internal TableSwitchData(BranchOffset defaultByte, int lowByte, int highByte, BranchOffset[] offsets)
{
this.defaultByte = defaultByte;
LowByte = lowByte;
HighByte = highByte;
this.offsets = offsets;
}
internal TableSwitchData(BranchOffset defaultByte, int lowByte, int highByte, BranchOffset[] offsets)
{
this.defaultByte = defaultByte;
LowByte = lowByte;
HighByte = highByte;
this.offsets = offsets;
}
/// <summary>
/// Read a TABLESWITCH payload
/// </summary>
private TableSwitchData ReadTableSwitch(ref int offset)
{
while ((offset % 4) != 0)
{
offset++;
}
var defByte = new BranchOffset(ReadS32(ref offset));
var lowByte = ReadS32(ref offset);
var highByte = ReadS32(ref offset);
var offsets = new BranchOffset[highByte - lowByte + 1];
for (var i = 0; i < offsets.Length; i++)
{
offsets[i] = new BranchOffset(ReadS32(ref offset));
}
return(new TableSwitchData(defByte, lowByte, highByte, offsets));
}
/// <summary>
/// Read a LOOKUPSWITCH payload
/// </summary>
private LookupSwitchData ReadLookupSwitch(ref int offset)
{
while ((offset % 4) != 0)
{
offset++;
}
var defByte = new BranchOffset(ReadS32(ref offset));
var npairs = ReadS32(ref offset);
var pairs = new List <LookupSwitchData.Pair>();
for (var i = 0; i < npairs; i++)
{
var match = ReadS32(ref offset);
var _offset = new BranchOffset(ReadS32(ref offset));
pairs.Add(new LookupSwitchData.Pair(match, _offset));
}
return(new LookupSwitchData(defByte, pairs.ToArray()));
}
/// <summary>
/// Parse the entire byte array into instructions.
/// </summary>
private List <Instruction> Parse()
{
var instructions = new List <Instruction>();
for (var offset = 0; offset < code.Length;)
{
var startOffset = offset;
var opcode = (Code)code[offset++];
object operand = null;
object operand2 = null;
switch (opcode)
{
case Code.AALOAD:
case Code.AASTORE:
case Code.ACONST_NULL:
case Code.ARETURN:
case Code.ARRAYLENGTH:
case Code.ATHROW:
case Code.BALOAD:
case Code.BASTORE:
case Code.CALOAD:
case Code.CASTORE:
case Code.D2F:
case Code.D2I:
case Code.D2L:
case Code.DADD:
case Code.DALOAD:
case Code.DASTORE:
case Code.DCMPG:
case Code.DCMPL:
case Code.DDIV:
case Code.DMUL:
case Code.DNEG:
case Code.DREM:
case Code.DRETURN:
case Code.DSUB:
case Code.DUP:
case Code.DUP_X1:
case Code.DUP_X2:
case Code.DUP2:
case Code.DUP2_X1:
case Code.DUP2_X2:
case Code.F2D:
case Code.F2I:
case Code.F2L:
case Code.FADD:
case Code.FALOAD:
case Code.FASTORE:
case Code.FCMPG:
case Code.FCMPL:
case Code.FDIV:
case Code.FMUL:
case Code.FNEG:
case Code.FREM:
case Code.FRETURN:
case Code.FSUB:
case Code.I2B:
case Code.I2C:
case Code.I2D:
case Code.I2F:
case Code.I2L:
case Code.I2S:
case Code.IADD:
case Code.IALOAD:
case Code.IAND:
case Code.IASTORE:
case Code.IDIV:
case Code.IMUL:
case Code.INEG:
case Code.IOR:
case Code.IREM:
case Code.IRETURN:
case Code.ISHL:
case Code.ISHR:
case Code.ISUB:
case Code.IUSHR:
case Code.IXOR:
case Code.L2D:
case Code.L2F:
case Code.L2I:
case Code.LADD:
case Code.LALOAD:
case Code.LAND:
case Code.LASTORE:
case Code.LCMP:
case Code.LDIV:
case Code.LMUL:
case Code.LNEG:
case Code.LOR:
case Code.LREM:
case Code.LRETURN:
case Code.LSHL:
case Code.LSHR:
case Code.LSUB:
case Code.LUSHR:
case Code.LXOR:
case Code.MONITORENTER:
case Code.MONITOREXIT:
case Code.NOP:
case Code.POP:
case Code.POP2:
case Code.RETURN:
case Code.SALOAD:
case Code.SASTORE:
case Code.SWAP:
// Single byte
break;
case Code.ALOAD:
case Code.ASTORE:
case Code.DLOAD:
case Code.DSTORE:
case Code.FLOAD:
case Code.FSTORE:
case Code.ILOAD:
case Code.ISTORE:
case Code.LLOAD:
case Code.LSTORE:
// Single U8 operand
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
break;
case Code.ALOAD_0:
case Code.ALOAD_1:
case Code.ALOAD_2:
case Code.ALOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.ALOAD_0);
break;
case Code.ANEWARRAY:
case Code.CHECKCAST:
case Code.INSTANCEOF:
case Code.NEW:
// U16 class reference
operand = cp.GetEntry <ConstantPoolClass>(ReadU16(ref offset));
break;
case Code.ASTORE_0:
case Code.ASTORE_1:
case Code.ASTORE_2:
case Code.ASTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.ASTORE_0);
break;
case Code.BIPUSH:
operand = ReadS8(ref offset);
break;
case Code.DCONST_0:
operand = 0.0;
break;
case Code.DCONST_1:
operand = 1.0;
break;
case Code.DLOAD_0:
case Code.DLOAD_1:
case Code.DLOAD_2:
case Code.DLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.DLOAD_0);
break;
case Code.DSTORE_0:
case Code.DSTORE_1:
case Code.DSTORE_2:
case Code.DSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.DSTORE_0);
break;
case Code.FCONST_0:
operand = 0.0f;
break;
case Code.FCONST_1:
operand = 1.0f;
break;
case Code.FCONST_2:
operand = 2.0f;
break;
case Code.FLOAD_0:
case Code.FLOAD_1:
case Code.FLOAD_2:
case Code.FLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.FLOAD_0);
break;
case Code.FSTORE_0:
case Code.FSTORE_1:
case Code.FSTORE_2:
case Code.FSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.FSTORE_0);
break;
case Code.GETFIELD:
case Code.GETSTATIC:
case Code.PUTFIELD:
case Code.PUTSTATIC:
// U16 field reference
operand = cp.GetEntry <ConstantPoolFieldRef>(ReadU16(ref offset));
break;
case Code.GOTO:
case Code.IF_ACMPEQ:
case Code.IF_ACMPNE:
case Code.IF_ICMPEQ:
case Code.IF_ICMPNE:
case Code.IF_ICMPLT:
case Code.IF_ICMPGE:
case Code.IF_ICMPGT:
case Code.IF_ICMPLE:
case Code.IFEQ:
case Code.IFNE:
case Code.IFLT:
case Code.IFGE:
case Code.IFGT:
case Code.IFLE:
case Code.IFNONNULL:
case Code.IFNULL:
case Code.JSR:
operand = new BranchOffset(ReadS16(ref offset));
break;
case Code.GOTO_W:
case Code.JSR_W:
operand = new BranchOffset(ReadS32(ref offset));
break;
case Code.ICONST_M1:
case Code.ICONST_0:
case Code.ICONST_1:
case Code.ICONST_2:
case Code.ICONST_3:
case Code.ICONST_4:
case Code.ICONST_5:
operand = (int)(opcode - Code.ICONST_0);
break;
case Code.IINC:
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
operand2 = ReadS8(ref offset);
break;
case Code.ILOAD_0:
case Code.ILOAD_1:
case Code.ILOAD_2:
case Code.ILOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.ILOAD_0);
break;
case Code.INVOKEINTERFACE:
// U16 method/imethod reference
operand = cp[ReadU16(ref offset)];
operand2 = ReadU8(ref offset);
offset++; // '0'
break;
case Code.INVOKESPECIAL:
case Code.INVOKESTATIC:
case Code.INVOKEVIRTUAL:
// U16 method/imethod reference
operand = cp[ReadU16(ref offset)];
break;
case Code.ISTORE_0:
case Code.ISTORE_1:
case Code.ISTORE_2:
case Code.ISTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.ISTORE_0);
break;
case Code.LCONST_0:
operand = 0L;
break;
case Code.LCONST_1:
operand = 1L;
break;
case Code.LDC:
operand = cp[ReadU8(ref offset)];
break;
case Code.LDC_W:
case Code.LDC2_W:
operand = cp[ReadU16(ref offset)];
break;
case Code.LLOAD_0:
case Code.LLOAD_1:
case Code.LLOAD_2:
case Code.LLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.LLOAD_0);
break;
case Code.LOOKUPSWITCH:
operand = ReadLookupSwitch(ref offset);
break;
case Code.LSTORE_0:
case Code.LSTORE_1:
case Code.LSTORE_2:
case Code.LSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.LSTORE_0);
break;
case Code.MULTIANEWARRAY:
operand = cp.GetEntry <ConstantPoolClass>(ReadU16(ref offset));
operand2 = ReadU8(ref offset);
break;
case Code.NEWARRAY:
operand = ReadU8(ref offset);
break;
case Code.RET:
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
break;
case Code.SIPUSH:
operand = ReadS16(ref offset);
break;
case Code.TABLESWITCH:
operand = ReadTableSwitch(ref offset);
break;
case Code.WIDE:
opcode = (Code)code[offset++];
operand = GetLocalVariable(startOffset, ReadU16(ref offset));
if (opcode == Code.IINC)
{
operand2 = ReadS16(ref offset);
}
break;
}
instructions.Add(new Instruction(startOffset, opcode, operand, operand2));
}
return(instructions);
}
internal Pair(int match, BranchOffset offset)
{
Match = match;
this.offset = offset;
}
internal LookupSwitchData(BranchOffset defaultByte, Pair[] pairs)
{
this.defaultByte = defaultByte;
Pairs = pairs;
}
/// <summary>
/// Parse the entire byte array into instructions.
/// </summary>
private List<Instruction> Parse()
{
var instructions = new List<Instruction>();
for (var offset = 0; offset < code.Length; )
{
var startOffset = offset;
var opcode = (Code) code[offset++];
object operand = null;
object operand2 = null;
switch (opcode)
{
case Code.AALOAD:
case Code.AASTORE:
case Code.ACONST_NULL:
case Code.ARETURN:
case Code.ARRAYLENGTH:
case Code.ATHROW:
case Code.BALOAD:
case Code.BASTORE:
case Code.CALOAD:
case Code.CASTORE:
case Code.D2F:
case Code.D2I:
case Code.D2L:
case Code.DADD:
case Code.DALOAD:
case Code.DASTORE:
case Code.DCMPG:
case Code.DCMPL:
case Code.DDIV:
case Code.DMUL:
case Code.DNEG:
case Code.DREM:
case Code.DRETURN:
case Code.DSUB:
case Code.DUP:
case Code.DUP_X1:
case Code.DUP_X2:
case Code.DUP2:
case Code.DUP2_X1:
case Code.DUP2_X2:
case Code.F2D:
case Code.F2I:
case Code.F2L:
case Code.FADD:
case Code.FALOAD:
case Code.FASTORE:
case Code.FCMPG:
case Code.FCMPL:
case Code.FDIV:
case Code.FMUL:
case Code.FNEG:
case Code.FREM:
case Code.FRETURN:
case Code.FSUB:
case Code.I2B:
case Code.I2C:
case Code.I2D:
case Code.I2F:
case Code.I2L:
case Code.I2S:
case Code.IADD:
case Code.IALOAD:
case Code.IAND:
case Code.IASTORE:
case Code.IDIV:
case Code.IMUL:
case Code.INEG:
case Code.IOR:
case Code.IREM:
case Code.IRETURN:
case Code.ISHL:
case Code.ISHR:
case Code.ISUB:
case Code.IUSHR:
case Code.IXOR:
case Code.L2D:
case Code.L2F:
case Code.L2I:
case Code.LADD:
case Code.LALOAD:
case Code.LAND:
case Code.LASTORE:
case Code.LCMP:
case Code.LDIV:
case Code.LMUL:
case Code.LNEG:
case Code.LOR:
case Code.LREM:
case Code.LRETURN:
case Code.LSHL:
case Code.LSHR:
case Code.LSUB:
case Code.LUSHR:
case Code.LXOR:
case Code.MONITORENTER:
case Code.MONITOREXIT:
case Code.NOP:
case Code.POP:
case Code.POP2:
case Code.RETURN:
case Code.SALOAD:
case Code.SASTORE:
case Code.SWAP:
// Single byte
break;
case Code.ALOAD:
case Code.ASTORE:
case Code.DLOAD:
case Code.DSTORE:
case Code.FLOAD:
case Code.FSTORE:
case Code.ILOAD:
case Code.ISTORE:
case Code.LLOAD:
case Code.LSTORE:
// Single U8 operand
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
break;
case Code.ALOAD_0:
case Code.ALOAD_1:
case Code.ALOAD_2:
case Code.ALOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.ALOAD_0);
break;
case Code.ANEWARRAY:
case Code.CHECKCAST:
case Code.INSTANCEOF:
case Code.NEW:
// U16 class reference
operand = cp.GetEntry<ConstantPoolClass>(ReadU16(ref offset));
break;
case Code.ASTORE_0:
case Code.ASTORE_1:
case Code.ASTORE_2:
case Code.ASTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.ASTORE_0);
break;
case Code.BIPUSH:
operand = ReadS8(ref offset);
break;
case Code.DCONST_0:
operand = 0.0;
break;
case Code.DCONST_1:
operand = 1.0;
break;
case Code.DLOAD_0:
case Code.DLOAD_1:
case Code.DLOAD_2:
case Code.DLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.DLOAD_0);
break;
case Code.DSTORE_0:
case Code.DSTORE_1:
case Code.DSTORE_2:
case Code.DSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.DSTORE_0);
break;
case Code.FCONST_0:
operand = 0.0f;
break;
case Code.FCONST_1:
operand = 1.0f;
break;
case Code.FCONST_2:
operand = 2.0f;
break;
case Code.FLOAD_0:
case Code.FLOAD_1:
case Code.FLOAD_2:
case Code.FLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.FLOAD_0);
break;
case Code.FSTORE_0:
case Code.FSTORE_1:
case Code.FSTORE_2:
case Code.FSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.FSTORE_0);
break;
case Code.GETFIELD:
case Code.GETSTATIC:
case Code.PUTFIELD:
case Code.PUTSTATIC:
// U16 field reference
operand = cp.GetEntry<ConstantPoolFieldRef>(ReadU16(ref offset));
break;
case Code.GOTO:
case Code.IF_ACMPEQ:
case Code.IF_ACMPNE:
case Code.IF_ICMPEQ:
case Code.IF_ICMPNE:
case Code.IF_ICMPLT:
case Code.IF_ICMPGE:
case Code.IF_ICMPGT:
case Code.IF_ICMPLE:
case Code.IFEQ:
case Code.IFNE:
case Code.IFLT:
case Code.IFGE:
case Code.IFGT:
case Code.IFLE:
case Code.IFNONNULL:
case Code.IFNULL:
case Code.JSR:
operand = new BranchOffset(ReadS16(ref offset));
break;
case Code.GOTO_W:
case Code.JSR_W:
operand = new BranchOffset(ReadS32(ref offset));
break;
case Code.ICONST_M1:
case Code.ICONST_0:
case Code.ICONST_1:
case Code.ICONST_2:
case Code.ICONST_3:
case Code.ICONST_4:
case Code.ICONST_5:
operand = (int)(opcode - Code.ICONST_0);
break;
case Code.IINC:
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
operand2 = ReadS8(ref offset);
break;
case Code.ILOAD_0:
case Code.ILOAD_1:
case Code.ILOAD_2:
case Code.ILOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.ILOAD_0);
break;
case Code.INVOKEINTERFACE:
// U16 method/imethod reference
operand = cp[ReadU16(ref offset)];
operand2 = ReadU8(ref offset);
offset++; // '0'
break;
case Code.INVOKESPECIAL:
case Code.INVOKESTATIC:
case Code.INVOKEVIRTUAL:
// U16 method/imethod reference
operand = cp[ReadU16(ref offset)];
break;
case Code.ISTORE_0:
case Code.ISTORE_1:
case Code.ISTORE_2:
case Code.ISTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.ISTORE_0);
break;
case Code.LCONST_0:
operand = 0L;
break;
case Code.LCONST_1:
operand = 1L;
break;
case Code.LDC:
operand = cp[ReadU8(ref offset)];
break;
case Code.LDC_W:
case Code.LDC2_W:
operand = cp[ReadU16(ref offset)];
break;
case Code.LLOAD_0:
case Code.LLOAD_1:
case Code.LLOAD_2:
case Code.LLOAD_3:
operand = GetLocalVariable(startOffset, opcode - Code.LLOAD_0);
break;
case Code.LOOKUPSWITCH:
operand = ReadLookupSwitch(ref offset);
break;
case Code.LSTORE_0:
case Code.LSTORE_1:
case Code.LSTORE_2:
case Code.LSTORE_3:
operand = GetLocalVariable(startOffset, opcode - Code.LSTORE_0);
break;
case Code.MULTIANEWARRAY:
operand = cp.GetEntry<ConstantPoolClass>(ReadU16(ref offset));
operand2 = ReadU8(ref offset);
break;
case Code.NEWARRAY:
operand = ReadU8(ref offset);
break;
case Code.RET:
operand = GetLocalVariable(startOffset, ReadU8(ref offset));
break;
case Code.SIPUSH:
operand = ReadS16(ref offset);
break;
case Code.TABLESWITCH:
operand = ReadTableSwitch(ref offset);
break;
case Code.WIDE:
opcode = (Code) code[offset++];
operand = GetLocalVariable(startOffset, ReadU16(ref offset));
if (opcode == Code.IINC)
{
operand2 = ReadS16(ref offset);
}
break;
}
instructions.Add(new Instruction(startOffset, opcode, operand, operand2));
}
return instructions;
}
/// <summary>
/// Read a TABLESWITCH payload
/// </summary>
private TableSwitchData ReadTableSwitch(ref int offset)
{
while ((offset % 4) != 0)
offset++;
var defByte = new BranchOffset(ReadS32(ref offset));
var lowByte = ReadS32(ref offset);
var highByte = ReadS32(ref offset);
var offsets = new BranchOffset[highByte - lowByte + 1];
for (var i = 0; i < offsets.Length; i++)
{
offsets[i] = new BranchOffset(ReadS32(ref offset));
}
return new TableSwitchData(defByte, lowByte, highByte, offsets);
}
/// <summary>
/// Read a LOOKUPSWITCH payload
/// </summary>
private LookupSwitchData ReadLookupSwitch(ref int offset)
{
while ((offset % 4) != 0)
offset++;
var defByte = new BranchOffset(ReadS32(ref offset));
var npairs = ReadS32(ref offset);
var pairs = new List<LookupSwitchData.Pair>();
for (var i = 0; i < npairs; i++)
{
var match = ReadS32(ref offset);
var _offset = new BranchOffset(ReadS32(ref offset));
pairs.Add(new LookupSwitchData.Pair(match, _offset));
}
return new LookupSwitchData(defByte, pairs.ToArray());
}
internal Pair(int match, BranchOffset offset)
{
Match = match;
this.offset = offset;
}
internal LookupSwitchData(BranchOffset defaultByte, Pair[] pairs)
{
this.defaultByte = defaultByte;
Pairs = pairs;
}
