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import py
from rpython.memory.gctransform.test.test_transform import rtype, rtype_and_transform, getops
from rpython.memory.gctransform.test.test_transform import LLInterpedTranformerTests
from rpython.memory.gctransform.refcounting import RefcountingGCTransformer
from rpython.rtyper.lltypesystem import lltype
from rpython.translator.translator import TranslationContext, graphof
from rpython.translator.c.gc import RefcountingGcPolicy
from rpython.conftest import option
class TestLLInterpedRefcounting(LLInterpedTranformerTests):
gcpolicy = RefcountingGcPolicy
def test_llinterp_refcounted_graph_with_del(self):
from rpython.annotator.model import SomeInteger
class D:
pass
delcounter = D()
delcounter.dels = 0
class C:
def __del__(self):
delcounter.dels += 1
c = C()
c.x = 1
def h(x):
if x:
return c
else:
d = C()
d.x = 2
return d
def g(x):
return h(x).x
def f(x):
r = g(x)
return r + delcounter.dels
llinterp, graph = self.llinterpreter_for_transformed_graph(f, [SomeInteger()])
res = llinterp.eval_graph(graph, [1])
assert res == 1
res = llinterp.eval_graph(graph, [0])
assert res == 3
def test_raw_instance_flavor(self):
# crashes for now because X() is not initialized with zeroes when
# it is allocated, but it's probably illegal to try to store
# references into a raw-malloced instance
py.test.skip("a probably-illegal test")
class State:
pass
state = State()
class Y:
def __del__(self):
state.freed_counter += 1
class X:
_alloc_flavor_ = 'raw'
def g():
x = X()
x.y = Y()
return x
def f():
from rpython.rlib.objectmodel import free_non_gc_object
state.freed_counter = 0
x = g()
assert state.freed_counter == 0
x.y = None
assert state.freed_counter == 1
free_non_gc_object(x)
# for now we have no automatic decref when free_non_gc_object() is
# called
llinterp, graph = self.llinterpreter_for_transformed_graph(f, [])
llinterp.eval_graph(graph, [])
def test_simple_barrier():
S = lltype.GcStruct("S", ('x', lltype.Signed))
T = lltype.GcStruct("T", ('s', lltype.Ptr(S)))
def f():
s1 = lltype.malloc(S)
s1.x = 1
s2 = lltype.malloc(S)
s2.x = 2
t = lltype.malloc(T)
t.s = s1
t.s = s2
return t
t, transformer = rtype_and_transform(f, [], RefcountingGCTransformer,
check=False)
graph = graphof(t, f)
ops = getops(graph)
assert len(ops['getfield']) == 2
assert len(ops['bare_setfield']) == 4
def test_arraybarrier():
S = lltype.GcStruct("S", ('x', lltype.Signed))
A = lltype.GcArray(lltype.Ptr(S))
def f():
s1 = lltype.malloc(S)
s1.x = 1
s2 = lltype.malloc(S)
s2.x = 2
a = lltype.malloc(A, 1)
a[0] = s1
a[0] = s2
t, transformer = rtype_and_transform(f, [], RefcountingGCTransformer,
check=False)
graph = graphof(t, f)
ops = getops(graph)
assert len(ops['getarrayitem']) == 2
assert len(ops['bare_setarrayitem']) == 2
assert len(ops['bare_setfield']) == 2
def make_deallocator(TYPE,
attr="static_deallocation_funcptr_for_type",
cls=RefcountingGCTransformer):
if TYPE._is_varsize():
def f():
return lltype.malloc(TYPE, 1)
else:
def f():
return lltype.malloc(TYPE)
t = TranslationContext()
t.buildannotator().build_types(f, [])
t.buildrtyper().specialize()
transformer = cls(t)
fptr = getattr(transformer, attr)(TYPE)
transformer.transform_graph(graphof(t, f))
transformer.finish(backendopt=False)
if option.view:
t.view()
if fptr:
return fptr._obj.graph, t
else:
return None, t
def test_deallocator_simple():
S = lltype.GcStruct("S", ('x', lltype.Signed))
dgraph, t = make_deallocator(S)
ops = []
for block in dgraph.iterblocks():
ops.extend([op for op in block.operations if op.opname != 'same_as']) # XXX
assert len(ops) == 1
op = ops[0]
assert op.opname == 'gc_free'
def test_deallocator_less_simple():
TPtr = lltype.Ptr(lltype.GcStruct("T", ('a', lltype.Signed)))
S = lltype.GcStruct(
"S",
('x', lltype.Signed),
('y', TPtr),
('z', TPtr),
)
dgraph, t = make_deallocator(S)
ops = getops(dgraph)
assert len(ops['direct_call']) == 2
assert len(ops['getfield']) == 2
assert len(ops['gc_free']) == 1
def test_deallocator_array():
TPtr = lltype.Ptr(lltype.GcStruct("T", ('a', lltype.Signed)))
GcA = lltype.GcArray(('x', TPtr), ('y', TPtr))
A = lltype.Array(('x', TPtr), ('y', TPtr))
APtr = lltype.Ptr(GcA)
S = lltype.GcStruct('S', ('t', TPtr), ('x', lltype.Signed), ('aptr', APtr),
('rest', A))
dgraph, t = make_deallocator(S)
ops = getops(dgraph)
assert len(ops['direct_call']) == 4
assert len(ops['getfield']) == 2
assert len(ops['getinteriorfield']) == 2
assert len(ops['getinteriorarraysize']) == 1
assert len(ops['gc_free']) == 1
def test_deallocator_with_destructor():
S = lltype.GcStruct("S", ('x', lltype.Signed), rtti=True)
def f(s):
s.x = 1
def type_info_S(p):
return lltype.getRuntimeTypeInfo(S)
qp = lltype.functionptr(lltype.FuncType([lltype.Ptr(S)],
lltype.Ptr(lltype.RuntimeTypeInfo)),
"type_info_S",
_callable=type_info_S)
dp = lltype.functionptr(lltype.FuncType([lltype.Ptr(S)],
lltype.Void),
"destructor_funcptr",
_callable=f)
pinf = lltype.attachRuntimeTypeInfo(S, qp, destrptr=dp)
graph, t = make_deallocator(S)
def test_caching_dynamic_deallocator():
S = lltype.GcStruct("S", ('x', lltype.Signed), rtti=True)
S1 = lltype.GcStruct("S1", ('s', S), ('y', lltype.Signed), rtti=True)
T = lltype.GcStruct("T", ('x', lltype.Signed), rtti=True)
def f_S(s):
s.x = 1
def f_S1(s1):
s1.s.x = 1
s1.y = 2
def f_T(s):
s.x = 1
def type_info_S(p):
return lltype.getRuntimeTypeInfo(S)
def type_info_T(p):
return lltype.getRuntimeTypeInfo(T)
qp = lltype.functionptr(lltype.FuncType([lltype.Ptr(S)],
lltype.Ptr(lltype.RuntimeTypeInfo)),
"type_info_S",
_callable=type_info_S)
dp = lltype.functionptr(lltype.FuncType([lltype.Ptr(S)],
lltype.Void),
"destructor_funcptr",
_callable=f_S)
pinf = lltype.attachRuntimeTypeInfo(S, qp, destrptr=dp)
dp = lltype.functionptr(lltype.FuncType([lltype.Ptr(S)],
lltype.Void),
"destructor_funcptr",
_callable=f_S1)
pinf = lltype.attachRuntimeTypeInfo(S1, qp, destrptr=dp)
qp = lltype.functionptr(lltype.FuncType([lltype.Ptr(T)],
lltype.Ptr(lltype.RuntimeTypeInfo)),
"type_info_S",
_callable=type_info_T)
dp = lltype.functionptr(lltype.FuncType([lltype.Ptr(T)],
lltype.Void),
"destructor_funcptr",
_callable=f_T)
pinf = lltype.attachRuntimeTypeInfo(T, qp, destrptr=dp)
def f():
pass
t = TranslationContext()
t.buildannotator().build_types(f, [])
t.buildrtyper().specialize()
transformer = RefcountingGCTransformer(t)
p_S = transformer.dynamic_deallocation_funcptr_for_type(S)
p_S1 = transformer.dynamic_deallocation_funcptr_for_type(S1)
p_T = transformer.dynamic_deallocation_funcptr_for_type(T)
assert p_S is not p_T
assert p_S is p_S1
def test_dynamic_deallocator():
class A(object):
pass
class B(A):
pass
def f(x):
a = A()
a.x = 1
b = B()
b.x = 2
b.y = 3
if x:
c = a
else:
c = b
return c.x
t, transformer = rtype_and_transform(
f, [int], RefcountingGCTransformer, check=False)
fgraph = graphof(t, f)
s_instance = t.annotator.bookkeeper.valueoftype(A)
TYPE = t.rtyper.getrepr(s_instance).lowleveltype.TO
p = transformer.dynamic_deallocation_funcptr_for_type(TYPE)
t.rtyper.specialize_more_blocks()
def test_recursive_structure():
F = lltype.GcForwardReference()
S = lltype.GcStruct('abc', ('x', lltype.Ptr(F)))
F.become(S)
def f():
s1 = lltype.malloc(S)
s2 = lltype.malloc(S)
s1.x = s2
t, transformer = rtype_and_transform(
f, [], RefcountingGCTransformer, check=False)
def test_dont_decref_nongc_pointers():
S = lltype.GcStruct('S',
('x', lltype.Ptr(lltype.Struct('T', ('x', lltype.Signed)))),
('y', lltype.Ptr(lltype.GcStruct('Y', ('x', lltype.Signed))))
)
def f():
pass
graph, t = make_deallocator(S)
ops = getops(graph)
assert len(ops['direct_call']) == 1
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