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 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 str(yyscan_t scanner, int token) 44 { 45 YYSTYPE *yylval = parse_events_get_lval(scanner); 46 char *text = parse_events_get_text(scanner); 47 48 if (text[0] != '\'') { 49 yylval->str = strdup(text); 50 } else { 51 /* 52 * If a text tag specified on the command line 53 * contains opening single quite ' then it is 54 * expected that the tag ends with single quote 55 * as well, like this: 56 * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\' 57 * quotes need to be escaped to bypass shell 58 * processing. 59 */ 60 yylval->str = strndup(&text[1], strlen(text) - 2); 61 } 62 63 return token; 64 } 65 66 static int raw(yyscan_t scanner) 67 { 68 YYSTYPE *yylval = parse_events_get_lval(scanner); 69 char *text = parse_events_get_text(scanner); 70 71 if (perf_pmu__parse_check(text) == PMU_EVENT_SYMBOL) 72 return str(scanner, PE_NAME); 73 74 return __value(yylval, text + 1, 16, PE_RAW); 75 } 76 77 static bool isbpf_suffix(char *text) 78 { 79 int len = strlen(text); 80 81 if (len < 2) 82 return false; 83 if ((text[len - 1] == 'c' || text[len - 1] == 'o') && 84 text[len - 2] == '.') 85 return true; 86 if (len > 4 && !strcmp(text + len - 4, ".obj")) 87 return true; 88 return false; 89 } 90 91 static bool isbpf(yyscan_t scanner) 92 { 93 char *text = parse_events_get_text(scanner); 94 struct stat st; 95 96 if (!isbpf_suffix(text)) 97 return false; 98 99 return stat(text, &st) == 0; 100 } 101 102 /* 103 * This function is called when the parser gets two kind of input: 104 * 105 * @cfg1 or @cfg2=config 106 * 107 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to 108 * bison. In the latter case it is necessary to keep the string intact so that 109 * the PMU kernel driver can determine what configurable is associated to 110 * 'config'. 111 */ 112 static int drv_str(yyscan_t scanner, int token) 113 { 114 YYSTYPE *yylval = parse_events_get_lval(scanner); 115 char *text = parse_events_get_text(scanner); 116 117 /* Strip off the '@' */ 118 yylval->str = strdup(text + 1); 119 return token; 120 } 121 122 #define REWIND(__alloc) \ 123 do { \ 124 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \ 125 char *text = parse_events_get_text(yyscanner); \ 126 \ 127 if (__alloc) \ 128 __yylval->str = strdup(text); \ 129 \ 130 yycolumn -= strlen(text); \ 131 yyless(0); \ 132 } while (0) 133 134 static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_state) 135 { 136 YYSTYPE *yylval = parse_events_get_lval(scanner); 137 char *text = parse_events_get_text(scanner); 138 139 yylval->str = strdup(text); 140 141 /* 142 * If we're not testing then parse check determines the PMU event type 143 * which if it isn't a PMU returns PE_NAME. When testing the result of 144 * parse check can't be trusted so we return PE_PMU_EVENT_FAKE unless 145 * an '!' is present in which case the text can't be a PMU name. 146 */ 147 switch (perf_pmu__parse_check(text)) { 148 case PMU_EVENT_SYMBOL_PREFIX: 149 return PE_PMU_EVENT_PRE; 150 case PMU_EVENT_SYMBOL_SUFFIX: 151 return PE_PMU_EVENT_SUF; 152 case PMU_EVENT_SYMBOL: 153 return parse_state->fake_pmu 154 ? PE_PMU_EVENT_FAKE : PE_KERNEL_PMU_EVENT; 155 default: 156 return parse_state->fake_pmu && !strchr(text,'!') 157 ? PE_PMU_EVENT_FAKE : PE_NAME; 158 } 159 } 160 161 static int sym(yyscan_t scanner, int type, int config) 162 { 163 YYSTYPE *yylval = parse_events_get_lval(scanner); 164 165 yylval->num = (type << 16) + config; 166 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; 167 } 168 169 static int tool(yyscan_t scanner, enum perf_tool_event event) 170 { 171 YYSTYPE *yylval = parse_events_get_lval(scanner); 172 173 yylval->num = event; 174 return PE_VALUE_SYM_TOOL; 175 } 176 177 static int term(yyscan_t scanner, int type) 178 { 179 YYSTYPE *yylval = parse_events_get_lval(scanner); 180 181 yylval->num = type; 182 return PE_TERM; 183 } 184 185 #define YY_USER_ACTION \ 186 do { \ 187 yylloc->last_column = yylloc->first_column; \ 188 yylloc->first_column = yycolumn; \ 189 yycolumn += yyleng; \ 190 } while (0); 191 192 #define USER_REJECT \ 193 yycolumn -= yyleng; \ 194 REJECT 195 196 %} 197 198 %x mem 199 %s config 200 %x event 201 %x array 202 203 group [^,{}/]*[{][^}]*[}][^,{}/]* 204 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]* 205 event [^,{}/]+ 206 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]* 207 bpf_source [^,{}]+\.c[a-zA-Z0-9._]* 208 209 num_dec [0-9]+ 210 num_hex 0x[a-fA-F0-9]+ 211 num_raw_hex [a-fA-F0-9]+ 212 name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]!]* 213 name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\'] 214 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]* 215 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)? 216 /* If you add a modifier you need to update check_modifier() */ 217 modifier_event [ukhpPGHSDIWeb]+ 218 modifier_bp [rwx]{1,3} 219 220 %% 221 222 %{ 223 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner); 224 225 { 226 int start_token = _parse_state->stoken; 227 228 if (start_token == PE_START_TERMS) 229 BEGIN(config); 230 else if (start_token == PE_START_EVENTS) 231 BEGIN(event); 232 233 if (start_token) { 234 _parse_state->stoken = 0; 235 /* 236 * The flex parser does not init locations variable 237 * via the scan_string interface, so we need do the 238 * init in here. 239 */ 240 yycolumn = 0; 241 return start_token; 242 } 243 } 244 %} 245 246 <event>{ 247 248 {group} { 249 BEGIN(INITIAL); 250 REWIND(0); 251 } 252 253 {event_pmu} | 254 {bpf_object} | 255 {bpf_source} | 256 {event} { 257 BEGIN(INITIAL); 258 REWIND(1); 259 return PE_EVENT_NAME; 260 } 261 262 <<EOF>> { 263 BEGIN(INITIAL); 264 REWIND(0); 265 } 266 , { 267 return ','; 268 } 269 } 270 271 <array>{ 272 "]" { BEGIN(config); return ']'; } 273 {num_dec} { return value(yyscanner, 10); } 274 {num_hex} { return value(yyscanner, 16); } 275 , { return ','; } 276 "\.\.\." { return PE_ARRAY_RANGE; } 277 } 278 279 <config>{ 280 /* 281 * Please update config_term_names when new static term is added. 282 */ 283 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } 284 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); } 285 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); } 286 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); } 287 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); } 288 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); } 289 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); } 290 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); } 291 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); } 292 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); } 293 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); } 294 nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); } 295 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); } 296 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); } 297 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); } 298 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); } 299 percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); } 300 aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } 301 aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); } 302 metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); } 303 r{num_raw_hex} { return raw(yyscanner); } 304 r0x{num_raw_hex} { return raw(yyscanner); } 305 , { return ','; } 306 "/" { BEGIN(INITIAL); return '/'; } 307 {name_minus} { return str(yyscanner, PE_NAME); } 308 \[all\] { return PE_ARRAY_ALL; } 309 "[" { BEGIN(array); return '['; } 310 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); } 311 } 312 313 <mem>{ 314 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); } 315 : { return ':'; } 316 "/" { return '/'; } 317 {num_dec} { return value(yyscanner, 10); } 318 {num_hex} { return value(yyscanner, 16); } 319 /* 320 * We need to separate 'mem:' scanner part, in order to get specific 321 * modifier bits parsed out. Otherwise we would need to handle PE_NAME 322 * and we'd need to parse it manually. During the escape from <mem> 323 * state we need to put the escaping char back, so we dont miss it. 324 */ 325 . { unput(*yytext); BEGIN(INITIAL); } 326 /* 327 * We destroy the scanner after reaching EOF, 328 * but anyway just to be sure get back to INIT state. 329 */ 330 <<EOF>> { BEGIN(INITIAL); } 331 } 332 333 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } 334 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 335 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 336 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } 337 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } 338 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } 339 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 340 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } 341 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } 342 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } 343 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } 344 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } 345 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } 346 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } 347 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } 348 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } 349 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } 350 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } 351 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } 352 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } 353 duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); } 354 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } 355 cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); } 356 357 /* 358 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately. 359 * Because the prefix cycles is mixed up with cpu-cycles. 360 * loads and stores are mixed up with cache event 361 */ 362 cycles-ct | 363 cycles-t | 364 mem-loads | 365 mem-loads-aux | 366 mem-stores | 367 topdown-[a-z-]+ | 368 tx-capacity-[a-z-]+ | 369 el-capacity-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 370 371 L1-dcache|l1-d|l1d|L1-data | 372 L1-icache|l1-i|l1i|L1-instruction | 373 LLC|L2 | 374 dTLB|d-tlb|Data-TLB | 375 iTLB|i-tlb|Instruction-TLB | 376 branch|branches|bpu|btb|bpc | 377 node { return str(yyscanner, PE_NAME_CACHE_TYPE); } 378 379 load|loads|read | 380 store|stores|write | 381 prefetch|prefetches | 382 speculative-read|speculative-load | 383 refs|Reference|ops|access | 384 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); } 385 386 mem: { BEGIN(mem); return PE_PREFIX_MEM; } 387 r{num_raw_hex} { return raw(yyscanner); } 388 {num_dec} { return value(yyscanner, 10); } 389 {num_hex} { return value(yyscanner, 16); } 390 391 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); } 392 {bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); } 393 {bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); } 394 {name} { return pmu_str_check(yyscanner, _parse_state); } 395 {name_tag} { return str(yyscanner, PE_NAME); } 396 "/" { BEGIN(config); return '/'; } 397 - { return '-'; } 398 , { BEGIN(event); return ','; } 399 : { return ':'; } 400 "{" { BEGIN(event); return '{'; } 401 "}" { return '}'; } 402 = { return '='; } 403 \n { } 404 . { } 405 406 %% 407 408 int parse_events_wrap(void *scanner __maybe_unused) 409 { 410 return 1; 411 } 412