private static int EstimateSizeOfPush(Instruction instruction, MethodDefinition method)
{
TypeReference GetParameterType(MethodDefinition m, int index)
{
if (!m.IsStatic)
{
if (index == 0)
{
return(m.DeclaringType);
}
index -= 1;
}
return(m.Parameters[index].ParameterType);
}
int GetSize(TypeReference t) => TypeSizeCalculator.GetSize(t);
switch (instruction.OpCode.Code)
{
case Code.Ldarg_0: return(GetSize(GetParameterType(method, 0)));
case Code.Ldarg_1: return(GetSize(GetParameterType(method, 1)));
case Code.Ldarg_2: return(GetSize(GetParameterType(method, 2)));
case Code.Ldarg_3: return(GetSize(GetParameterType(method, 3)));
case Code.Ldloc_0: return(GetSize(method.Body.Variables[0].VariableType));
case Code.Ldloc_1: return(GetSize(method.Body.Variables[1].VariableType));
case Code.Ldloc_2: return(GetSize(method.Body.Variables[2].VariableType));
case Code.Ldloc_3: return(GetSize(method.Body.Variables[3].VariableType));
}
switch (instruction.Operand)
{
case FieldReference f: return(GetSize(f.FieldType));
case MethodReference m: return(GetSize(m.ReturnType));
case VariableDefinition v: return(GetSize(v.VariableType));
case ParameterDefinition p: return(GetSize(p.ParameterType));
case object o when o != null && o.GetType().IsPrimitive: return(Marshal.SizeOf(o));
default: return(sizeof(long)); // estimate
}
}
public void ValidateLocals(MethodDefinition method)
{
if (!method.HasBody)
{
return;
}
var size = 0;
foreach (var local in method.Body.Variables)
{
size += TypeSizeCalculator.GetSize(local.VariableType);
}
if (size > _settings.MethodLocalsSizeLimit)
{
throw new AssemblyGuardException($"Size of locals in method {method} exceeds allowed limit.");
}
}
public void Has_correct_size()
{
var actualSize = TypeSizeCalculator.GetSize <Vertex3V>();
_vertex3V.SizeInBytes.Should().Be(actualSize);
}
