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1 | #ifndef _LTTNG_FILTER_H |
2 | #define _LTTNG_FILTER_H | |
3 | ||
4 | /* | |
5 | * lttng-filter.h | |
6 | * | |
7 | * LTTng UST filter header. | |
8 | * | |
9 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; only | |
14 | * version 2.1 of the License. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <errno.h> | |
27 | #include <stdio.h> | |
28 | #include <helper.h> | |
29 | #include <lttng/ust-events.h> | |
30 | #include <stdint.h> | |
31 | #include <errno.h> | |
32 | #include <string.h> | |
33 | #include <inttypes.h> | |
34 | #include <limits.h> | |
35 | #include <usterr-signal-safe.h> | |
36 | #include "filter-bytecode.h" | |
37 | ||
38 | #define NR_REG 2 | |
39 | ||
40 | #ifndef min_t | |
41 | #define min_t(type, a, b) \ | |
42 | ((type) (a) < (type) (b) ? (type) (a) : (type) (b)) | |
43 | #endif | |
44 | ||
45 | #ifndef likely | |
46 | #define likely(x) __builtin_expect(!!(x), 1) | |
47 | #endif | |
48 | ||
49 | #ifndef unlikely | |
50 | #define unlikely(x) __builtin_expect(!!(x), 0) | |
51 | #endif | |
52 | ||
53 | #ifdef DEBUG | |
54 | #define dbg_printf(fmt, args...) printf("[debug bytecode] " fmt, ## args) | |
55 | #else | |
56 | #define dbg_printf(fmt, args...) \ | |
57 | do { \ | |
58 | /* do nothing but check printf format */ \ | |
59 | if (0) \ | |
60 | printf("[debug bytecode] " fmt, ## args); \ | |
61 | } while (0) | |
62 | #endif | |
63 | ||
64 | /* Linked bytecode */ | |
65 | struct bytecode_runtime { | |
66 | uint16_t len; | |
67 | char data[0]; | |
68 | }; | |
69 | ||
70 | enum reg_type { | |
71 | REG_S64, | |
72 | REG_DOUBLE, | |
73 | REG_STRING, | |
74 | REG_TYPE_UNKNOWN, | |
75 | }; | |
76 | ||
77 | /* Validation registers */ | |
78 | struct vreg { | |
79 | enum reg_type type; | |
80 | int literal; /* is string literal ? */ | |
81 | }; | |
82 | ||
83 | /* Execution registers */ | |
84 | struct reg { | |
85 | enum reg_type type; | |
86 | int64_t v; | |
87 | double d; | |
88 | ||
89 | const char *str; | |
90 | size_t seq_len; | |
91 | int literal; /* is string literal ? */ | |
92 | }; | |
93 | ||
94 | const char *print_op(enum filter_op op); | |
95 | ||
96 | int lttng_filter_validate_bytecode(struct bytecode_runtime *bytecode); | |
97 | int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode); | |
98 | ||
99 | int lttng_filter_false(void *filter_data, | |
100 | const char *filter_stack_data); | |
101 | int lttng_filter_interpret_bytecode(void *filter_data, | |
102 | const char *filter_stack_data); | |
103 | ||
104 | #endif /* _LTTNG_FILTER_H */ |