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faulthandler: add Windows exception handler

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Issue #23848: On Windows, faulthandler.enable() now also installs an exception
handler to dump the traceback of all Python threads on any Windows exception,
not only on UNIX signals (SIGSEGV, SIGFPE, SIGABRT).
This commit is contained in:
Victor Stinner 2016-03-23 10:39:17 +01:00
parent bd31b7c483
commit 404cdc5a92
5 changed files with 253 additions and 77 deletions
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62
Lib/test/test_faulthandler.py
View file

@ -23,6 +23,7 @@ except ImportError:
_testcapi = None
TIMEOUT = 0.5
MS_WINDOWS = (os.name == 'nt')
def expected_traceback(lineno1, lineno2, header, min_count=1):
regex = header
@ -76,9 +77,9 @@ class FaultHandlerTests(unittest.TestCase):
output = output.decode('ascii', 'backslashreplace')
return output.splitlines(), exitcode
def check_fatal_error(self, code, line_number, name_regex,
filename=None, all_threads=True, other_regex=None,
fd=None, know_current_thread=True):
def check_error(self, code, line_number, fatal_error, *,
filename=None, all_threads=True, other_regex=None,
fd=None, know_current_thread=True):
"""
Check that the fault handler for fatal errors is enabled and check the
traceback from the child process output.
@ -93,14 +94,14 @@ class FaultHandlerTests(unittest.TestCase):
else:
header = 'Stack'
regex = """
^Fatal Python error: {name}
^{fatal_error}
{header} \(most recent call first\):
File "<string>", line {lineno} in <module>
"""
regex = dedent(regex.format(
lineno=line_number,
name=name_regex,
fatal_error=fatal_error,
header=header)).strip()
if other_regex:
regex += '|' + other_regex
@ -109,17 +110,36 @@ class FaultHandlerTests(unittest.TestCase):
self.assertRegex(output, regex)
self.assertNotEqual(exitcode, 0)
def check_fatal_error(self, code, line_number, name_regex, **kw):
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 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):
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)')
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')
def test_sigsegv(self):
self.check_fatal_error("""
@ -708,6 +728,22 @@ class FaultHandlerTests(unittest.TestCase):
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)
if __name__ == "__main__":
unittest.main()