mirror of
https://github.com/python/cpython.git
synced 2024-11-21 21:09:37 +01:00
902 lines
30 KiB
Python
902 lines
30 KiB
Python
from contextlib import contextmanager
|
|
import datetime
|
|
import faulthandler
|
|
import os
|
|
import re
|
|
import signal
|
|
import subprocess
|
|
import sys
|
|
from test import support
|
|
from test.support import os_helper, script_helper, is_android, MS_WINDOWS
|
|
import tempfile
|
|
import unittest
|
|
from textwrap import dedent
|
|
|
|
try:
|
|
import _testcapi
|
|
except ImportError:
|
|
_testcapi = None
|
|
|
|
if not support.has_subprocess_support:
|
|
raise unittest.SkipTest("test module requires subprocess")
|
|
|
|
TIMEOUT = 0.5
|
|
|
|
|
|
def expected_traceback(lineno1, lineno2, header, min_count=1):
|
|
regex = header
|
|
regex += ' File "<string>", line %s in func\n' % lineno1
|
|
regex += ' File "<string>", line %s in <module>' % lineno2
|
|
if 1 < min_count:
|
|
return '^' + (regex + '\n') * (min_count - 1) + regex
|
|
else:
|
|
return '^' + regex + '$'
|
|
|
|
def skip_segfault_on_android(test):
|
|
# gh-76319: Raising SIGSEGV on Android may not cause a crash.
|
|
return unittest.skipIf(is_android,
|
|
'raising SIGSEGV on Android is unreliable')(test)
|
|
|
|
@contextmanager
|
|
def temporary_filename():
|
|
filename = tempfile.mktemp()
|
|
try:
|
|
yield filename
|
|
finally:
|
|
os_helper.unlink(filename)
|
|
|
|
class FaultHandlerTests(unittest.TestCase):
|
|
|
|
def get_output(self, code, filename=None, fd=None):
|
|
"""
|
|
Run the specified code in Python (in a new child process) and read the
|
|
output from the standard error or from a file (if filename is set).
|
|
Return the output lines as a list.
|
|
|
|
Strip the reference count from the standard error for Python debug
|
|
build, and replace "Current thread 0x00007f8d8fbd9700" by "Current
|
|
thread XXX".
|
|
"""
|
|
code = dedent(code).strip()
|
|
pass_fds = []
|
|
if fd is not None:
|
|
pass_fds.append(fd)
|
|
env = dict(os.environ)
|
|
|
|
# Sanitizers must not handle SIGSEGV (ex: for test_enable_fd())
|
|
option = 'handle_segv=0'
|
|
support.set_sanitizer_env_var(env, option)
|
|
|
|
with support.SuppressCrashReport():
|
|
process = script_helper.spawn_python('-c', code,
|
|
pass_fds=pass_fds,
|
|
env=env)
|
|
with process:
|
|
output, stderr = process.communicate()
|
|
exitcode = process.wait()
|
|
output = output.decode('ascii', 'backslashreplace')
|
|
if filename:
|
|
self.assertEqual(output, '')
|
|
with open(filename, "rb") as fp:
|
|
output = fp.read()
|
|
output = output.decode('ascii', 'backslashreplace')
|
|
elif fd is not None:
|
|
self.assertEqual(output, '')
|
|
os.lseek(fd, os.SEEK_SET, 0)
|
|
with open(fd, "rb", closefd=False) as fp:
|
|
output = fp.read()
|
|
output = output.decode('ascii', 'backslashreplace')
|
|
return output.splitlines(), exitcode
|
|
|
|
def check_error(self, code, lineno, fatal_error, *,
|
|
filename=None, all_threads=True, other_regex=None,
|
|
fd=None, know_current_thread=True,
|
|
py_fatal_error=False,
|
|
garbage_collecting=False,
|
|
function='<module>'):
|
|
"""
|
|
Check that the fault handler for fatal errors is enabled and check the
|
|
traceback from the child process output.
|
|
|
|
Raise an error if the output doesn't match the expected format.
|
|
"""
|
|
if all_threads:
|
|
if know_current_thread:
|
|
header = 'Current thread 0x[0-9a-f]+'
|
|
else:
|
|
header = 'Thread 0x[0-9a-f]+'
|
|
else:
|
|
header = 'Stack'
|
|
regex = [f'^{fatal_error}']
|
|
if py_fatal_error:
|
|
regex.append("Python runtime state: initialized")
|
|
regex.append('')
|
|
regex.append(fr'{header} \(most recent call first\):')
|
|
if garbage_collecting:
|
|
regex.append(' Garbage-collecting')
|
|
regex.append(fr' File "<string>", line {lineno} in {function}')
|
|
regex = '\n'.join(regex)
|
|
|
|
if other_regex:
|
|
regex = f'(?:{regex}|{other_regex})'
|
|
|
|
# Enable MULTILINE flag
|
|
regex = f'(?m){regex}'
|
|
output, exitcode = self.get_output(code, filename=filename, fd=fd)
|
|
output = '\n'.join(output)
|
|
self.assertRegex(output, regex)
|
|
self.assertNotEqual(exitcode, 0)
|
|
|
|
def check_fatal_error(self, code, line_number, name_regex, func=None, **kw):
|
|
if func:
|
|
name_regex = '%s: %s' % (func, name_regex)
|
|
fatal_error = 'Fatal Python error: %s' % name_regex
|
|
self.check_error(code, line_number, fatal_error, **kw)
|
|
|
|
def check_windows_exception(self, code, line_number, name_regex, **kw):
|
|
fatal_error = 'Windows fatal exception: %s' % name_regex
|
|
self.check_error(code, line_number, fatal_error, **kw)
|
|
|
|
@unittest.skipIf(sys.platform.startswith('aix'),
|
|
"the first page of memory is a mapped read-only on AIX")
|
|
def test_read_null(self):
|
|
if not MS_WINDOWS:
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._read_null()
|
|
""",
|
|
3,
|
|
# Issue #12700: Read NULL raises SIGILL on Mac OS X Lion
|
|
'(?:Segmentation fault'
|
|
'|Bus error'
|
|
'|Illegal instruction)')
|
|
else:
|
|
self.check_windows_exception("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._read_null()
|
|
""",
|
|
3,
|
|
'access violation')
|
|
|
|
@skip_segfault_on_android
|
|
def test_sigsegv(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._sigsegv()
|
|
""",
|
|
3,
|
|
'Segmentation fault')
|
|
|
|
@skip_segfault_on_android
|
|
def test_gc(self):
|
|
# bpo-44466: Detect if the GC is running
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
import gc
|
|
import sys
|
|
|
|
faulthandler.enable()
|
|
|
|
class RefCycle:
|
|
def __del__(self):
|
|
faulthandler._sigsegv()
|
|
|
|
# create a reference cycle which triggers a fatal
|
|
# error in a destructor
|
|
a = RefCycle()
|
|
b = RefCycle()
|
|
a.b = b
|
|
b.a = a
|
|
|
|
# Delete the objects, not the cycle
|
|
a = None
|
|
b = None
|
|
|
|
# Break the reference cycle: call __del__()
|
|
gc.collect()
|
|
|
|
# Should not reach this line
|
|
print("exit", file=sys.stderr)
|
|
""",
|
|
9,
|
|
'Segmentation fault',
|
|
function='__del__',
|
|
garbage_collecting=True)
|
|
|
|
def test_fatal_error_c_thread(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._fatal_error_c_thread()
|
|
""",
|
|
3,
|
|
'in new thread',
|
|
know_current_thread=False,
|
|
func='faulthandler_fatal_error_thread',
|
|
py_fatal_error=True)
|
|
|
|
def test_sigabrt(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._sigabrt()
|
|
""",
|
|
3,
|
|
'Aborted')
|
|
|
|
@unittest.skipIf(sys.platform == 'win32',
|
|
"SIGFPE cannot be caught on Windows")
|
|
def test_sigfpe(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._sigfpe()
|
|
""",
|
|
3,
|
|
'Floating-point exception')
|
|
|
|
@unittest.skipIf(_testcapi is None, 'need _testcapi')
|
|
@unittest.skipUnless(hasattr(signal, 'SIGBUS'), 'need signal.SIGBUS')
|
|
@skip_segfault_on_android
|
|
def test_sigbus(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
import signal
|
|
|
|
faulthandler.enable()
|
|
signal.raise_signal(signal.SIGBUS)
|
|
""",
|
|
5,
|
|
'Bus error')
|
|
|
|
@unittest.skipIf(_testcapi is None, 'need _testcapi')
|
|
@unittest.skipUnless(hasattr(signal, 'SIGILL'), 'need signal.SIGILL')
|
|
@skip_segfault_on_android
|
|
def test_sigill(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
import signal
|
|
|
|
faulthandler.enable()
|
|
signal.raise_signal(signal.SIGILL)
|
|
""",
|
|
5,
|
|
'Illegal instruction')
|
|
|
|
@unittest.skipIf(_testcapi is None, 'need _testcapi')
|
|
def check_fatal_error_func(self, release_gil):
|
|
# Test that Py_FatalError() dumps a traceback
|
|
with support.SuppressCrashReport():
|
|
self.check_fatal_error(f"""
|
|
import _testcapi
|
|
_testcapi.fatal_error(b'xyz', {release_gil})
|
|
""",
|
|
2,
|
|
'xyz',
|
|
func='_testcapi_fatal_error_impl',
|
|
py_fatal_error=True)
|
|
|
|
def test_fatal_error(self):
|
|
self.check_fatal_error_func(False)
|
|
|
|
def test_fatal_error_without_gil(self):
|
|
self.check_fatal_error_func(True)
|
|
|
|
@unittest.skipIf(sys.platform.startswith('openbsd'),
|
|
"Issue #12868: sigaltstack() doesn't work on "
|
|
"OpenBSD if Python is compiled with pthread")
|
|
@unittest.skipIf(not hasattr(faulthandler, '_stack_overflow'),
|
|
'need faulthandler._stack_overflow()')
|
|
def test_stack_overflow(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._stack_overflow()
|
|
""",
|
|
3,
|
|
'(?:Segmentation fault|Bus error)',
|
|
other_regex='unable to raise a stack overflow')
|
|
|
|
@skip_segfault_on_android
|
|
def test_gil_released(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._sigsegv(True)
|
|
""",
|
|
3,
|
|
'Segmentation fault')
|
|
|
|
@skip_segfault_on_android
|
|
def test_enable_file(self):
|
|
with temporary_filename() as filename:
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
output = open({filename}, 'wb')
|
|
faulthandler.enable(output)
|
|
faulthandler._sigsegv()
|
|
""".format(filename=repr(filename)),
|
|
4,
|
|
'Segmentation fault',
|
|
filename=filename)
|
|
|
|
@unittest.skipIf(sys.platform == "win32",
|
|
"subprocess doesn't support pass_fds on Windows")
|
|
@skip_segfault_on_android
|
|
def test_enable_fd(self):
|
|
with tempfile.TemporaryFile('wb+') as fp:
|
|
fd = fp.fileno()
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
import sys
|
|
faulthandler.enable(%s)
|
|
faulthandler._sigsegv()
|
|
""" % fd,
|
|
4,
|
|
'Segmentation fault',
|
|
fd=fd)
|
|
|
|
@skip_segfault_on_android
|
|
def test_enable_single_thread(self):
|
|
self.check_fatal_error("""
|
|
import faulthandler
|
|
faulthandler.enable(all_threads=False)
|
|
faulthandler._sigsegv()
|
|
""",
|
|
3,
|
|
'Segmentation fault',
|
|
all_threads=False)
|
|
|
|
@skip_segfault_on_android
|
|
def test_disable(self):
|
|
code = """
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler.disable()
|
|
faulthandler._sigsegv()
|
|
"""
|
|
not_expected = 'Fatal Python error'
|
|
stderr, exitcode = self.get_output(code)
|
|
stderr = '\n'.join(stderr)
|
|
self.assertTrue(not_expected not in stderr,
|
|
"%r is present in %r" % (not_expected, stderr))
|
|
self.assertNotEqual(exitcode, 0)
|
|
|
|
@skip_segfault_on_android
|
|
def test_dump_ext_modules(self):
|
|
code = """
|
|
import faulthandler
|
|
import sys
|
|
# Don't filter stdlib module names
|
|
sys.stdlib_module_names = frozenset()
|
|
faulthandler.enable()
|
|
faulthandler._sigsegv()
|
|
"""
|
|
stderr, exitcode = self.get_output(code)
|
|
stderr = '\n'.join(stderr)
|
|
match = re.search(r'^Extension modules:(.*) \(total: [0-9]+\)$',
|
|
stderr, re.MULTILINE)
|
|
if not match:
|
|
self.fail(f"Cannot find 'Extension modules:' in {stderr!r}")
|
|
modules = set(match.group(1).strip().split(', '))
|
|
for name in ('sys', 'faulthandler'):
|
|
self.assertIn(name, modules)
|
|
|
|
def test_is_enabled(self):
|
|
orig_stderr = sys.stderr
|
|
try:
|
|
# regrtest may replace sys.stderr by io.StringIO object, but
|
|
# faulthandler.enable() requires that sys.stderr has a fileno()
|
|
# method
|
|
sys.stderr = sys.__stderr__
|
|
|
|
was_enabled = faulthandler.is_enabled()
|
|
try:
|
|
faulthandler.enable()
|
|
self.assertTrue(faulthandler.is_enabled())
|
|
faulthandler.disable()
|
|
self.assertFalse(faulthandler.is_enabled())
|
|
finally:
|
|
if was_enabled:
|
|
faulthandler.enable()
|
|
else:
|
|
faulthandler.disable()
|
|
finally:
|
|
sys.stderr = orig_stderr
|
|
|
|
@support.requires_subprocess()
|
|
def test_disabled_by_default(self):
|
|
# By default, the module should be disabled
|
|
code = "import faulthandler; print(faulthandler.is_enabled())"
|
|
args = (sys.executable, "-E", "-c", code)
|
|
# don't use assert_python_ok() because it always enables faulthandler
|
|
output = subprocess.check_output(args)
|
|
self.assertEqual(output.rstrip(), b"False")
|
|
|
|
@support.requires_subprocess()
|
|
def test_sys_xoptions(self):
|
|
# Test python -X faulthandler
|
|
code = "import faulthandler; print(faulthandler.is_enabled())"
|
|
args = filter(None, (sys.executable,
|
|
"-E" if sys.flags.ignore_environment else "",
|
|
"-X", "faulthandler", "-c", code))
|
|
env = os.environ.copy()
|
|
env.pop("PYTHONFAULTHANDLER", None)
|
|
# don't use assert_python_ok() because it always enables faulthandler
|
|
output = subprocess.check_output(args, env=env)
|
|
self.assertEqual(output.rstrip(), b"True")
|
|
|
|
@support.requires_subprocess()
|
|
def test_env_var(self):
|
|
# empty env var
|
|
code = "import faulthandler; print(faulthandler.is_enabled())"
|
|
args = (sys.executable, "-c", code)
|
|
env = dict(os.environ)
|
|
env['PYTHONFAULTHANDLER'] = ''
|
|
env['PYTHONDEVMODE'] = ''
|
|
# don't use assert_python_ok() because it always enables faulthandler
|
|
output = subprocess.check_output(args, env=env)
|
|
self.assertEqual(output.rstrip(), b"False")
|
|
|
|
# non-empty env var
|
|
env = dict(os.environ)
|
|
env['PYTHONFAULTHANDLER'] = '1'
|
|
env['PYTHONDEVMODE'] = ''
|
|
output = subprocess.check_output(args, env=env)
|
|
self.assertEqual(output.rstrip(), b"True")
|
|
|
|
def check_dump_traceback(self, *, filename=None, fd=None):
|
|
"""
|
|
Explicitly call dump_traceback() function and check its output.
|
|
Raise an error if the output doesn't match the expected format.
|
|
"""
|
|
code = """
|
|
import faulthandler
|
|
|
|
filename = {filename!r}
|
|
fd = {fd}
|
|
|
|
def funcB():
|
|
if filename:
|
|
with open(filename, "wb") as fp:
|
|
faulthandler.dump_traceback(fp, all_threads=False)
|
|
elif fd is not None:
|
|
faulthandler.dump_traceback(fd,
|
|
all_threads=False)
|
|
else:
|
|
faulthandler.dump_traceback(all_threads=False)
|
|
|
|
def funcA():
|
|
funcB()
|
|
|
|
funcA()
|
|
"""
|
|
code = code.format(
|
|
filename=filename,
|
|
fd=fd,
|
|
)
|
|
if filename:
|
|
lineno = 9
|
|
elif fd is not None:
|
|
lineno = 11
|
|
else:
|
|
lineno = 14
|
|
expected = [
|
|
'Stack (most recent call first):',
|
|
' File "<string>", line %s in funcB' % lineno,
|
|
' File "<string>", line 17 in funcA',
|
|
' File "<string>", line 19 in <module>'
|
|
]
|
|
trace, exitcode = self.get_output(code, filename, fd)
|
|
self.assertEqual(trace, expected)
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
def test_dump_traceback(self):
|
|
self.check_dump_traceback()
|
|
|
|
def test_dump_traceback_file(self):
|
|
with temporary_filename() as filename:
|
|
self.check_dump_traceback(filename=filename)
|
|
|
|
@unittest.skipIf(sys.platform == "win32",
|
|
"subprocess doesn't support pass_fds on Windows")
|
|
def test_dump_traceback_fd(self):
|
|
with tempfile.TemporaryFile('wb+') as fp:
|
|
self.check_dump_traceback(fd=fp.fileno())
|
|
|
|
def test_truncate(self):
|
|
maxlen = 500
|
|
func_name = 'x' * (maxlen + 50)
|
|
truncated = 'x' * maxlen + '...'
|
|
code = """
|
|
import faulthandler
|
|
|
|
def {func_name}():
|
|
faulthandler.dump_traceback(all_threads=False)
|
|
|
|
{func_name}()
|
|
"""
|
|
code = code.format(
|
|
func_name=func_name,
|
|
)
|
|
expected = [
|
|
'Stack (most recent call first):',
|
|
' File "<string>", line 4 in %s' % truncated,
|
|
' File "<string>", line 6 in <module>'
|
|
]
|
|
trace, exitcode = self.get_output(code)
|
|
self.assertEqual(trace, expected)
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
def check_dump_traceback_threads(self, filename):
|
|
"""
|
|
Call explicitly dump_traceback(all_threads=True) and check the output.
|
|
Raise an error if the output doesn't match the expected format.
|
|
"""
|
|
code = """
|
|
import faulthandler
|
|
from threading import Thread, Event
|
|
import time
|
|
|
|
def dump():
|
|
if {filename}:
|
|
with open({filename}, "wb") as fp:
|
|
faulthandler.dump_traceback(fp, all_threads=True)
|
|
else:
|
|
faulthandler.dump_traceback(all_threads=True)
|
|
|
|
class Waiter(Thread):
|
|
# avoid blocking if the main thread raises an exception.
|
|
daemon = True
|
|
|
|
def __init__(self):
|
|
Thread.__init__(self)
|
|
self.running = Event()
|
|
self.stop = Event()
|
|
|
|
def run(self):
|
|
self.running.set()
|
|
self.stop.wait()
|
|
|
|
waiter = Waiter()
|
|
waiter.start()
|
|
waiter.running.wait()
|
|
dump()
|
|
waiter.stop.set()
|
|
waiter.join()
|
|
"""
|
|
code = code.format(filename=repr(filename))
|
|
output, exitcode = self.get_output(code, filename)
|
|
output = '\n'.join(output)
|
|
if filename:
|
|
lineno = 8
|
|
else:
|
|
lineno = 10
|
|
# When the traceback is dumped, the waiter thread may be in the
|
|
# `self.running.set()` call or in `self.stop.wait()`.
|
|
regex = r"""
|
|
^Thread 0x[0-9a-f]+ \(most recent call first\):
|
|
(?: File ".*threading.py", line [0-9]+ in [_a-z]+
|
|
){{1,3}} File "<string>", line (?:22|23) in run
|
|
File ".*threading.py", line [0-9]+ in _bootstrap_inner
|
|
File ".*threading.py", line [0-9]+ in _bootstrap
|
|
|
|
Current thread 0x[0-9a-f]+ \(most recent call first\):
|
|
File "<string>", line {lineno} in dump
|
|
File "<string>", line 28 in <module>$
|
|
"""
|
|
regex = dedent(regex.format(lineno=lineno)).strip()
|
|
self.assertRegex(output, regex)
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
def test_dump_traceback_threads(self):
|
|
self.check_dump_traceback_threads(None)
|
|
|
|
def test_dump_traceback_threads_file(self):
|
|
with temporary_filename() as filename:
|
|
self.check_dump_traceback_threads(filename)
|
|
|
|
def check_dump_traceback_later(self, repeat=False, cancel=False, loops=1,
|
|
*, filename=None, fd=None):
|
|
"""
|
|
Check how many times the traceback is written in timeout x 2.5 seconds,
|
|
or timeout x 3.5 seconds if cancel is True: 1, 2 or 3 times depending
|
|
on repeat and cancel options.
|
|
|
|
Raise an error if the output doesn't match the expect format.
|
|
"""
|
|
timeout_str = str(datetime.timedelta(seconds=TIMEOUT))
|
|
code = """
|
|
import faulthandler
|
|
import time
|
|
import sys
|
|
|
|
timeout = {timeout}
|
|
repeat = {repeat}
|
|
cancel = {cancel}
|
|
loops = {loops}
|
|
filename = {filename!r}
|
|
fd = {fd}
|
|
|
|
def func(timeout, repeat, cancel, file, loops):
|
|
for loop in range(loops):
|
|
faulthandler.dump_traceback_later(timeout, repeat=repeat, file=file)
|
|
if cancel:
|
|
faulthandler.cancel_dump_traceback_later()
|
|
time.sleep(timeout * 5)
|
|
faulthandler.cancel_dump_traceback_later()
|
|
|
|
if filename:
|
|
file = open(filename, "wb")
|
|
elif fd is not None:
|
|
file = sys.stderr.fileno()
|
|
else:
|
|
file = None
|
|
func(timeout, repeat, cancel, file, loops)
|
|
if filename:
|
|
file.close()
|
|
"""
|
|
code = code.format(
|
|
timeout=TIMEOUT,
|
|
repeat=repeat,
|
|
cancel=cancel,
|
|
loops=loops,
|
|
filename=filename,
|
|
fd=fd,
|
|
)
|
|
trace, exitcode = self.get_output(code, filename)
|
|
trace = '\n'.join(trace)
|
|
|
|
if not cancel:
|
|
count = loops
|
|
if repeat:
|
|
count *= 2
|
|
header = r'Timeout \(%s\)!\nThread 0x[0-9a-f]+ \(most recent call first\):\n' % timeout_str
|
|
regex = expected_traceback(17, 26, header, min_count=count)
|
|
self.assertRegex(trace, regex)
|
|
else:
|
|
self.assertEqual(trace, '')
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
def test_dump_traceback_later(self):
|
|
self.check_dump_traceback_later()
|
|
|
|
def test_dump_traceback_later_repeat(self):
|
|
self.check_dump_traceback_later(repeat=True)
|
|
|
|
def test_dump_traceback_later_cancel(self):
|
|
self.check_dump_traceback_later(cancel=True)
|
|
|
|
def test_dump_traceback_later_file(self):
|
|
with temporary_filename() as filename:
|
|
self.check_dump_traceback_later(filename=filename)
|
|
|
|
@unittest.skipIf(sys.platform == "win32",
|
|
"subprocess doesn't support pass_fds on Windows")
|
|
def test_dump_traceback_later_fd(self):
|
|
with tempfile.TemporaryFile('wb+') as fp:
|
|
self.check_dump_traceback_later(fd=fp.fileno())
|
|
|
|
@support.requires_resource('walltime')
|
|
def test_dump_traceback_later_twice(self):
|
|
self.check_dump_traceback_later(loops=2)
|
|
|
|
@unittest.skipIf(not hasattr(faulthandler, "register"),
|
|
"need faulthandler.register")
|
|
def check_register(self, filename=False, all_threads=False,
|
|
unregister=False, chain=False, fd=None):
|
|
"""
|
|
Register a handler displaying the traceback on a user signal. Raise the
|
|
signal and check the written traceback.
|
|
|
|
If chain is True, check that the previous signal handler is called.
|
|
|
|
Raise an error if the output doesn't match the expected format.
|
|
"""
|
|
signum = signal.SIGUSR1
|
|
code = """
|
|
import faulthandler
|
|
import os
|
|
import signal
|
|
import sys
|
|
|
|
all_threads = {all_threads}
|
|
signum = {signum:d}
|
|
unregister = {unregister}
|
|
chain = {chain}
|
|
filename = {filename!r}
|
|
fd = {fd}
|
|
|
|
def func(signum):
|
|
os.kill(os.getpid(), signum)
|
|
|
|
def handler(signum, frame):
|
|
handler.called = True
|
|
handler.called = False
|
|
|
|
if filename:
|
|
file = open(filename, "wb")
|
|
elif fd is not None:
|
|
file = sys.stderr.fileno()
|
|
else:
|
|
file = None
|
|
if chain:
|
|
signal.signal(signum, handler)
|
|
faulthandler.register(signum, file=file,
|
|
all_threads=all_threads, chain={chain})
|
|
if unregister:
|
|
faulthandler.unregister(signum)
|
|
func(signum)
|
|
if chain and not handler.called:
|
|
if file is not None:
|
|
output = file
|
|
else:
|
|
output = sys.stderr
|
|
print("Error: signal handler not called!", file=output)
|
|
exitcode = 1
|
|
else:
|
|
exitcode = 0
|
|
if filename:
|
|
file.close()
|
|
sys.exit(exitcode)
|
|
"""
|
|
code = code.format(
|
|
all_threads=all_threads,
|
|
signum=signum,
|
|
unregister=unregister,
|
|
chain=chain,
|
|
filename=filename,
|
|
fd=fd,
|
|
)
|
|
trace, exitcode = self.get_output(code, filename)
|
|
trace = '\n'.join(trace)
|
|
if not unregister:
|
|
if all_threads:
|
|
regex = r'Current thread 0x[0-9a-f]+ \(most recent call first\):\n'
|
|
else:
|
|
regex = r'Stack \(most recent call first\):\n'
|
|
regex = expected_traceback(14, 32, regex)
|
|
self.assertRegex(trace, regex)
|
|
else:
|
|
self.assertEqual(trace, '')
|
|
if unregister:
|
|
self.assertNotEqual(exitcode, 0)
|
|
else:
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
def test_register(self):
|
|
self.check_register()
|
|
|
|
def test_unregister(self):
|
|
self.check_register(unregister=True)
|
|
|
|
def test_register_file(self):
|
|
with temporary_filename() as filename:
|
|
self.check_register(filename=filename)
|
|
|
|
@unittest.skipIf(sys.platform == "win32",
|
|
"subprocess doesn't support pass_fds on Windows")
|
|
def test_register_fd(self):
|
|
with tempfile.TemporaryFile('wb+') as fp:
|
|
self.check_register(fd=fp.fileno())
|
|
|
|
def test_register_threads(self):
|
|
self.check_register(all_threads=True)
|
|
|
|
def test_register_chain(self):
|
|
self.check_register(chain=True)
|
|
|
|
@contextmanager
|
|
def check_stderr_none(self):
|
|
stderr = sys.stderr
|
|
try:
|
|
sys.stderr = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
yield
|
|
self.assertEqual(str(cm.exception), "sys.stderr is None")
|
|
finally:
|
|
sys.stderr = stderr
|
|
|
|
def test_stderr_None(self):
|
|
# Issue #21497: provide a helpful error if sys.stderr is None,
|
|
# instead of just an attribute error: "None has no attribute fileno".
|
|
with self.check_stderr_none():
|
|
faulthandler.enable()
|
|
with self.check_stderr_none():
|
|
faulthandler.dump_traceback()
|
|
with self.check_stderr_none():
|
|
faulthandler.dump_traceback_later(1e-3)
|
|
if hasattr(faulthandler, "register"):
|
|
with self.check_stderr_none():
|
|
faulthandler.register(signal.SIGUSR1)
|
|
|
|
@unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
|
|
def test_raise_exception(self):
|
|
for exc, name in (
|
|
('EXCEPTION_ACCESS_VIOLATION', 'access violation'),
|
|
('EXCEPTION_INT_DIVIDE_BY_ZERO', 'int divide by zero'),
|
|
('EXCEPTION_STACK_OVERFLOW', 'stack overflow'),
|
|
):
|
|
self.check_windows_exception(f"""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._raise_exception(faulthandler._{exc})
|
|
""",
|
|
3,
|
|
name)
|
|
|
|
@unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
|
|
def test_ignore_exception(self):
|
|
for exc_code in (
|
|
0xE06D7363, # MSC exception ("Emsc")
|
|
0xE0434352, # COM Callable Runtime exception ("ECCR")
|
|
):
|
|
code = f"""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._raise_exception({exc_code})
|
|
"""
|
|
code = dedent(code)
|
|
output, exitcode = self.get_output(code)
|
|
self.assertEqual(output, [])
|
|
self.assertEqual(exitcode, exc_code)
|
|
|
|
@unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
|
|
def test_raise_nonfatal_exception(self):
|
|
# These exceptions are not strictly errors. Letting
|
|
# faulthandler display the traceback when they are
|
|
# raised is likely to result in noise. However, they
|
|
# may still terminate the process if there is no
|
|
# handler installed for them (which there typically
|
|
# is, e.g. for debug messages).
|
|
for exc in (
|
|
0x00000000,
|
|
0x34567890,
|
|
0x40000000,
|
|
0x40001000,
|
|
0x70000000,
|
|
0x7FFFFFFF,
|
|
):
|
|
output, exitcode = self.get_output(f"""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler._raise_exception(0x{exc:x})
|
|
"""
|
|
)
|
|
self.assertEqual(output, [])
|
|
# On Windows older than 7 SP1, the actual exception code has
|
|
# bit 29 cleared.
|
|
self.assertIn(exitcode,
|
|
(exc, exc & ~0x10000000))
|
|
|
|
@unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
|
|
def test_disable_windows_exc_handler(self):
|
|
code = dedent("""
|
|
import faulthandler
|
|
faulthandler.enable()
|
|
faulthandler.disable()
|
|
code = faulthandler._EXCEPTION_ACCESS_VIOLATION
|
|
faulthandler._raise_exception(code)
|
|
""")
|
|
output, exitcode = self.get_output(code)
|
|
self.assertEqual(output, [])
|
|
self.assertEqual(exitcode, 0xC0000005)
|
|
|
|
def test_cancel_later_without_dump_traceback_later(self):
|
|
# bpo-37933: Calling cancel_dump_traceback_later()
|
|
# without dump_traceback_later() must not segfault.
|
|
code = dedent("""
|
|
import faulthandler
|
|
faulthandler.cancel_dump_traceback_later()
|
|
""")
|
|
output, exitcode = self.get_output(code)
|
|
self.assertEqual(output, [])
|
|
self.assertEqual(exitcode, 0)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|