internal MethodIL/*?*/ GetMethodIL(
uint methodDefRowId
) {
MethodRow methodRow = this.MethodTable[methodDefRowId];
if (
(methodRow.ImplFlags & MethodImplFlags.CodeTypeMask) != MethodImplFlags.ILCodeType
|| methodRow.RVA == 0
) {
return null;
}
MemoryBlock memBlock = this.RVAToMemoryBlock(methodRow.RVA);
// Error need to check if the Memory Block is empty. This is calse for all the calls...
MemoryReader memReader = new MemoryReader(memBlock);
byte headByte = memReader.ReadByte();
if ((headByte & CILMethodFlags.ILFormatMask) == CILMethodFlags.ILTinyFormat) {
int size = headByte >> CILMethodFlags.ILTinyFormatSizeShift;
return new MethodIL(
true,
8,
0x00000000,
memReader.GetMemoryBlockAt(0, size),
null
);
} else if ((headByte & CILMethodFlags.ILFormatMask) != CILMethodFlags.ILFatFormat) {
// PEFileFormat Error...
return null;
}
// FatILFormat
byte headByte2 = memReader.ReadByte();
if ((headByte2 >> CILMethodFlags.ILFatFormatHeaderSizeShift) != CILMethodFlags.ILFatFormatHeaderSize) {
// PEFile Format Error...
return null;
}
bool localVarInited = (headByte & CILMethodFlags.ILInitLocals) == CILMethodFlags.ILInitLocals;
bool moreSectsPresent = (headByte & CILMethodFlags.ILMoreSects) == CILMethodFlags.ILMoreSects;
ushort maxStack = memReader.ReadUInt16();
int codeSize = memReader.ReadInt32();
uint localSignatureToken = memReader.ReadUInt32();
MemoryBlock ilCodeMemBlock = memReader.GetMemoryBlockAt(0, codeSize);
SEHTableEntry[]/*?*/ sehTableEntries = null;
if (moreSectsPresent) {
memReader.SkipBytes(codeSize);
memReader.Align(4);
byte sectHeader = memReader.ReadByte();
if ((sectHeader & CILMethodFlags.SectEHTable) != CILMethodFlags.SectEHTable) {
// PEFile Format Error...
return null;
}
bool sectFatFormat = (sectHeader & CILMethodFlags.SectFatFormat) == CILMethodFlags.SectFatFormat;
int dataSize = memReader.ReadByte();
if (sectFatFormat) {
dataSize += (int)memReader.ReadUInt16() << 8;
sehTableEntries = PEFileReader.GetFatSEHEntries(memReader, dataSize / 24);
} else {
memReader.SkipBytes(2); //skip over reserved field
sehTableEntries = PEFileReader.GetSmallSEHEntries(memReader, dataSize / 12);
}
}
return new MethodIL(
localVarInited,
maxStack,
localSignatureToken,
ilCodeMemBlock,
sehTableEntries
);
}
bool ReadStreamHeaders(
ref MemoryReader memReader
)
//^ requires this.ReaderState >= ReaderState.PEFile;
{
int numberOfStreams = this.StorageHeader.NumberOfStreams;
this.StreamHeaders = new StreamHeader[numberOfStreams];
StreamHeader[] streamHeaders = this.StreamHeaders;
for (int i = 0; i < numberOfStreams; ++i) {
if (memReader.RemainingBytes < COR20Constants.MinimumSizeofStreamHeader) {
this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset, MetadataReaderErrorKind.StreamHeaderTooSmall);
return false;
}
streamHeaders[i].Offset = memReader.ReadUInt32();
streamHeaders[i].Size = memReader.ReadInt32();
// Review: Oh well there is no way i can test if we will read correctly. However we can check it after reading and aligning...
streamHeaders[i].Name = memReader.ReadASCIINullTerminated();
memReader.Align(4);
if (memReader.RemainingBytes < 0) {
this.ErrorContainer.AddDirectoryError(Directories.Cor20HeaderMetaData, memReader.Offset, MetadataReaderErrorKind.NotEnoughSpaceForStreamHeaderName);
return false;
}
}
return true;
}