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)
;
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