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bpo-36381: warn when no PY_SSIZE_T_CLEAN defined (GH-12473) 

We will remove int support from 3.10 or 4.0.
This commit is contained in:
Inada Naoki 2019-03-23 21:04:40 +09:00 committed by GitHub
parent d60f658fc0
commit d3c72a223a
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 43 additions and 5 deletions
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10
Doc/whatsnew/3.8.rst
View File

@ -708,6 +708,16 @@ Changes in the Python API
set for regular user accounts.
Changes in the C API
--------------------
* Use of ``#`` variants of formats in parsing or building value (e.g.
:c:func:`PyArg_ParseTuple`, :c:func:`Py_BuildValue`, :c:func:`PyObject_CallFunction`,
etc.) without ``PY_SSIZE_T_CLEAN`` defined raises ``DeprecationWarning`` now.
It will be removed in 3.10 or 4.0. Read :ref:`arg-parsing` for detail.
(Contributed by Inada Naoki in :issue:`36381`.)
CPython bytecode changes
------------------------

2
Misc/NEWS.d/next/C API/2019-03-20-22-02-40.bpo-36381.xlzDJ2.rst Normal file
View File

@ -0,0 +1,2 @@
Raise ``DeprecationWarning`` when '#' formats are used for building or
parsing values without ``PY_SSIZE_T_CLEAN``.

15
Python/getargs.c
View File

@ -681,7 +681,13 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
/* For # codes */
#define FETCH_SIZE int *q=NULL;Py_ssize_t *q2=NULL;\
if (flags & FLAG_SIZE_T) q2=va_arg(*p_va, Py_ssize_t*); \
else q=va_arg(*p_va, int*);
else { \
if (PyErr_WarnEx(PyExc_DeprecationWarning, \
"PY_SSIZE_T_CLEAN will be required for '#' formats", 1)) { \
return NULL; \
} \
q=va_arg(*p_va, int*); \
}
#define STORE_SIZE(s) \
if (flags & FLAG_SIZE_T) \
*q2=s; \
@ -2591,8 +2597,13 @@ skipitem(const char **p_format, va_list *p_va, int flags)
if (p_va != NULL) {
if (flags & FLAG_SIZE_T)
(void) va_arg(*p_va, Py_ssize_t *);
else
else {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"PY_SSIZE_T_CLEAN will be required for '#' formats", 1)) {
return NULL;
}
(void) va_arg(*p_va, int *);
}
}
format++;
} else if ((c == 's' || c == 'z' || c == 'y' || c == 'w')

21
Python/modsupport.c
View File

@ -342,8 +342,13 @@ do_mkvalue(const char **p_format, va_list *p_va, int flags)
++*p_format;
if (flags & FLAG_SIZE_T)
n = va_arg(*p_va, Py_ssize_t);
else
else {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"PY_SSIZE_T_CLEAN will be required for '#' formats", 1)) {
return NULL;
}
n = va_arg(*p_va, int);
}
}
else
n = -1;
@ -390,8 +395,13 @@ do_mkvalue(const char **p_format, va_list *p_va, int flags)
++*p_format;
if (flags & FLAG_SIZE_T)
n = va_arg(*p_va, Py_ssize_t);
else
else {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"PY_SSIZE_T_CLEAN will be required for '#' formats", 1)) {
return NULL;
}
n = va_arg(*p_va, int);
}
}
else
n = -1;
@ -423,8 +433,13 @@ do_mkvalue(const char **p_format, va_list *p_va, int flags)
++*p_format;
if (flags & FLAG_SIZE_T)
n = va_arg(*p_va, Py_ssize_t);
else
else {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"PY_SSIZE_T_CLEAN will be required for '#' formats", 1)) {
return NULL;
}
n = va_arg(*p_va, int);
}
}
else
n = -1;