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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Reflection.Metadata;
using System.Reflection.PortableExecutable;
using System.Resources;
using Internal.IL;
using Internal.TypeSystem;
using Internal.TypeSystem.Ecma;
namespace ILVerify
{
public class Verifier
{
private Lazy<ResourceManager> _stringResourceManager =
new Lazy<ResourceManager>(() => new ResourceManager("FxResources.ILVerification.SR", typeof(Verifier).GetTypeInfo().Assembly));
private ILVerifyTypeSystemContext _typeSystemContext;
public Verifier(IResolver resolver)
{
_typeSystemContext = new ILVerifyTypeSystemContext(resolver);
}
internal Verifier(ILVerifyTypeSystemContext context)
{
_typeSystemContext = context;
}
public void SetSystemModuleName(AssemblyName name)
{
PEReader peReader = _typeSystemContext._resolver.Resolve(name.Name);
if (peReader is null)
{
throw new VerifierException("Assembly or module not found: " + name.FullName);
}
_typeSystemContext.SetSystemModule(_typeSystemContext.GetModule(peReader));
}
internal EcmaModule GetModule(PEReader peReader)
{
return _typeSystemContext.GetModule(peReader);
}
public IEnumerable<VerificationResult> Verify(PEReader peReader)
{
if (peReader == null)
{
throw new ArgumentNullException(nameof(peReader));
}
if (_typeSystemContext.SystemModule == null)
{
ThrowMissingSystemModule();
}
IEnumerable<VerificationResult> results;
try
{
EcmaModule module = GetModule(peReader);
results = VerifyMethods(module, module.MetadataReader.MethodDefinitions);
}
catch (VerifierException e)
{
results = new[] { new VerificationResult() { Message = e.Message } };
}
foreach (var result in results)
{
yield return result;
}
}
public IEnumerable<VerificationResult> Verify(PEReader peReader, TypeDefinitionHandle typeHandle)
{
if (peReader == null)
{
throw new ArgumentNullException(nameof(peReader));
}
if (typeHandle.IsNil)
{
throw new ArgumentNullException(nameof(typeHandle));
}
if (_typeSystemContext.SystemModule == null)
{
ThrowMissingSystemModule();
}
IEnumerable<VerificationResult> results;
try
{
EcmaModule module = GetModule(peReader);
TypeDefinition typeDef = peReader.GetMetadataReader().GetTypeDefinition(typeHandle);
results = VerifyMethods(module, typeDef.GetMethods());
}
catch (VerifierException e)
{
results = new[] { new VerificationResult() { Message = e.Message } };
}
foreach (var result in results)
{
yield return result;
}
}
public IEnumerable<VerificationResult> Verify(PEReader peReader, MethodDefinitionHandle methodHandle)
{
if (peReader == null)
{
throw new ArgumentNullException(nameof(peReader));
}
if (methodHandle.IsNil)
{
throw new ArgumentNullException(nameof(methodHandle));
}
if (_typeSystemContext.SystemModule == null)
{
ThrowMissingSystemModule();
}
IEnumerable<VerificationResult> results;
try
{
EcmaModule module = GetModule(peReader);
results = VerifyMethods(module, new[] { methodHandle });
}
catch (VerifierException e)
{
results = new[] { new VerificationResult() { Message = e.Message } };
}
foreach (var result in results)
{
yield return result;
}
}
private IEnumerable<VerificationResult> VerifyMethods(EcmaModule module, IEnumerable<MethodDefinitionHandle> methodHandles)
{
foreach (var methodHandle in methodHandles)
{
var method = (EcmaMethod)module.GetMethod(methodHandle);
var methodIL = EcmaMethodIL.Create(method);
if (methodIL != null)
{
var results = VerifyMethod(module, methodIL, methodHandle);
foreach (var result in results)
{
yield return result;
}
}
}
}
private IEnumerable<VerificationResult> VerifyMethod(EcmaModule module, MethodIL methodIL, MethodDefinitionHandle methodHandle)
{
var builder = new ArrayBuilder<VerificationResult>();
MethodDesc method = methodIL.OwningMethod;
try
{
var importer = new ILImporter(method, methodIL);
importer.ReportVerificationError = (args) =>
{
var codeResource = _stringResourceManager.Value.GetString(args.Code.ToString(), CultureInfo.InvariantCulture);
builder.Add(new VerificationResult()
{
Method = methodHandle,
Error = args,
Message = string.IsNullOrEmpty(codeResource) ? args.Code.ToString() : codeResource
});
};
importer.Verify();
}
catch (VerificationException)
{
// a result was reported already (before aborting)
}
catch (BadImageFormatException)
{
builder.Add(new VerificationResult()
{
Method = methodHandle,
Message = "Unable to resolve token"
});
}
catch (NotImplementedException e)
{
reportException(e);
}
catch (InvalidProgramException e)
{
reportException(e);
}
catch (PlatformNotSupportedException e)
{
reportException(e);
}
catch (VerifierException e)
{
reportException(e);
}
catch (TypeSystemException e)
{
reportException(e);
}
return builder.ToArray();
void reportException(Exception e)
{
builder.Add(new VerificationResult()
{
Method = methodHandle,
Message = e.Message
});
}
}
private void ThrowMissingSystemModule()
{
throw new VerifierException("No system module specified");
}
}
}
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