protected override void FinalizeRuntimeSpecificStaticFieldLayout(TypeSystemContext context, ref ComputedStaticFieldLayout layout)
{
// If the size of GCStatics is equal to the size set in PrepareRuntimeSpecificStaticFieldLayout, we
// don't have any GC statics
if (layout.GcStatics.Size == context.Target.PointerSize)
{
layout.GcStatics.Size = 0;
}
}
/// <summary>
/// Called during static field layout to finish static block layout
/// </summary>
protected virtual void FinalizeRuntimeSpecificStaticFieldLayout(TypeSystemContext context, ref ComputedStaticFieldLayout layout)
{
}
protected override void PrepareRuntimeSpecificStaticFieldLayout(TypeSystemContext context, ref ComputedStaticFieldLayout layout)
{
// GC statics start with a pointer to the "EEType" that signals the size and GCDesc to the GC
layout.GcStatics.Size = context.Target.PointerSize;
}
/// <summary>
/// Called during static field layout to finish static block layout
/// </summary>
protected virtual void FinalizeRuntimeSpecificStaticFieldLayout(TypeSystemContext context, ref ComputedStaticFieldLayout layout)
{
}
public override ComputedStaticFieldLayout ComputeStaticFieldLayout(DefType type, StaticLayoutKind layoutKind)
{
if (!type.IsTemplateUniversal() && (layoutKind == StaticLayoutKind.StaticRegionSizes))
{
return ParseStaticRegionSizesFromNativeLayout(type);
}
LowLevelList<int> fieldOffsets;
int[] position = ComputeTypeSizeAndAlignment(type, FieldLoadState.Statics, out fieldOffsets);
int numStaticFields = 0;
foreach (NativeLayoutFieldDesc field in type.NativeLayoutFields)
{
if (field.IsStatic)
{
numStaticFields++;
}
}
ComputedStaticFieldLayout layout = new ComputedStaticFieldLayout();
layout.Offsets = new FieldAndOffset[numStaticFields];
if (numStaticFields > 0)
{
layout.GcStatics = new StaticsBlock() { Size = position[(int)NativeFormat.FieldStorage.GCStatic], LargestAlignment = DefType.MaximumAlignmentPossible };
layout.NonGcStatics = new StaticsBlock() { Size = position[(int)NativeFormat.FieldStorage.NonGCStatic], LargestAlignment = DefType.MaximumAlignmentPossible };
layout.ThreadStatics = new StaticsBlock() { Size = position[(int)NativeFormat.FieldStorage.TLSStatic], LargestAlignment = DefType.MaximumAlignmentPossible };
}
int curStaticField = 0;
foreach (NativeLayoutFieldDesc field in type.NativeLayoutFields)
{
if (field.IsStatic)
{
layout.Offsets[curStaticField] = new FieldAndOffset(field, fieldOffsets[curStaticField]);
curStaticField++;
}
}
return layout;
}
private ComputedStaticFieldLayout ParseStaticRegionSizesFromNativeLayout(TypeDesc type)
{
int nonGcDataSize = 0;
int gcDataSize = 0;
int threadDataSize = 0;
TypeBuilderState state = type.GetOrCreateTypeBuilderState();
NativeParser typeInfoParser = state.GetParserForNativeLayoutInfo();
BagElementKind kind;
while ((kind = typeInfoParser.GetBagElementKind()) != BagElementKind.End)
{
switch (kind)
{
case BagElementKind.NonGcStaticDataSize:
TypeLoaderLogger.WriteLine("Found BagElementKind.NonGcStaticDataSize");
// Use checked typecast to int to ensure there aren't any overflows/truncations (size value used in allocation of memory later)
nonGcDataSize = checked((int)typeInfoParser.GetUnsigned());
break;
case BagElementKind.GcStaticDataSize:
TypeLoaderLogger.WriteLine("Found BagElementKind.GcStaticDataSize");
// Use checked typecast to int to ensure there aren't any overflows/truncations (size value used in allocation of memory later)
gcDataSize = checked((int)typeInfoParser.GetUnsigned());
break;
case BagElementKind.ThreadStaticDataSize:
TypeLoaderLogger.WriteLine("Found BagElementKind.ThreadStaticDataSize");
// Use checked typecast to int to ensure there aren't any overflows/truncations (size value used in allocation of memory later)
threadDataSize = checked((int)typeInfoParser.GetUnsigned());
break;
default:
typeInfoParser.SkipInteger();
break;
}
}
ComputedStaticFieldLayout staticLayout = new ComputedStaticFieldLayout()
{
GcStatics = new StaticsBlock() { Size = gcDataSize, LargestAlignment = DefType.MaximumAlignmentPossible },
NonGcStatics = new StaticsBlock() { Size = nonGcDataSize, LargestAlignment = DefType.MaximumAlignmentPossible },
Offsets = null, // We're not computing field offsets here, so return null
ThreadStatics = new StaticsBlock() { Size = threadDataSize, LargestAlignment = DefType.MaximumAlignmentPossible },
};
return staticLayout;
}