[pypy-issue] [issue1194] ctypes callbacks don't respect SystemExit

Amaury Forgeot d Arc tracker at bugs.pypy.org
Thu Jun 28 20:11:56 CEST 2012

New submission from Amaury Forgeot d Arc <amauryfa at gmail.com>:

When a ctypes callback raises an exception, CPython uses PyErr_Print(), this has 
the effect of 
terminating the interpreter with a libc exit().

Yes, it's a bit abrupt, but some code relies on this behavior, and pypy should 
do the same.
Here is an example, with CPython the callback is called only once:

from ctypes import *
libc = CDLL("libc.so.6")   
qsort = libc.qsort
qsort.restype = None
def py_cmp_func(a, b):
    print "py_cmp_func", a, b
    raise SystemExit("exit!")
cmp_func = CMPFUNC(py_cmp_func)
ia = (c_int * 5)(5, 1, 7, 33, 99)
qsort(ia, len(ia), sizeof(c_int), cmp_func)

messages: 4511
nosy: afa, pypy-issue
priority: bug
status: unread
title: ctypes callbacks don't respect SystemExit

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