Add in object type-annotations.

This commit is contained in:
Mike Auty
2017-12-13 20:48:52 +00:00
parent 1dcad91126
commit f50a0b715d
3 changed files with 197 additions and 81 deletions
+166 -68
View File
@@ -15,11 +15,11 @@ class Void(interfaces.objects.ObjectInterface):
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
"""Dummy size for Void objects"""
raise TypeError("Void types are incomplete, cannot contain data and do not have a size")
def write(self, value):
def write(self, value: typing.Any) -> None:
"""Dummy method that does nothing for Void objects"""
raise TypeError("Cannot write data to a void, recast as another object")
@@ -30,16 +30,25 @@ class Function(interfaces.objects.ObjectInterface):
class PrimitiveObject(interfaces.objects.ObjectInterface):
"""PrimitiveObject is an interface for any objects that should simulate a Python primitive"""
_struct_type = int # type: typing.Type
_struct_type = int # type: typing.ClassVar[typing.Type]
def __init__(self, context, type_name, object_info, struct_format):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
struct_format: str) -> None:
super().__init__(context = context,
type_name = type_name,
object_info = object_info,
struct_format = struct_format)
self._struct_format = struct_format
def __new__(cls, context, type_name, object_info, struct_format, **kwargs):
def __new__(cls,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
struct_format: str,
**kwargs) -> typing.Type['PrimitiveObject']:
"""Creates the appropriate class and returns it so that the native type is inherritted
The only reason the **kwargs is added, is so that the inherriting types can override __init__
@@ -51,7 +60,11 @@ class PrimitiveObject(interfaces.objects.ObjectInterface):
object_info.offset))
@classmethod
def _struct_value(cls, context, struct_format, layer_name, offset):
def _struct_value(cls,
context: interfaces.context.ContextInterface,
struct_format: str,
layer_name: str,
offset: int) -> typing.Union[int, float, bool, bytes, str]:
length = struct.calcsize(struct_format)
data = context.memory.read(layer_name, offset, length)
(value,) = struct.unpack(struct_format, data)
@@ -59,11 +72,11 @@ class PrimitiveObject(interfaces.objects.ObjectInterface):
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
"""Returns the size of the templated object"""
return struct.calcsize(template.vol.struct_format)
def write(self, value):
def write(self, value: bytes) -> None:
"""Writes the object into the layer of the context at the current offset"""
if isinstance(value, self._struct_type):
data = struct.pack(self.vol.struct_format, value)
@@ -79,26 +92,35 @@ class Integer(PrimitiveObject, int):
class Float(PrimitiveObject, float):
"""Primitive Object that handles double or floating point numbers"""
_struct_type = float
_struct_type = float # type: typing.ClassVar[typing.Type]
class Char(PrimitiveObject, bytes):
"""Primitive Object that handles characters"""
_struct_type = bytes
_struct_type = bytes # type: typing.ClassVar[typing.Type]
class Bytes(PrimitiveObject, bytes):
"""Primitive Object that handles specific series of bytes"""
_struct_type = bytes
_struct_type = bytes # type: typing.ClassVar[typing.Type]
def __init__(self, context, type_name, object_info, length = 1):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
length: int = 1) -> None:
super().__init__(context = context,
type_name = type_name,
object_info = object_info,
struct_format = str(length) + "s")
self._vol['length'] = length
def __new__(cls, context, type_name, object_info, length = 1, **kwargs):
def __new__(cls,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
length: int = 1,
**kwargs) -> typing.Type['Bytes']:
"""Creates the appropriate class and returns it so that the native type is inherritted
The only reason the **kwargs is added, is so that the inherriting types can override __init__
@@ -118,9 +140,15 @@ class String(PrimitiveObject, str):
:type max_length: int
"""
_struct_type = str
_struct_type = str # type: typing.ClassVar[typing.Type]
def __init__(self, context, type_name, object_info, max_length = 1, encoding = "utf-8", errors = "strict"):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
max_length: int = 1,
encoding: str = "utf-8",
errors: str = "strict") -> None:
super().__init__(context = context,
type_name = type_name,
object_info = object_info,
@@ -129,7 +157,14 @@ class String(PrimitiveObject, str):
self._vol['encoding'] = encoding
self._vol['errors'] = errors
def __new__(cls, context, type_name, object_info, max_length = 1, encoding = "utf-8", errors = "strict", **kwargs):
def __new__(cls,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
max_length: int = 1,
encoding: str = "utf-8",
errors: str = "strict",
**kwargs) -> typing.Type['String']:
"""Creates the appropriate class and returns it so that the native type is inherited
The only reason the **kwargs is added, is so that the inherriting types can override __init__
@@ -140,7 +175,7 @@ class String(PrimitiveObject, str):
if errors:
params['errors'] = errors
# Pass the encoding and error parameters to the string constructor to appropriately encode the string
value = cls._struct_type.__new__(cls,
value = cls._struct_type.__new__(cls, # type: ignore
cls._struct_value(context,
struct_format = str(max_length) + "s",
layer_name = object_info.layer_name,
@@ -154,7 +189,12 @@ class String(PrimitiveObject, str):
class Pointer(Integer):
"""Pointer which points to another object"""
def __init__(self, context, type_name, object_info, struct_format, subtype = None):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
struct_format: str,
subtype: typing.Optional[templates.ObjectTemplate] = None) -> None:
self._check_type(subtype, templates.ObjectTemplate)
super().__init__(context = context,
object_info = object_info,
@@ -163,7 +203,11 @@ class Pointer(Integer):
self._vol['subtype'] = subtype
@classmethod
def _struct_value(cls, context, struct_format, layer_name, offset):
def _struct_value(cls,
context: interfaces.context.ContextInterface,
struct_format: str,
layer_name: str,
offset: int) -> typing.Any:
"""Ensure that pointer values always fall within the address space of the layer they're constructed on
If there's a need for all the data within the address, the pointer should be recast. The "pointer"
@@ -175,7 +219,7 @@ class Pointer(Integer):
(value,) = struct.unpack(struct_format, data)
return value & mask
def dereference(self, layer_name = None):
def dereference(self, layer_name: typing.Optional[str] = None) -> interfaces.objects.ObjectInterface:
"""Dereferences the pointer
Layer_name is identifies the appropriate layer within the context that the pointer points to.
@@ -191,24 +235,27 @@ class Pointer(Integer):
offset = offset,
parent = self))
def __getattr__(self, attr):
def __getattr__(self, attr: str) -> typing.Any:
"""Convenience function to access unknown attributes by getting them from the subtype object"""
return getattr(self.dereference(), attr)
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
return Integer.VolTemplateProxy.size(template)
@classmethod
def children(cls, template):
def children(cls, template: interfaces.objects.Template) -> typing.List[interfaces.objects.Template]:
"""Returns the children of the template"""
if 'subtype' in template.vol:
return [template.vol.subtype]
return []
@classmethod
def replace_child(cls, template, old_child, new_child):
def replace_child(cls,
template: interfaces.objects.Template,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Substitutes the old_child for the new_child"""
if 'subtype' in template.vol:
if template.vol.subtype == old_child:
@@ -218,36 +265,51 @@ class Pointer(Integer):
class BitField(interfaces.objects.ObjectInterface, int):
"""Object containing a field which is made up of bits rather than whole bytes"""
def __new__(cls, context, type_name, object_info, base_type = None, start_bit = 0, end_bit = 0,
**kwargs):
cls._check_class(base_type.vol.object_class, Integer)
value = base_type(context = context,
object_info = object_info)
return int.__new__(cls, (value >> start_bit) & ((1 << end_bit) - 1))
def __init__(self, context, type_name, object_info, base_type = None, start_bit = 0, end_bit = 0):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
base_type: typing.Type = int,
start_bit: int = 0,
end_bit: int = 0) -> None:
super().__init__(context, type_name, object_info)
self._vol['base_type'] = base_type
self._vol['start_bit'] = start_bit
self._vol['end_bit'] = end_bit
def __new__(cls,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
base_type: typing.Type = int,
start_bit: int = 0,
end_bit: int = 0,
**kwargs) -> typing.Type:
cls._check_class(base_type.vol.object_class, Integer)
value = base_type(context = context,
object_info = object_info)
return int.__new__(cls, (value >> start_bit) & ((1 << end_bit) - 1)) # type: ignore
def write(self, value):
raise NotImplementedError("Writing to BitFields is not yet implemented")
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
return Integer.VolTemplateProxy.size(template)
@classmethod
def children(cls, template):
def children(cls, template: interfaces.objects.Template) -> typing.List[interfaces.objects.Template]:
"""Returns the children of the template"""
if 'base_type' in template.vol:
return [template.vol.base_type]
return []
@classmethod
def replace_child(cls, template, old_child, new_child):
def replace_child(cls,
template: interfaces.objects.Template,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Substitutes the old_child for the new_child"""
if 'base_type' in template.vol:
if template.vol.base_type == old_child:
@@ -257,16 +319,27 @@ class BitField(interfaces.objects.ObjectInterface, int):
class Enumeration(interfaces.objects.ObjectInterface, int):
"""Returns an object made up of choices"""
def __new__(cls, context, type_name, object_info, base_type = None, choices = None, **kwargs):
def __new__(cls,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
base_type: interfaces.objects.Template = None,
choices: typing.Dict[str, int] = None,
**kwargs) -> typing.Type:
cls._check_class(base_type.vol.object_class, Integer)
value = base_type(context = context,
object_info = object_info)
return int.__new__(cls, value)
return int.__new__(cls, value) # type: ignore
def __init__(self, context, type_name, object_info, base_type = None, choices = None):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
base_type: typing.Optional[Integer] = None,
choices: typing.Optional[typing.Dict[str, int]] = None) -> None:
super().__init__(context, type_name, object_info)
self._inverse_choices = {}
self._inverse_choices = {} # type: typing.Dict[int, str]
for k, v in self._check_type(choices, dict).items():
self._check_type(k, str)
self._check_type(v, int)
@@ -280,44 +353,47 @@ class Enumeration(interfaces.objects.ObjectInterface, int):
self._vol['base_type'] = base_type
def lookup(self, value):
def lookup(self, value: int) -> str:
"""Looks up an individual value and returns the associated name"""
if value in self._inverse_choices:
return self._inverse_choices[value]
raise ValueError("The value of the enumeration is outside the possible choices")
@property
def description(self):
def description(self) -> str:
"""Returns the chosen name for the value this object contains"""
return self.lookup(self)
@property
def choices(self):
def choices(self) -> typing.Dict[str, int]:
return self._vol['choices']
def __getattr__(self, attr):
def __getattr__(self, attr: str) -> str:
"""Returns the value for a specific name"""
if attr in self._vol['choices']:
return self._vol['choices'][attr]
raise AttributeError("Unknown attribute {} for Enumeration {}".format(attr, self._vol['type_name']))
def write(self, value):
def write(self, value: bytes):
raise NotImplementedError("Writing to Enumerations is not yet implemented")
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
return template._vol['base_type'].size
@classmethod
def children(cls, template):
def children(cls, template: interfaces.objects.Template) -> typing.List[interfaces.objects.Template]:
"""Returns the children of the template"""
if 'base_type' in template.vol:
return [template.vol.base_type]
return []
@classmethod
def replace_child(cls, template, old_child, new_child):
def replace_child(cls,
template: interfaces.objects.Template,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Substitutes the old_child for the new_child"""
if 'base_type' in template.vol:
if template.vol.base_type == old_child:
@@ -327,7 +403,12 @@ class Enumeration(interfaces.objects.ObjectInterface, int):
class Array(interfaces.objects.ObjectInterface, abc.Sequence):
"""Object which can contain a fixed number of an object type"""
def __init__(self, context, type_name, object_info, count = 0, subtype = None):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
count: int = 0,
subtype: templates.ObjectTemplate = None) -> None:
self._check_type(subtype, templates.ObjectTemplate)
super().__init__(context = context,
type_name = type_name,
@@ -338,47 +419,53 @@ class Array(interfaces.objects.ObjectInterface, abc.Sequence):
# This overrides the little known Sequence.count(val) that returns the number of items in the list that match val
# Changing the name would be confusing (since we use count of an array everywhere else), so this is more important
@property
def count(self):
def count(self) -> int:
"""Returns the count dynamically"""
return self.vol.count
@count.setter
def count(self, value):
def count(self, value: int) -> None:
"""Sets the count to a specific value"""
self._vol['count'] = self._check_type(value, int)
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
"""Returns the size of the array, based on the count and the subtype"""
if 'subtype' not in template.vol and 'count' not in template.vol:
raise TypeError("Array ObjectTemplate must be provided a count and subtype")
return template.vol.get('subtype', None).size * template.vol.get('count', 0)
@classmethod
def children(cls, template):
def children(cls, template: interfaces.objects.Template) -> typing.List[interfaces.objects.Template]:
"""Returns the children of the template"""
if 'subtype' in template.vol:
return [template.vol.subtype]
return []
@classmethod
def replace_child(cls, template, old_child, new_child):
def replace_child(cls,
template: interfaces.objects.Template,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Substitutes the old_child for the new_child"""
if 'subtype' in template.vol:
if template.vol['subtype'] == old_child:
template.update_vol(subtype = new_child)
@classmethod
def relative_child_offset(cls, template, child):
def relative_child_offset(cls,
template: interfaces.objects.Template,
child: interfaces.objects.Template) -> int:
"""Returns the relative offset from the head of the parent data to the child member"""
if 'subtype' in template and child == 'subtype':
return 0
raise IndexError("Member not present in array template: {}".format(child))
def __getitem__(self, i):
def __getitem__(self, i: typing.Union[int, slice]) \
-> typing.Union[typing.List[interfaces.objects.Template], interfaces.objects.Template]:
"""Returns the i-th item from the array"""
result = []
result = [] # type: typing.List[interfaces.objects.Template]
mask = self._context.memory[self.vol.layer_name].address_mask
# We use the range function to deal with slices for us
series = range(self.vol.count)[i]
@@ -395,11 +482,11 @@ class Array(interfaces.objects.ObjectInterface, abc.Sequence):
return result[0]
return result
def __len__(self):
def __len__(self) -> int:
"""Returns the length of the array"""
return self.vol.count
def write(self, value):
def write(self, value) -> None:
raise NotImplementedError("Writing to Arrays is not yet implemented")
@@ -409,30 +496,38 @@ class Struct(interfaces.objects.ObjectInterface):
Keep the number of methods in this class low or very specific, since each one could overload a valid member.
"""
def __init__(self, context, type_name, object_info, size, members):
def __init__(self,
context: interfaces.context.ContextInterface,
type_name: str,
object_info: interfaces.objects.ObjectInformation,
size: int,
members: typing.Dict[str, typing.Tuple[int, interfaces.objects.Template]]) -> None:
super().__init__(context = context,
type_name = type_name,
object_info = object_info,
size = size,
members = members)
self._check_members(members)
self._concrete_members = {}
self._concrete_members = {} # type: typing.Dict[str, typing.Dict]
class VolTemplateProxy(interfaces.objects.ObjectInterface.VolTemplateProxy):
@classmethod
def size(cls, template):
def size(cls, template: interfaces.objects.Template) -> int:
"""Method to return the size of this type"""
if template.vol.get('size', None) is None:
raise TypeError("Struct ObjectTemplate not provided with a size")
return template.vol.size
@classmethod
def children(cls, template):
def children(cls, template: interfaces.objects.Template) -> typing.List[interfaces.objects.Template]:
"""Method to list children of a template"""
return [member for _, member in template.vol.members.values()]
@classmethod
def replace_child(cls, template, old_child, new_child):
def replace_child(cls,
template: interfaces.objects.Template,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Replace a child elements within the arguments handed to the template"""
for member in template.vol.members.get('members', {}):
relative_offset, member_template = template.vol.members[member]
@@ -447,7 +542,9 @@ class Struct(interfaces.objects.ObjectInterface):
template.update_vol(members = tmp_list)
@classmethod
def relative_child_offset(cls, template, child):
def relative_child_offset(cls,
template: interfaces.objects.Template,
child: interfaces.objects.Template) -> int:
"""Returns the relative offset of a child to its parent"""
retlist = template.vol.members.get(child, None)
if retlist is None:
@@ -455,7 +552,8 @@ class Struct(interfaces.objects.ObjectInterface):
return retlist[0]
@classmethod
def _check_members(cls, members):
def _check_members(cls,
members: typing.Dict[str, typing.Tuple[int, interfaces.objects.Template]]) -> None:
# Members should be an iterable mapping of symbol names to tuples of (relative_offset, ObjectTemplate)
# An object template is a callable that when called with a context, offset, layer_name and type_name
if not isinstance(members, abc.Mapping):
@@ -463,11 +561,11 @@ class Struct(interfaces.objects.ObjectInterface):
if not all([(isinstance(member, tuple) and len(member) == 2) for member in members.values()]):
raise TypeError("Struct members must be a tuple of relative_offsets and templates")
def member(self, attr = 'member'):
def member(self, attr: str = 'member') -> object:
"""Specifically named method for retrieving members."""
return self.__getattr__(attr)
def __getattribute__(self, attr):
def __getattribute__(self, attr: str) -> typing.Any:
"""Make sure that class overrides all start with helper_"""
if attr == '__dict__' or attr == '__class__' or attr in self.__dict__:
return object.__getattribute__(self, attr)
@@ -484,7 +582,7 @@ class Struct(interfaces.objects.ObjectInterface):
# Change this to an attribute error if we want to prohibit rather than deprecate member collisisons
return object.__getattribute__(self, attr)
def __getattr__(self, attr):
def __getattr__(self, attr: str) -> typing.Any:
"""Method for accessing members of the type"""
if attr in self._concrete_members:
return self._concrete_members[attr]
+18 -9
View File
@@ -17,38 +17,45 @@ class ObjectTemplate(interfaces.objects.Template, validity.ValidityRoutines):
* etc
"""
def __init__(self, object_class = None, type_name = None, **arguments):
def __init__(self,
object_class: typing.Optional[typing.Type[interfaces.objects.ObjectInterface]] = None,
type_name: str = None,
**arguments) -> None:
super().__init__(type_name = type_name, **arguments)
self._check_class(object_class, interfaces.objects.ObjectInterface)
self._arguments['object_class'] = object_class
@property
def size(self):
def size(self) -> int:
"""Returns the children of the templated object (see :class:`~volatility.framework.interfaces.objects.ObjectInterface.VolTemplateProxy`)"""
return self.vol.object_class.VolTemplateProxy.size(self)
@property
def children(self):
def children(self) -> typing.List[interfaces.objects.Template]:
"""Returns the children of the templated object (see :class:`~volatility.framework.interfaces.objects.ObjectInterface.VolTemplateProxy`)
"""
return self.vol.object_class.VolTemplateProxy.children(self)
def relative_child_offset(self, child):
def relative_child_offset(self, child: interfaces.objects.Template) -> int:
"""Returns the relative offset of a child of the templated object (see :class:`~volatility.framework.interfaces.objects.ObjectInterface.VolTemplateProxy`)
"""
return self.vol.object_class.VolTemplateProxy.relative_child_offset(self, child)
def replace_child(self, old_child, new_child):
def replace_child(self,
old_child: interfaces.objects.Template,
new_child: interfaces.objects.Template) -> None:
"""Replaces `old_child` for `new_child` in the templated object's child list (see :class:`~volatility.framework.interfaces.objects.ObjectInterface.VolTemplateProxy`)
"""
return self.vol.object_class.VolTemplateProxy.replace_child(self, old_child, new_child)
def __call__(self, context, object_info):
def __call__(self,
context: interfaces.context.ContextInterface,
object_info: interfaces.objects.ObjectInformation) -> interfaces.objects.ObjectInterface:
"""Constructs the object
Returns: an object adhereing to the :class:`~volatility.framework.interfaces.objects.ObjectInterface`
"""
arguments = {}
arguments = {} # type: typing.Dict[str, typing.Any]
arguments.update(self.vol)
del arguments['object_class']
return self.vol.object_class(context = context,
@@ -64,7 +71,7 @@ class ReferenceTemplate(interfaces.objects.Template):
"""
@property
def children(self):
def children(self) -> typing.List[interfaces.objects.Template]:
return []
def _unresolved(self, *args, **kwargs) -> typing.Any:
@@ -78,6 +85,8 @@ class ReferenceTemplate(interfaces.objects.Template):
replace_child = _unresolved # type: typing.ClassVar[typing.Any]
relative_child_offset = _unresolved # type: typing.ClassVar[typing.Any]
def __call__(self, context, object_info):
def __call__(self,
context: interfaces.context.ContextInterface,
object_info: interfaces.objects.ObjectInformation):
template = context.symbol_space.get_type(self.vol.type_name)
return template(context = context, object_info = object_info)
+13 -4
View File
@@ -1,8 +1,12 @@
from volatility.framework import objects
import typing
from volatility.framework import objects, interfaces
from volatility.framework.objects import templates
def array_to_string(array, count = None, errors = 'replace'):
def array_to_string(array: objects.Array,
count: typing.Optional[int] = None,
errors: str = 'replace') -> interfaces.objects.ObjectInterface:
"""Takes a volatility Array of characters and returns a string"""
# TODO: Consider checking the Array's target is a native char
if count is None:
@@ -12,7 +16,9 @@ def array_to_string(array, count = None, errors = 'replace'):
return array.cast("string", max_length = count, errors = errors)
def pointer_to_string(pointer, count, errors = 'replace'):
def pointer_to_string(pointer: objects.Pointer,
count: int,
errors: str = 'replace'):
"""Takes a volatility Pointer to characters and returns a string"""
if not isinstance(pointer, objects.Pointer):
raise TypeError("pointer_to_string takes a Pointer")
@@ -22,7 +28,10 @@ def pointer_to_string(pointer, count, errors = 'replace'):
return char.cast("string", max_length = count, errors = errors)
def array_of_pointers(array, count, subtype = None, context = None):
def array_of_pointers(array: objects.Array,
count: int,
subtype: templates.ObjectTemplate = None,
context: interfaces.context.ContextInterface = None) -> interfaces.objects.ObjectInterface:
"""Takes an object, and recasts it as an array of pointers to subtype"""
if isinstance(subtype, str) and context is not None:
subtype = context.symbol_space.get_type(subtype)