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-rw-r--r--tools/perf/util/parse-events.l378
1 files changed, 378 insertions, 0 deletions
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
new file mode 100644
index 000000000..5f761f3ed
--- /dev/null
+++ b/tools/perf/util/parse-events.l
@@ -0,0 +1,378 @@
+
+%option reentrant
+%option bison-bridge
+%option prefix="parse_events_"
+%option stack
+%option bison-locations
+%option yylineno
+%option reject
+
+%{
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "../perf.h"
+#include "parse-events.h"
+#include "parse-events-bison.h"
+
+char *parse_events_get_text(yyscan_t yyscanner);
+YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
+
+static int __value(YYSTYPE *yylval, char *str, int base, int token)
+{
+ u64 num;
+
+ errno = 0;
+ num = strtoull(str, NULL, base);
+ if (errno)
+ return PE_ERROR;
+
+ yylval->num = num;
+ return token;
+}
+
+static int value(yyscan_t scanner, int base)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+ char *text = parse_events_get_text(scanner);
+
+ return __value(yylval, text, base, PE_VALUE);
+}
+
+static int raw(yyscan_t scanner)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+ char *text = parse_events_get_text(scanner);
+
+ return __value(yylval, text + 1, 16, PE_RAW);
+}
+
+static int str(yyscan_t scanner, int token)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+ char *text = parse_events_get_text(scanner);
+
+ if (text[0] != '\'') {
+ yylval->str = strdup(text);
+ } else {
+ /*
+ * If a text tag specified on the command line
+ * contains opening single quite ' then it is
+ * expected that the tag ends with single quote
+ * as well, like this:
+ * name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
+ * quotes need to be escaped to bypass shell
+ * processing.
+ */
+ yylval->str = strndup(&text[1], strlen(text) - 2);
+ }
+
+ return token;
+}
+
+static bool isbpf_suffix(char *text)
+{
+ int len = strlen(text);
+
+ if (len < 2)
+ return false;
+ if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
+ text[len - 2] == '.')
+ return true;
+ if (len > 4 && !strcmp(text + len - 4, ".obj"))
+ return true;
+ return false;
+}
+
+static bool isbpf(yyscan_t scanner)
+{
+ char *text = parse_events_get_text(scanner);
+ struct stat st;
+
+ if (!isbpf_suffix(text))
+ return false;
+
+ return stat(text, &st) == 0;
+}
+
+/*
+ * This function is called when the parser gets two kind of input:
+ *
+ * @cfg1 or @cfg2=config
+ *
+ * The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
+ * bison. In the latter case it is necessary to keep the string intact so that
+ * the PMU kernel driver can determine what configurable is associated to
+ * 'config'.
+ */
+static int drv_str(yyscan_t scanner, int token)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+ char *text = parse_events_get_text(scanner);
+
+ /* Strip off the '@' */
+ yylval->str = strdup(text + 1);
+ return token;
+}
+
+#define REWIND(__alloc) \
+do { \
+ YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
+ char *text = parse_events_get_text(yyscanner); \
+ \
+ if (__alloc) \
+ __yylval->str = strdup(text); \
+ \
+ yycolumn -= strlen(text); \
+ yyless(0); \
+} while (0)
+
+static int pmu_str_check(yyscan_t scanner)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+ char *text = parse_events_get_text(scanner);
+
+ yylval->str = strdup(text);
+ switch (perf_pmu__parse_check(text)) {
+ case PMU_EVENT_SYMBOL_PREFIX:
+ return PE_PMU_EVENT_PRE;
+ case PMU_EVENT_SYMBOL_SUFFIX:
+ return PE_PMU_EVENT_SUF;
+ case PMU_EVENT_SYMBOL:
+ return PE_KERNEL_PMU_EVENT;
+ default:
+ return PE_NAME;
+ }
+}
+
+static int sym(yyscan_t scanner, int type, int config)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+
+ yylval->num = (type << 16) + config;
+ return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
+}
+
+static int term(yyscan_t scanner, int type)
+{
+ YYSTYPE *yylval = parse_events_get_lval(scanner);
+
+ yylval->num = type;
+ return PE_TERM;
+}
+
+#define YY_USER_ACTION \
+do { \
+ yylloc->last_column = yylloc->first_column; \
+ yylloc->first_column = yycolumn; \
+ yycolumn += yyleng; \
+} while (0);
+
+#define USER_REJECT \
+ yycolumn -= yyleng; \
+ REJECT
+
+%}
+
+%x mem
+%s config
+%x event
+%x array
+
+group [^,{}/]*[{][^}]*[}][^,{}/]*
+event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
+event [^,{}/]+
+bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
+bpf_source [^,{}]+\.c[a-zA-Z0-9._]*
+
+num_dec [0-9]+
+num_hex 0x[a-fA-F0-9]+
+num_raw_hex [a-fA-F0-9]+
+name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]*
+name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
+name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
+drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
+/* If you add a modifier you need to update check_modifier() */
+modifier_event [ukhpPGHSDIW]+
+modifier_bp [rwx]{1,3}
+
+%%
+
+%{
+ {
+ int start_token;
+
+ start_token = parse_events_get_extra(yyscanner);
+
+ if (start_token == PE_START_TERMS)
+ BEGIN(config);
+ else if (start_token == PE_START_EVENTS)
+ BEGIN(event);
+
+ if (start_token) {
+ parse_events_set_extra(NULL, yyscanner);
+ /*
+ * The flex parser does not init locations variable
+ * via the scan_string interface, so we need do the
+ * init in here.
+ */
+ yycolumn = 0;
+ return start_token;
+ }
+ }
+%}
+
+<event>{
+
+{group} {
+ BEGIN(INITIAL);
+ REWIND(0);
+ }
+
+{event_pmu} |
+{bpf_object} |
+{bpf_source} |
+{event} {
+ BEGIN(INITIAL);
+ REWIND(1);
+ return PE_EVENT_NAME;
+ }
+
+<<EOF>> {
+ BEGIN(INITIAL);
+ REWIND(0);
+ }
+
+}
+
+<array>{
+"]" { BEGIN(config); return ']'; }
+{num_dec} { return value(yyscanner, 10); }
+{num_hex} { return value(yyscanner, 16); }
+, { return ','; }
+"\.\.\." { return PE_ARRAY_RANGE; }
+}
+
+<config>{
+ /*
+ * Please update config_term_names when new static term is added.
+ */
+config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
+config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
+config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
+name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
+period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
+freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
+branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
+time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
+call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
+stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
+max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
+inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
+no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
+overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
+no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
+, { return ','; }
+"/" { BEGIN(INITIAL); return '/'; }
+{name_minus} { return str(yyscanner, PE_NAME); }
+\[all\] { return PE_ARRAY_ALL; }
+"[" { BEGIN(array); return '['; }
+@{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
+}
+
+<mem>{
+{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
+: { return ':'; }
+"/" { return '/'; }
+{num_dec} { return value(yyscanner, 10); }
+{num_hex} { return value(yyscanner, 16); }
+ /*
+ * We need to separate 'mem:' scanner part, in order to get specific
+ * modifier bits parsed out. Otherwise we would need to handle PE_NAME
+ * and we'd need to parse it manually. During the escape from <mem>
+ * state we need to put the escaping char back, so we dont miss it.
+ */
+. { unput(*yytext); BEGIN(INITIAL); }
+ /*
+ * We destroy the scanner after reaching EOF,
+ * but anyway just to be sure get back to INIT state.
+ */
+<<EOF>> { BEGIN(INITIAL); }
+}
+
+cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
+stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
+stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
+instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
+cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
+cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
+branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
+branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
+bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
+ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
+cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
+task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
+page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
+minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
+major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
+context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
+cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
+alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
+emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
+dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
+duration_time { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
+bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
+
+ /*
+ * We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
+ * Because the prefix cycles is mixed up with cpu-cycles.
+ * loads and stores are mixed up with cache event
+ */
+cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
+cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
+mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
+mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
+topdown-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
+
+L1-dcache|l1-d|l1d|L1-data |
+L1-icache|l1-i|l1i|L1-instruction |
+LLC|L2 |
+dTLB|d-tlb|Data-TLB |
+iTLB|i-tlb|Instruction-TLB |
+branch|branches|bpu|btb|bpc |
+node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
+
+load|loads|read |
+store|stores|write |
+prefetch|prefetches |
+speculative-read|speculative-load |
+refs|Reference|ops|access |
+misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
+
+mem: { BEGIN(mem); return PE_PREFIX_MEM; }
+r{num_raw_hex} { return raw(yyscanner); }
+{num_dec} { return value(yyscanner, 10); }
+{num_hex} { return value(yyscanner, 16); }
+
+{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
+{bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
+{bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
+{name} { return pmu_str_check(yyscanner); }
+{name_tag} { return str(yyscanner, PE_NAME); }
+"/" { BEGIN(config); return '/'; }
+- { return '-'; }
+, { BEGIN(event); return ','; }
+: { return ':'; }
+"{" { BEGIN(event); return '{'; }
+"}" { return '}'; }
+= { return '='; }
+\n { }
+. { }
+
+%%
+
+int parse_events_wrap(void *scanner __maybe_unused)
+{
+ return 1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 20:47:27 +0000