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refactor traceback handling

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microDev 2021-11-10 16:12:42 +05:30
parent 22b7ffc6ed
commit 6d2f4f59f8
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GPG Key ID: 2C0867BE60967730
4 changed files with 18 additions and 23 deletions
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4
py/mpstate.h
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@ -140,14 +140,10 @@ typedef struct _mp_state_vm_t {
#if MICROPY_KBD_EXCEPTION
// exception object of type KeyboardInterrupt
mp_obj_exception_t mp_kbd_exception;
// traceback object to store traceback
mp_obj_traceback_t mp_kbd_traceback;
#endif
// exception object of type ReloadException
mp_obj_exception_t mp_reload_exception;
// traceback object to store traceback
mp_obj_traceback_t mp_reload_traceback;
// dictionary with loaded modules (may be exposed as sys.modules)
mp_obj_dict_t mp_loaded_modules_dict;

29
py/objexcept.c
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@ -166,15 +166,7 @@ mp_obj_t mp_obj_exception_make_new(const mp_obj_type_t *type, size_t n_args, siz
// Populate the exception object
o_exc->base.type = type;
// Try to allocate memory for the traceback, with fallback to emergency traceback object
o_exc->traceback = m_new_obj_maybe(mp_obj_traceback_t);
if (o_exc->traceback == NULL) {
o_exc->traceback = &MP_STATE_VM(mp_emergency_traceback_obj);
}
// Populate the traceback object
*o_exc->traceback = mp_const_empty_traceback_obj;
o_exc->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
mp_obj_tuple_t *o_tuple;
if (n_args == 0) {
@ -228,7 +220,7 @@ void mp_obj_exception_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
// store/delete attribute
if (attr == MP_QSTR___traceback__) {
if (dest[1] == mp_const_none) {
self->traceback->data = NULL;
self->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
} else {
if (!mp_obj_is_type(dest[1], &mp_type_traceback)) {
mp_raise_TypeError(MP_ERROR_TEXT("invalid traceback"));
@ -244,7 +236,7 @@ void mp_obj_exception_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
} else if (attr == MP_QSTR_value && self->base.type == &mp_type_StopIteration) {
dest[0] = mp_obj_exception_get_value(self_in);
} else if (attr == MP_QSTR___traceback__) {
dest[0] = (self->traceback->data) ? MP_OBJ_FROM_PTR(self->traceback) : mp_const_none;
dest[0] = (self->traceback) ? MP_OBJ_FROM_PTR(self->traceback) : mp_const_none;
#if MICROPY_CPYTHON_COMPAT
} else if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(self->base.type), MP_OBJ_FROM_PTR(&mp_type_OSError))) {
if (attr == MP_QSTR_errno) {
@ -552,14 +544,23 @@ bool mp_obj_exception_match(mp_obj_t exc, mp_const_obj_t exc_type) {
void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
mp_obj_exception_t *self = get_native_exception(self_in);
// just set the traceback to the null object
// just set the traceback to the empty traceback object
// we don't want to call any memory management functions here
self->traceback->data = NULL;
self->traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
}
void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block) {
mp_obj_exception_t *self = get_native_exception(self_in);
// Try to allocate memory for the traceback, with fallback to emergency traceback object
if (self->traceback == NULL || self->traceback == (mp_obj_traceback_t *)&mp_const_empty_traceback_obj) {
self->traceback = m_new_obj_maybe(mp_obj_traceback_t);
if (self->traceback == NULL) {
self->traceback = &MP_STATE_VM(mp_emergency_traceback_obj);
}
}
// append this traceback info to traceback data
// if memory allocation fails (eg because gc is locked), just return
@ -613,7 +614,7 @@ void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qs
void mp_obj_exception_get_traceback(mp_obj_t self_in, size_t *n, size_t **values) {
mp_obj_exception_t *self = get_native_exception(self_in);
if (self->traceback->data == NULL) {
if (self->traceback == NULL) {
*n = 0;
*values = NULL;
} else {

6
py/runtime.c
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@ -80,14 +80,12 @@ void mp_init(void) {
// initialise the exception object for raising KeyboardInterrupt
MP_STATE_VM(mp_kbd_exception).base.type = &mp_type_KeyboardInterrupt;
MP_STATE_VM(mp_kbd_exception).args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
MP_STATE_VM(mp_kbd_exception).traceback = &MP_STATE_VM(mp_kbd_traceback);
*MP_STATE_VM(mp_kbd_exception).traceback = mp_const_empty_traceback_obj;
MP_STATE_VM(mp_kbd_exception).traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
#endif
MP_STATE_VM(mp_reload_exception).base.type = &mp_type_ReloadException;
MP_STATE_VM(mp_reload_exception).args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
MP_STATE_VM(mp_reload_exception).traceback = &MP_STATE_VM(mp_reload_traceback);
*MP_STATE_VM(mp_reload_exception).traceback = mp_const_empty_traceback_obj;
MP_STATE_VM(mp_reload_exception).traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
// call port specific initialization if any
#ifdef MICROPY_PORT_INIT_FUNC

2
py/scheduler.c
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@ -42,7 +42,7 @@ void MICROPY_WRAP_MP_SCHED_EXCEPTION(mp_sched_exception)(mp_obj_t exc) {
#if MICROPY_KBD_EXCEPTION
// This function may be called asynchronously at any time so only do the bare minimum.
void MICROPY_WRAP_MP_SCHED_KEYBOARD_INTERRUPT(mp_sched_keyboard_interrupt)(void) {
MP_STATE_VM(mp_kbd_exception).traceback->data = NULL;
MP_STATE_VM(mp_kbd_exception).traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj;
mp_sched_exception(MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception)));
}
#endif