projects / lttng-tools.git / blame
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| 953192ba MD |
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" |
| 953192ba MD |
27 | |
| 28 | /* | |
| 29 | * offsets are absolute from start of bytecode. | |
| 30 | */ | |
| 31 | ||
| 32 | enum filter_register { | |
| 33 | REG_R0 = 0, | |
| 34 | REG_R1 = 1, | |
| 35 | REG_ERROR, | |
| 36 | }; | |
| 37 | ||
| 38 | enum field_ref_type { | |
| 39 | FIELD_REF_UNKNOWN = 0, | |
| 40 | FIELD_REF_STRING, | |
| 41 | FIELD_REF_SEQUENCE, | |
| 42 | FIELD_REF_S64, | |
| 43 | }; | |
| 44 | ||
| 45 | struct field_ref { | |
| 46 | /* Initially, symbol offset. After link, field offset. */ | |
| 47 | uint16_t offset; | |
| 48 | uint8_t type; /* enum field_ref_type */ | |
| 49 | } __attribute__((packed)); | |
| 50 | ||
| 51 | struct literal_numeric { | |
| 52 | int64_t v; | |
| 53 | } __attribute__((packed)); | |
| 54 | ||
| 55 | struct literal_string { | |
| 56 | char string[0]; | |
| 57 | } __attribute__((packed)); | |
| 58 | ||
| 59 | enum filter_op { | |
| 60 | FILTER_OP_UNKNOWN = 0, | |
| 61 | ||
| 62 | FILTER_OP_RETURN, | |
| 63 | ||
| 64 | /* binary */ | |
| 65 | FILTER_OP_MUL, | |
| 66 | FILTER_OP_DIV, | |
| 67 | FILTER_OP_MOD, | |
| 68 | FILTER_OP_PLUS, | |
| 69 | FILTER_OP_MINUS, | |
| 70 | FILTER_OP_RSHIFT, | |
| 71 | FILTER_OP_LSHIFT, | |
| 72 | FILTER_OP_BIN_AND, | |
| 73 | FILTER_OP_BIN_OR, | |
| 74 | FILTER_OP_BIN_XOR, | |
| 75 | FILTER_OP_EQ, | |
| 76 | FILTER_OP_NE, | |
| 77 | FILTER_OP_GT, | |
| 78 | FILTER_OP_LT, | |
| 79 | FILTER_OP_GE, | |
| 80 | FILTER_OP_LE, | |
| 81 | ||
| 82 | /* unary */ | |
| 83 | FILTER_OP_UNARY_PLUS, | |
| 84 | FILTER_OP_UNARY_MINUS, | |
| 85 | FILTER_OP_UNARY_NOT, | |
| 86 | ||
| 87 | /* logical */ | |
| 88 | FILTER_OP_AND, | |
| 89 | FILTER_OP_OR, | |
| 90 | ||
| 91 | /* load */ | |
| 92 | FILTER_OP_LOAD_FIELD_REF, | |
| 93 | FILTER_OP_LOAD_STRING, | |
| 94 | FILTER_OP_LOAD_S64, | |
| 95 | ||
| 96 | NR_FILTER_OPS, | |
| 97 | }; | |
| 98 | ||
| 99 | typedef uint8_t filter_opcode_t; | |
| 100 | ||
| 101 | struct load_op { | |
| 102 | filter_opcode_t op; | |
| 103 | uint8_t reg; /* enum filter_register */ | |
| 104 | char data[0]; | |
| 105 | /* data to load. Size known by enum filter_opcode and null-term char. */ | |
| 106 | } __attribute__((packed)); | |
| 107 | ||
| 108 | struct binary_op { | |
| 109 | filter_opcode_t op; | |
| 110 | } __attribute__((packed)); | |
| 111 | ||
| 112 | struct unary_op { | |
| 113 | filter_opcode_t op; | |
| 114 | uint8_t reg; /* enum filter_register */ | |
| 115 | } __attribute__((packed)); | |
| 116 | ||
| 117 | /* skip_offset is absolute from start of bytecode */ | |
| 118 | struct logical_op { | |
| 119 | filter_opcode_t op; | |
| 120 | uint16_t skip_offset; /* bytecode insn, if skip second test */ | |
| 121 | } __attribute__((packed)); | |
| 122 | ||
| 123 | struct return_op { | |
| 124 | filter_opcode_t op; | |
| 125 | } __attribute__((packed)); | |
| 126 | ||
| 53a80697 | 127 | struct lttng_filter_bytecode_alloc { |
| 953192ba | 128 | uint16_t alloc_len; |
| 53a80697 | 129 | struct lttng_filter_bytecode b; |
| 953192ba MD |
130 | }; |
| 131 | ||
| 132 | static inline | |
| 53a80697 | 133 | unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode) |
| 953192ba MD |
134 | { |
| 135 | return bytecode->len; | |
| 136 | } | |
| 137 | ||
| 138 | #endif /* _FILTER_BYTECODE_H */ |