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 #include "evsel.h" 19 20 char *parse_events_get_text(yyscan_t yyscanner); 21 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner); 22 23 static int __value(YYSTYPE *yylval, char *str, int base, int token) 24 { 25 u64 num; 26 27 errno = 0; 28 num = strtoull(str, NULL, base); 29 if (errno) 30 return PE_ERROR; 31 32 yylval->num = num; 33 return token; 34 } 35 36 static int value(yyscan_t scanner, int base) 37 { 38 YYSTYPE *yylval = parse_events_get_lval(scanner); 39 char *text = parse_events_get_text(scanner); 40 41 return __value(yylval, text, base, PE_VALUE); 42 } 43 44 static int raw(yyscan_t scanner) 45 { 46 YYSTYPE *yylval = parse_events_get_lval(scanner); 47 char *text = parse_events_get_text(scanner); 48 49 return __value(yylval, text + 1, 16, PE_RAW); 50 } 51 52 static int str(yyscan_t scanner, int token) 53 { 54 YYSTYPE *yylval = parse_events_get_lval(scanner); 55 char *text = parse_events_get_text(scanner); 56 57 if (text[0] != '\'') { 58 yylval->str = strdup(text); 59 } else { 60 /* 61 * If a text tag specified on the command line 62 * contains opening single quite ' then it is 63 * expected that the tag ends with single quote 64 * as well, like this: 65 * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\' 66 * quotes need to be escaped to bypass shell 67 * processing. 68 */ 69 yylval->str = strndup(&text[1], strlen(text) - 2); 70 } 71 72 return token; 73 } 74 75 static bool isbpf_suffix(char *text) 76 { 77 int len = strlen(text); 78 79 if (len < 2) 80 return false; 81 if ((text[len - 1] == 'c' || text[len - 1] == 'o') && 82 text[len - 2] == '.') 83 return true; 84 if (len > 4 && !strcmp(text + len - 4, ".obj")) 85 return true; 86 return false; 87 } 88 89 static bool isbpf(yyscan_t scanner) 90 { 91 char *text = parse_events_get_text(scanner); 92 struct stat st; 93 94 if (!isbpf_suffix(text)) 95 return false; 96 97 return stat(text, &st) == 0; 98 } 99 100 /* 101 * This function is called when the parser gets two kind of input: 102 * 103 * @cfg1 or @cfg2=config 104 * 105 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to 106 * bison. In the latter case it is necessary to keep the string intact so that 107 * the PMU kernel driver can determine what configurable is associated to 108 * 'config'. 109 */ 110 static int drv_str(yyscan_t scanner, int token) 111 { 112 YYSTYPE *yylval = parse_events_get_lval(scanner); 113 char *text = parse_events_get_text(scanner); 114 115 /* Strip off the '@' */ 116 yylval->str = strdup(text + 1); 117 return token; 118 } 119 120 #define REWIND(__alloc) \ 121 do { \ 122 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \ 123 char *text = parse_events_get_text(yyscanner); \ 124 \ 125 if (__alloc) \ 126 __yylval->str = strdup(text); \ 127 \ 128 yycolumn -= strlen(text); \ 129 yyless(0); \ 130 } while (0) 131 132 static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_state) 133 { 134 YYSTYPE *yylval = parse_events_get_lval(scanner); 135 char *text = parse_events_get_text(scanner); 136 137 yylval->str = strdup(text); 138 139 if (parse_state->fake_pmu) 140 return PE_PMU_EVENT_FAKE; 141 142 switch (perf_pmu__parse_check(text)) { 143 case PMU_EVENT_SYMBOL_PREFIX: 144 return PE_PMU_EVENT_PRE; 145 case PMU_EVENT_SYMBOL_SUFFIX: 146 return PE_PMU_EVENT_SUF; 147 case PMU_EVENT_SYMBOL: 148 return PE_KERNEL_PMU_EVENT; 149 default: 150 return PE_NAME; 151 } 152 } 153 154 static int sym(yyscan_t scanner, int type, int config) 155 { 156 YYSTYPE *yylval = parse_events_get_lval(scanner); 157 158 yylval->num = (type << 16) + config; 159 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; 160 } 161 162 static int tool(yyscan_t scanner, enum perf_tool_event event) 163 { 164 YYSTYPE *yylval = parse_events_get_lval(scanner); 165 166 yylval->num = event; 167 return PE_VALUE_SYM_TOOL; 168 } 169 170 static int term(yyscan_t scanner, int type) 171 { 172 YYSTYPE *yylval = parse_events_get_lval(scanner); 173 174 yylval->num = type; 175 return PE_TERM; 176 } 177 178 #define YY_USER_ACTION \ 179 do { \ 180 yylloc->last_column = yylloc->first_column; \ 181 yylloc->first_column = yycolumn; \ 182 yycolumn += yyleng; \ 183 } while (0); 184 185 #define USER_REJECT \ 186 yycolumn -= yyleng; \ 187 REJECT 188 189 %} 190 191 %x mem 192 %s config 193 %x event 194 %x array 195 196 group [^,{}/]*[{][^}]*[}][^,{}/]* 197 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]* 198 event [^,{}/]+ 199 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]* 200 bpf_source [^,{}]+\.c[a-zA-Z0-9._]* 201 202 num_dec [0-9]+ 203 num_hex 0x[a-fA-F0-9]+ 204 num_raw_hex [a-fA-F0-9]+ 205 name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]* 206 name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\'] 207 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]* 208 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)? 209 /* If you add a modifier you need to update check_modifier() */ 210 modifier_event [ukhpPGHSDIW]+ 211 modifier_bp [rwx]{1,3} 212 213 %% 214 215 %{ 216 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner); 217 218 { 219 int start_token = _parse_state->stoken; 220 221 if (start_token == PE_START_TERMS) 222 BEGIN(config); 223 else if (start_token == PE_START_EVENTS) 224 BEGIN(event); 225 226 if (start_token) { 227 _parse_state->stoken = 0; 228 /* 229 * The flex parser does not init locations variable 230 * via the scan_string interface, so we need do the 231 * init in here. 232 */ 233 yycolumn = 0; 234 return start_token; 235 } 236 } 237 %} 238 239 <event>{ 240 241 {group} { 242 BEGIN(INITIAL); 243 REWIND(0); 244 } 245 246 {event_pmu} | 247 {bpf_object} | 248 {bpf_source} | 249 {event} { 250 BEGIN(INITIAL); 251 REWIND(1); 252 return PE_EVENT_NAME; 253 } 254 255 <<EOF>> { 256 BEGIN(INITIAL); 257 REWIND(0); 258 } 259 , { 260 return ','; 261 } 262 } 263 264 <array>{ 265 "]" { BEGIN(config); return ']'; } 266 {num_dec} { return value(yyscanner, 10); } 267 {num_hex} { return value(yyscanner, 16); } 268 , { return ','; } 269 "\.\.\." { return PE_ARRAY_RANGE; } 270 } 271 272 <config>{ 273 /* 274 * Please update config_term_names when new static term is added. 275 */ 276 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } 277 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); } 278 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); } 279 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); } 280 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); } 281 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); } 282 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); } 283 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); } 284 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); } 285 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); } 286 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); } 287 nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); } 288 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); } 289 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); } 290 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); } 291 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); } 292 percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); } 293 aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } 294 aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); } 295 r{num_raw_hex} { return raw(yyscanner); } 296 , { return ','; } 297 "/" { BEGIN(INITIAL); return '/'; } 298 {name_minus} { return str(yyscanner, PE_NAME); } 299 \[all\] { return PE_ARRAY_ALL; } 300 "[" { BEGIN(array); return '['; } 301 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); } 302 } 303 304 <mem>{ 305 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); } 306 : { return ':'; } 307 "/" { return '/'; } 308 {num_dec} { return value(yyscanner, 10); } 309 {num_hex} { return value(yyscanner, 16); } 310 /* 311 * We need to separate 'mem:' scanner part, in order to get specific 312 * modifier bits parsed out. Otherwise we would need to handle PE_NAME 313 * and we'd need to parse it manually. During the escape from <mem> 314 * state we need to put the escaping char back, so we dont miss it. 315 */ 316 . { unput(*yytext); BEGIN(INITIAL); } 317 /* 318 * We destroy the scanner after reaching EOF, 319 * but anyway just to be sure get back to INIT state. 320 */ 321 <<EOF>> { BEGIN(INITIAL); } 322 } 323 324 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } 325 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 326 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 327 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } 328 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } 329 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } 330 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 331 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } 332 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } 333 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } 334 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } 335 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } 336 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } 337 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } 338 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } 339 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } 340 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } 341 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } 342 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } 343 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } 344 duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); } 345 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } 346 347 /* 348 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately. 349 * Because the prefix cycles is mixed up with cpu-cycles. 350 * loads and stores are mixed up with cache event 351 */ 352 cycles-ct | 353 cycles-t | 354 mem-loads | 355 mem-stores | 356 topdown-[a-z-]+ | 357 tx-capacity-[a-z-]+ | 358 el-capacity-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 359 360 L1-dcache|l1-d|l1d|L1-data | 361 L1-icache|l1-i|l1i|L1-instruction | 362 LLC|L2 | 363 dTLB|d-tlb|Data-TLB | 364 iTLB|i-tlb|Instruction-TLB | 365 branch|branches|bpu|btb|bpc | 366 node { return str(yyscanner, PE_NAME_CACHE_TYPE); } 367 368 load|loads|read | 369 store|stores|write | 370 prefetch|prefetches | 371 speculative-read|speculative-load | 372 refs|Reference|ops|access | 373 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); } 374 375 mem: { BEGIN(mem); return PE_PREFIX_MEM; } 376 r{num_raw_hex} { return raw(yyscanner); } 377 {num_dec} { return value(yyscanner, 10); } 378 {num_hex} { return value(yyscanner, 16); } 379 380 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); } 381 {bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); } 382 {bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); } 383 {name} { return pmu_str_check(yyscanner, _parse_state); } 384 {name_tag} { return str(yyscanner, PE_NAME); } 385 "/" { BEGIN(config); return '/'; } 386 - { return '-'; } 387 , { BEGIN(event); return ','; } 388 : { return ':'; } 389 "{" { BEGIN(event); return '{'; } 390 "}" { return '}'; } 391 = { return '='; } 392 \n { } 393 . { } 394 395 %% 396 397 int parse_events_wrap(void *scanner __maybe_unused) 398 { 399 return 1; 400 } 401