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962 lines (855 loc) · 27.4 KB
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#!/usr/bin/env python3
import io
import os
import sys
import tempfile
import textwrap
import unittest
# Get upgrade_pythoncapi.py of the parent directory
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
import upgrade_pythoncapi # noqa
def operations(disable=None):
if isinstance(disable, str):
disable = (disable,)
elif not disable:
disable = ()
operations = ["all"]
for op in upgrade_pythoncapi.EXCLUDE_FROM_ALL:
if op.NAME in disable:
continue
operations.append(op.NAME)
for name in disable:
operations.append(f'-{name}')
operations = ','.join(operations)
return operations
def patch(source, no_compat=False, disable=None):
args = ['script', 'mod.c', '-o', operations(disable=disable)]
if no_compat:
args.append('--no-compat')
patcher = upgrade_pythoncapi.Patcher(args)
return patcher.patch(source)
def reformat(source):
return textwrap.dedent(source).strip()
class Tests(unittest.TestCase):
maxDiff = 80 * 30
def _patch_file(self, source, tmp_dir=None):
# test Patcher.patcher()
filename = tempfile.mktemp(suffix='.c', dir=tmp_dir)
old_filename = filename + ".old"
try:
with open(filename, "w", encoding="utf-8", newline="") as fp:
fp.write(source)
old_stderr = sys.stderr
old_argv = list(sys.argv)
try:
# redirect stderr
sys.stderr = io.StringIO()
if tmp_dir is not None:
arg = tmp_dir
else:
arg = filename
sys.argv = ['script', arg]
try:
upgrade_pythoncapi.Patcher().main()
except SystemExit as exc:
self.assertEqual(exc.code, 0)
else:
self.fail("SystemExit not raised")
finally:
sys.stderr = old_stderr
sys.argv = old_argv
with open(filename, encoding="utf-8", newline="") as fp:
new_contents = fp.read()
with open(old_filename, encoding="utf-8", newline="") as fp:
old_contents = fp.read()
finally:
try:
os.unlink(filename)
except FileNotFoundError:
pass
try:
os.unlink(old_filename)
except FileNotFoundError:
pass
self.assertEqual(old_contents, source)
return new_contents
def test_patch_file(self):
source = """
PyTypeObject*
test_type(PyObject *obj, PyTypeObject *type)
{
Py_TYPE(obj) = type;
return Py_TYPE(obj);
}
"""
expected = """
#include "pythoncapi_compat.h"
PyTypeObject*
test_type(PyObject *obj, PyTypeObject *type)
{
Py_SET_TYPE(obj, type);
return Py_TYPE(obj);
}
"""
source = reformat(source)
expected = reformat(expected)
new_contents = self._patch_file(source)
self.assertEqual(new_contents, expected)
with tempfile.TemporaryDirectory() as tmp_dir:
new_contents = self._patch_file(source, tmp_dir)
self.assertEqual(new_contents, expected)
def test_patch_file_preserve_newlines(self):
source = """
Py_ssize_t get_size(PyVarObject *obj)\r\n\
\n\
{ return obj->ob_size; }\r\
"""
expected = """
Py_ssize_t get_size(PyVarObject *obj)\r\n\
\n\
{ return Py_SIZE(obj); }\r\
"""
source = reformat(source)
expected = reformat(expected)
new_contents = self._patch_file(source)
self.assertEqual(new_contents, expected)
def check_replace(self, source, expected, **kwargs):
source = reformat(source)
expected = reformat(expected)
self.assertEqual(patch(source, **kwargs), expected)
def check_dont_replace(self, source, disable=None):
source = reformat(source)
self.assertEqual(patch(source, disable=disable), source)
def test_expr_regex(self):
# Test EXPR_REGEX
self.check_replace("a->b->ob_type", "Py_TYPE(a->b)")
self.check_replace("a.b->ob_type", "Py_TYPE(a.b)")
self.check_replace("array[2]->ob_type", "Py_TYPE(array[2])")
# Don't match function calls
self.check_dont_replace("func()->ob_type")
def test_pythoncapi_compat(self):
# If pythoncapi_compat.h is included, avoid compatibility includes
# and macros.
#
# Otherise, Py_SET_TYPE() requires a macro and PyFrame_GetBack()
# requires 2 macros and an include.
HEADERS = (
'<pythoncapi_compat.h>',
'"pythoncapi_compat.h"',
)
for header in HEADERS:
# There is no empty line between the include and the function
# on purpose.
self.check_replace("""
#include %s
void test_set_type(PyObject *obj, PyTypeObject *type)
{
Py_TYPE(obj) = type;
}
PyFrameObject* frame_back_borrowed(PyFrameObject *frame)
{
return frame->f_back;
}
""" % header, """
#include %s
void test_set_type(PyObject *obj, PyTypeObject *type)
{
Py_SET_TYPE(obj, type);
}
PyFrameObject* frame_back_borrowed(PyFrameObject *frame)
{
return _PyFrame_GetBackBorrow(frame);
}
""" % header)
def test_py_type(self):
source = """
PyTypeObject* get_type(PyObject *obj)
{ return obj->ob_type; }
"""
expected = """
PyTypeObject* get_type(PyObject *obj)
{ return Py_TYPE(obj); }
"""
self.check_replace(source, expected)
def test_py_size(self):
source = """
Py_ssize_t get_size(PyVarObject *obj)
{ return obj->ob_size; }
"""
expected = """
Py_ssize_t get_size(PyVarObject *obj)
{ return Py_SIZE(obj); }
"""
self.check_replace(source, expected)
def test_py_refcnt(self):
source = """
Py_ssize_t get_refcnt(PyObject *obj)
{ return obj->ob_refcnt; }
"""
expected = """
Py_ssize_t get_refcnt(PyObject *obj)
{ return Py_REFCNT(obj); }
"""
self.check_replace(source, expected)
def test_py_set_type(self):
source = """
void test_type(PyObject *obj, PyTypeObject *type)
{
obj->ob_type = type;
Py_TYPE(obj) = type;
}
"""
expected = """
#include "pythoncapi_compat.h"
void test_type(PyObject *obj, PyTypeObject *type)
{
Py_SET_TYPE(obj, type);
Py_SET_TYPE(obj, type);
}
"""
self.check_replace(source, expected)
self.check_dont_replace("""
PyTypeObject* get_type(PyObject *obj, PyTypeObject *check_type)
{
assert(Py_TYPE(args) == check_type);
return Py_TYPE(obj);
}
""")
def test_py_set_size(self):
source = """\
void test_size(PyVarObject *obj)
{
obj->ob_size = 3;
Py_SIZE(obj) = 4;
}
"""
expected = """\
#include "pythoncapi_compat.h"
void test_size(PyVarObject *obj)
{
Py_SET_SIZE(obj, 3);
Py_SET_SIZE(obj, 4);
}
"""
self.check_replace(source, expected)
self.check_dont_replace("""
Py_ssize_t
get_size(PyObject *obj)
{
assert(Py_SIZE(args) == 1);
return Py_SIZE(obj);
}
""")
def test_py_set_refcnt(self):
source = """\
void set_refcnt(PyObject *obj)
{
obj->ob_refcnt = 1;
Py_REFCNT(obj) = 2;
}
"""
expected = """\
#include "pythoncapi_compat.h"
void set_refcnt(PyObject *obj)
{
Py_SET_REFCNT(obj, 1);
Py_SET_REFCNT(obj, 2);
}
"""
self.check_replace(source, expected)
self.check_dont_replace("""
Py_ssize_t
get_refcnt(PyObject *obj)
{
assert(Py_REFCNT(args) == 1);
return Py_REFCNT(obj);
}
""")
def test_pyobject_new(self):
source = """\
capsule = PyObject_NEW(PyCapsule, &PyCapsule_Type);
pattern = PyObject_NEW_VAR(PatternObject, Pattern_Type, n);
"""
expected = """\
capsule = PyObject_New(PyCapsule, &PyCapsule_Type);
pattern = PyObject_NewVar(PatternObject, Pattern_Type, n);
"""
self.check_replace(source, expected)
self.check_dont_replace("""
func = PyObject_NEW;
capsule2 = PyObject_NEW2(PyCapsule, &PyCapsule_Type);
func2 = PyObject_NEW_VAR;
pattern2 = PyObject_NEW_VAR2(PatternObject, Pattern_Type, n);
""")
def test_pymem_malloc(self):
source = """\
void *ptr = PyMem_MALLOC(10);
ptr = PyMem_REALLOC(ptr, 20);
PyMem_FREE(ptr);
PyMem_DEL(ptr);
PyMem_Del(ptr);
"""
expected = """\
void *ptr = PyMem_Malloc(10);
ptr = PyMem_Realloc(ptr, 20);
PyMem_Free(ptr);
PyMem_Free(ptr);
PyMem_Free(ptr);
"""
self.check_replace(source, expected)
def test_pyobject_malloc(self):
source = """\
void *ptr = PyObject_MALLOC(10);
ptr = PyObject_REALLOC(ptr, 20);
PyObject_FREE(ptr);
PyObject_DEL(ptr);
PyObject_Del(ptr);
"""
expected = """\
void *ptr = PyObject_Malloc(10);
ptr = PyObject_Realloc(ptr, 20);
PyObject_Free(ptr);
PyObject_Free(ptr);
PyObject_Free(ptr);
"""
self.check_replace(source, expected)
def test_pyframe_getback(self):
source = """\
PyFrameObject* frame_back_borrowed(PyFrameObject *frame)
{
return frame->f_back;
}
"""
expected = """\
#include "pythoncapi_compat.h"
PyFrameObject* frame_back_borrowed(PyFrameObject *frame)
{
return _PyFrame_GetBackBorrow(frame);
}
"""
self.check_replace(source, expected)
def test_pyframe_getcode(self):
self.check_replace("""\
PyCodeObject* frame_code_borrowed(PyFrameObject *frame)
{
return frame->f_code;
}
""", """\
#include "pythoncapi_compat.h"
PyCodeObject* frame_code_borrowed(PyFrameObject *frame)
{
return _PyFrame_GetCodeBorrow(frame);
}
""")
def test_get_member_regex(self):
# Use PyFrame_GetCode() to test get_member_regex()
self.check_dont_replace("""
void frame_set_code(PyFrameObject *frame, PyCodeObject *code)
{
frame->f_code = code;
}
void frame_clear_code(PyFrameObject *frame)
{
Py_CLEAR(frame->f_code);
}
""")
def test_pythreadstate_getinterpreter(self):
self.check_replace("""
PyInterpreterState* get_interp(PyThreadState *tstate)
{ return tstate->interp; }
""", """
#include "pythoncapi_compat.h"
PyInterpreterState* get_interp(PyThreadState *tstate)
{ return PyThreadState_GetInterpreter(tstate); }
""")
def test_pythreadstate_getframe(self):
self.check_replace("""
PyFrameObject* get_frame(PyThreadState *tstate)
{ return tstate->frame; }
""", """
#include "pythoncapi_compat.h"
PyFrameObject* get_frame(PyThreadState *tstate)
{ return _PyThreadState_GetFrameBorrow(tstate); }
""")
def test_py_newref_return(self):
self.check_replace("""
PyObject* new_ref(PyObject *obj) {
Py_INCREF(obj);
return obj;
}
PyObject* same_line(PyObject *obj) {
Py_INCREF(obj); return obj;
}
PyObject* new_xref(PyObject *obj) {
Py_XINCREF(obj);
return obj;
}
PyObject* cast(PyLongObject *obj) {
Py_XINCREF(obj);
return (PyObject *)obj;
}
""", """
#include "pythoncapi_compat.h"
PyObject* new_ref(PyObject *obj) {
return Py_NewRef(obj);
}
PyObject* same_line(PyObject *obj) {
return Py_NewRef(obj);
}
PyObject* new_xref(PyObject *obj) {
return Py_XNewRef(obj);
}
PyObject* cast(PyLongObject *obj) {
return Py_XNewRef(obj);
}
""")
def test_py_newref(self):
# INCREF, assign
self.check_replace("""
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// 1
Py_INCREF(value);
obj->attr = value;
// 2
obj->attr = value;
Py_INCREF(value);
// 3
obj->attr = value;
Py_INCREF(obj->attr);
}
""", """
#include "pythoncapi_compat.h"
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// 1
obj->attr = Py_NewRef(value);
// 2
obj->attr = Py_NewRef(value);
// 3
obj->attr = Py_NewRef(value);
}
""")
# Same line
self.check_replace("""
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// same line 1
obj->attr = value; Py_INCREF(value);
// same line 2
if (test) { obj->attr = value; Py_INCREF(obj->attr); }
// same line 3
if (test) { Py_INCREF(value); obj->attr = value; }
}
""", """
#include "pythoncapi_compat.h"
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// same line 1
obj->attr = Py_NewRef(value);
// same line 2
if (test) { obj->attr = Py_NewRef(value); }
// same line 3
if (test) { obj->attr = Py_NewRef(value); }
}
""")
# Cast
self.check_replace("""
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// cast 1
Py_INCREF(value);
obj->attr = (PyObject*)value;
// cast 2
obj->attr = (PyObject*)value;
Py_INCREF(value);
// assign var, incref
PyCodeObject *code_obj = (PyCodeObject *)code;
Py_INCREF(code_obj);
// assign var, incref
PyCodeObject* code_obj = (PyCodeObject *)code;
Py_INCREF(code);
// assign var, xincref
PyCodeObject * code_obj = (PyCodeObject *)code;
Py_XINCREF(code_obj);
// incref, assign var
Py_INCREF(code);
PyCodeObject* code_obj = (PyCodeObject *)code;
// xincref, assign var
Py_XINCREF(code);
PyCodeObject *code_obj = (PyCodeObject *)code;
}
""", """
#include "pythoncapi_compat.h"
void set_attr(MyStruct *obj, PyObject *value, int test)
{
// cast 1
obj->attr = Py_NewRef(value);
// cast 2
obj->attr = Py_NewRef(value);
// assign var, incref
PyCodeObject *code_obj = (PyCodeObject *)Py_NewRef(code);
// assign var, incref
PyCodeObject* code_obj = (PyCodeObject *)Py_NewRef(code);
// assign var, xincref
PyCodeObject * code_obj = (PyCodeObject *)Py_XNewRef(code);
// incref, assign var
PyCodeObject* code_obj = (PyCodeObject *)Py_NewRef(code);
// xincref, assign var
PyCodeObject *code_obj = (PyCodeObject *)Py_XNewRef(code);
}
""")
# Py_XINCREF
self.check_replace("""
void set_xattr(MyStruct *obj, PyObject *value)
{
// 1
Py_XINCREF(value);
obj->attr = value;
// 2
obj->attr = value;
Py_XINCREF(value);
// 3
obj->attr = value;
Py_XINCREF(obj->attr);
}
""", """
#include "pythoncapi_compat.h"
void set_xattr(MyStruct *obj, PyObject *value)
{
// 1
obj->attr = Py_XNewRef(value);
// 2
obj->attr = Py_XNewRef(value);
// 3
obj->attr = Py_XNewRef(value);
}
""")
# the first Py_INCREF should be replaced before the second one,
# otherwise the first Py_INCREF is not replaced.
self.check_replace("""
void set(void)
{
PyObject *x, *y;
Py_INCREF(Py_None);
x = Py_None;
Py_INCREF(Py_None);
x = Py_None;
Py_DECREF(x);
Py_DECREF(y);
}
""", """
#include "pythoncapi_compat.h"
void set(void)
{
PyObject *x, *y;
x = Py_NewRef(Py_None);
x = Py_NewRef(Py_None);
Py_DECREF(x);
Py_DECREF(y);
}
""")
# Indentation matters for conditional code
self.check_dont_replace("""
void test1(int test)
{
PyObject *res;
if (test)
res = Py_True;
else
res = Py_False;
Py_INCREF(res);
Py_DECREF(res);
}
int test2(struct datetime* result, PyObject *tzinfo)
{
int res = 0;
if (test)
res = 1;
else
Py_INCREF(tzinfo);
result->tzinfo = tzinfo;
return res;
}
""")
def test_py_clear(self):
self.check_replace("""
void clear(int test)
{
PyObject *obj;
// two lines
Py_XDECREF(obj);
obj = NULL;
// inside if
if (test) { Py_XDECREF(obj); obj = NULL; }
}
""", """
void clear(int test)
{
PyObject *obj;
// two lines
Py_CLEAR(obj);
// inside if
if (test) { Py_CLEAR(obj); }
}
""")
# Don't replace Py_DECREF()
self.check_dont_replace("""
void dont_clear(void)
{
PyObject *obj;
Py_DECREF(obj);
obj = NULL;
}
""", disable="Py_SETREF")
def test_py_setref(self):
self.check_replace("""
void set(PyObject **obj, PyObject *t)
{
// DECREF
Py_DECREF(*obj);
*obj = t;
// XDECREF
Py_XDECREF(*obj);
*obj = t;
// DECREF, INCREF
Py_DECREF(*obj);
Py_INCREF(t);
*obj = t;
}
""", """
#include "pythoncapi_compat.h"
void set(PyObject **obj, PyObject *t)
{
// DECREF
Py_SETREF(*obj, t);
// XDECREF
Py_XSETREF(*obj, t);
// DECREF, INCREF
Py_SETREF(*obj, Py_NewRef(t));
}
""")
self.check_replace("""
void set(PyObject **obj, PyObject *value)
{
// 1
PyObject *old = *obj;
*obj = value;
Py_DECREF(old);
// 2
PyObject *old = *obj;
*obj = Py_XNewRef(value);
Py_DECREF(old);
// 3
PyObject *old = *obj;
*obj = value;
Py_XDECREF(old);
// 4
PyObject *old = *obj;
*obj = Py_NewRef(value);
Py_XDECREF(old);
}
""", """
#include "pythoncapi_compat.h"
void set(PyObject **obj, PyObject *value)
{
// 1
Py_SETREF(*obj, value);
// 2
Py_SETREF(*obj, Py_XNewRef(value));
// 3
Py_XSETREF(*obj, value);
// 4
Py_XSETREF(*obj, Py_NewRef(value));
}
""")
# INCREF, DECREF, assign
self.check_replace("""
void set(void)
{
// 1
Py_INCREF(value);
Py_DECREF(obj);
obj = value;
// 2
Py_INCREF(value);
Py_XDECREF(obj);
obj = value;
// 3
Py_XINCREF(value);
Py_DECREF(obj);
obj = value;
// 4
Py_XINCREF(value);
Py_XDECREF(obj);
obj = value;
}
""", """
#include "pythoncapi_compat.h"
void set(void)
{
// 1
Py_SETREF(obj, Py_NewRef(value));
// 2
Py_XSETREF(obj, Py_NewRef(value));
// 3
Py_SETREF(obj, Py_XNewRef(value));
// 4
Py_XSETREF(obj, Py_XNewRef(value));
}
""")
# old variable
self.check_replace("""
void set(PyObject **obj, PyObject *value)
{
// 1
PyObject *old_next = (PyObject*)self->tb_next;
self->tb_next = (PyTracebackObject *)Py_XNewRef(new_next);
Py_XDECREF(old_next);
// 2
old_next = (PyObject*)self->tb_next;
self->tb_next = (PyTracebackObject *)Py_XNewRef(new_next);
Py_XDECREF(old_next);
}
""", """
#include "pythoncapi_compat.h"
void set(PyObject **obj, PyObject *value)
{
// 1
Py_XSETREF(self->tb_next, (PyTracebackObject *)Py_XNewRef(new_next));
// 2
Py_XSETREF(self->tb_next, (PyTracebackObject *)Py_XNewRef(new_next));
}
""")
# Py_CLEAR
self.check_replace("""
void set(PyObject **obj, PyObject *value)
{
// 1
Py_CLEAR(self->tb_next);
self->tb_next = value;
// 2
Py_INCREF(value);
Py_CLEAR(self->tb_next);
self->tb_next = value;
// 3
Py_XINCREF(value);
Py_CLEAR(self->tb_next);
self->tb_next = value;
}
""", """
#include "pythoncapi_compat.h"
void set(PyObject **obj, PyObject *value)
{
// 1
Py_XSETREF(self->tb_next, value);
// 2
Py_XSETREF(self->tb_next, Py_NewRef(value));
// 3
Py_XSETREF(self->tb_next, Py_XNewRef(value));
}
""")
def test_py_is(self):
self.check_replace("""
void test_py_is(PyObject *x)
{
if (x == Py_None) {
return 1;
}
if (x == Py_True) {
return 2;
}
if (x == Py_False) {
return 3;
}
return 0;
}
void test_py_is_not(PyObject *x)
{
if (x != Py_None) {
return 1;
}
if (x != Py_True) {
return 2;
}
if (x != Py_False) {
return 3;
}
return 0;
}
""", """
#include "pythoncapi_compat.h"
void test_py_is(PyObject *x)
{
if (Py_IsNone(x)) {
return 1;
}
if (Py_IsTrue(x)) {
return 2;
}
if (Py_IsFalse(x)) {
return 3;
}
return 0;
}
void test_py_is_not(PyObject *x)
{
if (!Py_IsNone(x)) {
return 1;
}
if (!Py_IsTrue(x)) {
return 2;
}
if (!Py_IsFalse(x)) {
return 3;
}
return 0;
}
""")
self.check_replace("""
void test_expr(struct MyStruct *obj, PyObject **obj2)
{
if (obj->attr1 == Py_None) {
return 1;
}
if (obj->attr2.name == Py_None) {
return 1;
}
if (*obj2 == Py_None) {
return 1;
}
return 0;
}
""", """
#include "pythoncapi_compat.h"
void test_expr(struct MyStruct *obj, PyObject **obj2)
{
if (Py_IsNone(obj->attr1)) {
return 1;
}
if (Py_IsNone(obj->attr2.name)) {
return 1;
}
if (Py_IsNone(*obj2)) {
return 1;
}
return 0;
}
""")
def test_no_compat(self):
# Don't add "#include "pythoncapi_compat.h"
source = """
void test_type(PyObject *obj, PyTypeObject *type)
{
obj->ob_type = type;
}
"""
expected = """
void test_type(PyObject *obj, PyTypeObject *type)
{
Py_SET_TYPE(obj, type);
}
"""
self.check_replace(source, expected, no_compat=True)
if __name__ == "__main__":
unittest.main()
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