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1 2%option reentrant3%option bison-bridge4%option prefix="parse_events_"5%option stack6%option bison-locations7%option yylineno8%option reject9 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 19char *parse_events_get_text(yyscan_t yyscanner);20YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);21int parse_events_get_column(yyscan_t yyscanner);22int parse_events_get_leng(yyscan_t yyscanner);23 24static int get_column(yyscan_t scanner)25{26 return parse_events_get_column(scanner) - parse_events_get_leng(scanner);27}28 29static int value(struct parse_events_state *parse_state, yyscan_t scanner, int base)30{31 YYSTYPE *yylval = parse_events_get_lval(scanner);32 char *text = parse_events_get_text(scanner);33 u64 num;34 35 errno = 0;36 num = strtoull(text, NULL, base);37 if (errno) {38 struct parse_events_error *error = parse_state->error;39 char *help = NULL;40 41 if (asprintf(&help, "Bad base %d number \"%s\"", base, text) > 0)42 parse_events_error__handle(error, get_column(scanner), help , NULL);43 44 return PE_ERROR;45 }46 47 yylval->num = num;48 return PE_VALUE;49}50 51static int str(yyscan_t scanner, int token)52{53 YYSTYPE *yylval = parse_events_get_lval(scanner);54 char *text = parse_events_get_text(scanner);55 56 if (text[0] != '\'') {57 yylval->str = strdup(text);58 } else {59 /*60 * If a text tag specified on the command line61 * contains opening single quite ' then it is62 * expected that the tag ends with single quote63 * as well, like this:64 * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'65 * quotes need to be escaped to bypass shell66 * processing.67 */68 yylval->str = strndup(&text[1], strlen(text) - 2);69 }70 71 return token;72}73 74static int lc_str(yyscan_t scanner, const struct parse_events_state *state)75{76 return str(scanner, state->match_legacy_cache_terms ? PE_LEGACY_CACHE : PE_NAME);77}78 79/*80 * This function is called when the parser gets two kind of input:81 *82 * @cfg1 or @cfg2=config83 *84 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to85 * bison. In the latter case it is necessary to keep the string intact so that86 * the PMU kernel driver can determine what configurable is associated to87 * 'config'.88 */89static int drv_str(yyscan_t scanner, int token)90{91 YYSTYPE *yylval = parse_events_get_lval(scanner);92 char *text = parse_events_get_text(scanner);93 94 /* Strip off the '@' */95 yylval->str = strdup(text + 1);96 return token;97}98 99/*100 * Use yyless to return all the characaters to the input. Update the column for101 * location debugging. If __alloc is non-zero set yylval to the text for the102 * returned token's value.103 */104#define REWIND(__alloc) \105do { \106 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \107 char *text = parse_events_get_text(yyscanner); \108 \109 if (__alloc) \110 __yylval->str = strdup(text); \111 \112 yycolumn -= strlen(text); \113 yyless(0); \114} while (0)115 116static int sym(yyscan_t scanner, int type, int config)117{118 YYSTYPE *yylval = parse_events_get_lval(scanner);119 120 yylval->num = (type << 16) + config;121 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;122}123 124static int tool(yyscan_t scanner, enum perf_tool_event event)125{126 YYSTYPE *yylval = parse_events_get_lval(scanner);127 128 yylval->num = event;129 return PE_VALUE_SYM_TOOL;130}131 132static int term(yyscan_t scanner, enum parse_events__term_type type)133{134 YYSTYPE *yylval = parse_events_get_lval(scanner);135 136 yylval->term_type = type;137 return PE_TERM;138}139 140static int hw_term(yyscan_t scanner, int config)141{142 YYSTYPE *yylval = parse_events_get_lval(scanner);143 char *text = parse_events_get_text(scanner);144 145 yylval->hardware_term.str = strdup(text);146 yylval->hardware_term.num = PERF_TYPE_HARDWARE + config;147 return PE_TERM_HW;148}149 150static void modifiers_error(struct parse_events_state *parse_state, yyscan_t scanner,151 int pos, char mod_char, const char *mod_name)152{153 struct parse_events_error *error = parse_state->error;154 char *help = NULL;155 156 if (asprintf(&help, "Duplicate modifier '%c' (%s)", mod_char, mod_name) > 0)157 parse_events_error__handle(error, get_column(scanner) + pos, help , NULL);158}159 160static int modifiers(struct parse_events_state *parse_state, yyscan_t scanner)161{162 YYSTYPE *yylval = parse_events_get_lval(scanner);163 char *text = parse_events_get_text(scanner);164 struct parse_events_modifier mod = { .precise = 0, };165 166 for (size_t i = 0, n = strlen(text); i < n; i++) {167#define CASE(c, field) \168 case c: \169 if (mod.field) { \170 modifiers_error(parse_state, scanner, i, c, #field); \171 return PE_ERROR; \172 } \173 mod.field = true; \174 break175 176 switch (text[i]) {177 CASE('u', user);178 CASE('k', kernel);179 CASE('h', hypervisor);180 CASE('I', non_idle);181 CASE('G', guest);182 CASE('H', host);183 case 'p':184 mod.precise++;185 /*186 * precise ip:187 *188 * 0 - SAMPLE_IP can have arbitrary skid189 * 1 - SAMPLE_IP must have constant skid190 * 2 - SAMPLE_IP requested to have 0 skid191 * 3 - SAMPLE_IP must have 0 skid192 *193 * See also PERF_RECORD_MISC_EXACT_IP194 */195 if (mod.precise > 3) {196 struct parse_events_error *error = parse_state->error;197 char *help = strdup("Maximum precise value is 3");198 199 if (help) {200 parse_events_error__handle(error, get_column(scanner) + i,201 help , NULL);202 }203 return PE_ERROR;204 }205 break;206 CASE('P', precise_max);207 CASE('S', sample_read);208 CASE('D', pinned);209 CASE('W', weak);210 CASE('e', exclusive);211 CASE('b', bpf);212 CASE('R', retire_lat);213 default:214 return PE_ERROR;215 }216#undef CASE217 }218 yylval->mod = mod;219 return PE_MODIFIER_EVENT;220}221 222#define YY_USER_ACTION \223do { \224 yylloc->last_column = yylloc->first_column; \225 yylloc->first_column = yycolumn; \226 yycolumn += yyleng; \227} while (0);228 229#define USER_REJECT \230 yycolumn -= yyleng; \231 REJECT232 233%}234 235%x mem236%s config237%x event238 239group [^,{}/]*[{][^}]*[}][^,{}/]*240event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*241event [^,{}/]+242 243num_dec [0-9]+244num_hex 0x[a-fA-F0-9]{1,16}245num_raw_hex [a-fA-F0-9]{1,16}246name [a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*247name_tag [\'][a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']248name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*249drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?250/*251 * If you add a modifier you need to update check_modifier().252 * Also, the letters in modifier_event must not be in modifier_bp.253 */254modifier_event [ukhpPGHSDIWebR]{1,16}255modifier_bp [rwx]{1,3}256lc_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)257lc_op_result (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss)258digit [0-9]259non_digit [^0-9]260 261%%262 263%{264 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);265 {266 int start_token = _parse_state->stoken;267 268 if (start_token == PE_START_TERMS)269 BEGIN(config);270 else if (start_token == PE_START_EVENTS)271 BEGIN(event);272 273 if (start_token) {274 _parse_state->stoken = 0;275 /*276 * The flex parser does not init locations variable277 * via the scan_string interface, so we need do the278 * init in here.279 */280 yycolumn = 0;281 return start_token;282 }283 }284%}285 286<event>{287 288{group} {289 BEGIN(INITIAL);290 REWIND(0);291 }292 293{event_pmu} |294{event} {295 BEGIN(INITIAL);296 REWIND(1);297 return PE_EVENT_NAME;298 }299 300<<EOF>> {301 BEGIN(INITIAL);302 REWIND(0);303 }304, {305 return ',';306 }307}308 309<config>{310 /*311 * Please update config_term_names when new static term is added.312 */313config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }314config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }315config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }316config3 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG3); }317name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }318period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }319freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }320branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }321time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }322call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }323stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }324max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }325nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }326inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }327no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }328overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }329no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }330percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }331aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }332aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }333metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); }334cpu-cycles|cycles { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); }335stalled-cycles-frontend|idle-cycles-frontend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }336stalled-cycles-backend|idle-cycles-backend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }337instructions { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); }338cache-references { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); }339cache-misses { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); }340branch-instructions|branches { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }341branch-misses { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); }342bus-cycles { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); }343ref-cycles { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); }344r{num_raw_hex} { return str(yyscanner, PE_RAW); }345r0x{num_raw_hex} { return str(yyscanner, PE_RAW); }346, { return ','; }347"/" { BEGIN(INITIAL); return '/'; }348{lc_type} { return lc_str(yyscanner, _parse_state); }349{lc_type}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }350{lc_type}-{lc_op_result}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }351{name_minus} { return str(yyscanner, PE_NAME); }352@{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }353}354 355<mem>{356{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }357 /*358 * The colon before memory access modifiers can get mixed up with the359 * colon before event modifiers. Fortunately none of the option letters360 * are the same, so trailing context can be used disambiguate the two361 * cases.362 */363":"/{modifier_bp} { return PE_BP_COLON; }364 /*365 * The slash before memory length can get mixed up with the slash before366 * config terms. Fortunately config terms do not start with a numeric367 * digit, so trailing context can be used disambiguate the two cases.368 */369"/"/{digit} { return PE_BP_SLASH; }370"/"/{non_digit} { BEGIN(config); return '/'; }371{num_dec} { return value(_parse_state, yyscanner, 10); }372{num_hex} { return value(_parse_state, yyscanner, 16); }373 /*374 * We need to separate 'mem:' scanner part, in order to get specific375 * modifier bits parsed out. Otherwise we would need to handle PE_NAME376 * and we'd need to parse it manually. During the escape from <mem>377 * state we need to put the escaping char back, so we dont miss it.378 */379. { unput(*yytext); BEGIN(INITIAL); }380 /*381 * We destroy the scanner after reaching EOF,382 * but anyway just to be sure get back to INIT state.383 */384<<EOF>> { BEGIN(INITIAL); }385}386 387cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }388stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }389stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }390instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }391cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }392cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }393branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }394branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }395bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }396ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }397cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }398task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }399page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }400minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }401major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }402context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }403cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }404alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }405emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }406dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }407duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); }408user_time { return tool(yyscanner, PERF_TOOL_USER_TIME); }409system_time { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); }410bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }411cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); }412 413{lc_type} { return str(yyscanner, PE_LEGACY_CACHE); }414{lc_type}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }415{lc_type}-{lc_op_result}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }416mem: { BEGIN(mem); return PE_PREFIX_MEM; }417r{num_raw_hex} { return str(yyscanner, PE_RAW); }418{num_dec} { return value(_parse_state, yyscanner, 10); }419{num_hex} { return value(_parse_state, yyscanner, 16); }420 421{modifier_event} { return modifiers(_parse_state, yyscanner); }422{name} { return str(yyscanner, PE_NAME); }423{name_tag} { return str(yyscanner, PE_NAME); }424"/" { BEGIN(config); return '/'; }425, { BEGIN(event); return ','; }426: { return ':'; }427"{" { BEGIN(event); return '{'; }428"}" { return '}'; }429= { return '='; }430\n { }431. { }432 433%%434 435int parse_events_wrap(void *scanner __maybe_unused)436{437 return 1;438}439