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Move StackBehaviour code to separate file

pull/1/head^2
David Srbecký 19 years ago
parent
53eed43bf5
commit
b7486c3221
3 changed files with 123 additions and 110 deletions
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  1. 1
      Decompiler.csproj
  2. 122
      src/ByteCode.StackBehaviour.cs
  3. 110
      src/ByteCode.cs

1
Decompiler.csproj
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@ -40,6 +40,7 @@
<Compile Include="src\AstBuilder.cs" /> <Compile Include="src\AstBuilder.cs" />
<Compile Include="src\AstMetodBodyBuilder.cs" /> <Compile Include="src\AstMetodBodyBuilder.cs" />
<Compile Include="src\ByteCode.cs" /> <Compile Include="src\ByteCode.cs" />
<Compile Include="src\ByteCode.StackBehaviour.cs" />
<Compile Include="src\ByteCode.Type.cs" /> <Compile Include="src\ByteCode.Type.cs" />
<Compile Include="src\ByteCodeCollection.cs" /> <Compile Include="src\ByteCodeCollection.cs" />
<Compile Include="src\MainForm.cs" /> <Compile Include="src\MainForm.cs" />

122
src/ByteCode.StackBehaviour.cs
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@ -0,0 +1,122 @@
using System;
using System.Collections.Generic;
using Cecil = Mono.Cecil;
using Mono.Cecil;
using Mono.Cecil.Cil;
namespace Decompiler
{
public partial class ByteCode
{
public int PopCount {
get {
int popCount;
int pushCount;
SimulateStackSize(out popCount, out pushCount);
return popCount;
}
}
public int PushCount {
get {
int popCount;
int pushCount;
SimulateStackSize(out popCount, out pushCount);
return pushCount;
}
}
void SimulateStackSize(out int popCount, out int pushCount)
{
int stackSize = 0;
int minStackSize = 0;
foreach(ByteCode bc in nestedByteCodes) {
stackSize -= bc.PopCount;
minStackSize = Math.Min(minStackSize, stackSize);
stackSize += bc.PushCount;
}
{
stackSize -= GetPopCount(methodDef, this);
minStackSize = Math.Min(minStackSize, stackSize);
stackSize += GetPushCount(methodDef, this);
}
popCount = -minStackSize;
pushCount = stackSize - minStackSize;
}
static int GetPopCount(MethodDefinition methodDef, ByteCode byteCode)
{
switch(byteCode.OpCode.StackBehaviourPop) {
case StackBehaviour.Pop0: return 0;
case StackBehaviour.Pop1: return 1;
case StackBehaviour.Popi: return 1;
case StackBehaviour.Popref: return 1;
case StackBehaviour.Pop1_pop1: return 2;
case StackBehaviour.Popi_pop1: return 2;
case StackBehaviour.Popi_popi: return 2;
case StackBehaviour.Popi_popi8: return 2;
case StackBehaviour.Popi_popr4: return 2;
case StackBehaviour.Popi_popr8: return 2;
case StackBehaviour.Popref_pop1: return 2;
case StackBehaviour.Popref_popi: return 2;
case StackBehaviour.Popi_popi_popi: return 3;
case StackBehaviour.Popref_popi_popi: return 3;
case StackBehaviour.Popref_popi_popi8: return 3;
case StackBehaviour.Popref_popi_popr4: return 3;
case StackBehaviour.Popref_popi_popr8: return 3;
case StackBehaviour.Popref_popi_popref: return 3;
case StackBehaviour.PopAll: throw new Exception("PopAll");
case StackBehaviour.Varpop:
switch(byteCode.OpCode.Code) {
case Code.Call:
Cecil.MethodReference cecilMethod = ((MethodReference)byteCode.Operand);
if (cecilMethod.HasThis) {
return cecilMethod.Parameters.Count + 1 /* this */;
} else {
return cecilMethod.Parameters.Count;
}
case Code.Calli: throw new NotImplementedException();
case Code.Callvirt: throw new NotImplementedException();
case Code.Ret:
if (methodDef.ReturnType.ReturnType.FullName == Constants.Void) {
return 0;
} else {
return 1;
}
case Code.Newobj: throw new NotImplementedException();
default: throw new Exception("Unknown Varpop opcode");
}
default: throw new Exception("Unknown pop behaviour: " + byteCode.OpCode.StackBehaviourPop);
}
}
static int GetPushCount(MethodDefinition methodDef, ByteCode byteCode)
{
switch(byteCode.OpCode.StackBehaviourPush) {
case StackBehaviour.Push0: return 0;
case StackBehaviour.Push1: return 1;
case StackBehaviour.Push1_push1: return 2;
case StackBehaviour.Pushi: return 1;
case StackBehaviour.Pushi8: return 1;
case StackBehaviour.Pushr4: return 1;
case StackBehaviour.Pushr8: return 1;
case StackBehaviour.Pushref: return 1;
case StackBehaviour.Varpush: // Happens only for calls
switch(byteCode.OpCode.Code) {
case Code.Call:
Cecil.MethodReference cecilMethod = ((MethodReference)byteCode.Operand);
if (cecilMethod.ReturnType.ReturnType.FullName == Constants.Void) {
return 0;
} else {
return 1;
}
case Code.Calli: throw new NotImplementedException();
case Code.Callvirt: throw new NotImplementedException();
default: throw new Exception("Unknown Varpush opcode");
}
default: throw new Exception("Unknown push behaviour: " + byteCode.OpCode.StackBehaviourPush);
}
}
}
}

110
src/ByteCode.cs
Unescape View File

@ -29,42 +29,6 @@ namespace Decompiler
set { next = value; } set { next = value; }
} }
public int PopCount {
get {
int popCount;
int pushCount;
SimulateStackSize(out popCount, out pushCount);
return popCount;
}
}
public int PushCount {
get {
int popCount;
int pushCount;
SimulateStackSize(out popCount, out pushCount);
return pushCount;
}
}
void SimulateStackSize(out int popCount, out int pushCount)
{
int stackSize = 0;
int minStackSize = 0;
foreach(ByteCode bc in nestedByteCodes) {
stackSize -= bc.PopCount;
minStackSize = Math.Min(minStackSize, stackSize);
stackSize += bc.PushCount;
}
{
stackSize -= GetPopCount(methodDef, this);
minStackSize = Math.Min(minStackSize, stackSize);
stackSize += GetPushCount(methodDef, this);
}
popCount = -minStackSize;
pushCount = stackSize - minStackSize;
}
public List<ByteCode> NestedByteCodes { public List<ByteCode> NestedByteCodes {
get { return nestedByteCodes; } get { return nestedByteCodes; }
} }
@ -104,79 +68,5 @@ namespace Decompiler
this.opCode = inst.OpCode; this.opCode = inst.OpCode;
this.operand = inst.Operand; this.operand = inst.Operand;
} }
static int GetPopCount(MethodDefinition methodDef, ByteCode byteCode)
{
switch(byteCode.OpCode.StackBehaviourPop) {
case StackBehaviour.Pop0: return 0;
case StackBehaviour.Pop1: return 1;
case StackBehaviour.Popi: return 1;
case StackBehaviour.Popref: return 1;
case StackBehaviour.Pop1_pop1: return 2;
case StackBehaviour.Popi_pop1: return 2;
case StackBehaviour.Popi_popi: return 2;
case StackBehaviour.Popi_popi8: return 2;
case StackBehaviour.Popi_popr4: return 2;
case StackBehaviour.Popi_popr8: return 2;
case StackBehaviour.Popref_pop1: return 2;
case StackBehaviour.Popref_popi: return 2;
case StackBehaviour.Popi_popi_popi: return 3;
case StackBehaviour.Popref_popi_popi: return 3;
case StackBehaviour.Popref_popi_popi8: return 3;
case StackBehaviour.Popref_popi_popr4: return 3;
case StackBehaviour.Popref_popi_popr8: return 3;
case StackBehaviour.Popref_popi_popref: return 3;
case StackBehaviour.PopAll: throw new Exception("PopAll");
case StackBehaviour.Varpop:
switch(byteCode.OpCode.Code) {
case Code.Call:
Cecil.MethodReference cecilMethod = ((MethodReference)byteCode.Operand);
if (cecilMethod.HasThis) {
return cecilMethod.Parameters.Count + 1 /* this */;
} else {
return cecilMethod.Parameters.Count;
}
case Code.Calli: throw new NotImplementedException();
case Code.Callvirt: throw new NotImplementedException();
case Code.Ret:
if (methodDef.ReturnType.ReturnType.FullName == Constants.Void) {
return 0;
} else {
return 1;
}
case Code.Newobj: throw new NotImplementedException();
default: throw new Exception("Unknown Varpop opcode");
}
default: throw new Exception("Unknown pop behaviour: " + byteCode.OpCode.StackBehaviourPop);
}
}
static int GetPushCount(MethodDefinition methodDef, ByteCode byteCode)
{
switch(byteCode.OpCode.StackBehaviourPush) {
case StackBehaviour.Push0: return 0;
case StackBehaviour.Push1: return 1;
case StackBehaviour.Push1_push1: return 2;
case StackBehaviour.Pushi: return 1;
case StackBehaviour.Pushi8: return 1;
case StackBehaviour.Pushr4: return 1;
case StackBehaviour.Pushr8: return 1;
case StackBehaviour.Pushref: return 1;
case StackBehaviour.Varpush: // Happens only for calls
switch(byteCode.OpCode.Code) {
case Code.Call:
Cecil.MethodReference cecilMethod = ((MethodReference)byteCode.Operand);
if (cecilMethod.ReturnType.ReturnType.FullName == Constants.Void) {
return 0;
} else {
return 1;
}
case Code.Calli: throw new NotImplementedException();
case Code.Callvirt: throw new NotImplementedException();
default: throw new Exception("Unknown Varpush opcode");
}
default: throw new Exception("Unknown push behaviour: " + byteCode.OpCode.StackBehaviourPush);
}
}
} }
} }

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