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953192ba MD |
1 | #ifndef _FILTER_AST_H |
2 | #define _FILTER_AST_H | |
3 | ||
4 | /* | |
5 | * filter-ast.h | |
6 | * | |
7 | * LTTng filter AST | |
8 | * | |
9 | * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
13 | * as published by the Free Software Foundation. | |
14 | * | |
15 | * This library is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public License | |
21 | * along with this library; if not, write to the Free Software Foundation, | |
22 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | */ | |
24 | ||
95b9bd90 MD |
25 | /* |
26 | * Note: filter-ast.h should be included before filter-parser.h. | |
27 | */ | |
28 | ||
953192ba MD |
29 | #include <urcu/list.h> |
30 | #include <stdint.h> | |
31 | ||
32 | #define printf_debug(fmt, args...) \ | |
33 | do { \ | |
34 | if (filter_parser_debug) \ | |
35 | fprintf(stdout, "[debug] " fmt, ## args); \ | |
36 | } while (0) | |
37 | ||
af71d06b MD |
38 | // the parameter name (of the reentrant 'yyparse' function) |
39 | // data is a pointer to a 'SParserParam' structure | |
40 | //#define YYPARSE_PARAM parser_ctx | |
41 | ||
953192ba MD |
42 | #ifndef YY_TYPEDEF_YY_SCANNER_T |
43 | #define YY_TYPEDEF_YY_SCANNER_T | |
44 | typedef void* yyscan_t; | |
45 | #endif | |
46 | ||
47 | extern int filter_parser_debug; | |
48 | ||
49 | struct filter_node; | |
50 | struct filter_parser; | |
51 | ||
52 | enum node_type { | |
53 | NODE_UNKNOWN = 0, | |
54 | NODE_ROOT, | |
55 | ||
56 | NODE_EXPRESSION, | |
57 | NODE_OP, | |
58 | NODE_UNARY_OP, | |
59 | ||
60 | NR_NODE_TYPES, | |
61 | }; | |
62 | ||
63 | enum op_type { | |
64 | AST_OP_UNKNOWN = 0, | |
65 | AST_OP_MUL, | |
66 | AST_OP_DIV, | |
67 | AST_OP_MOD, | |
68 | AST_OP_PLUS, | |
69 | AST_OP_MINUS, | |
116d3c01 MD |
70 | AST_OP_BIT_RSHIFT, |
71 | AST_OP_BIT_LSHIFT, | |
953192ba MD |
72 | AST_OP_AND, |
73 | AST_OP_OR, | |
bff988fa MD |
74 | AST_OP_BIT_AND, |
75 | AST_OP_BIT_OR, | |
76 | AST_OP_BIT_XOR, | |
953192ba MD |
77 | |
78 | AST_OP_EQ, | |
79 | AST_OP_NE, | |
80 | AST_OP_GT, | |
81 | AST_OP_LT, | |
82 | AST_OP_GE, | |
83 | AST_OP_LE, | |
84 | }; | |
85 | ||
86 | enum unary_op_type { | |
87 | AST_UNARY_UNKNOWN = 0, | |
88 | AST_UNARY_PLUS, | |
89 | AST_UNARY_MINUS, | |
90 | AST_UNARY_NOT, | |
bff988fa | 91 | AST_UNARY_BIT_NOT, |
953192ba MD |
92 | }; |
93 | ||
94 | enum ast_link_type { | |
95 | AST_LINK_UNKNOWN = 0, | |
96 | AST_LINK_DOT, | |
97 | AST_LINK_RARROW, | |
661dfdd1 | 98 | AST_LINK_BRACKET, |
953192ba MD |
99 | }; |
100 | ||
101 | struct filter_node { | |
102 | /* | |
103 | * Parent node is only set on demand by specific visitor. | |
104 | */ | |
105 | struct filter_node *parent; | |
106 | struct cds_list_head gc; | |
107 | ||
108 | enum node_type type; | |
109 | union { | |
110 | struct { | |
111 | } unknown; | |
112 | struct { | |
113 | struct filter_node *child; | |
114 | } root; | |
115 | struct { | |
116 | enum { | |
117 | AST_EXP_UNKNOWN = 0, | |
118 | AST_EXP_STRING, | |
119 | AST_EXP_CONSTANT, | |
e90d8561 | 120 | AST_EXP_FLOAT_CONSTANT, |
953192ba | 121 | AST_EXP_IDENTIFIER, |
586dc72f | 122 | AST_EXP_GLOBAL_IDENTIFIER, |
953192ba MD |
123 | AST_EXP_NESTED, |
124 | } type; | |
125 | enum ast_link_type post_op; /* reverse */ | |
126 | enum ast_link_type pre_op; /* forward */ | |
127 | union { | |
128 | char *string; | |
129 | uint64_t constant; | |
e90d8561 | 130 | double float_constant; |
953192ba MD |
131 | char *identifier; |
132 | /* | |
133 | * child can be nested. | |
134 | */ | |
135 | struct filter_node *child; | |
136 | } u; | |
bff988fa | 137 | /* prev: backward dot/arrow chain (postfix expression) */ |
953192ba | 138 | struct filter_node *prev; |
bff988fa | 139 | /* next: forward dot/arrow chain, generated by a visitor. */ |
953192ba | 140 | struct filter_node *next; |
bff988fa MD |
141 | /* next_bracket: linked bracket chain (prefix expression) */ |
142 | struct filter_node *next_bracket; | |
953192ba MD |
143 | } expression; |
144 | struct { | |
145 | enum op_type type; | |
146 | struct filter_node *lchild; | |
147 | struct filter_node *rchild; | |
148 | } op; | |
149 | struct { | |
150 | enum unary_op_type type; | |
151 | struct filter_node *child; | |
152 | } unary_op; | |
153 | } u; | |
154 | }; | |
155 | ||
156 | struct filter_ast { | |
157 | struct filter_node root; | |
158 | struct cds_list_head allocated_nodes; | |
159 | }; | |
160 | ||
161 | const char *node_type(struct filter_node *node); | |
162 | ||
163 | struct ir_op; | |
953192ba MD |
164 | |
165 | struct filter_parser_ctx { | |
166 | yyscan_t scanner; | |
167 | struct filter_ast *ast; | |
168 | struct cds_list_head allocated_strings; | |
169 | struct ir_op *ir_root; | |
53a80697 MD |
170 | struct lttng_filter_bytecode_alloc *bytecode; |
171 | struct lttng_filter_bytecode_alloc *bytecode_reloc; | |
953192ba MD |
172 | }; |
173 | ||
174 | struct filter_parser_ctx *filter_parser_ctx_alloc(FILE *input); | |
175 | void filter_parser_ctx_free(struct filter_parser_ctx *parser_ctx); | |
176 | int filter_parser_ctx_append_ast(struct filter_parser_ctx *parser_ctx); | |
177 | ||
178 | static inline | |
179 | struct filter_ast *filter_parser_get_ast(struct filter_parser_ctx *parser_ctx) | |
180 | { | |
181 | return parser_ctx->ast; | |
182 | } | |
183 | ||
953192ba MD |
184 | int filter_visitor_print_xml(struct filter_parser_ctx *ctx, FILE *stream, |
185 | int indent); | |
186 | int filter_visitor_ir_generate(struct filter_parser_ctx *ctx); | |
187 | void filter_ir_free(struct filter_parser_ctx *ctx); | |
188 | int filter_visitor_bytecode_generate(struct filter_parser_ctx *ctx); | |
189 | void filter_bytecode_free(struct filter_parser_ctx *ctx); | |
190 | int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx); | |
191 | int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx); | |
dcd5daf2 | 192 | int filter_visitor_ir_validate_string(struct filter_parser_ctx *ctx); |
9f449915 PP |
193 | int filter_visitor_ir_normalize_glob_patterns(struct filter_parser_ctx *ctx); |
194 | int filter_visitor_ir_validate_globbing(struct filter_parser_ctx *ctx); | |
953192ba MD |
195 | |
196 | #endif /* _FILTER_AST_H */ |