cpython: f71249d785d6 (original) (raw)

Mercurial > cpython

changeset 74682:f71249d785d6

Issue #13874: read_null() of faulthandler uses volatile to avoid optimisation Clang 3.0 removes "y = *x;" instruction if the optimisation level is 3. [#13874]

Victor Stinner victor.stinner@haypocalc.com
date	Mon, 30 Jan 2012 00:07:43 +0100
parents	6bb05ce1cd1f
children	5b42aefb8969
files	Modules/faulthandler.c
diffstat	1 files changed, 4 insertions(+), 1 deletions(-)[+] [-] Modules/faulthandler.c 5

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--- a/Modules/faulthandler.c +++ b/Modules/faulthandler.c @@ -943,10 +943,13 @@ faulthandler_unregister_py(PyObject *sel static PyObject * faulthandler_read_null(PyObject *self, PyObject *args) {

int *x = NULL, y;

volatile int *x;
volatile int y; int release_gil = 0; if (!PyArg_ParseTuple(args, "|i:_read_null", &release_gil)) return NULL;

x = NULL; if (release_gil) { Py_BEGIN_ALLOW_THREADS y = *x;