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#include "parts.h"
#include "util.h"
static PyObject *
call_pyobject_print(PyObject *self, PyObject * args)
{
PyObject *object;
PyObject *filename;
PyObject *print_raw;
FILE *fp;
int flags = 0;
if (!PyArg_UnpackTuple(args, "call_pyobject_print", 3, 3,
&object, &filename, &print_raw)) {
return NULL;
}
fp = Py_fopen(filename, "w+");
if (fp == NULL) {
return NULL;
}
if (Py_IsTrue(print_raw)) {
flags = Py_PRINT_RAW;
}
if (PyObject_Print(object, fp, flags) < 0) {
fclose(fp);
return NULL;
}
fclose(fp);
Py_RETURN_NONE;
}
static PyObject *
pyobject_print_null(PyObject *self, PyObject *filename)
{
FILE *fp;
fp = Py_fopen(filename, "w+");
if (fp == NULL) {
return NULL;
}
if (PyObject_Print(NULL, fp, 0) < 0) {
fclose(fp);
return NULL;
}
fclose(fp);
Py_RETURN_NONE;
}
static PyObject *
pyobject_print_noref_object(PyObject *self, PyObject *filename)
{
PyObject *test_string;
FILE *fp;
char correct_string[100];
test_string = PyUnicode_FromString("Spam spam spam");
if (test_string == NULL) {
return NULL;
}
Py_SET_REFCNT(test_string, 0);
PyOS_snprintf(correct_string, 100, "<refcnt %zd at %p>",
Py_REFCNT(test_string), (void *)test_string);
fp = Py_fopen(filename, "w+");
if (fp == NULL) {
Py_SET_REFCNT(test_string, 1);
Py_DECREF(test_string);
return NULL;
}
if (PyObject_Print(test_string, fp, 0) < 0){
fclose(fp);
Py_SET_REFCNT(test_string, 1);
Py_DECREF(test_string);
return NULL;
}
fclose(fp);
Py_SET_REFCNT(test_string, 1);
Py_DECREF(test_string);
return PyUnicode_FromString(correct_string);
}
static PyObject *
pyobject_print_os_error(PyObject *self, PyObject *filename)
{
PyObject *test_string;
FILE *fp;
test_string = PyUnicode_FromString("Spam spam spam");
if (test_string == NULL) {
return NULL;
}
// open file in read mode to induce OSError
fp = Py_fopen(filename, "r");
if (fp == NULL) {
Py_DECREF(test_string);
return NULL;
}
if (PyObject_Print(test_string, fp, 0) < 0) {
fclose(fp);
Py_DECREF(test_string);
return NULL;
}
fclose(fp);
Py_DECREF(test_string);
Py_RETURN_NONE;
}
static PyObject *
pyobject_clear_weakrefs_no_callbacks(PyObject *self, PyObject *obj)
{
PyUnstable_Object_ClearWeakRefsNoCallbacks(obj);
Py_RETURN_NONE;
}
static PyObject *
pyobject_enable_deferred_refcount(PyObject *self, PyObject *obj)
{
int result = PyUnstable_Object_EnableDeferredRefcount(obj);
return PyLong_FromLong(result);
}
static PyObject *
pyobject_is_unique_temporary(PyObject *self, PyObject *obj)
{
int result = PyUnstable_Object_IsUniqueReferencedTemporary(obj);
return PyLong_FromLong(result);
}
static PyObject *
pyobject_is_unique_temporary_new_object(PyObject *self, PyObject *unused)
{
PyObject *obj = PyList_New(0);
int result = PyUnstable_Object_IsUniqueReferencedTemporary(obj);
Py_DECREF(obj);
return PyLong_FromLong(result);
}
static int MyObject_dealloc_called = 0;
static void
MyObject_dealloc(PyObject *op)
{
// PyUnstable_TryIncRef should return 0 if object is being deallocated
assert(Py_REFCNT(op) == 0);
assert(!PyUnstable_TryIncRef(op));
assert(Py_REFCNT(op) == 0);
MyObject_dealloc_called++;
Py_TYPE(op)->tp_free(op);
}
static PyTypeObject MyType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "MyType",
.tp_basicsize = sizeof(PyObject),
.tp_dealloc = MyObject_dealloc,
};
static PyObject *
test_py_try_inc_ref(PyObject *self, PyObject *unused)
{
if (PyType_Ready(&MyType) < 0) {
return NULL;
}
MyObject_dealloc_called = 0;
PyObject *op = PyObject_New(PyObject, &MyType);
if (op == NULL) {
return NULL;
}
PyUnstable_EnableTryIncRef(op);
#ifdef Py_GIL_DISABLED
// PyUnstable_EnableTryIncRef sets the shared flags to
// `_Py_REF_MAYBE_WEAKREF` if the flags are currently zero to ensure that
// the shared reference count is merged on deallocation.
assert((op->ob_ref_shared & _Py_REF_SHARED_FLAG_MASK) >= _Py_REF_MAYBE_WEAKREF);
#endif
if (!PyUnstable_TryIncRef(op)) {
PyErr_SetString(PyExc_AssertionError, "PyUnstable_TryIncRef failed");
Py_DECREF(op);
return NULL;
}
Py_DECREF(op); // undo try-incref
Py_DECREF(op); // dealloc
assert(MyObject_dealloc_called == 1);
Py_RETURN_NONE;
}
static PyObject *
_test_incref(PyObject *ob)
{
return Py_NewRef(ob);
}
static PyObject *
test_xincref_doesnt_leak(PyObject *ob, PyObject *Py_UNUSED(ignored))
{
PyObject *obj = PyLong_FromLong(0);
Py_XINCREF(_test_incref(obj));
Py_DECREF(obj);
Py_DECREF(obj);
Py_DECREF(obj);
Py_RETURN_NONE;
}
static PyObject *
test_incref_doesnt_leak(PyObject *ob, PyObject *Py_UNUSED(ignored))
{
PyObject *obj = PyLong_FromLong(0);
Py_INCREF(_test_incref(obj));
Py_DECREF(obj);
Py_DECREF(obj);
Py_DECREF(obj);
Py_RETURN_NONE;
}
static PyObject *
test_xdecref_doesnt_leak(PyObject *ob, PyObject *Py_UNUSED(ignored))
{
Py_XDECREF(PyLong_FromLong(0));
Py_RETURN_NONE;
}
static PyObject *
test_decref_doesnt_leak(PyObject *ob, PyObject *Py_UNUSED(ignored))
{
Py_DECREF(PyLong_FromLong(0));
Py_RETURN_NONE;
}
static PyObject *
test_incref_decref_API(PyObject *ob, PyObject *Py_UNUSED(ignored))
{
PyObject *obj = PyLong_FromLong(0);
Py_IncRef(obj);
Py_DecRef(obj);
Py_DecRef(obj);
Py_RETURN_NONE;
}
#ifdef Py_REF_DEBUG
static PyObject *
negative_refcount(PyObject *self, PyObject *Py_UNUSED(args))
{
PyObject *obj = PyUnicode_FromString("negative_refcount");
if (obj == NULL) {
return NULL;
}
assert(Py_REFCNT(obj) == 1);
Py_SET_REFCNT(obj, 0);
/* Py_DECREF() must call _Py_NegativeRefcount() and abort Python */
Py_DECREF(obj);
Py_RETURN_NONE;
}
static PyObject *
decref_freed_object(PyObject *self, PyObject *Py_UNUSED(args))
{
PyObject *obj = PyUnicode_FromString("decref_freed_object");
if (obj == NULL) {
return NULL;
}
assert(Py_REFCNT(obj) == 1);
// Deallocate the memory
Py_DECREF(obj);
// obj is a now a dangling pointer
// gh-109496: If Python is built in debug mode, Py_DECREF() must call
// _Py_NegativeRefcount() and abort Python.
Py_DECREF(obj);
Py_RETURN_NONE;
}
#endif
// Test Py_CLEAR() macro
static PyObject*
test_py_clear(PyObject *self, PyObject *Py_UNUSED(ignored))
{
// simple case with a variable
PyObject *obj = PyList_New(0);
if (obj == NULL) {
return NULL;
}
Py_CLEAR(obj);
assert(obj == NULL);
// gh-98724: complex case, Py_CLEAR() argument has a side effect
PyObject* array[1];
array[0] = PyList_New(0);
if (array[0] == NULL) {
return NULL;
}
PyObject **p = array;
Py_CLEAR(*p++);
assert(array[0] == NULL);
assert(p == array + 1);
Py_RETURN_NONE;
}
// Test Py_SETREF() and Py_XSETREF() macros, similar to test_py_clear()
static PyObject*
test_py_setref(PyObject *self, PyObject *Py_UNUSED(ignored))
{
// Py_SETREF() simple case with a variable
PyObject *obj = PyList_New(0);
if (obj == NULL) {
return NULL;
}
Py_SETREF(obj, NULL);
assert(obj == NULL);
// Py_XSETREF() simple case with a variable
PyObject *obj2 = PyList_New(0);
if (obj2 == NULL) {
return NULL;
}
Py_XSETREF(obj2, NULL);
assert(obj2 == NULL);
// test Py_XSETREF() when the argument is NULL
Py_XSETREF(obj2, NULL);
assert(obj2 == NULL);
// gh-98724: complex case, Py_SETREF() argument has a side effect
PyObject* array[1];
array[0] = PyList_New(0);
if (array[0] == NULL) {
return NULL;
}
PyObject **p = array;
Py_SETREF(*p++, NULL);
assert(array[0] == NULL);
assert(p == array + 1);
// gh-98724: complex case, Py_XSETREF() argument has a side effect
PyObject* array2[1];
array2[0] = PyList_New(0);
if (array2[0] == NULL) {
return NULL;
}
PyObject **p2 = array2;
Py_XSETREF(*p2++, NULL);
assert(array2[0] == NULL);
assert(p2 == array2 + 1);
// test Py_XSETREF() when the argument is NULL
p2 = array2;
Py_XSETREF(*p2++, NULL);
assert(array2[0] == NULL);
assert(p2 == array2 + 1);
Py_RETURN_NONE;
}
#define TEST_REFCOUNT() \
do { \
PyObject *obj = PyList_New(0); \
if (obj == NULL) { \
return NULL; \
} \
assert(Py_REFCNT(obj) == 1); \
\
/* test Py_NewRef() */ \
PyObject *ref = Py_NewRef(obj); \
assert(ref == obj); \
assert(Py_REFCNT(obj) == 2); \
Py_DECREF(ref); \
\
/* test Py_XNewRef() */ \
PyObject *xref = Py_XNewRef(obj); \
assert(xref == obj); \
assert(Py_REFCNT(obj) == 2); \
Py_DECREF(xref); \
\
assert(Py_XNewRef(NULL) == NULL); \
\
Py_DECREF(obj); \
Py_RETURN_NONE; \
} while (0)
// Test Py_NewRef() and Py_XNewRef() macros
static PyObject*
test_refcount_macros(PyObject *self, PyObject *Py_UNUSED(ignored))
{
TEST_REFCOUNT();
}
#undef Py_NewRef
#undef Py_XNewRef
// Test Py_NewRef() and Py_XNewRef() functions, after undefining macros.
static PyObject*
test_refcount_funcs(PyObject *self, PyObject *Py_UNUSED(ignored))
{
TEST_REFCOUNT();
}
// Test Py_Is() function
#define TEST_PY_IS() \
do { \
PyObject *o_none = Py_None; \
PyObject *o_true = Py_True; \
PyObject *o_false = Py_False; \
PyObject *obj = PyList_New(0); \
if (obj == NULL) { \
return NULL; \
} \
\
/* test Py_Is() */ \
assert(Py_Is(obj, obj)); \
assert(!Py_Is(obj, o_none)); \
\
/* test Py_None */ \
assert(Py_Is(o_none, o_none)); \
assert(!Py_Is(obj, o_none)); \
\
/* test Py_True */ \
assert(Py_Is(o_true, o_true)); \
assert(!Py_Is(o_false, o_true)); \
assert(!Py_Is(obj, o_true)); \
\
/* test Py_False */ \
assert(Py_Is(o_false, o_false)); \
assert(!Py_Is(o_true, o_false)); \
assert(!Py_Is(obj, o_false)); \
\
Py_DECREF(obj); \
Py_RETURN_NONE; \
} while (0)
// Test Py_Is() macro
static PyObject*
test_py_is_macros(PyObject *self, PyObject *Py_UNUSED(ignored))
{
TEST_PY_IS();
}
#undef Py_Is
// Test Py_Is() function, after undefining its macro.
static PyObject*
test_py_is_funcs(PyObject *self, PyObject *Py_UNUSED(ignored))
{
TEST_PY_IS();
}
static PyObject *
clear_managed_dict(PyObject *self, PyObject *obj)
{
PyObject_ClearManagedDict(obj);
Py_RETURN_NONE;
}
static PyObject *
is_uniquely_referenced(PyObject *self, PyObject *op)
{
return PyBool_FromLong(PyUnstable_Object_IsUniquelyReferenced(op));
}
static PyMethodDef test_methods[] = {
{"call_pyobject_print", call_pyobject_print, METH_VARARGS},
{"pyobject_print_null", pyobject_print_null, METH_O},
{"pyobject_print_noref_object", pyobject_print_noref_object, METH_O},
{"pyobject_print_os_error", pyobject_print_os_error, METH_O},
{"pyobject_clear_weakrefs_no_callbacks", pyobject_clear_weakrefs_no_callbacks, METH_O},
{"pyobject_enable_deferred_refcount", pyobject_enable_deferred_refcount, METH_O},
{"pyobject_is_unique_temporary", pyobject_is_unique_temporary, METH_O},
{"pyobject_is_unique_temporary_new_object", pyobject_is_unique_temporary_new_object, METH_NOARGS},
{"test_py_try_inc_ref", test_py_try_inc_ref, METH_NOARGS},
{"test_xincref_doesnt_leak",test_xincref_doesnt_leak, METH_NOARGS},
{"test_incref_doesnt_leak", test_incref_doesnt_leak, METH_NOARGS},
{"test_xdecref_doesnt_leak",test_xdecref_doesnt_leak, METH_NOARGS},
{"test_decref_doesnt_leak", test_decref_doesnt_leak, METH_NOARGS},
{"test_incref_decref_API", test_incref_decref_API, METH_NOARGS},
#ifdef Py_REF_DEBUG
{"negative_refcount", negative_refcount, METH_NOARGS},
{"decref_freed_object", decref_freed_object, METH_NOARGS},
#endif
{"test_py_clear", test_py_clear, METH_NOARGS},
{"test_py_setref", test_py_setref, METH_NOARGS},
{"test_refcount_macros", test_refcount_macros, METH_NOARGS},
{"test_refcount_funcs", test_refcount_funcs, METH_NOARGS},
{"test_py_is_macros", test_py_is_macros, METH_NOARGS},
{"test_py_is_funcs", test_py_is_funcs, METH_NOARGS},
{"clear_managed_dict", clear_managed_dict, METH_O, NULL},
{"is_uniquely_referenced", is_uniquely_referenced, METH_O},
{NULL},
};
int
_PyTestCapi_Init_Object(PyObject *m)
{
return PyModule_AddFunctions(m, test_methods);
}
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