%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 "parse-events.h"
#include "parse-events-bison.h"
#include "evsel.h"
char *parse_events_get_text(yyscan_t yyscanner);
YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
int parse_events_get_column(yyscan_t yyscanner);
int parse_events_get_leng(yyscan_t yyscanner);
static int get_column(yyscan_t scanner)
{
return parse_events_get_column(scanner) - parse_events_get_leng(scanner);
}
static int value(struct parse_events_state *parse_state, yyscan_t scanner, int base)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
u64 num;
errno = 0;
num = strtoull(text, NULL, base);
if (errno) {
struct parse_events_error *error = parse_state->error;
char *help = NULL;
if (asprintf(&help, "Bad base %d number \"%s\"", base, text) > 0)
parse_events_error__handle(error, get_column(scanner), help , NULL);
return PE_ERROR;
}
yylval->num = num;
return PE_VALUE;
}
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 int lc_str(yyscan_t scanner, const struct parse_events_state *state)
{
return str(scanner, state->match_legacy_cache_terms ? PE_LEGACY_CACHE : PE_NAME);
}
/*
* 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;
}
/*
* Use yyless to return all the characaters to the input. Update the column for
* location debugging. If __alloc is non-zero set yylval to the text for the
* returned token's value.
*/
#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 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 tool(yyscan_t scanner, enum perf_tool_event event)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
yylval->num = event;
return PE_VALUE_SYM_TOOL;
}
static int term(yyscan_t scanner, enum parse_events__term_type type)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
yylval->term_type = type;
return PE_TERM;
}
static int hw_term(yyscan_t scanner, int config)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
yylval->hardware_term.str = strdup(text);
yylval->hardware_term.num = PERF_TYPE_HARDWARE + config;
return PE_TERM_HW;
}
static void modifiers_error(struct parse_events_state *parse_state, yyscan_t scanner,
int pos, char mod_char, const char *mod_name)
{
struct parse_events_error *error = parse_state->error;
char *help = NULL;
if (asprintf(&help, "Duplicate modifier '%c' (%s)", mod_char, mod_name) > 0)
parse_events_error__handle(error, get_column(scanner) + pos, help , NULL);
}
static int modifiers(struct parse_events_state *parse_state, yyscan_t scanner)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
struct parse_events_modifier mod = { .precise = 0, };
for (size_t i = 0, n = strlen(text); i < n; i++) {
#define CASE(c, field) \
case c: \
if (mod.field) { \
modifiers_error(parse_state, scanner, i, c, #field); \
return PE_ERROR; \
} \
mod.field = true; \
break
switch (text[i]) {
CASE('u', user);
CASE('k', kernel);
CASE('h', hypervisor);
CASE('I', non_idle);
CASE('G', guest);
CASE('H', host);
case 'p':
mod.precise++;
/*
* precise ip:
*
* 0 - SAMPLE_IP can have arbitrary skid
* 1 - SAMPLE_IP must have constant skid
* 2 - SAMPLE_IP requested to have 0 skid
* 3 - SAMPLE_IP must have 0 skid
*
* See also PERF_RECORD_MISC_EXACT_IP
*/
if (mod.precise > 3) {
struct parse_events_error *error = parse_state->error;
char *help = strdup("Maximum precise value is 3");
if (help) {
parse_events_error__handle(error, get_column(scanner) + i,
help , NULL);
}
return PE_ERROR;
}
break;
CASE('P', precise_max);
CASE('S', sample_read);
CASE('D', pinned);
CASE('W', weak);
CASE('e', exclusive);
CASE('b', bpf);
CASE('R', retire_lat);
default:
return PE_ERROR;
}
#undef CASE
}
yylval->mod = mod;
return PE_MODIFIER_EVENT;
}
#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
group [^,{}/]*[{][^}]*[}][^,{}/]*
event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
event [^,{}/]+
num_dec [0-9]+
num_hex 0x[a-fA-F0-9]{1,16}
num_raw_hex [a-fA-F0-9]{1,16}
name [a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
name_tag [\'][a-zA-Z0-9_*?\[\]][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().
* Also, the letters in modifier_event must not be in modifier_bp.
*/
modifier_event [ukhpPGHSDIWebR]{1,16}
modifier_bp [rwx]{1,3}
lc_type (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)
lc_op_result (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss)
digit [0-9]
non_digit [^0-9]
%%
%{
struct parse_events_state *_parse_state = parse_events_get_extra(yyscanner);
{
int start_token = _parse_state->stoken;
if (start_token == PE_START_TERMS)
BEGIN(config);
else if (start_token == PE_START_EVENTS)
BEGIN(event);
if (start_token) {
_parse_state->stoken = 0;
/*
* 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} |
{event} {
BEGIN(INITIAL);
REWIND(1);
return PE_EVENT_NAME;
}
<<EOF>> {
BEGIN(INITIAL);
REWIND(0);
}
, {
return ',';
}
}
<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); }
config3 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG3); }
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); }
nr { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_EVENTS); }
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); }
percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
aux-output { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT); }
aux-sample-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE); }
metric-id { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_METRIC_ID); }
cpu-cycles|cycles { return hw_term(yyscanner, PERF_COUNT_HW_CPU_CYCLES); }
stalled-cycles-frontend|idle-cycles-frontend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
stalled-cycles-backend|idle-cycles-backend { return hw_term(yyscanner, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
instructions { return hw_term(yyscanner, PERF_COUNT_HW_INSTRUCTIONS); }
cache-references { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_REFERENCES); }
cache-misses { return hw_term(yyscanner, PERF_COUNT_HW_CACHE_MISSES); }
branch-instructions|branches { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
branch-misses { return hw_term(yyscanner, PERF_COUNT_HW_BRANCH_MISSES); }
bus-cycles { return hw_term(yyscanner, PERF_COUNT_HW_BUS_CYCLES); }
ref-cycles { return hw_term(yyscanner, PERF_COUNT_HW_REF_CPU_CYCLES); }
r{num_raw_hex} { return str(yyscanner, PE_RAW); }
r0x{num_raw_hex} { return str(yyscanner, PE_RAW); }
, { return ','; }
"/" { BEGIN(INITIAL); return '/'; }
{lc_type} { return lc_str(yyscanner, _parse_state); }
{lc_type}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }
{lc_type}-{lc_op_result}-{lc_op_result} { return lc_str(yyscanner, _parse_state); }
{name_minus} { return str(yyscanner, PE_NAME); }
@{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
}
<mem>{
{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
/*
* The colon before memory access modifiers can get mixed up with the
* colon before event modifiers. Fortunately none of the option letters
* are the same, so trailing context can be used disambiguate the two
* cases.
*/
":"/{modifier_bp} { return PE_BP_COLON; }
/*
* The slash before memory length can get mixed up with the slash before
* config terms. Fortunately config terms do not start with a numeric
* digit, so trailing context can be used disambiguate the two cases.
*/
"/"/{digit} { return PE_BP_SLASH; }
"/"/{non_digit} { BEGIN(config); return '/'; }
{num_dec} { return value(_parse_state, yyscanner, 10); }
{num_hex} { return value(_parse_state, 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 tool(yyscanner, PERF_TOOL_DURATION_TIME); }
user_time { return tool(yyscanner, PERF_TOOL_USER_TIME); }
system_time { return tool(yyscanner, PERF_TOOL_SYSTEM_TIME); }
bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
cgroup-switches { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CGROUP_SWITCHES); }
{lc_type} { return str(yyscanner, PE_LEGACY_CACHE); }
{lc_type}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }
{lc_type}-{lc_op_result}-{lc_op_result} { return str(yyscanner, PE_LEGACY_CACHE); }
mem: { BEGIN(mem); return PE_PREFIX_MEM; }
r{num_raw_hex} { return str(yyscanner, PE_RAW); }
{num_dec} { return value(_parse_state, yyscanner, 10); }
{num_hex} { return value(_parse_state, yyscanner, 16); }
{modifier_event} { return modifiers(_parse_state, yyscanner); }
{name} { return str(yyscanner, PE_NAME); }
{name_tag} { return str(yyscanner, PE_NAME); }
"/" { BEGIN(config); return '/'; }
, { BEGIN(event); return ','; }
: { return ':'; }
"{" { BEGIN(event); return '{'; }
"}" { return '}'; }
= { return '='; }
\n { }
. { }
%%
int parse_events_wrap(void *scanner __maybe_unused)
{
return 1;
}
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