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| /* | ||
| Copyright (C) 2002-2014 Jeroen Frijters | ||
| This software is provided 'as-is', without any express or implied | ||
| warranty. In no event will the authors be held liable for any damages | ||
| arising from the use of this software. | ||
| Permission is granted to anyone to use this software for any purpose, | ||
| including commercial applications, and to alter it and redistribute it | ||
| freely, subject to the following restrictions: | ||
| 1. The origin of this software must not be misrepresented; you must not | ||
| claim that you wrote the original software. If you use this software | ||
| in a product, an acknowledgment in the product documentation would be | ||
| appreciated but is not required. | ||
| 2. Altered source versions must be plainly marked as such, and must not be | ||
| misrepresented as being the original software. | ||
| 3. This notice may not be removed or altered from any source distribution. | ||
| Jeroen Frijters | ||
| jeroen@frijters.net | ||
| */ | ||
| using System; | ||
| using System.Runtime.CompilerServices; | ||
| using System.Collections.Concurrent; | ||
|
|
||
|
|
||
| #if IMPORTER | ||
| using IKVM.Reflection; | ||
| using IKVM.Reflection.Emit; | ||
| using IKVM.Tools.Importer; | ||
|
|
||
| using Type = IKVM.Reflection.Type; | ||
| using ProtectionDomain = System.Object; | ||
| #else | ||
| using System.Reflection; | ||
| #endif | ||
|
|
||
| namespace IKVM.Runtime | ||
| { | ||
| /// <summary> | ||
| /// Maintains instances of <see cref="DynamicClassLoader"/>. | ||
| /// </summary> | ||
| class DynamicClassLoaderFactory | ||
| { | ||
|
|
||
| readonly RuntimeContext context; | ||
| internal readonly ConcurrentDictionary<string, RuntimeJavaType> dynamicTypes = new(); | ||
| DynamicClassLoader instance; | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance. | ||
| /// </summary> | ||
| /// <param name="context"></param> | ||
| /// <exception cref="ArgumentNullException"></exception> | ||
| public DynamicClassLoaderFactory(RuntimeContext context) | ||
| { | ||
| this.context = context ?? throw new ArgumentNullException(nameof(context)); | ||
|
|
||
| #if IMPORTER == false | ||
| // we attach to the AppDomain.TypeResolve event to be notified when the CLR cannot find a type, and we must provide it | ||
| AppDomain.CurrentDomain.TypeResolve += new ResolveEventHandler(OnTypeResolve); | ||
|
|
||
| // exclude '<Module>' as a valid type name, as it overlaps with the pseudo-type for global fields and methods | ||
| dynamicTypes.TryAdd("<Module>", null); | ||
| #endif | ||
| } | ||
|
|
||
| #if IMPORTER == false | ||
|
|
||
| /// <summary> | ||
| /// Invoked when the runtime cannot load a type. | ||
| /// </summary> | ||
| /// <param name="sender"></param> | ||
| /// <param name="args"></param> | ||
| /// <returns></returns> | ||
| Assembly OnTypeResolve(object sender, ResolveEventArgs args) | ||
| { | ||
| return Resolve(dynamicTypes, args.Name); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Attempts to resolve the given type name from the specified dictionary. | ||
| /// </summary> | ||
| /// <param name="dict"></param> | ||
| /// <param name="name"></param> | ||
| /// <returns></returns> | ||
| Assembly Resolve(ConcurrentDictionary<string, RuntimeJavaType> dict, string name) | ||
| { | ||
| if (dict.TryGetValue(name, out var type)) | ||
| { | ||
| try | ||
| { | ||
| type.Finish(); | ||
| return type.TypeAsTBD.Assembly; | ||
| } | ||
| catch (RetargetableJavaException e) | ||
| { | ||
| throw e.ToJava(); | ||
| } | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
|
|
||
| #endif | ||
|
|
||
| /// <summary> | ||
| /// Gets the <see cref="DynamicClassLoader"/> instance which should be used for dynamic classes emitted by the given class loader. | ||
| /// </summary> | ||
| /// <param name="loader"></param> | ||
| /// <returns></returns> | ||
| [System.Security.SecuritySafeCritical] | ||
| public DynamicClassLoader GetOrCreate(RuntimeClassLoader loader) | ||
| { | ||
| #if IMPORTER | ||
| // importer uses only one class loader, and we can just return a single dynamic class loader | ||
| return new DynamicClassLoader(context, loader.Diagnostics, ((ImportClassLoader)loader).CreateModuleBuilder(), false); | ||
| #else | ||
| // each assembly class loader gets its own dynamic class loader | ||
| if (loader is RuntimeAssemblyClassLoader acl) | ||
| { | ||
| var name = acl.MainAssembly.GetName().Name + context.Options.DynamicAssemblySuffixAndPublicKey; | ||
| foreach (var attr in acl.MainAssembly.GetCustomAttributes<InternalsVisibleToAttribute>()) | ||
| { | ||
| if (attr.AssemblyName == name) | ||
| { | ||
| var n = new AssemblyName(name); | ||
| #if NETFRAMEWORK | ||
| n.KeyPair = DynamicClassLoader.ForgedKeyPair.Instance; | ||
| #endif | ||
| return new DynamicClassLoader(context, loader.Diagnostics, DynamicClassLoader.CreateModuleBuilder(context, n), true); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return instance ??= new DynamicClassLoader(context, loader.Diagnostics, DynamicClassLoader.CreateModuleBuilder(context), false); | ||
| #endif | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Reserves the given type name. | ||
| /// </summary> | ||
| /// <param name="name"></param> | ||
| /// <returns></returns> | ||
| public bool ReserveName(string name) | ||
| { | ||
| return dynamicTypes.TryAdd(name, null); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Associated the given Java type with the given type name, ensuring the actual stored name is unique. | ||
| /// </summary> | ||
| /// <param name="dict"></param> | ||
| /// <param name="name"></param> | ||
| /// <param name="javaType"></param> | ||
| /// <returns></returns> | ||
| public static string TypeNameMangleImpl(ConcurrentDictionary<string, RuntimeJavaType> dict, string name, RuntimeJavaType javaType) | ||
| { | ||
| // the CLR maximum type name length is 1023 characters, but we need to leave some room for the suffix that we may need to append to make the name unique | ||
| const int MaxLength = 1000; | ||
|
|
||
| if (name.Length > MaxLength) | ||
| name = name.Substring(0, MaxLength) + "/truncated"; | ||
|
|
||
| var mangledTypeName = TypeNameUtil.ReplaceIllegalCharacters(name); | ||
| var baseTypeName = mangledTypeName; | ||
| int instanceId = 0; | ||
|
|
||
| // advance through unique type names until we find a free one | ||
| while (dict.TryAdd(mangledTypeName, javaType) == false) | ||
| { | ||
| javaType.ClassLoader.Diagnostics.GenericCompilerWarning($"Class name clash: {mangledTypeName}"); | ||
| mangledTypeName = baseTypeName + "/" + (++instanceId); | ||
| } | ||
|
|
||
| return mangledTypeName; | ||
| } | ||
|
|
||
| } | ||
|
|
||
| } |
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