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 20char *parse_events_get_text(yyscan_t yyscanner); 21YYSTYPE *parse_events_get_lval(yyscan_t yyscanner); 22 23static 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 36static 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 44static 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 52static 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 75static 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 89static 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 */ 110static 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) \ 121do { \ 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 132static int pmu_str_check(yyscan_t scanner) 133{ 134 YYSTYPE *yylval = parse_events_get_lval(scanner); 135 char *text = parse_events_get_text(scanner); 136 137 yylval->str = strdup(text); 138 switch (perf_pmu__parse_check(text)) { 139 case PMU_EVENT_SYMBOL_PREFIX: 140 return PE_PMU_EVENT_PRE; 141 case PMU_EVENT_SYMBOL_SUFFIX: 142 return PE_PMU_EVENT_SUF; 143 case PMU_EVENT_SYMBOL: 144 return PE_KERNEL_PMU_EVENT; 145 default: 146 return PE_NAME; 147 } 148} 149 150static int sym(yyscan_t scanner, int type, int config) 151{ 152 YYSTYPE *yylval = parse_events_get_lval(scanner); 153 154 yylval->num = (type << 16) + config; 155 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW; 156} 157 158static int tool(yyscan_t scanner, enum perf_tool_event event) 159{ 160 YYSTYPE *yylval = parse_events_get_lval(scanner); 161 162 yylval->num = event; 163 return PE_VALUE_SYM_TOOL; 164} 165 166static int term(yyscan_t scanner, int type) 167{ 168 YYSTYPE *yylval = parse_events_get_lval(scanner); 169 170 yylval->num = type; 171 return PE_TERM; 172} 173 174#define YY_USER_ACTION \ 175do { \ 176 yylloc->last_column = yylloc->first_column; \ 177 yylloc->first_column = yycolumn; \ 178 yycolumn += yyleng; \ 179} while (0); 180 181#define USER_REJECT \ 182 yycolumn -= yyleng; \ 183 REJECT 184 185%} 186 187%x mem 188%s config 189%x event 190%x array 191 192group [^,{}/]*[{][^}]*[}][^,{}/]* 193event_pmu [^,{}/]+[/][^/]*[/][^,{}/]* 194event [^,{}/]+ 195bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]* 196bpf_source [^,{}]+\.c[a-zA-Z0-9._]* 197 198num_dec [0-9]+ 199num_hex 0x[a-fA-F0-9]+ 200num_raw_hex [a-fA-F0-9]+ 201name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]* 202name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\'] 203name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]* 204drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)? 205/* If you add a modifier you need to update check_modifier() */ 206modifier_event [ukhpPGHSDIW]+ 207modifier_bp [rwx]{1,3} 208 209%% 210 211%{ 212 { 213 int start_token; 214 215 start_token = parse_events_get_extra(yyscanner); 216 217 if (start_token == PE_START_TERMS) 218 BEGIN(config); 219 else if (start_token == PE_START_EVENTS) 220 BEGIN(event); 221 222 if (start_token) { 223 parse_events_set_extra(NULL, yyscanner); 224 /* 225 * The flex parser does not init locations variable 226 * via the scan_string interface, so we need do the 227 * init in here. 228 */ 229 yycolumn = 0; 230 return start_token; 231 } 232 } 233%} 234 235<event>{ 236 237{group} { 238 BEGIN(INITIAL); 239 REWIND(0); 240 } 241 242{event_pmu} | 243{bpf_object} | 244{bpf_source} | 245{event} { 246 BEGIN(INITIAL); 247 REWIND(1); 248 return PE_EVENT_NAME; 249 } 250 251<<EOF>> { 252 BEGIN(INITIAL); 253 REWIND(0); 254 } 255 256} 257 258<array>{ 259"]" { BEGIN(config); return ']'; } 260{num_dec} { return value(yyscanner, 10); } 261{num_hex} { return value(yyscanner, 16); } 262, { return ','; } 263"\.\.\." { return PE_ARRAY_RANGE; } 264} 265 266<config>{ 267 /* 268 * Please update config_term_names when new static term is added. 269 */ 270config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); } 271config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); } 272config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); } 273name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); } 274period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); } 275freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); } 276branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); } 277time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); } 278call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); } 279stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); } 280max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); } 281nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); } 282inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); } 283no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); } 284overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); } 285no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); } 286percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); } 287, { return ','; } 288"/" { BEGIN(INITIAL); return '/'; } 289{name_minus} { return str(yyscanner, PE_NAME); } 290\[all\] { return PE_ARRAY_ALL; } 291"[" { BEGIN(array); return '['; } 292@{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); } 293} 294 295<mem>{ 296{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); } 297: { return ':'; } 298"/" { return '/'; } 299{num_dec} { return value(yyscanner, 10); } 300{num_hex} { return value(yyscanner, 16); } 301 /* 302 * We need to separate 'mem:' scanner part, in order to get specific 303 * modifier bits parsed out. Otherwise we would need to handle PE_NAME 304 * and we'd need to parse it manually. During the escape from <mem> 305 * state we need to put the escaping char back, so we dont miss it. 306 */ 307. { unput(*yytext); BEGIN(INITIAL); } 308 /* 309 * We destroy the scanner after reaching EOF, 310 * but anyway just to be sure get back to INIT state. 311 */ 312<<EOF>> { BEGIN(INITIAL); } 313} 314 315cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); } 316stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); } 317stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); } 318instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); } 319cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); } 320cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); } 321branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); } 322branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); } 323bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); } 324ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); } 325cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); } 326task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); } 327page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); } 328minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); } 329major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); } 330context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); } 331cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); } 332alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); } 333emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); } 334dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); } 335duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); } 336bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); } 337 338 /* 339 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately. 340 * Because the prefix cycles is mixed up with cpu-cycles. 341 * loads and stores are mixed up with cache event 342 */ 343cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 344cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 345mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 346mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 347topdown-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); } 348 349L1-dcache|l1-d|l1d|L1-data | 350L1-icache|l1-i|l1i|L1-instruction | 351LLC|L2 | 352dTLB|d-tlb|Data-TLB | 353iTLB|i-tlb|Instruction-TLB | 354branch|branches|bpu|btb|bpc | 355node { return str(yyscanner, PE_NAME_CACHE_TYPE); } 356 357load|loads|read | 358store|stores|write | 359prefetch|prefetches | 360speculative-read|speculative-load | 361refs|Reference|ops|access | 362misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); } 363 364mem: { BEGIN(mem); return PE_PREFIX_MEM; } 365r{num_raw_hex} { return raw(yyscanner); } 366{num_dec} { return value(yyscanner, 10); } 367{num_hex} { return value(yyscanner, 16); } 368 369{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); } 370{bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); } 371{bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); } 372{name} { return pmu_str_check(yyscanner); } 373{name_tag} { return str(yyscanner, PE_NAME); } 374"/" { BEGIN(config); return '/'; } 375- { return '-'; } 376, { BEGIN(event); return ','; } 377: { return ':'; } 378"{" { BEGIN(event); return '{'; } 379"}" { return '}'; } 380= { return '='; } 381\n { } 382. { } 383 384%% 385 386int parse_events_wrap(void *scanner __maybe_unused) 387{ 388 return 1; 389} 390