Getting the ERROR "Undefined command: "python ". Try "help". when used gdb for python debug

Question

I am getting the below error when tried to use gdb for debugging python extensions code .I created gdbinit file in my home directory copied gdbinit file from MISC/gdbinit

(gdb) source gdbinit  
(gdb) python  
Undefined command: "python".  Try "help".

I don't know where i am going wrong .I have gdb6.3 version .

use pdb to debug python code .. docs.python.org/library/pdb.html — avasal
– avasal, Commented Jul 13, 2012 at 5:14

user149341 · Accepted Answer · 2012-07-13 05:13:55Z

3

I think you've gotten lost somewhere. gdb is not particularly useful for debugging Python code.

On the faint chance that you're actually trying to debug a Python C extension or something, use run to start the Python interpreter (after selecting the Python interpreter using file /usr/bin/python or similar). See http://wiki.python.org/moin/DebuggingWithGdb for details.

answered Jul 13, 2012 at 5:13

user149341

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1 Comment

jaysh Over a year ago

sorry,I am trying to debug Python extensions using the gdb debugger. I have used pdb debugger for debugging pure python code .I am following the link wiki.python.org/moin/DebuggingWithGdb but something I am doing wrong not sure .What is required to get a Python interpreter with Debugging symbol for RedHat .How can i ensure about this

octopusgrabbus · Accepted Answer · 2012-07-13 20:35:57Z

2

You would need gdb 7.0 to debug a Python program. Python support was not added until that version of gdb.

edited Jul 13, 2012 at 20:35

octopusgrabbus

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answered Jul 13, 2012 at 14:29

matt

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5 Comments

jaysh Over a year ago

Is gdb7.0 and higher versions support python 2.7 ?

matt Over a year ago

@jaysh Yeah, I believe 2.6 and 2.7 are the versions of python currently supported

jaysh Over a year ago

I gone through this link misspent.wordpress.com/2012/03/24/… Here they have mentioned about Python 3.2 version usage with gdb .I am not sure we can use gdb7.0 with Python 2.4 or python2.7

matt Over a year ago

@jaysh should work fine, from gdb/README "The oldest version of Python supported by GDB is 2.4." apparently I misremembered this as 2.6. As for your link python version 3.2 adds pretty printers that can be used from gdb when doing e.g 'print somePyListObject' I don't believe gdb's python support works with python 3.x though, so these scripts probably actually run in an older version of python than 3.x. So to use those scripts in particular you probably need both 2.something and 3.2.

jaysh Over a year ago

Thanks Matt and all will be trying and let you know if its work for me

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