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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup pythonintern
*
* This file contains utility functions for getting data from a python stack
* trace.
*/
#include <Python.h>
#include <frameobject.h>
#include "BLI_path_util.h"
#include "BLI_utildefines.h"
#ifdef WIN32
# include "BLI_string.h" /* BLI_strcasecmp */
#endif
#include "bpy_traceback.h"
static const char *traceback_filepath(PyTracebackObject *tb, PyObject **coerce)
{
*coerce = PyUnicode_EncodeFSDefault(tb->tb_frame->f_code->co_filename);
return PyBytes_AS_STRING(*coerce);
}
/* copied from pythonrun.c, 3.10.0 */
_Py_static_string(PyId_string, "<string>");
static int parse_syntax_error(PyObject *err,
PyObject **message,
PyObject **filename,
int *lineno,
int *offset,
int *end_lineno,
int *end_offset,
PyObject **text)
{
Py_ssize_t hold;
PyObject *v;
_Py_IDENTIFIER(msg);
_Py_IDENTIFIER(filename);
_Py_IDENTIFIER(lineno);
_Py_IDENTIFIER(offset);
_Py_IDENTIFIER(end_lineno);
_Py_IDENTIFIER(end_offset);
_Py_IDENTIFIER(text);
*message = NULL;
*filename = NULL;
/* new style errors. `err' is an instance */
*message = _PyObject_GetAttrId(err, &PyId_msg);
if (!*message) {
goto finally;
}
v = _PyObject_GetAttrId(err, &PyId_filename);
if (!v) {
goto finally;
}
if (v == Py_None) {
Py_DECREF(v);
*filename = _PyUnicode_FromId(&PyId_string);
if (*filename == NULL) {
goto finally;
}
Py_INCREF(*filename);
}
else {
*filename = v;
}
v = _PyObject_GetAttrId(err, &PyId_lineno);
if (!v) {
goto finally;
}
hold = PyLong_AsSsize_t(v);
Py_DECREF(v);
if (hold < 0 && PyErr_Occurred()) {
goto finally;
}
*lineno = (int)hold;
v = _PyObject_GetAttrId(err, &PyId_offset);
if (!v) {
goto finally;
}
if (v == Py_None) {
*offset = -1;
Py_DECREF(v);
}
else {
hold = PyLong_AsSsize_t(v);
Py_DECREF(v);
if (hold < 0 && PyErr_Occurred()) {
goto finally;
}
*offset = (int)hold;
}
if (Py_TYPE(err) == (PyTypeObject *)PyExc_SyntaxError) {
v = _PyObject_GetAttrId(err, &PyId_end_lineno);
if (!v) {
PyErr_Clear();
*end_lineno = *lineno;
}
else if (v == Py_None) {
*end_lineno = *lineno;
Py_DECREF(v);
}
else {
hold = PyLong_AsSsize_t(v);
Py_DECREF(v);
if (hold < 0 && PyErr_Occurred()) {
goto finally;
}
*end_lineno = hold;
}
v = _PyObject_GetAttrId(err, &PyId_end_offset);
if (!v) {
PyErr_Clear();
*end_offset = -1;
}
else if (v == Py_None) {
*end_offset = -1;
Py_DECREF(v);
}
else {
hold = PyLong_AsSsize_t(v);
Py_DECREF(v);
if (hold < 0 && PyErr_Occurred()) {
goto finally;
}
*end_offset = hold;
}
}
else {
/* `SyntaxError` subclasses. */
*end_lineno = *lineno;
*end_offset = -1;
}
v = _PyObject_GetAttrId(err, &PyId_text);
if (!v) {
goto finally;
}
if (v == Py_None) {
Py_DECREF(v);
*text = NULL;
}
else {
*text = v;
}
return 1;
finally:
Py_XDECREF(*message);
Py_XDECREF(*filename);
return 0;
}
/* end copied function! */
bool python_script_error_jump(
const char *filepath, int *r_lineno, int *r_offset, int *r_lineno_end, int *r_offset_end)
{
/* WARNING(@campbellbarton): The normalized exception is restored (losing line number info).
* Ideally this would leave the exception state as it found it, but that needs to be done
* carefully with regards to reference counting, see: T97731. */
bool success = false;
PyObject *exception, *value;
PyTracebackObject *tb;
*r_lineno = -1;
*r_offset = 0;
*r_lineno_end = -1;
*r_offset_end = 0;
PyErr_Fetch(&exception, &value, (PyObject **)&tb);
if (exception == NULL) {
return false;
}
if (PyErr_GivenExceptionMatches(exception, PyExc_SyntaxError)) {
/* No trace-back available when `SyntaxError`.
* Python has no API's to this. reference #parse_syntax_error() from `pythonrun.c`. */
PyErr_NormalizeException(&exception, &value, (PyObject **)&tb);
if (value) { /* Should always be true. */
PyObject *message;
PyObject *filepath_exc_py, *text_py;
if (parse_syntax_error(value,
&message,
&filepath_exc_py,
r_lineno,
r_offset,
r_lineno_end,
r_offset_end,
&text_py)) {
const char *filepath_exc = PyUnicode_AsUTF8(filepath_exc_py);
/* python adds a '/', prefix, so check for both */
if ((BLI_path_cmp(filepath_exc, filepath) == 0) ||
(ELEM(filepath_exc[0], '\\', '/') && BLI_path_cmp(filepath_exc + 1, filepath) == 0)) {
success = true;
}
}
}
}
else {
PyErr_NormalizeException(&exception, &value, (PyObject **)&tb);
for (tb = (PyTracebackObject *)PySys_GetObject("last_traceback");
tb && (PyObject *)tb != Py_None;
tb = tb->tb_next) {
PyObject *coerce;
const char *tb_filepath = traceback_filepath(tb, &coerce);
const int match = ((BLI_path_cmp(tb_filepath, filepath) == 0) ||
(ELEM(tb_filepath[0], '\\', '/') &&
BLI_path_cmp(tb_filepath + 1, filepath) == 0));
Py_DECREF(coerce);
if (match) {
success = true;
*r_lineno = *r_lineno_end = tb->tb_lineno;
/* used to break here, but better find the inner most line */
}
}
}
PyErr_Restore(exception, value, (PyObject *)tb); /* takes away reference! */
return success;
}
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