|
private CheckLinktimeDemands ( |
||
| module | ||
| metadataToken | int | |
| return | void | |
internal static unsafe object[] GetCustomAttributes(Module decoratedModule, int decoratedMetadataToken, int pcaCount, RuntimeType attributeFilterType, bool mustBeInheritable, IList derivedAttributes)
{
if (decoratedModule.Assembly.ReflectionOnly)
{
throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA"));
}
MetadataImport metadataImport = decoratedModule.MetadataImport;
CustomAttributeRecord[] customAttributeRecords = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken);
Type elementType = (((attributeFilterType == null) || attributeFilterType.IsValueType) || attributeFilterType.ContainsGenericParameters) ? typeof(object) : attributeFilterType;
if ((attributeFilterType == null) && (customAttributeRecords.Length == 0))
{
return (Array.CreateInstance(elementType, 0) as object[]);
}
object[] attributes = Array.CreateInstance(elementType, customAttributeRecords.Length) as object[];
int length = 0;
SecurityContextFrame frame = new SecurityContextFrame();
frame.Push(decoratedModule.Assembly.InternalAssembly);
Assembly lastAptcaOkAssembly = null;
for (int i = 0; i < customAttributeRecords.Length; i++)
{
bool flag2;
bool flag3;
object obj2 = null;
CustomAttributeRecord caRecord = customAttributeRecords[i];
RuntimeMethodHandle ctor = new RuntimeMethodHandle();
RuntimeType attributeType = null;
int namedArgs = 0;
IntPtr signature = caRecord.blob.Signature;
IntPtr blobEnd = (IntPtr) (((void*) signature) + caRecord.blob.Length);
if (FilterCustomAttributeRecord(caRecord, metadataImport, ref lastAptcaOkAssembly, decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable, attributes, derivedAttributes, out attributeType, out ctor, out flag2, out flag3))
{
if (!ctor.IsNullHandle())
{
ctor.CheckLinktimeDemands(decoratedModule, decoratedMetadataToken);
}
RuntimeConstructorInfo.CheckCanCreateInstance(attributeType, flag3);
if (flag2)
{
obj2 = CreateCaObject(decoratedModule, ctor, ref signature, blobEnd, out namedArgs);
}
else
{
obj2 = attributeType.TypeHandle.CreateCaInstance(ctor);
if (Marshal.ReadInt16(signature) != 1)
{
throw new CustomAttributeFormatException();
}
signature = (IntPtr) (((void*) signature) + 2);
namedArgs = Marshal.ReadInt16(signature);
signature = (IntPtr) (((void*) signature) + 2);
}
for (int j = 0; j < namedArgs; j++)
{
string str;
bool flag4;
Type type3;
object obj3;
IntPtr ptr1 = caRecord.blob.Signature;
GetPropertyOrFieldData(decoratedModule, ref signature, blobEnd, out str, out flag4, out type3, out obj3);
try
{
if (flag4)
{
if ((type3 == null) && (obj3 != null))
{
type3 = (obj3.GetType() == typeof(RuntimeType)) ? typeof(Type) : obj3.GetType();
}
RuntimePropertyInfo property = null;
if (type3 == null)
{
property = attributeType.GetProperty(str) as RuntimePropertyInfo;
}
else
{
property = attributeType.GetProperty(str, type3, Type.EmptyTypes) as RuntimePropertyInfo;
}
RuntimeMethodInfo setMethod = property.GetSetMethod(true) as RuntimeMethodInfo;
if (setMethod.IsPublic)
{
setMethod.MethodHandle.CheckLinktimeDemands(decoratedModule, decoratedMetadataToken);
setMethod.Invoke(obj2, BindingFlags.Default, null, new object[] { obj3 }, null, true);
}
}
else
{
(attributeType.GetField(str) as RtFieldInfo).InternalSetValue(obj2, obj3, BindingFlags.Default, Type.DefaultBinder, null, false);
}
}
catch (Exception exception)
{
throw new CustomAttributeFormatException(string.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString(flag4 ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), new object[] { str }), exception);
}
}
if (!signature.Equals(blobEnd))
{
throw new CustomAttributeFormatException();
}
attributes[length++] = obj2;
}
}
frame.Pop();
if ((length == customAttributeRecords.Length) && (pcaCount == 0))
{
return attributes;
}
if (length == 0)
{
Array.CreateInstance(elementType, 0);
}
object[] destinationArray = Array.CreateInstance(elementType, (int) (length + pcaCount)) as object[];
Array.Copy(attributes, 0, destinationArray, 0, length);
return destinationArray;
}
internal unsafe static object[] GetCustomAttributes(
Module decoratedModule, int decoratedMetadataToken, int pcaCount,
RuntimeType attributeFilterType, bool mustBeInheritable, IList derivedAttributes)
{
if (decoratedModule.Assembly.ReflectionOnly)
throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA"));
MetadataImport scope = decoratedModule.MetadataImport;
CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken);
bool useObjectArray = (attributeFilterType == null || attributeFilterType.IsValueType || attributeFilterType.ContainsGenericParameters);
Type arrayType = useObjectArray ? typeof(object) : attributeFilterType;
if (attributeFilterType == null && car.Length == 0)
return Array.CreateInstance(arrayType, 0) as object[];
object[] attributes = Array.CreateInstance(arrayType, car.Length) as object[];
int cAttributes = 0;
// Custom attribute security checks are done with respect to the assembly *decorated* with the
// custom attribute as opposed to the *caller of GetCustomAttributes*.
// Since this assembly might not be on the stack and the attribute ctor or property setters we're about to invoke may
// make security demands, we push a frame on the stack as a proxy for the decorated assembly (this frame will be picked
// up an interpreted by the security stackwalker).
// Once we push the frame it will be automatically popped in the event of an exception, so no need to use CERs or the
// like.
SecurityContextFrame frame = new SecurityContextFrame();
frame.Push(decoratedModule.Assembly);
// Optimization for the case where attributes decorate entities in the same assembly in which case
// we can cache the successful APTCA check between the decorated and the declared assembly.
Assembly lastAptcaOkAssembly = null;
for (int i = 0; i < car.Length; i++)
{
object attribute = null;
CustomAttributeRecord caRecord = car[i];
RuntimeMethodHandle ctor = new RuntimeMethodHandle();
RuntimeType attributeType = null;
bool ctorHasParameters, isVarArg;
int cNamedArgs = 0;
IntPtr blobStart = caRecord.blob.Signature;
IntPtr blobEnd = (IntPtr)((byte*)blobStart + caRecord.blob.Length);
if (!FilterCustomAttributeRecord(caRecord, scope, ref lastAptcaOkAssembly,
decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable,
attributes, derivedAttributes,
out attributeType, out ctor, out ctorHasParameters, out isVarArg))
continue;
if (!ctor.IsNullHandle())
{
// Linktime demand checks
// decoratedMetadataToken needed as it may be "transparent" in which case we do a full stack walk
ctor.CheckLinktimeDemands(decoratedModule, decoratedMetadataToken);
}
else
{
}
// Leverage RuntimeConstructorInfo standard .ctor verfication
RuntimeConstructorInfo.CheckCanCreateInstance(attributeType, isVarArg);
// Create custom attribute object
if (ctorHasParameters)
{
attribute = CreateCaObject(decoratedModule, ctor, ref blobStart, blobEnd, out cNamedArgs);
}
else
{
attribute = attributeType.TypeHandle.CreateCaInstance(ctor);
if (Marshal.ReadInt16(blobStart) != 1)
throw new CustomAttributeFormatException();
blobStart = (IntPtr)((byte*)blobStart + 2); // skip 0x0001 prefix
cNamedArgs = Marshal.ReadInt16(blobStart);
blobStart = (IntPtr)((byte*)blobStart + 2); // skip namedArgs count
}
for (int j = 0; j < cNamedArgs; j++)
{
#region // Initialize named properties and fields
string name;
bool isProperty;
Type type;
object value;
IntPtr blobItr = caRecord.blob.Signature;
GetPropertyOrFieldData(decoratedModule, ref blobStart, blobEnd, out name, out isProperty, out type, out value);
try
{
if (isProperty)
{
#region // Initialize property
if (type == null && value != null)
type = (value.GetType() == typeof(RuntimeType)) ? typeof(Type) : value.GetType();
RuntimePropertyInfo property = null;
if (type == null)
property = attributeType.GetProperty(name) as RuntimePropertyInfo;
else
property = attributeType.GetProperty(name, type, Type.EmptyTypes) as RuntimePropertyInfo;
RuntimeMethodInfo setMethod = property.GetSetMethod(true) as RuntimeMethodInfo;
// Public properties may have non-public setter methods
if (!setMethod.IsPublic)
continue;
setMethod.MethodHandle.CheckLinktimeDemands(decoratedModule, decoratedMetadataToken);
setMethod.Invoke(attribute, BindingFlags.Default, null, new object[] { value }, null, true);
#endregion
}
else
{
RtFieldInfo field = attributeType.GetField(name) as RtFieldInfo;
field.InternalSetValue(attribute, value, BindingFlags.Default, Type.DefaultBinder, null, false);
}
}
catch (Exception e)
{
throw new CustomAttributeFormatException(
String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString(
isProperty ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), name), e);
}
#endregion
}
if (!blobStart.Equals(blobEnd))
throw new CustomAttributeFormatException();
attributes[cAttributes++] = attribute;
}
// The frame will be popped automatically if we take an exception any time after we pushed it. So no need of a catch or
// finally or CERs here.
frame.Pop();
if (cAttributes == car.Length && pcaCount == 0)
return attributes;
if (cAttributes == 0)
Array.CreateInstance(arrayType, 0);
object[] result = Array.CreateInstance(arrayType, cAttributes + pcaCount) as object[];
Array.Copy(attributes, 0, result, 0, cAttributes);
return result;
}
