Filter: specialize 'and' and 'or' ops
[lttng-tools.git] / src / lib / lttng-ctl / filter-bytecode.h
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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"
53a80697 26#include "../../common/sessiond-comm/sessiond-comm.h"
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27
28/*
29 * offsets are absolute from start of bytecode.
30 */
31
32enum filter_register {
33 REG_R0 = 0,
34 REG_R1 = 1,
35 REG_ERROR,
36};
37
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38struct field_ref {
39 /* Initially, symbol offset. After link, field offset. */
40 uint16_t offset;
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41} __attribute__((packed));
42
43struct literal_numeric {
44 int64_t v;
45} __attribute__((packed));
46
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47struct literal_double {
48 double v;
49} __attribute__((packed));
50
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51struct literal_string {
52 char string[0];
53} __attribute__((packed));
54
55enum filter_op {
56 FILTER_OP_UNKNOWN = 0,
57
58 FILTER_OP_RETURN,
59
60 /* binary */
61 FILTER_OP_MUL,
62 FILTER_OP_DIV,
63 FILTER_OP_MOD,
64 FILTER_OP_PLUS,
65 FILTER_OP_MINUS,
66 FILTER_OP_RSHIFT,
67 FILTER_OP_LSHIFT,
68 FILTER_OP_BIN_AND,
69 FILTER_OP_BIN_OR,
70 FILTER_OP_BIN_XOR,
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71
72 /* binary comparators */
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73 FILTER_OP_EQ,
74 FILTER_OP_NE,
75 FILTER_OP_GT,
76 FILTER_OP_LT,
77 FILTER_OP_GE,
78 FILTER_OP_LE,
79
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80 /* string binary comparator */
81 FILTER_OP_EQ_STRING,
82 FILTER_OP_NE_STRING,
83 FILTER_OP_GT_STRING,
84 FILTER_OP_LT_STRING,
85 FILTER_OP_GE_STRING,
86 FILTER_OP_LE_STRING,
87
88 /* s64 binary comparator */
89 FILTER_OP_EQ_S64,
90 FILTER_OP_NE_S64,
91 FILTER_OP_GT_S64,
92 FILTER_OP_LT_S64,
93 FILTER_OP_GE_S64,
94 FILTER_OP_LE_S64,
95
96 /* double binary comparator */
97 FILTER_OP_EQ_DOUBLE,
98 FILTER_OP_NE_DOUBLE,
99 FILTER_OP_GT_DOUBLE,
100 FILTER_OP_LT_DOUBLE,
101 FILTER_OP_GE_DOUBLE,
102 FILTER_OP_LE_DOUBLE,
103
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104 /* unary */
105 FILTER_OP_UNARY_PLUS,
106 FILTER_OP_UNARY_MINUS,
107 FILTER_OP_UNARY_NOT,
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108 FILTER_OP_UNARY_PLUS_S64,
109 FILTER_OP_UNARY_MINUS_S64,
110 FILTER_OP_UNARY_NOT_S64,
111 FILTER_OP_UNARY_PLUS_DOUBLE,
112 FILTER_OP_UNARY_MINUS_DOUBLE,
113 FILTER_OP_UNARY_NOT_DOUBLE,
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114
115 /* logical */
116 FILTER_OP_AND,
117 FILTER_OP_OR,
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118 FILTER_OP_AND_S64,
119 FILTER_OP_OR_S64,
120 FILTER_OP_AND_DOUBLE,
121 FILTER_OP_OR_DOUBLE,
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122
123 /* load */
124 FILTER_OP_LOAD_FIELD_REF,
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125 FILTER_OP_LOAD_FIELD_REF_STRING,
126 FILTER_OP_LOAD_FIELD_REF_SEQUENCE,
127 FILTER_OP_LOAD_FIELD_REF_S64,
128 FILTER_OP_LOAD_FIELD_REF_DOUBLE,
129
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130 FILTER_OP_LOAD_STRING,
131 FILTER_OP_LOAD_S64,
e90d8561 132 FILTER_OP_LOAD_DOUBLE,
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133
134 NR_FILTER_OPS,
135};
136
137typedef uint8_t filter_opcode_t;
138
139struct load_op {
140 filter_opcode_t op;
141 uint8_t reg; /* enum filter_register */
142 char data[0];
143 /* data to load. Size known by enum filter_opcode and null-term char. */
144} __attribute__((packed));
145
146struct binary_op {
147 filter_opcode_t op;
148} __attribute__((packed));
149
150struct unary_op {
151 filter_opcode_t op;
152 uint8_t reg; /* enum filter_register */
153} __attribute__((packed));
154
155/* skip_offset is absolute from start of bytecode */
156struct logical_op {
157 filter_opcode_t op;
158 uint16_t skip_offset; /* bytecode insn, if skip second test */
159} __attribute__((packed));
160
161struct return_op {
162 filter_opcode_t op;
163} __attribute__((packed));
164
53a80697 165struct lttng_filter_bytecode_alloc {
953192ba 166 uint16_t alloc_len;
53a80697 167 struct lttng_filter_bytecode b;
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168};
169
170static inline
53a80697 171unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode)
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172{
173 return bytecode->len;
174}
175
176#endif /* _FILTER_BYTECODE_H */
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