tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1%pure-parser
2%parse-param {void *_data}
3%parse-param {void *scanner}
4%lex-param {void* scanner}
5
6%{
7
8#define YYDEBUG 1
9
10#include <linux/compiler.h>
11#include <linux/list.h>
12#include <linux/types.h>
13#include "util.h"
14#include "parse-events.h"
15#include "parse-events-bison.h"
16
17extern int parse_events_lex (YYSTYPE* lvalp, void* scanner);
18
19#define ABORT_ON(val) \
20do { \
21 if (val) \
22 YYABORT; \
23} while (0)
24
25#define ALLOC_LIST(list) \
26do { \
27 list = malloc(sizeof(*list)); \
28 ABORT_ON(!list); \
29 INIT_LIST_HEAD(list); \
30} while (0)
31
32static inc_group_count(struct list_head *list,
33 struct parse_events_evlist *data)
34{
35 /* Count groups only have more than 1 members */
36 if (!list_is_last(list->next, list))
37 data->nr_groups++;
38}
39
40%}
41
42%token PE_START_EVENTS PE_START_TERMS
43%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_RAW PE_TERM
44%token PE_EVENT_NAME
45%token PE_NAME
46%token PE_MODIFIER_EVENT PE_MODIFIER_BP
47%token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
48%token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
49%token PE_ERROR
50%type <num> PE_VALUE
51%type <num> PE_VALUE_SYM_HW
52%type <num> PE_VALUE_SYM_SW
53%type <num> PE_RAW
54%type <num> PE_TERM
55%type <str> PE_NAME
56%type <str> PE_NAME_CACHE_TYPE
57%type <str> PE_NAME_CACHE_OP_RESULT
58%type <str> PE_MODIFIER_EVENT
59%type <str> PE_MODIFIER_BP
60%type <str> PE_EVENT_NAME
61%type <num> value_sym
62%type <head> event_config
63%type <term> event_term
64%type <head> event_pmu
65%type <head> event_legacy_symbol
66%type <head> event_legacy_cache
67%type <head> event_legacy_mem
68%type <head> event_legacy_tracepoint
69%type <head> event_legacy_numeric
70%type <head> event_legacy_raw
71%type <head> event_def
72%type <head> event_mod
73%type <head> event_name
74%type <head> event
75%type <head> events
76%type <head> group_def
77%type <head> group
78%type <head> groups
79
80%union
81{
82 char *str;
83 u64 num;
84 struct list_head *head;
85 struct parse_events_term *term;
86}
87%%
88
89start:
90PE_START_EVENTS start_events
91|
92PE_START_TERMS start_terms
93
94start_events: groups
95{
96 struct parse_events_evlist *data = _data;
97
98 parse_events_update_lists($1, &data->list);
99}
100
101groups:
102groups ',' group
103{
104 struct list_head *list = $1;
105 struct list_head *group = $3;
106
107 parse_events_update_lists(group, list);
108 $$ = list;
109}
110|
111groups ',' event
112{
113 struct list_head *list = $1;
114 struct list_head *event = $3;
115
116 parse_events_update_lists(event, list);
117 $$ = list;
118}
119|
120group
121|
122event
123
124group:
125group_def ':' PE_MODIFIER_EVENT
126{
127 struct list_head *list = $1;
128
129 ABORT_ON(parse_events__modifier_group(list, $3));
130 $$ = list;
131}
132|
133group_def
134
135group_def:
136PE_NAME '{' events '}'
137{
138 struct list_head *list = $3;
139
140 inc_group_count(list, _data);
141 parse_events__set_leader($1, list);
142 $$ = list;
143}
144|
145'{' events '}'
146{
147 struct list_head *list = $2;
148
149 inc_group_count(list, _data);
150 parse_events__set_leader(NULL, list);
151 $$ = list;
152}
153
154events:
155events ',' event
156{
157 struct list_head *event = $3;
158 struct list_head *list = $1;
159
160 parse_events_update_lists(event, list);
161 $$ = list;
162}
163|
164event
165
166event: event_mod
167
168event_mod:
169event_name PE_MODIFIER_EVENT
170{
171 struct list_head *list = $1;
172
173 /*
174 * Apply modifier on all events added by single event definition
175 * (there could be more events added for multiple tracepoint
176 * definitions via '*?'.
177 */
178 ABORT_ON(parse_events__modifier_event(list, $2, false));
179 $$ = list;
180}
181|
182event_name
183
184event_name:
185PE_EVENT_NAME event_def
186{
187 ABORT_ON(parse_events_name($2, $1));
188 free($1);
189 $$ = $2;
190}
191|
192event_def
193
194event_def: event_pmu |
195 event_legacy_symbol |
196 event_legacy_cache sep_dc |
197 event_legacy_mem |
198 event_legacy_tracepoint sep_dc |
199 event_legacy_numeric sep_dc |
200 event_legacy_raw sep_dc
201
202event_pmu:
203PE_NAME '/' event_config '/'
204{
205 struct parse_events_evlist *data = _data;
206 struct list_head *list;
207
208 ALLOC_LIST(list);
209 ABORT_ON(parse_events_add_pmu(list, &data->idx, $1, $3));
210 parse_events__free_terms($3);
211 $$ = list;
212}
213
214value_sym:
215PE_VALUE_SYM_HW
216|
217PE_VALUE_SYM_SW
218
219event_legacy_symbol:
220value_sym '/' event_config '/'
221{
222 struct parse_events_evlist *data = _data;
223 struct list_head *list;
224 int type = $1 >> 16;
225 int config = $1 & 255;
226
227 ALLOC_LIST(list);
228 ABORT_ON(parse_events_add_numeric(list, &data->idx,
229 type, config, $3));
230 parse_events__free_terms($3);
231 $$ = list;
232}
233|
234value_sym sep_slash_dc
235{
236 struct parse_events_evlist *data = _data;
237 struct list_head *list;
238 int type = $1 >> 16;
239 int config = $1 & 255;
240
241 ALLOC_LIST(list);
242 ABORT_ON(parse_events_add_numeric(list, &data->idx,
243 type, config, NULL));
244 $$ = list;
245}
246
247event_legacy_cache:
248PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT
249{
250 struct parse_events_evlist *data = _data;
251 struct list_head *list;
252
253 ALLOC_LIST(list);
254 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, $5));
255 $$ = list;
256}
257|
258PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT
259{
260 struct parse_events_evlist *data = _data;
261 struct list_head *list;
262
263 ALLOC_LIST(list);
264 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, NULL));
265 $$ = list;
266}
267|
268PE_NAME_CACHE_TYPE
269{
270 struct parse_events_evlist *data = _data;
271 struct list_head *list;
272
273 ALLOC_LIST(list);
274 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, NULL, NULL));
275 $$ = list;
276}
277
278event_legacy_mem:
279PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
280{
281 struct parse_events_evlist *data = _data;
282 struct list_head *list;
283
284 ALLOC_LIST(list);
285 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
286 (void *) $2, $4));
287 $$ = list;
288}
289|
290PE_PREFIX_MEM PE_VALUE sep_dc
291{
292 struct parse_events_evlist *data = _data;
293 struct list_head *list;
294
295 ALLOC_LIST(list);
296 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
297 (void *) $2, NULL));
298 $$ = list;
299}
300
301event_legacy_tracepoint:
302PE_NAME '-' PE_NAME ':' PE_NAME
303{
304 struct parse_events_evlist *data = _data;
305 struct list_head *list;
306 char sys_name[128];
307 snprintf(&sys_name, 128, "%s-%s", $1, $3);
308
309 ALLOC_LIST(list);
310 ABORT_ON(parse_events_add_tracepoint(list, &data->idx, &sys_name, $5));
311 $$ = list;
312}
313|
314PE_NAME ':' PE_NAME
315{
316 struct parse_events_evlist *data = _data;
317 struct list_head *list;
318
319 ALLOC_LIST(list);
320 ABORT_ON(parse_events_add_tracepoint(list, &data->idx, $1, $3));
321 $$ = list;
322}
323
324event_legacy_numeric:
325PE_VALUE ':' PE_VALUE
326{
327 struct parse_events_evlist *data = _data;
328 struct list_head *list;
329
330 ALLOC_LIST(list);
331 ABORT_ON(parse_events_add_numeric(list, &data->idx, (u32)$1, $3, NULL));
332 $$ = list;
333}
334
335event_legacy_raw:
336PE_RAW
337{
338 struct parse_events_evlist *data = _data;
339 struct list_head *list;
340
341 ALLOC_LIST(list);
342 ABORT_ON(parse_events_add_numeric(list, &data->idx,
343 PERF_TYPE_RAW, $1, NULL));
344 $$ = list;
345}
346
347start_terms: event_config
348{
349 struct parse_events_terms *data = _data;
350 data->terms = $1;
351}
352
353event_config:
354event_config ',' event_term
355{
356 struct list_head *head = $1;
357 struct parse_events_term *term = $3;
358
359 ABORT_ON(!head);
360 list_add_tail(&term->list, head);
361 $$ = $1;
362}
363|
364event_term
365{
366 struct list_head *head = malloc(sizeof(*head));
367 struct parse_events_term *term = $1;
368
369 ABORT_ON(!head);
370 INIT_LIST_HEAD(head);
371 list_add_tail(&term->list, head);
372 $$ = head;
373}
374
375event_term:
376PE_NAME '=' PE_NAME
377{
378 struct parse_events_term *term;
379
380 ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
381 $1, $3));
382 $$ = term;
383}
384|
385PE_NAME '=' PE_VALUE
386{
387 struct parse_events_term *term;
388
389 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
390 $1, $3));
391 $$ = term;
392}
393|
394PE_NAME '=' PE_VALUE_SYM_HW
395{
396 struct parse_events_term *term;
397 int config = $3 & 255;
398
399 ABORT_ON(parse_events_term__sym_hw(&term, $1, config));
400 $$ = term;
401}
402|
403PE_NAME
404{
405 struct parse_events_term *term;
406
407 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
408 $1, 1));
409 $$ = term;
410}
411|
412PE_VALUE_SYM_HW
413{
414 struct parse_events_term *term;
415 int config = $1 & 255;
416
417 ABORT_ON(parse_events_term__sym_hw(&term, NULL, config));
418 $$ = term;
419}
420|
421PE_TERM '=' PE_NAME
422{
423 struct parse_events_term *term;
424
425 ABORT_ON(parse_events_term__str(&term, (int)$1, NULL, $3));
426 $$ = term;
427}
428|
429PE_TERM '=' PE_VALUE
430{
431 struct parse_events_term *term;
432
433 ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, $3));
434 $$ = term;
435}
436|
437PE_TERM
438{
439 struct parse_events_term *term;
440
441 ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, 1));
442 $$ = term;
443}
444
445sep_dc: ':' |
446
447sep_slash_dc: '/' | ':' |
448
449%%
450
451void parse_events_error(void *data __maybe_unused, void *scanner __maybe_unused,
452 char const *msg __maybe_unused)
453{
454}