faulthandler is now part of Python 3.3
Hi, I pushed my faulthandler module into the default branch (Python 3.3). Since one week, I fixed a lot of bugs (platform issues), improved the tests and Antoine wrote a new implementation of dump_backtraces_later() using a thread (instead of SIGALRM+alarm()). It should now work on all platforms (but register() is not available on Windows). Use "python -X faulthandler" or "PYTHONFAULTHANDLER=1 python" to install the fault handler at startup (catch segfaults and other fatal errors). You can also register a signal (e.g. SIGUSR1) to dump the traceback on this signal. The latest added feature is to be able to the dump the traceback after a timeout and exit the process: we may use it on regrtest.py to learn more about test_multiprocess and test_threadsignals hangs. Issue #11393 has a patch implementing this issue: add --timeout option to regrtest.py. You can also just dump the traceback after the timeout without exiting. Py_FatalError() always print the Python traceback (except if an exception was raised: print the exception with its traceback). For more information, read the doc: http://docs.python.org/dev/library/faulthandler.html Please tell me if you have any issue related to faulthandler. -- If you get "undefined reference to `_PyFaulthandler_Init'" compiler error, copy Modules/Setup.dist to Modules/Setup (cp Modules/Setup.dist Modules/Setup). test_faulthandler hangs on AMD64 Gentoo Wide 3.x and AMD64 OpenIndiana 3.x. It looks to be related to the stack overflow test (the stack is maybe not limited on these buildbots?). I have a patch, but I cannot test it because these buildbots are dead (oops, sorry!). Most buildbots are red because a regression in test_logging (since 2 days): I disabled temporary the test (issue #11557), I hope that the situation will be better in a few hours. Thank you Antoine for your reviews! Victor
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/30/2011 09:54 PM, Victor Stinner wrote:
Hi,
I pushed my faulthandler module into the default branch (Python 3.3). Since one week, I fixed a lot of bugs (platform issues), improved the tests and Antoine wrote a new implementation of dump_backtraces_later() using a thread (instead of SIGALRM+alarm()). It should now work on all platforms (but register() is not available on Windows).
Use "python -X faulthandler" or "PYTHONFAULTHANDLER=1 python" to install the fault handler at startup (catch segfaults and other fatal errors).
You can also register a signal (e.g. SIGUSR1) to dump the traceback on this signal.
The latest added feature is to be able to the dump the traceback after a timeout and exit the process: we may use it on regrtest.py to learn more about test_multiprocess and test_threadsignals hangs. Issue #11393 has a patch implementing this issue: add --timeout option to regrtest.py. You can also just dump the traceback after the timeout without exiting.
Py_FatalError() always print the Python traceback (except if an exception was raised: print the exception with its traceback).
For more information, read the doc: http://docs.python.org/dev/library/faulthandler.html
Please tell me if you have any issue related to faulthandler.
--
If you get "undefined reference to `_PyFaulthandler_Init'" compiler error, copy Modules/Setup.dist to Modules/Setup (cp Modules/Setup.dist Modules/Setup).
test_faulthandler hangs on AMD64 Gentoo Wide 3.x and AMD64 OpenIndiana 3.x. It looks to be related to the stack overflow test (the stack is maybe not limited on these buildbots?). I have a patch, but I cannot test it because these buildbots are dead (oops, sorry!).
Most buildbots are red because a regression in test_logging (since 2 days): I disabled temporary the test (issue #11557), I hope that the situation will be better in a few hours.
Thank you Antoine for your reviews!
Thanks very much for you hard work on this cool new feature. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tseaver@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2Ud/gACgkQ+gerLs4ltQ6BVACgo822OajfnxbVQInroX8q5L7B wX0AoMpEJLNk0ffEBJs+C2CDXiaIz+yf =rf2C -----END PGP SIGNATURE-----
2011/3/31 Tres Seaver <tseaver@palladion.com>:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
On 03/30/2011 09:54 PM, Victor Stinner wrote:
Hi,
I pushed my faulthandler module into the default branch (Python 3.3). Since one week, I fixed a lot of bugs (platform issues), improved the tests and Antoine wrote a new implementation of dump_backtraces_later() using a thread (instead of SIGALRM+alarm()). It should now work on all platforms (but register() is not available on Windows).
Use "python -X faulthandler" or "PYTHONFAULTHANDLER=1 python" to install the fault handler at startup (catch segfaults and other fatal errors).
You can also register a signal (e.g. SIGUSR1) to dump the traceback on this signal.
The latest added feature is to be able to the dump the traceback after a timeout and exit the process: we may use it on regrtest.py to learn more about test_multiprocess and test_threadsignals hangs. Issue #11393 has a patch implementing this issue: add --timeout option to regrtest.py. You can also just dump the traceback after the timeout without exiting.
Py_FatalError() always print the Python traceback (except if an exception was raised: print the exception with its traceback).
For more information, read the doc: http://docs.python.org/dev/library/faulthandler.html
Please tell me if you have any issue related to faulthandler.
--
If you get "undefined reference to `_PyFaulthandler_Init'" compiler error, copy Modules/Setup.dist to Modules/Setup (cp Modules/Setup.dist Modules/Setup).
test_faulthandler hangs on AMD64 Gentoo Wide 3.x and AMD64 OpenIndiana 3.x. It looks to be related to the stack overflow test (the stack is maybe not limited on these buildbots?). I have a patch, but I cannot test it because these buildbots are dead (oops, sorry!).
Most buildbots are red because a regression in test_logging (since 2 days): I disabled temporary the test (issue #11557), I hope that the situation will be better in a few hours.
Thank you Antoine for your reviews!
Thanks very much for you hard work on this cool new feature.
Furthermore, let's hope we don't have to use it much! :) -- Regards, Benjamin
Victor Stinner wrote:
I pushed my faulthandler module into the default branch (Python 3.3). Since one week, I fixed a lot of bugs (platform issues), improved the tests and Antoine wrote a new implementation of dump_backtraces_later() using a thread (instead of SIGALRM+alarm()). It should now work on all platforms (but register() is not available on Windows).
I apologize -- I'm not going to have time to test this myself, and I'm really curious to know if it works: Issue11603 describes a problem where Python either hangs or crashes depending on Python version/OS version... does the faulthandler work for this problem? Remodeling-at-home-and-swamped-at-work-ly yours, ~Ethan~
participants (4)
-
Benjamin Peterson -
Ethan Furman -
Tres Seaver -
Victor Stinner