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import py
from rpython.rtyper.lltypesystem import lltype, llmemory
from rpython.memory.gc.incminimark import IncrementalMiniMarkGC
from rpython.memory.gc.test.test_direct import BaseDirectGCTest
from rpython.rlib.rawrefcount import REFCNT_FROM_PYPY
from rpython.rlib.rawrefcount import REFCNT_FROM_PYPY_LIGHT
PYOBJ_HDR = IncrementalMiniMarkGC.PYOBJ_HDR
PYOBJ_HDR_PTR = IncrementalMiniMarkGC.PYOBJ_HDR_PTR
S = lltype.GcForwardReference()
S.become(lltype.GcStruct('S',
('x', lltype.Signed),
('prev', lltype.Ptr(S)),
('next', lltype.Ptr(S))))
class TestRawRefCount(BaseDirectGCTest):
GCClass = IncrementalMiniMarkGC
def _collect(self, major, expected_trigger=0):
if major:
self.gc.collect()
else:
self.gc._minor_collection()
count1 = len(self.trigger)
self.gc.rrc_invoke_callback()
count2 = len(self.trigger)
assert count2 - count1 == expected_trigger
def _rawrefcount_pair(self, intval, is_light=False, is_pyobj=False,
create_old=False, create_immortal=False,
force_external=False):
if is_light:
rc = REFCNT_FROM_PYPY_LIGHT
else:
rc = REFCNT_FROM_PYPY
self.trigger = []
self.gc.rawrefcount_init(lambda: self.trigger.append(1))
#
if create_immortal:
p1 = lltype.malloc(S, immortal=True)
else:
saved = self.gc.nonlarge_max
try:
if force_external:
self.gc.nonlarge_max = 1
p1 = self.malloc(S)
finally:
self.gc.nonlarge_max = saved
p1.x = intval
if create_immortal:
self.consider_constant(p1)
elif create_old:
self.stackroots.append(p1)
self._collect(major=False)
p1 = self.stackroots.pop()
p1ref = lltype.cast_opaque_ptr(llmemory.GCREF, p1)
r1 = lltype.malloc(PYOBJ_HDR, flavor='raw', immortal=create_immortal)
r1.ob_refcnt = rc
r1.ob_pypy_link = 0
r1addr = llmemory.cast_ptr_to_adr(r1)
if is_pyobj:
assert not is_light
self.gc.rawrefcount_create_link_pyobj(p1ref, r1addr)
else:
self.gc.rawrefcount_create_link_pypy(p1ref, r1addr)
assert r1.ob_refcnt == rc
assert r1.ob_pypy_link != 0
def check_alive(extra_refcount):
assert r1.ob_refcnt == rc + extra_refcount
assert r1.ob_pypy_link != 0
p1ref = self.gc.rawrefcount_to_obj(r1addr)
p1 = lltype.cast_opaque_ptr(lltype.Ptr(S), p1ref)
assert p1.x == intval
if not is_pyobj:
assert self.gc.rawrefcount_from_obj(p1ref) == r1addr
else:
assert self.gc.rawrefcount_from_obj(p1ref) == llmemory.NULL
return p1
return p1, p1ref, r1, r1addr, check_alive
def test_rawrefcount_objects_basic(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=True, create_old=old))
p2 = self.malloc(S)
p2.x = 84
p2ref = lltype.cast_opaque_ptr(llmemory.GCREF, p2)
r2 = lltype.malloc(PYOBJ_HDR, flavor='raw')
r2.ob_refcnt = 1
r2.ob_pypy_link = 0
r2addr = llmemory.cast_ptr_to_adr(r2)
# p2 and r2 are not linked
assert r1.ob_pypy_link != 0
assert r2.ob_pypy_link == 0
assert self.gc.rawrefcount_from_obj(p1ref) == r1addr
assert self.gc.rawrefcount_from_obj(p2ref) == llmemory.NULL
assert self.gc.rawrefcount_to_obj(r1addr) == p1ref
assert self.gc.rawrefcount_to_obj(r2addr) == lltype.nullptr(
llmemory.GCREF.TO)
lltype.free(r1, flavor='raw')
lltype.free(r2, flavor='raw')
def test_rawrefcount_objects_collection_survives_from_raw(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=True, create_old=old))
check_alive(0)
r1.ob_refcnt += 1
self._collect(major=False)
check_alive(+1)
self._collect(major=True)
check_alive(+1)
r1.ob_refcnt -= 1
self._collect(major=False)
p1 = check_alive(0)
self._collect(major=True)
py.test.raises(RuntimeError, "r1.ob_refcnt") # dead
py.test.raises(RuntimeError, "p1.x") # dead
self.gc.check_no_more_rawrefcount_state()
assert self.trigger == []
assert self.gc.rawrefcount_next_dead() == llmemory.NULL
def test_rawrefcount_dies_quickly(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=True, create_old=old))
check_alive(0)
self._collect(major=False)
if old:
check_alive(0)
self._collect(major=True)
py.test.raises(RuntimeError, "r1.ob_refcnt") # dead
py.test.raises(RuntimeError, "p1.x") # dead
self.gc.check_no_more_rawrefcount_state()
def test_rawrefcount_objects_collection_survives_from_obj(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=True, create_old=old))
check_alive(0)
self.stackroots.append(p1)
self._collect(major=False)
check_alive(0)
self._collect(major=True)
check_alive(0)
p1 = self.stackroots.pop()
self._collect(major=False)
check_alive(0)
assert p1.x == 42
self._collect(major=True)
py.test.raises(RuntimeError, "r1.ob_refcnt") # dead
py.test.raises(RuntimeError, "p1.x") # dead
self.gc.check_no_more_rawrefcount_state()
def test_rawrefcount_objects_basic_old(self):
self.test_rawrefcount_objects_basic(old=True)
def test_rawrefcount_objects_collection_survives_from_raw_old(self):
self.test_rawrefcount_objects_collection_survives_from_raw(old=True)
def test_rawrefcount_dies_quickly_old(self):
self.test_rawrefcount_dies_quickly(old=True)
def test_rawrefcount_objects_collection_survives_from_obj_old(self):
self.test_rawrefcount_objects_collection_survives_from_obj(old=True)
def test_pypy_nonlight_survives_from_raw(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=False, create_old=old))
check_alive(0)
r1.ob_refcnt += 1
self._collect(major=False)
check_alive(+1)
self._collect(major=True)
check_alive(+1)
r1.ob_refcnt -= 1
self._collect(major=False)
p1 = check_alive(0)
self._collect(major=True, expected_trigger=1)
py.test.raises(RuntimeError, "p1.x") # dead
assert r1.ob_refcnt == 1 # in the pending list
assert r1.ob_pypy_link == 0
assert self.gc.rawrefcount_next_dead() == r1addr
assert self.gc.rawrefcount_next_dead() == llmemory.NULL
assert self.gc.rawrefcount_next_dead() == llmemory.NULL
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
def test_pypy_nonlight_survives_from_obj(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=False, create_old=old))
check_alive(0)
self.stackroots.append(p1)
self._collect(major=False)
check_alive(0)
self._collect(major=True)
check_alive(0)
p1 = self.stackroots.pop()
self._collect(major=False)
check_alive(0)
assert p1.x == 42
self._collect(major=True, expected_trigger=1)
py.test.raises(RuntimeError, "p1.x") # dead
assert r1.ob_refcnt == 1
assert r1.ob_pypy_link == 0
assert self.gc.rawrefcount_next_dead() == r1addr
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
def test_pypy_nonlight_dies_quickly(self, old=False):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_light=False, create_old=old))
check_alive(0)
if old:
self._collect(major=False)
check_alive(0)
self._collect(major=True, expected_trigger=1)
else:
self._collect(major=False, expected_trigger=1)
py.test.raises(RuntimeError, "p1.x") # dead
assert r1.ob_refcnt == 1
assert r1.ob_pypy_link == 0
assert self.gc.rawrefcount_next_dead() == r1addr
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
def test_pypy_nonlight_survives_from_raw_old(self):
self.test_pypy_nonlight_survives_from_raw(old=True)
def test_pypy_nonlight_survives_from_obj_old(self):
self.test_pypy_nonlight_survives_from_obj(old=True)
def test_pypy_nonlight_dies_quickly_old(self):
self.test_pypy_nonlight_dies_quickly(old=True)
@py.test.mark.parametrize('external', [False, True])
def test_pyobject_pypy_link_dies_on_minor_collection(self, external):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_pyobj=True, force_external=external))
check_alive(0)
r1.ob_refcnt += 1 # the pyobject is kept alive
self._collect(major=False)
assert r1.ob_refcnt == 1 # refcnt dropped to 1
assert r1.ob_pypy_link == 0 # detached
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
@py.test.mark.parametrize('old,external', [
(False, False), (True, False), (False, True)])
def test_pyobject_dies(self, old, external):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_pyobj=True, create_old=old,
force_external=external))
check_alive(0)
if old:
self._collect(major=False)
check_alive(0)
self._collect(major=True, expected_trigger=1)
else:
self._collect(major=False, expected_trigger=1)
assert r1.ob_refcnt == 1 # refcnt 1, in the pending list
assert r1.ob_pypy_link == 0 # detached
assert self.gc.rawrefcount_next_dead() == r1addr
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
@py.test.mark.parametrize('old,external', [
(False, False), (True, False), (False, True)])
def test_pyobject_survives_from_obj(self, old, external):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, is_pyobj=True, create_old=old,
force_external=external))
check_alive(0)
self.stackroots.append(p1)
self._collect(major=False)
check_alive(0)
self._collect(major=True)
check_alive(0)
p1 = self.stackroots.pop()
self._collect(major=False)
check_alive(0)
assert p1.x == 42
assert self.trigger == []
self._collect(major=True, expected_trigger=1)
py.test.raises(RuntimeError, "p1.x") # dead
assert r1.ob_refcnt == 1
assert r1.ob_pypy_link == 0
assert self.gc.rawrefcount_next_dead() == r1addr
self.gc.check_no_more_rawrefcount_state()
lltype.free(r1, flavor='raw')
def test_pyobject_attached_to_prebuilt_obj(self):
p1, p1ref, r1, r1addr, check_alive = (
self._rawrefcount_pair(42, create_immortal=True))
check_alive(0)
self._collect(major=True)
check_alive(0)
|
