public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
// This node does not trigger generation of other nodes.
if (relocsOnly)
{
return(new ObjectData(Array.Empty <byte>(), Array.Empty <Relocation>(), 1, new ISymbolDefinitionNode[] { this }));
}
MemoryStream memoryStream = new MemoryStream(1000000);
_pseudoAssembly.EmitToStream(memoryStream);
_pseudoAssembly = null;
return(new ObjectData(memoryStream.ToArray(), Array.Empty <Relocation>(), 1, new ISymbolDefinitionNode[] { this }));
}
public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
// This node does not trigger generation of other nodes.
if (relocsOnly)
{
return(new ObjectData(Array.Empty <byte>(), Array.Empty <Relocation>(), 1, new ISymbolDefinitionNode[] { this }));
}
ObjectDataBuilder objDataBuilder = new ObjectDataBuilder(factory, relocsOnly);
// Emit number of dictionaries in table
objDataBuilder.AddSymbol(this);
IReadOnlyCollection <GenericDictionaryNode> dictionariesEmitted = factory.MetadataManager.GetCompiledGenericDictionaries();
objDataBuilder.EmitInt(dictionariesEmitted.Count);
DebugInfoBlob signatureData = new DebugInfoBlob();
BlobBuilder signatureBlobBuilder = new BlobBuilder();
BlobBuilder signatureLenBuilder = new BlobBuilder();
ManagedBinaryEmitter pseudoAssembly = factory.WindowsDebugData.DebugPseudoAssemblySection.PseudoAssembly;
foreach (GenericDictionaryNode dictionary in dictionariesEmitted)
{
objDataBuilder.EmitReloc(dictionary, RelocType.IMAGE_REL_BASED_ADDR32NB);
objDataBuilder.EmitUInt(signatureData.Size());
signatureBlobBuilder.Clear();
int typeDictLen = dictionary.TypeInstantiation.IsNull ? 0 : dictionary.TypeInstantiation.Length;
int methodDictLen = dictionary.MethodInstantiation.IsNull ? 0 : dictionary.MethodInstantiation.Length;
signatureBlobBuilder.WriteCompressedInteger(typeDictLen + methodDictLen);
if (typeDictLen != 0)
{
foreach (TypeDesc type in dictionary.TypeInstantiation)
{
pseudoAssembly.EncodeSignatureForType(type, signatureBlobBuilder);
}
}
if (methodDictLen != 0)
{
foreach (TypeDesc type in dictionary.MethodInstantiation)
{
pseudoAssembly.EncodeSignatureForType(type, signatureBlobBuilder);
}
}
int blobSize = signatureBlobBuilder.Count;
signatureLenBuilder.Clear();
signatureLenBuilder.WriteCompressedInteger(blobSize);
// Prepend the signature data with a length
signatureData.WriteBuffer(signatureLenBuilder);
// And then attach the actual signature data
signatureData.WriteBuffer(signatureBlobBuilder);
}
// Attach signature information to end after all of the rva/offset pairs
objDataBuilder.EmitBytes(signatureData.ToArray());
return(objDataBuilder.ToObjectData());
}
//
// returns the DEBUG_S_FUNC_MDTOKEN_MAP subsection as a byte array
// DEBUG_S_FUNC_MDTOKEN_MAP subsection contains method RVA to mdToken mapping
//
// contents of subsection:
// offset 0, 4 bytes: count of entries in the map
// offset 4, 8*N bytes: 4 byte RVA + 4 byte 'offset' relative to the start of 'method data'
// offset 4+8*N, * bytes: all method data packed sequentially with no padding. method data consists of
// 1 byte 'count' of generic parameters, 3 bytes of method's rid and 'count'
// variable sized ECMA formatted TypeSpec signatures for each generic parameter
//
// Compiler places the CTLToken (for a method) or the lexical funclet order (if a method has 1 or more funclets),
// which binder uses to compute the RVA.
//
// all entries are sorted by 'offset' field.
//
// 'offset' optimization: if the method has no generic parameters, we don't need to pass in a signature
// and can encode the mdToken of method in 'offset'
// We do this by setting the high bit of 'offset' and then storing rid part of
// token in last 3 bytes of 'offset'
//
internal DebugInfoBlob GetDebugMethodRVAToTokenMap(ManagedBinaryEmitter pseudoAssembly, IEnumerable <IMethodBodyNode> emittedMethods, out List <Relocation> debugRelocations)
{
DebugInfoBlob methodRVAToTokenMap = new DebugInfoBlob();
DebugInfoBlob methodDataBlob = new DebugInfoBlob();
debugRelocations = new List <Relocation>();
BlobBuilder blobBuilder = new BlobBuilder();
uint entryCount = 0;
methodRVAToTokenMap.WriteDWORD(0); // Placeholder for count of entries in map. Will be udpated later.
List <EmittedMethodWithILToken> tokenInOffsetEntries = new List <EmittedMethodWithILToken>();
foreach (IMethodBodyNode emitted in emittedMethods)
{
if (!(emitted.Method.GetTypicalMethodDefinition() is Internal.TypeSystem.Ecma.EcmaMethod))
{
continue;
}
EntityHandle methodHandle = pseudoAssembly.EmitMetadataHandleForTypeSystemEntity(emitted.Method.GetTypicalMethodDefinition());
Debug.Assert(methodHandle.Kind == HandleKind.MemberReference);
uint methodToken = (uint)MetadataTokens.GetToken(methodHandle);
uint methodTokenRid = methodToken & 0xFFFFFF;
if (!(emitted.Method.HasInstantiation || emitted.Method.OwningType.HasInstantiation))
{
tokenInOffsetEntries.Add(new EmittedMethodWithILToken(emitted, methodTokenRid));
continue;
}
uint cGenericArguments = checked ((uint)emitted.Method.Instantiation.Length + (uint)emitted.Method.OwningType.Instantiation.Length);
// Debugger format does not allow the debugging of methods that have more than 255 generic parameters (spread between the type and method instantiation)
if (cGenericArguments > 0xFF)
{
continue;
}
blobBuilder.Clear();
// write the signature for each generic parameter of class
foreach (TypeDesc instantiationType in emitted.Method.OwningType.Instantiation)
{
pseudoAssembly.EncodeSignatureForType(instantiationType, blobBuilder);
}
// write the signature for each generic parameter of the method
foreach (TypeDesc instantiationType in emitted.Method.Instantiation)
{
pseudoAssembly.EncodeSignatureForType(instantiationType, blobBuilder);
}
Add_DEBUG_S_FUNC_MDTOKEN_MAP_Entry(methodRVAToTokenMap, debugRelocations, emitted, methodDataBlob.Size(), ref entryCount);
methodDataBlob.WriteDWORD(cGenericArguments << 24 | methodTokenRid);
methodDataBlob.WriteBuffer(blobBuilder);
}
// sort tokenInOffsetEntries based on tokenInOffset
tokenInOffsetEntries.Sort();
foreach (EmittedMethodWithILToken emitted in tokenInOffsetEntries)
{
Add_DEBUG_S_FUNC_MDTOKEN_MAP_Entry(methodRVAToTokenMap, debugRelocations, emitted.EmittedMethod, emitted.IlTokenRid | 0x80000000, ref entryCount);
}
methodRVAToTokenMap.SetDWORDAtBlobIndex(0, entryCount); // // Update placeholder for count of entries in map
methodRVAToTokenMap.WriteBuffer(methodDataBlob);
return(methodRVAToTokenMap);
}
// returns the DEBUG_S_TYPE_MDTOKEN_MAP subsection as a byte array
// DEBUG_S_TYPE_MDTOKEN_MAP subsection contains type-index to mdToken mapping
//
// contents of subsection:
// offset 0, 4 bytes: count of entries in the map
// offset 4, 8*N bytes: 4 byte type-index + 4 byte 'offset' relative to the start of 'type data'
// offset 4+8*N, * bytes: ECMA formatted type signature packed sequentially with no padding
//
// 'offset' optimization: for type signatures with size<= 4-bytes
// we can store the signature in offset field such that
// offset = (1 << 31) | (sig[0] << 24 | sig[1] << 16 | sig[2] << 8 | sig[3])
// We chose this bit encoding because sig[0] holds the CorElementType whose
// highest bit is always 0 and the highest bit of offset can be used as a flag
// to indicate that it is not an offset but the signature itself.
//
// all entries are sorted by 'offset' field and so offset-based entries are arranged before other
// (raw-signature) entries (since raw-signature entries are of the form 0x80000000 | signature, and will always be
// numerically bigger than the offset)
//
private DebugInfoBlob GetDebugTypeIndexToTokenMap(ManagedBinaryEmitter pseudoAssembly, ICollection <KeyValuePair <TypeDesc, uint> > completeKnownTypes)
{
DebugInfoBlob typeDataBlob = new DebugInfoBlob();
DebugInfoBlob typeIndexToTokenMapBlob = new DebugInfoBlob();
List <KeyValuePair <uint, uint> > sigInOffsetEntries = new List <KeyValuePair <uint, uint> >();
typeIndexToTokenMapBlob.WriteDWORD(checked ((uint)completeKnownTypes.Count));
BlobBuilder blobBuilder = new BlobBuilder();
foreach (var entry in completeKnownTypes)
{
uint typeIndex = entry.Value;
blobBuilder.Clear();
pseudoAssembly.EncodeSignatureForType(entry.Key, blobBuilder);
// if signature fits in 4-bytes, store it in sigInOffsetEntries
// otherwise store it in the type-data blob
if (blobBuilder.Count <= 4)
{
uint sigInOffset = 0x80000000;
int i = 0;
// This is a slightly confusing approach, but this is how one iterates through the bytes in a blobBuilder without flattening it to a byte[]
foreach (Blob blob in blobBuilder.GetBlobs())
{
foreach (byte b in blob.GetBytes())
{
sigInOffset |= ((uint)b) << (8 * (3 - i));
i++;
}
}
// sigInOffsetEntries will be later sorted and appended to typeIndexToTokenMapBlob
sigInOffsetEntries.Add(new KeyValuePair <uint, uint>(typeIndex, sigInOffset));
}
else
{
typeIndexToTokenMapBlob.WriteDWORD(typeIndex);
typeIndexToTokenMapBlob.WriteDWORD(typeDataBlob.Size());
typeDataBlob.WriteBuffer(blobBuilder);
}
}
// sort sigInOffsetEntries based on sigInOffset
sigInOffsetEntries.Sort((KeyValuePair <uint, uint> left, KeyValuePair <uint, uint> right) =>
{
if (left.Value < right.Value)
{
return(-1);
}
if (left.Value == right.Value)
{
return(0);
}
return(1);
});
// write the sorted sigInOffsetEntries
foreach (KeyValuePair <uint, uint> sigInOffsetEntry in sigInOffsetEntries)
{
typeIndexToTokenMapBlob.WriteDWORD(sigInOffsetEntry.Key);
typeIndexToTokenMapBlob.WriteDWORD(sigInOffsetEntry.Value);
}
// add typeDataBlob to the end of m_typeIndexToTokenMapBlob
typeIndexToTokenMapBlob.WriteBuffer(typeDataBlob.ToArray());
return(typeIndexToTokenMapBlob);
}
public WindowsDebugPseudoAssemblySection(TypeSystemContext typeSystemContext)
{
_pseudoAssembly = new ManagedBinaryEmitter(typeSystemContext, "PseudoAssembly");
}