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Implement traceback length limit

This commit is contained in:
Jeff Epler 2023-08-15 13:10:31 -05:00
parent d766795c58
commit 8d5e844b00
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GPG Key ID: D5BF15AB975AB4DE
1 changed files with 10 additions and 0 deletions
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10
py/objexcept.c
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@ -589,6 +589,16 @@ void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block) {
mp_obj_exception_t *self = mp_obj_exception_get_native(self_in);
#if MICROPY_PY_SYS_TRACEBACKLIMIT
mp_int_t max_traceback = MP_OBJ_SMALL_INT_VALUE(MP_STATE_VM(sys_mutable[MP_SYS_MUTABLE_TRACEBACKLIMIT]));
if (max_traceback <= 0) {
return;
} else if (self->traceback != NULL && self->traceback->len >= max_traceback * TRACEBACK_ENTRY_LEN) {
self->traceback->len -= TRACEBACK_ENTRY_LEN;
memmove(self->traceback->data, self->traceback->data + TRACEBACK_ENTRY_LEN, self->traceback->len * sizeof(self->traceback->data[0]));
}
#endif
// 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);