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gh-114312: Collect stats for unlikely events (GH-114493)

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Michael Droettboom 2024-01-25 06:10:51 -05:00 • committed by GitHub
parent c63c6142f9
commit ea3cd0498c
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11 changed files with 199 additions and 1 deletions
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18
Python/pylifecycle.c
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@ -605,6 +605,12 @@ init_interp_create_gil(PyThreadState *tstate, int gil)
_PyEval_InitGIL(tstate, own_gil);
}
static int
builtins_dict_watcher(PyDict_WatchEvent event, PyObject *dict, PyObject *key, PyObject *new_value)
{
RARE_EVENT_INC(builtin_dict);
return 0;
}
static PyStatus
pycore_create_interpreter(_PyRuntimeState *runtime,
@ -1266,6 +1272,14 @@ init_interp_main(PyThreadState *tstate)
}
}
if ((interp->rare_events.builtins_dict_watcher_id = PyDict_AddWatcher(&builtins_dict_watcher)) == -1) {
return _PyStatus_ERR("failed to add builtin dict watcher");
}
if (PyDict_Watch(interp->rare_events.builtins_dict_watcher_id, interp->builtins) != 0) {
return _PyStatus_ERR("failed to set builtin dict watcher");
}
assert(!_PyErr_Occurred(tstate));
return _PyStatus_OK();
@ -1592,6 +1606,10 @@ static void
finalize_modules(PyThreadState *tstate)
{
PyInterpreterState *interp = tstate->interp;
// Stop collecting stats on __builtin__ modifications during teardown
PyDict_Unwatch(interp->rare_events.builtins_dict_watcher_id, interp->builtins);
PyObject *modules = _PyImport_GetModules(interp);
if (modules == NULL) {
// Already done