b6645a7235
Make it easier to release memory associated with parse event terms by duplicating the string for the config name and ensuring the val string is a duplicate. Currently the parser may memory leak terms and this is addressed in a later patch. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: John Garry <john.garry@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: clang-built-linux@googlegroups.com Cc: netdev@vger.kernel.org Link: http://lore.kernel.org/lkml/20191030223448.12930-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
744 lines
14 KiB
Plaintext
744 lines
14 KiB
Plaintext
%pure-parser
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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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#define YYDEBUG 1
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#include <fnmatch.h>
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#include <stdio.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 "evsel.h"
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#include "parse-events.h"
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#include "parse-events-bison.h"
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void parse_events_error(YYLTYPE *loc, void *parse_state, void *scanner, char const *msg);
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#define ABORT_ON(val) \
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do { \
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if (val) \
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YYABORT; \
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} while (0)
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static struct list_head* alloc_list()
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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 inc_group_count(struct list_head *list,
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struct parse_events_state *parse_state)
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{
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/* Count groups only have more than 1 members */
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if (!list_is_last(list->next, list))
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parse_state->nr_groups++;
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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_RAW 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_NAME
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%token PE_BPF_OBJECT PE_BPF_SOURCE
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%token PE_MODIFIER_EVENT PE_MODIFIER_BP
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%token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
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%token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
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%token PE_ERROR
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%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
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%token PE_ARRAY_ALL PE_ARRAY_RANGE
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%token PE_DRV_CFG_TERM
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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 <num> PE_RAW
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%type <num> PE_TERM
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%type <str> PE_NAME
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%type <str> PE_BPF_OBJECT
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%type <str> PE_BPF_SOURCE
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%type <str> PE_NAME_CACHE_TYPE
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%type <str> PE_NAME_CACHE_OP_RESULT
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%type <str> PE_MODIFIER_EVENT
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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_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
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%type <str> PE_DRV_CFG_TERM
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%type <num> value_sym
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%type <head> event_config
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%type <head> opt_event_config
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%type <head> opt_pmu_config
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%type <term> event_term
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%type <head> event_pmu
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%type <head> event_legacy_symbol
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%type <head> event_legacy_cache
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%type <head> event_legacy_mem
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%type <head> event_legacy_tracepoint
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%type <tracepoint_name> tracepoint_name
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%type <head> event_legacy_numeric
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%type <head> event_legacy_raw
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%type <head> event_bpf_file
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%type <head> event_def
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%type <head> event_mod
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%type <head> event_name
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%type <head> event
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%type <head> events
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%type <head> group_def
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%type <head> group
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%type <head> groups
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%type <array> array
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%type <array> array_term
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%type <array> array_terms
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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 list_head *head;
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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 parse_events_array array;
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}
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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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struct parse_events_state *parse_state = _parse_state;
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parse_events_update_lists($1, &parse_state->list);
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}
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groups:
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groups ',' group
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{
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struct list_head *list = $1;
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struct list_head *group = $3;
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parse_events_update_lists(group, list);
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$$ = list;
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}
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groups ',' event
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{
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struct list_head *list = $1;
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struct list_head *event = $3;
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parse_events_update_lists(event, list);
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$$ = list;
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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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struct list_head *list = $1;
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ABORT_ON(parse_events__modifier_group(list, $3));
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$$ = list;
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}
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group_def
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group_def:
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PE_NAME '{' events '}'
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{
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struct list_head *list = $3;
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inc_group_count(list, _parse_state);
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parse_events__set_leader($1, list, _parse_state);
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$$ = 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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inc_group_count(list, _parse_state);
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parse_events__set_leader(NULL, list, _parse_state);
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$$ = list;
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}
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events:
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events ',' event
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{
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struct list_head *event = $3;
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struct list_head *list = $1;
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parse_events_update_lists(event, list);
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$$ = list;
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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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/*
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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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ABORT_ON(parse_events__modifier_event(list, $2, false));
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$$ = list;
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}
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event_name
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event_name:
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PE_EVENT_NAME event_def
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{
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ABORT_ON(parse_events_name($2, $1));
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free($1);
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$$ = $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 |
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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_bpf_file
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event_pmu:
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PE_NAME opt_pmu_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, *orig_terms, *terms;
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if (parse_events_copy_term_list($2, &orig_terms))
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YYABORT;
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if (error)
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error->idx = @1.first_column;
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list = alloc_list();
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ABORT_ON(!list);
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if (parse_events_add_pmu(_parse_state, list, $1, $2, false, false)) {
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struct perf_pmu *pmu = NULL;
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int ok = 0;
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char *pattern;
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if (asprintf(&pattern, "%s*", $1) < 0)
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YYABORT;
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while ((pmu = perf_pmu__scan(pmu)) != NULL) {
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char *name = pmu->name;
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if (!strncmp(name, "uncore_", 7) &&
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strncmp($1, "uncore_", 7))
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name += 7;
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if (!fnmatch(pattern, name, 0)) {
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if (parse_events_copy_term_list(orig_terms, &terms)) {
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free(pattern);
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YYABORT;
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}
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if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms, true, false))
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ok++;
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parse_events_terms__delete(terms);
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}
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}
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free(pattern);
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if (!ok)
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YYABORT;
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}
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parse_events_terms__delete($2);
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parse_events_terms__delete(orig_terms);
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$$ = list;
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}
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PE_KERNEL_PMU_EVENT sep_dc
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{
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struct list_head *list;
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if (parse_events_multi_pmu_add(_parse_state, $1, &list) < 0)
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YYABORT;
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$$ = list;
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}
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PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
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{
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struct list_head *list;
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char pmu_name[128];
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snprintf(&pmu_name, 128, "%s-%s", $1, $3);
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if (parse_events_multi_pmu_add(_parse_state, pmu_name, &list) < 0)
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YYABORT;
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$$ = list;
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}
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value_sym:
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PE_VALUE_SYM_HW
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PE_VALUE_SYM_SW
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event_legacy_symbol:
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value_sym '/' event_config '/'
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{
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struct list_head *list;
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int type = $1 >> 16;
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int config = $1 & 255;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_numeric(_parse_state, list, type, config, $3));
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parse_events_terms__delete($3);
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$$ = 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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_numeric(_parse_state, list, type, config, NULL));
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$$ = list;
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}
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PE_VALUE_SYM_TOOL sep_slash_slash_dc
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{
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_tool(_parse_state, list, $1));
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$$ = list;
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}
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event_legacy_cache:
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PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT 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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6));
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parse_events_terms__delete($6);
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$$ = list;
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}
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PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT opt_event_config
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{
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struct parse_events_state *parse_state = _parse_state;
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struct parse_events_error *error = parse_state->error;
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4));
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parse_events_terms__delete($4);
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$$ = list;
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}
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PE_NAME_CACHE_TYPE 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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2));
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parse_events_terms__delete($2);
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$$ = list;
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}
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event_legacy_mem:
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PE_PREFIX_MEM PE_VALUE '/' PE_VALUE ':' PE_MODIFIER_BP sep_dc
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{
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struct parse_events_state *parse_state = _parse_state;
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
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(void *) $2, $6, $4));
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE '/' PE_VALUE sep_dc
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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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
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(void *) $2, NULL, $4));
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
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{
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struct parse_events_state *parse_state = _parse_state;
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
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(void *) $2, $4, 0));
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$$ = list;
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}
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PE_PREFIX_MEM PE_VALUE sep_dc
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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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
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(void *) $2, NULL, 0));
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$$ = list;
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}
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event_legacy_tracepoint:
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tracepoint_name opt_event_config
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{
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struct parse_events_state *parse_state = _parse_state;
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struct parse_events_error *error = parse_state->error;
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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if (error)
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error->idx = @1.first_column;
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if (parse_events_add_tracepoint(list, &parse_state->idx, $1.sys, $1.event,
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error, $2))
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return -1;
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$$ = list;
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}
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tracepoint_name:
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PE_NAME '-' PE_NAME ':' PE_NAME
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{
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char sys_name[128];
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struct tracepoint_name tracepoint;
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snprintf(&sys_name, 128, "%s-%s", $1, $3);
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tracepoint.sys = &sys_name;
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tracepoint.event = $5;
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$$ = tracepoint;
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}
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PE_NAME ':' PE_NAME
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{
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struct tracepoint_name tracepoint = {$1, $3};
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$$ = 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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_numeric(_parse_state, list, (u32)$1, $3, $4));
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parse_events_terms__delete($4);
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$$ = list;
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}
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event_legacy_raw:
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PE_RAW opt_event_config
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{
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_add_numeric(_parse_state, list, PERF_TYPE_RAW, $1, $2));
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parse_events_terms__delete($2);
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$$ = list;
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}
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event_bpf_file:
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PE_BPF_OBJECT 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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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_load_bpf(parse_state, list, $1, false, $2));
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parse_events_terms__delete($2);
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$$ = list;
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}
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PE_BPF_SOURCE opt_event_config
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{
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struct list_head *list;
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list = alloc_list();
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ABORT_ON(!list);
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ABORT_ON(parse_events_load_bpf(_parse_state, list, $1, true, $2));
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parse_events_terms__delete($2);
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$$ = list;
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}
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opt_event_config:
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'/' event_config '/'
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{
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$$ = $2;
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|
}
|
|
|
|
|
'/' '/'
|
|
{
|
|
$$ = NULL;
|
|
}
|
|
|
|
|
{
|
|
$$ = NULL;
|
|
}
|
|
|
|
opt_pmu_config:
|
|
'/' event_config '/'
|
|
{
|
|
$$ = $2;
|
|
}
|
|
|
|
|
'/' '/'
|
|
{
|
|
$$ = NULL;
|
|
}
|
|
|
|
start_terms: event_config
|
|
{
|
|
struct parse_events_state *parse_state = _parse_state;
|
|
parse_state->terms = $1;
|
|
}
|
|
|
|
event_config:
|
|
event_config ',' event_term
|
|
{
|
|
struct list_head *head = $1;
|
|
struct parse_events_term *term = $3;
|
|
|
|
ABORT_ON(!head);
|
|
list_add_tail(&term->list, head);
|
|
$$ = $1;
|
|
}
|
|
|
|
|
event_term
|
|
{
|
|
struct list_head *head = malloc(sizeof(*head));
|
|
struct parse_events_term *term = $1;
|
|
|
|
ABORT_ON(!head);
|
|
INIT_LIST_HEAD(head);
|
|
list_add_tail(&term->list, head);
|
|
$$ = head;
|
|
}
|
|
|
|
event_term:
|
|
PE_NAME '=' PE_NAME
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
|
|
$1, $3, &@1, &@3));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_NAME '=' PE_VALUE
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
|
|
$1, $3, false, &@1, &@3));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_NAME '=' PE_VALUE_SYM_HW
|
|
{
|
|
struct parse_events_term *term;
|
|
int config = $3 & 255;
|
|
|
|
ABORT_ON(parse_events_term__sym_hw(&term, $1, config));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_NAME
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
|
|
$1, 1, true, &@1, NULL));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_VALUE_SYM_HW
|
|
{
|
|
struct parse_events_term *term;
|
|
int config = $1 & 255;
|
|
|
|
ABORT_ON(parse_events_term__sym_hw(&term, NULL, config));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_TERM '=' PE_NAME
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__str(&term, (int)$1, NULL, $3, &@1, &@3));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_TERM '=' PE_VALUE
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, $3, false, &@1, &@3));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_TERM
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, 1, true, &@1, NULL));
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_NAME array '=' PE_NAME
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
|
|
$1, $4, &@1, &@4));
|
|
|
|
term->array = $2;
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_NAME array '=' PE_VALUE
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
|
|
$1, $4, false, &@1, &@4));
|
|
term->array = $2;
|
|
$$ = term;
|
|
}
|
|
|
|
|
PE_DRV_CFG_TERM
|
|
{
|
|
struct parse_events_term *term;
|
|
char *config = strdup($1);
|
|
|
|
ABORT_ON(!config);
|
|
ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG,
|
|
config, $1, &@1, NULL));
|
|
$$ = term;
|
|
}
|
|
|
|
array:
|
|
'[' array_terms ']'
|
|
{
|
|
$$ = $2;
|
|
}
|
|
|
|
|
PE_ARRAY_ALL
|
|
{
|
|
$$.nr_ranges = 0;
|
|
$$.ranges = NULL;
|
|
}
|
|
|
|
array_terms:
|
|
array_terms ',' array_term
|
|
{
|
|
struct parse_events_array new_array;
|
|
|
|
new_array.nr_ranges = $1.nr_ranges + $3.nr_ranges;
|
|
new_array.ranges = realloc($1.ranges,
|
|
sizeof(new_array.ranges[0]) *
|
|
new_array.nr_ranges);
|
|
ABORT_ON(!new_array.ranges);
|
|
memcpy(&new_array.ranges[$1.nr_ranges], $3.ranges,
|
|
$3.nr_ranges * sizeof(new_array.ranges[0]));
|
|
free($3.ranges);
|
|
$$ = new_array;
|
|
}
|
|
|
|
|
array_term
|
|
|
|
array_term:
|
|
PE_VALUE
|
|
{
|
|
struct parse_events_array array;
|
|
|
|
array.nr_ranges = 1;
|
|
array.ranges = malloc(sizeof(array.ranges[0]));
|
|
ABORT_ON(!array.ranges);
|
|
array.ranges[0].start = $1;
|
|
array.ranges[0].length = 1;
|
|
$$ = array;
|
|
}
|
|
|
|
|
PE_VALUE PE_ARRAY_RANGE PE_VALUE
|
|
{
|
|
struct parse_events_array array;
|
|
|
|
ABORT_ON($3 < $1);
|
|
array.nr_ranges = 1;
|
|
array.ranges = malloc(sizeof(array.ranges[0]));
|
|
ABORT_ON(!array.ranges);
|
|
array.ranges[0].start = $1;
|
|
array.ranges[0].length = $3 - $1 + 1;
|
|
$$ = array;
|
|
}
|
|
|
|
sep_dc: ':' |
|
|
|
|
sep_slash_slash_dc: '/' '/' | ':' |
|
|
|
|
%%
|
|
|
|
void parse_events_error(YYLTYPE *loc, void *parse_state,
|
|
void *scanner __maybe_unused,
|
|
char const *msg __maybe_unused)
|
|
{
|
|
parse_events_evlist_error(parse_state, loc->last_column, "parser error");
|
|
}
|