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objexcept: Support tracebacks for user Exception subclasses.

This commit is contained in:
Paul Sokolovsky 2014-05-02 02:27:00 +03:00
parent 0a7e01ae3c
commit 91e556af23
1 changed files with 24 additions and 22 deletions
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46
py/objexcept.c
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@ -8,6 +8,7 @@
#include "qstr.h"
#include "obj.h"
#include "objtuple.h"
#include "objtype.h"
#include "runtime.h"
#include "runtime0.h"
@ -271,38 +272,39 @@ bool mp_obj_exception_match(mp_obj_t exc, const mp_obj_type_t *exc_type) {
return mp_binary_op(MP_BINARY_OP_EXCEPTION_MATCH, exc, (mp_obj_t)exc_type) == mp_const_true;
}
void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
// make sure self_in is an exception instance
// TODO add traceback information to user-defined exceptions (need proper builtin subclassing for that)
if (mp_obj_get_type(self_in)->make_new == mp_obj_exception_make_new) {
mp_obj_exception_t *self = self_in;
// traceback handling functions
// just set the traceback to the null object
// we don't want to call any memory management functions here
self->traceback = MP_OBJ_NULL;
#define GET_NATIVE_EXCEPTION(self, self_in) \
/* make sure self_in is an exception instance */ \
assert(mp_obj_is_exception_instance(self_in)); \
mp_obj_exception_t *self; \
if (mp_obj_is_native_exception_instance(self_in)) { \
self = self_in; \
} else { \
self = ((mp_obj_instance_t*)self_in)->subobj[0]; \
}
void mp_obj_exception_clear_traceback(mp_obj_t self_in) {
GET_NATIVE_EXCEPTION(self, self_in);
// just set the traceback to the null object
// we don't want to call any memory management functions here
self->traceback = MP_OBJ_NULL;
}
void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, machine_uint_t line, qstr block) {
// make sure self_in is an exception instance
// TODO add traceback information to user-defined exceptions (need proper builtin subclassing for that)
if (mp_obj_get_type(self_in)->make_new == mp_obj_exception_make_new && self_in != &mp_emergency_exception_obj) {
mp_obj_exception_t *self = self_in;
GET_NATIVE_EXCEPTION(self, self_in);
// for traceback, we are just using the list object for convenience, it's not really a list of Python objects
if (self->traceback == MP_OBJ_NULL) {
self->traceback = mp_obj_new_list(0, NULL);
}
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)file);
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)line);
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)block);
// for traceback, we are just using the list object for convenience, it's not really a list of Python objects
if (self->traceback == MP_OBJ_NULL) {
self->traceback = mp_obj_new_list(0, NULL);
}
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)file);
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)line);
mp_obj_list_append(self->traceback, (mp_obj_t)(machine_uint_t)block);
}
void mp_obj_exception_get_traceback(mp_obj_t self_in, machine_uint_t *n, machine_uint_t **values) {
// make sure self_in is an exception instance
assert(mp_obj_get_type(self_in)->make_new == mp_obj_exception_make_new);
mp_obj_exception_t *self = self_in;
GET_NATIVE_EXCEPTION(self, self_in);
if (self->traceback == MP_OBJ_NULL) {
*n = 0;