1 #ifndef _FILTER_BYTECODE_H
2 #define _FILTER_BYTECODE_H
7 * LTTng filter bytecode
9 * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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
25 #include "filter-ast.h"
26 #include "../../common/sessiond-comm/sessiond-comm.h"
29 * offsets are absolute from start of bytecode.
32 enum filter_register
{
39 FIELD_REF_UNKNOWN
= 0,
46 /* Initially, symbol offset. After link, field offset. */
48 uint8_t type
; /* enum field_ref_type */
49 } __attribute__((packed
));
51 struct literal_numeric
{
53 } __attribute__((packed
));
55 struct literal_string
{
57 } __attribute__((packed
));
60 FILTER_OP_UNKNOWN
= 0,
84 FILTER_OP_UNARY_MINUS
,
92 FILTER_OP_LOAD_FIELD_REF
,
93 FILTER_OP_LOAD_STRING
,
99 typedef uint8_t filter_opcode_t
;
103 uint8_t reg
; /* enum filter_register */
105 /* data to load. Size known by enum filter_opcode and null-term char. */
106 } __attribute__((packed
));
110 } __attribute__((packed
));
114 uint8_t reg
; /* enum filter_register */
115 } __attribute__((packed
));
117 /* skip_offset is absolute from start of bytecode */
120 uint16_t skip_offset
; /* bytecode insn, if skip second test */
121 } __attribute__((packed
));
125 } __attribute__((packed
));
127 struct lttng_filter_bytecode_alloc
{
129 struct lttng_filter_bytecode b
;
133 unsigned int bytecode_get_len(struct lttng_filter_bytecode
*bytecode
)
135 return bytecode
->len
;
138 #endif /* _FILTER_BYTECODE_H */