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
7%{
8#include <errno.h>
9#include "../perf.h"
10#include "parse-events-bison.h"
11#include "parse-events.h"
12
13char *parse_events_get_text(yyscan_t yyscanner);
14YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
15
16static int __value(YYSTYPE *yylval, char *str, int base, int token)
17{
18 u64 num;
19
20 errno = 0;
21 num = strtoull(str, NULL, base);
22 if (errno)
23 return PE_ERROR;
24
25 yylval->num = num;
26 return token;
27}
28
29static int value(yyscan_t scanner, int base)
30{
31 YYSTYPE *yylval = parse_events_get_lval(scanner);
32 char *text = parse_events_get_text(scanner);
33
34 return __value(yylval, text, base, PE_VALUE);
35}
36
37static int raw(yyscan_t scanner)
38{
39 YYSTYPE *yylval = parse_events_get_lval(scanner);
40 char *text = parse_events_get_text(scanner);
41
42 return __value(yylval, text + 1, 16, PE_RAW);
43}
44
45static int str(yyscan_t scanner, int token)
46{
47 YYSTYPE *yylval = parse_events_get_lval(scanner);
48 char *text = parse_events_get_text(scanner);
49
50 yylval->str = strdup(text);
51 return token;
52}
53
54static int pmu_str_check(yyscan_t scanner)
55{
56 YYSTYPE *yylval = parse_events_get_lval(scanner);
57 char *text = parse_events_get_text(scanner);
58
59 yylval->str = strdup(text);
60 switch (perf_pmu__parse_check(text)) {
61 case PMU_EVENT_SYMBOL_PREFIX:
62 return PE_PMU_EVENT_PRE;
63 case PMU_EVENT_SYMBOL_SUFFIX:
64 return PE_PMU_EVENT_SUF;
65 case PMU_EVENT_SYMBOL:
66 return PE_KERNEL_PMU_EVENT;
67 default:
68 return PE_NAME;
69 }
70}
71
72static int sym(yyscan_t scanner, int type, int config)
73{
74 YYSTYPE *yylval = parse_events_get_lval(scanner);
75
76 yylval->num = (type << 16) + config;
77 return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
78}
79
80static int term(yyscan_t scanner, int type)
81{
82 YYSTYPE *yylval = parse_events_get_lval(scanner);
83
84 yylval->num = type;
85 return PE_TERM;
86}
87
88%}
89
90%x mem
91%s config
92%x event
93
94group [^,{}/]*[{][^}]*[}][^,{}/]*
95event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
96event [^,{}/]+
97
98num_dec [0-9]+
99num_hex 0x[a-fA-F0-9]+
100num_raw_hex [a-fA-F0-9]+
101name [a-zA-Z_*?][a-zA-Z0-9_*?]*
102name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?]*
103/* If you add a modifier you need to update check_modifier() */
104modifier_event [ukhpGHSDI]+
105modifier_bp [rwx]{1,3}
106
107%%
108
109%{
110 {
111 int start_token;
112
113 start_token = parse_events_get_extra(yyscanner);
114
115 if (start_token == PE_START_TERMS)
116 BEGIN(config);
117 else if (start_token == PE_START_EVENTS)
118 BEGIN(event);
119
120 if (start_token) {
121 parse_events_set_extra(NULL, yyscanner);
122 return start_token;
123 }
124 }
125%}
126
127<event>{
128
129{group} {
130 BEGIN(INITIAL); yyless(0);
131 }
132
133{event_pmu} |
134{event} {
135 str(yyscanner, PE_EVENT_NAME);
136 BEGIN(INITIAL); yyless(0);
137 return PE_EVENT_NAME;
138 }
139
140. |
141<<EOF>> {
142 BEGIN(INITIAL); yyless(0);
143 }
144
145}
146
147<config>{
148config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
149config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
150config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
151name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
152period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
153branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
154, { return ','; }
155"/" { BEGIN(INITIAL); return '/'; }
156{name_minus} { return str(yyscanner, PE_NAME); }
157}
158
159<mem>{
160{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
161: { return ':'; }
162"/" { return '/'; }
163{num_dec} { return value(yyscanner, 10); }
164{num_hex} { return value(yyscanner, 16); }
165 /*
166 * We need to separate 'mem:' scanner part, in order to get specific
167 * modifier bits parsed out. Otherwise we would need to handle PE_NAME
168 * and we'd need to parse it manually. During the escape from <mem>
169 * state we need to put the escaping char back, so we dont miss it.
170 */
171. { unput(*yytext); BEGIN(INITIAL); }
172 /*
173 * We destroy the scanner after reaching EOF,
174 * but anyway just to be sure get back to INIT state.
175 */
176<<EOF>> { BEGIN(INITIAL); }
177}
178
179cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
180stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
181stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
182instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
183cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
184cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
185branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
186branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
187bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
188ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
189cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
190task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
191page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
192minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
193major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
194context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
195cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
196alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
197emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
198dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
199
200 /*
201 * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
202 * Because the prefix cycles is mixed up with cpu-cycles.
203 * loads and stores are mixed up with cache event
204 */
205cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
206cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
207mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
208mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
209
210L1-dcache|l1-d|l1d|L1-data |
211L1-icache|l1-i|l1i|L1-instruction |
212LLC|L2 |
213dTLB|d-tlb|Data-TLB |
214iTLB|i-tlb|Instruction-TLB |
215branch|branches|bpu|btb|bpc |
216node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
217
218load|loads|read |
219store|stores|write |
220prefetch|prefetches |
221speculative-read|speculative-load |
222refs|Reference|ops|access |
223misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
224
225mem: { BEGIN(mem); return PE_PREFIX_MEM; }
226r{num_raw_hex} { return raw(yyscanner); }
227{num_dec} { return value(yyscanner, 10); }
228{num_hex} { return value(yyscanner, 16); }
229
230{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
231{name} { return pmu_str_check(yyscanner); }
232"/" { BEGIN(config); return '/'; }
233- { return '-'; }
234, { BEGIN(event); return ','; }
235: { return ':'; }
236"{" { BEGIN(event); return '{'; }
237"}" { return '}'; }
238= { return '='; }
239\n { }
240. { }
241
242%%
243
244int parse_events_wrap(void *scanner __maybe_unused)
245{
246 return 1;
247}