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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision f8e943f193a3b34f056d7b3a79b794d3b747685f authored by Tim Peters on 08 October 2002, 21:03:26 UTC, committed by Tim Peters on 08 October 2002, 21:03:26 UTC 
The
 
        list(xrange(sys.maxint / 4))
test.  Changed 4 to 2.

The belief is that this test intended to trigger a bit of code in
listobject.c's NRESIZE macro that's looking for arithmetic overflow.  As
written, it doesn't achieve that, though, and leaves it up to the platform
realloc() as to whether it wants to allocate 2 gigabytes.  Some platforms
say "sure!", although they don't appear to mean it, and disaster ensues.

Changing 4 to 2 (just barely) manages to trigger the arithmetic overflow
test instead, leaving the platform realloc() out of it.
1 parent aff84f7
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Tip revision: f8e943f193a3b34f056d7b3a79b794d3b747685f authored by Tim Peters on 08 October 2002, 21:03:26 UTC
The
Tip revision: f8e943f
methodobject.h 

/* Method object interface */

#ifndef Py_METHODOBJECT_H
#define Py_METHODOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif

extern DL_IMPORT(PyTypeObject) PyCFunction_Type;

#define PyCFunction_Check(op) ((op)->ob_type == &PyCFunction_Type)

typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
					     PyObject *);
typedef PyObject *(*PyNoArgsFunction)(PyObject *);

extern DL_IMPORT(PyCFunction) PyCFunction_GetFunction(PyObject *);
extern DL_IMPORT(PyObject *) PyCFunction_GetSelf(PyObject *);
extern DL_IMPORT(int) PyCFunction_GetFlags(PyObject *);

/* Macros for direct access to these values. Type checks are *not*
   done, so use with care. */
#define PyCFunction_GET_FUNCTION(func) \
        (((PyCFunctionObject *)func) -> m_ml -> ml_meth)
#define PyCFunction_GET_SELF(func) \
	(((PyCFunctionObject *)func) -> m_self)
#define PyCFunction_GET_FLAGS(func) \
	(((PyCFunctionObject *)func) -> m_ml -> ml_flags)
extern DL_IMPORT(PyObject *) PyCFunction_Call(PyObject *, PyObject *, PyObject *);

struct PyMethodDef {
    char	*ml_name;
    PyCFunction  ml_meth;
    int		 ml_flags;
    char	*ml_doc;
};
typedef struct PyMethodDef PyMethodDef;

extern DL_IMPORT(PyObject *) Py_FindMethod(PyMethodDef[], PyObject *, char *);

extern DL_IMPORT(PyObject *) PyCFunction_New(PyMethodDef *, PyObject *);

/* Flag passed to newmethodobject */
#define METH_OLDARGS  0x0000
#define METH_VARARGS  0x0001
#define METH_KEYWORDS 0x0002
/* METH_NOARGS and METH_O must not be combined with any other flag. */
#define METH_NOARGS   0x0004
#define METH_O        0x0008

typedef struct PyMethodChain {
    PyMethodDef *methods;		/* Methods of this type */
    struct PyMethodChain *link;	/* NULL or base type */
} PyMethodChain;

extern DL_IMPORT(PyObject *) Py_FindMethodInChain(PyMethodChain *, PyObject *,
                                                  char *);

typedef struct {
    PyObject_HEAD
    PyMethodDef *m_ml;
    PyObject    *m_self;
} PyCFunctionObject;

#ifdef __cplusplus
}
#endif
#endif /* !Py_METHODOBJECT_H */
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