#pragma once
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#include <exception>
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#include <string>
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#include <torch/csrc/THP_export.h>
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#include <torch/csrc/utils/auto_gil.h>
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#include <torch/csrc/WindowsTorchApiMacro.h>
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#define HANDLE_TH_ERRORS \
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try {
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#define END_HANDLE_TH_ERRORS_RET(retval) \
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} \
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catch (python_error & e) { \
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return retval; \
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} \
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catch (const c10::IndexError& e) { \
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auto msg = torch::processErrorMsg(e.what_without_backtrace()); \
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PyErr_SetString(PyExc_IndexError, msg.c_str()); \
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return retval; \
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} \
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catch (const c10::Error& e) { \
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auto msg = torch::processErrorMsg(e.what_without_backtrace()); \
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PyErr_SetString(PyExc_RuntimeError, msg.c_str()); \
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return retval; \
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} \
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catch (torch::PyTorchError & e) { \
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auto msg = torch::processErrorMsg(e.what()); \
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PyErr_SetString(e.python_type(), msg.c_str()); \
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return retval; \
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} \
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catch (const std::exception& e) { \
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auto msg = torch::processErrorMsg(e.what()); \
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PyErr_SetString(PyExc_RuntimeError, msg.c_str()); \
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return retval; \
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}
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#define END_HANDLE_TH_ERRORS END_HANDLE_TH_ERRORS_RET(nullptr)
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extern PyObject *THPException_FatalError;
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// Throwing this exception means that the python error flags have been already
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// set and control should be immediately returned to the interpreter.
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struct python_error : public std::exception {
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python_error() : type(nullptr), value(nullptr), traceback(nullptr) {}
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python_error(const python_error &other) : type(other.type), value(other.value), traceback(other.traceback) {
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AutoGIL gil;
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Py_XINCREF(type);
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Py_XINCREF(value);
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Py_XINCREF(traceback);
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}
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python_error(python_error&& other) {
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type = other.type;
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value = other.value;
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traceback = other.traceback;
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other.type = nullptr;
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other.value = nullptr;
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other.traceback = nullptr;
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}
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~python_error() override {
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if (type || value || traceback) {
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AutoGIL gil;
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Py_XDECREF(type);
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Py_XDECREF(value);
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Py_XDECREF(traceback);
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}
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}
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/** Saves the exception so that it can be re-thrown on a different thread */
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inline void persist() {
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if (type) return; // Don't overwrite exceptions
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// PyErr_Fetch overwrites the pointers
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AutoGIL gil;
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Py_XDECREF(type);
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Py_XDECREF(value);
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Py_XDECREF(traceback);
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PyErr_Fetch(&type, &value, &traceback);
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}
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/** Sets the current Python error from this exception */
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inline void restore() {
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if (!type) return;
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// PyErr_Restore steals references
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AutoGIL gil;
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Py_XINCREF(type);
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Py_XINCREF(value);
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Py_XINCREF(traceback);
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PyErr_Restore(type, value, traceback);
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}
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PyObject* type;
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PyObject* value;
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PyObject* traceback;
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};
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#ifdef _THP_CORE
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bool THPException_init(PyObject *module);
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#endif
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namespace torch {
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THP_CLASS std::string processErrorMsg(std::string str);
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// Abstract base class for exceptions which translate to specific Python types
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struct PyTorchError : public std::exception {
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virtual PyObject* python_type() = 0;
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const char* what() const noexcept override {
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return msg.c_str();
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}
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std::string msg;
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};
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// Translates to Python IndexError
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struct IndexError : public PyTorchError {
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IndexError(const char *format, ...);
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PyObject* python_type() override {
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return PyExc_IndexError;
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}
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};
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// Translates to Python TypeError
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struct TypeError : public PyTorchError {
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TORCH_API TypeError(const char *format, ...);
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PyObject* python_type() override {
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return PyExc_TypeError;
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}
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};
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// Translates to Python ValueError
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struct ValueError : public PyTorchError {
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ValueError(const char *format, ...);
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PyObject* python_type() override {
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return PyExc_ValueError;
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}
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};
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} // namespace torch
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