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