public override bool TryConvert(ConvertBinder binder, out object result)
{
if (m_type == null)
{
return(ClrNullValue.GetDefaultNullValue(binder.Type, out result));
}
if (binder.Type == typeof(ClrType))
{
// Special case: The caller is requesting the GCHeapType of what we are inspecting.
result = m_type;
return(true);
}
if (binder.Type.IsPrimitive && m_type.IsPrimitive && m_type.HasSimpleValue)
{
result = Convert.ChangeType(m_type.GetValue(m_addr), binder.Type);
return(true);
}
if (binder.Type == typeof(ulong))
{
result = m_addr;
return(true);
}
if (binder.Type == typeof(long))
{
result = (long)m_addr;
return(true);
}
if (binder.Type == typeof(string))
{
if (m_type.IsString)
{
result = m_type.GetValue(m_addr);
}
else
{
result = ToString();
}
return(true);
}
result = null;
return(false);
}
private bool GetArrayValue(ClrType type, ulong addr, int index, out object result)
{
var componentType = type.ComponentType;
// componentType being null is a dac bug which should only happen when we have an array of
// value types, where we have never *actually* constructed one of the types. If there are
// other dac bugs which cause this, we unfortunately cannot work around it.
if (addr == 0 || componentType == null)
{
result = new ClrNullValue(m_heap);
return(true);
}
if (index < 0 || index >= m_len)
{
throw new IndexOutOfRangeException();
}
// Now construct the value based on the element type.
if (componentType.ElementType == ClrElementType.Struct)
{
addr = type.GetArrayElementAddress(addr, index);
result = new ClrObject(m_heap, componentType, addr, true);
return(true);
}
else if (componentType.IsObjectReference)
{
addr = type.GetArrayElementAddress(addr, index);
if (!m_heap.Runtime.ReadPointer(addr, out addr) || addr == 0)
{
result = new ClrNullValue(m_heap);
return(true);
}
else
{
result = new ClrObject(m_heap, componentType, addr);
return(true);
}
}
else if (componentType.IsPrimitive)
{
result = new ClrPrimitiveValue(type.GetArrayElementValue(addr, index), componentType.ElementType);
return(true);
}
result = null;
return(false);
}
public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
if (IsNull())
{
result = new ClrNullValue(m_heap);
return(true);
}
if (m_type.IsArray)
{
// Populate length for bounds check.
if (m_len == -1)
{
m_len = m_type.GetArrayLength(m_addr);
}
int index = GetIndexFromObjects(indexes);
return(GetArrayValue(m_type, m_addr, index, out result));
}
// Dictionary
if (IsDictionary())
{
if (indexes.Length != 1)
{
throw new ArgumentException("Only one index is allowed for Dictionary indexing.");
}
dynamic dict = ((dynamic)this);
dynamic entries = dict.entries;
ClrInstanceField key = ((ClrType)entries).ComponentType.GetFieldByName("key");
// Two cases: The key is an object or string, denoted by "System.__Canon", or it's a primitive.
// otherwise we don't support it.
var keyType = key.Type;
if (keyType.IsObjectReference)
{
Debug.Assert(keyType.Name == "System.__Canon");
if (indexes[0].GetType() == typeof(string))
{
string index = (string)indexes[0];
int len = dict.count;
for (int i = 0; i < len; ++i)
{
if ((string)entries[i].key == index)
{
result = entries[i].value;
return(true);
}
}
throw new KeyNotFoundException();
}
else
{
ulong addr;
if (indexes[0].GetType() == typeof(long))
{
addr = (ulong)(long)indexes[0];
}
else if (indexes[0].GetType() == typeof(ulong))
{
addr = (ulong)indexes[0];
}
else
{
addr = (ulong)(dynamic)indexes[0];
}
int len = dict.count;
for (int i = 0; i < len; ++i)
{
if ((ulong)entries[i].key == addr)
{
result = entries[i].value;
return(true);
}
}
}
}
else if (keyType.IsPrimitive)
{
object index = indexes[0];
if (index is ClrPrimitiveValue)
{
index = ((ClrPrimitiveValue)index).GetValue();
}
Type type = index.GetType();
int len = dict.count;
for (int i = 0; i < len; ++i)
{
ClrPrimitiveValue value = entries[i].key;
if (value.GetValue().Equals(index))
{
result = entries[i].value;
return(true);
}
}
throw new KeyNotFoundException();
}
}
if (IsList())
{
int index = GetIndexFromObjects(indexes);
var itemsField = m_type.GetFieldByName("_items");
ulong addr = (ulong)itemsField.GetValue(m_addr);
// Populate length for bounds check.
if (m_len == -1)
{
var sizeField = m_type.GetFieldByName("_size");
m_len = (int)sizeField.GetValue(m_addr);
}
// If type is null, then we've hit a dac bug. Attempt to work around it,
// but we'll have to give up if getting the object type directly doesn't work.
ClrType type = itemsField.Type;
if (type == null || type.ComponentType == null)
{
type = m_heap.GetObjectType(addr);
if (type == null || type.ComponentType == null)
{
result = new ClrNullValue(m_heap);
return(true);
}
}
return(GetArrayValue(type, addr, index, out result));
}
throw new InvalidOperationException(string.Format("Object of type '{0}' is not indexable.", m_type.Name));
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (IsNull())
{
result = new ClrNullValue(m_heap);
return(true);
}
ClrInstanceField field = null;
if (binder.IgnoreCase)
{
foreach (var inst in m_type.Fields)
{
if (inst.Name.Equals(binder.Name, StringComparison.CurrentCultureIgnoreCase))
{
field = inst;
break;
}
}
}
else
{
field = m_type.GetFieldByName(binder.Name);
}
if (field == null)
{
if (ClrDynamicClass.GetStaticField(m_heap, m_type, binder, out result))
{
return(true);
}
throw new InvalidOperationException(string.Format("Type '{0}' does not contain a '{1}' field.", m_type.Name, binder.Name));
}
if (field.IsPrimitive)
{
object value = field.GetValue(m_addr, m_inner);
if (value == null)
{
result = new ClrNullValue(m_heap);
}
else
{
result = new ClrPrimitiveValue(value, field.ElementType);
}
return(true);
}
else if (field.IsValueClass)
{
ulong addr = field.GetAddress(m_addr, m_inner);
result = new ClrObject(m_heap, field.Type, addr, true);
return(true);
}
else if (field.ElementType == ClrElementType.String)
{
ulong addr = field.GetAddress(m_addr, m_inner);
if (!m_heap.Runtime.ReadPointer(addr, out addr))
{
result = new ClrNullValue(m_heap);
return(true);
}
result = new ClrObject(m_heap, field.Type, addr);
return(true);
}
else
{
object value = field.GetValue(m_addr, m_inner);
if (value == null)
{
result = new ClrNullValue(m_heap);
}
else
{
result = new ClrObject(m_heap, field.Type, (ulong)value);
}
return(true);
}
}
