public void VisitMethodCall(MethodBase originatingMethod,
int ilOffsetOfCall,
MethodBase calledMethod,
int referencingMethodId,
int referencingClassId)
{
var targetClassId = 0;
var limitedReference = false;
// do not collect members of foreign assemblies
var topReferencedType = calledMethod.GetTopmostNonGeneratedType();
if (typeHandler.ShouldCollectType(topReferencedType))
{
targetClassId = typeHandler.AddToDbIfValid(topReferencedType);
}
if (targetClassId == 0 && GlobalOptions.CollectAllInvocations)
{
targetClassId = typeHandler.AddToDb(topReferencedType, true);
limitedReference = true;
}
// check, if this is an async method
if (calledMethod.DeclaringType.IsAsyncStateMachineOf(originatingMethod, out var asyncWorker))
{
// dive into the async worker, as that is where the "meat" of the method is
ParseMethod?.Invoke(this, new CollectedMethodEventArgs(new CollectedMethod(asyncWorker, referencingMethodId, referencingClassId)));
}
// collect method parameters
// note that we just assume the parameters are used, e.g. the code may actually pass null as an argument
// to get this right, we would have to look at the actual arguments, that get passed to the method
// this is a bit more involved, maybe something for a future version...
// (i think, i'll leave it this way, the value passed may be a parameter itself, so we can never be sure in these cases)
foreach (var mParam in calledMethod.GetParameters())
{
var paramTypeId = typeHandler.AddToDbIfValid(mParam.ParameterType);
if (paramTypeId > 0 && paramTypeId != referencingClassId) // ignore self-references (e.g. when passing "this" as a parameter)
{
dataCollector.CollectReference(referencingClassId, paramTypeId, ReferenceKind.REFERENCE_TYPE_USAGE);
var refId = dataCollector.CollectReference(referencingMethodId, paramTypeId, ReferenceKind.REFERENCE_TYPE_USAGE);
CollectReferenceLocation(originatingMethod, refId, ilOffsetOfCall);
}
}
if (targetClassId > 0)
{
if (referencingClassId != targetClassId) // ignore self-references
{
dataCollector.CollectReference(referencingClassId, targetClassId, ReferenceKind.REFERENCE_TYPE_USAGE);
var refId = dataCollector.CollectReference(referencingMethodId, targetClassId, ReferenceKind.REFERENCE_TYPE_USAGE);
CollectReferenceLocation(originatingMethod, refId, ilOffsetOfCall);
}
var targetMethodId = typeHandler.CollectMember(calledMethod, limitedReference, out var targetKind);
if (targetMethodId > 0)
{
var refId = dataCollector.CollectReference(referencingMethodId, targetMethodId,
targetKind == SymbolKind.SYMBOL_METHOD ? ReferenceKind.REFERENCE_CALL : ReferenceKind.REFERENCE_USAGE);
CollectReferenceLocation(originatingMethod, refId, ilOffsetOfCall);
}
// if target is an interface, link to implementors as well
// (seems to be consistent with behavior of VS 2019 when looking at references)
List <Type> implementors = new List <Type>();
if (calledMethod.DeclaringType.IsInterface)
{
implementors.AddRange(typeHandler.GetInterfaceImplementors(calledMethod.DeclaringType));
}
foreach (var implementor in implementors)
{
var implTypeId = typeHandler.AddToDbIfValid(implementor);
if (implTypeId > 0)
{
dataCollector.CollectReference(referencingClassId, implTypeId, ReferenceKind.REFERENCE_TYPE_USAGE);
var refId = dataCollector.CollectReference(referencingMethodId, implTypeId, ReferenceKind.REFERENCE_TYPE_USAGE);
CollectReferenceLocation(originatingMethod, refId, ilOffsetOfCall);
}
foreach (var implMethod in implementor.GetMethods(flags))
{
// use correct overload
if (implMethod.Name == calledMethod.Name && implMethod.HasSameParameters(calledMethod))
{
var implMethodId = typeHandler.CollectMember(implMethod, limitedReference, out var targetImplKind);
var refId = dataCollector.CollectReference(referencingMethodId, implMethodId,
targetImplKind == SymbolKind.SYMBOL_METHOD ? ReferenceKind.REFERENCE_CALL : ReferenceKind.REFERENCE_USAGE);
CollectReferenceLocation(originatingMethod, refId, ilOffsetOfCall);
break;
}
}
}
}
}
public int AddToDb(Type type, bool skipMembers = false)
{
if (!Cache.Namespaces.TryGetValue(type.Namespace, out _))
{
var nsId = dataCollector.CollectSymbol(type.Namespace, SymbolKind.SYMBOL_NAMESPACE);
Cache.Namespaces.Add(type.Namespace, nsId);
}
var name = type.GetPrettyName();
if (name == null)
{
return(0);
}
var kind = SymbolKind.SYMBOL_CLASS;
if (type.IsEnum)
{
kind = SymbolKind.SYMBOL_ENUM;
}
else if (type.IsInterface)
{
kind = SymbolKind.SYMBOL_INTERFACE;
}
else if (type.IsGenericTypeDefinition)
{
kind = SymbolKind.SYMBOL_TYPEDEF;
}
// if class inherits from Attribute, treat as annotation
if (typeof(Attribute).IsAssignableFrom(type))
{
kind = SymbolKind.SYMBOL_ANNOTATION;
}
var classId = dataCollector.CollectSymbol(name, kind);
if (classId > 0 && !skipMembers)
{
foreach (var genType in type.GetGenericArguments())
{
var genTypeId = AddToDbIfValid(genType);
if (genTypeId > 0)
{
dataCollector.CollectReference(classId, genTypeId, ReferenceKind.REFERENCE_TYPE_ARGUMENT);
}
}
if (type.IsGenericType && !type.IsGenericTypeDefinition)
{
var genBaseType = type.GetGenericTypeDefinition();
var baseTypeId = AddToDbIfValid(genBaseType);
if (baseTypeId > 0)
{
dataCollector.CollectReference(classId, baseTypeId, ReferenceKind.REFERENCE_TEMPLATE_SPECIALIZATION);
}
}
// do not collect members for types from foreign assemblies unless they match the specified filter
if (ShouldCollectType(type))
{
CollectTypeMembers(type, classId);
}
}
return(classId);
}