tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1
2%option reentrant
3%option bison-bridge
4%option prefix="parse_events_"
5%option stack
6%option bison-locations
7%option yylineno
8
9%{
10#include <errno.h>
11#include "../perf.h"
12#include "parse-events-bison.h"
13#include "parse-events.h"
14
15char *parse_events_get_text(yyscan_t yyscanner);
16YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
17
18static int __value(YYSTYPE *yylval, char *str, int base, int token)
19{
20 u64 num;
21
22 errno = 0;
23 num = strtoull(str, NULL, base);
24 if (errno)
25 return PE_ERROR;
26
27 yylval->num = num;
28 return token;
29}
30
31static int value(yyscan_t scanner, int base)
32{
33 YYSTYPE *yylval = parse_events_get_lval(scanner);
34 char *text = parse_events_get_text(scanner);
35
36 return __value(yylval, text, base, PE_VALUE);
37}
38
39static int raw(yyscan_t scanner)
40{
41 YYSTYPE *yylval = parse_events_get_lval(scanner);
42 char *text = parse_events_get_text(scanner);
43
44 return __value(yylval, text + 1, 16, PE_RAW);
45}
46
47static int str(yyscan_t scanner, int token)
48{
49 YYSTYPE *yylval = parse_events_get_lval(scanner);
50 char *text = parse_events_get_text(scanner);
51
52 yylval->str = strdup(text);
53 return token;
54}
55
56#define REWIND(__alloc) \
57do { \
58 YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
59 char *text = parse_events_get_text(yyscanner); \
60 \
61 if (__alloc) \
62 __yylval->str = strdup(text); \
63 \
64 yycolumn -= strlen(text); \
65 yyless(0); \
66} while (0)
67
68static int pmu_str_check(yyscan_t scanner)
69{
70 YYSTYPE *yylval = parse_events_get_lval(scanner);
71 char *text = parse_events_get_text(scanner);
72
73 yylval->str = strdup(text);
74 switch (perf_pmu__parse_check(text)) {
75 case PMU_EVENT_SYMBOL_PREFIX:
76 return PE_PMU_EVENT_PRE;
77 case PMU_EVENT_SYMBOL_SUFFIX:
78 return PE_PMU_EVENT_SUF;
79 case PMU_EVENT_SYMBOL:
80 return PE_KERNEL_PMU_EVENT;
81 default:
82 return PE_NAME;
83 }
84}
85
86static int sym(yyscan_t scanner, int type, int config)
87{
88 YYSTYPE *yylval = parse_events_get_lval(scanner);
89
90 yylval->num = (type << 16) + config;
91 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
92}
93
94static int term(yyscan_t scanner, int type)
95{
96 YYSTYPE *yylval = parse_events_get_lval(scanner);
97
98 yylval->num = type;
99 return PE_TERM;
100}
101
102#define YY_USER_ACTION \
103do { \
104 yylloc->last_column = yylloc->first_column; \
105 yylloc->first_column = yycolumn; \
106 yycolumn += yyleng; \
107} while (0);
108
109%}
110
111%x mem
112%s config
113%x event
114
115group [^,{}/]*[{][^}]*[}][^,{}/]*
116event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
117event [^,{}/]+
118bpf_object .*\.(o|bpf)
119bpf_source .*\.c
120
121num_dec [0-9]+
122num_hex 0x[a-fA-F0-9]+
123num_raw_hex [a-fA-F0-9]+
124name [a-zA-Z_*?][a-zA-Z0-9_*?.]*
125name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.]*
126/* If you add a modifier you need to update check_modifier() */
127modifier_event [ukhpPGHSDI]+
128modifier_bp [rwx]{1,3}
129
130%%
131
132%{
133 {
134 int start_token;
135
136 start_token = parse_events_get_extra(yyscanner);
137
138 if (start_token == PE_START_TERMS)
139 BEGIN(config);
140 else if (start_token == PE_START_EVENTS)
141 BEGIN(event);
142
143 if (start_token) {
144 parse_events_set_extra(NULL, yyscanner);
145 /*
146 * The flex parser does not init locations variable
147 * via the scan_string interface, so we need do the
148 * init in here.
149 */
150 yycolumn = 0;
151 return start_token;
152 }
153 }
154%}
155
156<event>{
157
158{group} {
159 BEGIN(INITIAL);
160 REWIND(0);
161 }
162
163{event_pmu} |
164{bpf_object} |
165{bpf_source} |
166{event} {
167 BEGIN(INITIAL);
168 REWIND(1);
169 return PE_EVENT_NAME;
170 }
171
172<<EOF>> {
173 BEGIN(INITIAL);
174 REWIND(0);
175 }
176
177}
178
179<config>{
180 /*
181 * Please update parse_events_formats_error_string any time
182 * new static term is added.
183 */
184config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
185config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
186config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
187name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
188period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
189freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
190branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
191time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
192call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
193stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
194inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
195no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
196, { return ','; }
197"/" { BEGIN(INITIAL); return '/'; }
198{name_minus} { return str(yyscanner, PE_NAME); }
199}
200
201<mem>{
202{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
203: { return ':'; }
204"/" { return '/'; }
205{num_dec} { return value(yyscanner, 10); }
206{num_hex} { return value(yyscanner, 16); }
207 /*
208 * We need to separate 'mem:' scanner part, in order to get specific
209 * modifier bits parsed out. Otherwise we would need to handle PE_NAME
210 * and we'd need to parse it manually. During the escape from <mem>
211 * state we need to put the escaping char back, so we dont miss it.
212 */
213. { unput(*yytext); BEGIN(INITIAL); }
214 /*
215 * We destroy the scanner after reaching EOF,
216 * but anyway just to be sure get back to INIT state.
217 */
218<<EOF>> { BEGIN(INITIAL); }
219}
220
221cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
222stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
223stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
224instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
225cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
226cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
227branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
228branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
229bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
230ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
231cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
232task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
233page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
234minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
235major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
236context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
237cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
238alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
239emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
240dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
241
242 /*
243 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
244 * Because the prefix cycles is mixed up with cpu-cycles.
245 * loads and stores are mixed up with cache event
246 */
247cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
248cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
249mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
250mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
251
252L1-dcache|l1-d|l1d|L1-data |
253L1-icache|l1-i|l1i|L1-instruction |
254LLC|L2 |
255dTLB|d-tlb|Data-TLB |
256iTLB|i-tlb|Instruction-TLB |
257branch|branches|bpu|btb|bpc |
258node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
259
260load|loads|read |
261store|stores|write |
262prefetch|prefetches |
263speculative-read|speculative-load |
264refs|Reference|ops|access |
265misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
266
267mem: { BEGIN(mem); return PE_PREFIX_MEM; }
268r{num_raw_hex} { return raw(yyscanner); }
269{num_dec} { return value(yyscanner, 10); }
270{num_hex} { return value(yyscanner, 16); }
271
272{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
273{bpf_object} { return str(yyscanner, PE_BPF_OBJECT); }
274{bpf_source} { return str(yyscanner, PE_BPF_SOURCE); }
275{name} { return pmu_str_check(yyscanner); }
276"/" { BEGIN(config); return '/'; }
277- { return '-'; }
278, { BEGIN(event); return ','; }
279: { return ':'; }
280"{" { BEGIN(event); return '{'; }
281"}" { return '}'; }
282= { return '='; }
283\n { }
284. { }
285
286%%
287
288int parse_events_wrap(void *scanner __maybe_unused)
289{
290 return 1;
291}