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TypeManager.cs
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2179 lines (1855 loc) · 61.5 KB
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using dnlib.DotNet;
using dnlib.DotNet.Emit;
namespace il2cpp
{
// 类型管理器
internal class TypeManager
{
public const string NsIl2cppRT = "il2cpprt";
// 当前环境
public readonly Il2cppContext Context;
public ICorLibTypes CorLibTypes => Context.CorLibTypes;
// 实例类型映射
private readonly Dictionary<string, TypeX> TypeMap = new Dictionary<string, TypeX>();
private readonly Dictionary<string, TypeX> RawTypeMap = new Dictionary<string, TypeX>();
public Dictionary<string, TypeX>.ValueCollection Types => TypeMap.Values;
// 方法表映射
private readonly Dictionary<string, MethodTable> MethodTableMap = new Dictionary<string, MethodTable>();
// 虚调用方法集合
private readonly HashSet<MethodX> VCallEntries = new HashSet<MethodX>();
// 方法待处理队列
private readonly Queue<MethodX> PendingMethods = new Queue<MethodX>();
// 协逆变映射
private class VarianceGroup
{
public bool IsProcessed;
public readonly HashSet<TypeX> TypeGroup = new HashSet<TypeX>();
public List<VarianceType> VarianceTypes;
}
private readonly Dictionary<TypeDef, VarianceGroup> VarianceMap = new Dictionary<TypeDef, VarianceGroup>();
private TypeDef ThrowHelperType;
private readonly HashSet<string> ResolvedExceptions = new HashSet<string>();
// 运行时装箱类型原型
private TypeDef BoxedTypePrototype;
// 运行时一维数组原型
private TypeDef SZArrayPrototype;
// 运行时多维数组原型映射
private readonly Dictionary<uint, TypeDef> MDArrayProtoMap = new Dictionary<uint, TypeDef>();
private DelegateProperty DelegateType;
public TypeX RTTypeHandle;
public TypeX RTMethodHandle;
public TypeX RTFieldHandle;
public TypeX RTTypedRef;
// 字符串对象是否已经解析
private bool IsStringTypeResolved;
public StringBuilder RecordLogs;
#if DEBUG && false
private void RecordResolvingMethod(MethodX metX)
{
if (RecordLogs == null)
RecordLogs = new StringBuilder();
string metDeclTypeName = metX.DeclType.GetNameKey();
string metName = metX.GetNameKey();
RecordLogs.AppendFormat(" * {0} -> {1}\n", metDeclTypeName, metName);
}
private void RecordAddingMethod(MethodX metX)
{
if (RecordLogs == null)
RecordLogs = new StringBuilder();
if (!PendingMethods.Contains(metX))
{
string metDeclTypeName = metX.DeclType.GetNameKey();
string metName = metX.GetNameKey();
RecordLogs.AppendFormat(" |- {0} -> {1}\n", metDeclTypeName, metName);
}
}
#else
private void RecordResolvingMethod(MethodX metX)
{
}
private void RecordAddingMethod(MethodX metX)
{
}
#endif
public TypeManager(Il2cppContext context)
{
Context = context;
}
public TypeX GetTypeByName(string name)
{
if (TypeMap.TryGetValue(name, out var tyX))
return tyX;
if (RawTypeMap.TryGetValue(name, out var tyXRaw))
return tyXRaw;
return null;
}
// 解析所有引用
public void ResolveAll()
{
while (PendingMethods.Count > 0)
{
do
{
MethodX metX = PendingMethods.Dequeue();
// 跳过不需要处理的方法
if (metX.IsSkipProcessing)
continue;
// 跳过已处理的方法
if (metX.IsProcessed)
continue;
// 设置已处理标记
metX.IsProcessed = true;
// 展开指令列表
BuildInstructions(metX);
}
while (PendingMethods.Count > 0);
// 解析协逆变
ResolveVariances();
// 解析虚调用
ResolveVCalls();
}
}
private void BuildInstructions(MethodX metX)
{
Debug.Assert(metX.InstList == null);
if (!metX.Def.HasBody || !metX.Def.Body.HasInstructions)
return;
RecordResolvingMethod(metX);
IGenericReplacer replacer = new GenericReplacer(metX.DeclType, metX);
var defInstList = metX.Def.Body.Instructions;
int numInsts = defInstList.Count;
InstInfo[] instList = new InstInfo[numInsts];
Dictionary<uint, int> offsetMap = new Dictionary<uint, int>();
List<InstInfo> branchInsts = new List<InstInfo>();
// 构建指令列表
for (int ip = 0; ip < numInsts; ++ip)
{
var defInst = defInstList[ip];
var inst = instList[ip] = new InstInfo();
inst.OpCode = defInst.OpCode;
inst.Operand = defInst.Operand;
inst.Offset = ip;
offsetMap.Add(defInst.Offset, ip);
switch (inst.OpCode.OperandType)
{
case OperandType.InlineBrTarget:
case OperandType.ShortInlineBrTarget:
case OperandType.InlineSwitch:
branchInsts.Add(inst);
break;
default:
ResolveOperand(inst, replacer);
break;
}
}
// 重定向跳转位置
foreach (var inst in branchInsts)
{
if (inst.Operand is Instruction defInst)
{
int target;
inst.Operand = target = offsetMap[defInst.Offset];
instList[target].IsBrTarget = true;
}
else if (inst.Operand is Instruction[] defInsts)
{
int[] insts = new int[defInsts.Length];
for (int i = 0; i < defInsts.Length; ++i)
{
int target;
insts[i] = target = offsetMap[defInsts[i].Offset];
instList[target].IsBrTarget = true;
}
inst.Operand = insts;
}
}
// 展开异常处理信息
if (metX.Def.Body.HasExceptionHandlers)
{
List<Tuple<int, ExHandlerInfo>> sortedHandlers = new List<Tuple<int, ExHandlerInfo>>();
int idx = 0;
foreach (var eh in metX.Def.Body.ExceptionHandlers)
{
ExHandlerInfo info = new ExHandlerInfo();
info.TryStart = offsetMap[eh.TryStart.Offset];
info.TryEnd = offsetMap[eh.TryEnd.Offset];
if (eh.FilterStart != null)
info.FilterStart = offsetMap[eh.FilterStart.Offset];
else
info.FilterStart = -1;
info.HandlerStart = offsetMap[eh.HandlerStart.Offset];
if (eh.HandlerEnd != null)
info.HandlerEnd = offsetMap[eh.HandlerEnd.Offset];
else
info.HandlerEnd = instList.Length;
if (eh.CatchType != null)
{
info.CatchType = ResolveTypeDefOrRef(eh.CatchType, replacer);
info.CatchType.NeedGenIsType = true;
}
info.HandlerType = eh.HandlerType;
sortedHandlers.Add(new Tuple<int, ExHandlerInfo>(idx++, info));
}
// 根据 try 位置排序, 如果相同则根据定义顺序排序
sortedHandlers.Sort((lhs, rhs) =>
{
int cmp = lhs.Item2.TryStart.CompareTo(rhs.Item2.TryStart);
if (cmp == 0)
{
cmp = rhs.Item2.TryEnd.CompareTo(lhs.Item2.TryEnd);
if (cmp == 0)
return lhs.Item1.CompareTo(rhs.Item1);
}
return cmp;
});
// 合并同范围的异常处理器
List<ExHandlerInfo> handlers = new List<ExHandlerInfo>();
ExHandlerInfo headInfo = null;
int count = sortedHandlers.Count;
for (int i = 0; i < count; ++i)
{
ExHandlerInfo currInfo = sortedHandlers[i].Item2;
if (headInfo != null && headInfo.NeedCombine(currInfo))
headInfo.CombinedHandlers.Add(currInfo);
else
{
headInfo = currInfo;
Debug.Assert(headInfo.CombinedHandlers.Count == 0);
headInfo.CombinedHandlers.Add(headInfo);
handlers.Add(headInfo);
}
instList[currInfo.HandlerOrFilterStart].IsBrTarget = true;
}
metX.ExHandlerList = handlers;
}
metX.InstList = instList;
}
private void ResolveOpCodeException(Code opCode)
{
switch (opCode)
{
case Code.Ckfinite:
ResolveExceptionType("ArithmeticException");
return;
case Code.Add_Ovf:
case Code.Add_Ovf_Un:
case Code.Sub_Ovf:
case Code.Sub_Ovf_Un:
case Code.Mul_Ovf:
case Code.Mul_Ovf_Un:
case Code.Conv_Ovf_I1:
case Code.Conv_Ovf_I2:
case Code.Conv_Ovf_I4:
case Code.Conv_Ovf_I8:
case Code.Conv_Ovf_U1:
case Code.Conv_Ovf_U2:
case Code.Conv_Ovf_U4:
case Code.Conv_Ovf_U8:
case Code.Conv_Ovf_I:
case Code.Conv_Ovf_U:
case Code.Conv_Ovf_I1_Un:
case Code.Conv_Ovf_I2_Un:
case Code.Conv_Ovf_I4_Un:
case Code.Conv_Ovf_I8_Un:
case Code.Conv_Ovf_U1_Un:
case Code.Conv_Ovf_U2_Un:
case Code.Conv_Ovf_U4_Un:
case Code.Conv_Ovf_U8_Un:
case Code.Conv_Ovf_I_Un:
case Code.Conv_Ovf_U_Un:
ResolveExceptionType("OverflowException");
return;
case Code.Unbox:
case Code.Unbox_Any:
case Code.Castclass:
ResolveExceptionType("InvalidCastException");
return;
}
}
private void ResolveOperand(InstInfo inst, IGenericReplacer replacer)
{
// 预处理指令
switch (inst.OpCode.Code)
{
case Code.Ldstr:
ResolveStringType();
break;
case Code.Newarr:
{
// newobj T[]::.ctor(int)
TypeSig elemSig = ((ITypeDefOrRef)inst.Operand).ToTypeSig();
inst.OpCode = OpCodes.Newobj;
inst.Operand = new MemberRefUser(
Context.CorLibModule,
".ctor",
MethodSig.CreateInstance(CorLibTypes.Void, CorLibTypes.Int32),
new TypeSpecUser(new SZArraySig(elemSig)));
}
break;
case Code.Ldelema:
{
// call T& T[]::Address(int)
TypeSig elemSig = ((ITypeDefOrRef)inst.Operand).ToTypeSig();
inst.OpCode = OpCodes.Call;
inst.Operand = new MemberRefUser(
Context.CorLibModule,
"Address",
MethodSig.CreateInstance(new ByRefSig(elemSig), CorLibTypes.Int32),
new TypeSpecUser(new SZArraySig(elemSig)));
}
break;
case Code.Ldelem_I1:
case Code.Ldelem_U1:
case Code.Ldelem_I2:
case Code.Ldelem_U2:
case Code.Ldelem_I4:
case Code.Ldelem_U4:
case Code.Ldelem_I8:
case Code.Ldelem_I:
case Code.Ldelem_R4:
case Code.Ldelem_R8:
case Code.Ldelem_Ref:
case Code.Ldelem:
{
TypeSig elemSig = null;
switch (inst.OpCode.Code)
{
case Code.Ldelem_I1:
elemSig = CorLibTypes.SByte;
break;
case Code.Ldelem_U1:
elemSig = CorLibTypes.Byte;
break;
case Code.Ldelem_I2:
elemSig = CorLibTypes.Int16;
break;
case Code.Ldelem_U2:
elemSig = CorLibTypes.UInt16;
break;
case Code.Ldelem_I4:
elemSig = CorLibTypes.Int32;
break;
case Code.Ldelem_U4:
elemSig = CorLibTypes.UInt32;
break;
case Code.Ldelem_I8:
elemSig = CorLibTypes.Int64;
break;
case Code.Ldelem_I:
elemSig = CorLibTypes.IntPtr;
break;
case Code.Ldelem_R4:
elemSig = CorLibTypes.Single;
break;
case Code.Ldelem_R8:
elemSig = CorLibTypes.Double;
break;
case Code.Ldelem_Ref:
elemSig = CorLibTypes.Object;
break;
case Code.Ldelem:
elemSig = ((ITypeDefOrRef)inst.Operand).ToTypeSig();
break;
}
// call T T[]::Get(int)
inst.OpCode = OpCodes.Call;
inst.Operand = new MemberRefUser(
Context.CorLibModule,
"Get",
MethodSig.CreateInstance(elemSig, CorLibTypes.Int32),
new TypeSpecUser(new SZArraySig(elemSig)));
}
break;
case Code.Stelem_I1:
case Code.Stelem_I2:
case Code.Stelem_I4:
case Code.Stelem_I8:
case Code.Stelem_I:
case Code.Stelem_R4:
case Code.Stelem_R8:
case Code.Stelem_Ref:
case Code.Stelem:
{
TypeSig elemSig = null;
switch (inst.OpCode.Code)
{
case Code.Stelem_I1:
elemSig = CorLibTypes.SByte;
break;
case Code.Stelem_I2:
elemSig = CorLibTypes.Int16;
break;
case Code.Stelem_I4:
elemSig = CorLibTypes.Int32;
break;
case Code.Stelem_I8:
elemSig = CorLibTypes.Int64;
break;
case Code.Stelem_I:
elemSig = CorLibTypes.IntPtr;
break;
case Code.Stelem_R4:
elemSig = CorLibTypes.Single;
break;
case Code.Stelem_R8:
elemSig = CorLibTypes.Double;
break;
case Code.Stelem_Ref:
elemSig = CorLibTypes.Object;
break;
case Code.Stelem:
elemSig = ((ITypeDefOrRef)inst.Operand).ToTypeSig();
break;
}
// call void T[]::Set(int,T)
inst.OpCode = OpCodes.Call;
inst.Operand = new MemberRefUser(
Context.CorLibModule,
"Set",
MethodSig.CreateInstance(CorLibTypes.Void, CorLibTypes.Int32, elemSig),
new TypeSpecUser(new SZArraySig(elemSig)));
}
break;
}
bool isLdtoken = inst.OpCode.Code == Code.Ldtoken;
var operType = inst.OpCode.OperandType;
Debug.Assert(operType == OperandType.InlineTok == isLdtoken);
if (isLdtoken)
{
switch (inst.Operand)
{
case MemberRef memRef:
if (memRef.IsMethodRef)
operType = OperandType.InlineMethod;
else
{
Debug.Assert(memRef.IsFieldRef);
operType = OperandType.InlineField;
}
break;
case MethodDef _:
case MethodSpec _:
operType = OperandType.InlineMethod;
break;
case FieldDef _:
operType = OperandType.InlineField;
break;
case TypeDef _:
case TypeRef _:
case TypeSpec _:
operType = OperandType.InlineType;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
switch (operType)
{
case OperandType.InlineMethod:
{
MethodX resMetX;
switch (inst.Operand)
{
case MethodDef metDef:
resMetX = ResolveMethodDef(metDef);
break;
case MemberRef memRef:
resMetX = ResolveMethodRef(memRef, replacer);
break;
case MethodSpec metSpec:
resMetX = ResolveMethodSpec(metSpec, replacer);
break;
default:
throw new ArgumentOutOfRangeException();
}
bool isReAddMethod = false;
if (inst.OpCode.Code == Code.Newobj)
{
Debug.Assert(!resMetX.Def.IsStatic);
Debug.Assert(resMetX.Def.IsConstructor);
// 设置实例化标记
resMetX.DeclType.IsInstantiated = true;
// 生成静态构造和终结器
GenStaticCctor(resMetX.DeclType);
GenFinalizer(resMetX.DeclType);
}
else if (inst.OpCode.Code == Code.Callvirt ||
inst.OpCode.Code == Code.Ldvirtftn)
{
if (resMetX.IsVirtual)
AddVCallEntry(resMetX);
else
{
// 非虚方法重定向指令
inst.OpCode = inst.OpCode.Code == Code.Callvirt ?
OpCodes.Call : OpCodes.Ldftn;
}
}
else if (resMetX.IsVirtual &&
(inst.OpCode.Code == Code.Call ||
inst.OpCode.Code == Code.Ldftn))
{
// 处理方法替换
if (resMetX.DeclType.QueryCallReplace(this, resMetX.Def, out TypeX implTyX, out var implDef))
{
resMetX.IsSkipProcessing = true;
Debug.Assert(implTyX != null);
MethodX implMetX = MakeMethodX(implTyX, implDef, resMetX.GenArgs);
resMetX = implMetX;
}
else
isReAddMethod = true;
}
else
isReAddMethod = true;
if (isReAddMethod)
{
// 尝试重新加入处理队列
resMetX.IsSkipProcessing = false;
AddPendingMethod(resMetX);
}
if (resMetX.IsStatic)
{
// 生成静态构造
GenStaticCctor(resMetX.DeclType);
}
if (isLdtoken)
resMetX.NeedGenMetadata = true;
inst.Operand = resMetX;
}
break;
case OperandType.InlineField:
{
FieldX resFldX;
switch (inst.Operand)
{
case FieldDef fldDef:
resFldX = ResolveFieldDef(fldDef);
break;
case MemberRef memRef:
resFldX = ResolveFieldRef(memRef, replacer);
break;
default:
throw new ArgumentOutOfRangeException();
}
if (resFldX.IsStatic)
{
// 生成静态构造
GenStaticCctor(resFldX.DeclType);
}
if (isLdtoken)
resFldX.NeedGenMetadata = true;
inst.Operand = resFldX;
}
break;
case OperandType.InlineType:
{
ITypeDefOrRef tyDefRef = (ITypeDefOrRef)inst.Operand;
bool isKeepToken = false;
// 无法解析的类型保持原始形态
switch (tyDefRef)
{
case TypeDef tyDef:
if (tyDef.HasGenericParameters)
isKeepToken = true;
break;
case TypeRef tyRef:
if (tyRef.Resolve().HasGenericParameters)
isKeepToken = true;
break;
case TypeSpec tySpec:
switch (tySpec.TypeSig)
{
case TypeDefOrRefSig _:
case GenericInstSig _:
case SZArraySig _:
case ArraySig _:
case GenericVar _:
case GenericMVar _:
break;
case CModReqdSig modReqdSig:
tyDefRef = modReqdSig.RemoveModifiers().ToTypeDefOrRef();
break;
case CModOptSig modOptSig:
tyDefRef = modOptSig.RemoveModifiers().ToTypeDefOrRef();
break;
default:
isKeepToken = true;
break;
}
break;
}
if (!isKeepToken)
{
TypeX resTyX = ResolveTypeDefOrRef(tyDefRef, replacer);
switch (inst.OpCode.Code)
{
case Code.Box:
case Code.Unbox:
case Code.Unbox_Any:
case Code.Isinst:
case Code.Castclass:
case Code.Constrained:
if (resTyX.IsValueType)
{
if (resTyX.IsNullableType)
{
if (resTyX.NullableElem == null)
{
// 解析可空类型的所有字段
ResolveAllFields(resTyX);
resTyX.NullableElem = ResolveTypeDefOrRef(resTyX.GenArgs[0].ToTypeDefOrRef(), null);
ResolveBoxedType(resTyX.NullableElem);
}
}
else
ResolveBoxedType(resTyX);
}
break;
}
switch (inst.OpCode.Code)
{
case Code.Unbox:
case Code.Unbox_Any:
case Code.Isinst:
case Code.Castclass:
{
TypeX tempTyX = resTyX;
if (tempTyX.IsNullableType)
tempTyX = tempTyX.NullableElem;
if (tempTyX.IsValueType && tempTyX.BoxedType != null)
tempTyX = tempTyX.BoxedType;
tempTyX.NeedGenIsType = true;
}
break;
}
if (isLdtoken)
resTyX.NeedGenMetadata = true;
inst.Operand = resTyX;
}
}
break;
case OperandType.InlineSig:
{
throw new NotImplementedException();
}
}
// 后处理指令
switch (inst.OpCode.Code)
{
case Code.Sizeof:
ResolveAllFields((TypeX)inst.Operand);
break;
case Code.Ldtoken:
switch (operType)
{
case OperandType.InlineType:
{
if (inst.Operand is TypeX opTyX)
ResolveAllFields(opTyX);
//! ResolveAllMethods
if (RTTypeHandle == null)
{
RTTypeHandle = ResolveTypeDefOrRef(CorLibTypes.GetTypeRef("System", "RuntimeTypeHandle").Resolve(), null);
ResolveAllFields(RTTypeHandle);
}
}
break;
case OperandType.InlineMethod:
if (RTMethodHandle == null)
{
RTMethodHandle = ResolveTypeDefOrRef(CorLibTypes.GetTypeRef("System", "RuntimeMethodHandle").Resolve(), null);
ResolveAllFields(RTMethodHandle);
}
break;
case OperandType.InlineField:
if (RTFieldHandle == null)
{
RTFieldHandle = ResolveTypeDefOrRef(CorLibTypes.GetTypeRef("System", "RuntimeFieldHandle").Resolve(), null);
ResolveAllFields(RTFieldHandle);
}
break;
}
break;
case Code.Mkrefany:
if (RTTypedRef == null)
{
RTTypedRef = ResolveTypeDefOrRef(CorLibTypes.GetTypeRef("System", "TypedReference").Resolve(), null);
ResolveAllFields(RTTypedRef);
}
break;
}
ResolveOpCodeException(inst.OpCode.Code);
}
private void GenStaticCctor(TypeX tyX)
{
if (tyX.IsCctorGenerated)
return;
tyX.IsCctorGenerated = true;
MethodDef cctor = tyX.Def.Methods.FirstOrDefault(met => met.IsStatic && met.IsConstructor);
if (cctor != null)
{
MethodX metX = new MethodX(tyX, cctor);
tyX.CctorMethod = AddMethod(metX);
}
}
private void GenFinalizer(TypeX tyX)
{
tyX.GenFinalizerMethod(this);
}
private void AddVCallEntry(MethodX virtMetX)
{
// 跳过该方法的处理
virtMetX.IsSkipProcessing = true;
// 登记到虚入口
VCallEntries.Add(virtMetX);
}
private void ResolveVCalls()
{
foreach (MethodX virtMetX in VCallEntries)
{
TypeX entryTyX = virtMetX.DeclType;
MethodDef entryDef = virtMetX.Def;
// 在虚入口所在类型内解析虚方法
if (entryTyX.IsInstantiated)
ResolveVMethod(virtMetX, entryTyX, entryTyX, entryDef);
// 在继承类型内解析虚方法
foreach (TypeX derivedTyX in entryTyX.DerivedTypes)
ResolveVMethod(virtMetX, derivedTyX, entryTyX, entryDef);
}
}
private void ResolveVMethod(
MethodX virtMetX,
TypeX derivedTyX,
TypeX entryTyX,
MethodDef entryDef)
{
// 跳过没有实例化的类型
if (!derivedTyX.IsInstantiated)
return;
RecordResolvingMethod(virtMetX);
// 查询虚方法绑定
derivedTyX.QueryCallVirt(this, entryTyX, entryDef, out TypeX implTyX, out var implDef);
// 构造实现方法
Debug.Assert(implTyX != null);
MethodX implMetX = MakeMethodX(implTyX, implDef, virtMetX.GenArgs);
// 关联实现方法到虚方法
virtMetX.AddOverrideImpl(implMetX, derivedTyX);
// 处理该方法
implMetX.IsSkipProcessing = false;
AddPendingMethod(implMetX);
}
public FieldX ResolveFieldDef(FieldDef fldDef)
{
TypeX declType = ResolveTypeDefOrRef(fldDef.DeclaringType, null);
FieldX fldX = new FieldX(declType, fldDef);
return AddField(fldX);
}
public FieldX ResolveFieldRef(MemberRef memRef, IGenericReplacer replacer)
{
Debug.Assert(memRef.IsFieldRef);
TypeX declType = ResolveTypeDefOrRef(memRef.DeclaringType, replacer);
FieldX fldX = new FieldX(declType, memRef.ResolveField());
return AddField(fldX);
}
private FieldX AddField(FieldX fldX)
{
Debug.Assert(fldX != null);
// 尝试添加到所属类型
string nameKey = fldX.GetNameKey();
if (fldX.DeclType.GetField(nameKey, out var ofldX))
return ofldX;
fldX.DeclType.AddField(nameKey, fldX);
IGenericReplacer replacer = new GenericReplacer(fldX.DeclType, null);
// 展开字段类型
fldX.FieldType = Helper.ReplaceGenericSig(fldX.Def.FieldType, replacer);
return fldX;
}
// 解析方法定义并添加
public MethodX ResolveMethodDef(MethodDef metDef)
{
TypeX declType = ResolveTypeDefOrRef(metDef.DeclaringType, null);
MethodX metX = new MethodX(declType, metDef);
return AddMethod(metX);
}
// 解析方法引用并添加
public MethodX ResolveMethodRef(MemberRef memRef, IGenericReplacer replacer)
{
Debug.Assert(memRef.IsMethodRef);
TypeX declType = ResolveTypeDefOrRef(memRef.DeclaringType, replacer);
MethodDef metDef = declType.Def.FindMethod(memRef.Name, memRef.MethodSig);
if (metDef == null)
metDef = declType.Def.FindMethod(memRef.Name);
if (metDef == null)
metDef = memRef.ResolveMethod();
if (metDef == null)
throw new NotImplementedException();
if (metDef.DeclaringType != declType.Def)
{
// 处理引用类型不包含该方法的情况
declType = declType.FindBaseType(metDef.DeclaringType);
Debug.Assert(declType != null);
}
MethodX metX = new MethodX(declType, metDef);
return AddMethod(metX);
}
// 解析泛型方法并添加
public MethodX ResolveMethodSpec(MethodSpec metSpec, IGenericReplacer replacer)
{
TypeX declType = ResolveTypeDefOrRef(metSpec.DeclaringType, replacer);
MethodDef metDef = metSpec.ResolveMethodDef();
if (metDef.DeclaringType != declType.Def)
{
// 处理引用类型不包含该方法的情况
declType = declType.FindBaseType(metDef.DeclaringType);
Debug.Assert(declType != null);
}
var metGenArgs = metSpec.GenericInstMethodSig?.GenericArguments;
Debug.Assert(metGenArgs != null);
IList<TypeSig> genArgs = Helper.ReplaceGenericSigList(metGenArgs, replacer);
MethodX metX = new MethodX(declType, metDef);
metX.GenArgs = genArgs;
return AddMethod(metX);
}
// 添加方法到类型
public MethodX AddMethod(MethodX metX)
{
Debug.Assert(metX != null);
// 尝试添加到所属类型
string nameKey = metX.GetNameKey();
if (metX.DeclType.GetMethod(nameKey, out var ometX))
return ometX;
metX.DeclType.AddMethod(nameKey, metX);
IGenericReplacer replacer = new GenericReplacer(metX.DeclType, metX);
// 展开返回值和参数类型
metX.ReturnType = Helper.ReplaceGenericSig(metX.DefSig.RetType, replacer);
metX.ParamTypes = Helper.ReplaceGenericSigList(metX.DefSig.Params, replacer);
if (metX.HasThis)
metX.ParamTypes.Insert(0, Helper.ReplaceGenericSig(metX.DeclType.GetThisTypeSig(), replacer));
metX.ParamAfterSentinel = Helper.ReplaceGenericSigList(metX.DefSig.ParamsAfterSentinel, replacer);
MethodDef metDef = metX.Def;
if (metDef.HasBody)
{
if (metDef.Body.HasVariables)
{
metX.LocalTypes = new List<TypeSig>();
foreach (var loc in metDef.Body.Variables)
{
Debug.Assert(loc.Index == metX.LocalTypes.Count);
metX.LocalTypes.Add(loc.Type);
}
// 展开局部变量类型
metX.LocalTypes = Helper.ReplaceGenericSigList(metX.LocalTypes, replacer);
}
}
// 添加到待处理队列
AddPendingMethod(metX);
return metX;
}
private void AddPendingMethod(MethodX metX)
{
if (!metX.IsProcessed)
{
RecordAddingMethod(metX);
PendingMethods.Enqueue(metX);
}
}
private void ExpandType(TypeX tyX)
{
IGenericReplacer replacer = new GenericReplacer(tyX, null);
// 解析基类
if (tyX.Def.BaseType != null)
{
tyX.BaseType = ResolveTypeDefOrRef(tyX.Def.BaseType, replacer);