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![Ian Rogers](/assets/img/avatar_default.png)
There's no need to read the string ':' or '/' for PE_BP_COLON or
PE_BP_SLASH and doing so causes parse-events.y to leak memory.
The original patch has a committer note about not using these tokens
presumably as yacc spotted they were a memory leak because no
%destructor could be run. Remove the unused token workaround as there
is now no value associated with these tokens.
Fixes: f0617f526c
("perf parse: Allow config terms with breakpoints")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230613182629.1500317-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
250 lines
8 KiB
C
250 lines
8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_PARSE_EVENTS_H
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#define __PERF_PARSE_EVENTS_H
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/*
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* Parse symbolic events/counts passed in as options:
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*/
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#include <linux/list.h>
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#include <stdbool.h>
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#include <linux/types.h>
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#include <linux/perf_event.h>
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#include <string.h>
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struct evsel;
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struct evlist;
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struct parse_events_error;
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struct option;
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struct perf_pmu;
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const char *event_type(int type);
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/* Arguments encoded in opt->value. */
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struct parse_events_option_args {
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struct evlist **evlistp;
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const char *pmu_filter;
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};
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int parse_events_option(const struct option *opt, const char *str, int unset);
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int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset);
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__attribute__((nonnull(1, 2, 4)))
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int __parse_events(struct evlist *evlist, const char *str, const char *pmu_filter,
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struct parse_events_error *error, struct perf_pmu *fake_pmu,
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bool warn_if_reordered);
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__attribute__((nonnull(1, 2, 3)))
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static inline int parse_events(struct evlist *evlist, const char *str,
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struct parse_events_error *err)
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{
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return __parse_events(evlist, str, /*pmu_filter=*/NULL, err, /*fake_pmu=*/NULL,
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/*warn_if_reordered=*/true);
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}
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int parse_event(struct evlist *evlist, const char *str);
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int parse_events_terms(struct list_head *terms, const char *str);
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int parse_filter(const struct option *opt, const char *str, int unset);
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int exclude_perf(const struct option *opt, const char *arg, int unset);
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enum {
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PARSE_EVENTS__TERM_TYPE_NUM,
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PARSE_EVENTS__TERM_TYPE_STR,
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};
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enum {
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PARSE_EVENTS__TERM_TYPE_USER,
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PARSE_EVENTS__TERM_TYPE_CONFIG,
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PARSE_EVENTS__TERM_TYPE_CONFIG1,
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PARSE_EVENTS__TERM_TYPE_CONFIG2,
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PARSE_EVENTS__TERM_TYPE_CONFIG3,
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PARSE_EVENTS__TERM_TYPE_NAME,
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PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD,
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PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ,
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PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,
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PARSE_EVENTS__TERM_TYPE_TIME,
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PARSE_EVENTS__TERM_TYPE_CALLGRAPH,
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PARSE_EVENTS__TERM_TYPE_STACKSIZE,
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PARSE_EVENTS__TERM_TYPE_NOINHERIT,
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PARSE_EVENTS__TERM_TYPE_INHERIT,
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PARSE_EVENTS__TERM_TYPE_MAX_STACK,
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PARSE_EVENTS__TERM_TYPE_MAX_EVENTS,
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PARSE_EVENTS__TERM_TYPE_NOOVERWRITE,
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PARSE_EVENTS__TERM_TYPE_OVERWRITE,
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PARSE_EVENTS__TERM_TYPE_DRV_CFG,
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PARSE_EVENTS__TERM_TYPE_PERCORE,
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PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT,
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PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE,
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PARSE_EVENTS__TERM_TYPE_METRIC_ID,
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PARSE_EVENTS__TERM_TYPE_RAW,
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PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE,
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PARSE_EVENTS__TERM_TYPE_HARDWARE,
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__PARSE_EVENTS__TERM_TYPE_NR,
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};
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struct parse_events_array {
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size_t nr_ranges;
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struct {
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unsigned int start;
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size_t length;
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} *ranges;
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};
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struct parse_events_term {
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char *config;
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struct parse_events_array array;
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union {
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char *str;
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u64 num;
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} val;
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int type_val;
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int type_term;
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struct list_head list;
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bool used;
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bool no_value;
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/* error string indexes for within parsed string */
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int err_term;
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int err_val;
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/* Coming from implicit alias */
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bool weak;
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};
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struct parse_events_error {
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int num_errors; /* number of errors encountered */
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int idx; /* index in the parsed string */
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char *str; /* string to display at the index */
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char *help; /* optional help string */
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int first_idx;/* as above, but for the first encountered error */
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char *first_str;
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char *first_help;
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};
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struct parse_events_state {
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struct list_head list;
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int idx;
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struct parse_events_error *error;
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struct evlist *evlist;
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struct list_head *terms;
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int stoken;
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struct perf_pmu *fake_pmu;
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/* If non-null, when wildcard matching only match the given PMU. */
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const char *pmu_filter;
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/* Should PE_LEGACY_NAME tokens be generated for config terms? */
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bool match_legacy_cache_terms;
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bool wild_card_pmus;
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};
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bool parse_events__filter_pmu(const struct parse_events_state *parse_state,
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const struct perf_pmu *pmu);
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void parse_events__shrink_config_terms(void);
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int parse_events__is_hardcoded_term(struct parse_events_term *term);
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int parse_events_term__num(struct parse_events_term **term,
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int type_term, char *config, u64 num,
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bool novalue,
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void *loc_term, void *loc_val);
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int parse_events_term__str(struct parse_events_term **term,
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int type_term, char *config, char *str,
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void *loc_term, void *loc_val);
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int parse_events_term__term(struct parse_events_term **term,
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int term_lhs, int term_rhs,
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void *loc_term, void *loc_val);
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int parse_events_term__clone(struct parse_events_term **new,
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struct parse_events_term *term);
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void parse_events_term__delete(struct parse_events_term *term);
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void parse_events_terms__delete(struct list_head *terms);
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void parse_events_terms__purge(struct list_head *terms);
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void parse_events__clear_array(struct parse_events_array *a);
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int parse_events__modifier_event(struct list_head *list, char *str, bool add);
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int parse_events__modifier_group(struct list_head *list, char *event_mod);
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int parse_events_name(struct list_head *list, const char *name);
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int parse_events_add_tracepoint(struct list_head *list, int *idx,
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const char *sys, const char *event,
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struct parse_events_error *error,
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struct list_head *head_config);
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int parse_events_load_bpf(struct parse_events_state *parse_state,
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struct list_head *list,
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char *bpf_file_name,
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bool source,
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struct list_head *head_config);
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/* Provide this function for perf test */
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struct bpf_object;
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int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
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struct list_head *list,
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struct bpf_object *obj,
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struct list_head *head_config);
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int parse_events_add_numeric(struct parse_events_state *parse_state,
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struct list_head *list,
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u32 type, u64 config,
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struct list_head *head_config,
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bool wildcard);
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int parse_events_add_tool(struct parse_events_state *parse_state,
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struct list_head *list,
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int tool_event);
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int parse_events_add_cache(struct list_head *list, int *idx, const char *name,
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struct parse_events_state *parse_state,
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struct list_head *head_config);
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int parse_events__decode_legacy_cache(const char *name, int pmu_type, __u64 *config);
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int parse_events_add_breakpoint(struct parse_events_state *parse_state,
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struct list_head *list,
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u64 addr, char *type, u64 len,
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struct list_head *head_config);
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int parse_events_add_pmu(struct parse_events_state *parse_state,
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struct list_head *list, char *name,
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struct list_head *head_config,
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bool auto_merge_stats);
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struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
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const char *name, const char *metric_id,
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struct perf_pmu *pmu);
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int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
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char *str,
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struct list_head *head_config,
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struct list_head **listp);
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int parse_events_copy_term_list(struct list_head *old,
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struct list_head **new);
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void parse_events__set_leader(char *name, struct list_head *list);
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void parse_events_update_lists(struct list_head *list_event,
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struct list_head *list_all);
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void parse_events_evlist_error(struct parse_events_state *parse_state,
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int idx, const char *str);
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struct event_symbol {
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const char *symbol;
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const char *alias;
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};
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extern struct event_symbol event_symbols_hw[];
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extern struct event_symbol event_symbols_sw[];
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char *parse_events_formats_error_string(char *additional_terms);
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void parse_events_error__init(struct parse_events_error *err);
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void parse_events_error__exit(struct parse_events_error *err);
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void parse_events_error__handle(struct parse_events_error *err, int idx,
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char *str, char *help);
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void parse_events_error__print(struct parse_events_error *err,
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const char *event);
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#ifdef HAVE_LIBELF_SUPPORT
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/*
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* If the probe point starts with '%',
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* or starts with "sdt_" and has a ':' but no '=',
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* then it should be a SDT/cached probe point.
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*/
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static inline bool is_sdt_event(char *str)
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{
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return (str[0] == '%' ||
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(!strncmp(str, "sdt_", 4) &&
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!!strchr(str, ':') && !strchr(str, '=')));
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}
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#else
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static inline bool is_sdt_event(char *str __maybe_unused)
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{
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return false;
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}
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#endif /* HAVE_LIBELF_SUPPORT */
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#endif /* __PERF_PARSE_EVENTS_H */
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