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 "../perf.h"
  16 #include "parse-events.h"
  17 #include "parse-events-bison.h"
  18
  19 char *parse_events_get_text(yyscan_t yyscanner);
  20 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
  21
  22 static int __value(YYSTYPE *yylval, char *str, int base, int token)
  23 {
  24         u64 num;
  25
  26         errno = 0;
  27         num = strtoull(str, NULL, base);
  28         if (errno)
  29                 return PE_ERROR;
  30
  31         yylval->num = num;
  32         return token;
  33 }
  34
  35 static int value(yyscan_t scanner, int base)
  36 {
  37         YYSTYPE *yylval = parse_events_get_lval(scanner);
  38         char *text = parse_events_get_text(scanner);
  39
  40         return __value(yylval, text, base, PE_VALUE);
  41 }
  42
  43 static int raw(yyscan_t scanner)
  44 {
  45         YYSTYPE *yylval = parse_events_get_lval(scanner);
  46         char *text = parse_events_get_text(scanner);
  47
  48         return __value(yylval, text + 1, 16, PE_RAW);
  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         yylval->str = strdup(text);
  57         return token;
  58 }
  59
  60 static bool isbpf_suffix(char *text)
  61 {
  62         int len = strlen(text);
  63
  64         if (len < 2)
  65                 return false;
  66         if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
  67             text[len - 2] == '.')
  68                 return true;
  69         if (len > 4 && !strcmp(text + len - 4, ".obj"))
  70                 return true;
  71         return false;
  72 }
  73
  74 static bool isbpf(yyscan_t scanner)
  75 {
  76         char *text = parse_events_get_text(scanner);
  77         struct stat st;
  78
  79         if (!isbpf_suffix(text))
  80                 return false;
  81
  82         return stat(text, &st) == 0;
  83 }
  84
  85 /*
  86  * This function is called when the parser gets two kind of input:
  87  *
  88  *      @cfg1 or @cfg2=config
  89  *
  90  * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
  91  * bison.  In the latter case it is necessary to keep the string intact so that
  92  * the PMU kernel driver can determine what configurable is associated to
  93  * 'config'.
  94  */
  95 static int drv_str(yyscan_t scanner, int token)
  96 {
  97         YYSTYPE *yylval = parse_events_get_lval(scanner);
  98         char *text = parse_events_get_text(scanner);
  99
 100         /* Strip off the '@' */
 101         yylval->str = strdup(text + 1);
 102         return token;
 103 }
 104
 105 #define REWIND(__alloc)                         \
 106 do {                                                            \
 107         YYSTYPE *__yylval = parse_events_get_lval(yyscanner);   \
 108         char *text = parse_events_get_text(yyscanner);          \
 109                                                                 \
 110         if (__alloc)                                            \
 111                 __yylval->str = strdup(text);                   \
 112                                                                 \
 113         yycolumn -= strlen(text);                               \
 114         yyless(0);                                              \
 115 } while (0)
 116
 117 static int pmu_str_check(yyscan_t scanner)
 118 {
 119         YYSTYPE *yylval = parse_events_get_lval(scanner);
 120         char *text = parse_events_get_text(scanner);
 121
 122         yylval->str = strdup(text);
 123         switch (perf_pmu__parse_check(text)) {
 124                 case PMU_EVENT_SYMBOL_PREFIX:
 125                         return PE_PMU_EVENT_PRE;
 126                 case PMU_EVENT_SYMBOL_SUFFIX:
 127                         return PE_PMU_EVENT_SUF;
 128                 case PMU_EVENT_SYMBOL:
 129                         return PE_KERNEL_PMU_EVENT;
 130                 default:
 131                         return PE_NAME;
 132         }
 133 }
 134
 135 static int sym(yyscan_t scanner, int type, int config)
 136 {
 137         YYSTYPE *yylval = parse_events_get_lval(scanner);
 138
 139         yylval->num = (type << 16) + config;
 140         return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
 141 }
 142
 143 static int term(yyscan_t scanner, int type)
 144 {
 145         YYSTYPE *yylval = parse_events_get_lval(scanner);
 146
 147         yylval->num = type;
 148         return PE_TERM;
 149 }
 150
 151 #define YY_USER_ACTION                                  \
 152 do {                                                    \
 153         yylloc->last_column  = yylloc->first_column;    \
 154         yylloc->first_column = yycolumn;                \
 155         yycolumn += yyleng;                             \
 156 } while (0);
 157
 158 #define USER_REJECT             \
 159         yycolumn -= yyleng;     \
 160         REJECT
 161
 162 %}
 163
 164 %x mem
 165 %s config
 166 %x event
 167 %x array
 168
 169 group           [^,{}/]*[{][^}]*[}][^,{}/]*
 170 event_pmu       [^,{}/]+[/][^/]*[/][^,{}/]*
 171 event           [^,{}/]+
 172 bpf_object      [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
 173 bpf_source      [^,{}]+\.c[a-zA-Z0-9._]*
 174
 175 num_dec         [0-9]+
 176 num_hex         0x[a-fA-F0-9]+
 177 num_raw_hex     [a-fA-F0-9]+
 178 name            [a-zA-Z_*?][a-zA-Z0-9_*?.]*
 179 name_minus      [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
 180 drv_cfg_term    [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
 181 /* If you add a modifier you need to update check_modifier() */
 182 modifier_event  [ukhpPGHSDI]+
 183 modifier_bp     [rwx]{1,3}
 184
 185 %%
 186
 187 %{
 188         {
 189                 int start_token;
 190
 191                 start_token = parse_events_get_extra(yyscanner);
 192
 193                 if (start_token == PE_START_TERMS)
 194                         BEGIN(config);
 195                 else if (start_token == PE_START_EVENTS)
 196                         BEGIN(event);
 197
 198                 if (start_token) {
 199                         parse_events_set_extra(NULL, yyscanner);
 200                         /*
 201                          * The flex parser does not init locations variable
 202                          * via the scan_string interface, so we need do the
 203                          * init in here.
 204                          */
 205                         yycolumn = 0;
 206                         return start_token;
 207                 }
 208          }
 209 %}
 210
 211 <event>{
 212
 213 {group}         {
 214                         BEGIN(INITIAL);
 215                         REWIND(0);
 216                 }
 217
 218 {event_pmu}     |
 219 {bpf_object}    |
 220 {bpf_source}    |
 221 {event}         {
 222                         BEGIN(INITIAL);
 223                         REWIND(1);
 224                         return PE_EVENT_NAME;
 225                 }
 226
 227 <<EOF>>         {
 228                         BEGIN(INITIAL);
 229                         REWIND(0);
 230                 }
 231
 232 }
 233
 234 <array>{
 235 "]"                     { BEGIN(config); return ']'; }
 236 {num_dec}               { return value(yyscanner, 10); }
 237 {num_hex}               { return value(yyscanner, 16); }
 238 ,                       { return ','; }
 239 "\.\.\."                { return PE_ARRAY_RANGE; }
 240 }
 241
 242 <config>{
 243         /*
 244          * Please update config_term_names when new static term is added.
 245          */
 246 config                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
 247 config1                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
 248 config2                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
 249 name                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
 250 period                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
 251 freq                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
 252 branch_type             { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
 253 time                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
 254 call-graph              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
 255 stack-size              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
 256 max-stack               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
 257 inherit                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
 258 no-inherit              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
 259 overwrite               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
 260 no-overwrite            { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
 261 ,                       { return ','; }
 262 "/"                     { BEGIN(INITIAL); return '/'; }
 263 {name_minus}            { return str(yyscanner, PE_NAME); }
 264 \[all\]                 { return PE_ARRAY_ALL; }
 265 "["                     { BEGIN(array); return '['; }
 266 @{drv_cfg_term}         { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
 267 }
 268
 269 <mem>{
 270 {modifier_bp}           { return str(yyscanner, PE_MODIFIER_BP); }
 271 :                       { return ':'; }
 272 "/"                     { return '/'; }
 273 {num_dec}               { return value(yyscanner, 10); }
 274 {num_hex}               { return value(yyscanner, 16); }
 275         /*
 276          * We need to separate 'mem:' scanner part, in order to get specific
 277          * modifier bits parsed out. Otherwise we would need to handle PE_NAME
 278          * and we'd need to parse it manually. During the escape from <mem>
 279          * state we need to put the escaping char back, so we dont miss it.
 280          */
 281 .                       { unput(*yytext); BEGIN(INITIAL); }
 282         /*
 283          * We destroy the scanner after reaching EOF,
 284          * but anyway just to be sure get back to INIT state.
 285          */
 286 <<EOF>>                 { BEGIN(INITIAL); }
 287 }
 288
 289 cpu-cycles|cycles                               { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
 290 stalled-cycles-frontend|idle-cycles-frontend    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 291 stalled-cycles-backend|idle-cycles-backend      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
 292 instructions                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
 293 cache-references                                { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
 294 cache-misses                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
 295 branch-instructions|branches                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
 296 branch-misses                                   { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
 297 bus-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
 298 ref-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
 299 cpu-clock                                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
 300 task-clock                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
 301 page-faults|faults                              { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
 302 minor-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
 303 major-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
 304 context-switches|cs                             { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
 305 cpu-migrations|migrations                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
 306 alignment-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
 307 emulation-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
 308 dummy                                           { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
 309 bpf-output                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
 310
 311         /*
 312          * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
 313          * Because the prefix cycles is mixed up with cpu-cycles.
 314          * loads and stores are mixed up with cache event
 315          */
 316 cycles-ct                                       { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 317 cycles-t                                        { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 318 mem-loads                                       { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 319 mem-stores                                      { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 320 topdown-[a-z-]+                                 { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
 321
 322 L1-dcache|l1-d|l1d|L1-data              |
 323 L1-icache|l1-i|l1i|L1-instruction       |
 324 LLC|L2                                  |
 325 dTLB|d-tlb|Data-TLB                     |
 326 iTLB|i-tlb|Instruction-TLB              |
 327 branch|branches|bpu|btb|bpc             |
 328 node                                    { return str(yyscanner, PE_NAME_CACHE_TYPE); }
 329
 330 load|loads|read                         |
 331 store|stores|write                      |
 332 prefetch|prefetches                     |
 333 speculative-read|speculative-load       |
 334 refs|Reference|ops|access               |
 335 misses|miss                             { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
 336
 337 mem:                    { BEGIN(mem); return PE_PREFIX_MEM; }
 338 r{num_raw_hex}          { return raw(yyscanner); }
 339 {num_dec}               { return value(yyscanner, 10); }
 340 {num_hex}               { return value(yyscanner, 16); }
 341
 342 {modifier_event}        { return str(yyscanner, PE_MODIFIER_EVENT); }
 343 {bpf_object}            { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
 344 {bpf_source}            { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
 345 {name}                  { return pmu_str_check(yyscanner); }
 346 "/"                     { BEGIN(config); return '/'; }
 347 -                       { return '-'; }
 348 ,                       { BEGIN(event); return ','; }
 349 :                       { return ':'; }
 350 "{"                     { BEGIN(event); return '{'; }
 351 "}"                     { return '}'; }
 352 =                       { return '='; }
 353 \n                      { }
 354 .                       { }
 355
 356 %%
 357
 358 int parse_events_wrap(void *scanner __maybe_unused)
 359 {
 360         return 1;
 361 }