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Runtime.cs
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//
// Runtime.cs: Mac/iOS shared runtime code
//
// Authors:
// Miguel de Icaza
//
// Copyright 2013 Xamarin Inc.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Foundation;
using Registrar;
#if MONOMAC
using AppKit;
#endif
namespace ObjCRuntime {
public partial class Runtime {
#if !COREBUILD
#if XAMCORE_2_0
internal const bool IsUnifiedBuild = true;
#else
internal const bool IsUnifiedBuild = false;
#endif
static Dictionary<IntPtrTypeValueTuple,Delegate> block_to_delegate_cache;
static Dictionary<Type, ConstructorInfo> intptr_ctor_cache;
static Dictionary<Type, ConstructorInfo> intptr_bool_ctor_cache;
static List <object> delegates;
static List <Assembly> assemblies;
static Dictionary <IntPtr, WeakReference> object_map;
static object lock_obj;
static IntPtr NSObjectClass;
static bool initialized;
internal static IntPtrEqualityComparer IntPtrEqualityComparer;
internal static TypeEqualityComparer TypeEqualityComparer;
internal static DynamicRegistrar Registrar;
internal const uint INVALID_TOKEN_REF = 0xFFFFFFFF;
internal unsafe struct MTRegistrationMap {
public IntPtr assembly;
public MTClassMap *map;
public IntPtr full_token_references; /* array of MTFullTokenReference */
public MTManagedClassMap* skipped_map;
public MTProtocolWrapperMap* protocol_wrapper_map;
public MTProtocolMap protocol_map;
public int assembly_count;
public int map_count;
public int full_token_reference_count;
public int skipped_map_count;
public int protocol_wrapper_count;
public int protocol_count;
}
[Flags]
internal enum MTTypeFlags : uint
{
None = 0,
CustomType = 1,
UserType = 2,
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal struct MTClassMap {
public IntPtr handle;
public uint type_reference;
public MTTypeFlags flags;
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal struct MTManagedClassMap
{
public uint skipped_reference; // implied token type: TypeDef
public uint actual_reference; // implied token type: TypeDef
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal struct MTProtocolWrapperMap {
public uint protocol_token;
public uint wrapper_token;
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal unsafe struct MTProtocolMap {
public uint* protocol_tokens;
public IntPtr* protocols;
}
/* Keep Delegates, Trampolines and InitializationOptions in sync with monotouch-glue.m */
internal struct Trampolines {
public IntPtr tramp;
public IntPtr stret_tramp;
public IntPtr fpret_single_tramp;
public IntPtr fpret_double_tramp;
public IntPtr release_tramp;
public IntPtr retain_tramp;
public IntPtr static_tramp;
public IntPtr ctor_tramp;
public IntPtr x86_double_abi_stret_tramp;
public IntPtr static_fpret_single_tramp;
public IntPtr static_fpret_double_tramp;
public IntPtr static_stret_tramp;
public IntPtr x86_double_abi_static_stret_tramp;
public IntPtr long_tramp;
public IntPtr static_long_tramp;
#if MONOMAC
public IntPtr copy_with_zone_1;
public IntPtr copy_with_zone_2;
#endif
public IntPtr get_gchandle_tramp;
public IntPtr set_gchandle_tramp;
}
[Flags]
internal enum InitializationFlags : int {
IsPartialStaticRegistrar= 0x01,
/* unused = 0x02,*/
DynamicRegistrar = 0x04,
/* unused = 0x08,*/
IsSimulator = 0x10,
}
#if MONOMAC
/* This enum must always match the identical enum in runtime/xamarin/main.h */
internal enum LaunchMode : int {
App = 0,
Extension = 1,
Embedded = 2,
}
#endif
[StructLayout (LayoutKind.Sequential)]
internal unsafe struct InitializationOptions {
public int Size;
public InitializationFlags Flags;
public Delegates *Delegates;
public Trampolines *Trampolines;
public MTRegistrationMap *RegistrationMap;
public MarshalObjectiveCExceptionMode MarshalObjectiveCExceptionMode;
public MarshalManagedExceptionMode MarshalManagedExceptionMode;
#if MONOMAC
public LaunchMode LaunchMode;
public IntPtr EntryAssemblyPath; /* char * */
#endif
IntPtr AssemblyLocations;
public bool IsSimulator {
get {
return (Flags & InitializationFlags.IsSimulator) == InitializationFlags.IsSimulator;
}
}
}
internal static unsafe InitializationOptions* options;
[BindingImpl (BindingImplOptions.Optimizable)]
public static bool DynamicRegistrationSupported {
get {
// The linker may turn calls to this property into a constant
return true;
}
}
internal static bool Initialized {
get { return initialized; }
}
#if MONOMAC
[DllImport (Constants.libcLibrary)]
static extern int _NSGetExecutablePath (byte[] buf, ref int bufsize);
#endif
[Preserve] // called from native - runtime.m.
[BindingImpl (BindingImplOptions.Optimizable)] // To inline the Runtime.DynamicRegistrationSupported code if possible.
unsafe static void Initialize (InitializationOptions* options)
{
#if PROFILE
var watch = new Stopwatch ();
#endif
if (options->Size != Marshal.SizeOf (typeof (InitializationOptions))) {
string msg = "Version mismatch between the native " + ProductName + " runtime and " + AssemblyName + ". Please reinstall " + ProductName + ".";
Console.Error.WriteLine (msg);
#if MONOMAC
try {
// Print out where Xamarin.Mac.dll and the native runtime was loaded from.
Console.Error.WriteLine (AssemblyName + " was loaded from {0}", typeof (nint).Assembly.Location);
var sym2 = Dlfcn.dlsym (Dlfcn.RTLD.Default, "xamarin_initialize");
Dlfcn.Dl_info info2;
if (Dlfcn.dladdr (sym2, out info2) == 0) {
Console.Error.WriteLine ("The native runtime was loaded from {0}", Marshal.PtrToStringAuto (info2.dli_fname));
} else if (Dlfcn.dlsym (Dlfcn.RTLD.MainOnly, "xamarin_initialize") != IntPtr.Zero) {
byte[] buf = new byte [128];
int length = buf.Length;
if (_NSGetExecutablePath (buf, ref length) == -1) {
Array.Resize (ref buf, length);
length = buf.Length;
if (_NSGetExecutablePath (buf, ref length) != 0) {
Console.Error.WriteLine ("Could not find out where the native runtime was loaded from.");
buf = null;
}
}
if (buf != null) {
var strlength = 0;
for (int i = 0; i < buf.Length && buf [i] != 0; i++)
strlength++;
Console.Error.WriteLine ("The native runtime was loaded from {0}", System.Text.Encoding.UTF8.GetString (buf, 0, strlength));
}
} else {
Console.Error.WriteLine ("Could not find out where the native runtime was loaded from.");
}
} catch {
// Just ignore any exceptions, the above code is just a debug help, and if it fails,
// any exception show to the user will likely confuse more than help
}
#endif
throw ErrorHelper.CreateError (8001, msg);
}
if (IntPtr.Size != sizeof (nint)) {
string msg = string.Format ("Native type size mismatch between " + AssemblyName + " and the executing architecture. " + AssemblyName + " was built for {0}-bit, while the current process is {1}-bit.",
IntPtr.Size == 4 ? "64" : "32", IntPtr.Size == 4 ? "32" : "64");
Console.Error.WriteLine (msg);
throw ErrorHelper.CreateError (8010, msg);
}
IntPtrEqualityComparer = new IntPtrEqualityComparer ();
TypeEqualityComparer = new TypeEqualityComparer ();
Runtime.options = options;
delegates = new List<object> ();
object_map = new Dictionary <IntPtr, WeakReference> (IntPtrEqualityComparer);
intptr_ctor_cache = new Dictionary<Type, ConstructorInfo> (TypeEqualityComparer);
intptr_bool_ctor_cache = new Dictionary<Type, ConstructorInfo> (TypeEqualityComparer);
lock_obj = new object ();
NSObjectClass = NSObject.Initialize ();
if (DynamicRegistrationSupported)
Registrar = new DynamicRegistrar ();
RegisterDelegates (options);
Class.Initialize (options);
#if !NET
// This is not needed for .NET 5:
// * https://github.com/xamarin/xamarin-macios/issues/7924#issuecomment-588331822
// * https://github.com/xamarin/xamarin-macios/issues/7924#issuecomment-589356481
Mono.SystemDependencyProvider.Initialize ();
#endif
InitializePlatform (options);
#if !XAMMAC_SYSTEM_MONO && !NET_TODO
// NET_TODO: https://github.com/dotnet/runtime/issues/32543
UseAutoreleasePoolInThreadPool = true;
#endif
IsARM64CallingConvention = GetIsARM64CallingConvention (); // Can only be done after Runtime.Arch is set (i.e. InitializePlatform has been called).
objc_exception_mode = options->MarshalObjectiveCExceptionMode;
managed_exception_mode = options->MarshalManagedExceptionMode;
initialized = true;
#if PROFILE
Console.WriteLine ("Runtime.Initialize completed in {0} ms", watch.ElapsedMilliseconds);
#endif
}
#if !XAMMAC_SYSTEM_MONO && !NET_TODO
// NET_TODO: https://github.com/dotnet/runtime/issues/32543
static bool has_autoreleasepool_in_thread_pool;
public static bool UseAutoreleasePoolInThreadPool {
get {
return has_autoreleasepool_in_thread_pool;
}
set {
System.Threading._ThreadPoolWaitCallback.SetDispatcher (value ? new Func<Func<bool>, bool> (ThreadPoolDispatcher) : null);
has_autoreleasepool_in_thread_pool = value;
}
}
static bool ThreadPoolDispatcher (Func<bool> callback)
{
using (var pool = new NSAutoreleasePool ())
return callback ();
}
#endif
#if MONOMAC
public static event AssemblyRegistrationHandler AssemblyRegistration;
static bool OnAssemblyRegistration (AssemblyName assembly_name)
{
if (AssemblyRegistration != null) {
var args = new AssemblyRegistrationEventArgs
{
Register = true,
AssemblyName = assembly_name
};
AssemblyRegistration (null, args);
return args.Register;
}
return true;
}
#endif
static MarshalObjectiveCExceptionMode objc_exception_mode;
static MarshalManagedExceptionMode managed_exception_mode;
public static event MarshalObjectiveCExceptionHandler MarshalObjectiveCException;
public static event MarshalManagedExceptionHandler MarshalManagedException;
static MarshalObjectiveCExceptionMode OnMarshalObjectiveCException (IntPtr exception_handle, bool throwManagedAsDefault)
{
if (throwManagedAsDefault && MarshalObjectiveCException == null)
return MarshalObjectiveCExceptionMode.ThrowManagedException;
if (MarshalObjectiveCException != null) {
var exception = GetNSObject<NSException> (exception_handle);
var args = new MarshalObjectiveCExceptionEventArgs ()
{
Exception = exception,
ExceptionMode = throwManagedAsDefault ? MarshalObjectiveCExceptionMode.ThrowManagedException : objc_exception_mode,
};
MarshalObjectiveCException (null, args);
return args.ExceptionMode;
}
return objc_exception_mode;
}
static MarshalManagedExceptionMode OnMarshalManagedException (int exception_handle)
{
if (MarshalManagedException != null) {
var exception = GCHandle.FromIntPtr (new IntPtr (exception_handle)).Target as Exception;
var args = new MarshalManagedExceptionEventArgs ()
{
Exception = exception,
ExceptionMode = managed_exception_mode,
};
MarshalManagedException (null, args);
return args.ExceptionMode;
}
return managed_exception_mode;
}
static IntPtr GetFunctionPointer (Delegate d)
{
delegates.Add (d);
return Marshal.GetFunctionPointerForDelegate (d);
}
// value_handle: GCHandle to a (smart) enum value
// returns: a handle to a native NSString *
static IntPtr ConvertSmartEnumToNSString (IntPtr value_handle)
{
var value = GCHandle.FromIntPtr (value_handle).Target;
var smart_type = value.GetType ();
MethodBase getConstantMethod, getValueMethod;
if (!Registrar.IsSmartEnum (smart_type, out getConstantMethod, out getValueMethod))
throw ErrorHelper.CreateError (8024, $"Could not find a valid extension type for the smart enum '{smart_type.FullName}'. Please file a bug at https://github.com/xamarin/xamarin-macios/issues/new.");
var rv = (NSString) ((MethodInfo) getConstantMethod).Invoke (null, new object [] { value });
if (rv == null)
return IntPtr.Zero;
rv.DangerousRetain ().DangerousAutorelease ();
return rv.Handle;
}
// value: native NSString *
// returns: GCHandle to a (smart) enum value. Caller must free the GCHandle.
static IntPtr ConvertNSStringToSmartEnum (IntPtr value, IntPtr type)
{
var smart_type = (Type) ObjectWrapper.Convert (type);
var str = GetNSObject<NSString> (value);
MethodBase getConstantMethod, getValueMethod;
if (!Registrar.IsSmartEnum (smart_type, out getConstantMethod, out getValueMethod))
throw ErrorHelper.CreateError (8024, $"Could not find a valid extension type for the smart enum '{smart_type.FullName}'. Please file a bug at https://github.com/xamarin/xamarin-macios/issues/new.");
var rv = ((MethodInfo) getValueMethod).Invoke (null, new object [] { str });
return GCHandle.ToIntPtr (GCHandle.Alloc (rv));
}
#region Wrappers for delegate callbacks
static void RegisterNSObject (IntPtr managed_obj, IntPtr native_obj)
{
RegisterNSObject ((NSObject) ObjectWrapper.Convert (managed_obj), native_obj);
}
static void RegisterAssembly (IntPtr a)
{
RegisterAssembly ((Assembly) ObjectWrapper.Convert (a));
}
static void RegisterEntryAssembly (IntPtr a)
{
RegisterEntryAssembly ((Assembly) ObjectWrapper.Convert (a));
}
static void ThrowNSException (IntPtr ns_exception)
{
#if MONOMAC
throw new ObjCException (new NSException (ns_exception));
#else
throw new MonoTouchException (new NSException (ns_exception));
#endif
}
static void RethrowManagedException (uint exception_gchandle)
{
var e = (Exception) GCHandle.FromIntPtr ((IntPtr) exception_gchandle).Target;
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture (e).Throw ();
}
static int CreateNSException (IntPtr ns_exception)
{
Exception ex;
#if MONOMAC
ex = new ObjCException (Runtime.GetNSObject<NSException> (ns_exception));
#else
ex = new MonoTouchException (Runtime.GetNSObject<NSException> (ns_exception));
#endif
return GCHandle.ToIntPtr (GCHandle.Alloc (ex)).ToInt32 ();
}
static int CreateRuntimeException (int code, IntPtr message)
{
var ex = ErrorHelper.CreateError (code, Marshal.PtrToStringAuto (message));
return GCHandle.ToIntPtr (GCHandle.Alloc (ex)).ToInt32 ();
}
static IntPtr UnwrapNSException (uint exc_handle)
{
var obj = GCHandle.FromIntPtr (new IntPtr (exc_handle)).Target;
#if MONOMAC
var exc = obj as ObjCException;
#else
var exc = obj as MonoTouchException;
#endif
if (exc != null) {
return exc.NSException.DangerousRetain ().DangerousAutorelease ().Handle;
} else {
return IntPtr.Zero;
}
}
static IntPtr GetBlockWrapperCreator (IntPtr method, int parameter)
{
return ObjectWrapper.Convert (GetBlockWrapperCreator ((MethodInfo) ObjectWrapper.Convert (method), parameter));
}
static IntPtr CreateBlockProxy (IntPtr method, IntPtr block)
{
return ObjectWrapper.Convert (CreateBlockProxy ((MethodInfo) ObjectWrapper.Convert (method), block));
}
static IntPtr CreateDelegateProxy (IntPtr method, IntPtr @delegate, IntPtr signature, uint token_ref)
{
return BlockLiteral.GetBlockForDelegate ((MethodInfo) ObjectWrapper.Convert (method), ObjectWrapper.Convert (@delegate), token_ref, Marshal.PtrToStringAuto (signature));
}
static unsafe Assembly GetEntryAssembly ()
{
var asm = Assembly.GetEntryAssembly ();
#if MONOMAC
if (asm == null)
asm = Assembly.LoadFile (Marshal.PtrToStringAuto (options->EntryAssemblyPath));
#endif
return asm;
}
// This method will register all assemblies referenced by the entry assembly.
// For XM it will also register all assemblies loaded in the current appdomain.
internal static void RegisterAssemblies ()
{
#if PROFILE
var watch = new Stopwatch ();
#endif
RegisterEntryAssembly (GetEntryAssembly ());
#if PROFILE
Console.WriteLine ("RegisterAssemblies completed in {0} ms", watch.ElapsedMilliseconds);
#endif
}
// This method will register all assemblies referenced by the entry assembly.
// For XM it will also register all assemblies loaded in the current appdomain.
//
// NOTE: the (XI) linker remove this method for device builds (RemoveCode.cs) and as such cannot be renamed
// without updating mtouch
internal static void RegisterEntryAssembly (Assembly entry_assembly)
{
var assemblies = new List<Assembly> ();
assemblies.Add (NSObject.PlatformAssembly); // make sure our platform assembly comes first
// Recursively get all assemblies referenced by the entry assembly.
if (entry_assembly != null) {
var register_entry_assembly = true;
#if MONOMAC
register_entry_assembly = OnAssemblyRegistration (entry_assembly.GetName ());
#endif
if (register_entry_assembly)
CollectReferencedAssemblies (assemblies, entry_assembly);
} else {
Console.WriteLine ("Could not find the entry assembly.");
}
#if MONOMAC
// Add all assemblies already loaded
foreach (var a in AppDomain.CurrentDomain.GetAssemblies ()) {
if (!OnAssemblyRegistration (a.GetName ()))
continue;
if (!assemblies.Contains (a))
assemblies.Add (a);
}
#endif
foreach (var a in assemblies)
RegisterAssembly (a);
}
static void CollectReferencedAssemblies (List<Assembly> assemblies, Assembly assembly)
{
assemblies.Add (assembly);
foreach (var rf in assembly.GetReferencedAssemblies ()) {
#if MONOMAC
if (!OnAssemblyRegistration (rf))
continue;
#endif
try {
var a = Assembly.Load (rf);
if (!assemblies.Contains (a))
CollectReferencedAssemblies (assemblies, a);
}
catch (FileNotFoundException fefe) {
// that's more important for XI because device builds don't go thru this step
// and we can end up with simulator-only failures - bug #29211
NSLog ("Could not find `{0}` referenced by assembly `{1}`.", fefe.FileName, assembly.FullName);
#if MONOMAC
if (!NSApplication.IgnoreMissingAssembliesDuringRegistration)
throw;
#endif
}
}
}
internal static IEnumerable<Assembly> GetAssemblies ()
{
return Registrar.GetAssemblies ();
}
internal static string ComputeSignature (MethodInfo method, bool isBlockSignature)
{
return Registrar.ComputeSignature (method, isBlockSignature);
}
[BindingImpl (BindingImplOptions.Optimizable)]
public static void RegisterAssembly (Assembly a)
{
if (a == null)
throw new ArgumentNullException ("a");
if (!DynamicRegistrationSupported)
throw ErrorHelper.CreateError (8026, "Runtime.RegisterAssembly is not supported when the dynamic registrar has been linked away.");
#if MONOMAC
var attributes = a.GetCustomAttributes (typeof (RequiredFrameworkAttribute), false);
foreach (var attribute in attributes) {
var requiredFramework = (RequiredFrameworkAttribute)attribute;
string libPath;
string libName = requiredFramework.Name;
if (libName.Contains (".dylib")) {
libPath = ResourcesPath;
}
else {
libPath = FrameworksPath;
libPath = Path.Combine (libPath, libName);
libName = libName.Replace (".frameworks", "");
}
libPath = Path.Combine (libPath, libName);
if (Dlfcn.dlopen (libPath, 0) == IntPtr.Zero)
throw new Exception (string.Format ("Unable to load required framework: '{0}'", requiredFramework.Name),
new Exception (Dlfcn.dlerror()));
}
attributes = a.GetCustomAttributes (typeof (DelayedRegistrationAttribute), false);
foreach (var attribute in attributes) {
var delayedRegistration = (DelayedRegistrationAttribute) attribute;
if (delayedRegistration.Delay)
return;
}
#endif
if (assemblies == null) {
assemblies = new List <Assembly> ();
Class.Register (typeof (NSObject));
}
if (assemblies.Contains (a))
return;
assemblies.Add (a);
#if PROFILE
var watch = new Stopwatch ();
watch.Start ();
#endif
Registrar.RegisterAssembly (a);
#if PROFILE
watch.Stop ();
Console.WriteLine ("RegisterAssembly ({0}) completed in {1} ms", a.FullName, watch.ElapsedMilliseconds);
#endif
}
static IntPtr GetClass (IntPtr klass)
{
return ObjectWrapper.Convert (new Class (klass));
}
static IntPtr GetSelector (IntPtr sel)
{
return ObjectWrapper.Convert (new Selector (sel));
}
static void GetMethodForSelector (IntPtr cls, IntPtr sel, bool is_static, IntPtr desc)
{
// This is called by the old registrar code.
Registrar.GetMethodDescription (Class.Lookup (cls), sel, is_static, desc);
}
static IntPtr GetNSObjectWrapped (IntPtr ptr)
{
return ObjectWrapper.Convert (TryGetNSObject (ptr, true));
}
static bool HasNSObject (IntPtr ptr)
{
return TryGetNSObject (ptr) != null;
}
static IntPtr GetHandleForINativeObject (IntPtr ptr)
{
return ((INativeObject) ObjectWrapper.Convert (ptr)).Handle;
}
static void UnregisterNSObject (IntPtr native_obj, IntPtr managed_obj)
{
NativeObjectHasDied (native_obj, ObjectWrapper.Convert (managed_obj) as NSObject);
}
static unsafe IntPtr GetMethodFromToken (uint token_ref)
{
var method = Class.ResolveMethodTokenReference (token_ref);
if (method != null)
return ObjectWrapper.Convert (method);
return IntPtr.Zero;
}
static unsafe IntPtr GetGenericMethodFromToken (IntPtr obj, uint token_ref)
{
var method = Class.ResolveMethodTokenReference (token_ref);
if (method == null)
return IntPtr.Zero;
var nsobj = ObjectWrapper.Convert (obj) as NSObject;
if (nsobj == null)
throw ErrorHelper.CreateError (8023, $"An instance object is required to construct a closed generic method for the open generic method: {method.DeclaringType.FullName}.{method.Name} (token reference: 0x{token_ref:X}). Please file a bug report at https://github.com/xamarin/xamarin-macios/issues/new.");
return ObjectWrapper.Convert (FindClosedMethod (nsobj.GetType (), method));
}
static IntPtr TryGetOrConstructNSObjectWrapped (IntPtr ptr)
{
return ObjectWrapper.Convert (GetNSObject (ptr, MissingCtorResolution.Ignore, true));
}
static IntPtr GetINativeObject_Dynamic (IntPtr ptr, bool owns, IntPtr type_ptr)
{
/*
* This method is called from marshalling bridge (dynamic mode).
*/
// It doesn't work to use System.Type in the signature, we get garbage.
var type = (System.Type) ObjectWrapper.Convert (type_ptr);
return ObjectWrapper.Convert (GetINativeObject (ptr, owns, type));
}
static IntPtr GetINativeObject_Static (IntPtr ptr, bool owns, uint iface_token, uint implementation_token)
{
/*
* This method is called from generated code from the static registrar.
*/
var iface = Class.ResolveTypeTokenReference (iface_token);
var type = Class.ResolveTypeTokenReference (implementation_token);
return ObjectWrapper.Convert (GetINativeObject (ptr, owns, iface, type));
}
static IntPtr GetNSObjectWithType (IntPtr ptr, IntPtr type_ptr, out bool created)
{
// It doesn't work to use System.Type in the signature, we get garbage.
var type = (System.Type) ObjectWrapper.Convert (type_ptr);
return ObjectWrapper.Convert (GetNSObject (ptr, type, MissingCtorResolution.ThrowConstructor1NotFound, true, out created));
}
static void Dispose (IntPtr mobj)
{
((IDisposable) ObjectWrapper.Convert (mobj)).Dispose ();
}
static bool IsParameterTransient (IntPtr info, int parameter)
{
var minfo = ObjectWrapper.Convert (info) as MethodInfo;
if (minfo == null)
return false; // might be a ConstructorInfo (bug #15583), but we don't care about that (yet at least).
minfo = minfo.GetBaseDefinition ();
var parameters = minfo.GetParameters ();
if (parameters.Length <= parameter)
return false;
return parameters [parameter].IsDefined (typeof(TransientAttribute), false);
}
static bool IsParameterOut (IntPtr info, int parameter)
{
var minfo = ObjectWrapper.Convert (info) as MethodInfo;
if (minfo == null)
return false; // might be a ConstructorInfo (bug #15583), but we don't care about that (yet at least).
minfo = minfo.GetBaseDefinition ();
var parameters = minfo.GetParameters ();
if (parameters.Length <= parameter)
return false;
return parameters [parameter].IsOut;
}
static void GetMethodAndObjectForSelector (IntPtr klass, IntPtr sel, bool is_static, IntPtr obj, ref IntPtr mthis, IntPtr desc)
{
Registrar.GetMethodDescriptionAndObject (Class.Lookup (klass), sel, is_static, obj, ref mthis, desc);
}
// If inner_exception_gchandle is provided, it will be freed.
static int CreateProductException (int code, uint inner_exception_gchandle, string msg)
{
Exception inner_exception = null;
if (inner_exception_gchandle != 0) {
GCHandle gchandle = GCHandle.FromIntPtr (new IntPtr (inner_exception_gchandle));
inner_exception = (Exception) gchandle.Target;
gchandle.Free ();
}
Exception ex;
if (inner_exception != null) {
ex = ErrorHelper.CreateError (code, inner_exception, msg);
} else {
ex = ErrorHelper.CreateError (code, msg);
}
return GCHandle.ToIntPtr (GCHandle.Alloc (ex, GCHandleType.Normal)).ToInt32 ();
}
static IntPtr TypeGetFullName (IntPtr type)
{
return Marshal.StringToHGlobalAuto (((Type) ObjectWrapper.Convert (type)).FullName);
}
static IntPtr LookupManagedTypeName (IntPtr klass)
{
return Marshal.StringToHGlobalAuto (Class.LookupFullName (klass));
}
#endregion
static MethodInfo GetBlockProxyAttributeMethod (MethodInfo method, int parameter)
{
var attrs = method.GetParameters () [parameter].GetCustomAttributes (typeof (BlockProxyAttribute), true);
if (attrs.Length == 1) {
try {
var attr = attrs [0] as BlockProxyAttribute;
return attr.Type.GetMethod ("Create");
} catch {
return null;
}
}
return null;
}
internal static ProtocolMemberAttribute GetProtocolMemberAttribute (Type type, string selector, MethodInfo method)
{
var memberAttributes = type.GetCustomAttributes<ProtocolMemberAttribute> ();
if (memberAttributes == null)
return null;
foreach (var attrib in memberAttributes) {
if (attrib.IsStatic != method.IsStatic)
continue;
if (attrib.Selector != selector)
continue;
if (!attrib.IsProperty) {
var methodParameters = method.GetParameters ();
if ((attrib.ParameterType?.Length ?? 0) != methodParameters.Length)
continue;
var notApplicable = false;
for (int i = 0; i < methodParameters.Length; i++) {
var paramType = methodParameters [i].ParameterType;
var isByRef = paramType.IsByRef;
if (isByRef)
paramType = paramType.GetElementType ();
if (isByRef != attrib.ParameterByRef [i]) {
notApplicable = true;
break;
}
if (paramType != attrib.ParameterType [i]) {
notApplicable = true;
break;
}
}
if (notApplicable)
continue;
}
return attrib;
}
return null;
}
//
// Returns a MethodInfo that represents the method that can be used to turn
// a the block in the given method at the given parameter into a strongly typed
// delegate
//
[EditorBrowsable (EditorBrowsableState.Never)]
#if XAMCORE_2_0
internal
#else
public
#endif
static MethodInfo GetBlockWrapperCreator (MethodInfo method, int parameter)
{
// A mirror of this method is also implemented in StaticRegistrar:FindBlockProxyCreatorMethod
// If this method is changed, that method will probably have to be updated too (tests!!!)
MethodInfo first = method;
MethodInfo last = null;
Type[] extensionParameters = null;
while (method != last){
last = method;
var createMethod = GetBlockProxyAttributeMethod (method, parameter);
if (createMethod != null)
return createMethod;
method = method.GetBaseDefinition ();
}
string selector = null;
// Might be the implementation of an interface method, so find the corresponding
// MethodInfo for the interface, and check for BlockProxy attributes there as well.
foreach (var iface in method.DeclaringType.GetInterfaces ()) {
if (!iface.IsDefined (typeof (ProtocolAttribute), false))
continue;
var map = method.DeclaringType.GetInterfaceMap (iface);
for (int i = 0; i < map.TargetMethods.Length; i++) {
if (map.TargetMethods [i] == first) {
var createMethod = GetBlockProxyAttributeMethod (map.InterfaceMethods [i], parameter);
if (createMethod != null)
return createMethod;
}
}
// We store the BlockProxy type in the ProtocolMemberAttribute, so check those.
// We may run into binding assemblies built with earlier versions of the generator,
// which means we can't rely on finding the BlockProxy attribute in the ProtocolMemberAttribute.
if (selector == null)
selector = GetExportAttribute (method)?.Selector ?? string.Empty;
if (!string.IsNullOrEmpty (selector)) {
var attrib = GetProtocolMemberAttribute (iface, selector, method);
if (attrib != null && attrib.ParameterBlockProxy.Length > parameter && attrib.ParameterBlockProxy [parameter] != null)
return attrib.ParameterBlockProxy [parameter].GetMethod ("Create");
}
// Might be an implementation of an optional protocol member.
// We look that up on the corresponding extension method.
string extensionName = string.Empty;
if (!string.IsNullOrEmpty (iface.Namespace))
extensionName = iface.Namespace + ".";
extensionName +=iface.Name.Substring (1) + "_Extensions";
var extensionType = iface.Assembly.GetType (extensionName, false);
if (extensionType != null) {
if (extensionParameters == null) {
var methodParameters = method.GetParameters ();
extensionParameters = new Type [methodParameters.Length + 1];
for (int i = 0; i < methodParameters.Length; i++)
extensionParameters [i + 1] = methodParameters [i].ParameterType;
}
extensionParameters [0] = iface;
var extensionMethod = extensionType.GetMethod (method.Name, BindingFlags.Public | BindingFlags.Static, null, extensionParameters, null);
if (extensionMethod != null) {
var createMethod = GetBlockProxyAttributeMethod (extensionMethod, parameter + 1);
if (createMethod != null)
return createMethod;
}
}
}
throw new RuntimeException (8009, true, "Unable to locate the block to delegate conversion method for the method {0}.{1}'s parameter #{2}. Please file a bug at https://github.com/xamarin/xamarin-macios/issues/new.",
method.DeclaringType.FullName, method.Name, parameter + 1);
}
//
// Called from the runtime, since it is too hard to use the unmanaged API
// Given a MethodInfo, invoke it, passing the given block
//
// Used to call the Create(IntPtr) method on the proxy classes that turn
// objective c blocks into strongly typed delegates.
//
[EditorBrowsable (EditorBrowsableState.Never)]
#if XAMCORE_2_0
internal
#else
public
#endif
static Delegate CreateBlockProxy (MethodInfo method, IntPtr block)
{
return (Delegate) method.Invoke (null, new object [] { block } );
}
#if XAMCORE_2_0
internal
#else
public
#endif
static Delegate GetDelegateForBlock (IntPtr methodPtr, Type type)
{
if (block_to_delegate_cache == null)
block_to_delegate_cache = new Dictionary<IntPtrTypeValueTuple, Delegate> ();
// We do not care if there is a race condition and we initialize two caches
// since the worst that can happen is that we end up with an extra
// delegate->function pointer.
Delegate val;
var pair = new IntPtrTypeValueTuple (methodPtr, type);
lock (block_to_delegate_cache) {
if (block_to_delegate_cache.TryGetValue (pair, out val))
return val;
}
val = Marshal.GetDelegateForFunctionPointer (methodPtr, type);
lock (block_to_delegate_cache){
block_to_delegate_cache [pair] = val;
}
return val;
}
unsafe static MethodBase FindMethod (IntPtr typeptr, IntPtr methodptr, int paramCount, IntPtr* paramptr)
{
var type = Type.GetType (Marshal.PtrToStringAuto (typeptr));
var methodName = Marshal.PtrToStringAuto (methodptr);
var parameterTypes = new string [paramCount];
for (int i = 0; i < paramCount; i++)
parameterTypes [i] = Marshal.PtrToStringAuto (paramptr [i]);
MethodBase [] methods;
if (methodName == ".ctor") {
methods = type.GetConstructors (BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
} else {
methods = type.GetMethods (BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
}
foreach (var m in methods) {
if (m.Name != methodName)
continue;
var parameters = m.GetParameters ();
if (parameters.Length != paramCount)
continue;
bool found = true;
for (int i = 0; i < paramCount; i++) {
var paramType = parameters [i].ParameterType;
var ptaqn = paramType.AssemblyQualifiedName;
// the condensed string representation needs some fixup if there are generics used
if (paramType.IsGenericType) {
int s = 0;
while ((s = ptaqn.IndexOf (", Version=", s, StringComparison.OrdinalIgnoreCase)) != -1) {
var e = ptaqn.IndexOf (']', s);
ptaqn = (e == -1) ? ptaqn.Substring (0, s) : ptaqn.Remove (s, e - s);
}