def get_size_descr(gccache,
STRUCT,
vtable=lltype.nullptr(rclass.OBJECT_VTABLE)):
cache = gccache._cache_size
assert not isinstance(vtable, bool)
try:
return cache[STRUCT]
except KeyError:
size = symbolic.get_size(STRUCT, gccache.translate_support_code)
immutable_flag = heaptracker.is_immutable_struct(STRUCT)
if vtable:
assert heaptracker.has_gcstruct_a_vtable(STRUCT)
else:
assert not heaptracker.has_gcstruct_a_vtable(STRUCT)
sizedescr = SizeDescr(size,
vtable=vtable,
immutable_flag=immutable_flag)
gccache.init_size_descr(STRUCT, sizedescr)
cache[STRUCT] = sizedescr
# XXX do we really need gc_fielddescrs if we also have
# all_fielddescrs and can ask is_pointer_field() on them?
gc_fielddescrs = heaptracker.gc_fielddescrs(gccache, STRUCT)
sizedescr.gc_fielddescrs = gc_fielddescrs
all_fielddescrs = heaptracker.all_fielddescrs(gccache, STRUCT)
sizedescr.all_fielddescrs = all_fielddescrs
return sizedescr
def check_is_object(self, gcptr):
"""Check if the given, non-null gcptr refers to an rclass.OBJECT
or not at all (an unrelated GcStruct or a GcArray). Only usable
in the llgraph backend, or after translation of a real backend."""
ptr = lltype.normalizeptr(gcptr._obj.container._as_ptr())
T = lltype.typeOf(ptr).TO
return heaptracker.has_gcstruct_a_vtable(T) or T is rclass.OBJECT
def get_size_descr(gccache, STRUCT):
cache = gccache._cache_size
try:
return cache[STRUCT]
except KeyError:
size = symbolic.get_size(STRUCT, gccache.translate_support_code)
count_fields_if_immut = heaptracker.count_fields_if_immutable(STRUCT)
if heaptracker.has_gcstruct_a_vtable(STRUCT):
sizedescr = SizeDescrWithVTable(size, count_fields_if_immut)
else:
sizedescr = SizeDescr(size, count_fields_if_immut)
gccache.init_size_descr(STRUCT, sizedescr)
cache[STRUCT] = sizedescr
return sizedescr
def get_size_descr(gccache, STRUCT, vtable=lltype.nullptr(rclass.OBJECT_VTABLE)):
cache = gccache._cache_size
assert not isinstance(vtable, bool)
try:
return cache[STRUCT]
except KeyError:
size = symbolic.get_size(STRUCT, gccache.translate_support_code)
immutable_flag = heaptracker.is_immutable_struct(STRUCT)
if vtable:
assert heaptracker.has_gcstruct_a_vtable(STRUCT)
else:
assert not heaptracker.has_gcstruct_a_vtable(STRUCT)
sizedescr = SizeDescr(size, vtable=vtable,
immutable_flag=immutable_flag)
gccache.init_size_descr(STRUCT, sizedescr)
cache[STRUCT] = sizedescr
# XXX do we really need gc_fielddescrs if we also have
# all_fielddescrs and can ask is_pointer_field() on them?
gc_fielddescrs = heaptracker.gc_fielddescrs(gccache, STRUCT)
sizedescr.gc_fielddescrs = gc_fielddescrs
all_fielddescrs = heaptracker.all_fielddescrs(gccache, STRUCT)
sizedescr.all_fielddescrs = all_fielddescrs
return sizedescr
def fielddescrof(self, S, fieldname):
key = ('field', S, fieldname)
try:
return self.descrs[key]
except KeyError:
descr = FieldDescr(S, fieldname)
self.descrs[key] = descr
if (isinstance(S, lltype.GcStruct) and
heaptracker.has_gcstruct_a_vtable(S)):
vtable = Ellipsis
else:
vtable = None
descr.parent_descr = self.sizeof(S, vtable)
if self.vinfo_for_tests is not None:
descr.vinfo = self.vinfo_for_tests
return descr
def get_size_descr(gccache, STRUCT):
cache = gccache._cache_size
try:
return cache[STRUCT]
except KeyError:
size = symbolic.get_size(STRUCT, gccache.translate_support_code)
count_fields_if_immut = heaptracker.count_fields_if_immutable(STRUCT)
gc_fielddescrs = heaptracker.gc_fielddescrs(gccache, STRUCT)
if heaptracker.has_gcstruct_a_vtable(STRUCT):
sizedescr = SizeDescrWithVTable(size, count_fields_if_immut,
gc_fielddescrs)
else:
sizedescr = SizeDescr(size, count_fields_if_immut,
gc_fielddescrs)
gccache.init_size_descr(STRUCT, sizedescr)
cache[STRUCT] = sizedescr
return sizedescr