[Python-Dev] Trap SIGSEGV and SIGFPE
rhamph at gmail.com
Wed Dec 10 19:59:09 CET 2008
On Wed, Dec 10, 2008 at 11:37 AM, Victor Stinner
<victor.stinner at haypocalc.com> wrote:
> Oh, I forgot the issue URL:
> I also attached an example of catching segfaults.
>> > I published a new version of my fault handler: it installs an handler for
>> > signals SIGFPE and SIGSEGV. Using it, it's possible to catch them and
>> > continue the execution of your Python program. Example:
>> This will of course leave the program in an undefined state. It is
>> very likely to crash again, emit garbage, hang, or otherwise be
> Recover after a segfault is dangerous, but my first goal was to get the Python
> backtrace instead just one line: "Segmentation fault". It helps a lot for
It's possible to print the Python stack purely from C, without
invoking any Python code. Even better, you could print the C stack
while you're at it! Doing that in a signal handler, and then killing
the process, could be seriously considered.
Take a look at http://www.linuxjournal.com/article/6391 . You'll
probably need #ifdef's to only use it on certain supported platforms,
and probably disable it by default anyway (configure option? Not
sure). Still, it'd be useful to have it there.
Adam Olsen, aka Rhamphoryncus
More information about the Python-Dev