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| author | Victor Stinner <victor.stinner@haypocalc.com> | 2012-01-29 23:07:43 (GMT) |
|---|---|---|
| committer | Victor Stinner <victor.stinner@haypocalc.com> | 2012-01-29 23:07:43 (GMT) |
| commit | a2477208c8bb94fe109f46b30d77d60276dfebe2 (patch) | |
| tree | 57ed8c9212bb92eed22de6222ca44a3e0bcbff43 | |
| parent | 7ab4af0427a100e1054dea6137381c5dbf843530 (diff) | |
| download | cpython-a2477208c8bb94fe109f46b30d77d60276dfebe2.zip cpython-a2477208c8bb94fe109f46b30d77d60276dfebe2.tar.gz cpython-a2477208c8bb94fe109f46b30d77d60276dfebe2.tar.bz2 | |
Issue #13874: read_null() of faulthandler uses volatile to avoid optimisation
Clang 3.0 removes "y = *x;" instruction if the optimisation level is 3.
| -rw-r--r-- | Modules/faulthandler.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c index fcf4d01..f18bbbc 100644 --- a/Modules/faulthandler.c +++ b/Modules/faulthandler.c @@ -943,10 +943,13 @@ faulthandler_unregister_py(PyObject *self, PyObject *args) 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; |