(gconstpointer) bt_cc);
}
-
-/*
- * Useful Python objects.
- */
-
-static PyObject *py_mod_bt2 = NULL;
-static PyObject *py_mod_bt2_exc_error_type = NULL;
-static PyObject *py_mod_bt2_exc_memory_error = NULL;
-static PyObject *py_mod_bt2_exc_try_again_type = NULL;
-static PyObject *py_mod_bt2_exc_stop_type = NULL;
-static PyObject *py_mod_bt2_exc_unknown_object_type = NULL;
-
-static
-void bt_bt2_cc_init_from_bt2(void)
-{
- /*
- * This is called once the bt2 package is loaded.
- *
- * Those modules and functions are needed while the package is
- * used. Loading them here is safe because we know the bt2
- * package is imported, and we know that the user cannot use the
- * code here without importing bt2 first.
- */
- py_mod_bt2 = PyImport_ImportModule("bt2");
- BT_ASSERT(py_mod_bt2);
- py_mod_bt2_exc_error_type =
- PyObject_GetAttrString(py_mod_bt2, "_Error");
- BT_ASSERT(py_mod_bt2_exc_error_type);
- py_mod_bt2_exc_memory_error =
- PyObject_GetAttrString(py_mod_bt2, "_MemoryError");
- BT_ASSERT(py_mod_bt2_exc_memory_error);
- py_mod_bt2_exc_try_again_type =
- PyObject_GetAttrString(py_mod_bt2, "TryAgain");
- BT_ASSERT(py_mod_bt2_exc_try_again_type);
- py_mod_bt2_exc_stop_type =
- PyObject_GetAttrString(py_mod_bt2, "Stop");
- BT_ASSERT(py_mod_bt2_exc_stop_type);
- py_mod_bt2_exc_unknown_object_type =
- PyObject_GetAttrString(py_mod_bt2, "UnknownObject");
- BT_ASSERT(py_mod_bt2_exc_unknown_object_type);
-}
-
-static
-void bt_bt2_cc_exit_handler(void)
-{
- /*
- * This is an exit handler (set by the bt2 package).
- *
- * We only give back the references that we took in
- * bt_bt2_cc_init_from_bt2() here. The global variables continue
- * to exist for the code of this file, but they are now borrowed
- * references. If this code is executed, it means that somehow
- * the modules are still loaded, so it should be safe to use
- * them even without a strong reference.
- *
- * We cannot do this in the library's destructor because it
- * gets executed once Python is already finalized.
- */
- Py_XDECREF(py_mod_bt2);
- Py_XDECREF(py_mod_bt2_exc_error_type);
- Py_XDECREF(py_mod_bt2_exc_try_again_type);
- Py_XDECREF(py_mod_bt2_exc_stop_type);
- Py_XDECREF(py_mod_bt2_exc_unknown_object_type);
-}
-
-
/* Library destructor */
__attribute__((destructor))
}
}
-static
-void restore_current_thread_error_and_append_exception_chain_recursive(
- int active_log_level, PyObject *py_exc_value,
- bt_self_component_class *self_component_class,
- bt_self_component *self_component,
- bt_self_message_iterator *self_message_iterator,
- const char *module_name)
-{
- PyObject *py_exc_cause_value;
- PyObject *py_exc_type = NULL;
- PyObject *py_exc_tb = NULL;
- GString *gstr = NULL;
-
- /* If this exception has a cause, handle that one first. */
- py_exc_cause_value = PyException_GetCause(py_exc_value);
- if (py_exc_cause_value) {
- restore_current_thread_error_and_append_exception_chain_recursive(
- active_log_level, py_exc_cause_value,
- self_component_class, self_component,
- self_message_iterator, module_name);
- }
-
- /*
- * If the raised exception is a bt2._Error, restore the wrapped error.
- */
- if (PyErr_GivenExceptionMatches(py_exc_value, py_mod_bt2_exc_error_type)) {
- PyObject *py_error_swig_ptr;
- const bt_error *error;
- int ret;
-
- /*
- * We never raise a bt2._Error with a cause: it should be the
- * end of the chain.
- */
- BT_ASSERT(!py_exc_cause_value);
-
- /*
- * We steal the error object from the exception, to move
- * it back as the current thread's error.
- */
- py_error_swig_ptr = PyObject_GetAttrString(py_exc_value, "_ptr");
- BT_ASSERT(py_error_swig_ptr);
-
- ret = PyObject_SetAttrString(py_exc_value, "_ptr", Py_None);
- BT_ASSERT(ret == 0);
-
- ret = SWIG_ConvertPtr(py_error_swig_ptr, (void **) &error,
- SWIGTYPE_p_bt_error, 0);
- BT_ASSERT(ret == 0);
-
- BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(error);
-
- Py_DECREF(py_error_swig_ptr);
- }
-
- py_exc_type = PyObject_Type(py_exc_value);
- py_exc_tb = PyException_GetTraceback(py_exc_value);
-
- gstr = bt_py_common_format_exception(py_exc_type, py_exc_value,
- py_exc_tb, active_log_level, false);
- if (!gstr) {
- /* bt_py_common_format_exception has already warned. */
- goto end;
- }
-
- if (self_component_class) {
- BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_COMPONENT_CLASS(
- self_component_class, "%s", gstr->str);
- } else if (self_component) {
- BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_COMPONENT(
- self_component, "%s", gstr->str);
- } else if (self_message_iterator) {
- BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_MESSAGE_ITERATOR(
- self_message_iterator, "%s", gstr->str);
- } else {
- BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_UNKNOWN(
- module_name, "%s", gstr->str);
- }
-
-end:
- if (gstr) {
- g_string_free(gstr, TRUE);
- }
-
- Py_XDECREF(py_exc_cause_value);
- Py_XDECREF(py_exc_type);
- Py_XDECREF(py_exc_tb);
-}
-
-/*
- * If you have the following code:
- *
- * try:
- * try:
- * something_that_raises_bt2_error()
- * except bt2._Error as e1:
- * raise ValueError from e1
- * except ValueError as e2:
- * raise TypeError from e2
- *
- * We will have the following exception chain:
- *
- * TypeError -> ValueError -> bt2._Error
- *
- * Where the TypeError is the current exception (obtained from PyErr_Fetch).
- *
- * The bt2._Error contains a `struct bt_error *` that used to be the current
- * thread's error, at the moment the exception was raised.
- *
- * This function gets to the bt2._Error and restores the wrapped
- * `struct bt_error *` as the current thread's error.
- *
- * Then, for each exception in the chain, starting with the oldest one, it adds
- * an error cause to the current thread's error.
- */
-static
-void restore_bt_error_and_append_current_exception_chain(
- int active_log_level,
- bt_self_component_class *self_component_class,
- bt_self_component *self_component,
- bt_self_message_iterator *self_message_iterator,
- const char *module_name)
-{
- BT_ASSERT(PyErr_Occurred());
-
- /* Used to access and restore the current exception. */
- PyObject *py_exc_type;
- PyObject *py_exc_value;
- PyObject *py_exc_tb;
-
- /* Fetch and normalize the Python exception. */
- PyErr_Fetch(&py_exc_type, &py_exc_value, &py_exc_tb);
- PyErr_NormalizeException(&py_exc_type, &py_exc_value, &py_exc_tb);
- BT_ASSERT(py_exc_type);
- BT_ASSERT(py_exc_value);
- BT_ASSERT(py_exc_tb);
-
- /*
- * Set the exception's traceback so it's possible to get it using
- * PyException_GetTraceback in
- * restore_current_thread_error_and_append_exception_chain_recursive.
- */
- PyException_SetTraceback(py_exc_value, py_exc_tb);
-
- restore_current_thread_error_and_append_exception_chain_recursive(
- active_log_level, py_exc_value, self_component_class,
- self_component, self_message_iterator, module_name);
-
- PyErr_Restore(py_exc_type, py_exc_value, py_exc_tb);
-}
-
-static inline
-void log_exception_and_maybe_append_error(int func_log_level,
- int active_log_level, bool append_error,
- bt_self_component_class *self_component_class,
- bt_self_component *self_component,
- bt_self_message_iterator *self_message_iterator,
- const char *module_name)
-{
- GString *gstr;
-
- BT_ASSERT(PyErr_Occurred());
- gstr = bt_py_common_format_current_exception(active_log_level);
- if (!gstr) {
- /* bt_py_common_format_current_exception() logs errors */
- goto end;
- }
-
- BT_COMP_LOG_CUR_LVL(func_log_level, active_log_level, self_component,
- "%s", gstr->str);
-
- if (append_error) {
- restore_bt_error_and_append_current_exception_chain(
- active_log_level, self_component_class, self_component,
- self_message_iterator, module_name);
-
- }
-
-end:
- if (gstr) {
- g_string_free(gstr, TRUE);
- }
-}
-
-static
-bt_logging_level get_self_component_log_level(bt_self_component *self_comp)
-{
- return bt_component_get_logging_level(
- bt_self_component_as_component(self_comp));
-}
-
-static
-bt_logging_level get_self_message_iterator_log_level(
- bt_self_message_iterator *self_msg_iter)
-{
- bt_self_component *self_comp =
- bt_self_message_iterator_borrow_component(self_msg_iter);
-
- return get_self_component_log_level(self_comp);
-}
-
-static inline
-void loge_exception(const char *module_name, int active_log_level)
-{
- log_exception_and_maybe_append_error(BT_LOG_ERROR, active_log_level,
- true, NULL, NULL, NULL, module_name);
-}
-
-static
-void loge_exception_message_iterator(
- bt_self_message_iterator *self_message_iterator)
-{
- bt_logging_level log_level = get_self_message_iterator_log_level(
- self_message_iterator);
-
- log_exception_and_maybe_append_error(BT_LOG_ERROR, log_level,
- true, NULL, NULL, self_message_iterator, NULL);
-}
-
-static inline
-void logw_exception(int active_log_level)
-{
- log_exception_and_maybe_append_error(BT_LOG_WARNING, active_log_level,
- false, NULL, NULL, NULL, NULL);
-}
-
static inline
int py_exc_to_status(bt_self_component_class *self_component_class,
bt_self_component *self_component,
projects / babeltrace.git / blobdiff