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BPY: Add a debug utils to print Python backtrace from C++ code.

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This commit is contained in:
Bastien Montagne
2024-10-11 14:17:50 +02:00
parent d8ccaa62fb
commit aecdb518db
2 changed files with 35 additions and 0 deletions
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8
source/blender/python/BPY_extern.hh
View File

@@ -56,6 +56,14 @@ void BPY_thread_restore(BPy_ThreadStatePtr tstate);
} \
(void)0
/**
* Print the Python backtrace of the current thread state.
*
* Should be safe to call from anywhere at any point, may not output anything if there is no valid
* python thread state available.
*/
void BPY_thread_backtrace_print();
void BPY_text_free_code(Text *text);
/**
* Needed so the #Main pointer in `bpy.data` doesn't become out of date.

27
source/blender/python/generic/bpy_threads.cc
View File

@@ -32,3 +32,30 @@ void BPY_thread_restore(BPy_ThreadStatePtr tstate)
PyEval_RestoreThread((PyThreadState *)tstate);
}
}
void BPY_thread_backtrace_print()
{
PyThreadState *tstate = PyGILState_GetThisThreadState();
if (tstate) {
PyFrameObject *frame = PyThreadState_GetFrame(tstate);
printf(frame ? "Python stack trace:\n" : "No Python stack trace available.\n");
while (frame) {
PyCodeObject *frame_co = PyFrame_GetCode(frame);
int line = PyFrame_GetLineNumber(frame);
const char *filename = PyUnicode_AsUTF8(frame_co->co_filename);
const char *funcname = PyUnicode_AsUTF8(frame_co->co_name);
printf(" %s:%d %s\n", filename, line, funcname);
Py_DECREF(frame_co);
PyFrameObject *frame_back = PyFrame_GetBack(frame);
Py_DECREF(frame);
frame = frame_back;
}
printf("\n");
}
else {
printf("No Python thread state available.\n");
}
}