tools/perf/util/parse-events.l

   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 int lc_str(yyscan_t scanner, const struct parse_events_state *state)
  67 {
  68         return str(scanner, state->match_legacy_cache_terms ? PE_LEGACY_CACHE : PE_NAME);
  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 sym(yyscan_t scanner, int type, int config)
 104 {
 105         YYSTYPE *yylval = parse_events_get_lval(scanner);
 106
 107         yylval->num = (type << 16) + config;
 108         return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
 109 }
 110
 111 static int tool(yyscan_t scanner, enum perf_tool_event event)
 112 {
 113         YYSTYPE *yylval = parse_events_get_lval(scanner);
 114
 115         yylval->num = event;
 116         return PE_VALUE_SYM_TOOL;
 117 }
 118
 119 static int term(yyscan_t scanner, enum parse_events__term_type type)
 120 {
 121         YYSTYPE *yylval = parse_events_get_lval(scanner);
 122
 123         yylval->num = type;
 124         return PE_TERM;
 125 }
 126
 127 static int hw_term(yyscan_t scanner, int config)
 128 {
 129         YYSTYPE *yylval = parse_events_get_lval(scanner);
 130         char *text = parse_events_get_text(scanner);
 131
 132         yylval->hardware_term.str = strdup(text);
 133         yylval->hardware_term.num = PERF_TYPE_HARDWARE + config;
 134         return PE_TERM_HW;
 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 #define USER_REJECT             \
 145         yycolumn -= yyleng;     \
 146         REJECT
 147
 148 %}
 149
 150 %x mem
 151 %s config
 152 %x event
 153
 154 group           [^,{}/]*[{][^}]*[}][^,{}/]*
 155 event_pmu       [^,{}/]+[/][^/]*[/][^,{}/]*
 156 event           [^,{}/]+
 157
 158 num_dec         [0-9]+
 159 num_hex         0x[a-fA-F0-9]+
 160 num_raw_hex     [a-fA-F0-9]+
 161 name            [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
 162 name_tag        [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
 163 name_minus      [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
 164 drv_cfg_term    [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
 165 /*
 166  * If you add a modifier you need to update check_modifier().
 167  * Also, the letters in modifier_event must not be in modifier_bp.
 168  */
 169 modifier_event  [ukhpPGHSDIWeb]+
 170 modifier_bp     [rwx]{1,3}
 171 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)
 172 lc_op_result    (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss)
 173 digit           [0-9]
 174 non_digit       [^0-9]
 175
 176 %%
 177
 178 %{
 179         struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);
 180         {
 181                 int start_token = _parse_state->stoken;
 182
 183                 if (start_token == PE_START_TERMS)
 184                         BEGIN(config);
 185                 else if (start_token == PE_START_EVENTS)
 186                         BEGIN(event);
 187
 188                 if (start_token) {
 189                         _parse_state->stoken = 0;
 190                         /*
 191                          * The flex parser does not init locations variable
 192                          * via the scan_string interface, so we need do the
 193                          * init in here.
 194                          */
 195                         yycolumn = 0;
 196                         return start_token;
 197                 }
 198          }
 199 %}
 200
 201 <event>{
 202
 203 {group}         {
 204                         BEGIN(INITIAL);
 205                         REWIND(0);
 206                 }
 207
 208 {event_pmu}     |
 209 {event}         {
 210                         BEGIN(INITIAL);
 211                         REWIND(1);
 212                         return PE_EVENT_NAME;
 213                 }
 214
 215 <<EOF>>         {
 216                         BEGIN(INITIAL);
 217                         REWIND(0);
 218                 }
 219 ,               {
 220                         return ',';
 221                 }
 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 config3                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG3); }
 232 name                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
 233 period                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
 234 freq                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
 235 branch_type             { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
 236 time                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
 237 call-graph              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
 238 stack-size              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
 239 max-stack               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
 240 nr                      { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }
 241 inherit                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
 242 no-inherit              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
 243 overwrite               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
 244 no-overwrite            { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
 245 percore                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
 246 aux-output              { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
 247 aux-sample-size         { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
 248 metric-id               { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); }
 249 cpu-cycles|cycles                               { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); }
 250 stalled-cycles-frontend|idle-cycles-frontend    { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 251 stalled-cycles-backend|idle-cycles-backend      { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
 252 instructions                                    { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); }
 253 cache-references                                { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); }
 254 cache-misses                                    { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); }
 255 branch-instructions|branches                    { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
 256 branch-misses                                   { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); }
 257 bus-cycles                                      { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); }
 258 ref-cycles                                      { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); }
 259 r{num_raw_hex}          { return str(yyscanner, PE_RAW); }
 260 r0x{num_raw_hex}        { return str(yyscanner, PE_RAW); }
 261 ,                       { return ','; }
 262 "/"                     { BEGIN(INITIAL); return '/'; }
 263 {lc_type}                       { return lc_str(yyscanner, _parse_state); }
 264 {lc_type}-{lc_op_result}        { return lc_str(yyscanner, _parse_state); }
 265 {lc_type}-{lc_op_result}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }
 266 {name_minus}            { return str(yyscanner, PE_NAME); }
 267 @{drv_cfg_term}         { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
 268 }
 269
 270 <mem>{
 271 {modifier_bp}           { return str(yyscanner, PE_MODIFIER_BP); }
 272         /*
 273          * The colon before memory access modifiers can get mixed up with the
 274          * colon before event modifiers. Fortunately none of the option letters
 275          * are the same, so trailing context can be used disambiguate the two
 276          * cases.
 277          */
 278 ":"/{modifier_bp}       { return PE_BP_COLON; }
 279         /*
 280          * The slash before memory length can get mixed up with the slash before
 281          * config terms. Fortunately config terms do not start with a numeric
 282          * digit, so trailing context can be used disambiguate the two cases.
 283          */
 284 "/"/{digit}             { return PE_BP_SLASH; }
 285 "/"/{non_digit}         { BEGIN(config); return '/'; }
 286 {num_dec}               { return value(yyscanner, 10); }
 287 {num_hex}               { return value(yyscanner, 16); }
 288         /*
 289          * We need to separate 'mem:' scanner part, in order to get specific
 290          * modifier bits parsed out. Otherwise we would need to handle PE_NAME
 291          * and we'd need to parse it manually. During the escape from <mem>
 292          * state we need to put the escaping char back, so we dont miss it.
 293          */
 294 .                       { unput(*yytext); BEGIN(INITIAL); }
 295         /*
 296          * We destroy the scanner after reaching EOF,
 297          * but anyway just to be sure get back to INIT state.
 298          */
 299 <<EOF>>                 { BEGIN(INITIAL); }
 300 }
 301
 302 cpu-cycles|cycles                               { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
 303 stalled-cycles-frontend|idle-cycles-frontend    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 304 stalled-cycles-backend|idle-cycles-backend      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
 305 instructions                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
 306 cache-references                                { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
 307 cache-misses                                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
 308 branch-instructions|branches                    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
 309 branch-misses                                   { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
 310 bus-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
 311 ref-cycles                                      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
 312 cpu-clock                                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
 313 task-clock                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
 314 page-faults|faults                              { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
 315 minor-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
 316 major-faults                                    { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
 317 context-switches|cs                             { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
 318 cpu-migrations|migrations                       { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
 319 alignment-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
 320 emulation-faults                                { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
 321 dummy                                           { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
 322 duration_time                                   { return tool(yyscanner, PERF_TOOL_DURATION_TIME); }
 323 user_time                                               { return tool(yyscanner, PERF_TOOL_USER_TIME); }
 324 system_time                                             { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); }
 325 bpf-output                                      { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
 326 cgroup-switches                                 { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); }
 327
 328 {lc_type}                       { return str(yyscanner, PE_LEGACY_CACHE); }
 329 {lc_type}-{lc_op_result}        { return str(yyscanner, PE_LEGACY_CACHE); }
 330 {lc_type}-{lc_op_result}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }
 331 mem:                    { BEGIN(mem); return PE_PREFIX_MEM; }
 332 r{num_raw_hex}          { return str(yyscanner, PE_RAW); }
 333 {num_dec}               { return value(yyscanner, 10); }
 334 {num_hex}               { return value(yyscanner, 16); }
 335
 336 {modifier_event}        { return str(yyscanner, PE_MODIFIER_EVENT); }
 337 {name}                  { return str(yyscanner, PE_NAME); }
 338 {name_tag}              { return str(yyscanner, PE_NAME); }
 339 "/"                     { BEGIN(config); return '/'; }
 340 ,                       { BEGIN(event); return ','; }
 341 :                       { return ':'; }
 342 "{"                     { BEGIN(event); return '{'; }
 343 "}"                     { return '}'; }
 344 =                       { return '='; }
 345 \n                      { }
 346 .                       { }
 347
 348 %%
 349
 350 int parse_events_wrap(void *scanner __maybe_unused)
 351 {
 352         return 1;
 353 }