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 lc_str(yyscan_t scanner, const struct parse_events_state *state) 67 { 68 return str(scanner, state->match_legacy_cache_terms ? PE_LEGACY_CACHE : PE_NAME); 69 } 70 71 static bool isbpf_suffix(char *text) 72 { 73 int len = strlen(text); 74 75 if (len < 2) 76 return false; 77 if ((text[len - 1] == 'c' || text[len - 1] == 'o') && 78 text[len - 2] == '.') 79 return true; 80 if (len > 4 && !strcmp(text + len - 4, ".obj")) 81 return true; 82 return false; 83 } 84 85 static bool isbpf(yyscan_t scanner) 86 { 87 char *text = parse_events_get_text(scanner); 88 struct stat st; 89 90 if (!isbpf_suffix(text)) 91 return false; 92 93 return stat(text, &st) == 0; 94 } 95 96 /* 97 * This function is called when the parser gets two kind of input: 98 * 99 * @cfg1 or @cfg2=config 100 * 101 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to 102 * bison. In the latter case it is necessary to keep the string intact so that 103 * the PMU kernel driver can determine what configurable is associated to 104 * 'config'. 105 */ 106 static int drv_str(yyscan_t scanner, int token) 107 { 108 YYSTYPE *yylval = parse_events_get_lval(scanner); 109 char *text = parse_events_get_text(scanner); 110 111 /* Strip off the '@' */ 112 yylval->str = strdup(text + 1); 113 return token; 114 } 115 116 #define REWIND(__alloc) \ 117 do { \ 118 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \ 119 char *text = parse_events_get_text(yyscanner); \ 120 \ 121 if (__alloc) \ 122 __yylval->str = strdup(text); \ 123 \ 124 yycolumn -= strlen(text); \ 125 yyless(0); \ 126 } while (0) 127 128 static int sym(yyscan_t scanner, int type, int config) 129 { 130 YYSTYPE *yylval = parse_events_get_lval(scanner); 131 132 yylval->num = (type << 16) + config; 133 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; 134 } 135 136 static int tool(yyscan_t scanner, enum perf_tool_event event) 137 { 138 YYSTYPE *yylval = parse_events_get_lval(scanner); 139 140 yylval->num = event; 141 return PE_VALUE_SYM_TOOL; 142 } 143 144 static int term(yyscan_t scanner, int type) 145 { 146 YYSTYPE *yylval = parse_events_get_lval(scanner); 147 148 yylval->num = type; 149 return PE_TERM; 150 } 151 152 static int hw_term(yyscan_t scanner, int config) 153 { 154 YYSTYPE *yylval = parse_events_get_lval(scanner); 155 char *text = parse_events_get_text(scanner); 156 157 yylval->hardware_term.str = strdup(text); 158 yylval->hardware_term.num = PERF_TYPE_HARDWARE + config; 159 return PE_TERM_HW; 160 } 161 162 #define YY_USER_ACTION \ 163 do { \ 164 yylloc->last_column = yylloc->first_column; \ 165 yylloc->first_column = yycolumn; \ 166 yycolumn += yyleng; \ 167 } while (0); 168 169 #define USER_REJECT \ 170 yycolumn -= yyleng; \ 171 REJECT 172 173 %} 174 175 %x mem 176 %s config 177 %x event 178 %x array 179 180 group [^,{}/]*[{][^}]*[}][^,{}/]* 181 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]* 182 event [^,{}/]+ 183 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]* 184 bpf_source [^,{}]+\.c[a-zA-Z0-9._]* 185 186 num_dec [0-9]+ 187 num_hex 0x[a-fA-F0-9]+ 188 num_raw_hex [a-fA-F0-9]+ 189 name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]* 190 name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\'] 191 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]* 192 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)? 193 /* 194 * If you add a modifier you need to update check_modifier(). 195 * Also, the letters in modifier_event must not be in modifier_bp. 196 */ 197 modifier_event [ukhpPGHSDIWeb]+ 198 modifier_bp [rwx]{1,3} 199 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) 200 lc_op_result (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss) 201 digit [0-9] 202 non_digit [^0-9] 203 204 %% 205 206 %{ 207 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner); 208 { 209 int start_token = _parse_state->stoken; 210 211 if (start_token == PE_START_TERMS) 212 BEGIN(config); 213 else if (start_token == PE_START_EVENTS) 214 BEGIN(event); 215 216 if (start_token) { 217 _parse_state->stoken = 0; 218 /* 219 * The flex parser does not init locations variable 220 * via the scan_string interface, so we need do the 221 * init in here. 222 */ 223 yycolumn = 0; 224 return start_token; 225 } 226 } 227 %} 228 229 <event>{ 230 231 {group} { 232 BEGIN(INITIAL); 233 REWIND(0); 234 } 235 236 {event_pmu} | 237 {bpf_object} | 238 {bpf_source} | 239 {event} { 240 BEGIN(INITIAL); 241 REWIND(1); 242 return PE_EVENT_NAME; 243 } 244 245 <<EOF>> { 246 BEGIN(INITIAL); 247 REWIND(0); 248 } 249 , { 250 return ','; 251 } 252 } 253 254 <array>{ 255 "]" { BEGIN(config); return ']'; } 256 {num_dec} { return value(yyscanner, 10); } 257 {num_hex} { return value(yyscanner, 16); } 258 , { return ','; } 259 "\.\.\." { return PE_ARRAY_RANGE; } 260 } 261 262 <config>{ 263 /* 264 * Please update config_term_names when new static term is added. 265 */ 266 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } 267 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); } 268 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); } 269 config3 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG3); } 270 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); } 271 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); } 272 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); } 273 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); } 274 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); } 275 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); } 276 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); } 277 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); } 278 nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); } 279 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); } 280 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); } 281 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); } 282 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); } 283 percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); } 284 aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); } 285 aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); } 286 metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); } 287 cpu-cycles|cycles { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); } 288 stalled-cycles-frontend|idle-cycles-frontend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 289 stalled-cycles-backend|idle-cycles-backend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 290 instructions { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); } 291 cache-references { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); } 292 cache-misses { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); } 293 branch-instructions|branches { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 294 branch-misses { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); } 295 bus-cycles { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); } 296 ref-cycles { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); } 297 r{num_raw_hex} { return str(yyscanner, PE_RAW); } 298 r0x{num_raw_hex} { return str(yyscanner, PE_RAW); } 299 , { return ','; } 300 "/" { BEGIN(INITIAL); return '/'; } 301 {lc_type} { return lc_str(yyscanner, _parse_state); } 302 {lc_type}-{lc_op_result} { return lc_str(yyscanner, _parse_state); } 303 {lc_type}-{lc_op_result}-{lc_op_result} { return lc_str(yyscanner, _parse_state); } 304 {name_minus} { return str(yyscanner, PE_NAME); } 305 \[all\] { return PE_ARRAY_ALL; } 306 "[" { BEGIN(array); return '['; } 307 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); } 308 } 309 310 <mem>{ 311 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); } 312 /* 313 * The colon before memory access modifiers can get mixed up with the 314 * colon before event modifiers. Fortunately none of the option letters 315 * are the same, so trailing context can be used disambiguate the two 316 * cases. 317 */ 318 ":"/{modifier_bp} { return PE_BP_COLON; } 319 /* 320 * The slash before memory length can get mixed up with the slash before 321 * config terms. Fortunately config terms do not start with a numeric 322 * digit, so trailing context can be used disambiguate the two cases. 323 */ 324 "/"/{digit} { return PE_BP_SLASH; } 325 "/"/{non_digit} { BEGIN(config); return '/'; } 326 {num_dec} { return value(yyscanner, 10); } 327 {num_hex} { return value(yyscanner, 16); } 328 /* 329 * We need to separate 'mem:' scanner part, in order to get specific 330 * modifier bits parsed out. Otherwise we would need to handle PE_NAME 331 * and we'd need to parse it manually. During the escape from <mem> 332 * state we need to put the escaping char back, so we dont miss it. 333 */ 334 . { unput(*yytext); BEGIN(INITIAL); } 335 /* 336 * We destroy the scanner after reaching EOF, 337 * but anyway just to be sure get back to INIT state. 338 */ 339 <<EOF>> { BEGIN(INITIAL); } 340 } 341 342 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } 343 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 344 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 345 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } 346 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } 347 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } 348 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 349 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } 350 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } 351 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } 352 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } 353 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } 354 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } 355 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } 356 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } 357 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } 358 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } 359 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } 360 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } 361 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } 362 duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); } 363 user_time { return tool(yyscanner, PERF_TOOL_USER_TIME); } 364 system_time { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); } 365 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } 366 cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); } 367 368 {lc_type} { return str(yyscanner, PE_LEGACY_CACHE); } 369 {lc_type}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); } 370 {lc_type}-{lc_op_result}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); } 371 mem: { BEGIN(mem); return PE_PREFIX_MEM; } 372 r{num_raw_hex} { return str(yyscanner, PE_RAW); } 373 {num_dec} { return value(yyscanner, 10); } 374 {num_hex} { return value(yyscanner, 16); } 375 376 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); } 377 {bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); } 378 {bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); } 379 {name} { return str(yyscanner, PE_NAME); } 380 {name_tag} { return str(yyscanner, PE_NAME); } 381 "/" { BEGIN(config); return '/'; } 382 , { BEGIN(event); return ','; } 383 : { return ':'; } 384 "{" { BEGIN(event); return '{'; } 385 "}" { return '}'; } 386 = { return '='; } 387 \n { } 388 . { } 389 390 %% 391 392 int parse_events_wrap(void *scanner __maybe_unused) 393 { 394 return 1; 395 } 396