diff options
Diffstat (limited to 'Lib/test/test_faulthandler.py')
| -rw-r--r-- | Lib/test/test_faulthandler.py | 184 |
1 files changed, 119 insertions, 65 deletions
diff --git a/Lib/test/test_faulthandler.py b/Lib/test/test_faulthandler.py index e68a09e1811..bbefae79023 100644 --- a/Lib/test/test_faulthandler.py +++ b/Lib/test/test_faulthandler.py @@ -17,6 +17,10 @@ try: HAVE_THREADS = True except ImportError: HAVE_THREADS = False +try: + import _testcapi +except ImportError: + _testcapi = None TIMEOUT = 0.5 @@ -38,7 +42,7 @@ def temporary_filename(): support.unlink(filename) class FaultHandlerTests(unittest.TestCase): - def get_output(self, code, filename=None): + 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). @@ -49,8 +53,11 @@ class FaultHandlerTests(unittest.TestCase): thread XXX". """ code = dedent(code).strip() + pass_fds = [] + if fd is not None: + pass_fds.append(fd) with support.SuppressCrashReport(): - process = script_helper.spawn_python('-c', code) + process = script_helper.spawn_python('-c', code, pass_fds=pass_fds) stdout, stderr = process.communicate() exitcode = process.wait() output = support.strip_python_stderr(stdout) @@ -60,13 +67,20 @@ class FaultHandlerTests(unittest.TestCase): 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') output = re.sub('Current thread 0x[0-9a-f]+', 'Current thread XXX', output) return output.splitlines(), exitcode def check_fatal_error(self, code, line_number, name_regex, - filename=None, all_threads=True, other_regex=None): + filename=None, all_threads=True, other_regex=None, + fd=None): """ Check that the fault handler for fatal errors is enabled and check the traceback from the child process output. @@ -89,7 +103,7 @@ class FaultHandlerTests(unittest.TestCase): header=re.escape(header))).strip() if other_regex: regex += '|' + other_regex - output, exitcode = self.get_output(code, filename) + output, exitcode = self.get_output(code, filename=filename, fd=fd) output = '\n'.join(output) self.assertRegex(output, regex) self.assertNotEqual(exitcode, 0) @@ -135,26 +149,32 @@ class FaultHandlerTests(unittest.TestCase): 3, 'Floating point exception') - @unittest.skipIf(not hasattr(faulthandler, '_sigbus'), - "need faulthandler._sigbus()") + @unittest.skipIf(_testcapi is None, 'need _testcapi') + @unittest.skipUnless(hasattr(signal, 'SIGBUS'), 'need signal.SIGBUS') def test_sigbus(self): self.check_fatal_error(""" + import _testcapi import faulthandler + import signal + faulthandler.enable() - faulthandler._sigbus() + _testcapi.raise_signal(signal.SIGBUS) """, - 3, + 6, 'Bus error') - @unittest.skipIf(not hasattr(faulthandler, '_sigill'), - "need faulthandler._sigill()") + @unittest.skipIf(_testcapi is None, 'need _testcapi') + @unittest.skipUnless(hasattr(signal, 'SIGILL'), 'need signal.SIGILL') def test_sigill(self): self.check_fatal_error(""" + import _testcapi import faulthandler + import signal + faulthandler.enable() - faulthandler._sigill() + _testcapi.raise_signal(signal.SIGILL) """, - 3, + 6, 'Illegal instruction') def test_fatal_error(self): @@ -201,6 +221,19 @@ class FaultHandlerTests(unittest.TestCase): 'Segmentation fault', filename=filename) + 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) + def test_enable_single_thread(self): self.check_fatal_error(""" import faulthandler @@ -287,7 +320,7 @@ class FaultHandlerTests(unittest.TestCase): output = subprocess.check_output(args, env=env) self.assertEqual(output.rstrip(), b"True") - def check_dump_traceback(self, filename): + 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. @@ -295,10 +328,16 @@ class FaultHandlerTests(unittest.TestCase): code = """ import faulthandler + filename = {filename!r} + fd = {fd} + def funcB(): - if {has_filename}: - with open({filename}, "wb") as fp: + 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) @@ -308,29 +347,35 @@ class FaultHandlerTests(unittest.TestCase): funcA() """ code = code.format( - filename=repr(filename), - has_filename=bool(filename), + filename=filename, + fd=fd, ) if filename: - lineno = 6 + lineno = 9 + elif fd is not None: + lineno = 12 else: - lineno = 8 + lineno = 14 expected = [ 'Stack (most recent call first):', ' File "<string>", line %s in funcB' % lineno, - ' File "<string>", line 11 in funcA', - ' File "<string>", line 13 in <module>' + ' File "<string>", line 17 in funcA', + ' File "<string>", line 19 in <module>' ] - trace, exitcode = self.get_output(code, filename) + 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(None) + self.check_dump_traceback() def test_dump_traceback_file(self): with temporary_filename() as filename: - self.check_dump_traceback(filename) + self.check_dump_traceback(filename=filename) + + 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 @@ -423,7 +468,10 @@ class FaultHandlerTests(unittest.TestCase): with temporary_filename() as filename: self.check_dump_traceback_threads(filename) - def _check_dump_traceback_later(self, repeat, cancel, filename, loops): + @unittest.skipIf(not hasattr(faulthandler, 'dump_traceback_later'), + 'need faulthandler.dump_traceback_later()') + 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 @@ -435,6 +483,14 @@ class FaultHandlerTests(unittest.TestCase): 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): @@ -444,16 +500,14 @@ class FaultHandlerTests(unittest.TestCase): time.sleep(timeout * 5) faulthandler.cancel_dump_traceback_later() - timeout = {timeout} - repeat = {repeat} - cancel = {cancel} - loops = {loops} - if {has_filename}: - file = open({filename}, "wb") + 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 file is not None: + if filename: file.close() """ code = code.format( @@ -461,8 +515,8 @@ class FaultHandlerTests(unittest.TestCase): repeat=repeat, cancel=cancel, loops=loops, - has_filename=bool(filename), - filename=repr(filename), + filename=filename, + fd=fd, ) trace, exitcode = self.get_output(code, filename) trace = '\n'.join(trace) @@ -472,27 +526,12 @@ class FaultHandlerTests(unittest.TestCase): if repeat: count *= 2 header = r'Timeout \(%s\)!\nThread 0x[0-9a-f]+ \(most recent call first\):\n' % timeout_str - regex = expected_traceback(9, 20, header, min_count=count) + regex = expected_traceback(17, 26, header, min_count=count) self.assertRegex(trace, regex) else: self.assertEqual(trace, '') self.assertEqual(exitcode, 0) - @unittest.skipIf(not hasattr(faulthandler, 'dump_traceback_later'), - 'need faulthandler.dump_traceback_later()') - def check_dump_traceback_later(self, repeat=False, cancel=False, - file=False, twice=False): - if twice: - loops = 2 - else: - loops = 1 - if file: - with temporary_filename() as filename: - self._check_dump_traceback_later(repeat, cancel, - filename, loops) - else: - self._check_dump_traceback_later(repeat, cancel, None, loops) - def test_dump_traceback_later(self): self.check_dump_traceback_later() @@ -503,15 +542,20 @@ class FaultHandlerTests(unittest.TestCase): self.check_dump_traceback_later(cancel=True) def test_dump_traceback_later_file(self): - self.check_dump_traceback_later(file=True) + with temporary_filename() as filename: + self.check_dump_traceback_later(filename=filename) + + def test_dump_traceback_later_fd(self): + with tempfile.TemporaryFile('wb+') as fp: + self.check_dump_traceback_later(fd=fp.fileno()) def test_dump_traceback_later_twice(self): - self.check_dump_traceback_later(twice=True) + 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): + unregister=False, chain=False, fd=None): """ Register a handler displaying the traceback on a user signal. Raise the signal and check the written traceback. @@ -527,6 +571,13 @@ class FaultHandlerTests(unittest.TestCase): import signal import sys + all_threads = {all_threads} + signum = {signum} + unregister = {unregister} + chain = {chain} + filename = {filename!r} + fd = {fd} + def func(signum): os.kill(os.getpid(), signum) @@ -534,19 +585,16 @@ class FaultHandlerTests(unittest.TestCase): handler.called = True handler.called = False - exitcode = 0 - signum = {signum} - unregister = {unregister} - chain = {chain} - - if {has_filename}: - file = open({filename}, "wb") + 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}) + all_threads=all_threads, chain={chain}) if unregister: faulthandler.unregister(signum) func(signum) @@ -557,17 +605,19 @@ class FaultHandlerTests(unittest.TestCase): output = sys.stderr print("Error: signal handler not called!", file=output) exitcode = 1 - if file is not None: + else: + exitcode = 0 + if filename: file.close() sys.exit(exitcode) """ code = code.format( - filename=repr(filename), - has_filename=bool(filename), 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) @@ -576,7 +626,7 @@ class FaultHandlerTests(unittest.TestCase): regex = 'Current thread XXX \(most recent call first\):\n' else: regex = 'Stack \(most recent call first\):\n' - regex = expected_traceback(7, 28, regex) + regex = expected_traceback(14, 32, regex) self.assertRegex(trace, regex) else: self.assertEqual(trace, '') @@ -595,6 +645,10 @@ class FaultHandlerTests(unittest.TestCase): with temporary_filename() as filename: self.check_register(filename=filename) + 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) |