1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
#include "parts.h"
static Py_ssize_t
get_code_extra_index(PyInterpreterState* interp) {
Py_ssize_t result = -1;
static const char *key = "_testcapi.frame_evaluation.code_index";
PyObject *interp_dict = PyInterpreterState_GetDict(interp); // borrowed
assert(interp_dict); // real users would handle missing dict... somehow
PyObject *index_obj = PyDict_GetItemString(interp_dict, key); // borrowed
Py_ssize_t index = 0;
if (!index_obj) {
if (PyErr_Occurred()) {
goto finally;
}
index = PyUnstable_Eval_RequestCodeExtraIndex(NULL);
if (index < 0 || PyErr_Occurred()) {
goto finally;
}
index_obj = PyLong_FromSsize_t(index); // strong ref
if (!index_obj) {
goto finally;
}
int res = PyDict_SetItemString(interp_dict, key, index_obj);
Py_DECREF(index_obj);
if (res < 0) {
goto finally;
}
}
else {
index = PyLong_AsSsize_t(index_obj);
if (index == -1 && PyErr_Occurred()) {
goto finally;
}
}
result = index;
finally:
return result;
}
static PyObject *
test_code_extra(PyObject* self, PyObject *Py_UNUSED(callable))
{
PyObject *result = NULL;
PyObject *test_module = NULL;
PyObject *test_func = NULL;
// Get or initialize interpreter-specific code object storage index
PyInterpreterState *interp = PyInterpreterState_Get();
if (!interp) {
return NULL;
}
Py_ssize_t code_extra_index = get_code_extra_index(interp);
if (PyErr_Occurred()) {
goto finally;
}
// Get a function to test with
// This can be any Python function. Use `test.test_misc.testfunction`.
test_module = PyImport_ImportModule("test.test_capi.test_misc");
if (!test_module) {
goto finally;
}
test_func = PyObject_GetAttrString(test_module, "testfunction");
if (!test_func) {
goto finally;
}
PyObject *test_func_code = PyFunction_GetCode(test_func); // borrowed
if (!test_func_code) {
goto finally;
}
// Check the value is initially NULL
void *extra;
int res = PyUnstable_Code_GetExtra(test_func_code, code_extra_index, &extra);
if (res < 0) {
goto finally;
}
assert (extra == NULL);
// Set another code extra value
res = PyUnstable_Code_SetExtra(test_func_code, code_extra_index, (void*)(uintptr_t)77);
if (res < 0) {
goto finally;
}
// Assert it was set correctly
res = PyUnstable_Code_GetExtra(test_func_code, code_extra_index, &extra);
if (res < 0) {
goto finally;
}
assert ((uintptr_t)extra == 77);
// Revert to initial code extra value.
res = PyUnstable_Code_SetExtra(test_func_code, code_extra_index, NULL);
if (res < 0) {
goto finally;
}
result = Py_NewRef(Py_None);
finally:
Py_XDECREF(test_module);
Py_XDECREF(test_func);
return result;
}
static PyMethodDef TestMethods[] = {
{"test_code_extra", test_code_extra, METH_NOARGS},
{NULL},
};
int
_PyTestCapi_Init_Code(PyObject *m) {
if (PyModule_AddFunctions(m, TestMethods) < 0) {
return -1;
}
return 0;
}
|
