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                        = 1,
  54
  55         /* binary */
  56         FILTER_OP_MUL                           = 2,
  57         FILTER_OP_DIV                           = 3,
  58         FILTER_OP_MOD                           = 4,
  59         FILTER_OP_PLUS                          = 5,
  60         FILTER_OP_MINUS                         = 6,
  61         FILTER_OP_RSHIFT                        = 7,
  62         FILTER_OP_LSHIFT                        = 8,
  63         FILTER_OP_BIN_AND                       = 9,
  64         FILTER_OP_BIN_OR                        = 10,
  65         FILTER_OP_BIN_XOR                       = 11,
  66
  67         /* binary comparators */
  68         FILTER_OP_EQ                            = 12,
  69         FILTER_OP_NE                            = 13,
  70         FILTER_OP_GT                            = 14,
  71         FILTER_OP_LT                            = 15,
  72         FILTER_OP_GE                            = 16,
  73         FILTER_OP_LE                            = 17,
  74
  75         /* string binary comparator */
  76         FILTER_OP_EQ_STRING                     = 18,
  77         FILTER_OP_NE_STRING                     = 19,
  78         FILTER_OP_GT_STRING                     = 20,
  79         FILTER_OP_LT_STRING                     = 21,
  80         FILTER_OP_GE_STRING                     = 22,
  81         FILTER_OP_LE_STRING                     = 23,
  82
  83         /* s64 binary comparator */
  84         FILTER_OP_EQ_S64                        = 24,
  85         FILTER_OP_NE_S64                        = 25,
  86         FILTER_OP_GT_S64                        = 26,
  87         FILTER_OP_LT_S64                        = 27,
  88         FILTER_OP_GE_S64                        = 28,
  89         FILTER_OP_LE_S64                        = 29,
  90
  91         /* double binary comparator */
  92         FILTER_OP_EQ_DOUBLE                     = 30,
  93         FILTER_OP_NE_DOUBLE                     = 31,
  94         FILTER_OP_GT_DOUBLE                     = 32,
  95         FILTER_OP_LT_DOUBLE                     = 33,
  96         FILTER_OP_GE_DOUBLE                     = 34,
  97         FILTER_OP_LE_DOUBLE                     = 35,
  98
  99         /* Mixed S64-double binary comparators */
 100         FILTER_OP_EQ_DOUBLE_S64                 = 36,
 101         FILTER_OP_NE_DOUBLE_S64                 = 37,
 102         FILTER_OP_GT_DOUBLE_S64                 = 38,
 103         FILTER_OP_LT_DOUBLE_S64                 = 39,
 104         FILTER_OP_GE_DOUBLE_S64                 = 40,
 105         FILTER_OP_LE_DOUBLE_S64                 = 41,
 106
 107         FILTER_OP_EQ_S64_DOUBLE                 = 42,
 108         FILTER_OP_NE_S64_DOUBLE                 = 43,
 109         FILTER_OP_GT_S64_DOUBLE                 = 44,
 110         FILTER_OP_LT_S64_DOUBLE                 = 45,
 111         FILTER_OP_GE_S64_DOUBLE                 = 46,
 112         FILTER_OP_LE_S64_DOUBLE                 = 47,
 113
 114         /* unary */
 115         FILTER_OP_UNARY_PLUS                    = 48,
 116         FILTER_OP_UNARY_MINUS                   = 49,
 117         FILTER_OP_UNARY_NOT                     = 50,
 118         FILTER_OP_UNARY_PLUS_S64                = 51,
 119         FILTER_OP_UNARY_MINUS_S64               = 52,
 120         FILTER_OP_UNARY_NOT_S64                 = 53,
 121         FILTER_OP_UNARY_PLUS_DOUBLE             = 54,
 122         FILTER_OP_UNARY_MINUS_DOUBLE            = 55,
 123         FILTER_OP_UNARY_NOT_DOUBLE              = 56,
 124
 125         /* logical */
 126         FILTER_OP_AND                           = 57,
 127         FILTER_OP_OR                            = 58,
 128
 129         /* load */
 130         FILTER_OP_LOAD_FIELD_REF                = 59,
 131         FILTER_OP_LOAD_FIELD_REF_STRING         = 60,
 132         FILTER_OP_LOAD_FIELD_REF_SEQUENCE       = 61,
 133         FILTER_OP_LOAD_FIELD_REF_S64            = 62,
 134         FILTER_OP_LOAD_FIELD_REF_DOUBLE         = 63,
 135
 136         FILTER_OP_LOAD_STRING                   = 64,
 137         FILTER_OP_LOAD_S64                      = 65,
 138         FILTER_OP_LOAD_DOUBLE                   = 66,
 139
 140         /* cast */
 141         FILTER_OP_CAST_TO_S64                   = 67,
 142         FILTER_OP_CAST_DOUBLE_TO_S64            = 68,
 143         FILTER_OP_CAST_NOP                      = 69,
 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 */