bpo-9566: Fix size_t=>int downcast warnings (#5230)

* Use wider types (int => Py_ssize_t) to avoid integer overflows.
* Fix gc.get_freeze_count(): use Py_ssize_t type rather than int, since gc_list_size() returns a Py_ssize_t.

2 files changed, 7 insertions, 7 deletions

diff --git a/Modules/clinic/gcmodule.c.h b/Modules/clinic/gcmodule.c.h
index c431af7..0330c81 100644
--- a/Modules/clinic/gcmodule.c.h
+++ b/Modules/clinic/gcmodule.c.h
@@ -307,22 +307,22 @@ PyDoc_STRVAR(gc_get_freeze_count__doc__,
 #define GC_GET_FREEZE_COUNT_METHODDEF    \
     {"get_freeze_count", (PyCFunction)gc_get_freeze_count, METH_NOARGS, gc_get_freeze_count__doc__},
 
-static int
+static Py_ssize_t
 gc_get_freeze_count_impl(PyObject *module);
 
 static PyObject *
 gc_get_freeze_count(PyObject *module, PyObject *Py_UNUSED(ignored))
 {
     PyObject *return_value = NULL;
-    int _return_value;
+    Py_ssize_t _return_value;
 
     _return_value = gc_get_freeze_count_impl(module);
     if ((_return_value == -1) && PyErr_Occurred()) {
         goto exit;
     }
-    return_value = PyLong_FromLong((long)_return_value);
+    return_value = PyLong_FromSsize_t(_return_value);
 
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=6f9ee4d8dd1f36c1 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=21dc9270b10b7891 input=a9049054013a1b77]*/
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index 121eb46..ea3c294 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -1449,14 +1449,14 @@ gc_unfreeze_impl(PyObject *module)
 }
 
 /*[clinic input]
-gc.get_freeze_count -> int
+gc.get_freeze_count -> Py_ssize_t
 
 Return the number of objects in the permanent generation.
 [clinic start generated code]*/
 
-static int
+static Py_ssize_t
 gc_get_freeze_count_impl(PyObject *module)
-/*[clinic end generated code: output=e4e2ebcc77e5cbf3 input=4b759db880a3c6e4]*/
+/*[clinic end generated code: output=61cbd9f43aa032e1 input=45ffbc65cfe2a6ed]*/
 {
     return gc_list_size(&_PyRuntime.gc.permanent_generation.head);
 }