Error when compiling on iOS

[intentor]

When building to iOS, the following error occurs with Adic 2.9:

ExecutionEngineException: Attempting to JIT compile method '(wrapper dynamic-method) Adic.InjectionContainer:InjectionContainer ()' while running with --aot-only.

  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, Boolean throwOnBindFailure) [0x00000] in <filename unknown>:0 
  at System.Delegate.CreateDelegate (System.Type type, System.Reflection.MethodInfo method, Boolean throwOnBindFailure) [0x00000] in <filename unknown>:0 
  at System.Delegate.CreateDelegate (System.Type type, System.Reflection.MethodInfo method) [0x00000] in <filename unknown>:0 
  at System.Reflection.Emit.DynamicMethod.CreateDelegate (System.Type delegateType) [0x00000] in <filename unknown>:0 
  at Adic.Util.MethodUtils.CreateConstructor (System.Type type, System.Reflection.ConstructorInfo constructor) [0x00000] in <filename unknown>:0 
  at Adic.Cache.ReflectionFactory.Create (System.Type type) [0x00000] in <filename unknown>:0 
  at Adic.Cache.ReflectionCache.Add (System.Type type) [0x00000] in <filename unknown>:0 
  at Adic.Cache.ReflectionCache.GetClass (System.Type type) [0x00000] in <filename unknown>:0 
  at Adic.Injection.Injector.Inject (System.Object instance) [0x00000] in <filename unknown>:0 
  at Adic.Injection.Injector.OnBeforeAddBinding (IBinder source, Adic.Binding.BindingInfo& binding) [0x00000] in <filename unknown>:0 
  at Adic.Binding.Binder.AddBinding (Adic.Binding.BindingInfo binding) [0x00000] in <filename unknown>:0 
  at Adic.Binding.BindingFactory.AddBinding (System.Object value, BindingInstance instanceType) [0x00000] in <filename unknown>:0 
  at Adic.Binding.BindingFactory.To (System.Type type, System.Object instance) [0x00000] in <filename unknown>:0 
  at Adic.Binding.BindingFactory.To[InjectionContainer] (Adic.InjectionContainer instance) [0x00000] in <filename unknown>:0 
  at Adic.InjectionContainer.RegisterItself () [0x00000] in <filename unknown>:0 
  at Adic.InjectionContainer..ctor () [0x00000] in <filename unknown>:0 
  at MastersOfConquest.GameRoot.SetupContainers () [0x00000] in <filename unknown>:0 
  at Adic.ContextRoot.Awake () [0x00000] in <filename unknown>:0 

Using the 2.7 version works fine.

Issue happens on iPhone 6, iOS 8.3.

[intentor]

The link http://developer.xamarin.com/guides/ios/advanced_topics/limitations/ points out that dynamic code generation is not supported on iOS, which is probably causing the error.

[masterial]

I am using callbacks to refer to a command from one of my functions in GameController. Seems like 2.9 has some issues with that and 2.7 does not. However, I am not sure exactly if that's the issue.

On May 7, 2015, at 4:57 PM, intentor notifications@github.com wrote:

The link http://developer.xamarin.com/guides/ios/advanced_topics/limitations/ http://developer.xamarin.com/guides/ios/advanced_topics/limitations/ points out that dynamic code generation is not supported on iOS, which is probably causing the error.

—
Reply to this email directly or view it on GitHub #16 (comment).

[intentor]

As far as I can tell, the problem seems to be related to the dynamic code generation (which is not available on iOS) used on the caching system.

I'm looking into ways of achieving the current performance with other techniques rather than direct reflection call.

[intentor]

Looks like compiled lambda expressions can run just fine on iOS (http://stackoverflow.com/questions/29245589/why-does-lambdaexpression-compile-work-on-ios-xamarin and http://stackoverflow.com/questions/24977939/what-does-expression-compile-do-on-monotouch). Maybe the solution will be to switch to them.

[intentor]

From the Mono docs, even Expression.Compile() seems not to work on iOS builds because of the AOT compilation: http://www.mono-project.com/docs/advanced/aot/.