gdb: unrecognised option '--nh' about pyringe

[TehMillhouse]

Of all the flags that are given to gdb, I wouldn't have expected --nh to be a problem on other distros. For the time being, could you try the following for starting the debugger:

import pyringe
pyringe.inferior._GDB_ARGS.remove('--nh')
pyringe.interact()

I'll try to think of a generic way to get this to work, in the meantime, knowing which flags cause problems on some distros will help.

[andrewmichaelsmith]

Thanks, that workaround did the trick. I'll try it on some other distros and let you know if I come across any more.

[mckelvin]

I come across the same issue, but the trick does not works.

In [1]: import pyringe

In [2]: pyringe.inferior._GDB_ARGS
Out[2]: ['gdb', '--nh', '--nw', '--quiet', '--batch-silent']

In [3]: pyringe.inferior._GDB_ARGS.remove('--nh')

In [4]: pyringe.interact()
Pyringe (Python 2.7.5) on linux2
For a list of debugger commands, try "help()". (python's help is available as pyhelp.)
==> pid:[None] #threads:[0] current thread:[None]
In : attach(10987)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/repl.py", line 157, in Attach
    self.inferior.Reinit(pid)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 418, in Reinit
    self.__init__(pid, auto_symfile_loading)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 390, in __init__
    self.StartGdb()
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 437, in StartGdb
    self._gdb.Attach(self.position)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 181, in <lambda>
    return lambda *args, **kwargs: self._Execute(name, *args, **kwargs)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 277, in _Execute
    result_string = self._Recv(timeout)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/inferior.py", line 362, in _Recv
    raise ProxyError(exc_text)
ProxyError:
-----------------------------------
Error occurred within GdbService:
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 652, in <module>
    serv.EvalLoop()
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 274, in EvalLoop
    while self._AcceptRPC():
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 293, in _AcceptRPC
    rpc_result = getattr(self, request['func'])(*request['args'])
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 429, in Attach
    self.selected_tstate = self._ThreadPtrs(pos)[0]
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 454, in _ThreadPtrs
    self.EnsureGdbPosition(position[0], None, None)
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 333, in EnsureGdbPosition
    if not self.IsAttached():
  File "/home/username/.local/lib64/python2.7/site-packages/pyringe/payload/gdb_service.py", line 366, in IsAttached
    inf = gdb.selected_inferior()
AttributeError: 'module' object has no attribute 'selected_inferior'

GNU gdb (Gentoo 7.3.1 p2) 7.3.1
Linux hostname 3.0.36-gentoo

[TehMillhouse]

@mckelvin Your issue seems to be a different one. Digging in the gdb release schedule and the gdb changelog (first copy I could find online, search for the patch "PR Python/12692"), it looks like while python scripting was introduced in gdb 7.3, significant portions of the python API were only added after its release.

I will bump the required version of gdb to 7.4. Try getting a more recent version of gdb, that should fix the issue you're seeing.

[devunt]

--nh flag was introduced in gdb 7.6.1 stable (actually 7.6-1 unstable), but Ubuntu precise's official repo have gdb 7.4

[TehMillhouse]

@devunt Thanks for tracking this change down. I finally got around to adding a quick version check. Shouldn't be an issue anymore since 8fce35c.