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759 lines
32 KiB
759 lines
32 KiB
/*
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* Opcodes (c) 1998 Jochen Hoenicke
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*
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* You may distribute under the terms of the GNU General Public License.
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*
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* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
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* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* $Id$
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*/
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package jode;
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import jode.flow.*;
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import java.io.*;
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import gnu.bytecode.CpoolRef;
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import gnu.bytecode.CpoolClass;
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/**
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* This is an abstract class which creates flow blocks for the
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* opcodes in a byte stream.
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*/
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public abstract class Opcodes {
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public final static Type ALL_INT_TYPE = Type.tUInt;
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public final static Type BOOL_INT_TYPE = Type.tBoolInt;
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public final static Type INT_TYPE = Type.tInt;
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public final static Type LONG_TYPE = Type.tLong;
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public final static Type FLOAT_TYPE = Type.tFloat;
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public final static Type DOUBLE_TYPE = Type.tDouble;
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public final static Type OBJECT_TYPE = Type.tUObject;
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public final static Type BOOLEAN_TYPE = Type.tBoolean;
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public final static Type BYTEBOOL_TYPE = Type.tBoolByte;
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public final static Type BYTE_TYPE = Type.tByte;
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public final static Type CHAR_TYPE = Type.tChar;
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public final static Type SHORT_TYPE = Type.tShort;
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public final static Type VOID_TYPE = Type.tVoid;
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public final static Type types[][] = {
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{BOOL_INT_TYPE, LONG_TYPE, FLOAT_TYPE, DOUBLE_TYPE, OBJECT_TYPE },
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{ INT_TYPE, LONG_TYPE, FLOAT_TYPE, DOUBLE_TYPE, OBJECT_TYPE,
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BYTEBOOL_TYPE, CHAR_TYPE, SHORT_TYPE },
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{ BYTE_TYPE, CHAR_TYPE, SHORT_TYPE },
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{ ALL_INT_TYPE, LONG_TYPE, FLOAT_TYPE, DOUBLE_TYPE, OBJECT_TYPE }
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};
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public static final int opc_nop = 0;
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public static final int opc_aconst_null = 1;
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public static final int opc_iconst_m1 = 2;
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public static final int opc_iconst_0 = 3;
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public static final int opc_iconst_1 = 4;
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public static final int opc_iconst_2 = 5;
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public static final int opc_iconst_3 = 6;
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public static final int opc_iconst_4 = 7;
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public static final int opc_iconst_5 = 8;
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public static final int opc_lconst_0 = 9;
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public static final int opc_lconst_1 = 10;
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public static final int opc_fconst_0 = 11;
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public static final int opc_fconst_1 = 12;
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public static final int opc_fconst_2 = 13;
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public static final int opc_dconst_0 = 14;
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public static final int opc_dconst_1 = 15;
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public static final int opc_bipush = 16;
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public static final int opc_sipush = 17;
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public static final int opc_ldc = 18;
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public static final int opc_ldc_w = 19;
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public static final int opc_ldc2_w = 20;
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public static final int opc_iload = 21;
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public static final int opc_lload = 22;
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public static final int opc_fload = 23;
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public static final int opc_dload = 24;
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public static final int opc_aload = 25;
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public static final int opc_iload_0 = 26;
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public static final int opc_iload_1 = 27;
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public static final int opc_iload_2 = 28;
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public static final int opc_iload_3 = 29;
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public static final int opc_lload_0 = 30;
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public static final int opc_lload_1 = 31;
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public static final int opc_lload_2 = 32;
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public static final int opc_lload_3 = 33;
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public static final int opc_fload_0 = 34;
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public static final int opc_fload_1 = 35;
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public static final int opc_fload_2 = 36;
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public static final int opc_fload_3 = 37;
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public static final int opc_dload_0 = 38;
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public static final int opc_dload_1 = 39;
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public static final int opc_dload_2 = 40;
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public static final int opc_dload_3 = 41;
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public static final int opc_aload_0 = 42;
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public static final int opc_aload_1 = 43;
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public static final int opc_aload_2 = 44;
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public static final int opc_aload_3 = 45;
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public static final int opc_iaload = 46;
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public static final int opc_laload = 47;
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public static final int opc_faload = 48;
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public static final int opc_daload = 49;
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public static final int opc_aaload = 50;
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public static final int opc_baload = 51;
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public static final int opc_caload = 52;
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public static final int opc_saload = 53;
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public static final int opc_istore = 54;
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public static final int opc_lstore = 55;
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public static final int opc_fstore = 56;
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public static final int opc_dstore = 57;
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public static final int opc_astore = 58;
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public static final int opc_istore_0 = 59;
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public static final int opc_istore_1 = 60;
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public static final int opc_istore_2 = 61;
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public static final int opc_istore_3 = 62;
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public static final int opc_lstore_0 = 63;
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public static final int opc_lstore_1 = 64;
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public static final int opc_lstore_2 = 65;
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public static final int opc_lstore_3 = 66;
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public static final int opc_fstore_0 = 67;
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public static final int opc_fstore_1 = 68;
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public static final int opc_fstore_2 = 69;
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public static final int opc_fstore_3 = 70;
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public static final int opc_dstore_0 = 71;
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public static final int opc_dstore_1 = 72;
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public static final int opc_dstore_2 = 73;
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public static final int opc_dstore_3 = 74;
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public static final int opc_astore_0 = 75;
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public static final int opc_astore_1 = 76;
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public static final int opc_astore_2 = 77;
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public static final int opc_astore_3 = 78;
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public static final int opc_iastore = 79;
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public static final int opc_lastore = 80;
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public static final int opc_fastore = 81;
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public static final int opc_dastore = 82;
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public static final int opc_aastore = 83;
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public static final int opc_bastore = 84;
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public static final int opc_castore = 85;
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public static final int opc_sastore = 86;
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public static final int opc_pop = 87;
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public static final int opc_pop2 = 88;
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public static final int opc_dup = 89;
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public static final int opc_dup_x1 = 90;
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public static final int opc_dup_x2 = 91;
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public static final int opc_dup2 = 92;
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public static final int opc_dup2_x1 = 93;
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public static final int opc_dup2_x2 = 94;
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public static final int opc_swap = 95;
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public static final int opc_iadd = 96;
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public static final int opc_ladd = 97;
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public static final int opc_fadd = 98;
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public static final int opc_dadd = 99;
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public static final int opc_isub = 100;
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public static final int opc_lsub = 101;
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public static final int opc_fsub = 102;
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public static final int opc_dsub = 103;
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public static final int opc_imul = 104;
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public static final int opc_lmul = 105;
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public static final int opc_fmul = 106;
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public static final int opc_dmul = 107;
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public static final int opc_idiv = 108;
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public static final int opc_ldiv = 109;
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public static final int opc_fdiv = 110;
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public static final int opc_ddiv = 111;
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public static final int opc_irem = 112;
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public static final int opc_lrem = 113;
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public static final int opc_frem = 114;
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public static final int opc_drem = 115;
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public static final int opc_ineg = 116;
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public static final int opc_lneg = 117;
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public static final int opc_fneg = 118;
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public static final int opc_dneg = 119;
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public static final int opc_ishl = 120;
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public static final int opc_lshl = 121;
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public static final int opc_ishr = 122;
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public static final int opc_lshr = 123;
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public static final int opc_iushr = 124;
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public static final int opc_lushr = 125;
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public static final int opc_iand = 126;
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public static final int opc_land = 127;
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public static final int opc_ior = 128;
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public static final int opc_lor = 129;
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public static final int opc_ixor = 130;
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public static final int opc_lxor = 131;
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public static final int opc_iinc = 132;
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public static final int opc_i2l = 133;
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public static final int opc_i2f = 134;
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public static final int opc_i2d = 135;
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public static final int opc_l2i = 136;
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public static final int opc_l2f = 137;
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public static final int opc_l2d = 138;
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public static final int opc_f2i = 139;
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public static final int opc_f2l = 140;
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public static final int opc_f2d = 141;
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public static final int opc_d2i = 142;
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public static final int opc_d2l = 143;
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public static final int opc_d2f = 144;
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public static final int opc_i2b = 145;
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public static final int opc_i2c = 146;
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public static final int opc_i2s = 147;
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public static final int opc_lcmp = 148;
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public static final int opc_fcmpl = 149;
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public static final int opc_fcmpg = 150;
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public static final int opc_dcmpl = 151;
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public static final int opc_dcmpg = 152;
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public static final int opc_ifeq = 153;
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public static final int opc_ifne = 154;
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public static final int opc_iflt = 155;
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public static final int opc_ifge = 156;
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public static final int opc_ifgt = 157;
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public static final int opc_ifle = 158;
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public static final int opc_if_icmpeq = 159;
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public static final int opc_if_icmpne = 160;
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public static final int opc_if_icmplt = 161;
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public static final int opc_if_icmpge = 162;
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public static final int opc_if_icmpgt = 163;
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public static final int opc_if_icmple = 164;
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public static final int opc_if_acmpeq = 165;
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public static final int opc_if_acmpne = 166;
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public static final int opc_goto = 167;
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public static final int opc_jsr = 168;
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public static final int opc_ret = 169;
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public static final int opc_tableswitch = 170;
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public static final int opc_lookupswitch = 171;
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public static final int opc_ireturn = 172;
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public static final int opc_lreturn = 173;
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public static final int opc_freturn = 174;
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public static final int opc_dreturn = 175;
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public static final int opc_areturn = 176;
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public static final int opc_return = 177;
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public static final int opc_getstatic = 178;
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public static final int opc_putstatic = 179;
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public static final int opc_getfield = 180;
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public static final int opc_putfield = 181;
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public static final int opc_invokevirtual = 182;
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public static final int opc_invokespecial = 183;
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public static final int opc_invokestatic = 184;
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public static final int opc_invokeinterface = 185;
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public static final int opc_xxxunusedxxx = 186;
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public static final int opc_new = 187;
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public static final int opc_newarray = 188;
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public static final int opc_anewarray = 189;
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public static final int opc_arraylength = 190;
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public static final int opc_athrow = 191;
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public static final int opc_checkcast = 192;
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public static final int opc_instanceof = 193;
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public static final int opc_monitorenter = 194;
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public static final int opc_monitorexit = 195;
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public static final int opc_wide = 196;
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public static final int opc_multianewarray = 197;
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public static final int opc_ifnull = 198;
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public static final int opc_ifnonnull = 199;
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public static final int opc_goto_w = 200;
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public static final int opc_jsr_w = 201;
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public static final int opc_breakpoint = 202;
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public static FlowBlock createNormal(CodeAnalyzer ca,
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int addr, int length,
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Instruction instr)
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{
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return new FlowBlock(ca, addr, length,
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new InstructionBlock(instr,
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new Jump(addr+length)));
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}
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public static FlowBlock createGoto(CodeAnalyzer ca,
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int addr, int length,
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int destAddr)
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{
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return new FlowBlock(ca, addr, length,
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new EmptyBlock(new Jump(destAddr)));
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}
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public static FlowBlock createJsr(CodeAnalyzer ca,
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int addr, int length,
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int destAddr)
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{
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return new FlowBlock(ca, addr, length,
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new JsrBlock(new Jump(addr+length),
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new Jump(destAddr)));
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}
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public static FlowBlock createIfGoto(CodeAnalyzer ca,
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int addr, int length,
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int destAddr, Instruction instr)
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{
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ConditionalBlock ifBlock =
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new ConditionalBlock(instr,
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new Jump(destAddr),
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new Jump(addr+length));
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return new FlowBlock(ca, addr, length, ifBlock);
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}
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public static FlowBlock createSwitch(CodeAnalyzer ca,
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int addr, int length,
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int[] cases, int[] dests)
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{
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return new FlowBlock(ca, addr, length,
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new SwitchBlock(new NopOperator(Type.tInt),
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cases, dests));
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}
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public static FlowBlock createBlock(CodeAnalyzer ca,
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int addr, int length,
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StructuredBlock block)
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{
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return new FlowBlock(ca, addr, length, block);
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}
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public static FlowBlock createRet(CodeAnalyzer ca,
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int addr, int length,
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LocalInfo local)
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{
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return new FlowBlock(ca, addr, length,
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new RetBlock(local));
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}
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/**
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* Read an opcode out of a data input stream containing the bytecode.
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* @param addr The current address.
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* @param stream The stream containing the java byte code.
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* @param ca The Code Analyzer
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* (where further information can be get from).
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* @return The FlowBlock representing this opcode
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* or null if the stream is empty.
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* @exception IOException if an read error occured.
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* @exception ClassFormatError if an invalid opcode is detected.
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*/
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public static FlowBlock readOpcode(int addr, DataInputStream stream,
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CodeAnalyzer ca)
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throws IOException, ClassFormatError
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{
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try {
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int opcode = stream.readUnsignedByte();
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switch (opcode) {
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case opc_nop:
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return createNormal(ca, addr, 1, new NopOperator());
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case opc_aconst_null:
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return createNormal
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(ca, addr, 1, new ConstOperator(OBJECT_TYPE, "null"));
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case opc_iconst_0: case opc_iconst_1:
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return createNormal
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(ca, addr, 1, new ConstOperator
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(Type.tBoolInt, Integer.toString(opcode - opc_iconst_0)));
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case opc_iconst_m1: case opc_iconst_2:
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case opc_iconst_3: case opc_iconst_4: case opc_iconst_5:
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return createNormal
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(ca, addr, 1, new ConstOperator
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(ALL_INT_TYPE, Integer.toString(opcode - opc_iconst_0)));
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case opc_lconst_0: case opc_lconst_1:
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return createNormal
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(ca, addr, 1, new ConstOperator
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(LONG_TYPE,
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Integer.toString(opcode - opc_lconst_0) + "L"));
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case opc_fconst_0: case opc_fconst_1: case opc_fconst_2:
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return createNormal
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(ca, addr, 1, new ConstOperator
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(FLOAT_TYPE,
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Integer.toString(opcode - opc_fconst_0) + ".0F"));
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case opc_dconst_0: case opc_dconst_1:
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return createNormal
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(ca, addr, 1, new ConstOperator
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(DOUBLE_TYPE,
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Integer.toString(opcode - opc_dconst_0) + ".0"));
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case opc_bipush:
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return createNormal
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(ca, addr, 2, new ConstOperator
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(ALL_INT_TYPE, Integer.toString(stream.readByte())));
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case opc_sipush:
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return createNormal
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(ca, addr, 3, new ConstOperator
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(Type.tRange(Type.tInt, Type.tShort),
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Integer.toString(stream.readShort())));
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case opc_ldc: {
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int index = stream.readUnsignedByte();
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return createNormal
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(ca, addr, 2, new ConstOperator
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(ca.method.classAnalyzer.getConstantType(index),
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ca.method.classAnalyzer.getConstantString(index)));
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}
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case opc_ldc_w:
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case opc_ldc2_w: {
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int index = stream.readUnsignedShort();
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return createNormal
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(ca, addr, 3, new ConstOperator
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(ca.method.classAnalyzer.getConstantType(index),
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ca.method.classAnalyzer.getConstantString(index)));
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}
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case opc_iload: case opc_lload:
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case opc_fload: case opc_dload: case opc_aload:
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return createNormal
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(ca, addr, 2, new LocalLoadOperator
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(types[0][opcode-opc_iload],
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ca.getLocalInfo(addr, stream.readUnsignedByte())));
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case opc_iload_0: case opc_iload_1: case opc_iload_2: case opc_iload_3:
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case opc_lload_0: case opc_lload_1: case opc_lload_2: case opc_lload_3:
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case opc_fload_0: case opc_fload_1: case opc_fload_2: case opc_fload_3:
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case opc_dload_0: case opc_dload_1: case opc_dload_2: case opc_dload_3:
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case opc_aload_0: case opc_aload_1: case opc_aload_2: case opc_aload_3:
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return createNormal
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(ca, addr, 1, new LocalLoadOperator
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(types[0][(opcode-opc_iload_0)/4],
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ca.getLocalInfo(addr, (opcode-opc_iload_0) & 3)));
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case opc_iaload: case opc_laload:
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case opc_faload: case opc_daload: case opc_aaload:
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case opc_baload: case opc_caload: case opc_saload:
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return createNormal
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(ca, addr, 1, new ArrayLoadOperator
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(types[1][opcode - opc_iaload]));
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case opc_istore: case opc_lstore:
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case opc_fstore: case opc_dstore: case opc_astore:
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return createNormal
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(ca, addr, 2, new LocalStoreOperator
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(types[0][opcode-opc_istore],
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ca.getLocalInfo(addr+2, stream.readUnsignedByte()),
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Operator.ASSIGN_OP));
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case opc_istore_0: case opc_istore_1:
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case opc_istore_2: case opc_istore_3:
|
|
case opc_lstore_0: case opc_lstore_1:
|
|
case opc_lstore_2: case opc_lstore_3:
|
|
case opc_fstore_0: case opc_fstore_1:
|
|
case opc_fstore_2: case opc_fstore_3:
|
|
case opc_dstore_0: case opc_dstore_1:
|
|
case opc_dstore_2: case opc_dstore_3:
|
|
case opc_astore_0: case opc_astore_1:
|
|
case opc_astore_2: case opc_astore_3:
|
|
return createNormal
|
|
(ca, addr, 1, new LocalStoreOperator
|
|
(types[0][(opcode-opc_istore_0)/4],
|
|
ca.getLocalInfo(addr+1, (opcode-opc_istore_0) & 3),
|
|
Operator.ASSIGN_OP));
|
|
case opc_iastore: case opc_lastore:
|
|
case opc_fastore: case opc_dastore: case opc_aastore:
|
|
case opc_bastore: case opc_castore: case opc_sastore:
|
|
return createNormal
|
|
(ca, addr, 1, new ArrayStoreOperator
|
|
(types[1][opcode - opc_iastore]));
|
|
case opc_pop: case opc_pop2:
|
|
return createNormal
|
|
(ca, addr, 1, new PopOperator(opcode - opc_pop + 1));
|
|
case opc_dup: case opc_dup_x1: case opc_dup_x2:
|
|
case opc_dup2: case opc_dup2_x1: case opc_dup2_x2:
|
|
return createNormal
|
|
(ca, addr, 1, new DupOperator
|
|
((opcode - opc_dup)%3, (opcode - opc_dup)/3+1));
|
|
case opc_swap:
|
|
return createNormal(ca, addr, 1, new SwapOperator());
|
|
case opc_iadd: case opc_ladd: case opc_fadd: case opc_dadd:
|
|
case opc_isub: case opc_lsub: case opc_fsub: case opc_dsub:
|
|
case opc_imul: case opc_lmul: case opc_fmul: case opc_dmul:
|
|
case opc_idiv: case opc_ldiv: case opc_fdiv: case opc_ddiv:
|
|
case opc_irem: case opc_lrem: case opc_frem: case opc_drem:
|
|
return createNormal
|
|
(ca, addr, 1, new BinaryOperator
|
|
(types[3][(opcode - opc_iadd)%4],
|
|
(opcode - opc_iadd)/4+Operator.ADD_OP));
|
|
case opc_ineg: case opc_lneg: case opc_fneg: case opc_dneg:
|
|
return createNormal
|
|
(ca, addr, 1, new UnaryOperator
|
|
(types[3][opcode - opc_ineg], Operator.NEG_OP));
|
|
case opc_ishl: case opc_lshl:
|
|
case opc_ishr: case opc_lshr:
|
|
case opc_iushr: case opc_lushr:
|
|
return createNormal
|
|
(ca, addr, 1, new ShiftOperator
|
|
(types[3][(opcode - opc_ishl)%2],
|
|
(opcode - opc_ishl)/2 + Operator.SHIFT_OP));
|
|
case opc_iand: case opc_land:
|
|
case opc_ior : case opc_lor :
|
|
case opc_ixor: case opc_lxor:
|
|
return createNormal
|
|
(ca, addr, 1, new BinaryOperator
|
|
(types[0][(opcode - opc_iand)%2],
|
|
(opcode - opc_iand)/2 + Operator.AND_OP));
|
|
case opc_iinc: {
|
|
int local = stream.readUnsignedByte();
|
|
int value = stream.readByte();
|
|
int operation = Operator.ADD_OP;
|
|
if (value < 0) {
|
|
value = -value;
|
|
operation = Operator.NEG_OP;
|
|
}
|
|
LocalInfo li = ca.getLocalInfo(addr, local);
|
|
li.setType(ALL_INT_TYPE);
|
|
return createNormal
|
|
(ca, addr, 3, new IIncOperator
|
|
(li, Integer.toString(value),
|
|
operation + Operator.OPASSIGN_OP));
|
|
}
|
|
case opc_i2l: case opc_i2f: case opc_i2d:
|
|
case opc_l2i: case opc_l2f: case opc_l2d:
|
|
case opc_f2i: case opc_f2l: case opc_f2d:
|
|
case opc_d2i: case opc_d2l: case opc_d2f: {
|
|
int from = (opcode-opc_i2l)/3;
|
|
int to = (opcode-opc_i2l)%3;
|
|
if (to >= from)
|
|
to++;
|
|
return createNormal
|
|
(ca, addr, 1, new ConvertOperator(types[3][from],
|
|
types[3][to]));
|
|
}
|
|
case opc_i2b: case opc_i2c: case opc_i2s:
|
|
return createNormal
|
|
(ca, addr, 1, new ConvertOperator
|
|
(ALL_INT_TYPE, types[2][opcode-opc_i2b]));
|
|
case opc_lcmp:
|
|
case opc_fcmpl: case opc_fcmpg:
|
|
case opc_dcmpl: case opc_dcmpg:
|
|
return createNormal
|
|
(ca, addr, 1, new CompareToIntOperator
|
|
(types[3][(opcode-opc_lcmp+3)/2], (opcode-opc_lcmp+3)%2));
|
|
case opc_ifeq: case opc_ifne:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareUnaryOperator
|
|
(BOOL_INT_TYPE, opcode - opc_ifeq+Operator.COMPARE_OP));
|
|
case opc_iflt: case opc_ifge: case opc_ifgt: case opc_ifle:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareUnaryOperator
|
|
(ALL_INT_TYPE, opcode - opc_ifeq+Operator.COMPARE_OP));
|
|
case opc_if_icmpeq: case opc_if_icmpne:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareBinaryOperator
|
|
(Type.tBoolInt,
|
|
opcode - opc_if_icmpeq+Operator.COMPARE_OP));
|
|
case opc_if_icmplt: case opc_if_icmpge:
|
|
case opc_if_icmpgt: case opc_if_icmple:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareBinaryOperator
|
|
(ALL_INT_TYPE,
|
|
opcode - opc_if_icmpeq+Operator.COMPARE_OP));
|
|
case opc_if_acmpeq: case opc_if_acmpne:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareBinaryOperator
|
|
(OBJECT_TYPE,
|
|
opcode - opc_if_acmpeq+Operator.COMPARE_OP));
|
|
case opc_goto:
|
|
return createGoto
|
|
(ca, addr, 3, addr+stream.readShort());
|
|
case opc_jsr:
|
|
return createJsr
|
|
(ca, addr, 3, addr+stream.readShort());
|
|
case opc_ret:
|
|
return createRet
|
|
(ca, addr, 2,
|
|
ca.getLocalInfo(addr, stream.readUnsignedByte()));
|
|
case opc_tableswitch: {
|
|
int length = 3-(addr % 4);
|
|
stream.skip(length);
|
|
int def = addr + stream.readInt();
|
|
int low = stream.readInt();
|
|
int high = stream.readInt();
|
|
int[] cases = new int[high-low+1];
|
|
int[] dests = new int[high-low+2];
|
|
for (int i=0; i+low <= high; i++) {
|
|
cases[i] = i+low;
|
|
dests[i] = addr + stream.readInt();
|
|
}
|
|
dests[cases.length] = def;
|
|
length += 13 + 4 * cases.length;
|
|
return createSwitch
|
|
(ca, addr, length, cases, dests);
|
|
}
|
|
case opc_lookupswitch: {
|
|
int length = 3-(addr % 4);
|
|
stream.skip(length);
|
|
int def = addr + stream.readInt();
|
|
int npairs = stream.readInt();
|
|
int[] cases = new int[npairs];
|
|
int[] dests = new int[npairs+1];
|
|
for (int i=0; i < npairs; i++) {
|
|
cases[i] = stream.readInt();
|
|
dests[i] = addr + stream.readInt();
|
|
}
|
|
dests[npairs] = def;
|
|
length += 9 + 8 * npairs;
|
|
return createSwitch
|
|
(ca, addr, length, cases, dests);
|
|
}
|
|
case opc_ireturn: case opc_lreturn:
|
|
case opc_freturn: case opc_dreturn: case opc_areturn: {
|
|
Type retType = ca.getMethod().getReturnType();
|
|
return createBlock
|
|
(ca, addr, 1, new ReturnBlock(new NopOperator(retType)));
|
|
}
|
|
case opc_return:
|
|
/* Address -1 is interpreted as end of method */
|
|
return createBlock
|
|
(ca, addr, 1, new EmptyBlock(new Jump(-1)));
|
|
case opc_getstatic:
|
|
case opc_getfield:
|
|
return createNormal
|
|
(ca, addr, 3, new GetFieldOperator
|
|
(ca, opcode == opc_getstatic,
|
|
(CpoolRef)ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort())));
|
|
case opc_putstatic:
|
|
case opc_putfield:
|
|
return createNormal
|
|
(ca, addr, 3, new PutFieldOperator
|
|
(ca, opcode == opc_putstatic,
|
|
(CpoolRef)ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort())));
|
|
case opc_invokevirtual:
|
|
case opc_invokespecial:
|
|
case opc_invokestatic :
|
|
return createNormal
|
|
(ca, addr, 3, new InvokeOperator
|
|
(ca,
|
|
opcode == opc_invokestatic, opcode == opc_invokespecial,
|
|
(CpoolRef)ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort())));
|
|
case opc_invokeinterface: {
|
|
FlowBlock fb = createNormal
|
|
(ca, addr, 5, new InvokeOperator
|
|
(ca, false, false,
|
|
(CpoolRef)ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort())));
|
|
int reserved = stream.readUnsignedShort();
|
|
return fb;
|
|
}
|
|
case opc_new: {
|
|
CpoolClass cpcls = (CpoolClass)
|
|
ca.method.classAnalyzer.getConstant(stream.readUnsignedShort());
|
|
Type type = Type.tClassOrArray(cpcls.getName().getString());
|
|
return createNormal
|
|
(ca, addr, 3, new NewOperator(type, type.toString()));
|
|
}
|
|
case opc_newarray: {
|
|
Type type;
|
|
switch (stream.readUnsignedByte()) {
|
|
case 4: type = Type.tBoolean; break;
|
|
case 5: type = Type.tChar ; break;
|
|
case 6: type = Type.tFloat ; break;
|
|
case 7: type = Type.tDouble ; break;
|
|
case 8: type = Type.tByte ; break;
|
|
case 9: type = Type.tShort ; break;
|
|
case 10: type = Type.tInt ; break;
|
|
case 11: type = Type.tLong ; break;
|
|
default:
|
|
throw new ClassFormatError("Invalid newarray operand");
|
|
}
|
|
return createNormal
|
|
(ca, addr, 2, new NewArrayOperator(Type.tArray(type), 1));
|
|
}
|
|
case opc_anewarray: {
|
|
CpoolClass cpcls = (CpoolClass)
|
|
ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort());
|
|
Type type = Type.tClassOrArray(cpcls.getName().getString());
|
|
return createNormal
|
|
(ca, addr, 3, new NewArrayOperator(Type.tArray(type), 1));
|
|
}
|
|
case opc_arraylength:
|
|
return createNormal
|
|
(ca, addr, 1, new ArrayLengthOperator());
|
|
case opc_athrow:
|
|
return createBlock
|
|
(ca, addr, 1,
|
|
new ThrowBlock(new NopOperator(Type.tUObject)));
|
|
case opc_checkcast: {
|
|
CpoolClass cpcls = (CpoolClass)
|
|
ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort());
|
|
Type type = Type.tClassOrArray(cpcls.getName().getString());
|
|
return createNormal
|
|
(ca, addr, 3, new CheckCastOperator
|
|
(type, type.toString()));
|
|
}
|
|
case opc_instanceof: {
|
|
CpoolClass cpcls = (CpoolClass)
|
|
ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort());
|
|
Type type = Type.tClassOrArray(cpcls.getName().getString());
|
|
return createNormal
|
|
(ca, addr, 3,
|
|
new InstanceOfOperator(type, type.toString()));
|
|
}
|
|
case opc_monitorenter:
|
|
return createNormal(ca, addr, 1,
|
|
new MonitorEnterOperator());
|
|
case opc_monitorexit:
|
|
return createNormal(ca, addr, 1,
|
|
new MonitorExitOperator());
|
|
case opc_wide: {
|
|
switch (opcode=stream.readUnsignedByte()) {
|
|
case opc_iload: case opc_lload:
|
|
case opc_fload: case opc_dload: case opc_aload:
|
|
return createNormal
|
|
(ca, addr, 4,
|
|
new LocalLoadOperator
|
|
(types[0][opcode-opc_iload],
|
|
ca.getLocalInfo(addr, stream.readUnsignedShort())));
|
|
case opc_istore: case opc_lstore:
|
|
case opc_fstore: case opc_dstore: case opc_astore:
|
|
return createNormal
|
|
(ca, addr, 4,
|
|
new LocalStoreOperator
|
|
(types[0][opcode-opc_istore],
|
|
ca.getLocalInfo(addr+4, stream.readUnsignedShort()),
|
|
Operator.ASSIGN_OP));
|
|
case opc_iinc: {
|
|
int local = stream.readUnsignedShort();
|
|
int value = stream.readShort();
|
|
int operation = Operator.ADD_OP;
|
|
if (value < 0) {
|
|
value = -value;
|
|
operation = Operator.NEG_OP;
|
|
}
|
|
LocalInfo li = ca.getLocalInfo(addr, local);
|
|
li.setType(ALL_INT_TYPE);
|
|
return createNormal
|
|
(ca, addr, 6, new IIncOperator
|
|
(li, Integer.toString(value),
|
|
operation + Operator.OPASSIGN_OP));
|
|
}
|
|
case opc_ret:
|
|
return createRet
|
|
(ca, addr, 4,
|
|
ca.getLocalInfo(addr, stream.readUnsignedShort()));
|
|
default:
|
|
throw new ClassFormatError("Invalid wide opcode "+opcode);
|
|
}
|
|
}
|
|
case opc_multianewarray: {
|
|
CpoolClass cpcls = (CpoolClass)
|
|
ca.method.classAnalyzer.getConstant
|
|
(stream.readUnsignedShort());
|
|
Type type = Type.tClassOrArray(cpcls.getName().getString());
|
|
int dimension = stream.readUnsignedByte();
|
|
return createNormal
|
|
(ca, addr, 4,
|
|
new NewArrayOperator(type, dimension));
|
|
}
|
|
case opc_ifnull: case opc_ifnonnull:
|
|
return createIfGoto
|
|
(ca, addr, 3, addr+stream.readShort(),
|
|
new CompareUnaryOperator
|
|
(OBJECT_TYPE, opcode - opc_ifnull+Operator.COMPARE_OP));
|
|
case opc_goto_w:
|
|
return createGoto
|
|
(ca, addr, 5, addr + stream.readInt());
|
|
case opc_jsr_w:
|
|
return createJsr
|
|
(ca, addr, 5, addr+stream.readInt());
|
|
default:
|
|
throw new ClassFormatError("Invalid opcode "+opcode);
|
|
}
|
|
} catch (ClassCastException ex) {
|
|
ex.printStackTrace();
|
|
throw new ClassFormatError("Constant has wrong type");
|
|
}
|
|
}
|
|
}
|
|
|