private static void DetourMethodByAttribute(MemberInfo info, Attribute attrib)
{
var detourAttribute = attrib as DetourMethodAttribute;
var destination = info as MethodInfo;
if (destination == null || detourAttribute == null)
{
throw new Exception("Null or unexpected argument types!");
}
var pair = new DetourPair();
try {
try {
pair = GetDetourPairFromAttribute(detourAttribute, destination);
DetourProvider.CompatibleDetourWithExceptions(pair.source, pair.destination);
} catch (Exception e) {
DetourProvider.ThrowClearerDetourException(e, pair.source, info, "method");
}
} catch (Exception e) {
if (!TryCallDetourFallbackHandler(pair.source, destination, e))
{
HugsLibController.Logger.ReportException(e);
}
}
}
private static bool TryCallDetourFallbackHandler(MethodInfo attemptedSource, MemberInfo attemptedDestination, Exception detourException)
{
if (attemptedDestination.DeclaringType == null)
{
return(false);
}
// find a matching handler method
var handlers = attemptedDestination.DeclaringType.GetMethods(AllBindingFlags).Where(m => m.TryGetAttributeSafely <DetourFallbackAttribute>() != null);
MethodInfo matchingHandler = null;
foreach (var handler in handlers)
{
var attribute = handler.TryGetAttributeSafely <DetourFallbackAttribute>();
if (attribute == null || (attribute.targetMemberNames.Length > 0 && !attribute.targetMemberNames.Contains(attemptedDestination.Name)))
{
continue;
}
matchingHandler = handler;
break;
}
if (matchingHandler == null)
{
return(false);
}
// try get the method the detour was already routed to
MethodInfo existingDestination = null;
if (attemptedSource != null)
{
existingDestination = DetourProvider.TryGetExistingDetourDestination(attemptedSource);
}
// call the handler
try {
matchingHandler.Invoke(null, new object[] { attemptedDestination, existingDestination, detourException });
return(true);
} catch (Exception e) {
HugsLibController.Logger.Error("Exception while invoking detour fallback handler: {0} Exception was: {1}", matchingHandler.FullName(), e);
}
return(false);
}
private static void ExplainFailure(string errorMessage, MethodInfo sourceMethod, MethodInfo destinationMethod)
{
failReason = string.Format("Dangerous detour detected! {0}. Reason: {1}",
DetourProvider.DetourPairToString(sourceMethod, destinationMethod), errorMessage);
}