Re: Segmentation fault only on Iinux
Unfortunately (i guess), I am not doing any XML. However, I am taking the previous suggestion of putting print lines in every other line of my code and then seeing where it crashes. Hopefully, that will solve the problem. thanks for the suggestions everybody -- Kiran Frank Millman wrote: Kiran wrote: Hello All, In my program, I have a main thread which is the GUI (wxPython) and then a thread which goes and reads data from a socket. The reason this is in a different thread is because the data might take some time to come back, and I want to have the GUI to be responsive during this wait. When I run my program in Linux, a segmentation fault occurs. When I run it in Windows XP, it works just fine. Are you doing any xml processing? If so, it may be the same problem as described in this recent post - http://tinyurl.com/l3nr7 Frank Millman -- http://mail.python.org/mailman/listinfo/python-list
Segmentation fault only on Iinux
Hello All, In my program, I have a main thread which is the GUI (wxPython) and then a thread which goes and reads data from a socket. The reason this is in a different thread is because the data might take some time to come back, and I want to have the GUI to be responsive during this wait. When I run my program in Linux, a segmentation fault occurs. When I run it in Windows XP, it works just fine. The main thing that would be of interest is as follows: The segmentation fault does NOT occur if I disable the threads and read the data all in 1 thread (the main thread [gui's]). This leads me to believe it is some sort of threading problem related to linux. However, I personally dont think that it can be something wrong with my code, since my program runs perfectly fine in WindowsXP. I am also carefully protecting data that my threads share with the MainGUI using a Queue and also a semaphore lock. I know this is kind of hard to answer without any code, but would anybody know of some kind of issue such as this where there is some threading problems with Linux and not Windows. I am happy to send the code to anybody who wishes to see it. I havent posted it here because it is kind of lengthy. Also, I should note that I think we are running Linux Kernel 2.4 thanks a lot for your help, Kiran -- http://mail.python.org/mailman/listinfo/python-list
Re: Segmentation fault only on Iinux
if you don't know exactly which line of code causes the segfault, use print statements to determine that. then try to either redesign/refactor so that line isn't necessary, or protect its operation somehow. if you do know, tell us what it is and we might not need to see all your code. Kiran wrote: Hello All, In my program, I have a main thread which is the GUI (wxPython) and then a thread which goes and reads data from a socket. The reason this is in a different thread is because the data might take some time to come back, and I want to have the GUI to be responsive during this wait. When I run my program in Linux, a segmentation fault occurs. When I run it in Windows XP, it works just fine. The main thing that would be of interest is as follows: The segmentation fault does NOT occur if I disable the threads and read the data all in 1 thread (the main thread [gui's]). This leads me to believe it is some sort of threading problem related to linux. However, I personally dont think that it can be something wrong with my code, since my program runs perfectly fine in WindowsXP. I am also carefully protecting data that my threads share with the MainGUI using a Queue and also a semaphore lock. I know this is kind of hard to answer without any code, but would anybody know of some kind of issue such as this where there is some threading problems with Linux and not Windows. I am happy to send the code to anybody who wishes to see it. I havent posted it here because it is kind of lengthy. Also, I should note that I think we are running Linux Kernel 2.4 thanks a lot for your help, Kiran -- http://mail.python.org/mailman/listinfo/python-list
Re: Segmentation fault only on Iinux
Kiran wrote: Hello All, In my program, I have a main thread which is the GUI (wxPython) and then a thread which goes and reads data from a socket. The reason this is in a different thread is because the data might take some time to come back, and I want to have the GUI to be responsive during this wait. When I run my program in Linux, a segmentation fault occurs. When I run it in Windows XP, it works just fine. Are you doing any xml processing? If so, it may be the same problem as described in this recent post - http://tinyurl.com/l3nr7 Frank Millman -- http://mail.python.org/mailman/listinfo/python-list
