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
   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 }