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#ifndef NO_PYTHON
#include <Python.h>
#include <pybind11/pybind11.h>
#include "nextpnr.h"
namespace py = pybind11;
NEXTPNR_NAMESPACE_BEGIN
// Parses the value of the active python exception
// NOTE SHOULD NOT BE CALLED IF NO EXCEPTION
std::string parse_python_exception()
{
PyObject *type_ptr = NULL, *value_ptr = NULL, *traceback_ptr = NULL;
// Fetch the exception info from the Python C API
PyErr_Fetch(&type_ptr, &value_ptr, &traceback_ptr);
// Fallback error
std::string ret("Unfetchable Python error");
// If the fetch got a type pointer, parse the type into the exception string
if (type_ptr != NULL) {
py::object obj = py::reinterpret_borrow<py::object>(type_ptr);
// If a valid string extraction is available, use it
// otherwise use fallback
if (py::isinstance<py::str>(obj))
ret = obj.cast<std::string>();
else
ret = "Unknown exception type";
}
// Do the same for the exception value (the stringification of the
// exception)
if (value_ptr != NULL) {
py::object obj = py::reinterpret_borrow<py::object>(value_ptr);
if (py::isinstance<py::str>(obj))
ret += ": " + obj.cast<std::string>();
else
ret += std::string(": Unparseable Python error: ");
}
// Parse lines from the traceback using the Python traceback module
if (traceback_ptr != NULL) {
py::handle h_tb(traceback_ptr);
// Load the traceback module and the format_tb function
py::object tb(py::module::import("traceback"));
py::object fmt_tb(tb.attr("format_tb"));
// Call format_tb to get a list of traceback strings
py::object tb_list(fmt_tb(h_tb));
// Join the traceback strings into a single string
py::object tb_str(py::str("\n") + tb_list);
// Extract the string, check the extraction, and fallback in necessary
if (py::isinstance<py::str>(tb_str))
ret += ": " + tb_str.cast<std::string>();
else
ret += std::string(": Unparseable Python traceback");
}
return ret;
}
NEXTPNR_NAMESPACE_END
#endif // NO_PYTHON
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