|
| 1 | +from ctypes import * |
| 2 | +import os |
| 3 | +import shutil |
| 4 | +import subprocess |
| 5 | +import sys |
| 6 | +import unittest |
| 7 | +import test.support |
| 8 | +from test.support import import_helper |
| 9 | +from test.support import os_helper |
| 10 | +from ctypes.util import find_library |
| 11 | + |
| 12 | +libc_name = None |
| 13 | + |
| 14 | +def setUpModule(): |
| 15 | + global libc_name |
| 16 | + if os.name == "nt": |
| 17 | + libc_name = find_library("c") |
| 18 | + elif sys.platform == "cygwin": |
| 19 | + libc_name = "cygwin1.dll" |
| 20 | + else: |
| 21 | + libc_name = find_library("c") |
| 22 | + |
| 23 | + if test.support.verbose: |
| 24 | + print("libc_name is", libc_name) |
| 25 | + |
| 26 | +class LoaderTest(unittest.TestCase): |
| 27 | + |
| 28 | + unknowndll = "xxrandomnamexx" |
| 29 | + |
| 30 | + def test_load(self): |
| 31 | + if libc_name is None: |
| 32 | + self.skipTest('could not find libc') |
| 33 | + CDLL(libc_name) |
| 34 | + CDLL(os.path.basename(libc_name)) |
| 35 | + self.assertRaises(OSError, CDLL, self.unknowndll) |
| 36 | + |
| 37 | + def test_load_version(self): |
| 38 | + if libc_name is None: |
| 39 | + self.skipTest('could not find libc') |
| 40 | + if os.path.basename(libc_name) != 'libc.so.6': |
| 41 | + self.skipTest('wrong libc path for test') |
| 42 | + cdll.LoadLibrary("libc.so.6") |
| 43 | + # linux uses version, libc 9 should not exist |
| 44 | + self.assertRaises(OSError, cdll.LoadLibrary, "libc.so.9") |
| 45 | + self.assertRaises(OSError, cdll.LoadLibrary, self.unknowndll) |
| 46 | + |
| 47 | + def test_find(self): |
| 48 | + for name in ("c", "m"): |
| 49 | + lib = find_library(name) |
| 50 | + if lib: |
| 51 | + cdll.LoadLibrary(lib) |
| 52 | + CDLL(lib) |
| 53 | + |
| 54 | + @unittest.skipUnless(os.name == "nt", |
| 55 | + 'test specific to Windows') |
| 56 | + def test_load_library(self): |
| 57 | + # CRT is no longer directly loadable. See issue23606 for the |
| 58 | + # discussion about alternative approaches. |
| 59 | + #self.assertIsNotNone(libc_name) |
| 60 | + if test.support.verbose: |
| 61 | + print(find_library("kernel32")) |
| 62 | + print(find_library("user32")) |
| 63 | + |
| 64 | + if os.name == "nt": |
| 65 | + windll.kernel32.GetModuleHandleW |
| 66 | + windll["kernel32"].GetModuleHandleW |
| 67 | + windll.LoadLibrary("kernel32").GetModuleHandleW |
| 68 | + WinDLL("kernel32").GetModuleHandleW |
| 69 | + # embedded null character |
| 70 | + self.assertRaises(ValueError, windll.LoadLibrary, "kernel32\0") |
| 71 | + |
| 72 | + @unittest.skipUnless(os.name == "nt", |
| 73 | + 'test specific to Windows') |
| 74 | + def test_load_ordinal_functions(self): |
| 75 | + import _ctypes_test |
| 76 | + dll = WinDLL(_ctypes_test.__file__) |
| 77 | + # We load the same function both via ordinal and name |
| 78 | + func_ord = dll[2] |
| 79 | + func_name = dll.GetString |
| 80 | + # addressof gets the address where the function pointer is stored |
| 81 | + a_ord = addressof(func_ord) |
| 82 | + a_name = addressof(func_name) |
| 83 | + f_ord_addr = c_void_p.from_address(a_ord).value |
| 84 | + f_name_addr = c_void_p.from_address(a_name).value |
| 85 | + self.assertEqual(hex(f_ord_addr), hex(f_name_addr)) |
| 86 | + |
| 87 | + self.assertRaises(AttributeError, dll.__getitem__, 1234) |
| 88 | + |
| 89 | + @unittest.skipUnless(os.name == "nt", 'Windows-specific test') |
| 90 | + def test_1703286_A(self): |
| 91 | + from _ctypes import LoadLibrary, FreeLibrary |
| 92 | + # On winXP 64-bit, advapi32 loads at an address that does |
| 93 | + # NOT fit into a 32-bit integer. FreeLibrary must be able |
| 94 | + # to accept this address. |
| 95 | + |
| 96 | + # These are tests for https://www.python.org/sf/1703286 |
| 97 | + handle = LoadLibrary("advapi32") |
| 98 | + FreeLibrary(handle) |
| 99 | + |
| 100 | + @unittest.skipUnless(os.name == "nt", 'Windows-specific test') |
| 101 | + def test_1703286_B(self): |
| 102 | + # Since on winXP 64-bit advapi32 loads like described |
| 103 | + # above, the (arbitrarily selected) CloseEventLog function |
| 104 | + # also has a high address. 'call_function' should accept |
| 105 | + # addresses so large. |
| 106 | + from _ctypes import call_function |
| 107 | + advapi32 = windll.advapi32 |
| 108 | + # Calling CloseEventLog with a NULL argument should fail, |
| 109 | + # but the call should not segfault or so. |
| 110 | + self.assertEqual(0, advapi32.CloseEventLog(None)) |
| 111 | + windll.kernel32.GetProcAddress.argtypes = c_void_p, c_char_p |
| 112 | + windll.kernel32.GetProcAddress.restype = c_void_p |
| 113 | + proc = windll.kernel32.GetProcAddress(advapi32._handle, |
| 114 | + b"CloseEventLog") |
| 115 | + self.assertTrue(proc) |
| 116 | + # This is the real test: call the function via 'call_function' |
| 117 | + self.assertEqual(0, call_function(proc, (None,))) |
| 118 | + |
| 119 | + @unittest.skipUnless(os.name == "nt", |
| 120 | + 'test specific to Windows') |
| 121 | + def test_load_hasattr(self): |
| 122 | + # bpo-34816: shouldn't raise OSError |
| 123 | + self.assertFalse(hasattr(windll, 'test')) |
| 124 | + |
| 125 | + @unittest.skipUnless(os.name == "nt", |
| 126 | + 'test specific to Windows') |
| 127 | + def test_load_dll_with_flags(self): |
| 128 | + _sqlite3 = import_helper.import_module("_sqlite3") |
| 129 | + src = _sqlite3.__file__ |
| 130 | + if src.lower().endswith("_d.pyd"): |
| 131 | + ext = "_d.dll" |
| 132 | + else: |
| 133 | + ext = ".dll" |
| 134 | + |
| 135 | + with os_helper.temp_dir() as tmp: |
| 136 | + # We copy two files and load _sqlite3.dll (formerly .pyd), |
| 137 | + # which has a dependency on sqlite3.dll. Then we test |
| 138 | + # loading it in subprocesses to avoid it starting in memory |
| 139 | + # for each test. |
| 140 | + target = os.path.join(tmp, "_sqlite3.dll") |
| 141 | + shutil.copy(src, target) |
| 142 | + shutil.copy(os.path.join(os.path.dirname(src), "sqlite3" + ext), |
| 143 | + os.path.join(tmp, "sqlite3" + ext)) |
| 144 | + |
| 145 | + def should_pass(command): |
| 146 | + with self.subTest(command): |
| 147 | + subprocess.check_output( |
| 148 | + [sys.executable, "-c", |
| 149 | + "from ctypes import *; import nt;" + command], |
| 150 | + cwd=tmp |
| 151 | + ) |
| 152 | + |
| 153 | + def should_fail(command): |
| 154 | + with self.subTest(command): |
| 155 | + with self.assertRaises(subprocess.CalledProcessError): |
| 156 | + subprocess.check_output( |
| 157 | + [sys.executable, "-c", |
| 158 | + "from ctypes import *; import nt;" + command], |
| 159 | + cwd=tmp, stderr=subprocess.STDOUT, |
| 160 | + ) |
| 161 | + |
| 162 | + # Default load should not find this in CWD |
| 163 | + should_fail("WinDLL('_sqlite3.dll')") |
| 164 | + |
| 165 | + # Relative path (but not just filename) should succeed |
| 166 | + should_pass("WinDLL('./_sqlite3.dll')") |
| 167 | + |
| 168 | + # Insecure load flags should succeed |
| 169 | + # Clear the DLL directory to avoid safe search settings propagating |
| 170 | + should_pass("windll.kernel32.SetDllDirectoryW(None); WinDLL('_sqlite3.dll', winmode=0)") |
| 171 | + |
| 172 | + # Full path load without DLL_LOAD_DIR shouldn't find dependency |
| 173 | + should_fail("WinDLL(nt._getfullpathname('_sqlite3.dll'), " + |
| 174 | + "winmode=nt._LOAD_LIBRARY_SEARCH_SYSTEM32)") |
| 175 | + |
| 176 | + # Full path load with DLL_LOAD_DIR should succeed |
| 177 | + should_pass("WinDLL(nt._getfullpathname('_sqlite3.dll'), " + |
| 178 | + "winmode=nt._LOAD_LIBRARY_SEARCH_SYSTEM32|" + |
| 179 | + "nt._LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR)") |
| 180 | + |
| 181 | + # User-specified directory should succeed |
| 182 | + should_pass("import os; p = os.add_dll_directory(os.getcwd());" + |
| 183 | + "WinDLL('_sqlite3.dll'); p.close()") |
| 184 | + |
| 185 | + |
| 186 | + |
| 187 | +if __name__ == "__main__": |
| 188 | + unittest.main() |
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