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