Antoine Pitrou | 4c8ce84 | 2013-09-01 19:51:49 +0200 | [diff] [blame] | 1 | """ |
| 2 | Tests for the threading module. |
| 3 | """ |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 4 | |
Benjamin Peterson | ee8712c | 2008-05-20 21:35:26 +0000 | [diff] [blame] | 5 | import test.support |
Serhiy Storchaka | a793037 | 2016-07-03 22:27:26 +0300 | [diff] [blame] | 6 | from test.support import (verbose, import_module, cpython_only, |
| 7 | requires_type_collecting) |
Berker Peksag | ce64391 | 2015-05-06 06:33:17 +0300 | [diff] [blame] | 8 | from test.support.script_helper import assert_python_ok, assert_python_failure |
Antoine Pitrou | 8e6e0fd | 2012-04-19 23:55:01 +0200 | [diff] [blame] | 9 | |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 10 | import random |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 11 | import sys |
Antoine Pitrou | a6a4dc8 | 2017-09-07 18:56:24 +0200 | [diff] [blame] | 12 | import _thread |
| 13 | import threading |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 14 | import time |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 15 | import unittest |
Christian Heimes | d3eb5a15 | 2008-02-24 00:38:49 +0000 | [diff] [blame] | 16 | import weakref |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 17 | import os |
Gregory P. Smith | 4b129d2 | 2011-01-04 00:51:50 +0000 | [diff] [blame] | 18 | import subprocess |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 19 | |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 20 | from test import lock_tests |
Martin Panter | 19e69c5 | 2015-11-14 12:46:42 +0000 | [diff] [blame] | 21 | from test import support |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 22 | |
Andrew Svetlov | 58b5c5a | 2013-09-04 07:01:07 +0300 | [diff] [blame] | 23 | |
| 24 | # Between fork() and exec(), only async-safe functions are allowed (issues |
| 25 | # #12316 and #11870), and fork() from a worker thread is known to trigger |
| 26 | # problems with some operating systems (issue #3863): skip problematic tests |
| 27 | # on platforms known to behave badly. |
| 28 | platforms_to_skip = ('freebsd4', 'freebsd5', 'freebsd6', 'netbsd5', |
| 29 | 'hp-ux11') |
| 30 | |
| 31 | |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 32 | # A trivial mutable counter. |
| 33 | class Counter(object): |
| 34 | def __init__(self): |
| 35 | self.value = 0 |
| 36 | def inc(self): |
| 37 | self.value += 1 |
| 38 | def dec(self): |
| 39 | self.value -= 1 |
| 40 | def get(self): |
| 41 | return self.value |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 42 | |
| 43 | class TestThread(threading.Thread): |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 44 | def __init__(self, name, testcase, sema, mutex, nrunning): |
| 45 | threading.Thread.__init__(self, name=name) |
| 46 | self.testcase = testcase |
| 47 | self.sema = sema |
| 48 | self.mutex = mutex |
| 49 | self.nrunning = nrunning |
| 50 | |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 51 | def run(self): |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 52 | delay = random.random() / 10000.0 |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 53 | if verbose: |
Jeffrey Yasskin | ca67412 | 2008-03-29 05:06:52 +0000 | [diff] [blame] | 54 | print('task %s will run for %.1f usec' % |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 55 | (self.name, delay * 1e6)) |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 56 | |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 57 | with self.sema: |
| 58 | with self.mutex: |
| 59 | self.nrunning.inc() |
| 60 | if verbose: |
| 61 | print(self.nrunning.get(), 'tasks are running') |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 62 | self.testcase.assertLessEqual(self.nrunning.get(), 3) |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 63 | |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 64 | time.sleep(delay) |
| 65 | if verbose: |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 66 | print('task', self.name, 'done') |
Benjamin Peterson | 672b803 | 2008-06-11 19:14:14 +0000 | [diff] [blame] | 67 | |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 68 | with self.mutex: |
| 69 | self.nrunning.dec() |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 70 | self.testcase.assertGreaterEqual(self.nrunning.get(), 0) |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 71 | if verbose: |
| 72 | print('%s is finished. %d tasks are running' % |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 73 | (self.name, self.nrunning.get())) |
Benjamin Peterson | 672b803 | 2008-06-11 19:14:14 +0000 | [diff] [blame] | 74 | |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 75 | |
Antoine Pitrou | b0e9bd4 | 2009-10-27 20:05:26 +0000 | [diff] [blame] | 76 | class BaseTestCase(unittest.TestCase): |
| 77 | def setUp(self): |
| 78 | self._threads = test.support.threading_setup() |
| 79 | |
| 80 | def tearDown(self): |
| 81 | test.support.threading_cleanup(*self._threads) |
| 82 | test.support.reap_children() |
| 83 | |
| 84 | |
| 85 | class ThreadTests(BaseTestCase): |
Skip Montanaro | 4533f60 | 2001-08-20 20:28:48 +0000 | [diff] [blame] | 86 | |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 87 | # Create a bunch of threads, let each do some work, wait until all are |
| 88 | # done. |
| 89 | def test_various_ops(self): |
| 90 | # This takes about n/3 seconds to run (about n/3 clumps of tasks, |
| 91 | # times about 1 second per clump). |
| 92 | NUMTASKS = 10 |
| 93 | |
| 94 | # no more than 3 of the 10 can run at once |
| 95 | sema = threading.BoundedSemaphore(value=3) |
| 96 | mutex = threading.RLock() |
| 97 | numrunning = Counter() |
| 98 | |
| 99 | threads = [] |
| 100 | |
| 101 | for i in range(NUMTASKS): |
| 102 | t = TestThread("<thread %d>"%i, self, sema, mutex, numrunning) |
| 103 | threads.append(t) |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 104 | self.assertIsNone(t.ident) |
| 105 | self.assertRegex(repr(t), r'^<TestThread\(.*, initial\)>$') |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 106 | t.start() |
| 107 | |
| 108 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 109 | print('waiting for all tasks to complete') |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 110 | for t in threads: |
Antoine Pitrou | 5da7e79 | 2013-09-08 13:19:06 +0200 | [diff] [blame] | 111 | t.join() |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 112 | self.assertFalse(t.is_alive()) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 113 | self.assertNotEqual(t.ident, 0) |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 114 | self.assertIsNotNone(t.ident) |
| 115 | self.assertRegex(repr(t), r'^<TestThread\(.*, stopped -?\d+\)>$') |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 116 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 117 | print('all tasks done') |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 118 | self.assertEqual(numrunning.get(), 0) |
| 119 | |
Benjamin Peterson | d23f822 | 2009-04-05 19:13:16 +0000 | [diff] [blame] | 120 | def test_ident_of_no_threading_threads(self): |
| 121 | # The ident still must work for the main thread and dummy threads. |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 122 | self.assertIsNotNone(threading.currentThread().ident) |
Benjamin Peterson | d23f822 | 2009-04-05 19:13:16 +0000 | [diff] [blame] | 123 | def f(): |
| 124 | ident.append(threading.currentThread().ident) |
| 125 | done.set() |
| 126 | done = threading.Event() |
| 127 | ident = [] |
Victor Stinner | ff40ecd | 2017-09-14 13:07:24 -0700 | [diff] [blame] | 128 | with support.wait_threads_exit(): |
| 129 | tid = _thread.start_new_thread(f, ()) |
| 130 | done.wait() |
| 131 | self.assertEqual(ident[0], tid) |
Antoine Pitrou | ca13a0d | 2009-11-08 00:30:04 +0000 | [diff] [blame] | 132 | # Kill the "immortal" _DummyThread |
| 133 | del threading._active[ident[0]] |
Benjamin Peterson | d23f822 | 2009-04-05 19:13:16 +0000 | [diff] [blame] | 134 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 135 | # run with a small(ish) thread stack size (256kB) |
| 136 | def test_various_ops_small_stack(self): |
| 137 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 138 | print('with 256kB thread stack size...') |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 139 | try: |
| 140 | threading.stack_size(262144) |
Georg Brandl | 2067bfd | 2008-05-25 13:05:15 +0000 | [diff] [blame] | 141 | except _thread.error: |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 142 | raise unittest.SkipTest( |
| 143 | 'platform does not support changing thread stack size') |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 144 | self.test_various_ops() |
| 145 | threading.stack_size(0) |
| 146 | |
| 147 | # run with a large thread stack size (1MB) |
| 148 | def test_various_ops_large_stack(self): |
| 149 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 150 | print('with 1MB thread stack size...') |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 151 | try: |
| 152 | threading.stack_size(0x100000) |
Georg Brandl | 2067bfd | 2008-05-25 13:05:15 +0000 | [diff] [blame] | 153 | except _thread.error: |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 154 | raise unittest.SkipTest( |
| 155 | 'platform does not support changing thread stack size') |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 156 | self.test_various_ops() |
| 157 | threading.stack_size(0) |
| 158 | |
Tim Peters | 711906e | 2005-01-08 07:30:42 +0000 | [diff] [blame] | 159 | def test_foreign_thread(self): |
| 160 | # Check that a "foreign" thread can use the threading module. |
| 161 | def f(mutex): |
Antoine Pitrou | b087268 | 2009-11-09 16:08:16 +0000 | [diff] [blame] | 162 | # Calling current_thread() forces an entry for the foreign |
Tim Peters | 711906e | 2005-01-08 07:30:42 +0000 | [diff] [blame] | 163 | # thread to get made in the threading._active map. |
Antoine Pitrou | b087268 | 2009-11-09 16:08:16 +0000 | [diff] [blame] | 164 | threading.current_thread() |
Tim Peters | 711906e | 2005-01-08 07:30:42 +0000 | [diff] [blame] | 165 | mutex.release() |
| 166 | |
| 167 | mutex = threading.Lock() |
| 168 | mutex.acquire() |
Victor Stinner | ff40ecd | 2017-09-14 13:07:24 -0700 | [diff] [blame] | 169 | with support.wait_threads_exit(): |
| 170 | tid = _thread.start_new_thread(f, (mutex,)) |
| 171 | # Wait for the thread to finish. |
| 172 | mutex.acquire() |
Benjamin Peterson | 577473f | 2010-01-19 00:09:57 +0000 | [diff] [blame] | 173 | self.assertIn(tid, threading._active) |
Ezio Melotti | e961593 | 2010-01-24 19:26:24 +0000 | [diff] [blame] | 174 | self.assertIsInstance(threading._active[tid], threading._DummyThread) |
Xiang Zhang | f3a9fab | 2017-02-27 11:01:30 +0800 | [diff] [blame] | 175 | #Issue 29376 |
| 176 | self.assertTrue(threading._active[tid].is_alive()) |
| 177 | self.assertRegex(repr(threading._active[tid]), '_DummyThread') |
Tim Peters | 711906e | 2005-01-08 07:30:42 +0000 | [diff] [blame] | 178 | del threading._active[tid] |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 179 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 180 | # PyThreadState_SetAsyncExc() is a CPython-only gimmick, not (currently) |
| 181 | # exposed at the Python level. This test relies on ctypes to get at it. |
| 182 | def test_PyThreadState_SetAsyncExc(self): |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 183 | ctypes = import_module("ctypes") |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 184 | |
| 185 | set_async_exc = ctypes.pythonapi.PyThreadState_SetAsyncExc |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 186 | set_async_exc.argtypes = (ctypes.c_ulong, ctypes.py_object) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 187 | |
| 188 | class AsyncExc(Exception): |
| 189 | pass |
| 190 | |
| 191 | exception = ctypes.py_object(AsyncExc) |
| 192 | |
Antoine Pitrou | be4d809 | 2009-10-18 18:27:17 +0000 | [diff] [blame] | 193 | # First check it works when setting the exception from the same thread. |
Victor Stinner | 2a12974 | 2011-05-30 23:02:52 +0200 | [diff] [blame] | 194 | tid = threading.get_ident() |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 195 | self.assertIsInstance(tid, int) |
| 196 | self.assertGreater(tid, 0) |
Antoine Pitrou | be4d809 | 2009-10-18 18:27:17 +0000 | [diff] [blame] | 197 | |
| 198 | try: |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 199 | result = set_async_exc(tid, exception) |
Antoine Pitrou | be4d809 | 2009-10-18 18:27:17 +0000 | [diff] [blame] | 200 | # The exception is async, so we might have to keep the VM busy until |
| 201 | # it notices. |
| 202 | while True: |
| 203 | pass |
| 204 | except AsyncExc: |
| 205 | pass |
| 206 | else: |
Benjamin Peterson | a0dfa82 | 2009-11-13 02:25:08 +0000 | [diff] [blame] | 207 | # This code is unreachable but it reflects the intent. If we wanted |
| 208 | # to be smarter the above loop wouldn't be infinite. |
Antoine Pitrou | be4d809 | 2009-10-18 18:27:17 +0000 | [diff] [blame] | 209 | self.fail("AsyncExc not raised") |
| 210 | try: |
| 211 | self.assertEqual(result, 1) # one thread state modified |
| 212 | except UnboundLocalError: |
Benjamin Peterson | a0dfa82 | 2009-11-13 02:25:08 +0000 | [diff] [blame] | 213 | # The exception was raised too quickly for us to get the result. |
Antoine Pitrou | be4d809 | 2009-10-18 18:27:17 +0000 | [diff] [blame] | 214 | pass |
| 215 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 216 | # `worker_started` is set by the thread when it's inside a try/except |
| 217 | # block waiting to catch the asynchronously set AsyncExc exception. |
| 218 | # `worker_saw_exception` is set by the thread upon catching that |
| 219 | # exception. |
| 220 | worker_started = threading.Event() |
| 221 | worker_saw_exception = threading.Event() |
| 222 | |
| 223 | class Worker(threading.Thread): |
| 224 | def run(self): |
Victor Stinner | 2a12974 | 2011-05-30 23:02:52 +0200 | [diff] [blame] | 225 | self.id = threading.get_ident() |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 226 | self.finished = False |
| 227 | |
| 228 | try: |
| 229 | while True: |
| 230 | worker_started.set() |
| 231 | time.sleep(0.1) |
| 232 | except AsyncExc: |
| 233 | self.finished = True |
| 234 | worker_saw_exception.set() |
| 235 | |
| 236 | t = Worker() |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 237 | t.daemon = True # so if this fails, we don't hang Python at shutdown |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 238 | t.start() |
| 239 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 240 | print(" started worker thread") |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 241 | |
| 242 | # Try a thread id that doesn't make sense. |
| 243 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 244 | print(" trying nonsensical thread id") |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 245 | result = set_async_exc(-1, exception) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 246 | self.assertEqual(result, 0) # no thread states modified |
| 247 | |
| 248 | # Now raise an exception in the worker thread. |
| 249 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 250 | print(" waiting for worker thread to get started") |
Benjamin Peterson | d23f822 | 2009-04-05 19:13:16 +0000 | [diff] [blame] | 251 | ret = worker_started.wait() |
| 252 | self.assertTrue(ret) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 253 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 254 | print(" verifying worker hasn't exited") |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 255 | self.assertFalse(t.finished) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 256 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 257 | print(" attempting to raise asynch exception in worker") |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 258 | result = set_async_exc(t.id, exception) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 259 | self.assertEqual(result, 1) # one thread state modified |
| 260 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 261 | print(" waiting for worker to say it caught the exception") |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 262 | worker_saw_exception.wait(timeout=10) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 263 | self.assertTrue(t.finished) |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 264 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 265 | print(" all OK -- joining worker") |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 266 | if t.finished: |
| 267 | t.join() |
| 268 | # else the thread is still running, and we have no way to kill it |
| 269 | |
Gregory P. Smith | 3fdd964 | 2010-02-28 18:57:46 +0000 | [diff] [blame] | 270 | def test_limbo_cleanup(self): |
| 271 | # Issue 7481: Failure to start thread should cleanup the limbo map. |
| 272 | def fail_new_thread(*args): |
| 273 | raise threading.ThreadError() |
| 274 | _start_new_thread = threading._start_new_thread |
| 275 | threading._start_new_thread = fail_new_thread |
| 276 | try: |
| 277 | t = threading.Thread(target=lambda: None) |
Gregory P. Smith | f50f168 | 2010-03-01 03:13:36 +0000 | [diff] [blame] | 278 | self.assertRaises(threading.ThreadError, t.start) |
| 279 | self.assertFalse( |
| 280 | t in threading._limbo, |
| 281 | "Failed to cleanup _limbo map on failure of Thread.start().") |
Gregory P. Smith | 3fdd964 | 2010-02-28 18:57:46 +0000 | [diff] [blame] | 282 | finally: |
| 283 | threading._start_new_thread = _start_new_thread |
| 284 | |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 285 | def test_finalize_runnning_thread(self): |
| 286 | # Issue 1402: the PyGILState_Ensure / _Release functions may be called |
| 287 | # very late on python exit: on deallocation of a running thread for |
| 288 | # example. |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 289 | import_module("ctypes") |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 290 | |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 291 | rc, out, err = assert_python_failure("-c", """if 1: |
Georg Brandl | 2067bfd | 2008-05-25 13:05:15 +0000 | [diff] [blame] | 292 | import ctypes, sys, time, _thread |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 293 | |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 294 | # This lock is used as a simple event variable. |
Georg Brandl | 2067bfd | 2008-05-25 13:05:15 +0000 | [diff] [blame] | 295 | ready = _thread.allocate_lock() |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 296 | ready.acquire() |
| 297 | |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 298 | # Module globals are cleared before __del__ is run |
| 299 | # So we save the functions in class dict |
| 300 | class C: |
| 301 | ensure = ctypes.pythonapi.PyGILState_Ensure |
| 302 | release = ctypes.pythonapi.PyGILState_Release |
| 303 | def __del__(self): |
| 304 | state = self.ensure() |
| 305 | self.release(state) |
| 306 | |
| 307 | def waitingThread(): |
| 308 | x = C() |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 309 | ready.release() |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 310 | time.sleep(100) |
| 311 | |
Georg Brandl | 2067bfd | 2008-05-25 13:05:15 +0000 | [diff] [blame] | 312 | _thread.start_new_thread(waitingThread, ()) |
Christian Heimes | 4fbc72b | 2008-03-22 00:47:35 +0000 | [diff] [blame] | 313 | ready.acquire() # Be sure the other thread is waiting. |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 314 | sys.exit(42) |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 315 | """) |
Christian Heimes | 7d2ff88 | 2007-11-30 14:35:04 +0000 | [diff] [blame] | 316 | self.assertEqual(rc, 42) |
| 317 | |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 318 | def test_finalize_with_trace(self): |
| 319 | # Issue1733757 |
| 320 | # Avoid a deadlock when sys.settrace steps into threading._shutdown |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 321 | assert_python_ok("-c", """if 1: |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 322 | import sys, threading |
| 323 | |
| 324 | # A deadlock-killer, to prevent the |
| 325 | # testsuite to hang forever |
| 326 | def killer(): |
| 327 | import os, time |
| 328 | time.sleep(2) |
| 329 | print('program blocked; aborting') |
| 330 | os._exit(2) |
| 331 | t = threading.Thread(target=killer) |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 332 | t.daemon = True |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 333 | t.start() |
| 334 | |
| 335 | # This is the trace function |
| 336 | def func(frame, event, arg): |
Benjamin Peterson | 672b803 | 2008-06-11 19:14:14 +0000 | [diff] [blame] | 337 | threading.current_thread() |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 338 | return func |
| 339 | |
| 340 | sys.settrace(func) |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 341 | """) |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 342 | |
Antoine Pitrou | 011bd62 | 2009-10-20 21:52:47 +0000 | [diff] [blame] | 343 | def test_join_nondaemon_on_shutdown(self): |
| 344 | # Issue 1722344 |
| 345 | # Raising SystemExit skipped threading._shutdown |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 346 | rc, out, err = assert_python_ok("-c", """if 1: |
Antoine Pitrou | 011bd62 | 2009-10-20 21:52:47 +0000 | [diff] [blame] | 347 | import threading |
| 348 | from time import sleep |
| 349 | |
| 350 | def child(): |
| 351 | sleep(1) |
| 352 | # As a non-daemon thread we SHOULD wake up and nothing |
| 353 | # should be torn down yet |
| 354 | print("Woke up, sleep function is:", sleep) |
| 355 | |
| 356 | threading.Thread(target=child).start() |
| 357 | raise SystemExit |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 358 | """) |
| 359 | self.assertEqual(out.strip(), |
Antoine Pitrou | 899d1c6 | 2009-10-23 21:55:36 +0000 | [diff] [blame] | 360 | b"Woke up, sleep function is: <built-in function sleep>") |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 361 | self.assertEqual(err, b"") |
Neal Norwitz | f5c7c2e | 2008-04-05 04:47:45 +0000 | [diff] [blame] | 362 | |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 363 | def test_enumerate_after_join(self): |
| 364 | # Try hard to trigger #1703448: a thread is still returned in |
| 365 | # threading.enumerate() after it has been join()ed. |
| 366 | enum = threading.enumerate |
Antoine Pitrou | c3b0757 | 2009-11-13 22:19:19 +0000 | [diff] [blame] | 367 | old_interval = sys.getswitchinterval() |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 368 | try: |
Jeffrey Yasskin | ca67412 | 2008-03-29 05:06:52 +0000 | [diff] [blame] | 369 | for i in range(1, 100): |
Antoine Pitrou | c3b0757 | 2009-11-13 22:19:19 +0000 | [diff] [blame] | 370 | sys.setswitchinterval(i * 0.0002) |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 371 | t = threading.Thread(target=lambda: None) |
| 372 | t.start() |
| 373 | t.join() |
| 374 | l = enum() |
Ezio Melotti | b58e0bd | 2010-01-23 15:40:09 +0000 | [diff] [blame] | 375 | self.assertNotIn(t, l, |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 376 | "#1703448 triggered after %d trials: %s" % (i, l)) |
| 377 | finally: |
Antoine Pitrou | c3b0757 | 2009-11-13 22:19:19 +0000 | [diff] [blame] | 378 | sys.setswitchinterval(old_interval) |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 379 | |
Christian Heimes | d3eb5a15 | 2008-02-24 00:38:49 +0000 | [diff] [blame] | 380 | def test_no_refcycle_through_target(self): |
| 381 | class RunSelfFunction(object): |
| 382 | def __init__(self, should_raise): |
| 383 | # The links in this refcycle from Thread back to self |
| 384 | # should be cleaned up when the thread completes. |
| 385 | self.should_raise = should_raise |
| 386 | self.thread = threading.Thread(target=self._run, |
| 387 | args=(self,), |
| 388 | kwargs={'yet_another':self}) |
| 389 | self.thread.start() |
| 390 | |
| 391 | def _run(self, other_ref, yet_another): |
| 392 | if self.should_raise: |
| 393 | raise SystemExit |
| 394 | |
| 395 | cyclic_object = RunSelfFunction(should_raise=False) |
| 396 | weak_cyclic_object = weakref.ref(cyclic_object) |
| 397 | cyclic_object.thread.join() |
| 398 | del cyclic_object |
Raymond Hettinger | 7beae8a | 2011-01-06 05:34:17 +0000 | [diff] [blame] | 399 | self.assertIsNone(weak_cyclic_object(), |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 400 | msg=('%d references still around' % |
| 401 | sys.getrefcount(weak_cyclic_object()))) |
Christian Heimes | d3eb5a15 | 2008-02-24 00:38:49 +0000 | [diff] [blame] | 402 | |
| 403 | raising_cyclic_object = RunSelfFunction(should_raise=True) |
| 404 | weak_raising_cyclic_object = weakref.ref(raising_cyclic_object) |
| 405 | raising_cyclic_object.thread.join() |
| 406 | del raising_cyclic_object |
Raymond Hettinger | 7beae8a | 2011-01-06 05:34:17 +0000 | [diff] [blame] | 407 | self.assertIsNone(weak_raising_cyclic_object(), |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 408 | msg=('%d references still around' % |
| 409 | sys.getrefcount(weak_raising_cyclic_object()))) |
Christian Heimes | d3eb5a15 | 2008-02-24 00:38:49 +0000 | [diff] [blame] | 410 | |
Benjamin Peterson | b3085c9 | 2008-09-01 23:09:31 +0000 | [diff] [blame] | 411 | def test_old_threading_api(self): |
| 412 | # Just a quick sanity check to make sure the old method names are |
| 413 | # still present |
Benjamin Peterson | f0923f5 | 2008-08-18 22:10:13 +0000 | [diff] [blame] | 414 | t = threading.Thread() |
Benjamin Peterson | b3085c9 | 2008-09-01 23:09:31 +0000 | [diff] [blame] | 415 | t.isDaemon() |
| 416 | t.setDaemon(True) |
| 417 | t.getName() |
| 418 | t.setName("name") |
| 419 | t.isAlive() |
| 420 | e = threading.Event() |
| 421 | e.isSet() |
| 422 | threading.activeCount() |
Benjamin Peterson | f0923f5 | 2008-08-18 22:10:13 +0000 | [diff] [blame] | 423 | |
Brian Curtin | 81a4a6a | 2010-07-23 16:30:10 +0000 | [diff] [blame] | 424 | def test_repr_daemon(self): |
| 425 | t = threading.Thread() |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 426 | self.assertNotIn('daemon', repr(t)) |
Brian Curtin | 81a4a6a | 2010-07-23 16:30:10 +0000 | [diff] [blame] | 427 | t.daemon = True |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 428 | self.assertIn('daemon', repr(t)) |
Brett Cannon | 3f5f226 | 2010-07-23 15:50:52 +0000 | [diff] [blame] | 429 | |
Antoine Pitrou | 0bd4deb | 2011-02-25 22:07:43 +0000 | [diff] [blame] | 430 | def test_deamon_param(self): |
| 431 | t = threading.Thread() |
| 432 | self.assertFalse(t.daemon) |
| 433 | t = threading.Thread(daemon=False) |
| 434 | self.assertFalse(t.daemon) |
| 435 | t = threading.Thread(daemon=True) |
| 436 | self.assertTrue(t.daemon) |
| 437 | |
Antoine Pitrou | 8e6e0fd | 2012-04-19 23:55:01 +0200 | [diff] [blame] | 438 | @unittest.skipUnless(hasattr(os, 'fork'), 'test needs fork()') |
| 439 | def test_dummy_thread_after_fork(self): |
| 440 | # Issue #14308: a dummy thread in the active list doesn't mess up |
| 441 | # the after-fork mechanism. |
| 442 | code = """if 1: |
| 443 | import _thread, threading, os, time |
| 444 | |
| 445 | def background_thread(evt): |
| 446 | # Creates and registers the _DummyThread instance |
| 447 | threading.current_thread() |
| 448 | evt.set() |
| 449 | time.sleep(10) |
| 450 | |
| 451 | evt = threading.Event() |
| 452 | _thread.start_new_thread(background_thread, (evt,)) |
| 453 | evt.wait() |
| 454 | assert threading.active_count() == 2, threading.active_count() |
| 455 | if os.fork() == 0: |
| 456 | assert threading.active_count() == 1, threading.active_count() |
| 457 | os._exit(0) |
| 458 | else: |
| 459 | os.wait() |
| 460 | """ |
| 461 | _, out, err = assert_python_ok("-c", code) |
| 462 | self.assertEqual(out, b'') |
| 463 | self.assertEqual(err, b'') |
| 464 | |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 465 | @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()") |
| 466 | def test_is_alive_after_fork(self): |
| 467 | # Try hard to trigger #18418: is_alive() could sometimes be True on |
| 468 | # threads that vanished after a fork. |
| 469 | old_interval = sys.getswitchinterval() |
| 470 | self.addCleanup(sys.setswitchinterval, old_interval) |
| 471 | |
| 472 | # Make the bug more likely to manifest. |
Xavier de Gaye | cb9ab0f | 2016-12-08 12:21:00 +0100 | [diff] [blame] | 473 | test.support.setswitchinterval(1e-6) |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 474 | |
| 475 | for i in range(20): |
| 476 | t = threading.Thread(target=lambda: None) |
| 477 | t.start() |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 478 | pid = os.fork() |
| 479 | if pid == 0: |
Victor Stinner | f8d05b3 | 2017-05-17 11:58:50 -0700 | [diff] [blame] | 480 | os._exit(11 if t.is_alive() else 10) |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 481 | else: |
Victor Stinner | f8d05b3 | 2017-05-17 11:58:50 -0700 | [diff] [blame] | 482 | t.join() |
| 483 | |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 484 | pid, status = os.waitpid(pid, 0) |
Victor Stinner | f8d05b3 | 2017-05-17 11:58:50 -0700 | [diff] [blame] | 485 | self.assertTrue(os.WIFEXITED(status)) |
| 486 | self.assertEqual(10, os.WEXITSTATUS(status)) |
Charles-François Natali | 9939cc8 | 2013-08-30 23:32:53 +0200 | [diff] [blame] | 487 | |
Andrew Svetlov | 58b5c5a | 2013-09-04 07:01:07 +0300 | [diff] [blame] | 488 | def test_main_thread(self): |
| 489 | main = threading.main_thread() |
| 490 | self.assertEqual(main.name, 'MainThread') |
| 491 | self.assertEqual(main.ident, threading.current_thread().ident) |
| 492 | self.assertEqual(main.ident, threading.get_ident()) |
| 493 | |
| 494 | def f(): |
| 495 | self.assertNotEqual(threading.main_thread().ident, |
| 496 | threading.current_thread().ident) |
| 497 | th = threading.Thread(target=f) |
| 498 | th.start() |
| 499 | th.join() |
| 500 | |
| 501 | @unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()") |
| 502 | @unittest.skipUnless(hasattr(os, 'waitpid'), "test needs os.waitpid()") |
| 503 | def test_main_thread_after_fork(self): |
| 504 | code = """if 1: |
| 505 | import os, threading |
| 506 | |
| 507 | pid = os.fork() |
| 508 | if pid == 0: |
| 509 | main = threading.main_thread() |
| 510 | print(main.name) |
| 511 | print(main.ident == threading.current_thread().ident) |
| 512 | print(main.ident == threading.get_ident()) |
| 513 | else: |
| 514 | os.waitpid(pid, 0) |
| 515 | """ |
| 516 | _, out, err = assert_python_ok("-c", code) |
| 517 | data = out.decode().replace('\r', '') |
| 518 | self.assertEqual(err, b"") |
| 519 | self.assertEqual(data, "MainThread\nTrue\nTrue\n") |
| 520 | |
| 521 | @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug") |
| 522 | @unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()") |
| 523 | @unittest.skipUnless(hasattr(os, 'waitpid'), "test needs os.waitpid()") |
| 524 | def test_main_thread_after_fork_from_nonmain_thread(self): |
| 525 | code = """if 1: |
| 526 | import os, threading, sys |
| 527 | |
| 528 | def f(): |
| 529 | pid = os.fork() |
| 530 | if pid == 0: |
| 531 | main = threading.main_thread() |
| 532 | print(main.name) |
| 533 | print(main.ident == threading.current_thread().ident) |
| 534 | print(main.ident == threading.get_ident()) |
| 535 | # stdout is fully buffered because not a tty, |
| 536 | # we have to flush before exit. |
| 537 | sys.stdout.flush() |
| 538 | else: |
| 539 | os.waitpid(pid, 0) |
| 540 | |
| 541 | th = threading.Thread(target=f) |
| 542 | th.start() |
| 543 | th.join() |
| 544 | """ |
| 545 | _, out, err = assert_python_ok("-c", code) |
| 546 | data = out.decode().replace('\r', '') |
| 547 | self.assertEqual(err, b"") |
| 548 | self.assertEqual(data, "Thread-1\nTrue\nTrue\n") |
| 549 | |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 550 | def test_tstate_lock(self): |
| 551 | # Test an implementation detail of Thread objects. |
| 552 | started = _thread.allocate_lock() |
| 553 | finish = _thread.allocate_lock() |
| 554 | started.acquire() |
| 555 | finish.acquire() |
| 556 | def f(): |
| 557 | started.release() |
| 558 | finish.acquire() |
| 559 | time.sleep(0.01) |
| 560 | # The tstate lock is None until the thread is started |
| 561 | t = threading.Thread(target=f) |
| 562 | self.assertIs(t._tstate_lock, None) |
| 563 | t.start() |
| 564 | started.acquire() |
| 565 | self.assertTrue(t.is_alive()) |
| 566 | # The tstate lock can't be acquired when the thread is running |
| 567 | # (or suspended). |
| 568 | tstate_lock = t._tstate_lock |
| 569 | self.assertFalse(tstate_lock.acquire(timeout=0), False) |
| 570 | finish.release() |
| 571 | # When the thread ends, the state_lock can be successfully |
| 572 | # acquired. |
| 573 | self.assertTrue(tstate_lock.acquire(timeout=5), False) |
| 574 | # But is_alive() is still True: we hold _tstate_lock now, which |
| 575 | # prevents is_alive() from knowing the thread's end-of-life C code |
| 576 | # is done. |
| 577 | self.assertTrue(t.is_alive()) |
| 578 | # Let is_alive() find out the C code is done. |
| 579 | tstate_lock.release() |
| 580 | self.assertFalse(t.is_alive()) |
| 581 | # And verify the thread disposed of _tstate_lock. |
Serhiy Storchaka | 8c0f0c5 | 2016-03-14 10:28:59 +0200 | [diff] [blame] | 582 | self.assertIsNone(t._tstate_lock) |
Victor Stinner | b8c7be2 | 2017-09-14 13:05:21 -0700 | [diff] [blame] | 583 | t.join() |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 584 | |
Tim Peters | 72460fa | 2013-09-09 18:48:24 -0500 | [diff] [blame] | 585 | def test_repr_stopped(self): |
| 586 | # Verify that "stopped" shows up in repr(Thread) appropriately. |
| 587 | started = _thread.allocate_lock() |
| 588 | finish = _thread.allocate_lock() |
| 589 | started.acquire() |
| 590 | finish.acquire() |
| 591 | def f(): |
| 592 | started.release() |
| 593 | finish.acquire() |
| 594 | t = threading.Thread(target=f) |
| 595 | t.start() |
| 596 | started.acquire() |
| 597 | self.assertIn("started", repr(t)) |
| 598 | finish.release() |
| 599 | # "stopped" should appear in the repr in a reasonable amount of time. |
| 600 | # Implementation detail: as of this writing, that's trivially true |
| 601 | # if .join() is called, and almost trivially true if .is_alive() is |
| 602 | # called. The detail we're testing here is that "stopped" shows up |
| 603 | # "all on its own". |
| 604 | LOOKING_FOR = "stopped" |
| 605 | for i in range(500): |
| 606 | if LOOKING_FOR in repr(t): |
| 607 | break |
| 608 | time.sleep(0.01) |
| 609 | self.assertIn(LOOKING_FOR, repr(t)) # we waited at least 5 seconds |
Victor Stinner | b8c7be2 | 2017-09-14 13:05:21 -0700 | [diff] [blame] | 610 | t.join() |
Christian Heimes | 1af737c | 2008-01-23 08:24:23 +0000 | [diff] [blame] | 611 | |
Tim Peters | 7634e1c | 2013-10-08 20:55:51 -0500 | [diff] [blame] | 612 | def test_BoundedSemaphore_limit(self): |
Tim Peters | 3d1b7a0 | 2013-10-08 21:29:27 -0500 | [diff] [blame] | 613 | # BoundedSemaphore should raise ValueError if released too often. |
| 614 | for limit in range(1, 10): |
| 615 | bs = threading.BoundedSemaphore(limit) |
| 616 | threads = [threading.Thread(target=bs.acquire) |
| 617 | for _ in range(limit)] |
| 618 | for t in threads: |
| 619 | t.start() |
| 620 | for t in threads: |
| 621 | t.join() |
| 622 | threads = [threading.Thread(target=bs.release) |
| 623 | for _ in range(limit)] |
| 624 | for t in threads: |
| 625 | t.start() |
| 626 | for t in threads: |
| 627 | t.join() |
| 628 | self.assertRaises(ValueError, bs.release) |
Tim Peters | 7634e1c | 2013-10-08 20:55:51 -0500 | [diff] [blame] | 629 | |
Serhiy Storchaka | f28ba36 | 2014-02-07 10:10:55 +0200 | [diff] [blame] | 630 | @cpython_only |
Victor Stinner | fdeb6ec | 2013-12-13 02:01:38 +0100 | [diff] [blame] | 631 | def test_frame_tstate_tracing(self): |
| 632 | # Issue #14432: Crash when a generator is created in a C thread that is |
| 633 | # destroyed while the generator is still used. The issue was that a |
| 634 | # generator contains a frame, and the frame kept a reference to the |
| 635 | # Python state of the destroyed C thread. The crash occurs when a trace |
| 636 | # function is setup. |
| 637 | |
| 638 | def noop_trace(frame, event, arg): |
| 639 | # no operation |
| 640 | return noop_trace |
| 641 | |
| 642 | def generator(): |
| 643 | while 1: |
Berker Peksag | 4882cac | 2015-04-14 09:30:01 +0300 | [diff] [blame] | 644 | yield "generator" |
Victor Stinner | fdeb6ec | 2013-12-13 02:01:38 +0100 | [diff] [blame] | 645 | |
| 646 | def callback(): |
| 647 | if callback.gen is None: |
| 648 | callback.gen = generator() |
| 649 | return next(callback.gen) |
| 650 | callback.gen = None |
| 651 | |
| 652 | old_trace = sys.gettrace() |
| 653 | sys.settrace(noop_trace) |
| 654 | try: |
| 655 | # Install a trace function |
| 656 | threading.settrace(noop_trace) |
| 657 | |
| 658 | # Create a generator in a C thread which exits after the call |
Serhiy Storchaka | f28ba36 | 2014-02-07 10:10:55 +0200 | [diff] [blame] | 659 | import _testcapi |
Victor Stinner | fdeb6ec | 2013-12-13 02:01:38 +0100 | [diff] [blame] | 660 | _testcapi.call_in_temporary_c_thread(callback) |
| 661 | |
| 662 | # Call the generator in a different Python thread, check that the |
| 663 | # generator didn't keep a reference to the destroyed thread state |
| 664 | for test in range(3): |
| 665 | # The trace function is still called here |
| 666 | callback() |
| 667 | finally: |
| 668 | sys.settrace(old_trace) |
| 669 | |
Victor Stinner | 45956b9 | 2013-11-12 16:37:55 +0100 | [diff] [blame] | 670 | |
Antoine Pitrou | b0e9bd4 | 2009-10-27 20:05:26 +0000 | [diff] [blame] | 671 | class ThreadJoinOnShutdown(BaseTestCase): |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 672 | |
| 673 | def _run_and_join(self, script): |
| 674 | script = """if 1: |
| 675 | import sys, os, time, threading |
| 676 | |
| 677 | # a thread, which waits for the main program to terminate |
| 678 | def joiningfunc(mainthread): |
| 679 | mainthread.join() |
| 680 | print('end of thread') |
Antoine Pitrou | 5fe291f | 2008-09-06 23:00:03 +0000 | [diff] [blame] | 681 | # stdout is fully buffered because not a tty, we have to flush |
| 682 | # before exit. |
| 683 | sys.stdout.flush() |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 684 | \n""" + script |
| 685 | |
Antoine Pitrou | c4d7864 | 2011-05-05 20:17:32 +0200 | [diff] [blame] | 686 | rc, out, err = assert_python_ok("-c", script) |
| 687 | data = out.decode().replace('\r', '') |
Benjamin Peterson | ad703dc | 2008-07-17 17:02:57 +0000 | [diff] [blame] | 688 | self.assertEqual(data, "end of main\nend of thread\n") |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 689 | |
| 690 | def test_1_join_on_shutdown(self): |
| 691 | # The usual case: on exit, wait for a non-daemon thread |
| 692 | script = """if 1: |
| 693 | import os |
| 694 | t = threading.Thread(target=joiningfunc, |
| 695 | args=(threading.current_thread(),)) |
| 696 | t.start() |
| 697 | time.sleep(0.1) |
| 698 | print('end of main') |
| 699 | """ |
| 700 | self._run_and_join(script) |
| 701 | |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 702 | @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()") |
Victor Stinner | 26d3186 | 2011-07-01 14:26:24 +0200 | [diff] [blame] | 703 | @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug") |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 704 | def test_2_join_in_forked_process(self): |
| 705 | # Like the test above, but from a forked interpreter |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 706 | script = """if 1: |
| 707 | childpid = os.fork() |
| 708 | if childpid != 0: |
| 709 | os.waitpid(childpid, 0) |
| 710 | sys.exit(0) |
| 711 | |
| 712 | t = threading.Thread(target=joiningfunc, |
| 713 | args=(threading.current_thread(),)) |
| 714 | t.start() |
| 715 | print('end of main') |
| 716 | """ |
| 717 | self._run_and_join(script) |
| 718 | |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 719 | @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()") |
Victor Stinner | 26d3186 | 2011-07-01 14:26:24 +0200 | [diff] [blame] | 720 | @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug") |
Antoine Pitrou | 5fe291f | 2008-09-06 23:00:03 +0000 | [diff] [blame] | 721 | def test_3_join_in_forked_from_thread(self): |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 722 | # Like the test above, but fork() was called from a worker thread |
| 723 | # In the forked process, the main Thread object must be marked as stopped. |
Alexandre Vassalotti | 93f2cd2 | 2009-07-22 04:54:52 +0000 | [diff] [blame] | 724 | |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 725 | script = """if 1: |
| 726 | main_thread = threading.current_thread() |
| 727 | def worker(): |
| 728 | childpid = os.fork() |
| 729 | if childpid != 0: |
| 730 | os.waitpid(childpid, 0) |
| 731 | sys.exit(0) |
| 732 | |
| 733 | t = threading.Thread(target=joiningfunc, |
| 734 | args=(main_thread,)) |
| 735 | print('end of main') |
| 736 | t.start() |
| 737 | t.join() # Should not block: main_thread is already stopped |
| 738 | |
| 739 | w = threading.Thread(target=worker) |
| 740 | w.start() |
| 741 | """ |
| 742 | self._run_and_join(script) |
| 743 | |
Victor Stinner | 26d3186 | 2011-07-01 14:26:24 +0200 | [diff] [blame] | 744 | @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug") |
Tim Peters | c363a23 | 2013-09-08 18:44:40 -0500 | [diff] [blame] | 745 | def test_4_daemon_threads(self): |
Antoine Pitrou | 0d5e52d | 2011-05-04 20:02:30 +0200 | [diff] [blame] | 746 | # Check that a daemon thread cannot crash the interpreter on shutdown |
| 747 | # by manipulating internal structures that are being disposed of in |
| 748 | # the main thread. |
| 749 | script = """if True: |
| 750 | import os |
| 751 | import random |
| 752 | import sys |
| 753 | import time |
| 754 | import threading |
| 755 | |
| 756 | thread_has_run = set() |
| 757 | |
| 758 | def random_io(): |
| 759 | '''Loop for a while sleeping random tiny amounts and doing some I/O.''' |
Antoine Pitrou | 0d5e52d | 2011-05-04 20:02:30 +0200 | [diff] [blame] | 760 | while True: |
Victor Stinner | a6d2c76 | 2011-06-30 18:20:11 +0200 | [diff] [blame] | 761 | in_f = open(os.__file__, 'rb') |
Antoine Pitrou | 0d5e52d | 2011-05-04 20:02:30 +0200 | [diff] [blame] | 762 | stuff = in_f.read(200) |
Victor Stinner | a6d2c76 | 2011-06-30 18:20:11 +0200 | [diff] [blame] | 763 | null_f = open(os.devnull, 'wb') |
Antoine Pitrou | 0d5e52d | 2011-05-04 20:02:30 +0200 | [diff] [blame] | 764 | null_f.write(stuff) |
| 765 | time.sleep(random.random() / 1995) |
| 766 | null_f.close() |
| 767 | in_f.close() |
| 768 | thread_has_run.add(threading.current_thread()) |
| 769 | |
| 770 | def main(): |
| 771 | count = 0 |
| 772 | for _ in range(40): |
| 773 | new_thread = threading.Thread(target=random_io) |
| 774 | new_thread.daemon = True |
| 775 | new_thread.start() |
| 776 | count += 1 |
| 777 | while len(thread_has_run) < count: |
| 778 | time.sleep(0.001) |
| 779 | # Trigger process shutdown |
| 780 | sys.exit(0) |
| 781 | |
| 782 | main() |
| 783 | """ |
| 784 | rc, out, err = assert_python_ok('-c', script) |
| 785 | self.assertFalse(err) |
| 786 | |
Charles-François Natali | 6d0d24e | 2012-02-02 20:31:42 +0100 | [diff] [blame] | 787 | @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()") |
Charles-François Natali | b2c9e9a | 2012-02-08 21:29:11 +0100 | [diff] [blame] | 788 | @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug") |
Charles-François Natali | 6d0d24e | 2012-02-02 20:31:42 +0100 | [diff] [blame] | 789 | def test_reinit_tls_after_fork(self): |
| 790 | # Issue #13817: fork() would deadlock in a multithreaded program with |
| 791 | # the ad-hoc TLS implementation. |
| 792 | |
| 793 | def do_fork_and_wait(): |
| 794 | # just fork a child process and wait it |
| 795 | pid = os.fork() |
| 796 | if pid > 0: |
| 797 | os.waitpid(pid, 0) |
| 798 | else: |
| 799 | os._exit(0) |
| 800 | |
| 801 | # start a bunch of threads that will fork() child processes |
| 802 | threads = [] |
| 803 | for i in range(16): |
| 804 | t = threading.Thread(target=do_fork_and_wait) |
| 805 | threads.append(t) |
| 806 | t.start() |
| 807 | |
| 808 | for t in threads: |
| 809 | t.join() |
| 810 | |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 811 | @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()") |
| 812 | def test_clear_threads_states_after_fork(self): |
| 813 | # Issue #17094: check that threads states are cleared after fork() |
| 814 | |
| 815 | # start a bunch of threads |
| 816 | threads = [] |
| 817 | for i in range(16): |
| 818 | t = threading.Thread(target=lambda : time.sleep(0.3)) |
| 819 | threads.append(t) |
| 820 | t.start() |
| 821 | |
| 822 | pid = os.fork() |
| 823 | if pid == 0: |
| 824 | # check that threads states have been cleared |
| 825 | if len(sys._current_frames()) == 1: |
| 826 | os._exit(0) |
| 827 | else: |
| 828 | os._exit(1) |
| 829 | else: |
| 830 | _, status = os.waitpid(pid, 0) |
| 831 | self.assertEqual(0, status) |
| 832 | |
| 833 | for t in threads: |
| 834 | t.join() |
| 835 | |
Jesse Noller | a851397 | 2008-07-17 16:49:17 +0000 | [diff] [blame] | 836 | |
Antoine Pitrou | 7eaf3f7 | 2013-08-25 19:48:18 +0200 | [diff] [blame] | 837 | class SubinterpThreadingTests(BaseTestCase): |
| 838 | |
| 839 | def test_threads_join(self): |
| 840 | # Non-daemon threads should be joined at subinterpreter shutdown |
| 841 | # (issue #18808) |
| 842 | r, w = os.pipe() |
| 843 | self.addCleanup(os.close, r) |
| 844 | self.addCleanup(os.close, w) |
| 845 | code = r"""if 1: |
| 846 | import os |
| 847 | import threading |
| 848 | import time |
| 849 | |
| 850 | def f(): |
| 851 | # Sleep a bit so that the thread is still running when |
| 852 | # Py_EndInterpreter is called. |
| 853 | time.sleep(0.05) |
| 854 | os.write(%d, b"x") |
| 855 | threading.Thread(target=f).start() |
| 856 | """ % (w,) |
Victor Stinner | ed3b0bc | 2013-11-23 12:27:24 +0100 | [diff] [blame] | 857 | ret = test.support.run_in_subinterp(code) |
Antoine Pitrou | 7eaf3f7 | 2013-08-25 19:48:18 +0200 | [diff] [blame] | 858 | self.assertEqual(ret, 0) |
| 859 | # The thread was joined properly. |
| 860 | self.assertEqual(os.read(r, 1), b"x") |
| 861 | |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 862 | def test_threads_join_2(self): |
| 863 | # Same as above, but a delay gets introduced after the thread's |
| 864 | # Python code returned but before the thread state is deleted. |
| 865 | # To achieve this, we register a thread-local object which sleeps |
| 866 | # a bit when deallocated. |
| 867 | r, w = os.pipe() |
| 868 | self.addCleanup(os.close, r) |
| 869 | self.addCleanup(os.close, w) |
| 870 | code = r"""if 1: |
| 871 | import os |
| 872 | import threading |
| 873 | import time |
| 874 | |
| 875 | class Sleeper: |
| 876 | def __del__(self): |
| 877 | time.sleep(0.05) |
| 878 | |
| 879 | tls = threading.local() |
| 880 | |
| 881 | def f(): |
| 882 | # Sleep a bit so that the thread is still running when |
| 883 | # Py_EndInterpreter is called. |
| 884 | time.sleep(0.05) |
| 885 | tls.x = Sleeper() |
| 886 | os.write(%d, b"x") |
| 887 | threading.Thread(target=f).start() |
| 888 | """ % (w,) |
Victor Stinner | ed3b0bc | 2013-11-23 12:27:24 +0100 | [diff] [blame] | 889 | ret = test.support.run_in_subinterp(code) |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 890 | self.assertEqual(ret, 0) |
| 891 | # The thread was joined properly. |
| 892 | self.assertEqual(os.read(r, 1), b"x") |
| 893 | |
Serhiy Storchaka | 5cfc79d | 2014-02-07 10:06:39 +0200 | [diff] [blame] | 894 | @cpython_only |
Antoine Pitrou | 7eaf3f7 | 2013-08-25 19:48:18 +0200 | [diff] [blame] | 895 | def test_daemon_threads_fatal_error(self): |
| 896 | subinterp_code = r"""if 1: |
| 897 | import os |
| 898 | import threading |
| 899 | import time |
| 900 | |
| 901 | def f(): |
| 902 | # Make sure the daemon thread is still running when |
| 903 | # Py_EndInterpreter is called. |
| 904 | time.sleep(10) |
| 905 | threading.Thread(target=f, daemon=True).start() |
| 906 | """ |
| 907 | script = r"""if 1: |
| 908 | import _testcapi |
| 909 | |
| 910 | _testcapi.run_in_subinterp(%r) |
| 911 | """ % (subinterp_code,) |
Antoine Pitrou | 77e904e | 2013-10-08 23:04:32 +0200 | [diff] [blame] | 912 | with test.support.SuppressCrashReport(): |
| 913 | rc, out, err = assert_python_failure("-c", script) |
Antoine Pitrou | 7eaf3f7 | 2013-08-25 19:48:18 +0200 | [diff] [blame] | 914 | self.assertIn("Fatal Python error: Py_EndInterpreter: " |
| 915 | "not the last thread", err.decode()) |
| 916 | |
| 917 | |
Antoine Pitrou | b0e9bd4 | 2009-10-27 20:05:26 +0000 | [diff] [blame] | 918 | class ThreadingExceptionTests(BaseTestCase): |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 919 | # A RuntimeError should be raised if Thread.start() is called |
| 920 | # multiple times. |
| 921 | def test_start_thread_again(self): |
| 922 | thread = threading.Thread() |
| 923 | thread.start() |
| 924 | self.assertRaises(RuntimeError, thread.start) |
Victor Stinner | b8c7be2 | 2017-09-14 13:05:21 -0700 | [diff] [blame] | 925 | thread.join() |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 926 | |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 927 | def test_joining_current_thread(self): |
Benjamin Peterson | 672b803 | 2008-06-11 19:14:14 +0000 | [diff] [blame] | 928 | current_thread = threading.current_thread() |
| 929 | self.assertRaises(RuntimeError, current_thread.join); |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 930 | |
| 931 | def test_joining_inactive_thread(self): |
| 932 | thread = threading.Thread() |
| 933 | self.assertRaises(RuntimeError, thread.join) |
| 934 | |
| 935 | def test_daemonize_active_thread(self): |
| 936 | thread = threading.Thread() |
| 937 | thread.start() |
Benjamin Peterson | fdbea96 | 2008-08-18 17:33:47 +0000 | [diff] [blame] | 938 | self.assertRaises(RuntimeError, setattr, thread, "daemon", True) |
Victor Stinner | b8c7be2 | 2017-09-14 13:05:21 -0700 | [diff] [blame] | 939 | thread.join() |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 940 | |
Antoine Pitrou | fcf81fd | 2011-02-28 22:03:34 +0000 | [diff] [blame] | 941 | def test_releasing_unacquired_lock(self): |
| 942 | lock = threading.Lock() |
| 943 | self.assertRaises(RuntimeError, lock.release) |
| 944 | |
Benjamin Peterson | d541d3f | 2012-10-13 11:46:44 -0400 | [diff] [blame] | 945 | @unittest.skipUnless(sys.platform == 'darwin' and test.support.python_is_optimized(), |
| 946 | 'test macosx problem') |
Ned Deily | 9a7c524 | 2011-05-28 00:19:56 -0700 | [diff] [blame] | 947 | def test_recursion_limit(self): |
| 948 | # Issue 9670 |
| 949 | # test that excessive recursion within a non-main thread causes |
| 950 | # an exception rather than crashing the interpreter on platforms |
| 951 | # like Mac OS X or FreeBSD which have small default stack sizes |
| 952 | # for threads |
| 953 | script = """if True: |
| 954 | import threading |
| 955 | |
| 956 | def recurse(): |
| 957 | return recurse() |
| 958 | |
| 959 | def outer(): |
| 960 | try: |
| 961 | recurse() |
Yury Selivanov | f488fb4 | 2015-07-03 01:04:23 -0400 | [diff] [blame] | 962 | except RecursionError: |
Ned Deily | 9a7c524 | 2011-05-28 00:19:56 -0700 | [diff] [blame] | 963 | pass |
| 964 | |
| 965 | w = threading.Thread(target=outer) |
| 966 | w.start() |
| 967 | w.join() |
| 968 | print('end of main thread') |
| 969 | """ |
| 970 | expected_output = "end of main thread\n" |
| 971 | p = subprocess.Popen([sys.executable, "-c", script], |
Antoine Pitrou | b8b6a68 | 2012-06-29 19:40:35 +0200 | [diff] [blame] | 972 | stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
Ned Deily | 9a7c524 | 2011-05-28 00:19:56 -0700 | [diff] [blame] | 973 | stdout, stderr = p.communicate() |
| 974 | data = stdout.decode().replace('\r', '') |
Antoine Pitrou | b8b6a68 | 2012-06-29 19:40:35 +0200 | [diff] [blame] | 975 | self.assertEqual(p.returncode, 0, "Unexpected error: " + stderr.decode()) |
Ned Deily | 9a7c524 | 2011-05-28 00:19:56 -0700 | [diff] [blame] | 976 | self.assertEqual(data, expected_output) |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 977 | |
Serhiy Storchaka | 52005c2 | 2014-09-21 22:08:13 +0300 | [diff] [blame] | 978 | def test_print_exception(self): |
| 979 | script = r"""if True: |
| 980 | import threading |
| 981 | import time |
| 982 | |
| 983 | running = False |
| 984 | def run(): |
| 985 | global running |
| 986 | running = True |
| 987 | while running: |
| 988 | time.sleep(0.01) |
| 989 | 1/0 |
| 990 | t = threading.Thread(target=run) |
| 991 | t.start() |
| 992 | while not running: |
| 993 | time.sleep(0.01) |
| 994 | running = False |
| 995 | t.join() |
| 996 | """ |
| 997 | rc, out, err = assert_python_ok("-c", script) |
| 998 | self.assertEqual(out, b'') |
| 999 | err = err.decode() |
| 1000 | self.assertIn("Exception in thread", err) |
| 1001 | self.assertIn("Traceback (most recent call last):", err) |
| 1002 | self.assertIn("ZeroDivisionError", err) |
| 1003 | self.assertNotIn("Unhandled exception", err) |
| 1004 | |
Serhiy Storchaka | a793037 | 2016-07-03 22:27:26 +0300 | [diff] [blame] | 1005 | @requires_type_collecting |
Serhiy Storchaka | 52005c2 | 2014-09-21 22:08:13 +0300 | [diff] [blame] | 1006 | def test_print_exception_stderr_is_none_1(self): |
| 1007 | script = r"""if True: |
| 1008 | import sys |
| 1009 | import threading |
| 1010 | import time |
| 1011 | |
| 1012 | running = False |
| 1013 | def run(): |
| 1014 | global running |
| 1015 | running = True |
| 1016 | while running: |
| 1017 | time.sleep(0.01) |
| 1018 | 1/0 |
| 1019 | t = threading.Thread(target=run) |
| 1020 | t.start() |
| 1021 | while not running: |
| 1022 | time.sleep(0.01) |
| 1023 | sys.stderr = None |
| 1024 | running = False |
| 1025 | t.join() |
| 1026 | """ |
| 1027 | rc, out, err = assert_python_ok("-c", script) |
| 1028 | self.assertEqual(out, b'') |
| 1029 | err = err.decode() |
| 1030 | self.assertIn("Exception in thread", err) |
| 1031 | self.assertIn("Traceback (most recent call last):", err) |
| 1032 | self.assertIn("ZeroDivisionError", err) |
| 1033 | self.assertNotIn("Unhandled exception", err) |
| 1034 | |
| 1035 | def test_print_exception_stderr_is_none_2(self): |
| 1036 | script = r"""if True: |
| 1037 | import sys |
| 1038 | import threading |
| 1039 | import time |
| 1040 | |
| 1041 | running = False |
| 1042 | def run(): |
| 1043 | global running |
| 1044 | running = True |
| 1045 | while running: |
| 1046 | time.sleep(0.01) |
| 1047 | 1/0 |
| 1048 | sys.stderr = None |
| 1049 | t = threading.Thread(target=run) |
| 1050 | t.start() |
| 1051 | while not running: |
| 1052 | time.sleep(0.01) |
| 1053 | running = False |
| 1054 | t.join() |
| 1055 | """ |
| 1056 | rc, out, err = assert_python_ok("-c", script) |
| 1057 | self.assertEqual(out, b'') |
| 1058 | self.assertNotIn("Unhandled exception", err.decode()) |
| 1059 | |
Victor Stinner | eec9331 | 2016-08-18 18:13:10 +0200 | [diff] [blame] | 1060 | def test_bare_raise_in_brand_new_thread(self): |
| 1061 | def bare_raise(): |
| 1062 | raise |
| 1063 | |
| 1064 | class Issue27558(threading.Thread): |
| 1065 | exc = None |
| 1066 | |
| 1067 | def run(self): |
| 1068 | try: |
| 1069 | bare_raise() |
| 1070 | except Exception as exc: |
| 1071 | self.exc = exc |
| 1072 | |
| 1073 | thread = Issue27558() |
| 1074 | thread.start() |
| 1075 | thread.join() |
| 1076 | self.assertIsNotNone(thread.exc) |
| 1077 | self.assertIsInstance(thread.exc, RuntimeError) |
Victor Stinner | 3d284c0 | 2017-08-19 01:54:42 +0200 | [diff] [blame] | 1078 | # explicitly break the reference cycle to not leak a dangling thread |
| 1079 | thread.exc = None |
Serhiy Storchaka | 52005c2 | 2014-09-21 22:08:13 +0300 | [diff] [blame] | 1080 | |
R David Murray | 19aeb43 | 2013-03-30 17:19:38 -0400 | [diff] [blame] | 1081 | class TimerTests(BaseTestCase): |
| 1082 | |
| 1083 | def setUp(self): |
| 1084 | BaseTestCase.setUp(self) |
| 1085 | self.callback_args = [] |
| 1086 | self.callback_event = threading.Event() |
| 1087 | |
| 1088 | def test_init_immutable_default_args(self): |
| 1089 | # Issue 17435: constructor defaults were mutable objects, they could be |
| 1090 | # mutated via the object attributes and affect other Timer objects. |
| 1091 | timer1 = threading.Timer(0.01, self._callback_spy) |
| 1092 | timer1.start() |
| 1093 | self.callback_event.wait() |
| 1094 | timer1.args.append("blah") |
| 1095 | timer1.kwargs["foo"] = "bar" |
| 1096 | self.callback_event.clear() |
| 1097 | timer2 = threading.Timer(0.01, self._callback_spy) |
| 1098 | timer2.start() |
| 1099 | self.callback_event.wait() |
| 1100 | self.assertEqual(len(self.callback_args), 2) |
| 1101 | self.assertEqual(self.callback_args, [((), {}), ((), {})]) |
Victor Stinner | da3e5cf | 2017-09-15 05:37:42 -0700 | [diff] [blame^] | 1102 | timer1.join() |
| 1103 | timer2.join() |
R David Murray | 19aeb43 | 2013-03-30 17:19:38 -0400 | [diff] [blame] | 1104 | |
| 1105 | def _callback_spy(self, *args, **kwargs): |
| 1106 | self.callback_args.append((args[:], kwargs.copy())) |
| 1107 | self.callback_event.set() |
| 1108 | |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 1109 | class LockTests(lock_tests.LockTests): |
| 1110 | locktype = staticmethod(threading.Lock) |
| 1111 | |
Antoine Pitrou | 434736a | 2009-11-10 18:46:01 +0000 | [diff] [blame] | 1112 | class PyRLockTests(lock_tests.RLockTests): |
| 1113 | locktype = staticmethod(threading._PyRLock) |
| 1114 | |
Charles-François Natali | 6b671b2 | 2012-01-28 11:36:04 +0100 | [diff] [blame] | 1115 | @unittest.skipIf(threading._CRLock is None, 'RLock not implemented in C') |
Antoine Pitrou | 434736a | 2009-11-10 18:46:01 +0000 | [diff] [blame] | 1116 | class CRLockTests(lock_tests.RLockTests): |
| 1117 | locktype = staticmethod(threading._CRLock) |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 1118 | |
| 1119 | class EventTests(lock_tests.EventTests): |
| 1120 | eventtype = staticmethod(threading.Event) |
| 1121 | |
| 1122 | class ConditionAsRLockTests(lock_tests.RLockTests): |
Serhiy Storchaka | 6a7b3a7 | 2016-04-17 08:32:47 +0300 | [diff] [blame] | 1123 | # Condition uses an RLock by default and exports its API. |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 1124 | locktype = staticmethod(threading.Condition) |
| 1125 | |
| 1126 | class ConditionTests(lock_tests.ConditionTests): |
| 1127 | condtype = staticmethod(threading.Condition) |
| 1128 | |
| 1129 | class SemaphoreTests(lock_tests.SemaphoreTests): |
| 1130 | semtype = staticmethod(threading.Semaphore) |
| 1131 | |
| 1132 | class BoundedSemaphoreTests(lock_tests.BoundedSemaphoreTests): |
| 1133 | semtype = staticmethod(threading.BoundedSemaphore) |
| 1134 | |
Kristján Valur Jónsson | 3be0003 | 2010-10-28 09:43:10 +0000 | [diff] [blame] | 1135 | class BarrierTests(lock_tests.BarrierTests): |
| 1136 | barriertype = staticmethod(threading.Barrier) |
Antoine Pitrou | 557934f | 2009-11-06 22:41:14 +0000 | [diff] [blame] | 1137 | |
Martin Panter | 19e69c5 | 2015-11-14 12:46:42 +0000 | [diff] [blame] | 1138 | class MiscTestCase(unittest.TestCase): |
| 1139 | def test__all__(self): |
| 1140 | extra = {"ThreadError"} |
| 1141 | blacklist = {'currentThread', 'activeCount'} |
| 1142 | support.check__all__(self, threading, ('threading', '_thread'), |
| 1143 | extra=extra, blacklist=blacklist) |
| 1144 | |
Tim Peters | 84d5489 | 2005-01-08 06:03:17 +0000 | [diff] [blame] | 1145 | if __name__ == "__main__": |
R David Murray | 19aeb43 | 2013-03-30 17:19:38 -0400 | [diff] [blame] | 1146 | unittest.main() |