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import sys
import pytest
from rpython.rlib import rstackovf
IS_PYPY = 'pypyjit' in sys.builtin_module_names
def recurse(n):
if n > 0:
return recurse(n-1) + n
return 0
def f(n):
try:
recurse(n)
except rstackovf.StackOverflow:
return 1
else:
return 0
def test_direct():
assert f(sys.maxint) == 1
class RecurseGetAttr(object):
def __getattr__(self, attr):
return getattr(self, attr)
def test_raises_AttributeError():
pytest.skip("not RPython code...")
rga = RecurseGetAttr()
try:
rga.y
except AttributeError:
pass
else:
pytest.skip("interpreter is not badly behaved")
pytest.raises(rstackovf.StackOverflow, getattr, rga, "y")
@pytest.mark.skipif(IS_PYPY, reason="can fail to overflow on PyPy")
def test_llinterp():
from rpython.rtyper.test.test_llinterp import interpret
res = interpret(f, [sys.maxint])
assert res == 1
def test_c_translation():
from rpython.translator.c.test.test_genc import compile
fn = compile(f, [int])
res = fn(sys.maxint)
assert res == 1
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