[New-bugs-announce] [issue1215] Python hang when catching a segfault

[Miki Tebeka]

New submission from Miki Tebeka:

The following code hangs Python:
#!/usr/bin/env python

import segfault
import signal
from os import _exit
from sys import stdout

def handler(signal, stackframe):
    print "OUCH"
    stdout.flush()
    _exit(1)

if __name__ == "__main__":
    from sys import argv

    signal.signal(signal.SIGSEGV, handler)
    segfault.segfault()

segfault is the following C module:
#include <Python.h>

static PyObject *
segfault(PyObject *self, PyObject *args)
{

    char *c;

    c = 0;
    *c = 'a';

    return Py_BuildValue("");
}

static PyMethodDef Methods[] = {
    { "segfault",  segfault, METH_VARARGS, "will segfault"},
    {NULL, NULL, 0, NULL}        /* Sentinel */
};

PyMODINIT_FUNC
initsegfault(void)
{
    Py_InitModule("segfault", Methods);
}

----------
components: Interpreter Core
messages: 56169
nosy: tebeka
severity: normal
status: open
title: Python hang when catching a segfault
type: crash
versions: Python 2.5

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1215>
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