4 %option prefix="parse_events_"
6 %option bison-locations
12 #include <sys/types.h>
15 #include "parse-events.h"
16 #include "parse-events-bison.h"
19 char *parse_events_get_text(yyscan_t yyscanner);
20 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
22 static int __value(YYSTYPE *yylval, char *str, int base, int token)
27 num = strtoull(str, NULL, base);
35 static int value(yyscan_t scanner, int base)
37 YYSTYPE *yylval = parse_events_get_lval(scanner);
38 char *text = parse_events_get_text(scanner);
40 return __value(yylval, text, base, PE_VALUE);
43 static int str(yyscan_t scanner, int token)
45 YYSTYPE *yylval = parse_events_get_lval(scanner);
46 char *text = parse_events_get_text(scanner);
48 if (text[0] != '\'') {
49 yylval->str = strdup(text);
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
56 * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
57 * quotes need to be escaped to bypass shell
60 yylval->str = strndup(&text[1], strlen(text) - 2);
66 static int raw(yyscan_t scanner)
68 YYSTYPE *yylval = parse_events_get_lval(scanner);
69 char *text = parse_events_get_text(scanner);
71 if (perf_pmu__parse_check(text) == PMU_EVENT_SYMBOL)
72 return str(scanner, PE_NAME);
74 return __value(yylval, text + 1, 16, PE_RAW);
77 static bool isbpf_suffix(char *text)
79 int len = strlen(text);
83 if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
86 if (len > 4 && !strcmp(text + len - 4, ".obj"))
91 static bool isbpf(yyscan_t scanner)
93 char *text = parse_events_get_text(scanner);
96 if (!isbpf_suffix(text))
99 return stat(text, &st) == 0;
103 * This function is called when the parser gets two kind of input:
105 * @cfg1 or @cfg2=config
107 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
108 * bison. In the latter case it is necessary to keep the string intact so that
109 * the PMU kernel driver can determine what configurable is associated to
112 static int drv_str(yyscan_t scanner, int token)
114 YYSTYPE *yylval = parse_events_get_lval(scanner);
115 char *text = parse_events_get_text(scanner);
117 /* Strip off the '@' */
118 yylval->str = strdup(text + 1);
122 #define REWIND(__alloc) \
124 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
125 char *text = parse_events_get_text(yyscanner); \
128 __yylval->str = strdup(text); \
130 yycolumn -= strlen(text); \
134 static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_state)
136 YYSTYPE *yylval = parse_events_get_lval(scanner);
137 char *text = parse_events_get_text(scanner);
139 yylval->str = strdup(text);
142 * If we're not testing then parse check determines the PMU event type
143 * which if it isn't a PMU returns PE_NAME. When testing the result of
144 * parse check can't be trusted so we return PE_PMU_EVENT_FAKE unless
145 * an '!' is present in which case the text can't be a PMU name.
147 switch (perf_pmu__parse_check(text)) {
148 case PMU_EVENT_SYMBOL_PREFIX:
149 return PE_PMU_EVENT_PRE;
150 case PMU_EVENT_SYMBOL_SUFFIX:
151 return PE_PMU_EVENT_SUF;
152 case PMU_EVENT_SYMBOL_SUFFIX2:
153 return PE_PMU_EVENT_SUF2;
154 case PMU_EVENT_SYMBOL:
155 return parse_state->fake_pmu
156 ? PE_PMU_EVENT_FAKE : PE_KERNEL_PMU_EVENT;
158 return parse_state->fake_pmu && !strchr(text,'!')
159 ? PE_PMU_EVENT_FAKE : PE_NAME;
163 static int sym(yyscan_t scanner, int type, int config)
165 YYSTYPE *yylval = parse_events_get_lval(scanner);
167 yylval->num = (type << 16) + config;
168 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
171 static int tool(yyscan_t scanner, enum perf_tool_event event)
173 YYSTYPE *yylval = parse_events_get_lval(scanner);
176 return PE_VALUE_SYM_TOOL;
179 static int term(yyscan_t scanner, int type)
181 YYSTYPE *yylval = parse_events_get_lval(scanner);
187 #define YY_USER_ACTION \
189 yylloc->last_column = yylloc->first_column; \
190 yylloc->first_column = yycolumn; \
191 yycolumn += yyleng; \
194 #define USER_REJECT \
195 yycolumn -= yyleng; \
205 group [^,{}/]*[{][^}]*[}][^,{}/]*
206 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
208 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
209 bpf_source [^,{}]+\.c[a-zA-Z0-9._]*
212 num_hex 0x[a-fA-F0-9]+
213 num_raw_hex [a-fA-F0-9]+
214 name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]!]*
215 name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
216 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
217 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
218 /* If you add a modifier you need to update check_modifier() */
219 modifier_event [ukhpPGHSDIWeb]+
220 modifier_bp [rwx]{1,3}
225 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);
228 int start_token = _parse_state->stoken;
230 if (start_token == PE_START_TERMS)
232 else if (start_token == PE_START_EVENTS)
236 _parse_state->stoken = 0;
238 * The flex parser does not init locations variable
239 * via the scan_string interface, so we need do the
261 return PE_EVENT_NAME;
274 "]" { BEGIN(config); return ']'; }
275 {num_dec} { return value(yyscanner, 10); }
276 {num_hex} { return value(yyscanner, 16); }
278 "\.\.\." { return PE_ARRAY_RANGE; }
283 * Please update config_term_names when new static term is added.
285 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
286 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
287 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
288 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
289 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
290 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
291 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
292 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
293 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
294 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
295 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
296 nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }
297 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
298 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
299 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
300 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
301 percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
302 aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
303 aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
304 metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); }
305 r{num_raw_hex} { return raw(yyscanner); }
306 r0x{num_raw_hex} { return raw(yyscanner); }
308 "/" { BEGIN(INITIAL); return '/'; }
309 {name_minus} { return str(yyscanner, PE_NAME); }
310 \[all\] { return PE_ARRAY_ALL; }
311 "[" { BEGIN(array); return '['; }
312 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
316 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
319 {num_dec} { return value(yyscanner, 10); }
320 {num_hex} { return value(yyscanner, 16); }
322 * We need to separate 'mem:' scanner part, in order to get specific
323 * modifier bits parsed out. Otherwise we would need to handle PE_NAME
324 * and we'd need to parse it manually. During the escape from <mem>
325 * state we need to put the escaping char back, so we dont miss it.
327 . { unput(*yytext); BEGIN(INITIAL); }
329 * We destroy the scanner after reaching EOF,
330 * but anyway just to be sure get back to INIT state.
332 <<EOF>> { BEGIN(INITIAL); }
335 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
336 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
337 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
338 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
339 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
340 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
341 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
342 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
343 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
344 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
345 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
346 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
347 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
348 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
349 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
350 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
351 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
352 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
353 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
354 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
355 duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); }
356 user_time { return tool(yyscanner, PERF_TOOL_USER_TIME); }
357 system_time { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); }
358 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
359 cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); }
362 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
363 * Because the prefix cycles is mixed up with cpu-cycles.
364 * loads and stores are mixed up with cache event
372 tx-capacity-[a-z-]+ |
373 el-capacity-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
375 L1-dcache|l1-d|l1d|L1-data |
376 L1-icache|l1-i|l1i|L1-instruction |
378 dTLB|d-tlb|Data-TLB |
379 iTLB|i-tlb|Instruction-TLB |
380 branch|branches|bpu|btb|bpc |
381 node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
385 prefetch|prefetches |
386 speculative-read|speculative-load |
387 refs|Reference|ops|access |
388 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
390 mem: { BEGIN(mem); return PE_PREFIX_MEM; }
391 r{num_raw_hex} { return raw(yyscanner); }
392 {num_dec} { return value(yyscanner, 10); }
393 {num_hex} { return value(yyscanner, 16); }
395 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
396 {bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
397 {bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
398 {name} { return pmu_str_check(yyscanner, _parse_state); }
399 {name_tag} { return str(yyscanner, PE_NAME); }
400 "/" { BEGIN(config); return '/'; }
402 , { BEGIN(event); return ','; }
404 "{" { BEGIN(event); return '{'; }
412 int parse_events_wrap(void *scanner __maybe_unused)