| %parse-param {struct list_head *expr_head} |
| %define parse.error verbose |
| |
| %{ |
| |
| #ifndef NDEBUG |
| #define YYDEBUG 1 |
| #endif |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <linux/compiler.h> |
| #include <linux/list.h> |
| #include "bpf-filter.h" |
| |
| int perf_bpf_filter_lex(void); |
| |
| static void perf_bpf_filter_error(struct list_head *expr __maybe_unused, |
| char const *msg) |
| { |
| printf("perf_bpf_filter: %s\n", msg); |
| } |
| |
| %} |
| |
| %union |
| { |
| unsigned long num; |
| struct { |
| enum perf_bpf_filter_term term; |
| int part; |
| } sample; |
| enum perf_bpf_filter_op op; |
| struct perf_bpf_filter_expr *expr; |
| } |
| |
| %token BFT_SAMPLE BFT_OP BFT_ERROR BFT_NUM BFT_LOGICAL_OR |
| %type <expr> filter_term filter_expr |
| %destructor { free ($$); } <expr> |
| %type <sample> BFT_SAMPLE |
| %type <op> BFT_OP |
| %type <num> BFT_NUM |
| |
| %% |
| |
| filter: |
| filter ',' filter_term |
| { |
| list_add_tail(&$3->list, expr_head); |
| } |
| | |
| filter_term |
| { |
| list_add_tail(&$1->list, expr_head); |
| } |
| |
| filter_term: |
| filter_term BFT_LOGICAL_OR filter_expr |
| { |
| struct perf_bpf_filter_expr *expr; |
| |
| if ($1->op == PBF_OP_GROUP_BEGIN) { |
| expr = $1; |
| } else { |
| expr = perf_bpf_filter_expr__new(PBF_TERM_NONE, /*part=*/0, |
| PBF_OP_GROUP_BEGIN, /*val=*/1); |
| list_add_tail(&$1->list, &expr->groups); |
| } |
| expr->val++; |
| list_add_tail(&$3->list, &expr->groups); |
| $$ = expr; |
| } |
| | |
| filter_expr |
| { |
| $$ = $1; |
| } |
| |
| filter_expr: |
| BFT_SAMPLE BFT_OP BFT_NUM |
| { |
| $$ = perf_bpf_filter_expr__new($1.term, $1.part, $2, $3); |
| } |
| |
| %% |