gh-140373: Correctly emit `PY_UNWIND` event when generator is closed (GH-140767)

diff --git a/Include/internal/pycore_ceval.h b/Include/internal/pycore_ceval.h
index 102a378f8f08bc6d5057e4eaa2bf4706858bc7e4..fe72a0123ebea8660c0397b66d676e58ba9c4335 100644 (file)
--- a/Include/internal/pycore_ceval.h
+++ b/Include/internal/pycore_ceval.h
@@ -301,6 +301,7 @@ PyAPI_FUNC(PyObject *) _PyEval_ImportName(PyThreadState *, _PyInterpreterFrame *
 PyAPI_FUNC(PyObject *)_PyEval_MatchClass(PyThreadState *tstate, PyObject *subject, PyObject *type, Py_ssize_t nargs, PyObject *kwargs);
 PyAPI_FUNC(PyObject *)_PyEval_MatchKeys(PyThreadState *tstate, PyObject *map, PyObject *keys);
 PyAPI_FUNC(void) _PyEval_MonitorRaise(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr);
+PyAPI_FUNC(bool) _PyEval_NoToolsForUnwind(PyThreadState *tstate);
 PyAPI_FUNC(int) _PyEval_UnpackIterableStackRef(PyThreadState *tstate, PyObject *v, int argcnt, int argcntafter, _PyStackRef *sp);
 PyAPI_FUNC(void) _PyEval_FrameClearAndPop(PyThreadState *tstate, _PyInterpreterFrame *frame);
 PyAPI_FUNC(PyObject **) _PyObjectArray_FromStackRefArray(_PyStackRef *input, Py_ssize_t nargs, PyObject **scratch);

diff --git a/Lib/test/test_monitoring.py b/Lib/test/test_monitoring.py
index 4122f786a9afb094f1dd50232abf4e9a22c7d9d1..9b940740ca1bf95cf14c1b53d13dc8a0bb0b2f47 100644 (file)
--- a/Lib/test/test_monitoring.py
+++ b/Lib/test/test_monitoring.py
@@ -1079,6 +1079,25 @@ class ExceptionMonitoringTest(CheckEvents):
 
         self.assertEqual(events, expected)
 
+    # gh-140373
+    def test_gen_unwind(self):
+        def gen():
+            yield 1
+
+        def f():
+            g = gen()
+            next(g)
+            g.close()
+
+        recorders = (
+            UnwindRecorder,
+        )
+        events = self.get_events(f, TEST_TOOL, recorders)
+        expected = [
+            ("unwind", GeneratorExit, "gen"),
+        ]
+        self.assertEqual(events, expected)
+
 class LineRecorder:
 
     event_type = E.LINE

diff --git a/Lib/test/test_sys_setprofile.py b/Lib/test/test_sys_setprofile.py
index 345c022bd2374c763367f961771b91c874fc1b27..a22b728b56941969bdc5a3ac018d55134c9926e0 100644 (file)
--- a/Lib/test/test_sys_setprofile.py
+++ b/Lib/test/test_sys_setprofile.py
@@ -272,6 +272,8 @@ class ProfileHookTestCase(TestCaseBase):
         self.check_events(g, [(1, 'call', g_ident, None),
                               (2, 'call', f_ident, None),
                               (2, 'return', f_ident, 0),
+                              (2, 'call', f_ident, None),
+                              (2, 'return', f_ident, None),
                               (1, 'return', g_ident, None),
                               ], check_args=True)
 

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst
new file mode 100644 (file)
index 0000000..c9a9703
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-29-20-59-10.gh-issue-140373.-uoaPP.rst
@@ -0,0 +1,2 @@
+Correctly emit ``PY_UNWIND`` event when generator object is closed. Patch by
+Mikhail Efimov.

diff --git a/Objects/genobject.c b/Objects/genobject.c
index 2371ad16d5c1a666e2f4cc2fcdda7b6f3feefb8a..e47180a23d262652e4a878c073de27ecfdf0c3c8 100644 (file)
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -407,11 +407,12 @@ gen_close(PyObject *self, PyObject *args)
     }
     _PyInterpreterFrame *frame = &gen->gi_iframe;
     if (is_resume(frame->instr_ptr)) {
+        bool no_unwind_tools = _PyEval_NoToolsForUnwind(_PyThreadState_GET());
         /* We can safely ignore the outermost try block
          * as it is automatically generated to handle
          * StopIteration. */
         int oparg = frame->instr_ptr->op.arg;
-        if (oparg & RESUME_OPARG_DEPTH1_MASK) {
+        if (oparg & RESUME_OPARG_DEPTH1_MASK && no_unwind_tools) {
             // RESUME after YIELD_VALUE and exception depth is 1
             assert((oparg & RESUME_OPARG_LOCATION_MASK) != RESUME_AT_FUNC_START);
             gen->gi_frame_state = FRAME_COMPLETED;

diff --git a/Python/ceval.c b/Python/ceval.c
index 7ec5abf5a76bd97ca5e778df39c4de8d3bbe275f..7ca7ae48b5c88a2a2a9514748e037f8c3347a70c 100644 (file)
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2466,6 +2466,10 @@ monitor_unwind(PyThreadState *tstate,
     do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_PY_UNWIND);
 }
 
+bool
+_PyEval_NoToolsForUnwind(PyThreadState *tstate) {
+    return no_tools_for_global_event(tstate, PY_MONITORING_EVENT_PY_UNWIND);
+}
 
 static int
 monitor_handled(PyThreadState *tstate,