Function srd_exception_catch

libsigrokdecode4DSL/exception.c:90–180

@private */

/** @private */
SRD_PRIV void srd_exception_catch(char **error, const char *format, ...)
{
	int i, ret;
	va_list args;
	PyObject *py_etype, *py_evalue, *py_etraceback;
	PyObject *py_mod, *py_func, *py_tracefmt;
	char *msg, *etype_name, *evalue_str, *outstr;
	const char *etype_name_fallback;
	PyGILState_STATE gstate;
	GString *s;
	char *final_msg;

	py_etype = py_evalue = py_etraceback = py_mod = py_func = NULL;

	va_start(args, format);
	msg = g_strdup_vprintf(format, args);
	va_end(args);

	gstate = PyGILState_Ensure();

	PyErr_Fetch(&py_etype, &py_evalue, &py_etraceback);
	if (!py_etype) {
		/* No current exception, so just print the message. */
		final_msg = g_strjoin(":", msg, "unknown error", NULL);
		srd_err("%s.", final_msg);
		goto cleanup;
	}
	PyErr_NormalizeException(&py_etype, &py_evalue, &py_etraceback);

	etype_name = py_get_string_attr(py_etype, "__name__");
	evalue_str = py_stringify(py_evalue);
	etype_name_fallback = (etype_name) ? etype_name : "(unknown exception)";

	if (evalue_str)
		final_msg = g_strjoin(":", msg, etype_name_fallback, evalue_str, NULL);
	else
		final_msg = g_strjoin(":", msg, etype_name_fallback, NULL);

	g_free(evalue_str);
	g_free(etype_name);

	srd_err("%s.", final_msg);

	/* If there is no traceback object, we are done. */
	if (!py_etraceback)
		goto cleanup;

	py_mod = py_import_by_name("traceback");
	if (!py_mod)
		goto cleanup;

	py_func = PyObject_GetAttrString(py_mod, "format_exception");
	if (!py_func || !PyCallable_Check(py_func))
		goto cleanup;

	/* Call into Python to format the stack trace. */
	py_tracefmt = PyObject_CallFunctionObjArgs(py_func,
			py_etype, py_evalue, py_etraceback, NULL);