1 2 %option reentrant 3 %option bison-bridge 4 %option prefix="parse_events_" 5 %option stack 6 %option bison-locations 7 %option yylineno 8 9 %{ 10 #include <errno.h> 11 #include "../perf.h" 12 #include "parse-events.h" 13 #include "parse-events-bison.h" 14 15 char *parse_events_get_text(yyscan_t yyscanner); 16 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner); 17 18 static int __value(YYSTYPE *yylval, char *str, int base, int token) 19 { 20 u64 num; 21 22 errno = 0; 23 num = strtoull(str, NULL, base); 24 if (errno) 25 return PE_ERROR; 26 27 yylval->num = num; 28 return token; 29 } 30 31 static int value(yyscan_t scanner, int base) 32 { 33 YYSTYPE *yylval = parse_events_get_lval(scanner); 34 char *text = parse_events_get_text(scanner); 35 36 return __value(yylval, text, base, PE_VALUE); 37 } 38 39 static int raw(yyscan_t scanner) 40 { 41 YYSTYPE *yylval = parse_events_get_lval(scanner); 42 char *text = parse_events_get_text(scanner); 43 44 return __value(yylval, text + 1, 16, PE_RAW); 45 } 46 47 static int str(yyscan_t scanner, int token) 48 { 49 YYSTYPE *yylval = parse_events_get_lval(scanner); 50 char *text = parse_events_get_text(scanner); 51 52 yylval->str = strdup(text); 53 return token; 54 } 55 56 static bool isbpf(yyscan_t scanner) 57 { 58 char *text = parse_events_get_text(scanner); 59 int len = strlen(text); 60 61 if (len < 2) 62 return false; 63 if ((text[len - 1] == 'c' || text[len - 1] == 'o') && 64 text[len - 2] == '.') 65 return true; 66 if (len > 4 && !strcmp(text + len - 4, ".obj")) 67 return true; 68 return false; 69 } 70 71 /* 72 * This function is called when the parser gets two kind of input: 73 * 74 * @cfg1 or @cfg2=config 75 * 76 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to 77 * bison. In the latter case it is necessary to keep the string intact so that 78 * the PMU kernel driver can determine what configurable is associated to 79 * 'config'. 80 */ 81 static int drv_str(yyscan_t scanner, int token) 82 { 83 YYSTYPE *yylval = parse_events_get_lval(scanner); 84 char *text = parse_events_get_text(scanner); 85 86 /* Strip off the '@' */ 87 yylval->str = strdup(text + 1); 88 return token; 89 } 90 91 #define REWIND(__alloc) \ 92 do { \ 93 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \ 94 char *text = parse_events_get_text(yyscanner); \ 95 \ 96 if (__alloc) \ 97 __yylval->str = strdup(text); \ 98 \ 99 yycolumn -= strlen(text); \ 100 yyless(0); \ 101 } while (0) 102 103 static int pmu_str_check(yyscan_t scanner) 104 { 105 YYSTYPE *yylval = parse_events_get_lval(scanner); 106 char *text = parse_events_get_text(scanner); 107 108 yylval->str = strdup(text); 109 switch (perf_pmu__parse_check(text)) { 110 case PMU_EVENT_SYMBOL_PREFIX: 111 return PE_PMU_EVENT_PRE; 112 case PMU_EVENT_SYMBOL_SUFFIX: 113 return PE_PMU_EVENT_SUF; 114 case PMU_EVENT_SYMBOL: 115 return PE_KERNEL_PMU_EVENT; 116 default: 117 return PE_NAME; 118 } 119 } 120 121 static int sym(yyscan_t scanner, int type, int config) 122 { 123 YYSTYPE *yylval = parse_events_get_lval(scanner); 124 125 yylval->num = (type << 16) + config; 126 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; 127 } 128 129 static int term(yyscan_t scanner, int type) 130 { 131 YYSTYPE *yylval = parse_events_get_lval(scanner); 132 133 yylval->num = type; 134 return PE_TERM; 135 } 136 137 #define YY_USER_ACTION \ 138 do { \ 139 yylloc->last_column = yylloc->first_column; \ 140 yylloc->first_column = yycolumn; \ 141 yycolumn += yyleng; \ 142 } while (0); 143 144 %} 145 146 %x mem 147 %s config 148 %x event 149 %x array 150 151 group [^,{}/]*[{][^}]*[}][^,{}/]* 152 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]* 153 event [^,{}/]+ 154 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]* 155 bpf_source [^,{}]+\.c[a-zA-Z0-9._]* 156 157 num_dec [0-9]+ 158 num_hex 0x[a-fA-F0-9]+ 159 num_raw_hex [a-fA-F0-9]+ 160 name [a-zA-Z_*?][a-zA-Z0-9_*?.]* 161 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]* 162 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)? 163 /* If you add a modifier you need to update check_modifier() */ 164 modifier_event [ukhpPGHSDI]+ 165 modifier_bp [rwx]{1,3} 166 167 %% 168 169 %{ 170 { 171 int start_token; 172 173 start_token = parse_events_get_extra(yyscanner); 174 175 if (start_token == PE_START_TERMS) 176 BEGIN(config); 177 else if (start_token == PE_START_EVENTS) 178 BEGIN(event); 179 180 if (start_token) { 181 parse_events_set_extra(NULL, yyscanner); 182 /* 183 * The flex parser does not init locations variable 184 * via the scan_string interface, so we need do the 185 * init in here. 186 */ 187 yycolumn = 0; 188 return start_token; 189 } 190 } 191 %} 192 193 <event>{ 194 195 {group} { 196 BEGIN(INITIAL); 197 REWIND(0); 198 } 199 200 {event_pmu} | 201 {bpf_object} | 202 {bpf_source} | 203 {event} { 204 BEGIN(INITIAL); 205 REWIND(1); 206 return PE_EVENT_NAME; 207 } 208 209 <<EOF>> { 210 BEGIN(INITIAL); 211 REWIND(0); 212 } 213 214 } 215 216 <array>{ 217 "]" { BEGIN(config); return ']'; } 218 {num_dec} { return value(yyscanner, 10); } 219 {num_hex} { return value(yyscanner, 16); } 220 , { return ','; } 221 "\.\.\." { return PE_ARRAY_RANGE; } 222 } 223 224 <config>{ 225 /* 226 * Please update config_term_names when new static term is added. 227 */ 228 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } 229 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); } 230 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); } 231 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); } 232 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); } 233 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); } 234 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); } 235 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); } 236 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); } 237 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); } 238 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); } 239 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); } 240 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); } 241 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); } 242 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); } 243 , { return ','; } 244 "/" { BEGIN(INITIAL); return '/'; } 245 {name_minus} { return str(yyscanner, PE_NAME); } 246 \[all\] { return PE_ARRAY_ALL; } 247 "[" { BEGIN(array); return '['; } 248 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); } 249 } 250 251 <mem>{ 252 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); } 253 : { return ':'; } 254 "/" { return '/'; } 255 {num_dec} { return value(yyscanner, 10); } 256 {num_hex} { return value(yyscanner, 16); } 257 /* 258 * We need to separate 'mem:' scanner part, in order to get specific 259 * modifier bits parsed out. Otherwise we would need to handle PE_NAME 260 * and we'd need to parse it manually. During the escape from <mem> 261 * state we need to put the escaping char back, so we dont miss it. 262 */ 263 . { unput(*yytext); BEGIN(INITIAL); } 264 /* 265 * We destroy the scanner after reaching EOF, 266 * but anyway just to be sure get back to INIT state. 267 */ 268 <<EOF>> { BEGIN(INITIAL); } 269 } 270 271 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } 272 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 273 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 274 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } 275 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } 276 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } 277 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 278 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } 279 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } 280 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } 281 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } 282 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } 283 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } 284 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } 285 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } 286 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } 287 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } 288 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } 289 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } 290 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } 291 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } 292 293 /* 294 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately. 295 * Because the prefix cycles is mixed up with cpu-cycles. 296 * loads and stores are mixed up with cache event 297 */ 298 cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 299 cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 300 mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 301 mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 302 topdown-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 303 304 L1-dcache|l1-d|l1d|L1-data | 305 L1-icache|l1-i|l1i|L1-instruction | 306 LLC|L2 | 307 dTLB|d-tlb|Data-TLB | 308 iTLB|i-tlb|Instruction-TLB | 309 branch|branches|bpu|btb|bpc | 310 node { return str(yyscanner, PE_NAME_CACHE_TYPE); } 311 312 load|loads|read | 313 store|stores|write | 314 prefetch|prefetches | 315 speculative-read|speculative-load | 316 refs|Reference|ops|access | 317 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); } 318 319 mem: { BEGIN(mem); return PE_PREFIX_MEM; } 320 r{num_raw_hex} { return raw(yyscanner); } 321 {num_dec} { return value(yyscanner, 10); } 322 {num_hex} { return value(yyscanner, 16); } 323 324 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); } 325 {bpf_object} { if (!isbpf(yyscanner)) REJECT; return str(yyscanner, PE_BPF_OBJECT); } 326 {bpf_source} { if (!isbpf(yyscanner)) REJECT; return str(yyscanner, PE_BPF_SOURCE); } 327 {name} { return pmu_str_check(yyscanner); } 328 "/" { BEGIN(config); return '/'; } 329 - { return '-'; } 330 , { BEGIN(event); return ','; } 331 : { return ':'; } 332 "{" { BEGIN(event); return '{'; } 333 "}" { return '}'; } 334 = { return '='; } 335 \n { } 336 . { } 337 338 %% 339 340 int parse_events_wrap(void *scanner __maybe_unused) 341 { 342 return 1; 343 } 344