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output = open({filename}, 'wb')
faulthandler.enable(output)
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import faulthandler
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sys.stdlib_module_names = frozenset()
faulthandler.enable()
faulthandler._sigsegv()
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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()
rU rq N Stack (most recent call first):z# File "<string>", line %s in funcBz# File "<string>", line 17 in funcAz& File "<string>", line 19 in <module>r r rJ r; )rA r# rC rB rY expectedtracerH s r check_dump_tracebackz&FaultHandlerTests.check_dump_traceback s
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import faulthandler
def {func_name}():
faulthandler.dump_traceback(all_threads=False)
{func_name}()
) func_namer z File "<string>", line 4 in %sz% File "<string>", line 6 in <module>r r )rA maxlenr truncatedrB r r rH s r
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Call explicitly dump_traceback(all_threads=True) and check the output.
Raise an error if the output doesn't match the expected format.
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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()
r" r
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^Thread 0x[0-9a-f]+ \(most recent call first\):
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File ".*threading.py", line [0-9]+ in _bootstrap
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File "<string>", line 28 in <module>$
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Check how many times the traceback is written in timeout x 2.5 seconds,
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)secondsa
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()
)timeoutrepeatcancelloopsr# rC r
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signal and check the written traceback.
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Raise an error if the output doesn't match the expected format.
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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)
)rK signum
unregisterchainr# rC r
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import faulthandler
faulthandler.enable()
faulthandler._raise_exception(faulthandler._r rg )rd )rA excr s r test_raise_exceptionz&FaultHandlerTests.test_raise_exception- sb
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import faulthandler
faulthandler.enable()
faulthandler._raise_exception(z)
r rJ r; )rA exc_coderB rF rH s r test_ignore_exceptionz'FaultHandlerTests.test_ignore_exception< s
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import faulthandler
faulthandler.enable()
faulthandler._raise_exception(0xr r i)rJ r; r )rA r> rF rH s r test_raise_nonfatal_exceptionz/FaultHandlerTests.test_raise_nonfatal_exceptionL s
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import faulthandler
faulthandler.enable()
faulthandler.disable()
code = faulthandler._EXCEPTION_ACCESS_VIOLATION
faulthandler._raise_exception(code)
l rA rA rB rF rH s r test_disable_windows_exc_handlerz2FaultHandlerTests.test_disable_windows_exc_handlerh s`
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import faulthandler
faulthandler.cancel_dump_traceback_later()
r rA rG s r .test_cancel_later_without_dump_traceback_laterz@FaultHandlerTests.test_cancel_later_without_dump_traceback_lateru sb
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