public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
if (relocsOnly)
{
return(new ObjectData(
data: Array.Empty <byte>(),
relocs: Array.Empty <Relocation>(),
alignment: 1,
definedSymbols: new ISymbolDefinitionNode[] { this }));
}
ObjectDataBuilder builder = new ObjectDataBuilder(factory, relocsOnly);
builder.RequireInitialAlignment(4);
builder.AddSymbol(this);
DirectoryEntry resourcesDirectory = _module.PEReader.PEHeaders.CorHeader.ResourcesDirectory;
PEMemoryBlock block = _module.PEReader.GetSectionData(resourcesDirectory.RelativeVirtualAddress);
builder.EmitBytes(block.GetReader().ReadBytes(resourcesDirectory.Size));
return(builder.ToObjectData());
}
public void AddSymbol(ISymbolDefinitionNode symbol)
{
_builder.AddSymbol(symbol);
}
public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
ObjectDataBuilder builder = new ObjectDataBuilder(factory, relocsOnly);
builder.RequireInitialPointerAlignment();
builder.AddSymbol(this);
ImmutableArray <DebugDirectoryEntry> entries = default(ImmutableArray <DebugDirectoryEntry>);
if (_module != null)
{
entries = _module.PEReader.ReadDebugDirectory();
}
int numEntries = GetNumDebugDirectoryEntriesInModule();
// First, write the native debug directory entry
{
var entry = _nativeEntry;
builder.EmitUInt(0 /* Characteristics */);
if (numEntries > 0)
{
builder.EmitUInt(entries[0].Stamp);
builder.EmitUShort(entries[0].MajorVersion);
}
else
{
builder.EmitUInt(0);
builder.EmitUShort(0);
}
// Make sure the "is portable pdb" indicator (MinorVersion == 0x504d) is clear
// for the NGen debug directory entry since this debug directory can be copied
// from an existing entry which could be a portable pdb.
builder.EmitUShort(0 /* MinorVersion */);
builder.EmitInt((int)DebugDirectoryEntryType.CodeView);
builder.EmitInt(entry.Size);
builder.EmitReloc(entry, RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitReloc(entry, RelocType.IMAGE_REL_FILE_ABSOLUTE);
}
// If generating a composite image, emit the deterministic marker
if (_insertDeterministicEntry)
{
builder.EmitUInt(0 /* Characteristics */);
builder.EmitUInt(0);
builder.EmitUShort(0);
builder.EmitUShort(0);
builder.EmitInt((int)DebugDirectoryEntryType.Reproducible);
builder.EmitInt(0);
builder.EmitUInt(0);
builder.EmitUInt(0);
}
// Second, copy existing entries from input module
for (int i = 0; i < numEntries; i++)
{
builder.EmitUInt(0 /* Characteristics */);
builder.EmitUInt(entries[i].Stamp);
builder.EmitUShort(entries[i].MajorVersion);
builder.EmitUShort(entries[i].MinorVersion);
builder.EmitInt((int)entries[i].Type);
builder.EmitInt(entries[i].DataSize);
if (entries[i].DataSize == 0)
{
builder.EmitUInt(0);
builder.EmitUInt(0);
}
else
{
builder.EmitReloc(factory.DebugDirectoryEntry(_module, i), RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitReloc(factory.DebugDirectoryEntry(_module, i), RelocType.IMAGE_REL_FILE_ABSOLUTE);
}
}
Debug.Assert(builder.CountBytes == Size);
return(builder.ToObjectData());
}
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 }));
}
List <CustomAttributeEntry> customAttributeEntries = GetCustomAttributeEntries();
int countOfEntries = customAttributeEntries.Count;
if (countOfEntries == 0)
{
return(new ObjectData(Array.Empty <byte>(), Array.Empty <Relocation>(), 1, new ISymbolDefinitionNode[] { this }));
}
// Buckets have 8 entries
uint minTableBucketCount = (uint)(countOfEntries / 8) + 1;
uint bucketCount = 1;
// Bucket count must be power of two
while (bucketCount < minTableBucketCount)
{
bucketCount *= 2;
}
// Resize the array.
bool tryAgainWithBiggerTable = false;
int countOfRetries = 0;
ushort[] pTable;
do
{
tryAgainWithBiggerTable = false;
uint actualSizeOfTable = bucketCount * 8; // Buckets have 8 entries in them
pTable = new ushort[actualSizeOfTable];
uint[] state = new uint[] { 729055690, 833774698, 218408041, 493449127 };
// Attempt to fill table
foreach (var customAttributeEntry in customAttributeEntries)
{
string name = customAttributeEntry.TypeNamespace + "." + customAttributeEntry.TypeName;
// This hashing algorithm MUST match exactly the logic in NativeCuckooFilter
int hashOfAttribute = ReadyToRunHashCode.NameHashCode(name);
uint hash = unchecked ((uint)ReadyToRunHashCode.CombineTwoValuesIntoHash((uint)hashOfAttribute, (uint)customAttributeEntry.Parent));
ushort fingerprint = (ushort)(hash >> 16);
if (fingerprint == 0)
{
fingerprint = 1;
}
uint bucketAIndex = hash % bucketCount;
uint fingerprintHash = (uint)fingerprint;
uint bucketBIndex = (bucketAIndex ^ (fingerprintHash % bucketCount));
Debug.Assert(bucketAIndex == (bucketBIndex ^ (fingerprintHash % bucketCount)));
if ((XorShift128(state) & 1) != 0) // Randomly choose which bucket to attempt to fill first
{
uint temp = bucketAIndex;
bucketAIndex = bucketBIndex;
bucketBIndex = temp;
}
Func <uint, ushort, bool> hasEntryInBucket = (uint bucketIndex, ushort fprint) =>
{
for (int i = 0; i < 8; i++)
{
if (pTable[(bucketIndex * 8) + i] == fprint)
{
return(true);
}
}
return(false);
};
Func <uint, bool> isEmptyEntryInBucket = (uint bucketIndex) =>
{
for (int i = 0; i < 8; i++)
{
if (pTable[(bucketIndex * 8) + i] == 0)
{
return(true);
}
}
return(false);
};
Action <uint, ushort> fillEmptyEntryInBucket = (uint bucketIndex, ushort fprint) =>
{
for (int i = 0; i < 8; i++)
{
if (pTable[(bucketIndex * 8) + i] == 0)
{
pTable[(bucketIndex * 8) + i] = fprint;
return;
}
}
Debug.Assert(false, "Not possible to reach here");
};
// Scan for pre-existing fingerprint entry in buckets
if (hasEntryInBucket(bucketAIndex, fingerprint) || hasEntryInBucket(bucketBIndex, fingerprint))
{
continue;
}
// Determine if there is space in a bucket to add a new entry
if (isEmptyEntryInBucket(bucketAIndex))
{
fillEmptyEntryInBucket(bucketAIndex, fingerprint);
continue;
}
if (isEmptyEntryInBucket(bucketBIndex))
{
fillEmptyEntryInBucket(bucketBIndex, fingerprint);
continue;
}
bool success = false;
int MaxNumKicks = 256;
// Note, that bucketAIndex itself was chosen randomly above.
for (int n = 0; !success && n < MaxNumKicks; n++)
{
// Randomly swap an entry in bucket bucketAIndex with fingerprint
uint entryIndexInBucket = XorShift128(state) & 0x7;
ushort temp = fingerprint;
fingerprint = pTable[(bucketAIndex * 8) + entryIndexInBucket];
pTable[(bucketAIndex * 8) + entryIndexInBucket] = temp;
// Find other bucket
fingerprintHash = (uint)fingerprint;
bucketAIndex = bucketAIndex ^ (fingerprintHash % bucketCount);
if (isEmptyEntryInBucket(bucketAIndex))
{
fillEmptyEntryInBucket(bucketAIndex, fingerprint);
success = true;
}
}
if (success)
{
continue;
}
tryAgainWithBiggerTable = true;
}
if (tryAgainWithBiggerTable)
{
// bucket entry kicking path requires bucket counts to be power of two in size due to use of xor to retrieve second hash
bucketCount *= 2;
}
}while(tryAgainWithBiggerTable && ((countOfRetries++) < 2));
byte[] result;
if (tryAgainWithBiggerTable)
{
result = Array.Empty <byte>();
}
else
{
result = new byte[pTable.Length * 2];
for (int i = 0; i < pTable.Length; i++)
{
result[i * 2] = (byte)(pTable[i] % 256);
result[i * 2 + 1] = (byte)(pTable[i] >> 8);
}
}
ObjectDataBuilder builder = new ObjectDataBuilder(factory, relocsOnly);
builder.RequireInitialAlignment(16);
builder.AddSymbol(this);
builder.EmitBytes(result);
return(builder.ToObjectData());;
}
public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
ObjectDataBuilder builder = new ObjectDataBuilder(factory, relocsOnly);
builder.RequireInitialPointerAlignment();
builder.AddSymbol(this);
BlobReader reader = _module.PEReader.GetEntireImage().GetReader();
reader.Offset = _module.PEReader.PEHeaders.CorHeaderStartOffset;
// Header Size
int headerSize = reader.ReadInt32();
builder.EmitInt(headerSize);
// Runtime major, minor version
builder.EmitUShort(reader.ReadUInt16());
builder.EmitUShort(reader.ReadUInt16());
// Metadata Directory
ReadDirectoryEntry(ref reader);
var metadataBlob = factory.CopiedMetadataBlob(_module);
builder.EmitReloc(metadataBlob, RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitInt(metadataBlob.Size);
// Flags
builder.EmitUInt((uint)(((CorFlags)reader.ReadUInt32() & ~CorFlags.ILOnly) | CorFlags.ILLibrary));
// Entrypoint
builder.EmitInt(reader.ReadInt32());
// Resources Directory
if (ReadDirectoryEntry(ref reader).Size > 0)
{
var managedResources = factory.CopiedManagedResources(_module);
builder.EmitReloc(managedResources, RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitInt(managedResources.Size);
}
else
{
WriteEmptyDirectoryEntry(ref builder);
}
// Strong Name Signature Directory
if (ReadDirectoryEntry(ref reader).Size > 0)
{
var strongNameSignature = factory.CopiedStrongNameSignature(_module);
builder.EmitReloc(strongNameSignature, RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitInt(strongNameSignature.Size);
}
else
{
WriteEmptyDirectoryEntry(ref builder);
}
// Code Manager Table Directory
ReadDirectoryEntry(ref reader);
WriteEmptyDirectoryEntry(ref builder);
// VTable Fixups Directory
ReadDirectoryEntry(ref reader);
WriteEmptyDirectoryEntry(ref builder);
// Export Address Table Jumps Directory
ReadDirectoryEntry(ref reader);
WriteEmptyDirectoryEntry(ref builder);
// Managed Native (ReadyToRun) Header Directory
ReadDirectoryEntry(ref reader);
builder.EmitReloc(factory.Header, RelocType.IMAGE_REL_BASED_ADDR32NB);
builder.EmitReloc(factory.Header, RelocType.IMAGE_REL_SYMBOL_SIZE);
// Did we fully read the header?
Debug.Assert(reader.Offset - headerSize == _module.PEReader.PEHeaders.CorHeaderStartOffset);
Debug.Assert(builder.CountBytes == headerSize);
Debug.Assert(headerSize == Size);
return(builder.ToObjectData());
}