%define api.pure full
%parse-param {void *_parse_state}
%parse-param {void *scanner}
%lex-param {void* scanner}
%locations
%{
#ifndef NDEBUG
#define YYDEBUG 1
#endif
#include <errno.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include "pmu.h"
#include "pmus.h"
#include "evsel.h"
#include "parse-events.h"
#include "parse-events-bison.h"
int parse_events_lex(YYSTYPE * yylval_param, YYLTYPE * yylloc_param , void *yyscanner);
void parse_events_error(YYLTYPE *loc, void *parse_state, void *scanner, char const *msg);
#define PE_ABORT(val) \
do { \
if (val == -ENOMEM) \
YYNOMEM; \
YYABORT; \
} while (0)
static struct list_head* alloc_list(void)
{
struct list_head *list;
list = malloc(sizeof(*list));
if (!list)
return NULL;
INIT_LIST_HEAD(list);
return list;
}
static void free_list_evsel(struct list_head* list_evsel)
{
struct evsel *evsel, *tmp;
list_for_each_entry_safe(evsel, tmp, list_evsel, core.node) {
list_del_init(&evsel->core.node);
evsel__delete(evsel);
}
free(list_evsel);
}
%}
%token PE_START_EVENTS PE_START_TERMS
%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_TERM
%token PE_VALUE_SYM_TOOL
%token PE_EVENT_NAME
%token PE_RAW PE_NAME
%token PE_MODIFIER_EVENT PE_MODIFIER_BP PE_BP_COLON PE_BP_SLASH
%token PE_LEGACY_CACHE
%token PE_PREFIX_MEM
%token PE_ERROR
%token PE_DRV_CFG_TERM
%token PE_TERM_HW
%type <num> PE_VALUE
%type <num> PE_VALUE_SYM_HW
%type <num> PE_VALUE_SYM_SW
%type <num> PE_VALUE_SYM_TOOL
%type <mod> PE_MODIFIER_EVENT
%type <term_type> PE_TERM
%type <num> value_sym
%type <str> PE_RAW
%type <str> PE_NAME
%type <str> PE_LEGACY_CACHE
%type <str> PE_MODIFIER_BP
%type <str> PE_EVENT_NAME
%type <str> PE_DRV_CFG_TERM
%type <str> name_or_raw
%destructor { free ($$); } <str>
%type <term> event_term
%destructor { parse_events_term__delete ($$); } <term>
%type <list_terms> event_config
%type <list_terms> opt_event_config
%type <list_terms> opt_pmu_config
%destructor { parse_events_terms__delete ($$); } <list_terms>
%type <list_evsel> event_pmu
%type <list_evsel> event_legacy_symbol
%type <list_evsel> event_legacy_cache
%type <list_evsel> event_legacy_mem
%type <list_evsel> event_legacy_tracepoint
%type <list_evsel> event_legacy_numeric
%type <list_evsel> event_legacy_raw
%type <list_evsel> event_def
%type <list_evsel> event_mod
%type <list_evsel> event_name
%type <list_evsel> event
%type <list_evsel> events
%type <list_evsel> group_def
%type <list_evsel> group
%type <list_evsel> groups
%destructor { free_list_evsel ($$); } <list_evsel>
%type <tracepoint_name> tracepoint_name
%destructor { free ($$.sys); free ($$.event); } <tracepoint_name>
%type <hardware_term> PE_TERM_HW
%destructor { free ($$.str); } <hardware_term>
%union
{
char *str;
u64 num;
struct parse_events_modifier mod;
enum parse_events__term_type term_type;
struct list_head *list_evsel;
struct parse_events_terms *list_terms;
struct parse_events_term *term;
struct tracepoint_name {
char *sys;
char *event;
} tracepoint_name;
struct hardware_term {
char *str;
u64 num;
} hardware_term;
}
%%
/*
* Entry points. We are either parsing events or terminals. Just terminal
* parsing is used for parsing events in sysfs.
*/
start:
PE_START_EVENTS start_events
|
PE_START_TERMS start_terms
start_events: groups
{
/* Take the parsed events, groups.. and place into parse_state. */
struct list_head *groups = $1;
struct parse_events_state *parse_state = _parse_state;
list_splice_tail(groups, &parse_state->list);
free(groups);
}
groups: /* A list of groups or events. */
groups ',' group
{
/* Merge group into the list of events/groups. */
struct list_head *groups = $1;
struct list_head *group = $3;
list_splice_tail(group, groups);
free(group);
$$ = groups;
}
|
groups ',' event
{
/* Merge event into the list of events/groups. */
struct list_head *groups = $1;
struct list_head *event = $3;
list_splice_tail(event, groups);
free(event);
$$ = groups;
}
|
group
|
event
group:
group_def ':' PE_MODIFIER_EVENT
{
/* Apply the modifier to the events in the group_def. */
struct list_head *list = $1;
int err;
err = parse_events__modifier_group(_parse_state, &@3, list, $3);
if (err)
YYABORT;
$$ = list;
}
|
group_def
group_def:
PE_NAME '{' events '}'
{
struct list_head *list = $3;
/*
* Set the first entry of list to be the leader. Set the group name on
* the leader to $1 taking ownership.
*/
parse_events__set_leader($1, list);
$$ = list;
}
|
'{' events '}'
{
struct list_head *list = $2;
/* Set the first entry of list to be the leader clearing the group name. */
parse_events__set_leader(NULL, list);
$$ = list;
}
events:
events ',' event
{
struct list_head *events = $1;
struct list_head *event = $3;
list_splice_tail(event, events);
free(event);
$$ = events;
}
|
event
event: event_mod
event_mod:
event_name PE_MODIFIER_EVENT
{
struct list_head *list = $1;
int err;
/*
* Apply modifier on all events added by single event definition
* (there could be more events added for multiple tracepoint
* definitions via '*?'.
*/
err = parse_events__modifier_event(_parse_state, &@2, list, $2);
if (err)
YYABORT;
$$ = list;
}
|
event_name
event_name:
PE_EVENT_NAME event_def
{
/*
* When an event is parsed the text is rewound and the entire text of
* the event is set to the str of PE_EVENT_NAME token matched here. If
* no name was on an event via a term, set the name to the entire text
* taking ownership of the allocation.
*/
int err = parse_events__set_default_name($2, $1);
if (err) {
free_list_evsel($2);
YYNOMEM;
}
$$ = $2;
}
|
event_def
event_def: event_pmu |
event_legacy_symbol |
event_legacy_cache sep_dc |
event_legacy_mem sep_dc |
event_legacy_tracepoint sep_dc |
event_legacy_numeric sep_dc |
event_legacy_raw sep_dc
event_pmu:
PE_NAME opt_pmu_config
{
/* List of created evsels. */
struct list_head *list = NULL;
int err = parse_events_multi_pmu_add_or_add_pmu(_parse_state, $1, $2, &list, &@1);
parse_events_terms__delete($2);
free($1);
if (err)
PE_ABORT(err);
$$ = list;
}
|
PE_NAME sep_dc
{
struct list_head *list;
int err;
err = parse_events_multi_pmu_add(_parse_state, $1, NULL, &list, &@1);
if (err < 0) {
struct parse_events_state *parse_state = _parse_state;
struct parse_events_error *error = parse_state->error;
char *help;
if (asprintf(&help, "Unable to find event on a PMU of '%s'", $1) < 0)
help = NULL;
parse_events_error__handle(error, @1.first_column, strdup("Bad event name"), help);
free($1);
PE_ABORT(err);
}
free($1);
$$ = list;
}
value_sym:
PE_VALUE_SYM_HW
|
PE_VALUE_SYM_SW
event_legacy_symbol:
value_sym '/' event_config '/'
{
struct list_head *list;
int type = $1 >> 16;
int config = $1 & 255;
int err;
bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_numeric(_parse_state, list, type, config, $3, wildcard);
parse_events_terms__delete($3);
if (err) {
free_list_evsel(list);
PE_ABORT(err);
}
$$ = list;
}
|
value_sym sep_slash_slash_dc
{
struct list_head *list;
int type = $1 >> 16;
int config = $1 & 255;
bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_numeric(_parse_state, list, type, config, /*head_config=*/NULL, wildcard);
if (err)
PE_ABORT(err);
$$ = list;
}
|
PE_VALUE_SYM_TOOL sep_slash_slash_dc
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_tool(_parse_state, list, $1);
if (err)
YYNOMEM;
$$ = list;
}
event_legacy_cache:
PE_LEGACY_CACHE opt_event_config
{
struct parse_events_state *parse_state = _parse_state;
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_cache(list, &parse_state->idx, $1, parse_state, $2);
parse_events_terms__delete($2);
free($1);
if (err) {
free_list_evsel(list);
PE_ABORT(err);
}
$$ = list;
}
event_legacy_mem:
PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_breakpoint(_parse_state, list,
$2, $6, $4, $7);
parse_events_terms__delete($7);
free($6);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
|
PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE opt_event_config
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_breakpoint(_parse_state, list,
$2, NULL, $4, $5);
parse_events_terms__delete($5);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
|
PE_PREFIX_MEM PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_breakpoint(_parse_state, list,
$2, $4, 0, $5);
parse_events_terms__delete($5);
free($4);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
|
PE_PREFIX_MEM PE_VALUE opt_event_config
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_breakpoint(_parse_state, list,
$2, NULL, 0, $3);
parse_events_terms__delete($3);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
event_legacy_tracepoint:
tracepoint_name opt_event_config
{
struct parse_events_state *parse_state = _parse_state;
struct parse_events_error *error = parse_state->error;
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_tracepoint(parse_state, list, $1.sys, $1.event,
error, $2, &@1);
parse_events_terms__delete($2);
free($1.sys);
free($1.event);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
tracepoint_name:
PE_NAME ':' PE_NAME
{
struct tracepoint_name tracepoint = {$1, $3};
$$ = tracepoint;
}
event_legacy_numeric:
PE_VALUE ':' PE_VALUE opt_event_config
{
struct list_head *list;
int err;
list = alloc_list();
if (!list)
YYNOMEM;
err = parse_events_add_numeric(_parse_state, list, (u32)$1, $3, $4,
/*wildcard=*/false);
parse_events_terms__delete($4);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
event_legacy_raw:
PE_RAW opt_event_config
{
struct list_head *list;
int err;
u64 num;
list = alloc_list();
if (!list)
YYNOMEM;
errno = 0;
num = strtoull($1 + 1, NULL, 16);
/* Given the lexer will only give [a-fA-F0-9]+ a failure here should be impossible. */
if (errno)
YYABORT;
free($1);
err = parse_events_add_numeric(_parse_state, list, PERF_TYPE_RAW, num, $2,
/*wildcard=*/false);
parse_events_terms__delete($2);
if (err) {
free(list);
PE_ABORT(err);
}
$$ = list;
}
opt_event_config:
'/' event_config '/'
{
$$ = $2;
}
|
'/' '/'
{
$$ = NULL;
}
|
{
$$ = NULL;
}
opt_pmu_config:
'/' event_config '/'
{
$$ = $2;
}
|
'/' '/'
{
$$ = NULL;
}
start_terms: event_config
{
struct parse_events_state *parse_state = _parse_state;
if (parse_state->terms) {
parse_events_terms__delete ($1);
YYABORT;
}
parse_state->terms = $1;
}
event_config:
event_config ',' event_term
{
struct parse_events_terms *head = $1;
struct parse_events_term *term = $3;
if (!head) {
parse_events_term__delete(term);
YYABORT;
}
list_add_tail(&term->list, &head->terms);
$$ = $1;
}
|
event_term
{
struct parse_events_terms *head = malloc(sizeof(*head));
struct parse_events_term *term = $1;
if (!head)
YYNOMEM;
parse_events_terms__init(head);
list_add_tail(&term->list, &head->terms);
$$ = head;
}
name_or_raw: PE_RAW | PE_NAME | PE_LEGACY_CACHE
|
PE_TERM_HW
{
$$ = $1.str;
}
event_term:
PE_RAW
{
struct parse_events_term *term;
int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_RAW,
strdup("raw"), $1, &@1, &@1);
if (err) {
free($1);
PE_ABORT(err);
}
$$ = term;
}
|
name_or_raw '=' name_or_raw
{
struct parse_events_term *term;
int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER, $1, $3, &@1, &@3);
if (err) {
free($1);
free($3);
PE_ABORT(err);
}
$$ = term;
}
|
name_or_raw '=' PE_VALUE
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
$1, $3, /*novalue=*/false, &@1, &@3);
if (err) {
free($1);
PE_ABORT(err);
}
$$ = term;
}
|
PE_LEGACY_CACHE
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE,
$1, /*num=*/1, /*novalue=*/true, &@1, /*loc_val=*/NULL);
if (err) {
free($1);
PE_ABORT(err);
}
$$ = term;
}
|
PE_NAME
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
$1, /*num=*/1, /*novalue=*/true, &@1, /*loc_val=*/NULL);
if (err) {
free($1);
PE_ABORT(err);
}
$$ = term;
}
|
PE_TERM_HW
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_HARDWARE,
$1.str, $1.num & 255, /*novalue=*/false,
&@1, /*loc_val=*/NULL);
if (err) {
free($1.str);
PE_ABORT(err);
}
$$ = term;
}
|
PE_TERM '=' name_or_raw
{
struct parse_events_term *term;
int err = parse_events_term__str(&term, $1, /*config=*/NULL, $3, &@1, &@3);
if (err) {
free($3);
PE_ABORT(err);
}
$$ = term;
}
|
PE_TERM '=' PE_TERM
{
struct parse_events_term *term;
int err = parse_events_term__term(&term, $1, $3, &@1, &@3);
if (err)
PE_ABORT(err);
$$ = term;
}
|
PE_TERM '=' PE_VALUE
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, $1,
/*config=*/NULL, $3, /*novalue=*/false,
&@1, &@3);
if (err)
PE_ABORT(err);
$$ = term;
}
|
PE_TERM
{
struct parse_events_term *term;
int err = parse_events_term__num(&term, $1,
/*config=*/NULL, /*num=*/1, /*novalue=*/true,
&@1, /*loc_val=*/NULL);
if (err)
PE_ABORT(err);
$$ = term;
}
|
PE_DRV_CFG_TERM
{
struct parse_events_term *term;
char *config = strdup($1);
int err;
if (!config)
YYNOMEM;
err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG, config, $1, &@1, NULL);
if (err) {
free($1);
free(config);
PE_ABORT(err);
}
$$ = term;
}
sep_dc: ':' |
sep_slash_slash_dc: '/' '/' | ':' |
%%
void parse_events_error(YYLTYPE *loc, void *_parse_state,
void *scanner __maybe_unused,
char const *msg __maybe_unused)
{
struct parse_events_state *parse_state = _parse_state;
if (!parse_state->error || !list_empty(&parse_state->error->list))
return;
parse_events_error__handle(parse_state->error, loc->last_column,
strdup("Unrecognized input"), NULL);
}
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