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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, 3.4.0 */
_Py_static_string(PyId_string, "<string>");
static int parse_syntax_error(PyObject *err,
PyObject **message,
PyObject **filename,
int *lineno,
int *offset,
PyObject **text)
{
long hold;
PyObject *v;
_Py_IDENTIFIER(msg);
_Py_IDENTIFIER(filename);
_Py_IDENTIFIER(lineno);
_Py_IDENTIFIER(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_AsLong(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_AsLong(v);
Py_DECREF(v);
if (hold < 0 && PyErr_Occurred()) {
goto finally;
}
*offset = (int)hold;
}
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! */
void python_script_error_jump(const char *filepath, int *lineno, int *offset)
{
PyObject *exception, *value;
PyTracebackObject *tb;
*lineno = -1;
*offset = 0;
PyErr_Fetch(&exception, &value, (PyObject **)&tb);
if (exception == NULL) {
return;
}
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 *filename_py, *text_py;
if (parse_syntax_error(value, &message, &filename_py, lineno, offset, &text_py)) {
const char *filename = PyUnicode_AsUTF8(filename_py);
/* python adds a '/', prefix, so check for both */
if ((BLI_path_cmp(filename, filepath) == 0) ||
(ELEM(filename[0], '\\', '/') && BLI_path_cmp(filename + 1, filepath) == 0)) {
/* good */
}
else {
*lineno = -1;
}
}
else {
*lineno = -1;
}
}
PyErr_Restore(exception, value, (PyObject *)tb); /* takes away reference! */
}
else {
PyErr_NormalizeException(&exception, &value, (PyObject **)&tb);
PyErr_Restore(exception, value, (PyObject *)tb); /* takes away reference! */
PyErr_Print();
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) {
*lineno = tb->tb_lineno;
/* used to break here, but better find the inner most line */
}
}
}
}
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