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from ctypes import *
import os
import sys
import unittest
import test.support
from ctypes.util import find_library
libc_name = None
def setUpModule():
global libc_name
if os.name == "nt":
libc_name = find_library("c")
elif os.name == "ce":
libc_name = "coredll"
elif sys.platform == "cygwin":
libc_name = "cygwin1.dll"
else:
libc_name = find_library("c")
if test.support.verbose:
print("libc_name is", libc_name)
class LoaderTest(unittest.TestCase):
unknowndll = "xxrandomnamexx"
def test_load(self):
if libc_name is None:
self.skipTest('could not find libc')
CDLL(libc_name)
CDLL(os.path.basename(libc_name))
self.assertRaises(OSError, CDLL, self.unknowndll)
def test_load_version(self):
if libc_name is None:
self.skipTest('could not find libc')
if os.path.basename(libc_name) != 'libc.so.6':
self.skipTest('wrong libc path for test')
cdll.LoadLibrary("libc.so.6")
# linux uses version, libc 9 should not exist
self.assertRaises(OSError, cdll.LoadLibrary, "libc.so.9")
self.assertRaises(OSError, cdll.LoadLibrary, self.unknowndll)
def test_find(self):
for name in ("c", "m"):
lib = find_library(name)
if lib:
cdll.LoadLibrary(lib)
CDLL(lib)
@unittest.skipUnless(os.name in ("nt", "ce"),
'test specific to Windows (NT/CE)')
def test_load_library(self):
# CRT is no longer directly loadable. See issue23606 for the
# discussion about alternative approaches.
#self.assertIsNotNone(libc_name)
if test.support.verbose:
print(find_library("kernel32"))
print(find_library("user32"))
if os.name == "nt":
windll.kernel32.GetModuleHandleW
windll["kernel32"].GetModuleHandleW
windll.LoadLibrary("kernel32").GetModuleHandleW
WinDLL("kernel32").GetModuleHandleW
elif os.name == "ce":
windll.coredll.GetModuleHandleW
windll["coredll"].GetModuleHandleW
windll.LoadLibrary("coredll").GetModuleHandleW
WinDLL("coredll").GetModuleHandleW
@unittest.skipUnless(os.name in ("nt", "ce"),
'test specific to Windows (NT/CE)')
def test_load_ordinal_functions(self):
import _ctypes_test
dll = WinDLL(_ctypes_test.__file__)
# We load the same function both via ordinal and name
func_ord = dll[2]
func_name = dll.GetString
# addressof gets the address where the function pointer is stored
a_ord = addressof(func_ord)
a_name = addressof(func_name)
f_ord_addr = c_void_p.from_address(a_ord).value
f_name_addr = c_void_p.from_address(a_name).value
self.assertEqual(hex(f_ord_addr), hex(f_name_addr))
self.assertRaises(AttributeError, dll.__getitem__, 1234)
@unittest.skipUnless(os.name == "nt", 'Windows-specific test')
def test_1703286_A(self):
from _ctypes import LoadLibrary, FreeLibrary
# On winXP 64-bit, advapi32 loads at an address that does
# NOT fit into a 32-bit integer. FreeLibrary must be able
# to accept this address.
# These are tests for http://www.python.org/sf/1703286
handle = LoadLibrary("advapi32")
FreeLibrary(handle)
@unittest.skipUnless(os.name == "nt", 'Windows-specific test')
def test_1703286_B(self):
# Since on winXP 64-bit advapi32 loads like described
# above, the (arbitrarily selected) CloseEventLog function
# also has a high address. 'call_function' should accept
# addresses so large.
from _ctypes import call_function
advapi32 = windll.advapi32
# Calling CloseEventLog with a NULL argument should fail,
# but the call should not segfault or so.
self.assertEqual(0, advapi32.CloseEventLog(None))
windll.kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
windll.kernel32.GetProcAddress.restype = c_void_p
proc = windll.kernel32.GetProcAddress(advapi32._handle,
b"CloseEventLog")
self.assertTrue(proc)
# This is the real test: call the function via 'call_function'
self.assertEqual(0, call_function(proc, (None,)))
if __name__ == "__main__":
unittest.main()
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