def get_field_descr(gccache, STRUCT, fieldname):
cache = gccache._cache_field
try:
return cache[STRUCT][fieldname]
except KeyError:
offset, size = symbolic.get_field_token(STRUCT, fieldname,
gccache.translate_support_code)
FIELDTYPE = getattr(STRUCT, fieldname)
flag = get_type_flag(FIELDTYPE)
name = '%s.%s' % (STRUCT._name, fieldname)
index_in_parent = heaptracker.get_fielddescr_index_in(STRUCT, fieldname)
is_pure = STRUCT._immutable_field(fieldname) != False
fielddescr = FieldDescr(name, offset, size, flag, index_in_parent,
is_pure)
cachedict = cache.setdefault(STRUCT, {})
cachedict[fieldname] = fielddescr
if STRUCT is rclass.OBJECT:
vtable = lltype.nullptr(rclass.OBJECT_VTABLE)
else:
vtable = heaptracker.get_vtable_for_gcstruct(gccache, STRUCT)
fielddescr.parent_descr = get_size_descr(gccache, STRUCT, vtable)
return fielddescr
def get_field_descr(gccache, STRUCT, fieldname):
cache = gccache._cache_field
try:
return cache[STRUCT][fieldname]
except KeyError:
offset, size = symbolic.get_field_token(STRUCT, fieldname,
gccache.translate_support_code)
FIELDTYPE = getattr(STRUCT, fieldname)
flag = get_type_flag(FIELDTYPE)
name = '%s.%s' % (STRUCT._name, fieldname)
index_in_parent = heaptracker.get_fielddescr_index_in(STRUCT, fieldname)
is_pure = STRUCT._immutable_field(fieldname) != False
fielddescr = FieldDescr(name, offset, size, flag, index_in_parent,
is_pure)
cachedict = cache.setdefault(STRUCT, {})
cachedict[fieldname] = fielddescr
if STRUCT is rclass.OBJECT:
vtable = lltype.nullptr(rclass.OBJECT_VTABLE)
else:
vtable = heaptracker.get_vtable_for_gcstruct(gccache, STRUCT)
fielddescr.parent_descr = get_size_descr(gccache, STRUCT, vtable)
return fielddescr
def __init__(self, S, fieldname):
self.S = S
self.fieldname = fieldname
self.FIELD = getattr(S, fieldname)
self.index = heaptracker.get_fielddescr_index_in(S, fieldname)
self._is_pure = S._immutable_field(fieldname)