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 "../perf.h"
16 #include "parse-events.h"
17 #include "parse-events-bison.h"
18 #include "evsel.h"
19
20 char *parse_events_get_text(yyscan_t yyscanner);
21 YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
22
__value(YYSTYPE * yylval,char * str,int base,int token)23 static int __value(YYSTYPE *yylval, char *str, int base, int token)
24 {
25 u64 num;
26
27 errno = 0;
28 num = strtoull(str, NULL, base);
29 if (errno)
30 return PE_ERROR;
31
32 yylval->num = num;
33 return token;
34 }
35
value(yyscan_t scanner,int base)36 static int value(yyscan_t scanner, int base)
37 {
38 YYSTYPE *yylval = parse_events_get_lval(scanner);
39 char *text = parse_events_get_text(scanner);
40
41 return __value(yylval, text, base, PE_VALUE);
42 }
43
raw(yyscan_t scanner)44 static int raw(yyscan_t scanner)
45 {
46 YYSTYPE *yylval = parse_events_get_lval(scanner);
47 char *text = parse_events_get_text(scanner);
48
49 return __value(yylval, text + 1, 16, PE_RAW);
50 }
51
str(yyscan_t scanner,int token)52 static int str(yyscan_t scanner, int token)
53 {
54 YYSTYPE *yylval = parse_events_get_lval(scanner);
55 char *text = parse_events_get_text(scanner);
56
57 if (text[0] != '\'') {
58 yylval->str = strdup(text);
59 } else {
60 /*
61 * If a text tag specified on the command line
62 * contains opening single quite ' then it is
63 * expected that the tag ends with single quote
64 * as well, like this:
65 * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
66 * quotes need to be escaped to bypass shell
67 * processing.
68 */
69 yylval->str = strndup(&text[1], strlen(text) - 2);
70 }
71
72 return token;
73 }
74
isbpf_suffix(char * text)75 static bool isbpf_suffix(char *text)
76 {
77 int len = strlen(text);
78
79 if (len < 2)
80 return false;
81 if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
82 text[len - 2] == '.')
83 return true;
84 if (len > 4 && !strcmp(text + len - 4, ".obj"))
85 return true;
86 return false;
87 }
88
isbpf(yyscan_t scanner)89 static bool isbpf(yyscan_t scanner)
90 {
91 char *text = parse_events_get_text(scanner);
92 struct stat st;
93
94 if (!isbpf_suffix(text))
95 return false;
96
97 return stat(text, &st) == 0;
98 }
99
100 /*
101 * This function is called when the parser gets two kind of input:
102 *
103 * @cfg1 or @cfg2=config
104 *
105 * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
106 * bison. In the latter case it is necessary to keep the string intact so that
107 * the PMU kernel driver can determine what configurable is associated to
108 * 'config'.
109 */
drv_str(yyscan_t scanner,int token)110 static int drv_str(yyscan_t scanner, int token)
111 {
112 YYSTYPE *yylval = parse_events_get_lval(scanner);
113 char *text = parse_events_get_text(scanner);
114
115 /* Strip off the '@' */
116 yylval->str = strdup(text + 1);
117 return token;
118 }
119
120 #define REWIND(__alloc) \
121 do { \
122 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
123 char *text = parse_events_get_text(yyscanner); \
124 \
125 if (__alloc) \
126 __yylval->str = strdup(text); \
127 \
128 yycolumn -= strlen(text); \
129 yyless(0); \
130 } while (0)
131
pmu_str_check(yyscan_t scanner)132 static int pmu_str_check(yyscan_t scanner)
133 {
134 YYSTYPE *yylval = parse_events_get_lval(scanner);
135 char *text = parse_events_get_text(scanner);
136
137 yylval->str = strdup(text);
138 switch (perf_pmu__parse_check(text)) {
139 case PMU_EVENT_SYMBOL_PREFIX:
140 return PE_PMU_EVENT_PRE;
141 case PMU_EVENT_SYMBOL_SUFFIX:
142 return PE_PMU_EVENT_SUF;
143 case PMU_EVENT_SYMBOL:
144 return PE_KERNEL_PMU_EVENT;
145 default:
146 return PE_NAME;
147 }
148 }
149
sym(yyscan_t scanner,int type,int config)150 static int sym(yyscan_t scanner, int type, int config)
151 {
152 YYSTYPE *yylval = parse_events_get_lval(scanner);
153
154 yylval->num = (type << 16) + config;
155 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
156 }
157
tool(yyscan_t scanner,enum perf_tool_event event)158 static int tool(yyscan_t scanner, enum perf_tool_event event)
159 {
160 YYSTYPE *yylval = parse_events_get_lval(scanner);
161
162 yylval->num = event;
163 return PE_VALUE_SYM_TOOL;
164 }
165
term(yyscan_t scanner,int type)166 static int term(yyscan_t scanner, int type)
167 {
168 YYSTYPE *yylval = parse_events_get_lval(scanner);
169
170 yylval->num = type;
171 return PE_TERM;
172 }
173
174 #define YY_USER_ACTION \
175 do { \
176 yylloc->last_column = yylloc->first_column; \
177 yylloc->first_column = yycolumn; \
178 yycolumn += yyleng; \
179 } while (0);
180
181 #define USER_REJECT \
182 yycolumn -= yyleng; \
183 REJECT
184
185 %}
186
187 %x mem
188 %s config
189 %x event
190 %x array
191
192 group [^,{}/]*[{][^}]*[}][^,{}/]*
193 event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
194 event [^,{}/]+
195 bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
196 bpf_source [^,{}]+\.c[a-zA-Z0-9._]*
197
198 num_dec [0-9]+
199 num_hex 0x[a-fA-F0-9]+
200 num_raw_hex [a-fA-F0-9]+
201 name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]*
202 name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
203 name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
204 drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
205 /* If you add a modifier you need to update check_modifier() */
206 modifier_event [ukhpPGHSDIW]+
207 modifier_bp [rwx]{1,3}
208
209 %%
210
211 %{
212 {
213 int start_token;
214
215 start_token = parse_events_get_extra(yyscanner);
216
217 if (start_token == PE_START_TERMS)
218 BEGIN(config);
219 else if (start_token == PE_START_EVENTS)
220 BEGIN(event);
221
222 if (start_token) {
223 parse_events_set_extra(NULL, yyscanner);
224 /*
225 * The flex parser does not init locations variable
226 * via the scan_string interface, so we need do the
227 * init in here.
228 */
229 yycolumn = 0;
230 return start_token;
231 }
232 }
233 %}
234
235 <event>{
236
237 {group} {
238 BEGIN(INITIAL);
239 REWIND(0);
240 }
241
242 {event_pmu} |
243 {bpf_object} |
244 {bpf_source} |
245 {event} {
246 BEGIN(INITIAL);
247 REWIND(1);
248 return PE_EVENT_NAME;
249 }
250
251 <<EOF>> {
252 BEGIN(INITIAL);
253 REWIND(0);
254 }
255
256 }
257
258 <array>{
259 "]" { BEGIN(config); return ']'; }
260 {num_dec} { return value(yyscanner, 10); }
261 {num_hex} { return value(yyscanner, 16); }
262 , { return ','; }
263 "\.\.\." { return PE_ARRAY_RANGE; }
264 }
265
266 <config>{
267 /*
268 * Please update config_term_names when new static term is added.
269 */
270 config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
271 config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
272 config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
273 name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
274 period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
275 freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
276 branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
277 time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
278 call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
279 stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
280 max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
281 nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }
282 inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
283 no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
284 overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
285 no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
286 percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
287 aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
288 , { return ','; }
289 "/" { BEGIN(INITIAL); return '/'; }
290 {name_minus} { return str(yyscanner, PE_NAME); }
291 \[all\] { return PE_ARRAY_ALL; }
292 "[" { BEGIN(array); return '['; }
293 @{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
294 }
295
296 <mem>{
297 {modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
298 : { return ':'; }
299 "/" { return '/'; }
300 {num_dec} { return value(yyscanner, 10); }
301 {num_hex} { return value(yyscanner, 16); }
302 /*
303 * We need to separate 'mem:' scanner part, in order to get specific
304 * modifier bits parsed out. Otherwise we would need to handle PE_NAME
305 * and we'd need to parse it manually. During the escape from <mem>
306 * state we need to put the escaping char back, so we dont miss it.
307 */
308 . { unput(*yytext); BEGIN(INITIAL); }
309 /*
310 * We destroy the scanner after reaching EOF,
311 * but anyway just to be sure get back to INIT state.
312 */
313 <<EOF>> { BEGIN(INITIAL); }
314 }
315
316 cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
317 stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
318 stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
319 instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
320 cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
321 cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
322 branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
323 branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
324 bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
325 ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
326 cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
327 task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
328 page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
329 minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
330 major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
331 context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
332 cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
333 alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
334 emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
335 dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
336 duration_time { return tool(yyscanner, PERF_TOOL_DURATION_TIME); }
337 bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
338
339 /*
340 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
341 * Because the prefix cycles is mixed up with cpu-cycles.
342 * loads and stores are mixed up with cache event
343 */
344 cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
345 cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
346 mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
347 mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
348 topdown-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
349
350 L1-dcache|l1-d|l1d|L1-data |
351 L1-icache|l1-i|l1i|L1-instruction |
352 LLC|L2 |
353 dTLB|d-tlb|Data-TLB |
354 iTLB|i-tlb|Instruction-TLB |
355 branch|branches|bpu|btb|bpc |
356 node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
357
358 load|loads|read |
359 store|stores|write |
360 prefetch|prefetches |
361 speculative-read|speculative-load |
362 refs|Reference|ops|access |
363 misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
364
365 mem: { BEGIN(mem); return PE_PREFIX_MEM; }
366 r{num_raw_hex} { return raw(yyscanner); }
367 {num_dec} { return value(yyscanner, 10); }
368 {num_hex} { return value(yyscanner, 16); }
369
370 {modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
371 {bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
372 {bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
373 {name} { return pmu_str_check(yyscanner); }
374 {name_tag} { return str(yyscanner, PE_NAME); }
375 "/" { BEGIN(config); return '/'; }
376 - { return '-'; }
377 , { BEGIN(event); return ','; }
378 : { return ':'; }
379 "{" { BEGIN(event); return '{'; }
380 "}" { return '}'; }
381 = { return '='; }
382 \n { }
383 . { }
384
385 %%
386
387 int parse_events_wrap(void *scanner __maybe_unused)
388 {
389 return 1;
390 }
391