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#110: Made type lookup more robust. Fixed exception on .NET Standard … #111

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merged 5 commits into from Oct 16, 2017
Merged

#110: Made type lookup more robust. Fixed exception on .NET Standard … #111

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5e512e4
#110: Made type lookup more robust. Fixed exception on .NET Standard …
mstyura Oct 11, 2017
edfc210
#110: Extracted type load function.
mstyura Oct 13, 2017
7fa693f
#110: Properly handle types moved to other assembly via TypeForwarded…
mstyura Oct 14, 2017
d88bc30
#110: Removed unused namespace.
mstyura Oct 14, 2017
2bdc6c8
#110: Use embedded methods for logging instead of Debug.WriteLine.
mstyura Oct 14, 2017
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53 changes: 29 additions & 24 deletions Common/SystemTypesResolver.cs
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@@ -1,3 +1,5 @@
using System;
using System.Diagnostics;
using System.Linq;
using Mono.Cecil;

Expand All @@ -15,18 +17,14 @@ public partial class ModuleWeaver
public void LoadSystemTypes()
{
var mscorlib = AssemblyResolver.Resolve(new AssemblyNameReference("mscorlib", null));
var typeType = mscorlib?.MainModule.Types.FirstOrDefault(x => x.Name == "Type");
if (typeType == null)
{
var runtime = AssemblyResolver.Resolve(new AssemblyNameReference("System.Runtime",null));
typeType = runtime.MainModule.Types.First(x => x.Name == "Type");
}
var funcDefinition = typeType.Module.Types.FirstOrDefault(x => x.Name == "Func`1");
if (funcDefinition == null)
{
var core = AssemblyResolver.Resolve(new AssemblyNameReference("System.Core", null));
funcDefinition = core.MainModule.Types.First(x => x.Name == "Func`1");
}
var netstandard = AssemblyResolver.Resolve(new AssemblyNameReference("netstandard", null));
var runtime = AssemblyResolver.Resolve(new AssemblyNameReference("System.Runtime", null));
var core = AssemblyResolver.Resolve(new AssemblyNameReference("System.Core", null));

var typeType = LoadTypeDefinition("System.Type", mscorlib, netstandard, runtime, core);

var funcDefinition = LoadTypeDefinition("System.Func`1", mscorlib, netstandard, runtime, core);

var genericInstanceType = new GenericInstanceType(funcDefinition);
genericInstanceType.GenericArguments.Add(ModuleDefinition.TypeSystem.String);
GenericFunc = ModuleDefinition.ImportReference(genericInstanceType);
Expand All @@ -41,24 +39,31 @@ public void LoadSystemTypes()
GetTypeFromHandle = ModuleDefinition.ImportReference(GetTypeFromHandle);


var stringType = mscorlib?.MainModule.Types.FirstOrDefault(x => x.Name == "String");
if (stringType == null)
{
var runtime = AssemblyResolver.Resolve(new AssemblyNameReference("System.Runtime", null));
stringType = runtime.MainModule.Types.First(x => x.Name == "String");
}
var stringType = LoadTypeDefinition("System.String", mscorlib, netstandard, runtime, core);

ConcatMethod = ModuleDefinition.ImportReference(stringType.FindMethod("Concat", "String", "String"));
FormatMethod = ModuleDefinition.ImportReference(stringType.FindMethod("Format", "String", "Object[]"));
ObjectArray = new ArrayType(ModuleDefinition.TypeSystem.Object);

var exceptionType = mscorlib?.MainModule.Types.FirstOrDefault(x => x.Name == "Exception");
if (exceptionType == null)
{
var runtime = AssemblyResolver.Resolve(new AssemblyNameReference("System.Runtime",null));
exceptionType = runtime.MainModule.Types.First(x => x.Name == "Exception");
}
var exceptionType = LoadTypeDefinition("System.Exception", mscorlib, netstandard, runtime, core);
ExceptionType = ModuleDefinition.ImportReference(exceptionType);

}

private static TypeDefinition LoadTypeDefinition(
string typeFullName,
params AssemblyDefinition[] canidateAssemblies)
{
foreach (var candidateAssembly in canidateAssemblies)
{
var typeDef = candidateAssembly?.MainModule.Types.FirstOrDefault(x => x.FullName == typeFullName);
if (typeDef != null)
{
Debug.WriteLine("Loaded type {0} from {1}", typeDef.FullName, typeDef.Module.FileName);
return typeDef;
}
}
throw new WeavingException($"Unable to find {typeFullName} among [{String.Join(", ", canidateAssemblies.OfType<AssemblyDefinition>())}]");
}

}