src/lib/lttng-ctl/filter/filter-bytecode.h

   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 <common/sessiond-comm/sessiond-comm.h>
  26
  27 #include "filter-ast.h"
  28
  29 /*
  30  * offsets are absolute from start of bytecode.
  31  */
  32
  33 struct field_ref {
  34         /* Initially, symbol offset. After link, field offset. */
  35         uint16_t offset;
  36 } __attribute__((packed));
  37
  38 struct literal_numeric {
  39         int64_t v;
  40 } __attribute__((packed));
  41
  42 struct literal_double {
  43         double v;
  44 } __attribute__((packed));
  45
  46 struct literal_string {
  47         char string[0];
  48 } __attribute__((packed));
  49
  50 enum filter_op {
  51         FILTER_OP_UNKNOWN = 0,
  52
  53         FILTER_OP_RETURN,
  54
  55         /* binary */
  56         FILTER_OP_MUL,
  57         FILTER_OP_DIV,
  58         FILTER_OP_MOD,
  59         FILTER_OP_PLUS,
  60         FILTER_OP_MINUS,
  61         FILTER_OP_RSHIFT,
  62         FILTER_OP_LSHIFT,
  63         FILTER_OP_BIN_AND,
  64         FILTER_OP_BIN_OR,
  65         FILTER_OP_BIN_XOR,
  66
  67         /* binary comparators */
  68         FILTER_OP_EQ,
  69         FILTER_OP_NE,
  70         FILTER_OP_GT,
  71         FILTER_OP_LT,
  72         FILTER_OP_GE,
  73         FILTER_OP_LE,
  74
  75         /* string binary comparator */
  76         FILTER_OP_EQ_STRING,
  77         FILTER_OP_NE_STRING,
  78         FILTER_OP_GT_STRING,
  79         FILTER_OP_LT_STRING,
  80         FILTER_OP_GE_STRING,
  81         FILTER_OP_LE_STRING,
  82
  83         /* s64 binary comparator */
  84         FILTER_OP_EQ_S64,
  85         FILTER_OP_NE_S64,
  86         FILTER_OP_GT_S64,
  87         FILTER_OP_LT_S64,
  88         FILTER_OP_GE_S64,
  89         FILTER_OP_LE_S64,
  90
  91         /* double binary comparator */
  92         FILTER_OP_EQ_DOUBLE,
  93         FILTER_OP_NE_DOUBLE,
  94         FILTER_OP_GT_DOUBLE,
  95         FILTER_OP_LT_DOUBLE,
  96         FILTER_OP_GE_DOUBLE,
  97         FILTER_OP_LE_DOUBLE,
  98
  99         /* Mixed S64-double binary comparators */
 100         FILTER_OP_EQ_DOUBLE_S64,
 101         FILTER_OP_NE_DOUBLE_S64,
 102         FILTER_OP_GT_DOUBLE_S64,
 103         FILTER_OP_LT_DOUBLE_S64,
 104         FILTER_OP_GE_DOUBLE_S64,
 105         FILTER_OP_LE_DOUBLE_S64,
 106
 107         FILTER_OP_EQ_S64_DOUBLE,
 108         FILTER_OP_NE_S64_DOUBLE,
 109         FILTER_OP_GT_S64_DOUBLE,
 110         FILTER_OP_LT_S64_DOUBLE,
 111         FILTER_OP_GE_S64_DOUBLE,
 112         FILTER_OP_LE_S64_DOUBLE,
 113
 114         /* unary */
 115         FILTER_OP_UNARY_PLUS,
 116         FILTER_OP_UNARY_MINUS,
 117         FILTER_OP_UNARY_NOT,
 118         FILTER_OP_UNARY_PLUS_S64,
 119         FILTER_OP_UNARY_MINUS_S64,
 120         FILTER_OP_UNARY_NOT_S64,
 121         FILTER_OP_UNARY_PLUS_DOUBLE,
 122         FILTER_OP_UNARY_MINUS_DOUBLE,
 123         FILTER_OP_UNARY_NOT_DOUBLE,
 124
 125         /* logical */
 126         FILTER_OP_AND,
 127         FILTER_OP_OR,
 128
 129         /* load */
 130         FILTER_OP_LOAD_FIELD_REF,
 131         FILTER_OP_LOAD_FIELD_REF_STRING,
 132         FILTER_OP_LOAD_FIELD_REF_SEQUENCE,
 133         FILTER_OP_LOAD_FIELD_REF_S64,
 134         FILTER_OP_LOAD_FIELD_REF_DOUBLE,
 135
 136         FILTER_OP_LOAD_STRING,
 137         FILTER_OP_LOAD_S64,
 138         FILTER_OP_LOAD_DOUBLE,
 139
 140         /* cast */
 141         FILTER_OP_CAST_TO_S64,
 142         FILTER_OP_CAST_DOUBLE_TO_S64,
 143         FILTER_OP_CAST_NOP,
 144
 145         NR_FILTER_OPS,
 146 };
 147
 148 typedef uint8_t filter_opcode_t;
 149
 150 struct load_op {
 151         filter_opcode_t op;
 152         char data[0];
 153         /* data to load. Size known by enum filter_opcode and null-term char. */
 154 } __attribute__((packed));
 155
 156 struct binary_op {
 157         filter_opcode_t op;
 158 } __attribute__((packed));
 159
 160 struct unary_op {
 161         filter_opcode_t op;
 162 } __attribute__((packed));
 163
 164 /* skip_offset is absolute from start of bytecode */
 165 struct logical_op {
 166         filter_opcode_t op;
 167         uint16_t skip_offset;   /* bytecode insn, if skip second test */
 168 } __attribute__((packed));
 169
 170 struct cast_op {
 171         filter_opcode_t op;
 172 } __attribute__((packed));
 173
 174 struct return_op {
 175         filter_opcode_t op;
 176 } __attribute__((packed));
 177
 178 struct lttng_filter_bytecode_alloc {
 179         uint32_t alloc_len;
 180         struct lttng_filter_bytecode b;
 181 };
 182
 183 static inline
 184 unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode)
 185 {
 186         return bytecode->len;
 187 }
 188
 189 #endif /* _FILTER_BYTECODE_H */