Issue #10363: Deallocate global locks in Py_Finalize().

Misc/NEWS

@@ -10,6 +10,8 @@ What's New in Python 3.3 Alpha 1?
 Core and Builtins
 -----------------
 
+- Issue #10363: Deallocate global locks in Py_Finalize().
+
 - Issue #13018: Fix reference leaks in error paths in dictobject.c.
   Patch by Suman Saha.
 

Python/import.c

@@ -268,16 +268,6 @@ _PyImportHooks_Init(void)
     Py_DECREF(path_hooks);
 }
 
-void
-_PyImport_Fini(void)
-{
-    Py_XDECREF(extensions);
-    extensions = NULL;
-    PyMem_DEL(_PyImport_Filetab);
-    _PyImport_Filetab = NULL;
-}
-
-
 /* Locking primitives to prevent parallel imports of the same module
    in different threads to return with a partially loaded module.
    These calls are serialized by the global interpreter lock. */
@@ -390,6 +380,21 @@ imp_release_lock(PyObject *self, PyObject *noargs)
     return Py_None;
 }
 
+void
+_PyImport_Fini(void)
+{
+    Py_XDECREF(extensions);
+    extensions = NULL;
+    PyMem_DEL(_PyImport_Filetab);
+    _PyImport_Filetab = NULL;
+#ifdef WITH_THREAD
+    if (import_lock != NULL) {
+        PyThread_free_lock(import_lock);
+        import_lock = NULL;
+    }
+#endif
+}
+
 static void
 imp_modules_reloading_clear(void)
 {

Python/pystate.c

@@ -150,6 +150,12 @@ PyInterpreterState_Delete(PyInterpreterState *interp)
     *p = interp->next;
     HEAD_UNLOCK();
     free(interp);
+#ifdef WITH_THREAD
+    if (interp_head == NULL && head_mutex != NULL) {
+        PyThread_free_lock(head_mutex);
+        head_mutex = NULL;
+    }
+#endif
 }