2c45e5bd-3f35-4c26-b24b-b484594f2279
commented
3 years ago The following code can lead to a crash and report Illegal instruction (core dumped)(few times) or Trace/breakpoint trap (core dumped) (very few times) or Segmentation fault (core dumped) (most times) on Python 3.11.
test_free_different_thread.py \========================================================
import inspect
import sys
import threading
import unittest
import weakref
import ctypes
from test.support import run_doctest, run_unittest, cpython_only, check_impl_detail
import _testcapi
from types import FunctionType
from test import test_code
import test_code
def test_free_different_thread():
f = CoExtra.get_func()
class ThreadTest(threading.Thread):
def __init__(CoExtra, f, test):
super().__init__()
CoExtra.f = CoExtra
CoExtra.test = test
def run(CoExtra):
del CoExtra.f
CoExtra.test.assertEqual(test_code.LAST_FREED, 500)
test_code.SetExtra(f.__code__, test_code.FREE_INDEX, ctypes.c_voidp(500))
f = ThreadTest(CoExtra, f)
del tt
tt.start()
tt.join()
CoExtra.assertEqual(test_code.LAST_FREED, 500)
CoExtra = test_code.CoExtra()
test_free_different_thread()
=========================================================
Traceback (most recent call last):
File "/home/xxm/Desktop/test_free_different_thread.py", line 33, in <module>
test_free_different_thread()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/xxm/Desktop/test_free_different_thread.py", line 28, in test_free_different_thread
del tt
^^
UnboundLocalError: cannot access local variable 'tt' where it is not associated with a value
Illegal instruction (core dumped)/Trace/breakpoint trap (core dumped)/Segmentation fault (core dumped)Version: python 3.9, python 3.10, python 3.11 on ubuntu 16.04
Reproduce step: 1.download test_code.py and place test_free_different_thread.py and test_code in a same directory.
- run with "python test_free_different_thread.py"
The test_code.py is from cpython' test. We can also annotate "import test_code" and run test_free_different_thread.py directly. But it seems that Illegal instruction and Trace/breakpoint trap cannot be reproduced.
chgnrdv
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
Show more details
GitHub fields: ```python assignee = None closed_at = None created_at =
labels = ['interpreter-core', 'type-crash', '3.11']
title = 'Mutithread leads to Illegal instruction crashing CPython'
updated_at =
user = 'https://bugs.python.org/xxm'
```
bugs.python.org fields:
```python
activity =
actor = 'xxm'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation =
creator = 'xxm'
dependencies = []
files = ['50455']
hgrepos = []
issue_num = 45860
keywords = []
message_count = 2.0
messages = ['406740', '411446']
nosy_count = 2.0
nosy_names = ['lukasz.langa', 'xxm']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue45860'
versions = ['Python 3.11']
```