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 yyscan
21 int parse_events_get_column(yyscan_t yyscanner
22 int parse_events_get_leng(yyscan_t yyscanner);
23
24 static int get_column(yyscan_t scanner)
25 {
26 return parse_events_get_column(scanner
27 }
28
29 static int value(struct parse_events_state *pa
30 {
31 YYSTYPE *yylval = parse_events_get_lva
32 char *text = parse_events_get_text(sca
33 u64 num;
34
35 errno = 0;
36 num = strtoull(text, NULL, base);
37 if (errno) {
38 struct parse_events_error *err
39 char *help = NULL;
40
41 if (asprintf(&help, "Bad base
42 parse_events_error__ha
43
44 return PE_ERROR;
45 }
46
47 yylval->num = num;
48 return PE_VALUE;
49 }
50
51 static int str(yyscan_t scanner, int token)
52 {
53 YYSTYPE *yylval = parse_events_get_lva
54 char *text = parse_events_get_text(sca
55
56 if (text[0] != '\'') {
57 yylval->str = strdup(text);
58 } else {
59 /*
60 * If a text tag specified on
61 * contains opening single qui
62 * expected that the tag ends
63 * as well, like this:
64 * name=\'CPU_CLK_UNHALTED
65 * quotes need to be escaped t
66 * processing.
67 */
68 yylval->str = strndup(&text[1]
69 }
70
71 return token;
72 }
73
74 static int lc_str(yyscan_t scanner, const stru
75 {
76 return str(scanner, state->match_legac
77 }
78
79 /*
80 * This function is called when the parser get
81 *
82 * @cfg1 or @cfg2=config
83 *
84 * The leading '@' is stripped off before 'cfg
85 * bison. In the latter case it is necessary
86 * the PMU kernel driver can determine what co
87 * 'config'.
88 */
89 static int drv_str(yyscan_t scanner, int token
90 {
91 YYSTYPE *yylval = parse_events_get_lva
92 char *text = parse_events_get_text(sca
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
101 * location debugging. If __alloc is non-zero
102 * returned token's value.
103 */
104 #define REWIND(__alloc)
105 do {
106 YYSTYPE *__yylval = parse_events_get_l
107 char *text = parse_events_get_text(yys
108
109 if (__alloc)
110 __yylval->str = strdup(text);
111
112 yycolumn -= strlen(text);
113 yyless(0);
114 } while (0)
115
116 static int sym(yyscan_t scanner, int type, int
117 {
118 YYSTYPE *yylval = parse_events_get_lva
119
120 yylval->num = (type << 16) + config;
121 return type == PERF_TYPE_HARDWARE ? PE
122 }
123
124 static int tool(yyscan_t scanner, enum perf_to
125 {
126 YYSTYPE *yylval = parse_events_get_lva
127
128 yylval->num = event;
129 return PE_VALUE_SYM_TOOL;
130 }
131
132 static int term(yyscan_t scanner, enum parse_e
133 {
134 YYSTYPE *yylval = parse_events_get_lva
135
136 yylval->term_type = type;
137 return PE_TERM;
138 }
139
140 static int hw_term(yyscan_t scanner, int confi
141 {
142 YYSTYPE *yylval = parse_events_get_lva
143 char *text = parse_events_get_text(sca
144
145 yylval->hardware_term.str = strdup(tex
146 yylval->hardware_term.num = PERF_TYPE_
147 return PE_TERM_HW;
148 }
149
150 static void modifiers_error(struct parse_event
151 int pos, char mod_
152 {
153 struct parse_events_error *error = par
154 char *help = NULL;
155
156 if (asprintf(&help, "Duplicate modifie
157 parse_events_error__handle(err
158 }
159
160 static int modifiers(struct parse_events_state
161 {
162 YYSTYPE *yylval = parse_events_get_lva
163 char *text = parse_events_get_text(sca
164 struct parse_events_modifier mod = { .
165
166 for (size_t i = 0, n = strlen(text); i
167 #define CASE(c, field)
168 case c:
169 if (mod.field) {
170 modifiers_erro
171 return PE_ERRO
172 }
173 mod.field = true;
174 break
175
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
189 * 1 - SAMPLE_IP must
190 * 2 - SAMPLE_IP requ
191 * 3 - SAMPLE_IP must
192 *
193 * See also PERF_RECO
194 */
195 if (mod.precise > 3) {
196 struct parse_e
197 char *help = s
198
199 if (help) {
200 parse_
201
202 }
203 return PE_ERRO
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 CASE
217 }
218 yylval->mod = mod;
219 return PE_MODIFIER_EVENT;
220 }
221
222 #define YY_USER_ACTION
223 do {
224 yylloc->last_column = yylloc->first_c
225 yylloc->first_column = yycolumn;
226 yycolumn += yyleng;
227 } while (0);
228
229 #define USER_REJECT \
230 yycolumn -= yyleng; \
231 REJECT
232
233 %}
234
235 %x mem
236 %s config
237 %x event
238
239 group [^,{}/]*[{][^}]*[}][^,{}/]*
240 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
241 event [^,{}/]+
242
243 num_dec [0-9]+
244 num_hex 0x[a-fA-F0-9]{1,16}
245 num_raw_hex [a-fA-F0-9]{1,16}
246 name [a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*
247 name_tag [\'][a-zA-Z0-9_*?\[\]][a-zA-Z0
248 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
249 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?
250 /*
251 * If you add a modifier you need to update ch
252 * Also, the letters in modifier_event must no
253 */
254 modifier_event [ukhpPGHSDIWebR]{1,16}
255 modifier_bp [rwx]{1,3}
256 lc_type (L1-dcache|l1-d|l1d|L1-data|L1
257 lc_op_result (load|loads|read|store|stores|
258 digit [0-9]
259 non_digit [^0-9]
260
261 %%
262
263 %{
264 struct parse_events_state *_parse_stat
265 {
266 int start_token = _parse_state
267
268 if (start_token == PE_START_TE
269 BEGIN(config);
270 else if (start_token == PE_STA
271 BEGIN(event);
272
273 if (start_token) {
274 _parse_state->stoken =
275 /*
276 * The flex parser doe
277 * via the scan_string
278 * 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 whe
312 */
313 config { return term(yyscanne
314 config1 { return term(yyscanne
315 config2 { return term(yyscanne
316 config3 { return term(yyscanne
317 name { return term(yyscanne
318 period { return term(yyscanne
319 freq { return term(yyscanne
320 branch_type { return term(yyscanne
321 time { return term(yyscanne
322 call-graph { return term(yyscanne
323 stack-size { return term(yyscanne
324 max-stack { return term(yyscanne
325 nr { return term(yyscanne
326 inherit { return term(yyscanne
327 no-inherit { return term(yyscanne
328 overwrite { return term(yyscanne
329 no-overwrite { return term(yyscanne
330 percore { return term(yyscanne
331 aux-output { return term(yyscanne
332 aux-sample-size { return term(yyscanne
333 metric-id { return term(yyscanne
334 cpu-cycles|cycles
335 stalled-cycles-frontend|idle-cycles-frontend
336 stalled-cycles-backend|idle-cycles-backend
337 instructions
338 cache-references
339 cache-misses
340 branch-instructions|branches
341 branch-misses
342 bus-cycles
343 ref-cycles
344 r{num_raw_hex} { return str(yyscanner
345 r0x{num_raw_hex} { return str(yyscanner
346 , { return ','; }
347 "/" { BEGIN(INITIAL); retu
348 {lc_type} { return lc_st
349 {lc_type}-{lc_op_result} { return lc_st
350 {lc_type}-{lc_op_result}-{lc_op_result} { retu
351 {name_minus} { return str(yyscanner
352 @{drv_cfg_term} { return drv_str(yysca
353 }
354
355 <mem>{
356 {modifier_bp} { return str(yyscanner
357 /*
358 * The colon before memory access modi
359 * colon before event modifiers. Fortu
360 * are the same, so trailing context c
361 * cases.
362 */
363 ":"/{modifier_bp} { return PE_BP_COLON;
364 /*
365 * The slash before memory length can
366 * config terms. Fortunately config te
367 * digit, so trailing context can be u
368 */
369 "/"/{digit} { return PE_BP_SLASH;
370 "/"/{non_digit} { BEGIN(config); retur
371 {num_dec} { return value(_parse_
372 {num_hex} { return value(_parse_
373 /*
374 * We need to separate 'mem:' scanner
375 * modifier bits parsed out. Otherwise
376 * and we'd need to parse it manually.
377 * state we need to put the escaping c
378 */
379 . { unput(*yytext); BEGI
380 /*
381 * We destroy the scanner after reachi
382 * but anyway just to be sure get back
383 */
384 <<EOF>> { BEGIN(INITIAL); }
385 }
386
387 cpu-cycles|cycles
388 stalled-cycles-frontend|idle-cycles-frontend
389 stalled-cycles-backend|idle-cycles-backend
390 instructions
391 cache-references
392 cache-misses
393 branch-instructions|branches
394 branch-misses
395 bus-cycles
396 ref-cycles
397 cpu-clock
398 task-clock
399 page-faults|faults
400 minor-faults
401 major-faults
402 context-switches|cs
403 cpu-migrations|migrations
404 alignment-faults
405 emulation-faults
406 dummy
407 duration_time
408 user_time
409 system_time
410 bpf-output
411 cgroup-switches
412
413 {lc_type} { return str(y
414 {lc_type}-{lc_op_result} { return str(y
415 {lc_type}-{lc_op_result}-{lc_op_result} { retu
416 mem: { BEGIN(mem); return P
417 r{num_raw_hex} { return str(yyscanner
418 {num_dec} { return value(_parse_
419 {num_hex} { return value(_parse_
420
421 {modifier_event} { return modifiers(_pa
422 {name} { return str(yyscanner
423 {name_tag} { return str(yyscanner
424 "/" { BEGIN(config); retur
425 , { BEGIN(event); return
426 : { return ':'; }
427 "{" { BEGIN(event); return
428 "}" { return '}'; }
429 = { return '='; }
430 \n { }
431 . { }
432
433 %%
434
435 int parse_events_wrap(void *scanner __maybe_un
436 {
437 return 1;
438 }
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.