diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py index f648a8b2bc52f5..23fe2d3f4d32e2 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -1604,6 +1604,31 @@ def test_interrupt_main_invalid_signal(self): self.assertRaises(ValueError, _thread.interrupt_main, signal.NSIG) self.assertRaises(ValueError, _thread.interrupt_main, 1000000) + @threading_helper.reap_threads + def test_can_interrupt_tight_loops(self): + cont = [True] + started = [False] + interrupted = [False] + + def worker(started, cont, interrupted): + iterations = 100_000_000 + started[0] = True + while cont[0]: + if iterations: + iterations -= 1 + else: + return + pass + interrupted[0] = True + + t = threading.Thread(target=worker,args=(started, cont, interrupted)) + t.start() + while not started[0]: + pass + cont[0] = False + t.join() + self.assertTrue(interrupted[0]) + class AtexitTests(unittest.TestCase): diff --git a/Python/ceval.c b/Python/ceval.c index a6eb83a4909d72..90112aa3f9476e 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -3638,14 +3638,17 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag) if (Py_IsFalse(cond)) { Py_DECREF(cond); JUMPTO(oparg); + CHECK_EVAL_BREAKER(); DISPATCH(); } err = PyObject_IsTrue(cond); Py_DECREF(cond); if (err > 0) ; - else if (err == 0) + else if (err == 0) { JUMPTO(oparg); + CHECK_EVAL_BREAKER(); + } else goto error; DISPATCH(); @@ -3662,12 +3665,14 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag) if (Py_IsTrue(cond)) { Py_DECREF(cond); JUMPTO(oparg); + CHECK_EVAL_BREAKER(); DISPATCH(); } err = PyObject_IsTrue(cond); Py_DECREF(cond); if (err > 0) { JUMPTO(oparg); + CHECK_EVAL_BREAKER(); } else if (err == 0) ;