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Merge branch 'master' into confuser

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This commit is contained in:
de4dot 2012-08-04 12:04:42 +02:00
commit a28e300140
3 changed files with 32 additions and 5 deletions
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4
blocks/cflow/BranchEmulator.cs
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@ -220,6 +220,8 @@ namespace de4dot.blocks.cflow {
return emulateBranch(1, Int64Value.compareFalse((Int64Value)val1));
else if (val1.isNull())
return emulateBranch(1, true);
else if (val1.isObject() || val1.isString() || val1.isBoxed())
return emulateBranch(1, false);
else
return false;
}
@ -233,6 +235,8 @@ namespace de4dot.blocks.cflow {
return emulateBranch(1, Int64Value.compareTrue((Int64Value)val1));
else if (val1.isNull())
return emulateBranch(1, false);
else if (val1.isObject() || val1.isString() || val1.isBoxed())
return emulateBranch(1, true);
else
return false;
}

11
blocks/cflow/InstructionEmulator.cs
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@ -385,6 +385,12 @@ namespace de4dot.blocks.cflow {
case Code.Ldfld: emulate_Ldfld(instr); break;
case Code.Ldsfld: emulate_Ldsfld(instr); break;
case Code.Ldftn: valueStack.push(new ObjectValue(instr.Operand)); break;
case Code.Ldsflda: valueStack.push(new ObjectValue(instr.Operand)); break;
case Code.Ldtoken: valueStack.push(new ObjectValue(instr.Operand)); break;
case Code.Ldvirtftn:valueStack.pop(); valueStack.push(new ObjectValue()); break;
case Code.Ldflda: valueStack.pop(); valueStack.push(new ObjectValue()); break;
case Code.Unbox:
case Code.Conv_R_Un:
@ -440,16 +446,11 @@ namespace de4dot.blocks.cflow {
case Code.Ldelem_R4:
case Code.Ldelem_R8:
case Code.Ldelem_Ref:
case Code.Ldflda:
case Code.Ldftn:
case Code.Ldind_I:
case Code.Ldind_R4:
case Code.Ldind_R8:
case Code.Ldind_Ref:
case Code.Ldobj:
case Code.Ldsflda:
case Code.Ldtoken:
case Code.Ldvirtftn:
case Code.Leave:
case Code.Leave_S:
case Code.Localloc:

22
blocks/cflow/Value.cs
View File

@ -21,6 +21,7 @@ namespace de4dot.blocks.cflow {
public enum ValueType : byte {
Unknown,
Null,
Object,
Boxed,
Int32,
Int64,
@ -45,6 +46,10 @@ namespace de4dot.blocks.cflow {
return valueType == ValueType.Null;
}
public bool isObject() {
return valueType == ValueType.Object;
}
public bool isBoxed() {
return valueType == ValueType.Boxed;
}
@ -80,6 +85,23 @@ namespace de4dot.blocks.cflow {
}
}
public class ObjectValue : Value {
public readonly object obj; // can be null but that doesn't mean that this ObjectValue instance is null
public ObjectValue()
: this(null) {
}
public ObjectValue(object obj)
: base(ValueType.Object) {
this.obj = obj;
}
public override string ToString() {
return "<non-null object>";
}
}
public class NullValue : Value {
// There's only one type of null
public static readonly NullValue Instance = new NullValue();