private static unsafe void GenerateMetadataForProperty(PropertyAnalysis property, byte *pMetadataBlob, ref uint offset, uint blobSize)
{
Debug.Assert(property != null);
Debug.Assert(pMetadataBlob != null);
// Check if this property is a nested struct.
InvokeTypeInfo invokeTypeInfo = property.typeInfo as InvokeTypeInfo;
if (invokeTypeInfo != null)
{
// Each nested struct is serialized as:
// TypeCode.Object : 4 bytes
// Number of properties : 4 bytes
// Property description 0...N
// Nested struct property name : NULL-terminated string.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)TypeCode.Object);
// Get the set of properties to be serialized.
PropertyAnalysis[] properties = invokeTypeInfo.properties;
if (properties != null)
{
// Write the count of serializable properties.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)properties.Length);
foreach (PropertyAnalysis prop in properties)
{
GenerateMetadataForProperty(prop, pMetadataBlob, ref offset, blobSize);
}
}
else
{
// This struct has zero serializable properties so we just write the property count.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)0);
}
// Write the property name.
fixed(char *pPropertyName = property.name)
{
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (byte *)pPropertyName, ((uint)property.name.Length + 1) * 2);
}
}
else
{
// Each primitive type is serialized as:
// TypeCode : 4 bytes
// PropertyName : NULL-terminated string
TypeCode typeCode = GetTypeCodeExtended(property.typeInfo.DataType);
Debug.Assert(typeCode != TypeCode.Object);
// Write the type code.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)typeCode);
// Write the property name.
fixed(char *pPropertyName = property.name)
{
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (byte *)pPropertyName, ((uint)property.name.Length + 1) * 2);
}
}
}
internal unsafe bool GenerateMetadata(byte *pMetadataBlob, ref uint offset, uint blobSize)
{
TypeCode typeCode = GetTypeCodeExtended(ParameterType);
if (typeCode == TypeCode.Object)
{
// Each nested struct is serialized as:
// TypeCode.Object : 4 bytes
// Number of properties : 4 bytes
// Property description 0...N
// Nested struct property name : NULL-terminated string.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)TypeCode.Object);
if (!(TypeInfo is InvokeTypeInfo invokeTypeInfo))
{
return(false);
}
// Get the set of properties to be serialized.
PropertyAnalysis[]? properties = invokeTypeInfo.properties;
if (properties != null)
{
// Write the count of serializable properties.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)properties.Length);
foreach (PropertyAnalysis prop in properties)
{
if (!GenerateMetadataForProperty(prop, pMetadataBlob, ref offset, blobSize))
{
return(false);
}
}
}
else
{
// This struct has zero serializable properties so we just write the property count.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)0);
}
// Top-level structs don't have a property name, but for simplicity we write a NULL-char to represent the name.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, '\0');
}
else
{
// Write parameter type.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)typeCode);
// Write parameter name.
fixed(char *pParameterName = ParameterName)
{
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (byte *)pParameterName, ((uint)ParameterName.Length + 1) * 2);
}
}
return(true);
}
private static unsafe bool GenerateMetadataForNamedTypeV2(string name, TraceLoggingTypeInfo typeInfo, byte *pMetadataBlob, ref uint offset, uint blobSize)
{
Debug.Assert(pMetadataBlob != null);
if (!GetMetadataLengthForNamedTypeV2(name, typeInfo, out uint length))
{
return(false);
}
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, length);
// Write the property name.
fixed(char *pPropertyName = name)
{
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (byte *)pPropertyName, ((uint)name.Length + 1) * 2);
}
return(GenerateMetadataForTypeV2(typeInfo, pMetadataBlob, ref offset, blobSize));
}
private static unsafe bool GenerateMetadataForTypeV2(TraceLoggingTypeInfo?typeInfo, byte *pMetadataBlob, ref uint offset, uint blobSize)
{
Debug.Assert(typeInfo != null);
Debug.Assert(pMetadataBlob != null);
// Check if this type is a nested struct.
if (typeInfo is InvokeTypeInfo invokeTypeInfo)
{
// Each nested struct is serialized as:
// TypeCode.Object : 4 bytes
// Number of properties : 4 bytes
// Property description 0...N
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)TypeCode.Object);
// Get the set of properties to be serialized.
PropertyAnalysis[]? properties = invokeTypeInfo.properties;
if (properties != null)
{
// Write the count of serializable properties.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)properties.Length);
foreach (PropertyAnalysis prop in properties)
{
if (!GenerateMetadataForNamedTypeV2(prop.name, prop.typeInfo, pMetadataBlob, ref offset, blobSize))
{
return(false);
}
}
}
else
{
// This struct has zero serializable properties so we just write the property count.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)0);
}
}
else if (typeInfo is EnumerableTypeInfo enumerableTypeInfo)
{
// Each enumerable is serialized as:
// TypeCode.Array : 4 bytes
// ElementType : N bytes
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, EventPipeTypeCodeArray);
GenerateMetadataForTypeV2(enumerableTypeInfo.ElementInfo, pMetadataBlob, ref offset, blobSize);
}
else if (typeInfo is ScalarArrayTypeInfo arrayTypeInfo)
{
// Each enumerable is serialized as:
// TypeCode.Array : 4 bytes
// ElementType : N bytes
if (!arrayTypeInfo.DataType.HasElementType)
{
return(false);
}
TraceLoggingTypeInfo?elementTypeInfo;
if (!GetTypeInfoFromType(arrayTypeInfo.DataType.GetElementType(), out elementTypeInfo))
{
return(false);
}
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, EventPipeTypeCodeArray);
GenerateMetadataForTypeV2(elementTypeInfo, pMetadataBlob, ref offset, blobSize);
}
else
{
// Each primitive type is serialized as:
// TypeCode : 4 bytes
TypeCode typeCode = GetTypeCodeExtended(typeInfo.DataType);
// EventPipe does not support this type. Throw, which will cause no metadata to be registered for this event.
if (typeCode == TypeCode.Object)
{
return(false);
}
// Write the type code.
EventPipeMetadataGenerator.WriteToBuffer(pMetadataBlob, blobSize, ref offset, (uint)typeCode);
}
return(true);
}