transforms/inline: rewrite

artiq/transforms/inline.py

@@ -1,17 +1,357 @@
-from collections import namedtuple
-from fractions import Fraction
 import inspect
 import textwrap
 import ast
+import types
 import builtins
-from copy import deepcopy
+from fractions import Fraction
+from collections import OrderedDict
 
-from artiq.transforms.tools import eval_ast, value_to_ast, NotASTRepresentable
 from artiq.language import core as core_language
 from artiq.language import units
+from artiq.transforms.tools import value_to_ast, NotASTRepresentable
 
 
-class _HostObjectMapper:
+def new_mangled_name(in_use_names, name):
+    mangled_name = name
+    i = 2
+    while mangled_name in in_use_names:
+        mangled_name = name + str(i)
+        i += 1
+    in_use_names.add(mangled_name)
+    return mangled_name
+
+
+class MangledName:
+    def __init__(self, s):
+        self.s = s
+
+
+class AttributeInfo:
+    def __init__(self, obj, mangled_name, read_write):
+        self.obj = obj
+        self.mangled_name = mangled_name
+        self.read_write = read_write
+
+
+embeddable_funcs = (
+    core_language.delay, core_language.at, core_language.now,
+    core_language.time_to_cycles, core_language.cycles_to_time,
+    core_language.syscall,
+    range, bool, int, float, round,
+    core_language.int64, core_language.round64, core_language.array,
+    Fraction, units.Quantity, core_language.EncodedException
+)
+
+
+def is_embeddable(func):
+    for ef in embeddable_funcs:
+        if func is ef:
+            return True
+    return False
+
+
+def is_inlinable(core, func):
+    if hasattr(func, "k_function_info"):
+        if func.k_function_info.core_name == "":
+            return True  # portable function
+        if getattr(func.__self__, func.k_function_info.core_name) is core:
+            return True  # kernel function for the same core device
+    return False
+
+
+class GlobalNamespace:
+    def __init__(self, func):
+        self.func_gd = inspect.getmodule(func).__dict__
+
+    def __getitem__(self, item):
+        try:
+            return self.func_gd[item]
+        except KeyError:
+            return getattr(builtins, item)
+
+
+def get_inline(core, attribute_namespace, in_use_names, retval_name, mappers,
+               func, args):
+    global_namespace = GlobalNamespace(func)
+    func_tr = Function(core,
+                       global_namespace, attribute_namespace, in_use_names,
+                       retval_name, mappers)
+    func_def = ast.parse(textwrap.dedent(inspect.getsource(func))).body[0]
+
+    param_init = []
+    # initialize arguments
+    for arg_ast, arg_value in zip(func_def.args.args, args):
+        if isinstance(arg_value, ast.AST):
+            value = arg_value
+        else:
+            try:
+                value = ast.copy_location(value_to_ast(arg_value), func_def)
+            except NotASTRepresentable:
+                value = None
+        if value is None:
+            # static object
+            func_tr.local_namespace[arg_ast.arg] = arg_value
+        else:
+            # set parameter value with "name = value"
+            # assignment at beginning of function
+            new_name = new_mangled_name(in_use_names, arg_ast.arg)
+            func_tr.local_namespace[arg_ast.arg] = MangledName(new_name)
+            target = ast.copy_location(ast.Name(new_name, ast.Store()),
+                                       func_def)
+            assign = ast.copy_location(ast.Assign([target], value),
+                                       func_def)
+            param_init.append(assign)
+
+    func_def = func_tr.code_visit(func_def)
+    func_def.body[0:0] = param_init
+    return func_def
+
+
+class Function:
+    def __init__(self, core,
+                 global_namespace, attribute_namespace, in_use_names,
+                 retval_name, mappers):
+        # The core device on which this function is executing.
+        self.core = core
+
+        # Local and global namespaces:
+        # original name -> MangledName or static object
+        self.local_namespace = dict()
+        self.global_namespace = global_namespace
+
+        # (id(static object), attribute) -> AttributeInfo
+        self.attribute_namespace = attribute_namespace
+
+        # All names currently in use, in the namespace of the combined
+        # function.
+        # When creating a name for a new object, check that it is not
+        # already in this set.
+        self.in_use_names = in_use_names
+
+        # Name of the variable to store the return value to, or None
+        # to keep the return statement.
+        self.retval_name = retval_name
+
+        # Host object mappers, for RPC and exception numbers
+        self.mappers = mappers
+
+        self._insertion_point = None
+
+    # This is ast.NodeVisitor/NodeTransformer from CPython, modified
+    # to add code_ prefix.
+    def code_visit(self, node):
+        method = "code_visit_" + node.__class__.__name__
+        visitor = getattr(self, method, self.code_generic_visit)
+        return visitor(node)
+
+    # This is ast.NodeTransformer.generic_visit from CPython, modified
+    # to update self._insertion_point.
+    def code_generic_visit(self, node):
+        for field, old_value in ast.iter_fields(node):
+            old_value = getattr(node, field, None)
+            if isinstance(old_value, list):
+                prev_insertion_point = self._insertion_point
+                new_values = []
+                if field in ("body", "orelse", "finalbody"):
+                    self._insertion_point = new_values
+                for value in old_value:
+                    if isinstance(value, ast.AST):
+                        value = self.code_visit(value)
+                        if value is None:
+                            continue
+                        elif not isinstance(value, ast.AST):
+                            new_values.extend(value)
+                            continue
+                    new_values.append(value)
+                old_value[:] = new_values
+                self._insertion_point = prev_insertion_point
+            elif isinstance(old_value, ast.AST):
+                new_node = self.code_visit(old_value)
+                if new_node is None:
+                    delattr(node, field)
+                else:
+                    setattr(node, field, new_node)
+        return node
+
+    def code_visit_Name(self, node):
+        if isinstance(node.ctx, ast.Store):
+            if (node.id in self.local_namespace
+                    and isinstance(self.local_namespace[node.id],
+                                   MangledName)):
+                new_name = self.local_namespace[node.id].s
+            else:
+                new_name = new_mangled_name(self.in_use_names, node.id)
+                self.local_namespace[node.id] = MangledName(new_name)
+            node.id = new_name
+            return node
+        else:
+            try:
+                obj = self.local_namespace[node.id]
+            except KeyError:
+                try:
+                    obj = self.global_namespace[node.id]
+                except KeyError:
+                    raise NameError("name '{}' is not defined".format(node.id))
+            if isinstance(obj, MangledName):
+                node.id = obj.s
+                return node
+            else:
+                try:
+                    return value_to_ast(obj)
+                except NotASTRepresentable:
+                    raise NotImplementedError(
+                        "Static object cannot be used here")
+
+    def code_visit_Attribute(self, node):
+        # There are two cases of attributes:
+        # 1. static object attributes, e.g. self.foo
+        # 2. dynamic expression attributes, e.g.
+        #    (Fraction(1, 2) + x).numerator
+        # Static object resolution has no side effects so we try it first.
+        try:
+            obj = self.static_visit(node.value)
+        except:
+            self.code_generic_visit(node)
+            return node
+        else:
+            key = (id(obj), node.attr)
+            try:
+                attr_info = self.attribute_namespace[key]
+            except KeyError:
+                new_name = new_mangled_name(self.in_use_names, node.attr)
+                attr_info = AttributeInfo(obj, new_name, False)
+                self.attribute_namespace[key] = attr_info
+            if isinstance(node.ctx, ast.Store):
+                attr_info.read_write = True
+            return ast.copy_location(
+                ast.Name(attr_info.mangled_name, node.ctx),
+                node)
+
+    def code_visit_Call(self, node):
+        func = self.static_visit(node.func)
+        node.args = [self.code_visit(arg) for arg in node.args]
+
+        if is_embeddable(func):
+            node.func = ast.copy_location(
+                ast.Name(func.__name__, ast.Load()),
+                node)
+            return node
+        elif is_inlinable(self.core, func):
+            retval_name = func.k_function_info.k_function.__name__ + "_return"
+            retval_name_m = new_mangled_name(self.in_use_names, retval_name)
+            args = [func.__self__] + node.args
+            inlined = get_inline(self.core,
+                                 self.attribute_namespace, self.in_use_names,
+                                 retval_name_m, self.mappers,
+                                 func.k_function_info.k_function, args)
+            seq = ast.copy_location(
+                ast.With(
+                    items=[ast.withitem(context_expr=ast.Name(id="sequential",
+                                                              ctx=ast.Load()),
+                                        optional_vars=None)],
+                    body=inlined.body),
+                node)
+            self._insertion_point.append(seq)
+            return ast.copy_location(ast.Name(retval_name_m, ast.Load()),
+                                     node)
+        else:
+            arg1 = ast.copy_location(ast.Str("rpc"), node)
+            arg2 = ast.copy_location(
+                value_to_ast(self.mappers.rpc.encode(func)), node)
+            node.args[0:0] = [arg1, arg2]
+            node.func = ast.copy_location(
+                ast.Name("syscall", ast.Load()), node)
+            return node
+
+    def code_visit_Return(self, node):
+        self.code_generic_visit(node)
+        if self.retval_name is None:
+            return node
+        else:
+            return ast.copy_location(
+                ast.Assign(targets=[ast.Name(self.retval_name, ast.Store())],
+                           value=node.value),
+                node)
+
+    def code_visit_Expr(self, node):
+        if isinstance(node.value, ast.Str):
+            # Strip docstrings. This also removes strings appearing in the
+            # middle of the code, but they are nops.
+            return None
+        self.code_generic_visit(node)
+        if isinstance(node.value, ast.Name):
+            # Remove Expr nodes that contain only a name, likely due to
+            # function call inlining. Such nodes that were originally in the
+            # code are also removed, but this does not affect the semantics of
+            # the code as they are nops.
+            return None
+        else:
+            return node
+
+    def encode_exception(self, e):
+        exception_class = self.static_visit(e)
+        if not inspect.isclass(exception_class):
+            raise NotImplementedError("Exception type must be a class")
+        if issubclass(exception_class, core_language.RuntimeException):
+            exception_id = exception_class.eid
+        else:
+            exception_id = self.mappers.exception.encode(exception_class)
+        return ast.copy_location(
+            ast.Call(func=ast.Name("EncodedException", ast.Load()),
+                     args=[value_to_ast(exception_id)],
+                     keywords=[], starargs=None, kwargs=None),
+            e)
+
+    def code_visit_Raise(self, node):
+        if node.cause is not None:
+            raise NotImplementedError("Exception causes are not supported")
+        if node.exc is not None:
+            node.exc = self.encode_exception(node.exc)
+        return node
+
+    def code_visit_ExceptHandler(self, node):
+        if node.name is not None:
+            raise NotImplementedError("'as target' is not supported")
+        if node.type is not None:
+            if isinstance(node.type, ast.Tuple):
+                node.type.elts = [self.encode_exception(e)
+                                  for e in node.type.elts]
+            else:
+                node.type = self.encode_exception(node.type)
+        self.code_generic_visit(node)
+        return node
+
+    def code_visit_FunctionDef(self, node):
+        node.args = ast.arguments(args=[], vararg=None, kwonlyargs=[],
+                                  kw_defaults=[], kwarg=None, defaults=[])
+        node.decorator_list = []
+        self.code_generic_visit(node)
+        return node
+
+    def static_visit(self, node):
+        method = "static_visit_" + node.__class__.__name__
+        visitor = getattr(self, method)
+        return visitor(node)
+
+    def static_visit_Name(self, node):
+        try:
+            obj = self.local_namespace[node.id]
+        except KeyError:
+            try:
+                obj = self.global_namespace[node.id]
+            except KeyError:
+                raise NameError("name '{}' is not defined".format(node.id))
+        if isinstance(obj, MangledName):
+            raise NotImplementedError(
+                "Only a static object can be used here")
+        return obj
+
+    def static_visit_Attribute(self, node):
+        value = self.static_visit(node.value)
+        return getattr(value, node.attr)
+
+
+class HostObjectMapper:
     def __init__(self, first_encoding=0):
         self._next_encoding = first_encoding
         # id(object) -> (encoding, object)
@@ -31,334 +371,37 @@ class _HostObjectMapper:
         return {encoding: obj for i, (encoding, obj) in self._d.items()}
 
 
-_UserVariable = namedtuple("_UserVariable", "name")
+def inline(core, k_function, k_args, k_kwargs):
-
+    if k_kwargs:
-
-def _is_kernel_attr(value, attr):
-    return hasattr(value, "kernel_attr") and attr in value.kernel_attr.split()
-
-
-class _ReferenceManager:
-    def __init__(self):
-        self.rpc_mapper = _HostObjectMapper()
-        self.exception_mapper = _HostObjectMapper(core_language.first_user_eid)
-        self.kernel_attr_init = []
-
-        # (id(obj), func_name, ref_name) or (id(obj), kernel_attr_name)
-        #     -> _UserVariable(name) / complex object
-        self._to_inlined = dict()
-        # inlined_name -> use_count
-        self._use_count = dict()
-        # reserved names
-        for kg in core_language.kernel_globals:
-            self._use_count[kg] = 1
-        for name in ("bool", "int", "round", "int64", "round64", "float",
-                     "Fraction", "array", "Quantity", "EncodedException",
-                     "range"):
-            self._use_count[name] = 1
-
-    # Complex objects in the namespace of functions can be used in two ways:
-    # 1. Calling a method on them (which gets inlined or RPCd)
-    # 2. Getting or setting attributes (which are turned into local variables)
-    # They are needed to implement "self", which is the only supported use
-    # case.
-    def register_complex_object(self, obj, func_name, ref_name,
-                                complex_object):
-        assert(not isinstance(complex_object, ast.AST))
-        self._to_inlined[(id(obj), func_name, ref_name)] = complex_object
-
-    def new_name(self, base_name):
-        if base_name[-1].isdigit():
-            base_name += "_"
-        if base_name in self._use_count:
-            r = base_name + str(self._use_count[base_name])
-            self._use_count[base_name] += 1
-            return r
-        else:
-            self._use_count[base_name] = 1
-            return base_name
-
-    def resolve_name(self, obj, func_name, ref_name, store):
-        key = (id(obj), func_name, ref_name)
-        try:
-            return self._to_inlined[key]
-        except KeyError:
-            if store:
-                ival = _UserVariable(self.new_name(ref_name))
-                self._to_inlined[key] = ival
-                return ival
-            else:
-                try:
-                    return inspect.getmodule(obj).__dict__[ref_name]
-                except KeyError:
-                    return getattr(builtins, ref_name)
-
-    def resolve_attr(self, value, attr):
-        if _is_kernel_attr(value, attr):
-            key = (id(value), attr)
-            try:
-                ival = self._to_inlined[key]
-                assert(isinstance(ival, _UserVariable))
-            except KeyError:
-                iname = self.new_name(attr)
-                ival = _UserVariable(iname)
-                self._to_inlined[key] = ival
-                a = value_to_ast(getattr(value, attr))
-                if a is None:
         raise NotImplementedError(
-                        "Cannot represent initial value"
+            "Keyword arguments are not supported for kernels")
-                        " of kernel attribute")
-                self.kernel_attr_init.append(ast.Assign(
-                    [ast.Name(iname, ast.Store())], a))
-            return ival
-        else:
-            return getattr(value, attr)
 
-    def resolve_constant(self, obj, func_name, node):
+    # OrderedDict prevents non-determinism in parameter init
-        if isinstance(node, ast.Name):
+    attribute_namespace = OrderedDict()
-            c = self.resolve_name(obj, func_name, node.id, False)
+    in_use_names = {func.__name__ for func in embeddable_funcs}
-            if isinstance(c, _UserVariable):
+    mappers = types.SimpleNamespace(
-                raise ValueError("Not a constant")
+        rpc=HostObjectMapper(),
-            return c
+        exception=HostObjectMapper(core_language.first_user_eid)
-        elif isinstance(node, ast.Attribute):
-            value = self.resolve_constant(obj, func_name, node.value)
-            if _is_kernel_attr(value, node.attr):
-                raise ValueError("Not a constant")
-            return getattr(value, node.attr)
-        else:
-            raise NotImplementedError
-
-
-_embeddable_funcs = (
-    core_language.delay, core_language.at, core_language.now,
-    core_language.time_to_cycles, core_language.cycles_to_time,
-    core_language.syscall,
-    range, bool, int, float, round,
-    core_language.int64, core_language.round64, core_language.array,
-    Fraction, units.Quantity, core_language.EncodedException
     )
+    func_def = get_inline(
+        core=core,
+        attribute_namespace=attribute_namespace,
+        in_use_names=in_use_names,
+        retval_name=None,
+        mappers=mappers,
+        func=k_function,
+        args=k_args)
 
-def _is_embeddable(func):
-    for ef in _embeddable_funcs:
-        if func is ef:
-            return True
-    return False
-
-
-def _is_inlinable(core, func):
-    if hasattr(func, "k_function_info"):
-        if func.k_function_info.core_name == "":
-            return True  # portable function
-        if getattr(func.__self__, func.k_function_info.core_name) is core:
-            return True  # kernel function for the same core device
-    return False
-
-
-class _ReferenceReplacer(ast.NodeVisitor):
-    def __init__(self, core, rm, obj, func_name, retval_name):
-        self.core = core
-        self.rm = rm
-        self.obj = obj
-        self.func_name = func_name
-        self.retval_name = retval_name
-        self._insertion_point = None
-
-    # This is ast.NodeTransformer.generic_visit from CPython, modified
-    # to update self._insertion_point.
-    def generic_visit(self, node):
-        for field, old_value in ast.iter_fields(node):
-            old_value = getattr(node, field, None)
-            if isinstance(old_value, list):
-                prev_insertion_point = self._insertion_point
-                new_values = []
-                if field in ("body", "orelse", "finalbody"):
-                    self._insertion_point = new_values
-                for value in old_value:
-                    if isinstance(value, ast.AST):
-                        value = self.visit(value)
-                        if value is None:
-                            continue
-                        elif not isinstance(value, ast.AST):
-                            new_values.extend(value)
-                            continue
-                    new_values.append(value)
-                old_value[:] = new_values
-                self._insertion_point = prev_insertion_point
-            elif isinstance(old_value, ast.AST):
-                new_node = self.visit(old_value)
-                if new_node is None:
-                    delattr(node, field)
-                else:
-                    setattr(node, field, new_node)
-        return node
-
-    def visit_Name(self, node):
-        store = isinstance(node.ctx, ast.Store)
-        ival = self.rm.resolve_name(self.obj, self.func_name, node.id, store)
-        if isinstance(ival, _UserVariable):
-            newnode = ast.Name(ival.name, node.ctx)
-        else:
-            if store:
-                raise NotImplementedError("Cannot assign to this object")
-            newnode = value_to_ast(ival)
-        return ast.copy_location(newnode, node)
-
-    def _resolve_attribute(self, node):
-        if isinstance(node, ast.Name):
-            ival = self.rm.resolve_name(self.obj, self.func_name, node.id, False)
-            if isinstance(ival, _UserVariable):
-                return ast.Name(ival.name, ast.Load())
-            else:
-                return ival
-        elif isinstance(node, ast.Attribute):
-            value = self._resolve_attribute(node.value)
-            if isinstance(value, ast.AST):
-                node.value = value
-                return node
-            else:
-                return self.rm.resolve_attr(value, node.attr)
-        else:
-            return self.visit(node)
-
-    def visit_Attribute(self, node):
-        ival = self._resolve_attribute(node)
-        if isinstance(ival, ast.AST):
-            newnode = deepcopy(ival)
-        elif isinstance(ival, _UserVariable):
-            newnode = ast.Name(ival.name, node.ctx)
-        else:
-            newnode = value_to_ast(ival)
-        return ast.copy_location(newnode, node)
-
-    def visit_Call(self, node):
-        func = self.rm.resolve_constant(self.obj, self.func_name, node.func)
-        new_args = [self.visit(arg) for arg in node.args]
-
-        if _is_embeddable(func):
-            new_func = ast.Name(func.__name__, ast.Load())
-            return ast.copy_location(
-                ast.Call(func=new_func, args=new_args,
-                         keywords=[], starargs=None, kwargs=None),
-                node)
-        elif _is_inlinable(self.core, func):
-            retval_name = self.rm.new_name(
-                func.k_function_info.k_function.__name__ + "_return")
-            args = [func.__self__] + new_args
-            inlined, _, _ = inline(self.core, func.k_function_info.k_function,
-                                   args, dict(), self.rm, retval_name)
-            self._insertion_point.append(ast.With(
-                items=[ast.withitem(context_expr=ast.Name(id="sequential",
-                                                          ctx=ast.Load()),
-                                    optional_vars=None)],
-                body=inlined.body))
-            return ast.copy_location(ast.Name(retval_name, ast.Load()), node)
-        else:
-            args = [ast.Str("rpc"), value_to_ast(self.rm.rpc_mapper.encode(func))]
-            args += new_args
-            return ast.copy_location(
-                ast.Call(func=ast.Name("syscall", ast.Load()),
-                         args=args, keywords=[], starargs=None, kwargs=None),
-                node)
-
-    def visit_Return(self, node):
-        self.generic_visit(node)
-        return ast.copy_location(
-            ast.Assign(targets=[ast.Name(self.retval_name, ast.Store())],
-                       value=node.value),
-            node)
-
-    def visit_Expr(self, node):
-        if isinstance(node.value, ast.Str):
-            # Strip docstrings. This also removes strings appearing in the
-            # middle of the code, but they are nops.
-            return None
-        self.generic_visit(node)
-        if isinstance(node.value, ast.Name):
-            # Remove Expr nodes that contain only a name, likely due to
-            # function call inlining. Such nodes that were originally in the
-            # code are also removed, but this does not affect the semantics of
-            # the code as they are nops.
-            return None
-        else:
-            return node
-
-    def visit_FunctionDef(self, node):
-        node.args = ast.arguments(args=[], vararg=None, kwonlyargs=[],
-                                  kw_defaults=[], kwarg=None, defaults=[])
-        node.decorator_list = []
-        self.generic_visit(node)
-        return node
-
-    def _encode_exception(self, e):
-        exception_class = self.rm.resolve_constant(self.obj, self.func_name, e)
-        if not inspect.isclass(exception_class):
-            raise NotImplementedError("Exception type must be a class")
-        if issubclass(exception_class, core_language.RuntimeException):
-            exception_id = exception_class.eid
-        else:
-            exception_id = self.rm.exception_mapper.encode(exception_class)
-        return ast.copy_location(
-            ast.Call(func=ast.Name("EncodedException", ast.Load()),
-                     args=[value_to_ast(exception_id)],
-                     keywords=[], starargs=None, kwargs=None),
-            e)
-
-    def visit_Raise(self, node):
-        if node.cause is not None:
-            raise NotImplementedError("Exception causes are not supported")
-        if node.exc is not None:
-            node.exc = self._encode_exception(node.exc)
-        return node
-
-    def visit_ExceptHandler(self, node):
-        if node.name is not None:
-            raise NotImplementedError("'as target' is not supported")
-        if node.type is not None:
-            if isinstance(node.type, ast.Tuple):
-                node.type.elts = [self._encode_exception(e) for e in node.type.elts]
-            else:
-                node.type = self._encode_exception(node.type)
-        self.generic_visit(node)
-        return node
-
-
-def _initialize_function_params(func_def, k_args, k_kwargs, rm):
-    obj = k_args[0]
-    func_name = func_def.name
     param_init = []
-    for arg_ast, arg_value in zip(func_def.args.args, k_args):
+    for (_, attr), attr_info in attribute_namespace.items():
-        if isinstance(arg_value, ast.AST):
+        value = getattr(attr_info.obj, attr)
-            value = arg_value
+        value = ast.copy_location(value_to_ast(value), func_def)
-        else:
+        target = ast.copy_location(ast.Name(attr_info.mangled_name,
-            try:
+                                            ast.Store()),
-                value = value_to_ast(arg_value)
+                                   func_def)
-            except NotASTRepresentable:
+        assign = ast.copy_location(ast.Assign([target], value),
-                value = None
+                                   func_def)
-        if value is None:
+        param_init.append(assign)
-            rm.register_complex_object(obj, func_name, arg_ast.arg, arg_value)
-        else:
-            uservar = rm.resolve_name(obj, func_name, arg_ast.arg, True)
-            target = ast.Name(uservar.name, ast.Store())
-            param_init.append(ast.Assign(targets=[target], value=value))
-    return param_init
-
-
-def inline(core, k_function, k_args, k_kwargs, rm=None, retval_name=None):
-    init_kernel_attr = rm is None
-    if rm is None:
-        rm = _ReferenceManager()
-
-    func_def = ast.parse(textwrap.dedent(inspect.getsource(k_function))).body[0]
-
-    param_init = _initialize_function_params(func_def, k_args, k_kwargs, rm)
-
-    obj = k_args[0]
-    func_name = func_def.name
-    rr = _ReferenceReplacer(core, rm, obj, func_name, retval_name)
-    rr.visit(func_def)
-
     func_def.body[0:0] = param_init
-    if init_kernel_attr:
-        func_def.body[0:0] = rm.kernel_attr_init
 
-    return func_def, rm.rpc_mapper.get_map(), rm.exception_mapper.get_map()
+    return func_def, mappers.rpc.get_map(), mappers.exception.get_map()