public FieldAndOffset[] GetOrAddDynamicLayout(DefType defType, ModuleFieldLayout moduleFieldLayout)
{
FieldAndOffset[] fieldsForType;
if (!moduleFieldLayout.TryGetDynamicLayout(defType, out fieldsForType))
{
int nonGcOffset;
switch (moduleFieldLayout.Module.Context.Target.PointerSize)
{
case 4:
nonGcOffset = DomainLocalModuleNormalDynamicEntryOffsetOfDataBlob32Bit;
break;
case 8:
nonGcOffset = DomainLocalModuleNormalDynamicEntryOffsetOfDataBlob64Bit;
break;
default:
throw new NotImplementedException();
}
OffsetsForType offsetsForType = new OffsetsForType(
nonGcOffset: new LayoutInt(nonGcOffset),
tlsNonGcOffset: new LayoutInt(nonGcOffset),
gcOffset: LayoutInt.Zero,
tlsGcOffset: LayoutInt.Zero);
fieldsForType = CalculateTypeLayout(defType, moduleFieldLayout.Module, offsetsForType);
moduleFieldLayout.AddDynamicLayout(defType, fieldsForType);
}
return(fieldsForType);
}
protected override ModuleFieldLayout CreateValueFromKey(EcmaModule module)
{
int typeCountInModule = module.MetadataReader.GetTableRowCount(TableIndex.TypeDef);
int pointerSize = module.Context.Target.PointerSize;
// 0 corresponds to "normal" statics, 1 to thread-local statics
LayoutInt[] gcStatics = new LayoutInt[StaticIndex.Count]
{
LayoutInt.Zero,
LayoutInt.Zero
};
LayoutInt[] nonGcStatics = new LayoutInt[StaticIndex.Count]
{
new LayoutInt(DomainLocalModuleDataBlobOffsetAsIntPtrCount * pointerSize + typeCountInModule),
new LayoutInt(ThreadLocalModuleDataBlobOffsetAsIntPtrCount * pointerSize + typeCountInModule),
};
Dictionary <TypeDefinitionHandle, OffsetsForType> typeOffsets = new Dictionary <TypeDefinitionHandle, OffsetsForType>();
foreach (TypeDefinitionHandle typeDefHandle in module.MetadataReader.TypeDefinitions)
{
TypeDefinition typeDef = module.MetadataReader.GetTypeDefinition(typeDefHandle);
if (typeDef.GetGenericParameters().Count != 0)
{
// Generic types are exempt from the static field layout algorithm, see
// <a href="https://github.com/dotnet/coreclr/blob/659af58047a949ed50d11101708538d2e87f2568/src/vm/ceeload.cpp#L2049">this check</a>.
continue;
}
// 0 corresponds to "normal" statics, 1 to thread-local statics
int[] nonGcAlignment = new int[StaticIndex.Count] {
1, 1,
};
int[] nonGcBytes = new int[StaticIndex.Count] {
0, 0,
};
int[] gcBytes = new int[StaticIndex.Count] {
0, 0,
};
foreach (FieldDefinitionHandle fieldDefHandle in typeDef.GetFields())
{
FieldDefinition fieldDef = module.MetadataReader.GetFieldDefinition(fieldDefHandle);
if ((fieldDef.Attributes & (FieldAttributes.Static | FieldAttributes.Literal)) == FieldAttributes.Static)
{
int index = (IsFieldThreadStatic(in fieldDef, module.MetadataReader) ? StaticIndex.ThreadLocal : StaticIndex.Regular);
int alignment;
int size;
bool isGcPointerField;
bool isGcBoxedField;
CorElementType corElementType;
EntityHandle valueTypeHandle;
GetFieldElementTypeAndValueTypeHandle(in fieldDef, module.MetadataReader, out corElementType, out valueTypeHandle);
FieldDesc fieldDesc = module.GetField(fieldDefHandle);
GetElementTypeInfo(module, fieldDesc, valueTypeHandle, corElementType, pointerSize, moduleLayout: true,
out alignment, out size, out isGcPointerField, out isGcBoxedField);
if (size != 0)
{
nonGcBytes[index] += size;
nonGcAlignment[index] = Math.Max(nonGcAlignment[index], alignment);
}
if (isGcPointerField || isGcBoxedField)
{
gcBytes[index] += pointerSize;
}
}
}
if (nonGcBytes[StaticIndex.Regular] != 0 ||
nonGcBytes[StaticIndex.ThreadLocal] != 0 ||
gcBytes[StaticIndex.Regular] != 0 ||
gcBytes[StaticIndex.ThreadLocal] != 0)
{
OffsetsForType offsetsForType = new OffsetsForType(LayoutInt.Indeterminate, LayoutInt.Indeterminate, LayoutInt.Indeterminate, LayoutInt.Indeterminate);
for (int staticIndex = 0; staticIndex < StaticIndex.Count; staticIndex++)
{
if (nonGcBytes[staticIndex] != 0)
{
offsetsForType.NonGcOffsets[staticIndex] = LayoutInt.AlignUp(nonGcStatics[staticIndex], new LayoutInt(nonGcAlignment[staticIndex]), module.Context.Target);
nonGcStatics[staticIndex] = offsetsForType.NonGcOffsets[staticIndex] + new LayoutInt(nonGcBytes[staticIndex]);
}
if (gcBytes[staticIndex] != 0)
{
offsetsForType.GcOffsets[staticIndex] = gcStatics[staticIndex];
gcStatics[staticIndex] += new LayoutInt(gcBytes[staticIndex]);
}
}
typeOffsets.Add(typeDefHandle, offsetsForType);
}
}
LayoutInt blockAlignment = new LayoutInt(TargetDetails.MaximumPrimitiveSize);
return(new ModuleFieldLayout(
module,
gcStatics: new StaticsBlock()
{
Size = gcStatics[StaticIndex.Regular], LargestAlignment = blockAlignment
},
nonGcStatics: new StaticsBlock()
{
Size = nonGcStatics[StaticIndex.Regular], LargestAlignment = blockAlignment
},
threadGcStatics: new StaticsBlock()
{
Size = gcStatics[StaticIndex.ThreadLocal], LargestAlignment = blockAlignment
},
threadNonGcStatics: new StaticsBlock()
{
Size = nonGcStatics[StaticIndex.ThreadLocal], LargestAlignment = blockAlignment
},
typeOffsets: typeOffsets));
}