| public ResolveMember ( int metadataToken ) : MemberInfo | ||
| metadataToken | int | |
| return | MemberInfo | |
public static MemberInfo ResolveMember(Module module, int metadataToken)
{
Assumes.NotNull(module);
Assumes.IsTrue(metadataToken != 0);
return module.ResolveMember(metadataToken);
}
/// <summary>
/// Constructs the array of ILInstructions according to the IL byte code.
/// </summary>
/// <param name="module"></param>
private void ConstructInstructions(Module module)
{
byte[] il = this.il;
int position = 0;
instructions = new List<ILInstruction>();
while (position < il.Length)
{
ILInstruction instruction = new ILInstruction();
// get the operation code of the current instruction
OpCode code = OpCodes.Nop;
ushort value = il[position++];
if (value != 0xfe)
{
code = Globals.singleByteOpCodes[(int)value];
}
else
{
value = il[position++];
code = Globals.multiByteOpCodes[(int)value];
value = (ushort)(value | 0xfe00);
}
instruction.Code = code;
instruction.Offset = position - 1;
int metadataToken = 0;
// get the operand of the current operation
switch (code.OperandType)
{
case OperandType.InlineBrTarget:
metadataToken = ReadInt32(il, ref position);
metadataToken += position;
instruction.Operand = metadataToken;
break;
// patched from comments on CP -hwd
case OperandType.InlineField:
metadataToken = ReadInt32(il, ref position);
if (mi is ConstructorInfo)
{
instruction.Operand = module.ResolveField(metadataToken,
mi.DeclaringType.GetGenericArguments(), null);
}
else
{
instruction.Operand = module.ResolveField(metadataToken,
mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
break;
// patched from comments on CP -hwd
case OperandType.InlineMethod:
metadataToken = ReadInt32(il, ref position);
try
{
if (mi is ConstructorInfo)
{
instruction.Operand = module.ResolveMethod(metadataToken,
mi.DeclaringType.GetGenericArguments(), null);
}
else
{
instruction.Operand = module.ResolveMethod(metadataToken,
mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
}
catch
{
if (mi is ConstructorInfo)
{
instruction.Operand = module.ResolveMember(metadataToken,
mi.DeclaringType.GetGenericArguments(), null);
}
else
{
instruction.Operand = module.ResolveMember(metadataToken,
mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
}
break;
case OperandType.InlineSig:
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveSignature(metadataToken);
break;
// patched from comments on CP -hwd
case OperandType.InlineTok:
metadataToken = ReadInt32(il, ref position);
//try
//{
if (mi is ConstructorInfo)
{
instruction.Operand = module.ResolveType(metadataToken,
mi.DeclaringType.GetGenericArguments(), null);
}
else
{
instruction.Operand = module.ResolveType(metadataToken,
mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
//}
//catch
//{
// int i = 1;
//}
break;
// patched from comments on CP -hwd
case OperandType.InlineType:
metadataToken = ReadInt32(il, ref position);
if (this.mi is MethodInfo)
{
instruction.Operand = module.ResolveType(metadataToken,
this.mi.DeclaringType.GetGenericArguments(), this.mi.GetGenericArguments());
}
else if (mi is ConstructorInfo)
{
instruction.Operand = module.ResolveType(metadataToken,
this.mi.DeclaringType.GetGenericArguments(), null);
}
else
{
instruction.Operand = module.ResolveType(metadataToken);
}
break;
case OperandType.InlineI:
{
instruction.Operand = ReadInt32(il, ref position);
break;
}
case OperandType.InlineI8:
{
instruction.Operand = ReadInt64(il, ref position);
break;
}
case OperandType.InlineNone:
{
instruction.Operand = null;
break;
}
case OperandType.InlineR:
{
instruction.Operand = ReadDouble(il, ref position);
break;
}
case OperandType.InlineString:
{
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveString(metadataToken);
break;
}
case OperandType.InlineSwitch:
{
int count = ReadInt32(il, ref position);
int[] casesAddresses = new int[count];
for (int i = 0; i < count; i++)
{
casesAddresses[i] = ReadInt32(il, ref position);
}
int[] cases = new int[count];
for (int i = 0; i < count; i++)
{
cases[i] = position + casesAddresses[i];
}
break;
}
case OperandType.InlineVar:
{
instruction.Operand = ReadUInt16(il, ref position);
break;
}
case OperandType.ShortInlineBrTarget:
{
instruction.Operand = ReadSByte(il, ref position) + position;
break;
}
case OperandType.ShortInlineI:
{
instruction.Operand = ReadSByte(il, ref position);
break;
}
case OperandType.ShortInlineR:
{
instruction.Operand = ReadSingle(il, ref position);
break;
}
case OperandType.ShortInlineVar:
{
instruction.Operand = ReadByte(il, ref position);
break;
}
default:
{
throw new Exception("Unknown operand type.");
}
}
instructions.Add(instruction);
}
}
/// <summary>
/// Constructs the array of ILInstructions according to the IL byte code.
/// </summary>
/// <param name="module"></param>
private void ConstructInstructions(Module module)
{
byte[] il = this.il;
int position = 0;
instructions = new List<ILInstruction>();
while (position < il.Length)
{
ILInstruction instruction = new ILInstruction();
// get the operation code of the current instruction
OpCode code = OpCodes.Nop;
ushort value = il[position++];
if (value != 0xfe)
{
code = Globals.singleByteOpCodes[(int)value];
}
else
{
value = il[position++];
code = Globals.multiByteOpCodes[(int)value];
value = (ushort)(value | 0xfe00);
}
instruction.Code = code;
instruction.Offset = position - 1;
int metadataToken = 0;
// get the operand of the current operation
switch (code.OperandType)
{
case OperandType.InlineBrTarget:
metadataToken = ReadInt32(il, ref position);
metadataToken += position;
instruction.Operand = metadataToken;
break;
case OperandType.InlineField:
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveField(metadataToken);
break;
case OperandType.InlineMethod:
metadataToken = ReadInt32(il, ref position);
try
{
instruction.Operand = module.ResolveMethod(metadataToken);
}
catch
{
try
{
instruction.Operand = module.ResolveMember(metadataToken);
}
catch (Exception)
{
//Try generic method
try
{
instruction.Operand = module.ResolveMethod(metadataToken, mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
catch (Exception)
{
//Try generic member
try
{
instruction.Operand = module.ResolveMember(metadataToken, mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
}
catch (Exception)
{
throw;
}
}
}
}
break;
case OperandType.InlineSig:
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveSignature(metadataToken);
break;
case OperandType.InlineTok:
metadataToken = ReadInt32(il, ref position);
try
{
instruction.Operand = module.ResolveType(metadataToken);
}
catch
{
}
// SSS : see what to do here
break;
case OperandType.InlineType:
metadataToken = ReadInt32(il, ref position);
// now we call the ResolveType always using the generic attributes type in order
// to support decompilation of generic methods and classes
// thanks to the guys from code project who commented on this missing feature
try
{
instruction.Operand = module.ResolveType(metadataToken);
}
catch (Exception)
{
instruction.Operand = module.ResolveType(metadataToken, this.mi.DeclaringType.GetGenericArguments(), this.mi.GetGenericArguments());
}
break;
case OperandType.InlineI:
{
instruction.Operand = ReadInt32(il, ref position);
break;
}
case OperandType.InlineI8:
{
instruction.Operand = ReadInt64(il, ref position);
break;
}
case OperandType.InlineNone:
{
instruction.Operand = null;
break;
}
case OperandType.InlineR:
{
instruction.Operand = ReadDouble(il, ref position);
break;
}
case OperandType.InlineString:
{
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveString(metadataToken);
break;
}
case OperandType.InlineSwitch:
{
int count = ReadInt32(il, ref position);
int[] casesAddresses = new int[count];
for (int i = 0; i < count; i++)
{
casesAddresses[i] = ReadInt32(il, ref position);
}
int[] cases = new int[count];
for (int i = 0; i < count; i++)
{
cases[i] = position + casesAddresses[i];
}
break;
}
case OperandType.InlineVar:
{
instruction.Operand = ReadUInt16(il, ref position);
break;
}
case OperandType.ShortInlineBrTarget:
{
instruction.Operand = ReadSByte(il, ref position) + position;
break;
}
case OperandType.ShortInlineI:
{
instruction.Operand = ReadSByte(il, ref position);
break;
}
case OperandType.ShortInlineR:
{
instruction.Operand = ReadSingle(il, ref position);
break;
}
case OperandType.ShortInlineVar:
{
instruction.Operand = ReadByte(il, ref position);
break;
}
default:
{
throw new Exception("Unknown operand type.");
}
}
instructions.Add(instruction);
}
}
void CopyOpcode(byte[] Bytes, ref int i, ILGenerator Gen, Module Origin, List<int> ExceptionTrinkets, Dictionary<int, Label[]> LabelOrigins)
{
OpCode Code = GetOpcode(Bytes, ref i);
// These are emitted by exception handling copier if an exception
// block is imminent. If not, copy them as usual.
if(Code == OpCodes.Leave && ExceptionTrinkets.Contains(i + 5))
{
i += 4;
return;
}
else if(Code == OpCodes.Leave_S && ExceptionTrinkets.Contains(i + 2))
{
// This is a rather tricky one. See the comment preceding the call to MineLabels above.
i++;
return;
}
else if(Code == OpCodes.Endfinally && ExceptionTrinkets.Contains(i+1)) return;
switch(Code.OperandType)
{
// If no argument, then re-emit the opcode
case OperandType.InlineNone:
{
Gen.Emit(Code);
break;
}
// If argument is a method, re-emit the method reference
case OperandType.InlineMethod:
{
int Token = BitHelper.ReadInteger(Bytes, ref i);
MethodBase Base = Origin.ResolveMethod(Token);
if(Base is MethodInfo)
Gen.Emit(Code, GrabMethod(Base as MethodInfo));
else if(Base is ConstructorInfo)
Gen.Emit(Code, GrabConstructor(Base as ConstructorInfo));
else throw new InvalidOperationException("Inline method is neither method nor constructor.");
break;
}
// Argument is a field reference
case OperandType.InlineField:
{
int Token = BitHelper.ReadInteger(Bytes, ref i);
FieldInfo Field = Origin.ResolveField(Token);
Gen.Emit(Code, GrabField(Field));
break;
}
// Argument is a type reference
case OperandType.InlineType:
{
int Token = BitHelper.ReadInteger(Bytes, ref i);
Type Ref = Origin.ResolveType(Token);
Gen.Emit(Code, GrabType(Ref));
break;
}
// Argument is an inline string
case OperandType.InlineString:
{
int Token = BitHelper.ReadInteger(Bytes, ref i);
string Copy = Origin.ResolveString(Token);
Gen.Emit(Code, Copy);
break;
}
// Argument is a metadata token
case OperandType.InlineTok:
{
int Token = BitHelper.ReadInteger(Bytes, ref i);
MemberInfo Info = Origin.ResolveMember(Token);
if(Info.MemberType == MemberTypes.Field)
{
if(Code != OpCodes.Ldtoken || !TryReplaceBackingField(Bytes, i, Gen, Origin))
Gen.Emit(Code, GrabField(Info as FieldInfo));
}
else if(Info.MemberType == MemberTypes.Method)
Gen.Emit(Code, GrabMethod(Info as MethodInfo));
else if(Info.MemberType == MemberTypes.TypeInfo || Info.MemberType == MemberTypes.NestedType)
Gen.Emit(Code, GrabType(Info as Type));
else throw new InvalidOperationException("Inline token is neither field, nor method, nor type");
break;
}
// Argument is a switch map
case OperandType.InlineSwitch:
{
if(!LabelOrigins.ContainsKey(i))
throw new Exception("No switchmap found for RVA "+i.ToString("X"));
Label[] Labels = LabelOrigins[i];
i += 4 + Labels.Length*4;
Gen.Emit(Code, Labels);
break;
}
// Argument is a single-byte branch target
case OperandType.ShortInlineBrTarget:
{
if(!LabelOrigins.ContainsKey(i))
throw new Exception("No label origin found for RVA "+i.ToString("X"));
Gen.Emit(Code, LabelOrigins[i][0]);
i++;
break;
}
// Argument is a byte
case OperandType.ShortInlineI:
case OperandType.ShortInlineVar:
{
Gen.Emit(Code, Bytes[++i]);
break;
}
// Argument is a short
case OperandType.InlineVar:
{
Gen.Emit(Code, BitHelper.ReadShort(Bytes, ref i));
break;
}
case OperandType.InlineBrTarget:
{
if(!LabelOrigins.ContainsKey(i))
throw new Exception("No label origin found for RVA "+i.ToString("X"));
Gen.Emit(Code, LabelOrigins[i][0]);
i += 4;
break;
}
// Argument is a 32-bit integer
case OperandType.InlineI:
case OperandType.ShortInlineR: // This is actually a 32-bit float, but we don't care
{
Gen.Emit(Code, BitHelper.ReadInteger(Bytes, ref i));
break;
}
// Argument is a 64-bit integer
case OperandType.InlineI8:
{
Gen.Emit(Code, BitHelper.ReadLong(Bytes, ref i));
break;
}
// Argument is a 64-bit float
case OperandType.InlineR:
{
Gen.Emit(Code, BitHelper.ReadDouble(Bytes, ref i));
break;
}
// If ever we run across OpCodes.Calli this'll probably happen
default:
throw new InvalidOperationException("The method copier ran across an unknown opcode.");
}
}
/// <summary>
/// Resolves all MetadataTokens present in <see cref="cgm"/> using the <see cref="manifestModule"/>
/// </summary>
/// <param name="cgm"></param>
/// <param name="manifestModule"></param>
/// <param name="memberInfoCache">
/// Optional cache dictionary for use when this is being called within a loop, helps performance.
/// </param>
/// <param name="ignoreAssemblyFullNames">
/// Optional list of fully-qualified assembly names whose members should NOT be added (e.g. mscorlib).
/// </param>
/// <param name="maxErrors">The max number of exceptions to be incurred before abandoning.</param>
/// <returns>Count of errors encountered, will range from 0 to <see cref="maxErrors"/></returns>
public static int ResolveCgMemberMetadataTokens(CgMember cgm, Module manifestModule,
Dictionary<int, MemberInfo> memberInfoCache, string[] ignoreAssemblyFullNames, int maxErrors = 5)
{
if (cgm == null)
return maxErrors;
if (manifestModule == null)
return maxErrors;
var errorCount = 0;
//for each method, get all invoked metadata tokens
foreach (var metadataToken in cgm.opCodeCallsAndCallvirtsMetadatTokens)
{
try
{
MemberInfo runtimeMem = null;
//resolve invoked metadata token to a member type
if (memberInfoCache != null && memberInfoCache.ContainsKey(metadataToken))
{
runtimeMem = memberInfoCache[metadataToken];
}
else
{
runtimeMem = manifestModule.ResolveMember(metadataToken);
}
if (runtimeMem == null)
continue;
var declaringType = runtimeMem.DeclaringType;
var declaringTypeAsmName = declaringType?.AssemblyQualifiedName;
if (string.IsNullOrWhiteSpace(declaringTypeAsmName))
continue;
if (ignoreAssemblyFullNames != null && ignoreAssemblyFullNames.Any(declaringTypeAsmName.EndsWith))
continue;
//add to cache for performance
if (memberInfoCache != null && !memberInfoCache.ContainsKey(metadataToken))
memberInfoCache.Add(metadataToken, runtimeMem);
var runtimeMi = runtimeMem as MethodInfo;
if (runtimeMi != null)
{
var ncgm = GetAsCgMember(runtimeMi, false);
if (ncgm == null)
continue;
ncgm.MetadataToken = metadataToken;
ncgm.DeclaringTypeAsmName = declaringTypeAsmName;
cgm.OpCodeCallAndCallvirts.Add(ncgm);
continue;
}
var runtimePi = runtimeMem as PropertyInfo;
if (runtimePi != null)
{
var ncgm = GetAsCgMember(runtimePi, false, null);
if (ncgm == null)
continue;
ncgm.MetadataToken = metadataToken;
ncgm.DeclaringTypeAsmName = declaringTypeAsmName;
cgm.OpCodeCallAndCallvirts.Add(ncgm);
continue;
}
var runtimeFi = runtimeMem as FieldInfo;
if (runtimeFi == null)
continue;
var fiCgm = GetAsCgMember(runtimeFi, false, null);
if (fiCgm == null)
continue;
fiCgm.MetadataToken = metadataToken;
fiCgm.DeclaringTypeAsmName = declaringTypeAsmName;
cgm.OpCodeCallAndCallvirts.Add(fiCgm);
}
catch
{
errorCount += 1;
if (errorCount > maxErrors)
break;
}
}
return errorCount;
}
private static int _ReadOperand(MethodBase This, OpCode code, int position, byte[] il, Module module, ILInstruction instruction)
{
int metadataToken;
switch (code.OperandType)
{
case OperandType.InlineBrTarget: {
metadataToken = ReadInt32(il, ref position);
metadataToken += position;
instruction.Operand = metadataToken;
break;
}
case OperandType.InlineField: {
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveField(metadataToken);
break;
}
case OperandType.InlineMethod: {
metadataToken = ReadInt32(il, ref position);
try {
instruction.Operand = module.ResolveMethod(metadataToken);
} catch {
instruction.Operand = module.ResolveMember(metadataToken);
}
break;
}
case OperandType.InlineSig: {
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveSignature(metadataToken);
break;
}
case OperandType.InlineTok: {
metadataToken = ReadInt32(il, ref position);
try {
instruction.Operand = module.ResolveType(metadataToken);
} catch { }
// SSS : see what to do here
break;
}
case OperandType.InlineType: {
metadataToken = ReadInt32(il, ref position);
// now we call the ResolveType always using the generic attributes type in order
// to support decompilation of generic methods and classes
// thanks to the guys from code project who commented on this missing feature
instruction.Operand = module.ResolveType(metadataToken, This.DeclaringType.GetGenericArguments(), This.GetGenericArguments());
break;
}
case OperandType.InlineI: {
instruction.Operand = ReadInt32(il, ref position);
break;
}
case OperandType.InlineI8: {
instruction.Operand = ReadInt64(il, ref position);
break;
}
case OperandType.InlineNone: {
instruction.Operand = null;
break;
}
case OperandType.InlineR: {
instruction.Operand = ReadDouble(il, ref position);
break;
}
case OperandType.InlineString: {
metadataToken = ReadInt32(il, ref position);
instruction.Operand = module.ResolveString(metadataToken);
break;
}
case OperandType.InlineSwitch: {
var count = ReadInt32(il, ref position);
var casesAddresses = new int[count];
for (var i = 0; i < count; i++)
{
casesAddresses[i] = ReadInt32(il, ref position);
}
var cases = new int[count];
for (var i = 0; i < count; i++)
{
cases[i] = position + casesAddresses[i];
}
break;
}
case OperandType.InlineVar: {
instruction.Operand = ReadUInt16(il, ref position);
break;
}
case OperandType.ShortInlineBrTarget: {
instruction.Operand = ReadSByte(il, ref position) + position;
break;
}
case OperandType.ShortInlineI: {
if (instruction.Code == OpCodes.Ldc_I4_S)
{
instruction.Operand = ReadSByte(il, ref position);
}
else
{
instruction.Operand = ReadByte(il, ref position);
}
break;
}
case OperandType.ShortInlineR: {
instruction.Operand = ReadSingle(il, ref position);
break;
}
case OperandType.ShortInlineVar: {
instruction.Operand = ReadByte(il, ref position);
break;
}
default: {
throw new Exception("Unknown operand type.");
}
}
return(position);
}
private object ReadOperand(OpCode code, Module module, ref long localVariableIndex)
{
object operand = null;
switch (code.OperandType)
{
case OperandType.InlineNone:
break;
case OperandType.InlineSwitch:
int length = stream.ReadInt32();
int[] branches = new int[length];
int[] offsets = new int[length];
for (int i = 0; i < length; i++)
{
offsets[i] = stream.ReadInt32();
}
for (int i = 0; i < length; i++)
{
branches[i] = (int)stream.BaseStream.Position + offsets[i];
}
operand = (object) branches; // Just forget to save readed offsets
break;
case OperandType.ShortInlineBrTarget:
if (code.FlowControl != FlowControl.Branch && code.FlowControl != FlowControl.Cond_Branch)
{
operand = stream.ReadSByte();
}
else
{
operand = stream.ReadSByte() + stream.BaseStream.Position;
}
break;
case OperandType.InlineBrTarget:
operand = stream.ReadInt32()+ stream.BaseStream.Position;;
break;
case OperandType.ShortInlineI:
if (code == OpCodes.Ldc_I4_S)
operand = (sbyte)stream.ReadByte();
else
operand = stream.ReadByte();
break;
case OperandType.InlineI:
operand = stream.ReadInt32();
break;
case OperandType.ShortInlineR:
operand = stream.ReadSingle();
break;
case OperandType.InlineR:
operand = stream.ReadDouble();
break;
case OperandType.InlineI8:
operand = stream.ReadInt64();
break;
case OperandType.InlineSig:
operand = module.ResolveSignature(stream.ReadInt32());
break;
case OperandType.InlineString:
operand = module.ResolveString(stream.ReadInt32());
break;
case OperandType.InlineTok:
case OperandType.InlineType:
case OperandType.InlineMethod:
case OperandType.InlineField:
operand = module.ResolveMember(stream.ReadInt32(), typeArgs, methodArgs);
break;
case OperandType.ShortInlineVar:
{
int index = stream.ReadByte();
operand = GetVariable(code, index);
localVariableIndex = index;
}
break;
case OperandType.InlineVar:
{
int index = stream.ReadUInt16();
operand = GetVariable(code, index);
localVariableIndex = index;
}
break;
default:
throw new NotSupportedException();
}
return operand;
}
/// <summary>
/// Resolves the <see cref="tokenId"/>to a <see cref="MemberInfo"/> using
/// the <see cref="manifestModule"/>
/// </summary>
/// <param name="manifestModule"></param>
/// <param name="tokenId"></param>
/// <param name="mi"></param>
/// <param name="msgOut">Inteneded for debug trace from the Console.</param>
/// <returns></returns>
internal bool TryResolveRtMemberInfo(Module manifestModule, MetadataTokenId tokenId, out MemberInfo mi, StringBuilder msgOut)
{
mi = null;
if (manifestModule == null)
return false;
try
{
mi = manifestModule.ResolveMember(tokenId.Id);
}
catch (SystemException)//does not resolve the token
{
if (msgOut != null)
msgOut.Append(", Message: 'manifest module could not resolve id'");
return false;
}
return mi != null;
}
private IMemberReference FindMemberRef(uint metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
{
return(AssemblyManager.FindMember(_netModule.ResolveMember((int)metadataToken, genericTypeArguments, genericMethodArguments)));
}
