Toolchain/binutils-gdb
1
0
Fork 0
forked from Imagelibrary/binutils-gdb
Code Pull Requests Activity

Fix build breakage with Python 2.4.

Browse Source 
With Python 2.4, we see this build failure:

./python/python-internal.h: In function 'gdb_Py_DECREF':
./python/python-internal.h:179: warning: dereferencing 'void *' pointer
./python/python-internal.h:179: error: request for member 'ob_refcnt' in something not a structure or union

Python 2.4 forgets to cast 'op' to PyObject pointer on the ob_refcnt
accesses:

  #define Py_DECREF(op)                                   \
          if (_Py_DEC_REFTOTAL  _Py_REF_DEBUG_COMMA       \
              --(op)->ob_refcnt != 0)                     \
                  _Py_CHECK_REFCNT(op)                    \
          else                                            \
                  _Py_Dealloc((PyObject *)(op))

...

  #define _Py_CHECK_REFCNT(OP)                                    \
  {       if ((OP)->ob_refcnt < 0)                                \
                  _Py_NegativeRefcount(__FILE__, __LINE__,        \
                                       (PyObject *)(OP));         \
  }

Python 2.7:

  #define Py_DECREF(op)                                   \
      do {                                                \
          if (_Py_DEC_REFTOTAL  _Py_REF_DEBUG_COMMA       \
          --((PyObject*)(op))->ob_refcnt != 0)            \
              _Py_CHECK_REFCNT(op)                        \
          else                                            \
          _Py_Dealloc((PyObject *)(op));                  \
      } while (0)

...

  #define _Py_CHECK_REFCNT(OP)                                    \
  {       if (((PyObject*)OP)->ob_refcnt < 0)                             \
                  _Py_NegativeRefcount(__FILE__, __LINE__,        \
                                       (PyObject *)(OP));         \
  }

gdb/
2013-05-30  Pedro Alves  <palves@redhat.com>

	* python/python-internal.h (gdb_Py_DECREF): Cast OP to PyObject
	pointer.
This commit is contained in:
Pedro Alves
2013-05-30 08:56:56 +00:00
parent 36d25514de
commit a6e6f79133
2 changed files with 9 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/python/python-internal.h
View File

@@ -176,7 +176,10 @@ typedef unsigned long gdb_py_ulongest;
static inline void
gdb_Py_DECREF (void *op) /* ARI: editCase function */
{
Py_DECREF (op);
/* ... and Python 2.4 didn't cast OP to PyObject pointer on the
'(op)->ob_refcnt' references within the macro. Cast it ourselves
too. */
Py_DECREF ((PyObject *) op);
}
#undef Py_DECREF