4f1b067359
This reverts commit 617824a7f0
.
This made a simple 'perf record -e cycles:pp make -j199' stop working on
the Ampere ARM64 system Linus uses to test ARM64 kernels, as discussed
at length in the threads in the Link tags below.
The fix provided by Ian wasn't acceptable and work to fix this will take
time we don't have at this point, so lets revert this and work on it on
the next devel cycle.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Cc: Ethan Adams <j.ethan.adams@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tycho Andersen <tycho@tycho.pizza>
Cc: Yang Jihong <yangjihong@bytedance.com>
Link: https://lore.kernel.org/lkml/CAHk-=wi5Ri=yR2jBVk-4HzTzpoAWOgstr1LEvg_-OXtJvXXJOA@mail.gmail.com
Link: https://lore.kernel.org/lkml/CAHk-=wiWvtFyedDNpoV7a8Fq_FpbB+F5KmWK2xPY3QoYseOf_A@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
779 lines
14 KiB
Plaintext
779 lines
14 KiB
Plaintext
%define api.pure full
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%parse-param {void *_parse_state}
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%parse-param {void *scanner}
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%lex-param {void* scanner}
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%locations
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%{
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#ifndef NDEBUG
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#define YYDEBUG 1
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#endif
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#include <errno.h>
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include "pmu.h"
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#include "pmus.h"
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#include "evsel.h"
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#include "parse-events.h"
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#include "parse-events-bison.h"
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int parse_events_lex(YYSTYPE * yylval_param, YYLTYPE * yylloc_param , void *yyscanner);
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void parse_events_error(YYLTYPE *loc, void *parse_state, void *scanner, char const *msg);
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#define PE_ABORT(val) \
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do { \
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if (val == -ENOMEM) \
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YYNOMEM; \
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YYABORT; \
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} while (0)
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static struct list_head* alloc_list(void)
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{
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struct list_head *list;
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list = malloc(sizeof(*list));
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if (!list)
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return NULL;
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INIT_LIST_HEAD(list);
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return list;
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}
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static void free_list_evsel(struct list_head* list_evsel)
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{
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struct evsel *evsel, *tmp;
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list_for_each_entry_safe(evsel, tmp, list_evsel, core.node) {
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list_del_init(&evsel->core.node);
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evsel__delete(evsel);
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}
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free(list_evsel);
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}
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%}
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%token PE_START_EVENTS PE_START_TERMS
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%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_TERM
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%token PE_VALUE_SYM_TOOL
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%token PE_EVENT_NAME
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%token PE_RAW PE_NAME
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%token PE_MODIFIER_EVENT PE_MODIFIER_BP PE_BP_COLON PE_BP_SLASH
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%token PE_LEGACY_CACHE
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%token PE_PREFIX_MEM
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%token PE_ERROR
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%token PE_DRV_CFG_TERM
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%token PE_TERM_HW
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%type <num> PE_VALUE
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%type <num> PE_VALUE_SYM_HW
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%type <num> PE_VALUE_SYM_SW
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%type <num> PE_VALUE_SYM_TOOL
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%type <mod> PE_MODIFIER_EVENT
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%type <term_type> PE_TERM
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%type <num> value_sym
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%type <str> PE_RAW
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%type <str> PE_NAME
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%type <str> PE_LEGACY_CACHE
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%type <str> PE_MODIFIER_BP
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%type <str> PE_EVENT_NAME
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%type <str> PE_DRV_CFG_TERM
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%type <str> name_or_raw
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%destructor { free ($$); } <str>
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%type <term> event_term
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%destructor { parse_events_term__delete ($$); } <term>
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%type <list_terms> event_config
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%type <list_terms> opt_event_config
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%type <list_terms> opt_pmu_config
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%destructor { parse_events_terms__delete ($$); } <list_terms>
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%type <list_evsel> event_pmu
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%type <list_evsel> event_legacy_symbol
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%type <list_evsel> event_legacy_cache
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%type <list_evsel> event_legacy_mem
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%type <list_evsel> event_legacy_tracepoint
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%type <list_evsel> event_legacy_numeric
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%type <list_evsel> event_legacy_raw
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%type <list_evsel> event_def
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%type <list_evsel> event_mod
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%type <list_evsel> event_name
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%type <list_evsel> event
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%type <list_evsel> events
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%type <list_evsel> group_def
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%type <list_evsel> group
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%type <list_evsel> groups
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%destructor { free_list_evsel ($$); } <list_evsel>
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%type <tracepoint_name> tracepoint_name
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%destructor { free ($$.sys); free ($$.event); } <tracepoint_name>
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%type <hardware_term> PE_TERM_HW
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%destructor { free ($$.str); } <hardware_term>
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%union
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{
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char *str;
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u64 num;
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struct parse_events_modifier mod;
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enum parse_events__term_type term_type;
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struct list_head *list_evsel;
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struct parse_events_terms *list_terms;
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struct parse_events_term *term;
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struct tracepoint_name {
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char *sys;
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char *event;
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} tracepoint_name;
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struct hardware_term {
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char *str;
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u64 num;
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} hardware_term;
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}
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%%
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/*
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* Entry points. We are either parsing events or terminals. Just terminal
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* parsing is used for parsing events in sysfs.
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*/
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start:
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PE_START_EVENTS start_events
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PE_START_TERMS start_terms
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start_events: groups
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{
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/* Take the parsed events, groups.. and place into parse_state. */
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struct list_head *groups = $1;
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struct parse_events_state *parse_state = _parse_state;
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list_splice_tail(groups, &parse_state->list);
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free(groups);
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}
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groups: /* A list of groups or events. */
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groups ',' group
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{
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/* Merge group into the list of events/groups. */
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struct list_head *groups = $1;
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struct list_head *group = $3;
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list_splice_tail(group, groups);
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free(group);
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$$ = groups;
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}
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groups ',' event
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{
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/* Merge event into the list of events/groups. */
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struct list_head *groups = $1;
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struct list_head *event = $3;
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list_splice_tail(event, groups);
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free(event);
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$$ = groups;
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}
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group
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event
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group:
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group_def ':' PE_MODIFIER_EVENT
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{
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/* Apply the modifier to the events in the group_def. */
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struct list_head *list = $1;
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int err;
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err = parse_events__modifier_group(_parse_state, &@3, list, $3);
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if (err)
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YYABORT;
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$$ = list;
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}
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group_def
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group_def:
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PE_NAME '{' events '}'
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{
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struct list_head *list = $3;
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/*
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* Set the first entry of list to be the leader. Set the group name on
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* the leader to $1 taking ownership.
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*/
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parse_events__set_leader($1, list);
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$$ = list;
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}
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'{' events '}'
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{
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struct list_head *list = $2;
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/* Set the first entry of list to be the leader clearing the group name. */
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parse_events__set_leader(NULL, list);
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$$ = list;
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}
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events:
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events ',' event
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{
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struct list_head *events = $1;
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struct list_head *event = $3;
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list_splice_tail(event, events);
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free(event);
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$$ = events;
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}
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event
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event: event_mod
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event_mod:
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event_name PE_MODIFIER_EVENT
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{
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struct list_head *list = $1;
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int err;
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/*
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* Apply modifier on all events added by single event definition
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* (there could be more events added for multiple tracepoint
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* definitions via '*?'.
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*/
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err = parse_events__modifier_event(_parse_state, &@2, list, $2);
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if (err)
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YYABORT;
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$$ = list;
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}
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event_name
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event_name:
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PE_EVENT_NAME event_def
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{
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/*
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* When an event is parsed the text is rewound and the entire text of
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* the event is set to the str of PE_EVENT_NAME token matched here. If
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* no name was on an event via a term, set the name to the entire text
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* taking ownership of the allocation.
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*/
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int err = parse_events__set_default_name($2, $1);
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if (err) {
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free_list_evsel($2);
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YYNOMEM;
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}
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$$ = $2;
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}
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event_def
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event_def: event_pmu |
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event_legacy_symbol |
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event_legacy_cache sep_dc |
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event_legacy_mem sep_dc |
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event_legacy_tracepoint sep_dc |
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event_legacy_numeric sep_dc |
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event_legacy_raw sep_dc
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event_pmu:
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PE_NAME opt_pmu_config
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{
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/* List of created evsels. */
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struct list_head *list = NULL;
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int err = parse_events_multi_pmu_add_or_add_pmu(_parse_state, $1, $2, &list, &@1);
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parse_events_terms__delete($2);
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free($1);
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if (err)
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PE_ABORT(err);
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$$ = list;
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}
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PE_NAME sep_dc
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{
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struct list_head *list;
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int err;
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err = parse_events_multi_pmu_add(_parse_state, $1, NULL, &list, &@1);
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if (err < 0) {
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struct parse_events_state *parse_state = _parse_state;
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struct parse_events_error *error = parse_state->error;
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char *help;
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if (asprintf(&help, "Unable to find event on a PMU of '%s'", $1) < 0)
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help = NULL;
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parse_events_error__handle(error, @1.first_column, strdup("Bad event name"), help);
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free($1);
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PE_ABORT(err);
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}
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free($1);
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$$ = list;
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}
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value_sym:
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PE_VALUE_SYM_HW
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PE_VALUE_SYM_SW
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event_legacy_symbol:
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value_sym '/' event_config '/'
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{
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struct list_head *list;
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int type = $1 >> 16;
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int config = $1 & 255;
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int err;
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bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_numeric(_parse_state, list, type, config, $3, wildcard);
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parse_events_terms__delete($3);
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if (err) {
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free_list_evsel(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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value_sym sep_slash_slash_dc
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{
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struct list_head *list;
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int type = $1 >> 16;
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int config = $1 & 255;
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bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_numeric(_parse_state, list, type, config, /*head_config=*/NULL, wildcard);
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if (err)
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PE_ABORT(err);
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$$ = list;
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}
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PE_VALUE_SYM_TOOL sep_slash_slash_dc
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_tool(_parse_state, list, $1);
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if (err)
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YYNOMEM;
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$$ = list;
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}
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event_legacy_cache:
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PE_LEGACY_CACHE opt_event_config
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{
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struct parse_events_state *parse_state = _parse_state;
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_cache(list, &parse_state->idx, $1, parse_state, $2);
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parse_events_terms__delete($2);
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free($1);
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if (err) {
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free_list_evsel(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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event_legacy_mem:
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PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_breakpoint(_parse_state, list,
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$2, $6, $4, $7);
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parse_events_terms__delete($7);
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free($6);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE opt_event_config
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_breakpoint(_parse_state, list,
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$2, NULL, $4, $5);
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parse_events_terms__delete($5);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_breakpoint(_parse_state, list,
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$2, $4, 0, $5);
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parse_events_terms__delete($5);
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free($4);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE opt_event_config
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_breakpoint(_parse_state, list,
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$2, NULL, 0, $3);
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parse_events_terms__delete($3);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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event_legacy_tracepoint:
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tracepoint_name opt_event_config
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{
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struct parse_events_state *parse_state = _parse_state;
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struct parse_events_error *error = parse_state->error;
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_tracepoint(parse_state, list, $1.sys, $1.event,
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error, $2, &@1);
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parse_events_terms__delete($2);
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free($1.sys);
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free($1.event);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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tracepoint_name:
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PE_NAME ':' PE_NAME
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{
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struct tracepoint_name tracepoint = {$1, $3};
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$$ = tracepoint;
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}
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event_legacy_numeric:
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PE_VALUE ':' PE_VALUE opt_event_config
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{
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struct list_head *list;
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int err;
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list = alloc_list();
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if (!list)
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YYNOMEM;
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err = parse_events_add_numeric(_parse_state, list, (u32)$1, $3, $4,
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/*wildcard=*/false);
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parse_events_terms__delete($4);
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if (err) {
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free(list);
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PE_ABORT(err);
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}
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$$ = list;
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}
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event_legacy_raw:
|
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PE_RAW opt_event_config
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{
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struct list_head *list;
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int err;
|
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u64 num;
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list = alloc_list();
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|
if (!list)
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|
YYNOMEM;
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errno = 0;
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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);
|
|
}
|