private static MethodInfo GetCustomFunc <T1, T2, T3>(Func <T1, T2, T3> target)
{
var method = target.Method;
var body = method.GetMethodBody();
var locals = body.LocalVariables.OrderBy(x => x.LocalIndex).ToList();
var resolver = new ILInstructionResolver(method);
switch (method.Name)
{
case nameof(TestMethods.Add_Ovf):
case nameof(TestMethods.Add_Ovf_Un):
{
var instructions = ILInstructionReader.FromMethod(method);
var parsed = Enum.TryParse <ILOpCodeValues>(method.Name, out ILOpCodeValues result);
var opCode = OpCodeLookup.GetILOpcode((int)result);
instructions[2] = new ILInstruction()
{
OpCode = opCode
};
var compiled = ILEngineOpCodeTestMethodCompiler.CompileMethod(opCode, method, (gen) =>
{
locals.ForEach(x => gen.DeclareLocal(x.LocalType));
instructions.ForEach(x => x.Emit(gen, resolver));
});
return(method);
}
default: throw new NotImplementedException();
}
}
private ILOpCodeValues[] RunAndTest <T>(MethodInfo method, T expected, object[] parameters, Func <T, T, bool> comparer)
{
var result = ILInstructionReader
.FromMethod(method)
.Select(x => (ILOpCodeValues)x.OpCode.Value).ToArray();
bool invokedResult = false;
Exception caughtCompiled = null;
T invocationResult = default;
try
{
invocationResult = (T)method.Invoke(null, parameters);
invokedResult = comparer(expected, invocationResult);
}
catch (Exception ex)
{
caughtCompiled = ex.InnerException;
}
var engineResult = false;
Exception caughtEngine = null;
try
{
var frame = new TStackFrame();
frame.CopyFrom(method);
frame.Args = parameters;
engine.ExecuteFrame(frame);
//var actualEngine = engine.ExecuteTyped<T>(method, parameters);
if (!(frame.ReturnResult is T tresult))
{
if (frame.ReturnResult is IConvertible tConvertible)
{
frame.ReturnResult = Convert.ChangeType(tConvertible, typeof(T));
}
else
{
frame.ReturnResult = (T)frame.ReturnResult;
}
}
var actualEngine = (T)frame.ReturnResult;
engineResult = comparer(expected, actualEngine);
}
catch (Exception ex)
{
caughtEngine = ex;
}
if (caughtCompiled is null && caughtEngine is null)
{
Assert.IsTrue(invokedResult == engineResult);
}
void TestFromMethod(Func <MethodInfo> mResolver, OperandType operandType)
{
var method = mResolver();
Assert.IsNotNull(method, "Failed to resolve test method");
var expected = method.Invoke(null, Type.EmptyTypes);
var instructions = ILInstructionReader.FromMethod(method);
var frame = Build(instructions);
frame.CopyFrom(method);
ExecuteAndAssertResult(frame, expected, operandType);
}
public void TestReadInlineBrTarget()
{
var builder = new ILInstructionBuilder();
builder.Write(ILInstruction.Create(ILOpCodeValues.Br, 0));
builder.Write(ILOpCodeValues.Ldc_I8, 1L);
builder.Write(ILOpCodeValues.Ret);
var ilMethod = new Models.ILMethod(MethodBase.GetCurrentMethod().Name, typeof(long));
ilMethod.AddInstructions(builder.Instructions.ToArray());
var method = ilMethod.Compile();
var expected = method.Invoke(null, Type.EmptyTypes);
var instructions = ILInstructionReader.FromMethod(method);
ExecuteAndAssertResult(instructions, expected, OperandType.InlineBrTarget);
}
public void ExecuteTest()
{
var frame = new ILStackFrameWithDiagnostics();
Action empty = () => { };
var instructions = ILInstructionReader.FromMethod(empty.Method);
frame.Stream = instructions;
frame.SetResolver(empty.Method);
frame.Execute();
Assert.IsNull(frame.ReturnResult);
Assert.IsNull(frame.Exception);
Assert.IsTrue(frame.Module.MetadataToken == empty.Method.Module.MetadataToken);
var thisType = this.GetType();
var testMethod = thisType.GetMethod(nameof(ExecuteTest));
Assert.IsNotNull(testMethod);
var methodSigToken = testMethod.GetMethodBody().LocalSignatureMetadataToken;
Assert.IsTrue(methodSigToken >0);
var resolvedSig = frame.ResolveSignatureToken(methodSigToken);
Assert.IsNotNull(resolvedSig);
Assert.IsTrue(resolvedSig.Length > 0);
frame.Execute(1);
Assert.IsNull(frame.ReturnResult);
Assert.IsNull(frame.Exception);
Action sleepToLong = () => System.Threading.Thread.Sleep(4000);
instructions = ILInstructionReader.FromMethod(sleepToLong.Method);
frame.Stream = instructions;
frame.Execute(1);
Assert.IsNull(frame.ReturnResult);
Assert.IsNotNull(frame.Exception);
Assert.IsInstanceOfType(frame.Exception, typeof(ActionTimeoutException));
Action throwException = () => throw new ArgumentException(nameof(throwException));
instructions = ILInstructionReader.FromMethod(throwException.Method);
frame.Stream = instructions;
frame.Execute(1);
Assert.IsNull(frame.ReturnResult);
Assert.IsNotNull(frame.Exception);
Assert.IsInstanceOfType(frame.Exception, typeof(ArgumentException));
}
protected ILOpCodeValues[] CompileAndRun <T>(OpCode opCode, MethodInfo srcMethod, T expected, object[] parameters, Func <T, T, bool> comparer)
{
var methodParameters = srcMethod.GetParameters();
var body = srcMethod.GetMethodBody();
var locals = body.LocalVariables.OrderBy(x => x.LocalIndex).ToList();
var parameterTypes = methodParameters.Select(x => x.ParameterType).ToArray();
var instructions = ILInstructionReader.FromMethod(srcMethod);
if (opCode != OpCodes.Arglist)
{
Assert.IsTrue(instructions.Any(x => x.OpCode == opCode), $"Opcode {opCode} missing from compiled method");
}
var result = ILInstructionReader
.FromMethod(srcMethod)
.Select(x => (ILOpCodeValues)x.OpCode.Value).ToArray();
var resolver = new ILInstructionResolver(srcMethod);
Action <ILGenerator> emitAction = (gen) =>
{
locals.ForEach(x => gen.DeclareLocal(x.LocalType));
instructions.ForEach(x => x.Emit(gen, resolver));
};
MethodInfo method = null;
try
{
method = ILEngineOpCodeTestMethodCompiler.CompileMethod(opCode, typeof(T), parameterTypes, emitAction);
}
catch (Exception ex)
{
Assert.Fail("Failed to compile method:", ex.Message);
return(null);
}
return(RunAndTest <T>(method, expected, parameters, comparer));
}
public void TestEmitCompiledSwitch()
{
var compiledType = BuildSwitchTestType();
var compiledMethod = compiledType.GetMethod("SwitchTest");
Assert.IsNotNull(compiledMethod);
var compiledInstructions = ILInstructionReader.FromMethod(compiledMethod).ToArray();
//TODO: auto label read instructions.
//mark default case jump target
compiledInstructions[7].Label = 0;
//set default case jump target
compiledInstructions[2].Arg = compiledInstructions[7];
// set break target;
compiledInstructions[8].Label = 1;
//set jump targets for switch breaks statements
compiledInstructions[4].Arg = compiledInstructions[6].Arg = compiledInstructions[8];
//mark switch jump targets;
compiledInstructions[3].Label = 2;
compiledInstructions[5].Label = 3;
//set switch jump targets =
compiledInstructions[1].Arg = new[] { compiledInstructions[3], compiledInstructions[5] };
var builder = new ILInstructionBuilder();
builder.Write(compiledInstructions.ToArray());
//TODO: implement auto fixup of instuctions.
var frame = ILStackFrameBuilder.Build(builder.Instructions);
frame.Args = new object[] { 1 };
frame.Reset();
int Position = -1;
var jumpTable = frame.Stream.ToDictionary(x => (int)x.ByteIndex, x => ++ Position);
frame.Execute();
var expected = 1;
Assert.IsNull(frame.Exception, $"Executing switch: add throw an exception {frame?.Exception}");
Assert.IsTrue(frame.Stack.Count == 0, "Stack was not cleared executing switch: add");
Assert.IsTrue((int)frame.ReturnResult == expected, $"Actual: {frame.ReturnResult}\r\nExpected: {expected}");
frame.Args = new object[] { 0 };
frame.Execute();
expected = 0;
Assert.IsNull(frame.Exception, $"Executing switch: add throw an exception {frame?.Exception}");
Assert.IsTrue(frame.Stack.Count == 0, "Stack was not cleared executing switch: add");
Assert.IsTrue((int)frame.ReturnResult == expected, $"Actual: {frame.ReturnResult}\r\nExpected: {expected}");
frame.Args = new object[] { 2 };
frame.Execute();
expected = 2;
Assert.IsNull(frame.Exception, $"Executing switch: add throw an exception {frame?.Exception}");
Assert.IsTrue(frame.Stack.Count == 0, "Stack was not cleared executing switch: add");
Assert.IsTrue((int)frame.ReturnResult == expected, $"Actual: {frame.ReturnResult}\r\nExpected: {expected}");
}
public ILSearchResult(MethodInfo method)
{
Method = method;
this.Instructions = ILInstructionReader.FromMethod(method);
}