From 9bf16440f4e50efc28212e46d265cf1351cbdcc1 Mon Sep 17 00:00:00 2001 From: Barry Warsaw Date: Tue, 23 Jan 2001 16:24:35 +0000 Subject: A few miscellaneous helpers. PyObject_Dump(): New function that is useful when debugging Python's C runtime. In something like gdb it can be a pain to get some useful information out of PyObject*'s. This function prints the str() of the object to stderr, along with the object's refcount and hex address. PyGC_Dump(): Similar to PyObject_Dump() but knows how to cast from the garbage collector prefix back to the PyObject* structure. [See Misc/gdbinit for some useful gdb hooks] none_dealloc(): Rather than SEGV if we accidentally decref None out of existance, we assign None's and NotImplemented's destructor slot to this function, which just calls abort(). --- Objects/object.c | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/Objects/object.c b/Objects/object.c index c1a1303..8a49353 100644 --- a/Objects/object.c +++ b/Objects/object.c @@ -220,6 +220,19 @@ PyObject_Print(PyObject *op, FILE *fp, int flags) return ret; } +/* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */ +void PyObject_Dump(PyObject* op) +{ + (void)PyObject_Print(op, stderr, 0); + fprintf(stderr, "\nrefcounts: %d\n", op->ob_refcnt); + fprintf(stderr, "address : %x\n", op); +} +void PyGC_Dump(PyGC_Head* op) +{ + PyObject_Dump(PyObject_FROM_GC(op)); +} + + PyObject * PyObject_Repr(PyObject *v) { @@ -1213,13 +1226,24 @@ none_repr(PyObject *op) return PyString_FromString("None"); } +/* ARGUSED */ +static void +none_dealloc(PyObject* ignore) +{ + /* This should never get called, but we also don't want to SEGV if + * we accidently decref None out of existance. + */ + abort(); +} + + static PyTypeObject PyNothing_Type = { PyObject_HEAD_INIT(&PyType_Type) 0, "None", 0, 0, - 0, /*tp_dealloc*/ /*never called*/ + (destructor)none_dealloc, /*tp_dealloc*/ /*never called*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ @@ -1250,7 +1274,7 @@ static PyTypeObject PyNotImplemented_Type = { "NotImplemented", 0, 0, - 0, /*tp_dealloc*/ /*never called*/ + (destructor)none_dealloc, /*tp_dealloc*/ /*never called*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ -- cgit v0.12