df1b34c34eb55ad57c6b035cbfca5a855375cda6
[lttng-tools.git] / src / lib / lttng-ctl / 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 * 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
25 #include "filter-ast.h"
26 #include "../../common/sessiond-comm/sessiond-comm.h"
27
28 /*
29 * offsets are absolute from start of bytecode.
30 */
31
32 struct field_ref {
33 /* Initially, symbol offset. After link, field offset. */
34 uint16_t offset;
35 } __attribute__((packed));
36
37 struct literal_numeric {
38 int64_t v;
39 } __attribute__((packed));
40
41 struct literal_double {
42 double v;
43 } __attribute__((packed));
44
45 struct literal_string {
46 char string[0];
47 } __attribute__((packed));
48
49 enum filter_op {
50 FILTER_OP_UNKNOWN = 0,
51
52 FILTER_OP_RETURN,
53
54 /* binary */
55 FILTER_OP_MUL,
56 FILTER_OP_DIV,
57 FILTER_OP_MOD,
58 FILTER_OP_PLUS,
59 FILTER_OP_MINUS,
60 FILTER_OP_RSHIFT,
61 FILTER_OP_LSHIFT,
62 FILTER_OP_BIN_AND,
63 FILTER_OP_BIN_OR,
64 FILTER_OP_BIN_XOR,
65
66 /* binary comparators */
67 FILTER_OP_EQ,
68 FILTER_OP_NE,
69 FILTER_OP_GT,
70 FILTER_OP_LT,
71 FILTER_OP_GE,
72 FILTER_OP_LE,
73
74 /* string binary comparator */
75 FILTER_OP_EQ_STRING,
76 FILTER_OP_NE_STRING,
77 FILTER_OP_GT_STRING,
78 FILTER_OP_LT_STRING,
79 FILTER_OP_GE_STRING,
80 FILTER_OP_LE_STRING,
81
82 /* s64 binary comparator */
83 FILTER_OP_EQ_S64,
84 FILTER_OP_NE_S64,
85 FILTER_OP_GT_S64,
86 FILTER_OP_LT_S64,
87 FILTER_OP_GE_S64,
88 FILTER_OP_LE_S64,
89
90 /* double binary comparator */
91 FILTER_OP_EQ_DOUBLE,
92 FILTER_OP_NE_DOUBLE,
93 FILTER_OP_GT_DOUBLE,
94 FILTER_OP_LT_DOUBLE,
95 FILTER_OP_GE_DOUBLE,
96 FILTER_OP_LE_DOUBLE,
97
98 /* unary */
99 FILTER_OP_UNARY_PLUS,
100 FILTER_OP_UNARY_MINUS,
101 FILTER_OP_UNARY_NOT,
102 FILTER_OP_UNARY_PLUS_S64,
103 FILTER_OP_UNARY_MINUS_S64,
104 FILTER_OP_UNARY_NOT_S64,
105 FILTER_OP_UNARY_PLUS_DOUBLE,
106 FILTER_OP_UNARY_MINUS_DOUBLE,
107 FILTER_OP_UNARY_NOT_DOUBLE,
108
109 /* logical */
110 FILTER_OP_AND,
111 FILTER_OP_OR,
112
113 /* load */
114 FILTER_OP_LOAD_FIELD_REF,
115 FILTER_OP_LOAD_FIELD_REF_STRING,
116 FILTER_OP_LOAD_FIELD_REF_SEQUENCE,
117 FILTER_OP_LOAD_FIELD_REF_S64,
118 FILTER_OP_LOAD_FIELD_REF_DOUBLE,
119
120 FILTER_OP_LOAD_STRING,
121 FILTER_OP_LOAD_S64,
122 FILTER_OP_LOAD_DOUBLE,
123
124 /* cast */
125 FILTER_OP_CAST_TO_S64,
126 FILTER_OP_CAST_DOUBLE_TO_S64,
127 FILTER_OP_CAST_NOP,
128
129 NR_FILTER_OPS,
130 };
131
132 typedef uint8_t filter_opcode_t;
133
134 struct load_op {
135 filter_opcode_t op;
136 char data[0];
137 /* data to load. Size known by enum filter_opcode and null-term char. */
138 } __attribute__((packed));
139
140 struct binary_op {
141 filter_opcode_t op;
142 } __attribute__((packed));
143
144 struct unary_op {
145 filter_opcode_t op;
146 } __attribute__((packed));
147
148 /* skip_offset is absolute from start of bytecode */
149 struct logical_op {
150 filter_opcode_t op;
151 uint16_t skip_offset; /* bytecode insn, if skip second test */
152 } __attribute__((packed));
153
154 struct cast_op {
155 filter_opcode_t op;
156 } __attribute__((packed));
157
158 struct return_op {
159 filter_opcode_t op;
160 } __attribute__((packed));
161
162 struct lttng_filter_bytecode_alloc {
163 uint16_t alloc_len;
164 struct lttng_filter_bytecode b;
165 };
166
167 static inline
168 unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode)
169 {
170 return bytecode->len;
171 }
172
173 #endif /* _FILTER_BYTECODE_H */
This page took 0.044566 seconds and 3 git commands to generate.