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519 lines
23 KiB
519 lines
23 KiB
4 years ago
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using System;
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using System.Linq;
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using MessagePack.Formatters;
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using MessagePack.Internal;
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using System.Reflection;
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using System.Reflection.Emit;
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using System.Collections.Generic;
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using System.Text.RegularExpressions;
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using System.Threading;
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namespace MessagePack.Resolvers
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{
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#if !UNITY_WSA
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#if !NET_STANDARD_2_0
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/// <summary>
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/// UnionResolver by dynamic code generation.
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/// </summary>
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public sealed class DynamicUnionResolver : IFormatterResolver
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{
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public static readonly DynamicUnionResolver Instance = new DynamicUnionResolver();
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const string ModuleName = "MessagePack.Resolvers.DynamicUnionResolver";
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static readonly DynamicAssembly assembly;
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#if NETSTANDARD
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static readonly Regex SubtractFullNameRegex = new Regex(@", Version=\d+.\d+.\d+.\d+, Culture=\w+, PublicKeyToken=\w+", RegexOptions.Compiled);
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#else
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static readonly Regex SubtractFullNameRegex = new Regex(@", Version=\d+.\d+.\d+.\d+, Culture=\w+, PublicKeyToken=\w+");
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#endif
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static int nameSequence = 0;
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DynamicUnionResolver()
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{
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}
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static DynamicUnionResolver()
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{
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assembly = new DynamicAssembly(ModuleName);
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}
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#if NET_35
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public AssemblyBuilder Save()
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{
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return assembly.Save();
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}
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#endif
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public IMessagePackFormatter<T> GetFormatter<T>()
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{
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return FormatterCache<T>.formatter;
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}
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static class FormatterCache<T>
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{
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public static readonly IMessagePackFormatter<T> formatter;
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static FormatterCache()
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{
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var ti = typeof(T).GetTypeInfo();
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if (ti.IsNullable())
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{
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ti = ti.GenericTypeArguments[0].GetTypeInfo();
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var innerFormatter = DynamicUnionResolver.Instance.GetFormatterDynamic(ti.AsType());
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if (innerFormatter == null)
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{
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return;
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}
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formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(typeof(StaticNullableFormatter<>).MakeGenericType(ti.AsType()), new object[] { innerFormatter });
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return;
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}
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var formatterTypeInfo = BuildType(typeof(T));
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if (formatterTypeInfo == null) return;
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formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(formatterTypeInfo.AsType());
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}
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}
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static TypeInfo BuildType(Type type)
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{
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var ti = type.GetTypeInfo();
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// order by key(important for use jump-table of switch)
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var unionAttrs = ti.GetCustomAttributes<UnionAttribute>().OrderBy(x => x.Key).ToArray();
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if (unionAttrs.Length == 0) return null;
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if (!ti.IsInterface && !ti.IsAbstract)
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{
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throw new MessagePackDynamicUnionResolverException("Union can only be interface or abstract class. Type:" + type.Name);
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}
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var checker1 = new HashSet<int>();
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var checker2 = new HashSet<Type>();
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foreach (var item in unionAttrs)
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{
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if (!checker1.Add(item.Key)) throw new MessagePackDynamicUnionResolverException("Same union key has found. Type:" + type.Name + " Key:" + item.Key);
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if (!checker2.Add(item.SubType)) throw new MessagePackDynamicUnionResolverException("Same union subType has found. Type:" + type.Name + " SubType: " + item.SubType);
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}
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var formatterType = typeof(IMessagePackFormatter<>).MakeGenericType(type);
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var typeBuilder = assembly.DefineType("MessagePack.Formatters." + SubtractFullNameRegex.Replace(type.FullName, "").Replace(".", "_") + "Formatter" + +Interlocked.Increment(ref nameSequence), TypeAttributes.Public | TypeAttributes.Sealed, null, new[] { formatterType });
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FieldBuilder typeToKeyAndJumpMap = null; // Dictionary<RuntimeTypeHandle, KeyValuePair<int, int>>
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FieldBuilder keyToJumpMap = null; // Dictionary<int, int>
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// create map dictionary
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{
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var method = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, Type.EmptyTypes);
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typeToKeyAndJumpMap = typeBuilder.DefineField("typeToKeyAndJumpMap", typeof(Dictionary<RuntimeTypeHandle, KeyValuePair<int, int>>), FieldAttributes.Private | FieldAttributes.InitOnly);
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keyToJumpMap = typeBuilder.DefineField("keyToJumpMap", typeof(Dictionary<int, int>), FieldAttributes.Private | FieldAttributes.InitOnly);
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var il = method.GetILGenerator();
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BuildConstructor(type, unionAttrs, method, typeToKeyAndJumpMap, keyToJumpMap, il);
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}
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{
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var method = typeBuilder.DefineMethod("Serialize", MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual,
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typeof(int),
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new Type[] { typeof(byte[]).MakeByRefType(), typeof(int), type, typeof(IFormatterResolver) });
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var il = method.GetILGenerator();
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BuildSerialize(type, unionAttrs, method, typeToKeyAndJumpMap, il);
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}
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{
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var method = typeBuilder.DefineMethod("Deserialize", MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual,
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type,
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new Type[] { typeof(byte[]), typeof(int), typeof(IFormatterResolver), typeof(int).MakeByRefType() });
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var il = method.GetILGenerator();
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BuildDeserialize(type, unionAttrs, method, keyToJumpMap, il);
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}
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return typeBuilder.CreateTypeInfo();
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}
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static void BuildConstructor(Type type, UnionAttribute[] infos, ConstructorInfo method, FieldBuilder typeToKeyAndJumpMap, FieldBuilder keyToJumpMap, ILGenerator il)
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{
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il.EmitLdarg(0);
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il.Emit(OpCodes.Call, objectCtor);
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{
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il.EmitLdarg(0);
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il.EmitLdc_I4(infos.Length);
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il.Emit(OpCodes.Ldsfld, runtimeTypeHandleEqualityComparer);
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il.Emit(OpCodes.Newobj, typeMapDictionaryConstructor);
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var index = 0;
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foreach (var item in infos)
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{
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Ldtoken, item.SubType);
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il.EmitLdc_I4(item.Key);
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il.EmitLdc_I4(index);
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il.Emit(OpCodes.Newobj, intIntKeyValuePairConstructor);
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il.EmitCall(typeMapDictionaryAdd);
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index++;
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}
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il.Emit(OpCodes.Stfld, typeToKeyAndJumpMap);
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}
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{
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il.EmitLdarg(0);
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il.EmitLdc_I4(infos.Length);
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il.Emit(OpCodes.Newobj, keyMapDictionaryConstructor);
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var index = 0;
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foreach (var item in infos)
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{
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il.Emit(OpCodes.Dup);
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il.EmitLdc_I4(item.Key);
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il.EmitLdc_I4(index);
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il.EmitCall(keyMapDictionaryAdd);
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index++;
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}
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il.Emit(OpCodes.Stfld, keyToJumpMap);
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}
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il.Emit(OpCodes.Ret);
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}
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// int Serialize([arg:1]ref byte[] bytes, [arg:2]int offset, [arg:3]T value, [arg:4]IFormatterResolver formatterResolver);
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static void BuildSerialize(Type type, UnionAttribute[] infos, MethodBuilder method, FieldBuilder typeToKeyAndJumpMap, ILGenerator il)
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{
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// if(value == null) return WriteNil
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var elseBody = il.DefineLabel();
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var notFoundType = il.DefineLabel();
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il.EmitLdarg(3);
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il.Emit(OpCodes.Brtrue_S, elseBody);
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il.Emit(OpCodes.Br, notFoundType);
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il.MarkLabel(elseBody);
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var keyPair = il.DeclareLocal(typeof(KeyValuePair<int, int>));
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il.EmitLoadThis();
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il.EmitLdfld(typeToKeyAndJumpMap);
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il.EmitLdarg(3);
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il.EmitCall(objectGetType);
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il.EmitCall(getTypeHandle);
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il.EmitLdloca(keyPair);
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il.EmitCall(typeMapDictionaryTryGetValue);
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il.Emit(OpCodes.Brfalse, notFoundType);
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// var startOffset = offset;
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var startOffsetLocal = il.DeclareLocal(typeof(int));
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il.EmitLdarg(2);
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il.EmitStloc(startOffsetLocal);
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// offset += WriteFixedArrayHeaderUnsafe(,,2);
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EmitOffsetPlusEqual(il, null, () =>
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{
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il.EmitLdc_I4(2);
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il.EmitCall(MessagePackBinaryTypeInfo.WriteFixedArrayHeaderUnsafe);
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});
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// offset += WriteInt32(,,keyPair.Key)
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EmitOffsetPlusEqual(il, null, () =>
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{
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il.EmitLdloca(keyPair);
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il.EmitCall(intIntKeyValuePairGetKey);
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il.EmitCall(MessagePackBinaryTypeInfo.WriteInt32);
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});
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var loopEnd = il.DefineLabel();
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// switch-case (offset += resolver.GetFormatter.Serialize(with cast)
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var switchLabels = infos.Select(x => new { Label = il.DefineLabel(), Attr = x }).ToArray();
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il.EmitLdloca(keyPair);
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il.EmitCall(intIntKeyValuePairGetValue);
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il.Emit(OpCodes.Switch, switchLabels.Select(x => x.Label).ToArray());
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il.Emit(OpCodes.Br, loopEnd); // default
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foreach (var item in switchLabels)
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{
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il.MarkLabel(item.Label);
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EmitOffsetPlusEqual(il, () =>
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{
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il.EmitLdarg(4);
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il.Emit(OpCodes.Call, getFormatterWithVerify.MakeGenericMethod(item.Attr.SubType));
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}, () =>
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{
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il.EmitLdarg(3);
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if (item.Attr.SubType.GetTypeInfo().IsValueType)
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{
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il.Emit(OpCodes.Unbox_Any, item.Attr.SubType);
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}
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else
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{
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il.Emit(OpCodes.Castclass, item.Attr.SubType);
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}
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il.EmitLdarg(4);
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il.Emit(OpCodes.Callvirt, getSerialize(item.Attr.SubType));
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});
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il.Emit(OpCodes.Br, loopEnd);
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}
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// return startOffset- offset;
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il.MarkLabel(loopEnd);
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il.EmitLdarg(2);
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il.EmitLdloc(startOffsetLocal);
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il.Emit(OpCodes.Sub);
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il.Emit(OpCodes.Ret);
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// else, return WriteNil
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il.MarkLabel(notFoundType);
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitCall(MessagePackBinaryTypeInfo.WriteNil);
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il.Emit(OpCodes.Ret);
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}
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// offset += ***(ref bytes, offset....
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static void EmitOffsetPlusEqual(ILGenerator il, Action loadEmit, Action emit)
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{
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il.EmitLdarg(2);
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if (loadEmit != null) loadEmit();
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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emit();
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il.Emit(OpCodes.Add);
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il.EmitStarg(2);
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}
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// T Deserialize([arg:1]byte[] bytes, [arg:2]int offset, [arg:3]IFormatterResolver formatterResolver, [arg:4]out int readSize);
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static void BuildDeserialize(Type type, UnionAttribute[] infos, MethodBuilder method, FieldBuilder keyToJumpMap, ILGenerator il)
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{
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// if(MessagePackBinary.IsNil) readSize = 1, return null;
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var falseLabel = il.DefineLabel();
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitCall(MessagePackBinaryTypeInfo.IsNil);
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il.Emit(OpCodes.Brfalse_S, falseLabel);
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il.EmitLdarg(4);
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il.EmitLdc_I4(1);
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il.Emit(OpCodes.Stind_I4);
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il.Emit(OpCodes.Ldnull);
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il.Emit(OpCodes.Ret);
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// read-array header and validate, ReadArrayHeader(bytes, offset, out readSize) != 2) throw;
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il.MarkLabel(falseLabel);
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var startOffset = il.DeclareLocal(typeof(int));
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il.EmitLdarg(2);
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il.EmitStloc(startOffset);
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var rightLabel = il.DefineLabel();
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitLdarg(4);
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il.EmitCall(MessagePackBinaryTypeInfo.ReadArrayHeader);
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il.EmitLdc_I4(2);
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il.Emit(OpCodes.Beq_S, rightLabel);
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il.Emit(OpCodes.Ldstr, "Invalid Union data was detected. Type:" + type.FullName);
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il.Emit(OpCodes.Newobj, invalidOperationExceptionConstructor);
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il.Emit(OpCodes.Throw);
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il.MarkLabel(rightLabel);
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EmitOffsetPlusReadSize(il);
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// read key
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var key = il.DeclareLocal(typeof(int));
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitLdarg(4);
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il.EmitCall(MessagePackBinaryTypeInfo.ReadInt32);
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il.EmitStloc(key);
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EmitOffsetPlusReadSize(il);
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// is-sequential don't need else convert key to jump-table value
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if (!IsZeroStartSequential(infos))
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{
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var endKeyMapGet = il.DefineLabel();
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il.EmitLdarg(0);
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il.EmitLdfld(keyToJumpMap);
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il.EmitLdloc(key);
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il.EmitLdloca(key);
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il.EmitCall(keyMapDictionaryTryGetValue);
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il.Emit(OpCodes.Brtrue_S, endKeyMapGet);
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il.EmitLdc_I4(-1);
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il.EmitStloc(key);
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il.MarkLabel(endKeyMapGet);
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}
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// switch->read
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var result = il.DeclareLocal(type);
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var loopEnd = il.DefineLabel();
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il.Emit(OpCodes.Ldnull);
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il.EmitStloc(result);
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il.Emit(OpCodes.Ldloc, key);
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var switchLabels = infos.Select(x => new { Label = il.DefineLabel(), Attr = x }).ToArray();
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il.Emit(OpCodes.Switch, switchLabels.Select(x => x.Label).ToArray());
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// default
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il.EmitLdarg(2);
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitCall(MessagePackBinaryTypeInfo.ReadNextBlock);
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il.Emit(OpCodes.Add);
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il.EmitStarg(2);
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il.Emit(OpCodes.Br, loopEnd);
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foreach (var item in switchLabels)
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{
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il.MarkLabel(item.Label);
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il.EmitLdarg(3);
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il.EmitCall(getFormatterWithVerify.MakeGenericMethod(item.Attr.SubType));
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il.EmitLdarg(1);
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il.EmitLdarg(2);
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il.EmitLdarg(3);
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il.EmitLdarg(4);
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il.EmitCall(getDeserialize(item.Attr.SubType));
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if (item.Attr.SubType.GetTypeInfo().IsValueType)
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{
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il.Emit(OpCodes.Box, item.Attr.SubType);
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}
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il.Emit(OpCodes.Stloc, result);
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EmitOffsetPlusReadSize(il);
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il.Emit(OpCodes.Br, loopEnd);
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}
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il.MarkLabel(loopEnd);
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//// finish readSize = offset - startOffset;
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il.EmitLdarg(4);
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il.EmitLdarg(2);
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il.EmitLdloc(startOffset);
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il.Emit(OpCodes.Sub);
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il.Emit(OpCodes.Stind_I4);
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il.Emit(OpCodes.Ldloc, result);
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il.Emit(OpCodes.Ret);
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}
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static bool IsZeroStartSequential(UnionAttribute[] infos)
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{
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for (int i = 0; i < infos.Length; i++)
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{
|
||
|
if (infos[i].Key != i) return false;
|
||
|
}
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static void EmitOffsetPlusReadSize(ILGenerator il)
|
||
|
{
|
||
|
il.EmitLdarg(2);
|
||
|
il.EmitLdarg(4);
|
||
|
il.Emit(OpCodes.Ldind_I4);
|
||
|
il.Emit(OpCodes.Add);
|
||
|
il.EmitStarg(2);
|
||
|
}
|
||
|
|
||
|
// EmitInfos...
|
||
|
|
||
|
static readonly Type refByte = typeof(byte[]).MakeByRefType();
|
||
|
static readonly Type refInt = typeof(int).MakeByRefType();
|
||
|
static readonly Type refKvp = typeof(KeyValuePair<int, int>).MakeByRefType();
|
||
|
static readonly MethodInfo getFormatterWithVerify = typeof(FormatterResolverExtensions).GetRuntimeMethods().First(x => x.Name == "GetFormatterWithVerify");
|
||
|
|
||
|
static readonly Func<Type, MethodInfo> getSerialize = t => typeof(IMessagePackFormatter<>).MakeGenericType(t).GetRuntimeMethod("Serialize", new[] { refByte, typeof(int), t, typeof(IFormatterResolver) });
|
||
|
static readonly Func<Type, MethodInfo> getDeserialize = t => typeof(IMessagePackFormatter<>).MakeGenericType(t).GetRuntimeMethod("Deserialize", new[] { typeof(byte[]), typeof(int), typeof(IFormatterResolver), refInt });
|
||
|
|
||
|
static readonly FieldInfo runtimeTypeHandleEqualityComparer = typeof(RuntimeTypeHandleEqualityComparer).GetRuntimeField("Default");
|
||
|
static readonly ConstructorInfo intIntKeyValuePairConstructor = typeof(KeyValuePair<int, int>).GetTypeInfo().DeclaredConstructors.First(x => x.GetParameters().Length == 2);
|
||
|
static readonly ConstructorInfo typeMapDictionaryConstructor = typeof(Dictionary<RuntimeTypeHandle, KeyValuePair<int, int>>).GetTypeInfo().DeclaredConstructors.First(x => { var p = x.GetParameters(); return p.Length == 2 && p[0].ParameterType == typeof(int); });
|
||
|
static readonly MethodInfo typeMapDictionaryAdd = typeof(Dictionary<RuntimeTypeHandle, KeyValuePair<int, int>>).GetRuntimeMethod("Add", new[] { typeof(RuntimeTypeHandle), typeof(KeyValuePair<int, int>) });
|
||
|
static readonly MethodInfo typeMapDictionaryTryGetValue = typeof(Dictionary<RuntimeTypeHandle, KeyValuePair<int, int>>).GetRuntimeMethod("TryGetValue", new[] { typeof(RuntimeTypeHandle), refKvp });
|
||
|
|
||
|
static readonly ConstructorInfo keyMapDictionaryConstructor = typeof(Dictionary<int, int>).GetTypeInfo().DeclaredConstructors.First(x => { var p = x.GetParameters(); return p.Length == 1 && p[0].ParameterType == typeof(int); });
|
||
|
static readonly MethodInfo keyMapDictionaryAdd = typeof(Dictionary<int, int>).GetRuntimeMethod("Add", new[] { typeof(int), typeof(int) });
|
||
|
static readonly MethodInfo keyMapDictionaryTryGetValue = typeof(Dictionary<int, int>).GetRuntimeMethod("TryGetValue", new[] { typeof(int), refInt });
|
||
|
|
||
|
static readonly MethodInfo objectGetType = typeof(object).GetRuntimeMethod("GetType", Type.EmptyTypes);
|
||
|
static readonly MethodInfo getTypeHandle = typeof(Type).GetRuntimeProperty("TypeHandle").GetGetMethod();
|
||
|
|
||
|
static readonly MethodInfo intIntKeyValuePairGetKey = typeof(KeyValuePair<int, int>).GetRuntimeProperty("Key").GetGetMethod();
|
||
|
static readonly MethodInfo intIntKeyValuePairGetValue = typeof(KeyValuePair<int, int>).GetRuntimeProperty("Value").GetGetMethod();
|
||
|
|
||
|
static readonly ConstructorInfo invalidOperationExceptionConstructor = typeof(System.InvalidOperationException).GetTypeInfo().DeclaredConstructors.First(x => { var p = x.GetParameters(); return p.Length == 1 && p[0].ParameterType == typeof(string); });
|
||
|
static readonly ConstructorInfo objectCtor = typeof(object).GetTypeInfo().DeclaredConstructors.First(x => x.GetParameters().Length == 0);
|
||
|
|
||
|
static class MessagePackBinaryTypeInfo
|
||
|
{
|
||
|
public static TypeInfo TypeInfo = typeof(MessagePackBinary).GetTypeInfo();
|
||
|
|
||
|
public static MethodInfo WriteFixedMapHeaderUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteFixedMapHeaderUnsafe", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WriteFixedArrayHeaderUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteFixedArrayHeaderUnsafe", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WriteMapHeader = typeof(MessagePackBinary).GetRuntimeMethod("WriteMapHeader", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WriteArrayHeader = typeof(MessagePackBinary).GetRuntimeMethod("WriteArrayHeader", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WritePositiveFixedIntUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WritePositiveFixedIntUnsafe", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WriteInt32 = typeof(MessagePackBinary).GetRuntimeMethod("WriteInt32", new[] { refByte, typeof(int), typeof(int) });
|
||
|
public static MethodInfo WriteBytes = typeof(MessagePackBinary).GetRuntimeMethod("WriteBytes", new[] { refByte, typeof(int), typeof(byte[]) });
|
||
|
public static MethodInfo WriteNil = typeof(MessagePackBinary).GetRuntimeMethod("WriteNil", new[] { refByte, typeof(int) });
|
||
|
public static MethodInfo ReadBytes = typeof(MessagePackBinary).GetRuntimeMethod("ReadBytes", new[] { typeof(byte[]), typeof(int), refInt });
|
||
|
public static MethodInfo ReadInt32 = typeof(MessagePackBinary).GetRuntimeMethod("ReadInt32", new[] { typeof(byte[]), typeof(int), refInt });
|
||
|
public static MethodInfo ReadString = typeof(MessagePackBinary).GetRuntimeMethod("ReadString", new[] { typeof(byte[]), typeof(int), refInt });
|
||
|
public static MethodInfo IsNil = typeof(MessagePackBinary).GetRuntimeMethod("IsNil", new[] { typeof(byte[]), typeof(int) });
|
||
|
public static MethodInfo ReadNextBlock = typeof(MessagePackBinary).GetRuntimeMethod("ReadNextBlock", new[] { typeof(byte[]), typeof(int) });
|
||
|
public static MethodInfo WriteStringUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteStringUnsafe", new[] { refByte, typeof(int), typeof(string), typeof(int) });
|
||
|
|
||
|
public static MethodInfo ReadArrayHeader = typeof(MessagePackBinary).GetRuntimeMethod("ReadArrayHeader", new[] { typeof(byte[]), typeof(int), refInt });
|
||
|
public static MethodInfo ReadMapHeader = typeof(MessagePackBinary).GetRuntimeMethod("ReadMapHeader", new[] { typeof(byte[]), typeof(int), refInt });
|
||
|
|
||
|
static MessagePackBinaryTypeInfo()
|
||
|
{
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
namespace MessagePack.Internal
|
||
|
{
|
||
|
// RuntimeTypeHandle can embed directly by OpCodes.Ldtoken
|
||
|
// It does not implements IEquatable<T>(but GetHashCode and Equals is implemented) so needs this to avoid boxing.
|
||
|
public class RuntimeTypeHandleEqualityComparer : IEqualityComparer<RuntimeTypeHandle>
|
||
|
{
|
||
|
public static IEqualityComparer<RuntimeTypeHandle> Default = new RuntimeTypeHandleEqualityComparer();
|
||
|
|
||
|
RuntimeTypeHandleEqualityComparer()
|
||
|
{
|
||
|
|
||
|
}
|
||
|
|
||
|
public bool Equals(RuntimeTypeHandle x, RuntimeTypeHandle y)
|
||
|
{
|
||
|
return x.Equals(y);
|
||
|
}
|
||
|
|
||
|
public int GetHashCode(RuntimeTypeHandle obj)
|
||
|
{
|
||
|
return obj.GetHashCode();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
internal class MessagePackDynamicUnionResolverException : Exception
|
||
|
{
|
||
|
public MessagePackDynamicUnionResolverException(string message)
|
||
|
: base(message)
|
||
|
{
|
||
|
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|