[lldb-dev] Issue with Launch API

[zephyr git]

Hi,

I'm using the SBTarget.Launch() API in Python:

process = target.Launch(self.dbg.GetListener(), ['a','b'], env, stdin,
'stdour.txt, 'stderr.txt', os.getcwd(), 0 , True, err)

I got the following error:

...
  File "/home/media/llvm/lib/python2.7/site-packages/lldb/__init__.py",
line 7973, in Launch
    return _lldb.SBTarget_Launch(self, *args)
NotImplementedError: Wrong number or type of arguments for overloaded
function 'SBTarget_Launch'.
  Possible C/C++ prototypes are:
    lldb::SBTarget::Launch(lldb::SBListener &,char const **,char const
**,char const *,char const *,char const *,char const
*,uint32_t,bool,lldb::SBError &)
    lldb::SBTarget::Launch(lldb::SBLaunchInfo &,lldb::SBError &)

If I replace the string list ['a','b'] with None, it works.

I find that all the tests and samples uses None.

It looks the problem stems from overloaded Launch in SBTarget.i.

In LLDBWrapPython.cpp:

_wrap_SBTarget_Launch__SWIG_0 () { ...} // wrapper for
Launch(lldb::SBListener &...)
_wrap_SBTarget_Launch__SWIG_1 () { ...} // wrapper for Launch
(lldb::SBLaunchInfo &...);

SWIGINTERN PyObject *_wrap_SBTarget_Launch(PyObject *self, PyObject *args) {
...
  if (argc == 3) {
 ....
  }
  if (argc == 11) {
    int _v;
    void *vptr = 0;
    int res = SWIG_ConvertPtr(argv[0], &vptr, SWIGTYPE_p_lldb__SBTarget, 0);
    _v = SWIG_CheckState(res);
    if (_v) {
      void *vptr = 0;
      int res = SWIG_ConvertPtr(argv[1], &vptr,
SWIGTYPE_p_lldb__SBListener, 0);
      _v = SWIG_CheckState(res);
      if (_v) {
        void *vptr = 0;
        int res = SWIG_ConvertPtr(argv[2], &vptr, SWIGTYPE_p_p_char, 0); //
===================== Fails here. unable to cast to char**
        _v = SWIG_CheckState(res);
        if (_v) {
       ....
                        if (_v) {
                          return _wrap_SBTarget_Launch__SWIG_0(self, args);
  ================> real check here
               ...
  }

fail:
  SWIG_SetErrorMsg(PyExc_NotImplementedError,"Wrong number or type of
arguments for overloaded function 'SBTarget_Launch'.\n"
    "  Possible C/C++ prototypes are:\n"
    "    lldb::SBTarget::Launch(lldb::SBListener &,char const **,char const
**,char const *,char const *,char const *,char const
*,uint32_t,bool,lldb::SBError &)\n"
    "    lldb::SBTarget::Launch(lldb::SBLaunchInfo &,lldb::SBError &)\n");
  return 0;


It seems to me the swig code does some unnecessary check before it goes
into the real wrapper.
Any inputs?

Thanks,
Zephyr
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