mirror of https://github.com/icsharpcode/ILSpy.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
804 lines
28 KiB
804 lines
28 KiB
// Copyright (c) 2014 Daniel Grunwald |
|
// |
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of this |
|
// software and associated documentation files (the "Software"), to deal in the Software |
|
// without restriction, including without limitation the rights to use, copy, modify, merge, |
|
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons |
|
// to whom the Software is furnished to do so, subject to the following conditions: |
|
// |
|
// The above copyright notice and this permission notice shall be included in all copies or |
|
// substantial portions of the Software. |
|
// |
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
|
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
|
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE |
|
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
|
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
|
// DEALINGS IN THE SOFTWARE. |
|
|
|
using System; |
|
using System.Collections.Generic; |
|
using System.Linq; |
|
using System.Text; |
|
using System.Threading.Tasks; |
|
using System.Collections.Immutable; |
|
using System.Diagnostics; |
|
using Mono.Cecil; |
|
using Cil = Mono.Cecil.Cil; |
|
using System.Collections; |
|
using System.Threading; |
|
|
|
namespace ICSharpCode.Decompiler.IL |
|
{ |
|
public class ILReader |
|
{ |
|
internal static ILOpCode ReadOpCode(ref BlobReader reader) |
|
{ |
|
byte b = reader.ReadByte(); |
|
if (b == 0xfe) |
|
return (ILOpCode)(0x100 | reader.ReadByte()); |
|
else |
|
return (ILOpCode)b; |
|
} |
|
|
|
internal static MetadataToken ReadMetadataToken(ref BlobReader reader) |
|
{ |
|
return new MetadataToken(reader.ReadUInt32()); |
|
} |
|
|
|
Cil.MethodBody body; |
|
TypeSystem typeSystem; |
|
|
|
BlobReader reader; |
|
Stack<StackType> stack; |
|
ILVariable[] parameterVariables; |
|
ILVariable[] localVariables; |
|
BitArray isBranchTarget; |
|
List<ILInstruction> instructionBuilder; |
|
|
|
// Dictionary that stores stacks for forward jumps |
|
Dictionary<int, ImmutableArray<StackType>> branchStackDict; |
|
|
|
void Init(Cil.MethodBody body) |
|
{ |
|
if (body == null) |
|
throw new ArgumentNullException("body"); |
|
this.body = body; |
|
this.typeSystem = body.Method.Module.TypeSystem; |
|
this.reader = body.GetILReader(); |
|
this.stack = new Stack<StackType>(body.MaxStackSize); |
|
this.parameterVariables = InitParameterVariables(body); |
|
this.localVariables = body.Variables.Select(v => new ILVariable(v)).ToArray(); |
|
this.instructionBuilder = new List<ILInstruction>(); |
|
this.isBranchTarget = new BitArray(body.CodeSize); |
|
this.branchStackDict = new Dictionary<int, ImmutableArray<StackType>>(); |
|
} |
|
|
|
IMetadataTokenProvider ReadAndDecodeMetadataToken() |
|
{ |
|
var token = ReadMetadataToken(ref reader); |
|
return body.LookupToken(token); |
|
} |
|
|
|
static ILVariable[] InitParameterVariables(Mono.Cecil.Cil.MethodBody body) |
|
{ |
|
var parameterVariables = new ILVariable[body.Method.GetPopAmount()]; |
|
int paramIndex = 0; |
|
if (body.Method.HasThis) |
|
parameterVariables[paramIndex++] = new ILVariable(body.ThisParameter); |
|
foreach (var p in body.Method.Parameters) |
|
parameterVariables[paramIndex++] = new ILVariable(p); |
|
Debug.Assert(paramIndex == parameterVariables.Length); |
|
return parameterVariables; |
|
} |
|
|
|
void Warn(string message) |
|
{ |
|
Debug.Fail(message); |
|
} |
|
|
|
void ReadInstructions(Dictionary<int, ImmutableArray<StackType>> outputStacks, CancellationToken cancellationToken) |
|
{ |
|
// Fill isBranchTarget and branchStackDict based on exception handlers |
|
foreach (var eh in body.ExceptionHandlers) { |
|
if (eh.FilterStart != null) { |
|
isBranchTarget[eh.FilterStart.Offset] = true; |
|
branchStackDict[eh.FilterStart.Offset] = ImmutableArray.Create(eh.CatchType.GetStackType()); |
|
} |
|
if (eh.HandlerStart != null) { |
|
isBranchTarget[eh.HandlerStart.Offset] = true; |
|
if (eh.HandlerType == Cil.ExceptionHandlerType.Catch || eh.HandlerType == Cil.ExceptionHandlerType.Filter) |
|
branchStackDict[eh.HandlerStart.Offset] = ImmutableArray.Create(eh.CatchType.GetStackType()); |
|
else |
|
branchStackDict[eh.HandlerStart.Offset] = ImmutableArray<StackType>.Empty; |
|
} |
|
} |
|
|
|
while (reader.Position < reader.Length) { |
|
cancellationToken.ThrowIfCancellationRequested(); |
|
int start = reader.Position; |
|
if (outputStacks != null) |
|
outputStacks.Add(start, stack.ToImmutableArray()); |
|
ILInstruction decodedInstruction = DecodeInstruction(); |
|
decodedInstruction.CheckInvariant(); |
|
if (decodedInstruction.ResultType != StackType.Void) |
|
stack.Push(decodedInstruction.ResultType); |
|
decodedInstruction.ILRange = new Interval(start, reader.Position); |
|
instructionBuilder.Add(decodedInstruction); |
|
if (decodedInstruction.HasFlag(InstructionFlags.EndPointUnreachable)) { |
|
stack.Clear(); |
|
ImmutableArray<StackType> stackFromBranch; |
|
if (branchStackDict.TryGetValue(reader.Position, out stackFromBranch)) { |
|
for (int i = stackFromBranch.Length - 1; i >= 0; i--) { |
|
stack.Push(stackFromBranch[i]); |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
/// <summary> |
|
/// Debugging helper: writes the decoded instruction stream interleaved with the inferred evaluation stack layout. |
|
/// </summary> |
|
public void WriteTypedIL(Cil.MethodBody body, ITextOutput output, CancellationToken cancellationToken = default(CancellationToken)) |
|
{ |
|
Init(body); |
|
var outputStacks = new Dictionary<int, ImmutableArray<StackType>>(); |
|
ReadInstructions(outputStacks, cancellationToken); |
|
foreach (var inst in instructionBuilder) { |
|
output.Write(" ["); |
|
bool isFirstElement = true; |
|
foreach (var element in outputStacks[inst.ILRange.Start]) { |
|
if (isFirstElement) |
|
isFirstElement = false; |
|
else |
|
output.Write(", "); |
|
output.Write(element); |
|
} |
|
output.Write(']'); |
|
output.WriteLine(); |
|
if (isBranchTarget[inst.ILRange.Start]) |
|
output.Write('*'); |
|
else |
|
output.Write(' '); |
|
output.WriteDefinition("IL_" + inst.ILRange.Start.ToString("x4"), inst.ILRange.Start); |
|
output.Write(": "); |
|
inst.WriteTo(output); |
|
output.WriteLine(); |
|
} |
|
new Disassembler.MethodBodyDisassembler(output, false, cancellationToken).WriteExceptionHandlers(body); |
|
} |
|
|
|
/// <summary> |
|
/// Decodes the specified method body and returns an ILFunction. |
|
/// </summary> |
|
public ILFunction ReadIL(Cil.MethodBody body, CancellationToken cancellationToken = default(CancellationToken)) |
|
{ |
|
Init(body); |
|
ReadInstructions(null, cancellationToken); |
|
var container = new BlockBuilder(body).CreateBlocks(instructionBuilder, isBranchTarget); |
|
var function = new ILFunction(body.Method, container); |
|
function.Variables.AddRange(parameterVariables); |
|
function.Variables.AddRange(localVariables); |
|
function.AddRef(); // mark the root node |
|
return function; |
|
} |
|
|
|
ILInstruction Neg() |
|
{ |
|
switch (stack.PeekOrDefault()) { |
|
case StackType.I4: |
|
case StackType.I: |
|
return new Sub(new LdcI4(0), Pop(), checkForOverflow: false, sign: Sign.None); |
|
case StackType.I8: |
|
return new Sub(new LdcI8(0), Pop(), checkForOverflow: false, sign: Sign.None); |
|
case StackType.F: |
|
return new Sub(new LdcF(0), Pop(), checkForOverflow: false, sign: Sign.None); |
|
default: |
|
Warn("Unsupported input type for neg: "); |
|
goto case StackType.I4; |
|
} |
|
} |
|
|
|
ILInstruction DecodeInstruction() |
|
{ |
|
var ilOpCode = ReadOpCode(ref reader); |
|
switch (ilOpCode) { |
|
case ILOpCode.Constrained: |
|
return DecodeConstrainedCall(); |
|
case ILOpCode.Readonly: |
|
return DecodeReadonly(); |
|
case ILOpCode.Tailcall: |
|
return DecodeTailCall(); |
|
case ILOpCode.Unaligned: |
|
return DecodeUnaligned(); |
|
case ILOpCode.Volatile: |
|
return DecodeVolatile(); |
|
case ILOpCode.Add: |
|
return BinaryNumeric(OpCode.Add); |
|
case ILOpCode.Add_Ovf: |
|
return BinaryNumeric(OpCode.Add, true, Sign.Signed); |
|
case ILOpCode.Add_Ovf_Un: |
|
return BinaryNumeric(OpCode.Add, true, Sign.Unsigned); |
|
case ILOpCode.And: |
|
return BinaryNumeric(OpCode.BitAnd); |
|
case ILOpCode.Arglist: |
|
return new Arglist(); |
|
case ILOpCode.Beq: |
|
return DecodeComparisonBranch(false, OpCode.Ceq, OpCode.Ceq, false); |
|
case ILOpCode.Beq_S: |
|
return DecodeComparisonBranch(true, OpCode.Ceq, OpCode.Ceq, false); |
|
case ILOpCode.Bge: |
|
return DecodeComparisonBranch(false, OpCode.Clt, OpCode.Clt_Un, true); |
|
case ILOpCode.Bge_S: |
|
return DecodeComparisonBranch(true, OpCode.Clt, OpCode.Clt_Un, true); |
|
case ILOpCode.Bge_Un: |
|
return DecodeComparisonBranch(false, OpCode.Clt_Un, OpCode.Clt, true); |
|
case ILOpCode.Bge_Un_S: |
|
return DecodeComparisonBranch(true, OpCode.Clt_Un, OpCode.Clt, true); |
|
case ILOpCode.Bgt: |
|
return DecodeComparisonBranch(false, OpCode.Cgt, OpCode.Cgt, false); |
|
case ILOpCode.Bgt_S: |
|
return DecodeComparisonBranch(true, OpCode.Cgt, OpCode.Cgt, false); |
|
case ILOpCode.Bgt_Un: |
|
return DecodeComparisonBranch(false, OpCode.Cgt_Un, OpCode.Clt_Un, false); |
|
case ILOpCode.Bgt_Un_S: |
|
return DecodeComparisonBranch(true, OpCode.Cgt_Un, OpCode.Clt_Un, false); |
|
case ILOpCode.Ble: |
|
return DecodeComparisonBranch(false, OpCode.Cgt, OpCode.Cgt_Un, true); |
|
case ILOpCode.Ble_S: |
|
return DecodeComparisonBranch(true, OpCode.Cgt, OpCode.Cgt_Un, true); |
|
case ILOpCode.Ble_Un: |
|
return DecodeComparisonBranch(false, OpCode.Cgt_Un, OpCode.Cgt, true); |
|
case ILOpCode.Ble_Un_S: |
|
return DecodeComparisonBranch(true, OpCode.Cgt_Un, OpCode.Cgt, true); |
|
case ILOpCode.Blt: |
|
return DecodeComparisonBranch(false, OpCode.Clt, OpCode.Clt, false); |
|
case ILOpCode.Blt_S: |
|
return DecodeComparisonBranch(true, OpCode.Clt, OpCode.Clt, false); |
|
case ILOpCode.Blt_Un: |
|
return DecodeComparisonBranch(false, OpCode.Clt_Un, OpCode.Clt_Un, false); |
|
case ILOpCode.Blt_Un_S: |
|
return DecodeComparisonBranch(true, OpCode.Clt_Un, OpCode.Clt_Un, false); |
|
case ILOpCode.Bne_Un: |
|
return DecodeComparisonBranch(false, OpCode.Ceq, OpCode.Ceq, true); |
|
case ILOpCode.Bne_Un_S: |
|
return DecodeComparisonBranch(true, OpCode.Ceq, OpCode.Ceq, true); |
|
case ILOpCode.Br: |
|
return DecodeUnconditionalBranch(false); |
|
case ILOpCode.Br_S: |
|
return DecodeUnconditionalBranch(true); |
|
case ILOpCode.Break: |
|
return new DebugBreak(); |
|
case ILOpCode.Brfalse: |
|
return DecodeConditionalBranch(false, true); |
|
case ILOpCode.Brfalse_S: |
|
return DecodeConditionalBranch(true, true); |
|
case ILOpCode.Brtrue: |
|
return DecodeConditionalBranch(false, false); |
|
case ILOpCode.Brtrue_S: |
|
return DecodeConditionalBranch(true, false); |
|
case ILOpCode.Call: |
|
return DecodeCall(OpCode.Call); |
|
case ILOpCode.Callvirt: |
|
return DecodeCall(OpCode.CallVirt); |
|
case ILOpCode.Calli: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Ceq: |
|
return Comparison(OpCode.Ceq, OpCode.Ceq); |
|
case ILOpCode.Cgt: |
|
return Comparison(OpCode.Cgt, OpCode.Cgt); |
|
case ILOpCode.Cgt_Un: |
|
return Comparison(OpCode.Cgt_Un, OpCode.Cgt_Un); |
|
case ILOpCode.Clt: |
|
return Comparison(OpCode.Clt, OpCode.Clt); |
|
case ILOpCode.Clt_Un: |
|
return Comparison(OpCode.Clt_Un, OpCode.Clt_Un); |
|
case ILOpCode.Ckfinite: |
|
return new Ckfinite(); |
|
case ILOpCode.Conv_I1: |
|
return new Conv(Pop(), PrimitiveType.I1, false, Sign.None); |
|
case ILOpCode.Conv_I2: |
|
return new Conv(Pop(), PrimitiveType.I2, false, Sign.None); |
|
case ILOpCode.Conv_I4: |
|
return new Conv(Pop(), PrimitiveType.I4, false, Sign.None); |
|
case ILOpCode.Conv_I8: |
|
return new Conv(Pop(), PrimitiveType.I8, false, Sign.None); |
|
case ILOpCode.Conv_R4: |
|
return new Conv(Pop(), PrimitiveType.R4, false, Sign.Signed); |
|
case ILOpCode.Conv_R8: |
|
return new Conv(Pop(), PrimitiveType.R8, false, Sign.Signed); |
|
case ILOpCode.Conv_U1: |
|
return new Conv(Pop(), PrimitiveType.U1, false, Sign.None); |
|
case ILOpCode.Conv_U2: |
|
return new Conv(Pop(), PrimitiveType.U2, false, Sign.None); |
|
case ILOpCode.Conv_U4: |
|
return new Conv(Pop(), PrimitiveType.U4, false, Sign.None); |
|
case ILOpCode.Conv_U8: |
|
return new Conv(Pop(), PrimitiveType.U8, false, Sign.None); |
|
case ILOpCode.Conv_I: |
|
return new Conv(Pop(), PrimitiveType.I, false, Sign.None); |
|
case ILOpCode.Conv_U: |
|
return new Conv(Pop(), PrimitiveType.U, false, Sign.None); |
|
case ILOpCode.Conv_R_Un: |
|
return new Conv(Pop(), PrimitiveType.R8, false, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_I1: |
|
return new Conv(Pop(), PrimitiveType.I1, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_I2: |
|
return new Conv(Pop(), PrimitiveType.I2, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_I4: |
|
return new Conv(Pop(), PrimitiveType.I4, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_I8: |
|
return new Conv(Pop(), PrimitiveType.I8, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_U1: |
|
return new Conv(Pop(), PrimitiveType.U1, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_U2: |
|
return new Conv(Pop(), PrimitiveType.U2, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_U4: |
|
return new Conv(Pop(), PrimitiveType.U4, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_U8: |
|
return new Conv(Pop(), PrimitiveType.U8, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_I: |
|
return new Conv(Pop(), PrimitiveType.I, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_U: |
|
return new Conv(Pop(), PrimitiveType.U, true, Sign.Signed); |
|
case ILOpCode.Conv_Ovf_I1_Un: |
|
return new Conv(Pop(), PrimitiveType.I1, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_I2_Un: |
|
return new Conv(Pop(), PrimitiveType.I2, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_I4_Un: |
|
return new Conv(Pop(), PrimitiveType.I4, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_I8_Un: |
|
return new Conv(Pop(), PrimitiveType.I8, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_U1_Un: |
|
return new Conv(Pop(), PrimitiveType.U1, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_U2_Un: |
|
return new Conv(Pop(), PrimitiveType.U2, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_U4_Un: |
|
return new Conv(Pop(), PrimitiveType.U4, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_U8_Un: |
|
return new Conv(Pop(), PrimitiveType.U8, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_I_Un: |
|
return new Conv(Pop(), PrimitiveType.I, true, Sign.Unsigned); |
|
case ILOpCode.Conv_Ovf_U_Un: |
|
return new Conv(Pop(), PrimitiveType.U, true, Sign.Unsigned); |
|
case ILOpCode.Cpblk: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Div: |
|
return BinaryNumeric(OpCode.Div, false, Sign.Signed); |
|
case ILOpCode.Div_Un: |
|
return BinaryNumeric(OpCode.Div, false, Sign.Unsigned); |
|
case ILOpCode.Dup: |
|
return new Peek(stack.Count > 0 ? stack.Peek() : StackType.Unknown); |
|
case ILOpCode.Endfilter: |
|
case ILOpCode.Endfinally: |
|
return new EndFinally(); |
|
case ILOpCode.Initblk: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Jmp: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Ldarg: |
|
return Ldarg(reader.ReadUInt16()); |
|
case ILOpCode.Ldarg_S: |
|
return Ldarg(reader.ReadByte()); |
|
case ILOpCode.Ldarg_0: |
|
case ILOpCode.Ldarg_1: |
|
case ILOpCode.Ldarg_2: |
|
case ILOpCode.Ldarg_3: |
|
return Ldarg(ilOpCode - ILOpCode.Ldarg_0); |
|
case ILOpCode.Ldarga: |
|
return Ldarga(reader.ReadUInt16()); |
|
case ILOpCode.Ldarga_S: |
|
return Ldarga(reader.ReadByte()); |
|
case ILOpCode.Ldc_I4: |
|
return new LdcI4(reader.ReadInt32()); |
|
case ILOpCode.Ldc_I8: |
|
return new LdcI8(reader.ReadInt64()); |
|
case ILOpCode.Ldc_R4: |
|
return new LdcF(reader.ReadSingle()); |
|
case ILOpCode.Ldc_R8: |
|
return new LdcF(reader.ReadDouble()); |
|
case ILOpCode.Ldc_I4_M1: |
|
case ILOpCode.Ldc_I4_0: |
|
case ILOpCode.Ldc_I4_1: |
|
case ILOpCode.Ldc_I4_2: |
|
case ILOpCode.Ldc_I4_3: |
|
case ILOpCode.Ldc_I4_4: |
|
case ILOpCode.Ldc_I4_5: |
|
case ILOpCode.Ldc_I4_6: |
|
case ILOpCode.Ldc_I4_7: |
|
case ILOpCode.Ldc_I4_8: |
|
return new LdcI4((int)ilOpCode - (int)ILOpCode.Ldc_I4_0); |
|
case ILOpCode.Ldc_I4_S: |
|
return new LdcI4(reader.ReadSByte()); |
|
case ILOpCode.Ldnull: |
|
return new LdNull(); |
|
case ILOpCode.Ldstr: |
|
return DecodeLdstr(); |
|
case ILOpCode.Ldftn: |
|
return new LdFtn((MethodReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldind_I1: |
|
return new LdObj(Pop(), typeSystem.SByte); |
|
case ILOpCode.Ldind_I2: |
|
return new LdObj(Pop(), typeSystem.Int16); |
|
case ILOpCode.Ldind_I4: |
|
return new LdObj(Pop(), typeSystem.Int32); |
|
case ILOpCode.Ldind_I8: |
|
return new LdObj(Pop(), typeSystem.Int64); |
|
case ILOpCode.Ldind_U1: |
|
return new LdObj(Pop(), typeSystem.Byte); |
|
case ILOpCode.Ldind_U2: |
|
return new LdObj(Pop(), typeSystem.UInt16); |
|
case ILOpCode.Ldind_U4: |
|
return new LdObj(Pop(), typeSystem.UInt32); |
|
case ILOpCode.Ldind_R4: |
|
return new LdObj(Pop(), typeSystem.Single); |
|
case ILOpCode.Ldind_R8: |
|
return new LdObj(Pop(), typeSystem.Double); |
|
case ILOpCode.Ldind_I: |
|
return new LdObj(Pop(), typeSystem.IntPtr); |
|
case ILOpCode.Ldind_Ref: |
|
return new LdObj(Pop(), typeSystem.Object); |
|
case ILOpCode.Ldloc: |
|
return Ldloc(reader.ReadUInt16()); |
|
case ILOpCode.Ldloc_S: |
|
return Ldloc(reader.ReadByte()); |
|
case ILOpCode.Ldloc_0: |
|
case ILOpCode.Ldloc_1: |
|
case ILOpCode.Ldloc_2: |
|
case ILOpCode.Ldloc_3: |
|
return Ldloc(ilOpCode - ILOpCode.Ldloc_0); |
|
case ILOpCode.Ldloca: |
|
return Ldloca(reader.ReadUInt16()); |
|
case ILOpCode.Ldloca_S: |
|
return Ldloca(reader.ReadByte()); |
|
case ILOpCode.Leave: |
|
return DecodeUnconditionalBranch(false, isLeave: true); |
|
case ILOpCode.Leave_S: |
|
return DecodeUnconditionalBranch(true, isLeave: true); |
|
case ILOpCode.Localloc: |
|
return new LocAlloc(Pop()); |
|
case ILOpCode.Mul: |
|
return BinaryNumeric(OpCode.Mul, false, Sign.None); |
|
case ILOpCode.Mul_Ovf: |
|
return BinaryNumeric(OpCode.Mul, true, Sign.Signed); |
|
case ILOpCode.Mul_Ovf_Un: |
|
return BinaryNumeric(OpCode.Mul, true, Sign.Unsigned); |
|
case ILOpCode.Neg: |
|
return Neg(); |
|
case ILOpCode.Newobj: |
|
return DecodeCall(OpCode.NewObj); |
|
case ILOpCode.Nop: |
|
return new Nop(); |
|
case ILOpCode.Not: |
|
return new BitNot(Pop()); |
|
case ILOpCode.Or: |
|
return BinaryNumeric(OpCode.BitOr); |
|
case ILOpCode.Pop: |
|
return new Void(Pop()); |
|
case ILOpCode.Rem: |
|
return BinaryNumeric(OpCode.Rem, false, Sign.Signed); |
|
case ILOpCode.Rem_Un: |
|
return BinaryNumeric(OpCode.Rem, false, Sign.Unsigned); |
|
case ILOpCode.Ret: |
|
return Return(); |
|
case ILOpCode.Shl: |
|
return BinaryNumeric(OpCode.Shl, false, Sign.None); |
|
case ILOpCode.Shr: |
|
return BinaryNumeric(OpCode.Shr, false, Sign.Signed); |
|
case ILOpCode.Shr_Un: |
|
return BinaryNumeric(OpCode.Shr, false, Sign.Unsigned); |
|
case ILOpCode.Starg: |
|
return Starg(reader.ReadUInt16()); |
|
case ILOpCode.Starg_S: |
|
return Starg(reader.ReadByte()); |
|
case ILOpCode.Stind_I1: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.SByte)); |
|
case ILOpCode.Stind_I2: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Int16)); |
|
case ILOpCode.Stind_I4: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Int32)); |
|
case ILOpCode.Stind_I8: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Int64)); |
|
case ILOpCode.Stind_R4: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Single)); |
|
case ILOpCode.Stind_R8: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Double)); |
|
case ILOpCode.Stind_I: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.IntPtr)); |
|
case ILOpCode.Stind_Ref: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: typeSystem.Object)); |
|
case ILOpCode.Stloc: |
|
return Stloc(reader.ReadUInt16()); |
|
case ILOpCode.Stloc_S: |
|
return Stloc(reader.ReadByte()); |
|
case ILOpCode.Stloc_0: |
|
case ILOpCode.Stloc_1: |
|
case ILOpCode.Stloc_2: |
|
case ILOpCode.Stloc_3: |
|
return Stloc(ilOpCode - ILOpCode.Stloc_0); |
|
case ILOpCode.Sub: |
|
return BinaryNumeric(OpCode.Sub, false, Sign.None); |
|
case ILOpCode.Sub_Ovf: |
|
return BinaryNumeric(OpCode.Sub, true, Sign.Signed); |
|
case ILOpCode.Sub_Ovf_Un: |
|
return BinaryNumeric(OpCode.Sub, true, Sign.Unsigned); |
|
case ILOpCode.Switch: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Xor: |
|
return BinaryNumeric(OpCode.BitXor); |
|
case ILOpCode.Box: |
|
return new Box(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Castclass: |
|
return new CastClass(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Cpobj: |
|
{ |
|
var type = (TypeReference)ReadAndDecodeMetadataToken(); |
|
var ld = new LdObj(Pop(), type); |
|
return new Void(new StObj(Pop(), ld, type)); |
|
} |
|
case ILOpCode.Initobj: |
|
return new InitObj(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Isinst: |
|
return new IsInst(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldelem: |
|
case ILOpCode.Ldelem_I1: |
|
case ILOpCode.Ldelem_I2: |
|
case ILOpCode.Ldelem_I4: |
|
case ILOpCode.Ldelem_I8: |
|
case ILOpCode.Ldelem_U1: |
|
case ILOpCode.Ldelem_U2: |
|
case ILOpCode.Ldelem_U4: |
|
case ILOpCode.Ldelem_R4: |
|
case ILOpCode.Ldelem_R8: |
|
case ILOpCode.Ldelem_I: |
|
case ILOpCode.Ldelem_Ref: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Ldelema: |
|
return new LdElema(index: Pop(), array: Pop(), type: (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldfld: |
|
return new LdFld(Pop(), (FieldReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldflda: |
|
return new LdFlda(Pop(), (FieldReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Stfld: |
|
return new Void(new StFld(value: Pop(), target: Pop(), field: (FieldReference)ReadAndDecodeMetadataToken())); |
|
case ILOpCode.Ldlen: |
|
return new LdLen(Pop()); |
|
case ILOpCode.Ldobj: |
|
return new LdObj(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldsfld: |
|
return new LdsFld((FieldReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldsflda: |
|
return new LdsFlda((FieldReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Stsfld: |
|
return new Void(new StsFld(Pop(), (FieldReference)ReadAndDecodeMetadataToken())); |
|
case ILOpCode.Ldtoken: |
|
return new LdToken((MemberReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Ldvirtftn: |
|
return new LdVirtFtn(Pop(), (MethodReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Mkrefany: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Newarr: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Refanytype: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Refanyval: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Rethrow: |
|
return new Rethrow(); |
|
case ILOpCode.Sizeof: |
|
return new SizeOf((TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Stelem: |
|
case ILOpCode.Stelem_I1: |
|
case ILOpCode.Stelem_I2: |
|
case ILOpCode.Stelem_I4: |
|
case ILOpCode.Stelem_I8: |
|
case ILOpCode.Stelem_R4: |
|
case ILOpCode.Stelem_R8: |
|
case ILOpCode.Stelem_I: |
|
case ILOpCode.Stelem_Ref: |
|
throw new NotImplementedException(); |
|
case ILOpCode.Stobj: |
|
return new Void(new StObj(value: Pop(), target: Pop(), type: (TypeReference)ReadAndDecodeMetadataToken())); |
|
case ILOpCode.Throw: |
|
return new Throw(Pop()); |
|
case ILOpCode.Unbox: |
|
return new Unbox(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
case ILOpCode.Unbox_Any: |
|
return new UnboxAny(Pop(), (TypeReference)ReadAndDecodeMetadataToken()); |
|
default: |
|
throw new NotImplementedException(ilOpCode.ToString()); |
|
} |
|
} |
|
|
|
private IL.Pop Pop() |
|
{ |
|
if (stack.Count > 0) { |
|
return new IL.Pop(stack.Pop()); |
|
} else { |
|
Warn("Stack underflow"); |
|
return new IL.Pop(StackType.Unknown); |
|
} |
|
} |
|
|
|
|
|
private ILInstruction Return() |
|
{ |
|
if (body.Method.ReturnType.GetStackType() == StackType.Void) |
|
return new ICSharpCode.Decompiler.IL.Return(); |
|
else |
|
return new ICSharpCode.Decompiler.IL.Return(Pop()); |
|
} |
|
|
|
private ILInstruction DecodeLdstr() |
|
{ |
|
var metadataToken = ReadMetadataToken(ref reader); |
|
return new LdStr(body.LookupStringToken(metadataToken)); |
|
} |
|
|
|
private ILInstruction Ldarg(ushort v) |
|
{ |
|
return new LdLoc(parameterVariables[v]); |
|
} |
|
|
|
private ILInstruction Ldarga(ushort v) |
|
{ |
|
return new LdLoca(parameterVariables[v]); |
|
} |
|
|
|
private ILInstruction Starg(ushort v) |
|
{ |
|
return new Void(new StLoc(Pop(), parameterVariables[v])); |
|
} |
|
|
|
private ILInstruction Ldloc(ushort v) |
|
{ |
|
return new LdLoc(localVariables[v]); |
|
} |
|
|
|
private ILInstruction Ldloca(ushort v) |
|
{ |
|
return new LdLoca(localVariables[v]); |
|
} |
|
|
|
private ILInstruction Stloc(ushort v) |
|
{ |
|
return new Void(new StLoc(Pop(), localVariables[v])); |
|
} |
|
|
|
private ILInstruction DecodeConstrainedCall() |
|
{ |
|
var typeRef = ReadAndDecodeMetadataToken() as TypeReference; |
|
var inst = DecodeInstruction(); |
|
var call = inst as CallInstruction; |
|
if (call != null) |
|
call.ConstrainedTo = typeRef; |
|
return inst; |
|
} |
|
|
|
private ILInstruction DecodeTailCall() |
|
{ |
|
var inst = DecodeInstruction(); |
|
var call = inst as CallInstruction; |
|
if (call != null) |
|
call.IsTail = true; |
|
return inst; |
|
} |
|
|
|
private ILInstruction DecodeUnaligned() |
|
{ |
|
byte alignment = reader.ReadByte(); |
|
var inst = DecodeInstruction(); |
|
var sup = inst as ISupportsUnalignedPrefix; |
|
if (sup != null) |
|
sup.UnalignedPrefix = alignment; |
|
else |
|
Warn("Ignored invalid 'unaligned' prefix"); |
|
return inst; |
|
} |
|
|
|
private ILInstruction DecodeVolatile() |
|
{ |
|
var inst = DecodeInstruction(); |
|
var svp = inst as ISupportsVolatilePrefix; |
|
if (svp != null) |
|
svp.IsVolatile = true; |
|
else |
|
Warn("Ignored invalid 'volatile' prefix"); |
|
return inst; |
|
} |
|
|
|
private ILInstruction DecodeReadonly() |
|
{ |
|
var inst = DecodeInstruction(); |
|
var ldelema = inst as LdElema; |
|
if (ldelema != null) |
|
ldelema.IsReadOnly = true; |
|
else |
|
Warn("Ignored invalid 'readonly' prefix"); |
|
return inst; |
|
} |
|
|
|
ILInstruction DecodeCall(OpCode opCode) |
|
{ |
|
var method = (MethodReference)ReadAndDecodeMetadataToken(); |
|
var arguments = new ILInstruction[CallInstruction.GetPopCount(opCode, method)]; |
|
for (int i = arguments.Length - 1; i >= 0; i--) { |
|
arguments[i] = Pop(); |
|
} |
|
var call = CallInstruction.Create(opCode, method); |
|
call.Arguments.AddRange(arguments); |
|
return call; |
|
} |
|
|
|
ILInstruction Comparison(OpCode opCode_I, OpCode opCode_F) |
|
{ |
|
var right = Pop(); |
|
var left = Pop(); |
|
// Based on Table 4: Binary Comparison or Branch Operation |
|
if (left.ResultType == StackType.F && right.ResultType == StackType.F) |
|
return BinaryComparisonInstruction.Create(opCode_F, left, right); |
|
else |
|
return BinaryComparisonInstruction.Create(opCode_I, left, right); |
|
} |
|
|
|
ILInstruction DecodeComparisonBranch(bool shortForm, OpCode comparisonOpCodeForInts, OpCode comparisonOpCodeForFloats, bool negate) |
|
{ |
|
int start = reader.Position - 1; |
|
var condition = Comparison(comparisonOpCodeForInts, comparisonOpCodeForFloats); |
|
int target = shortForm ? reader.ReadSByte() : reader.ReadInt32(); |
|
target += reader.Position; |
|
condition.ILRange = new Interval(start, reader.Position); |
|
if (negate) { |
|
condition = new LogicNot(condition); |
|
} |
|
MarkBranchTarget(target); |
|
return new IfInstruction(condition, new Branch(target)); |
|
} |
|
|
|
ILInstruction DecodeConditionalBranch(bool shortForm, bool negate) |
|
{ |
|
int target = shortForm ? reader.ReadSByte() : reader.ReadInt32(); |
|
target += reader.Position; |
|
ILInstruction condition = Pop(); |
|
if (condition.ResultType == StackType.O) { |
|
// introduce explicit comparison with null |
|
condition = new Ceq(condition, new LdNull()); |
|
negate = !negate; |
|
} |
|
if (negate) { |
|
condition = new LogicNot(condition); |
|
} |
|
MarkBranchTarget(target); |
|
return new IfInstruction(condition, new Branch(target)); |
|
} |
|
|
|
ILInstruction DecodeUnconditionalBranch(bool shortForm, bool isLeave = false) |
|
{ |
|
int target = shortForm ? reader.ReadSByte() : reader.ReadInt32(); |
|
target += reader.Position; |
|
int popCount = 0; |
|
if (isLeave) { |
|
popCount = stack.Count; |
|
stack.Clear(); |
|
} |
|
MarkBranchTarget(target); |
|
return new Branch(target) { PopCount = popCount }; |
|
} |
|
|
|
void MarkBranchTarget(int targetILOffset) |
|
{ |
|
isBranchTarget[targetILOffset] = true; |
|
if (targetILOffset >= reader.Position) { |
|
branchStackDict[targetILOffset] = stack.ToImmutableArray(); |
|
} |
|
} |
|
|
|
ILInstruction BinaryNumeric(OpCode opCode, bool checkForOverflow = false, Sign sign = Sign.None) |
|
{ |
|
var right = Pop(); |
|
var left = Pop(); |
|
return BinaryNumericInstruction.Create(opCode, left, right, checkForOverflow, sign); |
|
} |
|
} |
|
}
|
|
|