Debugging PyTango using GDB python

# 7 years ago
gnyiri	hi, have you ever tried debugging a device server written in Python (PyTango)? I managed to attach the debugger (gdb) to the device server process (like described in wiki article https://wiki.python.org/moin/DebuggingWithGdb) The standard gdb commands work fine but all the py-{cmd} ones fail with following message: `(gdb) py-bt #37 (<_Util at remote 0x7f39801300c0>,) Python Exception <type 'exceptions.AttributeError'> 'PyTupleObjectPtr' object has no attribute 'current_line': Error occurred in Python command: 'PyTupleObjectPtr' object has no attribute 'current_line'` The way of attaching the debugger to the process: `~/gdb python <pid of ds process> ~/bt # -> shows full backtrace ~/py-bt # -> fails with above error message` I also tried the internal debugger of PyCharm IDE but it doesn't seem to be working either. Thanks in advance, Gergely Edited 7 years ago

# 7 years ago

hi,

have you ever tried debugging a device server written in Python (PyTango)?

I managed to attach the debugger (gdb) to the device server process (like described in wiki article https://wiki.python.org/moin/DebuggingWithGdb)

The standard gdb commands work fine but all the py-{cmd} ones fail with following message:


(gdb) py-bt
#37 (<_Util at remote 0x7f39801300c0>,)
Python Exception <type 'exceptions.AttributeError'> 'PyTupleObjectPtr' object has no attribute 'current_line': 
Error occurred in Python command: 'PyTupleObjectPtr' object has no attribute 'current_line'

The way of attaching the debugger to the process:


~/gdb python <pid of ds process>
~/bt # -> shows full backtrace
~/py-bt # -> fails with above error message

I also tried the internal debugger of PyCharm IDE but it doesn't seem to be working either.

Thanks in advance,
Gergely

Edited 7 years ago

# 7 years ago
Vincent M	Hi Gergely, I've been using gdb and py-bt to debug segfaults and it worked fine, so I don't think your problem is related to pytango. Hope that helps, /Vincent

# 7 years ago
TCoutinho	Hi Gergely, gnyiri have you ever tried debugging a device server written in Python (PyTango)? Yes, you can use pdb, winpdb. Other introspection techniques you can use are: spawn rfoo´s rconsole in the server and connect to it if you use gevent mode, spawn a gevent backdoor and connect to it

# 7 years ago
gnyiri	thanks for your answers! The issue is probably linked to my particular environment since I cannot debug other (not pytango) mixed code either. Gergely