private void ReadMetadataTableHeader(ref BlobReader reader, out HeapSizes heapSizes, out int[] metadataTableRowCounts, out TableMask sortedTables)
{
if (reader.RemainingBytes < MetadataStreamConstants.SizeOfMetadataTableHeader)
{
throw new BadImageFormatException("MetadataTableHeaderTooSmall");
}
// reserved (shall be ignored):
reader.ReadUInt32();
// major version (shall be ignored):
reader.ReadByte();
// minor version (shall be ignored):
reader.ReadByte();
// heap sizes:
heapSizes = (HeapSizes)reader.ReadByte();
// reserved (shall be ignored):
reader.ReadByte();
ulong presentTables = reader.ReadUInt64();
sortedTables = (TableMask)reader.ReadUInt64();
// According to ECMA-335, MajorVersion and MinorVersion have fixed values and,
// based on recommendation in 24.1 Fixed fields: When writing these fields it
// is best that they be set to the value indicated, on reading they should be ignored.
// We will not be checking version values. We will continue checking that the set of
// present tables is within the set we understand.
ulong validTables = (ulong)(TableMask.TypeSystemTables | TableMask.DebugTables);
if ((presentTables & ~validTables) != 0)
{
throw new BadImageFormatException("UnknownTables");
}
if (_metadataStreamKind == MetadataStreamKind.Compressed)
{
// In general Ptr tables and EnC tables are not allowed in a compressed stream.
// However when asked for a snapshot of the current metadata after an EnC change has been applied
// the CLR includes the EnCLog table into the snapshot. We need to be able to read the image,
// so we'll allow the table here but pretend it's empty later.
if ((presentTables & (ulong)(TableMask.PtrTables | TableMask.EnCMap)) != 0)
{
throw new BadImageFormatException("IllegalTablesInCompressedMetadataStream");
}
}
metadataTableRowCounts = ReadMetadataTableRowCounts(ref reader, presentTables);
if ((heapSizes & HeapSizes.ExtraData) == HeapSizes.ExtraData)
{
// Skip "extra data" used by some obfuscators. Although it is not mentioned in the CLI spec,
// it is honored by the native metadata reader.
reader.ReadUInt32();
}
}
private static ImmutableArray <ExceptionRegion> ReadSmallExceptionHandlers(ref BlobReader memReader, int count)
{
var result = new ExceptionRegion[count];
for (int i = 0; i < result.Length; i++)
{
var kind = (ExceptionRegionKind)memReader.ReadUInt16();
var tryOffset = memReader.ReadUInt16();
var tryLength = memReader.ReadByte();
var handlerOffset = memReader.ReadUInt16();
var handlerLength = memReader.ReadByte();
var classTokenOrFilterOffset = memReader.ReadInt32();
result[i] = new ExceptionRegion(kind, tryOffset, tryLength, handlerOffset, handlerLength, classTokenOrFilterOffset);
}
return(ImmutableArray.Create(result));
}
public static ILResult GetInstructions(BlobReader reader)
{
var instructions = ImmutableArray.CreateBuilder<Instruction>();
List<int[]> switches = null;
while (reader.RemainingBytes > 0)
{
ushort pos = (ushort)reader.Offset;
byte op0 = reader.ReadByte();
InstrCode code = (InstrCode)(op0 == 0xFE ? unchecked(0xFE00 + reader.ReadByte()) : op0);
OperandType opType = code.GetOperandType();
ulong operand = 0;
if (code == InstrCode.Switch)
{
if (switches == null)
switches = new List<int[]>();
operand = (ulong)switches.Count;
uint branchCount = reader.ReadUInt32();
int[] branches = new int[branchCount];
for (int i = 0; i < branchCount; i++)
{
branches[i] = reader.ReadInt32();
}
switches.Add(branches);
}
else
{
byte operandSize = opType.GetOperandSize();
operand = operandSize == 8 ? reader.ReadUInt64()
: operandSize == 4 ? reader.ReadUInt32()
: operandSize == 2 ? reader.ReadUInt16()
: operandSize == 1 ? (ulong)reader.ReadByte()
: 0;
}
instructions.Add(new Instruction(pos, code, opType, operand));
}
return new ILResult
{
Instructions = instructions.ToImmutable(),
Switches = switches?.ToArray()
};
}
private unsafe static ImmutableArray<LocalSlotDebugInfo> UncompressSlotMap(ImmutableArray<byte> compressedSlotMap)
{
if (compressedSlotMap.IsDefaultOrEmpty)
{
return default(ImmutableArray<LocalSlotDebugInfo>);
}
var mapBuilder = ArrayBuilder<LocalSlotDebugInfo>.GetInstance();
int syntaxOffsetBaseline = -1;
fixed (byte* compressedSlotMapPtr = &compressedSlotMap.ToArray()[0])
{
var blobReader = new BlobReader(compressedSlotMapPtr, compressedSlotMap.Length);
while (blobReader.RemainingBytes > 0)
{
byte b = blobReader.ReadByte();
if (b == SyntaxOffsetBaseline)
{
syntaxOffsetBaseline = -blobReader.ReadCompressedInteger();
continue;
}
if (b == 0)
{
// short-lived temp, no info
mapBuilder.Add(new LocalSlotDebugInfo(SynthesizedLocalKind.LoweringTemp, default(LocalDebugId)));
continue;
}
var kind = (SynthesizedLocalKind)((b & 0x3f) - 1);
bool hasOrdinal = (b & (1 << 7)) != 0;
int syntaxOffset;
if (!blobReader.TryReadCompressedInteger(out syntaxOffset))
{
// invalid data
return default(ImmutableArray<LocalSlotDebugInfo>);
}
syntaxOffset += syntaxOffsetBaseline;
int ordinal = 0;
if (hasOrdinal && !blobReader.TryReadCompressedInteger(out ordinal))
{
// invalid data
return default(ImmutableArray<LocalSlotDebugInfo>);
}
mapBuilder.Add(new LocalSlotDebugInfo(kind, new LocalDebugId(syntaxOffset, ordinal)));
}
}
return mapBuilder.ToImmutableAndFree();
}
/// <summary>
/// We want to know if a given method implements a redirected interface.
/// For example, if we are given the method RemoveAt on a class "A"
/// which implements the IVector interface (which is redirected
/// to IList in .NET) then this method would return true. The most
/// likely reason why we would want to know this is that we wish to hide
/// (mark private) all methods which implement methods on a redirected
/// interface.
/// </summary>
/// <param name="memberRef">The declaration token for the method</param>
/// <param name="isIDisposable">
/// Returns true if the redirected interface is <see cref="IDisposable"/>.
/// </param>
/// <returns>True if the method implements a method on a redirected interface.
/// False otherwise.</returns>
private bool ImplementsRedirectedInterface(MemberReferenceHandle memberRef, out bool isIDisposable)
{
isIDisposable = false;
EntityHandle parent = MemberRefTable.GetClass(memberRef);
TypeReferenceHandle typeRef;
if (parent.Kind == HandleKind.TypeReference)
{
typeRef = (TypeReferenceHandle)parent;
}
else if (parent.Kind == HandleKind.TypeSpecification)
{
BlobHandle blob = TypeSpecTable.GetSignature((TypeSpecificationHandle)parent);
BlobReader sig = new BlobReader(BlobStream.GetMemoryBlock(blob));
if (sig.Length < 2 ||
sig.ReadByte() != (byte)CorElementType.ELEMENT_TYPE_GENERICINST ||
sig.ReadByte() != (byte)CorElementType.ELEMENT_TYPE_CLASS)
{
return(false);
}
EntityHandle token = sig.ReadTypeHandle();
if (token.Kind != HandleKind.TypeReference)
{
return(false);
}
typeRef = (TypeReferenceHandle)token;
}
else
{
return(false);
}
return(GetProjectionIndexForTypeReference(typeRef, out isIDisposable) >= 0);
}
public static MethodBodyBlock Create(BlobReader reader)
{
int startOffset = reader.Offset;
int ilSize;
// Error need to check if the Memory Block is empty. This is calse for all the calls...
byte headByte = reader.ReadByte();
if ((headByte & ILFormatMask) == ILTinyFormat)
{
// tiny IL can't have locals so technically this shouldn't matter,
// but false is consistent with other metadata readers and helps
// for use cases involving comparing our output with theirs.
const bool initLocalsForTinyIL = false;
ilSize = headByte >> ILTinyFormatSizeShift;
return new MethodBodyBlock(
initLocalsForTinyIL,
8,
default(StandaloneSignatureHandle),
reader.GetMemoryBlockAt(0, ilSize),
ImmutableArray<ExceptionRegion>.Empty,
1 + ilSize // header + IL
);
}
if ((headByte & ILFormatMask) != ILFatFormat)
{
throw new BadImageFormatException(string.Format(MetadataResources.InvalidMethodHeader1, headByte));
}
// FatILFormat
byte headByte2 = reader.ReadByte();
if ((headByte2 >> ILFatFormatHeaderSizeShift) != ILFatFormatHeaderSize)
{
throw new BadImageFormatException(string.Format(MetadataResources.InvalidMethodHeader2, headByte, headByte2));
}
bool localsInitialized = (headByte & ILInitLocals) == ILInitLocals;
bool hasExceptionHandlers = (headByte & ILMoreSects) == ILMoreSects;
ushort maxStack = reader.ReadUInt16();
ilSize = reader.ReadInt32();
int localSignatureToken = reader.ReadInt32();
StandaloneSignatureHandle localSignatureHandle;
if (localSignatureToken == 0)
{
localSignatureHandle = default(StandaloneSignatureHandle);
}
else if ((localSignatureToken & TokenTypeIds.TokenTypeMask) == TokenTypeIds.Signature)
{
localSignatureHandle = StandaloneSignatureHandle.FromRowId((uint)localSignatureToken & TokenTypeIds.RIDMask);
}
else
{
throw new BadImageFormatException(string.Format(MetadataResources.InvalidLocalSignatureToken, unchecked((uint)localSignatureToken)));
}
var ilBlock = reader.GetMemoryBlockAt(0, ilSize);
reader.SkipBytes(ilSize);
ImmutableArray<ExceptionRegion> exceptionHandlers;
if (hasExceptionHandlers)
{
reader.Align(4);
byte sehHeader = reader.ReadByte();
if ((sehHeader & SectEHTable) != SectEHTable)
{
throw new BadImageFormatException(string.Format(MetadataResources.InvalidSehHeader, sehHeader));
}
bool sehFatFormat = (sehHeader & SectFatFormat) == SectFatFormat;
int dataSize = reader.ReadByte();
if (sehFatFormat)
{
dataSize += reader.ReadUInt16() << 8;
exceptionHandlers = ReadFatExceptionHandlers(ref reader, dataSize / 24);
}
else
{
reader.SkipBytes(2); // skip over reserved field
exceptionHandlers = ReadSmallExceptionHandlers(ref reader, dataSize / 12);
}
}
else
{
exceptionHandlers = ImmutableArray<ExceptionRegion>.Empty;
}
return new MethodBodyBlock(
localsInitialized,
maxStack,
localSignatureHandle,
ilBlock,
exceptionHandlers,
reader.Offset - startOffset);
}
IAttribute ConvertMarshalInfo(SRM.BlobReader marshalInfo)
{
var b = new AttributeBuilder(module, KnownAttribute.MarshalAs);
IType unmanagedTypeType = module.Compilation.FindType(new TopLevelTypeName(InteropServices, nameof(UnmanagedType)));
int type = marshalInfo.ReadByte();
b.AddFixedArg(unmanagedTypeType, type);
int size;
switch (type)
{
case 0x1e: // FixedArray
if (!marshalInfo.TryReadCompressedInteger(out size))
{
size = 0;
}
b.AddNamedArg("SizeConst", KnownTypeCode.Int32, size);
if (marshalInfo.RemainingBytes > 0)
{
type = marshalInfo.ReadByte();
if (type != 0x66) // None
{
b.AddNamedArg("ArraySubType", unmanagedTypeType, type);
}
}
break;
case 0x1d: // SafeArray
if (marshalInfo.RemainingBytes > 0)
{
VarEnum varType = (VarEnum)marshalInfo.ReadByte();
if (varType != VarEnum.VT_EMPTY)
{
var varEnumType = new TopLevelTypeName(InteropServices, nameof(VarEnum));
b.AddNamedArg("SafeArraySubType", varEnumType, (int)varType);
}
}
break;
case 0x2a: // NATIVE_TYPE_ARRAY
if (marshalInfo.RemainingBytes > 0)
{
type = marshalInfo.ReadByte();
}
else
{
type = 0x66; // Cecil uses NativeType.None as default.
}
if (type != 0x50) // Max
{
b.AddNamedArg("ArraySubType", unmanagedTypeType, type);
}
int sizeParameterIndex = marshalInfo.TryReadCompressedInteger(out int value) ? value : -1;
size = marshalInfo.TryReadCompressedInteger(out value) ? value : -1;
int sizeParameterMultiplier = marshalInfo.TryReadCompressedInteger(out value) ? value : -1;
if (size >= 0)
{
b.AddNamedArg("SizeConst", KnownTypeCode.Int32, size);
}
if (sizeParameterMultiplier != 0 && sizeParameterIndex >= 0)
{
b.AddNamedArg("SizeParamIndex", KnownTypeCode.Int16, (short)sizeParameterIndex);
}
break;
case 0x2c: // CustomMarshaler
string guidValue = marshalInfo.ReadSerializedString();
string unmanagedType = marshalInfo.ReadSerializedString();
string managedType = marshalInfo.ReadSerializedString();
string cookie = marshalInfo.ReadSerializedString();
if (managedType != null)
{
b.AddNamedArg("MarshalType", KnownTypeCode.String, managedType);
}
if (!string.IsNullOrEmpty(cookie))
{
b.AddNamedArg("MarshalCookie", KnownTypeCode.String, cookie);
}
break;
case 0x17: // FixedSysString
b.AddNamedArg("SizeConst", KnownTypeCode.Int32, marshalInfo.ReadCompressedInteger());
break;
}
return(b.Build());
}
private void ReadMetadataTableHeader(ref BlobReader memReader, out uint[] metadataTableRowCounts)
{
if (memReader.RemainingBytes < MetadataStreamConstants.SizeOfMetadataTableHeader)
{
throw new BadImageFormatException(MetadataResources.MetadataTableHeaderTooSmall);
}
this.MetadataTableHeader.Reserved = memReader.ReadUInt32();
this.MetadataTableHeader.MajorVersion = memReader.ReadByte();
this.MetadataTableHeader.MinorVersion = memReader.ReadByte();
this.MetadataTableHeader.HeapSizeFlags = (HeapSizeFlag)memReader.ReadByte();
this.MetadataTableHeader.RowId = memReader.ReadByte();
this.MetadataTableHeader.ValidTables = (TableMask)memReader.ReadUInt64();
this.MetadataTableHeader.SortedTables = (TableMask)memReader.ReadUInt64();
ulong presentTables = (ulong)this.MetadataTableHeader.ValidTables;
// According to ECMA-335, MajorVersion and MinorVersion have fixed values and,
// based on recommendation in 24.1 Fixed fields: When writing these fields it
// is best that they be set to the value indicated, on reading they should be ignored.?
// we will not be checking version values. We will continue checking that the set of
// present tables is within the set we understand.
ulong validTables = (ulong)TableMask.V2_0_TablesMask;
if ((presentTables & ~validTables) != 0)
{
throw new BadImageFormatException(string.Format(MetadataResources.UnknownTables, presentTables));
}
if (this.metadataStreamKind == MetadataStreamKind.Compressed)
{
// In general Ptr tables and EnC tables are not allowed in a compressed stream.
// However when asked for a snapshot of the current metadata after an EnC change has been applied
// the CLR includes the EnCLog table into the snapshot. We need to be able to read the image,
// so we'll allow the table here but pretend it's empty later.
if ((presentTables & (ulong)(TableMask.PtrTables | TableMask.EnCMap)) != 0)
{
throw new BadImageFormatException(MetadataResources.IllegalTablesInCompressedMetadataStream);
}
}
int numberOfTables = this.MetadataTableHeader.GetNumberOfTablesPresent();
if (memReader.RemainingBytes < numberOfTables * sizeof(int))
{
throw new BadImageFormatException(MetadataResources.TableRowCountSpaceTooSmall);
}
var rowCounts = new uint[numberOfTables];
for (int i = 0; i < rowCounts.Length; i++)
{
rowCounts[i] = memReader.ReadUInt32();
}
metadataTableRowCounts = rowCounts;
}
/// <summary>
/// Reads the data pointed to by the specified Debug Directory entry and interprets them as CodeView.
/// </summary>
/// <exception cref="ArgumentException"><paramref name="entry"/> is not a CodeView entry.</exception>
/// <exception cref="BadImageFormatException">Bad format of the data.</exception>
/// <exception cref="IOException">IO error while reading from the underlying stream.</exception>
public unsafe CodeViewDebugDirectoryData ReadCodeViewDebugDirectoryData(DebugDirectoryEntry entry)
{
if (entry.Type != DebugDirectoryEntryType.CodeView)
{
throw new ArgumentException(SR.NotCodeViewEntry, nameof(entry));
}
using (AbstractMemoryBlock block = _peImage.GetMemoryBlock(entry.DataPointer, entry.DataSize))
{
var reader = new BlobReader(block.Pointer, block.Size);
if (reader.ReadByte() != (byte)'R' ||
reader.ReadByte() != (byte)'S' ||
reader.ReadByte() != (byte)'D' ||
reader.ReadByte() != (byte)'S')
{
throw new BadImageFormatException(SR.UnexpectedCodeViewDataSignature);
}
Guid guid = reader.ReadGuid();
int age = reader.ReadInt32();
string path = reader.ReadUtf8NullTerminated();
// path may be padded with NULs
while (reader.RemainingBytes > 0)
{
if (reader.ReadByte() != 0)
{
throw new BadImageFormatException(SR.InvalidPathPadding);
}
}
return new CodeViewDebugDirectoryData(guid, age, path);
}
}
private void ReadMetadataTableHeader(ref BlobReader reader, out HeapSizes heapSizes, out int[] metadataTableRowCounts, out TableMask sortedTables)
{
if (reader.RemainingBytes < MetadataStreamConstants.SizeOfMetadataTableHeader)
{
throw new BadImageFormatException(SR.MetadataTableHeaderTooSmall);
}
// reserved (shall be ignored):
reader.ReadUInt32();
// major version (shall be ignored):
reader.ReadByte();
// minor version (shall be ignored):
reader.ReadByte();
// heap sizes:
heapSizes = (HeapSizes)reader.ReadByte();
// reserved (shall be ignored):
reader.ReadByte();
ulong presentTables = reader.ReadUInt64();
sortedTables = (TableMask)reader.ReadUInt64();
// According to ECMA-335, MajorVersion and MinorVersion have fixed values and,
// based on recommendation in 24.1 Fixed fields: When writing these fields it
// is best that they be set to the value indicated, on reading they should be ignored.
// We will not be checking version values. We will continue checking that the set of
// present tables is within the set we understand.
ulong validTables = (ulong)(TableMask.TypeSystemTables | TableMask.DebugTables);
if ((presentTables & ~validTables) != 0)
{
throw new BadImageFormatException(SR.Format(SR.UnknownTables, presentTables));
}
if (_metadataStreamKind == MetadataStreamKind.Compressed)
{
// In general Ptr tables and EnC tables are not allowed in a compressed stream.
// However when asked for a snapshot of the current metadata after an EnC change has been applied
// the CLR includes the EnCLog table into the snapshot. We need to be able to read the image,
// so we'll allow the table here but pretend it's empty later.
if ((presentTables & (ulong)(TableMask.PtrTables | TableMask.EnCMap)) != 0)
{
throw new BadImageFormatException(SR.IllegalTablesInCompressedMetadataStream);
}
}
metadataTableRowCounts = ReadMetadataTableRowCounts(ref reader, presentTables);
if ((heapSizes & HeapSizes.ExtraData) == HeapSizes.ExtraData)
{
// Skip "extra data" used by some obfuscators. Although it is not mentioned in the CLI spec,
// it is honored by the native metadata reader.
reader.ReadUInt32();
}
}
/// <exception cref="InvalidDataException">Invalid data.</exception>
private unsafe static ImmutableArray<LocalSlotDebugInfo> UncompressSlotMap(ImmutableArray<byte> compressedSlotMap)
{
if (compressedSlotMap.IsDefaultOrEmpty)
{
return default(ImmutableArray<LocalSlotDebugInfo>);
}
var mapBuilder = ArrayBuilder<LocalSlotDebugInfo>.GetInstance();
int syntaxOffsetBaseline = -1;
fixed (byte* compressedSlotMapPtr = &compressedSlotMap.ToArray()[0])
{
var blobReader = new BlobReader(compressedSlotMapPtr, compressedSlotMap.Length);
while (blobReader.RemainingBytes > 0)
{
try
{
// Note: integer operations below can't overflow since compressed integers are in range [0, 0x20000000)
byte b = blobReader.ReadByte();
if (b == SyntaxOffsetBaseline)
{
syntaxOffsetBaseline = -blobReader.ReadCompressedInteger();
continue;
}
if (b == 0)
{
// short-lived temp, no info
mapBuilder.Add(new LocalSlotDebugInfo(SynthesizedLocalKind.LoweringTemp, default(LocalDebugId)));
continue;
}
var kind = (SynthesizedLocalKind)((b & 0x3f) - 1);
bool hasOrdinal = (b & (1 << 7)) != 0;
int syntaxOffset = blobReader.ReadCompressedInteger() + syntaxOffsetBaseline;
int ordinal = hasOrdinal ? blobReader.ReadCompressedInteger() : 0;
mapBuilder.Add(new LocalSlotDebugInfo(kind, new LocalDebugId(syntaxOffset, ordinal)));
}
catch (BadImageFormatException)
{
throw CreateInvalidDataException(compressedSlotMap, blobReader.Offset);
}
}
}
return mapBuilder.ToImmutableAndFree();
}
public static MethodBodyBlock Create(BlobReader reader)
{
int startOffset = reader.Offset;
int ilSize;
// Error need to check if the Memory Block is empty. This is false for all the calls...
byte headByte = reader.ReadByte();
if ((headByte & ILFormatMask) == ILTinyFormat)
{
// tiny IL can't have locals so technically this shouldn't matter,
// but false is consistent with other metadata readers and helps
// for use cases involving comparing our output with theirs.
const bool initLocalsForTinyIL = false;
ilSize = headByte >> ILTinyFormatSizeShift;
return(new MethodBodyBlock(
initLocalsForTinyIL,
8,
default(StandaloneSignatureHandle),
reader.GetMemoryBlockAt(0, ilSize),
ImmutableArray <ExceptionRegion> .Empty,
1 + ilSize // header + IL
));
}
if ((headByte & ILFormatMask) != ILFatFormat)
{
throw new BadImageFormatException(SR.Format(SR.InvalidMethodHeader1, headByte));
}
// FatILFormat
byte headByte2 = reader.ReadByte();
if ((headByte2 >> ILFatFormatHeaderSizeShift) != ILFatFormatHeaderSize)
{
throw new BadImageFormatException(SR.Format(SR.InvalidMethodHeader2, headByte, headByte2));
}
bool localsInitialized = (headByte & ILInitLocals) == ILInitLocals;
bool hasExceptionHandlers = (headByte & ILMoreSects) == ILMoreSects;
ushort maxStack = reader.ReadUInt16();
ilSize = reader.ReadInt32();
int localSignatureToken = reader.ReadInt32();
StandaloneSignatureHandle localSignatureHandle;
if (localSignatureToken == 0)
{
localSignatureHandle = default(StandaloneSignatureHandle);
}
else if ((localSignatureToken & TokenTypeIds.TypeMask) == TokenTypeIds.Signature)
{
localSignatureHandle = StandaloneSignatureHandle.FromRowId((int)((uint)localSignatureToken & TokenTypeIds.RIDMask));
}
else
{
throw new BadImageFormatException(SR.Format(SR.InvalidLocalSignatureToken, unchecked ((uint)localSignatureToken)));
}
var ilBlock = reader.GetMemoryBlockAt(0, ilSize);
reader.Offset += ilSize;
ImmutableArray <ExceptionRegion> exceptionHandlers;
if (hasExceptionHandlers)
{
reader.Align(4);
byte sehHeader = reader.ReadByte();
if ((sehHeader & SectEHTable) != SectEHTable)
{
throw new BadImageFormatException(SR.Format(SR.InvalidSehHeader, sehHeader));
}
bool sehFatFormat = (sehHeader & SectFatFormat) == SectFatFormat;
int dataSize = reader.ReadByte();
if (sehFatFormat)
{
dataSize += reader.ReadUInt16() << 8;
exceptionHandlers = ReadFatExceptionHandlers(ref reader, dataSize / 24);
}
else
{
reader.Offset += 2; // skip over reserved field
exceptionHandlers = ReadSmallExceptionHandlers(ref reader, dataSize / 12);
}
}
else
{
exceptionHandlers = ImmutableArray <ExceptionRegion> .Empty;
}
return(new MethodBodyBlock(
localsInitialized,
maxStack,
localSignatureHandle,
ilBlock,
exceptionHandlers,
reader.Offset - startOffset));
}
private static ImmutableArray<ExceptionRegion> ReadSmallExceptionHandlers(ref BlobReader memReader, int count)
{
var result = new ExceptionRegion[count];
for (int i = 0; i < result.Length; i++)
{
var kind = (ExceptionRegionKind)memReader.ReadUInt16();
var tryOffset = memReader.ReadUInt16();
var tryLength = memReader.ReadByte();
var handlerOffset = memReader.ReadUInt16();
var handlerLength = memReader.ReadByte();
var classTokenOrFilterOffset = memReader.ReadInt32();
result[i] = new ExceptionRegion(kind, tryOffset, tryLength, handlerOffset, handlerLength, classTokenOrFilterOffset);
}
return ImmutableArray.Create(result);
}
public DynamicAnalysisDataReader(byte* buffer, int size)
{
var reader = new BlobReader(buffer, size);
// header:
if (reader.ReadByte() != 'D' || reader.ReadByte() != 'A' || reader.ReadByte() != 'M' || reader.ReadByte() != 'D')
{
throw new BadImageFormatException();
}
// version
byte major = reader.ReadByte();
byte minor = reader.ReadByte();
if (major != 0 || minor < 1 || minor > 2)
{
throw new NotSupportedException();
}
// table sizes:
int documentRowCount = reader.ReadInt32();
int methodSpanRowCount = reader.ReadInt32();
// blob heap sizes:
int stringHeapSize = (minor == 1) ? reader.ReadInt32() : 0;
int userStringHeapSize = (minor == 1) ? reader.ReadInt32() : 0;
int guidHeapSize = reader.ReadInt32();
int blobHeapSize = reader.ReadInt32();
// TODO: check size ranges
bool isBlobHeapSmall = blobHeapSize <= ushort.MaxValue;
bool isGuidHeapSmall = guidHeapSize / GuidSize <= ushort.MaxValue;
var documentsBuilder = ArrayBuilder<DynamicAnalysisDocument>.GetInstance(documentRowCount);
for (int i = 0; i < documentRowCount; i++)
{
var name = MetadataTokens.BlobHandle(ReadReference(ref reader, isBlobHeapSmall));
var hashAlgorithm = MetadataTokens.GuidHandle(ReadReference(ref reader, isGuidHeapSmall));
var hash = MetadataTokens.BlobHandle(ReadReference(ref reader, isBlobHeapSmall));
documentsBuilder.Add(new DynamicAnalysisDocument(name, hashAlgorithm, hash));
}
Documents = documentsBuilder.ToImmutableAndFree();
var methodsBuilder = ArrayBuilder<DynamicAnalysisMethod>.GetInstance(methodSpanRowCount);
for (int i = 0; i < methodSpanRowCount; i++)
{
methodsBuilder.Add(new DynamicAnalysisMethod(MetadataTokens.BlobHandle(ReadReference(ref reader, isBlobHeapSmall))));
}
Methods = methodsBuilder.ToImmutableAndFree();
int stringHeapOffset = reader.Offset;
int userStringHeapOffset = stringHeapOffset + stringHeapSize;
int guidHeapOffset = userStringHeapOffset + userStringHeapSize;
int blobHeapOffset = guidHeapOffset + guidHeapSize;
if (reader.Length != blobHeapOffset + blobHeapSize)
{
throw new BadImageFormatException();
}
_guidHeapBlob = new Blob(buffer + guidHeapOffset, guidHeapSize);
_blobHeapBlob = new Blob(buffer + blobHeapOffset, blobHeapSize);
}
private MetadataRecord HandleConstant(Cts.Ecma.EcmaModule module, Ecma.ConstantHandle constantHandle)
{
Ecma.MetadataReader reader = module.MetadataReader;
Ecma.Constant constant = reader.GetConstant(constantHandle);
Ecma.BlobReader blob = reader.GetBlobReader(constant.Value);
switch (constant.TypeCode)
{
case ConstantTypeCode.Boolean:
return(new ConstantBooleanValue {
Value = blob.ReadBoolean()
});
case ConstantTypeCode.Byte:
return(new ConstantByteValue {
Value = blob.ReadByte()
});
case ConstantTypeCode.Char:
return(new ConstantCharValue {
Value = blob.ReadChar()
});
case ConstantTypeCode.Double:
return(new ConstantDoubleValue {
Value = blob.ReadDouble()
});
case ConstantTypeCode.Int16:
return(new ConstantInt16Value {
Value = blob.ReadInt16()
});
case ConstantTypeCode.Int32:
return(new ConstantInt32Value {
Value = blob.ReadInt32()
});
case ConstantTypeCode.Int64:
return(new ConstantInt64Value {
Value = blob.ReadInt64()
});
case ConstantTypeCode.SByte:
return(new ConstantSByteValue {
Value = blob.ReadSByte()
});
case ConstantTypeCode.Single:
return(new ConstantSingleValue {
Value = blob.ReadSingle()
});
case ConstantTypeCode.String:
return(HandleString(blob.ReadUTF16(blob.Length)));
case ConstantTypeCode.UInt16:
return(new ConstantUInt16Value {
Value = blob.ReadUInt16()
});
case ConstantTypeCode.UInt32:
return(new ConstantUInt32Value {
Value = blob.ReadUInt32()
});
case ConstantTypeCode.UInt64:
return(new ConstantUInt64Value {
Value = blob.ReadUInt64()
});
case ConstantTypeCode.NullReference:
return(new ConstantReferenceValue());
default:
throw new BadImageFormatException();
}
}
/// <summary>
/// We want to know if a given method implements a redirected interface.
/// For example, if we are given the method RemoveAt on a class "A"
/// which implements the IVector interface (which is redirected
/// to IList in .NET) then this method would return true. The most
/// likely reason why we would want to know this is that we wish to hide
/// (mark private) all methods which implement methods on a redirected
/// interface.
/// </summary>
/// <param name="memberRef">The declaration token for the method</param>
/// <param name="isIDisposable">
/// Returns true if the redirected interface is <see cref="IDisposable"/>.
/// </param>
/// <returns>True if the method implements a method on a redirected interface.
/// False otherwise.</returns>
private bool ImplementsRedirectedInterface(MemberReferenceHandle memberRef, out bool isIDisposable)
{
isIDisposable = false;
EntityHandle parent = MemberRefTable.GetClass(memberRef);
TypeReferenceHandle typeRef;
if (parent.Kind == HandleKind.TypeReference)
{
typeRef = (TypeReferenceHandle)parent;
}
else if (parent.Kind == HandleKind.TypeSpecification)
{
BlobHandle blob = TypeSpecTable.GetSignature((TypeSpecificationHandle)parent);
BlobReader sig = new BlobReader(BlobHeap.GetMemoryBlock(blob));
if (sig.Length < 2 ||
sig.ReadByte() != (byte)CorElementType.ELEMENT_TYPE_GENERICINST ||
sig.ReadByte() != (byte)CorElementType.ELEMENT_TYPE_CLASS)
{
return false;
}
EntityHandle token = sig.ReadTypeHandle();
if (token.Kind != HandleKind.TypeReference)
{
return false;
}
typeRef = (TypeReferenceHandle)token;
}
else
{
return false;
}
return GetProjectionIndexForTypeReference(typeRef, out isIDisposable) >= 0;
}
private unsafe void WriteEditAndContinueLocalSlotMap(CustomDebugInfoRecord record)
{
Debug.Assert(record.Kind == CustomDebugInfoKind.EditAndContinueLocalSlotMap);
_writer.WriteStartElement("encLocalSlotMap");
try
{
int syntaxOffsetBaseline = -1;
fixed (byte* compressedSlotMapPtr = &record.Data.ToArray()[0])
{
var blobReader = new BlobReader(compressedSlotMapPtr, record.Data.Length);
while (blobReader.RemainingBytes > 0)
{
byte b = blobReader.ReadByte();
if (b == 0xff)
{
if (!blobReader.TryReadCompressedInteger(out syntaxOffsetBaseline))
{
_writer.WriteElementString("baseline", "?");
return;
}
syntaxOffsetBaseline = -syntaxOffsetBaseline;
continue;
}
_writer.WriteStartElement("slot");
if (b == 0)
{
// short-lived temp, no info
_writer.WriteAttributeString("kind", "temp");
}
else
{
int synthesizedKind = (b & 0x3f) - 1;
bool hasOrdinal = (b & (1 << 7)) != 0;
int syntaxOffset;
bool badSyntaxOffset = !blobReader.TryReadCompressedInteger(out syntaxOffset);
syntaxOffset += syntaxOffsetBaseline;
int ordinal = 0;
bool badOrdinal = hasOrdinal && !blobReader.TryReadCompressedInteger(out ordinal);
_writer.WriteAttributeString("kind", CultureInvariantToString(synthesizedKind));
_writer.WriteAttributeString("offset", badSyntaxOffset ? "?" : CultureInvariantToString(syntaxOffset));
if (badOrdinal || hasOrdinal)
{
_writer.WriteAttributeString("ordinal", badOrdinal ? "?" : CultureInvariantToString(ordinal));
}
}
_writer.WriteEndElement();
}
}
}
finally
{
_writer.WriteEndElement(); //encLocalSlotMap
}
}
/// <exception cref="BadImageFormatException">Invalid blob format.</exception>
public bool MoveNext()
{
if (_reader.RemainingBytes == 0)
{
return(false);
}
var kind = (ImportDefinitionKind)_reader.ReadByte();
switch (kind)
{
case ImportDefinitionKind.ImportType:
_current = new ImportDefinition(
kind,
typeOrNamespace: _reader.ReadTypeHandle());
break;
case ImportDefinitionKind.ImportNamespace:
_current = new ImportDefinition(
kind,
typeOrNamespace: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()));
break;
case ImportDefinitionKind.ImportAssemblyNamespace:
_current = new ImportDefinition(
kind,
assembly: MetadataTokens.AssemblyReferenceHandle(_reader.ReadCompressedInteger()),
typeOrNamespace: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()));
break;
case ImportDefinitionKind.ImportAssemblyReferenceAlias:
_current = new ImportDefinition(
kind,
alias: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()));
break;
case ImportDefinitionKind.AliasAssemblyReference:
_current = new ImportDefinition(
kind,
alias: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()),
assembly: MetadataTokens.AssemblyReferenceHandle(_reader.ReadCompressedInteger()));
break;
case ImportDefinitionKind.AliasType:
_current = new ImportDefinition(
kind,
alias: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()),
typeOrNamespace: _reader.ReadTypeHandle());
break;
case ImportDefinitionKind.ImportXmlNamespace:
case ImportDefinitionKind.AliasNamespace:
_current = new ImportDefinition(
kind,
alias: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()),
typeOrNamespace: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()));
break;
case ImportDefinitionKind.AliasAssemblyNamespace:
_current = new ImportDefinition(
kind,
alias: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()),
assembly: MetadataTokens.AssemblyReferenceHandle(_reader.ReadCompressedInteger()),
typeOrNamespace: MetadataTokens.BlobHandle(_reader.ReadCompressedInteger()));
break;
default:
throw new BadImageFormatException(SR.Format(SR.InvalidImportDefinitionKind, kind));
}
return(true);
}
private object ReadAndTranslateValue(ref BlobReader sigReader, SignatureTypeCode typeCode, out bool isEnumTypeCode)
{
switch (typeCode)
{
case SignatureTypeCode.Boolean:
isEnumTypeCode = true;
return (short)(sigReader.ReadBoolean() ? 1 : 0);
case SignatureTypeCode.Char:
isEnumTypeCode = true;
return (ushort)sigReader.ReadChar();
case SignatureTypeCode.SByte:
isEnumTypeCode = true;
return (short)sigReader.ReadSByte();
case SignatureTypeCode.Byte:
isEnumTypeCode = true;
return (short)sigReader.ReadByte();
case SignatureTypeCode.Int16:
isEnumTypeCode = true;
return sigReader.ReadInt16();
case SignatureTypeCode.UInt16:
isEnumTypeCode = true;
return sigReader.ReadUInt16();
case SignatureTypeCode.Int32:
isEnumTypeCode = true;
return sigReader.ReadInt32();
case SignatureTypeCode.UInt32:
isEnumTypeCode = true;
return sigReader.ReadUInt32();
case SignatureTypeCode.Int64:
isEnumTypeCode = true;
return sigReader.ReadInt64();
case SignatureTypeCode.UInt64:
isEnumTypeCode = true;
return sigReader.ReadUInt64();
case SignatureTypeCode.Single:
isEnumTypeCode = false;
return sigReader.ReadSingle();
case SignatureTypeCode.Double:
isEnumTypeCode = false;
return sigReader.ReadDouble();
case SignatureTypeCode.String:
isEnumTypeCode = false;
if (sigReader.RemainingBytes == 1)
{
if (sigReader.ReadByte() != 0xff)
{
throw new BadImageFormatException();
}
return NullReferenceValue;
}
if (sigReader.RemainingBytes % 2 != 0)
{
throw new BadImageFormatException();
}
return sigReader.ReadUTF16(sigReader.RemainingBytes);
case SignatureTypeCode.Object:
// null reference
isEnumTypeCode = false;
return NullReferenceValue;
default:
throw new BadImageFormatException();
}
}
