanner, 16); }
 409
 410 {modifier_event}        { return modifiers(_parse_state, yyscanner); }
 411 {name}                  { return str(yyscanner, PE_NAME); }
 412 {name_tag}              { return str(yyscanner, PE_NAME); }
 413 "/"                     { BEGIN(config); return '/'; }
 414 ,                       { BEGIN(event); return ','; }
 415 :                       { return ':'; }
 416 "{"                     { BEGIN(event); return '{'; }
 417 "}"                     { return '}'; }
 418 =                       { return '='; }
 419 \n                      { }
 420 .                       { }
 421
 422 %%
 423
 424 int parse_events_wrap(void *scanner __maybe_unused)
 425 {
 426         return 1;
 427 }