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
__value(YYSTYPE * yylval,char * str,int base,int token)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
value(yyscan_t scanner,int base)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
str(yyscan_t scanner,int token)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
raw(yyscan_t scanner)66 static int raw(yyscan_t scanner)
67 {
68 YYSTYPE *yylval = parse_events_get_lval(scanner);
69 char *text = parse_events_get_text(scanner);
70
71 if (perf_pmu__parse_check(text) == PMU_EVENT_SYMBOL)
72 return str(scanner, PE_NAME);
73
74 return __value(yylval, text + 1, 16, PE_RAW);
75 }
76
isbpf_suffix(char * text)77 static bool isbpf_suffix(char *text)
78 {
79 int len = strlen(text);
80
81 if (len < 2)
82 return false;
83 if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
84 text[len - 2] == '.')
85 return true;
86 if (len > 4 && !strcmp(text + len - 4, ".obj"))
87 return true;
88 return false;
89 }
90
isbpf(yyscan_t scanner)91 static bool isbpf(yyscan_t scanner)
92 {
93 char *text = parse_events_get_text(scanner);
94 struct stat st;
95
96 if (!isbpf_suffix(text))
97 return false;
98
99 return stat(text, &st) == 0;
100 }
101
102 /*
103 * This function is called when the parser gets two kind of input:
104 *
105 * @cfg1 or @cfg2=config
106 *
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
110 * 'config'.
111 */
drv_str(yyscan_t scanner,int token)112 static int drv_str(yyscan_t scanner, int token)
113 {
114 YYSTYPE *yylval = parse_events_get_lval(scanner);
115 char *text = parse_events_get_text(scanner);
116
117 /* Strip off the '@' */
118 yylval->str = strdup(text + 1);
119 return token;
120 }
121
122 #define REWIND(__alloc) \
123 do { \
124 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
125 char *text = parse_events_get_text(yyscanner); \
126 \
127 if (__alloc) \
128 __yylval->str = strdup(text); \
129 \
130 yycolumn -= strlen(text); \
131 yyless(0); \
132 } while (0)
133
pmu_str_check(yyscan_t scanner,struct parse_events_state * parse_state)134 static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_state)
135 {
136 YYSTYPE *yylval = parse_events_get_lval(scanner);
137 char *text = parse_events_get_text(scanner);
138
139 yylval->str = strdup(text);
140
141 /*
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.
146 */
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;
157 default:
158 return parse_state->fake_pmu && !strchr(text,'!')
159 ? PE_PMU_EVENT_FAKE : PE_NAME;
160 }
161 }
162
sym(yyscan_t scanner,int type,int config)163 static int sym(yyscan_t scanner, int type, int config)
164 {
165 YYSTYPE *yylval = parse_events_get_lval(scanner);
166
167 yylval->num = (type << 16) + config;
168 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
169 }
170
tool(yyscan_t scanner,enum perf_tool_event event)171 static int tool(yyscan_t scanner, enum perf_tool_event event)
172 {
173 YYSTYPE *yylval = parse_events_get_lval(scanner);
174
175 yylval->num = event;
176 return PE_VALUE_SYM_TOOL;
177 }
178
term(yyscan_t scanner,int type)179 static int term(yyscan_t scanner, int type)
180 {
181 YYSTYPE *yylval = parse_events_get_lval(scanner);
182
183 yylval->num = type;
184 return PE_TERM;
185 }
186
187 #define YY_USER_ACTION \
188 do { \
189 yylloc->last_column = yylloc->first_column; \
190 yylloc->first_column = yycolumn; \
191 yycolumn += yyleng; \
192 } while (0);
193
194 #define USER_REJECT \
195 yycolumn -= yyleng; \
196 REJECT
197
198 %}
199
200 %x mem
201 %s config
202 %x event
203 %x array
204
205 group [^,{}/]*[{][^}]*[}][^,{}/]*
206 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
207 event [^,{}/]+
208 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
209 bpf_source [^,{}]+\.c[a-zA-Z0-9._]*
210
211 num_dec [0-9]+
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}
221
222 %%
223
224 %{
225 struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);
226
227 {
228 int start_token = _parse_state->stoken;
229
230 if (start_token == PE_START_TERMS)
231 BEGIN(config);
232 else if (start_token == PE_START_EVENTS)
233 BEGIN(event);
234
235 if (start_token) {
236 _parse_state->stoken = 0;
237 /*
238 * The flex parser does not init locations variable
239 * via the scan_string interface, so we need do the
240 * init in here.
241 */
242 yycolumn = 0;
243 return start_token;
244 }
245 }
246 %}
247
248 <event>{
249
250 {group} {
251 BEGIN(INITIAL);
252 REWIND(0);
253 }
254
255 {event_pmu} |
256 {bpf_object} |
257 {bpf_source} |
258 {event} {
259 BEGIN(INITIAL);
260 REWIND(1);
261 return PE_EVENT_NAME;
262 }
263
264 <<EOF>> {
265 BEGIN(INITIAL);
266 REWIND(0);
267 }
268 , {
269 return ',';
270 }
271 }
272
273 <array>{
274 "]" { BEGIN(config); return ']'; }
275 {num_dec} { return value(yyscanner, 10); }
276 {num_hex} { return value(yyscanner, 16); }
277 , { return ','; }
278 "\.\.\." { return PE_ARRAY_RANGE; }
279 }
280
281 <config>{
282 /*
283 * Please update config_term_names when new static term is added.
284 */
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); }
307 , { return ','; }
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); }
313 }
314
315 <mem>{
316 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
317 : { return ':'; }
318 "/" { return '/'; }
319 {num_dec} { return value(yyscanner, 10); }
320 {num_hex} { return value(yyscanner, 16); }
321 /*
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.
326 */
327 . { unput(*yytext); BEGIN(INITIAL); }
328 /*
329 * We destroy the scanner after reaching EOF,
330 * but anyway just to be sure get back to INIT state.
331 */
332 <<EOF>> { BEGIN(INITIAL); }
333 }
334
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); }
360
361 /*
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
365 */
366 cycles-ct |
367 cycles-t |
368 mem-loads |
369 mem-loads-aux |
370 mem-stores |
371 topdown-[a-z-]+ |
372 tx-capacity-[a-z-]+ |
373 el-capacity-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
374
375 L1-dcache|l1-d|l1d|L1-data |
376 L1-icache|l1-i|l1i|L1-instruction |
377 LLC|L2 |
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); }
382
383 load|loads|read |
384 store|stores|write |
385 prefetch|prefetches |
386 speculative-read|speculative-load |
387 refs|Reference|ops|access |
388 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
389
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); }
394
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 '/'; }
401 - { return '-'; }
402 , { BEGIN(event); return ','; }
403 : { return ':'; }
404 "{" { BEGIN(event); return '{'; }
405 "}" { return '}'; }
406 = { return '='; }
407 \n { }
408 . { }
409
410 %%
411
412 int parse_events_wrap(void *scanner __maybe_unused)
413 {
414 return 1;
415 }
416
