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[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
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32struct field_ref {
33 /* Initially, symbol offset. After link, field offset. */
34 uint16_t offset;
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35} __attribute__((packed));
36
37struct literal_numeric {
38 int64_t v;
39} __attribute__((packed));
40
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41struct literal_double {
42 double v;
43} __attribute__((packed));
44
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45struct literal_string {
46 char string[0];
47} __attribute__((packed));
48
49enum 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,
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65
66 /* binary comparators */
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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
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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
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98 /* unary */
99 FILTER_OP_UNARY_PLUS,
100 FILTER_OP_UNARY_MINUS,
101 FILTER_OP_UNARY_NOT,
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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,
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108
109 /* logical */
110 FILTER_OP_AND,
111 FILTER_OP_OR,
112
113 /* load */
114 FILTER_OP_LOAD_FIELD_REF,
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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
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120 FILTER_OP_LOAD_STRING,
121 FILTER_OP_LOAD_S64,
e90d8561 122 FILTER_OP_LOAD_DOUBLE,
953192ba 123
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124 /* cast */
125 FILTER_OP_CAST_TO_S64,
126 FILTER_OP_CAST_DOUBLE_TO_S64,
127 FILTER_OP_CAST_NOP,
128
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129 NR_FILTER_OPS,
130};
131
132typedef uint8_t filter_opcode_t;
133
134struct load_op {
135 filter_opcode_t op;
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136 char data[0];
137 /* data to load. Size known by enum filter_opcode and null-term char. */
138} __attribute__((packed));
139
140struct binary_op {
141 filter_opcode_t op;
142} __attribute__((packed));
143
144struct unary_op {
145 filter_opcode_t op;
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146} __attribute__((packed));
147
148/* skip_offset is absolute from start of bytecode */
149struct logical_op {
150 filter_opcode_t op;
151 uint16_t skip_offset; /* bytecode insn, if skip second test */
152} __attribute__((packed));
153
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154struct cast_op {
155 filter_opcode_t op;
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156} __attribute__((packed));
157
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158struct return_op {
159 filter_opcode_t op;
160} __attribute__((packed));
161
53a80697 162struct lttng_filter_bytecode_alloc {
953192ba 163 uint16_t alloc_len;
53a80697 164 struct lttng_filter_bytecode b;
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165};
166
167static inline
53a80697 168unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode)
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169{
170 return bytecode->len;
171}
172
173#endif /* _FILTER_BYTECODE_H */
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