053bb08bb5ef2a2b6d0589ba447d541f1d4f3694
[lttng-tools.git] / src / common / filter / filter-bytecode.h
1 #ifndef _FILTER_BYTECODE_H
2 #define _FILTER_BYTECODE_H
3
4 /*
5 * filter-bytecode.h
6 *
7 * LTTng filter bytecode
8 *
9 * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 *
11 * SPDX-License-Identifier: LGPL-2.1-only
12 *
13 */
14
15 #include <common/sessiond-comm/sessiond-comm.h>
16 #include <common/macros.h>
17
18 #include "filter-ast.h"
19
20 /*
21 * offsets are absolute from start of bytecode.
22 */
23
24 struct field_ref {
25 /* Initially, symbol offset. After link, field offset. */
26 uint16_t offset;
27 } LTTNG_PACKED;
28
29 struct get_symbol {
30 /* Symbol offset. */
31 uint16_t offset;
32 } LTTNG_PACKED;
33
34 struct get_index_u16 {
35 uint16_t index;
36 } LTTNG_PACKED;
37
38 struct get_index_u64 {
39 uint64_t index;
40 } LTTNG_PACKED;
41
42 struct literal_numeric {
43 int64_t v;
44 } LTTNG_PACKED;
45
46 struct literal_double {
47 double v;
48 } LTTNG_PACKED;
49
50 struct literal_string {
51 char string[0];
52 } LTTNG_PACKED;
53
54 enum filter_op {
55 FILTER_OP_UNKNOWN = 0,
56
57 FILTER_OP_RETURN = 1,
58
59 /* binary */
60 FILTER_OP_MUL = 2,
61 FILTER_OP_DIV = 3,
62 FILTER_OP_MOD = 4,
63 FILTER_OP_PLUS = 5,
64 FILTER_OP_MINUS = 6,
65 FILTER_OP_BIT_RSHIFT = 7,
66 FILTER_OP_BIT_LSHIFT = 8,
67 FILTER_OP_BIT_AND = 9,
68 FILTER_OP_BIT_OR = 10,
69 FILTER_OP_BIT_XOR = 11,
70
71 /* binary comparators */
72 FILTER_OP_EQ = 12,
73 FILTER_OP_NE = 13,
74 FILTER_OP_GT = 14,
75 FILTER_OP_LT = 15,
76 FILTER_OP_GE = 16,
77 FILTER_OP_LE = 17,
78
79 /* string binary comparator: apply to */
80 FILTER_OP_EQ_STRING = 18,
81 FILTER_OP_NE_STRING = 19,
82 FILTER_OP_GT_STRING = 20,
83 FILTER_OP_LT_STRING = 21,
84 FILTER_OP_GE_STRING = 22,
85 FILTER_OP_LE_STRING = 23,
86
87 /* s64 binary comparator */
88 FILTER_OP_EQ_S64 = 24,
89 FILTER_OP_NE_S64 = 25,
90 FILTER_OP_GT_S64 = 26,
91 FILTER_OP_LT_S64 = 27,
92 FILTER_OP_GE_S64 = 28,
93 FILTER_OP_LE_S64 = 29,
94
95 /* double binary comparator */
96 FILTER_OP_EQ_DOUBLE = 30,
97 FILTER_OP_NE_DOUBLE = 31,
98 FILTER_OP_GT_DOUBLE = 32,
99 FILTER_OP_LT_DOUBLE = 33,
100 FILTER_OP_GE_DOUBLE = 34,
101 FILTER_OP_LE_DOUBLE = 35,
102
103 /* Mixed S64-double binary comparators */
104 FILTER_OP_EQ_DOUBLE_S64 = 36,
105 FILTER_OP_NE_DOUBLE_S64 = 37,
106 FILTER_OP_GT_DOUBLE_S64 = 38,
107 FILTER_OP_LT_DOUBLE_S64 = 39,
108 FILTER_OP_GE_DOUBLE_S64 = 40,
109 FILTER_OP_LE_DOUBLE_S64 = 41,
110
111 FILTER_OP_EQ_S64_DOUBLE = 42,
112 FILTER_OP_NE_S64_DOUBLE = 43,
113 FILTER_OP_GT_S64_DOUBLE = 44,
114 FILTER_OP_LT_S64_DOUBLE = 45,
115 FILTER_OP_GE_S64_DOUBLE = 46,
116 FILTER_OP_LE_S64_DOUBLE = 47,
117
118 /* unary */
119 FILTER_OP_UNARY_PLUS = 48,
120 FILTER_OP_UNARY_MINUS = 49,
121 FILTER_OP_UNARY_NOT = 50,
122 FILTER_OP_UNARY_PLUS_S64 = 51,
123 FILTER_OP_UNARY_MINUS_S64 = 52,
124 FILTER_OP_UNARY_NOT_S64 = 53,
125 FILTER_OP_UNARY_PLUS_DOUBLE = 54,
126 FILTER_OP_UNARY_MINUS_DOUBLE = 55,
127 FILTER_OP_UNARY_NOT_DOUBLE = 56,
128
129 /* logical */
130 FILTER_OP_AND = 57,
131 FILTER_OP_OR = 58,
132
133 /* load field ref */
134 FILTER_OP_LOAD_FIELD_REF = 59,
135 FILTER_OP_LOAD_FIELD_REF_STRING = 60,
136 FILTER_OP_LOAD_FIELD_REF_SEQUENCE = 61,
137 FILTER_OP_LOAD_FIELD_REF_S64 = 62,
138 FILTER_OP_LOAD_FIELD_REF_DOUBLE = 63,
139
140 /* load immediate from operand */
141 FILTER_OP_LOAD_STRING = 64,
142 FILTER_OP_LOAD_S64 = 65,
143 FILTER_OP_LOAD_DOUBLE = 66,
144
145 /* cast */
146 FILTER_OP_CAST_TO_S64 = 67,
147 FILTER_OP_CAST_DOUBLE_TO_S64 = 68,
148 FILTER_OP_CAST_NOP = 69,
149
150 /* get context ref */
151 FILTER_OP_GET_CONTEXT_REF = 70,
152 FILTER_OP_GET_CONTEXT_REF_STRING = 71,
153 FILTER_OP_GET_CONTEXT_REF_S64 = 72,
154 FILTER_OP_GET_CONTEXT_REF_DOUBLE = 73,
155
156 /* load userspace field ref */
157 FILTER_OP_LOAD_FIELD_REF_USER_STRING = 74,
158 FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE = 75,
159
160 /*
161 * load immediate star globbing pattern (literal string)
162 * from immediate
163 */
164 FILTER_OP_LOAD_STAR_GLOB_STRING = 76,
165
166 /* globbing pattern binary operator: apply to */
167 FILTER_OP_EQ_STAR_GLOB_STRING = 77,
168 FILTER_OP_NE_STAR_GLOB_STRING = 78,
169
170 /*
171 * Instructions for recursive traversal through composed types.
172 */
173 FILTER_OP_GET_CONTEXT_ROOT = 79,
174 FILTER_OP_GET_APP_CONTEXT_ROOT = 80,
175 FILTER_OP_GET_PAYLOAD_ROOT = 81,
176
177 FILTER_OP_GET_SYMBOL = 82,
178 FILTER_OP_GET_SYMBOL_FIELD = 83,
179 FILTER_OP_GET_INDEX_U16 = 84,
180 FILTER_OP_GET_INDEX_U64 = 85,
181
182 FILTER_OP_LOAD_FIELD = 86,
183 FILTER_OP_LOAD_FIELD_S8 = 87,
184 FILTER_OP_LOAD_FIELD_S16 = 88,
185 FILTER_OP_LOAD_FIELD_S32 = 89,
186 FILTER_OP_LOAD_FIELD_S64 = 90,
187 FILTER_OP_LOAD_FIELD_U8 = 91,
188 FILTER_OP_LOAD_FIELD_U16 = 92,
189 FILTER_OP_LOAD_FIELD_U32 = 93,
190 FILTER_OP_LOAD_FIELD_U64 = 94,
191 FILTER_OP_LOAD_FIELD_STRING = 95,
192 FILTER_OP_LOAD_FIELD_SEQUENCE = 96,
193 FILTER_OP_LOAD_FIELD_DOUBLE = 97,
194
195 FILTER_OP_UNARY_BIT_NOT = 98,
196
197 FILTER_OP_RETURN_S64 = 99,
198
199 NR_FILTER_OPS,
200 };
201
202 typedef uint8_t filter_opcode_t;
203
204 struct load_op {
205 filter_opcode_t op;
206 char data[0];
207 /* data to load. Size known by enum filter_opcode and null-term char. */
208 } LTTNG_PACKED;
209
210 struct binary_op {
211 filter_opcode_t op;
212 } LTTNG_PACKED;
213
214 struct unary_op {
215 filter_opcode_t op;
216 } LTTNG_PACKED;
217
218 /* skip_offset is absolute from start of bytecode */
219 struct logical_op {
220 filter_opcode_t op;
221 uint16_t skip_offset; /* bytecode insn, if skip second test */
222 } LTTNG_PACKED;
223
224 struct cast_op {
225 filter_opcode_t op;
226 } LTTNG_PACKED;
227
228 struct return_op {
229 filter_opcode_t op;
230 } LTTNG_PACKED;
231
232 struct lttng_filter_bytecode_alloc {
233 uint32_t alloc_len;
234 struct lttng_filter_bytecode b;
235 };
236
237 static inline
238 unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode)
239 {
240 return bytecode->len;
241 }
242
243 #endif /* _FILTER_BYTECODE_H */
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