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Runtime.cs
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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.
#nullable enable
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 System.Text;
using CoreFoundation;
using Foundation;
using Registrar;
#if MONOMAC
using AppKit;
#endif
#if !NET
using NativeHandle = System.IntPtr;
#endif
namespace ObjCRuntime {
public partial class Runtime {
#if !COREBUILD
#pragma warning disable 8618 // "Non-nullable field '...' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.": we make sure through other means that these will never be null
static Dictionary<IntPtrTypeValueTuple, Delegate> block_to_delegate_cache;
static Dictionary<Type, ConstructorInfo> intptr_ctor_cache;
static Dictionary<Type, ConstructorInfo> intptr_bool_ctor_cache;
internal static Dictionary<IntPtr, Dictionary<IntPtr, bool>> protocol_cache;
static ConditionalWeakTable<Delegate, BlockCollector> block_lifetime_table;
static List<object> delegates;
static List<Assembly> assemblies;
static Dictionary<IntPtr, GCHandle> object_map;
static Dictionary<IntPtr, bool> usertype_cache;
static object lock_obj;
static IntPtr NSObjectClass;
static bool initialized;
internal static IntPtrEqualityComparer IntPtrEqualityComparer;
internal static TypeEqualityComparer TypeEqualityComparer;
internal static DynamicRegistrar Registrar;
#pragma warning restore 8618
internal const uint INVALID_TOKEN_REF = 0xFFFFFFFF;
#pragma warning disable 649 // Field 'X' is never assigned to, and will always have its default value
internal unsafe struct MTRegistrationMap {
public IntPtr product_hash;
public MTAssembly* assemblies;
public MTClassMap* map;
public MTFullTokenReference* full_token_references;
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;
}
#pragma warning restore 649
[Flags]
internal enum MTTypeFlags : uint {
None = 0,
CustomType = 1,
UserType = 2,
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal unsafe struct MTFullTokenReference {
public uint assembly_index;
public uint module_token;
public uint token;
}
[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;
}
[StructLayout (LayoutKind.Sequential, Pack = 1)]
internal unsafe struct MTAssembly {
public IntPtr name;
public IntPtr mvid;
}
/* Keep Delegates, Trampolines and InitializationOptions in sync with monotouch-glue.m */
#pragma warning disable 649 // Field 'X' is never assigned to, and will always have its default value
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;
public IntPtr get_flags_tramp;
public IntPtr set_flags_tramp;
}
#pragma warning restore 649
[Flags]
internal enum InitializationFlags : int {
IsPartialStaticRegistrar = 0x01,
IsManagedStaticRegistrar = 0x02,
/* unused = 0x04,*/
/* unused = 0x08,*/
IsSimulator = 0x10,
#if NET
IsCoreCLR = 0x20,
#endif
}
#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;
#if NET
public IntPtr xamarin_objc_msgsend;
public IntPtr xamarin_objc_msgsend_super;
public IntPtr xamarin_objc_msgsend_stret;
public IntPtr xamarin_objc_msgsend_super_stret;
public IntPtr unhandled_exception_handler;
public IntPtr reference_tracking_begin_end_callback;
public IntPtr reference_tracking_is_referenced_callback;
public IntPtr reference_tracking_tracked_object_entered_finalization;
#endif
public bool IsSimulator {
get {
return (Flags & InitializationFlags.IsSimulator) == InitializationFlags.IsSimulator;
}
}
}
internal static unsafe InitializationOptions* options;
#if NET
public static class ClassHandles
{
internal static unsafe void InitializeClassHandles (MTClassMap* map)
{
}
}
#endif
#if NET
[BindingImpl (BindingImplOptions.Optimizable)]
internal unsafe static bool IsCoreCLR {
get {
// The linker may turn calls to this property into a constant
return (options->Flags.HasFlag (InitializationFlags.IsCoreCLR));
}
}
#endif
[BindingImpl (BindingImplOptions.Optimizable)]
internal unsafe static bool IsManagedStaticRegistrar {
get {
// The linker may turn calls to this property into a constant
return (options->Flags.HasFlag (InitializationFlags.IsManagedStaticRegistrar));
}
}
[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))) {
var msg = $"Version mismatch between the native {ProductName} runtime and {AssemblyName}. Please reinstall {ProductName}.";
NSLog (msg);
#if MONOMAC
try {
// Print out where Xamarin.Mac.dll and the native runtime was loaded from.
NSLog ($"{AssemblyName} was loaded from {typeof (NSObject).Assembly.Location}");
var sym2 = Dlfcn.dlsym (Dlfcn.RTLD.Default, "xamarin_initialize");
Dlfcn.Dl_info info2;
if (Dlfcn.dladdr (sym2, out info2) == 0) {
NSLog ($"The native runtime was loaded from {Marshal.PtrToStringAuto (info2.dli_fname)}");
} else if (Dlfcn.dlsym (Dlfcn.RTLD.MainOnly, "xamarin_initialize") != IntPtr.Zero) {
var buf = new byte [128];
int length = buf.Length;
if (_NSGetExecutablePath (buf, ref length) == -1) {
Array.Resize (ref buf, length);
length = buf.Length;
if (_NSGetExecutablePath (buf, ref length) != 0) {
NSLog ("Could not find out where the native runtime was loaded from.");
buf = null;
}
}
if (buf is not null) {
var str_length = 0;
for (int i = 0; i < buf.Length && buf [i] != 0; i++)
str_length++;
NSLog ($"The native runtime was loaded from {Encoding.UTF8.GetString (buf, 0, str_length)}");
}
} else {
NSLog ("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 = $"Native type size mismatch between {AssemblyName} and the executing architecture. {AssemblyName} was built for {(IntPtr.Size == 4 ? 64 : 32)}-bit, while the current process is {(IntPtr.Size == 4 ? 32 : 64)}-bit.";
NSLog (msg);
throw ErrorHelper.CreateError (8010, msg);
}
IntPtrEqualityComparer = new IntPtrEqualityComparer ();
TypeEqualityComparer = new TypeEqualityComparer ();
Runtime.options = options;
delegates = new List<object> ();
object_map = new Dictionary<IntPtr, GCHandle> (IntPtrEqualityComparer);
usertype_cache = new Dictionary<IntPtr, bool> (IntPtrEqualityComparer);
intptr_ctor_cache = new Dictionary<Type, ConstructorInfo> (TypeEqualityComparer);
intptr_bool_ctor_cache = new Dictionary<Type, ConstructorInfo> (TypeEqualityComparer);
block_lifetime_table = new ConditionalWeakTable<Delegate, BlockCollector> ();
lock_obj = new object ();
NSObjectClass = NSObject.Initialize ();
if (DynamicRegistrationSupported) {
Registrar = new DynamicRegistrar ();
protocol_cache = new Dictionary<IntPtr, Dictionary<IntPtr, bool>> (IntPtrEqualityComparer);
}
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
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;
#if NET
if (IsCoreCLR)
InitializeCoreCLRBridge (options);
#endif
initialized = true;
#if PROFILE
Console.WriteLine ("Runtime.Initialize completed in {0} ms", watch.ElapsedMilliseconds);
#endif
}
#if !XAMMAC_SYSTEM_MONO
#if !NET
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 // !NET
#endif
#if MONOMAC
public static event AssemblyRegistrationHandler? AssemblyRegistration;
static bool OnAssemblyRegistration (AssemblyName assembly_name)
{
if (AssemblyRegistration is not 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, sbyte throwManagedAsDefault)
{
if (throwManagedAsDefault != 0 && MarshalObjectiveCException is null)
return MarshalObjectiveCExceptionMode.ThrowManagedException;
if (MarshalObjectiveCException is not null) {
var exception = GetNSObject<NSException> (exception_handle);
var args = new MarshalObjectiveCExceptionEventArgs () {
Exception = exception,
ExceptionMode = (throwManagedAsDefault != 0) ? MarshalObjectiveCExceptionMode.ThrowManagedException : objc_exception_mode,
};
MarshalObjectiveCException (null, args);
return args.ExceptionMode;
}
return objc_exception_mode;
}
static MarshalManagedExceptionMode OnMarshalManagedException (IntPtr exception_handle)
{
if (MarshalManagedException is not null) {
var exception = GCHandle.FromIntPtr (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 = GetGCHandleTarget (value_handle)!;
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 is 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) GetGCHandleTarget (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 AllocGCHandle (rv);
}
#region Wrappers for delegate callbacks
static void RegisterAssembly (IntPtr a)
{
RegisterAssembly ((Assembly) GetGCHandleTarget (a)!);
}
static void RegisterEntryAssembly (IntPtr a)
{
RegisterEntryAssembly ((Assembly) GetGCHandleTarget (a)!);
}
static void ThrowNSException (IntPtr ns_exception)
{
#if MONOMAC || NET
throw new ObjCException (new NSException (ns_exception));
#else
throw new MonoTouchException (new NSException (ns_exception));
#endif
}
static void RethrowManagedException (IntPtr exception_gchandle)
{
var e = (Exception) GCHandle.FromIntPtr ((IntPtr) exception_gchandle).Target!;
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture (e).Throw ();
}
static IntPtr CreateNSException (IntPtr ns_exception)
{
Exception ex;
#if MONOMAC || NET
ex = new ObjCException (Runtime.GetNSObject<NSException> (ns_exception)!);
#else
ex = new MonoTouchException (Runtime.GetNSObject<NSException> (ns_exception)!);
#endif
return AllocGCHandle (ex);
}
static Exception CreateRuntimeException (int code, string message)
{
return ErrorHelper.CreateError (code, message);
}
static IntPtr CreateRuntimeException (int code, IntPtr message)
{
var ex = ErrorHelper.CreateError (code, Marshal.PtrToStringAuto (message)!);
return AllocGCHandle (ex);
}
static IntPtr UnwrapNSException (IntPtr exc_handle)
{
var obj = GCHandle.FromIntPtr (exc_handle).Target;
#if MONOMAC || NET
var exc = obj as ObjCException;
#else
var exc = obj as MonoTouchException;
#endif
var nsexc = exc?.NSException;
if (nsexc is not null) {
return nsexc.DangerousRetain ().DangerousAutorelease ().Handle;
} else {
return IntPtr.Zero;
}
}
static IntPtr GetBlockWrapperCreator (IntPtr method, int parameter)
{
return AllocGCHandle (GetBlockWrapperCreator ((MethodInfo) GetGCHandleTarget (method)!, parameter));
}
static IntPtr CreateBlockProxy (IntPtr method, IntPtr block)
{
return AllocGCHandle (CreateBlockProxy ((MethodInfo) GetGCHandleTarget (method)!, block));
}
static IntPtr CreateDelegateProxy (IntPtr method, IntPtr @delegate, IntPtr signature, uint token_ref)
{
return BlockLiteral.GetBlockForDelegate ((MethodInfo) GetGCHandleTarget (method)!, GetGCHandleTarget (@delegate), token_ref, Marshal.PtrToStringAuto (signature));
}
static IntPtr GetExceptionMessage (IntPtr exception_gchandle)
{
var exc = (Exception) GetGCHandleTarget (exception_gchandle)!;
return Marshal.StringToHGlobalAuto (exc.Message);
}
static void PrintException (Exception exc, bool isInnerException, StringBuilder sb)
{
if (isInnerException)
sb.AppendLine (" --- inner exception ---");
sb.Append (exc.Message).Append (" (").Append (exc.GetType ().FullName).AppendLine (")");
var trace = exc.StackTrace;
if (!string.IsNullOrEmpty (trace))
sb.AppendLine (trace);
}
static IntPtr PrintAllExceptions (IntPtr exception_gchandle)
{
var str = new StringBuilder ();
try {
var exc = (Exception?) GetGCHandleTarget (exception_gchandle);
if (exc is null) {
str.Append ($"Unable to print exception handle 0x{exception_gchandle.ToString ("x")}: null exception");
} else {
int counter = 0;
do {
PrintException (exc, counter > 0, str);
exc = exc.InnerException;
} while (counter < 10 && exc is not null);
}
} catch (Exception exception) {
str.Append ("Failed to print exception: ").Append (exception);
}
return Marshal.StringToHGlobalAuto (str.ToString ());
}
static unsafe Assembly? GetEntryAssembly ()
{
var asm = Assembly.GetEntryAssembly ();
#if MONOMAC
if (asm is 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 linker will remove this method when the dynamic registrar has been optimized away (RemoveCode.cs)
// and as such cannot be renamed without updating the linker
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 is not 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 {
NSLog ("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 ($"Could not find `{fefe.FileName}` referenced by assembly `{assembly.FullName}`.");
#if MONOMAC && !NET
if (!NSApplication.IgnoreMissingAssembliesDuringRegistration)
throw;
#endif
}
}
}
internal static IEnumerable<Assembly> GetAssemblies ()
{
return Registrar.GetAssemblies ();
}
internal static string ComputeSignature (MethodInfo method, bool isBlockSignature)
{
return Registrar.ComputeSignature (method, isBlockSignature);
}
[BindingImpl (BindingImplOptions.Optimizable)]
public static void RegisterAssembly (Assembly a)
{
if (a is null)
throw new ArgumentNullException (nameof (a));
if (!DynamicRegistrationSupported)
throw ErrorHelper.CreateError (8026, "Runtime.RegisterAssembly is not supported when the dynamic registrar has been linked away.");
#if MONOMAC
var attributes = a.GetCustomAttributes (typeof (RequiredFrameworkAttribute), false);
foreach (var attribute in attributes) {
var requiredFramework = (RequiredFrameworkAttribute)attribute;
string libPath;
string libName = requiredFramework.Name;
if (libName.Contains (".dylib")) {
libPath = ResourcesPath!;
}
else {
libPath = FrameworksPath!;
libPath = Path.Combine (libPath, libName);
libName = libName.Replace (".frameworks", "");
}
libPath = Path.Combine (libPath, libName);
if (Dlfcn.dlopen (libPath, 0) == IntPtr.Zero)
throw new Exception ($"Unable to load required framework: '{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 is 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 AllocGCHandle (new Class (klass));
}
static IntPtr GetSelector (IntPtr sel)
{
return AllocGCHandle (new Selector (sel));
}
static void GetMethodForSelector (IntPtr cls, IntPtr sel, sbyte is_static, IntPtr desc)
{
// This is called by the old registrar code.
Registrar.GetMethodDescription (Class.Lookup (cls), sel, is_static != 0, desc);
}
#if NET
internal static bool HasNSObject (NativeHandle ptr)
{
return TryGetNSObject (ptr, evenInFinalizerQueue: false) is not null;
}
#endif
internal static sbyte HasNSObject (IntPtr ptr)
{
var rv = TryGetNSObject (ptr, evenInFinalizerQueue: false) is not null;
return (sbyte) (rv ? 1 : 0);
}
static IntPtr GetHandleForINativeObject (IntPtr ptr)
{
return ((INativeObject) GetGCHandleTarget (ptr)!).Handle;
}
static void UnregisterNSObject (IntPtr native_obj, IntPtr managed_obj)
{
NativeObjectHasDied (native_obj, GetGCHandleTarget (managed_obj) as NSObject);
}
static unsafe IntPtr GetMethodFromToken (uint token_ref)
{
var method = Class.ResolveMethodTokenReference (token_ref);
if (method is not null)
return AllocGCHandle (method);
return IntPtr.Zero;
}
static unsafe IntPtr GetGenericMethodFromToken (IntPtr obj, uint token_ref)
{
var method = Class.ResolveMethodTokenReference (token_ref);
if (method is null)
return IntPtr.Zero;
var nsobj = GetGCHandleTarget (obj) as NSObject;
return AllocGCHandle (FindClosedMethodForObject (nsobj, method));
}
static MethodInfo FindClosedMethodForObject (NSObject? nsobj, MethodBase method)
{
if (nsobj is 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}. {Constants.PleaseFileBugReport}");
return FindClosedMethod (nsobj.GetType (), method);
}
static IntPtr TryGetOrConstructNSObjectWrapped (IntPtr ptr)
{
return AllocGCHandle (GetNSObject (ptr, MissingCtorResolution.Ignore, true));
}
static IntPtr GetINativeObject_Dynamic (IntPtr ptr, sbyte owns, IntPtr type_ptr)
{
/*
* This method is called from marshalling bridge (dynamic mode).
*/
var type = (System.Type) GetGCHandleTarget (type_ptr)!;
return AllocGCHandle (GetINativeObject (ptr, owns != 0, type, null));
}
static IntPtr GetINativeObject_Static (IntPtr ptr, sbyte 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 AllocGCHandle (GetINativeObject (ptr, owns != 0, iface, type));
}
unsafe static IntPtr GetNSObjectWithType (IntPtr ptr, IntPtr type_ptr, int* createdPtr)
{
var type = (System.Type) GetGCHandleTarget (type_ptr)!;
var rv = AllocGCHandle (GetNSObject (ptr, type, MissingCtorResolution.ThrowConstructor1NotFound, true, true, out var created));
*createdPtr = created ? 1 : 0;
return rv;
}
static void Dispose (IntPtr gchandle)
{
((IDisposable?) GetGCHandleTarget (gchandle))?.Dispose ();
}
static sbyte IsParameterTransient (IntPtr info, int parameter)
{
var minfo = GetGCHandleTarget (info) as MethodInfo;
if (minfo is null)
return 0; // 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 0;
var rv = parameters [parameter].IsDefined (typeof (TransientAttribute), false);
return (sbyte) (rv ? 1 : 0);
}
static sbyte IsParameterOut (IntPtr info, int parameter)
{
var minfo = GetGCHandleTarget (info) as MethodInfo;
if (minfo is null)
return 0; // 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 0;
var rv = parameters [parameter].IsOut;
return (sbyte) (rv ? 1 : 0);
}
unsafe static void GetMethodAndObjectForSelector (IntPtr klass, IntPtr sel, sbyte is_static, IntPtr obj, IntPtr* mthisPtr, IntPtr desc)
{
IntPtr mthis = *mthisPtr;
Registrar.GetMethodDescriptionAndObject (Class.Lookup (klass), sel, is_static != 0, obj, ref mthis, desc);
*mthisPtr = mthis;
}
// If inner_exception_gchandle is provided, it will be freed.
static IntPtr CreateProductException (int code, IntPtr inner_exception_gchandle, IntPtr utf8Message)
{
Exception? inner_exception = null;
if (inner_exception_gchandle != IntPtr.Zero) {
GCHandle gchandle = GCHandle.FromIntPtr (inner_exception_gchandle);
inner_exception = (Exception?) gchandle.Target;
gchandle.Free ();
}
var msg = Marshal.PtrToStringAuto (utf8Message)!;
Exception ex = ErrorHelper.CreateError (code, inner_exception, msg);
return AllocGCHandle (ex);
}
static IntPtr TypeGetFullName (IntPtr type)
{
return Marshal.StringToHGlobalAuto (((Type) GetGCHandleTarget (type)!).FullName);
}
static IntPtr GetObjectTypeFullName (IntPtr gchandle)
{
var obj = GetGCHandleTarget (gchandle);
if (obj is null)
return IntPtr.Zero;
return Marshal.StringToHGlobalAuto (obj.GetType ().FullName);
}
static IntPtr LookupManagedTypeName (IntPtr klass)
{
return Marshal.StringToHGlobalAuto (Class.Lookup (klass)?.FullName);
}
#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 is 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)]
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 is not 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 is not null)
return createMethod;